CN101242735A

CN101242735A - A clip for fixing of shield can

Info

Publication number: CN101242735A
Application number: CNA2008100830416A
Authority: CN
Inventors: 郑乐焕
Original assignee: Pocons Co Ltd
Current assignee: Pocons Co Ltd
Priority date: 2007-11-01
Filing date: 2008-03-18
Publication date: 2008-08-13
Anticipated expiration: 2028-03-18
Also published as: CN101242735B; KR20080006506A; JP2011501477A; KR100886591B1; JP5161970B2; WO2009057855A1

Abstract

The present invention provides an attaching clamp of a shielding cover. The aim of the invention is to provide the attaching clamp of the shielding cover capable of credibly fixing on the printed circuit board without reducing the use space of the PCB and the holding force of the shielding cover. According to the invention, the attaching clamp of the shielding cover fixes the shielding cover on the PCB, the shielding cover is used for covering the electronic part mounted on the PCB, the attaching clamp of the shielding cover includes: multiple first fixing units fixedly contacted with the PCB; a second fixing unit collocated between the first fixing units and fixedly contacted with the PCB; an extending unit formed by each border of the second fixing unit bending upwards and outwards, and partitioned with the PCB; an inclined connection unit connecting the extending unit with the fist fixing units; a pair of elastic pieces vertically formed on the extending unit, the elastic pieces is mutually opposite to clamp the side wall of the shielding cover.

Description

Be used for the fixing folder of radome

Technical field

The present invention relates to a kind of radome geometrical clamp, and particularly can be fixed to the radome geometrical clamp on the printed circuit board (PCB) (PCB) more reliably, geometrical clamp can not reduce usage space and its chucking power with respect to radome of PCB.

Background technology

Usually, electromagnetic wave is very helpful in some fields, for example in radio communication and radar.Yet electromagnetic wave may influence the operation of electronic equipment.This phenomenon is called as " electromagnetic interference (EMI) ", and it not only produces the noise for electronic equipment, and harmful.

Therefore, recently, electronic unit (for example being installed in the semiconductor device on the printed circuit board (PCB) (PCB) of electronic equipment internal) conductively-closed cover covers, and cutting off the electromagnetic interference that is produced by electronic unit, and prevents from the equipment itself that comprises electronic unit and other electronic equipment are on every side exerted an influence.This radome is box-shaped normally, is opened with the overlay electronic parts below it.

And radome is installed in PCB by the folder that is connected to PCB usually and goes up to clamp the sidewall of radome.

Fig. 1 shows the structure that is used for fixing the folder of radome according to conventional art to Fig. 3.

To shown in Figure 3, conventional radome geometrical clamp 1 is arranged on the PCB3 around electronic unit with respect to respective numbers and the position ring of each sidewall 2a of radome 2 as Fig. 1.Radome geometrical clamp 1 comprises: a plurality of fixed cells 4 that fixedly contact with PCB3; A plurality of be formed between the respective fixation unit 4, with the isolated base unit 5 of PCB3; A plurality of paired flexure strips 6, every pair of both sides from each base unit 5 extend upward, with the form of clip mutually in the face of sidewall with clamping radome 2.

Fixed cell 4 is connected on the PCB3 by welding its profile.Each flexure strip 6 thereon the mid portion between the lower part to center curvature, so that mid portion protrudes to the sidewall 2a that inserts between a pair of flexure strip 6.

Here, PCB3 and base unit 5 isolated reasons are, prevent that when fixed cell 4 is welded on the PCB3 scolding tin from flowing to base unit 5.More particularly, if scolding tin flows to flexure strip 6 and hardening on flexure strip 6 along base unit 5, the elastic force of flexure strip 6 may reduce, and correspondingly reduces the chucking power of radome 2.Therefore, base unit 5 is preferably spaced apart to prevent the reduction of radome 2 chucking powers from PCB3.

Therefore, folder 1 is fixed on state on the PCB3 by fixed cell 4 under, when the sidewall 2a of radome 2 inserts between a pair of flexure strip 6 of folder 1, because the outside of sidewall 2a and inner surface are clamped by the paired flexure strip 6 that is formed on base unit 5 both sides, radome 2 can be fixed on the folder 1.

In addition, when the electronic unit that covers when radome 2 need be changed, in this case, separately can the finishing easily of radome 2.By pull-up radome 2 simply, the respective side walls 2a of radome 2 can take away from pressing from both sides between 1 the flexure strip 6.

Summary of the invention

Technical problem

Yet in the routine of the said structure that is used for fixing radome 2 folder 1, base unit 5 separates fully with PCB3, and the fixed cell 4 that is welded to PCB3 has relatively little area.Therefore, adhesion deficiency between folder 1 and the PCB3 is to such an extent as to folder 1 may leave with the PCB3 branch when using electronic unit.

