CN2896523Y

CN2896523Y - Spring-force-adjustable fixing fastener

Info

Publication number: CN2896523Y
Application number: CN 200620069877
Authority: CN
Inventors: 余春杨
Original assignee: Mitac Precision Technology Kunshan Ltd
Current assignee: Mitac Precision Technology Kunshan Ltd
Priority date: 2006-03-02
Filing date: 2006-03-02
Publication date: 2007-05-02
Anticipated expiration: 2016-03-02

Abstract

An adjustable elastic fixing buckle is matched with heat-extracting strips to be applied to heat-extraction technology on the exothermic chips of the electronic products. Wherein, the fixing buckle includes a housing, the central part of which is a cylinder structure, which has an extending object at each end. One of the extending objects is in screw structure and a nut combines to be assembled on the screw structure. The other end opposite to the screw structure has a U-shaped head for fixing the heat-extracting strips onto the exothermic chips. Another spring is coated over the housing. By the above structure, the heat-extracting strips can be fixed on the exothermic chips. And by adjusting the location of the nut, the spring will have elastic deformation to regulate the stress of the exothermic chips by the heat-extracting strips.

Description

The fixed fastener of scalable elastic force

[technical field]

The relevant a kind of fixed fastener of the utility model, and particularly relevant for a kind of fixed fastener that is applicable to the scalable elastic force in the electronic chip heat dissipation technology.

[background technology]

Along with the development of electronic industry, the transistor density of various electronic building bricks increases day by day, and the speed of deal with data is also more and more faster.As everyone knows, electronic building brick all can produce heat when work, and increase along with arithmetic speed, the power of its consumption and the heat of generation also increase thereupon, therefore we must utilize heat abstractor to come to distribute the heat that electronic building brick produces to the external world in time, be used for reducing the temperature of electronic building brick, to keep its normal steady operation.

Fastener is one of heat abstractor accessory of fixing cooling fins and euthermic chip, and the elastic force of fastener directly affects the contact pressure between fin and the euthermic chip, and pressure is big more in theory, and the contact area between fin and the euthermic chip is big more, and thermal resistance is just more little; But in fact between fin and the chip to contact, so just need between to add one deck Heat Conduction Material,, reduce thermal resistance to increase contact area.

Yet, increase the contact area of above-mentioned fin and euthermic chip, just need the fastener of the corresponding elastic force of design.Please refer to the concrete application schematic diagram that Figure 1 shows that existing a kind of fixed fastener, this fixed fastener comprises a body 30 and a spring 40, these body 30 middle parts are cylindrical structure, and there is a spring 40 to be sheathed on the body 30, and an end of body 30 is extended with a nut 31, the other end with respect to nut 31 is extended with a U-shaped head 50, this U-shaped head 50 comprises the connecting portion 51 that an end is connected with body 30, this connecting portion 51 is a flat structure, and the other end of connecting portion 51 is extended with an elasticity arm 52 respectively to cylindrical structure, and the inboard of above-mentioned elasticity arm step surface 54 also is provided with a block body 56, fin 20 can be fixed on the euthermic chip 10 by said structure.

During use, the U-shaped head 50 of above-mentioned fastener is subjected to the extruding of hole inwall and produces inside to a certain extent elastic deformation when passing fin assembling hole 21 and motherboard fixing hole 23, therefore can pass smoothly; After passing motherboard fixing hole 23, owing to there is not the extruding external force of hole inwall, U-shaped head 50 is returned to original shape, and then block body 56 cooperates elasticity arm step surface 54 to block motherboard 24, promptly fin 20 is fixed on the euthermic chip 10.

Be not difficult to find out that there is following shortcoming in above-mentioned Spring screws fixed fastener:

1. above-mentioned fastener elastic force is fixed, and is unadjustable; At the elastic force that the design starting stage just needs detailed design to need well, the design cycle is long; Narrow application range, versatility is lower.

2. along with the prolongation of service time, above-mentioned fastener spring diminishes gradually, causes fin and euthermic chip contact pressure not enough, reduces heat dispersion.

3. above-mentioned fastener is in assembling with the euthermic chip motherboard, and it is inconsistent four end points pressure to occur, causes fin and euthermic chip contact force even inadequately, has reduced heat dispersion.

4. above-mentioned fastener is not easy from the fin dismounting, and the assembling freedom is poor.

In view of this, be necessary to provide a kind of scalable elastic force, long service life and assemble Spring screws fixed fastener freely in fact.

[summary of the invention]

Therefore, the purpose of this utility model is to provide a kind of fixed fastener of scalable elastic force, and this fixed fastener scalable elastic force, long service life and assembling are free.

