JP5872858B2 - Fuse unit - Google Patents

Description

  The present invention relates to a fuse unit including a fusible portion that is directly attached to a battery mounted on a vehicle and supplies power from the battery to an electric wire.

  Conventionally, a fuse unit for connecting a battery mounted on a vehicle and a power supply wire has been bent in an L shape from the time of molding. Therefore, there has been developed one that is divided into front and rear divided bodies while being stretched in a one-dimensional direction, and is used in a state where the divided body is bent in an L shape from the middle when used (for example, Patent Document 1 and (See Patent Document 2 etc.).

  In the fuse unit 501 shown in FIG. 8, a regulation wall 507 facing the inner wall 505 of one divided body 503 is erected on the inner wall 511 of the other divided body 509. The regulating wall 507 is provided with an inclined wall surface 513 that is inclined in a direction away from the inner surface wall 505 of one divided body 503. Falling prevention ribs 515 are provided at both ends of the restriction wall 507. One split body 503 is provided with a flexible arm 519 having a hook 517, and the restriction wall 507 of the other split body 509 is provided with a notch 521 to constitute a first locking means. The One split body 503 is provided with a locking projection, and the other split body 509 is provided with an engaging groove 523 for the locking projection to constitute a second locking means. The engagement grooves 523 are respectively provided on the extending walls 529 from the side walls 525 and 527 of the other divided body 509. With such a configuration, the fuse unit 501 improves the reliability of the locking means of the fuse unit 501 and maintains an L-shaped bent form.

  Further, the fuse unit 531 shown in FIG. 9 is formed in each of the divided bodies 533 and 535, and in the crossing direction of the opposing wall portions 539 and 541 facing each other at the hinge portion 537 of the fuse element, and the opposing wall portions 539 and 541. Side wall portions 543, 545, 547, and 549 extending on both sides, lock arms 551 and 553 provided on the side wall portions 543 and 545 on both sides of the split body 533, and the first inclined surface 555 provided on the lock arms 551 and 553, respectively. (557) formed on the lock projections 559, 561, convex portions 563, 565 provided on the side wall portions 547, 549 on both sides of the divided body 535 so as to correspond to the lock projections 559, 561, and the convex portions 563, respectively. The first inclined surface 5 is provided in the divided body 535 so as to correspond to 565, and when each divided body 533, 535 is bent. 5 (557) comprises a second inclined surface 567 is a surface alignment. With such a configuration, the springback load from the built-in fuse element can be reliably received, and the bent state of the divided bodies 533 and 535 is maintained to prevent the resin body from being damaged.

JP 2002-329457 A JP 2011-81912 A

  However, in the conventional fuse unit 501 and fuse unit 531 described above, the locking means engages only in the approaching direction, so that external force is applied during transportation, vehicle assembly process, or mounting on the actual vehicle, and the split body 503 and When the split body 509 or the split body 533 and the split body 535 move relative to each other in the direction to release the lock, the lock that holds the L-shaped bent form is released, and the L-shaped bent state cannot be held. Moreover, there exists a possibility that an L-shaped bending part may fracture | rupture.

  The present invention has been made in view of the above situation, and an object of the present invention is to provide a fuse unit that is hard to be unlocked and can reliably hold a bent state.

The above object of the present invention is achieved by the following configuration.
(1) A conductive fuse element having a plurality of fusible parts and having a hinge part formed in an intermediate part, and an insulating resin body containing the fuse element, wherein the resin body is A fuse unit that is formed by a first body and a second body that are divided with a hinge portion as a boundary, and wherein the first body and the second body can be bent around the hinge portion; Formed on the first body and extending on a first side wall on both sides extending in a direction intersecting the rotation center of the hinge part, and formed on the second body and extending in a direction intersecting the rotation center of the hinge part. Second side wall portions on both sides, a pair of first lock arms respectively extending on the first side wall portions, and a first locked portion of the first lock arm provided on the second side wall portions. A first locking portion to stop; A pair of second lock arms respectively extending on the second side wall portion; a second locking portion provided on the first side wall portion for locking the second locked portion of the second lock arm; A fuse unit comprising:

