A wing spread double opening table top dissection table

Abstract

The application discloses a wingspan type double-opening table top dissection table and relates to the technical field of teaching instruments. The wingspan type double-opening table top dissection table comprises a box body and further comprises: a preservative storage box which is detachably connected to the inside of the box body and is provided with a guide groove between the lateral outer wall of the preservative storage box and the mouth frame of the box body; and a double-opening cover plate assembly which comprises two roller blinds symmetrically arranged on both sides of the upper opening of the box body. The double-opening cover plate assembly is arranged to reduce the single-side movement stroke by half, thereby improving the opening and closing efficiency of the cover plate, shortening the path length of the debris rolled into the guide groove and reducing the risk of debris deep jam caused by long-stroke pushing. An annular collecting frame is arranged to move with the lifting table and be stopped by the placing frame. When the dissection table is lifted, the annular collecting frame can serve as an edge protection to prevent debris from splashing. When the dissection table is lowered and stored, the annular collecting frame is automatically switched to stay at the opening of the box body to collect the debris on the sliding path of the roller blind, thereby realizing effective physical isolation between the working area and the storage area.

Description

Technical Field

[0001] This invention relates to the field of teaching instrument technology, specifically to a wingspan double-opening dissection table. Background Technology

[0002] In medical school teaching of regional anatomy and forensic pathology research, the dissection table is a core piece of equipment for teaching and specimen processing. In order to properly preserve anatomical specimens, the dissection table is usually equipped with a preservative storage box and a cover structure that closes the top of the box. During teaching or experimental breaks, the cover needs to be closed to seal the box; while during dissection, the cover needs to be fully opened to expose the dissection table surface inside.

[0003] Traditional laboratory dissection tables typically use rigid covers, either integral or separate. When opening the cover, it is usually moved manually. However, due to the large weight of the cover, manual handling is not only time-consuming and labor-intensive, but also requires additional space for storage after the cover is moved away from the dissection table due to limited laboratory space. This is very inconvenient and reduces the efficiency of teaching and experiments.

[0004] To address the aforementioned technical problems of laborious manual lid handling and space occupation, a Chinese patent (publication number CN115245433A) discloses an automatically opening and closing laboratory dissection table to solve these problems. The technical solution disclosed in this patent document is as follows: "It includes a preservative storage box, a dissection table surface disposed within the preservative storage box, and a cover plate that closes to the top of the preservative storage box. The cover plate is a flexible, rollable structure. Guide grooves are respectively provided along the upper edge of the inner walls on both sides of the preservative storage box, and guide grooves are respectively provided at both ends of the preservative storage box." The invention includes a winding mechanism for winding the cover plate and a stretching mechanism for stretching the cover plate, with each side of the cover plate inserted into a guide groove. By incorporating a winding mechanism at one end of the preservative storage tank and designing the cover plate as a flexible, rollable structure, the invention achieves automatic opening of the cover plate through the winding mechanism. Simultaneously, the stretching mechanism at the other end of the preservative storage tank, in conjunction with the unwinding of the winding mechanism, enables automatic closing of the cover plate. This ultimately solves the technical problem of current laboratory dissection tables requiring manual opening and the space-consuming storage of the cover plate.

[0005] However, this existing "roller blind" structure has obvious mechanical limitations and cleaning difficulties in practical applications: flexible roller blinds are usually spliced ​​together from multiple slats and connecting strips, with longitudinal splicing seams all over the surface. When dissecting or using it as a teaching table, solid impurities such as tissue debris, dust, and eraser shavings are easily dropped and stuck in these complex transition gaps. This structure is extremely difficult to clean thoroughly by conventional surface wiping. More seriously, as solid debris continues to accumulate in the gaps between the guide rails and slats, it is very easy for the roller blind to experience physical jamming and mechanical interference when rolling up and unfolding, which seriously affects the service life of the drive mechanism and the smoothness of opening and closing. Summary of the Invention

[0006] The purpose of this invention is to provide a wing-shaped double-opening dissection table, which, through the linkage of double-opening roller shutters, lifting collection frames and self-cleaning components, enables convenient switching and synchronous cleaning of different usage states, solving the problems of debris jamming and pollution hazards.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0008] A wing-shaped double-opening dissection table includes a housing and further includes: a preservative storage box detachably connected to the interior of the housing, with a guide groove formed between the outer side wall of the preservative storage box and the opening frame of the housing; a double-opening cover assembly including two roller shutters symmetrically arranged on both sides of the upper opening of the housing, with the ends of the two roller shutters close to each other forming pilot sections, and a drive mechanism for driving the roller shutters to slide and close towards the center of the housing or to retract and open towards both ends along the guide groove; and a lifting assembly disposed inside the preservative storage box, including a lifting platform and a mechanism for driving the lifting platform to lift. The lifting drive structure includes a collection assembly comprising a placement rack located on the inner wall of the housing near the upper opening, and an annular collection frame. The annular collection frame is fitted around the outer periphery of the lifting platform. When the lifting platform is raised, the annular collection frame is supported by the lifting platform to be in working condition. When the lifting platform descends below the placement rack, the annular collection frame is stopped by the placement rack and supported at the upper opening of the housing. A self-cleaning assembly is located at two pilot sections and configured to scrape dirt and debris from the guide grooves into the annular collection frame supported by the placement rack during the closing of the two roller shutters.

[0009] By adopting the above technical solution and setting up a double-opening cover assembly, the single-sided movement stroke is reduced by half, which not only improves the opening and closing efficiency of the cover, but also shortens the path length of debris being rolled into the guide groove, reducing the risk of debris getting stuck due to long stroke pushing.

[0010] Furthermore, by setting up a ring-shaped collection frame that can move with the lifting platform and be stopped by the placement rack, it can act as an edge protection to prevent debris from splashing when the dissection table is raised, and automatically switch to stay at the opening of the box to collect debris on the sliding path of the roller shutter when the dissection table is lowered for storage, thus achieving effective physical isolation between the work area and the storage area.

[0011] Furthermore, by setting a self-cleaning component in the pilot section, it moves synchronously with the pilot section during the closing process of the roller shutter, directly scraping the dirt and debris in the guide groove into the annular collection frame in the stopped state. The synchronous cleaning of the guide groove is achieved by the closing action of the roller shutter itself, avoiding dirt retention.

[0012] A further improvement of the technical solution of the present invention is that: the self-cleaning component includes a swing arm hinged to the pilot section and a slag-pushing block fixedly connected to the end of the swing arm; a spring hanging column and two limiting columns for limiting the swing range of the swing arm are fixedly provided on the pilot section to define the working position of the slag-pushing block abutting the guide groove and the retracted position of avoiding the guide groove; a tension spring is connected between the swing arm and the spring hanging column, and the extension axis of the tension spring can cross the hinge center of the swing arm when the swing arm swings, so that the slag-pushing block can be stably maintained in the working position or the retracted position under the action of elastic force; a reset frame is fixedly connected inside the housing, configured to push the swing arm to spring back to the working position when the roller shutter retracts to the limit position.

