A movable shelf with a self-locking structure

Abstract

This invention relates to the field of automated shelving technology, specifically to a movable shelving system with a self-locking structure. The system includes a shelving body, and a self-locking mechanism, a pushing mechanism, and a snap-locking mechanism fixedly installed on the shelving body. The pushing mechanism includes a pushing shaft capable of linear movement. The pushing shafts on every two movable shelving units are fixedly connected via the snap-locking mechanism. This movable shelving system with a self-locking structure can be installed and used simply by laying floor rails on the ground. Each shelving unit has an interlocking structure, enabling flexible and convenient installation and assembly. Users can freely set and stack the number of shelving units according to actual storage needs, offering strong scalability. Furthermore, the manufacturing cost of this shelving system is relatively low, and daily maintenance and upkeep costs are also economical. If a shelving unit malfunctions, it can be quickly disassembled and replaced immediately, effectively reducing downtime and improving system reliability and maintainability.

Description

Technical Field

[0001] This invention relates to the field of automated shelving storage technology, and more specifically to a movable shelving unit with a self-locking structure. Background Technology

[0002] When managing warehouse inventory in a factory area, a multi-rack array arrangement is often used. When goods need to be retrieved, indicator lights on the racks flash, and workers then retrieve the goods from the corresponding location according to the instructions. Nowadays, some automated warehouses also use robots to automatically retrieve goods, and this type of automated storage and retrieval system is widely used in various factory areas.

[0003] However, regardless of the picking method used, the shelving must have sufficient space along its length for personnel or robots to move around. In warehouses consisting of multiple shelving units, this lack of walking space results in the shelving occupying a significant amount of factory space.

[0004] To save space, existing technology places multiple shelves side-by-side along their width and positions them on tracks, while a retrieval device is installed between the tracks to move the shelves. However, before moving the shelves, the self-locking mechanism on each shelf needs to be unlocked to ensure smooth movement. If any self-locking mechanism fails to unlock, the retrieval device cannot move the required number of shelves, resulting in resistance between them. Since the retrieval device requires significant pushing force to move the shelves, this creates substantial resistance between the device and the shelves, potentially damaging both.

[0005] Furthermore, in existing technologies, installing retrieval equipment requires slotting and embedding it between two tracks, resulting in high manufacturing costs. Moreover, the flexibility of assembling multiple shelves is poor, and subsequent maintenance costs are also high.

[0006] Therefore, it is necessary to design a movable rack with a self-locking structure to avoid damage to the equipment when the rack is moved due to the self-locking structure. The rack should also be flexible in installation and assembly, and have low manufacturing and maintenance costs. Summary of the Invention

[0007] In view of the above-mentioned technical deficiencies, the purpose of this invention is to provide a movable shelf with a self-locking structure, which can avoid damage to the equipment caused by the self-locking structure when the shelf is moved. Moreover, the shelf can be flexibly installed and assembled, and the manufacturing and maintenance costs are low.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: The present invention provides a movable shelf with a self-locking structure, including a shelf body, and a self-locking mechanism, a pushing mechanism, and a snap-locking unlocking mechanism fixedly installed on the shelf body. The pushing mechanism includes a pushing shaft capable of linear pushing. The pushing shafts on every two movable shelves are fixedly connected through the snap-locking unlocking mechanism. The self-locking mechanism is fixedly installed on the shelf body, and the self-locking mechanism is provided with a vertically movable abutment post. The abutment post is drivenly connected to the horizontally moving pushing shaft. The pushing shaft contacts another shelf body, and multiple abutment posts are snapped together through the snap-locking unlocking mechanism. Multiple self-locking mechanisms are drivenly connected to the abutment posts through the snap-locking unlocking mechanism. When the snap-locking unlocking mechanism is unlocked, two adjacent abutment posts are unlocked, and two pushing shafts are unlocked. When the pushing shaft is pushed horizontally, the pushing shaft will push the abutment post upward and push another shelf body to move horizontally.

