Sinking plate elastic sheet and mobile terminal

Abstract

A sinking plate elastic sheet is attached to a printed circuit board provided with a via hole, and comprises a fixed plate body, a central hole formed by penetrating through the middle part of the fixed plate body, an elastic arm which is reversely bent from the outer edge of one end of the fixed plate body and extends to penetrate through the central hole, and a contact part formed by bending from the tail end of the elastic arm, the fixing plate body and one part of the elastic arm are located on the lower side of the printed circuit board, and one part of the elastic arm and the contact part penetrate through the center hole and penetrate through or are contained in the via hole. The utility model further comprises a mobile terminal, the overall height of parts outside the printed circuit board in the mobile terminal equipment can be effectively reduced, the through hole of the printed circuit board is utilized to guarantee the elastic force of the sinking plate elastic piece, the elastic force is guaranteed, and the overall height of the product is reduced.

Description

Technical Field

[0001] This application relates to the field of electrical connectors, and more particularly to a recessed spring and a mobile terminal. Background Technology

[0002] Electronic devices are becoming increasingly thinner and lighter, such as mobile phones and tablets. Terminal manufacturers are also demanding increasingly stringent requirements for the thinner and lighter design of components, striving to minimize their size. Spring connectors are widely used in electronic devices, typically mounted on printed circuit boards (PCBs) to connect antennas, motors, microphones, and other devices. To achieve thinness, the thickness and structure of the springs have been optimized based on existing materials. However, since conventional springs are mounted on one side of the PCB, a certain amount of deformation space is still needed on that side to maintain their elasticity and material strength.

[0003] Chinese Patent Application No. 201721781302.2 discloses a technical solution utilizing under-board space, comprising a transverse substrate and an elastic arm. The transverse substrate has through holes. The elastic arm has a concave arc segment, a first inclined segment, a convex arc segment, and a second inclined segment connected in sequence. The top of the convex arc segment protrudes upwards from the through hole above the transverse substrate. The lower end of the second inclined segment is connected to an anti-snagging protection part, which is confined beneath the transverse substrate. The transverse substrate is soldered to a PCB board, and the elastic arm is recessed into a countersunk hole in the PCB board. In this way, the through-hole thickness of the printed circuit board is used for the deformation space of the elastic arm, saving on-board space of the printed circuit board and reducing the height of components on one side of the printed circuit board.

[0004] However, the above solution only utilizes the space of the perforations in the circuit board, and further utilization of the perforation space is still needed to improve the size and elasticity of the spring. Utility Model Content

[0005] Therefore, it is necessary to provide a space-saving sink plate spring and a mobile terminal that ensure elasticity.

[0006] To solve the above-mentioned technical problems, this application provides a recessed spring sheet that is mounted on a printed circuit board with a through hole. It includes a fixed plate body, a central hole formed through the middle part of the fixed plate body, an elastic arm that extends through the central hole by bending backward from the outer edge of one end of the fixed plate body, and a contact portion formed by bending from the end of the elastic arm. The fixed plate body and a part of the elastic arm are located on the lower side of the printed circuit board. A part of the elastic arm and the contact portion pass through the central hole and pass through or are housed in the through hole.

[0007] Preferably, the central hole and the through hole are correspondingly provided, the size of the central hole is larger than the size of the through hole, the elastic arm includes a tensioning part formed by bending backward from the outer edge of the fixed plate and an extension part extending upward from the tensioning part into the through hole, and the contact part is formed by bending longitudinally from the top of the extension part.

[0008] Preferably, the tensioning part includes a first bending part that extends backward from the rear end of the fixed plate and then bends downward in an arc shape, a second bending part that connects to the first bending part and is formed on the bottom side of the tensioning part, and a third bending part that extends from the second bending part toward the central hole; the tensioning part has a U-shaped structure and is located below the fixed plate.

[0009] Preferably, the tensioning portion is divided into two parts from the middle and a cut-off portion is formed at the division. The cut-off portion divides the tensioning portion into two parts to give the tensioning portion better elasticity. The cut-off portion extends to the starting position of the extension portion.

[0010] Preferably, the contact portion is formed by bending the extension portion horizontally in the longitudinal direction and extending in the transverse direction to form a strip structure.

[0011] To address the aforementioned technical problems, this application also provides a mobile terminal, comprising a printed circuit board with a through-hole, a recessed spring attached to a first side of the printed circuit board, and an object electrically in contact with the recessed spring. The recessed spring includes a fixed plate attached to the first side of the printed circuit board, a central hole penetrating the fixed plate and corresponding to the through-hole, an elastic arm extending from the outer edge of one end of the fixed plate through the central hole and into the through-hole, and a contact portion formed by bending from the end of the elastic arm. A portion of the fixed plate and the elastic arm are located under the first side of the printed circuit board. A portion of the elastic arm and the contact portion pass through the central hole and are housed within the through-hole. The object is pressed into the through-hole and electrically contacts the contact portion.

