A telescopic shelf

Abstract

This invention discloses a telescopic storage rack, relating to the field of storage rack technology. It includes a rack body with four casters fixedly mounted at the bottom. Two linkage mechanisms are mounted on the side walls of the rack body, with several fixed plates and several rotating plates rotatably connected between the two linkage mechanisms. Through the arrangement of a protective disc, abutment shaft, sliding plate, irregularly shaped telescopic rod, U-shaped wedge block, locking disc, two semi-circular rings, two tension springs, two telescopic spring columns, and a sleeve, this invention automatically reduces the distance between the rotating plates and fixed plates when the road surface inclination angle exceeds 30 degrees. The rotating plates and fixed plates clamp the bottles between them, preventing them from slipping and ensuring that the liquid inside does not spill. Simultaneously, the linkage mechanisms lower the rack's height and increase its base area, lowering the center of gravity and facilitating movement by personnel. This prevents the rack from tipping over due to an excessively high center of gravity during transport, ensuring safe transport.

Description

Technical Field

[0001] This invention relates to the field of shelving technology, specifically a telescopic shelving. Background Technology

[0002] Storage racks are shelves made of a base plate and support columns for storing miscellaneous items. They are mostly supported by strip-shaped brackets and supported by a base plate. They have a unique shape, ingenious design, are easy to assemble and disassemble, are clean and bright, and have an open design that makes the stored items visible at a glance. They are mostly used to store miscellaneous items and are commonly used in places such as express delivery stations and supermarkets to increase the utilization of space.

[0003] Most existing shelves are fixed to the base plate and support columns with bolts. This is very complicated for multi-layer shelves and disassembly. However, when craftspeople are moving materials to the market, medical staff are transporting sample reagent bottles, or baristas are moving coffee shelves, they often need to carry them. When carrying them over uneven surfaces or slopes, the bottles may shake and spill the liquid inside. In severe cases, the bottles on the shelves may tip over and break, even injuring staff and causing a lot of losses. Summary of the Invention

[0004] The present invention addresses the problem that existing technical solutions are too simplistic by providing a solution that is significantly different from existing technologies. Specifically, the purpose of the present invention is to provide a telescopic storage rack to solve the problems mentioned in the background.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a telescopic storage rack, comprising a frame body, four universal wheels fixedly mounted at the bottom of the frame body, two linkage mechanisms mounted on the side wall of the frame body, a plurality of fixed plates and a plurality of rotating plates rotatably mounted between the two linkage mechanisms, an adjustment mechanism mounted on the side wall of the rotating plates, a balancing mechanism fixedly mounted on the side wall of the frame body, a linkage mechanism mounted on the side wall of the balancing mechanism, a switching mechanism rotatably mounted on the side wall of the frame body, and a protection mechanism mounted on the side wall of the frame body.

[0006] Preferably, both linkage mechanisms include a plurality of first shafts, a plurality of second shafts, a plurality of first connecting rods, a plurality of sliders, and a plurality of second connecting rods. The plurality of first shafts are respectively fixedly mounted on the side wall of the corresponding fixed plate. The two ends of the plurality of first connecting rods and second connecting rods are respectively offset and rotatably mounted on the corresponding first shafts. The plurality of second shafts are rotatably mounted at the overlapping part of the first connecting rods and second connecting rods. The sliders are fixedly mounted at the end of the second shafts and are limited and slidably engaged with the side wall of the frame.

[0007] Preferably, the first gear and the second gear mesh, the first gear meshes with the corresponding L-shaped rack, and the third gear meshes with another L-shaped rack.

[0008] Preferably, the balancing mechanism includes a float, a central shaft, a water wheel, a first gear, a second gear, a gear ring, and a central column. The water wheel is fixedly mounted on the side wall of the frame. The central shaft is rotatably mounted at the center of the water wheel. The float is fixedly mounted on the central shaft. The first gear is rotatably mounted inside the central column. The central column is rotatably mounted through the center of the central shaft. The second gear is fixedly mounted on the central column. The gear ring is fixedly mounted on the inner wall of the central shaft. The second gear meshes with both the gear ring and the first gear. The water wheel is filled with water at half its volume.

