JP2000003654A - Heat dissipation structure of block for electric functional component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat dissipation structure of a block capable of surely dissipating the heat generated in storing rooms outward. SOLUTION: This electric functional component block 1 is composed of storing rooms 4 into which terminals 5 having a core wire caulking piece for a core wire of an electric wire 14 are inserted and electric functional components 7 are inserted in the direction opposite to the terminal inserting direction (P-direction), and a block body 2 provided with the storing rooms 4. Here, slit-type ventilating holes 3 perforated into the storing rooms 4 are formed in side walls 2a of the block body 2, to dissipate the heat generated in the storing rooms 4 outward through the ventilating holes 3. The ventilating holes 3 are arranged in the positions where they face the core wire caulking pieces in the terminal inserting direction, after the terminals 5 are inserted into the block body 2 through inlets of the storing rooms 4. Rear holders are fitted on the inlet side of the storing rooms 4 in order to prevent rattling of the inlets and lock the terminals 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat radiating structure of a block for an electric functional component which radiates heat generated in a housing room to the outside.

[0002]

2. Description of the Related Art Conventionally, a relay block 80 as shown in FIG.
Has been proposed. The relay block 80 penetrates a housing 82 through a block body 81 and connects a terminal 83 and a relay 84 to each other in the housing 82. However, since the relay block 80 is reduced in space, the relays 84 are integrated, and the side walls 81a and the partition walls 81b of the block main body 81 surround the inside of the housing chamber 82, heat generated in the housing chamber 82 is directed to the outside. There were drawbacks that were difficult to release. For this reason, there is a fear that the temperature inside the storage chamber 82 may increase.

Therefore, a terminal 85 as shown in FIG. 7 has been proposed to release the heat generated in the housing chamber 82 to the outside (Japanese Patent Laid-Open No. Hei 8-222283). This terminal 85
In the figure, a pair of cover caulking pieces 87, 87 are erected on one end side of a 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 radiating plate 88 is located behind the cover caulking piece 87, the heat radiating plate 88 is exposed outside the housing chamber 82 after the terminal 85 is inserted into the housing chamber 82.
Thus, heat generated at the terminal 85 can be released to the outside.

However, the provision of the heat radiating plate 88 has a disadvantage that the size of the terminal 85 is increased. Also, the heat sink 88
Is arranged behind the covering caulking piece 87, the electric wire 8
9 was easily damaged, and the installation space of the relay block 80 was likely to be narrowed.

[0005]

SUMMARY OF THE INVENTION In view of the foregoing, it is an object of the present invention to provide a heat radiating structure for an electric functional component block capable of reliably releasing heat generated in a storage chamber to the outside.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is to insert a terminal having a core crimping piece to a core of an electric wire and insert an electric functional component in a direction opposite to a terminal insertion direction. In a block for an electric functional component comprising a storage chamber to be formed and a block main body having the storage chamber, a slit-shaped ventilation hole penetrating into the storage chamber is formed in a side wall of the block main body to generate the air in the storage chamber. The heat radiation structure of the block for electric functional parts which discharges the generated heat to the outside from the ventilation hole is characterized in (claim 1). The heat dissipation structure of the block for electric functional parts, wherein the ventilation hole is arranged at a place where the core wire caulking piece can be seen after the terminal is inserted into the block main body from the entrance of the accommodation chamber in the terminal insertion direction. (Claim 2). The heat dissipation structure of the block for electric function parts, in which the backlash of the entrance is prevented on the entrance side of the accommodation chamber and the rear holder for fully locking the terminal is inserted, is provided.

[0007]

1 to 5 show an embodiment of an electric functional component block according to the present invention. In addition,
In the present embodiment, a relay block (corresponding to a block for an electric functional component in the claims) in which a relay as an electric functional component is inserted will be described. However, a case where a fuse or the like is used instead of a relay is almost the same. Available.

In FIG. 1, the heat radiation structure has a ventilation hole 3 formed in a side wall 2a of a block main body 2 constituting a relay block 1 so that heat generated in an accommodation room 4 formed in the block main body 2 is ventilated. 3 is a structure for discharging to the outside.
The relay block 1 includes a block body 2, a plurality of storage chambers 4 penetrating through the inside of 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 projections 8 provided on both sides of the projection.

As shown in FIG. 2 and FIG.
a, a flexible locking lance 6 protrudes from the locking lance 6.
A temporary locking piece 6a for locking the terminal 5 is formed at a free end of the terminal. The terminal 5 is inserted from the entrance 4b at one end of the storage chamber 4, and the relay 7 is inserted through the relay insertion hole 4c at the other end.
Are 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 2 a of the block body 2. When a plurality of accommodation rooms 4 are formed in the block main body 2, the ventilation holes 3 can be provided only in desired accommodation rooms 4, or the ventilation holes 3 can be formed in all the accommodation rooms 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 length of the entrance 4 of the accommodation chamber 4.
The distance from “a” to the location where the temperature is the highest among the terminals 5 inserted into the accommodation chamber 4, that is, the distance from the terminal 5 to the front end side of the core wire caulking piece 9 a is set. Accommodation room 4 through ventilation hole 3
And the outside of the block body 2 are connected. Thereby, the heat generated in the terminal 5 inserted in the accommodation room 4 can be released to the outside from the ventilation hole 3. Therefore, the temperature rise in the accommodation room 4 can be suppressed lower than before. Further, the ventilation holes 3 can be formed in the block main body 2 simply and at low cost.

