Electrical switch

Abstract

The embodiment of the utility model provides an electrical switch. The electrical switch comprises a tripping piece which is suitable for switching the on-off state of the electrical switch; a first wiring piece and a second wiring piece; a first wiring terminal and a second wiring terminal, the first wiring terminal being adapted to lock the first external connecting piece to a position connected with the first wiring piece, and the second wiring terminal being adapted to lock the second external connecting piece to a position connected with the second wiring piece; one end of the first bimetallic strip is connected to the first wiring piece, the other end of the first bimetallic strip extends to a position adjacent to the tripping piece, and the first bimetallic strip is suitable for moving towards the tripping piece under the condition of thermal deformation so as to drive the tripping piece to switch the electrical switch to a breaking state; and one end of the second bimetallic strip is connected to the second wiring piece, the other end of the second bimetallic strip extends to a position adjacent to the tripping piece, and the second bimetallic strip is suitable for moving towards the tripping piece under the condition of thermal deformation so as to drive the tripping piece to switch the electrical switch to a breaking state.

Description

Technical Field

[0001] The embodiments of this disclosure generally relate to the field of electrical equipment technology, and more specifically, to electrical switches. Background Technology

[0002] As a protective switch, an electrical switch needs to carry and interrupt corresponding current. Electrical switches such as circuit breakers can cut off current when an overload, short circuit, or leakage fault occurs in the circuit, thereby protecting the safety of lines and equipment. Utility Model Content

[0003] In one aspect of this disclosure, an electrical switch is provided, comprising: a tripping element adapted to switch the electrical switch to an on / off state; a first connector and a second connector; a first terminal and a second terminal, the first terminal being adapted to lock a first external connector to a position connected to the first connector, and the second terminal being adapted to lock a second external connector to a position connected to the second connector; a first bimetallic strip, one end connected to the first connector and the other end extending to a position adjacent to the tripping element, the first bimetallic strip being adapted to move toward the tripping element upon thermal deformation to drive the tripping element to switch the electrical switch to an off state; and a second bimetallic strip, one end connected to the second connector and the other end extending to a position adjacent to the tripping element, the second bimetallic strip being adapted to move toward the tripping element upon thermal deformation to drive the tripping element to switch the electrical switch to an off state.

[0004] According to embodiments of this disclosure, if either the first terminal or the second terminal becomes abnormally hot due to accidental loosening, the heat on the corresponding terminal can be conducted to the corresponding bimetallic strip through the corresponding connector. In this way, the corresponding bimetallic strip can be bent by heat and drive the tripping element to switch the electrical switch to the open state, thereby realizing thermal tripping and avoiding damage to the electrical switch.

[0005] In some embodiments, the second bimetallic strip includes a connecting portion, an extension portion, and a driving portion, the extension portion being disposed between the connecting portion and the driving portion, the connecting portion being connected to the second connector, and the driving portion being adapted to drive the tripping element.

[0006] In some embodiments, when the second bimetallic strip is not deformed, the drive portion is spaced apart from the release member.

[0007] In some embodiments, the connection portion is welded to the second connector.

[0008] In some embodiments, the extension includes a first portion, a second portion, and a third portion disposed between the first portion and the second portion, the first portion being connected to the connecting portion and bent relative to the connecting portion, and the second portion being connected to the driving portion and bent relative to the driving portion.

[0009] In some embodiments, the third portion includes a single segment or multiple segments that are relatively bent.

[0010] In some embodiments, the first portion and the second portion are bent toward the same side of the third portion, and the first portion and the second portion are each set at a preset angle to the third portion.

[0011] In some embodiments, the electrical switch includes a circuit breaker.

[0012] It should be understood that the description in this section is not intended to limit the key or essential features of the embodiments of this disclosure, nor is it intended to restrict the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description

[0013] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. In the drawings, the same or similar reference numerals denote the same or similar elements, wherein:

[0014] Figure 1 A schematic diagram of the structure of an electrical switch according to some embodiments of the present disclosure is shown;

[0015] Figure 2 A partial structural schematic diagram of an electrical switch according to some embodiments of the present disclosure is shown;

[0016] Figure 3 A schematic diagram of the structure of a second bimetallic strip according to some embodiments of the present disclosure is shown.

