Sheet and electronic device using the same
By stamping a convex bulge and a contact arm design on the base surface of the spring, the stability and space occupation problems of the spring when in contact with the metal shell are solved, and a stable and reliable electrical connection is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JUST CONNECTOR KUSN
- Filing Date
- 2025-06-12
- Publication Date
- 2026-07-07
AI Technical Summary
Existing spring clips are prone to momentary poor contact due to shaking when the metal shell and metal nut come into contact, and the design occupies a large space, affecting the fit of other parts.
Design a spring with an upwardly protruding upper bulge formed by stamping the base surface, a first arm extending at a small angle and a second arm extending at a large angle downward and backward, and a welding foot set at the ear to ensure stable contact and save space.
It achieves stable and reliable contact between the metal shell and the base, taking into account both flexibility and space utilization efficiency, and avoiding contact problems caused by shaking.
Smart Images
Figure CN224472717U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electrical connectors, and more particularly to a spring and an electronic device using the spring. Background Technology
[0002] Chinese patent application ZL202020464738.4 discloses a spring contact and an electronic device using the spring contact. The spring contact includes a base, a through hole formed in the base, a contact arm formed by bending downwards from the base, and an ear formed by bending and extending from the edge of the base around the contact arm. The ear has solder feet. This spring contact product contacts a metal shell through the base and is then supported on a metal nut of the insulator by the contact arm at the bottom, achieving the function of grounding the metal shell and the metal nut through a circuit board. In the above technical solution, the metal shell contacts the top surface of the base, which can lead to momentary poor contact due to shaking. At the same time, the upward convex arc-shaped part formed by the contact part and the bend of the base to increase the force of the tensioning part occupies a certain amount of space and places higher space requirements on other parts that are expected to be mated. Utility Model Content
[0003] Therefore, it is necessary to provide a spring that has a stable connection and a small size, as well as an electronic device that uses the spring.
[0004] To solve the above-mentioned technical problems, this application provides a spring sheet, including a base, a through hole formed through the base, a tensioning portion formed by bending backward from the edge of the base, a contact arm formed by extending obliquely from the tensioning portion, and an ear portion formed by bending and extending from the edge of the base and located around the contact arm. The ear portion is provided with a welding foot. The surface of the base portion is stamped upward to form at least three upper protrusions located around the through hole, wherein the three upper protrusions form a triangular configuration.
[0005] Preferably, the contact arm includes a first arm portion extending rearward from the tensioning portion at a first tilt angle and a second arm portion extending rearward from the first arm portion at a second tilt angle, wherein the first tilt angle is smaller than the second tilt angle, a downwardly protruding second lower bulge is formed on the first arm portion, and a downwardly protruding first lower bulge is formed on the second arm portion.
[0006] Preferably, the first tilt angle is greater than or equal to 0 degrees and less than 5 degrees, and the second tilt angle is greater than or equal to 5 degrees and less than 30 degrees.
[0007] Preferably, the ear portion includes a lower fold portion formed by bending downward from the outside of the base portion, a platform portion formed by bending vertically from the top of the lower fold portion, and a welding foot formed by bending vertically downward from the outer end of the platform portion.
[0008] To address the aforementioned technical problems, this application also provides an electronic device, comprising an insulator with a nut, a printed circuit board positioned above the insulator, a spring positioned above the printed circuit board, a metal housing positioned above the spring, and a screw passing through the metal housing and screwed onto the nut. The spring includes a base contacting the lower part of the metal housing, a through hole in the base for the screw to pass through, a contact arm extending from the base in the opposite direction, and an ear extending downward from the edge of the base. The contact arm contacts the upper surface of the nut and provides elastic force. The ear has solder feet soldered to the printed circuit board. The metal housing is electrically connected to the spring and, through the spring, to the printed circuit board ground. The base surface of the spring is stamped upward to form at least three upper protrusions located around the through hole, wherein the three upper protrusions form a triangular configuration. The bottom surface of the metal housing is connected to the spring through the upper protrusions.
