JP6978956B2 - Electrical connector for circuit board and its assembly - Google Patents

Description

The present invention relates to an electric connector for a circuit board and an assembly thereof.

As a connector to be attached to the circuit board, it was decided that the housing would have a square frame-shaped peripheral wall with four side walls rising from the bottom wall facing the mounting surface of the circuit board, and multiple signal terminals would be provided on each of the four side walls. An electric connector for a circuit board is disclosed in Patent Document 1.

In Patent Document 1, the peripheral wall of the housing has a square frame shape, and the same number of signal terminals are held on each side wall, and each side wall has the same length in the terminal arrangement direction and has the same wall thickness. is doing.

Such a circuit board electric connector is inserted and removed from another circuit board electric connector mounted on another circuit board. When inserting or removing the connector, a force in the insertion / removal direction acts on the side walls of both connectors, and a force in the bending direction acts on the side wall due to a tilting twist of the connector to be pulled out, especially at the time of removal. The force in the bending direction has the direction of acting on one of a pair of side walls facing each other in one direction and another pair of side walls in a direction orthogonal to the side wall.

In the connector of Patent Document 1, the four side walls forming the square peripheral wall have the same length in the terminal arrangement direction and the same wall thickness, so that they can be used for external forces such as the force in the insertion / extraction direction and the force in the bending direction. On the other hand, it has the same strength.

JP-A-2010-123468

In the connector of Patent Document 1, all the side walls of the square-shaped peripheral wall have the same wall thickness and the same strength, but when trying to increase the strength against an external force, all the side walls become thicker. Will be done. On the other hand, in general, like other types of connectors, circuit board electrical connectors want to be smaller, especially the length of one side of the peripheral wall, that is, the length of the side wall in order to reduce the mounting area of the circuit board. There is a request. However, when trying to increase the strength of the connector of Patent Document 1, the wall thickness of each side wall becomes thick, and as a result, the side wall of the peripheral wall becomes long on any side, and miniaturization cannot be achieved.

Of the external forces acting on the connector, the unfavorable force on the side wall is the force in the bending direction received by the twisting of the mating connector. The reason is that the force in the insertion / removal direction due to the insertion / removal of the mating connector acts on the four side walls in a distributed manner, and the force in the bending direction due to prying acts only on any one pair of opposite side walls, and further, in the bending direction. The force itself exerts a higher stress on the base of the sidewall than the force in the insertion / extraction direction.

In view of such circumstances, it is an object of the present invention to provide an electric connector for a circuit board and an assembly thereof, which can cope with a force in a bending direction due to prying while reducing the size of the connector.

The electric connector for a circuit board and the assembly thereof according to the present invention are configured as follows.

<Electrical connector for circuit board>
An electric connector for a circuit board that is arranged on a mounting surface of a circuit board and whose direction perpendicular to the mounting surface is the insertion / extraction direction with the electric connector for the circuit board on the other side, and is held by the housing and the housing. The housing includes a plurality of signal terminals, and the housing has a bottom wall facing the mounting surface and a square frame-shaped peripheral wall that rises from the bottom wall in the insertion / removal direction and is formed by four side walls. In an electric connector for a circuit board in which the plurality of signal terminals are held on four side walls,
The four side walls have a pair of side walls extending along a first direction parallel to the mounting surface and another pair of side walls extending along a second direction perpendicular to the first direction. Ori,
An electric connector for a circuit board, wherein the wall thickness of the other pair of side walls is larger than the wall thickness of the pair of side walls.

In the present invention configured as described above, the wall thickness of one side wall of the pair of side walls and the other pair of side walls facing each other in the second direction and the first direction at right angles to each other is set to the other pair. By making it smaller than the side wall of the wall, the connector in the second direction in which the pair of side walls face each other can be miniaturized, and the other side wall having a wall thickness larger than that of the pair of side walls is transmitted via the terminal. Strength can be ensured by receiving bending stress due to rubbing. That is, by stipulating that the other pair of side walls be handled so as to receive bending stress due to prying in the second direction perpendicular to the first direction facing the other side wall, it is possible to cope with prying.

