High-definition recording and broadcasting all-in-one machine

Abstract

The utility model belongs to the technical field of recording and broadcasting all-in-one machines, and discloses a high-definition recording and broadcasting all-in-one machine which comprises a base, a top plate and a high-definition recording and broadcasting all-in-one machine body, a supporting column is installed on the upper surface of the base, a U-shaped protective cover is arranged on the upper surface of the supporting column, and the top plate is installed on the upper surface of the U-shaped protective cover. Through holes are formed in the inner walls of the left side and the right side of the U-shaped protective cover, positioning mechanisms for limiting the moving range of the high-definition recording and broadcasting all-in-one machine body are installed in the two sets of through holes of the U-shaped protective cover, and adjusting mechanisms for driving the high-definition recording and broadcasting all-in-one machine body to rotate are arranged on the left side and the right side of each positioning mechanism. The positioning mechanism internal driving assembly is arranged between the U-shaped protective cover and the top plate, so that the U-shaped protective cover and the top plate shield and protect the positioning mechanism driving assembly, and the situation that the positioning mechanism is damaged due to the fact that the positioning mechanism internal driving assembly is collided in the using process is avoided as much as possible.

Description

Technical Field

[0001] The utility model relates to the technical field of integrated recording and broadcasting machines, and in particular to a high-definition integrated recording and broadcasting machine. Background Art

[0002] With the rapid development of information technology, the media and intelligent multimedia teaching, multimedia conferencing industries are developing rapidly, the amount of video recording and broadcasting is increasing, and the requirements for recording quality are also getting higher and higher. The recording and broadcasting devices currently used to complete the directing and recording functions include switchers, camera control systems, mixing consoles, fully automatic video recorders, editing machines, television and network live broadcast systems, monitors, and streaming media encoders.

[0003] For example, the utility model with announcement number CN219198572U discloses an integrated recording and broadcasting machine, in particular to a fully automatic high-definition integrated recording and broadcasting machine, comprising a base, a support platform is connected to the top of the base through a lifting mechanism, a support is rotatably arranged above the support platform, cavities are opened on both sides of the support, a motor cavity is arranged in the middle of the support, a first motor is arranged on the bottom wall of the motor cavity, two first transmission wheels are sleeved on the output shaft of the first motor, a movable plate is movably connected in the cavity, a fixed frame is inherently provided on one side of the movable plate, a second transmission wheel is movably connected in the fixed frame, the surface of the second transmission wheel is transmission-connected to the first transmission wheel through a belt, one end of the movable plate is inherently provided with a spring, the other end of the spring is fixedly connected to the inner wall of the cavity, the top of the movable plate extends to the top of the support, and a recording and broadcasting body is placed above the support. The utility model is convenient for adjusting the angle and height of the recording and broadcasting machine, the recording and broadcasting effect is good, and the recording and broadcasting body is easy to separate from the support, the disassembly effect is good, and it is easy to use.

[0004] In the process of implementing this application, it was found that the technology has the following problems: most of the existing high-definition video recorder and broadcaster bodies use a driving motor to drive a belt to pull a positioning plate to position the high-definition video recorder and broadcaster body on the upper end of the support table, which requires the belt to be replaced regularly during the long-term use of the high-definition video recorder and broadcaster body, thereby increasing the use cost of the device and reducing the practicality of the device.

[0005] For this purpose, a high-definition recording and broadcasting integrated machine is proposed. Utility Model Content

[0006] The purpose of the utility model is to solve the problem that most of the existing high-definition video recorder and broadcaster bodies use a driving motor to drive a belt to pull a positioning plate to position the high-definition video recorder and broadcaster body on the upper end of a support table, so that the high-definition video recorder and broadcaster body needs to have the belt replaced regularly during long-term use, thereby increasing the use cost of the device. The utility model provides a high-definition video recorder and broadcaster.

