JP5377739B2 - Flat conductor electrical connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric connector for a flat conductor capable of suppressing positional error at a cam part as much as possible, which contains two kinds of terminals different in assembling direction in a housing. <P>SOLUTION: An electric connector for a flat conductor, in which an abutment portion 28A of a first terminal 20 is positioned in the direction upper than an abutment portion 38A of a second terminal 30, includes upper cam edges 55B and 56B and lower cam edges 55A and 56A, in which a first cam part 55 and a second cam part 56 of a movable member 3 rotate around a common axis line to abut with an upper arm part and a lower arm part of the first terminal and the second terminal. The lower cam edges 55A and 56A of the first cam part 55 and the second cam part 56 are so formed as to be constant in difference between cam radius lengths at an arbitrary same angle position within a sliding range in which the lower arm part is brought into slide contact when the movable member 3 rotates to a closed position. <P>COPYRIGHT: (C)2013,JPO&amp;INPIT

Description

  The present invention relates to an electrical connector for a flat conductor.

  Patent Document 1 discloses a connector having a horizontal H shape in which a terminal has an upper arm portion and a lower arm portion extending in the front-rear direction and both are connected by a connecting portion. In this Patent Document 1, there are two types of terminals, both of which have a horizontal H shape, and one type of terminal is assembled from the front to the housing, and the other type of terminal is assembled from the rear to the housing. Because of this difference in the direction of assembly, the details are different, including the connection part for connection to the circuit board, but both types of terminals are basically the same in that they have a horizontal H shape. It is. The FPC, which is the connection object, is inserted between the upper arm and the lower arm on the rear side of both types of terminals in the state of being incorporated into the housing, and the upper arm and the lower arm on the front side of both types of terminals. By operating a movable member (operating member) having a cam portion positioned corresponding to each terminal between the portions, the cam portion raises the front portion of the upper arm portion of both types of terminals, The upper arm portion elastically displaces the rear portion of the upper arm portion downward with the position of the connecting portion as a fulcrum. The rear portion of the terminal presses the flat conductor downward due to its elastic deformation, and the connection with the rear portion of the lower arm portion of the terminal is ensured.

  In such Patent Document 1, the cam portion of the movable member obtains a reaction force from below during the operation of the movable member, and the upper edge of the cam portion is changed to either of the two types of terminals by this reaction force. In contrast, the terminal directly contacts the front of the upper arm of the terminal and lifts it upward. On the other hand, the lower edge of the cam directly presses the lower arm of the terminal against a kind of terminal to obtain an upward reaction force. A reaction force is obtained by pressing the housing that holds the lower arm of the terminal.

Japanese Patent No. 4279823

  In Patent Document 1, the cam portion of the movable member is in contact with only this terminal while the cam portion positioned corresponding to the one type of terminal is the upper edge of the cam portion positioned corresponding to the other type of terminal. At the terminal and at the lower edge against the housing. Therefore, the cam portion positioned corresponding to the other type of terminal is supported in the vertical direction by two different members and the position is determined. In general, components are associated with manufacturing and assembly errors. Therefore, there is a possibility that the cam portion has a position error in which the error regarding the two members is weighted. This increases the error in the amount of lifting of the front portion of the upper arm portion of the terminal, and as a result, increases the error of the elastic displacement amount in the rear portion of the upper arm portion. This error in the amount of elastic displacement leads to a difference in contact pressure between the flat conductor and the terminal between one type of terminal and another type of terminal. This reduces the reliability of the connection state between the terminal and the flat conductor.

  In view of such circumstances, the present invention has two types of terminals with different mounting directions in the housing, but the cam portion of the movable member abuts only the terminals with respect to both types of terminals, so that the cam portion It is an object of the present invention to provide an electrical connector for a flat conductor that can suppress the position error of the flat conductor as much as possible.

An electrical connector for a flat conductor according to the present invention is made by maintaining a flat plate surface of a metal plate, and an upper arm portion and a lower arm portion extending in the front-rear direction are connected by a connecting portion at a middle portion in the front-rear direction. A plurality of terminals, a terminal groove for arranging and holding the terminals in a direction perpendicular to a plate surface of the terminals, and a housing formed with a receiving opening for a flat conductor that opens backward, and the receiving A movable member movable between an open position that allows insertion of the flat conductor into the opening and a closed position that presses the inserted flat conductor with the upper arm, and a plurality of terminals have the terminal grooves On the other hand, the flat conductor has the above-mentioned receiving opening portion with the first terminal attached from the front side and the second terminal attached from the rear side, and the movable member in the open position. The cam formed on the movable member when the movable member is moved to the closed position. There presses the flat conductive downwardly by the rear elastic displacing downward of the upper arm portion lift the front portion of each of the upper arm of the first terminal and a second terminal upward.

