Press-action device

BACKGROUND OF THE INVENTION

1. Field of the Invention

0001The present invention relates to a press-action device; more particularly, the present invention relates to an elongated press-action device, such as a writing instrument, a toy, or an ornament/accessory attached to a key-chain, a necklace, a cell phone, etc.

2. Description of the Related Art

0002A window pen is one type of press pen which has been developed for a very long time. Generally, when a user pushes a button of the window pen, a pattern (such as a text pattern or a graphical pattern) displayed on the window of a holding barrel is changed accordingly. The principle of the window pen is that once the button of the pen is pressed, the cartridge of the window pen rotates slightly. Therefore, a rotation barrel printed with a plurality of patterns (such as text patterns or graphical patterns) is mounted on the cartridge such that when the pen cap is pressed, the rotation barrel is driven to rotate and thus causes the plurality of patterns printed on the rotation barrel to be displayed in turn in a window. Please refer to <patcit id="pcit0001" dnum="US2896348A"><text>U.S. Patent No. 2,896,348</text></patcit>, <patcit id="pcit0002" dnum="US2971283A"><text>U.S. Patent No. 2,971,283</text></patcit>, <patcit id="pcit0003" dnum="US3343293A"><text>U.S. Patent No. 3,343,293</text></patcit>, <patcit id="pcit0004" dnum="US6386780B"><text>U.S. Patent No. 6,386,780</text></patcit> and <patcit id="pcit0005" dnum="US6742953B"><text>U.S. Patent No. 6,742,953</text></patcit> for more details of the structure of the window pen.

0003However, in known prior arts, the plurality of patterns are always displayed in turn. After a user is familiar with the sequence of the patterns, the user can easily predict the content of the next pattern to be displayed. As a result, the traditional window pen becomes boring very soon. Therefore, if the plurality of patterns can be randomly displayed in the window, the user will feel much more interested and amused.

0004Further, a conventional window pen only has one rotation barrel; therefore, the window can display only one certain pattern of the rotation barrel at one time. If the window pen has a plurality of rotation barrels, such as three rotation barrels, then when the pen cap is pressed, these rotation barrels can independently rotate so as to randomly display different patterns, thus increasing the entertainment value. The most common three-barrel rotation mechanism is a slot machine. Please refer to <patcit id="pcit0006" dnum="US3565441A"><text>U.S. Patent No. 3,565,441</text></patcit>, <patcit id="pcit0007" dnum="US4002335A"><text>U.S. Patent No. 4,002,335</text></patcit>, <patcit id="pcit0008" dnum="US4037845A"><text>U.S. Patent No. 4,037,845</text></patcit>, <patcit id="pcit0009" dnum="US4097048A"><text>U.S. Patent No. 4,097,048</text></patcit>, <patcit id="pcit0010" dnum="US4261571A"><text>U.S. Patent No. 4,261,571</text></patcit>, <patcit id="pcit0011" dnum="US4492379A"><text>U.S. Patent No. 4,492,379</text></patcit>, <patcit id="pcit0012" dnum="US4666159A"><text>U.S. Patent No. 4,666,159</text></patcit>, and <patcit id="pcit0013" dnum="US5054782A"><text>U.S. Patent No. 5,054,782</text></patcit> for more details of the structure of a slot machine. However, in the abovementioned prior art patents, the driving mechanism for the rotation barrel is basically installed in one side of a rotation barrel. It is very difficult to implement the existing mechanism of the slot machine in a window pen, since the interior space of the window pen is very narrow. Further, in order to contain the driving mechanism, the diameter of the rotation barrel has to be half of that of the holding barrel, but such a design would allow only a very small pattern to be printed on the rotation barrel. In the technical field of a conventional window pen, the concept of a plurality of freely-rotating rotation barrels has never been disclosed. Even if someone were to come up with the idea of combining a plurality of rotation barrels with a window pen, he/she still would still need to solve the problem of the very small interior space of the holding barrel.

SUMMARY OF THE INVENTION

0005It is an object of the present invention to provide a press-action device, such as a writing instrument, which can randomly display patterns in a window of the press-action device.

