CN113451817A - Cable connector of double-contact structure - Google Patents

Cable connector of double-contact structure Download PDF

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Publication number
CN113451817A
CN113451817A CN202010230266.0A CN202010230266A CN113451817A CN 113451817 A CN113451817 A CN 113451817A CN 202010230266 A CN202010230266 A CN 202010230266A CN 113451817 A CN113451817 A CN 113451817A
Authority
CN
China
Prior art keywords
opening
spring
torsion spring
cable connector
jack
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010230266.0A
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Chinese (zh)
Inventor
刘赞斌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Osenke Connection Technology Co ltd
Original Assignee
Shenzhen Osenke Connection Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Osenke Connection Technology Co ltd filed Critical Shenzhen Osenke Connection Technology Co ltd
Priority to CN202010230266.0A priority Critical patent/CN113451817A/en
Publication of CN113451817A publication Critical patent/CN113451817A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/04—Pins or blades for co-operation with sockets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/15—Pins, blades or sockets having separate spring member for producing or increasing contact pressure
    • H01R13/187—Pins, blades or sockets having separate spring member for producing or increasing contact pressure with spring member in the socket
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/40—Securing contact members in or to a base or case; Insulating of contact members
    • H01R13/42—Securing in a demountable manner
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/502—Bases; Cases composed of different pieces
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure

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  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Abstract

A cable connector with a double-contact structure comprises a first jack, a second jack, a spring ring, a first torsion spring and a second torsion spring; the first jack comprises an end part, a convex part and a connecting part for connecting the end part and the convex part, and the end part is provided with a first opening for accessing an external cable; the second jack is a hollow shell with openings at two ends, the opening at one end of the shell is a second opening, the opening at the other end of the shell is a third opening, the second opening is used for being inserted into the protruding part of the first jack, and the third opening is used for being inserted into an external cable; the spring ring, the first torsion spring and the second torsion spring are attached to the inner wall of the shell, the second torsion spring is located at the third opening, the spring ring is located at the second opening, and the first torsion spring is located between the spring ring and the second torsion spring; the spring ring, the first torsion spring and the second torsion spring form a parallel circuit to reduce the impedance, so that the aim of overloading larger rated current is fulfilled.

