JP5408815B2 - Electrical connector - Google Patents

Description

  The present invention relates to an electrical connector.

  As an electrical connector in which a plurality of terminals are arranged and held in a housing by integral molding, for example, an electrical connector disclosed in Patent Document 1 is known. In the connector of Patent Document 1, a housing is connected to a peripheral wall composed of a pair of side walls extending in the longitudinal direction and an end wall extending in a short direction perpendicular to the longitudinal direction, and a lower end edge of the peripheral wall. And a projecting wall portion extending in the longitudinal direction and projecting upward from the bottom wall and surrounded by the peripheral wall. The space opened upward between the peripheral wall and the protruding wall portion functions as a receiving recess for receiving the fitting portion of the mating connector.

  The terminal of the connector of Patent Document 1 is held by the housing on the side wall side, and an elastic arm portion on the free end side extends along the protruding wall portion. The terminal extends upward from the horizontal base along the bottom wall of the housing in the short direction of the housing and from the horizontal base at a position close to the protruding wall in the short direction via a bent transition portion. An elastic arm portion provided with a contact portion on the upper end side, a lower extension portion extending obliquely downward from the horizontal base at a position near the side wall in the short side direction, and being held by the housing, and a housing extending from the lower extension portion And a connecting portion extending horizontally to the outside.

  The protruding wall portion of the housing has a terminal groove for accommodating the transition portion and the elastic arm portion of the terminal extending in the vertical direction on the side surface of the protruding wall portion at a position corresponding to the terminal in the longitudinal direction. Open and formed. Further, the protruding wall portion is formed with a strip wall portion extending in the vertical direction between adjacent terminal grooves and at both ends in the longitudinal direction. Furthermore, the bottom wall of the housing is formed with a hole penetrating in the vertical direction at a position near the protruding wall in the short direction at the terminal position in the longitudinal direction, and the terminal groove passes through the hole. Communicate with the outside.

  In the terminal, the horizontal base is positioned along the upper surface of the bottom wall, in other words, located on the upper surface of the bottom wall and extends in the short direction, and the lateral base portion and the lower extension of the horizontal base. Is held at the boundary between the side wall and the bottom wall of the housing by integral molding with the housing. Further, the terminal is accommodated in the housing groove so that the transition portion and the elastic arm portion are separated from the groove bottom of the terminal groove in the short direction in the housing direction. Elastic displacement due to the bending of the elastic arm portion toward the groove bottom is possible. Further, although the transition portion and the elastic arm portion are located apart from the surface of the strip wall portion forming the inner wall surface of the terminal groove in the longitudinal direction, a part of the terminal groove is the transition portion and As a result of being occupied by the elastic arm portion, the space formed between the transition portion and the elastic arm portion and the surface of the strip wall portion becomes a narrow gap.

  In Patent Document 1, the hole is formed in the bottom wall of the housing below the protruding portion of the horizontal base portion of the terminal and the transition portion, and the portion near the protruding wall portion and the transition portion are bent by the deflection of the horizontal base portion. The part can be elastically displaced downward. Therefore, the elastic displacement of the elastic arm portion extending from the transition portion includes the above-described displacement toward the groove bottom and downward displacement, whereas the transition portion is only downward displacement.

  Moreover, in the electrical connector of patent document 1, the contact part of the said elastic arm part is pressed by the other party terminal provided in the other party connector in the fitting state with the other party connector, and the terminal groove | channel of the said transversal direction is carried out. It is elastically displaced toward the groove bottom and comes into contact with the mating terminal with contact pressure. When the elastic arm portion is elastically displaced in this way, an external force having a component directed to the protruding wall portion in the short direction acts on the horizontal base portion. The electrical connector does not particularly have a configuration for countering this external force.

11-000099

  As described above, the electrical connector of Patent Document 1 does not particularly have a configuration for resisting an external force having a component directed to the protruding wall portion in the short direction acting on the horizontal base portion.

  In view of such circumstances, it is an object of the present invention to provide an electrical connector that can prevent a base portion of a terminal embedded in a bottom wall of a housing from coming off from the bottom wall.

