JP2003348733A - Electrical connection box for different voltage fuses - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance identification properties and safety, when fuses for low voltage and high voltage are mixed. <P>SOLUTION: Either of a low-voltage fuse 11 or a high-voltage fuse 12 is surrounded with a frame-shaped wall 6, or it is arranged in a recess to discriminate it from the other. Either plural low-voltage fuses 11 or plural high-voltage fuses 12 are surrounded severally with frame-shaped walls 6 or are arranged severally within recesses. It will do to surround either the plural low-voltage fuses or the plural high-voltage fuses in a lump with a frame-shaped wall or arrange them in a lump in a recess. The high-voltage fuse 12 may be arranged within the frame-shaped wall 6 or in the recess. A wall for prevention of leakage is projected in a direction opposite to the direction of projection of the frame-shaped wall at the section 7, which isolates at least the low-voltage fuse 11 and the high-voltage fuse 12 from each other, of the frame-shaped wall 6. <P>COPYRIGHT: (C)2004,JPO

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric junction box for mounting different-voltage fuses in which an electric junction box in which low-voltage fuses and high-voltage fuses are mixed to improve discrimination and safety. Things.

[0002]

2. Description of the Related Art FIGS. 6 and 7 show an embodiment of a conventional electric junction box for mounting a different-voltage fuse. The electric connection box 41 according to the present embodiment is mounted on an automobile. As the different voltage fuses 11 and 12, for example, those for 14V and 42V for the alternator generated voltage are mixedly arranged in the electric junction box. These correspond to battery voltages of 12 V and 36 V, respectively.

The sizes and shapes of the fuses 11 and 12 are the same, and the fuse insertion portion (insertion hole) of the electric connection box 41 is used.
The sizes of 4 and 5 are the same. The fuse insertion portions 4 and 5 are arranged in a plurality of rows (two rows in this embodiment) in parallel in the fuse thickness direction. Each of the fuses 11 and 12 has a rectangular body 13 and a pair of tab-shaped terminals 14 protruding from the body 13. Female terminal or a female relay terminal (not shown) is accommodated.

A female terminal or a female relay terminal is connected to an electric connection box 4.
1 is connected to a bus bar circuit (not shown). The bus bar circuit has input and output terminals (not shown). Each terminal is located in the connector of the electric connection box 41 and is connected to an external circuit by a connector. It is connected to each accessory (not shown). The electric connection box 41 of the present embodiment functions as a fuse box. In addition,
Different voltage fuses 11 and 12 may be attached to an electric connection box (not shown) together with a relay or the like. The electric connection box is composed of a connection box body 42 made of synthetic resin, a cover (not shown), a plurality of fuses 11 and 12, a bus bar, and the like.

[0005]

However, in the above-mentioned conventional electric connection box for mounting a different-voltage fuse, a plurality of fuse insertion portions 4, 5 of the electric connection box 41 as shown in FIG.
The operator must carefully determine where the low-voltage fuse 11 is inserted (attached by insertion) and where the high-voltage fuse 12 is inserted, and there is a risk of erroneous insertion. . In addition, an arc may be generated when the high-voltage fuse 12 is detached from the fuse insertion portion 5 or the like, and it is necessary to enhance safety and disaster prevention for general users. Further, when the different voltage fuses 11 and 12 are arranged adjacent to each other as shown in FIG. 7, the current easily leaks from the high voltage fuse 12 to the low voltage fuse 11, and there is a concern that the auxiliary equipment may malfunction. .

In view of the above, the present invention can prevent erroneous insertion of a high-voltage fuse and a low-voltage fuse, and can enhance safety and disaster prevention for general users even when high-voltage fuses are mixed. It is another object of the present invention to provide an electric junction box for mounting a different voltage fuse, which can prevent current leakage from a high voltage fuse to a low voltage fuse.

