CN112185731A - Low-voltage electrical equipment change-over switch - Google Patents
Low-voltage electrical equipment change-over switch Download PDFInfo
- Publication number
- CN112185731A CN112185731A CN202011038249.3A CN202011038249A CN112185731A CN 112185731 A CN112185731 A CN 112185731A CN 202011038249 A CN202011038249 A CN 202011038249A CN 112185731 A CN112185731 A CN 112185731A
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- electrical equipment
- voltage electrical
- temperature
- toggle member
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/26—Interlocking, locking, or latching mechanisms for interlocking two or more switches
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/24—Interlocking, locking, or latching mechanisms for interlocking two or more parts of the mechanism for operating contacts
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Thermally Actuated Switches (AREA)
Abstract
The invention provides a low-voltage electrical equipment change-over switch which comprises a support, a gear, a rotating shaft, a rotating handle, a clamping ring and a second temperature-sensing deformation component, wherein one end of the rotating shaft is fixedly connected with the axis of the gear, the other end of the rotating shaft penetrates through the support and is rotatably connected with the support, an annular clamping groove is formed in the rotating handle, one end of the clamping ring is fixedly connected with the support, the other end of the clamping ring is slidably connected with the annular clamping groove, the rotating handle can freely rotate around the center of the clamping ring and is close to or far away from the support along the clamping ring, a key groove matched with the other end of the rotating shaft is formed in the center of the side face, opposite to the support, of the rotating handle, one end of the second. The invention can avoid the occurrence of accidents such as fire or electric shock and the like caused by forced switching-on of the change-over switch under the condition of high temperature, has the characteristic of simple integral structure, is convenient for installation and maintenance of the change-over switch, and has good practicability.
Description
Technical Field
The invention relates to the technical field of change-over switches, in particular to a change-over switch for low-voltage electrical equipment.
Background
The change-over switch is a switch electric appliance for switching over two or more than two power sources or loads. The change-over switch is widely applied to various occasions needing uninterrupted power supply, and realizes automatic change-over of a load circuit between two power supplies so as to ensure the reliability of power supply of a user.
The working temperature is monitored through the temperature sensor in the existing change-over switch, when the working temperature is too high, the action of a rotating handle is limited through a locking mechanism arranged in the change-over switch, so that the occurrence of accidents such as fire disasters or electric shocks caused by forced switching-on of the change-over switch under the high-temperature condition is avoided. However, the action of the rotating handle is limited by the temperature sensor and the locking mechanism, so that accidents such as fire or electric shock caused by forced closing of the change-over switch under the high-temperature condition are avoided, the structure of the change-over switch is complex, and the structure of the change-over switch needs to be improved.
Disclosure of Invention
On the basis, in order to solve the problem that the conventional change-over switch limits the action of a rotating handle through a temperature sensor and a locking mechanism so as to avoid the occurrence of accidents such as fire or electric shock and the like caused by forced switching-on of the change-over switch under the condition of high temperature, the invention provides a change-over switch of low-voltage electrical equipment, which has the following specific technical scheme:
a low-voltage electrical equipment change-over switch comprises a bracket, a gear and a rotating shaft, wherein one end of the rotating shaft is fixedly connected with the axis of the gear, the other end of the rotating shaft penetrates through the bracket and is rotationally connected with the bracket, the low-voltage electrical equipment change-over switch also comprises a rotating handle, a clamping ring and a second temperature sensing deformation component, an annular clamping groove is arranged in the rotating handle, one end of the clamping ring is fixedly connected with the bracket, the other end of the clamping ring is connected with the annular clamping groove in a sliding manner, the rotating handle can freely rotate around the circle center of the clamping ring and is close to or far away from the bracket along the clamping ring, a key groove matched with the other end of the rotating shaft is arranged at the center of the side surface of the rotating handle opposite to the bracket, one end of the second temperature sensing deformation part is fixedly connected with the support, and the other end of the second temperature sensing deformation part is over against the side face of the rotating handle opposite to the support.
