CN111636792A - Door opening machine and automatic door - Google Patents

Abstract

The present disclosure relates to a door opening machine and an automatic door. The door opener is provided with a connecting structure, the connecting structure comprises a first connecting piece which is detachably connected with the door, so that the door opening machine has a first working mode and a second working mode which can be mutually switched, in the first operating mode, the first connecting piece is connected with the door, in the second operating mode, the first connecting piece is separated from the door, wherein the door opener is switchable from the first operating mode to the second operating mode when a touch force is applied to the door so that the door can be rotated relative to its own rotation axis by the touch force, thereby the door opening machine can not only actively open the door, but also separate from the door, the door can be conveniently and rapidly opened, and the condition that the door cannot be normally opened due to the failure of the door opener can be avoided, and the door opener is particularly suitable for the scenes of hospital wards or epidemic situation isolation areas and the like.

Description

Door opening machine and automatic door

Technical Field

The utility model relates to an automatic door spare part technical field specifically relates to a door operator and including this door operator's automatic door.

Background

In the medical industry, aiming at infectious disease isolation wards or epidemic situation isolation areas of hospitals, the demand of utilizing a delivery robot to realize goods delivery (medicine/meal/medical equipment) currently exists so as to reduce the contact probability of people and reduce the workload of medical staff. Therefore, there is a need for an active door opening for an unmanned delivery robot to enter a patient room.

Because the traditional common door does not support the remote control door switch, the scene that the unmanned distribution robot enters the ward and approaches the bed by itself cannot be supported. While the related art door openers have the following features: firstly, for the sake of safety, the door is opened at a low speed generally, and the opening speed is fixed; secondly, the fault rate of the door opener is high, if the door opener is stuck, the door cannot be opened due to the fixed connection of the door opener and the door, and the door is only collided by a strong force in an emergency, so that the door is damaged difficultly and easily. Because there are emergency events, such as rescue of patients, in hospital wards or isolation areas, the medical staff is forced to rush into the ward or isolation area quickly. Therefore, the problem that the door opening speed of the door opening machine is low and the door cannot be normally opened due to easy failure causes that the electric door of the related technology is not suitable for hospital wards or epidemic situation isolation areas.

Disclosure of Invention

The purpose of this disclosure is to provide a door operator and including this door operator's automatically-controlled door to the above-mentioned problem that the part solution prior art exists.

In order to achieve the above object, the present disclosure provides a door opening machine, the door opening machine has a connection structure, the connection structure includes a first connection piece, the first connection piece is separably connected to the door, so that the door opening machine has a first working mode and a second working mode that can be switched over to each other, the first working mode, the first connection piece with the door is connected, the second working mode, the first connection piece with the door breaks away from, wherein, when applying a touch force to the door, the door opening machine can be switched over from the first working mode to the second working mode, so that the door can rotate relative to its rotation axis under the effect of this touch force.

Optionally, connection structure still includes the second connecting piece, the second connecting piece be used for fixing on the door, first connecting piece can be under the effect of touching power with the second connecting piece breaks away from, so that door operator is in second mode, and can with the second connecting piece is connected once more, so that door operator is in first mode.

Optionally, one of the first connecting piece and the second connecting piece is a magnet, and the other is a ferromagnetic material piece.

Optionally, the first connecting piece has a first contact surface and the second connecting piece has a second contact surface for magnetic connection with the first contact surface.

Optionally, the magnet is an electromagnet, the door opening machine further includes a controller, a load cell, and a switch, the load cell is configured to be mounted on a door to detect a touch force applied to the door, the switch is configured to turn on or off power supply to the electromagnet, and the controller controls the switch to be turned on or off according to a detection result of the load cell.

Optionally, the door opener still includes drive arrangement and swing arm, the swing arm has relative first end and second end, first end with the drive arrangement transmission is connected so that the swing arm can wind first end with drive arrangement's tie point rotates, the second end with first connecting piece is articulated, can drive when the swing arm rotates first connecting piece is along the perpendicular to the direction of the pivot line of door is in move on the second connecting piece.

Optionally, the first connector comprises a cylindrical portion and a conical portion, a large end of the conical portion is connected to one end of the cylindrical portion, and an end face of the cylindrical portion, which is far away from the conical portion, is used for being detachably connected with the door.

Optionally, the second connector is configured as a bar structure extending in a direction perpendicular to the rotation axis of the door.

