Shielding structure and motor

Abstract

The utility model discloses a shielding structure and a motor, and relates to the technical field of motors. The shielding structure comprises a first metal shell, a second metal shell, a plastic light guide ring, a circuit board and a plurality of conductive elastic sheets, the plastic light guide ring is arranged between the first metal shell and the second metal shell; the circuit board is arranged in the plastic light guide ring and is electrically connected with the second metal shell; the plurality of conductive elastic sheets are distributed along the circumferential direction of the plastic light guide ring, the conductive elastic sheets sleeve the plastic light guide ring, each conductive elastic sheet comprises a first elastic arm, a connecting part and a second elastic arm which are connected in sequence, the first elastic arm is compressed between the first metal shell and the plastic light guide ring and is in contact and electric connection with the first metal shell, and the second elastic arm is compressed between the second metal shell and the plastic light guide ring. And the second elastic arm is compressed between the circuit board and the plastic light guide ring and is electrically connected with the circuit board in a contact manner. According to the shielding structure provided by the invention, the structural stability of the shielding structure can be improved, an approximately closed shielding cavity can be formed, and the electromagnetic compatibility of the motor is improved.

Description

Technical Field

[0001] This application relates to the field of motor technology, and in particular to a shielding structure and a motor. Background Technology

[0002] To meet the electromagnetic compatibility certification requirements of power electronic equipment, it is necessary to achieve electromagnetic and electrical performance design of small-volume structures and single-board PCBs (printed circuit boards).

[0003] However, in existing motor structures, the overlap structure between the single-board PCB and the housing is prone to deformation, resulting in unstable overlap. Utility Model Content

[0004] This application provides a shielding structure and a motor to improve the structural stability of the shielding structure.

[0005] This application provides a shielding structure, including:

[0006] The housing assembly includes a first metal housing and a second metal housing disposed opposite to each other;

[0007] A plastic light guide ring is disposed between the first metal housing and the second metal housing, and the plastic light guide ring has an accommodating cavity inside;

[0008] A circuit board is disposed in the accommodating cavity and electrically connected to the second metal housing;

[0009] Multiple conductive springs are distributed circumferentially along the plastic light guide ring. The conductive springs are sleeved on the side of the plastic light guide ring opposite to the second metal housing. Each conductive spring includes a first elastic arm, a connecting part, and a second elastic arm connected in sequence. The first elastic arm is compressed between the first metal housing and the plastic light guide ring and is electrically connected to the first metal housing. The second elastic arm is compressed between the circuit board and the plastic light guide ring and is electrically connected to the circuit board.

[0010] In some possible implementations, the compression of the first elastic arm is 0.15 mm to 0.25 mm;

[0011] And / or, the compression of the second elastic arm is 0.15 mm to 0.25 mm.

[0012] In some possible implementations, the plastic light guide ring includes a plurality of edge structures connected end to end in sequence, and each edge structure is fitted with at least two of the conductive spring sheets;

[0013] On the same edge structure, the distance n between two adjacent conductive spring pieces is set to n < 10 mm.

[0014] In some possible implementations, two conductive springs are fitted onto the same edge structure.

[0015] In some possible implementations, the plastic light guide ring has a first limiting groove on the side facing the first metal housing, and the first elastic arm is circumferentially limited and disposed in the first limiting groove. The first elastic arm protrudes relative to the side of the first limiting groove facing the first metal housing and abuts against the first metal housing.

[0016] And / or, the plastic light guide ring has a second limiting groove on the side facing the circuit board, the second elastic arm is circumferentially limited in the second limiting groove, the second elastic arm protrudes from the side facing the circuit board relative to the second limiting groove and abuts against the circuit board.

[0017] In some possible implementations, the plastic light guide ring protrudes from the side facing the first metal housing and is provided with a first positioning post, and the first elastic arm is provided with a first positioning hole adapted to the first positioning post, and the first positioning post is positioned and inserted into the first positioning hole.

[0018] And / or, the plastic light guide ring has a second positioning post protruding from one side toward the circuit board, and the second elastic arm has a second positioning hole adapted to the second positioning post, and the second positioning post is positioned and inserted into the second positioning hole.

[0019] In some possible implementations, the plastic light guide ring has a second positioning post protruding from one side toward the circuit board. The second positioning post is located on the side of the circuit board away from the second metal housing, and the side of the second positioning post away from the first metal housing is configured as an inclined surface.

[0020] The inclined surface gradually slopes away from the end away from the circuit board to the end closer to the circuit board, moving away from the side away from the first metal casing.

