Medical equipment supporting bracket capable of being manually stored and folded

Abstract

The invention provides a medical equipment supporting bracket capable of being manually stored and folded, and relates to the technical field of medical equipment instruments. The medical equipment supporting bracket capable of being manually stored and folded comprises a base, a telescopic support is arranged on the rear portion of the upper end face of the base, a display device is fixedly connected to the upper end face of the telescopic support, the base comprises two fixed square pipes, and the front end faces of the two fixed square pipes are rotationally connected with rotating square pipes; first hooks are fixedly connected to the front portions of the end faces, away from each other, of the two fixed square pipes, first hasps are arranged on the rear portions of the end faces, away from each other, of the two rotating square pipes, a fixed plate is fixedly connected between the two fixed square pipes, and a plurality of sliding grooves are transversely formed in the front portion of the upper end face of the fixed plate. And the two rotating square pipes are rotated by pushing a moving strip to move backwards, then a hanging rod on a second hasp is hung on a second hook, the two rotating square pipes are limited, and the base is conveniently and rapidly stored.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a manually foldable medical device support bracket. Background Technology

[0002] Medical devices are a general term for instruments, equipment, appliances, materials or other items used directly or indirectly on the human body to prevent, diagnose, treat or alleviate diseases, or improve the structure and function of the human body. For ease of storage, medical auxiliary devices are folded and unfolded by manual operation. Their core function is to provide stable support for medical devices and to significantly reduce their volume when not in use through a folding mechanism, making them easy to store, transport and use.

[0003] Existing manually foldable medical device support brackets still have some problems. Traditional bases are mostly fixed structures or can only be partially folded. After folding, they still occupy a large horizontal area and cannot be quickly stored or unfolded, affecting clinical emergency use. Therefore, those skilled in the art have provided a manually foldable medical device support bracket to solve the problems mentioned in the background art. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a manually foldable medical device support bracket, which solves the problem that traditional bases are mostly fixed structures or can only be partially folded, still occupying a large horizontal area after folding, making it impossible to quickly store or unfold them, thus affecting clinical emergency use.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solution: a manually foldable medical device support bracket, including a base, a retractable bracket provided at the rear of the upper surface of the base, and a display device fixedly connected to the upper surface of the retractable bracket;

[0008] The base includes two fixed square tubes, each with a rotating square tube rotatably connected to its front end. A first hook is fixedly connected to the front of each of the two fixed square tubes at their respective far-away ends. A first buckle is provided at the rear of each of the two rotating square tubes at their respective far-away ends. A fixed plate is fixedly connected between the two fixed square tubes. Multiple sliding grooves are arranged horizontally on the front of the upper surface of the fixed plate. Slider blocks are slidably connected inside each of the multiple sliding grooves. A moving bar is fixedly connected to the front end of each of the multiple sliders. A base is fixedly connected to the lower end of the moving bar. A magnetic base is fixedly connected to the lower end of the fixed plate at the rear end of the base. A guide rod is fixedly connected to the center of the rear end face of the base. The guide rod passes through the front end face of the magnetic base and extends to the rear end of the magnetic base, with a disk fixedly connected to its end. Pulling the moving bar forward causes the multiple sliders to slide forward along the multiple sliding grooves. At this time, the guide rod at the rear end of the base moves forward along the magnetic base, causing the disk to adhere to the rear end face of the magnetic base. The magnetic base magnetically holds the disk in place, allowing the base to unfold.

[0009] Preferably, universal wheels are fixedly connected to the rear of the lower end faces of the two fixed square tubes and the front of the lower end faces of the two rotating square tubes. Wheel frames are fixedly connected to both sides of the lower end face of the moving strip. Wheel hubs are rotatably connected to the lower part of the interior of the two wheel frames. The four universal wheels provide support and transportation, and the two wheel hubs and wheel frames support and move the moving strip.

[0010] Preferably, a second buckle and a second hook are fixedly connected to the front of the two rotating square tubes at their opposite ends. The two rotating square tubes are rotated so that their ends fit together, and then the hanging rod on the second buckle is hung on the second hook to limit the position of the two rotating square tubes.

