CN202104001U

CN202104001U - Fixing clamp

Info

Publication number: CN202104001U
Application number: CN2011200392141U
Authority: CN
Inventors: 彭建民
Original assignee: Lotes Guangzhou Co Ltd
Current assignee: Lotes Guangzhou Co Ltd
Priority date: 2011-02-14
Filing date: 2011-02-14
Publication date: 2012-01-04
Anticipated expiration: 2021-02-14

Abstract

A fixing clamp used for fixing a shield cover to a circuit board comprises at least a substrate, at least two fixing boards and at least two side boards. The two fixing boards are welded to the circuit board and positioned on two sides of the substrate which is connected with the two fixing boards. Two opposite ends of the substrate are respectively bent vertically upwards to form the two side boards, two opposite sides of each side board are respectively bent to form a spring sheet, the spring sheet extends toward the other side board, an insertion space used for holding the shield cover is formed between each of the two side boards and each of the spring sheets, and a gap is formed between each of the spring sheets and the adjacent fixing board. Due to the fact that two opposite side ends of each side board is bent and extends to form each spring sheet relative to the other side board, namely the spring sheets are all arranged on the lateral sides of the side boards, elastic ductility of the spring sheets is not limited by height, and the fixing clamp is favorable for flat-panel design of products.

Description

Geometrical clamp

[technical field]

The utility model relates to a kind of geometrical clamp, refers to especially a kind of a screening cover is fixed to the geometrical clamp on the circuit board.

[background technology]

Usually, in some electronic equipment or electronic unit, all exist some to send electromagnetic electronic component easily, often many electronic components receive electromagnetic interference then can not normal operation, also exists some can send the electronic devices and components of radiation injury human body.Therefore, need screening cover be fixed on the matrix (being circuit board) of electronic devices and components usually, be capped the electromagnetic transmission passage that forms between the electronic devices and components and the external world, eliminate electromagnetic adverse effect with cut-out.

For electronic devices and components long or that often need change in some useful lifes; Just require screening cover to take out from circuit board; So that maintenance and replacing; Wherein a kind of method be exactly mode through a geometrical clamp is set between circuit board and screening cover so that screening cover is fixed to circuit board, can realize the electronic devices and components in the screening cover are shielded the release external interference on the one hand, on the other hand; When needing repairing or change the electronic devices and components in the screening cover, only need screening cover taken out in the geometrical clamp and get final product.

The common a kind of geometrical clamp of industry; Comprise a plurality of substrates and a plurality of fixed head; Each said substrate connects adjacent two said fixed heads, and said fixed head is used for said geometrical clamp is fixed to said circuit board, bends straight up respectively from the relative two sides of each said substrate and extends side plate; The end face of each said side plate upwards is bent to form a shell fragment; Extend the two said shell fragments that form in same said substrate and bend in opposite directions, and form one between relative said two shell fragments and plug the space and be provided with plugging said screening cover, and be arranged with a breach between each said shell fragment and the adjacent said fixed head.

In the prior art,, also there is following problem simultaneously though this kind structure can realize the electronic devices and components that are arranged in said screening cover are shielded:

1. said shell fragment bends straight up from said substrate and forms, and its elasticity extension can receive the restriction of height, is unfavorable for the panelized design of product;

2. said shell fragment bends straight up from said substrate and forms, and the chucking power that relative said two shell fragments impose on said screening cover is vertical with the direction that said screening cover takes out, and promptly said shell fragment and said screening cover amount of interference are very big, not easy-offtaking;

3. be arranged with between each said shell fragment and the adjacent said fixed head and form said breach; When using tin cream that said fixed head is fixed on the said circuit board; Be easy to generate and climb the tin phenomenon; And said tin cream can be climb along said breach and is piled up in said shell fragment place, thereby causes said screening cover firmly not to be held in the said geometrical clamp.

Therefore, be necessary to design a kind of new geometrical clamp, to overcome above-mentioned defective.

