Grounding elastic sheet and electronic equipment

Abstract

The utility model discloses a grounding elastic sheet and electronic equipment, and belongs to the technical field of electronic equipment. The grounding elastic piece is used for electrically connecting a shell and a circuit board of the electronic equipment, the grounding elastic piece comprises a connecting part and a clamping part which are connected, the edge of the connecting part extends to form the clamping part, the connecting part is used for connecting the shell, the clamping part comprises a connecting arm and at least one elastic arm, and the connecting arm and the elastic arm are matched to form a clamping groove. The clamping groove is used for being clamped and matched with a circuit board. The electronic equipment comprises a shell, a circuit board, a fastening piece and the grounding elastic piece, the connecting part is connected with the shell through the fastening piece, and the clamping part is clamped and matched with the circuit board through the clamping groove.

Description

Technical Field

[0001] The present application belongs to the technical field of electronic equipment, and specifically relates to a grounding spring and electronic equipment. Background Art

[0002] In electronic equipment, a grounding spring is usually required between two components that need to be electrically connected to achieve electrical connection.

[0003] In the related art, an electronic device includes a shell, a circuit board and a gasket, wherein both the shell and the circuit board are provided with fastening holes, and the gasket is located between the shell and the circuit board. Before the shell and the circuit board are connected, the shell and the circuit board are first pre-fixed relatively by a snap-fit ​​structure, and then fasteners such as rivets are used to penetrate the fastening holes of the circuit board, the gasket and the fastening holes of the shell in sequence, so that the shell and the circuit board are respectively in contact with the gasket, and the shell and the circuit board are electrically connected through the gasket.

[0004] However, since the housing and the circuit board are pre-fixed and electrically connected respectively through different structures, it is necessary to set a clamping structure for the housing and the circuit board to achieve pre-fixing, and to set a gasket to achieve electrical connection between the two, which makes the connection structure of the housing and the circuit board more complicated. Moreover, the housing and the circuit board are connected through the clamping structure, which is prone to problems such as insufficient clamping stability or difficulty in clamping. Utility Model Content

[0005] The purpose of the embodiments of the present application is to provide a grounding spring and an electronic device, which can solve the problem of complex connection structure between the housing and the circuit board of the electronic device in the related art.

[0006] In a first aspect, an embodiment of the present application provides a grounding spring for electrically connecting a housing and a circuit board of an electronic device, wherein the grounding spring comprises a connecting portion and a clamping portion connected to each other, wherein an edge of the connecting portion extends to form the clamping portion, and the connecting portion is used to connect the housing,

[0007] The clamping portion includes a connecting arm and at least one elastic arm, and the connecting arm and the elastic arm cooperate to form a slot, and the slot is used for engaging with the circuit board.

[0008] In a second aspect, an embodiment of the present application further provides an electronic device, comprising a housing, a circuit board, a fastener and the above-mentioned grounding spring sheet, wherein the connecting portion is connected to the housing via the fastener, and the clamping portion is engaged with the circuit board via the card slot.

[0009] In the embodiment of the present application, the shell is connected by the connecting part to realize the relative fixation of the grounding spring sheet and the shell, and the circuit board is clamped with the clamping slot of the clamping part to realize the relative fixation of the grounding spring sheet and the circuit board, so that the relative fixation of the shell and the circuit board can be realized, and the grounding spring sheet is in contact with the shell and the circuit board at the same time, so that the shell and the circuit board can be electrically connected. Therefore, the grounding spring sheet can not only pre-fix the circuit board, but also realize the electrical connection between the shell and the circuit board, without the need to set a complex clamping structure for the shell and the circuit board, which is conducive to simplifying the connection structure of the shell component and the circuit board.