[0009] Preferably, the protection mechanism includes a protective disc, an abutment shaft, a sliding plate, a special-shaped telescopic rod, a U-shaped wedge block, a locking disc, two semi-circular rings, two tension springs, two telescopic spring posts, and a sleeve. The locking disc is fixedly mounted on the end of the cylinder, the sleeve is fixedly mounted on the side wall of the adjusting plate, the two semi-circular rings are inserted into the inner wall of the sleeve for limiting, the two telescopic spring posts are fixedly mounted between the two semi-circular rings, the two tension springs are fixedly mounted between the two semi-circular rings, the U-shaped wedge block is inserted into the side wall of the sleeve, one end of the special-shaped telescopic rod is fixedly mounted on the U-shaped wedge block, the sliding plate is located at the bottom of the frame for limiting sliding and is fixedly connected to the special-shaped telescopic rod, the protective disc is fixedly mounted on the top of the sliding plate, and the abutment shaft is fixedly mounted on the adjusting shaft.

[0010] Preferably, a notched ring is fixedly provided on the protective disk, the abutting shaft abuts against the notched ring, the protective disk is movably sleeved with the adjusting shaft, and a return spring is fixedly provided on the side wall of the protective disk.

[0011] Preferably, the linkage mechanism includes a plurality of linkage gears and a linkage rack, the plurality of linkage gears are respectively fixedly mounted on the ends of corresponding adjustment shafts, the linkage rack is limited and slidably mounted on the side wall of the frame, the plurality of adjustment shafts are provided with rough sections, and the two ends of the central column are respectively fixedly connected to the corresponding linkage gears and adjustment shafts.

[0012] Preferably, the switching mechanism includes a handrail, two inclined rods, a first wedge block, a second wedge block, two switching shafts, a multi-segment telescopic rod, two U-shaped rods, and a vertical groove. The two switching shafts rotate the side wall of the frame. The first and second wedge blocks are respectively fixedly mounted on the same switching shaft. The two inclined rods are respectively fixedly mounted on the two switching shafts. The multi-segment telescopic rods are slidably sleeved on the corresponding adjusting shafts. The handrail is fixedly mounted on the two switching shafts. An elastic support plate is fixedly mounted on the frame. One end of each of the two U-shaped rods is fixedly mounted on the multi-segment telescopic rod. The vertical groove is mounted on a rack. The other end of the U-shaped rod is slidably engaged with the vertical groove.

[0013] Compared with the prior art, the beneficial effects of the present invention are: This invention, through the arrangement of a protective plate, abutment shaft, sliding plate, irregularly shaped telescopic rod, U-shaped wedge block, snap-fit ​​plate, two semi-circular rings, two tension springs, two telescopic spring columns, and sleeve, achieves the following: when the road surface inclination angle is greater than 30 degrees, the distance between the rotating plate and the fixed plate is automatically reduced, and the rotating plate and the fixed plate clamp the bottle between them, preventing the bottle from slipping and ensuring that the liquid inside the bottle does not spill. At the same time, the linkage mechanism reduces the height of the shelf and increases the base area, lowering the center of gravity, making it easier for transport personnel to push, and preventing the entire shelf from tipping over due to an excessively high center of gravity during transport, thus ensuring the safety of transport. This invention achieves automatic synchronous adjustment of the balance angle of all rotating plates by setting up linkage gears and linkage racks, thus ensuring the balance of the sample bottles on the rotating plates; This invention, through the arrangement of handrails, two diagonal bars, a first wedge block, a second wedge block, two switching shafts, multi-segment telescopic rods, two U-shaped rods, and vertical grooves, enables the rotating plate to adaptively adjust its angle synchronously according to the terrain's tilt angle when the pull rod is extended for transport. When the pull rod is retracted, the rack is in use mode, and the angle of the rotating plate is automatically locked. Combined with the clamping of the fixed plate, the rotating plate achieves double-limit fixation, ensuring the stability of the rack. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the linkage mechanism structure of the present invention; Figure 3 This is a partial cross-sectional structural schematic diagram of the present invention; Figure 4 This is a schematic diagram showing the positional relationship between the linkage mechanism and the balancing structure of the present invention; Figure 5 for Figure 4 Enlarged view of point A in the middle; Figure 6 This is a schematic diagram showing the positional relationship between the linkage mechanism and the switching mechanism of the present invention; Figure 7 This is a schematic diagram showing the positional relationship between the protection mechanism and the linkage mechanism of the present invention; Figure 8 This is a schematic diagram showing the positional relationship between the adjustment mechanism and the protection mechanism of the present invention; Figure 9 for Figure 8 Enlarged view at point B in the middle; Figure 10 This is a schematic diagram of the internal cross-section of the balancing mechanism of the present invention.

