CN213445661U - Elevator and gesture calling device thereof - Google Patents
Elevator and gesture calling device thereof Download PDFInfo
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- CN213445661U CN213445661U CN202022218664.9U CN202022218664U CN213445661U CN 213445661 U CN213445661 U CN 213445661U CN 202022218664 U CN202022218664 U CN 202022218664U CN 213445661 U CN213445661 U CN 213445661U
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Abstract
The utility model provides an elevator and a gesture calling device thereof, wherein the gesture calling device comprises a gesture input unit, a gesture control unit, a voice playing unit, a visual feedback unit and an elevator control unit; one end of the gesture input unit is connected with the gesture control unit, the other end of the gesture input unit is used for being connected with external equipment, one end of the visual feedback unit is connected with the gesture control unit, the other end of the visual feedback unit is used for being connected with display equipment, the voice playing unit is connected with the gesture control unit, one end of the elevator control unit is connected with the gesture control unit, and the other end of the elevator control unit is used for being connected with an outside-hall calling unit. The utility model discloses can install additional fast on old elevator for old elevator can call the elevator through the gesture, has effectively avoided the mode that the button called the elevator.
Description
Technical Field
The utility model relates to an elevator control field, concretely relates to elevator and gesture calling device thereof.
Background
In the existing elevator control field, most of elevator control modes or elevator calling modes are triggered by keys, namely, corresponding functions can be realized by pressing the corresponding keys. However, due to the influence of new crown epidemic situations at home and abroad, diseases are easily spread by the traditional key triggering mode, and therefore, a mode of calling an elevator in a non-contact manner is needed.
At present, only a few elevator manufacturers have released elevators with a function of calling elevators by gestures, but only installation of new elevators is limited, and old elevators are not supported, so that a non-contact type elevator calling mode applied to old elevators is not provided at present.
SUMMERY OF THE UTILITY MODEL
The utility model provides an elevator and gesture calling device thereof, it can solve old elevator and install gesture calling device's compatibility problem additional for can install gesture calling device on old elevator additional fast, thereby realize calling the elevator through the gesture.
In a first aspect, the utility model provides a gesture calling device, which comprises a gesture input unit, a gesture control unit, a voice playing unit, a visual feedback unit and an elevator control unit; one end of the gesture input unit is connected with the gesture control unit, the other end of the gesture input unit is used for being connected with external equipment, one end of the visual feedback unit is connected with the gesture control unit, the other end of the visual feedback unit is used for being connected with display equipment, the voice playing unit is connected with the gesture control unit, one end of the elevator control unit is connected with the gesture control unit, and the other end of the elevator control unit is used for being connected with an outside-hall calling unit; the external equipment is used for sensing gesture actions of a user and sending the gesture actions to the gesture input unit, the gesture input unit is used for recognizing the gesture actions, converting the gesture actions into analog signals which can be recognized by the elevator control unit and sending the analog signals to the gesture control unit, and after receiving the analog signals, the gesture control unit sends control signals to the voice playing unit, the visual feedback unit and the elevator control unit according to the content of the analog signals, so that the voice playing unit, the visual feedback unit and the elevator control unit execute corresponding instructions.
Furthermore, a preset gesture is arranged in the gesture input unit, so that the gesture input unit converts an instruction corresponding to the preset gesture into an analog signal and sends the analog signal to the gesture control unit.
Further, the gesture control unit is an MCU.
Furthermore, the gesture input unit comprises a gesture input subunit and a gesture recognition unit, one end of the gesture input subunit is used for being connected with the external device, the other end of the gesture input subunit is connected with the gesture recognition unit, and the other end of the gesture recognition unit is connected with the gesture control unit.
Furthermore, the visual feedback unit comprises a plurality of LED circuits, and each LED circuit is electrically connected with the gesture control unit.
