Multi-contact contact, clip spring, clip spring socket, crown spring and crown spring socket

Abstract

The present invention discloses a multi-contact contact, including a main body, the main body is provided with a concave surface, the concave surface is provided with a plurality of first slits and a plurality of second slits, the first slits and the second slits are parallel to each other and arranged in a staggered manner, a connecting strip is provided in the middle of the first slit, and both ends of the connecting strip are provided with warping springs bent toward the concave surface. The present invention shortens the effective conductive distance by the warping springs, and increases the effective conductive cross-sectional area, thereby reducing the contact resistance, so as to achieve low loss and high current carrying, low loss, and at the same time, the structure is relatively simple and convenient for production.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical connectors, and in particular to a multi-contact point contact piece, a clamp spring, a clamp spring socket, a crown spring and a crown spring socket. Background Art

[0002] Electrical connector contacts are conductive contact terminals used to connect to pins in electrical connectors and are widely used in electronic and electrical equipment. However, as the market's requirements for high current carrying and low loss of contacts continue to increase, there are currently few contacts on the market that meet both requirements.

[0003] Chinese patent CN201710845492.8 provides a high-current crown spring terminal, which is a cylindrical body formed by curling a rectangular sheet. The present invention uses a plurality of elastic cantilever beams and several elastic simply supported beams to be stamped out on the rectangular sheet, and a convex first contact is set on the first concave area of ​​each elastic cantilever beam on the rectangular sheet, a bent second contact is set on the free end of each elastic cantilever beam, a convex third contact is set on the fixed end, and convex fourth contacts are set at both ends of each elastic simply supported beam. The rectangular sheet is curled into a cylindrical crown spring terminal. Basically meet the requirements of high current carrying.

[0004] Combined with the contact resistance R (Ω) analysis. The main factors affecting the contact resistance R are: a. The effective conductive distance L (m) of the conductor, b. The resistivity ρ (Ω·mm 2 / m), c. Conductor effective conductive cross-sectional area A (mm 2 ).

[0005] The corresponding principle expression is:

[0006] Assuming that the same material is used as the contact material, that is, the resistivity ρ is the same; when the crown spring terminal contacts the pin, it is actually the top of the inner concave surface in the middle of the elastic cantilever beam that contacts, that is, point-to-point contact. This contact form is very common in conventional crown spring structures. In other words, its relative effective conductive cross-sectional area A remains unchanged. Its corresponding effective conductive distance L is actually 1 / 2 the length of the elastic cantilever beam. Therefore, when conducting a large current, the effective conductive distance L of the current is relatively long, and its contact resistance R will also increase accordingly. Ultimately, a large amount of electricity consumption will be generated.

[0007] At the same time, the manufacturing process in the above technical solution is relatively complicated, which greatly affects the production efficiency. Summary of the invention

[0008] The object of the present invention is to provide a multi-contact point contactor with high current carrying capacity and low loss and a relatively simple structure.

[0009] The technical solution adopted by the multi-contact contactor disclosed in the present invention is:

[0010] A multi-contact contact piece includes a main body, the main body is provided with a concave surface, the concave surface is provided with a plurality of first slits and a plurality of second slits, the first slits and the second slits are parallel to each other and arranged in a staggered manner, a connecting strip is provided in the middle of the first slit, and both ends of the connecting strip are respectively provided with a lifting spring sheet bent toward the concave surface.

[0011] As a preferred solution, the ends of the lifting spring sheets at both ends of the same connecting strip are respectively folded toward the two ends of the first slit.

[0012] As a preferred solution, the ends of the lifting spring sheets at both ends of the same connecting strip are respectively folded toward the middle of the first gap.

[0013] As a preferred solution, a bending portion is provided at the end of the lift-up spring piece, and the bending portion is bent toward the connecting strip.

[0014] As a preferred embodiment, an auxiliary spring sheet is provided at the end of the second slit, wherein the auxiliary spring sheet is in a "V" shape, the middle portion of the auxiliary spring sheet is folded toward a convex surface opposite to the concave surface, and the other end portion of the auxiliary spring sheet passes through the second slit to expose the concave surface.

[0015] The present technical solution also provides a clamp spring, comprising two multi-contact contact members and connecting pieces as described above, wherein the connecting pieces are respectively fixed to the main bodies of the two multi-contact contact members, the convex surfaces of the two multi-contact contact members are opposite, and the first gap is parallel to the connecting piece, and the concave edge of the main body is provided with a raised limiting strip, and the limiting strip is perpendicular to the first gap.

