Electric hinge

Abstract

Disclosed in the present invention is an electric hinge, comprising: a housing, a power unit mounted on the housing, an operation mode switching unit, an output unit, a power transmission unit, and an actuator unit, wherein the operation mode switching unit, the output unit, the power transmission unit and the actuator unit are linked. The power unit and the operation mode switching unit have a first state and a second state therebetween, wherein in the first state, the power unit is connected to the operation mode switching unit, and the power unit provides power to drive the operation mode switching unit and the output unit to operate, and then to drive the power transmission unit and the actuator unit, causing the actuator unit to operate electrically; and in the second state, the power unit and the operation mode switching unit are disconnected, and the actuator unit operates under an external force and reversely drives the power transmission unit, the output unit and the operation mode switching unit to operate. The electric hinge of the present invention can be controlled both electrically and manually, achieving a manual and automatic integrated function and meeting user requirements. When a power failure occurs in any state, the electric hinge can switch to manual control. Furthermore, in any state, the electric hinge can switch between electric control and manual control, without requiring resetting. The electric hinge can flexibly perform function switching and is more convenient to use.

Description

Electric hinge Technical Field

[0001] The present invention relates to the technical field of hinges, and more particularly to electric hinges. Background Art

[0002] There are many types of hinges, and the specific structure and type of hinge vary depending on the object. Currently, there are hinges for small appliances on the market, primarily used in microwave ovens and other household appliances. They provide a flexible connection between the body and door, allowing for rotational opening and closing. Traditional hinges are generally manually opened, but with the continuous development of intelligent home and kitchen equipment, hinges with electric opening and closing, suitable for small appliances, have begun to appear. Technical issues

[0003] The electric hinges in the existing technology are all opened and closed by electricity. If the power is cut off during use, the hinge will remain in the current state (half open or half closed) and will need to be reset after the next power is turned on. In addition, traditional electric hinges need to calculate the stroke. For example, if they are driven by a screw rod, the stroke of the screw rod needs to be calculated and the distance of the swing head needs to be judged before they can be opened and closed correctly. Therefore, even if there are hinges on the market that can be electric and manual, it is impossible to switch between manual and electric during the stroke. That is, when the swing head of the hinge is switching from the closed state to the expanded state, if it is opened by electric means, it cannot be switched to manual opening when it is opened to half of the state. It must be opened after the entire opening stroke action is completed. Switching; and in the process of switching the swing head of the hinge from the expanded state to the closed state, if it is closed electrically, it cannot be switched to manual closing when it is closed to the half state, and it must be switched after completing the entire closing stroke; similarly, if the swing head of the hinge is opened manually during the process of switching from the closed state to the expanded state, it cannot be switched to electric opening when it is opened to the half state, and it must be switched after completing the entire opening stroke; and in the process of switching the swing head of the hinge from the expanded state to the closed state, if it is closed manually, it cannot be switched to electric closing when it is closed to the half state, and it must be switched after completing the entire closing stroke.

[0004] Therefore, the electric hinge in the prior art is inconvenient to use, and the applicant proposes an electric hinge that can achieve manual and electric switching at any angle. Technical Solutions

[0005] In view of this, the present invention provides an electric hinge.

[0006] In order to achieve the above-mentioned object, the present invention adopts the following technical solution: an electric hinge comprises: a housing, a power unit mounted on the housing, an operation mode switching unit, an output unit, a power transmission unit and an execution unit, wherein the operation mode switching unit, the output unit, the power transmission unit and the execution unit are linked;

[0007] The power unit and the operation mode switching unit have a first state and a second state:

[0008] In the first state, the power unit is connected to the operation mode switching unit, the power unit provides power to drive the operation mode switching unit to operate, the operation mode switching unit drives the output unit to operate, and then drives the power transmission unit and the execution unit, so that the execution unit is electrically operated;

[0009] In the second state, the power unit and the operation mode switching unit are disconnected, the execution unit operates under external force, and drives the power transmission unit, the output unit and the operation mode switching unit to operate in reverse.

[0010] As a preferred solution of the present invention, the operation mode switching unit is a magnetic drive module;

[0011] The magnetic drive module includes: a bracket, a coil assembly, a return spring and a moving iron core;

[0012] The moving iron core is movably installed in the bracket and can be moved to a first position and a second position.

