A changeover switch

Abstract

The application provides a change-over switch, relates to the technical field of switches, and is used for overcoming the defect that the change-over switch in the prior art is difficult to avoid misoperation during maintenance. The change-over switch comprises a shell, an operating handle and a locking piece. The shell is provided with a first extension part and a second extension part. The first extension part is provided with a first through hole, and the second extension part is provided with a second through hole. The operating handle is rotationally arranged on the shell. A first end of the operating handle extends out of the shell. The first end is located between the first extension part and the second extension part. The first end is provided with a third through hole. The operating handle has an open position and a closed position relative to the shell. When the operating handle is in the open position, one end of the locking piece sequentially passes through the first through hole, the third through hole and the second through hole, so as to prevent the operating handle from being switched from the open position to the closed position.

Description

Technical Field

[0001] This application relates to the field of switch technology, specifically to a changeover switch. Background Technology

[0002] The transfer switch has two lines: a primary power supply and a backup power supply. Under normal circumstances, the transfer switch supplies power to the equipment through the primary power supply. When the primary power supply fails or is interrupted due to power maintenance, it switches to the backup power supply to power the equipment. This ensures that the equipment can continue to operate normally even if the primary power supply fails.

[0003] To ensure the safe and reliable operation of electrical equipment, maintenance personnel need to inspect and maintain the power supply system regularly or irregularly. During this time, a reliable power disconnection switch is required. However, if unsuspecting personnel accidentally reconnect the power while maintenance or repair work is underway, other unsuspecting staff may mistakenly reconnect the power, posing a significant safety hazard.

[0004] Therefore, a changeover switch is urgently needed to avoid the above situation from occurring. Utility Model Content

[0005] This application provides a changeover switch to overcome the shortcomings of existing changeover switches, which are prone to misoperation during maintenance.

[0006] To achieve the above objectives, this application provides a changeover switch, including a housing, an operating handle, and a locking member. The housing has a first extension and a second extension. The first extension has a first through hole, and the second extension has a second through hole. The operating handle is rotatably mounted on the housing. A first end of the operating handle extends outside the housing, located between the first and second extensions. The first end has a third through hole. The operating handle has an open position and an closed position relative to the housing. When the operating handle is in the open position, one end of the locking member passes sequentially through the first through hole, the third through hole, and the second through hole to prevent the operating handle from switching from the open position to the closed position.

[0007] When the above technical solution is adopted, the operating handle is rotatably mounted on the housing, and the operating handle has an open position and a closed position relative to the housing. When the operating handle rotates relative to the housing, it switches between the open and closed positions. Furthermore, this allows the changeover switch to switch between an open state and a closed state.

[0008] When the operating handle is in the open position, the changeover switch is in the off position. At this time, the current in the circuit containing the changeover switch is interrupted. Maintenance personnel can then inspect and repair the power supply system.

[0009] The first end of the operating handle extends outside the housing so that the operator can directly contact the operating handle and operate it to switch the operating handle between the open and closed positions.

[0010] When the operating handle is in the open position, one end of the locking member passes through the first through hole, the third through hole and the second through hole in sequence to prevent the operating handle from switching from the open position to the closed position.

[0011] Thus, when the operating handle is in the open position, the locking mechanism prevents the handle from switching from the open to the closed position, ensuring the handle remains in the open position and cannot be switched to the closed position. This ensures the safety of maintenance personnel when performing maintenance on the power supply system. Simultaneously, it alerts other unsuspecting personnel, preventing accidental operation of the operating handle, reducing the likelihood of accidents, guaranteeing the personal safety of maintenance personnel, and avoiding unnecessary economic losses.

[0012] In one possible implementation, the changeover switch further includes a mode switching handle rotatably mounted on the housing. A second end of the mode switching handle extends outside the housing. The mode switching handle has a manual position and an automatic position relative to the housing. A third extension is also provided on the housing, and a fourth through hole is formed in the third extension. The second end is located between the third extension and the first extension. When the mode switching handle is in the manual position and the operating handle is in the open position, one end of the locking member passes sequentially through the fourth through hole, the first through hole, the third through hole, and the second through hole. Furthermore, the extension path of the locking member between the third extension and the first extension intersects the rotation path of the mode switching handle as it switches from the manual position to the automatic position.

