JPH04363098A - Printed board fixing structure - Google Patents

Abstract

PURPOSE:To improve the fixing work efficiency and prevent the cracking from the fixing part. CONSTITUTION:This is a printed board fixing structure which fixes a printed board 2 where operating component parts 2b are mounted to a fixed body 1, and the fixed body 1 is provided with a groove 13 in which to slide and insert the margin 2e of the printed board 2, and the groove 1e is provided with an abutment part with the printed board 2 and a return preventive part 1g, whereby the top 2f of the printed board 2 abuts on five abutment part when the printed board 2 reaches the fixing position, and also the rear end 2g of the printed board is locked with the return preventive part 1g.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed circuit board fixing structure for fixing a printed circuit board on which operating parts are mounted.

0002

2. Description of the Related Art FIG. 4 is an exploded perspective view showing a conventional printed circuit board fixing structure. As shown in FIG. 4, the cover 1 corresponding to the fixed object is a box-shaped one made of synthetic resin with a flat bottom side open, and three square display windows 1a on the top side.
and four elongated operation holes 1b are provided respectively, and two opposing holes are provided.
A strip-shaped rib 1c is provided inside each side surface. Each rib 1c is provided with three screw holes 1d.

The printed circuit board 2 also includes three light emitting elements 2a and four pushbutton switches 2b corresponding to operation parts.
Although not shown, other electronic components are mounted. Further, the printed circuit board 2 is provided with six fixing holes 2c for fixing the printed circuit board 2 to the ribs 1c of the cover 1 with screws 3.

Therefore, in order to fix the printed circuit board 2 to the cover 1 in this case, insert the printed circuit board 2 into the cover 1 in the direction of arrow A, and pass the six screws 3 through the six fixing holes 2c. It is fixed by screwing into three screw holes 1d provided in each rib 1c. Then, the three light emitting elements 2a are located directly below the three display windows 1a, and the four pushbutton switches 2b are located directly below the four operation holes 1b.

[0005]

SUMMARY OF THE INVENTION As described above, the conventional structure for fixing the print board 2 to the cover 1 requires as many as six screws. This is because stress is applied to the printed circuit board 2 when the push button switch 2b is operated, and by dispersing this stress, cracks can be prevented from occurring at the fixing hole 2c portion of the printed circuit board 2. As described above, the conventional printed circuit board fixing structure requires a large number of screws, and there is a problem in that it takes time to fix the printed circuit board 2 to the cover 1, resulting in poor fixing efficiency.

The present invention has been made in order to improve the above-mentioned problems, and its purpose is to improve work efficiency even when fixing a printed circuit board on which operating parts are mounted. To provide a printed circuit board fixing structure that can disperse stress without concentrating it on a fixed part of the printed circuit board when operating an operating part.

[0007]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides a printed circuit board fixing structure for fixing a printed circuit board on which operating parts are mounted to a fixed object, the peripheral edge of the printed circuit board being attached to the fixed object. A groove is provided to slide the part into.
A printed circuit board contact portion and a return prevention portion are provided in the groove, and when the printed circuit board reaches a fixed position, the leading end of the printed circuit board contacts the contact portion and the rear end of the printed circuit board is prevented from returning. It is characterized by being prevented from coming off at the part.

[0008]

[Operation] With the above configuration, when the peripheral edge of the printed circuit board is slid into the groove provided in the fixed object of the printed circuit board and the printed circuit board reaches the position where it should be fixed, the tip of the printed circuit board will be In addition to contacting the contact portion provided in the groove, the rear end of the printed circuit board is prevented from coming off by the return prevention portion provided in the groove.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a printed circuit board fixing structure according to the present invention will be described in detail below with reference to FIGS. 1 to 3. Figure 1
is an exploded perspective view showing the printed circuit board fixing structure, and FIG.
3 is a perspective view of a main part showing a return prevention part provided in a groove, and FIG.
FIG. 2 is a perspective view of a main part showing a contact portion provided in a groove.

The cover 1, which corresponds to the fixed object, differs from the conventional example in that the right side of the cover 1 is open, and on the inside of the two opposing sides, there are strip-shaped ribs parallel to the top surface of the cover 1. 1h are provided, and grooves 1e each having a U-shaped cross section are formed into which the upper and lower ends 2e, 2e corresponding to the peripheral edge of the printed circuit board 2 can be slidably inserted. As shown in FIG. 3, a wall 1f corresponding to a contact portion is formed at the left end of each groove 1e, and the groove 1e is closed here. Further, the right end of each groove 1e is open, and as shown in FIG. 2, a pair of claws 1g corresponding to a return prevention portion are formed at the right end of each groove 1e. Furthermore, the printed circuit board 2 differs from the conventional example in that it does not have the six fixing holes 2c shown in FIG.