[0013] By adopting the above technical solution, a bistable self-cleaning assembly consisting of a swing arm, a limiting post, and a tension spring is set in the pilot section. This allows the slag pusher block to be stably locked in the working position or the retracted position by the elastic force after the extension axis of the tension spring crosses the hinge center. This achieves a purely mechanical dual-state switching and avoids scraping back dirt when the roller shutter retracts and opens. By setting a reset frame inside the housing, the mechanical stroke of the roller shutter when it retracts and opens to the limit position is used to push the swing arm, achieving a purely mechanical automatic reset of the cleaning assembly to the working position.

[0014] A further improvement of the technical solution of the present invention is that: the self-cleaning components on both sides adopt an asymmetrical timing avoidance structure; a force-bearing column is fixedly connected to the top of the slag pushing block or swing arm of one side of the self-cleaning component, and a trigger stop block corresponding to the force-bearing column is fixedly connected inside the box; during the process of the two roller shutters closing towards the middle of the box, the force-bearing column contacts the trigger stop block first, forcing the slag pushing block on that side to switch to the avoidance and retraction position first; after the slag pushing block of the other side of the self-cleaning component continues to move forward and sweeps through the closed center area, it abuts against the end face of the opposite pilot part and is pressured to switch to the avoidance and retraction position.

[0015] By adopting the above technical solution and setting an asymmetric timing avoidance structure, the trigger block inside the box forces the force column of one side of the slag pusher to contact and be compressed first, so that the slag pusher on that side switches to the avoidance and retracted position first. This avoids the mechanical instability when the two slag pushers squeeze each other, eliminates the mechanical impact problem of the other side losing its reaction force and hitting the pilot part due to the flipping of one side, and improves the stability and service life of the component operation.

[0016] A further improvement of the technical solution of the present invention is as follows: the driving mechanism includes a winding motor, a winding frame, and a winding drum respectively corresponding to the two roller blinds. The winding frame is fixedly connected inside the housing, and the winding drum is rotatably connected to the winding frame and coaxially fixedly connected to the output shaft of the corresponding winding motor. The tail ends of the two roller blinds are respectively wound onto the corresponding winding drums. A central fixed shaft is fixedly connected inside the housing, and a winding reel with a cavity is rotatably connected to the outside of the central fixed shaft. A coil spring is provided inside the cavity, and the two ends of the coil spring are fixedly connected to the winding reel and the central fixed shaft respectively. Two suspension cables are wound around the outside of the winding reel, and movable pulleys are rotatably connected to the two pilot parts respectively. Fixed pulleys are rotatably connected to the corresponding sides inside the housing respectively. The ends of the two suspension cables away from the winding reel extend to the sides respectively, pass around the fixed pulleys and movable pulleys on the corresponding sides in sequence, and are fixedly connected to the inside of the housing. The movable pulleys located on different pilot parts are staggered in the horizontal direction.

[0017] By adopting the above technical solution, by setting an active opening and winding structure corresponding to the winding motors at both ends, and a shared passive energy storage closing traction structure with a winding reel and a coil spring, the independent motor and complex synchronous electrical control system for closing are eliminated. This not only reduces equipment cost and space occupation, but also ensures the absolute equality and synchronization of the closing traction force on both sides by using the mechanical tension of a shared single coil spring, avoiding the risk of skew and jamming that is easily caused by dual drive sources.

[0018] A further improvement of the technical solution of the present invention is that: the drive mechanism also includes a speed-stabilizing damping component; an eccentric wheel is coaxially fixedly connected to the side of the winding reel; a connecting rod is hinged to the part of the eccentric wheel that is off-center from the rotation center; a damping cylinder is fixedly installed inside the housing; a piston is slidably and sealed inside the damping cylinder; the end of the connecting rod away from the eccentric wheel extends into the inside of the damping cylinder and is hinged to the piston; a flow-limiting pipe communicating with the external environment is provided on the damping cylinder; a flow regulating valve is installed on the flow-limiting pipe.

[0019] By adopting the above technical solution and setting a speed-stabilizing damping component, the unidirectional rotational motion of the winding reel is converted into the reciprocating linear motion of the piston in the damping cylinder. The pneumatic damping generated by the piston compressing air counteracts the initial peak elastic force released by the coil spring, which not only weakens the instantaneous acceleration at the initial stage of the roller shutter closing, but also avoids the violent impact when the center converges, thus improving the operational safety and service life of the equipment.

[0020] Furthermore, by installing a flow-limiting pipe and a flow regulating valve on the damping cylinder to connect to the external environment, the exhaust resistance inside the cylinder becomes adjustable. Operators can quantitatively adjust the exhaust cross-sectional area according to the weight of the cover plate or the actual closing speed requirement, thereby achieving precise control of the magnitude of the purely mechanical pneumatic damping and ensuring smooth and slow operation throughout the entire closing stroke.

[0021] A further improvement of the technical solution of the present invention is that: a guide roller is rotatably connected to the winding frame, and the top tangent of the guide roller is flush with the bottom surface of the guide groove; the winding drum is located obliquely below the guide roller, so that the roller shutter forms a downwardly inclined winding guide section as it passes around the guide roller and extends to the winding drum; a support frame is fixedly installed inside the box, and the support frame is provided with an external cleaning component for cleaning debris from the surface of the winding guide section; a collection box is fixedly connected inside the box below the winding frame.

[0022] By adopting the above technical solution, a guide roller is set on the winding frame, and the winding drum is positioned diagonally below the guide roller. This allows the roller shutter to form a downward-sloping winding guide section after changing direction via the guide roller. Utilizing this inclined configuration in conjunction with the dynamic physical movement of the roller shutter during the rewinding process, solid debris adhering to the surface naturally loosens and slides downwards under the combined action of gravity and the dynamic vibration of the slats. This avoids the problem of debris being firmly adsorbed and directly rolled in during horizontal winding, significantly weakening the adhesion of surface impurities from a physical and mechanical perspective. The swept-down debris can fall directly downwards into the collection box along the direction of gravity, preventing secondary accumulation and jamming of debris around the cleaning mechanism. This significantly improves the efficiency of impurity removal and collection on the outer surface of the roller shutter. The collection box is detachably connected inside the housing for easy cleaning.

[0023] A further improvement of the technical solution of the present invention is that: the external cleaning component includes a guide rod slidably passing through the support frame, one end of the guide rod is fixedly provided with a limiting head, and the other end is fixedly connected to a cleaning frame; a roller brush is rotatably connected inside the cleaning frame, and a cleaning motor for driving the roller brush to rotate is fixedly installed on the outside; the roller brush is surrounded by bristles, and the bristles are in contact with the surface of the winding guide section; the two ends of the roller brush are coaxially rotatably connected with abutment plates, and the outer edge of the abutment plates is always in contact with the outer ring of the roller shutter already wound on the winding drum; a clamping spring is sleeved on the outside of the guide rod, and the two ends of the clamping spring are respectively in contact with the support frame and the cleaning frame, for providing an elastic thrust that keeps the abutment plates pressing against the outer ring of the roller shutter, so that the position of the roller brush can be adaptively translated and adjusted according to the change of the winding diameter of the winding drum.

[0024] By adopting the above technical solution, a guide rod, a cleaning frame, and a clamping spring sleeved on the outside of the guide rod are slidably installed on the support frame, providing an elastic thrust that always presses against the outer ring of the roller brush. This allows the relative position of the roller brush to adaptively shift backward or forward according to the real-time change of the winding diameter of the take-up drum, ensuring that the bristles always contact the surface of the take-up guide section at a constant depth throughout the entire take-up or unwinding process. This avoids the physical interference problems of fixed bristles not cleaning properly or being jammed and crushed.

