CN215956980U

CN215956980U - STM conductive foam for PCB grounding shield

Info

Publication number: CN215956980U
Application number: CN202122366743.9U
Authority: CN
Inventors: 耿德国; 苏本卫; 牛朋飞
Original assignee: Kunshan Guanxu Electronic Material Co ltd
Current assignee: Kunshan Guanxu Electronic Material Co ltd
Priority date: 2021-09-29
Filing date: 2021-09-29
Publication date: 2022-03-04
Anticipated expiration: 2031-09-29

Abstract

The utility model discloses STM conductive foam for a PCB ground shield, which comprises conductive foam arranged at the upper end of a bottom plate, wherein the conductive foam comprises flame-retardant sponge and conductive cloth wrapped at the periphery of the flame-retardant sponge; through the use of the L type mounting bracket and the cooperation mounting that four ends of bottom plate set up, realized the cotton fixed of four ends of electrically conductive bubble, the electrically conductive cloth contactless of the cotton global parcel of electrically conductive bubble of L type mounting bracket and electrically conductive cloth periphery side and L type mounting bracket leaves certain space simultaneously, has not only improved the cotton fixity of electrically conductive bubble, has increased the cotton rate of heat dissipation and the electric conductive property of electrically conductive bubble simultaneously, has improved the cotton practicality of electrically conductive bubble.

Description

STM conductive foam for PCB grounding shield

Technical Field

The utility model relates to the field of conductive foam, in particular to STM conductive foam for PCB grounding shielding.

Background

The conductive foam is formed by wrapping conductive cloth on the flame-retardant sponge, has good surface conductivity after a series of treatments, can be easily fixed on a device to be shielded by an adhesive tape, and is often suitable for shielding of grounding of a PCB. The STM patch foam has the advantages that shielding materials with different section shapes, installation methods, UL grades and shielding effects can be selected, the STM patch foam has excellent impact absorption characteristics, and the STM patch foam has the effect of protecting internal accessories for buffering.

Chinese patent with publication number CN211184817U discloses a cotton mounting structure of conductive bubble, which comprises a mounting base and conductive bubble cotton, wherein the conductive cloth with a large area at the lower end of the conductive bubble cotton is positioned in the mounting base, so that the conductive quality and the heat dissipation effect of the conductive bubble cotton are greatly reduced, and therefore, an STM conductive bubble cotton for grounding shielding of a PCB is provided.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides the STM conductive foam for the grounding shield of the PCB, so as to solve the problems in the background art.

In order to solve the technical problems, the utility model provides the following technical scheme: the utility model provides a conductive bubble of STM is cotton for PCB board ground connection shielding, is cotton including the conductive bubble of setting in the bottom plate upper end, conductive bubble is cotton including fire-retardant sponge and all sides parcel's electrically conductive cloth, the equal rigid coupling in four ends of upside of bottom plate has L type mounting bracket, all leave the certain space between the cotton all sides of electrically conductive bubble and a plurality of L type mounting bracket, it is a plurality of all contact with four ends of the cotton upside of electrically conductive bubble in L type mounting bracket upper end bottom side, and the inside of a plurality of L type mounting bracket upper ends all is equipped with the mounting of pegging graft with four ends of the cotton upside of electrically conductive bubble.

As a preferred technical scheme of the utility model, the device also comprises a support plate fixedly connected with the bottom side of the conductive foam, and support pieces are symmetrically arranged between the bottom side of the support plate and the upper side of the bottom plate.

As a preferred technical scheme of the utility model, the supporting piece comprises a telescopic column and an auxiliary spring sleeved at the outer end of the telescopic column.

As a preferable technical scheme of the utility model, two ends of the bottom side of the bottom plate are symmetrically provided with fixing holes.

As a preferred technical scheme of the utility model, cavities are arranged inside the upper ends of the plurality of L-shaped mounting frames, the fixing member comprises a fixing column longitudinally penetrating through the cavities, the upper ends of the fixing columns slidably extend to the upper ends of the L-shaped mounting frames and are fixedly connected with a push plate, fixing grooves are formed in four ends of the upper side of the conductive foam, the lower ends of the fixing columns slidably extend to the inside of the fixing grooves, clamping springs are slidably sleeved on the circumferential surfaces of the fixing columns inside the cavities, the upper ends of the clamping springs are fixedly connected with the top walls of the cavities, and the lower ends of the clamping springs are fixedly connected with the surfaces of the fixing columns.