[0013] The coil group is energized to generate a magnetic field, and the moving iron core moves to the first position under the action of the magnetic force and connects to the power unit;

[0014] After the coil group is powered off, the moving iron core moves to the second position under the action of the return spring and is disconnected from the power unit;

[0015] The present invention generates a magnetic field by means of an energized coil to control the connection between the operation mode switching unit and the power unit, and has a simple control method and a stable connection.

[0016] As a preferred solution of the present invention, the power unit has a motor, and the motor has an output shaft; the moving iron core is plugged into the output shaft of the motor when in the first position; the present invention connects the moving iron core and the output shaft of the motor to realize that the power unit drives the operation mode switching unit and the output unit to operate, and finally realizes the electric operation of the execution unit; and after the moving iron core and the output shaft are disconnected, the execution unit can be manually operated to realize manual and automatic integration.

[0017] As a preferred solution of the present invention, the first end of the moving iron core is configured to be non-cylindrical, the output shaft of the motor is provided with a non-circular hole of matching shape, and the first end of the moving iron core can be inserted into the non-circular hole; or

[0018] The first end of the moving iron core is provided with a non-circular hole, and the output shaft of the motor is set to a non-cylindrical shape that matches the shape, and the output shaft of the motor can be inserted into the non-circular hole; here, the specific connection structure between the moving iron core and the output shaft is defined, and the structure is simple and compact.

[0019] As a preferred solution of the present invention, the coil group is installed in the bracket and wound around the circumference of the moving iron core, the two ends of the moving iron core extend out of the bracket, and the return spring is sleeved on the moving iron core. One end of the return spring is restricted to the outer bottom surface of the bracket, and the other end is restricted to the second end of the moving iron core; when the coil group is not energized, the force of the return spring keeps the moving iron core in the second position, away from the output shaft of the motor, and the execution unit can be operated manually.

[0020] As a preferred solution of the present invention, the output unit is a screw rotation module, comprising: an output frame, a screw rotatably mounted on the output frame, and a slider assembled on the screw;

[0021] The movable iron core is connected to the screw rod in both the first position and the second position, and the movable iron core and the screw rod rotate synchronously;

[0022] The slider is installed on the screw and limited by the output frame. The curved motion of the screw is converted into the linear motion of the slider.

[0023] Here, the specific structure of the output unit is defined, and the execution unit is driven to operate through the forward and reverse rotation of the screw rod.

[0024] As a preferred solution of the present invention, between the movable iron core and the lead screw, one of them is provided with a non-circular socket, and the other is provided with a non-circular insertion portion, so that the two can be rotatably connected;

[0025] The depth of the insertion hole is greater than the travel distance of the moving iron core when switching between the first position and the second position.

[0026] As a preferred solution of the present invention, ball bearings are provided at both ends of the screw rod, and the output frame is correspondingly provided with a fixing flange.

[0027] As a preferred solution of the present invention, the output shaft, the moving iron core and the lead screw of the motor are coaxially arranged.

[0028] As a preferred solution of the present invention, the power transmission unit includes: a connecting rod, an inner bracket and a tension spring, one end of the connecting rod is connected to the slider, the other end of the connecting rod and the tension spring are connected to the upper end of the inner bracket through a pin, and the lower end of the inner bracket is connected to the execution unit. Beneficial effects

[0029] As can be seen from the above technical solutions, compared with the prior art, the present invention has the following beneficial technical effects: after the power unit and the operation mode switching unit are connected, the execution unit is controlled to operate electrically, and after the power unit and the operation mode switching unit are disconnected, the execution unit is controlled to operate manually, thereby realizing manual and automatic integration;

[0030] The hinge of the present invention can realize switching between manual and electric modes at any stroke. After power failure during operation, the connection between the moving iron core and the output shaft of the motor is immediately disconnected, and the user can manually push the execution unit to continue running. If power is turned on again, the moving iron core and the output shaft of the motor are connected again, and the movement of the execution unit can be controlled again by electric means. It is not affected by the position of the execution unit and the movement stroke of the lead screw, and switching between manual mode and electric mode can be performed at any position. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0032] FIG1 is a schematic diagram of the electric hinge of the present invention in a closed state;

[0033] FIG2 is a schematic diagram of the electric hinge of the present invention in a semi-open (closed) state;

[0034] FIG3 is a schematic diagram of the electric hinge of the present invention in an unfolded state;

[0035] FIG4 is an exploded view of the electric hinge of the present invention;

[0036] FIG5 is a schematic structural diagram of a power unit, an operation mode switching unit, and an output unit in an electric hinge of the present invention;

[0037] FIG6 is an exploded view of the power unit, the operation mode switching unit and the output unit in the electric hinge of the present invention;

[0038] FIG7 is a schematic diagram of the electric hinge of the present invention in a closed state in electric mode;

[0039] FIG8 is a schematic diagram of the electric hinge of the present invention in the unfolded state in the electric mode;

[0040] FIG9 is a schematic diagram of the electric hinge of the present invention in a closed state in manual mode;

[0041] FIG10 is a schematic diagram of the electric hinge of the present invention in the unfolded state in the manual mode.