Optionally, one of the first connecting piece and the second connecting piece is provided with a plug, the other one of the first connecting piece and the second connecting piece is provided with a slot matched with the plug, and the plug and the slot are connected in a pluggable manner, so that the door opener can be switched between the first working mode and the second working mode.

Through above-mentioned technical scheme, because this door operator has a mode for door operator can normally open through first connecting piece drive door, and the door this moment has the function of automatically-controlled door, promptly, through the effect of door operator, the door can be opened voluntarily, thereby gets into ward and disease bedside for unmanned delivery robot and provides probably. Especially, when the door is actively opened during an epidemic situation and applied to an isolation ward, the unmanned distribution robot company can conveniently release services such as delivery, medicine delivery, meal delivery and the like in a hospital, and the door is favorable for reducing the contact probability of people and reducing the workload of medical staff.

And because the door opening machine can be switched from the first working mode to the second working mode under the action of touch force, the first connecting piece is separated from the door, so that the door is in a non-driving state and becomes a common unpowered door. At the moment, when the door is impacted by external force (for example, a person pushes the door strongly), the door can be opened rapidly, so that medical personnel can enter a ward of a patient in time to rescue the patient.

Moreover, because the first connecting piece can be separated from the door, if the door opening machine breaks down, the door can still be normally opened, and the medical staff or the delivery robot cannot be influenced to enter the room. Therefore, the situation that the door cannot be normally opened due to the failure of the door opener can be avoided, and the damage of the door due to the collision of the door is avoided.

In addition, the door opener support provided by the disclosure is improved on the existing door, the dual-mode work of the door opener can be realized without structural improvement on the existing door, and the structure is simplified while the cost is saved.

In summary, the door opener disclosed by the invention gives consideration to active/passive door opening requirements, realizes active/passive control of door opening and closing control, can support active door opening action triggered by electric control/automation/remote control, also supports scenes in which people need to be allowed to rush in without obstacles, is particularly suitable for special scenes such as hospital wards or epidemic situation isolation areas, and provides a foundation for future man-machine mixed unmanned distribution scenes.

According to another aspect of the present disclosure, there is provided an automatic door including a door and the door opening machine described above.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

FIG. 1 is a schematic top view of an automatic door of one embodiment of the present disclosure showing a door opening machine;

fig. 2 and 3 are schematic views illustrating a door opening process of a door opening machine according to an embodiment of the present disclosure in a first operation mode;

fig. 4 and 5 are schematic views illustrating a door opening process of the door opening machine in the second operation mode according to an embodiment of the present disclosure.

Description of the reference numerals

100-door opening machine; 10-a connecting structure; 11-a first connection member; 111-a cylindrical portion; 112-a frustum portion; 113-a first contact surface; 12-a second connector; 121-a second contact surface; 20-a hinge; 30-a drive device; 40-swing arm; 200-a door; 210-a hinge; a-the axis of rotation of the door.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, unless otherwise stated, the terms of orientation such as "up" and "down" are generally used to refer to the up and down of the door when the door is in the installed state, and may refer to the end of the door close to the ground as the lower end and the end far from the ground as the upper end, and "inside" and "outside" refer to the inside and outside of the relevant components. In addition, the terms "first", "second", and the like used in the embodiments of the present disclosure are for distinguishing one element from another, and have no order or importance.

As shown in fig. 1 to 5, the present disclosure provides a door opening machine 100 and an automatic door including the door opening machine 100, the door opening machine 100 being used to open or close a door 200. The door operator 100 has a connecting structure 10, and the connecting structure 10 includes a first link 11, and the first link 11 is separably connected to the door 200 so that the door operator 100 has a first operating mode and a second operating mode that can be switched with each other, in the first operating mode, the first link 11 is connected to the door 200, and in the second operating mode, the first link 11 is separated from the door 200. In which the door operator 100 can be switched from the first operation mode to the second operation mode when a touch force (e.g., a pushing force) is applied to the door 200, so that the door 200 can be rotated with respect to its rotation axis by the touch force. In other words, when a touch force is applied to the door 200, the first link 11 can be separated from the door 200 by the touch force, so that the door 200 can be rotated to be opened by the touch force. That is, the door opening machine 100 is applied to a side hung door. In the present disclosure, since the door operator can switch between the first operation mode and the second operation mode, the first link 11 can be reconnected with the door 200.