[0012] Preferably, the size of the central hole is larger than the size of the through hole, the elastic arm includes a tensioning portion formed by bending backward from the outer edge of the fixed plate and an extension portion extending upward from the tensioning portion into the through hole, and the contact portion is formed by bending longitudinally from the top of the extension portion.

[0013] Preferably, the tensioning part includes a first bending part that extends backward from the rear end of the fixed plate and then bends downward in an arc shape, a second bending part that connects to the first bending part and is formed on the bottom side of the tensioning part, and a third bending part that extends from the second bending part toward the central hole; the tensioning part has a U-shaped structure and is located below the fixed plate.

[0014] Preferably, the tensioning portion is divided into two parts from the middle and a cut-off portion is formed at the division. The cut-off portion divides the tensioning portion into two parts to give the tensioning portion better elasticity. The cut-off portion extends to the starting position of the extension portion.

[0015] Preferably, the object is either an antenna or a contact terminal of an electronic component.

[0016] The recessed plate spring and mobile terminal of this application utilize the overall thickness of the printed circuit board as the deformation space of the recessed plate spring by setting through holes on the printed circuit board, and the recessed plate spring is formed by setting a center hole corresponding to the through hole on the fixed plate body, and then bending and extending from one end of the fixed plate body to form an elastic arm and contact part that enters the center hole. This fully utilizes the overall thickness of the printed circuit board as the deformation space of the recessed plate spring, and greatly reduces the height of the space on both sides of the printed circuit board. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0018] Figure 1 This is a perspective view of the sink plate spring in this application;

[0019] Figure 2 A perspective view of the recessed spring clip of this application mounted on a printed circuit board;

[0020] Figure 3 A perspective view of the recessed spring clip of this application mounted on a printed circuit board from another angle;

[0021] Figure 4 For along Figure 3 The cross-sectional view shown by the dashed line AA.

[0022] Explanation of reference numerals in the attached figures

[0023] Printed circuit board - 10; First side - 11; Second side - 12; Through hole - 13; Recessed plate spring - 20; Fixing plate - 21; Center hole - 22; Elastic arm - 23; Tensioning part - 231; First bending part - 2311; Second bending part - 2312; Third bending part - 2313; Extension part - 232; Cut-off part - 233; Contact part - 24. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them.

[0025] This application is based on Figure 3 The X direction is the vertical direction, the Y direction is the horizontal direction, and the Z direction is the vertical direction above.

[0026] Please see Figure 1 , Figure 4 As shown, the recessed plate spring 20 of this application includes a fixed plate 21, a central hole 22 formed in the middle of the fixed plate 21, an elastic arm 23 that is bent in the opposite direction from the outer edge of one side of the fixed plate 21 and extends through the central hole 22, and a contact portion 24 formed by horizontal bending from the top end of the elastic arm 23.

[0027] The fixing plate 21 has a planar structure, and the central hole 22 is opened in the middle of the fixing plate 21 and is surrounded by the fixing plate 21. The central hole 22 has a roughly square structure. The elastic arm 23 includes a tensioning part 231 formed by bending downward from the rear end of the fixing plate 21 and then bending towards the central hole 22, and an extension part 232 formed by continuing to extend upward from the tensioning part 231.

[0028] The tensioning portion 231 includes a first bent portion 2311 extending rearward from the rear end of the fixing plate 21 and then bending downward in an arc shape, a second bent portion 2312 connecting the first bent portion 2311 and formed on the bottom side of the tensioning portion 231, and a third bent portion 2313 extending from the second bent portion 2312 toward the central hole 22. The extension portion 232 extends vertically upward from the third bent portion 2313 and passes through the central hole 22. The tensioning portion 231 has a U-shaped structure and is mostly located below the fixing plate 21. The tensioning portion 231 is divided into two parts in the middle, and a cut-off portion 233 is formed at the division. The cut-off portion 233 divides the tensioning portion 231 into two parts, giving the tensioning portion 231 better elastic performance. The cut-off portion 233 extends to the starting position of the extension portion 232.

[0029] The tensioning part 231 is located on the lower side of the fixing plate 21, and the extension part 232 and the contact part 24 are located on the upper side of the fixing plate 21. The contact part 24 is a strip-shaped structure that extends laterally.

[0030] Please continue reading. Figures 2 to 4 As shown, the recessed spring 20 of this application is mounted on a printed circuit board 10, the printed circuit board 10 including a first side 11, a second side 12 opposite to the first side 11 and a through hole 13 formed in the vertical direction.

