CN111605579A - Contact seat for electric switch machine - Google Patents
Contact seat for electric switch machine Download PDFInfo
- Publication number
- CN111605579A CN111605579A CN202010580446.1A CN202010580446A CN111605579A CN 111605579 A CN111605579 A CN 111605579A CN 202010580446 A CN202010580446 A CN 202010580446A CN 111605579 A CN111605579 A CN 111605579A
- Authority
- CN
- China
- Prior art keywords
- bracket
- adjusting plate
- movable contact
- contact
- shaft
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L5/00—Local operating mechanisms for points or track-mounted scotch-blocks; Visible or audible signals; Local operating mechanisms for visible or audible signals
- B61L5/06—Electric devices for operating points or scotch-blocks, e.g. using electromotive driving means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
- H01H3/38—Driving mechanisms, i.e. for transmitting driving force to the contacts using spring or other flexible shaft coupling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Seats For Vehicles (AREA)
- Contacts (AREA)
Abstract
The invention provides a contact base for an electric switch, which comprises a contact base body, a fixed plate and a support, wherein the fixed plate is used for assembling a static contact group; the bracket comprises a left bracket and a right bracket which are respectively connected to the contact base body in an axisymmetric manner through the movable contacts; a tension spring is arranged between the left bracket and the right bracket; two sides of the left bracket are respectively provided with a fixing plate corresponding to the position of the left bracket; the two sides of the right bracket are also respectively provided with a fixing plate corresponding to the positions of the two sides of the right bracket; one end of the movable contact point shaft is provided with an adjusting plate which can rotate relative to the contact point base body; and a tension spring is arranged between the right adjusting plate and the left adjusting plate. According to the contact base for the electric switch, the tension spring between the left adjusting plate and the right adjusting plate and the tension spring between the left bracket and the right bracket form a double tension spring system, so that the conversion power of the movable contact group is improved, and the conversion stability of the movable contact group is improved.
Description
Technical Field
The invention belongs to the technical field of railway turnout conversion equipment, and particularly relates to a contact base for an electric switch machine.
Background
The electric switch machine is used for switching and locking the point rail, changing the opening direction of the switch and reflecting the position state of the point rail through the contact. The contact seat is used as an important part in the point switch to realize the switching function of action and an indication circuit and feed back signals to an interlocking system, but the situation of overlarge conversion resistance exists under the influence of long-term friction between a movable contact group and a static contact group, so that after the turnout is converted in place, the blockage of the movable contact group cannot be normally converted and connected to indicate the fault of the circuit, and the normal running is delayed.
Disclosure of Invention
In view of the above, the present invention is directed to provide a contact base for an electric switch to reduce the switching resistance of a movable contact group of the contact base, improve the switching power of the movable contact group, ensure the switching stability of the movable contact group, and eliminate the hidden trouble of jamming.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a contact base for an electric switch comprises a contact base body, a fixed plate and a support, wherein the fixed plate is used for assembling a static contact group, and the support is used for assembling a movable contact group;
the bracket comprises a left bracket and a right bracket which are respectively connected to the contact base body in an axisymmetric manner through the movable contacts; a tension spring is arranged between the left bracket and the right bracket;
two sides of the left bracket are respectively provided with a fixing plate corresponding to the position of the left bracket; the two sides of the right bracket are also respectively provided with a fixing plate corresponding to the positions of the two sides of the right bracket;
one end of the movable contact point shaft is provided with an adjusting plate which can rotate relative to the contact point base body; and a tension spring is arranged between the right adjusting plate and the left adjusting plate.
The movable contact shaft and the left and right adjusting plates can be driven to rotate by driving the starting sheet to rotate, the left and right supports can be driven to rotate by the rotation of the adjusting plates, so that the position of a movable contact group on the support is moved, the connection and disconnection between a movable contact ring on the movable contact group and a static contact sheet on the static contact group are realized, and the switching between actions and an indicating circuit is realized. The driving mode provided by the invention is to drive the starting piece through external force, and can also drive the movable contact point shaft and the adjusting plate to rotate through other modes.
The left and right adjusting plates are provided with tension spring connecting holes, and after tension springs are installed, a double-tension spring system is formed by the tension springs between the left and right adjusting plates and the supports, so that stable and reliable conversion between the movable contact groups installed on the left and right supports and the static contact groups is guaranteed.
