JP2005085741A - Circuit connection structure, electric connection box with circuit connection structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a circuit connection structure for improving commonality of circuit connection parts and an efficiency of connecting work. <P>SOLUTION: In a circuit connection structure in which a bus bars 27a and 27b are disposed on an insulating panel 20A, an opening 22 is provided in the insulating panel 20A at a position where conductive members 27a and 27b are connected to each other and a terminal member 31A is placed in the opening 22, the terminal member 31A is constructed so that at least two terminal strips 33a and 33b horizontally project from an axis portion 32, contact portions 33a and 33b project from the terminal strips 33a and 33b toward the conductive member 27a and 27b, the terminal member 31A is rotated after the axis portion 32 of the terminal member 31A is inserted into the opening 22 in order to press-contact the contact portions 34a and 34b against the surfaces of the conductive members 27a and 27b for connecting the conductive members each other. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a circuit connection structure and an electric connection box provided with the circuit connection structure, and is intended to improve the connection structure of a circuit housed in an electric connection box mounted mainly on an automobile.

  As shown in FIG. 19, in a conventional electrical junction box mounted on an automobile, as a connecting means for conductive materials such as vertically stacked bus bars, conductive materials 2a and 2b on insulating plates 1A and 1B stacked vertically are provided. In some cases, terminal holes 3a and 3b are formed, and the upper and lower ends of the rod-like terminal 4 inserted through the terminal holes 3a and 3b are soldered to the conductive materials 2a and 2b, respectively.

  Further, when using single-core wires as the conductive materials 2a and 2b, a circuit may be formed by arranging the single-core wires in a lattice pattern and connecting them to each other using a pressure contact terminal at the intersection position. For example, Japanese Patent Application Laid-Open No. 9-190833 proposes a press contact terminal 5 that is set in an insulating box 7 by press contact with electric wires 6a and 6b arranged in a lattice shape, as shown in FIG. The press contact terminal 5 is formed by combining two terminal pieces 5A each having a slot 5a so as to be detachable and electrically connected, and a plurality of types of terminal pieces 5A having different widths of the slot 5a. By combining them arbitrarily, it is possible to connect wires of various diameters.

  However, when both ends of the rod-like terminal 4 are connected to the circuit by soldering to the different layers of the conductive materials 2a and 2b shown in FIG. 19, the stress cannot be absorbed and cracks are easily generated on the solder connection part, and the circuit There is a problem that it is not possible to respond flexibly to design changes such as changes. Moreover, since it is necessary to connect the terminal 4 to the conductive materials 2a and 2b before being incorporated into the case, the number of work steps increases and the efficiency is poor.

Further, when a single core wire is used as the conductive material shown in FIG. 20, it is necessary to provide a single core wire wiring guide on the insulating plate, the shape is complicated, and a plurality of types of press contact terminals corresponding to various diameters are required. . In addition, the above-described press contact terminal 5 that can accommodate various diameters has a complicated structure, and since a plurality of terminal pieces 5A having different press contact portions 5a are arbitrarily combined, it is necessary to use a plurality of types of press contact terminals 5 in the end. And workability is poor.
Japanese Patent Laid-Open No. 9-190843

  SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has a circuit connection structure that is easy to work, can share components, does not require quality control, and can flexibly cope with design changes, and the circuit connection An object is to provide an electrical junction box having a structure.

In order to solve the above problem, the present invention provides a through hole in the insulating plate at a position where the conductive materials arranged on the insulating plate can be connected to each other, and a terminal material is disposed through the through hole so that the conductive material is provided. A circuit connection structure for connecting materials,
The terminal material protrudes at least two terminal piece portions in a horizontal direction from a shaft portion that passes through the through hole, and a contact portion protrudes from the terminal piece portion toward the conductive material,
A circuit connection structure characterized in that the conductive material is connected to each other by causing the contact portion of the terminal piece portion to press against the surface of the conductive material by rotating after passing the shaft portion of the terminal material through the through hole. Is provided.

The conductive material disposed on the insulating plate is a bus bar or a printed conductor on a printed board. The terminal material is formed by punching a conductive metal plate.
With the connection structure described above, the shaft part of the terminal material can be rotated after passing through the through-hole of the insulating plate (the board part of the printed circuit board), so soldering work is no longer required and circuit connection is simple. Can be achieved. Moreover, since the terminal piece portion of the terminal material is pressed and connected to the surface of the conductive material, it is possible to easily cope with a circuit change.

On the shaft portion of the terminal material, a pressing piece portion parallel to the terminal piece portion is protruded with an interval in the vertical direction, and the holding piece portion is opposed to the contact portion of the terminal piece portion. While the support point is protruding,
A through hole through which the holding piece portion is inserted is formed in the insulating plate in a state where the terminal piece portion is not in contact with the conductive material, and a concave portion that supports the tip of the shaft portion is formed in the insulating plate or the electric plate. A connection box case is provided,
By rotating the shaft portion supported by the concave portion, the contact portion of the terminal piece portion is pressed against the conductive material, and at the same time, the lower surface of the insulating plate on which the conductive material is placed is the support point of the pressing piece portion. It is set as the structure supported by a part.
By providing the pressing piece portion as described above, the pressure contact force of the contact portion of the terminal piece portion to the conductive material is increased, and the electrical connection reliability can be improved.

