JP2005327933A - Resin case - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a resin case, which can be easily disassembled without the use of a tool. <P>SOLUTION: The resin case for housing a printed board comprises an approximately cuboid-shaped lower case 10 and an upper case 20 with their one face opened. The lower case 10 has concave parts 11a to 11d at the inner wall side of the top parts of the two side faces facing each other of the peripheral rim of the opening, and the upper case 20 has clicks 21a to 21d having flexibility toward the inside of the case at the place corresponding to the respective concave parts 11a to 11d of the top part of the side face. The side face of the upper case 20 has the flexibility toward the inside of the case and the lower case 10 and the upper case 20 are assembled with their openings faced each other. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a resin case, and more particularly to a resin case that can be easily assembled and disassembled.

  In recent years, printed circuit boards on which electronic devices are mounted are built in various electronic devices. If the printed circuit board is exposed inside such an electronic device, the circuit pattern on the surface of the circuit board may be scratched to cause poor conduction, and the electronic device may be damaged or dropped off. For this reason, the printed circuit board is often housed in a resin case for protection.

  As a prior art regarding a resin case for accommodating a printed circuit board, there is a “resin case fitting structure” disclosed in Patent Document 1. However, in the configuration of the invention disclosed in Patent Document 1, there is a problem in that a shearing force acting on the printed circuit board accommodated in the case causes the printed circuit board to bend, causing a conduction failure.

  For this reason, a method of fixing the printed circuit board to one case by a method such as screwing is often used instead of sandwiching the printed circuit board from the front and back in the case.

FIG. 6 shows the structure of a conventional resin case. The resin case includes a substantially box-like lower case 30 and a substantially flat plate-like upper case 40. The lower case 30 has a rectangular parallelepiped shape that is hollow and has an open top surface, and is formed with recesses 31 (31a to 31d) on the inner side in the vicinity of both ends of each long side at the periphery of the open surface. A removal groove 32 is provided on the inner side near both ends of one short side.
On the other hand, the upper case 40 is formed with ribs 41 in the vicinity of the peripheral portion except for the central portion of one short side. The rib 41 is interrupted at a portion corresponding to the concave portion 31 on the lower case 30 side in the vicinity of the end portion of each long side, and a claw 42 (42a to 42d) is formed at that portion.

When connecting the lower case 30 and the upper case 40, when the surface of the upper case 40 on which the rib 41 is formed is directed toward the lower case 30 and a force in the compression direction is applied to both cases, FIG. As shown, the claws 42a to 42d are fitted into the corresponding recesses 31a to 31d, and the lower case 30 and the upper case 40 are connected. When the two cases are connected, the removal groove 32 is closed by the rib 41 of the upper case 40. Thus, the conventional resin case can be easily assembled manually.
Japanese Patent Laid-Open No. 9-326567

However, when the lower case 30 and the upper case 40 are separated from each other, the resin case according to the prior art is difficult to release the fitting between the claw and the recess by manual work, and in some cases, it is necessary to use a tool. For example, in the case of the resin case having the above-described structure, when the lower case 30 and the upper case 40 are separated, it is necessary to hook the nail into the removal groove 32 formed on one short side of the lower case 30 and pry it open. However, when the fitting between the claw 42 and the recess 31 is strong, as shown in FIG. 8, a tool having a flat bar shape (for example, a flat-blade screwdriver) is inserted into the removal groove 32 and the lower case 30 is attached. It is necessary to apply force in a direction in which the upper case 40 is separated from the upper case 40 to slide the claws 42b and 42d out of the recesses 31b and 31d.
The same is true for the invention disclosed in Patent Document 1, and it is difficult to push the engaging claw out of the hole manually, and a flat bar-like tool may be required to disassemble the case.

  In the case of the conventional structure shown in FIG. 6, since all the components to be stored must be stored in the lower case 30 side, the layout of the components in the case is limited.

  In this way, the conventional resin case has restrictions on the component layout within the case, and even if a tool is not required for assembly, a tool must be used for disassembly. There was a problem that workability was inferior.

  This invention is made | formed in view of this problem, and it aims at providing the resin-made case which has a high freedom degree in determining the arrangement position of the accommodation object, and can be easily disassembled manually.

  In order to achieve the above object, the present invention is a resin case for storing a printed circuit board, comprising a substantially rectangular parallelepiped lower case and upper case each having one open surface, and one of the lower case and the upper case is , Having at least one recess on the inner wall side of the tip of the two side surfaces facing each other at the peripheral edge of the open surface, and the other being flexible to the inside of the case at a location corresponding to each of the recesses on the side tip The side surface with the upper case or lower case claw has flexibility toward the inside of the case and is assembled with the open surfaces of the lower case and the upper case facing each other. A characteristic resin case is provided.

  In the above configuration, in the lower case and the upper case, guide grooves extending over two adjacent side surfaces are respectively formed at the four corners of the open surface on the side provided with the recesses, and at the four corners of the other open surface, It is preferable that a guide having a shape corresponding to each of the guide grooves is formed so as to protrude from the end of the side surface.

  In any of the above-described configurations of the present invention, it is preferable that the recess and the claw are provided on the side surfaces in the longitudinal direction of the lower case and the upper case.

  According to the present invention, it is possible to provide a resin case that has a high degree of freedom in determining the arrangement position of a storage object and can be easily disassembled manually.

[First Embodiment]
A first embodiment in which the present invention is suitably implemented will be described. FIG. 1 shows the structure of a resin case according to this embodiment. The resin case according to this embodiment includes a lower case 10 and an upper case 20. The lower case 10 and the upper case 20 have a substantially rectangular parallelepiped shape in which the joint surface with the other is opened, and the distance (ie, height and depth) from the open surface to the opposite surface is substantially the same. .

