Directional pickup camera based on sound source positioning technology

Abstract

The invention discloses a directional pickup camera based on a sound source positioning technology, and relates to the technical field of directional pickup cameras, the directional pickup camera comprises a support frame and a scraper blade, the middle of the support frame is provided with a camera main body, one side of the outside of the support frame is provided with a driving assembly for driving the camera main body, and the scraper blade is arranged on the support frame. The driving assembly comprises a servo motor, a connecting shaft, a driving roller, a conveying belt and a transmission roller. According to the directional pickup camera based on the sound source positioning technology, a transmission roller can rotate to drive a threaded rod connected with the transmission roller to rotate, and when the threaded rod rotates, an adjusting plate in threaded connection with the threaded rod moves to the outside of a supporting frame, namely, the adjusting plate is located in an auxiliary frame; the adjusting plate and the cleaning brush are in a vertical state due to rotation of the threaded rod, the scraping plate is conveniently driven to move up and down through the design of the first air rod, and therefore the cleaning brush on the outer surface of the adjusting plate is stirred in a reciprocating mode through up-down movement of the scraping plate, and cleaning of the cleaning brush is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of directional sound pickup cameras, and specifically to a directional sound pickup camera based on sound source localization technology. Background Art

[0002] Cameras, waterproof digital cameras, there are various types of cameras, and their basic working principles are the same: converting optical image signals into electrical signals for storage or transmission. When we shoot an object, the light reflected from this object is collected by the camera lens and focused on the light-receiving surface of the imaging device (such as the target surface of an image pickup tube), and then the imaging device converts the light into electrical energy, that is, the "video signal" is obtained. With the continuous development of technology, there is a directional sound pickup camera. Based on the ordinary camera, the directional sound pickup camera enhances the directivity of sound collection, can more effectively pick up the sound in the target direction, and suppress the noise in other directions.

[0003] Currently, after long-term use, dust is likely to adhere to the surface of the lens of the directional sound pickup camera, affecting the capture of the video. At the same time, it is inconvenient to protect the lens when using the camera, resulting in the lens being exposed outside for a long time and being easily damaged unnecessarily.

[0004] Therefore, in view of this, research and improvement are carried out on the existing structure and deficiencies, and a directional sound pickup camera based on sound source localization technology is proposed. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a directional sound pickup camera based on sound source localization technology, which solves the problems raised in the above background art.

[0006] To achieve the above objectives, the present invention is realized through the following technical solutions: A directional sound pickup camera based on sound source localization technology includes a support frame and a scraper. A camera body is arranged in the middle of the support frame. On one side outside the support frame, a driving component for driving the camera body is installed, and the driving component includes a servo motor, a connecting shaft, a driving roller, a conveyor belt, and a driving roller. The output end of the servo motor is installed with a connecting shaft, and a driving roller is arranged on the outer surface of the connecting shaft. The outer surface of the driving roller is installed with a conveyor belt, and a driving roller is arranged at the bottom of the conveyor belt. One end of the driving roller is installed with a cleaning component for cleaning the camera body, and the cleaning component includes a threaded rod, an adjusting plate, and a cleaning brush. The outer surface of the threaded rod is threadedly installed with an adjusting plate, and a cleaning brush is arranged on the outer surface of the adjusting plate. On the side of the support frame far from the driving component, an auxiliary frame is installed, and a pneumatic rod 1 is arranged on one side inside the auxiliary frame. The scraper is installed at the output end of the pneumatic rod 1.

[0007] Further, an ash receiving plate is slidably installed inside the auxiliary frame, and an end plate is fixedly arranged at one end of the ash receiving plate.

[0008] Further, the end plate is snap-fitted inside the bottom of the auxiliary frame, and the height of the auxiliary frame is higher than the length of the adjusting plate.

[0009] Further, a camera is installed at one end of the camera body, and a microphone is arranged outside the camera.

[0010] Further, a connecting seat is arranged at the bottom of the support frame, a chassis is installed at the bottom of the connecting seat, and a bottom shaft is arranged at the bottom of the chassis.

[0011] Further, a servo motor is arranged at the bottom of the bottom shaft, and a base is installed outside the servo motor.

