CN115662852A - Electric transmission mechanism and circuit breaker - Google Patents
Electric transmission mechanism and circuit breaker Download PDFInfo
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- CN115662852A CN115662852A CN202211636885.5A CN202211636885A CN115662852A CN 115662852 A CN115662852 A CN 115662852A CN 202211636885 A CN202211636885 A CN 202211636885A CN 115662852 A CN115662852 A CN 115662852A
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Abstract
The invention provides an electric transmission mechanism and a circuit breaker, wherein the electric transmission mechanism comprises a base, a sliding chute, a motor, a spiral elastic piece and a first transmission rod; the chute is arranged on the base; the motor is arranged on the base, and a rotating shaft of the motor is arranged in parallel right in front of the sliding groove; the spiral elastic piece is arranged in parallel right in front of the sliding groove and is coaxially connected with the motor rotating shaft; one end of the first transmission rod penetrates through a gap between two adjacent spiral coils of the spiral elastic piece and then extends into the sliding chute, and the other end of the first transmission rod is used for transmission; the spiral elastic piece can rotate spirally under the driving of the motor and drives one end of the first transmission rod extending into the sliding groove to slide back and forth along the sliding groove. The electric transmission mechanism can not only transmit each part, but also effectively buffer the stress generated by the locked rotor motor born by other parts through the spiral elastic piece, and particularly can reduce the requirements on an internal limiting structure and control precision after the internal switching on/off brake is in place after being applied to a circuit breaker, thereby greatly improving the stability and the service life of the product.
Description
Technical Field
The invention belongs to the technical field of electric appliances, and particularly relates to an electric transmission mechanism and a circuit breaker.
Background
A circuit breaker is a mechanical switching device that can switch on, carry and break current under normal circuit conditions, and also switch on, carry current for a certain period of time and break current under specified abnormal conditions (e.g., short circuit conditions).
The intelligent circuit breaker has increased the detection on conventional mechanical circuit breaker's basis, thereby control module realizes the mechanical switch electrical apparatus of functions such as remote detection and control contact operating device switching on and off, remote control's drive often all adopts the motor in the industry at present, the electro-magnet drive, for guaranteeing that the automatic switching on and off of the contact operating device of circuit breaker reliably targets in place, most current factories are all through spacing (make motor stalling) or give certain time delay control through detecting after targetting in place in the structure inside, but this type of control all can be to inside limit structure intensity, there is certain influence in motor life-span. Taking the intelligent circuit breaker adopting the limiting structures such as the gear, the turbine-worm mechanism and the like in the current market as an example, after the contact operating mechanism is switched on under the driving of the motor, the motor driving can be stopped after the detection is carried out through various sensors, but due to the inertia problem, the motor can continue to provide power, so that internal parts must bear the stress generated by locked rotor, the requirement on the strength of the internal structural part is high, and the service life of the product is influenced to a certain extent.
Disclosure of Invention
In order to solve the above problems, an object of the present invention is to provide a novel electric transmission mechanism, which can reduce the requirements on an internal limiting structure and control precision after the internal opening/closing of the circuit breaker is in place, and greatly improve the stability and the service life of the product.
The purpose of the invention is realized by the following technical scheme:
an electric transmission mechanism comprises a base, a sliding chute, a motor, a spiral elastic piece and a first transmission rod, wherein the sliding chute, the motor, the spiral elastic piece and the first transmission rod are respectively positioned in the base; the sliding groove is arranged on the base; the motor is arranged on the base, and a rotating shaft of the motor is arranged in parallel right in front of the sliding groove; the spiral elastic pieces are arranged in parallel right in front of the sliding grooves and are coaxially connected with the motor rotating shaft; one end of the first transmission rod penetrates through a gap between two adjacent spiral coils of the spiral elastic piece, then extends into the sliding groove and can slide back and forth along the sliding groove, and the other end of the first transmission rod is a transmission end for transmission; wherein, spiral elastic component can rotate at motor drive down the spiral to drive the one end that first transfer line stretched into the spout and make a round trip to slide along the spout, spiral elastic component can the transmission, can also bear the produced stress of stifled commentaries on classics motor through compression buffering part.