  It is preferable to project the terminal piece portion in the horizontal direction with an interval in the vertical direction on the shaft portion of the terminal material, and to connect the conductive material on the laminated insulating plate. In this case, by attaching the terminal material after assembling the insulating plate and the conductive material to the case, it becomes possible to connect the conductive materials of different layers laminated with the terminal material. There is no need to work, and workability is improved.

  While the conductive material is arranged on both the front and back surfaces of the insulating plate, at least two upper and lower terminal piece portions are protruded in the horizontal direction at intervals on the shaft portion of the terminal material, and the upper terminal piece The contact portion protrudes from the lower surface, the lower terminal piece protrudes the contact portion from the upper surface, and the contact portions of the upper and lower two terminal pieces are electrically conductive on both sides of the insulating plate. You may press-contact to a material. Also in this case, the conductive materials on the same surface side can be connected to each other depending on the arrangement position of the conductive materials.

  The terminal piece projecting in the horizontal direction from the shaft is two pieces projecting in the left-right direction, four pieces projecting at an interval of 90 degrees, or three pieces projecting in a T shape, The material is placed in a grid pattern on the insulating plate and consists of a bus bar or printed circuit board that is divided at each intersection, and the insulating plate or board at the dividing position is provided with through holes. The conductive material may be connected by assembling the terminal material at the intersection position.

  As described above, when the conductive material is placed in a lattice shape, and the protruding direction of the terminal piece portion of the terminal material is two pieces, three pieces, and four pieces as described above, circuit connection can be diversified, In addition, the terminal material can be shared, and the number of types of the terminal material can be reduced.

  A tab may be provided at the tip of the shaft portion. By providing the tab integrally with the shaft portion, it is possible to connect to an external circuit.

  Further, according to the present invention, the terminal material, the conductive material and the insulating plate constituting the circuit connection structure are accommodated in the case, and the terminal material is fitted at the position where the conductive material is connected by rotating the terminal material. An electrical junction box is provided in which a holding groove is provided on an insulating plate that accommodates the case inner surface or inside the case.

  As described above, according to the present invention, by inserting and rotating the shaft portion of the terminal material into the through hole, the two or more terminal piece portions projecting from the shaft portion are pressed against the conductive material, respectively. Since the connection structure is used, it is not necessary to produce various types of terminals corresponding to various wire diameters as in the case of the press contact terminal presented in the conventional example, and it is possible to promote common use of parts. Therefore, it is possible to improve the workability by reducing the number of different types of parts. Moreover, difficult quality control such as soldering or welding connection is not required, and design changes can be flexibly handled. In addition, the structure in which conductive material is arranged in a grid and the terminal material is assembled and connected at the intersection, the interval between each terminal piece projecting from the shaft can be made common. Pattern formation is possible.

  In addition, by forming the terminal strips in a plurality of stages at intervals in the vertical direction, the connection between the plurality of stacked conductive materials can be performed by attaching one terminal material, and the conductive material is placed in the case. Since the terminal material is attached and connected to the circuit after the assembly, the terminal installation work before the assembly becomes unnecessary, and the workability can be improved.

Embodiments of the present invention will be described with reference to the drawings.
1 to 6 show an electrical junction box 10 according to the first embodiment of the present invention. The electrical connection box 10 is connected to an automobile wire harness (not shown), and a plurality of bus bars 27 (27a, 27b...) Connected in a circuit with a terminal material 31A are caulked and fixed to the upper surface of the lower case 11. The insulating plate 20A is accommodated in the lowermost layer, and an insulating plate 20B having a conductive material disposed on the upper surface is laminated thereon, and the upper cover 12 is covered with the upper surface opening of the lower case 11, and the locking claws 14 of the upper cover 12 are covered. Is locked to the locked portion 13 of the lower case 11.

The terminal material 31A is stamped from a conductive metal plate, and as shown in FIG. 2, the terminal material 31A protrudes horizontally from the upper end of the shaft portion 32 to the left and right in the rod-shaped shaft portion 32 having a rectangular cross section. Two terminal piece portions 33a and 33b, and holding piece portions 35a and 35b protruded in parallel with the terminal piece portions 33a and 33b from the shaft portion 32 at a lower position spaced from the terminal piece portions 33a and 33b by a distance L1. It consists of. The contact portions 34a and 34b protrude downward from the lower surfaces of the terminal piece portions 33a and 33b, respectively, and the upper surfaces of the pressing piece portions 35a and 35b are supported so as to face the contact portions 34a and 34b. The point parts 36a and 36b are projected in a mountain shape.
The vertical distance L1 between the terminal piece portions 33a, 33b and the holding piece portions 35a, 35b is an insulating plate 20A in which the bus bar 27 is attached between the contact portions 34a, 34b and the support point portions 36a, 36b. Is a dimension that can be sandwiched between pressure contacts.
Further, the shaft portion 32 protrudes at a position lower than the pressing piece portions 35a and 35b, that is, in the insertion direction, and a narrow rotation pin 37 projects from the tip portion in the insertion direction. When the terminal material 31A is attached to the insulating plate 20A, the rotary pin 37 is formed to abut against the bottom inner wall 11a of the lower case 11.

