Operator and low-voltage electric appliance switch with same

Abstract

The utility model provides a manipulator and a low-voltage apparatus switch with the same, the manipulator comprises a mounting seat and a knob assembly, a torsional spring structure is arranged between the knob assembly and the mounting seat, the knob assembly comprises a driving part rotatably arranged on the mounting seat, the torsional spring structure is provided with a first tail end fixed in the mounting seat, and the first tail end is provided with a second tail end fixed in the mounting seat. The second tail end is arranged on the movement path of the driving part in an extending mode, and the driving part abuts against or is close to the second tail end when the rotary knob assembly rotates from the connection position to the disconnection position. And under an abnormal condition, the knob cannot be rotated to reach the padlock position even if the operator is driven by the maximum 3F acting force, so that the situation that safety accidents occur due to the fact that the operator is locked under the condition that the switch contact is not disconnected is avoided, an operating mechanism in the electric appliance switch main body is protected from being damaged, mistaken rotation operation is prevented, and the use safety of a product is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, and particularly relates to an operator and a low-voltage electrical switch having the same. Background Art

[0002] The low-voltage electrical switch is one of the common electrical devices in the low-voltage power distribution system, and is a device used to connect and disconnect circuits, and is widely used in people's production and life. The common low-voltage electrical switch usually includes a switch body and an operator provided on the switch body. By rotating the knob of the operator, the contacts of the low-voltage electrical switch can be connected or disconnected, thereby controlling the use of the electrical appliance. According to the requirements of IEC60947-1 and GB14048.1, when the low-voltage electrical switch works, a certain force is required to drive the operator to connect or disconnect it. This force is between F and 3F. According to the on position and off position of the operator for driving the switch contacts to close and separate, and the padlock position for locking the operator to prevent misoperation, a force of 1F is required to drive the operator to act when connecting or disconnecting, and a force of F-3F is required to drive the operator to act when moving from the off position to the padlock position. Under normal circumstances, after the contacts are disconnected, the operator should then rotate the operator from the off position to the padlock position and then lock the operator with a padlock; in abnormal circumstances, it is required that the operator cannot be rotated to the padlock position with the maximum force of 3F within a certain time. However, many existing low-voltage electrical switches do not have this function. Common low-voltage electrical switches include isolating switches. When the switch contacts are welded together and the operator is stressed, for example, the guide rail of the isolating switch is distorted, and / or the rotating shaft connecting the isolating switch and the mounting plate is distorted, and / or the plastic deformation between the rotating shaft and the mounting plate and other factors, the operator can still be rotated to the padlock position in abnormal circumstances. In this way, when the switch contacts are not disconnected, the operator is likely to lock the operator by mistake, which will also damage the operating mechanism inside the switch body. When the operator performs subsequent maintenance and other work on the equipment, there may be an electric shock risk, affecting personal safety and causing safety accidents. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies existing in the prior art, so as to provide an operator with a simple structure, which can prevent the knob from being misrotated to the padlock position when the switch contacts are not disconnected, thereby causing safety accidents, and protect the operating mechanism inside the electrical switch body from being damaged, and is safe to use, and a low-voltage electrical switch having the same.

[0004] To achieve the above purpose, the technical solution provided by the utility model is:

[0005] The present utility model provides an operator, which includes a mounting base and a knob assembly rotatably connected to the mounting base. The mounting base has a mounting cavity. During the rotation process, the knob assembly has a closed position, an open position, and a padlock position. A torsion spring structure accommodated in the mounting cavity is provided between the knob assembly and the mounting base. The knob assembly includes a driving part disposed on the mounting base and rotating with the knob assembly. The torsion spring structure has a first end fixed in the mounting base and a second end extending on the movement path of the driving part. When the knob assembly is in the closed position, the driving part is away from the second end. When the knob assembly is switched from the closed position to the open position, the driving part is driven to abut or approach the second end. And when the knob assembly is switched from the open position to the padlock position, the driving part is driven to push the second end to move.