[0021] In some possible implementations, the plastic light guide ring includes a light guide ring body and an annular first limiting edge and a second limiting edge;

[0022] The first limiting edge protrudes from the side of the light guide ring body facing the first metal housing, and the first limiting edge is inserted into the first metal housing and fits against the inner wall of the peripheral side of the first metal housing;

[0023] The second limiting edge protrudes from the side of the light guide ring body facing the second metal housing, and the second limiting edge is inserted into the second metal housing and fits against the inner wall of the periphery of the second metal housing.

[0024] In some possible implementations, the shielding structure further includes a locking element mechanically connected between the circuit board and the second metal housing, and the locking element is electrically connected to both the circuit board and the second metal housing.

[0025] In addition, this application also provides an electric motor, including the shielding structure provided in the above embodiments.

[0026] The beneficial effects of this application are as follows: In the shielding structure provided in this application embodiment, the first elastic arm is clamped between the first metal shell and the plastic light guide ring, and the second elastic arm is clamped between the plastic light guide ring and the circuit board. This means that both the first and second elastic arms are subjected to clamping forces, and the structures on both sides of the conductive spring sheet are subjected to clamping forces of equal magnitude. This ensures that the forces on both sides of the conductive spring sheet are uniform, preventing deformation of the connection due to uneven force. Furthermore, it ensures stable contact between the first elastic arm and the first metal shell, forming a stable and reliable electrical connection, and also ensures stable contact between the second elastic arm and the circuit board, forming a stable and reliable electrical connection. This achieves effective overlap between the circuit board and the shell assembly, improving the stability of the overlap, reducing grounding impedance, and improving grounding reliability. In addition, in the shielding structure provided in this application, multiple conductive spring sheets are distributed circumferentially along the plastic light guide ring. This allows the multiple conductive spring sheets, together with the shell assembly and the circuit board, to form a nearly closed shielding cavity, improving the electromagnetic compatibility performance of the motor and enhancing anti-interference capabilities. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A three-dimensional structural schematic diagram of the shielding structure in some embodiments is shown;

[0029] Figure 2 Exploded structural diagrams of the shielding structure in some embodiments are shown;

[0030] Figure 3 A top view of the shielding structure is shown in some embodiments;

[0031] Figure 4 Cross-sectional structural diagrams of the shielding structure in some embodiments are shown;

[0032] Figure 5 It shows Figure 4 A magnified schematic diagram of part A in the middle section;

[0033] Figure 6 A partial cross-sectional schematic diagram of the conductive spring mounting structure is shown in some other embodiments;

[0034] Figure 7 Schematic diagrams of the conductive spring sheet in some embodiments are shown.

[0035] Explanation of key component symbols:

[0036] 1000 - Shielding structure;

[0037] 100 - Housing assembly; 110 - First metal housing; 120 - Second metal housing;

[0038] 200-Plastic light guide ring; 201-Accommodating cavity; 202-Edge structure; 210-Light guide ring body; 220-First limiting edge; 221-First limiting groove; 222-First positioning post; 223-Second limiting groove; 224-Second positioning post; 2241-Chamfered surface; 230-Second limiting edge;

[0039] 300 - Circuit Board;

[0040] 400 - Conductive spring; 410 - First elastic arm; 411 - First positioning hole; 420 - Second elastic arm; 421 - Second positioning hole; 430 - Connecting part;

[0041] 500 - Locking component. Detailed Implementation

[0042] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0043] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0045] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0046] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0047] like Figures 1 to 4 , Figure 7 As shown, the embodiment provides a shielding structure 1000 that can be applied to a motor.

[0048] In some embodiments, the shielding structure 1000 includes a housing assembly 100, a plastic light guide ring 200, a circuit board 300, and a plurality of conductive springs 400.

[0049] The housing assembly 100 includes a first metal housing 110 and a second metal housing 120 disposed opposite to each other. A plastic light guide ring 200 may be disposed between the first metal housing 110 and the second metal housing 120. In this embodiment, the plastic light guide ring 200 may have a ring-shaped structure, and its interior may be configured with a receiving cavity 201. A circuit board 300 may be disposed in the receiving cavity 201 of the plastic light guide ring 200 and electrically connected to the second metal housing 120. It is understood that the circuit board 300 may integrate an indicator light for displaying the motor's operating status, and the light generated by the indicator light can be transmitted outward through the plastic light guide ring 200 for the operator to view.

