Pest trapping and killing device
By placing the induction light strip outside the sticky trap in the pest trapping device, the problem of the induction light source or induction agent being blocked is solved, achieving a highly efficient pest trapping effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-20
- Publication Date
- 2026-04-14
AI Technical Summary
In existing pest trapping devices, the trapping efficiency is low because the light source or attractant is blocked by the sticky material.
Design a pest trapping device by setting an attractant box and an attractant light strip on the top cover. The attractant light strip is wrapped around the outside of the sticky trap, and a net is wrapped between the attractant light strip and the sticky trap to avoid the sticky trap material blocking the attractant light source or attractant.
It improves the efficiency of pest trapping and killing, and achieves a high-efficiency integration of light trapping, bait trapping, and color board trapping, thus enhancing the trapping effect of the device.
Smart Images
Figure CN224111985U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pest trapping and killing, and in particular to a pest trapping and killing device. Background Technology
[0002] Pest traps are devices used to capture pests. Common types include light traps, pheromone traps, food traps, and physical traps.
[0003] In existing technologies, several of the above-mentioned trapping methods are often combined simultaneously to improve trapping efficiency. One method involves forming a cavity around a sticky material, then placing an induction light source or attractant inside the cavity to induce pests to adhere to the sticky material. However, in this setup, because the sticky material is typically adhesive tape, the induction light source or attractant is often blocked by the sticky material, reducing the trapping efficiency.
[0004] In existing technologies, the induction light source or inducing agent is placed in the middle of the trapping material, which causes the induction light source or inducing agent to be blocked to a certain extent, resulting in low trapping efficiency. Utility Model Content
[0005] This invention provides a pest trapping device that solves the problem of low trapping efficiency in existing technologies. The technical solution is as follows:
[0006] A pest trapping device includes: a base, a support rod, and a top cover.
[0007] The support rod is vertically mounted on the base, and the top cover is mounted on the support rod. A horizontal partition is located inside the top cover, with its bottom abutting against the top of the support rod. An attractant box is mounted on the partition. The top cover has a placement hole matching the attractant box, and a diffusion port communicating with the attractant box is located on the side wall of the top cover. Multiple mounting posts are mounted on the base, and an adhesive tape is wrapped around the periphery of each mounting post. A mesh cover is positioned between the top cover and the base, surrounding the adhesive tape. An induction light strip is located at the bottom of the top cover, surrounding the mesh cover and the adhesive tape.
[0008] Optionally, the top cover is provided with an attractant cap, which is placed over the placement hole.
[0009] Optionally, the top cover is provided with an annular protrusion located at the outer edge of the placement hole.
[0010] Optionally, a filter screen is provided on the diffuser port.
[0011] Optionally, it also includes a first locking strip, wherein a first annular locking groove is provided on the side wall of the top cover, and the first locking strip matches the first annular locking groove.
[0012] Optionally, it also includes a second locking strip, wherein the base is provided with a second annular locking groove, and the second locking strip matches the second annular locking groove.
[0013] Optionally, a plurality of the mounting posts are arranged in a circular array on the base.
[0014] Optionally, the mounting post is rotatably mounted on the base, the adhesive tape includes an adhesive plate and a release film, the base is provided with an mounting cylinder, an adhesive plate collecting cylinder and a release film collecting cylinder, the adhesive tape is mounted on the mounting cylinder, unused adhesive plates are wrapped around the periphery of multiple mounting posts, used adhesive plates are wrapped around the adhesive plate collecting cylinder, and the release film is wrapped around the release film collecting cylinder.
[0015] Optionally, an image sensor is provided on the base for identifying the number of pests on the sticky board. Both the sticky board collection tube and the release film collection tube are controlled to rotate by a motor, and the image sensor is signal-connected to the motor.