Through the technical scheme, when the door operator 100 provided by the disclosure is applied to the opening and closing of the door 200, the door operator 100 has the first working mode, so that the door operator 100 can normally open the door 200 through the first connecting piece 11, the door 200 at the moment has the function of the automatic door 200, namely, the door 200 can be actively opened through the action of the door operator 100, and the possibility that an unmanned distribution robot enters a ward and a patient bed is provided. Especially, when the door 200 is actively opened in an epidemic situation and applied to an isolation ward, the unmanned distribution robot company can conveniently release services such as delivery, medicine delivery, meal delivery and the like in a hospital, and the door is favorable for reducing the contact probability of people and reducing the workload of medical staff.

Further, since the door operator 100 can be switched from the first operation mode to the second operation mode by the touch force, the first link 11 is separated from the door 200, so that the door 200 is in a non-driving state, and becomes a general non-powered door. At this time, when the door 200 is impacted by an external force (e.g., a person pushes the door 200 strongly to apply a touch force to the door 200), the door 200 can be opened rapidly, so that a medical worker can enter a patient room in time to rescue the patient. After the medical staff passes through, the door 200 can be operated manually by the door operator 100 or manually, so that the first connecting piece 11 is close to the door 200 and is connected again, and the door operator 100 returns to the second working mode.

Moreover, since the first connecting member 11 can be separated from the door 200, if the door opener fails, for example, if the power member (such as a motor) or the transmission assembly (reducer) of the door opener fails, the door 200 can still be opened normally, and the medical staff or the delivery robot is not influenced to enter the room. Therefore, the situation that the door 200 cannot be normally opened due to the failure of the door operator 100 can be avoided, and the damage of the door 200 due to the collision against the door 200 can be avoided.

In addition, the door operator 100 provided by the present disclosure supports the modification of the existing door, allows the dual mode operation of the door operator 100 to be realized without the structural improvement of the existing door, and is advantageous for saving the cost while simplifying the structure.

In summary, the door opener 100 disclosed herein considers the active/passive door opening appeal, realizes active/passive control of the opening and closing control of the door 200, can support both active door opening actions triggered by electric control/automation/remote control and scenes requiring barrier-free permission of people to rush in, is particularly suitable for special scenes such as hospital wards or epidemic situation isolation areas, and provides a foundation for future man-machine hybrid unmanned distribution scenes.

It should be noted that the control of the door opener 100 may be controlled by a wall switch or a remote control system. If the unmanned distribution robot has a command transmitting end, the opening and closing of the door 200 may be controlled by the unmanned distribution robot.

In addition, in the present disclosure, other embodiments may be employed besides the first link 11 and the door 200 may be disengaged by the touch force. For example, the first connecting member 11 may be configured as an electromagnet, and the controller may be used to control the energization and de-energization of the first connecting member 11, thereby controlling the disconnection of the magnetic connection of the first connecting member 11 with the door 200. Thus, when the medical staff needs to open the door 200 quickly, the controller can be used to de-energize the first connector 11 and lose the magnetic force to disconnect the door 200 from the door opener 100.

In the present disclosure, the first connecting member 11 may be directly connected to the door 200, or may be connected to the door 200 by using an intermediate connecting member, which is not limited in the present disclosure. Optionally, as shown in fig. 1, in an embodiment of the present disclosure, the connecting structure 10 further includes a second connecting member 12, the second connecting member 12 is used for being fixed to the door 200, the first connecting member 11 can be separated from the second connecting member 12 under the action of a touch force, so as to enable the door opening machine 100 to be in the second working mode, and can be connected with the second connecting member 12 again, so as to enable the door opening machine 100 to be in the first working mode, thereby enabling the door opening machine 100 to be separated from and connected with the door 200 again, so that the door opening machine 100 can be switched between the first working mode and the second working mode. Through setting up second connecting piece 12, can do the modification that corresponds according to the structure of first connecting piece 11, remove the redesign to door 200 from for the door operator 100 that this disclosure provided can be applied to different doors 200, have increase door operator 100 the commonality, avoid causing destruction, reduce advantages such as processing cost to door 200.

In the present disclosure, the second connecting member 12 may be mounted on the door 200 in any suitable manner, and optionally, the second connecting member 12 may be mounted on the door 200 in a manner such as adhesion (e.g., super glue), screwing, clipping, or riveting, so as to ensure that the second connecting member 12 is reliably connected with the door 200. In addition, the present disclosure does not limit the installation position of the second connector 12 on the door 200, and alternatively, the second connector may be installed on the upper end surface of the door 200 where the door 200 is installed.