[0010] In addition, since the grounding spring has elastic properties, the elastic arm of the clamping portion can produce elastic deformation during the process of clamping the circuit board in the slot, which is beneficial for the slot to clamp the circuit board, improve the clamping stability, and reduce the difficulty of clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic diagram of the structure of the grounding spring disclosed in the embodiment of the present application;

[0012] Figure 2 is a front view of the grounding spring disclosed in the embodiment of the present application;

[0013] Figure 3 is a top view of the grounding spring disclosed in the embodiment of the present application;

[0014] Figure 4 is a bottom view of the grounding spring disclosed in the embodiment of the present application;

[0015] Figure 5 It is a left view of the grounding spring disclosed in the embodiment of the present application;

[0016] Figure 6 It is a right side view of the grounding spring disclosed in the embodiment of the present application;

[0017] Figure 7 is an exploded diagram of an electronic device disclosed in an embodiment of the present application;

[0018] Figure 8 yes Figure 7 A partial schematic diagram of the

[0019] Fig. 9 is a top view of a circuit board disclosed in an embodiment of the present application;

[0020] Fig.10 is a bottom view of the circuit board disclosed in the embodiment of the present application;

[0021] Fig.11 It is a partial structural schematic diagram of an electronic device disclosed in an embodiment of the present application;

[0022] Fig.12 yes Fig.11 The enlarged view of point A in the middle;

[0023] Fig.13 is a partial cross-sectional view of the housing disclosed in the embodiment of the present application;

[0024] Fig.14 yes Fig.12 Sectional view at EE;

[0025] Fig.15 yes Fig.12 Cross-sectional view at FF;

[0026] Fig.16 yes Fig.12 Cross-sectional view at HH in the figure.

[0027] Description of reference numerals:

[0028] 10- grounding spring,

[0029] 100-connecting part, 110-limiting ring, 111-convex hull, 120-first limiting part, 121-limiting surface,

[0030] 200-clamping part, 200a-elastic arm, 210-first elastic arm, 211-straight arm part, 212-first bending part, 212a-straight section, 220-second elastic arm, 221-second bending part, 230-connecting arm,

[0031] C-card slot,

[0032] 20-shell, a-bottom wall, b-side wall, 21-protrusion, 22-fastening hole,

[0033] 30-circuit board, 31-exposed copper area,

[0034] 40-Fasteners. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0036] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0037] The grounding spring and the electronic device provided in the embodiments of the present application are described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0038] Please refer to Figure 1-Figure 16 The grounding spring 10 disclosed in the embodiment of the present application is used to electrically connect the housing 20 and the circuit board 30 of the electronic device to achieve grounding of the circuit board 30. Optionally, the housing 20 is provided with a receiving groove, the circuit board 30 is located in the receiving groove, and the grounding spring 10 is located between the circuit board 30 and the groove wall of the receiving groove.

[0039] The grounding spring 10 includes a connecting portion 100 and a clamping portion 200 connected to each other, wherein the connecting portion 100 is used to connect to the housing 20, and the clamping portion 200 is used to connect to the circuit board 30. Optionally, the connecting portion 100 and the clamping portion 200 may be an integrated structure, or of course, the two may also be separate structures.

[0040] Optionally, the connection part 100 can be connected to the housing 20 by a pressing member. Further optionally, the pressing member can be a fastener 40 such as a rivet or a screw. The housing 20 is provided with a fastening hole 22. When the fastener 40 extends into the fastening hole 22, the fastener 40 presses against the connection part 100 so that the connection part 100 presses against the housing 20. Alternatively, the pressing member can be a clamping fixture. When the connection part 100 contacts the housing 20, the clamping fixture directly acts on the connection part 100 so that the connection part 100 presses against the housing 20. In this way, the connection part 100 and the housing 20 are connected by the clamping force of the pressing member, without providing a complex clamping structure for the housing 20 and the circuit board 30. Of course, the connection part 100 can also be connected to the housing 20 in other ways.

[0041] The clamping part 200 includes a connecting arm 230 and at least one elastic arm 200a. The connecting arm 230 and the elastic arm 200a cooperate to form a card slot c, which is used to engage with the circuit board 30. The embodiment of the present application does not limit the specific structure of the connecting arm 230 and the elastic arm 200a. Optionally, when the circuit board 30 extends into the receiving slot of the housing 20, the card slot c directly engages with the edge of the circuit board 30, and the connecting arm 230 and the elastic arm 200a can produce elastic deformation and allow the circuit board 30 to extend into the card slot c, so that the clamping part 200 engages with the circuit board 30. Of course, the card slot c can also engage with other positions of the circuit board 30. The embodiment of the present application does not specifically limit the engaging position of the circuit board 30.