[0016] Optionally, the base has a mounting hole that matches the support rod. A groove is formed on the side wall of the mounting hole. A fixing ring is fixedly installed in the groove. A sliding rod passes through the fixing ring and is slidably disposed in the groove. A locking tongue is provided at the end of the sliding rod away from the fixing ring. A spring is provided between the fixing ring and the locking tongue and is sleeved on the sliding rod. A quick-change mechanism is provided at the bottom of the support rod. The quick-change mechanism includes a first sliding tongue, a second sliding tongue, and a stop. The first sliding tongue is fixedly disposed at the bottom of the support rod. The stop is arranged at a distance from the first sliding tongue. The second sliding tongue is sleeved on the support rod and is slidably disposed between the first sliding tongue and the stop. The first sliding tongue and the second sliding tongue are conical structures with opposite inclination directions of the conical surfaces. The locking tongue has an inclined surface with the same inclination direction as the first sliding tongue.
[0017] The beneficial effects of the technical solution provided by this utility model embodiment include at least the following:
[0018] This invention provides a pest trapping device. A support rod and base provide bottom support for the top cover, and a partition provides bottom support for the attractant box. The attractant box is positioned above the top cover, and an induction light strip is arranged around it below the top cover, outside the sticky trap. A net is also arranged around the induction light strip. When pests are attracted by the induction light strip or the attractant box, they pass through the net and encounter the sticky trap, becoming stuck and unable to move. This structure ensures that the sticky trap does not interfere with the attractant box and the induction light strip, allowing the device to attract pests more quickly and trap them on the sticky trap. This effectively integrates light trapping, bait trapping, and color board trapping, solving the problem of low trapping efficiency in existing technologies. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This is a schematic diagram of the overall structure of the device provided in this embodiment of the utility model;
[0021] Figure 2 This is a schematic diagram of the top cover structure provided in an embodiment of the present utility model;
[0022] Figure 3 This is a schematic diagram of the combination of the attractant box and the top cover provided in this embodiment of the utility model;
[0023] Figure 4 This is a top view of the device provided in this embodiment of the present invention after the top cover has been removed;
[0024] Figure 5 This is a schematic diagram of the main sectional view of the base provided in an embodiment of this utility model;
[0025] Figure 6 This is a schematic diagram of the cooperation between the support rod and the base provided in an embodiment of this utility model.
[0026] In the diagram: 1-Base; 11-Mounting post; 12-Second annular groove; 13-Mounting cylinder; 14-Adhesive plate collection cylinder; 15-Release film collection cylinder; 16-Image sensor; 17-Mounting hole; 171-Slide groove; 172-Fixing ring; 173-Slide rod; 174-Lock tongue; 175-Spring; 2-Support rod; 3-Top cover; 31-Partition plate; 32-Placement hole; 33-Diffuser port; 34-Attractant cover; 35-Annular protrusion; 36-First annular groove; 4-Attractant box; 5-Inducing light strip; 6-Adhesive tape; 61-Adhesive plate; 62-Release film; 7-Net cover; 71-First locking strip; 72-Second locking strip; 8-Quick change mechanism; 81-First sliding tongue; 82-Second sliding tongue; 83-Stop block. Detailed Implementation
[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.
[0028] Figure 1 This is a schematic diagram of the overall structure of the device provided in this embodiment of the utility model; Figure 2 This is a schematic diagram of the top cover structure provided in an embodiment of the present utility model; Figure 3 This is a schematic diagram of the combination of the attractant box and the top cover provided in this embodiment of the utility model; Figure 4 This is a top view of the device provided in this embodiment of the present invention after the top cover has been removed; Figure 5 This is a schematic diagram of the main sectional view of the base provided in an embodiment of this utility model; Figure 6 This is a schematic diagram showing the cooperation between the support rod and the base provided in an embodiment of this utility model. Figures 1 to 6 The pest trapping device shown includes: a base 1, a support rod 2, and a top cover 3. The support rod 2 is vertically mounted on the base 1, and the top cover 3 is mounted on the support rod 2. A horizontal partition 31 is provided inside the top cover 3, and the bottom of the partition 31 abuts against the top of the support rod 2. An attractant box 4 is provided on the partition 31. The top cover 3 has a placement hole 32 that matches the attractant box 4. A diffusion port 33 communicating with the attractant box 4 is provided on the side wall of the top cover 3. Multiple mounting posts 11 are provided on the base 1, and an adhesive trapping strip 6 is wrapped around the periphery of the multiple mounting posts 11. A net cover 7 is provided between the top cover 3 and the base 1, and the net cover 7 is arranged around the outside of the adhesive trapping strip 6. An induction light strip 5 is provided at the bottom of the top cover 3, and the induction light strip 5 is arranged around the net cover 7 and the adhesive trapping strip 6.