In the present invention, the housing has a corner portion connecting the pair of side walls and the other pair of side walls.
It is preferable that the height of the corner portion in the insertion / removal direction is formed higher than the height of the arrangement range of the plurality of signal terminals on each side wall. By doing so, at the start of mating with the mating connector, the mating connector is first guided by the above corner, and then guided by the side wall holding the terminal, so that the mating connector is displaced from the normal position. When the mating is attempted, the mating connector collides with the corner and is brought to the normal position before mating, so that the mating connector can be prevented from colliding with the terminal.

In the present invention, the corner may be provided with a metal fitting having a portion located on the outer surface of the housing. By doing so, even if the mating connector collides with the corner, the housing is protected by the metal fittings and is not damaged.

In the present invention, in the arrangement range of the plurality of signal terminals, the length of the pair of side walls is longer than the length of the other pair of side walls, and the wall thickness of the pair of side walls is the other. It can be configured to be smaller than the wall thickness of the pair of side walls. In other words, by thinning the side wall in the longitudinal direction of the connector, it is possible to reduce the size of the connector in a wide range.

In the present invention, the shape of the signal terminal held on the pair of side walls and the shape of the signal terminal held on the other pair of side walls can be formed differently.

<Assembly of electrical connector for circuit board>
This assembly is constructed as follows.

It has two circuit board electric connectors arranged on each mounting surface of two parallel circuit boards and fitted to each other with the direction perpendicular to the mounting surface as the insertion / extraction direction, and any circuit board electric connector. Also has a bottom wall facing the mounting surface and a square frame-shaped peripheral wall rising from the bottom wall in the insertion / removal direction and formed by four side walls, and a plurality of signal terminals are held on each side wall of the peripheral wall. In the assembly of electrical connectors for circuit boards
Each circuit board connector has a pair of side walls extending along a first direction parallel to the mounting surface and another pair of side walls extending along a second direction perpendicular to the first direction. And
An assembly of an electric connector for a circuit board, wherein the wall thickness of the other pair of side walls is larger than the wall thickness of the pair of side walls (13, 53).

Such an assembly is obtained by making the two electric connectors for a circuit board to be fitted have the configuration of the electric connector for a circuit board described above. According to such an assembly, in either of the two circuit board electrical connectors, the miniaturization of the connector in the second direction and the other pair of side walls facing it in the first direction at right angles to it are pryed. Can be accommodated.

As described above, in the circuit board electric connector and its assembly according to the present invention, among the four side walls forming the square frame-shaped peripheral wall, the first side wall is opposed to the pair of side walls facing each other in the second direction. Since it was decided to increase the wall thickness of the pair of side walls facing each other in the direction, the wall thickness of the side walls in the second direction was reduced to reduce the size of the connector in the second direction, and the connectors faced each other in the first direction. Another pair of side walls with a large wall thickness can cope with the force in the bending direction due to prying.

It is a perspective view which shows the plug electric connector for a circuit board (hereinafter, "plug connector") as one Embodiment of this invention in the state which attached to the circuit board. FIG. 3 is a perspective view showing a circuit board receptacle electric connector (hereinafter referred to as “receptacle connector”) as a mating connector for being fitted to the plug connector of FIG. 1 to form an assembly, in a state of being attached to another circuit board. The assembly of the plug connector of FIG. 1 and the receptacle connector of FIG. 2 is shown in the state before fitting of both connectors. The YZ plane at the center first signal terminal position in the arrangement direction of the first signal terminals in FIGS. 1 and 2. It is a cross-sectional view in. The assembly of the plug connector of FIG. 1 and the receptacle connector of FIG. 2 is shown in the state before fitting of both connectors. The ZX plane at the center second signal terminal position in the arrangement direction of the second signal terminal in FIGS. 1 and 2. It is a cross-sectional view in.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

In FIG. 1, the plug connector I is attached to the circuit board P1. The plug connector I is configured by attaching a first signal terminal 20, a second signal terminal 30, and a metal fitting 40 to a plug housing 10 made of an electrically insulating material.

