JP2957063B2 - 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 junction box mainly mounted on an automobile.

[0002]

2. Description of the Related Art FIG. 5 shows an example of a conventional electric junction box.
1 is a housing (box main body), 3 is a fusible link (fuse), 5 is a male relay terminal, and 7 is a bus bar for forming a branch circuit. To assemble this electrical junction box,
The male relay terminal 5 and the bus bar 7 are mounted on the housing 1 from below.
Inserted into each of the housing sections. In addition, fusible link 3
Is inserted into the housing 1 from above. Then, one female terminal of the fusible link 3 and the male relay terminal 5 are connected, and the other female terminal and the male terminal of the bus bar 7 are connected. The bus bar 7 has a through hole 9.
Is positioned on the terminal connection portion 11 provided on the side surface of the housing 1, and the round terminal 15 of the terminal of the electric wire 13 is similarly positioned on the terminal connection portion 11. Then, the bus bar 7 and the round terminal 15 are connected to the terminal connecting portion 11 through the bolt 17 from the side.
, Thereby electrically connecting the electric wire 13 and the male relay terminal 5 via the bus bar 7 and the fusible link 3.

In this case, as shown in FIG. 6, a bus bar 7 is provided with a lance (flexible engagement arm) 1 provided in the housing 1.
By engaging with 9, it is positioned and fixed and is prevented from falling off.

In the electrical junction box, since the insertion direction of the fusible link 3 is the same as the detaching direction of the bus bar 7, the bus bar 7 may fall when the fusible link 3 is inserted. Also, if a large number of lances are provided to prevent this, the structure of the molding die becomes complicated. In addition, since the mounting direction of the round terminal 15 is from the lateral direction with respect to the housing 1, in order to mount the round terminal 15 after mounting the electric connection box on the vehicle,
A large work space is required. Therefore, the round terminal 1
It is necessary to attach the electric junction box to the vehicle after attaching the housing 5 to the housing 1, and the assembly procedure is limited.

As a solution to the above problem, an electric junction box as shown in FIG. 7 is known. This electric connection box is described in Japanese Utility Model Laid-Open No. 3-62474.
In the figure, 30 is a housing, and 32 is a bus bar. The housing 30 is provided with a slit 34 and a receiving hole 35 for inserting the bus bar 32 from above. Reference numeral 36 denotes a relay terminal, which is a male terminal 3 of the fuse 38.
8a and the male terminal 32a of the bus bar 32. Here, a horizontal connection plate 42 having a bolt through hole 42a is provided at an end of the bus bar 32. A horizontal terminal plate 44 having a bolt hole 44a is also provided at the end of the electric wire 13. 46 is a bolt previously fixed to the terminal connection portion of the housing 30;
Is a nut fastened to this bolt.

In order to assemble the electric junction box, bolts 46 are attached to terminal connection portions of the housing 30, and then the bus bars 32 are inserted into the slits 34 and the receiving holes 35 of the housing 30 from above. The hole 42a is passed through the bolt 46. Then, the relay terminal 36 is inserted into the housing hole 35 of the housing 30 and the lower end thereof is
Then, the fuse 38 is attached to the housing 30, and one of the male terminal portions 38 a is connected to the relay terminal 36. Similarly, the fusible link 3 is connected to the bus bar 32. Then, the bolts 46 are passed through the bolt holes 44 a of the terminal plate 44, the nuts 48 are screwed into the bolts 46, and the terminal plate 44 and the connection plate 42 are fastened together.

According to this, the insertion direction of the bus bar 32 becomes the same as the insertion direction of the fuse 38 and the fusible link 3, and the terminal plate 44 of the terminal of the electric wire 13 can be assembled from above and fixed with the nut 48. Therefore, problems such as the timing of attaching the terminal plate 44 and securing a work space are solved.

In the above-mentioned electric junction box, as shown in FIG. 8, the relay terminal 36 for electrically connecting the fuse 38 and the bus bar 32 moves up and down as it is. Therefore, as a mechanism for preventing the detachment of the relay terminal 36, a lance 52 is provided at the middle stage as shown in FIG. 9, and this is engaged with the notch of the relay terminal 36 to prevent the detachment of the relay terminal 36. Alternatively, as shown in FIG. 10, a lance 54 is provided at the upper end, and this is engaged with the upper end of the relay terminal 36 to prevent the relay terminal 36 from coming off.

