KR20130032881A - Electric connector for circuit substrate - Google Patents

Abstract

PURPOSE: An electronic connector for a circuit board is provided to precisely prevent the separation of a balanced conductor by hanging a lock member with a hanging unit in forward and backward directions. CONSTITUTION: Lower arm portions(12,22) of a lock member(30) face a lock unit(35) in up and down directions and include protrusions which protrude to an upper part. If an operating member(60) is located in a closed position, the lock unit is inserted into a notch depressed portion formed on a side border of a balanced conductor as a hanging unit. The protrusions are inserted into the notch depressed portion from a lower part. The lock member is hung with the hanging unit in forward and backward directions.

Description

ELECTRIC CONNECTOR FOR CIRCUIT SUBSTRATE BACKGROUND OF THE INVENTION [0001]

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

In this type of connector, a balanced conductor such as an FPC is inserted and connected in a state parallel to the surface of the circuit board. In general, the balanced conductor is provided with an ear or hole-shaped caught portion at the side edge thereof, and the lock portion of the lock bracket of the connector is caught by the caught portion to prevent unintentional detachment of the balanced conductor.

In Patent Literature 1, a horizontal H-shaped lock bracket (lock member) having an upper arm portion and a lower arm portion connected by a connecting portion, which is almost the same as a terminal (contact), is formed, and the upper arm portion of the lock bracket is more than the connecting portion. It extends horizontally to the rear side which becomes an insertion side of a flat conductor, and the nail-shaped lock part (engagement part) is formed in the back part. The lock portion has a substantially inverted triangular shape projecting downward toward the flat conductor, and when the connector is used, when the movable member (slider) moves to the closed position where the flat conductor is pressed against the contact portion of the terminal, The upper arm part is lifted by the cam part of the movable member in the front part, the rear part of the upper arm part is inclined downward by the principle of lever, and the lock part is displaced downward. As a result, the locking portion is caught from the upper edge of the caught portion formed as a notch or hole in the balanced conductor inserted between the upper arm portion and the lower arm portion, and prevents the balanced conductor from being inadvertently released. Doing.

Japanese Unexamined Patent Publication No. 2004-221067

In the connector of Patent Literature 1, in order to prevent inadvertent detachment of the balanced conductor, only the lock portion of the lock bracket is caught by the caught portion of the balanced conductor, and further, the lock portion is upwards from the plane of the balanced conductor. That is, it catches on the said caught part from one side. However, the lock part constitutes an approximately inverted triangle. Therefore, even if the balanced conductor has a predetermined contact pressure with the contact portion of the terminal and is in a normal connection state, when the balanced conductor is pulled strongly in the ejection direction, the caught portion of the balanced conductor has the lock portion of the substantially inverted triangle. All bring the force in the ejection direction to the inclined edge. As a result of generating all the components from the inclined edge to the upward, this force causes the rear portion of the upper arm portion of the lock bracket to return upward, thereby reducing the amount of displacement of the rear portion, that is, the lock portion. That is, the lock portion reduces the amount of engagement with the caught portion, or separates, causing a situation of unintentional detachment of the balanced conductor.

In view of the above situation, the present invention relates to a circuit board electrical connector using a lock bracket, in which the lock portion is caught even if an unintentionally strong force acts in the ejection direction of the balanced conductor under a normal connection state of the balanced conductor. It is an object of the present invention to provide an electrical connector for a circuit board which can more reliably realize separation prevention by maintaining a large amount of engagement with the part or reinforcing the caught part so that the locked state does not change.

The electrical connector for a circuit board which concerns on this invention is an electrical connector arrange | positioned on a circuit board and electrically connects the inserted flat conductor with a circuit board, The contact part which is made maintaining the flat plate surface of a metal plate, and contacts a flat conductor, A connecting portion connected to the circuit board, a pressing portion for pressing the balanced conductor, a pressurized portion for receiving a force for displacing the pressing portion in the pressing direction, and a plurality of terminals arranged at right angles to the plate surface; It is made to maintain the flat plate surface of the metal plate like the terminal, and the locking part is locked to the balanced conductor, the pressing member is applied to the force for displacing the lock portion, and the lock bracket is arranged so that the terminal and the plate surface is parallel A receiving space is formed to receive the connecting portion of the inserted balanced conductor and the contact portion is in contact with the balanced conductor. A housing for holding the terminal and for holding the lock bracket, and a pressing portion for applying a force to the pressed portion of the terminal and the lock bracket, are provided with an open position and a balanced conductor for allowing the insertion of a balanced conductor. It has a movable member which can move between the closed position which brings a lock part to a locked position with pressing on, The said terminal and the lock bracket are the middle part of an upper arm part and a lower arm part extended in the longitudinal direction of the insertion direction of a balanced conductor, The terminals are connected to each other by a connecting portion in a position, and the terminal has a pressing portion at the front of the insertion direction of the balanced conductor before the connecting portion and a pressing portion at the rear, and the lock bracket has the pressing portion at the whole and the rear portion It has the locking part of protrusion shape.

