JP4194885B2 - Electrical junction box - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electrical junction box that is mounted on an automobile or the like and has a circuit structure that performs joint absorption of a wire harness.
[0002]
[Prior art]
FIG. 5 shows an example of a conventional electric junction box (Patent Document 1).
[0003]
The electrical connection box 50 can securely fix the joint connector 53 to the joint connector block 51 and can detect the half-fitted state of the joint connector 53. This is provided with a lock member 61 that is inserted from the side of the connector and prevents the joint connector 53 from coming off.
[0004]
The joint connector block 51 accommodates a bus bar (not shown) having a circuit structure for forming a joint circuit, and a tab terminal bent from the bus bar is inserted from a tab insertion hole 58 a formed in the bottom wall 58 of the connector fitting portion 57. It is designed to protrude.
[0005]
In addition to the connector fitting portion 57, three connector mounting portions 60 are arranged in parallel on the component mounting surface 54 a of the joint connector block 51. Each connector mounting portion 60 is fitted with a connector (not shown), and the connector fitting portion 57 is fitted with a block body 52 in which a plurality of joint connectors 53 are combined.
[0006]
Each connector housing 54 is formed in a plate shape from a synthetic resin material, and a plurality of terminal accommodating chambers 55 for accommodating female terminals (not shown) are arranged side by side. The female terminal is formed by punching and bending a conductive metal plate, and an electric wire constituting the wire harness is connected to one side, and a tab terminal is electrically connected to the other side. A plurality of convex portions 56 with which the lock member 61 engages are provided along the slide insertion direction of the joint connector 53 on the lower half of the side surfaces on both sides of the connector housing 54.
[0007]
The connector fitting portion 57 is surrounded on all four sides by wall portions, and guide grooves 59a for guiding the convex portions 56 of the connector housing are formed between adjacent ribs 59 on the opposing inner wall surfaces. . By engaging the convex portion 56 with the guide groove 59 a, the block body 52 is slidably guided by the connector fitting portion 57.
[0008]
The lock member 61 is made of a synthetic resin material, is provided separately from the joint connector block 51, and is formed in a substantially U shape from a base portion 61a and a pair of arm portions 61b and 61b. The pair of arm portions 61 b and 61 b are inserted between the guide projection 59 b and the convex portion 56 formed on the inner wall surface of the connector fitting portion 57 through the through hole 57 a formed in the connector fitting portion 57. Thus, the plurality of joint connectors 53 combined with the block body 52 are collectively fixed to the joint connector block 51 .
[0009]
However, in the above-described conventional electrical junction box 50, the guide groove 59a in which the convex portion 56 of the connector housing 54 is slid-guided has a side wall (on the wire lead-out side and the side of the lower half (bottom side) of the connector fitting portion 57. Since the joint connector 53 is slidably guided from the middle of the mating, the joint connector 53 is not aligned at the initial stage of mating, and the connector mating portion is blind. 57 to be inserted. For this reason, the convex portion 56 and the guide groove 59a are not smoothly engaged, and there is a concern that the fitting workability of the joint connector is impaired.
[0010]
In addition, a gap for inserting the lock member 61 is formed between the inner wall surface of the connector fitting portion 57 and the side wall of the joint connector 53 when the joint connector 53 is fitted to the connector fitting portion 57. Therefore, when the electric wire is pulled carelessly, there is a concern that the joint connector 53 is displaced in the direction in which the female terminals are arranged and the male and female terminals are twisted.
[0011]
The problem of both male and female terminals being twisted is a problem that occurs during assembly before the lock member 61 is attached. If the twisting is severe, the reliability of terminal connection is reduced and the connection between the joint circuit and the external circuit may be poor. There is also.
[0012]
[Patent Document 1]
JP 2002-305828 (page 3-4, FIG. 1)
[0013]
[Problems to be solved by the invention]
In view of the above points, the present invention can smoothly fit a plurality of joint connectors that are fixed together after fitting and connect the joint circuit to an external circuit, and can prevent the terminals from being twisted. An object of the present invention is to provide an electrical connection box capable of maintaining and improving the reliability of terminal connection.
