JP3129138B2 - Plate holding structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate holding structure,
In particular, the present invention relates to a plate holding structure for holding a plate in a housing.

[0002]

2. Description of the Related Art Conventionally, as this type of plate material holding structure, there is known a structure in which a printed circuit board is inserted into and held in a housing-like housing case as shown in FIGS. The storage case 1 includes a lower case 2 having a bottomed cylindrical shape, and the lower case 2.
And an upper case 3 having locking portions 3b projecting from both side ends of the lid 3a. The locking portions 3b extend along the outer surface of the lower case 2 and have locking holes 3b1 and 3b1 penetrating in the side direction of the lower case 2.
The outer surface of the lower case 2 has the same locking holes 3b1, 3b.
The wedge-shaped projections 2b, 2b which can be locked to b1 are formed.

A substantially linear groove 2 is formed on an inner peripheral surface of the lower case 2 at a side surface facing the opening.
c, 2c are formed, and the printed circuit board 4 in the form of a rectangular plate can be accommodated in the lower case 2 along the grooves 2c, 2c. Here, the tips of the grooves 2c are tapered tapered surfaces 2c1 and 2c1, and when the printed circuit board 4 is inserted, the corners of the tips are pressed in while shaving the tapered surfaces 2c1. Therefore, in the inserted state, the front end portion of the printed circuit board 4 is held by the groove 2c of the lower case 2,
It is held without rattling.

[0004]

In the above-described conventional plate holding structure, the lower case 2 is scraped off from the printed circuit board 4 and press-fitted. There was a problem that it would occur. The present invention has been made in view of the above problems, and has as its object to provide a plate material holding structure capable of preventing rattling even by repeated insertion and removal.

[0005]

In order to achieve the above object, the present invention according to claim 1 is directed to an inner peripheral side surface of a housing facing the opposite side.
A plate that inserts and holds both ends of the plate material in the groove formed in
This is a material holding structure.
The body side and the plate material side come into contact and bend the plate material in the thickness direction.
A plate holding structure having a contact structure
Is a strip-shaped flexible piece cut from the edge of the plate material
And abutting against a flexure piece formed on the inner peripheral side surface of the housing.
A contact part that bends the piece in the thickness direction of the plate
It has characteristics. Further, the invention of claim 2 is based on claim 1
In the plate material holding structure described in the above, the housing is a method for inserting the plate material.
A cover that covers the opening from the
Deflects the plate material toward the back in the insertion direction
It has a feature on the slope.

[0006]

[0007]

[0008]

[0009]

In the present invention constructed as described above, when the plate is inserted into the housing, the abutting portion formed on the inner peripheral side surface of the housing abuts on the flexure, and the flexure has a thickness. Flex in the direction. Since the bending piece is formed in a strip shape by forming a cut from the edge of the plate material, the bending piece easily bends, and thereby the other portions of the plate material are small in bending. Further, in the invention according to claim 2 configured as described above, the contact portion with which the bending piece comes into contact has a slope that bends the plate material toward the back in the insertion direction. And bends in the thickness direction while acting to push back in the direction opposite to the insertion direction. The housing is provided with a lid that covers the opening, and the plate material hits the lid when pushed back in the opposite direction. Therefore, the lid is urged in the opening direction,
The lid itself does not rattle.

[0010]

[0011]

As described above, according to the present invention, since the inserted plate is bent so that the housing and the plate come into contact with each other by the repulsive force, the rattle does not rattle and the insertion and removal are repeated. A plate material holding structure capable of preventing the effect of preventing rattling from being lost can be provided. Only
Also, since the bending piece formed by cutting the edge of the plate material is mainly bent, the bending of the other portion of the plate material is reduced. In the case where the plate material itself has a tendency to bend, for example, in the case where there is a concern that the components may come off on a printed circuit board, the bending of the plate material can be reduced and the reliability can be improved.