[0006] In the above-mentioned operator, a limit bayonet is provided in the mounting base, and the first end is mounted and abutted in the limit bayonet.

[0007] In the above-mentioned operator, the knob assembly includes a knob and a rotating shaft seat fixedly connected to the knob. The rotating shaft seat is rotatably disposed in the mounting cavity, and the driving part is provided on the rotating shaft seat.

[0008] In the above-mentioned operator, the driving part includes a limit boss provided on the side wall of the rotating shaft seat and a first abutting surface formed on one side of the limit boss and cooperating with the second end.

[0009] In the above-mentioned operator, the mounting base includes a central hole through which the rotating shaft seat can penetrate and a spring groove surrounding the central hole. The torsion spring structure is accommodated in the spring groove. The rotating shaft seat penetrates through the central hole. A first limit notch communicating with the central hole is provided on the inner peripheral groove wall of the spring groove adjacent to the central hole. A limit bayonet is provided on the outer peripheral groove wall of the spring groove. The second end passes through the first limit notch and extends towards the central hole to cooperate with the limit boss.

[0010] When the torsion spring structure is installed in the spring groove, the second end is driven to be cooperatively limited at one end of the first limit notch.

[0011] In the above-mentioned operator, at least one first padlock hole is formed on the side wall of the knob. An annular flange is formed around the central hole at the top of the mounting base. At least one second padlock hole is provided on the annular flange. When the knob rotates to the padlock position, the first padlock hole is driven to communicate with the first padlock hole correspondingly.

[0012] In the above-mentioned operator, the knob assembly includes a knob, a knob base detachably connected to the knob, and a rotating shaft base fixed to the bottom of the knob base. The knob base and the rotating shaft base are rotatably inserted into the installation cavity. One end of the knob base is provided with a driving part for cooperating with the second end.

[0013] In the above-mentioned operator, the mounting base includes a panel and an installation cavity formed between the mounting base and the panel. The installation cavity includes a central hole for the rotating shaft base to penetrate and a spring groove surrounding the periphery of the central hole. The central hole includes a socket end provided on the panel and a second limiting notch provided on the side wall of the socket end. The knob base is rotatably connected to the panel. The torsion spring structure is accommodated in the spring groove and is located below the knob base. The driving part includes a second abutting surface provided on the side wall of one end of the knob base. The second end extends vertically through the second limiting notch and cooperates with the second abutting surface. A limiting bayonet is provided on one side wall of the spring groove.

[0014] In the above-mentioned operator, a locking plate is hinged on the knob base. The knob is sleeved on the knob base, and an operation opening for the locking plate to extend out is provided at the top of the knob.

[0015] The utility model also provides a low-voltage electrical switch, including an operator as described in any one of the above.

[0016] The technical solution of the utility model has the following advantages compared with the prior art:

[0017] 1. In the operator provided by the utility model, a torsion spring structure is arranged between the knob assembly and the mounting base. The first end of the torsion spring structure is fixed in the mounting base, and its second end extends along the movement path of the driving part. With this structural arrangement, the knob assembly moves between the on position and the off position with an operating force of 1F. When the knob assembly reaches the off position, it will drive the driving part to abut against or be close to the second end. When the knob assembly moves from the off position to the padlock position, it needs to overcome the torsion spring force and act with an operating force of F - 3F. The benefits of adopting this technical solution are that under normal circumstances, the operator meets the requirement of 1F operating force to turn on and off the low-voltage electrical switch. However, in abnormal situations, since the resultant force of the torsion spring force, the acting force inside the switch body, and the abnormal force is greater than 3F, the operator cannot be rotated to the padlock position with a maximum acting force of 3F. In addition, the torsion spring force shares part of the acting force on the switch body, protecting the switch body, avoiding damage to the operating mechanism inside the switch body, and also preventing the situation of locking the operator when the switch contacts are not disconnected, thus preventing misrotation operation and improving the safety of product use.