[0016] The technical solution also provides a clamping spring sleeve, including a first kit, which includes an annular fixing sleeve and a clamping spring as described above. The main body, the lifting spring sheet and the connecting sheet are attached to the inner wall of the fixing sleeve, and the limiting strip is clamped and fixed at the end of the fixing sleeve.

[0017] The technical solution also provides a crown spring, comprising the multi-contact point contact piece as described above, wherein the multi-contact point contact piece is curled into a crown spring body with an annular structure, and the concave surface is the outer wall of the crown spring body.

[0018] As a preferred solution, one end of the crown spring body is provided with a serration pattern.

[0019] The present technical solution also provides a crown spring sleeve, including a second set, a circular groove is opened at one end of the second set, and an annular groove is opened on the side wall of the circular groove, and also includes a crown spring as mentioned above, the crown spring is placed in the groove, the ends of the crown spring are respectively in contact with the side walls of the groove, and the main body and the lifting spring are in contact with the bottom of the groove.

[0020] The beneficial effects of the multi-contact contact disclosed in the present invention are: the main body is provided with a concave surface, and the concave surface is provided with a plurality of first slits and a plurality of second slits, the first slits and the second slits are parallel to each other and arranged in an interlaced manner, a connecting strip is provided in the middle of the first slit, and both ends of the connecting strip are provided with lifting springs bent toward the concave surface. The contact is placed in a matching kit, and when an external plug-in is inserted, the plug-in touches the convex surface of the main body opposite to the concave surface, thereby contacting the connecting strip provided in the middle of the first slit, and the current is conducted through the multiple lifting springs touching the inner wall of the kit, at this time, the multiple lifting springs increase the effective conductive cross-sectional area A in the form of multiple contacts; at the same time, the effective conductive distance L is actually the length of the short lifting spring, that is, the effective conductive distance L becomes smaller; when the same material is used as the contact material, that is, the resistivity ρ is the same. Its contact resistance R will also decrease accordingly, and ultimately reduce electrical loss. At the same time, the contact structure in the present technical solution is simple, which greatly improves the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of a multi-contact contact piece according to an embodiment of the present invention.

[0022] Figure 2 1 is a top view of a multi-contact contact member according to an embodiment of the present invention.

[0023] Figure 3 It is an enlarged view of region A of a multi-contact contact member according to a first embodiment of the present invention.

[0024] Figure 4 It is a schematic structural diagram of a multi-contact contact piece according to a second embodiment of the present invention.

[0025] Figure 5 1 is a top view of a multi-contact contact member according to a second embodiment of the present invention.

[0026] Figure 6 It is an enlarged view of region B of the multi-contact contact element of the second embodiment of the present invention.

[0027] Figure 7 It is a schematic diagram of the structure of the clamp spring according to the third embodiment of the present invention.

[0028] Figure 8 It is a side view of the clamp spring of embodiment 3 of the present invention.

[0029] Fig. 9 It is a schematic diagram of the structure of the clamp spring according to the fourth embodiment of the present invention.

[0030] Fig.10 It is a side view of the clamp spring of embodiment 4 of the present invention.

[0031] Fig.11 It is a schematic diagram of the structure of the clamp spring sleeve according to the fifth embodiment of the present invention.

[0032] Fig.12 It is an exploded view of the clamp spring sleeve according to the fifth embodiment of the present invention.

[0033] Fig.13 Schematic diagram of the structure of the crown spring according to the sixth embodiment of the present invention.

[0034] Fig.14 1 is a schematic structural diagram of a crown spring in an expanded state in Embodiment 7 of the present invention.

[0035] Fig.15 Schematic diagram of the structure of the crown spring according to the seventh embodiment of the present invention.

[0036] Fig.16 1 is an exploded view of the crown spring sleeve according to the eighth embodiment of the present invention.

[0037] Fig.17 4 is a cross-sectional view of a crown spring sleeve according to an eighth embodiment of the present invention. DETAILED DESCRIPTION

[0038] The present invention will be further described and illustrated below in conjunction with specific embodiments and accompanying drawings:

[0039] Embodiment 1:

[0040] Please refer to Figure 1-Figure 3 , a multi-contact contact includes a main body 110 .

[0041] The main body 110 is provided with a concave surface 111, and the concave surface 111 is provided with a plurality of first slits 1111 and a plurality of second slits 1112. The first slits 1111 and the second slits 1112 are parallel to each other and arranged alternately. A connecting strip 1113 is provided in the middle of the first slit 1111, and both ends of the connecting strip 1113 are respectively provided with lifting spring pieces 1114 bent toward the concave surface 111. The ends of the lifting spring pieces 1114 at both ends of the same connecting strip 1111 are folded toward the two ends of the first slit 1111 respectively.

