Shooting device support

Abstract

The utility model discloses a shooting equipment support, including first support rod, second support rod and rotating part, one end of first support rod is used for installing shooting equipment, first support rod can be slidably connected on rotating part relative rotating part, and can be locked on rotating part through first locking part, rotating part can be rotatably connected on one end of second support rod, and can be locked on second support rod through second locking part, when unscrewing first locking part, first support rod can slide relative rotating part, to make one end of first support rod close or away from rotating part, when unscrewing second locking part, rotating part can rotate relative second support rod, to make one end of first support rod close or away from second support rod, by this, it can adjust the front -back distance of shooting equipment when the dive and the height when the positive shot according to the demand, reached the purpose of different use height and distance.

Description

Technical Field

[0001] This utility model relates to the field of electronic device brackets, and in particular to a camera bracket. Background Technology

[0002] In daily life, people often use video equipment to photograph and record people, scenery, paper documents or materials for preservation or to send to others. Depending on the needs, the required shooting angle for the subject is also different. For example, when photographing paper documents, it is necessary to present a flat effect so that the text content can be clearly seen. In this case, it is necessary to shoot the paper document from above. If the subject is photographed by hand, it will affect the shooting effect due to the lack of stability. When shooting in large batches, it also increases the labor intensity.

[0003] Currently, the above problems can be solved by using overhead shooting brackets to fix the camera equipment. However, current overhead shooting brackets cannot easily adjust the front and rear distance when shooting from above, and their adjustability is poor, which cannot meet various shooting needs.

[0004] Therefore, a new technology needs to be developed to solve the above problems. Utility Model Content

[0005] In view of this, the present invention addresses the deficiencies of the existing technology, and its main purpose is to provide a shooting equipment bracket that can adjust the front and rear distance of the shooting equipment when shooting from above, so as to achieve different usage heights and distances.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A shooting equipment bracket includes a first support rod, a second support rod, and a rotating component. One end of the first support rod is used to mount the shooting equipment. The first support rod is slidably connected to the rotating component relative to it and can be locked to the rotating component by a first locking component. The rotating component is rotatably connected to one end of the second support rod and can be locked to the second support rod by a second locking component.

[0008] When the first locking member is loosened, the first support rod can slide relative to the rotating member, so that one end of the first support rod approaches or moves away from the rotating member;

[0009] When the second locking member is loosened, the rotating member can rotate relative to the second support rod, so that one end of the first support rod approaches or moves away from the second support rod.

[0010] As a preferred embodiment, the rotating member is provided with a sliding connection portion, and the first support rod can be slidably connected to the sliding connection portion relative to the sliding connection portion through the first locking member. The sliding connection portion is provided with a through groove extending along the length direction of the sliding connection portion, and the first support rod can be movably inserted into the through groove. The first locking member can be rotatably sleeved on one end of the sliding connection portion.

[0011] As a preferred embodiment, one end of the sliding connection is provided with a clamping part extending outward along the length direction of the sliding connection. An external thread is provided on the outer side wall of the sliding connection near the clamping part. The first locking member is provided with a locking hole extending along the length direction of the first locking member. An internal thread and a locking action part are sequentially provided in the locking hole along the axial direction of the locking hole. The internal thread is threadedly connected to the external thread, and the locking action part abuts against the clamping part. When the first locking member is tightened, the locking action part can cause the clamping part to clamp or loosen the first support rod.

[0012] As a preferred embodiment, the inner wall diameter of the locking part gradually decreases from the end near the internal thread toward the end away from the internal thread, and the outer wall diameter of the clamping part gradually decreases from the end near the external thread toward the end away from the external thread.

[0013] As a preferred embodiment, the inner sidewall of the through groove is provided with a guide protrusion extending along the length direction of the sliding connection, and the outer sidewall of the first support rod is provided with a guide groove extending along the length direction of the first support rod, and the guide protrusion is adapted to the guide groove.

[0014] As a preferred embodiment, the second locking component includes a knob, a first rotating body, and a locking bolt. One end of the first rotating body is connected to one end of the second support rod. A second rotating body is provided on the rotating component. The other end of the first rotating body and the second rotating body are rotatably connected. One end of the locking bolt passes through the first rotating body and the second rotating body and is threadedly connected to the knob. Rotating the knob can cause the first rotating body to press or release the second rotating body.

