JP2012169296A - Electrical connector for circuit board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrical connector for circuit board which ensures locking of a flat type conductor.SOLUTION: In the electrical connector arranged on a circuit board and connecting an inserted flat type conductor electrically with the circuit board, a lock fitting 30 has a lower arm 32 in the rear, and a locking protrusion protruding upward while facing a locking part 31A vertically. When a movable member 60 is at a close position, the locking part 31A rushes from above and the locking protrusion rushes from below into a cut formed as a locked part F2 on the side edge of the flat conductor F. Consequently, the lock fitting 30 can be locked to the locked part F2 in the cross direction.

Description

  The present invention relates to an electrical connector for a circuit board.

  In this type of connector, a flat conductor such as FPC is inserted and connected in parallel with the surface of the circuit board. In general, the flat conductor has a hooked portion in the form of an ear or a hole formed on the side edge thereof, and the locking portion of the lock fitting of the connector is locked to the locked portion, so that the flat conductor Prevents inadvertent omission.

  In Patent Document 1, there is provided a horizontal H-shaped lock fitting (lock member) having an upper arm portion and a lower arm portion connected by a connecting portion, which is substantially the same as a terminal (contact). The upper arm portion extends horizontally rearward on the flat conductor insertion side from the connecting portion, and a claw-shaped lock portion (engagement portion) is formed at the rear portion. The lock portion has a substantially inverted triangular shape that protrudes downward toward the flat conductor, and when the connector is used, the movable member (slider) moves to a closed position that presses the flat conductor against the contact portion of the terminal. Then, the upper arm portion of the lock fitting is lifted up by the cam portion of the movable member at the front portion thereof, and the rear portion of the upper arm portion is tilted downward by the lever principle, and therefore the lock portion is displaced downward. As a result, the locking part engages with the front edge of the locked part from above to the locked part formed as a notch or hole in the flat conductor inserted between the upper arm part and the lower arm part. Thus, the flat conductor is prevented from being inadvertently removed.

JP 2004-221667 A

  In the connector of Patent Document 1, in order to prevent inadvertent disconnection of the flat conductor, it is only the lock portion of the lock fitting that is locked to the locked portion of the flat conductor, The locking portion is locked to the locked portion from above, that is, from one side with respect to the surface of the flat conductor. However, the lock portion has a substantially inverted triangle. Therefore, even when the flat conductor is in a normal connection state with a predetermined contact pressure with the contact portion of the terminal, when the flat conductor is pulled strongly in the extraction direction, the locked portion of the flat conductor is A force in the pulling direction is applied to the front oblique edge of the lock portion of the substantially inverted triangle. This force causes an upward component at the front bevel, causing the rear portion of the upper arm portion of the lock fitting to return upward, thereby reducing the amount of displacement of the rear portion, that is, the lock portion. That is, the locking portion reduces or removes the amount of locking with the locked portion, which may cause an accidental disconnection of the flat conductor.

  In view of such circumstances, the present invention provides an electrical connector for a circuit board that uses a lock metal fitting, and under the normal connection state of the flat conductor, there is an inadvertently strong force in the extraction direction of the flat conductor. Even if it acts, the locking part always keeps the amount of locking with the locked part, or by reinforcing the locked part so that the locking state does not change, the prevention of disconnection is further ensured It is an object of the present invention to provide an electrical connector for a circuit board that can be realized.

  An electrical connector for a circuit board according to the present invention is an electrical connector that is disposed on a circuit board and electrically connects an inserted flat conductor to the circuit board, and maintains a flat plate surface of the metal plate. A contact portion that is made and contacts the flat conductor, a connection portion that is connected to the circuit board, a pressing portion that presses the flat conductor, and a pressure receiving portion that receives a force for displacing the pressing portion in the pressing direction are provided. A plurality of terminals arranged in a direction perpendicular to the plate surface, and a lock portion that is made by maintaining a flat plate surface of a metal plate in the same manner as the terminals and is locked by locking with a flat conductor, the lock A receiving space that receives a force for displacing the portion is provided, and a receiving space is formed for receiving the connecting portion of the lock metal fitting and the inserted flat conductor so that the terminal and the plate surface are parallel to each other. Hold the terminal at a position where the contact portion contacts the flat conductor. And a housing for holding the lock fitting, and a pressing portion for applying a force to the terminal and the pressure-receiving portion of the lock fitting, and an open position that allows insertion of the flat conductor and the flat conductor to the terminal A movable member that can move between a closed position that presses the contact portion of the flat conductor and moves the lock portion to the locked position. The arm portion is formed by being connected by a connecting portion at a longitudinal intermediate position thereof, and the terminal has a pressure-receiving portion at the front portion of the flat conductor insertion direction ahead of the connecting portion and a pressing portion at the rear portion of the terminal. The lock metal fitting has an upper arm portion having a pressure-receiving portion at the front portion and a protruding lock portion at the rear portion.

