JP2987545B2 - Fusible link block - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fusible link block for mounting a fuse connected between a battery and an electric device, and more particularly, to an incomplete cover for covering a battery terminal and a fuse on a block body. The present invention relates to a fusible link block for preventing engagement.

[0002]

2. Description of the Related Art Conventionally, a fusible link block for connecting a fuse between a battery of an automobile or the like and an alternator or between the battery and other electric equipment has been provided. As shown in FIG. 5, the fusible link block 51 includes a block body 52 and a bus bar 3.
And a connection part cover 4. Further, an outer cover 6 capable of opening and closing the terminal fixing portion 5 of the block main body 52 is provided on the block main body 52 so as to be slidable up and down.

The block main body 52 has a box-shaped fixed terminal portion 5 formed on the front and rear sides facing each other. A flexible lock arm 8 is formed on one of the side walls 7 orthogonal to the fixed terminal portion 5. ing. Further, the terminal fixing portion 5 is press-fitted with a nut 10 having a rectangular rotation preventing portion at the bottom of the concave portion 9. Further, the lock arm 8 is a flexible arm whose lower portion is fixed to the side wall 7 and protrudes upward, a locking convex portion 8a protrudes at an end portion, and a distal end portion 8b extends upward. Has been issued. The lock arm 8 constitutes a holding means 12 together with a stopper wall 11 described later formed on the outer cover 6.

The outer cover 6 has a rectangular cylindrical shape, and a guide portion 14 is formed by projecting an intermediate portion of one of the side walls 13 outward, and an inner edge of the guide portion 14 on one opening side. A stopper wall 11 protruding toward is formed. The guide 14 has a block body 52.
Is inserted. That is, the lock arm 8
When the locking projection 8a is engaged with the stopper wall 11, the closed state of the terminal fixing portion 5 of the block body 52 is maintained.

A fuse mounting opening 15 is formed in the upper part of the block body 52, and a fuse 16 is mounted in the fuse mounting opening 15. The fuse mounting opening 15 is in communication with the terminal fixing portion 5, and a terminal portion (not shown) of the mounted fuse 16 is connected to the terminal fixing portion 5.
It is designed to be inserted inside. A rotation support portion 17 for rotatably supporting the connection portion cover 4 is formed on the rear side of the fuse mounting opening 15, and a rotation support shaft 24, which will be described later, is detachably and slightly elastically held. Narrow opening 1
8 is provided diagonally on the upper rear side. A busbar support 19 is formed in front of the fuse mounting opening 15.

The bus bar 3 fixed to the bus bar supporting portion 19 is formed by bending a plate material into an L shape, and has a terminal portion (not shown) disposed on the terminal fixing portion 5 on the rear side. A connection portion 21 for connecting to the battery terminal 20 is formed on the front side. Further, the battery terminal 20 is provided with a post supporting portion 23 through which the battery post 22 is inserted. Battery terminal 20, post support 2
The busbar support 19 and the fuse 16 are covered by the connection cover 4 that is rotatably supported by the rotation support 17.

The connecting portion cover 4 has a pivot shaft 24 rotatably fitted to the pivot support portion 17 formed at the rear end, and a post cover portion 25 covering the battery post 22 at the front end. Is formed. A mounting opening cover 26 for closing the fuse mounting opening 15 is formed integrally between the rotation support shaft 24 and the post cover portion 25. Further, a lock arm cover 27 protrudes from one side wall in the width direction of the mounting opening cover 26.

As the locking means 28 of the connecting portion cover 4, locking projections 29 are provided outside both side walls of the bus bar supporting portion 19, and locking hooks corresponding to the locking projections 29 are provided. 30 are provided to protrude inside the both side walls of the connection portion cover 4. Further, protective walls 31 and 45 are provided on both sides of the lock arm 8 so as to extend vertically, and the upper end thereof matches the upper surface of the locked outer cover 6. Further, in order to fix the terminal 32 provided at the end of the electric wire W connected to the alternator and other electric devices, a bolt 3 screwed into the nut 10 is fixed.
3 are provided.

