Non-contact inductive switch transmission mechanism and door

Abstract

The utility model relates to a non-contact inductive switch transmission mechanism and a non-contact inductive switch door, which comprise an in-out obstacle for opening and closing a hatch of an accommodating space; the at least one electric actuator is used for driving the access barrier to at least move to a first position for opening the hatch and a second position for closing the hatch; the at least three induction electrodes are arranged on the surface of an access barrier and / or the periphery of a hatch, every two induction electrodes form electrode pairs of mutual capacitance, the first group of electrode pairs and the second group of electrode pairs are oppositely distributed, and the distance between geometric centers of electrode shapes between the first group of electrode pairs and the second group of electrode pairs is 0.2-100 cm; the capacitance digital conversion circuit is respectively coupled with each induction electrode; and the processing module is coupled with the capacitance digital conversion circuit and the electric actuator.

Description

Technical Field

[0001] The utility model relates to the field of electric doors, in particular to a non-contact induction switch transmission mechanism and a door. Background Art

[0002] Doors are used in various types of occasions as barriers to entry into container hatches, one of the typical applications being the lid of a trash can. Trash cans in public places have a huge flow of people, and the traditional way of manually opening the lid to throw away trash has become increasingly sensitive as people's awareness of hygiene has increased. Contactless opening and closing of trash cans has become increasingly important in public environments.

[0003] Capacitive technology has strong advantages in the application of non-contact sensing, and is favored by the market due to its easy arrangement, structure, and cost of electrodes. Existing mature capacitance-to-digital conversion circuits (CDC), such as DAI7142 and ADI7147, use a Δ-∑ modulation method to directly convert the measured capacitance value into a digital value by repeatedly charging and discharging the measured capacitance and comparing it with the reference capacitance (see: US Patent Number: 5,134,401). This can increase the measurement sensitivity of the capacitance to 1ff level, and easily meet the measurement system's requirements for capacitance measurement sensitivity. It also has the characteristic of being immune to stray capacitance. In particular, the design of these chips has multiple channels, making the circuit design simple and convenient.

[0004] There are two types of non-contact induction opening of barrel lids using capacitive technology on the market:

[0005] CN 208882604 U An all-round inductive trash can, wherein electrodes are distributed at different positions on the trash can head, forming an inductive area in the surrounding space, covering 360 degrees around the trash can, adopting self-capacitance to cooperate with multiple electrodes to form gesture instructions; Hall sensing is adopted for closing in place.

[0006] CN 208868720 U Capacitive induction trash can, the electrodes also adopt self-capacitance to form two self-capacitance induction switches for gesture recognition.

[0007] The above two solutions do not handle false touches. The door can be triggered to open when a person passes by, metal is waved through the air, or a large area of a person approaches. This is especially true in public environments with frequent traffic and for side-opening trash cans. It is easy to be triggered by mistake when a person walks by or stands in front. Utility Model Content

[0008] The utility model aims to provide a hardware structure of a non-contact inductive switch transmission mechanism, which is used to realize the non-contact opening and closing of the capacitive switch and prevent accidental touch at the same time.

[0009] For this purpose, a non-contact inductive switch drive mechanism is provided, including: an access barrier for opening and closing the hatch of the accommodation space; at least one electric actuator for driving the access barrier to move at least to a first position for opening the hatch and a second position for closing the hatch; at least three inductive electrodes, each inductive electrode being arranged on the surface of the access barrier and / or around the hatch, wherein the inductive electrodes form electrode pairs of mutual capacitance in pairs, a first group of electrode pairs and a second group of electrode pairs are distributed oppositely, and the distance between the geometric centers of the electrode shapes between the first group of electrode pairs and the second group of electrode pairs is set between 0.2 and 100 cm; a capacitance digital conversion circuit respectively coupled to each inductive electrode; a processing module coupled to the capacitance digital conversion circuit and the electric actuator.

[0010] As an improved scheme, the distance and / or area between the inductive electrodes in each group of electrode pairs are configured such that the effective sensing distance of the electric field of the mutual capacitance formed is 0.2 - 100 cm from the surface of the object where it is located.