The second temperature-sensitive deformation member has a characteristic of being elongated in an axial direction thereof with an increase in temperature. By adjusting the position sizes of the snap ring, the rotating handle and the second temperature sensing deformation component, a preset temperature threshold value, such as 65 degrees, can be set. When the working temperature of the change-over switch is lower than the preset temperature threshold value, the gear can be driven to perform corresponding actions by driving the rotating handle to freely rotate around the circle center of the clamping ring and to approach or leave the bracket along the clamping ring, so that the switching actions of different power circuits of the change-over switch are realized. When the working temperature of the change-over switch is higher than a preset temperature threshold value, the second temperature sensing deformation component extends to a preset length and limits the rotating handle to be close to the support along the clamping ring, so that an operator can not switch over different power supply circuits of the change-over switch through the rotating handle, and accidents such as fire disasters or electric shocks caused by forced switching-on of the change-over switch under the high-temperature condition are avoided.
Above-mentioned change over switch is through setting up second temperature sensing deformation part between twist grip and support, can avoid change over switch to close a floodgate by force under the high temperature condition and lead to the emergence of accident such as conflagration or electric shock, and it not only has the characteristics that overall structure is simple, and the change over switch's of still being convenient for installation is maintained, has fine practicality.
Optionally, the low-voltage electrical equipment transfer switch further includes a first toggle member and a second toggle member, the first toggle member and the second toggle member are installed on two sides of the gear, and the gear is engaged with the first toggle member and the second toggle member respectively.
Optionally, the low-voltage electrical equipment change-over switch further includes a first limiting block, a second limiting block and a first temperature-sensing deformation component, the first limiting block and the first toggle piece are far away from the side fixed connection of the gear, the second limiting block and the second toggle piece are far away from the side fixed connection of the gear, the first temperature-sensing deformation component is provided with two, one end of the first temperature-sensing deformation component is fixedly installed on the support and is respectively located on the first toggle piece and one side of the gear, which is far away from the second toggle piece, and the other end of the first temperature-sensing deformation component is respectively right opposite to the first limiting block and the second limiting block.
Optionally, the low-voltage electrical equipment change-over switch further comprises a pulley and a pull rope, the pulley is fixedly mounted on the support and located between the first stirring piece and the second stirring piece, one end of the pull rope is fixedly connected with the first stirring piece, and the other end of the pull rope is fixedly connected with the second stirring piece after bypassing the pulley.
Optionally, the low-voltage electrical equipment change-over switch further comprises a coil spring, one end of the coil spring is fixedly connected with the support, and the other end of the coil spring is in contact with the side face of the rotating handle, which is opposite to the support.
Optionally, the coil spring is located inside the snap ring.
Optionally, the first temperature-sensitive deformation component is a two-way memory spring.
Optionally, the two-way memory spring is formed by winding a CuZnAl memory alloy wire.
Optionally, the two-way memory spring is located inside the coil spring.
Drawings
The invention will be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the embodiments. Like reference numerals designate corresponding parts throughout the different views.
Fig. 1 is a schematic diagram of an overall structure of a low-voltage electrical equipment transfer switch according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an overall structure of a low-voltage electrical equipment transfer switch according to an embodiment of the present invention;
fig. 3 is a schematic diagram of the overall structure of a low-voltage electrical equipment transfer switch according to an embodiment of the present invention;
fig. 4 is a schematic diagram of the overall structure of a low-voltage electrical equipment transfer switch according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a second temperature-sensitive deformation component of a low-voltage electrical equipment switch according to an embodiment of the present invention.
Description of reference numerals:
1. a support; 2. a gear; 3. a rotating shaft; 4. rotating the handle; 5. a snap ring; 6. a second temperature sensitive deformation member; 7. a keyway; 8. a first toggle piece; 9. a second toggle piece; 10. a first stopper; 11. a second limiting block; 12. a first temperature sensitive deformation member; 13. a pulley; 14. pulling a rope; 15. an annular clamping groove; 16. a coil spring; 17. a housing; 18. sealing the cavity; 19. a push rod.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to embodiments thereof. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, 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 invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The terms "first" and "second" used herein do not denote any particular order or quantity, but rather are used to distinguish one element from another.