  In such an electrical connector for a flat conductor, in the present invention, the lower arm portion of the first terminal is in contact with the cam portion formed in the front portion of the connecting portion so that the second terminal The cam portion of the movable member is located above the contact portion, and has a first cam portion and a second cam portion at positions corresponding to the first terminal and the second terminal in the terminal arrangement direction, The first cam portion and the second cam portion have an upper cam edge and a lower cam edge that rotate around a common axis and contact the front portions of the upper and lower arm portions of the first and second terminals, respectively. The lower cam edge of each of the first cam portion and the second cam portion is at the same angular position in the sliding contact range in which the movable member is in sliding contact with the lower arm when the movable member rotates from the open position to the closed position. Is characterized in that the difference between the cam radius lengths is constant.

  In the connector according to the present invention having such a configuration, the first terminal is mounted on the housing from the front and the second terminal is mounted on the corresponding terminal groove from the rear.

  The movable member has a first cam portion and a second cam portion corresponding to the first terminal and the second terminal, respectively, and both the cam portions rotate around a common axis. Therefore, the distance from the axis line of the first cam portion and the second cam portion to the contact portion of each of the first terminal and the second terminal is larger at the second terminal than at the first terminal. In the present invention, because of the difference in distance, the first cam portion and the second cam portion have a difference in cam radius at their lower cam edges. The lower cam edge also comes into direct contact with the terminal. Therefore, regarding the position of the cam portion, manufacturing and assembly errors between the movable member and the housing can be reduced, and the contact pressure between the flat conductor and the terminal does not vary between the two types of terminals, and the contact is stabilized.

  In addition to this, in the present invention, it becomes possible to position the cam axis upward in the above-described situation, and the movable member is in the open position even if the length of the operation portion of the movable member is reduced. In this state, the amount of upward protrusion of the operating portion to the outside of the housing is secured to a size that improves the operability of the movable member, while the connector in the front-rear direction of the connector in the closed position The amount of protrusion does not increase, and the closed position, that is, the size of the connector in use can be reduced.

  In the present invention, the movable member can be configured such that each lower cam edge of the first cam portion and the second cam portion is formed by an arc. In this case, the lower cam edge of the first cam portion and the second cam portion is formed as a part of a concentric circle having a cam radius difference. In the present invention, the first cam portion and the second cam portion can be formed by a curve other than the arc as long as the cam radius is provided.

  In the present invention, the lower arm portion of the terminal has a concave curved portion along the lower cam edge in the sliding contact range of the first cam portion at the first terminal, and a straight portion extending in the front-rear direction at the second terminal. Can be like that. The concavely bent portion and the straight portion thus formed support the lower cam edges of the corresponding first cam portion and second cam portion, respectively. Such a concavely bent portion at the first terminal prevents the cam from coming off, and the straight portion of the second terminal enables insertion from the rear of the second terminal.

  As described above, according to the present invention, the two types of terminals to be mounted on the housing from the front and from the rear allow the mounting of the contact portion that contacts the cam portion of the movable member for pressing the flat conductor. In addition, since it is decided to make a difference in height, it becomes possible to support the cam part only with the terminal, and as a result, manufacturing errors and assembly errors can be kept to a minimum. As a result, there was no variation in the pressing force, and the connection reliability between the terminal and the flat conductor was increased. In addition, according to the present invention, the axis of the cam can be positioned upward. Even when the length of the operation portion of the movable member is reduced, the operation portion is kept in the open position even when the movable member is in the open position. The amount of protrusion of the connector to the outside of the housing is ensured to be large enough to improve the operability of the movable member, but the amount of protrusion of the connector in the front-rear direction of the connector in the closed position does not increase. In this closed position, that is, in the use state of the connector, the size can be reduced.

It is a perspective view showing the appearance about the whole connector as one embodiment of the present invention. 1 is a cross-sectional view of the connector in the open position with respect to the connector, where (A) is a first terminal, (B) is a second terminal, and (C) is a view at the position of a metal fitting. FIG. 1 is a cross-sectional view of the connector with the movable member in the closed position, where (A) is the first terminal, (B) is the second terminal, and (C) is the position of the metal fitting.

