Elastic sheet connector with small contact offset

Abstract

The utility model relates to an elastic sheet connector with small contact offset. Comprising a base plate, wing parts formed by bending and extending backwards from the two transverse sides of the base plate, welding parts formed at the rear ends of the wing parts, elastic components formed by bending and extending backwards from the bottom end of the base plate, and inclined arms formed by bending and extending forwards and upwards from the rear ends of the elastic components, the contact part is formed on the inclined arm, the tensioning part is formed at the bending position of the elastic component and the inclined arm, and the vertical distance between the projection of the contact part on the elastic component and the substrate is larger than half of the longitudinal length of the elastic component when being observed from the vertical direction. When the elastic sheet connector is in a working state, the contact offset is small.

Description

Technical Field

[0001] The present application relates to the field of electrical connectors, and in particular to a spring-type connector with small contact offset. Background Art

[0002] CN202221111264.0 discloses a spring-loaded connector, which includes a top plate, side plates formed by bending and extending from both sides of the top plate, welding feet formed at the free ends of the side plates, a rear protective wall formed by bending and extending downward from one end of the top plate, a first elastic arm formed by bending and extending inward from the free end of the rear protective wall, a U-shaped lever arm extended from the free end of the first elastic arm, an inclined lever arm extended outward and obliquely upward from one end of the U-shaped lever arm away from the first elastic arm, and a contact portion formed at one end of the inclined lever arm away from the U-shaped lever arm.

[0003] See the Appendix to the Specification of the above-mentioned reference document. Figure 4 ,by Figure 4 The orientation of the drawing shown is described, the contact portion at the top of the first elastic arm is located above the rear protective wall in the vertical direction, and when the contact portion is pressed downward by the connection object, the elastic force is mainly carried by the U-shaped force arm, and the initial deformation point is located at the junction of the first elastic arm and the second elastic arm. Continue to press down, and the junction of the third elastic arm and the fourth elastic arm of the U-shaped force arm generates an elastic support force, and the contact portion will move forward and downward, and the moving distance will move forward from the current position shown in the figure to a position close to the top plate, and the front-to-back longitudinal movement distance is large. This structure requires that the contact area of ​​the connection object has a certain distance in the longitudinal direction. However, in some application environments, the connection object may be limited by space, etc., and it may not be possible to set a sufficient contact area. It is necessary to improve the position change of the initial state and the working state of the contact portion in the comparative document, so that the displacement of the contact area on the plane in the two states is minimized. Utility Model Content

[0004] In view of this, it is necessary to provide a spring connector with small contact offset.

[0005] In order to solve the above technical problems, the present application provides a spring connector with small contact offset, including a substrate, a wing portion formed by bending and extending backward from the lateral sides of the substrate, a welding portion formed at the rear end of the wing portion, an elastic member formed by bending and extending backward from the bottom end of the substrate, an inclined arm formed by bending and extending obliquely forward and upward from the rear end of the elastic member, a contact portion formed on the inclined arm, and a tensioning portion formed at the bending position of the elastic member and the inclined arm. When viewed from the vertical direction, the vertical distance of the projection of the contact portion on the elastic member from the substrate is greater than half of the longitudinal length of the elastic member.

[0006] Preferably, the elastic component is an inclined structure extending obliquely upward and rearward from the bottom of the substrate.

[0007] Preferably, the elastic component includes a first elastic arm formed by bending and extending backward from the bottom of the substrate, a second elastic arm formed by bending and extending upward from the rear end of the first elastic arm, and a third elastic arm formed by bending and extending backward from the upper end of the second elastic arm. The inclined arm is formed by bending and extending obliquely forward and upward from the rear end of the third elastic arm, and the tensioning portion is formed at the bending point of the third elastic arm and the inclined arm.

[0008] Preferably, when viewed from a vertical direction, a vertical projection of the contact portion is located on the third elastic arm, and a longitudinal length of the first elastic arm is greater than a longitudinal length of the third elastic arm.

[0009] Preferably, a distance between a vertical projection of the contact portion on the third elastic arm and the second elastic arm is between one quarter and one half of the length of the third elastic arm.

[0010] Preferably, the first elastic arm is formed by extending obliquely upward and backward from the bottom of the base plate, and the third elastic arm is a horizontally extending structure.

