Wiring terminal

Abstract

The utility model relates to a wiring terminal, which comprises a terminal main body and a flame-retardant sheath, the terminal main body comprises a connector and a connector lug, the connector lug is provided with a plug wire hole, the wiring terminal also comprises an inner connecting sleeve, the inner connecting sleeve is a cylinder which is sleeved outside the connector lug and is in interference fit with the connector lug, and the flame-retardant sheath is arranged in the inner connecting sleeve. The flame-retardant sheath is sleeved outside the inner connecting sleeve and is in interference fit with the inner connecting sleeve; a flaring sleeve is arranged on the side, back to the terminal body, of the flame-retardant sheath, and a flaring part matched with the inner wall of the flaring sleeve is arranged on the side, back to the terminal body, of the inner connecting sleeve. The wiring terminal provided by the utility model is more stable in connection.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical accessories, in particular to a connection terminal. Background Art

[0002] Terminal blocks are accessories used to achieve electrical connections and are classified as connectors in the industrial sector. With the increasing degree of industrial automation and increasingly stringent and precise industrial control requirements, the use of terminal blocks has gradually increased. With the development of the electronics industry, the scope of use of terminal blocks has expanded, and their variety has also increased. In addition to PCB terminals, the most widely used types include hardware terminals, nut terminals, spring terminals, and more.

[0003] Terminal blocks usually have a PVC flame-retardant sheath on the terminal head to provide insulation and fire protection. However, the existing flame-retardant sheath is usually directly placed on the terminal head. After the wire is inserted, the flame-retardant sheath is clamped with wire clamps until it is deformed. However, since the flame-retardant sheath is made of PVC and is not hard enough, the movement of the wire in the terminal head may cause the flame-retardant sheath to be stretched by the joint, resulting in an unstable connection. Utility Model Content

[0004] In summary, in order to overcome the deficiencies of the prior art, the present invention provides a wiring terminal with a more stable connection.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a terminal, comprising a terminal body and a flame-retardant sheath, the terminal body comprising a connecting head and a wiring head, the wiring head being provided with a wire insertion hole, and further comprising an inner connecting sleeve, the inner connecting sleeve being a tube-shaped sleeve which is sleeved on the outside of the wiring head and has an interference fit therewith, and the flame-retardant sheath is sleeved on the outside of the inner connecting sleeve and has an interference fit therewith.

[0006] With this arrangement, when in use, the inner connecting sleeve is first put on the outside of the terminal head and forced into place. Since the terminal head is usually a cylinder with an opening in the side wall, the opening can be squeezed into place during insertion, and since the inner connecting sleeve is cylindrical, the side wall has no opening and will not be stretched open. In this way, an interference fit effect can be achieved after insertion. Then the flame retardant sleeve is put on the outside of the inner connecting sleeve, and the installation of the terminal is completed. When connecting the wires, insert the wires into the wire insertion hole, and then use wire clamps to flatten the flame retardant sleeve. At the same time, the terminal head and the inner connecting sleeve located inside will also be flattened. The inner connecting sleeve can be made of hard materials such as metal copper, so that secondary deformation is not easy to occur. When the wire in the terminal head moves to stretch the terminal head, it will first contact the inner connecting sleeve. Only when the force is large enough to push the hard inner connecting sleeve to secondary deformation will it affect the flame retardant sleeve, and the connection will be more stable.

[0007] Furthermore, a flared sleeve is provided on a side of the flame retardant sheath facing away from the terminal body, and a flared portion adapted to an inner wall of the flared sleeve is provided on a side of the inner connecting sleeve facing away from the terminal body.

[0008] With this arrangement, the flared sleeve of the flame retardant sheath can be used to allow the outer shell of the wire to be inserted, and the inner connecting sleeve is provided with a flared portion to form a stepped shape, and the fitting flared sleeve allows the flame retardant sheath to only slide in one direction, which is more stable.

[0009] Furthermore, a retracted portion is provided between the flared portion and the main body of the inner connecting sleeve, and the outer diameter of the retracted portion is smaller than the outer diameter of the main body of the inner connecting sleeve.

[0010] With this arrangement, the retracted portion can serve as a limit for the terminal head. When the terminal head is inserted into the retracted portion, it will stop, which is more stable. After the wire clamp is clamped, the retracted portion will clamp the wire more tightly, which is more stable.

[0011] Furthermore, the side of the retracted portion facing away from the terminal body is tapered.

[0012] With this arrangement, the cone can play a guiding role when inserting the flame retardant sheath, making insertion easier, and the wire can also be inserted along the cone surface.