As a preferred technical scheme of the utility model, the lower end surface of the fixed column positioned in the cavity is fixedly sleeved with a support ring, and the lower end of the clamping spring is fixedly connected with the upper side of the support ring.

As a preferable technical solution of the present invention, the circumferential surface of the fixing groove is equidistantly provided with a plurality of arc-shaped protrusions.

Compared with the prior art, the utility model can achieve the following beneficial effects:

1. the fixing of the four ends of the conductive foam is realized through the L-shaped mounting frame arranged at the four ends of the bottom plate and the use of the matched fixing piece, meanwhile, the L-shaped mounting frame is not in contact with the conductive cloth wrapped on the peripheral surface of the conductive foam, and a certain space is left between the peripheral side of the conductive cloth and the L-shaped mounting frame, so that the fixing property of the conductive foam is improved, the heat dissipation rate and the conductivity of the conductive foam are increased, and the practicability of the conductive foam is improved;

2. through the setting of backup pad and support piece, not only improved the cotton support of electrically conductive bubble, improved the cotton elasticity of electrically conductive bubble simultaneously, improved the cotton barrier propterty to components and parts of electrically conductive bubble.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a top view of the present invention;

FIG. 3 is an enlarged view of a portion a of FIG. 1;

FIG. 4 is a schematic structural view of the support member of the present invention;

wherein: 1. a base plate; 2. a flame-retardant sponge; 3. a conductive cloth; 4. an L-shaped mounting bracket; 5. a support member; 6. a support plate; 7. a fixing hole; 8. conductive foam; 9. a cavity; 10. pushing the plate; 11. fixing a column; 12. a clamping spring; 13. a support ring; 14. fixing grooves; 15. an arc-shaped bump; 16. a telescopic column; 17. an auxiliary spring.

Detailed Description

The present invention will be further described with reference to specific embodiments for the purpose of facilitating an understanding of technical means, characteristics of creation, objectives and functions realized by the present invention, but the following embodiments are only preferred embodiments of the present invention, and are not intended to be exhaustive. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative efforts belong to the protection scope of the present invention. The experimental methods in the following examples are conventional methods unless otherwise specified, and materials, reagents and the like used in the following examples are commercially available unless otherwise specified.

Example (b):

as shown in fig. 1 and fig. 1, the utility model provides STM conductive foam for a ground shield of a PCB, which includes conductive foam 8 arranged at the upper end of a bottom plate 1, the conductive foam 8 includes a flame-retardant sponge 2 and conductive cloth 3 wrapped around the flame-retardant sponge 2, fixing holes 7 are symmetrically formed at two ends of the bottom side of the bottom plate 1, the fixing holes 7 are penetrated through by bolts to fix the bottom plate 1, L-shaped mounting frames 4 are fixedly connected to four ends of the upper side of the bottom plate 1, a certain space is reserved between the periphery of the conductive foam 8 and a plurality of L-shaped mounting frames 4, the bottom sides of the upper ends of the plurality of L-shaped mounting frames 4 are contacted with four ends of the upper side of the conductive foam 8, and fixing members inserted into four ends of the upper side of the conductive foam 8 are arranged inside the upper ends of the plurality of the L-shaped mounting frames 4;

through the use of the L type mounting bracket 4 and the cooperation mounting that four ends of bottom plate 1 set up, realized the cotton 8 four ends of electrically conductive bubble fixed, the electrically conductive cloth 3 contactless of the cotton 8 global parcel of electrically conductive bubble of L type mounting bracket 4 and electrically conductive bubble simultaneously, and leave certain space between 3 periphery sides of electrically conductive cloth and the L type mounting bracket 4, not only improved the cotton 8's of electrically conductive bubble fixity, increased the cotton 8's of electrically conductive bubble rate of heat dissipation and electric conductive property simultaneously, improved the cotton 8's of electrically conductive bubble practicality.

As shown in fig. 1 and 4, in the embodiment, a supporting plate 6 is fixedly connected to the bottom side of a conductive foam 8, supporting members 5 are symmetrically arranged between the bottom side of the supporting plate 6 and the upper side of a bottom plate 1, and each supporting member 5 comprises a telescopic column 16 and an auxiliary spring 17 sleeved at the outer end of the telescopic column 16;

through the setting of backup pad 6 and support piece 5, not only improved the cotton 8 support of electrically conductive bubble, improved the cotton 8 elasticity of electrically conductive bubble simultaneously, improved the protective properties of electrically conductive bubble cotton 8 to components and parts.