[0011] Preferably, water inlet valves are fixedly connected to the center of the upper end face of the two fixed square tubes and the center of the upper end face of the two rotating square tubes. Drain valves are fixedly connected to the lower front end of the two fixed square tubes and the lower center of the two rotating square tubes. Water is added to the interior of the two mounting bases and the interior of the two triangular support plates through the four water inlet valves. Water is a viscous fluid with internal friction between molecules. When the equipment is vibrated, the internal water will flow. The relative movement between the liquid layers generates viscous resistance, which converts the kinetic energy of the vibration into heat energy, thereby attenuating the vibration. In addition, water can lower the center of gravity of the equipment and improve the stability of the equipment. After use, the water is drained through the drain valves.

[0012] Preferably, the retractable bracket includes two mounting bases. Each mounting base has a first slide rail at its rearmost end face, and a first sliding seat is slidably connected inside each of the two first slide rails. Each of the two first sliding seats has a second slide rail at its rearmost end face, and a second sliding seat is slidably connected inside each of the two second slide rails. A support rod is fixedly connected to the upper surface of each of the two second sliding seats. The two support rods are fixedly connected to the display device. Pulling out the two first sliding seats upwards allows them to slide upwards along the two first slide rails. Pulling out the two second sliding seats upwards allows them to move upwards along the two second slide rails, facilitating the unfolding of the device.

[0013] Preferably, a first limiting hole is provided at the upper front end of the inner sidewall of the two first slide rails that are far apart from each other, and a second limiting hole is provided at the upper front end of the inner sidewall of the two second slide rails that are far apart from each other. A storage groove is provided at the lower front end of the two first sliding seats that are far apart from each other and at the lower front end of the two second sliding seats that are far apart from each other. A spring is fixedly connected inside each of the four storage grooves, and a pressure block is fixedly connected to the other end of each of the four springs. The four pressure blocks are slidably connected inside the two first limiting holes and the two second limiting holes, respectively. When the four pressure blocks are pressed, the four pressure blocks enter the four storage grooves and press down on the first and second sliding seats, so that the first and second sliding seats slide down along the first and second slide rails, which facilitates limiting and storage.

[0014] Preferably, a triangular support plate is fixedly connected to the upper part of the front end face of each of the two mounting seats. Sliding grooves are provided on one side wall of the two mounting seats at the front end of the two first slide rails, and on one side wall of the two first sliding seats at the front end of the two second slide rails, and on the end face of the two second sliding seats that are close to each other. Flip plates are provided between the two mounting seats, between the two first sliding seats, and between the two second sliding seats. Cylinders are fixedly connected to the rear side walls of the three flip plates. The six cylinders are slidably connected inside the six sliding grooves. When the three flip plates are flipped upwards and are perpendicular to the equipment, the three flip plates are lowered so that the three cylinders reach the bottom of the three sliding grooves, so that the equipment can be continuously stored.

[0015] Preferably, each of the six sliding grooves has a rotation limiting groove at the upper part of its inner wall. When the six cylinders reach the upper part of the six sliding grooves, they flip forward and the three flipping plates are supported by the six rotation limiting grooves, which facilitates unfolding.

[0016] (III) Beneficial Effects

[0017] This invention provides a manually foldable medical device support bracket. It offers the following advantages:

[0018] 1. In this invention, the moving bar is pushed to move backward, causing multiple sliders to move backward along multiple sliding grooves, while the base is attached to the front end face of the magnetic base. The magnetic base magnetically attracts the base, the hanging rods on the two first buckles are removed from the two first hooks, the two rotating square tubes are rotated so that the ends of the two rotating square tubes are attached to each other, and then the hanging rod on the second buckle is hung on the second hook to limit the two rotating square tubes, so as to facilitate the quick storage of the base.

[0019] 2. In this invention, four pressure blocks are pressed down and enter the four storage slots. The first sliding seat and the second sliding seat are pressed down and slide down along the first slide rail and the second slide rail. After reaching the bottom, the three flip plates are flipped up. When the three flip plates are perpendicular to the device, the three flip plates are lowered so that the three cylinders reach the bottom of the three sliding slots, so that the device can be continuously stored.

