JP6536091B2 - Electronics - Google Patents

Description

  The present invention relates to an electronic device.

  In recent years, a conductor member made of metal is often used as an exterior in electronic devices. Such conductor members are subjected to surface processing such as blasting or hairline treatment to improve the appearance of the electronic device. Further, the inner side surface of the conductor member and the unit holding member for holding a unit such as a printed circuit board on which the electronic component is mounted are arranged in an overlapping manner.

  It is preferable that the unit in such an electronic device be grounded in order to reduce the influence of radio noise and static electricity. Therefore, for example, grounding the unit is performed by electrically connecting the ground terminal of the electronic component mounted on the unit and the conductor member. However, the unit holding member for holding the unit is often formed of a resin having low conductivity. Therefore, in order to electrically connect the unit and the conductor member, conductive coating is performed on the unit holding member. In addition, as another method of electrically connecting the unit and the conductor member, it is also performed to electrically connect the unit and the conductor member by a conductive member such as an aluminum tape (for example, Patent Document) 1 and 2).

JP 2008-42134 A Unexamined-Japanese-Patent No. 2007-59490

  As described above, in order to electrically connect the unit and the conductor member held by the unit holding member with low conductivity, additional work such as the implementation of the conductive coating or the addition of the aluminum tape occurred. If additional work occurs, there is a possibility that an influence such as an increase in the number of steps of manufacturing the electronic device may occur. Therefore, an aspect of the disclosed technology is to provide an electronic device in which a unit and a conductor member are electrically connected with less number of steps.

One aspect of the disclosed technology is exemplified by the following electronic device. That is, the electronic device includes a unit, a conductive internal screw, a unit holding member, and a conductive member. The unit has a ground region electrically connected to the ground terminal of the electronic component to be mounted, and an insertion hole through which the male screw is inserted. The conductive female screw is a female screw to be screwed with the male screw, and one end in the screw hole direction of the female screw is in contact with the ground contact area, and has an elastic portion elastically deformed at the other end. The unit holding member has a mounting hole facing the unit and to which a female screw to be screwed with a male screw inserted into the insertion hole is attached. The conductive conductor member is disposed so as to overlap the unit holding member, and is pressed by the elastic portion. The unit holding member is formed with a recess that extends laterally from the mounting hole and allows elastic deformation of the elastic portion.

  According to the disclosed technology, it is possible to provide an electronic device in which a unit and a conductor member are electrically connected with less number of steps.

FIG. 1 is an example of an overall view of a notebook computer. FIG. 2 is a view showing an example of the inner side surface of the case of the notebook computer. FIG. 3 is a view showing an example of a holding part arranged to overlap with the inner side surface of the housing. FIG. 4 is an example of an enlarged view of a part of a circled area in FIG. FIG. 5: is an example of the figure which expanded the vicinity of the penetration hole in which the screw which fixes a printed circuit board to holding components is penetrated. FIG. 6 is an example of an enlarged view of a part of a region surrounded by a circle in FIG. 3 in the comparative example. FIG. 7 is a view showing an example of an insert nut according to a comparative example. FIG. 8 is a view showing an example in which the printed circuit board is fixed to the holding part by the screw and the insert nut. FIG. 9 is a view showing an example of the insert nut according to the first embodiment. FIG. 10 is an example of the holding component as viewed from below the vicinity of the boss hole. FIG. 11 is a view showing an example of a state in which an insert nut is attached to a boss hole of a holding part in the first embodiment. FIG. 12 is a view showing an example of the mounting direction of the insert nut. FIG. 13 is a view showing an example of an insert nut according to a first modification. FIG. 14 is a view showing an example of a state in which an insert nut is attached to a boss hole of a holding part in the first modified example.

  Hereinafter, a notebook computer according to an embodiment will be described with reference to the drawings. The configurations of the embodiments shown below are illustrative, and the disclosed technology is not limited to the configurations of the embodiments.

<Configuration of laptop computer>
FIG. 1 is an example of the entire view of the notebook computer 100. As shown in FIG. The notebook computer 100 has a metal case 10 as an exterior. The housing 10 is subjected to hairline processing (not shown) and the like to improve the appearance of the notebook computer 100.