[0012] Further, an adjusting component for auxiliary installation is installed inside the base, and there are two groups of adjusting components.

[0013] Further, the adjusting component includes a second air rod, a first connecting plate and a second connecting plate, and the output end of the second air rod is installed with the first connecting plate, and the first connecting plate is connected with the second connecting plate through a rubber band.

[0014] Further, an auxiliary component for adaptive clamping and height adjustment is installed at the bottom of the second connecting plate, and the auxiliary component includes a bottom plate and a clamping plate, and the clamping plate is snap-fitted and installed inside the bottom plate.

[0015] Further, the auxiliary component further includes an adapter plate and an internal groove, an adapter plate is arranged at the bottom of the clamping plate, and an internal groove is opened inside the bottom of the adapter plate.

[0016] The present invention provides a directional sound pickup camera based on sound source localization technology, and has the following beneficial effects:

[0017] 1. For the directional sound pickup camera based on sound source localization technology, the rotation of the driving roller can drive the rotation of the threaded rod connected thereto. When the threaded rod rotates, the adjusting plate threadedly connected with the threaded rod will be limited and horizontally slide at the hollow part at the bottom of the support frame. Furthermore, when the adjusting plate is in the middle area of the support frame, the camera and the microphone in the camera body will be above the adjusting plate, which is beneficial to cleaning the camera and the microphone by using the cleaning brush on the outer surface of the adjusting plate when the camera and the microphone are displaced with respect to the adjusting plate, avoiding dust adhering to the outer surfaces of the camera and the microphone after long-term use, and at the same time, when the camera body does not need to be used, the camera and the microphone in the camera body can be made to face vertically downward by adjusting the angle, which is beneficial to protecting the camera and the microphone in the camera body.

[0018] 2. The directional sound pickup camera based on the sound source localization technology can drive the rotation of the threaded rod connected to it through the rotation of the transmission roller. When the threaded rod rotates, the adjustment plate threadedly connected to the threaded rod moves to the outside of the support frame, that is, when the adjustment plate is inside the auxiliary frame, the rotation of the threaded rod makes the adjustment plate and the cleaning brush in a vertical state, which is convenient for using the design of the air rod to drive the scraper to move up and down, so that the cleaning brush on the outer surface of the adjustment plate is reciprocated by the up or down movement of the scraper, which is convenient for cleaning the cleaning brush and is conducive to reuse of the cleaning brush.

[0019] 3. The directional sound pickup camera based on the sound source localization technology is conducive to being spread and fixed according to the installation position of the directional sound pickup camera through the design of the adjustment components and the auxiliary components. In addition, the proximity and distance between the two groups of bottom plates and the connecting plates can be utilized to clamp and fix the entire directional sound pickup camera with respect to the installation area. The bottom plate and the connecting plate are fixed by the clamping plate and the built-in groove. The number of connecting plates is not limited. It is convenient to adjust the clamping area and the height of the entire directional sound pickup camera can also be adjusted, which is conducive to use in coordination with the use environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of a directional sound pickup camera based on sound source localization technology of the present invention;

[0021] Figure 2 It is a schematic structural diagram of a camera body cleaning state of a directional sound pickup camera based on sound source localization technology of the present invention;

[0022] Figure 3 It is a schematic diagram of the local structure of an auxiliary frame of a directional sound pickup camera based on sound source localization technology of the present invention;

[0023] Figure 4 It is a schematic diagram of the structure of an adjustment component of a directional sound pickup camera based on sound source localization technology of the present invention;

[0024] Figure 5 It is a schematic structural diagram of an auxiliary component of a directional sound pickup camera based on sound source localization technology of the present invention;

[0025] Figure 6 This is a schematic diagram of the structure of a driving component of a directional sound pickup camera based on sound source localization technology of the present invention;

[0026] Figure 7 The present invention is a schematic diagram of the directional sound pickup principle structure of a directional sound pickup camera based on sound source localization technology.

