Sliding door structure and analytical instrument

Abstract

The utility model provides a sliding door structure and analytical instrument.The sliding door structure comprises a door plate, two guide rails and a brake unit, guide shaft assemblies are arranged on the two opposite side portions of the door plate in the first direction, and the door plate is located between the two guide rails in the first direction; a guide groove is formed in the side, facing the guide shaft assembly, of the guide rail, the guide groove is slidably connected with the guide shaft assembly in a matched mode, the acting end of the brake unit abuts against the door plate, and the door plate is limited to slide along the guide groove under the action of gravity. The analytical instrument is provided with the sliding door structure, and the sliding door structure has the advantages that the door is convenient to open and close, and transverse space is not occupied when the door is opened and closed.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a sliding door structure and an analytical instrument provided with the sliding door structure. Background Art

[0002] Existing analytical instruments such as chemiluminescence analyzers and biochemical analyzers are equipped with sample management modules, which function as storage and turnover units for test samples. However, the door structure of current sample management modules is generally a rotating double-opening type or a rotating single-opening type. In limited spaces such as laboratories or inspection rooms, the above door opening forms will occupy a large amount of space resources and are prone to problems such as inconvenience in opening the door. Summary of the invention

[0003] In order to solve the above problems, the main purpose of the utility model is to provide a sliding door structure which is convenient for opening and closing the door and does not need to occupy a horizontal space when opening and closing the door.

[0004] Another object of the utility model is to provide an analytical instrument provided with the above sliding door structure.

[0005] In order to achieve the main purpose of the utility model, the utility model provides a sliding door structure, which includes a door panel, two guide rails and a brake unit. In a first direction, guide shaft assemblies are arranged on two opposite sides of the door panel. In the first direction, the door panel is located between the two guide rails. A guide groove is formed on one side of the guide rail facing the guide shaft assembly. The guide groove is slidably connected to the guide shaft assembly. The active end of the brake unit abuts against the door panel to limit the door panel from sliding along the guide groove under the action of gravity.

[0006] As can be seen from the above, through the design of the sliding door structure, the door panel can be opened and closed in a sliding manner, which solves the problem that the traditional door panel must occupy a large lateral avoidance space when opening and closing by rotating double opening or rotating single opening. Therefore, the sliding door structure can utilize the space more effectively and does not occupy the external space of the equipment equipped with the sliding door structure, thereby saving site resources; furthermore, the user does not need to avoid sideways during the opening and closing process of the door panel; in addition, the braking unit can exert a certain damping effect on the door panel to avoid the door panel from suddenly falling due to the influence of gravity when the door panel is vertically lifted and opened and closed, thereby ensuring the reliability and safety of the door panel during and after opening and closing.

[0007] A preferred solution is that the guide shaft assembly includes a guide shaft, a pressure plate, a first compression spring and a screw, a limiting portion is provided on the guide shaft, and the door panel is provided with a guide shaft mounting hole and a pressure plate mounting groove; the first compression spring and the guide shaft portion are installed in the guide shaft mounting hole, the first compression spring is sleeved on the guide shaft, and the two ends of the first compression spring are respectively abutted against the bottom of the guide shaft mounting hole and the limiting portion; the pressure plate has an avoidance hole, and the pressure plate is sleeved on the guide shaft through the avoidance hole, abutting against the side of the limiting portion away from the first compression spring, and the guide shaft portion protrudes from the pressure plate; the pressure plate is provided with a pressure plate mounting hole, and the pressure plate mounting hole is matched with the pressure plate positioning hole in the pressure plate mounting groove, and the screw passes through the pressure plate mounting hole and the pressure plate positioning hole in sequence to fix the pressure plate in the pressure plate mounting groove.

[0008] As can be seen from the above, by configuring the guide shaft assembly to include a guide shaft, a pressure plate and a first pressure spring, assembly and disassembly between the door panel and the guide track is made simpler and more convenient.

[0009] Another preferred solution is that a guide groove is arranged corresponding to a group of guide shaft assemblies; the guide groove has a straight section and a bent section, along the opening direction of the door panel, the bent section is located at the upstream end of the straight section, the straight section extends along the second direction, and the bent section extends from the straight section to a direction away from the braking unit into a bent shape.

