CN220235322U

CN220235322U - Metal shielding cover

Info

Publication number: CN220235322U
Application number: CN202321345596.XU
Authority: CN
Inventors: 谢超群
Original assignee: Shenzhen Comen Medical Instruments Co Ltd
Current assignee: Shenzhen Comen Medical Instruments Co Ltd
Priority date: 2023-05-30
Filing date: 2023-05-30
Publication date: 2023-12-22
Anticipated expiration: 2033-05-30

Abstract

The utility model discloses a metal shielding cover, which comprises a main board and a shielding shell, wherein a board card is inserted on the main board, the shielding shell is arranged above the board card, a bare copper layer is arranged on the main board, the bare copper layer is annularly arranged on the outer side of the board card in a square shape, a shielding clamp for inserting the shielding shell is welded on the bare copper layer, the shielding shell is of a hollow structure, and the side wall of the shielding shell is inserted into a gap of the shielding clamp to be clamped and fixed. The utility model covers the board card in the shielding shell, inserts the shielding shell into the gap of the shielding clamp, clamps and fixes the shielding shell, and solves the problems of inconvenient disassembly and large occupied plane caused by fixing the shielding shell through the lug folding structure in the prior art.

Description

Metal shielding cover

Technical Field

The utility model relates to the technical field of medical equipment, in particular to a metal shielding cover.

Background

Medical devices typically include a main movement module, a control panel module, and a display device module. The main machine core module is an important component for realizing the functions of the whole equipment, and mainly comprises a main board, a power board, a transmitting board, a receiving board and an industrial control board. In order to ensure stable operation of the main movement module, design of electromagnetic compatibility is one of technical directions that need to be considered in the main movement module. Taking the power board module as an example, in order to make the medical device pass through the relevant requirements such as EMC, EMI or safety inspection, a metal shielding case needs to be installed in the power board module area, and the prior art is as follows: a combined electromagnetic shielding cover has the publication number: CN217694188U, the shielding case is fixed by arranging a lug structure at the edge of the shielding case and fastening the shielding case by screws.

The mode of fixing the shielding cover through the lug folding structure is inconvenient to assemble and disassemble, occupies a larger plane space, and is unfavorable for wiring design of a circuit board and layout of components and parts under the condition of space shortage.

There is thus a need for improvements and improvements in the art.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, the present utility model aims to provide a metal shielding case, so as to solve the problem that the existing shielding case occupies a larger planar space.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a metal shield cover, includes mainboard and shield shell, insert on the mainboard and be equipped with the integrated circuit board, the shield shell set up in the top of integrated circuit board, be provided with bare copper layer on the mainboard, bare copper layer be square cyclic annular set up in the outside of integrated circuit board, the welding has the confession on the bare copper layer the shield clamp that the shield shell pegged graft, the shield shell is hollow structure, the lateral wall of shield shell inserts the centre gripping is fixed in the clearance of shield clamp.

The number of the shielding clamps is even, and the number of the shielding clamps arranged on the two opposite sides of the bare copper layer is the same.

The shielding clamp comprises a base, two clamping parts are arranged on the base, each clamping part comprises two clamping pieces which are oppositely arranged, and the clamping pieces are integrally formed with the base.

The clamping piece comprises a supporting part, a first inclined part, an abutting part and a second inclined part, wherein the supporting part is connected with the side edge of the base and extends upwards, the first inclined part is connected with the upper end of the supporting part and extends towards a gap close to the shielding clamp, the abutting part is connected with the upper end of the first inclined part, and the second inclined part is connected with the upper end of the abutting part and extends towards a gap far away from the shielding clamp.

The gap size of the shielding clamp is 0.3-0.4mm.

The shielding clamp is made of beryllium bronze.

And an electroplated nickel layer or an electroplated tin layer is arranged on the shielding clamp.

The thickness of the bare copper layer is 5-20 mu m.

The shielding shell is provided with a plurality of radiating holes in a rectangular array, the diameter of each radiating hole is 3-4mm, and the distance between the radiating holes is 8-10mm.

The main board is provided with a welding nut column and a butt joint socket which is spliced with the board card, and the board card is provided with a threaded hole which is coaxial with the welding nut column and is used for a screw to pass through.

Compared with the prior art, the metal shielding cover provided by the utility model comprises a main board and a shielding shell, wherein a board card is inserted on the main board, the shielding shell is arranged above the board card, a bare copper layer is arranged on the main board, the bare copper layer is annularly arranged on the outer side of the board card in a square shape, a shielding clamp for inserting the shielding shell is welded on the bare copper layer, the shielding shell is in a hollow structure, and the side wall of the shielding shell is inserted into a gap of the shielding clamp to be clamped and fixed. The utility model covers the board card in the shielding shell, inserts the shielding shell into the gap of the shielding clamp, clamps and fixes the shielding shell, and solves the problems of inconvenient disassembly and large occupied plane caused by fixing the shielding shell through the lug folding structure in the prior art.

Drawings

Fig. 1 is an exploded view of a metal shield provided by the present utility model.

Fig. 2 is a cross-sectional view of a metal shield provided by the present utility model.

Fig. 3 is a schematic view of an angle structure of a shielding clip according to the present utility model.

Fig. 4 is a schematic view of another angle of the shielding clip according to the present utility model.

Reference numerals and signs

The main board 1, the bare copper layer 11, the welding nut post 12, the butt socket 13, the shielding shell 2, the heat dissipation holes 21, the board card 3, the screw 31, the screw holes 32, the shielding clip 4, the gap 41, the base 42, the clamping part 43, the clamping piece 44, the supporting part 441, the first inclined part 442, the abutting part 443 and the second inclined part 444.

Detailed Description

In order to make the objects, technical solutions and effects of the present utility model clearer and more specific, the present utility model will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

It is noted that when an element is referred to as being "mounted," "secured," or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.

It should be noted that, in the embodiments of the present utility model, terms such as left, right, up, and down are merely relative concepts or references to normal use states of the product, and should not be construed as limiting.

The utility model provides a metal shielding case, referring to fig. 1-4, which comprises a main board 1 and a shielding shell 2, wherein a board card 3 is inserted on the main board 1, the shielding shell 2 is arranged above the board card 3, a bare copper layer 11 is arranged on the main board 1, the bare copper layer 11 is arranged on the outer side of the board card 3 in a square annular shape, a shielding clamp 4 for inserting the shielding shell 2 is welded on the bare copper layer 11, the shielding shell 2 is in a hollow structure, and the side wall of the shielding shell 2 is inserted into a gap 41 of the shielding clamp 4 for clamping and fixing. The utility model covers the board card 3 in the shielding shell 2, inserts the shielding shell 2 into the gap 41 of the shielding clamp 4, clamps and fixes the shielding shell 2, and solves the problems of inconvenient disassembly and assembly and larger occupied plane caused by fixing the shielding cover through the lug folding structure in the prior art.

Further, a welding nut column 12 and a butt joint socket 13 which is spliced with the board card 3 are arranged on the main board 1, a threaded hole 32 which is coaxial with the welding nut column 12 and is used for a screw 31 to pass through is arranged on the board card 3, the board card 3 is placed on the welding nut column 12 and is fastened by the screw 31, the height of the welding nut column 12 is higher than that of the butt joint socket 13, a space is reserved for the butt joint socket 13, and the butt joint socket 13 is convenient to splice with the card handling 3; the threaded holes 32 are arranged near four corners of the board card 3, so that the layout of components on the board card 3 is prevented from being affected, and the board card 3 is inserted into the docking socket 13 to realize signal transmission.

Further, the number of the shielding clips 4 is an even number, and the number of the shielding clips 4 provided on the opposite sides of the bare copper layer 11 is the same. In the embodiment of the application, the bare copper layer 11 is rectangular annular, two opposite sides refer to rectangular two long sides or two short sides, and the quantity of the shielding clips 4 arranged on the two long sides and the two short sides of the bare copper layer 11 is the same, so that the clamping effects of the two opposite sides on the shielding shell 2 are nearly the same, and the shielding shell 2 is more convenient to detach from the shielding clips 4 on the premise of stably clamping the shielding shell 2.

