TWI472099B - Electrical connectors for circuit boards - Google Patents

Description

Electrical connector for circuit substrate

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

In such a connector, a flat conductor such as an FPC is inserted and connected in a state parallel to the surface of the circuit board. In the flat conductor, generally, a latched portion having an ear shape or a hole shape is formed at a side edge thereof, and the locking portion of the lock fitting of the connector is locked to the locked portion to prevent the flat conductor from being inadvertently detached. .

Patent Document 1 is provided with a horizontal H-shaped locking fitting (locking member) having an upper wrist portion and a lower wrist portion connected by a connecting portion, substantially the same as a terminal (contact), and an upper wrist portion of the locking fitting, The claw portion is formed to be horizontally extended toward the rear side of the insertion side of the flat conductor, and a claw-shaped locking portion (engagement portion) is formed at the rear portion. The locking portion is formed in a substantially inverted triangle shape that protrudes downward toward the flat conductor side, and when the connector is used, when the movable member (slider) moves toward the closed position for pressing the flat conductor toward the contact portion of the terminal The upper arm portion of the lock fitting is lifted by the cam portion of the movable member at the front portion thereof, and the rear portion of the upper arm portion is inclined downward by the lever principle, so that the lock portion is displaced downward. As a result, the locking portion is oriented from above: inserted between the upper wrist portion and the lower wrist portion The flat conductor is formed as a notch portion or a locked portion of the hole portion, and is locked to the leading edge of the engaged portion to prevent the flat conductor from being inadvertently detached.

[Previous Technical Literature] [Patent Literature] [Patent Document 1]

Japan Special Open 2004-221067

In the connector of Patent Document 1, in order to prevent the flat type conductor from being inadvertently detached, only the locking portion of the locking fitting is locked to the locked portion of the flat type conductor, and the surface of the locking portion with respect to the flat type conductor is from above. That is, the one side is locked to the above-mentioned locked portion. However, the lock portion is formed in a substantially inverted triangle shape. Then, although the contact portion of the flat conductor and the terminal has a predetermined contact pressure and is in a formal connection state, when the flat conductor is strongly pulled in the pull-out direction, the locked portion of the flat conductor is pulled out. The force in the direction is brought to the front bevel of the substantially inverted triangular locking portion. This force produces an upward component force at the front bevel, and as a result, the rear portion of the upper wrist of the locking fitting is returned upward, reducing the amount of displacement of the rear portion, that is, the locking portion. In other words, there is a case where the amount of locking of the locking portion and the locked portion is reduced or the inadvertent flat conductor is dropped.

The present invention is directed to a circuit board using a locking fitting in view of such a situation. An electrical connector is an object of providing an electrical connector for a circuit board. In a state in which the flat conductor is in a normal connection state, the locking portion is locked even if a strong force is inadvertently applied to the direction in which the flat conductor is pulled out. The amount of locking of the part can be kept large at any time, or by fixing the locked portion so that the locked state does not change, and the prevention of falling off can be surely achieved.

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 the inserted flat conductor to the circuit board, and is provided with a flat plate surface that maintains the metal plate a contact portion that is in contact with the flat conductor, a connection portion that is connected to the circuit board, a pressing portion that presses the flat conductor, and a pressed portion that receives a force that displaces the pressing portion in the pressing direction, and the plate a plurality of terminals arranged in a direction at right angles; a locking portion that is formed by maintaining a flat plate surface of the metal plate and locked with the flat conductor, and for locking the locking portion, is provided in the same manner as the terminal a pressed portion of the position of the force is disposed as a locking fitting having a plate surface parallel to the terminal; and a receiving space for receiving the connecting portion of the inserted flat conductor is formed, and the contact portion is held in contact with the flat conductor a terminal for holding the lock fitting; and a pressurizing portion provided with a pressed portion for applying a force to the terminal and the lock fitting, Open position the flat conductive And a movable member that presses the contact portion of the flat conductor toward the terminal and moves the locking portion between the closed positions of the locking position; the terminal and the locking fitting are formed by the insertion direction of the flat conductor The upper arm portion and the lower arm portion extending in the axial direction are formed by connecting the connecting portions at an intermediate position in the longitudinal direction thereof, and the upper end portion of the wrist portion is pressed at a front portion closer to the front side in the insertion direction of the flat type conductor than the connecting portion. The portion has a pressing portion at the rear portion, and the upper portion of the locking fitting has a pressed portion at the front portion and a protruding locking portion at the rear portion.

In the electrical connector for a circuit board, the present invention is characterized in that the locking fitting has a locking protrusion that protrudes upward in the up-and-down direction with respect to the locking portion in the rear portion of the lower arm portion, and when the movable member is in the closed position, The locking portion enters the notch recessed portion as the engaged portion formed on the side edge of the flat conductor from the bottom from the lower side, and the lock fitting is engageable with the locked portion in the front-rear direction.