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

  In FIG. 1, reference numeral 1 denotes a connector according to the present embodiment, and F denotes a flat conductor connected to the connector 1.

  The flat conductor F has a connection portion with the connector 1 at its front end (upper right edge in the figure) and extends rearward, but the portion up to the position immediately behind the connection portion is shown in the figure. Further, the illustration is omitted behind it. In the present embodiment, the flat conductor F has a connection portion formed by removing the coating on the upper surface of the front end portion and exposing the connection circuit portion F1. This connecting portion is provided with a reinforcing sheet F2 on the lower surface in order to improve the strength when connected to the connector.

  In the connecting portion of the flat conductor F, a locked portion F3 is formed by notches on both side edges in the width direction. A claw-shaped locking portion of a metal fitting, which will be described later, enters and locks into the notched locked portion F3, thereby contributing to prevention of the flat conductor F from coming off.

The connection circuit portion F1 in the connection portion of the flat conductor F is provided with pads F4 formed on each of the plurality of wiring portions arranged in the width direction. Arranged in a shape.

  On the other hand, the connector 1 includes a connector body 2 and a movable member 3 that is movably supported by the connector body 2.

  The connector body 2 includes a housing 10 made of an electrical insulating material, two types of terminals, a first terminal 20 and a second terminal 30 made of a metal plate and held by the housing 10, and these terminals. Similarly, it is made of a metal plate and has a metal fitting 40 held by the housing 10.

  The housing 10 has a substantially rectangular parallelepiped outer shape that is long in the width direction of the flat conductor F and relatively small in height, and has two types of slit-like first terminal grooves 11 and second penetrating in the front-rear direction. Terminal grooves 12 are alternately formed in the width direction. In the two types of the first terminal groove 11 and the second terminal groove 12, the first terminal 20 and the second terminal 30 are respectively inserted and held correspondingly to form the terminal arrangement range in the width direction. doing. Outside the arrangement range of the terminals, a metal groove 13 for holding the metal fitting 40 is formed in the same slit shape as the terminal grooves 11 and 12 so as to penetrate in the front-rear direction.

  Since the first terminal 20, the second terminal 30 and the metal fitting 40 are made while maintaining a flat plate surface of the metal plate, the first terminal groove 11, the second terminal groove 12 and the metal fitting for inserting and holding them are used. The groove 13 is also formed so that the groove width in the terminal arrangement direction is substantially equal to the plate thickness of the first terminal 20, the second terminal 30 and the metal fitting 40, and in FIG. 2 (A), (B) and (C) The direction perpendicular to is the groove width.

  The first terminal groove 11, the second terminal groove 12, and the metal fitting groove 13 are formed between the upper wall 14 and the bottom wall 15 of the housing 10 as seen in FIGS. 2 (A), (B), and (C), respectively. In the front-rear direction (right and left in the figure), it penetrates. The first terminal groove 11, the second terminal groove 12, and the metal groove 13 are communicated with each other in a communication groove extending in a direction perpendicular to the paper surface of FIG. The communication groove forms a receiving opening 16 that opens rearward, and a connecting portion of the flat conductor F can be introduced into the receiving opening 16. Thus, the first terminal groove 11, the second terminal groove 12, and the metal fitting groove 13 are formed such that their rear regions are separated vertically by the receiving opening 16, and the first terminal upper groove 11A and the first terminal lower groove 11B, The second terminal upper groove 12A and the second terminal lower groove 12B, and the metal upper groove 13A and the metal lower groove 13B are provided.

  The first terminal groove 11, the second terminal groove 12, and the metal fitting groove 13 communicate with each other at their front portions. That is, the front portions of the first terminal groove 11, the second terminal groove 12, and the metal fitting groove 13 are communicated with each other through an open space 17 formed above the bottom wall 15 of the housing 10. Accordingly, the upper wall 14 is notched at the front portion, and the open space 17 enables the movable member 3 to be disposed and rotated. The upper wall 14 has a notch portion at the rear as shown in FIG. 2C at the positions of the metal fitting grooves 13 on both ends in the terminal arrangement direction. Sufficient displacement above the corresponding part is possible.

  In the first terminal groove 11, the second terminal groove 12, and the metal fitting groove 13, in the front-rear direction, the part positioned between the open space 17 at the front part and the receiving opening part 16 at the rear part is arranged in the vertical direction. Position restricting portions 18A, 18B, and 18C formed in an island shape between the upper wall 14 and the bottom wall 15 are respectively provided to connect the opposing inner surfaces of the grooves. Although the position restricting portions 18B and 18C provided in the second terminal groove 12 and the metal fitting groove 13 are in the same position in the front-rear direction, they are located in front of the position restricting portion 18A provided in the first terminal groove 11. doing.

