CN2580734Y

CN2580734Y - Means for shielding and heat-radiation

Info

Publication number: CN2580734Y
Application number: CN 02284768
Authority: CN
Inventors: 吴国泰
Original assignee: Accton Technology Corp
Current assignee: Accton Technology Corp
Priority date: 2002-11-13
Filing date: 2002-11-13
Publication date: 2003-10-15
Anticipated expiration: 2012-11-13

Abstract

The utility model relates to a device for shielding and heat-radiation, which comprise a housing and a shrapnel, wherein, the housing is divided into a plurality of containing chambers by a plurality of side walls and partitions, and each containing room can contain at least one electronic component on a circuit board. The shrapnel is provided with a contact part, an adjusting part and a 7-shaped fastening part. When the fastening part of the shrapnel is hooked and fastened on the side walls and the partitions, and the device for shielding and heat-radiation is fixed on the circuit board, with the elasticity of the adjusting part, the optimal contact state between the contact part and the electronic components can be adjusted automatically so as to achieve the functions of heat-radiation and preventing electromagnetic interference.

Description

Cover and heat abstractor

Technical field

The utility model relates to a kind of covering and heat abstractor, particularly relates to a kind of shell fragment and many rooms with contact chip, to possess covering and heat abstractor of heat radiation and shielding function.

Background technology

Fig. 1 is the disclosed mask 7 of No. 89206318 patent application case of Taiwan patent (announcing No. 477516), and it comprises framework 71 and lid 72, in order to cover the chip of being located on the substrate 8 81, is subjected to outside electromagnetic interference to prevent this chip 81.

Yet, this existing mask 7 so only have the function of anti-electromagnetic interference, does not have heat sinking function because of directly not contacting with chip 81, the heat that causes chip 81 to be produced only can pass through the framework 71 and lid 72 heat radiations of mask 7 more indirectly by the cross-ventilation in the mask 7.But air is not the good conductor of heat, and is closed in that air also are difficult for convection current in the mask 7, and simultaneously, some heats by transfer of air need just can distribute through framework 71 and lid 72 double-layer structures.We can say that this existing mask 7 only has the function of anti-electromagnetic interference, and do not have a heat sinking function.So, this existing mask 7 will not be suitable for the wideband chip of high flow rate power, because the wideband chip is under " linear demand " of circuit, to consume high power and produce high heat simultaneously, therefore the need otherwise designed possesses the masking device of great heat radiation effect, just can keep the normal working temperature of wideband chip.

On the other hand, the size of existing mask 7 is big a lot of and do not have the separation room than chip 81 sizes, therefore only holds 81 1 electronic building bricks of chip as if in the mask 7, will waste substrate 8 big quantity spaces, does not meet the compact trend of electronic product; If mask 7 is interior except chip 81, hold other electronic building brick or other chip in addition, because of each electronic building brick or each chip are not that branch is in each room, then these electronic building bricks may produce electromagnetic interference to chip 81, or each chip chamber mutual electromagnetic interference, forfeiture is provided with the original meaning of mask.

Otherwise if mask 7 sizes are identical with chip size, then the chip 81 of different size just need cooperate the mask 7 of different size, can't be applicable to the chip of various sizes with a masking device, thereby increases the die cost of mask 7.

Summary of the invention

At above-mentioned the deficiencies in the prior art, the purpose of this utility model is to provide a kind of and covers and heat abstractor, has the function of anti-electromagnetic interference.

Another purpose of the present utility model is to provide a kind of and covers and heat abstractor, has the function of group's electronic building brick heat radiation.

Another purpose of the present utility model is to provide a kind of and covers and heat abstractor, possesses the function of heat radiation and anti-electromagnetic interference.

Another purpose of the present utility model is to provide a kind of and covers and heat abstractor, has to separate simultaneously to cover a plurality of electronic building bricks, in case the function of electromagnetic interference.

Another purpose of the present utility model is to provide a kind of and covers and heat abstractor, has the function that helps the electronic building brick heat radiation that a plurality of separations hold simultaneously.

Another purpose of the present utility model is to provide a kind of and covers and heat abstractor, possesses the function that the electronic building brick that helps a plurality of separations to hold dispels the heat and prevents electromagnetic interference.

Another purpose of the present utility model is to provide a kind of can be applicable to covering and heat abstractor of multiple size chip, has the function of saving die cost.

For achieving the above object, the utility model provides a kind of and covers and heat abstractor, and in order to cover at least one electronic building brick on the circuit board and to supply its heat radiation, it comprises: a housing, have many rooms, and each room all can hold this electronic building brick; And a shell fragment, have a contact site, when this shell fragment was fixed in this housing, this contact site contacted this electronic building brick, to conduct the heat that this electronic building brick produces, covered this electronic building brick simultaneously in order to avoid by electromagnetic interference.

Described covering and heat abstractor, wherein this housing has many sidewalls and many partition walls defining these rooms, and at least one partition wall and/or sidewall have a button hole, at least one cramp engaging that the ammunition feed sheet is had.

Described covering and heat abstractor, wherein this sidewall or this partition wall have many tabs, so that this housing is fixed in this circuit board.

Described covering and heat abstractor, wherein this shell fragment has an adjustment part respectively in these contact site both sides, to adjust the contact condition of this contact site and this electronic building brick.

Described covering and heat abstractor, wherein this shell fragment has opposing " 7 " font clamping part respectively in two ends, with sidewall or the partition wall that is hooked in this housing.

Brief Description Of Drawings

In order further to understand the utility model is technological means and the effect thereof that the predetermined purpose of realization is taked, see also following detailed description and accompanying drawing about the utility model specific embodiment, yet appended accompanying drawing only provides reference and explanation usefulness, is not to be used for the utility model is limited.

