Luggage for lazy person to slide doll

Abstract

The utility model relates to the technical field of luggage, in particular to a lazy doll walking luggage, which comprises a luggage case, the luggage case comprises a case body, the bottom surface of the case body is symmetrically and fixedly connected with four universal wheels I, the top surface of the case body is provided with a sitting area, the rear side wall of the case body is provided with an embedding groove I, and the embedding groove I is provided with an embedded groove II. And second embedding grooves are formed in the positions, located on the two sides of the first embedding groove, of the rear side wall of the box body. According to the multifunctional luggage case disclosed by the utility model, the sleeve rod, the plurality of inserting holes I, the extension rod, the rotating block, the handle and the four universal wheels I are arranged in a matched manner, so that the luggage case can be conveniently suitable for parents with different heights to use, and the force application angle of pushing can be changed by rotating the rotating block, so that the luggage case can be conveniently and vertically pushed. Through cooperative arrangement of the first supporting frame, the second supporting frame, the inserting rod, the buckle, the multiple buckle grooves, the oxford cloth, the protection module and the safety belt, the sitting comfort of a child can be improved, and the sitting safety of the child is improved through the safety belt.

Description

Technical Field

[0001] The utility model relates to the technical field of bags, in particular to a bag for lazy people to take their children out for a stroll. Background Art

[0002] In the fast-paced modern life, parents are faced with increasingly heavy tasks of parenting. As children grow older, outdoor activities become an indispensable part of their growth. However, when taking children out, parents often need to carry many items, such as children's toys, snacks, clothes and parents' personal items. Traditional backpacks or handbags often cannot meet these needs. Although special baby carriages or strollers can carry more items, they are not convenient to use. Therefore, a kind of lazy baby walking bag that can carry enough items and is easy to carry and use has appeared on the market;

[0003] However, most of the existing baby strolling bags currently have support wheels unfolded, allowing children to sit on them and pull them at an angle. Although this structure is convenient to ride, it is not easy to move in crowded places because it occupies too much area. In addition, the guardrails of existing baby strolling bags are not comfortable enough and have a fixed angle, which can only block the child's waist. When the child dozes off, there is a risk of falling. Utility Model Content

[0004] The purpose of the utility model is to provide a bag for lazy people to walk their children, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A bag for lazy people to stroll around with their children comprises a suitcase, wherein the suitcase comprises a box body, the bottom surface of the box body is symmetrically fixedly connected to four universal wheels, the top surface of the box body is provided with a seating area, the rear side wall of the box body is provided with an embedding groove 1, the rear side wall of the box body is provided with embedding grooves 2 on both sides of the embedding groove 1, a pull rod is fixedly connected inside the embedding groove 1, two support legs are rotatably connected inside the two embedding grooves 2, the bottom ends of two support legs are fixedly connected to universal wheels 2, a reinforcement rod is fixedly connected between the two support legs, and a backrest is rotatably connected to the left and right sides of the box body near the top.

[0007] Furthermore, the pull rod includes a sleeve rod, the side wall of the sleeve rod is fixedly connected to the inner wall of the engaging groove one, the side wall of the sleeve rod is provided with a plurality of plug-in holes one at equal distances, the top surface of the sleeve rod is slidably connected with an extension rod, the top end of the extension rod is rotatably connected with a rotating block, the top surface of the rotating block is fixedly connected with a handle, the side wall of the extension rod corresponding to the plug-in hole one is provided with a plug-in hole two near the bottom end, and the interior of the extension rod is fixedly connected with a fixing plate.

[0008] The invention further comprises: a connecting rod is slidably connected to the top surface of the fixed plate, a block 1 is fixedly connected to the top of the connecting rod, a button 1 is fixedly connected to the side wall of the block 1, a button groove is provided on the side wall of the extension rod, the outer wall of the button 1 contacts the inner wall of the button groove, a reset spring 1 is fixedly connected between the block 1 and the fixed plate, a block 2 is fixedly connected to the bottom end of the connecting rod, a contact block is fixedly connected to the bottom surface of the block 2, a hollow block is fixedly connected to the inner bottom surface of the extension rod, two opposite side walls of the hollow block are provided with vertical sliding grooves, and the contact Two strip rods are symmetrically fixed to the two opposite side walls of the block, and the two opposite side walls of the two strip rods are fixedly connected with sliding columns. A slider is slidably connected to the inside of the hollow block, and the two side walls corresponding to the two vertical slide grooves are provided with oblique slide grooves. The two sliding columns are respectively slidably connected to the two oblique slide grooves, and the side wall of the slider is fixedly connected with a return spring 2, and the other end of the return spring 2 is fixedly connected to the inner wall of the hollow block. The side wall of the slider opposite to the return spring 2 is fixedly connected with a plug-in column, and the side wall of the hollow block is provided with a square groove for the plug-in column to pass through.