[0014]
[Means for Solving the Problems]
In order to achieve the above object, an electrical junction box according to a first aspect of the present invention has a connector fitting portion having a plurality of slot-like connector fitting chambers in parallel and a bus bar housing portion covered with a cover arranged back to back. A joint connector block made of insulating resin, a bus bar with a plurality of tab terminals, which is accommodated in the bus bar accommodating chamber to form a joint circuit, and has a tab terminal protruding into the connector fitting chamber; a joint connector to have a female terminal which is the connection tab terminal and the terminal that is fitted to each of the connector fitting chamber is projected into the connector fitting chamber, fitted to the plurality of connector fitting chamber and a spacer for locking to fix collectively the plurality of joint connector in the joint connector block, the female to the joint circuit An electrical junction box external circuit Ru is connected via a connected wire harness to the child, the joint connector is made of insulating resin elongated terminal accommodating portion for accommodating the female terminals between both side walls are formed The connector fitting chamber is formed by dividing a rectangular frame surrounded by a wall by a plurality of partition walls, and the connector fitting chamber is fitted into the connector fitting chamber. A bottom portion from the open end of the connector fitting chamber along a wall facing the both side walls among the walls forming the connector fitting chamber in the partition wall facing the both side wall ends of the housing of the joint connector. A guide groove is formed, and a recess is formed at the open end of the wall facing the both side walls of the housing. Guide ribs that engage with the guide grooves and perform positioning in two directions orthogonal to the fitting direction of the joint connector with respect to the connector fitting chamber are formed from the front end side in the fitting direction and face the both side walls. Corresponding to the concave portion formed at the opening end of the wall, a projection is formed that engages the concave portion and performs positioning in the fitting direction, and the locking spacer has a back surface formed flat. And a pair of bendable arm portions that are connected to both ends of the connecting portion at right angles to the back surface side, and the back surface of the connecting portion has an opening end portion of a wall facing the both side walls and the plurality of the plurality of arm portions. The plurality of joint connectors are collectively fixed to the joint connector block by engaging the pair of arms with the joint connector block against the protrusions of the joint connector. And
According to the above structure, a plurality of joint connector into the connector fitting chamber of the joint connector block is fitted, and are connected the female pin in the housing of the tab terminal and the joint connector of the bus bar forming the joint circuit , external circuitry is circuitry connected through a connected wire harness female terminal joint circuit. Further, the flat back surface of the connecting portion of the locking spacer is engaged with the opening end of the wall facing the both side walls of the wall forming the connector fitting chamber and the recess formed in the opening end. A plurality of joint connectors for fixing a plurality of joint connectors to the joint connector block together by locking a pair of arm portions to the joint connector block in a state of being brought into contact with the projections of the plurality of joint connectors combined. The engagement of the locking spacer to the outside of the connector fitting chamber is performed along the wall facing the both side walls among the walls forming the connector fitting chamber in the partition wall facing the both side wall ends of the joint connector housing. In the guide groove formed from the opening end of the connector fitting chamber to the bottom, it is formed on the both side wall ends of the joint connector housing from the front end side in the fitting direction. Since the guide ribs are engaged and positioning in two directions perpendicular to the fitting direction of the joint connector with respect to the connector fitting chamber is performed, the joint connector slides from the initial fitting stage to the final fitting stage. Since the electrical contact part side of the terminal that is guided and incorporated in the joint connector is constrained, the joint connector fitting workability is improved and the terminals are effectively prevented from being twisted , and the reliability of the terminal connection is improved. you.
[0016]
The invention of claim 2 Symbol placement, in the electric connection box according to claim 1 or 2, wherein the projecting margin of the guide ribs, about 1/2 of the dimension of the height of the walls defining a terminal accommodating portion It is characterized by being.
According to the above configuration, it is possible to prevent deformation such as bending or bending due to a decrease in strength of the guide rib.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Specific examples of embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows an embodiment of an electrical junction box according to the present invention.
