JPH11329561A - Heat-radiating structure using connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a heat-radiating structure in association with a connector which is two-piece type and used frequently for electrical connection to a heat generating unit, and enable the increase in heat-radiating area or heat-radiating volume even in a narrow space. SOLUTION: A terminal portion 14 of a first piece 1 to screw a heat sink 3 is engaged with a slit portion 22 of a second piece (shown by an arrow AR). A terminal 14a is electrically connected to a terminal of the second piece side. In such a state, heat is generated in a CPU 201 provided on a first printed board 203 and other electric unit 202 and a part of the heat flows in a housing of the electric unit 2 and radiated. However, a large quantity of remaining heat is passed through a guide projecting portion 21 from an extending portion 205, transmitted to the heat sink 3, and radiated in air. Simultaneously, the heat flows to a housing of the first piece 1 made of materials having low-heat resistance, and is radiated. It is possible to assure a wide heat-radiating area because heat generated in a heating element is radiated from all of the housing of the electric unit, heat sink 3, and first piece 1.

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 in an electric device in which a heat generating unit is incorporated, and more particularly, to a heat dissipating structure using a connector to enhance a heat dissipating function.

[0002]

2. Description of the Related Art For example, various control devices such as an NC control device of a machine tool incorporate an electronic unit (an electronic component or an assembly thereof) having a property of generating high heat during operation, such as a microprocessor. Such heat generation causes a rise in the temperature inside the device, which causes malfunction of the circuit and an accident. Conventionally, a heat sink is provided in a heat-producing unit to dissipate heat, while a separately prepared metal fitting or the like is used for fixing a connector used for electrical connection to the heat-producing unit.

[0003]

However, such a conventional heat radiating structure often lacks a heat radiating function, and there has been a demand for an improvement for exhibiting the maximum heat radiating performance in a narrow space. In addition, increasing the size of the heat sink in order to enhance heat dissipation is not advantageous in terms of equipment compactness and economy.

Accordingly, an object of the present invention is to improve a heat dissipation structure in connection with a two-piece connector frequently used for electrical connection to a heat-generating unit so that the heat dissipation area or heat dissipation can be improved even in a narrow space. The purpose is to increase the volume.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a heat-generating unit is fixed to one piece of a two-piece connector used for electrical connection to a heat-generating unit incorporated in an electric device. The above problem has been solved by using a piece to which the heat generating unit is fixed as a radiator.

In the present invention, one piece of a two-piece connector frequently used for electrical connection of an electronic unit can be used as a fixing means and a heat radiating means for an electronic unit including a heating element. In addition, a heat radiation area or a heat radiation volume can be ensured even in a narrow space, and heat generated in the heat generating unit can be efficiently released.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a partially broken-out exploded view schematically showing a heat radiation structure according to an embodiment of the present invention. In the figure, reference numeral 1 denotes a first part of a two-piece connector.
It represents a piece. Reference numeral 2 denotes an electronic unit including a heating element, which is electrically connected through a second piece 22 of a two-piece connector. The first piece 1 is a piece on the current supply side, and is made of a material having low thermal resistance. As a material having a low heat resistance, for example, a metal containing aluminum as a main component is suitable, but other low heat resistance materials may be used.

In the present embodiment, the housing of the first piece 1 has a base portion 11, extending portions 12 and 13, and has a U-shape as a whole. Then, the extending portions 12 and 13
In the right place, fin-like irregularities are formed to promote heat radiation. A part of the inside of the base portion 11 is opened, and the terminal portion 14 having a large number of terminals 14a protrudes and is exposed.

Reference numeral 3 denotes a heat sink mounted on the housing of the first piece 1, which is made of a material having a low thermal resistance, for example, a metal mainly containing aluminum, like the housing. Radiation fins 32 and 33 are formed at appropriate places on the upper surface 31 of the heat sink. Next, the electronic unit 2
Includes, in addition to the housing, a printed board on which various electronic components are mounted, and a second piece 22 for electrically connecting the electronic unit.

Many of the electronic components mounted are exothermic. The housing of the second piece 22 has a shape and dimensions that match the U-shaped recess of the first piece 1 as a whole,
A slit portion having a guide protrusion 21 is formed at a leading edge portion drawn to face the first piece 1.

The slit portion has a shape and dimensions for receiving the terminal portion 14 of the first piece 1, while a connector contact terminal (not shown) electrically connected to a printed circuit board 203 described later is provided at the back portion. Designed to be located.