FIG. 12 shows a case where the number of fuses 38 is two, three or four, and the same reference numerals in the drawing denote the same functional parts. In this figure, the bus bar is indicated by reference numeral 62, and the male terminal portion of the bus bar is indicated by reference numeral 62a.

FIG. 13 shows another electric connection box. In the figure, 80 is a housing,
It has a fuse mounting portion 82, a busbar housing portion 84, and a female terminal housing portion 86. The female terminal housing 86 has an electric wire 13
The female terminal 67 fixed to the terminal is inserted. The fuse mounting portion 82 is provided with a lance (flexible locking arm) 88 for fixing the female terminal 67. The fuse mounting portion 82 is located at the upper end, and the bus bar accommodating portion 84 communicating with the fuse mounting portion 82 has an open bottom so that the bus bar 62 can be inserted from below. At the back of the lance 88, a bending space 92 of the lance 88 is secured, and the fuse mounting portion 8 is provided.
2, when the fuse 38 is mounted, the male terminal 38
Guide part 94 for guiding a so as not to enter the above-mentioned gap.
Is provided.

Reference numeral 96 denotes a retainer (holding member). This is to prevent the lance 88 from bending in the disengagement direction and to double-lock the female terminal 67 by being inserted into the bending space 92 of the lance 88. The retainer 96 has
In a state inserted in the bending space 92, the bending space 92
There is provided an engagement arm 98 that locks with the engagement portion inside.

In order to assemble the electric junction box, the bus bar 62 and the relay terminal 36 are inserted into the bus bar receiving portion 84 of the housing 80 from below, and the female terminal 67 which is crimped to the electric wire 13 is inserted into the female terminal receiving portion 86. insert. Female terminal 67
Are locked by a lance 88. Similarly, the bus bar 62 and the relay terminal 36 are also locked by a lance (not shown). Next, the retainer 96 is inserted into the bending space 92 at the back of the lance 88 from above. At this time, if the female terminal 67 is not properly engaged with the lance 88, the retainer 96 cannot be inserted smoothly, and this can detect a poor insertion of the female terminal 67. When the retainer 96 is inserted into the bending space 92, the lance 88 does not move in the disengagement direction, so that the female terminal 67 is completely prevented from coming off.

Next, the fuse 38 is
Is mounted, one male terminal 38a of the fuse 38 is connected to the male terminal 62a of the bus bar 62 using the relay terminal 36, and the other male terminal 38a is connected to the female terminal 67. The rest is the same as the previous example.

[0014]

Problems to be Solved by the Invention Incidentally, FIGS.
In the electrical junction box shown in FIG. 11, since the insertion direction of the relay terminal 36 is the same as the insertion direction of the fuse 38, as shown in FIG.
A gap 56 is formed between the male terminal 38a and the male terminal 38a of the fuse 38 when the fuse 38 is assembled.

When the number of the fuses 38 is two, three or four as shown in FIG. 12, lances for fixing the relay terminals 36 must be provided by the number of the fuses 38. However, there is a problem that a molding die becomes complicated.

Further, in the electric junction box shown in FIG. 13, the retainer 96 is formed in a plate shape because it is inserted into the back of the lance 88, and the size is reduced by the size of the fuse 38. Therefore, it is difficult to perform assembling, and particularly when the number of units is two, three, or four, the length becomes long, and there is a problem that the assembling operation becomes more difficult due to bending at the time of molding and insufficient strength at the time of assembling. . Further, since the bus bar 62 and the relay terminal 36 are inserted from below, there is a problem that the bus bar 62 and the like are easily pulled out as described above.

In consideration of the above circumstances, the present invention can reliably prevent the bus bar from coming off and the relay terminal from coming off without using a lance integral with the housing, and thereby the configuration of the molding die for the housing. It is an object of the present invention to provide an electric junction box which can simplify the structure and can increase the strength of the holding member to make it easy to handle.

It is another object of the present invention to provide an electric junction box capable of suppressing rattling of a relay terminal caused by not using a lance.

Still another object of the present invention is to provide an electric junction box in which a fuse can be easily inserted.