[0042] The contact is placed in a matching kit. When the external plug-in is inserted, the plug-in contacts the convex surface of the main body 110 opposite to the concave surface 111, and thus contacts the connecting strip 1113 provided in the middle of the first gap 1111. The current is conducted through the multiple tilting springs 1114 contacting the inner wall of the kit. At this time, the multiple tilting springs 1113 increase the effective conductive cross-sectional area A in the form of multiple contact points; at the same time, the effective conductive distance L is actually the length of the short tilting spring 1114, that is, the effective conductive distance L becomes smaller; when the same material is used as the contact material, a large current is conducted, that is, the resistivity ρ is the same. Its contact resistance R will also decrease accordingly, and ultimately reduce electrical loss.

[0043] At the same time, the contact member in this embodiment has a simple structure. The main steps of its manufacturing process include: stamping, tearing and bending. The middle of the first slit 1111 is integrated with the connecting strip 1113, and the two ends of the connecting strip 1113 are stamped, and then the lifting spring piece 1114 of a specified size is torn out, and finally the lifting spring piece 1114 of a specified size is bent toward the end of the first slit 1111 to obtain the contact member in this embodiment. The process is simple and the production efficiency is greatly improved.

[0044] Embodiment 2:

[0045] Please refer to Figure 4 and Figure 5 , on the basis of the first embodiment, the tilting direction of the end of the tilting spring piece 2114 is changed, that is, the ends of the tilting spring pieces 2114 at both ends of the same connecting strip 2113 are folded toward the middle of the first slit 2111 respectively. The spatial position of the tilting spring piece 2114 in this embodiment is relatively centered, and the distance from the middle of the concave surface 211 to the inner wall of the sleeve is relatively large. Therefore, the deformation distance of the tilting spring piece 2114 in this embodiment is relatively long, that is, there is enough space for elastic deformation, so that its deformation and resilience are significantly improved. When the external plug-in is inserted, the plug-in squeezes the tilting spring piece 2114 to cause a large deformation, so that the plug-in can be inserted smoothly; in this embodiment, the deformation distance of the tilting spring piece 2114 is long, so that it has a strong resilience to squeeze the plug-in, so the plug-in, the tilting spring piece and the inner wall of the sleeve are tightly in contact. The stability of the overall contact relationship is well guaranteed. At the same time, combined with the strong resilience of the above-mentioned lifting spring piece 2114, the lifting spring piece 2114 can be restored to a natural state after the plug is pulled out, thereby extending the service life of the multi-contact contact piece.

[0046] Please refer to Figure 6 Preferably, a bending portion 21141 is provided at the end of the lifting spring piece 2114, and the bending portion 21141 is bent toward the connecting strip 2113. This prevents the end of the lifting spring piece 2114 from contacting and rubbing against the inner wall of the plug sleeve. When the plug is inserted, the bending portion 21141 of the lifting spring piece 2114 slides and rubs against the inner wall of the plug sleeve with its arc surface, making the insertion of the plug smoother.

[0047] Preferably, an auxiliary spring piece 2116 is provided at the end of the second slit 2112, and the auxiliary spring piece 2116 is in a "V" shape. The middle part of the auxiliary spring piece 2116 is folded toward the convex surface opposite to the concave surface 211 (not marked in the drawings), and the other end of the auxiliary spring piece 2116 passes through the second slit 2112 to expose the concave surface 211.

[0048] The external plug-in contacts the middle of the auxiliary spring piece 2116 , and the other end of the auxiliary spring piece 2116 contacts the inner wall of the assembly, thereby increasing the effective conductive cross-sectional area A and further helping to reduce the contact resistance R.

[0049] Embodiment three:

[0050] Please refer to Figure 7 and Figure 8 This embodiment also provides a clamp spring, including two multi-contact contact members and a connecting piece 320 as described above, the connecting piece 320 is respectively fixed to the main body 310 of the two multi-contact contact members, the convex surfaces of the two multi-contact contact members are opposite, and the first gap 3111 is parallel to the connecting piece 320, and the edge of the concave surface 311 of the main body 310 is provided with a raised limiting strip 3116, and the limiting strip 3116 is perpendicular to the first gap 3111.

[0051] The clamp spring structure in this embodiment is further optimized on the basis of the first embodiment to form a double-sided structure, and the contact plug is clamped by two multi-contact contact pieces to increase the effective conductive cross-sectional area A by doubling the contact area, thereby achieving the purpose of reducing the contact resistance R.

[0052] The clamp spring in this embodiment is adapted to the inserting element of the sheet structure.