Further, the spiral elastic member is a cylindrical compression spring with equal pitch.
Furthermore, the electric transmission mechanism also comprises a transmission wheel, an inner handle and a second transmission rod which are respectively arranged in the base; the driving wheel is an annular body which is rotatably arranged on the base, a first bump is arranged on the front wall of the driving wheel, and a hole which is used for being rotatably connected with the driving end of the first driving rod is also formed in the front wall of the driving wheel; the inner handle is rotatably arranged on the base through a pin shaft and coaxially sleeved in the driving wheel (can rotate in the driving wheel), and the front wall of the inner handle is provided with a convex rib which extends outwards from the outer edge of the inner handle and extends to the front side of the driving wheel; the convex rib corresponds to the position of the convex block and can drive the inner handle to rotate under the pushing of the convex block; one end of the second transmission rod is rotatably connected to the edge of the front side wall of the inner handle, and the other end of the second transmission rod is a transmission end for transmission.
Furthermore, a pin shaft in the middle of the inner handle is sleeved with a torsion spring with two torsion arms, the torsion spring is positioned between the rear wall of the inner handle and the base, one torsion arm is arranged on the rear wall of the inner handle, and the other torsion arm is arranged on the base; the torsion spring is used for resetting the inner handle.
A circuit breaker comprises a contact operating mechanism for driving a moving contact and a static contact of the circuit breaker to be switched on and off and the electric transmission mechanism, wherein a base of the electric transmission mechanism is integrally arranged in the circuit breaker; and the transmission end of the second transmission rod is in transmission connection with the contact operating mechanism.
Furthermore, the circuit breaker also comprises a tripping plate arranged between the contact operating mechanism and the driving wheel; the upper end of the tripping plate is rotatably arranged on the base, and the lower end of the tripping plate can rotate under the driving of the driving wheel and drive the contact operating mechanism to trip and open the brake.
Furthermore, a second bump is arranged on the rear side wall of the driving wheel and corresponds to the tripping plate in position, and the second bump can push the lower end of the tripping plate to rotate towards the direction of the contact operating mechanism under the driving of the driving wheel and drive the contact operating mechanism to trip and open the brake.
Further, the circuit breaker still includes reset spring, reset spring one end is installed on the base, and the other end is installed on the trip plate. The reset spring is used for resetting the tripping plate.
The transmission mechanism formed by combining the spiral elastic piece, the motor and the sliding groove can transmit each part, and can effectively buffer stress generated by the locked rotor motor born by other parts through the spiral elastic piece, so that the service life of the parts is greatly prolonged, particularly after the electric transmission mechanism is installed in a circuit breaker, the requirements on an internal limiting structure and control precision are reduced after the internal opening and closing of the circuit breaker are in place, and the stability and the service life of a product are greatly improved.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of the electric transmission mechanism and the circuit breaker according to the present invention;
fig. 2 is a schematic structural diagram of the circuit breaker in a closing state according to the present invention;
FIG. 3 is a schematic structural diagram of the circuit breaker of the present invention when it is about to open;
fig. 4 is a schematic structural diagram of the circuit breaker in an open state according to the present invention;
shown in the figure: 1-base, 1 a-chute, 2-motor, 3-spiral elastic piece, 4-first transmission rod, 5-transmission wheel, 5 a-lug I, 6-inner handle, 6 a-convex rib, 7-contact operating mechanism, 8-pin shaft, 9-second transmission rod, 10-trip plate and 11-reset spring.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
It should be understood that the structures, proportions, and dimensions shown in the drawings and described herein are for illustrative purposes only and are not intended to limit the scope of the present invention, which is defined by the claims, but rather by the claims. In addition, the terms such as "upper", "lower", "left", "right" and "middle" used in the present specification are for convenience of description only, and are not intended to limit the scope of the present invention, and changes or modifications of the relative relationship thereof may be regarded as the scope of the present invention without substantial changes in the technical contents.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
fig. 1 shows an electric transmission mechanism of this embodiment, which includes a base 1, and a chute 1a, a motor 2, a spiral elastic member 3, a first transmission rod 4, a transmission wheel 5, an inner handle 6, and a second transmission rod 9, which are respectively located in the base 1.