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

In this manner, since the lock portion and the locking projection are inserted from above and below with respect to the locked portion, even if the flat conductor is displaced in one direction in the vertical direction, the flat conductor can be maintained in the pull-out direction of the flat conductor. Locking accessories The card is stopped. Further, since the flat conductor is pressed downward at the pressing portion of the terminal, the offset is only in the range of overlap with the locking projection of the lock fitting, and even if the force toward the flat conductor is accompanied by the upward force, When 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 of the lock fitting is maintained.

As described above, in the present invention, since the locking member is in the closed position when the movable member is in the closed position, the locking portion enters the locked portion of the flat conductor from below from the upper side, so that the locking fitting can be in the front-rear direction. The above-described locked portion is locked, and the flat type conductor can be reliably prevented from coming off. Further, since the flat conductor is pressed downward at the pressing portion of the terminal, the upper arm portion of the lock fitting that forms the lock portion also prevents the locked portion such as the flat conductor from coming off from the projection of the housing and from the lock. Since the lock portion of the accessory is detached from the excessive displacement, the lock portion and the locking projection can be stably ensured from the up-and-down direction to the locked portion.

10, 20‧‧‧ terminals

11, 21‧‧‧ upper wrist

12, 22‧‧‧ lower wrist

13, 23‧‧‧ Linkage Department

14, 24 ‧ ‧ pressure department

15, 25‧‧‧ Pressing Department

17, 27‧‧‧Contacts

18, 28‧‧‧ Connections

30‧‧‧Locking accessories

31‧‧‧ upper wrist

32‧‧‧ Lower wrist

33‧‧‧Connecting Department

34‧‧‧Bes pressed

35‧‧‧Locking Department

40‧‧‧shell

45‧‧‧ Containment space (inserted into the ditch)

49‧‧‧Extension

50‧‧‧Restrictions

51‧‧‧ protrusion (locking protrusion)

60‧‧‧ movable components

63, 64‧‧‧ cam department

F‧‧‧flat conductor

F2‧‧‧The locked part

Fig. 1 is a perspective view showing a part of a flat-type conductor inserted into the connector as an electrical connector for a circuit board of the present embodiment.

Fig. 2 is a cross-sectional view of the connector of Fig. 1 with the movable member in the open position and before the flat type conductor is inserted, and (A) is the position of one of the terminals of the two terminals in the terminal arrangement direction, (B) In another terminal The position, (C) is a cross-sectional view of the position of the locking fitting.

Fig. 3 is a cross-sectional perspective view at a position corresponding to the cross-sectional view of Fig. 2(C).

Fig. 4 is a cross-sectional view showing the vicinity of the left end of the terminal of the connector of Fig. 1 and the position of the connection portion of the lock fitting.

Fig. 5 is a cross-sectional view showing the position of the joint portion in a modification of the example of Fig. 4.

Fig. 6 is a vertical cross-sectional view showing the position of the joint portion in another modification of the example of Fig. 4.

Fig. 7 is a view showing the principle of the cam portion, (A) is a view of the cam portion of Figs. 2(A) and (B), and (B) is a view of the cam portion of the modified example.

Fig. 8 is a view corresponding to Fig. 2, showing the movable member in the open position, after the flat type conductor is inserted.

Fig. 9 is a view corresponding to Fig. 2, showing that the movable member comes to the closed position after the flat type conductor is inserted.

Fig. 10 is a partial cross-sectional view showing a part of the connector as seen from the rear, showing another embodiment.

Figure 11 is a longitudinal sectional view of the connector of Figure 10, (A) showing the position of the locking fitting in the direction in which the terminals are arranged, and (B) showing the position slightly biased toward the side of the connector at the position (A). section.

Figure 12 is a cross-sectional view showing the position of the locking fitting of another embodiment, (A) showing the movable member in the open position and (B) showing its in the closed position.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 is a perspective view showing the entire connection of the electrical connector for a circuit board (hereinafter referred to as "connector") of the present embodiment and the connection portion of the distal end portion of the flat conductor to which the connector is connected.

The flat conductor F has a cover portion removed from the front end portion and a conductor portion (not shown) is exposed, and the sheet-shaped reinforcing member F1 is attached to the upper portion of the flat conductor F to protrude toward the connector 1 from the conductor portion. In the reinforcing material F1, a notched latched portion F2 is formed on the left and right side edges of the front side of the conductor portion.

The connector 1 has a terminal 10 and 20 made of a metal plate, a lock fitting 30, a case 40 for holding the above member, and a movable member 60 rotatably supported by the case 40.

The terminals 10, 20 and the locking fitting 30 are both made to maintain a flat surface of the metal plate. The terminal is composed of two types of terminals 10 and 20, and is arranged at an alternating position in a direction perpendicular to the plate faces of the terminals 10 and 20, and is provided adjacent to the terminals 10 and 20 located at both ends in the same direction.

