JP2001045630A - Electrical junction box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely mount a bus bar on a main case, and check from the outside as to whether or not the bus bar is mounted surely. SOLUTION: A bus bar 12 having a pair of insertion members is inserted into two fitting holes in a main case body 11. The insertion member has a pull-out preventive member at a fitting step part at a boundary edge of the fitting hole thereof, and a cover 13 for pushing the bus bar 12 to the inserting direction is provided. The cover 13 and the main case body 11 have a fitting recessed part 26 and a fitting nail 24a engaged with each other, when the pull- out preventive member and the fitting step part are fitted.

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 disposed on an inner wall of a vehicle body of an automobile, for example.

[0002]

2. Description of the Related Art Heretofore, the following ones are known as one of electric connection boxes which are disposed in, for example, an automobile or the like and are used as connection branch points of wirings such as a wire harness.

[0003] As shown in FIG. 9, a bus bar 32 for distributing electric power, a fuse 33, and a fuse having connection terminals for connecting conductive terminals (not shown) of the fuse 33 are provided in a housing space of the main body case 31. A mounting portion 34 and the like are provided. When the number of power distributions by the bus bar 32 is small, as shown in FIG.
A retaining piece 36 is provided above the second insertion piece 35. The retaining piece 36 is arranged such that the insertion piece 35 of the bus bar 32 is cut in an inverted U shape, and the cut portion protrudes toward the outer surface of the bus bar 32.

When the bus bar 32 is mounted on the main body case 31, the insertion piece 35 of the bus bar 32 is inserted into a mounting hole 37 of the main body case 31. Then, the bus bar 32 from above
Is pressed against the elastic force of the retaining piece 36, the retaining piece 36 is inserted into the mounting hole 37, and when the retaining piece 36 corresponds to the locking step 38 on the back surface of the main body case 31, The bus bar 32 is locked to the locking step 38 and is attached to the main body case 31 so as not to be pulled out.

[0005]

However, since the locking step 38 of the main body case 31 is conventionally provided on the back surface of the main body case 31, the retaining piece 36 is fixed to the locking step 38.
It could not be seen from the outside whether it was locked. When the retaining piece 36 is not locked by the locking step portion 38 and the tip of the retaining piece 36 is locked in the mounting hole 37, the bus bar 32 is not attached because the retaining function does not work. There is a problem that the bus bar 32 comes off the main body case 31 due to a defective state.

An object of the present invention is to provide an electric junction box which can securely attach a bus bar to a main body case and can confirm from outside whether or not the attachment has been securely performed.

[0007]

According to a first aspect of the present invention, a bus bar having an insertion portion is inserted into a mounting portion provided in a main body case using the insertion portion. In the electrical junction box provided with a retaining portion that is locked to the periphery of the mounting portion, the bus bar pressing member that presses the bus bar in the insertion direction is provided in the insertion portion, and the bus bar pressing member; At least one of the members provided on the main body case side is provided with engaging means for engaging with each other in a state where the retaining portion and the peripheral edge of the mounting portion are locked, and the engaging means is provided on the main body case. The point is that the engagement between the side member and the bus bar pressing member is arranged at a position where the engagement can be confirmed from the outside.

According to a second aspect of the present invention, in the electric connection box according to the first aspect, the engaging means is provided on a member provided on the body case side and is engaged with a side surface of the bus bar pressing member. The gist of the present invention is that it is an elastic locking piece provided with a claw.

According to a third aspect of the present invention, in the electrical junction box according to the first or second aspect, a fuse mounting portion for mounting a fuse is provided in the main body case, and the fuse mounting portion has the fuse mounting portion. A connection terminal electrically connected to the bus bar and connecting a conductive terminal of the fuse, wherein the bus bar pressing member is interposed between the fuse and the fuse mounting portion when the fuse is mounted on the fuse mounting portion. The gist is that an intervening part is provided.

According to the first aspect of the present invention, while the bus bar is pressed by the bus bar pressing member, the engagement means provided on at least one of the bus bar pressing member and the member provided on the main body case side. Are engaged with each other. At this time, the retaining portion is securely inserted into the mounting portion and locked to the peripheral edge of the mounting portion by the pressing force pressing the bus bar. Therefore, when the retaining portion provided on the bus bar and the peripheral edge of the mounting portion are locked, the engaging means disposed at positions visible from the outside are engaged with each other.

According to the second aspect of the invention, in addition to the function of the first aspect, when the retaining portion provided on the bus bar and the peripheral edge of the mounting portion are locked, the locking claw presses the bus bar. Locked to the side of the member.