To assemble the fusible link block 51 having the above configuration, the terminal 3 crimped to the end of the electric wire W with the outer cover 6 lowered as shown in FIG.
2 is inserted from below and screwed and fixed to the nut 10 with the bolt 33. When the outer cover 6 is pushed up, the stopper wall 11 deflects the lock arm 8 and the locking projection 8a
Is engaged.

Next, after the post support portion 23 of the battery terminal 20 is connected and fixed to the battery post 22, the turning support shaft 24 of the connecting portion cover 4 is attached to the turning support portion 17 of the block main body 52 at an obliquely upper rear. The opening 18 is pressed and engaged. When the post cover 25 is rotated downward about the rotation support shaft 24, the locking hook 30 is locked by the locking projection 29, and the connecting portion cover 4 is locked by the block body 52. Is done. Therefore, the tip 8b of the lock arm 8 is also covered by the lock arm cover 27, and the battery post 2
2. The battery terminal 20, the fuse 16, and the lock arm 8 are protected by the connection cover 4.

[0011]

However, in the conventional fusible link block 51, even if the rotation support shaft 24 is not completely pressed and engaged with the rotation support portion 17 as shown in FIG. That is, the rotation support shaft 24 is
Even if it is arranged slightly behind the center of the
Is locked by the locking projection 29. Therefore, the connection portion cover 4 is locked to the block body 52 in an incomplete state. In the state described above, there is a problem that the connection portion cover 4 easily falls off from the block main body 52 due to vibration of the vehicle body or the like, and the battery terminal 20 and the fuse 16 are not protected.

SUMMARY OF THE INVENTION The object of the present invention has been made in view of the above-mentioned problems. When the rotation support shaft of the connecting portion cover is not completely engaged with the rotation support portion of the block body, the object of the present invention is as follows. An object of the present invention is to provide a fusible link block that can reliably detect an incompletely engaged state.

[0013]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a block main body to which a fuse and a bus bar are assembled, a rotatable support by the first locking means on the block main body, and a block when the cover is further covered. In a fusible link block to which a connecting portion cover having a second locking means for locking to a main body is attached, when the first locking means is incompletely engaged, the second locking means is locked. Can be achieved by a fusible link block characterized by comprising a detecting means for detecting an incompletely engaged state.

[0014] Further, the above object is attained in that the first locking means comprises a rotation support shaft provided on the connection part cover side and a rotation support part provided on the block body side, and the second locking means is provided. This is achieved by a locking hook provided on the connecting portion cover side and a locking projection provided on the block body side.

The above object is further achieved by the detection means comprising a protection wall provided in the vicinity of the lock arm and extending vertically and a wall of a lock arm cover covering the lock arm.

The above object is achieved by the detection means comprising an incomplete locking prevention piece provided behind the lock arm and a wall of the lock arm cover.

It is another object of the present invention to provide a block body having a fuse mounting opening for mounting a fuse and a terminal fixing portion, and having a lock arm for locking an outer cover covering the terminal fixing portion, A bus bar, which is assembled to the main body and has one end connected to the battery post via the battery terminal and the other end fixed to the fixed terminal portion, and a lock arm cover rotatably supported by the block main body and covering the lock arm. A fusible link block, comprising: a connection portion cover that covers the battery terminal and the fuse; wherein a locking hook on the connection portion cover side is locked by a locking projection on the block body side to lock the connection portion cover. When the rotation support shaft of the connection portion cover is incompletely engaged with the rotation support portion of the block body, the protection wall provided near the lock arm and the lock door are locked. By the wall portion of the Mukaba abuts, it can be achieved by the fusible link block, wherein the engagement of the locking projection of the latching ledges is prevented, incomplete engagement state is detected.

Further, the object of the present invention is to provide a block body having a fuse mounting opening for mounting a fuse and a terminal fixing portion 5 and having a lock arm for locking an outer cover covering the terminal fixing portion, A bus bar, which is assembled to the main body and has one end connected to the battery post via the battery terminal and the other end fixed to the fixed terminal portion, and a lock arm cover rotatably supported by the block main body and covering the lock arm. A fusible link block, comprising: a connection portion cover that covers the battery terminal and the fuse; wherein a locking hook on the connection portion cover side is locked by a locking projection on the block body side to lock the connection portion cover. An incomplete locking prevention piece provided near the lock arm when the rotation support shaft of the connection portion cover is incompletely engaged with the rotation support portion of the block body. This is achieved by the fusible link block characterized in that the wall of the lock arm cover abuts against the upper end, thereby preventing the locking hook from locking to the locking projection and detecting an incompletely engaged state. be able to.

