KR20110098643A - Electric connector for circuit substrate - Google Patents

Abstract

(assignment )
In soldering a terminal to a circuit board, a problem is to provide an electrical connector for a circuit board that prevents solder wicks in the terminal.
(Solution)
A housing 40 having a holding groove 41; 42 held on a plate surface of the terminal 10; 20, and a pressing portion 63; 64 for applying a force to the pressurized portion 14; 24 of the terminal, And a movable member 60 movable between an open position for closing the flat conductor and a closed position for pressing the terminal, the terminal extending in the direction of insertion of the flat conductor and the lower arm portion 11; 12 and the lower arm portion 12. 22 is connected by connecting portions 13 and 23 at an intermediate position, and the upper arm portion has a pressing portion 14; 24 on the whole of the balanced conductor rather than the connecting portion and a pressing portion 15; 25 on the rear portion; The retaining grooves 41 and 42 form the light-expanding portions 41A and 42A in which a portion of the range including a portion of the connection portion of the terminal has a groove width wider than the other portions, and the light-emitting portions are at least partially positioned differently.

Description

ELECTRIC CONNECTOR FOR CIRCUIT SUBSTRATE}

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

In this type of connector, since the number of terminals arranged is large, it is required to be arranged at a very small pitch. Therefore, the terminals are made while maintaining a flat plate surface of a metal plate, and are arranged in a direction perpendicular to the plate surface, whereby the minimum pitch Enables array of.

As such a connector, the connector disclosed by patent document 1 is known. As for the connector of this patent document 1, the terminal made by holding the flat plate surface as mentioned above is used by the two types of a 1st terminal and a 2nd terminal, and is arrange | positioned alternately so that a plate surface may become mutually parallel. The first terminal holding recess and the second terminal holding recess of the housing holding the first terminal and the second terminal are in contact with the plate surface of the first terminal and the second terminal on each terminal holding wall. Moreover, in patent document 1, the terminal holding wall is provided with the light-emitting part or notch part which forms a clearance gap with the plate surface of a terminal partially. The light emitting portion or notched portion does not describe how the positional relationship between the first terminal and the second terminal when viewed from the terminal arrangement direction is described, but as can be seen from the drawings, the position with respect to the first terminal and the second terminal are not described. The positions for the terminals are the same.

By forming a portion that forms a gap between the terminal holding wall and the plate surface of the terminal in such a light portion or notch, even if the flux rises along the plate surface of the terminal during soldering, the gap in the light portion or notch portion This prevents further increase of the flux and prevents the flux from reaching the contact portion (contact) formed on the upper part of the terminal.

Japanese Unexamined Patent Publication No. 2007-287398

In the connector of this patent document 1, although the 1st terminal and the 2nd terminal are arrange | positioned alternately, the light-exposure part or notch part which forms a clearance gap in order to prevent a flux rise is located in the same position when it sees from a terminal arrangement direction. Formed. Therefore, when the terminals are to be arranged at the minimum pitch, the thickness of the terminal holding wall between adjacent terminals becomes thinner by the gap, so that the holding strength is lowered. However, in order to secure the holding strength, the wall thickness must be made larger than the gap, so that a very small pitch arrangement cannot be realized.

SUMMARY OF THE INVENTION In view of the above situation, the present invention provides a circuit board electrical connector capable of arranging terminals at a minimum pitch even if a gap for preventing flux rise is formed without reducing the terminal holding strength caused by the housing. do.

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, and a pressing portion for receiving a force for displacing the pressing portion in the pressing direction, the plurality of terminals arranged at right angles to the plate surface; A housing having an import space for receiving the connection portion of the inserted flat conductor and a holding groove for holding the terminal on the plate surface of the terminal at a position where the contact portion contacts the balanced conductor; Pressing part is formed to apply force to the pressure part, so that the contact position of the terminal with the open position and the balanced conductor enabling the insertion of the balanced conductor Having a movable member movable between closed positions pressed against the terminal, wherein the terminal is formed by connecting an ivory arm portion and a lower arm portion extending in the longitudinal direction of the parallel conductor by a connecting portion at their longitudinal intermediate positions, and the ivory arm portion Has a pressed part in the whole of the insertion direction front side of a balanced conductor rather than a connection part, and a pressed part in a rear part.

