JPH0234991A - Printed circuit board mounting device - Google Patents

Abstract

PURPOSE:To effectively connect electric connection parts by providing a guide plate for guiding a printed board, matching its electric connection part to the electric connection part of the inner wall of a depth side and engaging them. CONSTITUTION:A space 22 for containing a printed board 28 is provided in a containing box 21 as a main unit of a telephone set, a printed board 24 in which an electric connection part 23 such as a DIN connector is attached is secured to the inner wall of the depth side of the space 22, and guide rails 26 are provided at both upper and lower sides of the space 22. When the board 28 is inserted into the box and arrived at the vicinity of the inner wall in this manner, the board is guided to a guide plate 26, the connection part 29 of the board is matched to the electric connection part 23 of the inner wall to be engaged. Thus, even warped board can be easily and effectively contained in the box.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a mounting device for a printed circuit board mounted on a main unit of a telephone, a telephone exchange, or the like.

Conventional technology Printed circuit boards, which are removably installed inside the main device of telephones, have recently been made larger without increasing the number of printed circuit boards due to demands for increased functions, space savings, cost reductions, etc. There is a tendency to increase the number of electronic components mounted on a single board and to increase the density of circuit patterns.

A conventional printed circuit board mounting apparatus is shown in FIG.

A storage box 1 serving as a main unit of a telephone or a main body case of a telephone exchange is provided with a space 2 for storing a printed circuit board 8 to be described later. On the back inner wall of this storage space 2, there is a D
A printed circuit board 4 to which an electrical connection section 3 such as an IN connector is attached is fixed. Guide rails 6 are provided on the upper and lower walls of the storage space 2, respectively.

Reference numeral 8 indicates a printed circuit board, and the printed circuit board 8 is housed in the space 2 by inserting its upper and lower sides into each guide rail 6 of the storage space 2 . At the tip 8a of this printed circuit board 8, an electrical connection portion 9, which is a counterpart of the electrical connection portion 3, is provided.

Further, reference numeral 10 indicates a printed circuit board with a case attached. Case part 10 of this printed circuit board 10 with case
Insertion guides 10b are formed on the top and bottom of a, respectively.
This insertion guide 10b is inserted into the guide rail 6. At the tip 10d of the back plate part 10C of the printed circuit board 10 with a case, an electrical connection part 9 is attached, which is the counterpart of the electrical connection part 3 on the inner wall on the back side of the storage space 2, as in the case of the printed circuit board 8. It is being

Each of the electrical connection parts 3° 9 on the side of the storage box 1 and the printed circuit board 8 or the printed circuit board with case 10 is chamfered to compensate for mutual misalignment when the boards 8 and 10 are stored. ing.

Problem to be Solved by the Invention However, in the printed circuit board mounting device having the above structure, as the printed circuit board 8 or the board portion 10C becomes larger, warping of the board 8 and the like is inevitable.

Then, when the printed circuit board 8 is warped, as shown in FIG.
) from the ideal state of Figure 6(b) or Figure 6(
As shown in C), the electrical connection portion 9 is shifted from side to side.

If this displacement in the left and right directions is larger than the chamfering of each of the electrical connection parts 3 and 9, they will not be able to be inserted and fitted into each other. Therefore, there is a problem that the printed circuit board 8 cannot be made large.

This is a problem that similarly occurs in the case of the board portion 10C of the printed circuit board 10 with a case as the size increases.

Furthermore, if a highly rigid glass-filled epoxy resin material is used as the molding material for the printed circuit board 8 in order to prevent warping due to the increase in size of the printed circuit board 8, the cost will increase as this material itself is expensive. There is a problem.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a printed circuit board mounting device that is low cost and can reliably mount a printed circuit board regardless of the presence or absence of warpage.

Means for Solving the Problems In order to achieve the above object, the present invention provides a method for guiding a printed circuit board onto the inner wall of a storage box, aligning its electrical connection with the electrical connection on the inner wall, and inserting the printed circuit board into the inner wall of the storage box. It is equipped with a guide plate that allows the

In the printed circuit board mounting device having the above structure, when the printed circuit board is inserted into the storage box and reaches the vicinity of the inner wall, the board is guided by the guide plate, and the electrical connection between the electrical connection of the board and the inner wall is guided. and are aligned and fitted together. As a result, even a warped printed circuit board can be easily and reliably installed in the storage box.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

The overall configuration of the printed circuit board mounting device of the present invention is almost the same as the conventional printed circuit board mounting device described above. To summarize, as shown in FIG. A space 22 is provided to accommodate a printed circuit board 28, which will be described later.

On the back inner wall of this storage space 22, there is a printed circuit board 24 to which an electrical connection part 23 such as a DIN connector is attached.
is fixed. Guide rails 26 are provided on both upper and lower walls of the storage space 22, respectively.

Reference numeral 28 indicates a printed circuit board, and this printed circuit board 28 has its upper and lower sides connected to each guide rail 2 of the storage space 22.
6, it is housed in the space 22. At the tip 28a of this printed circuit board 28,
An electrical connection portion 29 that is a counterpart of the electrical connection portion 23
is provided.

Further, reference numeral 30 indicates a printed circuit board with a case attached. This printed circuit board 30 with a case has insertion guides 30b formed on the upper and lower sides of the case portion 30a, and the insertion guides 30b are inserted into the upper and lower guide rails 26. Printed circuit board with case 3
The printed circuit board 28 is located at the tip 30d of the board section 30C of 0.
Similarly to the above case, an electrical connection part 29 is attached to the inner wall of the storage space 22 on the far side to be a counterpart of the electrical connection part 23.

