A waterproof type plastic shell current terminal

Abstract

This utility model provides a waterproof plastic-shell current terminal block, including several terminal heads that connect to electrical wires. These terminal heads are arranged in a row and inserted into terminal holes in a pre-formed plastic shell for fixation. The pre-formed plastic shell has a sealed injection-molded outer casing. Each terminal head has an upwardly protruding elastic piece, and the pre-formed plastic shell has a corresponding square groove. The elastic piece engages and is fixed in place with the square groove. Excellent waterproofing is achieved by completely sealing and encapsulating the pre-formed plastic shell, the connection point between the terminal head and the electrical wire, and the connector of the terminal head through the sealed injection-molded outer casing.

Description

Technical Field

[0001] This utility model belongs to the field of electrical component technology, and in particular relates to a waterproof plastic-cased current terminal block. Background Technology

[0002] Wire terminals are components used for electrical connections, primarily to reliably connect wires to other electrical equipment, conductors, or terminal blocks, ensuring smooth current transmission while guaranteeing the safety and stability of the connection. In some extreme operating conditions, current terminals require a certain degree of waterproofing to ensure equipment reliability.

[0003] Existing patent CN222015770U discloses a waterproof and moisture-proof wire and a waterproof connector terminal, belonging to the field of wire terminal technology. It includes a wire and a sealing assembly: one end of the wire is provided with an SR tail clip, the outer side of which is fitted with a first sealing ring, and one side of which is provided with a second sealing ring. One end of the SR tail clip is provided with a first connector, and one side of the first connector is connected to another wire via the second connector. A sealing assembly is fitted around the connection point of the two wires. The sealing assembly includes an upper sealing cover, a lower sealing cover, a groove, a retaining strip, a third sealing ring, a sealing gasket, and bolts. The bottom of the upper sealing cover is connected to the lower sealing cover via bolts, and the bottom of the upper sealing cover has a groove, which is connected to the third sealing ring via a retaining strip. Utility Model Content

[0004] Existing wire terminals often have poor sealing performance and lack sufficient waterproofing, failing to provide adequate protection for connected wires. Waterproof connectors often require complex installation methods and additional complex designs, resulting in inconvenience in production and application, as well as higher costs.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: a waterproof plastic shell current terminal block, including a plurality of terminal heads connected to wires, the plurality of terminal heads being inserted into the terminal holes of a pre-formed plastic shell in a row and fixed therein; the pre-formed plastic shell is provided with a sealed injection-molded outer casing; an elastic sheet protruding obliquely upward on the terminal head, and a square groove corresponding to the elastic sheet is provided on the pre-formed plastic shell, the elastic sheet engaging and fixing with the square groove.

[0006] As a further improvement of this utility model, one end of the terminal head is a wire connector with a wire clamp and a wire slot; the other end is a plug connector; the wire passes through the wire clamp and is fixedly connected to the terminal head through the wire slot.

[0007] As a further improvement of this utility model, the terminal head is provided with an elastic piece that protrudes obliquely upward, and the side of the elastic piece closest to the wire is the protruding side.

[0008] As a further improvement of this utility model, during installation, after the terminal head is connected to the wire, it is inserted into the terminal hole of the pre-formed plastic shell in one direction. The protruding side of the elastic sheet is pressed down first until the elastic sheet is in the square groove position and the protruding side of the elastic sheet springs up to achieve locking and fixing.

[0009] As a further improvement of this utility model, after the preformed plastic shell and the terminal head are installed, the outside of the preformed plastic shell is sealed by injection molding to form a sealed injection molded outer casing.

[0010] As a further improvement of this utility model, the sealed injection molded outer casing simultaneously seals and wraps the pre-formed plastic shell, the connection between the terminal head and the wire, and the connector of the terminal head.

[0011] As a further improvement of this utility model, the connector of the terminal head is provided with a plug core, which is detachable and fixed to the connector by a snap fastener.

[0012] As a further improvement of this utility model, the sealed injection molded outer shell is designed as a soft shell, and the elastic sheet can be pressed through the soft shell to loosen the engagement of the square slot and disassemble the terminal head.

[0013] The advantages of this utility model are that the overall structure is easy to assemble while ensuring sufficient waterproof performance, and there is no need to add external components such as waterproof sleeves, which saves costs and improves production efficiency. Attached Figure Description

[0014] Figure 1 This is a cross-sectional view of the present invention.

