CN114664580A - Electromagnetic repulsion coil and repulsion mechanism - Google Patents

Electromagnetic repulsion coil and repulsion mechanism Download PDF

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Publication number
CN114664580A
CN114664580A CN202111599213.7A CN202111599213A CN114664580A CN 114664580 A CN114664580 A CN 114664580A CN 202111599213 A CN202111599213 A CN 202111599213A CN 114664580 A CN114664580 A CN 114664580A
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CN
China
Prior art keywords
coil
electromagnetic repulsion
insulating plate
repulsion
sealing cover
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202111599213.7A
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Chinese (zh)
Inventor
熊萍萍
孙珂珂
徐华
李久良
周阳洋
王绍安
陈孝信
王鑫
孙英杰
张利欣
胡延涛
门博
姚文彬
耿晓璐
刘璐
郭东方
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Zhejiang Electric Power Co Ltd
Pinggao Group Co Ltd
Original Assignee
State Grid Zhejiang Electric Power Co Ltd
Pinggao Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by State Grid Zhejiang Electric Power Co Ltd, Pinggao Group Co Ltd filed Critical State Grid Zhejiang Electric Power Co Ltd
Priority to CN202111599213.7A priority Critical patent/CN114664580A/en
Publication of CN114664580A publication Critical patent/CN114664580A/en
Pending legal-status Critical Current

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00Mechanisms for operating contacts
    • H01H3/22Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/28Power arrangements internal to the switch for operating the driving mechanism using electromagnet
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00Mechanisms for operating contacts
    • H01H3/60Mechanical arrangements for preventing or damping vibration or shock
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/02Bases, casings, or covers

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)

Abstract

The invention relates to an electromagnetic repulsion coil and a repulsion mechanism. The electromagnetic repulsion coil comprises an insulating plate, an annular embedded groove is formed in the insulating plate, and a coil is fixedly placed in the embedded groove; the electromagnetic repulsion coil also comprises a sealing cover, the sealing cover is connected with the insulating plate and/or the coil to cover the end face of the coil, and the sealing cover is used for buffering the impact of the metal disc on the coil. In the electromagnetic repulsion coil, the insulating plate is used as the base body of the coil, and the coil is covered with the sealing cover to buffer the impact of the metal disc on the coil, so that the impact resistance of the coil is improved, and the service life of the coil is prolonged. Compared with the epoxy resin casting body in the prior art, the combined impact resistance of the insulating plate and the sealing cover is better, and the impact resistance of the electromagnetic repulsion coil can be improved.