According to the fuse unit configured as described in (1) above, the bent first body and the second body are the first locked portion of the first lock arm extending on the first side wall of the first body. Is locked to the first locking portion provided on the second side wall portion of the second body, and the second locked portion of the second lock arm extending to the second side wall portion of the second body. Is locked to the second locking portion provided on the first side wall portion of the first body.
Therefore, an external force acts on the first body and the second body, and the first locked portion of the first lock arm provided on the first body is first unlocked in a direction in which the first locked portion is released from the first locking portion of the second body. When the body and the second body are relatively displaced, the second locking portion of the first body is displaced in the locking direction for locking the second locked portion of the second lock arm provided on the second body. Further, an external force acts on the first body and the second body, and the second locked portion of the second lock arm provided on the second body is first in the unlocking direction in which the second locked portion is released from the second locking portion of the first body. When the body and the second body are relatively displaced, the first locking portion of the second body is displaced in a locking direction for locking the first locked portion of the first lock arm provided on the first body.
That is, when a force in the unlocking direction is applied to one lock arm, a force in the locking direction is applied to the other lock arm, so that the locks by the first and second lock arms are difficult to release. Accordingly, the bent state of the first body and the second body can be stably maintained.

(2) In the fuse unit configured as described in (1) above, the second lock arm overlaps the outside of the first lock arm when the first body and the second body are bent. A fuse unit characterized in that it is configured.

  According to the fuse unit configured as described in (2) above, the second lock arm in which the second locked portion is locked to the second locking portion of the first body overlaps the outside of the first lock arm. By comprising, the length extended from a 2nd side wall part can be shortened.

  According to the fuse unit of the present invention, it is difficult to release the lock, and the bent state can be reliably maintained.

  The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through a mode for carrying out the invention described below (hereinafter referred to as “embodiment”) with reference to the accompanying drawings. .

It is a perspective view before the bending of the fuse unit which concerns on one Embodiment of this invention. (A) is the principal part top view of the fuse unit shown in FIG. 1, (b) is the side view of (a), (c) is the bottom view which looked at (b) from the lower side. (A) is the A section top view of FIG. 1, (b) is BB arrow sectional drawing of (a). 2A is a perspective view of FIG. 2C rotated by 180 °, FIG. 2B is a perspective view showing a state where the second body in FIG. 2A starts to bend, and FIG. It is a perspective view which shows the state which the bending with the 2nd body was completed. It is a perspective view of the L-shaped bending state of the fuse unit shown in FIG. It is a principal part side view of the fuse unit shown in FIG. It is CC sectional view taken on the line of FIG. It is a perspective view of the conventional fuse unit in a L-shaped bending state. It is a perspective view of the other conventional fuse unit in the unfolded state.

Embodiments according to the present invention will be described below with reference to the drawings.
The fuse unit 11 according to the present embodiment connects a battery (not shown) and a power supply electric wire (not shown), and is a conductive metal plate having fuses 13 and 15 which are fusible parts. Fuse element 17 and an insulating resin body 19 in which the fuse element 17 is insert-molded. The fuses 13 and 15 are located in the vacant portion 41 of the resin body 19 and are mounted with a metal chip made of an alloy such as tin or lead as a constituent material.

  The fuse unit 11 shown in FIGS. 1 to 3 is in a state of being stretched in a one-dimensional direction at the time of molding, but is bent approximately 90 degrees from an intermediate portion to be in an L-shaped bent state when used (see FIG. 5). The reason why the molding is performed in a state of extending in one dimension is to facilitate a process such as die cutting.