In the electrical connector for a circuit board, in the present invention, the lock bracket has a locking protrusion projecting upward from the lower arm portion to the lock portion in an upward direction in the rear direction, and the movable member is closed. In the notched concave formed as a caught portion at the side edge of the balanced conductor, the lock portion enters from above and the catching protrusion from below, so that the lock bracket can be caught in the front-to-back direction with the caught portion. It is characterized by.

In the present invention having such a configuration, when the balanced conductor is inserted to a predetermined position on the mounting surface, the caught portion of the balanced conductor is in the up-down direction, that is, the balanced conductor in the front position with respect to the locking projection formed in the lock bracket held in the housing. Has a overlapping range with the locking projection in the thickness direction. In short, the lock part of the lock fitting plunges into a balanced conductor from upper part, and the locking protrusion of the lock fitting plunges from below.

In this way, the locking portion and the locking projection protrude from the top and bottom with respect to the caught portion, so that even if the balanced conductor shifts in any of the up and down directions, the locking engagement with the lock bracket in the disengaging direction of the shaped conductor is maintained. In addition, since the balanced conductor is pressed downward by the pressing part of the terminal, the deviation is limited to the overlapping range with the locking projection of the lock bracket, and the force against the balanced conductor is accompanied by an upward component to lift the balanced conductor. Even when the locking portion of the locking bracket is driven into the caught portion of the balanced conductor by the force from the pressing portion, the locking engagement with the locking bracket is maintained.

As described above, in the present invention, the lock bracket is locked from the upper and lower portions and the locking projection from the lower portion to the caught portion of the balanced conductor when the movable member is in the closed position. It becomes possible to engage in the front-back direction, and the detachment of a balanced conductor is reliably prevented. In addition, since the balanced conductor is pressed downward by the pressing part of the terminal, the upper arm portion of the lock bracket, in which the lock portion is formed, the caught portion of the balanced conductor is released from the locking projection of the lock bracket, and also from the lock portion of the lock bracket. It is also prevented from generating excessive displacement that is separated, so that the state in which the lock portion and the locking projection enter the upper and lower caught portions from the top and bottom is stably ensured.

BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view which shows a part of the electrical connector for circuit boards of this embodiment, and the balanced conductor inserted in this.
FIG. 2 is a cross-sectional view of the connector before FIG. 1 before the balanced conductor is inserted in the open position, (A) in the terminal arrangement direction, at the position of one of the two types of terminals, (B) (C) is a cross-sectional view at the position of the terminal of the other kind, and (C) at the position of the lock bracket.
3 is a sectional perspective view at a position corresponding to the cross-sectional view of FIG. 2C.
4 is a cross sectional view near the left end at the position of the terminal and the lock bracket for the connector of FIG.
5 is a cross-sectional view at the position of the connecting portion showing a modification to the example of FIG. 4.
FIG. 6 is a longitudinal cross-sectional view at the position of a connecting portion showing another modification to the example of FIG. 4. FIG.
Fig. 7 is a diagram 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 as a modification.
FIG. 8 is a view corresponding to FIG. 2, illustrating the insertion of the balanced conductor in the open position of the movable member; FIG.
FIG. 9 is a view corresponding to FIG. 2, showing when the movable member is in the closed position after insertion of the balanced conductor. FIG.
10 shows another embodiment, and is a partially broken front view when a part of the connector is viewed from the rear.
FIG. 11 is a longitudinal cross-sectional view of the connector of FIG. 10, where (A) is a position of the lock bracket in the terminal arrangement direction, and (B) is a cross-sectional view at a position slightly shifted to the connector side end than the position of (A).
12 is a cross-sectional view at the lock bracket position showing still another embodiment, wherein (A) shows when the movable member is in the open position and (B) is in the closed position.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described based on an accompanying drawing.

FIG. 1: is a perspective view which shows the connection part of the front end of the flat conductor connected to the whole of the electrical connector for circuit boards (hereafter "connector") of this embodiment, and this connector.

The flat conductor F has a sheet-like reinforcing material F1 so that the covering is removed from the lower surface of the distal end portion so that the conductor portion (not shown) is exposed, and the upper surface protrudes toward the connector 1 more forward than the conductor portion. Is equipped. As for the reinforcing material F1, the notch-shaped caught part F2 is formed in the left-right side edge in front of a conductor part.

The connector 1 is a terminal 10 made of a metal plate, a lock bracket 30, a housing 40 holding them, and a movable member 60 supported by the housing 40 so as to be freely rotatable. Have

Both the terminals 10 and 20 and the lock bracket 30 are made to hold the flat surface of the metal plate. The terminals are composed of two kinds of terminals 10; 20, and are arranged so that they are alternately positioned in the direction perpendicular to the plate surface of the terminals 10; 20, and are located at both ends in the same direction. The lock bracket 30 is formed adjacent to it.

