A fool-proof connector for high current

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By designing unequal spacing between the pins and the center distance of the socket terminals on the male and female connectors, the short circuit problem caused by reverse insertion is solved, enabling successful forward insertion of the foolproof connector and avoiding structural deformation and short circuit risks.

CN224305084UActive Publication Date: 2026-05-29DONGGUAN SHIYU JINGYAN ELECTRONICS CO LTD

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Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: DONGGUAN SHIYU JINGYAN ELECTRONICS CO LTD
Filing Date: 2025-07-17
Publication Date: 2026-05-29

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Abstract

The utility model provides a large current fool -proof connector, including the male head inside setting up male rubber core, the circle center distance of first PIN and third PIN is same with the circle center distance of second PIN and fourth PIN, the circle center distance of first PIN and second PIN is not same with the circle center distance of third PIN and fourth PIN, the female head inside setting up female rubber core, the circle center distance of first jack terminal and third jack terminal is same with the circle center distance of second jack terminal and fourth jack terminal, the circle center distance of first jack terminal and second jack terminal is not same with the circle center distance of third jack terminal and fourth jack terminal, its beneficial effect is, when the male head and female head of connector are inserted, because the distance between PIN, jack terminal of male head and female head is not same, only in the case of positive insertion, the PIN of male head can be inserted into the jack terminal of female head accurately and realizes the connection, and in the case of reverse insertion, the connection of male head and female head cannot be realized, thereby realizing the situation that the short circuit caused by the reverse insertion of male head and female head is avoided.

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Description

Technical Field

[0001] This utility model relates to, but is not limited to, the field of connectors, and in particular to a high-current foolproof connector. Background Technology

[0002] Connectors typically connect two active devices using male and female connectors to enable signal or current transmission between them.

[0003] Currently, the pins of the male and female connectors are equidistant in both the vertical and horizontal directions. They typically use a convex-concave mating structure at the joint between the male and female connectors to prevent incorrect connection during insertion. This insertion needs to be performed under visual conditions. However, under non-visual conditions, forceful insertion can lead to reverse insertion. Forced insertion can deform the convex-concave mating structure, allowing the male and female pins to come into contact during reverse insertion, which can pose a short circuit risk. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a high-current foolproof connector, which solves the technical problem that the PINs of the male and female connectors are equidistant in the vertical and horizontal directions, and can make contact with each other when they are plugged in reverse, which will cause a short circuit.

[0006] (II) Technical Solution

[0007] The purpose of this utility model is to provide a high-current foolproof connector, which includes:

[0008] The male connector has a male end core inside, and the male end core has a first PIN, a second PIN, a third PIN, and a fourth PIN. The center distance between the first PIN and the third PIN is the same as the center distance between the second PIN and the fourth PIN, and the center distance between the first PIN and the second PIN is different from the center distance between the third PIN and the fourth PIN.

[0009] The female connector has a female end core inside, and the female end core has a first socket terminal, a second socket terminal, a third socket terminal, and a fourth socket terminal. The center distance between the first and third socket terminals is the same as that between the second and fourth socket terminals, but the center distance between the first and second socket terminals is different from that between the third and fourth socket terminals.

[0010] Preferably, the center distance between the first PIN and the third PIN and the center distance between the second PIN and the fourth PIN is D1, the center distance between the first PIN and the second PIN is D2, and the center distance between the third PIN and the fourth PIN is D3, wherein D2 is 7cm larger than D3.

[0011] Preferably, the center distance between the first PIN and the third PIN and the center distance between the second PIN and the fourth PIN is D1, the center distance between the first PIN and the second PIN is D2, and the center distance between the third PIN and the fourth PIN is D3, wherein D2 is 7cm smaller than D3.

[0012] Preferably, the center distance between the first and third socket terminals and the center distance between the second and fourth socket terminals is D11, the center distance between the first and second socket terminals is D22, and the center distance between the third and fourth socket terminals is D33, wherein D22 is 7cm larger than D33.

[0013] Preferably, the center distance between the first and third socket terminals and the center distance between the second and fourth socket terminals is D11, the center distance between the first and second socket terminals is D22, and the center distance between the third and fourth socket terminals is D33, wherein D22 is 7cm smaller than D33.

[0014] Preferably, the male head further includes a housing, inside which are a metal upper cover and a metal lower cover that interlock. The metal lower cover is provided with a plastic steel limiting member and a spring on the outside. The metal lower cover is provided with a second rubber core inside, and a second terminal is provided inside the second rubber core. An inner rubber shell is provided at the interlocking point of the metal upper cover and the metal lower cover, and a tail sleeve is connected to the end of the inner rubber shell.

[0015] Preferably, the female connector further includes a metal cover and a grounding copper tube, the grounding copper tube being disposed at the upper end of the metal cover, and the male connector core being disposed inside the metal cover.

