JPH103953A - Electronic part holding structure in electric connection box, electronic part holding body, and electric connection box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure holding of an electronic part between bus bars, and improve reliability of circuit connection without complicating manufacturing processes of an electric connection box. SOLUTION: A standing tab part 43 of a bus bar 42 has a pair of pressure connection members 45, 45 to form a slot 44 to hold a lead wire 61 of an electronic part 60. In an electronic part containing chamber 40 of an electric connection box, an electronic part holding body 20 preliminarily holding the electronic part 60 is installed. Pressure protrusions 30 are provided on mutually facing inner wall surfaces of the electronic part holding body 20. Each pressure connection member 45 is pressed by the pressure protrusion 30 from back, and the lead wire 61 is held by pressure by the pressure connection members 45, 45.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric junction box (junction block) which enables intensive branch connection of an electric circuit or an electronic component of an automobile or the like, and more particularly to a structure for holding an electronic component in the electric junction box. Further, the present invention relates to an electronic component holder and an electric connection box according to the holding structure.

[0002]

2. Description of the Related Art Junction blocks are used to collectively connect branch connections of wire harnesses for automotive electrical components and to integrate fuses and the like into one place. In general, a junction block is formed by laminating a plurality of branch conductive circuits called bus bars, each of which is formed by punching a metal plate such as a copper plate to erect a terminal portion, while fixing the branch conductive circuit to an insulating plate.

FIG. 7 shows an example of a conventional method for mounting an electronic component 15 such as a diode, a resistor, and a capacitor in the middle of a bus bar. The bus bar 1 is provided on the upper surface of the insulating plate 11.
2 are fixed, and a tab portion 13 which stands substantially at a right angle is provided at each cut end of the bus bar 12. Each tab portion 13 is provided with a pair of pressure contact pieces 13a, 13a, and a vertical groove-shaped U slot 14 is formed between both pressure contact pieces. Then, an electronic component 15 having two lead wires is laid between the opposed tab portions 13, and each lead wire is press-fitted and held in each U-slot 14, so that a functional circuit by the electronic component 15 becomes a bus bar. 12 are formed.

[0004]

A junction block is often placed in a severe environment such as an engine room of an automobile, and is required to have sufficient reliability against heat and vibration. However, in the press-fit holding structure into the U-slot as described above, the pressure contact piece 13a of the tab portion 13 may be displaced by heat or vibration, and the clamping force of the lead wire by the pair of pressure contact pieces may be extremely weakened. In this case, the contact resistance between the bus bars 12 increases, which may hinder the function circuit from performing its original function.

In consideration of this point, it is possible to press-fit the lead wire into the U-slot 14 and then solder it to the contact portion. However, such a secondary treatment is preferable because it increases the manufacturing cost. Absent.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to ensure the holding of electronic components between bus bars without complicating the manufacturing process of an electric junction box, and to improve the reliability of circuit connection. It is an object of the present invention to provide a structure for holding an electronic component in an electric junction box, which can increase the power consumption. It is another object of the present invention to provide an electronic component holder and an electric connection box suitable for forming the electronic component holding structure.

[0007]

According to the first aspect of the present invention (the structure for holding an electronic component in an electric junction box), a lead wire of the electronic component is held on an upright tab portion of a bus bar. In an electric connection box provided with a pair of pressure contact pieces forming a slot, an electronic component holder is provided that is detachable from the electric connection box, and the inner wall surface of the electronic component holder or the electronic component holder facing the same. The configuration is characterized in that a pressing projection is provided on the pressing piece of the bus bar tab portion. According to this configuration, based on the engagement between the inner wall surface of the electronic component holder and the pressure contact piece of the bus bar tab portion via the pressing projection, the pair of pressure contact pieces hold the lead wire in a pressure-sensitive manner. It is possible to do.

According to a second aspect of the present invention (a structure for holding an electronic component), the pressing projection is provided on the inner wall surface side of the electronic component holding body. Claim 3
In the invention (electronic component holding structure) described in (1), a locking portion that engages with the pressing projection provided on the inner wall surface side of the electronic component holding body is formed on the press-contacting piece of the bus bar tab portion. This is a feature of the configuration.

The invention according to claim 4 (electronic component holder).
Is an electronic component holder detachable from the electrical junction box, comprising a pair of opposing walls defining an internal space for storing and holding the electronic components, and an inner wall surface of the pair of walls. Each of them is provided with a pressing projection, which is a feature of its configuration. When the electronic component holder is mounted on the electric connection box, the upstanding tab portion of the bus bar is pressed in the electric connection box by the pair of pressing projections.

