JP6854615B2 - Current cutoff structure and electrical junction box with it - Google Patents

Description

The present invention relates to a current cutoff structure that cuts off a current supplied to an electrical component from a battery mounted on a vehicle, and an electric junction box provided with the current cutoff structure.

Conventionally, for example, when an automobile manufactured by an automobile manufacturer is exported overseas, a dark current continues to flow through the electrical components of the automobile for a long period of time, so that the battery may run out and the engine may not be able to start. is there. Therefore, at the time of shipment of the automobile, a fuse is removed from the circuit that supplies the power of the battery to the electrical component so that the dark current does not flow until the automobile is delivered to the dealer or the like.

Further, Patent Document 1 discloses that a part called a "fuse holder" is used in order to prevent the fuse that has been pulled out at the time of shipment of an automobile from being lost. This fuse holder is a component that inserts and removes the fuse from the frame of the electrical junction box while holding the fuse, and separates the position where the fuse is electrically connected to the connection terminal in the frame and the fuse from the connection terminal. It is configured so that it can be movably attached to the frame over the position where it is to be moved.

Japanese Unexamined Patent Publication No. 7-169382

However, in the current cutoff structure using the conventional fuse holder, there is a problem that the structure becomes large due to the use of the fuse holder. Further, in the current cutoff structure using the conventional fuse holder, in addition to the force for inserting and removing the fuse into the connection terminal when inserting and removing the fuse, the force for changing the locked state of the fuse holder (for example, lock). Since the arm requires a force to get over the lock protrusion), there is a problem that a large operating force is required in combination with these. Further, in the current cutoff structure using the conventional fuse holder, as described above, a large operating force is required for inserting and removing the fuse, so that there is a problem that semi-fitting or the like may occur due to insufficient pushing.

Therefore, an object of the present invention is to provide a current cutoff structure capable of miniaturization and an electric junction box provided with the current cutoff structure.

In order to achieve the above object, the invention according to claim 1 is a current cutoff structure that cuts off the current supplied to electrical components from a battery mounted on a vehicle, and is punched out from a conductive metal plate. formed Te, a proximal end, and a pair of male terminals extending in parallel from the base end portion, and a short pin having a pair of female terminals for respectively clamping the pair of male terminals, the pair Each tip of the pair of male terminals is displaced in the insertion direction of the male terminal into the female terminal, and the short pin is provided with a frame accommodating the female terminal. The pair of male terminals are sandwiched between the pair of female terminals to supply the current, and one male terminal is sandwiched between one female terminal and the other male terminal. Is non-contact with the other female terminal and is movable in the insertion direction over a cutoff position that cuts off the current, and the short pin is at least one of the male types at the connection position and the cutoff position. It is a current cutoff structure characterized in that the terminal is held by the female terminal by being sandwiched between the female terminals and is not held by other members.

The invention according to claim 2 is characterized in that, in the invention according to claim 1, the frame has a guide portion for restricting tilting of the short pin at the blocking position. Is.

The invention according to claim 3 is the invention according to claim 1 or 2, wherein the short pin has a grip portion protruding from the base end portion on the opposite side to the pair of male terminals. It is characterized by being present.

The invention according to claim 4 is an electrical connection box provided with the current cutoff structure according to any one of claims 1 to 3.

According to the invention described in claim 1, the short pin is held by the female terminal because at least one of the male terminals is sandwiched between the female terminals at the connection position and the cutoff position. Therefore, it is possible to provide a current cutoff structure that can be miniaturized. Further, since the short pin has a high degree of freedom in design unlike a fuse, it is possible to design the length of the pair of male terminals to be long and increase the contact allowance with the pair of female terminals. Therefore, even if no other member is used, at least one of the male terminals is sandwiched between the female terminals, so that the short pin can be reliably held by the female terminals, and the number of parts can be reduced. It can reduce the cost. Further, since this structure can omit other members such as the fuse holder described in the section of background technology and the section of problems to be solved by the invention, the operating force required for inserting and removing the short pin can be reduced (fuse). No force is required to change the locked state of other members such as the holder).

According to the second aspect of the present invention, since the frame has a guide portion for restricting the tilt of the short pin at the cutoff position, the male terminal is surely straightened to the female terminal. Can be plugged into. Further, it is possible to prevent the other male terminal from unintentionally contacting the other female terminal at the cutoff position.

According to the third aspect of the present invention, since the short pin has a grip portion protruding from the base end portion on the opposite side to the pair of male terminals, the short pin is connected to the connection position. Can be easily pulled up to the blocking position.

According to the invention described in claim 4, since the current cutoff structure according to any one of claims 1 to 3 is provided, it is possible to provide an electric connection box capable of miniaturization.