[utility model content]

The creation purpose of the utility model is to provide a kind of geometrical clamp that is beneficial to the panelized design and makes things convenient for screening cover to pick and place.

In order to achieve the above object, the utility model geometrical clamp adopts following technical scheme:

A kind of geometrical clamp is used for a screening cover is fixed to a circuit board, comprises at least one substrate; At least two fixed heads are welded on the said circuit board, and said two fixed heads are positioned at the both sides of said substrate, and said substrate connects said two fixed heads; At least two side plates; The two ends relative from said substrate upwards vertically are bent to form respectively; The both sides that each said side plate is relative are bent to form a shell fragment respectively; Said shell fragment extends towards another said side plate, forms one between two said side plates and its each said shell fragment and plugs the space and be used for ccontaining said screening cover, formation one space between each said shell fragment and the adjacent said fixed head.

Compared with prior art, the utility model stationary fixture has following improvement:

1. because said shell fragment forms by relative another the said side plate bending extension of two relative sides of a said side plate, and promptly said shell fragment all is arranged at the side direction of said side plate, the extension of the elasticity of said shell fragment does not receive limitation in height thus, is beneficial to the design of product panelized;

2. owing to extending by relative another the said side plate bending of two relative sides of a said side plate, said shell fragment forms; When the said screening cover of said shell fragment clamping; The chucking power that said shell fragment imposes on said screening cover tilts with the direction that picks and places said screening cover; Its part decomposing force is identical with the direction that picks and places said screening cover, conveniently picks and places;

3. owing to form the below that a space is positioned at said shell fragment between each said shell fragment and the adjacent said fixed head; When using tin cream when being welded in said geometrical clamp on the said circuit board; Because the existence in said space; Said tin cream can not be climbed up said shell fragment, and therefore having avoided climbing the tin phenomenon influences the problem that said screening cover firmly covers.

[description of drawings]

Three-dimensional exploded view when Fig. 1 does not cover for the utility model geometrical clamp;

The three-dimensional exploded view of another angle when Fig. 2 does not cover for the utility model geometrical clamp;

Fig. 3 is the structural representation of the utility model geometrical clamp;

Fig. 4 is the lateral plan of the utility model geometrical clamp;

Fig. 5 is the vertical view of the utility model geometrical clamp;

Fig. 6 is the cross section view of the utility model geometrical clamp after covering;

Fig. 7 is the side sectional view of the utility model geometrical clamp after covering.

The drawing reference numeral explanation of embodiment:

Geometrical clamp 1 screening cover 2 circuit boards 3 electronic units 4

Fixed head 11 substrates 12

First side plate, 121 second side plates 122

First shell fragment, 201 second shell fragments 202 the 3rd shell fragment 203 the 4th shell fragment 204

First shell fragment to 100 second shell fragments to 200

123 inclined-planes 125, space

Plug space 126 breach 127

Sidewall 21 end faces 22 grooves 23

[embodiment]

Purpose, structure, characteristic and effect etc. for ease of better understanding the utility model combine accompanying drawing and embodiment that the utility model geometrical clamp is described further at present.

Please see figures.1.and.2, be the geometrical clamp 1 of the utility model, be used for a screening cover 2 is positioned to a circuit board 3, with overlay electronic parts 4 and cut off electronic unit 4 and extraneous electromagnetic interference.

Please see figures.1.and.2, said screening cover 2 is installed on the said circuit board 3 through said geometrical clamp 1, and said screening cover 2 can separate from said circuit board 3 easily.

Please see figures.1.and.2, said screening cover 2 is processed by tin plate, and said screening cover 2 has integrated four sidewalls 21 and an end face 22, in order to cover said electronic unit 4; Said sidewall 21 can be installed on the said geometrical clamp 1 that is positioned at its below; And each said sidewall 21 is arranged with a groove 23; Said groove 23 is stepped; So that when said sidewall 21 is clamped by said geometrical clamp 1, between said circuit board 3, said geometrical clamp 1 and said sidewall 21, do not produce any slit.

