Spring terminal block

Abstract

The utility model discloses a spring terminal block, comprising a plastic body, a spring sheet, a conductive plate and a handle, wherein the conductive plate is fixedly arranged in a wiring cavity of the plastic body, one end of the spring sheet installed in the wiring cavity forms a clamping structure with the conductive plate that can clamp the wire, one end of the handle is provided with a rotating shaft or a sleeve rotatably installed in the wiring cavity, and the handle can be rotated forward to move one end of the spring sheet toward a direction away from the conductive plate to open the clamping structure, and a metal reinforcement member fixedly installed in the wiring cavity of the plastic body comprises a spring sheet support limiting portion and a handle support limiting portion, the other end of the spring sheet is stopped and positioned on the surface of the spring sheet support limiting portion, and the surface of the handle support limiting portion is supported on the outer side of the circumference of the rotating shaft or the sleeve at one end of the handle. The utility model avoids deformation of the inner side wall of the wiring cavity of the plastic body due to the pressure of the spring sheet and the handle, ensures the stability of the terminal block clamping the wire, and ensures that the handle can be opened and closed accurately.

Description

Technical Field

[0001] The utility model relates to a terminal block for wiring, in particular to a spring wiring terminal block. Background Art

[0002] The terminal block for wiring generally includes a plastic body, a conductive plate, a spring sheet and a handle. A wiring cavity is formed in the plastic body, and a wire entry hole connected to the wiring cavity is formed on the side wall of the plastic body. The flat conductive plate is fixedly inserted in the wiring cavity, and the spring sheet is installed in the plastic body, one end of which forms a clip structure for elastically clamping the wire with the conductive plate, and the other end is tightly against the inner side wall of the wiring cavity of the plastic body for limiting the spring sheet. The handle is rotatably installed on the plastic body. When the handle is rotated, the eccentric cam on the handle elastically deforms the side wall of one end of the spring sheet to enlarge the opening of the clip structure for feeding or withdrawing the wire. After the feeding or withdrawing of the wire is completed, the handle is pulled in the opposite direction, and the handle is reversed and reset under the action of the elastic reset force of one end of the spring sheet. After the handle is reset to a certain angle, it is blocked by the inner side wall of the wiring cavity of the plastic body and stops rotating. At this time, the handle is kept in this position by the elastic pressure of one end of the spring sheet and the blocking of the inner side wall of the wiring cavity.

[0003] The other end of the spring clip in the terminal block is limited by pressing against the inner side wall of the wiring cavity of the plastic body. When the spring clip clamps the wire, the inner side wall of the wiring cavity of the plastic body is subjected to a large elastic pressure and is easily deformed, resulting in unstable clamping.

[0004] One end of the handle is located in the wiring cavity of the plastic body, and it is also limited by pressing against the inner wall of the insulating wiring cavity. When the other end of the handle is pulled to rotate and deform one end of the spring, the pressure exerted by one end of the handle on the inner wall of the wiring cavity of the plastic body can easily cause the plastic body to deform, resulting in the handle not being able to open and close properly. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a spring terminal block, which can improve the stability of the spring clip wire and the stability of the handle rotation position.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a spring terminal block, comprising a plastic body, a spring sheet, a conductive plate and a handle, wherein a wiring cavity is formed in the plastic body, the conductive plate is fixedly arranged in the wiring cavity, the spring sheet that is elastically deformed by changing the bending angle is installed in the wiring cavity, one end of the spring sheet and the conductive plate form a clamping structure that can clamp the wire extending into the wiring cavity, one end of the handle is provided with a rotating shaft or a sleeve that can be rotatably installed in the wiring cavity, and the positive rotation of the handle can move one end of the spring sheet toward a direction away from the conductive plate to open the clamping structure, and a metal reinforcement is also provided, the metal reinforcement is fixedly installed in the wiring cavity of the plastic body, the metal reinforcement comprises a spring sheet support limiting portion and a handle support limiting portion, the other end of the spring sheet is stopped and positioned on the surface of the spring sheet support limiting portion, and the surface of the handle support limiting portion is supported on the outer side of the circumference of the rotating shaft or the sleeve at one end of the handle.