[0029] Exemplarily, in this embodiment of the invention, the sticky trap 6 can be set to different colors according to different target pests, equivalent to the function of a color chart, thereby attracting different kinds of pests for trapping and killing. The mounting post 11 is set on the base 1 to provide support for the sticky trap 6. The sticky trap 6 is wrapped around the mounting post 11 with the sticky side facing outwards for trapping pests. After the support rod 2 is installed on the base 1, the top cover 3 is installed on the support rod 2, with the bottom of the partition 31 and the top of the support rod 2 abutting against each other to provide support. The attractant box 4 can be selected and replaced according to the types of pests to be attracted. The attractant box 4 is placed inside the top cover 3 through the placement hole 32, and is supported by the top surface of the partition 31. Holes are opened on the side wall of the attractant box 4 inside the top cover 3. The attractant in the attractant box 4 diffuses out through the holes from the diffusion port 33 to attract nearby pests. The induction light strip 5 is fixed to the bottom of the top cover 3. The induction light strip 5 can display induction light sources of different wavelengths to attract different kinds of pests. The net cover 7 is wrapped around the top cover and the base 1, so that the net cover 7 encloses the induction light strip 5 and the sticky trap 6 inside. The net cover 7 can block large external interference objects and also block pests that fly into the net cover 7 to a certain extent, preventing pests from escaping into the device, thereby improving the trapping efficiency of the device.
[0030] This invention provides a pest trapping device. A support rod 2 and a base 1 provide bottom support for a top cover 3, and a partition 31 provides bottom support for an attractant box 4. The attractant box 4 is positioned above the top cover 3, and an induction light strip 5 is arranged around the bottom of the top cover 3, outside the sticky trap 6. A net cover 7 is also arranged around the outside of the induction light strip 5. When pests are attracted by the induction light strip 5 or the attractant box 4, they pass through the net cover 7 and then encounter the sticky trap 6, becoming stuck and unable to move. This structure ensures that the sticky trap 6 does not interfere with the attractant box 4 and the induction light strip 5, allowing the device to attract pests more quickly and trap them on the sticky trap 6. This effectively integrates light trapping, bait trapping, and color board trapping, solving the problem of low trapping efficiency in existing technologies.
[0031] Optionally, the top cover 3 is provided with an attractant cap 34, which covers the placement hole 32.
[0032] Exemplary, in embodiments of this utility model, such as Figure 3 As shown, by setting the attractant cover 34, the attractant box 4 placed in the placement hole 31 can be protected, preventing external rainwater and other impurities from entering the attractant box 4 and causing the attractant to deteriorate and become ineffective. By setting the attractant cover 34, the quality of the attractant is guaranteed, and the trapping efficiency of this device is further improved.
[0033] Optionally, the top cover 3 is provided with an annular protrusion 35, which is located on the outer edge of the placement hole 32.
[0034] Exemplary, in embodiments of this utility model, such as Figure 2 and Figure 3 As shown, when the attractant cap 34 is placed on the placement hole 32, some rainwater may still flow into the placement hole 32 through the contact gap between the attractant cap 34 and the top cover 3 during rain. Therefore, in order to block this rainwater, an annular protrusion 35 is provided around the placement hole 32. The rainwater entering the inside of the attractant cap is blocked by the annular protrusion 35 and cannot flow into the placement hole 32 to affect the attractant box 4. By setting this structure, the quality of the attractant is further guaranteed, thereby further improving the trapping efficiency of this device.
[0035] Optionally, a filter screen is provided on the diffuser 33.
[0036] For example, in this embodiment of the present invention, due to the influence of the attractant box 4, pests may directly enter the interior of the top cover 3 through the diffuser 33. In order to prevent this from happening, the pores provided on the diffuser 33 are smaller than the filter screen for pests, so as to isolate the pests.