[0013] When the above technical solution is adopted, the mode switching handle switches between manual and automatic positions when it rotates relative to the housing.

[0014] The second end of the mode switching handle extends outside the housing so that the operator can directly contact the mode switching handle and operate it to switch between manual and automatic positions.

[0015] When the mode switching handle is in the manual position and the operating handle is in the open position, one end of the locking member passes through the fourth through hole, the first through hole, the third through hole and the second through hole in sequence. This not only keeps the position of the operating handle relative to the first extension and the second extension unchanged, but also keeps the position of the operating handle relative to the housing stationary, so that the operating handle is always in the open position and cannot be switched to the closed position.

[0016] Furthermore, the extension path of the locking member between the third extension and the first extension intersects with the rotation path of the mode switching handle from the manual position to the automatic position. The locking member can prevent the mode switching handle from switching from the manual position to the automatic position, so that the mode switching handle is always in the manual position and cannot be switched to the automatic position.

[0017] At this time, it can be ensured that the transfer switch is in the double-open state, allowing maintenance personnel to inspect the power supply system and ensuring their safety during maintenance. Simultaneously, it alerts other unsuspecting personnel, preventing them from accidentally operating the mode switch handle or other control handles, reducing the likelihood of accidents, ensuring the personal safety of maintenance personnel, and avoiding unnecessary economic losses.

[0018] In one possible implementation, the changeover switch further includes a mode switching handle, rotatably mounted on the housing. A second end of the mode switching handle extends outside the housing. A fifth through hole is formed on the second end. The mode switching handle has a manual position and an automatic position relative to the housing. A third extension is also provided on the housing, and a fourth through hole is formed on the third extension. The second end is located between the third extension and the first extension. When the mode switching handle is in the manual position and the operating handle is in the open position, one end of the locking member passes sequentially through the fourth through hole, the fifth through hole, the first through hole, the third through hole, and the second through hole.

[0019] When the above technical solution is adopted, with the mode switching handle in the manual position and the operating handle in the open position, one end of the locking member passes through the fourth through hole, the fifth through hole, the first through hole, the third through hole, and the second through hole in sequence. At this time, not only can the position of the operating handle relative to the first extension and the second extension remain unchanged, but the position of the operating handle relative to the housing can also be kept stationary, so that the operating handle is always in the open position and cannot be switched to the closed position.

[0020] Furthermore, the locking member passes through the fifth through hole and can limit the mode switching handle, so that the position of the mode switching handle relative to the third extension and the first extension remains unchanged, that is, the position of the mode switching handle relative to the housing remains unchanged, so that the mode switching handle is always in the manual position and cannot be switched to the automatic position.

[0021] At this time, it can be ensured that the transfer switch is in the double-open state, allowing maintenance personnel to inspect the power supply system and ensuring their safety during maintenance. Simultaneously, it can alert other unsuspecting personnel, preventing them from accidentally operating the mode switch handle or other control handles, reducing the likelihood of accidents, ensuring the personal safety of maintenance personnel, and avoiding unnecessary economic losses.

[0022] In one possible implementation, the locking element includes a lead seal wire and a lead seal block, with one end of the lead seal wire disposed on the lead seal block. When the mode switching handle is in the manual position and the operating handle is in the open position, the other end of the lead seal wire passes sequentially through the fourth through hole, the first through hole, the third through hole, and the second through hole before coupling with the lead seal block, thus keeping the lead seal wire in a taut state.

[0023] When using the above technical solution, because the lead seal is taut, it ensures that the operating handle remains stationary relative to the housing, meaning the operating handle can always be in the open position. When other unsuspecting personnel turn the operating handle, the lead seal will exert a force on the operating handle, bringing it closer to the open position. This prevents the operating handle from turning, keeping it permanently in the open position and preventing it from being switched to the closed position.

[0024] Meanwhile, because the lead seal is taut, it can block the mode switching handle when other unsuspecting staff accidentally operate it, thus preventing the handle from switching from the manual to the automatic position.

[0025] This ensures that the transfer switch is in a dual-open state, guaranteeing the safety of maintenance personnel when inspecting the power supply system.

