A safety door interlocking device for a fluorescent immuno-chromatographic analyzer

Abstract

The application relates to the technical field of medical detection equipment, in particular to a safety door interlocking device for a fluorescent immunochromatographic analyzer, which comprises a rack, an upper guard plate, a lower guard plate, a door body, an opening door driving mechanism and an elastic reset mechanism. The rack comprises a support and a platform, the upper guard plate and the lower guard plate are arranged at intervals to form a door opening for inserting a reagent card, and the door body is slidably installed on the side wall surface of the support through a sliding rail. The opening door driving mechanism comprises a power source and a transmission assembly, the transmission assembly drives the door body to move from a closed position to an open position under the drive of the power source, and the transmission assembly releases the driving force transmission of the door body in the closing direction during the door closing process. The elastic reset mechanism is connected between the door body and the rack, stores elastic potential energy during the door opening process, and releases the elastic potential energy to drive the door body to close after the transmission assembly releases the driving force transmission. The force applied by the door body during the door closing process is only determined by the elastic restoring force of the elastic reset mechanism, is limited by the elastic coefficient, and the risk of pinching the user is reduced.

Description

Technical Field

[0001] This application relates to the field of medical testing equipment technology, specifically to a safety door interlock device for a fluorescence immunochromatographic analyzer. Background Technology

[0002] A fluorescence immunochromatographic analyzer is a point-of-care testing device used for in vitro diagnostics. During operation, a pre-loaded reagent card is inserted through an opening on the front panel into a slot on an internal incubation turntable for constant-temperature incubation, followed by fluorescence signal acquisition and analysis. Because the incubation turntable rotates continuously during operation, a safety door is typically installed at the opening on the front panel to prevent users from contacting the internal moving parts while the device is running.

[0003] Existing safety door solutions mainly fall into two categories: one is the manual opening and closing solution, which relies on the user to manually push and pull the door to complete the opening and closing action. This has a low degree of automation, and there is no linkage constraint between the opening and closing state of the door and the moving parts inside the equipment. The other is the motor-driven automatic door solution, which uses a motor to drive a belt or gear transmission mechanism to forcibly complete the opening and closing action of the door. However, during the process of the motor forcibly closing the door, the closing force applied by the door is continuous and constant. If the user's fingers are not removed from the doorway area in time after the reagent card loading operation, there is a safety risk of fingers being pinched by the door.

[0004] Based on the above, this application proposes a safety door interlock device for a fluorescence immunochromatographic analyzer, which can effectively solve the above problems. Summary of the Invention

[0005] To address the risk of user injury caused by forced closing of existing safety doors, this application proposes a safety door interlock device for a fluorescence immunochromatographic analyzer.

[0006] A safety door interlock device for a fluorescence immunochromatographic analyzer includes:

[0007] A frame, the frame including a support and a platform, the support and the platform being perpendicularly arranged and connected to each other;

[0008] The protective plate structure includes an upper protective plate and a lower protective plate. The upper protective plate is fixed to the surface of the platform and close to the edge of the support. The lower protective plate is fixed to the top of the support. The upper protective plate and the lower protective plate are spaced apart in the vertical direction, and an opening for inserting a reagent card is formed between the upper protective plate and the lower protective plate.

[0009] The door body is slidably mounted on the side wall of the support via a slide rail, and the door body has a closed position that covers the doorway and an open position that exposes the doorway;

[0010] A door opening drive mechanism, mounted on the support, includes a power source and a transmission assembly. The transmission assembly is connected to the power source, and its output end is connected to the door body. Driven by the power source, the transmission assembly pushes the door body from the closed position to the open position. During the movement of the door body from the open position to the closed position, the output end of the transmission assembly releases the driving force transmitted to the door body along the opening direction.

[0011] An elastic reset mechanism is installed on the bracket and connected between the door body and the frame. The elastic reset mechanism stores elastic potential energy during the movement of the door body to the open position, and releases the elastic potential energy after the transmission component releases the driving force transmission to the door body in the opening direction at the output end to drive the door body to move to the closed position.

[0012] With the above structure, the opening process is driven by the power source through the transmission component, while the closing process is driven by the transmission component disengaging from the door body. The closing motion of the door body is driven only by the elastic potential energy released by the elastic reset mechanism. The force exerted by the door body on the obstacle during the closing process is determined by the elastic restoring force of the elastic element in the elastic reset mechanism at that stroke position, which can reduce the risk of pinching the user during the closing process.