[0027] In the figure: 1, support frame; 2, camera body; 3, camera; 4, microphone; 5, connecting seat; 6, auxiliary frame; 7, chassis; 8, bottom shaft; 9, base; 10, cleaning component; 1001, threaded rod; 1002, adjusting plate; 1003, cleaning brush; 11, scraping plate; 12, air rod 1; 13, ash receiving plate; 14, end plate; 15, adjusting component; 1501, air rod 2; 1502, connecting plate 1; 1503, connecting plate 2; 16, auxiliary component; 1601, bottom plate; 1602, clamping plate; 1603, connecting plate; 1604, built-in groove; 17, driving component; 1701, servo motor; 1702, connecting shaft; 1703, driving roller; 1704, conveyor belt; 1705, driving roller. Detailed implementation manners

[0028] The following further describes in detail the implementation manners of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0029] As Figures 1-7As shown in the figure, the present invention provides a technical solution: a directional sound pickup camera based on sound source localization technology, which includes a support frame 1, a camera body 2, a camera 3, a microphone 4, a connection seat 5, an auxiliary frame 6, a chassis 7, a bottom shaft 8, a base 9, a cleaning component 10, a threaded rod 1001, an adjusting plate 1002, a cleaning brush 1003, a scraping plate 11, a pneumatic rod 12, an ash receiving plate 13, an end plate 14, an adjusting component 15, a pneumatic rod 1501, a connecting plate 1 1502, a connecting plate 2 1503, an auxiliary component 16, a bottom plate 1601, a clamping plate 1602, a connecting plate 1603, an internal groove 1604, a driving component 17, a servo motor 1701, a connecting shaft 1702, a driving roller 1703, a conveyor belt 1704 and a driving roller 1705. The camera body 2 is arranged in the middle of the support frame 1. One end of the camera body 2 is equipped with a camera 3, and a microphone 4 is arranged outside the camera 3. The microphone 4 adopts a shotgun microphone, a cardioid microphone, a supercardioid microphone or a microphone array and other directional microphones 4. These microphones 4 have different sensitivities to sounds from different directions. Through the directional microphone or microphone array technology, the priority pickup of sounds in a specific direction and the suppression of noises in other directions are realized. At the same time, it also has the function of image acquisition of an ordinary camera, and synchronously processes, encodes, stores or transmits the collected audio and video data. On one side outside the support frame 1, a driving component 17 for driving the camera body 2 is installed. The driving component 17 includes a servo motor 1701, a connecting shaft 1702, a driving roller 1703, a conveyor belt 1704 and a driving roller 1705. The output end of the servo motor 1701 is equipped with a connecting shaft 1702, and a driving roller 1703 is arranged on the outer surface of the connecting shaft 1702. The conveyor belt 1704 is installed on the outer surface of the driving roller 1703, and a driving roller 1705 is arranged at the bottom of the conveyor belt 1704. One end of the driving roller 1705 is equipped with a cleaning component 10 for cleaning the camera body 2. The cleaning component 10 includes a threaded rod 1001, an adjusting plate 1002 and a cleaning brush 1003. The adjusting plate 1002 is threadedly installed on the outer surface of the threaded rod 1001, and a cleaning brush 1003 is arranged on the outer surface of the adjusting plate 1002. An auxiliary frame 6 is installed on one side outside the support frame 1 away from the driving component 17, and a pneumatic rod 12 is arranged on one side inside the auxiliary frame 6. The scraping plate 11 is installed at the output end of the pneumatic rod 12. Through the design of the servo motor 1701, the connecting shaft 1702 can be driven to rotate. By rotating the connecting shaft 1702, the entire camera body 2 can be driven to rotate, which is beneficial to adjusting the audio capture range of the camera body 2. At the same time, when the connecting shaft 1702 rotates, the driving roller 1703 can be synchronously driven to rotate. Through the rotation of the driving roller 1703 and the cooperation of the conveyor belt 1704, the driving roller 1705 rotates in a follower manner. By rotating the driving roller 1705, the rotation of the threaded rod 1001 connected thereto can be driven,When the threaded rod 1001 rotates, the adjusting plate 1002 threadedly connected to the threaded rod 1001 will be limited to slide horizontally at the hollow part at the bottom of the support frame 1. Furthermore, when the adjusting plate 1002 is in the middle area of the support frame 1, the camera 3 and the microphone 4 in the camera body 2 will be above the adjusting plate 1002. This is beneficial for cleaning the camera 3 and the microphone 4 with the cleaning brush 1003 on the outer surface of the adjusting plate 1002 when the camera 3 and the microphone 4 are displaced with respect to the adjusting plate 1002, avoiding dust adhesion on the outer surfaces of the camera 3 and the microphone 4 during long-term use. At the same time, when the camera body 2 is not in use, the camera 3 and the microphone 4 in the camera body 2 can be made to face vertically downward by adjusting the angle, which is beneficial for protecting the camera 3 and the microphone 4 in the camera body 2.

