JP2016024942A - Card edge connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve contact reliability without increasing a number of components.SOLUTION: A first housing 10 has a pair of opposite portions 15 facing a substrate storing space 18 and opposing to each other, and a coupling portion 16 coupling rear end portions of the pair of the opposite portions 15. The opposite portion 15 is provided with a terminal fitting 30 having an elastically contacting portion 31 projecting out to the substrate storing space 18 side. In a process that a circuit substrate 22 is inserted in the substrate storing space 18, a projecting portion 19 interferes with the circuit substrate 22, thereby elastically and respectively displacing so as to separate the opposite portions 15, and the elastically contacting portions 31 retract from the substrate storing space 18. When the circuit substrate 22 is inserted in a normal connecting position, the projecting portion 19 is stored in a recessed portion 24, and the opposite portions 15 are relatively displaced so as to bring the opposite portions 15 close to each other, and the elastically contacting portions 31 elastically abut on the circuit substrate 22 in the substrate storing space 18.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a card edge connector.

  Patent Document 1 discloses a card edge connector including a housing having a board housing space and a plurality of terminal fittings housed in the housing and arranged to face each other across the board housing space. The card edge connector comes into contact with a circuit board inserted into the board housing space in a state where elastic pieces provided on the plurality of terminal fittings are elastically deformed. A predetermined contact pressure is ensured between the terminal fitting and the circuit board by the elastic contact action of the elastic piece. Further, the elastic pieces are elastically deformed, so that dimensional tolerances of the housing, the terminal fitting, and the circuit board are absorbed. Therefore, a structure in which the elastic piece abuts on the circuit board in an elastically deformed state is necessary for ensuring contact reliability between the terminal fitting and the circuit board.

  However, the structure in which the elastic piece abuts on the circuit board in an elastically deformed state is such that the corner edge at the tip of the circuit board in the insertion direction hits the elastic piece in the process of connecting the circuit board into the board housing space. It means that it rubs strongly with the elastic piece. Such bumping and rubbing may cause the elastic piece to be deformed improperly, the plating of the contact portion of the elastic piece to be peeled off, or a part of the corner edge of the circuit board to be scraped, and the shavings to be removed from the elastic piece and the circuit There is a concern that it may be bitten between the substrate and eventually contact failure.

  Patent Document 2 describes a countermeasure plan. The card edge connector includes a pair of terminal holding members that are arranged so as to face the board housing space and that can be displaced so as to approach and separate from each other, and a spring member that biases the pair of terminal holding members in the approaching direction. I have. A terminal fitting is attached to each terminal holding member. In addition, the terminal holding member is formed with a convex portion that protrudes toward the board housing space, and the circuit board is formed with a concave portion that accommodates the convex portion when the circuit board is housed in the board housing space.

  According to this configuration, in the process of housing the circuit board in the board housing space, the protrusions interfere with the circuit board, so that the pair of terminal holding members are displaced away from each other. Interference is avoided or mitigated. Then, when the circuit board is inserted to the normal position in the board housing space, the convex part is housed in the recessed part by the biasing of the spring member, the terminal holding member approaches, and the elastic piece is against the circuit board. Connected with a predetermined contact pressure.

JP 2010-108620 A JP 2012-151005 A

  However, the card edge connector described in Patent Document 2 requires two terminal holding members facing each other across the board housing space as a member for holding the terminal fitting, and a spring member is provided separately from the terminal holding member. is necessary. Therefore, there is a problem that the number of parts is large.

  The present invention has been completed based on the above circumstances, and an object thereof is to realize improvement in contact reliability without increasing the number of parts.

The card edge connector of the present invention is
A first housing having a substrate housing space that opens in a slit shape to the front;
A pair of opposed portions made of synthetic resin provided in the first housing and arranged to face each other facing the substrate housing space;
A synthetic resin connecting portion that integrally connects the rear end portions of the pair of facing portions, and that can be elastically relatively displaced so that the pair of facing portions approach and separate from each other;
A terminal fitting attached to the facing portion and having an elastic contact portion protruding toward the substrate housing space;
A second housing having a circuit board inserted into the board housing space from the front side of the first housing;
A convex portion provided on one of the facing portion and the circuit board;
Comprising the opposing portion and a recess provided on the other of the circuit boards,
In the process of inserting the circuit board into the board housing space, the convex part interferes with the other of the opposing part and the circuit board, so that the pair of opposing parts are elastically relative to each other. And the elastic contact portion is displaced in a direction of retreating from the substrate housing space,
When the circuit board is inserted to the normal connection position in the board housing space, the convex part is housed in the concave part, and the pair of opposed parts are elastically displaced relatively so as to approach each other. The elastic contact portion is characterized in that the elastic contact portion elastically contacts the circuit board in the board housing space.

