JP2012134157A - Connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small-sized connector of a laminated structure type, which can prevent a positional deviation of an insulation member.SOLUTION: In the connector, when a first terminal housing 5 and a second terminal housing 7 are fitted with each other, first joint terminals 4a-4c and second joint terminals 6a-6c face to each other so as to be pairs, thereby configuring a plurality of contacts. The first joint terminals 4a-4c and the second joint terminals 6a-6c are alternately disposed, and the respective contacts have a laminated structure sandwiched by insulation members 8a-8d. The connector comprises a connecting member 9 for collectively fixing the first joint terminals 4a-4c and the second joint terminals 6a-6c at the respective contacts and electrically connecting them, by pressing the adjacent insulation member 8a via an elastic member 15, and configures an insulation member assembly 100 by respectively coupling the plurality of insulation members 8a-8d. The insulation member assembly 100 regulates movement among the insulation members in a fitting direction and movement in a width direction.

Description

  The present invention relates to a connector that may be used in an electric harness used for an eco-car such as a hybrid vehicle and an electric vehicle, and particularly used for transmitting a large amount of electric power.

  In recent years, significant progress has been made, for example, in hybrid vehicles, electric vehicles, etc., when transferring a large amount of power for connecting devices, such as between a motor and an inverter, or between an inverter and a battery. For example, a power harness used in the above-described configuration includes, on one end side thereof, a male terminal and a male connector portion including a first terminal housing that houses the male terminal, a female terminal connected to the male terminal, and the female terminal. The connector of the 2 division | segmentation structure with the female side connector part provided with the 2nd terminal housing to accommodate is provided (for example, refer patent document 1).

  In recent years, such eco-cars have been reduced in weight for all parts for the purpose of improving energy-saving performance. However, one of the effective means for reducing the weight is to reduce the size. I hit it.

  Therefore, as a known technique, for example, there is a technique as disclosed in Patent Document 2.

  The technique disclosed in Patent Document 2 is a vehicle that connects a joint terminal of a plurality of phases of conductive members drawn from a motor for driving a vehicle and a joint terminal of a plurality of phases of a power line cable drawn from an inverter that drives the motor. In the electrical connection structure for use, the joining terminal of each phase of the conductive member and the joining terminal of each phase of the corresponding power line cable are polymerized, and the insulating member is disposed on the surface opposite to the overlapping surface of the joining terminal. In this technique, the joined terminals and insulating members of each polymerized phase are fastened and fixed in the polymerizing direction by a single bolt provided at a position penetrating them.

  In other words, the technique of Patent Document 2 is a connection structure in which a plurality of joint terminals and insulating members are stacked, and by joining a single bolt in the stacking direction (also referred to as the stacking direction), the connection terminals are superposed. This is a connection structure in which a plurality of contact points between joint terminals, which are surfaces, are collectively sandwiched and fixed so that the joint terminals are electrically connected to each other, and such a configuration is disclosed in Patent Document 1. It is effective in that it is easy to reduce the size as compared with the above technique.

JP 2009-070754 A Japanese Patent No. 4037199

  However, the technique as disclosed in Patent Document 2 has the following problems.

  (1) Since the holding jig for holding one end of each insulating member is a separate member, there is a problem that the number of parts is large.

  (2) Since the holding jig for holding one end of each insulating member is a separate member, as a result, the coupling portion between the holding jig and the insulating member becomes large, and accordingly, the connection structure as a whole is large. There was a problem of becoming.

  Therefore, the present inventors considered that further miniaturization is necessary when applying the laminated structure type connection structure as in Patent Document 2 to the connector, and as a result, made extensive efforts. An embodiment was considered in which the insulating members were each fixed to one surface and the holding jig was omitted.

  However, this embodiment also has the following problems.

  (1) For example, when the joining terminal is fixed to the cable, the joining terminal moves when an excessive force (for example, a force for pulling the cable or a force for pushing the cable to the connector side) is applied to the cable. As a result, there has been a problem that the displacement of the insulating member occurs. A similar problem is also a bus bar type junction terminal (terminal like a male terminal of reference 4 in Patent Document 1) in which the cable is not fixed. For example, when the connector is dropped, an excessive force may be applied to the front end of the bus bar type joining terminal protruding from the connector. In such a case, the same problem as described above has occurred.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a laminated connector that is small in size and can prevent displacement of an insulating member.

  The present invention has been devised to achieve the above object, and includes a first terminal housing in which a plurality of first joint terminals are arranged and stored, and a first terminal housing in which a plurality of second joint terminals are arranged and stored. When the first terminal housing and the second terminal housing are fitted together, each of the one surface of the plurality of first joining terminals and the plurality of second joints are provided. A plurality of contacts are configured so as to face each other of one side of the terminal, the first joint terminals and the second joint terminals are alternately arranged, and the plurality of contacts are In the connector having a laminated structure sandwiched between the insulating members, the plurality of first joining terminals and the plurality of the plurality of first joining terminals are included by pressing the adjacent insulating members through the elastic members, including elastic members. 2 having a connecting member that fixes and electrically connects the junction terminals together at each contact, and connects the plurality of insulating members to form an insulating member assembly, and the insulating member assembly includes each insulating member assembly. It is a connector characterized by restricting movement in a fitting direction between members and movement in a width direction which is a direction perpendicular to the lamination direction and the fitting direction of the laminated structure.

  In the insulating member, a plurality of first insulating members provided on each of the other surfaces of the plurality of first joining terminals, the plurality of first joining terminals, and the plurality of second joining terminals are stacked. A second insulating member that is disposed so as to face the other surface of the second joint terminal that is sometimes located at the outermost position, from both ends in the width direction of the first insulating member. Forming a connecting piece extending to the first insulating member or the second insulating member facing each other across the first joint terminal provided on both side surfaces of the facing first insulating member or the second insulating member A connecting groove that slidably accommodates the connecting piece in the stacking direction may be formed.

  You may form the fitting groove | channel for fitting the edge part of the width direction of a said 1st junction terminal to the base end part of the said connection piece, and providing a said 1st insulating member in a said 1st junction terminal.

  Locking portions for locking the insulating member assembly to the first terminal housing may be formed at both ends of the insulating member assembly in the stacking direction.

  ADVANTAGE OF THE INVENTION According to this invention, the connector of the laminated structure type | mold which is small and can prevent the position shift of an insulating member can be provided.

