A two-dimensional laser light

Abstract

The utility model discloses a two -dimensional laser lamp, including base, first angle adjusting mechanism and second angle adjusting mechanism, base: its upside fixedly connected with the apron, the upside of apron is equipped with the U type turning box, the inside rotation of U type turning box is connected with laser host computer through second support axle, first angle adjusting mechanism: it includes first sliding rail, first screw rod, first sliding block, first rack plate, first support axle and first gear, the downside rear of base is fixedly connected with first sliding rail, the inside sliding connection of first sliding rail has first sliding block, the upside fixedly connected with first rack plate of first sliding block, the middle part rotation of apron is connected with first support axle through bearing, the lower extreme fixedly connected with first gear of first support axle, and first rack plate is engaged with first gear, and the inside rotation of first sliding rail has first screw rod, this two -dimensional laser lamp changes the direction of light, satisfies the lighting demand of different scene.

Description

Technical Field

[0001] This utility model relates to the field of two-dimensional laser light technology, specifically a two-dimensional laser light. Background Technology

[0002] Two-dimensional laser lights are optical devices with YAG solid-state lasers as their core. They use krypton lamps to pump Nd:YAG crystal rods to generate 1064nm fundamental frequency light, which is converted into 532nm visible green light through frequency doubling technology. The light is then scanned by a computer-controlled galvanometer to form text or graphics. They are mainly divided into two categories: industrial and entertainment, and are widely used in stage performances, outdoor advertising, and landmark projection.

[0003] In existing technologies, ordinary laser lights are like fixed-point controls, and the effect depends entirely on the user's installation position and angle. However, there are some problems with the use of such fixed-installation ordinary interactive all-in-one machines. For example, the installation position is fixed, there are strict requirements for projection distance and angle, the debugging process is cumbersome, and problems such as image distortion or insufficient brightness may occur. At the same time, fixed installation limits the size and position of the interactive area, which may affect the user experience and make it difficult to meet diverse interactive needs. Therefore, we propose a two-dimensional laser light. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a two-dimensional laser light that can change the direction of light to meet the lighting needs of different scenarios, and can effectively solve the problems in the background technology.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a two-dimensional laser light, comprising a base, a first angle adjustment mechanism, and a second angle adjustment mechanism; Base: A cover plate is fixedly connected to its upper side, and a U-shaped rotating box is provided on the upper side of the cover plate. The laser host is rotatably connected inside the U-shaped rotating box through a second support shaft. First angle adjustment mechanism: It includes a first slide rail, a first lead screw, a first slider, a first rack plate, a first support shaft and a first gear. The first slide rail is fixedly connected to the rear side of the lower side wall of the base. The first slider is slidably connected inside the first slide rail. The first rack plate is fixedly connected to the upper side of the first slider. The first support shaft is rotatably connected to the middle of the cover plate through a bearing. The first gear is fixedly connected to the lower end of the first support shaft. The first rack plate is meshed with the first gear. The first lead screw is rotatably connected inside the first slide rail. The threaded surface of the first lead screw is threadedly connected to the middle of the first slider. The second angle adjustment mechanism is located inside the U-shaped rotating box and changes the direction of the light to meet the lighting needs of different scenarios.

[0006] Furthermore, a controller is provided on the front side of the base. The input end of the laser host is electrically connected to the output end of the controller, and the input end of the controller is electrically connected to an external power source to control the normal operation of each electrical appliance.

[0007] Furthermore, the first angle adjustment mechanism also includes a first motor and a first angle sensor. The first motor is fixedly connected to the left end of the first slide rail, and the output shaft of the first motor is fixedly connected to the left end of the first lead screw. The first angle sensor is fixedly connected to the middle of the lower side wall of the base. The measuring axis of the first angle sensor is fixedly connected to the lower end of the first support shaft. The first angle sensor is bidirectionally electrically connected to the controller to realize the function of precisely adjusting the orientation of the light source laterally.