It is a schematic diagram which shows the current cutoff structure and the electric junction box which concerns on 1st Embodiment of this invention, and is the figure which shows the state which the short pin is positioned at the connection position. It is a figure which shows the state which the short pin of FIG. 1 is positioned at the cutoff position. It is a perspective view of the short pin of FIG. It is a perspective view of the female terminal of FIG. It is a perspective view of the short pin which constitutes the current cutoff structure which concerns on the 2nd Embodiment of this invention. It is the schematic which shows the current cutoff structure and the electric junction box which concerns on 3rd Embodiment of this invention.

(First Embodiment)
The "current cutoff structure" and the "electrical junction box" according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 4.

The electric junction box 100 shown in FIGS. 1 and 2 is a device mounted on an automobile and distributing power from a battery of the automobile to a plurality of electrical components. The electrical junction box 100 includes a frame 4 made of an insulating synthetic resin (only a part of which is shown in FIGS. 1 and 2), a plurality of electric components such as relays and fuses attached to the frame 4, and the frame 4. It includes a plurality of attached bus bars and a current cutoff structure 1 described later. The bus bar is a wiring member obtained by punching, bending, or the like on a conductive metal plate.

The current cutoff structure 1 is a structure that cuts off the current supplied from the battery to the electrical components (clock, anti-theft device, etc.). The current cutoff structure 1 accommodates a short pin 2, a pair of female terminals 3 that sandwich a pair of male terminals 21 and 22, which will be described later, and a pair of female terminals 3. It includes a frame 4.

The short pin 2 is formed by punching out from a conductive metal plate. As shown in FIG. 3, the short pin 2 has a base end portion 20 and a pair of male terminals 21 and 22 extending in parallel from the base end portion 20. One of the pair of male terminals 21 extends from one end of the proximal end portion 20. The other male terminal 22 of the pair extends from the other end of the proximal end 20. Each tip of the pair of male terminals 21 and 22 is displaced in the insertion direction of the male terminals 21 and 22 into the female terminal 3, and the length of one male terminal 21 is the other. It is longer than the length of the male terminal 22. The arrow S in FIG. 3 indicates the insertion direction of the male terminals 21 and 22 into the female terminal 3.

The pair of female terminals 3 are a part of the bus bar, and as shown in FIG. 4, are formed in a tuning fork shape having slits 31 into which male terminals 21 and 22 are inserted. Further, the pair of female terminals 3 are provided on separate bus bars. In FIGS. 1 and 2, the pair of female terminals 3 are drawn in the shape of an elongated rod, but in the figure, the side surfaces of the pair of female terminals 3 are drawn. That is, the female terminals 3 in FIGS. 1 and 2 are views of the female terminals 3 in FIG. 4 from the side.

As shown in FIG. 1, the short pin 2 has a connection position in which a pair of male terminals 21 and 22 are sandwiched between a pair of female terminals 3 and a current is supplied to the electrical component, and as shown in FIG. In addition, one male terminal 21 is sandwiched between one female terminal 3 and the other male terminal 22 becomes non-contact with the other female terminal 3 to cut off the current (as a result, the dark current is also cut off). ) And the direction of arrow S (the direction in which the male terminals 21 and 22 are inserted into the female terminal 3).

Further, the short pin 2 is held by the pair of female terminals 3 by sandwiching the pair of male terminals 21 and 22 between the pair of female terminals 3 at the connection position shown in FIG. Not held by other members. Further, the short pin 2 is held by one female terminal 3 by sandwiching one male terminal 21 between one female terminal 3 at the cutoff position of FIG. 2, and is held by the other female terminal 3. Not held by.

As described above, the short pin 2 is held by the female terminal 3 because at least one male terminal 21 is sandwiched between the female terminals 3 at the connection position and the cutoff position. The current cutoff structure 1 and the electrical junction box 100 can be miniaturized.

Further, since the short pin 2 has a high degree of freedom in design unlike the fuse as described in the background technology section, the length of the pair of male terminals 21 and 22 is designed to be long, and the short pin 2 is combined with the pair of female terminals 3. It is possible to increase the contact allowance. Therefore, the short pin 2 can be reliably held by the female terminal 3 because at least one male terminal 21 is sandwiched between the female terminals 3 without using another member such as a fuse holder. , The number of parts can be reduced and the cost can be reduced.

Further, the frame 4 has a guide portion 40 that regulates the tilt of the short pin 2 at the cutoff position shown in FIG. The guide portion 40 has a pair of walls 41 along each of the pair of male terminals 21 and 22. Since the frame 4 has the guide portion 40 in this way, the male terminals 21 and 22 at the cutoff position can be securely and straightly inserted into the female terminals 3. Further, it is possible to prevent the other male terminal 22 from unintentionally contacting the other female terminal 3 at the cutoff position.