  In such an electrical connector for a circuit board, in the present invention, the lock fitting has a locking projection that protrudes upward while facing the lock portion in the vertical direction at the lower arm portion at the rear portion, When the movable member is in the closed position, the locking portion enters the notch recess formed as the locked portion on the side edge of the flat conductor from above and the locking projection enters from below, It can be locked in the front-rear direction with the locked portion.

  In the present invention having such a configuration, when the flat conductor is inserted to a predetermined position on the mounting surface, the locked portion of the flat conductor is formed on the lock fitting held by the housing. It has an overlapping range with the locking projection in the vertical direction at the front position relative to the locking projection, that is, in the thickness direction of the flat conductor. That is, the locking portion of the lock fitting projects from above into the locked portion of the flat conductor, and the locking projection of the lock fitting enters from below.

  In this way, the locking portion and the locking projection protrude from above and below the above-mentioned locked portion, so that the flat conductor can be locked in the pulling direction even if the flat conductor is displaced in any direction. Locking with the metal fitting is maintained. Moreover, since the flat conductor is pressed downward by the pressing portion of the terminal, the deviation remains in the overlapping range with the locking projection of the lock fitting, and the force on the flat conductor is accompanied by an upward component. Even if the flat conductor is lifted up, the locking portion of the lock fitting enters the locked portion of the flat conductor by the force from the pressing portion, and the locking with the lock fitting is maintained. .

  As described above, according to the present invention, when the movable member is in the closed position, the lock fitting is inserted into the locked portion of the flat conductor from above and the locking projection from below. Can be locked to the locked portion in the front-rear direction, and the flat conductor is reliably prevented from coming off. In addition, since the flat conductor is pressed downward by the pressing portion of the terminal, the upper arm portion of the lock fitting on which the lock portion is formed is connected to the locking portion of the flat conductor from the locking projection of the lock fitting. Excessive displacement such as coming off from the lock part of the lock metal fitting is also prevented, so that the state where the lock part and the locking projection have entered the locked part from above and below is stably secured.

It is a perspective view which shows a part of electric connector for circuit boards as this embodiment, and the flat conductor inserted in this. FIG. 2 is a cross-sectional view of the connector of FIG. 1 in which the movable member is in the open position and the flat conductor is inserted before insertion, (A) is the terminal arrangement direction, the position of one of the two types of terminals, and (B) FIG. 6C is a cross-sectional view at the position of another type of terminal and at the position of the lock fitting. FIG. 3 is a cross-sectional perspective view at a position corresponding to the cross-sectional view of FIG. It is a cross-sectional view of the vicinity of the left end portion at the position of the connecting portion of the terminal and the lock fitting for the connector of FIG. It is a cross-sectional view in the position of the connection part which shows the modification about the example of FIG. It is a longitudinal cross-sectional view in the position of the connection part which shows the other modification about the example of FIG. It is a figure which shows the principle of a cam part, (A) is a figure about the cam part of FIG. 2 (A), (B), (B) is a figure about the cam part as a modification. FIG. 3 is a view corresponding to FIG. 2, and shows the state after the insertion of the flat conductor with the movable member in the open position. It is a figure corresponding to FIG. 2, Comprising: The time when a movable member comes to a closed position after insertion of a flat conductor is shown. The other embodiment is shown and it is a partially broken front view when a part of connector is seen from back. It is a longitudinal cross-sectional view of the connector of FIG. 10, (A) is a position of the lock metal fitting in the terminal arrangement direction, (B) is shown in a cross section at a position slightly shifted to the connector side end from the position of (A). Yes. It is sectional drawing in the lock metal fitting position which shows other embodiment, (A) shows the time when a movable member is in an open position, (B) is in a closed position.

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

  FIG. 1 is a perspective view showing the whole electrical connector for circuit boards (hereinafter referred to as “connector”) according to the present embodiment and a connecting portion of a front end portion of a flat conductor connected to the connector.

  The flat conductor F has a sheet removed so that the coating is removed on the lower surface of the tip and the conductor (not shown) is exposed, and the upper surface protrudes further forward toward the connector 1 than the conductor. A reinforcing material F1 is attached. The reinforcing material F1 has a notched engaged portion F2 formed on the left and right side edges in front of the conductor portion.

  The connector 1 has terminals 10; 20 made of a metal plate, a lock fitting 30, a housing 40 that holds these, and a movable member 60 that is rotatably supported by the housing 40.

  Both the terminals 10; 20 and the lock fitting 30 are made while maintaining the flat surface of the metal plate. The terminals are composed of two types of terminals 10; 20, which are arranged so as to be alternately arranged in a direction perpendicular to the plate surface of the terminals 10; 20, and terminals 10; 20 located at both ends in the same direction. A lock fitting 30 is provided adjacent to.