[0007] As a further improvement of the present invention, one end of the handle is further provided with an angle limiting surface tangent to the rotating shaft or the shaft sleeve, and the angle limiting surface at one end of the handle stops on the surface of the handle support limiting portion to limit the reverse rotation angle of the handle.

[0008] As a further improvement of the present invention, the handle support limit portion of the metal reinforcement is a V-shaped bending structure with an obtuse angle.

[0009] As a further improvement of the present invention, the spring sheet is a V-shaped bending structure, and a spring sheet limiting boss is formed in the wiring cavity. An elastic limiting groove matching the shape of the bending portion of the spring sheet is formed between the spring sheet limiting boss and the inner wall of the wiring cavity. The bending portion of the spring sheet can only be bent and deformed within a set angle range and is inserted into the elastic limiting groove. The other end of the spring sheet is tightly pressed against the surface of the spring sheet support limiting portion against the side wall surface facing the outer side of the V-shaped structure of the spring sheet.

[0010] As a further improvement of the present invention, the metal reinforcement also includes an L-shaped connecting main body portion, the spring support limiting portion and the handle support limiting portion are integrally formed on the connecting main body portion, the connecting main body portion and the spring support limiting portion together form a U-shaped structure, and a reinforcement positioning groove structure is provided on the inner side wall of the wiring cavity of the plastic body, the connecting main body portion of the metal reinforcement is inserted into the reinforcement positioning groove structure, and the U-shaped structure formed by the connecting main body portion and the spring support limiting portion of the metal reinforcement is tightly pressed against the inner side wall of the wiring cavity and the inner side wall surface of the reinforcement positioning groove structure in the front-to-back, left-to-right and up-and-down directions, thereby being fixed in position.

[0011] As a further improvement of the utility model, the conductive plate is fixedly covered on the opening of the reinforcement positioning groove structure, and an avoidance gap is formed on the conductive plate for a side wall of the U-shaped structure bottom surface formed by the connecting main body of the metal reinforcement to extend out.

[0012] As a further improvement of the present invention, a connecting piece extends from the side wall of the bottom surface of the U-shaped structure formed by the connecting main body of the metal reinforcement, and the handle support limit part is integrally formed on the connecting piece by bending, and the connecting piece stops on the surface of the conductive plate facing the wire insertion end.

[0013] As a further improvement of the present invention, the spring-type support limiting portion of the metal reinforcement and the side wall connecting the main body and parallel to the spring-type support limiting portion are both provided with a T-shaped opening structure whose opening size is smaller than the internal size, and limiting protrusions are both provided on the bottom surface of the reinforcement positioning groove structure and on the inner side wall of the wiring cavity and the reinforcement positioning groove structure opening, and the limiting protrusions can be clamped in the T-shaped opening structure one by one.

[0014] As a further improvement of the present invention, an inwardly concave supporting step groove is formed on the inner side wall of the wiring cavity of the plastic body, the handle supporting limit portion on the metal reinforcement is accommodated in the supporting step groove, and the handle supporting limit portion is used to support the surface of the rotating shaft or sleeve at one end of the handle to be aligned and connected with the inner side wall of the wiring cavity of the plastic body.

[0015] As a further improvement of the present invention, a handle shaft and a handle supporting arc surface are fixedly provided in the wiring cavity of the plastic body, the handle supporting arc surface is concentrically arranged on the outside of the handle shaft, the sleeve at one end of the handle is sleeved on the outside of the handle shaft, the handle supporting arc surface is supported on the outside of the sleeve at one end of the handle, and the handle supporting arc surface is connected with the surface of the handle support limiting portion of the metal reinforcement along the axial direction of the handle shaft.

