JP4191571B2 - Fuse unit - Google Patents

Description

  The present invention relates to a fuse unit, for example, a fuse unit connected to a battery of an automobile.

Conventionally, a fuse unit as shown in FIG. 7 has been disclosed (see, for example, Patent Document 1).
As shown in FIG. 7, the fuse unit 100 connects a battery 101 and a power supply electric wire 111, and includes a conductive metal plate-like fuse element 118 having fuses 114 and 116, and the fuse. The element 118 has an insulating resin body 117 formed by insert molding. The resin body 117 has a front divided body 113 and a rear divided body 115, and both the divided bodies 113 and 115 are bent at a right angle. A fuse 114 that connects the connecting portion 104 of the battery terminal 102 and the alternator terminal 107 is disposed in the front divided body 113. Four fuses 116 are arranged in parallel on the rear divided body 115, and four tab terminals 120 are formed at the tip (lower tip in FIG. 7).

A battery terminal 102 is attached to a battery post 119 that is an electrode of the battery 101, and the fuse unit 100 engages the stud bolt 103 of the battery terminal 102 with the bolt insertion hole 104 a of the terminal connection portion 104 and tightens it with the nut 105. Connected. Further, the alternator terminal 106 and the starter motor terminal 107 are tightened and connected with a nut by engaging their insertion holes with stud bolts 110 protruding from the terminal connecting portions 108 and 109. The alternator terminal 106 and the starter motor terminal 107 are so-called terminals with electric wires, and the electric wires 111 are crimped and connected to a pair of crimping pieces 112. The fuse unit 100, the battery terminal 102, and the like are covered with a cover 121 from above to prevent entry of dust and moisture.
Therefore, when the fuse unit 100 is attached to the battery 101, the front divided body 113 is positioned horizontally on the upper surface of the battery 101, and the rear divided body 115 is vertically hung along the front surface 101a of the battery 101. .

Japanese Patent Laid-Open No. 2002-329457 (FIG. 9)

  By the way, since the number of tab terminals 120 is insufficient, there are cases where two or more fuse units 100 are desired to be attached. In such a case, it is conceivable to arrange the fuse units 100 side by side along the side surface of the battery 101. In this case, the distance from the battery post 119 may be too long, or it may be difficult to arrange the fuse units 100 side by side from the viewpoint of space. Therefore, it is conceivable that the fuse unit 100 is stacked and attached in a direction away from the battery 101.

  However, if the fuse units 100 are stacked in close contact with each other, the heat of the adjacent fuse units 100 is transmitted, and there is a possibility that the fuse 116 that is broken by heat does not function properly. Further, the laminated fuse unit 100 is likely to be shaken because it is separated from the battery 101, and the fuse unit 100 may be shaken by the vibration of the vehicle body and collide with the battery 101 or the adjacent fuse unit 100 to cause disconnection or damage. There is.

  The present invention has been made in view of the above-described problems, and an object thereof is to provide a fuse unit that functions normally without being affected by heat from an adjacent fuse unit and is resistant to vibration. is there.

  In order to achieve the above-described object, the present invention includes a mounting portion that is attached to a battery post of a battery and has an arm having a predetermined length, a housing that is bent at a right angle from the arm and faces the battery side surface, and one end. Has a fuse body that is electrically connected to the battery post and the other end is enclosed in the housing and forms a wire connecting portion via a soluble portion, and the housing is stacked in a direction away from the battery. In this case, a gap forming means for forming a gap between adjacent housings is provided in the housing.

  In the fuse unit configured as described above, when the attachment portion is attached to the battery post, the housing faces the side surface of the battery. At the same time, the fuse body contained in the mounting portion and the housing is electrically connected to the battery, and an electric wire connection portion is formed in the housing via the fusible portion. Such fuse units can be stacked in a direction away from the battery. When the fuse units are stacked, a gap is formed between the stacked fuse units by the gap forming means. Because of this gap, heat transfer between the mounted fuse units can be prevented, and the proper function of the fusible portion that is broken by the heat generated when an excessive current flows can be maintained. Further, when the battery is shaken, the gap forming means prevents the fuse units from colliding with each other, so that the fuse unit can be prevented from being damaged or disconnected.

  Further, the present invention is characterized in that the gap forming means is a protrusion provided in the stacking direction from the housing.

  In the fuse unit configured as described above, protrusions are stacked to form a gap between adjacent fuse units. Here, the protrusion may be provided in any one of the fuse units, but may be provided in both of the fuse units. Moreover, it is possible not only to be molded integrally with the housing but also to be attached later. Further, the shape of the protrusion is not limited and may be a rod-shaped member or a wall-shaped member.

