A drying oven for processing trousers in garment production

Abstract

This invention discloses a drying oven for trousers processing in garment production, relating to the field of drying oven technology. It includes a drying oven body, with an equipment box fixedly mounted on the top. A control panel is fixedly mounted on the surface of the equipment box, and ventilation holes are provided on the surface of the equipment box. A door is installed on the surface of the drying oven body, and transparent glass is installed on the surface of the ventilation holes. An embedded handle is provided on the surface of the ventilation holes. A junction box is located on one side of the drying oven body, and a base plate is fixedly connected to the bottom of the drying oven body. This invention has a reasonable structure. The frame can be installed and disassembled using docking and adjusting components, and the installation components facilitate the fixing of trousers, allowing the drying oven body to dry both sides of the trousers.

Description

Technical Field

[0001] This invention relates to the field of drying oven technology, and in particular to a drying oven for processing trousers in garment production. Background Technology

[0002] Trousers, also known as nonwoven fabric or woven fabric, are sheets, webs or pads made of fibers arranged in a directional or random manner, which are bonded together by friction, cohesion or adhesion, or a combination of these methods. Trousers are characterized by being moisture-proof, breathable, flexible, lightweight, non-flammable, easily degradable, non-toxic and non-irritating, available in a variety of colors, inexpensive, and recyclable.

[0003] The announcement number CN213273535U discloses a drying device for garment processing, including a drying box with a drying trough inside. Support seats are fixedly connected to both sides of the bottom center of the drying trough, and drying rods are fixedly connected to the outer walls of the support seats. A heating tank is fixedly connected to the top of the drying box, and electric heating tubes are fixedly connected to the top and bottom of the inner wall of the heating tank. A hot air pipe is fixedly connected to the right side of the heating tank. An air inlet slot is provided on the right side of the drying box at the corresponding position of the hot air pipe. By setting up the drying box, heating tank, hot air pipe, electric heating tube, and temperature sensor, this invention solves the problem that currently, in the manufacturing of cosplay costumes, the dyed fabric needs to be dried. Generally, high-temperature steam is used to dry the fabric, which, although fast, easily causes wrinkles on the rapidly heated fabric surface. Wrinkled fabric has a poor aesthetic appearance when manufacturing cosplay costumes.

[0004] There are still some issues with trousers when they are drying.

[0005] Existing trousers require a drying oven to remove surface moisture during processing to prevent mold growth during later use. However, when trousers are stacked inside the drying oven, the middle section of the trousers cannot be dried properly, which can affect the quality of the trousers later on. Summary of the Invention

[0006] The purpose of this application is to provide a drying box for trousers processing in garment production, which enables the frame to be installed and disassembled through docking components and adjustment components, and then the trousers to be fixed in place through the installation components, so that the drying box body can dry both sides of the trousers.

[0007] To achieve the above objectives, this application provides the following technical solution: a drying oven for trousers processing in garment production, comprising a drying oven body, an equipment box fixedly installed at the top of the drying oven body, a control panel fixedly installed on the surface of the equipment box, heat dissipation holes on the surface of the equipment box, a door installed on the surface of the drying oven body, transparent glass installed on the surface of the heat dissipation holes, an embedded handle on the surface of the heat dissipation holes, a junction box provided on one side of the drying oven body, a base plate fixedly connected to the bottom of the drying oven body, and foot cups fixedly connected to the four corners of the bottom surface of the base plate; further comprising a docking assembly, an adjusting assembly, and an installation assembly, wherein the docking assembly is disposed inside the drying oven body for use with a frame, the adjusting assembly is disposed on the inner wall of the drying oven body for use with the docking assembly, and the installation assembly is disposed on the drying oven body for use in fixing trousers material.

[0008] Preferably, the docking assembly includes a frame disposed inside the drying oven body, a first fixing seat fixedly connected to one side of the frame, a first rod fixedly connected to the first fixing seat, a side plate fixedly connected to the inner wall of the drying oven body, a pair of side seats fixedly connected to the side plate, a first slot provided on the pair of side seats, and both ends of the first rod being engaged inside the first slot.