[0015] Figure 2 This is a structural diagram of the terminal head of this utility model.

[0016] In the diagram, 1 is the wire, 2 is the terminal head, 3 is the pre-formed plastic shell, 4 is the sealed injection molded outer casing, 5 is the elastic sheet, 6 is the wire clamp, 7 is the wire slot, and 8 is the connector core. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0018] Example 1: A waterproof plastic-cased current terminal block, such as Figure 1 As shown, it includes a terminal head 2 connected to an electrical wire, and several terminal heads 2 are inserted into the terminal holes of the preformed plastic shell 3 in a row for fixation; the preformed plastic shell 3 is provided with a sealed injection-molded outer casing 4; the terminal head 2 has an elastic piece 5 that protrudes obliquely upward, and the preformed plastic shell 3 is provided with a square groove corresponding to the elastic piece 5, and the elastic piece 5 is engaged and fixed with the square groove.

[0019] In this embodiment, as Figure 2As shown, one end of terminal head 2 is a connector, which has a wire clamp 6 and a wire slot 7; the other end is a plug; the wire passes through the wire clamp 6 and is fixedly connected to terminal head 2 through the wire slot 7.

[0020] In this embodiment, the terminal head 2 is provided with an elastic piece 5 that protrudes obliquely upward, and the side of the elastic piece 5 closest to the wire is the protruding side.

[0021] In this embodiment, during installation, after the terminal head 2 is connected to the wire, it is inserted into the terminal hole of the pre-formed plastic shell 3 in one direction. The protruding side of the elastic piece 5 is pressed down first until the elastic piece 5 is in the square slot position and the protruding side of the elastic piece 5 springs up to achieve locking and fixing.

[0022] In this embodiment, after the preformed plastic shell 3 and the terminal head 2 are installed, the outside of the preformed plastic shell 3 is sealed by injection molding to form a sealed injection molded outer casing 4.

[0023] In this embodiment, the sealed injection molded outer casing 4 simultaneously seals and wraps the pre-formed plastic shell 3, the connection between the terminal head 2 and the wire, and the plug of the terminal head 2.

[0024] In this embodiment, the connector of the terminal head 2 is provided with a connector core 8, which is detachable and fixed to the connector by a snap fastener.

[0025] In this embodiment, the sealed injection molded outer casing 4 is a soft shell design, and the elastic sheet 5 can be pressed through the soft shell to loosen the engagement of the square slot and disassemble the terminal head 2.

[0026] In this embodiment, the waterproof plastic-shell current terminal block includes two terminal heads 2, which are inserted in a row into the two terminal holes of the pre-formed plastic shell 3. During production and installation, the terminal heads 2 are first assembled, the connector core 8 is fixed to the connector's clip, and then the wire is threaded through the wire clamp 6 at the other end of the terminal head 2, and then fixed in the wire slot 7. At this point, the connection between the terminal head 2 and the wire is complete. The terminal head 2 is then inserted into the terminal hole of the pre-formed plastic shell 3 from the connector end. During insertion, the protruding side of the elastic piece 5 on the terminal head 2 is first pressed down. When the insertion continues until the elastic piece 5 is in the square slot position, the elastic piece 5 springs up and locks into the square slot. The engagement of the elastic piece 5 and the square slot not only secures the terminal head 2 but also facilitates positioning of the insertion depth of the terminal head 2 during installation. After the elastic piece 5 springs up, it can lock the square slot to prevent the terminal head 2 from retracting. When it is necessary to disassemble the terminal head 2, you only need to press the protruding side of the elastic piece 5 downward so that the height of the elastic piece 5 is lower than the square slot to pull the terminal head 2 out.

[0027] After the terminal head 2 and the pre-formed plastic shell 3 are assembled, they are placed into the mold for injection molding. At this time, the height of the terminal head 2 is used to position the mold. Therefore, the elastic piece 5 and the square groove not only facilitate the installation and connection of the terminal head 2 and the pre-formed plastic shell 3, but also achieve mold positioning during injection molding by fixing the height of the terminal head 2. During injection molding, the sealing injection molding outer shell 4 completely seals and wraps the pre-formed plastic shell 3, the connection between the terminal head 2 and the wire, and the connector of the terminal head 2. Especially at the connection between the wire and the terminal head 2, since the outer sheath of the wire needs to be stripped when connecting the wire connector, the internal core needs to be sealed and protected. Therefore, sealing injection molding is used to wrap it, which also achieves excellent waterproof effect. The sealing injection molding outer shell 4 is a soft shell design. Users can directly press the soft shell to press the protruding side of the elastic piece 5 into the square groove, which facilitates the disassembly and maintenance of the terminal head 2 after the overall installation is completed.