0006It is another object of the present invention to provide a press-action device, such as a writing instrument, which has at least one rotation barrel capable of performing free rotation.

0007To achieve the aforementioned objects, it is necessary to invent a press-action device such as a writing instrument which comprises a holding barrel, a push button, a writing element, a pressing module, a rotation module, and a writing element spring. The holding barrel comprises a first end, a second end, and a window. The push button is flexibly disposed to the first end of the holding barrel. The push button allows a user to propel/repel so as to perform a linear motion. The writing element is installed in the holding barrel, and the writing element has a writing end. When the push button is propelled/repelled, the pressing module drives the writing end of the writing element to protrude from or retract into the second end of the holding barrel.

0008The rotation module is connected with the push button, and the rotation module comprises a driving part and at least one rotation barrel. The driving part is connected with the push button so as to drive the rotation barrel to rotate.

0009By means of the aforementioned structure, when the user pushes the push button, the push button firstly performs a first stage, and then performs a second stage. When the push button is performing the first stage, the driving part drives a following part, so as to drive the rotation barrel to rotate, and therefore the writing end can gradually protrude from the second end of the holding barrel. When the push button is performing the second stage, the driving part departs from the following part, so as to make the rotation barrel freely rotate according to the inertia of a force generated when the user pushes the push button during the first stage, and therefore the writing end is protruded from the second end of the holding barrel.

0010According to one of the preferred embodiments of the present invention, there can be a plurality of rotation barrels. The plurality of rotation barrels can respectively rotate such that when each of the rotation barrels stops, the window can randomly display different patterns.

0011According to one of the preferred embodiments of the present invention, the driving part comprises a rotation shaft receiver and a rotation shaft. The rotation shaft receiver is fixed to the first end of the holding barrel, and has a guiding part. The rotation shaft is connected with the push button, and is flexibly installed in the rotation shaft receiver. The rotation shaft has an external thread, which is associated with the guiding part.

0012According to one of the preferred embodiments of the present invention, the driving part comprises a curved surface and a slice body. The curved surface is slidingly contacted with the push button. The slice body is connected with the curved surface, and is limited to be positioned in the holding barrel. The slice body can move along a vertical direction of the holding barrel.

0013It should be noted that the press-action device does not have to be a writing instrument. The most novel portion of the present invention is the rotation module, which can be installed in a narrow and elongated barrel. Therefore, the press-action device can be a toy, an ornament/accessory attached to a key-chain, a necklace, a cell phone, etc.

0014Other objects, advantages, and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

