DC line plug capable of preventing electric arc

Abstract

The utility model discloses an arc-proof DC line plug, which comprises a DC line and a plug, the DC line comprises a positive electrode line and a negative electrode line, the plug comprises an outer tube, an insulator and a terminal, the outer tube is arranged on the outer side of the insulator, the terminal is arranged in the insulator, the negative electrode line is connected with the outer tube in a welding manner, and the outer tube is connected with the insulator in a welding manner. The positive wire is welded and connected with the terminal; the distance from the terminal to one end, far away from the DC wire, of the insulator is greater than the distance from the outer tube to one end, far away from the DC wire, of the insulator; according to the design, the negative wire is switched on before the positive wire, that is, the contact between the plug grounding outer tube and the socket elastic sheet terminal is prior to the contact between the socket center pin and the plug terminal, so that electric arc can be prevented, and the possibility of burnout caused by short circuit of a product is reduced.

Description

Technical Field

[0001] The present application relates to the field of DC line technology, and in particular to an arc-proof DC line plug. Background Art

[0002] A DC power cable, also known as a direct current cable, is a type of electrical wire used to transmit direct current. It primarily consists of a conductor, an insulation layer, a shield, and a protective layer. DC power cables are widely used in digital products, small appliances, and test equipment, primarily for power output and charging various digital products and small appliances. DC power cables are commonly used in electrical devices such as flashlights, small radios, mobile phones, MP3 players, and mosquito swatters. Their diverse uses and affordability make them a significant benefit to our daily lives.

[0003] In the existing technology, the hollow cylindrical metal body on the inner wall of the DC line plug is flush with the plane of the plug head. When high-voltage plugging and unplugging, the contact between the center pin of the socket and the inner wall of the plug takes precedence over the contact between the grounding outer tube of the plug and the spring terminal of the socket. There is a possibility of arcing, which can easily cause the product to short-circuit and burn out. Utility Model Content

[0004] The main purpose of this application is to provide an arc-proof DC line plug, which aims to solve the problem that arcs are easily generated when the existing DC line plug is plugged in or unplugged.

[0005] To achieve the above-mentioned objectives, the arc-proof DC line plug proposed in the present application includes: a DC line and a plug, wherein the DC line includes a positive line and a negative line, and the plug includes an outer tube, an insulator, and a terminal. The outer tube is arranged on the outside of the insulator, and the terminal is arranged inside the insulator. The negative line is welded to the outer tube, and the positive line is welded to the terminal. The distance from the terminal to the end of the insulator away from the DC line is greater than the distance from the outer tube to the end of the insulator away from the DC line.

[0006] Optionally, the insulator is a cylindrical structure made of insulating material, a circular receiving hole is provided inside the insulator, a receiving groove is provided on the side surface of the receiving hole corresponding to the receiving groove, and the terminal is arranged in the receiving groove.

[0007] Optionally, the outer tube is a cylindrical structure made of metal material, the outer tube is sleeved on the outside of the insulator, and the outer tube is fixedly connected to the insulator.

[0008] Optionally, a plurality of annular anti-slip grooves are provided on the outer side of the outer tube at one end away from the DC line.

[0009] Optionally, one end of the terminal is a tuning fork-shaped elastic structure, and a protrusion is symmetrically provided inwardly on the tuning fork-shaped end of the terminal.

[0010] Optionally, the other end of the terminal is a square structure, the other end of the terminal extends to the outside of the insulator, and a connection hole is provided in the middle of the other end of the terminal.

[0011] Optionally, the positive wire passes through the connection hole in a hook shape and is hooked on the terminal, and the positive wire is fixed to the connection hole by welding.

[0012] Optionally, two card slots are provided on the terminal between the tuning fork-shaped structure and the connecting hole, and card blocks are provided inside the insulator at locations corresponding to the two card slots. The two card blocks engage with the card slots to fix the terminal in the insulator.

[0013] Optionally, a notch is provided on the outer side of the insulator close to one end of the DC line, and the notch is used to limit a welding position of the negative line.

[0014] Optionally, a shell is provided on the outside of the connection between the DC line and the plug, and the shell wraps the connection between the DC line and the plug.

[0015] The technical solution of the present application is to provide an outer tube on the outside of the insulator and a terminal on the inside of the insulator, and to make the distance from the terminal to the end of the insulator away from the DC line greater than the distance from the outer tube to the end of the insulator away from the DC line, so that the negative line will be connected before the positive line, that is, the contact between the grounding outer tube of the plug and the spring terminal of the socket takes precedence over the contact between the center pin of the socket and the plug terminal, thereby preventing the generation of arcs and reducing the possibility of short circuit problems and burning of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0017] Figure 1 A schematic diagram of the three-dimensional structure of the arc-proof DC line plug of this application;

[0018] Figure 2 Schematic diagram of the disassembled structure of the DC line plug for arc protection;

[0019] Figure 3 A schematic diagram of the structure of the insulator in the DC line plug for arc protection;

[0020] Figure 4 A schematic diagram of the internal structure of the plug in a DC line plug for arc protection;

[0021] Figure 5 This is a schematic diagram of the state when the plug is inserted into the socket in the embodiment of this solution.

