Spraying device for lawn irrigation

Abstract

The utility model relates to the technical field of lawn irrigation, in particular to a spraying device for lawn irrigation, which comprises a support rod, a fixing ring slidably connected to the outside of the top of the support rod, a fixing rod fixedly connected to one side of the fixing ring, and a telescopic rod slidably connected to the inside of one end, away from the fixing ring, of the fixing rod. According to the adjustable lawn spraying device, through the arranged adjusting assembly, the spraying device can be adaptively adjusted according to the sizes of different lawn areas, and the adjustable lawn spraying device can be adjusted in a small area, so that the adjustable lawn spraying device can be used for spraying lawn in different areas. The water resource waste can be reduced by reducing the spraying diameter; and in a larger or irregular area, the spraying diameter is increased, so that comprehensive coverage can be ensured, and the overall irrigation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lawn irrigation, in particular to a spraying device for lawn irrigation. Background Art

[0002] A lawn refers to a grassland established or maintained artificially for greening and beautifying purposes. It is one of the symbols of the civilization degree of a country or a city. It refers to a ground cover with gramineous grasses and other slender-textured plants covering it and its roots and stolons filling the soil surface layer. It is suitable for beautifying the environment, garden landscape, purifying the air, maintaining soil and water, and providing outdoor activity and sports venues. During daily maintenance, in order to keep the lawn in long-term use, it generally needs to be irrigated and sprayed.

[0003] In the prior art, such as the "irrigation device for garden lawn" with the publication number of CN211458323U, which includes a diamond-shaped water tank and a sprinkler. A water pipe is fixedly connected to the center of the surface of the diamond-shaped water tank. A first threaded pipe is threadedly connected inside the water pipe. A round block is fixedly connected to the top of the first threaded pipe. A sprinkler is fixedly connected to the outer surface of the first threaded pipe. Although this technology can quickly drill holes and fix during installation, facilitating gardeners to fix the device in the soil, and the device is convenient and labor-saving to operate, it is the same as the traditional method in that the nozzle position of the traditional sprinkler is usually fixed and cannot be accurately adjusted according to the size of the lawn or the area to be irrigated. This means that regardless of the actual situation of the lawn, the spraying range and angle are fixed, resulting in uneven irrigation effect, insufficient irrigation in some areas, and waste of water resources in other areas. Secondly, the nozzle angle of the traditional sprinkler is usually not adjustable separately and cannot meet the precise spraying requirements under different irrigation needs. For example, when local intensive irrigation of the lawn is required, the traditional technology cannot achieve fine adjustment of the nozzle angle, resulting in an unsatisfactory irrigation effect. Content of the Utility Model

[0004] In view of this, the purpose of the present utility model is to provide a spraying device for lawn irrigation to solve the problems of insufficient flexibility and poor applicability of the existing spraying devices.

[0005] For the above purposes, the utility model provides a spraying device for lawn irrigation, which includes a support rod. An outer part of the top of the support rod is slidably connected with a fixing ring. One side of the fixing ring is fixedly connected with a fixing rod. An inner part of one end of the fixing rod far from the fixing ring is slidably connected with a telescopic rod. One end of the telescopic rod far from the fixing rod is fixedly connected with a fixing column. A bottom of the fixing column is provided with an adjusting component for adaptively spraying lawns of different sizes. The adjusting component includes a central block fixedly connected to the bottom end of the fixing column. An outer part of the central block is fixedly connected with a plurality of track plates in a circular shape. An inner part of one end of the track plate is slidably connected with an adjusting rod. One end of the adjusting rod far from the track plate is fixedly connected with a U-shaped clamp. An inner part of the U-shaped clamp is rotatably connected with a nozzle through a shaft. An outer part of the fixing column is provided with an angle-adjusting component for precisely spraying the lawn. The angle-adjusting component includes a pulling rope fixedly connected to one side of the top of the nozzle. An outer part of the top of the fixing column is fixedly connected with a positioning ring. An outer part of the positioning ring is fixedly connected with a plurality of positioning rods in a circular shape. One end of the pulling rope far from the nozzle is connected to the bottom of the positioning rod.