[0009] Preferably, one end of the push shaft is provided with a first insertion hole, and the other end of the push shaft is provided with a retaining ring. The retaining ring has a second insertion hole. The end of the retaining ring contacts the shelf body on another movable shelf. When the two adjacent push shafts are engaged with each other, the first insertion hole and the second insertion hole are aligned. The engagement unlocking mechanism is provided with a rod that can be inserted between the first insertion hole and the second insertion hole.

[0010] Preferably, the latching unlocking mechanism further includes a fixed insert, a movable insert, a support base, and a horizontal sliding mechanism. The insert is fixedly installed on the horizontal sliding mechanism, and a stop post is fixedly provided on the self-locking mechanism. The fixed insert is inserted into the stop post of the main body, and the movable insert is inserted into the stop post of another movable shelf. The movable insert is horizontally slidably connected to the support base, and the support base is vertically slidably installed on the horizontal sliding mechanism.

[0011] Preferably, the horizontal pushing mechanism includes an upper guide column, a lower guide column, and an electric push rod. The upper guide column is slidably connected to the support seat through a slide rail and a slide block assembly. The push rod is fixedly installed at the end of the lower guide column. The upper and lower guide columns are horizontally slidably installed on the rack body through the guide block. The output end of the electric push rod is fixedly connected to the upper and lower guide columns.

[0012] Preferably, the self-locking mechanism includes a spring, a connecting plate, and a retaining ring. The second guide seat is fixedly installed on the shelf body. The second guide seat is fixedly installed on the shelf body. The abutment post is vertically slidably installed on the second guide seat. The connecting plate is fixedly installed on the top of the abutment post. The retaining ring is installed in the middle of the outer edge of the abutment post. The spring is used to apply a downward elastic force to the retaining ring.

[0013] Preferably, a push rod is fixedly installed on the push shaft, and a connecting rod is fixedly installed at the bottom of the connecting plate. A descending notch is opened on the connecting rod. When the push shaft is not pushed, the push rod is inserted into the descending notch. An inclined surface connects the descending notch and the bottom of the connecting rod.

[0014] Preferably, the pushing mechanism includes an electric push rod II, a bent rod, and a locking rod. The electric push rod II is fixedly installed on the shelf body, the locking rod is fixedly installed on the pushing shaft, the bent rod is fixedly connected to the output end of the electric push rod II, and the bent rod has a locking groove for the locking rod to be engaged.

[0015] Preferably, a guide tube is fixedly installed on the shelf body, and the push shaft is slidably installed on the guide tube. The two sides of the retaining ring are in contact with the guide tubes on the two movable shelves respectively.

[0016] Preferably, the locking and unlocking mechanism includes a sliding post, one side of which is slidably connected to the sliding post via a slider, and a strip groove is provided on the support base for the sliding of the movable post.

[0017] Preferably, a strong magnetic strip that attracts the support is fixedly installed on the sliding column.

[0018] The beneficial effects of this invention are as follows: This movable rack with a self-locking structure can be installed and used simply by laying floor rails on the ground. Each rack has its own interlocking structure, enabling flexible and convenient installation and assembly. Users can freely set and stack the number of racks according to actual storage needs, offering strong scalability. Furthermore, the manufacturing cost of this rack system is relatively low, and daily maintenance and upkeep costs are also economical. If a rack malfunctions, it can be quickly disassembled and replaced immediately, effectively reducing downtime and improving system reliability and maintainability, thus enabling the widespread adoption of automated storage and retrieval systems (AS / RS). Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is the front view of the present invention.

[0021] Figure 2 This is a side view of the present invention.

[0022] Figure 3 This is a partial three-dimensional structural diagram of the present invention.

[0023] Figure 4 This is a partial top view of the shelf before it was moved.

[0024] Figure 5 This is a partial top view after the shelf has been moved.

[0025] Figure 6 This is a front view of the two separate push-axis structure.