[0017] Explanation of reference numerals in the attached figures:

[0018] 100 is an electrical switch;

[0019] 1 is a release element;

[0020] 21 is the first connector, and 22 is the second connector;

[0021] 31 is the first terminal block, and 32 is the second terminal block;

[0022] 4 is the first bimetallic strip, and 41 is the connecting strip;

[0023] 5 is the second bimetallic strip, 51 is the connecting part, 52 is the extension part, 521 is the first part, 522 is the second part, 523 is the third part, and 53 is the driving part;

[0024] 6 is the trip coil. Detailed Implementation

[0025] Preferred embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0026] The term "comprising" and its variations as used herein signify open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "at least partially based on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc., may refer to different or the same objects.

[0027] The terminals of conventional electrical switches are critical components for electrical connections, responsible for reliably connecting the switch's terminals to power lines, load lines, or other electrical equipment. Conventional electrical switches use tunnel-type terminals. When a terminal becomes accidentally loose, the pressure provided by the terminal decreases, reducing the contact area between the terminal and external connectors such as power lines or load lines. This increases contact resistance and causes abnormal heating of the terminal, potentially damaging the electrical switch.

[0028] In conventional electrical switches, one terminal of a pair of terminals is adjacent to the bimetallic strip. When the terminal adjacent to the bimetallic strip overheats abnormally, the heat can be conducted to the bimetallic strip, and the electrical switch can perform a thermal trip. However, the other terminal of the pair is far from the bimetallic strip. When the terminal far from the bimetallic strip overheats abnormally, even if the switch housing melts, the electrical switch does not perform a thermal trip. Based on this, embodiments of the present disclosure provide an electrical switch to at least partially solve the above-mentioned problems. In the following, [the following will be combined with...] Figures 1 to 3 The principles of this disclosure are described.

[0029] Figure 1 A schematic diagram of the structure of an electrical switch 100 according to some embodiments of the present disclosure is shown. Figure 2 A partial structural schematic diagram of an electrical switch 100 according to some embodiments of the present disclosure is shown. For example... Figure 1 and Figure 2 As shown, the electrical switch 100 includes a tripping element 1, which is adapted to switch the on / off state of the electrical switch 100. The tripping element 1 may include a tripped position and a conducting position. When the tripping element 1 is in the conducting position, the electrical switch 100 is in the conducting state. However, when the tripping element 1 moves to the tripped position, the electrical switch 100 switches to the disconnected state.

[0030] refer to Figure 1 and Figure 2 Furthermore, the electrical switch 100 includes a first connector 21 and a second connector 22. The first connector 21 and the second connector 22 are part of the main circuit of the electrical switch 100. The first connector 21 is used to connect to a first external connector. The second connector 22 is used to connect to a second external connector. Inside the electrical switch 100, the first connector 21 can be connected to one of the moving or stationary contacts. Correspondingly, the second connector 22 can be connected to the other of the moving or stationary contacts. For example, in some embodiments, the first connector 21 can be connected to a first bimetallic strip 4, and the first bimetallic strip 4 can be connected to the moving contact via a flexible wire (not shown). The second connector 22 can be indirectly connected to the stationary contact via a trip coil 6.

[0031] Continue to refer to Figure 1 and Figure 2 Furthermore, the electrical switch 100 includes a first terminal 31 and a second terminal 32. The first terminal 31 is adapted to lock a first external connector to a position connected to the first connector 21. The second terminal 32 is adapted to lock a second external connector to a position connected to the second connector 22. The first external connector may include one of a power line connected to an external power source and a load line connected to a load. Correspondingly, the second external connector may include the other of a power line and a load line.