  In the terminal arrangement direction, a first terminal 20, a second terminal 30, and a metal fitting 40, which will be described later, are fixed to portions of the bottom wall 15 corresponding to the first terminal groove 11, the second terminal groove 12, and the metal fitting groove 13. A fixing portion is formed. The fixing portion 19A in the first terminal groove 11 is formed with a taper portion at the front end of the bottom wall 15, and the fixing portions 19B and 19C in the second terminal groove 12 and the metal fitting groove 13 are tapered at the rear end portion of the bottom wall 15. Part is formed.

  The first terminal 20, the second terminal 30 and the metal fitting 40 inserted and held in the first terminal groove 11, the second terminal groove 12 and the metal fitting groove 13, respectively, maintain a flat plate surface of the metal plate. Are formed in a substantially horizontal H-shape, and each has an upper arm portion 21; 31; 41 and a lower arm portion 22; 32; 42, both of which are located at the middle portion in the front-rear direction. 23; 33; 43. The connecting portion 23 of the first terminal 20 is located in front of the corresponding position restricting portion 18A, and the connecting portions 33; 43 of the second terminal 30 and the metal fitting 40 are both from the corresponding position restricting portions 18B; 18C. Is also located behind.

  As can be seen in FIG. 2A, the first terminal 20 has the upper arm portion 21 extending to the vicinity of the front end of the housing 10 but only to the middle position at the rear. The upper arm portion 21 has a pressure receiving arm portion 24 in front of the connecting portion 23 and is located above the rear flexible arm portion 25 via an inclined portion. A pressure receiving recess 24A is formed at the lower edge of the pressure receiving arm 24, and a pressing protrusion 25A that protrudes downward is provided at the rear end of the flexible arm 25. When the pressure receiving recess 24A receives an upward force from the movable member 3 to be described later, the upper arm portion 21 is configured so that the flexible arm portion 25 is directed downward with the position of the connecting portion 23 as a fulcrum by the lever principle. It bends and tilts.

  The lower arm portion 22 of the first terminal 20 has a rear portion extending in the front-rear direction to substantially the same position as the flexible arm portion 25 of the upper arm portion 21, but a front portion is a pressure receiving arm portion 24 of the upper arm portion 21. It extends further forward and its front end projects out of the housing. The lower arm portion 22 has a front fixed arm portion 26 and a rear fixed arm portion 27 in front of and behind the position of the connecting portion 23. The front fixed arm portion 26 includes a cam support portion 28 that protrudes upward at an intermediate portion in the front-rear direction and a connection portion 29 that protrudes outward from the housing toward the front.

  The cam support portion 28 has an upper edge that extends to a position above the lower edge of the island-shaped position restricting portion 18A of the housing 10, and a cam contact portion 28A is formed by the substantially L-shaped upper edge. Yes. The cam contact portion 28A has a straight edge portion 28A-1 extending in the front-rear direction and an arc-shaped portion 28A-2 formed at a corner portion. The arcuate portion 28A-2 is slightly submerged in the vertical direction than the straight edge portion 28A-1.

  The connecting portion 29 is bent downward so as to have a lower edge located slightly below the bottom surface of the bottom wall 15 of the housing 10, and the lower edge is in contact with the corresponding circuit surface with the circuit board. Solder connection is possible. The connecting portion 29 is formed with a notched groove-like fixed portion 29A on the rear edge side thereof, and the fixed portion 29A is connected to the tapered fixing portion 19A formed on the bottom wall 15 of the housing 10 described above. It is press-fitted and plays a role in fixing the first terminal 20 to the housing 10.

  The rear fixed arm portion 27 of the lower arm portion 22 of the first terminal 20 extends rearward from the position of the connecting portion 23 and extends to a position corresponding to the pressing protrusion 25 </ b> A of the upper arm portion 21. A contact portion 27A is provided at the rear end of the rear fixed arm portion 27 so as to face the pressing protrusion 25A and protrude upward. Further, the rear fixed arm portion 27 is formed with a locking projection 27B protruding upward at a position corresponding to the position restricting portion 18A of the housing 10 in the front-rear direction.

