Elastic sheet connector

Abstract

An elastic sheet connector comprises a substrate, a welding leg formed by continuously extending from the bottom of the substrate, a tensioning part formed by reversely bending from the top of the substrate, a contact elastic arm formed by obliquely extending from the tensioning part, and a protection wing formed by bending and extending from the transverse outer side of the substrate to the contact elastic arm, the base plate comprises a first base plate section and a second base plate section, and the protective wings are formed by bending the transverse outer side of the first base plate section. The contact elastic arm comprises a parallel extension part, a first inclined arm and an arc-shaped contact part, wherein the parallel extension part is formed by extending downwards from the tensioning part and extending in parallel with the second section of the substrate; the first inclined arm is formed by obliquely extending outwards and downwards from the parallel extension part; the arc-shaped contact part is formed by reversely bending from the tail end of the first inclined arm; and the parallel extension part and the second substrate section are used for limiting or fixing. The device can be adapted to a wireless earphone which is vertically inserted.

Description

Technical Field

[0001] This application relates to the field of electrical connectors, and particularly to a shrapnel connector. Background Art

[0002] Shrapnel connectors are widely used in electronic devices for contact connection of various electronic components or grounding, etc. However, for different application scenarios, the structure of the shrapnel connector needs to be changed to adapt to different usage scenarios. For example, in the fields of mobile phones, tablets, etc., the shrapnel is usually mounted on a printed circuit board, and then the connection object electrically contacts the elastic contact part of the shrapnel from directions such as the top surface or the side surface. In this application environment, the contact with the connection object is basically from the front. Charging cases are widely used in electronic devices such as TWS, etc., for charging small electronic devices and storing electronic devices, etc. The charging case needs to be provided with two accommodation cavities for TWS earphones, and the accommodation cavities need to be provided with electrical contact elements for the TWS earphones. Usually, elastic pins or shrapnel can be used to conduct the TWS earphones, but the cost of elastic pins is relatively high.

[0003] Chinese Patent Application No. 202322408947.3 discloses a shrapnel solution for a charging case, in which two shrapnels, a positive electrode and a negative electrode, are arranged in a TWS earphone jack to conduct the TWS earphone. And the shrapnel structure is thin and there is no protection design for the elastic arms, so it is easy to be damaged when foreign objects are inserted. Summary of the Utility Model

[0004] In view of this, it is necessary to provide a shrapnel connector that can conduct a connection object inserted vertically.

[0005] To solve the above technical problems, this application provides a shrapnel connector, including a substrate, solder feet continuously extending from the bottom of the substrate, a tensioning part formed by bending the substrate top in the reverse direction, a contact elastic arm obliquely extending from the tensioning part, and a protective wing formed by bending and extending from the lateral outside of the substrate towards the contact elastic arm. The substrate includes a first substrate section and a second substrate section. The protective wing is bent from the lateral outside of the first substrate section. The contact elastic arm includes a parallel extension part extending downward from the tensioning part and parallel to the second substrate section, a first inclined arm obliquely extending outward and downward from the parallel extension part, and an arc-shaped contact part formed by bending the end of the first inclined arm in the reverse direction. The parallel extension part and the second substrate section are used for limiting or fixing.

[0006] Preferably, the shrapnel connector is assembled in a charging case for conducting a wireless earphone inserted into the charging case. The charging case includes a housing, and several earphone jacks are provided in the housing. The shrapnel connector and the earphone jacks are both in a vertical state, and the arc-shaped contact part of the contact elastic arm extends into the earphone jack.

[0007] Preferably, the parallel extension part and the second section of the substrate are blocked inside the housing. When the wireless earphone is inserted into the earphone jack, the parallel extension part is blocked inside by the housing and not exposed inside the earphone jack.

[0008] Preferably, the solder feet are on the same plane as the substrate, and the solder feet are located obliquely below the contact spring arm. Solder holes are provided on the solder feet, and a welding area is formed by electroplating precious metals in the area near the solder holes.