[0042] Description of reference numerals:

[0043] . Specific embodiments of the present invention

[0044] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0045] The electric hinge, as shown in FIG1-10 , includes: a housing 00 , a power unit 100 mounted on the housing 00 , an operating mode switching unit 210 , an output unit 220 , a power transmission unit 300 , and an execution unit 400 . The operating mode switching unit 210 , the output unit 220 , the power transmission unit 300 , and the execution unit 400 are linked together.

[0046] The power unit 100 and the operation mode switching unit 210 have a first state and a second state:

[0047] In the first state, the power unit 100 is connected to the operation mode switching unit 210. The power unit 100 provides power to drive the operation mode switching unit 210 to operate. The operation mode switching unit 210 drives the output unit 220 to operate, and then drives the power transmission unit 300 and the execution unit 400, so that the execution unit 400 is electrically operated.

[0048] In the second state, the power unit 100 and the operation mode switching unit 210 are disconnected, the execution unit 400 operates under external force, and drives the power transmission unit 300, the output unit 220 and the operation mode switching unit 210 to operate in reverse.

[0049] Specifically, the housing 00 can be designed into any structure, and mainly serves as a carrier. The power unit 100, the operation mode switching unit 210, the output unit 220, the power transmission unit 300, and the execution unit 400 are all installed in the housing 00 as a whole. As shown in FIG4 , the housing 00 is a semi-enclosed long strip, and can be made of a high-hardness metal material.

[0050] The power unit 100 is installed at one end of the housing 00, and can be located inside the housing 00 or outside the housing 00. The power unit 100 has a motor 110, and the motor 110 has an output shaft 111. The motor 110 is a forward and reverse motor, which can achieve forward rotation and reverse rotation.

[0051] As shown in FIG5 and FIG6 , the operation mode switching unit 210 is a magnetic drive module;

[0052] The operation mode switching unit 210 includes: a bracket 211, a coil assembly 212, a return spring 213 and a moving iron core 214;

[0053] The moving iron core 214 is movably installed in the bracket 211, and the moving iron core 214 can move to a first position and a second position.

[0054] The coil assembly 212 is energized to generate a magnetic field, and the moving iron core 214 moves to the first position under the action of the magnetic force and connects to the power unit 100;

[0055] After the coil assembly 212 is powered off, the movable iron core 214 moves to the second position under the action of the return spring 213 and is disconnected from the power unit 100;

[0056] The power unit 100 and the operation mode switching unit 210 are installed in a frame 01, and the frame 01 is fixedly installed on the upper end of the shell 00. The power unit 100 is located outside the shell 00, and the operation mode switching unit 210 is located inside the shell 00. Optionally, depending on the shape of the shell 00, the power unit 100 and the operation mode switching unit 210 can be located outside the shell 00 at the same time, or can be located inside the shell 00 at the same time.

[0057] The coil assembly 212 is not energized and does not generate a magnetic field. The movable iron core 214 moves away from the output shaft 111 under the force of the return spring 213. The power unit 100 and the operation mode switching unit 210 are disconnected. The user can manually apply force to push the actuator unit 400 to operate, thereby operating the power transmission unit 300 and the operation mode switching unit 210. The operation mode switching unit 210 drives the output unit 220 to operate.

[0058] After the coil group 212 is energized, the coil group 212 generates a magnetic field. Under the action of the magnetic force, the moving iron core 214 overcomes the elastic force of the return spring 213 and moves toward the output shaft 111, and is plugged into the output shaft 111. After plugging, when the motor 110 runs, the output shaft 111 drives the moving iron core 214 to rotate, thereby controlling the operation of the power transmission unit 300 and the execution unit 400.

[0059] The magnetic force generated by the coil assembly 212 after being energized must be greater than the elastic force of the return spring 213 . When the moving iron core 214 is connected to the output shaft 111 , the return spring 213 is compressed.