It will be appreciated that when the first coupling member 11 is used to directly couple the door 200, the versatility of the door operator 100 can be increased by the design of the first coupling member 11, for example, since the door 200 is mostly a metal door 200 now, a magnetic coupling portion or an adhesive layer may be provided on the first coupling member 11 for coupling with the door 200. In this way, the first connecting piece 11 can be disconnected from and reconnected to the door 200 under the touch force, and the door operator 100 can be switched between the first operating mode and the second operating mode.

In the present disclosure, there are various ways to achieve the first connecting member 11 and the second connecting member 12 to be detachable and re-connectable.

Alternatively, in one embodiment of the present disclosure, one of the first connecting member 11 and the second connecting member 12 may be a magnet, and the other one may be a ferromagnetic material (made of iron, steel, nickel, cobalt, etc.). Thus, as shown in fig. 4 and 5, when the door 200 is impacted by a force F (i.e., a touch force), and the touch force overcomes the magnetic force between the first connecting member 11 and the second connecting member 12, the magnet and the ferromagnetic material may not sufficiently pull the door 200, so that the first connecting member 11 is disconnected from the second connecting member 12 (or the door 200), and the door 200 is separated from the door operator 100, thereby opening the door 200 under the touch force. Thereafter, the door opening machine 100 or the door 200 may be operated such that the first link 11 is moved relative to the door 200 to be close to the other, thereby re-connecting the first link 11 with the second link 12.

Alternatively, as shown in fig. 5, the first connecting member 11 has a first contact surface 113, and the second connecting member 12 has a second contact surface 121 for magnetically connecting with the first contact surface 113, i.e., the first connecting member 11 and the second connecting member 12 form a surface-to-surface contact. The surface-to-surface contact is beneficial to increase the contact area between the first connecting piece 11 and the second connecting piece 12 or the door 200, so as to be beneficial to ensuring the connection reliability between the first connecting piece 11 and the second connecting piece 12 or the door 200, and as shown in fig. 2 and 3, the surface-to-surface contact between the first connecting piece 11 and the second connecting piece 12 is convenient for the first connecting piece 11 to slide on the second connecting piece 12.

Further, in one embodiment of the present disclosure, the magnet may be an electromagnet, i.e., the magnet has magnetism when energized and loses magnetism when de-energized. In this embodiment, the door opening machine 100 may further include a controller for turning off or on the power supply of the electromagnet, a load cell for being mounted to the door 200 to detect a touch force applied to the door 200, and a switch for controlling the turning on and off of the switch according to the detection result of the load cell to turn on or off the electromagnet. For example, when the touch force is not greater than the preset value, the controller controls the switch to be in a closed state, so that the first connecting piece 11 and the second connecting piece 12 are kept in magnetic connection. When the touch force is greater than the preset value, the controller controls the switch to the off state, so that the first connecting piece 11 is disconnected from the second connecting piece 12.

Like this, when the doctor need get into indoor rescue fast, detect the thrust that comes the people to apply on door 200 through the load cell, controller control switch disconnection is to the power supply of electro-magnet for the electro-magnet loses magnetism, thereby breaks off the magnetic force of first connecting piece 11 and second connecting piece 12 and is connected, makes door 200 can be opened fast. The arrangement of the controller, the load cell and the switch is beneficial to the automation degree of the lifting door 200 when the lifting door needs to be opened quickly, and the magnetic connection and disconnection mode of the first connecting piece 11 and the second connecting piece 12 is increased. On the other hand, because the magnetic force of electro-magnet can disappear after the outage, when the electro-magnet outage, need not to use great thrust to overcome magnetic force and can open door 200 fast. On the basis, the magnetic force when the electromagnet is electrified is allowed to be properly increased so as to ensure the reliability of the connection between the first connecting piece 11 and the second connecting piece 12 (the door 200) in the first working mode.

It is understood that in other embodiments of the present disclosure, whether the medical staff needs to enter the room may be determined by the image collector or the temperature sensor, and the detected result is transmitted to the controller, so that the controller controls the power on and power off of the electromagnet to enter and break the magnetic connection between the first connecting member 11 and the door 200.