[0026] Figure 7 The main view of the card-unlocking mechanism in its installed state.

[0027] Figure 8 This is a three-dimensional structural diagram of the pushing mechanism.

[0028] Figure 9 This is a three-dimensional structural diagram of the self-locking mechanism.

[0029] Figure 10 This is a three-dimensional structural diagram of the card-locking mechanism.

[0030] Figure 11 This is a three-dimensional structural diagram of the clasp in contact with the catheter.

[0031] Figure 12 This is a partial three-dimensional structural diagram of the latch unlocking mechanism.

[0032] Figure 13 This is a schematic diagram of the three-dimensional structure in the slider-separated state.

[0033] Explanation of reference numerals in the attached drawings: 1. Shelf body; 1a. Wheel; 2. Ground rail; 3. Self-locking mechanism; 3a. Abutment post; 3b. Sleeve; 3c. Guide seat two; 3d. Spring; 3e. Connecting plate; 3h. Retaining ring; 3j. Connecting rod; 3j1. Lowering notch; 4. Pushing mechanism; 4a. Pushing shaft; 4a1. Insertion hole one; 4a2. Snap ring; 4a3. Insertion hole two; 4a4. Push rod; 4b. Electric push rod two; 4c. Bent rod; 4c1. Slot; 4d. Locking rod; 4e. Guide tube; 5. Snap-on unlocking mechanism; 5a. Insertion rod; 5b. Fixed insertion post; 5c. Movable insertion post; 5d. Support seat; 5e. Horizontal pushing mechanism; 5e1. Upper guide post; 5e2. Lower guide post; 5e3. Electric push rod one; 5e4. Guide seat one; 5f. Sliding column; 5h. Sliding block; 5j. Strong magnetic strip. Detailed Implementation

[0034] 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.

[0035] Example: This invention provides a movable shelf with a self-locking structure, such as... Figure 1-13As shown, multiple movable shelves can be spliced ​​together to form a shelf assembly. These shelves are slidably mounted on a ground rail 2 via wheels 1a. The assembly includes a shelf body 1, and a self-locking mechanism 3, a pushing mechanism 4, and a locking / unlocking mechanism 5 fixedly mounted on the shelf body 1. The pushing mechanism 4 includes a pushing shaft 4a capable of linear movement. The pushing shafts 4a on every two movable shelves are fixedly connected via the locking / unlocking mechanism 5. The self-locking mechanism 3 is fixedly mounted on the shelf body 1 and is equipped with a vertically movable... The abutment post 3a is drivenly connected to the horizontally moving push shaft 4a. The push shaft 4a contacts another shelf body 1, and multiple abutment posts 3a are engaged with each other through a locking and unlocking mechanism 5. Multiple self-locking mechanisms 3 are drivenly connected to the abutment posts 3a through the locking and unlocking mechanism 5. When the locking and unlocking mechanism 5 unlocks, two adjacent abutment posts 3a unlock, and two push shafts 4a unlock. When the push shaft 4a is pushed horizontally, it will push the abutment posts 3a upwards and push the other shelf body 1 to move horizontally. When it is necessary to retrieve an item from the shelf body 1, from... Figure 5 Let's look at shelf number 2. First, the latching unlocking mechanism 5 installed on shelf number 2 unlocks the shelf, then the pushing mechanism 4 pushes it forward. The pushing mechanism 4 drives the pushing shaft 4a to move linearly, which in turn pushes shelf number 3 to move linearly.

[0036] Furthermore, during the pushing process of the push shaft 4a, it also unlocks the self-locking mechanism 3 on shelf 2. Simultaneously, since the self-locking mechanisms 3 on shelves 2 and 3 are interconnected via the locking unlocking mechanism 5 on shelf 3, when the locking unlocking mechanism 5 on shelf 2 disengages, the transmission of the self-locking mechanisms 3 on shelves 1 and 2 is disengaged. When the self-locking mechanism 3 on shelf 2 unlocks, it simultaneously unlocks the self-locking mechanism 3 on shelf 3, and all the self-locking mechanisms 3 on the left side of shelf 3 also unlock simultaneously. The main unlocking process involves the contact post 3a lifting upwards, eliminating contact friction between the bottom of the contact post 3a and the ground.