[0028] Example 2: A waterproof plastic shell current terminal block includes several terminal heads 2 that are connected to wires. The several terminal heads 2 are inserted into the terminal holes of a pre-formed plastic shell 3 in a row and fixed. The pre-formed plastic shell 3 is provided with a sealed injection-molded outer casing 4. The terminal head 2 has an elastic piece 5 that protrudes obliquely upward. The pre-formed plastic shell 3 is provided with a square groove corresponding to the elastic piece 5. The elastic piece 5 is engaged and fixed with the square groove.

[0029] In this embodiment, one end of the terminal head 2 is a connector, which is provided with a wire clamp 6 and a wire slot 7; the other end is a plug; the wire passes through the wire clamp 6 and is fixedly connected to the terminal head 2 through the wire slot 7.

[0030] In this embodiment, the terminal head 2 is provided with an elastic piece 5 that protrudes obliquely upward, and the side of the elastic piece 5 closest to the wire is the protruding side.

[0031] In this embodiment, during installation, after the terminal head 2 is connected to the wire, it is inserted into the terminal hole of the pre-formed plastic shell 3 in one direction. The protruding side of the elastic piece 5 is pressed down first until the elastic piece 5 is in the square slot position and the protruding side of the elastic piece 5 springs up to achieve locking and fixing.

[0032] In this embodiment, after the preformed plastic shell 3 and the terminal head 2 are installed, the outside of the preformed plastic shell 3 is sealed by injection molding to form a sealed injection molded outer casing 4.

[0033] In this embodiment, the sealed injection molded outer casing 4 simultaneously seals and wraps the pre-formed plastic shell 3, the connection between the terminal head 2 and the wire, and the plug of the terminal head 2.

[0034] In this embodiment, the connector of the terminal head 2 is provided with a connector core 8, which is detachable and fixed to the connector by a snap fastener.

[0035] In this embodiment, the sealed injection molded outer casing 4 is a soft shell design, and the elastic sheet 5 can be pressed through the soft shell to loosen the engagement of the square slot and disassemble the terminal head 2.

[0036] In this embodiment, the waterproof plastic-shell current terminal block includes two terminal heads 2, which are inserted in a row into the two terminal holes of the pre-formed plastic shell 3. During production and installation, the terminal heads 2 are first assembled, the connector core 8 is fixed to the connector's clip, and then the wire is threaded through the wire clamp 6 at the other end of the terminal head 2, and then fixed in the wire slot 7. At this point, the connection between the terminal head 2 and the wire is complete. The terminal head 2 is then inserted into the terminal hole of the pre-formed plastic shell 3 from the connector end. During insertion, the protruding side of the elastic piece 5 on the terminal head 2 is first pressed down. When the insertion continues until the elastic piece 5 is in the square slot position, the elastic piece 5 springs up and locks into the square slot. The engagement of the elastic piece 5 and the square slot not only secures the terminal head 2 but also facilitates positioning of the insertion depth of the terminal head 2 during installation. After the elastic piece 5 springs up, it can lock the square slot to prevent the terminal head 2 from retracting. When it is necessary to disassemble the terminal head 2, you only need to press the protruding side of the elastic piece 5 downward so that the height of the elastic piece 5 is lower than the square slot to pull the terminal head 2 out.

[0037] After the terminal head 2 and the pre-formed plastic shell 3 are assembled, they are placed into the mold for injection molding. At this time, the height of the terminal head 2 is used to position the mold. Therefore, the elastic piece 5 and the square groove not only facilitate the installation and connection of the terminal head 2 and the pre-formed plastic shell 3, but also achieve mold positioning during injection molding by fixing the height of the terminal head 2. During injection molding, the sealing injection molding outer shell 4 completely seals and wraps the pre-formed plastic shell 3, the connection between the terminal head 2 and the wire, and the connector of the terminal head 2. Especially at the connection between the wire and the terminal head 2, since the outer sheath of the wire needs to be stripped when connecting the wire connector, the internal core needs to be sealed and protected. Therefore, sealing injection molding is used to wrap it, which also achieves excellent waterproof effect. The sealing injection molding outer shell 4 is a soft shell design. Users can directly press the soft shell to press the protruding side of the elastic piece 5 into the square groove, which facilitates the disassembly and maintenance of the terminal head 2 after the overall installation is completed.