  The fuse element 17 is formed by punching from a single conductive metal plate, and can be bent with the hinge portion 21 (see FIG. 6) at the intermediate portion as a rotation center 23. Further, the hinge portion 21 is exposed to the outside of the resin body 19 by being formed in a portion (a gap portion 25 of the resin body 19 shown in FIG. 2B) where the resin material of the resin molding die is not injected. ing.

  As shown in FIGS. 1 and 5, five tab terminals 27 are arranged in parallel at the end of the fuse element 17 that is arranged perpendicular to the hinge 21. Each tab terminal 27 continues to the fuse 15 exposed from the resin body 19. The tab terminal 27 protrudes into the connector fitting chamber 31 of the female connector housing 29 integral with the resin body 19. The tab terminal 27 and the female connector housing 29 constitute a female connector 33.

  The fuse element 17 arranged horizontally includes a battery connection part 35 for a battery terminal, a starter connection part 37 for a starter motor terminal, and an alternator connection part 39 for an alternator terminal. A fuse 13 is provided between the battery connection portion 35 and the alternator connection portion 39.

  The resin body 19 is divided into portions constituting the first body 43 and the second body 45 with the intermediate gap portion 25 as a boundary. From the gap portion 25, the hinge portion 21 of the fuse element 17 described above is exposed, so that the fuse element 17, that is, the entire fuse unit 11 can be bent.

  FIG. 1 is a view showing a state before the fuse unit 11 is bent, and the first body 43 and the second body 45 extend in a one-dimensional direction. By molding in this way, the battery connection part 35, the starter connection part 37, the alternator connection part 39, and the vacant part 41 of the resin body 19 are removed in the direction of 180 degrees, and the structure of the mold is Simplified and easy to mold.

  The resin body 19 is divided into a first body 43 positioned in the horizontal direction and a second body 45 positioned in the vertical direction. In the state where the second body 45 shown in FIG. It hangs along the side wall surface.

  The battery connection part 35, the starter connection part 37, and the alternator connection part 39 are each formed corresponding to the shape of the counterpart terminal, and have a rectangular shape or a combination of a rectangular shape and a semicircular shape. A stud bolt 47 is inserted at substantially the center of the starter connecting portion 37 and the alternator connecting portion 39 at the time of insert molding, and the shaft portion 49 protrudes vertically.

  The first body 43 is formed with first side wall portions 51 on both sides extending in a direction intersecting the rotation center 23 of the hinge portion 21, and the second body 45 intersects with the rotation center 23 of the hinge portion 21. Second side wall portions 53 on both sides extending in the direction are formed.

A pair of first lock arms 55 are extended on the first side wall 51 of the first body 43 in parallel with the first body 43 and the second body 45 in the deployed state. The 1st lock arm 55 protrudes toward the 2nd body 45 from the 1st side wall part 51, and the protrusion front end side becomes a free end. The first lock arm 55 has a thin wall shape to some extent, and thereby is given flexibility to bend in the thickness direction (direction along the rotation center 23).
A first locked portion 57 projects from the inner side of the projecting tip of the first lock arm 55 (see FIGS. 2A and 2C). The first locked portion 57 of the first lock arm 55 extending from the first body 43 is close to the second side wall portion 53 of the second body 45.

  As shown in FIG. 3B, when the first body 43 and the second body 45 are bent into an L shape, the second side wall 53 of the second body 45 has a first lock arm 55. A first locking portion 59 that locks the first locked portion 57 is formed. That is, the first locking part 59 is recessed in the second side wall part 53.

  On the other hand, a pair of second lock arms 61 are suspended from the second side wall 53 of the second body 45 in a direction orthogonal to the first body 43 and the second body 45 in the deployed state. The second lock arm 61 assumes a horizontal posture along the first side wall 51 when the first body 43 and the second body 45 are in an L-shaped bent state. As for the 2nd lock arm 61, the drooping front end side turns into a free end. The second lock arm 61 is also thin to a certain extent, and thereby is given flexibility to bend in the thickness direction (direction along the rotation center 23).