0015<ul id="ul0001" list-style="none" compact="compact"><li><figref idref="f0001">FIG. 1</figref> illustrates a schematic drawing of a press-action writing instrument according to a first embodiment of the present invention.</li><li><figref idref="f0002">FIG. 2</figref> is an exploded view of the press-action writing instrument according to the first embodiment of the present invention.</li><li><figref idref="f0003 f0004">FIGs. 2A to 2D</figref> illustrate schematic drawings respectively showing relations among a guiding protrusion of a rotation shaft and guiding blocks of a rotation barrel at different stages according to the first embodiment of the present invention.</li><li><figref idref="f0005">FIG. 3 and FIG. 3A</figref> illustrate cross-sectional views of the press-action writing instrument when a push button is not yet triggered, according to the first embodiment of the present invention.</li><li><figref idref="f0005">FIG. 3B</figref> illustrates a cross-sectional view of a guiding part of a rotation shaft receiver according to the present invention.</li><li><figref idref="f0006">FIG. 4 and FIG. 4A</figref> illustrate cross-sectional views of the press-action writing instrument when the push button is performing a first stage, according to the first embodiment of the present invention.</li><li><figref idref="f0007">FIG. 5 and FIG. 5A</figref> illustrate cross-sectional views of the press-action writing instrument when the push button is performing a second stage, according to the first embodiment of the present invention.</li><li><figref idref="f0008">FIG. 6 and FIG. 6A</figref> illustrate cross-sectional views of the press-action writing instrument when the push button is performing a third stage, according to the first embodiment of the present invention.</li><li><figref idref="f0009">FIG. 7</figref> illustrates a perspective view of the press-action writing instrument according to a second embodiment of the present invention.</li><li><figref idref="f0010">FIG. 8</figref> is an exploded view of the press-action writing instrument according to the second embodiment of the present invention.</li><li><figref idref="f0011">FIG. 9A</figref> illustrates a perspective view of the press-action writing instrument when the push button is not yet triggered, according to the second embodiment of the present invention.</li><li><figref idref="f0011">FIG. 9B</figref> illustrates a perspective view of the press-action writing instrument when the push button has been triggered, according to the second embodiment of the present invention.</li><li><figref idref="f0012">FIG. 10A</figref> illustrates a cross-sectional view of the press-action writing instrument when the push button is not yet triggered, according to the second embodiment of the present invention.</li><li><figref idref="f0012">FIG. 10B</figref> illustrates a cross-sectional view of the press-action writing instrument when the push button is performing the first stage, according to the second embodiment of the present invention.</li><li><figref idref="f0012">FIG. 10C</figref> illustrates a cross-sectional view of the press-action writing instrument when the push button is performing the second stage, according to the second embodiment of the present invention.</li><li><figref idref="f0013">FIG. 11</figref> illustrates a schematic drawing of the press-action writing instrument according to a third embodiment of the present invention.</li><li><figref idref="f0014">FIG. 12</figref> is an exploded view of the press-action writing instrument according to the third embodiment of the present invention.</li><li><figref idref="f0015 f0016">FIGs. 12A to 12D</figref> illustrate schematic drawings respectively showing relations among each guiding protrusion of the rotation shaft and guiding blocks of each rotation barrel at different stages according to the third embodiment of the present invention.</li><li><figref idref="f0017 f0018 f0019 f0020">FIGs 13A to 13D</figref> illustrate perspective views, associated with <figref idref="f0015 f0016">FIGs. 12A to 12D</figref>, respectively showing relations between each rotation barrel and the rotation shaft at different stages.</li><li><figref idref="f0021">FIG. 14A and FIG. 14B</figref> illustrate schematic drawings showing that three rotation barrels can randomly display different patterns in a window according to the third embodiment of the present invention.</li><li><figref idref="f0022">FIG. 15</figref> illustrates a perspective view of a press-action device according to a fourth embodiment of the present invention.</li><li><figref idref="f0023">FIG. 15A</figref> illustrates an exploded view of a press-action device according to a fourth embodiment of the present invention.</li><li><figref idref="f0024">FIG. 16</figref> illustrates a perspective view of a press-action device according to a fifth embodiment of the present invention.</li><li><figref idref="f0024">FIG. 16A</figref> illustrates an exploded view of a press-action device according to a fifth embodiment of the present invention.</li></ul>

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

0016Please refer to <figref idref="f0001 f0002 f0003 f0004 f0005">FIGs. 1 to 3</figref>. A press-action device such as a press-action writing instrument 1 of the present invention mainly comprises a holding barrel 10, a push button 20, a writing element 30, a pressing module 40, a rotation module 50, a writing element spring 35, and an auxiliary spring 80.

0017The holding barrel 10 comprises a first end 12, a second end 14, and a window 16. The first end 12 and the second end 14 are located at two extreme ends of the holding barrel 10. In this embodiment, the window 16 is a rectangular opening. The holding barrel 10 further comprises a transparent element 17 located corresponding to the window 16 for covering the window 16.

0018The push button 20 is disposed at the first end 12 of the holding barrel 10, and the writing element 30 is installed in the holding barrel 10. The writing element 30 has a writing end 32. The writing element spring 35 is disposed around the writing element 30. When the push button 20 is propelled/repelled, the pressing module 40 can drive the writing end 32 of the writing element 30 to protrude from or retract into the second end 14 by means of associating with the writing element spring 35. Because the pressing module 40 of a press pen is a known prior art which can be implemented by various kinds of mechanisms, and the structure of the pressing module 40 is not the improved portion of the present invention, there is no need to describe its structure in detail.

0019The rotation module 50 comprises a driving part 60 and a rotation barrel 70. The object of the driving part 60 is used for driving the rotation barrel 70 to rotate.