[0015] As a preferred embodiment, the second locking member further includes two washers. The first rotating body is provided with a relief groove, and the second rotating body is rotatably positioned within the relief groove. Both washers are disposed within the relief groove and are located on opposite sides of the second rotating body. The two washers are respectively sandwiched between the first rotating body and the second rotating body.

[0016] As a preferred embodiment, one end of the first support rod is rotatably connected to a universal ball joint, and the other end of the second support rod is connected to a base for support.

[0017] As a preferred embodiment, the other end of the second support rod is connected to a clamping seat for clamping. The clamping seat is provided with a clamping space. The lower end of the clamping seat is rotatably connected to an adjusting member for adjusting the size of the clamping space. The upper end of the adjusting member extends into the clamping seat and is connected to a clamping plate. The clamping space is formed between the inner upper sidewall of the clamping seat and the upper sidewall of the clamping plate.

[0018] As a preferred embodiment, the upper end of the clamping seat is connected to a fixed seat, and the other end of the second support rod is fixedly connected to a rotating seat. The rotating seat is rotatably connected to the fixed seat, and a fastening screw is threaded onto the fixed seat. The second support rod and the rotating seat extend into the fixed seat, and one end of the fastening screw can pass through the side wall of the fixed seat and extend into the fixed seat to press or loosen the second support rod.

[0019] This invention has significant advantages and beneficial effects compared with the prior art. Specifically, as can be seen from the above technical solution, it mainly involves slidably connecting a first support rod to a rotating member relative to the rotating member, and locking the first support rod to the rotating member using a first locking member. The rotating member is rotatably connected to one end of a second support rod, and the rotating member is locked to the second support rod using a second locking member. When the first locking member is loosened, the first support rod can slide relative to the rotating member, allowing one end of the first support rod to move closer to or away from the rotating member. When the second locking member is loosened, the rotating member can rotate relative to the second support rod, allowing one end of the first support rod to move closer to or away from the second support rod. Thus, when shooting from above, by loosening the second locking member, the first support rod is rotated to be perpendicular to the second support rod and then fixed. By loosening the first locking member, the first support rod can be moved back and forth to adjust the distance between the shooting device fixed on the first support rod. When shooting from the front, by loosening the second locking member, the first support rod is rotated to be parallel to the second support rod and then fixed. By loosening the first locking member, the first support rod can be moved up and down to adjust the height of the shooting device fixed on the first support rod. This allows the distance between the shooting device when shooting from above and the height when shooting from the front to be adjusted according to needs, achieving different usage heights and distances.

[0020] To more clearly illustrate the structural features, technical means, and specific objectives and functions of this utility model, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0021] Figure 1This is a schematic diagram of the overall structure of the shooting equipment bracket provided in Embodiment 1 of this utility model (in its stowed state);

[0022] Figure 2 This is another overall structural schematic diagram (90-degree state 1) of the shooting equipment bracket provided in Embodiment 1 of this utility model;

[0023] Figure 3 This is a schematic diagram of another overall structure of the shooting equipment bracket provided in Embodiment 1 of this utility model (180-degree extended state);

[0024] Figure 4 This is another overall structural diagram of the shooting equipment bracket provided in Embodiment 1 of this utility model (90-degree state 2);

[0025] Figure 5 This is an exploded view (folded state) of the shooting equipment bracket provided in Embodiment 1 of this utility model;

[0026] Figure 6 This is another exploded view (in its stowed state) of the shooting equipment bracket provided in Embodiment 1 of this utility model;

[0027] Figure 7 This is a partial cross-sectional schematic diagram of the shooting equipment bracket provided in Embodiment 1 of this utility model;

[0028] Figure 8 This is a partial cross-sectional schematic diagram of the shooting equipment bracket provided in Embodiment 1 of this utility model;

[0029] Figure 9 This is another partial structural cross-sectional schematic diagram of the shooting equipment bracket provided in Embodiment 1 of this utility model;

[0030] Figure 10 This is a schematic diagram of the overall structure of the shooting equipment bracket provided in Embodiment 2 of this utility model (in its stowed state);

[0031] Figure 11 This is another overall structural diagram (in the stowed state) of the shooting equipment bracket provided in Embodiment 2 of this utility model;

[0032] Figure 12 This is a partial cross-sectional schematic diagram of the shooting equipment bracket provided in Embodiment 2 of this utility model.