  As shown in FIG. 3A, a bearing portion 16 that rotatably supports the rotating pin 37 of the terminal material 31A is provided in a required position on the bottom inner wall 11a of the lower case 11. Further, as shown in FIG. 3B, the required position on the lower surface side of the insulating plate 20B is a fitting groove 17 that fits into the terminal piece portions 33a and 33b only when the terminal material 31A is in the connection position. Is recessed.

  As shown in FIG. 4, in the insulating plate 20A, the bus bars 27a and 27b are arranged on the same straight line, and the through hole 22 for attaching the terminal material 31A to the position where the two bus bars 27a and 27b are connected. Has been drilled. The through-hole 22 is composed of a square-shaped rotation hole 22a and a rectangular insertion hole 22b formed by cutting away from the peripheral edge of the rotation hole 22a in opposite directions, and the bus bars 27a and 27b are connected to the rotation hole 22a. It is routed to the edge. Further, the insertion hole 22b is formed at a position where the pressing piece portions 35a and 35b can be inserted in a state where the terminal piece portions 33a and 33b of the terminal material 31A are arranged at positions not in contact with the bus bars 27a and 27b. In this embodiment, the bus bars 27a and 27b are formed in a direction perpendicular to the wiring direction. The inner dimension W5 of one side of the rotation hole 22a is such a dimension that the shaft part 32 of the terminal member 31A can be inserted and rotated, and the width from the contact part 34a of the terminal piece part 33a to the contact part 34b of the terminal piece part 33b. Smaller than W1. The insertion hole 22b is formed in a shape and size that allows the pressing piece portions 35a and 35b to be inserted and penetrated while the shaft portion 32 of the terminal material 31A is inserted perpendicularly to the rotation hole 22a. .

Next, the operation of connecting the bus bars 27a and 27b fixed on the insulating plate 20A using the terminal material 31A will be described.
First, after the insulating plate 20A to which the bus bars 27a, 27b... Are fixed is accommodated and fixed in the lower case 11, as shown in FIGS. 5 (A) and 5 (B), the terminal material is inserted into the through hole 22 formed in the insulating plate 20A. The shaft portion 32 of 31A and the pressing piece portions 35a and 35b are inserted. At this time, the shaft portion 32 is inserted vertically through the rotation hole 22a and the pressing pieces 35a and 35b are inserted through the insertion hole 22b, and the rotation pin 37 is accommodated in the bearing portion 16 of the lower case 11.

  Next, the shaft part 32 is rotated by holding the terminal piece parts 33a and 33b protruding from the upper surface of the insulating plate 20A so that the contact part 34a of the terminal piece part 33a is placed on the bus bar 27a and the contact part of the terminal piece part 33b. After 34b is positioned on the bus bar 27b and lightly pressed, the insulating plate 20B is fixed at a predetermined position and the terminal pieces 33a and 33b are fitted into the fitting grooves 17 as shown in FIG. Let

  At this time, since the terminal piece portions 33a and 33b and the holding piece portions 35a and 35b protrude in parallel with each other, when the terminal piece portions 33a and 33b are rotated, the holding piece portions 35a and 35b also become the lower surface of the insulating plate 20A. Rotate in the same direction on the side. Accordingly, the contact portion 34a of the terminal piece portion 33a can be brought into pressure contact with the surface of the bus bar 27a, and the contact portion 34b of the terminal piece portion 33b can be brought into pressure contact with the surface of the bus bar 27b, thereby connecting the bus bars 27a and 27b to each other. At the same time, the support point portions 36a and 36b of the pressing piece portions 35a and 35b support the insulating plate 20A from the lower surface side, and the pressure contact force of the contact portions 34a and 34b to the bus bars 27a and 27b can be maintained. Further, the terminal piece portions 33a and 33b can be positioned and fixed in the rotational direction and the vertical direction by fitting the terminal piece portions 33a and 33b into the fitting groove 17 provided in the lower surface side of the insulating plate 20B. This prevents the 31A from being out of the normal position and causing poor connection.

  According to the above circuit connection structure, conductive materials of various shapes and sizes can be connected using the terminal material 31A, so that the types of parts used are reduced, the workability is improved, and the cost can be reduced. it can. Furthermore, the connection work is simple by simply pushing the terminal material 31A into the through-hole 22 and rotating it. No special equipment is required, and quality control is not required unlike soldering or welding. Can also respond flexibly.