Furthermore, a flanging bush is arranged in a base body hole for assembling the movable contact shaft on the contact base body, and a cushion cover is arranged between the flanging bush and the movable contact shaft. The flanging lining is a graphite lining. The flanging bush realizes the coaxiality of the movable contact point shaft and the lubrication of the cushion cover.
Furthermore, the flanging bushing comprises a long flanging bushing and a short flanging bushing, the long flanging bushing is arranged in a base hole for assembling the middle position of the movable contact shaft, and a long cushion cover is arranged in the long flanging bushing; a long flanging lining is arranged in a base hole for assembling the adjusting plate and the movable contact point shaft, and a long cushion sleeve is not arranged in the long flanging lining;
the movable contact shaft is connected with the contact base body through a base body hole at one end without the adjusting plate, a short flanging bush is arranged in the base body hole, and a short cushion sleeve is arranged between the short flanging bush and the movable contact shaft.
Furthermore, the right adjusting plate and the left adjusting plate are respectively fixed with the tension spring through a pin shaft; the left support and the right support are fixed with the tension spring through a pin shaft respectively. The tension spring and the left and right adjusting plates and the tension spring and the left and right supports can also be connected in other modes and are connected through the pin shaft, so that the tension spring and the left and right supports are convenient to disassemble, but the tension spring and the left and right adjusting plates and the tension spring and the left and right supports are connected in other modes, and the realization of the application is not influenced.
Furthermore, the right adjusting plate is connected with a right starting sheet through an adjusting screw, the right starting sheet is riveted with an idler wheel through a pin shaft, and the right starting sheet is provided with a spline hole which corresponds to the spline shaft part of the movable contact shaft; the left adjusting plate is connected with a left starting sheet through an adjusting screw, the left starting sheet is riveted with an idler wheel through a pin shaft, and the left starting sheet is provided with a spline hole corresponding to the spline shaft part of the movable contact shaft.
The left starting sheet and the right starting sheet are provided with spline holes, penetrate through the movable contact point shaft which is the same as the spline shaft and are relatively static with the movable contact point shaft; the mounting hole (through hole) of the adjusting plate and the spline hole of the starting sheet are coaxial with the movable contact shaft, and the relative angle relationship between the mounting hole (through hole) of the adjusting plate and the spline hole of the starting sheet is adjusted through an adjusting screw of the adjusting plate.
The adjusting screw is provided with an elastic pad and a nut, and the position of the nut is adjusted to adjust the position relation between the adjusting plate and the starting sheet. The adjusting screw may be connected to the adjusting plate and the activating piece by a screw thread, and the position of the adjusting screw may be relatively fixed by other conventional methods in order to ensure structural stability after adjustment.
Further, mounting holes for matching the left support and the right support with the movable contact point shaft are through holes; the side surface of the left bracket corresponding to the left adjusting plate is provided with a groove which is matched with a boss on the left adjusting plate; the side surface of the right bracket corresponding to the right adjusting plate is provided with a groove which is matched with the boss on the right adjusting plate.
The movable contact point shaft penetrates through the through holes on the left bracket and the right bracket and is coaxial with the movable contact point shaft; the left and right brackets are coaxial with the through holes of the left and right adjusting plates, are matched with the bosses of the adjusting plates through the bracket grooves and are kept relatively static, and when the left and right starting pieces rotate, the left and right starting pieces drive the left and right adjusting plates to rotate through the adjusting screws of the left and right adjusting plates, so that the left and right brackets are driven to rotate, and connection or disconnection of contacts is realized.
Furthermore, a moving contact ring of the moving contact group is embedded with a uniformly distributed round point graphite lubricating layer. The current conductivity after the static contact group is driven into the static contact group is ensured, and meanwhile, the lubricating effect can be achieved, and the friction force between the static contact group and the static contact group is reduced.
Furthermore, the head of the static contact piece of the static contact group is in a circular arc shape. The occurrence of arcing can be improved while realizing reliable contact with the movable contact ring.
The invention also provides an electric switch machine, which comprises the contact base for the electric switch machine.
Compared with the prior art, the contact seat for the electric switch machine has the following advantages:
(1) when the left and right starting pieces rotate, the left and right starting pieces drive the left and right adjusting plates to rotate through the adjusting screws of the left and right adjusting plates, so that the left and right supports are driven to rotate, the position of a movable contact group on the supports is moved, the movable contact ring on the movable contact group is communicated with and disconnected from a static contact piece on the static contact group, the switching between action and an indicating circuit is realized, the switching is convenient, the contact seat is used for switching by adopting the rotation of a movable contact shaft, the smoothness of switching is ensured, and the obstacle that the normal switching cannot be realized due to blocking is prevented.