Further, according to the second aspect of the present invention, rattling of the lid can be reduced.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partially transparent perspective view of a substrate storage box to which a plate holding structure according to an embodiment of the present invention is applied. In the figure, a board storage box 10 is a rectangular board-shaped printed board 20.
And a resin case 30 having a rectangular cross section for accommodating the printed circuit board 20. Since components are mounted on the surface of the printed circuit board 20, the printed circuit board 20 is not inserted into the center of the resin case 30 but is inserted with a slight offset.

The resin case 30 is composed of a lower case 31 having a bottomed cylindrical shape and an upper case 32 for covering the opening 31a of the lower case 31.
Of the inner peripheral surfaces of the above, grooves 33, 33 into which the side ends of the printed circuit board 20 can be inserted are formed on the inner peripheral surface in the width direction. The groove 33 is slightly wider at the end of the opening 31a, and is formed substantially linearly in the depth direction. Further, a projection 34 as a contact portion is formed at the bottom corner of the lower case 31 at the center in the width direction.
The projection 34 has an arc-shaped inclined surface 34a facing the opening 31a side, and has a straight surface 34b on the extension of the inclined surface 34a, which coincides with the insertion direction. The straight surface 34b overlaps the groove 33 as shown in the cross section of FIG. The groove 33 is inserted into the end of the printed circuit board 20 and sandwiched from both sides. This also means that a step is formed on both sides and the end of the printed circuit board 20 is inserted between them. Therefore, the groove 33 can be said to be a step.

The upper case 32 has a cover 32a for covering the opening 31a of the lower case 31, and locking portions 32b, 32b protruding from both side ends of the cover 32a.
The locking portions 32b and 33b extend along the outer surface of the lower case 31 and have locking holes 32b1 and 32b1 penetrating in the side direction of the lower case 31. The outer surface of the lower case 31 is formed with wedge-shaped projections 31b, 31b which can be locked with the locking holes 32b1, 32b1.

The printed circuit board 20 has cuts 21 and 21 on both sides of a portion facing the projection 34 along the insertion direction.
Are formed, and a bending piece 22 is formed in a strip-like portion therebetween. Next, the operation of the present embodiment having the above configuration will be described. The printed circuit board 20 is inserted through the opening 31 a of the lower case 31 from the side of the bending piece 22. Printed circuit board 20
Of the lower case 31 is inserted into the groove 33 on the inner peripheral surface of the lower case 31. When the printed circuit board 20 is pushed as it is, the front end of the printed circuit board 20 comes into contact with the slope 34 a of the projection 34 formed at the bottom corner of the lower case 31. The distal end of the flexure 22 is in contact with the flexure 22. When the flexure 22 is further pushed in, the flexure 22 rises on the slope 34a from the tip and flexes as shown in FIG. In this state, the bending piece 22 is placed on the slope 34.
a, the printed circuit board 20 is drawn to the bending piece 22 side.
3, it is pressed against one of the steps on both sides of each groove 33. That is, the printed circuit board 20 is always pressed against one step of the groove 33, and does not rattle. In the present embodiment, the cuts 21 and
Although the bending piece 22 sandwiched between the first and second components 1 is made to ride on the projection 34 as the contact portion, the same applies to a configuration in which the tip of the printed circuit board 20 is bent without the notch 21 being formed. It is possible to prevent rattling. However, by forming the bending piece 22, the bending range does not reach the entire printed circuit board 20. Since printed wiring is provided on the printed circuit board 20 and solid components are mounted on the printed circuit board 20, it is sometimes better not to bend the printed circuit board 20 too much. In such a case, if only the bending piece 22 is mainly bent, it is possible to reduce the possibility of occurrence of a failure and improve reliability. In addition, the reaction force at the time of bending by adjusting the width of the bending piece 22 can also be adjusted. In addition, in order to bend the printed board 20, one end of the printed circuit board 20 may be pressed in one direction, and the middle of the printed circuit board 20 may be pressed in the opposite direction. Therefore, it is not always necessary to hold the printed circuit board 20 so as to sandwich it like the groove 33, and it is sufficient that at least a step is formed on the side facing the projection 34. In addition, this step may naturally be a mere protrusion that supports the printed circuit board 20. Further, the projection 34 itself does not need to be rigid, and if it has flexibility, there is an effect of reducing the bending of the printed circuit board 20.