FIG. 6 shows a second embodiment of the present invention.
In the electrical junction box 10, the printed circuit board 21 in which the conductive paths 28 (28a, 28b...), 29 (29a, 29b...) Are arranged on both the front and back surfaces is accommodated in the uppermost layer, and another circuit body ( (Not shown) is partitioned by an insulating plate 30, and a circuit is formed by connecting the conductive paths 28 and 29 arranged in the same direction on the front and back surfaces of the substrate 21 using the terminal material 31B. Yes. Since other structures are the same as those in the first embodiment, the same reference numerals are given and description thereof is omitted.

The terminal material 31B has two terminal piece portions 33a and 33b protruding from the upper end of the shaft portion 32 in the horizontal direction to the left and right, and the shaft portion 32 at a lower position spaced from the terminal piece portions 33a and 33b by an interval L2. Accordingly, the two terminal piece portions 38a and 38b are provided to protrude in the horizontal direction from side to side. Contact portions 34a and 34b protrude downward from the lower surface of the upper terminal piece portions 33a and 33b, respectively, and contact portions 39a and 39b upward from the upper surface of the lower terminal piece portions 38a and 38b, respectively. It is protruding.
The vertical distance L2 between the upper terminal piece portions 33a and 33b and the lower terminal piece portions 38a and 38b is such that the conductive paths 28 and 29 are front and back between the contact portions 34a and 34b and the contact portions 39a and 39b. The dimensions are such that the printed circuit boards 21 attached to both sides are sandwiched in a pressure-contact manner.
Further, the shaft portion 32 protrudes in a position lower than the lower terminal piece portions 38a and 38b, that is, in the insertion direction, and a narrow rotation pin 37 projects from the tip end portion in the insertion direction. The rotary pin 37 is formed so as to abut against the insulating plate 30 when the terminal material 31B is attached to the substrate 21.

  At a required position on the upper surface side of the insulating plate 30, a bearing portion 18 that rotatably supports the rotating pin 37 of the terminal material 31 </ b> B is recessed. In addition, a fitting groove 19 that fits into the upper terminal piece portions 33a and 33b only when the terminal material 31B is in the connection position is recessed in a required position on the lower surface side of the upper cover 12.

The substrate 21 is provided with through holes 22 'at positions where the conductive paths 28a, 29a, ... are connected to each other. For example, the conductive paths 28a, 28b, 29a, 29b on both the front and back surfaces are formed using the terminal material 31B. Are connected to each other, like the first embodiment, the shaft portion 32 of the terminal material 31B and the lower terminal piece portions 38a and 38b are inserted into the through hole 22 ′ formed in the substrate 21.
Next, the shaft part 32 is rotated by holding the upper terminal piece parts 33a and 33b protruding on the upper surface of the substrate 21, and the contact part 34a of the terminal piece part 33a is placed on the conductive path 28a, and the terminal piece part 33b is provided. After the contact portion 34b is positioned on the conductive path 28b and press-contacted, the upper cover 12 is covered, and the upper terminal piece portions 33a and 33b are fitted into the fitting groove 19.
At the same time, the contact portion 39a of the lower terminal piece 38a is in pressure contact with the conductive path 29a and the contact portion 39b of the terminal piece 38b is in pressure contact with the conductive path 29b on the back side of the substrate 21. In one connection operation, not only the conductive paths on the same surface but also the conductive paths 28a, 28b, 29a, 29b arranged on both the front and back surfaces can be joint-connected, thereby further improving the workability of circuit connection. be able to.

  7 and 8 show a modification of the second embodiment. In the substrate 21, conductive paths 28 (28a, 28b...) Are arranged in the X direction on the upper surface side, and conductive paths 29 (29a, 29,. 29b ...) are arranged in a grid in the Y direction, through holes 22 "are formed at the required intersections of the conductive paths 28, 29 on the front and back sides, and the conductive paths 28, 29 on both sides are jointly connected by the terminal material 31B '. In other respects, the second embodiment is the same as the second embodiment, so the same reference numerals are given and the description thereof is omitted.

As shown in FIG. 7, the terminal material 31B ′ protrudes in a direction that intersects perpendicularly to the upper terminal piece portions 33a and 33b and the lower terminal piece portions 38a and 38b without protruding in parallel from the shaft portion 32. I am letting.
Further, as shown in FIG. 8, the through-hole 22 ″ formed in the substrate 21 includes a square-shaped rotary hole 22a ″ that penetrates the shaft portion 32 and an insertion hole 22b that passes through the lower terminal piece portions 38a and 38b. The insertion hole 22b "is a state in which the upper terminal pieces 33a and 33b and the lower terminal pieces 38a and 38b are arranged at positions where they do not contact the conductive paths 28 and 29, respectively. The lower terminal strips 38a, 38b are formed at positions where they can be inserted. Has been established.