[0009] Preferably, a second fixed seat is fixedly connected to the other side of the frame, a second rod is fixedly connected to the second fixed seat, a fixed plate is fixedly connected to the inner wall of the drying oven body, a support plate is fixedly connected to the fixed plate, a positioning plate is fixedly connected to the middle of the top surface of the support plate, and a movable plate is fixedly connected to the top of the positioning plate.

[0010] Preferably, the movable plate is slidably connected to a slide plate, and the two ends of the slide plate are fixedly connected to limit seats. The top of the limit seat is provided with a second slot, and the two ends of the second rod are locked inside the second slot.

[0011] Preferably, the adjustment assembly includes a pair of first bearings fixedly mounted on the fixed plate, a rotating rod rotatably connected between the pair of first bearings, a gear fixedly mounted at the middle of the rotating rod, and a handle fixedly connected to one end of the rotating rod.

[0012] Preferably, both ends of the rotating rod are fixedly connected to arm plates, the arm plates are provided with sliding grooves, and pulleys are slidably connected inside the sliding grooves, with one end of the pulleys rotatably connected to the limiting seat.

[0013] Preferably, a bracket is fixedly connected to the fixing plate, a pair of fixing rods are fixedly connected to the bracket, a baffle is fixedly connected to the top of the pair of fixing rods, an adjusting plate is slidably connected to the pair of fixing rods, a first spring is sleeved on the pair of fixing rods, a top block is fixedly connected to the top surface of the adjusting plate, and a locking tooth is provided on the top surface of the top block, the locking tooth being engaged with the gear.

[0014] Preferably, the mounting assembly includes a guide groove formed on the frame, a sliding shaft slidably connected inside the guide groove, one end of the sliding shaft being fixedly connected to a sleeve block, the sleeve block being slidably connected to a crossbar, both ends of the crossbar being fixedly connected to the inner wall of the frame, a support base being fixedly connected to the top surface of the sleeve block, and a mating seat being rotatably connected to the support base.

[0015] Preferably, an L-shaped plate is fixedly connected to the middle position of the docking seat, a threaded rod is threadedly connected to the L-shaped plate, the bottom end of the threaded rod is rotatably connected to the pressure plate, and the two ends of the pressure plate are slidably connected to the docking seat.

[0016] Preferably, a horizontal plate is fixedly connected between the sleeve blocks, and a rod is movably inserted into the middle of the horizontal plate. A ring is fixedly connected to the rod, and a button is fixedly connected to the top of the rod. A second spring is sleeved on the rod. A limiting plate is fixedly connected inside the frame, and several sets of circular holes are opened on the limiting plate. The bottom end of the rod is inserted into one of the circular holes.

[0017] In summary, the present invention has the following beneficial effects: 1. The present invention has a reasonable structure. When installing the frame, a first fixing seat is fixedly connected to one side of the frame, and a first rod is fixedly connected to the first fixing seat. The two ends of the first rod are locked inside the first slot. Then, the limiting seat is pulled, and the sliding plate slides inside the movable plate by pulling the limiting seat. A second slot is opened on one side of the top of the limiting seat. A second fixing seat is fixedly connected to the other side of the frame, and a second rod is fixedly connected to the second fixing seat. The two ends of the second rod are locked inside the second slot, so as to facilitate fixing the frame as a whole to the inside of the drying oven body. 2. In this invention, when disassembling the frame, the adjusting plate is pulled downwards to slide on the fixed rod. A top block is fixedly connected to the top surface of the adjusting plate, and the locking teeth on the top block are locked onto the gear by the elastic force of the first spring. By pulling the adjusting plate, the locking teeth are disengaged from the gear. Then, the throttle is rotated to drive the rotating rod to rotate. The rotation of the rotating rod drives the arm plate to rotate, which facilitates the sliding of the pulley inside the slide groove, thereby facilitating the movement of the position of the limiting seat and disengaging the second rod from the inside of the second locking groove. 3. In this invention, the two ends of the trousers are placed inside the docking seat, and then the threaded rod is rotated. The rotation of the threaded rod causes the pressure plate to move downward. The movement of the pressure plate facilitates the fixing of the trousers inside the docking seat. Then, the button is pulled upward to disengage the bottom end of the insertion rod from the inside of the round hole. Then, the limiting plate is moved to allow the sleeve block to slide on the crossbar, increasing the stability of the support seat movement. When the position of the support seat is adjusted, the button is released, and the elastic force of the second spring causes the bottom end of the insertion rod to be inserted into the inside of the round hole, thereby facilitating the fixing of the trousers to the frame. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the drying oven body; Figure 2 This is a schematic diagram of the internal three-dimensional structure of the drying oven. Figure 3 This is a schematic diagram of the three-dimensional frame structure; Figure 4 This is a schematic diagram of the frame's three-dimensional structure viewed from below. Figure 5 This is a top-down view of the three-dimensional structure of the frame; Figure 6 This is a schematic diagram of the three-dimensional structure of the support base; Figure 7 for Figure 4 Enlarged structural diagram at point A in the middle; Figure 8 for Figure 4 Enlarged structural diagram at point B.

