Shrapnel and electronic device using the same

Abstract

A spring piece includes a base, a through hole opened on the base, a contact arm formed by bending upward from the base and extending around the through hole, and an ear located at the periphery of the contact arm and extending upward from the edge of the base, wherein the ear is provided with a welding foot; the application also provides an electronic device.

Description

Technical Field

[0001] The present application relates to the field of electrical connectors, and in particular to a spring and an electronic device using the spring. Background Art

[0002] Shrapnel is widely used in electronic devices, such as mobile phones, laptops, etc. Shrapnel is generally welded on a printed circuit board, including a plate-shaped base and an elastic contact arm formed by bending and extending from the plate-shaped base in the opposite direction. Shrapnel is used to connect antenna signals, conduct switch signals, and some shrapnel is used for grounding. Conventional shrapnel is used in some special application fields, such as grounding with screws. Summary of the invention

[0003] In view of this, it is necessary to provide a spring piece that cooperates with a screw to lock and ground, and an electronic device using the spring piece.

[0004] In order to solve the above technical problems, the present application provides a spring piece, including a base, a through hole opened on the base, a contact arm formed by bending upward from the base and extending around the through hole, and an ear located on the periphery of the contact arm formed by bending upward from the edge of the base, and the ear is provided with a welding foot.

[0005] Preferably, the contact arm comprises two contact arms extending around the periphery of the through hole, and the top ends of the two contact arms are disconnected to form free ends.

[0006] Preferably, each contact arm comprises a plate portion which is reversely bent upward from the outer end of the base and is flush with the base, and an elastic arm which is formed by obliquely extending upward from the plate portion and along the periphery of the through hole.

[0007] Preferably, the plate portion of the contact arm and the free end of the elastic arm are respectively stamped to form convex bulges protruding upwards.

[0008] Preferably, the ear portion includes a vertical portion formed by bending upward from the outer side of the base portion, a platform portion formed by vertically bending from the top of the vertical portion, and a welding foot formed by vertically bending downward from the outer end of the platform portion.

[0009] In order to solve the above technical problems, the present application also provides an electronic device, including an insulator formed with a nut, a printed circuit board placed above the insulator, a spring plate placed above the printed circuit board, a metal shell placed above the spring plate, and a screw passing through the metal shell and screwed on the nut, the spring plate including a base in contact with the top of the nut, a through hole opened on the base for the screw to pass through, a contact arm formed by bending upward from the base and extending around the through hole, and an ear formed by bending upward from the edge of the base and extending and located at the periphery of the contact arm, the contact arm contacts the lower surface of the metal shell, the ear is provided with a solder foot welded to the printed circuit board, the metal shell is electrically conductive to the spring plate and is connected to the printed circuit board for grounding through the spring plate.

[0010] Preferably, the contact arm includes two contact arms extending around the periphery of the through hole, the top ends of the two contact arms are disconnected to form free ends, and each contact arm includes a plate portion that is reversely bent upward from the outer end of the base and is flush with the base, and an elastic arm formed from the plate portion obliquely upward and extending along the periphery of the through hole.

[0011] Preferably, the ear portion includes a vertical portion formed by bending upward from the outer side of the base portion, a platform portion formed by vertically bending from the top of the vertical portion, and a welding foot formed by vertically bending downward from the outer end of the platform portion.

[0012] Preferably, the printed circuit board is provided with a second hole structure corresponding to the nut and a first hole structure for inserting the solder foot of the spring sheet, the base of the spring sheet passes through the second hole structure and contacts the upper surface of the nut, the solder foot is inserted into the first hole structure, and the platform portion contacts the upper surface of the printed circuit board.

[0013] Preferably, a screw hole corresponding to the nut is formed on the metal shell, and a second contact portion contacting the upper surface of the platform portion and a first contact portion contacting the elastic arm are further formed on the bottom of the metal shell.

[0014] The present application clamps the spring sheet between the metal housing and the printed circuit board through the structural design of the spring sheet, and then fastens the spring sheet between the metal housing and the printed circuit board through screws, thereby achieving stable grounding performance of the metal housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0016] Figure 1 A three-dimensional diagram of the shrapnel of this application;

[0017] Figure 2 For this application Figure 1 The AA dashed line cross-sectional view shown;

[0018] Figure 3 This is a schematic diagram of the spring element of the present application being applied to an electronic device. DETAILED DESCRIPTION

[0019] In order to make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below in conjunction with the specific embodiments of the present application and the corresponding drawings.

[0020] See also Figure 1 , Figure 2 As shown, the spring piece 10 of the present application includes a base 11, a through hole 110 opened on the base 11, a contact arm 12 formed by bending upward from the base 11 and extending around the through hole 110, and an ear 14 located at the periphery of the contact arm 12 formed by bending upward from the edge of the base 11 and extending.

[0021] The contact arm 12 includes a plate portion 121 that is reversely bent upward from the outer end of the base portion 11 and is flat against the base portion 11, and an elastic arm 122 that extends obliquely upward from the plate portion 121 and along the periphery of the through hole 110. The contact arm 12 includes two contact arms that extend around the periphery of the through hole 110, and the top ends of the two contact arms 12 are disconnected to form free ends 123. The plate portion 121 of the contact arm 12 and the free end 123 of the elastic arm 122 are respectively stamped to form a convex bump 124 that protrudes upward.