0020The driving part 60 is a driving mechanism having a rotation shaft receiver 62 and a rotation shaft 64. The rotation shaft receiver 62 and a clip 11 are fastened to the first end 12 of the holding barrel 10. The rotation shaft receiver 62 has a through hole 621 and a guiding part 622.

0021The rotation shaft 64 is installed in the rotation shaft receiver 62 and the rotation barrel 70. The rotation shaft 64 mainly comprises an external thread 642 and a pair of guiding protrusions 644. Furthermore, in order to connecting the rotation shaft 64 with the push button 20, one end of the rotation shaft 64 has a positioning protrusion 646, and the inside of the push button 20 has a positioning indentation 22, wherein the sizes and locations of the positioning protrusion 646 and the positioning indentation 22 match with each other, such that the positioning protrusion 646 can be connected with the positioning indentation 22.

0022One end of another auxiliary spring 80 (such as a spring) is disposed around the rotation shaft receiver 62, while the other end of the auxiliary spring 80 is placed against the push button 20.

0023The rotation barrel 70 is installed in the holding barrel 10 and is located corresponding to the window 16. The exterior of the rotation barrel 70 can be printed with or attached with different patterns 74 (such as text patterns or graphical patterns). Furthermore, the rotation barrel 70 has a following part 72. In this embodiment, the following part 72 comprises six equidistantly-arranged guiding blocks 76. Please refer to <figref idref="f0003">FIG. 2A</figref>; each guiding block 76 is roughly trapezoidal in shape, and has a long wall 761, an oblique wall 762 and a short wall 763. A guiding groove 764 is formed between every two adjacent guiding blocks 76.

0024Please refer to <figref idref="f0002 f0003 f0004 f0005 f0006 f0007 f0008">FIGs. 2 to 6</figref> for more details of the four stages of the press-action writing instrument 1 according to a first embodiment of the present invention:

(1) Initial stage:

0025Please refer to <figref idref="f0002">FIG. 2</figref>, <figref idref="f0003">FIG. 2A</figref>, <figref idref="f0005">FIG. 3 and FIG. 3A</figref>. During the initial stage, the writing end 32 of the writing element 30 is not yet protruding from the holding barrel 10. At this time, both the push button 20 and the rotation shaft 64 are located at the top, and the guiding protrusion 644 is located at the upper edge of the guiding groove 764.

(2) First stage (Driving stage):

0026Please refer to <figref idref="f0003">FIG. 2B</figref>, <figref idref="f0006">FIG. 4, and FIG. 4A</figref> regarding a process of driving the rotation barrel 70 to rotate during the first stage. Please refer to <figref idref="f0005">FIG. 3B</figref> as well. In this embodiment, the guiding part 622 includes two projections located in the central of the through hole 621. Therefore, when a user pushes the push button 20, the rotation shaft 64 would move downwards to pass through the through hole 621, such that the guiding part 622 can drive the rotation shaft 64 to rotate by means of moving along the external thread 642 (in this embodiment, the rotation shaft 64 performs a clockwise rotation). At this time, the guiding protrusion 644 also moves and rotates downwards, such that the guiding protrusion 644 pushes the long wall 761 of the guiding block 76 so as drive the rotation barrel 70 to rotate accordingly. With regard to the guiding protrusion 644, during the first stage, the guiding protrusion 644 moves from the upper edge of the guiding groove 764 (as shown in <figref idref="f0003">FIG. 2A</figref>) to the lower edge of the guiding groove 764 (as shown in <figref idref="f0004">FIG. 2C</figref>). Please note that the present invention comprises at least one guiding protrusion 644, or as many guiding protrusions 644 as the guiding grooves 764 (in this embodiment, there are six guiding grooves 764).

(3) Second stage (Free rotation stage):

0027Please refer to <figref idref="f0004">FIG. 2C</figref>, <figref idref="f0007">FIG. 5, and FIG. 5A</figref>. The second stage is performed right after the first stage. During the second stage, the rotation shaft 64 keeps moving downwards such that the driving part 60 departs from the following part 72, which means that the guiding protrusion 644 departs from the guiding groove 764; therefore, the guiding protrusion 644 can no longer push the long wall 761 of the guiding block 76, and the guiding protrusion 644 can no longer hold the guiding block 76. As a result, the guiding protrusion 644 is completely departed from the following part 72 such that the rotation barrel 70 can freely rotate.

