Key input device

[Detailed Description of the Invention]

"Field of the Invention] Especially as for this invention, displays for indication, such as a liquid-crystal-display machine, are stored by the key-top portion about a key input device, The key shows what input and it is related with the key input device which can separate a key-top portion in a key input device as it shown the present state of apparatus or how it is.

[Description of the Prior Art] If it is in what is called key input devices, such as a key switch of this kind of variable display type, conventionally, a lamp, a light emitting diode, etc. are laid under that key-top, and what displays the shift state of a keyboard, etc. by that lighting is known as that display information. These days, displays for indication, such as luminescence diode array and a liquid-crystal-display machine, are stored, and it is character 9 specific figure. There are some which can display other information. This is a key input device which has a comparatively big key-top, and it is used for them by an operation panel and the keyboard, arranging it as one piece or two or more keys. And generally each built-in display for indication is provided with the Do not matrix-like electrode, and displays the target information by the selection drive of the A pot.

[Problem(s) to be Solved] Many wiring is needed in order to transmit the control information for driving A pot alternatively, if it is in the key input device which has information display functions, such as such a character. Then, whether what we do with many wiring to the display for indication in the key-top side poses an important problem from the substrate side, such as a keyboard. This wiring is at such a thing, although wired, for example using a flat code (wire rod), a flexible cable, etc. in many cases, When a key is pressed at the human power time and the key itself is moved under" Yu, it acts in the direction which prevents movement on occurring [ uneasy stress ]-by the above-mentioned wiring" -, and there is a problem of the flexibility being restricted and also producing loose connection in the display-for-indication side. And when a key is arranged adjacently, it has a bad influence on an adjoining key input device, the wiring itself is cracked, and there is a danger that key human power operation of tens of thousands of times, with 1-1 cannot be borne. moreover -- in such a case, a key input device and a keyboard are combined by wiring -- the inside of one -- What -- it becomes a thing, the individuality of a key input device is spoiled, and the flexibility of wiring is also restricted. Moreover, a manufacturing process does not become simple but a manufacturing cost becomes high. It is although the failure, the exchange for being poor, etc. are needed for the portion of a key-top from the relation which stores a display for indication, Since the key input device and the substrate are combined with the wire rod if it is in the above mentioned, each independency of a key input device is spoiled at the time of maintenance or check, and there is a fault that a maintenance is difficult. The object of the present invention is as follows. Be made in view of a problem of such conventional technology, etc., and solve such a problem. Wiring secures the independency of each easy key and provide a key input device which the attachment and a maintenance tend to carry out.

means Co for solving [problem -- the means in the key input device of this invention for achieving such an object, The 1st terminal group that consists of a plurality of terminals which are provided in this key-top part [ which has a display for indication ], and key-top part side, are connected to a display for indication, and transmit a signal to this, The 2nd terminal group that is connected to external wiring, or is used as the terminal, and consists of a terminal corresponding to the number of terminals of the 1st terminal group, It has the conductive spring member which carries out the electrical link of between each terminal of the 1st terminal group and the 2nd terminal group, and is connected by the contact state which at least 1 side of a spring member, the 1st terminal group, and the 2nd terminal group can separate, and a spring member is in a compression state.

[operation Co Thus, it is provided in the key base side which Offspring the pin with which the wiring by the side of a substrate is presented, for example, and the spring member of a compression state is infixed for between the contact terminal by the side of the external derivation terminal connected to the above-mentioned pin, and the contact terminals by the side of a key-top, Since it is made to make contact connection of these at least 1 side, a key-top portion and the key base side are separable. And in an assembly state, it is possible to be able to guarantee connection to the pin by the side of substrate wiring, even if it moves up and down the key-top side, and to deal with a key-top portion as independent parts. By taking the composition like the above, contact terminals do not generate unnecessary stress to up-and-down movement of a key from the relation which touches via a spring member, and the flexibility is not restricted at the key human power time. And while the danger that the loose connection in the display-for-indication side will occur decreases, it is not necessary to become independent [ To give and the wiring itself ] of the key base side about a bad influence at adjoining key input device delta, and to damage the key-top side. As a result, it can be equal also to key human power operation of many number of times, and can deal with a key input device and a keyboard individually. Flexibility becomes simple [ increase and a manufacturing process ] at wiring, failure of the display for indication stored into the key-top portion, the exchange for being poor, etc. are easy, and a maintenance tends to carry out them.