  In the process of inserting the circuit board into the board housing space, it is possible to avoid the elastic contact portion and the circuit board from being rubbed or abutted against each other. In addition, the pair of facing portions is a single member connected by the connecting portion, and elastically returns due to the elasticity of the facing portion or the connecting portion, so that the number of parts can be reduced.

Sectional drawing showing the state which the 1st housing and the 2nd housing fitted in the card edge connector of Example 1. Sectional drawing showing the fitting process of the 1st housing and the 2nd housing Front view of first housing Sectional view of the first housing Sectional view of the second housing

  (1) In the card edge connector of the present invention, both end portions in the width direction of the board housing space are open to the outer surfaces of the pair of facing portions, and the pair of facing portions are connected only by the connecting portion. Also good. According to this configuration, the pair of facing portions can be reliably separated over the entire width thereof, so that the circuit board and the elastic contact portion rub against each other or strike each other at both ends in the width direction of the facing portion. This can be avoided reliably.

  (2) In the card edge connector of the present invention, the convex portion may be formed integrally with the facing portion, and the concave portion may be formed on the circuit board. Since a circuit board is usually manufactured as a plate material having a constant thickness, when a convex portion is formed on the circuit board, another component is fixedly attached to or attached to the circuit board. However, forming the recesses on the circuit board only requires processing such as cutting, so that the number of parts does not increase. In addition, since the facing portion is made of synthetic resin, no separate parts are required when forming the convex portion.

  (3) In the card edge connector of the present invention, the convex portion and the concave portion may be arranged at a plurality of positions spaced in the width direction of the substrate housing space. According to this configuration, it is possible to stably avoid the interference between the elastic contact portion and the circuit board over the entire width region of the board housing space.

  (4) In the card edge connector of the present invention, the concave portion is formed in a form penetrating the circuit board, the convex portion formed in one of the opposing portions, and the convex portion formed in the other opposing portion. A convex part may be accommodated in one said recessed part from the front surface side and the back surface side of the said circuit board. According to this configuration, the number of recesses formed in the circuit board can be reduced.

<Example 1>
A first embodiment of the present invention will be described below with reference to FIGS. The card edge connector of this embodiment includes a first housing 10 and a second housing 20.

  The first housing 10 is configured by attaching an inner housing 14 made of synthetic resin in an outer housing 11 made of synthetic resin, and the front shape is a substantially rectangular shape that is long in the left-right direction (width direction) as a whole. The outer housing 11 includes a rectangular tube-shaped housing housing portion 12 opened forward (leftward in FIGS. 1, 2, and 4), and a cylindrical fitting portion 13 forward from the outer peripheral edge of the front end of the housing housing portion 12. It is prepared for.

  The inner housing 14 is configured by integrally forming a pair of vertically symmetric opposing portions 15 and a connecting portion 16 that connects the rear end portions of the pair of upper and lower opposing portions 15. A plurality of terminal fittings 30 elongated in the front-rear direction are accommodated in the upper facing portion 15 in parallel in the width direction. The terminal fitting 30 is formed with an elastic contact portion 31 that protrudes from the lower surface of the upper facing portion 15 (the surface facing the substrate housing space 18 described later). Also in the lower facing portion 15, a plurality of terminal fittings 30 elongated in the front-rear direction are accommodated in parallel in the width direction. The terminal fitting 30 is formed with an elastic contact portion 31 that protrudes from the upper surface of the lower facing portion 15 (the surface facing the substrate housing space 18 described later).

  The inner housing 14 is accommodated in the housing accommodating portion 12 of the outer housing 11 from the front. The accommodated inner housing 14 is held in a state of being attached in the outer housing 11 by locking the connecting portion 16 to the rear end portion of the housing accommodating portion 12. In a state where the inner housing 14 is attached to the housing accommodating portion 12, a bending space 17 is secured between the upper surface of the upper facing portion 15 and the inner upper surface of the housing accommodating portion 12, and the lower facing portion 15. A bending space 17 is also secured between the lower surface of the housing housing 12 and the inner and lower surfaces of the housing accommodating portion 12.