The base 1 serves as a mounting base which is integrally mounted in various devices to which the electric actuator according to the present embodiment is applied.
The chute 1a is mounted (transversely) on the base 1.
The motor 2 is installed on the base 1, and a rotating shaft of the motor 2 is arranged in parallel in front of the sliding groove 1a (the rotating shaft of the motor 2 and the sliding groove 1a are located on the same plane).
Spiral elastic component 3 is columniform constant pitch compression spring, and spiral elastic component 3 parallel arrangement is in the dead ahead of spout 1a, and its left end and 2 pivot coaxial couplings of motor, and spiral elastic component 3 can be driven at 2 pivots of motor and down axial rotation simultaneously.
One end (the right end is bent downwards) of the first transmission rod 4 penetrates through a gap between two adjacent spiral coils of the spiral elastic part 3 (the right side) and then extends into the sliding groove 1a and can slide back and forth along the sliding groove 1a, and the other end is a transmission end for transmission; the axis of the spiral elastic piece 3 intersects with the central line of one end of the first transmission rod 4 extending into the chute 1 a.
As shown in fig. 1-4, when the motor 2 rotates forward, the rotating shaft of the motor 2 drives the spiral elastic member 3 to rotate forward synchronously, the spiral elastic member 3 drives the right end of the first transmission rod 4 to translate leftward along the sliding slot 1a, and the transmission end of the first transmission rod 4 transfers power to other parts of the device while translating leftward, so that the other parts of the device act synchronously. When the motor 2 rotates reversely, the rotating shaft of the motor 2 drives the spiral elastic piece 3 to rotate reversely synchronously, the spiral elastic piece 3 drives the right end of the first transmission rod 4 to translate rightwards along the sliding groove 1a, and the transmission end of the first transmission rod 4 transfers power to other parts of the equipment while translating rightwards, so that the other parts of the equipment act synchronously. Whether the device rotates forwards or backwards, after the components of the device move in place, even if the motor 2 continues to rotate due to inertia, the spiral elastic piece 3 can effectively buffer the stress born by other components due to the rotation blockage of the motor 2 by compression.
Example 2:
the circuit breaker of the embodiment shown in fig. 1-4 comprises a contact operating mechanism 7 and an electric transmission mechanism for driving the dynamic and static contacts of the circuit breaker to be switched on and off.
The contact operating mechanism 7 adopts an operating mechanism of a conventional circuit breaker.
The electric transmission mechanism comprises a base 1, a chute 1a, a motor 2, a spiral elastic piece 3, a first transmission rod 4, a transmission wheel 5, an inner handle 6 and a second transmission rod 9, wherein the chutes, the motor 2, the spiral elastic piece 3, the first transmission rod, the second transmission rod and the second transmission rod are respectively positioned in the base 1.
The base 1 is integrated solid inside the circuit breaker (housing);
the chute 1a is mounted (transversely) on the base 1.
The motor 2 is installed on the base 1, and the rotating shaft of the motor 2 is arranged in parallel right in front of the sliding chute 1a (the rotating shaft of the motor 2 and the sliding chute 1a are located on the same plane).
The spiral elastic part 3 is a cylindrical compression spring with equal pitch, the spiral elastic part 3 is arranged in parallel right in front of the sliding groove 1a, and the left end of the spiral elastic part is coaxially connected with the rotating shaft of the motor 2. Spiral elastic component 3 can rotate at the spiral of motor 2 drive down to drive first drive lever 4 right-hand member (the one end that stretches into spout 1 a) and make a round trip to slide along spout 1a, spiral elastic component 3 can the transmission, can also through the stress that the compression buffering part bore because of stifled commentaries on classics motor and production.