[0013] In one embodiment, the transmission assembly includes a cam and a cam plate. The cam is mounted on the output shaft of the power source, and a follower bearing is mounted on the cam. The cam plate is connected to or integrally formed with the door body. The cam plate has a contoured groove, and the follower bearing passes through the contoured groove and rolls in contact with the contoured wall of the groove. The contoured wall includes a raised section and a non-raised section. When the power source drives the cam to rotate, causing the follower bearing to pass through the non-raised section, the follower bearing pushes the cam plate, causing the door body to move towards the open position. When the follower bearing moves to the raised section, there is no thrust transmission between the follower bearing and the cam plate in the opening direction. By utilizing the structural difference between the raised and non-raised sections on the contoured wall of the contoured groove, the power source drives the cam plate through the follower bearing in one rotational direction to open the door. When the follower bearing moves to the raised section, there is no thrust transmission between the follower bearing and the cam plate in the opening direction, thus achieving a difference in mechanical characteristics between the opening and closing stages.

[0014] In one embodiment, the raised section is an arc surface equidistant from the rotation axis of the cam; a positioning plate is also mounted on the cam, and the positioning plate has a positioning groove, which is used to cooperate with an external sensor to determine the rotational angle position of the cam. By setting the raised section as an equidistant arc surface, it is ensured that there is no thrust transmission along the opening direction between the follower bearing and the cam plate at any position within this section; the positioning plate and the positioning groove enable the external sensor to determine the rotational angle position of the cam, and enable the controller to determine whether the cam is currently in the angle range corresponding to the raised section or the non-raised section.

[0015] In one embodiment, the platform has a support plate on its upper surface; it also includes an interlocking detection system, which comprises: a first detection sensor located in the area of ​​the doorway for detecting whether the reagent card has reached a preset position; an identification module fixed on the side wall of the support plate and located above the doorway for reading the coded information on the reagent card to verify the correctness of the reagent card information and insertion direction; a second detection sensor fixed on the side wall of the support for detecting whether the door has reached the closed or open position; and a controller, which is communicatively connected to the first detection sensor, the identification module, the second detection sensor, and the power source, respectively; after the first detection sensor confirms that the reagent card is in place and the identification module confirms that the reagent card information is correct, the controller controls the power source to drive the transmission assembly to move to a position that releases the driving force transmission to the door in the opening direction, so that the door closes under the action of the elastic reset mechanism. By setting up an interlocking detection system and controller, the closing action of the door is linked to the position and information accuracy of the reagent card, so that the door will only close after the reagent card is correctly positioned, avoiding subsequent detection abnormalities caused by the reagent card not being in place or in the wrong direction.

[0016] In one embodiment, the interlocking detection system further includes an obstacle detection group comprising a third detection sensor and a fourth detection sensor, respectively disposed in the area of ​​the doorway to detect the presence of obstacles in the doorway area. The controller is also communicatively connected to the obstacle detection group and only executes the action of controlling the power source when the obstacle detection group detects no obstacles. Thus, the obstacle detection group detects the presence of obstacles in the doorway area before closing, and the elastic reset mechanism limits the closing force of the door to within the elastic restoring force range of the elastic element during the closing process. Both mechanisms together reduce the risk of injury to the user during door closing.

[0017] In one embodiment, an incubation turntable is further included. The incubation turntable is rotatably mounted on the frame about a vertical axis and located at the lower part of the platform. The upper surface of the incubation turntable has multiple circumferentially distributed slots, into which reagent cards can be placed. The sidewall of the incubation turntable has multiple opening teeth, each protruding radially outward. The power source is a turntable drive motor that drives the incubation turntable to rotate. The transmission assembly includes a driven rocker arm and a roller mounted on one end of the driven rocker arm. The driven rocker arm is rotatably mounted on the frame via a first hinge shaft. On the frame, the other end of the driven rocker arm is connected to the door body via a push rod. The push rod passes through a horizontal long slot on the support wall and its outer end is hinged to the door body. The roller faces the side wall of the incubation turntable and corresponds to the movement trajectory of the opening tooth. When the incubation turntable rotates, the opening tooth pushes the roller radially outward when it passes the circumferential position of the roller. The driven rocker arm rotates around the first hinge axis, driving the door body to move towards the open position. After the opening tooth leaves the roller, the transmission assembly releases the driving force transmission to the door body along the opening direction. By setting the opening tooth on the side wall of the incubation turntable and using the driven rocker arm and roller to transmit motion, the rotational motion of the incubation turntable is converted into the opening motion of the door body. There is no need to set an independent drive motor for the door body, reducing the number of drive units in the device. At the same time, the opening timing of the door body is directly determined by the mechanical position of the opening tooth on the incubation turntable, reducing the dependence on the controller for door opening timing coordination.