[0016] The beneficial technical effect of the utility model is as follows: the utility model fixes a metal reinforcement in the wiring cavity of the plastic body, and a spring support and limit portion and a handle support and limit portion are formed on the metal reinforcement. The spring support and limit portion supports and limits the other end of the spring, and the handle support and limit portion supports the rotating portion of one end of the handle and blocks and limits the side wall of one end of the handle, thereby avoiding deformation of the inner side wall of the wiring cavity of the plastic body due to the pressure of the spring and the handle, which is beneficial to ensuring the stable positioning of the other end of the spring, and then ensuring the stability of the terminal block clamping, ensuring that the handle is stably supported during rotation, improving the position stability of the handle during rotation, and ensuring that the handle can be opened and closed accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the structural principle of the utility model;

[0018] Figure 2 This is the main view of the structural principle of the utility model;

[0019] Figure 3 It is a three-dimensional diagram of the plastic body of the utility model;

[0020] Figure 4 It is a three-dimensional diagram of the conductive plate of the utility model;

[0021] Figure 5 It is a three-dimensional diagram of the metal reinforcement of the utility model;

[0022] Figure 6 It is a three-dimensional diagram of the spring piece of the utility model;

[0023] Figure 7 This is a three-dimensional diagram of the handle of the utility model;

[0024] Figure 8 This is a three-dimensional diagram of the handle and the spring piece of the utility model being supported and limited by the metal reinforcement member;

[0025] Fig. 9 This is a front view of the handle and the spring piece of the utility model being supported and limited by the metal reinforcement;

[0026] Fig.10 This is a rear view of the handle and the spring sheet of the utility model being supported and limited by the metal reinforcement. DETAILED DESCRIPTION

[0027] Embodiment: A spring terminal block comprises a plastic body 1, a spring sheet 2, a conductive plate 3 and a handle 4, wherein a wiring cavity 11 is formed in the plastic body 1, the conductive plate 3 is fixedly arranged in the wiring cavity 11, the spring sheet 2 which is elastically deformed by changing the bending angle is installed in the wiring cavity 11, one end of the spring sheet 2 and the conductive plate 3 form a clamping structure which can clamp the wire extending into the wiring cavity 11, one end of the handle 4 is provided with a rotating shaft or a sleeve 41 which can be rotatably installed in the wiring cavity 11, the handle 4 can rotate forward to push one end of the spring sheet 2 to move in a direction away from the conductive plate 3 and thus open the clamping structure, and a metal reinforcement 5 is also provided, the metal reinforcement 5 is fixedly installed in the wiring cavity 11 of the plastic body 1, the metal reinforcement 5 comprises a spring sheet support limiting portion 51 and a handle support limiting portion 52, the other end of the spring sheet 2 is stopped and positioned on the surface of the spring sheet support limiting portion 51, and the surface of the handle support limiting portion 52 is supported on the outer circumference of the rotating shaft or sleeve 41 at one end of the handle 4.

[0028] When in use, the other end of the spring sheet 2 is supported and limited by the spring sheet support and limit portion 51 of the metal reinforcement 5, one end of the spring sheet 2 and the conductive plate 3 form a clip structure that can elastically clamp the wire, and the other end of the handle 4 extends out of the outside of the plastic body 1 to form an operating end. The operating end of the handle 4 is pulled to rotate one end of the handle 4. An eccentric cam structure is formed on the side wall of one end of the handle 4. The eccentric cam structure is tightly pressed against the side wall of one end of the spring sheet 2 and swings in a direction away from the conductive plate 3 to open the clip structure to achieve wire entry or withdrawal. When the handle 4 rotates, the circumferential outer wall of the rotating shaft or sleeve 41 at one end thereof is limited by the handle support of the metal reinforcement 5. The part 52 is used as auxiliary support for the incoming wire. During the long-term use of the terminal block, the inner wall of the wiring cavity 11 of the plastic body 1 will not be subjected to the pressure of the other end of the spring piece 2, nor will it be subjected to the pressure of the circumferential outer wall of the rotating shaft or the shaft sleeve 41 at one end of the handle 4. The inner wall of the wiring cavity 11 of the plastic body 1 will not be locally deformed. The other end of the spring piece 2 and the rotating shaft or the shaft sleeve 41 at one end of the handle 4 are always supported and limited by the high-strength metal reinforcement 5 for incoming wire, thereby ensuring that the positions of the rotating shaft or the shaft sleeve 41 at one end of the spring piece 2 and the handle 4 are always accurate, ensuring the stability of the wire clamping of the spring piece 2 and the accuracy of the opening and closing position of the handle 4.