[0009] The backrest further comprises a support frame 1 and a support frame 2, the bottom end of the support frame 1 is rotatably connected to the left side wall of the box, the bottom end of the support frame 2 is rotatably connected to the right side wall of the box, the support frame 1 and the support frame 2 are respectively fixed to the left and right side walls of the box through adjusting knobs, the side walls of the support frame 1 and the support frame 2 are evenly spaced with a plurality of snap grooves, the top surfaces of the support frame 1 and the support frame 2 are slidably plugged with a plug rod, the bottom end of the plug rod is provided with a cavity, the side wall of the plug rod located at the cavity position is provided with a buckle matching the buckle groove, the side wall of the buckle is fixedly connected with a return spring 3, and the other end of the return spring 3 is fixedly connected to the inner wall of the cavity.

[0010] Preferably, Oxford cloth is fixedly connected between the two plug-in rods and the support frame 1 and the support frame 2.

[0011] Further, a cavity is opened inside the support frame 1 below the buckle groove at the lowest point, and a protective module is fixedly connected in the cavity, and the protective module includes a connecting block, the top surface of the connecting block is fixedly connected to the top surface of the cavity, the bottom surface of the connecting block is rotatably connected to a rotating column, the bottom end of the rotating column is fixedly connected to a ratchet, a pawl is rotatably connected inside the cavity, the pawl and the ratchet are meshed for transmission, a button 2 is fixedly connected to the end of the pawl, a reset spring 4 is fixedly connected to the side wall of the pawl, the other end of the reset spring 4 is fixedly connected to the inner wall of the cavity, a safety belt is wrapped around the outer wall of the rotating column, and the other end of the safety belt is detachably fixed to the outer wall of the support frame 2 by a buckle.

[0012] Furthermore, the bottom surface of the ratchet is fixedly connected to a rotating shaft 1, the bottom end of the rotating shaft 1 is fixedly connected to a bevel gear 1, the side wall of the support frame 1 is rotatably connected to a rotating shaft 2, one end of the rotating shaft 2 is fixedly connected to a bevel gear 2, the bevel gear 2 and the bevel gear 1 are meshed for transmission, and the other end of the rotating shaft 2 is fixedly connected to a winding knob.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. Through the coordinated arrangement of the sleeve rod, a plurality of plug holes, an extension rod, a rotating block, a handle and four universal wheels, the suitcase is easy to use for parents of different heights, and the pushing force angle can be changed by rotating the rotating block, so that the suitcase is easy to push upright.

[0015] 2. Through the coordination of the support frame 1, the support frame 2, the plug-in rod, the buckle, a plurality of buckle grooves, the Oxford cloth, the rotating column, the ratchet, the pawl, the button 2, the bevel gear 1, the bevel gear 2, the winding knob, the reset spring 4 and the safety belt, the contact area between the Oxford cloth and the child can be increased by stretching the plug-in rod, thereby increasing the comfort of the child riding, and the safety belt increases the safety of the child riding. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a lazy baby walking bag of the utility model;

[0017] Figure 2 It is a schematic diagram of the luggage structure in the utility model;

[0018] Figure 3 This is a schematic diagram of the split pull rod structure of the utility model;

[0019] Figure 4 It is a schematic diagram of the internal structure of the extension rod in the utility model;

[0020] Figure 5 It is a schematic diagram of the overall structure of the backrest in the utility model;

[0021] Figure 6 This is a schematic diagram of the internal structure of the plug-in rod in the utility model;

[0022] Figure 7 It is a schematic diagram of the internal structure of the backrest A area in the utility model;

[0023] Figure 8 It is a schematic diagram of the structure of the protection module in the utility model.