The plug housing 10 has a bottom wall 11 having a square plate shape facing the mounting surface of the circuit board P1, and a square frame-shaped peripheral wall 12 rising from the periphery of the bottom wall 11. The peripheral wall 12 is formed of four side walls, a pair of side walls 13 extending along the first terminal arrangement direction X as the first direction, and a second terminal as the second direction perpendicular to the first direction. It has another pair of side walls 14 extending along the arrangement direction Y. That is, the pair of side walls 13 are arranged to face each other in the second terminal arrangement direction Y, and the other pair of side walls 14 are arranged to face each other in the first terminal arrangement direction X.

In FIG. 1, an orthogonal solid coordinate axis XYZ is set in space, and a direction in which a pair of side walls 13 of a peripheral wall 12 provided in the plug housing 10 of the plug connector I extends and holds the first signal terminals 20 in an array is the first direction. The direction in which the other pair of side walls 14 extend in the direction perpendicular to the one-terminal arrangement direction X and the direction in which the side wall 13 extends and hold the second signal terminal 30 in an array is defined as the second terminal arrangement direction Y. Therefore, the direction perpendicular to the bottom wall 11 located on the surface including the first terminal arrangement direction X and the second terminal arrangement direction Y is defined as the connector insertion / removal direction Z.

The pair of side walls 13 of the plug housing 10 and the other pair of side walls 14 are connected by corners 15 at four points forming their ends, and a peripheral wall 12 forming a square frame shape when viewed from the insertion / removal direction Z is formed. Is forming. A metal fitting 40 is arranged on the side wall 13 at both ends, that is, at a position closer to the corner 15 in the first terminal arrangement direction X, and a plurality of first signal terminals 20 are arranged between the metal fittings 40. The metal fitting 40 is bent in an L shape when viewed from the insertion / removal direction Z, and a part thereof extends beyond the corner portion 15 to the side wall 14 as described later. The side wall 14 holds a part of the metal fitting 40 in the vicinity of the corner 15 in the second terminal arrangement direction Y, and holds a plurality of second signal terminals 30 in an array between both corners 15. There is.

Inside the peripheral wall 12, a square frame-shaped inner fitting wall 16 is provided so as to stand up from the bottom wall 11 so as to be surrounded by the peripheral wall 12 at a position spaced from the peripheral wall 12. The inner fitting wall 16 has four walls extending parallel to the side wall 13 and the side wall 14, respectively.

The plug connector I attached to the circuit board P1 as shown in FIG. 1 is fitted to the receptacle connector II as a mating connector attached to another circuit board P2 as shown in FIG. 2, for example. As can be seen in FIG. 3, the receptacle connector II is arranged at a lower position, and the plug connector I is fitted to the receptacle connector II from above by turning the posture of FIG. 1 upside down.

Next, the first signal terminal 20, the metal fitting 40, and the second signal terminal 30 of the plug connector I will be described in order with reference to FIGS. 1, 3, and 4.

A plurality of first signal terminals 20 are held on the side wall 13 of the plug housing 10 at predetermined intervals along the first terminal arrangement direction X. In the present embodiment, the first signal terminal 20 is integrally molded with the plug housing 10 and is held by the side wall 13. The first signal terminal 20 is made by bending a metal strip-shaped material, and has an inner surface and an upper surface (lower surface in FIG. 3) of the side wall 13 and a held portion 21 which extends to a part of the outer surface and is held by the side wall 13. It has a connection portion 22 which is located on the bottom surface of the side wall 13 and extends outwardly and is solder-connected to the pad P1A-1 of the circuit board P1. The portion of the held portion 21 located on the inner surface and the portion located on the outer surface of the side wall 13 form an inner contact portion 21A and an outer contact portion 21B for contacting the mating terminal of the receptacle connector II, respectively. A stepped portion is formed at the end of the outer contact portion 21B to form a locking portion 21B-1.