[0006] Preferably, a bottom of the central block is rotatably connected with an adjusting disc through a shaft. A plurality of arc-shaped grooves are annularly formed inside the adjusting disc. One side of one end of the adjusting rod far from the nozzle is fixedly connected with an adjusting column. One end of the adjusting column far from the adjusting rod is slidably clamped inside the arc-shaped groove.

[0007] Preferably, a top of the middle part of the adjusting disc is fixedly connected with a rotating column. One end of the rotating column penetrating through the inside of the fixing column is fixedly connected with an adjusting wheel. An outer part of the top of the fixing column is fixedly connected with a positioning disc. An inner part of the adjusting wheel is slidably connected with an inserting rod. A plurality of inserting holes are annularly formed on the top of the positioning disc. Positions of the inserting rod correspond to positions of the inserting holes.

[0008] Preferably, one side of the top of the nozzle is communicated with a connecting pipe. Between every two of the plurality of nozzles are respectively communicated with each other through the connecting pipe. One side of the positioning ring is fixedly connected with a fixing block. An inside of the fixing block is fixedly connected with a water delivery pipe. An output end of the water delivery pipe is communicated with an input end of the nozzle. An input end of the water delivery pipe is communicated with an output end of a water pump.

[0009] Preferably, an outer part of the bottom of the fixing column is fixedly connected with a plurality of fixing cylinders in a circular shape. Positions of the fixing cylinders are between every two of the plurality of track plates. The connecting pipes between every two of the plurality of nozzles penetrate through the inside of the fixing cylinders.

[0010] Preferably, one side of one end of the adjusting rod far from the track plate is fixedly connected with a spring. One end of the spring far from the adjusting rod is fixedly connected with one side of the bottom end of the nozzle at an inclined angle. The nozzle is connected with the adjusting rod at an inclined angle through the pulling of the spring.

[0011] Preferably, a plurality of first pulleys are annularly and rotatably connected to the outside of the bottom of the fixed column, and a plurality of second pulleys are annularly and rotatably connected to the bottom of the positioning ring. The number of the first pulleys and the second pulleys is adapted to the number of the pulling ropes.

[0012] Preferably, a plurality of hanging rings are fixedly connected to the bottom of the positioning rod. The end of the pulling rope away from the nozzle passes through the inside of the first pulley and the second pulley and is fixedly connected with a hook, and the outside of the hook is hung inside the hanging ring.

[0013] Preferably, a connecting cylinder is fixedly connected to one side of the fixing ring. One end of the connecting cylinder is rotatably connected with a knob. A screw rod is fixedly connected to the side of the knob opposite to the hanging ring. The outside of the end of the screw rod away from the knob is threadedly connected with the inside of the connecting cylinder, and the end of the screw rod away from the knob penetrates through the inside of the connecting cylinder and contacts the side of the support rod.

[0014] Advantages of the utility model:

[0015] 1. Through the arranged adjusting component, the spraying device can be adaptively adjusted according to the sizes of different lawn areas. In a smaller area, reducing the spraying diameter can reduce water resource waste; while in a larger or irregular area, increasing the spraying diameter can ensure full coverage, thereby improving the overall irrigation efficiency. During adjustment, by rotating the adjusting disc, the adjusting column is prompted to move along the track of the arc-shaped groove. At this time, the adjusting rod will slide inside the track plate, and then the nozzles connected to one end of the plurality of adjusting rods are adjusted for variable diameter in a circular shape, and then the plurality of nozzles are adapted to spray the lawns with different area sizes.

[0016] 2. Through the arranged angle-adjusting component, by means of the adjustment method of the spring at the bottom of the nozzle and the rope at the top of the nozzle pulling each other, each nozzle can independently adjust its spraying angle, so as to achieve precise irrigation of lawns with different heights and different inclined angles of terrain, thereby improving the flexibility of the spraying device. At the same time, this flexibility ensures that even under the lawn conditions of complex terrain, the water can be evenly, accurately and effectively distributed onto the lawn for irrigation. Description of the drawings

[0017] In order to more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only those of the present utility model. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

[0018] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present utility model;

[0019] Figure 2 is a schematic three-dimensional structure diagram of the adjustment component and the angle adjustment component of the present utility model;

[0020] Figure 3 is a partial schematic three-dimensional structure diagram of the adjustment component of the present utility model;

[0021] Figure 4 is a schematic three-dimensional structure diagram of the track plate and the adjustment disk of the present utility model;

[0022] Figure 5 is a partial schematic three-dimensional structure diagram of the angle adjustment component of the present utility model.

