Shielding cover for PCB

Abstract

The utility model discloses a shielding case for a PCB, and relates to the technical field of PBC main boards, the shielding case comprises a main board, electronic elements installed on the surface of the main board, and a shielding case, four corners of the shielding case are all provided with clamping members, the surface of the main board is provided with locking members, each clamping member comprises a connecting rod fixed on the four corners of the shielding case, one end of each connecting rod is movably sleeved with a positioning shaft, and the other end of each connecting rod is movably sleeved with a positioning pin. The surface of the positioning shaft is movably sleeved with a rotating ring, the surface of the rotating ring is movably sleeved with a clamping ring, a first arc-shaped groove is formed in the surface of the clamping ring, a telescopic rod is fixedly connected to the surface of the rotating ring, the locking piece comprises a sleeve fixed to the surface of the main plate, a spring is installed in the sleeve, and a second arc-shaped groove and a locking groove are formed in the surface of the sleeve. And the locking groove and the second arc-shaped groove are vertically arranged and are communicated with each other. According to the shielding case for the PCB provided by the utility model, the clamping piece and the locking piece are arranged, so that the shielding case can be quickly mounted and dismounted, and the maintenance of electronic elements is further facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of PBC mainboards, in particular to a shielding cover for PCB. Background Art

[0002] In PCB design, since there is mutual interference between components, cables, and wires on the circuit board, electromagnetic shielding and filtering measures are required. The PCB shielding cover is a metal protective cover that can cover the PCB to reduce or eliminate electromagnetic interference and radio frequency interference.

[0003] At present, the shielding cover for PCB is welded on the surface of the mainboard and covers the electronic components to achieve the purpose of eliminating electromagnetic interference and radio frequency interference. However, when the electronic components are repaired, the shielding cover needs to be disassembled for maintenance work. Therefore, the staff can only partially damage the shielding cover when disassembling it. This will cause the structure of the shielding cover to be damaged, resulting in reduced sealing, which in turn affects its shielding effect. Therefore, a shielding cover for PCB is urgently needed to solve the above problems. Utility Model Content

[0004] In view of the problem that the existing shielding cover needs to destroy its local structure when disassembling, which affects the shielding effect, the present utility model is proposed.

[0005] Therefore, the utility model aims to provide a shielding cover for PCB, which aims to solve the problem that the shielding cover needs to destroy its local structure when being disassembled, thus affecting the shielding effect.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: a shielding cover for PCB, comprising a mainboard, an electronic component mounted on the surface of the mainboard and a shielding cover, wherein the four corners of the shielding cover are all equipped with clamping parts, and the surface of the mainboard is equipped with a locking part, wherein the clamping part comprises a connecting rod fixed at the four corners of the shielding cover, and one end of the connecting rod and the end away from the shielding cover is movably sleeved with a positioning shaft, and the surface of the positioning shaft is movably sleeved with a rotating ring, and the surface of the rotating ring is movably sleeved with a clamping ring, and the surface of the clamping ring is provided with a first arc groove, and the surface of the rotating ring is fixedly connected with a telescopic rod, and the output end of the telescopic rod is rotatably connected with a pull rod, and the pull rod is located inside the first arc groove and is movably connected thereto, and the locking part comprises a sleeve fixed on the surface of the mainboard, and a spring is installed inside the sleeve, and the surface of the sleeve is provided with a second arc groove and a locking groove, and the locking groove is vertically arranged with the second arc groove and the two are connected, and the clamping ring is located inside the sleeve and at the top of the spring, and is movably connected thereto.

[0007] As a preferred solution of the PCB shielding cover described in the utility model, the clamping part also includes a limiting ring fixed on the surface of the rotating ring, the limiting ring is provided with two groups, a limiting groove is provided inside the clamping ring, the limiting ring is located inside the limiting groove and is movably connected with the limiting groove.

[0008] As a preferred solution of the PCB shielding cover of the utility model, the telescopic rod is located on the inner side of the two groups of limit rings, both sides of the telescopic rod are fixedly connected with a clamping bolt, the inner side of the clamping ring and both ends of the first arc groove are provided with a clamping groove, and the clamping bolt is located inside the clamping groove and movably connected thereto.