[0026] In one possible implementation, the locking element includes a metal wire. When the mode switching handle is in the manual position and the operating handle is in the open position, one end of the metal wire passes through the fourth through hole, the first through hole, the third through hole and the second through hole in sequence and is coupled to the other end of the metal wire, so that the metal wire is in a taut state.

[0027] When using the above technical solution, because the metal wire is taut, it ensures that the operating handle remains stationary relative to the housing, meaning the operating handle can always be in the open position. When other unsuspecting personnel turn the operating handle, the metal wire applies a force to the operating handle, pushing it closer to the open position. This prevents the operating handle from turning, keeping it in the open position and preventing it from switching to the closed position.

[0028] At the same time, since the metal wire is taut, it can block the mode switching handle when other unsuspecting staff accidentally operate it, thus preventing the handle from switching from the manual to the automatic position.

[0029] This ensures that the transfer switch is in a dual-open state, guaranteeing the safety of maintenance personnel when inspecting the power supply system.

[0030] Furthermore, in actual operation, the locking element can be set as lead sealing wire or metal wire, which enriches the types of locking elements and makes it easier to select and set them according to the actual situation.

[0031] In one possible implementation, when the operating handle is in the open position, the axes of the first through hole, the second through hole, the third through hole, and the fourth through hole coincide. The locking element includes a rigid rod, one end of which passes sequentially through the fourth through hole, the first through hole, the third through hole, and the second through hole.

[0032] When the above technical solution is adopted, the rigid rod is not easily deformed. One end of the rigid rod passes through the fourth through hole, the first through hole, the third through hole, and the second through hole in sequence, which allows the operating handle to remain stationary relative to the housing, meaning the operating handle can always be in the open position. When other unsuspecting personnel turn the operating handle, the rigid rod will exert a force on the operating handle to move it closer to the open position. This prevents the operating handle from turning, keeping it in the open position and preventing it from being switched to the closed position.

[0033] Meanwhile, since the rigid rod is not easily deformed, it can block the mode switching handle when other unsuspecting staff accidentally operate it, thus preventing the mode switching handle from switching from the manual position to the automatic position.

[0034] In one possible implementation, the first through hole is a circular hole, a rectangular hole, or a triangular hole. The second through hole is a circular hole, a rectangular hole, or a triangular hole. The third through hole is a circular hole, a rectangular hole, or a triangular hole.

[0035] When the above technical solution is adopted, the structural types of the first through hole, the second through hole, and the third through hole are enriched, making it easier to select and set them according to the actual situation.

[0036] In one possible implementation, both the first extension and the second extension are integrally formed with the shell.

[0037] In one possible implementation, the third extension is integrally formed with the housing.

[0038] At this point, the shell is a one-piece structure, which not only avoids stress concentration problems caused by bolts or welding, but also ensures higher dimensional accuracy and consistency, and improves the structural strength of the shell. Moreover, there is no need to machine the shell, reducing material usage and avoiding material waste.

[0039] Furthermore, the integrated structure reduces connection points, lowering the risk of failure due to loose connections, corrosion, or fatigue, and improving fatigue resistance. Additionally, it reduces the number of parts and assembly steps for the housing, simplifying the operation process.

[0040] In one possible implementation, the fifth through hole is a circular hole, a rectangular hole, or a triangular hole.

[0041] The above technical solution enriches the structural types of the fifth through hole, making it easier to select and set according to actual conditions. Attached Figure Description

[0042] Figure 1 A schematic diagram of the structure of a changeover switch provided in an embodiment of this application. Figure 1 .

[0043] Figure 2 A schematic diagram of the structure of a changeover switch provided in an embodiment of this application. Figure 2 .

[0044] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.

[0045] Figure 4 This is a partial structural diagram of the changeover switch provided in an embodiment of this application.

[0046] Figure 5 for Figure 4 A magnified view of a portion of point B in the middle.

[0047] Explanation of reference numerals in the attached figures: 1-Housing, 2-First extension, 21-First through hole, 3-Second extension, 31-Second through hole, 4-Operating handle 5-Locking part, 51-Lead seal line, 52-Lead seal block, 6-Mode switching handle, 7-Third extension, 71-Fourth through hole. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims and drawings of this application are intended to cover non-exclusive inclusion.

[0050] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0051] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. For example, in the description of this application, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0052] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0053] In the description of this application, unless otherwise stated, "multiple" means two or more (including two), and similarly, "multiple groups" means two or more (including two groups).

