JP2021118295A - Electric connection device - Google Patents

Abstract

To provide an electric connection device that can move two printed circuit boards to the proper position, correct the misalignment, and eliminate the distortion of a solder portion of each connector of both printed circuit boards.SOLUTION: An electric connection device includes a main unit 10 that holds a main board 14 on which a first connector 16 is mounted, a sub unit 20 that holds a sub substrate 24 on which a second connector 26 is mounted that can be fitted and connected to the first connector 16 and is fixed to the main unit, and a plurality of pairs of claws 27 that are provided on the sub unit and that hold the sub substrate by sandwiching both end edges of the sub substrate when the first connector and the second connector are connected by elastic deformation.SELECTED DRAWING: Figure 3

Description

The present invention relates to an electrical connection device in which a plurality of printed circuit boards mounted on each of them are mounted facing each other and connected to a connector.

Patent Document 1 describes an electrical connection device for assembling a second printed board to a first printed board. In this conventional electric connection device, the shake of the printed circuit board is regulated by first inserting the guide pin provided on the case side into the rough positioning hole of the second printed circuit board having low positioning accuracy. Rough positioning is performed on the printed circuit board connector. Subsequently, the positioning pin provided on the case side, which is a mounting member, is inserted into the positioning hole of the second printed plate having high positioning accuracy, so that the insertion points of both connectors are precisely positioned so as to match. Will be done.

Japanese Unexamined Patent Publication No. 8-213104 Japanese Unexamined Patent Publication No. 8-3330033

In the molded housing of a conventional electrical connection device, when both connectors of the first and second printed boards are mounted in the proper positions, it protects the solder part of both connectors from external force such as impact. It is effective as a structure. However, in reality, there are errors in the mounting positions of both connectors, the dimensional accuracy of the housing such as the cover that fixes the mounted printed board, and the assembly accuracy due to screw fixing, etc. Will have a quantity. For example, when the printed circuit board is housed in the unit, if the units are fitted in a misaligned state, the fitting gap between the units is reduced, or the play parts are reduced by fixing with screws. Immediately after assembly, stress was continuously applied to the solder parts of both connectors, which may cause a long-term solder crack and a reliability problem.

As one method for solving this problem, there is a structure in which a spring structure is provided in the connection terminal portion of the connector to absorb the deviation (see Patent Document 2), but there is a problem that the connector is expensive and the versatility is low. was there.

Therefore, the present invention has been made in view of the above points, and the printed circuit board (hereinafter, also simply referred to as a substrate) moves to an appropriate position to correct the displacement, and the solder portion of each connector of both printed circuit boards is distorted. It is an object of the present invention to provide an electric connection device capable of eliminating the above problems.

The electrical connection device of the present invention includes a first unit that holds a first substrate on which a first connector is mounted, and a first unit.
A second unit that holds a second substrate that mounts a second connector that can be fitted and connected to the first connector and is fixed to the first unit.
The second substrate is held by sandwiching both end edges of the second substrate provided in the second unit and when the first connector and the second connector are connected by elastic deformation. It is characterized by having a plurality of pairs of claws facing each other.

That is, in the electrical connection device of the present invention, the first substrate and the first connector mounted on the second substrate and the second A unit device in which a first unit and a second unit are connected via a connector, and at least one of the first substrate and the second substrate is held by an elastic claw portion in each unit. It is a unit device characterized by the above.

According to the present invention, when the units are connected to each other via the first connector and the second connector, the claws have a spring property even if the mounting positions of both connectors mounted on the units are misaligned. By fixing the substrate at the portion, it is possible to obtain an effect that the displacement of the moving position of the substrate can be corrected at an appropriate position and the distortion of the solder portion of the first connector and the second connector can be eliminated.

It is a perspective view which shows the main unit of the unit apparatus of this Example which concerns on Example of this invention. It is an exploded perspective view which shows the main unit of the unit apparatus of this Example. It is sectional drawing in line BB of FIG. It is a figure explaining the sub-board in the main unit of the unit apparatus of this Example, and is the front view of FIG. 4A and the cross-sectional view of the line BB (FIG. 4B). It is a figure explaining the sub holding cover in the main unit of the unit apparatus of this Example, and is the front view of FIG. 5A and the cross-sectional view of the line BB (FIG. 5B). It is a figure explaining the state that the sub-board in the main unit of the unit apparatus of this embodiment was held by the sub-holding cover of a subunit, and is the front view of FIG. FIG. 6 (b). It is a figure explaining the state of fitting the main holding cover and the main rear cover in the main unit of the unit apparatus of this Example, and is the front view of FIG. 7A and the cross-sectional view in line BB thereof (FIG. 7). (B)). It is a figure explaining the state that the sub holding cover in the main unit of the unit apparatus of this Example was held by the main holding cover of a main unit, and is the front view of FIG. 8A and the cross-sectional view in line BB. (Fig. 8 (b)).

