JPH07263881A - Printed board attaching device - Google Patents

Abstract

PURPOSE:To provide a device of attaching a printed board of an equipment which can correspond to two kinds of products of different functions by using the same housing by a simple constitution. CONSTITUTION:In a printed board attaching device wherein one or both of two printed boards 6, 7 are fixed to a housing 1, and the two printed boards are partially laminated up and down and fixed when both the printed boards are fixed a pair of cut-out parts 8, 11 are provided to each one side of the printed boards and a pair of supporting parts 2 which are fitted to the cut-out part and fix a board are integrally formed in a housing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for mounting a printed circuit board, and more particularly to a device for mounting a printed circuit board in a device capable of handling two types of products having different functions using the same housing. It is a thing.

[0002]

2. Description of the Related Art Conventionally, in the case where products having different functions of low function and high function are accommodated in the same housing, the structure shown in FIG. 4 is used. That is, in FIG. 4, 15 is a device housing, and 16 is a printed circuit board. Two types of printed circuit boards 16 are available, one for standard function models and one for high function models.
It is fixed to the housing 15 by 7. This conventional technique has a problem that it is uneconomical to prepare two types of substrates in which most of the substrates are common.

Therefore, as shown in FIG. 5, a standard function model uses only the standard board 18, and a high function model uses the standard board 18.
In addition to the above, there is a configuration in which the additional function boards 19 are each screwed by screws 17. In this conventional example, in order to effectively use the arrangement space and reduce the number of parts and the number of assembling steps by reducing the number of screw fastening points, when mounting two boards, a part of the boards are superposed on each other and screwed at the same time. To be done.

[0004]

However, even in such a conventional technique, there is a problem in that the number of screws for fixing the board is large and the number of working steps and the number of parts are increased. Further, in this prior art, even when the standard board 18 arranged below is removed from the two overlapping boards at the time of repair or the like, the additional function board 19 arranged above must be removed. There was a problem that the workability was poor.

[0005]

In order to solve the above-mentioned problems of the prior art, the printed circuit board mounting apparatus according to the present invention fixes one or both of the two printed circuit boards to one housing. When fixing both printed circuit boards, in a printed circuit board fixing device configured to vertically and partially fix two printed circuit boards, a pair of cutouts are provided on one side of the printed circuit boards. A pair of support portions that engage with the cutout portion and fix the substrate are integrally formed in the housing, and the support portions include a first support step portion that abuts a lower surface of one printed circuit board, A second supporting step formed at a position slightly lower than the position where the first supporting step is formed plus the thickness of the printed circuit board to press and support the upper surface of one board; Under the printed circuit board And a third supporting step portion that abuts against, and is formed at a position slightly lower than the position where the thickness of the printed board is added to the height where the third supporting step portion is formed and presses the upper surface of the other board. And a fourth supporting step for supporting.

[0006]

Therefore, in the device for fixing a printed circuit board according to the present invention, one printed circuit board is held by the first and second supporting step portions, and the printed circuit board is partially overlapped with this one printed circuit board, and And the other printed circuit board is fixed by the fourth supporting step.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to an in-vehicle adapter of a mobile phone will be described below with reference to the drawings. Figure 1
In FIG. 1, reference numeral 1 denotes a housing of the vehicle-mounted adapter, and the housing 1
Is integrally formed with two supporting portions 2, and a screwing boss 3 for fixing the printed circuit board by sandwiching the supporting portion 2, an elastic locking piece 4, and a positioning boss 5 are integrally formed. To be done. Reference numerals 6 and 7 denote a standard function board and an additional function board as the first and second printed boards, respectively.
The standard function board 6 is a board for a charger, and the additional function board 7 is a board for control. Each of the substrates 6 and 7 is provided with a pair of engaging notches 8 and 11, and second engaging notches 9 and 10 are provided continuously to the engaging notches 8 and 11. ing. Reference numeral 10 denotes a screw hole provided on the standard function board 6, and a screw 14 is provided through the screw hole 10.
Thus, the standard function board 6 is fixed to the housing 1. Reference numeral 13 denotes an engagement hole provided in the additional function board 7, and the additional function board 7 is fixed to the housing 1 by the elastic engagement piece 4 through the engagement hole 13.