[0018] In one embodiment, the driven rocker arm includes a short arm and a long arm. The first hinge shaft is located at the connection between the short arm and the long arm. The roller is installed at the end of the short arm, and the end of the long arm is connected to the push rod via a pin. The push rod has an elongated hole perpendicular to the sliding direction of the door. The pin slides in the elongated hole to absorb the motion component perpendicular to the sliding direction of the door during the swing of the driven rocker arm. The short arm and the long arm are set at an angle. Each door opening tooth corresponds to each slot. The position of each door opening tooth in the circumferential direction of the incubation turntable is offset by a preset deviation angle relative to its corresponding slot, so that when a door opening tooth reaches the circumferential position of the roller, the corresponding slot reaches the position aligned with the doorway. By setting the angle between the short arm and the long arm, the radial thrust exerted by the door opening teeth on the roller is converted into an effective driving force along the sliding direction of the door. At the same time, by designing a preset deviation angle, the mechanical synchronization of two events—door opening and the corresponding slot reaching the door position—is achieved in one turntable rotation, reducing the need for additional timing coordination methods.

[0019] In one embodiment, when the door is in the open position, the roller rests on the radially outer top surface of the opening tooth. The door is constrained by the travel limit of the slide rail, preventing the driven rocker arm from swinging further outward. The roller forms a circumferential constraint on the opening tooth to prevent the incubation turntable from rotating. When the door moves to the closed position, causing the driven rocker arm to swing back and the roller to retract from the top surface of the opening tooth, the incubation turntable resumes rotation. With the above structure, when the door is in the open position, the circumferential constraint of the roller on the tooth prevents the incubation turntable from rotating physically. This interlocking relationship is determined by the mechanical structural constraints of the opening tooth, roller, driven rocker arm, and slide rail travel limit, without relying on an electronic control system, and still prevents the turntable from rotating even in the event of a controller malfunction. The aforementioned door opening teeth, rollers, and driven rocker arm serve as the transmission structure for opening the door during the opening process, and as the constraint structure for preventing the turntable from rotating when the door remains open. The same set of mechanical components realizes the driving function and the safety constraint function at different working stages, without the need for additional independent interlocking mechanisms.

[0020] In one embodiment, the elastic reset mechanism includes a rotating rocker arm and an elastic element. The rotating rocker arm is rotatably mounted on the frame via a second hinge axis, and one end of the rotating rocker arm is hinged to the door body. One end of the elastic element is connected to the other end of the rotating rocker arm, and the other end of the elastic element is fixed to an anchor point on the frame. The line of action of the elastic force of the elastic element passes through the axis of the second hinge axis during the travel of the door body, and this position is the dead point position. When the door body is between the dead point position and the open position, the absolute value of the force exerted by the elastic reset mechanism on the door body through the rotating rocker arm along the sliding direction of the door body is less than 1N. When the door body is in the closed position, the force exerted by the elastic reset mechanism on the door body through the rotating rocker arm towards the closed position along the sliding direction of the door body is greater than 3N. Here, the aforementioned force refers to the force component exerted by the elastic reset mechanism on the door body through the rotating rocker arm along the sliding direction of the door body. By utilizing the nonlinear mechanical characteristics of the elastic reset mechanism at the dead point, the absolute value of the force applied along the sliding direction of the door when the door is between the dead point position and the open position is less than 1N, reducing the risk of the user's fingers being pinched in this area; when the door is in the closed position, the force applied along the closing direction is greater than 3N, ensuring that the door closes reliably.

[0021] In one embodiment, a fluorescence immunochromatographic analyzer includes a security door interlock device as described in any of the above embodiments and a front housing, the front housing being connected to the frame, and having an opening on the front housing corresponding to the doorway. By applying the aforementioned security door interlock device to the fluorescence immunochromatographic analyzer and aligning the opening on the front housing with the doorway, the security door interlock device is integrated into the outer casing structure of the fluorescence immunochromatographic analyzer.