Furthermore, the elevator control unit comprises an uplink bidirectional optical coupling circuit and a downlink bidirectional optical coupling circuit, one end of the uplink bidirectional optical coupling circuit is electrically connected with the uplink circuit of the hall call unit, and the other end of the uplink bidirectional optical coupling circuit is electrically connected with the uplink control end of the gesture control unit; one end of the downlink bidirectional optical coupling circuit is electrically connected with the downlink circuit of the hall calling unit, and the other end of the downlink bidirectional optical coupling circuit is electrically connected with the downlink control end of the gesture control unit.
Furthermore, the uplink bidirectional optical coupler circuit and the downlink bidirectional optical coupler circuit respectively comprise a first diode, a second diode, a third diode, a fourth diode, a fifth diode, a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor and a photoelectric coupler; the anode of the first diode is electrically connected with the cathode of the second diode, the cathode of the first diode is respectively electrically connected with the cathode of the third diode, the anode of the fifth diode and one end of the second resistor, the anode of the second diode and the anode of the fourth diode are electrically connected with one end of the first resistor, the anode of the third diode and the cathode of the fourth diode are electrically connected with the elevator power supply, the other end of the second resistor and the cathode of the fifth diode are electrically connected with the photoelectric coupler, the other end of the first resistor is electrically connected with the photoelectric coupler, the third resistor is connected with the photoelectric coupler in parallel, one pin of the photoelectric coupler is respectively electrically connected with one end of the first capacitor and one end of the fourth resistor, and the other pin of the photoelectric coupler is respectively electrically connected with the other end of the first capacitor and the common end, the other end of the fourth resistor is electrically connected with an external power supply; in the uplink bidirectional optocoupler circuit, the anode of the first diode and the cathode of the second diode are also electrically connected with an uplink circuit of the hall call unit, and one pin of the optocoupler and one end of the first capacitor are also electrically connected with an uplink control end of the gesture control unit; in the downlink bidirectional optocoupler circuit, the anode of the first diode and the cathode of the second diode are electrically connected with a downlink circuit of the hall call unit, and one pin of the optocoupler and one end of the first capacitor are electrically connected with a downlink control end of the gesture control unit.
Further, the first resistor, the second resistor, the third resistor and the fourth resistor are all adjustable resistors.
Further, the fifth diode and the seventh diode are photodiodes, and the sixth diode is a zener diode.
In a second aspect, the present invention further provides an elevator, wherein the elevator comprises the gesture calling device, and the gesture calling device comprises any one of the above-mentioned devices.
The utility model discloses an elevator and gesture calling device thereof, it can be connected elevator control system and this gesture calling device through elevator control unit, thereby can be quick install this gesture calling device additional on old elevator, and then can collect user's gesture action and convert user's gesture action into analog signal and send to gesture control unit through gesture input unit, rethread gesture control unit discerns analog signal, with control signal to the speech playback unit of sending the difference, vision feedback unit and elevator control unit, and then control elevator accomplishes gesture calling elevator, user contact elevator has been avoided, convenience and security have been improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without any creative effort.
Fig. 1 is a block diagram of a gesture call device according to an embodiment of the present invention;
fig. 2 is a block diagram of a gesture call device according to another embodiment of the present invention;
fig. 3 is a circuit diagram of a bidirectional optical coupler of the gesture call device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should be further understood that the term "and/or" as used in the specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
In addition, the directional terms of the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", and the like, refer to the attached drawings and the direction of the usage of the product. Accordingly, the directional terms used are used for describing and understanding the present invention, and are not used for limiting the present invention. Further, in the drawings, structures that are similar or identical are denoted by the same reference numerals.