The electrical connection device will be described below by taking the unit device of the embodiment of the present invention as an example. In the following description and the accompanying drawings, substantially the same or equivalent parts are designated by the same reference numerals, and duplicate description will be omitted. Further, for convenience of explanation, the front side is determined as shown in the figure, the opposite side is defined as the rear side, and the left, right, upper and lower sides when viewed from the front side are defined as the left side, the right side, the upper side and the lower side, respectively.

(Explanation of configuration)
1 to 3 show the main unit 10 (first unit) of the unit device of the embodiment. FIG. 1 is a perspective view showing the main unit 10, FIG. 2 is an exploded perspective view showing the main unit 10, and FIG. 3 is a partial cross-sectional view taken along the line BB of FIG.

As shown in FIG. 1, the main unit 10 of the unit device has a substantially rectangular parallelepiped appearance, and is an assembly in which the main front cover 11, the main holding cover 12, and the main rear cover 13 are overlapped. A printed circuit board on which various electronic components are mounted is built in the main unit 10, but for the sake of brevity, the electronic components and cables between the electronic components are omitted except for the connector. Further, switches such as an operation panel in the appearance of the main unit 10 are also omitted.

The main unit 10 holds the subunit 20 (second unit) between the main front cover 11 and the main holding cover 12. A recess RS having a substantially similar shape is formed on the front side of the main holding cover 12 so that the subunit 20 can be fitted. The subunit 20 is fitted into the recess RS and fixed with screws 25. That is, it is fixed to the female screw (not shown) through the opening 25S of the subunit 20 with four male screws 25.

The main board 14 (first board) is fixed and housed in the internal space formed by fitting the main holding cover 12 and the main rear cover 13 of the main unit 10. The main board 14 is sandwiched between the main holding cover 12 and the main rear cover 13 and fixed with screws 15 (see FIG. 3).

The main board 14 has a first connector 16 for connecting to the sub board 24 (second board) mounted on the front side surface. An opening 16S for connecting to the sub-board 24 (for the first connector 16) is provided on the bottom surface of the recess RS of the main holding cover 12.

The subunit 20 is composed of a sub front cover 21 and a sub holding cover 22 that are fitted to each other to form an internal space, and holds the sub substrate 24 in the internal space. The sub-board 24 has a second connector 26 for connecting to the main board 14 mounted on the rear side surface. The sub-holding cover 22 is provided with an opening 26S (see FIGS. 3 and 5) for connecting to the main board 14 (for the second connector 26).

The subunit 20 has a plurality of pairs (two pairs) of claw portions 27 provided around the opening 26S of the subunit holding cover 22. Further, each pair of the claw portions 27 sandwiches the sub-board 24 by elastically deforming two sets of both end edges of the four sides of the sub-board 24 when the first connector 16 and the second connector 26 are connected. Hold. It is preferable that each pair of the claw portions 27 faces each other.

The subunit 20 further has support ribs PR (4 pieces: see FIG. 5) that are located between the opening 26S of the sub-holding cover 22 and the claw portion 27 and project to the front side. The strut rib PR is located between the pairs of the protruding wall PDs of the claws 27 and protrudes toward the protruding wall as low as the plate thickness TK of the sub-board 24 (see FIG. 6).

Each pair of claws of the sub-holding cover 22 is arranged in parallel facing each other with a predetermined distance (approximately the width) in the width direction of both end edges of the sub-board 24. Since the claw portion 27 has elasticity, it has a spring structure capable of flexibly moving left, right, up and down with the sub substrate 24 sandwiched between the tips of the support ribs PR of the sub holding cover 22. The strut rib PR also functions as a support for the sub-board 24. In this way, the strain stress of the connector solder portion generated at the time of fitting due to the displacement of the mounting positions of the first connector 16 and the second connector 26 can be released by the movement of the substrate supported by the claw portion 27.
(Explanation of assembly)
The sub-board 24 on which the second connector 26 shown in FIG. 4 is mounted is centered on the four claws 27 so that the second connector 26 passes through the opening 26S of the sub-holding cover 22 shown in FIG. Push into. Therefore, as shown in FIG. 6, the sub-board 24 is held by the elasticity of the claw portion 27.

Each pair of the claw portions 27 includes contact surface BTs arranged in parallel facing each other with a predetermined distance in the width direction of the sub-board 24. Both ends of the sub-board 24 are sandwiched between the facing contact surfaces BT.