[0008] Furthermore, the second angle adjustment mechanism includes a second slide rail, a second lead screw, a sliding seat, a top rod, a vertical moving rod, a rectangular slide cylinder, a second rack plate, a second gear, and a limiting rod. The second slide rails are symmetrically and fixedly connected to the middle of the lower side wall of the U-shaped rotating box. The two second slide rails are fixedly connected to each other. Sliding seats are slidably connected inside each of the second slide rails. Top rods are rotatably connected inside each of the two sliding seats. Second lead screws are rotatably connected inside each of the two second slide rails. The external thread surfaces of the two second lead screws are threadedly connected to the middle of the sliding seats located in the same second slide rail. The two second lead screws are fixedly connected to each other. The two second lead screws are connected in opposite directions. Rectangular slide cylinders are fixedly connected to the left and right walls of the U-shaped rotating box. Vertical moving rods are slidably connected inside the two rectangular slide cylinders. The lower ends of the two vertical moving rods are rotatably connected to the upper ends of the top rods located on the same side. Second rack plates are fixedly connected to the upper sides of the two vertical moving rods. Second gears are fixedly sleeved on the outer arc surfaces of the two second support shafts. The two second gears are meshed with the second rack plates located on the same side. Limit rods are fixedly connected to the front sides of the outer arc surfaces of the two second support shafts to realize the function of vertical angle adjustment.

[0009] Furthermore, a second motor is fixedly connected to the left side of the second slide rail. The output shaft of the second motor is fixedly connected to the left end of the second lead screw on the left side. The input end of the second motor is electrically connected to the output end of the controller to provide power for vertical angle adjustment.

[0010] Furthermore, the left and right sides of the U-shaped rotating box are respectively fixedly connected to side plates. A second angle sensor is fixedly connected to the upper side of the left side plate. The measuring axis of the second angle sensor is fixedly connected to the left end of the second support axis on the left side. The second angle sensor is bidirectionally electrically connected to the controller to realize the function of precisely controlling the orientation of the light source.

[0011] Furthermore, a camera is provided on the lower front side of the laser host, and the camera is bidirectionally electrically connected to the controller, allowing the operator to determine the position of the light in real time.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This two-dimensional laser lamp has the following advantages: 1. The controller is equipped with encoders and sensors to monitor the position and status of the interactive host in real time, ensuring the accuracy and stability of the movement.

[0013] 2. The camera can capture the movements of participants in the interactive game. Through intelligent processing on the control panel, the angle, speed, and direction of the light head can be precisely adjusted to achieve a chasing effect in accordance with the movements of the participants. 3. The first support shaft and the rotating second support shaft device are equipped with high-precision transmission components and high-torque stepper motors, which can independently and precisely control the angle of the laser beam. The second support shaft supports rotation from 150° to 150°, and the first support shaft supports rotation from 360° to -360°, changing the direction of the beam to meet the lighting needs of different scenarios. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a partial cross-sectional structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the structure of the present invention in an explosion. Figure 4 This is an enlarged structural diagram of point A in this utility model; Figure 5 This is an enlarged structural diagram of section B of the present invention; Figure 6 This is an enlarged structural diagram of point C in this utility model.