[0050] In this embodiment, multiple conductive springs 400 can be distributed circumferentially along the plastic light guide ring 200. The conductive springs 400 can be sleeved on the side of the plastic light guide ring 200 facing away from the second metal housing 120. In some embodiments, the conductive springs 400 may include a first elastic arm 410, a connecting portion 430, and a second elastic arm 420 connected in sequence, with the first elastic arm 410 and the second elastic arm 420 arranged opposite to each other. The first elastic arm 410 can be disposed between the first metal housing 110 and the plastic light guide ring 200, and the first elastic arm 410 abuts against the first metal housing 110 to form a contact electrical connection. The second elastic arm 420 can be disposed between the circuit board 300 and the plastic light guide ring 200, and the second elastic arm 420 abuts against the circuit board 300 to form an electrical connection. Thus, the circuit board 300 and the first metal housing 110 can be electrically connected through the conductive springs 400. In this embodiment, the side of the circuit board 300 may be provided with a bright copper area opposite to the second elastic arm 420, and the second elastic arm 420 may abut against the bright copper area at the opposite position to form a contact electrical connection.

[0051] The shielding structure 1000 provided in this embodiment includes a first elastic arm 410 of the conductive spring 400 sandwiched between the first metal housing 110 and the plastic light guide ring 200, and a second elastic arm 420 sandwiched between the plastic light guide ring 200 and the circuit board 300. Both the first elastic arm 410 and the second elastic arm 420 are subjected to clamping forces, and the structures on both sides of the conductive spring 400 are subjected to clamping forces of equal magnitude. This ensures uniform force on both sides of the conductive spring 400, preventing deformation of the connection portion 430 due to uneven force. Furthermore, it ensures stable contact between the first elastic arm 410 and the first metal housing 110, forming a stable and reliable electrical connection, and also ensures stable contact between the second elastic arm 420 and the circuit board 300, forming a stable and reliable electrical connection. This achieves effective connection between the circuit board 300 and the housing assembly 100, reducing grounding impedance and improving grounding reliability.

[0052] Furthermore, in this application, multiple conductive springs 400 are distributed circumferentially along the plastic light guide ring 200, meaning that multiple conductive springs 400 can be distributed around the periphery of the circuit board 300. This allows the multiple conductive springs 400 to cooperate with the housing assembly 100 and the circuit board 300 to form a nearly closed shielding cavity, improving electromagnetic compatibility performance and enhancing anti-interference capabilities.

[0053] like Figures 1 to 4 As shown, in some embodiments, the plastic light guide ring 200 may be made of plastic, that is, the plastic light guide ring 200 itself is non-conductive.

[0054] In some embodiments, the plastic light guide ring 200 may have a quadrilateral ring structure. Accordingly, the plastic light guide ring 200 may include four edge structures 202 connected end to end in sequence. In some embodiments, each edge structure 202 is provided with two conductive springs 400.

[0055] In other embodiments, each edge structure 202 may be provided with one, three, four or any other number of conductive springs 400.

[0056] In other embodiments, the plastic light guide ring 200 may also be in the form of a pentagon or hexagon, and accordingly, the plastic light guide ring 200 may include five or six edge structures 202.

[0057] In some embodiments, two conductive springs 400 located on the same edge structure 202 can be symmetrically arranged about the central axis of the edge structure 202. Furthermore, the distance n between two adjacent conductive springs 400 on the same edge structure 202 can be set to n < 10 mm. This allows for a smaller distance between the two conductive springs 400, improving the electromagnetic shielding effect of the plastic light guide ring 200, effectively shielding the circuit board 300 from interference from external electric, magnetic, or electromagnetic fields. Simultaneously, it can also shield the influence of the motor's internal electromagnetic field on the external environment, extending the motor's service life and reducing subsequent maintenance costs. For example, in some embodiments, the distance n between two adjacent conductive springs 400 on the same edge structure 202 can be set to any other value of 0, 1mm, 1.5mm, 2.1mm, 2.6mm, 3mm, 3.5mm, 4.2mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.2mm, 6.8mm, 7.5mm, 8mm, 8.2mm, 8.5mm, 9mm, 9.5mm, 9.8mm or less than 10mm.