It is a figure which shows the connector which concerns on one embodiment of this invention, (a) is sectional drawing, (b) is a side view which shows a 1st junction terminal and an insulation member assembly. (A) is a perspective view of the connector of FIG. 1, (b) is the top view. It is sectional drawing of the 1st connector part in the connector of FIG. It is a figure which shows the 2nd junction terminal in the connector of FIG. 1, (a) is a side view, (b) is a top view. It is a figure which shows the 2nd junction terminal in the connector of FIG. 1, (a) is a side view, (b) is a top view. It is the sectional view on the AA line of FIG.1 (b). It is the BB sectional view taken on the line of FIG. 3, and is the figure which saw through the resin molding.

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

   1 and 2 are views showing a connector according to the present embodiment, in which FIG. 1A is a sectional view, FIG. 1B is a side view showing a first joint terminal and an insulating member assembly, and FIG. (A) is a perspective view, FIG.2 (b) is a top view.

   As shown in FIGS. 1 and 2, the connector 1 according to the present embodiment includes a first connector portion 2 and a second connector portion 3. This is for connecting the power lines together.

  More specifically, the connector 1 includes a first terminal housing (male side terminal housing) 5 in which a plurality (three) of first connecting terminals (male terminals) 4a to 4c are arranged and stored. A second connector part 3 having a part 2 and a second terminal housing (female side terminal housing) 7 in which a plurality (three) of second joining terminals (female terminals) 6a to 6c are arranged and stored; A plurality of (four) insulating members 8a to 8d, which are housed in alignment in the terminal housing 5 and insulate between the first joint terminals 4a to 4c, and the first terminal housing 5 of the first connector portion 2 And the second terminal housing 7 of the second connector portion 3 are fitted in each of one surface of the plurality of first joint terminals 4a to 4c and the plurality of second joint terminals 6a to 6c. Each of the one surface of c becomes a pair (the 1st junction terminal 4a and the 2nd junction terminal 6a, the 1st junction terminal 4b and the 2nd junction terminal 6b, and each pair of the 1st junction terminal 4c and the 2nd junction terminal 6c). The first contact terminals 4a to 4c and the second connection terminals 6a to 6c are alternately arranged, and each contact is sandwiched between the insulating members 8a to 8d. It becomes a laminated state.

  In the connector 1, cables 60 a to 60 c are connected to the first connector portion 2, and cables 61 a to 61 c are connected to the second connector portion 3, and the first connector portion 2 and the second connector portion 3 are connected. Thus, the cables 60a to 60c and the cables 61a to 61c are electrically connected to each other. That is, the connector 1 is used for connecting cables.

  The connector 1 is used, for example, for connection between a vehicle driving motor and an inverter that drives the motor. In the present embodiment, as an example, a case will be described in which the cables 60a to 60c are cables extended from a motor and the cables 61a to 61c are cables extended from an inverter.

  Hereinafter, each structure of the connector parts 2 and 3 is explained in full detail.

[First connector part]
First, the 1st connector part 2 is demonstrated.

  As shown in FIGS. 1-3, the 1st connector part 2 has arrange | positioned and hold | maintained three 1st junction terminals 4a-4c in the state spaced apart by predetermined spacing inside, and is 3 first junction terminals A first terminal housing 5 in which 4a to 4c are arranged and stored; a plurality of substantially rectangular parallelepiped insulating members 8a to 8d that are provided in the first terminal housing 5 and insulate each of the first connecting terminals 4a to 4c; A connecting member 9 that fixes and electrically connects the plurality of first joining terminals 4a to 4c and the plurality of second joining terminals 6a to 6c together at each contact by pressing adjacent insulating members 8a. Is provided.

Cables 60a to 60c extending from the motor side are connected to one end sides of the first joining terminals 4a to 4c, respectively. The cables 60 a to 60 c are formed by forming an insulating layer 63 on the outer periphery of the conductor 62. In the present embodiment, the conductor 62 having a cross-sectional area of 20 mm ² is used.

  Electricity of different voltage and / or current is transmitted to each of the cables 60a to 60c. For example, in the present embodiment, a three-phase AC power supply line for the motor and the inverter is assumed, and the cables 60a to 60c and the first connection terminals 4a to 4c have AC phases different from each other by 120 °. Is transmitted. Each of the first connecting terminals 4a to 4c is preferably made of a metal having high conductivity such as silver, copper, or aluminum for the purpose of reducing power transmission loss in the connector 1 or the like. Moreover, each of the 1st junction terminals 4a-4c has some flexibility.

  Each of the cables 60a to 60c is aligned and held at a predetermined interval by a resin molded body (inner housing) 10 having a multi-tubular shape (a shape in which a plurality of tubes are connected). The first joining terminals 4 a to 4 c are fixed to the first terminal housing 5 via the cables 60 a to 60 c and the resin molded body 10.

  The resin molded body 10 is formed of an insulating resin (for example, PPS (polyphenylene sulfide) resin, PPA (polyphthalamide) resin, PA (polyamide) in order to insulate the first connecting terminals 4a to 4c from each other and prevent short circuit. ) Resin, PBT (polybutylene terephthalate), epoxy resin) and the like. Even if each of the cables 60a to 60c connected to each of the first joint terminals 4a to 4c is a cable excellent in flexibility, the first joint terminals 4a to 4c are predetermined. Can be held in the position. That is, in this embodiment, since cables having excellent flexibility can be used as the cables 60a to 60c, the degree of freedom in wiring when the cables 60a to 60c are laid can be improved.

  The resin molded body 10 holds the cables 60a to 60c. More specifically, the resin molded body 10 holds the end portions of the cables 60a to 60c at positions close to the first joint terminals 4a to 4c. The first joint terminals 4a to 4c are positioned in order to hold the first joint terminals 4a to 4c in a predetermined position, but the cables 60a to 60c are held and the first joint terminals 4a to 4c are also directly held. The first connecting terminals 4a to 4c may be positioned. Further, instead of the resin molded body 10, a joining terminal holding member that directly holds the first joining terminals 4 a to 4 c without holding the cables 60 a to 60 c may be used.

  In the case of positioning the first joint terminals 4a to 4c by holding the cables 60a to 60c without directly holding the first joint terminals 4a to 4c with respect to the resin molded body 10, that is, the present embodiment In such a case, by making the cables 60a to 60c flexible, the distal ends of the first joint terminals 4a to 4c can move flexibly with respect to the first terminal housing 5, and the connection member 9 Deformation of the first connecting terminals 4a to 4c due to the pressing can be suppressed.