Referring to fig. 1, a block diagram of a gesture call device 10 according to the present invention is shown. As shown in the figure, it includes a gesture input unit 11, a gesture control unit 12, a voice playing unit 13, a visual feedback unit 14 and an elevator control unit 15;
one end of the gesture input unit 11 is connected with the gesture control unit 12, the other end of the gesture input unit is used for connecting with an external device 16, one end of the visual feedback unit 14 is connected with the gesture control unit 12, the other end of the visual feedback unit is used for connecting with a display device 17, the voice playing unit 13 is connected with the gesture control unit 12, one end of the elevator control unit 15 is connected with the gesture control unit 12, and the other end of the elevator control unit is used for connecting with an outside-hall call unit 18; the external device 16 is configured to sense a gesture of a user and send the gesture to the gesture input unit 11, the gesture input unit 11 is configured to recognize the gesture, convert the gesture into an analog signal that can be recognized by the elevator control unit 15, and send the analog signal to the gesture control unit 12, after receiving the analog signal, the gesture control unit 12 sends a control signal to the voice playing unit 13, the visual feedback unit 14, and the elevator control unit 15 according to the content of the analog signal, so that the voice playing unit 13, the visual feedback unit 14, and the elevator control unit 15 execute corresponding instructions.
The external device 16 may be an infrared sensor, which senses a gesture of a user through infrared, and is correspondingly disposed inside and outside the elevator, and the gesture input unit 11 may recognize the gesture of the user and convert the gesture into an analog signal recognizable by the gesture control unit 12 after receiving the gesture of the user, and then send the analog signal to the gesture control unit 12 so that the gesture control unit 12 sends a corresponding control signal according to the analog signal. The gesture control unit 12 is mainly used for sending a control signal to control the voice playing unit 13, the visual feedback unit 14 and the elevator control unit 15, and the voice playing unit 13 is used for reminding a user that the gesture control unit 12 has received the voice of the user so as to avoid the user from sending repeated voice; the visual feedback unit 14 is used for feeding back corresponding information following the gesture action of the user; the elevator control unit 15 is connected to an outside-hall call unit 18, and is mainly used for controlling whether to go up or down by gesture motions when a user waits for an elevator outside the elevator. Therefore, when the gesture control unit 12 receives the analog signal, different control signals are sent according to the content of the analog signal.
For example, when a user is in an elevator, the key usually needed by the user is to close the door or open the door, so that the user can set the hand waving left to close the door or waving right to open the door in advance, and the user can stand in front of the external device 16 to wave left, the external device 16 collects the gesture movement of waving left by the user and sends the gesture movement to the gesture input unit 11, when the gesture input unit 11 receives the gesture movement, the gesture movement is recognized and judged to wave left, and then converted into an analog signal and sent to the gesture control unit 12, the gesture control unit 12 receives the analog signal and sends a control signal to the visual feedback unit 14 and the voice playing unit 13, after receiving the control signal sent by the gesture control unit 12, the visual feedback unit 14 sends the control signal to the display device 17, and controls the display device 17 to light up from right to left, the user is reminded of the received gesture motion as waving the hand leftwards, meanwhile, the voice playing unit 13 plays voice contents of closing the elevator door and please wait, and the specific voice contents can be set according to actual conditions, and then the gesture control unit 12 sends out a control signal to control the elevator to close the door.
When a user is located outside the elevator and waits for the elevator, the keys generally required by the user are up-going or down-going, so that the gesture action of up-going can be set as upward waving, the gesture action of down-going can be set as downward waving, when the user wants to go upstairs, the user can wave upward, the external device 16 receives the gesture action of the user and then sends the gesture action to the gesture input unit 11, the gesture input unit 11 receives and recognizes the gesture action and then converts the gesture action into an analog signal and sends the analog signal to the gesture control unit 12, the gesture control unit 12 sends a control signal to the visual feedback unit 14 and the voice playing unit 13, the visual feedback unit 14 sends the control signal to the display device 17 after receiving the control signal sent by the gesture control unit 12, and controls the display device 17 to light up in sequence from bottom to top to remind the user of the received gesture action as upward waving, meanwhile, the voice playing unit 13 plays voice contents such as "please wait", and the gesture control unit 12 sends a control signal to control the user to go to the floor where the user is located.
In some embodiments, for example, in this embodiment, a preset gesture is set in the gesture input unit 11, so that the gesture input unit 11 converts an instruction corresponding to the preset gesture into an analog signal and sends the analog signal to the gesture control unit 12.