[0009] Preferably, the contact spring arm further includes a second inclined arm extending from the arc-shaped contact part towards the substrate direction and a pre-pressed part formed by vertically bending downward at the end of the second inclined arm.

[0010] Preferably, the wing includes a first wing section whose outer edge has the same inclination angle as that of the first inclined arm, a second wing section connected to the first wing section and whose outer edge extends downward with a greater slope, a third wing section connecting the second wing section and whose outer edge extends vertically downward, and a fourth wing section located below the third wing section.

[0011] Preferably, the third wing section is at the widest position of the wing. The width of the fourth wing section is smaller than that of the third wing section. The slope of the outer edge of the second wing section makes there be a certain gap between the lower part of the first inclined arm, the arc-shaped contact part and the outer edge of the second wing section.

[0012] Preferably, the fourth wing section corresponds to the position of the pre-pressed part. The fourth wing section is bent inward to form a first pre-pressing piece for pressing the pre-pressed part, and the first pre-pressing piece does not exceed the outer edge of the third wing section.

[0013] Preferably, the two sides of the first wing section are bent inward to form second pre-pressing pieces for pressing the first inclined arm.

[0014] Preferably, the second pre-pressing piece presses the side of the first inclined arm close to the parallel extension part, and the second pre-pressing piece maintains the same inclination angle as the first inclined arm.

[0015] After the elastic sheet connector of the present application is installed in the charging box, the parallel extension part and the part of the first inclined arm located at the first wing section are both hidden and fixed inside the charging box, that is, the parallel extension part and the second section of the substrate can be used for fixing or limiting in the upper position to adapt to the wireless earphone inserted from the vertical direction and maintain the force required for the elastic sheet connector to be in a vertical state. Description of the Drawings

[0016] The accompanying drawings described herein are used to provide a further understanding of the present application and form 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 of the present application. In the drawings:

[0017] Figure 1 It is a diagram of the position of the elastic sheet terminals in the charging case of the present application;

[0018] Figure 2 It is a three-dimensional view of the first elastic sheet of the elastic sheet connector of the present application;

[0019] Figure 3 It is a front view of the negative electrode elastic sheet of the present application;

[0020] Figure 4 It is a three-dimensional view of the second elastic sheet of the elastic sheet connector of the present application;

[0021] Figure 5 It is a sectional view of the second elastic sheet of the present application.

[0022] Description of reference numerals

[0023] First elastic sheet connector - 10; main body part - 11; fixed wing - 111; limit convex part - 112; connecting part - 12; first elastic arm - 13; second elastic arm - 13'; vertical part - 131; extension arm - 132; arc contact part - 133; inner extension arm - 134; part to be held - 135; welding part - 14; welding hole - 141, 241; welding area - 142; second elastic sheet connector - 20; substrate - 21; first substrate section - 211; second substrate section - 212; tensioning part - 22; contact elastic arm - 23; parallel extension part - 231; first inclined arm - 232; arc contact part - 233; second inclined arm - 234; part to be pre-pressed - 235; smooth rib - 236, 136; welding leg - 24; protective wing - 25; first protective wing section - 251; second protective wing section - 252; third protective wing section - 253; fourth protective wing section - 254; first pre-pressing piece - 255; second pre-pressing piece - 256; earphone contact - 30; conducting part - 31; conducting surface - 32; conducting contact point - 30 docking first earphone jack - S1; second earphone jack - S2. Detailed implementation manners

[0024] To make the purpose, 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 accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments.

[0025] Please refer to Figure 1As shown, the charging case of the present application is mainly applied to the field of wireless earphones, serving as a charging station and a storage for charging the wireless earphones and storing the wireless earphones. The present application takes Figure 1 the Y direction shown as the vertical upward direction.