[0020] In the diagram: 1. Drying oven body; 101. Equipment box; 102. Control panel; 103. Ventilation vents; 104. Door; 105. Transparent glass; 106. Embedded handle; 107. Junction box; 108. Base plate; 109. Foot cup; 2. Frame; 201. First fixed seat; 202. First rod; 203. Side plate; 204. Side seat; 205. First slot; 206. Second fixed seat; 207. Second rod; 208. Fixed plate; 209. Support plate; 210. Positioning plate; 211. Movable plate; 212. Slide plate; 213. Limiting seat; 214. Second slot; 3. First shaft seat; 01. Rotating rod; 302. Gear; 303. Throttle; 304. Arm plate; 305. Slide groove; 306. Pulley; 307. Bracket; 308. Fixed rod; 309. Baffle; 310. Adjusting plate; 311. First spring; 312. Top block; 313. Clamping tooth; 4. Guide groove; 401. Sliding shaft; 402. Sleeve block; 403. Crossbar; 404. Support seat; 405. Connecting seat; 406. L-shaped plate; 407. Threaded rod; 408. Pressure plate; 409. Horizontal plate; 410. Insert rod; 411. Ring; 412. Button; 413. Second spring; 414. Limiting plate; 415. Round hole. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example: Reference Figure 1 - Figure 8 The drying oven for trousers processing in garment production, as shown, includes a drying oven body 1. An equipment box 101 is fixedly installed on the top of the drying oven body 1. A control panel 102 is fixedly installed on the surface of the equipment box 101. Heat dissipation holes 103 are provided on the surface of the equipment box 101. A door 104 is installed on the surface of the drying oven body 1. Transparent glass 105 is installed on the surface of the heat dissipation holes 103. An embedded handle 106 is provided on the surface of the heat dissipation holes 103. A junction box 107 is provided on one side of the drying oven body 1. A base plate 108 is fixedly connected to the bottom of the drying oven body 1. Foot cups 109 are fixedly connected to the four corners of the bottom surface of the base plate 108. The drying oven also includes a docking assembly, an adjusting assembly, and a mounting assembly. The docking assembly is located inside the drying oven body 1 for use with a frame 2. The adjusting assembly is located on the inner wall of the drying oven body 1 for use with the docking assembly. The mounting assembly is located on the drying oven body 1 for fixing the trousers material.

[0023] Specifically, it should be noted that the trousers inside the drying chamber 1 are dried through the equipment box 101, and the drying parameters can be adjusted through the control panel 102. The equipment box 101 can be powered through the junction box 107. The specific working principles are based on existing technology and will not be elaborated on here.

[0024] In one embodiment of this invention, the docking assembly includes a frame 2 disposed inside the drying oven body 1. A first fixing seat 201 is fixedly connected to one side of the frame 2, and a first rod 202 is fixedly connected to the first fixing seat 201. A side plate 203 is fixedly connected to the inner wall of the drying oven body 1, and a pair of side seats 204 are fixedly connected to the side plate 203. A first slot 205 is provided on the pair of side seats 204, and both ends of the first rod 202 are engaged inside the first slot 205. A second fixing seat 206 is fixedly connected to the other side of the frame 2. A second rod 207 is fixedly connected to the seat 206. A fixed plate 208 is fixedly connected to the inner wall of the drying oven body 1. A support plate 209 is fixedly connected to the fixed plate 208. A positioning plate 210 is fixedly connected to the middle of the top surface of the support plate 209. A movable plate 211 is fixedly connected to the top of the positioning plate 210. A sliding plate 212 is slidably connected inside the movable plate 211. Limiting seats 213 are fixedly connected to both ends of the sliding plate 212. A second slot 214 is opened at the top of the limiting seat 213. Both ends of the second rod 207 are locked inside the second slot 214.

