JP3281566B2 - Electrical junction box - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric connection box in which a circuit forming body on which a predetermined electric circuit is formed is accommodated in a case.

[0002]

2. Description of the Related Art FIG. 3 shows an example of a conventional product. The electric junction box A is described in Japanese Utility Model Laid-Open No. 4-61417, and includes a laminated plate B in which two insulating plates B1 and B2 are stacked and a two-layer insulating plate B1 and B2 are stacked. A plurality of busbars C are disposed on both upper and lower surfaces of the electronic device, and a predetermined electric circuit is formed. The circuit formed body D on which the predetermined electric circuit is formed is divided into an upper case E1, a lower case E2, and a side case. It is housed in a case E made of E3.

[0003]

In the electric junction box A, the bus bar terminals C1 need to protrude from the laminated board B in accordance with a predetermined connector pitch. Therefore, the end of the bus bar C like the step terminal C2 is required. It is necessary to bend the portion of the bus bar C or to raise the end of the bus bar C from the laminated plate B as in the case of the standing terminal C 3 shown in FIG. 4, and there is a problem that a plurality of bus bars C having a complicated shape are required. Was.

Further, in the electric junction box A, as shown in FIG. 5, in order to hold the stepped terminal C2 of the bus bar C bent at a predetermined connector pitch, two insulating plates B1,
There is also a problem that the structures of the insulating plates B1, B2, and B3 are complicated by engaging the B2 with each other and further stacking the auxiliary insulating plate B3 on the laminated plate B.

Further, in the electric connection box A, when the number of electric circuits is increased, the number of the insulating plates B1 and B2 is increased, and there is a problem that the electric connection box A itself becomes thick.

Therefore, in the present invention, it is not necessary to use a plurality of bus bars having a complicated shape or an insulating plate having a complicated structure.
An object of the present invention is to provide an electric junction box whose thickness does not increase even if the number of electric circuits is increased.

[0007]

As a means for solving the above-mentioned problem, as a means for solving the above-mentioned problem, in an electric connection box in which a circuit formed body on which a predetermined electric circuit is formed is accommodated in a case composed of an upper case and a lower case, And a wiring sheet made of an electrically insulating material, an electric wire wired to the wiring sheet, a connection terminal connected to the electric wire, and an electric connection between the electric wire and the outside, and the upper case and the lower part. And a connection part sandwiched between the case and the lower case.
A housing groove for storing the power supply busbar is provided, and the connection box is thin.
It is characterized in that the Ku configuration.

According to the first aspect of the present invention, the bus bar that forms the circuit forming body is only the bus bar for power supply. In addition to the bus bar for power supply, the bus bar that forms the circuit forming body includes a wiring sheet made of an electrically insulating material, An electric wire to be wired on the wiring sheet ;
A connection terminal connected to the electric wire, and a connection part for electrically connecting the electric wire to the outside, there is no need to use a bus bar having a complicated shape other than the power supply bus bar. Also, there is no need for an insulating plate having a complicated structure for holding the ends of the plurality of bus bars at a predetermined connector pitch.

Further, according to the first aspect of the present invention, even if the number of electric circuits is increased, only the electric wires laid on the wiring sheet become complicated, and the thickness of the electric connection box itself does not increase.

Further, according to the first aspect of the present invention, the electric wire is connected to the outside.
And the upper case and the lower case.
Since the connecting parts sandwiched between the case and the case are used for the circuit forming body, the parts can be shared by using this connecting part for another type of circuit forming body.

According to a second aspect of the present invention, there is provided the electrical junction box according to the first aspect, wherein the upper case, the lower case, and the circuit
The method is characterized in that the mounting directions of the formed body are all set in the thickness direction of the case .

Therefore, according to the second aspect of the present invention, it is easy to assemble the case and the circuit body in the production line.

According to a third aspect of the present invention, there is provided the electrical junction box according to the second aspect, wherein the upper case or the lower case is assembled.
A storage part for storing the connection component is formed on the front side in the cutting direction.
Characterized in that it was.

Therefore, according to the third aspect of the present invention, it is easy to assemble the power supply bus bar and the connecting parts to the upper case or the lower case. And the circuit forming body are further easily assembled.