[0009] As a preferred solution of the PCB shielding cover of the utility model, the locking member also includes a slider installed on the outside of the top of the spring, a slide groove is opened inside the sleeve, and the slider is located inside the slide groove and movably connected thereto.

[0010] As a preferred solution of the PCB shielding cover described in the utility model, a sliding groove is provided on the surface of the sleeve, the sliding groove is located at an end away from the second arc groove, the connecting rod is located inside the sliding groove and movably connected thereto, and a heat sink is installed on the inner side of the shielding cover.

[0011] As a preferred solution of the PCB shielding cover of the utility model, the heat sink includes heat dissipation silica gel installed on the inner side of the shielding cover, and blocks are fixedly connected to both sides of the top of the heat dissipation silica gel.

[0012] As a preferred solution of the PCB shielding cover of the utility model, pull rings are installed on both sides of the bottom of the heat dissipating silica gel, and the pull rings are arranged in a semicircular shape.

[0013] As a preferred solution of the PCB shielding cover of the utility model, the bottom of the heat dissipation silicone is provided with equidistantly arranged straight grooves, the top of the heat dissipation silicone is provided with equidistantly arranged heat dissipation holes, and the straight grooves are connected to the heat dissipation holes.

[0014] Beneficial effects of the utility model:

[0015] 1. By providing the clamping parts and the locking parts, the shielding cover can be quickly installed and removed, which further avoids the problem of destroying part of the shielding cover structure when repairing the electronic components, which will reduce the shielding effect, and further facilitates the repair of the electronic components.

[0016] 2. Through the connection of heat dissipation holes and straight grooves, a multi-level heat dissipation system is formed, which improves the heat dissipation efficiency. The heat dissipation holes can accelerate the dissipation of heat, and the straight grooves can evenly distribute the heat to the entire shielding cover, thereby effectively improving the heat dissipation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0018] Figure 1 The figure shows the overall structure of the shielding cover for PCB of the utility model.

[0019] Figure 2 The utility model is a PCB shielding cover Figure 1 A-section structure enlarged view.

[0020] Figure 3 This is an exploded view of the structure of the clamping parts of the shielding cover for PCB of the utility model.

[0021] Figure 4 The utility model is a PCB shielding cover Figure 1 Enlarged view of the structure of part B.

[0022] Figure 5 The utility model is a schematic diagram of the overall structure of the locking member of the PCB shielding cover.

[0023] Figure 6 This is a diagram showing the locking structure of the PCB shielding cover of the utility model.

[0024] Figure 7 The utility model is a schematic diagram of the heat dissipation structure of the shielding cover for PCB.

[0025] Description of reference numerals:

[0026] 1. Mainboard; 2. Electronic components; 3. Shielding cover; 4. Snap-on; 41. Connecting rod; 42. Positioning shaft; 43. Rotating ring; 44. Snap ring; 45. Telescopic rod; 46. Pull rod; 47. Limiting ring; 48. Limiting groove; 49. First arc groove; 491. Clamping bolt; 492. Clamping groove; 5. Locking piece; 51. Sleeve; 52. Spring; 53. Second arc groove; 54. Locking groove; 55. Sliding groove; 56. Sliding block; 57. Sliding groove; 6. Heat sink; 61. Heat dissipation silicone; 62. Block; 63. Pull ring. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0028] Example 1

[0029] Reference Figure 1-6 , which is the first embodiment of the utility model, provides a PCB shielding cover, the PCB shielding cover comprises a mainboard 1, an electronic component 2 mounted on the surface of the mainboard 1 and a shielding cover 3, the four corners of the shielding cover 3 are all equipped with clamping parts 4, the surface of the mainboard 1 is equipped with a locking part 5, the locking part 5 corresponds to the clamping part 4, and the clamping part 4 is located inside the locking part 5, and the clamping part 4 is fixed at a position in the middle and lower part of the shielding cover 3;