[0037] The above unlocking process avoids the situation where the shelf body 1 cannot be moved due to the self-locking mechanism 3. This is because multiple self-locking mechanisms 3 will unlock simultaneously through mutual connection, and the self-locking mechanism 3 originally on the shelf body 1 will also automatically unlock through the push of the push shaft 4a, further preventing the situation where it cannot be unlocked.

[0038] Furthermore, this mobile shelving system only requires a ground track 2, and multiple shelves have a self-interlocking structure, allowing for flexible installation and assembly. The number of stacked shelves can be set as needed. At the same time, the manufacturing and maintenance costs of the shelving are low, and faulty shelves can be quickly replaced in case of malfunction.

[0039] The pulling direction of the locking and unlocking mechanism 5 is S1, while the pushing direction of the pushing mechanism 4 is S2.

[0040] Moreover, even after the shelf is disassembled, moving it on the ground and controlling the movement of the pushing mechanism 4 can still drive the self-locking mechanism 3 to lock and unlock.

[0041] One end of the push shaft 4a is provided with a first insertion hole 4a1, and the other end of the push shaft 4a is provided with a retaining ring 4a2. The retaining ring 4a2 has a second insertion hole 4a3. The end of the retaining ring 4a2 contacts the shelf body 1 on another movable shelf. When the two adjacent push shafts 4a are engaged with each other, the first insertion hole 4a1 and the second insertion hole 4a3 are aligned. The engagement unlocking mechanism 5 is provided with a plug rod 5a that can be inserted between the first insertion hole 4a1 and the second insertion hole 4a3. When the engagement unlocking mechanism 5 is pulled to unlock, the plug rod 5a will be pulled out from between the second insertion hole 4a3 and the first insertion hole 4a1, thereby unlocking the two push shafts 4a from each other, so that the push shafts 4a can be pushed linearly to move other shelves.

[0042] The latching unlocking mechanism 5 also includes a fixed insert 5b, a movable insert 5c, a support base 5d, and a horizontal pushing mechanism 5e. The insert rod 5a is fixedly mounted on the horizontal pushing mechanism 5e. A stop post 3a is fixedly mounted on the self-locking mechanism 3. The fixed insert 5b is inserted into the stop post 3a of the main body, and the movable insert 5c is inserted into the stop post 3a of another movable shelf. The movable insert 5c is horizontally slidably connected to the support base 5d, which is vertically slidably mounted on the horizontal pushing mechanism 5e. When the latching unlocking mechanism 5 on shelf position 3 is activated, the latch sleeve 3b on shelf position 3 will cause the fixed insert 5b to move horizontally. Since shelf position 2 cannot move, its latch sleeve 3b also cannot move. The latch sleeve 3b and the movable insert 5c are in a friction fit, which will cause the movable insert 5c to slide along the length of the support base 5d.

[0043] When the abutment post 3a moves upward, it will cause the retaining sleeve 3b to move upward. The movable insert post 5c and the fixed insert post 5b are connected by the support base 5d. When the retaining sleeve 3b of shelf position 2 moves upward, it will simultaneously cause the retaining sleeve 3b of shelf position 3 to move upward. And so on, for all shelves connected to shelf position 3, their retaining sleeves 3b will be pushed upward, meaning that all the abutment posts 3a that were originally in contact with the ground will be lifted upward.