Further, the shielding clip 4 includes a base 42, two clamping portions 43 are disposed on the base 42, the clamping portions 43 include two clamping pieces 44 disposed opposite to each other, and two clamping portions 43 are disposed on the same base 42, so that the clamping length of a single shielding clip 4 is increased, and the stability of the shielding clip 4 for clamping the shielding shell 2 is improved; when two centre gripping piece 44 centre gripping shield shell 2, one is located the inboard of shield shell 2, and one is located the outside of shield shell 2 for shield shell 2 easy dismounting, low cost, occupation plane space is less and need not to punch on mainboard 1 and fix shield shell 2, has avoided occupation mainboard 1 space and influence the problem of mainboard 1 wiring and the overall arrangement of components and parts when punching fixed shield shell 2 on mainboard 1 among the prior art. The clamping piece 44 and the base 42 are integrally formed, that is, two side edges of the base 42 are respectively bent towards one side of the gap 41 of the shielding clip 4 by 90 degrees to form the clamping piece 44, and meanwhile, the integrally formed clamping piece 44 and the base 42 enable the strength of the whole shielding clip 4 to be larger, and the shielding clip 4 is welded on the main board 1 more stably. The width of the bare copper layer 11 is larger than that of the base 42, if the width of the base 42 is 2.08mm, the bare copper layer 11 is 3-3.5mm, so that the stability of welding the shielding clip 4 on the motherboard 1 is ensured. The thickness of the shielding clamp 4 is 0.2mm, and the thickness of the shielding clamp 4 is limited, so that the stability of the shielding clamp 4 for clamping the shielding shell 2 is guaranteed, and the shielding clamp 4 can use the shielding shell 2 within a larger thickness range.

Further, the holding piece 44 includes a supporting portion 441 connected to the side of the base 42 and extending upward, a first inclined portion 442 connected to the upper end of the supporting portion 441 and extending toward the gap 41 near the shield clip 4, an abutting portion 443 connected to the upper end of the first inclined portion 442, and a second inclined portion 444 connected to the upper end of the abutting portion 443 and extending toward the gap 41 away from the shield clip 4.

Further, the abutment portion 443 is configured to abut against a side wall of the shielding shell 2, and clamp and fix the shielding shell 2 on both inner and outer sides of the shielding shell 2, the clamping piece 44 is bent by 45 degrees toward the gap 41 close to the shielding clip 4 to form a first inclined portion 442, and then is bent by 35 degrees toward the gap 41 far from the shielding clip 4 to form a second inclined portion 444, in this process, the gap 41 of the shielding clip 4 is also limited, and a convex bent portion formed by bending the first inclined portion 442 and the second inclined portion 444 is the abutment portion 443; the supporting portion 441 is arranged, so that the contact height between the abutting portion 443 and the side wall of the shielding shell 2 is increased, and the clamping effect of the shielding clamp 4 on the shielding shell 2 is more stable; the second inclined portion 444 plays a role in guiding the side wall of the shield shell 2 before the shield shell 2 is inserted into the gap 41 of the shield clip 4, so that the shield shell 2 can be inserted more conveniently.

Further, the gap 41 of the shielding clip 4 is 0.3-0.4mm in size. The shielding clip 4 is made of beryllium bronze. Preferably, the gap 41 of the shielding clip 4 is 0.3mm, the thickness of the shielding shell 2 is 0.5-1.2mm, beryllium bronze has high hardness, elastic limit, fatigue limit and wear resistance, and the beryllium bronze material is adopted as the shielding clip 4, so that the clamping stability of the shielding clip 4 to the shielding shell 2 is improved, the shielding clip 4 can adapt to the shielding shell 2 in a larger thickness range, and meanwhile, the problem of the reduction of the clamping effect of the shielding shell 2 after multiple disassembly is avoided.

Further, the nickel plating layer or the tin plating layer is arranged on the shielding clamp 4, so that the weldability of the shielding clamp 4 on the main board 1 is improved, the welding effect of the shielding clamp 4 is better, and the shielding clamp 4 is prevented from being taken off from the main board 1 when the shielding shell 2 is detached from the shielding clamp 4, so that the follow-up normal use of the shielding clamp 4 is affected.

Further, the thickness of the bare copper layer 11 is 5-20 μm. Preferably, the thickness of the bare copper layer 11 is 10 μm, the thickness of the bare copper layer 11 is smaller, the welding quality of the shielding clip 4 on the motherboard 1 is improved, the thickness of the bare copper layer 11 is larger, the welding cost is higher, and the shielding effect is affected.