[0024] In the figure: 100, luggage box; 110, box body; 111, universal wheel 1; 120, seating area; 130, support leg; 131, universal wheel 2; 132, reinforcement rod; 200, pull rod; 210, sleeve rod; 211, plug hole 1; 220, extension rod; 221, rotating block; 222, handle; 223, button slot; 224, plug hole 2; 230, block 1; 2301, button 1; 231, return spring 1; 232, connecting rod; 233, block 2; 234, contact block; 235, strip rod; 236, fixing plate; 240, hollow block; 241, square slot; 2 42. Vertical slide; 250. Sliding block; 251. Oblique slide; 252. Reset spring 2; 253. Connecting column; 300. Backrest; 310. Support frame 1; 311. Adjustment knob; 320. Support frame 2; 330. Connecting rod; 331. Buckle; 332. Reset spring 3; 340. Protection module; 341. Connecting block; 342. Rotating column; 343. Ratchet; 344. Paw; 345. Button 2; 346. Bevel gear 1; 347. Bevel gear 2; 3471. Rotating shaft 2; 348. Winding knob; 349. Reset spring 4; 350. Safety belt; 360. Oxford cloth. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figures 1 to 8 In an embodiment of the utility model, a lazy baby walking bag includes a suitcase 100, which includes a box body 110. The bottom surface of the box body 110 is symmetrically fixedly connected to four universal wheels 111. The top surface of the box body 110 is provided with a seating area 120. The rear side wall of the box body 110 is provided with an embedding groove 1. The rear side wall of the box body 110 is provided with embedding grooves 2 on both sides of the embedding groove 1. A pull rod 200 is fixedly connected inside the embedding groove 1. Support legs 130 are rotatably connected inside the two embedding grooves 2. The bottom ends of the two support legs 130 are fixedly connected to universal wheels 131. A reinforcement rod 132 is fixedly connected between the two support legs 130. A backrest 300 is rotatably connected to the left and right sides of the box body 110 near the top.

[0027] Specifically, the interior of the box body 110 is used to place clothes, etc., and the surface of the seating area 120 is paved with a soft sponge cushion to increase the riding comfort of the child. Before the child sits, the backrest 300 can be unfolded, and then the pull rod 200 can be stretched to a suitable height, and then the support leg 130 can be pulled out from the second fitting groove to make the entire suitcase 100 tilted; when in a more crowded place, the support leg 130 can be put into the second fitting groove to make the suitcase 100 stand up. Since four universal wheels 111 are symmetrically fixed on the bottom surface of the box body 110, the suitcase 100 can be flexibly moved even without using the universal wheel 131.

[0028] Embodiment 1

[0029] like Figure 3-4 As shown, in this embodiment, the pull rod 200 includes a sleeve rod 210, the side wall of the sleeve rod 210 is fixedly connected to the inner wall of the fitting groove, a plurality of plug holes 211 are equidistantly provided on the side wall of the sleeve rod 210, an extension rod 220 is slidably plugged into the top surface of the sleeve rod 210, a rotating block 221 is rotatably connected to the top of the extension rod 220, a handle 222 is fixedly connected to the top surface of the rotating block 221, and a plug hole 211 is provided near the bottom of the side wall of the extension rod 220 corresponding to the plug hole 211. The second connection hole 224, the interior of the extension rod 220 is fixedly connected with a fixing plate 236, the top surface of the fixing plate 236 is slidably plugged with a connecting rod 232, the top of the connecting rod 232 is fixedly connected with a block 230, the side wall of the block 230 is fixedly connected with a button 2301, the side wall of the extension rod 220 is provided with a button groove 223, the outer wall of the button 2301 is in contact with the inner wall of the button groove 223, and a reset spring 230 is fixedly connected between the block 230 and the fixing plate 236. 1. The bottom end of the connecting rod 232 is fixedly connected with a block 233, the bottom surface of the block 233 is fixedly connected with a contact block 234, the inner bottom surface of the extension rod 220 is fixedly connected with a hollow block 240, two opposite side walls of the hollow block 240 are provided with vertical sliding grooves 242, two opposite side walls of the contact block 234 are symmetrically fixed with two strip rods 235, the opposite side walls of the two strip rods 235 are fixedly connected with sliding columns, the interior of the hollow block 240 is slidably connected with a slider 250, the slider The two side walls of 250 corresponding to the two vertical slide grooves 242 are both provided with oblique slide grooves 251, and the two slide columns are respectively slidably connected to the two oblique slide grooves 251. The side wall of the slider 250 is fixedly connected with a return spring 252, and the other end of the return spring 252 is fixedly connected to the inner wall of the hollow block 240. The side wall of the slider 250 opposite to the return spring 252 is fixedly connected with a plug-in column 253, and the side wall of the hollow block 240 is provided with a square groove 241 for the plug-in column 253 to pass through.

