Connector capable of preventing terminal from falling off or rotating

Abstract

The utility model discloses a connector capable of preventing terminals from falling off or rotating. The connector comprises a plastic cement main body and a plurality of terminals which are integrally installed on the plastic cement main body. The plastic main body is provided with a plurality of mounting holes for mounting the plurality of terminals, and limiting surfaces are arranged in the mounting holes; the outer side of each terminal is provided with a limiting ring and a plurality of anti-rotation salient points, the limiting rings and the anti-rotation salient points are accommodated in the mounting holes, the limiting surfaces are used for abutting against the limiting rings to prevent the terminals from being separated from the plastic main body, and the anti-rotation salient points are used for preventing the terminals from rotating relative to the plastic main body and being separated from the plastic main body. According to the connector capable of preventing the terminal from falling off or rotating, the terminal can be effectively prevented from falling off from the plastic main body by utilizing the mutual abutting effect of the limiting ring and the limiting surface; the anti-rotation salient points are utilized to form resistance clamping points, so that the terminal rotation caused by insufficient holding force between the terminal and the plastic main body after the plastic main body expands with heat and contracts with cold can be effectively prevented, and the connector is simple in structure, few in parts and low in production cost.

Description

Technical Field

[0001] The utility model relates to the technical field of connectors, and in particular discloses a connector which can prevent terminals from falling off or rotating. Background Art

[0002] Traditional wire-welding connectors basically have only the pins of the terminals installed on the plastic body. During the process of plugging and unplugging the connector, the terminals are easily broken at the connection between the pins and the welding wires, and are easily detached from the plastic body. During the welding process, the plastic body is affected by the heat of welding, the aperture of the installation terminal becomes larger, and the holding force between the terminal and the plastic body is insufficient, which may also cause the terminal to fall off the plastic body, or the terminal to rotate relative to the plastic body, affecting its use.

[0003] In order to solve the above problems and improve the reliability of the connector, the existing solder wire connectors choose to use a multi-part method (snaps, rear plastic plugs) to prevent the terminals from falling off, or use an anti-fool structure to prevent the terminals from rotating, which makes the production process more complicated, increases the production cost, and is not conducive to economical production. Utility Model Content

[0004] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the utility model is to provide a connector that prevents terminals from falling off or rotating, which not only solves the problem of terminals falling off or rotating from the plastic body, but also simplifies the production process and saves production costs.

[0005] To achieve the above-mentioned purpose, the utility model provides a connector for preventing terminals from falling off or rotating, comprising a plastic body and a plurality of terminals integrated and installed in the plastic body; the plastic body is provided with a plurality of mounting holes for installing the plurality of terminals, and a limiting surface is provided in the mounting holes; a limiting ring and a plurality of anti-rotation protrusions are provided on the outer sides of the plurality of terminals, the limiting ring and the plurality of anti-rotation protrusions are both accommodated in the mounting holes, the limiting surface is used to resist the limiting ring to prevent the terminal from detaching from the plastic body, and the plurality of anti-rotation protrusions are used to prevent the terminal from rotating relative to the plastic body and detaching from the plastic body.

[0006] Specifically, the terminal includes a pin portion and a welding wire portion, the pin portion is connected to the welding wire portion via a limiting ring, the outer diameter of the pin portion is smaller than the outer diameter of the welding wire portion, and the outer diameter of the welding wire portion is smaller than the outer diameter of the limiting portion.

[0007] Specifically, the plastic body is further provided with a receiving cavity, which is respectively connected to the plurality of mounting holes, and the receiving cavity is used for receiving and protecting the pin parts of the plurality of terminals.

[0008] Specifically, the mounting hole is divided into a front end hole and a rear end hole via a limiting surface. The front end hole is connected to the accommodating cavity. The inner diameter of the front end hole is larger than the inner diameter of the rear end hole. The limiting ring is accommodated in the front end hole, and the anti-rotation protrusion is accommodated in the rear end hole.

[0009] Specifically, a plurality of anti-rotation protrusions are arranged in a ring shape on the outside of the welding wire portion and located at one end close to the limiting ring, and the height of the anti-rotation protrusions gradually increases from the welding wire portion toward the limiting ring.

