WO2017082018A1

WO2017082018A1 - Electrical connection box

Info

Publication number: WO2017082018A1
Application number: PCT/JP2016/081249
Authority: WO
Inventors: 慶一佐々木
Original assignee: 住友電装株式会社
Priority date: 2015-11-13
Filing date: 2016-10-21
Publication date: 2017-05-18
Also published as: JP2017093198A

Abstract

An electrical connection box 10 mounted in a vehicle is provided with: an accommodating portion 30 in which an opening portion 31 through which an end portion of an electric wire W can be inserted is formed, and in which a terminal 26 capable of being connected to the end portion of the electric wire W is accommodated; and a lid portion 40 which has a linked portion 46 linked rotatably to a linking portion 37 provided on an upper side of the accommodating portion 30, and which is capable of being opened from a closed position covering the opening portion 31 by being rotated. At least one of the linking portion 37 and the linked portion 46 is provided with a position holding portion 39B which, in a state in which the lid portion 40 is open and the electric wire W can be inserted through the opening portion 31, holds the position of the lid portion 40 by increasing the contact pressure with the other of the linking portion 37 and the linked portion 46.

Description

Electrical connection box

SUMMARY Disclosed herein are techniques related to electrical junction boxes.

DESCRIPTION OF RELATED ART Conventionally, the electrical connection box with which the terminal connected to the electric wire side terminal of the terminal part of an electric wire was covered by the cover is known. The electrical connection box of Patent Document 1 includes a base attached to the opening of the case covering the bus bar, and a lid covering the base. When the lid is bent toward the base with the thin hinge at the lower end as an axis, the locking claws of the lid are locked to the lock frame of the base, and the lid is closed. When attaching the power supply line terminal, turn the lid downward about the thin hinge at the lower end to expose the bus bar, and bolt the bolt terminal of the power supply line terminal to the bus bar, and then cover the lid Close.

Unexamined-Japanese-Patent No. 2006-174657

By the way, in the configuration in which the lid is opened by pivoting about the lower end as in Patent Document 1, the weight of the lid holds the lid in the open state, so when attaching the power supply wire terminal Although there is an advantage that the operator does not need to support the lid, when the electrical junction box is mounted on a vehicle, the space under the electrical junction box tends to be small, so the lid is opened. There is concern that problems will occur. Therefore, if the lid portion is pivoted about the upper end side instead of using the lower end side as an axis, the opening of the lid portion does not easily occur even if the space on the lower side of the electric connection box is small. However, in the configuration in which the lid is rotated about the upper end side, when the lid is open, the position of the lid can not be maintained unless the worker supports the lid, so the electric wire There is a problem that the attachment work efficiency of the terminal part of is not good.

The technology described in the present specification is completed based on the above circumstances, and it is an object of the present invention to improve the attachment workability of the end portion of the electric wire in the electric connection box mounted on the vehicle. I assume.

In the technique described in the present specification, an opening portion through which the end portion of the wire can be inserted is formed, and a storage portion in which a terminal connectable to the end portion of the wire is stored, and provided on the upper side of the storage portion An electric connection box mounted on a vehicle, comprising: a connected part rotatably connected to the connected part, and a cover which can be opened by turning from a closed position covering the opening; And at least one of the connection portion and the connection portion has a high contact pressure to the other side when the electric wire can be inserted into the opening portion with the lid portion opened. And a position holding unit for holding the position of the lid.

According to this configuration, the to-be-connected portion of the lid is rotatably connected to the connecting portion provided on the upper side of the housing, so for example, the lid is provided on the lower side of the housing Compared with the structure which rotates with respect to the connection part, an electric connection box can be mounted even in the vehicle which can not provide the space allowance below the electric connection box. Here, if the connected part of the lid is rotatably connected to the connecting part provided on the upper side of the housing, the lid may have its own weight when connecting the end of the electric wire. There is a problem that the operation of attaching the end portion of the electric wire is not good because it is turned to the closing side. On the other hand, according to the above configuration, when the electric wire can be inserted through the opening in a state in which the lid is opened by the position holding part of at least one of the coupled part and the connecting part, The contact pressure is increased to maintain the position of the lid. As a result, even if the operator does not support the lid portion, the mounting operation of the end portion of the wire can be performed, so that the mounting workability of the end portion of the wire can be improved. Therefore, the attachment workability of the terminal part of an electric wire can be improved about the electrical connection box mounted in a vehicle.