For example, on the folder 1 that is welded on the PCB3, if flexure strip 6 departs from the tram a little with respect to the sidewall 2a of radome 2, when the sidewall 2a of radome 2 is clamped by flexure strip 6, flexure strip 6 may be twisted, and therefore may separate from PCB3 with flexure strip 6 integrally formed fixed cells 4.

In addition, may be used for vibratory equipment because press from both sides 1, for example air-conditioning or refrigeration machine, if the adhesion deficiency between fixed cell 4 and the PCB3, because the vibration or the impact that produce during the electronic equipment operation, fixed cell 4 may separate from PCB3.

In order to prevent this situation, preferably,, increase the adhesion between PCB3 and the fixed cell 4 by enlarging the surface area of fixed cell 4.Yet in this case, folder 1 will occupy too many area on PCB3, thereby reduce the usage space of PCB3.

Solution

Therefore, finish the present invention in view of the above problems, the objective of the invention is to, the radome geometrical clamp that can be fixed to more reliably on the PCB is provided, this folder can not cause the reduction of PCB usage space can't reduce its chucking power for radome.

Beneficial effect

Radome geometrical clamp according to the present invention has second fixed cell, auxiliary fixed cell and bending unit.Therefore, although compare with routine folder, folder is actual not to account for too many area on PCB, can increase the surface area of the folder that is used to be welded to PCB.Correspondingly, can not cause the reduction of PCB usage space, can improve the adhesion between folder and the PCB well.

Description of drawings

Above-mentioned and other purpose of the present invention, feature and advantage will will more be expressly understood from following detailed description together with accompanying drawing, wherein:

Fig. 1 shows the perspective view of conventional radome fixed folder structure;

Fig. 2 shows the profile of shield sidewall by conventional radome geometrical clamp jam;

Fig. 3 shows the end view of shield sidewall by conventional radome geometrical clamp jam;

Fig. 4 shows the perspective view according to the radome fixed folder structure of the embodiment of the invention;

Fig. 5 shows the profile according to the radome geometrical clamp of the embodiment of the invention;

Fig. 6 shows a plurality of perspective views that are fixed on the situation on the PCB according to the radome geometrical clamp of the embodiment of the invention;

Fig. 7 show be fixed on the PCB, according to the plane graph of the radome geometrical clamp of the embodiment of the invention;

Fig. 8 show be fixed on the PCB, according to the end view of the radome geometrical clamp of the embodiment of the invention;

Fig. 9 shows the profile of the state before being clamped shield sidewall by the radome geometrical clamp according to the embodiment of the invention;

Figure 10 shows the profile that is clamped the state of shield sidewall according to the radome geometrical clamp of the embodiment of the invention; With

Figure 11 shows the profile of the state after being clamped shield sidewall by the radome geometrical clamp according to the embodiment of the invention.

Embodiment

According to an aspect of the present invention, above-mentioned and other purpose can realize by the radome geometrical clamp that radome is fixed on the printed circuit board (PCB) (PCB) is provided, described radome is used for covering the electronic unit that is installed on the PCB, and described radome geometrical clamp comprises: a plurality of first fixed cells that fixedly contact with PCB; Second fixed cell that is arranged between first fixed cell and fixedly contacts with PCB; From each limit of second fixed cell upwardly and outwardly crimp form, with the isolated extension apparatus of PCB; The linkage unit of the inclination that extension apparatus and first fixed cell are coupled together; With a pair of flexure strip that vertically forms at the extension apparatus place, flexure strip is mutually in the face of the sidewall with the clamping radome.

First and second fixed cells are fixed on the PCB by welding its profile.

One of them of first fixed cell is arranged in the centre of radome geometrical clamp length direction, the both sides of first fixed cell of described centre weight and in shape the symmetry, and an auxiliary fixed cell extends from a side of first fixed cell of the described centre length direction perpendicular to the radome geometrical clamp.

The length that auxiliary fixed cell extends is less than the whole width of first fixed cell of described centre, and greater than half of the width of first fixed cell of described centre.

In three first fixed cells at least one further is provided with at least one and is formed on bending unit on its profile, so that increase the welding region of first fixed cell.

Bending unit forms by recessed first fixed cell of cutting, and does not increase the contact area between first fixed cell and the PCB so that only increase the profile length of first fixed cell.

Bending unit forms being arranged on first fixed cell of radome geometrical clamp with respect to place, the two ends of length direction.

Hereinafter, will write up the typical embodiment of the present invention with reference to the accompanying drawings.