  The electrical connector according to the present invention includes a housing that holds a plurality of terminals arranged in one direction, a bottom wall that faces the mounting target surface and extends in the longitudinal direction, and extends in the longitudinal direction opposite to each other. And a projecting wall portion and a side wall standing upward from the bottom wall, and a space between the projecting wall portion and the side wall is formed as a receiving recess for receiving the mating portion of the mating connector, The plurality of terminals are electrical connectors that are integrally formed on the housing, and the terminals are positioned on the side wall in a short direction perpendicular to the longitudinal direction and are held by the housing. The holding part, the elastic arm part which is located on the protruding wall part side in the short direction and has a contact part formed thereon, and the held part and the elastic arm part which are held on the bottom wall and are connected to each other. Short direction above the bottom wall The elastic arm portion extends upward from the base portion along the protruding wall portion through the bent transition portion, and is elastically displaceable in the short direction. The contact portion for contacting the mating terminal of the mating connector is formed on the upper end side of the elastic arm portion.

  In such an electrical connector, in the present invention, the terminal includes a protrusion that protrudes from both side edges extending in the short-side direction, and the base including the protrusion is embedded and held in the bottom wall. It is characterized by being.

  In the present invention, the protruding portion of the base portion may be inclined downward as it goes away from the side edge of the base portion, and the entire protruding portion may be embedded in the bottom wall.

  Moreover, in this invention, the protrusion part of a base is good also as being formed in the taper shape from which a width | variety becomes narrow as it goes to a protrusion wall part side in a transversal direction.

  According to the present invention, in the connector fitting state, the contact portion of the elastic arm portion is elastically displaced toward the protruding wall portion in the short direction and contacts the mating terminal provided on the mating connector with contact pressure. As a result, even if an external force having a component directed to the protruding wall portion acts on the base portion of the terminal, the base portion of the terminal can be prevented from coming off from the bottom wall of the housing.

It is a perspective view shown with a section in a field at right angles to a longitudinal direction of a connector concerning a first embodiment. It is sectional drawing which shows the cross section of the connector of FIG. 1 with the cross section of the other party connector. FIG. 2 is a cross-sectional view showing a part of a cross section in a plane perpendicular to the short direction of the connector of FIG. 1. It is the expanded sectional view which looked at the cross section of the protrusion wall part vicinity of the connector of FIG. 1 from upper direction. It is sectional drawing which shows the state which has arrange | positioned the metal mold | die at the time of integral molding of a terminal and a housing, (A) shows the cross section in the position of a terminal, (B) shows the cross section in the position of the control protrusion of a housing. Show. It is the expanded sectional view which looked at the section near the projection wall part of the connector concerning a second embodiment from the upper part.

  Embodiments of an electrical connector according to the present invention will be described below with reference to the accompanying drawings.

<First embodiment>
[Connector configuration]
FIG. 1 is a perspective view showing a cross section in a plane perpendicular to the longitudinal direction of the connector according to the present embodiment. FIG. 2 is a cross-sectional view showing the cross section of the connector of FIG. 1 together with the cross section of the mating connector, and shows a state before connector fitting. FIG. 3 is a cross-sectional view showing a cross section in a plane perpendicular to the short direction of the connector of FIG. 1, and shows a cross section at the position of the base of the terminal. FIG. 4 is an enlarged cross-sectional view of a cross section near the protruding wall portion of the connector of FIG.

  A connector 1 according to the present embodiment is a connector that is mounted on a circuit board (not shown), and a mating connector 2 to be described later is fitted and connected from above, and is a synthetic resin housing 10 having a substantially rectangular parallelepiped outer shape. And a plurality of metal terminals 20 arranged and held in the housing 10 in the longitudinal direction of the housing 10.

  As shown in FIG. 1, the housing 10 faces a surface of a circuit board, which is a surface to be attached, and has a bottom wall 11 extending in the terminal arrangement direction as a longitudinal direction, and extending in the longitudinal direction and the bottom wall 11. A projecting wall portion 12 that protrudes upward from the bottom wall 11, and a peripheral wall that stands up from the bottom wall 11 and surrounds the projecting wall portion 12. The peripheral wall includes two side walls 13 that extend in the longitudinal direction so as to face each other, and two end walls 14 that connect ends of the two side walls and extend in a short direction perpendicular to the longitudinal direction. Have. A square annular space opened upward between the peripheral wall and the projecting wall portion 12 is formed as a receiving recess 15 for receiving the fitting portion of the mating connector 2.