Description

Electromagnetic repulsion coil and repulsion mechanism
Technical Field
The invention relates to an electromagnetic repulsion coil and a repulsion mechanism, in particular to buffer protection of the coil.
Background
In recent years, the application of electromagnetic repulsion mechanism in high-voltage alternating current and direct current switch products is becoming more extensive, and electromagnetic repulsion coil is used as the core part of repulsion mechanism, and its insulating property and shock resistance capability have always been a key factor that restricts the mechanical operation life of repulsion mechanism.
In the prior art, the structure of the repulsion mechanism is mostly as disclosed in chinese patent document with an authorization publication number of CN210073746U, and is shown in fig. 1, and includes a closing coil 12 and an opening coil 11 that are arranged at intervals, a metal disc 13 is arranged between the closing coil 12 and the opening coil 11, a pull rod 14 is connected to the metal disc 13, the pull rod 14 is in transmission connection with a moving contact of a high-speed mechanical switch when in use, when the closing coil 12 is energized, a repulsion force is generated between the closing coil 12 and the metal disc 13 to drive the metal disc 13 and the pull rod 14 to move in a closing direction, and when the opening coil 11 is energized, a repulsion force is generated between the opening coil 11 and the metal disc 13 to drive the metal disc 13 and the pull rod 14 to move in an opening direction.
The electromagnetic repulsion coil (including closing coil and separating coil) among the prior art adopts epoxy as the support base member mostly, but epoxy casting spare is fragile material, shock resistance is relatively poor, because repulsion mechanism divide-shut brake speed is very fast, in operation process, metal disc moving speed is high, and the impact force is strong, can produce more serious mechanical impact to repulsion coil, this just leads to repulsion mechanism in carrying out the experimental authentication process of mechanical reliability, repulsion coil is owing to receive the multiple impact of metal disc, the support base member that epoxy made is easy to take place the fracture breakage, lead to the reliability reduction of product.
Disclosure of Invention
The invention aims to provide an electromagnetic repulsion coil, which aims to solve the technical problems that the service life of the electromagnetic repulsion coil is short and the reliability of a repulsion mechanism is reduced due to poor impact resistance of the electromagnetic repulsion coil in the prior art. The present invention also aims to provide a repulsive force mechanism to solve the above technical problems.
In order to achieve the purpose, the technical scheme of the electromagnetic repulsion coil is as follows:
the electromagnetic repulsion coil comprises an insulating plate, wherein an annular embedded groove is formed in the insulating plate, and a coil is fixedly placed in the embedded groove; the electromagnetic repulsion coil also comprises a sealing cover, the sealing cover is connected with the insulating plate and/or the coil to cover the end face of the coil, and the sealing cover is used for buffering the impact of the metal disc on the coil.
The beneficial effects are that: in the electromagnetic repulsion coil, the insulating plate is used as the base body of the coil, and the upper end face of the coil is covered with the sealing cover to buffer the impact of the metal disc on the coil, so that the impact resistance of the coil is improved, and the service life of the coil is prolonged. Compared with the epoxy resin casting body in the prior art, the combined impact resistance of the insulating plate and the sealing cover is better, and the impact resistance of the electromagnetic repulsion coil can be improved.
In a further improvement, the electromagnetic repulsion coil further comprises fixing glue, and the fixing glue is filled between the inner embedded groove and the coil so as to fix the coil in the inner embedded groove.
The beneficial effects are that: the coil is fixed in the embedded groove through the fixing glue, so that the coil is prevented from shaking and being damaged when being impacted, and the service life of the coil is prolonged.
In a further improvement, an elastic buffer cushion is fixed on one side of the insulating plate, which is back to the embedded groove.
The beneficial effects are that: the elastic buffer cushion is fixed on the insulating plate and serves as a base body of the coil, so that the coil is provided with a buffer function, and when the coil is mechanically impacted by the metal disc, part of impact force can be absorbed and buffered, the impact resistance of the coil is improved, the service life of the coil is prolonged, and the mechanical reliability of the repulsion mechanism is improved.
Further improved, the peripheral surface of the elastic buffer pad is provided with a groove.
The beneficial effects are that: design like this, the elastic buffer pad of being convenient for outwards expands when receiving the impact, and the groove department can hold the outer expanded elastic buffer pad, improves elastic buffer pad's buffer capacity.
The further improvement is that at least two grooves are arranged at intervals, and the interval arrangement direction of each groove is consistent with the interval arrangement direction of the insulating plate and the elastic cushion pad.
The beneficial effects are that: design like this, through setting up two at least grooves, can hold the expanded elastic buffer pad outward more, further promote elastic buffer pad's buffer capacity.
In a further development, the elastic buffer pad is fixed to the insulating plate by means of adhesive bonding.
The beneficial effects are that: fix the elastic buffer pad on the insulation board through the insulating cement, simple structure, the realization of being convenient for.
In a further improvement, the elastic buffer cushion is a composite polyurethane buffer cushion.
The beneficial effects are that: the elastic buffer cushion made of the polyurethane material has stronger shock resistance, and is beneficial to ensuring the shock resistance of the coil.
In a further improvement, the insulating plate is an epoxy glass fiber insulating plate.
The beneficial effects are that: the insulating plate made of the epoxy glass fiber material has the advantages of high insulativity, impact resistance, strength and cost performance.
In a further improvement, the outside of the coil is sprayed with a layer of insulating paint.
The beneficial effects are that: the design improves the insulation outside the coil.
In order to realize the purpose, the technical scheme of the repulsion mechanism of the invention is as follows:
the repulsion mechanism comprises a closing coil and an opening coil which are arranged at intervals, a metal disc is arranged between the closing coil and the opening coil, a pull rod is connected onto the metal disc, the closing coil and the opening coil both comprise insulating plates, annular embedded grooves are formed in the insulating plates, and coils are fixedly placed in the embedded grooves; the electromagnetic repulsion coil also comprises a sealing cover, the sealing cover is connected with the insulating plate and/or the coil to cover the end face of the coil, and the sealing cover is used for buffering the impact of the metal disc on the coil.
