CN216671513U - Contact assembly for clapper relay and clapper relay - Google Patents
Contact assembly for clapper relay and clapper relay Download PDFInfo
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- CN216671513U CN216671513U CN202123178986.6U CN202123178986U CN216671513U CN 216671513 U CN216671513 U CN 216671513U CN 202123178986 U CN202123178986 U CN 202123178986U CN 216671513 U CN216671513 U CN 216671513U
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Abstract
The utility model discloses a contact assembly for a clapper type relay and the clapper type relay. The contact assembly includes: the pair of static contacts are fixedly arranged opposite to the shell of the clapper type relay; a moving contact for electrically contacting a pair of stationary contacts; the armature is connected with the moving contact through the elastic component, so that the moving contact can move to a position of being contacted with or disconnected from the fixed contact under the driving of the armature; and a magnetically conductive member. The magnetic conduction piece comprises: the first magnetic conduction piece is fixedly arranged relative to the moving contact; and/or the second magnetic conduction piece is fixedly arranged relative to the shell of the clapper type relay, and the second magnetic conduction piece and the static contact of the static contact are arranged on the same side of the moving contact. In the utility model, when a circuit connected with the clapper type relay is short-circuited, the magnetic conduction piece is magnetized by short-circuit current, so that the magnetic conduction piece can generate suction force towards the fixed contact on the movable contact, the suction force can counteract the action of Hohm force, and the short-circuit current resistance of the clapper type relay is improved.
Description
Technical Field
The utility model relates to a contact assembly for a clapper relay and the clapper relay comprising the contact assembly.
Background
In the prior art, a clapper relay generally includes a pair of stationary contacts and a movable contact. A pair of fixed contacts are respectively provided with a convex fixed contact, and a movable contact is provided with two convex movable contacts. Two moving contacts on the moving contact are used for being electrically contacted with the fixed contacts on the pair of fixed contacts.
When a short circuit occurs in a circuit connected to the clapper relay, a very large current flows through the moving contact and the fixed contact, which generates a repulsive force that moves the moving contact in a direction separating from the fixed contact, and the repulsive force is generally called a "holm force". Once the moving contact and the static contact separate under the effect of the Hohm force, electric arcs can be generated, and the clapper type relay is burnt.
In order to resist short-circuit current, in the prior art, the following solutions are proposed:
(1) and (3) adding a contact pressure scheme: because the direction of the Homh force generated by the short-circuit current is opposite to that of the contact pressure, the Homh force generated by the short-circuit current can be increased when the contact pressure is increased, and the contact force is repelled, so that the capacity of resisting the short-circuit current is improved. However, the contact pressure rise has higher requirements on the electromagnetic system, and generally, the short-circuit current resistance which can be improved by the scheme is very limited.
(2) Two-contact scheme: the current is divided, the generated Homholtage can be obviously reduced, meanwhile, the parallel current between the moving contact and the static contact can provide suction to counteract partial Homholtage, the short-circuit resistance of a product is improved, the requirement on the planeness of the contacts is quite high in the scheme, the contact ablation of the two contacts cannot be completely consistent, and only a single contact can be contacted after the product works for a period of time.
(3) Parallel conductor scheme: the repulsion force generated between two parallel conductors is used for mutual compensation so as to achieve the purpose of improving the short-circuit current resistance. Generally, the structure can use reeds, the current bearing capacity is limited, and the structure is not suitable for large-current rated working conditions.
SUMMERY OF THE UTILITY MODEL
An object of the present invention is to solve at least one of the above problems and disadvantages in the prior art.
According to one aspect of the present invention, there is provided a contact assembly for a clapper relay, comprising: the fixed contacts are fixedly arranged relative to the shell of the clapper type relay; a movable contact for making electrical contact with the pair of stationary contacts; the armature is connected with the moving contact through an elastic component, so that the moving contact can move to a position of being in contact with or disconnected from the fixed contact under the driving of the armature; and a magnetically conductive member. The magnetic conduction piece includes: the first magnetic conduction piece is fixedly arranged relative to the moving contact; and/or the second magnetic conduction piece is fixedly arranged relative to the shell of the clapper type relay, and the second magnetic conduction piece and the static contact of the static contact are arranged on the same side of the moving contact.