According to a fourth aspect of the present invention, in the electric connection box according to the third aspect, an engaging portion for holding the connecting component is formed in the housing portion, and the engaging portion is engaged with the engaging portion. An engaged portion is formed on the connection component.

According to the fourth aspect of the present invention, the engaged portion of the connection component is engaged with the engagement portion of the housing portion of the upper case or the lower case, and the connection component is held by the upper case or the lower case. In this state, the components of the circuit forming body other than the connection components can be assembled to the held upper case or lower case.

According to the fourth aspect of the present invention, it is easy to assemble the circuit forming body into the upper case or the lower case. As a result, the case and the circuit forming body in the manufacturing line are different from the third aspect. Is easier to assemble.

The invention according to claim 5 is the electric connection box according to claim 4, wherein the engaging portion is an engaging groove formed in the housing portion, and the engaged portion is the connection portion. It is an engaging projection formed on a part.

According to the fifth aspect of the present invention, the connecting component is held in the upper case or the lower case by engaging the engaging projection of the connecting component with the engaging groove of the receiving portion of the upper case or the lower case. In this state, the components of the circuit forming body other than the connection components can be assembled to the held upper case or lower case.

Therefore, according to the fifth aspect of the present invention, as in the fourth aspect of the present invention, it is easy to assemble the circuit forming body to the upper case or the lower case, and as a result, as compared with the third aspect of the present invention. Further, assembling of the case and the circuit forming body in the production line is further facilitated.

[0021]

FIG. 1 shows an example of an embodiment in which the inventions of claims 1 to 5 are implemented together. The electric connection box 1 includes a power busbar 2 and a wiring sheet 3.
, A wire 4 for wiring, and a connection terminal 5 connected to the wire 4
And a first connector 6, a second connector 7, and a fuse box 8 for electrically connecting to the outside, a predetermined electric circuit is formed, and a circuit forming body 9 on which the predetermined electric circuit is formed is formed. , Are housed in a case 10 composed of an upper case 11 and a lower case 12.

The power bus bar 2 has one end serving as a bus bar terminal 2a for power supply, and the other end formed with four fuse terminals 2b for resiliently holding one terminal of the fuse 20 in parallel. , Two upstanding terminals 2c are erected,
A terminal holding portion for elastically holding the relay terminal is formed at the tip of each of the upstanding terminals 2c.

The wiring sheet 3 is for wiring the electric wires 4 on the rear surface in the mounting direction, and is made of an electrically insulating material.
Insertion holes 3a through which the upright terminals 2c of the power busbar 2, the terminals 6b of the first connector 6, the terminals 7b of the second connector 7, and the terminals 8b of the fuse box 8 are respectively inserted are provided at predetermined positions.

The electric wire 4 is inserted into the predetermined insertion hole 3 of the wiring sheet 3.
a terminal 6b of the first connector 6, a terminal 7b of the second connector 7, a terminal 8b of the fuse box 8, and a connection terminal 5 to be described later that protrude from the terminal 6a. , 7 b, 8 b, 5.

The connection terminal 5 has a pressure contact portion (see FIG. 2) for press-connecting the electric wire 4 at one end, and a terminal holding portion 5a for resiliently holding the relay terminal at the other end. Housing 11 for relay mounting part of case 11
b, together with the housing 11b and the upstanding terminal 2c of the power busbar 2, form a relay mounting portion of the electrical junction box 1.

The first connector 6 has four terminals 6b protruding from the rear end surface of the housing 6a, and a press-contact portion (see FIG. 2) for press-connecting the electric wire 4 is formed at the tip of each terminal 6b. At the rear end of the housing 6a, an engaging projection 6c is provided over the entire periphery of the housing 6a so as to protrude in a direction orthogonal to the assembling direction, and is provided for a first connector 6 provided through a lower case 12 to be described later. The first connector 6 of the electric connection box 1 is mounted by being housed in the housing portion 12b and being engaged with the engagement groove 12c for the first connector 6 formed around the housing portion 12b. Form a part.

In the second connector 7, six terminals 7b projecting from the lower surface of the housing 7a are bent rearward in the mounting direction, and a press-contact portion (FIG. 2) for press-connecting the electric wire 4 is provided at the tip of each terminal 7b. On the both sides of the housing 7a, protruding engagement protrusions 7c extending in the assembling direction are stored in a storage portion 12d for the second connector 7 formed in the lower case 12, which will be described later. The storage unit 12
The engagement protrusion 7c is engaged with the engagement groove 12e for the second connector 6 formed at the position d, thereby forming the second connector mounting portion of the electric connection box 1.