[0023] The markings in the figure are:

[0024] 1. Support rod; 2. Fixed ring; 3. Fixed rod; 4. Telescopic rod; 5. Fixed column; 6. Track plate; 7. Adjustment disk; 8. Arc groove; 9. Adjustment column; 10. Adjustment rod; 11. U-shaped clamp; 12. Nozzle; 13. Spring; 14. Pull rope; 15. First pulley; 16. Second pulley; 17. Positioning ring; 18. Positioning rod; 19. Hook; 20. Hanging ring; 21. Fixed block; 22. Water delivery pipe; 23. Fixed cylinder; 24. Connecting pipe; 25. Positioning disk; 26. Rotating column; 27. Adjusting wheel; 28. Insertion rod; 29. Insertion hole; 30. Connecting cylinder; 31. Knob; 32. Central block; 33. Screw. Detailed implementation manners

[0025] To make the purpose, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in combination with specific embodiments.

[0026] It should be noted that unless otherwise defined, the technical terms or scientific terms used in the present utility model should have the ordinary meanings understood by those with general skills in the field to which the present utility model belongs. The "first", "second" and similar words used in the present utility model do not represent any order, quantity or importance, but are only used to distinguish different components. Words such as "including" or "comprising" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. Words such as "connected" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right", etc. are only used to represent relative position relationships. When the absolute position of the described object changes, the relative position relationship may also change accordingly.

[0027] As in the present utility model Figures 1 to 5The shown sprinkler device for lawn irrigation includes a support rod 1. An outer part of the top of the support rod 1 is slidably connected with a fixing ring 2. One side of the fixing ring 2 is fixedly connected with a fixing rod 3. An inner part of one end of the fixing rod 3 away from the fixing ring 2 is slidably connected with a telescopic rod 4. One end of the telescopic rod 4 away from the fixing rod 3 is fixedly connected with a fixing column 5. A bottom of the fixing column 5 is provided with an adjusting component for adaptively spraying lawns of different sizes. The adjusting component includes a central block 32 fixedly connected to the bottom end of the fixing column 5. A plurality of track plates 6 are fixedly connected to the outside of the central block 32 in a ring shape. An inner part of one end of the track plate 6 is slidably connected with an adjusting rod 10. One end of the adjusting rod 10 away from the track plate 6 is fixedly connected with a U-shaped clamp 11. A nozzle 12 is rotatably connected to the inside of the U-shaped clamp 11 through a shaft. An outside of the fixing column 5 is provided with an angle-adjusting component for precisely spraying the lawn. The angle-adjusting component includes a pulling rope 14 fixedly connected to one side of the top of the nozzle 12. An outside of the top of the fixing column 5 is fixedly connected with a positioning ring 17. A plurality of positioning rods 18 are fixedly connected to the outside of the positioning ring 17 in a ring shape. One end of the pulling rope 14 away from the nozzle 12 is connected to the bottom of the positioning rod 18;

[0028] By setting the adjusting component, the sprinkler device can be adaptively adjusted according to the sizes of different lawn areas. In a smaller area, reducing the spraying diameter can reduce water resource waste; while in a larger or irregular area, increasing the spraying diameter can ensure full coverage, thereby improving the overall irrigation efficiency. During adjustment, by rotating the adjusting disc 7, the adjusting column 9 is urged to move along the track of the arc-shaped groove 8. At this time, the adjusting rod 10 will slide inside the track plate 6, and then the nozzles 12 connected to one end of the plurality of adjusting rods 10 are adjusted for variable diameter in a circular shape, and then the plurality of nozzles 12 perform adaptive spraying on lawns of different area sizes.