[0030] In this embodiment, a plurality of plug holes 211 are provided on the side wall of the sleeve rod 210, so that the pull rod 200 can be adapted to more people of different heights compared to the traditional suitcase 100, making it easier to pull. When in use, by pressing the button 2301 downward, the connecting rod 232 drives the block 233 to press the contact block 234. Since the vertical slide groove 242 and the inclined slide groove 251 limit the position of the sliding column on the strip rod 235, when the contact block 234 moves downward, the slider 250 will bring the plug column 253 to retract into the hollow block 240. At this time, the plug column 253 no longer fixes the plug hole 1 211 and the plug hole 224 together, and the extension rod 220 can be lifted by the handle 222 to move upward. Pull, adjust to the appropriate position and release button 1 2301, block 233 will no longer apply pressure to contact block 234 under the rebound action of return spring 1 231, and slider 250 will return to its original position under the rebound action of return spring 252, so that the slide column of contact block 234 that has lost pressure moves upward along inclined slide groove 251 and returns to its initial position, and the restored plug-in column 253 will be plugged into plug-in hole 224 and the corresponding plug-in hole 1 211, so that the length of pull rod 200 is fixed. When the suitcase 100 needs to be pushed vertically in a crowded area, the handle 222 can be held to rotate the rotating block 221 90 degrees with the connection position of the extension rod 220 and the rotating block 221 as the axis, which is more convenient for vertical pushing and force application.

[0031] like Figure 5-6 As shown, in this embodiment, the backrest 300 includes a support frame 1 310 and a support frame 2 320, the bottom end of the support frame 1 310 is rotatably connected to the left side wall of the box body 110, and the bottom end of the support frame 2 320 is rotatably connected to the right side wall of the box body 110, and the support frame 1 310 and the support frame 2 320 are respectively fixed to the left and right side walls of the box body 110 through the adjustment knob 311, and the side walls of the support frame 1 310 and the support frame 2 320 are evenly spaced and provided with a plurality of buckle 331 grooves, and the support frames The top surfaces of support frame one 310 and support frame two 320 are both slidably connected with a plug-in rod 330, a cavity is opened at the bottom end of the plug-in rod 330, the side wall of the plug-in rod 330 located at the cavity position is provided with a buckle 331 matching the buckle 331 groove, the side wall of the buckle 331 is fixedly connected with a return spring three 332, the other end of the return spring three 332 is fixedly connected to the inner wall of the cavity, and the Oxford cloth 360 is fixedly connected between the two plug-in rods 330 and the support frame one 310 and the support frame two 320.

[0032] In the specific implementation, before the child sits in the suitcase 100, the support frame 1 310 and the support frame 2 320 are synchronously rotated to make the pull rod 200 located above the seating area 120, and the plug-in rod 330 is perpendicular to the top surface of the box body 110. At this time, the Oxford cloth 360 is located at the child's waist and back, which is convenient for the child to lean on. When the child is tired and it is difficult for the child to sit upright, the two buckles 331 are pressed to shrink them into the plug-in rod 330, and then the plug-in rod 330 is pulled upward according to the child's height to extend the entire pull rod 200, and at the same time, the folded Oxford cloth 360 is made to be folded. The cloth 360 is unfolded, and after being adjusted to a suitable position, the buckle 331 is released. The buckle 331 will extend from the corresponding buckle 331 groove under the rebound action of the reset spring three 332 to form a fixation. At this time, the unfolded Oxford cloth 360 increases the contact area for the child to lean on. Then, the adjusting knob 311 is loosened, the angle of the pull rod 200 is adjusted, and the adjusting knob 311 is tightened to fix the support frame 1 310 and the support frame 2 320. At this time, the child can half-lyingly lean on the unfolded Oxford cloth 360, reducing the risk of the child being unable to sit steadily due to drowsiness.

