JP3494351B2 - Heat dissipation structure of block for electrical functional parts - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat dissipating structure for a block for electric functional parts, which radiates heat generated in a storage chamber to the outside.

[0002]

2. Description of the Related Art Conventionally, a relay block 80 as shown in FIG.
Is proposed. The relay block 80 penetrates the block chamber 81 through the accommodation chamber 82, and connects the terminal 83 and the relay 84 to each other in the accommodation chamber 82. However, since the relay block 80 is space-saving, the relays 84 are integrated, and the side wall 81a and the partition wall 81b of the block main body 81 surround the inside of the accommodation chamber 82, the heat generated in the accommodation chamber 82 is transmitted to the outside. There was a drawback that it was difficult to release. Therefore, there is a possibility that the temperature inside the storage chamber 82 may increase.

Therefore, in order to radiate the heat generated in the housing chamber 82 to the outside, a terminal 85 as shown in FIG. 7 has been proposed (Japanese Patent Laid-Open No. 8-222283). This terminal 85
In this configuration, a pair of covering caulking pieces 87, 87 are erected on one end side of the substrate 86, and a heat radiating plate 88 is extended on one end of the substrate 86 on the same plane as the substrate 86. Since the heat dissipation plate 88 is located behind the covering caulking piece 87, the heat dissipation plate 88 is exposed to the outside of the housing chamber 82 after the terminal 85 is inserted into the housing chamber 82.
As a result, the heat generated at the terminal 85 can be released to the outside.

However, the provision of the heat dissipation plate 88 has a drawback that the terminal 85 becomes large in size. In addition, the heat sink 88
Is arranged behind the cover crimping piece 87, the electric wire 8
9 is easily damaged, and the installation space for the relay block 80 may be narrowed.

[0005]

SUMMARY OF THE INVENTION In consideration of the above-mentioned problems, it is an object of the present invention to provide a heat dissipation structure for a block for electric functional parts, which can surely dissipate heat generated in a storage chamber to the outside.

[0006]

In order to achieve the above object, the present invention inserts a terminal having a core wire crimping piece to the core wire of an electric wire, and inserts an electric functional component in a direction opposite to the terminal insertion direction. In a block for an electric functional component, which comprises a storage chamber and a block main body having the storage chamber, a slit-shaped ventilation hole penetrating to the storage chamber is formed in a side wall of the block main body, and an open end of the ventilation port is formed. From to closed end
The length is from the entrance of the accommodation chamber to the front end side of the core wire crimping piece.
Set the distance to reach the core through the ventilation hole
The heat dissipation structure of the block for electric functional parts is characterized in that the caulking piece is exposed and the heat generated in the accommodation chamber is released to the outside from the ventilation hole (claim 1). The heat dissipation structure of the block for electrical functional parts is characterized in that the ventilation hole is arranged in a position from the entrance of the accommodation chamber in the terminal insertion direction to face the core wire crimping piece after the terminal is attached to the block body. (Claim 2). Thereby preventing the rattling of the incoming mouth of the storage chamber, entering the rear holder to the locking of the terminal accommodating chamber of the block body
The heat dissipation structure of the block for electric functional parts inserted on the mouth side is characterized (claim 3).

[0007]

1 to 5 show an embodiment of a block for electric functional parts according to the present invention. In addition,
In the present embodiment, a relay block (corresponding to a block for electric functional parts in claims) in which a relay as an electric functional part is inserted and described will be described. However, when a fuse or the like is used in place of the relay, almost the same description will be made. It is possible.

In FIG. 1, in this heat dissipation structure, a ventilation hole 3 is formed in a side wall 2a of a block body 2 which constitutes a relay block 1, and heat generated in an accommodation chamber 4 formed in the block body 2 is ventilated. It is a structure to release from 3 to the outside.
The relay block 1 includes a block body 2, a plurality of storage chambers 4 penetrating the block body 2, a slit-shaped ventilation hole 3 provided in a side wall 2 a of the block body 2, and a ventilation hole 3.
And a pair of locking protrusions 8, 8 provided on both sides of.