[0013] Furthermore, the inner diameter of the retracted portion is not greater than the diameter of the wire insertion hole.

[0014] With this arrangement, when the wire is inserted along the tapered surface, it will be directly guided into the wire insertion hole and will not hit the end face of the terminal head, making installation more convenient.

[0015] Furthermore, the distance between the end surface of the inner connecting sleeve facing the terminal body and the retracted portion is not less than the length of the wiring head.

[0016] With this arrangement, the terminal head will be completely wrapped by the inner connecting sleeve and will not be exposed to the outside.

[0017] Furthermore, a bending plate bent toward the axial direction of the inner connecting sleeve is provided on an end surface of the inner connecting sleeve facing the terminal body.

[0018] With this arrangement, a plate will protrude from one side of the inner connecting sleeve. After the terminal head is fully inserted, the plate can be bent to buckle the terminal head and block its exit direction. In this way, the inner connecting sleeve cannot be pulled out anymore, making it more stable.

[0019] Furthermore, two oppositely arranged opening grooves are provided on an end surface of the inner connecting sleeve facing the terminal body.

[0020] With this arrangement, the end of the inner connecting sleeve can be more easily stretched after the opening is provided, so that the terminal head can be inserted more easily. Moreover, the opening only occupies a small part of the inner connecting sleeve and will not affect the overall stability.

[0021] Furthermore, an end of the inner connecting sleeve facing away from the terminal body is provided with a seesaw that is tilted away from the axial direction of the inner connecting sleeve.

[0022] With such a configuration, the tilted seesaw will not interfere with the insertion process of the flame retardant sheath when it is inserted, but will press against the inner wall when it is withdrawn, preventing it from sliding out and increasing the overall stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of an embodiment of the present utility model.

[0024] Figure 2 This is an exploded view of an embodiment of the present utility model.

[0025] Figure 3 It is a cross-sectional view of an embodiment of the present utility model.

[0026] The meaning of the numbers in the figure are: 1. Terminal body, 101. Connector, 102. Wiring head, 1021. Wire insertion hole, 2. Flame retardant sheath, 201. Expanding sleeve, 3. Inner connecting sleeve, 301. Expanding part, 302. Retracted part, 303. Bending plate, 304. Opening groove, 305. Rocker. DETAILED DESCRIPTION

[0027] This specific embodiment is merely an explanation of this embodiment and is not a limitation of this embodiment. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed, but as long as they are within the scope of the claims of this embodiment, they are protected by patent law.

[0028] Referring to the accompanying drawings, the present invention provides the following technical solutions: a terminal, comprising a terminal body 1 and a flame retardant sheath 2, the terminal body 1 comprising a connecting head 101 and a wiring head 102, the wiring head 102 being provided with a wire insertion hole 1021, and further comprising an inner connecting sleeve 3, the inner connecting sleeve 3 being a tubular shape which is sleeved on the outside of the wiring head 102 and is interference fit therewith, the flame retardant sheath 2 being sleeved on the outside of the inner connecting sleeve 3 and is interference fit therewith.

[0029] When the wire in the terminal block 102 moves to stretch the terminal block 102, it will first contact the inner connecting sleeve 3. When the force is large enough to push the hard inner connecting sleeve 3 to the secondary deformation, it will affect the flame retardant sleeve 2, and the connection will be more stable.

[0030] In this embodiment, the flame retardant sheath 2 is preferably provided with a flared sleeve 201 on the side facing away from the terminal body 1 , and the inner connecting sleeve 3 is preferably provided with a flared portion 301 adapted to the inner wall of the flared sleeve 201 on the side facing away from the terminal body 1 .

[0031] With this arrangement, the flared sleeve 201 of the flame retardant sheath 2 can be used to allow the outer shell of the wire to be inserted, and the inner connecting sleeve 3 is provided with the flared portion 301 to form a stepped shape, and the flared sleeve 201 is fitted so that the flame retardant sheath 2 can only slide in one direction, which is more stable.

[0032] Preferably, in this embodiment, a retracted portion 302 is provided between the flared portion 301 and the main body of the inner connecting sleeve 3 , and the outer diameter of the retracted portion 302 is smaller than the outer diameter of the main body of the inner connecting sleeve 3 .

[0033] With this arrangement, the retracted portion 302 can serve as a limit for the terminal head 102. When the terminal head 102 is inserted into the retracted portion 302, it will stop, which is more stable. After being clamped by the wire clamp, the retracted portion 302 will clamp the wire more tightly, which is more stable.

