CN113690106A

CN113690106A - Circuit breaker and wiring terminal thereof

Info

Publication number: CN113690106A
Application number: CN202110948465.XA
Authority: CN
Inventors: 张进; 袁高普; 邓小军
Original assignee: Jiaxing Jingsi Intelligent Technology Co ltd
Current assignee: Jiaxing Jingsi Intelligent Technology Co ltd
Priority date: 2021-08-18
Filing date: 2021-08-18
Publication date: 2021-11-23

Abstract

The invention discloses a circuit breaker and a wiring terminal thereof, wherein the wiring terminal comprises a bracket, a wiring elastic sheet, a wiring board and an adjusting mechanism, wherein the wiring elastic sheet, the wiring board and the adjusting mechanism are arranged on the bracket, the wiring board is used for externally connecting a conductor, the wiring elastic sheet is used for tightly pressing the wiring board and the conductor so as to enable the wiring board to be in close contact with the conductor, and the adjusting mechanism is used for adjusting the position of the wiring elastic sheet. The invention can carry out wiring conveniently and reliably.

Description

Circuit breaker and wiring terminal thereof

Technical Field

The invention relates to the technical field of electrical equipment, in particular to a circuit breaker, and specifically relates to a circuit breaker and a wiring terminal thereof.

Background

In order to connect the main circuit and the external circuit, the circuit breaker is generally provided with a terminal connected with an external wire. Generally, the direction of the force for the wiring operation of the wiring terminal is perpendicular to the wiring direction, that is, the direction of the external force for the wiring operation is not in the same direction as the wiring direction of the lead, so that at least two directions of space are required for the operation in the wiring process of the wiring terminal, and the occupied space is large. However, some circuit breakers are installed in a narrow space, and only the wiring direction of the circuit breaker has space for wiring operation, so that the wiring terminals of such products cannot be wired in a conventional manner. One of the existing solutions is to adopt the elastic sheet type connection when being used for the electrical connection with smaller current specification, adopt the composite terminal to solve through the screw tightening mode during large current, and it does not compromise the reliability that the electrical connection is realized through the screw tightening mode by the composite terminal when small current is also needed. The composite connecting terminal disclosed in chinese patent publication No. CN201811341835.8 solves the above problems to some extent, but has the following disadvantages: (1) the rotation angle of the elastic sheet is too large, so that the stroke of the screw is too large, and the screw adopts a flat head to occupy the rotation angle of the elastic sheet, so that the volume of the whole terminal is large, and the terminal cannot be well applied to a breaker with a smaller shell frame; (2) the spring piece is contacted with the single piece of the wiring board, so that the risk of switch failure caused by loose connection of wires exists; (3) the shaft end is fastened in a flat riveting mode, so that the local expansion of the shaft is easily caused, and the rotation reliability of the elastic sheet is influenced; (4) the nut is thick, and processing technology and part size are difficult to guarantee, and can not guarantee to lock the locking force in terminal inside screwing up the in-process, but have made the casing produce the deformation easily on having transmitted the plastics casing through the nut. In view of the unsatisfactory nature of the existing circuit breaker terminals, there is a need for improvement.

Disclosure of Invention

In view of the shortcomings of the prior art, the invention aims to provide a circuit breaker and a wiring terminal thereof, which are used for conveniently and reliably wiring.

In order to solve the technical problems, the technical scheme provided by the invention is as follows:

a wiring terminal comprises a support, and a wiring elastic sheet, a wiring board and an adjusting mechanism which are arranged on the support, wherein the wiring board is used for externally connecting a conductor, the wiring elastic sheet is used for pressing the wiring board and the conductor so as to enable the wiring board to be in close contact with the conductor, and the adjusting mechanism is used for adjusting the position of the wiring elastic sheet.

Preferably, the support sets up open inner chamber, and the wiring shell fragment is rotationally installed in the support and is held in the inner chamber, and the wiring board is located the inner chamber top, and adjustment mechanism is used for driving the wiring shell fragment upwards to rotate and compresses tightly wiring board and conductor.