The interval between the grooves 1e, 1e is such that the width of the printed circuit board 2 is just enough to slide the printed circuit board 2 into both the grooves 1e, 1e. The width of the groove 1e is made slightly wider than the thickness of the printed circuit board 2, and the distance G between the tips of the pair of claws 1g is made slightly narrower than the thickness of the printed circuit board 2.

Furthermore, when the printed circuit board 2 is slid in the direction of arrow B in FIG. 1 from the right end of the groove 1e and the left end 2f of the printed circuit board 2 comes into contact with the wall 1f, the three light emitting elements 2a are located directly below the three display windows 1a, and four pushbutton switches 2b are located directly below the four operation holes 1b, respectively. Furthermore, when the printed circuit board 2 is slid in the direction of arrow B in FIG. 1 from the right end of the groove 1e and the left end 2f of the printed circuit board 2 comes into contact with the wall 1f, the pair of claws 1g is formed at a position where it crosses over the claw 1g.

Therefore, from the open direction of the right side of the cover 1, the arrow B in FIG.
When the printed circuit board 2 is inserted in the direction shown in FIG. Since the spacing G is slightly expanded due to the elasticity of the rib 1h, the printed circuit board 2 is inserted into the groove 1e.
Slides can be inserted into.

Furthermore, when the printed circuit board 2 is slid into the groove 1e, the left end 2f of the printed circuit board 2 comes into contact with the wall 1f, and the right end 2g of the printed circuit board 2 gets over the claw 1g. Then, the distance G between the tips of the claws 1g becomes slightly narrower than the original thickness of the printed circuit board 2. Therefore,
The three light emitting elements 2a mounted on the printed circuit board 2 are located directly below the three display windows 1a, and the four push button switches 2b are located directly below the four operation holes 1b.
is positioned and fixed to the cover 1 by the wall 1f provided in the groove 1e and the claw 1g.

Therefore, the push button switch 2b can be removed from the operation hole 1b.
The stress applied to the printed circuit board 2 when pressed is
Via the upper and lower ends 2e, 2e corresponding to the peripheral edge of the printed circuit board 2, it is distributed and applied to the entire upper surface of the middle lower rib 1h provided on the inside of the two opposing side surfaces of the cover 1. Therefore, there is no possibility that the portion of the printed circuit board 2 fixed to the cover 1 will break. Note that the operating parts are not limited to push button switches, and it goes without saying that similar effects can be obtained with rotary operating type or sliding type operating parts.

Further, in this embodiment, since the right side of the cover 1 is open, a closing piece 4 is attached to the brim of the insole body 4, which is a synthetic resin molded product, which the cover 1 covers, in order to close the right side of the cover 1.
A is provided.

[0017]

[Effects of the Invention] Since the present invention is constructed as described above, the fixing of the printed circuit board on which the operating parts are mounted to the object to be fixed can be completed by simply sliding the board into the groove, which improves the efficiency of the fixing work. Since the stress applied to the fixed portion of the printed circuit board during operation is dispersed without being concentrated, it is possible to provide a printed circuit board fixing structure that does not cause cracks in the fixed portion of the printed circuit board.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a printed circuit board fixing structure according to the present invention.

FIG. 2 is a perspective view of a main part showing a return prevention part provided in a groove of an embodiment of the printed circuit board fixing structure according to the present invention.

FIG. 3 is a perspective view of a main part showing a contact portion provided in a groove of an embodiment of the printed circuit board fixing structure according to the present invention.

FIG. 4 is an exploded perspective view showing a conventional printed circuit board fixing structure.

[Explanation of symbols]

1 Fixed object 1e Groove 1f Contact part 1g Return prevention part 2 Printed circuit board 2b Operation parts 2e　　　Periphery of printed circuit board 2f　　　　Tip of printed circuit board 2g　　　Back end of printed circuit board

Claims (1)

[Claims] 1. A printed circuit board fixing structure for fixing a printed circuit board on which an operating component is mounted to a fixed object, wherein the fixed object is provided with a groove into which the peripheral edge of the printed circuit board is slidably inserted, and the printed circuit board is inserted into the groove. A contact portion and a return prevention portion are provided, and when the printed circuit board reaches a fixed position, the leading end of the printed circuit board abuts the contact portion and the rear end of the printed circuit board is prevented from coming off by the return prevention portion. A printed circuit board fixing structure characterized by: