CN2491884Y

CN2491884Y - Radiator preventing electromagnetic interference

Info

Publication number: CN2491884Y
Application number: CN 01227721
Authority: CN
Inventors: 杨俊英
Original assignee: Mitac International Corp
Current assignee: Mitac International Corp
Priority date: 2001-06-21
Filing date: 2001-06-21
Publication date: 2002-05-15
Anticipated expiration: 2011-06-21

Abstract

A radiator device resistant to electromagnetic wave interference is connected with a grounding end of a circuit board by use of fixed components of radiators of chips such as a center processing unit and the like, thereby transmitting the electromagnetic wave interference produced by the chips through an antenna effect to the grounding end of the machine shell and resolving the problem of the electromagnetic wave interference produced by the chips such as the center processing unit and the like.

Description

The heat sink arrangement that anti electromagnetic wave disturbs

The heat sink arrangement of relevant various high-frequency chips of a kind of application what of the utility model such as CPU (central processing unit) chips such as (CPU), particularly relevant a kind of heat sink arrangement that solves the Electromagnetic Interference problem.

In present computer system, central processing unit (Central Processing Unit) computing frequency (CPU) is more and more higher, for example the central processing unit of 1GHZ computing frequency has developed out for a long time at present, because handle current signal apace, make that the heat of consumed power and generation is also increasing.Can not fully disperse as crossing these heats, certainly will influence the function of microprocessor, shorten its serviceable life, therefore, heat dissipation problem is more and more serious along with the raising of central processing unit computing frequency.

A kind of method that solves heat dissipation problem is to add some heat dissipation elements (as heating radiator) on central processing unit, conducts or the dissipation heat.On the other hand, the external electromagnetic interference (Electromagnetic interference) of the central processing unit of high-speed computation (EMI) also strengthens, so the radiation shield of itself also is very important problem.

At present relevant computer system solves the mode of electromagnetic interference, exhausted most mode that all adopts the outside to contain promptly is on the computer casing of ccontaining computer system, adopts the design of various sealings, that is to say the seam of sealing computer chassis, electromagnetic radiation can't be leaked; Yet other electric equipments of computer system inside also can be subjected to the electromagnetic interference of central processing unit at present.

By above-mentioned condition as can be known, central processing unit and radiating piece need good matching relationship and come efficiently radiates heat not influence the syntagmatic of CPU (central processing unit) and circuit board again, and have the occupying volume of the minimizing external space, avoid damaging CPU (central processing unit), simplify assembling and reduce demands such as number of spare parts and convenient for maintaining replacement.The method that what is prevented electromagnetic interference also must be considered simultaneously.

The purpose of this utility model is the heat sink arrangement that provides a kind of anti electromagnetic wave to disturb for addressing the above problem, so that can solve the problem of high-frequency chip Electromagnetic Interference.

For achieving the above object, the heat sink arrangement that anti electromagnetic wave of the present utility model disturbs is characterized in that include at least: a circuit board possesses at least an earth terminal is arranged; One heating radiator; And the retaining element of a conduction, its fixing described circuit board of described heating radiator what, and join with the earth terminal of described circuit board.

Adopt such scheme, utilize the retaining element of heating radiator to become to be electrical connected, and the electromagnetic waveguide that chip is produced by antenna effect passes to the problem that the chassics earth end solves Electromagnetic Interference with the earth terminal of circuit board.

Understand the purpose of this utility model, characteristics and advantage for clearer, preferred embodiment of the present utility model is elaborated below in conjunction with accompanying drawing.

Fig. 1 is the synoptic diagram of the utility model one preferred embodiment;

Fig. 2 is the synoptic diagram of the utility model retaining element;

Fig. 3 is the synoptic diagram of another preferred embodiment of the present utility model; And

Fig. 4 is the synoptic diagram of the another preferred embodiment of the utility model (card insert type).

Heat sink arrangement according to the anti electromagnetic wave interference that the utility model disclosed, be utilize heating radiator 20 retaining element (generally speaking, mostly be screw 30, be example only below) with screw 30, as shown in Figure 1, make its ground connection, and the electromagnetic wave that chip is produced is coupled to the antenna effect that heating radiator 20 produces, conducting is to casing, and the problem of solution Electromagnetic Interference.