[0010] As can be seen from the above, the setting of the bending section enables the door panel to move outward a certain distance when it moves toward the closed position, and when the door panel is in the closed position, the door panel can be flush with the outer side of the body of the device equipped with the sliding door structure, thereby improving the overall aesthetics of the device.

[0011] A further solution is that there are two groups of guide shaft assemblies on each side of the door panel, and the two groups of guide shaft assemblies on the same side correspond to two guide grooves on a guide track respectively; the two guide grooves are staggered and distributed on the guide track in sequence along the vertical direction.

[0012] As can be seen from the above, the above design enables the sliding of the door panel to be more stable, and can play a certain limiting role on the door panel to prevent the door panel from deflecting during movement.

[0013] Another preferred solution is that the braking unit includes a fixed seat, a abutment and an elastic member, the elastic member is located between the fixed seat and the abutment, the first end of the abutment is elastically connected to the fixed seat through the elastic member, the second end of the abutment abuts against the door panel, and the abutment limits the door panel from sliding along the guide groove under the action of gravity.

[0014] As can be seen from the above, through the design of the brake unit, the abutment can apply a certain pressure to the door panel, thereby preventing the door panel from falling suddenly during the opening and closing process, ensuring the reliability and safety of the door panel during and after opening and closing.

[0015] A further solution is that the braking unit also includes a guide rod, which is slidably connected to the fixed seat and fixedly connected to the abutment, or the guide rod is fixedly connected to the fixed seat and slidably connected to the abutment; the elastic member is a compression spring or a tension spring, and the elastic member is sleeved on the guide rod to push the abutment to abut the door panel.

[0016] As can be seen from the above, the structure of the brake unit can be changed and designed according to the use requirements, so that the brake unit can be suitable for different installation environments.

[0017] A further solution is that the abutment member includes a connecting seat and a pressure wheel, the pressure wheel is rotatably mounted on the connecting seat around its own rotation axis, the pressure wheel abuts against the door panel, and the rotation axis of the pressure wheel is parallel to the door panel.

[0018] It can be seen from the above that the above design can reduce the resistance during the opening and closing process of the door panel to a certain extent, making the opening and closing operation of the door panel easier and reducing scratches on the door panel due to translational friction.

[0019] A further solution is that the guide rod is fixedly connected to the fixing seat; the elastic member is a compression spring, the compression spring is sleeved on the guide rod, the connecting seat is provided with a guide hole, the guide rod passes through the guide hole, and the guide rod and the connecting seat are slidably connected.

[0020] A further solution is that the guide rod is slidably connected to the fixed seat along its own extension direction, and the first end of the guide rod is fixedly connected to the connecting seat; when the elastic member is a compression spring, the compression spring abuts between the fixed seat and the connecting seat, and when the elastic member is a tension spring, the tension spring and the fixed seat are sequentially mounted on the guide rod, and the fixed seat is located between the tension spring and the connecting seat.

[0021] In order to achieve another purpose of the utility model, the utility model provides an analytical instrument, including a fuselage, the fuselage having a cabin, wherein the analytical instrument also includes the above-mentioned sliding door structure, and the sliding door structure is installed on the fuselage; when the door panel is in an open position, the door panel releases the cover of the hatch of the cabin, and when the door panel is in a closed position, the door panel covers the hatch.

[0022] As can be seen from the above, the analytical instrument provided with the above-mentioned sliding door structure occupies a small space, makes it more convenient to operate the door panel to open and close the cabin, and there is no need for the user to move sideways to avoid the door panel during the opening and closing process of the door panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a reference diagram of the use state of the door panel of the first embodiment of the analytical instrument of the utility model in a closed position.

[0024] Figure 2 This is a reference diagram of the use state of the first embodiment of the analytical instrument of the utility model, in which the door panel is in an open position.

[0025] Figure 3 It is a schematic diagram of the installation position of the brake unit in the first embodiment of the analytical instrument of the utility model.

[0026] Figure 4 It is an exploded view of the door panel and related mounting components in the first embodiment of the analytical instrument of the utility model.