[0033] Explanation of reference numerals in the attached diagram:

[0034] 10. First support rod; 11. Guide groove

[0035] 20. Second support rod; 30. Rotating component

[0036] 31. Sliding connection part 311. Through groove

[0037] 312. Clamping part; 313. External thread

[0038] 314. Guide protrusion; 32. Second rotating body

[0039] 40. First locking element; 41. Internal thread

[0040] 42. Locking mechanism 43. Anti-slip texture

[0041] 50. Second locking element; 51. Knob

[0042] 52. First rotating body; 521. Relief groove

[0043] 53. Locking bolt 54. First pressure cap

[0044] 55. Second pressure cap 56. Washer

[0045] 60. Universal ball joint; 70. Base

[0046] 80. Rotary seat; 90. Rotating shaft

[0047] 101. Clamping seat; 102. Clamping space

[0048] 103. Adjusting component; 104. Clamping plate

[0049] 105. Pad; 106. Rotating seat

[0050] 107. Connecting shaft; 108. Fixing base

[0051] 109. Tighten the screws. Detailed Implementation

[0052] In the description of this utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "inner", and "outer" appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0053] Please refer to Figures 1 to 12 As shown, it illustrates the specific structure of the shooting device bracket provided in two embodiments of this utility model, wherein, Figures 1 to 9 The specific structure of Embodiment 1 is shown. Figures 10 to 12 The specific structure of Embodiment 2 is shown.

[0054] like Figures 1 to 9 As shown in Embodiment 1, the shooting device bracket includes a first support rod 10, a second support rod 20, and a rotating member 30. One end of the first support rod 10 is used to mount the shooting device. The first support rod 10 is slidably connected to the rotating member 30 relative to it and can be locked to the rotating member 30 by a first locking member 40. The rotating member 30 is rotatably connected to one end of the second support rod 20 and can be locked to the second support rod 20 by a second locking member 50. When the first locking member 40 is loosened, the first support rod 10 can slide relative to the rotating member 30, so that one end of the first support rod 10 approaches or moves away from the rotating member 30. When the second locking member 50 is loosened, the rotating member 30 can rotate relative to the second support rod 20, so that one end of the first support rod 10 approaches or moves away from the rotating member 30. By moving away from the second support rod 20, when shooting from above, the first support rod 10 can be rotated to be perpendicular to the second support rod 20 and then fixed by loosening the second locking member 50. After loosening the first locking member 40, the first support rod 10 can be moved back and forth to adjust the front-to-back distance of the shooting device fixed on the first support rod 10. When shooting from the front, the first support rod 10 can be rotated to be parallel to the second support rod 20 and then fixed by loosening the second locking member 50. After loosening the first locking member 40, the first support rod 10 can be moved up and down to adjust the height of the shooting device fixed on the first support rod 10. This allows the front-to-back distance of the shooting device to be adjusted according to needs when shooting from above and the height when shooting from the front, achieving different usage heights and distances.

[0055] like Figures 5 to 7 As shown in Embodiment 1, the rotating member 30 is provided with a sliding connection part 31. The first support rod 10 can be slidably connected to the sliding connection part 31 via the first locking member 40. The sliding connection part 31 is provided with a through groove 311 extending along the length direction of the sliding connection part 31. The first support rod 10 can be movably inserted into the through groove 311. The first locking member 40 can be rotatably sleeved on one end of the sliding connection part 31.