[0053] Embodiment 4:

[0054] Please refer to Fig. 9 and Fig.10 This embodiment also provides a clamp spring, including two multi-contact contact members and a connecting piece 420 as described above, the connecting piece 420 is respectively fixed to the main body 410 of the two multi-contact contact members, the convex surfaces of the two multi-contact contact members are opposite, and the first gap 4111 is parallel to the connecting piece 420, and the edge of the concave surface 411 of the main body 410 is provided with a raised limiting strip 4116, and the limiting strip 4116 is perpendicular to the first gap 4111.

[0055] The clamp spring structure in this embodiment is further optimized on the basis of the second embodiment to form a double-sided structure, and the contact plug is clamped by two multi-contact contact pieces to increase the effective conductive cross-sectional area A by doubling the contact area, thereby achieving the purpose of reducing the contact resistance R.

[0056] The clamp spring in this embodiment is adapted to the inserting element of the sheet structure.

[0057] Embodiment five:

[0058] Please refer to Fig.11 and Fig.12 Based on the third and fourth embodiments, this embodiment also provides a clip spring sleeve structure as a further application.

[0059] The specific clamp spring insert includes a first set 530. The first set 530 includes an annular fixing sleeve 531, and also includes the clamp spring as described above, the main body 510, the lifting spring 5114 and the connecting piece 520 are attached to the inner wall of the fixing sleeve 531, and the limit strip 5116 is clamped and fixed at the end of the fixing sleeve 531.

[0060] The specific installation process is as follows:

[0061] First, squeeze the two ends of the clamp spring; then insert the clamp spring sideways into the fixing sleeve 531 until the limit strip 5116 is exposed from the fixing sleeve 531; release the force squeezing the two ends of the clamp spring, and the clamp spring will immediately return to its original state. At this time, the main body 510, the lifting spring piece 5114 and the connecting piece 520 are attached to the inner wall of the fixing sleeve 531, and the limit strip 5116 is clamped and fixed at the end of the fixing sleeve 531.

[0062] When the external plug-in is inserted, it first contacts the convex surface of the clamp spring. As the plug-in goes deeper, the convex surface of the clamp spring is pressed toward the concave surface. At this time, the two ends of the lifting spring 5114 respectively touch the inner wall of the fixing sleeve 531, and the lifting spring 5114 itself is compressed and elastically deformed. When the plug-in is fully inserted, the resilience of the lifting spring 5114 tightly touches the plug-in and the inner wall of the fixing sleeve 531 to achieve conduction.

[0063] Preferably, this embodiment adopts the clamp spring in the fourth embodiment as the contact piece, which can improve the contact effect of the clamp spring sleeve.

[0064] Embodiment six:

[0065] Please refer to Fig.13 Based on the first embodiment, this embodiment further provides a crown spring including the aforementioned multi-contact point contact member. The multi-contact point contact member in the first embodiment is rolled into a crown spring body 640 with an annular structure, and the concave surface 611 is the outer wall of the crown spring body 640.

[0066] Preferably, one end of the crown spring body 640 is provided with a sawtooth pattern 641 to solve the problem of poor contact caused by uneven contact end surface.

[0067] Embodiment seven:

[0068] Please refer to Fig.14 and 15 Based on the second embodiment, this embodiment further provides a crown spring including the aforementioned multi-contact point contact member. The multi-contact point contact member in the second embodiment is rolled into a crown spring body 740 with an annular structure, and the concave surface 711 is the outer wall of the crown spring body 740.

[0069] Preferably, one end of the crown spring body 740 is provided with a sawtooth pattern 741 to solve the problem of poor contact caused by uneven contact end surface.

[0070] Embodiment eight:

[0071] Please refer to Fig.16 and Fig.17 Based on the sixth and seventh embodiments, this embodiment also provides a crown spring sleeve structure as a further application.

[0072] The specific crown spring insert includes a second set 850. A circular groove 851 is opened at one end of the second set 850, and an annular groove 8511 is opened on the side wall of the circular groove 851, and also includes the crown spring as mentioned above, the crown spring is placed in the groove 8511, the ends of the crown spring are respectively in contact with the side walls of the groove 8511, and the main body 810 and the lifting spring 8114 are in contact with the bottom of the groove 8511.

[0073] The specific installation process is as follows:

[0074] First, the crown spring structure is curled into a ring structure with the ends touching each other; the crown spring in this state is inserted into the circular groove 851 ; the force pressing the crown spring is released, and the crown spring expands immediately, and the main body 810 and the lifting spring piece 8114 contact the bottom of the groove 8511 .