[0031] The fixing plate 21 of the recessed spring 20 is mounted and soldered to the second side surface 12 around the via 13 of the printed circuit board 10. The inner diameter of the central hole 22 is not less than the inner diameter of the via 13. The fixing plate 21 and the tensioning part 231 are both located on one side of the second side surface 12 of the printed circuit board 10. The extension part 232 and the contact part 24 are housed in the via 13, and the upper surface of the contact part 24 does not extend beyond the first side surface 11. The object to be connected by the recessed spring 20 in this application is a protruding structure. This object is pressed down onto the contact part 24 and extends downward into the via 13 to achieve an elastic electrical connection.

[0032] In one embodiment, the contact portion 24 may extend upward beyond the surface of the first side surface 11 to facilitate electrical contact with objects that are not protruding.

[0033] This application also includes a mobile terminal, which includes the printed circuit board 10, the recessed spring 20, and an object that is electrically in contact with the recessed spring 20. The object is one of an antenna or a connector for electronic components.

[0034] The recessed spring sheet and mobile terminal of this application provide a through hole 13 on the printed circuit board 10, and the recessed spring sheet 20 is provided with a center hole 22 corresponding to the through hole 13 on the fixed plate 21, and then the elastic arm 23 and contact part are formed by bending and extending from one end of the fixed plate 21 into the center hole 22. The overall thickness of the printed circuit board 10 is fully utilized as the deformation space of the recessed spring sheet 20, which greatly reduces the height of the space on both sides of the printed circuit board 10.

[0035] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0036] The above embodiments only illustrate preferred implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A sinker sheet, which is attached to a printed circuit board provided with a via hole, characterized in that, The circuit includes a fixed plate, a central hole formed through the middle part of the fixed plate, an elastic arm that extends through the central hole by bending backward from the outer edge of one end of the fixed plate, and a contact portion formed by bending from the end of the elastic arm. The fixed plate and a portion of the elastic arm are located on the lower side of the printed circuit board. A portion of the elastic arm and the contact portion pass through the central hole and pass through or are housed in the via.

2. The plate-sinking shell defined in claim 1, wherein The central hole is provided corresponding to the through hole, the size of the central hole is larger than the size of the through hole, the elastic arm includes a tensioning part formed by bending backward from the outer edge of the fixed plate body and an extension part extending upward from the tensioning part into the through hole, and the contact part is formed by bending longitudinally from the top of the extension part.

3. The plate-sinking shell defined in claim 2, wherein The tensioning part includes a first bending part that extends backward from the rear end of the fixed plate and then bends downward in an arc shape, a second bending part that connects to the first bending part and is formed on the bottom side of the tensioning part, and a third bending part that extends from the second bending part toward the central hole; the tensioning part has a U-shaped structure and is located below the fixed plate.

4. The plate-sinking shell defined in claim 3, wherein The tensioning portion is divided into two parts in the middle and a cut-off portion is formed at the division. The cut-off portion divides the tensioning portion into two parts to give the tensioning portion better elasticity. The cut-off portion extends to the starting position of the extension portion.

5. The plate-sinking shell defined in claim 3, wherein The contact portion is formed by bending the extension portion horizontally in the longitudinal direction and extending in the transverse direction to form a strip-shaped structure.

6. A mobile terminal, characterized by The device includes a printed circuit board with a through-hole, a recessed spring attached to a first side of the printed circuit board, and an object electrically in contact with the recessed spring. The recessed spring includes a fixed plate attached to the first side of the printed circuit board, a central hole penetrating the fixed plate and corresponding to the through-hole, an elastic arm extending from the outer edge of one end of the fixed plate through the central hole and into the through-hole, and a contact portion formed by bending from the end of the elastic arm. A portion of the fixed plate and the elastic arm are located under the first side of the printed circuit board. A portion of the elastic arm and the contact portion pass through the central hole and are housed in the through-hole. The object is pressed into the through-hole and makes electrical contact with the contact portion.

7. The mobile terminal of claim 6, wherein, The size of the central hole is larger than the size of the through hole. The elastic arm includes a tensioning portion formed by bending backward from the outer edge of the fixed plate and an extension portion extending upward from the tensioning portion into the through hole. The contact portion is formed by bending longitudinally from the top of the extension portion.

8. The mobile terminal of claim 7, wherein, The tensioning part includes a first bending part that extends backward from the rear end of the fixed plate and then bends downward in an arc shape, a second bending part that connects to the first bending part and is formed on the bottom side of the tensioning part, and a third bending part that extends from the second bending part toward the central hole; the tensioning part has a U-shaped structure and is located below the fixed plate.

9. The mobile terminal as described in claim 8, characterized in that, The tensioning portion is divided into two parts in the middle and a cut-off portion is formed at the division. The cut-off portion divides the tensioning portion into two parts to give the tensioning portion better elasticity. The cut-off portion extends to the starting position of the extension portion.

10. The mobile terminal of claim 6, wherein, The object is any one of an antenna, a contact terminal of an electronic component. The object is any one of an antenna, a contact terminal of an electronic component.

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