[0037] Optionally, it also includes a first locking strip 71, and a first annular locking groove 36 is provided on the side wall of the top cover 3, the first locking strip 71 matching the first annular locking groove 36.
[0038] Exemplary, in embodiments of this utility model, such as Figure 1 and Figure 2 As shown, when installing the mesh cover 7, the upper part of the mesh cover 7 is covered on the first annular groove 36, and then the first clip 71 is pressed into the first annular groove 36. At this time, the upper part of the mesh cover 7 is fixed in the first annular groove 36. By setting this structure, the mesh cover 7 can be quickly installed and removed, which improves the ease of operation of this device.
[0039] Optionally, it also includes a second card strip 72, and a second annular card groove 12 is provided on the base 1, the second card strip 72 matching the second annular card groove 12.
[0040] Exemplary, in embodiments of this utility model, such as Figure 1 and Figure 6 As shown, when installing the mesh cover 7, the lower part of the mesh cover 7 is covered on the second annular groove 12, and then the second clip 72 is pressed into the second annular groove 12. At this time, the lower part of the mesh cover 7 is fixed in the second annular groove 12. By setting this structure, the mesh cover 7 can be quickly installed and removed, which improves the ease of operation of this device.
[0041] Optionally, multiple mounting columns 11 are arranged in a circular array on the base 1.
[0042] Exemplary, in embodiments of this utility model, such as Figure 4 As shown, the mounting posts 11 are arranged in a circular array on the base 1, which ensures that the sticky trap 6 wrapped around the mounting posts 11 has no dead corners. This allows the sticky trap 6 to trap pests from all directions. It also makes it easier to install and remove the sticky trap 6, and avoids issues such as the sticky trap 6 not sliding smoothly on the surface of the mounting posts 11 due to the angle. This further improves the ease of operation of this device.
[0043] Optionally, the mounting post 11 is rotatably mounted on the base 1, and the adhesive tape 6 includes an adhesive plate 61 and a release film 62. The base 1 is provided with a mounting cylinder 13, an adhesive plate collecting cylinder 14, and a release film collecting cylinder 15. The adhesive tape 6 is mounted on the mounting cylinder 13. Unused adhesive plates 61 are wrapped around the periphery of multiple mounting posts 11, used adhesive plates 61 are wrapped around the adhesive plate collecting cylinder 14, and the release film 62 is wrapped around the release film collecting cylinder 15.
[0044] Exemplary, in embodiments of this utility model, such as Figure 4 As shown, rotatably mounting the mounting post 11 on the base 1 changes the friction between the adhesive tape 6 and the mounting post 11 from static friction to rolling friction, thus reducing the friction between them. Setting the adhesive tape 6 in the form of an adhesive plate 61 and a release film 62 facilitates the winding of the adhesive tape 6 into a cylindrical structure, making it convenient for storage and unfolding. Figure 4 As shown, when too many sticky plates 61 are caught on the outer periphery of the sticky trapping band 6, the sticky plate collecting cylinder 14 is rotated clockwise and the release film collecting cylinder 15 is rotated counterclockwise. The sticky plates 61 located on the mounting posts 11 rotate clockwise along the circumference formed by the multiple mounting posts 11, and the used sticky plates 61 are wrapped around the sticky plate collecting cylinder 14. The release film 62, which is separated from the unused sticky plates 61, is wrapped around the release film collecting cylinder 15. The unused sticky plates 61 are rotated to the outer periphery of the mounting posts 11 by the left and right rotation of the sticky plate collecting cylinder 14 and the release film collecting cylinder 15. In this way, the outer periphery of the mounting posts 11 is renewed with unused sticky plates 61, so that the sticky plates 61 can continue to catch pests. By setting this structure, the sticky plates 61 can be replaced, maintaining their effectiveness and further improving the trapping efficiency of this device.
[0045] Optionally, an image sensor 16 is provided on the base 1. The image sensor 16 is used to identify the number of pests on the sticky board 61. The sticky board collection cylinder 14 and the release film collection cylinder 15 are both controlled to rotate by a motor. The image sensor 16 is connected to the motor signal.
