A DC connector

Abstract

The utility model discloses a DC connector, include: connecting body, center needle, center needle is inserted in the connecting body, and the both ends of center needle respectively stretch out the connecting body, and one end of center needle is equipped with the connecting hole, inner tube, inner tube is covered and is equipped on the connecting body, and the other end of center needle stretches out from the end of connecting body and stretches into the inner tube, and the interval of the other end of center needle and the end of connecting body is 3 5mm, the outer wall of one end of connecting body is equipped with arc limit board, and the end of inner tube is inserted between arc limit board and connecting body, first outer tube, first outer tube is covered and is equipped on the inner tube, and the interval of the end of inner tube and first outer tube end is 1 3mm. The center needle of the application is as the positive pole, and the inner tube is as the negative pole, and the first outer tube is suspended, and the center needle does not contact the first outer tube, and the first outer tube does not belong to the electrified part, and even if being touched by the test probe, the electric shock risk does not occur, and the safety of DC connector use is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of connector technology, and more specifically to a DC connector. Background Technology

[0002] Connectors are a very important part of circuit connections. They bridge the gaps in circuits or connect isolated circuits, allowing current to flow and enabling the circuit to perform its intended function.

[0003] As a household appliance, cycling trainers must meet the electric shock protection requirements specified in IEC 60335-1 or GB 4706.1. Since motor-damped cycling trainers typically use power adapters with an output voltage of 48V, which exceeds the extra-low voltage (not exceeding 42V) defined in the aforementioned standards, a No. 13 test probe is required for testing, and the probe must not touch any live parts.

[0004] Currently, commonly used connectors in the industry, such as DC7406, DC5525, and DC5521, fail tests because the test probe can easily touch live parts. This proposal presents a DC connector that meets the aforementioned safety requirements, ensuring that the live parts of the DC connector cannot be touched by the test probe. Summary of the Invention

[0005] The purpose of this invention is to provide a DC connector that can effectively prevent the live parts of the connector from touching the test probe, thus avoiding the risk of electric shock.

[0006] To address this, the present invention provides a DC connector, comprising: a connector body; a center pin inserted into the connector body, with both ends of the center pin extending out of the connector body, and one end of the center pin having a connection hole; an inner tube sleeved on the connector body; the other end of the center pin extending from the end of the connector body and into the inner tube, with a distance of 3-5 mm between the other end of the center pin and the end of the connector body; an arc-shaped limiting plate provided on the outer wall of one end of the connector body, with the end of the inner tube inserted between the arc-shaped limiting plate and the connector body; and a first outer tube sleeved on the inner tube, with a distance of 1-3 mm between the end of the inner tube and the end of the first outer tube.

[0007] Preferably, the connecting body has a through cavity adapted to the central needle, and the central needle is inserted and fixed in the through cavity.

[0008] Preferably, the central angle corresponding to the arc-shaped limiting plate is 100-300°.

[0009] Preferably, the inner wall of the end of the first outer tube is provided with a plurality of equally spaced limiting protrusions, the limiting protrusions abutting against the end of the inner tube, and the limiting protrusions are used to limit the inner tube.

[0010] Preferably, the distance between the end of the connector and the end of the first outer tube is 8-10 mm.

[0011] Preferably, it also includes a second outer tube, which is sleeved on the first outer tube.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows: This utility model discloses a DC connector, including: a connector body; a center pin, which is inserted into the connector body, with both ends of the center pin extending out of the connector body, and one end of the center pin having a connection hole; an inner tube, which is sleeved on the connector body; the other end of the center pin extends from the end of the connector body and into the inner tube, with a distance of 3-5mm between the other end of the center pin and the end of the connector body; an arc-shaped limiting plate is provided on the outer wall of one end of the connector body, and the end of the inner tube is inserted between the arc-shaped limiting plate and the connector body; and a first outer tube, which is sleeved on the inner tube, with a distance of 1-3mm between the end of the inner tube and the end of the first outer tube.

[0013] In this application, the center pin is used as the positive terminal, the inner tube as the negative terminal, and the first outer tube is suspended. The center pin does not contact the first outer tube, and the first outer tube is not a live part. Even if it is touched by the test probe, there will be no risk of electric shock, which effectively improves the safety of DC connector use.