  In the notebook computer 100, the printed circuit board 30 and the holding component 20 are accommodated in the housing 10. FIG. 2 is a view showing an example of the inner side surface of the case 10 of the notebook computer 100. As shown in FIG. The holding component 20 and the inner side surface of the housing 10 are arranged in an overlapping manner. The printed circuit board 30 is fixed to the holding part 20 by a screw 60. Hereinafter, in the present specification, the housing 10 side is downward, and the printed circuit board 30 is upward.

  The holding component 20 is a component that holds the printed circuit board 30. FIG. 3 is a view showing an example of the holding component 20 disposed so as to overlap the inner side surface of the housing 10. FIG. 3 is a view showing an example in which the printed circuit board 30 is removed in FIG. FIG. 4 is an example of the figure which expanded the part of area | region A enclosed with the circle in FIG. The holding component 20 is a component that holds the printed circuit board 30. The holding part 20 has a boss hole 23 in which the insert nut 50 is attached. The insert nut 50 attached to the boss hole 23 is screwed with a screw 60 for fixing the printed circuit board 30. The top surface 23 a of the boss hole 23 and the top surface 53 of the insert nut 50 are machined flat. Further, the holding component 20 is provided with a plurality of openings 24 for weight reduction and the like. The housing 10 is visible from the opening 24. As the material of the holding part 20, a resin is preferable because it can be easily processed.

On the printed circuit board 30, various electronic components such as integrated circuits, resistors, capacitors, and LEDs (Light Emitting Diodes) are mounted. The printed circuit board 30 supplies the wiring which mutually connects the mounted electronic component. The printed circuit board 30 and the holding component 20 are disposed to face each other. FIG. 5 shows an insertion hole 3 in which a screw 60 for fixing the printed circuit board 30 to the holding part 20 is inserted.
It is an example of the figure which extracted the vicinity of 1. FIG. 5 is a view of the printed circuit board 30 as viewed from above. The printed circuit board 30 has an insertion hole 31 through which the screw 60 is inserted, and is fixed to the holding component 20 by the screw 60 inserted into the insertion hole 31. The wiring 35 is connected to the ground terminal of the electronic component mounted on the printed circuit board 30. A frame ground region (FG region) 32 connected to the wiring 35 is provided in the vicinity of the insertion hole 31. The FG region 33 is provided on the back side of the FG region 32.

  The various electronic components mounted on the printed circuit board 30 are preferably grounded in order to reduce the influence of radio noise or static electricity. Here, in the case of the notebook computer 100, the housing 10 is formed of metal. Therefore, by electrically connecting the FG regions 32 and 33 of the printed circuit board 30 and the housing 10, it is possible to ground the electronic components mounted on the printed circuit board 30. However, the resin forming the holding component 20 is a material having low conductivity. Therefore, the FG regions 32 and 33 of the printed circuit board 30 held by the holding component 20 and the housing 10 are electrically connected by a conductive member. Hereinafter, with reference to the drawings, comparative examples and embodiments in which the FG regions 32, 33 and the housing 10 are electrically connected will be described.

Comparative Example
In the comparative example, an aluminum tape is attached from the top surface 53 of the insert nut 50 attached to the holding component 20 to the housing 10. In the comparative example, an aluminum tape in contact with the FG region 33 of the printed circuit board 30 and the housing 10 electrically connects the FG regions 32 and 33 with the housing 10. Hereinafter, the comparative example will be described with reference to the drawings.

  FIG. 6 is an example of an enlarged view of a portion of the region A encircled in FIG. 3 in the comparative example. The aluminum tape 70 is a member obtained by processing aluminum into a thin film tape shape, and can be easily deformed. The aluminum tape 70 is attached from the top surface 23 a of the boss hole 23 to the housing 10 through the opening 24. The method for attaching the aluminum tape 70 is not particularly limited as long as the conductivity of the aluminum tape 70 can be secured. An insert nut 50 screwed with the screw 60 is attached to the boss hole 23.

  FIG. 7 is a view showing an example of the insert nut 50 according to the comparative example. The insert nut 50 has a substantially cylindrical shape. A thread is provided on the inner side surface portion 51 a of the screw hole 51 provided in the insert nut 50. Further, the outer side surface portion 52 which is the outer side surface of the insert nut 50 is provided with unevenness (not shown). The insert nut 50 is configured so as not to easily come off the boss hole 23 due to the unevenness provided on the outer side surface 52. The insert nut 50 is attached to the boss hole 23 so that the top surface 53 thereof is equal to or less than the height of the top surface 23 a of the boss hole 23. Since the aluminum tape 70 attached to the top surface 23 a of the boss hole 23 is easily deformed, it can also be in contact with the top surface 53 of the insert nut 50 provided at a height equal to or lower than the top surface 23 a of the boss hole 23.