[0020]
A joint box (electric connection box) is an electrical connection component that is mounted on a vehicle such as an automobile, and an external circuit is connected to a circuit structure such as a bus bar that forms a joint circuit via a wire harness to branch an electric signal into a plurality of parts. is there.
[0021]
The joint box (electric connection box) 10 includes a joint connector block 12 and a joint connector 25. Joint connector block 12 includes an insulating resins made case 13, the vertical and horizontal directions of the plurality of bus bars 43, 44 are inserted from below into the casing 13, made of an insulating resin to prevent inadvertent bus bars 43, 43 Cover (not shown). The joint connector 25 to which the electric wires 41 are connected is inserted from the upper side of the case 13 so that the female terminals 33 accommodated in the housing 26 are connected to the tab terminals 43a and 44a of the bus bars 43 and 44, respectively. .
[0022]
The joint box 10 according to the present invention positions the joint connector 25 fitted in the connector fitting chamber 18, prevents the tab terminals 43a, 44a of the bus bars 43, 44 and the female terminals 33 from being twisted, and connects the terminals. A case 13 having a connector fitting portion 17 having a plurality of connector fitting chambers 18 in parallel on the upper side and a bus bar accommodating portion 19 for receiving bus bars 43 and 44 on the lower side, and a bus bar A connector 26 having a female terminal 33 connected to the tab terminals 43a and 44a of the connector 44 and a housing 26 for accommodating the female terminal 33, and a joint connector 25 for fitting to the connector fitting portion 17; Guide grooves 23 are formed in both side walls (wall portions) 14a, 14a to be formed, and both side walls (wall portions) 31, 31 on the insertion tip side of the housing 26 are formed. Is characterized in that the guide rib 24 that engages with the guide groove 23 (FIGS. 3 and 4) is formed.
[0023]
The present invention is not limited to the formation of the guide grooves 23 in the side walls 14a, 14a of the connector fitting chamber 18 and the formation of the guide ribs 24 in the side walls 31, 31 of the housing 26. Guide ribs may be formed on both side walls 14 a and 14 a of the chamber 18, and guide grooves may be formed on both side walls 31 and 31 of the housing 26.
[0024]
Further, since the guide rib 24 is formed on both side walls 31, 31 on the insertion tip side of the housing 26, the electrical contact portion 34 side of the female terminal 33 incorporated in the joint connector 25 is restrained and orthogonal to the insertion direction of the joint connector 25. It is possible to effectively prevent the positional deviation in the direction to be performed.
[0025]
Below, the main structural part of the joint box 10 and its effect | action are demonstrated in detail.
For convenience of description of the joint box, the concepts of the front-rear direction, the left-right direction, and the up-down direction are defined as follows. The front-rear direction is defined as a direction in which the pair of brackets 20, 20 are opposed to each other, the left-right direction is defined as the direction in which the female terminals 33 accommodated in the joint connector 25 are arranged, and the up-down direction is the insertion direction of the joint connector 25. It shall be determined as follows. The upper side in the vertical direction is the side where the connector fitting portion 17 is located, and the lower side is the side where the bus bar housing portion is located.
[0026]
The case 13 forming the joint connector block 12 has a connector fitting portion 17 in the upper half and a bus bar accommodating portion 19 covered with a cover (not shown) in the lower half, respectively, and a vehicle body panel (not shown) in the front-rear direction. A pair of brackets 20, 20 are fastened and fixed to each other.
[0027]
The connector fitting portion 17 has a plurality of slot-like connector fitting chambers 18 arranged in parallel. Each connector fitting chamber 18 has a vertical partition wall (wall portion) in a rectangular frame surrounded by front, rear, left and right walls. ) And are formed at equal pitches at 18a. The partition wall 18a and rear wall 14b, a plurality of ribs 18b are projected at an equal pitch. Protruding length of the ribs 18b are in short, corresponds (opposite) to each rib 18b and the partition wall 29 is positioned in the housing 26 of the joint connector 25, the terminal accommodating space that is formed between the ribs 18b .
[0028]
Each connector fitting chamber 18 has an opening at the top. The narrow left and right walls are the opposite left and right side walls 14a and 14a of the case 13, and the wide front and rear walls are the partition wall 18a, the front wall 14c, or the rear wall 14b.