[0054] Please refer to Figures 1 to 3 As shown in the figure, this application embodiment provides a changeover switch, which includes a housing 1, an operating handle 4, and a locking member 5.

[0055] The specific structure and dimensions of the housing 1 are not specifically limited here. The housing 1 may be made of insulating materials such as polycarbonate; however, this is only an example and not a specific limitation.

[0056] The housing 1 is provided with a first extension 2 and a second extension 3. In a specific implementation, both the first extension 2 and the second extension 3 are located on the outer wall of the housing 1. The first extension 2 is located near the second extension 3. The structures of the first extension 2 and the second extension 3 can be the same, and the first extension 2 and the second extension 3 can be arranged opposite to each other.

[0057] The first extension 2 is fixed relative to the housing 1. The manner in which the first extension 2 is disposed on the housing 1 is not limited here. For example, the first extension 2 can be fixedly disposed on the housing 1 by means of welding, snap-fitting, or screw connection.

[0058] Accordingly, the second extension 3 is fixed relative to the housing 1, and the manner in which the second extension 3 is disposed on the housing 1 is not limited here. For example, the second extension 3 can be fixedly disposed on the housing 1 by means of welding, snap-fitting, or screw connection.

[0059] like Figure 4 and Figure 5 As shown, a first through hole 21 is provided on the first extension 2. The structure and size of the first through hole 21 are not specifically limited here. The axis of the first through hole 21 can extend along the rotation axis of the operating handle 4.

[0060] The second extension 3 has a second through hole 31. The structure and size of the second through hole 31 are not specifically limited here. The axis of the second through hole 31 can extend along the rotation axis of the operating handle 4.

[0061] In practice, the axis of the first through hole 21 can coincide with the axis of the second through hole 31. Of course, the axis of the first through hole 21 can also be offset from the axis of the second through hole 31.

[0062] The operating handle 4 is rotatably mounted on the housing 1, and has an open position and an closed position relative to the housing 1. When the operating handle 4 rotates relative to the housing 1, it switches between the open and closed positions. Furthermore, this allows the changeover switch to switch between an open state and a closed state.

[0063] When operating handle 4 is in the open position, the changeover switch is in the off position. At this time, the current in the circuit containing the changeover switch is interrupted. Maintenance personnel can then inspect and repair the power supply system.

[0064] The first end of the operating handle 4 extends outside the housing 1 so that the operator can directly contact the operating handle 4 and operate the operating handle 4 to switch the operating handle 4 between the open position and the closed position.

[0065] The first end is located between the first extension 2 and the second extension 3. A third through hole is provided at the first end. The structure and size of the third through hole are not specifically limited here. The axis of the third through hole can extend along the rotation axis of the operating handle 4.

[0066] In practice, the axes of the first through hole 21, the second through hole 31, and the third through hole can coincide. Of course, the axes of the first through hole 21, the second through hole 31, and the third through hole can also coincide in pairs, or all of them can be staggered.

[0067] When the operating handle 4 is in the open position, one end of the locking member 5 passes through the first through hole 21, the third through hole and the second through hole 31 in sequence to prevent the operating handle 4 from switching from the open position to the closed position.

[0068] Thus, when the operating handle 4 is in the open position, the locking element 5 prevents the operating handle 4 from switching from the open position to the closed position, ensuring that the operating handle 4 remains in the open position and cannot be switched to the closed position. This ensures the safety of maintenance personnel when performing maintenance on the power supply system and facilitates maintenance. At the same time, it alerts other unsuspecting personnel, preventing them from accidentally operating the operating handle 4, reducing the probability of safety accidents, ensuring the personal safety of maintenance personnel, and avoiding unnecessary economic losses.

[0069] In practice, after the locking member 5 passes through the first through hole 21, the third through hole and the second through hole 31 in sequence, the position of the operating handle 4 relative to the first extension 2 and the second extension 3 remains unchanged, so that the position of the operating handle 4 relative to the housing 1 remains unchanged, and the operating handle 4 is always in the open position.