[0025] A further improvement of the technical solution of the present invention is that: the two pilot parts are provided with a stepped staggered overlapping structure at the junction where they close towards the middle of the box; one of the pilot parts has an upper overlapping step extending forward on its end face, and the other pilot part has a lower overlapping step extending forward on its end face.

[0026] By adopting the above technical solution and setting a stepped staggered overlapping structure, one pilot section has an upper overlapping step and the other pilot section has a lower overlapping step. This transforms the originally straight splicing gap into a tortuous stepped seam path, blocking the direct physical channel for liquid and small debris to seep vertically downwards, and improving the isolation and sealing performance at the middle confluence of the double-opening tabletops. The upper and lower overlapping steps press against each other when closed, achieving staggered sealing while ensuring that the top surfaces of the two pilot sections are on the same horizontal plane. This meets the requirement for overall surface flatness when the equipment is used as a teaching tabletop and avoids interference caused by protruding seams for writing or placing utensils.

[0027] A further improvement of the technical solution of the present invention is that: the bottom inner periphery edge of the annular collection frame is provided with a downwardly flared guide surface; the guide surface is a transition rounded corner.

[0028] By adopting the above technical solution, a downwardly flared guide surface is set on the bottom inner periphery of the annular collection frame. The inclined guide effect of the transition rounded corner is used to convert the upward vertical thrust of the lifting platform into a horizontal component force that pushes the collection frame to make radial fine adjustments. This achieves adaptive centering guidance between the lifting platform and the annular collection frame at the moment of engagement, avoids mechanical collision and jamming when the components are joined, and improves the smoothness of equipment operation.

[0029] By adopting the above technical solution, the technical effects achieved by this invention compared to the prior art are as follows:

[0030] 1. This invention provides a wing-shaped double-opening dissection table. Through the coordinated linkage of the double-opening roller shutter assembly, the lifting assembly, and the collection assembly, effective physical isolation between the work area and the preservative storage area is achieved between the dissection and storage states. At the same time, the mechanical action of the roller shutter closing, along with the self-cleaning assembly, simultaneously scrapes away dirt in the guide groove, fundamentally solving the hidden dangers of operational failure and cross-contamination caused by debris jamming. Furthermore, the table surface has extremely high surface rigidity and flatness after closing, meeting the needs of multi-scenario teaching reuse.

[0031] 2. This invention provides a wing-shaped double-opening dissection table. By setting a slag-pushing block with automatic switching state, and utilizing a purely mechanical asymmetric timing and state switching design, it ensures that the cleaning components scrape slag only when closed, and automatically avoid and retract when opened and retracted. This not only avoids the dirt being scraped back into the equipment, but also completely eliminates the mechanical collision interference and cleaning dead zone when the double-opening covers meet in the middle.

[0032] 3. This invention provides a wingspan double-opening dissection table, which uses a coil spring system with a damping speed limiting structure to pull the roller shutter, ensuring absolute equality and synchronization of the closing pull force of the roller shutter on both sides from a physical level; and is supplemented by an adjustable pneumatic damping speed stabilization system, which effectively weakens the instantaneous acceleration at the initial stage of closing, avoids destructive impact at the center, and eliminates the safety hazard of pinching the operator.

[0033] 4. This invention provides a wing-shaped double-opening dissection table that utilizes an inclined winding guide path combined with gravity-assisted slag removal, and an external cleaning structure capable of adaptive fixed-distance tracking according to changes in winding diameter, to ensure that dry impurities on the surface of the roller shutter are completely removed before being wound and stored, thus preventing wear and hygiene contamination of the core transmission components inside the equipment. Attached Figure Description

[0034] The invention will now be further described with reference to the accompanying drawings.

[0035] Figure 1 This is a three-dimensional structural diagram of the double-opening cover assembly of the present invention in the closed state;

[0036] Figure 2 This is a three-dimensional structural diagram of the lifting platform of the present invention in the raised state;

[0037] Figure 3 This is a top cross-sectional view of the double-opening cover assembly of the present invention in the closed and raised states of the lifting platform;

[0038] Figure 4 This is a side sectional view of the double-opening cover assembly of the present invention in the closed and raised states of the lifting platform;

[0039] Figure 5 This is a partial structural schematic diagram of the driving mechanism of the present invention;

[0040] Figure 6 This is a schematic diagram of the disassembled structure of the speed-stabilizing damping component of the present invention;

[0041] Figure 7 This is a schematic diagram of the structure of the self-cleaning component and the external cleaning component of the present invention;

[0042] Figure 8 This is a schematic diagram of the structure of the double-opening cover assembly and the driving mechanism of the present invention;

[0043] Figure 9 This is a schematic diagram of the structure of the self-cleaning component of the present invention;

[0044] Figure 10 This is a cross-sectional view of the housing of the present invention;

[0045] Figure 11 For the present invention Figure 4 Enlarged view of point A in the middle;

[0046] In the diagram: 1. Box body; 101. Guide groove; 102. Corrosion inhibitor storage box; 103. Placement rack; 104. Support frame; 2. Self-cleaning assembly; 201. Swing arm; 202. Slag pusher block; 203. Spring hanging column; 204. Limiting column; 205. Tension spring; 206. Force-bearing column; 207. Collection box; 208. Reset frame; 209. Trigger stop block; 3. Double-opening cover assembly; 301. Roller shutter; 302. Pilot section; 303. Upper overlapping step; 304. Lower overlapping step; 4. Drive mechanism; 401. Winding frame; 402. Directional roller; 403. Winding motor; 404. Winding drum; 40 5. Rewind reel; 406. Coil spring; 407. Lifting cable; 408. Moving pulley; 409. Fixed pulley; 410. Central fixed axis; 5. Speed ​​stabilizing damping assembly; 501. Eccentric wheel; 502. Connecting rod; 503. Damping cylinder; 504. Piston; 505. Flow limiting tube; 506. Flow regulating valve; 6. Lifting assembly; 601. Lifting platform; 602. Lifting drive structure; 701. Annular collection frame; 702. Guide surface; 8. External cleaning assembly; 801. Guide rod; 802. Limiting head; 803. Cleaning frame; 804. Roller brush; 805. Cleaning motor; 806. Abutment plate; 807. Pressing spring. Detailed Implementation

[0047] The present invention will be further described in detail below with reference to the embodiments.

[0048] Example 1

[0049] like Figures 1-11As shown, the present invention provides a wing-shaped double-opening dissection table, including a housing 1, and further comprising: a preservative storage box 102, detachably connected to the interior of the housing 1, wherein a guide groove 101 is formed between the outer side wall of the preservative storage box 102 and the opening frame of the housing 1; a double-opening cover assembly 3, including two roller blinds 301 symmetrically arranged on both sides of the upper opening of the housing 1, wherein the ends of the two roller blinds 301 that are close to each other are respectively formed as pilot parts 302, and a drive mechanism 4 for driving the roller blinds 301 to move and close along the guide groove 101 toward the middle of the housing 1 or to retract and open at both ends; a sealing strip extending horizontally is provided inside the guide groove 101; and a lifting assembly 6, disposed inside the preservative storage box 102, including a lifting platform 601 and The lifting drive structure 602 drives the lifting platform 601 to rise and fall; the collection assembly includes a placement rack 103 disposed on the inner wall of the housing 1 near the upper opening, and an annular collection frame 701; the annular collection frame 701 is sleeved around the outer periphery of the lifting platform 601, and when the lifting platform 601 is raised, the annular collection frame 701 is supported by the lifting platform 601 to be in working condition; when the lifting platform 601 descends below the placement rack 103, the annular collection frame 701 is stopped by the placement rack 103 and supported at the upper opening of the housing 1; the self-cleaning assembly 2 is disposed on two pilot parts 302, and is configured to scrape dirt and debris at the guide groove 101 into the annular collection frame 701 supported by the placement rack 103 during the closing of the two roller shutters 301.