[0032] Continue to refer to Figure 1 and Figure 2 In some embodiments, the electrical switch 100 includes a first bimetallic strip 4 and a second bimetallic strip 5. One end of the first bimetallic strip 4 is connected to a first connector 21, for example, via a connecting piece 41. The other end of the first bimetallic strip 4 extends to a position adjacent to the tripping member 1. In this way, if the first bimetallic strip 4 is deformed by heat, it can move toward the tripping member 1 and drive the tripping member 1 to switch the electrical switch 100 to the open state.

[0033] Similarly, one end of the second bimetallic strip 5 is connected to the second connector 22, and the other end of the second bimetallic strip 5 extends to a position adjacent to the tripping member 1. In this way, when the second bimetallic strip 5 is deformed by heat, the second bimetallic strip 5 can move toward the tripping member 1 and drive the tripping member 1 to switch the electrical switch 100 to the open state.

[0034] According to embodiments of this disclosure, if either the first terminal 31 or the second terminal 32 becomes abnormally hot due to accidental loosening, the heat on the corresponding terminal can be conducted to the corresponding bimetallic strip through the corresponding connector. In this way, the corresponding bimetallic strip can be bent by heat and drive the tripping element 1 to switch the electrical switch 100 to the open state, thereby realizing thermal tripping and avoiding damage to the electrical switch 100.

[0035] In some embodiments, such as Figure 1 and Figure 2 As shown, the tripping element 1 is closer to the first terminal 31 than the second terminal 32. The first bimetallic strip 4 is adjacent to the first terminal 31 and extends from the first connector 21 to a position adjacent to the tripping element 1. The main body of the first bimetallic strip 4 may extend in a direction substantially the same as or slightly inclined relative to the first connector 21. The first bimetallic strip 4 may adopt any known or future available structural form, and the second bimetallic strip 5 may also adopt any known or future available structural form; the embodiments of this disclosure are not limited in this regard.

[0036] The following text will describe an example structure of the second bimetallic strip 5 in conjunction with the accompanying drawings.

[0037] In some embodiments, such as Figure 1 and Figure 2 As shown, the second bimetallic strip 5 extends substantially toward the tripping member 1 in a direction away from the second terminal 32.

[0038] Figure 3 A schematic diagram of the structure of a second bimetallic strip 5 according to some embodiments of the present disclosure is shown. For example... Figure 2 and Figure 3 As shown, in some embodiments, the second bimetallic strip 5 may include a connecting portion 51, an extension portion 52, and a driving portion 53. The extension portion 52 may be disposed between the connecting portion 51 and the driving portion 53. The connecting portion 51 may be connected to the second connector 22, and the driving portion 53 is adapted to drive the tripping member 1.

[0039] To ensure a secure connection of the connector 51 to the second connector 22 and to achieve good heat conduction, refer to Figure 2 and Figure 3In some embodiments, the connecting portion 51 may be welded to the second connector 22. It should be understood that in other embodiments, the connecting portion 51 and the second connector 22 may be assembled using any other suitable connection method, such as by screws or other types of fasteners.

[0040] When the terminal block is securely connected, the heat generated by the terminal block is low. In this case, to prevent accidental tripping of the tripping element 1, refer to... Figure 2 and Figure 3 In some embodiments, when the second bimetallic strip 5 is not deformed, the drive unit 53 can be spaced apart from the tripping member 1. By setting the gap between the drive unit 53 and the tripping member 1, it is possible to prevent the second bimetallic strip 5 from accidentally triggering the tripping member 1, which helps to avoid the problem of the tripping member 1 accidentally tripping.

[0041] In order for the second bimetallic strip 5 to deform toward the tripping member 1 when heated, and for the drive unit 53 to drive the tripping member 1, refer to Figure 2 and Figure 3 In some embodiments, the extension 52 may include a first portion 521, a second portion 522, and a third portion 523. The third portion 523 may be disposed between the first portion 521 and the second portion 522. The first portion 521 may be connected to the connecting portion 51 and bent relative to the connecting portion 51. The second portion 522 may be connected to the driving portion 53 and bent relative to the driving portion 53. It is understood that by bending the extension 52, it is beneficial to avoid interference between the extension 52 and other components within the electrical switch 100. It should be understood that in other embodiments, the extension 52 may adopt any other suitable structure; for example, the extension 52 may also be disposed flat, and the embodiments of this disclosure are not limited thereto.