  The second lock arm 61 of the present embodiment is configured to overlap the outside of the first lock arm 55 when the first body 43 and the second body 45 are bent. A second locked portion 65 protrudes from the inside of the hanging tip of the second lock arm 61 (see FIGS. 2A and 2C). The second locked portion 65 of the second lock arm 61 extending from the second body 45 is close to the first side wall portion 51 of the first body 43 in an L-shaped bent state.

  As shown in FIG. 2B, when the first body 43 and the second body 45 are bent into an L shape, the first side wall 51 of the first body 43 has a second lock arm 61. A second locking portion 67 that locks the second locked portion 65 is formed. That is, the second locking part 67 is recessed in the first side wall part 51.

Thus, in the fuse unit 11, the first body 43 and the second body 45 can be bent in an L shape via the hinge portion 21. A pair of first lock arms 55 project from the first side wall portions 51 on both sides of the first body 43 so as to sandwich the second body 45, and the second side wall portion 53 of the second body 45 has a first side wall portion 53. A first locking portion 59 that locks the first locked portion 57 of the one lock arm 55 is formed.
On the other hand, a pair of second lock arms 61 project from the second side wall portions 53 on both sides of the second body 45 so as to sandwich the first body 43 from the outside of the first lock arm 55. The first side wall 51 is formed with a second locking portion 67 that locks the second locked portion 65 of the second lock arm 61.

  In addition, the first locked portion 57 of the first lock arm 55 and the second locking portion 67 of the first side wall 51 are provided with a first locked surface 69 perpendicular to the first side wall 51 (see FIG. 4A). )) And a second locking surface 71 (see FIG. 1). Further, the second locked portion 65 of the second lock arm 61 and the first locking portion 59 of the second side wall 53 are provided with a second locked surface 73 perpendicular to the second side wall 53 (FIG. 4A). )) And the first locking surface 75 (see FIG. 3B). The extension lines 77 (see FIG. 6) of the first locked surface 69 and the first locking surface 75, and the second locked surface 73 and the second locking surface 71 are aligned with the hinge portion. It is formed so as to substantially coincide with the rotation center 23 of 21.

Next, the operation of the fuse unit 11 having the above configuration will be described.
As shown in FIG. 4A, in the unfolded state, the fuse unit 11 has the first lock arm 55 with the first locked portion 57 facing inward from the first body 43 toward the second body 45. It is extended. On the other hand, from the second body 45, a second lock arm 61 with the second locked portion 65 facing inward is suspended in a direction perpendicular to the first lock arm 55.

  The fuse unit 11 has a first body as shown in FIG. 4 (b) from the unfolded state shown in FIG. 4 (a) with the hinge portion 21 as the rotation center 23 before transport or before vehicle assembly. 43 and the second body 45 are rotated so as to be relatively L-bent. Then, the first locked portion 57 of the first lock arm 55 approaches the second side wall portion 53 of the second body 45, and the second locked portion 65 of the second lock arm 61 is moved to the first body 43. Approaches the first side wall 51. The first locking part 59 of the second side wall part 53 is located in front of the first locked part 57 in the moving direction. The second locking portion 67 of the first side wall 51 is positioned in front of the second locked portion 65 in the moving direction.

  As shown in FIG. 4C, when the first body 43 and the second body 45 are in an L-shaped bent state, the first locked portion 57 of the first lock arm 55 becomes the second side wall of the second body 45. The first locking portion 59 provided in the portion 53 is locked (see FIG. 7). At the same time, the second locked portion 65 of the second lock arm 61 is locked to the second locking portion 67 provided on the first side wall portion 51 of the first body 43.