As shown in FIGS. 2 and 3, the inner surface 4 of the accommodation chamber 4 is
A flexible locking lance 6 is projected at a and the locking lance 6
A temporary locking piece 6a for locking the terminal 5 is formed at the free end of the. The terminal 5 is inserted from the inlet 4b on one end side of the accommodation chamber 4, and the relay 7 is inserted from the relay insertion hole 4c on the other end side.
Is inserted in the direction opposite to the terminal insertion direction (P direction). The ventilation hole 3 is in the same direction as the terminal insertion direction (P direction) on the side wall 2a of the block body 2. When the plurality of storage chambers 4 are formed in the block body 2, the ventilation holes 3 can be provided only in the desired storage chambers 4, or the ventilation holes 3 can be formed in all the storage chambers 4. Is also possible.

As shown in FIGS. 4 and 5, the length L from the open end 3a to the closed end 3b of the ventilation hole 3 is determined by the inlet 4 of the accommodation chamber 4.
The distance from b to the location of the highest temperature among the terminals 5 inserted in the accommodation chamber 4, that is, the front end side of the core wire crimping piece 9a is set. Storage room 4 through ventilation hole 3
The inside of the block is connected to the outside of the block body 2. As a result, the heat generated at the terminal 5 inserted into the accommodation chamber 4 can be released to the outside from the ventilation hole 3. Therefore, the temperature rise in the storage chamber 4 can be suppressed lower than in the conventional case. Further, the ventilation hole 3 can be formed in the block body 2 easily and inexpensively.

As shown in FIGS. 2 and 3, the terminal 5 is of a female type, and is provided with an electric contact portion 11 at one end of the substrate 10 and an electric wire connecting portion 12 at the other end. The electric contact portion 11 is
A pair of side wall plates 13, 13 extending on both sides of the substrate 10 are bent into a C-shaped cross section, and shoulder portions 11 are engaged with the temporary locking pieces 6a.
a. The electric wire connecting portion 12 includes a pair of core wire crimping pieces 9 for crimping the core wire 14a of the electric wire 14 toward the electric contact portion 11 side.
a, 9a and the coating 1 of the electric wire 14 on the rear side of the core wire crimping piece 9a.
It has a pair of covering caulking pieces 9b and 9b for caulking 4b, respectively.

As shown in FIGS. 2 and 3, the inlet 4 of the storage chamber 4
It is also possible to insert the rear holder 20 on the b side. The rear holder 20 includes a frame-shaped holder main body 21 having a locking frame 22, an insertion hole 23 formed in the holder main body 21 for inserting the terminal 5, and a pair of locking arms 24 protruding from the holder main body. , 24 and the main locking piece 2 provided at the free end of the locking arm 24 for locking the shoulder 11a of the terminal 5.
4a and. The pair of main locking pieces 6a, 6a and the insertion hole 23 correspond to one accommodation chamber 4 as one unit.

As shown in FIGS. 4 and 5, when the rear holder 20 is inserted into the entrance 4b of the accommodation chamber 4, that is, when the locking frame 22 is engaged with the locking projection 8 of the block body 2, The locking lance 6 is provided between the pair of locking arms 24, 24.
Is located. That is, the temporary locking piece 6a temporarily locks (primarily locks) the central portion of the shoulder portion 11a of the terminal 5, and then the shoulder portion 11a.
The main locking pieces 24a are permanently locked (secondary locking) on both sides of a.
The rear holder body 21 is formed in such a size that the ventilation hole 3 is not completely closed after the rear holder 20 is inserted into the block body 2.