[0042] refer to Figure 2 and Figure 3 In some embodiments, the third portion 523 may include a single segment. In other embodiments, the third portion 523 may also include multiple relatively bent segments. In this way, when the second bimetallic strip 5 is heated, it is convenient for the second bimetallic strip 5 to deform toward the tripping member 1, and for the drive unit 53 to drive the tripping member 1.

[0043] refer to Figure 2 and Figure 3 Furthermore, the first portion 521 and the second portion 522 can be bent toward the same side of the third portion 523, and the first portion 521 and the second portion 522 are each set at a predetermined angle with the third portion 523, such as 145° or any other suitable angle. In this way, when the second bimetallic strip 5 is heated, it is convenient for the second bimetallic strip 5 to deform toward the release member 1, and it is convenient for the drive unit 53 to drive the release member 1.

[0044] It should be noted that the figures, values, and numbers mentioned above, as well as elsewhere in this disclosure, are exemplary and are not intended to limit the scope of this disclosure in any way. Any other suitable figures, values, and numbers are possible. For example, depending on the specific application scenario and requirements, the preset angle may include more or fewer values.

[0045] The bimetallic strip design according to embodiments of this disclosure can be applied to various electrical switches, such as circuit breakers. It should be understood that the bimetallic strip design according to embodiments of this disclosure can also be applied to other electrical components, and the embodiments of this disclosure are not limiting in this regard.

[0046] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. An electrical switch (100), characterized in that, The electrical switch (100) includes: Tripping element (1) is adapted to switch the on / off state of the electrical switch (100); First connector (21) and second connector (22); A first terminal (31) and a second terminal (32), the first terminal (31) being adapted to lock a first external connector to a position connected to the first connector (21), and the second terminal (32) being adapted to lock a second external connector to a position connected to the second connector (22); A first bimetallic strip (4), one end connected to the first connector (21), and the other end extending to a position adjacent to the tripping element (1), the first bimetallic strip (4) being adapted to move toward the tripping element (1) in the event of thermal deformation, so as to drive the tripping element (1) to switch the electrical switch (100) to the open state; and The second bimetallic strip (5) is connected at one end to the second connector (22) and extends at the other end to a position adjacent to the trip member (1). The second bimetallic strip (5) is adapted to move toward the trip member (1) when deformed by heat, so as to drive the trip member (1) to switch the electrical switch (100) to the disconnected state.

2. The electrical switch (100) according to claim 1, characterized in that, The second bimetallic strip (5) includes a connecting portion (51), an extension portion (52), and a driving portion (53). The extension portion (52) is disposed between the connecting portion (51) and the driving portion (53). The connecting portion (51) is connected to the second connector (22), and the driving portion (53) is adapted to drive the tripping member (1).

3. The electrical switch (100) according to claim 2, characterized in that, When the second bimetallic strip (5) is not deformed, the drive part (53) is spaced apart from the release member (1).

4. The electrical switch (100) according to claim 2, characterized in that, The connecting part (51) is welded to the second connector (22).

5. The electrical switch (100) according to claim 2, characterized in that, The extension (52) includes a first part (521), a second part (522), and a third part (523) disposed between the first part (521) and the second part (522). The first part (521) is connected to the connecting part (51) and is bent relative to the connecting part (51), and the second part (522) is connected to the driving part (53) and is bent relative to the driving part (53).

6. The electrical switch (100) according to claim 5, characterized in that, The third part (523) includes a single segment or multiple segments that are relatively bent.

7. The electrical switch (100) according to claim 6, characterized in that, The first part (521) and the second part (522) are bent toward the same side of the third part (523), and the first part (521) and the second part (522) are each set at a preset angle with the third part (523).

8. The electrical switch (100) according to any one of claims 1 to 7, characterized in that, The electrical switch (100) includes a circuit breaker.

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