[0025] Specifically, when installing the frame 2, a first fixing seat 201 is fixedly connected to one side of the frame 2, and a first rod 202 is fixedly connected to the first fixing seat 201. The two ends of the first rod 202 are locked inside the first slot 205. Then, the limiting seat 213 is pulled, and the sliding plate 212 slides inside the movable plate 211 by pulling the limiting seat 213. A second slot 214 is opened on one side of the top of the limiting seat 213. A second fixing seat 206 is fixedly connected to the other side of the frame 2, and a second rod 207 is fixedly connected to the second fixing seat 206. The two ends of the second rod 207 are locked inside the second slot 214, so as to facilitate the overall fixing of the frame 2 to the inside of the drying oven body 1.

[0026] In one embodiment of this invention, the adjustment assembly includes a pair of first bearing seats 3 fixedly mounted on a fixed plate 208. A rotating rod 301 is rotatably connected between the pair of first bearing seats 3. A gear 302 is fixedly mounted at the middle of the rotating rod 301. A handle 303 is fixedly connected to one end of the rotating rod 301. Arm plates 304 are fixedly connected to both ends of the rotating rod 301. A sliding groove 305 is provided on the arm plate 304. A pulley 306 is slidably connected inside the sliding groove 305. One end of the pulley 306 rotates... The device is dynamically connected to the limiting seat 213. A bracket 307 is fixedly connected to the fixing plate 208. A pair of fixing rods 308 are fixedly connected to the bracket 307. A baffle 309 is fixedly connected to the top of the pair of fixing rods 308. An adjusting plate 310 is slidably connected to the pair of fixing rods 308. A first spring 311 is sleeved on the pair of fixing rods 308. A top block 312 is fixedly connected to the top surface of the adjusting plate 310. A locking tooth 313 is provided on the top surface of the top block 312. The locking tooth 313 is locked on the gear 302.

[0027] Specifically, when disassembling frame 2, the adjusting plate 310 is pulled downwards to slide on the fixed rod 308. A top block 312 is fixedly connected to the top surface of the adjusting plate 310, and the locking teeth 313 on the top block 312 are locked onto the gear 302 by the elastic force of the first spring 311. The pulling of the adjusting plate 310 causes the locking teeth 313 to disengage from the gear 302. Then, the throttle 303 is rotated to drive the rotating rod 301 to rotate. The rotation of the rotating rod 301 drives the arm plate 304 to rotate, thereby facilitating the sliding of the pulley 306 inside the slide groove 305, which facilitates the movement of the position of the limiting seat 213, so that the second rod 207 disengages from the inside of the second slot 214.

[0028] In one embodiment of this invention, the mounting assembly includes a guide groove 4 formed on the frame 2. A sliding shaft 401 is slidably connected inside the guide groove 4. One end of the sliding shaft 401 is fixedly connected to a sleeve block 402. The sleeve block 402 is slidably connected to a crossbar 403. Both ends of the crossbar 403 are fixedly connected to the inner wall of the frame 2. A support base 404 is fixedly connected to the top surface of the sleeve block 402. A mating seat 405 is rotatably connected to the support base 404. An L-shaped plate 406 is fixedly connected to the middle of the mating seat 405. A threaded rod 407 is threadedly connected to the L-shaped plate 406. The bottom end of rod 407 is rotatably connected to pressure plate 408, and the two ends of pressure plate 408 are slidably connected to docking seat 405. A horizontal plate 409 is fixedly connected between the sleeve blocks 402. A plug rod 410 is movably inserted into the middle of the horizontal plate 409. A ring 411 is fixedly connected to the plug rod 410. A button 412 is fixedly connected to the top of the plug rod 410. A second spring 413 is sleeved on the plug rod 410. A limit plate 414 is fixedly connected inside the frame 2. Several sets of round holes 415 are opened on the limit plate 414. The bottom end of the plug rod 410 is inserted into one of the round holes 415.