[0018] 2. In the operator provided by the utility model, the knob assembly is composed of a knob and a shaft seat, the shaft seat is penetrated by the center hole of the mounting seat, the driving part includes a limiting boss arranged on the side wall of the shaft seat, one side of the limiting boss is formed with a first abutment surface with the second end, the first end of the torsion spring structure is fixed in the limiting bayonet of the mounting seat, and the second end thereof extends toward the center hole and is located on the path where the limiting boss rotates with the shaft seat, when the knob is rotated to the disconnected position, it just drives the limiting boss to abut against the second end, at this time, the shaft seat and the knob are limited by the torsion spring in the disconnected position, under abnormal circumstances, according to the design requirements, when the combined force of the torsion spring force, the force inside the switch body and the abnormal force is greater than 3F, the knob assembly cannot be rotated from the disconnected position to the padlocked position, thereby avoiding the knob from being rotated to the padlocked position by mistake under abnormal circumstances to cause a safety accident, and ensuring that the operator is safely operated in accordance with the specifications.

[0019] 3. In the operator provided by the utility model, according to the torsion spring structure accommodated in the spring groove, a first limiting groove connected to the center hole is provided on the inner circumferential groove wall adjacent to the center hole of the spring groove, and the second end of the torsion spring structure is passed through the first limiting groove and is located in the rotation path of the driving part, so that when the knob is linked to the rotating shaft seat to rotate to the disconnected position, the limiting boss is driven to cooperate with the second end, and the rotation of the knob is restricted by the action force of the torsion spring. If the knob is rotated under force, the second end will be pushed during the movement from the disconnected position to the padlocked position, so that the torsion spring is deformed under force. When the external force on the knob is removed, the action force of the torsion spring can push the rotating shaft seat and the knob back to the disconnected position. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a schematic diagram of the structure of the operator in Example 1 provided by the utility model;

[0022] Figure 2 It is a schematic diagram of the split structure of the operator in Example 1;

[0023] Figure 3 for Figure 2 A schematic diagram of the structure of the mounting base shown in ;

[0024] Figure 4 for Figure 2 A schematic diagram of the structure of the knob assembly shown in ;

[0025] Figure 5 Schematic cross-sectional structure diagram of the manipulator in Embodiment 1;

[0026] Figure 6 Schematic structure diagram of the manipulator in Embodiment 2 provided by the present utility model;

[0027] Figure 7 Schematic split structure diagram of the manipulator in Embodiment 2;

[0028] Figure 8 For Figure 7 Schematic structure diagram of the knob assembly shown in;

[0029] Figure 9 For Figure 7 Schematic installation structure diagram of the torsion spring structure shown in;

[0030] Figure 10 Schematic cross-sectional structure diagram of the manipulator in Embodiment 2;

[0031] Figure 11 Schematic operation diagram of the manipulator in the on, off, and padlock positions.

[0032] Explanation of reference numerals: 1, mounting base; 10, panel; 11, central hole; 12, spring groove; 13, first limiting notch; 14, first limiting notch; 15, lock nut; 2, torsion spring structure; 21, first end; 22, second end; 3, knob; 31, first padlock hole; 4, rotating shaft seat; 5, knob seat; 6, lock plate; 7, limiting bayonet; 8, driving part; 81, limiting boss; 82, first abutting surface; 83, second abutting surface; 9, annular flange; 91, second padlock hole; a, knob assembly. Detailed implementation manners

[0033] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0034] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0035] Embodiment 1

[0036] The following further describes the specific setting method of the embodiment with reference to the accompanying drawings:

[0037] This embodiment provides an operator as shown in Figures 1 - 11 , including a mounting base 1 and a knob assembly a rotatably connected to the mounting base 1. The mounting base 1 has a mounting cavity. The knob assembly a has a closed position, an open position, and a padlock position during rotation. When the knob assembly a is in the closed position and the open position, it drives the contacts of the low-voltage electrical switch to be turned on and off, and when in the padlock position, the padlock locking of the knob assembly is realized. Among them, a torsion spring structure 2 accommodated in the mounting cavity is provided between the knob assembly a and the mounting base 1. The knob assembly a includes a driving part 8 provided on the mounting base and rotating with the knob assembly. The torsion spring structure 2 has a first end 21 fixed in the mounting base 1 and a second end 22 extending on the movement path of the driving part 8. When the knob assembly a is in the closed position, it drives the driving part away from the second end. When the knob assembly a is switched from the closed position to the open position, it drives the driving part 8 to abut against or be close to the second end. Thus, it can be seen that the knob assembly a is switched between the closed position and the open position with an operating force F, and the second end does not exert a force on the knob assembly. Only when the knob assembly a is switched from the open position to the padlock position, the knob assembly a drives the driving part 8 to drive the second end 22 to move with an operating force of F to 3F, causing the torsion spring to be deformed. Therefore, when unlocking or releasing the knob assembly in the padlock position, under the action of the elastic restoring force of the second end, the knob assembly is driven to reset to the open position.

[0038] The above content is the core technical solution of the present utility model. By providing a torsion spring structure 2 between the knob assembly a and the mounting base 1, the first end 21 of the torsion spring structure 2 is fixed inside the mounting base 1, and its second end 22 extends along the movement path of the driving part 8. With this structural arrangement, the knob assembly acts between the on position and the off position with an operating force of 1F. When the knob assembly reaches the off position, it drives the driving part to abut or be close to the second end. When the knob assembly moves from the off position to the padlock position, it needs to overcome the torsion spring force and act with an operating force of F - 3F. The advantage of adopting this technical solution is that under normal circumstances, the operator can turn on and off the low-voltage electrical switch with an operating force of 1F. However, in abnormal situations, since the resultant force of the torsion spring force, the internal force of the switch body, and the abnormal force is greater than 3F, the operator cannot be driven to rotate to the padlock position even with a maximum operating force of 3F. In addition, the torsion spring force shares part of the force acting on the switch body, protecting the switch body and preventing damage to the operating mechanism inside the switch body. At the same time, it also avoids the situation of locking the operator when the switch contacts are not disconnected, preventing accidental rotation operation and improving the safety of product use.

[0039] The following will Figures 2 - 5 describe in detail the specific setting methods of the knob assembly and the torsion spring structure:

[0040] The knob assembly a includes a knob 3 and a rotating shaft seat 4 fixedly connected to the knob 3. The rotating shaft seat 4 is rotatably disposed through the installation cavity. The driving portion 8 is provided on the rotating shaft seat 4. Specifically, the driving portion 8 includes a limiting boss 81 provided on the side wall of the rotating shaft seat 4, and a first abutting surface 82 formed on one side of the limiting boss 81 and cooperating with the second end 22. Further preferably, the mounting seat 1 includes a central hole 11 through which the rotating shaft seat 4 can penetrate and a spring groove 12 provided around the central hole 11. The spring groove 12 and the central hole 11 are part of the installation cavity. A locking nut 15 is provided at the bottom of the mounting seat 1. The torsion spring structure 2 is received in the spring groove 12. The rotating shaft seat 4 penetrates through the central hole 11. A limiting bayonet 7 is provided inside the mounting seat 1. Specifically, the limiting bayonet 7 is provided on the outer peripheral groove wall of the spring groove 12. The first end 21 of the mounting is installed and abutted in the limiting bayonet 7. The limiting bayonet 7 plays a role in limiting the installation of the first end 21 of the torsion spring structure 2. The second end 22 extends into the central hole 11 and is located on the movement path of the driving portion 8. The advantage of such a design is that when the knob 3 is rotated to the off position, it just drives the limiting boss 81 to abut against the second end 22. At this time, the rotating shaft seat 4 together with the knob 3 is limited by the torsion spring at the off position. In case of an abnormality, according to the design requirements, when the resultant force of the torsion spring force, the internal force of the switch body and the abnormal force is greater than 3F, the knob assembly cannot be rotated from the off position to the padlock position, thus avoiding the knob being accidentally rotated to the padlock position in case of an abnormality and causing a safety accident, ensuring that the operator operates safely according to the specifications. In addition, when the knob 3 is rotated in the reverse direction and switched from the off position to the on position, the limiting boss 81 moves away from the second end 22 during the rotation of the knob 3, so it is not affected by the torsion spring force, thus ensuring the normal on-off operation of the low-voltage electrical switch.