One end (the right end is bent downwards) of the first transmission rod 4 penetrates through a gap between two adjacent spiral coils of the spiral elastic part 3 (the right side) and then extends into the sliding groove 1a and can slide back and forth along the sliding groove 1a, and the other end is a transmission end for transmission; the axis of the spiral elastic piece 3 is intersected with the central line of the right end of the first transmission rod 4 (the end of the first transmission rod 4 extending into the chute 1 a). The driving wheel 5 is an annular body rotatably arranged on the base 1, a first bump 5a is arranged on the front wall of the driving wheel, and a hole for being rotatably connected with the driving end of the first driving rod 4 is also formed in the front wall of the driving wheel (the driving end of the first driving rod 4 is rotatably arranged in the hole and is used for driving the driving wheel 5 to rotate).
The inner handle 6 is rotatably arranged on the base 1 through a pin shaft 8 and coaxially sleeved in the transmission wheel 5 (can rotate in the transmission wheel 5), and the inner handle 6 is mainly used for pushing the contact operating mechanism to be switched on; a convex rib 6a is fixed on the front wall of the inner handle 6, and the convex rib 6a extends out of the outer edge of the inner handle 6 and extends to the front side of the transmission wheel 5; the convex rib 6a corresponds to the convex block one 5a, as shown in fig. 4, when the driving wheel 5 is driven by the first driving rod 4 to rotate clockwise, the convex block one 5a rotates clockwise, and the convex block one 5a makes a certain angle to contact with the convex rib 6a and drive the convex rib 6a to rotate along with the convex rib, so as to drive the inner handle 6 to rotate. The driving wheel 5 is used for clockwise rotating to push the inner handle 6 to rotate through the matching of the convex rib 6a and the first convex block 5a, so that the inner handle 6 drives the contact operating mechanism to be switched on, and the driving wheel 5 is used for anticlockwise rotating to push the contact operating mechanism 7 to be switched off.
One end (lower end) of the second transmission rod 9 is rotatably connected in a hole (the hole and the convex rib 6a are respectively arranged at the left side and the right side of the front side wall of the inner handle 6) which is preset at the edge of the front side wall of the inner handle 6, the other end of the second transmission rod 9 is a transmission end for transmission, the transmission end of the second transmission rod 9 is in transmission connection with the contact operating mechanism 7 (in transmission connection with the trip buckle of the contact operating mechanism 7, so the second transmission rod 9 is also commonly called as a trip buckle pull rod), and the second transmission rod 9 can push the contact operating mechanism 7 to rotate and switch on.
When the circuit breaker needs to be changed from the closing state shown in fig. 2 to the opening state shown in fig. 4, as shown in fig. 2, the motor 2 rotates reversely, the rotating shaft of the motor 2 drives the spiral elastic member 3 to rotate synchronously reversely, the spiral elastic member 3 drives the right end of the first transmission rod 4 to translate rightwards along the chute 1a, while the first transmission rod 4 translates rightwards, the transmission end transmits power to the transmission wheel 5, so that the transmission wheel 5 rotates anticlockwise, after the transmission wheel 5 rotates anticlockwise by a certain angle, the lock catch of the contact operating mechanism 7 is struck (as shown in fig. 3), so that the lock catch and the trip are tripped, the contact operating mechanism 7 rotates clockwise and opens under the action of the main spring elasticity, and while the contact operating mechanism 7 rotates clockwise, the inner handle 6 is pushed by the second transmission rod 9 to rotate anticlockwise to the initial position (as shown in fig. 4). When the contact operating mechanism 7 acts in place, the motor 2 stops supplying power, the rotating shaft of the motor 2 continues to move due to inertia, power is continuously supplied, the spiral elastic part 3 is compressed, the spiral elastic part 3 buffers stress generated by rotation blockage, internal parts of the circuit breaker are protected, and the service life of the circuit breaker is prolonged.