Preferably, wiring shell fragment one side has the portion of gyration, and the wiring shell fragment opposite side has first tab portion and second tab portion, and the portion of gyration is used for rotationally adorning the wiring shell fragment in the support through the split pin, and first tab portion takes in the inner chamber back wall when non-wiring state, and first tab portion and second tab portion can compress tightly wiring board and conductor when wiring state.

Preferably, a driving part is arranged between the first folding part and the rotary part, and the driving part drives the wiring elastic sheet to rotate through the adjusting mechanism.

Preferably, a first included angle between the driving portion and the first tab portion and a second included angle between the driving portion and the second tab portion are obtuse angles respectively, the first tab portion is longer than the second tab portion, and the first included angle is smaller than the second included angle.

Preferably, the adjusting mechanism comprises a nut and a screw, the nut is positioned on the bracket, the screw penetrates through the nut and is internally provided with an inner cavity and is positioned at the lower part of the wiring elastic sheet, and the screw can contact the driving part so as to drive the wiring elastic sheet to rotate around the cotter pin by screwing the screw.

Preferably, a nut groove is formed between the inner cavity front wall and the inner cavity side wall, a screw hole is formed in the inner cavity front wall, the nut is positioned in the nut groove, and the screw can penetrate through the screw hole and is limited by the inner cavity rear wall.

Preferably, the front of the screw is unthreaded; and/or the front end of the screw is provided with a conical tip.

Preferably, the top of the bracket and the side wall of the wiring board are tightly matched through a clamping groove structure.

On the basis, the invention provides a circuit breaker which is provided with the wiring terminal.

Compared with the prior art, the wiring terminal in the circuit breaker can be used for wiring conveniently and reliably, and the preferred embodiment of the circuit breaker comprises the following effects: (1) the unique characteristic design of the double-clamping elastic sheet is firmer and more reliable in electrical connection compared with the traditional design of a single-clamping elastic sheet; (2) the unique split pin support design saves one process compared with the traditional shaft type riveting flat design, and the problem that one end expands due to shaft type riveting to influence the rotation clamping stagnation of the elastic sheet is avoided; (3) the wiring screw is limited in the assembly in the whole wiring process, so that the locking force is not easy to be transferred to the plastic shell, and the shell is cracked; (4) compared with the traditional flat head screw, the unique tip screw design saves more elastic sheet rotating space, so that the wiring terminal assembly is more suitable for small current circuit breakers with higher volume requirements.

Drawings

FIG. 1 is a schematic view of a terminal assembly of the present invention;

fig. 2 is a sectional view of the initial position of the connection terminal in the present invention;

fig. 3 is a sectional view showing a terminal tightening position in the present invention;

FIG. 4 is a first perspective view of the stand of the present invention;

FIG. 5 is a second perspective view of the stand of the present invention;

FIG. 6 is a schematic view of a wiring spring of the present invention;

figure 7 is a schematic diagram of a patch panel of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments, but it should not be construed that the scope of the present invention is limited to the embodiments described below.

Referring to fig. 1 to 7, the invention provides a circuit breaker and a terminal, wherein the terminal comprises a bracket 1, a cotter pin 2, a nut 3, a terminal spring 4, a terminal board 5, a conductor 6, a screw 7 and the like, which are further described as follows.

As shown in fig. 1-3, a wiring elastic sheet 4, a wiring board 5 and an adjusting mechanism are mounted on the bracket 1, wherein the wiring board 5 is used for externally connecting a conductor 6, the wiring elastic sheet 4 is used for pressing the wiring board 5 and the conductor 5 to make the two closely contact, and the adjusting mechanism specifically comprises a screw 7 and a nut 3 for adjusting the position of the wiring elastic sheet 4.

As shown in fig. 4-5 and referring to fig. 1-3, the bracket 1 is provided with an open cavity 15, the wiring elastic sheet is rotatably mounted on the bracket 1 and accommodated in the cavity 15, the wiring board 5 is located above the cavity 15, and the adjusting mechanism is used for driving the wiring elastic sheet 4 to rotate upwards to press the wiring board 5 and the conductor 6.