[0058] like Figure 2 , Figure 4 and Figure 5 As shown, in some embodiments, the plastic light guide ring 200 may include a light guide ring body 210, a first limiting edge 220, and a second limiting edge 230, wherein the light guide ring body 210, the first limiting edge 220, and the second limiting edge 230 are all annular structures. The first limiting edge 220 may protrude from the side of the light guide ring body 210 facing the first metal housing 110. The second limiting edge 230 may protrude from the side of the light guide ring body 210 facing the second metal housing 120. Correspondingly, each edge structure 202 may include a section of the light guide ring body 210, the first limiting edge 220, and the second limiting edge 230.

[0059] In this embodiment, the first limiting edge 220 can be inserted into the first metal housing 110. The side of the first limiting edge 220 facing away from the circuit board 300 can be fitted against the inner wall of the periphery of the first metal housing 110. This allows for the positioning and installation of the plastic light guide ring 200 with the first metal housing 110, and also improves assembly efficiency.

[0060] The second limiting edge 230 can be inserted into the second metal housing 120, and the side of the second limiting edge 230 facing away from the circuit board 300 can fit against the inner wall of the periphery of the second metal housing 120. Thus, the positioning and installation between the plastic light guide ring 200 and the second metal housing 120 can be realized, and the assembly efficiency can also be improved.

[0061] In some embodiments, the conductive spring 400 can be sleeved on the side of the first limiting edge 220 opposite to the second limiting edge 230. That is, the first elastic arm 410 and the second elastic arm 420 can be clamped on opposite sides of the first limiting edge 220, and the connecting portion 430 can abut against the end face of the first limiting edge 220 opposite to the second limiting edge 230. Thus, the first limiting edge 220 can restrict the movement of the conductive spring 400 in a direction perpendicular to the first limiting edge 220, and the first limiting edge 220 can guide the conductive spring 400 within the first limiting edge 220 of its own edge structure 202.

[0062] In some embodiments, the conductive spring 400 may be made of a metal sheet and may have good conductivity and ductility.

[0063] In this embodiment, the first elastic arm 410 is compressibly disposed between the first limiting edge 220 and the first metal housing 110. In some embodiments, when the first elastic arm 410 is sandwiched between the first limiting edge 220 and the first metal housing 110, the compression amount of the first elastic arm 410 can be set to 0.15mm to 0.25mm to ensure stable contact and electrical connection between the first elastic arm 410 and the first metal housing 110, and to prevent damage to the first elastic arm 410 due to excessive deformation. For example, when the first elastic arm 410 is sandwiched between the first limiting edge 220 and the first metal housing 110, the compression amount of the first elastic arm 410 can be set to 0.15mm, 0.18mm, 0.19mm, 0.21mm, 0.23mm, 0.25mm, or any other value from 0.15mm to 0.25mm.

[0064] In this embodiment, the second elastic arm 420 is compressibly disposed between the first limiting edge 220 and the circuit board 300. In some embodiments, when the second elastic arm 420 is sandwiched between the first limiting edge 220 and the circuit board 300, the compression amount of the second elastic arm 420 can be set to 0.15mm to 0.25mm to ensure stable contact and electrical connection between the second elastic arm 420 and the circuit board 300, and to prevent damage to the second elastic arm 420 due to excessive compression. For example, when the second elastic arm 420 is sandwiched between the first limiting edge 220 and the circuit board 300, the compression amount of the second elastic arm 420 can be set to 0.15mm, 0.18mm, 0.19mm, 0.21mm, 0.23mm, 0.25mm, or any other value from 0.15mm to 0.25mm.

[0065] In some embodiments, a first limiting groove 221 may be formed on the side of the first limiting edge 220 facing the first metal housing 110, and a first elastic arm 410 may be inserted into the first limiting groove 221. The first elastic arm 410 may be positioned within the first limiting groove 221 along the circumferential direction of the plastic light guide ring 200. This prevents the conductive spring 400 from moving along the circumferential direction of the plastic light guide ring 200. Furthermore, the first elastic arm 410 may protrude from the opening of the first limiting groove 221 facing the first metal housing 110 to abut against the first metal housing 110 and form a stable and reliable electrical connection.

[0066] like Figure 2 , Figure 4 and Figure 6 As shown, in some embodiments, a second limiting groove 223 may be formed on the side of the first limiting edge 220 facing the circuit board 300. The second elastic arm 420 can be inserted into the second limiting groove 223 and is located within the second limiting groove 223 at the upper circumferential limit of the plastic light guide ring 200. This prevents the conductive spring 400 from moving circumferentially along the plastic light guide ring 200. In addition, the second elastic arm 420 may protrude relative to the opening of the second limiting groove 223 facing the circuit board 300 so as to abut against the circuit board 300 and form a stable and reliable electrical connection.