The metal fitting 40 is located outside the arrangement range of the first signal terminal 20 in the first terminal arrangement direction X, is made by bending a metal strip-shaped material wider than the first signal terminal 20, and is used for inserting and removing a connector. It is bent in an L shape when viewed from the direction Z, and has a first metal fitting portion 40A located on the side wall 13 and a second metal fitting portion 40B located on the side wall 14. The first metal fitting portion 40A is integrally molded with the plug housing 10 and is held by the side wall 13 over the inner surface, the upper surface (lower sword in FIG. 3) and a part of the outer surface of the side wall 13 like the first signal terminal 20. It has a held portion 41 to be held, and a connecting portion 42 that wraps around the bottom surface from the inner surface side of the side wall 13 and extends outward, and is solder-connected to the pad P1A-2 of the circuit board P1. The portion of the held portion 41 located on the inner surface and the portion located on the outer surface of the side wall 13 form an inner contact portion 41A and an outer contact portion 41B for contacting the mating metal fitting of the receptacle connector II, respectively. A step portion is formed at the end of the outer contact portion 41B to form a lock portion 41B-1. On the other hand, the second metal fitting portion 40B is connected to the first metal fitting portion 40A via a connecting portion (not shown) embedded in the corner portion 15 of the plug housing 10, and a part thereof is connected to the upper surface of the side wall 14. It is located so that it is exposed from the top to the outside. The connection portion of the second metal fitting portion 40B, which is located on the side wall 14 and is solder-connected to the pad P1B-2 of the circuit board P1, protrudes from the portion embedded in the side wall 14 to the bottom surface and is located in a range facing the bottom surface. It does not appear in FIGS. 1 and 3. The metal fitting 40 can be used not only as a reinforcing metal fitting but also as a power supply terminal.

The second signal terminal 30 basically has a form similar to that of the first signal terminal 20, and a plurality of arrangements are held on the side wall 14 along the second terminal arrangement direction Y at predetermined intervals. The second signal terminal 30 is arranged between the second metal fittings 40B located at both ends in the second terminal arrangement direction Y. In the present embodiment, the second signal terminal 30 is integrally molded with the plug housing 10 and is held by the side wall 14. The second signal terminal 30 is made by bending a metal strip-shaped material, and has an inner surface and an upper surface (lower surface in FIG. 3) of the side wall 14 and a held portion 31 which extends to a part of the outer surface and is held by the side wall 14. It has a connection portion 32 which is located on the bottom surface of the side wall 14 and extends outwardly and is solder-connected to the pad P1B-1 of the circuit board P1. The side wall 14 holding the second signal terminal 30 has a larger wall thickness (wall thickness in the first terminal arrangement direction X) than the side wall 13 holding the first signal terminal 20. Therefore, the portion located on the upper surface of the side wall 14 of the held portion 31 is larger than the corresponding portion of the first signal terminal 20. The portion of the held portion 31 located on the inner surface and the portion located on the outer surface of the side wall 14 form an inner contact portion 31A and an outer contact portion 31B for contacting the mating terminal of the receptacle connector II, respectively. At the end of the outer contact portion 31B, a lock portion 31B-1 formed by immersing in a quadrangle is provided.

As seen in FIG. 2, the receptacle connector II as a mating connector fitted to the plug connector I is attached to a circuit board P2 different from the plug connector I. Also in this receptacle connector II, the same orthogonal solid coordinate axes XYZ as the plug connector I, that is, the first terminal arrangement direction X, the second terminal arrangement direction Y, and the connector height direction Z are set.

Similar to the case of the plug connector I, the receptacle connector II has a receptacle housing 50 made of an electrical insulating material to which a first signal terminal 60, a second signal terminal 70, a power supply terminal 80, and a metal fitting 90 are attached. It is configured.

