TOF elevator light curtain device with adjustable angle

Abstract

The invention discloses an angle-adjustable TOF elevator light curtain device which comprises a light curtain shell and a light curtain PCB installed on the inner wall of the light curtain shell, a rotatable worm is arranged on the light curtain shell, two turbine supports are arranged on the top of the light curtain PCB, and the turbine supports are arranged on the top of the light curtain PCB. A rotating turbine meshed with the worm is arranged between the two turbine supports, a pluggable base is arranged at the top of the rotating turbine, and an angle-adjustable TOF sensor is installed at the top of the base. By starting the servo motor, the worm can drive the rotating turbine to rotate, and the rotating turbine can drive the TOF sensor to rotate, so that the angle of the TOF sensor is adjusted, the TOF sensor can achieve three-gear adjustment, the TOF detection angle can be adjusted according to the width size of an elevator door, and the safety detection function is achieved; and the functions of the light curtain and the TOF can be realized only by mounting the light curtain and the TOF in one time, so that the detection precision and the detection range are improved.

Description

Technical Field

[0001] The invention relates to the technical field of elevator light curtains, and in particular to a TOF elevator light curtain device capable of adjusting an angle. Background Art

[0002] The elevator light curtain is a light-type elevator door safety protection device, which is suitable for passenger elevators and freight elevators to protect the safety of passengers. It consists of four parts: an infrared transmitter and receiver installed on both sides of the elevator car door, a power box installed on the top of the car, and a special flexible cable. There are 32 (16) infrared transmitting tubes in the transmitter. Under the control of the MCU, the transmitting and receiving tubes are turned on in sequence, and the car door area is continuously scanned from top to bottom to form a dense infrared protection light curtain. When any beam of light is blocked, the control system immediately outputs a door opening signal, and the car door stops closing and reverses to open. The elevator door can only be closed normally after the passenger or the obstruction leaves the warning area, thereby achieving the purpose of safety protection, which can avoid the occurrence of elevator pinching accidents. The existing elevator door closing protection system uses a light curtain as a sensing device. The light curtain judges whether there is any obstruction through the infrared reception situation. Once blocked, it notifies the elevator door machine to open the door to avoid pinching pedestrians. The working principle of the existing light curtain is that the infrared ray is only emitted between the two doors, and the infrared ray will pass through transparent objects, which makes it impossible to detect transparent objects such as glass. The protection can only be triggered when the obstruction reaches the middle of the door and blocks the infrared ray. It is impossible to detect people or objects outside the door (when someone carries transparent objects such as glass, the glass enters the elevator car, but the person is still outside); and the detection accuracy of the light curtain is poor. When the obstruction is less than 30mm, it will not be able to detect. This makes it impossible to effectively identify objects such as ropes, fingers, small arms, etc., which leads to occasional fingers being pinched by the elevator door, posing a major safety hazard.

[0003] In order to improve the detection accuracy, it is necessary to increase the infrared emitting and receiving devices of the light curtain. In order to increase the detection range (area outside the door), a TOF sensor needs to be installed separately, which greatly increases the cost. For this reason, we provide a TOF elevator light curtain device with adjustable angle. Summary of the invention

[0004] The object of the present invention is to provide a TOF elevator light curtain device with adjustable angle to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a TOF elevator light curtain device with adjustable angle, comprising a light curtain housing, and a light curtain PCB board installed on the inner wall of the light curtain housing, the light curtain housing is provided with a rotatable worm, the top of the light curtain PCB board is arranged on two turbine brackets, a rotating turbine meshing with the worm is arranged between the two turbine brackets, a pluggable base is arranged on the top of the rotating turbine, and a TOF sensor with adjustable angle is installed on the top of the base, the TOF sensor can be adjusted as needed, and the angle of the TOF sensor is adjusted by driving the rotating turbine through the worm.

