JP2023083927A - Portable terminal - Google Patents

Abstract

To provide a portable terminal in which contact failure can be suppressed.SOLUTION: A portable terminal comprises: a circuit board which includes a first principal surface and a second principal surface, and includes a first marginal portion in which a connector is arranged and a second marginal portion opposite to the first marginal portion; a first chassis which is arranged opposite to a first principal surface of the circuit board and includes a first projection portion projecting toward the circuit board, and abutting on a support position nearer to the first marginal portion than the second marginal portion of the circuit board; a second chassis which is arranged opposite to a second principal surface of the circuit board and joined to the first chassis and has a second projection portion projecting toward the circuit board and abutting on the support position of the circuit board; a first buffer member which is interposed between the circuit board and the first chassis on the more second marginal portion side than the support position; and a second buffer member which is interposed between the circuit board and the second chassis on the more second marginal portion side than the support position.SELECTED DRAWING: Figure 4

Description

The present invention relates to mobile terminals.

Patent Literature 1 discloses a portable terminal provided with cushioning members that cover the entire surface area and the entire area of the back surface of a circuit board and sandwich the circuit board from both the front surface side and the back surface side.

JP 2018-14365 A

However, in the conventional technology described above, the circuit board sandwiched between the cushioning members shakes greatly when the portable terminal receives an impact, which may cause contact failure depending on the type of connector provided on the circuit board.

The present invention has been made in view of the above problems, and a main object of the present invention is to provide a portable terminal capable of suppressing contact failure.

In order to solve the above problems, a mobile terminal according to one aspect of the present invention has a first main surface and a second main surface, a first edge on which a connector is arranged, and a terminal opposite to the first edge. a circuit board having a second edge; and a first chassis disposed opposite the first main surface of the circuit board, the first chassis protruding toward the circuit board and the second edge of the circuit board. a first chassis having a first protrusion abutting a support position closer to the first edge than the first chassis; a second chassis having a second protrusion that protrudes toward the circuit board and abuts against the support position of the circuit board; a first cushioning member interposed between the circuit board and the first chassis; and a second cushioning member interposed between the circuit board and the second chassis on the second edge side of the supporting position. Prepare. According to this, it is possible to reduce the shaking of the first edge where the connector is arranged, and to suppress the contact failure.

In the above aspect, the first protrusion and the second protrusion may extend along the first edge. According to this, it is possible to reduce the shaking of the entire first edge where the connector is arranged.

In the above aspect, the first protrusion and the second protrusion may have outer peripheral surfaces centered on an axis along the first edge. According to this, it becomes possible to reduce the stress generated in the circuit board.

In the above aspect, the first protrusion and the second protrusion may be formed in a semi-cylindrical shape extending along the first edge. According to this, it becomes possible to reduce the stress generated in the circuit board.

In the above aspect, the connector may be a spring contact connector. According to this, it is possible to suppress the contact failure of the spring contact.

In the above aspect, a notch may be formed in a region of the first chassis or the second chassis corresponding to the connector. According to this, the chassis can be brought close to the circuit board regardless of the height of the connector.

In the above aspect, the first protrusion and the second protrusion may be arranged adjacent to the second edge side of the connector. According to this, it is possible to further reduce the shaking of the first edge where the connector is arranged.

In the above aspect, the first protrusion and the second protrusion may be arranged side by side with the connector along the first edge. According to this, it is possible to further reduce the shaking of the first edge where the connector is arranged.

In the above aspect, the first cushioning member and the second cushioning member may be arranged along the edge of the circuit board. According to this, it is possible to suppress the collision between the circuit board and the chassis while suppressing the amount of the buffer member.

In the above aspect, the first chassis and the second chassis may not come into contact with the circuit board except at the first protrusion and the second protrusion. According to this, it is possible to suppress the collision between the circuit board and the chassis by the buffer member.

In the above aspect, the circuit board, the first chassis, the second chassis, the first cushioning member, and the second cushioning member constitute a board holding unit, and the board holding unit is a housing of the mobile terminal. May be housed in the body. According to this, it is possible to realize a portable terminal that accommodates a substrate holding unit capable of suppressing contact failure.

1 is a perspective view of a mobile terminal according to an embodiment; FIG. 1 is an exploded perspective view of a mobile terminal; FIG. 4 is a perspective view of a substrate holding unit; FIG. 3 is an exploded perspective view of the substrate holding unit; FIG. 4 is a plan view of the substrate holding unit; FIG. FIG. 6 is a cross-sectional view taken along line VI-VI of FIG. 5; FIG. 7 is an enlarged view of a main portion of FIG. 6; 3 is an exploded perspective view of the substrate holding unit; FIG. 4 is a plan view of the substrate holding unit; FIG. FIG. 10 is a cross-sectional view taken along line XX of FIG. 9; FIG. 11 is an enlarged view of a main portion of FIG. 10;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 and 2 are a perspective view and an exploded perspective view of a mobile terminal 1 according to an embodiment. In this embodiment, the mobile terminal 1 is a handy terminal capable of reading codes such as barcodes or QR codes (registered trademark).