[0020] 3. In this invention, water is added to the interior of the two mounting bases and the interior of the two triangular support plates through four water inlet valves. As a viscous fluid, water has internal friction between molecules. When the equipment is vibrated, the internal water will flow. The relative movement between the liquid layers generates viscous resistance, which converts the kinetic energy of the vibration into heat energy, thereby attenuating the vibration. In addition, water can lower the center of gravity of the equipment and improve the stability of the equipment. Attached Figure Description

[0021] Figure 1 This is a perspective view of the present invention;

[0022] Figure 2 This is a perspective view of the invention from another angle;

[0023] Figure 3 This is a three-dimensional unfolded view of the present invention;

[0024] Figure 4 This is a three-dimensional exploded view of the present invention;

[0025] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0026] Figure 6 This is a partial perspective view of the retractable support of the present invention.

[0027] The components include: 1. base; 2. retractable bracket; 3. display device;

[0028] 101. Fixed square tube; 102. Rotating square tube; 103. First hook; 104. First buckle; 105. Caster wheel; 106. Fixed plate; 107. Moving bar; 108. Wheel frame; 109. Wheel hub; 110. Base; 111. Magnetic base; 112. Disk disk; 113. Slide groove; 114. Slider; 115. Second buckle; 116. Second hook; 117. Water inlet valve; 118. Drain valve; 119. Guide rod;

[0029] 201. Mounting base; 202. Triangular support plate; 203. Flip plate; 204. First limiting hole; 205. First slide rail; 206. First sliding seat; 207. Second limiting hole; 208. Second sliding seat; 209. Support rod; 210. Cylinder; 211. Sliding groove; 212. Rotation limiting groove; 213. Spring; 214. Pressure block; 215. Storage groove; 216. Second slide rail. Detailed Implementation

[0030] 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.

[0031] Example 1:

[0032] like Figure 1-6 As shown, this embodiment of the invention provides a manually foldable medical device support bracket, including a base 1, a retractable bracket 2 located at the rear of the upper surface of the base 1, and a display device 3 fixedly connected to the upper surface of the retractable bracket 2.

[0033] like Figure 1 , 2As shown in Figures 3 and 4, the base 1 includes two fixed square tubes 101. A rotating square tube 102 is rotatably connected to the front end face of each of the two fixed square tubes 101. A first hook 103 is fixedly connected to the front end face of each of the two fixed square tubes 101 at the point where they are far apart from each other. A first buckle 104 is provided at the rear end face of each of the two rotating square tubes 102 at the point where they are far apart from each other. A fixed plate 106 is fixedly connected between the two fixed square tubes 101. Multiple sliding grooves 113 are arranged horizontally on the front end face of the fixed plate 106. Sliding sliders 114 are slidably connected inside each of the multiple sliding grooves 113. A moving strip 107 is fixedly connected to the front end of each of the multiple sliding sliders 114. The lower end face of the moving strip 107 is fixed... A base 110 is connected to the base. A magnetic base 111 is fixedly connected to the lower end face of the rear end fixing plate 106 of the base 110. A guide rod 119 is fixedly connected to the center of the rear end face of the base 110. The guide rod 119 passes through the front end face of the magnetic base 111 and extends to the rear end of the magnetic base 111. A disk 112 is fixedly connected to the end of the guide rod 119. When the moving bar 107 is pulled forward, multiple sliders 114 slide forward along multiple slide grooves 113. At this time, the guide rod 119 at the rear end of the base 110 moves forward along the magnetic base 111, so that the disk 112 is attached to the rear end face of the magnetic base 111. The base 1 is unfolded by magnetically limiting the disk 112 through the magnetic base 111.

[0034] Two fixed square tubes 101 are fixedly connected to casters 105 at the rear of their lower ends and two rotating square tubes 102 at the front of their lower ends. Two wheel frames 108 are fixedly connected to the lower ends of the moving strip 107 on both sides. Two wheel frames 108 are rotatably connected to the lower part of their interiors. The four casters 105 provide support and transportation, and the two wheel hubs 109 and the wheel frames 108 support and move the moving strip 107.

[0035] Two rotating square tubes 102 are fixedly connected to a second buckle 115 and a second hook 116 at the front of their opposite ends. The two rotating square tubes 102 are rotated so that their ends fit together. The hanging rod on the second buckle 115 is then hung on the second hook 116 to limit the position of the two rotating square tubes 102.