Fig. 6 shows the part of the PCB structure of the radome geometrical clamp of using the embodiment of the invention.As shown in Figure 6, the electronic unit 20 that comprises semiconductor device is installed on the PCB10.Around the outside of electronic unit 20 radome 30 is installed and is also therefore cut off the electromagnetic interference of electronic unit 20 with overlay electronic parts 20.

Radome 30 is installed on the PCB10 removedly, that is to say, can be easily fixed to PCB and upward and from PCB separate.This fixing of radome 30 can be realized by the radome geometrical clamp 40 according to the embodiment of the invention with separating.

Radome 30 is cube box-shapeds, has integrally formed four sidewalls 31 and roof 32 and lower open, so that by electronic unit 20 is contained in wherein and overlay electronic parts 20.Radome 30 can be made to cut off electromagnetic wave effectively with tin plate.

A plurality of radome geometrical clamps 40 are installed on the PCB10 around electronic unit 20, with the fixed mask cover 30 removedly of the bottom by clamping radome 30 each sidewall 31.Radome geometrical clamp 40 can be arranged on PCB10 and the radome 30 sidewalls 31 corresponding positions, and also corresponding with the quantity of sidewall 31.In addition, sidewall 31 can comprise step slot 31a (it is actually the part that is clamped by radome geometrical clamp 40) in the middle of its lower end, when clamping, do not produce any slit at PCB10 with near between the lower end, sidewall 31 both sides of step slot 31a with convenient sidewall 31 conductively-closed cover geometrical clamps 40.

With reference to Figure 4 and 5, radome geometrical clamp 40 comprises: three first fixed cells 41 of spaced apart setting alongst and 42; Second fixed cell 43 that is arranged between corresponding first

fixed cell

41 and 42 and fixedly contacts with PCB10; The extension apparatus 43a that forms of crimp upwardly and outwardly from second fixed cell, 43 both sides; Linkage unit 46, linkage unit 46 has the form of inclination, so that extension apparatus 43a is connected to first

fixed cell

41 and 42 that contacts with PCB10; With a pair of

flexure strip

44 and 45 that vertically forms in each outer edge of extension apparatus 43a, described

flexure strip

44 and 45 is faced mutually, so that clamp the sidewall 31 of radome 30.First and second

fixed cells

41,42 and 43 are fixed on the PCB10 by welding its profile.

For the radome geometrical clamp 40 that uses said structure is fixed to radome 30 on the PCB10, by welding first and second

fixed cells

41,42 and 43 in the position corresponding with the respective side walls 31 of radome 30, radome geometrical clamp 40 at first is fixed on the PCB10.

According to embodiments of the invention, owing to there is second fixed cell 43, the welding region of radome geometrical clamp 40 can enlarge.Therefore, radome geometrical clamp 40 can be fixed on the PCB10 more reliably.Yet in addition, compared with the radome geometrical clamp of routine, because second fixed cell 43, radome geometrical clamp 40 does not take too many zone on PCB10.

If flow on

flexure strip

44 and 45 at welding first and second

fixed cells

41,42 and 43 o'clock scolding tin, then

flexure strip

44 and 45 elasticity can reduce, and correspondingly reduce

flexure strip

44 and 45 chucking powers with respect to the sidewall 31 of radome 30.Yet, in such an embodiment, owing to have linkage unit 46 and extension apparatus 43a, ratio first and second fixed cells 41 that

flexure strip

44 and 45 is arranged, 42 and 43 is high and therefore spaced apart with PCB10, when the profile of first and second fixed

cells

41,42 and 43 is welded on the PCB10, can prevent that scolding tin from flowing to flexure strip 44 and 45.Therefore, improved the fixed effect of radome geometrical clamp 40, can prevent that the elasticity of

flexure strip

44 and 45 from reducing for PCB10.In addition, can prevent that also

flexure strip

44 and 45 chucking powers with respect to radome 30 sidewalls 31 from reducing.

Here, second fixed cell 43 and extension apparatus 43a can make by dull and stereotyped inner the distortion to center pressure simply, and inside will be second fixed cell 43.

Radome geometrical clamp 40 moves by the vacuum pick of the nozzle (not shown) of semiconductor fabrication (SMT) equipment (not shown), so that be installed on the PCB10.Here, form the vacuum pick face because be arranged in first fixed cell 42 of the centre among three first

fixed cells

41 and 42 with respect to the nozzle (not shown), preferably the both sides of Zhong Jian first fixed cell 42 are in weight and symmetry in shape, thus radome geometrical clamp 40 any laterally inclined to by nozzle (not shown) vacuum pick not.