[0044] The horizontal pushing mechanism 5e includes an upper guide column 5e1, a lower guide column 5e2, and an electric push rod 5e3. The upper guide column 5e1 is slidably connected to the support base 5d via a slide rail and slide block assembly. The insertion rod 5a is fixedly installed at the end of the lower guide column 5e2. The upper guide column 5e1 and the lower guide column 5e2 are horizontally slidably mounted on the rack body 1 via the guide block. The output end of the electric push rod 5e3 is fixedly connected to the upper guide column 5e1 and the lower guide column 5e2. When the output end of the electric push rod 5e3 starts to move, it can push the upper guide column 5e1 and the lower guide column 5e2 to slide along the guide block 5e4. When pushed forward, the insertion rod 5a will be inserted between the two pushing shafts 4a, and the movable insertion rod 5c and the fixed insertion rod 5b will be inserted into the retaining sleeve 3b. Conversely, when pulled backward, the insertion rod 5a and the fixed insertion rod 5b will be pulled out of the retaining sleeve 3b.

[0045] like Figure 9 As shown, the self-locking mechanism 3 includes a spring 3d, a connecting plate 3e, and a retaining ring 3h. A guide seat 3c is fixedly installed on the shelf body 1. An abutment post 3a is vertically slidably mounted on the guide seat 3c. The connecting plate 3e is fixedly installed on the top of the abutment post 3a. The retaining ring 3h is installed in the middle of the outer edge of the abutment post 3a. The spring 3d applies a downward elastic force to the retaining ring 3h. The spring 3d is sleeved on the outer edge of the abutment post 3a, and by applying a downward pushing force to the abutment post 3a, the bottom of the abutment post 3a contacts and rubs against the ground, thus achieving self-locking. The bottom of the abutment post 3a is provided with a rubber anti-slip pad. When the retaining sleeve 3b is pulled upwards, the connecting plate 3e is also pulled upwards.

[0046] A push rod 4a4 is fixedly mounted on the push shaft 4a, and a connecting rod 3j is fixedly mounted on the bottom of the connecting plate 3e. A descending notch 3j1 is provided on the connecting rod 3j. When the push shaft 4a is not pushed, the push rod 4a4 is engaged in the descending notch 3j1. An inclined surface connects the descending notch 3j1 and the bottom of the connecting rod 3j. When the push rod 4a4 is engaged in the descending notch 3j1, the bottom of the abutment column 3a contacts the ground. When the push rod 4a4 is horizontally pushed by the moving bent rod 4c, it pushes the connecting rod 3j upwards through the inclined surface, causing the connecting plate 3e to drive the abutment column 3a to move vertically upwards. That is, when the push shaft 4a pushes another shelf to move, it simultaneously drives the self-locking mechanism 3 to unlock.

[0047] The pushing mechanism 4 includes an electric push rod 4b, a bent rod 4c, and a locking rod 4d. The electric push rod 4b is fixedly installed on the shelf body 1, the locking rod 4d is fixedly installed on the pushing shaft 4a, and the bent rod 4c is fixedly connected to the output end of the electric push rod 4b. The bent rod 4c has a slot 4c1 for the locking rod 4d to be engaged. By operating the electric push rod 4b to push it, the electric push rod 4b will push the bent rod 4c to move horizontally, so that the bent rod 4c can drive the locking rod 4d engaged with it to move horizontally.

[0048] A guide tube 4e is fixedly installed on the shelf body 1. A push shaft 4a is slidably mounted on the guide tube 4e. The two sides of the retaining ring 4a2 respectively contact the guide tube 4e on two movable shelves. When the push shaft 4a is pushed, it pushes the retaining ring 4a2 to move. The retaining ring 4a2 then pushes the other shelf body 1 to move through the guide tube 4e. In other words, the guide tube 4e pushes the other shelf body 1 to move, creating a gap between the two shelf bodies 1 for a robot or worker to enter.