Therefore, as shown by the arrow AR, by pushing the projection 21 of the second piece 22 so as to be aligned with the upper surface of the terminal 14, the terminal 14 fits into the terminal of the second piece, and Electrical connection between the terminal 14a and the terminal of the printed circuit board 203 is secured.

As shown partially broken, a first printed circuit board 203 and a second printed circuit board 206 are mounted inside the electronic unit 2. Both are in a parallel relationship, and on the first printed circuit board 203 located inside,
A CPU (microprocessor unit) 201 and other circuit components 202 constituting a heating element are mounted.

The upper surface of the CPU 201 is in contact with the lower surface of the overhang portion 205 of the electronic unit 2 via a film 204 of a heat conductive material made of silicon resin or the like.
The second blind grave plate 206 is fixed to the upper surface of the electronic unit 2 with screws 207. The print closing plate 206 has a connector 208 for external connection on one side thereof. The printed board 206 and the printed grave plate 203 are electrically connected to each other via a connector (not shown) provided on the surface facing each other.

At the proper position of the heat sink 3, the first piece 1 of the connector, and the electronic unit 2, mounting / fixing screws S1
, H7, and H8 are provided. Attachment / fixation of the heat sink 3 to the first piece 1 is performed by screw holes H1, K1, H3, K provided with screws S1, S3, S5, S7, S8 at corresponding positions.
3... H8, K8, and screwed.

Further, after the second piece is connected to the first piece 1 (arrow AR), the screws are passed through screws S2, S4, S6 and corresponding screw holes H2, L2, H4, L4, H6, L6.
By screwing, the heat sink 3 is also fixed to the electronic unit 2. Eventually, the heat sink 3, the first piece 1, the electronic unit 2
It becomes a form that the three are united.

The heat flow in the heat dissipation structure of the two-piece connector is as follows. CPU 20
The heat generated in the electronic unit centering on 1 flows first to the overhanging portion 205 and the projection 21, flows to the entire housing of the electronic unit 2, and is radiated from the surface thereof. The entire housing portion of the electronic unit 2 having the overhang portion 205 and the protrusion portion 21 is made of a material having low thermal resistance.

Most of the remaining heat is transmitted from the overhang portion 205 to the heat sink 3 through the guide protrusion 21. Most of the heat transmitted to the heat sink 3 is radiated to the air, while part of the heat is transmitted to the first bead 1 from the heat sink 3 and radiated to the air from the first piece 1. in this way,
Since the heat generated by the heating element is radiated from any of the electronic unit 2, the heat sink 3, and the first piece 1, a large heat radiation area is secured.

[0019]

According to the heat radiation structure according to the present invention, heat is efficiently transferred from the heat generating unit to one housing of the two-piece connector, so that the heat radiation performance can be improved even in a narrow space. Can be done. In addition, by reducing the necessity of increasing the size of the heat sink in order to enhance heat dissipation, it is possible to contribute to miniaturization of the size of an electric device equipped with a heat-generating unit and improvement in economy.

[Brief description of the drawings]

FIG. 1 is an exploded view of a partly broken element schematically showing a heat dissipation structure according to an embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 First piece of connector (housing part is low heat resistance material) 2 Electronic unit (housing part is low heat resistance material) 3 Heat sink 11 Base part of first piece housing 12, 13 Extension part of first piece housing 12a, 13a , 32, 33 radiating fins 14 terminal portion 14a terminal 21 zing protrusion of electronic unit 2 22 second piece of connector 31 upper surface of heat sink 201 CPU 202 other circuit components 203 first printed circuit board 204 film of heat conductive material 205 electronic unit No. 2 overhanging portion 206 Second printed circuit board 207, S1 to S8 Mounting / fixing screw 208 Connector for external connection K1, K3, K7, K8, L2, L3, H1 to H4, H
6 to H8 screw hole

Claims (3)

[Claims] 1. A housing for at least one piece of a connector used for electrical connection to a heat-generating unit, comprising a housing having a low thermal resistance material, wherein the housing for the piece comprising the low thermal resistance material is provided. A heat dissipating structure using a connector in which a heat generating element including a heat generating unit is thermally conductive and fixed. 2. The heat dissipation structure using the connector according to claim 1, wherein the housings of both pieces of the connector are made of a low heat resistance material. 3. The heat dissipation structure using the connector according to claim 1, wherein the low thermal resistance material is a material mainly containing aluminum.