[0010] The invention (electric junction box) according to claim 5 is as follows.
An electrical junction box provided with a bus bar having an upstanding tab portion, wherein the tab portion is provided with a pair of press contact pieces to form a slot for holding a lead wire of an electronic component, and each of the press contact pieces is provided with a pair of press contact pieces. The configuration is characterized in that a pressing projection is provided on the outer portion. When the electronic component holder is mounted on the electric connection box, the pair of pressure contact pieces are pressed in a direction approaching each other based on the engagement between the pressing protrusion and the electronic component holder, and both pressure contact pieces are pressed. Thereby, the lead wire of the electronic component is pinched.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an electric junction box (junction block) for a vehicle according to an embodiment of the present invention will be described in detail with reference to FIGS.

As shown in FIGS. 4 and 5, on the upper surface side of the case member 41 constituting the electric connection box, an electronic component storage chamber 40 which is opened upward is provided. Is mounted with an electronic component holder 20 which holds a diode 60 as an electronic component in advance. The electronic component holder 20 also serves as a cover for the ceiling of the electronic component storage room 40. The electronic component holder 20 and the case member 41 of the electric connection box are preferably formed of a plastic having excellent heat resistance such as a polypropylene resin.

As shown in FIGS. 1 and 2, the electronic component holder 20 comprises a box comprising opposing front and rear walls 21 and 22, opposing left and right walls 23 and 24, and a ceiling wall 25. It has a shape. The front and rear walls 21 and 22 and the left and right walls 23 and 24 define an internal space S for storing and holding electronic components.

Locking projections 21 are provided on the outer surfaces of the front and rear walls 21 and 22 and the left and right walls 23 and 24 of the electronic component holder 20.
a, 22a, 23a and 24a are formed. on the other hand,
Locking holes 40a into which the locking projections 21a, 22a, 23a and 24a can be engaged are provided at a plurality of locations on each wall section defining the electronic component storage chamber 40. Then, the locking projections 21a, 22a, 23a, 24 of the electronic component holder 20
The electronic component holder 20 is detachably mounted in the electronic component storage room 40 of the electric connection box based on the engagement relationship between the electronic component storage room 40 and the locking hole 40a on the electronic component storage room 40 side. ing.

A pair of vertical grooves 26 is cut in the vicinity of the center of each of the left and right walls 23, 24 of the electronic component holder 20, and the center of each of the left and right walls 23, 24 is held by the holding arms 27, 2.
8 is provided. As a result, the opposing holding arms 27 and 28 have appropriate elasticity to the extent that electronic components can be inserted and removed between them. Also, the electronic component holder 20
On the back side (inside) of the ceiling wall 25, a holding pedestal 29 is provided.

The electronic component holder 20 of this embodiment has an electronic component 6 having a cylindrical main body such as a diode and two lead wires 61 extending along the axial direction of the main body.
It is designed to hold 0. Therefore, as shown in FIG. 2 and FIG. 3A, the contact surface at the bottom of the holding pedestal 29 has a cylindrical main body corresponding to the outer peripheral shape of the electronic component 60 and the longitudinal direction of the electronic component holding body 20. It is formed in a triangular roof shape so that it can be held while being positioned along the direction. Also, the inner distal end of each of the holding arms 27 and 28 has a partially curved inner peripheral surface corresponding to the outer peripheral shape of the electronic component 60 so that the cylindrical main body can be held and held from both sides. It has a protruding shape.

As shown in FIGS. 2 and 3 (B), the inner wall surfaces of the left and right walls 23, 24 of the electronic component holder 20 are located at positions substantially corresponding to the rear sides of the locking projections 23a, 24a. The pressing protrusions 30 are provided to face each other. As shown in FIG. 4, the formation position (height) of each pressing protrusion 30 is set corresponding to the height of the upper end of the upright tab portion 43 of the bus bar 42 provided in the case member 41. I have. That is, the tab portion 43 has a U-slot 44 extending vertically along the vertical center line, and the U-slot 44 is formed by a pair of left and right pressure contact pieces 45, 45 occupying the upper half of the tab portion 43. Is formed. Each pressing projection 30 is positioned at a height corresponding to a position near the upper end of each pressure contact piece 45 corresponding thereto.