[0015] In the diagram: 1. Caster wheel; 2. Frame; 3. Linkage mechanism; 31. First shaft; 32. Second shaft; 33. First link; 34. Slider; 35. Second link; 4. Adjustment mechanism; 41. Adjustment shaft; 42. Adjustment groove; 43. Adjustment plate; 44. Cylinder; 5. Fixing plate; 6. Protection mechanism; 61. Protective disc; 62. Abutment shaft; 63. Slide plate; 64. Irregular telescopic rod; 65. U-shaped wedge block; 66. Clip plate; 67. Semicircular ring; 68. Tension spring; 69. Telescopic spring 610. Column; 611. Sleeve; 612. Return spring; 7. Switching mechanism; 71. Handrail; 72. Diagonal bar; 73. First wedge block; 74. Second wedge block; 75. Switching shaft; 76. Multi-segment telescopic rod; 77. U-shaped rod; 78. Vertical groove; 8. Rotating plate; 9. Balancing mechanism; 91. Float plate; 92. Central shaft; 93. Water wheel; 94. First gear; 95. Second gear; 96. Gear ring; 97. Central column; 10. Rough section; 101. Linkage gear; 102. Linkage rack. Detailed Implementation

[0016] 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.

[0017] Please see Figure 1-10An embodiment of the present invention provides a telescopic storage rack, comprising a frame body 2, four universal wheels 1 fixedly mounted at the bottom of the frame body 2, two linkage mechanisms 3 mounted on the side wall of the frame body 2, a plurality of fixed plates 5 and a plurality of rotating plates 8 rotatably mounted between the two linkage mechanisms 3, an adjustment mechanism 4 mounted on the side wall of the rotating plate 8, a balancing mechanism 9 fixedly mounted on the side wall of the frame body 2, a linkage mechanism mounted on the side wall of the balancing mechanism 9, a switching mechanism 7 rotatably mounted on the side wall of the frame body 2, and a protection mechanism 6 mounted on the side wall of the frame body 2. Before use, the adjusting mechanism 4 drives the linkage mechanism 3 to work. The linkage mechanism 3 drives the rotating plate 8 and the fixed plate 5 to move upward synchronously, thereby adjusting the distance. The linkage mechanism 3 drives the fixed plate 5 to clamp the rotating plate 8. During normal use, the caster 1 is locked, and the rotating plate 8 is locked by the switching mechanism 7. When it is necessary to transport, the switching mechanism 7 is pressed down to drive the linkage mechanism to unlock the rotating plate 8 and push the switching mechanism 7 to transfer. When encountering an inclined ground, the balancing mechanism 9 reverses to drive the linkage mechanism to work. The linkage mechanism drives the rotating plate 8 to rotate synchronously, so that the bottles on the rotating plate 8 remain balanced during the transfer. When the inclination angle of the road surface is greater than 30 degrees, the balancing mechanism 9 triggers the protection mechanism 6 to start, so that the adjusting mechanism 4 is reset under the action of gravity, thereby gradually reducing the distance between the rotating plate 8 and the fixed plate 5 until the rotating plate 8 and the fixed plate 5 clamp the sample bottle. It is worth mentioning that the fixed plate 5 is elastically telescopic, which reduces the height of the frame 2 and increases the area of ​​the fixed plate 5, thereby lowering the center of gravity and ensuring its stability while clamping the sample bottle to prevent the sample bottle from slipping.

[0018] Specifically, both linkage mechanisms 3 include several first shafts 31, several second shafts 32, several first connecting rods 33, several sliders 34, and several second connecting rods 35. The first shafts 31 are fixedly mounted on the side walls of their respective fixed plates 5. The first connecting rods 33 and 35 are rotatably mounted on their respective first shafts 31 at their ends. The second shafts 32 are rotatably mounted at the overlap of the first connecting rods 33 and 35. The sliders 34 are fixedly mounted at the ends of the second shafts 32 and are in a limited sliding fit with the side walls of the frame 2. When no transfer is required, the distance between the rotating plate 8 and the fixed plate 5 is increased, causing the first connecting rods 33 and 35 to rotate around the second shaft 32. The first connecting rods 33 and 35 then cause the fixed plate 5 to clamp the rotating plate 8, thus fixing and holding the rotating plate 8 in place; this achieves initial fixation of the rotating plate 8 during use of the shelf.