[0016] Preferably, the maximum current passing through the first PIN, second PIN, third PIN and fourth PIN is 15A.

[0017] (III) Beneficial Effects

[0018] When the male and female connectors are mated, the distances between the pins and socket terminals of the male and female connectors are different. Only when they are mated in the correct orientation can the pins of the male connector be accurately inserted into the socket terminals of the female connector to achieve a connection. When they are mated in the reverse orientation, the male and female connectors cannot be connected. This is to avoid short circuits caused by reverse mating of the male and female connectors. Attached Figure Description

[0019] The accompanying drawings are provided to further understand the technical solution of this utility model and constitute a part of the specification. They are used together with the embodiments of this utility model to explain the technical solution of this utility model, and do not constitute a limitation on the technical solution of this utility model.

[0020] Figure 1 This is a diagram of the overall structure of a high-current foolproof connector;

[0021] Figure 2 This is a left view of an embodiment of a male connector for a high-current foolproof connector, illustrating that D2 is less than D3;

[0022] Figure 3 This is a left view of another embodiment of the male connector for high current foolproof connector, illustrating a schematic diagram where D2 is greater than D3;

[0023] Figure 4 This is a half-sectional view of the male connector of a high-current foolproof connector;

[0024] Figure 5 This is a right view of an embodiment of a female connector for a high-current foolproof connector, illustrating that D22 is less than D33;

[0025] Figure 6 This is a right view of another embodiment of the female connector of the high current foolproof connector, illustrating that D22 is greater than D33;

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Male connector; 1a. First PIN; 1b. Second PIN; 1c. Third PIN; 1d. Fourth PIN; 12. Male end core; 13. Metal lower cover; 14. Metal upper cover; 15. Plastic steel limiting component; 16. Spring; 17. Inner shell; 18. Outer shell; 19. Tail sleeve; 2. Female connector; 2a. First socket terminal; 2b. Second socket terminal; 2c. Third socket terminal; 2d. Fourth socket terminal; 21. Female end core; 22. Metal protective cover; 23. Grounding copper tube. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0029] The following is in conjunction with the appendix Figures 1 to 6To further describe, this utility model discloses a high-current foolproof connector, including a male connector 1, a male end core 12 disposed inside the male connector 1, and a first PIN1a, a second PIN1b, a third PIN1c and a fourth PIN1d disposed inside the male end core 12. The center distance between the first PIN1a and the third PIN1c is the same as the center distance between the second PIN1b and the fourth PIN1d. The center distance between the first PIN1a and the second PIN1b is not the same as the center distance between the third PIN1c and the fourth PIN1d. For example, the center distance between the first PIN1a and the second PIN1b is greater than or less than the center distance between the third PIN1c and the fourth PIN1d.

[0030] The female connector 2 has a female end core 21 inside. The female end core 21 has a first socket terminal 2a, a second socket terminal 2b, a third socket terminal 2c, and a fourth socket terminal 2d inside. The center distance between the first socket terminal 2a and the third socket terminal 2c is the same as the center distance between the second socket terminal 2b and the fourth socket terminal 2d. The center distance between the first socket terminal 2a and the second socket terminal 2b is not the same as the center distance between the third socket terminal 2c and the fourth socket terminal 2d. For example, the center distance between the first socket terminal 2a and the second socket terminal 2b is greater than or less than the center distance between the third socket terminal 2c and the fourth socket terminal 2d.

[0031] In a preferred embodiment, the center distance between the first PIN1a and the third PIN1c and the center distance between the second PIN1b and the fourth PIN1d is D1, the center distance between the first PIN1a and the second PIN1b is D2, and the center distance between the third PIN1c and the fourth PIN1d is D3.

[0032] In a preferred embodiment, the center-to-center distance between the first socket terminal 2a and the third socket terminal 2c and the center-to-center distance between the second socket terminal 2b and the fourth socket terminal 2d is D11, the center-to-center distance between the first socket terminal 2a and the second socket terminal 2b is D22, and the center-to-center distance between the third socket terminal 2c and the fourth socket terminal 2d is D33.

[0033] In a preferred embodiment, the center distance between the first PIN1a and the third PIN1c and the center distance between the second PIN1b and the fourth PIN1d is D1, the center distance between the first PIN1a and the second PIN1b is D2, and the center distance between the third PIN1c and the fourth PIN1d is D3, wherein D2 is 7cm smaller than D3.

[0034] In a preferred embodiment, the center distance between the first socket terminal 2a and the third socket terminal 2c and the center distance between the second socket terminal 2b and the fourth socket terminal 2d is D11, the center distance between the first socket terminal 2a and the second socket terminal 2b is D22, and the center distance between the third socket terminal 2c and the fourth socket terminal 2d is D33, wherein D22 is 7cm smaller than D33.