As shown in Figs. 2A and 2B, which are cross-sectional views of the respective terminals 10 and 20, the two types of terminals 10 and 20 each form a horizontal H shape, and each extend in the horizontal direction. And upper and lower arm portions 11 and 21, lower arm portions 12 and 22, and connecting portions 13 and 23 which connect both arm portions at their longitudinal middle portions. The upper arm parts 11 and 21 are the to-be-pressed parts 14 and 24 pressed by the cam part of the movable member mentioned later to the whole in the insertion direction front of the balanced conductor F, and the press part which presses a balanced conductor from upper part to the rear part ( 15; 25) are formed. In all of the lower arm portions 12 and 22, support portions 16 and 26 for the cam portion are formed, and contact portions 17 and 27 for contacting the conductor portions of the flat conductor are formed in the rear portion. In the lower arm portions 12 and 22, connection portions 18 and 28 for solder connection with the circuit board are formed.

As mentioned above, although the common point with respect to two types of terminals 10 and 20 was described, the difference is demonstrated next.

As shown in FIG. 2 (A), the upper arm portion 11 of the terminal 10 has a recessed portion formed on the lower edge of the whole, and further extends backward from the connecting portion 13. The protruding pressing portion 15 is formed at its rear end. On the other hand, as shown in FIG. 2 (B), the upper arm portion 21 of the terminal 20 is formed at the straight edges of the pressurized portions 24 formed at the lower edges of the whole. The portion extending backward from the connecting portion 23 is shorter than in the case of the terminal 10, and a protruding pressing portion 25 is formed 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 connection part 18 also has 18 A of groove-shaped fixed parts recessed downward. In the part between the connection part 13 and the connection part 18, the support part 16 which forms a concave shape at the upper edge and accommodates a cam part is formed. In contrast, the lower arm portion 22 of the terminal 20 forms an approximately straight edge at the upper edge of the portion extending forward from the connecting portion 23, as shown in FIG. 2B. The portion extending backward is extended out of the housing 40, and has the connection part 18 of the said terminal 10, the connection part 28 of substantially front-back symmetry, and the fixing part 28A. The lower arm portion 22 of the terminal 20 is a protruding contact portion at a position corresponding to the pressing portion 25 of the upper arm portion 21 at an intermediate portion of the connecting portion 23 and the connecting portion 28 in the front-rear direction. 27 is formed.

The two types of terminals 10 and 20 thus formed are alternately arranged with the terminals 10 mounted from the front and the terminals 20 mounted from the rear, as shown in FIG. 1.

As shown in FIG. 2 (C) and FIG. 3, the locking bracket 30 has a horizontal H shape similar to that of the terminal 20, and the ivory arm portion 31 and the lower arm portion are similar to the terminal 20. It has 32, and both are connected by the connection part 33 in the longitudinal middle part. In all of these lock brackets 30, the upper arm part 31 and the lower arm part 32 also have the same form as the terminal 20, and all of the upper arm parts 31 are directly pressurized at the edges. The support part 36 of the substantially straight edge is formed in 34 and all of the lower arm parts 32. As shown in FIG. There is a point that the rear part of the locking bracket 30 differs from the terminal 20 in form. The rear part of the upper arm part 31 is longer than the terminal 20 by the length, and forms the lock arm 31A which is substantially the same position as the terminal 10, and extends back. And the lock part 35 of the comparatively large protrusion shape facing downward is formed in the rear end. The lock arm 31A extends inclined upward toward the rear side. When the lock arm 31A is pressed by the cam portion of the movable member in the closed position described later, the lock arm 31A is lifted upward and displaced, the connecting portion 33 is supported by the principle of the lever. Displaced downward, and as a result, it is in a substantially horizontal position. In this case, even if the lock arm 31A is not a complete horizontal position, and even some inclination remains, it should just be in the attitude which can be called a substantially horizontal state. For example, the lock arm having the inclination when the movable member is in the open position is designed to reduce the inclination angle to become close to the horizontal position when the movable member is in the closed position, but a slight inclination remains or the horizontal position. Even if a slight inclination is generated on the other side beyond the above, it can be said to be a substantially horizontal position when the inclination is small. As for the projection-shaped lock part 35 formed in the rear end of the said lock arm 31A, the edge 35A has a substantially vertical edge at all, and the rear edge 35B is inclined forward toward downward. The lock portion 35 is formed with the front edge of the balanced conductor F when the balanced conductor F is inserted in the state where the upper arm portion 31 is not subjected to a force from the cam portion at the to-be-pressed portion 34. It interferes with the positional relationship in the height direction. Moreover, the fixing leg 38 of the same form as the connection part 28 of the terminal 20 is formed in the rear end of the said lower arm part 32, and the groove shaped fixing part 38A is formed there.