  As shown in FIGS. 2A and 2B, which are cross-sectional views of the terminals 10; 20, the two types of terminals 10; 11; 21; lower arm portion 12; 22; and connecting portions 13; 23 for connecting both arm portions at their longitudinal intermediate portions. The upper arm portion 11; 21 has a pressed portion 14; 24 pressed against the front portion of the flat conductor F in the insertion direction by a cam portion of a movable member described later, and a pressing portion 15 that presses the flat conductor from above on the rear portion. 25 is formed. At the front part of the lower arm part 12; 22, a support part 16; 26 for the cam part is formed, and at the rear part, a contact part 17; 27 for contacting the conductor part of the flat conductor is formed. Further, the lower arm portions 12; 22 are provided with connection portions 18; 28 for solder connection with the circuit board.

  The common points of the two types of terminals 10 and 20 have been described above. Next, differences will be described.

  As shown in FIG. 2A, the upper arm portion 11 of the terminal 10 has a depressed portion 14 provided at the lower edge of the front portion, and extends long backward from the connecting portion 13. A protruding pressing portion 15 is provided at the rear end. On the other hand, as shown in FIG. 2B, the upper arm portion 21 of the terminal 20 is formed with a straight edge on the pressure-receiving portion 24 provided on the lower edge of the front portion. A portion extending rearward is shorter than the case of the terminal 10, and a protruding pressing portion 25 is provided at the rear end thereof.

  As shown in FIG. 2A, the lower arm portion 12 of the terminal 10 has a connecting portion 18 formed at a portion extending forward from the connecting portion 13 and extending out of the housing 40. The connecting portion 18 also has a groove-shaped fixing portion 18A that is concavely bent downward. A support portion 16 is formed in a portion between the connecting portion 13 and the connecting portion 18 so that the upper edge is concave and the cam portion is accommodated. On the other hand, as shown in FIG. 2B, the lower arm portion 22 of the terminal 20 has a substantially straight edge on the upper edge of the portion extending forward from the connecting portion 23, and a support portion 26 is formed. A rearward extending portion extends out of the housing 40, and has a connecting portion 28 and a fixing portion 28A that are substantially symmetric with respect to the connecting portion 18 of the terminal 10. The lower arm portion 22 of the terminal 20 is provided with a projecting contact portion 27 at a position corresponding to the pressing portion 25 of the upper arm portion 21 at an intermediate portion between the connecting portion 23 and the connecting portion 28 in the front-rear direction.

  As shown in FIG. 1, the two types of terminals 10; 20 formed in this manner are alternately arranged with the terminals 10 attached to the housing 40 from the front and the terminals 20 from the rear.

2C and 3, the lock fitting 30 has a horizontal H shape similar to the terminal 20, and, like the terminal 20, has an upper arm portion 31 and a lower arm portion 32, Are connected by a connecting portion 33 at an intermediate portion in the longitudinal direction. In the front portion of the lock fitting 30, both the upper arm portion 31 and the lower arm portion 32 have the same form as the terminal 20, and the pressure-receiving portion 34 has a straight edge at the front portion of the upper arm portion 31. A support portion 36 having a substantially straight edge is formed at the front portion of the lower arm portion 32. The rear portion of the lock fitting 30 is different from the terminal 20 in taste. The rear portion of the upper arm portion 31 is longer than the terminal 20 and is substantially the same as the terminal 10 and forms a lock arm 31A extending rearward. The rear end is provided with a relatively large protruding lock portion 35 facing downward. The lock arm 31A extends obliquely upward and rearward. The lock arm 31A moves downward with the connecting portion 33 as a fulcrum when the pressed portion 34 is pressed by a cam portion of a movable member in a closed position, which will be described later, and lifted upward and displaced. As a result, it comes to a substantially horizontal position. In this case, even if the lock arm 31A is not in a completely horizontal position, even if a slight inclination remains, the lock arm 31A may be in a substantially horizontal posture. For example, a lock arm having an inclination when the movable member is in the open position reduces the inclination angle when the movable member comes to the closed position, but is slightly closer to the horizontal position. Even if there is a slight inclination on the opposite side beyond the horizontal position, if the inclination is small, it can be said to be a substantially horizontal position. In the projecting lock portion 35 provided at the rear end of the lock arm 31A, the front edge 35A has a substantially vertical edge, and the rear edge 35B is inclined forward and downward. The lock portion 35 interferes with the front end edge of the flat conductor F when the flat conductor F is inserted in a state where the upper arm portion 31 is not subjected to the force from the cam portion at the pressed portion 34. The positional relationship in the height direction. A fixing leg 38 having the same form as that of the connecting portion 28 of the terminal 20 is provided at the rear end of the lower arm portion 32, and a groove-like fixing portion 38A is formed there.