  In the 1st connector part 2, even if it is a case where cables 60a-60c are pulled, cable 60a-60c is provided with prevention mechanism 11 so that cable 60a-60c may not come off from resin fabrication object 10. The disconnection prevention mechanism 11 protrudes into the projections 11a formed at the respective base end portions (in the vicinity of the cables 60a to 60c) of the first connecting terminals 4a to 4c and the multiple cylindrical tubes of the resin molded body 10. And a locking protrusion 11b that locks the protrusion 11a and restricts the movement of the protrusion 11a to the rear (left side in FIG. 1A).

  As shown in FIG. 1B, each of the first joining terminals 4 a to 4 c is integrally formed with the caulking portion 32 for caulking the conductor 62 exposed from the distal end portions of the cables 60 a to 60 c and the caulking portion 32. It has the plate-shaped contact 33 formed. The protrusions 11a of the drop prevention mechanism 11 are formed so as to protrude upward (or downward) from both end portions in the width direction at the base end portion of the plate contact 33 (see FIG. 7).

  Further, in the present embodiment, in order to reduce the size of the connector 1, each of the cables 60a to 60c is arranged and held with as little gap as possible. Therefore, the first joint terminals 4a to 4c are spaced apart at the same interval by bending the body portion 35 of the first joint terminal 4b connected to the cable 60b disposed at the center during alignment.

  The plurality of insulating members 8a to 8d are arranged and stored in the first terminal housing 5 and are opposite to the other surfaces (the surfaces to be joined to the second joining terminals 6a to 6c) of the plurality of first joining terminals 4a to 4c. When the plurality of first insulating members 8b to 8d, the plurality of first joining terminals 4a to 4c, and the plurality of second joining terminals 6a to 6c provided integrally with each of the side surfaces are laminated. So as to face the other surface of the second joint terminal 6a located on the outermost side (the uppermost surface in FIGS. 1A and 1B) (the surface opposite to the surface joined to the first joint terminal 4a). The second insulating member 8a is provided.

  The first insulating members 8b to 8d are provided at positions that protrude toward the distal ends of the first connecting terminals 4a to 4c. As for each of the 1st insulating members 8b-8d, each of the corner | angular part by which the 2nd junction terminal 6a-6c is inserted / extracted is chamfered. Also in the second insulating member 8a, the corners on the side where the second connecting terminals 6a to 6c are inserted and removed and on the first insulating member 8b side are chamfered. Furthermore, each of the surfaces provided in the first joint terminals 4a to 4c of the first insulating members 8b to 8d is formed with a protrusion (a build-up surface) that compensates for a step with the first joint terminals 4a to 4c. The upper surfaces (upper surfaces in the drawing) of the first insulating members 8b to 8d are flush with the upper surfaces (upper surfaces in the drawing) of the first connection terminals 4a to 4c. With these configurations, when the first connector portion 2 and the second connector portion 3 are fitted, the tip ends of the first joint terminals 4a to 4c are in contact with the tip portions of the second joint terminals 6a to 6c to be inserted. Therefore, there is an effect that insertability in the second junction terminals 6a to 6c is improved.

  In the connector 1 according to the present embodiment, the insulating members 8a to 8d are connected to each other, and the movement of the insulating members 8a to 8d in the fitting direction (the left-right direction in FIGS. 1A and 1B), The movement in the stacking direction of the stacked structure (up and down direction in FIGS. 1A and 1B) and the width direction (the paper surface direction in FIGS. 1A and 1B) that is perpendicular to the fitting direction. The insulating member assembly 100 is configured by regulation. Details of the insulating member assembly 100 will be described later.

  The connecting member 9 has a substantially cylindrical head portion 9a, and a wrench or the like is provided in a deformed hole (here, a star-shaped hole) 9b formed on the upper surface of the head portion 9a (the surface opposite to the second insulating member 8a). When the head 9a is rotated by fitting the tool, the head 9a is moved to the second insulating member 8a side to press the second insulating member 8a. The structure for moving the head portion 9a to the second insulating member 8a side in accordance with the rotation is not particularly limited here. For example, two protrusions projecting radially outward from the opposed positions of the side surfaces of the head portion 9a The protrusion may be screwed into a spiral groove formed in the first terminal housing 5.

  As the connection member 9, for example, a member made of a metal such as SUS, iron, or copper alloy may be used. In addition, although the resin-made thing may be used as the connection member 9, it is preferable to use a metal-made thing from a viewpoint of intensity | strength. A packing 14 that prevents water from entering the first terminal housing 5 is provided on the outer periphery of the head portion 9a.

  In addition, an elastic member 15 that applies a predetermined pressing force to the second insulating member 8a is provided between the lower surface of the head 9a of the connecting member 9 and the upper surface of the second insulating member 8a immediately below the head 9a. In the present embodiment, the concave portion 9c is formed on the lower surface of the head portion 9a, and the upper portion of the elastic member 15 is accommodated in the concave portion 9c. This is a device for reducing the size of the connector 1 by shortening the distance between the head 9a and the second insulating member 8a even when the length of the elastic member 15 is long to some extent. The elastic member 15 is composed of a metal (for example, SUS) spring. In the present embodiment, the elastic member 15 is positioned as a part of the connection member 9.

  The upper surface of the second insulating member 8a with which the lower part of the elastic member 15 abuts is formed with a concave part 16 that covers (stores) the lower part of the elastic member 15, and the bottom part of the concave part 16 (that is, the lower part of the elastic member 15 abuts). The seat portion is provided with a receiving member 17 made of metal (for example, SUS) that receives the elastic member 15 and prevents damage to the second insulating member 8a made of insulating resin.

  The receiving member 17 is for preventing damage to the second insulating member 8a by dispersing the stress applied from the elastic member 15 to the upper surface of the second insulating member 8a. Therefore, it is preferable to make the contact area between the receiving member 17 and the second insulating member 8a as large as possible. In the present embodiment, in order to increase the contact area between the receiving member 17 and the second insulating member 8a, the receiving member 17 having a shape that contacts the entire bottom surface of the recess 16 is provided.