  The lower case 10 is provided with recesses 11 (11a to 11d) at two locations (a total of four locations) on the inner wall side of both long sides (in other words, inside the front end portion of the side wall that becomes the long side) at the periphery of the open surface. ing. Further, the upper case 20 is formed with claws 21 (21a to 21d) at locations corresponding to the recesses 11 on the lower case 10 side of the peripheral edge portion of the open surface (in other words, the end portions of the side walls that are long sides). .

  When the lower case 10 and the upper case 20 are coupled, the open surface of the lower case 10 and the open surface of the upper case 20 are opposed to each other, and a force in the compression direction is applied to both cases. Then, as shown in FIG. 2, each claw 11 enters the inside of the lower case 20 while curving inward, and as shown in FIG. 3, the claw 21a-21d and the corresponding recess 11a-11d are fitted. The lower case 10 and the upper case 20 are coupled together.

  On the other hand, when the lower case 10 and the upper case 20 are separated, the vicinity of the central portion of the side wall on both long sides of the upper case 20 is pressed inward. Then, as shown in FIG. 4, the claw 21 comes out of the recess 11 and the fitting is released. In this state, when a force is applied in a direction to separate the two cases, the lower case 10 and the upper case 20 are separated.

  Thus, the resin case according to the present embodiment can be easily assembled and disassembled manually.

  Moreover, since both the lower case 10 and the upper case 20 are substantially rectangular parallelepiped and the height (depth) is substantially the same, the components to be stored are arranged in both the lower case 10 and the upper case 20. You can assemble the case above. For this reason, there is a high degree of freedom in determining the arrangement position of the storage target.

[Second Embodiment]
A second embodiment in which the present invention is suitably implemented will be described. FIG. 5 shows the structure of the resin case according to this embodiment. As in the first embodiment, the resin case according to the present embodiment has a substantially rectangular parallelepiped shape in which the combination surface with the other of the lower case 10 and the upper case 20 is opened, and the opposite from the open surface. The distance to the side surface (that is, height and depth) is almost the same.

  In the lower case 10, guide grooves 12 (12 a to 12 d) are formed at the four corners of the peripheral edge of the open surface, in addition to the recess 11 similar to the first embodiment. On the other hand, the upper case 20 is provided with guides 22 (22a to 22d) at the four corners of the peripheral edge of the open surface in addition to the claw 21 similar to the first embodiment.

When connecting the lower case 10 and the upper case 10, as in the first embodiment, the open surfaces of both cases are made to face each other, and a force in the compression direction is applied to both cases. Then, each claw 21 and the corresponding recessed part 11 are fitted and the lower case 10 and the upper case 20 are connected. At this time, both cases are positioned by the guide 22 and the guide groove 12.
Thereby, the shakiness at the time of connecting the lower case 10 and the upper case 20 can be reduced.

  Since the method of separating the lower case 10 and the upper case 20 is the same as that of the first embodiment, the overlapping description is omitted.

  Similar to the resin case according to the first embodiment, the resin case according to the present embodiment can be easily assembled and disassembled manually. In addition, the degree of freedom in determining the arrangement position of the storage target is high.

Each of the above embodiments is an example of a preferred embodiment of the present invention, and the present invention is not limited to these.
For example, in each of the above-described embodiments, the configuration in which two claws and two concave portions are provided on both long sides has been described as an example, but three or more of these may be provided on both long sides. Further, it is not necessary to provide the same number on both long sides, and two claws and recesses may be provided on one long side, and three may be provided on the opposite side. If the claw and the recess are provided asymmetrically, it is possible to prevent the lower case and the upper case from being connected in a direction different from the predetermined direction.
Further, in each of the above embodiments, the configuration has been described in which the lower case is provided with the recess and the upper case is provided with the claw. However, the lower case may be provided with the claw and the upper case may be provided with the recess.
As described above, the present invention can be variously modified.

It is a figure which shows the structure of the resin-made cases concerning 1st Embodiment which implemented this invention suitably. It is a figure which shows the state which a nail | claw curves and enters into a lower case. It is a figure which shows the state which the nail | claw and the recessed part fitted. It is a figure which shows the positional relationship of a nail | claw and a recessed part when pressing the side surface of an upper case. It is a figure which shows the structure of the resin-made cases concerning 2nd Embodiment which implemented this invention suitably. It is a figure which shows the structure of the conventional resin case. It is a figure which shows the state which the nail | claw and the recessed part fitted in the conventional resin case. It is a figure which shows the assembly state of the conventional resin case.

Explanation of symbols

10 Lower case 11 Recess 12 Guide groove 20 Upper case 21 Claw 22 Guide

Claims (3)

A resin case for storing a printed circuit board,
Consists of a substantially rectangular parallelepiped lower case and upper case, one side of which is open,
One of the lower case and the upper case has at least one concave portion on the inner wall side of the front end portion of the two side surfaces facing each other at the peripheral portion of the open surface,
The other has a claw with flexibility toward the inside of the case at a location corresponding to each of the concave portions of the side surface tip portion
The side surface provided with the claw of the upper case or the lower case has flexibility to the inside of the case,
A resin case characterized in that the open surfaces of the lower case and the upper case are assembled to face each other. Of the lower case and the upper case, guide grooves extending over two adjacent side surfaces are respectively formed at the four corners of the open surface on the side provided with the recess,
The resin case according to claim 1, wherein guides having a shape corresponding to each of the guide grooves are formed at the four corners of the other open surface so as to protrude from the front end of the side surface.   3. The resin case according to claim 1, wherein the recess and the claw are provided on a side surface in a longitudinal direction of each of the lower case and the upper case.

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