In the accompanying drawing,

Fig. 1 is the three-dimensional exploded view of existing mask;

Fig. 2 is that the utility model covers and the three-dimensional exploded view of heat abstractor;

Fig. 3 is that the utility model covers and the three-dimensional combination figure of heat abstractor;

Fig. 4 is the cutaway view of Fig. 3 along the IV-IV direction.

Embodiment

Shown in Fig. 2-4, of the present utility model cover and heat abstractor 1 comprises a housing 2 and is snapped in a shell fragment 3 of this housing 2.

This housing 2 is bent into a cuboid by a sheet metal punching, include long and relative the first side wall 21 and one second sidewall 22, short and relative one the 3rd sidewall 23 and one the 4th sidewall 24, by roof bend downward vertically form and one first partition wall 25 of parallel third and

fourth sidewall

23,24 with one second partition wall 26, vertically be connected one the 3rd partition wall 27, and many rooms 28 of defining jointly by a plurality of walls such as these

sidewalls

21,22,23,24 and

partition walls

25,26,27 of this first and second partition wall 25,26.Wherein first and

second sidewall

21,22 respectively has a lug 211 in vertical two ends, can be fastened in the corresponding hole clipping 231 of third and

fourth sidewall

23,24 two ends institute tools, forming this rectangular housing 2, and rectangular housing 2 inside are divided into many rooms 28 by first, second and

third partition wall

25,26,27.

In addition, the first side wall 21 has one first button hole 213 in vertical central authorities, and the 3rd partition wall 27 has one second button hole 271 in vertical central authorities.And the lower end of each

sidewall

21,22,23,24 and each

partition wall

25,26,27 all has a plurality of downward tabs 215.

Shell fragment 3 also is by a sheet metal punching bending forming, and one first adjustment part 32 that comprise the contact site 31 that is positioned at central authorities, tilt to be connected these contact site 31 two ends is with one second adjustment part 33, be connected first adjustment part 32 and second adjustment part, 33 other ends and mutually privately perpendicular to one first clamping part 34 and one second clamping part 35 of " 7 " font of contact site 31 respectively.Simultaneously, the long plumbing arm of two " 7 "

font clamping parts

34,35 all has a buckling piece 341 that stamps out.

First clamping part 34 of shell fragment 3 is hooked in the 3rd partition wall 27, and makes the buckling piece 341 of first clamping part 34 be snapped in second button hole 271 of the 3rd partition wall 27.Similarly, second clamping part 35 of shell fragment 3 is hooked in the first side wall 21, and makes the buckling piece 341 of second clamping part 35 be snapped in first button hole 213 of the first side wall 21, to form of the present utility model covering and heat abstractor 1.

The utility model covered and many tabs 215 of heat abstractor 1 insert multiple-grooved hole 41 corresponding on the circuit boards, bend tab 215 or welding or two kinds of dual-purposes again and will cover and heat abstractor 1 is fixed in circuit board 4.The contact site 31 of shell fragment 3 just is contacted with the end face of the electronic building brick 42 of chip at this moment, and elasticity by first and

second adjustment part

32,33, automatically adjust the optimum contacting state of contact site 31 and electronic building brick 42, make the heat that electronic building brick produced, can conduct to by shell fragment and have covering and heat abstractor 1 integral body of high surface area, and realize good heat radiating function.On the other hand because electronic building brick by sidewall, partition wall, and shell fragment surround, therefore also have the function that well prevents electromagnetic interference.

The utility model cover and the housing 2 of heat abstractor 1 except aforementioned punching bending forming, also can be one-body molded.And combining of shell fragment 3 and housing 2 except aforementioned buckle, also can be aided with welding, again to strengthen the linking steady character of two members.In addition, of the present utility model covering and the room 28 of heat abstractor 1 because of having a plurality of different sizes, therefore can be according to the size Selection of electronic building brick 42 suitable room 28, make one to cover heat abstractor 1 and just can be common to multiple electronic building brick 42 sizes, to realize reducing the effect of die sinking cost.Certainly each room 28 also can hold other chip or electronic building brick 42 respectively, each

sidewall

21,22,23,24 and each

partition wall

25,26,27 also can all have a button hole 213 or 271 simultaneously, make each room can engage a shell fragment 3 respectively, with the conduction heat that respectively electronic building bricks 42 are produced in this room 28 and distribute.

Yet above-mentioned only is preferred embodiment of the present utility model, can not limit the scope that the utility model is implemented with this, every simple equivalent of being done according to the utility model claim and utility model description changes and modifies, and all should belong in the scope that the utility model patent contained.

Claims

1, a kind of covering and heat abstractor in order to cover at least one electronic building brick on the circuit board and to supply its heat radiation, is characterized in that it comprises:

One housing has many rooms, and each room all can hold this electronic building brick; And

One shell fragment has a contact site, and when this shell fragment was fixed in this housing, this contact site contacted this electronic building brick, to conduct the heat that this electronic building brick produces, covers this electronic building brick simultaneously in order to avoid by electromagnetic interference.

2, according to claim 1 covering and heat abstractor is characterized in that, this housing has many sidewalls and many partition walls defining these rooms, and at least one partition wall and/or sidewall have a button hole, at least one cramp engaging that the ammunition feed sheet is had.

3, according to claim 2 covering and heat abstractor is characterized in that, this sidewall or this partition wall have many tabs, so that this housing is fixed in this circuit board.

4, according to claim 2 covering and heat abstractor is characterized in that, this shell fragment has an adjustment part respectively in these contact site both sides, to adjust the contact condition of this contact site and this electronic building brick.

5, according to claim 2 covering and heat abstractor is characterized in that, this shell fragment has opposing " 7 " font clamping part respectively in two ends, with sidewall or the partition wall that is hooked in this housing.