0028During the first stage and the second stage, the writing end 32 of the writing element 30 protrudes from the holding barrel 10 (as shown in <figref idref="f0007">FIG. 5</figref>) because it is pushed downwards by the rotation shaft 64.

(4) Third stage (Positioning stage):

0029Please refer to <figref idref="f0004">FIG. 2D</figref>, <figref idref="f0008">FIG. 6 and FIG. 6A</figref>. During the third stage, the user releases the push button 20, such that the rotation shaft 64 can move upwards due to the rebound from the writing element spring 35 and the auxiliary spring 80. Therefore, the guiding protrusion 644 re-enters the guiding groove 764. Please note that because the lower edge of the guiding groove 764 is wide in comparison to the shape of the guiding block 76, the guiding protrusion 644 can easily slide into the guiding groove 764 even when the rotation barrel 70 is still rotating. Finally, the guiding protrusion 644 is returned to the position as shown in <figref idref="f0003">FIG. 2A</figref>. Similarly, when the rotation shaft 64 moves upwards, the guiding part 622 will drive the rotation shaft 64 to rotate due to the external thread 642 (in this embodiment, the rotation shaft 64 performs a counterclockwise rotation). Because the guiding protrusion 644 would finally hold the guiding block 76, the rotation barrel 70 would stop rotating accordingly.

0030In this embodiment, there are six guiding blocks 76, thereby forming six guiding grooves 764. Therefore, the exterior of the rotation barrel 70 can be printed with or attached with six different patterns 74. According to the aforementioned mechanism, those six different patterns 74 would be randomly displayed on the window 16. Please note further that there are two guiding protrusions 644 in this embodiment. However, the present invention can have as few as one guiding protrusion 644, or have as many as three to six guiding protrusions 644, because there are six guiding grooves 764 in this embodiment. In order to take the thrust and balance into consideration, please note that there should be a plurality of guiding protrusions 644, wherein each of the included angles between every two guiding protrusions 644 is the same. Furthermore, if there is a plurality of rotation barrels (please refer to a third embodiment of the present invention described later), there would be a plurality of pairs of guiding protrusions. Moreover, the number of the guiding blocks 76 can be less or more, but preferably at least three.

0031The aforementioned first, second and third stages respectively describe statuses of the writing end 32 of the writing element 30 from "non-protruded" to "protruded" from the holding barrel 10. When the user pushes the push button 20 again to change the status of the writing end 32 from "protruded" to "non protruded" from the holding barrel 10, the process would be the same as what happens during the first, second and third stages. Because the auxiliary spring 80 is capable of returning the push button 20 back to its original position (as shown in <figref idref="f0008">FIG. 6</figref>), it follows that when the user pushes the push button 20 again, the actions between the rotation shaft 64 and the rotation barrel 70 would be the same as the actions from the first stage to the third stage.

0032Please refer to <figref idref="f0009 f0010 f0011 f0012">FIGs. 7 to 10A</figref> regarding a press-action device such as a press-action writing instrument 1a according to a second embodiment of the present invention. The press-action writing instrument 1a mainly comprises a holding barrel 10a, a push button 20a, a writing element 30a, a pressing module 40a, a rotation module 50a, and a writing element spring 35a. The major difference between the first embodiment and the second embodiment is the structure of the driving part 60 and the following part 72a. Further, although the pressing module 40a in the second embodiment is different from the pressing module 40 in the first embodiment, there is no need to describe the structure of the pressing module 40a in detail because the pressing module is a known prior art (i.e. the function of the pressing module in the present invention is to cause the writing end of the writing element to protrude from or retract into the holding barrel).

0033In this embodiment, the driving part 60a comprises a curved surface 66 and a slice body 67. The curved surface 66 is slidingly contacted with the push button 20a. The slice body 67 is connected with the curved surface 66. The slice body 67 is limited to being positioned in the holding barrel 10a, and the slice body 67 can move along a vertical direction of the holding barrel 10a.