[0022] To address the risk of pinching injuries caused by the transmission mechanism remaining in constant drive connection with the door during the closing process of existing safety doors, this application solves the problem by incorporating a transmission component that disengages from drive contact during the closing process and an elastic reset mechanism. To address the lack of linkage constraints between the existing safety door's open / closed state, reagent card state, and turntable movement state, this application solves the problem by incorporating an interlocking detection system and a mechanical coupling structure of the door opening tooth and driven swing arm.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. By setting up an opening drive mechanism and an elastic reset mechanism, and configuring the transmission components to disengage from the drive contact with the door body during the closing process, the opening action of the door body is forcibly driven by the power source, while the closing action is only driven by the elastic restoring force of the elastic reset mechanism. The force exerted by the door body on the obstacle during the closing process is determined by the elastic restoring force of the elastic element in the elastic reset mechanism at that stroke position, which can reduce the risk of pinching the user during the closing process of the door body;

[0025] 2. By setting up an interlocking detection system and controller, the closing action of the door is linked to the arrival status of the reagent card, the correctness of the information, and the obstacle detection results in the doorway area. This ensures that the closing action of the door is based on the premise that the reagent card is correctly in place and that there are no obstacles in the doorway area. Specifically, the obstacle detection group checks whether there are obstacles in the doorway area before closing the door, and the elastic reset mechanism limits the closing force of the door to the elastic restoring force range of the elastic element during the closing process. Both of these factors work together to reduce the risk of pinching injuries.

[0026] 3. By setting opening teeth on the side wall of the incubation turntable and using the driven rocker arm and rollers to convert the rotational motion of the turntable into the opening motion of the door, there is no need to set up a separate drive motor for the door, reducing the number of drive units in the device. At the same time, the circumferential constraint relationship between the rollers and the opening teeth forms a mechanical safety interlock that does not rely on electronic control signals. The opening teeth, rollers and driven rocker arm serve as the transmission structure for opening the door during the opening process, and as the constraint structure for preventing the turntable from rotating when the door is in the open state. The same set of mechanical components realizes the driving function and the safety constraint function respectively in different working stages.

[0027] 4. By setting the elastic reset mechanism as a dead-point spring mechanism including a rotating rocker arm and an elastic element, the force along the sliding direction of the door exhibits a non-linear distribution characteristic. The absolute value of this force is less than 1N between the dead-point position and the open position to reduce the risk of pinching injury, and the force along the closing direction at the closed position is greater than 3N to ensure reliable door closure. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of a safety door interlock device for a fluorescence immunochromatographic analyzer, according to Embodiment 1.

[0029] Figure 2 This is a schematic diagram of the overall structure of a safety door interlock device for a fluorescence immunochromatographic analyzer in Embodiment 1 when the door is in the closed position.

[0030] Figure 3 This is a schematic diagram of the overall structure of a safety door interlock device for a fluorescence immunochromatographic analyzer in Embodiment 1, when the door is in the open position.

[0031] Figure 4 This is a top view of a safety door interlock device for a fluorescence immunochromatographic analyzer in Embodiment 2, with the door in the closed position.

[0032] Figure 5 This is a top view of a safety door interlock device for a fluorescence immunochromatographic analyzer in Embodiment 2, with the door in the open position.

[0033] Figure 6 This is a schematic diagram showing the relative positions of the slot and the door opening teeth in Embodiment 2 of a safety door interlock device for a fluorescence immunochromatographic analyzer.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Frame; 11. Support; 111. Horizontal slot; 12. Platform; 121. Support plate; 2. Guard plate structure; 21. Upper guard plate; 22. Lower guard plate; 23. Doorway; 3. Reagent card; 4. Door body; 41. Slide rail; 42. Closed position; 43. Open position; 5. Door opening drive mechanism; 51. Power source; 52. Transmission assembly; 521. Cam; 5211. Follower bearing; 522. Cam plate; 5221. Profile through slot; 5222. Raised section; 5223. Non-raised section; 523. Positioning plate; 5231. Positioning slot; 524. Driven rocker arm; 5241. Short arm; 5242, Long arm; 525, Roller; 526, First hinge shaft; 527, Push rod; 5271, Long hole; 6, Elastic reset mechanism; 61, Rotating swing arm; 62, Elastic element; 63, Second hinge shaft; 64, Mounting post; 65, Anchor point; 66, Dead point position; 7, Interlock detection system; 71, First detection sensor; 72, Identification module; 73, Second detection sensor; 74, Controller; 75, Obstacle detection group; 751, Third detection sensor; 752, Fourth detection sensor; 8, Incubation turntable; 81, Slot; 82, Door opening tooth; 9, Front shell; 91, Opening. Detailed Implementation

[0036] This application provides a safety door interlock device for a fluorescence immunochromatographic analyzer, which is described below in conjunction with the appendix. Figure 1-6 This application will be described in further detail.