[0033] Embodiment 2

[0034] like Figure 7-8 As shown, in this embodiment, a cavity is opened inside the support frame 1 310 below the buckle 331 groove at the lowest point, and a protective module 340 is fixedly connected in the cavity. The protective module 340 includes a connecting block 341, and the top surface of the connecting block 341 is fixedly connected to the top surface of the cavity. The bottom surface of the connecting block 341 is rotatably connected to a rotating column 342, and the bottom end of the rotating column 342 is fixedly connected to a ratchet 343. A pawl 344 is rotatably connected inside the cavity, and the pawl 344 and the ratchet 343 are meshed for transmission. A button 2 345 is fixedly connected to the end of the pawl 344, and a reset spring 4 349 is fixedly connected to the side wall of the pawl 344. The other end of the return spring four 349 is fixedly connected to the inner wall of the cavity, the outer wall of the rotating column 342 is wrapped with a safety belt 350, the other end of the safety belt 350 is detachably fixed to the outer wall of the support frame two 320 by a buckle, the bottom surface of the ratchet 343 is fixedly connected to the rotating shaft one, the bottom end of the rotating shaft one is fixedly connected to the bevel gear one 346, the side wall of the support frame one 310 is rotatably connected to the rotating shaft two 3471, one end of the rotating shaft two 3471 is fixedly connected to the bevel gear two 347, the bevel gear two 347 and the bevel gear one 346 are meshed for transmission, and the other end of the rotating shaft two 3471 is fixedly connected to the winding knob 348.

[0035] When the child is seated in the seating area 120, the button 345 is pressed, so that the pawl 344 squeezes the return spring 349 and no longer meshes with the ratchet wheel 343. At this time, the safety belt 350 can be pulled outward, and the end of the safety belt 350 and the support frame 320 are closed by the buckle 331. After the button 345 is released, the pawl 344 will continue to mesh with the ratchet wheel 343 under the rebound action of the return spring 4 349. Due to the characteristics of the ratchet wheel 343 and the pawl 344, the safety belt 350 cannot be pulled outward without pressing the button 345, thereby preventing the child from leaning forward and pulling the safety belt 350 apart when sitting, thereby increasing the safety of riding. When the safety belt 350 is pulled out too much or the safety belt 350 is not needed, the winding knob 348 can be rotated to make the bevel gear 2 347 and the bevel gear 1 346 mesh and transmit, so that the rotating column 342 rotates in the opposite direction to wind up the safety belt 350, which is easy to operate.