A mobile terminal 1 includes a housing 2 and a board holding unit 3 housed in the housing 2 . The housing 2 is formed by integrally combining a first half housing 21 and a second half housing 22 .

3 and 4 are a perspective view and an exploded perspective view of the substrate holding unit 3 (hereinafter referred to as substrate holding unit 3A) according to the first embodiment. In the following description, the X1 direction in FIG. 4 is referred to as the forward direction, the X2 direction as the rearward direction, the Y1 direction as the left direction, the Y2 direction as the right direction, the Z1 direction as the upward direction, and the Z2 direction as the downward direction.

FIG. 5 is a plan view of the substrate holding unit 3A. FIG. 6 is a cross-sectional view of the substrate holding unit 3A taken along line VI-VI in FIG. 7 is an enlarged view of a main part of FIG. 6. FIG.

As shown in FIG. 4, the board holding unit 3A includes a circuit board 4, a first chassis 31, a second chassis 32, a first cushioning member 71, and a second cushioning member 72. As shown in FIG. These are stacked in order of the first chassis 31, the first cushioning member 71, the circuit board 4, the second cushioning member 72, and the second chassis 32 from above.

The circuit board 4 is a so-called rigid board. The first chassis 31 and the second chassis 32 are made of synthetic resin such as ABS resin. The first cushioning member 71 and the second cushioning member 72 are made of foamed resin such as polyurethane foam.

The circuit board 4 has an upper main surface and a lower main surface, and is formed in a substantially rectangular shape that is longer in the front-rear direction than in the left-right direction. The circuit board 4 has a front edge 41 on which the connector 5 is arranged and a rear edge 42 opposite the front edge 41 . The upper major surface is an example of the first major surface, the lower major surface is an example of the second major surface, the leading edge 41 is an example of the first edge, and the trailing edge 42 is an example of the second edge.

The connector 5 enables electrical connection between the components arranged outside the board holding unit 3A and the circuit board 4 . The connector 5 is, for example, a spring contact connector and has an elastically deformable bent terminal 53 as a spring contact. Terminal 53 contacts, for example, battery B (see FIGS. 6 and 7).

The first chassis 31 is arranged above the circuit board 4 so as to face the upper main surface of the circuit board 4 . The first chassis 31 is formed in a substantially rectangular shape that is slightly larger than the circuit board 4 and covers the entire upper main surface of the circuit board 4 except for the area where the connector 5 is arranged. A cutout 37 for avoiding the connector 5 is formed in a region of the first chassis 31 corresponding to the connector 5 .

The first chassis 31 protrudes toward the circuit board 4 and is positioned at a support position M closer to the front edge 41 than the rear edge 42 of the circuit board 4 (specifically, a support position M near the front edge 41). It has a protrusion 33 that abuts. The protrusion 33 of the first chassis 31 is an example of a first protrusion.

The second chassis 32 is arranged below the circuit board 4 so as to face the lower main surface of the circuit board 4 . The second chassis 32 is formed in a substantially rectangular shape that is slightly larger than the circuit board 4 and covers the entire lower main surface of the circuit board 4 .

The second chassis 32 protrudes toward the circuit board 4 and has a protrusion 34 that abuts on the support position M of the circuit board 4 . The protrusion 34 of the second chassis 32 is an example of a second protrusion.

The first chassis 31 and the second chassis 32 are coupled with each other. Specifically, the coupling is realized by engaging portions 61 and 62 and fastening portions 63 and 64 provided on both left and right sides of the first chassis 31 and the second chassis 32 . The engaging portions 61 and 62 are, for example, snap-fit. The fastening portions 63 and 64 are fastened with screws, for example.

As shown in FIGS. 6 and 7, the projection 33 of the first chassis 31 and the projection 34 of the second chassis 32 sandwich the circuit board 4 therebetween. Specifically, the protrusion 33 of the first chassis 31 abuts on the upper main surface side of the support position M of the circuit board 4 , and the protrusion 34 of the second chassis 32 contacts the support position M of the circuit board 4 . It abuts on the lower main surface side.

When the first chassis 31 and the second chassis 32 are coupled to each other and the circuit board 4 is sandwiched between the protrusions 33 and 34, the first chassis 31 and the second chassis 32 are slightly elastically deformed in the direction of separating from each other. An elastic force for sandwiching the circuit board 4 between the protrusions 33 and 34 is exerted.

