Electric hinge

Abstract

The utility model discloses an electric hinge which comprises a shell, a power unit, an operation form switching unit, an output unit, a power transmission unit and an execution unit, the power unit, the operation form switching unit, the output unit, the power transmission unit and the execution unit are installed on the shell, and the operation form switching unit, the output unit, the power transmission unit and the execution unit are in linkage. The power unit and the operation form switching unit have a first state and a second state, in the first state, the power unit and the operation form switching unit are connected, the power unit provides power to drive the operation form switching unit and the output unit to operate, then the power transmission unit and the execution unit are driven, and the execution unit is made to electrically operate; in the second state, the power unit and the operation form switching unit are disconnected, and the execution unit operates under external force and reversely drives the power transmission unit, the output unit and the operation form switching unit to operate; the electric hinge can be electrically controlled and manually controlled, the manual and automatic integrated function is achieved, the electric hinge can be switched to the manual control when power is cut off in any state, electric and manual switching can be achieved in any state, resetting is not needed, function switching is flexible, and use is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of hinges, and more specifically to an electric hinge. Background Art

[0002] There are many types of hinges. The specific structure and type of hinges are different according to the type of objects. At present, there are hinges used in small household appliances on the market, mainly used in household appliances such as microwave ovens and ovens, which flexibly connect the body and the door and can be rotated to open and close. Traditional hinges are generally opened manually, and as home appliances and kitchen equipment continue to develop towards intelligence, electric opening and closing hinges suitable for small household appliances have begun to appear.

[0003] The electric hinges in the prior art are all opened and closed electrically. 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-on. In addition, the traditional electric hinge needs to calculate the stroke. For example, if it is driven by a screw rod, it is necessary to calculate the stroke of the screw rod and judge the distance of the swing head before it 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 travel process. That is, when the swing head of the hinge is switching from the closed state to the expanded state, if it is opened electrically, it cannot be switched to manual opening when it is opened to the half state, and 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. Utility Model Content

[0005] In view of this, the utility model provides an electric hinge.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solution: the electric hinge comprises: a housing, a power unit installed on the housing, an operation mode switching unit, an output unit, a power transmission unit and an execution unit, and 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 operates electrically;

[0009] In the second state, the power unit and the operation mode switching unit are disconnected, the execution unit operates under the 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 utility model, 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 the moving iron core 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 is connected 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 reset spring and is disconnected from the power unit. The utility model controls the connection between the operating mode switching unit and the power unit by generating a magnetic field through the energized coil, and the control method is simple and the connection is stable.

[0015] As a preferred solution of the utility model, 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 utility model 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.

[0016] As a preferred solution of the utility model, the first end of the moving iron core is set to a non-cylindrical shape, 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

[0017] 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 be non-cylindrical with matching 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.

[0018] As a preferred solution of the utility model, 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, 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.

[0019] As a preferred solution of the utility model, the output unit is a screw rod rotation module, comprising: an output frame, a screw rod rotatably mounted on the output frame, and a slider mounted on the screw rod;

[0020] The movable iron core is connected to the lead screw when in the first position and the second position, and the movable iron core and the lead screw rotate synchronously;

[0021] The slider is installed on the screw and limited by the output frame, and the curved motion of the screw is converted into the linear motion of the slider;

[0022] 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 lead screw.

[0023] As a preferred solution of the utility model, between the moving iron core and the lead screw, one of them is provided with a non-circular plug hole, and the other is provided with a non-circular insertion portion, so that the two can be rotatably connected;

[0024] The depth of the insertion hole is greater than the travel distance of the moving iron core switching between the first position and the second position.

[0025] As a preferred solution of the utility model, ball bearings are provided at both ends of the screw rod, and the output frame is correspondingly provided with a fixing flange.

[0026] As a preferred solution of the utility model, the output shaft, the moving iron core and the lead screw of the motor are coaxially arranged.

[0027] As a preferred solution of the utility model, 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.

[0028] It can be seen from the above technical scheme that compared with the prior art, the utility model has the following beneficial technical effects: in the utility model, 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; the hinge of the utility model can realize switching between manual and electric 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 electrically, which 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

[0029] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0030] Figure 1 It is a schematic diagram of the electric hinge of the utility model in a closed state;

[0031] Figure 2 It is a schematic diagram of the electric hinge of the utility model in a semi-open (closed) state;

[0032] Figure 3 It is a schematic diagram of the electric hinge of the utility model in the unfolded state;

[0033] Figure 4 This is an exploded view of the electric hinge of the utility model;

[0034] Figure 5 It is a schematic diagram of the structure of the power unit, the operation mode switching unit and the output unit in the electric hinge of the utility model;

[0035] Figure 6 It is an exploded diagram of the power unit, the operation mode switching unit and the output unit in the electric hinge of the utility model;

[0036] Figure 7 It is a schematic diagram of the electric hinge of the utility model in the closed state in the electric mode;

[0037] Figure 8 It is a schematic diagram of the electric hinge of the utility model in the unfolded state in the electric mode;

[0038] Fig. 9 It is a schematic diagram of the electric hinge of the utility model in the closed state in the manual mode;

[0039] Fig.10 It is a schematic diagram of the electric hinge of the utility model in the unfolded state in the manual mode.