According to an exemplary embodiment of the utility model, the movable contact comprises: a bridge portion having a bottom surface facing the stationary contact and a top surface facing away from the stationary contact; and two movable contacts formed on the bottom surface of the bridge portion and adapted to be in electrical contact with the two stationary contacts, respectively.
According to another exemplary embodiment of the utility model, the first magnetically permeable member is fixed on a top surface, a bottom surface or a side surface of the bridge portion.
According to another exemplary embodiment of the present invention, the second magnetic conductive member is fixed to one of the pair of stationary contacts; or the second magnetic conductive member is fixed to the housing of the clapper relay; or the second magnetic conduction piece is fixed on a coil framework of the clapper type relay.
According to another exemplary embodiment of the present invention, the second magnetically permeable member is fixed to or integrally formed with the magnetic core of the clapper relay.
According to another exemplary embodiment of the utility model, the second magnetic conductive member is disposed directly below the first magnetic conductive member and a bottom surface of the bridge portion.
According to another exemplary embodiment of the present invention, one end of the elastic component is fixed to the yoke of the clapper relay, and the other end of the elastic component is fixed to the armature of the clapper relay and the bridge portion of the movable contact, and the elastic component is adapted to reset the movable contact to an initial position when the coil of the clapper relay is powered off.
According to another exemplary embodiment of the present invention, the elastic member is an L-shaped elastic sheet, including: a first portion; and a second portion bent at a predetermined angle with respect to the first portion, a distal end portion of the first portion of the elastic member being fixed to a yoke of the clapper relay, a distal end portion of the second portion of the elastic member being fixed to a bridge portion of the movable contact, and a portion between a root portion and the distal end portion of the second portion of the elastic member being fixed to an armature of the clapper relay.
According to another exemplary embodiment of the present invention, each of the pair of stationary contacts has a connection terminal for electrical connection protruding to an outside of a housing of the clapper relay.
According to another exemplary embodiment of the present invention, the magnetic permeability of the magnetic conductive member is superior to that of the movable contact; and the conductivity of the moving contact is superior to that of the magnetic conduction piece.
According to another aspect of the present invention, there is provided a clapper relay including: a housing; an electromagnetic assembly mounted in the housing; and a contact assembly of the clapper relay mounted in the housing, the movable contact adapted to move between a closed position in electrical contact with the pair of stationary contacts and an open position electrically separated from the pair of stationary contacts, the electromagnetic assembly for providing an electromagnetic force to the armature to drive the movable contact to move from the closed position to the open position or from the open position to the closed position via the armature.
According to an exemplary embodiment of the utility model, the electromagnetic assembly comprises: a coil; a yoke disposed outside the coil; and a magnetic core disposed in the coil and having a lower end fixed to the yoke, the armature being disposed above an upper end of the magnetic core and movably connected to the yoke.
According to another exemplary embodiment of the present invention, the electromagnetic assembly further comprises a bobbin around which the coil is wound, the magnetic core being disposed in a central through hole of the bobbin.
According to another exemplary embodiment of the present invention, the clapper relay further comprises a limiting member disposed in the housing and fixed to the housing for limiting the movable contact at the open position.
According to another exemplary embodiment of the present invention, the stopper member includes: a limit plate fixed to the housing; and the elastic pad is arranged on the limiting plate and is used for elastically contacting with the moving contact.
According to another exemplary embodiment of the present invention, the housing comprises: a case having an opening; and a base plate installed on the opening of the case body, the pair of stationary contacts and the limiting member being fixed to the base plate.
In each of the foregoing exemplary embodiments according to the present invention, when a short circuit occurs in a circuit connected to the clapper type relay, the magnetic conductive member is magnetized by the short circuit current, so that the magnetic conductive member can generate a suction force on the moving contact toward the fixed contact, and the suction force can counteract the effect of the holm force, thereby improving the short circuit current resistance of the clapper type relay.
Other objects and advantages of the present invention will become apparent from the following description of the utility model which refers to the accompanying drawings, and may assist in a comprehensive understanding of the utility model.