[0009] Preferably, the contact arm includes a first arm portion extending rearward from the tensioning portion at a first tilt angle and a second arm portion extending rearward from the first arm portion at a second tilt angle, the first tilt angle being smaller than the second tilt angle, a downwardly protruding second lower bulge being formed on the first arm portion, a downwardly protruding first lower bulge being formed on the second arm portion, and the upper surface of the nut forming an elastic electrical connection with at least the first lower bulge.
[0010] Preferably, the first tilt angle is greater than or equal to 0 degrees and less than 5 degrees, and the second tilt angle is greater than or equal to 5 degrees and less than 30 degrees.
[0011] Preferably, the ear portion includes a lower fold portion formed by bending downward from the outside of the base portion, a platform portion formed by bending vertically from the top of the lower fold portion, and a welding foot formed by bending vertically downward from the outer end of the platform portion.
[0012] Preferably, the printed circuit board has a first hole structure corresponding to the nut and a second hole structure for the solder feet of the spring to be inserted. The contact arm of the spring at least partially passes through the first hole structure and contacts the upper surface of the nut. The solder feet are inserted into the second hole structure, and the platform portion contacts the upper surface of the printed circuit board.
[0013] Preferably, the metal casing has a screw hole corresponding to the nut, and the bottom of the metal casing is also provided with a second contact portion that contacts the upper surface of the platform portion and a first contact portion that contacts the base portion. The plane where the first contact portion is located is higher than the plane where the second contact portion is located, and the base of the spring piece extends upward beyond the upper surface of the second contact portion and is located below the lower surface of the first contact portion.
[0014] The spring in this application and the electronic device using the spring achieve point contact between the metal shell and the base by stamping an upwardly protruding upper bulge on the base surface of the spring, making the contact more stable and reliable. At the same time, the contact arm includes a first arm extending at a small angle and a second arm extending obliquely downward and backward at a relatively large angle, which ensures the elasticity of the contact arm and takes into account the small space occupation. Attached Figure Description
[0015] The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of the present invention, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.
[0016] Figure 1 This is a perspective view of the spring clip of this application;
[0017] Figure 2 This is a perspective view of the spring clip from another angle.
[0018] Figure 3 For along Figure 1 The cross-sectional view shown by the dashed line AA;
[0019] Figure 4 For along Figure 2 The cross-sectional view shown by the dashed line BB;
[0020] Figure 5 This is a schematic diagram of the spring sheet of this application being used in an electronic device.
[0021] Explanation of reference numerals in the attached figures
[0022] Spring clip-10; Base-11; Through hole-110; Upper convex bulge-111; Contact arm-12; First arm-121; Second arm-122; Free end-123; First lower convex bulge-124; Second lower convex bulge-125; Tensioning part-13; Ear-14; Lower fold-down part-141; Platform part-142; Welding foot-143; Metal shell-20; Screw hole-21; Annular groove-22; First contact part-23; Second contact part-24; Printed circuit board-30; First hole structure-31; Second hole structure-32; Insulator-40; Nut-50; Internal thread-51; Screw-60. Detailed Implementation
[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings.
[0024] Please see Figures 1 to 4As shown, the spring clip 10 of this application includes a base 11, a through hole 110 penetrating the base 11, a tensioning portion 13 formed by bending backward from one end of the base 11, a contact arm 12 extending obliquely from the tensioning portion 13 below the base 11, and a plurality of ears 14 formed by bending downward from the edge of the base 11. The ears 14 include a lower folded portion 141 formed by bending downward from the edge of the base 11, a platform portion 142 formed by bending outward horizontally from the lower folded portion 141, and a welding leg 143 formed by bending downward from the platform portion 142.
