JP2013037949A - Fuse unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent breakage of a power source side terminal of a fuse unit.SOLUTION: The fuse unit comprises: a power source side terminal 7 connected to a bolt 17 standing on a battery terminal 3; load side terminals 9, 11 connected to load terminals; a conductor, in which the power source side terminal 7 and a fusible element provided across the load side terminals 9, 11 are integrally formed into a flat plate shape; and a resin cover 13 for exposing connection parts of the power source side terminal 7 and other terminals of the load side terminals 9, 11 and covering the conductors. The connection part of the power source side terminal 7 has a side part 29 positioned along an edge of the cover 13. A notch part 35 for exposing both faces of the connection part of the power source side terminal 7 is formed on the cover 13. The notch part 35 has a bolt hole 51 corresponding to a bolt hole 23 of the power source side terminal 7, and is formed into a structure capable of holding a reinforcing plate 49 overlaid on and fastened to a terminal face of the power source side terminal 7.

Description

  The present invention relates to a fuse unit, and more particularly to a fuse unit connected to an electrode of a battery via a battery terminal.

  For example, in Patent Document 1, a fuse unit is connected to an electrode of a battery mounted on an automobile via a battery terminal, a load terminal connected to a load is connected to the fuse unit, and the battery and the load are connected to the fuse unit. It has been proposed to connect via. The fuse unit of the same document is passed to the power supply side terminal formed with a bolt hole connected to the bolt erected on the battery terminal, the load side terminal to which the load terminal is connected, and the power supply side terminal and the load side terminal. A conductive body integrally formed in a flat plate shape and a cover made of resin covering the conductor by exposing the connecting portion between the power supply side terminal and the other terminal of the load side terminal. . The connection portion of the power supply side terminal of the conductor has a side portion located along the edge portion of the cover, and the cover has a notch portion that reaches the edge portion of the cover. Both sides of the connecting portion of the side terminal are exposed. Then, the bolt of the battery terminal is inserted into the bolt hole of the exposed connection portion and fastened with a nut, and the fuse unit is connected to the battery electrode.

JP 2000-315991 A

  However, in the fuse unit as in Patent Document 1, when the power supply side terminal and the battery terminal bolt are connected, the power supply side terminal may be damaged by the fastening force of the nut. That is, when the nut is fastened, the power supply side terminal is sandwiched and connected by the surface on which the nut and the battery terminal bolt stand. At this time, for example, when using a forged battery terminal that has more unevenness than press processing, the force applied to the power supply side terminal varies due to the unevenness of the surface on which the bolt is erected, and the electric wire side terminal is damaged. is there.

  The problem to be solved by the present invention is to prevent damage to the power supply side terminal of the fuse element.

  In order to solve the above problems, the fuse unit of the present invention includes a power supply side terminal formed with a bolt hole connected to a bolt erected on a battery terminal, and one or more loads connected to the load terminal. A conductor in which a side terminal, a fusible member provided across the power supply side terminal and the load side terminal are integrally formed in a flat plate shape, and a connection portion between the power supply side terminal and the other terminal of the load side terminal are exposed. A cover made of resin that covers the conductor is provided, the connection part of the power supply side terminal has a side part located along the edge of the cover, and the cover exposes both sides of the connection part of the power supply side terminal. In a fuse unit in which a notch that reaches the edge of the cover is formed, the notch has a bolt hole corresponding to the bolt hole of the power supply side terminal, and is fastened to overlap with the terminal surface of the power supply side terminal It must be formed in a structure that can hold the plate. And features.

  According to this, since the power supply side terminal can be reinforced by attaching the metal plate to the power supply side terminal according to the type and specification of the battery terminal, the power supply side terminal can be prevented from being damaged. In addition, when connecting the battery terminal bolt to the power supply side terminal, the metal plate overlaid on the power supply side terminal is held by the notch on the cover, so there is no need to hold the metal plate with your hand. Easy to do. In addition, when using the battery terminal with few unevenness | corrugations formed by press work etc., the bolt of a battery terminal can be connected without overlapping a metal plate on a power supply side terminal.

  In this case, a notch groove extending from the edge of the cover across the connection portion of the power supply side terminal is formed at a portion of the wall surface of the cutout portion that contacts at least one surface of the power supply side terminal. It can comprise so that the edge of a metal plate may be inserted in a notch groove. According to this, since a metal plate can be hold | maintained with the notch part of a cover, the operation | work which piles up and fastens a metal plate can be made easy. In addition, a notch groove can be formed in the part which touches both surfaces of the power supply side terminal of the wall surface of a notch part, respectively. According to this, since the metal plates can be mounted on both surfaces of the connection portion of the power supply side terminal, the strength of the power supply side terminal can be further improved.

  Moreover, the nail | claw latched by the side part of a power supply side terminal can be provided in a metal plate. According to this, since the metal plate can be locked at a desired position, the metal plate can be easily positioned.

  According to the present invention, it is possible to prevent damage to the power supply side terminal of the fuse element.

