Cylinder type terminal

Abstract

The utility model discloses a cylindrical terminal, which comprises a terminal body and an injection molding assembly arranged in the terminal body, and is characterized in that the terminal body comprises a plugging part, a fixing part and a wiring part which are connected in sequence, and a through cavity is arranged in the terminal body; the injection molding assembly comprises a sealing piece and an anti-touch rod, the anti-touch rod penetrates through the sealing piece, the sealing piece is arranged in the fixing part and is circumferentially connected with the inner wall of the cavity, a set distance is formed between the anti-touch rod and the inner wall of the cavity, and mounting grooves are formed in the positions, corresponding to the middle and / or the two ends of the sealing piece, of the fixing part; a first annular protrusion is arranged at the position, corresponding to the inner wall of the cavity, of the mounting groove and used for fixing the injection molding assembly in the cavity. According to the utility model, the injection molding assembly is arranged in the terminal body, the sealing element in the assembly can play a sealing role to prevent water vapor from entering the cavity to influence the electric connection between the plugging part and the matched terminal, the anti-touch rod plays an anti-electric shock role, and the annular contact spring provides elastic contact to prevent electric shock. And the condition that the contact part is abraded due to non-concentricity during rigid plugging contact of the terminal is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicles, and more specifically, to a barrel terminal. Background Art

[0002] With the rapid development of new energy electric vehicles, the use of terminals for electrical connection is increasing. The terminals used in charging guns and charging seats are mainly used to transmit electrical signals or conduct electricity. The terminals need to be plugged into mating terminals to achieve electrical connection. When the mating terminals are not plugged in, the cavity of the plug-in part of the terminal has an opening, and the opening is not covered in a fully open state, so it is easy for fingers to accidentally enter and cause the risk of electric shock. Traditional barrel terminals are formed by stamping and curling the sheet metal into one piece. The terminals are prone to excessive burrs, deformation, surface scratches, collapse, cracking, wrinkling, and hair pulling, etc., which are not only unsightly in appearance, but also affect the strength and use of the terminals. When the traditional barrel terminals and the mating terminals are rigidly plugged in, the terminals are not concentric, resulting in severe wear at the contact point, which in turn leads to increased resistance, increased operating temperature, and decreased power transmission.

[0003] Therefore, a new solution is urgently needed in the prior art to solve the above problems. Utility Model Content

[0004] One purpose of the utility model is to provide a new technical solution for barrel-type terminals to solve the problems that when the terminal is not plugged in with a mating terminal, the cavity of the plug-in portion of the terminal has an opening, the opening is not covered and is in a fully open state, and it is easy for fingers to enter by mistake and cause the risk of electric shock; the stamped terminal has an unsightly appearance and low structural strength; and when a traditional barrel-type terminal and a mating terminal are rigidly plugged in and contacted, the terminals are not concentric, resulting in severe wear at the contact point.

[0005] According to the utility model, a barrel-type terminal is provided for plugging with a mating terminal, comprising a terminal body and an injection molding component arranged in the terminal body, the terminal body comprising a plug-in portion, a fixing portion and a wiring portion connected in sequence, a through cavity being arranged in the terminal body; the injection molding component comprises a sealing member and an anti-touch rod, the anti-touch rod passes through the sealing member, the sealing member is arranged in the fixing portion and is circumferentially connected to the inner wall of the cavity, the anti-touch rod has a set distance from the inner wall of the cavity, the fixing portion is provided with an installation groove at the middle and / or both ends of the sealing member, the installation groove is provided with a first annular protrusion at a corresponding position of the inner wall of the cavity for fixing the injection molding component in the cavity.

[0006] Optionally, the anti-touch rod, the sealing member and the terminal body are coaxially arranged.

[0007] Optionally, one end of the anti-touch rod is exposed outside the plug-in portion, and the other end passes through the sealing member and enters into the fixing portion, but does not enter into the wiring portion.

[0008] Optionally, the sealing element and the anti-touch rod are integrally injection molded.

[0009] Optionally, the installation groove is arranged on the fixing portion corresponding to the middle portion of the sealing member, and an annular groove is arranged on the outer periphery of the sealing member corresponding to the installation groove.