[0049] The latching and unlocking mechanism 5 includes a sliding post 5f. One side of the movable insertion post 5c is slidably connected to the sliding post 5f via a slider 5h. The support base 5d has a strip-shaped groove for the movable insertion post 5c to slide. Through the cooperation between the sliding post 5f and the strip-shaped groove, the movable insertion post 5c can slide smoothly in the horizontal direction. This structural design ensures that the movable insertion post 5c maintains a stable horizontal trajectory during movement, thereby achieving smooth horizontal sliding along a predetermined path.

[0050] A strong magnetic strip 5j is fixedly installed on the sliding column 5f, which engages with the support base 5d. Through the stable attraction of the strong magnetic strip 5j, it is ensured that even if slight shaking or external disturbance occurs after the movable insert 5c is completely pulled out of the sleeve 3b and temporarily disengaged from its fixed position, the movable insert 5c will not experience unexpected lateral displacement or positional deviation, thus effectively preventing installation positioning errors caused by accidental displacement. Simultaneously, the front end connection points of the insert rod 5a and the fixed insert 5b are both carefully designed with chamfered edges. This structure guides and centers the two components during docking, effectively preventing the insert rod from being difficult to insert smoothly into the fixed insert due to slight angular deviations or incomplete alignment during initial installation, thus improving assembly tolerance and operational smoothness.

[0051] When an item needs to be retrieved from shelf number 2, the locking mechanism 5 installed at shelf number 2 is used to unlock it. This operation disconnects the self-locking mechanism 3 and the push shaft 4a between shelf number 1 and shelf number 2. Next, the push mechanism 4 is used to push the push shaft 4a forward, thus displacing shelf number 3. During the forward movement of the push shaft 4a, the connecting plate 3e is moved upward by the linkage of the push rod 4a4 and the connecting rod 3j, which in turn lifts the retaining ring 3h, unlocking the shelf. Simultaneously, not only is shelf number 3 unlocked, but all subsequent shelves connected to it are also unlocked, achieving a synchronized unlocking of the entire shelving system.

[0052] This mobile shelving system is ingeniously designed; installation and use are as simple as laying floor rails. The individual shelves are interconnected, allowing for flexible and convenient installation and assembly. Users can freely set and stack the number of shelves according to their actual storage needs, offering strong scalability. Furthermore, the system has relatively low manufacturing costs and economical daily maintenance and upkeep. If a shelf malfunctions, it can be quickly disassembled and replaced immediately, effectively reducing downtime and improving system reliability and maintainability.

[0053] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A movable shelf with a self-locking structure, characterized in that, The system includes a shelf body (1), a self-locking mechanism (3), a pushing mechanism (4), and a snap-locking unlocking mechanism (5) fixedly installed on the shelf body (1). The pushing mechanism (4) includes a pushing shaft (4a) capable of linear pushing. The pushing shafts (4a) on each pair of movable shelves are fixedly connected by the snap-locking unlocking mechanism (5). The self-locking mechanism (3) is fixedly installed on the shelf body (1), and the self-locking mechanism (3) is provided with a vertically movable abutment post (3a). The abutment post (3a) is driven by the horizontally moving pushing shaft (4a). The push shaft (4a) is connected to another shelf body (1), and multiple abutment columns (3a) are engaged by a locking unlocking mechanism (5). Multiple self-locking mechanisms (3) are connected to the abutment columns (3a) via the locking unlocking mechanism (5). When the locking unlocking mechanism (5) is unlocked, two adjacent abutment columns (3a) are unlocked, and two push shafts (4a) are unlocked. When the push shaft (4a) is pushed horizontally, the push shaft (4a) will push the abutment column (3a) upward and push the other shelf body (1) to move horizontally.

2. A movable shelf with a self-locking structure as described in claim 1, characterized in that, One end of the push shaft (4a) is provided with a first insertion hole (4a1), and the other end of the push shaft (4a) is provided with a retaining ring (4a2). The retaining ring (4a2) is provided with a second insertion hole (4a3). The end of the retaining ring (4a2) contacts the shelf body (1) on another movable shelf. When the two adjacent push shafts (4a) are engaged with each other, the first insertion hole (4a1) and the second insertion hole (4a3) are aligned. The engagement unlocking mechanism (5) is provided with a rod (5a) that can be inserted between the first insertion hole (4a1) and the second insertion hole (4a3).