[0060] Furthermore, the movable iron core is plugged into the output shaft of the motor when in the first position, which can be in the following form: the first end of the movable iron core 214 is set to a non-cylindrical shape, the output shaft 111 of the motor 110 is provided with a non-circular hole of matching shape, and the first end of the movable iron core 214 can be inserted into the non-circular hole; or

[0061] The first end of the moving iron core 214 is provided with a non-circular hole, and the output shaft 111 of the motor 110 is provided with a non-cylindrical shape that matches the shape, and the output shaft 111 of the motor 110 can be inserted into the non-circular hole.

[0062] The movable iron core 214 and the output shaft 111 are directly connected. Of course, an indirect connection method can also be used, such as providing upper and lower connectors with teeth between the first end of the movable iron core 214 and the output shaft 111 for connection; or providing a gear between the first end of the movable iron core 214 and the output shaft 111 for connection through a gear.

[0063] However, direct plug-in is the simplest method, reduces assembly steps and is low-cost.

[0064] Furthermore, the coil group 212 is installed in the bracket 211 and wound around the circumference of the moving iron core 214. Both ends of the moving iron core 214 extend out of the bracket 211. The return spring 213 is sleeved on the moving iron core 214. One end of the return spring 213 is restricted to the outer bottom surface of the bracket 211, and the other end is restricted to the second end of the moving iron core 214.

[0065] As shown in Figure 7, the moving iron core 214 has an upper end, a middle part and a lower end. The upper end has the smallest diameter and the lower end has the largest diameter. The intersection between the upper end and the middle part forms a conical surface, which can prevent the moving iron core 214 from detaching upward from the bracket 211. A channel for assembling the moving iron core 214 is also defined inside the bracket 211; the coil group 212 is wound around the outside of the moving iron core 214, which is simply shown by the black shadow block in Figure 7. The moving iron core 214 can move up and down under the action of the magnetic force and the force of the return spring 313.

[0066] In one embodiment, as shown in FIG4 , the output unit 220 is a screw rotation module, comprising: an output frame 221 , a screw 222 rotatably mounted on the output frame 221 , and a slider 223 assembled on the screw 222 ;

[0067] The movable iron core 214 is connected to the screw rod 222 in both the first position and the second position, and the movable iron core 214 and the screw rod 222 rotate synchronously;

[0068] The slider 223 is mounted on the screw rod 222 and is limited by the output frame 221. The curved motion of the screw rod 222 is converted into the linear motion of the slider 223.

[0069] Please refer to Figures 5-6. The output frame 221 is fixedly installed inside the shell 00, the screw rod 222 is installed on the output frame 221, and the upper end of the screw rod 222 is plugged into the moving iron core 214. The screw rod 222 can rotate forward and reverse under the drive of the moving iron core 214; the slider 223 is rectangular, the output frame 221 is provided with a linear groove 2211, the screw rod 222 is assembled in the linear groove 2211, a group of side surfaces of the slider 223 correspond to the inner wall of the linear groove 2211, and the linear groove 2211 limits the slider 223 to move only along the linear groove 2211, and cannot rotate.

[0070] Furthermore, between the movable iron core 214 and the screw rod 222, one is provided with a non-circular socket, and the other is provided with a non-circular insertion portion, so that the two can be rotatably connected;

[0071] The depth of the insertion hole is greater than the travel distance of the moving iron core when switching between the first position and the second position.

[0072] As shown in Figure 7, Figure 7 is the manual mode. At this time, the upper end of the moving iron core 214 is separated from the output shaft 111, and the upper end of the screw rod 222 completely enters the socket at the lower end of the moving iron core 214. At this time, manual force can be applied to push the execution unit 400 to rotate clockwise and expand. When the execution unit 400 is running, it drives the power transmission unit 300, the output unit 220 and the operation mode switching unit 210 to run in the reverse direction.

[0073] As shown in Figure 9, Figure 9 is the electric mode. At this time, the upper end of the moving iron core 214 is connected to the output shaft 111, and the upper end of the screw rod 222 partially enters the socket at the lower end of the moving iron core 214. At this time, the motor 110 is started, and the output shaft 111 drives the moving iron core 214 to rotate, and then the transmission screw rod 222 rotates. The screw rod 222 rotates until the slider 223 moves downward, pushing the power transmission unit 300 to move downward, and the execution unit 400 rotates clockwise to expand.

[0074] In one embodiment, ball bearings 224 are provided at both ends of the screw rod 222 , and a fixing flange 225 is correspondingly provided on the output frame 221 . During installation, the ball bearings 224 at both ends of the screw rod 222 are fixed to the fixing flange 225 .