Drawings
FIG. 1 shows a schematic perspective view of a clapper relay according to an exemplary embodiment of the present invention;
FIG. 2 illustrates a perspective view of the contact assembly and the electromagnetic assembly of the clapper relay of FIG. 1, as viewed from one side;
FIG. 3 shows a perspective view of the contact assembly and the electromagnetic assembly of the clapper relay of FIG. 1, viewed from the other side;
FIG. 4 shows a schematic view of a stop member of the clapper relay of FIG. 1;
fig. 5 is a schematic perspective view illustrating a substrate of the clapper relay shown in fig. 1, and a stationary contact, a second magnetic conductive member and a limiting component fixed on the substrate.
Detailed Description
The technical scheme of the utility model is further specifically described by the following embodiments and the accompanying drawings. In the specification, the same or similar reference numerals denote the same or similar components. The following description of the embodiments of the utility model with reference to the drawings is intended to illustrate the general inventive concept and should not be taken as limiting the utility model.
Furthermore, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in schematic form in order to simplify the drawing.
According to one general technical concept of the present invention, there is provided a contact assembly for a clapper relay, including: the fixed contacts are fixedly arranged relative to the shell of the clapper type relay; a movable contact for making electrical contact with the pair of stationary contacts; the armature is connected with the moving contact through an elastic component, so that the moving contact can move to a position of being in contact with or disconnected from the fixed contact under the driving of the armature; and a magnetically conductive member. The magnetic conduction piece includes: the first magnetic conduction piece is fixedly arranged relative to the moving contact; and/or the second magnetic conduction piece is fixedly arranged relative to the shell of the clapper type relay, and the second magnetic conduction piece and the static contact of the static contact are arranged on the same side of the moving contact.
FIG. 1 shows a schematic perspective view of a clapper relay according to an exemplary embodiment of the present invention; fig. 2 shows a perspective view of the contact assembly and the electromagnetic assembly 4 of the clapper relay shown in fig. 1, viewed from one side.
As shown in fig. 1 and 2, in the illustrated embodiment, the clapper relay mainly includes: a housing 100, an electromagnetic assembly 4 and a contact assembly (to be described later). The electromagnetic assembly 4 and the contact assembly are mounted in a housing 100.
As shown in fig. 1 and 2, in the illustrated embodiment, the contact assembly of the clapper relay includes: a pair of static contacts 10, a moving contact 20, an armature 43 and magnetic conductors 31, 32. The armature 43 is connected to the movable contact 20 through the elastic component 50, so that the movable contact 20 can move to a position of contacting or disconnecting with the fixed contact 10 under the driving of the armature 43.
As shown in fig. 1 and 2, in the illustrated embodiment, each of a pair of stationary contacts 10 has a stationary contact 11. The movable contacts 20 are used to electrically contact a pair of stationary contacts 10. The magnetic conductive members 31, 32 include a first magnetic conductive member 31 and/or a second magnetic conductive member 32. The first magnetic conductive member 31 is fixed to the movable contact 20. The second magnetic conductive member 32 is fixed to a stationary part in the clapper relay, and the second magnetic conductive member 32 and the stationary contact 11 are disposed on the same side (lower side in fig. 2) of the movable contact 20.
As shown in fig. 1 and 2, in the illustrated embodiment, the movable contact 20 is adapted to move between a closed position in electrical contact with a pair of stationary contacts 10 and an open position electrically separated from the pair of stationary contacts 10. In the illustrated embodiment, the electromagnetic assembly 4 is configured to provide an electromagnetic force to the armature 43 to drive the movable contact 20 to move from the open position to the closed position through the armature 43. However, the present invention is not limited to this, and for example, the movable contact 20 may be driven by the armature 43 to move from the closed position to the open position.
As shown in fig. 1 and 2, in the illustrated embodiment, the movable contact 20 includes: two movable contacts 21 and a bridge 22. Bridge 22 has a bottom surface facing stationary contact 11 and a top surface facing away from stationary contact 11. Two movable contacts 21 are formed on the bottom surface of the bridge portion 22, adapted to be in electrical contact with the two stationary contacts 11, respectively.
As shown in fig. 1 and 2, in the illustrated embodiment, the first magnetic conductive member 31 is fixed on the top surface of the bridge portion 22. However, the present invention is not limited to the illustrated embodiment, and for example, the first magnetic conductive member 31 may be fixed to the bottom surface or the side surface of the bridge portion 22.