Here, the adjusting mechanism includes a nut 3 and a screw 7, wherein the front portion of the screw 7 is unthreaded and the tip of the screw 7 is provided with a tapered tip 71. The mounting structure is as follows: the nut 3 is positioned on the bracket 1, the screw 7 penetrates through the nut 3 and is internally provided with the inner cavity 15 and is positioned at the lower part of the wiring elastic sheet 4, and the screw 7 can contact with the driving part of the wiring elastic sheet 4 so as to drive the wiring elastic sheet 4 to rotate around the cotter pin 2 by screwing the screw 7. Specifically, a nut groove 18 is arranged between the inner cavity front wall 13 and the inner cavity side wall 17 of the installation cavity of the nut 3 and the screw, the inner cavity front wall 13 is provided with a screw hole 19, the nut 3 is positioned in the nut groove 18, and the screw 7 can pass through the screw hole 19 and is limited by the inner cavity rear wall 12.

As shown in fig. 6, and referring to fig. 1-5, the terminal strip is a double-clamping strip, one side of which has a turning portion 45, and the other side of which has a first tab portion 43 and a second tab portion 46, the turning portion 45 is used to rotatably mount the terminal strip 4 on the support 1 through the cotter pin 2, wherein the first tab portion 42 overlaps the top of the cavity back wall 12 in the non-wiring state, and the first tab portion 43 and the second tab portion 46 can press the terminal block 5 and the conductor 6 in the wiring state.

As shown in fig. 6, a driving portion 41 is further disposed between the first tab portion 42 and the turning portion 45, and the driving portion 41 drives the wire dome 4 to rotate through an adjusting mechanism. Here, a first included angle between the driving portion 41 and the first tab portion 42 and a second included angle between the driving portion 42 and the second tab portion 46 are obtuse angles, respectively, wherein the first tab portion 43 is longer than the second tab portion, and the first included angle is smaller than the second included angle.

As shown in fig. 7, the support 1 and the wiring board 5 are tightly combined, specifically, a T-shaped slot 51 is arranged on the side wall of the wiring board 5, and a T-shaped clamping table 16 is arranged on the top of the side wall 17 of the support 1, so that a slot structure is formed to realize tight fit. Here, the double T-shaped clamping platforms 16 on the bracket 1 are tightly matched with the corresponding T-shaped clamping grooves 51 on the wiring board 5, so that the whole material of a factory can be fed, and the assembly efficiency is improved.

The assembly process and the working principle of the present invention are as follows.

The rotating part 45 of the terminal spring plate 4 is assembled in the inner cavity 15 of the bracket 1 through the cotter pin 2, and the screw 7 passes through the nut 3 and is arranged at the lower part of the terminal spring plate 4. The adjusting mechanism composed of the nut 3 and the screw 7 can drive the wiring elastic sheet 4 to rotate upwards to press the wiring board 5 and the conductor 6 tightly.

When the external conductor 6 is not connected, the assembly state is as shown in fig. 2, and the first folding edge 42 of the wiring elastic sheet 4 is lapped on the top 11 of the inner cavity back wall 12 of the bracket 1. By screwing the screw 7, the wiring elastic sheet 4 can be rotated upwards. Wherein the tip screw 7 gives the terminal dome 4 more rotational space than a grub screw, resulting in a smaller overall terminal assembly.

When the screw 7 is screwed, the screw conical tip 71 pushes the bottom driving part 41 of the terminal spring 4 to rotate the terminal spring 4 counterclockwise, and the final position is shown in fig. 3. At this time, the front part of the screw 7 abuts against the driving part 41 of the terminal spring 4, and the top 43 of the first folded edge 42 and the top 44 of the second folded edge 46 of the terminal spring 4 are pressed and deformed to press the external conductor 6 and the terminal board 5 to be in close contact with each other, thereby realizing electrical connection. Meanwhile, the conical tip 71 of the screw 7 and the rear wall 12 of the inner cavity of the bracket 1 are limited and stop rotating, and cannot be screwed again.