In addition, in other embodiments of the present disclosure, a plug may be provided in one of the first connector 11 and the second connector 12, and a slot for mating with the plug may be provided in the other, so that the door operator 100 can switch between the first operation mode and the second operation mode through the pluggable connection of the plug and the slot. Optionally, the first connecting member 11 is provided with a plug, the second connecting member 12 is provided with a slot, and in the first working mode, the plug is inserted into the slot, and the door opener 100 drives the first connecting member 11 to move, so as to open or close the door 200. When medical staff strongly pushes the door 200 due to the need of entering a room quickly, the plug is withdrawn from the slot due to the instant impact force applied to the door 200, so that the first connector 11 and the second connector 12 (the door 200) are separated, and the door 200 can be opened quickly under the action of the pushing force. Thereafter, the plug of the first connector 11 and the socket of the second connector 12 can be reconnected by driving the first connector 11 and the door 200 to move relatively.

Alternatively, in one embodiment of the present disclosure, referring to fig. 1, the door 200 is a side hung door, that is, the door 200 is hinged to one side of a door frame (not shown) by a hinge 210, and the door 200 is rotatably connected to the door frame. In this embodiment, in order to facilitate the door opening machine 100 to drive the door 200 to rotate around its own rotation line, as shown in fig. 1, the door opening machine 100 further includes a driving device 30 and a swing arm 40, the swing arm 40 has a first end and a second end opposite to each other and can rotate around a connection point of the first end and the driving device 30, and the second end is hinged to the first connecting member 11 (as shown in fig. 1, the swing arm 40 and the first connecting member 11 can be hinged by a hinge 20). Alternatively, the swing axis of the swing arm 40 is parallel to the rotation axis of the door 200, and the swing arm 40 can drive the first connecting member 11 to move on the second connecting member 12 along the direction perpendicular to the rotation axis of the door 200 when rotating.

Thus, as shown in fig. 2, in the first operation mode, the swing arm 40 is driven by the driving device 30 to rotate counterclockwise, so as to drive the door 200 to rotate counterclockwise, and at the same time, the first connecting member 11 slides on the door 200 in a direction close to the rotation axis of the door 200 on the second connecting member 12, and finally, the door 200 is driven to open to the position shown in fig. 3. When the door 200 needs to be closed, the swing arm 40 can be driven by the driving device 30 to rotate in the clockwise direction, so as to drive the door 200 to rotate in the clockwise direction, and meanwhile, the first connecting piece 11 slides on the door 200 in the direction away from the rotating axis of the door 200 on the second connecting piece 12, so that the door 200 can be finally driven to be closed to the position shown in fig. 1.

When the door 200 is disconnected from the first connecting member 11 by an external force and the medical staff passes through the door, the swing arm 40 is rotated counterclockwise as shown in fig. 5, so that the first connecting member 11 is connected to the second connecting member 12 again.

The drive device 30 may have any suitable structural configuration. In one embodiment, the driving device 30 may optionally include a driver composed of a motor, a speed-changing mechanism and a clutch device, and the output rotating shaft 31 of the driver is connected to the first end of the swing arm 40 to rotate the swing arm 40.

It is understood that in other embodiments of the present disclosure, the second link 12 may be hinged to the door 200 and the first link 11 may be hinged to the swing arm 40. In this way, the connecting structure 10 (the first connecting member 11 and the second connecting member 12) and the swing arm 40 are constructed in a crank link structure by properly designing the lengths of the first connecting member 11, the second connecting member 12 and the swing arm 40. When the swing arm 40 rotates, even if the second link 12 does not move on the door 200, the opening and closing of the door 200 can be also achieved.

In addition, in other embodiments of the present disclosure, the swing arm 40 may not be provided, and the driving device 30 may be a telescopic cylinder structure, a cylinder body of the telescopic cylinder structure is fixed on a door frame or a wall body, and one end of a piston rod of the telescopic cylinder structure is hinged to the door 200. In this way, the door 200 can be opened and closed by the telescopic movement of the piston rod.

The present disclosure does not limit the specific shapes of the first connecting member 11 and the second connecting member 12. Alternatively, as shown in fig. 1, in an embodiment of the present disclosure, the first connector 11 is a magnet, is configured as a magnetic attraction head structure, and may include a cylindrical portion 111 and a frustum portion 112, a large end of the frustum portion 112 is connected to one end of the cylindrical portion 111, and an end surface of the cylindrical portion 111 remote from the frustum portion 112 is detachably connected to the door 200 or the second connector 12. Here, the end surface is the first contact surface 113, and as can be seen from the above discussion, the first contact surface 113 is in surface-to-surface contact with the second contact surface 121, which is beneficial to ensure the connection reliability of the first connector 11 and the second connector 12 or the door 200, and the surface-to-surface contact is beneficial to facilitate the sliding of the first connector 11 on the second connector 12 or the door 200.