[0022] The ear portion 14 includes a vertical portion 141 bent upward from the outer side of the base portion 11 , a platform portion 142 bent vertically from the top of the vertical portion 141 , and a welding foot 143 bent vertically downward from the outer end of the platform portion 142 .

[0023] Please continue reading Figure 3 As shown, the spring piece 10 is applied to an electronic device, and the electronic device further includes a metal housing 20 , a printed circuit board 30 , an insulator 40 , a nut 50 and a screw 60 formed on the insulator 40 .

[0024] The insulator 40 is placed inside the electronic device, the nut 50 is integrally formed in the insulator 40, and the nut 50 is provided with an internal thread 51. The printed circuit board 30 is placed above the insulator 40, and the printed circuit board 30 is provided with a second hole structure 32 corresponding to the nut 50 and a first hole structure 31 for inserting the solder leg 143 of the spring 10. The spring is placed above the printed circuit board 30, the base 11 passes through the second hole structure 32 and contacts the upper surface of the nut 50, the solder leg is inserted into the first hole structure 31, and the platform portion 142 contacts the upper surface of the printed circuit board 30. The metal shell 20 is placed above the spring 10, and the metal shell 20 is provided with a screw hole 21 corresponding to the nut 50, and an annular groove 22 is provided on the upper outer periphery of the screw hole 21. The bottom of the metal shell 20 is also provided with a second contact portion 24 contacting the upper surface of the platform portion 142 and a first contact portion 23 contacting the elastic arm 122. The screw 60 passes through the screw hole 21 of the metal housing 20 and is screwed onto the internal thread 51 of the nut 50 . The spring 10 is clamped between the metal housing 20 and the printed circuit board 30 by the screw 60 .

[0025] The first contact portion 23 of the metal shell 20 contacts the elastic arm 122 , and the metal shell 20 maintains stable electrical contact with the spring 10 by means of the elastic force of the elastic arm 122 . The metal shell 20 achieves stable grounding performance through the spring 10 .

[0026] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A shrapnel, characterized in that: It comprises a base, a through hole formed on the base, a contact arm formed by bending upward from the base and extending around the through hole, and an ear formed by bending upward from the edge of the base and extending and located at the periphery of the contact arm, wherein the ear is provided with a welding foot; Each contact arm includes a plate portion that is reversely bent upward from the outer end of the base and is flush with the base, and an elastic arm that extends obliquely upward from the plate portion and along the periphery of the through hole.

2. The shrapnel according to claim 1, characterized in that: The contact arm comprises two contact arms extending around the periphery of the through hole, and the top ends of the two contact arms are disconnected to form free ends.

3. The shrapnel according to claim 1, characterized in that: The plate portion of the contact arm and the free end of the elastic arm are respectively punched to form convex bulges protruding upwards.

4. The shrapnel according to claim 3, characterized in that: The ear portion includes a vertical portion formed by bending upward from the outer side of the base portion, a platform portion formed by vertically bending from the top of the vertical portion, and a welding foot formed by vertically bending downward from the outer end of the platform portion.

5. An electronic device, characterized in that: The invention comprises an insulator formed with a nut, a printed circuit board placed on the insulator, a spring sheet placed on the printed circuit board, a metal shell placed on the spring sheet, and a screw passing through the metal shell and screwed on the nut, wherein the spring sheet comprises a base contacting the top of the nut, a through hole provided on the base for the screw to pass through, a contact arm formed by bending upward from the base and extending around the through hole, and an ear formed by bending upward from the edge of the base and extending and located at the periphery of the contact arm, wherein the contact arm contacts the lower surface of the metal shell, the ear is provided with a solder foot welded on the printed circuit board, and the metal shell is electrically connected to the spring sheet and is connected to the printed circuit board through the spring sheet for grounding; Each contact arm includes a plate portion that is reversely bent upward from the outer end of the base and is flush with the base, and an elastic arm that extends obliquely upward from the plate portion and along the periphery of the through hole.

6. The electronic device according to claim 5, characterized in that: The contact arm comprises two contact arms extending around the periphery of the through hole, and the top ends of the two contact arms are disconnected to form free ends.

7. The electronic device according to claim 6, characterized in that: The ear portion includes a vertical portion formed by bending upward from the outer side of the base portion, a platform portion formed by vertically bending from the top of the vertical portion, and a welding foot formed by vertically bending downward from the outer end of the platform portion.

8. The electronic device according to claim 7, characterized in that: The printed circuit board is provided with a second hole structure corresponding to the nut and a first hole structure for inserting the solder foot of the spring sheet, the base of the spring sheet passes through the second hole structure and contacts the upper surface of the nut, the solder foot is inserted into the first hole structure, and the platform portion contacts the upper surface of the printed circuit board.

9. The electronic device according to claim 8, characterized in that: The metal shell is provided with a screw hole corresponding to the nut, and the bottom of the metal shell is also provided with a second contact portion contacting the upper surface of the platform portion and a first contact portion contacting the elastic arm.

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