CN2735728Y

CN2735728Y - Electromagnetic interference preventive spring

Info

Publication number: CN2735728Y
Application number: CN 200420014847
Authority: CN
Inventors: 刘德军
Original assignee: Mitac Precision Technology Shunde Ltd
Current assignee: Mitac Precision Technology Shunde Ltd
Priority date: 2004-01-16
Filing date: 2004-01-16
Publication date: 2005-10-19
Anticipated expiration: 2014-01-16

Abstract

The utility model provides an electromagnetic interference preventive spring, comprising a fixed wall surface. One end of the fixed wall surface is provided with a bending-arc shape spring, the fixed wall surface is provided with various fixed structures, such as a reversing hook and a rivet hole, which can meet the fixed mode requirements of different occasions and can combine various fixed structures. And therefore, the spring can be firmly fixed to the sectional casing of an electronic apparatus, besides, the spring is provided with a plurality of arc structures, so the utility model has a favorable elasticity.

Description

Anti-electromagnetic interference shell fragment

Technical field

The utility model relates to electromagnetic interference (EMI) field that prevents, especially about a kind of anti-electromagnetic interference elastic piece structure of applicable various fixed mode.

Background technology

As everyone knows, can generate electromagnetic waves during the electronic building brick running,, then can disturb other electronic installation that passes through electromagnetic wave mode transmission signal to receive the effect of signal, also can cause other electronic product performance to descend if this electromagnetic wave overflows unrestrictedly to external radiation; It is made up of many electronic devices and components computer as electronic installation, and therefore, its when running produces a large amount of electromagnetic interference, and along with the popularizing gradually of electronic installation such as computer, the electronic jamming problem is also more and more serious thereupon.So various countries all strictly regulate the electromagnetic wave of computer institute radiation, made peremptory norm Electromagnetic Compatibility standard as US Federal Communication Committee (Federal Communication Commission).

In the design of electronic installation such as computer, for reaching above-mentioned EMC standard, must be with the electric conducting material housing of sealing electromagnetic shielding in addition, because for ease of the assembling and dismantling electronic installation, its housing all adopts relatively-movable part (as loam cake, support, side plate etc.) to combine mostly, but, engage part at each several part like this and can produce the slit unavoidably and cause electromagnetic wave to leak, be difficult to meet the EMC standard.Studies show that its gap can not surpass 1/20th of signal wavelength if will reach the EMC standard at each part joint such as loam cake and support, and computer housing joint spacing is far longer than this numerical value now.

Be head it off, various methods have appearred in industrial circle, wherein, have with seam between screw locking loam cake and support, but this measure is both impracticable also uneconomical, the most frequently used method is to fix several electroconductive elastic sheets between loam cake and support, electroconductive elastic sheet is electrically contacted with support with loam cake respectively, as Taiwan patent application the 78200940th, No. 84202819 and United States Patent (USP) the 4762966th, No. 4780570 etc., dismounting, during the kludge case lid, shell fragment is easy to generate lateral displacement or slip, so that contacts other electronic devices and components and cause short circuit, even obscission takes place.

In addition, existing electroconductive elastic sheet can only be arranged at the shell rim of electronic installation mostly, and can not be fixed in a certain position in the middle of it, and this obviously can not satisfy the demand of many special application scenarios.

Summary of the invention

At above-described existing existing defective of anti-electromagnetic interference elastic piece structure and demand, the utility model provides a kind of anti-electromagnetic interference shell fragment, it can satisfy the requirement of different occasion fixed forms, and is fixing firm and elastic performance is good, can prevent the electromagnetic interference phenomenon preferably.

The utility model is taked following technical scheme:

This shell fragment includes a fixed wall, offers at least one barb on this fixed wall; One end of this fixed wall is provided with a reed, and this reed is connected with this fixed wall is in an acute angle; Can also on fixed wall, offer at least one rivet hole, and on reed, offer and the corresponding hole of keeping away of above-mentioned rivet hole.

In addition, the utility model also can further be taked following technical scheme:

Be provided with first curved portions of one " U " shape in the said fixing wall part that is connected with reed; Above-mentioned reed is provided with one second curved portions close with the fixed wall connection, and second curved portions is to caving near the fixed wall direction; The end that this reed is not connected with fixed wall, being connected with second curved portions is provided with one the 3rd curved portions; The end margin place that this reed is not connected with fixed wall offers one the 4th curved portions.