Then, each electrical connection part 23° 29 between the storage box 21 side and the printed circuit board 28 or printed circuit board 30 side with a case
are chamfered 23a and 29a, respectively, to compensate for mutual misalignment when the boards 28 and 30 are stored (see Figure 2).
is provided.

Then, the printed circuit board 24 on the inner wall on the back side of the storage space 22
To do this, guide the printed circuit board 28 or the printed circuit board 30C with a case and connect the electrical connection section 2.
A guide plate 33 is provided for aligning and fitting 9 into the electrical connection part 23 on the inner wall on the back side.

This guide plate 33 is connected to the storage space 2 as shown in FIG.
Electrical connection part 23 of printed circuit board 24 on the inner wall on the back side of 2
As shown in FIG. 3, it is sequentially enlarged toward the printed circuit board 28 or the circuit board section 30C so as to invite the printed circuit board 28 or the circuit board section 30C to form a V-shape. It has a cutout portion 33a. This notch 33a is formed from a V-shape 34 at its tip and a long groove 35 at its base.

The height H of the guide plate 33 is higher than the height h of the electrical connection part 23 on the back wall, and the printed circuit board 28 is in the cutout part 33a.
When the electrical connection part 29 is guided by the V-shaped part 34 and aligned with the electrical connection part 23 on the rear inner wall part, there is some gap between these electrical connection parts 23 and 29. is set to . Furthermore, the width C of the long groove part 35 of the notch part 33a is the same as that of the printed circuit board 28 or the board part 30C
The width is set as wide as υ.

Figure 4 (a) (b) (C) shows the printed circuit board 2
8 is successively pushed into the storage box 21, and the guide plate 33 absorbs the positional deviation E of the electrical connection part 29 due to the warpage of the printed circuit board 28, and shows the state in which the electrical connection part 29 is installed in a step-by-step manner.

FIG. 4(a) shows a state in which the printed circuit board 28, in which the electrical connection portion 29 is shifted by an amount E from its original position due to warpage, is pushed in and comes into contact with the guide plate 33. With the edge F of the printed circuit board 28 in contact with the wall surface of the V-shaped portion 34 of the notch 33a, each electrical connection portion 23.2
9 are separated by a distance J. The edge F of the printed circuit board 28 is pushed and slides on the wall surface of the V-shaped portion 34, as shown in FIG.
), it is guided to the center of the notch 33a. Thereby, the printed circuit board 28 enters the long groove part 35 of the notch part 33a, and the electrical connection part 29 is aligned with the electrical connection part 23 on the storage box 21 side. Finally, as shown in Figure 4 (
As shown in C), the electrical connections 23 and 29 are fitted together to complete the installation of the printed circuit board 28.

In addition, in the case of the printed circuit board 30 with a case, its board portion 30G functions in the same manner as the printed circuit board 28 described above.

As described above, conventionally, the printed circuit board 2 could not be absorbed by the chamfers 23a and 29a of each electrical connection part 23.29.
8 or electrical connection portion 29 due to warping of the substrate portion 30C
The positional deviation E of the printed circuit board 2 is caused by the guide plate 33.
8 or the cased printed circuit board 30 is gradually absorbed, and the electrical connections 23 and 29 are reliably connected to each other.

Note that the material of the guide plate 33 is the printed circuit board 28.
Alternatively, a plastic with a small coefficient of friction such as Giracon is used so that the guide can be performed without damaging the substrate portion 30C.

Further, in the embodiment, the V-shaped portion 3 of the cutout portion 33a
4 is formed in a straight line, but it may be formed in a curved V-shape to facilitate guiding of the printed circuit board 28 and the like.

Effects of the Invention As described above, according to the printed circuit board mounting device of the present invention, the printed circuit board is guided to the inner wall on the back side of the storage box, and its electrical connection portion is connected to the electrical connection portion on the inner wall on the back side. Since a guide plate is provided which is fitted in alignment with the guide plate, the following effects can be achieved.

(1) The guide plate absorbs the positional misalignment of the electrical connection parts due to the warping of the printed circuit board, which could not be absorbed by chamfering alone, making it possible to reliably connect the electrical connection parts to each other.

(2) By virtue of (1), it is possible to increase the size of the printed circuit board without causing problems with warping, and it is possible to increase the number of functions and save space.

(3) Even if the printed circuit board has a crack, there is no problem in inserting it, so the printed circuit board can be molded using inexpensive materials.
Cost reduction can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the printed circuit board mounting device of the present invention, FIG. 2 is a side sectional view showing main parts of the printed circuit board mounting device of FIG. 1, and FIG. 4(a) to (C) are horizontal sectional views showing the operating state when inserting the printed circuit board into the storage box, and FIG. 5 is the conventional printed circuit board. FIGS. 6A to 6C are perspective views showing the mounting device, and are partial cross-sectional views showing the upside-down state that occurs when a printed circuit board is inserted into the storage box of the printed circuit board mounting device shown in FIG. DESCRIPTION OF SYMBOLS 21...Storage box, 23...Electrical connection part on the inner wall on the back side of the storage space 22, 26...Guide rail on the upper and lower walls of the storage space 22, 28...Printed circuit board, 29... Electrical connection part of printed circuit board 28, 33... guide plate. Name of agent: Patent attorney Shige Takashi Awano and one other figure

Claims (1)

[Claims] A printed circuit board having an electrical connection part at the tip thereof, a mating electrical connection part to which the electrical connection part fits on the inner wall part, and guide rails on the upper and lower walls respectively, a storage box in which the printed circuit board is housed while being supported by the guide rail, and the electrical connection portions of the printed circuit board are fitted and connected to each other; A printed circuit board mounting device characterized by having a guide plate that is fitted in alignment with a connecting portion.