[0037] Example 1

[0038] Reference Appendix Figure 1-3 A safety door interlock device for a fluorescence immunochromatographic analyzer includes a frame 1, a protective plate structure 2, a door body 4, a door opening drive mechanism 5, and an elastic reset mechanism 6.

[0039] In this embodiment, the frame 1 includes a support 11 and a platform 12. The support 11 is a vertically arranged plate-shaped structure, and the platform 12 is a horizontally arranged plate-shaped structure. The support 11 and the platform 12 are spatially perpendicular to each other and are detachably connected by bolts. The platform 12 extends horizontally, and the support 11 extends vertically downward from one edge of the platform 12. The two together form an L-shaped structure. A support plate 121 is provided on the upper plate surface of the platform 12, and the support plate 121 is vertically fixed to the upper plate surface of the platform 12.

[0040] In this embodiment, the protective plate structure 2 includes an upper protective plate 21 and a lower protective plate 22. The upper protective plate 21 is fixed to the platform 12 and to the side near the support 11. The lower protective plate 22 is fixed to the top of the support 11. The upper protective plate 21 and the lower protective plate 22 are spaced apart vertically, forming an opening 23 between them for inserting the reagent card 3. The upper protective plate 21 is located on the upper surface of the platform 12 near the edge of the support 11, and the lower protective plate 22 is located on the top surface of the support 11. The vertical gap between the upper protective plate 21 and the lower protective plate 22 is the opening 23, and the reagent card 3 is inserted into the device horizontally through the opening 23.

[0041] In this embodiment, the door body 4 is a plate-shaped structural component, slidably mounted on the side wall of the support 11 via a slide rail 41. The slide rail 41 is a linear guide rail, fixedly mounted on the side wall of the support 11. The door body 4 is mounted on the slide rail 41 via a slider and performs horizontal linear reciprocating motion along the slide rail 41. The two ends of the slide rail 41 define the maximum travel range of the door body 4, corresponding respectively to the closed position 42 where the door body 4 covers the doorway 23 and the open position 43 where the doorway 23 is exposed.

[0042] In this embodiment, the door opening drive mechanism 5 is mounted on the support 11 and includes a power source 51 and a transmission assembly 52. ​​The transmission assembly 52 is drively connected to the power source 51, and the output end of the transmission assembly 52 is connected to the door body 4. In this embodiment, the power source 51 is a motor, which is fixedly mounted on the side wall of the support 11. The transmission assembly 52 includes a cam 521 and a cam plate 522. The cam 521 is mounted on the output shaft of the motor and rotates in a vertical plane. A follower bearing 5211 is mounted on the cam 521, and the follower bearing 5211 is installed at an eccentric position on the cam 521 to reduce the contact friction between the cam 521 and the cam plate 522. The cam plate 522 is connected to or integrally formed with the door body 4, and the cam plate 522 moves linearly in the horizontal direction with the door body 4. The cam plate 522 is provided with a contoured through groove 5221, and the follower bearing 5211 passes through the contoured through groove 5221 and rolls with the contoured wall of the contoured through groove 5221. When the cam 521 rotates, the follower bearing 5211 moves along an arc trajectory. The horizontal component of its motion pushes the cam plate 522 to move in the horizontal direction through the contour wall of the contour groove 5221, while the vertical component of its motion is absorbed by the vertical extension space of the contour groove 5221.

[0043] Specifically, the contour wall includes a raised section 5222 and a non-raised section 5223. The raised section 5222 is an arc surface equidistant from the rotation axis of the cam 521. When the motor drives the cam 521 to rotate clockwise, causing the follower bearing 5211 to pass through the non-raised section 5223, the follower bearing 5211 pushes the cam plate 522, causing the door body 4 to move along the slide rail 41 to the open position 43. When the motor drives the cam 521 to continue rotating, causing the follower bearing 5211 to move to the raised section 5222, since the raised section 5222 is an equidistant arc surface, there is no thrust transmission between the follower bearing 5211 and the cam plate 522 in the opening direction, and the output end of the transmission component 52 disengages from the driving contact with the door body 4.