[0075] Furthermore, the output shaft 111 of the motor 110 , the moving iron core 214 and the lead screw 222 are coaxially arranged.

[0076] In one embodiment, the power transmission unit 300 includes: a connecting rod 310, an inner bracket 320 and a tension spring 330, one end of the connecting rod 310 is connected to the slider 223, the other end of the connecting rod 310 and the tension spring 330 are connected to the upper end of the inner bracket 320 through a pin, and the lower end of the inner bracket 320 is connected to the execution unit 400.

[0077] Specifically, as shown in FIG1-3 , the execution unit 400 is formed by pressing a metal material into a sheet shape, and has the characteristics of high hardness and high strength. The execution unit 400 is in the form of a thin sheet and has no limitation on shape;

[0078] One end of the actuator 400 is rotatably connected to the outer housing 00. An arcuate slot 410 is defined on the actuator 400. The lower end of the inner bracket 320 is connected to the arcuate slot 410 of the actuator 400 via a pin. The middle portion of the inner bracket 320 is connected to the strip slot defined in the outer housing 00 via a pin and a roller. The upper end of the inner bracket 320 is connected to the tension spring 330 and the lower end of the connecting rod 310. The upper end of the connecting rod 310 is connected to the slider 223.

[0079] The use of the invention is further described below:

[0080] The electric hinge of the present invention has a manual mode and an electric mode:

[0081] In manual mode:

[0082] As shown in FIG7 , the upper end of the movable iron core 214 is separated from the output shaft 111, and the upper end of the screw rod 222 is completely inserted into the socket at the lower end of the movable iron core 214 . Manual force is applied to push the actuator 400 to rotate clockwise and expand. The actuator 400 drives the inner bracket 320 to move downward, and then pulls the connecting rod 310 downward. The slider 223 moves downward along the screw rod 222, and the screw rod 222 rotates clockwise. The actuator 400 is expanded as shown in FIG8 .

[0083] As shown in FIG8 , manually applying force pushes the execution unit 400 to rotate counterclockwise to close, the execution unit 400 drives the inner bracket 320 to move upward, and then pulls the connecting rod 310 to move upward, the slider 223 moves upward along the screw rod 222, and the screw rod 222 rotates counterclockwise; the execution unit 400 is closed as shown in FIG7 ;

[0084] In electric mode:

[0085] As shown in FIG9 , the upper end of the movable iron core 214 is connected to the output shaft 111, and the upper end of the screw rod 222 partially enters the socket at the lower end of the movable iron core 214. The motor 210 starts and rotates forward, and the output shaft 111 drives the movable iron core 214 to rotate, and then the transmission screw rod 222 rotates forward, and the slider 223 moves downward along the screw rod 222, pushing the connecting rod 310 and the inner bracket 320 to move downward, and then the actuator 400 rotates clockwise to expand. The actuator 400 after expansion is shown in FIG10 ;

[0086] As shown in FIG10 , the motor 110 starts and rotates in the reverse direction, the output shaft 111 drives the moving iron core 214 to rotate, and then the transmission screw 222 rotates in the reverse direction, the slider 223 moves upward along the screw 222, pushing the connecting rod 310 and the inner bracket 320 to move upward, and then the actuator 400 rotates counterclockwise to close. After the actuator 400 is closed, it is shown in FIG9 ;

[0087] The electric hinge of the present invention can realize switching between manual mode and electric mode in any stroke. As shown in FIG2 , at this time, the execution unit 400 is approximately in a semi-open state. If it is in manual mode at this time, the coil group 212 is energized to generate a magnetic field, causing the moving iron core 214 to move up and connect to the output shaft 111, and the motor 110 runs, thereby converting the execution unit 400 to the electric mode and continuing to operate; if it is in the electric mode in FIG2 , then when the power is cut off, the coil group 212 is disconnected and the electromagnetic field disappears, causing the moving iron core 214 to move downward and separate from the output shaft 111 under the action of the reset spring 213, and the user can manually continue to push the execution unit 400 to operate.

[0088] Furthermore, the motor 110 of the present invention is provided with a stall current threshold. When the load of the execution unit 400 is so great that the current value of the motor 110 is greater than the stall current threshold, the program controls the power to be cut off and automatically switches to manual mode. More specifically, when the electric hinge is used in an oven, the execution unit 400 is connected to the oven door. During the opening and closing process in electric mode, if the oven door encounters an obstacle, such as the user's hand or other objects blocking it and cannot be opened and closed smoothly, the load of the execution unit 400 increases due to the obstacle, so that the current value of the motor 110 is greater than the stall current threshold. The program controls the power to be cut off and automatically switches to manual mode, effectively preventing objects from being damaged or injuring users, or the oven door from continuing to open and close rigidly and damaging the electric hinge / oven door.