  FIG. 8 is a view showing an example in which the printed circuit board 30 is fixed to the holding part 20 by the screw 60 and the insert nut 50. As shown in FIG. FIG. 8 is a cross-sectional view of the vicinity of the boss hole 23 of the holding component 20 as viewed from the side. In FIG. 8, the screw 60 inserted into the insertion hole 31 of the printed circuit board 30 is screwed with the insert nut 50 attached to the boss hole 23 of the holding component 20. The screw 60 is formed of a conductive material such as metal. The head 61 of the screw 60 is in contact with the FG region 32 of the printed circuit board 30. Further, the aluminum tape 70 is in contact with the FG region 33 of the printed circuit board 30, the top surface 53 of the insert nut 50, and the housing 10. That is, the FG regions 32 and 33 and the housing 10 are electrically connected by the aluminum tape 70. As a result, the ground terminal of the electronic component mounted on the printed circuit board 30 is electrically connected to the housing 10.

  In the comparative example, by sticking the aluminum tape 70 from the top surface 23 a of the boss hole 23 to the housing 10, the ground terminal of the electronic component mounted on the printed circuit board 30 and the housing 10 are electrically connected. However, in the comparative example, when fixing the printed circuit board 30 to the holding component 20, an additional operation of attaching an aluminum tape occurs.

First Embodiment
In the comparative example, by sticking the aluminum tape 70, the FG regions 32, 33 of the printed circuit board 30 and the housing 10 are electrically connected. In the first embodiment, an insert nut in contact with both the FG region 33 and the housing 10 electrically connects the FG regions 32 and 33 to the housing 10. The first embodiment will be described below with reference to the drawings. The same components as those of the comparative example are denoted by the same reference numerals, and the description thereof is omitted.

  FIG. 9 is a view showing an example of the insert nut 150 according to the first embodiment. The insert nut 150 differs from the insert nut 50 in that it has an elastic portion 155 and a taper portion 154. The elastic portion 155 is a leaf spring that is elastically deformable and formed of a conductive member such as metal. The elastic portion 155 is provided to extend laterally from the lower side of the insert nut 150. That is, the elastic portion 155 is provided at the lower end of the insert nut 150 in the direction of the screw hole 51. At least a portion of the elastic portion 155 extends below the bottom surface portion 156 of the insert nut 150. The top surface 153 of the insert nut 150 is formed flat. The tapered portion 154 is an inclined portion provided so as to surround the top surface 153 of the insert nut 150. The insert nut 150 is formed to be thinner on the top surface 153 side by the tapered portion 154. The insert nut 150 is an example of “female screw”.

  FIG. 10 is an example of a view of the vicinity of the boss hole 23 in the holding component 120 as viewed from below. The holding part 120 differs from the holding part 20 in that it has a recess 125. The recess 125 is formed in a concave shape so as to extend laterally from the boss hole 23. The recess 125 provides a space when the elastic portion 155 of the insert nut 150 elastically deforms. The holding component 120 is an example of a “unit holding member”. The boss hole 23 is an example of the “mounting hole”.

  FIG. 11 is a view showing an example of a state in which the insert nut 150 is attached to the boss hole 23 of the holding part 120 in the first embodiment. The housing 10 is disposed to overlap the holding component 120. The housing 10 is pressed by the elastic portion 155 of the insert nut 150. Further, at least the top surface 153 of the insert nut 150 protrudes above the boss hole 23. That is, the top surface 153 protrudes from the boss hole 23 to the printed circuit board 30 side. The top surface 153 protruding above the boss hole 23 is in contact with the FG region 33 of the printed circuit board 30. Further, the head 61 of the screw 60 screwed into the insert nut 150 is in contact with the FG region 32 of the printed circuit board 30. As a result, the FG regions 32 and 33 of the printed circuit board 30 are electrically connected to the housing 10. The printed circuit board 30 is an example of a “unit”. The FG regions 32 and 33 are examples of the “ground region”. The housing 10 is an example of a “conductor member”. The screw 60 is an example of the “male screw”.