[0007]

In order to achieve the above object, an electric junction box for mounting a different voltage fuse according to the first aspect of the present invention is a mixture of a low voltage fuse and a high voltage fuse. In the electrical junction box for mounting a different voltage fuse, one of the low voltage fuse and the high voltage fuse is surrounded by a frame-shaped wall or disposed in a concave portion to be distinguished from the other. It is characterized by. With the above configuration, a general user or a maintenance worker can easily identify that the fuse in the frame-shaped wall and the fuse in the recess have a different voltage from the fuse outside the frame and the fuse outside the recess. In addition, since the frame-shaped wall is located between the high-voltage fuse and the low-voltage fuse, the creepage distance between the two fuses increases, and leakage from the high-voltage fuse to the low-voltage fuse is prevented. You. The step of the concave portion increases the creepage distance between the high-voltage fuse and the low-voltage fuse and prevents leakage.

According to a second aspect of the present invention, there is provided the electrical junction box for mounting a different voltage fuse according to the first aspect, wherein the plurality of low voltage fuses and the plurality of high voltage fuses are provided. Is characterized in that either one of them is surrounded by the frame-shaped wall portion one by one or arranged one by one in the concave portion. According to the above configuration, the fuses in the frame-shaped wall portion and the fuses in the concave portion can be more clearly identified. Further, by surrounding the fuses one by one with a frame-shaped wall or accommodating them in the recesses, the degree of freedom in the layout (layout) of the fuses is increased. The frame-shaped wall increases the creepage distance to prevent current leakage. The step of the recess also increases the creepage distance to prevent current leakage.

According to a third aspect of the present invention, there is provided the electrical junction box for mounting a different voltage fuse according to the first aspect of the present invention, wherein a plurality of the low voltage fuses and a plurality of the high voltage fuses are provided. A plurality of any of the above is collectively enclosed by the frame-shaped wall portion, or a plurality of any one of the above is collectively arranged in the concave portion. With the above configuration, particularly when a large number of fuses are used, the same type of fuse is surrounded by one frame-shaped wall portion, or the same type of fuse is accommodated in one concave portion, thereby simplifying the structure of the junction box body. Also, the work of inserting the fuse is facilitated. The stepped portion of the frame-shaped wall portion or the concave portion increases the creepage distance between the low-voltage fuse and the high-voltage fuse, and prevents current leakage between the two fuses.

According to a fourth aspect of the present invention, there is provided the electrical junction box for mounting a different voltage fuse according to any one of the first to third aspects, wherein the electrical junction box for mounting a different voltage fuse is provided inside the frame-shaped wall portion. The high-voltage fuse is arranged in the recess. According to the above configuration, the high-voltage fuse is located in the frame-shaped wall portion or the concave portion and is clearly distinguished from the low-voltage fuse. In addition, the high-voltage fuse is surrounded by the frame-shaped wall portion, or the high-voltage fuse is accommodated in the concave portion, so that the high-voltage fuse is hardly contacted with the outside. When the high-voltage fuse is placed in the frame-shaped wall, at least the portion of the high-voltage fuse near the terminal is completely guarded by the frame-shaped wall, and general users and the like can use the high-voltage fuse. It becomes more difficult to touch. In addition, since it is difficult for a general user or a maintenance worker to take out the high-voltage fuse in the concave portion, attention is drawn, and the high-voltage fuse in the concave portion is not easily touched.

According to a fifth aspect of the present invention, there is provided an electrical junction box for mounting a different voltage fuse according to any one of the first to fourth aspects, wherein: A wall portion for preventing leakage is formed at least at a portion separating the low-voltage fuse and the high-voltage fuse, in a direction opposite to a direction in which the frame-shaped wall portion protrudes. According to the above configuration, the creepage distance on the front side of the electric connection box increases in the frame-shaped wall portion, and the creepage distance on the back side of the electric connection box increases in the wall for preventing leakage, so that the current along the front and back surfaces is reduced. Leaks are prevented. The wall for preventing leakage on the back side prevents an operator from contacting the terminal portion of the high-voltage fuse inside the electric connection box during maintenance of the electric connection box or the like.

According to a sixth aspect of the present invention, in the electrical junction box for mounting a different voltage fuse according to any one of the first to fourth aspects, the step portion of the concave portion is the same as that of the first embodiment. It is characterized in that it is a wall that increases the creepage distance between the high-voltage fuse and the low-voltage fuse. According to the above configuration, the wall, which is the step portion of the concave portion, increases the creepage distance between the low-voltage fuse and the high-voltage fuse, and prevents leakage of current from the high-voltage fuse to the low-voltage fuse.