As shown in fig. 1, a low-voltage electrical equipment transfer switch in an embodiment of the present invention includes a bracket 1, a gear 2, and a rotating shaft 3, wherein one end of the rotating shaft 3 is fixedly connected to an axis of the gear 2, and the other end of the rotating shaft 3 penetrates through the bracket 1 and is rotatably connected to the bracket 1. Low voltage electrical equipment change over switch still includes twist grip 4, snap ring 5 and second temperature sensing deformation part 6, the one end of snap ring 5 with 1 fixed connection of support, be equipped with annular clamping groove 15 in the twist grip 4, the other end card of snap ring 5 in the annular clamping groove 15 and pass through annular clamping groove 15 with twist grip 4 sliding connection, twist grip 4 can wind the centre of a circle free rotation of snap ring 5 and follow the snap ring 5 is close to or keeps away from support 1, twist grip 4 with the support 1 relative side center be equipped with the other end assorted keyway 7 of pivot 3, the one end of second temperature sensing deformation part 6 with 1 fixed connection of support, the other end of second temperature sensing deformation part 6 just right twist grip 4 with the support 1 relative side. When the rotating handle 4 is close to the bracket 1 along the snap ring 5, the key slot 7 on the rotating handle 4 is clamped into the other end of the rotating shaft 3. At this time, the rotation of the rotating shaft 3 and the gear 2 can be driven by rotating the rotating handle 4.
The second temperature-sensitive deformation member 6 has a property of being elongated in its axial direction with an increase in temperature. By adjusting the position and size of the snap ring 5, the rotating handle 4 and the second temperature sensing deformation element 6, a preset temperature threshold value, for example 65 degrees, can be set. When the working temperature of the change-over switch is lower than a preset temperature threshold value and the second temperature-sensitive deformation component 6 does not extend to a preset length, the gear 2 can be driven to perform corresponding actions by driving the rotating handle 4 to freely rotate around the circle center of the clamping ring 5 and to be close to or far away from the bracket 1 along the clamping ring 5, so that the switching actions of different power circuits of the change-over switch are realized. When the working temperature of the change-over switch is higher than a preset temperature threshold value, the second temperature-sensitive deformation component 6 extends to a preset length and limits the rotating handle 4 to be close to the support 1 along the clamping ring 5, so that an operator cannot switch over different power circuits of the change-over switch through the rotating handle 4, and accidents such as fire disasters or electric shocks caused by forced switching-on of the change-over switch under the high-temperature condition are avoided.
Above-mentioned change over switch is through setting up second temperature sensing deformation part 6 between twist grip 4 and support 1, can avoid change over switch to close a floodgate by force under the high temperature condition and lead to the emergence of accident such as conflagration or electric shock, and it not only has the characteristics that overall structure is simple, and the change over switch's of still being convenient for installation is maintained, has fine practicality.
As shown in fig. 2, in one embodiment, the low-voltage electrical equipment transfer switch further includes a first toggle member 8 and a second toggle member 9, the first toggle member 8 and the second toggle member 9 are installed on two sides of the gear 2, and the gear 2 is engaged with the first toggle member and the second toggle member 9 respectively. One end of each of the first toggle member 8 and the second toggle member 9 is in transmission connection with a different moving contact (not shown in the figure) of the transfer switch, and the rotating handle 4 is rotated to drive the rotating shaft 3 and the gear 2 to rotate, so as to drive the first toggle member 8 and the second toggle member 9 to move up and down alternately, so that the different moving contacts of the transfer switch are in contact with a fixed contact (not shown in the figure), and the transfer switch can be switched between different power supplies.
For the existing transfer switch, the working temperature is generally monitored through a temperature sensor, and when the working temperature is too high, each power circuit of the transfer switch is remotely controlled to carry out switching-off operation so as to avoid accidents such as fire or electric shock. However, each power circuit of the transfer switch is controlled to be switched off at high temperature by monitoring and remotely controlling the temperature sensor, and the problem that the transfer switch cannot be controlled to be switched off timely and effectively due to communication faults or data transmission errors of the temperature sensor and the control system exists.