FIG. 12 is a view showing an example of the mounting direction of the insert nut 150. As shown in FIG. FIG. 12 is a view of the vicinity of the boss hole 23 in the holding component 120 as viewed from below. The insert nut 150 has a laterally extending elastic portion 155. Therefore, in order to press fit the insert nut 150 into the boss hole 23 from the upper side of the holding part 120, the elastic portion 155 may be hindered. Therefore, the insert nut 150 is attached to the boss hole 23 from the lower side of the holding part 120. As a method of attaching the insert nut 150 to the boss hole 23, it is possible to adopt a heat press-fit method in which the insert nut 150 is pressed into the boss hole 23 while applying heat. The insert nut 150 has the tapered portion 154, which facilitates press-fitting into the boss hole 23.

  By the way, when the insert nut 150 is thermally press-fit from the lower side of the boss hole 23, the resin melted by the heat may adhere to the vicinity of the top surface 23a of the boss hole 23, and a burr may occur. In such a case, a burr may be interposed between the insert nut 150 and the FG region 33. There is a possibility that the electrical connection between the insert nut 150 and the FG region 33 of the printed circuit board 30 may be interrupted. Therefore, in the first embodiment, by causing at least the top surface 153 of the insert nut 150 to protrude above the top surface 23 a of the boss hole 23, the occurrence of such a bad effect is suppressed.

  In addition, when the insert nut 150 is pressed into the boss hole 23, the resin inside the boss hole 23 may be scraped off. The scraped resin adheres to the top surface 153 of the insert nut 150, and there is a possibility that the electrical connection between the insert nut 150 and the FG region 33 of the printed circuit board 30 may be inhibited. Therefore, in the first embodiment, by providing the taper portion 154 on the insert nut 150, it is possible to suppress the resin inside the boss hole 23 from being scraped.

  In the first embodiment, the head 61 of the screw 60 contacts the FG region 32 of the printed circuit board 30, the top surface 153 of the insert nut 150 contacts the FG region 33, and the elastic portion 155 contacts the housing 10. As a result, according to the first embodiment, the FG regions 32 and 33 and the housing 10 are electrically connected without performing additional work such as attaching an aluminum tape to the boss hole 23 or the like. Further, in the first embodiment, the number of manufacturing steps and the number of parts of the notebook computer 100 can be reduced by eliminating the need for additional work such as attaching an aluminum tape.

  In the first embodiment, the elastic portion 155 is provided to extend laterally from the lower side of the insert nut 150. Therefore, the insert nut 150 is less likely to be removed from the boss hole 23 as compared with the insert nut 50 of the comparative example.

  In the first embodiment, the holding part 120 is provided with the recess 125. The recess 125 can provide a space in which the elastic portion 155 of the insert nut 150 can be elastically deformed.

  In the first embodiment, the insert nut 150 is provided with the elastic portion 155. At least a portion of the elastic portion 155 extends below the bottom surface portion 156 of the insert nut 150. That is, the elastic portion 155 contacts the housing 10 earlier than the bottom surface portion 156. The elastic deformation of the elastic portion 155 can absorb dimensional errors in manufacturing of the housing 10 and the holding part 120.

  In the first embodiment, the top surface 153 of the insert nut 150 is protruded above the top surface 23 a of the boss hole 23. As a result, the insert nut 150 can suppress the influence of the burr generated around the top surface 23 a of the boss hole 23.

  In the first embodiment, the insert nut 150 is provided with the tapered portion 154. The tapered portion 154 allows the insert nut 150 to be easily press-fit into the boss hole 23. Further, by having the tapered portion 154, the occurrence of burrs when the insert nut 150 is press-fit into the boss hole 23 is suppressed.

In the first embodiment, by electrically connecting the FG regions 32 and 33 and the housing 10, the electronic components mounted on the printed circuit board 30 are grounded. However, grounding of the electronic components mounted on the printed circuit board 30 is not limited to such a method. For example, a method of providing a metal plate inside the notebook computer 100 and electrically connecting the FG regions 32 and 33 to the metal plate may be employed. In this case, the elastic portion 155 of the insert nut 150 contacts the metal plate. The said metal plate is an example of a "conductor member."

  In the first embodiment, the printed circuit board 30 is mentioned as an example of the “unit”. However, the “unit” is not limited to the printed circuit board 30. As the “unit”, various units mounted with electronic components and fixed by screwing the screw 60 and the insert nut 150 can be adopted. Other examples of the "unit" include, for example, an optical drive unit, a hard disk unit, a power supply unit and a processor unit.