The first terminal 20 thus formed is inserted into the first terminal groove 11 from the front to the rear. When inserted to a predetermined position, the rear fixed arm portion 27 of the lower arm portion 22 penetrates between the bottom wall 15 of the housing 10 and the island-shaped position restricting portion 18A, and is formed on the rear fixed arm portion 27. The protrusion 27B bites into the lower edge of the position restricting portion 18A, and the fixed portion 29A of the front fixed arm portion 26 is fixed by being fitted into the fixing portion 19A of the bottom wall 15 of the housing 10, so that the first One terminal 20 is prevented from coming off.

  As seen in FIG. 2B, the second terminal 30 has the upper arm portion 31 extending forward to the vicinity of the front end of the housing 10 and rearward to the rear end position. The upper arm portion 31 has a pressure receiving arm portion 34 on the front side and a flexible arm portion 35 on the rear side of the connecting portion 33. A pressure receiving recess 34A is formed at the lower edge of the pressure receiving arm 34, and a pressing protrusion 35A protruding downward is provided at the rear end of the flexible arm 35. When the pressure receiving recess 34A receives an upward force from a movable member, which will be described later, the upper arm portion 31 is bent downward with the flexible arm portion 35 as a fulcrum by the lever principle. It is designed to tilt.

  The lower arm portion 32 of the second terminal 30 has a front portion extending in the front-rear direction to substantially the same position as the pressure receiving arm portion 34 of the upper arm portion 31, but a rear portion of the lower arm portion 32 of the upper arm portion 31. The rear end extends beyond the housing and protrudes out of the housing. The lower arm portion 32 has a front fixed arm portion 36 and a rear fixed arm portion 37 before and after the position of the connecting portion 33. The front fixed arm portion 36 has a cam support portion 38 provided at the front portion thereof.

  The cam support portion 38 of the front fixed arm portion 36 has an upper edge that is located at or below the lower edge of the island-shaped position restricting portion 18B of the housing 10 and has a cam contact that forms a straight edge. Part 38A is formed.

  The front fixed arm portion 36 has a locking protrusion protruding upward in a front-rear direction between the cam contact portion 38A and the connecting portion 33 at a position corresponding to the position restricting portion 18B of the housing 10. A portion 36B is formed.

  In the second terminal 30, as described above, the connection portion 39 is provided at the rear end portion on the opposite side to the first terminal 20 in the front-rear direction.

  The connecting portion 39 provided to protrude from the housing at the rear end of the rear fixed arm portion 37 is bent downward and extends so as to have a lower edge located slightly below the bottom surface of the bottom wall 15 of the housing 10. The lower edge is in contact with the corresponding circuit surface with the circuit board to enable solder connection. The connecting portion 39 is formed with a cut groove-shaped fixed portion 39A on the front edge side thereof, and the fixed portion 39A is press-fitted into the tapered fixed portion 19B of the housing 10 described above to be connected to the second terminal. It plays a role in fixing 30 to the housing 10.

  The rear fixed arm portion 37 of the lower arm portion 32 of the second terminal 30 protrudes upward at a position corresponding to the pressing projection 35A slightly forward of the connection portion 39 so as to face the pressing projection 35A. A contact portion 37A is provided.

  The second terminal 30 formed in this way is inserted into the second terminal groove 12 from the rear to the front. When inserted to a predetermined position, the front fixed arm portion 36 of the lower arm portion 32 penetrates between the bottom wall 15 of the housing 10 and the island-shaped position restricting portion 18B, and is formed on the front fixed arm portion 36. The protrusion 36B bites into the lower edge of the position restricting portion 18B, and the fixed portion 39A of the rear fixed arm portion 37 is fixed by being fitted into the fixing portion 19B of the bottom wall 15 of the housing 10, so that the first The disconnection of the two terminals 30 is prevented.

The metal fitting 40 is formed in a shape similar to the second terminal 30 as seen in FIG. When compared with the second terminal 30, the difference is that the locking portion 45A at the rear end of the upper arm portion 41 has the same shape as the pressing protrusion 35A of the second terminal 30, but is formed larger. That is, the rear arm 42 does not have a portion corresponding to the contact portion 37A of the second terminal 30 at the rear end. Others are the same as those of the second terminal 30, so “10” is added to the reference numeral of the second terminal 30 to make the reference numeral “40”, and the description thereof is omitted.