As shown in FIGS. 2 and 3, the terminal 5 is of a female type, and has an electric contact portion 11 at one end of a substrate 10 and a wire connection portion 12 at the other end. The electrical contact portion 11
A pair of side walls 13, 13 extending on both sides of the substrate 10 are bent into a C-shaped cross section, and the shoulder 11 is engaged with the temporary locking piece 6 a.
a. The electric wire connection portion 12 includes a pair of core wire crimping pieces 9 for caulking the core wire 14 a of the electric wire 14 on the side of the electric contact portion 11.
a, 9a and the covering 1 of the electric wire 14 behind the core wire caulking piece 9a.
4b, each of which has a pair of cover crimping pieces 9b, 9b for crimping 4b.

As shown in FIG. 2 and FIG.
It is also possible to insert the rear holder 20 on the side a. The rear holder 20 includes a frame-shaped holder body 21 having a locking frame 22, an insertion hole 23 formed in the holder body 21 for inserting the terminal 5, and a pair of locking arms 24 projecting from the holder body. , 24 and the final locking piece 2 provided at the free end of the locking arm 24 for locking the shoulder 11a of the terminal 5.
4a. The pair of final locking pieces 6a, 6a and the insertion hole 23 correspond to one storage 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 storage chamber 4, that is, when the locking frame 22 is engaged with the locking projection 8 of the block body 2, A 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 center of the shoulder 11a of the terminal 5, and then the shoulder 11a.
The main locking pieces 24a are fully locked (secondary locking) on both sides of the “a”.
The rear holder main 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 main body 2.

Further, by forming the ventilation hole 3 in the block main body 2, the entrance 4b of the accommodation chamber 4 after the terminal 5 is inserted.
Opening of the vicinity (in the direction of the arrow in FIG. 5) can be prevented. Further, after the rear holder 20 is inserted into the block body 2, the rear holder 20 fully 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. . Further, in the present embodiment, the ventilation holes 3 are formed in the side walls 2a of the block main body 2 at the entrance 4b side of the accommodation room 4.
Was described, but the accommodation chamber 4 and the rear holder 2 were formed.
The ventilation hole 3 can be formed at an arbitrary position of the block main body 2 by a shape such as 0.

In this embodiment, the ventilation hole 3 is provided in the block main body 2 as one of the heat radiating means for releasing the heat generated in the accommodation room 4 to the outside, so that the present invention is limited to this embodiment. Not something.

[0016]

As described above, according to the first aspect, since the slit-shaped ventilation hole is formed in the side wall of the block body and penetrated into the accommodation room, the inside and outside of the accommodation room are separated. Connect. Thus, heat generated at the terminal inserted into the accommodation room can be released to the outside from the ventilation hole. That is, it is possible to prevent the accumulation of heat in the accommodation room. Further, the formation of the ventilation holes can be performed simply and inexpensively.

According to the second aspect of the present invention, the location of the ventilation hole is such that the core wire clamping piece can be seen from the entrance of the accommodation chamber in the terminal insertion direction after the terminal is inserted into the block body. Thereby, heat can be reliably released from the core wire caulking piece that has the most heat among the terminals. Therefore, the temperature rise in the accommodation room can be suppressed low.

According to the third aspect of the present invention, since the rear holder is inserted into the entrance side of the storage chamber, it is possible to prevent backlash at the entrance 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 terminals and the electric wires from the ventilation holes can be prevented at the same time.

[Brief description of the drawings]

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

FIG. 2 shows a 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. 2;

FIG. 4 is a sectional view showing a state where a terminal and a rear holder are inserted in FIG. 2;

FIG. 5 is a view as viewed from the direction of arrow C in FIG. 4;

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

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

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Relay block (block for electric functional parts) 2 Block main body 2a Side wall 3 Ventilation hole 4 Storage room 4b Inlet 5 Terminal 7 Relay (electric functional parts) 9a Core crimping piece 14 Electric wire 14a Core wire 20 Rear holder

Claims (3)

[Claims] 1. A housing for inserting a terminal having a core crimping piece into a core of an electric wire and inserting an electric functional component in a direction opposite to a terminal insertion direction, and a block main body having the housing. In the electric functional component block, a slit-shaped ventilation hole penetrating into the accommodation room is formed in a side wall of the block main body, and heat generated in the accommodation room is released to the outside from the ventilation hole. Heat dissipation structure of block for electrical functional parts. 2. The device according to claim 1, wherein the ventilation hole is arranged at a position where the core wire crimping piece can be seen from the entrance of the housing chamber in the terminal insertion direction after the terminal is inserted into the block main body. Item 4. A heat dissipation structure for an electric functional component block according to Item 1. 3. The block for an electric functional component according to claim 1, wherein a back holder for preventing the backlash of the entrance and fully locking the terminal is inserted into an entrance side of the accommodation chamber. Heat dissipation structure.