The protrusions 33 and 34 extend along the front edge 41, that is, extend in the left-right direction. Moreover, the protrusions 33 and 34 have outer peripheral surfaces centered on the left-right axis along the front edge portion 41 . Specifically, the protrusions 33 and 34 are formed in a semi-cylindrical shape extending along the front edge portion 41 .

The protrusions 33 and 34 are not limited to this, and may be formed, for example, in the shape of a triangular prism, and the corners thereof may abut against the circuit board 4 . As will be described later, from the viewpoint of vertically swinging the rear edge portion 42 of the circuit board 4 with the support position M as a fulcrum, a smaller contact area is preferable.

Further, the protrusions 33 and 34 may be formed, for example, in the shape of a quadrangular prism, and the front and rear corners of the surface that abuts on the circuit board 4 may be used as outer peripheral surfaces. As a result, the stress generated during rocking can be alleviated while securing the area that abuts on the circuit board 4 and stabilizing the posture.

In the substrate holding unit 3A, the protrusion 33 is formed at the edge of the notch 37 and arranged adjacently to the rear of the connector 5. As shown in FIG. The protrusion 33 and the edge of the notch 37 are continuous. That is, the front surface of the protrusion 33 and the edge surface of the notch 37 form one continuous surface.

The first chassis 31 and the second chassis 32 do not come into contact with the circuit board 4 except for the protrusions 33 and 34 . That is, since the first cushioning member 71 and the second cushioning member 72 are arranged, the first chassis 31 and the second chassis 32 do not come into direct contact with the circuit board 4 other than the protrusions 33 and 34 .

By being sandwiched between the projections 33 and 34, the circuit board 4 is supported so as to be vertically swingable about a support position M at which the projections 33 and 34 abut. Since the support position M where the projections 33 and 34 abut is closer to the front edge 41 than the rear edge 42 of the circuit board 4, the swing width of the front end 41 is smaller than the swing width of the rear end 42. FIG.

Specifically, since the support position M at which the protrusions 33 and 34 abut is near the front edge 41 of the circuit board 4, the swing width of the rear end 42 is relatively large, whereas the front end 41 is considerably smaller.

The support position M is preferably located in an adjacent area rearwardly adjacent to the arrangement area of the connector 5 . The adjacent region is, for example, a region starting from the rear end of the placement region and having the same longitudinal length as the placement region.

4 and 6, the first cushioning member 71 is interposed between the circuit board 4 and the first chassis 31 at least on the rear edge portion 42 side of the support position M. As shown in FIGS. The first cushioning member 71 is formed in a frame shape that has a rear side portion 712 , a left side portion 713 , and a right side portion 714 and is open forward, and is positioned closer to the rear edge portion 42 than the support position M of the circuit board 4 . are placed along the edges of the

It is preferable that the rear side portion 712 of the first buffer member 71 is closer to the rear edge portion 42 of the circuit board 4 . The left side portion 713 and the right side portion 714 are formed with notches for avoiding the engaging portions 61 and 62 and the fastening portions 63 and 64 provided on both left and right sides of the first chassis 31 and the second chassis 32, respectively.

The first cushioning member 71 is not limited to the above aspect. The first buffer member 71 may be arranged, for example, over the entire area of the upper main surface of the circuit board 4 excluding the area where the connector 5 is arranged, or may be arranged dispersedly in a plurality of islands. Further, the first cushioning member 72 may be arranged on the front edge portion 41 side of the support position M as well.

The second cushioning member 72 is also interposed between the circuit board 4 and the second chassis 32 at least on the rear edge portion 42 side of the support position M, similarly to the first cushioning member 71 . Specifically, the second cushioning member 72 is formed in a frame shape that has a rear side portion 722, a left side portion 723, and a right side portion 724 and is open forward, and is positioned further than the support position M of the circuit board 4. It is arranged along the edge on the trailing edge 42 side.

It is preferable that the rear side portion 722 of the second cushioning member 72 is closer to the rear edge portion 42 of the circuit board 4 . The left side portion 723 and the right side portion 724 are formed with cutouts for avoiding the engaging portions 61 and 62 and the fastening portions 63 and 64 provided on both left and right sides of the first chassis 31 and the second chassis 32, respectively.

The second cushioning member 72 is not limited to the above aspect. The second cushioning member 72 may be arranged, for example, over the entire area of the lower main surface of the circuit board 4, or may be arranged dispersedly in a plurality of islands. Further, the second cushioning member 72 may be arranged on the front edge portion 41 side of the support position M as well.

According to the board holding unit 3A described above, when the mobile terminal 1 receives an impact, the impact transmitted to the circuit board 4 is mitigated by the first cushioning member 71 and the second cushioning member 72, and the contact points of the connector 5 are reduced. Defects can be prevented.