Description

Cable connector of double-contact structure
Technical Field
The invention relates to the field of cable connectors, in particular to a cable connector with a double-contact structure.
Background
In the assembly and connection of electronic products, the cable connector is widely applied, and is a key product for ensuring the correctness and reliability of electric signal transmission. With the development of industrial modernization, the industries of charging piles, electric vehicles, rail transit, high-speed rails, energy storage and the like widely need cable connectors suitable for large currents.
Patent publication No. CN106575829A discloses a cable connector comprising an electrically insulating connector housing 201202, a first cable comprising a first electrical conductor, and a second cable comprising a second electrical conductor. The cable connector may further include a first electrical terminal including a first terminal body mountable to the first electrical conductor, and a first at least one mounting portion including a plurality of mounting terminals extending from the first terminal body and out of the connector housing 201202 in a first direction. The first at least one mounting portion may be configured for mounting to a printed circuit board. The cable connector may further include a second electrical terminal including a second terminal body mountable to a second electrical conductor, and a second at least one mounting portion projecting from the second terminal body and projecting out of the connector housing 201202 in the first direction. The second at least one mounting portion may be configured for mounting to a printed circuit board.
The patent of publication number CN105470672A discloses a cable connector, which includes a plug connector, the plug connector includes a plug and a plug conductor, the plug is provided with a first cavity, a second cavity and a communicating portion, the first cavity, the second cavity and the communicating portion are all cylindrical, the first cavity is connected with the second cavity through the communicating portion, and the inner wall of the first cavity is provided with a thread; the plug electric conductor comprises a positioning sleeve, a conductive rod and an insulating part, wherein the conductive rod is of a cylindrical structure, one end of the conductive rod is provided with a buried hole along the axis of the conductive rod, the insulating part is provided with a cylinder matched with the conductive rod, the positioning sleeve is provided with a stepped hole, the small hole end of the stepped hole of the positioning sleeve is matched with the insulating part, and the large hole end of the stepped hole of the positioning sleeve is poured by epoxy resin; and the outer surface of one end of the positioning sleeve, which is close to the large hole end, is provided with a thread meshed with the thread of the first cavity.
The inventor thinks that the technical scheme is suitable for a printed circuit board or has an explosion-proof effect, is not suitable for a large-current cable, and any one of the parts is damaged, so that the whole cable connector needs to be replaced, and the use cost cannot be reduced.
Disclosure of Invention
The invention aims to provide a cable connector with a double-contact structure, which aims to solve the problem that the existing cable connector technology is not suitable for a large-current cable; on one hand, any one of the components is damaged, only the damaged component needs to be replaced, and the whole cable connector does not need to be replaced, so that the use cost is reduced.
The invention is realized in such a way that the technical scheme adopted by the cable connector with the double-contact structure is as follows: a cable connector with a double-contact structure is used for connecting a high-current cable and comprises a first jack, a second jack, a spring ring, a first torsion spring and a second torsion spring;
the first jack comprises an end part, a protruding part and a connecting part for connecting the end part and the protruding part, and the end part is provided with a first opening for accessing an external cable;
the second jack is a hollow shell with openings at two ends, the opening at one end of the shell is a second opening, the opening at the other end of the shell is a third opening, the second opening is used for being inserted into the protruding part of the first jack, and the third opening is used for being inserted with an external cable;
the spring ring, the first torsion spring and the second torsion spring are attached to the inner wall of the shell, the second torsion spring is located at the third opening, the spring ring is located at the second opening, and the first torsion spring is located between the spring ring and the second torsion spring;
the spring ring, the first torsion spring and the second torsion spring form a parallel circuit to reduce the impedance, so that the aim of overloading larger rated current is fulfilled.
Further, the cable connector further comprises a spacer located on a contact surface between the first torsion spring and the second torsion spring, and the spacer is used for increasing a contact area between the first torsion spring and the second torsion spring so as to further reduce the impedance.
Further, the cable connector further comprises a first fixing member, the first fixing member is located at the second opening, the first fixing member is a cavity with an annular opening, and the spring ring is placed on the inner wall of the first fixing member so that the position of the spring ring is fixed.
Further, the first torsion spring comprises a first end belt and a second end belt which are symmetrically arranged on the same axis, and the first end belt and the second end belt are fixedly connected through a first spring bar. The first spring strip is reversely twisted and is in a spiral shape, the first spring strips are uniformly arranged between the first end belt and the second end belt in an annular shape, and the first end belt, the second end belt and the first spring strips are integrally formed.
