JP2012228817A - Electronic device - Google Patents

Abstract

An electronic apparatus is provided that can omit a post-process for cutting an overflow portion that occurs during resin molding.
An electronic device includes a housing formed in a substantially box shape by a first housing member and a second housing member, and the first housing member and the second housing are provided. A panel 40 is arranged along the boundary between the members 24. The panel 40 includes a plurality of gate portions 42 and weld portions 43 between the gate portions 42 for resin molding, and an overflow tab 41 provided in the weld portion 43 is accommodated in the housing 20. For this reason, the post-process which excises the overflow tab 41 after resin molding can be skipped, and a process can be reduced.
[Selection] Figure 4

Description

  The present invention relates to an electronic device using a resin molded part in a ring shape.

Conventionally, in ring-shaped resin molded products, when the ring shape is formed, the resin that is branched and filled in two directions collides with the weld crack line, which is called a weld line. And it is not preferable in terms of appearance. For this reason, the shaping | molding method which does not produce a weld crack line is proposed (for example, refer patent document 1).
As shown in FIG. 7, in the ring-shaped component 100 molded by the resin molding method described in Patent Document 1, four annular gaskets 101 are connected to the runner portion 103 by the gate portion 102. Each gasket 101 is provided with an overflow portion 104 where resin filled from both sides (see arrows in FIG. 7) collides and merges, and a certain amount of the merged resin is stored.
Thereafter, the gasket 101 is cut off and the overflow portion 104 is cut off, whereby the ring-shaped gasket 101 having no weld crack line can be formed.

Japanese Patent Laid-Open No. 57-22031 (FIG. 5)

  However, the ring-shaped gasket 101 molded by the resin molding method described in Patent Document 1 described above has a problem that a step of separating the overflow portion 104 is required.

  The present invention has been made to solve the conventional problems, and an object of the present invention is to provide an electronic apparatus that can omit a post-process for cutting an overflow portion generated during resin molding.

  An electronic apparatus according to the present invention includes a housing formed in a substantially box shape by a first housing member and a second housing member, and a boundary between the first housing member and the second housing member in the housing. And the panel has a plurality of gate portions and a weld portion between the gate portions, and an overflow tab of the weld portion is accommodated in the housing. Is.

  In the electronic device of the present invention, the overflow tab is engaged with the housing.

  In the electronic device according to the aspect of the invention, the panel may have an annular shape that circulates around the casing along a boundary between the first casing member and the second casing member.

  Furthermore, the electronic device of the present invention has a plurality of the panels, and each of the panels is arranged along a stacking direction of the first casing member and the second casing member.

  In the present invention, the panel has a plurality of gate portions and weld portions between the gate portions for resin molding, and the overflow tab provided in the weld portion is accommodated in the housing. It is possible to provide an electronic apparatus having an effect that the post-process for cutting can be omitted and the process can be reduced.

The perspective view of the portable terminal of embodiment which concerns on this invention The perspective view of the state which removed the cover member of the portable terminal from the housing and turned it over Disassembled perspective view of the housing (A) is a perspective view which shows the flow of the resin at the time of panel shaping | molding, (B) is a top view which shows the position of the weld part which the inject | poured resin contacts Plan view showing the shape of the mold in the weld (A) is sectional drawing of the position corresponding to the weld part of VI-VI position in FIG. 3, and VI-VI position in FIG. 4, (B) is sectional drawing of the BB position in (A). Perspective view of ring-shaped part formed by conventional resin molding method

Hereinafter, an electronic apparatus according to an embodiment of the present invention will be described with reference to the drawings.
As illustrated in FIG. 1, a mobile terminal 10 as an electronic apparatus according to an embodiment of the present invention includes a housing 20 and a lid member 11 that covers the back surface of the housing 20. The housing | casing 20 and the cover member 11 have a rectangular shape of the substantially same planar dimension, and are covering the other party mutually.
That is, as shown in FIG. 2, the battery pack 21 provided in the substantially box-shaped housing 20 is covered with the lid member 11, and the camera unit 22 provided in the housing 20 is provided in the lid member 11. The camera opening 12 is exposed.

  As shown in FIGS. 2 and 3, the housing 20 is formed in a substantially box shape by a cover 23 that is a first housing member and a case 24 that is a second housing member. Between the cover 23 and the case 24, a first panel 30 and a second panel 40 as panels are arranged in the stacking direction of the cover 23 and the case 24 (vertical direction in FIGS. 2 and 3). Yes.

As shown in FIG. 6A, the cover 23 intersects the first wall portion 231 facing the outside (right side in FIG. 6) of the housing 20 and the first wall portion 231 and at the case 24 side (upper side). And a first support surface 232 facing toward the surface.
As shown in FIGS. 6A and 6B, the first wall portion 231 is provided with an engaging recess 233 from the upper end portion downward. The engaging recess 233 has a slit 233A in the vertical direction provided on the outer surface 231A of the first wall portion 231 and a substantially half of the first wall portion 231 in the thickness direction that is continuous with the slit 233A. It has a locking recess 233B.
Therefore, the engagement recess 233 has a T-shaped cross section.

  As shown in FIG. 6A, the case 24 includes a second wall portion 241 that covers a part of the first wall portion 231 of the cover 23, and a tip end of the second wall portion 241 (the lower end in FIG. 6). And a second support surface 242 that faces the first support surface 232 of the cover 23.