In such a circuit board electrical connector, in the present invention, the holding groove forms a light-emitting portion having a groove width wider than the other portion at least in a part including a portion of the connection portion of the terminal, and the light-emitting portion is viewed from the terminal arrangement direction. At least one part is characterized by being located differently at the time.

In the present invention having such a configuration, the light emitting portion is formed at the position of the connecting portion in forming a light emitting portion for each terminal in the holding groove holding the terminal and preventing the flux from rising due to the gap in the light emitting portion. Flux rise is effectively prevented at the connecting portion, which can be the only ascending path of flux rise from the lower arm portion having the soldered connection portion to the upper arm portion having the contact portion. In addition, in the adjacent terminals, the light-emitting portions are shifted from each other when viewed in the terminal arrangement direction, thereby securing a wall surface for retaining the terminal in a portion where the light-emitting portion is not formed by the misalignment while forming a gap in the light-expanded portions. Since the holding strength can be secured, the wall thickness between the holding grooves can be made thin to enable the arrangement of the minimum pitch of the terminals.

In the present invention, the light-emitting portions with respect to the adjacent terminals may be at least partially positioned differently in the front-back direction, or at least a portion may be differently positioned in the vertical direction.

As described above, the present invention forms a gap by forming a light-emitting portion at least in a range including the first portion of the connecting portion of the terminal, and at least a portion thereof is formed when the light-emitting portions for adjacent terminals are viewed from the terminal arrangement direction. Since different positions are provided, gaps are formed on both sides of the terminal, and in the terminal arrangement direction, there is no case where the portion held in contact with both sides of the terminal is no longer present, thereby effectively preventing the flux rise prevention at the connecting portion. In addition, the minimum pitch arrangement of the terminals is possible without degrading the terminal holding strength.

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 of FIG. 1 before the balanced conductor is inserted in the position where the movable member is opened, (A) in the terminal arrangement direction, at the position of one of two terminals, (B) Is a cross section at the position of the terminal of a different kind, and (C) is a 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 after the movable member is in the open position. 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 section of the connector of Fig. 10, wherein (A) is a cross-sectional view at a position where the lock bracket is shifted in the terminal arrangement direction, and (B) is 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 formed. 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 has a terminal 10 made of a metal plate, a lock bracket 30, a housing 40 holding them, and a movable member 60 supported so as to be freely rotatable in the housing 40. 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 the upper and lower arm portions 11 and 21, the lower arm portions 12 and 22, and the connecting portions 13 and 23 connecting both arm portions at their longitudinal middle portions. The upper arm parts 11 and 21 are 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 in the back part. (15; 25) is 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, 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 the rear end thereof. On the other hand, as shown in FIG. 2 (B), the upper arm portion 21 of the terminal 20 is provided with the to-be-pressed portion 24 formed at the lower edge of the whole, and is formed at the straight edge. 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 in which the upper edge becomes concave shape and accommodates a cam part is formed. On the other hand, the lower arm portion 22 of the terminal 20 forms an edge immediately above the upper edge of the portion extending forward from the connecting portion 23, as shown in FIG. 2 (B), and the supporting portion 26 is formed. The portion extending rearward extends out of the housing 40, and has a connecting portion 18 of the terminal 10, a connecting portion 28 and a fixing portion 28A of approximately front-back symmetry. 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.

As shown in FIG. 1, the two types of terminals 10 and 20 thus formed are alternately arranged with the terminal 10 mounted on the housing 40 from the front and the terminal 20 mounted from the rear.