According to the third aspect of the present invention, in addition to the function of the first or second aspect, when the bus bar pressing member is to be detached from the main body case, the bus bar pressing member is removed after the fuse is removed. Is done.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 1, a busbar 12, a cover 13 as a busbar pressing member, a fuse 14, and a connection as a fuse mounting portion for connecting a conductive terminal 14a of the fuse 14 are provided in a housing space of a main body case 11 of the electric connection box. Terminals 15a and 15b are provided.

As shown in FIG. 5, the main body case 11 is formed of a synthetic resin, and a pedestal 16 is provided in the accommodation space of the main body case 11. The pedestal 16 is provided with two mounting holes 17 as mounting portions at positions facing each other. As shown in FIG. 4, the bus bar 12 is formed in a substantially square plate shape, and a pair of insertion pieces 18 as insertion portions extend downward and parallel to each other on both sides facing each other. The bus bar 12 is attached to the pedestal 16 of the main body case 11 by inserting the insertion piece 18 into the attachment hole 17 of the pedestal 16.

Above the insertion piece 18 of the bus bar 12, a resilient retaining piece 19 is provided. The insert piece 18 of the bus bar 12 is cut into the inverted U-shape of the retaining piece 19, and the cut portion projects obliquely outward from the mounting hole 17 toward the outer surface of the bus bar 12. The locking step 2 formed on the periphery of the mounting hole 17 on the back surface of the pedestal 16
0, the retaining piece 19 of the bus bar 12 is locked.

A narrow portion 21 is provided at one corner of the bus bar 12. As shown in FIG. 7, the narrow portion 21 includes a vertical portion 21 a extending vertically downward, a horizontal portion 21 b extending horizontally, and a rising portion 21 c extending vertically upward along the pedestal 16 of the main body case 11 in order. It is formed so as to be continuous. The rising portion 21c is fixed to the inner surface of the female connection terminal 15a while being inserted into the cylindrical female connection terminal 15a.

The connection terminal 15a is provided on the main body case 11 at a position substantially lower than the upper surface of the pedestal 16 in a substantially cylindrical first terminal.
The fitting member 22a is fitted and attached from above.
In the main body case 11, a connection terminal 15b is attached and fixed by a second mounting member 22b provided in the main body case 11 so as to face the mounting member 22a. The first,
The conductive terminals 14a of the fuse 14 are connected to the connection terminals 15a and 15b mounted on the second mounting members 22a and 22b.
a is removably inserted. The connection terminal 15b
Are electrically connected to a vehicle battery (not shown).

An outer peripheral wall 23 is provided on the periphery of the pedestal 16 of the main body case 11 so as to extend along the outer periphery of the upper surface of the bus bar 12. The outer peripheral wall 23 facing each other has the same outer peripheral wall 23.
And a pair of elastic resilient locking pieces 24 having locking claws 24a are provided to face each other.
The upper surface of the locking claw 24a is formed to be inclined downward in the direction in which the locking claw 24a protrudes (the direction in which the locking claw 24a faces in FIG. 1).

As shown in FIG. 5, the cover 13 mounted on the upper surface of the bus bar 12 has a rectangular plate-shaped flat plate portion 25, and a pair of engaging sides is formed on opposite side edges of the flat plate portion 25. A recess 26 is provided, and the locking claw 2 is
4a. In addition, since the locking claw 24a and the engaging concave portion 26 are both provided on the front side of the main body case 11, this engaged state is of course visible from outside. When the locking claw 24a is engaged with the engaging recess 26, the retaining piece 19 is locked by the locking step 20, and the bus bar 12 is pressed downward by the locking claw 24a. . The back surface of the engaging recess 26 is formed so as to be notched so as to go upward toward the periphery so as to correspond to the upper surface of the locking claw 24a, as shown in FIGS. Is provided with an L-shaped extending portion 27 along the same direction as the narrow portion 21 of the bus bar 12. An end portion 27a as an interposition portion of the extension portion 27 is disposed immediately above the connection terminal 15a.
As shown in FIG. 7, the fuse 14 is inserted into the connection terminal 15a through an insertion hole 28 provided in the connection terminal 15a. The insertion hole 28 of the end 27a is connected to one of the conductive terminals 1 of the fuse 14.
Only the main body 4a is insertable, and the upper body is impermeable.

At the end 27a, an insertion guide 29 for the fuse 14 is provided on the periphery of the insertion hole 28 so as to protrude upward from the end 27a. Also, the end portion 27a
In the figure, the protruding piece 30 is provided on the side of the connection terminal 15b toward the lower side of the same end 27a along the mounting member 22a.