[0036] like Figure 1 , 2As shown in Figures 3, 4, 5, and 6, the retractable bracket 2 includes two mounting bases 201. Each mounting base 201 has a first slide rail 205 at its rear end, close to each other. A first sliding seat 206 is slidably connected inside each of the two first slide rails 205. A second slide rail 216 is provided at the rear end of each of the two first slide rails 206, close to each other. A second sliding seat 208 is slidably connected inside each of the two second slide rails 216. A support rod 209 is fixedly connected to the upper end of each of the two second slide seats 208. The two support rods 209 are fixedly connected to the display device 3. When the two first slide seats 206 are pulled out upwards, they slide upwards along the two first slide rails 205. When the two second slide seats 208 are pulled out upwards, they move upwards along the two second slide rails 216, facilitating the unfolding of the device.

[0037] Each of the two first slide rails 205 has a first limiting hole 204 at the upper front end of its inner sidewall, which is far apart from each other. Each of the two second slide rails 216 has a second limiting hole 207 at the upper front end of its inner sidewall, which is far apart from each other. Each of the two first sliding seats 206 and the two second sliding seats 208 has a storage slot 215 at the lower front end of their respective ends, which is far apart from each other. Each of the four storage slots 215 has a spring 213 fixedly connected inside. Each of the four springs 213 has a pressure block 214 fixedly connected to its other end. The four pressure blocks 214 are slidably connected inside the two first limiting holes 204 and the two second limiting holes 207, respectively. When the four pressure blocks 214 are pressed, they enter the four storage slots 215. The first sliding seats 206 and the second sliding seats 208 are pressed down, causing them to slide down along the first slide rails 205 and the second slide rails 216, which facilitates positioning and storage.

[0038] Triangular support plates 202 are fixedly connected to the upper front face of each of the two mounting bases 201. Sliding grooves 211 are provided on the side wall of the two mounting bases 201 at the front of the two first slide rails 205, and on the side wall of the two first sliding seats 206 at the front of the two second slide rails 216, close to the end face of the two second sliding seats 208. Flip plates 203 are provided between the two mounting bases 201, between the two first sliding seats 206, and between the two second sliding seats 208. Cylinders 210 are fixedly connected to the rear side walls of the three flip plates 203. The six cylinders 210 are slidably connected inside the six sliding grooves 211. The three flip plates 203 are flipped upwards. When the three flip plates 203 are perpendicular to the equipment, the three flip plates 203 are lowered so that the three cylinders 210 reach the bottom of the three sliding grooves 211, so that the equipment can be continuously stored.

[0039] Each of the six sliding grooves 211 has a rotation limiting groove 212 at the upper part of its inner wall. When the six cylinders 210 reach the upper part of the six sliding grooves 211, they flip forward and support the three flipping plates 203 through the six rotation limiting grooves 212, which facilitates unfolding.

[0040] Example 2:

[0041] This embodiment is based on Embodiment 1: Water inlet valves 117 are fixedly connected to the center of the upper end face of the two fixed square tubes 101 and the center of the upper end face of the two rotating square tubes 102. Drain valves 118 are fixedly connected to the lower front end of the two fixed square tubes 101 and the lower center of the two rotating square tubes 102. Water is added to the interior of the two mounting bases 201 and the two triangular support plates 202 through the four water inlet valves 117. Water, as a viscous fluid, has internal friction between molecules. When the equipment is vibrated, the internal water will flow, and the relative movement between the liquid layers will generate viscous resistance, converting the kinetic energy of the vibration into heat energy, thereby attenuating the vibration. Furthermore, water can lower the center of gravity of the equipment, improving its stability. After use, water is drained through the drain valves 118.

[0042] Working principle: When unfolded, the hanging rod on the second buckle 115 is removed from the second hook 116, the two rotating square tubes 102 are rotated, and the outer hanging rods of the two first buckles 104 are hung on the two first hooks 103 to limit the two rotating square tubes 102. Then, the moving bar 107 is pulled forward, so that multiple sliders 114 slide forward along multiple sliding grooves 113. At this time, the guide rod 119 at the rear end of the base 110 moves forward along the magnetic base 111, so that the disk 112 is attached to the rear end face of the magnetic base 111. The magnetic base 111 magnetically limits the disk 112, while the two hubs 109 roll on the ground to support the movement, thus unfolding the base 1.