As shown in fig. 1 and 2, in the illustrated embodiment, the second magnetically permeable member 32 is fixed to the case 100 of the clapper relay. However, the present invention is not limited to the illustrated embodiment, and the second magnetically permeable member 32 may be fixed to the bobbin 44 of the clapper relay, for example.
Although not shown, in another exemplary embodiment of the present invention, the second magnetically permeable member 32 may be fixed to the magnetic core 41 of the clapper relay. Since the magnetic core 41 and the second magnetic conductive member 32 can be made of the same magnetic material, in an exemplary embodiment of the present invention, the second magnetic conductive member 32 can be integrally formed with the magnetic core 41 of the clap relay, so that the installation and the use are very convenient.
Although not shown, in another exemplary embodiment of the present invention, the second magnetic conductive member 32 may be fixed to one of the pair of stationary contacts 10. Thus, the installation and the use are very convenient.
As shown in fig. 1 and 2, in the illustrated embodiment, the second magnetic conductive member 32 is disposed directly below the bottom surfaces of the first magnetic conductive member 31 and the bridge portion 22.
Fig. 3 shows a perspective view of the contact assembly and the electromagnetic assembly 4 of the clapper relay shown in fig. 1, viewed from the other side.
As shown in fig. 1 to 3, in the illustrated embodiment, the contact assembly further includes an elastic member 50, and one end of the elastic member 50 is fixed to the yoke 42 of the clapper relay and the other end is fixed to the armature 43 of the clapper relay and the bridge portion 22 of the movable contact 20. The elastic element 50 is suitable for restoring the movable contact 20 to the initial position when the coil 40 of the clapper relay is de-energized.
As shown in fig. 1 to 3, in the illustrated embodiment, the elastic member 50 is a spring, and the elastic member 50 is L-shaped. The elastic member 50 includes: a first portion 51 and a second portion 52. The second portion 52 is bent at a predetermined angle with respect to the first portion 51. The end portion of the first portion 51 of the elastic member 50 is fixed to the yoke 42 of the clapper relay. The end portion of the second portion 52 of the elastic member 50 is fixed to the bridge portion 22 of the movable contact 20, and a portion between the root portion and the end portion of the second portion 52 of the elastic member 50 is fixed to the armature 43 of the clapper relay.
As shown in fig. 1 to 3, in the illustrated embodiment, each of a pair of stationary contacts 10 has a connection terminal 12 for electrical connection protruding to the outside of a housing 100 of the slap-type relay.
As shown in fig. 1 to 3, in the illustrated embodiment, the magnetic permeability of the magnetic conductive members 31 and 32 is superior to that of the movable contact 20. The conductivity of the moving contact 20 is superior to that of the magnetic conductive members 31 and 32. Typically, the magnetically permeable members 31, 32 are made of, but not limited to, ferrite, and the movable contact 20 is made of, but not limited to, copper.
FIG. 4 shows a schematic view of a stop member 60 of the clapper relay of FIG. 1; fig. 5 is a schematic perspective view illustrating the substrate 120 of the clapper relay shown in fig. 1, and the stationary contact 10, the second magnetic conductive member 32 and the position limiting member 60 fixed on the substrate 120.
As shown in fig. 1 to 5, in the illustrated embodiment, the electromagnetic assembly 4 includes: a coil 40, a magnetic core 41, and a yoke 42. The yoke 42 is disposed outside the coil 40. The magnetic core 41 is disposed in the coil 40, and its lower end is fixed to the yoke 42. An armature 43 is disposed above the upper end of the core 41 and is movably connected to the yoke 42.
As shown in fig. 1-5, in the illustrated embodiment, the electromagnetic assembly 4 further includes a bobbin 44, the coil 40 being wound on the bobbin 44, and the magnetic core 41 being disposed in a central through hole of the bobbin 44.
As shown in fig. 1 to 5, in the illustrated embodiment, the clapper relay further includes a limiting member 60. The limiting member 60 is disposed in the housing 100 and fixed to the housing 100 for limiting the movable contact 20 at the open position.
As shown in fig. 1 to 5, in the illustrated embodiment, the stopper member 60 includes: a stopper plate 61 and an elastic pad 62. The stopper plate 61 is fixed to the housing 100. The elastic pad 62 is disposed on the stopper plate 61 and is used for elastically contacting with the movable contactor 20.