The housing 10 holding the above-mentioned terminals 10 and 20 and the lock bracket 30 is made of an electrical insulating material, and as shown in FIG. 1, has a relatively flat substantially rectangular parallelepiped shape, and FIG. Similarly, terminal retaining grooves 41 and 42 and lock bracket retaining grooves 43 are formed to penetrate back and forth (right and left in the drawing) to hold the terminals 10 and 20 and the lock bracket 30, respectively. These terminal holding grooves 41 and 42 and the lock bracket holding groove 43 are such that the plate-shaped terminals 10 and 20 and the lock bracket 30 are faced and held while maintaining a slight gap with these plate surfaces. It is formed as a slit of the groove width corresponded to the plate | board thickness in the direction orthogonal to the surface at 2nd. For these terminal retaining grooves 41; 42 and the lock bracket retaining groove 43, the terminals 10; 20 and the lock bracket 30 are formed with projections 19; 29 and projections 39 formed at their lower edges. By hanging on the bottom of the groove, it is held firmly at the upper and lower edges. In addition, these terminal holding grooves 41; 42 and the lock bracket holding grooves 43 communicate with all of the spaces 44 notched largely upward in all of the housings 40, and are also intermediate positions in the front-rear direction. It is communicated by the insertion groove 45 as an accommodation space for the balanced conductor F formed toward the rear from the back. By the formation of the insertion groove 45, the housing 40 has an upper wall 46 and a lower wall 47 at its upper and lower positions, and a terminal holding groove (on the surface of the upper wall 46 and the lower wall 47). 41; 42) It takes the form of this opening groove. The upper wall 46 is formed at the position of the lock bracket 30 so that the groove 48 through which the lock arm 31A of the lock bracket 30 enters penetrates up and down to have a slit shape. The lower wall 47 forms a holding part 47A in which the front end is thinly formed in a substantially tapered shape and the groove-shaped fixing part 18A of the terminal 10 is fitted into the terminal 10. ) And the locking bracket 30 constitutes a holding portion 47A for each of the fixing portions 28A and 38A of the terminal 20 and the locking bracket 30, which are formed at the rear end in the same manner. In addition, the terminal holding groove 41 for the terminal 10 opened upward from the lower wall 47 has its groove bottom () so as to allow the rear portion of the lower arm portion 12 of the terminal 10 to be bent downward. 41A) is formed in a tapered shape toward the rear, and the groove depth is gradually increased.

As can be seen from FIG. 1, the housing 40 extends rearward from the rear end edge in the range between the lock brackets 30 at both ends, including the terminal arrangement range, at both ends in the terminal arrangement direction. Extended portion 49 is formed. As shown in FIG. 2, this extension part 49 has a horizontal U shape in the shape seen from the back, and the width direction both edges of the balanced conductor F (the caught part F2 exists in the width direction). Width | variety both ends of the insertion groove 45 are formed so that it may accommodate from the back side. This extension part 49 has the introduction surface 49A; 49B of a taper up and down in the inlet part in the back. The inner surface and the upper and lower inner surfaces of the insertion groove 45 in the extension portion 49 form a restricting portion 50 for regulating the position of the flat conductor F to be inserted in its width direction and in the vertical direction. do. Moreover, the locking protrusion 51 as a protrusion part which catches the caught part F2 of the balanced conductor F is formed in the lower surface which is the same level as the mounting surface at the time of insertion of a balanced conductor among these control parts 50, have. As can be seen from FIG. 1, the locking projection 51 is located at a position shifted from the lock bracket 30 in the terminal arrangement direction, and as can be seen from FIG. 2 (C) in the front-rear direction, It is formed in substantially the same position as the lock portion 35 of the lock bracket 30. The engaging projection 51 has a trapezoidal longitudinal section, and the edge 51A has a vertical surface and the rear edge 51B has a tapered surface. The upper surface 51C of the locking projection 51 is a flat surface and is located below the lower end of the lock portion 35, as shown in Fig. 2C showing when the movable member is in the open position. When the lock part 35 is displaced downward by coming to the closed position, the height is set so that it may be located above the lower end of this lock part 35. In addition, 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 the lower arm portions 12 and 22 of the terminals 10 and 20. It is located below the upper end of the contact part 17;

As described above, in the present invention, when the movable member is in the closed position, the lock portion 35 and the locking projection 51 are caught by being complemented from above and below with respect to the caught portion F2 of the flat conductor. 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 located above the lower end of the lock portion 35, and the lock portion ( It may be located below the lower end of 35), and still obtains the effect by the above complement. In addition, in this invention, although the locking projection is not formed from the housing, it may be formed in the other member hold | maintained by the housing, for example, the reinforcement bracket, Furthermore, the lock part is provided in the bracket itself which has a lock arm part. It may be formed so as to face.

As described above, the terminals 10 and 20 and the lock bracket 30 are reliably held at the bottom of the grooves of the terminal retaining grooves 41 and 42 and the lock bracket retaining grooves 43 for them, and the groove inner surface Some gaps are formed between the terminals 10 and 20, and the gaps between the terminals 10 and 20 and the plate surface of the lock brackets 30 are formed at the portions of the terminals 10 and 20 and the lock brackets 30. Therefore, there is a difference in size, that is, there is a wide and narrow groove width.