  The protruding wall portion 12 extends in the longitudinal direction and the vertical direction, and has a plurality of strip wall portions 12C formed on the side surface facing the inner wall surface of the side wall 13 at regular intervals in the longitudinal direction and extending in the vertical direction. Is formed. Between adjacent strip wall portions, a displacement allowing recess 12A is formed which is allowed to be allowed to be elastically displaced by an elastic arm portion 22 of a terminal 20 to be described later by sunk from the position of the side surface of the strip wall portion 12C. . As shown in FIGS. 1 and 2, the displacement-permissible recesses 12 </ b> A are formed on both side surfaces of the projecting wall portion 12, respectively. Are separated in a short direction (left and right direction in FIGS. 1 and 2) by a partition wall portion 12B extending downward from the upper end, and each has a groove portion extending in the up and down direction. One slit-shaped space is formed in communication with each other.

  As shown in FIGS. 3 and 4, the inner width dimension (L1 in FIG. 4) in the longitudinal direction of the displacement allowable recess 12A is the width dimension (L2 in FIG. 4) of the elastic arm portion 22 of the terminal 20. The elastic arm portion 22 is formed to be larger, and the elastic arm portion 22 is allowed to be elastically displaced without difficulty in the short direction toward the displacement allowable recess portion 12A.

  As shown in FIGS. 1, 3 and 4, the opposing surfaces of the adjacent strip wall portions 12 </ b> C form a surface perpendicular to the longitudinal direction and are parallel to each other. The side surfaces of the partition wall 12B partitioning the displacement-allowing recesses 12A form the inner wall surface of the groove that is the upper part of the displacement-allowing recess 12A.

  The protruding wall portion 12 has a restriction protruding portion 12D protruding from the side surface of each strip wall portion 12C extending in the longitudinal direction and the vertical direction. As seen in FIGS. 3 and 4, the regulation protrusion 12D has a width dimension in the longitudinal direction (L3 in FIG. 4) smaller than the width dimension of the strip wall section 12C (L4 in FIG. 4). Is formed. In the connector fitting process and in the connector fitting state, the restricting protrusion 12D has a protruding top portion in the short direction of the housing 10 in contact with the fitting portion of the mating connector 2 in the short direction. The position of the mating connector 2 is regulated. As a result, it is possible to prevent so-called “sagging” in which the elastic arm portion 22 of the terminal 20 is damaged by being excessively pressed and displaced by the mating terminal 40.

  Moreover, in this embodiment, since the control protrusion 12D is located between the elastic arm portions 22 of the adjacent terminals 20, when the mating connector 2 is inserted or removed, the mating connector 2 is careless in the longitudinal direction. Even if it is a case where it is twisted, it can prevent that the elastic arm parts 22 of the adjacent terminal 20 deform | transform in the same direction, and contact. As shown in FIGS. 1 to 3, the upper end position of the restricting projection 12 </ b> D is located above the upper end of the elastic arm portion 22. Therefore, if the mating connector 2 starts to be mated at a position shifted from the normal position in the short direction in the connector mating process, the mating connector 2 is first connected to the restriction protrusion 12D. It abuts on the upper end. Therefore, it is possible to prevent damage such as buckling of the elastic arm portion 22 caused by the mating connector 2 coming into contact with the upper end of the elastic arm portion 22 in the connector fitting process.

  As shown in FIGS. 1 and 2, the bottom wall 11 is formed at the terminal position in the longitudinal direction after the injected resin is solidified when the housing 10 and the terminal 20 are integrally molded as will be described later. A hole 11 </ b> A that allows the lower mold P <b> 1 (see FIGS. 5A and 5B) to be extracted downward is formed so as to penetrate in the vertical direction. The hole portion 11A is formed in a range including the protruding wall portion 12 at the center position in the short direction of the housing 10, and the displacement allowable recess portion 12A communicates with the hole portion 11A. In the present embodiment, the hole portion 11A is formed in a range including the projecting wall portion 12. However, if the hole portion 11A is formed at a position corresponding to at least the displacement allowable recess portion 12A in the short side direction. Good.

  As seen in FIGS. 1 and 2, the side wall 13 extends in the longitudinal direction along the longitudinal direction and the vertical direction along the outer side surface of the main side wall 13A. It has an extended convex sub-side wall 13B. The main side wall 13A holds an inverted U-shaped held portion 21 of the terminal 20 described later over the entire area of the inverted U-shaped portion. The sub-side wall 13 </ b> B holds the outer surface of the outer leg portion 21 </ b> B positioned outside the two legs of the inverted U-shaped portion of the held portion 21.