The two kinds of terminals 10 and 20 are formed in a horizontal H-shape as shown in the second drawings (A) and (B) in the cross-sectional views of the terminals 10 and 20, and have upper arm portions 11 extending in the lateral direction, respectively. 21. The lower arm portions 12 and 22 and the connecting portions 13 and 23 that connect the two wrist portions in the intermediate portion in the longitudinal direction. The upper arm portions 11 and 21 are formed with the pressed portions 14 and 24 which are pressed by the cam portions of the movable member to be described later in the front portion which is the insertion direction of the flat conductor F. The pressing portions 15 and 25 that press the flat conductor from above are formed in the portion. The support portions 16 and 26 for the cam are formed in the front portion of the lower arm portions 12 and 22, and the contact portions 17 and 27 for contacting the conductor portions of the flat conductor are formed in the rear portion. Further, the lower arm portions 12 and 22 are provided with connecting portions 18 and 28 for soldering to the circuit board.

The above is described with respect to the common points of the two types of terminals 10 and 20, and then the differences will be described.

As shown in FIG. 2(A), the upper arm portion 11 of the terminal 10 has a pressed portion 14 provided at the lower edge of the front portion as a concave portion, and extends long from the connecting portion 13 toward the rear and is provided at the rear end thereof. There is a protruding pressing portion 15. On the opposite side of the upper arm portion 21 of the terminal 20, as shown in FIG. 2(B), the pressed portion 24 provided at the lower edge of the front portion is formed by a straight edge portion and extends rearward from the joint portion 23. The portion is shorter than the case of the terminal 10 described above, and a projecting pressing portion 25 is provided at the rear end thereof.

As shown in FIG. 2(A), the lower arm portion 12 of the terminal 10 is formed to extend forward from the connecting portion 13 and to form a connecting portion 18 at a portion extending outside the casing 40. The connecting portion 18 has a groove-shaped fixing portion 18A that is recessed downward. A portion between the connecting portion 13 and the connecting portion 18 is formed with a support portion 16 whose upper edge is formed in a concave shape for accommodating the cam portion. In contrast, as shown in FIG. 2(B), the lower arm portion 22 of the terminal 20 has a support portion 26 formed in a substantially straight edge portion at the upper edge of a portion extending forward from the coupling portion 23, and extends rearward. The portion extending outside the casing 40 has a connecting portion 28 and a fixing portion 28A which are substantially symmetrical with respect to the connecting portion 18 of the terminal 10. The lower arm portion 22 of the terminal 20 is in the front-rear direction in the middle of the joint portion 23 and the joint portion 28. A protruding contact portion 27 is provided at a position corresponding to the pressing portion 25 of the upper arm portion 21.

As shown in Fig. 1, the two kinds of terminals 10 and 20 thus formed are connected from the front side of the terminal 10 and the terminal 20 from the rear toward the casing 40, and are alternately arranged.

As shown in FIGS. 2(C) and 3, the lock fitting 30 is formed in a horizontal H-shape similar to the terminal 20, and has an upper arm portion 31 and a lower arm portion 32 similarly to the terminal 20, both of which are long. The intermediate portion in the axial direction is coupled by a connecting portion 33. In the front portion, the upper arm portion 31 and the lower arm portion 32 are formed in the same shape as the terminal 20, and the pressed portion 34 is formed at the front portion of the upper arm portion 31 as a straight portion. The front portion of the arm portion 32 is formed with a support portion 36 having a substantially straight edge portion. The rear portion of the lock fitting 30 has a difference from the above-described terminal 20. The rear portion of the upper arm portion 31 has a longer length than the terminal 20, and a locking arm 31A extending rearward is formed at substantially the same position as the terminal 10. At its rear end, there is provided a large protruding locking portion 35 that faces downward. The lock wrist 31A extends obliquely toward the rear upper side. When the pressed portion 34 is pressed by the cam portion of the movable member, which will be described later, in the closed position, the locking portion 31A is displaced upward by the lever portion, and the coupling portion 33 is displaced downward as a fulcrum. As a result, the pressed portion 34 is displaced downward. To a roughly horizontal position. In this case, the locking wrist 31A may be a posture that can be substantially called a horizontal posture even if it is not in a completely horizontal position or a slight inclination. For example, when the movable member has an inclined locking wrist when in the open position, when the movable member comes to the closed position, although the inclination angle becomes smaller and becomes close to the horizontal position, there is still a slight inclination, or even if the horizontal position is exceeded. And on the opposite side The tilt can be said to be substantially horizontal when the tilt is small. A projecting locking portion 35 provided at the rear end of the lock arm 31A has a front edge 35A formed as a substantially vertical edge and a rear edge 35B inclined toward the front lower side. In the state in which the upper arm portion 31 does not receive the force from the cam portion in the pressed portion 34, when the flat conductor F is inserted, the locking portion 35 is in the height direction that interferes with the front end edge of the flat conductor F. relationship. At the rear end of the lower arm portion 32, a fixing leg 38 of the same type as the connecting portion 28 of the terminal 20 is provided, and a groove-shaped fixing portion 38A is formed here.