  When the conductive paths 28a, 28b, 29a, 29b are connected using the terminal material 31B ′, the shaft portion 32 of the terminal material 31B ′ and the lower terminal piece portion are inserted into the through hole 22 ″ formed in the substrate 21. 38a and 38b are inserted, and the shaft part 32 is rotated by holding the upper terminal piece parts 33a and 33b protruding from the upper surface of the substrate 21, and the contact part 34a of the terminal piece part 33a is moved over the conductive path 28a. The contact portion 34b of the terminal piece portion 33b is positioned on the conductive path 28b and is in pressure contact with the contact portion 39a of the lower terminal piece portion 38a on the conductive path 29a. The contact portion 39b of the piece portion 38b is pressed against the conductive path 29b, so that even if the wiring directions of the conductive paths 28 and 29 on both the front and back surfaces are different, the terminal material 31B ′ can be used for joint connection with one terminal material. Can and times It is possible to improve the workability of the connection.

  FIGS. 9 and 10 show a third embodiment of the present invention, in which bus bars 27 (27a to 27d...) Arranged in a lattice pattern in the XY direction on the surface of the insulating plate 20A are connected to three pieces of terminal pieces 33a. It connects using 31 C of terminal materials provided with -33c. Since other points are the same as those of the first embodiment, the same reference numerals are given and description thereof is omitted.

  As shown in FIG. 9, the terminal material 31 </ b> C has three terminal piece portions 33 a to 33 c protruding in three directions in a horizontal direction from the upper end of the shaft portion 32 and in a T shape in a plan view. Further, pressing piece portions 35a to 35c are protruded in parallel with these terminal piece portions 33a to 33c from the shaft portion 32 at a lower position spaced from the terminal piece portions 33a to 33c by a distance L1. Contact portions 34a to 34c are projected downward on the lower surfaces of the terminal piece portions 33a to 33c, respectively, and supported on the upper surfaces of the pressing piece portions 35a to 35c so as to face the contact portions 34a to 34c. The point portions 36a to 36c are projected in a mountain shape.

As shown in FIG. 10, bus bars 27 a to 27 d... Are placed on the insulating plate 20 </ b> A in a lattice shape and divided at each intersection position, and a through hole 23 is formed in the insulating plate 20 </ b> A at a required dividing position. It is drilled. The through-hole 23 includes a square-shaped rotary hole 23a and three insertion holes 23b formed by cutting out from the peripheral edge of the rotary hole 23a in three directions. The bus bars 27a to 27d are located at the peripheral edge of the rotary hole 23a. Have been routed. Further, the three insertion holes 23b are formed at positions where the holding pieces 35a to 35c can be inserted in a state where the terminal pieces 33a to 33c are arranged at positions where they do not contact the bus bar 27. 27 in the direction of 45 degrees with respect to the XY direction in which the cables 27 are arranged, and spaced apart by 90 degrees.
The inner dimension L6 of one side of the rotation hole 23a is a dimension that the shaft part 32 of the terminal material 31C can rotate, and is smaller than the width W1 from the contact part 34a of the terminal piece part 33a to the contact part 34b of the terminal piece part 33b. Yes. The insertion hole 23b has a shape and size that allows the three pressing pieces 35a to 35c to be inserted vertically therethrough.

  When the bus bars 27a to 27d are connected using the terminal material 31C, the shaft portion 32 of the terminal material 31C and the lower pressing pieces 35a to 35c are inserted into the through holes 23 formed in the insulating plate 20A. To do. Thereafter, the lexical portion 32 is rotated by holding the upper terminal piece portions 33a to 33c protruding from the upper surface of the insulating plate 20A, and the terminal piece portion 33a is positioned on the bus bar 27a. At this time, the other terminal strips 33b and 33c are also located on the bus bars 27b and 27c, respectively, and can be brought into pressure contact with each other at the same time. Therefore, the required three bus bars 27a and 27b among the bus bars 27a to 27d arranged in a lattice shape. , 27c can be joint-connected by one connection operation of one terminal member 31C.

  Further, by arranging the bus bars 27 in a lattice shape, the angles of the four bus bars extending from the respective dividing positions are all at an interval of 90 degrees. Therefore, since the terminal material 31C can be used in common for all three of the four bus bars connected, the labor for selecting and using various terminal materials at the time of work is reduced, and workability is improved. At the same time, the cost can be reduced.

  FIG. 11 shows a modification of the third embodiment, and like the terminal material 31C ′ shown in the figure, terminal pieces projecting 180 degrees to the left and right from the shaft part 32 below the three terminal piece parts 33a to 33c. Only the two pressing pieces 35a and 35b parallel to the portions 33a and 33b may be projected.

  12 and 13 show a fourth embodiment of the present invention, in which bus bars 27 (27a to 27d...) Arranged in a lattice pattern on the surface of the insulating plate 20A are connected to four terminal piece portions 33a to 33d. The terminal material 31D provided is connected. Since the other points are the same as those of the third embodiment, the same reference numerals are given and description thereof is omitted.