[0034] Preferably, in this embodiment, the side of the retracted portion 302 facing away from the terminal body 1 is tapered.

[0035] With such a configuration, the cone can play a guiding role when inserting the flame retardant sheath 2, making insertion easier, and the wire can also be inserted along the surface of the cone.

[0036] In this embodiment, preferably, the inner diameter of the retracted portion 302 is not greater than the diameter of the wire insertion hole 1021 .

[0037] With this arrangement, when the wire is inserted along the tapered surface, it will be directly guided into the wire insertion hole 1021 and will not hit the end surface of the terminal head 102, making installation more convenient.

[0038] In this embodiment, preferably, the distance between the end surface of the inner connecting sleeve 3 facing the terminal body 1 and the retracted portion 302 is not less than the length of the wiring head 102 .

[0039] With this arrangement, the connection head 102 will be completely wrapped by the inner connection sleeve 3 and will not be exposed to the outside.

[0040] Preferably, in this embodiment, a bending plate 303 bent toward the axial direction of the inner connecting sleeve 3 is provided on an end surface of the inner connecting sleeve 3 facing the terminal body 1 .

[0041] With this arrangement, a plate will protrude from one side of the inner connecting sleeve 3. After the terminal head 102 is fully inserted, the plate can be bent to buckle the terminal head 102 and block its withdrawal direction. In this way, the inner connecting sleeve 3 cannot be pulled out anymore, making it more stable.

[0042] Preferably, in this embodiment, two oppositely arranged opening grooves 304 are provided on an end surface of the inner connecting sleeve 3 facing the terminal body 1 .

[0043] With this arrangement, the end of the inner connecting sleeve 3 can be more easily stretched after the opening is provided, so that the terminal 102 is more easily inserted. Moreover, the opening only occupies a small part of the inner connecting sleeve 3 and will not affect the overall stabilization effect.

[0044] In this embodiment, preferably, the end of the inner connecting sleeve 3 facing away from the terminal body 1 is provided with a seesaw 305 tilted away from the axial direction of the inner connecting sleeve 3 . The above setting is not limiting, and multiple seesaws 305 can be provided.

[0045] With such arrangement, the tilted seesaw 305 will not interfere with the insertion process of the flame retardant sheath 2 when it is inserted, but will press against the inner wall thereof when it is withdrawn, thereby preventing it from sliding out and increasing the overall stability.

[0046] Although the present invention has been described in detail with reference to the aforementioned embodiments, the scope of protection of the present invention is not limited thereto. Any equivalent replacement or change made by any technician familiar with the technical field within the technical scope disclosed by the present invention according to the technical solution and the utility model concept of the present invention should be covered by the scope of protection of the present invention.

Claims

1. A terminal block comprising a terminal body and a flame-retardant sheath, wherein the terminal body comprises a connecting head and a wiring head, wherein the wiring head is provided with a wire insertion hole, characterized in that: It also includes an inner connecting sleeve, which is in the shape of a tube and is sleeved outside the terminal head to have an interference fit therewith, and the flame retardant sheath is sleeved outside the inner connecting sleeve to have an interference fit therewith.

2. The terminal block according to claim 1, wherein: A flared sleeve is provided on the side of the flame retardant sheath facing away from the terminal body, and a flared portion adapted to the inner wall of the flared sleeve is provided on the side of the inner connecting sleeve facing away from the terminal body.

3. The terminal block according to claim 2, wherein: An indented portion is provided between the flared portion and the main body of the inner connecting sleeve, and an outer diameter of the indented portion is smaller than an outer diameter of the main body of the inner connecting sleeve.

4. The terminal block according to claim 3, wherein: The side of the retracted portion facing away from the terminal body is tapered.

5. The terminal block according to claim 4, characterized in that: The inner diameter of the retracted portion is no greater than the diameter of the wire insertion hole.

6. The terminal block according to claim 3, wherein: The distance between the end surface of the inner connecting sleeve facing the terminal body and the retracted portion is not less than the length of the wiring head.

7. The terminal block according to claim 6, characterized in that: A bending plate bent toward the axial direction of the inner connecting sleeve is provided on an end surface of the inner connecting sleeve facing the terminal body.

8. The terminal block according to claim 1, wherein: The end surface of the inner connecting sleeve facing the terminal body is provided with two oppositely arranged opening grooves.

9. The terminal block according to claim 1, wherein: An end of the inner connecting sleeve facing away from the terminal body is provided with a seesaw which is tilted away from the axial direction of the inner connecting sleeve.

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