[0041] Combined with Figure 3 and Figure 5As shown, a first limiting slot 13 connected to the center hole is provided on the inner circumferential slot wall of the spring slot 12 adjacent to the center hole 11, and a limiting snap-in 7 is provided on the outer circumferential slot wall of the spring slot 12. The second end 22 passes through the first limiting slot and extends toward the center hole 11 to cooperate with the limiting boss 81. The first limiting slot is in an arc shape and is set according to the installation position of the second end in the first limiting slot. When the knob is switched between the on position and the off position, the second end is limited to one end of the first limiting slot. At this time, the driving part is not subjected to the force of the torsion spring. When the knob is rotated from the off position to the padlock position, the second end is pushed by the driving part to elastically move and is limited by the other end of the first limiting slot, thereby limiting the second end 22 through the first limiting slot. The advantage of this design is that when the knob 3 is linked with the shaft seat to rotate to the disconnected position, the limit boss is driven to cooperate with or approach the second end 22, and the knob 3 is rotated between the disconnected position and the padlocked position with an operating force of F to 3F under the support of the torsion spring force. If the knob is rotated under force, the second end will be pushed during the movement from the disconnected position to the padlocked position, causing the torsion spring to deform under force. After the external force on the knob is removed, the torsion spring force can be used to push the shaft seat and the knob back to the disconnected position. In abnormal circumstances, even with the maximum 3F force, the knob 3 cannot be driven to the padlocked position, preventing the knob 3 of the operator from being accidentally rotated to the padlocked position.

[0042] In order to prevent the operator from being accidentally operated in the open state, at least one first padlock hole 31 is provided on the side wall of the knob 3, and an annular flange 9 is formed around the center hole 11 on the top of the mounting base 1, and at least one second padlock hole 91 is provided on the annular flange 9. When the knob 3 is rotated to the padlock position, the first padlock hole 31 is driven to be connected with the first padlock hole 31 accordingly, and the knob 3 is locked in the padlock position by the padlock member passing through the first padlock hole 31 and the first padlock hole 31 to prevent the knob from being accidentally operated, so as to prevent the low-voltage electrical switch from being accidentally closed when in the disconnected state.