[0015] In the diagram: 1. Base, 2. Cover plate, 3. U-shaped rotating box, 4. Laser host, 5. First angle adjustment mechanism, 51. First slide rail, 52. First lead screw, 53. First slider, 54. First rack plate, 55. First support shaft, 56. First gear, 57. First motor, 58. First angle sensor, 6. Second angle adjustment mechanism, 61. Second slide rail, 62. Second lead screw, 63. Sliding seat, 64. Top rod, 65. Vertical moving rod, 66. Rectangular slide cylinder, 67. Second rack plate, 68. Second gear, 69. Limiting rod, 7. Second motor, 8. Second angle sensor, 9. Side plate, 10. Camera, 11. Controller. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-6 This embodiment provides a technical solution: a two-dimensional laser light, including a base 1, a first angle adjustment mechanism 5, and a second angle adjustment mechanism 6; Base 1: A cover plate 2 is fixedly connected to its upper side. A U-shaped rotating box 3 is provided on the upper side of the cover plate 2. The laser host 4 is rotatably connected inside the U-shaped rotating box 3 through a second support shaft. A controller 11 is provided on the front side of the base 1. The input end of the laser host 4 is electrically connected to the output end of the controller 11. The input end of the controller 11 is electrically connected to an external power source. A camera 10 is provided on the lower front side of the laser host 4. The camera 10 is bidirectionally electrically connected to the controller 11. When the two-dimensional laser light is needed, the controller 11 can be adjusted to operate the laser host 4 and project light. The first angle adjustment mechanism 5 includes a first slide rail 51, a first lead screw 52, ​​a first slider 53, a first rack plate 54, a first support shaft 55, and a first gear 56. The first slide rail 51 is fixedly connected to the rear side of the lower side wall of the base 1. The first slider 53 is slidably connected inside the first slide rail 51. The first rack plate 54 is fixedly connected to the upper side of the first slider 53. The middle part of the cover plate 2 is rotatably connected to the first support shaft 55 through a bearing (the cover plate 2 is fixed to the upper end of the base 1, and the rotating part of the first support shaft 55 is supported by a sealed bearing to prevent external dirt from entering the interior of the base 1 and contaminating the internal transmission parts and sensors). The lower end of the first support shaft 55 is fixedly connected to... The first gear 56 is meshed with the first rack plate 54. The first slide rail 51 is rotatably connected to the first lead screw 52. The threaded surface of the first lead screw 52 is threadedly connected to the middle of the first slider 53. (The left and right walls of the first slide rail 51 are respectively fixedly connected to bellows. The ends of the two bellows are fixedly connected to the outer surface of the first slider 53. The bellows seal the exposed threaded surface of the first lead screw 52, ​​and when the first slider 53 moves left and right, the two bellows adaptively extend and retract to prevent contamination of the surface of the first lead screw 52.) The first angle adjustment mechanism 5 also includes a first motor 57 and a first angle sensor 58. The first motor 57 is fixedly connected to the first angle adjustment mechanism 58. At the left end of the slide rail 51, the output shaft of the first motor 57 is fixedly connected to the left end of the first lead screw 52. A first angle sensor 58 is fixedly connected to the middle of the lower side wall of the base 1. The measuring shaft of the first angle sensor 58 is fixedly connected to the lower end of the first support shaft 55. The first angle sensor 58 is bidirectionally electrically connected to the controller 11. When it is necessary to adjust the direction of the projected light, the controller 11 can be adjusted, the first motor 57 will run, and the output shaft of the first motor 57 will rotate in both directions, thereby driving the first slider 53 to move left and right within the first slide rail 51, thereby driving the first rack plate 54 to adjust its left and right position. At this time, the first gear 56 will be driven to rotate. It should be noted that when the first slide rail 51 moves the first rack plate 54 to the leftmost position, the first gear 56 will drive the first support shaft 55 to rotate 360° clockwise. When the first slide rail 51 moves the first rack plate 54 to the rightmost position, the first gear 56 will drive the first support shaft 55 to rotate 360° counterclockwise. This means that the U-shaped rotating box 3 rotates around the first support shaft 55 by an angle between 360° and -360°. During this period, the controller 11 controls the first angle sensor 58. The first angle sensor 58 measures the rotation angle of the first support shaft 55 in real time and feeds the angle information back to the controller 11 in real time, so as to realize the lateral angle change of the projected light. The second angle adjustment mechanism 6 is located inside the U-shaped rotating box 3. The second angle adjustment mechanism 6 includes a second slide rail 61, a second lead screw 62, a sliding seat 63, a top rod 64, a vertical moving rod 65, a rectangular slide cylinder 66, a second rack plate 67, a second gear 68, and a limiting rod 69. The second slide rails 61 are symmetrically and fixedly connected to the middle of the lower side wall of the U-shaped rotating box 3. The two second slide rails 61 are fixedly connected to each other. Sliding seats 63 are slidably connected inside each of the second slide rails 61. Top rods 64 are