The receptacle housing 50 has a central wall 51 having a rectangular plate shape facing the mounting surface of the circuit board P2 and also serving as a bottom wall, and a square frame-shaped peripheral wall 52 provided around the central wall 51. .. The peripheral wall 52 is formed from four side walls, and has a pair of side walls 53 extending along the first terminal arrangement direction X as the first direction and a second terminal arrangement as the second direction perpendicular to the first direction. It has another pair of side walls 54 extending along the direction Y. That is, the pair of side walls 53 are arranged to face each other in the second terminal arrangement direction Y, and the other pair of side walls 54 are arranged to face each other in the first terminal arrangement direction X. The side wall 53 and the side wall 54 are connected by a corner portion 55. The corner portion 55 is formed higher than the side wall 53 and the side wall 54 in the insertion / removal direction Z of the connector, and the tapered portion 55A is formed on the inner upper surface of the corner portion 55. A square annular fitting groove 56 into which the peripheral wall 12 of the plug connector I is fitted is formed between the central wall 51 and the peripheral wall 52. The outer peripheral edge of the central wall 51, that is, the peripheral edge of the central wall 51 on the fitting groove 56 side, accommodates the free end sides of the terminals of the first signal terminal 60, the power supply terminal 80, and the second signal terminal 70, which will be described later. The terminal free end side accommodating recesses 56A, 56B, 56C that allow elastic displacement on the free end side are formed.

The central wall 51 is provided with a square annular inner fitting annular groove 57 formed by being immersed in the connector in the insertion / removal direction Z, and the inner annular groove 57 is provided with the inner fitting wall 16 of the plug connector I. It is designed to fit.

Next, with reference to FIGS. 2 to 4, the first signal terminal 60, the power supply terminal 80, the metal fitting 90, and the second signal terminal 70 of the receptacle connector II will be described in order.

A plurality of first signal terminals 60 are held on the side wall 53 of the receptacle housing 50 at predetermined intervals along the first terminal arrangement direction X. In the present embodiment, the first signal terminal 60 is integrally molded with the receptacle housing 50 and is held by the side wall 53. The first signal terminal 60 is made by bending a metal strip-shaped material, has a portion that extends to the inner surface and the upper surface of the side wall 53 and is buried and held in the wall thickness of the side wall 53, and has an inverted U shape. The held portion 61, the connecting portion 62 located on the bottom surface of the side wall 53, extending outward, and solder-connected to the pad P2A-1 of the circuit board P2, and the U-shaped elasticity located in the fitting groove 56. It has an arm portion 63. A portion of the held portion 61 located on the inner surface of the side wall 53 forms an outer contact portion 61A for contacting the mating terminal of the plug connector I. An immersion portion is formed below the outer contact portion 61A, forming a lock portion 61A-1. Further, the free end side of the elastic arm portion 63 rises from the bottom position of the receptacle housing 50 in the terminal free end side accommodating recess 56A along the insertion / removal direction Z, and has a side wall on the tip end side (upper end in FIGS. 2 and 3). An inner contact portion 63A that is convexly curved toward the 53 side is formed. Thus, the second signal terminal 60 comes into contact with the first signal terminal 20 so as to sandwich the first signal terminal 20 of the plug connector I between the outer contact portion 61A and the inner contact portion 63A.