[0044] Specifically, the cam 521 is connected to the support 11 through a positioning disk 523. The positioning disk 523 is coaxially arranged with the cam 521. A positioning groove 5231 is provided radially inward on the side wall of the positioning disk 523. The positioning groove 5231 is used to cooperate with external sensors to determine the rotation angle position of the cam 521, so that the controller 74 can determine the motion state of the door 4.

[0045] In this embodiment, the elastic reset mechanism 6 includes an elastic element 62 and a mounting post 64. The mounting post 64 is fixedly mounted on the side wall of the support 11 and is perpendicular to the side wall of the support 11. The axial direction of the mounting post 64 is perpendicular to the sliding direction of the door body 4. The elastic element 62 is a tension spring. One end of the elastic element 62 is connected to the mounting post 64, and the other end is connected to the side wall of the door body 4. During the movement of the door body 4 from the closed position 42 to the open position 43, the elastic element 62 is stretched and stores elastic potential energy. After the output end of the transmission assembly 52 disengages from the driving contact with the door body 4, the elastic element 62 releases the elastic potential energy to drive the door body 4 from the open position 43 to the closed position 42. Since the closing movement of the door 4 is driven only by the elastic restoring force of the elastic element 62, the force exerted by the door 4 on the obstacle during the closing process is limited by the elastic coefficient of the elastic element 62. Even if the user's finger does not withdraw from the doorway 23 area in time after pushing in the reagent card 3, the pressure exerted by the spring force on the finger is limited by the product of the stretch of the elastic element 62 at that stroke position and the elastic coefficient.

[0046] In this embodiment, a chain detection system 7 is also included, which includes a first detection sensor 71, an identification module 72, a second detection sensor 73, an obstacle detection group 75, and a controller 74.

[0047] Specifically, the first detection sensor 71 is located in the area of ​​the doorway 23. In this embodiment, the first detection sensor 71 is specifically manifested as an optocoupler located on the upper guard plate 21 and on the lower guard plate 22. The two together are used to detect whether the reagent card 3 has reached the preset position. The optocoupler includes a transmitter and a receiver. When the object being detected enters the detection area between the transmitter and the receiver, it blocks or reflects the light signal, causing the output state of the optocoupler to change.

[0048] Specifically, the identification module 72 is fixed to the side wall of the support plate 121 and located above the doorway 23. It is used to read the coded information on the reagent card 3 to verify the correctness of the reagent card 3 information and insertion direction. In this embodiment, the identification module 72 is a barcode scanner; in other embodiments, it can also be an RFID reader / writer or a QR code scanner.

[0049] Specifically, the second detection sensor 73 is fixed on the side wall of the support 11 and located near the cam 521. In this embodiment, the second detection sensor 73 is specifically manifested as an optocoupler symmetrically arranged on the support 11 in the horizontal direction. One optocoupler near the spring is used to detect whether the door 4 has reached the closed position 42, and the other optocoupler near the slide rail 41 is used to detect whether the door 4 has reached the open position 43.

[0050] Specifically, the obstacle detection group 75 includes a third detection sensor 751 and a fourth detection sensor 752. In this embodiment, the third detection sensor 751 and the fourth detection sensor 752 are specifically implemented as optocouplers respectively installed in the doorway 23 area, used to detect whether there are obstacles in the doorway 23 area.

[0051] Specifically, the controller 74 is communicatively connected to the first detection sensor 71, the identification module 72, the second detection sensor 73, the obstacle detection group 75, and the power source 51. The controller 74 receives the detection signals from each sensor and sends control commands to the power source 51 according to a preset interlocking logic. Specifically, the controller 74 only controls the power source 51 to rotate, causing the cam 521 to rotate in the opposite direction to the door opening direction, and causing the follower bearing 5211 to move to the protruding section 5222, thereby structurally disengaging from the drive contact with the door body 4: the first detection sensor 71 confirms the trigger, the identification module 72 confirms the reagent card information is correct, and the obstacle detection group 75 does not detect an obstacle. If any condition is not met, the controller 74 does not issue an action command, the power source 51 remains in its current position, the follower bearing 5211 remains in the non-protruding section 5223, and the door body 4 remains in the open position 43.