[0011] As another improved scheme, the inductive electrodes in each group of electrode pairs are in a strip shape, a ring shape or an inserted structure.

[0012] As another improved scheme, the inductive switch drive mechanism at least includes a first inductive electrode, a second inductive electrode, and a third inductive electrode. The first inductive electrode and the second inductive electrode form a first group of electrode pairs, and the second inductive electrode and the third inductive electrode form a second group of electrode pairs; or, the inductive switch drive mechanism at least includes a first inductive electrode, a second inductive electrode, a third inductive electrode, and a fourth inductive electrode. The first inductive electrode and the second inductive electrode form a first group of electrode pairs, and the third inductive electrode and the fourth inductive electrode form a second group of electrode pairs.

[0013] As another improved scheme, it further includes a shielding ring. Each group of electrode pairs is arranged inside the shielding ring, and the shielding ring is grounded for shielding or is equipotentially shielded through the capacitance digital conversion circuit. Further, each group of electrodes is arranged on the surface of the access barrier, and the shielding ring surrounds the edge or border of the access barrier to form a coverage of the edge or border.

[0014] As another improved scheme, the access barrier and the hatch are arranged on the side wall of the accommodation space, and the first group of electrode pairs and the second group of electrode pairs are distributed oppositely left and right.

[0015] As another improvement, the access barrier opens and closes the hatch by flipping; the access barrier is provided with a first anti-pinch electrode pair arranged along the edge of the access barrier far from the rotating shaft. Further, the access barrier and the hatch are arranged on the side wall of the accommodation space, and the access barrier opens and closes by flipping up and down; the first anti-pinch electrode pair is located at the lower edge of the access barrier, and a second anti-pinch electrode pair is arranged on the surface of the access barrier along the upper edge of the access barrier and / or around the hatch. Furthermore, the access barrier is provided with a third set of electrode pairs as one of the first anti-pinch electrode pair and the second anti-pinch electrode pair, and the first set of electrode pairs and / or the second set of electrode pairs as the other; or, the first set of electrode pairs is used as the first anti-pinch electrode pair, and the second set of electrode pairs is used as the second anti-pinch electrode pair. Preferably, the electrode pairs have at least four sets forming an n-row and m-column matrix distributed on the surface of the access barrier, where n and m are integers greater than 1.

[0016] As another improvement, the access barrier and the hatch are arranged on the side wall of the accommodation space, and the access barrier opens and closes by flipping up and down; the electric actuator is a device that can be manually actuated when powered off; at least one edge of the access barrier is attracted to the hatch through a magnetic attraction structure. Among them, the device is an electromagnetic actuator, a servo motor or a stepper motor.

[0017] A door is also provided, including the above non-contact inductive switch drive mechanism.

[0018] Compared with the prior art, the structure of the present utility model forms at least two sets of mutual capacitance electrode pairs through at least three inductive electrodes, achieving anti-misoperation recognition under non-contact opening and closing of the switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1a The front structure of the inductive switch drive mechanism is given;

[0020] Figure 1b The back structure of the inductive switch drive mechanism is given;

[0021] Figure 1c The front view of the back of the inductive switch drive mechanism is given;

[0022] Figure 1d The cross-sectional view of the inductive switch drive mechanism is given;

[0023] Figure 2a An example of two sets of electrode pairs formed by three inductive electrodes is given;

[0024] Figure 2b Various examples of the arrangement of inductive electrodes are given;

[0025] Figure 2c An example of two sets of electrode pairs formed by four inductive electrodes is given;

[0026] Figure 2dFour examples of the induction electrode arrangement are given;

[0027] Figure 3 The system principle block diagram is given;

[0028] Figure 4 The mutual capacitance electric field height design is given;

[0029] Figure 5 The design position of the shielded motor is given;

[0030] Figure 6a The first arrangement mode of the electrode pair passing through the inner opening of the rotating shaft at the upper edge of the panel is given;

[0031] Figure 6b The second arrangement mode of the electrode pair is given;

[0032] Figure 6c Given Figure 6b An example of using a strip electrode arrangement;

[0033] Figure 6d The third arrangement mode is given;

[0034] Figure 6e The fourth arrangement mode is given;