[0010] Optionally, a plurality of the mounting grooves are spaced apart along the axial direction of the terminal body, and a sealing ring is sleeved in at least one of the mounting grooves.

[0011] Optionally, the fixing portion is further provided with a clamping groove spaced apart from the mounting groove for clamping with a fixing position.

[0012] Optionally, it also includes an annular contact spring arranged in the cavity at the position of the plug-in portion, wherein the annular contact spring is a waist drum-shaped structure that is thick at both ends and thin in the middle. Corresponding to the positions of the two ends of the annular contact spring, a second annular protrusion is arranged inside the cavity to confine the annular contact spring within the cavity.

[0013] Optionally, the annular contact spring has a plurality of spring sheets spaced circumferentially therefrom, the plurality of spring sheets surround and form a contact cavity that wraps the mating terminal, and the distance between the outer periphery of the annular contact spring and the inner wall of the cavity gradually decreases from the smallest diameter in the middle of the annular contact spring to both ends until they abut.

[0014] Optionally, along the axial direction of the terminal body, at least one end of the annular contact spring has a set distance from the second annular protrusion.

[0015] The beneficial effects of the utility model are:

[0016] 1. The utility model makes the seal and the anti-touch rod into the form of an injection molding component. The anti-touch rod penetrates the seal. The terminal body has a through cavity and includes a plug-in portion, a fixing portion and a wiring portion connected in sequence. The fixing portion is provided with a mounting groove at the middle and / or both ends of the seal. The mounting groove is provided with a first annular protrusion at a corresponding position on the inner wall of the cavity to fix the seal in the cavity, and then fix the anti-touch rod in the cavity. The seal in the integrated injection molding component plays a sealing role to prevent water vapor from entering the cavity to affect the electrical connection between the wiring portion and the cable and the electrical connection between the plug-in portion and the mating terminal. The anti-touch rod can also prevent fingers from mistakenly entering the cavity of the terminal body from the outside of the plug-in portion to prevent electric shock.

[0017] 2. This design is formed into a cylindrical terminal through a rolling process. After rolling, the cylindrical terminal has high structural strength, improved mechanical properties and mechanical properties, and is not easy to be bumped and deformed. It meets the plug-in strength requirements of the terminal and the mating terminal and the electrical connection requirements with the conductive part of the cable. It solves the problem that the traditional cylindrical terminal is formed by stamping and curling the plate, and the terminal is prone to excessive burrs, deformation, surface scratches, collapse, cracking, wrinkling, and hair pulling, etc. The appearance defects are not only unsightly, but also affect the strength and use of the terminal. In addition, when the traditional cylindrical terminal and the mating terminal are rigidly plugged in, the terminals are not concentric, resulting in severe wear at the contact point, which in turn leads to increased resistance, increased operating temperature, and decreased power transmission.

[0018] 3. An annular contact spring is arranged in the cavity at the plug-in position. The annular contact spring can make the terminals connected to each other have a greater plug-in force, can firmly clamp the mating terminals, ensure the stability of signal transmission, and can also provide elastic contact to prevent the barrel terminal and the mating terminal from being non-concentric when rigidly plugged in, resulting in serious wear at the contact point, thereby causing problems such as increased resistance, increased operating temperature, and decreased power transmission power.

[0019] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0021] Figure 1 This is a structural schematic diagram of a barrel-type terminal of the utility model;

[0022] Figure 2 It is a structural schematic diagram of a barrel-type terminal of the utility model after partial cross-section;

[0023] Figure 3 This is a structural schematic diagram of the utility model in which mounting grooves are arranged at both ends of the fixing part corresponding to the sealing member;

[0024] Figure 4 It is a structural schematic diagram of the utility model in which at least one end of the annular contact spring has a set distance from the second annular protrusion along the axial direction of the terminal body.