[0056] like Figures 5 to 7As shown in Embodiment 1, specifically, one end of the sliding connection 31 is provided with a clamping part 312 extending outward along the length direction of the sliding connection 31. An external thread 313 is provided on the outer side wall of the end of the sliding connection 31 near the clamping part 312. The first locking member 40 is provided with a locking hole extending along the length direction of the first locking member 40. An internal thread 41 and a locking action part 42 are sequentially provided in the locking hole along the axial direction of the locking hole. The internal thread 41 is threadedly connected to the external thread 313, and the locking action part 42 abuts against the clamping part 312. When the first locking member 40 is tightened, the locking action part 42 can cause the clamping part 312 to clamp or loosen the first support rod 10. Specifically, the clamping part 312 has an arc-shaped structure, and the outer wall diameter of the clamping part 312 gradually decreases from the end near the external thread 313 to the end away from the external thread 313; the locking part 42 has an annular structure, and the inner wall diameter of the locking part 42 gradually decreases from the end near the internal thread 41 to the end away from the internal thread 41; the first locking member 40 has an overall annular structure, and the outer peripheral sidewall of the first locking member 40 is provided with anti-slip texture 43 to facilitate rotation.

[0057] like Figures 5 to 7 As shown in Embodiment 1, the inner sidewall of the through groove 311 is provided with guide protrusions 314 extending along the length of the sliding connection 31 on both sides. The outer sidewall of the first support rod 10 is provided with guide grooves 11 extending along the length of the first support rod 10 on both sides. The guide protrusions 314 are adapted to the corresponding guide grooves 11, so that the first support rod 10 can move along the axis of the sliding connection 31 and restrict the first support rod 10 from rotating around the axis of the sliding connection 31. Specifically, there are two clamping parts 312, which are symmetrically arranged on both sides of the opening at one end of the through groove 311. The guide protrusions 314 extend to the sidewall of the corresponding clamping part 312 facing the first support rod 10.

[0058] like Figure 5 , Figure 6 , Figure 8As shown in Embodiment 1, the second locking member 50 includes a knob 51, a first rotating body 52, and a locking bolt 53. One end of the first rotating body 52 is connected to one end of the second support rod 20. The rotating member 30 is provided with a second rotating body 32, one end of which is integrally connected to the outer peripheral sidewall of the sliding connection part 31. The other end of the first rotating body 52 and the second rotating body 32 are rotatably connected. One end of the locking bolt 53 passes through the first rotating body 52 and the second rotating body 32 and is threadedly connected to the knob 51. Rotating the knob 51 can cause the first rotating body 52 to press or release the second rotating body 32, so that the first rotating body 52 and the second rotating body 32 can rotate relative to each other or be fixed. Here, the second locking member 50 is used to adjust the locking force of the rotating member 30 relative to the second support rod 20 by tightening the rotating member 30.

[0059] like Figure 5 , Figure 6 , Figure 8 As shown in Embodiment 1, the second locking member 50 further includes a first pressure cover 54, a second pressure cover 55, and two washers 56. The first pressure cover 54 covers one side of the first rotating body 52, and the second pressure cover 55 covers one side of the second rotating body 32. The first rotating body 52 is provided with a relief groove 521, and the second rotating body 32 is rotatably positioned in the relief groove 521. The two washers 56 are both provided in the relief groove 521 and are located on both sides of the second rotating body 32. The two washers 56 are respectively sandwiched between the first rotating body 52 and the second rotating body 32, and the two washers 56 provide frictional resistance for the relative rotation between the rotating member 30 and the second support rod 20.

[0060] One end of the first support rod 10 is rotatably connected to a universal ball joint 60, so that the shooting equipment and other shooting devices can be rotatably mounted on one end of the first support rod 10 through the universal ball joint 60, so that the angle of the shooting equipment and other shooting devices can be adjusted to meet the user's usage needs.

[0061] like Figures 1 to 9As shown in Embodiment 1, the other end of the second support rod 20 is connected to a base 70 for support, so that it can be used on a tabletop supported by the base 70; the other end of the second support rod 20 is fixedly connected to a rotating seat 80, which is rotatably connected to the upper end of the base 70 via a rotating shaft 90, and the rotation axis of the rotating seat 80 is parallel to the extension direction of the second support rod 20. Specifically, the rotating shaft 90 is a connecting screw that connects the rotating seat 80 and the base 70. A damping washer can be installed between the rotating seat 80 and the base 70. When the second support rod 20 rotates, it can drive the rotating seat 80 and the rotating shaft 90 to rotate together relative to the base 70. The damping washer provides frictional resistance when there is no relative rotation between the rotating seat 80 and the base 70. In this way, the other end of the second support rod 20 can be rotatably connected to the base 70, and the two support rods can be rotated horizontally relative to the base 70 to achieve different usage angles of the bracket. At the same time, the second support rod 20 can be a telescopic rod, so that by adjusting the vertical length of the second support rod 20 and adjusting the lateral distance of the first support rod 10, the height of the shooting equipment and the relative distance between the shooting equipment and the second support rod 20 can be adjusted, thereby achieving different usage heights and distances.