[0029] Specifically, the two ends of the trousers are placed inside the docking seat 405, and then the threaded rod 407 is rotated. The rotation of the threaded rod 407 causes the pressure plate 408 to move downward. The movement of the pressure plate 408 facilitates the fixation of the trousers inside the docking seat 405. Then, the button 412 is pulled upward to disengage the bottom end of the insertion rod 410 from the inside of the round hole 415. Then, the limiting plate 414 is moved to make the sleeve block 402 slide on the crossbar 403, increasing the stability of the support seat 404. When the position of the support seat 404 is adjusted, the button 412 is released. The elastic force of the second spring 413 causes the bottom end of the insertion rod 410 to be inserted into the inside of the round hole 415, thereby facilitating the fixation of the trousers on the frame 2.

[0030] The working principle of this invention is as follows: When installing the frame 2, a first fixing seat 201 is fixedly connected to one side of the frame 2, and a first rod 202 is fixedly connected to the first fixing seat 201. The two ends of the first rod 202 are locked inside the first slot 205. Then, the limiting seat 213 is pulled. The sliding plate 212 slides inside the movable plate 211 by pulling the limiting seat 213. A second slot 214 is opened on one side of the top of the limiting seat 213. A second fixing seat 206 is fixedly connected to the other side of the frame 2, and a second rod 207 is fixedly connected to the second fixing seat 206. The two ends of the second rod 207 are locked inside the second slot 214, so as to facilitate the overall fixing of the frame 2 to the inside of the drying oven body 1. When disassembling frame 2, pull the adjusting plate 310 downwards to slide it on the fixed rod 308. A top block 312 is fixedly connected to the top surface of the adjusting plate 310, and the locking teeth 313 on the top block 312 are locked onto the gear 302 by the elastic force of the first spring 311. Pulling the adjusting plate 310 causes the locking teeth 313 to disengage from the gear 302. Then, the throttle 303 is rotated to drive the rotating rod 301 to rotate. The rotation of the rotating rod 301 drives the arm plate 304 to rotate, which facilitates the sliding of the pulley 306 inside the slide groove 305, thereby facilitating the movement of the position of the limiting seat 213 and causing the second rod 207 to disengage from the inside of the second slot 214. Place both ends of the trousers inside the docking seat 405, then rotate the threaded rod 407. The rotation of the threaded rod 407 causes the pressure plate 408 to move downward. The movement of the pressure plate 408 facilitates the fixation of the trousers inside the docking seat 405. Then, pull the button 412 upward to disengage the bottom end of the insertion rod 410 from the inside of the round hole 415. Then, move the limiting plate 414 to make the sleeve block 402 slide on the crossbar 403, increasing the stability of the support seat 404. When the position of the support seat 404 is adjusted, release the button 412. The elastic force of the second spring 413 causes the bottom end of the insertion rod 410 to be inserted into the inside of the round hole 415, thereby facilitating the fixation of the trousers on the frame 2.

[0031] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A drying oven for processing trousers in garment production, comprising a drying oven body (1), characterized in that, An equipment box (101) is fixedly installed on the top of the drying oven body (1). A control panel (102) is fixedly installed on the surface of the equipment box (101). A heat dissipation hole (103) is opened on the surface of the equipment box (101). A door (104) is installed on the surface of the drying oven body (1). A transparent glass (105) is installed on the surface of the heat dissipation hole (103). An embedded handle (106) is opened on the surface of the heat dissipation hole (103). A junction box (107) is provided on one side of the drying oven body (1). A base plate (108) is fixedly connected to the bottom of the drying oven body (1). Foot cups (109) are fixedly connected to the four corners of the bottom surface of the base plate (108). It also includes a docking component, an adjustment component and an installation component. The docking component is disposed inside the drying chamber body (1) for use with the frame (2). The adjustment component is disposed on the inner wall of the drying chamber body (1) for use with the docking component. The installation component is disposed on the drying chamber body (1) for use to fix the trousers.