[0043] Example 2

[0044] This embodiment provides Figures 6 - 11An operator as shown. The main difference between this operator and that in Embodiment 1 lies in: the cooperation mode and setting structure among the knob assembly a, the driving part 8 and the torsion spring structure 2 are different. The specific setting mode is as follows: The knob assembly a includes a knob 3, a knob base 5 detachably connected to the knob 3, and a rotating shaft base 4 fixed to the bottom of the knob base 5. The knob base 5 and the rotating shaft base 4 are rotatably inserted into the installation cavity. One end of the knob base 5 is provided with a driving part 8 cooperating with the second end 22, and a lock plate 6 rotatably extending out of the knob 3 is arranged on the knob base 5. When the knob 3 rotates to the padlock position, the position of the knob is locked by pulling out the lock plate 6; Further preferably, the mounting base 1 includes a panel 10 and an installation cavity formed between the mounting base 1 and the panel 10. A locking nut 15 is provided at the bottom of the mounting base 1. The installation cavity includes a central hole 11 for the rotating shaft base 4 to penetrate into and a spring groove 12 arranged around the periphery of the central hole 11. The central hole 11 includes a socket end provided on the panel and a second limiting notch 14 provided on the side wall of the socket end. The second limiting notch is in an arc shape. The rotating shaft base 4 is inserted into the central hole from the socket end position. The knob base 5 is rotatably connected to the panel 10. The torsion spring structure 2 is accommodated in the spring groove 12 and is located below the knob base. The driving part 8 includes a second abutting surface 83 provided on one side wall of the knob base 5. The second end 22 extends vertically through the second limiting notch 14 to cooperate with the second abutting surface 83, that is, the second end 22 is exactly located on the movement path of the second abutting surface. A limiting bayonet 7 is provided on one side wall of the spring groove 12, specifically, the limiting bayonet 7 is provided on the outer peripheral wall of the spring groove 12. It can be seen from the above structure that the knob assembly a is composed of a knob 3, a knob base 5, a rotating shaft base 4 and a lock plate 6. The first end 21 of the torsion spring structure 2 is fixed in the limiting bayonet 7 of the mounting base 1, and its second end 22 extends vertically and is located on the movement path of the second abutting surface 83. The knob assembly a designed in this way is matched by the second abutting surface of the knob base and the second end 22 of the torsion spring. Refer to Figure 11 , specifically, when the knob 3 rotates to the off position, it drives the second abutting surface 83 to abut against or approach the second end. Under normal circumstances, the knob 3 is switched on and off with an operating force F between the on position and the off position, and is driven with an operating force of F to 3F between the off position and the padlock position; while in abnormal circumstances, the knob 3 cannot be driven from the off position to the padlock position with a maximum operating force of 3F, because the resultant force of the torsion spring force, the force inside the switch body and the abnormal force is greater than 3F, so as to prevent the knob from accidentally rotating to the padlock position in abnormal circumstances and causing safety accidents. Those skilled in the art can make a choice on the setting mode of the knob assembly and the driving part according to the above description, and other equivalent embodiments will not be elaborated one by one here.

[0045] The padlocking method of this knob assembly a is different from that of the knob assembly a in Embodiment 1. Refer to Figure 6 and Figure 8 , a lock plate 6 is hinged on the knob base 5. The knob 3 is sleeved on the knob base 5, and an operation opening for the lock plate to extend out is provided at the top of the knob 3. When the knob 3 is rotated to the padlocking position, as long as the lock plate 6 is pulled out from the operation opening at the top of the knob, and then the lock plate 6 is locked by a padlocking member, the knob can be locked in the padlocking position to prevent misoperation, thereby preventing the low-voltage electrical switch from being misoperated and closed when in the off state.

[0046] Embodiment 3

[0047] This embodiment provides a low-voltage electrical switch, including the operator described in the above Embodiment 1 and Embodiment 2. This low-voltage electrical switch is preferably an isolating switch, and the isolating switch is connected to the operator through a transmission assembly. The low-voltage electrical switch in the above embodiment is provided with the operator as described above, so it naturally has all the advantages brought by the setting of the above operator. When the operator rotates the knob 3 to the on position, it drives the contacts of the isolating switch to close, realizing the closing operation of the isolating switch. When the operator rotates the knob 3 to the off position, it drives the contacts of the isolating switch to open, realizing the opening operation of the isolating switch. Then, the knob 3 is further driven until the padlocking position, and at this time, the knob 3 is locked in the padlocking position by a padlocking member, thereby locking the isolating switch in the off state to avoid misclosing operation, and ensuring the safety of the operator for subsequent maintenance and other work on the equipment and lines.