When the circuit breaker needs to be changed from the opening state shown in fig. 4 to the closing state shown in fig. 2, as shown in fig. 4, the motor 2 rotates forward, the rotating shaft of the motor 2 drives the spiral elastic member 3 to rotate forward synchronously, the spiral elastic member 3 drives the right end of the first transmission rod 4 to translate left along the sliding chute, while the first transmission rod 4 translates left, the transmission end thereof transmits power to the transmission wheel 5, so that the transmission wheel 5 rotates clockwise, after the transmission wheel 5 rotates clockwise by a certain angle, the first bump 5a thereon contacts with the convex rib 6a and pushes the convex rib 6a on the inner handle 6 to rotate clockwise, so that the inner handle 6 rotates clockwise, and the inner handle 6 pushes the contact operating mechanism 7 to rotate counterclockwise to close (as shown in fig. 2) through the second transmission rod 9. When the contact operating mechanism 7 acts in place, the motor 2 stops supplying power, the rotating shaft of the motor 2 continues to move due to inertia, power is continuously supplied, the spiral elastic part 3 is compressed, the spiral elastic part 3 buffers stress generated by rotation blockage, internal parts of the circuit breaker are protected, and the service life of the circuit breaker is prolonged.
No matter the motor 2 rotates forwards or backwards, after the contact operating mechanism 7 acts in place, even if the motor 2 continues to rotate due to inertia, the spiral elastic piece 3 can effectively buffer the stress generated by the locked-rotor motor and born by each component of the circuit breaker by compression.
Example 3:
the present example differs from example 2 in that:
in order to ensure that the inner handle 6 can be reset quickly after the brake is opened, a torsion spring (not shown) with two torsion arms is sleeved on a pin shaft 8 in the middle of the inner handle 6, the torsion spring is positioned between the rear wall of the inner handle 6 and the base 1, one torsion arm is arranged on the rear wall of the inner handle 6, and the other torsion arm is arranged on the base 1. When the contact operating mechanism 7 is switched on, the inner handle 6 rotates clockwise and compresses the torsion spring; when the contact operating mechanism 7 trips and opens the brake, the inner handle 6 rapidly rotates anticlockwise to reset under the push of the main spring and the torsion spring of the contact operating mechanism 7, and the brake opening is completed.
Example 4:
this example differs from example 2 or 3 in that:
as shown in fig. 2, the structure of the transmission wheel 6 pushing the contact operating mechanism 7 to trip and open includes a trip plate 10, a second projection (not shown) and a cylinder arranged on the latch of the contact operating mechanism 7.
The trip plate 10 is arranged between the contact operating mechanism 7 and the transmission wheel 5; the upper end of the tripping plate 10 is rotatably arranged on the base 1, and the lower end of the tripping plate can rotate under the driving of the driving wheel 5 and drive the contact operating mechanism 7 to trip and open the brake.
The second bump is fixed on the rear side wall of the driving wheel 5 and corresponds to the position of the tripping plate 10, and the second bump can push the lower end of the tripping plate 10 to rotate towards the direction of the contact operating mechanism 7 under the driving of the driving wheel 5 and drive the contact operating mechanism 7 to trip and open.
The method specifically comprises the following steps: as shown in fig. 2, during opening, the motor 2 rotates reversely, the rotating shaft of the motor 2 drives the spiral elastic part 3 to rotate synchronously reversely, the spiral elastic part 3 drives the right end of the first transmission rod 4 to translate rightwards along the sliding groove, while the first transmission rod 4 translates rightwards, the transmission end of the first transmission rod transmits power to the transmission wheel 5, so that the transmission wheel 5 rotates anticlockwise, the transmission wheel 5 rotates anticlockwise to drive the second convex block on the transmission wheel to push the trip plate 10 to deflect towards the contact operating mechanism 7, the lower end of the trip plate 10 strikes a cylinder on the latch of the contact operating mechanism 7 to drive the latch to trip with the trip buckle, the contact operating mechanism 7 rotates clockwise to open under the action of the main spring force of the contact operating mechanism, and while the contact operating mechanism 7 rotates clockwise, the second transmission rod 9 pushes the inner handle 6 to rotate anticlockwise to an initial position.
Example 5:
this example differs from example 4 in that:
as shown in fig. 2, in order to ensure that the trip plate 10 can timely swing rightwards to reset when the breaker is switched on, the breaker further comprises a return spring 11, one end of the return spring 11 is installed on the base 1, and the other end of the return spring is installed on the trip plate 10. When the circuit breaker resets, drive wheel 5 clockwise rotation and drive lug two and keep away from trip plate 10, trip plate 10 no longer receives the hindrance, can swing right fast and reset under about reset spring 10 elasticity.