In the fuse box 8, three terminals 8b protruding from the left side surface of the housing 8a are bent rearward in the mounting direction, and a tip portion of each terminal 8b presses and connects the electric wire 4 (FIG. 2). Is formed, and the housing 8 is formed.
a engaging projections 8c extending in the mounting direction
Are provided in a housing portion 12f for the fuse box 8 formed in the lower case 12, which will be described later, and are engaged with the engaging grooves 12g for the fuse box 8 formed in the housing portion 12f. 8c is engaged with the fuse terminal 2b of the power busbar 2 to form a fuse mounting portion of the electrical junction box 1.

The upper case 11 has a box shape made of a synthetic resin. A housing 11b for a relay mounting portion is formed on a rear surface 11a in the mounting direction. A part 11d of a housing for a power supply cable mounting portion is formed on a left side surface 11c in the mounting direction. A part 11d of the housing forms a power supply cable mounting portion together with a bus bar terminal 2a of the power supply bus bar 2 and another portion 12i of a housing for a power supply cable mounting portion of the lower case 12, which will be described later.

The lower case 12 is also of a box shape made of synthetic resin, and a storage portion 12b for the first connector 6 is provided at a lower portion of the front surface 12a in the mounting direction, and a first portion is formed around the entire circumference of the storage portion 12b. An engagement groove 12c for the connector 6 is recessed, a storage portion 12d for the second connector 7 is recessed at the upper end, and an engagement groove 1 for the second connector 7 is provided at both left and right ends of the storage portion 12d.
2e, a recess 12f for the fuse box 8 is recessed at the right end, and an engagement groove 12g for the fuse box 8 is recessed at the upper and lower ends of the recess 12f.

Also, on the front surface 12a of the lower case 12,
A housing 12h for the bus bar terminal 2a of the power bus bar 2 is recessed at the left end, and a part of the housing 12h protrudes from the side surface of the lower case 12 to form a housing for the power supply cable mounting portion of the upper case 11. The other part 12i of the housing which forms the housing for the power supply cable mounting part together with the part 11d is formed, and the storage part 12h for the bus bar terminal 2a and the storage part 12f for the fuse box 8 are connected to form a housing for the power supply. An accommodating groove 12j for accommodating the bus bar 2 is recessed.

FIG. 2 shows a press-contact portion for press-connecting the electric wire 4 at the connection terminal 5, the terminal 6b of the first connector 6, the terminal 7b of the second connector 7, and the terminal 8b of the fuse box 8. This press contact portion is connected to each terminal 5, 6b, 7
b, a slot 30 recessed from the tip of 8b,
The electric wire 4 is press-fitted into the slot 30, the insulating coating of the electric wire 4 is broken, and the exposed conductor portion of the electric wire 4 is connected to each terminal 5, 6b, 7b, 8b.

To assemble the electric junction box 1 described above, first, the lower case 12 is placed on a table with its front surface 12a facing up, and the power busbar 2 is arranged in the accommodation groove 12j of the lower case 12. Set up.

Next, the engaging protrusion 6c of the first connector 6 is engaged with the engaging groove 12c of the storage portion 12b for the first connector 6 of the lower case 12, and the first connector 6 is inserted into the storage portion 12b. Is stored and held, and the second connector 7 is inserted into the engagement groove 12 e of the storage portion 12 d for the second connector 7 of the lower case 12.
The engaging projection 7c is engaged with the storage portion 12e so that the seventh
The connector 7 is housed and held, and the engaging protrusion 8c of the fuse box 8 is engaged with the engaging groove 12g of the housing 12f for the fuse box 8 of the lower case 12, and the fuse box 8 is fitted into the housing 12f. Is stored and held.

Subsequently, the rising terminal 2 of the power busbar 2
c, the terminal 6b of the first connector 6, the terminal 7b of the second connector 7, and the terminal 8b of the fuse box 8 are connected to the wiring sheet 3.
The wiring sheet 3 is placed on the front surface 12a of the lower case 12, and is placed in each terminal 2c, 6b, 7b, 8b and at a predetermined position so as to form a predetermined electric circuit. The electric wires 4 are wired between the arranged connection terminals 5, and the terminals 2 c, 6 b, 7 b, 8 b and the connection terminals 5 are connected to the electric wires 4 by pressure welding.