[0025] The contact arm 12 includes a first arm 121 extending rearward from the tensioning portion 13 at a first angle, a second arm 122 extending rearward and downward from the first arm 121 at a second angle, and a second lower protrusion 125 and a second lower protrusion 124 respectively formed by downward punching from the first arm 121 and the second arm 122. The first angle at which the first arm 121 extends rearward from the tensioning portion 13 is smaller than the second angle at which the second arm 122 extends rearward from the first arm 122. Specifically, the first angle is between 0 and 5 degrees, and is the angle between the first arm 121 and the horizontal plane; the second angle is between 5 and 30 degrees, and is the angle between the second arm 122 and the horizontal plane. That is, the second arm 122 is formed by bending the first arm 121 downward and then extending rearward and downward. The contact arm 12 includes two contact arms located around the periphery of the through hole 110.
[0026] The base 11 has three upwardly protruding upper bumps 111 arranged around the periphery of the through hole 110, and the three upper bumps 111 are in a triangular configuration. The horizontal position of the first lower bump 124 is lower than the horizontal position of the second lower bump 125, but the second arm 122 will elastically deform upward when the spring piece 10 is in operation, so that both the first lower bump 124 and the second lower bump 125 make electrical contact with the object.
[0027] Please continue reading. Figure 5 As shown, the spring 10 is applied to an electronic device, which also includes a metal housing 20, a printed circuit board 30, an insulator 40, a nut 50 formed on the insulator 40, and a screw 60.
[0028] The insulator 50 is placed inside the electronic device, and the nut 50 is integrally formed inside the insulator 50. The nut 50 has an internal thread 51. The printed circuit board 30 is placed above the insulator 50, and the printed circuit board 30 has a first hole structure 31 corresponding to the nut 50 and a second hole structure 32 for the solder feet 143 of the spring contact 10 to be inserted. The spring contact 10 is placed above the printed circuit board 30, the contact arm 12 passes through the second hole structure 32 and contacts the upper surface of the nut 50 and provides elastic force (specifically, at least the first lower protrusion 124 on the second arm portion 122 is in electrical contact with the upper surface of the nut 50, and the second lower protrusion 125 on the first arm portion 121 can also be in electrical contact with the upper surface of the nut 50 when sufficiently compressed), the solder feet 143 are inserted into the second hole structure 32, and the platform portion 142 contacts the upper surface of the printed circuit board 30. The metal housing 20 is positioned above the spring piece 10. The metal housing 20 has a screw hole 21 corresponding to the nut 50. The upper outer periphery of the screw hole 21 is provided with an annular groove 22. The bottom of the metal housing 20 is also provided with a second contact part 24 that contacts the upper surface of the platform part 142 and a first contact part 23 that contacts the upper surface of the base part 11.
[0029] The first contact portion 23 is recessed upward from the second contact portion 24, and the horizontal plane of the first contact portion 23 is lower than the horizontal plane of the second contact portion 24. The first contact portion 23 elastically contacts three upper protrusions 111 formed on the surface of the base portion 11. When the base portion 11 contacts the first contact portion 23, the base portion 11 is subjected to a certain downward force and undergoes elastic deformation. At the same time, the contact arm 12 provides an upward elastic force to ensure that the upper protrusions 111 on the base portion 11 remain in contact with the metal housing 20 during shaking. The screw 60 passes through the screw hole 21 of the metal housing 20 and engages with the internal thread 51 of the nut 50, thereby clamping the spring piece 10 between the metal housing 20 and the printed circuit board 30.
[0030] The first contact portion 23 of the metal casing 20 contacts the upper protrusion 111 of the base 11 and causes the base 11 to undergo slight elastic deformation. At the same time, the elastic force of the elastic arm 12 enables the metal casing 20 to maintain stable electrical contact with the spring piece 10. The metal casing 20 and the nut 50 are connected to the printed circuit board 30 through the spring piece 10 to achieve stable grounding.
[0031] The spring sheet of this application and the electronic device using the spring sheet achieve point contact between the metal shell 20 and the base 11 by stamping an upwardly protruding upper bulge 111 on the surface of the base 11 of the spring sheet 10, making the contact more stable and reliable. At the same time, the contact arm 12 includes a first arm 121 extending at a small angle and a second arm 122 extending obliquely downward and backward at a relatively large angle, which ensures the elasticity of the contact arm 12 and also takes into account the small space occupation.