rotatably connected inside each of the two sliding seats 63. Second lead screws 62 are rotatably connected inside each of the two second slide rails 61. The external thread surfaces of the two second lead screws 62 are threadedly connected to the middle of the sliding seats 63 located within the same second slide rail 61. The two lead screws 62 are fixedly connected, and their threads are in opposite directions. (The inner walls of the two second slide rails 61 are respectively fixedly connected with bellows. The ends of the four bellows are respectively fixedly connected to the outer surface of the sliding seat 63 located in the same second slide rail 61. The bellows seal the exposed surface of the second lead screw 62 and adapt to the expansion and contraction as the sliding seat 63 moves left and right, protecting the exposed thread surface of the second lead screw 62.) The left and right walls of the U-shaped rotating box 3 are respectively fixedly connected with rectangular slide cylinders 66. The interiors of the two rectangular slide cylinders 66 are respectively slidably connected with vertical moving rods 65. The lower ends of the two vertical moving rods 65 are respectively rotatably connected to the upper ends of the top rods 64 located on the same side. The upper sides of the two vertical moving rods 65 are respectively fixedly connected to... A second rack plate 67 is attached, and two second support shafts have two second gears 68 fixedly mounted on their outer arc surfaces. The two second gears 68 mesh with the second rack plate 67 located on the same side. Limit rods 69 are fixedly connected to the front sides of the outer arc surfaces of the two second support shafts. A second motor 7 is fixedly connected to the left side of the second slide rail 61. The output shaft of the second motor 7 is fixedly connected to the left end of the second lead screw 62 on the left side. The input end of the second motor 7 is electrically connected to the output end of the controller 11. Side plates 9 are fixedly connected to the left and right sides of the U-shaped rotating box 3 (the side plates 9 seal the left and right sides of the U-shaped rotating box to prevent external dirt from entering the interior of the U-shaped rotating box and contaminating the transmission parts and sensors). A second angle is fixedly connected to the upper side of the left side plate 9. Sensor 8, the measuring axis of the second angle sensor 8, is fixedly connected to the left end of the second support shaft on the left side. The second angle sensor 8 is bidirectionally electrically connected to the controller 11, at which point the controller 11 can be controlled, the second motor 7 can be operated, and the output shaft of the second motor 7 can rotate in both directions, thereby driving the two second lead screws 62 to rotate synchronously in both directions, thereby driving the two sliding seats 63 to move closer or further apart. When the two sliding seats 63 move further apart, the two push rods 64 will simultaneously push the vertical moving rod 65 upward, thereby driving the two second rack plates 67 to move upward simultaneously. During the upward movement of the two second rack plates 67, the two second gears 68 will simultaneously rotate counterclockwise, thereby driving the two second support shafts to rotate.This causes the laser host 4 to rotate counterclockwise around the central axis of the second support shaft. To rotate the laser host 4 clockwise, the two sliding seats 63 can be brought closer together. At this time, the laser host 4 rotates clockwise around the central axis of the second support shaft. It should be noted that the rotation angle of the second support shaft is between 150° and -150°. Whenever the second support shaft rotates 150° clockwise or counterclockwise, the outer arc surface of the limit rod 69 will push against the outer arc surface of the U-shaped rotating box 3, limiting its maximum rotation angle to between 150° and -150°, thus changing the vertical orientation of the laser host 4. During this period, the second angle sensor 8 measures the rotation angle of the second support shaft (both the first angle sensor 58 and the second angle sensor 8 are potentiometer-type angle sensors, essentially "rotatable sliding rheostats," which change the position of the sliding end through mechanical rotation, thereby changing the output voltage to achieve the correspondence between angle and voltage, and includes 3 pins (power supply Vc). c. A ring-shaped resistor (with uniformly distributed resistance) and a sliding brush connected to the rotating shaft (contacting the resistor and rotating with the shaft) are connected. A fixed DC voltage is applied to both ends of the resistor. When the sensor shaft rotates, the sliding brush moves on the resistor, changing the resistance value from the brush to the ground. According to Ohm's law, the output voltage Vout = Vcc × (resistance from the brush to GND / total resistance). Since the resistor has uniform resistance, Vout is linearly related to the rotation angle. The controller 11 reads Vout and calculates the rotation angle, then feeds the angle information back to the controller 11 in real time to control the vertical direction of the projected light. During this time, the camera 10 feeds back the real-time captured image to the controller 11. The camera 10 can capture the movements of the participants in the interactive game. Through the intelligent processing of the controller 11, the rotation angle, speed, and direction of the light head can be precisely adjusted according to the movements of the participants to achieve a chasing effect.