  The locking portion 45A of the metal fitting 40 has a large hook shape and projects downward, the front edge is substantially perpendicular to the front-rear direction, and the rear edge is a slanted edge toward the lower end. The flexible arm portion 45 of the upper arm portion 41 where the locking portion 45A is formed is inclined slightly upward toward the rear, and the locking portion 45A pressed by the distal end of the flat conductor F to be inserted is provided. Further, elastic deformation is generated so as to incline upward, and further insertion of the flat conductor F to a predetermined position is made possible. The notch portion in the above-described rear portion of the upper wall 14 of the housing 10 allows this elastic deflection upward of the flexible arm portion 45.

  As described above, the movable member 3 is movably supported in the connector main body 2 in which the first terminal 20, the second terminal 30, and the metal fitting 40 are held with respect to the housing 10. Has been.

  As shown in FIG. 1, the movable member 3 is made of an electrical insulating material similar to that of the housing 10 as a member extending over almost the entire width of the housing 10.

  The movable member 3 is supported so as to be rotatable between an open position seen in FIG. 2 and a closed position seen in FIG. In FIG. 2, the rotation axis of the movable member 3 is located in the lower half portion of the movable member 3, and the lower half portion is accommodated in an open space 17 formed in the front portion of the housing 10. In FIG. 2, an upper half portion outside the open space 17 and projecting upward from the upper wall 14 of the housing 10 is an operation portion 51 for a user to rotate the movable member 3. It has become.

  In the lower half portion of the movable member 3 in FIG. 2, the first terminal 20, the position corresponding to the first terminal 20, the second terminal 30 and the metal fitting 40 in the width direction (terminal arrangement direction) of the movable member 3, A slit-like first groove portion 52, a second groove portion 53, and a third groove portion 54 that allow the front portions of the upper terminals 21; ing. Accordingly, the groove widths of the first groove portion 52, the second groove portion 53, and the third groove portion 54 (the widths of the groove inner surfaces in the direction perpendicular to the paper surface) are respectively the first terminal 20, the second terminal 30, and the metal fitting 40. The dimension is slightly larger than the plate thickness. The first groove portion 52, the second groove portion 53, and the third groove portion 54 are respectively provided with a first cam portion 55, a second cam portion 56, and a third cam portion 57 that connect the groove inner surfaces.

The first cam portion 55 provided in the first groove portion 52 corresponding to the first terminal 20 is located below the first groove portion 52 of the movable member 3 in the open position as seen in FIG. And has a horizontally long oval cross section. The rotation center X of the first cam portion 55 is located on the center of curvature of the arc portion on the right side of the elliptical cross section, and is located on the extension line of the rotation axis of the movable member 3 described above. Therefore, the cam radius is a straight line having the rotation center X as one end and the arbitrary point of the arc portion as the other end. Thus, of the left and right arc portions of the first cam portion 55, the right arc portion where the rotation center X exists forms the lower cam edge 55A, and the left arc portion forms the upper cam edge 55B. The lower cam edge 55A forms a sliding contact range in sliding contact with the cam contact portion 28A. When the first cam portion 55 rotates about the rotation center X to the closed position in FIG. 3, the upper cam edge 55B causes the pressure receiving arm portion 24 of the upper arm portion 21 of the first terminal 20 to receive the pressure receiving recess 24A. Thus, the distance from the lower cam edge 55A is sufficient to be elastically displaced by pressing upward. The lower cam edge 55A has a slight gap between it and the arcuate portion 28A-2 in which the cam contact portion 28A is recessed in the open position as seen in FIG. Accordingly, the position of the rotation center X is stabilized in the arcuate portion 28A-2.

  As shown in FIG. 2B, the second cam portion 56 provided in the second groove portion 53 corresponding to the second terminal 30 has a large circular arc lower cam edge 56A on the right side and a small circular arc upper cam edge on the left side. The rotation center X is located at a position coinciding with the first cam portion 55 and has a circular arc of the lower cam edge 56A that forms a sliding contact range in sliding contact with the cam contact portion 38A. It has a center of curvature. With respect to the rotation center X, the cam contact portion 38A of the cam support portion 38 is positioned below the straight edge portion 28A-1 of the cam contact portion 28A of the cam support portion 28 of the first terminal 20. Therefore, the cam radius of the lower cam edge 56A in contact with the cam contact portion 38A is larger than the cam radius of the first cam portion 55, and has a constant cam radius difference with respect to the first cam portion 55 at any angular position. ing. Similar to the upper cam edge 55B of the first cam portion 55, the second cam portion 56 rotates about the rotation center X to the closed position in FIG. In some cases, the pressure receiving arm portion 34 of the upper arm portion of the second terminal 30 has a sufficient distance from the lower cam edge 56A so as to be elastically displaced by being pressed upward by the pressure receiving concave portion 34A.