[0011] Preferably, the first elastic arm is formed by horizontally extending backward from the bottom of the base plate, and the third elastic arm is a horizontally extending structure.

[0012] Preferably, the welding portion includes a stick welding portion formed by folding from the lower side of the rear end of the wing portion to the laterally outer side and a plug welding portion formed by bending and extending outward from the upper side of the rear end of the wing portion and then bending and extending backward, the first elastic arm and the second elastic arm are located inside the wing portion, and the third elastic arm extends backward beyond the wing portion.

[0013] Preferably, when the spring connector is in a working state, the first elastic arm is deformed downward to provide elastic force, and the tensioning portion is compressed to provide elastic force.

[0014] Preferably, the spring connector also includes a pre-stressing portion formed by bending inward from the top of the wing, the top of the inclined arm is bent obliquely forward and downward to form a pre-stressing arm, the lower end of the pre-stressing arm is folded backward to form a pre-stressing portion, and the pre-stressing portion extends laterally on both sides to form a pre-stressing end portion located below the pre-stressing portion.

[0015] The spring-type connector with small contact offset of the present application is achieved by arranging the position of the contact part at a side away from the substrate, and the elastic force is provided by the elastic member. When pressed down, the rear end of the elastic member deforms downward, driving the contact part to deflect backward, and the tensioning part is compressed, driving the contact part to deflect forward so that the two can offset each other, thereby achieving a very small offset of the contact part in the longitudinal direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a 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 an improper limitation on the present application. In the drawings:

[0017] Figure 1 A stereoscopic diagram of a spring-type connector with small contact offset in the present application from a first viewing angle;

[0018] Figure 2 A stereoscopic diagram of the spring connector with small contact offset in the present application from a second viewing angle;

[0019] Figure 3 For along Figure 1 A cross-sectional view taken along the dashed line AA shown;

[0020] Figure 4 This is a schematic diagram comparing the initial state and the working state of the spring connector with small contact offset in this application.

[0021] Description of Reference Numerals

[0022] Spring-clip connector-10; substrate-11; wing-12; elastic member-13; first elastic arm-131; second elastic arm-132; third elastic arm-133; tensioning portion-134; welding portion-14; pasting welding portion-141; plug welding portion-142; inclined arm-15; contact portion-16; pre-stressing arm-17; pre-stressing portion-18; pre-stressing end portion-181; pre-stressing sheet body-19. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of this application clearer, the technical solution of this application will be clearly and completely described below in combination with the specific embodiments of this application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of this application, not all of them.

[0024] This application is Figure 1 The X direction is shown as the right side in the horizontal direction, the Y direction is shown as the front side in the longitudinal direction, and the Z direction is shown as the top side in the vertical direction.

[0025] See also Figures 1 to 3As shown, the spring connector 10 with less contact offset of the present application comprises a substrate 11, a wing portion 12 formed by bending backward and extending from both sides of the substrate 11, an elastic member 13 formed by bending backward and extending from the bottom of the substrate 11, an inclined arm 15 formed by extending from the elastic member 13 along an oblique upward direction and toward the substrate 11, a contact portion 16 formed at the top of the inclined arm 15, a pre-compression arm 17 formed by bending forward and downward from the inclined arm, and a welding portion 14 formed at the rear side of the wing portion 12. A tensioning portion 134 is formed at the bend of the third elastic arm 133 and the inclined arm 15, and the third elastic arm 133, the tensioning portion 134 and the inclined arm 15 are generally in a V-shaped structure.

[0026] The elastic member 13 includes a first elastic arm 131 formed by horizontally bending and extending backward from the bottom of the base plate 11, a second elastic arm 132 formed by bending and extending upward from the rear end of the first elastic arm 131, and a third elastic arm 133 formed by bending and extending backward from the top end of the second elastic arm 132. The inclined arm 15 is formed by bending and extending obliquely forward and upward from the rear end of the third elastic arm 133. The backward extension length of the first elastic arm 131 is limited to not exceeding the wing portion 12, the second elastic arm 132 is formed by extending upward within the range of the wing portion 12, the third elastic arm 133 is extended backward beyond the rear of the wing portion 12, and the tensioning portion 134 is backward beyond the rear of the welding portion 14. The inclination of the inclined arm 15 is relatively large, and the upper side of the inclined arm 15 extends upward beyond the upper side of the wing portion 12. The contact portion 16 is formed at the upper end portion of the inclined arm 15, and the upper end portion of the inclined arm 15 is stamped upward to form a convex structure, and the convex structure serves as the contact portion 16 to contact and conduct with the connection object.