[0026] And the wireless earphones generally include a left earphone and a right earphone. Therefore, the charging case includes a first earphone jack S1 and a second earphone jack S2. As shown in the figure, it is a schematic diagram, and the positions of S1 and S2 roughly indicate the positions of the earphone jacks. The first earphone jack S1 and the second earphone jack S2 are connected to the battery in the charging case through elastic connectors 10 and 20, and the wireless earphones are in electrical contact with the elastic connectors 10 and 20 through earphone contacts 30. The earphone contact 30 includes a conducting portion 31 connected to the inside of the wireless earphone and a conducting surface 32 exposed outside the wireless earphone. The conducting surface 32 is in electrical contact with the elastic connectors 10 and 20, and each wireless earphone is provided with at least two earphone contacts 30.

[0027] The elastic connector includes a first elastic connector 10 and a pair of second elastic connectors 20. The first elastic connector 10 can be in electrical contact with the earphone contacts 30 of two wireless earphones at different positions, that is, the first elastic connector 10 is respectively exposed in the first earphone jack S1 and the second earphone jack S2. And each earphone jack further includes a second elastic connector 20 that cooperates with the first elastic connector 10. In this embodiment, the first elastic connector 10 serves as a negative connector, and the second elastic connector 20 serves as a positive connector. In other embodiments, the first elastic connector 10 can also be used as a positive connector, and the second elastic connector 20 can also be used as a negative connector.

[0028] Please refer to Figure 2 、 Figure 3 As shown, the first elastic connector 10 of the present application includes a main body portion 11 extending in the vertical direction, a welding portion 14 continuously extending from the lower end of the main body portion 11, a connecting portion 12 vertically bent from the top end of the main body portion 11, and a first elastic arm 13 and a second elastic arm 13' respectively extending downward from different positions on the outer edge of the connecting portion 12.

[0029] The main body portion 11 is used to be fixed inside the housing of the charging case. The main body portion 11 extends in the vertical direction. At both lateral sides of the middle of the main body portion 11 in the horizontal direction, fixing wings 111 are formed by bending towards the first elastic arm 13 and the second elastic arm 13'. At both lateral sides of the upper end of the main body portion 11 near the connection portion 12, after extending outwards and then bending backwards, limiting convex portions 112 are formed. The width of the main body portion 11 at the position of the fixing wings 111 is greater than the width of the rest of the main body portion 11. The limiting convex portions 112 are stacked with two layers of plates. The connection portion 12 is a horizontal plate-like structure. The first elastic arm 13 and the second elastic arm 13' extend by forking from the connection portion 12. Preferably, the included angle between the first elastic arm 13 and the second elastic arm 13' is 90 - 120 degrees, which can be determined according to the size and exposed position of the charging case, and may also be outside the range of this included angle.

[0030] Both the first elastic arm 13 and the second elastic arm 13' include a vertical portion 131 formed by bending downwards from the outer edge of the connection portion 12, an extension arm 132 extending obliquely outwards away from the main body portion 11 from the vertical portion 131, an arc-shaped contact portion 133 formed by continuing to extend from the extension arm 132 and then bending backwards, an inner extension arm 134 extending obliquely inwards and downwards from the end of the arc-shaped contact portion 133, and a held portion 135 formed by bending vertically downwards from the end of the inner extension arm 134.

[0031] On the surfaces of the arc-shaped contact portion 133 and the extension arm 132, smooth convex ribs 136 are formed by stamping outwards. The smooth convex ribs 136 slowly protrude outwards from the end of the extension arm 132 to avoid forming resistance. In the front view direction, as Figure 3 shown, the limiting convex portions 112 are located behind the vertical portion 131, and the lateral width of the limiting convex portions 112 extends outwards beyond the lateral outside of the vertical portion 131. The width between the arc-shaped contact portions 133 of the first elastic arm 13 and the second elastic arm 13' is the largest, and the fixing wings 111 are located behind the arc-shaped contact portions 133. The front view projection of the fixing wings 111 is located between a pair of the arc-shaped contact portions 133, and the held portion 135 is located below the fixing wings 111.