The preset gesture may be many-to-one, for example, gesture actions such as "wave hand left" and "wave hand right" are all corresponding to the key that is closed, so that when the gesture input unit 11 receives the gesture actions, the gesture actions are converted into analog signals according to the corresponding relationship of the preset gesture, and the analog signals are sent to the gesture control unit 12.
In a further embodiment, the gesture control unit 12 is a MCU.
The gesture control unit 12 may be an MCU (micro control unit).
Referring to fig. 2, in some embodiments, for example, in this embodiment, the gesture input unit 11 includes a gesture input subunit 111 and a gesture recognition unit 112, one end of the gesture input subunit 111 is used to connect to the external device 16, the other end thereof is connected to the gesture recognition unit 112, and the other end of the gesture recognition unit 112 is connected to the gesture control unit 12.
The gesture input subunit 111 is configured to transmit a gesture motion of a user, the gesture recognition unit 112 is configured to recognize the received gesture motion and convert the gesture motion into an analog signal to be sent to the gesture control unit 12, the gesture input subunit 111 may be a gesture sensor, the gesture recognition unit 112 may be a device having a gesture recognition chip, and in some embodiments, the gesture input subunit 111 and the gesture recognition unit 112 may be a two-in-one device.
In some embodiments, such as the present embodiment, the visual feedback unit 14 includes a plurality of LED circuits, each of which is electrically connected to the gesture control unit 12.
Wherein, every LED circuit all links to each other with gesture control unit 12 electrical property, controls different LED lamps respectively, and gesture control unit 12 can adopt the interval to send when sending control signal and giving the LED circuit, sends control signal for different LED circuits at certain time interval promptly to reach the effect of horse race lamp, thereby remind the user what kind of gesture action has been received.
In some embodiments, for example, in this embodiment, the elevator control unit 15 includes an uplink bidirectional optical coupler circuit and a downlink bidirectional optical coupler circuit, one end of the uplink bidirectional optical coupler circuit is electrically connected to the uplink circuit of the hall call unit 18, and the other end of the uplink bidirectional optical coupler circuit is electrically connected to the uplink control end of the gesture control unit 12; one end of the downlink bidirectional optical coupling circuit is electrically connected with the downlink circuit of the hall call unit 18, and the other end of the downlink bidirectional optical coupling circuit is electrically connected with the downlink control end of the gesture control unit 12.
Wherein, for the sake of convenience install on old elevator fast the utility model provides a gesture calling device 10 is equipped with two-way opto-coupler circuit and two-way opto-coupler circuit down on going in elevator control unit 15. The hall call unit 18 is generally used for controlling an up button and a down button outside an elevator, and different elevator manufacturers have different circuit structures, so that in order to install the gesture call device 10 without knowing the elevator circuit, a bidirectional optical coupling circuit is used as a medium for connecting the gesture control unit and the hall call unit 18, and the failure of an elevator internal system is ensured not to be caused under any condition.
The uplink bidirectional optical coupling circuit is used for connecting an uplink circuit in the hall call unit 18 and an uplink control end in the gesture control unit 12, so that the gesture control unit 12 can control the uplink circuit of the hall call unit 18 through the uplink bidirectional optical coupling circuit, and therefore operation of a user for pressing an uplink key is simulated, the downlink bidirectional optical coupling circuit is used for connecting a downlink circuit in the hall call unit 18 and a downlink control end in the gesture control unit 12, so that the gesture control unit 12 can control the downlink circuit of the hall call unit 18 through the downlink bidirectional optical coupling circuit, and accordingly operation of the user for pressing a downlink key is simulated.