Further, the shielding shell 2 is provided with a plurality of heat dissipation holes 21 in a rectangular array, so that the heat dissipation effect is uniform, the diameter of each heat dissipation hole 21 is 3-4mm, and the distance between the heat dissipation holes 21 is 8-10mm. The heat dissipation holes 21 are formed, so that heat generated during the operation of the board card 3 can be timely discharged through the heat dissipation holes 21, the influence on the normal use of the board card 3 due to heat accumulation in the shielding shell 2 is avoided, and meanwhile, the weight reduction effect is realized through the heat dissipation holes 21. Preferably, the diameter of the heat dissipation holes 21 is 3.5mm, the distance between the heat dissipation holes 21 is 9mm, the larger the distance between the heat dissipation holes 21 on the shielding shell 2 with the same area is, the smaller the number of the heat dissipation holes 21 is, the shielding effect of the shielding shell 2 can be directly affected by the arrangement of the heat dissipation holes 21, when the diameter of the heat dissipation holes 21 is larger and the number of the heat dissipation holes 21 is larger, the heat dissipation effect is better but the shielding effect is poorer, and the heat dissipation effect and the shielding effect are balanced by limiting the diameter of the heat dissipation holes 21 and the distance between the heat dissipation holes 21.

In summary, the metal shielding case provided by the utility model comprises a main board and a shielding shell, wherein a board card is inserted on the main board, the shielding shell is arranged above the board card, a bare copper layer is arranged on the main board, the bare copper layer is arranged on the outer side of the board card in a square annular shape, a shielding clamp for inserting the shielding shell is welded on the bare copper layer, the shielding shell is in a hollow structure, and the side wall of the shielding shell is inserted into a gap of the shielding clamp to be clamped and fixed. The utility model covers the board card in the shielding shell, inserts the shielding shell into the gap of the shielding clamp, clamps and fixes the shielding shell, and solves the problems of inconvenient disassembly and large occupied plane caused by fixing the shielding shell through the lug folding structure in the prior art.

It will be understood that equivalents and modifications will occur to those skilled in the art in light of the present utility model and their spirit, and all such modifications and substitutions are intended to be included within the scope of the present utility model as defined in the following claims.

Claims

1. The utility model provides a metal shield cover, its characterized in that, includes mainboard (1) and shield shell (2), insert on mainboard (1) and be equipped with integrated circuit board (3), shield shell (2) set up in the top of integrated circuit board (3), be provided with naked copper layer (11) on mainboard (1), naked copper layer (11) be square cyclic annular set up in the outside of integrated circuit board (3), the welding has the confession on naked copper layer (11) shield clamp (4) of shield shell (2) grafting, shield shell (2) are hollow structure, the lateral wall of shield shell (2) inserts in clamp (4) clearance (41) centre gripping is fixed.

2. The metallic shield can according to claim 1, wherein the number of the shield clips (4) is an even number, and the number of the shield clips (4) provided on the opposite sides of the bare copper layer (11) is the same.

3. The metal shielding can according to claim 1, wherein the shielding clip (4) comprises a base (42), two clamping portions (43) are provided on the base (42), the clamping portions (43) comprise two clamping pieces (44) which are oppositely arranged, and the clamping pieces (44) and the base (42) are integrally formed.

4. A metal shield according to claim 3, wherein the holding piece (44) includes a supporting portion (441) that connects the side edge of the base (42) and extends upward, a first inclined portion (442) that connects the upper end of the supporting portion (441) and extends toward the gap (41) near the shield clip (4), an abutting portion (443) that connects the upper end of the first inclined portion (442), and a second inclined portion (444) that connects the upper end of the abutting portion (443) and extends toward the gap (41) away from the shield clip (4).

5. A metallic shield according to claim 1, characterized in that the gap (41) of the shield clip (4) is 0.3-0.4mm in size.

6. The metallic shielding cage according to claim 1, characterized in that the shielding clip (4) is of beryllium bronze.

7. The metallic shield can according to claim 6, wherein the shield clip (4) is provided with an electroplated nickel layer or an electroplated tin layer.

8. The metallic shield according to claim 1, characterized in that the bare copper layer (11) has a thickness of 5-20 μm.

9. The metal shielding case according to claim 1, wherein a plurality of heat dissipation holes (21) in a rectangular array are formed in the shielding case (2), the diameter of the heat dissipation holes (21) is 3-4mm, and the distance between the heat dissipation holes (21) is 8-10mm.

10. The metal shielding case according to claim 1, wherein a welding nut post (12) and a butt socket (13) which is inserted into the board card (3) are arranged on the main board (1), and a threaded hole (32) which is coaxial with the welding nut post (12) and is used for passing a screw (31) is arranged on the board card (3).