In the whole screwing process, the screw 7 and the nut 3 are matched with the nut hole 19 and the nut groove 18 at the front wall 13 of the inner cavity of the support 1, so that locking force is not easy to be released outwards, and the screw supporting part 14 is arranged on the support 1 and supports the screw 7, so that the screw 7 is not inclined downwards due to the counter force of the wiring elastic sheet 4 in the whole screwing process to cause the deformation of the whole assembly. In addition, the front part of the screw 7 is not threaded, so that the screw 7 is not easy to fall off in the process of loosening.

The above embodiments include, but are not limited to, the following advantages: (1) the unique characteristic design of the double-clamping elastic sheet is firmer and more reliable in electrical connection compared with the traditional design of a single-clamping elastic sheet; (2) the unique split pin support design saves one process compared with the traditional shaft type riveting flat design, and the problem that one end expands due to shaft type riveting to influence the rotation clamping stagnation of the elastic sheet is avoided; (3) the wiring screw is limited in the assembly in the whole wiring process, so that the locking force is not easy to be transferred to the plastic shell, and the shell is cracked; (4) the unique tip screw design saves more spring plate rotating space than the traditional flat head screw, so that the wiring terminal component of the design is more suitable for a small current circuit breaker with higher volume requirement.

Above binding post not only can be applicable to the circuit breaker electrical connection usefulness of heavy current, and unique structural design makes its smaller and more exquisite reliable, therefore can be applicable to that little electric current small size circuit breaker is used, and the wiring is more reliable.

Although the present invention has been described with reference to the preferred embodiments, it should be understood that the scope of the present invention is not limited to the embodiments described above, and that various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the present invention.

Claims

1. The utility model provides a wiring terminal, its characterized in that includes the support and adorns in wiring shell fragment, wiring board and the adjustment mechanism of support, and the wiring board is used for external conductor, and the wiring shell fragment is used for compressing tightly wiring board and conductor so that wiring board and conductor in close contact with, and adjustment mechanism is used for adjusting the position of wiring shell fragment.

2. The terminal of claim 1, wherein the frame defines an open interior, the terminal strip is pivotally mounted to the frame and received in the interior, the terminal block is positioned above the interior, and the adjustment mechanism is configured to drive the terminal strip upward to compress the terminal block and the conductor.

3. The terminal according to claim 2, wherein the terminal strip has a turn portion on one side and a first tab portion and a second tab portion on the other side, the turn portion being adapted to pivotally mount the terminal strip to the frame via the cotter pin, the first tab portion overlapping the rear wall of the cavity in the non-connecting state, and the first tab portion and the second tab portion being adapted to press the terminal strip and the conductor in the connecting state.

4. The terminal according to claim 3, wherein a driving portion is provided between the first tab portion and the turn portion, and the driving portion drives the terminal strip to rotate by the adjustment mechanism.

5. The connection terminal of claim 4, wherein a first angle between the driving portion and the first tab portion and a second angle between the driving portion and the second tab portion are obtuse angles, the first tab portion is longer than the second tab portion, and the first angle is smaller than the second angle.

6. The terminal according to claim 4, wherein the adjustment mechanism includes a nut and a screw, the nut is positioned on the bracket, the screw passes through the rear internal cavity of the nut and is positioned below the terminal spring, and the screw contacts the driving portion so as to drive the terminal spring to rotate around the cotter pin by screwing the screw.

7. The terminal of claim 7, wherein a nut slot is provided between the front wall of the interior chamber and the side wall of the interior chamber, the front wall of the interior chamber being provided with a screw hole, the nut being positioned in the nut slot, the screw being insertable through the screw hole and retained by the rear wall of the interior chamber.

8. The terminal of claim 7, wherein the front of the screw is unthreaded; and/or the front end of the screw is provided with a conical tip.

9. A terminal according to any one of claims 1 to 8, wherein the top of the carrier and the side wall of the terminal block are closely fitted by a bayonet arrangement.

10. A circuit breaker, characterized in that a connection terminal according to any one of claims 1-9 is provided.