Therefore, this anti-electromagnetic interference shell fragment has the various fixed structure, when fixing this shell fragment, can be used in combination the various fixed mode, can obtain constant intensity preferably; In addition, this shell fragment also offers some curved portions structures, makes this shell fragment have better elastic, closely contacts with electronic installation combination housing, obtains anti-preferably electromagnetic interference effect.

Description of drawings

Below with reference to the drawings and specific embodiments anti-electromagnetic interference shell fragment of the present utility model is described in further detail:

Fig. 1 is the three-dimensional structure diagram of the anti-electromagnetic interference shell fragment of the utility model;

Fig. 2 is the end view of the anti-electromagnetic interference shell fragment of the utility model;

Fig. 3 is sticked in fixedly schematic diagram of support edge for the barb of the anti-electromagnetic interference shell fragment of the utility model;

Fig. 4 is sticked in support center fixed schematic diagram for the barb of the anti-electromagnetic interference shell fragment of the utility model;

Fig. 5 is the preceding schematic diagram of the riveted and fixed of the anti-electromagnetic interference shell fragment of the utility model;

Fig. 6 for the riveted and fixed of the anti-electromagnetic interference shell fragment of the utility model after schematic diagram;

Fig. 7 is the fixing schematic diagram of the viscose glue of the anti-electromagnetic interference shell fragment of the utility model;

Fig. 8 prevents that for the utility model three kinds of fixed forms of electromagnetic interference shell fragment are in conjunction with using schematic diagram.

Embodiment

See also Fig. 1 to Fig. 8, disturb the preferred embodiment of shell fragment for the utility model anti-electromagnetic radiation, wherein shell fragment 2 is to be installed between the combination housing of electronic installation, in the present embodiment, this electronic installation is example with the host computer, the utility model has only drawn and has fixed the required support 1 of this shell fragment 2, and its loam cake does not draw.

As shown in Figure 1, be the utility model shell fragment three-dimensional structure diagram, this shell fragment 2 includes a fixed wall 21, these fixed wall 21 its two surfaces all have higher planarization, offer at least one barb 211 on this fixed wall 21, in addition, also can offer at least one rivet hole 212 on this fixed wall 21; One end of this fixed wall 21 is provided with the reed 22 of a curved arc standing shape, and this reed 22 offered on this reed 22 and the above-mentioned rivet hole 212 corresponding hole 221 of keeping away with 21 in an acute angle being connected of said fixing wall.

In addition please in conjunction with Fig. 1, Fig. 2, described reed 22 offers one first curved portions 222 with fixed wall 21 connections, and this first curved portions 222 is bent into one " U " shape structure, so that sufficient elastic force to be provided; This reed 22 is being provided with one second curved portions 223 near joining with fixed wall 21 connections, with above-mentioned first curved portions 222, and this second curved portions 223 is to the direction depression near fixed wall 21; The end that described reed 22 is not connected with fixed wall 21 is provided with one the 3rd curved portions 224, and the 3rd curved portions 224 is protruded to the direction away from said fixing wall 21; In addition, the end margin place that described reed 22 is not connected with fixed wall 21 offers one the 4th curved portions 225, and the 4th curved portions 225 is near the direction of fixed wall 21 depression, so that the end of this reed 22 is to away from the direction of this fixed wall 21 warpage a little.

As shown in Figure 3, Figure 4, for only utilizing its barb 211, this shell fragment 2 is sticked in fixedly situation on the support 1, as Fig. 3, in the present embodiment, this barb 211 is to be formed to a side blow system that offers reed 22 by fixed wall 21, when desire is fixed in support 1 edge with shell fragment 2, only need support 1 edge is placed in this fixed wall 21 and the reed 22 formed accommodation spaces, make second curved portions, 223 pressure-contacting seats, 1 surface of this shell fragment 2, and make barb 211 place the blocked hole 11 interior and engagings with it of support 1, this shell fragment 2 can be securely fixed on the support 1; Equally, as Fig. 4, when desire is fixed in support 1 centre position with shell fragment 2, make the fixed wall 21 of this shell fragment 2 pass a blocked hole 11 of support 1, and make support 1 place in fixed wall 21 and the reed 22 formed accommodation spaces, make barb 211 engage and get final product with another blocked hole 11.

Hence one can see that, and the mode that above-mentioned shell fragment 2 adopts barb 211 to be fixed not only can be fixed on support 1 edge neatly, also can be fixed in its middle position.