Please with reference to Fig. 3, Fig. 4 and Fig. 5; Said geometrical clamp 1 comprises three fixed heads 11; And the substrate 12 between per two adjacent said fixed heads 11, said fixed head 11 is used for said geometrical clamp 1 is fixed to said circuit board 3 through welding manner, and each said substrate 12 connects adjacent said two fixed heads 11; And said substrate 12 is positioned at same plane with said fixed head 11, and said substrate 12 and said fixed head 11 all are located at the upper surface of said circuit board 3.

Please with reference to Fig. 3, Fig. 4 and Fig. 5; Upwards vertically be bent to form one first side plate 121 and one second side plate 122 respectively from said substrate 12 relative two ends; Said first side plate 121 relative both sides are bent to form one first shell fragment 201 and one second shell fragment 202 respectively; Said first shell fragment 201 extends towards said second side plate 122 with said second shell fragment 202; And said first shell fragment 201 and the longitudinal axis symmetry of said second shell fragment 202 about said first side plate 121; So that said first shell fragment 201 all keeps balance with said second shell fragment 202 on structure and weight; Thereby can make said screening cover 2 smooth being covered on the said circuit board 3 smoothly, and said first shell fragment 201 all is the angle setting with said first side plate 121 with said second shell fragment 202, to increase the elastic strength of said first shell fragment 201 and said second shell fragment 202; Said second side plate 122 relative both sides are bent to form one the 3rd shell fragment 203 and one the 4th shell fragment 204 respectively; Said the 3rd shell fragment 203 extends towards said first side plate 121 with said the 4th shell fragment 204; And said the 3rd shell fragment 203 and the longitudinal axis symmetry of said the 4th shell fragment 204 about said second side plate 122; So that said the 3rd shell fragment 203 all keeps balance with said the 4th shell fragment 204 on structure and weight; Thereby can make smooth being covered on the said circuit board 3 smoothly of said screening cover 2; And said the 3rd shell fragment 203 all is the angle setting with said second side plate 122 with said the 4th shell fragment 204, to increase the elastic strength of said the 3rd shell fragment 203 and said the 4th shell fragment 204; And said first shell fragment 201 bends with said the 3rd shell fragment 203 in opposite directions and about said substrate 12 symmetries; Said first shell fragment 201 constitutes one first shell fragment to 100 with said the 3rd shell fragment 203; Said second shell fragment 202 bends with said the 4th shell fragment 204 in opposite directions and about said substrate 12 symmetries, said second shell fragment 202 constitutes one second shell fragment to 200 with said the 4th shell fragment 204; Said first shell fragment to 100 with said second shell fragment to the said screening cover 2 of 200 acting in conjunction clampings.

Please with reference to Fig. 3, Fig. 4 and Fig. 5, the width of said first shell fragment 201 and said second shell fragment 202 is all less than the width of said first side plate 121, and the width of said the 3rd shell fragment 203 and said the 4th shell fragment 204 is all less than the width of said second side plate 122; And said first shell fragment 201, said second shell fragment 202, said the 3rd shell fragment 203 and said the 4th shell fragment 204 all narrow down along the direction that itself extends gradually, formation one space 123 between said thus first shell fragment 201, said second shell fragment 202, said the 3rd shell fragment 203 and said the 4th shell fragment 204 said fixed head 11 adjacent separately with it; The said sidewall 21 of the said screening cover 2 of an inclined-plane 125 guiding that is obliquely installed along the end face of each shell fragment and said first side plate 121 or said second side plate 122 correctly is installed in the said geometrical clamp 1.