[0035] In this embodiment, when D1 and D11 are the same, the lengths of D2 and D22 are equal, and the lengths of D3 and D33 are equal. When D2 is 7cm larger than D3, then D22 is 7cm larger than D33. At this time, the male head 1 and the female head 2 are compatible.

[0036] When D1 and D11 are the same, D2 and D22 are equal in length, and D3 and D33 are equal in length. When D2 is 7cm smaller than D3, then D22 is 7cm smaller than D33. In this case, male head 1 and female head 2 are compatible.

[0037] In a preferred embodiment, the male head 1 further includes a housing 18, inside which are disposed a metal upper cover 14 and a metal lower cover 13 that are interlocked. The metal lower cover 13 is provided with a plastic steel limiting member 15 and a spring 16 on the outside. The metal lower cover 13 is provided with a second rubber core inside, and a second terminal is provided inside the second rubber core. An inner rubber shell 17 is provided on the interlocking part of the metal upper cover 14 and the metal lower cover 13, and a tail sleeve 19 is connected to the end of the inner rubber shell 17.

[0038] In a preferred embodiment, the female connector 2 further includes a metal cover 22 and a grounding copper tube 23. The grounding copper tube 23 is disposed at the upper end of the metal cover 22, and the male end rubber core 12 is disposed inside the metal cover 22.

[0039] In a preferred embodiment, the maximum current passing through the first PIN, second PIN, third PIN, and fourth PIN is 15A.

[0040] In summary, the mounting structure of the male and female connectors can refer to existing technologies. When the male and female connectors are mated, because the distances between the pins and socket terminals of the male and female connectors are different, the first, second, third, and fourth pins of the male connector can be accurately inserted into the first, second, third, and fourth socket terminals of the female connector to achieve connection only when they are mated in the correct orientation. However, when they are mated in the reverse orientation, the pins of the male connector will abut against the female connector's core, and the connection between the male and female connectors cannot be achieved. This is to avoid short circuits caused by reverse mating of the male and female connectors.

[0041] Although embodiments of the present invention have been shown above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications and variations to the above embodiments, but such modifications are all included within the broad scope of the foregoing disclosure, drawings and claims.

Claims

1. A high-current foolproof connector, characterized in that... ,include: The male connector has a male end core inside, and the male end core has a first PIN, a second PIN, a third PIN, and a fourth PIN. The center distance between the first PIN and the third PIN is the same as the center distance between the second PIN and the fourth PIN, and the center distance between the first PIN and the second PIN is different from the center distance between the third PIN and the fourth PIN. The female connector has a female end core inside, and the female end core has a first socket terminal, a second socket terminal, a third socket terminal, and a fourth socket terminal. The center distance between the first and third socket terminals is the same as that between the second and fourth socket terminals, but the center distance between the first and second socket terminals is different from that between the third and fourth socket terminals.

2. The high-current foolproof connector according to claim 1, characterized in that: The center distance between the first PIN and the third PIN and the center distance between the second PIN and the fourth PIN is D1, the center distance between the first PIN and the second PIN is D2, and the center distance between the third PIN and the fourth PIN is D3. D2 is 7cm larger than D3.

3. The high-current foolproof connector according to claim 1, characterized in that: The center distance between the first PIN and the third PIN and the center distance between the second PIN and the fourth PIN is D1, the center distance between the first PIN and the second PIN is D2, and the center distance between the third PIN and the fourth PIN is D3. D2 is 7cm smaller than D3.

4. The high-current foolproof connector according to claim 1, characterized in that: The center distance between the first and third socket terminals and the center distance between the second and fourth socket terminals is D11, the center distance between the first and second socket terminals is D22, and the center distance between the third and fourth socket terminals is D33. D22 is 7cm larger than D33.

5. The high-current foolproof connector according to claim 1, characterized in that: The center distance between the first and third socket terminals and the center distance between the second and fourth socket terminals is D11, the center distance between the first and second socket terminals is D22, and the center distance between the third and fourth socket terminals is D33. D22 is 7cm smaller than D33.

6. The high-current foolproof connector according to claim 1, characterized in that: The male head also includes a housing, inside which are a metal upper cover and a metal lower cover that interlock. The metal lower cover is provided with a plastic steel limiting component and a spring on the outside. The metal lower cover is provided with a second rubber core inside, and a second terminal is provided inside the second rubber core. An inner rubber shell is provided at the interlocking point of the metal upper cover and the metal lower cover, and a tail sleeve is connected to the end of the inner rubber shell.

7. The high-current foolproof connector according to claim 1, characterized in that: The female connector also includes a metal cover and a grounding copper pipe, with the grounding copper pipe located at the upper end of the metal cover and the male connector core located inside the metal cover.

8. The high-current foolproof connector according to claim 1, characterized in that: The maximum current that can pass through the first PIN, second PIN, third PIN and fourth PIN is 15A.