[0046] In an exemplary embodiment of this invention, an image sensor 16 is disposed within the inner perimeter of the sticky plate 61. The image sensor 16 is used to acquire images of the sticky plate 61, upload them to the backend system, and automatically identify the types and quantities of pests collected on the sticky plate 61. When the image sensor 16 detects that the number of pests on the sticky plate 61 reaches a certain value, it transmits a signal to the motors of the sticky plate collection cylinder 14 and the release film collection cylinder 15, driving the motors to rotate. This causes the perimeter of the mounting column 11 to be replaced with unused sticky plates 61, allowing the sticky plates 61 to continue trapping pests. By setting this structure, the identification and automatic replacement of the sticky plates 61 can be achieved, improving the automation level of this device.
[0047] Optionally, the base 1 has a mounting hole 17 that matches the support rod 2. A groove 171 is formed on the side wall of the mounting hole 17. A fixing ring 172 is fixedly installed in the groove 171, and a sliding rod 173 passes through the fixing ring 172. The sliding rod 173 is slidably mounted in the groove 171. A locking tongue 174 is provided at the end of the sliding rod 173 away from the fixing ring 172. A spring 175 is provided between the fixing ring 172 and the locking tongue 174, and the spring 175 is sleeved on the sliding rod 173. A quick-change mechanism 8 is provided at the bottom. The quick-change mechanism 8 includes a first sliding tongue 81, a second sliding tongue 82, and a stop block 83. The first sliding tongue 81 is fixedly installed at the bottom of the support rod 2. The stop block 83 is arranged at intervals with the first sliding tongue 81. The second sliding tongue 82 is sleeved on the support rod 2 and is slidably installed between the first sliding tongue 81 and the stop block 83. The first sliding tongue 81 and the second sliding tongue 82 are tapered structures with opposite inclination directions of the tapered surfaces. The locking tongue 174 has an inclined surface with the same inclination direction as the first sliding tongue 81.
[0048] Exemplary, in embodiments of this utility model, such as Figure 5 and Figure 6As shown, multiple sliding grooves 171, multiple fixing rings 172, multiple sliding rods 173, and multiple locking tongues 174 can be provided in the mounting hole 17, and are evenly distributed along the circumference of the mounting hole 17. When the support rod 2 carrying the quick-change mechanism 8 is inserted downward into the mounting hole 17, the first sliding tongue 81 first contacts the inclined surface of the locking tongue 174. Since the inclination direction of the first sliding tongue 81 is the same as the inclination direction of the inclined surface of the locking tongue 174, when a downward force is applied to the support rod 2, the first sliding tongue 81 can push the locking tongue toward the inside of the sliding groove 171. At this time, the spring 175 is compressed, so that the support rod 2 can continue to move downward. When the locking tongue 174 passes the first sliding tongue 81 and is located between the first sliding tongue 81 and the second sliding tongue 82, since the maximum distance between the first sliding tongue 81 and the second sliding tongue 82 is the same as the height of the locking tongue 174, the locking tongue 174 is restricted between the first sliding tongue 81 and the second sliding tongue 82. At this time, the fixation of the support rod 2 is completed. When it is necessary to remove the support rod 2, a greater downward force can be applied to the support rod 2, causing the locking tongue 174 to pass over the second sliding tongue 82 and reach above the second sliding tongue 82. At this time, since the second sliding tongue 82 can slide on the support rod 2, the second sliding tongue 82 slides downward and fits against the first sliding tongue 81. Then, the support rod 2 is pulled upward, allowing the locking tongue 174 to slide downward on the conical surface of the second sliding tongue 82. At this time, the locking tongue 174 passes over both the second sliding tongue 82 and the first sliding tongue 81, allowing the support rod 2 to be removed from the mounting hole 17. By setting this structure, the operation is convenient; only a downward or upward force needs to be applied to the support rod 2 to fix or remove it, thereby further improving the ease of operation of this device.
