JP2017062880A - Card edge connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a card edge connector that can suppress minute sliding of a contact portion between a circuit board and a terminal fitting to enhance connection reliability.SOLUTION: A card edge connector includes a first connector F provided with a circuit board 11, and a second connector S provided with a terminal fitting 20. An elastic contact portion 23 capable of coming into contact with a connecting portion 13 of the circuit board 11 is provided to a front-side portion of the terminal fitting 20 in a fitting direction to a first connector F. A second housing H is provided with a substrate housing portion 31 in which the connecting portion 13 of the circuit board 11 is housed under normal fitting. The second housing H includes a terminal holding portion 30 for holding the front-side portion of the terminal fitting 20 so that the elastic contact portion 23 faces the substrate housing portion 31, and a housing main body portion 40 for holding a rear-side portion of the terminal fitting 20. Under the normal fitting state of the first connector F and the second connector S, a front-side surface 14 of the first housing 10 in the fitting direction to the second housing H is set to be in contact with the housing main body portion 40.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a card edge connector.

  2. Description of the Related Art Conventionally, a card edge connector having a first connector provided with a circuit board and a second connector provided with terminal fittings connected to the circuit board is known. An elastic contact portion that can contact the connection portion of the circuit board is provided at the front portion of the terminal fitting provided in the second connector. Of the second connector, a second housing that holds the terminal fitting is formed with a board housing portion that accommodates the connection portion of the circuit board when properly fitting with the first connector. The terminal fitting is held by the second housing such that the elastic contact portion faces the substrate housing portion.

  In this type of card edge connector, it is known that the portion of the second housing in which the substrate housing portion is formed is formed separately from a material different from the other portions. For example, in the card edge connector described in Patent Document 1 below, the second housing has a terminal holding portion in which a board housing portion is formed and a housing main body portion formed separately. The terminal holding portion holds the front portion of the terminal fitting such that the elastic contact portion faces the substrate housing portion. In this way, the terminal holding portion can have a linear expansion coefficient comparable to that of the circuit board, and when the card edge connector becomes hot, the parallel pitch of the elastic contact portions of the terminal fitting and the circuit board It is possible to make it difficult for deviation to occur between the parallel pitches of the contact portions.

  The terminal holding portion is assembled to the housing main body portion by the elastic locking piece engaging with the locking step portion formed on the housing main body portion. When fitting the first connector and the second connector, the circuit board of the first connector is inserted into the board housing portion of the second connector, the elastic member is brought into close contact with the rear surface of the first connector, and the rear side Install the cap. In the normal fitting state of both connectors, the elastic member is elastically deformed so as to be crushed in the front-rear direction, the front surface of the first housing is elastically pressed against the front surface of the terminal holding portion, and the relative displacement in the front-rear direction of both housings Is regulated.

JP 2014-130722 A

  However, when the card edge connector configured as described above receives vibration, the first connector and the second connector are relatively rattled, and the terminal holding portion vibrates together with the housing body. For this reason, the elastic contact portion of the terminal fitting held by the terminal holding portion and the circuit board may be relatively rattled, and the contact portions between the circuit board and the terminal fitting may repeatedly slide slightly. Therefore, it has been desired to further improve the connection reliability by suppressing the slight sliding of the contact portion between the circuit board and the terminal fitting.

  The present invention has been completed based on the above situation, and a card edge connector capable of improving connection reliability by suppressing fine sliding of a contact portion between a circuit board and a terminal fitting. The purpose is to provide.

  The card edge connector according to the present invention includes a first connector provided with a circuit board and a second connector provided with a terminal fitting connected to the circuit board, and the first connector of the terminal fitting. An elastic contact portion capable of contacting the connection portion of the circuit board is provided in a front portion in the fitting direction, and the second housing that holds the terminal fitting in the second connector includes the first housing. A board housing part for housing the connection part of the circuit board is formed during normal fitting with the connector, and the second housing has a front part of the terminal fitting so that the elastic contact part faces the board housing part. A terminal holding part for holding, and a housing body part that is formed separately from the terminal holding part and holds a rear portion of the terminal fitting, and the first connector and the second connector Regular fitting In the state, the front face in the fitting direction with the second connector of the first housing for holding the circuit board of the first connector, the contact with the said housing body.

  According to the present invention, since the terminal holding part can be relatively displaced in the front-rear direction, the terminal holding part and the elastic contact part of the terminal fitting held by the terminal holding part follow the vibration of the circuit board. The connection reliability can be improved by suppressing the slight sliding of the contact portion with the terminal fitting.

Sectional drawing which is a card edge connector in a present Example, Comprising: The state before fitting a 1st connector and a 2nd connector Sectional drawing which shows the state which the 1st connector and the 2nd connector fitted normally The partially expanded sectional view which shows the state which the front surface of the 1st housing contacted the housing main-body part.

Preferred embodiments of the present invention are shown below.
In the card edge connector according to the present invention, the housing body has a hood part that can be fitted to the outside of the first housing, and a front surface of the first housing abuts against a rear wall of the hood part. It is good also as what will be in the state.

<Example>
Hereinafter, an embodiment embodying the present invention will be described in detail with reference to FIGS.
As shown in FIG. 1, the card edge connector in the present embodiment includes a first connector F provided with a circuit board 11 and a second connector S provided with a terminal fitting 20 connected to the circuit board 11. Have. Hereinafter, in each component member, the front side in the fitting direction with the mating connector (the first connector F on the right side in FIG. 1 and the second connector S on the left side in FIG. 1) is the front, and the opposite side is the rear. Further, the upper side of FIG. 1 will be described as the upper side, and the lower side will be described as the lower side.

  The first connector F is obtained by integrating the first housing 10 made of a synthetic resin and the circuit board 11 by molding. As a whole, the first housing 10 has a flat block shape in which a height dimension (vertical dimension) is set smaller than a width dimension (horizontal dimension). The first housing 10 is fitted inside the hood portion 42 of the second housing H. A lock protrusion 12 is provided on the upper surface (outer surface) of the first housing 10.

  The circuit board 11 is made of a glass epoxy resin material, and electronic components and the like (not shown) are mounted on both upper and lower surfaces (front and back surfaces) of the circuit board 11 to form a circuit. A front end portion of the circuit board 11 is a connection portion 13 with the terminal fitting 20 and protrudes forward from the front surface 14 of the first housing 10. On the upper and lower surfaces of the connecting portion 13, a plurality of contact portions (not shown) with which the elastic contact portions 23 of the terminal fitting 20 abut are arranged in parallel in the width direction. A portion of the circuit board 11 excluding the connection portion 13 is embedded in the first housing 10. The front surface 14 of the first housing 10 is a flat surface that is substantially perpendicular to the front-rear direction.

  The terminal fitting 20 is formed into an elongated shape in the front-rear direction as a whole by bending a metal plate material punched into a predetermined shape. A well-known box portion 21 is provided in the front portion of the terminal fitting 20, and a well-known crimp portion 22 is provided in the rear portion.

  The box portion 21 is provided with an elastic contact portion 23 that can contact the connection portion 13 of the circuit board 11. The elastic contact portion 23 protrudes outward from the box portion 21 in a natural state where it is not elastically deformed. The box portion 21 is provided with a locking portion 24 for locking a lance 45 described later from behind. The locking portion 24 is formed on the surface of the box portion 21 opposite to the side on which the elastic contact portion 23 is provided. The locking portion 24 is provided at an intermediate portion in the front-rear direction of the box portion 21, and is disposed at substantially the same position in the front-rear direction as the rear end of the elastic contact portion 23. A terminal portion of the electric wire 25 constituting the wire harness is crimped and connected to the crimping portion 22 of the terminal fitting 20.

  The second connector S includes a plurality of terminal fittings 20 accommodated in a second housing H made of synthetic resin. The plurality of terminal fittings 20 are arranged in two upper and lower stages inside the second housing H, and are arranged in parallel in the width direction. The elastic contact portions 23 of the plurality of terminal fittings 20 held by the second housing H are arranged at height positions corresponding to the upper and lower surfaces of the connection portion 13 of the circuit board 11 and are at the same pitch as the contact portions of the circuit board 11. Arranged in the width direction.

  The second housing H is formed with a board housing portion 31 in which the connection portion 13 of the circuit board 11 is housed when the first connector F is properly fitted. The substrate housing part 31 is formed to open forward. The substrate housing part 31 is provided in the central part in the height direction of the second housing H.

  The second housing H includes a terminal holding portion 30 that holds the front portion of the terminal fitting 20 so that the elastic contact portion 23 faces the substrate housing portion 31, and a housing main body portion 40 that holds the rear portion of the terminal fitting 20. ,have. The terminal holding part 30 and the housing main body part 40 are formed as separate bodies.

  The terminal holding part 30 is made of a material having the same linear expansion coefficient as that of the circuit board 11 and has a flat shape with the height dimension set smaller than the width dimension as a whole. The board housing part 31 is formed at the center of the terminal holding part 30 in the height direction.

  An abutting portion 32 that abuts against the housing main body 40 is provided on the rear side of the substrate housing portion 31 in the terminal holding portion 30. The abutting portion 32 abuts on a front end surface of an intermediate wall 44 of the housing main body portion 40 described later.

  The terminal holding portion 30 is provided with a front terminal storage chamber 33 in which a front portion of the terminal fitting 20 is stored. The front terminal accommodating chamber 33 accommodates a front end portion (a portion on the front side of the locking portion 24) including the elastic contact portion 23 of the box portion 21 of the terminal fitting 20. The front terminal housing chamber 33 is provided on both upper and lower sides with the substrate housing portion 31 in between. The front terminal housing chambers 33 communicate with the substrate housing portion 31, respectively.

  The terminal holding portion 30 is arranged along the front wall 34 standing along the front surface of the terminal fitting 20, the upper wall 35 arranged along the upper surface of the upper terminal fitting 20, and the lower surface of the lower terminal fitting 20. A lower wall 36 and a partition wall (not shown) for partitioning the front terminal housing chambers 33 adjacent in the left-right direction.

  The elastic contact portion 23 of the terminal fitting 20 held by the terminal holding portion 30 is in a state of protruding to the substrate housing portion 31 (see FIG. 1). The distance between the elastic contact portions 23 facing each other in the vertical direction is the plate thickness dimension (the vertical dimension) of the connection portion 13 of the circuit board 11 when the connection portion 13 of the circuit board 11 is not inserted into the board housing portion 31. It is set to be smaller. When the connection part 13 of the circuit board 11 is inserted into the board housing part 31, the upper and lower elastic contact parts 23 are elastically deformed upward and downward by contact with the circuit board 11 as shown in FIG. 2. In the normal fitting state between the first connector F and the second connector S, the upper and lower elastic contact portions 23 come into contact with the contact portions of the circuit board 11 while being elastically deformed, and a predetermined contact pressure is secured. At this time, the upper surface of the upper terminal fitting 20 is pressed against the upper wall 35 of the terminal holding portion 30, and the lower surface of the lower terminal fitting 20 is pressed against the lower wall 36 of the terminal holding portion 30. .

  The housing body 40 includes a terminal accommodating portion 41 that accommodates a rear portion of the terminal fitting 20 and a hood portion 42 that can be fitted to the outside of the first housing 10. In addition, the terminal holding part 30 is assembled | attached to the front side of the terminal accommodating part 41 by the well-known locking structure which is not shown in figure.

  The terminal accommodating portion 41 is provided with a rear terminal accommodating chamber 43 in which a rear portion of the terminal fitting 20 is accommodated. The rear terminal housing chamber 43 accommodates substantially the entire portion of the terminal fitting 20 excluding the portion housed in the terminal holding portion 30. The rear terminal housing chamber 43 is provided in an upper stage and a lower stage with the intermediate wall 44 in between. The intermediate wall 44 is formed at substantially the same height as the substrate housing part 31.

  Each rear terminal accommodating chamber 43 is provided with a lance 45 that is locked to the terminal fitting 20 to prevent it from coming off. The lances 45 are respectively provided on the wall portions (the upper wall 46 and the lower wall 47) facing the intermediate wall 44 in the upper and lower rear terminal accommodating chambers 43. The lance 45 has a cantilever shape with a free end on the front end side.

  The terminal accommodating portion 41 has an outer wall 48 that surrounds the outer peripheral side of the upper wall 46 and the lower wall 47. Between the outer wall 48 and the upper wall 46 and the lower wall 47, a bending space 49 that allows the lance 45 to be elastically displaced outward is provided. The lance 45 is pushed by the terminal fitting 20 inserted into the rear terminal accommodating chamber 43 and retracted to the outside, and when the terminal fitting 20 is inserted into a proper position, the lance 45 is elastically restored to the inside to lock the terminal fitting 20. Lock to the part 24.

  The hood part 42 is provided on the front side of the terminal accommodating part 41. The hood portion 42 has a cylindrical shape that is slightly larger than the terminal accommodating portion 41 and opens forward. The hood portion 42 is formed with a lock portion 51 on which the lock projection 12 of the first housing 10 can be locked. As shown in FIG. 2, a synthetic resin cap 55 is attached to the front end of the hood portion 42. The cap 55 is provided with a locking arm portion 57 that is locked to a locking recess 56 formed in the hood portion 42. An elastic member 58 made of a rubber material is disposed in close contact with the inner surface (rear surface) of the cap 55. When the cap 55 is assembled to the hood portion 42, the elastic member 58 is elastically crushed and deformed between the cap 55 and the first housing 10.

  A wall (hereinafter referred to as a back wall 52) formed at the rear end portion of the hood portion 42 is connected to the front end portion of the terminal accommodating portion 41. The back wall 52 has a shape that protrudes radially outward from the outer wall 48 of the terminal accommodating portion 41. The back wall 52 is formed continuously around the entire circumference of the outer wall 48 of the terminal accommodating portion 41.

  The front surface 53 of the back wall 52 is substantially perpendicular to the front-rear direction. The front surface 53 of the back wall 52 is positioned in front of the front surface 37 of the terminal holding unit 30. The front surface 37 of the terminal holding unit 30 is disposed at substantially the same position as the rear surface 54 of the back wall 52 in the front-rear direction.

  When fitting the first connector F and the second connector S configured as described above, the first connector F is inserted into the hood portion 42 of the second connector S, and the connection portion 13 of the circuit board 11 is connected. It is inserted into the substrate housing part 31. Thereafter, the elastic member 58 is brought into close contact with the rear surface of the first housing 10, and the cap 55 is brought into contact with the elastic member 58 and assembled to the hood portion 42. Then, the elastic member 58 is elastically deformed so as to be crushed in the front-rear direction, and the lock protrusion 12 is engaged with the lock portion 51, so that both the connectors F and S are held in a properly fitted state.

  In the normal fitting state of both connectors F and S, the elastic contact portion 23 of the upper terminal fitting 20 and the elastic contact portion 23 of the lower terminal fitting 20 are elastically abutted on the connection portion 13 of the circuit board 11, respectively. The circuit board 11 and the terminal fitting 20 are connected so as to be conductive. The front end surface of the circuit board 11 is in a state of being separated without contacting the contact portion 32.

  Moreover, in the normal fitting state of both the connectors F and S, the front surface 14 of the first housing 10 abuts against the housing body 40 and is held elastically by the elastic restoring force of the elastic member 58. . Specifically, the front surface 14 of the first housing 10 is held by the front surface 53 of the back wall 52 of the hood portion 42 of the second housing H in a state of being elastically pressed over the entire circumference. By this elastic pressing action, the relative displacement in the front-rear direction of both housings 10, H is limited. Further, due to the friction force generated between the two housings 10 and H due to the elastic pressing, the relative displacement in the direction (vertical and horizontal directions) intersecting the fitting direction of the two housings 10 and H is also limited. The At this time, a displacement allowance space 38 is formed between the front surface 14 of the first housing 10 and the front surface 37 of the terminal holding portion 30 to allow the terminal holding portion 30 to be relatively displaced forward.

  When the card edge connector in the normal fitting state is installed in a high vibration environment, the first connector F and the second connector S vibrate, and the circuit board 11 vibrates together with the first housing 10. The terminal holding part 30 is displaced following the circuit board 11 using the displacement allowable space 38, and the elastic contact part 23 of the terminal fitting 20 held by the terminal holding part 30 follows the vibration of the circuit board 11. Vibrate.