The case 40 for holding the above-mentioned terminals 10, 20 and the lock fitting 30 is made of an electrically insulating material, and as shown in Fig. 1, is formed into a relatively flat substantially rectangular outer shape, as shown in Fig. 2, front and rear (in the figure) The right and left sides of the middle are formed with terminal holding grooves 41 and 42 and locking fitting holding grooves 43 for holding the terminals 10 and 20 and the lock fitting 30, respectively. The terminal holding grooves 41, 42 and the locking fitting holding groove 43 are configured to hold the plate-like terminals 10, 20 and the locking fitting 30 in a manner to maintain a slight gap with the plate surface thereof, and at right angles to the paper surface in Fig. 2 The direction is formed as a slit having a groove width equivalent to the thickness of the plate. 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 at the upper and lower edges by the projections 19, 29 and the projections 39 formed at the lower edges thereof. Keep it. The terminal holding grooves 41 and 42 and the lock fitting holding groove 43 communicate with the front space 44 which is largely notched upward in the front portion of the casing 40, and the flat conductor F formed from the intermediate position toward the rear in the front-rear direction. The insertion groove 45 as the accommodating space is connected. By the formation of the insertion groove 45, the housing 40 becomes upper and lower walls 46 and 47 at its upper and lower positions, and the upper wall 46 and The surface of the lower wall 47 and the terminal holding grooves 41 and 42 are in the form of an open groove. The upper wall 46 is formed in a slit shape by penetrating the groove portion 48 into which the locking arm 31A of the lock fitting 30 enters at a position of the lock fitting 30. The lower wall 47 is formed in a substantially tapered shape with respect to the terminal 10, and is formed as a holding portion 47A in which the groove-shaped fixing portion 18A of the terminal 10 is fitted, and is formed at the rear end with respect to the terminal 20 and the lock fitting 30. The terminal 20 and the holding portion 47A for each of the fixing portions 28A and 38A of the lock fitting 30. The terminal holding groove 41 for the terminal 10 that is opened upward by the lower wall 47 is configured to allow the rear portion of the lower arm portion 12 of the terminal 10 to be bent downward, and the groove bottom 41A is formed in a tapered shape toward the rear, and the groove depth thereof is formed. It grows bigger in order.

The housing 40 is provided with an extending portion 49 extending rearward from the rear end edge of the range between the locking fittings 30 at both ends of the terminal array range, as determined from the first drawing. As shown in FIG. 2, the extending portion 49 has a U-shaped shape as viewed from the rear, and accommodates both sides in the width direction of the flat conductor F from the rear (the range in which the locking portion F2 exists in the width direction). In the manner of the both ends of the insertion groove 45 in the width direction. The extending portion 49 has tapered inlet surfaces 49A and 49B on the upper and lower entrance portions. The inner side surface and the upper and lower inner surfaces of the insertion groove 45 of the extending portion 49 are formed with a restricting portion 50 for restricting the position of the inserted flat conductor F in the width direction and the vertical direction. In the lower inner surface of the same height as the mounting surface of the flat conductor insertion, the locking projection 51 as a projection that is locked to the locked portion F2 of the flat conductor F is provided. . The locking projection 51 is a position deviated from the lock fitting 30 in the terminal arrangement direction as seen from the first figure, and is in the front-rear direction. 2 (C), it is provided at substantially the same position as the lock portion 35 of the lock fitting 30. The locking projection 51 has a trapezoidal longitudinal section, the front edge 51A is a vertical surface, and the trailing edge 51B is a tapered surface. The upper surface 51C of the locking projection 51 is a flat surface as shown in FIG. 2(C) when the movable member is in the open position, and the height is set to be lower than the lower end of the locking portion 35, but by When the movable member comes to the closed position and the lock portion 35 is displaced downward, it is located above the lower end of the lock portion 35. When the movable member is in the open position, as shown in Figs. 2(A) and (B), the upper surface of the locking projection 51 is located at a position closer to the lower wrist portions 12, 22 of the terminals 10, 20. The upper ends of the portions 17, 27 are further below.

In the present invention, when the movable member comes to the closed position, the locking portion 35 and the locking projection 51 are complementarily locked from above and below the locked portion F2 of the flat conductor. Therefore, as in the above example, when the movable member comes to the closed position, the upper surface 51C of the locking projection 51 does not have to be located above the lower end of the locking portion 35, or may be located lower than the lower end of the locking portion 35, or may be Obtain the effect achieved by the above supplement. Further, in the present invention, the locking projection may be formed not by the housing, or may be formed by other members held by the housing, for example, a reinforcing fitting, and may also have a locking wrist. The fitting body is formed to face the locking portion.

As described above, 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, and a slight gap is formed between the terminals and the inner surface of the groove, and the terminal is formed. 10, 20 and the gap between the plate faces of the locking fitting 30, by the positions of the terminals 10, 20 and the locking fitting 30, there is a difference in size, that is, the groove width is wide and narrow.

