CN202585390U

CN202585390U - Radiating fin

Info

Publication number: CN202585390U
Application number: CN 201220136448
Authority: CN
Inventors: 洪灵; 罗学云; 何俊兴
Original assignee: Zhejiang Xiying Science & Technology Co Ltd
Current assignee: ZHEJIANG SHEEN TECHNOLOGY Co Ltd
Priority date: 2012-03-31
Filing date: 2012-03-31
Publication date: 2012-12-05
Anticipated expiration: 2022-03-31

Abstract

The utility model relates to a radiating fin which is mainly used for heat dissipation of an electronic component. The radiating fin comprises a main sheet body and a pin. The main sheet body is provided with a pin insertion port and a chip installation hole. The pin comprises a tip portion and an end portion. The tip portion and the end portion form one body. The end portion of the pin is inserted into the pin insertion port. A thickness of the end portion of the pin is the same with the thickness of the pin insertion port and the two are matched with each other. A width of the end portion of the pin is greater than the width of the pin insertion port. Two sides of the end portion of the pin are located outside the pin insertion port. The end portion of the pin and the pin insertion port form interference fitting. The two sides of the end portion of the pin are hammered so that the two sides of the end portion are deformed and expanded to the main sheet body. The structure of the radiating fin of the utility model is designed reasonably. Operation is simple. Experiment personnel can conveniently manufacture the radiating fin needed by the experiment. Embarrassment of producing the single radiating fin by using a mass production mode or using tools of a special mold and the like is avoided.

Description

A kind of fin

Technical field

The utility model relates to a kind of fin, is mainly used in the heat radiation of electronic devices and components.

Background technology

Fin is a kind of device of giving the easy heat-generating electronic elements heat radiation in the electrical equipment; How make tabular, sheet, splintery etc. by aluminium alloy, brass or bronze; Will use considerable fin like cpu central processing unit in the computer, and for example element such as power tube all will use fin in the Switching Power Supply.General fin in use will be coated with the last layer heat-conducting silicone grease at electronic component and fin contact-making surface, and the heat that components and parts are sent is more effective to be transmitted on the fin, is dispersed in the surrounding air through fin and goes.

In the electronic circuit board of large power, electrically product-deriveds such as Switching Power Supply; Easy heating components and parts such as high power transistor, high-power FET, rectifying tube are ubiquitous; Need in the use to cooperate fin to take away the heat that produces in the work; Otherwise excessive heat can cause the electronic devices and components fault, even causes the whole system collapse.There is statistics to show, 2 ℃ of the every risings of electronic devices and components temperature, reliability decrease 10%, 1/6 the when life-span during 50 ℃ of temperature rises has only temperature rise to be 25 ℃.And this type of high frequency switch power has the equipment of high-power heater members, and temperature influences the most important factor of its reliability especially.Therefore, fin has application very widely in this type circuit board.

Pin is that fin is fixed on the part on the circuit board, and the part of Chang Zuowei radiator occurs, but the convenience of making for radiator is often separated manufacturing with fin and pin, couples together with other way again.

The aluminium fin is good owing to radiating effect, and processing mode is simple, the application that has obtained batch with low cost.But, so in actual use, need the copper material pin be fixed in the aluminium heat sink through other technology, to make things convenient for the use of aluminium heat sink because aluminium can't be directly weld with pcb board.At present; The aluminium heat sink of producing in batches is technical very ripe in fixing " welding pin "; But in new product development; The circuit developer is being perplexed in the making of the fin of single-piece demand always, if utilize the mode of producing in batches to remove to obtain single or several fin, will inevitably increase cost and also lose time simultaneously.Therefore the method that how to obtain the single-piece fin with simple machining tool in the laboratory is very significant.

Referring to Fig. 1, be the batch heat radiating fin structure form of generally using at present, aluminium heat sink and welding pin adopt clinching method to fix.High-power relatively series of products, higher to the positioning accuracy request of fin, corresponding, also can propose higher requirement for machining accuracy, the positioning accuracy of the copper sheet of aluminium fin riveted joint, thereby cause the high problem of processing cost.And because copper sheet is riveted on the aluminium fin, thereby the copper sheet that also usually can occur riveting gets loose, crooked phenomenon, causes fixing not firm, the problem that can't fix of fin, influences radiating effect.And in the fin manufacturing, need the equipment and mold that dashes staking of specialty, be not suitable for test with single-piece or small lot batch manufacture demand.

Chinese patent number: 200920246279.6, a kind of aluminium fin is disclosed, have one-time formed fixing feet, the fixing feet outer surface is coated with and can welds material; Fixing feet is connected to the aluminium fin on the pcb board through the scolding tin welding manner through welding material, therefore can solve the technology difficult problem that traditional aluminium fin can't weld.Its defective is: during fin is made, need professional diel and be used for the equipment that surperficial plating can be welded material, cost is higher, also is not suitable for test with single-piece or small lot batch manufacture demand.