[0007] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical solutions:

[0008] The high-definition video recorder and broadcaster comprises a base, a top plate and a high-definition video recorder and broadcaster body. A support column is installed on the upper surface of the base, a U-shaped protective cover is arranged on the upper surface of the support column, the top plate is installed on the upper surface of the U-shaped protective cover, through holes are provided on the left and right inner walls of the U-shaped protective cover, positioning mechanisms for limiting the moving range of the high-definition video recorder and broadcaster body are installed inside the two groups of through holes of the U-shaped protective cover, and adjustment mechanisms for driving the high-definition video recorder and broadcaster body to rotate are arranged on the left and right sides of the positioning mechanism.

[0009] Furthermore, the positioning mechanism includes a motor and a bidirectional threaded rod, the motor is installed at the bottom of the inner wall of the U-shaped protective cover, the bidirectional threaded rod is rotatably connected to the two groups of through holes of the U-shaped protective cover, the outer surface of the bidirectional threaded rod is fixedly installed with a bevel gear 2, the external teeth of the bevel gear 2 are meshingly connected with a bevel gear 1, the lower surface of the bevel gear 1 is installed on the output shaft of the motor, the external threads of the bidirectional threaded rod are connected with two groups of sliders, the upper surface of the top plate is provided with a slot, the top ends of the two groups of sliders are slidably connected to the slots of the top plate, and the upper surfaces of the two groups of sliders are installed with limit plates, and the left and right sides of the high-definition recording and broadcasting all-in-one machine body are attached to the adjacent side of the two groups of limit plates.

[0010] Furthermore, the adjustment mechanism includes two groups of L-shaped rotating blocks, through holes are opened on opposite sides of the two groups of limit plates, the external threads of the two groups of L-shaped rotating blocks are respectively connected to the threaded holes of the two groups of limit plates, and rotating rods are installed on the adjacent ends of the two groups of L-shaped rotating blocks.

[0011] Furthermore, rubber pads are bonded to the inner side walls of the two groups of rotating rods, and adjacent sides of the two groups of rubber pads are respectively in contact with the left and right sides of the high-definition recording and broadcasting integrated machine body.

[0012] Furthermore, a U-shaped positioning plate is installed on one adjacent side of the two groups of rotating rods, and the positions of the back inner walls of the two groups of U-shaped positioning plates are respectively parallel to the positions of the back inner walls of the adjacent group of rotating rods.

[0013] Furthermore, two groups of baffles are installed on the lower surface of the top plate, and the positions of the two groups of baffles are respectively set on the front and rear sides of the bevel gear one and the bevel gear two. The material of the two groups of baffles is transparent acrylic plate, and the left and right sides of the two groups of baffles are respectively abutted against the left and right inner walls of the U-shaped protective cover.

[0014] The beneficial effects of the utility model are as follows:

[0015] 1. The utility model starts a motor to drive the bevel gear 1 and the bevel gear 2 to trigger the bidirectional threaded rod to rotate, so that the bidirectional threaded rod drives the two sets of sliders to slide in the slots of the top plate during the rotation, and then the two sets of limit plates are installed on the upper surfaces of the two sets of sliders, so that the two sets of limit plates are subsequently connected to the left and right sides of the high-definition recording and broadcasting all-in-one machine body during the movement, and then the positioning mechanism limits the moving position of the high-definition recording and broadcasting all-in-one machine body during use, thereby avoiding the subsequent high-definition recording and broadcasting all-in-one machine body from moving when it is placed on the upper end of the top plate for recording; the internal driving component of the positioning mechanism is arranged between the U-shaped protective cover and the top plate, so that the U-shaped protective cover and the top plate shield and protect the driving component of the positioning mechanism, thereby avoiding the internal driving component of the positioning mechanism from being damaged by collision during use.