  The terminal 20 is formed by bending a metal plate strip into a substantially horizontal S shape in the thickness direction, and is held in the housing 10 in a state of being symmetrical with respect to the protruding wall portion 12 and arranged in two rows. Has been. The terminal 20 has an inverted U-shaped held portion 21 held on the side wall 13 of the housing 10 and an elastic member having a free end extending in the vertical direction near the protruding wall portion 12 in the short direction of the housing 10. An arm portion 22, a base portion 23 that is held by the bottom wall 11 of the housing 10 and extends in the short direction and connects one leg portion (an inner leg portion 21 </ b> A described later) of the held portion 21 and the elastic arm portion 22. And a connecting portion 24 that extends from the other leg portion (an outer leg portion 21B described later) of the held portion 21 to the outside of the housing 10 and is solder-connected to a corresponding circuit on a circuit board (not shown). As often seen in FIGS. 1 and 2, the terminal 20 is held by the held portion 21 and the base portion 23 by integral molding with the housing 10.

  In the present embodiment, the terminal is held by the side wall and the bottom wall of the housing, but the form of holding the terminal is not limited to this. For example, in a connector in which the housing does not have a side wall, the terminal may be held only by the bottom wall.

  The elastic arm portion 22 extends upward along the protruding wall portion 12 via the bent transition portion 25, and can be elastically displaced in the short direction by bending in the plate thickness direction. ing. The elastic arm portion 22 is formed as a contact portion 22 </ b> A for contacting the mating terminal 40 of the mating connector 2, which will be described later, with the upper end portion on the free end side being convexly curved toward the side wall 13. As shown in FIG. 2, when the elastic arm portion 22 is in a free state, the elastic arm portion 22 and the transition portion 25 are located outside the displacement allowable recess 12 </ b> A of the housing 10. Further, the curved top portion of the contact portion 22 </ b> A protrudes further than the protruding top portion of the restricting protrusion 12 </ b> D of the housing 10.

  As is often seen in FIG. 2, the held portion 21 has an inverted U shape as described above, and one leg portion 21 </ b> A (hereinafter referred to as “inner leg portion 21 </ b> A”) extends along the inner surface of the main side wall 13 </ b> A. And the other leg 21B (hereinafter referred to as “outer leg 21B”) extending along the outer surface of the main side wall 13A. The inner leg portion 21A is formed with a lock portion 21A-1 that protrudes into the receiving recess 15 so as to face the contact portion 22A at a position near its upper end. As seen in FIG. 1, the lock portion 21A-1 is formed by, for example, embossing or the like, and the width dimension thereof is smaller than the width dimension of the inner leg portion 21A. The locking portion 21A-1 is engaged with the locked portion 41B-1 of the mating terminal 40 of the mating connector 2 described later, thereby maintaining the connector fitting state and engaging with the locked portion 41B-1. It also plays a role of assisting the contact portion 22A by contacting and electrically conducting when stopped.

  As often seen in FIGS. 1 and 2, the held portion 21 is held on the main side wall 13A by integral molding so as to straddle the main side wall 13A from above. The held portion 21 is such that the inner plate surface and side edges of the inverted U-shaped portion are held in contact with the main side wall 13A, and the outer plate surface of the inverted U-shaped portion exposed from the main side wall 13A is It is located so as to form the same surface as the outer surface of the main side wall 13A. The held portion 21 is held with the outer side surface of the outer leg portion 21B (surface facing away from the protruding wall portion 12) being embedded between the main side wall 13A and the sub-side wall 13B.

  As shown in FIG. 1, the base portion 23 is formed with a tapered portion 23 </ b> A that protrudes from both side edges of the housing 10 in the short direction of the housing 10 and decreases in width toward the projecting wall portion 12. The base portion 23 is embedded and held in the bottom wall 11 of the housing 10, and the upper surface of the base portion 23 and the upper surface of the bottom wall 11 are located at the same height, and the upper surface of the base portion 23 is in the receiving recess 15. Exposed. As shown in FIGS. 1 and 2, the connection portion 24 is located at substantially the same height as the lower surface of the bottom wall 11 and can be soldered to the corresponding circuit portion of the circuit board.