Next, the assembly of the electric junction box configured as described above will be described. It is assumed that one connection terminal 15b is mounted on the main body case 11. In order to mount the bus bar 12, the cover 13, and the fuse 14 on the main body case 11, the connection terminal 15a fixed to the narrow portion 21 of the bus bar 12 is fitted to the first mounting member 22a, and the insertion piece 18 is provided in the mounting hole. 17 to be inserted. Thereafter, the insertion piece 18 of the bus bar 12 is
The bus bar 12 is attached to the main body case 11 by pressing the mounting hole 17 against the elastic force of the retaining piece 19.

Thereafter, the cover 13 is arranged so that the extending portion 27 of the cover 13 is in the same direction as the narrow portion 21 and the engaging concave portion 26 and the engaging claw 24a correspond to each other. In this state, the cover 13 is locked from above so that the cover 13 extends along the outer peripheral wall 23 of the main body case 11 and the projecting piece 30 of the extension 27 extends along the outer surface of the first mounting member 22a. Press against the elastic force of 24a. Then, the locking claw 2
When the upper surface of 4a slides on the slope on the back of the engaging recess 26, the locking piece 24 is elastically deformed, and furthermore, the flat portion 25
Presses the bus bar 12, and the locking claw 24 a is engaged with the engaging recess 26.

In this case, before the cover 13 is mounted, the retaining piece 19 is not locked by the locking step 20 and the tip of the retaining piece 19 is locked by the mounting hole 17. When the cover 13 is pressed to engage the engaging claw 24a with the engaging concave portion 26, the flat plate portion 25 of the cover 13 is pressed.
The bus bar 12 is also pressed against the elastic force of the retaining piece 19 by the lower surface of the bus bar 12. As a result, the locking claw 24a is engaged with the engaging concave portion 26, so that the retaining piece 19 corresponds to the locking step 20 on the back surface of the pedestal 16 of the main body case 11,
The bus bar 12 is securely fixed to the main body case 11 by being locked to the locking step portion 20. Therefore, only when the retaining piece 19 of the bus bar 12 is locked by the locking step 20 of the main body case 11, the locking claw 24a of the main body case 11 and the engaging concave portion 26 of the cover 13 are engaged. Is done.

Thereafter, the conductive terminal 14a of the fuse 14 is inserted into the connection terminals 15a and 15b while pressing them. At this time, one conductive terminal 14a of the fuse 14 is
According to the insertion guide 29 provided at the end 27a of the third
The connection terminal 15a is inserted through the insertion hole 28 of the end 27a.

When the cover 13 is detached from the main body case 11 for convenience, the conductive terminal 14a of the fuse 14 is pulled out from the connection terminals 15a and 15b, and then the engagement between the engagement claw 24a and the engagement recess is made. Is released, and the cover 13 is removed from the main body case 11. When the cover 13 is detached from the main body case 11 and the connection terminal 15b is electrically connected to the vehicle battery, the fuse 14 is removed and the busbar 12 is removed.
Is not charged, and there is no risk of electric shock even if the user touches the bus bar 12 after removing the cover 13.

According to the above embodiment, the following features can be obtained. (1) In the above embodiment, the retaining piece 1 of the bus bar 12
When the locking step 9 and the locking step 20 of the main body case 11 are locked, the engaging recess 26 of the cover 13 and the locking claw 24a of the main body case 11 are engaged. Therefore, by observing the locking claw 24a and the engaging concave portion 26 from the outside, it can be confirmed from the outside whether or not the attachment has been securely performed. In addition, by attaching the cover 13 to the main body case 11, the bus bar 12 can be securely attached to the main body case 11.

(2) In the above embodiment, the cover 13 cannot be removed without removing the fuse 14 when removing the cover 13 from the main body case 11. You will not get an electric shock if you touch it.

(3) In the above embodiment, since the upper surface of the locking claw 24a and the rear surface of the engaging concave portion 26 are formed so as to be inclined corresponding to each other, the cover 13 can be easily attached to the main body case 11.

(4) In the above embodiment, the main body case 11
Is provided along the outer periphery of the cover 13 so that the cover 1 extends along the outer wall 23.
3 can be mounted on the main body case 11 more easily.

The above embodiment may be modified as follows. In the above embodiment, the two locking claws 24a are provided so as to face each other, but three or more locking claws 24a may be provided at different positions.

In the above embodiment, the locking claws 24a are provided on the main body case 11 and the engaging recesses 26 for engaging with the locking claws 24a are provided on the cover 13. However, as shown in FIG.
A locking claw 24a is provided on the cover 13, and an engaging recess 26 having a small protrusion 26a is provided on the upper inner surface of the pedestal 16 of the main body case 11, and the locking claw 24a is moved beyond the small protrusion 26a. May be engaged in the engagement recess 26. In this case, the locking claw 24a and the small protrusion 26a engage,
The same effect as the above embodiment can be obtained.