Next, the lower case 3 is connected to the upper case 32.
One opening 31a is covered. That is, the locking portions 32b, 32b are covered by the lid 32a so as to cover the opening 31a.
Between the lower case 31 and the locking portion 32 as it is.
b and 32b are pushed in along the side surface of the lower case 31. A wedge-shaped projection 31b is provided on the side surface of the lower case 31,
31b is projected, and after the locking portions 32b, 32b ride on the projections 31b, 31b, the projections 31b, 3
1b enters the locking holes 32b1 and 32b1 and locks. When locked, the lid 32 a covers the opening 31 a of the lower case 31. On the other hand, since the tip of the bending piece 22 only rides on the slope 34a, the slope 3
Attempts to slide down along 4a. This sliding force acts to push back the printed circuit board 20. Therefore,
The printed circuit board 20 is covered with the lid 3 of the upper case 32 from the inside.
Attempt to push 2a. As described above, the upper case 32 is provided with the wedge-shaped protrusion 3 in the locking hole 32b1 of the locking portion 32b.
1b enters and is locked, so that the upper case 32
When pushing out from the inside, the projection 31b
It is pressed against one side of b1 and does not rattle.

In the present embodiment, the inclined surface 34a is formed in an arc shape. However, the shape is not limited to the arc shape, and various shapes can be used so that the vehicle slides down while riding up. Also, the number of protrusions 34 is not limited to one,
A plurality may be provided. As described above, the straight grooves 33, 33 are formed on the facing side walls in the lower case 31 having a rectangular cross section, and the projections 34 are formed at the corners at the center of the bottom surface in the width direction. A part of the projection 34 is overlapped in the middle of connecting the
When the end of the printed circuit board 20 is inserted into the third and the third 33 and pushed down to the bottom, the tip of the printed circuit board 20 becomes a projection 34.
Get in contact with. Therefore, the printed circuit board 20 is supported at both ends by the grooves 33 and 33 and is bent in the middle by contacting the projections 34, so that the printed circuit board 20 is held without rattling.

[Brief description of the drawings]

FIG. 1 is a partially transparent perspective view of a substrate storage box to which a plate holding structure according to an embodiment of the present invention is applied.

FIG. 2 is a sectional view of the substrate storage box.

FIG. 3 is an enlarged cross-sectional view showing a state in which a flexure piece rides on.

FIG. 4 is a partially transparent perspective view of a substrate storage box to which a conventional plate holding structure is applied.

FIG. 5 is a sectional view of the substrate storage box.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Board storage box 20 ... Printed circuit board 21 ... Cut 22 ... Flexure piece 30 ... Resin case 31 ... Lower case 31a ... Opening 31b ... Projection 32 ... Upper case 32a ... Lid 32b ... Locking part 33 ... Groove 34 ... Projection 34a ... Slope 34b: Straight surface

Claims (2)

(57) [Claims] 1. A groove formed on an inner peripheral side surface of a housing facing the opposite side.
The plate holding structure inserts and holds both ends of the plate at the
So, When the above-mentioned plate is inserted into the above-mentioned case, the case side and the plate side
And a contact structure that makes the plate material bend in the thickness direction by contact
In the plate holding structure provided, The contact structure is formed by cutting from the edge of the plate.
Formed on the inner peripheral side surface of the above-mentioned housing.
The flexible piece abuts on the flexible piece and bends in the thickness direction of the plate.
A plate holding structure, comprising: 2. The plate material holding structure according to claim 1,
And the housing covers the opening from the direction of insertion of the plate material.
And the abutment part is inserted in the insertion direction.
It is a slope that bends the plate material as it goes to the back
A plate holding structure, characterized in that: