JP2017062881A - Card edge connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a card edge connector that can suppress sliding of the contact portion between a circuit board and a terminal fitting, thereby enhancing 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 connected to the circuit board 11. The terminal fitting 20 is provided with an elastic contact portion 23 capable of coming into contact with a connecting portion 13 of the circuit board 11, and 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 to the first connector F. The second housing H includes a terminal holding portion 30 for holding a front-side portion of the terminal fitting 20 so that an elastic contact portion 23 faces the substrate housing portion 31, and a housing main body portion 40 which is formed as a separate body from the terminal holding portion 30, and hold a rea-side portion of the terminal fitting 20. Under the normal fitting state between the first connector F and the second connector S, the front-side surface 15 of the circuit board 11 is set to be in contact with the back surface 39 of the board housing portion 31.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, in the configuration as described above, the circuit board is displaced forward due to thermal expansion of the first housing, the circuit board is displaced rearward due to thermal contraction, and the contact portions between the circuit board and the terminal fitting slide. May repeat. Therefore, it has been desired to further improve the connection reliability by suppressing the sliding of the contact portion between the circuit board and the terminal fitting.

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

  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 is formed for housing the connection part of the circuit board when normally fitted with the connector, and the second housing has the board housing part and the elastic contact part faces the board housing part. A terminal holding portion for holding a front side portion of the terminal fitting; and a housing main body portion formed separately from the terminal holding portion and holding a rear side portion of the terminal fitting, wherein the first connector In the normal fitting state between the first connector and the second connector, the front surface of the circuit board in the fitting direction with the second connector is in contact with the inner surface of the board housing portion. .

  According to the present invention, since the circuit board is not displaced forward even if the first housing is thermally expanded, it is possible to improve the connection reliability by suppressing the slight sliding of the contact portion between the circuit board and 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 Partially enlarged sectional view showing a state in which the front surface of the circuit board is in contact with the back surface of the substrate housing

Preferred embodiments of the present invention are shown below.
In the card edge connector according to the present invention, the front surface of the circuit board may be located in the vicinity of a contact portion of the connection portion that contacts the elastic contact portion. According to such a configuration, the projecting dimension of the circuit board from the first housing can be made smaller than when the front surface of the circuit board is formed farther forward than the contact portion. .

<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 front surface 15 of the circuit board 11 (the front surface of the circuit board 11 in the fitting direction with the second connector S) 15 is substantially perpendicular to the front-rear direction. The front surface 15 of the circuit board 11 is a flat surface having no unevenness in the front-rear direction over the entire width in the left-right direction. The front surface 15 of the circuit board 11 is located in the vicinity of the front side of the contact portion of the circuit board 11 over the entire width in the left-right direction. As shown in FIG. 2, the distance in the front-rear direction between the front surface 15 of the circuit board 11 and the contact portion is made smaller than the distance in the front-rear direction between the front surface 14 of the first housing 10 and the contact portion. .

  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 separately.

  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 has a dimension in the front-rear direction that is substantially constant over the entire width in the left-right direction. The dimension of the contact part 32 in the front-rear direction is smaller than the dimension of the substrate housing part 31 in the front-rear direction (half or less).

  A rear surface 38 of the abutting portion 32 abuts on a front surface 53 of an intermediate wall 44 of the housing main body 40 described later. The rear surface 38 of the contact portion 32 is substantially perpendicular to the front-rear direction. The rear surface 38 of the abutting portion 32 is a flat surface having no unevenness in the front-rear direction over the entire width in the left-right direction.

  The front surface of the contact portion 32 constitutes a back surface 39 of the substrate housing portion 31. The back surface 39 of the substrate housing part 31 is substantially perpendicular to the front-rear direction. The back surface 39 of the substrate housing part 31 is a flat surface having no front-rear unevenness over the entire width in the left-right direction.

  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. And a partition wall that partitions 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. The front surface 53 of the intermediate wall 44 is substantially perpendicular to the front-rear direction. The front surface 53 of the intermediate wall 44 is a flat surface having no front-rear unevenness over the entire width in the left-right direction.

  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 back wall 52 is located in front of the front surface 37 of the terminal holding unit 30.

  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.

  Further, in the normal fitting state of the connectors F and S, the front surface 15 of the circuit board 11 abuts against the back surface 39 of the board housing portion 31 and is elastically pressed by the elastic restoring force of the elastic member 58. Retained. By this elastic pressing action, the relative displacement in the front-rear direction of both housings 10, H is limited. The front surface 15 of the circuit board 11 abuts against the back surface 39 of the substrate housing 31 over the entire width in the left-right direction. At the same time, the rear surface 38 of the contact portion 32 contacts the front surface 53 of the intermediate wall 44 over the entire width in the left-right direction. The rear surface 38 of the contact portion 32 is linearly pressed against the front surface 53 of the intermediate wall 44 by a backward pressing force acting on the back surface 39 of the substrate housing portion 31.

  Thereby, the displacement to the front of the connection part 13 of the circuit board 11 is controlled. Further, the back end portion of the terminal holding portion 30 is linearly pressed by the circuit board 11, so that the backlash in the tilt direction of the terminal holding portion 30 is effectively suppressed. Note that the front surface 14 of the first housing 10 is in a state of being separated without contacting the back wall 52 of the hood portion 42.

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 15 of the circuit board 11 is in contact with the back surface 39 of the board housing portion 31.

  According to this configuration, since the connection portion 13 of the circuit board 11 is not displaced forward even if the first housing 10 is thermally expanded, the connection is performed while suppressing the slight sliding of the contact portion between the circuit board 11 and the terminal fitting 20. Reliability can be improved.

  The front surface 15 of the circuit board 11 is located in the vicinity of the contact portion of the circuit board 11. According to this configuration, the projecting dimension of the circuit board 11 from the first housing 10 can be made smaller than when the front surface 15 of the circuit board 11 is formed farther forward than the contact portion. .

<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 first housing 10 and the circuit board 11 are integrated by molding. However, the present invention is not limited to this, and the circuit board may be held by being assembled to the first housing. .
(4) In the above-described embodiment, the housing body 40 has the hood portion 42 that can be fitted to the outside of the first housing 10. However, the present invention is not limited to this. You may have the food | hood part which can be fitted outside.
(5) In the above-described embodiment, the front surface 15 of the circuit board 11 is a flat surface having no unevenness in the front-rear direction over the entire width in the left-right direction. However, the present invention is not limited thereto. You may have unevenness of a direction.
(6) In the above embodiment, the front surface 15 of the circuit board 11 is in contact with the back surface 39 of the substrate housing part 31 over the entire width in the left-right direction. It is good also as what touches a back surface partially.
(7) In the above embodiment, the front surface 15 of the circuit board 11 is located in the vicinity of the contact portion of the circuit board 11, but not limited to this, the front surface of the circuit board is farther to the front side than the contact portion. The protrusion dimension from the front surface of the first housing of the circuit board may be increased.

F ... 1st connector H ... 2nd housing S ... 2nd connector 11 ... Circuit board 13 ... Connection part of a circuit board 15 ... Front side of a circuit board (front side in the fitting direction with a 2nd connector among circuit boards)
DESCRIPTION OF SYMBOLS 20 ... Terminal metal fitting 23 ... Elastic contact part 30 ... Terminal holding part 31 ... Board | substrate accommodating part 39 ... Back surface of a board | substrate accommodating part 40 ... Housing main-body part

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 has the substrate housing portion and is formed separately from the terminal holding portion and a terminal holding portion that holds the front portion of the terminal fitting so that the elastic contact portion faces the substrate housing portion. A housing main body for holding a rear portion of the terminal fitting,
In a normal fitting state between the first connector and the second connector, a front surface of the circuit board in a fitting direction with the second connector is in contact with a back surface of the board housing portion. Card edge connector.   2. The card edge connector according to claim 1, wherein the front surface of the circuit board is positioned in the vicinity of a contact portion with which the elastic contact portion abuts among the connection portions.

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