Electronic apparatus

The present invention relates to an electronic device having a cable, and more particularly to a structure for grounding a coating of the cable.

For example, an electronic device such as a portable computer includes a cable for connecting various modules mounted in a housing. There are various types of cables provided in electronic devices, and some of them have a conductive coating for suppressing the generation of electromagnetic waves, for example.

On the other hand, an electrical component box provided with a harness fixing member is provided (see, for example, Patent Document 1). The plurality of harness fixing members described in Patent Document 1 are projected from the side plates of the electrical component box. The harness fixing members are arranged in a staggered pattern, and the harness cables are sandwiched in a meandering state.<patcit num="1"><text>Japanese Unexamined Patent Publication No. 2003-124649</text></patcit>

<p> For example, when grounding the cable coating to the ground layer of the housing, the cable may be pressed against the ground layer using, for example, sheet metal, or a ground wire may be separately attached to the cable coating and this ground wire may be connected to the ground layer. To do. That is, when grounding the coating of the cable, it is necessary to newly provide a separate member for grounding in the housing. For example, even if the harness fixing member described in Patent Document 1 is used, a separate member for grounding is required to ground the coating of the cable.</p><p> An object of the present invention is to obtain an electronic device having a structure for grounding a cable coating without providing a separate member attached to a housing.</p>

<p> In order to achieve the above object, the electronic device according to one embodiment of the present invention is<u style="single">First</u>With the housing<u style="single">A second housing, a hinge portion that rotatably connects the first housing and the second housing, and a hinge portion.</u>the above<u style="single">Second</u>Housed in a housing<u style="single">Ta</u>Module and<u style="single">It is electrically connected to the module, extends through the hinge portion to the second housing and the first housing, and at the same time.</u>Has a conductive coating<u style="single">did</u>Cable and above<u style="single">Second</u>Provided inside the housing<u style="single">Ta</u>With the ground layer<u style="single">Provided at the end of the second housing connected to the hinge portion,</u>the above<u style="single">Second</u>Protruding from the inner wall of the housing<u style="single">did</u>Multiple protrusions, at least one of which<u style="single">Is on the side</u>The surface is electrically connected to the ground layer<u style="single">At the same time, it came into contact with the conductive coating of the above cable.</u>Has a conductor layer and<u style="single">The</u>With protrusions<u style="single">other</u>Wired between the protrusions<u style="single">Ta</u>Hold the above cable<u style="single">did</u>Equipped with multiple protrusions<u style="single">did</u>。</p>

<p> According to this configuration, the coating of the cable is grounded through the conductor layer of the protrusion. As a result, the coating of the cable is grounded without providing a separate member attached to the housing.</p>

Hereinafter, embodiments of the present invention will be described with reference to drawings applied to a portable computer. 1 to 3 disclose a portable computer 1 as an electronic device according to the first embodiment of the present invention. As shown in FIG. 1, the portable computer 1 includes a main body 2, a display unit 3, and a pair of hinge portions 4 and 4 provided between the main body 2 and the display unit 3.

As shown in FIG. 1, the main body 2 includes a main body base 6 and a main body cover 7. The main body base 6 is an example of the first housing member. The main body cover 7 is an example of the second housing member. The main body cover 7 is combined with the main body base 6 from above. As a result, the main body 2 includes a box-shaped housing 8 having an upper wall 8a, a lower wall 8b, and a side wall 8c. The housing 8 houses the circuit board 9. The circuit board 9 is an example of a module.

A first ground layer 10 is provided on the inner wall 8ba of the housing lower wall 8b. The first ground layer 10 is formed by, for example, applying or plating a conductive material.

The display unit 3 includes a housing base 12 and a housing cover 13. The housing base 12 is an example of the first housing member. The housing cover 13 is an example of a second housing member. The housing cover 13 is combined with the housing base 12. Thereby, the display unit 3 includes a box-shaped display housing 14 having a front wall 14a, a rear wall 14b, and a side wall 14c.

The display housing 14 houses the liquid crystal display module 15. The liquid crystal display module 15 has a display screen 15a. The display screen 15a is exposed to the outside of the display housing 14 through the opening 14d of the front wall 14a of the display housing.