The following aspects are preferable as an embodiment of the technology described in this specification.
When in the closed position, the position holding unit increases the contact pressure to the other side to hold the position of the lid.
In this way, the position of the lid is maintained not only when the lid is in the open state but also when the lid is in the closed position, so when the lid is in the closed position, vibration of the vehicle or the like occurs. It is possible to suppress the generation of abnormal noise that may occur.

The connecting portion has a cylindrical shaft portion, the connected portion has a concave portion slidingly contacting the outer periphery of the shaft portion, and the position holding portion protrudes from the outer peripheral surface of the shaft portion. .
In this case, the position holding portion is provided on the outer peripheral surface of the shaft portion, so that the formation of the position holding portion is facilitated. Moreover, compared with the structure which forms a position holding | maintenance part in the cover part side, it can suppress that a position holding | maintenance part becomes an obstacle of attachment at the time of attachment of a cover part.

The plurality of connected parts are provided, and the position holding part generates a contact pressure with one of the connected parts to hold the lid in an open state, and the other one of the connected parts. A contact pressure is generated between the connector and the connector to hold the lid in the closed position.

According to the technology described in the present specification, it is possible to improve the attachment workability of the end portion of the electric wire in the electric connection box mounted on the vehicle.

The perspective view which shows the electric connection box in which the cover part of Embodiment 1 was arranged in the closed position. The perspective view of the electric connection box which shows the state which opened the lid to a predetermined angle Front view showing the electrical connection box with the lid in the closed position AA sectional view of FIG. 3 The figure which expanded a part of FIG. 4 The figure which shows the state which open | released the cover part to the angle which the position holding part of a connection part will not contact | abut to a to-be-connected part by the position of the AA cross section of FIG. The figure which expanded a part of FIG. 6 The figure which showed the state which open | released the cover part to the angle of 90 degree from the closed position by the position of the cross section of AA of FIG. The figure which expanded a part of FIG. 8 The figure which shows the state which open | released the cover part to the angle which the position holding | maintenance part of a connection part contact | abuts to a to-be-connected part by the position of the BB cross section of FIG. The figure which expanded a part of FIG. 10 The figure which shows the state which open | released the lid | cover part to the predetermined angle with respect to the closing position by the position of the BB cross section of FIG. The figure which expanded a part of FIG. 12

First Embodiment
The first embodiment will be described with reference to FIGS. 1 to 13.
The electric connection box 10 is disposed in a power supply path between a power supply such as a battery of a vehicle such as an electric vehicle or a hybrid vehicle and a load including an on-vehicle electrical component such as a lamp or a drive motor. And can be used for inverters and the like. Hereinafter, the X direction will be described as the front, the Y direction as the right, and the Z direction as the upper.

(Electrical connection box 10)
As shown in FIG. 1, the electrical connection box 10 includes a main body portion 11 and a mounting portion 25 to which the end portion of the electric wire W is attached, and as shown in FIG. The circuit board 12 and the frame 18 are overlapped, and the main body portion 11 is covered by a main body cover 21.

The circuit board 12 is accommodated in the main body 11. The circuit board 12 is configured such that a printed circuit board 13 in which a conductive path made of copper foil or the like is formed on an insulating plate by a printed wiring technique and a bus bar 14 made of a metal plate material overlap each other. The bus bar 14 is electrically connected to the pair of terminals 26 housed in the mounting portion 25 and receives supply of power from the terminal 26 side. Electronic components such as FETs (Field Effect Transistors), coils, and capacitors are mounted on the circuit board 12. The circuit board 12 is stacked on the heat dissipation member 16 via an insulating layer made of an insulating adhesive.

The heat dissipating member 16 is provided at the rear of the main body portion 11 and the mounting portion 25 and is made of a metal material having high thermal conductivity such as aluminum alloy or copper alloy, and many heat dissipating fins 17 are formed side by side on the back surface There is. A frame 18 is mounted on the front side of the heat dissipation member 16. The frame 18 is made of insulating synthetic resin, and is housed in a frame main body 19 shaped along the edge of the main body cover 21, and extends from the frame main body 19 to the attachment portion 25 side to receive the terminal 26. The part 30 is integrally formed.

The main body cover 21 is formed by punching and bending a thin plate-like metal made of aluminum, iron or the like. As shown in FIG. 2, the end edge portion of the side surface of the main body cover 21 is screwed to the heat dissipating member 16 with a screw 22 so that the main body cover 21 is connected to the ground via the heat dissipating member 16. A connector 23 connectable to an external connector is provided on the side surface of the main body 11.