[0027] When viewed from the vertical direction, the projection of the contact portion 16 in the vertical direction is located on the third elastic arm 133. From the front to the rear, the projection of the contact portion 16 in the vertical direction is located at a position of one quarter to one half of the length of the third elastic arm 133, and a vertical line passing through the contact portion 16 and perpendicular to the horizontal plane is located behind the wing portion 12. Specifically, the projection of the contact portion 16 in the vertical direction is at least located on the rear half of the elastic member 13.

[0028] The welding portion 14 includes a welding portion 141 formed by bending from the lower side of the rear end of the wing portion 12 to the lateral outside and a plug welding portion 142 formed by bending from the upper end of the wing portion 12 to the lateral outside and then bending backward to extend. The welding portion 141 is welded on the printed circuit board by patch method, and the plug welding foot 142 is inserted into the preset welding hole of the printed circuit board and welded and fixed. A gap is provided between the plug welding portion 142 and the welding portion 141. When viewed from the lateral direction, the third elastic arm 133 is located in the gap between the welding portion 141 and the plug welding portion 142 and extends backward, and the length of the second elastic arm 132 is less than the length of the first elastic arm 131 and the third elastic arm 133. The longitudinal length of the first elastic arm 131 is greater than the longitudinal length of the third elastic arm 133.

[0029] The top of the wing 12 is bent inward and extended to form a pair of pre-pressed sheets, and the free end of the pre-pressed arm 17 is bent backward to form a pre-pressed portion 18. The pre-pressed portion 18 extends outward on both sides to form a pre-pressed end portion 181 placed under the pre-pressed sheet 19 to keep the contact portion 16 at an initial predetermined height.

[0030] Key References Figure 2 As shown, the first elastic arm 131 is bent backward and extends from the bottom end of the substrate 11, and the lateral width of the first elastic arm 131 gradually decreases along the extension direction to maintain a suitable elastic force. The lateral widths of the second elastic arm 132 and the third elastic arm 133 are not greater than the minimum width of the first elastic arm 131. The elastic force of this design structure is mainly provided by the first elastic arm 131.

[0031] Please refer to Figure 4As shown, it is a schematic diagram of the deformation of the spring connector 10 with small contact offset in the idle state and the working state of the present application. When the connecting object contacts and squeezes the contact portion 16 downward, the center of gravity of the squeezing force is located behind the elastic member 13 (that is, at the position of the third elastic arm 133 in the vertical direction), and the elastic force of the elastic member 13 is first provided by the downward deformation of the first elastic arm 131. The rear end of the first elastic arm 131 will extend downward beyond the lower surface of the wing portion 12. This deformation will cause the contact portion 16 to deviate backward. However, after continuing to press downward, the tensioning portion 134 between the inclined arm 15 and the third elastic arm 133 will produce a deformation with a smaller angle, which will cause the contact portion 16 to deviate forward, thereby offsetting the backward movement of the contact portion 16 caused by the downward deformation of the elastic member 13. From the test results, with L1 as the perpendicular line of the contact portion 16 in the initial state and L2 as the perpendicular line of the contact portion 16 in the working state, the offset h of the contact portion 16 can be reduced to 0.033 mm, while the contact portion in the comparative document will be offset forward by 0.35 mm. The offset of the present application is reduced by an order of magnitude.

[0032] In other designs, if the space below the wing is limited and the elastic component 13 is not allowed to deform too much downward, the following design scheme can be adopted: the horizontal extension structure of the first elastic part 131 is modified to extend obliquely upward and backward, and the inclination angle is roughly enough to offset the downward deformation.

[0033] The design of the first elastic arm 131, the second elastic arm 132 and the third elastic arm 133 can ensure that the tensioning portion 134 does not occupy too much space under the wing portion 12 when moving downward. The second elastic arm 132 is bent upward to raise the horizontal position of the third elastic arm 133 and the tensioning portion 134, and the bending design of the elastic member 13 can also effectively enhance the elastic force. In other embodiments, the elastic member 13 does not have to be designed as a three-section structure. The first elastic arm 131, the second elastic arm 132 and the third elastic arm 133 can also be directly designed as a one-section structure extending obliquely to the rear, which can basically achieve the function of the present application. That is, the elastic member 13 is extended obliquely to the rear and upward, so as to reduce the distance that the elastic member 13 moves downward and reduce space occupancy.