For reaching above-mentioned purpose, the invention provides a kind of fixed fastener of scalable elastic force, be used for fixing heat abstractor on euthermic chip, this fixed fastener comprises a body, this body middle part is a cylindrical structure, and above-mentioned cylindrical structure is extended with an ennation to two ends respectively, and one is a helicitic texture, is extended with a U-shaped head with respect to the other end of helicitic texture; In addition, the said fixing fastener also comprises a spring and a nut, this spring is placed on the body, and the nut cooperation is assembled on the above-mentioned helicitic texture, fin can be fixed on the euthermic chip by said structure, and, make spring produce elastic deformation and regulate fin euthermic chip pressure by the position of adjusting nut.

Compared to prior art, the utility model can be regulated fin to euthermic chip pressure in a big way, guarantees that fin contacts evenly with euthermic chip, has improved heat dispersion; And longer than unadjustable fastener physical life, assembling, dismounting is than being easier to.

For making the purpose of this utility model, structural feature and function thereof there are further understanding, cooperate diagram to be described in detail as follows now:

[description of drawings]

Fig. 1 illustrates the concrete application schematic diagram of existing a kind of fixed fastener.

Fig. 2 illustrates the decomposing schematic representation of the fixed fastener of the utility model scalable elastic force.

Fig. 3 illustrates the concrete application schematic diagram of the fixed fastener of the utility model scalable elastic force.

Fig. 4 illustrates the assembling partial enlarged drawing of the fixed fastener of the utility model scalable elastic force.

[embodiment]

See also shown in Figure 2ly, be three-dimensional exploded view of the present utility model.The Spring screws fixed fastener of this scalable elastic force comprises a body 100, these body 100 middle parts are a cylindrical structure, and this cylindrical structure is extended with an ennation to two ends respectively, one is a helicitic texture 101, the other end with respect to helicitic texture 101 is extended with a U-shaped head 200, this U-shaped head 200 comprises the connecting portion 201 that an end is connected with body 100, this connecting portion 201 is a flat structure, and the other end of connecting portion 201 is extended with an elasticity arm 202 respectively to cylindrical structure, and the inboard of above-mentioned elasticity arm step surface 204 also is provided with a block body 206, above-mentioned in addition Spring screws fixed fastener comprises that also a spring 300 and a nut 400. these springs 300 can be arranged on the above-mentioned body 100, and above-mentioned nut 400 can cooperate and is assembled on the helicitic texture 101.

See also Fig. 3, shown in Figure 4, during assembling, earlier spring 300 is arranged on the body 100, again nut 400 is assembled on the helicitic texture 101, then fin 500 is positioned on the euthermic chip 700 that is fixed on the motherboard 600, and the fixing hole 601 on fin assembling hole 501 and the motherboard 600 is alignd, U-shaped head 200 with the said fixing fastener passes fin assembling hole 501 and motherboard fixing hole 601 again, produce inside to a certain extent strain because of pass the extruding that is subjected to the hole inwall when fin is assembled hole 501 and motherboard fixing hole 601 at U-shaped head 200, so can pass fin assembling hole 501 and motherboard fixing hole 601 smoothly; Pass the fixing hole 601 of motherboard at U-shaped head 200 after, owing to there has not been the extruding external force of hole inwall, U-shaped head 200 just is returned to original shape, then block body 206 cooperates the step surface 204 of U-shaped head 200 to block motherboard 600, can be fixed on fin 500 on the motherboard 600, position by adjusting nut 400 just can 300 pairs of fin 500 of regulating spring pressure become, therefore say the pressure of just having regulated between fin 500 and the euthermic chip 700 from another angle, to realize regulating the function of elastic force.

The Spring screws fixed fastener that the utility model provides a kind of capable of regulating stretch compared with prior art has following good effect:

1. can in a big way, regulate fastener and fin, can guarantee that fin contacts with euthermic chip evenly, Improve heat dispersion.

2. use for a long time fastener, the elasticity of fastener diminishes gradually, the pressure between fastener and euthermic chip When power was reduced to a certain degree, fastener just cannot use; But the utility model is by regulating on the fastener Nut still can guarantee certain elastic force.

3. difform euthermic chip need to design the elastic force fastener that adapts with it, the utility model can Regulate elastic force in the different range, adapt to different fin and motherboard.

4. in the starting stage of the unadjustable fastener of design, the setting of elastic force can utilize the utility model Test draws.

5. the utility model assembling, dismounting is relatively easy.

Claims

1, a kind of fixed fastener of scalable elastic force, cooperate fin to be applied in the heat dissipation technology of euthermic chip on the electronic product, this fixed fastener comprises a body, this body middle part is a cylindrical structure, and there is a spring to be placed in body, it is characterized in that: above-mentioned cylindrical structure is extended with an ennation to two ends respectively, and one is a helicitic texture, is extended with a U-shaped head with respect to the other end of helicitic texture.

2, require the fixed fastener of 1 described scalable elastic force as profit, it is characterized in that: the matching thread structure is provided with a nut, to regulate the elastic force of fin and euthermic chip by the position of adjusting nut.