2. The drying oven for trousers processing in garment production according to claim 1, characterized in that: The docking assembly includes a frame (2) disposed inside the drying chamber body (1). A first fixing seat (201) is fixedly connected to one side of the frame (2). A first rod (202) is fixedly connected to the first fixing seat (201). A side plate (203) is fixedly connected to the inner wall of the drying chamber body (1). A pair of side seats (204) are fixedly connected to the side plate (203). A first slot (205) is provided on the pair of side seats (204). The two ends of the first rod (202) are engaged inside the first slot (205).

3. The drying oven for trousers processing in garment production according to claim 2, characterized in that: A second fixed seat (206) is fixedly connected to the other side of the frame (2), a second rod (207) is fixedly connected to the second fixed seat (206), a fixed plate (208) is fixedly connected to the inner wall of the drying box body (1), a tray (209) is fixedly connected to the fixed plate (208), a positioning plate (210) is fixedly connected to the middle of the top surface of the tray (209), and a movable plate (211) is fixedly connected to the top of the positioning plate (210).

4. The drying oven for trousers processing in garment production according to claim 3, characterized in that: The movable plate (211) is slidably connected to a slide plate (212). The two ends of the slide plate (212) are fixedly connected to a limiting seat (213). The top of the limiting seat (213) is provided with a second slot (214). The two ends of the second rod (207) are locked inside the second slot (214).

5. A drying oven for trousers processing in garment production according to claim 4, characterized in that: The adjustment assembly includes a pair of first bearings (3) fixedly mounted on the fixed plate (208), a rotating rod (301) rotatably connected between the pair of first bearings (3), a gear (302) fixedly mounted at the middle position of the rotating rod (301), and a throttle (303) fixedly connected to one end of the rotating rod (301).

6. A drying oven for trousers processing in garment production according to claim 5, characterized in that: The two ends of the rotating rod (301) are fixedly connected to the arm plate (304), and the arm plate (304) is provided with a sliding groove (305). A pulley (306) is slidably connected inside the sliding groove (305), and one end of the pulley (306) is rotatably connected to the limiting seat (213).

7. A drying oven for trousers processing in garment production according to claim 6, characterized in that: A bracket (307) is fixedly connected to the fixed plate (208), a pair of fixed rods (308) are fixedly connected to the bracket (307), a baffle (309) is fixedly connected to the top of the pair of fixed rods (308), an adjusting plate (310) is slidably connected to the pair of fixed rods (308), a first spring (311) is sleeved on the pair of fixed rods (308), a top block (312) is fixedly connected to the top surface of the adjusting plate (310), a locking tooth (313) is provided on the top surface of the top block (312), and the locking tooth (313) is locked on the gear (302).

8. A drying oven for trousers processing in garment production according to claim 1, characterized in that: The mounting assembly includes a guide groove (4) formed on the frame (2), a sliding shaft (401) is slidably connected inside the guide groove (4), one end of the sliding shaft (401) is fixedly connected to a sleeve block (402), the sleeve block (402) is slidably connected to a crossbar (403), both ends of the crossbar (403) are fixedly connected to the inner wall of the frame (2), a support seat (404) is fixedly connected to the top surface of the sleeve block (402), and a mating seat (405) is rotatably connected to the support seat (404).

9. A drying oven for trousers processing in garment production according to claim 8, characterized in that: An L-shaped plate (406) is fixedly connected to the middle of the docking seat (405). A threaded rod (407) is threadedly connected to the L-shaped plate (406). The bottom end of the threaded rod (407) is rotatably connected to the pressure plate (408). Both ends of the pressure plate (408) are slidably connected to the docking seat (405).

10. A drying oven for trousers processing in garment production according to claim 9, characterized in that: A horizontal plate (409) is fixedly connected between the sleeve blocks (402). A rod (410) is movably inserted into the middle of the horizontal plate (409). A ring (411) is fixedly connected to the rod (410). A button (412) is fixedly connected to the top of the rod (410). A second spring (413) is sleeved on the rod (410). A limiting plate (414) is fixedly connected inside the frame (2). Several sets of round holes (415) are opened on the limiting plate (414). The bottom end of the rod (410) is inserted into one of the round holes (415).

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