Therefore, in the fuse unit 11 according to the present embodiment, the first lock arm 55 is locked to the second body 45 and the second lock arm 61 is locked to the first body 43 to lock each other. Locked in state.
As shown in FIG. 7, an external force acts on the first body 43 and the second body 45, and the first locked portion 57 of the first lock arm 55 provided on the first body 43 serves as the first body 45 of the second body 45. When the first body 43 and the second body 45 are relatively displaced in the unlocking direction F <b> 1, which is disengaged from the locking portion 59, the second locking arm 61 provided on the second body 45 is connected to the second locking portion 67 of the first body 43. The second locked portion 65 is displaced in the locking direction for locking. An external force is applied to the first body 43 and the second body 45, and the second locked portion 65 of the second lock arm 61 provided on the second body 45 is released from the second locking portion 67 of the first body 43. When the first body 43 and the second body 45 are relatively displaced in the release direction F <b> 2, the first locking portion 59 of the second body 45 is the first locked portion of the first lock arm 55 provided on the first body 43. It is displaced in the locking direction for locking 57.

  That is, when a force in the unlocking direction is applied to one lock arm 55 (61), a force in the locking direction is applied to the other lock arm 61 (55). The lock is difficult to release. Therefore, the bent state of the first body 43 and the second body 45 can be stably maintained.

  Further, according to the fuse unit 11 of the present embodiment, each of the first locked surface 69 and the first locking surface 75 and the second locked surface 73 and the second locking surface 71 are aligned. Since the extension line 77 coincides with the rotation center 23 of the hinge portion 21, the reaction force of the spring back of the fuse element 17 based on the bending of the first body 43 and the second body 45 can be reliably received. The bent state of the first body 43 and the second body 45 can be held more stably.

  As described above, according to the fuse unit 11 according to the present embodiment, the first and second lock arms 43 and 45 are not easily unlocked, and the bent state of the first body 43 and the second body 45 is reliably maintained. This can prevent the hinge 21 and the like from being damaged.

Note that the fuse unit of the present invention is not limited to the above-described embodiment, and can be appropriately modified and improved. In addition, the material, shape, dimensions, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.
For example, in the above embodiment, when the first body 43 and the second body 45 are bent, the second lock arm 61 is formed so as to overlap the outside of the first lock arm 55, whereby the second side wall is formed. Although the length of the second lock arm 61 extending from the portion 53 is shortened, the first lock arm 55 and the second lock arm 61 may be formed so as not to overlap each other.

11 ... fuse units 13, 15 ... fuse (soluble part)
DESCRIPTION OF SYMBOLS 17 ... Fuse element 19 ... Resin body 21 ... Hinge part 23 ... Center of rotation 43 ... 1st body 45 ... 2nd body 51 ... 1st side wall part 53 ... 2nd side wall part 55 ... 1st lock arm 57 ... 1st cover Locking portion 59 ... first locking portion 61 ... second lock arm 65 ... second locked portion 67 ... second locking portion 69 ... first locked surface 71 ... second locking surface 73 ... second Locked surface 75 ... first locking surface 77 ... extension line

Claims (2)

A conductive fuse element having a plurality of fusible parts and having a hinge part formed in the middle part, and an insulating resin body incorporating the fuse element, the resin body comprising the hinge part A fuse unit formed by a first body and a second body divided at a boundary, wherein the first body and the second body can be bent around the hinge portion;
First side wall portions on both sides formed in the first body and extending in a direction intersecting with the rotation center of the hinge portion;
Second side wall portions on both sides formed in the second body and extending in a direction intersecting the rotation center of the hinge portion;
A pair of first lock arms respectively extending on the first side wall;
A first locking portion provided on the second side wall for locking the first locked portion of the first lock arm;
A pair of second lock arms respectively extending on the second side wall;
A fuse unit, comprising: a second locking portion that is provided on the first side wall portion and locks a second locked portion of the second lock arm. The fuse unit according to claim 1,
The fuse unit, wherein the second lock arm is configured to overlap an outer side of the first lock arm when the first body and the second body are bent.

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