In this way, a circuit forming body 9 is formed by the power busbar 2, the wiring sheet 3, the electric wire 4, the connection terminal 5, the first and second connectors 6, 7 and the fuse box 8, and The circuit case 9 is accommodated in the case 10 by covering the case 12 with the upper case 11, and the electric junction box 1 is assembled.

Accordingly, in the electric connection box 1, the power supply bus bar 2, the wiring sheet 3, the electric wire 4, the connection terminal 5, the first connector 6, the second connector 7, the fuse box 8 and the lower case 12 of the upper case 11 are connected. Are all set in the thickness direction of the case 10.

In the electric junction box 1 described above, the bus bar forming the circuit forming body 9 is only the bus bar 2 for the power supply. Since the electric wire 4, the connection terminal 5, the first and second connectors 6, 7, and the fuse box 8 are used, there is no need to use a bus bar having a complicated shape other than the power bus bar 2. There is no need for an insulating plate having a complicated structure for holding the ends at a predetermined connector pitch.

In the electric connection box 1, even if the number of electric circuits is increased, only the wiring of the electric wires 4 to be wired on the wiring sheet 3 becomes complicated, but the thickness of the electric connection box 1 itself does not increase.

Further, in the electric junction box 1, the electric wire 4 is
And the upper case 11 and
As a connection component sandwiched between the lower case 12 and the first
Since the first and second connectors 6, 7 and the fuse box 8 are used for the circuit forming body 9, the first and second connectors 6, 7 and the fuse box 8 are used for another type of circuit forming body. By using also, commonality of parts can be measured.

By the way, in the conventional product shown in FIG. 3, the case E is composed of the upper case E1, the lower case E2, and the side case E3. After assembling the lower case E2 and the circuit forming body D in the thickness direction of the case E, it is necessary to further assemble the side case E3 from the side.

On the other hand, in the electric junction box 1, the case 1
0 is formed by the upper case 11 and the lower case 12, and the mounting directions of the upper case 11, the lower case 12, and the circuit forming body 9 are all set to the thickness direction of the case 10, so that the upper case 11 and the lower case The efficiency of the assembling work between the circuit 12 and the circuit body 9 can be improved.

In the electric junction box 1, the lower case 12
On the front surface 12a in the mounting direction, a housing groove for housing the power bus bar 2 is recessed, and a housing portion 12b for the first connector 6, a housing portion 12d for the second connector 7, and a housing portion for the fuse box 8 are provided. Since the 12 f is formed, the power busbar 2, the first connector 6, the second connector 7, and the fuse box 8 can be easily assembled to the lower case 12, and as a result, the electric connection box 1 can be easily assembled in a manufacturing line. become.

In the electric junction box 1, the lower case 12
An engagement groove 12c for the first connector 6 is formed in the storage portion 12b for the first connector 6, and an engagement protrusion 6c that engages with the engagement groove 12c is formed in the first connector 6, and the lower case is formed. 1
The second connector 7 is stored in the storage section 12d for the second
The second connector 7 has an engaging projection 7c for engaging with the engaging groove 12e, and the fuse box 8 is stored in the housing 12f for the fuse box 8 in the lower case 12. Forming an engagement groove 12g,
Since the engaging projection 8c that engages with the g is formed in the fuse box 8, the first connector 6 is housed and held in the housing 12b for the first connector 6, and is held in the housing 12d for the second connector 7. The second connector 7 can be housed and held, and the fuse box 8 can be housed and held in the housing section 12f for the fuse box 8.

Therefore, in the electric connection box 1, the wiring sheet 3 and the electric wire 4 are connected to each other with the power busbar 2, the first and second connectors 6 and 7 and the fuse box 8 held in the lower case 12. The connection terminals 5 can be assembled to the lower sheet 12, and as a result, the circuit forming body 9 can be easily assembled to the lower case 12, and the electric connection box 1 can be efficiently assembled in the production line. it can.