[0019]

In the fusible link block having the above-mentioned structure according to the present invention, the fusible link block is provided for the lock arm when the rotation support shaft of the connection portion cover is incompletely engaged with the rotation support portion of the block body. When the wall portion of the lock arm cover comes into contact with the protection wall, the locking hook is prevented from locking to the locking protrusion, and the incompletely engaged state is detected. Thereby, the rotation support shaft of the connection portion cover is engaged with the rotation support portion, and when the rotation support shaft is rotated forward about the rotation support shaft, the locking hook of the connection portion cover is engaged with the locking projection of the block body. Locked. At this time, if the rotation support shaft is incompletely engaged with the rotation support portion,
The wall portion of the lock arm cover abuts on the protection wall of the block main body so that the connection portion cover cannot be locked, and an incomplete engagement state can be easily detected.

Further, the wall of the lock arm cover abuts against the upper end of the incomplete locking prevention piece provided near the lock arm, whereby the locking hook is prevented from being locked to the locking projection.
An incomplete engagement state is detected. Accordingly, when the rotation support shaft is incompletely engaged with the rotation support portion, the wall portion of the lock arm cover abuts against the upper end of the incomplete locking prevention piece of the block body, and the connection portion cover Cannot be locked, and an incomplete engagement state is easily detected. That is, the incompletely locked state of the rotation support shaft to the rotation support portion is easily detected, and the falling off of the connection portion cover due to vibration of the vehicle or the like is prevented.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a fusible link block according to the present invention will be described below in detail with reference to FIGS. FIG.
FIG. 2 is an exploded perspective view of the fusible link block of the present embodiment, and FIG. 2 is an operation explanatory view in FIG. In the fusible link block 1 according to the present embodiment, since the basic configuration of the conventional fusible link block 51 described above is the same except for the detection means, the same components are denoted by the same reference numerals, and description thereof will be omitted. Omitted.

As shown in FIGS. 1 and 2, a lock arm 8 for locking the outer cover 6 has a lower portion integrally fixed to the left side surface of the block body 2 and extends upward, and is formed as a cantilever. It is provided flexibly. A locking projection 8a is provided in the middle of the lock arm 8, and
The upper portion is provided with a pressing tip 8b for releasing the holding means 12 of the outer cover 6.

On both sides of the lock arm 8, a protective wall 3 is provided.
Reference numerals 1 and 34 extend vertically and are provided integrally on the left side surface of the block body 2. The upper end position of the rear protective wall 31 in the closed position of the outer cover 6 is different from that of the held outer cover 6.
Is the same position as the upper end position. However, an extension 35 is provided on the front protection wall 34, and the upper end is provided higher than the protection wall 31 by the dimension X as shown in FIG. 2. Accordingly, the detecting means 36 is constituted by the extension 35 of the protection wall 34 and the front side wall 27a of the lock arm cover 27.

The position of the front side wall portion 27a of the lock arm cover 27 provided on the rear side surface of the connection portion cover 4 is such that the rotation support shaft 24 is completely pressed and engaged with the rotation support portion 17 from the opening 18. If the connection portion cover 4 is turned forward, the connection portion cover 4 is provided at a position where the connection portion cover 4 passes without interfering with the extension portion 35 when the connection portion cover 4 is rotated forward. However, when the rotation support shaft 24 is pressed and engaged with the rotation support portion 17 in an incomplete state, the connection portion cover 4 including the rotation support shaft 24 is located behind the center axis of the rotation support portion 17. It will be located closer. If the connection cover 4 rotates forward in this state, the front wall portion 27a abuts on the upper end of the extending portion 35 and the rotation is prevented.