[0050] In actual dissection operations, tissue debris, dust, and impurities are easily dropped and stuck in the guide groove 101. Conventional surface wiping is difficult to clean thoroughly. Long-term accumulation of these debris can cause physical jamming of the roller shutter 301 during opening and closing, and may even damage the drive mechanism 4. In addition, the existing equipment lacks effective physical isolation between the dissection state and the storage state. Debris on the table can easily fall directly into the preservative storage box 102 below, causing cross-contamination of the internal clean area.

[0051] In this embodiment, by setting the double-opening cover assembly 3, the single-sided movement stroke is reduced by half, which not only improves the opening and closing efficiency of the cover, but also shortens the path length of the debris being rolled into the guide groove 101, reducing the risk of debris getting stuck due to long stroke pushing.

[0052] refer to Figure 3 and Figure 4 By setting up an annular collection frame 701 that can move with the lifting platform 601 and can be stopped by the placement frame 103, it can act as an edge protection to prevent debris from splashing when the dissection table is raised, and automatically switch to stay at the opening of the box 1 to collect debris on the sliding path of the roller shutter 301 when the dissection table is lowered for storage, thus achieving effective physical isolation between the work area and the storage area.

[0053] Furthermore, by setting a self-cleaning component 2 in the pilot section 302, it moves synchronously with the pilot section 302 during the closing process of the roller shutter 301, directly scraping the dirt and debris at the guide groove 101 into the annular collection frame 701 in the stopped state. The synchronous cleaning of the guide groove 101 is achieved by the closing action of the roller shutter 301 itself, avoiding dirt retention.

[0054] refer to Figure 3 and Figure 4 When the dissection table is ready for dissection, the two roller shutters 301 are driven to retract and open along the guide groove 101 by the control drive mechanism 4. Then the lifting assembly 6 drives the lifting platform 601 to rise. The annular collection frame 701 is fitted around the outer periphery of the lifting platform 601 and is lifted synchronously, playing an edge blocking role around the dissection table surface.

[0055] After the operation is completed, the lifting platform 601 retracts downward into the preservative storage box 102. During the descent, the bottom of the annular collection frame 701 contacts the placement rack 103 on the inner wall of the box 1, and then disengages from the lifting platform 601 and is stopped and supported at the opening of the box 1. Then, the drive mechanism 4 drives the two side roller shutters 301 to move horizontally and close towards the middle of the box 1. The self-cleaning component 2 installed in the pilot part 302 moves synchronously along the guide groove 101 with the roller shutter 301, pushing the debris remaining on the path of the guide groove 101 all the way to the opening of the box 1, so that it is scraped down into the waiting annular collection frame 701 below for collection, until the two side roller shutters 301 are completely closed.

[0056] The lifting drive structure 602 is set as a scissor lift structure. The scissor lift structure is driven by a motor to lift and lower, so that the lifting platform 601 rises or falls accordingly.

[0057] Example 2

[0058] like Figure 7 , Figure 9 and Figure 11 As shown, based on Embodiment 1, the present invention provides a technical solution: Preferably, the self-cleaning component 2 includes a swing arm 201 hinged to the pilot part 302, and a slag pusher 202 fixedly connected to the end of the swing arm 201; a spring hanging column 203 and two limiting columns 204 for limiting the swing range of the swing arm 201 are fixedly provided on the pilot part 302 to define the working position and the retracted position of the slag pusher 202 abutting the guide groove 101; a tension spring 205 is connected between the swing arm 201 and the spring hanging column 203, and the extension axis of the tension spring 205 can cross the hinge center of the swing arm 201 when the swing arm 201 swings, so that the slag pusher 202 can be stably maintained in the working position or the retracted position by the elastic force; a reset frame 208 is fixedly connected inside the housing 1, configured to push the swing arm 201 to spring back to the working position when the roller shutter 301 is retracted to the limit position.

[0059] If the cleaning component remains in a downward-protruding working state during the retraction and opening of the double-opening roller shutter 301, it will scrape the dirt remaining along the way back into the roller mechanism, causing secondary pollution and mechanical jamming. If an active actuator such as a motor or cylinder is used to drive the cleaning component to lift and lower, it will increase the structural complexity and wiring difficulty in the narrow space of the guide groove 101, and reduce the operational reliability of the equipment in high humidity and corrosive environments.

[0060] In this embodiment, by setting a bistable self-cleaning assembly 2 consisting of a swing arm 201, a limiting post 204, and a tension spring 205 in the pilot section 302, the slag pusher 202 can be stably locked in the working position or the avoidance and retraction position by the elastic force after the extension axis of the tension spring 205 crosses the hinge center, realizing a purely mechanical dual-state switching and avoiding the scraping of dirt back when the roller shutter 301 retracts and opens; by setting a reset frame 208 inside the housing 1, the mechanical stroke of the roller shutter 301 when it retracts and opens to the limit position is used to push the swing arm 201, realizing a purely mechanical automatic reset of the cleaning assembly to the working position.

[0061] The slag pusher 202 has two states: working state, corresponding to the closing process of the roller shutter 301, used to scrape the residue on the moving path of the roller shutter 301 into the annular collection frame 701; and avoidance and retraction state, corresponding to the opening process of the roller shutter 301, to prevent the residue from being rolled into the deep and difficult-to-clean areas of the box 1 when the roller shutter 301 is opened.

[0062] When the roller shutter 301 is in the open state and ready to close, the slag pusher 202 is pulled against the limiting post 204 by the tension of the tension spring 205, and remains in the working state of moving along the extension path of the roller shutter 301. When the roller shutter 301 moves to the middle of the housing 1 to close, the slag pusher 202 advances synchronously along the guide groove 101 and scrapes off dirt. At the end of the closing stroke, the slag pusher 202 is pressed and drives the swing arm 201 to rotate. When the swing arm 201 rotates and the extension axis of the tension spring 205 passes through the hinge center of the swing arm 201, the direction of the elastic force is reversed, causing the slag pusher 202 to quickly flip backward and abut against another limiting post 204, locking in the avoidance and retracted position.

[0063] When the work surface needs to be opened, the roller shutter 301 retracts to both sides, and the slag pusher 202 remains in the upward avoidance retracted state, retracting with the roller shutter 301 without interference; when the roller shutter 301 retracts to the limit position close to the winding drum 404, the reset frame 208 fixedly connected inside the housing 1 abuts against and pushes the swing arm 201 to rotate in the opposite direction. When the swing arm 201 passes the hinge center again, the tension spring 205 exerts force in the opposite direction to pop the slag pusher 202 out again and lock it to the working position, completing the automatic reset of the work cycle.