  According to the present invention, even when stacked in a direction away from the battery, it can function normally without being affected by heat between adjacent fuse units, and can prevent the adjacent fuse units from colliding, thus being resistant to vibration. A fuse unit can be provided.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments according to the present invention will be described in detail based on the drawings. 1 is an exploded perspective view showing a state in which a fuse unit according to the present invention is attached to a battery, FIG. 2 is a plan view of the fuse unit, FIG. 3 is a side view of the fuse unit, FIG. 4 is a front view of the fuse unit, and FIG. (A)-(C) are explanatory drawings which show the example of arrangement | positioning of a processus | protrusion.
It is.

  FIG. 1 shows a case where two fuse units 10 a and 10 b according to an embodiment of the present invention are stacked in a direction away from the battery 11. Each of the fuse units 10a and 10b is attached to the battery post 12 as an electrode of the battery 11 and has mounting portions 20a and 20b having arms 21a and 21b having a predetermined length, and bent downward from the arms 21a and 21b at a right angle. The housing 30a, 30b facing the battery side surface 11a, one end of which is electrically connected to the battery post 12, and the other end is contained in the housing 30a, 30b and is a connector serving as a wire connecting portion via the soluble portion 41 And fuse bodies 40a and 40b forming 42.

  As shown in FIGS. 1 and 2, a battery terminal 13 is attached to the battery post 12. The starter terminal 14a attached to the end of the starter wire 14 and the attachment portion 20a of the first fuse unit 10a closest to the battery 11 are attached to the stud bolt 13a of the battery terminal 13. One end of the fuse body 40a is exposed at the mounting portion 20a, and the fuse body 40a and the battery 11 are electrically connected by being fastened to the stud bolt 13a with a nut 15a.

Two stud bolts 22a and 22b are provided on the upper surface of the news body 40 in the mounting portion 20a of the first fuse unit 10a. In the stud bolt 22a, an alternator terminal 23a attached to the tip of the alternator electric wire 23 is electrically connected by being stopped by a nut 15b. At the same time, a mounting portion 20b of the second fuse unit 10b is also connected by a nut 15b. Stopped. In the mounting portion 20b of the second fuse unit 10b, the fuse body 40b is exposed and is electrically connected to the mounting portion 20a of the first fuse unit 10a. The stud bolt 22b is electrically connected to the battery post 12 via the fuse 23 so that a current exceeding a predetermined value does not flow.
Note that the cover 17 is attached to the mounting portion 20a and the stud bolts 22a and 22b from the upper side, preventing problems such as contact failure and short circuit due to adhesion of dust and moisture.

  As shown in FIGS. 1 and 3, the fuse bodies 40a and 40b are bent 90 degrees downward from the ends of the arms 21a and 21b of the mounting portions 20a and 20b, and are insulated so as to cover the fuse bodies 40a and 40b. Housings 30a and 30b made of resin are integrally formed. The length of the arms 21a and 21b, that is, the length from the attachment portion with the battery post 12 to the point where the arm 21a and 21b are bent down by 90 degrees is appropriately set depending on the thickness of the housings 30a and 30b. The lower ends of the housings 30a and 30b are opened, and the tips of the fuse bodies 40a and 40b are exposed in the openings to form a female connector 42. Therefore, by inserting the male connector 16 attached to the tip of the electric wire 15 connected to the electric device into the connector 42, electric power can be supplied.

Although FIG. 4 shows a front view of the second housing 30b, the front view of the first housing 30a is the same, and therefore the second housing 30b will be described. The housing 30b is provided with a cavity 31 that is an internal space opened to the front surface. A fuse 43, which is a fusible body having a fusible portion 41, is provided at a position corresponding to the cavity 31 in the fuse main body 40b, and the battery 11 side and the connector 42 side of the fuse main body 40b are connected only through the fuse 43. Electrically connected.
It should be noted that the connector 42 side of the fuse 43 is electrically separated and extended to form the connector 42 independently.

  As shown in FIG. 3, when a plurality of fuse units 10 are stacked in the direction away from the battery 11 on the outer surface (side surface of the second fuse unit 10 b) of the housing 30 a of the first fuse unit 10 a, the adjacent housings. A protrusion 32 as a gap forming means for forming a gap 33 between 30a and 30b is provided in the stacking direction (left and right direction in FIG. 3). The shape of the protrusion 32 is not limited as long as the gap 33 is formed between the adjacent housings 30a and 30b. Therefore, it may be a simple protrusion, a rod-shaped member or a wall-shaped member. Moreover, not only when integrally molded with the housings 30a and 30b, it can be attached later.