The beneficial effects are that: in the electromagnetic repulsion coil, the insulating plate is used as the base body of the coil, and the upper end face of the coil is covered with the sealing cover to buffer the impact of the metal disc on the coil, so that the impact resistance of the coil is improved, and the service life of the coil is prolonged. Compared with the epoxy resin casting body in the prior art, the combined impact resistance of the insulating plate and the sealing cover is better, and the impact resistance of the electromagnetic repulsion coil can be improved.
In a further improvement, the repulsion mechanism further comprises fixing glue, and the fixing glue is filled between the embedded groove and the coil so as to fix the coil in the embedded groove.
The beneficial effects are that: the coil is fixed in the embedded groove through the fixing glue, so that the coil is prevented from shaking and being damaged when being impacted, and the service life of the coil is prolonged.
In a further improvement, an elastic buffer cushion is fixed on one side of the insulating plate, which is back to the embedded groove.
The beneficial effects are that: the elastic buffer cushion is fixed on the insulating plate and serves as a base body of the coil, so that the coil is provided with a buffer function, and when the coil is mechanically impacted by the metal disc, part of impact force can be absorbed and buffered, the impact resistance of the coil is improved, the service life of the coil is prolonged, and the mechanical reliability of the repulsion mechanism is improved.
Further improved, the peripheral surface of the elastic buffer pad is provided with a groove.
The beneficial effects are that: design like this, the elastic buffer pad of being convenient for outwards expands when receiving the impact, and the groove department can hold the outer expanded elastic buffer pad, improves elastic buffer pad's buffer capacity.
The further improvement is that at least two grooves are arranged at intervals, and the interval arrangement direction of each groove is consistent with the interval arrangement direction of the insulating plate and the elastic cushion pad.
The beneficial effects are that: design like this, through setting up two at least grooves, can hold the expanded elastic buffer pad outward more, further promote elastic buffer pad's buffer capacity.
In a further development, the elastic buffer pad is fixed to the insulating plate by means of adhesive bonding.
The beneficial effects are that: fix the elastic buffer pad on the insulation board through the insulating cement, simple structure, the realization of being convenient for.
In a further improvement, the elastic buffer cushion is a composite polyurethane buffer cushion.
The beneficial effects are that: the elastic buffer cushion made of the polyurethane material has stronger shock resistance, and is beneficial to ensuring the shock resistance of the coil.
In a further improvement, the insulating plate is an epoxy glass fiber insulating plate.
The beneficial effects are that: the insulating plate made of the epoxy glass fiber material has the advantages of high insulativity, impact resistance, strength and cost performance.
In a further improvement, the outside of the coil is sprayed with a layer of insulating paint.
The beneficial effects are that: the design improves the insulation outside the coil.
Drawings
FIG. 1 is a schematic diagram of a prior art repulsive force mechanism;
FIG. 2 is a schematic diagram of the structure of the electromagnetic repulsion coil of the present invention;
fig. 3 is an enlarged view of a portion of fig. 2 at the coil.
In the figure: 11. a brake separating coil; 12. a closing coil; 13. a metal disc; 14. a pull rod; 15. an insulating plate; 16. an elastic cushion pad; 17. sealing the cover; 18. fixing glue; 19. a coil; 20. a trench; 21. and (4) embedding a groove.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, terms such as "comprises," "comprising," or any other variation thereof, which may be present, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, elements recited by the phrases "comprising an … …," or the like, do not exclude the presence of such elements, processes, or methods.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or a non-detachable connection. The specific meanings of the above-mentioned terms in the present invention can be understood by those skilled in the art through specific situations.
The present invention will be described in further detail with reference to examples.
Embodiment 1 of electromagnetic repulsion coil of the present invention:
in this embodiment, as shown in fig. 2 and 3, the electromagnetic repulsion coil includes an insulating plate 15, the insulating plate 15 serves as a first base of the electromagnetic repulsion coil and fixes and supports the coil 19, and the insulating plate 15 is made of an epoxy glass fiber material with high impact resistance, insulation property, strength, and the like, so as to ensure the impact resistance of the electromagnetic repulsion coil 11. The insulating plate 15 is provided with an inner insertion groove 21 for fixing and placing the coil 19, and the opening of the inner insertion groove 21 is arranged towards the metal disc. The coil is placed in the embedded groove 21, the coil 19 is supported by a plurality of turns of copper flat wires, and the copper flat wires and gaps between the coil 19 and the embedded groove 21 are filled with fixing glue 18 so as to fill and fix the coil 19 in the embedded groove 21. The upper end face of the coil 19 (i.e., the end face facing the metal plate when in use) is covered with a cover 17 having an insulating property, and the cover 17 is fitted into the inner fitting groove 21 to buffer the impact force of the metal plate against the electromagnetic repulsion coil when the metal plate is struck against the electromagnetic repulsion coil. Wherein the cover 17 is also fixed on the coil 19 by means of a fixing glue 18. In this embodiment, the fixing glue 18 is epoxy resin. In other embodiments, the securing glue may be a polyester glue.
In actual use, the initial distance between the coil 19 and the metal plate has a large influence on the repulsive force, and both the repulsive force and the coil protection need to be considered when designing the thickness of the cover 17.
As shown in fig. 2 and fig. 3, the bottom end face of the insulating plate 15 (i.e. the end face facing away from the metal disc when in use) is bonded with the elastic buffer 16 as the second base body of the electromagnetic repulsion coil through the insulating glue, which plays a role in fixing and supporting the coil 19, the elastic buffer 16 is made of composite polyurethane material, the outer peripheral surface of the elastic buffer 16 is processed with a plurality of grooves 20, the spacing direction of each groove 20 is consistent with the spacing arrangement direction of the insulating plate 15 and the elastic buffer 16, so as to improve the buffering capacity of the electromagnetic repulsion coil, and meanwhile, the electromagnetic repulsion coil has a buffering function, thereby improving the impact resistance of the electromagnetic repulsion coil and improving the mechanical reliability of the repulsion mechanism.