The power supply terminal 80 is located outside the arrangement range of the first signal terminals 60 arranged on the side wall 53, and is provided so as to be adjacent to the corner portion 55. In the present embodiment, the power supply terminal 80 is integrally molded with the receptacle housing 50 and is held by the side wall 53. The power supply terminal 80 is made by bending a metal strip-shaped material, has a larger width (dimension in the first terminal arrangement direction X) than the first signal terminal 60, and extends to the inner surface and the upper surface of the side wall 53. It has a portion to be buried and held in the wall thickness of 53, and has an inverted U-shaped held portion 81, which is located on the bottom surface side of the side wall 53 and extends outward, and is soldered to the pad P2A-2 of the circuit board P2. It has a connecting portion 82 to be connected and a U-shaped elastic arm portion 83 located in the fitting groove 56. The portion of the held portion 81 located on the inner surface of the side wall 53 is for contacting the mating power supply terminal of the plug connector I (the first metal fitting portion 40A when the metal fitting 40 of the plug connector I is used as the power supply terminal). The outer contact portion 81A is formed. An immersion portion is formed below the outer contact portion 81A, forming a lock portion 81A-1. Further, the free end side of the elastic arm portion 83 rises from the bottom position of the receptacle housing 50 in the terminal free end side accommodating recess 56B, and is curved inward toward the side wall 53 toward the tip end (upper end in FIG. 2). The contact portion 83A is formed. Thus, the power supply terminal 80 comes into contact with the metal fitting 40 so as to pinch the first metal fitting portion 40A of the metal fitting 40 of the plug connector I between the outer contact portion 81A and the inner contact portion 83A.

The metal fitting 90 is located outside the arrangement range of the first signal terminal 60 and the power supply terminal 80 in the first terminal arrangement direction X, and is made by bending a metal strip-shaped material wider than the second signal terminal 70 described later. It is bent in an L shape when viewed from the insertion / removal direction Z of the connector, and has a first metal fitting portion 90A located on the side wall 53 and a second metal fitting portion 90B located on the side wall 54. The first metal fitting portion 90A wraps around the held portion (hence not shown in the figure) embedded in the side wall 53 from the inner surface side of the side wall 53 to the bottom surface by integral molding with the receptacle housing 50. It has a connection portion 92A extending in the direction of the circuit board P2 and solder-connected to the pad P2A-3 of the circuit board P2. On the other hand, the second metal fitting portion 90B is connected to the first metal fitting portion 90A via a connecting portion (not shown) embedded in the corner portion 55, and is positioned so as to be exposed from the upper surface to the outer surface of the side wall 54. is doing. The connection portion 92B of the second metal fitting portion 90B, which is located on the side wall 54 and is solder-connected to the pad P2B-2 of the circuit board P2, faces the bottom surface of the side wall 54 and extends outward. The metal fitting 90 can be used not only as a reinforcing metal fitting but also as a power supply terminal.

The second signal terminal 70 basically has a form similar to that of the first signal terminal 60, and a plurality of arrangements are held on the side wall 54 in the second terminal arrangement direction Y at predetermined intervals. The second signal terminal 70 is arranged between the second metal fittings 90B located at both ends in the second terminal arrangement direction Y. In the present embodiment, the second signal terminal 70 is integrally molded with the receptacle housing 50 and is held by the side wall 54. The side wall 54 is set to have a larger wall thickness (thickness of the wall in the first terminal arrangement direction X) than the side wall 53 in which the first signal terminals 60 are arranged. Therefore, the side wall 54 is stronger than the side wall 53. The second signal terminal 70 is made by bending a metal strip-shaped material, has a portion that extends to the inner surface and the upper surface of the side wall 54 and is buried and held in the wall thickness of the side wall 54, and has an inverted U shape. The held portion 71, the connecting portion 72 located on the bottom surface of the side wall 54, extending outward, and solder-connected to the pad P2B-1 of the circuit board P2, and the U-shaped elastic arm located in the fitting groove 56. It has a unit 73. The portion of the held portion 71 located on the inner surface side of the side wall 54 forms the outer contact portion 71A for contacting the mating terminal of the plug connector I. Further, the free end side of the elastic arm portion 73 rises from the bottom position of the receptacle housing 50 in the terminal free end side accommodating recess 56C along the insertion / removal direction Z, and has a side wall on the tip end side (upper end in FIGS. 2 and 4). An inner contact portion 73A that is convexly curved toward the 54 side is formed. Thus, the second signal terminal 70 comes into contact with the second signal terminal 30 so as to sandwich the second signal terminal 30 of the plug connector I between the outer contact portion 71A and the inner contact portion 73A.