[0029]
Guide grooves 23 are formed in the partition wall 18a and the rear wall 14b of each connector fitting chamber 18 along the left and right side walls 14a, 14a. The guide groove 23 is formed so as to communicate from the open end of the connector fitting chamber 18 to the bottom (FIG. 2). For this reason, the joint connector 25 is slide-guided from the beginning of fitting to the end of fitting, so that the fitting workability of the joint connector 25 is improved.
[0030]
Corresponding to the guide groove 23, guide ribs 24 are formed on both side walls 31, 31 of the joint connector 25 (housing 26) so as to protrude in the direction in which the partition wall 29 rises (FIGS. 3 and 4). Although the guide rib 24 will be described later, the guide rib 24 engages with the guide groove 23 to prevent the terminals from being twisted and to improve the reliability of terminal connection.
[0031]
A rectangular recess 45 is formed at the open ends of the left and right side walls 14a, 14a of each connector fitting chamber 18. Corresponding to the recess 45, protrusions 46 are formed on both side walls 31, 31 of the joint connector 25 (housing 26) so as to protrude laterally (left and right direction) (FIGS. 3 and 4).
[0032]
The protrusion 46 is formed on the opening end side where the electric wire 41 is led out from the joint connector 25, and the end surface of the protrusion 46 is formed in the same plane as the end surface of the housing 26. By thus formed, the back surface of the connecting portion 38 of the locking spacer 37 (flat surface), it applied to the end face of the end face of the projection 46 and the housing 26 are, seating of locking spacer 37 with stable, The joint connector 25 is securely locked without rattling.
[0033]
Not shown cover, after the bus bars 43 and 44 is mounted on the busbar accommodating portion 19, is placed beneath the busbar accommodating portion 19, is intended to prevent falling off of the bus bar 43, 44. Locking protrusions (not shown) are formed on the side walls 14a, 14a on both sides of the case 13, and engaging portions (not shown) are formed on the inner surface of the cover. The cover is attached by engaging the portion and the locking projection.
[0034]
The bus bar accommodating portion 19 is formed inside the case 13 and includes longitudinal grooves (not shown) defined by a plurality of partition walls (not shown) extending in the front-rear direction, and notches formed in the plurality of partition walls. It is comprised from the horizontal groove (not shown) connected in the direction orthogonal to a vertical groove.
[0035]
The bus bars 43 and 44 are composed of a vertical bus bar 43 and a horizontal bus bar 44, and are formed by punching a conductive substrate and bending it as necessary. The vertical bus bar 43 includes a band portion 43b, a plurality of tuning fork-shaped holding terminals 43c protruding from one side of the band portion 43b, and tab terminals 43a protruding from the other side of the band portion 43b. Yes. Each clamping terminal 43c is a terminal in which a slit 43d is formed between a pair of clamping pieces, and a band 44b of the horizontal bus bar 44 is clamped in the slit 43d so that a joint circuit is formed. .
[0036]
The horizontal bus bar 44 includes a band portion 44b and a tab terminal 44a that protrudes from one side of the band portion 44b. The tab terminal 44a is inserted into a terminal insertion hole formed in the bottom (not shown) of the bus bar accommodating portion 35, protrudes into the connector fitting chamber 18, and is connected to the female terminal 33 of the joint connector 25. It has become. In addition, about the circuit structure of the vertical bus bar 43 and the horizontal bus bar 44 which form a joint circuit, it is due to propose in another application, and detailed description in this specification is abbreviate | omitted.
[0037]
An enclosure frame 16 for receiving the arm portion 39 of the locking spacer 37 is formed outside the connector fitting portion 17 at the corner portion of the outer wall of the joint connector block 12. By inserting the arm portion 39 of the locking spacer 37 into the cylinder of the enclosure frame 16, the arm portion 39 is protected by the enclosure frame 16, and the arm portion 39 is prevented from being inadvertently detached due to external interference or the like. ing.
