TWI460943B - Electrical connectors for circuit boards - Google Patents

Description

Electrical connector for circuit substrate

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

In such a connector, since the number of terminals arranged is large, it is required to be arranged at a very small pitch. Therefore, the terminal is formed by maintaining a flat plate surface of the metal plate by being arranged at a right angle to the plate surface. Perform the arrangement of the above-mentioned extremely small pitches.

As such a connector, a connector disclosed in Patent Document 1 is known. In the connector of Patent Document 1, the terminal formed by the flat plate surface is maintained, and the first terminal and the second terminal are used, and the plate faces are parallel to each other and are alternately arranged. The first terminal holding recess and the second terminal holding recess of the case for holding the first terminal and the second terminal are in surface contact with the plate faces of the first terminal and the second terminal by the terminal holding walls, respectively. Further, in Patent Document 1, the terminal holding wall is formed with a wide portion or a notched portion in which a gap is formed between the terminal and the plate surface of the terminal. The positional relationship between the first terminal and the second terminal when viewed in the terminal arrangement direction is not described in the wide portion or the notched portion, and the position of the first terminal and the second portion are viewed from the drawing. The positions of the terminals are the same.

By providing such a wide portion or a notched portion with a portion for forming a gap between the terminal holding wall and the plate surface of the terminal, even if the flux rises along the plate surface of the terminal during soldering, the width is utilized. The gap between the web or the notch prevents the flux from rising further and prevents the flux from reaching: a contact (contact) formed at the upper portion of the terminal.

[Previous Technical Literature]

[Patent Literature]

[Patent Document 1]

Japan Special Open 2007-287398

In the connector of Patent Document 1, although the first terminal and the second terminal are disposed to be in positional interaction, a wide portion or a notch portion for preventing the flux from rising to form a gap is formed when viewed in the terminal arrangement direction. The same location. Therefore, when the terminals are arranged at a very small pitch, the thickness of the terminal holding wall between the adjacent terminals is thinned at the portion of the gap, and the holding strength is lowered. Nevertheless, in order to ensure the holding strength, it is necessary to increase the wall thickness of the above-mentioned gap portion, so that an extremely small pitch arrangement cannot be achieved.

The present invention has been made in view of such circumstances, and an object thereof is to provide an electrical connector for a circuit board, which does not reduce the strength of the terminal of the casing, and can form the terminal with a minimum pitch even if a gap for preventing the flux from rising is formed. arrangement.

An electrical connector for a circuit board according to the present invention is an electrical connector that is disposed on a circuit board and electrically connects the inserted flat conductor to the circuit board, and is provided with a flat plate surface that maintains the metal plate a contact portion that is in contact with the flat conductor, a connection portion that is connected to the circuit board, a pressing portion that presses the flat conductor, and a pressed portion that receives a force that displaces the pressing portion in the pressing direction, and the plate a plurality of terminals arranged in a direction perpendicular to the right direction; and a receiving space for accommodating the connecting portion of the inserted flat conductor, wherein the contact portion is in contact with the flat conductor, and the surface of the terminal is formed a housing for holding the groove of the terminal; and a pressing portion provided with a pressed portion for applying a force to the terminal, which can be inserted into an open position of the flat conductor and a contact portion of the flat conductor toward the terminal a movable member that moves between the pressed closed positions; the terminal is an upper wrist and a lower wrist that extend in a direction in which the flat conductor is inserted in the long axis direction , By connecting the connecting portion is formed in the longitudinal direction thereof intermediate position, the upper arm connecting portion closer to the front than the front direction of the flat conductive member insertion side, has a pressing portion having a pressing portion at the rear side.

In the electrical connector for a circuit board, in the present invention, the retaining groove includes a wide portion having a wider groove width than the other portion in a portion including at least a part of the connecting portion of the terminal, and is viewed from the terminal arrangement direction. At least a part of the position is different when the wide portion is used.

In the present invention of such a configuration, in the holding groove for holding the terminal, a wide portion is formed for each terminal, and by the gap of the wide portion, when the flux is prevented from rising, the wide portion is formed at the joint portion The position is the only rising path from the lower arm portion having the connecting portion for welding to the upper arm portion having the contact portion, and the connecting portion can effectively prevent the flux from rising. Further, when the adjacent terminals are viewed from the terminal arrangement direction, the wide portions are shifted from each other. Therefore, even if a gap is formed in the wide portion, the portion in which the wide portion is not formed can be secured by the above-described staggered method. Since the wall surface of the terminal is held, the strength can be maintained, so that the thickness of the holding grooves can be made thin, and the terminals can be arranged at a very small pitch.

In the present invention, at least a part of the wide portions are located at different positions in the front-rear direction with respect to the adjacent terminals, or at least a part thereof is located at different positions in the up-and-down direction.