As shown in FIG. 1, a second ground layer 17 is provided on the inner wall 14ba of the display housing rear wall 14b. The second ground layer 17 is formed by, for example, applying or plating a conductive material. However, the first and second ground layers 10 and 17 are not limited to coating or plating, and may be formed by attaching a thinly stretched metal foil such as aluminum or copper.

The hinge portion 4 is provided at the rear end portion of the main body 2 and supports the display unit 3. As shown in FIG. 2, the hinge portion 4 has a hinge mechanism 18 that can rotate inside. Therefore, the display unit 3 can rotate between a closed position where the upper wall 8a of the main body 2 is tilted so as to cover it from above and an open position where the upper wall 8a stands up so as to be exposed.

The portable computer 1 has a harness 21 extending from the main body 2 to the display unit 3. That is, the harness 21 extends from the inside of the display housing 14 through the hinge portion 4 and into the housing 8. Harness 21 is an example of a cable. As shown in FIG. 3, one end of the harness 21 has a first connector 22. The harness 21 is electrically connected to the liquid crystal display module 15 via the first connector 22. As shown in FIG. 1, the other end of the harness 21 has a second connector 23. The harness 21 is electrically connected to the circuit board 9 via the second connector 23.

As shown in FIGS. 2 and 3, the harness 21 has an electric wire portion 25, a coating shield 26, and an insulating film 27. The electric wire portion 25 is formed by bundling, for example, power lines and signal lines. The coating shield 26 is formed of a conductive coating and surrounds the electric wire portion 25. An example of the coating shield 26 is, for example, a conductive cloth tape. However, the coating shield 26 is not limited to the cloth tape, and for example, a conductive tube may be attached.

An example of the coating shield 26 is a coating for EMI (Electro-Magnetic Interface) countermeasures, but a coating shield provided for other purposes may also be used. The insulating film 27 further surrounds the outer periphery of the film shield 26. An example of the insulating film 27 is an insulating tape.

Next, the protrusion 31 provided on the display unit 3 will be described in detail. Since the protrusion provided on the main body 2 has the same configuration and function as the protrusion 31 provided on the display unit 3, the same reference numerals are given and the description thereof will be omitted.

As shown in FIG. 2, the protrusion 31 is provided between the liquid crystal display module 15 and the hinge portion 4 in the path of the harness 21. The protrusions 31 have first to third protrusions 32, 33, 34 protruding from the inner wall 14ba of the rear wall 14b, respectively. The first to third protrusions 32 to 34 are formed in a cylindrical shape integrally with the housing base 12.

The first protrusion 32, the second protrusion 33, and the third protrusion 34 are arranged, for example, in two rows so as to be staggered from each other. That is, the first to third protrusions 32 to 34 are arranged in a staggered shape. An example of the gap between the first protrusion 32 and the second protrusion 33 is substantially the same as the outer diameter of the coating shield 26 of the harness 21. An example of the gap between the third protrusion 34 and the second protrusion 33 is substantially the same as the outer diameter of the coating shield 26 of the harness 21.

As shown in FIGS. 2 and 3, each of the first to third protrusions 32, 33, 34 has a conductor layer 35 on its side surface S (that is, its peripheral surface). The conductor layer 35 is formed by plating integrally with the second ground layer 17, for example, and is electrically connected to the second ground layer 17. However, the conductor layer 35 may be formed separately from the second ground layer 17 as long as it is electrically connected to the second ground layer 17.

At least one of the first to third protrusions 32, 33, 34 may have the conductor layer 35. Instead of having the conductor layer 35 on the surface of the first to third protrusions 32, 33, 34, the protrusions themselves may be formed of a conductor material such as metal.

As shown in FIG. 2, the harness 21 at the portion passing through the protrusion 31 does not have the insulating film 27, and the film shield 26 is exposed. The harness 21 extending from the liquid crystal display module 15 has its body hooked on the first to third protrusions 32,33,34, and is routed around the first to third protrusions 32,33,34 as a guide. There is.

The harness 21 is attached so as to pass between the first protrusion 32 and the second protrusion 33, and further pass between the third protrusion 34 and the second protrusion 33. The harness 21 is sandwiched between the first and second protrusions 32,33 and between the second and third protrusions 33,34, and its position is fixed. The harness 21 is supported in a meandering state by the first to third protrusions 32, 33, 34 formed in a staggered manner. The harness 21 extending into the hinge portion 4 is slightly bent to have play.