[0064] like Figure 4 , Figure 7 and Figure 9 As shown, in this embodiment, preferably, the self-cleaning components 2 on both sides adopt an asymmetrical timing avoidance structure; a force-bearing column 206 is fixedly connected to the top of the slag-pushing block 202 or the swing arm 201 of one side of the self-cleaning component 2, and a trigger stop 209 corresponding to the force-bearing column 206 is fixedly connected inside the housing 1; during the process of the two roller shutters 301 closing towards the middle of the housing 1, the force-bearing column 206 contacts the trigger stop 209 first, forcing the slag-pushing block 202 on that side to switch to the avoidance and retraction position first; after the slag-pushing block 202 of the other side of the self-cleaning component 2 continues to move forward and sweeps through the closed center area, it abuts against the end face of the pilot part 302 on the opposite side and is pressured to switch to the avoidance and retraction position.

[0065] During the closing process of the double-opening roller shutter 301 towards the center, if the switching to the avoidance state is solely based on the mutual squeezing of the two pusher blocks 202 when they converge at the center, when one of the pusher blocks 202 crosses the critical point first and flips over, the other pusher block 202 will violently rebound and strike the opposite pilot part 302 due to the instantaneous loss of the opposing reaction force under the action of its own tension spring 205. Although the pusher block 202 will eventually be squeezed by the pilot part 302 and complete the state switching as the roller shutter 301 continues to close, the above process will generate unnecessary mechanical impact and structural damage. In addition, the simultaneous mutual squeezing and switching of the two pusher blocks 202 at the center position will cause a cleaning dead zone in the central convergence area of ​​the guide groove 101 that is equal to the superposition of the thickness of the two pusher blocks 202, resulting in the inability to completely remove the debris remaining in the central area.

[0066] In this embodiment, by setting an asymmetric timing avoidance structure, the trigger block 209 inside the housing 1 forces the force-bearing column 206 of one side of the slag pusher 202 to contact and be pressed first, so that the slag pusher 202 on that side switches to the avoidance and retracted position first, avoiding the mechanical instability when the two slag pushers 202 squeeze each other, eliminating the mechanical impact problem of the other side losing its reaction force and hitting the pilot part 302 due to the flipping of one side, and improving the stability and service life of the component operation;

[0067] Based on the aforementioned advance avoidance and retraction of the slag pusher 202 on one side, the slag pusher 202 on the other side can continue to move forward in a downward working state, sweeping through the closed central area originally occupied by the slag pushers 202 on both sides, and then directly abutting against the flat end face of the pilot section 302 of the opposite side roller shutter 301 and being pressured to switch to the avoidance and retraction position, completely eliminating the cleaning dead zone in the middle of the guide groove 101 and achieving complete cleaning coverage of the closed path.

[0068] At the end of the stroke of the two roller shutters 301 moving towards the middle of the housing 1 to close, the force column 206 on the top of the cleaning component 2 on one side first contacts the trigger stop 209 fixedly connected inside the housing 1. As the roller shutter 301 continues to move, the trigger stop 209 squeezes the force column 206, causing the swing arm 201 on that side to rotate, so that the extension axis of the tension spring 205 on that side passes the hinge center, and the slag pusher 202 quickly flips backward and locks in the avoidance and retraction position. At this time, the slag pusher 202 on the other side is still in the downward working position. Since the slag pusher 202 on the opposite side has been retracted in advance, the slag pusher 202 on this side can continue to move forward and smoothly sweep across the central confluence area of ​​the guide groove 101, pushing the debris remaining in this area into the annular collection frame 701 below. Subsequently, the slag pusher 202 on this side continues to move forward and directly abuts against the hard end face of the pilot part 302 on the opposite side. It rotates due to the pressure of the end face, and its tension spring 205 also passes over the hinge center and locks upward in the avoidance retracted position. The roller shutters 301 on both sides then complete the closing.

[0069] Example 3

[0070] like Figure 6 , Figure 7 and Figure 8 As shown, based on Embodiment 2, the present invention provides a technical solution: Preferably, the drive mechanism 4 includes a winding motor 403, a winding frame 401, and a winding drum 404 respectively corresponding to the two roller blinds 301. The winding frame 401 is fixedly connected inside the housing 1, and the winding drum 404 is rotatably connected to the winding frame 401 and coaxially fixedly connected to the output shaft of the corresponding winding motor 403. The tail ends of the two roller blinds 301 are respectively wound onto the corresponding winding drum 404. A central fixed shaft 410 is fixedly connected inside the housing 1, and a winding reel 405 with a cavity is rotatably connected to the outside of the central fixed shaft 410. The cavity is equipped with a coil spring 406, and the two ends of the coil spring 406 are fixedly connected to the winding reel 405 and the central fixed shaft 410, respectively. Two slings 407 are wound around the outside of the winding reel 405. Movable pulleys 408 are rotatably connected to the two pilot parts 302, and fixed pulleys 409 are rotatably connected to the corresponding sides of the inside of the housing 1. The ends of the two slings 407 away from the winding reel 405 extend to the sides, pass around the fixed pulleys 409 and movable pulleys 408 on the corresponding sides in sequence, and are fixedly connected to the inside of the housing 1. The movable pulleys 408 located on different pilot parts 302 are staggered in the horizontal direction.

[0071] In this embodiment, by setting an active opening and winding structure corresponding to the winding motors 403 at both ends, and a passive energy storage closing traction structure with a shared winding reel 405 equipped with a coil spring 406, the independent motor and complex synchronous electrical control system for closing are eliminated. This not only reduces equipment cost and space occupation, but also ensures the absolute equality and synchronization of the closing traction force on both sides by utilizing the mechanical tension of the shared single coil spring 406, thus avoiding the risk of skew and jamming that is easily caused by dual drive sources.

[0072] Furthermore, by setting a fixed pulley 409 and a movable pulley 408 on the pilot section 302, and by having the two slings 407 pass around the pulley groups on the corresponding sides, the physical stroke amplification characteristics of the pulley groups are utilized, so that the winding reel 405 only needs to release half the length of the sling 407 of the roller shutter 301 to complete the entire closing traction process. This greatly reduces the radial volume of the winding reel 405 and the deformation stroke requirement of the coil spring 406, and realizes the compact arrangement of the drive mechanism 4 in the limited space inside the housing 1.

[0073] The movable pulleys 408 located on different pilot sections 302 are staggered in the horizontal direction, so that the two side slings 407 and pulleys can be staggered on different horizontal tracks when the roller shutter 301 closes to the middle of the box body 1, avoiding mechanical interference at the end of the closing stroke and ensuring the tight closure of the double-opening cover.