As mentioned above, the upper surface of first fixed cell 42 of the centre among three first

fixed cells

41 and 42 forms the vacuum pick face.To this, in such an embodiment, a side of first fixed cell 42 in the middle of auxiliary fixed cell 42a is formed on is perpendicular to the length direction extension of radome geometrical clamp 40, the width of first fixed cell 42 in the middle of having increased thus.

Owing to there is auxiliary fixed cell 42a, the first middle fixed cell 42 can further increase with the contact-making surface of PCB10.Correspondingly, the adhesion between radome geometrical clamp 40 and PCB10 can be improved well.In the accompanying drawings, draw dotted line so that limit auxiliary fixed cell 42a from first fixed cell 42 difference of centre.

Because auxiliary fixed cell 42a and the radome geometrical clamp 40 that in fact increases and the contact area between the PCB10, when radome geometrical clamp 40 was installed in PCB10 and goes up, auxiliary fixed cell 42a preferably pointed to electronic unit 20, as shown in Figure 6 in order to prevent.Therefore, when radome 30 was installed, auxiliary fixed cell 42a was arranged in radome 30 inside, does not influence the usage space of PCB10.

Under the situation about increasing owing to auxiliary fixed cell 42a in the zone of first fixed cell 42 of centre, the nozzle (not shown) can more easily be finished the vacuum pick of radome geometrical clamp 40, and does not interfere with

flexure strip

44 and 45.

Preferably, the length that auxiliary fixed cell 42a extends is less than the whole width of first fixed cell 42 of centre and greater than half of the width of first fixed cell 42 of centre, the vacuum pick of nozzle (not shown) can be finished smoothly thus, does not interfere between auxiliary fixed cell 42a and electronic unit 20.

In addition, in radome geometrical clamp 40 according to the embodiment of the invention, three first

fixed cells

41 and 42 at least one at least one bending unit 41a further is set on its profile so that increase the welding region of first

fixed cell

41 and 42.

For example, preferably, form bending unit 41a by recessed first

fixed cell

41 and 42 of cutting do not increase so that only increase the profile length of first fixed cell first

fixed cell

41 and 42 and PCB10 between contact area.

Although bending unit 41a can be formed on all three first

fixed cells

41 and 42, preferably only on two fixed cells 41 arranging with respect to the two ends of radome geometrical clamp 40 length directions, provide bending unit 4, so that make the technology of radome geometrical clamp 40 be unlikely to too complicated.According to present embodiment, first

fixed cell

41 and 42 each all have rectangular in form, and bending unit 41a only is formed on the distolateral of first fixed cell 41 that is arranged in radome geometrical clamp 40 two ends.In Figure 11, reference numbers " A " expression is welded to the welding region of the radome geometrical clamp 40 of PCB10 at Fig. 7.

As mentioned above, along with bending unit 41a, second fixed cell 43 and auxiliary fixed cell 42a are provided, although in fact radome geometrical clamp 40 region occupied on PCB10 is compared with conventional art do not roll up, radome geometrical clamp 40 has increased with respect to the welding region of PCB10.Therefore, can improve the adhesion between radome geometrical clamp 40 and the PCB10 well, and can not cause the reduction of PCB10 usage space.

Under radome geometrical clamp 40 was fixed on state on the PCB10, the respective side walls 31 of radome 30 was inserted between the radome geometrical clamp 40 corresponding a pair of flexure strips 44 and 45.By this, radome 30 is clamped by the flexure strip 44 of each radome

geometrical clamp

40 and 45, so its sidewall 31 is fixed on the PCB10 easily.

When needing to change electronic unit 20 in this state, can remove radome 30 simply.Only by upwards drawing radome 30, just can be from taking out the sidewall 31 of radome 30 between the

flexure strip

44 and 45 of corresponding radome geometrical clamp 40.

If the

flexure strip

44 and 45 of radome geometrical clamp 40 clamps sidewall 31 more firmly, then improved the chucking power of radome geometrical clamp 40.Therefore, although some impacts or vibration are applied on the PCB10, radome geometrical clamp 40 can firmly be fixed on PCB10 and go up and do not shake.For this purpose, be configured to clamping sidewall 31 more firmly according to the

flexure strip

44 and 45 of the embodiment of the invention.

More particularly, curve inwardly with respect to vertical direction by mid portion corresponding

flexure strip

44 and 45, so that mid portion protrudes to the sidewalls 31 that are inserted in the middle of

flexure strip

44 and 45, thereby form the

first nipper units

44a and 45a to clamp sidewall 13 more forcefully.