[0038]
The locking spacer 37 is made of an insulating resin material, has a long shape, extends in a straight line in the horizontal direction, and a pair of arms 39 and 39 that are connected perpendicularly to both ends of the connection 38. The vertical wall 40 is configured to be perpendicular to one side of the connecting portion 38. A slit 40a is formed in the crossing ridge line portion between the arm portion 39 and the vertical wall 40, and the arm portion 39 can be bent. The rear surface of the connecting portion 38 is not formed to be flat, have become so that devoted to ends of a plurality of joint connectors 25.
[0039]
A locking claw 39 a that protrudes inward is formed on the inner surface on the distal end side of the arm portion 39. Are opposed to the locking spacer 39 to the side wall 14a of the case 13, when exposed to the locking spacer 39 to the end portion on the side wall 14 a of the case 13, the arm portion 39 is inserted into the cylinder of the dam 16, engagement The locking pawl 39a is engaged with the protrusion 16a in the cylinder, and the locking spacer 37 is locked. Thus, connecting portion 38 is found against the ends of a plurality of joint connectors 25 are a plurality of joint connector 25 is locked collectively, the joint connector 25 is securely fixed.
[0040]
As shown in FIG. 3 or FIG. 4, the joint connector 25 includes a female terminal 33 connected to the tab terminals 43a and 44a of the bus bars 43 and 44 (FIG. 1) with terminals, and a plate-like housing 26. ing. The joint harness 25 and the electric wire 41 connected to the female terminal 33 constitute a wire harness.
[0041]
Here, the front-rear direction, the up-down direction, and the left-right direction of the joint connector 25 are determined as follows. The front-rear direction refers to the longitudinal direction of the female terminal 33, and the front is the side where the electrical contact portion 34 is located, and the rear is the side where the electric wire connection portion 35 is located. The vertical direction is defined as the direction in which the female terminal 33 is inserted into the housing 26. The left-right direction is defined as the direction in which the plurality of female terminals 33 are arranged.
[0042]
The housing 26 is made of an insulating resin material, and includes a flat substrate 27, a partition wall (wall portion) 29 and a front wall 28 erected orthogonally to the substrate 27, and side walls (wall portions) 31 and 31 on both sides. ing. A protrusion 29 a for preventing the female terminal 33 from coming off is provided approximately in the middle of the depth of the partition wall 29. The protrusion margin of the protrusion 29a is formed to a size that does not hinder insertion of the female terminal 33 inserted from above.
[0043]
An elongated terminal accommodating portion 30 is formed between the adjacent partition walls 29 between the side walls (wall portions) 31 on both sides of the housing 26, and the female terminal 33 is accommodated from the direction of the arrow. ing. The accommodated female terminal 33 has its electrical contact portion 34 abutting against the front wall 28 of the housing 26 so that it cannot be removed forward, and the electrical contact portion 34 abuts against the protrusion 29a so as to fall upward and backward. There is no such thing. That is, the female terminal 33 accommodated in the terminal accommodating portion 30 is prevented from coming out of the terminal accommodating portion 30.
[0044]
The front wall 28 of the housing 26 is formed with an insertion hole 28a through which the tab terminal 43a of the vertical bus bar 43 and the tab terminal 44a of the horizontal bus bar 44 are inserted. The hole entrance of the insertion hole 28a is formed in the tapered surface 28b, and the tab terminals 43a and 44a are inserted into the electrical contact portion 34 of the female terminal 33 while being guided by the tapered surface 28a, and the elastic force of the elastic contact piece 34a. It is to be pinched.
[0045]
The left and right side walls 31, 31 are walls arranged in parallel with the partition wall 29, and the terminal accommodating portion 30 is also formed between the side wall 31 and the partition wall 29. On the outside of the side wall 31, a thick part 31b extending to the front wall 28 side along the side wall 31 and a thick part 31a extending to the opposite side (electric wire outlet side) along the side wall 31 are formed. Has been. The thick wall portions 31a and 31b reinforce the side wall 31 and prevent the side wall 31 from falling.