[0070] Additionally, it should be noted that the changeover switch provided in this application embodiment, in order to lock the operating handle 4 in the open position, only requires a first extension 2 with a first through hole 21 and a second extension 3 with a second through hole 31 to be provided on the housing 1, and the locking member 5 to pass through the first through hole 21, the third through hole and the second through hole 31 in sequence. This structure is relatively simple and easy to operate.

[0071] In one possible implementation, please combine Figures 1 to 3 As shown, the switch provided in this embodiment of the application also includes a mode switching handle 6, which is rotatably disposed on the housing 1. The mode switching handle 6 has a manual position and an automatic position relative to the housing 1.

[0072] When the mode switching handle 6 rotates relative to the housing 1, the mode switching handle 6 switches between manual and automatic positions.

[0073] It should be noted that transfer switches generally have the following three operating states: main power supply state, backup power supply state, and dual-mode state.

[0074] The main operating modes of the changeover switch are manual operation mode, automatic operation mode, and remote operation mode.

[0075] When the mode switching handle 6 is in the manual position, the changeover switch is in manual operation mode. At this time, the operator can rotate the operating handle 4 relative to the housing 1 to switch between the open and closed positions. Furthermore, this switches the changeover switch between the open and closed states.

[0076] When the mode switching handle 6 is in the automatic position, the changeover switch is in automatic operation mode. At this time, the controller inside the changeover switch will perform switching control according to the actual power supply status to control whether the equipment is powered by the main power supply or the backup power supply, so as to ensure the continuity of power supply.

[0077] When the power supply system needs maintenance, the mode switching handle 6 should be in the manual position and the operating handle 4 should be in the open position, so that the transfer switch is in a double open state, that is, both the main power supply and the backup power supply are disconnected.

[0078] The second end of the mode switching handle 6 extends out of the housing 1 so that the operator can directly contact the mode switching handle 6 and operate the mode switching handle 6 to switch between manual and automatic positions.

[0079] like Figure 4 and Figure 5 As shown, a third extension 7 is also provided on the housing 1. The third extension 7 is fixed relative to the housing 1, and the manner in which the third extension 7 is provided on the housing 1 is not limited here. For example, the third extension 7 can be fixedly provided on the housing 1 by welding, snap-fitting, or screw connection.

[0080] A fourth through hole 71 is provided on the third extension 7. The structure and dimensions of the fourth through hole 71 are not specifically limited here. The axis of the fourth through hole 71 can extend along the rotation axis of the operating handle 4.

[0081] It should be noted that the rotation axis of the mode switching handle 6 can be parallel to the rotation axis of the operating handle 4.

[0082] The second end is located between the third extension 7 and the first extension 2. When the mode switching handle 6 is in the manual position and the operating handle 4 is in the open position, one end of the locking member 5 passes through the fourth through hole 71, the first through hole 21, the third through hole, and the second through hole 31 in sequence. Furthermore, the extension path of the locking member 5 between the third extension 7 and the first extension 2 intersects the rotation path of the mode switching handle 6 as it switches from the manual position to the automatic position.

[0083] Thus, one end of the locking member 5 passes through the fourth through hole 71, the first through hole 21, the third through hole, and the second through hole 31 in sequence, which not only keeps the position of the operating handle 4 relative to the first extension 2 and the second extension 3 unchanged, but also keeps the position of the operating handle 4 relative to the housing 1 stationary, so that the operating handle 4 is always in the open position and cannot be switched to the closed position.

[0084] Furthermore, the extension path of the locking member 5 between the third extension 7 and the first extension 2 intersects with the rotation path of the mode switching handle 6 from the manual position to the automatic position. The locking member 5 can prevent the mode switching handle 6 from switching from the manual position to the automatic position, so that the mode switching handle 6 is always in the manual position and cannot be switched to the automatic position.

[0085] At this time, it can be ensured that the changeover switch is in the double-open state, allowing maintenance personnel to inspect the power supply system and ensuring their safety during maintenance. Simultaneously, it alerts other unsuspecting personnel, preventing them from accidentally operating the mode switching handle 6 and operating handle 4, reducing the probability of accidents, ensuring the personal safety of maintenance personnel, and avoiding unnecessary economic losses.

[0086] In another possible implementation, please combine Figures 1 to 3 As shown, the selector switch also includes a mode switching handle 6, which is rotatably mounted on the housing 1. The mode switching handle 6 has a manual position and an automatic position relative to the housing 1.

