CN2845165Y - Clamping device with adjustable elasticity - Google Patents

Abstract

The utility model relates to a clamping device with adjustable elasticity, which is matched with a heat radiating device of a heating element, and comprises a clamping device body, wherein the middle of the clamping device body is provided with a bridging part protruding to the opposite direction of the surface of the heat radiating device, and both ends of the body protrude the side wall of the heat radiating device to respectively form an elastic arm which is arranged in a certain dip angle correspondingly to the surface of the heat radiating device; the tail ends of the elastic arms are respectively provided with a clamp hook of the clamping device, screw-thread clamp hooks are respectively arranged on the clamp hooks of the clamping device, screw-thread sleeves on one end of the screw-thread clamp hooks are provided with nuts, and the other end of the screw-thread clamp hooks is buckled with clamp rings which are adjacent to the opposite angles of the heat radiating device on a mother board. The heat radiating device is buckled on the mother board, and meanwhile, the pressure of the clamping device to the heat radiating device can be changed by adjusting the height of the nuts of both of the two ends on the screw-thread clamp hooks.

Description

Scalable elastic force fastener

[Ji Intraoperative field]

The relevant a kind of faster for radiating device of the utility model, and the faster for radiating device of relevant a kind of scalable elastic force particularly can be regulated the pressure that fastener puts on heat abstractor.

[Bei Jing Ji Intraoperative]

High speed development along with computer and information technology, the integrated level of computer chip is more and more higher, the integrated of various electronic devices and components also constantly strengthens, therefore its heat dissipation problem is also more and more outstanding, if the heat of electronic circuit can not get getting rid of timely and effectively (i.e. heat radiation), electronic building brick can not steady operation even can be burnt.Therefore various heat dissipation equipments meet the tendency and lead, and wherein air-cooled radiator is the heat dissipation equipment that flows the Room on the market most.Its structure be with a thermal conductivity preferably fin be close to the bigger electronic building brick of caloric value, above fin, fix a fan again, utilize modes such as heat conduction, cross-ventilation to dispel the heat for electronic building brick.Whether electronic building brick contacts with fin closely is the effect key factor that directly affects heat radiation.

Some seem very smooth smooth surface, can see that at microscopically there is millions of micropores on the surface.Because the existence of electronic building brick surface micropore, real contact has only wherein some points on two surfaces of being close to.According to the data introduction, general contact area only accounts for about 20%, and other place then is full of by air.General knowledge is told us the Cu as fin material, Al has heat conductivility preferably, and air is the very poor material of a kind of thermal conductivity (20 ℃ time conductive coefficient be about 0.024W/mK), and conductive coefficient is about 1/8333 of Al.Although therefore fin has good heat-conducting, because between electronic building brick and fin is not that the face of being expected contacts, but some contact, promptly as between the electronic building brick of pyrotoxin surface, west and the fin by air separated, thereby its contact heat resistance is very big, and air becomes the obstacle that conducts heat between electronic building brick and the fin.

In order to solve " contact " problem, conventional method is to be coated with the last layer heat-conducting medium between the electronic building brick of fin and heating, utilize the contact area of heat-conducting medium blind, increase thermal source and fin, the heat output that reduces the hot-fluid distance, increases, to increase combining between fin and electronic building brick, improve the defective of " some contact ".Increase the contact-making surface between fin and electronic building brick like this, played thermolysis preferably.But it is not all right having only these, and this moment, fin did not contact fully with the electronic building brick of heating, need apply enough pressure and make heat-conducting medium become thinner, thereby the design of fastener is used and given birth to.

And fastener is used for fixing fin, well contacts with the processor surface to guarantee the fin bottom, guarantees that fin and thermal source have certain contact area, give full play to radiating effect.The design of fastener must guarantee that the fastener center of gravity overlaps with the processor center, and except make radiator bottom and processor evenly stressed, the size of compressive stres also must control.The radiator that bottom thickness is different promptly uses same fastener, and pressure also can change.Pressure is too little can to produce the space, and severe patient can get loose, and increases thermal resistance; Too processor is damaged in conference by pressure.Therefore the pressure of fastener must be controlled within the specific limits.Yet the existing at present following shortcoming of fastener ubiquity:

1. fastener is made up of single body, and elastic force is fixed, and is unadjustable, narrow application range; At the elastic force that the design starting stage just needs detailed design to need well, versatility is lower;

2. along with prolong service time, fastener elasticity diminishes gradually, causes fin and euthermic chip contact pressure not enough, has reduced heat dispersion;

3. fastener is in fin and the assembling of euthermic chip motherboard, and it is inconsistent pressure at two ends to occur, causes fin and euthermic chip contact force even inadequately, has reduced heat dispersion.