In order to solve the above problem, in one embodiment, as shown in fig. 2, the low-voltage electrical equipment change-over switch further includes a first limiting block 10, a second limiting block 11, and a first temperature-sensitive deformation component 12, where the first limiting block 10 is fixedly connected to a side of the first toggle component 8 away from the gear 2, the second limiting block 11 is fixedly connected to a side of the second toggle component 9 away from the gear 2, two first temperature-sensitive deformation components 12 are provided, one ends of the two first temperature-sensitive deformation components 12 are both fixedly mounted on the bracket 1 and are respectively located at one sides of the first toggle component 8 and the second toggle component 9 away from the gear 2, and the other ends of the two first temperature-sensitive deformation components 12 are respectively opposite to the first limiting block 10 and the second limiting block 11.
The first temperature-sensitive deformation component 12 has the characteristic of deformation and elongation along with temperature rise, and when the temperature of the first temperature-sensitive deformation component 12 is greater than a preset temperature threshold, the first temperature-sensitive deformation component 12 is heated and elongated and pushes the first toggle piece 8 or the second toggle piece 9 to act, so that a power circuit which is already switched on in the transfer switch is driven to be switched off. Meanwhile, when the temperature of the change-over switch is higher than a preset temperature threshold value, if each power supply circuit of the change-over switch is in a switching-off state, the first temperature-sensitive deformation component 12 can limit an operator to switch on different power supply circuits of the change-over switch through the rotating handle 4.
Through setting up first stopper 10, second stopper 11 and first temperature sensing deformation part 12, not only can restrict change over switch and carry out the switching over work of power supply circuit when high temperature, can also carry out the separating brake operation to being in combined floodgate state power supply circuit through promoting first stirring 8 or second stirring 9 upward movements, can overcome current change over switch and carry out the separating brake action of power supply circuit when high temperature through temperature sensor control and remote control change over switch and the problem that leads to unable effective control change over switch in time to carry out the separating brake action because of temperature sensor and control system communication trouble or data transmission mistake that exist, its overall structure is simple, safety and reliability.
In one embodiment, as shown in fig. 3, the low-voltage electrical equipment change-over switch further includes a pulley 13 and a pull rope 14, the pulley 13 is fixedly mounted on the bracket 1 and located between the first toggle member 8 and the second toggle member 9, one end of the pull rope 14 is fixedly connected to the first toggle member 8, and the other end of the pull rope 14 is fixedly connected to the second toggle member 9 after passing around the pulley 13. The pull cord 14 and the pulley 13 are used for preventing the first toggle part 8 and the second toggle part 9 from moving in the same direction, so that different power circuits of the change-over switch are simultaneously switched on. When the first toggle element 8 or the second toggle element 9 moves downwards, due to the existence of the pull rope 14 and the pulley 13, the situation that the other toggle element moves downwards at the same time to cause the simultaneous closing of different power circuits of the change-over switch can be prevented.
In one embodiment, as shown in fig. 4, the low-voltage electrical equipment changeover switch further includes a coil spring 16, one end of the coil spring 16 is fixedly connected to the bracket 1, and the other end of the coil spring 16 is in contact with the side surface of the rotating handle 4 opposite to the bracket 1.
The coil spring 16 is located inside or outside the snap ring 5. Through setting up coil spring 16, pressing rotating handle 4 to support 1 and compression bolt spring, making the draw-in groove buckle at the other end of pivot 3, then drive pivot 3 and gear 2 through rotating handle 4 and rotate in order to accomplish the switching action between the different power supply circuit of change over switch after, the elasticity of coil spring 16 storage can reset rotating handle 4, so can avoid field work personnel to touch rotating handle 4 carelessly and the problem of change over switch maloperation appears.