It is to be noted that the terms "comprises," "comprising," or any other variation thereof, 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.
The scope of the present invention is not limited to the technical solutions disclosed in the embodiments, and any modifications, equivalent substitutions, improvements, etc. made to the above embodiments according to the technical essence of the present invention fall within the scope of the present invention.
Claims (8)
1. An electric drive mechanism, includes the base, its characterized in that: the device also comprises a sliding chute, a motor, a spiral elastic piece and a first transmission rod which are respectively positioned in the base; the sliding groove is arranged on the base; the motor is arranged on the base, and a rotating shaft of the motor is arranged in parallel right in front of the sliding groove; the spiral elastic pieces are arranged in parallel right in front of the sliding grooves and are coaxially connected with the motor rotating shaft; one end of the first transmission rod penetrates through a gap between two adjacent spiral coils of the spiral elastic piece, then extends into the sliding groove and can slide back and forth along the sliding groove, and the other end of the first transmission rod is a transmission end for transmission; wherein, spiral elastic component can rotate at the motor drive spiral down to drive the one end that first transfer line stretched into the spout and make a round trip to slide along the spout.
2. The electric drive of claim, wherein: the spiral elastic piece is a cylindrical compression spring with equal pitch.
3. The electric drive of claim, wherein: the device also comprises a driving wheel, an inner handle and a second driving rod which are respectively arranged in the base;
the driving wheel is an annular body which is rotatably arranged on the base, a first bump is arranged on the front wall of the driving wheel, and a hole which is used for being rotatably connected with the driving end of the first driving rod is also formed in the front wall of the driving wheel;
the inner handle is rotatably arranged on the base through a pin shaft and coaxially sleeved in the driving wheel, a convex rib is arranged on the front wall of the inner handle, and the convex rib extends outwards out of the outer edge of the inner handle and extends to the front side of the driving wheel; the convex rib corresponds to the position of the convex block and can drive the inner handle to rotate under the pushing of the convex block;
one end of the second transmission rod is rotatably connected to the edge of the front side wall of the inner handle, and the other end of the second transmission rod is a transmission end for transmission.
4. The electric drive mechanism of claim 3, wherein: the round pin axle at inner handle middle part is overlapped and is equipped with the torsional spring of taking two torque arms, the torsional spring is located between inner handle back wall and the base, and one torque arm of it is installed on inner handle back wall, and another torque arm is installed on the base.
5. The utility model provides a circuit breaker, includes the contact operating device who is used for ordering about circuit breaker sound contact divide-shut brake, its characterized in that: the electric transmission mechanism of claim 3, wherein the base of the electric transmission mechanism is integrally disposed in the circuit breaker; and the transmission end of the second transmission rod is in transmission connection with the contact operating mechanism.
6. The circuit breaker of claim 5, wherein: the trip plate is arranged between the contact operating mechanism and the transmission wheel; the upper end of the tripping plate is rotatably arranged on the base, and the lower end of the tripping plate can rotate under the driving of the driving wheel and drive the contact operating mechanism to trip and open the brake.
7. The circuit breaker of claim 6, wherein: and a second bump is arranged on the rear side wall of the driving wheel, corresponds to the tripping plate in position, and can push the lower end of the tripping plate to rotate towards the direction of the contact operating mechanism under the driving of the driving wheel and drive the contact operating mechanism to trip and open the brake.
8. The circuit breaker of claim 6, wherein: still include reset spring, reset spring one end is installed on the base, and the other end is installed on the trip plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211636885.5A CN115662852A (en) | 2022-12-20 | 2022-12-20 | Electric transmission mechanism and circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211636885.5A CN115662852A (en) | 2022-12-20 | 2022-12-20 | Electric transmission mechanism and circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115662852A true CN115662852A (en) | 2023-01-31 |
Family
ID=85023018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211636885.5A Pending CN115662852A (en) | 2022-12-20 | 2022-12-20 | Electric transmission mechanism and circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115662852A (en) |
-
2022
- 2022-12-20 CN CN202211636885.5A patent/CN115662852A/en active Pending
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