[0038] In existing technologies, to protect the interface between wires and terminals and to ensure overall waterproofing, it is often necessary to install structures such as tail clips and waterproof plugs. However, under extreme operating conditions, the waterproofing achieved through these additional installations is often insufficiently reliable and cannot guarantee consistently excellent waterproofing performance. This embodiment utilizes a sealed injection-molded outer casing 4, which not only facilitates production and installation but also saves additional costs while ensuring better waterproofing performance.

[0039] Example 3: A waterproof plastic shell current terminal block includes several terminal heads 2 that are connected to wires. The several terminal heads 2 are inserted into the terminal holes of a pre-formed plastic shell 3 in a row and fixed. The pre-formed plastic shell 3 is provided with a sealed injection-molded outer casing 4. The terminal head 2 has an elastic piece 5 that protrudes obliquely upward. The pre-formed plastic shell 3 is provided with a square groove corresponding to the elastic piece 5. The elastic piece 5 is engaged and fixed with the square groove.

[0040] In this embodiment, one end of the terminal head 2 is a connector, which is provided with a wire clamp 6 and a wire slot 7; the other end is a plug; the wire passes through the wire clamp 6 and is fixedly connected to the terminal head 2 through the wire slot 7.

[0041] In this embodiment, the terminal head 2 is provided with an elastic piece 5 that protrudes obliquely upward, and the side of the elastic piece 5 closest to the wire is the protruding side.

[0042] In this embodiment, during installation, after the terminal head 2 is connected to the wire, it is inserted into the terminal hole of the pre-formed plastic shell 3 in one direction. The protruding side of the elastic piece 5 is pressed down first until the elastic piece 5 is in the square slot position and the protruding side of the elastic piece 5 springs up to achieve locking and fixing.

[0043] In this embodiment, after the preformed plastic shell 3 and the terminal head 2 are installed, the outside of the preformed plastic shell 3 is sealed by injection molding to form a sealed injection molded outer casing 4.

[0044] In this embodiment, the sealed injection molded outer casing 4 simultaneously seals and wraps the pre-formed plastic shell 3, the connection between the terminal head 2 and the wire, and the plug of the terminal head 2.

[0045] In this embodiment, the connector of the terminal head 2 is provided with a connector core 8, which is detachable and fixed to the connector by a snap fastener.

[0046] In this embodiment, the sealed injection molded outer casing 4 is a soft shell design, and the elastic sheet 5 can be pressed through the soft shell to loosen the engagement of the square slot and disassemble the terminal head 2.

[0047] In this embodiment, the waterproof plastic-shell current terminal block used in specific applications includes four terminal heads 2, which are arranged in a row and inserted into two terminal holes in the pre-formed plastic shell 3. During production and installation, the terminal heads 2 are first assembled, the connector core 8 is fixed to the connector's clip, and then the wire is threaded through the wire clamp 6 at the other end of the terminal head 2, and then fixed in the wire slot 7. At this point, the connection between the terminal head 2 and the wire is complete. The terminal head 2 is then inserted into the terminal hole of the pre-formed plastic shell 3 from the connector end. During insertion, the protruding side of the elastic piece 5 on the terminal head 2 is first pressed down. When the insertion continues until the elastic piece 5 is in the square slot position, the elastic piece 5 springs up and locks into the square slot. The engagement of the elastic piece 5 and the square slot not only secures the terminal head 2 but also facilitates positioning of the insertion depth of the terminal head 2 during installation. After the elastic piece 5 springs up, it can lock the square slot to prevent the terminal head 2 from retracting. When it is necessary to disassemble the terminal head 2, you only need to press the protruding side of the elastic piece 5 downward so that the height of the elastic piece 5 is lower than the square slot to pull the terminal head 2 out.