[0067] like Figure 2 , Figures 4 to 6 As shown, in some other embodiments, a first limiting groove 221 may be formed on the side of the first limiting edge 220 facing the first metal housing 110, and a first elastic arm 410 may be inserted into the first limiting groove 221, with the upper limit of the plastic light guide ring 200 in the circumferential direction located in the first limiting groove 221. A second limiting groove 223 may be formed on the side of the first limiting edge 220 facing the circuit board 300, and a second elastic arm 420 may be inserted into the second limiting groove 223, with the upper limit of the plastic light guide ring 200 in the circumferential direction located in the second limiting groove 223.

[0068] like Figure 2 , Figure 4 and Figure 5 As shown, in some embodiments, a second positioning post 224 may protrude from the side of the first limiting edge 220 facing the circuit board 300. The second positioning post 224 is located on the side of the circuit board 300 away from the second metal housing 120. A second positioning hole 421 adapted to the second positioning post 224 may be formed on the second elastic arm 420. The second positioning post 224 can be positioned and inserted into the second positioning hole 421. Specifically, when the second positioning post 224 is inserted into the second positioning hole 421, the peripheral surface of the second positioning post 224 may be in contact with the inner wall of the second positioning hole 421 or there may be a small gap, which can prevent the second elastic arm 420 from moving arbitrarily relative to the first limiting edge 220.

[0069] like Figure 2 , Figure 4 and Figure 6 As shown, in some embodiments, a first positioning post 222 may protrude from the side of the first limiting edge 220 facing the first metal housing 110. A first positioning hole 411 adapted to the first positioning post 222 may be formed on the first elastic arm 410. The first positioning post 222 can be positioned and inserted into the first positioning hole 411. Specifically, when the first positioning post 222 is inserted into the first positioning hole 411, the peripheral surface of the first positioning post 222 may be in contact with the inner wall of the first positioning hole 411 or there may be a small gap, which can prevent the first elastic arm 410 from moving arbitrarily relative to the first limiting edge 220.

[0070] like Figure 2 , Figures 4 to 6 As shown, in some embodiments, a second positioning post 224 may protrude from the side of the first limiting edge 220 facing the circuit board 300. A second positioning hole 421 adapted to the second positioning post 224 may be formed on the second elastic arm 420. The second positioning post 224 can be positioned and inserted into the second positioning hole 421. A first positioning post 222 may protrude from the side of the first limiting edge 220 facing the first metal housing 110. A first positioning hole 411 adapted to the first positioning post 222 may be formed on the first elastic arm 410. The first positioning post 222 can be positioned and inserted into the first positioning hole 411.

[0071] In some embodiments, the surface of the second positioning post 224 facing away from the first metal housing 110 can be configured as a slope 2241. Specifically, the slope 2241 can gradually slope away from the first elastic arm 410 from the end away from the circuit board 300 to the end near the circuit board 300. Thus, when the conductive spring 400 is assembled onto the first limiting edge 220, the slope 2241 can provide a corresponding guiding function for the second elastic arm 420, so that the conductive spring 400 can be smoothly assembled onto the first limiting edge 220.

[0072] like Figure 1 and Figure 2 As shown, in some embodiments, the first metal housing 110 and the second metal housing 120 can be fixedly connected by screws, and the plastic light guide ring 200 can be fixedly clamped between the first metal housing 110 and the second metal housing 120.

[0073] In some embodiments, the shielding structure 1000 further includes a locking member 500, which is mechanically connected between the circuit board 300 and the second metal housing 120, thereby fixing the circuit board 300 to the housing assembly 100 and preventing the circuit board 300 from moving freely relative to the housing assembly 100. Additionally, the locking member 500 can be electrically connected to both the circuit board 300 and the second metal housing 120, meaning the circuit board 300 can be electrically connected to the second metal housing 120 via the locking member 500. In some embodiments, the locking member 500 can be a metal screw, achieving both mechanical and electrical connections between the circuit board 300 and the second metal housing 120, thus simplifying the shielding structure 1000.

[0074] In summary, in the shielding structure 1000 provided in this application embodiment, the circuit board 300 and the first metal housing 110 can be connected by multiple conductive springs 400, which increases the overlap area between the circuit board 300 and the first metal housing 110. Simultaneously, it also ensures that the conductive springs 400 are subjected to uniform force on both sides, reducing the possibility of deformation. Furthermore, it reduces the grounding return reference path between the internal circuitry of the circuit board 300 and the housing assembly 100, decreasing the overall grounding impedance of the motor. This effectively reduces electromagnetic noise generated by the internal circuitry of the circuit board 300 and improves the motor's immunity to external electrostatic discharge, electrical fast transient pulses, surges, and other transient pulses.