In view of this, in fact be necessary to provide a kind of fastener of heat sink structure, not only highly versatile can use for a long time, also can regulate the pressure that heat abstractor puts on euthermic chip.

[summary of the invention]

Therefore, the purpose of this utility model just provides a kind of scalable elastic force fastener, and this fastener can be regulated the pressure that heat abstractor puts on euthermic chip, so that heat abstractor contacts with euthermic chip is tightr, thereby improves the heat dispersion of heat abstractor.

For reaching above-mentioned purpose, the utility model provides a kind of scalable elastic force fastener, be used with the heat abstractor of heat generating component, comprise a fastener body, this fastener body middle part is provided with one to the bridge part that deviates from this heat abstractor surface direction projection, and these body two ends are protruded the heat abstractor sidewall and are respectively formed an elasticity arm, the relative heat abstractor of this elasticity arm surface is certain inclination angle and is provided with, and the end of this elasticity arm respectively is provided with a fastener trip, the sheathed screw thread trip of difference on it, the thread bush of this screw thread trip one end is provided with a nut, its other end then with motherboard near the heat abstractor diagonal angle snap ring be interlockingly connected, and this heat abstractor button is fixed on the motherboard, simultaneously by regulating the height of two end nuts on the screw thread trip, can change the pressure that fastener puts on heat abstractor.

Another purpose of the present utility model is to provide positioning piece, this keeper can be sheathed on the bridge part at fastener body middle part, when being arranged in heat abstractor, by with the both sides radiating fin on lug offset can fixed fastener, prevent that it from ejecting from heat abstractor.

Compared to prior art, the utility model can change the pressure that fastener puts on heat abstractor by the adjusting to two end nuts height on the screw thread trip, and it is tightr that heat abstractor is contacted with euthermic chip, thereby improves the heat abstractor heat dispersion.Other provides positioning piece, fastener body can be fixed.

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 is the application schematic diagram of the utility model scalable elastic force fastener.

Fig. 2 is the schematic perspective view of the utility model scalable elastic force buckle structure.

[embodiment]

See also shown in Figure 1, application schematic diagram for the utility model scalable elastic force fastener, cover a heat abstractor 50 on the motherboard 40, the some radiating fins 51 of these heat abstractor 50 tops for arranging in length and breadth, be provided with two row's lugs 52 relatively on its both sides, middle part radiating fin 51, this fastener 10 is from wherein passing, its middle part is arranged with positioning piece 20, these keeper 20 tops are fixing with fastener 10 by being held in lug 52, in addition its two ends edge is detained respectively and is fixed in screw thread trip 31, provides pressure by the elastic deformation of fastener for heat abstractor 50.

Please consult shown in Figure 2 jointly, schematic perspective view for the utility model scalable elastic force buckle structure, this scalable elastic force fastener comprises a fastener body 10, these fastener body 10 middle parts are provided with one to the bridge part 11 that deviates from this heat abstractor surface direction projection, and its top is parallel with heat abstractor 50 surfaces; And these body 10 two ends are protruded heat abstractor 50 sidewalls and are respectively formed an elasticity arm 12, and these elasticity arm 12 relative heat abstractor surfaces are certain inclination angle and are provided with; These elasticity arm 12 ends are connected with a horizontal component, its end respectively is provided with a fastener trip 13, this fastener trip 13 can be sheathed on a screw thread trip 31, the thread bush of these screw thread trip 31 1 ends is provided with a nut 30, its other end then with motherboard 40 near heat abstractor 50 diagonal angles snap ring 41 be interlockingly connected.Other is provided with positioning piece 20, in present embodiment, this keeper 20 is that sheet metal one bending is shaped, its bottom is a long and narrow circular arc location notch 22, and the content space of this location notch 22 is suitable with the fastener body thickness, and its upper end open is slightly narrow, and opening part both sides shell fragment 21 outwards opens respectively, when being arranged in heat abstractor 50, by with both sides radiating fin 51 on lug 52 offset can fixed fastener, prevent that it from ejecting from heat abstractor 50.