[0087] When the mode switching handle 6 rotates relative to the housing 1, the mode switching handle 6 switches between manual and automatic positions.

[0088] The second end of the mode switching handle 6 extends out of the housing 1 so that the operator can directly contact the mode switching handle 6 and operate the mode switching handle 6 to switch between manual and automatic positions.

[0089] A fifth through hole is provided on the second end. The structure and size of the fifth through hole are not specifically limited here. The axis of the fifth through hole can extend along the rotation axis of the operating handle 4.

[0090] like Figure 4 and Figure 5 As shown, the housing 1 is also provided with a third extension 7, and a fourth through hole 71 is provided on the third extension 7. The second end is located between the third extension 7 and the first extension 2. When the mode switching handle 6 is in the manual position and the operating handle 4 is in the open position, one end of the locking member 5 passes through the fourth through hole 71, the fifth through hole, the first through hole 21, the third through hole and the second through hole 31 in sequence.

[0091] Thus, when the mode switching handle 6 is in the manual position and the operating handle 4 is in the open position, one end of the locking member 5 passes through the fourth through hole 71, the fifth through hole, the first through hole 21, the third through hole, and the second through hole 31 in sequence. At this time, not only can the position of the operating handle 4 relative to the first extension 2 and the second extension 3 remain unchanged, but the position of the operating handle 4 relative to the housing 1 can also remain stationary, so that the operating handle 4 is always in the open position and cannot be switched to the closed position.

[0092] Furthermore, the locking member 5 passes through the fifth through hole and can limit the mode switching handle 6, so that the position of the mode switching handle 6 relative to the third extension 7 and the first extension 2 remains unchanged, so that the position of the mode switching handle 6 relative to the housing 1 remains unchanged, so that the mode switching handle 6 is always in the manual position and cannot be switched to the automatic position.

[0093] At this time, it can be ensured that the changeover switch is in the double-open state, allowing maintenance personnel to inspect the power supply system and ensuring their safety during maintenance. Simultaneously, it alerts other unsuspecting personnel, preventing them from accidentally operating the mode switching handle 6 and operating handle 4, reducing the probability of accidents, ensuring the personal safety of maintenance personnel, and avoiding unnecessary economic losses.

[0094] Alternatively, in specific implementations, through proper design, when the mode switching handle 6 is in the automatic position, the locking member 5 can pass through the fifth through hole to limit the mode switching handle 6. In this case, the mode switching handle 6 can be locked in the automatic position to prevent accidental operation by others, such as switching the mode switching handle 6 to the manual position and affecting the power supply to the load. In some embodiments, such as Figures 1 to 3 The locking component 5 includes a lead seal wire 51 and a lead seal block 52, with one end of the lead seal wire 51 disposed on the lead seal block 52. When the mode switching handle 6 is in the manual position and the operating handle 4 is in the open position, the other end of the lead seal wire 51 passes through the fourth through hole 71, the first through hole 21, the third through hole, and the second through hole 31 in sequence and couples with the lead seal block 52, thus keeping the lead seal wire 51 in a taut state.

[0095] At this time, because the lead seal line 51 is taut, it ensures that the operating handle 4 remains stationary relative to the housing 1, meaning the operating handle 4 can always be in the open position. When other unsuspecting personnel turn the operating handle 4, the lead seal line 51 will exert a force on the operating handle 4, bringing it closer to the open position. This prevents the operating handle 4 from being turned, keeping it in the open position and preventing it from being switched to the closed position.

[0096] Meanwhile, since the lead seal line 51 is in a taut state, when other unsuspecting staff accidentally operate the mode switching handle 6, the lead seal line 51 can block the mode switching handle 6, preventing the mode switching handle 6 from switching from the manual position to the automatic position.

[0097] This ensures that the transfer switch is in a dual-open state, guaranteeing the safety of maintenance personnel when inspecting the power supply system.

[0098] In specific implementation, when the operating handle 4 is in the open position, Figure 1 Taking the placement of the changeover switch as an example, compared to the first through hole 21 and the second through hole 31, the third through hole can be located on the side closer to the top of the changeover switch, so that the lead seal line 51 can apply a force to the operating handle 4 toward the open position.

[0099] Furthermore, the specific connection method between the lead seal line 51 and the lead seal block 52 is not specifically limited here.