In the electromagnetic repulsion coil, the insulating plate is used as a first base body of the coil, and the upper end face of the coil is covered with the sealing cover to buffer the impact of the metal disc on the coil, so that the impact resistance of the coil is improved; meanwhile, an elastic cushion pad is fixed on the bottom end face of the insulating plate and serves as a second substrate, so that the coil is provided with a buffer function, and when the coil is mechanically impacted by the metal disc, part of impact force can be absorbed and buffered, the impact resistance of the coil is improved, the service life of the coil is prolonged, and the mechanical reliability of the repulsion mechanism is improved. Compared with the epoxy resin casting body in the prior art, the insulating plate has better shock resistance, and the shock resistance of the whole electromagnetic repulsion coil can be further improved due to the buffering effect of the elastic buffering cushion.
It should be noted that, in the present embodiment, the surface of the copper flat wire of the coil 19 is sprayed with an insulating varnish to ensure the external insulation of the copper flat wire.
Embodiment 2 of electromagnetic repulsion coil of the present invention:
the present example differs from example 1 in that: in embodiment 1, the coil 19 is fixed in the inner groove 21 by the fixing glue 18, and a cover 17 is covered on the upper end face of the coil 19. In the embodiment, a circle of ring groove is additionally formed in the notch of the inner embedded groove, the size of the sealing cover is increased, the sealing cover is placed in the ring groove and fixed on the insulating plate through a countersunk head bolt and the like during assembly, and the coil is tightly pressed at the bottom of the inner embedded groove through the sealing cover. In other embodiments, the modes of embodiment 1 and embodiment 2 may be combined.
Example 3 of electromagnetic repulsion coil of the present invention:
the present example differs from example 1 in that: in example 1, the elastic cushion 16 is fixed to the bottom end surface of the insulating plate 15 by adhesive with an insulating paste. In this embodiment, the bolt fastening that elastic cushion and insulation board adopted from top to bottom to at the insulating cover of pole portion suit of bolt, the head installation insulation board of bolt, in order to realize the insulation of bolt, and this bolt is provided with a plurality ofly along the circumference of insulation board, guarantees elastic cushion and insulation board firm in connection.
Embodiment 4 of electromagnetic repulsion coil of the present invention:
this example differs from example 1 in that: in example 1, the insulating plate 15 is made of epoxy glass fiber, and the elastic cushion 16 is made of a composite polyurethane material. In this embodiment, the insulation board adopts polytetrafluoroethylene material to make, and elastic buffer pad adopts materials such as the rubber that buffer capacity is stronger to make. In other embodiments, the elastic cushion pad can be made of foam, and the insulating plate can be made of epoxy phenolic resin.
Embodiment 5 of electromagnetic repulsion coil of the present invention:
this example differs from example 1 in that: in embodiment 1, the outer peripheral surface of the elastic cushion pad 16 is provided with grooves. In this embodiment, the trench is eliminated.
Embodiment 6 of electromagnetic repulsion coil of the invention:
this example differs from example 1 in that: in embodiment 1, the outer peripheral surface of the elastic cushion pad 16 is provided with a plurality of grooves 20. In this embodiment, there may be only one groove.
Embodiment 7 of electromagnetic repulsion coil of the invention:
this example differs from example 1 in that: in example 1, an elastic cushion 16 is fixed to the insulating plate 15. In this embodiment, cancel the elastic buffer pad, compare the base member that epoxy poured among the prior art, the shock resistance of insulation board, closing cap is better.
Embodiments of the repulsive force mechanism of the present invention: the repulsion mechanism comprises an opening coil 11 and a closing coil 12 which are arranged at intervals, a metal disc 13 is arranged between the opening coil 11 and the closing coil 12, and a pull rod 14 is connected to the metal disc 13. The structures of the opening coil 11 and the closing coil 12 are the same as those of the electromagnetic repulsion coils described in embodiments 1 to 7, and are not described herein again.
Finally, although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments without departing from the inventive concept, or some of the technical features may be replaced with equivalents. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The electromagnetic repulsion coil is characterized by comprising an insulating plate (15), wherein an annular embedded groove (21) is formed in the insulating plate (15), and a coil (19) is fixedly arranged in the embedded groove (21); the electromagnetic repulsion coil further comprises a sealing cover (17), the sealing cover (17) is connected with the insulating plate (15) and/or the coil (19) to cover the end face of the coil (19), and the sealing cover (17) is used for buffering the impact of the metal disc (13) on the coil (19).
2. The electromagnetic repulsion coil according to claim 1, characterized in that the electromagnetic repulsion coil further comprises a fixing paste (18), said fixing paste (18) being filled between the inner caulking groove (21) and the coil (19) to fix the coil (19) in the inner caulking groove (21).
3. An electromagnetic repulsion coil according to claim 1 or 2, characterized in that the insulating plate (15) is fixed with an elastic buffer pad (16) on the side facing away from the embedded slot (21).
4. An electromagnetic repulsion coil in accordance with claim 3, characterized in that the outer peripheral surface of said elastic buffer pad (16) is grooved (20).
5. An electromagnetic repulsion coil in accordance with claim 4, characterized in that at least two of said grooves (20) are arranged at intervals, and the direction of the arrangement of the grooves (20) is the same as the direction of the arrangement of the insulation plate (15) and the elastic cushion pad (16).
6. An electromagnetic repulsion coil in accordance with claim 3, characterized in that said elastic buffer pad (16) is fixed on the insulating plate (15) by means of an adhesive of an insulating glue.
7. An electromagnetic repulsion coil in accordance with claim 3, characterized in that said elastic buffer pad (16) is a composite polyurethane buffer pad.
8. An electromagnetic repulsion coil, according to claim 1 or 2, characterized in that said insulating sheet (15) is an epoxy glass fiber insulating sheet.
9. Electromagnetic repulsion coil according to claim 1 or 2, characterized in that the exterior of said coil (19) is painted with an insulating paint layer.
10. The repulsion mechanism comprises a closing coil (12) and an opening coil (11) which are arranged at intervals, a metal disc (13) is arranged between the closing coil (12) and the opening coil (11), and a pull rod (14) is connected to the metal disc (13); characterized in that the closing coil (12) and the opening coil (11) are both electromagnetic repulsion coils according to any of the above claims 1 to 9.
CN202111599213.7A 2021-12-24 2021-12-24 Electromagnetic repulsion coil and repulsion mechanism Pending CN114664580A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111599213.7A CN114664580A (en) 2021-12-24 2021-12-24 Electromagnetic repulsion coil and repulsion mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111599213.7A CN114664580A (en) 2021-12-24 2021-12-24 Electromagnetic repulsion coil and repulsion mechanism