[0029] As Figures 1 to 4 shown, a bottom of the central block 32 is rotatably connected to an adjusting disc 7 through a shaft. A plurality of arc-shaped grooves 8 are annularly formed inside the adjusting disc 7. One side of one end of the adjusting rod 10 away from the nozzle 12 is fixedly connected with an adjusting column 9. One end of the adjusting column 9 away from the adjusting rod 10 is slidably clamped inside the arc-shaped groove 8. A top of the middle part of the adjusting disc 7 is fixedly connected with a rotating column 26. A top end of the rotating column 26 penetrates through one end inside the fixing column 5 and is fixedly connected with an adjusting wheel 27. An outside of the top of the fixing column 5 is fixedly connected with a positioning disc 25. An inserting rod 28 is slidably connected inside the adjusting wheel 27. A plurality of inserting holes 29 are annularly formed on the top of the positioning disc 25. The position of the inserting rod 28 corresponds to the position of the inserting holes 29;

[0030] Through the provided track plate 6 and adjusting plate 7, when adjusting the positions of multiple nozzles 12 for lawns of different areas, first rotate the rotating column 26 to cause the adjusting plate 7 to rotate. At this time, due to the limitation of the track plate 6, the adjusting column 9 will move along the track of the arc-shaped groove 8, thereby causing the adjusting column 9 to move the adjusting rod 10. At this time, the adjusting rod 10 will move the nozzle 12 at one end of the track plate 6, so that the distance between multiple nozzles 12 is adjusted in a circular variable diameter manner, enabling multiple nozzles 12 to perform adaptive spraying irrigation for lawns of different sizes, thus avoiding the problems of water resource waste and insufficient irrigation. At the same time, through the provided insertion rod 28 and insertion hole 29, when the position of the nozzle 12 is adjusted, insert one end of the insertion rod 28 through the inside of the adjusting wheel 27 and connect it to the insertion hole 29, thereby fixing the position of the rotating column 26, fixing the position of the nozzle 12, and avoiding the problem of multiple nozzles 12 moving during use.

[0031] As Figures 1 to 4 shown, one side of the top of the nozzle 12 is connected to a connecting pipe 24. Multiple nozzles 12 are respectively connected to each other through the connecting pipe 24 between two by two. One side of the positioning ring 17 is fixedly connected to a fixing block 21. The inside of the fixing block 21 is fixedly connected to a water delivery pipe 22. The output end of the water delivery pipe 22 is connected to the input end of the nozzle 12. The input end of the water delivery pipe 22 is connected to the output end of a water pump. The outside of the bottom of the fixing column 5 is fixedly connected with multiple fixing cylinders 23 in a ring shape. The positions of the fixing cylinders 23 are located between two of the multiple track plates 6. The connecting pipes 24 between two of the multiple nozzles 12 penetrate through the inside of the fixing cylinders 23;

[0032] Through the provided connecting pipe 24, it facilitates the water flow between multiple nozzles 12. At the same time, through the provided fixing cylinder 23, it can play a role in stabilizing the connecting pipe 24, thereby avoiding the problem that the connecting pipe 24 between two of the multiple nozzles 12 drops too long after adjustment, affecting the rotation of the adjusting plate 7.

[0033] As Figures 1 to 5 shown, one side of the end of the adjusting rod 10 away from the track plate 6 is fixedly connected to a spring 13. The end of the spring 13 away from the adjusting rod 10 is fixedly connected to one side of the bottom end of the nozzle 12 at an inclined angle. The nozzle 12 is connected to the adjusting rod 10 at an inclined angle through the pulling of the spring 13. The outside of the bottom of the fixing column 5 is rotationally connected with multiple first pulleys 15 in a ring shape. The bottom of the positioning ring 17 is rotationally connected with multiple second pulleys 16 in a ring shape. The number of the first pulleys 15 and the second pulleys 16 is adapted to the number of the pull ropes 14. The bottom of the positioning rod 18 is fixedly connected with multiple hanging rings 20. The end of the pull rope 14 away from the nozzle 12 passes through the inside of the first pulley 15 and the second pulley 16 and is fixedly connected to a hook 19. The outside of the hook 19 is hung inside the hanging ring 20;