[0048] After the terminal head 2 and the pre-formed plastic shell 3 are assembled, they are placed into the mold for injection molding. At this time, the height of the terminal head 2 is used to position the mold. Therefore, the elastic piece 5 and the square groove not only facilitate the installation and connection of the terminal head 2 and the pre-formed plastic shell 3, but also achieve mold positioning during injection molding by fixing the height of the terminal head 2. During injection molding, the sealing injection molding outer shell 4 completely seals and wraps the pre-formed plastic shell 3, the connection between the terminal head 2 and the wire, and the connector of the terminal head 2. Especially at the connection between the wire and the terminal head 2, since the outer sheath of the wire needs to be stripped when connecting the wire connector, the internal core needs to be sealed and protected. Therefore, sealing injection molding is used to wrap it, which also achieves excellent waterproof effect. The sealing injection molding outer shell 4 is a soft shell design. Users can directly press the soft shell to press the protruding side of the elastic piece 5 into the square groove, which facilitates the disassembly and maintenance of the terminal head 2 after the overall installation is completed.

[0049] In existing technologies, to protect the interface between wires and terminals and to ensure overall waterproofing, it is often necessary to install structures such as tail clips and waterproof plugs. However, under extreme operating conditions, the waterproofing achieved through these additional installations is often insufficiently reliable and cannot guarantee consistently excellent waterproofing performance. This embodiment utilizes a sealed injection-molded outer casing 4, which not only facilitates production and installation but also saves additional costs while ensuring better waterproofing performance.

[0050] This embodiment ensures that the overall current terminal block achieves IP67-level protection, completely preventing dust ingress. Even when exposed to high dust levels during normal use, it will not be affected by dust. Furthermore, it can operate normally under certain water pressure and time conditions, guaranteeing operational requirements under extreme circumstances.

[0051] The above specific embodiments are merely preferred embodiments of this utility model, and are not intended to limit the specific implementation structure and scope of this utility model. In fact, some equivalent changes can be made according to the shape, structure, and design purpose of this utility model. Therefore, all equivalent changes made according to the shape, structure, and design purpose of this utility model should be included within the protection scope of this utility model, that is, these equivalent changes should all be protected by this utility model.

Claims

1. A waterproof molded case current terminal characterized by comprising: It includes several terminal heads that connect to wires, and the several terminal heads are inserted into the terminal holes of the pre-formed plastic shell in a row for fixation; the pre-formed plastic shell is provided with a sealed injection-molded outer casing; there is an elastic piece that protrudes obliquely upward on the terminal head, and the pre-formed plastic shell is provided with a square groove corresponding to the elastic piece, and the elastic piece is engaged and fixed with the square groove.

2. The waterproof plastic-cased current terminal block according to claim 1, characterized in that, One end of the terminal head is a wire connector with a wire clamp and a wire slot; the other end is a plug connector; the wire passes through the wire clamp and is fixedly connected to the terminal head through the wire slot.

3. The waterproof plastic-cased current terminal block according to claim 1 or 2, characterized in that, The terminal head is provided with an upwardly protruding elastic piece, with the side of the elastic piece closest to the wire being the protruding side.

4. The waterproof plastic-cased current terminal block according to claim 3, characterized in that, During installation, after the terminal head is connected to the wire, it is inserted into the terminal hole of the pre-formed plastic shell in one direction. The protruding side of the elastic sheet is pressed down first until the elastic sheet is in the square slot position. The protruding side of the elastic sheet springs up to achieve locking and fixation.

5. The waterproof plastic-cased current terminal block according to claim 1, characterized in that, After the preformed plastic shell and terminal head are installed, the outside of the preformed plastic shell is sealed by injection molding to form a sealed injection molded outer shell.

6. The waterproof plastic-cased current terminal block according to claim 1 or 5, characterized in that, The sealed injection-molded outer casing simultaneously seals and wraps the pre-formed plastic shell, the connection between the terminal head and the wire, and the connector of the terminal head.

7. The waterproof plastic-cased current terminal block according to claim 1 or 2, characterized in that, The connector of the terminal head is provided with a connector core, which is detachable and fixed to the connector by a snap fastener.

8. The waterproof plastic-cased current terminal block according to claim 6, characterized in that, The sealed injection molded outer shell is designed as a soft shell. The elastic sheet can be pressed through the soft shell to loosen the engagement of the square slot and allow for the removal of the terminal head.

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