[0049] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising” or “including” and similar terms mean that the elements or objects preceding “comprising” or “including” encompass the elements or objects listed following “comprising” or “including” and their equivalents, and do not exclude other elements or objects. The terms “connected” or “linked” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0050] The above description is only an optional embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A pest trapping device, characterized in that, include: The base (1), support rod (2), and top cover (3) The support rod (2) is vertically mounted on the base (1), and the top cover (3) is mounted on the support rod (2). A horizontal partition (31) is provided inside the top cover (3). The bottom of the partition (31) abuts against the top of the support rod (2). An attractant box (4) is mounted on the partition (31). A placement hole (32) matching the attractant box (4) is provided on the top cover (3). A placement hole (32) matching the attractant box (4) is provided on the side wall of the top cover (3). The diffuser (33) is connected to the base (1). Multiple mounting posts (11) are provided on the base (1). Adhesive tape (6) is wrapped around the periphery of the multiple mounting posts (11). A mesh cover (7) is provided between the top cover (3) and the base (1). The mesh cover (7) is arranged around the outside of the adhesive tape (6). A guide light strip (5) is provided at the bottom of the top cover (3). The guide light strip (5) is arranged around the mesh cover (7) and the adhesive tape (6).
2. The pest trapping device according to claim 1, characterized in that, The top cover (3) is provided with an attractant cap (34), which is placed over the placement hole (32).
3. The pest trapping device according to claim 2, characterized in that, The top cover (3) is provided with an annular protrusion (35), which is located on the outer edge of the placement hole (32).
4. The pest trapping device according to claim 1, characterized in that, A filter screen is provided on the diffuser (33).
5. The pest trapping device according to claim 1, characterized in that, It also includes a first locking strip (71), and a first annular locking groove (36) is provided on the side wall of the top cover (3), and the first locking strip (71) matches the first annular locking groove (36).
6. The pest trapping device according to claim 1, characterized in that, It also includes a second locking strip (72), and the base (1) is provided with a second annular locking groove (12), the second locking strip (72) matching the second annular locking groove (12).
7. The pest trapping device according to claim 1, characterized in that, Multiple mounting posts (11) are arranged in a circular array on the base (1).
8. The pest trapping device according to claim 1, characterized in that, The mounting post (11) is rotatably mounted on the base (1). The adhesive tape (6) includes an adhesive plate (61) and a release film (62). The base (1) is provided with an mounting cylinder (13), an adhesive plate collection cylinder (14), and a release film collection cylinder (15). The adhesive tape (6) is mounted on the mounting cylinder (13). Unused adhesive plates (61) are wrapped around the periphery of multiple mounting posts (11). Used adhesive plates (61) are wrapped around the adhesive plate collection cylinder (14). The release film (62) is wrapped around the release film collection cylinder (15).
9. The pest trapping device according to claim 8, characterized in that, An image sensor (16) is provided on the base (1). The image sensor (16) is used to identify the number of pests on the sticky board (61). The sticky board collection tube (14) and the release film collection tube (15) are both controlled to rotate by a motor. The image sensor (16) is connected to the motor signal.
10. The pest trapping device according to claim 1, characterized in that, The base (1) has a mounting hole (17) that matches the support rod (2). A groove (171) is provided on the side wall of the mounting hole (17). A fixing ring (172) is fixedly installed in the groove (171). A sliding rod (173) passes through the fixing ring (172). The sliding rod (173) is slidably installed in the groove (171). A locking tongue (174) is provided at the end of the sliding rod (173) away from the fixing ring (172). A spring (175) is provided between the fixing ring (172) and the locking tongue (174). The spring (175) is sleeved on the sliding rod (173). The support rod (2) The bottom is provided with a quick-change mechanism (8), which includes a first sliding tongue (81), a second sliding tongue (82) and a stop (83). The first sliding tongue (81) is fixedly disposed at the bottom of the support rod (2). The stop (83) is arranged at intervals with the first sliding tongue (81). The second sliding tongue (82) is sleeved on the support rod (2) and slidably disposed between the first sliding tongue (81) and the stop (83). The first sliding tongue (81) and the second sliding tongue (82) are conical structures with opposite inclination directions of the conical surfaces. The locking tongue (174) has an inclined surface, which is in the same inclination direction as the first sliding tongue (81).