  As shown in FIG. 12, the terminal material 31D includes a shaft portion 32 and four terminal piece portions 33a to 33d that protrude in four directions horizontally from the upper end of the shaft portion 32 at an interval of 90 degrees. And pressing piece portions 35a to 35d protruding in parallel with the terminal piece portions 33a to 33d from the shaft portion 32 at the lower position spaced from the terminal piece portions 33a to 33d by the distance L1. The contact portions 34a to 34d protrude downward from the lower surfaces of the terminal piece portions 33a to 33d, respectively, and the upper surfaces of the pressing piece portions 35a to 35c are supported to face the contact portions 34a to 34d. The point parts 36a to 36d are projected in a mountain shape.

As shown in FIGS. 13A and 13B, the bus bars 27a to 27d are placed in a lattice pattern on the insulating plate 20A, and are divided at each intersection position. A through hole 24 is formed in the plate 20A. The through-hole 24 includes a square-shaped rotation hole 24a and four insertion holes 24b formed by cutting out from the periphery of the rotation hole 24a in four directions. The bus bars 27a to 27d are connected to the periphery of the rotation hole 24a. It has been routed to the end. The four insertion holes 24b are formed at positions where the pressing pieces 35a to 35d can be inserted in a state where the terminal pieces 33a to 33d are arranged at positions where they do not contact the bus bar 27. The bus bars 27 are formed at intervals of 90 degrees in the direction of 45 degrees with respect to the XY direction in which the bus bars 27 are routed.
The inner dimension W7 of one side of the rotation hole 24a is a dimension that the shaft part 32 of the terminal material 31D can rotate, and is larger than the width W1 from the contact part 34a of the terminal piece part 33a to the contact part 34b of the terminal piece part 33b. The insertion hole 24b has a shape and size that allows the four pressing piece portions 35a to 35d to be inserted vertically therethrough.

When connecting the bus bars 27a to 27d using the terminal material 31D, the shaft portion 32 of the terminal material 31D and the lower pressing pieces 35a to 35d are inserted into the through holes 24 formed in the insulating plate 20A. After that, the lexical portion 32 is rotated by holding the upper terminal piece portions 33a to 33d on the upper surface of the insulating plate 20A, and the terminal piece portion 33a is positioned on the bus bar 27a. At this time, the other terminal pieces 33b, 33c, 33d are also located on the bus bars 27b, 27c, 27d, respectively, and can be brought into pressure contact with each other at the same time. Joint connection can be made by one connection operation of 31D.
Further, by arranging the bus bars 27 in a lattice shape, the angles of the four bus bars extending from the respective dividing positions are the same. Therefore, the terminal material 31D is provided at a location where the four bus bars contacting the dividing positions are connected to each other. Can be used in common.

  FIG. 14 shows a modification of the fourth embodiment described above, and a set that protrudes 180 degrees to the left and right from the shaft portion 32 below the four terminal piece portions 33a to 33d, like the illustrated terminal material 31D ′. Only the two holding piece portions 35a and 35b parallel to the terminal piece portions 33a and 33b may be projected.

  FIGS. 15 to 17 (A) and 17 (B) show a fifth embodiment of the present invention. In the lower case 11 of the electrical junction box 10, insulating plates 20A to 20C in which bus bars 27A, 27B, and 27C are crimped and fixed to the lower surface side. Are stacked and accommodated not only between bus bars on the same layer, but also between different levels of bus bars with terminal members 41A to 41C to form a circuit.

  A bus bar 27A is placed on the lower surface side of the insulating plate 20A, a bus bar 27B is placed on the lower surface side of the insulating plate 20B, and a bus bar 27C is placed on the lower surface side of the insulating plate 20C. The insulating plates 20A, 20B, and 20C are stacked in this order from the lower layer with vertical intervals L3 and L4, respectively. At this time, the bus bars 27 </ b> A to 27 </ b> C in each layer are stacked so that the wiring directions are the same.

  As shown in FIG. 16, the terminal member 41 </ b> A projects two terminal pieces 43 a, 43 a horizontally from the position near the tip of the shaft portion 42, that is, the lower position, and the terminal piece portion The middle terminal piece portions 43b and 43b protrude horizontally from the upper shaft portion 42 with the gap L3 from 43a and 43b, and further, the gap L4 is left from the middle piece piece 43b and 43b. The upper terminal pieces 43c and 43c are projected in the horizontal direction from side to side. These terminal piece portions 43a, 43a, 43b, 43b, 43c, 43c are all parallel in the protruding direction, but the protruding amount of the upper terminal piece portions 43c, 43c is maximized, and the terminal piece portions 43b, The protrusion amounts of 43b, 43a, and 43a are gradually reduced. Contact portions 44a, 44a, 44b, 44b, 44c, and 44c are projected in a mountain shape on the upper surfaces of the terminal pieces 43a, 43a, 43b, 43b, 43c, and 43c, respectively.

  Further, the shaft portion 42 is formed at a position lower than the lower terminal piece portions 43a, 43a, that is, in the insertion direction to form a shaft end portion 45, and the terminal material 41A is connected to the insulating plate 20A. The shaft tip 45 is formed so as to abut against the bottom inner wall 11a of the lower case 11 when attached to the lower case 11. Further, a tab 46 is vertically provided on the base end side, that is, the upper end of the shaft portion 42.