[0014] When the DC connector of this application is tested, the test probe only contacts the inner wall of the first outer tube. The test probe will not touch the center pin and the inner tube, so there is no risk of electric shock, which effectively improves the safety of using the DC connector.

[0015] Other features and advantages of this utility model will become clearer after reading the detailed embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0016] Figure 1 This is one of the structural schematic diagrams of an embodiment of the DC connector of this utility model; Figure 2 This is one of the exploded structural diagrams of an embodiment of the DC connector of this utility model; Figure 3 This is the second exploded view of an embodiment of the DC connector of this utility model; Figure 4 This is the third exploded view of an embodiment of the DC connector of this utility model; Figure 5This is a second schematic diagram of the structure of one embodiment of the DC connector of this utility model; Figure 6 This is a schematic diagram of the structure of one embodiment of the connector of this utility model; Figure 7 This is a cross-sectional schematic diagram of one embodiment of the DC connector of this utility model; Connector 10, through cavity 11, arc-shaped limiting plate 12; Center pin 20, connecting hole 21; Inner tube 30; First outer tube 40, limiting protrusion 41; Second outer tube 50, reinforcing ring 51. Detailed Implementation

[0017] 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.

[0018] like Figures 1-7 As shown, the DC connector of this application includes a connector body 10, a center pin 20, an inner tube 30, a first outer tube 40, and a second outer tube 50.

[0019] The center pin 20 is made of brass, which has good conductivity, ensuring current carrying capacity, extending insertion and removal life, and avoiding poor contact.

[0020] In this application, the center pin 20 is used as the positive terminal, the inner tube 30 is used as the negative terminal, the first outer tube 40 is suspended, the center pin 20 does not contact the first outer tube 40, the first outer tube 40 is not a live part, and even if it is touched by the test probe, there will be no risk of electric shock, effectively improving the safety of DC connector use.

[0021] When the DC connector of this application is tested, the test probe only contacts the inner wall of the first outer tube 40. The test probe will not touch the center pin 20 and the inner tube 30, so there is no risk of electric shock and the safety of using the DC connector is effectively improved.

[0022] The center pin 20 is inserted into the connector 10. The connector 10 has a through cavity 11 that is adapted to the center pin 20. The center pin 20 is inserted and fixed in the through cavity 11.

[0023] The center pin 20 is fixedly fitted inside the through cavity 11. The fixing method can be a common fixing method in this technical field, and no specific limitation is made here.

[0024] The two ends of the center pin 20 extend out of the connector 10 respectively. One end of the center pin 20 is provided with a connection hole 21, which facilitates wiring of the connector pin 20.

[0025] The connector 10 can be cylindrical, and the inner tube 30 is a hollow cylinder with openings at both ends. The inner tube 30 is sleeved on the connector 10, and the fixing method can be a common fixing method in this technical field, without specific limitations.

[0026] The other end of the center pin 20 extends from the end of the connector 10 and into the inner tube 30. The distance M between the other end of the center pin 20 and the end of the connector 10 is 3-5 mm. Figure 7 As shown, the other end of the center pin 20 refers to the left end of the center pin 20, and the end of the connector 10 refers to the left end of the connector 10. The left end of the center pin 20 extends beyond the left end of the connector 10, and the length of the left end of the center pin 20 extending beyond the left end of the connector 10 is M, where M is 3-5mm, preferably 3.5-4.5mm, which can prevent the left end of the center pin 20 from being touched by the test probe and avoid electric shock.

[0027] An arc-shaped limiting plate 12 is provided on the outer wall of one end of the connector 10. The connector 10 and the arc-shaped limiting plate 12 can be integrally formed by processing technology.

[0028] The end of the inner tube 30 is inserted between the arc-shaped limiting plate 12 and the connecting body 10. The arc-shaped limiting plate 12 can limit and fix the inner tube 30, ensuring that the inner tube 30 can be stably and effectively sleeved on the connecting body 10.

[0029] The distance d between the inner wall of the arc-shaped limiting plate 12 and the outer wall of the connector 10 can be equal to the thickness of the inner tube 30, or the distance d between the inner wall of the arc-shaped limiting plate 12 and the outer wall of the connector 10 can be 0.5-2mm larger than the thickness of the inner tube 30, so as to play a stable and effective limiting and fixing role for the inner tube 30.