[0048] Obviously, the above embodiments are only examples given for clear illustration, and are not limitations on the embodiments. For those of ordinary skill in the art, other different forms of changes or variations can be made on the basis of the above description. It is not necessary and impossible to enumerate all the embodiments here. And the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. An operator, comprising a mounting base (1) and a knob assembly (a) rotatably connected to the mounting base (1), the mounting base (1) having a mounting cavity, the knob assembly (a) having a closed position, an open position and a padlock position during rotation, characterized in that: A torsion spring structure (2) is provided between the knob assembly (a) and the mounting base (1) and is received in the mounting cavity. The knob assembly (a) includes a driving portion (8) provided on the mounting base and rotating with the knob assembly. The torsion spring structure (2) has a first end (21) fixed within the mounting base (1) and a second end (22) extending along the movement path of the driving portion (8). When the knob assembly (a) is switched from the on position to the off position, the driving portion (8) is brought into contact with or close to the second end (22), and when the knob assembly (a) is switched from the off position to the padlock position, the driving portion (8) is driven to push the second end (22) to move.

2. The manipulator according to claim 1, wherein: A limiting bayonet (7) is provided within the mounting base (1), and the first end (21) is mounted and clamped within the limiting bayonet (7).

3. An operator according to claim 1 or 2, characterized in that: The knob assembly (a) includes a knob (3) and a shaft seat (4) fixedly connected to the knob (3). The shaft seat (4) is rotatably inserted into the mounting cavity, and the driving portion (8) is provided on the shaft seat (4).

4. The manipulator according to claim 3, characterized in that: The driving portion (8) includes a limiting boss (81) provided on the side wall of the shaft seat (4) and a first abutting surface (82) formed on one side of the limiting boss (81) and cooperating with the second end (22).

5. An operator according to claim 4, characterized in that: The mounting base (1) includes a central hole (11) through which the shaft seat (4) can be inserted and a spring groove (12) provided around the central hole (11). The torsion spring structure (2) is received in the spring groove (12). The shaft seat (4) is inserted through the central hole (11). A first limiting notch (13) communicating with the central hole is provided on the inner peripheral groove wall of the spring groove (12) adjacent to the central hole. A limiting bayonet (7) is provided on the outer peripheral groove wall of the spring groove (12). The second end (22) passes through the first limiting notch and extends towards the central hole (11) to cooperate with the limiting boss (81).

6. An operator according to claim 3, characterized in that: At least one first padlock hole (31) is formed on the side wall of the knob (3). An annular flange (9) is formed around the central hole (11) at the top of the mounting base (1). At least one second padlock hole (91) is provided on the annular flange (9). When the knob (3) rotates to the padlock position, the first padlock hole (31) is driven to communicate with the second padlock hole (91).

7. An operator according to claim 1 or 2, characterized in that: The knob assembly (a) includes a knob (3) and a knob base (5) detachably connected to the knob (3), and a shaft seat (4) fixed to the bottom of the knob base (5). The knob base (5) and the shaft seat (4) are rotatably connected to the mounting base (1), and a driving portion (8) cooperating with the second end (22) is provided at one end of the knob base (5).

8. An operator according to claim 7, characterized in that: The mounting base (1) includes a panel (10) and a mounting cavity formed between the mounting base (1) and the panel (10). The mounting cavity includes a central hole (11) through which the rotating shaft seat (4) can penetrate and a spring groove (12) disposed around the periphery of the central hole (11). The central hole (11) includes a socket end provided on the panel and a second limiting notch (14) provided on the side wall of the socket end. The knob seat (5) is rotatably connected to the panel (10). The torsion spring structure (2) is received in the spring groove (12) and is located below the knob seat. The driving portion (8) includes a second abutting surface (83) provided on one end side wall of the knob seat (5). The second end (22) extends vertically through the second limiting notch (14) and cooperates with the second abutting surface (83). A limiting bayonet (7) is provided on one side wall of the spring groove (12).

9. An operator according to claim 8, characterized in that: A lock plate (6) is hinged to the knob seat (5). The knob (3) is sleeved on the knob seat (5), and an operation opening through which the lock plate (6) can extend is provided at the top of the knob (3).

10. A low-voltage electrical switch, characterized in that, An operator according to any one of claims 1-9 is included.

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