[0010] Beneficial effects of the utility model: The connector for preventing the terminal from falling off or rotating described in the utility model comprises a plastic body and a plurality of terminals integrated and installed in the plastic body; the plastic body is provided with a plurality of mounting holes for installing the plurality of terminals, and a limited surface is provided in the mounting holes; the outer sides of the plurality of terminals are provided with a limited ring and a plurality of anti-rotation protrusions, the limited ring and the plurality of anti-rotation protrusions are both accommodated in the mounting holes, the limited surface is used to resist the limited ring to prevent the terminal from separating from the plastic body, and the plurality of anti-rotation protrusions are used to prevent the terminal from rotating relative to the plastic body and separating from the plastic body. The connector for preventing the terminal from falling off or rotating can effectively prevent the terminal from falling off from the plastic body by using the mutual resistance between the limited ring and the limited surface; the resistance point is formed by using the anti-rotation protrusion, which can effectively prevent the terminal from rotating due to insufficient holding force between the terminal and the plastic body after the plastic body expands and contracts, and the connector has a simple structure, few parts, and low production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0012] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0013] Figure 3 It is a three-dimensional structural schematic diagram of the terminal of the utility model;

[0014] Figure 4 For the utility model Figure 2 Schematic diagram of the local structure of A.

[0015] Reference numerals include:

[0016] 1—Plastic body 2—Terminal 11—Mounting hole

[0017] 12—limiting surface 13—rear end hole 14—accommodating cavity

[0018] 15—front end hole 21—limiting ring 22—anti-rotation convex point

[0019] 23 - pin portion 24 - soldering wire portion. DETAILED DESCRIPTION

[0020] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments and drawings. The contents mentioned in the implementation modes are not intended to limit the present invention.

[0021] See also Figures 1 to 4As shown, a connector for preventing a terminal from falling off or rotating of the utility model comprises a plastic body 1 and a plurality of terminals 2 integrated and mounted on the plastic body 1; the plastic body 1 is provided with a plurality of mounting holes 11 for mounting the plurality of terminals 2, and a limited surface 12 is arranged in the mounting hole 11; a limited ring 21 and a plurality of anti-rotation protrusions 22 are arranged on the outer sides of the plurality of terminals 2, the limited ring 21 and the plurality of anti-rotation protrusions 22 are accommodated in the mounting hole 11, the limited surface 12 is used to abut against the limited ring 21 to prevent the terminal 2 from detaching from the plastic body 1, and the plurality of anti-rotation protrusions 22 are used to prevent the terminal 2 from rotating relative to the plastic body 1 and detaching from the plastic body 1. In this embodiment, the number of the terminals 2 is six, and the number of the mounting holes 11 is also six, and the six mounting holes 11 are arranged in parallel in the plastic body 1 in a "one" shape. When the connector is in use, during the process of pulling out the wire, the limited surface 12 will abut against the end face of the limited ring 21 to prevent the terminal 2 from detaching from the mounting hole 11. The anti-rotation protrusion 22 is in contact with the inner wall of the mounting hole 11. When the plastic body 1 is subjected to the heat of welding, it will expand and contract, and the size of the mounting hole 11 will change accordingly. The anti-rotation protrusion 22 can ensure the holding force between the terminal 2 and the mounting hole 11, effectively preventing the terminal 2 from rotating or falling off.

[0022] The connector for preventing the terminal from falling off or rotating utilizes the mutual resistance between the limit ring 21 and the limit surface 12 to effectively prevent the terminal 2 from falling off from the plastic body 1; utilizes the anti-rotation protrusion 22 to form a resistance point to effectively prevent the terminal 2 from rotating due to insufficient holding force between the terminal 2 and the plastic body 1 after the plastic body 1 expands and contracts; and the connector has a simple structure, few parts, and low production cost.

[0023] See also Figures 2 to 3 As shown, the terminal 2 includes a pin portion 23 and a welding wire portion 24. The pin portion 23 is connected to the welding wire portion 24 via a limiting ring 21. The outer diameter of the pin portion 23 is smaller than the outer diameter of the welding wire portion 24. The outer diameter of the welding wire portion 24 is smaller than the outer diameter of the limiting portion. The limiting surface 12 abuts against the end surface of the limiting ring 21 close to the welding wire portion 24. A blind hole for accommodating a wire is provided at one end of the welding wire portion 24 away from the pin portion 23, and in order to facilitate the insertion of the wire into the blind hole, the free end of the welding wire portion 24 is beveled.