Next, the operation of the portable computer 1 will be described. When the harness 21 is sandwiched by the first to third protrusions 32,33,34, the coating shield 26 of the harness 21 comes into contact with the conductor layer 35 of the first to third protrusions 32,33,34. The coating shield 26 is grounded to a second ground layer 17 via the conductor layer 35. By grounding the coating shield 26, the generation of electromagnetic waves in the portable computer 1 is suppressed.

On the other hand, the coating shield 26 of the harness 21 extending in the main body 2 is sandwiched by the protrusions 31 provided on the main body housing 8 and is grounded to the first ground layer 10. That is, the first and second ground layers 10 and 17 conduct with each other via the coating shield 26 of the harness 21, and their respective potentials become the same. As a result, the generation of disturbing electromagnetic waves due to the potential difference between the two ground layers 10 and 17 is suppressed.

According to such a portable computer 1, the coating film of the harness 21 can be grounded without providing a separate member attached to the housings 8 and 14. That is, the coating shield 26 is grounded by providing the protrusions 32, 33, 34 having the conductor layer 35 on the side surface S and entwining the harness 21 with the protrusions 32, 33, 34 for wiring. That is, there is no need for a separate member that presses the harness 21 against the second ground layer 17, or a ground wire that is separately attached to the coating shield 26.

Therefore, the ground structure can be achieved in a smaller space than in the past, and the portable computer 1 can be miniaturized. Further, since a separate member is not required, it is possible to obtain a portable computer 1 with reduced cost. Grounding of the coating shield 26 is achieved by sandwiching the harness 21 between the protrusions 32, 33, 34. That is, the labor of attaching another member is omitted, and the portable computer 1 with improved assembly workability can be obtained.

In particular, when the first to third protrusions 32, 33, 34 meander and support the harness 21, the harness 21 is more firmly held between the protrusions and the coating shield 26 is reliably grounded. At least one protrusion having the conductor layer 35 is sufficient, but by having the plurality of protrusions having the conductor layer 35, the ground connection is achieved with a lower electric resistance value.

The shape of the first to third protrusions 32, 33, 34 is not limited to a cylindrical shape, and may be, for example, a wall shape along the harness 21. However, if the surface of the protrusion that contacts the harness 21 is formed in a curved shape, the contact area between the coating shield 26 and the conductor layer 35 increases, and ground connection is achieved with a lower electrical resistance value.

The number of protrusions is not limited to three, and may be two or four or more. The arrangement of the protrusions is not limited to the staggered shape, and can be appropriately selected.

Next, the portable computer 41 as an electronic device according to the second embodiment of the present invention will be described with reference to FIG. The configurations having the same functions as the portable computer 1 according to the first embodiment are designated by the same reference numerals and the description thereof will be omitted. The portable computer 41 has a protrusion 42. The first and third protrusions 32 and 34 of the protrusion 42 each have a screw hole 43 that opens into the crown of the protrusion 42. The screw hole 43 is an example of an engaging hole.

The housing cover 13 of the portable computer 41 has first and second bosses 44,45. The first boss 44 extends from the front wall 14a toward the first protrusion 32 and faces the first protrusion 32. The second boss 45 extends from the front wall 14a toward the third protrusion 34 and faces the third protrusion 34.

The first and second bosses 44 and 45 each have a hole 46 that opens to the outside of the housing 8 and communicates with the screw hole 43. With the housing cover 13 combined with the housing base 12, screws 47 are inserted into the holes 46 of the first and second bosses 44, 45. The screw 47 is an example of a fixing member. The tip of the screw 47 engages the screw hole 43. As a result, the housing cover 13 and the housing base 12 are fixed to each other. In other words, the first and third protrusions 32 and 34 are bosses for fixing the display housing 14, and the harness 21 is grounded by using these bosses.

According to such a portable computer 41, since the coating shield 26 of the harness 21 is grounded via the conductor layer 35 of the protrusions 32, 33, 34, it is not necessary to provide a separate member for grounding. As a result, it is possible to obtain a portable computer 41 that is miniaturized, reduced in cost, and improved in assembly workability.

In particular, as in the portable computer 41 according to the present embodiment, by using the first and third protrusions 32 and 34 as bosses for screwing, the space required by the ground structure can be omitted or reduced, and the portable computer can be used. It is possible to further reduce the cost of 41.