In one embodiment, the first temperature-sensitive deformation element 12 is a two-way memory spring formed by winding a CuZnAl memory alloy wire, and the two-way memory spring is positioned at the inner side of the coil spring 16. The two-way memory spring has a characteristic that its length becomes longer in the axial direction as the temperature increases. The two-way memory spring is formed by winding CuZnAl memory alloy wires and has the advantages of simple structure and low price.
In the present invention, since the position relationship and the connection manner between the first toggle element 8 and the second toggle element 9 and the different moving contacts of the change-over switch, and between the different moving contacts and the fixed contact are included, and the size of the second temperature-sensing deformation element 6 and other elements are included, a person skilled in the art can adjust and set the size according to the actual situation, and thus, the details are not described herein.
In one embodiment, as shown in fig. 5, the second temperature-sensitive deformation member 6 includes a housing 17 and a push rod 19, the housing 17 is fixedly mounted on the bracket 1, a sealed cavity 18 is provided in the housing 17, an expandable material is filled in the sealed cavity 18, one end of the push rod 19 extends into the sealed cavity 18, and the other end of the push rod 19 penetrates through the sealed cavity 18 and is close to the side wall of the rotating handle 4, and is connected to the sealed cavity 18 and the side wall of the rotating handle 4 in a sliding and sealing manner.
When the working temperature of the change-over switch is lower than the preset temperature threshold value, the expandable substance in the sealed cavity 18 does not push the push rod 19 to extend out of the sealed cavity 18 to a preset length. At this time, the gear 2 can be driven to perform corresponding actions by driving the rotating handle 4 to freely rotate around the circle center of the clamping ring 5 and approach or leave the bracket 1 along the clamping ring 5, so as to realize the switching actions of different power circuits of the change-over switch. When the working temperature of the change-over switch is higher than a preset temperature threshold value, the expandable substance is heated to expand, the size of the expandable substance is increased, the push rod 19 is pushed to extend out of the sealed containing cavity 18 to a preset length, the rotating handle 4 is limited to be close to the support 1 along the clamping ring 5, so that an operator cannot switch over different power circuits of the change-over switch through the rotating handle 4, and accidents such as fire disasters or electric shocks caused by forced switching-on of the change-over switch under the high-temperature condition are avoided.
In one embodiment, the swellable substance is paraffin. The housing 17 and the push rod 19 are made of an aluminum alloy material with good thermal conductivity, so that paraffin can sense the operating temperature of the change-over switch more quickly.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A low-voltage electrical equipment change-over switch comprises a bracket, a gear and a rotating shaft, wherein one end of the rotating shaft is fixedly connected with the axis of the gear, the other end of the rotating shaft penetrates through the bracket and is rotationally connected with the bracket, it is characterized in that the low-voltage electrical equipment change-over switch also comprises a rotating handle, a snap ring and a second temperature-sensing deformation component, an annular clamping groove is arranged in the rotating handle, one end of the clamping ring is fixedly connected with the bracket, the other end of the clamping ring is connected with the annular clamping groove in a sliding manner, the rotating handle can freely rotate around the circle center of the clamping ring and is close to or far away from the bracket along the clamping ring, a key groove matched with the other end of the rotating shaft is arranged at the center of the side surface of the rotating handle opposite to the bracket, one end of the second temperature sensing deformation part is fixedly connected with the support, and the other end of the second temperature sensing deformation part is over against the side face of the rotating handle opposite to the support.
2. A low voltage electrical equipment transfer switch according to claim 1, further comprising a first toggle member and a second toggle member, the first toggle member and the second toggle member being mounted on opposite sides of the gear, the gear being engaged with the first toggle member and the second toggle member, respectively.
3. The low-voltage electrical equipment change-over switch according to claim 2, further comprising a first limiting block, a second limiting block and two temperature-sensitive deformation components, wherein the first limiting block is fixedly connected with the side surface of the first toggle member away from the gear, the second limiting block is fixedly connected with the side surface of the second toggle member away from the gear, one end of each of the two temperature-sensitive deformation components is fixedly mounted on the bracket and is respectively located on one side of the first toggle member away from the gear, and the other end of each of the two temperature-sensitive deformation components is respectively opposite to the first limiting block and the second limiting block.