[0022] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0024] It should be noted that when an element is referred to as being “fixed on” or “set on” another component, it can be directly on the other component or indirectly set on the other component; when a component is referred to as being “connected to” another component, it can be directly connected to the other component or indirectly connected to the other component.

[0025] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0026] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if the meaning of "and / or" appearing in the full text is to include three parallel schemes, taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0027] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the efficacy and purpose that can be achieved by this application.

[0028] In the existing technology, the hollow cylindrical metal body on the inner wall of the DC line plug is flush with the plane of the plug head. When high-voltage plugging and unplugging, the contact between the center pin of the socket and the inner wall of the plug takes precedence over the contact between the grounding outer tube of the plug and the spring terminal of the socket. There is a possibility of arcing, which can easily cause the product to short-circuit and burn out.

[0029] In view of this, the present application proposes an arc-proof DC line plug, comprising: a DC line 1 and a plug 2, the DC line 1 comprising a positive line 101 and a negative line 102, the plug 2 comprising an outer tube 210, an insulator 220 and a terminal 230, the outer tube 210 being arranged on the outside of the insulator 220, the terminal 230 being arranged inside the insulator 220, the negative line 102 being welded to the outer tube 210, the positive line 101 being welded to the terminal 230, and the distance from the terminal 230 to the end of the insulator 220 away from the DC line 1 being greater than the distance from the outer tube 210 to the end of the insulator 220 away from the DC line 1.

[0030] In the examples of this application, refer to Figures 1 to 3 The arc-proof DC line plug includes a DC line 1 and a plug 2 , wherein the DC line 1 includes a positive line 101 and a negative line 102 .

[0031] refer to Figure 2 The plug 2 includes an outer tube 210 , an insulator 220 and a terminal 230 . The outer tube 210 is arranged outside the insulator 220 , and the terminal 230 is arranged inside the insulator 220 .

[0032] refer to Figure 3 The insulator 220 is a cylindrical structure made of insulating material. A circular receiving hole 221 is provided inside the insulator. The receiving hole 221 is used to accommodate the center pin 310 inside the socket 3 so that the center pin 310 can be inserted into the insulator 220. An receiving groove 222 is provided on the side of the receiving hole 221 corresponding to the inside of the insulator 220, and the above-mentioned terminal 230 is arranged in the receiving groove 222.

[0033] refer to Figure 2 and Figure 3The outer tube 210 is a cylindrical structure made of metal material. The outer tube 210 is sleeved on the outside of the insulator 220 and is fixedly connected to the insulator 220. A plurality of annular anti-slip grooves 211 are provided on the end of the outer side of the outer tube 210 away from the DC line 1 to prevent the plug 2 from withdrawing by itself when the plug 2 is inserted into the socket 3.

[0034] refer to Figure 2 and Figure 4 The terminal 230 is an elongated structure as a whole. One end of the terminal 230 is a tuning fork-shaped elastic structure. The tuning fork-shaped end of the terminal 230 is used to contact and connect with the center pin 310. The tuning fork-shaped end of the terminal 230 is symmetrically provided with a protrusion 231 facing inward, which is used to clamp the outer side of the center pin 310.

[0035] refer to Figure 2 and Figure 4 The other end of the terminal 230 is a square structure, and the other end of the terminal 230 extends to the outside of the insulator 220. A connecting hole 232 is opened in the middle of the other end of the terminal 230, and the connecting hole 232 is used to connect to the DC line 1.

[0036] refer to Figure 2 and Figure 4 Two card slots 233 are set on the terminal 230 between the tuning fork-shaped structure and the connecting hole 232, and card blocks 223 are set inside the insulator 220 corresponding to the two card slots 233. The terminal 230 is inserted into the insulator 220, and the terminal 230 is fixed in the insulator 220 through the snap-fitting between the two card blocks 223 and the card slots 233.

[0037] refer to Figure 1 and Figure 3 The negative wire 102 is connected to the end of the outer tube 210 close to the DC wire 1 by welding. A notch 224 is provided on the outer side of the insulator 220 close to the end of the DC wire 1. The notch 224 is used to limit the position of the negative wire 102 and facilitate welding of the negative wire 102. The positive wire 101 passes through the connection hole 232 in a hook shape and hooks onto the terminal 230. The positive wire 101 is then fixedly connected to the terminal 230 by welding. A shell (not shown in the figure) is provided on the outside of the connection between the DC wire 1 and the plug 2. The shell wraps the connection between the DC wire 1 and the plug 2, making the connection between the DC wire 1 and the plug 2 more stable.