[0030] The clamping member 4 includes a connecting rod 41 fixed at the four corners of the shielding cover 3, one end of the connecting rod 41 and the end away from the shielding cover 3 is movably sleeved with a positioning shaft 42, the surface of the positioning shaft 42 is movably sleeved with a rotating ring 43, the surface of the rotating ring 43 is movably sleeved with a clamping ring 44, the surface of the clamping ring 44 is provided with a first arc groove 49, the surface of the rotating ring 43 is fixedly connected with a telescopic rod 45, the output end of the telescopic rod 45 is rotatably connected with a pull rod 46, the pull rod 46 is located inside the first arc groove 49, and is movably connected thereto, the pull rod 46 is a C-shaped structure, one end of which is rotatably connected to the telescopic rod 45 , and a hole is opened on the surface of the snap ring 44 and at the top of the first arc groove 49, the other end of the pull rod 46 is located inside the hole and is movably connected to it, which can facilitate the positioning of the telescopic rod 45, and the first arc groove 49 is set in a semicircular shape, which can conveniently drive the rotating ring 43 to rotate to achieve the purpose of positioning, the top diameter of the positioning shaft 42 is larger than the diameter of the inner cavity of the connecting rod 41, so that the positioning shaft 42 can achieve the purpose of positioning, and the bottom of the positioning shaft 42 penetrates the rotating ring 43 and extends to the bottom side of the inside of the snap ring 44, and is rotatably connected to it, so as to achieve the purpose of stabilizing the rotating ring 43;

[0031] The locking member 5 includes a sleeve 51 fixed on the surface of the main board 1, a spring 52 is installed inside the sleeve 51, a second arc groove 53 and a locking groove 54 are opened on the surface of the sleeve 51, the locking groove 54 and the second arc groove 53 are vertically arranged, and the two are connected, the retaining ring 44 is located inside the sleeve 51, and is located on the top of the spring 52, and is movably connected with it, the first arc groove 49 and the second arc groove 53 correspond to each other, and one end of the second arc groove 53 can facilitate the driving rod 46 to drive the telescopic rod 45 to perform a stretching operation, so that it passes through the sleeve 51 through the second arc groove 53, and drives the rotating ring 43 to rotate, so that the telescopic rod 45 is located inside the locking groove 54, so as to achieve the purpose of connecting the clamping member 4 with the locking member 5.

[0032] The clamping member 4 also includes a limiting ring 47 fixed on the surface of the rotating ring 43. The limiting ring 47 is provided with two groups. A limiting groove 48 is provided inside the clamping ring 44. The limiting ring 47 is located inside the limiting groove 48 and is movably connected thereto, thereby ensuring the stability of the rotating ring 43 during rotation and providing support force for the rotating ring 43.

[0033] The telescopic rod 45 is located on the inner side of the two sets of limit rings 47. Both sides of the telescopic rod 45 are fixedly connected with a bolt 491. The inner side of the clamping ring 44 and both ends of the first arc groove 49 are provided with a clamping groove 492. The bolt 491 is located inside the clamping groove 492 and is movably connected thereto. The bolt 491 is a connecting rod and rubber ball structure. The diameter of the rubber ball is larger than that of the connecting rod. The purpose of positioning the telescopic rod 45 is achieved by relying on the increased friction between the rubber ball and the inner side of the clamping groove 492.

[0034] The locking member 5 also includes a slider 56 installed on the outside of the top of the spring 52. A slide groove 57 is provided inside the sleeve 51. The slider 56 is located inside the slide groove 57 and is movably connected thereto. The slider 56 and the slide groove 57 are each provided with two groups, and are staggered with the slide groove 55, the second arc groove 53 and the locking groove 54, which can ensure the stability of the spring 52 during extrusion or stretching, and the bottom of the spring 52 extends to the inside of the main board 1, which can maximize the compression of the spring 52 to facilitate the correspondence between the first arc groove 49 and the second arc groove 53.

[0035] A sliding groove 55 is provided on the surface of the sleeve 51, and the sliding groove 55 is located at one end away from the second arc groove 53. The connecting rod 41 is located inside the sliding groove 55 and is movably connected thereto. The diameters of the two are consistent, which can facilitate the installation and removal of the shielding cover 3. A heat sink 6 is installed on the inner side of the shielding cover 3.