  The first terminal housing 5 includes a hollow cylindrical body 20 having a substantially rectangular cross section. The outer peripheral portion on one end side (the right side in FIG. 1A) of the cylindrical body 20 to be fitted to the second terminal housing 7 is formed in a tapered shape in consideration of the fitting property with the second connector portion 3. ing. A terminal housing waterproof structure 21 that seals between the first connector portion 2 and the second connector portion 3 is provided on the outer peripheral portion on one end side of the cylindrical body 20. The terminal housing waterproof structure 21 includes a recess 22 formed in the outer peripheral portion on one end side of the cylindrical body 20 and a packing 23 such as an O-ring provided in the recess 22.

  On the other end side in the cylindrical body 20 (left side in FIG. 1A), that is, on the side opposite to the side where the second terminal housing 7 is fitted, an assembly opening 20a which is one cylindrical opening is provided. The insulating member assembly 100 and the resin molded body 10 are inserted and fixed through the assembly opening 20a (details will be described later). At this time, only a part of the resin molded body 10 on the front end side in the insertion direction is accommodated in the first terminal housing 5, and the other part protrudes to the outside of the first terminal housing 5. A packing 10 a that prevents water from entering the first terminal housing 5 is provided on the outer periphery of the distal end portion (portion accommodated in the first terminal housing 5) of the resin molded body 10. Further, a packingless hermetic portion (not shown) is formed on the cable insertion side of the resin molded body 10 to prevent water from entering the first terminal housing 5 through the cables 60a to 60c.

  A flange 24 for attaching the first connector portion 2 to the vehicle body or the like is formed on the outer periphery on the other end side of the cylindrical body 20. The flange 24 has a mounting hole 24a, and a bolt (not shown) is inserted into the mounting hole 24a and is fixed to the vehicle body or the like. In this embodiment, the case where the flange 24 is provided in the first connector portion 2 will be described. However, the flange 24 may be provided in the second connector portion 3, or the first connector portion 2 and the second connector. It may be provided in both of the parts 3. Further, the flange 24 may be omitted.

  The flange 24 is also effective in improving heat dissipation. That is, the surface area of the first terminal housing 5 can be increased by forming the flange 24, and heat generated inside the first connector portion 2 (for example, heat generated at each contact) is generated in the first terminal housing 5. When heat is radiated to the outside via the heat dissipation, the heat dissipation can be improved.

  A connection member insertion hole 26 for inserting the connection member 9 is formed in the upper portion (upper side in FIG. 1A) of the cylindrical body 20. The first terminal housing 5 at the periphery of the connection member insertion hole 26 is formed in a cylindrical shape (hollow cylindrical shape).

  The cylindrical body 20 is preferably formed of a metal such as aluminum having high electrical conductivity and thermal conductivity in order to reduce shielding performance, heat dissipation, and weight of the connector 1, but is formed of resin or the like. You may do it. In the present embodiment, the cylindrical body 20 is made of aluminum.

[Second connector part]
Next, the 2nd connector part 3 is demonstrated.

   As shown in FIGS. 1 and 2, the second connector portion 3 includes a second terminal housing 7 in which a plurality (three) of second joining terminals (female terminals) 6 a to 6 c are arranged and stored.

  Cables 61a to 61c extending from the inverter side are connected to the respective one ends of the second joint terminals 6a to 6c. Each of these cables 61a to 61c is electrically connected to each of the cables 60a to 60c via the first joint terminals 4a to 4c and the second joint terminals 6a to 6c, and thus to each of the cables 60a to 60c. Corresponding voltage and / or current electricity is transmitted respectively. The cables 61 a to 61 c are the same as the cables 60 a to 60 c and are formed by forming an insulating layer 63 on the outer periphery of the conductor 62. In addition, although the same thing as the cables 60a-60c was used as the cables 61a-61c here, you may use what differs in a size etc.

  Each of the cables 61a to 61c is spaced apart and held at a predetermined interval by a multi-tubular resin molded body (inner housing) 30. When the first connector portion 2 and the second connector portion 3 are fitted to each other, the second joint terminals 6a to 6c are paired with the second joint terminals 6a to 6c by the resin molded body 30, respectively. In this way, they are positioned and held so as to be positioned above each of the first connecting terminals 4a to 4c facing (that is, to be connected).

  The resin molded body 30 is made of an insulating resin or the like so as to insulate the second joining terminals 6a to 6c from each other and prevent a short circuit. Even if each of the cables 61a to 61c connected to each of the second joint terminals 6a to 6c is a cable having excellent flexibility, the resin molded body 30 allows each of the second joint terminals 6a to 6c to be predetermined. Can be held in the position.

  In addition, although the resin molding 30 is positioning the 2nd junction terminal 6a-6c by hold | maintaining cable 61a-61c, it is not restricted to this, and while holding cable 61a-61c, it is 2nd junction terminal. 6a-6c may also be held directly and the 2nd junction terminals 6a-6c may be positioned. Further, it may be a joining terminal holding member that directly holds the second joining terminals 6a to 6c without holding the cables 61a to 61c.

  In the case of positioning the second joint terminals 6a to 6c by holding the cables 61a to 61c without directly holding the second joint terminals 6a to 6c with respect to the resin molded body 30, that is, the present embodiment In such a case, by making the cables 61a to 61c flexible, the distal ends of the second connection terminals 6a to 6c can move flexibly with respect to the second terminal housing 7, and the connection member 9 Deformation of the second joint terminals 6a to 6c due to the pressing can be suppressed.

  A braided shield (not shown) for improving the shielding performance is wound around the cable 61a to 61c drawn from the second terminal housing 7. This braided shield is in contact with a cylindrical shield body 41 described later, and is electrically connected to the first terminal housing 5 via the cylindrical shield body 41 (has the same potential (GND)).

  In the second connector portion 3, similarly to the first connector portion 2, even when the cables 61 a to 61 c are pulled, the cables 61 a to 61 c are prevented from coming off from the resin molded body 30. 27 is provided. The disconnection prevention mechanism 27 protrudes into the projections 27a formed at the base ends (near the cables 61a to 61c) of the second connection terminals 6a to 6c and the multiple cylindrical tubes of the resin molded body 30. And a locking protrusion 27b that locks the protrusion 27a and restricts the movement of the protrusion 27a to the rear (right side in FIG. 1A).