[0018] The working principle of the two-dimensional laser lamp provided by this utility model is as follows: When the two-dimensional laser lamp is needed, the controller 11 can be adjusted to operate the laser host 4, which projects light. When it is necessary to adjust the direction of the projected light, the controller 11 can be adjusted to operate the first motor 57. The output shaft of the first motor 57 rotates in both directions, thereby driving the first slider 53 to move left and right within the first slide rail 51, which in turn drives the first rack plate 54 to adjust its left and right position. At this time, the first gear 56 will be driven to rotate. It should be noted that when the first slide rail 51 moves the first rack plate 54 to the leftmost position, the first gear 56 will drive the first support shaft 55 to rotate 360° clockwise. When the slide rail 51, carrying the first rack plate 54, moves to the far right, the first gear 56 will drive the first support shaft 55 to rotate counterclockwise by 360°. This indicates that the U-shaped rotating box 3 rotates around the first support shaft 55 by an angle between 360° and -360°. During this period, the controller 11 controls the first angle sensor 58, which measures the rotation angle of the first support shaft 55 in real time and feeds the angle information back to the controller 11 in real time, thus realizing the lateral angle change of the projected light. At this time, the controller 11 can be adjusted to operate the second motor 7. The output shaft of the second motor 7 rotates in both directions, thereby driving the two second lead screws 62 to rotate synchronously in both directions, which in turn drives the two sliding seats 63 to move in opposite directions. When the two sliding seats 63 move away from each other, the two push rods 64 simultaneously push the vertical moving rod 65 upward, thereby causing the two second rack plates 67 to move upward simultaneously. During the upward movement of the two second rack plates 67, the two second gears 68 rotate counterclockwise simultaneously, thereby causing the two second support shafts to rotate, and thus causing the laser host 4 to rotate counterclockwise around the central axis of the second support shaft. If you want the laser host 4 to rotate clockwise, you can control the two sliding seats 63 to move closer together. At this time, the laser host 4 will rotate clockwise around the central axis of the second support shaft. It should be noted that the rotation angle of the second support shaft is between 150° and -150°. Between 150° and -150°, whenever the second support shaft rotates 150° clockwise or counterclockwise, the outer arc surface of the limit rod 69 will push against the outer arc surface of the U-shaped rotating box 3, limiting its maximum rotation angle to between 150° and -150°, changing the vertical orientation of the laser host 4. During this period, the second angle sensor 8 measures the rotation angle of the second support shaft and feeds the angle information back to the controller 11 in real time, thereby controlling the vertical orientation of the projected light. During this period, the camera 10 feeds back the real-time captured image to the controller 11. The camera 10 can capture the movements of the people participating in the interactive game. Through the intelligent processing of the controller 11, the rotation angle, speed and direction of the lamp head can be precisely adjusted according to the movements of the people participating in the interactive game to achieve a chasing effect.