  A space between the pair of upper and lower opposed portions 15 serves as a board housing space 18 into which the circuit board 22 of the second housing 20 is inserted. Since the lower surface of the upper facing portion 15 and the upper surface of the lower facing portion 15 directly face the substrate housing space 18, the elastic contact portion 31 of the terminal fitting 30 accommodated in the upper facing portion 15 and The elastic contact portion 31 of the terminal fitting 30 accommodated in the lower facing portion 15 is in a state of protruding into the substrate accommodation space 18.

  The pair of opposed portions 15 are connected via the connecting portion 16 only at the rear end portion. That is, a region other than the rear end portion of the facing portion 15 is not in contact with the other facing portion 15. Accordingly, the substrate housing space 18 is opened in a slit shape that is long in the width direction toward the front, and is also opened in a slit shape that is elongated in the front-rear direction at both ends in the width direction (left and right direction). And each opposing part 15 can be elastically displaced to an up-down direction by using the rear-end part (connecting part 16) as a substantially fulcrum. In other words, the pair of opposed portions 15 can be elastically displaced relative to each other in the direction of being vertically separated from each other with the connecting portion 16 as a substantially fulcrum, and so as to approach each other vertically with the connecting portion 16 as a substantially fulcrum. It can be elastically displaced relatively.

  The second housing 20 is configured by attaching a circuit board 22 to a synthetic resin board holding member 21. A connection end edge portion 23 where a contact portion (not shown) with the elastic contact portion 31 of the circuit board 22 is arranged is a surface facing the first housing 10 in the substrate holding member 21 (in FIGS. 1, 2 and 5). It has a form protruding in the left-right direction (width direction) from the right side surface). The second housing 20 is fitted into the cylindrical fitting portion 13 from the front of the first housing 10. In a state where the second housing 20 is fitted in the cylindrical fitting portion 13 of the first housing 10, the connection edge 23 of the circuit board 22 is inserted into the board housing space 18. The inserted contact edge 23 is elastically contacted so that the elastic contact portion 31 is sandwiched from above and below.

  In a state where the circuit board 22 is not inserted into the substrate housing space 18 and the elastic contact portion 31 is not elastically bent, the minimum distance (minimum facing dimension) between the elastic contact portions 31 facing vertically in the substrate housing space 18 is the circuit. The dimension is set to be smaller than the plate thickness dimension (vertical dimension) of the substrate 22. Due to this dimensional difference, when the connecting edge 23 is inserted into the board housing space 18, the elastic contact part 31 comes into contact with the circuit board 22 while being elastically bent, and a predetermined contact pressure is secured. ing.

  However, providing the minimum facing dimension between the elastic contact portions 31 and the thickness dimension of the circuit board 22 (connection end edge part 23) is not possible in the process of inserting the circuit board 22 into the board accommodating space 18. It means that the corner edge portion of the connecting end edge portion 23 in the insertion direction hits the elastic contact portion 31 or rubs against the elastic contact portion 31 strongly. Such bumping and rubbing may cause the elastic contact portion 31 to be improperly deformed, the plating of the contact portion of the elastic contact portion 31 may be peeled off, or a part of the corner edge portion of the connection end edge portion 23 may be scraped off. There is a concern that the shavings may be caught between the elastic contact portion 31 and the circuit board 22 and eventually cause a contact failure.

  As a countermeasure, the convex portion 19 is formed on the first housing 10 side, and the concave portion 24 is formed on the second housing 20 side. The convex portion 19 is formed at the front end portion of the lower surface of the upper facing portion 15 so as to protrude into the substrate housing space 18. In the front-rear direction, the rear end of the convex portion 19 is disposed in front of the front end of the elastic contact portion 31 (that is, rearward in the insertion direction of the circuit board 22 with respect to the board housing space 18). Moreover, the convex part 19 is formed in four positions at equal intervals in the width direction. Two convex portions 19 on both sides of the four convex portions 19 are arranged at both end portions in the width direction of the facing portion 15 and the substrate housing space 18. In the width direction, the formation position of the convex portion 19 is a position that does not correspond to the elastic contact portion 31.

  Further, the front end portion on the upper surface of the lower facing portion 15 is also formed with a convex portion 19 that protrudes into the substrate housing space 18, as with the upper facing portion 15. In the front-rear direction, the rear end of the convex portion 19 is disposed at a position ahead of the front end of the elastic contact portion 31 (that is, a position corresponding to the upper convex portion 19). Also in the width direction, the lower convex portion 19 is arranged at four positions vertically opposite to the upper four convex portions 19.