[0043] Next, pull out the two first sliding seats 206 upwards. The two first sliding seats 206 slide upwards along the two first slide rails 205. When the two pressure blocks 214 inside the two storage slots 215 on both sides of the first sliding seats 206 move to the two first limiting holes 204, the tension of the two springs 213 pushes the two pressure blocks 214 into the two first limiting holes 204 for limiting. Then, pull out the second sliding seats 208 upwards. The two second sliding seats 208 move upwards along the two second slide rails 216. When the two pressure blocks 214 on the two second sliding seats 208 move to the two second limiting holes 207, the tension of the two springs 213 pushes the two pressure blocks 214 into the two second limiting holes 207 for limiting. Pull out the three flip plates 203 upwards. When the six cylinders 210 reach the upper end of the six sliding slots 211, they flip forward. The six rotating limiting slots 212 support the three flip plates 203 for easy unfolding.

[0044] Water is then added to the interior of the two mounting bases 201 and the two triangular support plates 202 through four water inlet valves 117. As a viscous fluid, water has internal friction between molecules. When the equipment is vibrated, the water inside will flow. The relative movement between the liquid layers generates viscous resistance, which converts the kinetic energy of the vibration into heat energy, thereby attenuating the vibration. In addition, water can lower the center of gravity of the equipment and improve the stability of the equipment.

[0045] After use, drain water through drain valve 118. After draining, push moving bar 107 backward, causing multiple sliders 114 to move backward along multiple sliding grooves 113. Base 110 adheres to the front end face of magnetic base 111, and magnetic base 111 magnetically attracts base 110. Remove the hanging rods on the two first buckles 104 from the two first hooks 103, rotate the two rotating square tubes 102 so that the ends of the two rotating square tubes 102 adhere to each other, and then hang the hanging rod on the second buckle 115 on the second hook 116. Two rotating square tubes 102 limit the movement, press down four pressure blocks 214, the four pressure blocks 214 enter the four storage slots 215, press down the first sliding seat 206 and the second sliding seat 208, so that the first sliding seat 206 and the second sliding seat 208 slide down along the first slide rail 205 and the second slide rail 216. After reaching the bottom, the three flip plates 203 are flipped up. When the three flip plates 203 are perpendicular to the equipment, the three flip plates 203 are lowered, so that the three cylinders 210 reach the bottom of the three sliding slots 211, so that the equipment can be continuously stored.

[0046] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A manually stowable and foldable medical device support cradle comprising a base (1), characterized in that: The bottom base (1) is provided with a retractable support (2) at the upper end surface of the rear, and the upper end surface of the retractable support (2) is fixedly connected with a display device (3); The bottom base (1) comprises two fixed square tubes (101), the front end surface of each of the two fixed square tubes (101) is rotatably connected with a rotating square tube (102), the front end surface of the end of each of the two fixed square tubes (101) away from each other is fixedly connected with a first hook (103), the rear end surface of the end of each of the two rotating square tubes (102) away from each other is provided with a first buckle (104), the two fixed square tubes (101) are fixedly connected with a fixed plate (106), a plurality of slide grooves (113) are horizontally arranged and formed at the front end surface of the fixed plate (106), a plurality of slide blocks (114) are slidably connected inside the plurality of slide grooves (113), a moving strip (107) is fixedly connected to the front end of each of the plurality of slide blocks (114), a base (110) is fixedly connected to the lower end surface of the moving strip (107), a magnetic seat (111) is fixedly connected to the lower end surface of the rear end of the fixed plate (106), a guide rod (119) is fixedly connected to the center of the rear end surface of the base (110), the guide rod (119) penetrates through the front end surface of the magnetic seat (111) to the rear end of the magnetic seat (111), and a magnetic disc (112) is fixedly connected to the end portion.

2. The manually stowable and foldable medical device support cradle of claim 1, wherein: The rear end surface of the lower end of each of the two fixed square tubes (101) away from each other is fixedly connected with a universal wheel (105), and the rear end surface of the lower end of each of the two rotating square tubes (102) away from each other is fixedly connected with a universal wheel (105).