The circuit board 4 is supported by the protrusions 33 and 34 so as to be able to swing vertically with the support position M as a fulcrum. 2, the impact is mitigated by the first buffer member 71 interposed between the circuit board 4 and the first chassis 31 . When the rear edge portion 42 of the circuit board 4 swings downward due to the impact received by the mobile terminal 1 , the impact is mitigated by the second cushioning member 72 interposed between the circuit board 4 and the second chassis 32 .

On the other hand, since the front edge portion 41 of the circuit board 4 on which the connector 5 is arranged hardly shakes, it is possible to prevent contact failure of the connector 5 . This is particularly useful when connector 5 is a spring contact connector and is connected to battery B. FIG. That is, even if the portable terminal 1 receives an impact, the front edge portion 41 of the circuit board 4 on which the connector 5 is arranged does not substantially shake. It becomes possible to

Next, a substrate holding unit 3 (hereinafter referred to as substrate holding unit 3B) according to the second embodiment will be described.

8 and 9 are an exploded perspective view and a plan view of the substrate holding unit 3B. FIG. 10 is a cross-sectional view of the substrate holding unit 3B taken along line XX in FIG. 11 is an enlarged view of a main part of FIG. 10. FIG. A detailed description may be omitted by attaching the same number to the configuration that overlaps with the first embodiment.

In the board holding unit 3B, the protrusions 33 and 34 are arranged along the front edge 41 of the circuit board 4 and aligned with the connector 5 . Specifically, the protrusions 33 and 34 are divided into left and right sides so as to sandwich the arrangement area of the connector 5 , and are arranged in a line on both left and right sides of the connector 5 .

As shown in FIG. 11, the projecting portions 33 and 34 overlap the arrangement area of the connector 5 in a side view. The front edge of the first chassis 31 and the protrusion 33 are continuous. That is, the front edge surface of the first chassis 31 and the front surface of the protrusion 33 form one continuous surface.

According to this, the support position M at which the protrusions 33 and 34 abut becomes closer to the front edge portion 41 of the circuit board 4, so that the front edge portion 41 can be substantially prevented from swinging, and contact failure of the connector 5 can be prevented. becomes possible.

Although the embodiments of the present invention have been described above, the present invention is not limited to the embodiments described above, and it goes without saying that various modifications can be made by those skilled in the art.

1 mobile terminal, 2 housing, 21 first half housing, 22 second half housing, 3 (3A, 3B) substrate holding unit, 31 first chassis, 32 second chassis, 33 projection (first projection) ), 34 projection (second projection), 37 notch, 4 circuit board, 41 front edge (first edge), 42 rear edge (second edge), 5 connector, 53 terminal, 61, 62 engagement portion 63, 64 fastening portion 71 first buffer member 72 second buffer member B battery M support position

Claims (11)

a circuit board having a first major surface and a second major surface and having a first edge on which a connector is disposed and a second edge opposite the first edge;
A first chassis positioned opposite the first major surface of the circuit board, the support projecting toward the circuit board and closer to the first edge than to the second edge of the circuit board. a first chassis having a first protrusion abutting a position;
A second chassis arranged to face the second main surface of the circuit board and coupled to the first chassis protrudes toward the circuit board and abuts on the supporting position of the circuit board. a second chassis having two protrusions;
a first buffer member interposed between the circuit board and the first chassis on the second edge side of the supporting position;
a second buffer member interposed between the circuit board and the second chassis on the second edge side of the supporting position;
A mobile terminal. the first protrusion and the second protrusion extend along the first edge;
The mobile terminal according to claim 1. The first projection and the second projection have an outer peripheral surface centered on an axis along the first edge,
3. The mobile terminal according to claim 1 or 2. The first protrusion and the second protrusion are formed in a semi-cylindrical shape extending along the first edge,
4. The portable terminal according to claim 1. wherein the connector is a spring contact connector;
5. The portable terminal according to claim 1. a notch is formed in a region of the first chassis or the second chassis corresponding to the connector;
6. The portable terminal according to claim 1. The first protrusion and the second protrusion are arranged adjacent to the second edge side of the connector,
7. The portable terminal according to claim 1. each of the first protrusion and the second protrusion are arranged in a row on both sides of the connector along the first edge;
7. The portable terminal according to claim 1. The first cushioning member and the second cushioning member are arranged along the edge of the circuit board,
9. The mobile terminal according to any one of claims 1 to 8. The first chassis and the second chassis do not come into contact with the circuit board except for the first protrusion and the second protrusion.
10. The mobile terminal according to any one of claims 1 to 9. The circuit board, the first chassis, the second chassis, the first cushioning member, and the second cushioning member constitute a substrate holding unit,
The substrate holding unit is accommodated in a housing of the mobile terminal,
11. The mobile terminal according to any one of claims 1 to 10.

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