In each press contact piece 45, a portion of the press contact piece 45 that comes into contact with the corresponding press protrusion 30 is provided with the press protrusion 3
A concave locking portion 45a capable of locking 0 is formed.
The locking portion 45a is for ensuring the pressing of the pressing piece 45 by the pressing protrusion 30. The amount of depression (depth) of the locking portion 45a depends on the corresponding pressing projection 30.
Is set to be shallower than the protrusion amount (projection height), so that there is no problem in pressing the pressing piece 45 by the pressing protrusion 30.

Further, as shown in FIGS. 2, 3B and 5, a ceiling wall 25 of the electronic component holder 20 has front and rear walls 2 attached thereto.
A total of four holding portions 31 projecting substantially in parallel with 1 and 22 are provided. Two of these holding portions 31 are provided in front and rear of the holding pedestal 29 in front of each other. As shown in FIG. 3B, each holding portion 31 has a concave portion 32 cut out in an inverted V-shape in a lower half portion thereof. The innermost part of each recess 32 is the lead wire 61 of the electronic component 60.
Is provided in a shape corresponding to the shape of the lead wire so that the wire can be held from the side.

Next, a method of using the electronic component holder 20 of the present embodiment will be described. The electronic component 60 is mounted and held on the electronic component holder 20 in advance. In this mounting state, the main body portion of the electronic component 60 is sandwiched between the holding arms 27 and 28 and the holding pedestal 29 of the holding body 20, and both the lead wires 61 of the electronic component 60 are moved to the innermost portions of the concave portions 32 of the pressing portions 31. Is held.

When the electronic component holder 20 holding the electronic component 60 is fitted into the electronic component storage chamber 40 of the electric connection box, as shown in FIG. 4 and FIG. The electronic components 21 a and 22 a are engaged in the locking holes 40 a in the wall of the electronic component storage room 40, and the electronic component holder 20 is fixed in the electronic component storage room 40. With the fitting of the electronic component holder 20, each lead wire 61 of the electronic component 60 held by the electronic component holder 20 becomes a corresponding tab portion 4.
3 is pressed into the U slot 44, and left and right pressure contact pieces 45,
45. At the same time, each of the left and right pressure contact pieces 45, 45 is provided with a pressing projection 30 protruding from the left and right walls 23, 24 of the electronic component holder 20 at its locking portion 45 a.
Accept. As a result, the left and right walls 23, 24 press the pressing members 45, 45 from behind via the pressing protrusions 30, and the pressing members 45, 45 are urged to approach each other. The left and right pressing pieces 45, 45 pinch each other.

Now, the characteristic effects of the present embodiment are as follows. (B) In each tab portion 43 of the bus bar 42, the lead wire 61 of the electronic component 60 is securely pressed and held by the pair of pressure contact pieces 45, 45 pressed from behind by the pressing projections 30 of the electronic component holding body 20. Can be. Therefore, there is no possibility that the pressing force of the lead wire between the two pressure contact pieces is weakened by heat or vibration from the environment in which the electric connection box is arranged, and a situation in which the contact resistance between the bus bars 42 is increased is prevented. This greatly improves the reliability of the circuit connection of the electronic component to the bus bar.

(B) Since the lead wire 61 of the electronic component 60 is pinched by the pair of press contact pieces 45, 45, especially soldering or the like is applied to the connection portion between the lead wire 61 and the press contact piece 45. No need to apply. Therefore, it is not necessary to provide a process such as soldering when manufacturing the electric connection box, and it is possible to avoid complication of the manufacturing process of the electric connection box. This contributes to a reduction in the manufacturing cost of the electric junction box.

(C) Each holding portion 31 protruding into the electronic component holder 20 holds the lead wire 61 of the electronic component 60 in the concave portion 32, so that the electronic component holder 20 is connected to the electronic connection box. When fitting into the component storage chamber 40,
1 can support the lead wire 61 from behind. That is, in order for the lead wire 61 to enter the U-slot 44 of the tab portion 43, it is necessary that the lead wire 61 pushes and spreads both the pressure contact pieces 45 to advance in the U-slot 44. In this case, the two pressure contact pieces 45 try to prevent the lead wire 61 from entering between them due to the rebound resilience. However, since the lead wire 61 is supported from behind, the pressing portions 31 This prevents the piece 45 from being bent without entering the U-slot 44 because it cannot completely withstand the resilience of the piece 45. Therefore, according to the electronic component holder 20 of the present embodiment, when the electronic component holding member 20 is fitted into the electronic component storage chamber 40, each lead wire 61 is reliably inserted between the two pressure contact pieces 45, and a sufficient electrical connection is achieved. Can be secured.