Therefore, the surfaces externally and internally that is inserted into the sidewall 31 between

flexure strip

44 and 45 is flexibly pushed, and fixes by the first nipper units 44a and 45a.Here, the interval that forms between the

flexure strip

44 and 45 that is higher than the

first nipper units

44a and 45a, and dwindles downwards greater than the thickness of sidewall 31 gradually on top, so that guiding sidewall 31 is inserted between

flexure strip

44 and 45.

In the bottom of the

first nipper units

44a and 45a, by forming second nipper units 44b and the 45b, so that push sidewall 31 with the

first nipper units

44a and 45a at

flexure strip

44 and 45 middle cuttings with respect to radome geometrical clamp 40 length directions.

The

second nipper units

44b and 45b comprise fixed part 44b1 and 45b1 and free end 44b2 and 45b2.The

second nipper units

44b and 45b are by forming along the profile cut flexure strip except stiff end 44b1 and 4,5b1 44 and 45, and fixed part 44b1 and 45b1 are fixed on the first nipper units 44a and the 45a thus.After the cutting, free end 44b2 and 45b2 curve inwardly and are disposed in the space between flexure strip 44 and 45.The

second nipper units

44b and 45b slope downwardly into and are arranged in 44b2 of lower free end portion and 45b2 from being fixed to fixed part 44b1 on the first nipper units 44a and the 45a and 45b1, and the interval between free end 44b2 and the 45b2 is less than the interval between the first nipper units 44a and the 45a thus.

Fig. 9 shows the insertion process of sidewall 31 between

flexure strip

44 and 45 to Figure 11.With reference to Figure 10, show when the

first nipper units

44a and 45a when direction of arrow B widens, sidewall 31 inserts between the first nipper units 44a and the 45a, along with sidewall 31 inserts between the first nipper units 44a and the 45a, free end 44b2 and the 45b2 of the

second nipper units

44b and 45b are forced to contact with each other along direction of arrow C.When sidewall 31 inserted between the second nipper units 44b and the 45b more and more, sidewall 31 was firmly clamped by the

first nipper units

44a and 45a and the

second nipper units

44b and 45b, as shown in figure 11.

And, utilization comprises the first and

second nipper units

44a, 45a, the said structure of 44b and 45b, although when using radome geometrical clamp 40, the thickness greater than sidewall 31 is expanded at interval between the first nipper units 44a and the 45a to, and therefore can not clamp sidewall 31, but free end portion 44b2 and the 45b2 of the

second nipper units

44b and 45b can remain on deflated state.Therefore, sidewall 31 can keep clamping by the

second nipper units

44b and 45b.

Although for illustrative purpose, optimal case of the present invention is open, and those skilled in the art it will be understood that the various distortion that do not break away from the disclosed scope of the invention of claims and spirit, and it is possible increasing and replacing.

Claims

1, a kind of radome is fixed to radome geometrical clamp on the printed circuit board (PCB) (PCB), described radome is used for covering the electronic unit that is installed on the PCB, and described radome geometrical clamp comprises:

A plurality of first fixed cells that fixedly contact with PCB;

Second fixed cell that is arranged between first fixed cell and fixedly contacts with PCB;

From each limit of second fixed cell upwardly and outwardly crimp form, with the isolated extension apparatus of PCB;

The linkage unit of the inclination that extension apparatus and first fixed cell are coupled together; With

The a pair of flexure strip that vertically forms at the extension apparatus place, flexure strip are mutually in the face of the sidewall with the clamping radome.

2, according to the radome geometrical clamp of claim 1, wherein, first and second fixed cells are fixed on the PCB by welding its profile.

3, according to the radome geometrical clamp of claim 1, wherein, one of them of first fixed cell is arranged in the centre of radome geometrical clamp length direction, the both sides of first fixed cell of described centre weight and in shape the symmetry, and an auxiliary fixed cell extends from a side of first fixed cell of the described centre length direction perpendicular to the radome geometrical clamp.

4, according to the radome geometrical clamp of claim 3, wherein, the length that described auxiliary fixed cell extends is less than the whole width of first fixed cell of described centre, and greater than half of the width of first fixed cell of described centre.

5, according to the radome geometrical clamp of claim 2, wherein, at least one of three first fixed cells also has at least one bending unit that is formed on its profile, so that increase the welding region of first fixed cell.

6, according to the radome geometrical clamp of claim 5, wherein, bending unit forms by recessed first fixed cell of cutting, and does not increase the contact area between first fixed cell and the PCB so that only increase the profile length of first fixed cell.

7, according to the radome geometrical clamp of claim 6, wherein, bending unit forms being arranged on first fixed cell of radome geometrical clamp with respect to the place, two ends of length direction.