As shown in FIG. 4 showing a cross section of the height of the positions of the connecting portions 13, 23 and 33, the terminal holding grooves 41 and 42 and the lock fitting holding groove 43 are provided in the respective regions including the connecting portions 13, 23 and 33. The groove width is larger than the groove width in other regions, and the wide portions 41A, 42A, and 43A are formed. In the region of the wide portions 41A, 42A, and 43A, between the terminals 10 and 20 and the plate surface of the lock fitting 30, gaps h1, h2, and h3 wider than the other regions are formed. In the present embodiment, h1 = h2. The positions of the wide portions 41A and 42A with respect to the terminals 10 and 20 which are alternately arranged in the terminal arrangement direction are shifted in the front-rear direction (the vertical direction in FIG. 4). In this Fig. 4, it is clear that the above-described locking projection 51 is displaced from the locking fitting 30 in the terminal arrangement direction, and is close to the locking fitting 30. In the example of the fourth embodiment, the connecting portions 13 and 23 of the terminals 10 and 20 are provided at positions different in the front-rear direction, and the wide portions 41A and 42A are provided in the regions corresponding to the connecting portions 13 and 23 in the front-rear direction. The positions of the wide portions 41A and 42A are also shifted in the front-rear direction. On the other hand, as the different types, the connecting portions 13 and 23 of the terminals 10 and 20, as shown in Fig. 5, may be formed in a tapered shape when they are at the same position in the front-rear direction. The parts are shifted forward and backward to the wide portions 41A, 42A. Further, the connecting portions 13 and 23 have a length in the vertical direction corresponding to the interval between the two arms as the type in which the upper arm portions 11 and 21 and the lower arm portions 12 and 22 are coupled. Therefore, even before the connecting portions 13 and 23 are in front and rear. The directions are at the same position, and as shown in Fig. 6, the wide portions 41A and 42A are provided at positions different in the vertical direction, and the upper and lower portions may be shifted to form large intervals h1 and h2.

As shown in Fig. 1, the connector 1 is rotatably provided with electricity. A movable member 60 made of an insulating material. The movable member 60 is located at a front space 44 formed at a front portion of the casing 40. The movable member 60 extends in a width (a dimension in the terminal arrangement direction) of the casing 40, and is turned from the open position in the vertical posture shown in FIGS. 2(A) to (C) to the horizontal direction. Figure 9 (A) ~ (C) can be freely rotated between the closed positions. The movable member 60 is for applying a downward displacement to the rear portions of the terminals 10, 20 and the upper wrist portions 11, 21, 31 of the locking fitting 30, and the so-called open position is flat before the displacement is generated. The position of the movable member F inserted into the insertion groove 45 of the casing 40 is on the other hand, and the so-called closed position is a position at which the inserted flat conductor F is pushed downward.

In the open position, the movable member 60 has an operation portion 61 that protrudes upward from the front space 44 as shown in FIGS. 2(A) to (C), and is formed to be penetrated forward and backward at a portion below the operation portion 61. A slit-shaped groove portion 62. The groove portion 62 is formed at a position corresponding to each of the terminals 10 and 20 and the lock fitting 30 in the terminal arrangement direction, and the groove width of the groove portion 62 (the second drawing (A) to (C) are at right angles to the paper surface. The in-groove width dimension is slightly larger than the corresponding plate thickness of the above-mentioned terminals 10, 20 and the locking fitting 30. In the lower portion of the groove portion 62, cam portions 63, 64, and 65 corresponding to the respective terminals 10, 20 and the lock fitting 30 are provided as the pressurizing portions for the terminals 10, 20 and the lock fitting 30. Each of the cam portions 63, 64, and 65 is formed to connect the opposing groove inner surfaces of the groove portion 62 to each other.

The cam portion 63 provided corresponding to the terminal 10 has a long circular cross section which is formed into a horizontal length when the movable member 60 is in the open position as shown in Fig. 2(A). The shape of the concave support portion 16 formed at the upper edge of the front portion of the lower arm portion 12 of the terminal 10 is in a non-contact state with respect to the pressed portion 14 of the upper arm portion 11. The lateral length of the cam portion 63 in Fig. 2(A) is set to be larger than the interval between the support portion 16 and the pressed portion 14 in the same drawing. Then, when the movable member 60 comes to the closed position, as will be described later, the cam portion 63 has a vertically long posture, and the pressed portion 14 is pressed upward to be elastically displaced.