[0027] Figure 5 yes Figure 4 Enlarged view of point A in the middle.

[0028] Figure 6 It is a structural diagram of the guide track of the first embodiment of the analytical instrument of the utility model.

[0029] Figure 7 It is a structural diagram of a brake unit of the first embodiment of the analytical instrument of the utility model.

[0030] Figure 8 It is a cross-sectional view of the local structure of the first embodiment of the analytical instrument of the utility model.

[0031] Reference numerals:

[0032] 100. Analytical instrument; 101. Fuselage; 1011. Cabin; 102. Sliding door structure; 1. Door panel; 11. Guide shaft mounting hole; 12. Pressure plate mounting groove; 2. Guide shaft assembly; 21. Guide shaft; 211. Limiting portion; 22. Pressure plate; 221. Avoidance hole; 23. First compression spring; 3. Guide rail; 31. Guide groove; 311. Straight section; 312. Bending section; 32. Connecting hole; 4. Braking unit; 41. Fixed seat; 42. Guide rod; 43. Abutment; 431. Connecting seat; 432. Pressure wheel; 44. Elastic member. DETAILED DESCRIPTION

[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0034] Analytical Instrument First Embodiment

[0035] Reference Figures 1 to 3 The analytical instrument 100 includes a fuselage 101 and a sliding door structure 102. The fuselage 101 has a cabin 1011, which can be used for storage and turnover of test samples. The hatch of the cabin 1011 is preferably formed on the front side of the fuselage 101. The sliding door structure 102 is installed on the fuselage 101, and the sliding door structure 102 is used to open or close the hatch of the cabin 1011. When the sliding door structure 102 closes the hatch of the cabin 1011, the sliding door structure 102 covers the cabin 1011, so that the cabin 1011 forms a relatively closed space to protect the test samples.

[0036] Combination Figures 2 to 5The sliding door structure 102 includes a door panel 1, a guide shaft assembly 2, a guide track 3 and a brake unit 4. In the first direction X, the guide shaft assembly 2 is disposed on two opposite sides of the door panel 1.

[0037] In this embodiment, the guide shaft assembly 2 includes a guide shaft 21, a pressure plate 22 and a first compression spring 23. The guide shaft 21 extends along the first direction X, and a limiting portion 211 is provided on the guide shaft 21. Accordingly, a guide shaft mounting hole 11 and a pressure plate mounting groove 12 are formed on each side of the door panel 1. The guide shaft mounting hole 11 is recessed from the side of the door panel 1 to the inside of the door panel 1 in the first direction X. The pressure plate mounting groove 12 is located at the entrance of the guide shaft mounting hole 11 and is arranged with the center point of the entrance of the guide shaft mounting hole 11 as the center. The pressure plate mounting groove 12 is recessed from the side of the door panel 1 to the inside of the door panel 1 in the first direction X. During installation, a part of the guide shaft 21, the limiting portion 211 and the first compression spring 23 are all located in the guide shaft mounting hole 11. The first compression spring 23 is used to force the guide shaft 21 to move away from the bottom of the guide shaft mounting hole 11; preferably, in this embodiment, the first compression spring 23 is mounted on the guide shaft 21, and the two ends of the first compression spring 23 are respectively abutted against the bottom of the guide shaft mounting hole 11 and the limit portion 211; of course, as another optional scheme, in another embodiment, the first compression spring 23 may also abut between the bottom of the guide shaft mounting hole 11 and the end of the guide shaft 21.

[0038] The pressing plate 22 has an avoidance hole 221. The pressing plate 22 is installed in the pressing plate installation groove 12 on the door panel 1, so that the pressing plate 22 covers the entrance of the guide shaft installation hole 11. At this time, the limiting portion 211 abuts against the inner side of the pressing plate 22 (i.e., the side of the pressing plate 22 facing the guide shaft installation hole 11) to prevent the guide shaft 21 from being separated from the guide shaft installation hole 11. The guide shaft 21 can slide relative to the guide shaft installation hole 11 in the first direction X. Part of the guide shaft 21 (the side away from the guide shaft installation hole 11 with the limiting portion 211 as the boundary) can pass through the avoidance hole 221 on the pressing plate 22, so that part of the guide shaft 21 can pass through the avoidance hole 221 to the outside of the door panel 1. Through the design of the guide shaft assembly 2, the disassembly and assembly between the door panel 1 and the guide rail 3 is simpler and more convenient; and, under the action of the first compression spring 23, the guide shaft 21 and the end extending out of the door panel 1 can penetrate into the guide groove 31 on the guide rail 3 and abut against the bottom of the guide groove 31, thereby preventing the guide shaft 21 from detaching from the guide rail 3 and better preventing the door panel 1 from moving in the first direction X.