0034The slice body 67 comprises an opening 671 and a protrusion 672. The following part 72a is located in the opening 671, and the protrusion 672 can be connected with the following part 72a. In this embodiment, the following part 72a is a gear with six teeth. Please note that the number of teeth is not limited to the above description.

0035The slice body 67 further comprises at least one force-receiving part 673. The interior of the holding barrel 10a further has a slice body containing groove 18a and at least one first auxiliary spring positioning part 19a, wherein the slice body containing groove 18a is used for containing part of the slice body 67.

0036In this embodiment, the press-action writing instrument 1a further comprises at least one first auxiliary spring 82a and a second auxiliary spring 84a. Two ends of each first auxiliary spring 82a are respectively placed against each force-receiving part 673 and each first auxiliary spring positioning part 19a. The first auxiliary spring 82a can help the slice body 67 to return to its original position.

0037The press-action writing instrument 1a further comprises a driving shaft body 90. Two ends of the driving shaft body 90 are respectively connected with the push button 20a and the writing element 30a. From bottom to top, the driving shaft body 90 sequentially passes through the second auxiliary spring 84a, the rotation barrel 70a, the following part 72a and the driving part 60a (as shown in <figref idref="f0010">FIG. 8</figref>).

0038Please refer to <figref idref="f0009 f0010 f0011 f0012">FIGs. 7 to 10</figref> for more details of the implementation, which is also divided into four stages, of the press-action writing instrument 1a according to the second embodiment of the present invention.

(1) Initial stage:

0039Please refer to <figref idref="f0010">FIG. 8</figref>, <figref idref="f0011">FIG. 9A</figref> and <figref idref="f0012">FIG. 10A</figref>. <figref idref="f0011">FIG. 9A</figref> illustrates a perspective view of the press-action writing instrument 1a when the push button 20a is not yet triggered, according to the second embodiment of the present invention.

0040Because the push button 20a has not yet been pushed, the push button 20a has not driven the curved surface 66 of the driving part 60a to move.

(2) First stage (Driving stage):

0041Please refer to <figref idref="f0010">FIG. 8</figref>, <figref idref="f0011">FIG. 9B</figref> and <figref idref="f0012">FIG. 10B</figref>. During the first stage, when the push button 20a moves downwards (i.e. moves along the direction of the downward arrow as shown in <figref idref="f0011">FIG. 9B</figref>), the push button 20a drives the curved surface 66 to move along a vertical direction of the holding barrel 10a (i.e. move along the direction of the left arrow as shown in <figref idref="f0011">FIG. 9B</figref>). Meanwhile, the protrusion 672 of the slice body 67 moves left (i.e. moves along the direction of the left arrow as shown in <figref idref="f0012">FIG. 10B</figref>) to hit one of the teeth of the following part 72a, so as to drive the rotation barrel 70a to rotate.

(3) Second stage (Free rotation stage):

0042Please refer to <figref idref="f0010">FIG. 8</figref> and <figref idref="f0012">FIG. 10C</figref>. During the second stage, the slice body 67 keeps moving left (i.e. moving along the direction of the left arrow as shown in <figref idref="f0012">FIG. 10C</figref>), such that the following part 72a departs from the limitation of the protrusion 672, and therefore the following part 72a can freely rotate according to inertia of a force generated when the user pushes the push button 20a, so as to drive the rotation barrel 70a to freely rotate.

(4) Third stage (Positioning stage):

0043Please refer to <figref idref="f0010">FIG. 8</figref>, <figref idref="f0011">FIG. 9A</figref> and <figref idref="f0012">FIG. 10A</figref>. During the third stage, the user releases the push button 20a to eliminate the force, and therefore the driving part 60a receives a rebound from the first auxiliary spring 82a, such that the slice body 67 can be returned from the position as shown in <figref idref="f0012">FIG. 10C</figref> to the position as shown in <figref idref="f0012">FIG. 10A</figref>, and the slice body 67 can position the following part 72a via the positioning part 674.

0044Because the number of the teeth of the following part 72a completely matches with the number of the patterns 74, one of the patterns 74 of the rotation barrel 70a would face toward the window 16a.