Such a plug connector I and a receptacle connector II of the present embodiment are used as a connector assembly in the following manner.

The plug connector I is attached to the circuit board P1, and the receptacle connector II is attached to the circuit board P2. In the plug connector I, the connection portion 22 of the first signal terminal 20 is connected to the pad P1A-1, the connection portion 42 of the first metal fitting portion 40A in the metal fitting 40 is connected to the pad P1A-2, and the connection portion of the second metal fitting portion 40B is connected (not shown). Is not attached) to the pad P1B-2, and the connection portion 32 of the second signal terminal 30 is solder-connected to the pad P1B-1 to be attached to the circuit board P1. On the other hand, in the receptacle connector II, the connection portion 62 of the first signal terminal 60 is on the pad P2A-1, the connection portion 82 of the power supply terminal 80 is on the pad P2A-2, and the connection portion 92 of the first metal fitting portion 90A in the metal fitting 90 is. The connection portion 92B of the second metal fitting portion 90B is solder-connected to the pad P2A-3 to the pad P2B-2, and is attached to the circuit board P2.

In this way, the plug connector I attached to the circuit board P1 and the receptacle connector II attached to the circuit board P2 are attached to each other as seen in FIGS. 3 and 4 in which the circuit boards P1 and P2 are not shown. After being arranged facing each other with the vertical direction as the connector insertion / removal direction Z, the peripheral wall 12 of the plug connector I is in the fitting groove 56 of the receptacle connector, and the inner fitting wall 16 of the plug connector I is in the receptacle connector II. It is connected by being inserted into each of the inner annular grooves 57.

Thus, the first signal terminal 20 and the second signal terminal 30 of the plug connector I are connected to the first signal terminal 60 and the second signal terminal 70 of the receptacle connector II, respectively, and further, the first of the metal fittings 40 of the plug connector I. The metal fitting portion 40A and the second metal fitting portion 40B are connected to the power supply terminal 80 and the metal fitting 90 of the receptacle connector II, respectively.

When the plug connector I is pulled out from the receptacle connector II, the plug connector I is lifted upward in the insertion / removal direction Z direction.

When the plug connector I is inserted into and removed from the receptacle connector II, especially when it is pulled out, the plug connector I is repeatedly tilted to one side and the other side with respect to the mounting surface of the circuit board P2 of the receptacle connector II, a so-called prying operation. Is often done. Such a prying operation may cause deformation or damage of each terminal or housing, which is not preferable. In the present embodiment, the direction of inclination in this prying is defined to be repeated in one and the other of the pair of side walls 14 facing each other in the first terminal arrangement direction X. The side wall 14 of the plug connector I facing in the first terminal arrangement direction X has a wall thickness larger than that of the side wall 13, and similarly, the side wall 54 of the receptacle connector II facing in the first terminal arrangement direction X has a wall thickness larger than that of the side wall 53. Is largely configured. With such a configuration, the side wall 14 and the side wall 54 can sufficiently withstand the bending stress due to prying. On the other hand, since the side wall 13 and the side wall 53 facing each other in the second terminal arrangement Y direction, which is not the direction of the prying operation, are not subjected to bending stress due to the prying operation, the wall thickness can be set small, and the plug connector I and the receptacle can be set small. For both the connector II, the dimension in the second terminal arrangement direction Y can be reduced by that amount.

In the present embodiment, the height of the corner 15 of the receptacle housing 50 of the receptacle connector II is the side wall 53 of the portion where the first signal terminal 60 is arranged and the side wall 54 of the portion where the second signal terminal 70 is arranged. It is formed higher in the insertion / removal direction Z of the connector than the height of. Therefore, even if the plug connector I is slightly displaced from the normal position and is inserted into the receptacle connector II, the plug connector I collides with the corner portion 15 without colliding with the first signal terminal 60 and the second signal terminal 70, and is normal. These signal terminals are protected because they are guided to the position. In particular, if the metal fittings are arranged at the corners 15, the protective function thereof is further enhanced.