  The 3rd cam part 57 provided in the 3rd groove part 54 corresponding to the metal fitting 40 is made substantially the same as the above-mentioned 2nd cam part 56 located in the 2nd groove part 53, as FIG.2 (C) shows. It has a substantially fan shape with a lower circular cam edge 57A on the right side and an upper cam edge 57B on the left side of the small arc, and the rotation center X is the rotation of the first cam part 55 and the second cam part 56. The center of curvature of the arc of the lower cam edge 57A that forms a sliding contact range that is in sliding contact with the cam contact portion 48A is at a position that coincides with the center of movement. With respect to the rotation center X, the cam contact portion 48A of the cam support portion 48 is a straight edge portion 28A of the cam contact portion 28A of the cam support portion 28 of the first terminal 20 in the same manner as the second cam portion 56. Since the cam radius of the lower cam edge 57A in contact with the cam contact portion 48A is larger than the cam radius of the first cam portion 55, a constant cam radius difference is obtained at any angular position. Have. The upper cam edge 57B of the third cam portion 57 rotates in the same way as the upper cam edge 55B of the first cam portion 55 to the closed position in FIG. In some cases, the pressure receiving arm portion 44 of the upper arm portion of the metal fitting 40 has a distance from the lower cam edge 57A sufficient to be elastically displaced by being pressed upward by the pressure receiving recess 44A.

  The connector of this embodiment having such a configuration is used and functions in the following manner.

  First, the connector 1 is arranged at a predetermined position on a circuit board (not shown), and the solder fixing part 49 of the metal fitting to the connection part 29 of the first terminal and the connection part 39 of the second terminal is soldered to the corresponding part of the circuit board. Connect and fix.

  With respect to the connector 1 thus attached to the circuit board, the movable member 3 is brought into the open position as seen in FIG. 2, the receiving opening 16 of the housing 10 is opened rearward, and the flat conductor F Enable insertion.

  Next, the connecting portion of the flat conductor F is inserted forward into the receiving opening 16. The first terminal 20 is between the pressing protrusion 25A of the upper arm portion 21 and the contact portion 27A of the lower arm portion 22, and the second terminal 30 is between the pressing protrusion 35A of the upper arm portion 31 and the contact portion 37A of the lower arm portion 32. Since the intervals are slightly wider than the thickness of the connecting portion of the flat conductor F, the connecting portion of the flat conductor F can be easily inserted. However, with respect to the metal fitting 40, the gap between the locking portion 45A of the upper arm portion 41 and the lower arm portion 42 of the metal fitting 40 is narrower than the thickness of the connecting portion of the flat conductor F. At the front end of the mold conductor F, the locking portion 45A is lifted and advanced to a predetermined position, and the locking portion 45A enters the notched locked portion F3 of the flat conductor F. The conductor F is prevented from coming off.

Next, as seen in FIG. 3, the movable member 3 is rotated to the closed position. This rotation
The first cam portion 55, the second cam portion 56, and the third cam portion 57 of the movable member 3 rotate about the rotation center X, and the lower cam edges 55A; 56A; The contact portions 28A; 38A; 48A of the terminal 20, the second terminal 30 and the metal fitting 40 are slidably contacted, and the upper cam edges 55B; 56B; 57A correspond to the pressures received by the first terminal 20, the second terminal 30 and the metal fitting 40. The concave portions 24A; 34A; 44A are pressed upward. As a result, in the first terminal 20, the second terminal 30, and the metal fitting 40, the pressure receiving arm portions 24; 34; 44 of the upper arm portions 21; 31; 41 are lifted, and the flexible arm portion 25; 35; 45 bends downward, the pressing protrusions 25A; 35A press the upper surface of the flat conductor F downward, and the locking portion 45A is further displaced downward to maintain its position. Accordingly, the flat conductor F is brought into electrical contact with the contact portions 27A and 37A of the first terminal 20 and the second terminal 30 with a predetermined contact pressure, and is locked by the locking portion 45A of the metal fitting 40. Detachment is reliably prevented at the portion F3.