It should be noted that the present invention is not limited to the above-described embodiment, but can be implemented in the following manner, for example. (A) As shown in FIG. 6, pressing protrusions 47 are provided on the outer side of each pressure contact piece 45 of the bus bar tab portion 43 without forming pressing protrusions on the inner wall surfaces of the left and right walls of the electronic member holder 20. Is also good. According to this configuration, the electronic member holder 20
Is mounted in the electronic component storage chamber 40,
Through the inner wall surfaces of the left and right walls 23, 24,
5 are pressed toward each other. Therefore, a pinching force of the lead wire 61 of the electronic component is generated by the two pressure contact pieces 45, and the same operation and effect as in the above embodiment are exerted.

(B) In the tab portion 43 shown in FIG. 4, the formation of the locking portion 45a in each press contact piece 45 may be omitted.

[0027]

As described above in detail, according to the electronic component holding structure according to the first to third aspects of the present invention, the inner wall surface of the electronic component holder and the bus bar tab are pressed into contact with each other via the pressing projection. Based on the engagement with the piece, it becomes possible to hold the lead wire of the electronic component with the pair of pressure contact pieces in a pressure-tight manner,
Without complicating the manufacturing process of the electric junction box, it is possible to reliably hold the electronic components between the bus bars and to improve the reliability of the circuit connection.

The electronic component holder and the electric connection box according to the fourth and fifth aspects are suitable for constituting the holding structure of the electronic component, and the corresponding electric connection box or electronic component holder. And cooperating with the above, the pressure holding of the lead wire of the electronic component by the pair of pressure contact pieces can be effectively performed.

[Brief description of the drawings]

FIG. 1 is a side view of an electronic component holder according to an embodiment of the present invention.

FIG. 2 is a bottom view of the electronic component holder shown in FIG.

3A is a sectional view taken along line 3A-3A in FIG. 1, and FIG. 3B is a sectional view taken along line 3B-3B in FIG.

FIG. 4 is a cross-sectional view showing a state where the electronic component holder is mounted on the electric junction box.

FIG. 5 is a longitudinal sectional view showing a state in which the electronic component holder is mounted on the electric junction box.

FIG. 6 is a sectional view corresponding to FIG. 4, showing another example of a bus bar.

FIG. 7 is a perspective view showing a conventional electronic component holding structure.

[Explanation of symbols]

Reference Signs List 20: electronic component holder, 23, 24: left and right walls as a pair of walls, 30: pressing projection, 40: electronic component storage room in electric connection box, 42: bus bar, 43: tab portion,
44: U slot, 45: press-contact piece, 45a: locking portion, 4
7 ... Pressing projection, 60 ... Diode as electronic component, 6
1: Lead wire, S: Internal space.

Claims (5)

[Claims] 1. An electric connection box comprising a pair of press-contact pieces forming a slot for holding a lead wire of an electronic component on an upstanding tab portion of a bus bar. In addition to providing a component holder, a pressing projection is provided on an inner wall surface of the electronic component holding body or a pressure-contacting piece of the bus bar tab portion facing the inner wall surface, and an inner wall surface of the electronic component holding body and the bus bar tab via the pressing projection A structure for holding an electronic component in an electric junction box, wherein the lead wire is held by the pair of press contact pieces based on engagement of the portion with the press contact pieces. 2. The structure for holding an electronic component in an electric junction box according to claim 1, wherein said pressing projection is provided on an inner wall surface side of said electronic component holding body. 3. The press-contacting piece of the bus bar tab portion has a locking portion for engaging with the pressing projection provided on the inner wall surface side of the electronic component holder. 3. A structure for holding an electronic component in the electric junction box according to 1. 4. An electronic component holder detachable from an electric junction box, comprising a pair of opposed walls defining an internal space for storing and holding electronic components, and a pair of opposite walls. An electronic component holder in which a pressing protrusion is provided on each of the inner wall surfaces, and a pair of the pressing protrusions can press a raised tab portion of a bus bar in an electric connection box. 5. An electric connection box provided with a bus bar having an upright tab portion, wherein said tab portion is provided with a pair of press-contact pieces to form a slot for holding a lead wire of an electronic component. An electric connection box in which a pressing projection is provided on an outer portion of each pressure contact piece, and the pair of pressure contact pieces are pressed in a direction approaching each other based on engagement between the pressing protrusion and the electronic component holder.