[0039] It should be noted that, as another optional solution, in one embodiment, the design of the pressure plate mounting groove 12 on the door panel 1 can be cancelled, and the guide shaft assembly 2 no longer includes the guide shaft 21, the pressure plate 22 and the first compression spring 23. Instead, the guide shaft assembly 2 is configured as a pin shaft, a part of the pin shaft is fixedly installed in the guide shaft mounting hole 11, and the remaining part of the pin shaft is located outside the door panel 1.

[0040] Combination Figure 6 There are two guide rails 3, and the door panel 1 is arranged between the two guide rails 3 along the first direction X. The guide shaft assemblies 2 on both sides of the door panel 1 are preferably arranged in a mirror-symmetrical manner, and the two guide rails 3 are arranged in a mirror-symmetrical manner. The two guide rails 3 correspond one-to-one to the two side portions of the door panel 1, that is, one guide rail 3 cooperates with the guide shaft assembly 2 on a corresponding side portion of the door panel 1.

[0041] Specifically, a guide groove 31 is formed on the side of the guide rail 3 facing the guide shaft assembly 2, and the guide groove 31 is slidably matched with the corresponding guide shaft assembly 2, so that the door panel 1 can slide along the guide groove 31; wherein, along the guide groove 31, the door panel 1 has an open position (such as Figure 2 as shown) and the closed position (as Figure 1 As shown), when the door panel 1 is in the open position, the door panel 1 releases the cover on the hatch of the cabin 1011, and when the door panel 1 is in the closed position, the door panel 1 covers the hatch.

[0042] Preferably, the guide groove 31 has a straight section 311 and a bent section 312, the straight section 311 extends along the second direction Z (the second direction Z is perpendicular to the first direction X), and along the opening direction of the door panel 1, the bent section 312 is located at the upstream end of the straight section 311. The bent section 312 extends obliquely from the straight section 311 to the side facing away from the cabin 1011; the bent section design enables the door panel 1 to be in the open position and embedded inwardly into the inner side of the fuselage 101; when closed, the door panel 1 is flush with the surface of the fuselage 101. Specifically, when the door panel 1 moves to the closed position, the door panel 1 can move outward a certain distance (i.e., move toward the front panel of the fuselage 101) through the bent section, and when the door panel 1 is in the closed position, the door panel 1 can be flush with the outer side of the front panel of the fuselage 101, thereby improving the overall aesthetics of the device.

[0043] Furthermore, there is preferably an arc-shaped transition between the bending section 312 and the straight section 311 , so that the guide shaft 21 can slide smoothly between the straight section 311 and the bending section 312 .

[0044] Further, the number of guide grooves 31 on each guide rail 3 is two, and the two guide grooves 31 are arranged along the length direction of the guide rail 3, and the two guide grooves 31 have the same trajectory, and correspond to the guide shaft assembly 2 on the same side of the door panel 1. Preferably, the two guide grooves 31 on the guide rail 3 are staggered in the second direction, that is, the straight segments 311 of the two guide grooves 31 are not on the same straight line, and the corresponding guide shaft assemblies 2 are staggered in the direction Z. This design can be more conducive to the miniaturization design of the guide rail 3, and can also improve the stability and smoothness of the sliding of the door panel 1 to a certain extent. Correspondingly, the number of guide shaft assemblies 2 on each side of the door panel 1 is two groups, and the two groups of guide shaft assemblies 2 on the same side correspond one by one to the two guide grooves 31 on the corresponding guide rail 3. This design can make the sliding of the door panel 1 more stable, and can play a certain limiting role on the door panel 1 to prevent the deflection of the door panel 1 during the movement, and the sealing state of the door panel 1 is better after closing.