[0020]

According to a first aspect of the present invention, there is provided an electric wire terminal which is provided in a fuse mounting portion, a busbar accommodating portion, and an electric wire terminal and accommodates an electric wire terminal terminal connected to one terminal portion of the fuse. A box body having a terminal housing portion, a bus bar for forming a branch circuit housed in the bus bar housing portion, a relay terminal for connecting a male terminal portion of the bus bar and the other terminal portion of the fuse, A flexible locking arm provided in the terminal accommodating portion and locking the inserted female terminal; and a locking of the flexible locking arm inserted into a bending space of the flexible locking arm. In an electric connection box provided with a holding member for preventing bending in the release direction, an insertion port of the bus bar of the bus bar accommodating portion is provided on the fuse mounting portion side, and the opposite side of the insertion port is closed with a bottom portion, and the bus bar is closed by the holding member. From the busbar housing section It is characterized in that a top wall to prevent the escape of the joint pin.

According to a second aspect of the present invention, the holding member is provided with a partition wall for dividing the bus bar accommodating portion into a plurality of portions, and accommodates a plurality of terminal portions of the bus bar, respectively.

According to a third aspect of the present invention, the holding member is provided with a guide portion for guiding a fuse mounted on the box body.

[0023]

In the electric connection box according to the first aspect of the present invention, since the bottom of the busbar receiving portion is closed and the holding member is provided with the upper wall for preventing the relay terminal from coming off, the busbar and the relay terminal are not connected. Dropout is reliably prevented. Further, since the relay terminal is prevented from coming off by the upper wall of the holding member, there is no need to provide a lance in the housing, and the configuration of the molding die of the housing can be simplified. Further, since the upper wall is provided on the holding member, the upper wall performs the same function as the rib, and the strength is increased to facilitate the handling.

In the electric junction box according to the second aspect of the present invention, since the holding member is provided with the partition wall, rattling of the relay terminal can be suppressed without holding by the lance.

In the electrical junction box according to the third aspect of the present invention, since the guide member for guiding the fuse is provided on the holding member, the fuse can be easily and reliably mounted on the housing. Further, the configuration on the housing side can be simplified correspondingly, and the configuration of the molding die of the housing can be simplified. In addition, since the guide portion functions similarly to the rib, the strength of the holding member is also improved.

[0026]

An embodiment of the present invention will be described below with reference to the drawings. This embodiment is an improvement of the conventional electric junction box shown in FIG. 13, and the portions denoted by the same reference numerals in the drawing are common to those in FIG.

FIG. 1 is a perspective view of the electrical junction box of the embodiment before being assembled, FIG. 2 is a cross-sectional view of the electrical junction box before the retainer is mounted, and FIG. 3 is a side of the electrical junction box before the fuse is mounted. FIG. 4 is a cross-sectional view as viewed from the front, and FIG. 4 is a cross-sectional view as viewed from the front of the electric junction box after the fuse is mounted.

In FIG. 1, reference numeral 100 denotes a housing (box body). At an end of the housing 100, a fuse mounting portion 102, a busbar receiving portion 104, and a female terminal receiving portion 106 are provided. The busbar accommodating portion 104 is closed at the bottom, and has a busbar insertion opening communicating with the fuse mounting portion 102 above. The female terminal accommodating portion 106 is provided with a lance (flexible locking arm) 108 for holding the female terminal 67 to be inserted, and a flexible space 110 for the lance 108 is secured at the back thereof. I have.

Reference numeral 150 denotes a retainer (holding member). The retainer 150 has an opening 152 for inserting a fuse, and includes a guide portion 154 for guiding the insertion of a fuse,
Engagement arm 1 for insertion into and engagement with flexible space 110
56, an upper wall 158 in which the opening 152 is formed, and a partition wall 162 extending downward. The upper wall 158 blocks the relay terminal 36 from coming off by closing the upper end of the busbar accommodating portion 104. The upper wall 158 has an engagement arm 156 extending downward at the front edge in the figure and extending upward at the rear edge in the figure. It has a guide portion 154, and has a partition wall 162 extending downward on the lower surface in the figure, and the whole is configured as a structure having three-dimensional rigidity.