In an automobile equipped with the electric junction box 100 having the above configuration, the short pin 2 is usually positioned at the connection position shown in FIG. On the other hand, when the current from the battery to the electrical component is cut off at the time of shipment of the automobile, the short pin 2 is pulled up from the connection position of FIG. 1 to the cutoff position of FIG. After that, when resuming the current supply from the battery to the electrical component, the short pin 2 at the cutoff position in FIG. 2 is pressed in the direction of the arrow S to be positioned at the connection position in FIG.

Further, when the short pin 2 at the cutoff position of FIG. 2 is pressed to the connection position of FIG. 1, the other male terminal 22 is pushed into the slit 31 of the other female terminal 3, but the one male terminal 21 is Since it is always inserted into the slit 31 of one female terminal 3, the short pin 2 is positioned at the connection position shown in FIG. 1 with a smaller insertion force than when both male terminals 21 and 22 are pushed into the slit 31. be able to. Further, since the current cutoff structure 1 can omit other members such as the fuse holder described in the section of the background technology and the section of the problem to be solved by the invention, the operating force required for inserting and removing the short pin 2 is small. (No force is required to change the locked state of other members such as the fuse holder).

(Second embodiment)
The "current cutoff structure" and the "electrical junction box" according to the second embodiment of the present invention will be described with reference to FIG. In FIG. 5, the same components as those in the first embodiment described above are designated by the same reference numerals, and the description thereof will be omitted.

In the current cutoff structure and the electrical junction box of the present embodiment, the short pin 102 of FIG. 5 is used instead of the short pin 2 of the first embodiment, and the other configurations are the same as those of the first embodiment. The short pin 102 is formed by punching from a conductive metal plate, and has a grip portion 23 protruding from the base end portion 20 to the opposite side of the pair of male terminals 21 and 22. Since the short pin 102 has the grip portion 23 in this way, the short pin 102 can be easily pulled up from the connection position (see FIG. 1) to the cutoff position (see FIG. 2).

(Third Embodiment)
The "current cutoff structure" and the "electrical junction box" according to the third embodiment of the present invention will be described with reference to FIG. In FIG. 6, the same components as those in the first embodiment described above are designated by the same reference numerals, and the description thereof will be omitted.

In the current cutoff structure 201 and the electrical junction box 200 of the present embodiment, the frame 204 of FIG. 6 is used instead of the frame 4 of the first embodiment, and the other configurations are the same as those of the first embodiment. This frame 204 does not have the guide portion 40 described in the first embodiment.

In the first to third embodiments described above, the base end portion 20 and the grip portion 23 of the short pins 2 and 102 are exposed, but in the present invention, the short pin is referred to as the base end portion 20. The grip portion 23 may be covered with an insulating synthetic resin.

In the first to third embodiments described above, the female terminal 3 has a tuning fork shape, but in the present invention, the female terminal may be a faston type or a tubular type.

It should be noted that the above-described embodiment merely shows a typical embodiment of the present invention, and the present invention is not limited to the embodiment. That is, it can be modified in various ways without departing from the gist of the present invention.

1,201 Current cutoff structure 2,102 Short pin 3 Female terminal 4,204 Frame 21,22 Male terminal 23 Grip 40 Guide 100,200 Electrical connection box

Claims (4)

It is a current cutoff structure that cuts off the current supplied to the electrical components from the battery mounted on the vehicle.
A short pin having a base end portion formed by punching from a conductive metal plate and a pair of male terminals extending in parallel from the base end portion.
A pair of female terminals that sandwich the pair of male terminals, and
A frame containing the pair of female terminals and
With
Each tip of the pair of male terminals is displaced in the insertion direction of the male terminal into the female terminal.
The short pin has a connection position in which the pair of male terminals are sandwiched between the pair of female terminals and the current is supplied, and one of the male terminals is sandwiched between one of the female terminals and the other. The male terminal is in non-contact with the other female terminal and is movable in the insertion direction over the cutoff position where the current is cut off.
The short pin is held by the female terminal by having at least one male terminal sandwiched between the female terminals at the connection position and the cutoff position, and is not held by another member. Characterized current cutoff structure. The current cutoff structure according to claim 1, wherein the frame has a guide portion for restricting tilting of the short pin at the cutoff position. The current cutoff structure according to claim 1 or 2, wherein the short pin has a grip portion protruding from the base end portion on the opposite side of the pair of male terminals. An electrical junction box comprising the current cutoff structure according to any one of claims 1 to 3.

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