(2) According to the contact base for the electric switch, the tension spring between the left adjusting plate and the right adjusting plate and the tension spring between the left bracket and the right bracket form a double tension spring system, so that the conversion power of the movable contact group is improved, and the conversion stability of the movable contact group is improved.
(3) The contact base for the electric switch has the advantages that the long flanging lining and the short flanging lining which are arranged between the outer sides of the long cushion sleeve and the short cushion sleeve and the contact base body are provided with the graphite lubricating layers, so that the friction force between the long cushion sleeve and the short cushion sleeve and the contact base body can be reduced, and meanwhile, the flanging of the long flanging lining and the short flanging lining can play an axial positioning role in the contact base body to prevent the flanging from falling off.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a front view of a contact base for an electric switch according to an embodiment of the present invention;
fig. 2 is a top view of a contact base for an electric switch according to an embodiment of the present invention;
FIG. 3 is a partial view taken from the direction A of FIG. 2;
FIG. 4 is a side view of a set of movable contacts (graphite) according to an embodiment of the present invention;
FIG. 5 is a top view of a set of static contact points (arcs) according to an embodiment of the present invention;
FIG. 6 is a cross-sectional view of an embodiment of the present invention illustrating a turn-up bushing;
FIG. 7 is a cross-sectional view of a short turn-up bushing in accordance with an embodiment of the present invention
FIG. 8 is a front view of the left adjustment plate in an embodiment of the present invention;
FIG. 9 is a top view of a left adjustment plate according to an embodiment of the present invention;
FIG. 10 is a side view of a left adjustment plate according to an embodiment of the present invention;
FIG. 11 is a schematic view of the mating relationship of the interface members on the movable contact shaft according to the embodiment of the present invention;
fig. 12 is a front view of a contact base substrate according to an embodiment of the invention;
FIG. 13 is a schematic cross-sectional view A-A of FIG. 12;
fig. 14 is a side view of a stent according to an embodiment of the present invention.
Description of reference numerals:
1. a stationary contact group; 2. a movable contact group; 3. a long cushion cover; 4. a left actuating piece; 5. a movable contact point shaft; 6. a long flanging bushing; 7. a contact base substrate; 8. a right adjustment plate; 9. adjusting the screw; 10. a short cushion cover; 11. a short flanged bush; 12 a right bracket; 13. a pin shaft 14 and a fixing plate; 15. a tension spring; 16. a right actuating piece; 17. a left bracket; 18. a left adjustment plate; 19. a roller; 20. and a base hole.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1 to 14, a contact base for an electric switch comprises a contact base body 7, a fixed plate 14 for assembling a stationary contact group 1, and a bracket for assembling a movable contact group 2;
the bracket comprises a left bracket 17 and a right bracket 12 which are symmetrically connected to the contact base body 7 through the movable contact shaft 5 respectively; and a tension spring 15 is arranged between the left bracket 17 and the right bracket 12;
the two sides of the left bracket 17 are respectively provided with a fixing plate 14 corresponding to the position of the left bracket; the two sides of the right bracket 12 are also respectively provided with a fixing plate 14 corresponding to the positions of the two sides;
one end of the movable contact shaft 5, which is not connected with the contact base body 7, is provided with an adjusting plate which can rotate relative to the contact base body 7; and a tension spring 15 is arranged between the right adjusting plate 8 and the left adjusting plate 18.
A flanging bushing is arranged in a base hole 20 for assembling the movable contact shaft 5 on the contact base body 7, and a cushion cover is arranged between the flanging bushing and the movable contact shaft 5; the flanging lining is a graphite lining.
The flanging bush comprises a long flanging bush 6 and a short flanging bush 11, the long flanging bush 6 is arranged in a base body hole 20 for assembling the middle position of the movable contact shaft 5, and a long cushion cover 3 is arranged in the long flanging bush 6; a long flanging bush 6 is arranged in a base hole 20 for assembling the adjusting plate and the movable contact point shaft 5, and a long cushion sleeve 3 is not arranged in the long flanging bush 6;
the movable contact shaft 5 is connected with the contact base body 7 through the base body hole 20 at the end where the adjusting plate is not arranged, the short flanging bush 11 is arranged in the base body hole 20, and the short cushion sleeve 10 is arranged between the short flanging bush 11 and the movable contact shaft 5.