[0013]

1 and 2 show a first embodiment of an electric junction box for mounting a different voltage fuse according to the present invention.

The electric junction box 1 has a plurality of rows (two rows) of fuse insertion portions (insertion holes) 4 and 5 on the upper horizontal wall 3 of a junction box body 2 made of synthetic resin (insulating). And at the same time, a frame-shaped wall portion 6 is formed around the high voltage (42 V) fuse insertion portion 5 of the fuse insertion portions 4 and 5 of each row one by one. 3 and is distinguished from the other low voltage (14 V) fuse insertion portion 4 by projecting vertically.

The frame-shaped wall 6 is formed on the junction box main body 2 in a shape in which a pair of long sides 7 and 8 and a pair of short sides 9 and 10 are orthogonal to each other, corresponding to the horizontally long fuse insertion portion 5. It is integrally molded with resin. The projecting height of the frame-shaped wall 6 is the body 1 of the fuse 12.
2, the upper half of the body 13 protrudes upward from the frame-shaped wall 6 in a state where the fuse 12 is inserted into the fuse insertion portion 5 as shown in FIG.

As shown in FIG. 1, low-voltage fuse insertion portions 4 and high-voltage fuse insertion portions 5 are provided alternately in each row.
The second row of high-voltage fuse insertion sections 5 is adjacent to the first row of low-voltage fuse insertion sections 4, and the second row of low-voltage fuse insertion sections of the first row of high-voltage fuse insertion sections 5. The attachment portions 4 are provided adjacent to each other.

By mounting the high-voltage fuse 12 in a state surrounded by the frame-shaped wall 6, a general user, a maintenance worker, and the like can pay attention to the high-voltage fuse 12 and prevent arcing. Security and disaster prevention are improved. In the same row, the high-voltage fuse 12 and the low-voltage fuse 1
1 are alternately positioned, the frame-shaped wall portions 6 and the portions 15 without the frame-shaped wall portions 6 are alternately positioned, and the frame-shaped wall portions 6 and the frame-shaped Since the portion 15 without a wall portion is located adjacent to the high-voltage fuse 1, the positions of the plurality of high-voltage fuses 12 are clarified due to the regularity of the arrangement.
Attention to 2 and safety and disaster prevention are further enhanced. The frame-shaped wall 6 functions as a partition separating the high-voltage fuse 12 and the low-voltage fuse 11. The creepage distance L (FIG. 2) is extended by the frame-shaped wall portion 6, and current leakage from the high-voltage fuse 12 to the low-voltage fuse 11 is prevented.

As shown in FIG. 2 (a sectional view taken along the line AA in FIG. 1), the frame-shaped wall portion 6 projects vertically upward from the upper wall portion 3 of the connection box main body 2, and at least a low-voltage fuse is inserted. Long sides (one wall) 7, 8 on the side facing the attachment portion 4 are vertically projected downward. The wall projecting downward is indicated by reference numeral 16. In this example, the short side (other wall) 9 of the frame-shaped wall 6 is also provided between the first-row high-voltage fuse insertion part 5 and the second-row low-voltage fuse insertion part 4 (FIG. It is preferable that 1) be extended downward as in FIG. The wall portion may be extended in a rectangular frame shape below the horizontal wall portion 3 like the upper frame-shaped wall portion 6. The upper and lower vertical walls 7, 16 are arranged vertically symmetrically, and have the same shape, height, and the like. The upper and lower walls 7 and 16 are formed of resin integrally with the connection box body 2.

Since the vertical walls 7 and 16 are projected above and below the opening of the fuse insertion portion 5, the upper surface 3 of the horizontal wall 3 is formed.
The leakage along the lower surface 3b of the wall 3 as well as the leakage along the line a is prevented, and the leakage of current from the high-voltage fuse 12 to the low-voltage fuse 11 is reliably prevented.

When the fuses 11 and 12 are inserted as shown in FIG.
It is preferable from the viewpoint of preventing leakage and sparking that the tip (lower end) of the lower vertical wall portion 16 projects downward or at least has the same height. Each fuse 1
Male terminals of, for example, a bus bar (not shown) in the connection box body 2 are female relay terminals (not shown) at the terminals 14 of the first and second terminals.
Connected via These connection structures are the same as the conventional one.