[0100] When the maintenance is finished, the lead seal wire 51 can be removed. At this time, the operating handle 4 and the mode switching handle 6 can be rotated.

[0101] As an alternative, the locking element 5 includes a metal wire. When the mode switching handle 6 is in the manual position and the operating handle 4 is in the open position, one end of the metal wire passes through the fourth through hole 71, the first through hole 21, the third through hole and the second through hole 31 in sequence and is coupled to the other end of the metal wire, so that the metal wire is in a taut state.

[0102] At this time, because the metal wire is taut, it ensures that the operating handle 4 remains stationary relative to the housing 1, meaning the operating handle 4 can always be in the open position. When other unsuspecting personnel turn the operating handle 4, the metal wire will exert a force on the operating handle 4, bringing it closer to the open position. This prevents the operating handle 4 from turning, keeping it in the open position and preventing it from being switched to the closed position.

[0103] At the same time, since the metal wire is in a taut state, when other unsuspecting staff accidentally operate the mode switching handle 6, the metal wire can block the mode switching handle 6, preventing the mode switching handle 6 from switching from the manual position to the automatic position.

[0104] This ensures that the transfer switch is in a dual-open state, guaranteeing the safety of maintenance personnel when inspecting the power supply system.

[0105] Furthermore, in actual operation, the locking element 5 can be set as a lead sealing line 51 or a metal wire, which enriches the types of locking elements 5 and makes it easier to select and set them according to the actual situation.

[0106] In specific implementation, when the operating handle 4 is in the open position, Figure 1 Taking the placement of the changeover switch as an example, compared to the first through hole 21 and the second through hole 31, the third through hole can be located on the side closer to the top of the changeover switch, so that the metal wire can apply a force to the operating handle 4 toward the open position.

[0107] The two ends of the metal wire can be coupled together by welding or by tying a knot, etc., but in practice, it is not limited to these methods.

[0108] When the maintenance is finished, the metal wire can be removed. At this time, the operating handle 4 and the mode switching handle 6 can be rotated.

[0109] The metal wire can be made of copper, iron, or aluminum, etc. Of course, this is just an example and not a specific limitation.

[0110] As another possible implementation, when the operating handle 4 is in the open position, the axes of the first through hole 21, the second through hole 31, the third through hole, and the fourth through hole 71 coincide.

[0111] The locking member 5 includes a rigid rod, one end of which passes through the fourth through hole 71, the first through hole 21, the third through hole, and the second through hole 31 in sequence.

[0112] In this way, the rigid rod is not easily deformed. One end of the rigid rod passes through the fourth through hole 71, the first through hole 21, the third through hole, and the second through hole 31 in sequence, which allows the operating handle 4 to remain stationary relative to the housing 1, meaning the operating handle 4 can always be in the open position. When other unsuspecting personnel turn the operating handle 4, the rigid rod will exert a force on the operating handle 4 to move it closer to the open position. This prevents the operating handle 4 from being turned, keeping it in the open position and preventing it from being switched to the closed position.

[0113] Meanwhile, since the rigid rod is not easily deformed, when other unsuspecting staff accidentally operate the mode switching handle 6, the rigid rod can block the mode switching handle 6, preventing it from switching from the manual position to the automatic position.

[0114] Rigid bars can be made of copper, iron, aluminum, or wood, etc. Of course, this is just an example and not a specific limitation.

[0115] In one example, the first through hole 21 can be a circular hole, a rectangular hole, or a triangular hole. The second through hole 31 can be a circular hole, a rectangular hole, or a triangular hole. The third through hole can be a circular hole, a rectangular hole, or a triangular hole. Simultaneously, the fourth through hole 71 can be a circular hole, a rectangular hole, or a triangular hole. The fifth through hole can be a circular hole, a rectangular hole, or a triangular hole.

[0116] This enriches the structural types of the first through hole 21, the second through hole 31, the third through hole, the fourth through hole 71, and the fifth through hole, making it easier to select and set them according to actual conditions.

[0117] In practice, the structure and size of the first through hole 21, the second through hole 31, the third through hole, the fourth through hole 71 and the fifth through hole may be the same or different, and no specific limitation is made here.