[0034] Through the provided angle adjustment component, by means of the adjustment method of the cooperation between the spring 13 at the bottom of the nozzle 12 and the rope at the top of the nozzle 12, each nozzle can independently adjust its spraying angle, so as to achieve precise irrigation of lawns with different heights and different inclination angles of terrain, thereby improving the flexibility of the spraying device. At the same time, this flexibility ensures that even under the lawn conditions of complex terrain, it can evenly, precisely and effectively distribute water onto the lawn for irrigation. When adjusting the nozzle 12 to align with the lawn area that needs to be intensively irrigated, when pulling the hook 19 and hanging it on the hanging ring 20 at the bottom of the end of the positioning rod 18 away from the positioning ring 17, through the traction of the pull rope 14, the nozzle 12 will move to one side of the fixed column 5 based on the lever principle, and the top of the nozzle 12 will move towards one side away from the adjustment disc 7, thereby achieving the effect of adjusting irrigation outside the adjustment disc 7. At the same time, when the hook 19 is hung on the hanging ring 20 at the bottom of the end of the positioning rod 18 close to the positioning ring 17, due to the rebound of the spring 13, the spring 13 will pull the bottom output end of the nozzle 12 to move towards the side close to the adjustment disc 7, thereby achieving the effect of adjusting irrigation inside the adjustment disc 7. At the same time, by adjusting the angles of multiple nozzles 12 in this way, the effect of precisely irrigating a specific lawn can be achieved, thereby improving the survival rate of the lawn.

[0035] As Figures 1 to 5 Shown in the figure, one side of the fixed ring 2 is fixedly connected with a connecting cylinder 30. One end of the connecting cylinder 30 is rotatably connected with a knob 31. On the side of the knob 31 opposite to the hanging ring 20, a screw rod 33 is fixedly connected. The outer part of the end of the screw rod 33 away from the knob 31 is threadedly connected with the inside of the connecting cylinder 30, and the end of the screw rod 33 away from the knob 31 penetrates through the inside of the connecting cylinder 30 and contacts one side of the support rod 1;

[0036] By setting the knob 31 and the fixed ring 2, the height adjustment of multiple nozzles 12 can be achieved, which is convenient for irrigating lawns with different heights. During adjustment, slide the fixed ring 2 to adjust the height of the nozzle 12. When the position of the nozzle 12 is adjusted to a specific height, rotate the knob 31 to cause one end of the screw rod 33 to move towards the side close to the support rod 1 by means of the thread. When one end of the screw rod 33 touches one side of the support rod 1, the position of the fixed ring 2 is fixed, which is convenient for the use of the nozzle 12. At the same time, by setting the fixed rod 3 and the telescopic rod 4, it is convenient to adjust the distance between the nozzle 12 and the support rod 1, and thus convenient for adjusting the distance between multiple nozzles 12. During use, pull the telescopic rod 4 to cause the telescopic rod 4 to slide inside one end of the fixed rod 3, and thus the position of the nozzle 12 is adjusted, which is convenient for adjusting the distance between multiple nozzles 12.

[0037] Those of ordinary skill in the art should understand that: The discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the present utility model (including the claims) is limited to these examples; Under the concept of the present utility model, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the present utility model as described above, which are not provided in detail for the sake of brevity.

[0038] The present utility model aims to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A spraying device for lawn irrigation, characterized in that: The invention comprises a support rod (1), wherein the top of the support rod (1) is externally slidably connected to a fixing ring (2), one side of the fixing ring (2) is fixedly connected to a fixing rod (3), the fixing rod (3) is internally slidably connected to an end of the fixing rod (3) away from the fixing ring (2), the end of the telescopic rod (4) away from the fixing rod (3) is fixedly connected to a fixing column (5), the bottom of the fixing column (5) is provided with an adjustment component for adaptively spraying lawns of different sizes, the adjustment component comprises a central block (32) fixedly connected to the bottom end of the fixing column (5), the outer portion of the central block (32) is annularly fixedly connected to a plurality of track plates (6), the inner portion of one end of the track plate (6) is internally slidably connected to an adjustment rod (10), the end of the adjustment rod (10) away from the track plate (6) is fixedly connected to a U-shaped card (11), and the interior of the U-shaped card (11) is connected to a nozzle (12) through an axis rotation; The outside of the fixed column (5) is provided with an angle adjustment component for accurately spraying the lawn, and the angle adjustment component includes a pull rope (14) fixedly connected to one side of the top of the nozzle (12), the outside of the top of the fixed column (5) is fixedly connected to a positioning ring (17), the outside of the positioning ring (17) is annularly fixedly connected to a plurality of positioning rods (18), and the end of the pull rope (14) away from the nozzle (12) is connected to the bottom of the positioning rod (18).