[0006] Preferably, it also includes a servo motor, which is installed on the light curtain housing and corresponds to the position of the worm. The right end of the servo motor output shaft penetrates the light curtain housing and extends into the interior thereof. The right end of the servo motor output shaft is fixedly connected to the left end of the worm shaft. The servo motor drives the worm to rotate through the output shaft, and the worm drives the rotating turbine to rotate.

[0007] Preferably, both ends of the bottom of the turbine bracket penetrate the light curtain PCB board and extend to the outside thereof, and both ends of the bottom of the turbine bracket are welded to the light curtain PCB board. An annular groove is provided on the opposite sides of the two turbine brackets, and the turbine bracket is used to support the rotating turbine.

[0008] Preferably, an annular plate is rotatably contacted on the inner wall of the annular groove, and a rotating shaft is installed on the inner wall of the rotating turbine. The end of the rotating shaft close to the annular groove passes through the annular groove and extends into the interior thereof, and the end of the rotating shaft close to the annular plate is fixedly connected to the annular plate. By providing the annular groove and the annular plate, the stability of the rotating shaft and the rotating turbine during rotation is improved.

[0009] Preferably, an annular limit block is installed on the surface of the annular plate, and an annular limit groove is opened on the inner wall of the annular groove and at the position corresponding to the annular limit block. The annular limit block passes through the annular limit groove on one side close to the annular limit groove and extends to the inside of the annular limit groove to rotate in contact with the inner wall of the annular limit groove. By providing the annular limit groove and the annular limit block, the stability of the rotational movement of the annular plate in the annular groove is improved.

[0010] Preferably, an annular positioning groove is provided on the side of the annular plate away from the rotating shaft, and an annular positioning block is installed on the inner wall of the annular groove and at a position corresponding to the annular positioning groove. The end of the annular positioning block close to the annular positioning groove passes through the annular positioning groove and extends to the inside of the annular positioning groove to rotate in contact with the inner wall of the annular positioning groove. By providing the annular positioning block and the annular positioning groove, the stability of the rotational movement of the annular plate in the annular groove is improved.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] The present invention starts the servo motor so that the worm can drive the rotating turbine to rotate, and the rotating turbine can drive the TOF sensor to rotate, so as to adjust the angle of the TOF sensor. The TOF sensor can be adjusted in three gears. The TOF detection angle can be adjusted according to the width of the elevator door to realize the safety detection function to adapt to elevator doors of different widths. The functions of the light curtain and TOF can be realized by installing it only once, thereby improving the detection accuracy and detection range. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0014] Figure 2 It is a structural cross-sectional view of the front view of the present invention;

[0015] Figure 3 It is a structural cross-sectional view of a turbine support, a rotating turbine and a rotating shaft side view of the present invention;

[0016] Figure 4 It is a structural cross-sectional view of a side view of a turbine support, an annular positioning groove and an annular positioning block of the present invention;

[0017] Figure 5 It is a structural cross-sectional view of the rotating turbine, base, clamping block, clamping groove and fastening bolt front view of the present invention;

[0018] Figure 6 This is a structural diagram of the detection area of ​​the elevator light curtain and TOF sensor of the present invention;

[0019] Figure 7 It is a structural diagram of the detection area of ​​an elevator light curtain in the prior art;

[0020] Figure 8 It is a structural diagram of the detection signal line of the elevator light curtain and TOF sensor of the present invention.

[0021] In the figure: 1 light curtain housing, 2 light curtain PCB board, 3 worm, 4 turbine bracket, 5 rotating turbine, 6 base, 7 TOF sensor, 8 servo motor, 9 annular groove, 10 annular plate, 11 rotating shaft, 12 annular limit block, 13 annular limit groove, 14 annular positioning groove, 15 annular positioning block, 16 slot, 17 insert block, 18 pull block, 19 card block, 20 card slot, 21 slide groove, 22 slider, 23 fastening bolt. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] See also Figure 1-8 A TOF elevator light curtain device with adjustable angle includes a light curtain housing 1, and a light curtain PCB board 2 installed on the inner wall of the light curtain housing 1, a rotatable worm 3 is arranged on the light curtain housing 1, and the top of the light curtain PCB board 2 is arranged on two turbine brackets 4, and a rotating turbine 5 meshing with the worm 3 is arranged between the two turbine brackets 4, and a pluggable base 6 is arranged on the top of the rotating turbine 5, and a TOF sensor 7 with adjustable angle is fixedly connected to the top of the base 6.