[0016] 2. The utility model adjusts the position of the mobile high-definition video recorder and broadcasting integrated machine body to move the position of the high-definition video recorder and broadcasting integrated machine body between the inner side walls of the two groups of rotating rods, so that when the two groups of limiting plates clamp the high-definition video recorder and broadcasting integrated machine body, the inner side walls of the two groups of rotating rods are respectively abutted against the left and right sides of the high-definition video recorder and broadcasting integrated machine body, and then the two groups of L-shaped rotating blocks are rotated to drive the two groups of rotating rods and the high-definition video recorder and broadcasting integrated machine body to rotate, so that when the high-definition video recorder and broadcasting integrated machine body is clamped between the two groups of limiting plates, the angle can be adjusted without disassembly and movement, thereby reducing the time and labor consumed by subsequent staff in adjusting the angle of the mobile high-definition video recorder and broadcasting integrated machine body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front structural schematic diagram of the utility model;

[0018] Figure 2 It is a side structural schematic diagram of the utility model;

[0019] Figure 3 This utility model Figure 1 Enlarged view of point A in the middle.

[0020] Figure numerals: 1. base; 2. support column; 3. U-shaped protective cover; 4. top plate; 5. positioning mechanism; 501. motor; 502. bevel gear one; 503. bevel gear two; 504. slider; 505. bidirectional threaded rod; 506. limit plate; 6. HD recording and broadcasting all-in-one machine body; 7. baffle; 8. rubber pad; 9. U-shaped positioning plate; 10. adjustment mechanism; 1001. rotating rod; 1002. L-shaped rotating block. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. 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] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0024] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] like Figures 1 to 3As shown, the high-definition video recorder and broadcaster comprises a base 1, a top plate 4 and a high-definition video recorder and broadcaster body 6. A support column 2 is installed on the upper surface of the base 1, a U-shaped protective cover 3 is arranged on the upper surface of the support column 2, and the top plate 4 is installed on the upper surface of the U-shaped protective cover 3. Through holes are provided on the inner walls of the left and right sides of the U-shaped protective cover 3. Positioning mechanisms 5 for limiting the moving range of the high-definition video recorder and broadcaster body 6 are installed inside the two groups of through holes of the U-shaped protective cover 3. Adjustment mechanisms 10 for driving the high-definition video recorder and broadcaster body 6 to rotate are arranged on the left and right sides of the positioning mechanism 5. Specifically, by starting the positioning mechanism, The mechanism 5 limits the moving position of the high-definition video recorder and broadcaster body 6 on the upper end of the top plate 4 during use, thereby minimizing the movement of the high-definition video recorder and broadcaster body 6 when it is placed on the upper end of the top plate 4 for recording; the internal drive component of the positioning mechanism 5 is arranged between the U-shaped protective cover 3 and the top plate 4, so that the U-shaped protective cover 3 and the top plate 4 shield and protect the drive component of the positioning mechanism 5, thereby minimizing the internal drive component of the positioning mechanism 5 from being damaged by collision during use, thereby improving the service life of the positioning mechanism 5.

[0026] like Figures 1 to 3 As shown, the positioning mechanism 5 includes a motor 501 and a bidirectional threaded rod 505, the motor 501 is installed at the bottom of the inner wall of the U-shaped protective cover 3, the bidirectional threaded rod 505 is rotatably connected to the two groups of through holes of the U-shaped protective cover 3, the outer surface of the bidirectional threaded rod 505 is fixedly installed with a bevel gear 2 503, the outer teeth of the bevel gear 2 503 are meshed and connected with a bevel gear 1 502, the lower surface of the bevel gear 1 502 is installed on the output shaft of the motor 501, the outer threads of the bidirectional threaded rod 505 are connected with two groups of sliders 504, the upper surface of the top plate 4 is provided with a slot, the top ends of the two groups of sliders 504 are slidably connected to the inside of the slot of the top plate 4, the upper surfaces of the two groups of sliders 504 are installed with limit plates 506, and the left and right sides of the high-definition recording and broadcasting integrated machine body 6 are attached to the adjacent side of the two groups of limit plates 506;