[0019] Specifically, the adjustment mechanism 4 includes several adjustment shafts 41, several adjustment slots 42, an adjustment plate 43, and a cylinder 44. The cylinder 44 is fixedly mounted on the side wall of the frame 2, the adjustment plate 43 is fixedly mounted on the end of the output shaft of the cylinder 44, the several adjustment slots 42 are arranged on the adjustment plate 43, and the inclination angle of the several adjustment slots 42 increases sequentially. The several adjustment shafts 41 are respectively fixedly mounted on the side wall of the corresponding rotating plate 8, and the several adjustment shafts 41 slide within the corresponding adjustment slots 42. In use, the output shaft of the cylinder 44 extends to drive the adjustment plate 43 to move, and simultaneously drives the adjustment shafts 41 to slide within the adjustment slots 42. The adjustment shafts 41 drive the distance between the rotating plate 8 and the fixed plate 5 to increase synchronously. This enables rapid installation of the shelf and allows for adjustment of the height of each shelf layer according to needs and the height of the bottles being carried. It is highly adaptable, quick to install, simple to operate, and convenient.

[0020] Specifically, the balancing mechanism 9 includes a float 91, a central shaft 92, a water wheel 93, a first gear 94, a second gear 95, a gear ring 96, and a central column 97. The water wheel 93 is fixedly mounted on the side wall of the frame 2. The central shaft 92 is rotatably mounted at the center of the water wheel 93. The float 91 is fixedly mounted on the central shaft 92. The first gear 94 is rotatably mounted inside the central column 97. The central column 97 is rotatably mounted through the center of the central shaft 92. The second gear 95 is fixedly mounted on the central column 97. The gear ring 96 is fixedly mounted on the inner wall of the central shaft 92. The second gear 95 meshes with the gear ring 96 and the first gear 94 respectively. The water wheel 93 is filled with water at half its volume. The water in the waterwheel 93 drives the float 91 and the central shaft 92 to rotate. The gear ring 96 of the central shaft 92 rotates, which in turn drives the first gear 94 to rotate. The first gear 94 drives the second gear 95 and the central column 97 to rotate. The central column 97 drives the corresponding adjusting shaft 41 and the linkage mechanism to rotate. The adjusting shaft 41 drives the rotating plate 8 to rotate. This achieves adaptive adjustment of the angle of the rotating plate 8 according to the terrain, ensuring that even if there is liquid in the sample bottle on the rotating plate 8 during the transfer process, it can still maintain its stability and prevent it from tipping over or spilling. No manual supervision is required, the degree of automation is high, the range of adaptability is wide, and the quality of transfer is guaranteed.

[0021] Specifically, the protection mechanism 6 includes a protection disc 61, an abutment shaft 62, a sliding plate 63, a special-shaped telescopic rod 64, a U-shaped wedge block 65, a locking disc 66, two semi-circular rings 67, two tension springs 68, two telescopic spring pillars 69, and a sleeve 610. The locking disc 66 is fixedly installed at the end of the cylinder 44. The sleeve 610 is fixedly installed on the side wall of the adjusting plate 43. The two semi-circular rings 67 are limited and inserted into the inner wall of the sleeve 610. The two telescopic spring pillars 69 are fixedly installed between the two semi-circular rings 67. The two tension springs 68 are fixedly installed between the two semi-circular rings 67. The U-shaped wedge block 65 is inserted into the side wall of the sleeve 610. One end of the special-shaped telescopic rod 64 is fixedly installed on the U-shaped wedge block 65. The sliding plate 63 is located at the bottom of the frame 2 and is limited and slidable, and the sliding plate 63 is fixedly connected to the special-shaped telescopic rod 64. The protection disc 61 is fixedly installed on the top of the sliding plate 63. The abutment shaft 62 is fixedly installed on the adjusting shaft 41.