[0042] In the embodiment of the present application, the grounding spring 10 is connected to the housing 20 by the connecting portion 100, so that the grounding spring 10 is relatively fixed to the housing 20, and the grounding spring 10 is relatively fixed to the circuit board 30 by the clamping groove c of the clamping portion 200, so that the housing 20 and the circuit board 30 can be relatively fixed, and the grounding spring 10 is in contact with the housing 20 and the circuit board 30 at the same time, so that the housing 20 and the circuit board 30 can be electrically connected. Therefore, through the grounding spring 10, the circuit board 30 can be pre-fixed and the housing 20 and the circuit board 30 can be electrically connected, without the need to set a complex clamping structure for the housing 20 and the circuit board 30, which is conducive to simplifying the connection structure of the housing 20 and the circuit board 30.

[0043] In addition, since the grounding spring 10 has elastic properties, the elastic arm 200a of the clamping portion 200 can produce elastic deformation during the process of the slot c clamping the circuit board 30, which is beneficial for the slot c to clamp the circuit board 30, improve the clamping stability, and also help to reduce the difficulty of clamping.

[0044] In an optional embodiment, reference Figure 1 As shown, the connection part 100 includes a stop ring 110, and the stop ring 110 is used to connect the housing 20. Optionally, the stop ring 110 is used to be sleeved on the outside of the protrusion 21 provided on the bottom wall surface a of the housing 20, so that the stop ring 110 and the protrusion 21 are limitedly matched. The connection part 100 can be connected to the housing 20 by a fastener 40, and the fastener 40 can be a screw, a rivet or other components. When the fastener 40 extends into the fastening hole 22 of the protrusion 21, the fastener 40 presses the stop ring 110 to the housing 20. Specifically, the fastener 40 includes a screw and a nut. The screw is threadedly matched with the fastening hole 22, and the nut presses the stop ring 110 to the housing 20.

[0045] Optionally, the limiting ring 110 and the protrusion 21 may both be circular structures, square structures or structures of other shapes, and the embodiment of the present application does not impose any limitation on this, as long as the limiting ring 110 can be sleeved on the outside of the protrusion 21 .

[0046] By adopting this embodiment, the limiting ring 110 is sleeved on the outside of the protrusion 21, which is beneficial to increasing the contact area between the connecting part 100 and the fastener 40, and increasing the area of ​​the limiting cooperation between the connecting part 100 and the protrusion 21, thereby preventing the limiting ring 110 from detaching from the protrusion 21 along the radial direction of the protrusion 21, and is beneficial to improving the connection stability between the grounding spring piece 10 and the shell 20.

[0047] Moreover, the height position of the fastener 40 is no longer limited by the grounding spring 10. In the thickness direction of the shell 20, the positions of the fastener 40 and the protrusion 21 can be set lower. When the elastic snap-fit ​​structure 300 is snap-fitted with the circuit board 30, the position of the fastener 40 is lower than the lowest point of the circuit board 30. In this way, the circuit board 30 does not need to be provided with a gap to avoid the fastener 40, which is beneficial to improve the strength of the circuit board 30 and facilitates the arrangement of other electronic devices on the circuit board 30.

[0048] In another embodiment, reference Figure 5 and Figure 6 As shown, the connecting portion 100 further includes a first limiting portion 120, the first limiting portion 120 is connected to the outer edge of the limiting ring 110, the edge of the first limiting portion 120 extends to form a clamping portion 200, the surface of the first limiting portion 120 facing away from the limiting ring 110 is a limiting surface 121, the limiting surface 121 is used to limit the side wall surface b of the shell 20, and optionally, the limiting surface 121 is used to limit the contact with the side wall surface b of the shell 20. Among them, the first limiting portion 120 can be a limiting plate or other structures, and the embodiment of the present application does not limit the structure of the first limiting portion 120, and it can be limited to the side wall surface b of the shell 20.

[0049] According to the present embodiment, on the basis of the limit ring 110 being connected to the shell 20, the first limit portion 120 is utilized to continue to cooperate with the shell 20 to fix the position of the connecting portion 100 relative to the shell 20, thereby preventing the limit ring 110 from rotating relative to the protrusion 21 due to insufficient abutment force between the limit ring 110 and the shell 20.