It is also possible to arrange the different voltage fuse insertion portions 4 and 5 in the connection box main body 2 in one row or three or more rows. In the case of three rows, it is preferable that the other two rows of the portions 15 without the frame-shaped wall are arranged on both sides of the frame-shaped wall 6 in the center row. It is also possible to arrange the frame-like wall portions 6 at random in each row instead of regularly. Further, it is also possible to insert the low-voltage fuse 11 instead of the high-voltage fuse 12 into the fuse insertion portion 5 in the frame-shaped wall portion 6 (such that the terminal portion on the bus bar side is changed and arranged). It is possible. Also in this case, the frame-shaped wall portion 6, particularly the vertical vertical wall portions 7 and 16, extends the creepage distance from the high-voltage fuse 12 to the low-voltage fuse 11, thereby reliably preventing leakage. However, it is best to dispose the high-voltage fuse 12 in the frame-shaped wall portion 6 in order to call a general user or an operator's attention.

Also, unlike FIG. 2, the fuselage 13 of each of the fuses 11, 12 may be inserted deeply into each of the fuse insertion portions 4, 5. In this case, the terminals 14 of the fuses 11 and 12 protrude downward from the lower vertical wall portion 16, but there is no variation in the creepage distance, and air acts as an insulating layer between the terminals 14. Absent. In this case, the lower wall portion 16 for increasing the creepage distance may protrude longer than the upper wall portion 7. In addition, it is also possible to use an electric wire instead of the bus bar as a circuit in the connection box main body 2. These also apply to other embodiments described later.

FIG. 3 shows a second embodiment of the electric junction box for mounting a different voltage fuse according to the present invention. The same components as those in FIG. 1 are denoted by the same reference numerals, and detailed description will be omitted.

The electric connection box 21 is a connection box body 22 made of a synthetic resin and provided with a plurality of fuse insertion portions (insertion holes) 4 and 5 in a plurality of rows and in parallel. The voltage (42V) fuse insertion part 5 is separated from the plurality of low voltage (14V) fuse insertion parts 4 and arranged collectively at one place, and the plurality of high voltage fuse insertion parts 5 are combined into one large It is characterized by being surrounded by a rectangular frame-shaped wall portion 26 and distinguished from the low-voltage fuse insertion portion 4.

In this example, the fuse insertion portions 4 and 5 are arranged in two rows at equal intervals, and the high voltage fuse insertion portions 5 are collectively arranged in the front half of the junction box body 22 and in the rear half. The low-voltage fuse insertion portions 4 are arranged as a group. The size and shape of each of the fuse insertion portions 4 and 5 are the same.

The first side 27 of the frame-shaped wall 26 at the center of the junction box body 22 separates the high-voltage fuse mounting portion 5 and the low-voltage fuse mounting portion 4, and the first side 27 Are parallel second and second sides along a plurality of high-voltage fuse insertion portions 5 in each row.
The two sides 29, 30 are orthogonal to the third sides 29, 30, and are orthogonal to the fourth side 28 parallel to the first side 27 on the front end side of the connection box main body 22.

A'-A 'of the first side (one wall) 27
The cross section is symmetrically extended below the horizontal wall portion 23 of the connection box body 22 in the same manner as FIG. The creepage distance with the fuse 11 is extended, so that the leakage of current from the high-voltage fuse 12 to the low-voltage fuse 11 is reliably prevented. The other three sides (walls) are 28-30
It is not necessary to extend it to the lower side, but it is possible to extend it daringly to further increase the reliability of leak prevention.

By arranging the high-voltage fuses 12 collectively inside the large frame-shaped wall portion 26, the identification of the fuses 12 by the general user and the worker is further facilitated and assured, and the insertion of the fuses 12 is performed. Work is also easier. Since there is no potential difference between the high-voltage fuses 12 in one frame-shaped wall portion 26, there is no fear of leakage.