[0022] Specifically, a notched ring is fixedly provided on the protective disc 61, the abutting shaft 62 abuts against the notched ring, the protective disc 61 is movably sleeved with the adjusting shaft 41, and a return spring 611 is fixedly provided on the side wall of the protective disc 61. When the floating plate 91 rotates at an angle greater than 30 degrees, the rotating plate 8 drives the adjusting shaft 41 to rotate synchronously, the adjusting shaft 41 drives the abutting shaft 62 to rotate, and the abutting shaft 62 abuts against the notched ring on the protective disc 61, causing the protective disc 61 to move towards the sliding plate. The movement of the protective disc 61 drives the sliding plate 63 to move, and the sliding plate 63 drives the irregular telescopic rod 64 and the U-shaped wedge block to move. The U-shaped wedge block 65 abuts against the semi-circular ring 67 and separates, allowing the locking disc 66 to pass between the two semi-circular rings 67, thereby causing the adjusting shaft 41 to move downward under the action of gravity and abut against the sliding plate. The moving plate and sleeve 610 move toward the cylinder 44, thereby gradually reducing the gap between the rotating plates 8. When the road surface tilt angle is greater than 30 degrees, the gap between the rotating plate 8 and the fixed plate 5 is automatically reduced. The rotating plate 8 and the fixed plate 5 clamp the bottle between them, preventing the bottle from slipping and ensuring that the liquid inside the bottle does not spill. At the same time, the linkage mechanism 3 reduces the height of the shelf and increases the bottom area, lowering the center of gravity and making it easier for the transfer personnel to push. This prevents the entire shelf from tipping over due to an excessively high center of gravity during transfer, ensuring the safety of the transfer.

[0023] Specifically, the linkage mechanism includes several linkage gears 101 and linkage racks 102. The linkage gears 101 are fixedly mounted at the ends of corresponding adjustment shafts 41. The linkage racks 102 are slidably mounted on the side wall of the frame 2. The adjustment shafts 41 are provided with rough sections 10. The two ends of the central column 97 are fixedly connected to the corresponding linkage gears 101 and adjustment shafts 41. Rotation of the central column 97 drives the bottom linkage gear 101 to rotate, which in turn drives the linkage rack 102 to move. The movement of the linkage rack 102 drives the remaining linkage gears 101 to rotate, and the linkage gears 101 drive the adjustment shafts 41 and the rotating plates 8 to rotate synchronously. This achieves automatic synchronous adjustment of the balance angle of all rotating plates 8, ensuring the balance of the sample bottles on the rotating plates 8.

[0024] Specifically, the switching mechanism 7 includes a handrail 71, two inclined rods 72, a first wedge block 73, a second wedge block 74, two switching shafts 75, a multi-segment telescopic rod 76, two U-shaped rods 77, and a vertical groove 78. The two switching shafts 75 rotate the side wall of the frame 2. The first wedge block 73 and the second wedge block 74 are respectively fixedly mounted on the same switching shaft 75. The two inclined rods 72 are respectively fixedly mounted on the two switching shafts 75. The multi-segment telescopic rods 76 are slidably sleeved on the corresponding adjusting shafts 41. The handrail 71 is fixedly mounted on the two switching shafts 75. An elastic support plate is fixedly mounted on the frame 2. One end of each of the two U-shaped rods 77 is fixedly mounted on the multi-segment telescopic rod 76. The vertical groove 78 is mounted on a rack. The other end of each U-shaped rod 77 is slidably engaged with the vertical groove 78. By pulling out the handrail 71, the inclined rod 72 rotates around the switching shaft 75. The rotation of the switching shaft 75 causes the first wedge block 73 and the second wedge block 74 to rotate synchronously. The second wedge block 74 moves towards the first wedge block 73 by contacting the multi-segment telescopic rod 76. The multi-segment telescopic rod 76 moves the U-shaped rod 77. The movement of the U-shaped rod 77 moves the linkage rack 102, so that the linkage rack 102 meshes with the linkage gear 101. This causes the multi-segment telescopic rod 76 to contact the rough section 10 and frictionally limit the adjustment rod. This achieves adaptive adjustment of the rotating plate 8 according to the terrain tilt angle when the handrail is pulled out for transport. When the handrail is retracted, the rack is in use state and the angle of the rotating plate 8 is automatically locked. With the clamping of the rotating plate 8 by the fixing plate 5, double limit fixation is achieved to ensure the stability of the rack.

[0025] 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 telescopic storage rack, comprising a frame body, wherein four casters are fixedly mounted on the bottom of the frame body, characterized in that: The frame sidewall is provided with two linkage mechanisms, and several fixed plates and several rotating plates are rotatably arranged between the two linkage mechanisms. The rotating plate sidewall is provided with an adjustment mechanism. The frame sidewall is fixedly provided with a balancing mechanism. The balancing mechanism sidewall is provided with a linkage mechanism. The frame sidewall is rotatably provided with a switching mechanism. The frame sidewall is provided with a protection mechanism.