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 upper arm portion 31 and the lower arm portion ( 32, both of which are connected by a connecting portion 33 at the longitudinal middle portion thereof. 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. The rear part of the locking bracket 30 may have a different shape from the terminal 20. The rear part of the upper arm part 31 is longer than the terminal 20 as a length, and is substantially the same position as the terminal 10, and forms the lock arm 31A extended rearward. 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 a point by the principle of lever. It is displaced downward, and as a result is in a substantially horizontal position. In this case, even if the lock arm 31A is not a perfect horizontal position, and even some inclination remains, it is only necessary that the lock arm 31A be in a posture that can be said to be substantially horizontal. For example, a lock arm having an inclination when the movable member is in the open position is intended to reduce its inclination angle to become close to the horizontal position when the movable member is in the closed position, but some inclination remains or is horizontal Even if a slight inclination is generated beyond the position to the opposite side, 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 almost a vertical magnetic field, 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 is in the positional relationship in the height direction which interferes. 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 and substantially rectangular parallelepiped shape, and is shown in FIGS. Similarly, terminal retaining grooves 41 and 42 and lock bracket retaining grooves 43 are formed to penetrate back and forth (right and left directions 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 grooves 43 hold the plate-shaped terminals 10 and 20 and the lock bracket 30 face to face while maintaining a slight gap therebetween, In FIG. 2, it is formed as a slit of the groove width corresponding to the plate | board thickness in the direction orthogonal to the surface. With respect to such terminal retaining grooves 41 and 42 and the lock bracket retaining groove 43, the terminals 10 and 20 and the lock bracket 30 are formed with projections 19 and 29 and projections 39 formed at their lower edges. By this, it hangs on the groove bottom and is reliably maintained at the upper and lower edges. In addition, these terminal holding grooves 41 and 42 and the lock bracket holding groove 43 communicate with all 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 import space for the balanced conductor F formed toward 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 the shape of a taper in the taper shape of the terminal 10, and the fixing part 18A of the groove shape of the terminal 10 is fitted, and the terminal 20 is connected. ) And the locking bracket 30 constitutes a holding portion 47A for the fixing portions 28A and 38A of each of the terminal 20 and the locking bracket 30, which are similarly formed at the rear end. 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. The extension part 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). The width direction both ends of the insertion groove 45 are formed so as to receive the range 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 is trapezoidal in longitudinal section, the edge 51A is a vertical surface, and the rear edge 51B is 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-mentioned 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 is not required. It may be located below the lower end of the part 35, and nevertheless obtains the effect by the above-mentioned complement. In addition, in the present invention, the locking projection may be formed in another member held by the housing, for example, a reinforcing bracket, even if the locking projection is not formed in the housing. It may be formed so as to face.

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, as described above. Although a small gap is formed between the gaps, the gap between the terminal 10; 20 and the plate surface of the lock bracket 30 is formed by the site of the terminal 10; 20 and the lock bracket 30. There are large and small differences, that is, wide and narrow groove width.

Terminal retaining grooves 41; 42 in each region including the connecting portions 13; 23; 33, as shown in FIG. 4 showing the cross section at the height at which the connecting portions 13; 23 and 33 are located. 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 shifted 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 were formed at different positions in the front-rear direction, the widths in the regions corresponding to the connecting portions 13 and 23 in the front-back direction were wide. Only by forming the light portions 41A; 42A, the light portions 41A; 42A are shifted and positioned in the light emitting portions 41A; 42A. 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 portions. You may form so that it may transition to light part 41A; 42A. Furthermore, since the connection parts 13 and 23 have the length in the up-down direction corresponding to the space | interval of both arms as a form which connects the upper arm parts 11 and 21 and the lower arm parts 12 and 22, the connection part 13 Even when 23 is 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 up-down direction, so that the large gaps hl and h2 are shifted up and down. You may also

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 established as shown in Figs. 2A to 2C. It is possible to rotate freely between the open position and the closed position of Figs. 9 (A) to (C) falling in the horizontal direction. The movable member 60 gives downward displacement to the rear of the terminals 10; 20 and the upper arm portions 11; 21 and 31 of the lock bracket 30, and the open position before the displacement is generated. The movable member 60 is a position of the movable member 60 that allows the flat conductor F to be inserted into the insertion groove 45 of the housing 40, while the closed position generates displacement and moves the flat conductor F after insertion downward. It is a pressing position.