[0032] The welding part 14 extends downward from the main body part 11 and is located below the first elastic arm 13 and the second elastic arm 13'. The welding part 14 includes a welding hole 141 and a welding area 142, and the welding area 142 is electroplated with a precious metal such as gold. After the first elastic sheet connector 10 is installed in the charging case, the main body part 11 is fixed to the outer shell or other components of the charging case, and the limiting convex part 112, the fixing wing 111 and the welding part 13 can be fixed to the charging case. The arc-shaped contact parts 133 of the first elastic arm 13 and the second elastic arm 13' and part of the extension arms 132 extend into the first earphone jack S1 and the second earphone jack S2 of the charging case respectively to make electrical contact with a pair of wireless earphones respectively.

[0033] In the first elastic sheet connector 10 of the present application, by providing the main body part 11 and bending a connecting part 12 at the top of the main body part 11, the first elastic arm 13 and the second elastic arm 13' are respectively formed by extending from different positions on the outer edge of the connecting part 12. The first elastic arm 13 and the second elastic arm 13' respectively extend into the first earphone jack S1 and the second earphone jack S2 of the charging case, so that two wireless earphones can be simultaneously connected by one elastic sheet connector 10. In practical applications, the use of elastic sheet connectors can be effectively reduced, and the material and manufacturing costs can be reduced.

[0034] Please continue to refer to Figure 4 , Figure 5 As shown, the second elastic sheet connector 20 of the present application includes a vertically arranged substrate 21, a tensioning part 22 formed by bending the top of the substrate 21 in the reverse direction, a contact elastic arm 23 formed by bending and extending downward from the tensioning part 22, a welding leg 24 formed by extending downward from the bottom of the substrate 21, and wing guards 25 formed by bending outward from the two lateral sides of the substrate 21 to limit the spring height of the contact elastic arm 23.

[0035] The substrate 21 includes a first substrate section 211 and a second substrate section 212 extending upward from the first substrate section 211. The welding leg 24 extends downward from the first substrate section 211, and a welding hole 241 and a welding area (not labeled) electroplated with a precious metal are provided on the welding leg 24. The tensioning part 22 is formed by bending the top of the second substrate section 212 in the reverse direction.

[0036] The contact spring arm 23 includes a parallel extension part 231 formed by vertically extending downward from the tension part 22, a first inclined arm 232 formed by bending the lower end of the parallel extension part 231 away from the substrate 21 and extending obliquely downward, an arc-shaped contact part 233 formed by continuing to extend the first inclined arm 232 and then bending it in the reverse direction, a second inclined arm 234 formed by continuing to extend the arc-shaped contact part 233 toward the substrate 21, and a pre-pressed part 235 formed by vertically bending the end of the second inclined arm 234 downward. The parallel extension part 231 is parallel to the second section 212 of the substrate.

[0037] The wing 25 is formed by bending and extending from the lateral sides of the first section 211 of the substrate toward the contact spring arm 23. The second section 212 of the substrate and the parallel extension part 231 are located above the wing 25. The wing 25 includes a first wing section 251 whose outer edge is consistent with the first inclined arm 232, a second wing section 252 connected to the first wing section 251 and whose outer edge extends downward at a greater slope, a third wing section 253 connected to the second wing section 252 and whose outer edge extends vertically downward, and a fourth wing section 254 located below the third wing section 253. Second pre-pressing pieces 256 for pressing the first inclined arm 232 are formed by bending the two sides of the first wing section 251 inward. The wing width of the fourth wing section 254 is smaller than that of the third wing section 253. The fourth wing section 254 corresponds to the pre-pressed part 235 and a first pre-pressing piece 255 for pressing the pre-pressed part 235 is formed by bending the fourth wing section 254 inward.

[0038] The inclination slope of the first inclined arm 232 is substantially the same as the inclination slope of the outer edge of the first wing section 251, and the extension length of the first inclined arm 232 is greater than that of the first wing section 251, so that the arc-shaped contact part 233 is far away from the second wing section 252 and enough space is left between the two. The third wing section 253 corresponds to the second inclined arm 234 to prevent overpressure. The first pre-pressing piece 255 presses the free end of the contact spring arm 23, and the second pre-pressing piece 256 presses the upper end of the contact spring arm 23 so that all positions of the contact spring arm 23 are within a predetermined space. Both the first inclined arm 232 and the second pre-pressing piece 256 are inclined to reserve space for pressing downward from above.