With the above configuration, when the rotation support shaft 24 is incompletely pressed and engaged with the rotation support portion 17, even if the connection portion cover 4 is rotated forward, the front of the lock arm cover 27 can be maintained. The side wall 27a comes into contact with the upper end of the extension 35 of the protection wall 34, and cannot be rotated. Therefore, the locking hook 30 of the locking means 28 is not locked by the locking protrusion 29, and
Is detected to be pressed and engaged with the rotation support 17 in an incomplete state, and until the rotation support shaft 24 is pressed and engaged with the rotation support 17 in a normal state. Will be engaged.

Next, a fusible link block according to a second embodiment of the present invention will be described in detail with reference to FIGS. FIG. 3 is an exploded perspective view showing the fusible link block of the present embodiment, and FIG. 4 is an operation explanatory view in FIG. As shown in FIGS. 3 and 4, a lock arm 8 for locking the outer cover 6 has a lower portion integrally fixed to the left side surface of the block body 42 and extends upward, and is flexible as a cantilever. It is provided in. A locking projection 8a is provided in the middle of the lock arm 8, and a pressing tip 8b for releasing the holding means 12 of the outer cover 6 is provided on the upper part.
Is provided.

On both sides of the lock arm 8, a protective wall 3 is provided.
1, 45 extend vertically and are integrally provided on the left side surface of the block body 42. The upper end positions of these protective walls 31 and 45 are the same as the upper end positions of the outer cover 6 held with the outer cover 6 closed. In the vicinity of the rear of the protective wall 31, there is provided an incomplete locking prevention piece 43 whose lower part is integrally fixed to the left side surface of the block body 42 and whose upper part is extended. The position of the upper end of the incomplete locking prevention piece 43 is substantially the same as the upper end of the tip 8 b of the lock arm 8.

The position of the rear side wall portion 27b of the lock arm cover 27 provided on the rear side surface of the connection portion cover 4 is such that the rotation support shaft 24 presses the rotation support portion 17 from the opening 18 in a normal state. When engaged, the connecting portion cover 4 does not interfere with the incomplete locking preventing piece 43 when the connecting portion cover 4 is rotated forward, and descends and passes between the protective wall 31 and the incomplete locking preventing piece 43. It is provided at a position where

However, when the rotation support shaft 24 is pressed and engaged with the rotation support portion 17 in an incomplete state, the connection portion cover 4 including the rotation support shaft 24 is positioned at the center of the rotation support portion 17. It will be located backward with respect to the axis. In this state, when the connection portion cover 4 is rotated forward, the rear side wall portion 27b
Contact the upper end of the incomplete locking prevention piece 43.
Therefore, the incomplete locking prevention piece 43 and the lock arm cover 2
The detection means 44 is constituted by the rear wall portion 27b of the seventh detection member 7.

According to the above configuration, when the rotation support shaft 24 is pressed and engaged with the rotation support portion 17 in an incomplete state, even if the connection portion cover 4 is rotated forward, the lock arm cover 27 is rotated. The rear side wall portion 27b abuts on the upper end of the incomplete locking prevention piece 43 and cannot rotate. Therefore, the locking hook 30 of the locking means 28 cannot be locked on the locking projection 29 and the rotation support shaft 2
The detecting means 44 detects that the rotation support shaft 4 is incompletely pressed and engaged with the rotation support portion 17, and re-engages the rotation support shaft 24 until the rotation support shaft 24 is normally pressed and engaged with the rotation support portion 17. Are combined. This reliably prevents the connection cover 24 from falling off due to incomplete engagement of the rotation support shaft 24 with the rotation support portion 17. It should be noted that the present invention is not limited to the above-described embodiment, and can be implemented in other modes by making appropriate changes. For example, in the present embodiment, the opening 18 is provided on the upper rear side of the rotation supporting section 17, but if the opening 18 is rearward from the upper rear side and further in the range of the lower rear side, there is no problem as long as it can respond sufficiently. It is.

[0031]

As described above, according to the fusible link block of the present invention, when the rotation support shaft of the connection portion cover is incompletely engaged with the rotation support portion of the block body,
When the wall of the lock arm cover abuts on the upper end of the protection wall provided for the lock arm or on the upper end of the incomplete lock prevention piece provided near the lock arm, the locking hook engages with the locking projection. The stop is prevented, and the incompletely engaged state is detected. Therefore, an incomplete engagement state of the connection portion cover is detected, and an attempt is made until the connection portion cover is engaged in a normal state. This reliably prevents the connection portion cover from dropping off from the block main body due to the vibration of the vehicle or the hook during the work, thereby exposing the battery terminals and the fuses to the exposed state, thereby improving the reliability of the connection portion cover. be able to.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of a fusible link block of the present invention.