According to the present invention, as described above, at least a wide portion is provided in a range of the first portion including the joint portion of the terminal, and a gap is formed, and the wide portions are mutually opposed to each other with respect to the adjacent terminals, at least a part of which is located when viewed from the terminal arrangement direction. In the different positions, a gap is formed on both sides of the terminal, and a portion that is in contact with both surfaces of the terminal in the terminal arrangement direction is provided, and the connection portion can effectively prevent the flux from rising, and the terminal retains the strength. Without being lowered, the terminals can be arranged at a very small pitch.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

As described above, the terminals 10, 20 and the lock fitting 30 are firmly held at the groove bottoms of the terminal holding grooves 41, 42 and the lock fitting holding groove 43, and a slight gap is formed between the terminals and the inner surface of the groove, and the terminal is formed. 10, 20 and the gap between the plate faces of the locking fitting 30, by the positions of the terminals 10, 20 and the locking fitting 30, there is a difference in size, that is, the groove width is wide and narrow.

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

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

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

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

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

The cam portion 65 provided corresponding to the lock fitting 30 has a cross-sectional shape similar to that of the above-described cam portion 64, and is connected to the pressed portion 34 formed at the upper arm portion 31 of the lock fitting 30 even if the movable member 60 is in the open position. . When the movable member 60 comes to the closed position, the cam portion 65 presses the pressed portion 34 to be elastically displaced.

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

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

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

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

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

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

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

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

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

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

In Fig. 12(A), the movable member 60 has a substantially semicircular cam portion 65 as a pressurizing portion at a lower edge of the operation portion 61 and at a boundary with the groove portion 62. When the movable member 60 shown in FIG. 12(A) is in the open position, the cam portion 65 slides to the pressed portion 34 formed at the upper edge of the front portion of the upper arm portion 31 of the locking fitting 30, The pressed portion 34 is pressed downward. Then, the locking arm 31A, which is the rear portion of the upper arm portion 31, is displaced in a posture inclined upward toward the upper side with the connecting portion 33 as a fulcrum. When the movable member 60 is rotated around the shaft portion 66 and brought to the closed position shown in Fig. 12(B), the cam portion 65 is disengaged from the pressed portion 34, and the displacement of the locking arm 31A is released, and the locking arm 31A becomes The posture of the horizontal state.

According to the present invention, when the conductor portion is formed on the upper surface of the flat conductor, the terminal does not need to have a contact portion at the lower arm portion, and the pressing portion of the upper arm portion can also serve as a contact portion to come into contact with the conductor portion. It is also possible to mix: a terminal having a contact portion at the lower arm portion and a terminal portion serving as a contact portion at the pressing portion of the upper arm portion, and so-called staggered arrangement.

10, 20. . . Terminal

11, 21. . . Upper wrist

12, 22. . . Lower wrist

13,23. . . Linkage

14, 24. . . Pressed part

15,25. . . Pressing part

17, 27. . . Contact

18, 28. . . Connection

40. . . case

41, 42. . . (terminal) retaining groove

41A, 42A. . . Wide section

45. . . Containing space (inserted groove)

60. . . Movable member

63, 64. . . Pressurizing part (cam part)

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

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

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

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

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

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

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

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

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

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

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

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

10, 20. . . Terminal

13,23. . . Linkage

30. . . Locking accessories

33. . . Linkage

40. . . case

41, 42. . . (terminal) retaining groove

41A, 42A. . . Wide section

43. . . Locking accessories to keep the groove

43A. . . Wide section

51. . . Locking projection

51A. . . Leading edge

51B. . . Trailing edge

51C. . . Above

H1, h2, h3. . . gap

Claims (3)

An electrical connector for a circuit board is an electrical connector that is disposed on a circuit board and electrically connects the inserted flat conductor to the circuit board, and is provided with a flat plate surface that maintains the metal plate and a contact portion that contacts the flat conductor, a connection portion that is connected to the circuit board, a pressing portion that presses the flat conductor, and a pressed portion that receives a force that displaces the pressing portion in the pressing direction are formed on the surface of the board a plurality of terminals arranged in a direction perpendicular to the right direction; a receiving space for accommodating the connecting portion of the inserted flat conductor; and the terminal portion of the terminal is formed to hold the terminal at a position where the contact portion is in contact with the flat conductor a housing for holding the groove; and a pressing portion provided with a pressed portion for applying a force to the terminal, which can be inserted into an open position of the flat conductor and pressed at a contact portion of the flat conductor toward the terminal a movable member that moves between closed positions; the terminal is an upper wrist portion and a lower wrist portion that extend in a longitudinal direction of the flat conductor insertion direction. The intermediate position in the longitudinal direction is formed by the connection of the connecting portion, and the upper arm portion has a pressed portion at a front portion closer to the front side in the insertion direction of the flat conductor than the connecting portion, and has a pressing portion on the rear side, which is characterized by: The groove, which includes a portion including a portion of the connection portion of the terminal, has a wide portion having a groove width wider than that of the other portion, and the wide portion is at least at least with respect to the adjacent terminal when viewed from the terminal arrangement direction. Some of the locations are different. The electrical connector for a circuit board according to the first aspect of the invention, wherein the wide portions are at different positions in the front-rear direction with respect to the adjacent terminals. The electrical connector for a circuit board according to claim 1 or 2, wherein the wide portions are located at different positions in the up-and-down direction with respect to at least one of the wide portions with respect to the adjacent terminals.