As shown in fig. 1 to 5, in the illustrated embodiment, the housing 100 includes: cartridge body 110 and substrate 120. The case 110 has an opening. The substrate 120 is mounted on the opening of the case 110. In the illustrated embodiment, the pair of stationary contacts 10, the second magnetic conductive member 32, and the position limiting member 60 are fixed to the substrate 120.
As shown in fig. 1 to 5, in the illustrated embodiment, the magnetic conductive members 31 and 32 include both the first magnetic conductive member 31 and the second magnetic conductive member 32. When a short circuit occurs in the circuit connected to the clapper relay, the first magnetic conductive member 31 and the second magnetic conductive member 32 are magnetized by the short-circuit current. At this time, the first magnetic conductive member 31 and the second magnetic conductive member 32 attract each other, so that an attraction force toward the stationary contact 10 can be generated on the movable contact 20, and the attraction force can cancel a holm force generated between the movable contact 21 and the stationary contact 11, thereby improving the short-circuit current resistance of the clapper relay.
Note that the present invention is not limited to the illustrated embodiment, and in another exemplary embodiment of the present invention, the magnetic conductive member may include only the first magnetic conductive member 31. When a short circuit occurs in the circuit connected to the clapper relay, the first magnetic conductive member 31 is magnetized by the short-circuit current. At this time, the first magnetic conductive member 31 is attracted by another magnetic conductive member (for example, the magnetic core 41 or the yoke 42) therebelow, so that an attraction force toward the fixed contact 10 is generated on the movable contact 20, and the attraction force can cancel the holm force generated between the movable contact 21 and the fixed contact 11, thereby improving the short-circuit current resistance of the clapper relay.
In another exemplary embodiment of the present invention, the magnetic conductive member may include only two magnetic conductive members 32. When the circuit connected with the clapper relay is short-circuited, the second magnetic conduction piece 32 is magnetized by short-circuit current. At this time, the second magnetic conductive member 31 can generate an attraction force on the movable contact 20 toward the stationary contact 10, and the attraction force can counteract a holm force generated between the movable contact 21 and the stationary contact 11, thereby improving the short-circuit current resistance of the clapper relay.
It will be appreciated by those skilled in the art that the above described embodiments are exemplary and can be modified by those skilled in the art, and that the structures described in the various embodiments can be freely combined without structural or conceptual conflicts, and that such modifications are intended to fall within the scope of the present invention.
Although the present invention has been described in connection with the accompanying drawings, the embodiments disclosed in the drawings are intended to be illustrative of preferred embodiments of the present invention and should not be construed as limiting the utility model.
Although a few embodiments of the present general inventive concept have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the general inventive concept, the scope of which is defined in the claims and their equivalents.
It should be noted that the word "comprising" does not exclude other elements or steps, and the words "a" or "an" do not exclude a plurality. Furthermore, any reference signs in the claims shall not be construed as limiting the scope of the utility model.
Claims (16)
1. A contact assembly for a clapper relay, comprising:
the fixed contacts are fixedly arranged relative to the shell of the clapper type relay;
a movable contact for making electrical contact with the pair of stationary contacts;
the armature is connected with the moving contact through an elastic component, so that the moving contact can move to a position of being in contact with or disconnected from the fixed contact under the driving of the armature; and
a magnetically permeable member, comprising:
the first magnetic conduction piece is fixedly arranged relative to the moving contact; and/or
And the second magnetic conduction piece is fixedly arranged relative to the shell of the clapper type relay, and the second magnetic conduction piece and the static contact of the static contact are arranged on the same side of the moving contact.
2. The contact assembly for a clapper relay of claim 1, wherein:
the moving contact comprises:
a bridge portion having a bottom surface facing the stationary contact and a top surface facing away from the stationary contact; and
and the two movable contacts are formed on the bottom surface of the bridging part and are suitable for being respectively in electric contact with the two fixed contacts.
3. The contact assembly for a clapper relay of claim 2, wherein:
the first magnetic conduction piece is fixed on the top surface, the bottom surface or the side surface of the bridging part.