When there are a large number of fuse insertion portions 4 and 5, a frame-shaped wall 26 surrounding the plurality of high-voltage fuse insertion portions 5 is formed on the upper wall 23 of the connection box body 22, for example. It may be installed at a location.

FIGS. 4 and 5 show a third embodiment of the electric junction box for mounting a different voltage fuse according to the present invention. The same components as those in FIG. 3 are denoted by the same reference numerals, and detailed description is omitted.

The electric connection box 31 is a connection box main body 32 made of synthetic resin and provided with a plurality of fuse insertion portions (insertion holes) 4 and 5 in a plurality of rows and in parallel. The voltage (42V) fuse insertion portion 5 is separated from the plurality of low voltage (14V) fuse insertion portions 4 and arranged collectively at one place, instead of the frame-shaped wall portion 26 of the embodiment of FIG. Thus, a plurality of high-voltage fuse insertion portions 5 are arranged in one large rectangular concave portion 36 to be distinguished from the low-voltage fuse insertion portion 4.

The recess 36 is formed integrally with the upper horizontal wall 23 in the first half of the connection box main body 32, and the wall 33 is lowered horizontally by one step in the recess 36 and is positioned horizontally. A step portion (step wall) 37 is formed between them. The concave portion 36 includes a horizontal wall portion 33 and vertical front and rear, left and right wall portions 37 to 40 orthogonal to the horizontal wall portion 33.

By arranging each high-voltage fuse 12 in the concave portion 36, the high-voltage fuse 12 is identified, and it is difficult for a general user or an operator to take out the high-voltage fuse 12 (it is difficult to remove). Thus, by inviting caution when replacing a fuse, etc., safety and disaster prevention properties such as arc prevention are improved.

As shown in FIG. 5 (a cross-sectional view taken along the line BB in FIG. 4), a vertical wall 37, which is a step connecting the upper wall 23 and the lower wall 33, has a high-voltage fuse inserted therein. Since the creepage distance between the section 5 and the low-voltage fuse insertion section 4 is increased, leakage from the high-voltage fuse 12 to the low-voltage fuse 11 is prevented.

As a fourth embodiment of the electric junction box for mounting a different voltage fuse according to the present invention, a high voltage fuse insertion portion 5 is used instead of the frame-shaped wall portion 6 of the embodiment of FIG. It is also possible to provide one by one in the recess of the connection box body.
In this case, the concave portions (not shown) may be provided alternately,
It may be provided continuously and in parallel. The upper surface of the upper wall portion 23 is located in a frame shape between the adjacent concave portions. The concave portion makes it difficult to take out the high-voltage fuse, which enhances the safety and disaster prevention properties.
The creepage distance between the fuse and the high-voltage fuse 12 is increased, and leakage is prevented.

When there are a large number of fuse insertion portions 4 and 5, a plurality of recesses 36 for accommodating a plurality of high-voltage fuse insertion portions 5 are provided at, for example, a plurality of locations on the upper wall 23 of the connection box body 32. May be. Further, depending on the location of the electric connection box 31, for example, when the fuse in the concave portion 36 is easy to see from the outside, and the upper wall portion 23 without the concave portion 36 is blocked by a shielding plate or the like (not shown) and is difficult to see from outside. Is
The low-voltage fuse 11 is arranged in the recess 36,
It is also possible to dispose the high-voltage fuse 12 in a portion where no fuse is provided. In addition, the frame-shaped wall portions 6 and 26 and the concave portion in FIG. 1 and FIG.
36 can be formed in the connection box body by appropriately combining them.

[0037]

As described above, according to the first aspect of the present invention, a general user or a maintenance worker can easily distinguish a fuse in a frame-shaped wall or a fuse in a concave portion from other fuses. Since the erroneous insertion of the voltage fuse is prevented, the product quality of the electric connection box and the reliability of the electric connection are improved. In addition, the stepped portion of the frame-shaped wall or concave portion increases the creepage distance between the high-voltage fuse and the adjacent low-voltage fuse, thereby preventing current leakage from the high-voltage fuse to the low-voltage fuse. Therefore, malfunction of the auxiliary equipment of the vehicle is prevented.