[0075] When the external plug-in is inserted, it first contacts the convex surface of the crown spring. As the plug-in goes deeper, the convex surface of the crown spring presses toward the concave surface. At this time, the two ends of the lifting spring piece 8114 respectively touch the bottom of the groove 8511, and the lifting spring piece 8114 itself is compressed and elastically deformed. When the plug-in is fully inserted, the resilience of the lifting spring piece 8114 tightly touches the plug-in and the bottom of the groove 8511 to achieve conduction.

[0076] Preferably, this embodiment uses the crown spring in the seventh embodiment as a contact element, which can improve the contact effect of the crown spring socket.

[0077] Preferably, the sawtooth pattern 841 of the crown spring body 840 is placed at one end away from the notch of the circular groove 851. The end of the sawtooth pattern 841 in this embodiment is a flat end surface, and multiple end surfaces touch the side wall of the groove 8511, which can increase the effective conductive cross-sectional area A, reduce the contact resistance R, and thus reduce the loss.

[0078] The present invention provides a multi-contact contact piece, wherein the main body is provided with a concave surface, and the concave surface is provided with a plurality of first slits and a plurality of second slits, the first slits and the second slits are parallel to each other and arranged in an interlaced manner, a connecting strip is provided in the middle of the first slit, and both ends of the connecting strip are provided with lifting springs bent toward the concave surface. The contact piece is placed in a matching kit, and when an external plug-in is inserted, the plug-in touches the convex surface of the main body opposite to the concave surface, thereby contacting the connecting strip provided in the middle of the first slit, and the current is conducted through the multiple lifting springs touching the inner wall of the kit, at which time the multiple lifting springs increase the effective conductive cross-sectional area A in the form of multiple contacts; at the same time, the effective conductive distance L is actually the length of the short lifting spring, that is, the effective conductive distance L becomes smaller; when the same material is used as the contact piece material, the resistivity ρ is the same. Its contact resistance R will also decrease accordingly, and ultimately reduce electrical loss. At the same time, the contact piece in the technical solution has a simple structure, which greatly improves production efficiency.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A multi-contact contact, characterized in that: The invention comprises a main body, wherein the main body is provided with a concave surface, and the concave surface is provided with a plurality of first slits and a plurality of second slits, wherein the first slits and the second slits are parallel to each other and arranged alternately, a connecting strip is provided in the middle of the first slit, and both ends of the connecting strip are respectively provided with warping spring pieces bent toward the concave surface, and an auxiliary spring piece is provided at the end of the second slit, and the auxiliary spring piece is in a "V" shape, and the middle part of the auxiliary spring piece is folded toward the convex surface opposite to the concave surface, and the other end of the auxiliary spring piece passes through the second slit to expose the concave surface.

2. The multi-contact contact according to claim 1, characterized in that: The ends of the lifting spring sheets at both ends of the same connecting strip are respectively folded toward the two ends of the first slit.

3. The multi-contact contact member according to claim 1, characterized in that: The ends of the tilting spring sheets at both ends of the same connecting strip are respectively folded toward the middle of the first slit.

4. The multi-contact contact member according to claim 1, characterized in that: A bending portion is provided at the end of the lifting spring piece, and the bending portion is bent toward the connecting strip.

5. A clip spring, characterized in that: It comprises two multi-contact type contact members and connecting pieces as described in any one of claims 1 to 4, wherein the connecting pieces are respectively fixed to the main bodies of the two multi-contact type contact members, the convex surfaces of the two multi-contact type contact members are opposite to each other, and the first gap is parallel to the connecting pieces, and the concave edge of the main body is provided with a raised limiting strip, and the limiting strip is perpendicular to the first gap.

6. A clip spring sleeve, comprising a first set, wherein the first set comprises an annular fixing sleeve, characterized in that: It also includes the clamp spring as described in claim 5, the main body, the lifting spring piece and the connecting piece are attached to the inner wall of the fixing sleeve, and the limiting strip is clamped and fixed at the end of the fixing sleeve.

7. A crown spring, characterized in that: It comprises the multi-contact point contact piece as claimed in any one of claims 1 to 4, wherein the multi-contact point contact piece is curled into a crown spring body with an annular structure, and the concave surface is the outer wall of the crown spring body.

8. The crown spring according to claim 7, characterized in that: One end of the crown spring body is provided with a sawtooth pattern.

9. A crown spring insert, comprising a second set, wherein one end of the second set is provided with a circular groove, and the side wall of the circular groove is provided with an annular groove, characterized in that: It also includes the crown spring as described in any one of claims 7 or 8, wherein the crown spring is placed in the groove, the ends of the crown spring are in contact with the side walls of the groove respectively, and the main body and the lifting spring are in contact with the bottom of the groove.

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