As shown in FIG. 17 (A), through holes 25 having the same shape are formed in the insulating plates 20A to 20C on the same vertical line at the locations where the bus bars 27A to 27C of each layer are connected to each other. A bearing portion 16 ′ for rotating and supporting the rotating pin 45 of the terminal material 41 </ b> A is recessed in the lower case 11 that hits the same vertical line as the hole 25.
As shown in FIG. 17 (B), the through hole 25 has a rectangular shape, and the inner dimension W8 of the short side 25a is such that the shaft part 42 of the terminal material 41A can rotate, and the lower terminal piece part. 43a, 43a is smaller than the width W2 between the contact portions 44a, 44a, and the inner dimension W9 of the long side 25b is larger than the maximum width W3 from end to end of the upper terminal piece portions 43c, 43c of the terminal material 41A. Is also large. Further, the through hole 25 is formed so that its long side 25b is arranged in a direction perpendicular to the arrangement direction of the bus bars 27A to 27C and protrudes into the non-arrangement region of the bus bars 27A to 27C.

When the bus bars 27A to 27C are connected using the terminals 41A, as shown in FIG. 17A, the insulating plates 20A to 20C on which the bus bars 27A to 27C are placed are stacked and fixed in the lower case 11. Thereafter, the shaft portion 42 and the terminal piece portion 43a of the terminal material 41A are sequentially formed from the through hole 25 formed in the upper insulating plate 20C to the through holes 25 of the middle insulating plate 20B and the lower insulating plate 20A. 43a, 43b, 43b, 43c, 43c are inserted, the shaft tip 45 is accommodated in the bearing portion 16 'of the lower case 11, and the lower terminal strips 43a, 43a are placed on the lower surface side of the lower insulating plate 20A. The middle terminal pieces 43b and 43b are positioned on the lower surface side of the insulating plate 20B, and the upper terminal piece portions 43c and 43c are positioned on the lower surface side of the upper insulating plate 20C. At this time, since the projecting amount from the shaft portion 42 is gradually reduced from the upper terminal pieces 43c, 43c toward the lower terminal pieces 43b, 43b, 43a, 43a, to the through holes 25 of the respective stages. Can be easily inserted.
Next, as shown in FIG. 17 (B), the tab 46 on the insulating plate 20C is held and rotated so that the bus bar 27C on the back surface side of the insulating plate 20C contacts the upper terminal pieces 43c and 43c. The parts 44c and 44c are brought into pressure contact with each other, and finally the upper cover 12 is put on as shown in FIG.

  As a result, the middle terminal strips 43b and 43b are pressed against the bus bars 27B and 27B of the middle insulating plate 20B, and the lower terminal strips 43a and 43a are simultaneously pressed against the bus bars 27A of the lower insulating plate 20A. In one connection operation of the two terminal members 41A, not only the conductive material of the same layer but also the conductive materials of different layers can be joint-connected. In addition, after the insulating plates 20A to 20C to which the bus bars 27A to 27C are fixed are accommodated in the lower case 11, the terminal material 41A can be attached and connected to the circuit from the upper surface side, so the terminal material 41A is installed in advance before housing the case. This reduces the assembly process and improves workability. Further, the terminal member 41A is rotated by passing the tab 46 of the terminal member 41A through the terminal hole 51 of the upper cover 12 and connecting it to the terminal (not shown) of the connector inserted into the connector housing 50. It can be positioned and fixed in both the vertical and vertical directions.

  Furthermore, in the present embodiment, in addition to the terminal member 41A, as shown in FIG. 15, the terminal member 41B for connecting the upper bus bar 27C and the lower bus bar 27A, the middle bus bar 27B, and the lower bus bar 27A are provided. Like the terminal material 41C to be connected, various circuit designs can be accommodated by changing the location where the terminal piece portions are formed or by producing a plurality of patterns in which the number of terminal piece portions is increased or decreased.

In addition, this invention is not limited to the said embodiment, Each said embodiment can be applied to any connection of a bus bar and a printed circuit board. Further, it is not always necessary to form two or more terminal piece portions projecting in the horizontal direction from the shaft portion, and it is not necessary to form one or more terminal piece portions at the same step or the number of terminal piece portions at each step. In addition, the protruding direction of the terminal piece at each stage may not be parallel.
Further, instead of the through holes 22, 22 ′, 22 ″, 25, a through hole 26 as shown in FIG. 18 may be used. That is, the through hole 26 has a circular rotation hole 26a for inserting the shaft portion. The insertion hole 26b is formed so as to be cut away from each other in the radial direction of the rotation hole 26a and toward the non-routing region of the conductive material 27.