3. A movable shelf with a self-locking structure as described in claim 2, characterized in that, The latching unlocking mechanism (5) also includes a fixed insert (5b), a movable insert (5c), a support base (5d), and a horizontal pushing mechanism (5e). The insert rod (5a) is fixedly installed on the horizontal pushing mechanism (5e). The self-locking mechanism (3) is fixedly provided with an abutment post (3a). The fixed insert (5b) is inserted into the abutment post (3a) of the main body, and the movable insert (5c) is inserted into the abutment post (3a) of another movable shelf. The movable insert (5c) is horizontally slidably connected to the support base (5d), and the support base (5d) is vertically slidably installed on the horizontal pushing mechanism (5e).

4. A movable shelf with a self-locking structure as described in claim 3, characterized in that, The horizontal pushing mechanism (5e) includes an upper guide column (5e1), a lower guide column (5e2), and an electric push rod (5e3). The upper guide column (5e1) is slidably connected to the support base (5d) through a slide rail and slide block assembly. The plug rod (5a) is fixedly installed at the end of the lower guide column (5e2). The upper guide column (5e1) and the lower guide column (5e2) are horizontally slidably installed on the rack body (1) through the guide block. The output end of the electric push rod (5e3) is fixedly connected to the upper guide column (5e1) and the lower guide column (5e2).

5. A movable shelf with a self-locking structure as described in claim 3, characterized in that, The self-locking mechanism (3) includes a spring (3d), a connecting plate (3e), and a retaining ring (3h). The second guide seat (3c) is fixedly installed on the shelf body (1). The second guide seat (3c) is fixedly installed on the shelf body (1). The abutment post (3a) is vertically slidably installed on the second guide seat (3c). The connecting plate (3e) is fixedly installed on the top of the abutment post (3a). The retaining ring (3h) is installed in the middle of the outer edge of the abutment post (3a). The spring (3d) is used to apply a downward elastic force to the retaining ring (3h).

6. A movable shelf with a self-locking structure as described in claim 5, characterized in that, A push rod (4a4) is fixedly installed on the push shaft (4a), and a connecting rod (3j) is fixedly installed at the bottom of the connecting plate (3e). A descending notch (3j1) is opened on the connecting rod (3j). When the push shaft (4a) is not pushed, the push rod (4a4) is inserted into the descending notch (3j1). An inclined surface connects the descending notch (3j1) and the bottom of the connecting rod (3j).

7. A movable shelf with a self-locking structure as described in claim 6, characterized in that, The pushing mechanism (4) includes an electric push rod (4b), a bent rod (4c), and a locking rod (4d). The electric push rod (4b) is fixedly installed on the rack body (1), the locking rod (4d) is fixedly installed on the pushing shaft (4a), the bent rod (4c) is fixedly connected to the output end of the electric push rod (4b), and the bent rod (4c) has a slot (4c1) for the locking rod (4d) to be inserted.

8. A movable shelf with a self-locking structure as described in claim 2, characterized in that, A guide tube (4e) is fixedly installed on the shelf body (1), and a push shaft (4a) is slidably installed on the guide tube (4e). The two sides of the retaining ring (4a2) are in contact with the guide tube (4e) on the two movable shelves respectively.

9. A movable shelf with a self-locking structure as described in claim 1, characterized in that, The latching unlocking mechanism (5) includes a sliding post (5f), one side of the movable insert (5c) is slidably connected to the sliding post (5f) via a slider (5h), and a strip groove is provided on the support base (5d) for the movable insert (5c) to slide.

10. A movable shelf with a self-locking structure as described in claim 9, characterized in that, A strong magnetic strip (5j) is fixedly installed on the sliding column (5f) and attracts the support base (5d).

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