  In the present invention, even if the first terminal 20 is assembled to the housing 10 from the front and the second terminal 30 is assembled from the rear as described above, the lower part of the corresponding first cam portion 55 and second cam portion 56 is used. Since the cam edges 55A and 56A are set with a certain radius difference, the first cam portion 55 and the second cam 56 are always in direct contact with the first terminal 20 and the second terminal 30, respectively. Manufacturing errors and assembly errors can be eliminated, and the variation in the amount of displacement of the upper arm portions 21; 31 is extremely small between the terminals, so that the contact pressure between the terminals and the flat conductor is stabilized. In the present invention, the contact portion 28A of the first terminal 20 with the first cam portion 55 is positioned upward, and the cam radius of the second cam portion is set large in the second terminal 30. The center of movement can be positioned upward, and even when the length of the operation portion 51 of the movable member 3 is reduced, the operation portion protrudes upward from the housing in the state where the movable member is in the open position. The amount of protrusion of the connector in the front-rear direction of the connector at the closed position does not increase, while the amount of the movable member is secured to make the movable member easy to operate. Can be miniaturized.

  In the present embodiment, the first cam portion 55 is in an open position in FIG. 2A, and is slightly lower than the upper end of the arcuate portion 28A-2 of the contact portion 28A of the first terminal 20 and an upper portion. It is preferable that the upper portion 55C to be cut is cut so as to be sunk more than the circle on the lower cam edge 55A. Thus, when the first cam portion 55 starts to rotate toward the closed position, the upper portion 55C does not catch on the upper end corner portion 28A-3 of the arc-shaped portion 28A-2. It can move smoothly to the range of 28A-2.

  In the present invention, the lower cam edge of the first cam portion and the second cam portion is formed in an arc shape, but other curves may be used as long as the cam radius difference at an arbitrary angle is constant. Furthermore, the lower cam edge may be an arc as a whole of the range or another curve as an envelope, and may be cut out at a part of the range.

  Further, in the present invention, when corresponding to the case where the connection circuit portion is formed on the upper surface of the flat conductor, the first and second terminals do not need to have a contact portion on the lower arm portion, The pressing portion of the upper arm portion can also serve as a contact portion and come into contact with the connection circuit portion. Furthermore, a terminal having a contact portion in the lower arm portion and a terminal in which the pressing portion of the upper arm portion also serves as the contact portion can be mixed to form a so-called both upper and lower contacts or a staggered arrangement.

DESCRIPTION OF SYMBOLS 1 Connector 32 Lower arm part 3 Movable member 33 Connection part 10 Housing 38A Contact part 16 Reception opening part 55 1st cam part 20 1st terminal 55A Lower cam edge 21 Upper arm part 55B Upper cam edge 22 Lower arm part 56 2nd cam Part 23 Connecting part 56A Lower cam edge 28A Contact part 56B Upper cam edge 30 Second terminal F Flat conductor 31 Upper arm part

Claims (3)

A plurality of terminals made by maintaining a flat plate surface of the metal plate and extending in the front-rear direction and having an upper arm part and a lower arm part connected by a connecting part at an intermediate part in the front-rear direction; A housing in which a terminal groove that is arranged and held in a direction perpendicular to the plate surface and a receiving opening for a flat conductor that opens to the rear is formed, and the flat conductor can be inserted into the receiving opening. And a movable member movable between a closed position in which the inserted flat conductor is pressed by the upper arm, and a plurality of terminals are mounted on the terminal groove from the front side. And a second terminal mounted from the rear side, the flat conductor is inserted into the receiving opening with the movable member in the open position, and the movable member moves to the closed position. In this case, the cam portions formed on the movable member are the upper arms of the first terminal and the second terminal, respectively. Front of the flat conductor electrical connector for pressurizing the flat conductive downward by lift upwards to elastically displace the rear portion of the upper arm portion to the lower,
The lower arm portion of the first terminal has a contact portion with a cam portion formed in a front portion of the connecting portion, and is positioned above the contact portion of the second terminal in the vertical direction. The cam portion has a first cam portion and a second cam portion at positions corresponding to the first terminal and the second terminal in the terminal arrangement direction, respectively, and the first cam portion and the second cam portion are around a common axis. And an upper cam edge and a lower cam edge that contact the front portions of the upper and lower arm portions of the first terminal and the second terminal, respectively. Each lower cam edge is formed with a constant difference between the cam radius lengths at any same angular position in the sliding contact range where the movable member rotates from the open position to the closed position. An electrical connector for a flat conductor, characterized in that   The flat-connector electrical connector according to claim 1, wherein the movable member has a lower cam edge of each of the first cam portion and the second cam portion formed in an arc shape.   The lower arm portion of the terminal has a concave curved portion along the lower cam edge in the sliding contact range of the first cam portion at the first terminal, and a straight portion extending in the front-rear direction at the second terminal. The electrical connector for flat conductors according to claim 1 or 2.

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