[0019] It is worth noting that the core chip of the controller 11 disclosed in the above embodiments is a PLC microcontroller, specifically the STM32. The laser host 4, the first motor 57, the first angle sensor 58, the second motor 7, the second angle sensor 8, and the camera 10 can be freely configured according to the actual application scenario. It is recommended that the laser host 4 be a stage laser host of model LB-KM05, the first motor 57 and the second motor 7 be two-phase stepper motors of model 42J1860-417-01, the first angle sensor 58 and the second angle sensor 8 be angle sensors of model ASRS22, and the camera 10 be a camera of model S250E. The controller 11 controls the operation of the laser host 4, the first motor 57, the first angle sensor 58, the second motor 7, the second angle sensor 8, and the camera 10 using methods commonly used in the prior art.

[0020] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A two-dimensional laser light, characterized in that: Includes a base (1), a first angle adjustment mechanism (5), and a second angle adjustment mechanism (6); Base (1): A cover plate (2) is fixedly connected to its upper side. A U-shaped rotating box (3) is provided on the upper side of the cover plate (2). The laser host (4) is rotatably connected inside the U-shaped rotating box (3) through the second support shaft. First angle adjustment mechanism (5): It includes a first slide rail (51), a first lead screw (52), a first slider (53), a first rack plate (54), a first support shaft (55), and a first gear (56). The first slide rail (51) is fixedly connected to the rear side of the lower side wall of the base (1). The first slider (53) is slidably connected inside the first slide rail (51). The first rack plate (54) is fixedly connected to the upper side of the first slider (53). The first support shaft (55) is rotatably connected to the middle part of the cover plate (2) through a bearing. The first gear (56) is fixedly connected to the lower end of the first support shaft (55). The first rack plate (54) is meshed with the first gear (56). The first lead screw (52) is rotatably connected inside the first slide rail (51). The threaded surface of the first lead screw (52) is threadedly connected to the middle part of the first slider (53). The second angle adjustment mechanism (6) is located inside the U-shaped rotating box (3).

2. A two-dimensional laser light according to claim 1, characterized in that: The base (1) is equipped with a controller (11) on the front side. The input end of the laser host (4) is electrically connected to the output end of the controller (11), and the input end of the controller (11) is electrically connected to an external power source.

3. A two-dimensional laser light according to claim 2, characterized in that: The first angle adjustment mechanism (5) further includes a first motor (57) and a first angle sensor (58). The first motor (57) is fixedly connected to the left end of the first slide rail (51). The output shaft of the first motor (57) is fixedly connected to the left end of the first lead screw (52). The first angle sensor (58) is fixedly connected to the middle of the lower side wall of the base (1). The measuring shaft of the first angle sensor (58) is fixedly connected to the lower end of the first support shaft (55). The first angle sensor (58) is bidirectionally electrically connected to the controller (11).

4. A two-dimensional laser light according to claim 2, characterized in that: The second angle adjustment mechanism (6) includes a second slide rail (61), a second lead screw (62), a sliding seat (63), a top rod (64), a vertical moving rod (65), a rectangular slide cylinder (66), a second rack plate (67), a second gear (68), and a limiting rod (69). The second slide rail (61) is symmetrically and fixedly connected to the middle of the lower side wall of the U-shaped rotating box (3). The two second slide rails (61) are fixedly connected to each other. The sliding seats (63) are slidably connected inside the second slide rails (61). The top rods (64) are rotatably connected inside the two sliding seats (63). The second lead screws (62) are rotatably connected inside the two second slide rails (61). The external thread surfaces of the two second lead screws (62) are respectively connected to the sliding seats (64) located in the same second slide rail (61). 3) The middle threaded connection is fixed between the two second lead screws (62), the thread directions of the two second lead screws (62) are opposite, the left and right walls of the U-shaped rotating box (3) are fixedly connected with rectangular slide cylinders (66), the interior of the two rectangular slide cylinders (66) is slidably connected with vertical moving rods (65), the lower ends of the two vertical moving rods (65) are rotatably connected to the upper ends of the top rods (64) located on the same side, the upper sides of the two vertical moving rods (65) are fixedly connected with second rack plates (67), the outer arc surfaces of the two second support shafts are fixedly sleeved with second gears (68), the two second gears (68) are meshed with the second rack plates (67) located on the same side, and the front sides of the outer arc surfaces of the two second support shafts are fixedly connected with limit rods (69).

5. A two-dimensional laser light according to claim 4, characterized in that: The second slide rail (61) is fixedly connected to the left side of the second motor (7). The output shaft of the second motor (7) is fixedly connected to the left end of the second lead screw (62) on the left side. The input end of the second motor (7) is electrically connected to the output end of the controller (11).

6. A two-dimensional laser light according to claim 4, characterized in that: The left and right sides of the U-shaped rotating box (3) are respectively fixedly connected to side plates (9). The upper side of the left side plate (9) is fixedly connected to a second angle sensor (8). The measuring axis of the second angle sensor (8) is fixedly connected to the left end of the second support axis on the left side. The second angle sensor (8) is bidirectionally electrically connected to the controller (11).

7. A two-dimensional laser light according to claim 2, characterized in that: The laser host (4) is equipped with a camera (10) on the lower front side, and the camera (10) is bidirectionally electrically connected to the controller (11).

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