[0035] Figure 7a The optimal example of the electrode arrangement structure is given;

[0036] Figure 7b The strip formation matrix structure of the electrode arrangement is given;

[0037] Figure 8a The schematic diagram of the barrel cover opening when the barrel cover opens upward is given;

[0038] Figure 8b The schematic diagram of the barrel cover closing when the barrel cover opens upward is given;

[0039] Figure 8c The schematic diagram of the barrel cover opening when the embedded barrel cover opens on the side is given; and

[0040] Figure 8d The schematic diagram of the barrel cover closing when the embedded barrel cover opens on the side is given. Specific implementation manners

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0042] The induction switch drive mechanism of the present utility model consists of an access obstacle and an electro actuator. The access obstacle can be any form of obstacle such as a door panel, a bucket lid, or even a wooden stick. At least one electro actuator drives the access obstacle to move to a first position for opening the hatch and a second position for closing the hatch. The access obstacle moves from the first position to the second position by translation or flipping. Taking the trash can in the public area as an example, Figures 1a to 1d The structural schematic of a flip-top trash can is given. 1 is the barrel body, and the barrel lid structure assembly 2 is arranged at the hatch of the barrel body, including a motor drive assembly 2.1, a barrel lid assembly 2.2, a transmission assembly 2.3, and a transmission shaft fixing part 2.4. The end of the transmission shaft 2.3.2 of the transmission assembly 2.3 is fixed by the transmission shaft fixing part 2.4, and the root is driven to rotate by the motor drive assembly 2.1, driving the barrel lid assembly 2.2 to flip. A torsion spring 2.3.1 is fixed on the transmission shaft 2.3.2 for resetting, and a limit card 2.3.3 is used to limit the maximum opening degree of the barrel lid. The barrel lid assembly 2.2 is formed by laminating a barrel lid rear cover 2.2.1, an electrode plate 2.2.2, and a barrel lid front cover 2.2.3. Inductive electrodes are arranged around the electrode plate and / or the hatch, and the action of a person throwing garbage is sensed by forming a mutual capacitance.

[0043] The number of arranged inductive electrodes is at least three. Each inductive electrode is arranged on the surface of the access obstacle and / or around the hatch. Among them, two inductive electrodes form a pair of electrodes for mutual capacitance. The first pair of electrodes and the second pair of electrodes are distributed relatively, and the distance between the geometric centers of the electrode shapes between the first pair of electrodes and the second pair of electrodes is set between 0.2 - 100 cm.

[0044] Figure 2a 、 2b Different examples of the arrangement of inductive electrodes are given. Figure 2a It at least includes a first inductive electrode 201, a second inductive electrode 202, and a third inductive electrode 203. The first inductive electrode 201 and the second inductive electrode 202 form a first pair of electrodes, and the second inductive electrode 202 and the third inductive electrode 203 form a second pair of electrodes. Among them, the second inductive electrode 202 is a common electrode, and two mutual capacitances are formed by CDC time-division switching. For example, at time T1, the electrodes 201 and 202 form a mutual capacitance, and at time T2, the electrodes 202 and 203 form a mutual capacitance.

[0045] Figure 2a In, the positions of the electrodes 201, 202, and 203 can be diverse. Such as Figure 2b shown, the three electrodes are arranged on the barrel lid assembly, or the three electrodes are arranged on the edge of the hatch, or one or two of them are on the circuit board and the other is on the edge of the hatch, as long as two mutual capacitances can be constructed.

[0046] Figure 2cIt includes at least a first induction electrode 201, a second induction electrode 202, a third induction electrode 203, and a fourth induction electrode 204. The first induction electrode 201 and the second induction electrode 202 form a first pair of electrodes, and the third induction electrode 203 and the fourth induction electrode 204 form a second pair of electrodes. Since the electrodes are not shared, the CDC forms two mutual capacitances simultaneously. Figure 2c In this case, the first pair of electrodes and the second pair of electrodes can both be arranged on the lid assembly of the bucket, or both on the edge of the hatch, or respectively on the circuit board and the hatch. Figure 2d An example where both the first pair of electrodes and the second pair of electrodes are arranged on the lid assembly of the bucket is given.