[0024] Furthermore, the communication line of the TOF sensor 7 is connected to the light curtain PCB board 2 .

[0025] It also includes a servo motor 8, which is installed on the light curtain housing 1 and corresponds to the position of the worm 3. The right end of the output shaft of the servo motor 8 passes through the light curtain housing 1 and extends into the interior thereof. The right end of the output shaft of the servo motor 8 is fixedly connected to the left end of the rotating shaft of the worm 3.

[0026] The two ends of the bottom of the turbine bracket 4 penetrate the light curtain PCB board 2 and extend to the outside thereof, and the two ends of the bottom of the turbine bracket 4 are welded to the light curtain PCB board 2. An annular groove 9 is provided on the opposite side of the two turbine brackets 4. An annular plate 10 is rotatably contacted on the inner wall of the annular groove 9. A rotating shaft 11 is fixedly connected to the inner wall of the rotating turbine 5. One end of the rotating shaft 11 close to the annular groove 9 penetrates the annular groove 9 and extends to the inside thereof. One end of the rotating shaft 11 close to the annular plate 10 is fixedly connected to the annular plate 10. An annular limit block 12 is fixedly connected to the surface of the annular plate 10. An annular limiting groove 13 is provided on the inner wall at a position corresponding to the annular limiting block 12, and the side of the annular limiting groove 13 close to the annular limiting groove 13 passes through the annular limiting groove 13 and extends to the inside thereof to rotate in contact with the inner wall of the annular limiting groove 13; an annular positioning groove 14 is provided on the side of the annular plate 10 away from the rotating shaft 11, and an annular positioning block 15 is fixedly connected on the inner wall of the annular groove 9 at a position corresponding to the annular positioning groove 14, and the end of the annular positioning block 15 close to the annular positioning groove 14 passes through the annular positioning groove 14 and extends to the inside thereof to rotate in contact with the inner wall of the annular positioning groove 14.

[0027] Furthermore, a slot 16 is provided at the bottom of the base 6, and an insert block 17 is fixedly connected to the top of the rotating turbine 5 and the position corresponding to the slot 16. The top of the insert block 17 passes through the slot 16 and extends to the inside thereof and contacts the inner wall of the slot 16. A pull block 18 is provided on the left side of the base 6, and the right side of the pull block 18 contacts the left side of the base 6. A card block 19 is fixedly connected to the right side of the pull block 18. A card slot 20 is provided on the left side of the insert block 17 and the position corresponding to the card block 19. The right side of the card block 19 passes through the base 6, the slot 16 and the card slot 20 from left to right in sequence and extends to the inside of the card slot 20 and contacts the card slot. The inner walls of 20 are in contact with each other, a slide groove 21 is provided inside the base 6 and at the bottom of the plug block 17, a slider 22 that slides in contact with the slide groove 21 is fixedly connected to the bottom of the plug block 17, and a fastening bolt 23 that is threadedly connected to the base 6 is provided on the left side of the pull block 18. By arranging the slot 16, the plug block 17, the pull block 18, the clamping block 19, the clamping groove 20, the slide groove 21, the slider 22 and the fastening bolt 23, it is convenient to install the base 6 on the rotating turbine 5, and the TOF sensor 7 and the base 6 can be easily disassembled from the rotating turbine 5 for maintenance and overhaul at a later time, thereby improving their service life.

[0028] Furthermore, by providing the slide groove 21 and the slider 22, the stability of the block 19 when moving left and right is improved.

[0029] Specifically, loosen the fastening bolt 23, then pull the pull block 18 to the left, the pull block 18 drives the clamping block 19 to move to the left, so that the clamping block 19 and the clamping slot 20 are separated, and then pull the base 6 upward, the base 6 drives the slot 16 to move upward and separate from the insert block 17, and the base 6 and the rotating turbine 5 can be disassembled.