[0025] The following are marked in the figure:

[0026] 1. Terminal body; 11. Plug-in portion; 111. Second annular protrusion; 12. Fixing portion; 121. Clamping groove; 122. Mounting groove; 1221. First annular protrusion; 13. Wiring portion; 14. Cavity; 2. Sealing element; 3. Anti-touch rod; 4. Annular contact spring. DETAILED DESCRIPTION

[0027] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0028] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0029] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0030] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0031] According to the first aspect of the present utility model, Figure 1-Figure 3 As shown, a barrel terminal is provided for plugging with a mating terminal, comprising a terminal body 1 and an injection molding component arranged in the terminal body 1, wherein the terminal body 1 comprises a plug-in portion 11, a fixing portion 12 and a wiring portion 13 connected in sequence, and a through cavity 14 is arranged in the terminal body 1; the injection molding component comprises a sealing member 2 and an anti-touch rod 3, wherein the anti-touch rod 3 penetrates the sealing member 2, the sealing member 2 is arranged in the fixing portion 12 and is circumferentially connected to the inner wall of the cavity 14, the anti-touch rod 3 has a set distance from the inner wall of the cavity 14, the fixing portion 12 is provided with an installation groove 122 at the middle and / or both ends of the sealing member 2, and the installation groove 122 is provided with a first annular protrusion 1221 at a corresponding position of the inner wall of the cavity 14 to fix the injection molding component in the cavity 14.

[0032] With the rapid development of new energy electric vehicles, the use of terminals for electrical connection is increasing. The terminals used in charging guns and charging stations are mainly used to transmit electrical signals or conduct electricity. The terminals need to be plugged in with the mating terminals to achieve electrical connection. When the mating terminals are not plugged in, the cavity 14 of the plug-in portion 11 of the terminal has an opening, and the opening is not covered in a fully open state, which can easily cause the risk of electric shock if fingers are accidentally inserted. Traditional barrel terminals are formed by stamping and curling the sheet metal into one piece. The barrel terminals are prone to appearance defects such as excessive burrs, deformation, surface scratches, collapse, cracking, wrinkling, and hair pulling, which are not only unsightly in appearance, but also affect the strength and use of the terminals.

[0033] The utility model makes the seal 2 and the anti-touch rod 3 into the form of an injection molding component, the anti-touch rod 3 penetrates the seal 2, the terminal body 1 has a through cavity 14 and includes a plug-in portion 11, a fixing portion 12 and a wiring portion 13 connected in sequence, the fixing portion 12 is provided with a mounting groove 122 at the middle and / or both ends of the seal 2, the mounting groove 122 is provided with a first annular protrusion 1221 at a corresponding position of the inner wall of the cavity 14 to fix the seal 2 in the cavity 14, and then fix the anti-touch rod 3 in the cavity 14, the seal 2 in the integrated injection molding component plays a sealing role, prevents water vapor from entering the cavity 14 to affect the electrical connection between the wiring portion 13 and the cable and the electrical connection between the plug-in portion 11 and the mating terminal, and the anti-touch rod 3 can also prevent fingers from mistakenly entering the cavity 14 of the terminal body 1 from the outside of the plug-in portion 11 to prevent electric shock.

[0034] The barrel terminal of the utility model is integrally formed by a rolling process. The advantage of rolling the barrel shape is that the rolling fully compacts and flattens the material, which can effectively reduce the convexities and concavities on the surface of the barrel terminal, making the product smoother and more beautiful. At the same time, rolling can also ensure the density and strength of the material, and improve the quality and service life of the barrel terminal product. Compared with other processing equipment, the roller press has the advantage of low manufacturing cost, and the use of the roller press for processing can significantly improve production efficiency, reduce production costs, make the processing process faster and more convenient, and avoid errors that may occur in manual operation.

[0035] Moreover, after roll forming, the barrel terminal has high structural strength, improved mechanical properties and mechanical properties, and is not easy to be bumped and deformed, meeting the plug-in strength requirements of the terminal and the mating terminal and the electrical connection requirements with the conductive part of the cable. It solves the problem that the traditional barrel terminal is formed by stamping and curling the plate in one piece, and the terminal is prone to excessive burrs, deformation, surface scratches, collapse, cracking, wrinkling, hair pulling, and other appearance defects, which are not only unsightly in appearance but also affect the strength and use of the terminal. In addition, when the traditional barrel terminal and the mating terminal are rigidly plugged in, the terminals are not concentric, resulting in severe wear at the contact point, which in turn leads to increased resistance, increased operating temperature, and decreased power transmission.