[0050] In an optional embodiment, the plane where the first limiting portion 120 is located is perpendicular to the plane where the limiting ring 110 is located. Optionally, the side wall surface b of the housing 20 is a vertical surface, and the first limiting portion 120 is a limiting plate, and the plane where the limiting plate is located is parallel to the side wall surface b of the housing 20. When the limiting ring 110 is fixed, the first limiting portion 120 and the side wall surface b of the housing 20 are in close contact or have a small gap, and the first limiting portion 120 is pressed against the side wall surface b of the housing 20 by a clamping fixture, or the side wall surface b of the housing 20 and the limiting surface 121 of the limiting plate are connected by an adhesive to achieve relative fixation of the connecting portion 100 and the housing 20.

[0051] Of course, in other embodiments, the side wall surface b of the housing 20 is an inclined surface, and the angle between the plane where the first limiting portion 120 is located and the plane where the limiting ring 110 is located is an obtuse angle.

[0052] In an optional embodiment, the connection portion 100 includes a stop ring 110, the stop ring 110 is used to connect the housing 20, the stop ring 110 is provided with a convex 111, the convex 111 protrudes from the surface of the stop ring 110, and the stop ring 110 can be pressed against the housing 20 through the convex 111. In the case where the fastener 40 presses the stop ring 110 against the housing 20, the stop ring 110 directly presses against the housing 20 through the convex 111. Optionally, the convex 111 can be a circular convex ...

[0053] The convex hump 111 is provided to increase the contact area between the limiting ring 110 and the housing 20 , increase the abutting force between the limiting ring 110 and the housing 20 , and improve the connection stability between the grounding spring piece 10 and the housing 20 .

[0054] Of course, in other embodiments, the limiting ring 110 may not be provided with the convex bump 111 , and the surface of the limiting ring 110 is in direct contact with the housing 20 .

[0055] In an optional embodiment, the number of convex humps 111 may be one; or, the number of convex humps 111 may be multiple, and each convex humps 111 is arranged at intervals along the circumference of the limiting ring 110. With an increase in the number of convex humps 111, different positions of the limiting ring 110 contact different positions of the housing 20 through different convex humps 111, which is conducive to further increasing the contact area between the limiting ring 110 and the housing 20, and further increasing the abutting force between the limiting ring 110 and the housing 20, and further improving the connection stability of the grounding spring 10 and the housing 20.

[0056] In an alternative embodiment, reference Figure 1-Figure 2 as well as Figure 5-Figure 6 The elastic arm 200a includes a first elastic arm 210 and a second elastic arm 220 opposite to each other, wherein the first elastic arm 210 and the second elastic arm 220 both have elastic properties and can produce elastic deformation. The first elastic arm 210 and the second elastic arm 220 are respectively disposed at two ends of the connecting arm 230, and a slot c is formed between the first elastic arm 210 and the second elastic arm 220. The two ends of the connecting arm 230 refer to the two ends of the connecting arm 230 in the thickness direction of the housing 20.

[0057] When the circuit board 30 extends into the receiving groove of the housing 20, the edge of the circuit board 30 presses the first elastic arm 210, causing the first elastic arm 210 to produce elastic deformation to avoid the circuit board 30, so that the circuit board 30 can extend between the first elastic arm 210 and the second elastic arm 220. When the circuit board 30 is located between the first elastic arm 210 and the second elastic arm 220, the second elastic arm 220 will also produce elastic deformation, and the second elastic arm 220 will abut against the circuit board 30, thereby stably limiting the circuit board 30 between the first elastic arm 210 and the second elastic arm 220. Optionally, the first elastic arm 210 and the second elastic arm 220 can both be curved elastic arms, or elastic arms of other shapes.

[0058] With this embodiment, in the process of clamping the circuit board 30, both the first elastic arm 210 and the second elastic arm 220 can produce elastic deformation, and the two elastic arms together form a slot c for the edge of the circuit board 30 to extend into, and the matching area of ​​the slot c and the circuit board 30 is increased, which is conducive to further enhancing the elastic performance of the clamping part 200 and improving the connection stability between the grounding spring 10 and the circuit board 30. In addition, the circuit board 30 does not need to be provided with a slot, a jack or other structures that match the grounding spring 10, so the shape requirements of the circuit board 30 are relatively low, and the circuit board 30 has a wider range of applications.