2. The telescopic storage rack according to claim 1, characterized in that: Both linkage mechanisms include a plurality of first shafts, a plurality of second shafts, a plurality of first connecting rods, a plurality of sliders, and a plurality of second connecting rods. The plurality of first shafts are respectively fixedly mounted on the side wall of the corresponding fixed plate. The two ends of the plurality of first connecting rods and second connecting rods are respectively offset and rotatably mounted on the corresponding first shafts. The plurality of second shafts are rotatably mounted at the overlapping part of the first connecting rods and second connecting rods. The sliders are fixedly mounted at the end of the second shafts and are limited and slidably engaged with the side wall of the frame.

3. A telescopic storage rack according to claim 1, characterized in that: The adjustment mechanism includes several adjustment shafts, several adjustment slots, an adjustment plate, and a cylinder. The cylinder is fixedly mounted on the side wall of the frame, the adjustment plate is fixedly mounted on the end of the cylinder output shaft, the several adjustment slots are mounted on the adjustment plate, the inclination angles of the several adjustment slots increase sequentially, the several adjustment shafts are respectively fixedly mounted on the side wall of the corresponding rotating plate, and the several adjustment shafts slide within the corresponding adjustment slots.

4. A telescopic storage rack according to claim 3, characterized in that: The balancing mechanism includes a float, a central shaft, a water wheel, a first gear, a second gear, a gear ring, and a central column. The water wheel is fixedly mounted on the side wall of the frame. The central shaft is rotatably mounted at the center of the water wheel. The float is fixedly mounted on the central shaft. The first gear is rotatably mounted inside the central column. The central column is rotatably mounted through the center of the central shaft. The second gear is fixedly mounted on the central column. The gear ring is fixedly mounted on the inner wall of the central shaft. The second gear meshes with both the gear ring and the first gear. The water wheel is filled with water at half its capacity.

5. A telescopic storage rack according to claim 2, characterized in that: The protective mechanism includes a protective disc, an abutment shaft, a sliding plate, a special-shaped telescopic rod, a U-shaped wedge block, a locking disc, two semi-circular rings, two tension springs, two telescopic spring posts, and a sleeve. The locking disc is fixedly mounted on the end of the cylinder, the sleeve is fixedly mounted on the side wall of the adjusting plate, the two semi-circular rings are inserted into the inner wall of the sleeve for limiting, the two telescopic spring posts are fixedly mounted between the two semi-circular rings, the two tension springs are fixedly mounted between the two semi-circular rings, the U-shaped wedge block is inserted into the side wall of the sleeve, one end of the special-shaped telescopic rod is fixedly mounted on the U-shaped wedge block, the sliding plate is located at the bottom of the frame for limiting sliding and is fixedly connected to the special-shaped telescopic rod, the protective disc is fixedly mounted on the top of the sliding plate, and the abutment shaft is fixedly mounted on the adjusting shaft.

6. A telescopic storage rack according to claim 5, characterized in that: A notched ring is fixedly provided on the protective disk, the abutting shaft abuts against the notched ring, the protective disk is movably sleeved with the adjusting shaft, and a return spring is fixedly provided on the side wall of the protective disk.

7. A telescopic storage rack according to claim 1, characterized in that: The linkage mechanism includes several linkage gears and linkage racks. The linkage gears are respectively fixedly mounted at the ends of the corresponding adjustment shafts. The linkage racks are limited and slidably mounted on the side wall of the frame. The adjustment shafts are provided with rough sections. The two ends of the central column are respectively fixedly connected to the corresponding linkage gears and adjustment shafts.

8. A telescopic storage rack according to claim 1, characterized in that: The switching mechanism includes a handrail, two inclined rods, a first wedge block, a second wedge block, two switching shafts, a multi-segment telescopic rod, two U-shaped rods, and a vertical groove. The two switching shafts rotate the side wall of the frame. The first and second wedge blocks are respectively fixedly mounted on the same switching shaft. The two inclined rods are respectively fixedly mounted on the two switching shafts. The multi-segment telescopic rods are slidably sleeved on the corresponding adjusting shafts. The handrail is fixedly mounted on the two switching shafts. An elastic support plate is fixedly mounted on the frame. One end of each of the two U-shaped rods is fixedly mounted on the multi-segment telescopic rod. The vertical groove is mounted on a rack, and the other end of the U-shaped rod slides into the vertical groove.

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