[0030] The thickness of the inner tube 30 is equal to the difference between the outer diameter and the inner diameter of the inner tube 30.

[0031] The central angle of the arc-shaped limiting plate 12 is 100-300°, preferably 150-200°, so that the inner tube 30 can be stably and effectively limited and fixed.

[0032] The first outer tube 40 is fixedly sleeved on the inner tube 30, and the first outer tube 40 and the arc-shaped limiting plate 12 are in contact with each other, so as to limit and guide the installation of the first outer tube 40.

[0033] The distance N between the end of the inner tube 30 and the end of the first outer tube 40 is 1-3mm, such as... Figure 7As shown, the end of the inner tube 30 refers to the left end of the inner tube 30, and the end of the first outer tube 40 refers to the left end of the first outer tube 40. The distance N between the left end of the inner tube 30 and the left end of the first outer tube 40 is 1-3mm, preferably 1.5-2.5mm, which can prevent the inner tube 30 from being touched by the test probe and avoid electric shock.

[0034] The inner wall of the end of the first outer tube 40 is provided with a plurality of equally spaced limiting protrusions 41. The limiting protrusions 41 abut against the end of the inner tube 30 and are used to limit the inner tube 30.

[0035] The first outer tube 40 and the limiting protrusion 41 can be integrally formed by processing technology. The limiting protrusion 41 is arc-shaped and is set along the inner wall of the first outer tube 40.

[0036] The distance T between the end of the connector 10 and the end of the first outer tube 40 is 8-10 mm, such as Figure 7 As shown, the end of connector 10 refers to the left end of connector 10, and the end of first outer tube 40 refers to the left end of first outer tube 40. The distance T between the left end of connector 10 and the left end of first outer tube 40 is 8-10mm, preferably 8-9.5mm; this makes the DC connector structure of this application stable and reliable, and facilitates the mating of connector and female socket.

[0037] like Figure 7 As shown, the left end of the first outer tube 40 is open, and the edge of the opening is set as a rounded corner structure, which can facilitate the plugging and mating of the connector and the female socket.

[0038] The DC connector of this application includes a second outer tube 50, which is fixedly sleeved on a first outer tube 40. The second outer tube 50 and the first outer tube 40 can be integrally formed by a processing technology, or the second outer tube 50 can be fixed on the first outer tube 40 by a method common in the art, and no specific limitation is made herein.

[0039] By setting the second outer tube 50, the connector can be protected, effectively preventing the first inner tube 40 from being worn and damaged, extending the service life of the first inner tube 40, and improving the structural strength of the first inner tube 40.

[0040] The outer wall of the second outer tube 50 is provided with a protruding reinforcing ring 51. During the overmolding process, the protruding reinforcing ring 51 can make the DC connector and the plastic bond more firmly.

[0041] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by this utility model.

Claims

1. A DC connector, characterized in that, include: Connector; A center pin is inserted into the connecting body, with both ends of the center pin extending out of the connecting body, and one end of the center pin having a connecting hole. The inner tube is sleeved on the connector; the other end of the center pin extends from the end of the connector and into the inner tube, and the distance between the other end of the center pin and the end of the connector is 3-5mm. An arc-shaped limiting plate is provided on the outer wall of one end of the connector, and the end of the inner tube is inserted between the arc-shaped limiting plate and the connector; The first outer tube is sleeved on the inner tube, and the distance between the end of the inner tube and the end of the first outer tube is 1-3 mm.

2. The DC connector as described in claim 1, characterized in that, The connecting body has a through cavity adapted to the central needle, and the central needle is inserted and fixed in the through cavity.

3. The DC connector as described in claim 1, characterized in that, The central angle corresponding to the arc-shaped limiting plate is 100-300°.

4. The DC connector as described in claim 1, characterized in that, The inner wall of the first outer tube end is provided with a plurality of equally spaced limiting protrusions. The limiting protrusions abut against the end of the inner tube and are used to limit the inner tube.

5. The DC connector as described in claim 1, characterized in that, The distance between the end of the connector and the end of the first outer tube is 8-10 mm.

6. The DC connector as claimed in claim 1, characterized in that, It also includes a second outer tube, which is sleeved on the first outer tube.

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