Furthermore, the second torsion spring comprises a third end belt and a fourth end belt which are symmetrically arranged on the same axis, and the third end belt and the fourth end belt are fixedly connected through a second spring strip. The second spring strip is reverse torsion and is the heliciform, and is a plurality of the second spring strip is annular align to grid be in the third end area with between the fourth end area, third end area, fourth end area and the second spring strip is integrated into one piece.
Further, the cable connector further comprises a second fixing piece, the second fixing piece is a cavity with an annular opening, the second fixing piece is located at the third opening, a groove is formed in the inner wall of the second fixing piece, and the groove is used for placing the fourth end belt to fix the position of the second torsion spring.
Furthermore, the inner wall of the shell is provided with spiral threads, and a certain interval is formed among the spiral threads and is distributed between the second opening and the third opening in a step shape.
Further, the shell is provided with a through hole, and the through hole is used for heat dissipation.
Further, the end portion is provided with a through hole for heat dissipation.
Further, a groove is formed in one side, close to the connecting portion, of the protruding portion, and the groove is used for fixing the second opening.
Compared with the prior art, the cable connector with the double-contact structure provided by the invention has the following advantages:
firstly, the spring ring, the first torsion spring and the second torsion spring form a parallel circuit to reduce the impedance, thereby achieving the purpose of overloading larger rated current;
and secondly, the first jack, the second jack, the spring ring, the first torsion spring, the second torsion spring, the first fixing piece, the second fixing piece and the isolating piece are parts with independent structures, any one part is damaged, only the corresponding part needs to be replaced, and the whole cable connector does not need to be replaced, so that the use cost is reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is an external schematic view of a cable connector with a dual-contact structure according to an embodiment of the present invention.
Fig. 2 is an external view of another direction of a cable connector with a dual-contact structure according to an embodiment of the present invention.
Fig. 3 is an exploded view of a cable connector with a dual-contact structure according to an embodiment of the present invention.
Fig. 4 is another exploded view of a cable connector with a dual-contact structure according to an embodiment of the present invention.
Fig. 5 is a schematic view of a first jack of a cable connector with a dual-contact structure according to an embodiment of the present invention.
Fig. 6 is a schematic view of another direction of the first jack of the cable connector with a dual contact structure according to the embodiment of the present invention.
Fig. 7 is a schematic view of another direction of the first jack of the cable connector with a dual contact structure according to the embodiment of the present invention.
Fig. 8 is a schematic view of a second jack of a cable connector with a dual-contact structure according to an embodiment of the present invention.
Fig. 9 is a schematic view of another direction of the second jack of the cable connector with a dual contact structure according to the embodiment of the present invention.
Fig. 10 is a schematic view of another direction of the second jack of the cable connector with a dual contact structure according to the embodiment of the present invention.
Fig. 11 is a schematic view of a cable connector with a dual contact structure according to an embodiment of the present invention after a second jack is mounted to a component.
Fig. 12 is a schematic view of another direction of the second jack mounting part of the cable connector with dual contact structure according to the embodiment of the present invention.
The first jack, labeled 1 in the above figures; 2. a second jack; 101. a first opening; 102. an end portion; 103. a connecting portion; 104. a projection; 105. a trench; 201. a housing; 203. a second opening; 204. a third opening; 3. a first fixing member; 4. a spring ring; 5. a first torsion spring; 6. a second torsion spring; 7. a spacer; 8. a second fixing member; 501. a first end band; 502. a second end band; 503. a first spring bar; 601. a third end band; 602. a fourth end band; 603. a second spring bar; 81. and (4) a groove.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present, it is to be understood that the terms "upper", "lower", "left", "right", and the like, if any, refer to an orientation or positional relationship based on that shown in the drawings, that is for convenience in describing and simplifying the description, and that no indication or suggestion that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, is therefore depicted in the drawings by the use of positional relationship descriptive terms only for purposes of illustration and not for purposes of limitation, the particular meaning of such terms being interpreted as broadly as will be understood by those skilled in the art based on the particular circumstances.
The technical solution of the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 to 12, a preferred embodiment of the present invention is shown.
A cable connector with a double-contact structure is used for connecting a large-current cable and comprises a first jack 1, a second jack 2, a spring ring 4, a first torsion spring 5 and a second torsion spring 6;
the first jack 1 comprises an end part 102, a convex part 104 and a connecting part 103 for connecting the end part 102 and the convex part 104, wherein the end part 102 is provided with a first opening 101 for accessing an external cable;