The said movable member 60 has the operation part 61 which protrudes upwards from all the space 44 like FIG.2 (A)-(C) in an open position, and is located in the site | part below the operation part 61. 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 of all the lower arm parts 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 long elliptical cam portion for the terminal 10 when the movable member 60 is in the open position, as shown in FIG. 2 (B). It has a cross-sectional shape which deform | transformed the upper right corner part of 63 into an angular 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 ) Comes to the closed position, it becomes a longitudinally long posture, and presses the to-be-pressed part 24 upwards 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.

When the cam parts 63 and 64 respectively corresponding to the two types of terminals 10 and 20 come to the movable member 60's closed position, the cams 63 and 64 are perpendicular to the ground in the direction of their rotation axis, that is, in Fig. 2. When viewed from the direction, it is in the same positional relationship as 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 to-be-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 | variety is wider than the cam part 63, and the circular arc of the upper end is biased 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 this case, 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, the reaction forces A and B are balanced on one line X, and the reaction forces C and D are balanced on the other line Y away from the line X. This is caught. 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. Thus, 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 the opposite direction from this neutral state, it is initially based on the reaction force (A, B) on the two lines (X, Y) and the moment by C, D. It returns to the neutral state of and maintains the 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 the movable member is in the closed position, if both cam portions are formed such that the long axes intersect in the ellipses of the two kinds of cam portions 63; 64, the reaction force A of one cam portion 63 is formed. And the line of action of B) are shifted from each other, and the line of action of reaction forces C and D of the other cam portion 64 is also shifted from each other. However, when the two kinds of cam portions 63 and 64 are viewed at the same time, the four reaction forces A, B, C, and D have changed positions of the reaction forces B and D as compared with the case of Fig. 7A. In addition, as a whole, the same balance as in the case of Fig. 7B is achieved. Therefore, the neutral state is stabilized also in this case.

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 connection part 18; 28 of the terminal 10; 20, and the fixing leg of the lock bracket 30 ( 38) Solder is connected to 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 and 22 and 32 of the terminal 10 and 20 and the lock bracket 30 are connected to the upper arm portions 11 and 21 and 31 only by the connecting portions 13 and 23 and 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 with the light emitting portions 41A and 42A 43A, so that the solder rise stops here. , The ivory arm parts 11, 21; 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 and 24 and 34 of the lock bracket 30 correspond to the corresponding cam portions 63 and 64 of the movable member 60; Since no pressure is applied from 65 at all, the pressing portions 15; 25; 35 are at their original positions which are not displaced, and the terminals 10; 20 easily receive the balanced conductors F. Is in. As described above, the lock fitting 30 is located at a position where the pressing portion 35 interferes with the insertion path of the balanced conductor F. As shown in FIG.