[0045] In addition, in the first direction X, the two guide rails 3 are respectively located on both sides of the hatch of the cabin 1011 , and the two guide rails 3 are fixedly connected to the fuselage 101 .

[0046] Specifically, a connecting hole 32 is provided on the side of the guide rail 3. The setting design of the connecting hole 32 makes the disassembly and assembly between the guide rail 3 and the fuselage 101 convenient and easy to operate, and can prevent the fasteners (such as bolts) between the guide rail 3 and the fuselage 101 from interfering with or hindering the sliding of the door panel 1.

[0047] Combination Figure 7 and Figure 8 , the brake unit 4 is mounted on the fuselage 101, and the brake unit 4 is preferably located on the inner side of the door panel 1, and in combination with the above-mentioned embedded door panel opening state, the overall aesthetics of the analytical instrument 100 can be better improved. As another optional solution, the brake unit 4 is also arranged on the outer side of the door panel 1 (that is, installed on the outer side of the fuselage 101). The active end of the brake unit 4 abuts against the door panel 1 to limit the sliding of the door panel 1 along the guide groove 31 under the action of gravity. It can be seen that the brake unit 4 can exert a certain damping effect on the door panel 1 to prevent the door panel 1 from falling suddenly due to the influence of gravity when the door panel 1 is vertically lifted and opened and closed, thereby ensuring the reliability and safety of the door panel 1 during and after the opening and closing process.

[0048] Preferably, in this embodiment, the number of the brake units 4 is two, and the two brake units 4 are preferably distributed along the first direction X. The brake unit 4 includes a fixed seat 41, a guide rod 42, an abutment 43 and an elastic member 44; the fixed seat 41 is fixedly connected to the fuselage 101; the guide rod 42 is slidably connected to the fixed seat 41 along its own extension direction (in this embodiment, the extension direction of the guide rod 42 is parallel to the thickness direction Y of the door panel 1); the abutment 43 is connected to the guide rod 42, and the abutment 43 abuts against the door panel 1, and the elastic member 44 is used to force the guide rod 42 and the abutment 43 to move toward the door panel 1 in the extension direction, so that the abutment 43 can apply a certain pressure to the door panel 1, thereby preventing the door panel 1 from falling suddenly during the opening and closing process, and ensuring the reliability and safety of the door panel 1 during and after the opening and closing process.

[0049] Further, in the present embodiment, the abutment member 43 comprises a connection seat 431 and a pressure wheel 432, the connection seat 431 is slidably connected to the guide rod 42, the pressure wheel 432 is rotatably mounted on the connection seat 431 around its own rotation axis, the pressure wheel 432 abuts against the door panel 1, the rotation axis is perpendicular to the extension direction of the guide rod 42, and the rotation axis is parallel to the first direction X; the elastic member 44 is a second compression spring, the second compression spring is sleeved on the guide rod 42, and the second compression spring abuts between the fixed seat 41 and the connection seat 431. Of course, as another optional solution, the elastic member 44 can also be changed from the second compression spring to a tension spring, the tension spring is connected between the fixed seat 41 and the guide rod 42, in the extension direction of the guide rod 42, the fixed seat 41 is located between the tension spring and the connection seat 431, the tension spring contraction force pulls the end of the guide rod 42 away from the connection seat 431 toward the fixed seat 41, and the guide rod 42 as a whole drives the connection seat 431 to move toward the door panel 1. The above design enables the brake unit 4 to cooperate with the bending section 312 to limit the door panel 1 in the closed position and prevent it from falling suddenly, so as to better ensure that the door panel 1 can reliably cover the cabin 1011, and when the door panel 1 is in the closed position, the door panel 1 will not be affected by gravity and move downward, thereby preventing the cabin 1011 of the fuselage 101 from being opened when it is not needed; it can also further ensure the airtightness of the sealed cabin 1011. At the same time, the abutment 43 is set as a combination of a connecting seat 431 and a pressure wheel 432, which can also reduce the resistance of the door panel 1 during the opening and closing process to a certain extent, making the opening and closing operation of the door panel 1 easier and reducing the scratches on the door panel due to translation friction.