  The recess 24 is formed in the connection end edge 23. The recess 24 has a configuration in which the connection edge 23 is vertically penetrated (in the plate thickness direction). When the housing is properly fitted in place of the first housing 10 and the circuit board 22 reaches the regular continuous position in the board housing space 18, all the convex portions 19 respectively enter the corresponding concave portions 24. It is like that. That is, the concave portion 24 is disposed at a position corresponding to the convex portion 19 in the width direction. In addition, the position of the concave portion 24 in the front-rear direction is a position corresponding to the convex portion 19 when the circuit board 22 is in the normal connection position.

  Next, the operation of this embodiment will be described. When the first housing 10 and the second housing 20 are not fitted, the inner housing 14 is not elastically bent, the vertical distance between the pair of facing portions 15 is minimum, and the distance between the upper and lower elastic contact portions 31 is also minimum. It has become. In this state, when the second housing 20 is fitted to the first housing 10, in the fitting process, the convex portion 19 is moved before the front end of the connection end edge portion 23 reaches the front end position of the elastic contact portion 31. It contacts the front end edge of the connection end edge 23.

  After this, as the insertion of the circuit board 22 proceeds due to interference between the convex portion 19 and the connecting edge portion 23, the upper and lower opposing portions 15 are elastic so as to be separated vertically with the rear end portion as a fulcrum. Relative displacement. Due to this elastic displacement, the upper facing portion 15 is separated from the upper surface of the connection end edge portion 23, and the lower facing portion 15 is separated from the lower surface of the connection end edge portion 23. Therefore, even if the insertion of the circuit board 22 progresses and the connection end edge 23 reaches a position where it overlaps with the elastic contact portion 31 in the front-rear direction, the connection end edge 23 and the elastic contact portion 31 abut against each other or rub against each other. Never do.

  When both housings are properly fitted and the circuit board 22 reaches a normal connection position, all the convex portions 19 enter the concave portions 24, and accordingly, the upper facing portion 15 is connected to the connection edge portion. While approaching the upper surface of 23, the lower facing portion 15 approaches the lower surface of the connection edge 23. By the approaching operation of the facing portion 15, the elastic contact portion 31 is elastically brought into contact with the connection end edge portion 23, and the terminal fitting 30 and the circuit board 22 are connected.

  As described above, the card edge connector of the present embodiment is inserted into the board housing space 18 from the front side of the first housing 10 having the board housing space 18 opening in a slit shape forward. And a second housing 20 having a circuit board 22. The first housing 10 is integrally formed with a pair of facing portions 15 made of synthetic resin and a connecting portion 16 made of synthetic resin. The pair of facing portions 15 are arranged so as to face each other facing the substrate housing space 18. The connecting portion 16 integrally connects the rear end portions of the pair of facing portions 15 so that the pair of facing portions 15 can be elastically relatively displaced so as to approach and separate from each other. A terminal fitting 30 having an elastic contact portion 31 protruding toward the substrate housing space 18 is attached to the facing portion 15. The opposing portion 15 is provided with a convex portion 19, and the circuit board 22 is provided with a concave portion 24.

  In the process in which the circuit board 22 is inserted into the board housing space 18, the protrusion 19 interferes with the circuit board 22, so that the pair of opposed parts 15 are elastically displaced so as to be separated from each other, and the elastic contact part 31. Is displaced in the direction of retreating from the substrate housing space 18. When the circuit board 22 is inserted to the normal connection position in the board housing space 18, the convex part 19 is housed in the concave part 24, and the pair of opposed parts 15 are elastically relatively displaced so as to approach each other. In addition, the elastic contact portion 31 is configured to elastically contact the circuit board 22 in the board housing space 18.

  According to this configuration, it is possible to avoid the elastic contact portion 31 and the circuit board 22 from being rubbed or abutted against each other in the process of inserting the circuit board 22 into the board housing space 18. In addition, since the pair of facing portions 15 is a single member connected by the connecting portion 16 and elastically returns due to the elasticity of the facing portion 15 or the connecting portion 16, the number of parts can be reduced.

  Further, both end portions in the width direction of the substrate housing space 18 are opened to the left and right outer surfaces of the pair of facing portions 15, and the pair of facing portions 15 are connected only by the connecting portion 16 at the rear end. According to this configuration, the pair of facing portions 15 can be reliably separated over the entire width thereof, so that the circuit board 22 and the elastic contact portion 31 are rubbed strongly at both ends in the width direction of the facing portion 15. Matching and hitting can be avoided reliably.