The utility model content

The utility model technical problem to be solved is to overcome existing above-mentioned deficiency in the prior art, and a kind of reasonable in design is provided, and easily manufactured, pin connects reliable fin.

The utility model solves the problems of the technologies described above the technical scheme that is adopted: a kind of fin; Comprise main leaf body and pin; It is characterized in that: have pin on the described main leaf body and insert mouth and chip installing hole, described pin comprises tip and end, and tip and end are one; The end of said pin is inserted pin and is inserted mouth, and the pin end portion thickness equates that with the thickness that pin inserts mouth both match each other; The width of described pin end is greater than the width of pin insertion mouth, and the both sides of pin end are positioned at pin and insert outside the mouth; Described pin end is inserted between the mouth with pin and is connected through interference; The chip installing hole is used to install chip.

The described interference of the utility model connects the both sides that are meant hammering pin end, makes the both sides of end be out of shape also swelling to main leaf body.

The material of the described main leaf body of the utility model is an aluminium, and the material of pin is a copper.

The utility model compared with prior art; Has following positive effect: reasonable in design; Simple to operate, the experimenter can make easily needs the practice ground fin, avoids using the mode of production in enormous quantities or the embarrassment that special-purpose instruments such as mould remove to produce single fin.

Description of drawings

Fig. 1 is the decomposition texture sketch map of the utility model.

Fig. 2 inserts the structural representation of main leaf body for the utility model pin.

Fig. 3 is the structural representation that interference connects behind the utility model hammering pin.

Fig. 4 is the structure for amplifying sketch map of a-quadrant among Fig. 1.

Fig. 5 is the structure for amplifying sketch map in B zone among Fig. 2.

Among the figure: 1 main leaf body, 11 chip installing holes, 12 pins insert mouth, 2 pins, 21 tips, 22 ends, 3 screws, 4 chips.

Embodiment

Below in conjunction with accompanying drawing and through embodiment the utility model is described further.

Embodiment:

Referring to Fig. 1～Fig. 5, present embodiment comprises main leaf body 1 and pin 2, has pin on the main leaf body 1 and inserts mouth 12 and chip installing hole 11, and described pin 2 comprises tip 21 and end 22, and tip 21 is an one with end 22; The end 22 of said pin 2 is inserted pin and is inserted mouth 12, and the thickness h 1 of end 22 equates that with the thickness h 2 that pin inserts mouth 12 both match each other; The width H1 of described end 22 is greater than the width H2 of pin insertion mouth 12, and the both sides of end 22 are positioned at pin and insert outside the mouth 12; Described end 22 is inserted between the mouth 12 with pin and is connected through interference, and the both sides of hammering end 22 make the both sides of end 22 be out of shape also swelling to main leaf body 1.

In the present embodiment, the material of main leaf body 1 is an aluminium, and the material of pin 2 is a copper.

Present embodiment is easy to make, and the experimenter can make easily needs the practice ground fin, and concrete steps are following:

(1) get the aluminium flake of required thickness, cutting obtains the size of actual needs, as main leaf body 1;

(2) line make pin insert mouthfuls 12 with position such as chip installing hole 11, and cut out pin and insert mouthfuls 12, get out chip installing hole 11;

(3) utilize copper sheet to cut out pin 2;

(4) pin 2 is inserted in the pin insertion mouth 12 of main leaf body 1, the both sides of pin end 22 are positioned at pin and insert outside the mouth 12;

(5) with the both sides of instrument hammering leads ends portions 22 such as iron hammer, make its distortion and swelling to main leaf body 1, obtain both interference fit joint;

(6) be screwed into chip installing hole 11 with screw 3 at last chip 4 is installed.

In addition, need to prove, specific embodiment described in this specification, as long as the undeclared concrete shape and size of its part, then this part can be Any shape and the size that adapts with its structure; Simultaneously, the part title of getting also can be different.Allly conceive equivalence or the simple change that described structure, characteristic and principle are done, include in the protection range of the utility model patent according to the utility model patent.

Claims

1. a fin comprises main leaf body and pin, it is characterized in that: have pin on the described main leaf body and insert mouth and chip installing hole, described pin comprises tip and end, and tip and end are one; The end of said pin is inserted pin and is inserted mouth, and the pin end portion thickness equates that with the thickness that pin inserts mouth both match each other; The width of described pin end is greater than the width of pin insertion mouth, and the both sides of pin end are positioned at pin and insert outside the mouth; Described pin end is inserted between the mouth with pin and is connected through interference.

2. a kind of fin according to claim 1 is characterized in that: described interference connects the both sides that are meant hammering pin end, makes the both sides of end be out of shape also swelling to main leaf body.

3. a kind of fin according to claim 1 and 2 is characterized in that: the material of described main leaf body is an aluminium, and the material of pin is a copper.