[0047] Figure 3 A system principle block diagram is given. The induction electrodes are used as sensors, and the capacitance digital conversion circuit (CDC) is respectively coupled to each induction electrode to obtain the capacitance. The processing module is coupled to the capacitance digital conversion circuit and the electro - actuator. As an example, the electro - actuator realizes the flipping of the lid assembly 2.2 through a motor, and the circuit configures a motor driving device to provide sufficient driving force. Further, a limit switch is set, and the limit switch is coupled to the processing module. When the lid assembly 2.2 is opened in place, it presses and triggers the limit switch to output an electrical signal, and the processing module controls the operation of the motor accordingly.

[0048] During normal operation, the mutual capacitance identifies the approaching object based on the difference in the dielectric of the material. When a human hand approaches within the induction electric field of the mutual capacitance, it triggers induction for opening the lid; when a human body passes by, the two mutual capacitances change sequentially, which is determined as an unconscious lid - opening operation; when a large area of the human body approaches, such as the area difference between the hand and the torso, and the torso approaches and the two mutual capacitances change simultaneously, this change mode is also identified as an unconscious lid - opening operation. By forming at least two pairs of electrodes of mutual capacitance with at least three induction electrodes, anti - false - touch recognition under non - contact opening and closing of the switch is achieved.

[0049] Most trash cans in public places are of the side - wall opening type. As an example, the access barrier and the hatch are arranged on the side wall of the accommodation space, and further designed such that the first pair of electrodes and the second pair of electrodes are distributed relatively left and right, which is conducive to the sequential change of capacitance when a human body passes by.

[0050] Figure 4It shows the design of the height of the mutual capacitance electric field. The effective sensing distance of the electric field of the mutual capacitance is affected by the distance, area between the electrodes in the electrode pair, and the dielectric constant of the medium. Under normal conditions, the medium is air. The distance and area are the main influencing factors for forming the electric field. By modifying the distance, area, or their combination, the height of the effective sensing distance of the electric field can be adjusted, such as forming different sensing heights of X, Y, and Z (X < Y < Z). Based on this, further, the distance and / or area between the sensing electrodes in each group of electrode pairs are set so that the effective sensing distance of the electric field formed by the mutual capacitance is 0.2 - 100 cm from the surface of the object where it is located, and the probability of false touch caused by the passing of the human body is further reduced by setting the effective sensing distance.

[0051] As an improvement, the sensing electrodes in each group of electrode pairs are in a strip shape, a ring shape, or an inserted structure, such as Figure 2a Adopting the strip scheme, Figure 2b Adopting the inserted structure. The advantages of the strip or ring electrodes are simple manufacturing and simple structure, while the disadvantage is that the inductive sensitivity of the formed mutual capacitance is slightly poor. The inserted mutual capacitance electrode arrangement is mainly to increase the detection range and accuracy of the capacitance, and the inductive sensitivity is improved compared with the strip or ring.

[0052] As another improvement, the inductive switch drive mechanism further includes a shielding ring. Each group of electrode pairs is arranged inside the shielding ring, and the shielding ring forms a shielding electrode, which is grounded for shielding or isopotentially shielded through a capacitance digital conversion circuit. The significance of setting the shielding ring is to shield the interference of surrounding metal substances on the mutual capacitance detection. For application scenarios where the body of an in-wall trash can is mostly made of metal, for example, it can ensure the accuracy of the mutual capacitance detection. The shape of the shielding ring is arbitrary, and it can be made of a metal material to form a surface decoration. Considering that the traditional trash can lid is made of fiberglass, the edges or borders are prone to unevenness or burrs due to the manufacturing process. Further, Figure 5 The design position of the shielding motor is exemplarily given. Each electrode is arranged on the surface of the access barrier (trash can lid), and the shielding ring 500 surrounds the edge or border of the access barrier to form a coverage of the edge or border, which not only serves as shielding but also makes the edge flat.