[0059] Of course, in other embodiments, the elastic arm 200 a may only include the first elastic arm 210 , and the first elastic arm 210 and the connecting arm 230 together form a slot c.

[0060] In an optional embodiment, the first elastic arm 210 includes only a straight arm portion 211, a first end of the straight arm portion 211 is connected to the connecting arm 230, and an angle between a plane where the straight arm portion 211 is located and a plane where the connecting arm 230 is located is an acute angle. When the circuit board 30 is clamped in the clamping slot c, the straight arm portion 211 directly abuts against the edge of the circuit board 30.

[0061] In another embodiment, reference Fig.15 and Fig.16 As shown, the first elastic arm 210 further includes a first bending portion 212, which is disposed at the second end of the straight arm portion 211. When the circuit board 30 is clamped in the clamping slot c, the straight arm portion 211 abuts against the edge of the circuit board 30, and the first bending portion 212 is limitedly matched with the surface of the circuit board 30. Optionally, the first bending portion 212 is limitedly matched with the surface of the circuit board 30 in the thickness direction of the housing 20. When the circuit board 30 extends into the receiving slot of the housing 20, both the straight arm portion 211 and the first bending portion 212 are elastically deformed.

[0062] Providing the first bent portion 212 on the basis of the straight arm portion 211 is beneficial to enhancing the elastic performance of the first elastic arm 210 and ensuring that the first elastic arm 210 can produce a larger elastic deformation; moreover, when the circuit board 30 is connected to the slot c, not only the straight arm portion 211 abuts against the edge of the circuit board 30, but the first bent portion 212 is limitedly engaged with the surface of the circuit board 30, and the first bent portion 212 can prevent the circuit board 30 from disengaging in the reverse direction.

[0063] In an optional embodiment, if Fig.16 As shown, the first bending portion 212 includes a straight section 212a, which is a part of the bending structure of the first bending portion 212. The straight section 212a is connected to the straight arm portion 211, and the plane where the straight section 212a is located is parallel to the bottom surface of the connecting portion 100 used to connect with the housing 20. The bottom surface of the connecting portion 100 used to connect with the housing 20 is the bottom surface of the above-mentioned limiting ring 110, and the plane where the straight section 212a is located is parallel to the bottom surface of the limiting ring 110.

[0064] When the circuit board 30 is clamped between the first elastic arm 210 and the second elastic arm 220, the straight section 212a can directly cooperate with the surface of the circuit board 30. Since the plane where the straight section 212a is located is parallel to the bottom surface of the connecting portion 100 used to connect with the shell 20, the area of ​​the straight section 212a and the circuit board 30 is relatively large, which effectively prevents the circuit board 30 from escaping from the clamping slot c and ensures the stability of the circuit board 30 in the clamped state.

[0065] Of course, in other embodiments, the plane where the straight section 212 a is located intersects with the bottom surface of the connecting portion 100 used to connect with the housing 20 .

[0066] In an optional embodiment, if Figure 1 As shown, the second elastic arm 220 includes a second bent portion 221, and the bent portion of the second bent portion 221 can abut against the surface of the circuit board 30 to form an electrical connection. The embodiment of the present application does not limit the specific structure of the second bent portion 221. With this embodiment, when the circuit board 30 extends into the card slot c and the second elastic arm 220 generates elastic deformation, the bent portion of the second bent portion 221 directly abuts against the surface of the circuit board 30, ensuring that the circuit board 30 stably abuts against the second elastic arm 220, and at the same time, preventing the edge of the second elastic arm 220 from directly abutting against the surface of the circuit board 30 and damaging the circuit board 30.

[0067] Of course, in other embodiments, the second elastic arm 220 may be a straight elastic arm, that is, the second elastic arm 220 is not provided with a bending structure.