[0039] After the second elastic sheet connector 20 of the present application is inserted into the charging case, the portions of the parallel extension portion 231 and the first inclined arm 232 located at the first wing section 251 are both hidden and fixed inside the charging case, that is, the parallel extension portion 231 and the second section 212 of the substrate can be used for fixing or limiting in the upper position. The arc-shaped contact portion 233 and the lower half of the first inclined arm 232 extend into the first earphone jack S1 or the second earphone jack S2. A smooth rib 236 consistent with the first elastic sheet connector 10 is formed by stamping at the end of the first inclined arm 232 and the arc-shaped contact portion 233.

[0040] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, 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, it should be considered as the scope recorded in this specification.

[0041] The above embodiments only express the preferred embodiments of the present invention, and the description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. A shrapnel connector, comprising a substrate, solder feet continuously extending from the bottom of the substrate, a tensioning portion formed by bending the substrate top portion in the reverse direction, a contact elastic arm obliquely extending from the tensioning portion, and a protective wing formed by bending and extending from the lateral outside of the substrate towards the contact elastic arm, characterized in that, The base plate includes a first base plate section and a second base plate section, the guard wing is formed by bending laterally outward from the first base plate section, the contact elastic arm includes a parallel extension portion extending downward from the tensioning portion and parallel to the second base plate section, a first inclined arm extending obliquely outward and downward from the parallel extension portion, and an arc-shaped contact portion bent reversely from the end of the first inclined arm, the parallel extension portion and the second base plate section are used for limiting or fixing.

2. The shrapnel connector according to claim 1, characterized in that, The shrapnel connector is assembled in the charging box for connecting the wireless earphones loaded in the charging box. The charging box includes a shell, and a plurality of earphone jacks are provided in the shell. The shrapnel connector and the earphone jacks are both vertically arranged, and the arc-shaped contact portion of the contact spring arm extends into the earphone jack.

3. The spring connector according to claim 2, wherein: The parallel extension portion and the second section of the base plate are blocked in the housing. When a wireless earphone is inserted into the earphone jack, the parallel extension portion is blocked in the housing and is not exposed in the earphone jack.

4. The spring connector according to claim 1, wherein: The soldering foot and the substrate are on the same plane and are located obliquely below the contact spring arm. A soldering hole is provided on the soldering foot, and a soldering area is formed by electroplating precious metal in the vicinity of the soldering hole.

5. The shrapnel connector according to claim 1, wherein The contact spring arm further includes a second inclined arm extending from the arc-shaped contact portion toward the substrate and a pre-pressed portion formed by vertically bending downward from the end of the second inclined arm.

6. The shrapnel connector according to claim 5, characterized in that The protective wing includes a first protective wing segment whose outer edge is consistent with the inclination angle of the first inclined arm, a second protective wing segment connected to the first protective wing segment and whose outer edge extends downward at a larger inclination, a third protective wing segment connected to the second protective wing segment and whose outer edge extends vertically downward, and a fourth protective wing segment located below the third protective wing segment.

7. The shrapnel connector according to claim 6, characterized in that, The third wing section is the widest position of the wing, the width of the fourth wing section is smaller than that of the third wing section, and the outer edge slope of the second wing section ensures a certain gap between the lower part of the first inclined arm and the arc-shaped contact part and the outer edge of the second wing section.

8. The spring connector according to claim 7, wherein: The fourth wing section corresponds to the pre-pressed portion, and is bent inwardly to form a first pre-pressed sheet for pressing the pre-pressed portion. The first pre-pressed sheet does not exceed the outer edge of the third wing section.

9. The elastic sheet connector according to claim 8, wherein, Both sides of the first wing section are bent inward to form a second pre-pressing sheet for pressing the first inclined arm.

10. The shrapnel connector according to claim 9, characterized in that, The second pre-compression sheet presses the first inclined arm on one side close to the parallel extension portion, and the second pre-compression sheet maintains an inclined angle consistent with that of the first inclined arm.

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