It is an exploded view which shows the fuse unit and battery terminal of one Embodiment of this invention. It is a perspective view of the state which connected the battery terminal to the fuse unit of FIG. It is a top view of the fuse unit of FIG. It is the perspective view which showed the formation method of the nail | claw of the reinforcement board of FIG. It is the side view which looked at the fuse unit of FIG. 1 from the power supply side terminal side. It is a perspective view which mounts a reinforcement board on the opposite side of a battery terminal, (a) is a perspective view before installation of a reinforcement board, and (b) is a figure after installation of a reinforcement board. It is a figure which shows the modification of a reinforcement board. It is a top view which shows the other structure which hold | maintains a reinforcement board. It is sectional drawing of the position of the rib of FIG.

(Embodiment)
Hereinafter, the present invention will be described based on embodiments. As shown in FIGS. 1 to 4, the fuse unit 1 of the present embodiment is connected to a battery post connected to a battery electrode (not shown) via a battery terminal 3. The fuse unit 1 includes a power supply side terminal 7 connected to the battery terminal 3 and a plurality (two in this embodiment) of load side terminals 9 and 11 to which load terminals connected to a load (not shown) are connected. , A conductive portion integrally formed in a flat plate shape with a metal, a soluble body (not shown) provided across the power supply side terminal 7 and the load side terminals 9 and 11, and the power supply side terminal 7 and the load side terminals 9 and 11. A resin cover 13 is provided which exposes the connection portions with the other terminals and covers both surfaces of the conductor portion.

  The battery terminal 3 includes a crimping hole 15 into which the battery post is inserted and a bolt 17 connected to the power supply side terminal 7 of the fuse unit 1. The caulking hole 15 includes an adjusting screw 19 that expands and contracts the caulking hole 15. Thereby, a cylindrical battery post is inserted into the crimping hole 15, the adjustment screw 19 is tightened to reduce the diameter of the crimping hole 15, and the battery terminal 3 can be connected to the battery post. The bolt 17 connected to the power supply side terminal 7 of the fuse unit 1 is erected on a plate portion 21 provided continuously to the crimping hole 15.

  The power supply side terminal 7 of the fuse unit 1 has a bolt hole 23 into which the bolt 17 of the battery terminal 3 is inserted, and the power supply side terminal 7 has a side portion 29 positioned along the edge of the cover 13. . The bolt hole 23 is inserted into the bolt 17 of the battery terminal 3 and fastened with a nut 27. Thereby, the fuse unit 1 and the battery terminal 3 are electrically connected. The load side terminals 9 and 11 have bolts 31 and 33 erected from the terminal surfaces, respectively. The bolts 31 and 33 are inserted into the bolt holes of the load terminals, fastened with nuts, and electrically connected to the load terminals. The power supply side terminal 7 and each load side terminal 9 and 11 are connected by the soluble body. The fusible body is blown when an overcurrent flows.

  The cover 13 has a notch 35 that exposes both surfaces of the connection portion of the power supply side terminal 7 to which the battery terminal 3 is connected and reaches the edge of the cover 13, and bolts 31 and 33 of the load side terminals 9 and 11. Openings 37 and 39 for exposing the erected surfaces, windows 41 and 43 through which a soluble body can be seen from the outside, and a heat radiating portion 45 are provided. The notch 35 is formed in a shape in which the cover 13 is notched in a U shape from the edge, and exposes both sides and the side 29 of the connection portion of the power-side terminal 7. The openings 37 and 39 are adapted to expose the terminal surfaces of the load side terminals 9 and 11 and the bolts 31 and 33. The windows 41 and 43 are formed at the position of the fusible body, covered with a transparent resin cover, and the fusible body can be visually observed through the cover. The heat radiating part 45 is formed by arranging a plurality of resin plates at intervals.

  Here, the characteristic configuration of the present embodiment will be described. In the present embodiment, a reinforcing plate 49 that is mounted on the terminal surface of the power supply side terminal 7 is provided. The reinforcing plate 49 is a rectangular metal plate and has a bolt hole 51 corresponding to the bolt hole 23 of the power supply side terminal 7. As a result, the power supply side terminal 7 can be overlapped with the power supply side terminal 7 with the bolt 17 and the nut 27. The reinforcing plate 49 is formed with two claws 52 that are engaged with the side portion 29 of the power supply side terminal 7. As shown in FIG. 4, the claw 52 is formed by bending a metal plate in a direction orthogonal to the reinforcing plate 49. The nail | claw 52 is formed in the side part 29 of the power supply side terminal 7 so that latching is possible. Thereby, the nail | claw 52 is latched to the power supply side terminal 7, and the reinforcement board 49 can be positioned in a desired position.

  On the other hand, the notch 35 of the cover 13 is formed in a structure capable of holding the reinforcing plate 49. Specifically, a notch groove 53 into which a side portion of the reinforcing plate 49 is inserted and held is formed on the wall surface 47 of the notch portion 35. The notch grooves 53 are formed at portions of the wall surface 47 of the notch 35 that are in contact with both surfaces of the power supply side terminal 7, and are formed by extending from the edge of the cover 13 across the connection portion of the power supply side terminal 7. ing.