4. The contact assembly for a clapper relay of claim 1, wherein:
the second magnetic conductive member is fixed to one of the pair of stationary contacts; or
The second magnetic conductive member is fixed to the housing of the clapper relay; or
The second magnetic conductive member is fixed to a bobbin of the clapper relay.
5. The contact assembly for a clapper relay of claim 1, wherein:
the second magnetic conductive member is fixed to or integrally formed with the magnetic core of the clapper relay.
6. The contact assembly for a clapper relay of claim 3, wherein:
the second magnetic conductive member is disposed directly below the first magnetic conductive member and a bottom surface of the bridge portion.
7. The contact assembly for a clapper relay of claim 2, wherein:
one end of the elastic component is fixed on the yoke of the clapper relay, the other end is fixed on the armature of the clapper relay and the bridge part of the movable contact,
the elastic component is suitable for resetting the moving contact to an initial position when the coil of the clapper type relay is powered off.
8. The contact assembly for a clapper relay of claim 7, wherein:
the elastic component is an L-shaped elastic sheet and comprises:
a first portion; and
a second portion bent at a predetermined angle with respect to the first portion,
the terminal portion of the first portion of the elastic member is fixed to the yoke of the clapper relay,
the terminal portion of the second portion of the elastic member is fixed to the bridge portion of the movable contact, and a portion between the root portion and the terminal portion of the second portion of the elastic member is fixed to the armature of the clapper relay.
9. The contact assembly for a clapper relay of claim 1, wherein:
each of the pair of stationary contacts has a connection terminal for electrical connection protruding to the outside of the housing of the slap-type relay.
10. The contact assembly for a clapper relay as in any of claims 1-9, wherein:
the magnetic conductivity of the magnetic conduction piece is superior to that of the moving contact; and is
The conductivity of the moving contact is superior to that of the magnetic conduction piece.
11. A clapper relay, comprising:
a housing;
an electromagnetic assembly mounted in the housing; and
the contact assembly of a clapper relay of any of claims 1-10 mounted in the housing,
the movable contact is adapted to move between a closed position in electrical contact with the pair of stationary contacts and an open position electrically separated from the pair of stationary contacts,
the electromagnetic assembly is used for providing electromagnetic force for the armature so as to drive the movable contact to move from the closed position to the open position or from the open position to the closed position through the armature.
12. The clapper relay of claim 11, wherein:
the electromagnetic assembly includes:
a coil;
a yoke disposed outside the coil; and
and a magnetic core disposed in the coil and having a lower end fixed to the yoke, the armature being disposed above an upper end of the magnetic core and movably connected to the yoke.
13. The clapper relay of claim 12, wherein:
the electromagnetic assembly further comprises a coil framework, the coil is wound on the coil framework, and the magnetic core is arranged in a central through hole of the coil framework.
14. The clapper relay of claim 11, further comprising:
and the limiting component is arranged in the shell and fixed on the shell and is used for limiting the movable contact at the opening position.
15. The clapper relay of claim 14, wherein:
the limiting part comprises:
a limit plate fixed to the housing; and
and the elastic pad is arranged on the limiting plate and is used for elastically contacting with the moving contact.
16. The clapper relay of claim 14, wherein:
the housing includes:
a case having an opening; and
a base plate installed on the opening of the case body,
the pair of stationary contacts and the stopper member are fixed to the base plate.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123178986.6U CN216671513U (en) | 2021-12-17 | 2021-12-17 | Contact assembly for clapper relay and clapper relay |
| JP2022199142A JP2023090676A (en) | 2021-12-17 | 2022-12-14 | Contact assembly and clapper-type relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123178986.6U CN216671513U (en) | 2021-12-17 | 2021-12-17 | Contact assembly for clapper relay and clapper relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216671513U true CN216671513U (en) | 2022-06-03 |
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ID=81796140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123178986.6U Active CN216671513U (en) | 2021-12-17 | 2021-12-17 | Contact assembly for clapper relay and clapper relay |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2023090676A (en) |
| CN (1) | CN216671513U (en) |
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2021
- 2021-12-17 CN CN202123178986.6U patent/CN216671513U/en active Active
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2022
- 2022-12-14 JP JP2022199142A patent/JP2023090676A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JP2023090676A (en) | 2023-06-29 |
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