[0040] Description of reference numerals:

[0041] Shell 00 Rack 01 Power Unit 100 Motor 110 Output shaft 111 Operation mode switching unit 210 Bracket 211 Coil assembly 212 Return spring 213 Moving iron core 214 Output unit 220 Output rack 221 Linear slot 2211 Screw 222 Slider 223 Ball bearing 224 Fixed flange 225 Power transmission unit 300 Connecting rod 310 Internal support 320 Extension spring 330 Execution unit 400 DETAILED DESCRIPTION

[0042] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0043] Electric hinges, see Figure 1-10 As shown, it includes: a housing 00, a power unit 100 installed on the housing 00, an operation mode switching unit 210, an output unit 220, a power transmission unit 300 and an execution unit 400, and the operation mode switching unit 210, the output unit 220, the power transmission unit 300 and the execution unit 400 are linked;

[0044] The power unit 100 and the operation mode switching unit 210 have a first state and a second state:

[0045] 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;

[0046] In the second state, the power unit 100 and the operation mode switching unit 210 are disconnected, the execution unit 400 operates under the external force, and drives the power transmission unit 300, the output unit 220 and the operation mode switching unit 210 to operate in reverse.

[0047] Specifically, the housing 00 can be designed as any structure, mainly serving as a carrier, and 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; Figure 4As shown, the housing 00 is a semi-enclosed long strip, and can be made of a high-hardness metal material; 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, and can realize forward rotation and reverse rotation;

[0048] like Figure 5 and Figure 6 As shown, the operation mode switching unit 210 is a magnetic driving module;

[0049] The operation mode switching unit 210 includes: a bracket 211, a coil assembly 212, a return spring 213 and a moving iron core 214;

[0050] The moving iron core 214 is movably installed in the bracket 211. The moving iron core 214 can move to a first position and a second position. When the coil group 212 is energized to generate a magnetic field, the moving iron core 214 moves to the first position under the action of the magnetic force and is connected to the power unit 100.

[0051] After the coil assembly 212 is powered off, the moving iron core 214 moves to the second position under the force of the return spring 213 and is disconnected from the power unit 100;

[0052] 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, according to 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, and can also be located inside the shell 00 at the same time;

[0053] The coil group 212 is not energized, and the coil group 212 does not generate a magnetic field. The moving iron core 214 moves in a direction away from the output shaft 111 and 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 not connected. The user can manually apply force to push the execution unit 400 to operate, and then the power transmission unit 300 and the operation mode switching unit 210 operate, and the operation mode switching unit 210 drives the output unit 220 to operate.

[0054] After the coil group 212 is energized, the coil group 212 generates a magnetic field, and the moving iron core 214 overcomes the elastic force of the return spring 213 under the action of the magnetic force and moves toward the output shaft 111, and is plugged into the output shaft 111. After the plugging, when the motor 110 is running, the moving iron core 214 is driven to rotate through the output shaft 111, and then the operation of the power transmission unit 300 and the execution unit 400 is controlled.

[0055] 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.

[0056] Furthermore, the movable iron core is plugged into the output shaft of the motor when in the first position, which may be in the following form: the first end of the movable iron core 214 is set to be non-cylindrical, 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

[0057] 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.

[0058] The above-mentioned moving iron core 214 and the output shaft 111 are directly plugged in; of course, an indirect connection method can also be adopted, such as providing upper and lower connecting heads with teeth between the first end of the moving iron core 214 and the output shaft 111 for connection; or providing gears between the first end of the moving iron core 214 and the output shaft 111 for connection through gears, etc.; however, the direct plug-in method is the simplest, reduces assembly steps, and is low in cost.

[0059] 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 limited to the outer bottom surface of the bracket 211, and the other end is limited to the second end of the moving iron core 214.

[0060] like Figure 7 As shown, 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 upwardly separating from the bracket 211. The bracket 211 also defines a channel for assembling the moving iron core 214. The coil group 212 is wound around the outer side of the moving iron core 214. Figure 7 The black shadow block portion simply shows that the moving iron core 214 can move up and down due to the magnetic force and the force of the return spring 313.

[0061] In one embodiment, if Figure 4 As shown, the output unit 220 is a screw rod rotation module, including: an output frame 221, a screw rod 222 rotatably mounted on the output frame 221, and a slider 223 assembled on the screw rod 222;

[0062] The movable iron core 214 is connected to the screw rod 222 when in the first position and the second position, and the movable iron core 214 and the screw rod 222 rotate synchronously;

[0063] The slider 223 is mounted on the screw rod 222 and limited by the output frame 221, and the curved motion of the screw rod 222 is converted into the linear motion of the slider 223;

[0064] See also Figure 5-6 As shown, the output frame 221 is fixedly installed inside the housing 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 only move along the linear groove 2211, but not to rotate.