Referring to fig. 3, in some embodiments, for example, in the present embodiment, each of the upstream bidirectional optical coupler circuit and the downstream bidirectional optical coupler circuit includes a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a fifth diode D5, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first capacitor C1, and a photocoupler T1; an anode of the first diode D1 and a cathode of the second diode D2 are electrically connected, a cathode of the first diode D1 is electrically connected with a cathode of the third diode D3, an anode of the fifth diode D5 and one end of the second resistor R2, an anode of the second diode D2 and an anode of the fourth diode D4 are electrically connected with one end of the first resistor R1, an anode of the third diode D3 and a cathode of the fourth diode D4 are electrically connected with an elevator POWER supply POWER, another end of the second resistor R2 and a cathode of the fifth diode D5 are electrically connected with the photocoupler T1, another end of the first resistor R1 is electrically connected with the photocoupler, the third resistor R3 is connected in parallel with the photocoupler, one pin of the photocoupler T1 is electrically connected with the first capacitor C1 and one end of the fourth resistor R4, the other pin of the fourth resistor R4 is electrically connected to the other end of the first capacitor C1 and the common terminal GND, respectively, and the other end of the fourth resistor R4 is electrically connected to the external power VCC; in the uplink bidirectional optocoupler circuit, the anode of the first diode D1 and the cathode of the second diode D2 are further electrically connected with an uplink circuit of the hall call unit 18, and one pin of the optocoupler T1 and one end of the first capacitor C1 are further electrically connected with an uplink control end of the gesture control unit 12; in the downlink bidirectional optical coupler circuit, the anode of the first diode D1 and the cathode of the second diode D2 are further electrically connected to a downlink circuit of the hall call unit 18, and one pin of the photoelectric coupler T1 and one end of the first capacitor C1 are further electrically connected to a downlink control end of the gesture control unit 12.
The photocoupler T1 is used for isolating the power supply of the elevator system from the power supply of the gesture calling device 10, so that the normal operation of the elevator system is not affected under any condition, the uplink bidirectional optocoupler circuit and the downlink bidirectional optocoupler circuit are respectively adopted to control the uplink and the downlink of the elevator, the normal operation of the elevator is further ensured not to be affected, and the gesture control unit 12 is ensured to normally control the uplink and the downlink of the elevator.
In a further embodiment, the first resistor R1, the second resistor R2, the third resistor R3 and the fourth resistor R4 are all adjustable resistors.
The first resistor R1, the second resistor R2, the third resistor R3 and the fourth resistor R4 are set to be adjustable resistors, and later maintenance and repair are facilitated.
In a further embodiment, the fifth diode D5 is a photodiode.
Wherein the photosensitive diode is used for photoelectric isolation so as to isolate the power supply of an elevator system and the power supply of a device for calling an elevator by voice and ensure the safety of a circuit.
The utility model also discloses an elevator, the elevator be equipped with in any embodiment among the above-mentioned embodiment gesture calling device 10.
The utility model discloses an elevator and gesture calling device thereof receives the gesture action that the user sent through the gesture input unit, and discern the gesture action and change, then analog signal after will changing sends the unit to gesture control, and then makes gesture control unit send control signal to pronunciation broadcast unit, elevator control unit and visual feedback unit, thereby realizes calling elevator through the gesture action, simultaneously, can also call the unit connection outside elevator control unit and the room through elevator control unit, makes can be on old elevator quick installation the utility model provides a voice calling elevator's device need not demolish old elevator and can realize voice calling elevator's function, has improved convenience and security.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope of the present invention, and these modifications or replacements should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A gesture calling device applied to an elevator is characterized by comprising: the device comprises a gesture input unit, a gesture control unit, a voice playing unit, a visual feedback unit and an elevator control unit;
one end of the gesture input unit is connected with the gesture control unit, the other end of the gesture input unit is used for being connected with external equipment, one end of the visual feedback unit is connected with the gesture control unit, the other end of the visual feedback unit is used for being connected with display equipment, the voice playing unit is connected with the gesture control unit, one end of the elevator control unit is connected with the gesture control unit, and the other end of the elevator control unit is used for being connected with an outside-hall calling unit;
the external equipment is used for sensing gesture actions of a user and sending the gesture actions to the gesture input unit, the gesture input unit is used for recognizing the gesture actions, converting the gesture actions into analog signals which can be recognized by the elevator control unit and sending the analog signals to the gesture control unit, and after receiving the analog signals, the gesture control unit sends control signals to the voice playing unit, the visual feedback unit and the elevator control unit according to the content of the analog signals, so that the voice playing unit, the visual feedback unit and the elevator control unit execute corresponding instructions.