[0046]
On the rear end side of one thick portion 31a, a protrusion 46 that engages with a recess 45 formed in the left and right side walls 14a, 14a of the connector fitting chamber 18 is formed so as to protrude laterally (in the left-right direction). Yes. Positioning of the rear end side of the joint connector 25, that is, positioning in the fitting direction of the joint connector 25 is performed by the interaction between the recess 45 and the protrusion 46.
[0047]
A guide rib 24 having an L-shaped cross section is formed on the distal end side of the other thick part 31b. The guide rib 24 includes a side end portion 47 and a front end portion 48. The side end portion 47 is a portion that protrudes in the direction in which the side wall 31 rises and extends along the side wall 31, and the front end portion 48 is a thick portion that continues orthogonally to the front end side of the side end portion 47.
[0048]
The protrusion margin h1 (FIG. 4) of the side end portion 47 is formed to have a dimension that is about ½ of the height dimension h2 of the partition wall 29 or the side wall 31 that defines the terminal accommodating portion 30. If formed in such dimensions, the side end portion 47 is prevented from being bent or bent, and the joint connector 25 is reliably positioned.
[0049]
The length L of the side end portion 47 is formed to have a dimension about ½ of the length of the electrical contact portion 34 of the female terminal 33. By forming such a length, the guide rib 24 is constrained by the guide groove 23, and rattling of the joint connector 25 is prevented.
[0050]
The rear end surface 47b of the side end portion 47 is slightly inclined with respect to the side wall 31, and is prevented from being caught when the joint connector 25 is extracted from the connector fitting chamber 18, so that the joint connector 25 can be extracted smoothly. It is like that.
[0051]
The front end portion 48 is formed to be thicker than the side end portion 47, and the thick portion projects inward. Since the thickness dimension of the front end portion 48 is approximately the same as the groove width W (FIG. 2) of the guide groove 23, the inner end face 48 b and the side end face 47 c are groove inner wall surfaces on both sides of the guide groove 23. The joint connector 25 is positioned in the left-right direction by coming into contact with 23a and 23a.
[0052]
A front end surface 48 a of the front end portion 48 is formed in the same plane as the front wall 28. The intersecting ridge line portion between the front end surface 48a and the side end surface 47c is formed on the tapered surface 48c. By forming the tapered surface 48c, the insertability of the joint connector 25 is improved.
[0053]
Further, the upper end surface of the front end portion 48 is formed in the same plane as the upper end surface 47 a of the side end portion 47. The upper end surface (upper end surface 47a) is parallel to the lower surface 27a of the substrate 27, and the upper end surface and the lower surface 27a abut against the opposing wall portions of the connector fitting chamber 18, whereby the joint connector 25 is vertically moved (connector insertion). Positioning in a direction orthogonal to the direction) is performed.
[0054]
According to such a configuration of the guide rib 24, positioning in two directions (left and right direction and up and down direction) orthogonal to the front-rear direction (longitudinal direction of the female terminal 33) of the joint connector 25 is performed and incorporated in the joint connector 25. The electrical contact portion 34 side of the female terminal 33 is restrained, and the terminals are effectively prevented from being twisted, and the reliability of terminal connection is improved.
[0055]
The female terminal 33 is the same as a normal female terminal, and is formed by punching a conductive substrate with a press and bending it. A box-shaped electrical contact portion 34 is formed on one side, and an electric wire connection portion 35 is formed on the other side. Inside the electrical contact portion 34, an elastic contact piece 34a is bent and formed so that the tab terminals 43a and 44a of the bus bars 43 and 44 are sandwiched. The electric wire connecting portion 35 includes a pair of front and rear crimping pieces 35a and 35b, and the core wire portion 41a and the insulating coating portion 41b of the electric wire 41 are crimped. The electric wire connecting portion 35 may be a pair of pressure contact pieces.
[0056]
In addition, this invention is not limited to the said embodiment, In the range which does not deviate from the main point of this invention, it can deform | transform and implement variously.