[0074] When the dissection table cover is opened, the winding motors 403 at both ends of the box 1 start synchronously, driving the winding drum 404 to rotate, and winding the tail ends of the two roller blinds 301 outward onto the corresponding winding drum 404; as the roller blinds 301 are pulled outward, the pilot part 302 drives the movable pulley 408 to move outward synchronously, and the movable pulley 408 moves outward to pull the suspension cable 407, forcing the two suspension cables 407 to overcome the torque of the coil spring 406 and pull outward from the winding reel 405; the winding reel 405 rotates around the central fixed axis 410, and the internal coil spring 406 tightens continuously, converting the mechanical energy of opening the roller blinds 301 into the elastic potential energy of the coil spring 406 for storage;

[0075] When the dissection table needs to be closed, the winding motor 403 releases the tail end of the roller shutter 301, and the coil spring 406, which has stored potential energy inside the winding reel 405, releases and rebounds, driving the winding reel 405 to rotate in the opposite direction around the central fixed axis 410, automatically and synchronously winding up the two suspension cables 407; under the pull of the winding reel 405, the suspension cables 407, through the changing direction of the fixed pulleys 409 on both sides, pull the movable pulley 408 and the connected pilot section 30. 2. Move horizontally along the guide groove 101 towards the middle of the box 1; due to the mechanical transmission of the movable pulley 408 and the fixed pulley 409, for every certain length that the sling 407 is wound in, the movable pulley 408 moves forward by twice that length until it pulls the two roller shutters 301 together in the middle; at the point of convergence, because the movable pulleys 408 on both sides are horizontally staggered, the movable pulleys 408 and the sling 407 cross each other without interference, completing a purely mechanical synchronous closure.

[0076] like Figure 5 , Figure 6 and Figure 8 As shown, in this embodiment, preferably, the drive mechanism 4 further includes a speed-stabilizing damping component 5. An eccentric wheel 501 is coaxially fixedly connected to the side of the winding reel 405, and a connecting rod 502 is hinged to the part of the eccentric wheel 501 that is off-center from the rotation center. A damping cylinder 503 is fixedly installed inside the housing 1, and a piston 504 is slidably and sealed inside the damping cylinder 503. One end of the connecting rod 502 away from the eccentric wheel 501 extends into the interior of the damping cylinder 503 and is hinged to the piston 504. A flow-limiting pipe 505 communicating with the external environment is provided on the damping cylinder 503, and a flow regulating valve 506 is installed on the flow-limiting pipe 505.

[0077] During the passive traction closing of the roller shutter 301 by relying on the potential energy of the coil spring 406, the elastic force of the coil spring 406 is at its maximum peak at the initial release stage. Direct release will cause the roller shutter 301 to generate excessive instantaneous acceleration, making the closing speed of the cover uncontrollable. This uncontrollable acceleration not only easily leads to a violent and destructive impact when the two roller shutters 301 converge at the center, seriously shortening the fatigue life of the equipment structure, but also poses a safety hazard of pinching the operator or damaging the experimental equipment during the closing process. At the same time, as the elastic force of the coil spring 406 decays nonlinearly, the moving speed of the roller shutter 301 will fluctuate violently, making it impossible to achieve a smooth and uniform closing action.

[0078] In this embodiment, by setting the speed-stabilizing damping component 5, the unidirectional rotational motion of the winding reel 405 is converted into the reciprocating linear motion of the piston 504 in the damping cylinder 503. The pneumatic damping generated by the piston 504 compressing air counteracts the initial peak elastic force released by the coil spring 406, which not only weakens the instantaneous acceleration of the roller shutter 301 at the initial closing stage, but also avoids the violent impact when the center converges, thus improving the operational safety and service life of the equipment.

[0079] Furthermore, by setting a flow-limiting pipe 505 and a flow regulating valve 506 connected to the external environment on the damping cylinder 503, the exhaust resistance in the cylinder becomes adjustable. The operator can quantitatively adjust the exhaust cross-sectional area according to the weight of the cover plate or the actual closing speed requirement, thereby achieving precise control of the magnitude of the pure mechanical pneumatic damping and ensuring smooth and slow operation of the entire closing stroke.

[0080] During the process of the coil spring 406 releasing potential energy to drive the winding reel 405 to rotate and close the cover plate, the eccentric wheel 501, which is coaxially fixed to the side of the winding reel 405, rotates synchronously at high speed. The rotating eccentric wheel 501 drives the eccentrically hinged connecting rod 502, and the push-pull piston 504 performs high-frequency reciprocating sliding inside the fixed damping cylinder 503. When piston 504 compresses air in damping cylinder 503, the air inside the cylinder is forced to be discharged to the external environment through flow limiting pipe 505. Due to the throttling restriction of flow regulating valve 506 on flow limiting pipe 505, the air cannot be emptied instantly, thus forming a huge air pressure counter-thrust force (pneumatic damping) inside damping cylinder 503. This pneumatic damping acts in the opposite direction to eccentric wheel 501 through connecting rod 502, generating a mechanical braking torque on winding reel 405. This braking torque dynamically offsets the excessive driving force of coil spring 406, forcibly limiting the rotation speed of winding reel 405 within a safe range, so that the roller shutter 301 closes towards the center at a controlled and smooth speed.

[0081] Operators can change the exhaust port diameter by turning the flow regulating valve 506. The smaller the port diameter, the greater the damping and the slower the closing, thus achieving physical speed regulation.

[0082] Example 4

[0083] like Figure 4 , Figure 7 and Figure 8 As shown, based on Embodiment 1, the present invention provides a technical solution: Preferably, a guide roller 402 is rotatably connected to the winding frame 401, and the top tangent of the guide roller 402 is flush with the bottom surface of the guide groove 101; the winding drum 404 is located obliquely below the guide roller 402, so that the roller shutter 301 forms a downwardly inclined winding guide section as it passes around the guide roller 402 and extends to the winding drum 404; a support frame 104 is fixedly installed inside the housing 1, and an external cleaning component 8 for cleaning debris from the surface of the winding guide section is provided on the support frame 104; a collection box 207 is fixedly connected inside the housing 1 below the winding frame 401.

[0084] During the process of the roller shutter 301 retracting into the housing 1 and being rolled up for storage, solid debris left on the outer surface of the roller shutter 301 (i.e. the working surface facing upwards when used as a teaching table) will be rolled into the inside of the equipment along with the roller shutter 301, causing physical wear and hygiene pollution to the internal transmission mechanism.

[0085] In this embodiment, by setting a guide roller 402 on the winding frame 401 and placing the winding drum 404 diagonally below the guide roller 402, the roller blind 301 forms a downwardly inclined winding guide section after changing direction through the guide roller 402. This inclined configuration, combined with the dynamic physical movement of the roller blind 301 during the rewinding process, allows solid debris adhering to the surface to loosen naturally and slide downwards under the combined action of gravity and the dynamic shaking of the slats. This avoids the problem of debris being firmly adsorbed and directly rolled in during horizontal winding, significantly reducing the adhesion of surface impurities from a physical and mechanical perspective. The swept-down debris can fall directly downwards into the collection box 207 along the direction of gravity, preventing secondary accumulation and jamming of debris around the cleaning mechanism. This significantly improves the efficiency of impurity removal and collection on the outer surface of the roller blind 301. The collection box 207 is detachably connected inside the box body 1 for easy cleaning.

[0086] When the dissection table needs to be opened, the roller shutter 301 retracts to both sides along the guide groove 101. After traveling to the end in the straight guide groove 101, the roller shutter 301 slides over the top tangent of the guide roller 402 and changes its direction of travel under the pull of the take-up drum 404, extending towards the downward-sloping take-up drum 404. A downward-sloping and taut take-up guide section is formed between the guide roller 402 and the take-up drum 404. As the roller shutter 301 passes the guide roller 402 and continues to move along this inclined section, due to the change in the hinge angle of the slats at the bend and the physical vibration of the mechanical movement, the dust and solid debris attached to the surface lose their original horizontal support balance under the pull of gravity and tend to slide downward. At this time, with the contact cleaning of the inclined surface by the external cleaning component 8 fixedly installed inside the box 1, these debris that are already in a loose and sliding state are completely peeled off and fall directly into the collection box 207 below along the inclined gravity direction.