  As shown in FIGS. 4 and 5, each of the second joining terminals 6 a to 6 c is formed integrally with the caulking portion 45 for caulking the conductor 62 exposed from the tip ends of the cables 61 a to 61 c and the caulking portion 45. Plate-like contact 46. In addition, the second joint terminals 6a to 6c are spaced apart from each other at the same interval by bending the body 47 of the second joint terminal 6b connected to the cable 61b disposed at the center during alignment. The protrusions 27 a of the drop prevention mechanism 27 are formed so as to protrude upward (or downward) from both ends in the width direction at the base end of the plate-like contact 46.

  Each of the second connection terminals 6a to 6c is preferably made of a metal such as silver, copper, or aluminum having high conductivity for the purpose of reducing power transmission loss in the connector 1 or the like. Moreover, each of the 2nd junction terminals 6a-6c has some flexibility.

  The second terminal housing 7 includes a hollow cylindrical body 36 having a substantially rectangular cross section. Since the first terminal housing 5 is fitted in the second terminal housing 7, the inner peripheral portion on one end side (left side in FIG. 1A) of the cylindrical body 36 fitted with the first terminal housing 5 is In consideration of the fitting property with the first terminal housing 5, it is formed in a tapered shape.

  On the other end side (right side in FIG. 1A) of the cylindrical body 36, a resin molded body 30 that holds and aligns the cables 61a to 61c is housed. A packingless airtight portion 43 is provided on the cable insertion side of the resin molded body 30 so as to prevent water from entering the second terminal housing 7 through the cables 61a to 61c. A packing 44 that abuts on the resin molded body 30 is provided on the outer periphery of the packingless hermetic portion 43.

  In addition, a packing 38 that contacts the inner peripheral surface of the first terminal housing 5 is provided on the outer peripheral portion of the resin molded body 30. That is, the connector 1 has a double waterproof structure by the packing 23 provided on the outer periphery of the packing 23 of the terminal housing waterproof structure 21 and the resin molded body 30.

  Further, the outer periphery of the cylindrical body 36 from which the cables 61a to 61c are drawn is covered with a rubber boot (not shown) that prevents water from entering the cylindrical body 36.

  Moreover, when the 2nd connector part 3 and the 1st connector part 2 are fitted by the upper part (upper side in Fig.1 (a)) of the cylindrical body 36, the connection member provided in the 1st connector part 2 is provided. A connection member operating hole 40 for operating 9 is formed.

  The cylindrical body 36 is preferably formed of a metal such as aluminum having high electrical conductivity and thermal conductivity in order to reduce shielding performance, heat dissipation, and weight of the connector 1, but is formed of resin or the like. You may do it. In the present embodiment, since the cylindrical body 36 is formed of an insulating resin, an aluminum cylindrical shield body is provided on the inner peripheral surface of the other end side of the cylindrical body 36 in order to improve its shielding performance and heat dissipation. 41 is provided.

  The cylindrical shield body 41 has a contact portion 42 that contacts the outer periphery of the first terminal housing 5 made of aluminum when the first connector portion 2 and the second connector portion 3 are fitted together. The first terminal housing 5 is thermally and electrically connected to the first terminal housing 5. Thereby, the shielding performance and heat dissipation are improved. In particular, with regard to heat dissipation, significant improvement is expected by positively releasing heat to the first terminal housing 5 side, which is excellent in heat dissipation.

[Connection between the first connector portion and the second connector portion]
When the two terminal housings 5 and 7 are fitted, the second joint terminals 6a to 6c are inserted between the pair of first joint terminals 4a to 4c and the insulating members 8a to 8d, respectively. And by this insertion, while facing each of one surface of several 1st junction terminals 4a-4c and each of one surface of several 2nd junction terminals 6a-6c, it is 1st junction terminal 4a-. 4c, second joining terminals 6a to 6c, and insulating members 8a to 8d are alternately arranged, that is, the first joining terminals 4a to 4c and the second joining terminals 6a to 6c are paired with the insulating members 8a to 8d. It will be in the lamination state arrange | positioned so that may be pinched | interposed.

  At this time, each of the first insulating members 8b to 8d is provided inside the first connector portion 2 at the distal end side of the first joint terminals 4a to 4c that are aligned and held at a predetermined interval. Therefore, the interval between the insulating members 8b to 8d can be maintained without separately providing a holding jig (see Patent Document 2) for holding the interval between the insulating members 8b to 8d. become. Thereby, each of the 2nd junction terminals 6a-6c can be easily inserted between each of the 1st junction terminals 4a-4c used as a pair, and insulating member 8a-8d. That is, the insertability of the second connection terminals 6a to 6c is not lowered. In addition, since it is not necessary to provide a holding jig for holding the interval between the insulating members 8b to 8d, it is very effective in that further downsizing can be realized as compared with the conventional case.

  Further, the contact point related to the first joint terminal 4a and the second joint terminal 6a is sandwiched between the second insulating member 8a and the first insulating member 8b provided on the first joint terminal 4a constituting the contact point. Similarly, the first insulating member 8c (or 4c) provided on the first joint terminal 4b (or 4c) that constitutes the contact is a contact point related to the first joint terminal 4b (or 4c) and the second joint terminal 6b (or 6c). Or 8d) and the first insulating member 8b (or 8c) provided on the first joint terminal 4a (or 4b) constituting another contact.

  In this state, when the head 9a of the connecting member 9 is rotated with a tool such as a wrench and the head 9a is pushed downward, the second insulating member 8a, the first insulating member 8b, and the first insulating member 8c are pressed by the elastic member 15. The first insulating member 8d is pressed in this order, and each of the contacts is pressed so as to be sandwiched between any two of the insulating members 8a to 8d so that a pressing force is applied to each contact. They are contacted while being insulated from each other. At this time, each of the first joint terminals 4a to 4c and each of the second joint terminals 6a to 6c are slightly bent by the pressing from the insulating members 8a to 8d and are brought into contact in a wide range. As a result, each contact point is firmly contacted and fixed even in an environment such as a vehicle that generates vibrations.

[Insulation member assembly]
Next, the insulating member assembly 100 which is a main part of the present invention will be described.

   6 is a cross-sectional view taken along the line AA in FIG. 1B, and FIG. 7 is a cross-sectional view taken along the line BB in FIG.

  As shown in FIGS. 1B, 6, and 7, the insulating member assembly 100 is configured by sequentially connecting the insulating members 8 a to 8 d in the stacking direction. That is, the insulating member assembly 100 is configured by connecting the second insulating member 8a and the first insulating member 8b, the first insulating member 8b and the first insulating member 8c, and the first insulating member 8c and the first insulating member 8d, respectively. Is done.

