JPH09115415A - Cover retaining structure for fusible link block - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a shaft part to be inserted into an opening part easily to thereby prevent brakage of a support shaft part and a receiving part by providing the opening part larger than the dia. of the shaft part in the slantly lower direction of the receiving part. SOLUTION: A support shaft part 29 is formed at one end of a cover 27 and a cylindrical shaft part 31 is fixed between two protecting support wall parts formed integrally with both sides of outer wall of a cover 27. A receiving part 32 is formed integrally with the outer circumference of a block body 26 and an opening part 34 is formed towards the slantly lower direction. The size of the opening L3 is set larger than the dia. L4 of the shaft part 31, and the shaft part 31 can be easily inserted and supported in the opening 34 and connected to the block body 26 so that it can rotate freely. A closing part is formed at an upper end of an outer cover 36 in an integrated manner therewith, and it closes the opening part 34 of the receiving part 32 with a terminal fixing part being covered and the shaft part 31 is stored to be rotatable freely. In this way deformation or brakage of the receiving part and separation of the cover are prevented, resulting in improvement of workability.

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 cover holding structure for mounting a fuse connected between a battery and an electric device.

[0002]

2. Description of the Related Art FIGS. 6 to 8 show Japanese Patent Application No. 5-33159.
As No. 0, the fusible link block 1 filed by the applicant on December 27, 1993 is shown.

The fusible link block 1 includes a block body 2 formed of resin, a block post 2 having one end connected to a battery post 3 and the other end having a terminal 5 of a fuse 4 and a terminal 7 of an electric wire 6. The busbar 8 is fastened and fixed together, the connecting portion cover 10 for covering the fuse 4 and the busbar 8 mounted on the fuse mounting portion 9, and the tubular outer cover 11 formed separately from the block body 2 are provided. There is.

The block body 2 has a box-like shape with an open lower surface, and has terminal fixing portions 12 and 12 (only one side is shown) on both side surfaces. Each terminal fixing portion 12 is formed in a recess 13 having a pair of side walls, and the terminal fixing portions 12 on both sides are
12 are back-to-back via a partition wall 14 forming the bottom surface of the recess 13.

A partition wall 14 forming the bottom surface of the recess 13 is provided with a holding portion 16 for a nut 15. The holding portion 16 of the nut 15 includes a holding groove (not shown) into which the rectangular plate-shaped detent portion 17 of the nut 15 is press-fitted, and a pair of parallel holding walls 18 (one of which is one end) facing each other with a space therebetween. The holding groove is formed between the holding wall 18 and the partition wall 14 by disposing a pair of holding walls 18 on the front surface of the partition wall 14 at intervals. And
When the nut 15 is attached to the holding portion 16, the pair of holding walls 1
The main body portion 19 of the nut 15 is exposed from between the opposed front edges of the bolt 8, and the tip of the bolt 20 can be screwed into that portion.

The outer cover 11 is for opening and closing the terminal fixing portion 12 of the block body 2, is formed in a rectangular tube shape, and is fitted on the outer periphery of the block body 2 from the lower side of the block body 2 to the upper side. It can be slid toward. An outer cover 11 is provided on the outer wall surface of the block body 2.
A lock arm 21 that engages with the outer cover 11 and locks the outer cover 11 at that position when the terminal fixing portion 12 is slid to a position where the terminal fixing portion 12 is closed is provided.

A cylindrical support shaft portion 22 is formed on one side of the connection portion cover 10. The support shaft portion 22 is press-fitted into the receiving portion 23 provided in the block body 2, and the connection portion cover 10 is attached to the block body 2. As shown in FIG. 7, the receiving portion 23 has an opening 24 formed in an obliquely upward direction, and a front dimension L1 of the opening 24.
Is smaller than the diameter L2 of the support shaft portion 22.
Therefore, as shown in FIG. 8A, the support shaft portion 22 is
It is inserted into the receiving portion 23 by being press-fitted into the opening portion 24. Further, when the support shaft portion 22 is inserted into the receiving portion 23, the connecting portion cover 10 is rotatable about the support shaft portion 22 as shown in FIG. The mounting portion 9 and the connecting portion to the battery post 3 can be covered. Further, by making the frontage dimension L1 of the opening 24 of the receiving portion 23 smaller than the diameter L2 of the supporting shaft portion 22, the supporting shaft portion 22 is accidentally detached from the inside of the receiving portion 23, and the connecting portion cover 10 is blocked. I try not to drop it from 2.

[0008]

However, in the fusible link block 1, when the support shaft portion 22 of the connection portion cover 10 is inserted into the receiving portion 23, the support shaft portion 22 is directed toward the opening 24. Since it is press-fitted and forcibly fitted, stress is applied to the root portion 23a (see FIG. 7) of the receiving portion 23, which may cause permanent deformation or break. If the receiving portion 23 is permanently deformed or broken, the connecting portion cover 10 may drop off from the block body 2.

Further, since the support shaft portion 22 is forcibly fitted into the receiving portion 23, a large insertion force is required, and there is a problem that workability when mounting the connection portion cover 10 on the block body 2 is poor. .