the second jack 2 is a hollow shell 201 with two open ends, the opening at one end of the shell 201 is a second opening 203, the opening at the other end of the shell 201 is a third opening 204, the second opening 203 is used for inserting the bulge 104 of the first jack 1, and the third opening 204 is used for inserting an external cable;
the spring ring 4, the first torsion spring 5 and the second torsion spring 6 are attached to the inner wall of the shell 201, the second torsion spring 6 is located at the third opening 204, the spring ring 4 is located at the second opening 203, and the first torsion spring 5 is located between the spring ring 4 and the second torsion spring 6;
the spring coil 4 forms a parallel circuit with the first torsion spring 5 and the second torsion spring 6 to reduce the resistance, thereby achieving the purpose of overloading a larger rated current.
Compared with the existing cable connector, the cable connector with the double-contact structure has the advantages that the spring ring 4, the first torsion spring 5 and the second torsion spring 6 form a parallel circuit to reduce impedance, so that the purpose of overloading with larger rated current is achieved, and the problem that the cable connector is not suitable for connecting a large-current cable is solved.
As an embodiment of the present invention, the cable connector further includes a spacer 7, the spacer 7 is located on a contact surface between the first torsion spring 5 and the second torsion spring 6, and the spacer 7 is used for the first torsion spring 5 and the second torsion spring 6 to increase a contact area so as to further reduce the impedance.
As an embodiment of the present invention, the cable connector further includes a first fixing member 3, the first fixing member 3 is a cavity with an annular opening, the first fixing member 3 is located at the second opening 203, and the spring ring 4 is placed on the inner wall of the first fixing member 3 to fix the position of the spring ring 4.
As an embodiment of the present invention, the first torsion spring 5 includes a first end band 501 and a second end band 502 symmetrically disposed on the same axis, and the first end band 501 and the second end band 502 are connected and fixed by a first spring strip 503. The first spring strips 503 are reversely twisted and spiral, the plurality of first spring strips 503 are uniformly arranged between the first end band 501 and the second end band 502 in a ring shape, and the first end band 501, the second end band 502 and the first spring strips 503 are integrally formed.
As an embodiment of the present invention, the second torsion spring 6 includes a third end strap 601 and a fourth end strap 602 symmetrically disposed on the same axis, and the third end strap 601 and the fourth end strap 602 are connected and fixed by a second spring strip 603. The second spring strips 603 are reversely twisted and spirally arranged, a plurality of second spring strips 603 are annularly and uniformly arranged between the third end band 601 and the fourth end band 602, and the third end band 601, the fourth end band 602 and the second spring strips 603 are integrally formed.
As an embodiment of the present invention, the cable connector further includes a second fixing member 8, the second fixing member 8 is a cavity with an annular opening, the second fixing member 8 is located at the third opening 204, the inner wall of the second fixing member 8 is provided with a groove 81, and the groove 81 is used for placing the fourth end strip 602 to fix the position of the second torsion spring 6.
As an embodiment of the present invention, the inner wall of the housing 201 is provided with a plurality of helical threads, and the helical threads are spaced at certain intervals and distributed in a step shape between the second opening 203 and the third opening 204, and the helical threads are used for inserting components of the second plug 2: the first fixing member 3, the first torsion spring 5, the spacer 7, the second torsion spring 6, and the second fixing member 8.
Specifically, the step of mounting the component to the second jack 2 is as follows: firstly, a spring ring 4 is arranged on the inner wall of a first fixing piece 3; secondly, the second fixing piece 8 is put in from the second opening 203, so that the second fixing piece 8 is arranged at the third opening 204, and the groove 81 of the second fixing piece 8 opens upwards; thirdly, the second torsion spring 6 is put into the second opening 203, so that the top end of the fourth end belt 602 of the second torsion spring 6 abuts against the inner wall of the groove 81 of the second fixing member 8, and the position of the second torsion spring 6 is fixed; fourthly, the isolation piece 7 is put in from the second opening 203, so that the lower surface of the isolation piece 7 is attached to the top of the third end band 601; fifthly, putting the second torsion spring 6 into the second opening 203, so that the top of the second end band 502 is attached to the upper surface of the isolation member 7; sixthly, the first fixing member 3 with the spring ring 4 placed therein is put in from the second opening 203, so that the bottom of the first fixing member 3 is attached to the top of the first end band 501. Thus, the first fixing member 3 and the coil spring 4, the first torsion spring 5, the spacer 7, the second torsion spring 6, the second fixing member 8 are sequentially fixed inside the second insertion hole 2.
When in use, the convex part 104 of the first jack 1 is inserted into the second opening 203 of the second jack 2, the second opening 203 is clamped at the groove 105 of the first jack 1, and two cables to be connected are respectively inserted into the first opening 101 of the first jack 1 and the third opening 204 of the second jack 2.