[0075] In addition, multiple conductive springs 400 can cooperate with the housing assembly 100 and the circuit board 300 to form a nearly closed shielding structure 1000, which can effectively suppress electromagnetic radiation noise generated by the circuit inside the circuit board 300, and also reduce the interference of external electromagnetic field radiation, pulse and other signals on the internal circuit of the circuit board 300.

[0076] The embodiment also provides a motor, which may include a motor body and a shielding structure 1000 provided in the embodiment.

[0077] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0078] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A shielding structure, characterized in that, include: The housing assembly includes a first metal housing and a second metal housing disposed opposite to each other; A plastic light guide ring is disposed between the first metal housing and the second metal housing, and the plastic light guide ring has an accommodating cavity inside; A circuit board is disposed in the accommodating cavity and electrically connected to the second metal housing; Multiple conductive springs are distributed circumferentially along the plastic light guide ring. The conductive springs are sleeved on the side of the plastic light guide ring opposite to the second metal housing. Each conductive spring includes a first elastic arm, a connecting part, and a second elastic arm connected in sequence. The first elastic arm is compressed between the first metal housing and the plastic light guide ring and is electrically connected to the first metal housing. The second elastic arm is compressed between the circuit board and the plastic light guide ring and is electrically connected to the circuit board.

2. The shielding structure according to claim 1, characterized in that, The compression of the first elastic arm is 0.15 mm to 0.25 mm; And / or, the compression of the second elastic arm is 0.15 mm to 0.25 mm.

3. The shielding structure according to claim 1, characterized in that, The plastic light guide ring includes multiple edge structures connected end to end in sequence, and each edge structure is fitted with at least two conductive spring sheets. On the same edge structure, the distance n between two adjacent conductive spring pieces is set to n < 10 mm.

4. The shielding structure according to claim 3, characterized in that, Two conductive spring sheets are fitted onto the same edge structure.

5. The shielding structure according to any one of claims 1 to 4, characterized in that, The plastic light guide ring has a first limiting groove on the side facing the first metal shell. The first elastic arm is circumferentially limited and disposed in the first limiting groove. The first elastic arm protrudes relative to the side of the first limiting groove facing the first metal shell and abuts against the first metal shell. And / or, the plastic light guide ring has a second limiting groove on the side facing the circuit board, the second elastic arm is circumferentially limited in the second limiting groove, the second elastic arm protrudes from the side facing the circuit board relative to the second limiting groove and abuts against the circuit board.

6. The shielding structure according to any one of claims 1 to 4, characterized in that, The plastic light guide ring has a first positioning post protruding from the side facing the first metal shell. The first elastic arm has a first positioning hole that matches the first positioning post, and the first positioning post is positioned and inserted into the first positioning hole. And / or, the plastic light guide ring has a second positioning post protruding from one side toward the circuit board, and the second elastic arm has a second positioning hole adapted to the second positioning post, and the second positioning post is positioned and inserted into the second positioning hole.

7. The shielding structure according to claim 6, characterized in that, The plastic light guide ring has a second positioning post protruding from one side of the circuit board. The second positioning post is located on the side of the circuit board away from the second metal shell, and the side of the second positioning post away from the first metal shell is configured as an inclined surface. The inclined surface gradually slopes away from the end away from the circuit board to the end closer to the circuit board, moving away from the side away from the first metal casing.

8. The shielding structure according to any one of claims 1 to 4, characterized in that, The plastic light guide ring includes a light guide ring body, and an annular first limiting edge and a second limiting edge; The first limiting edge protrudes from the side of the light guide ring body facing the first metal housing, and the first limiting edge is inserted into the first metal housing and fits against the inner peripheral wall of the first metal housing. The second limiting edge protrudes from the side of the light guide ring body facing the second metal housing, and the second limiting edge is inserted into the second metal housing and fits against the inner wall of the periphery of the second metal housing.

9. The shielding structure according to any one of claims 1 to 4, characterized in that, The shielding structure also includes a locking element, which is mechanically connected between the circuit board and the second metal housing, and is electrically connected to both the circuit board and the second metal housing.

10. An electric motor, characterized in that, Includes the shielding structure as described in any one of claims 1 to 9.

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