[0030] As Figure 1 , Figure 2 and Figure 3 shown, a dust receiving plate 13 is slidably installed inside the auxiliary frame 6, and an end plate 14 is fixedly provided at one end of the dust receiving plate 13. The end plate 14 is snap-fitted inside the bottom of the auxiliary frame 6, and the height of the auxiliary frame 6 is higher than the length of the adjusting plate 1002. The design of the servo motor 1701 can drive the connecting shaft 1702 to rotate. By rotating the connecting shaft 1702, the entire camera body 2 can be driven to rotate, which is beneficial for adjusting the audio capture range of the camera body 2. At the same time, when the connecting shaft 1702 rotates, the driving roller 1703 can be synchronously driven to rotate. Through the rotation of the driving roller 1703 and the cooperation of the conveyor belt 1704, the driven roller 1705 rotates accordingly. By rotating the driven roller 1705, the rotation of the threaded rod 1001 connected thereto can be driven. When the threaded rod 1001 rotates and the adjusting plate 1002 threadedly connected to the threaded rod 1001 moves outside the support frame 1, that is, when the adjusting plate 1002 is inside the auxiliary frame 6, the adjusting plate 1002 and the cleaning brush 1003 will be in a vertical state due to the rotation of the threaded rod 1001, facilitating the design of the air rod 12 to drive the scraper 11 to move up and down. Thus, the cleaning brush 1003 on the outer surface of the adjusting plate 1002 can be reciprocally toggled by the up or down movement of the scraper 11, facilitating the cleaning of the cleaning brush 1003 and being beneficial for reusing the cleaning brush 1003 again. The debris after cleaning will fall back into the dust receiving plate 13, facilitating the user to pull the dust receiving plate 13 for unified cleaning.

[0031] As Figure 1 , Figure 5 and Figure 6As shown, a connecting seat 5 is provided at the bottom of the support frame 1, and a chassis 7 is installed at the bottom of the connecting seat 5, and a bottom shaft 8 is provided at the bottom of the chassis 7, and a servo motor 1701 is provided at the bottom of the bottom shaft 8, and a base 9 is installed outside the servo motor 1701, and an adjustment component 15 for auxiliary installation is installed inside the base 9, and the adjustment component 15 is provided with two groups, and the adjustment component 15 includes a gas rod 1501, a connecting plate 1502 and a connecting plate 1503, and the gas rod The output end of the second 1501 is equipped with a connecting plate 1502, and the connecting plate 1502 is connected to the connecting plate 2 1503 through a rubber belt. The bottom of the connecting plate 2 1503 is equipped with an auxiliary component 16 for adaptive clamping and height adjustment, and the auxiliary component 16 includes a bottom plate 1601 and a card plate 1602. The card plate 1602 is installed in the inner clamping of the bottom plate 1601. The auxiliary component 16 also includes a connecting plate 1603 and a built-in groove 1604. The bottom of the card plate 1602 A connecting plate 1603 is provided, and a built-in groove 1604 is opened inside the bottom of the connecting plate 1603. The design of the second gas rod 1501 can drive the connecting plate 1502 and the second connecting plate 1503 to move outward, so as to drive the entire auxiliary component 16 to extend out of the outside of the base 9, which is beneficial for stretching and fixing according to the installation position of the directional sound pickup camera. In addition, the proximity and distance between the two groups of bottom plates 1601 and the connecting plate 1603 can be utilized to clamp and fix the entire directional sound pickup camera with respect to the installation area. The bottom plate 1601 and the connecting plate 1603 are fixed by the clamping plate 1602 and the built-in groove 1604. The number of connecting plates 1603 is not limited, which is convenient for adjusting the clamping area and the height of the entire directional sound pickup camera can also be adjusted, which is beneficial for use in coordination with the use environment. At the same time, after use, the design of the second gas rod 1501 can be used to store the entire auxiliary component 16 at the bottom of the base 9.