According to the second aspect of the present invention, the fuse in the frame-shaped wall portion and the fuse in the concave portion are more clearly identified, so that erroneous insertion of a different-voltage fuse is more reliably prevented. Also, enclose the fuses one by one in a frame-shaped wall,
By accommodating the fuses in the recesses, the degree of freedom in the layout (layout) of the fuses is increased, and it is possible to easily and inexpensively cope with the design of electric junction boxes of various specifications.

According to the third aspect of the present invention, a plurality of fuses of the same type are accommodated in one frame-shaped wall or one recess, so that the structure of the junction box body is simplified, and The manufacturing cost is reduced, the work of inserting the fuse is facilitated, and the productivity of the electric junction box is increased.

According to the fourth aspect of the present invention, the high-voltage fuse is located in the frame-shaped wall portion or the concave portion, is clearly distinguished from the low-voltage fuse, and is placed in a state where it is hard to contact the outside. Therefore, attention can be given to general users and maintenance workers, electric shocks due to arcs are prevented, and safety and disaster prevention are improved.

According to the fifth aspect of the invention, leakage of current along the front and back surfaces of the electric junction box is prevented, so that leakage from the high-voltage fuse to the low-voltage fuse is more reliably prevented, and the auxiliary voltage is reduced. Worries such as malfunctions of the machine are reliably eliminated. Further, since the wall for preventing leakage prevents the contact of the high-voltage fuse in the electrical junction box with the terminal during maintenance or the like, the maintainability and the safety and disaster prevention are further improved.

According to the sixth aspect of the present invention, the wall, which is the step portion of the concave portion, increases the creepage distance between the low-voltage fuse and the high-voltage fuse, and changes from the high-voltage fuse to the low-voltage fuse. Since the current leakage is prevented, malfunction of the auxiliary equipment and the like are prevented, and the quality of the electric junction box is improved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of an electric junction box for mounting a different voltage fuse according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an exploded perspective view showing a second embodiment of the electric junction box for mounting a different voltage fuse according to the present invention.

FIG. 4 is an exploded perspective view showing a third embodiment of the electric junction box for mounting a different-voltage fuse according to the present invention.

FIG. 5 is a sectional view taken along line BB of FIG. 4;

FIG. 6 is an exploded perspective view showing one form of a conventional electric junction box for mounting a different voltage fuse.

FIG. 7 is a sectional view taken along the line CC of FIG. 6;

[Explanation of symbols]

1,21,31 Electrical connection box 2,22,32 Connection box body 6,26 Frame-shaped wall 7,27 side or wall (separating part) 11 Low voltage fuse 12 High voltage fuse 16 Leak prevention wall 36 recess 37 Step (wall)

Claims (6)

[Claims] 1. An electric junction box for mounting a different voltage fuse in which a low voltage fuse and a high voltage fuse are mixed, wherein one of the low voltage fuse and the high voltage fuse is a frame-shaped wall. An electrical junction box for mounting a different voltage fuse, wherein the electrical junction box is surrounded by a portion or arranged in a concave portion to be distinguished from the other. 2. The method according to claim 1, wherein one of the plurality of low-voltage fuses and the plurality of high-voltage fuses is individually surrounded by the frame-shaped wall, or arranged one by one in the recess. The electrical junction box for mounting a different voltage fuse according to claim 1. 3. The method according to claim 2, wherein one of the plurality of low-voltage fuses and the plurality of high-voltage fuses is collectively surrounded by the frame-shaped wall, or the plurality of low-voltage fuses is collectively disposed in the recess. The electrical junction box for mounting a different voltage fuse according to claim 1. 4. The high-voltage fuse is arranged in the frame-shaped wall portion or the recessed portion.
The electrical junction box for mounting a different voltage fuse according to any one of claims 1 to 3. 5. A wall for preventing leakage in a direction opposite to a projecting direction of the frame-shaped wall at least at a portion of the frame-shaped wall separating the low-voltage fuse and the high-voltage fuse. The electrical junction box for mounting a different voltage fuse according to any one of claims 1 to 4, wherein the electrical junction box is formed so as to protrude. 6. The step according to claim 1, wherein the step of the recess is a wall for increasing a creepage distance between the high-voltage fuse and the low-voltage fuse. Electrical junction box for mounting different voltage fuses.