2. The gesture call device according to claim 1, wherein a preset gesture is set in the gesture input unit so that the gesture input unit converts an instruction corresponding to the preset gesture into an analog signal and sends the analog signal to the gesture control unit.
3. The gesture call device according to claim 2, wherein the gesture control unit is an MCU.
4. The gesture call device according to claim 1, wherein the gesture input unit comprises a gesture input subunit and a gesture recognition unit, one end of the gesture input subunit is used for being connected with the external device, the other end of the gesture input subunit is connected with one end of the gesture recognition unit, and the other end of the gesture recognition unit is connected with the gesture control unit.
5. The gesture call device according to claim 1, wherein the visual feedback unit comprises a plurality of LED circuits, each of the LED circuits being electrically connected to the gesture control unit.
6. The gesture calling device according to claim 1, wherein the elevator control unit comprises an uplink bidirectional optical coupler circuit and a downlink bidirectional optical coupler circuit, one end of the uplink bidirectional optical coupler circuit is electrically connected with an uplink circuit of the hall call unit, and the other end of the uplink bidirectional optical coupler circuit is electrically connected with an uplink control end of the gesture control unit; one end of the downlink bidirectional optical coupling circuit is electrically connected with the downlink circuit of the hall calling unit, and the other end of the downlink bidirectional optical coupling circuit is electrically connected with the downlink control end of the gesture control unit.
7. The gesture calling device according to claim 6, wherein the up bidirectional optical coupling circuit and the down bidirectional optical coupling circuit each comprise a first diode, a second diode, a third diode, a fourth diode, a fifth diode, a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor, and an opto-coupler;
the anode of the first diode is electrically connected with the cathode of the second diode, the cathode of the first diode is respectively electrically connected with the cathode of the third diode, the anode of the fifth diode and one end of the second resistor, the anode of the second diode and the anode of the fourth diode are electrically connected with one end of the first resistor, the anode of the third diode and the cathode of the fourth diode are electrically connected with the elevator power supply, the other end of the second resistor and the cathode of the fifth diode are electrically connected with the photoelectric coupler, the other end of the first resistor is electrically connected with the photoelectric coupler, the third resistor is connected with the photoelectric coupler in parallel, one pin of the photoelectric coupler is respectively electrically connected with one end of the first capacitor and one end of the fourth resistor, and the other pin of the photoelectric coupler is respectively electrically connected with the other end of the first capacitor and the common end, the other end of the fourth resistor is electrically connected with an external power supply;
in the uplink bidirectional optocoupler circuit, the anode of the first diode and the cathode of the second diode are also electrically connected with an uplink circuit of the hall call unit, and one pin of the optocoupler and one end of the first capacitor are also electrically connected with an uplink control end of the gesture control unit;
in the downlink bidirectional optocoupler circuit, the anode of the first diode and the cathode of the second diode are electrically connected with a downlink circuit of the hall call unit, and one pin of the optocoupler and one end of the first capacitor are electrically connected with a downlink control end of the gesture control unit.
8. The gesture call device according to claim 7, wherein the first resistor, the second resistor, the third resistor, and the fourth resistor are all adjustable resistors.
9. The gesture call device according to claim 8, wherein said fifth diode is a photodiode.
10. Elevator, characterized in that it comprises the gesture call device, which is the gesture call device according to any of claims 1-9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022218664.9U CN213445661U (en) | 2020-09-30 | 2020-09-30 | Elevator and gesture calling device thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022218664.9U CN213445661U (en) | 2020-09-30 | 2020-09-30 | Elevator and gesture calling device thereof |
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| CN213445661U true CN213445661U (en) | 2021-06-15 |
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