The right adjusting plate 8 and the left adjusting plate 18 are respectively fixed with the tension spring 15 through a pin shaft 13; the left bracket 17 and the right bracket 12 are also fixed with the tension spring 15 through a pin shaft 13 respectively.
The right adjusting plate 8 is connected with a right starting sheet 16 through an adjusting screw 9, the right starting sheet 16 is riveted with a roller 19 through a pin shaft, and the right starting sheet 16 is provided with a spline hole which corresponds to the spline shaft part of the movable contact shaft 5; the left adjusting plate 18 is connected with a left starting sheet 4 through an adjusting screw 9, the left starting sheet 4 is riveted with a roller 19 through a pin shaft, and the left starting sheet 4 is provided with a spline hole corresponding to the spline shaft part of the movable contact shaft 5.
The adjusting screw 9 is provided with an elastic pad and a nut, and the adjusting screw is used for adjusting the distance between the adjusting plate and the starting sheet and realizing the fixed connection of the adjusting plate and the starting sheet by adjusting the position of the nut.
The mounting holes of the left bracket 17 and the right bracket 12 which are matched with the movable contact point shaft 5 are through holes; and the corresponding side of the left bracket 17 and the left adjusting plate 18 is provided with a groove which is matched with the boss on the left adjusting plate 18; the right bracket 12 is provided with a groove on the side corresponding to the right adjusting plate 8, and the groove is matched with the boss on the right adjusting plate 8.
The movable contact ring of the movable contact group 2 is embedded with a uniformly distributed round point graphite lubricating layer.
The head of the static contact sheet of the static contact group 1 is in a circular arc shape.
The working process is as follows: the roller of one of the starting pieces climbs the slope on the action plate to rotate the starting piece, the starting piece drives the adjusting plate on the same side to rotate through the adjusting screw, the adjusting plate rotates to drive the bracket on the same side to rotate, the action circuit is switched on at the moment, the contact points are switched on in 1 and 4 rows, after the roller of the starting piece on the other side falls down from the action plate, the adjusting plate and the bracket can pull the adjusting plate on the other side to rotate with the bracket through the tension spring arranged on the adjusting plate, the circuit is switched on at the moment, and the contact points are switched on in 1, 3 rows or 2 and 4 rows (sequentially sequenced from one direction to the other direction).
The setting of adjusting plate is used for adjusting the depth of driving into of moving contact group. The left and right adjusting plates are provided with tension spring connecting holes, and a double tension spring system is formed by tension springs between the left and right adjusting plates and the supports after the tension springs are installed, so that stable and reliable conversion between the movable contact groups installed on the left and right supports and the static contact groups is guaranteed.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. A contact base for an electric switch machine, characterized in that: the device comprises a contact base body (7), a fixing plate (14) for assembling a static contact group (1) and a bracket for assembling a movable contact group (2);
the bracket comprises a left bracket (17) and a right bracket (12) which are symmetrically connected to the contact base body (7) through the movable contact shaft (5) respectively; a tension spring (15) is arranged between the left bracket (17) and the right bracket (12);
two sides of the left bracket (17) are respectively provided with a fixing plate (14) corresponding to the position of the left bracket; the two sides of the right bracket (12) are also respectively provided with a fixing plate (14) corresponding to the positions of the two sides;
one end of the movable contact point shaft (5) is provided with an adjusting plate which can rotate relative to the contact point base body (7); and a tension spring (15) is arranged between the right adjusting plate (8) and the left adjusting plate (18).
2. The contact base for an electric switch machine according to claim 1, wherein: a flanging bushing is arranged in a base hole (20) which is used for assembling the movable contact shaft (5) on the contact base body (7), and a cushion sleeve is arranged between the flanging bushing and the movable contact shaft (5); the flanging lining is a graphite lining.
3. The contact base for an electric switch machine according to claim 2, wherein: the flanging bushing comprises a long flanging bushing (6) and a short flanging bushing (11), the long flanging bushing (6) is arranged in a base body hole (20) used for assembling the middle position of the movable contact shaft (5), and a long cushion cover (3) is arranged in the long flanging bushing (6); a long flanging bush (6) is arranged in a base body hole (20) for assembling the adjusting plate and the movable contact point shaft (5), and a long cushion cover (3) is not arranged in the long flanging bush (6);
the movable contact shaft (5) is not provided with one end of the adjusting plate and is connected with the contact base body (7) through the base body hole (20), a short flanging bush (11) is arranged in the base body hole (20), and a short cushion sleeve (10) is arranged between the short flanging bush (11) and the movable contact shaft (5).