(Mounting part 25)
The mounting portion 25 has a bolt-like terminal 26 electrically connected to the circuit board 12 and the terminal 26, and the pair of terminals 26 can receive the wire-side terminals T constituting the end portions of the pair of wires W. And a lid 40 covering the pair of openings 31 of the housing 30. The lower portion of the mounting portion 25 protrudes below the lower surface of the main body portion 11 (the lowermost surface of the main body cover 21). The opening 31 is open on the front side and the right side (the side from which the electric wire W is drawn), and the front side of the opening 31 is closed by the lid 40.

The electric wire W is a coated electric wire in which an insulating layer is formed around the conductor portion, and is connected to an external power supply side to supply power. A wire-side terminal T is attached to the end of the wire W. The wire-side terminal T is a round terminal in which the through hole of the terminal 26 is formed through, and is crimped to the conductor portion of the wire W. The wire-side terminal T is fastened to the bolt-like terminal 26 by a nut as a fastening member.

(Lid 40)
The lid portion 40 is formed separately from the housing portion 30, and covers the entire housing portion 30 (covers the pair of openings 31). A locked portion 44 locked to the locking portion 35 and a linked portion 46 connected to a linking portion 37 of the housing portion 30 described later are provided. The plate-like portion 41 has a rectangular shape, and a protrusion 42 extends in the vertical and horizontal directions on the outer surface side.

The locked portion 44 is in the form of a frame in which the locking hole 43 is formed through, and the lid portion 40 is locked by the locking portion 35 being locked at the hole edge of the locking hole 43. The opening of the part 40 is regulated. The locked portion 44 is flexible and deformable, and when the lid is closed, the locked portion 44 abuts on the locking portion 35 to elastically expand, and the lid 40 reaches the closed position. And, the locked portion 44 elastically restores.

As shown in FIGS. 3 and 4, the coupled portion 46 includes a pair of first

concave portions

47A and 47B rotatably supporting the shaft portion 38 of the coupling portion 37, and the first

concave portions

47A and 47B. And a second concave portion 50 rotatably supporting the shaft portion 38 of the connecting portion 37 from different sides.

The first

concave portions

47A and 47B both have an arc-shaped concave surface 48 in sliding contact with the outer peripheral surface of the shaft 38 on the inner surface side. The second concave portion 50 is disposed between the pair of first

concave portions

47A and 47B and fitted to the shaft portion 38, and has an arc-shaped concave surface 51 slidably contacting the outer peripheral surface of the shaft portion 38. The second concave portion 50 is fitted to the outer peripheral surface of the shaft portion 38 from the opposite side of the shaft portion 38 with the first

concave portions

47A and 47B. The concave surfaces 48 and 51 are curved with a curvature corresponding to the outer periphery of the shaft 38. The recessed

portions

47A, 47B, 50 are formed with openings 49 (see FIG. 9) which do not fit in the shaft portion 38 in a range of a predetermined arc among the entire circumference of the shaft portion 38. When the lid 40 is attached, the shaft 38 is passed through the opening 49 (for example, in the direction of FIG. 9 in the lid 40) to elastically deform the vicinity of the opening 49 (the position holding portion 39B The shaft portion 38 enters the inside of the

concave portions

47A, 47B, 50, and the connected portion 46 is connected to the connecting portion 37.

(Accommodating portion 30)
The housing portion 30 is made of insulating synthetic resin, and as shown in FIGS. 2 and 4, a bottom portion 30A on which the end portions of the pair of wires W are arranged, and a partition wall 36 for partitioning between the wires W. Is equipped. A connection plate 33 connected to an internal circuit is mounted on the bottom surface portion 30A. The head portion of the stud bolt is fixed to the connection plate 33 by, for example, welding while the terminal 26 formed by the shaft portion of the stud bolt passes through the insertion hole of the connection plate 33.

The outer surface (lower surface) of the lower partition wall 36 of the housing portion 30 is formed with a locking portion 35 for locking the locked portion 44 of the lid 40 to hold the lid 40 in the closed position. . The locking portion 35 has a shape in which the rear end projects in a step-like shape and the projection size decreases in an inclined manner toward the front end side. A connection portion 37 to which the connected portion 46 of the lid 40 is connected is formed at the front end portion (the front end portion of the upper portion of the accommodation portion 30) of the upper partition wall 36 of the accommodation portion 30. As shown in FIG. 3, the connecting portion 37 includes a pair of plate-like support walls 37 </ b> A that stand up from the partition wall 36 and a columnar shaft 38 that connects the pair of support walls 37 </ b> A.