  As can be seen from FIG. 4, as described above, the internal dimension L1 of the displacement allowable recess 12A in the longitudinal direction of the housing 10 (left and right direction in FIG. 4) is the width dimension L2 of the elastic arm portion 22 of the terminal 20. Is bigger than. Moreover, since the regulation protrusion 12D is formed so that the width dimension L3 in the longitudinal direction is smaller than the width dimension L4 of the strip wall part 12C, the internal distance between the regulation projections 12D adjacent to each other in the longitudinal direction. L5 is larger than the inner dimension L1 of the displacement allowable recess 12A. Therefore, the distance L6 between the elastic arm portion 22 and the restricting protrusion 12D in the longitudinal direction is larger than the distance L7 between the elastic arm portion 22 and the inner wall surface of the displacement-permissible recess 12A in the longitudinal direction. Yes.

[Manufacturing process of connector]
The connector 1 is manufactured as follows. FIG. 5 is a cross-sectional view showing a state in which the mold is arranged in the integral molding process of the terminal 20 and the housing 10, and FIG. The cross section in the position of 12D of control protrusions is shown. First, as seen in FIGS. 5A and 5B, the terminal 20 is placed at a predetermined position on the lower mold P1 in the short direction of the housing 10 (the left-right direction in FIGS. 5A and 5B). ) Are arranged symmetrically, and the upper mold P2 from above, the lateral mold P3 from the side (right and left in FIGS. 5A and 5B), and the lower mold P1. And it arrange | positions so that the said terminal 20 may be enclosed. Then, after filling and filling a liquid resin into the space between the molds from the injection port (not shown), the housing 10 is formed by solidifying the resin. As a result, the housing 10 and the terminal 20 are integrally molded, and the connector 1 is completed. After completion of the connector 1, the lower mold P <b> 1 is extracted downward through the hole 11 </ b> A of the bottom wall 11 of the housing 10. Further, the upper mold P2 is removed upward and the horizontal mold P3 is removed laterally.

  The lower mold P1 and the upper mold P2 are mainly used for molding the bottom wall 11, the projecting wall portion 12 and the main side wall 13A of the housing 10, and the horizontal mold P3 is mainly used for the sub-side wall. Used to form 13B. As shown in FIG. 5 (A), the lower mold P1 is located above the base portion P1A in the center portion of the plate-like base portion P1A in the short direction (left-right direction in FIG. 5 (A)). It has the protrusion part P1B which protrudes to. The projecting portion P1B is a portion for forming a space of the projecting wall portion 12 including the displacement permissible recess portion 12A, and its width dimension (a dimension in a direction perpendicular to the paper surface of FIG. 5A) is the above-described displacement permissible size. This is the same as the width of the recess 12A. A concave portion P1C is formed in the upper portion of the protruding portion P1B so as to sunk corresponding to the partition wall portion 12B of the protruding wall portion 12.

  As shown in FIGS. 5A and 5B, the upper mold P2 has a frame-shaped portion corresponding to the receiving recess 15, and two walls extending in the longitudinal direction of the frame-shaped portion. A recess P2B corresponding to the protruding wall portion 12 is formed between the portions P2A. 5A, at the position corresponding to the terminal 20 in the longitudinal direction of the housing 10, the wall portion P2A has the inner side surfaces of the elastic arm portion 22 and the transition portion 25 of the terminal 20. The inner groove portion P2C is formed so as to be sunk corresponding to the inner surface, and the outer surface is provided with an outer groove portion P2D formed so as to be sunk corresponding to the inner leg portion 21A of the held portion 21. The inner groove portion P2C is open on the protruding wall portion 12 side, and surrounds the elastic arm portion 22 from three sides during integral molding. The outer groove P2D is open to the opposite side of the protruding wall 12 and surrounds the inner leg 21A of the held portion 21 from three sides during integral molding.

  As seen in FIG. 5A, the horizontal mold P3 is sunk on the side surface corresponding to the held portion 21 of the terminal 20 at a position corresponding to the terminal 20 in the longitudinal direction. In the range of the side wall 13 in the longitudinal direction, there is a recess P3A formed to be further submerged corresponding to the sub-side wall 13B.