[0052] In this embodiment, the safety door interlocking device also includes an incubation turntable 8. The incubation turntable 8 is a rotatable disc structure, mounted on the frame 1 around a vertical axis and located below the platform 12. Its upper surface has multiple slots 81 evenly distributed circumferentially, into which reagent cards 3 can be placed. The incubation turntable 8 is driven to rotate by an independent turntable drive motor. The incubation turntable 8 is located below the platform 12, allowing the reagent card 3 to fall directly into the slots 81 on the upper surface of the incubation turntable 8 after being inserted through the doorway 23.

[0053] The working principle of the safety door interlocking device provided in this application embodiment is as follows:

[0054] After the device is powered on, the controller 74 first drives the power source 51 to rotate the cam 521 to the position where the follower bearing 5211 is located in the protrusion section 5222. At this time, the door body 4 is in the closed position 42 under the action of the elastic reset mechanism 6.

[0055] After the controller 74 issues an opening command, the power source 51 drives the cam 521 to rotate clockwise. The follower bearing 5211 on the cam 521 passes through the non-protruding section 5223 of the contour wall of the contour groove 5221, pushing the cam plate 522 to move the door 4 along the slide rail 41 to the open position 43. At this time, the elastic element 62 is stretched and stores energy. The power source 51 stops after the second detection sensor 73 near the slide rail 41 is triggered. The user pushes the reagent card 3 into the card slot 81 of the incubation turntable 8 through the door 23. The interlocking detection system 7 verifies in sequence that the reagent card 3 is in place, the information is correct, and the door 23 is unobstructed. Once all interlocking conditions are met, the controller 74 controls the power source 51 to operate. The power source 51 drives the cam 521 to continue rotating, causing the follower bearing 5211 to move from the non-protruding section 5223 to the protruding section 5222. There is no thrust transmission between the follower bearing 5211 and the cam plate 522 in the opening direction, and the door 4 closes automatically under the elastic restoring force of the elastic element 62. After the second detection sensor 73 near the elastic element 62 is triggered, the controller 74 confirms that the door 4 has closed, starts the incubation turntable 8 to rotate, and enters the subsequent incubation and detection process.

[0056] After incubation and testing are completed, the controller 74 drives the incubation turntable 8 to rotate so that the slot 81 where the tested reagent card 3 is located returns to the position aligned with the door 23. Then, the power source 51 is driven to open the door 4, and the user takes out the reagent card 3.

[0057] Example 2

[0058] Reference Appendix Figure 4-6This embodiment is basically the same in structure as Embodiment 1, except that the independent door drive motor and cam mechanism in Embodiment 1 are eliminated. Instead, the rotation of the incubation turntable 8 directly drives the door 4 to open via the driven rocker arm 524, roller 525, and push rod 527. At the same time, the elastic reset mechanism 6 adopts a dead-point spring mechanism including a rotating rocker arm 61 and an elastic element 62 to replace the ordinary spring in Embodiment 1.

[0059] To facilitate the description of the spatial relationships and movement directions of the components, this embodiment establishes a Cartesian coordinate system with the axis of the first hinge shaft 526 as the origin: the X-axis is parallel to the wall of the support 11 and points in the opening direction of the door 4, and the Y-axis is perpendicular to the wall of the support 11 and points from the wall of the support 11 towards the center of the incubation turntable 8. Hereinafter, "left" refers to the positive X-axis direction, i.e., the opening direction; "right" refers to the negative X-axis direction, i.e., the closing direction; "inner" refers to the positive Y-axis direction, i.e., towards the incubation turntable 8; and "outer" refers to the negative Y-axis direction, i.e., towards the wall.

[0060] In this embodiment, the slide rail 41 is mounted on the outer wall of the support 11 and extends horizontally along the X-axis. The door 4 is slidably mounted on the outer wall of the support 11 via the slide rail 41 and slides left and right along the X-axis. The doorway 23 is formed on the wall of the support 11. When the door 4 moves to the left, the doorway 23 is exposed, which is the open position 43. When the door 4 moves to the right, the doorway 23 is covered, which is the closed position 42. The two ends of the slide rail 41 correspond to the closed position 42 and the open position 43, respectively. In this embodiment, the stroke of the door 4 is preferably set to 22mm, and the slide rail 41 is a miniature linear guide with a low coefficient of friction. The sliding friction force of the door 4 moving along the slide rail 41 does not exceed 0.5N.