In the present embodiment, the two protrusions 32 and 34 are the bosses for screwing, but one protrusion may be used as the boss for screwing, or all the protrusions may be used together.

Next, the portable computer 51 as an electronic device according to the third embodiment of the present invention will be described with reference to FIGS. 5 and 6. The configurations having the same functions as the portable computer 1 according to the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

The portable computer 51 has a protrusion 52. As shown in FIGS. 5 and 6, the protrusion 52 is provided in the path of the harness 21. Each of the protrusions 52 has first to third protrusions 53, 54, 55 protruding from the inner wall 14ba of the rear wall 14b.

The first protrusion 53, the second protrusion 54, and the third protrusion 55 are arranged, for example, in two rows so as to be staggered from each other. That is, the first to third protrusions 53 to 55 are arranged in a staggered shape. An example of the gap between the first protrusion 53 and the second protrusion 54 is larger than the outer diameter of the coating shield 26 of the harness 21. An example of the gap between the third protrusion 55 and the second protrusion 54 is larger than the outer diameter of the coating shield 26 of the harness 21. The first to third protrusions 53, 54, 55 each have a conductor layer 35 on their side surface S.

As shown in FIG. 5, the left and right side surfaces of the body portion of the harness 21 are alternately hooked on the first to third protrusions 53,54,55, and the first to third protrusions 53,54,55 are hooked on the first to third protrusions 53,54,55. It is drawn around as a guide. The harness 21 is routed along the side surface S of each of the protrusions 53, 54, 55, and extends around the protrusions 53, 54, 55 so as to be wrapped around the respective side surfaces S.

More specifically, the first to third protrusions 53, 54, 55 are arranged in two rows on the left and right in FIG. The harness 21 extends along the right side surface of the first and third protrusions 53, 55 located in the right column and along the left side surface of the second protrusion 54 located in the left column. That is, the harness 21 extends so as to follow the side surface located at the outer peripheral portion of the protrusion 52. The harness 21 is maintained in a meandering state by alternately supporting the left and right side surfaces by the first to third protrusions 53, 54, 55 formed in a staggered manner.

The harness 21 follows the left side surface of the protrusion located in the right row and the right side surface of the protrusion located in the left row, that is, the side surface located at the inner peripheral portion of the protrusion 52 as shown in FIG. It may be extended.

The shape of the first to third protrusions 53, 54, 55 is not limited to a cylindrical shape, and may be, for example, a wall shape along the harness 21. However, if the surface of the protrusion in contact with the harness 21 is formed in a curved shape, the ground connection is achieved with a lower electric resistance value.

Next, the operation of the portable computer 51 will be described. The harness 21 is not fixed by the first to third protrusions 53,54,55 because the gap between the first to third protrusions 53,54,55 is thicker than the harness 21. Here, since the harness 21 extends into the main body 2 through the hinge portion 4, it extends or bends as the display unit 3 opens and closes. The position of the harness 21 moves slightly as the display unit 3 opens and closes.

However, since the left and right side surfaces of the harness 21 are entwined so as to be in contact with any of the protrusions 53, 54, 55, the harness 21 remains in contact with at least one protrusion even if its position is slightly displaced. By keeping the harness 21 in contact with at least one of the protrusions 53, 54, 55, the coating shield 26 is always grounded to the second ground layer 17.

According to such a portable computer 51, since the coating shield 26 of the harness 21 is grounded via the conductor layers 35 of the protrusions 53, 54, 55, it is not necessary to provide a separate member for grounding. Grounding the coating shield 26 is achieved by entwining the harness 21 with the protrusions 53, 54, 55. As a result, it is possible to obtain a portable computer 51 that is miniaturized, reduced in cost, and improved in assembly workability.

The number of protrusions is not limited to three, and may be two or four or more. The arrangement of protrusions is not limited to the staggered shape.

Next, the portable computer 61 as an electronic device according to the fourth embodiment of the present invention will be described with reference to FIGS. 7 and 8. The configurations having the same functions as the portable computers 1,51 according to the first and third embodiments are designated by the same reference numerals and the description thereof will be omitted.

The portable computer 61 has a protrusion 62. The first to third protrusions 53, 54, 55 of the protrusion 62 each have a protrusion body 63 protruding from the housing base 12 and an extension portion 64 extending parallel to the inner wall 14ba from the protrusion end of the protrusion body 63. That is, the first to third protrusions 52, 53, 54 are formed in the shape of claws. The extending portion 64 extends from the protrusion main body 63 in a direction covering the harness 21.