3. The manually stowable and foldable medical device support cradle of claim 1, wherein: The front end surface of the end of each of the two rotating square tubes (102) away from each other is fixedly connected with a second buckle (115) and a second hook (116), respectively.

4. The manually stowable and foldable medical device support cradle of claim 1, wherein: The center of the front end surface of the upper end of each of the two fixed square tubes (101) away from each other is fixedly connected with a water inlet valve (117), and the center of the front end surface of the upper end of each of the two rotating square tubes (102) away from each other is fixedly connected with a water inlet valve (117).

5. The manually stowable and foldable medical device support cradle of claim 1, wherein: The retractable support (2) comprises two mounting seats (201), the rear end surface of the end of each of the two mounting seats (201) away from each other is provided with a first slide (205), the inside of each of the two first slides (205) is slidably connected with a first sliding seat (206), the rear end surface of the end of each of the two first sliding seats (206) away from each other is provided with a second slide (216), the inside of each of the two second slides (216) is slidably connected with a second sliding seat (208), the upper end surface of each of the two second sliding seats (208) is fixedly connected with a supporting rod (209), and the two supporting rods (209) and the display device (3) are fixedly connected.

6. A manually stowable and foldable medical device support cradle as defined in claim 5, wherein: Two first sliding seats (206) and two second sliding seats (208) are arranged on the two first sliding rails (205) and the two second sliding rails (216) respectively, and the two first sliding seats (206) and the two second sliding seats (208) are arranged on the two first sliding rails (205) and the two second sliding rails (216) respectively.

7. The manually stowable and foldable medical device support cradle of claim 5, wherein: The upper end of the front inner wall of the two first sliding rails (205) and the upper end of the front inner wall of the two second sliding rails (216) are provided with first limiting holes (204) and second limiting holes (207) respectively, and the lower end of the front end face of one end of the two first sliding seats (206) and the lower end of the front end face of one end of the two second sliding seats (208) are provided with storage grooves (215).

8. The manually stowable and foldable medical device support cradle of claim 7, wherein: The upper end of the front inner wall of the two first sliding rails (205) and the upper end of the front inner wall of the two second sliding rails (216) are provided with first limiting holes (204) and second limiting holes (207) respectively, and the lower end of the front end face of one end of the two first sliding seats (206) and the lower end of the front end face of one end of the two second sliding seats (208) are provided with storage grooves (215). The upper end of the front inner wall of the two first sliding rails (205) and the upper end of the front inner wall of the two second sliding rails (216) are provided with first limiting holes (204) and second limiting holes (207) respectively, and the lower end of the front end face of one end of the two first sliding seats (206) and the lower end of the front end face of one end of the two second sliding seats (208) are provided with storage grooves (215). The upper end of the front inner wall of the two first sliding rails (205) and the upper end of the front inner wall of the two second sliding rails (216) are provided with first limiting holes (204) and second limiting holes (207) respectively, and the lower end of the front end face of one end of the two first sliding seats (206) and the lower end of the front end face of one end of the two second sliding seats (208) are provided with storage grooves (215). The upper end of the front inner wall of the two first sliding rails (205) and the upper end of the front inner wall of the two second sliding rails (216) are provided with first limiting holes (204) and second limiting holes (207) respectively, and the lower end of the front end face of one end of the two first sliding seats (206) and the lower end of the front end face of one end of the two second sliding seats (208) are provided with storage grooves (215). The upper end of the front inner wall of the two first sliding rails (205) and the upper end of the front inner wall of the two second sliding rails (216) are provided with first limiting holes (204) and second limiting holes (207) respectively, and the lower end of the front end face of one end of the two first sliding seats (206) and the lower end of the front end face of one end of the two second sliding seats (208) are provided with storage grooves (215). The upper end of the front inner wall of the two first sliding rails (205) and the upper end of the front inner wall of the two second sliding rails (216) are provided with first limiting holes (204) and second limiting holes (207) respectively, and the lower end of the front end face of one end of the two first sliding seats (206) and the lower end of the front end face of one end of the two second sliding seats (208) are provided with storage grooves (215). The upper end of the front inner wall of the two first sliding rails (205) and the

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