4. The contact base for an electric switch machine according to claim 1, wherein: the right adjusting plate (8) and the left adjusting plate (18) are respectively fixed with the tension spring (15) through a pin shaft (13); the left bracket (17) and the right bracket (12) are also fixed with the tension spring (15) through a pin shaft (13) respectively.
5. The contact base for an electric switch machine according to claim 1, wherein: the right adjusting plate (8) is connected with a right starting sheet (16) through an adjusting screw (9), the right starting sheet (16) is riveted with an idler wheel (19) through a pin shaft, and the right starting sheet (16) is provided with a spline hole which corresponds to a spline shaft part of the movable contact shaft (5); the left adjusting plate (18) is connected with a left starting sheet (4) through an adjusting screw (9), the left starting sheet (4) is riveted with an idler wheel (19) through a pin shaft, and the left starting sheet (4) is provided with a spline hole which corresponds to a spline shaft part of the movable contact shaft (5).
6. The contact base for an electric switch machine according to claim 1, wherein: mounting holes for matching the left bracket (17) and the right bracket (12) with the movable contact point shaft (5) are through holes; and the corresponding side surfaces of the left bracket (17) and the left adjusting plate (18) are provided with grooves which are matched with bosses on the left adjusting plate (18); the side surface of the right bracket (12) corresponding to the right adjusting plate (8) is provided with a groove which is matched with the lug boss on the right adjusting plate (8).
7. The contact base for an electric switch machine according to claim 1, wherein: the movable contact ring of the movable contact group (2) is embedded with uniformly distributed round point graphite lubricating layers.
8. The contact base for an electric switch machine according to claim 1, wherein: the head of the static contact piece of the static contact group (1) is in a circular arc shape.
9. An electric switch machine, characterized in that: comprising a contact base for an electric switch machine according to any of claims 1 to 8.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010580446.1A CN111605579A (en) | 2020-06-23 | 2020-06-23 | Contact seat for electric switch machine |
| PCT/CN2020/104719 WO2021258486A1 (en) | 2020-06-23 | 2020-07-27 | Contact seat for electric switch machine |
| RS20220603A RS20220603A1 (en) | 2020-06-23 | 2020-07-27 | Contact seat for electric switch machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010580446.1A CN111605579A (en) | 2020-06-23 | 2020-06-23 | Contact seat for electric switch machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111605579A true CN111605579A (en) | 2020-09-01 |
Family
ID=72205181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010580446.1A Pending CN111605579A (en) | 2020-06-23 | 2020-06-23 | Contact seat for electric switch machine |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN111605579A (en) |
| RS (1) | RS20220603A1 (en) |
| WO (1) | WO2021258486A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112550355A (en) * | 2020-12-20 | 2021-03-26 | 通号万全信号设备有限公司 | Stroke-adjustable contact base for point switch |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201737010U (en) * | 2010-07-29 | 2011-02-09 | 天津铁路信号工厂 | Quick-acting switch machine |
| CN203601302U (en) * | 2013-12-06 | 2014-05-21 | 北京中铁通电务技术开发有限公司 | Tramcar point switch |
| CN204210492U (en) * | 2014-11-27 | 2015-03-18 | 天津铁路信号有限责任公司 | The two bar switch machine switch circuit controller of a kind of double slip switch |
| KR102063122B1 (en) * | 2017-09-28 | 2020-01-07 | 주식회사 세화 | Brake for Point machine |
| CN207550219U (en) * | 2017-10-31 | 2018-06-29 | 西门子信号有限公司 | Driving mechanism, contact unit and the goat of the contact unit of goat |
| CN210734168U (en) * | 2019-09-19 | 2020-06-12 | 西门子信号有限公司 | Driving mechanism of contact assembly of switch machine, contact assembly and switch machine |
-
2020
- 2020-06-23 CN CN202010580446.1A patent/CN111605579A/en active Pending
- 2020-07-27 WO PCT/CN2020/104719 patent/WO2021258486A1/en active Application Filing
- 2020-07-27 RS RS20220603A patent/RS20220603A1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112550355A (en) * | 2020-12-20 | 2021-03-26 | 通号万全信号设备有限公司 | Stroke-adjustable contact base for point switch |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021258486A1 (en) | 2021-12-30 |
| RS20220603A1 (en) | 2022-08-31 |
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