  5A to 5C illustrate the installation positions of the protrusions 32. As shown in FIG. 5A, a protrusion 32 can be provided at the lower end of the housings 30a and 30b. In this case, what is necessary is just to provide in any one housing 30a, 30b, but it can also provide in both. Further, as shown in FIG. 5 (B), it can be provided on the upper portions of the housings 30a and 30b. Also in this case, it may be provided in either one of the housings 30a and 30b, but it can be provided in both. Furthermore, as shown in FIG. 5C, when three or more fuse units 10a, 10b, and 10c are stacked, for example, the inner side surface (right side surface in FIG. 5) or the outer side of each housing 30a, 30b, 30c. The protrusion 32 can be provided on the side surface (left side surface in FIG. 5). Or you may make it provide in the outer side surface (right side surface in FIG. 5) of each housing 30a, 30b, 30c. Furthermore, you may make it provide in the both outer surfaces of the housing 30b pinched | interposed. Furthermore, it can also be provided on both surfaces of each housing 30a, 30b, 30c.

  In manufacturing the fuse units 10a and 10b, the fuse bodies 40a and 40b including the fuse 43 having the fusible portion 41 are formed in a flat shape, and the fuse bodies 40a and 40b are attached to the housings 30a and 30b and attached by resin. After the parts 20a and 20b are integrally molded, the fuse bodies 40a and 40b can be bent downward at a right angle.

As described above, according to the fuse units 10a and 10b described above, the heat conduction can be blocked between the first housing 30a and the second housing 30b by the gap 33 formed by the protrusion 32. For this reason, even if the fusible part 41 of one fuse unit 10a (10b) generates heat, the other fuse unit 10b (10a) is prevented from being affected by heat, and the fusible part 41 operates normally and is predetermined. The above current can be prevented from flowing.
Further, when the housings 30a and 30b are shaken due to vibration of the battery 11 or the like, the protrusions 32 come into contact with the adjacent housings 30a and 30b, so that the housings 30a and 30b collide with each other and are damaged or disconnected. Can be prevented.

The fuse units 10a and 10b of the present invention are not limited to the above-described embodiments, and appropriate modifications and improvements can be made.
For example, in the above-described embodiment, the case where two fuse units 10a and 10b are stacked has been described. However, three or more fuse units 10a, 10b, and 10c (see FIG. 5C) can be stacked. It is.

  In the above-described fuse units 10a and 10b, the case where the connector 42 is provided at the front ends (lower ends) of the housings 30a and 30b has been described. However, like the fuse unit 10d shown in FIG. Alternatively, a terminal 44 connected by a screw 44a can be provided. In this case, the fuse unit 10d is limited to the uppermost stacked fuse unit 10d so that the work can be performed from the front, and the other fuse units 10a and 10b can be connected to the connector 16 from below as described above. Must be a unit.

  Further, the first fuse unit 10a closest to the battery 11 may also be provided with a protrusion 32 on the side of the battery 11 of the housing 30a. Thereby, when the battery 11 shakes, it can prevent that the housing 30a collides with the side surface 11a of the battery 11, and is damaged, or the connectors 42 and 16 fall off.

It is a disassembled perspective view which shows the state which attaches the fuse unit which concerns on this invention to a battery. It is a top view of a fuse unit. It is a side view of a fuse unit. It is a front view of a fuse unit. (A)-(C) are explanatory drawings which show the example of arrangement | positioning of a processus | protrusion. It is a front view which shows another example of a housing. It is a disassembled perspective view which shows the conventional fuse unit.

Explanation of symbols

10a, 10b Fuse unit 11 Battery 11a Battery side surface 12 Battery post 20 Mounting portion 21 Arm 30a, 30b Housing 32 Projection (gap forming means)
33 Gap 40a, 40b Fuse body 41 Fusible part 42 Connector (connection part)

Claims (2)

A mounting portion attached to the battery post of the battery and having an arm having a predetermined length, a housing formed by bending at right angles from the arm and facing the side of the battery, and one end electrically connected to the battery post and the other The end has a fuse body that is enclosed in the housing and forms a wire connection part via a fusible part,
The fuse unit is provided with a gap forming means for forming a gap between adjacent housings when the housings are stacked in a direction away from the battery.   2. The fuse unit according to claim 1, wherein the gap forming means is a protrusion provided in the stacking direction from the housing.

Images