Therefore, according to the present invention, the attachment of the cover to the block body is easy and the workability is improved, and the receiving portion is not permanently deformed or broken and the connecting portion cover is securely attached to the block body. An object of the present invention is to provide a holding structure for a cover for a fusible link block that can be used.

[0011]

In order to achieve the above object, the invention according to claim 1 includes a fusible link mounting portion to which a fusible link is mounted, and a terminal fixing portion for bolting the fusible link terminal. A supporting structure for a fusible link block cover, which is rotatably connected to a block main body thereof and covers at least an upper portion of the fusible link mounting part, the supporting shaft part being provided at one end of the cover, and the supporting shaft. It is characterized by comprising a receiving part having an opening into which the part is inserted and supporting the support shaft part, and a closing part slidably supported by the block body and capable of closing the opening part.

In this holding structure, the cover is assembled to the block main body by inserting the support shaft portion into the receiving portion through the opening and closing the opening at the closing portion. When the support shaft portion is inserted into the opening portion, it is not necessary to forcefully fit the support shaft portion, and by closing the opening portion with the closing portion, the support shaft portion is prevented from coming off from the receiving portion.

The invention according to claim 2 is the invention according to claim 1, wherein the opening dimension of the receiving part is set to be larger than the diameter of the supporting shaft part, and the supporting shaft part is inside the receiving part. It is characterized by being inserted.

In this holding structure, the cover is assembled to the block body by inserting the support shaft portion into the receiving portion through the opening and closing the opening at the closing portion. When the support shaft portion is inserted into the opening portion, the opening dimension of the opening portion is larger than the diameter of the support shaft portion, so that the support shaft portion is not forcibly fitted.

The invention according to claim 3 is the invention according to claim 1 or 2, wherein the opening is opened downward, and the opening is closed by sliding the closing part upward. It is characterized by

In this holding structure, the opening is closed by sliding the closing portion upward while the supporting shaft portion is inserted into and supported by the receiving portion. As a result, the support shaft portion is reliably supported by the receiving portion.

The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the closing portion is provided in the block body to close the terminal fixing portion. It is characterized in that it is formed integrally with the outer cover.

In this holding structure, when the outer cover is moved and the terminal fixing portion is closed while the support shaft portion of the cover is inserted into the receiving portion, the closing portion provided on the outer cover closes the opening portion of the receiving portion. As a result, the support shaft portion is attached to the block body.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a holding structure for a fusible link block cover according to the present invention will be described below.

FIG. 1 is an exploded sectional view showing a block body 26 of a fusible link block 25 to which the present invention is applied and a connecting portion cover (hereinafter simply referred to as “cover”) 27. FIG. 2 shows the block body 26. It is sectional drawing which shows the state which assembled the cover 27. The fusible link block 25 of this embodiment is different from the fusible link block 1 shown in FIG.
Only the holding structure of is different. Therefore, the same components as those shown in FIG. 6 are designated by the same reference numerals to simplify the description.

As shown in FIG. 1, the fusible link block 25 includes a block body 26, a bus bar 8, a cover 27, and an outer cover 36. The block body 26 includes a fusible link mounting portion 9 on which the fusible link 4 is mounted, and a fusible link terminal 5
And a terminal fixing portion 12 for tightening the terminal 7 with a bolt,
The cover 27 is rotatably connected to cover the upper portion of the fusible link mounting portion 9.

A support shaft 29 is formed on one side of the cover 27. The support shaft portion 29 is formed by fixing a cylindrical shaft portion 31 between support wall portions 30 and 30 (however, one is omitted) which are integrally provided so as to project from both sides of the outer wall of the cover 27. The shaft portion 31 is inserted and supported by a receiving portion 32 formed on the block body 26, and is rotatably connected to the block body 26.

The receiving portion 32 is integrally formed on the outer periphery of the block body 26. In addition, the receiving portion 32 is formed with an opening 34 that is opened obliquely downward. The front dimension L3 of the opening 34 is set to be larger than the diameter L4 of the shaft portion 31 of the cover 27. For this reason, the shaft portion 31 has the receiving portion 3
2 can be easily inserted. The opening 34 of the receiving portion 32 can be closed by a closing portion 35.

The closing portion 35 is formed integrally with the upper end portion of the outer cover 36. As shown in FIG. 2, the closing portion 35 closes the opening 34 of the receiving portion 32 in a state of covering the terminal fixing portions 12 and 12, and forms a cylindrical hollow portion together with the receiving portion 32. Since the shaft portion 31 is rotatably accommodated in the hollow portion, the cover 27 is moved to the block body 26.
Is rotatably connected to.

Next, the cover 27 will be described with reference to FIGS.
A procedure for connecting the block to the block body 26 will be described.
As shown in FIG. 3, the cover 27 is hooked on the right side surface of the block body 26 with the cover 27 kept substantially horizontal (see FIG.
(Indicated by an arrow), the shaft body 31 is placed on the block body 26, and the shaft portion 31 is inserted into the receiving portion 32 through the opening portion 34. From this state, as shown in FIG. 4, the outer cover 36 is slid upward to cover the terminal fixing portion 12, and the closing portion 35 is brought into contact with the receiving portion 32 to close the opening portion 34. Then, as shown in FIG. 5, by engaging the lock arm 21 of the outer cover 36 with the block body 26, the state in which the opening 34 is closed by the closing portion 35 is maintained.