As shown in FIG. 5, the shaft portion 38 includes a cylindrical main body 39A, and a position holding portion 39B which protrudes from the outer periphery of the main body 39A along the axial direction of the main body 39A. The position holding portion 39B extends in the left-right direction (along the axial direction) at the rear end portion of the outer periphery of the shaft portion 38.

The projecting dimension of the position holding portion 39B restricts the movement of the lid 40 in the rotational direction by coming into contact with the first

concave portions

47A and 47B of the coupled portion 46 and the

concave surfaces

48 and 51 of the second concave portion 50. The dimensions that can be set are set. In the present embodiment, the second concave portion 50 has a projecting dimension that can restrict movement (displacement) of the pivoting direction of the lid 40 due to vibration of the vehicle, and the first

concave portions

47A and 47B. On the other hand, when the cover 40 is opened by a predetermined angle or more (more than an angle at which the operator can easily attach the electric wire W), the cover 40 is pivoted in the closing direction by the weight of the cover 40. Is a projecting dimension that can be regulated.

When the pair of first

concave portions

47A, 47B and the second concave portion 50 are fitted and mounted on the shaft portion 38 of the connecting portion 37, the left and right ends of the first

concave portions

47A, 47B and the pair of support walls 37A. By facing each other in the close state, the movement of the lid 40 in the lateral direction is restricted, and the position of the lid 40 is maintained.

Next, the attachment operation of the end portion of the wire W to the attachment portion 25 will be described.
The electrical connection box 10 is attached to a vehicle body via a bracket or the like (not shown). In this state, the electrical connection box 10 is in a posture (standing in FIG. 3) standing vertically to the ground, the mounting portion 25 is disposed at the lower portion, and the lid 40 is in a closed position (see FIG. Figure 4, Figure 5). In this state, the position holding portion 39B contacts the concave surface 48 of the second concave portion 50 by generating a contact pressure. Then, in this closed position, the locked portion 44 is unlocked from the locking portion 35, and the lid 40 is pivoted in the direction of opening the coupled portion 46 on the upper end side and the connecting portion 37 as an axis. The position holding portion 39B of the connecting portion 37 slides while holding a state in which the concave surface 48 of the second concave portion 50 generates a contact pressure. Then, when the position holding portion 39B reaches the end where contact pressure is generated (FIG. 6, FIG. 7), the contact with the second concave portion 50 of the position holding portion 39B is released, and the angle of the lid 40 is the position holding portion The force required for the rotation of the lid 40 is reduced until the angle 39 B comes into contact with the first concave portions 47 A and 47 (FIGS. 8 and 9).

Then, when the angle of the lid 40 reaches the angle at which the position holding portion 39B abuts on the concave surface 48 of the first

concave portion

47A, 47B (FIGS. 10 and 11), the position holding portion 39B and the first concave portion 47A, A contact pressure with the concave surface 48 of 47 B is generated, and the rotational force of the lid 40 becomes slightly heavy due to the frictional force. The lid 40 is rotated to a predetermined angle which does not get in the way when the worker carries out the attachment work of the end of the electric wire W as it is (FIGS. 12 and 13).

In this state, since the position holding portion 39B generates contact pressure on the concave surface 48 of the first

concave portions

47A and 47B, the lid 40 is between the position holding portion 39B and the first

concave portions

47A and 47B. Due to its own weight, a frictional force is generated according to the closing force. Therefore, even if the worker does not support the lid 40, the position of the lid 40 is maintained. Then, the worker inserts the through holes of the respective wire side terminals T into the pair of terminals 26 protruding from the bottom surface portion 30A of the housing portion 30, and fastens them with a nut as a fastening member. Next, when the operator rotates the lid 40 in the opposite direction, the lid 40 is rotated while generating contact pressure in the position holding portion 39B in a predetermined angle range in the procedure reverse to the above. To the closed position.

The operation and effects of the present embodiment will be described.
According to the present embodiment, the to-be-connected portion 46 of the lid portion 40 is rotatably coupled to the connecting portion 37 provided on the upper side of the housing portion 30, so for example, the lid portion 40 is a housing portion Compared with the structure rotated on the lower end side at 30 as an axis, the electric connection box 10 can be mounted even in a vehicle where space allowance can not be provided below the electric connection box 10. Here, when the to-be-connected portion 46 of the lid portion 40 is rotatably connected to the connection portion 37 provided on the upper side of the housing portion 30, the lid at the time of connection of the end portion of the electric wire W Since the portion 40 is pivoted to the closing side by its own weight, there is a problem that the attachment workability of the end portion of the wire W is not good. According to the embodiment, when the electric wire W can be inserted through the opening 31 with the lid 40 opened by the position holding portion 39B of at least one of the coupled portion 46 and the connecting portion 37, The contact pressure to the other side is increased to hold the position of the lid 40. As a result, even if the operator does not support the lid 40, the work of attaching the end of the wire W can be performed, so that the work of attaching the end of the wire W is improved. Therefore, the attachment workability of the terminal part of the electric wire W can be improved about the electrical connection box 10 mounted in a vehicle.