Next, operations and effects of the embodiment configured as described above will be described.
The card edge connector in the present embodiment includes a first connector F provided with a circuit board 11 and a second connector S provided with a terminal fitting 20 connected to the circuit board 11. An elastic contact portion 23 that can come into contact with the connection portion 13 of the circuit board 11 is provided at a front portion of the terminal fitting 20 in the fitting direction with the first connector F. Of the second connector S, the second housing H that holds the terminal fitting 20 is formed with a board accommodating portion 31 that accommodates the connection portion 13 of the circuit board 11 when properly engaged with the first connector F. The second housing H is formed separately from the terminal holding portion 30 and the terminal holding portion 30 so as to hold the front portion of the terminal fitting 20 so that the elastic contact portion 23 faces the board housing portion 31. And a housing main body 40 for holding a rear portion. In the normal fitting state between the first connector F and the second connector S, the front surface 14 of the first housing 10 that holds the circuit board 11 in the first connector F is in contact with the housing body 40.

  According to this configuration, since the terminal holding part 30 can be relatively displaced in the front-rear direction, the terminal holding part 30 and the elastic contact part 23 of the terminal fitting 20 held by the terminal holding part 30 follow the vibration of the circuit board 11. Therefore, it is possible to improve the connection reliability by suppressing the slight sliding of the contact portion between the circuit board 11 and the terminal fitting 20.

<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 above embodiment, the lance 45 is locked to the intermediate portion of the box portion 21 of the terminal fitting 20, but the lance is locked to the rear end of the box portion of the terminal fitting, for example. It is good. In such a case, substantially the entire box part of the terminal fitting may be accommodated in the terminal holding part.
(2) In the above embodiment, the terminal fitting 20 is in contact with both the front and back surfaces of the circuit board 11, but the present invention is a mode in which the terminal fitting is in contact with only one of the front and back surfaces of the circuit board. It can also be applied to the card edge connector.
(3) In the above embodiment, the front surface 53 of the back wall 52 of the hood portion 42 is positioned in front of the front surface 37 of the terminal holding portion 30. The displacement holding space is formed in front of the terminal holding part by projecting forward the portion of the front face of the first housing that contacts the front face of the back wall, located behind the front face of the terminal holding part. Also good.
(4) In the above embodiment, the first housing 10 and the circuit board 11 are integrated by molding. However, the present invention is not limited thereto, and the circuit board may be held by being assembled to the first housing. .
(5) In the above embodiment, the housing body 40 has the hood portion 42 that can be fitted to the outside of the first housing 10, and the front surface 14 of the first housing 10 is the back wall 52 of the hood portion 42. However, the present invention is not limited to this, and for example, the first housing has a hood portion that can be fitted to the outside of the housing main body portion, and the front end surface of the hood portion (the front surface of the first housing). However, it is good also as what contacts the part protrudingly provided by the outer surface of the housing main-body part.
(6) In the above embodiment, the front surface 14 of the first housing 10 is in contact with the front surface 53 of the back wall 52 of the hood portion 42 of the second housing H over the entire circumference. The front surface of the first housing may partially abut against the back wall of the second housing.

F ... 1st connector H ... 2nd housing S ... 2nd connector 10 ... 1st housing 11 ... Circuit board 13 ... Connection part 14 ... Front side of 1st housing in the fitting direction with 2nd housing (front side in fitting direction with 2nd housing Side)
DESCRIPTION OF SYMBOLS 20 ... Terminal metal fitting 23 ... Elastic contact part 30 ... Terminal holding part 31 ... Board | substrate accommodating part 40 ... Housing main-body part 42 ... Hood part 52 ... Back wall

Claims (2)

A first connector provided with a circuit board;
A second connector provided with a terminal fitting connected to the circuit board,
An elastic contact portion that can contact the connection portion of the circuit board is provided on the front portion of the terminal fitting in the fitting direction with the first connector,
Of the second connector, the second housing that holds the terminal fitting is formed with a board accommodating portion that accommodates the connection portion of the circuit board when properly engaged with the first connector,
The second housing is formed separately from the terminal holding portion and the terminal holding portion for holding the front side portion of the terminal fitting so that the elastic contact portion faces the board housing portion, and the rear of the terminal fitting. A housing main body holding the side portion,
In a normal fitting state between the first connector and the second connector, a front surface of the first housing that holds the circuit board in the fitting direction with the second connector is the housing. Card edge connector that comes into contact with the main body. The housing body has a hood that can be fitted to the outside of the first housing;
The card edge connector according to claim 1, wherein a front surface of the first housing is in contact with a rear wall of the hood portion.

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