  As shown in FIG. 2, the connector 1 according to the present embodiment has the elastic arm portion 22 and the transition portion 25 of the terminal 20 located outside the displacement-permissible recess 12A. It can be provided for the lower mold P1. Accordingly, since the displacement allowing recess 12A can be formed by arranging the protrusion P1B of the lower mold P1 formed with the width direction dimension (L1 in FIG. 4) of the entire width direction from below, the lower mold can be formed. P1 can be made in a simple shape with sufficient size (width dimension) and strength.

  In the connector 1 according to the present embodiment, the elastic arm portion 22 and the transition portion 25 of the terminal 20 are outside the displacement allowable recess portion 12A, but only the transition portion 25 is positioned outside the displacement allowable recess portion 12A, and the elastic arm portion 22 is free. Even in the case where the connector is located in the displacement allowable recess, the connector can be manufactured using the molds P1 to P3. As described above, even when the elastic arm portion 22 is positioned in the displacement-permissible recess 12A in the free state, the lower mold P1 brought from below at the time of integral molding causes the elastic arm portion 22 to be displaced. Since it is elastically displaced so as to push it out to a position outside 12A, the placement of the lower mold P1 is not hindered by the elastic arm portion 22. That is, regardless of the position of the elastic arm portion 22, the transition portion 25 only needs to be located outside the displacement allowable recess 12 </ b> A.

  In the present embodiment, the elastic arm 22 is positioned outside the displacement-permissible recess 12A, that is, in the receiving recess 15 at the time of integral molding, so that the upper mold P2 is restricted by the displacement-permissible recess 12A. Instead, the inner groove portion P2C corresponding to the elastic arm portion 22 can be formed as a groove portion that opens to the protruding wall portion 12 side and surrounds the elastic arm portion 22 from three sides, that is, a groove portion in which one is opened. Therefore, the upper mold P2 can be made in a simple shape.

  In this embodiment, since the elastic arm portion 22 of the terminal 20 is outside the displacement allowable recess 12A, the inner wall surface of the displacement allowable recess does not exist around the elastic arm portion 22 as in the prior art. It is widely open. Therefore, the peripheral portion of the inner groove portion P2C of the upper mold P2 is the dimension of the gap between the inner wall surface of the conventional displacement allowable recess 12A and the elastic arm portion in the longitudinal direction of the housing 10 (L7 in FIG. 4). Therefore, the upper mold P2 can be made with a simple shape having strength.

  Further, in the present embodiment, it is not necessary to form a portion corresponding to the gap in the upper mold P2 as in the prior art. Therefore, in order to maintain the strength of the portion, the width dimension in the longitudinal direction is increased. Accordingly, the width dimension in the same direction of the strip wall portion 12C of the housing 10 need not be reduced. As a result, the strength of the strip wall portion 12C is also maintained. Further, since the strength can be secured without increasing the longitudinal dimension of the mold and the housing 10, it is possible to avoid the connector 1 from becoming large.

[Configuration of mating connector]
The mating connector 2 shown in FIG. 2 is a connector that is attached to another circuit board (not shown), and has a frame-like fitting portion that fits into the receiving recess 15 of the connector 1. When the joint portion is inserted into the receiving recess 15, the connectors are fitted and connected. As shown in FIG. 2, the mating connector 2 is made of a synthetic resin housing 30 having a substantially rectangular parallelepiped outer shape, and a plurality of metal members arranged and held in the housing 30 by integral molding in the longitudinal direction of the housing 30. Terminal 40 (hereinafter referred to as “mating terminal 40”).

  The housing 30 has a bottom wall 31 facing the other circuit board and a peripheral wall rising from the bottom wall 31, and a space surrounded by the bottom wall 31 and the peripheral wall and opening downward in FIG. The receiving recess 35 is configured to receive the protruding wall portion 12 of the housing 10 of the connector 1 in the connector fitting state. The peripheral wall has two side walls 33 that face each other and extend in the longitudinal direction, and the side walls 33 hold the mating terminals 40 in an array.

  The mating terminal 40 is made by bending a metal plate strip in the plate thickness direction, is symmetric in the short direction of the housing 30 (left and right direction in FIG. 2), and is arranged in two rows in the housing. 30. The U-shaped fitting portion 41 held by the side wall 33 and one leg 41A (hereinafter referred to as “inner leg 41A”) located on the receiving recess 35 side of the two legs of the fitting portion 41. And a connecting portion 44 that extends in the short direction through the bent transition portion 45 and is solder-connected to the corresponding circuit portion of the other circuit board. As is often seen in FIG. 2, the mating terminal 40 is held at the fitting portion 41 and the transition portion 45 by integral molding with the housing 30.