  The housing 40 for holding the terminals 10; 20 and the lock fitting 30 is made of an electrical insulating material and has a relatively flat, substantially rectangular parallelepiped outer shape as shown in FIG. 1, as shown in FIG. A terminal holding groove 41; 42 and a lock fitting holding groove 43 for holding the terminals 10; 20 and the lock fitting 30 are formed through the front and rear (right and left in the figure). The terminal holding grooves 41; 42 and the lock fitting holding groove 43 are arranged in FIG. 2 so as to hold the plate-like terminals 10; 20 and the lock fitting 30 so as to face each other while maintaining a slight gap. Thus, it is formed as a slit having a groove width corresponding to the plate thickness in a direction perpendicular to the paper surface. With respect to the terminal holding grooves 41; 42 and the lock fitting holding groove 43, the terminals 10; 20 and the lock fitting 30 are locked to the groove bottom by the projections 19; 29 and the projection 39 formed on the lower edges thereof. Holds firmly at the top and bottom edges. Further, the terminal holding grooves 41; 42 and the lock fitting holding groove 43 communicate with a front space 44 which is largely cut upward at the front portion of the housing 40, and further from the intermediate position to the rear in the front-rear direction. It communicates with the insertion groove 45 as a receiving space for the flat conductor F formed in the direction. By forming the insertion groove 45, the housing 40 has an upper wall 46 and a lower wall 47 at the upper and lower positions thereof, and the terminal holding grooves 41; 42 are formed as opening grooves on the surfaces of the upper wall 46 and the lower wall 47. It takes a form. The upper wall 46 is formed in a slit shape at the position of the lock fitting 30 with a groove portion 48 through which the lock arm 31A of the lock fitting 30 enters vertically. The lower wall 47 has a front end that is thin with a substantially tapered shape with respect to the terminal 10 and forms a holding portion 47A to which the groove-shaped fixing portion 18A of the terminal 10 is fitted. Are formed at the rear end in the same manner as the holding portions 47A for the fixing portions 28A and 38A of the terminal 20 and the lock fitting 30, respectively. Further, the terminal holding groove 41 for the terminal 10 opening upward at the lower wall 47 has a groove bottom 41B at the rear so as to allow the rear portion of the lower arm portion 12 of the terminal 10 to bend downward. The groove depth is gradually increased.

  As can be seen from FIG. 1, the housing 40 has extended portions 49 extending rearward from the rear edge in the range between the lock fittings 30 at both ends including the terminal arrangement range at both ends in the terminal arrangement direction. Is provided. As shown in FIG. 2, the extended portion 49 has a lateral U-shape when viewed from the rear, and both side edges of the flat conductor F in the width direction (the range where the locked portion F <b> 2 exists in the width direction). ) Is received from the rear, both end portions in the width direction of the insertion groove 45 are formed. The extending portion 49 has upper and lower tapered introduction surfaces 49A and 49B at the rear entrance. The inner surface and upper and lower inner surfaces of the insertion groove 45 in the extending portion 49 form a restricting portion 50 that restricts the position of the inserted flat conductor F in the width direction and the upper and lower direction. Further, a locking protrusion as a protrusion that is locked to the locked portion F2 of the flat conductor F is formed on the lower inner surface at the same level as the mounting surface when the flat conductor is inserted. 51 is provided. As can be seen from FIG. 1, the locking protrusion 51 is located at a position shifted from the lock fitting 30 in the terminal arrangement direction, and in the front-rear direction, the lock projection 51 is locked as shown in FIG. It is provided at substantially the same position as the portion 35. The locking projection 51 has a trapezoidal longitudinal section, with the front edge 51A being a vertical surface and the rear edge 51B being a tapered surface. The upper surface 51C of the locking projection 51 is a flat surface, and is positioned below the lower end of the lock portion 35 as shown in FIG. 2C showing the movable member in the open position. When the lock part 35 is displaced downward by the member being in the closed position, the height is set so as to be located above the lower end of the lock part 35. When the movable member is in the open position, as shown in FIGS. 2A and 2B, the upper surface of the locking projection 51 is provided on the lower arm portion 12; 22 of the terminal 10; 20. It is located below the upper end of the contact part 17; 27.

  Thus, in the present invention, when the movable member comes to the closed position, the lock portion 35 and the locking projection 51 are complementarily locked to the locked portion F2 of the flat conductor from above and below. It becomes like this. Therefore, as in the above-described example, when the movable member comes to the closed position, the upper surface 51C of the locking projection 51 does not necessarily need to be positioned above the lower end of the lock portion 35. It may be located below, and the effect by the above complement is still obtained. Furthermore, in the present invention, the locking protrusion may not be formed from the housing, but may be formed on another member held by the housing, for example, a reinforcing metal fitting, and further has a lock arm portion. The metal fitting itself may be formed to face the lock portion.

  The terminals 10; 20 and the lock fitting 30 are firmly held at the groove bottoms of the terminal holding grooves 41; 42 and the lock fitting holding groove 43 for the terminals 10 and 20 as described above. Although a gap is formed, the gap between the terminals 10; 20 and the plate surface of the lock fitting 30 varies depending on the location of the terminals 10; 20 and the lock fitting 30, that is, the groove width. There are wide and narrow.