  In the first embodiment, the notebook computer 100 is adopted as an example of the electronic device. However, the application target of the technology described in the first embodiment is not limited to the notebook computer 100. The technology described in the first embodiment is applicable to various electronic devices such as a desktop personal computer, a mobile phone, a smartphone, a tablet terminal, a wearable terminal, and a router.

  In the first embodiment, the insert nut 150 is press-fit into the boss hole 23 by a heat press-fit method. However, the method of attaching the insert nut 150 to the boss hole 23 is not limited to the heat press-in method. In the first embodiment, the insert nut 150 is attached to the boss hole 23 after the formation of the holding part 120. However, the insert nut 150 can be attached to the boss hole 23 when the holding part 120 is formed.

First Modified Example
In the first embodiment, the elastic portion 155 extending laterally of the insert nut 150 is in contact with the housing 10. In the first modification, an elastic portion that elastically deforms is provided below the insert nut, and the elastic portion contacts the housing 10. Hereinafter, the first modification will be described with reference to the drawings. The same components as those of the comparative example or the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  FIG. 13 is a view showing an example of an insert nut 250 according to a first modification. The insert nut 250 differs from the insert nut 150 of the first embodiment in that it has an elastic portion 255 at its lower end. The elastic portion 255 is formed of a conductive material such as metal. The elastic portion 255 is a coil spring formed in a spiral shape. The elastic portion 255 can be elastically deformed in the vertical direction of the insert nut 250 by adopting a coil spring. The insert nut 250 is an example of a "female screw".

  FIG. 14 is a view showing an example of a state in which the insert nut 250 is attached to the boss hole 23 of the holding part 120 in the first modification. The housing 10 is pressed by the elastic portion 255 of the insert nut 250.

  In the first modification, an insert nut 250 having an elastic portion 255 elastically deformable in the vertical direction of the insert nut 250 is employed. Such an insert nut 250 also eliminates the need for an additional operation such as attaching an aluminum tape, as in the first embodiment. As a result, the number of manufacturing steps and the number of parts of the notebook computer 100 can be reduced.

  The elastic portion 255 of the insert nut 250 according to the first modification is a coil spring. Therefore, unlike the elastic portion 155 of the insert nut 150 according to the first embodiment, the elastic portion 255 does not have a portion extending to the side of the insert nut. As a result, it is possible to make the width of the recess 125 provided in the holding component 120 narrower.

  The embodiments and modifications disclosed above can be combined with each other.

100 ... laptop computer 20, 120 ... holding part 23 ... boss hole 24 ... opening 30 ... printed circuit board 31 ... insertion hole 32, 33 ... FG area 40 ... keyboard 50, 150, 250 · · · insert nut 155, 255 · · · elastic portion 60 · · ·

Claims (7)

A unit having a ground region electrically connected to the ground terminal of the electronic component to be mounted, and an insertion hole through which the male screw is inserted;
A female screw screwed with the male screw, wherein one end of the female screw in the screw hole direction is in contact with the ground contact area, and the other end has an elastic portion elastically deformed at the other end;
A unit holding member having a mounting hole to which the female screw which is opposed to the unit and which is screwed with a male screw inserted into the insertion hole is attached;
Wherein are arranged to overlap with the unit holding member, Bei example and a conductive member electrically conductive to be pressed against the elastic portion,
The unit holding member is formed with a recess that extends laterally from the mounting hole and allows elastic deformation of the elastic portion.
Electronics. The elastic portion is a leaf spring provided so as to extend laterally from the other end of the female screw.
The electronic device according to claim 1. The elastic portion is a coil spring elastically deformable in the vertical direction at the other end of the female screw.
The electronic device according to claim 1. The ground areas are provided on both sides of the unit,
The ground contact area provided on one of the two surfaces is in contact with the male screw;
The ground contact area provided on the other of the two surfaces is in contact with the female screw.
The electronic device according to any one of claims 1 to 3. At least a portion of the elastic portion extends closer to the conductor member than the other end of the female screw.
The electronic device according to any one of claims 1 to 4. The one end of the female screw projects from the mounting hole toward the unit.
The electronic device as described in any one of Claims 1-5. The one end of the female screw is tapered.
The electronic device as described in any one of Claims 1-6.

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