[0036] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0037] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A lazy baby walking bag, characterized in that: The luggage case (100) comprises a box body (110), the bottom surface of the box body (110) is symmetrically fixedly connected to four universal wheels (111), the top surface of the box body (110) is provided with a seating area (120), the rear side wall of the box body (110) is provided with a first engaging groove, the rear side wall of the box body (110) is provided with second engaging grooves on both sides of the first engaging groove, the interior of the first engaging groove is fixedly connected with a pull rod (200), the interior of the two second engaging grooves are rotatably connected with support legs (130), the bottom ends of the two support legs (130) are fixedly connected with the second universal wheel (131), and a reinforcement rod (130) is fixedly connected between the two support legs (130). 2), a backrest (300) is rotatably connected to the left and right sides of the box (110) near the top, and the backrest (300) includes a support frame 1 (310) and a support frame 2 (320), the bottom end of the support frame 1 (310) is rotatably connected to the left side wall of the box (110), and the bottom end of the support frame 2 (320) is rotatably connected to the right side wall of the box (110), and the support frame 1 (310) and the support frame 2 (320) are respectively fixed to the left and right side walls of the box (110) through an adjustment knob (311), and the side walls of the support frame 1 (310) and the support frame 2 (320) are evenly spaced and provided with a plurality of buckle (331) grooves, and the support frame 1 (310) and the support frame 2 (320) are rotatably connected to the left side wall of the box (110). ) are slidably plugged with a plug rod (330) on the top surface, a cavity is provided at the bottom end of the plug rod (330), a buckle (331) matching the buckle (331) groove of the plug rod (330) is provided on the side wall of the plug rod (330) at the cavity position, a return spring (332) is fixedly connected to the side wall of the buckle (331), the other end of the return spring (332) is fixedly connected to the inner wall of the cavity, an Oxford cloth (360) is fixedly connected between the two plug rods (330) and the support frame 1 (310) and the support frame 2 (320), a cavity is provided inside the support frame 1 (310) below the buckle (331) groove at the lowest point, a protective module (340) is fixedly connected in the cavity, The protection module (340) comprises a connecting block (341), the top surface of the connecting block (341) is fixedly connected to the top surface of the cavity, the bottom surface of the connecting block (341) is rotatably connected to a rotating column (342), the bottom end of the rotating column (342) is fixedly connected to a ratchet (343), a pawl (344) is rotatably connected inside the cavity, the pawl (344) and the ratchet (343) are meshed for transmission, the end of the pawl (344) is fixedly connected to a button 2 (345), the side wall of the pawl (344) is fixedly connected to a reset spring 4 (349), the other end of the reset spring 4 (349) is fixedly connected to the inner wall of the cavity, and the outer wall of the rotating column (342) is wrapped with a safety belt (350),The other end of the safety belt (350) is detachably fixed to the outer wall of the second support frame (320) by a buckle, the bottom surface of the ratchet (343) is fixedly connected to the rotating shaft 1, the bottom end of the rotating shaft 1 is fixedly connected to the bevel gear 1 (346), the side wall of the first support frame (310) is rotatably connected to the second rotating shaft (3471), one end of the second rotating shaft (3471) is fixedly connected to the bevel gear 2 (347), the bevel gear 2 (347) and the bevel gear 1 (346) are meshed for transmission, and the other end of the second rotating shaft (3471) is fixedly connected to the winding knob (348).

2. A lazy baby walking bag according to claim 1, characterized in that: The pull rod (200) includes a sleeve rod (210), the side wall of the sleeve rod (210) is fixedly connected to the inner wall of the engaging groove one, the side wall of the sleeve rod (210) is provided with a plurality of plug-in holes one (211) at equal intervals, the top surface of the sleeve rod (210) is slidably connected with an extension rod (220), the top end of the extension rod (220) is rotatably connected with a rotating block (221), the top surface of the rotating block (221) is fixedly connected with a handle (222), the side wall of the extension rod (220) corresponding to the plug-in hole one (211) is provided with a plug-in hole two (224) near the bottom end, and the interior of the extension rod (220) is fixedly connected with a fixing plate (236).

3. A lazy baby walking bag according to claim 2, characterized in that: The top surface of the fixed plate (236) is slidably connected with a connecting rod (232), the top of the connecting rod (232) is fixedly connected with a block 1 (230), the side wall of the block 1 (230) is fixedly connected with a button 1 (2301), the side wall of the extension rod (220) is provided with a button groove (223), the outer wall of the button 1 (2301) is in contact with the inner wall of the button groove (223), a return spring 1 (231) is fixedly connected between the block 1 (230) and the fixed plate (236), the bottom end of the connecting rod (232) is fixedly connected with a block 2 (233), the bottom surface of the block 2 (233) is fixedly connected with a contact block (234), the inner bottom surface of the extension rod (220) is fixedly connected with a hollow block (240), the two opposite side walls of the hollow block (240) are both provided with vertical sliding grooves (242), Two strip rods (235) are symmetrically fixed to the two opposite side walls of the contact block (234), and the two opposite side walls of the two strip rods (235) are fixedly connected with sliding columns. The hollow block (240) is slidably connected with a slider (250), and the two side walls of the slider (250) corresponding to the two vertical sliding grooves (242) are provided with inclined sliding grooves (251). The two sliding columns are respectively slidably connected with the two inclined sliding grooves (251). The side wall of the slider (250) is fixedly connected with a second return spring (252), and the other end of the second return spring (252) is fixedly connected to the inner wall of the hollow block (240). The side wall of the slider (250) opposite to the second return spring (252) is fixedly connected with a plug-in column (253), and the side wall of the hollow block (240) is provided with a square groove (241) for the plug-in column (253) to pass through.

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