Further, when the position holding portion 39B is in the closed position, the contact pressure to the other side is increased to hold the position of the lid 40.
In this way, the position of the lid 40 is maintained not only when the lid 40 is in the open state, but also when the lid 40 is in the closed position. It can suppress that the lid part 40 vibrates by vibration etc. and an abnormal noise generate | occur | produces.

Further, the connecting portion 37 is a cylindrical shaft portion 38, and the connected portion 46 has

concave portions

47A, 47B, and 50 slidably contacting the outer periphery of the connecting portion 37, and the position holding portion 39B is a connecting portion 37. It protrudes from the outer peripheral surface of.
In this way, since the position holding portion 39B is provided on the outer peripheral surface of the shaft portion 38, formation of the position holding portion 39B is facilitated. Moreover, compared with the structure which forms the position holding part 39B in the cover part 40 side, it can suppress that the position holding part 39B becomes a disorder | damage | failure at the time of attachment of the cover part 40. FIG.

Further, the position holding portion 39B is provided with a plurality of connected portions 46. The position holding portion 39B generates a contact pressure with one of the connected portions 46 to hold the lid 40 in a state of being opened at a predetermined angle or more. A contact pressure is generated between the two coupled portions 46 to hold the lid 40 in the closed position.
Thus, the position of the lid 40 can be maintained with a simple configuration, both when the lid 40 is in the open state and in the closed position.

Other Embodiments
The technology described in the present specification is not limited to the embodiments described above with reference to the drawings, and, for example, the following embodiments are also included in the technical scope described in the present specification.
(1) Although the position holding part 39B is made into the shape extended linearly along axial direction, it is not restricted to this. For example, one or more (non-linear) protrusions may be used as the position holder.
(2) In the above embodiment, the second concave portion 50 for holding the lid 40 in the closed position is provided. However, the second concave portion 50 may not be provided.

(3) Although the position holding part 39B was provided in the connection part 37, it is not restricted to this. For example, the position holding portion may be protruded on the concave surface 48 of the connected portion 46 to increase the contact pressure with the connecting portion 37. Further, the position holding portion 39B is not limited to the configuration in which the position holding portion 39B is provided in one of the connecting portion 37 and the connected portion 46, and the position holding portion 39B may be provided in both the connecting portion 37 and the connected portion 46.

(4) The electrical connection box 10 is not limited to the one in which the longitudinal direction is perpendicular to the ground, as in the above embodiment, as long as the lid 40 pivots with the upper side as the fulcrum. . For example, the electrical connection box 10 may be fixed to the vehicle in a posture in which the longitudinal direction is inclined with respect to the ground.

10: Electrical connection box 12: Circuit board 16: Heat dissipation member 25: Mounting portion 26: Terminal 30: Housing portion 31: Opening portion 37: Coupling portion 37A: Support wall 38: Shaft portion 39B: Position holding portion 40: Cover portion 46 :

Connected parts

47A, 47B: First concave part (concave part)
50: Second concave part (concave part)
W: Wire

Claims

A housing portion formed with an opening portion through which the terminal portion of the wire can be inserted, and a terminal connectable to the terminal portion of the wire is housed;
A connecting portion rotatably connected to a connecting portion provided on the upper side of the housing portion, and a cover portion which can be opened by turning from a closed position covering the opening; An electrical junction box mounted on a vehicle,
When at least one of the connecting portion and the connected portion is in a state in which the electric wire can be inserted into the opening in a state in which the lid is open, the contact pressure to the other side is increased to open the lid Electrical connection box provided with position holding part holding position of part.
The electrical connection box according to claim 1, wherein the position holding portion increases the contact pressure to the other side to hold the position of the lid when in the closed position.
The connecting portion has a cylindrical shaft portion, and the connected portion has a concave portion slidably contacting the outer periphery of the shaft portion,
The electrical connection box according to claim 1, wherein the position holding portion protrudes from an outer peripheral surface of the shaft portion.
Comprising a plurality of the connected parts;
The position holding portion generates a contact pressure with one of the connected portions to hold the lid in an open state, and a contact pressure with the other connected portion. The electrical connection box according to any one of claims 1 to 3, which is produced to hold the lid in the closed position.