  In the insulating member assembly 100, by connecting the insulating members 8a to 8d, the movement in the fitting direction and the movement in the width direction of the insulating members 8a to 8d are regulated. Further, in the insulating member assembly 100, the insulating members 8a to 8d are coupled so as to be relatively movable in the stacking direction in order to transmit the pressing force by the connecting member 9 to the respective contacts.

  Specifically, the first insulating members 8b to 8d sandwich the first joint terminals 4a to 4c provided with the first insulating members 8b to 8d from both ends in the width direction of the first insulating members 8b to 8d. Connecting pieces 81 extending to the opposing insulating members 8a to 8c (the second insulating member 8a for the first insulating member 8b, the first insulating member 8b for the first insulating member 8c, and the first insulating member 8c for the first insulating member 8d). Are integrally formed.

  In addition, the insulating members 8a to 8c facing the first insulating members 8b to 8d (facing the first connecting terminals 4a to 4c provided with the first insulating members 8b to 8d) are connected to the insulating members 8a to 8c. Connection grooves 82 are formed on both side surfaces to accommodate the connection pieces 81 slidably in the stacking direction.

  The connecting piece 81 of the first insulating member 8b is connected to the connecting groove 82 of the second insulating member 8a, the connecting piece 81 of the first insulating member 8c is connected to the connecting groove 82 of the first insulating member 8b, and the connecting piece of the first insulating member 8d. By accommodating 81 in the connecting groove 82 of the first insulating member 8c, the insulating members 8a to 8d are connected in a state of being relatively movable in the stacking direction, and the insulating member assembly 100 is configured.

  The width of the coupling groove 82 in the fitting direction is formed to be substantially equal to the width of the coupling piece 81 to be accommodated in the fitting direction. As a result, the movement of the insulating members 8a to 8d in the fitting direction is restricted. Further, the coupling pieces 81 formed at both end portions in the width direction of the first insulating members 8b to 8d are accommodated in the coupling grooves 82 formed on both side surfaces of the opposed insulating members 8a to 8c, thereby opposing insulation. Since the members 8a to 8c are sandwiched between the connecting pieces 81 in the width direction, the movement in the width direction between the insulating members 8a to 8d is restricted.

  Further, in the insulating member assembly 100, when the insulating members 8a to 8d are connected (stacked), the tip (upper end) of the connecting piece 81 is regulated by the step 82a that is the terminal end of the connecting groove 82, and the insulating members 8a to 8d are connected. The interval between 8d is regulated so as not to be narrower than a predetermined interval (referred to as a minimum stacking interval).

  This minimum stacking interval is adjusted to be slightly smaller than the total thickness (referred to as contact thickness) of the first joining terminals 4a to 4c and the second joining terminals 6a to 6c constituting the contact. When the minimum stacking interval is larger than the contact thickness, the pressing force by the connecting member 9 is not transmitted to the contact, and when the minimum stacking interval is too small, the first joint terminals 4a to 4c are deformed for some reason. This is because the positional deviation in the stacking direction of the insulating members 8a to 8d becomes too large, and problems such as deterioration of fitting property occur. The minimum stacking interval can be adjusted by adjusting the length difference in the stacking direction between the connecting piece 81 and the connecting groove 82 (for example, the connecting piece 81 is made longer than the length of the connecting groove 82). The minimum stacking interval will become longer.

  The widths of the insulating members 8a to 8d are formed substantially equal to the widths of the first connection terminals 4a to 4c. The interval in the width direction (interval between the inner surfaces) of the connecting pieces 81 formed at both ends in the width direction of the first insulating members 8b to 8d is slightly smaller than the width of the first joint terminals 4a to 4c. The base end portion of each connecting piece 81 is fitted with the end portion in the width direction of the first joining terminals 4a to 4c, and the first insulating members 8b to 8d are provided for the first joining terminals 4a to 4c. A character-like fitting groove 83 is formed. By fitting the first joint terminals 4a to 4c into the fitting groove 83, the first insulating members 8b to 8d are provided in the first joint terminals 4a to 4c.

  By providing the first insulating members 8 b to 8 d on the first joint terminals 4 a to 4 c, the first insulating members 8 b to 8 d are connected to the first joint terminals 4 a to 4 c, the cables 60 a to 60 c, and the resin molded body 10. As a result, the first insulating members 8b to 8d are positioned with respect to the first terminal housing 5. In a state in which the first terminal housing 5 is positioned, a gap is formed between the tip of the connecting piece 81 and the step 82a that is the terminal end of the connecting groove 82, and the first insulating members 8b to 8d are arranged in the stacking direction. It is relatively movable.

  The width of the fitting groove 83 in the stacking direction (width of the U-shaped opening) is formed slightly larger than the thickness of the first joint terminals 4a to 4c. As a result, when the first joining terminals 4a to 4c are fitted into the fitting groove 83, a gap (clearance) is formed between the fitting groove 83 and the first joining terminals 4a to 4c. The first insulating members 8b to 8d are provided with a backlash with respect to the first connecting terminals 4a to 4c. Even if the positions of the first insulating members 8b to 8d are slightly deviated by providing the first insulating members 8b to 8d with rattling with respect to the first connecting terminals 4a to 4c, the first insulating member Since 8b-8d can move flexibly, it can prevent that 2nd junction terminal 6a-6c abuts against the 1st insulating members 8b-8d etc., and a fitting property deteriorates. Further, by forming a gap (clearance) between the fitting groove 83 and the first joining terminals 4a to 4c, the first joining terminals 4a to 4c can be easily fitted into the fitting groove 83. .

  The connecting piece 81 is formed so as to protrude outward in the width direction from the first insulating members 8b to 8d. This is to increase the strength of the connecting piece 81 by increasing the thickness of the connecting piece 81, and to bring the outer surface of the connecting piece 81 into contact with the inner peripheral surface of the first terminal housing 5 (tubular body 20). This is to restrict the movement of the insulating member assembly 100 in the width direction. Therefore, the interval between the outer surfaces of the connecting pieces 81 formed at both ends of the first insulating members 8 b to 8 d is formed to be substantially equal to the interval between the inner peripheral surfaces of the first terminal housing 5.