0045Please refer to <figref idref="f0013">FIG. 11</figref>, <figref idref="f0014">FIG. 12</figref>, <figref idref="f0015 f0016">FIGs. 12A to 12D</figref>, and <figref idref="f0017 f0018 f0019 f0020">FIGs. 13A to 13D</figref> regarding a press-action device such as a press-action writing instrument 1b according to a third embodiment of the present invention. The press-action writing instrument 1b of the third embodiment is quite similar to the press-action writing instrument 1 of the first embodiment. The press-action writing instrument 1b mainly comprises a holding barrel 10, a push button 20b, a writing element 30, a pressing module 40, a rotation module 50b, a writing element spring 35, and an auxiliary spring 80b. The major difference between the press-action writing instrument 1b of the third embodiment and the press-action writing instrument 1 of the first embodiment is the structure of the rotation module 50b.

0046The rotation module 50b comprises three tandem-arranged rotation barrels 70b. Each rotation barrel 70b has a following part 72b, and each following part 72b has six guiding blocks 76b. In fact, the structure of the rotation barrel 70b of this embodiment is quite similar to that of the rotation barrel 70 of the first embodiment, but the rotation barrel 70b of this embodiment is shorter in length.

0047The rotation module 50b also comprises a driving part 60b. The driving part 60b also has a rotation shaft receiver 62b and a rotation shaft 64b. The rotation shaft receiver 62b is combined with a clip 11b. Similarly, the rotation shaft receiver 62b also has a through hole 621b and a guiding part 622b similar to that of the first embodiment (please refer to <figref idref="f0005">FIG. 3B</figref> of the first embodiment), such that the rotation shaft 64b can rotate downwards and upwards. The rotation shaft 64b has three pairs of guiding protrusions 644b respectively correspondingly to the following part 72b of each of the rotation barrels 70b.

0048In the third embodiment, the auxiliary spring 80b is placed under the rotation shaft 64b. When the push button 20b is not pushed, the auxiliary spring 80b can push the rotation shaft 64b upwards, such that the push button 20b can be returned to its top position.

0049Please refer to <figref idref="f0013">FIG. 11</figref>, <figref idref="f0014">FIG. 12</figref>, <figref idref="f0015 f0016">FIGs. 12A to 12D</figref>, and <figref idref="f0017 f0018 f0019 f0020">FIGs. 13A to 13D</figref> for more details of the implementation, which is also divided into four stages, of the press-action writing instrument 1b according to the third embodiment of the present invention.

(1) Initial stage:

0050Please refer to <figref idref="f0014">FIG. 12</figref>, <figref idref="f0015">FIG. 12A</figref> and <figref idref="f0017">FIG. 13A</figref>. At this time, both the push button 20b and the rotation shaft 64b are located at the top, and each guiding protrusion 644b is located at the upper edge of each guiding groove 764b.

(2) First stage (Driving stage):

0051Please refer to <figref idref="f0014">FIG. 12</figref>, <figref idref="f0015">FIG. 12B</figref> and <figref idref="f0018">FIG. 13B</figref>. When the user pushes the push button 20b, the rotation shaft 64b moves and rotates downwards (in this embodiment, the rotation shaft 64b performs a clockwise rotation), such that the guiding protrusion 644b pushes the guiding block 76b, so as to drive each rotation barrel 70b to rotate accordingly. Please refer to the description of the first embodiment for more details of the interaction among each component.

(3) Second stage (Free rotation stage):

0052Please refer to <figref idref="f0014">FIG. 12</figref>, <figref idref="f0016">FIG. 12C</figref> and <figref idref="f0019">FIG. 13C</figref>. When each guiding protrusion 644b departs from each guiding groove 764b, each rotation barrel 70b can freely rotate. Please refer to the description of the first embodiment for more details of the interaction among each component.

(4) Third stage (Positioning stage):

0053Please refer to <figref idref="f0014">FIG. 12</figref>, <figref idref="f0016">FIG. 12D</figref> and <figref idref="f0020">FIG. 13D</figref>. When the user releases the push button 20b, the rotation shaft 64b would move upwards according to the rebound from the writing element spring 35 and the auxiliary spring 80b. Therefore, each guiding protrusion 644b re-enters the each guiding groove 764b. Please refer to the description of the first embodiment for more details of the interaction among each component.