Each pair of claws 27 is provided with protruding wall PDs (hooks) that project from the contact surface BT so as to face each other in the width direction of the sub-board 24. The protruding wall PD prevents the sub-board 24 from coming off to the front side.

Each pair of claws 27 includes leg LGs that define a predetermined height from the bottom surface of the subunit cover 22 of the subunit 20 to the protruding wall PD. The predetermined height is a height that secures the fitting of the second connector 26 with the first connector 16.

Each tip of the claw portion 27 is provided with a tapered surface TP that is inclined toward the second connector 26 along the normal direction of the sub-board 24. The tapered surface TP ensures the ease of fitting the sub-board 24 from the front side to the rear side.

The leg LG is formed so as to be obliquely or curved CL from the protruding wall PD with respect to the sub-board 24. Elasticity can be adjusted by oblique or curved CL.

Each pair of claws 27 is integrally molded with the subunit 20 while standing from the bottom surface of the subunit holding cover 22 of the subunit 20.

As the resin material for integral molding of the sub-holding cover 22, even if it is formed by using engineering plastics such as ABS (acrylic nitrile butadiene styrene), ASA (acrylate styrene acrylic nitrile), and AES (acrylonitrile ethylene-propylene-diene styrene). good. Further, a part (claw portion or the like) of the sub-holding cover 22 may be formed by using a metal material.

(Explanation of operation)
As shown in FIG. 3, the main board 14 fixed to the main rear cover 13 of the main unit 10 with screws 15 and the sub board 24 held by the claws 27 on the sub unit 20 are mounted on the respective boards. Even if the mounting positions of the first connector 16 and the second connector 26 are displaced when the first connector 16 and the second connector 26 are fitted and connected, the sub-board incorporated in the sub-unit 20 is used. The 24 moves left and right and up and down due to the elasticity of the claw portion 27, and moves to an appropriate position to correct the mounting position deviation of the first connector 16 and the second connector 26.

(Explanation of effect)
As described above, according to the embodiment, even if the main unit 10 and the subunit 20 are combined in a state where the mounting positions of the first connector 16 and the second connector 26 are displaced, the first connector 16 of each other is used. And the stress on the solder portion of the second connector 26 can be reduced. Therefore, the reliability of the solder crack problem due to long-term stress can be improved. Further, since the sub-board 24 can be fitted between the pairs of the claws 27 of the sub-holding cover 22 when the sub-board 24 is mounted, the effect of reducing the man-hours for assembling the subunit 20 can be expected.

(Modification example)
In the embodiment, only the case where the substrate is held by the spring-loaded claw portion 27 on the substrate side of the subunit 20 has been described, but the main unit 10 is held on the substrate side or both substrates are held by the claw portion 27. Even in such a case, the deviation correction can be realized by moving each substrate, and the same or higher effect can be expected.

10 Main unit 14 Main board 16 First connector 20 Sub unit 24 Sub board 26 Second connector 27 Claw

Claims (7)

A first unit that holds a first board on which the first connector is mounted,
A second unit that holds a second substrate that mounts a second connector that can be fitted and connected to the first connector and is fixed to the first unit.
The second substrate is held by sandwiching both end edges of the second substrate provided in the second unit and when the first connector and the second connector are connected by elastic deformation. An electrical connection device comprising a plurality of pairs of claws facing each other. Each pair of the claw portions faces each other in the width direction of the second substrate from the contact surface with the contact surfaces arranged in parallel facing each other with a predetermined distance in the width direction of the second substrate. It is provided with a protruding wall that projects from the second unit and a leg that defines a predetermined height from the second unit to the protruding wall.
The electrical connection device according to claim 1. The electrical connection device according to claim 2, wherein the legs are formed so as to be obliquely or curved from the protruding wall with respect to the second substrate. The claim is characterized in that the second unit has a strut rib located between a pair of the protruding walls of the claw portion and projecting toward the protruding wall by a plate thickness lower than that of the second substrate. Item 2. The electrical connection device according to item 2 or 3. Any of claims 1 to 4, wherein each tip of the claw portion has a tapered surface that is inclined toward the second connector along the normal direction of the second substrate. The electrical connector according to paragraph 1. The electrical connection according to any one of claims 1 to 5, wherein each pair of the claw portions is integrally molded with the second unit while standing from the second unit. Device. Both ends of the first substrate provided in the first unit and when the first connector and the second connector are connected are sandwiched by elastic deformation to hold the first substrate. The electrical connection device according to any one of claims 1 to 6, further comprising a plurality of pairs of claws facing each other.

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