In the present embodiment, both the plug connector I and the receptacle connector II are dimensionally related so that the wall thickness of the side wall is larger in the side wall extending in the second terminal arrangement direction Y than in the side wall extending in the first terminal arrangement direction X. However, if it is only necessary to improve the strength against prying in the first terminal arrangement direction X and reduce the size in the second terminal arrangement direction Y for only one of the two connectors, this one connector It is sufficient to set such a dimensional relationship.

In the present invention, if one pair of side walls is made longer in the terminal arrangement direction than the other pair of side walls and is allowed to be twisted so as to have an inclination in the direction of the other pair of side walls, the other. Since the pair of side walls is shorter than the pair of side walls, it is more resistant to bending stress due to prying.

10 (Plug) Housing 52 Circumferential wall 11 Bottom wall 53 Side wall 12 Peripheral wall 54 Side wall 13 Side wall 55 Corner 14 Side wall 60 (1st) Signal terminal 15 Corner 70 (2nd) Signal terminal 20 (1st) Signal terminal 90 Metal fittings 30 (2nd) Signal terminal P1 circuit board 40 metal fittings P2 circuit board 50 (receptacle) housing I (plug) connector 51 Central wall II (receptacle) connector

Claims (5)

An electric connector for a circuit board that is arranged on a mounting surface of a circuit board and whose direction perpendicular to the mounting surface is the insertion / extraction direction with the electric connector for the circuit board on the other side, and is held by the housing and the housing. The housing includes a plurality of signal terminals, and the housing has a bottom wall facing the mounting surface and a square frame-shaped peripheral wall that rises from the bottom wall in the insertion / removal direction and is formed by four side walls. In an electric connector for a circuit board in which the plurality of signal terminals are held on four side walls,
The four side walls have a pair of side walls extending along a first direction parallel to the mounting surface and another pair of side walls extending along a second direction perpendicular to the first direction. Ori,
The wall thickness of the other pair of side walls is configured to be larger than the wall thickness of the pair of side walls .
A plurality of the signal terminals are held on each of the four side walls.
An electric connector for a circuit board, characterized in that the shape of the signal terminal held on the pair of side walls and the shape of the signal terminal held on the other pair of side walls are different. The housing has a corner connecting the pair of side walls and the other pair of side walls.
The electric connector for a circuit board according to claim 1, wherein the height of the corner portion in the insertion / removal direction is formed higher than the height of the arrangement range of the plurality of signal terminals on each side wall. The circuit board electric connector according to claim 2, wherein a metal fitting having a portion located on an outer surface of the housing is provided in the corner portion. Within the arrangement range of the plurality of signal terminals, the length of the pair of side walls is longer than the length of the other pair of side walls, and the wall thickness of the pair of side walls is the wall thickness of the other pair of side walls. The electric connector for a circuit board according to claim 1, which is configured to be smaller than the wall thickness of the above. It has two circuit board electric connectors arranged on each mounting surface of two parallel circuit boards and fitted to each other with the direction perpendicular to the mounting surface as the insertion / extraction direction, and any circuit board electric connector. Also has a bottom wall facing the mounting surface and a square frame-shaped peripheral wall rising from the bottom wall in the insertion / removal direction and formed by four side walls, and a plurality of signal terminals are held on the four side walls. In the assembly of electrical connectors for circuit boards
Connector for any of the circuit board is also closed and a pair of side walls extending along a first direction parallel to the mounting surface, and another pair of side walls extending along a second direction perpendicular to said first direction And
The wall thickness of the other pair of side walls is configured to be larger than the wall thickness of the pair of side walls .
A plurality of the signal terminals are held on each of the four side walls.
An assembly of an electric connector for a circuit board, characterized in that the shape of the signal terminal held on the pair of side walls and the shape of the signal terminal held on the other pair of side walls are different.

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