The engaging recess 26 of the above embodiment is omitted, and the upper surface of the cover 13 is directly locked by the locking claw 24a. At this time, the retaining piece 19 is pressed by the pressing force of the cover 13 pressing the bus bar 12. It may be inserted into the mounting hole 17 and locked by the locking step 20. Even in this case, the same effect as the above embodiment can be obtained.

In the above embodiment, one insertion hole 28 for inserting the conductive terminal 14a of the fuse 14 is provided at the end 27a for interposing the fuse 14 and the connection terminal 15a. Two insertion holes 28 for inserting the respective terminals 14a are provided, an insertion groove is used instead of the insertion hole 28, or an end 27a in which the insertion hole is omitted.
And the same end 27a is connected to the fuse 14 and the connection terminal 15a,
15b.

Next, technical ideas other than those described in the claims which can be understood from the above embodiment and other examples will be described below together with their effects. (1) In any one of claims 1 to 3,
An electric connection box in which opposing surfaces of the locking claw and the bus bar pressing member are inclined before engagement with the locking claw and the bus bar pressing member. In this case, even if the elastic force of the locking claw is strong, it can be easily engaged.

(2) The electrical junction box according to claim 3, wherein the interposed portion is provided with an insertion hole into which one conductive terminal of the fuse is inserted. By doing so, the fuse and the connection terminal are reliably interposed, and the bus bar pressing member is not removed before the fuse.

[0036]

As described above in detail, according to the first aspect of the present invention, when the retaining portion provided on the bus bar and the peripheral edge of the mounting portion are locked, it can be seen from the outside. Since the engaging means arranged at the position are engaged with each other, it can be confirmed from the outside whether or not the attachment has been securely performed.

According to the second aspect of the present invention, in addition to the effect of the first aspect, when the retaining portion provided on the bus bar and the peripheral edge of the mounting portion are locked, the locking claw presses the bus bar. Locked to the side of the member. Therefore, by attaching the bus bar pressing member to the main body case, the bus bar can be securely attached to the main body case.

According to the third aspect of the present invention, in addition to the effect of the first or second aspect, when the bus bar pressing member is to be detached from the main body case, the bus bar pressing member is not removed after the fuse is removed. Since the bus bar is removed, there is no electric shock even if the bus bar is touched after removing the bus bar pressing member.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an electric junction box according to an embodiment.

FIG. 2 is a front view showing a cover of the embodiment.

FIG. 3 is a plan view of the same.

FIG. 4 is a perspective view showing a bus bar of the embodiment.

FIG. 5 is a cross-sectional view taken on line A- in FIG. 1 after assembly of the embodiment;
FIG.

FIG. 6 is an enlarged cross-sectional view of a main part of the same line BB.

FIG. 7 is a sectional view taken along line CC of FIG.

FIG. 8 is a cross-sectional view of an electric junction box in another example.

FIG. 9 is a perspective view of a conventional electric junction box.

FIG. 10 is a sectional view taken along line XX in FIG. 9;

[Explanation of symbols]

11: body case, 12: bus bar, 13: cover (bus bar pressing member), 14: fuse, 14a: conductive terminal, 15a, 15b: connection terminal (fuse mounting part), 1
7: mounting hole (mounting portion), 18: insertion piece (insertion portion), 19
... Retaining piece (retaining part), 24 ... Locking piece, 24a ...
Locking claw, 27a ... end (intervening part).

Claims (3)

[Claims] A bus bar having an insertion portion is attached to an attachment portion provided in a main body case by inserting the bus bar with the insertion portion, and the insertion portion is provided with a retaining portion which is locked to a peripheral edge of the attachment portion. An electric connection box provided with a bus bar pressing member for pressing the bus bar in an insertion direction, wherein the bus bar pressing member and at least one of the members provided on the main body case side are provided with the retaining portion and the bus bar pressing member. In a state where the peripheral edge is locked, engaging means for engaging with each other is provided, and the engaging means is arranged at a position where the engagement between the member on the main body case side and the bus bar pressing member can be confirmed from the outside. An electrical junction box. 2. The elastic member according to claim 1, wherein the engaging means is a resilient locking piece provided on a member provided on the body case side and having a locking claw that locks on a side surface of the bus bar pressing member. Electrical junction box. 3. A fuse mounting portion for mounting a fuse is provided in the main body case. The fuse mounting portion includes a connection terminal electrically connected to the bus bar and connecting a conductive terminal of the fuse. The electrical connection box according to claim 1, wherein the bus bar pressing member is provided with an interposed portion interposed between the fuse and the fuse mounting portion when the fuse is mounted on the fuse mounting portion.