[example Co Hereinafter, one example of this invention is described in detail using a drawing. Drawing 1 is an exploded perspective view of the key input device to which this invention is applied, and Drawing 2 (a) is an outline figure of a key input device when the sectional view of a depression state of a key-top and Drawing 3 (a), (b), and (C) change the sectional view in that assembly state to a board spring and Drawing 2 (b) changes that spring member to it. In each of these figures, the same numerals show an equivalent thing. * Drawings 1 and 2 (1 is in aL (b)) It is a key input device, and it has key-top part 3 which fits in and moves up and down from the outside at key base 2 and this key base 2, and liquid crystal display part 5 stored by key-top part 3, is constituted, and is carried in the substrate of a keyboard, etc. Key-top part 3 consists of key-top 4a and window glass part 4b which is key Tomp 4a" and which were embedded in one in part, and liquid crystal display part 5 is stored at the F side of window glass part 4b. As for liquid crystal display part 5, it comprises liquid-crystal-display machine 51, zebra connector 52.52 and LED unit 53, and IC drive circuit unit 54, and zebra connector 52 is, Each output point-of-contact terminal of IC drive circuit unit 54 and each contact terminal of liquid-crystal-display machine 51 are connected, and the drive output signal from IC drive circuit unit 54 is applied to liquid-crystal-display machine 51. LED unit 53 is connected to IC drive circuit unit 54 via terminal pins 53a and 53b, and it plays the role of the back light which irradiates with light from the rear. IC drive circuit unit 54 consists of IC circuit part 54a which drives a liquid-crystal-display machine, and substrate 54b in which it is carried, and is a contact terminal by the side of the input of IC circuit part 54a, It is contact terminal 5 a+ to the back side (refer to the 2nd figure) of substrate 54b. It is provided as .., and 5g, .., 5j, and it corresponds to eight signal wires and current supply lines, and grand lines, a total of ten pieces distribute, and the number is arranged mostly at circle shape. And corresponding to the position of each ten contact terminals by the side of this back, ten distribute and copper coil springs 6 are arranged so that it may see to Drawing 1. Ten these coil spring e, e, e, -.. Penetration hole 7 a+ to which intermediate block 7 corresponds to Drawing 2 (a) and (b) showing an assembly state so that it may see It is inserted in phi-, 7 g, - fist, and 7j, and is each contact terminal 2 a+ of key base 2. -phi, and 2g, .., 2j are contacted, respectively. When key-top 4a is pushed so that it may hit by the operation block of switch 22 formed on key base 2 and may see to Drawing 2 (b), intermediate block 7 descends and contacts Into between points of contact of switch 22. Projected rim 71.72 counters a both-sides wall, and the side of intermediate block 7 is provided with it, and in the state of an assembly, it inserts in side wall slot 11.12 inside key-top 4a, respectively, and is held so that it may see to Drawing 2. Contact terminal 2a provided in key base 2. .., and 2g, .., 2j are contact end'5 a. .. Having countered 5 g, salary -, and 5j, switch 22 is mostly formed in the position of"-Therefore 21 in the central part of Placed and"-Therefore 21 at circle shape. And guide walls 23 and 24 contacted and guided inside key-top 4a are formed in the side. Nail 13.14 projected inside so that it might see to Drawing 2 countered, the bottom tip part of key-top 4a was established in the position at both sides, and these nails 13.14 are projected as a projected rim in the shape of a straight line in the direction of drawing order over the wall surface. The stage is formed along with the inner side, nail 13.14 engages with the part 26.27 with the stage in the state of an assembly, and the rear of guide walls 23 and 24 of key base 2 carries out the locomotive faculty made the method of L by coil spring 6 Inhibition+1. As a result, 6 is contact terminal 5a of the upper and lower sides by a compression state in a ten coil case. .., 5 g .. 5j and contact terminal 2 a+ contacting corresponding to each with .., and 2g, .., 2j -- a key -- in the state where tomb 4a is not pushed, between these is certainly held to switch-on. In particular, each contact state can be maintained in this example, without influencing each mutually, even if a key-top moves under L since each connection point of contact is connected by the independent coil spring. Since the coil spring is distributed, even if it returns like the usual key switch and there is no spring, balance is good and it can perform northing movement of a key-top smoothly. Next, the method of an assembly of this key input device is explained. First, liquid crystal display part 5 which comprises liquid-crystal-display machine 51, zebra connector 52 and LED unit 53, and IC drive circuit unit 54 is assembled independently, It puts in to the direction of a bottom and inserts so that the top and bottom of key Tomp part 3 may be made reverse, liquid crystal display part 5 may be inserted in the inside of key-top 4a and window glass part 4b may be touched. It is fixed by it being inserted in the back exceeding projection 15.IE3 by which liquid crystal display part 5 was provided in key-top 4a by this, and being held by projection 15.16. Next, intermediate block 7 is inserted in key-top 4a, and the projected rim 71.72 fits into side wall slot 11.12 of key-top 4a, and is stopped. Ten coil springs 6 are penetration holes 7a in this state. .. They are assembly To be to the state where Wear 1 is taken for 7 g, -phi, and 7j, and it is finally inserted exceeding nail 13.14 which key base 2 projected, pushing coil spring 6, and sees to Drawing 2 (a). At this example, the both sides of coil spring 6 are contact terminals 2a. .., 2 g, -phi, 2j and contact terminal 5 a+ Although it is .. and a contact state separable into 5g, .., 5j, coil spring 6 may adhere to the one of contact terminal side. As the method of adherence, fixation may be sufficient with Handa, and the pin thicker than the diameter of a coil is implanted in the substrate side, and it may carry out forcible insertion of the end of a coil spring, and may fix to it. Drawing 3 (a) is in board springs 8 and 8 so that it may be an example using two board springs which were changed to coil spring 6, and have been countered and arranged and may see to the figure (b), The contact terminal part which has given wiring 81, 82, 83, and 84.85 of five to the surface via insulator 86, respectively, or pasted board spring 8 as flexible cable 86, and was provided in these drawing tip side is contact terminal 2a. .., 2g. - phi, 2j, and contact terminals 5a, 11, and 5g, *-. It is in contact with 5j. this case -- contact terminal 2 a+ .., and 2g, .., 2j and contact terminal 5 a+ .., 5 g, -phi, and 5j, Corresponding to the contact terminal of each wiring position of board spring 8, it is positioned, respectively, and the penetration hole of intermediate block 7 has become two of slots 74.75 of the section rectangle deeply cut by the box form. Board spring 8 is contact terminal 2a. .., 2 g, **, 2j and contact terminal 5 at ""+5 g+ Balance with the form which becomes symmetrical with mutual by C type is good so that it may see to Drawing 3 (C) between "- and 5j, and it dedicates to slot 74.75, respectively, and is carried out. Thus, by distributing to two and arranging a board spring, the same key touch feel as the conventional key switch can be given. Although the return spring [ as opposed to / although explained above / a key-top at fin examples ] is omitted and in particular this is not made into Must-have shell, it can return for balance, a coil spring may be inserted, and contact terminal contact spring power can be weakened in this case. Although the coil spring is inserted by the compression state, it may realize by prudence of a key-top and it is not necessary to necessarily make the compression state compulsive compression. In the first example, although the coil spring is used, each coil spring may be transposed to its Leave board spring. A spring is not limited to metal things. In an example, although the LED unit is inserted as a back light, a back light is not necessarily required. A display for indication is not limited to a liquid-crystal-display machine, can use various kinds of displays for indication, such as LED, and is not limited to a Do not matrix type thing. Such a key input device may be arranged in the shape of a keyboard, and may be used with sponge dough on an operation panel. A switch body is not limited to an example by the thing of non-Structure.