[0029] One end of the handle 4 is also provided with an angle limiting surface 42 tangent to the rotating shaft or the shaft sleeve 41 , and the angle limiting surface 42 at one end of the handle 4 stops on the surface of the handle support limiting portion 52 to limit the reverse rotation angle of the handle 4 .

[0030] When the handle 4 is rotated in the opposite direction to the initial state, the corner limit surface 42 at one end thereof is in close contact with the handle support limit portion 52 on the metal reinforcement 5, thereby limiting the reverse rotation angle of the handle 4. After the handle 4 is rotated in the opposite direction to the initial position, the corner limit surface 42 thereof is blocked and limited by the handle support limit portion 52, and at the same time, the eccentric cam thereon is subjected to the elastic pressure of the side wall at one end of the spring sheet 2, so that the handle 4 is stably in this state and remains unchanged. When the wire is withdrawn, the side wall at one end of the spring sheet 2 is blocked by the eccentric cam on the reset handle 4, and the side wall at one end of the spring sheet 2 can only be reset to a certain angle, and it always forms a stable clip structure with the conductive plate 3, which will not cause failure of the clip structure. The limitation of the reverse rotation position of the handle 4 is realized by the handle support limit portion 52 of the metal reinforcement 5, thereby ensuring the accurate position of the handle 4 when it is rotated in the opposite direction to the closed position.

[0031] The handle support limiter 52 of the metal reinforcement 5 is a V-shaped bending structure with an obtuse angle. The handle support limiter 52 V-shaped bending structure is connected by an arc surface transition in the middle, thereby achieving stable support of the rotating shaft or sleeve 41 at one end of the handle 4 by the handle support limiter 52.

[0032] The spring piece 2 is a V-shaped bending structure, and a spring piece limiting boss 12 is formed in the wiring cavity 11. An elastic limiting groove matching the shape of the bending part of the spring piece 2 is formed between the spring piece limiting boss 12 and the inner wall of the wiring cavity 11. The bending part of the spring piece 2 can only be bent and deformed within a set angle range and inserted into the elastic limiting groove. The other end of the spring piece 2 is tightly pressed against the surface of the spring piece support limiting part 51 with the side wall surface facing the outside of the V-shaped structure of the spring piece 2.

[0033] The metal reinforcement 5 also includes an L-shaped connecting body 53, the spring support limiter 51 and the handle support limiter 52 are integrally formed on the connecting body 53, the connecting body 53 and the spring support limiter 51 together form a U-shaped structure, the inner wall of the wiring cavity 11 of the plastic body 1 is provided with a reinforcement positioning groove structure 13, the connecting body 53 of the metal reinforcement 5 is inserted into the reinforcement positioning groove structure 13, and the U-shaped structure formed by the connecting body and the spring support limiter of the metal reinforcement 5 is tightly pressed against the inner wall of the wiring cavity 11 and the inner wall surface of the reinforcement positioning groove structure 13 along the front-back, left-right and up-down directions, and is fixed and positioned. The metal reinforcement 5 is formed by bending a metal sheet to form an integrally formed structure, which has a simple structure and high overall strength. It uses the outer wall to fit closely with the inner wall of the wiring cavity 11 of the plastic body 1 for fixed positioning, which is convenient for installation and positioning.

[0034] The conductive plate 3 is fixedly covered on the opening of the reinforcement member positioning groove structure, and a relief notch 31 is formed on the conductive plate 3 for a side wall of the connection main body 53 of the metal reinforcement member 5 to extend out of the bottom surface of the U-shaped structure. The reinforcement member positioning groove structure 13 on the inner side wall of the wiring cavity 11 of the plastic body 1 is designed on a side wall where the conductive plate 3 is installed. On the one hand, it can be used to insert and position the metal reinforcement member 5, and at the same time avoid the conductive plate 3. The conductive plate 3 can also be used to block and position a side wall of the connection main body 53 of the metal reinforcement member 5. The structure is simple and the positioning is stable.