Further, by forming the ventilation hole 3 in the block body 2, the inlet 4b of the accommodation chamber 4 after the terminal 5 is inserted.
It is possible to prevent the vicinity from opening (the direction of the arrow in FIG. 5). Further, after the rear holder 20 is attached to the block body 2, the rear holder 20 permanently locks the terminal 5 and holds the electric wire 14, so that a part of the terminal 5 and the electric wire 14 can be prevented from protruding from the ventilation hole 3. . Furthermore, in this embodiment, the ventilation hole 3 is provided on the side wall 2a of the block body 2 on the side of the inlet 4b of the storage chamber 4.
Although the case of forming the housing has been described, the accommodation chamber 4 and the rear holder 2 are formed.
The ventilation hole 3 can be formed at an arbitrary position of the block body 2 by a shape such as 0.

In this embodiment, the ventilation hole 3 is provided in the block body 2 as one of the heat radiating means for radiating the heat generated in the housing chamber 4 to the outside. Therefore, the invention is limited to this embodiment. Not a thing.

[0016]

As described above, according to the first aspect, since the slit-shaped ventilation hole is formed in the side wall of the block main body and penetrates into the storage chamber, the inside and outside of the storage chamber are separated from each other. Connect. As a result, the heat generated at the terminal inserted in the accommodation chamber can be released to the outside from the ventilation hole. That is, it is possible to prevent the heat from staying in the storage chamber. Then, the ventilation holes can be formed easily and inexpensively.

According to the second aspect of the present invention, the ventilation hole is arranged at a position where the core wire crimping piece can be seen from the inlet of the accommodation chamber in the terminal insertion direction after the terminal is attached to the block body. As a result, the heat can be reliably released from the core wire crimping piece, which has the highest heat content in the terminal. Therefore, the temperature rise in the storage chamber can be suppressed low.

According to the third aspect, since the rear holder is inserted and attached to the inlet side of the accommodation chamber, it is possible to prevent looseness of the inlet due to the formation of the ventilation hole, and to fully lock the terminal. Thereby, the deformation of the inlet and the exposure of the terminal and the electric wire from the ventilation hole can be prevented at the same time.

[Brief description of drawings]

FIG. 1 is an overall perspective view showing an embodiment of a heat dissipation structure of a block for electric functional parts according to the present invention.

FIG. 2 shows the state before inserting the rear holder in FIG.
It is sectional drawing cut | disconnected by the A line.

FIG. 3 is a view as seen from the direction of arrow B in FIG.

FIG. 4 is a cross-sectional view showing a state in which a terminal and a rear holder are inserted and attached in FIG.

5 is a view seen from the direction of arrow C in FIG.

FIG. 6 is a perspective view showing a conventional example.

FIG. 7 is a perspective view showing another conventional example.

[Explanation of symbols]

1 relay block (block for electric functional parts) 2 block main body 2a side wall 3 ventilation hole 4 accommodation chamber 4b inlet 5 terminal 7 relay (electrical functional parts) 9a core wire crimping piece 14 electric wire 14a core wire 20 rear holder

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H01H 45/00-51/36 H01R 13/533 H01R 13/42 H01R 4/18

Claims (3)

(57) [Claims] 1. A housing chamber in which a terminal having a core wire crimping piece for a core wire of an electric wire is inserted and an electric functional component is inserted in a direction opposite to a terminal insertion direction, and a block main body including the housing chamber. In the block for electric functional parts, a slit-shaped ventilation hole penetrating to the storage chamber is formed on the side wall of the block body, and the ventilation hole is opened to closed.
Is the length from the inlet of the accommodation chamber to the front end of the core crimping piece.
Through the ventilation holes set to the distance to the side
A heat dissipation structure for an electric functional component block , wherein the core wire crimping piece is exposed and heat generated in the accommodation chamber is released to the outside from the ventilation hole. 2. The ventilation hole is arranged in a position such that the core wire crimping piece can be seen from the entrance of the accommodation chamber in the terminal insertion direction after the terminal is attached to the block body. The heat dissipation structure of the block for electric functional parts according to item 1. 3. A which prevents rattling of the incoming mouth of said housing chamber, said block present a rear holder for permanently engaging the terminal
3. The heat dissipation structure for an electric functional component block according to claim 1, wherein the heat dissipation structure is inserted and attached to an entrance side of a body accommodating chamber .