[0046]

According to the first aspect of the present invention, the bus bar forming the circuit forming body is only the bus bar for power supply, and the wiring forming sheet other than the bus bar for power supply is a wiring sheet made of an electrically insulating material. And an electric wire wired to the wiring sheet, a connection terminal connected to the electric wire, and the electric wire and the outside.
To the upper case and the lower case.
Because it is a connecting part sandwiched between the bus bar and the bus bar for power supply, it is not necessary to use a bus bar of complicated shape other than the bus bar for power supply, and it is also complicated to hold the ends of multiple bus bars at a predetermined connector pitch. There is no need for an insulating plate with a simple structure.

According to the first aspect of the present invention, even if the number of electric circuits is increased, only the electric wires laid on the wiring sheet become complicated, and the thickness of the electric connection box itself does not increase.

Further, according to the first aspect of the present invention, the electric wire and the outer
And the upper case and lower case.
Since the connecting parts sandwiched between the components are used for the circuit forming body, the parts can be shared by using the connecting parts for other types of circuit forming bodies.

According to the second aspect of the present invention, the case is formed by the upper case and the lower case, and the mounting directions of the upper case, the lower case, and the circuit forming body are all in the thickness direction of the case. And the circuit forming body can be easily assembled.

According to the third aspect of the present invention, assembling of the power supply bus bar and the connecting parts to the upper case or the lower case becomes easy, so that the case and the circuit forming body in the manufacturing line are different from the second aspect of the invention. Is easier to assemble.

According to the fourth aspect of the present invention, in a state where the connecting parts are held in the upper case or the lower case, the components of the circuit forming body other than the connecting parts are assembled to the held upper case or the lower case. As a result, assembling of the circuit forming body to the upper case or the lower case becomes easy, and as a result, assembling of the case and the circuit forming body in the production line becomes easier as compared with the invention according to claim 3. .

According to the fifth aspect of the present invention, similarly to the fourth aspect of the invention, in a state where the connection parts are held in the upper case or the lower case, the upper case or the lower case held in the upper case or the lower case is connected to the other parts. Since the components of the circuit forming body can be assembled, the circuit forming body can be easily assembled to the upper case or the lower case. As a result, the case and the circuit forming in the manufacturing line can be compared with the invention according to claim 3. Assembling with the body becomes easier.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an example of an embodiment in which the inventions of claims 1 to 5 are implemented together.

FIG. 2 is an enlarged perspective view showing a pressure contact portion of a terminal shown in FIG.

FIG. 3 is an exploded perspective view showing an example of a conventional product.

FIG. 4 is a perspective view of the circuit forming body in FIG. 3 as viewed from the back.

FIG. 5 is a sectional view taken along line XX of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electric connection box 2 Bus bar for power supply 3 Wiring sheet 4 Electric wire 5 Connection terminal 6 First connector (connection part) 6c, 7c, 8c Engagement convex part (engaged part) 7 Second connector (connection part) 8 Fuse Box (connecting parts) 9 Circuit forming body 10 Case 11 Upper case 12 Lower case 12a Front surface 12b, 12d, 12f Storage parts 12c, 12e, 12g Engagement groove (engagement part)

Claims (5)

(57) [Claims] 1. An electric connection box in which a circuit formed body on which a predetermined electric circuit is formed is accommodated in a case composed of an upper case and a lower case, a power busbar, a wiring sheet made of an electrically insulating material, and a wiring. An electric wire to be wired to the sheet, a connection terminal connected to the electric wire, and a connection component for electrically connecting the electric wire and the outside and being sandwiched between the upper case and the lower case. In front of the lower case
A housing groove for storing the power supply busbar is provided, and the connection box is thin.
An electrical junction box characterized by a well-structured configuration . 2. A electrical connection box according to claim 1, before
Assembling the upper case, the lower case, and the circuit forming body
An electrical junction box , wherein all directions are the thickness direction of the case . 3. An electrical connection box according to claim 2, prior
On the front of the upper case or lower case in the mounting direction,
An electric connection box, wherein a storage portion for storing the connection component is formed . 4. The electric connection box according to claim 3, wherein an engagement portion for holding the connection component is formed in the storage portion, and an engaged portion engaged with the engagement portion is provided. An electric connection box formed on the connection component. 5. The electrical connection box according to claim 4, wherein the engaging portion is an engaging groove formed in the storage portion, and the engaged portion is formed in the connection component. An electric connection box characterized by an engaging projection.