[0034] The spring connector 10 with small contact offset of the present application sets the position of the contact part 16 on the side away from the substrate 11, and the elastic force is provided by the elastic member 13. When pressed down, the rear end of the elastic member 13 deforms downward, driving the contact part 16 to deflect backward, and the tensioning part 134 is compressed, which drives the contact part 16 to deflect forward so that the two offset each other, thereby achieving a very small offset of the contact part 16 in the longitudinal direction. Compared with the prior art, the contact part is close to the substrate. When pressed down, the elastic member will deform upward, causing the contact part to deflect forward, and the deformation of the tensioning part will also cause the contact part to deflect forward, resulting in a large total offset of the contact part due to the superposition of the two offsets, requiring a larger contact area of ​​the connection object, which is not conducive to the design of the connection object.

[0035] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, 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 express the preferred implementation of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A spring connector with small contact offset, comprising a substrate, a wing portion formed by bending and extending backward from both sides of the substrate, a welding portion formed at the rear end of the wing portion, an elastic member formed by bending and extending backward from the bottom end of the substrate, an inclined arm formed by bending and extending obliquely forward and upward from the rear end of the elastic member, a contact portion formed on the inclined arm, and a tensioning portion formed at the bending position of the elastic member and the inclined arm, characterized in that: When viewed from a vertical direction, a vertical distance between a projection of the contact portion on the elastic member and the substrate is greater than a half of a longitudinal length of the elastic member.

2. The spring connector with small contact offset as claimed in claim 1, characterized in that: The elastic component is an inclined structure extending obliquely upward and backward from the bottom of the base plate.

3. The spring connector with small contact offset as claimed in claim 1, characterized in that: The elastic component includes a first elastic arm formed by bending and extending backward from the bottom of the substrate, a second elastic arm formed by bending and extending upward from the rear end of the first elastic arm, and a third elastic arm formed by bending and extending backward from the upper end of the second elastic arm. The inclined arm is formed by bending and extending obliquely forward and upward from the rear end of the third elastic arm, and the tensioning portion is formed at the bending point of the third elastic arm and the inclined arm.

4. The spring connector with small contact offset as claimed in claim 3, characterized in that: When viewed from a vertical direction, a vertical projection of the contact portion is located on the third elastic arm, and a longitudinal length of the first elastic arm is greater than a longitudinal length of the third elastic arm.

5. The spring connector with small contact offset as claimed in claim 4, characterized in that: The distance between the vertical projection of the contact portion on the third elastic arm and the second elastic arm is between one quarter and one half of the length of the third elastic arm.

6. The spring connector with small contact offset as claimed in claim 4, characterized in that: The first elastic arm is formed by obliquely extending upward and backward from the bottom of the base plate, and the third elastic arm is a horizontally extending structure.

7. The spring connector with small contact offset as claimed in claim 4, characterized in that: The first elastic arm is formed by horizontally extending backward from the bottom of the base plate, and the third elastic arm is a horizontally extending structure.

8. The spring connector with small contact offset as claimed in claim 6 or 7, characterized in that: The welding portion includes a pasting welding portion formed by folding from the lower side of the rear end of the wing portion to the laterally outer side and a plug welding portion formed by bending and extending outward from the upper side of the rear end of the wing portion and then bending and extending backward. The first elastic arm and the second elastic arm are located inside the wing portion, and the third elastic arm extends backward beyond the wing portion.

9. The spring connector with small contact offset according to any one of claims 3 to 7, characterized in that: When the spring connector is in a working state, the first elastic arm is deformed downward to provide elastic force, and the tensioning portion is compressed to provide elastic force.

10. The spring connector with small contact offset according to any one of claims 1 to 7, characterized in that: The spring connector also includes a pre-stressing portion formed by bending inward from the top of the wing portion, the top of the inclined arm is bent obliquely forward and downward to form a pre-stressing arm, the lower end of the pre-stressing arm is folded backward to form a pre-stressing portion, and the pre-stressing portion extends laterally on both sides to form pre-stressing end portions located below the pre-stressing portion.

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