  Further, the insulating member assembly 100 is locked to the first terminal housing 5 at both ends of the insulating member assembly 100 in the stacking direction, that is, at the outermost second insulating member 8a and the first insulating member 8d. Locking portions 84 and 85 are formed respectively.

  The locking portion 84 is a rear end portion in the fitting direction of the second insulating member 8a and extends upward from both end portions in the width direction (on the side opposite to the first insulating member 8b), and is 90 above the second insulating member 8a. It is bent so as to extend outward in the width direction. The locking portion 84 is a partition formed on the inner peripheral surface of the first terminal housing 5 when the insulating member assembly 100 is inserted into the first terminal housing 5 (tubular body 20) from the assembly opening 20a. The insulating member assembly 100 is configured to be engaged with the first terminal housing 5 by being locked to the wall 86.

  The partition walls 86 are formed along the stacking direction on the inner peripheral surfaces (left and right surfaces in FIG. 7) on both sides of the first terminal housing 5 on the assembly opening 20a side of the connection member insertion hole 26. When a pressing force is applied by the connecting member 9, the locking portion 84 moves along the partition wall 86, and the second insulating member 8a moves in the stacking direction. Further, a step 86a is formed in the partition wall 86, and the locking portion 84 is configured not to move below the step 86a (on the first insulating member 8b side). That is, the locking portion 84 has a role of positioning the insulating member assembly 100 in the fitting direction, a role of guiding movement of the second insulating member 8a in the stacking direction, and movement of the second insulating member 8a in the stacking direction. This also serves to regulate the lower limit (the position when moving most toward the first insulating member 8b).

  On the other hand, the locking portion 85 is formed so as to extend downward (on the opposite side to the first insulating member 8c) from both ends in the width direction at the rear end portion in the fitting direction of the first insulating member 8d. When the insulating member assembly 100 is inserted into the first terminal housing 5 (cylindrical body 20) from the assembly opening 20a, the locking portion 85 faces the connection member insertion hole 26 (downward in FIG. 7). ) Is engaged with a base 87 formed on the inner peripheral surface of the first terminal housing 5, and the insulating member assembly 100 is positioned together with the engaging portion 84 in the fitting direction with respect to the first terminal housing 5. ing. Note that the pedestal 87 has both the role of locking the locking portion 85 and the role of regulating the downward movement of the first insulating member 8d (the side opposite to the first insulating member 8c).

  Further, the locking portion 85 is formed so as to protrude outward in the width direction from the first insulating member 8d, and the interval between the outer surfaces in the width direction is the same as the interval between the outer surfaces in the width direction of the connecting piece 81 ( That is, it is formed to have the same width as the connecting piece 81. Furthermore, the engaging portion 85 is configured to extend upward along the rear end portion in the fitting direction of the first insulating member 8d so as to be connected to the lower portion of the connecting piece 81, whereby the first terminal housing 5 ( The insulating member assembly 100 is configured to be more stably positioned with respect to the first terminal housing 5 by increasing the area of contact with the inner peripheral surface of the cylindrical body 20). In addition, the front surface in the fitting direction of the engaging portion 85 of the portion extending upward is formed flush with the inner wall of the connecting groove 82 in the rear direction in the fitting direction, and serves to reinforce the connecting groove 82. Yes.

  In the present embodiment, the locking portion 85 is formed not only on the first insulating member 8d but also on the first insulating members 8b and 8c. In the first insulating members 8b and 8c, the locking portion 85 is not necessary and can be omitted. However, the first insulating member 8b is formed by forming the locking portion 85 in the first insulating members 8b and 8c. It becomes possible to make -8d into the same shape and to reduce manufacturing cost. Further, the first insulating member 8d is also formed with a connection groove 82 that is not necessary originally, for the same reason.

  In the present embodiment, the connecting piece 81 is formed on the first insulating members 8b to 8d and the connecting groove 82 is formed on the opposing insulating members 8a to 8c. However, in the insulating member assembly 100, the connecting piece 81 and the connecting groove are formed. Of course, it is possible to reverse the relationship of 82 (the connecting piece 81 is formed on the insulating members 8a to 8c and the connecting groove 82 is formed on the opposing insulating members 8b to 8d). However, in this case, since the fitting groove 83 cannot be formed in the connecting piece 81, a mechanism for separately providing the first joining terminals 4a to 4c must be provided in the first insulating members 8b to 8d. The structure of the 1 insulating members 8b to 8d is complicated.

  When the first connector portion 2 is assembled, the insulating member assembly 100 is inserted from the assembly opening 20a, and the locking portions 84 and 85 are locked to the partition wall 86 and the pedestal 87, respectively. 100 is disposed in the first terminal housing 5, and the resin molded body 10 is further inserted into the first terminal housing 5 by inserting the resin molded body 10 from the assembly opening 20 a. Then, the locking portions 84 and 85 are sandwiched between the first terminal housing 5 (the partition wall 86 and the base 87) and the resin molded body 10, and the insulating member assembly 100 is fixed to the first terminal housing 5. The

[Operation of this embodiment]
The operation of the present embodiment will be described.

  In the connector 1 according to the present embodiment, the insulating members 8a to 8d are connected to each other, and the insulating member assembly 100 is configured by restricting the fitting direction and the width direction movement of the insulating members 8a to 8d. Yes.

  Thereby, even if it is a case where force (for example, the force which pulls cable 60a-60c and the force which pushes cable 60a-60c to the 1st connector part 2 side) is added to cables 60a-60c, insulating members 8a-8d Misalignment can be prevented, and as a result, it is possible to prevent the second joining terminals 6a to 6c from abutting against the insulating members 8a to 8d when connecting both the connector portions 2 and 3, and the fitting operation. Can be performed smoothly. Further, the connector 1 is small because no holding jig is used unlike the conventional connector.

  Furthermore, in the connector 1, since the first insulating members 8b to 8d are provided with shakiness with respect to the first connecting terminals 4a to 4c, the first insulating members 8b to 8d are provided when the two connector portions 2 and 3 are connected. The insulating members 8b to 8d can be flexibly moved according to the positions of the second connecting terminals 6a to 6c, and the fitting property can be further improved.

  Further, in the connector 1, the insulating members 8a to 8c facing each other with the first connecting terminals 4a to 4c provided with the first insulating members 8b to 8d are sandwiched from both ends in the width direction of the first insulating members 8b to 8d. The extending connecting piece 81 is formed, and the connecting groove 82 for slidably receiving the connecting piece 81 in the stacking direction is formed on both side surfaces of the opposing insulating members 8a to 8c.