  The characteristic action of this embodiment configured as described above will be described. When the fuse unit 1 and the battery terminal 3 are connected, whether to use the reinforcing plate 49 that reinforces the power supply side terminal 7 of the fuse unit 1 is selected according to the type and specification of the battery terminal 3. For example, when the plate portion 21 of the battery terminal 3 has few irregularities such as press working, the reinforcing plate 49 is not used. On the other hand, when a battery terminal such as a forging process in which the plate portion 21 of the battery terminal 3 has many irregularities and the contact area with the power supply side terminal 7 is small, the reinforcing plate 49 is used.

  When the reinforcing plate 49 is used, the reinforcing plate 49 is inserted from the edge of the cover 13 into the cutout groove 53 of the cutout portion 35 of the cover 13, and the reinforcing plate 49 is mounted on the power supply side terminal 7 in an overlapping manner. At this time, the nail | claw 52 provided in the rear end side of the insertion direction of the reinforcement board 49 is latched by the edge part 29 of the power supply side terminal 7, and the reinforcement board 49 is positioned. In this state, the bolt 17 of the battery terminal 3 is inserted into the bolt hole 23 of the power supply side terminal 7 of the fuse unit 1 and fastened with the nut 27. Thereby, since the reinforcing plate 49 can be overlapped and fastened to the power supply side terminal 7, the strength of the power supply side terminal 7 can be improved, and the power supply side terminal 7 can be prevented from being damaged by fastening the nut 27.

  According to this, since the power supply side terminal 7 can be reinforced by attaching the reinforcing plate 49 to the power supply side terminal 7 according to the type and specification of the battery terminal 3, damage to the power supply side terminal 7 can be prevented. Further, since the reinforcing plate 49 is held in the notch portion of the cover 13, it is not necessary to hold the reinforcing plate 49 with a hand or the like when connecting the fuse unit 1 and the battery terminal 3, and the connection work can be facilitated.

  In the present embodiment, the reinforcing plate 49 is attached to the battery terminal 3 side of the power supply side terminal 7, but as shown in FIG. 6, the reinforcing plate 49 is provided on the side opposite to the battery terminal 3 of the power supply side terminal 7. Can be installed. Also by this, the power supply side terminal 7 can be reinforced with the reinforcing plate.

  In this embodiment, the reinforcing plate 49 is attached to one side of the power supply side terminal 7, but the reinforcing plate 49 can be attached to both sides of the power supply side terminal 7. In this case, when the claw 52 of the reinforcing plate 49 is formed, the claw 52 collides with another reinforcing plate 49 and the reinforcing plate 49 cannot be mounted. Therefore, it is preferable to use the reinforcing plate 49 without the claws 52, or use the reinforcing plate 49 formed by bending a single metal plate into a U-shape as shown in FIG.

  Further, the notch groove 53 for holding the reinforcing plate 49 can be formed in a portion of the wall surface 47 of the notch portion 35 that is in contact with at least one surface of the power supply side terminal 7. Since the number of the reinforcing plates 49 attached can be changed by forming the terminals 7 on both sides, the strength of the power supply side terminal 7 can be easily adjusted.

  Moreover, although this embodiment forms two load side terminals 9 and 11 for connecting the load terminals, the number of load side terminals 9 and 11 is not limited to this and can be increased or decreased as appropriate.

  Moreover, although this embodiment demonstrated the structure which hold | maintains the reinforcement board 49 by the notch groove 53, as shown to FIG. 8, 9, the rib 61 which protrudes from the wall surface 47 of the notch part 35 is provided, and the reinforcement board 49 is provided. Can be configured to hold.

DESCRIPTION OF SYMBOLS 1 Fuse unit 3 Battery terminal 7 Power supply side terminal 9 Load side terminal 11 Load side terminal 13 Cover 17 Bolt 23 Bolt hole 29 Side part 35 Notch part 47 Wall surface 49 Reinforcement plate 51 Bolt hole 52 Claw
53 Notch Groove

Claims (3)

A power supply side terminal formed with a bolt hole connected to a bolt erected on the battery terminal, one or more load side terminals to which a load terminal is connected, and the power supply side terminal and the load side terminal And a cover made of a resin that covers the conductor by exposing the connecting portion of the conductor integrally formed in a flat plate shape and the other terminal of the power supply side terminal and the other terminal of the load side terminal. The connection portion of the power supply side terminal has a side portion positioned along an edge portion of the cover, and the cover exposes both sides of the connection portion of the power supply side terminal to expose the edge of the cover. In the fuse unit in which a notch part reaching the part is formed,
The notch has a bolt hole corresponding to the bolt hole of the power supply side terminal, and is formed in a structure capable of holding a metal plate that is fastened to be overlapped with the terminal surface of the power supply side terminal. Fuse unit to be used. The fuse unit according to claim 1, wherein
A notch groove extending from the edge of the cover across the connection portion of the power supply side terminal is formed in a portion of the wall surface of the notch portion that contacts at least one surface of the power supply side terminal,
The fuse unit is characterized in that the notch groove is formed so that an edge of the metal plate can be inserted. The fuse unit according to claim 2,
The fuse unit, wherein the metal plate has a claw that is engaged with the side portion of the connection portion of the power supply terminal.

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