[0057]
【The invention's effect】
As described above, according to the first aspect of the present invention, the engagement of the locking spacers to the plurality of joint connectors for collectively fixing the plurality of joint connectors to the joint connector block is performed outside the connector fitting chamber. In the guide groove formed from the opening end of the connector fitting chamber to the bottom along the wall facing the both side walls among the walls forming the connector fitting chamber in the partition wall facing the both side wall ends of the housing The guide ribs formed from the front end side in the fitting direction are engaged with both side wall ends of the joint connector housing, and positioning in two directions orthogonal to the fitting direction of the joint connector with respect to the connector fitting chamber is performed. Therefore, the joint connector is slide-guided and joined from the initial mating stage to the final mating stage. Since the electrical contact portion of the built in connector terminal is restrained, thereby improving the fitting operation of the joint connector, prying terminals to each other is effectively prevented, the reliability of the terminal connection is maintained and improved.
[0059]
According to the invention of claim 2 Symbol placement, since the projecting margin of the guide ribs is set to a predetermined projecting margin, the strength reduction of the guide rib is prevented from causing deformation, such as broken or bent. Therefore, the positioning of the joint connector is prevented from being impaired.
[0061]
According to the fifth aspect of the present invention, since the guide rib is composed of the side end portion and the front end portion, the insertability of the joint connector is not impaired, and the two directions orthogonal to the insertion direction of the joint connector are used. Positioning is performed. Therefore, the terminals can be effectively prevented from being twisted, and the reliability of terminal connection can be further improved.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing an embodiment of an electrical junction box according to the present invention.
FIG. 2 is a perspective view of the joint connector block shown in FIG.
FIG. 3 is an exploded perspective view of the joint connector shown in FIG. 1;
4 is a side view of the joint connector shown in FIG. 3. FIG.
FIG. 5 is a perspective view showing an example of a conventional electrical junction box.
[Explanation of symbols]
10 Joint box (electric junction box)
12 Joint Connector Block 14a Side Wall (Wall)
18 Connector fitting chamber 23 Guide groove 24 Guide rib 25 Joint connector 31 Side wall (wall portion)

Claims (2)

A joint connector block made of insulating resin in which a connector fitting portion having a plurality of slot-like connector fitting chambers in parallel and a bus bar accommodating portion covered with a cover are arranged back to back, and a joint accommodated in the bus bar accommodating chamber A bus bar with a plurality of tab terminals that forms a circuit and has a tab terminal protruding into the connector fitting chamber, and is fitted into each of the plurality of connector fitting chambers and protrudes into the connector fitting chamber. the tab terminal and a joint connector to have a female terminal which is the terminal connected, the spacer the locking and fixing collectively fitted said plurality of joint connectors to the plurality of connector fitting chamber to the joint connector block are with the door, the joint circuit to the collector of the external circuit Ru is connected via a connected wire harness female terminal A junction box,
The joint connector has a housing made of an insulating resin in which an elongated terminal accommodating portion for accommodating the female terminal is formed between both side walls,
The connector fitting chamber is formed by dividing a rectangular frame surrounded by a wall into a plurality of partition walls, and the connector fitting chamber includes the housing of the joint connector that is fitted into the connector fitting chamber. A guide groove extends from the opening end of the connector fitting chamber to the bottom along the wall facing the both side walls of the walls forming the connector fitting chamber in the partition wall facing the both side wall ends of the connector. A recess is formed at the opening end of the wall facing the both side walls,
The joint connector is fitted with guide ribs on the both side wall ends of the housing for engaging in the guide groove and positioning in two directions perpendicular to the fitting direction of the joint connector with respect to the connector fitting chamber. And a protrusion for positioning in the fitting direction by engaging with the recess corresponding to the recess formed at the opening end of the wall facing the both side walls. ,
The locking spacer includes a connecting portion having a flat back surface and a pair of deflectable arms that are connected to both ends of the connecting portion at right angles to the back surface side. The plurality of joint connectors are connected to the joint connector block by engaging the pair of arm portions with the joint connector block by contacting the opening ends of the walls facing the both side walls and the protrusions of the plurality of joint connectors. An electrical junction box that is fixed together . The projecting margin of the guide ribs, the electrical junction box of claim 1 Symbol mounting, characterized in that about 1/2 of the dimension of the height of the walls defining a terminal accommodating portion.

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