Please together consult illustrated in figures 1 and 2ly, when fastener body 10 is installed, earlier this keeper 20 is sheathed on fastener body 10 middle part bridge parts 11, make this bridge part 11 place the content space of location notch 22 fully.For this fastener body 10 is arranged in heat abstractor 50 middle parts, when fastener is pushed in heat abstractor 50, both sides radiating fin 52 can be held in shell fragment 21 back sides, pushing two shell fragments 21 with hand can make the fastener landing go in the heat abstractor, this moment, shell fragment 21 was pushed by the both sides radiating fin, and its top is held in lug 51, and the elastic force that is produced by shell fragment 21 deformation makes location notch 22 upper end open shrink, and location notch 22 outer walls inwardly push fastener body 10, so can fastener body 10 is fixing.Then two ends fastener trip 13 is sheathed on screw thread trip 31 respectively, with nut 30 sheathed screw threads thereon, screw thread trip 31 other ends are sheathed on snap ring 41.

During use, turn two end nuts 30 downwards simultaneously, nut 30 will be held in fastener trip 13.At this moment, fastener trip 13 is subjected to downward pressure and pops up, because the interaction of power, elasticity arm 12 bears onesize pressure, and offset to obtain equal elastic force by self elastic deformation, then this elastic force is passed to heat abstractor 50 as fastener body 10 middle parts of its fulcrum.On the other hand, because fastener trip 13 upwards pushes against nut 30, upwards mention thereby drive nut trip 31, make nut trip 31 lower end trips strain at snap ring 41, its size equates that with the elastic force that elasticity arm 12 is produced the pressure that promptly puts on heat abstractor is provided by motherboard 40.Along with continuing of nut 30 action downwards, the pressure that fastener trip 13 is subjected to is more and more big, and that the deformation of elasticity arm 12 also more gets brighter is apparent.Because the elastic force of this elasticity arm 12 has certain scope (it is relevant with angle that the material of fastener, diameter and elasticity arm tilt) in design, stubborn when motionless when nut 30, promptly this fastener reaches its maximum elastic force value.Therefore this maximum elastic force value can not guarantee the safe handling of fastener with the euthermic chip crushing.Whether should observe two nuts, 30 top number of threads this moment identical, if unequal, should be regulated, otherwise will cause putting on the pressure inequality of heat abstractor 50, not only influences the heat dispersion of euthermic chip, and may damage euthermic chip.Equally, if after long-time the use, in case find that the elasticity of fastener diminishes gradually or heat abstractor 50 is loosening, just need readjust the height of nut 30, to guarantee enough elastic force, so can prolong the useful life of fastener, and applicable to different heat abstractors.

Compared to prior art, the utility model is by the adjusting to two end nuts 30 height on screw thread trip 31, can change the pressure that fastener body 10 puts on heat abstractor 50, it is tightr that heat abstractor 50 is contacted with euthermic chip, thereby improve heat abstractor 50 heat dispersions.Other provides positioning piece 20, can fastener body 10 is fixing.

Claims (6)

1. scalable elastic force fastener, be used with the heat abstractor of heater element, it is characterized in that this fastener comprises: a fastener body, this fastener body middle part is provided with one to the bridge part that deviates from this heat abstractor surface direction projection, and these body two ends are protruded the heat abstractor sidewall and are respectively formed an elasticity arm, the end of this elasticity arm respectively is provided with a fastener trip, the sheathed screw thread trip of difference on it, the thread bush of this screw thread trip one end is provided with a nut, its other end then with motherboard near the heat abstractor diagonal angle snap ring be interlockingly connected.

2. scalable elastic force fastener as claimed in claim 1 is characterized in that: some radiating fins are arranged at this heat abstractor top in length and breadth, are provided with two row's lugs relatively on its both sides, middle part radiating fin.

3. scalable elastic force fastener as claimed in claim 1 is characterized in that: the relative heat abstractor of this elasticity arm surface is certain inclination angle and is provided with.

4. scalable elastic force fastener as claimed in claim 1 is characterized in that: the bridge part at fastener body middle part is arranged with positioning piece in addition.

5. scalable elastic force fastener as claimed in claim 4 is characterized in that: these keeper top open part two shell fragments outwards open respectively, when being installed in heat abstractor in order to support the both sides radiating fin with and upper lug and fixed fastener body.

6. scalable elastic force fastener as claimed in claim 4 is characterized in that: this keeper bottom is long and narrow circular-arc location notch, is sheathed on the bridge part at fastener body middle part.