[0053] The access barrier can realize the opening and closing of the hatch through actions such as the translation or flipping of a door panel. Figures 1a to 1dA flip - type schematic is given. When the access obstacle opens and closes the hatch by flipping, further, a first anti - pinch electrode pair is arranged along the edge of the access obstacle away from the rotating shaft. The first anti - pinch electrode pair needs to be set on the access obstacle. During the falling and returning process, if a human hand is still inside the trash can or suddenly approaches, the mutual capacitance of the first anti - pinch electrode pair changes, controlling the hatch to move in the opposite direction to prevent pinching hands. Furthermore, when the access obstacle and the hatch are arranged on the side wall of the accommodating space, that is, for a trash can with a side - wall opening, the access obstacle opens and closes by flipping up and down. The first anti - pinch electrode pair is located at the lower edge of the access obstacle, and at the same time, a second anti - pinch electrode pair is arranged on the surface of the access obstacle along the upper edge of the access obstacle and / or around the hatch. Most trash cans with side - wall openings are inward - opening type. Figures 1a to 1d The lid panel of the trash can shown rotates inward and opens through the upper hinge. The upper edge is at the second anti - pinch electrode pair with a small rotation radius, and the lower edge is at the first anti - pinch electrode pair with a large rotation radius. When the lid panel is opened, the first anti - pinch electrode moves to the inner side of the trash can far from the human body. Since the second anti - pinch electrode pair is arranged in a range with a small rotation radius, when the lid panel is opened, the second anti - pinch electrode pair can also effectively sense the presence of a hand. When the hand leaves, the closing action is executed.

[0054] The first anti - pinch electrode pair and the second anti - pinch electrode pair can be set independently, or the first group of electrode pairs and / or the second group of electrode pairs can be multiplexed. Figures 6a to 6e The layout of various electrode pairs when the upper edge of the panel rotates inward through the rotating shaft is given. Figure 6a In [a certain situation], the first group of electrode pairs 100 and the second group of electrode pairs 200 are arranged on the upper edge of the panel, which are used for both false - touch sensing and multiplexed as the second anti - pinch electrode pair for anti - pinch function, and the first anti - pinch electrode pair 300 is independently set on the lower edge of the panel; Figure 6b In [another situation], the first group of electrode pairs 100 and the second group of electrode pairs 200 are arranged on the lower edge of the panel, which are used for both false - touch sensing and multiplexed as the first anti - pinch electrode pair for anti - pinch function, and the second anti - pinch electrode pair 400 is independently set on the upper edge of the panel; The anti - pinch electrode pair and the anti - false - touch electrode pair do not necessarily need to adopt a symmetric design, and a strip - shaped [structure] can also be used to change into Figure 6b change into Figure 6c the electrode structure; Figure 6d An example is given where the first group of electrode pairs 100 is multiplexed as the first anti - pinch electrode pair and the second group of electrode pairs 200 is multiplexed as the second anti - pinch electrode pair. The electrode pairs 100 and 200 are arranged left - right and offset up - down; Figure 6eExamples of electrode arrangements on the hatch and the panel are given. Electrodes 701 - 706 are arranged on the hatch, electrodes 707 and 708 are arranged on the panel. Electrodes 701 and 702 form the first pair of electrodes, electrodes 703 and 704 form the second pair of electrodes, and they are relatively distributed to prevent accidental touch. Electrodes 705 and 706 form the second anti-pinch electrode pair and are arranged in a range with a small rotation radius, while electrodes 707 and 708 form the first anti-pinch electrode pair and are arranged in a range with a large rotation radius to achieve anti-pinch.

[0055] Figure 7a The optimal example of the electrode arrangement structure is shown. The electrode pairs have at least four groups and form an n-row and m-column matrix distributed on the surface of the access obstacle, where n and m are integers greater than 1. In the matrix, the first pair of electrodes ①, the second pair of electrodes ②, the third pair of electrodes ③, and the fourth pair of electrodes ④ are staggered vertically and horizontally. Arranging four groups is mainly to distinguish the approach and accidental touch judgment in different areas, and it is used for both accidental touch recognition and anti-pinch according to the stage. Figure 7b The electrode arrangement is shown in a strip-shaped matrix structure.

[0056] According to the usage scenarios, there are two ways to open the lid: 1) For a conventional trash can, the opening of the bucket mouth is upward, and the lid flips inward / outward to open; 2) For an embedded trash can, the opening of the bucket mouth is to the side, and the lid flips inward / outward to open.