[0027] Specifically, when the high-definition video recorder and broadcaster body 6 is placed on the upper end of the top plate 4, the starting motor 501 drives the bevel gear 1 502 and the bevel gear 2 503 to trigger the bidirectional threaded rod 505 to rotate, so that the bidirectional threaded rod 505 drives the two sets of sliders 504 to slide inside the slot of the top plate 4 during the rotation, and then the two sets of limit plates 506 are installed on the upper surface of the two sets of sliders 504, so that the subsequent two sets of limit plates 506 are clamped on the left and right sides of the high-definition video recorder and broadcaster body 6 during the movement, so that the positioning mechanism 5 limits the moving position of the high-definition video recorder and broadcaster body 6 during use, so as to avoid the high-definition video recorder and broadcaster body 6 from moving during the subsequent recording process when it is placed on the upper end of the top plate 4; the internal drive component of the positioning mechanism 5 is arranged between the U-shaped protective cover 3 and the top plate 4, so that the U-shaped protective cover 3 and the top plate 4 shield and protect the drive component of the positioning mechanism 5, so as to avoid the internal drive component of the positioning mechanism 5 from being damaged by collision during use, thereby improving the service life of the positioning mechanism 5.

[0028] like Figure 2 and Figure 3 As shown, the adjustment mechanism 10 includes two groups of L-shaped rotating blocks 1002, and through holes are opened on opposite sides of the two groups of limiting plates 506. The two groups of L-shaped rotating blocks 1002 are respectively connected to the through holes of the two groups of limiting plates 506 by rotation damping, and the adjacent ends of the two groups of L-shaped rotating blocks 1002 are installed with rotating rods 1001; specifically, when the user installs the high-definition recording and broadcasting integrated machine body 6 between the two groups of limiting plates 506, the position of the high-definition recording and broadcasting integrated machine body 6 is moved to the position of the two groups of rotating rods 1001 by adjusting the position of the high-definition recording and broadcasting integrated machine body 6. The side walls make it possible for the inner walls of the two sets of rotating rods 1001 to respectively abut against the left and right sides of the high-definition video recorder and broadcaster body 6 when the two sets of limiting plates 506 subsequently clamp the high-definition video recorder and broadcaster body 6, and then the two sets of L-shaped rotating blocks 1002 are rotated to drive the two sets of rotating rods 1001 and the high-definition video recorder and broadcaster body 6 to rotate, so that when the high-definition video recorder and broadcaster body 6 is clamped between the two sets of limiting plates 506, the angle can be adjusted without disassembly and movement, thereby reducing the time and labor spent by subsequent staff in adjusting the angle of the high-definition video recorder and broadcaster body 6.

[0029] like Figures 1 to 3As shown, the inner walls of the two groups of rotating rods 1001 are bonded with rubber pads 8, and the adjacent sides of the two groups of rubber pads 8 are respectively abutted against the left and right sides of the high-definition recording and broadcasting integrated machine body 6; specifically, when the left and right sides of the high-definition recording and broadcasting integrated machine body 6 are respectively abutted against the inner walls of the two groups of rotating rods 1001, the two groups of rubber pads 8 are bonded to the inner walls of the two groups of rotating rods 1001, so that the adjacent sides of the two groups of rubber pads 8 are respectively abutted against the left and right sides of the high-definition recording and broadcasting integrated machine body 6, and then the two groups of rubber pads 8 shield and protect the left and right sides of the high-definition recording and broadcasting integrated machine body 6 and the contact surface of the adjustment mechanism 10, so as to avoid the collision between the outer surfaces of the left and right sides of the high-definition recording and broadcasting integrated machine body 6 and the adjustment mechanism 10 after the high-definition recording and broadcasting integrated machine body 6 is subsequently installed inside the adjustment mechanism 10.