As shown in FIG. 4 showing a cross section at the height at which the connecting portions 13; 23 and 33 are located, the terminal retaining grooves 41; 42 in each area including the connecting portions 13; 23 and 33. The groove width of the lock bracket retaining groove 43 is larger than the groove width in the other region, and forms the light-emitting portions 41A; 42A; 43A. In the area | region of the light exposure part 41A; 42A; 43A, the clearance gap (hl; h2; h3) wider than another area | region is formed between the terminal 10; 20 and the plate surface of the lock bracket 30, respectively. . In this embodiment, h1 = h2. The light-expansion parts 41A and 42A with respect to these terminals 10 and 20 alternately arrange | positioned in the terminal arrangement direction are shifted in the front-back direction (up-down direction in FIG. 4). In addition, in this FIG. 4, it can be seen that the above-mentioned locking projection 51 is positioned to shift from the locking bracket 30 in the terminal arrangement direction, and is close to the locking bracket 30. In the example of FIG. 4 described above, since the connecting portions 13 and 23 of the terminals 10 and 20 are formed at different positions in the front-back direction, the light-emitting portion in the region corresponding to the connecting portions 13 and 23 in the front-back direction. Only by forming 41A; 42A, the light-exposure parts 41A; 42A are also shifted in the front-back direction. On the other hand, when the connecting parts 13 and 23 of the terminals 10 and 20 are in the same position in the front-back direction as shown in FIG. 5, the light-exposure portions 41A and 42A are shifted back and forth through the tapered parts. You may form so that it may transition to the light-exposure part 41A; 42A. Furthermore, since the connecting parts 13 and 23 have the length in the vertical direction corresponding to the space | interval of both arm parts as the form which connects the upper arm parts 11 and 21 and the lower arm parts 12 and 22, the connecting part ( Even when 13 and 23 are at the same position in the front-rear direction, as shown in FIG. 6, the light-emitting portions 41A and 42A are formed at different positions in the vertical direction, so that the large intervals h1 and h2 are shifted up and down. You may form.

As shown in FIG. 1, the connector 1 is formed so that the movable member 60 made of an electrical insulating material can freely rotate. The movable member 60 is located in all the spaces 44 formed in all of the housings 40. The movable member 60 extends over the width (dimensions in the terminal arrangement direction) of the housing 40, and has a posture to establish as shown in FIGS. 2A to 2C. It is possible to rotate freely from the open position to the closed position of FIGS. 9 (A) to (C) falling in the horizontal direction. The movable member 60 imparts a downward displacement to the rear portions of the terminals 10; 20 and the upper arm portions 11; 21 and 31 of the lock bracket 30, and the open position column causes the displacement to occur. It is the position of the movable member 60 which enables the flat conductor F to be inserted into the insertion groove 45 of the housing 40 beforehand. Meanwhile, the closed position generates the displacement to lower the flat conductor F after the insertion. Press position.

The said movable member 60 has the operation part 61 which protrudes from the upper part in the space 44 as shown in FIGS. The slit-shaped groove part 62 which penetrates back and forth is formed. The groove portion 62 is formed at a position corresponding to each terminal 10; 20 and the lock bracket 30 in the terminal arrangement direction, and the groove width of the groove portion 62 (FIGS. 2A to 2C). ), The groove width dimension in the direction perpendicular to the ground) is slightly larger than the plate thickness of the corresponding terminals 10 and 20 and the lock bracket 30. In the lower part of the groove part 62, the cam part 63; 64; 65 corresponding to each terminal 10; 20 and the lock bracket 30 is provided as a pressing part for the terminal 10; 20 and the lock bracket 30. Formed. Each cam part 63 (64; 65) is formed so that the groove | channel inner surface of the groove part 62 which opposes may be connected.

As shown in FIG. 2A, the cam portion 63 formed corresponding to the terminal 10 has an elliptical cross-sectional shape that forms a horizontal length when the movable member 60 is in the open position. It is in the recessed support part 16 formed in the upper edge part of the lower arm part 12 of 10), and it has a space | interval with respect to the to-be-pressed part 14 of the upper arm part 11, and is in a non-contact state. The horizontal length of this cam part 63 in FIG.2 (A) is set larger than the space | interval of the said support part 16 and the to-be-pressed part 14 in the same figure. Therefore, when the movable member 60 has come to the closed position, as described later, the cam portion 63 takes a vertically long posture, and pushes the pressure portion 14 upward to elastically displace it.

The cam portion 64 formed corresponding to the terminal 20 has a horizontally elliptical cam portion for the terminal 10 when the movable member 60 is in the open position, as shown in Fig. 2B. It has a cross-sectional shape which deform | transformed the upper right corner part of 63 into each shape, and contact | connects the said support part 26. Moreover, the height dimension in the same figure is also larger than the said cam part 63. FIG. Accordingly, the cam portion 64 has a semicircular shape at the left side and a flat surface at the bottom thereof, and has a rounded shape at the bottom thereof. When the cam part 64 is also in the open position, the cam part 64 is in a non-contact state with a gap with respect to the to-be-pressed part 24 formed in the upper arm part 21 of the terminal 20, and the movable member 60 ) Is in a longitudinally long position when the closed position is brought into position, and the to-be-pressed part 24 is pushed upward to elastically displace.