Publications (1)

Publication Number Publication Date
CN114664580A true CN114664580A (en) 2022-06-24

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020044036A1 (en) * 2000-10-16 2002-04-18 Hiroyuki Akita Switching device
JP2005216545A (en) * 2004-01-27 2005-08-11 Matsushita Electric Works Ltd Micro relay
KR20180109611A (en) * 2017-03-28 2018-10-08 엘에스산전 주식회사 High-speed switch
CN212587375U (en) * 2020-03-26 2021-02-23 平高集团有限公司 Spring operating mechanism and circuit breaker using same
CN113725035A (en) * 2021-08-17 2021-11-30 安徽合凯电气科技股份有限公司 Vortex repulsion mechanism
CN215160203U (en) * 2021-05-18 2021-12-14 重庆舜锦新材料科技有限公司 Cushion pad for lock hole plate of crane lifting appliance

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020044036A1 (en) * 2000-10-16 2002-04-18 Hiroyuki Akita Switching device
JP2005216545A (en) * 2004-01-27 2005-08-11 Matsushita Electric Works Ltd Micro relay
KR20180109611A (en) * 2017-03-28 2018-10-08 엘에스산전 주식회사 High-speed switch
CN212587375U (en) * 2020-03-26 2021-02-23 平高集团有限公司 Spring operating mechanism and circuit breaker using same
CN215160203U (en) * 2021-05-18 2021-12-14 重庆舜锦新材料科技有限公司 Cushion pad for lock hole plate of crane lifting appliance
CN113725035A (en) * 2021-08-17 2021-11-30 安徽合凯电气科技股份有限公司 Vortex repulsion mechanism

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