According to such a portable computer 61, since the coating shield 26 of the harness 21 is grounded via the conductor layer 35 of the protrusions 53, 54, 55, it is not necessary to provide a separate member for grounding. As a result, it is possible to obtain a portable computer 61 that is miniaturized, reduced in cost, and improved in assembly workability.

In particular, when the first to third protrusions 53, 54, 55 are formed in a claw shape, the harness 21 is less likely to come off from the protrusion 62. As a result, the grounding of the coating shield 26 can be achieved more reliably.

Next, the portable computer 71 as an electronic device according to the fifth embodiment of the present invention will be described with reference to FIG. The configurations having the same functions as the portable computers 1, 41, 51 according to the first to third embodiments are designated by the same reference numerals and the description thereof will be omitted.

The portable computer 71 has a protrusion 72. The first and third protrusions 53 and 55 of the protrusion 72 each have a screw hole 43 on the crown. In other words, the first and third protrusions 53 and 55 are bosses for fixing the display housing 14, and the harness 21 is grounded by also serving as these bosses.

According to such a portable computer 71, since the coating shield 26 of the harness 21 is grounded via the conductor layer 35 of the protrusions 53, 54, 55, it is not necessary to provide a separate member for grounding. Further, as in the second embodiment, it is possible to obtain the portable computer 71 which is further miniaturized, reduced in cost, and improved in assembly workability.

Although the portable computers 1,41,51,61,71 according to the first to fifth embodiments have been described above, the present invention is not limited thereto. For example, the shapes of the first to third protrusions 32 to 34, 53 to 55 are not particularly limited, and an elliptical shape, a polygonal shape, or the like can be appropriately selected and used. The coating shield 26 does not have to be a conductor coating that makes the first and second ground layers 10 and 17 have the same potential, and may be provided for other purposes.

In the portable computers 41,71 according to the second and fifth embodiments, the protrusions 32, 34, 53, 55 are provided with the engaging holes 43, and the bosses 44, 45 are provided with the holes 46. Instead, the protrusions 32, 34, 53, 55 may be provided with holes 46, and the bosses 44, 45 may be provided with engagement holes 43. In this case, the screw 47 is engaged with the engaging hole 43 of the housing cover 13 through the hole 46 provided in the housing base 12.

The harness 21 is not limited to the liquid crystal display module 15, and may be, for example, a harness 21 for connecting a plurality of circuit boards, regardless of the type. The electronic device to which the embodiment of the present invention is applicable is not limited to a portable computer, but can be applied to any electronic device such as a mobile phone, a digital camera, a video camera, or a personal digital assistant.

<figref num="1">The perspective view of the portable computer which concerns on 1st Embodiment of this invention.</figref><figref num="2">Sectional drawing of the protrusion shown in FIG.</figref><figref num="3">Sectional view of the protrusion shown in FIG. 2 along the F3-F3 line.</figref><figref num="4">Sectional drawing of the portable computer which concerns on 2nd Embodiment of this invention.</figref><figref num="5">Sectional drawing of the portable computer which concerns on 3rd Embodiment of this invention.</figref><figref num="6">Sectional view of the protrusion shown in FIG. 5 along line F6-F6.</figref><figref num="7">Sectional drawing of the portable computer which concerns on 4th Embodiment of this invention.</figref><figref num="8">Sectional drawing along the F8-F8 line of the protrusion shown in FIG.</figref><figref num="9">Sectional drawing of the portable computer which concerns on 5th Embodiment of this invention.</figref>

Code description

1 ... Portable computer, 2 ... Body, 3 ... Display unit, 12 ... Housing base, 13 ... Housing cover, 14 ... Display housing, 14ba ... Inner wall, 15.. Liquid crystal display module, 17 ... 2nd ground layer, 21 ... harness, 26 ... coating shield, 31 ... protrusions, 32 ~ 34 protrusions, 35 ... conductor layer, 41 .. .Portable computer, 42 ... protrusion, 43 ... screw hole, 44 ... first boss, 45 ... second boss, 47 ... screw, 51 ... portable computer, 52 ... protrusions, 53 ~ 55 ... protrusions.