As shown in FIG. 2(B), the cam portion 64 provided corresponding to the terminal 20 has the upper right corner portion of the horizontally long oblong cam 63 for the terminal 10 when the movable member 60 is in the open position. An angular cross-sectional shape is formed to be in contact with the support portion 26. The height dimension in this figure is also larger than the above-described cam portion 63. Thus, the cam portion 64 is semicircular in the left portion, has a flat surface in the right portion, and has a circular shape in its lower portion. The cam portion 64 is in a non-contact state with a gap with respect to the pressed portion 24 formed at the upper arm portion 21 of the terminal 20 when the movable member 60 is in the open position, when the movable member 60 comes to the closed position, In the vertically long posture, 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 that of the above-described cam portion 64, and is connected to the pressed portion 34 formed at the upper arm portion 31 of the lock fitting 30 even if the movable member 60 is in the open position. . When the movable member 60 comes to the closed position, the cam portion 65 presses the pressed portion 34 to be elastically displaced.

The cam portions 63, 64 corresponding to the two types of terminals 10, 20, respectively, when the movable member 60 comes to the closed position, is viewed from the direction of its rotation axis, that is, in the direction perpendicular to the paper surface in Fig. 2, as in the first 7 position of Figure (A) relationship. In the seventh diagram (A), when the movable member 60 is in the closed position, the cam portion 63 and the cam portion 64 in the vertically long posture are subjected to the reaction force A of the same force from the pressed portion 14 of the terminal 10 and the support portion 16, respectively. B, the pressed portion 24 of the terminal 20 and the support portion 26 receive the reaction forces C and D of the same force, respectively. The reaction forces A and B of the cam portion 63 toward one of the sides are aligned on the line X passing through the center of rotation P of the cam. On the other hand, the cam portion 64 on the other side is wider than the cam portion 63, and the arc of the upper end is biased to the right side, so that the reaction force C from the pressed portion 24 is located at a reaction force A higher than that of the cam portion 63. Further, the reaction force from the support portion 26 acts on the flat bottom surface of the cam portion 64, so that the center of the reaction force D becomes the center position, and as a result, it has the line of action on the same line Y as the above-described reaction force C. That is, when the cam portions 63, 64 are viewed at the same time, the reaction forces A and B are balanced on one line X, and the reaction forces C and D are balanced on the other lines Y leaving the line X. Then, both of the cam portions 63 and 64 are received at positions away from the rotation center P of the cam, and the reaction forces A and B which are balanced in the vertical direction and the reaction forces C and D which are also balanced in the vertical direction are The movable member 60 at the closed position is in a neutral state in the closed position. The movable member 60 is displaced from the neutral state toward the open position direction or the opposite direction, because the moments caused by the reaction forces A, B, and C, D on the two lines X, Y return to the original Neutral state, stable and neutral.

In the neutral state, the positional relationship between the reaction forces B and D of the two cam portions 63 and 64 with respect to the reaction forces A and C can be replaced. In Fig. 7(B), when the movable member is in the closed position, the two cam portions 63 are When the two cam portions are formed by the long axis crossing of 64, the lines of action of the reaction forces A and B of one of the cam portions 63 are shifted from each other, and the lines of action 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 observed at the same time, the four reaction forces A, B, C, and D are as compared with the case of the seventh figure (A), as long as the positions of the reaction forces B and D are reversed. A balance is achieved as in Figure 7 (B). In this case, the neutral state is also very stable.

Next, a method of using the electrical connector for a circuit board of the present embodiment configured as described above will be described.

(1) First, the connector 1 as shown in Fig. 1 is placed at a predetermined position on a circuit board (not shown), and the connecting portions 18 and 28 of the terminals 10 and 20 and the fixing legs 38 of the locking fitting 30 are placed. Soldering with each corresponding portion of the circuit board. The solder may rise from the respective plate faces of the terminals 10, 20 and the lock fitting 30 from the above-described connecting portions 18, 28 and the fixing legs 38 formed at the lower arm portions 12, 22, 32. However, the terminals 10, 20 and the lower arm portions 12, 22, 32 of the lock fitting 30 are connected to the upper arm portions 11, 21, 31 only by the connecting portions 13, 23, 33, so even if the solder rises, the solder reaches the upper wrist portion. 11, 21, 31, the solder must pass through the joints 13, 23, 33. However, as seen from Fig. 4 to Fig. 6, the casing 40 is formed with a large gap in the wide portions 41A, 42A, and 43A with respect to the joint portions 13, 23, and 33, so that the rise of the solder stops there. It does not reach the upper wrists 11, 21, 31. This effect of preventing solder from rising can also be obtained for a flux.

(2) Next, as shown in Fig. 2 (A) to (C), the movable member 60 is brought to the vertical opening position to prepare the insertion of the flat conductor F. in The movable member 60 is in the open position, and the pressed portions 14, 24, 34 of the terminals 10, 20 and the locking fitting 30 are not subjected to any force from the corresponding cam portions 63, 64, 65 of the movable member 60, so that the pressing portion 15, 25, 35 are not displaced at the initial position, and the terminals 10, 20 are in a state in which the flat conductor F is easily received. As described above, the lock fitting 30 has a pressing portion 35 at a position interfering with the insertion route of the flat conductor F.