  The fitting portion 41 is buried in the side wall 33 so as to straddle the side wall 33 from below. In the fitting portion 41, the inner plate surface and side edges of the U-shaped portion are held by the side wall 33, and the outer plate surface of the U-shaped portion exposed from the side wall 33 is the same as the outer surface of the side wall 33. It is located so as to make a plane. The size of the fitting portion 41 in the short direction of the housing 30 (left-right direction in FIG. 2) is slightly larger than the distance between the contact portion 22 of the terminal 20 of the connector 1 and the lock portion 21A-1.

  The plate surface of the inner leg portion 41A, which is located on the receiving recess 35 side of the inner leg portion 41A of the fitting portion 41, is located at a position close to the bottom wall 31 (upper position in FIG. 2) in the connector fitting state. The corresponding contact portion 41A-1 is in contact with the contact portion 22A of the terminal 20 of the connector 1 with contact pressure. Further, the plate surface of the outer leg portion 41B, which is located away from the receiving recess 35 of the other leg portion 41B (hereinafter referred to as "outer leg portion 41B") of the fitting portion 41, is positioned closer to the bottom wall 31 (see FIG. The upper portion in FIG. 2 is submerged to form a concave portion, and the concave portion functions as a locked portion 41B-1 that engages with the lock portion 21A-1 of the terminal 20.

  As shown in FIG. 2, the connection portion 44 is located at substantially the same height as the lower surface of the bottom wall 31 (upper surface in FIG. 2), and can be soldered to the corresponding circuit portion of the circuit board. ing.

[Manufacturing process of mating connector]
The mating connector 2 is manufactured by integrally molding the housing 30 and the mating terminal 40 using another upper mold and a lower mold (not shown) different from the mold for the connector 1.

[Connector mating operation]
Hereinafter, the fitting operation between the connector 1 and the mating connector 2 will be described. First, the connector 1 and the mating connector 2 are soldered to corresponding circuit portions of the corresponding circuit boards. Next, as shown in FIG. 2, the connector 1 is brought into a posture in which the receiving recess 15 is opened upward, and the mating connector 2 is brought to a position above the connector 1 in a posture in which the receiving recess 35 is opened downward. Then, the mating connector 2 is moved downward, and the fitting portion of the mating connector 2 is inserted into the receiving recess 15 of the connector 1.

  As a result, the fitting portion 41 of the mating terminal 40 of the mating connector 2 enters between the contact portion 22A and the lock portion 21A-1 of the terminal 20 of the connector 1 while expanding. When the contact portion 22A is pressed toward the displacement allowable recess 12A, the elastic arm portion 22 is elastically displaced so as to enter the displacement allowable recess 12A. Further, when the insertion portion 41 advances, the contact portion 22A comes into contact with the corresponding contact portion 41A-1 of the insertion portion 41 with contact pressure, and the lock portion 21A-1 is locked to the locked portion of the insertion portion 41. Locks with 41B-1 in the vertical direction. As a result, the terminals of the connectors are electrically connected and locked to each other, and the fitting connection between the connectors is completed.

  When the elastic arm portion 22 of the terminal 20 of the connector 1 is elastically displaced toward the protruding wall portion 12 by the displacement allowable recess 12A in the connector fitting state, it has a component toward the protruding wall portion 12 in the short direction of the housing 10. An external force acts on the base 23 of the terminal 20. As a result, since the taper portion 23A of the base portion 23 bites into the corresponding portion of the bottom wall 11 holding the taper portion 23A in the direction toward the protruding wall portion 12, the base portion 23 comes off from the bottom wall 11. Can be prevented.

  In the present embodiment, the upper surface of the tapered portion is located at the same height as the upper surface of the bottom wall, and is exposed in the receiving recess. Instead, the upper surface of the tapered portion is exposed. Without making it, the whole taper part may be embed | buried in the bottom wall. For example, the whole taper part can be embedded as a shape which inclines below as it goes to the protrusion direction, ie, the direction which leaves | separates from the side edge of a base. Thus, by embedding the entire tapered portion in the bottom wall, the upward movement of the tapered portion is prevented by the corresponding portion of the bottom wall. As a result, the removal of the base from the bottom wall is more reliably prevented, so that the effect of preventing the terminal from being pulled out is improved.