As shown in FIGS. 3 and 4, at least one (here, both) of the first panel 30 and the second panel 40 has an annular shape that circulates along the boundary between the cover 23 and the case 24.
As shown in FIG. 6A, the first panel 30 contacts the first wall portion 231 and the first support surface 232 of the cover 23. The second panel 40 is in contact with the first wall portion 231 of the cover 23, the second support surface 242 of the case 24, and the upper surface of the first panel 30.
Note that the following description of the panel will be mainly performed on the second panel 40.

  As shown in FIGS. 6 (A) and 6 (B), the second panel 40 has a first wall for engaging with the engaging recess 233 of the first wall 231 on the inner surface facing the first wall 231. It has the engaging convex part 41 which protrudes to the part 231 side. The engaging convex portion 41 corresponds to the cross-sectional shape of the engaging concave portion 233, and the leg portion 411 that protrudes from the second panel 40 toward the first wall portion 231 side of the cover 23 and the tip of the leg portion 411. The cross section is T-shaped from the locking portion 412 provided at a right angle.

Therefore, when the engaging convex portion 41 of the entire T-shaped second panel 40 is inserted into the engaging concave portion 233 provided on the first wall portion 231 of the cover 23 from above, the engaging convex portion 41 is inserted. The leg portion 411 is inserted into the slit 233 </ b> A of the engaging recess 233. Then, the locking portion 412 of the engaging convex portion 41 is fitted into the locking concave portion 233B of the engaging concave portion 233.
As a result, the engagement convex portion 41 is restricted from moving outward of the housing 20 with respect to the first wall portion 231, so that the second panel 40 is deformed to the outside, and between the first wall portion 231. Prevents gaps from forming.

Next, resin molding of the panel will be described. In the following description, molding of the second panel 40 will be described as an example.
FIG. 4 shows an outline of resin molding of the second panel 40.
First, molding resin is injected into the mold of the second panel 40 (arrow A in FIG. 4A), and poured into the center point perpendicular to the four sides of the second panel 40 (arrow B in FIG. 4A). . The injected molding resin branches and flows in two directions along the mold (in FIG. 4B and arrow C in FIG. 5) to form a plurality of gate portions 42. The injected molding resin collides with the weld part 43.

  For example, as shown in FIG. 5, the weld portion 43 is provided with a T-shaped overflow portion OF, and the molded resin that collides with the weld portion 43 is pressed into the overflow portion OF. The molding resin press-fitted into the overflow portion OF forms the engagement convex portion 41 described above as an overflow tab. The engaging convex portion 41 protrudes inwardly in the second panel 40, and is assembled to the engaging concave portion 233 provided in the first wall portion 231 of the cover 23, and is accommodated inside the housing 20. .

As described above, according to the mobile terminal 10 of the embodiment according to the present invention described above, the mobile terminal 10 has the casing 20 formed in a substantially box shape by the cover 23 and the case 24, and the cover 23 and the case 24. The first panel 30 and the second panel 40 are arranged along the boundary therebetween. The second panel 40 has a plurality of gate portions 42 and weld portions 43 between the gate portions 42 for resin molding, and an engagement convex portion 41 provided on the weld portion 43 is accommodated in the housing 20. Has been.
For this reason, the post-process which excises an overflow tab after resin molding can be omitted, and a process can be reduced.

  In addition, since the engaging portion is formed by the engaging convex portion 41 generated when the second panel 40 is resin-molded, and the engaging portion is engaged with the housing 20, the second panel 40 is attached to the housing 20. It is possible to prevent the second panel 40 from moving or bulging and forming a gap with the housing 20.

  The first panel 30 and the second panel 40 are annular parts that circulate around the casing 20 along the boundary between the cover 23 and the case 24, but the weld part 43 between the gate part 42 and each gate part 42. Therefore, it can be formed integrally in an annular shape.

  Furthermore, since the plurality of panels (the first panel 30 and the second panel 40) are arranged along the stacking direction of the cover 23 and the case 24, the appearance can be improved.

Note that the mobile terminal 10 of the present invention is not limited to the above-described embodiment, and appropriate modifications and improvements can be made.
For example, in the above-described embodiment, the second panel 40 is exemplified, but the first panel 30 can be similarly applied.
The first panel 30 and the second panel 40 are each provided with a plurality of engaging portions, and the same applies to each engaging portion.

  As described above, in the electronic device according to the present invention, the panel has a plurality of gate portions and weld portions between the gate portions for resin molding, and the overflow tab provided in the weld portions is accommodated in the housing. Therefore, the post-process for cutting off the overflow tab after the resin molding can be omitted, and the process can be reduced. This is useful as an electronic device or the like in which a part molded in a ring shape is used.

10 Mobile devices (electronic devices)
20 housing 23 cover (first housing member)
24 Case (second housing member)
40 Second panel (panel)
41 Engaging projection (overflow tab)
42 Gate part 43 Weld part

Claims (4)

A housing formed in a substantially box shape by the first housing member and the second housing member;
A panel arranged along a boundary between the first housing member and the second housing member in the housing,
The panel has a plurality of gate portions and a weld portion between the gate portions,
An electronic device in which an overflow tab of the weld portion is accommodated in the housing. The electronic device according to claim 1,
An electronic device in which the overflow tab is engaged with the housing. The electronic device according to claim 1,
An electronic apparatus in which the panel is a ring that circulates around the casing along a boundary between the first casing member and the second casing member. The electronic device according to claim 1,
An electronic apparatus comprising a plurality of the panels, wherein each of the panels is arranged along a stacking direction of the first housing member and the second housing member.

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