[0030] By starting the servo motor 8, the worm 3 can drive the rotating turbine 5 to rotate, and the rotating turbine 5 can drive the TOF sensor 7 to rotate, so as to adjust the angle of the TOF sensor 7. The TOF sensor 7 can be adjusted in three gears. The TOF detection angle can be adjusted according to the width of the elevator door to realize the safety detection function to adapt to elevator doors of different widths. The functions of the light curtain and TOF can be realized by installing it only once, thereby improving the detection accuracy and detection range.

[0031] When in use, start the servo motor 8, which drives the worm 3 to rotate through the output shaft, and the worm 3 drives the rotating turbine 5 to rotate. The rotating turbine 5 drives the TOF sensor 7 to rotate around the rotating axis 11 through the base 6, and the rotating axis 11 drives the annular plate 10 to rotate in the annular groove 9, thereby changing the angle of the TOF sensor 7 until it is adjusted to the desired state. The rotating turbine 5 and the worm 3 have a self-locking effect, and can fix the angle of the TOF sensor 7 after rotation.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A TOF elevator light curtain device with adjustable angle, characterized in that: The invention comprises a light curtain housing (1), and a light curtain PCB board (2) mounted on the inner wall of the light curtain housing (1); a rotatable worm (3) is arranged on the light curtain housing (1); the top of the light curtain PCB board (2) is arranged on two turbine brackets (4); a rotating turbine (5) meshing with the worm (3) is arranged between the two turbine brackets (4); a pluggable base (6) is arranged on the top of the rotating turbine (5); and a TOF sensor (7) with an adjustable angle is installed on the top of the base (6).

2. The angle-adjustable TOF elevator light curtain device according to claim 1, characterized in that: It also includes a servo motor (8), which is mounted on the light curtain housing (1) and corresponds to the position of the worm (3), the right end of the output shaft of the servo motor (8) passes through the light curtain housing (1) and extends into the interior thereof, and the right end of the output shaft of the servo motor (8) is fixedly connected to the left end of the rotating shaft of the worm (3).

3. The angle-adjustable TOF elevator light curtain device according to claim 2, characterized in that: The two ends of the bottom of the turbine bracket (4) penetrate the light curtain PCB board (2) and extend to the outside thereof, the two ends of the bottom of the turbine bracket (4) are welded to the light curtain PCB board (2), and an annular groove (9) is provided on opposite sides of the two turbine brackets (4).

4. The angle-adjustable TOF elevator light curtain device according to claim 3, characterized in that: An annular plate (10) is rotatably contacted on the inner wall of the annular groove (9), and a rotating shaft (11) is mounted on the inner wall of the rotating turbine (5). An end of the rotating shaft (11) close to the annular groove (9) penetrates the annular groove (9) and extends into the interior of the annular groove, and an end of the rotating shaft (11) close to the annular plate (10) is fixedly connected to the annular plate (10).

5. The angle-adjustable TOF elevator light curtain device according to claim 4, characterized in that: An annular limit block (12) is installed on the surface of the annular plate (10), an annular limit groove (13) is opened on the inner wall of the annular groove (9) and at a position corresponding to the annular limit block (12), and the annular limit block (12) passes through the annular limit groove (13) on one side close to the annular limit groove (13) and extends to the inside thereof to rotate in contact with the inner wall of the annular limit groove (13).

6. The angle-adjustable TOF elevator light curtain device according to claim 5, characterized in that: An annular positioning groove (14) is provided on one side of the annular plate (10) away from the rotating shaft (11); an annular positioning block (15) is installed on the inner wall of the annular groove (9) and at a position corresponding to the annular positioning groove (14); an end of the annular positioning block (15) close to the annular positioning groove (14) penetrates the annular positioning groove (14) and extends to the inside thereof to rotate in contact with the inner wall of the annular positioning groove (14).

Images