(3) After that, as shown in FIGS. 8A to 8C, the balanced conductor F is inserted into the insertion groove 45 of the housing 40. 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 a predetermined position. Therefore, at the time of insertion, the terminals 10 and 20 do not receive an 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 are still not displaced downward. Therefore, with respect to the terminals 10; 20, the balanced conductor F easily enters between the upper arm portions 11; 21 and the lower arm portions 12; 22. When inserting the balanced conductor F, the lock bracket 30 is in a position where the lock part 35 interferes with the balanced conductor F as described above, so that the balanced conductor F is locked at its front end. Advance while pushing up the part 35. Since the lock arm 31A is inclined upward toward the rear from before the insertion of the balanced conductor F, when the inclined portion of the lock portion 35 receives the contact force from the balanced conductor F at the rear edge 35B, The component 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 upward with respect to 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 different position 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 an elongated posture, and the cam portion 63 is the to-be-pressed portion 14 of the terminal 10 and the cam portion 64 is a terminal. The to-be-pressed part 24 of 20 and the cam part 65 press up the to-be-pressed part 34 of the lock bracket 30, respectively. 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 each connected to the connection part 13; 23; 33. 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 press part 15; 25, and the contact part 17 and 27 of the said balanced conductor F and the terminal 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 displaced downward so as to reduce the inclination of the lock arm 31A, which is inclined upward toward the rear, to 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 flat 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 4 is held in the caught portion F2. It enters the entered state. In this way, when the balanced part F enters the caught part F2, the locking part 35 enters from the upper direction, and the locking protrusion 51 enters from the lower part, and the balanced conductor F is pulled back. The locking force is strong and works reliably. 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 in the state of FIG. 7 (A), which are surely maintained in a neutral state, and the movable member 60 is somewhat unstable. 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, i.e., the outgoing direction by inadvertent external force when the balanced conductor F is in the normal connection state, all of the caught portions F2 of the balanced conductor F are The edge presses the lock part 35 of the lock fitting 30 back at its edge 35A. Since all of these edges 35A are vertical, they are engaged with each other with the caught portion F2 in a careful manner, and the lock arms 31A are pulled backward by the reaction force to the rear. However, this lock arm 31A faces the horizontal direction when the movable member 60 is in the closed position, and does not incline with respect to the horizontal direction. Therefore, the lock arm 31A does not generate a component force upward even when subjected to the tension force by the reaction force. In this case, the posture in the horizontal direction is maintained, and the locking function is not weakened. 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 protruding portion 51 'extends forward from the front periphery of the lock portion 35 of the lock bracket 30. As shown in Figs. In this form, when the movable member 60 is in the closed position, the balanced conductor F is pushed downward toward the placing 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 are recessed in the width direction. In other words, the caught portion F2 is lifted upward and securely engaged with the lock portion 35.

Next, in embodiment which moved out, 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. When the movable member 60 is inclined upward toward the rear without receiving any force and 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 portion 35 is displaced downward by the horizontal direction of the lock arm 31A, in the present embodiment shown in FIG. 12, the upper arm portion 31 is moved from the cam portion 63 in the open position. Under the force, the lock arm 31A may be inclined upward toward the rear side, and the force may be released in the closed position to take the horizontal position.

In FIG. 12 (A), the movable member 60 has the cam part 65 of the substantially semicircle 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 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 point. Moreover, when the movable member 60 rotates around the shaft part 66 and comes to the closed position shown to FIG. 12 (B), the said cam part 65 will separate from the to-be-pressed part 34, and the The displacement is released, and 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 18; 28 connections
11; 21 Upper Arm 40 Housing
12; 22 lower arm 41; 42 (terminal) groove
13; 23 connections 41A; 42A Floodlight
14; 24 Pressed parts 45 Imported space (Inset groove)
15; 25 pressing part 60 movable member
17; 27 contacts 63; 64 Pressing part (cam part)

Claims (3)

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 pressing portion, a press portion for receiving a force for displacing the pressing portion in the pressing direction, is formed, and receives a plurality of terminals arranged in a direction perpendicular to the plate surface and a connection portion of the inserted flat conductor. A housing in which an import space is formed and a holding groove for holding the terminal on the plate surface of the terminal is formed at a position where the contact portion is in contact with the balanced conductor, and a pressing portion for applying a force to the pressure portion of the terminal is formed. Is it possible to move between an open position that allows insertion of a balanced conductor and a closed position that presses the balanced conductor to the contact of the terminal? And a terminal having an upper arm portion and a lower arm portion extending by the insertion direction of the flat conductor in the longitudinal direction connected by a connecting portion at their longitudinal intermediate position, wherein the upper arm portion is inserted in the insertion direction of the flat conductor ahead of the connecting portion. In the electrical connector for a circuit board which has a to-be-pressed part in the whole part, and a pressed part in the back part,
The retaining groove is a portion of the range including at least a portion of the connecting portion of the terminal to form a light-emitting portion having a wider groove width than the other portion, and the light-emitting portion is at least partially positioned when viewed from the terminal arrangement direction. Electrical connectors for circuit boards. The method of claim 1,
The electrical connector for a circuit board in which the light-exposure parts with respect to the adjacent terminal are located at least one part differently in the front-back direction. The method according to claim 1 or 2,
The electrical connector for circuit boards in which the light-exposure parts with respect to the adjacent terminal are located at least one part differently in an up-down direction.

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