[0087] like Figure 2 , Figure 4 and Figure 7As shown, preferably, the external cleaning assembly 8 includes a guide rod 801 slidably passing through the support frame 104. One end of the guide rod 801 is fixedly provided with a limiting head 802, and the other end is fixedly connected to a cleaning frame 803. A roller brush 804 is rotatably connected inside the cleaning frame 803, and a cleaning motor 805 for driving the roller brush 804 to rotate is fixedly installed on the outside. The roller brush 804 is surrounded by bristles, and the bristles are in contact with the surface of the winding guide section. The two ends of the roller brush 804 are coaxially rotatably connected. There is an abutment plate 806, the outer edge of which is always in contact with the outer ring of the roller blind 301 wound on the take-up drum 404; a clamping spring 807 is sleeved on the outside of the guide rod 801, the two ends of the clamping spring 807 are respectively in contact with the support frame 104 and the cleaning frame 803, which is used to provide an elastic thrust that keeps the abutment plate 806 pressing the outer ring of the roller blind 301, so that the position of the roller brush 804 can be adaptively translated and adjusted according to the change of the winding diameter of the take-up drum 404.

[0088] As the roller shutter 301 continues to roll onto the take-up drum 404, the total diameter of the outer ring of the take-up drum 404 will continue to increase, causing the spatial position and tilt angle of the aforementioned take-up guide section to be in a continuous dynamic change. If an external cleaning component 8 with a fixed spatial position is used, its bristles will either be unable to contact the surface of the roller shutter 301 due to the distance being too far in the early stage of take-up, or they will be jammed and crushed by the increasingly thick drum in the later stage of take-up, making it impossible to guarantee stable cleaning throughout the process. If electronic sensors and servo motors are used to track the take-up diameter, the complexity of electrical control and manufacturing costs will be greatly increased, and it will be difficult to adapt to high humidity and corrosive environments.

[0089] In this embodiment, by setting a guide rod 801, a cleaning frame 803, and a clamping spring 807 sleeved on the outside of the guide rod 801, an elastic thrust is provided to the roller brush 804 to always press against the outer ring of the roller shutter 301. This allows the relative position of the roller brush 804 to adaptively shift backward or forward according to the real-time change of the winding diameter of the take-up drum 404. This ensures that the bristles always contact the surface of the take-up guide section at a constant depth throughout the entire take-up or unwinding process, avoiding the physical interference problem of fixed bristles not cleaning properly or being jammed and crushed.

[0090] When the external cleaning component 8 is working, the cleaning motor 805 starts and drives the roller brush 804 and brush bristles inside the cleaning frame 803 to rotate at high speed. At the same time, the clamping spring 807 sleeved on the outside of the guide rod 801 is compressed, and its elastic force pushes the cleaning frame 803 to slide along the guide rod 801 toward the take-up drum 404 until the outer edge of the abutment plate 806 coaxially mounted at both ends of the roller brush 804 abuts against the outer ring surface of the rolled-up curtain 301 on the take-up drum 404. At this time, the rotating bristles contact the surface of the take-up guide section at a preset interference depth to sweep away dust.

[0091] As the dissection table opens and the roller shutter 301 is continuously wound into the take-up drum 404, the winding diameter on the take-up drum 404 gradually becomes thicker. The thicker outer ring of the roller shutter 301 directly pushes against the abutment plate 806, forcing the abutment plate 806 to drive the roller brush 804, cleaning frame 803, and guide rod 801 to move outward as a whole, and further compress the clamping spring 807. As the dissection table closes and the roller shutter 301 is continuously released, the diameter of the take-up drum 404 gradually becomes thinner. The clamping spring 807 releases its elasticity, pushing the cleaning frame 803 and the abutment plate 806 to move inward along with the thinner drum. Throughout the dynamic tracking process, since the abutment plate 806 and the roller brush 804 are coaxially arranged, the normal distance from the center of the two to the surface of the roller shutter 301 is physically locked. Therefore, no matter how the diameter changes, the cleaning depth of the brush bristles remains absolutely constant. Furthermore, since the abutment plate 806 is rotatably connected, it can roll freely with the movement of the roller shutter 301 when it abuts the outer ring of the roller shutter 301, avoiding hard scraping friction.

[0092] like Figure 4 , Figure 9 and Figure 11 As shown, preferably, the two pilot sections 302 are provided with a stepped staggered overlapping structure at the junction where they close towards the middle of the housing 1; one of the pilot sections 302 has an upper overlapping step 303 extending forward on its end face, and the other pilot section 302 has a lower overlapping step 304 extending forward on its end face.

[0093] During the process of the double-opening roller shutter 301 closing towards the center, if the two pilot parts 302 adopt a flat end-to-end connection method, there will inevitably be a straight splicing gap between them. The liquid and fine dust remaining on the dissection table can easily seep directly into the preservative storage box 102 below through this gap, and the volatile odor inside the preservative box will also overflow outward through this gap.

[0094] In this embodiment, by setting a stepped staggered overlapping structure, one pilot part 302 has an upper overlapping step 303 and the other pilot part 302 has a lower overlapping step 304, transforming the originally straight splicing gap into a tortuous stepped seam path. This blocks the direct physical channel for liquid and small debris to seep vertically downwards, improving the isolation and sealing performance at the middle confluence of the double-opening tabletops. When closed, the upper overlapping step 303 and the lower overlapping step 304 press against each other, achieving staggered sealing while ensuring that the top surfaces of the two pilot parts 302 are on the same horizontal plane. This meets the requirement for overall surface flatness when the equipment is used as a teaching tabletop, avoiding interference caused by protruding seams to writing or placing utensils.

[0095] like Figure 10 As shown, preferably, the bottom inner periphery edge of the annular collection frame 701 is provided with a downwardly flared guide surface 702; the guide surface 702 is a transition rounded corner.

[0096] During the process of the lifting platform 601 rising from bottom to top and engaging with the annular collection frame 701, due to machining and assembly errors or slight vibrations and deviations during operation, the side wall of the lifting platform 601 and the inner wall of the annular collection frame 701 are prone to interference and collision, causing the lifting platform 601 to fail to smoothly insert and lift the collection frame, or even causing rigid collisions that jam the equipment.

[0097] In this embodiment, by setting a downwardly flared guide surface 702 on the bottom inner periphery edge of the annular collection frame 701, the upward vertical thrust of the lifting platform 601 is converted into a horizontal component force that pushes the collection frame to make radial fine adjustments by utilizing the inclined guide effect of the transition rounded corner. This achieves adaptive centering guidance between the lifting platform 601 and the annular collection frame 701 at the moment of engagement, avoids mechanical collision and jamming when the components are joined, and improves the smoothness of equipment operation.