[0057] According to the above scenarios, the alternative solutions are as follows:

[0058] 1. When the lid of a conventional trash can opens upward, the opening method is that when a hand approaches within any mutual capacitance sensing distance, it can sense and open the lid; in this case, the situations that are prone to accidental triggering are generally approaching or crossing. The synchronous setting of the electrode sensing anti-accidental touch method is the electrode change method or the approaching distance; for example Figure 7a , when a person approaches, it will cause the edges of any one of the electrode pairs ①②, ②③, ③④, ①④ to change first, and the other electrodes do not change. At this time, it is determined as an unconscious lid-opening operation; when a person crosses, the two ends of the electrodes ①②, ③④ or ①③, ②④ change simultaneously within a short time, while the change amount of the electrode directly above is low, then it is determined as an unconscious lid-opening.

[0059] 2. When an embedded trash can opens to the side, the opening method is that when a hand approaches within any mutual capacitance sensing distance, it can sense and open the lid; generally, a person passes by or stands close in a large area; at this time, the setting of the electrode sensing anti-accidental touch method is the electrode change sequence and the contact area size; for example Figure 7a , when a person passes by, first the electrodes ①③ (or ②④) change, and then the electrodes ②④ (or ①③) change subsequently. At this time, it is determined as an unconscious lid-opening operation; when a person stands close in a large area, the electrode sensing method is that the electrodes ①②③④ change simultaneously; this change method is also recognized as an unconscious lid-opening.

[0060] In both scenarios, electrode ⑤ acts as a shielding field to prevent metal or other large-capacitance objects from accidentally triggering the device.

[0061] In the case where the access barrier and the hatch are arranged on the side wall of the accommodation space, and the access barrier is opened and closed by turning up and down, as another improvement, the electric actuator is arranged as a device that can be manually actuated when the power is off, such as an electromagnetic actuator, a servo motor or a stepper motor, etc. The motor resistance of this type of motor device that can be manually actuated when the power is off is small. In the case of power failure or system failure, if the panel is in the open high position, it will automatically fall back slowly due to gravity overcoming the motor resistance. If the panel is in the closed state, it can be manually pushed to overcome the small resistance to open it, so that it can be used when the power is off. Since the center of gravity is not at the center of gravity of the panel, it is easy to be loosely closed and have gaps when it naturally falls back due to gravity when the power is off or the system fails. To overcome this problem, at least one edge of the access barrier is attracted to the hatch through a magnetic attraction structure. As an example, the magnetic attraction structure can be realized by the cooperation of a permanent magnet and a metal.

[0062] In case of power outage or system failure;

[0063] When the conventional barrel cover opens upward, Figure 8a :The barrel cover can be opened by pressing the short axis end in an eccentric manner, and closed by pushing the long axis end. Figure 8b : Press the lid to open, and the lid will close due to the rebound force of the torsion spring after you release it;

[0064] When the side of the embedded barrel cover is open, Figure 8c : Push the lid to open, and when you let go, the lid will fall by its own gravity and be closed by the magnet. Figure 8d : Push the short shaft end to open the barrel cover, push the long shaft end to close the barrel cover and the magnet will suck it tightly.

[0065] The technical advantages of the utility model are:

[0066] (1) Proximity sensing: can sense any position of the hand approaching the garbage cover;

[0067] (2) Anti-accidental touch: It will not be triggered when a large area of human body approaches, for example, when someone walks by or stands in front of the device to wash their hands;

[0068] (3) Anti-pinch finger: If a hand suddenly approaches during the falling and returning process, the cover will move in the opposite direction and open again;

[0069] (4) Good compatibility: In an environment with metal around, the shielding layer can reduce the interference caused by the metal;

[0070] (5) Failure mechanism: When the power is off or the system function fails, the cover can be opened by hand and closed by magnetic attraction, ensuring power-off use and aesthetics.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than limiting the protection scope of the present utility model. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present utility model can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present utility model.