It is a disassembled perspective view which shows the electrical junction box which concerns on 1st embodiment of this invention. It is an expansion perspective view of the terminal material shown in FIG. (A) is the principal part enlarged view of the bottom inner wall of the lower case shown in FIG. 1, (B) is the principal part enlarged view of the lower surface side of the upper insulating board shown in FIG. It is an expansion perspective view of the through-hole of the insulating board shown in FIG. It is a figure which shows the procedure of the connection operation | work using the terminal material shown in FIG. 2, (A) is a top view, (B) is a fragmentary sectional view. It is a fragmentary sectional view which shows the principal part of 2nd embodiment of this invention. It is an expansion perspective view of the terminal material which concerns on the modification of 2nd embodiment. It is a top view which shows the connection operation | work using the terminal material shown in FIG. It is a perspective view which shows the terminal material which concerns on 3rd embodiment of this invention. It is a top view which shows the connection work procedure using the terminal material shown in FIG. It is an expansion perspective view of the terminal material which concerns on the modification of 3rd embodiment. It is a perspective view which shows the terminal material which concerns on 4th embodiment of this invention. It is a top view which shows the connection work procedure using the terminal material shown in FIG. It is an expansion perspective view of the terminal material which concerns on the modification of 4th embodiment. It is a fragmentary sectional view showing a fifth embodiment of the present invention. It is an expansion perspective view which shows the terminal material shown in FIG. It is a figure which shows the procedure of the connection operation | work using the terminal material shown in FIG. 16, (A) is a fragmentary sectional view, (B) is a top view. It is a top view which shows the shape of another through-hole. It is a figure of a prior art example. It is a figure of another prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Electrical connection box 11 Lower case 12 Upper cover 16, 16 ', 18 Bearing part 17, 19 Fitting groove 20A, 20B, 20C Insulation board 21 Printed circuit board 22-26, 22', 22 "Through-hole 27 (27a, 27b) 27A to 27C Bus bars 28 and 29 Conductive paths 31A to 31D, 31B 'to 31D', 41A to 41D Terminal material 32, 42 Shaft portions 33a to 33d, 38a, 38b Terminal piece portions 35a to 35d Holding piece portions

Claims (7)

A circuit connection structure in which a through hole is provided in the insulating plate at a position where the conductive materials arranged on the insulating plate are connectable, and a terminal material is disposed through the through hole to connect the conductive material,
The terminal material protrudes at least two terminal piece portions in a horizontal direction from a shaft portion that passes through the through hole, and a contact portion protrudes from the terminal piece portion toward the conductive material,
A circuit connection structure characterized in that the conductive material is connected to each other by causing the contact portion of the terminal piece portion to press against the surface of the conductive material by rotating after passing the shaft portion of the terminal material through the through hole. . On the shaft portion of the terminal material, a pressing piece portion parallel to the terminal piece portion is protruded with an interval in the vertical direction, and the holding piece portion is opposed to the contact portion of the terminal piece portion. While the support point is protruding,
A through hole through which the holding piece portion is inserted is formed in the insulating plate in a state where the terminal piece portion is not in contact with the conductive material, and a concave portion that supports the tip of the shaft portion is formed in the insulating plate or the electric plate. A connection box case is provided,
By rotating the shaft portion supported by the concave portion, the contact portion of the terminal piece portion is pressed against the conductive material, and at the same time, the lower surface of the insulating plate on which the conductive material is placed is the support point of the pressing piece portion. The circuit connection structure according to claim 1, wherein the circuit connection structure is supported by the portion.   3. The conductive material on the laminated insulating plate is connected to the shaft portion of the terminal material by protruding the terminal piece portion in the horizontal direction with a space in the vertical direction. The circuit connection structure described.   While the conductive material is arranged on both the front and back surfaces of the insulating plate, at least two upper and lower terminal piece portions are protruded in the horizontal direction at intervals on the shaft portion of the terminal material, and the upper terminal piece The contact portion protrudes from the lower surface, the lower terminal piece protrudes the contact portion from the upper surface, and the contact portions of the upper and lower two terminal pieces are electrically conductive on both sides of the insulating plate. The circuit connection structure according to any one of claims 1 to 3, wherein the circuit connection structure is pressed against the material. The terminal piece protruding in the horizontal direction from the shaft is composed of two pieces protruding in the left-right direction, four pieces protruding at intervals of 90 degrees, or three pieces protruding in a T shape,
The conductive material is placed in a grid pattern on the insulating plate and is composed of a conductive path of a bus bar or a printed circuit board that is divided at each intersection position, and a through hole is provided in the insulating plate or the substrate at the divided position. The circuit connection structure according to any one of claims 1 to 4, wherein the conductive material is connected by assembling the terminal material at an arbitrary intersection point position.   The circuit connection structure according to any one of claims 1 to 5, wherein a tab is provided at a tip of the shaft portion. The terminal material, the conductive material, and the insulating plate constituting the circuit connection structure according to any one of claims 1 to 6, are housed in a case,
An electrical connection box in which a holding groove for fitting the terminal material is provided on the inner surface of the case or in the case inside the case at a position where the conductive material is connected by rotating the terminal material.

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