Please with reference to Fig. 3, Fig. 4 and Fig. 5, said first shell fragment to 100, said second shell fragment to 200, said first side plate 121, said second side plate 122 and said substrate 12 are common forms one and plug space 126 and supply the said sidewall 21 of said screening cover 2 to plug so that said screening cover 2 is fixed on the said circuit board 3; Be arranged with a breach 127 between adjacent said substrate 12 and the said fixed head 11; Said breach 127 is communicated with said space 123, makes said first shell fragment 201, said second shell fragment 202, said the 3rd shell fragment 203 and said the 4th shell fragment 204 all directly not contact with said fixed head 11.

During operation; Please with reference to Fig. 1; At first; Said electronic unit 4 is laid on the said circuit board 3, more said geometrical clamp 1 is enclosed said electronic unit 4, at this moment; Said space 123 is communicated with said breach 127; Add tin cream (not shown) when said geometrical clamp 1 being soldered to said circuit board 3, said tin cream (not shown) is heated to produce and climbs the tin phenomenon since said first shell fragment 201, said second shell fragment 202, said the 3rd shell fragment 203 and said the 4th shell fragment 204 all and its have said space 123 between said fixed head 11 of vicinity separately; Said tin cream like this (not shown) can not climbed up said first shell fragment 201, said second shell fragment 202, said the 3rd shell fragment 203 and said the 4th shell fragment 204; But climb up said first side plate 121 and said second side plate 122 along said breach 127, because the width of said first shell fragment 201 and said second shell fragment 202 is all less than the width of said first side plate 121, the width of said the 3rd shell fragment 203 and said the 4th shell fragment 204 is all less than the width of said second side plate 122; Climbing in the tin process of said tin cream (not shown); Said tin cream (not shown) receives the restriction of gravity and distance in said first side plate 121 and said second side plate 122 guild of swashing, and said tin cream (not shown) can not continue to climb tin, thereby can avoid said tin cream (not shown) to be piled up in said first shell fragment 201, said second shell fragment 202, said the 3rd shell fragment 203 and said the 4th shell fragment 204 places; That is, avoiding influencing said screening cover 2 is fixed in the said geometrical clamp 1 smoothly; Then said screening cover 2 is positioned over the top of said electronic unit 4, makes four said sidewall 21 corresponding said geometrical clamps 1 of said screening cover 2.

Please with reference to Fig. 2, with four said sidewall 21 corresponding inserted of said screening cover 2 in said geometrical clamp 1, to isolate said electronic unit 4 and extraneous electromagnetic interference.

Please with reference to Fig. 3, Fig. 6 and Fig. 7; Said sidewall 21 correspondences were installed on said geometrical clamp at interior 1 o'clock; Said sidewall 21 at first touches said first side plate 121 and said second side plate 122, gets into saidly to plug space 126, and said first shell fragment to 100 and said second shell fragment 200 shell fragments are expanded; To hold said sidewall 21; After said sidewall 21 correct installations, said first shell fragment is mounted to effect said circuit board 3 on to clamp said sidewall 21, so can reach with said screening cover 2 to 200 all inside elastic recoverys with said second shell fragment to 100.

In sum, the utility model stationary fixture has following advantage:

1. said screening cover 2 is fixed on the said circuit board 3 through said geometrical clamp 1, can shield said electronic unit 4 and the electromagnetic interference between the external world in said screening cover 2.

2. because said screening cover 2 through said geometrical clamp 1 removable being installed on the said circuit board 3, conveniently is positioned at the replacing and the maintenance of the said electronic unit 4 of said screening cover 2.

3. because said first shell fragment 201 all is the angle setting with said first side plate 121 with said second shell fragment 202, can increase the elastic strength of said first shell fragment 201 and said second shell fragment 202; Said the 3rd shell fragment 203 all is the angle setting with said second side plate 122 with said the 4th shell fragment 204, can increase the elastic strength of said the 3rd shell fragment 203 and said the 4th shell fragment 204.