2. A spraying device for lawn irrigation according to claim 1, characterized in that: The bottom of the center block (32) is connected to an adjustment disk (7) through an axis of rotation. The interior of the adjustment disk (7) is provided with a plurality of arc-shaped grooves (8) in an annular shape. The side of the adjustment rod (10) away from the nozzle (12) is fixedly connected to an adjustment column (9). The end of the adjustment column (9) away from the adjustment rod (10) is slidably engaged with the interior of the arc-shaped groove (8).

3. A spraying device for lawn irrigation according to claim 2, characterized in that: The top of the middle part of the adjusting disk (7) is fixedly connected to a rotating column (26); the top end of the rotating column (26) passes through the interior of the fixed column (5) and is fixedly connected to an adjusting wheel (27); the outside of the top of the fixed column (5) is fixedly connected to a positioning disk (25); the inside of the adjusting wheel (27) is slidably connected to an insertion rod (28); the top of the positioning disk (25) is provided with a plurality of insertion holes (29) in an annular shape; the positions of the insertion rods (28) correspond to the positions of the insertion holes (29).

4. A spraying device for lawn irrigation according to claim 1, characterized in that: One side of the top of the nozzle (12) is connected to a connecting pipe (24), and the plurality of nozzles (12) are connected to each other through the connecting pipe (24). One side of the positioning ring (17) is fixedly connected to a fixing block (21), and the interior of the fixing block (21) is fixedly connected to a water pipe (22). The output end of the water pipe (22) is connected to the input end of the nozzle (12), and the input end of the water pipe (22) is connected to the output end of the water pump.

5. A spraying device for lawn irrigation according to claim 4, characterized in that: The outside of the bottom of the fixed column (5) is annularly fixedly connected to a plurality of fixed cylinders (23), the fixed cylinders (23) are located between a plurality of track plates (6), and the connecting pipes (24) between the plurality of nozzles (12) pass through the interior of the fixed cylinders (23).

6. A spraying device for lawn irrigation according to claim 1, characterized in that: A spring (13) is fixedly connected to one side of the regulating rod (10) away from one end of the track plate (6); the end of the spring (13) away from the regulating rod (10) is fixedly connected to one side of the bottom end of the nozzle (12) at an inclined angle; the nozzle (12) is connected to the regulating rod (10) at an inclined angle by the pulling of the spring (13).

7. A spraying device for lawn irrigation according to claim 1, characterized in that: The outside of the bottom of the fixing column (5) is connected to a plurality of first pulleys (15) in an annular rotation manner, and the bottom of the positioning ring (17) is connected to a plurality of second pulleys (16) in an annular rotation manner. The number of the first pulleys (15) and the second pulleys (16) is adapted to the number of the pull ropes (14).

8. A spraying device for lawn irrigation according to claim 7, characterized in that: The bottom of the positioning rod (18) is fixedly connected to a plurality of hanging rings (20), and the end of the pull rope (14) away from the nozzle (12) passes through the inside of the first pulley (15) and the second pulley (16) and is fixedly connected to a hook (19), and the outside of the hook (19) is hung on the inside of the hanging ring (20).

9. A spraying device for lawn irrigation according to claim 1, characterized in that: One side of the fixing ring (2) is fixedly connected to a connecting tube (30), one end of the connecting tube (30) is rotatably connected to a knob (31), and a screw rod (33) is fixedly connected to the side of the knob (31) opposite to the hanging ring (20), the outside of the screw rod (33) away from the knob (31) is threadedly connected to the inside of the connecting tube (30), and the end of the screw rod (33) away from the knob (31) passes through the inside of the connecting tube (30) and contacts one side of the support rod (1).

Images