FIG. 2 is an operation explanatory diagram in FIG.

FIG. 3 is an exploded perspective view showing a fusible link block according to a second embodiment of the present invention.

FIG. 4 is an operation explanatory diagram in FIG. 3;

FIG. 5 is an exploded perspective view showing a conventional fusible link block.

FIG. 6 is an operation explanatory diagram in FIG. 5;

[Explanation of symbols]

 1, 41 fusible link block 2, 42 block body 3 bus bar 4 connecting portion cover 5 terminal fixing portion 6 outer cover 8 lock arm 8a locking convex portion 11 stopper wall 12 holding means 15 fuse mounting opening 16 fuse 17 rotation support portion DESCRIPTION OF SYMBOLS 18 Opening part 19 Busbar support part 20 Battery terminal 22 Battery post 24 Rotating support shaft 27 Lock arm cover 27a Front side wall part 27b Rear side wall part 28 Locking means 29 Locking projection 30 Locking hook 31, 34, 45 Protective wall 32 Terminal 35 Extension 36,44 Detecting means 43 Incomplete locking prevention piece W Electric wire

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H01H 85/02 H01H 85/22 H01H 85/54-85/56 H01M 2/34

Claims (6)

(57) [Claims] 1. A block body to which a fuse and a bus bar are attached, and a second member for being rotatably supported by the first locking means on the block body and locked to the block body when further covered. In a fusible link block to which a connection portion cover having a stopping means is attached, when the first locking means is incompletely engaged, the second locking means is provided.
A fusible link block comprising: a detection unit configured to detect the incompletely engaged state by preventing locking of the locking unit. 2. The second locking means, wherein the first locking means comprises a rotation support shaft provided on the connection part cover side and a rotation support part provided on the block body side. 2. The fusible link block according to claim 1, wherein the fusible link block comprises a locking hook provided on the connection portion cover side and a locking projection provided on the block body side. 3. The fuse according to claim 1, wherein said detecting means comprises a vertically extending protective wall provided near said lock arm and a wall of a lock arm cover covering said lock arm. Bull link block. 4. The fusible link block according to claim 1, wherein said detecting means comprises an incomplete locking preventing piece provided behind said lock arm and a wall of said lock arm cover. 5. A block body having a fuse mounting opening for mounting a fuse and a terminal fixing portion, a lock body having a lock arm for locking an outer cover covering the terminal fixing portion, and one end attached to the block body. Is connected to a battery post via a battery terminal, the other end is fixed to the fixed terminal portion, and a lock arm cover rotatably supported by the block body and covering the lock arm, the battery includes A fusible link block, comprising: a connection portion cover that covers the terminal and the fuse; wherein a locking hook on the connection portion cover side is locked by a locking projection on the block body side to lock the connection portion cover. A protection provided near the lock arm when the rotation support shaft of the connection portion cover is incompletely engaged with the rotation support portion of the block body. And the wall portion of the lock arm cover abuts, whereby the locking hook is prevented from locking to the locking projection, and the incompletely engaged state is detected. . 6. A block main body having a fuse mounting opening for mounting a fuse and a terminal fixing portion, a lock body having a lock arm for locking an outer cover covering the terminal fixing portion, and one end attached to the block main body. Is connected to a battery post via a battery terminal, the other end is fixed to the fixed terminal portion, and a lock arm cover rotatably supported by the block body and covering the lock arm, the battery includes A fusible link block, comprising: a connection portion cover that covers a terminal and a fuse; wherein a locking hook on the connection portion cover 4 side is locked by a locking projection on the block body side to lock the connection portion cover. When the rotation support shaft of the connection portion cover is incompletely engaged with the rotation support portion of the block main body, a non-rotational shaft provided near the lock arm is provided. When the wall of the lock arm cover abuts against the upper end of the full lock prevention piece, the lock hook is prevented from being locked to the lock projection, and the incompletely engaged state is detected. A fusible link block that features.