[0038] refer to Figure 4 The distance between the terminal 230 and the end of the insulator 220 away from the DC line 1 is greater than the distance between the outer tube 210 and the end of the insulator 220 away from the DC line 1. When the plug 2 is inserted into the socket 3, the outer tube 210 will first contact the spring terminal 320 in the socket 3, and then the terminal 230 will contact the center pin 310 inserted into the socket 3, that is, the negative line will be connected before the positive line.

[0039] In summary, when this device is used, refer to Figure 5 , insert the plug 2 into the socket 3, the center pin 310 in the socket 3 will enter the accommodating hole 221 and enter the middle of the tuning fork-shaped structure of the terminal 230, and the spring terminal 320 in the socket 3 will abut against the outer tube 210. During this process, since the distance from the terminal 230 to the end of the insulator 220 away from the DC line 1 is greater than the distance from the outer tube 210 to the end of the insulator 220 away from the DC line 1, the outer tube 210 will first contact the spring terminal 320 in the socket 3, and then the terminal 230 will contact the center pin 310 inserted into the socket 3, that is, the negative line will be connected before the positive line; when the plug 2 is fully inserted into the socket 3, the tuning fork-shaped structure of the terminal 230 will be clamped on the outside of the center pin 310 by the protrusion 231, and the spring terminal 320 in the socket 3 will abut against the anti-slip groove 211 on the outer tube 210, so that the plug 2 and the socket 3 are stably connected.

[0040] The technical solution of the present application is to provide an outer tube on the outside of the insulator and a terminal on the inside of the insulator, and to make the distance from the terminal to the end of the insulator away from the DC line greater than the distance from the outer tube to the end of the insulator away from the DC line, so that the negative line will be connected before the positive line, that is, the contact between the grounding outer tube of the plug and the spring terminal of the socket takes precedence over the contact between the center pin of the socket and the plug terminal, thereby preventing the generation of arcs and reducing the possibility of short circuit problems and burning of the product.

[0041] The above description is merely an optional embodiment of the present application and does not limit the patent scope of the present application. All equivalent structural transformations made using the contents of the present application specification and drawings under the inventive concept of the present application, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. An arc-proof DC line plug, comprising: A DC cable and a plug, wherein the DC cable includes a positive cable and a negative cable, and wherein the plug includes an outer tube, an insulator, and a terminal. The outer tube is disposed outside the insulator, and the terminal is disposed inside the insulator. The negative cable is welded to the outer tube, and the positive cable is welded to the terminal. The distance from the terminal to the end of the insulator away from the DC cable is greater than the distance from the outer tube to the end of the insulator away from the DC cable.

2. The arc-proof DC line plug according to claim 1, characterized in that: The insulator is a cylindrical structure made of insulating material. A circular receiving hole is provided inside the insulator. A receiving groove is provided on a side surface of the receiving hole corresponding to the receiving hole. The terminal is arranged in the receiving groove.

3. The arc-proof DC line plug according to claim 1, wherein: The outer tube is a cylindrical structure made of metal material. The outer tube is sleeved on the outside of the insulator and is fixedly connected to the insulator.

4. The arc-proof DC line plug according to claim 3, characterized in that: A plurality of annular anti-slip grooves are provided on the outer side of the outer tube at one end away from the DC line.

5. The arc-proof DC line plug according to claim 1, wherein: One end of the terminal is a tuning fork-shaped elastic structure, and the tuning fork-shaped end of the terminal is symmetrically provided with protrusions facing inward.

6. The arc-proof DC line plug according to claim 5, characterized in that: The other end of the terminal is a square structure, the other end of the terminal extends to the outside of the insulator, and a connection hole is opened in the middle of the other end of the terminal.

7. The arc-proof DC line plug according to claim 6, wherein: The positive electrode wire is hooked through the connection hole and hooked on the terminal, and the positive electrode wire is fixed to the connection hole by welding.

8. The arc-proof DC line plug according to claim 6, wherein: Two slots are provided on the terminal between the tuning fork-shaped elastic structure and the connecting hole, and clamping blocks are provided inside the insulator at locations corresponding to the two slots. The two clamping blocks are engaged with the slots to fix the terminal inside the insulator.

9. The arc-proof DC line plug according to claim 1, wherein: A notch is formed on the outer side of the insulator near one end of the DC line, and the notch is used to limit the welding position of the negative electrode line.

10. The arc-proof DC line plug according to claim 1, wherein: A shell is provided outside the connection between the DC line and the plug, and the shell wraps the connection between the DC line and the plug.

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