[0068] Optionally, refer to Fig. 9 and Fig.10 As shown, Fig. 9 and Fig.10 The schematic diagrams of the two opposite surfaces of the circuit board 30 are shown respectively, wherein the first elastic arm 210 contacts the front side of the circuit board 30, and the second elastic arm 220 contacts the back side of the circuit board 30. Moreover, the circuit board 30 has the exposed copper area 31 only on the back side. When the circuit board 30 is clamped in the clamping slot c, the second elastic arm 220 directly abuts against the exposed copper area 31 to realize the electrical connection between the grounding spring 10 and the circuit board 30. In this way, there is no need to open a socket on the circuit board 30 to set the spring, which is conducive to reducing the manufacturing cost of the circuit board 30. Only a relatively small area of ​​the exposed copper area 31 is required to realize the electrical connection. The exposed copper area 31 occupies a relatively small area, which is conducive to leaving space on the circuit board 30 for setting other electronic devices.

[0069] Based on the grounding spring 10 disclosed in the present application, an embodiment of the present application further provides an electronic device, the electronic device comprises a housing 20, a circuit board 30, a fastener 40 and the grounding spring 10 in the above embodiment, the connecting portion 100 is connected to the housing 20 through the fastener 40, and the clamping portion 200 is engaged with the circuit board 30 through the card slot c. Optionally, in the case where the connecting portion 100 comprises a limiting ring 110, the fastener 40 penetrates the limiting ring 110 and extends into the housing 20 to connect the grounding spring 10 with the housing 20, and further the clamping portion 200 can be engaged with the circuit board 30 through the card slot c to achieve relative pre-fixation of the housing 20 and the circuit board 30, and electrical connection between the two.

[0070] By adopting this embodiment, the grounding spring piece 10 of the electronic device can not only pre-fix the circuit board 30, but also realize the electrical connection between the shell 20 and the circuit board 30. There is no need to set a complex clamping structure for the shell 20 and the circuit board 30, which is conducive to simplifying the connection structure between the shell 20 and the circuit board 30, and further helps to simplify the structure of the electronic device.

[0071] In an optional embodiment, the number of the grounding spring 10 is one.

[0072] In another embodiment, reference Figure 7 As shown, there are at least two grounding springs 10 , each grounding spring 10 is arranged at intervals along the direction in which the edge of the circuit board 30 extends, and the slots c of the two grounding springs 10 are respectively engaged with the two opposite edges of the circuit board 30 .

[0073] By adopting this embodiment, the number of grounding springs 10 is increased, and different positions of the same circuit board 30 are electrically connected to the shell 20 through different grounding springs 10, and the circuit board 30 and the shell 20 are relatively fixed, which is beneficial to further improve the connection stability and grounding reliability.

[0074] In an optional embodiment, the connection portion 100 includes a stop ring 110, a protrusion 21 is provided on the bottom wall surface a of the housing 20, the stop ring 110 is sleeved on the outside of the protrusion 21, the stop ring 110 and the protrusion 21 are limitedly matched, and the fastener 40 passes through the stop ring 110 and the protrusion 21 to press the stop ring 110 against the housing 20. Specifically, the protrusion 21 is provided with a fastening hole 22, and the fastener 40 passes through the stop ring 110 and extends into the fastening hole 22 to press the stop ring 110 against the housing 20. The fastener 40 can be a threaded fastener such as a screw or a rivet, and the threaded fastener is threadedly matched with the fastening hole 22.

[0075] Before the fastener 40 connects the grounding spring piece 10 and the shell 20, the limiting ring 110 is sleeved on the outside of the protrusion 21 so that the limiting ring 110 and the protrusion 21 are limited and cooperated, which is beneficial to keep the grounding spring piece 10 and the shell 20 relatively pre-fixed, and is beneficial for the subsequent fastener 40 to accurately connect the grounding spring piece 10 and the shell 20. At the same time, it also prevents the limiting ring 110 from detaching from the protrusion 21.

[0076] Of course, in other embodiments, the protrusion 21 may not be provided on the bottom wall surface a of the shell 20 , and the fastener 40 directly penetrates the limiting ring 110 and extends into the bottom wall surface a of the shell 20 .

[0077] In an alternative embodiment, reference Fig.14 As shown, in the axial direction of the limit ring 110, the size of the limit ring 110 is larger than the size of the protrusion 21, that is, the thickness of the limit ring 110 is larger than the thickness of the protrusion 21. In this way, when the fastener 40 presses the limit ring 110, the pressing force of the fastener 40 basically only acts on the limit ring 110, which is beneficial for the limit ring 110 to fully contact with the protrusion 21, thereby improving the connection stability of the grounding spring 10.