Effect Co of [invention If it is in this invention so that he can understand from the above explanation, For example, it is provided in the key base side which has a pin with which the wiring by the side of a substrate is presented, and the spring member of a compression state is infixed for between the contact terminal by the side of the external derivation terminal connected to the above-mentioned pin, and the contact terminals by the side of a key-top, Since it is made to make contact connection of these at least 1 side, a key-top portion and the key base side are separable. And in an assembly state, But is possible in if connection to the pin by the side of substrate wiring can be guaranteed and a key-top portion is dealt with as independent parts, even if it moves up and down the key-top side. By taking the composition like the above, contact terminals do not generate unnecessary stress to 1 need movement of a key from the relation which touches via a spring member, and the flexibility is not restricted at the key human power time. And while the danger that the loose connection in the display side will occur decreases, it is not necessary to become independent [ To give and the wiring itself ] of the key base side about a bad influence at an adjoining key input device, and to damage the key-top side. As a result, it can be equal also to key human power operation of many number of times, and can deal with a key input device and a keyboard individually. Flexibility becomes simple [ increase and a manufacturing process ] at wiring, failure of the display for indication stored into the key-top portion, the exchange for being poor, etc. are easy, and a maintenance tends to carry out them.

[Brief Description of the Drawings]

The exploded perspective view of the key input device in which Drawing 1 applied this invention, and Drawing 2 (a) are outline figures of a key input device when the sectional view of a depression state of a key-top and Drawing 3 (a), (b), and (c) change the sectional view in that assembly state to a board spring and Drawing 2 (b) changes that spring member to it. 1 ... key input device, 2 ... a key base and 2at 2gt 2L 5aw 5g, 5 j ... contact terminal, 3 ... key-top part, 4 a ... a key-top and 4b ...... A window glass capital, 5 [ 7j ... Penetration hole, ] ... A Liji display part, 6 ... Coil spring 7 ... Intermediate block % 7at 7g+ 8 ... board spring, 11.12 ... side wall slot, 13.14 ... nail, 15.16 ... projection, 22.23 ... edge with the stage, 51 ... liquid-crystal-display machine, 52 ... zebra connector, 53 ... LED unit, 54 ... IC drive circuit unit, 71.72 ... projected rim.