[0030] like Figures 1 to 3 As shown, a U-shaped positioning plate 9 is installed on one adjacent side of the two groups of rotating rods 1001, and the positions of the inner walls on the back of the two groups of U-shaped positioning plates 9 are respectively parallel to the positions of the inner walls on the back of the adjacent group of rotating rods 1001; specifically, when the staff installs the high-definition recording and broadcasting integrated machine body 6 inside the adjusting mechanism 10, the bottom end of the high-definition recording and broadcasting integrated machine body 6 is clamped in the groove of the U-shaped positioning plate 9 by moving the high-definition recording and broadcasting integrated machine body 6, so that the U-shaped positioning plate 9 supports the position of the high-definition recording and broadcasting integrated machine body 6 during the process of installing the high-definition recording and broadcasting integrated machine body 6 inside the adjusting mechanism 10, so that the subsequent staff does not need to manually support the high-definition recording and broadcasting integrated machine body 6 during the process of rotating the adjusting mechanism 10 to install and position the high-definition recording and broadcasting integrated machine body 6, thereby reducing the labor consumed by the subsequent staff when installing the high-definition recording and broadcasting integrated machine body 6 inside the adjusting mechanism 10.

[0031] like Figure 1 and Figure 2As shown, two groups of baffles 7 are installed on the lower surface of the top plate 4, and the positions of the two groups of baffles 7 are respectively set on the front and rear sides of the bevel gear 1 502 and the bevel gear 2 503. The material of the two groups of baffles 7 is a transparent acrylic plate, and the left and right sides of the two groups of baffles 7 are respectively abutted against the left and right inner walls of the U-shaped protective cover 3; specifically, the positions of the two groups of baffles 7 are respectively set on the front and rear sides of the bevel gear 1 502 and the bevel gear 2 503, so that the two groups of baffles 7 can block the bevel gear 1 502 and the bevel gear 2 503 at the lower end of the top plate 4, thereby minimizing the risk of subsequent users. During the process of using the device, contact is made with bevel gear 1 502 and bevel gear 2 503, thereby improving the safety of the device during use; because the material of the two sets of baffles 7 is transparent, the staff can view the use status of bevel gear 1 502 and bevel gear 2 503 through baffles 7, so that subsequent users can quickly observe whether there are impurities inside the teeth of bevel gear 1 502 and bevel gear 2 503, thereby facilitating subsequent users to clean the dust inside the teeth of bevel gear 1 502 and bevel gear 2 503 in time.

[0032] In summary: by starting the motor 501 to drive the bevel gear 1 502 and the bevel gear 2 503 to trigger the bidirectional threaded rod 505 to rotate, the bidirectional threaded rod 505 drives the two sets of sliders 504 to slide in the slots of the top plate 4 during the rotation, and then the two sets of limit plates 506 are installed on the upper surfaces of the two sets of sliders 504, so that the subsequent two sets of limit plates 506 are connected to the left and right sides of the high-definition recording and broadcasting integrated machine body 6 during the movement, so that the positioning mechanism 5 limits the moving position of the high-definition recording and broadcasting integrated machine body 6 during use, thereby avoiding the subsequent high-definition recording and broadcasting integrated machine body 6 from moving when it is placed on the upper end of the top plate 4 for recording; by adjusting the displacement The position of the high-definition video recorder and broadcaster body 6 is moved to between the inner side walls of the two groups of rotating rods 1001, so that when the two groups of limiting plates 506 clamp the high-definition video recorder and broadcaster body 6, the inner side walls of the two groups of rotating rods 1001 are respectively abutted against the left and right sides of the high-definition video recorder and broadcaster body 6, and then the two groups of L-shaped rotating blocks 1002 are rotated to drive the two groups of rotating rods 1001 and the high-definition video recorder and broadcaster body 6 to rotate, so that when the high-definition video recorder and broadcaster body 6 is clamped between the two groups of limiting plates 506, the angle can be adjusted without disassembly and movement, thereby reducing the time and labor spent by subsequent staff in adjusting the angle of the mobile high-definition video recorder and broadcaster body 6.