  As shown in FIG. 4 which shows a cross section at the height where the connecting portions 13; 23 and 33 are located, the terminal holding grooves 41; 42 and the lock fittings in the respective regions including the connecting portions 13; 23; The groove width of the holding groove 43 is larger than the groove width in other regions, and the wide portions 41A; 42A; 43A are formed. In the regions of the wide portions 41A; 42A; 43A, gaps h1, h2, h3 wider than the other regions are formed between the terminals 10; 20 and the plate surface of the lock fitting 30, respectively. In the present embodiment, h1 = h2. The wide portions 41A and 42A corresponding to the terminals 10 and 20 arranged alternately in the terminal arrangement direction are shifted in the front-rear direction (vertical direction in FIG. 4). In FIG. 4, it can be clearly seen that the above-described locking projection 51 is positioned so as to be displaced from the lock fitting 30 in the terminal arrangement direction and is close to the lock fitting 30. In the example of FIG. 4 described above, since the connecting portions 13; 23 of the terminals 10; 20 are provided at different positions in the front-rear direction, the wide portions 41A; 42A are formed in regions corresponding to the connecting portions 13; 23 in the front-rear direction. The wide portions 41 </ b> A and 42 </ b> A are also shifted in the front-rear direction. On the other hand, as a different form, when the connecting portions 13; 23 of the terminals 10; 20 are at the same position in the front-rear direction as shown in FIG. 5, the wide portions 41A; You may form so that it may transfer to part 41A; 42A. Furthermore, since the connection part 13; 23 has the length in the up-down direction corresponding to the space | interval of both arm parts as a form which connects the upper arm part 11; 21 and the lower arm part 12; 22, Even when the connecting portions 13; 23 are in the same position in the front-rear direction, as shown in FIG. 6, the wide intervals 41A; May be formed.

  As shown in FIG. 1, the connector 1 is provided with a movable member 60 made of an electrical insulating material so as to be rotatable. The movable member 60 is located in a front space 44 formed in the front portion of the housing 40. The movable member 60 extends over the width (dimension in the terminal arrangement direction) of the housing 40, and is tilted laterally from an open position in a standing posture as seen in FIGS. 2 (A) to 2 (C). 9 (A) to 9 (C) are rotatable between the closed positions. The movable member 60 gives a downward displacement to the rear portions of the terminals 10; 20 and the upper arm portions 11; 21 and 31 of the lock fitting 30, and the open position is the insertion of the housing 40 before this displacement occurs. The position of the movable member 60 at which the flat conductor F can be inserted into the groove 45, while the closed position is a position where the flat conductor F after insertion is pressed down.

  The movable member 60 has an operation portion 61 that protrudes upward from the front space 44 as shown in FIGS. 2A to 2C in the open position, and is moved back and forth at a site below the operation portion 61. A slit-like groove 62 passing therethrough is formed. The groove 62 is formed at a position corresponding to each terminal 10; 20 and the lock fitting 30 in the terminal arrangement direction, and the groove width of the groove 62 (with respect to the paper surface in FIGS. 2A to 2C). The width dimension in the groove in the direction perpendicular to each other is slightly larger than the corresponding thickness of the terminals 10; 20 and the lock fitting 30. At the lower part of the groove portion 62, cam portions 63; 64; 65 corresponding to the terminals 10; 20 and the lock fitting 30 are provided as pressure portions for the terminals 10; 20 and the lock fitting 30, respectively. Each cam part 63; 64; 65 is formed so that the groove | channel inner surfaces which the groove part 62 opposes may be connected.

  The cam portion 63 provided corresponding to the terminal 10 has an oblong cross-sectional shape that is horizontally long when the movable member 60 is in the open position, as shown in FIG. It exists in the concave support part 16 formed in the front upper edge of the part 12, and is in a non-contact state with a space | interval with respect to the to-be-pressed part 14 of the upper arm part 11. FIG. The lateral length of the cam portion 63 in FIG. 2A is set to be larger than the distance between the support portion 16 and the pressure-receiving portion 14 in FIG. Therefore, when the movable member 60 comes to the closed position, as will be described later, the cam portion 63 takes a vertically long posture and presses the pressure-receiving portion 14 upward to be elastically displaced.

  As seen in FIG. 2B, the cam portion 64 provided corresponding to the terminal 20 is formed by the laterally long oval cam portion 63 for the terminal 10 when the movable member 60 is in the open position. It has a cross-sectional shape in which the upper right corner is deformed into a square shape and is in contact with the support portion 26. Further, the height dimension in the figure is also larger than that of the cam portion 63. Therefore, the cam portion 64 has a semicircular shape at the left portion and a rounded shape at the lower portion while having a flat surface at the right portion. When the movable member 60 is in the open position, the cam portion 64 is also in a non-contact state with a gap with respect to the pressure-receiving portion 24 formed on the upper arm portion 21 of the terminal 20, and the movable member 60 has come to the closed position. Sometimes, a vertically long posture is applied, and the pressed portion 24 is pressed upward to be elastically displaced.