As Fig. 5, shown in Figure 6, for only adopting the riveted joint mode, this shell fragment 2 is fixed in the situation of support 1, as Fig. 5, before the riveted joint, the prominent point 12 of riveted joint on the support 1 is placed in the rivet hole 212 of this shell fragment 2, after punching press, as Fig. 6, this shell fragment 2 can be one with this support 1 riveted joint.In above-mentioned riveted joint process, the drift of the required use of punching press (figure do not show) can be passed and carried out punching press by the hole 221 (as Fig. 1) of keeping away of shell fragment 2.

As shown in Figure 7, for only adopting the viscose glue mode, this shell fragment 2 is fixed in the situation of support 1, because fixed wall 21 its two surfaces of shell fragment 2 all keep planarization preferably, die behind the colloids such as can smearing seccotine in the one side that this fixed wall 21 contacts with support 1, the surface that this face is bonded in support 1 gets final product.

What deserves to be explained is, this kind mode of being adhesively fixed can be used in conjunction with above-mentioned barb engaging, two kinds of fixed forms of riveted joint respectively simultaneously, thereby, the occasion that specific (special) requirements is arranged for the shell fragment constant intensity, then can use above-mentioned three kinds of fixed forms simultaneously, as shown in Figure 8, at this moment, the barb 211 of this shell fragment 2 is to be formed to a side blow system of not offering reed 22 by its fixed wall 21.

As shown in Figure 1, offer some holes 221 of keeping away on the reed 22 of shell fragment 2, these keep away a hole 221 except that having above-mentioned effect of passing for drift, can also make shell fragment 2 obtain different elastic performances by adjusting the size that this keeps away a hole 221.

As shown in Figure 2, the utility model comparatively significantly improves the reed 22 that also is this shell fragment 2 and has some aforesaid curved portions structures, and 222 one-tenth " U " shapes of first curved portions structure is for shell fragment 2 provides sufficient elastic force; Second curved portions 223 is near the direction of fixed wall 21 depression, tightly the surface of pressure-contacting seat 1 (as Fig. 3, Fig. 4), make between shell fragment 2 and this support 1 fix more fastening; The 3rd curved portions 224 is protruded to the direction away from said fixing wall 21, and after shell fragment 2 was fixed, loam cake (scheming not shown) can be pressed when touching the 3rd curved portions 224 when cooperating with support 1, and the 3rd curved portions 224 can provide an extension elastic force; The 4th curved portions 225 its direction depressions to close fixed wall 21, so that reed 22 ends are to away from the direction of this fixed wall 21 warpage a little, loam cake (scheming not shown) can prevent reed 22 terminal the contacts with support 1 and scratch support 1 of shell fragment 2 when cooperating with support 1.

According to the above, adopt anti-electromagnetic interference shell fragment of the present utility model, because it has the various fixed structure, in the time of fixedly, can be used in combination the various fixed mode, can obtain constant intensity preferably; This shell fragment also offers some curved portions structures, makes this shell fragment have better elastic, closely contacts with electronic installation combination housing, obtains anti-preferably electromagnetic interference effect.

Claims

1, a kind of anti-electromagnetic interference shell fragment, it is positioned on the combination housing of electronic installation, it is characterized in that: this shell fragment includes a fixed wall, offers at least one barb on this fixed wall, offers at least one rivet hole on this fixed wall; One end of this fixed wall is provided with a reed, and this reed is connected with this fixed wall is in an acute angle, and offers on this reed and the corresponding hole of keeping away of above-mentioned rivet hole.

2, anti-electromagnetic interference shell fragment according to claim 1 is characterized in that: the described fixed wall part that is connected with reed is provided with one first curved portions.

3, anti-electromagnetic interference shell fragment according to claim 2 is characterized in that: described first curved portions is bent into one " U " shape structure.

4, anti-electromagnetic interference shell fragment according to claim 1 is characterized in that: described reed is provided with one second curved portions close with the fixed wall connection.

5, anti-electromagnetic interference shell fragment according to claim 4 is characterized in that: described second curved portions is to caving near the fixed wall direction.

6, anti-electromagnetic interference shell fragment according to claim 1 is characterized in that: the described reed end that one of is not connected with fixed wall is provided with one the 3rd curved portions.

7, anti-electromagnetic interference shell fragment according to claim 6 is characterized in that: described the 3rd curved portions is to protruding away from said fixing wall direction.

8, anti-electromagnetic interference shell fragment according to claim 1 is characterized in that: the end margin place that described reed is not connected with fixed wall offers one the 4th curved portions.

9, anti-electromagnetic interference shell fragment according to claim 8 is characterized in that: described the 4th curved portions is to caving near the fixed wall direction.

10, anti-electromagnetic interference shell fragment according to claim 1 is characterized in that: described reed end is to away from the direction of this fixed wall warpage a little.