[0035] A connecting piece 54 extends from the side wall of the bottom surface of the U-shaped structure formed by the connecting body part 53 of the metal reinforcement 5, and the handle support limit part 52 is integrally formed on the connecting piece 54 by bending, and the connecting piece 54 stops on the surface of the conductive plate 3 facing the wire insertion end. The connecting piece 54 realizes the integral formation of the handle support limit part 52 on the connecting body part 53 of the metal reinforcement 5, and the connecting piece 54 can also position the end of the conductive plate 3 facing the wire insertion end to prevent the end of the conductive plate 3 facing the wire insertion end from tilting.

[0036] The spring support limiter 51 of the metal reinforcement 5 and the side wall of the connecting body 53 parallel to the spring support limiter 51 are both provided with a T-shaped opening structure 55 whose opening size is smaller than the internal size. The bottom surface of the reinforcement positioning groove structure 13 and the inner side wall of the wiring cavity 11 facing the opening of the reinforcement positioning groove structure 13 are both provided with limit protrusions 14, and the limit protrusions 14 can be clamped in the T-shaped opening structure 55 in a one-to-one correspondence. When the metal reinforcement 5 is assembled in the plastic body 1, the limit protrusions 14 on the plastic body 1 are inserted into the T-shaped opening structure 55 on the two side walls of the U-shaped structure formed by the metal reinforcement 5, which can further stably position the metal reinforcement 5.

[0037] An inwardly concave support step groove 15 is formed on the inner side wall of the wiring cavity 11 of the plastic body 1, and the handle support limit portion 52 on the metal reinforcement 5 is accommodated in the support step groove 15, and the handle support limit portion 52 is used to support the surface of the rotating shaft or sleeve 41 at one end of the handle 4 to align and connect with the inner side wall of the wiring cavity 11 of the plastic body 1. The handle support limit portion 52 of the metal reinforcement 5 is accommodated and supported in the support step groove 15 on the inner side wall of the plastic body 1, which can ensure that the handle support limit portion 52 of the metal reinforcement 5 is accurately positioned. At the same time, the handle support limit portion 52 of the metal reinforcement 5 is hidden in the support step groove 15, which saves more internal space of the wiring cavity 11 of the plastic body 1.

[0038] A handle shaft 16 and a handle holding arc surface 17 are fixedly disposed in the wiring cavity 11 of the plastic body 1. The handle holding arc surface 17 is concentrically disposed outside the handle shaft 16. The shaft sleeve 41 at one end of the handle 4 is sleeved outside the handle shaft 16. The handle holding arc surface 17 is supported outside the shaft sleeve 41 at one end of the handle 4. The handle holding arc surface 17 is connected to the surface of the handle support and limit portion 52 of the metal reinforcement 5 along the axial direction of the handle shaft 16. The handle holding arc surface 17 in the plastic body 1 is spliced ​​with the handle support and limit portion 52 of the metal reinforcement 5, so as to stably support, guide and precisely limit the shaft sleeve 41 at one end of the handle 4.

Claims

1. A spring terminal block, comprising a plastic body (1), a spring sheet (2), a conductive plate (3) and a handle (4), wherein a connection cavity (11) is formed in the plastic body, the conductive plate is fixedly arranged in the connection cavity, the spring sheet which is elastically deformed by changing the bending angle is installed in the connection cavity, one end of the spring sheet and the conductive plate form a clip structure capable of clamping a wire inserted into the connection cavity, one end of the handle is provided with a rotating shaft or a sleeve (41) which can be rotatably installed in the connection cavity, and the handle can be rotated in a positive direction to move one end of the spring sheet in a direction away from the conductive plate, thereby opening the clip structure, wherein the characteristics are as follows: A metal reinforcement (5) is also provided, the metal reinforcement being fixedly mounted in the wiring cavity of the plastic body, the metal reinforcement comprising a spring support limiting portion (51) and a handle support limiting portion (52), the other end of the spring being stopped and positioned on the surface of the spring support limiting portion, the surface of the handle support limiting portion being supported on the outer side of the circumference of the rotating shaft or the sleeve at one end of the handle.