0054The major difference between the third embodiment and the first embodiment is thus: in the third embodiment, three rotation barrels 70b can respectively rotate every time when the push button 20b has been pushed, such that the window 16 can randomly display different patterns 74b when these three rotation barrels 70b stop, as shown in <figref idref="f0021">FIG. 14A and FIG. 14B</figref>. Further, because the rotation shaft receiver 62b is combined with the clip 11b, one component of the press-action writing instrument 1b can be eliminated and the total number of parts thus reduced.

0055Please note that the number of the rotation barrels 70b can be varied. For example, if there are two rotation barrels 70b, then the rotation shaft 64b has two pairs of guiding protrusions 644b accordingly; if there is only one rotation barrel 70b, then the rotation shaft 64b only needs to have one pair of guiding protrusions 644b, which is the same as the implementation of the first embodiment. Furthermore, in order to increase the entertainment value, the press-action writing instrument can be installed with electronic components capable of generating sounds or light so as to provide more amusement when the push button has been pushed.

0056The most novel portion of the present invention is the rotation module 50, which can be installed in a narrow and elongated barrel. Therefore, the rotation module 50 can be installed not only in a writing instrument but also in any elongated object. Please refer to <figref idref="f0022">FIG. 15</figref> and <figref idref="f0023">FIG. 15A</figref> for a press-action device 1c according to the fourth embodiment. The press-action device 1c comprises a holding barrel 10c with the window 16c, a push button 20c, a rotation module 50c, and an auxiliary spring 80c. The rotation module 50c also comprises a driving part 60c and the rotation barrel 70c. Please refer the first and the third embodiments for the function of the rotation module 50c. Please note that the auxiliary spring 80c connected with the rotation module 50c is a necessary component for returning the push button 20 back to its original position (the third stage mentioned in the above embodiments) since there is no the writing element spring 35 like those the first and the third embodiments. The press-action device 1c can be a toy, an ornament/accessory attached to a key-chain, a necklace, a cell phone, etc.

0057Please refer to <figref idref="f0024">FIG. 16 and FIG. 16A</figref> for a press-action device 1d according to the fifth embodiment. The major difference between the press-action device 1c and press-action device 1d is that the rotation module 50d comprises three tandem-arranged rotation barrels 70d similar to those in the third embodiment, the press-action writing instrument 1b. Similarly, the press-action device 1d also comprises a holding barrel 10d with a window 16d, a push button 20d, the rotation module 50d, and an auxiliary spring 80d connected with the rotation module 50d. The rotation module 50d also comprises a driving part 60d and three tandem-arranged rotation barrels 70d.

0058The press-action device 1c, 1d also has an initial stage, a first stage, a second stage and a third stage. For details of the components of the rotation module 50c, 50d, such as the rotation shaft receiver, the rotation shaft, the guiding protrusions, the following part, and the guiding block, please refer to the first and the third embodiments. Since the function of the push button 20c, 20d and the rotation module 50c, 50d has been described in the first and the third embodiments, there is no need to describe the structure in detail.

0059Although the present invention has been explained in relation to its preferred embodiments, it is to be understood that many other possible modifications and variations can be made without departing from the spirit and scope of the invention as hereinafter claimed. For example, if the press-action writing instrument 1, 1b of the present invention does not have the auxiliary spring 80, 80b, then when the writing end 32 of the writing element 30 protrudes from the holding barrel 10, the push button 20, 20b would move only slightly upwards (but not completely return to the top as shown in <figref idref="f0008">FIG. 6</figref> and <figref idref="f0020">FIG. 13D</figref>). Therefore, when the user pushes the push button 20, 20b again, the rotation barrel 70, 70b can still rotate, but with a slightly worse performance. Furthermore, in the aforementioned embodiments, the window 16, 16a occupies only a small part of the holding barrel 10, but the size of the window can be enlarged as well. For example, the window can completely cover a certain section of the holding barrel; alternatively, the holding barrel can be made of transparent or translucent materials to turn the whole holding barrel into the window. Please note that there should be at least one transparent or translucent part of the holding barrel so that the patterns printed on the rotation barrel can be seen through the window.