  The cam portion 65 provided corresponding to the lock fitting 30 has a cross-sectional shape similar to the cam portion 64, but is formed on the upper arm portion 31 of the lock fitting 30 even when the movable member 60 is in the open position. It is in contact with the pressed part 34. When the movable member 60 comes to the closed position, the cam portion 65 presses the pressure-receiving portion 34 and elastically displaces it.

  When the movable member 60 comes to the closed position, the cam portions 63; 64 corresponding to the two types of terminals 10; 20, respectively, are viewed in the direction of their rotation axes, that is, in the direction perpendicular to the paper surface in FIG. The positional relationship is as shown in FIG. In FIG. 7A, when the movable member 60 is in the closed position, the cam portion 63 and the cam portion 64 which are in the vertically long posture are each subjected to reaction of the same force from the pressed portion 14 and the support portion 16 of the terminal 10. The forces A and B are received from the pressed part 24 and the support part 26 of the terminal 20 with the same reaction force C and D, respectively. The reaction forces A and B applied to one cam portion 63 are on one line X passing through the rotation center P of the cam with their action lines being coincident. On the other hand, the other cam portion 64 is wider than the cam portion 63 and the upper end arc is biased to the right side, so that the reaction force C from the pressure-receiving portion 24 is generated in the cam portion 63. The reaction force A is located on the right side of the reaction force A, and the reaction force from the support portion 26 acts on the flat bottom surface of the cam portion 64. It has an action line on the same line Y as the reaction force C. That is, when the cam portions 63 and 64 are viewed simultaneously, the reaction forces A and B are balanced on one line X, and the reaction forces C and D are balanced on another line Y away from the line X. Become. Therefore, both the cam portions 63 and 64 receive the reaction forces A and B that balance in the vertical direction and C and D that balance in the vertical direction at positions away from the rotation center P of the cam, so that the closed position is reached. A certain movable member 60 takes a neutral state in the closed position. Even if the movable member 60 is shifted from the neutral state in the open position direction or in the opposite direction, the movable member 60 is returned to the initial neutral state by the moments of the reaction forces A, B and C, D on the two lines X, Y. Will remain stable and neutral.

  Such a neutral state can be obtained by reversing the positional relationship of the reaction forces B and D with respect to the reaction forces A and C of the two types of cam portions 63 and 64. In FIG. 7 (B), when the two cam portions are formed so that the long axes of the two types of cam portions 63; 64 intersect when the movable member is in the closed position, reaction forces A and B of one cam portion 63 are obtained. And the action lines of the reaction forces C and D of the other cam portion 64 are also shifted from each other. However, when the two types of cam portions 63 and 64 are viewed simultaneously, the four reaction forces A, B, C, and D are simply replaced by the positions of the reaction forces B and D compared to the case of FIG. The overall balance is the same as in FIG. 7B. Therefore, also in this case, the neutral state is stabilized.

  Next, how to use the circuit board electrical connector of this embodiment configured as described above will be described.

  (1) First, the connector 1 shown in FIG. 1 is arranged at a predetermined position on a circuit board (not shown), and both the connection portions 18; 28 of the terminals 10; 20 and the fixing legs 38 of the lock fitting 30 are connected to the circuit. Solder connection is made with each corresponding part of the substrate. Solder may rise along the respective plate surfaces of the terminals 10; 20 and the lock fitting 30 from the connecting portions 18; 28 and the fixing legs 38 formed in the lower arm portions 12; However, since the lower arm portions 12; 22; 32 of the terminals 10; 20 and the lock fitting 30 are connected to the upper arm portions 11; 21; 31 only by the connecting portions 13; 23; 33, the solder temporarily rises. However, in order for the solder to reach the upper arm portions 11; 21; 31, the solder must pass through the connecting portions 13; 23; 33. However, as seen in FIGS. 4-6, the housing 40 forms a large gap at the wide portions 41A; 42A; 43A with respect to the connecting portions 13; 23; 33, so that the solder rise stops here. The upper arms 11; 21; 31 are not reached. This effect of preventing the solder from rising can also be obtained for the flux.

  (2) Next, as shown in FIGS. 2A to 2C, the movable member 60 is brought to an open position where it can be suspended, and prepared for insertion of the flat conductor F. When the movable member 60 is in the open position, the terminals 10; 20 and the pressed portions 14; 24; 34 of the lock fitting 30 are not receiving any force from the corresponding cam portions 63; 64; 65 of the movable member 60. Therefore, the pressing portions 15; 25 and the lock portion 35 are in the initial positions where they are not displaced, and the terminals 10; 20 are in a state where the flat conductor F can be easily received. Here, the lock fitting 30 is at a position where the lock portion 35 interferes with the insertion path of the flat conductor F as described above.