The interface card (as display card) that present computer system adds, the chip of function card (as drafting card), or the CPU (central processing unit) on the main frame, because of its frequency more and more higher, so generally all can add heating radiator 20, see also Fig. 1, with CPU (central processing unit) 10 is example, CPU (central processing unit) 10 is to connect on the what circuit board 50, install heating radiator 20 thereon additional, and heating radiator 20 is fixed with screw 30 usually, utilize the screw 30 and the earth terminal 501 of circuit board 50 to join, and the electromagnetic wave that chip is produced is coupled to the antenna effect that heating radiator 20 produces, conducting is to casing, and the problem of solution Electromagnetic Interference.On the other hand, as shown in Figure 2, retaining element also screw 30 add upper cap nut 31 and fix, or general common on the market metal fastener (not shown) also can reach identical effect, makes electromagnetic waveguide pass to casing.

Another embodiment of the present utility model is on the what circuit board 50, installs a flexible member that is electrical connected with 501 one-tenth of earth terminals additional, sees also Fig. 3, and retaining element is attached thereto and connects, and can guarantee absolutely ground connection of retaining element.And flexible member can be a shell fragment 40, and shell fragment 40 is one roughly to be the sheet metal of U type, can be the common metal bending and constitutes, or utilize beryllium copper again through heat treated; Shell fragment 40 1 sides are on the affixed what motherboard 50 of usable surface mount technology (surfacemount technology) mode (SMT), make opposite side that certain elasticity be arranged, when screw 30 is pinned, can contact with shell fragment 40 and can guarantee absolutely ground connection of screw 30.Like this, when CPU (central processing unit) 10 is done the time spent, the electromagnetic wave that it produced can be along heat radiator 20, screw 30.Earth terminal 501 these routes that are electrical connected of shell fragment 40 and motherboard 50, the electromagnetic wave that chip is produced are coupled to the antenna effect that heating radiator 20 produces, and conducting is to casing, and the problem of solution Electromagnetic Interference

On the other hand, as shown in Figure 4, be the CPU (central processing unit) 10 of card insert type or other interface card, function card, only illustrate the CPU (central processing unit) 10 of card insert type among the figure, its earthing mode also is identical, and in addition the top of what plug-in card 60 installs a Metallic rod 70 that links to each other with ground path 80 additional, the electromagnetic wave that the central processing cup unit 10 of card insert type is produced, direct and the casing conducting of energy, and solve its problem.

The heat sink arrangement that the utility model provides a kind of anti electromagnetic wave to disturb, the shell fragment that utilizes existing retaining element to make contact one and ground path become to be electrical connected guaranteeing retaining element a hundred per cent ground connection, and can solve the problem of Electromagnetic Interference.

The above only is the utility model preferred embodiment wherein, is not to be used for limiting the utility model; Every person skilled in the art person also can make all equivalence variations and equivalence replacement under the prerequisite of spirit of the present utility model, but these equivalence variations and equivalent replacement all should be included in the utility model scope of patent protection.

Claims

1, a kind of heat sink arrangement of anti electromagnetic wave interference is characterized in that, includes at least:

One circuit board possesses at least an earth terminal is arranged;

One heating radiator; And

The retaining element of one conduction, its fixing described circuit board of described heating radiator what, and join with the earth terminal of described circuit board.

2, the heat sink arrangement of anti electromagnetic wave interference as claimed in claim 1 is characterized in that described retaining element is to be a screw.

3, the heat sink arrangement of anti electromagnetic wave interference as claimed in claim 2 is characterized in that described retaining element also includes a nut.

4, the heat sink arrangement of anti electromagnetic wave interference as claimed in claim 1 is characterized in that described retaining element is a metal fastener.

5, the heat sink arrangement of anti electromagnetic wave interference as claimed in claim 1 is characterized in that described retaining element is to join by a conductive flexible member and described earth terminal.

6, the heat sink arrangement of anti electromagnetic wave interference as claimed in claim 5 is characterized in that described flexible member is a shell fragment.

7, the heat sink arrangement that disturbs of anti electromagnetic wave as claimed in claim 6 is characterized in that, the material of described shell fragment is a beryllium copper and through heat treated.

8, the heat sink arrangement of anti electromagnetic wave interference as claimed in claim 1 is characterized in that described earth terminal also is connected with a Metallic rod.