[0032] In summary, if Figures 1-7As shown, for the directional sound pickup camera based on sound source localization technology, the microphone 4 uses a directional microphone such as a shotgun microphone, a cardioid microphone, a supercardioid microphone or a microphone array. These microphones 4 have different sensitivities to sounds from different directions. Through the directional microphone or microphone array technology, the priority pickup of sounds in a specific direction and the suppression of noises in other directions are achieved. At the same time, it also has the function of image acquisition of an ordinary camera, and synchronously processes, encodes, stores or transmits the acquired audio and video data. When in use, the design of the servo motor 1701 can drive the connecting shaft 1702 to rotate. By rotating the connecting shaft 1702, the entire camera body 2 can be driven to rotate, which is beneficial to adjusting the audio capture range of the camera body 2. At the same time, when the connecting shaft 1702 rotates, the driving roller 1703 can be synchronously driven to rotate. Through the rotation of the driving roller 1703 and the cooperation of the conveyor belt 1704, the driven roller 1705 rotates accordingly. By rotating the driven roller 1705, the rotation of the threaded rod 1001 connected to it can be driven. When the threaded rod 1001 rotates, the adjusting plate 1002 threadedly connected to the threaded rod 1001 will slide horizontally within the limit of the hollow part at the bottom of the support frame 1. Furthermore, when the adjusting plate 1002 is in the middle area of the support frame 1, the camera 3 and the microphone 4 in the camera body 2 will be above the adjusting plate 1002. This is beneficial for cleaning the camera 3 and the microphone 4 with the cleaning brush 1003 on the outer surface of the adjusting plate 1002 when the camera 3 and the microphone 4 are displaced with respect to the adjusting plate 1002, avoiding dust adhering to the outer surfaces of the camera 3 and the microphone 4 after long-term use. At the same time, when the camera body 2 is not in use, by adjusting the angle, the camera 3 and the microphone 4 in the camera body 2 can be made to face vertically downward, which is beneficial for protecting the camera 3 and the microphone 4 in the camera body 2. Then, the design of the servo motor 1701 can drive the connecting shaft 1702 to rotate. By rotating the connecting shaft 1702, the entire camera body 2 can be driven to rotate, which is beneficial to adjusting the audio capture range of the camera body 2. At the same time, when the connecting shaft 1702 rotates, the driving roller 1703 can be synchronously driven to rotate. Through the rotation of the driving roller 1703 and the cooperation of the conveyor belt 1704, the driven roller 1705 rotates accordingly. By rotating the driven roller 1705, the rotation of the threaded rod 1001 connected to it can be driven. When the threaded rod 1001 rotates and the adjusting plate 1002 threadedly connected to the threaded rod 1001 moves outside the support frame 1, that is, when the adjusting plate 1002 is inside the auxiliary frame 6, due to the rotation of the threaded rod 1001, the adjusting plate 1002 and the cleaning brush 1003 will be in a vertical state, facilitating the use of the design of the air cylinder 12 to drive the scraper 11 to move up and down. Thus, by moving the scraper 11 up or down, the cleaning brush 1003 on the outer surface of the adjusting plate 1002 can be reciprocally toggled, facilitating the cleaning of the cleaning brush 1003, which is beneficial for using the cleaning brush 1003 again. After cleaning, it will fall back into the ash receiving plate 13.It is convenient for the user to pull the dust receiving plate 13 for unified cleaning. Secondly, the design of the second gas rod 1501 can drive the connecting plate 1 1502 and the second connecting plate 1503 to move outward, so as to drive the entire auxiliary component 16 to extend out of the outside of the base 9, which is conducive to the expansion and fixation according to the installation position of the directional sound pickup camera. In addition, the proximity and distance between the two groups of bottom plates 1601 and the connecting plate 1603 can be used to clamp and fix the entire directional sound pickup camera with respect to the installation area. The bottom plate 1601 and the connecting plate 1603 are clamped and fixed by the clamping plate 1602 and the built-in groove 1604. The number of connecting plates 1603 is not limited, which is convenient for adjusting the clamping area and the height of the entire directional sound pickup camera. It is conducive to use in accordance with the use environment. At the same time, the design of the second gas rod 1501 can be used to store the entire auxiliary component 16 at the bottom of the base 9 after use.