2. The spring terminal block according to claim 1, characterized in that: One end of the handle is also provided with an angle limiting surface (42) tangent to the rotating shaft or the shaft sleeve, and the angle limiting surface at one end of the handle stops on the surface of the handle support limiting portion to limit the reverse rotation angle of the handle.

3. The spring terminal block according to claim 2, characterized in that: The handle support limiting portion of the metal reinforcement is a V-shaped bending structure with an obtuse angle.

4. The spring terminal block according to claim 1 is characterized in that: the spring sheet is a V-shaped bending structure, a spring sheet limiting boss (12) is formed in the wiring cavity, and an elastic limiting groove matching the shape of the bending part of the spring sheet is formed between the spring sheet limiting boss and the inner wall of the wiring cavity, the bending part of the spring sheet can only be bent and deformed within a set angle range and inserted into the elastic limiting groove, and the other end of the spring sheet is tightly pressed against the surface of the spring sheet support limiting part against the side wall surface facing the outer side of the V-shaped structure of the spring sheet.

5. The spring terminal block according to claim 1 or 4, characterized in that: The metal reinforcement also includes an L-shaped connecting body (53), the spring support limiting part and the handle support limiting part are integrally formed on the connecting body, the connecting body and the spring support limiting part together form a U-shaped structure, a reinforcement positioning groove structure (13) is provided on the inner side wall of the wiring cavity of the plastic body, the connecting body of the metal reinforcement is inserted into the reinforcement positioning groove structure, and the U-shaped structure formed by the connecting body and the spring support limiting part of the metal reinforcement is tightly pressed against the inner side wall of the wiring cavity and the inner side wall surface of the reinforcement positioning groove structure in the front-back, left-right and up-down directions, and is fixed in position.

6. The spring terminal block according to claim 5, characterized in that: The conductive plate is fixedly covered on the opening of the reinforcement member positioning groove structure, and a relief notch (31) is formed on the conductive plate for a side wall of the U-shaped structure bottom surface formed by the connection main body of the metal reinforcement member to extend out.

7. The spring terminal block according to claim 6, characterized in that: A connecting piece (54) extends from the side wall of the bottom surface of the U-shaped structure formed by the connecting main body of the metal reinforcement, and the handle support limit part is integrally formed on the connecting piece by bending, and the connecting piece stops on the surface of the conductive plate facing the wire insertion end.

8. The spring terminal block according to claim 5, characterized in that: The spring-type support and limiting portion of the metal reinforcement and the side wall of the connecting body part parallel to and directly opposite to the spring-type support and limiting portion are both provided with a T-shaped opening structure (55) whose opening size is smaller than the internal size; the bottom surface of the reinforcement positioning groove structure and the inner side wall of the wiring cavity and directly opposite to the opening of the reinforcement positioning groove structure are both provided with limiting protrusions (14); the limiting protrusions can be clamped in the T-shaped opening structure in a one-to-one correspondence.

9. The spring terminal block according to claim 5, characterized in that: An inwardly concave support step groove (15) is formed on the inner side wall of the wiring cavity of the plastic body, and the handle support limit portion on the metal reinforcement is accommodated in the support step groove, and the handle support limit portion is used to support the surface of the rotating shaft or sleeve at one end of the handle to be aligned and connected with the inner side wall of the wiring cavity of the plastic body.

10. The spring terminal block according to claim 1, characterized in that: A handle shaft (16) and a handle supporting arc surface (17) are also fixedly provided in the wiring cavity of the plastic body, the handle supporting arc surface is coaxially arranged on the outside of the handle shaft, the shaft sleeve at one end of the handle is sleeved on the outside of the handle shaft, the handle supporting arc surface is supported on the outside of the shaft sleeve at one end of the handle, and the handle supporting arc surface is connected with the surface of the handle support limiting portion of the metal reinforcement along the axial direction of the handle shaft.

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