(3) Then, as shown in Fig. 8 (A) to (C), the flat conductor F is inserted into the insertion groove 45 of the casing 40. At this time, the flat conductor F is restricted to the upper and lower sides and the side by the restricting portion 50 of the extending portion 49 provided at the casing 40 extending rearward before the terminals 10 and 20 are in contact with each other. Position insertion. Thus, when inserted, the terminals 10, 20 do not receive excessive force from the flat conductor F. When the flat type conductor F is inserted, as described above, the movable member 60 is in the open position, the pressing portions 15, 25 of the terminals 10, 20 are not displaced downward, and for the terminals 10, 20, the flat type conductor F easily enters the upper wrist. The portions 11, 21 are between the lower wrist portions 12, 22. When the flat conductor F is inserted, the lock fitting 30 is at a position where the lock portion 35 interferes with the flat conductor F as described above, so that the flat conductor F advances while pushing the lock portion 35 with the front end thereof. Since the lock arm 31A is inclined toward the rear upper side before being inserted from the flat type conductor F, when the abutting force from the flat type conductor F is received by the inclined rear edge 35B of the lock portion 35, it is inclined by the upward component force. In the increased direction, the deflection is shifted, and the flat conductor F is easily advanced. When the flat conductor F is advanced to a predetermined position, as shown in Fig. 8(C), the locking portion 35 projects into the engaged portion F2 which is a notch portion of the flat conductor F, so that the leading edge 35A can be opposed to the The front edge of the locked portion F2 is locked status. In this state, the lock wrist 31A is returned to the original inclination. As can be seen from Fig. 8(C), the above-described locking portion 35 projects from above into the engaged portion F2 of the flat type conductor F, and although the flat type conductor F is located with respect to the locking projection 51 of the housing 40 In the front-rear direction, the locked portion F2 is in the state of the locking projection 51, and is locked in a state in which the locking projection 51 is provided at a position different from the locking portion 35 in the terminal arrangement direction.

(4) Next, the movable member 60 is brought to the closed position in the clockwise direction as shown in Fig. 9. In the closed position, the cam portions 63, 64, and 65 of the movable member 60 are in a vertically long posture, and the cam portion 63 pushes up the pressed portion 14 of the terminal 10 upward, and the cam portion 64 faces the pressed portion 24 of the terminal 20. The upper portion is pressed up, and the cam portion 65 presses and raises the pressed portion 34 of the lock fitting 30 upward. When the pressed portions 14, 24, 34 are lifted up, the terminals 10, 20 and the upper wrist portions 11, 21, 31 of the locking fitting 30 respectively use the connecting portions 13, 23, 33 as fulcrums, and the lever principle is used for the connection. The rear portion of the portions 13, 23, and 33 is inclined downward, and the pressing portions 15, 25 at the rear end are displaced downward. The terminals 10 and 20 press the flat conductor F downward by the pressing portions 15 and 25, thereby increasing the contact pressure between the flat conductor F and the contact portions 17 and 27 of the terminals 10 and 20, and are electrically connected to each other. Connection status. On the other hand, the lock fitting 30 allows the lock arm 31A that is inclined toward the rear upper side to be deflected downward toward the lower side so as to reduce the inclination thereof, and becomes a horizontal position. At this horizontal position, the lock portion 35 is displaced downward to be in contact with the lower arm portion 32, and the locking with the locked portion F2 of the flat conductor F is further enhanced. Further, since the flat conductor F is pressed downward by the pressing portions 15 and 25 of the terminals 10 and 20, the locking projection 51 of the casing 40 is allowed to enter the locked state. The state within the F2. The flat conductor F enters the locked portion F2, and the lock portion 35 enters from above, and the locking projection 51 enters from below, and the locking force when the flat conductor F is pulled rearward strongly acts. In this state, that is, in the state where the movable member 60 is in the closed position, the cam portions 63 and 64 are surely maintained in the neutral state in the state of Fig. 7(A), and even if the movable member 60 is slightly rotated in any direction, it can be restored. The original neutral state.

(5) When the flat conductor F is in the officially connected state, when the unintended external force is pulled toward the rear, that is, in the pull-out direction, the leading edge of the locked portion F2 of the flat conductor F will lock the fitting 30. The lock portion 35 is pressed rearward at its front edge 35A. Since the leading edge 35A is vertical, it is firmly engaged with the locked portion F2, and receives a reaction force toward the rear, and pulls the locking arm 31A rearward. However, the lock arm 31A does not tilt in the horizontal direction when the movable member 60 is in the closed position, so that even if the tensile force due to the reaction force is received, the upward force component does not occur, and the lock is maintained. In the horizontal direction, the lock function does not become weak. The front edge 35A may be substantially vertical even if it is not completely vertical.