[0062] like Figures 10 to 12 As shown, the specific structure of Embodiment 2 is illustrated. Its basic structure is the same as that of Embodiment 1, except that in Embodiment 2, the other end of the second support rod 20 is connected to a clamping seat 101 for clamping, so that it can be clamped on a tabletop. Specifically, the clamping seat 101 is provided with a clamping space 102. The lower end of the clamping seat 101 is rotatably connected to an adjusting member 103 for adjusting the size of the clamping space 102. The upper end of the adjusting member 103 extends into the clamping seat 101 and is connected to a clamping plate 104. The clamping space 102 is formed between the inner upper sidewall of the clamping seat 101 and the upper sidewall of the clamping plate 104. As the adjusting member 103 rotates relative to the clamping seat 101, the clamping plate 104 can move closer to or further away from the inner upper sidewall of the clamping seat 101 to adjust the size of the clamping space 102. The adjusting member 103 is an adjusting screw, and a pad 105 is provided on the inner upper sidewall of the clamping seat 101.

[0063] like Figures 10 to 12As shown in Embodiment 2, the other end of the second support rod 20 is fixedly connected to a rotating seat 106. The rotating seat 106 is rotatably connected to a fixed seat 108 via a connecting shaft 107. The fixed seat 108 is fastened to the upper end of the clamping seat 101 by screws. The rotation axis of the rotating seat 106 is parallel to the extension direction of the second support rod 20. The connecting shaft 107 is a connecting screw that connects the rotating seat 106 and the fixed seat 108 together. When the second support rod 20 rotates, it can drive the rotating seat 106 and the rotating shaft 90 to rotate relative to the fixed seat 108. In this way, the other end of the second support rod 20 can be rotatably connected to the clamping seat 101, and the two support rods can be rotated horizontally relative to the clamping seat 101 to achieve different usage angles of the bracket as a whole.

[0064] like Figures 10 to 12 As shown, in Embodiment 2, a fastening screw 109 is threaded onto the fixed base 108. The other end of the second support rod 20 and the rotating base 106 extend into the fixed base 108. One end of the fastening screw 109 passes through the side wall of the fixed base 108 and extends into the fixed base 108. By rotating the fastening screw 109, one end of the fastening screw 109 presses against or loosens the other end of the second support rod 20, so as to fasten the second support rod 20 onto the fixed base 108 so that the second support rod 20 cannot rotate, or to loosen the second support rod 20 so that the second support rod 20 can rotate.

[0065] In summary, the key design feature of this utility model lies in its ability to slidably connect a first support rod to a rotating member, and to lock the first support rod to the rotating member using a first locking member. The rotating member is rotatably connected to one end of a second support rod, and the rotating member is locked to the second support rod using a second locking member. When the first locking member is loosened, the first support rod can slide relative to the rotating member, allowing one end of the first support rod to move closer to or away from the rotating member. When the second locking member is loosened, the rotating member can rotate relative to the second support rod, allowing one end of the first support rod to move closer to or away from the second support rod. Thus, when shooting from above, the first support rod can be slidably connected to the rotating member, and the first support rod can be locked to the rotating member using a second locking member. Loosen the second locking member, rotate the first support rod until it is perpendicular to the second support rod, and then fix it. After loosening the first locking member, adjust the first support rod to move it back and forth to adjust the front and back distance of the shooting device fixed on the first support rod. When shooting from the front, loosen the second locking member, rotate the first support rod until it is parallel to the second support rod, and then fix it. After loosening the first locking member, adjust the first support rod to move it up and down to adjust the height of the shooting device fixed on the first support rod. This allows the front and back distance of the shooting device to be adjusted according to the needs of shooting from above and shooting from the front, achieving different usage heights and distances.