As shown in fig. 3, in the embodiment, cavities 9 are formed inside the upper ends of a plurality of L-shaped mounting frames 4, the fixing member includes fixing columns 11 longitudinally penetrating through the cavities 9, the upper ends of the fixing columns 11 slidably extend to the upper ends of the L-shaped mounting frames 4 and are fixedly connected with push plates 10, fixing grooves 14 are formed in four ends of the upper side of the conductive foam 8, the lower ends of the fixing columns 11 slidably extend into the fixing grooves 14, clamping springs 12 are slidably sleeved on the circumferential surfaces of the fixing columns 11 located inside the cavities 9, the upper ends of the clamping springs 12 are fixedly connected with the top wall of the cavities 9, and the lower ends of the clamping springs are fixedly connected with the surfaces of the fixing columns 11;

through the cooperation of push pedal 10, fixed column 11 and fixed slot 14, realize the fixed of four ends of electrically conductive bubble cotton 8, cooperation centre gripping spring 12's use simultaneously has a thrust down to the 11 lower extremes of fixed column, improves the stability between mounting and the electrically conductive bubble cotton 8.

As shown in fig. 3, in the embodiment, a supporting ring 13 is fixedly sleeved on the lower end surface of the fixing column 11 located inside the cavity 9, and the lower end of the clamping spring 12 is fixedly connected with the upper side of the supporting ring 13; the setting of support ring 13 improves the area of contact of centre gripping spring 12 lower extreme and fixed column 11, has improved the stability that centre gripping spring 12 supported.

As shown in fig. 3, the present embodiment discloses that a plurality of arc-shaped protrusions 15 are equidistantly disposed on the circumferential surface of the fixing groove 14; the setting of arc lug 15 carries out the centre gripping joint to fixed column 11 lower extreme, further improves the stability between mounting and the electrically conductive bubble cotton 8.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a STM conductive foam for PCB board ground shield, is cotton including the conductive foam (8) of setting in bottom plate (1) upper end, conductive foam cotton (8) are including fire-retardant sponge (2) and electrically conductive cloth (3) of week side parcel, its characterized in that: all the rigid couplings of the upside of bottom plate (1) are had L type mounting bracket (4) in four ends, all leave the space, it is a plurality of between week side and a plurality of L type mounting bracket (4) of electrically conductive bubble cotton (8) the upside of L type mounting bracket (4) upper end bottom side all with electrically conductive bubble cotton (8) four end contacts, and the inside of a plurality of L type mounting bracket (4) upper end all is equipped with the mounting of pegging graft with electrically conductive bubble cotton (8) upside four ends.

2. An STM conductive foam for a PCB ground shield according to claim 1, characterized in that: the conductive foam heating device is characterized by further comprising a supporting plate (6) fixedly connected with the bottom side of the conductive foam (8), and supporting pieces (5) are symmetrically arranged between the bottom side of the supporting plate (6) and the upper side of the bottom plate (1).

3. An STM conductive foam for a PCB ground shield according to claim 2, characterized in that: the supporting piece (5) comprises a telescopic column (16) and an auxiliary spring (17) sleeved at the outer end of the telescopic column (16).

4. An STM conductive foam for a PCB ground shield according to claim 1, characterized in that: the bottom plate (1) is provided with fixing holes (7) at two ends of the bottom side symmetrically.

5. An STM conductive foam for a PCB ground shield according to claim 1, characterized in that: a plurality of inside of L type mounting bracket (4) upper end all is equipped with cavity (9), the mounting is including vertically running through inside fixed column (11) of cavity (9), fixed column (11) upper end slides and extends to upper end and the rigid coupling of L type mounting bracket (4) and has push pedal (10), fixed slot (14) have all been seted up to the upside of electrically conductive bubble cotton (8) four ends, fixed column (11) lower extreme slides and extends to the inside of fixed slot (14), is located the global slip cover of the inside fixed column (11) of cavity (9) is equipped with clamping spring (12), clamping spring (12) upper end and cavity (9) roof rigid coupling, and its lower extreme and fixed column (11) surface rigid coupling.

6. An STM conductive foam for a PCB ground shield according to claim 5, characterized in that: the lower end surface of a fixing column (11) positioned in the cavity (9) is fixedly sleeved with a support ring (13), and the lower end of the clamping spring (12) is fixedly connected with the upper side of the support ring (13).

7. An STM conductive foam for a PCB ground shield according to claim 5, characterized in that: the circumferential surface of the fixing groove (14) is equidistantly provided with a plurality of arc-shaped convex blocks (15).