4. owing to said first shell fragment 201 all forms from said first the extending laterally of side plate 121 with said second shell fragment 202; Said the 3rd shell fragment 203 all forms from said second the extending laterally of side plate 122 with said the 4th shell fragment 204; The elasticity of said thus first shell fragment 201, said second shell fragment 202, said the 3rd shell fragment 203 and said the 4th shell fragment 204 extends and does not all receive limitation in height, is beneficial to the design of product panelized.

5. the said sidewall 21 of the said screening cover 2 of said inclined-plane 125 guiding correctly is installed in the said geometrical clamp 1.

6. owing to said first shell fragment 201 forms by said first side plate, 121 two relative lateral bucklings with said second shell fragment 202; And extend towards said second side plate 122; Said the 3rd shell fragment 203 forms by said second side plate, 122 two relative lateral bucklings with said the 4th shell fragment 204; And extend towards said first side plate 121, when said first shell fragment to 100 with said second shell fragment during to the said screening cover 2 of 200 clampings, said first shell fragment to 100 with said second shell fragment to 200 impose on said screening cover 2 chucking power tilt with the direction that picks and places said screening cover 2; Its part decomposing force is identical with the direction that picks and places said screening cover 2, conveniently picks and places.

7. because the said space 123 of formation between said first shell fragment 201, said second shell fragment 202, said the 3rd shell fragment 203 and said the 4th shell fragment 204 said fixed head 11 adjacent separately with it; When using said tin cream (not shown) said geometrical clamp 1 is welded in 3 last times of said circuit board; Because the existence in said space 123; Said tin cream (not shown) can not be climbed up said first shell fragment 201, said second shell fragment 202, said the 3rd shell fragment 203 and said the 4th shell fragment 204, and therefore having avoided climbing the tin phenomenon influences the problem that said screening cover 2 firmly covers.

8. because each said sidewall 21 is arranged with said two grooves 23 at interval; And each said groove 23 is all stepped; When said sidewall 21 is clamped by said geometrical clamp 1, between said circuit board 3, said geometrical clamp 1 and said sidewall 21, do not produce any slit, increased shield effectiveness.

More than specify the explanation of the preferred embodiment be merely the utility model, the claim of non-so limitation the utility model is so all this creation of utilization specifications and the equivalence techniques variation for it of diagramatic content institute all are contained in the claim of this creation.

Claims

1. a geometrical clamp is used for a screening cover is fixed to a circuit board, it is characterized in that, comprising:

At least one substrate;

At least two fixed heads are welded on the said circuit board, and said two fixed heads are positioned at the both sides of said substrate, and said substrate connects said two fixed heads;

At least two side plates; The two ends relative from said substrate upwards vertically are bent to form respectively; The both sides that each said side plate is relative are bent to form a shell fragment respectively; Said shell fragment extends towards another said side plate, forms one between two said side plates and its each said shell fragment and plugs the space and be used for ccontaining said screening cover, formation one space between each said shell fragment and the adjacent said fixed head.

2. geometrical clamp according to claim 1 is characterized in that: it is right that the per two said shell fragments that bend in opposite directions constitute a shell fragment, and said two shell fragments on the same said side plate are to the said screening cover of common clamping.

3. geometrical clamp according to claim 1 is characterized in that: said shell fragment and said side plate are an angle.

4. geometrical clamp according to claim 1 is characterized in that: the width of said side plate is greater than the width of said shell fragment.

5. geometrical clamp according to claim 1 is characterized in that: be arranged with a breach between said substrate and the said fixed head, and said breach is communicated with said space.

6. geometrical clamp according to claim 1 is characterized in that: said shell fragment narrows down along bearing of trend gradually.

7. geometrical clamp according to claim 1 is characterized in that: be positioned at the longitudinal axis symmetry of same said side plate relative two free-ended said two shell fragments about said side plate.

8. geometrical clamp according to claim 1 is characterized in that: said substrate and said fixed head are positioned at same plane.