The cam portion 65 formed in correspondence with the lock bracket 30 has a cross-sectional shape similar to that of the cam portion 64, but even when the movable member 60 is in the open position, the cam portion 65 is provided with the upper arm portion 31 of the lock bracket 30. It is in contact with the formed to-be-pressed part 34. When the movable member 60 is in the closed position, the cam portion 65 depresses the pressure portion 34 to elastically displace it.

The cam portions 63 and 64 respectively corresponding to the two types of terminals 10 and 20 are perpendicular to the ground in the direction of their rotation axis, that is, when the movable member 60 is in the closed position, that is, in FIG. When viewed from the direction, it is in the positional relationship as shown in Fig. 7A. In FIG. 7 (A), when the movable member 60 is in the closed position, the cam portion 63 and the cam portion 64 that are in the longitudinally long posture are the pressed portion 14 and the support portion of the terminal 10. Reaction forces (A, B) of the same force are respectively received from (16) and reaction forces (C, D) of the same force are respectively received from the to-be-pressed part 24 and the support part 26 of the terminal 20, respectively. The reaction forces A, B for one cam portion 63 are on one line X passing through the center of rotation P of the cams because their lines of action coincide. On the other hand, in the other cam part 64, the width is wider than the cam part 63, and the circular arc of the upper end is shifted to the right side, and the reaction force C from the to-be-pressed part 24 is transmitted to the said cam part 63 It is located on the right side of the reaction force A in addition, and since the reaction force from the support portion 26 acts on the flat bottom face of the cam portion 64, the center of the reaction force D becomes its center position, and eventually the reaction force ( It has a line of action on the same line (Y) as in C). That is, when the cam portions 63; 64 are viewed simultaneously, reaction forces A and B are balanced on one line X, and reaction forces C and D are balanced on another line Y away from the line X. FIG. Therefore, on both sides of the cam portions 63 and 64, reaction forces A and B that are balanced in the up and down directions and C and D that are equally balanced in the up and down directions are received at positions away from the rotational center P of the cam, The movable member 60 in the closed position takes a neutral state in the closed position. Even if the movable member 60 tries to shift in the opening position direction or its reverse direction from this neutral state, it is originally made by the moment by the reaction force (A, B and C, D) on the said two wires (X, Y). The neutral state is returned to maintain a neutral state stably.

Such a neutral state is obtained even if the positional relationship of reaction force (B, D) with respect to reaction force (A, C) of two types of cam parts (63; 64) is reversed. In FIG. 7B, when both the cam portions are formed such that the long axes of the two kinds of cam portions 63 and 64 intersect when the movable member is in the closed position, reaction forces A and B of one cam portion 63 are formed. The lines of action of deviate from each other, and the lines of action of reaction forces C and D of the other cam portion 64 also deviate from each other. However, when looking at the two types of cam portions 63 and 64 at the same time, the four reaction forces A, B, C, and D have only been replaced by the positions of the reaction forces B and D as compared with the case of Fig. 7A. In general, the balance is the same as in FIG. 7 (B). Therefore, even in this case, the neutral state is stabilized.

Next, the usage method of the electrical connector for circuit boards of this embodiment comprised in this way is demonstrated.

(1) First, the connector 1 shown in FIG. 1 is arrange | positioned in the predetermined position of a circuit board (not shown), and the fixed leg of the connection part 18; 28 of the terminal 10; 20, and the lock bracket 30 ( 38) are solder-connected with each corresponding part of a circuit board. Solder is likely to rise along the respective plates of the terminals 10 and 20 and the lock bracket 30 from the connecting portions 18 and 28 and the fixing legs 38 formed on the lower arm portions 12; 22 and 32. have. However, since the lower arm portions 12; 22; 32 of the terminals 10; 20 and the lock bracket 30 are connected to the upper arm portions 11; 21; 31 only by the connecting portions 13; 23; 33. Even if the solder rises, 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 shown in Figs. 4 to 6, for the connecting portions 13; 23 and 33, the housing 40 forms a large gap in the light emitting portions 41A; 42A; 43A, so that the solder rise is stopped here. The upper arm portions 11, 21, and 31 do not reach. The effect of the solder rise prevention is similarly obtained for the freck.

* (2) Next, as shown to FIG. 2 (A)-(C), it brings to the open position which sets the movable member 60, and prepares for insertion of the balanced conductor F. As shown to FIG. In the state where the movable member 60 is in the open position, the terminals 10 and 20 and the pressurized portions 14: 24 and 34 of the lock bracket 30 are the corresponding cam portions 63 and 64 of the movable member 60; Without receiving any force from 65, the pressing portions 15: 25; 35 are thus in the original position, which is not displaced, and the terminals 10; 20 can easily accommodate the balanced conductors F. Is in a state. Here, as already mentioned, the locking fitting 30 is in the position which the press part 35 interferes with the insertion path of the balanced conductor F. As shown in FIG.