[0065] Furthermore, between the moving iron core 214 and the lead screw 222, one of them is provided with a non-circular plug hole, and the other is provided with a non-circular insertion portion, so that the two can be rotatably connected;

[0066] The depth of the insertion hole is greater than the travel distance of the moving iron core switching between the first position and the second position.

[0067] like Figure 7 As shown, Figure 7 In manual mode, 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 unfold. 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.

[0068] like Fig. 9 As shown, Fig. 9 In the electric mode, 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, and 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 unfold.

[0069] In one embodiment, ball bearings 224 are disposed at both ends of the screw rod 222 , and a fixing flange 225 is correspondingly disposed 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 .

[0070] Furthermore, the output shaft 111 of the motor 110 , the moving iron core 214 and the lead screw 222 are coaxially arranged.

[0071] 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.

[0072] Specifically, Figure 1-3 As shown, the execution unit 400 is pressed into a sheet shape by a metal material, and has the characteristics of high hardness and high strength. The execution unit 400 is in the form of a thin sheet, and the shape is not limited;

[0073] One end of the actuator 400 is rotatably connected to the housing 00. The actuator 400 is provided with an arc groove 410. The lower end of the inner bracket 320 is connected to the arc groove 410 of the actuator 400 through a pin. The middle of the inner bracket 320 is connected to the strip groove provided in the housing 00 through 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.

[0074] The use of the utility model is further described below:

[0075] The utility model electric hinge has manual mode and electric mode:

[0076] In manual mode:

[0077] like Figure 7 As shown, 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 insertion hole at the lower end of the moving iron core 214. Manual force is applied to push the execution unit 400 to rotate clockwise and unfold. The execution unit 400 drives the inner bracket 320 to move downward, and then pulls the connecting rod 310 to move downward. The slider 223 moves downward along the screw rod 222, and the screw rod 222 rotates clockwise. After the execution unit 400 is unfolded, Figure 8 As shown;

[0078] like Figure 8 As shown, manual force is applied to push 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; after the execution unit 400 is closed, Figure 7 As shown;

[0079] In electric mode:

[0080] like Fig. 9As shown, 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 jack at the lower end of the moving iron core 214. The motor 210 starts and rotates forward, and the output shaft 111 drives the moving iron core 214 to rotate, and then the transmission screw rod 222 rotates forward, and the slider 223 moves down along the screw rod 222, pushing the connecting rod 310 and the inner bracket 320 to move down, and then the execution unit 400 rotates and unfolds along the pointer. After the execution unit 400 is unfolded, Fig.10 As shown;

[0081] like Fig.10 As shown, 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 up along the screw 222, pushing the connecting rod 310 and the inner bracket 320 to move up, and then the execution unit 400 rotates counterclockwise to close. After the execution unit 400 is closed, Fig. 9 As shown;

[0082] The utility model electric hinge can realize the switching between manual mode and electric mode in any travel, such as Figure 2 As shown, at this time, the execution unit 400 is approximately in a half-open state. If it is in manual mode at this time, the coil group 212 is energized to generate a magnetic field, so that the moving iron core 214 moves up and connects to the output shaft 111, and the motor 110 runs, thereby converting the execution unit 400 to the electric mode and continuing to run; if Figure 2 In the electric mode, when the power is off, the electromagnetic field of the coil group 212 disappears, so that the moving iron core 214 moves downward and separates from the output shaft 111 under the force of the reset spring 213, and the user can continue to manually push the execution unit 400 to run.

[0083] Furthermore, the motor 110 of the utility model is provided with a stall current threshold. When the load of the execution unit 400 is so large 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 the 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 the 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 the manual mode, thereby 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.

[0084] In electric mode, when the oven door is opened to the maximum angle, the execution unit 400 cannot continue to rotate to open, then 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 off, and the opening is completed; when the oven door is closed, the execution unit 400 cannot continue to rotate to close, then 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 off, and the closing is completed.

[0085] The electric hinge of the utility model can be electrically controlled and manually controlled to realize the manual-automatic integrated function to meet the needs of users. 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 the use is more convenient.

[0086] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those 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 will not be limited to the embodiments shown herein, but will 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 installed 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 operates electrically; In the second state, the power unit and the operation mode switching unit are disconnected, the execution unit operates under the external force, and drives the power transmission unit, the output unit and the operation mode switching unit to operate in the reverse direction.

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 the moving iron core 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 is connected to the power unit; After the coil assembly 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 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.

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, the output shaft of the motor is configured to have 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 arranged to be non-cylindrical in shape to match 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 limited to the outer bottom surface of the bracket, and the other end is limited 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 rod rotation module, comprising: an output frame, a screw rod rotatably mounted on the output frame, and a slider mounted on the screw rod; The movable iron core is connected to the lead screw when in the first position and the second position, and the movable iron core and the lead screw rotate synchronously; The slider is installed on the lead screw and limited by the output frame, and the curved motion of the lead screw is converted into the 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 of them is provided with a non-circular plug hole, and the other is provided with a non-circular insertion portion, so that the two can be rotatably connected; The depth of the insertion hole 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 arranged at both ends of the screw rod, and a fixing flange is arranged correspondingly on the output frame.

9. The electric hinge according to claim 3, 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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