  (3) Thereafter, as shown in FIGS. 8A to 8C, the flat conductor F is inserted into the insertion groove 45 of the housing 40. At that time, the flat conductor F is regulated in the vertical and lateral positions by the regulating portion 50 of the extending portion 49 provided in the housing 40 extending rearward before contacting the terminals 10; 20. , Inserted at a predetermined position. Therefore, the terminals 10 and 20 do not receive excessive force from the flat conductor F upon insertion. When the flat conductor F is inserted, as described above, the movable member 60 is in the open position, and the pressing portions 15; 25 of the terminals 10; 20 are not yet displaced downward, so the terminals 10; 20 On the other hand, the flat conductor F enters between the upper arm portion 11; 21 and the lower arm portion 12; 22 without difficulty. When the flat conductor F is inserted, the lock metal fitting 30 is in a position where the lock portion 35 interferes with the flat conductor F as described above. Therefore, the flat conductor F moves forward while pushing up the lock portion 35 at its front end. To do. Since the locking arm 31A is inclined upward and backward from before the flat conductor F is inserted, when the abutting force from the flat conductor F is received at the inclined rear edge 35B of the locking portion 35, the upward movement of the locking arm 31A is reduced. The flat conductor F is easily moved forward by being deflected and displaced in a direction in which the inclination is increased by force. When the flat conductor F advances to a predetermined position, as shown in FIG. 8C, the lock portion 35 enters the locked portion F2 which is a notch portion of the flat conductor F, and the locked portion F2 at the front edge 35A. It will be in the state which can be latched with respect to the front edge. In this state, the lock arm 31A returns to the initial inclination. As can be seen from FIG. 8C, the locking portion 35 protrudes from above into the locked portion F 2 of the flat conductor F, and the flat conductor F is in contact with the locking protrusion 51 of the housing 40. The locked portion F2 is located at the position of the locking projection 51 in the front-rear direction, and is provided at a position different from the locking portion 35 in the terminal arrangement direction. And can be locked.

(4) Next, the movable member 60 is brought to the closed position in the clockwise direction as shown in FIG. In this closed position, the cam portions 63; 64; 65 of the movable member 60 are in a vertically long posture, the cam portion 63 is the pressed portion 14 of the terminal 10, the cam portion 64 is the pressed portion 24 of the terminal 20, and The cam portions 65 push up the pressed portions 34 of the lock fitting 30 upward. When the pressed portions 14; 24; 34 are lifted, the upper arms 11; 21; 31 of the terminals 10; 20 and the lock fitting 30 are respectively connected to the connecting portions 13; 23; 13; 23; 33, the rear part is inclined downward, and the pressing portion 15; 25 at the rear end is displaced downward. Thus, the terminal 10; 20 presses the flat conductor F downward by the pressing portion 15; 25 to increase the contact pressure between the flat conductor F and the contact portion 17; 27 of the terminal 10; Ensure and get a normal connection status. On the other hand, the lock fitting 30 takes a horizontal position by being displaced downward so that the lock arm 31 </ b> A inclined upward toward the rear is reduced. In this horizontal position, the lock portion 35 is displaced downward until it comes into contact with the lower arm portion 32, and the locking of the flat conductor F with the locked portion F2 is further strengthened. Further, since the flat conductor F is pushed downward by the pressing portions 15; 25 of the terminals 10; 20, the locking conductor 51 of the housing 40 enters the locked portion F2. Become. Thus, when the flat conductor F is pulled backward, the locking portion 35 enters the locked portion F2 from above and the locking projection 51 enters from below. The force is powerful and works reliably. In this state, that is, in a state where the movable member 60 is in the closed position, the cam portions 63; 64 are in the state shown in FIG. 7A and reliably maintain the neutral state. Even if it is rotated, it returns to its original neutral state.

  (5) Thus, when the flat conductor F is in a normal connection state, if it is pulled backward by an inadvertent external force, that is, in the extraction direction, the front edge of the locked portion F2 of the flat conductor F However, the lock portion 35 of the lock fitting 30 is pressed backward by the front edge 35A. Since the front edge 35A is vertical, the front edge 35A is firmly locked with the locked portion F2, receives a reaction force backward, and the lock arm 31A is pulled backward. However, the lock arm 31A is oriented in the horizontal direction when the movable member 60 is in the closed position and is not inclined with respect to the horizontal direction. Without this, the horizontal posture is maintained and the lock function is not weakened. It should be noted that the front edge 35A need not be completely vertical, but may be slightly inclined up and down as long as it is substantially vertical.