[0066] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A shooting equipment bracket, characterized in that: The device includes a first support rod, a second support rod, and a rotating component. One end of the first support rod is used to mount a shooting device. The first support rod is slidably connected to the rotating component relative to it and can be locked to the rotating component by a first locking component. The rotating component is rotatably connected to one end of the second support rod and can be locked to the second support rod by a second locking component. When the first locking member is loosened, the first support rod can slide relative to the rotating member, so that one end of the first support rod approaches or moves away from the rotating member; When the second locking member is loosened, the rotating member can rotate relative to the second support rod, so that one end of the first support rod approaches or moves away from the second support rod.

2. The shooting equipment bracket according to claim 1, characterized in that: The rotating component is provided with a sliding connection portion, and the first support rod can be slidably connected to the sliding connection portion relative to the sliding connection portion through the first locking component; the sliding connection portion is provided with a through groove extending along the length direction of the sliding connection portion, the first support rod can be movably inserted into the through groove, and the first locking component can be rotatably sleeved on one end of the sliding connection portion.

3. The shooting equipment bracket according to claim 2, characterized in that: One end of the sliding connection is provided with a clamping part extending outward along the length direction of the sliding connection. An external thread is provided on the outer side wall of the sliding connection near the clamping part. The first locking member is provided with a locking hole extending along the length direction of the first locking member. An internal thread and a locking action part are sequentially provided in the locking hole along the axial direction of the locking hole. The internal thread is threadedly connected to the external thread. The locking action part abuts against the clamping part. When the first locking member is tightened, the locking action part can cause the clamping part to clamp or loosen the first support rod.

4. The shooting equipment bracket according to claim 3, characterized in that: The inner diameter of the locking part gradually decreases from the end closer to the internal thread toward the end farther from the internal thread, and the outer diameter of the clamping part gradually decreases from the end closer to the external thread toward the end farther from the external thread.

5. The shooting equipment bracket according to claim 2, characterized in that: The inner wall of the through groove is provided with a guide protrusion extending along the length direction of the sliding connection, and the outer wall of the first support rod is provided with a guide groove extending along the length direction of the first support rod, and the guide protrusion is adapted to the guide groove.

6. The shooting equipment bracket according to claim 1, characterized in that: The second locking component includes a knob, a first rotating body, and a locking bolt. One end of the first rotating body is connected to one end of the second support rod. A second rotating body is provided on the rotating component. The other end of the first rotating body and the second rotating body are rotatably connected. One end of the locking bolt passes through the first rotating body and the second rotating body and is threadedly connected to the knob. Rotating the knob can cause the first rotating body to press or release the second rotating body.

7. The shooting equipment bracket according to claim 6, characterized in that: The second locking component also includes two washers. The first rotating body is provided with a relief groove, and the second rotating body is rotatably positioned in the relief groove. Both washers are provided in the relief groove and are located on both sides of the second rotating body. The two washers are respectively sandwiched between the first rotating body and the second rotating body.

8. The shooting equipment bracket according to claim 1, characterized in that: One end of the first support rod is rotatably connected to a universal ball joint, and the other end of the second support rod is connected to a base for support.

9. The shooting equipment bracket according to claim 1, characterized in that: The other end of the second support rod is connected to a clamping seat for clamping. The clamping seat is provided with a clamping space. The lower end of the clamping seat is rotatably connected to an adjusting member for adjusting the size of the clamping space. The upper end of the adjusting member extends into the clamping seat and is connected to a clamping plate. The clamping space is formed between the inner upper sidewall of the clamping seat and the upper sidewall of the clamping plate.

10. The shooting equipment bracket according to claim 9, characterized in that: The upper end of the clamping seat is connected to a fixed seat, and the other end of the second support rod is fixedly connected to a rotating seat. The rotating seat is rotatably connected to the fixed seat, and a fastening screw is threaded onto the fixed seat. The second support rod and the rotating seat extend into the fixed seat, and one end of the fastening screw can pass through the side wall of the fixed seat and extend into the fixed seat to press or loosen the second support rod.

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