As an embodiment of the present invention, the case 201 is provided with a plurality of through holes for heat dissipation.
As an embodiment of the present invention, the end portion 102 is provided with a through hole for heat dissipation.
In one embodiment of the present invention, a groove 105 is disposed on a side of the protrusion 104 close to the connection portion 103, and the groove 105 is used for fixing the second opening 203.
Preferably, the first jack 1, the second jack 2, the spring ring 4, the first torsion spring 5, the second torsion spring 6, the first fixing member 3, the second fixing member 8 and the isolating member 7 are all parts of independent structures, any one of the parts is damaged, only the corresponding part needs to be replaced, and the whole cable connector does not need to be replaced, so that the use cost is reduced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. The cable connector with the double-contact structure is used for connecting a high-current cable and comprises a first jack, a second jack, a spring ring, a first torsion spring and a second torsion spring;
the first jack comprises an end part, a protruding part and a connecting part for connecting the end part and the protruding part, and the end part is provided with a first opening for accessing an external cable;
the second jack is a hollow shell with openings at two ends, the opening at one end of the shell is a second opening, the opening at the other end of the shell is a third opening, the second opening is used for being inserted into the protruding part of the first jack, and the third opening is used for being inserted with an external cable;
the spring ring, the first torsion spring and the second torsion spring are attached to the inner wall of the shell, the second torsion spring is located at the third opening, the spring ring is located at the second opening, and the first torsion spring is located between the spring ring and the second torsion spring;
the spring ring, the first torsion spring and the second torsion spring form a parallel circuit to reduce the impedance, so that the aim of overloading larger rated current is fulfilled.
2. The cable connector of claim 1, further comprising a spacer at a contact surface between the first torsion spring and the second torsion spring, wherein the spacer is used for increasing a contact area between the first torsion spring and the second torsion spring so as to further reduce the impedance.
3. The cable connector of claim 1 or 2, further comprising a first fixing member located at the second opening, wherein the first fixing member is a cavity with an annular opening, and the spring ring is disposed on an inner wall of the first fixing member to fix a position of the spring ring.
4. The cable connector of claim 1, wherein the first torsion spring includes a first end band and a second end band symmetrically disposed on the same axis, and the first end band and the second end band are connected and fixed by a first spring strip. The first spring strip is reversely twisted and is in a spiral shape, the first spring strips are uniformly arranged between the first end belt and the second end belt in an annular shape, and the first end belt, the second end belt and the first spring strips are integrally formed.
5. The cable connector of claim 1, wherein the second torsion spring includes a third end strip and a fourth end strip symmetrically disposed on the same axis, and the third end strip and the fourth end strip are connected and fixed by a second spring strip. The second spring strip is reverse torsion and is the heliciform, and is a plurality of the second spring strip is annular align to grid be in the third end area with between the fourth end area, third end area, fourth end area and the second spring strip is integrated into one piece.
6. The cable connector of claim 5, further comprising a second fixing member, wherein the second fixing member is a cavity with an annular opening, the second fixing member is located at the third opening, and a groove is formed in an inner wall of the second fixing member and used for placing the fourth end band to fix the position of the second torsion spring.
7. The cable connector of claim 1, wherein the inner wall of the housing has a spiral thread, and the spiral threads are spaced apart from each other and distributed in a step-like manner between the second opening and the third opening.
8. The cable connector of a dual contact structure according to claim 1 or 7, wherein the housing is provided with a through hole for dissipating heat.
9. The cable connector of claim 1, wherein the end portion is provided with a through hole for dissipating heat.
10. The cable connector of claim 1, wherein a side of the protrusion near the connecting portion is provided with a groove for fixing the second opening.
CN202010230266.0A 2020-03-27 2020-03-27 Cable connector of double-contact structure Pending CN113451817A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010230266.0A CN113451817A (en) 2020-03-27 2020-03-27 Cable connector of double-contact structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010230266.0A CN113451817A (en) 2020-03-27 2020-03-27 Cable connector of double-contact structure

Publications (1)

Publication Number Publication Date
CN113451817A true CN113451817A (en) 2021-09-28

Family

ID=77808054

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010230266.0A Pending CN113451817A (en) 2020-03-27 2020-03-27 Cable connector of double-contact structure

Country Status (1)

Country Link
CN (1) CN113451817A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115799873A (en) * 2023-02-09 2023-03-14 深圳欧晟科连接技术有限公司 Torsional spring jack with locking mechanism

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115799873A (en) * 2023-02-09 2023-03-14 深圳欧晟科连接技术有限公司 Torsional spring jack with locking mechanism
CN115799873B (en) * 2023-02-09 2023-04-07 深圳欧晟科连接技术有限公司 Torsional spring jack with locking mechanism

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