Claims

1. A non-contact inductive switch drive mechanism, characterized in that Comprising: An access barrier for opening and closing the hatch of the accommodation space; At least one electric actuator for driving the access barrier to move at least to a first position for opening the hatch and a second position for closing the hatch; At least three induction electrodes, each induction electrode being disposed on the surface of the access barrier and / or the periphery of the hatch, wherein the induction electrodes pairwise form electrode pairs of mutual capacitance, a first group of electrode pairs and a second group of electrode pairs are distributed oppositely, and the distance between the geometric centers of the electrode shapes between the first group of electrode pairs and the second group of electrode pairs is set between 0.2 - 100 cm; A capacitance digital conversion circuit respectively coupled to each of the induction electrodes; A processing module coupled to the capacitance digital conversion circuit and the electric actuator.

2. The non-contact inductive switch drive mechanism according to claim 1, wherein: The distance and / or area between the induction electrodes in each group of electrode pairs are configured such that the effective sensing distance of the electric field of the formed mutual capacitance is 0.2 - 100 cm from the surface of the object where it is located.

3. The non-contact inductive switch drive mechanism according to claim 1, wherein: The induction electrodes in each group of electrode pairs are in a strip shape, a ring shape or an inserted structure.

4. The non-contact inductive switch drive mechanism according to claim 1, wherein: It at least includes a first induction electrode, a second induction electrode, and a third induction electrode, the first induction electrode and the second induction electrode form the first group of electrode pairs, and the second induction electrode and the third induction electrode form the second group of electrode pairs; Or, it at least includes a first induction electrode, a second induction electrode, a third induction electrode, and a fourth induction electrode, the first induction electrode and the second induction electrode form the first group of electrode pairs, and the third induction electrode and the fourth induction electrode form the second group of electrode pairs.

5. The non-contact inductive switch drive mechanism according to claim 1, wherein: It further includes a shielding ring, each group of electrode pairs is disposed inside the shielding ring, and the shielding ring is grounded for shielding or is at the same potential for shielding through the capacitance digital conversion circuit.

6. The non-contact inductive switch drive mechanism according to claim 5, wherein: Each electrode is disposed on the surface of the access barrier, and the shielding ring surrounds the edge or frame of the access barrier to form a coverage of the edge or frame.

7. The non-contact inductive switch drive mechanism according to claim 1, characterized in that: The access barrier and the hatch are disposed on the side wall of the accommodation space, and the first group of electrode pairs and the second group of electrode pairs are distributed oppositely left and right.

8. The non-contact inductive switch drive mechanism according to claim 1, wherein: The access barrier opens and closes the hatch by flipping; The access barrier is provided with a first anti-pinch electrode pair arranged along the edge of the access barrier away from the rotating shaft.

9. The non-contact inductive switch drive mechanism according to claim 8, wherein: The access barrier and the hatch are disposed on the side wall of the accommodation space, and the access barrier opens and closes by flipping up and down; The first anti-pinch electrode pair is located at the lower edge of the access barrier, and a second anti-pinch electrode pair is disposed on the surface of the access barrier along the upper edge of the access barrier and / or the periphery of the hatch.

10. The non-contact inductive switch drive mechanism according to claim 9, wherein: The access obstacle is provided with a third pair of electrodes as one of the first anti-pinch electrode pair and the second anti-pinch electrode pair, and the first pair of electrodes and / or the second pair of electrodes as the other; Alternatively, the first pair of electrodes serves as the first anti-pinch electrode pair and the second pair of electrodes serves as the second anti-pinch electrode pair.

11. The non-contact inductive switch drive mechanism according to claim 10, wherein: The electrode pairs have at least four groups forming an n-row m-column matrix distributed on the surface of the access obstacle, where n and m are integers greater than 1.

12. The non-contact inductive switch drive mechanism according to claim 1, wherein: The access obstacle and the hatch are arranged on the side wall of the accommodation space, and the access obstacle is opened and closed by flipping up and down; The electric actuator is a device that can be manually actuated when powered off; At least one edge of the access obstacle is attracted to the hatch by a magnetic attraction structure.

13. The non-contact inductive switch drive mechanism according to claim 12, characterized in that: The device is an electromagnetic actuator, a servo motor or a stepper motor.

14. A door, characterized in that: Comprising the non-contact inductive switch drive mechanism according to any one of claims 1-13.

Images