To assemble the electric junction box, first,
As shown in FIG. 2, the bus bar 62 and the relay terminal 36 are inserted into the housing 100 from above, and the female terminal 67 fixed to the terminal of the electric wire 13 is inserted from below and engaged with the lance 108. Next, the retainer 150 is mounted on the housing 100 from above, and as shown in FIG.
Is inserted into the bending space 110 of the lance 108, and the partition wall 162 is inserted into the busbar receiving portion 104 so that the busbar receiving portion 104 is inserted into the upper wall 158.
Close the insertion slot. As a result, rattling of the relay terminal 36 is prevented, and the relay terminal 36 is held at a fixed position.

Thereafter, as shown in FIG.
8 is attached. At this time, the guide portion 15 of the retainer 150
4, the fuse 38 is guided.
Is mounted in a stable posture, and its male terminal portion 38a is connected to the relay terminal 36 in an appropriate state.

[0032]

As described above, according to the first aspect of the present invention, the bus bar and the relay terminal can be securely prevented from coming off without using a lance, and the structure of the molding die for the housing is simplified. be able to. Further, the strength of the holding member can be improved, and handling becomes easy.

According to the second aspect of the present invention, rattling of the relay terminal can be prevented without a lance.

According to the third aspect of the present invention, the fuse can be mounted in a stable posture, and the mounting of the fuse can be easily and reliably performed.

[Brief description of the drawings]

FIG. 1 is a perspective view of an electric junction box according to an embodiment of the present invention before being assembled.

FIG. 2 is a side sectional view showing a state in which a bus bar of the electric connection box according to the embodiment of the present invention is inserted.

FIG. 3 is a side sectional view showing a state where the retainer of the electric connection box according to the embodiment of the present invention is mounted.

FIG. 4 is a front sectional view showing a state in which a fuse according to one embodiment of the electric junction box according to the present invention is mounted.

FIG. 5 is a perspective view showing an example of a conventional electric connection box before assembly.

FIG. 6 is a partial sectional view of the electric junction box.

FIG. 7 is a perspective view showing a state before assembly of another example of the conventional electric connection box.

FIG. 8 is a partial cross-sectional view showing movement of a relay terminal of the electric junction box.

FIG. 9 is a partial sectional view of the electric junction box.

FIG. 10 is a partial sectional view of the electric junction box.

FIG. 11 is a partial sectional view showing an inconvenient state of the electric junction box.

FIG. 12 is a perspective view showing a state before assembly of another example of the conventional electric junction box.

FIG. 13 is a perspective view showing a state before assembling of still another example of the conventional electric connection box.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 13 Electric wire 36 Relay terminal 38 Fuse 38a Male terminal part 67 Female terminal 100 Housing (box main body) 102 Fuse mounting part 104 Busbar accommodation part 106 Female terminal accommodation part 108 Lance (Flexible locking arm) 110 Flexure space 150 Retainer (Holding member) 158 Upper wall 154 Guide part 162 Partition wall

Continued on the front page (56) References JP-A-6-151001 (JP, A) JP-A-1-146718 (JP, U) JP-A-2-60421 (JP, U) JP-A-3-62474 (JP , U) Hikaru 5-48528 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) H02G 3/16 H01R 9/22

Claims (3)

(57) [Claims] 1. A box body having a fuse mounting portion, a busbar housing portion, and a wire terminal terminal housing portion for housing a wire terminal terminal connected to one terminal portion of the fuse, the bus body being provided at the wire terminal, and the busbar. A bus bar for forming a branch circuit housed in the housing portion, a relay terminal for connecting a terminal portion of the bus bar and the other terminal portion of the fuse, and the female mold inserted and inserted in the wire terminal terminal housing portion A flexible locking arm that locks the terminal; and a holding member that is inserted into a bending space of the flexible locking arm and that prevents the flexible locking arm from bending in the unlocking direction. In the electrical junction box, an insertion opening of the bus bar of the bus bar receiving portion is provided on the fuse mounting portion side, and the opposite side to the insertion opening is closed with a bottom portion, so that the holding member prevents the relay terminal from being removed from the bus bar receiving portion. Provided an upper wall to block An electric junction box characterized by the above. 2. The electric connection box according to claim 1, wherein the holding member is provided with a partition wall for partitioning the bus bar accommodating portion into a plurality of portions, and accommodating a plurality of terminal portions of the bus bar, respectively. 3. The electric connection box according to claim 1, wherein the holding member is provided with a guide portion for guiding a fuse mounted on the box body.