[0078] Of course, in other embodiments, in the axial direction of the limiting ring 110 , the size of the limiting ring 110 may be equal to or smaller than the size of the protrusion 21 .

[0079] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A grounding spring for electrically connecting a housing (20) and a circuit board (30) of an electronic device, characterized in that: The grounding spring sheet (10) comprises a connecting portion (100) and a clamping portion (200) which are connected to each other, the edge of the connecting portion (100) extending to form the clamping portion (200), and the connecting portion (100) being used to connect to the housing (20); The clamping portion (200) comprises a connecting arm (230) and at least one elastic arm (200a), the connecting arm (230) and the elastic arm (200a) cooperate to form a card slot (c), and the card slot (c) is used to engage with the circuit board (30).

2. The grounding spring according to claim 1, characterized in that: The connecting portion (100) comprises a limiting ring (110) and a first limiting portion (120), wherein the limiting ring (110) is used to connect the shell (20), the first limiting portion (120) is connected to the outer edge of the limiting ring (110), and the edge of the first limiting portion (120) extends to form the clamping portion (200), and the surface of the first limiting portion (120) facing away from the limiting ring (110) is a limiting surface (121), and the limiting surface (121) is used to cooperate with the side wall surface (b) of the shell (20) in a limiting manner.

3. The grounding spring according to claim 1, characterized in that: The connecting portion (100) comprises a limiting ring (110), the limiting ring (110) being used to connect the shell (20), the limiting ring (110) being provided with a convex bump (111), the convex bump (111) protruding from the surface of the limiting ring (110), and the limiting ring (110) being able to abut against the shell (20) via the convex bump (111).

4. The grounding spring according to claim 3, characterized in that: There are a plurality of convex humps (111), and each convex hump (111) is arranged at intervals along the circumference of the limiting ring (110).

5. The grounding spring according to claim 1, characterized in that: The elastic arm (200a) comprises a first elastic arm (210) and a second elastic arm (220) which are opposite to each other. The first elastic arm (210) and the second elastic arm (220) are respectively arranged at two ends of the connecting arm (230), and the slot (c) is formed between the first elastic arm (210) and the second elastic arm (220).

6. The grounding spring according to claim 5, characterized in that: The first elastic arm (210) comprises a straight arm portion (211) and a first bent portion (212); the first end of the straight arm portion (211) is connected to the connecting arm (230); the first bent portion (212) is arranged at the second end of the straight arm portion (211); and the angle between the plane where the straight arm portion (211) is located and the plane where the connecting arm (230) is located is an acute angle. When the circuit board (30) is clamped in the clamping slot (c), the straight arm portion (211) abuts against the edge of the circuit board (30), and the first bent portion (212) is in position-limiting cooperation with the surface of the circuit board (30).

7. The grounding spring according to claim 6, characterized in that: The first bent portion (212) comprises a straight section (212a), the straight section (212a) is connected to the straight arm portion (211), and the plane where the straight section (212a) is located is parallel to the bottom surface of the connecting portion (100) for connecting to the shell (20).

8. The grounding spring according to claim 6, characterized in that: The second elastic arm (220) comprises a second bent portion (221), and the bent portion of the second bent portion (221) can abut against the surface of the circuit board (30) to form an electrical connection.

9. An electronic device, characterized in that: It comprises a shell (20), a circuit board (30), a fastener (40) and a grounding spring (10) as claimed in any one of claims 1 to 8, wherein the connecting portion (100) is connected to the shell (20) via the fastener (40), and the clamping portion (200) is engaged with the circuit board (30) via the card slot (c).

10. The electronic device according to claim 9, characterized in that: The connecting portion (100) includes a limiting ring (110), the bottom wall surface (a) of the shell (20) is provided with a protrusion (21), the limiting ring (110) is sleeved on the outside of the protrusion (21), the limiting ring (110) and the protrusion (21) are limitedly matched, and the fastener (40) passes through the limiting ring (110) and the protrusion (21) to press the limiting ring (110) against the shell (20).

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