[0033] At the same time, by moving the high-definition video recorder and broadcaster body 6, the bottom end of the high-definition video recorder and broadcaster body 6 is clamped in the groove of the U-shaped positioning plate 9, so that the U-shaped positioning plate 9 supports the position of the high-definition video recorder and broadcaster body 6 during the installation process of the high-definition video recorder and broadcaster body 6 inside the adjustment mechanism 10, so that subsequent staff members do not need to manually support the high-definition video recorder and broadcaster body 6 during the process of rotating the adjustment mechanism 10 to install and position the high-definition video recorder and broadcaster body 6, thereby reducing the labor consumed by subsequent staff members when installing the high-definition video recorder and broadcaster body 6 inside the adjustment mechanism 10.

[0034] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the utility model. The utility model may be subject to various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A high-definition video recorder and broadcaster, comprising a base (1), a top plate (4) and a high-definition video recorder and broadcaster body (6), characterized in that: A support column (2) is installed on the upper surface of the base (1), a U-shaped protective cover (3) is arranged on the upper surface of the support column (2), the top plate (4) is installed on the upper surface of the U-shaped protective cover (3), through holes are provided on the left and right inner walls of the U-shaped protective cover (3), positioning mechanisms (5) for limiting the movement range of the high-definition video recorder and broadcaster body (6) are installed inside the two groups of through holes of the U-shaped protective cover (3), and adjustment mechanisms (10) for driving the high-definition video recorder and broadcaster body (6) to rotate are arranged on the left and right sides of the positioning mechanism (5).

2. The high-definition recording and broadcasting integrated machine according to claim 1, characterized in that: The positioning mechanism (5) comprises a motor (501) and a bidirectional threaded rod (505), wherein the motor (501) is mounted on the bottom of the inner wall of the U-shaped protective cover (3), the bidirectional threaded rod (505) is rotatably connected to the inside of two groups of through holes of the U-shaped protective cover (3), a bevel gear 2 (503) is fixedly mounted on the outer surface of the bidirectional threaded rod (505), the outer teeth of the bevel gear 2 (503) are meshedly connected to the bevel gear 1 (502), and the bevel gear 1 (502) is ) is installed on the output shaft of the motor (501), the external thread of the bidirectional threaded rod (505) is connected with two groups of sliders (504), the upper surface of the top plate (4) is provided with a slot, the top ends of the two groups of sliders (504) are slidably connected to the inside of the slot of the top plate (4), and the upper surfaces of the two groups of sliders (504) are installed with limit plates (506), and the left and right sides of the high-definition recording and broadcasting integrated machine body (6) are attached to the adjacent side of the two groups of limit plates (506).

3. The high-definition recording and broadcasting integrated machine according to claim 2, characterized in that: The adjustment mechanism (10) comprises two groups of L-shaped rotating blocks (1002), through holes are provided on opposite sides of the two groups of limiting plates (506), the external threads of the two groups of L-shaped rotating blocks (1002) are respectively connected to the inside of the threaded holes of the two groups of limiting plates (506), and rotating rods (1001) are installed on adjacent ends of the two groups of L-shaped rotating blocks (1002).

4. The high-definition recording and broadcasting integrated machine according to claim 3, characterized in that: The inner side walls of the two groups of rotating rods (1001) are both bonded with rubber pads (8), and adjacent sides of the two groups of rubber pads (8) are respectively in contact with the left and right sides of the high-definition recording and broadcasting integrated machine body (6).

5. The high-definition recording and broadcasting integrated machine according to claim 3, characterized in that: A U-shaped positioning plate (9) is installed on one adjacent side of the two groups of rotating rods (1001), and the positions of the back inner walls of the two groups of U-shaped positioning plates (9) are respectively parallel to the positions of the back inner walls of the adjacent groups of rotating rods (1001).

6. The high-definition recording and broadcasting integrated machine according to claim 2, characterized in that: Two groups of baffles (7) are installed on the lower surface of the top plate (4), and the positions of the two groups of baffles (7) are respectively arranged on the front and rear sides of the bevel gear 1 (502) and the bevel gear 2 (503). The material of the two groups of baffles (7) is a transparent acrylic plate, and the left and right sides of the two groups of baffles (7) are respectively abutted against the left and right inner walls of the U-shaped protective cover (3).

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