[0036] During use, the shielding cover 3 is installed on the surface of the mainboard 1 so that the connecting rods 41 at the four corners are located inside the sliding groove 55, and the snap ring 44 is located inside the sleeve 51, and the shielding cover 3 is pressed to apply pressure to the spring 52 through the snap ring 44, so that the spring 52 is squeezed and slowly descends along the inside of the sleeve 51 until the squeezing degree of the spring 52 is maximized. At this time, the first arc groove 49 corresponds to the second arc groove 53, and then the pull rod 46 is pulled through the gap between the two to drive the telescopic rod 45 to extend to the outside of the second arc groove 53, and the telescopic rod 45 is rotated to drive the rotating ring 43 to rotate along the inside of the snap ring 44, and the telescopic rod 45 moves along the inner side of the second arc groove 53 toward the locking groove 54. At this time, The pressure of the spring 52 will be partially canceled, and the deformation will be restored to move the retaining ring 44 upward until the top of the telescopic rod 45 is tightly fitted with the inner side of the locking groove 54, and then the pull rod 46 is rotated to make one end of it rotate along the surface of the telescopic rod 45, and the other end of it corresponds to the hole on the surface of the retaining ring 44, and the telescopic rod 45 is pushed to drive one end of the pull rod 46 to be completely immersed in the inside of the hole, and the installation of the shielding cover 3 can be completed. When repairing the electronic component 2, the operation can be completed by the opposite operation, so that the shielding cover 3 can be quickly installed and disassembled, and the problem of destroying part of the structure of the shielding cover 3 when repairing the electronic component 2, which will reduce the shielding effect, is further avoided, and the repair of the electronic component 2 is further facilitated.

[0037] Example 2

[0038] Reference Figure 1-7 , which is the second embodiment of the utility model, and this embodiment is different from the first embodiment in that:

[0039] The heat sink 6 includes a heat dissipation silicone rubber 61 installed on the inner side of the shielding cover 3. Both sides of the top of the heat dissipation silicone rubber 61 are fixedly connected with a clamping block 62. The side of the clamping block 62 is set as an inclined surface, and a partial groove is reserved at its bottom. A clamping groove is opened on the inner side of the shielding cover 3, which can be conveniently clamped with the inner side of the shielding cover 3. The heat dissipation silicone rubber 61 can cover the entire surface of the circuit board, thereby protecting the circuit board and the electronic components 2, and can also reduce the influence of external impurities and process precipitation, thereby extending the service life of the electronic components 2, and can also prevent dust and strong ultraviolet radiation.

[0040] Pull rings 63 are installed on both sides of the bottom of the heat dissipation silicone 61. The pull rings 63 are arranged in a semicircular shape to facilitate the use of fingers.

[0041] The bottom of the heat dissipation silicone 61 is provided with equidistantly arranged straight grooves, and the top of the heat dissipation silicone 61 is provided with equidistantly arranged heat dissipation holes. The straight grooves are connected with the heat dissipation holes to form a multi-stage heat dissipation system, which improves the heat dissipation efficiency. The heat dissipation holes can accelerate the dissipation of heat, and the straight grooves can evenly distribute the heat to the entire shielding cover 3, thereby effectively improving the heat dissipation efficiency. Since the heat dissipation silicone 61 has excellent heat dissipation performance, the heat on the electronic component 2 can be transferred to the shielding cover 3, and the combination of the straight grooves and the heat dissipation holes can accelerate the heat dissipation of the electronic component 2 and improve the heat dissipation effect of the entire circuit system.