[0032] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.
Claims
1. A spring clip, comprising a base, a through hole formed through the base, a tensioning portion formed by bending backwards from the edge of the base, a contact arm extending obliquely from the tensioning portion, and an ear portion extending from the edge of the base and located around the contact arm, the ear portion having a welding foot, characterized in that, The base surface is punched upward to form at least three upper protrusions located around the through hole, wherein the three upper protrusions form a triangular configuration.
2. The spring clip as described in claim 1, characterized in that, The contact arm includes a first arm portion extending rearward from the tensioning portion at a first tilt angle and a second arm portion extending rearward from the first arm portion at a second tilt angle, wherein the first tilt angle is smaller than the second tilt angle, a downwardly protruding second lower bulge is formed on the first arm portion, and a downwardly protruding first lower bulge is formed on the second arm portion.
3. The spring clip as described in claim 2, characterized in that, The first tilt angle is greater than or equal to 0 degrees and less than 5 degrees, and the second tilt angle is greater than or equal to 5 degrees and less than 30 degrees.
4. The spring clip as described in claim 3, characterized in that, The ear portion includes a lower fold portion formed by bending downward from the outside of the base portion, a platform portion formed by bending vertically from the top of the lower fold portion, and a welding foot formed by bending vertically downward from the outer end of the platform portion.
5. An electronic device comprising an insulator with a nut formed thereon, a printed circuit board disposed above the insulator, a spring disposed above the printed circuit board, a metal housing disposed above the spring, and a screw passing through the metal housing and screwed onto the nut, wherein the spring includes a base contacting the lower part of the metal housing, a through hole formed in the base for the screw to pass through, a contact arm extending in the reverse direction from the base, and an ear extending downward from the edge of the base; the contact arm contacts the upper surface of the nut and provides elastic force; the ear has solder feet soldered to the printed circuit board; the metal housing is electrically conductive to the spring and connected to the printed circuit board ground through the spring, characterized in that... The base surface of the spring is punched upward to form at least three upper protrusions located around the through hole, wherein the three upper protrusions form a triangular configuration, and the bottom surface of the metal shell is connected to the spring through the upper protrusions.
6. The electronic device as claimed in claim 5, characterized in that, The contact arm includes a first arm portion extending rearward from the tensioning portion at a first tilt angle and a second arm portion extending rearward from the first arm portion at a second tilt angle, wherein the first tilt angle is smaller than the second tilt angle, a second downward protrusion is formed on the first arm portion, and a first downward protrusion is formed on the second arm portion, wherein the upper surface of the nut forms an elastic electrical connection with at least the first downward protrusion.
7. The electronic device as claimed in claim 6, characterized in that, The first tilt angle is greater than or equal to 0 degrees and less than 5 degrees, and the second tilt angle is greater than or equal to 5 degrees and less than 30 degrees.
8. The electronic device as claimed in claim 7, characterized in that, The ear portion includes a lower fold portion formed by bending downward from the outside of the base portion, a platform portion formed by bending vertically from the top of the lower fold portion, and a welding foot formed by bending vertically downward from the outer end of the platform portion.
9. The electronic device as claimed in claim 8, characterized in that, The printed circuit board has a first hole structure corresponding to the nut and a second hole structure for the solder feet of the spring to be inserted. The contact arm of the spring at least partially passes through the first hole structure and contacts the upper surface of the nut. The solder feet are inserted into the second hole structure. The platform portion contacts the upper surface of the printed circuit board.
10. The electronic device as claimed in claim 9, characterized in that, The metal casing has a screw hole corresponding to the nut. The bottom of the metal casing also has a second contact portion that contacts the upper surface of the platform portion and a first contact portion that contacts the base portion. The plane where the first contact portion is located is higher than the plane where the second contact portion is located. The base of the spring piece extends upward beyond the upper surface of the second contact portion and is located below the lower surface of the first contact portion.