(3) Then, as shown to FIG. 8 (A)-(C), the balanced conductor F is inserted in the insertion groove 45 of the housing 40. FIG. At that time, the balanced conductor F is formed by the restricting portion 50 of the extension portion 49 formed in the housing 40 extending rearward before contacting the terminals 10; The position is regulated and inserted at the predetermined position. Therefore, at the time of insertion, the terminals 10 and 20 do not receive excessive force from the balanced conductor F. At the time of insertion of the balanced conductor F, as described above, the movable member 60 is in the open position, and the pressing portions 15 and 25 of the terminals 10 and 20 have not yet been displaced downward. For the terminals 10 and 20, the balanced conductor F enters between the upper arm portions 11 and 21 and the lower arm portions 12 and 22 without difficulty. When the balanced conductor F is inserted, the lock bracket 30 is positioned at the position where the lock part 35 interferes with the balanced conductor F as described above, so that the balanced conductor F has its front end. Move the lock part 35 upward. Since the lock arm 31A is inclined upward toward the rear from before the insertion of the balanced conductor F, when the contact force from the balanced conductor F is received at the inclined rear edge 35B of the lock portion 35, the lock arm 31A is inclined upward. , It is bent and displaced in the direction of increasing the inclination by the component force on the upper side, thereby facilitating the advancement of the balanced conductor (F). When the balanced conductor F advances to a predetermined position, as shown in Fig. 8C, the lock portion 35 enters into the caught portion F2, which is the notched portion of the balanced conductor F, and the edge portion 35A is entirely at the edge 35A. It becomes a state which can be caught with respect to all the edges of the to-be-engaged part F2. In this state, the lock arm 31A returns to the original inclination. As can be seen from FIG. 8 (C), while the lock portion 35 has entered the caught portion F2 of the balanced conductor F from above, the balanced conductor F has a housing ( Although it is located above the locking projection 51 of 40, in the front-back direction, the said caught part F2 is in the position of the locking projection 51, and is located in a position different from the lock part 35 in the terminal arrangement direction. It is in the state which can be caught with this latching process | protrusion 51 formed.

(4) Next, the movable member 60 is brought to the closed position in the clockwise direction as shown in FIG. 9. In this closed position, the cam portions 63 (64; 65) of the movable member 60 are in a longitudinally long posture, so that the cam portion 63 makes the to-be-pressed portion 14 of the terminal 10 and the cam portion 64 a terminal. The to-be-pressed part 24 of the 20, and the cam part 65 push up the to-be-pressed part 34 of the lock bracket 30, respectively, upwards. When the to-be-pressed part 14; 24; 34 is lifted up, the upper arm part 11; 21; 31 of the terminal 10; 20 and the lock bracket 30 are respectively supported by the connection part 13; 23; 33 as a supporting point. According to the principle of the lever, the rear portion is inclined downward from the connecting portions 13; 23; 33, and the pressing portions 15; 25 at the rear end are displaced downward. In this way, the terminal 10; 20 presses the balanced conductor F downward by the pressing portions 15; 25, and the contact portions 17 and 27 of the balanced conductor F and the terminals 10; 20. The contact pressure with is increased to ensure electrical connection, thereby obtaining a normal connection state. On the other hand, the lock arm 30 is bent downward and displaced so that the lock arm 31A which was inclined upward toward the rear side may reduce this inclination and take a horizontal position. In this horizontal position, the lock part 35 is displaced downward until it comes in contact with the lower arm part 32, thereby making the locking part F2 of the said flat conductor F stronger. In addition, since the balanced conductor F is pushed downward by the pressing parts 15 and 25 of the terminals 10 and 20, the locking projection 51 of the housing 40 is caught in the caught part F2. Enters the state entered. In this way, as for the balanced conductor F, the locking part 35 entered from the upper part and the locking protrusion 51 from the lower side into the caught part F2, and the balanced conductor F was pulled back. The grip of time is strong and sure. In this state, that is, the state where the movable member 60 is in the closed position, the cam portions 63 and 64 are in the state of FIG. Even if it rotates in a direction, it returns to an original neutral state.

(5) In this way, if the balanced conductor F is pulled in the rear, that is, in the dispensing direction by an unintentional external force when the balanced conductor F is in the normal connection state, the caught portion F2 of the balanced conductor F The entire edge pushes the lock portion 35 of the lock bracket 30 back from the entire edge 35. Since all of these edges 35A are vertical, they are secured to each other with the caught portion reliably, and are subjected to the reaction force to the rear, and the lock arm 31A is pulled backward. However, since the lock arm 31A faces the horizontal direction when the movable member 60 is in the closed position and is not inclined with respect to the horizontal direction, the lock arm 31A generates a component force upward even when subjected to the tension force by the reaction force. This posture in the horizontal direction is maintained without causing the lock function to deteriorate. In addition, even if the said all edge 35A is not completely vertical, even if it is inclined slightly up and down, it is sufficient if it is substantially vertical.