[0036] In some embodiments, the anti-touch rod 3 , the sealing member 2 , and the terminal body 1 are coaxially arranged.

[0037] The anti-touch rod 3 , the sealing member 2 and the terminal body 1 are coaxially arranged, so that the mating terminal can be mated into the plug-in portion 11 along the axis without being interfered by the anti-touch rod 3 during the insertion process of the mating terminal.

[0038] In some embodiments, Figure 2 As shown, one end of the anti-touch rod 3 is exposed outside the plug-in portion 11 , and the other end penetrates the sealing member 2 and enters into the fixing portion 12 , but does not enter into the wiring portion 13 .

[0039] One end of the anti-touch rod 3 is exposed outside the plug-in portion 11, which is convenient for the operator to observe and serves as a reminder to prevent fingers from accidentally entering the cavity 14 and causing the risk of electric shock. It does not enter the wiring portion 13 to avoid affecting the electrical connection between the conductive part of the cable and the wiring portion 13, and provides sufficient space for the conductive part of the cable to extend into the wiring portion 13.

[0040] In some embodiments, Figure 2 As shown, the sealing member 2 and the anti-touch rod 3 are integrally injection molded.

[0041] The seal 2 and the anti-touch rod 3 are integrally injection-molded and installed in the cavity 14 as a whole. This design is not only convenient for assembly, but also enables the anti-touch rod 3 to be indirectly fixed by fixing the seal 2 in the subsequent process.

[0042] In some embodiments, Figure 1-Figure 3 As shown, the installation groove 122 is arranged on the fixing portion 12 corresponding to the middle portion of the sealing member 2 , and an annular groove is arranged on the outer periphery of the sealing member 2 corresponding to the installation groove 122 .

[0043] The first annular protrusion on the inner wall of the cavity 14 corresponding to the installation groove 122 on the fixing part 12 in the middle of the seal 2 is clamped with the annular groove on the outer periphery of the seal 2 to fix the seal 2 on the fixing part 12 and further fix the injection molding component in the cavity 14.

[0044] In some embodiments, Figure 1 As shown, a plurality of the mounting grooves 122 are arranged at intervals along the axial direction of the terminal body 1 , and a sealing ring is sleeved in at least one of the mounting grooves 122 .

[0045] The multiple installation grooves 122 can be used to place sealing rings to seal between the sealing terminal and the installation position, and the installation grooves 122 can also fix the sealing member 2 and meet other usage and installation requirements.

[0046] In some embodiments, Figure 1As shown, the fixing portion 12 is further provided with a clamping groove 121 spaced apart from the mounting groove 122 for clamping with a fixed position.

[0047] The clamping groove 121 is clamped with the fixed position to fix the barrel terminal at the fixed position, so as to facilitate plugging with the mating terminal for electrical connection and transmission of electrical signals.

[0048] In some embodiments, Figure 2 As shown, it also includes an annular contact spring 4 arranged in a cavity 14 at the position of the plug-in portion 11. The annular contact spring 4 is a waist drum-shaped structure with thick ends and a thin middle. Corresponding to the positions of the two ends of the annular contact spring 4, a second annular protrusion 111 is arranged inside the cavity 14 to confine the annular contact spring 4 in the cavity 14.

[0049] The annular contact spring 4 can make the terminals that are connected to each other have a greater plugging force, can firmly clamp the mating terminals, ensure the stability of signal transmission, and provide elastic contact to prevent the cylindrical terminal and the mating terminal from being non-concentric when rigidly plugged into contact, resulting in serious wear at the contact point, thereby causing problems such as increased resistance, increased operating temperature, and decreased power transmission power.

[0050] The second annular protrusion 111 restricts the annular contact spring 4 in the cavity 14 , preventing the annular contact spring 4 from axially moving in the cavity 14 at the position of the plug-in portion 11 and preventing the annular contact spring 4 from escaping from the cavity 14 .

[0051] In some embodiments, Figure 2-Figure 4 As shown, the annular contact spring 4 has multiple spring sheets arranged circumferentially at intervals, and the multiple spring sheets surround and form a contact cavity that wraps the mating terminal. The distance between the outer periphery of the annular contact spring 4 and the inner wall of the cavity 14 gradually decreases from the smallest diameter in the middle of the annular contact spring 4 to the two ends until they abut.