[0050] It should be noted that, as another optional solution, the abutment member 43 may also be a component without the pressure wheel 432, such as a rubber member. This design enables the door panel 1 to better hover at any position without being operated by external forces, such as allowing the door panel 1 to be in a semi-open state.

[0051] In addition, in this embodiment, the sliding door structure 102 further includes a handle 5, which is installed on the outside of the door panel 1. The arrangement of the handle 5 enables the user to control the movement of the door panel 1 more conveniently, reliably and safely. As another optional solution, the design of the handle 5 can also be eliminated, and a hand grip is formed on the door panel 1, which is recessed from the outside of the door panel 1 to the inside of the door panel 1. The hand grip also enables the user to control the movement of the door panel 1 more conveniently, reliably and safely. Furthermore, in this embodiment, the door panel 1 is configured to be opened and closed in a lifting manner.

[0052] The opening and closing operation of the door panel 1 is briefly described below:

[0053] When the cabin 1011 of the fuselage 101 needs to be opened, the user controls the door panel 1 to move toward the open position (i.e., the door panel 1 moves toward the bottom of the fuselage 101) through the handle 5. In the process of the door panel 1 moving toward the open position, the door panel 1 first moves along the bending section 312 of the guide groove 31 of the guide track 3 through the guide shaft assembly 2, so that the door panel 1 moves downward and tilted inwardly of the fuselage 101 by a small distance during this process, so that the door panel 1 is retracted into the fuselage 101 relative to the front side panel of the fuselage 101; when the guide shaft assembly 2 of the door panel 1 moves from the bending section 312 of the guide groove 31 to the straight section 311, the door panel 1 moves toward the bottom of the fuselage 101 in the second direction Z until the door panel 1 moves to the open position, so that the cabin 1011 is fully opened.

[0054] When the cabin 1011 of the fuselage 101 needs to be closed, the user controls the door panel 1 to move toward the closed position (i.e., the door panel 1 moves toward the top of the fuselage 101) through the handle 5. In the process of the door panel 1 moving toward the closed position, the door panel 1 first moves toward the top of the fuselage 101 in the second direction Z along the straight section 311 of the guide groove 31 of the guide track 3 through the guide shaft assembly 2; when the guide shaft assembly 2 of the door panel 1 moves from the straight section 311 of the guide groove 31 to the bent section 312, the door panel 1 moves upward and tilted toward the outside of the fuselage 101 by a small distance, so that the door panel 1 gradually becomes flush with the front side panel of the fuselage 101; when the door panel 1 moves to the closed position, the cabin 1011 is completely covered, and the door panel 1 becomes flush with the front side panel of the fuselage 101.

[0055] From the above, it can be seen that, through the design of the sliding door structure 102, the door panel 1 can be opened and closed in a sliding manner, which solves the problem that the traditional door panel 1 must occupy a large lateral avoidance space when opening and closing by rotating double opening or rotating single opening, thereby saving site resources; furthermore, the user does not need to avoid sideways during the opening and closing process of the door panel 1; and the analysis instrument 100, by setting the sliding door structure 102, requires less space for itself and makes it more convenient to operate the door panel 1 to open and close the cabin 1011.

[0056] Second embodiment of the analytical instrument

[0057] The difference between this embodiment and the first embodiment of the analytical instrument is that, in this embodiment:

[0058] The sliding door structure further includes a buffer unit, which is mounted on the fuselage; along the opening direction of the door panel, the buffer unit is located at the downstream end of the door panel; when the door panel is in the open position, the buffer unit abuts against the door panel. Preferably, the buffer unit is a damping buffer or a buffer pad. The buffer unit can prevent the door panel from hard collision with the end of the guide groove and / or the fuselage of the device provided with the sliding door structure when it moves to the open position, thereby protecting the door panel, the analytical instrument, and the items (such as test samples) stored in the analytical instrument.