This invention is not limited to the form shown in FIGS. 1-9, A various change is possible. For example, the projection formed in the housing does not need to be a locking projection, and may be formed to be formed higher than the mounting surface for the balanced conductor around the caught portion of the balanced conductor. In the case of FIG. 10, the housing 40 is provided with a protrusion 51 ′ that is raised around the lock bracket 30 with respect to the mounting surface 52 at the time of insertion of the balanced conductor F. As shown in FIG. As can be seen from FIGS. 11A and 11B, the protrusion 51 ′ extends forward from the front periphery of the lock portion 35 of the lock bracket 30. In this form, when the movable member 60 is in the closed position, the balanced conductor F is pushed downward toward the mounting surface 52 in the terminal arrangement range, and on the side where the caught portion F2 is present. The projections 51 'are relatively lifted up and concave in the width direction. In other words, the caught portion F2 is lifted upward and securely engaged with the lock portion 35.

Next, in the above-mentioned embodiment, the lock arm 31A of the upper arm part 31 of the lock bracket 30 is moved from the movable member 60 to the to-be-pressed part 34 by the movable member 60 in the open position. It is inclined upward toward the rear without any force and when the movable member 60 is in the closed position, the pressure portion 34 of the upper arm portion 31 is pressed against the cam portion 65 of the movable member 60. Although the lock part 35 is displaced downward by the lock arm 31A posing in the horizontal direction, in the present embodiment shown in FIG. 12, the upper arm part 31 is forced from the cam part 63 in the open position. In response, the lock arm 31A may be inclined upward toward the rear, and the force may be released in the closed position so that the lock arm 31A is in a horizontal position.

In FIG. 12 (A), the movable member 60 has the cam part 65 of substantially semi-circular shape as a press part in the part which forms the boundary with the groove part 62 in the lower edge of the operation part 61. In FIG. When the movable member 60 shown in FIG. 12 (A) is in the open position, the cam portion 65 is connected to the blood pressure portion 34 formed at the upper edge of all the upper arm portions 31 of the lock bracket 30. It is mounted and presses the to-be-pressed part 34 downward. Therefore, the lock arm 31A, which is the rear portion of the upper arm portion 31, is displaced so as to take a posture inclined upward toward the rear with the connecting portion 33 as a supporting point. Moreover, when the movable member 60 rotates around the shaft part 66 and comes to the closed position shown in FIG. 12 (B), the cam part 65 is separated from the to-be-pressed part 34 to lock arm 31A. Is released, the lock arm 31A is in a horizontal position.

In the present invention, when the conductor portion is formed on the upper surface of the balanced conductor, the terminal does not have to have a contact portion in the lower arm portion, and the pressing portion of the upper arm portion also serves as the contact portion so as to contact the conductor portion. You may. Furthermore, the terminal which has a contact part in a lower arm part, and the terminal which the press part of an upper arm part also serves as a contact part can be mixed, and it can also be set as what is called a zigzag arrangement.

10; 20: terminal 34: pressure part
11; 21: ivory arm part 35: lock part
12; 22: lower arm 40: housing
13; 23: connecting portion 45: receiving space (insertion groove)
14; 24: blood pressure part 49: extension part
15; 25: pressing unit 50: regulatory unit
17; 27: contact part 51: protrusion part (locking protrusion)
18; 28: connection part 60: movable member
30: lock bracket 63; 64: cam part
31: ivory arm part F: balanced conductor
32: lower arm part F2: caught part
33: Connection

Claims (1)

An electrical connector disposed on a circuit board and electrically connecting the inserted flat conductor to the circuit board, the electrical connector being made to maintain a flat plate surface of the metal plate and making contact with the flat conductor, the connecting portion connected to the circuit board, and the flat conductor being pressed. A press part, a press part which receives a force for displacing the press part in the press direction, is formed, and a plurality of terminals arranged at right angles to the plate surface and the flat plate surface of the metal plate are made in the same manner as the terminals, and the flat conductor A lock portion engaged with the lock portion, a to-be-pressed portion for displacing the lock portion is formed, a lock bracket arranged to be parallel to the terminal and a plate surface, and a receiving space for receiving the connection portion of the inserted flat conductor is formed To hold the terminal in a position where the contact is in contact with the balanced conductor and to hold the lock bracket. A pressing portion for applying a force to the to-be-pressed portion of the terminal and the locking bracket is formed, and the lock position is brought into the locked position by pressing the open position and the balanced conductor to the contact portion of the terminal to enable the insertion of the balanced conductor. The terminal and the lock bracket have movable members movable between the closed positions, and the upper arm portion and the lower arm portion, which extend with the insertion direction of the balanced conductor in the longitudinal direction, are formed connected by connecting portions at their longitudinal intermediate positions, and the terminals The ivory arm has a pressurized part in the front part in the front of the insertion direction of the balanced conductor and a pressurized part in the rear part of the balanced conductor, and the lock bracket has a projection part in the pressurized part and the rear part in the pressurized part. In the electrical connector for a circuit board which has a lock part,
The locking bracket has a locking projection projecting upwardly with the lower arm portion opposed to the lock portion at the rear portion thereof, and when the movable member is in the closed position, it is a caught portion on the side edge of the balanced conductor. And the locking portion is projected from above and the locking projection from below, so that the locking bracket can be engaged in the front-to-back direction with the caught portion.

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