<Second embodiment>
In the present embodiment, the opposing surfaces of the displacement allowing recesses of the protruding wall portion are not parallel to each other, but are tapered surfaces that expand toward the receiving recess side, i.e., the opening side of the displacement allowing recess. This is different from the first embodiment in which the opposing surfaces are parallel to each other. In this embodiment, it demonstrates centering on a different part from 1st embodiment, attaches | subjects the same code | symbol about the part same as 1st embodiment, and abbreviate | omits description.

  FIG. 6 is an enlarged cross-sectional view of a cross section in the vicinity of the protruding wall portion 12 of the connector according to the present embodiment as viewed from above. As seen in FIG. 6, in the present embodiment, the opposing surface of each displacement allowing recess 12 </ b> A is a tapered surface that expands toward the receiving recess 15 (see FIGS. 1 and 2). By forming the opposing surface as a tapered surface in this way, compared to the case of the first embodiment in which the opposing surface is parallel, in the connector manufacturing process, after the housing 10 and the terminal 20 are integrally formed, the displacement The lower mold can be easily extracted from the allowable recess 12A. In addition, the width dimension of the opposing surfaces is not uniform over the short direction (vertical direction in FIG. 6) of the projecting wall portion 12, and compared to the case where the opposing surfaces are parallel to each other, Since some error is allowed in the width dimension of the portion corresponding to the displacement allowable recess 12A, the lower mold can be easily manufactured.

<Modification>
In the first and second embodiments, the restriction protrusions are provided on all the wall portions of the protrusion wall part. However, when the restriction protrusions have sufficient strength, they are not necessarily all. It does not need to be provided in the strip wall portion, and may be formed in each of any two or more strip wall portions among the plurality of strip wall portions. Thus, the position of the mating connector can be well regulated by forming the regulation protrusions on two or more wall portions.

  It is also possible to form the restricting projections only on the strip wall portions located at both ends in the longitudinal direction of the projecting wall portions without forming the restricting projection portions on the strip wall portions positioned between the adjacent displacement allowable recesses. is there. As a result, the strip wall portion on which the restricting projection is not formed can be reduced in size in the longitudinal direction accordingly, so that the housing and thus the connector in the longitudinal direction can be miniaturized.

DESCRIPTION OF SYMBOLS 1 Connector 12D Control protrusion 2 Mating connector 20 Terminal 10 Housing 21 Held part 11 Bottom wall 22 Elastic arm part 11A Hole part 22A Contact part 12 Projection wall part 23 Base part 12A Displacement allowable recessed part 23A Tapered part 12C Strip wall part 25 Transition part

Claims (3)

A housing that holds a plurality of terminals arranged in one direction is a bottom wall that faces the mounting target surface and extends in the longitudinal direction facing the mounting direction of the terminals, and extends in the longitudinal direction so as to face each other and upward from the bottom wall And a space between the protruding wall portion and the side wall is formed as a receiving recess for receiving the fitting portion of the mating connector, and the plurality of terminals are connected to the housing. An electrical connector held by integral molding,
The terminal is positioned on the side wall in the short direction perpendicular to the longitudinal direction and is held by the housing, and the contact is formed on the protruding wall in the short direction. An elastic arm portion, and a base portion that is held by the bottom wall and extends in the short direction along the bottom wall so as to connect the held portion and the elastic arm portion. However, it extends upward along the protruding wall portion from the base portion through the bent transition portion and is elastically displaceable in the short direction, and is connected to the mating connector on the upper end side of the elastic arm portion. In the electrical connector in which the contact portion for making contact with the mating terminal is formed,
The terminal is characterized in that protrusions protruding from both side edges extending in the lateral direction are formed in the base, and the base including the protrusions is embedded and held in the bottom wall. connector.   The electrical connector according to claim 1, wherein the protruding portion of the base portion is inclined downward as it goes away from the side edge of the base portion, and the entire protruding portion is embedded in the bottom wall.   The electrical connector according to claim 1, wherein the protruding portion of the base portion is formed in a tapered shape having a width that decreases in a short direction toward the protruding wall portion side.

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