  Thereby, each insulation member 8a-8d can be moved relatively in the lamination direction, and the pressing force by the connection member 9 can be transmitted to each contact. Further, the base end portion of the connecting piece 81 is fitted to fit the end portions in the width direction of the first joint terminals 4a to 4c to provide the first insulating members 8b to 8d on the first joint terminals 4a to 4c. The groove 83 can be formed, and the structure of the first insulating members 8b to 8d can be simplified.

  Further, in the connector 1, locking portions 84 and 85 for locking the insulating member assembly 100 to the first terminal housing 5 are formed at both ends of the insulating member assembly 100 in the stacking direction. The insulating member assembly 100 is fixed to the first terminal housing 5 by sandwiching the stoppers 84 and 85 between the first terminal housing 5 and the resin molded body 10.

  As a result, the insulating member assembly 100 can be easily positioned with respect to the first terminal housing 5, and the insulating member assembly 100 is firmly fixed to the first terminal housing 5. The position shift (position shift in the fitting direction) of the entire 100 can be suppressed.

  The present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of the present invention.

  For example, in the above embodiment, a three-phase AC power line is assumed. However, according to the technical idea of the present invention, for example, a connector for an automobile, which is a three-phase AC between a motor and an inverter. It is also possible to adopt a configuration in which lines for different uses such as a power line for power supplies and a DC two-phase power line for air conditioners are connected together. By configuring in this way, it is possible to connect power lines for a plurality of uses at once with a single connector, so there is no need to prepare different connectors for each use, saving space and reducing costs. Can contribute.

  Also, the surface of each of the first joint terminals 4a to 4c and the second joint terminals 6a to 6c is roughened by knurling, etc., increasing the frictional force, making it difficult for the terminals to move, and fixing at the respective contacts. You may make it harden.

  Moreover, in the said embodiment, although the case where the 1st junction terminals 4a-4c were the terminals provided in the edge part of cable 60a-60c was demonstrated, not only this but 1st junction terminals 4a-4c Alternatively, a bus bar or the like to which no cable is connected may be used.

  Furthermore, in the said embodiment, although the case where the 1st insulation members 8b-8d were provided in the 1st junction terminals 4a-4c by fitting the 1st junction terminals 4a-4c in the fitting groove 83 was demonstrated, The first insulating members 8b to 8d are fixed to the first connecting terminals 4a to 4c by insert molding, or the first connecting terminals 4a to 4c are press-fitted and fixed to the first insulating members 8b to 8d. Good. However, when insert molding or press-fitting is used, rattling of the first insulating members 8b to 8d with respect to the first joint terminals 4a to 4c is eliminated, so from the viewpoint of improving fitting properties, the first joint terminals 4a to 4 A structure in which 4c is fitted in the fitting groove 83 is desirable.

  Moreover, in the said embodiment, although the cable excellent in flexibility was used as the cables 60a-60c and 61a-61c, a rigid cable may be used.

  Moreover, in the said embodiment, the direction in the use condition of a connector may be the connection member 9 in a substantially horizontal state, or a substantially vertical state. In other words, the usage condition of the connector in this embodiment does not require the orientation in the usage state.

  Moreover, in the said embodiment, although the 2nd insulating member 8a which adjoins is pressed by the head 9a of the connection member 9 via the elastic member 15 which is a part of the connection member 9, the elastic member 15 is interposed. Instead, the adjacent second insulating member 8a may be pressed directly by the head 9a.

  In the above embodiment, the connection member 9 is provided only on one side of the first terminal housing 5. However, the connection member 9 is provided on both sides of the first terminal housing 5, and both the sides provided on both sides are provided. You may comprise so that pressing force may be provided to each contact by the connection member 9. FIG.

  Moreover, in the said embodiment, although the connection member 9 was comprised only by the head 9a, you may use the penetration type connection member which formed the axial part which penetrates each contact integrally with the head 9a.

DESCRIPTION OF SYMBOLS 1 Connector 2 1st connector part 3 2nd connector part 4a-4c 1st junction terminal 5 1st terminal housing 6a-6c 2nd junction terminal 7 2nd terminal housing 8a 2nd insulation member 8b-8d 1st insulation member 9 Connection Member 10 Resin molded body 81 Connection piece 82 Connection groove 83 Fitting groove 84, 85 Locking part 100 Insulating member assembly

Claims (4)

A first terminal housing in which a plurality of first joining terminals are arranged and stored;
A second terminal housing in which a plurality of second joining terminals are arranged and stored;
A plurality of insulating members,
When the first terminal housing and the second terminal housing are fitted to each other, the one surface of the plurality of first joint terminals and the one surface of the plurality of second joint terminals face each other. A connector having a laminated structure in which a plurality of contacts are configured, the first joint terminals and the second joint terminals are alternately arranged, and the plurality of contacts are sandwiched between the insulating members,
The plurality of first joining terminals and the plurality of second joining terminals are collectively fixed at each contact by electrically pressing an adjacent insulating member through the elastic member, including an elastic member, and electrically A connecting member for connection;
Connecting the plurality of insulating members to form an insulating member assembly;
The insulating member assembly regulates the movement in the fitting direction between the insulating members and the movement in the width direction which is a direction perpendicular to the lamination direction and the fitting direction of the laminated structure. . The insulating member is
A plurality of first insulating members provided on each of the other surfaces of the plurality of first joining terminals;
A second insulating member disposed so as to face the other surface of the second joint terminal located on the outermost side when the plurality of first joint terminals and the plurality of second joint terminals are in a laminated state; ,
Consists of
While forming the connection piece extended from the both ends of the width direction of the said 1st insulating member to the said 1st insulating member or the said 2nd insulating member which oppose on both sides of the said 1st junction terminal in which the said 1st insulating member is provided ,
The connector according to claim 1, wherein a connecting groove for slidably receiving the connecting piece in the stacking direction is formed on both side surfaces of the opposing first insulating member or the second insulating member. The fitting groove | channel for fitting the edge part of the width direction of the said 1st junction terminal to the base end part of the said connection piece and providing the said 1st insulating member in the said 1st junction terminal was formed. Connector. The connector according to any one of claims 1 to 3, wherein a locking portion for locking the insulating member assembly to the first terminal housing is formed at both ends of the insulating member assembly in the stacking direction.

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