  Further, since the circuit board 22 is usually manufactured as a plate material having a constant thickness, when the convex portion 19 is formed on the circuit board 22, another component is fixedly attached to or attached to the circuit board 22. Therefore, in this embodiment, the convex portion 19 is formed integrally with the facing portion 15, and the concave portion 24 is formed on the circuit board 22. The formation of the recess 24 in the circuit board 22 can be performed only by machining such as cutting, so that the number of components does not increase. Further, since the facing portion 15 is made of synthetic resin, no separate parts are required when forming the convex portion 19.

  In addition, since the convex portion 19 and the concave portion 24 are arranged at a plurality of positions spaced in the width direction of the substrate housing space 18, the elastic contact portion 31 and the circuit board 22 are formed over the entire width region of the substrate housing space 18. Interference can be avoided stably.

  The concave portion 24 is formed in a form penetrating the circuit board 22, and the convex portion 19 formed on the upper facing portion 15 and the convex portion 19 formed on the lower facing portion 15 are formed on the circuit board 22. It is accommodated in one recess 24 from both the upper surface (front surface) side and the lower surface (back surface) side. According to this configuration, the number of recesses 24 formed on the circuit board 22 can be reduced as compared to the case where the bag path-like recesses 24 are formed on the upper and lower surfaces of the circuit board 22.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the said Example, although the terminal metal fitting was attached to both of a pair of opposing parts, you may attach a terminal metal fitting only to any one opposing part. In this case, the opposing portion on the side where the terminal fitting is not attached may not be elastically bent.
(2) In the above embodiment, the convex portions and the concave portions are arranged at a plurality of positions spaced in the width direction of the substrate housing space. However, the convex portions and the concave portions may be arranged only at one place in the width direction. .
(3) In the above embodiment, the convex part is formed only on the opposing part and the concave part is formed only on the circuit board, but the convex part may be formed only on the circuit board and the concave part may be formed only on the opposing part. In this case, the convex portion may be formed on both the facing portion and the circuit board, and the concave portion may be formed on both the facing portion and the circuit board.
(4) In the said Example, although a recessed part is a form which penetrates a circuit board, the form which dented the circuit board in the shape of a bag path may be sufficient as a recessed part.
(5) In the above embodiment, both ends in the width direction of the substrate housing space are opened outward. However, both ends in the width direction of the substrate housing space may be closed.

DESCRIPTION OF SYMBOLS 10 ... 1st housing 15 ... Opposing part 16 ... Connection part 18 ... Board | substrate accommodation space 19 ... Convex part 20 ... 2nd housing 22 ... Circuit board 24 ... Concave part 30 ... Terminal metal fitting 31 ... Elastic contact part

Claims (5)

A first housing having a substrate housing space that opens in a slit shape to the front;
A pair of opposed portions made of synthetic resin provided in the first housing and arranged to face each other facing the substrate housing space;
A synthetic resin connecting portion that integrally connects the rear end portions of the pair of facing portions, and that can be elastically relatively displaced so that the pair of facing portions approach and separate from each other;
A terminal fitting attached to the facing portion and having an elastic contact portion protruding toward the substrate housing space;
A second housing having a circuit board inserted into the board housing space from the front side of the first housing;
A convex portion provided on one of the facing portion and the circuit board;
Comprising the opposing portion and a recess provided on the other of the circuit boards,
In the process of inserting the circuit board into the board housing space, the convex part interferes with the other of the opposing part and the circuit board, so that the pair of opposing parts are elastically relative to each other. And the elastic contact portion is displaced in a direction of retreating from the substrate housing space,
When the circuit board is inserted to the normal connection position in the board housing space, the convex part is housed in the concave part, and the pair of opposed parts are elastically displaced relatively so as to approach each other. A card edge connector, wherein an elastic contact portion elastically contacts the circuit board in the board housing space. Both end portions in the width direction of the substrate housing space are open to the outer surfaces of the pair of opposed portions,
The card edge connector according to claim 1, wherein the pair of opposed portions are connected only by the connecting portion. The convex portion is formed integrally with the facing portion,
The card edge connector according to claim 1, wherein the recess is formed in the circuit board.   4. The card edge connector according to claim 1, wherein the convex portion and the concave portion are arranged at a plurality of positions spaced in the width direction of the substrate housing space. 5. . The recess is formed in a form penetrating the circuit board;
The convex portion formed on one of the opposing portions and the convex portion formed on the other opposing portion are accommodated in one concave portion from both the front and back sides of the circuit board. The card edge connector according to any one of claims 1 to 4, wherein the card edge connector is configured as follows.

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