[0024] See also Figure 3 As shown, the plastic body 1 is further provided with a receiving cavity 14, which is respectively connected to the plurality of mounting holes 11, and is used to receive and protect the pin portions 23 of the plurality of terminals 2 to prevent the pin portions 23 from being broken or twisted. A marking bump is provided on the outside of the receiving cavity 14 to identify the insertion direction when in use.

[0025] See also Figure 4As shown, the mounting hole 11 is divided into a front hole 15 and a rear hole 13 through a limiting surface 12, the front hole 15 is connected to the accommodating cavity 14, the inner diameter of the front hole 15 is larger than the inner diameter of the rear hole 13, the limiting ring 21 is accommodated in the front hole 15, and the anti-rotation protrusion 22 is accommodated in the rear hole 13. When the terminal 2 is installed on the plastic body 1, the welding wire part 24 first enters the accommodating cavity 14, then enters the front hole 15 and passes through the rear hole 13, so that the limiting ring 21 enters the front hole 15 and the end face abuts the limiting surface 12, and the pin part 23 is completely surrounded by the outer wall of the accommodating cavity 14.

[0026] See also Figure 3 As shown, a plurality of anti-rotation protrusions 22 are arranged in a ring shape on the outside of the welding wire portion 24 and are located at one end close to the limiting ring 21. The height of the anti-rotation protrusions 22 gradually increases from the welding wire portion 24 toward the limiting ring 21, which not only plays an anti-rotation and anti-detachment role, but also facilitates the installation of the terminal 2.

[0027] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. A connector for preventing a terminal from falling off or rotating, comprising a plastic body (1) and a plurality of terminals (2) integrally mounted on the plastic body (1); characterized in that: The plastic body (1) is provided with a plurality of mounting holes (11) for mounting a plurality of terminals (2), and a limiting surface (12) is provided in the mounting hole (11); a limiting ring (21) and a plurality of anti-rotation protrusions (22) are provided on the outer sides of the plurality of terminals (2), the limiting ring (21) and the plurality of anti-rotation protrusions (22) are both accommodated in the mounting hole (11), the limiting surface (12) is used to abut against the limiting ring (21) to prevent the terminal (2) from detaching from the plastic body (1), and the plurality of anti-rotation protrusions (22) are used to prevent the terminal (2) from rotating relative to the plastic body (1) and detaching from the plastic body (1).

2. The connector for preventing the terminal from falling off or rotating according to claim 1, characterized in that: The terminal (2) comprises a pin portion (23) and a welding wire portion (24); the pin portion (23) is connected to the welding wire portion (24) via a limiting ring (21); the outer diameter of the pin portion (23) is smaller than the outer diameter of the welding wire portion (24); and the outer diameter of the welding wire portion (24) is smaller than the outer diameter of the limiting portion.

3. The connector for preventing the terminal from falling off or rotating according to claim 2, characterized in that: The plastic body (1) is also provided with a receiving cavity (14), the receiving cavity (14) being respectively connected to the plurality of mounting holes (11), and the receiving cavity (14) being used to receive the pin portions (23) for protecting the plurality of terminals (2).

4. The connector for preventing the terminal from falling off or rotating according to claim 3, characterized in that: The mounting hole (11) is divided into a front end hole (15) and a rear end hole (13) via a limiting surface (12); the front end hole (15) is connected to the accommodating cavity (14); the inner diameter of the front end hole (15) is larger than the inner diameter of the rear end hole (13); the limiting ring (21) is accommodated in the front end hole (15); and the anti-rotation protrusion (22) is accommodated in the rear end hole (13).

5. The connector for preventing the terminal from falling off or rotating according to claim 2, characterized in that: A plurality of anti-rotation protrusions (22) are arranged in a ring shape outside the welding line portion (24) and located at one end close to the limiting ring (21), and the height of the anti-rotation protrusions (22) gradually increases from the welding line portion (24) toward the limiting ring (21).

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