[0118] In one alternative embodiment, the first extension 2 and the second extension 3 are both integrally formed with the housing 1. The third extension 7 may also be integrally formed with the housing 1.

[0119] At this point, the shell 1 is a one-piece structure, which not only avoids stress concentration problems caused by bolts or welding, but also ensures higher dimensional accuracy and consistency, and improves the structural strength of the shell 1. Moreover, there is no need to perform machining on the shell 1, reducing material usage and avoiding material waste.

[0120] Furthermore, the integrated structure reduces connection points, lowering the risk of failure due to loose connections, corrosion, or fatigue, and improving fatigue resistance. Additionally, it reduces the number of parts and assembly steps for housing 1, simplifying the operation process.

[0121] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" in mechanical structures can refer to a physical connection. A physical connection can be a fixed connection, such as a connection secured by fasteners, such as a connection secured by screws, bolts, or other fasteners; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

Claims

1. A changeover switch, characterized in that, include: The housing has a first extension and a second extension; the first extension has a first through hole and the second extension has a second through hole. An operating handle is rotatably mounted on the housing; a first end of the operating handle extends outside the housing; the first end is located between the first extension and the second extension; a third through hole is provided at the first end; the operating handle has an open position and an closed position relative to the housing; A locking member is provided, wherein when the operating handle is in the open position, one end of the locking member passes through the first through hole, the third through hole and the second through hole in sequence to prevent the operating handle from switching from the open position to the closed position.

2. The changeover switch according to claim 1, characterized in that, The switch also includes a mode switching handle, which is rotatably mounted on the housing; the second end of the mode switching handle extends outside the housing; the mode switching handle has a manual position and an automatic position relative to the housing. The housing is further provided with a third extension, and the third extension has a fourth through hole; the second end is located between the third extension and the first extension; when the mode switching handle is in the manual position and the operating handle is in the open position, one end of the locking member passes through the fourth through hole, the first through hole, the third through hole and the second through hole in sequence; and the extension path of the locking member between the third extension and the first extension intersects with the rotation path of the mode switching handle from the manual position to the automatic position.

3. The changeover switch according to claim 1, characterized in that, The switch also includes a mode switching handle, which is rotatably mounted on the housing; the second end of the mode switching handle extends out of the housing; a fifth through hole is provided on the second end; the mode switching handle has a manual position and an automatic position relative to the housing. The housing is also provided with a third extension, and the third extension has a fourth through hole; the second end is located between the third extension and the first extension; when the mode switching handle is in the manual position and the operating handle is in the open position, one end of the locking member passes through the fourth through hole, the fifth through hole, the first through hole, the third through hole and the second through hole in sequence.

4. The changeover switch according to claim 2, characterized in that, The locking component includes a lead seal wire and a lead seal block. One end of the lead seal wire is disposed on the lead seal block. When the mode switching handle is in the manual position and the operating handle is in the open position, the other end of the lead seal wire passes through the fourth through hole, the first through hole, the third through hole and the second through hole in sequence and is coupled to the lead seal block, so that the lead seal wire is in a taut state.

5. The changeover switch according to claim 2, characterized in that, The locking element includes a metal wire. When the mode switching handle is in the manual position and the operating handle is in the open position, one end of the metal wire passes through the fourth through hole, the first through hole, the third through hole and the second through hole in sequence and is coupled to the other end of the metal wire, so that the metal wire is in a taut state.

6. The changeover switch according to claim 2, characterized in that, When the operating handle is in the open position, the axes of the first through hole, the second through hole, the third through hole, and the fourth through hole coincide; the locking member includes a rigid rod, one end of which passes through the fourth through hole, the first through hole, the third through hole, and the second through hole in sequence.

7. The changeover switch according to claim 1, characterized in that, The first through hole is a circular hole, a rectangular hole, or a triangular hole; the second through hole is a circular hole, a rectangular hole, or a triangular hole; and the third through hole is a circular hole, a rectangular hole, or a triangular hole.

8. The changeover switch according to claim 1, characterized in that, Both the first extension and the second extension are integrally formed with the housing.

9. The changeover switch according to claim 3, characterized in that, The fifth through hole is a circular hole, a rectangular hole, or a triangular hole.

10. The changeover switch according to claim 3, characterized in that, The third extension is integrally formed with the housing.

Images