The present invention is not limited to the types shown in Figs. 1 to 9 and can be variously modified. For example, the projection formed in the casing does not need to be a locking projection, and may be formed in a higher shape than the mounting surface for the flat conductor in the periphery of the locked portion of the flat conductor. In the case of Fig. 10, the housing 40 has a projection 51' which is raised around the lock fitting 30 with respect to the mounting surface 52 when the flat conductor F is inserted. The projection 51' is formed as a locking portion 35 from the lock fitting 30 as can be seen from Figs. 11(A) and (B). The front perimeter extends forward. In this configuration, when the movable member 60 comes to the closed position, the flat conductor F is pressed downward toward the mounting surface 52 in the terminal array range, and the side portion where the locked portion F2 exists is caused by the above-mentioned protrusion The portion 51' is relatively raised and bent in a concave shape in the width direction. That is, the locked portion F2 is lifted up and the lock portion 35 is surely locked.

Next, in the above-described embodiment, the locking arm 31A of the upper arm portion 31 of the locking fitting 30, the movable member 60 is in the open position, and the pressed portion 34 does not receive any force from the movable member 60, and is inclined toward the rear upper side, when the movable member 60 is moved. When the vehicle is brought to the closed position, the pressed portion 34 of the upper arm portion 31 is pressed by the cam portion 65 of the movable member 60, and the lock portion 35 is displaced downward by the posture of the lock arm 31A in the horizontal direction. In the present embodiment shown in the figure, the upper arm portion 31 may be biased from the cam portion 63 in the open position, and the lock arm 31A may be inclined upward and upward, and in the closed position, the force may be released to take a posture in the horizontal direction.

In Fig. 12(A), the movable member 60 has a substantially semicircular cam portion 65 as a pressurizing portion at a lower edge of the operation portion 61 and at a boundary with the groove portion 62. When the movable member 60 shown in FIG. 12(A) is in the open position, the cam portion 65 slides to the pressed portion 34 formed at the upper edge of the front portion of the upper arm portion 31 of the locking fitting 30, The pressed portion 34 is pressed downward. Then, the locking arm 31A, which is the rear portion of the upper arm portion 31, is displaced in a posture inclined upward toward the upper side 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. 12(B), the cam portion 65 is disengaged from the pressed portion 34, and the displacement of the locking arm 31A is released, and the locking arm 31A becomes The posture of the horizontal state.

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 at the lower arm portion, and the pressing portion of the upper arm portion can also serve as a contact portion to come into contact with the conductor portion. It is also possible to mix: a terminal having a contact portion at the lower arm portion and a terminal portion serving as a contact portion at the pressing portion of the upper arm portion, and so-called staggered arrangement.

30‧‧‧Locking accessories

31‧‧‧ upper wrist

32‧‧‧ Lower wrist

33‧‧‧Connecting Department

34‧‧‧Bes pressed

35‧‧‧Locking Department

38‧‧‧Fixed feet

38A‧‧‧Fixed Department

40‧‧‧shell

49‧‧‧Extension

49A‧‧‧Import

49B‧‧‧Import

50‧‧‧Restrictions

51‧‧‧ protrusion (locking protrusion)

51B‧‧‧ trailing edge

51C‧‧‧above

60‧‧‧ movable components

Claims (1)

An electrical connector for a circuit board is an electrical connector that is disposed on a circuit board and electrically connects the inserted flat conductor to the circuit board, and is provided with a flat plate surface that maintains the metal plate and a contact portion that contacts the flat conductor, a connection portion that is connected to the circuit board, a pressing portion that presses the flat conductor, and a pressed portion that receives a force that displaces the pressing portion in the pressing direction are formed on the surface of the board a plurality of terminals arranged in a direction perpendicular to the direction; a locking portion which is formed by maintaining a flat plate surface of the metal plate and locked with the flat conductor, and for accommodating the locking portion, is provided in the same manner as the terminal a pressed portion of the force is disposed as a locking fitting having a plate surface parallel to the terminal; a receiving space for receiving a connecting portion of the inserted flat conductor is formed, and the terminal is held at a position where the contact portion contacts the flat conductor And a housing that holds the locking fitting; and a pressing portion provided with a pressed portion for applying force to the terminal and the locking fitting, which can be inserted a movable member that is opened between a flat conductor and a contact portion that presses the flat conductor toward the terminal, and that moves the lock portion to a closed position of the lock position; the terminal and the lock fitting are formed by a flat conductor The insertion direction is formed by connecting the upper arm portion and the lower arm portion extending in the long axis direction at the intermediate position in the longitudinal direction by the connecting portion, and the terminal portion of the upper arm portion is closer to the front side of the insertion direction of the flat type conductor than the connecting portion. The front has a pressed part, The rear part has a pressing portion, and the upper end of the locking fitting has a pressed portion at the front portion and a protruding locking portion at the rear portion, wherein the locking fitting is at the rear portion of the lower wrist portion and has the above-mentioned locking in the up and down direction a locking projection that protrudes upward with respect to the portion, wherein when the movable member is in the closed position, the locking portion enters from the lower side and the locking projection enters the side edge of the flat conductor from the lower side as the engaged portion. In the notch recess, the lock fitting is engageable with the locked portion in the front-rear direction.