As shown in fig. 1 to 5, the small end of the frustum portion 112 is hinged to the driving device 30, i.e., to the second end of the swing arm 40, and since the small end of the frustum portion 112 is small in size, it is not easy to interfere with the rotation of the swing arm 40 and the first connecting member 11.

Alternatively, as shown in fig. 1, in one embodiment of the present disclosure, the second connection member 12 is a bar-shaped structure extending in a direction perpendicular to the rotation axis of the door 200, equivalent to forming a slide, and the second contact surface 121 is configured as an elongated surface. The structure is designed such that in the first operation mode, the second connecting member 12 can still be magnetically connected with the first connecting member 11 during the movement of the first connecting member 11 in the direction perpendicular to the rotation axis of the door 200. On this basis, the strip structure is favorable for saving materials and occupying a smaller area of the door 200, so that the beauty of the door 200 is not affected.

According to another aspect of the present disclosure, there is provided an automatic door including the door 200 and the door opening machine 100 described above. Wherein, optionally, in an embodiment of the present disclosure, as shown in fig. 1, the door 200 may be a side hung door, and one side of the door 200 may be rotatably installed at one side of the door frame by a hinge 210.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner to avoid unnecessary repetition, and the disclosure does not separately describe various possible combinations.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims (10)

1. The door opening machine is characterized in that the door opening machine (100) is provided with a connecting structure (10), the connecting structure (10) comprises a first connecting piece (11), the first connecting piece (11) is detachably connected to a door (200) so that the door opening machine (100) has a first working mode and a second working mode which can be mutually switched, the first connecting piece (11) is connected with the door (200) in the first working mode, and the first connecting piece (11) is separated from the door (200) in the second working mode, wherein when the door (200) is subjected to touch force, the door opening machine (100) can be switched from the first working mode to the second working mode so that the door (200) can rotate relative to the rotation axis of the door (200) under the action of the touch force.

2. The door opener according to claim 1, wherein the connecting structure (10) further comprises a second connecting piece (12), the second connecting piece (12) is used for being bonded, screwed or clamped on the door (200), the first connecting piece (11) can be separated from the second connecting piece (12) under the action of touch force, so that the door opener (100) is in the second working mode, and can be connected with the second connecting piece (12) again, so that the door opener (100) is in the first working mode.

3. Door opener according to claim 2, characterized in that one of the first and second connecting pieces (11, 12) is a magnet and the other is a piece of ferromagnetic material.

4. Door opener according to claim 3, characterized in that the first connecting piece (11) has a first contact surface (113) and the second connecting piece (12) has a second contact surface (121) for magnetic connection with the first contact surface (113).

5. The door opening machine according to claim 3, wherein the magnet is an electromagnet, the door opening machine (100) further comprises a controller, a load cell for being mounted to the door (200) to detect a touch force applied to the door (200), and a switch for turning on or off the power supply to the electromagnet, the controller controlling the turning on and off of the switch according to the detection result of the load cell.

6. The door opener according to claim 2, characterized in that the door opener (100) further comprises a driving device (30) and a swing arm (40), the swing arm (40) has a first end and a second end which are opposite, the first end is in transmission connection with the driving device (30) so that the swing arm (40) can rotate around a connection point of the first end and the driving device (30), the second end is hinged with the first connecting piece (11), and the swing arm (40) can drive the first connecting piece (11) to move on the second connecting piece (12) along a direction perpendicular to a rotating shaft moving line (a) of the door (200) when rotating.

7. Door opening machine according to any one of claims 1-6, characterized in that the first connecting piece (11) comprises a cylindrical part (111) and a frustum part (112), the large end of the frustum part (112) being connected to one end of the cylindrical part (111), the end surface of the cylindrical part (111) remote from the frustum part (112) being intended for detachable connection with the door (200).

8. Door opening machine according to any of the claims 2-6, characterized in that the second connection (12) is configured as a bar-shaped structure extending in a direction perpendicular to the rotation axis (a) of the door (200).

9. Door opener according to claim 2, characterized in that one of the first and second connecting pieces (11, 12) is provided with a plug and the other is provided with a socket for mating with the plug, the plug and socket being detachably connected to enable the door opener (100) to be switched between the first and second operating modes.

10. An automatic door, characterized by comprising a door (200) and a door opening machine (100) according to any one of claims 1-9.

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