[0033] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A directional sound pickup camera based on sound source localization technology, comprising a support frame (1) and a scraper (11), characterized in that: A camera body (2) is arranged in the middle of the support frame (1), and a driving assembly (17) for driving the camera body (2) is installed on one side of the outside of the support frame (1), and the driving assembly (17) comprises a servo motor (1701), a connecting shaft (1702), a driving roller (1703), a conveyor belt (1704) and a transmission roller (1705), the output end of the servo motor (1701) is installed with a connecting shaft (1702), and the outer surface of the connecting shaft (1702) is provided with a driving roller (1703), the outer surface of the driving roller (1703) is installed with a conveyor belt (1704), and the bottom of the conveyor belt (1704) is provided with a transmission roller (1705). A driving roller (1705) is provided at one end of the driving roller (1705) with a cleaning assembly (10) for cleaning the camera body (2), and the cleaning assembly (10) comprises a threaded rod (1001), an adjustment plate (1002) and a cleaning brush (1003), the outer surface of the threaded rod (1001) is threadedly mounted with the adjustment plate (1002), and the outer surface of the adjustment plate (1002) is provided with a cleaning brush (1003), an auxiliary frame (6) is installed on the side of the support frame (1) away from the driving assembly (17), and an air rod (12) is provided on the inner side of the auxiliary frame (6), and the scraper (11) is installed at the output end of the air rod (12).

2. The directional sound pickup camera based on sound source localization technology according to claim 1, characterized in that: A dust receiving plate (13) is slidably mounted inside the auxiliary frame (6), and an end plate (14) is fixedly mounted on one end of the dust receiving plate (13).

3. The directional sound pickup camera based on sound source localization technology according to claim 2, characterized in that: The end plate (14) is snap-fitted and arranged inside the bottom of the auxiliary frame (6), and the height of the auxiliary frame (6) is higher than the length of the adjustment plate (1002).

4. The directional sound pickup camera based on sound source localization technology according to claim 1, characterized in that: A camera head (3) is installed at one end of the camera body (2), and a microphone (4) is arranged outside the camera head (3).

5. The directional sound pickup camera based on sound source localization technology according to claim 1, characterized in that: A connecting seat (5) is provided at the bottom of the support frame (1), a bottom plate (7) is installed at the bottom of the connecting seat (5), and a bottom shaft (8) is provided at the bottom of the bottom plate (7).

6. The directional sound pickup camera based on sound source localization technology according to claim 5, characterized in that: A servo motor (1701) is provided at the bottom of the bottom shaft (8), and a base (9) is installed outside the servo motor (1701).

7. The directional sound pickup camera based on sound source localization technology according to claim 6, characterized in that: An adjustment component (15) for auxiliary installation is installed inside the base (9), and two groups of the adjustment components (15) are provided.

8. The directional sound pickup camera based on sound source localization technology according to claim 7, characterized in that: The regulating assembly (15) comprises a gas rod 2 (1501), a connecting plate 1 (1502) and a connecting plate 2 (1503), and the output end of the gas rod 2 (1501) is provided with the connecting plate 1 (1502), and the connecting plate 1 (1502) is connected to the connecting plate 2 (1503) via a rubber belt.

9. The directional sound pickup camera based on sound source localization technology according to claim 8, characterized in that: An auxiliary component (16) for adaptive clamping and height adjustment is installed at the bottom of the second connecting plate (1503), and the auxiliary component (16) includes a base plate (1601) and a clamping plate (1602), and the clamping plate (1602) is installed in the interior of the base plate (1601).

10. The directional sound pickup camera based on sound source localization technology according to claim 9, characterized in that: The auxiliary component (16) further comprises a connection plate (1603) and a built-in groove (1604); the bottom of the card plate (1602) is provided with a connection plate (1603), and the bottom of the connection plate (1603) is provided with a built-in groove (1604).

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