[0052] The annular contact spring 4 is a waist drum-shaped structure that is thick at both ends and thin in the middle, and the smallest diameter in the middle of the annular contact spring 4 abuts against the outer wall of the mating terminal, which can better clamp the mating terminal and ensure good electrical connection stability. The distance between the outer periphery of the annular contact spring 4 and the inner wall of the cavity 14 gradually decreases from the smallest diameter in the middle of the annular contact spring 4 to the two ends until abutment, so that the annular contact spring 4 is electrically connected to the terminal body 1, and the terminal body 1 is then electrically connected to the mating terminal through the annular contact spring 4, which not only ensures the electrical connection between the cylindrical terminal and the mating terminal, but also makes the mating terminal more stably clamped, and can also prevent the cylindrical terminal from being directly plugged into the mating terminal for electrical connection, resulting in wear of the cylindrical and mating terminals, thereby extending the service life of the terminals.

[0053] In some embodiments, Figure 4As shown, along the axial direction of the terminal body 1 , at least one end of the annular contact spring 4 has a set distance d from the second annular protrusion 111 .

[0054] The purpose of the distance d set here is to provide space for the annular contact spring 4 to extend axially during insertion, so that the annular contact spring 4 will not be damaged after the insertion.

[0055] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A barrel terminal for plugging with a mating terminal, characterized in that: It comprises a terminal body and an injection molding component arranged in the terminal body, the terminal body comprises a plug-in portion, a fixing portion and a wiring portion connected in sequence, and a through cavity is arranged in the terminal body; The injection molding component includes a sealing member and an anti-touch rod, wherein the anti-touch rod penetrates the sealing member, the sealing member is arranged in the fixing portion and is circumferentially connected to the inner wall of the cavity, the anti-touch rod has a set distance from the inner wall of the cavity, the fixing portion is provided with an installation groove at the middle and / or both ends of the sealing member, and the installation groove is provided with a first annular protrusion at a corresponding position of the inner wall of the cavity for fixing the injection molding component in the cavity.

2. A barrel terminal according to claim 1, characterized in that: The anti-touch rod, the sealing member and the terminal body are coaxially arranged.

3. A barrel terminal according to claim 1, characterized in that: One end of the anti-touch rod is exposed outside the plug-in portion, and the other end penetrates through the sealing member and enters into the fixing portion, but does not enter into the wiring portion.

4. A barrel terminal according to claim 1, characterized in that: The sealing element and the anti-touch rod are integrally injection-molded.

5. The barrel terminal according to claim 1, characterized in that: The installation groove is arranged on the fixing portion corresponding to the middle portion of the sealing member, and an annular groove is arranged on the outer periphery of the sealing member corresponding to the installation groove.

6. The barrel terminal according to claim 1, characterized in that: A plurality of the mounting grooves are arranged at intervals along the axial direction of the terminal body, and a sealing ring is sleeved in at least one of the mounting grooves.

7. A barrel terminal according to claim 6, characterized in that: The fixing portion is also provided with a clamping groove spaced apart from the mounting groove for clamping with a fixing position.

8. The barrel terminal according to claim 1, characterized in that: It also includes an annular contact spring arranged in the cavity at the position of the plug-in portion, wherein the annular contact spring is a waist drum-shaped structure with thick ends and a thin middle. Corresponding to the positions of the two ends of the annular contact spring, a second annular protrusion is arranged inside the cavity to confine the annular contact spring within the cavity.

9. A barrel terminal according to claim 8, characterized in that: The annular contact spring has a plurality of spring sheets arranged at intervals in the circumferential direction, and the plurality of spring sheets surround and form a contact cavity that wraps the mating terminal. The distance between the outer periphery of the annular contact spring and the inner wall of the cavity gradually decreases from the smallest diameter in the middle of the annular contact spring to both ends until they abut.

10. The barrel terminal according to claim 8, characterized in that: Along the axial direction of the terminal body, at least one end of the annular contact spring has a set distance from the second annular protrusion.

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