  The present invention is not limited to the form shown in FIGS. 1 to 9 and various modifications are possible. For example, the protrusion formed on the housing does not have to be a locking protrusion, and is formed higher than the mounting surface for the flat conductor around the locked portion of the flat conductor. You can also In the case of FIG. 10, the housing 40 is formed with a protruding portion 51 ′ that is high around the lock fitting 30 with respect to the mounting surface 52 when the flat conductor F is inserted. As can be seen from FIGS. 11A and 11B, the protrusion 51 ′ is formed to extend forward from the front periphery of the lock portion 35 of the lock fitting 30. In such a form, when the movable member 60 comes to the closed position, the flat conductor F is pushed downward toward the mounting surface 52 in the terminal arrangement range, and the side portion where the locked portion F2 is present is It is lifted relatively by the protrusion 51 'and warps in a concave shape in the width direction. That is, the locked portion F2 is lifted upward and is securely locked to the lock portion 35.

  Next, in the above-described embodiment, the lock arm 31A of the upper arm portion 31 of the lock fitting 30 is directed rearward without receiving any force from the movable member 60 on the pressed portion 34 when the movable member 60 is in the open position. When the movable member 60 is in the closed position, the pressure-receiving portion 34 of the upper arm portion 31 is pressed against the cam portion 65 of the movable member 60, and the lock arm 31A takes a horizontal posture. Accordingly, the lock portion 35 is displaced downward. In the present embodiment shown in FIG. 12, the upper arm portion 31 receives a force from the cam portion 63 in the open position, and the lock arm 31A tilts upward toward the rear. In the closed position, this force can be released to take a horizontal posture.

In FIG. 12A, the movable member 60 has a substantially semicircular cam portion 65 as a pressurizing portion at a portion that forms a boundary with the groove portion 62 at the lower edge of the operation portion 61. When the movable member 60 shown in FIG. 12A is in the open position, the cam portion 65 rides on the pressure-receiving portion 34 formed at the upper edge of the front arm portion 31 of the lock fitting 30 and The pressed part 34 is pressed downward. Therefore, the lock arm 31 </ b> A as the rear portion of the upper arm portion 31 is displaced so as to take a posture of inclining upward toward the rear with the connecting portion 33 as a fulcrum. When the movable member 60 is rotated around the shaft portion 66 and brought to the closed position shown in FIG. 12B, the cam portion 65 is disengaged from the pressed portion 34 and the displacement of the lock arm 31A is released. Thus, the lock arm 31A takes a horizontal posture.

  Further, according to the present invention, when the conductor portion is formed on the upper surface of the flat conductor, the terminal does not need to have a contact portion on the lower arm portion, and the pressing portion of the upper arm portion is not It can also serve as a contact part and contact the conductor part. 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 staggered arrangement.

10; 20 Terminal 34 Pressed part 11; 21 Upper arm part 35 Lock part 12; 22 Lower arm part 40 Housing 13; 23 Connecting part 45 Receiving space (insertion groove)
14; 24 Pressure-receiving part 49 Extension part 15; 25 Pressing part 50 Restricting part 17; 27 Contact part 51
18; 28 Connection portion 60 Movable member 30 Lock fitting 63; 64 Cam portion 31 Upper arm portion F Flat conductor 32 Lower arm portion F2 Locked portion 33 Connecting portion

Claims (1)

An electrical connector that is arranged on a circuit board and electrically connects the inserted flat conductor to the circuit board, and is made by maintaining a flat plate surface of a metal plate and makes contact with the flat conductor. , A connecting portion connected to the circuit board, a pressing portion that presses the flat conductor, and a pressed portion that receives a force for displacing the pressing portion in the pressing direction, and is arranged in a direction perpendicular to the plate surface A plurality of terminals, a lock portion that is made by maintaining a flat plate surface of a metal plate like the terminals and is locked by locking with a flat conductor, and a pressure that receives a force for displacing the lock portion Position where a receiving space is formed for receiving a connecting part of the inserted flat conductor, and a lock fitting disposed so that the terminal and the plate surface are parallel to each other, and the contact portion is in contact with the flat conductor A housing for holding the terminal and holding a lock fitting; A pressurizing part for applying a force to the pressed part of the terminal and the lock fitting is provided, and an open position enabling the insertion of the flat conductor and the flat conductor are pressed against the contact part of the terminal and the lock part is A movable member movable between a closed position and a closed position, and the terminal and the lock metal fitting have an upper arm portion and a lower arm portion extending in the longitudinal direction of the insertion direction of the flat conductor as a longitudinal intermediate position thereof. In the terminal, the upper arm part has a pressed part at the front part of the flat conductor insertion direction ahead of the connection part and a pressing part at the rear part, and the lock fitting has an upper arm part. In an electrical connector for circuit boards having a pressure-receiving portion at the front and a protruding lock portion at the rear,
The lock metal fitting has a locking projection that protrudes upward in the rear portion of the lower arm portion, facing the lock portion in the vertical direction, and when the movable member is in the closed position, the flat conductor The locking part can be inserted into the notch recess formed as a locked part on the side edge of the door from above and the locking protrusion from below, so that the lock fitting can be locked to the locked part in the front-rear direction. An electrical connector for a circuit board.

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