4. A low-voltage electrical equipment switch according to claim 3, wherein said low-voltage electrical equipment switch further comprises a pulley and a pull cord, said pulley is fixedly mounted on said bracket and located between said first toggle member and said second toggle member, one end of said pull cord is fixedly connected to said first toggle member, and the other end of said pull cord is fixedly connected to said second toggle member after passing around said pulley.
5. A low voltage electrical equipment transfer switch according to claim 3, further comprising a coil spring, one end of said coil spring being fixedly connected to said support, the other end of said coil spring being in contact with a side of said twist grip opposite said support.
6. A low voltage electrical equipment transfer switch according to claim 5, wherein said coil spring is located inside said snap ring.
7. The low-voltage electrical equipment switcher of claim 6, wherein the first temperature-sensitive deformation member is a two-way memory spring.
8. A low-voltage electrical equipment diverter switch according to claim 7, characterized in that said two-way memory spring is wound from a wire of CuZnAl memory alloy.
9. A low voltage electrical equipment transfer switch according to claim 8, wherein said two-way memory spring is located inside said coil spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011038249.3A CN112185731B (en) | 2020-09-28 | 2020-09-28 | Low-voltage electrical equipment change-over switch |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011038249.3A CN112185731B (en) | 2020-09-28 | 2020-09-28 | Low-voltage electrical equipment change-over switch |
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| Publication Number | Publication Date |
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| CN112185731A true CN112185731A (en) | 2021-01-05 |
| CN112185731B CN112185731B (en) | 2023-04-11 |
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| CN202011038249.3A Active CN112185731B (en) | 2020-09-28 | 2020-09-28 | Low-voltage electrical equipment change-over switch |
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| JP2003031099A (en) * | 2001-07-18 | 2003-01-31 | Kawamura Electric Inc | Handle lock of circuit breaker |
| JP2004288513A (en) * | 2003-03-24 | 2004-10-14 | Matsushita Electric Ind Co Ltd | Switching device |
| CN203910623U (en) * | 2014-06-20 | 2014-10-29 | 乐清市格力电器有限公司 | Universal change-over switch |
| CN204011156U (en) * | 2014-08-06 | 2014-12-10 | 浙江现代电气有限公司 | A kind of automatic change-over |
| CN205845753U (en) * | 2016-07-25 | 2016-12-28 | 杭州梅兰日兰电器有限公司 | Double power supply automatic transfer switch |
| CN205984716U (en) * | 2016-08-30 | 2017-02-22 | 浙江万松电气有限公司 | Dual supply automatic switchover switch electrical apparatus |
| CN206451627U (en) * | 2016-12-31 | 2017-08-29 | 施耐德万高（天津）电气设备有限公司 | The padlock instruction device of change-over switch |
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2020
- 2020-09-28 CN CN202011038249.3A patent/CN112185731B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003031099A (en) * | 2001-07-18 | 2003-01-31 | Kawamura Electric Inc | Handle lock of circuit breaker |
| JP2004288513A (en) * | 2003-03-24 | 2004-10-14 | Matsushita Electric Ind Co Ltd | Switching device |
| CN203910623U (en) * | 2014-06-20 | 2014-10-29 | 乐清市格力电器有限公司 | Universal change-over switch |
| CN204011156U (en) * | 2014-08-06 | 2014-12-10 | 浙江现代电气有限公司 | A kind of automatic change-over |
| CN205845753U (en) * | 2016-07-25 | 2016-12-28 | 杭州梅兰日兰电器有限公司 | Double power supply automatic transfer switch |
| CN205984716U (en) * | 2016-08-30 | 2017-02-22 | 浙江万松电气有限公司 | Dual supply automatic switchover switch electrical apparatus |
| CN206451627U (en) * | 2016-12-31 | 2017-08-29 | 施耐德万高（天津）电气设备有限公司 | The padlock instruction device of change-over switch |
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| CN112185731B (en) | 2023-04-11 |
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