As described above, in the fusible link block 25 of this embodiment, the support shaft portion 29 is not forcibly fitted into the receiving portion 32, so that the base portion of the receiving portion 32 is not stressed. Does not cause permanent deformation or break. Therefore, unless the outer cover 36 is lowered, the cover 27 will not accidentally drop off from the block body 26.

Further, in the present embodiment, when the shaft portion 31 is inserted into the receiving portion 32, the front face dimension L3 of the opening 34 is set to the shaft portion 31.
Since it is larger than the diameter L4 of, it does not require a large insertion force,
The cover 27 can be easily connected to the block body 26, and workability is improved.

Further, in this embodiment, since the closing portion 35 is integrally provided on the upper end portion of the outer cover 36, even if the terminal fixing portion 12 is closed by the outer cover, if the cover 27 falls off, the cover 27 is incompletely attached. Is found,
Incomplete mounting of the cover 27 can be reliably prevented.

Further, in the present embodiment, the cover 27 is inadvertently held by the block body 26, so that the cover 27
Will not be lost.

[0030]

As described above, according to the first aspect of the invention, the cover is assembled to the block body by inserting the support shaft portion into the receiving portion through the opening and closing the opening with the closing portion. Therefore, when the support shaft portion is inserted into the opening portion, it is not forcibly fitted. Therefore, the cover can be easily attached to the block body to improve workability, and the receiving portion can be securely attached to the block body without being permanently deformed or broken.

According to the second aspect of the present invention, when the support shaft portion is inserted into the opening portion, since the frontage dimension of the opening portion is larger than the diameter of the support shaft portion, it is not forcibly fitted. , The receiving part will not be damaged.

According to the third aspect of the invention, the support shaft portion is moved from the receiving portion by sliding the closing portion upward to close the opening in a state where the supporting shaft portion is hooked and supported by the receiving portion. The cover can be securely held on the block body without coming off.

According to the invention of claim 4, when the outer cover is moved and the terminal fixing portion is closed while the support shaft portion of the cover is inserted in the receiving portion, the closing portion provided in the outer cover causes the closing portion provided in the outer portion. Since the cover is closed, the support shaft portion does not come off from the receiving portion, and the cover can be securely held on the block body.

[Brief description of the drawings]

FIG. 1 is an exploded sectional view showing a block body and a cover of a fusible link block to which the present invention is applied.

FIG. 2 is a cross-sectional view showing a state in which a cover is connected to a block body of a fusible link block to which the present invention is applied.

FIG. 3 shows a procedure for connecting the cover to the block body,
It is sectional drawing which shows the state before hooking the support shaft part of a cover on the receiving part of a block main body.

FIG. 4 shows a procedure for connecting the cover to the block body,
It is sectional drawing which shows the state which hooked the support shaft part of a cover on the receiving part of a block main body.

FIG. 5 shows a procedure for connecting the cover to the block body,
It is sectional drawing which shows the state which hooked the support shaft part of a cover on the receiving part of a block main body, and closed the opening part with the closing part.

FIG. 6 is an exploded perspective view showing a configuration of a conventional fusible link block.

FIG. 7 is a cross-sectional view showing a structure for holding a cover on a block body in a conventional fusible link block.

8A and 8B show a procedure of connecting a cover to a block body in a conventional fusible link block, FIG. 8A is a sectional view showing a state before a supporting shaft portion is fitted in a receiving portion, and FIG. It is sectional drawing which shows the state which fitted the shaft part and made the block main body hold the cover.

[Explanation of symbols]

 4 Fuse 9 Fuse mounting portion 12 Terminal fixing portion 25 Fusible link block 26 Block body 27 Cover 29 Support shaft portion 32 Receiving portion 34 Opening portion 35 Closing portion 36 Outer cover

Claims (4)

[Claims] 1. A fusible link mounting part to which a fusible link is mounted and a terminal fixing part for bolting a terminal part of the fusible link to a block body so that the fusible link is rotatably connected to at least the fusible link mounting part. A support structure for a fusible link block cover that covers the upper part of the support shaft, the support shaft part having a support shaft part provided at one end of the cover and an opening into which the support shaft part is inserted. A holding structure for a fusible link block cover, which comprises a receiving portion and a closing portion slidably supported by the block body and capable of closing the opening portion. 2. The invention according to claim 1, wherein the opening dimension of the receiving portion is set to be larger than the diameter of the supporting shaft portion, and the supporting shaft portion is inserted into the receiving portion. A holding structure for the cover for the fusible link block. 3. The invention according to claim 1 or 2, wherein the opening portion is opened downward, and the closing portion is slid upward to close the opening portion. Support structure for fusible link block cover. 4. The invention according to claim 1, wherein the closing portion is integrally formed with an outer cover that is provided in the block body and closes the terminal fixing portion. A holding structure for the cover for the fusible link block, which is characterized by being