The support portion 2 has a shape as shown in FIG. That is, the support portion 2 includes a first support step portion 2a with which the lower surface of the standard function substrate 6 abuts, a second support step portion 2b with which the upper surface of the standard function substrate 6 abuts, and a lower surface of the additional function substrate 7. It has at least a third supporting step portion 2c that abuts and a fourth supporting step portion 2d that abuts the upper surface of the additional function substrate 7.
Then, when the height of the first supporting step portion 2a is h1, the height of the second supporting step portion is h2, and the thickness of the printed circuit boards 6 and 7 is T,

[0009]

[Equation 1]

The dimensions are determined so as to satisfy Therefore, forces F1 and F2 act in the vicinity of the engaging cutout portion 8 of the standard function substrate 6, and as a result, the standard function substrate 6 is elastically held by the second cutout portion 9. Become.

The additional function board 7 is also elastically held by the third and fourth support steps 2c and 2d. Further, the height of the third supporting step portion 2c is formed at a position slightly higher than that of the second supporting step portion, and as a result, the two substrates 6 and 7 are held in a position where they overlap with each other with a gap. Therefore, it is easy to attach and detach the substrate.

The first to fourth step portions 2a to 2d are symmetrically formed by the two support portions 2 and 2.

FIG. 3 is a view showing a high-performance model in which both the standard function board and the additional function boards 6 and 7 are fixed to the housing 1. As shown in the figure, the two substrates have the support portion 2 at one end.
The standard function board 6 is fixed by the screws 14, and the additional function board 7 is fixed by the elastic engagement pieces 4 while being held by being overlapped with each other. Note that the fixing of all the boards is independent of each other, and the standard function board 6
Only the standard function model that fixes only can be securely fixed. Even when two substrates are fixed, the other substrate can be removed without removing the other substrate.

[0014]

As described above, the printed circuit board mounting device according to the present invention uses the same housing and has different functions.
In a printed circuit board mounting device for equipment that can support various types of products, it is possible to securely mount the circuit board with an extremely simple structure, and even when two boards are fixed, the other board can be mounted. The other board can be removed without removing, and workability during service is good.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a printed circuit board mounting device according to the present invention.

FIG. 2 is a sectional view showing a main part of a printed circuit board mounting device according to the present invention.

FIG. 3 is a perspective view showing a main part of a printed circuit board mounting device according to the present invention.

FIG. 4 is a view showing a printed circuit board mounting device according to a conventional technique.

FIG. 5 is a diagram illustrating a printed circuit board mounting device according to a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 case 6 1st printed circuit board 7 2nd printed circuit board 8, 11 Notch part 2 Support part 2a 1st support step part 2b 2nd support step part 2c 3rd support step part 2d 4th support Steps 9 and 12 Second notch

Claims (3)

[Claims] 1. One or both of two printed circuit boards are fixed to one housing, and when both printed circuit boards are fixed, a part of the two printed circuit boards is vertically stacked and fixed. In the printed circuit board mounting device configured as described above, a pair of cutout portions is provided on one side of the printed circuit board, and a pair of support portions that engage with the cutout portions and fix the substrate are integrally formed in the housing. With
The supporting portion is located at a position slightly lower than the first supporting step portion that abuts the lower surface of one printed circuit board and the position where the thickness of the printed circuit board is added to the height where the first supporting step portion is formed. A second supporting step portion that presses and supports the upper surface of one substrate formed on the upper surface, a third supporting step portion that abuts the lower surface of the other printed circuit board, and a third supporting step portion And a fourth supporting step portion which is formed at a position slightly lower than the position where the thickness of the printed circuit board is added and presses and supports the upper surface of the other circuit board. 2. The printed circuit board mounting apparatus according to claim 1, wherein a third supporting step portion is formed at a position higher than the second supporting step portion. 3. The printed circuit board mounting device according to claim 1, wherein a second cutout portion is provided continuously to the cutout provided in the printed circuit board. apparatus.