[0059] Finally, it should be emphasized that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Sliding door structure, It is characterized in that include: The door panel has guide shaft assemblies disposed on two opposite sides of the door panel in a first direction; Two guide rails, in the first direction, the door panel is located between the two guide rails, a guide groove is formed on one side of the guide rail facing the guide shaft assembly, and the guide groove is slidably matched with the guide shaft assembly; A brake unit, wherein an action end of the brake unit abuts against the door panel to limit the door panel from sliding along the guide groove under the action of gravity.

2. The sliding door structure according to claim 1, Features: The guide shaft assembly includes a guide shaft, a pressure plate, a first compression spring and a screw. A limiting portion is provided on the guide shaft, and a guide shaft mounting hole and a pressure plate mounting groove are provided on the door panel. The first compression spring and the guide shaft portion are installed in the guide shaft installation hole, the first compression spring is sleeved on the guide shaft, and the two ends of the first compression spring are respectively in contact with the bottom of the guide shaft installation hole and the limiting portion; The pressing plate has an avoidance hole, the pressing plate is sleeved on the guide shaft through the avoidance hole, abuts against a side of the limiting portion away from the first compression spring, and the guide shaft partially protrudes from the pressing plate; The pressure plate is provided with a pressure plate mounting hole, and the pressure plate mounting hole is matched with the pressure plate positioning hole in the pressure plate mounting groove. The screw passes through the pressure plate mounting hole and the pressure plate positioning hole in sequence to fix the pressure plate in the pressure plate mounting groove.

3. The sliding door structure according to claim 1, Features: One of the guide grooves is arranged corresponding to one group of guide shaft assemblies; The guide groove has a straight section and a bent section. Along the opening direction of the door panel, the bent section is located at the upstream end of the straight section. The straight section extends along the second direction. The bent section extends from the straight section in a bent shape in a direction away from the brake unit.

4. The sliding door structure according to claim 3, Features: The number of the guide shaft assemblies on each side of the door panel is two groups, and the two groups of guide shaft assemblies on the same side correspond to the two guide grooves on one guide track respectively; The two guide grooves are staggered and distributed on the guide rail in sequence along the vertical direction.

5. The sliding door structure according to claim 1, Features: The braking unit includes a fixed seat, a contact piece and an elastic piece, wherein the elastic piece is located between the fixed seat and the contact piece, the first end of the contact piece is elastically connected to the fixed seat through the elastic piece, the second end of the contact piece is in contact with the door panel, and the contact piece limits the door panel from sliding along the guide groove under the action of gravity.

6. The sliding door structure according to claim 5, Features: The brake unit further comprises a guide rod, which is slidably connected to the fixing seat and fixedly connected to the abutment member, or The guide rod is fixedly connected to the fixing seat and slidably connected to the abutment member; The elastic member is a compression spring or a tension spring, and the elastic member is sleeved on the guide rod to push the abutment member to abut against the door panel.

7. The sliding door structure according to claim 6, Features: The abutment member comprises a connecting seat and a pressure wheel. The pressure wheel is rotatably mounted on the connecting seat around its own rotation axis. The pressure wheel abuts against the door panel, and the rotation axis of the pressure wheel is parallel to the door panel.

8. The sliding door structure according to claim 7, Features: The guide rod is fixedly connected to the fixing seat; The elastic member is the compression spring, which is sleeved on the guide rod. The connecting seat is provided with a guide hole, through which the guide rod passes, and the guide rod is slidably connected to the connecting seat.

9. The sliding door structure according to claim 7, Features: The guide rod is slidably connected to the fixing seat along its extension direction, and the first end of the guide rod is fixedly connected to the connecting seat; When the elastic member is the compression spring, the compression spring abuts between the fixing seat and the connecting seat. When the elastic member is the tension spring, the tension spring and the fixing seat are sequentially sleeved on the guide rod, and the fixing seat is located between the tension spring and the connecting seat.

10. An analytical instrument comprising a body having a compartment, Features: The analytical instrument further comprises a sliding door structure as claimed in any one of claims 1 to 9, wherein the sliding door structure is mounted on the body; When the door panel is in the open position, the door panel releases the cover of the hatch of the cabin, and when the door panel is in the closed position, the door panel covers the hatch.

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