[0089] In electric mode, when the oven door is opened to the maximum angle, the execution unit 400 cannot continue to rotate to open, the load of the motor 110 increases, the current value of the motor 110 is greater than the stall current threshold, the program controls the power to be cut off, and the opening is completed; when the oven door is closed, the execution unit 400 cannot continue to rotate to close, the load of the motor 110 increases, the current value of the motor 110 is greater than the stall current threshold, the program controls the power to be cut off, and the closing is completed.

[0090] The electric hinge of the present invention can be electrically controlled and manually controlled to realize the manual-automatic integrated function to meet user needs. In the event of a power outage in any state, it can be switched to manual control, and in any state, electric and manual switching can be achieved without resetting. The function switching is flexible and more convenient to use.

[0091] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. Electric hinge, characterized by: include: A housing, a power unit mounted on the housing, an operation mode switching unit, an output unit, a power transmission unit, and an execution unit, wherein the operation mode switching unit, the output unit, the power transmission unit, and the execution unit are linked; The power unit and the operation mode switching unit have a first state and a second state: In the first state, the power unit is connected to the operation mode switching unit, the power unit provides power to drive the operation mode switching unit to operate, the operation mode switching unit drives the output unit to operate, and then drives the power transmission unit and the execution unit, so that the execution unit is electrically operated; In the second state, the power unit and the operation mode switching unit are disconnected, the execution unit operates under external force, and drives the power transmission unit, the output unit and the operation mode switching unit to operate in reverse.

2. The electric hinge according to claim 1, characterized in that: The operation mode switching unit is a magnetic drive module; The magnetic drive module includes: a bracket, a coil assembly, a return spring and a moving iron core; The moving iron core is movably installed in the bracket and can be moved to a first position and a second position. The coil group is energized to generate a magnetic field, and the moving iron core moves to the first position under the action of the magnetic force and connects to the power unit; After the coil group is powered off, the moving iron core moves to the second position under the action of the return spring and is disconnected from the power unit.

3. The electric hinge according to claim 2, characterized in that: The power unit comprises a motor, and the motor comprises an output shaft; the moving iron core is plugged into the output shaft of the motor when in the first position.

4. The electric hinge according to claim 3, characterized in that: The first end of the moving iron core is configured to be non-cylindrical, and the output shaft of the motor is provided with a non-circular hole of matching shape, and the first end of the moving iron core can be inserted into the non-circular hole; or The first end of the moving iron core is provided with a non-circular hole, and the output shaft of the motor is provided with a non-cylindrical shape that matches the shape, and the output shaft of the motor can be inserted into the non-circular hole.

5. The electric hinge according to claim 3, characterized in that: The coil group is installed in the bracket and wound around the circumference of the moving iron core. Both ends of the moving iron core extend out of the bracket. The return spring is sleeved on the moving iron core. One end of the return spring is restricted to the outer bottom surface of the bracket, and the other end is restricted to the second end of the moving iron core.

6. The electric hinge according to claim 2, characterized in that: The output unit is a screw rotation module, comprising: an output frame, a screw rotatably mounted on the output frame, and a slider assembled on the screw; The movable iron core is connected to the screw rod in both the first position and the second position, and the movable iron core and the screw rod rotate synchronously; The slider is installed on the screw rod and limited by the output frame. The curved motion of the screw rod is converted into linear motion of the slider.

7. The electric hinge according to claim 6, characterized in that: Between the moving iron core and the lead screw, one is provided with a non-circular socket and the other is provided with a non-circular insertion portion, so that the two can be rotatably connected; the depth of the socket is greater than the travel distance of the moving iron core switching between the first position and the second position.

8. The electric hinge according to claim 7, characterized in that: Ball bearings are provided at both ends of the screw rod, and a fixing flange is provided correspondingly on the output frame.

9. The electric hinge according to claim 7, characterized in that: The output shaft, the moving iron core and the lead screw of the motor are coaxially arranged.

10. The electric hinge according to claim 2, characterized in that: The power transmission unit includes: a connecting rod, an inner bracket and a tension spring. One end of the connecting rod is connected to the slider, the other end of the connecting rod and the tension spring are connected to the upper end of the inner bracket through a pin, and the lower end of the inner bracket is connected to the execution unit.

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