[0042] The heat dissipation holes and the straight grooves are connected to form a multi-level heat dissipation system, which improves the heat dissipation efficiency. The heat dissipation holes can accelerate the dissipation of heat, and the straight grooves can evenly distribute the heat to the entire shielding cover 3, thereby effectively improving the heat dissipation efficiency. The conductive property of the heat dissipation silicone 61 can enhance the electromagnetic shielding effect of the shielding cover 3. The heat dissipation holes and the straight grooves are connected to the shielding cover 3 to form a complete electromagnetic shielding system, which can effectively reduce external electromagnetic interference and radio frequency interference. The design of the heat dissipation holes and the straight grooves can also make the shielding cover 3 itself waterproof. Because the heat dissipation holes and the straight grooves are connected, moisture cannot be retained inside the shielding cover 3, which can effectively prevent moisture from entering the circuit board to cause short circuits and circuit board failures.

[0043] The remaining structures are the same as those of Example 1.

[0044] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A shielding cover for a PCB, comprising a mainboard (1), an electronic component (2) mounted on the surface of the mainboard (1), and a shielding cover (3), characterized in that: The four corners of the shielding cover (3) are all equipped with snap-fitting parts (4), and the surface of the main board (1) is equipped with a locking part (5); The clamping member (4) comprises a connecting rod (41) fixed at the four corners of the shielding cover (3); one end of the connecting rod (41) and the end away from the shielding cover (3) is movably sleeved with a positioning shaft (42); the surface of the positioning shaft (42) is movably sleeved with a rotating ring (43); the surface of the rotating ring (43) is movably sleeved with a clamping ring (44); a first arc-shaped groove (49) is provided on the surface of the clamping ring (44); a telescopic rod (45) is fixedly connected to the surface of the rotating ring (43); the output end of the telescopic rod (45) is rotatably connected with a pull rod (46); the pull rod (46) is located inside the first arc-shaped groove (49) and is movably connected thereto; The locking member (5) comprises a sleeve (51) fixed on the surface of the main board (1), a spring (52) is installed inside the sleeve (51), a second arc groove (53) and a locking groove (54) are opened on the surface of the sleeve (51), the locking groove (54) and the second arc groove (53) are vertically arranged, and the two are connected, and the snap ring (44) is located inside the sleeve (51) and at the top of the spring (52), and is movably connected with it.

2. The PCB shielding cover according to claim 1, characterized in that: The clamping member (4) further comprises a limiting ring (47) fixed on the surface of the rotating ring (43), wherein the limiting ring (47) is provided with two groups, a limiting groove (48) is provided inside the clamping ring (44), and the limiting ring (47) is located inside the limiting groove (48) and is movably connected thereto.

3. The PCB shielding cover according to claim 2, characterized in that: The telescopic rod (45) is located on the inner side of the two groups of limit rings (47), and both sides of the telescopic rod (45) are fixedly connected with a clamping bolt (491). The inner side of the clamping ring (44) and both ends of the first arc groove (49) are provided with a clamping groove (492), and the clamping bolt (491) is located inside the clamping groove (492) and is movably connected thereto.

4. The PCB shielding cover according to claim 1, characterized in that: The locking member (5) further comprises a slider (56) mounted on the outer side of the top of the spring (52); a slide groove (57) is provided inside the sleeve (51); the slider (56) is located inside the slide groove (57) and is movably connected thereto.

5. The PCB shielding cover according to claim 4, characterized in that: A sliding groove (55) is provided on the surface of the sleeve (51), and the sliding groove (55) is located at an end away from the second arc groove (53). The connecting rod (41) is located inside the sliding groove (55) and is movably connected thereto. A heat sink (6) is installed on the inner side of the shielding cover (3).

6. The PCB shielding cover according to claim 5, characterized in that: The heat sink (6) comprises heat dissipation silica gel (61) installed on the inner side of the shielding cover (3), and blocks (62) are fixedly connected to both sides of the top of the heat dissipation silica gel (61).

7. The PCB shielding cover according to claim 6, characterized in that: Pull rings (63) are installed on both sides of the bottom of the heat dissipating silica gel (61), and the pull rings (63) are arranged in a semicircular shape.

8. The PCB shielding cover according to claim 7, characterized in that: The bottom of the heat dissipation silica gel (61) is provided with straight grooves arranged at equal intervals, and the top of the heat dissipation silica gel (61) is provided with heat dissipation holes arranged at equal intervals, and the straight grooves are communicated with the heat dissipation holes.

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