[0098] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A wingspan-type double-opening dissection table, comprising a housing (1), characterized in that, Also includes: A preservative storage box (102) is detachably connected to the inside of the box body (1), and a guide groove (101) is formed between the outer side wall of the preservative storage box (102) and the opening frame of the box body (1). The double-opening cover assembly (3) includes two roller blinds (301) symmetrically arranged on both sides of the upper opening of the box (1), with the ends of the two roller blinds (301) close to each other forming a pilot part (302), and a drive mechanism (4) for driving the roller blinds (301) to move along the guide groove (101) to the middle of the box (1) to close or to retract to both ends to open. The lifting assembly (6) is disposed in the preservative storage box (102) and includes a lifting platform (601) and a lifting drive structure (602) for driving the lifting platform (601) to lift. The collection assembly includes a placement rack (103) disposed on the inner wall of the box (1) near the upper opening, and an annular collection frame (701). The annular collection frame (701) is wrapped around the outer periphery of the lifting platform (601). When the lifting platform (601) is raised, the annular collection frame (701) is supported by the lifting platform (601) to be in working condition. When the lifting platform (601) descends below the placement rack (103), the annular collection frame (701) is stopped by the placement rack (103) and supported at the upper opening of the box (1); The self-cleaning component (2) is disposed on the two pilot sections (302) and configured to scrape dirt and debris at the guide groove (101) into the annular collection frame (701) supported by the placement frame (103) during the closing of the two roller shutters (301); The self-cleaning assembly (2) includes a swing arm (201) hinged to the pilot section (302) and a slag pusher (202) fixedly connected to the end of the swing arm (201); the pilot section (302) is fixedly provided with a spring hanger (203) and two limiting posts (204) for limiting the swing range of the swing arm (201) to define the working position and the retracted position of the slag pusher (202) abutting the guide groove (101); the swing arm (201) and the spring hanger (203) are fixedly connected to the pilot section (302 ... A tension spring (205) is connected between the 03 and the swing arm (201). The extension axis of the tension spring (205) can cross the hinge center of the swing arm (201) when the swing arm (201) swings, so that the push block (202) can be stably maintained in the working position or the avoidance and retraction position by the elastic force; a reset frame (208) is fixedly connected inside the box (1), which is configured to push the swing arm (201) to spring back to the working position when the roller shutter (301) is retracted and opened to the limit position; The self-cleaning components (2) on both sides adopt an asymmetrical timing avoidance structure; a force-bearing column (206) is fixedly connected to the top of the slag-pushing block (202) or swing arm (201) of the self-cleaning component (2) on one side, and a trigger stop (209) corresponding to the force-bearing column (206) is fixedly connected inside the housing (1); during the process of the two roller shutters (301) closing towards the middle of the housing (1), the force-bearing column (206) contacts the trigger stop (209) first, forcing the slag-pushing block (202) on that side to switch to the avoidance retraction position first; after the slag-pushing block (202) of the self-cleaning component (2) on the other side continues to move forward and sweeps through the closed center area, it abuts against the end face of the pilot part (302) on the opposite side and is pressured to switch to the avoidance retraction position.

2. The wing-shaped double-opening dissection table according to claim 1, characterized in that: The drive mechanism (4) includes a winding motor (403), a winding frame (401), and a winding drum (404) respectively corresponding to the two roller blinds (301). The winding frame (401) is fixedly connected inside the housing (1). The winding drum (404) is rotatably connected to the winding frame (401) and coaxially fixedly connected to the output shaft of the corresponding winding motor (403). The tail ends of the two roller blinds (301) are respectively wound on the corresponding winding drum (404). A central fixed shaft (410) is fixedly connected inside the housing (1). A winding reel (405) with a cavity is rotatably connected to the outside of the central fixed shaft (410). A coil spring (406) is provided inside the cavity. The two ends of the coil spring (406) are fixedly connected to the winding reel (405) and the central fixed shaft (410) respectively; two slings (407) are wound around the outside of the winding reel (405), and movable pulleys (408) are rotatably connected to the two pilot parts (302) respectively. Fixed pulleys (409) are rotatably connected to the corresponding sides of the inside of the housing (1); the ends of the two slings (407) away from the winding reel (405) extend to both sides respectively, pass around the fixed pulleys (409) and movable pulleys (408) on the corresponding sides in sequence, and are fixedly connected to the inside of the housing (1); the movable pulleys (408) located on different pilot parts (302) are staggered in the horizontal direction.

3. The wingspan double-opening dissection table according to claim 2, characterized in that: The drive mechanism (4) also includes a speed-stabilizing damping assembly (5). An eccentric wheel (501) is coaxially fixedly connected to the side of the winding reel (405). A connecting rod (502) is hinged to the part of the eccentric wheel (501) that is off-center from the rotation center. A damping cylinder (503) is fixedly installed inside the housing (1). A piston (504) is slidably and sealed inside the damping cylinder (503). The end of the connecting rod (502) away from the eccentric wheel (501) extends into the inside of the damping cylinder (503) and is hinged to the piston (504). A flow-limiting pipe (505) communicating with the external environment is provided on the damping cylinder (503). A flow regulating valve (506) is installed on the flow-limiting pipe (505).

4. The wingspan-type double-opening dissection table according to claim 3, characterized in that: A guide roller (402) is rotatably connected to the take-up frame (401), the top tangent of which is flush with the bottom surface of the guide groove (101); the take-up drum (404) is located diagonally below the guide roller (402), so that the roller shutter (301) forms a downwardly inclined take-up guide section as it passes around the guide roller (402) and extends to the take-up drum (404); a support frame (104) is fixedly installed inside the housing (1), and an external cleaning component (8) for cleaning debris from the surface of the take-up guide section is provided on the support frame (104); a collection box (207) is fixedly connected inside the housing (1) below the take-up frame (401).

5. A wingspan-type double-opening dissection table according to claim 4, characterized in that: The external cleaning assembly (8) includes a guide rod (801) slidably passing through the support frame (104). One end of the guide rod (801) is fixedly provided with a limiting head (802), and the other end is fixedly connected to a cleaning frame (803). A roller brush (804) is rotatably connected inside the cleaning frame (803), and a cleaning motor (805) for driving the roller brush (804) to rotate is fixedly installed on the outside. The roller brush (804) is surrounded by bristles, and the bristles are in contact with the surface of the winding guide section. Both ends of the roller brush (804) are coaxially rotatably connected to abutment discs (8). 06), the outer edge of the abutment plate (806) is always in contact with the outer ring of the roller blind (301) wound on the take-up drum (404); the guide rod (801) is fitted with a clamping spring (807), the two ends of the clamping spring (807) are respectively in contact with the support frame (104) and the cleaning frame (803), which are used to provide an elastic thrust that keeps the abutment plate (806) pressing the outer ring of the roller blind (301) so that the position of the roller brush (804) can be adaptively translated and adjusted according to the change of the winding diameter of the take-up drum (404).

6. A wingspan-type double-opening dissection table according to claim 5, characterized in that: The two pilot sections (302) are provided with a stepped staggered overlapping structure at the junction where they close towards the middle of the box (1); one of the pilot sections (302) has an upper overlapping step (303) extending forward on its end face, and the other pilot section (302) has a lower overlapping step (304) extending forward on its end face.

7. A wingspan-type double-opening dissection table according to claim 6, characterized in that: The bottom inner periphery edge of the annular collection frame (701) is provided with a downwardly flared guide surface (702); the guide surface (702) is a transition rounded corner.

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