[0061] In a preferred embodiment, the incubation turntable 8 is rotatably mounted on the frame 1 about a vertical axis and located inside the support 11. Its outer diameter is preferably 200 mm. The upper surface of the incubation turntable 8 preferably has 12 slots 81, with a spacing of 30 degrees between the slots 81. The lower part of the side wall has correspondingly 12 opening teeth 82, each protruding 10 mm radially outward. The slots 81 and opening teeth 82 are arranged in layers in the vertical direction to avoid interference. The incubation turntable 8 has a stepped disc structure, and the diameter of the upper surface with the slots 81 is larger than the diameter of the lower surface with the opening teeth 82. Each opening tooth 82 is circumferentially ahead of its corresponding slot 81 in the rotation direction of the incubation turntable 8 by a preset deviation angle α. In this embodiment, the rotation direction of the incubation turntable 8 is clockwise, and the preset deviation angle α is preferably 30 degrees. The opening tooth 82 has a trapezoidal cross-section and a top circumferential width of 16mm. In this embodiment, the preset deviation angle α is equal to the angular distance between adjacent slots 81. This means that when an opening tooth 82 reaches the circumferential position of the roller 525, the slot 81 corresponding to the opening tooth 82 has rotated 30 degrees ahead of its initial position along the rotation direction of the incubation turntable 8, and just reaches the position aligned with the door 23.

[0062] In this embodiment, the transmission assembly 52 includes a driven rocker arm 524, a roller 525, and a push rod 527. The driven rocker arm 524 is rotatably mounted on the frame 1 via a first hinge axis 526. Viewed from a top view, the driven rocker arm 524 rotates counterclockwise around the first hinge axis 526, which is vertically positioned inside the support 11. In a preferred embodiment, the first hinge axis 526 is 55mm from the inner wall of the support 11 along the Y-axis and 35mm offset from the center of the doorway 23 in the opening direction along the X-axis. The driven rocker arm 524 swings around the first hinge axis 526 in the horizontal plane, including a short arm 5241 and a long arm 5242. The short arm 5241 is preferably 45mm long, and the long arm 5242 is preferably 55mm long. The counterclockwise angle between the short arm 5241 and the long arm 5242 is 120 degrees. The short arm 5241 extends towards the side wall of the incubation turntable 8. In the closed position, the angle between the short arm 5241 and the positive X-axis is 105 degrees, meaning the short arm 5241 points towards the side wall of the incubation turntable 8 and is slightly to the upper left. A roller 525 is installed at the end of the short arm 5241. In the closed position 42, the radial clearance between the roller 525 and the side wall of the incubation turntable 8 is preferably 2mm, allowing the opening teeth 82 to contact the roller 525 upon arrival. The long arm 5242 extends towards the wall of the support 11. In the closed position, the angle between the long arm 5242 and the positive X-axis is 225 degrees, meaning the long arm 5242 points towards the lower right, towards the wall of the support 11. The end of the long arm 5242 is connected to a push rod 527 via a pin. The push rod 527 extends outward through a horizontal long slot 111 opened along the X-axis on the wall of the support 11. The push rod 527 is a round rod, and the horizontal long slot 111 is an oblong slot that matches the diameter of the push rod 527. The push rod 527 slides in the horizontal long slot 111 along the X-axis. The outer end of the push rod 527 is hinged to the door body 4. The push rod 527 has an elongated hole 5271 along the Y-axis. The length of the elongated hole 5271 is preferably 16mm. The pin at the end of the long arm 5242 slides in the elongated hole 5271 along the Y-axis to absorb the motion component perpendicular to the wall surface in the arc motion of the driven swing rod 524. In this embodiment, when the driven rocker arm 524 rotates counterclockwise by 26.9 degrees from the closed position 42, the end of the short arm 5241 moves outward by 10 mm along the Y-axis, the end of the long arm 5242 moves outward by 22 mm along the positive X-axis, and the end of the long arm 5242 moves outward by approximately 13.4 mm along the Y-axis, which is absorbed by the elongated hole 5271 of the push rod 527. The opening tooth 82 pushes the roller 525 to move outward radially by 10 mm, the short arm 5241 swings outward, the driven rocker arm 524 rotates counterclockwise by 26.9 degrees as a whole, the end of the long arm 5242 moves to the left, and the push rod 527 pulls the door body 4 to move 22 mm to the left along the slide rail 41 to the open position 43.

[0063] In this embodiment, the rotating rocker arm 61 and the driven rocker arm 524 in the elastic reset mechanism 6 are the same rod. The elastic element 62 is a compression spring, preferably a spring plunger structure, with one end hinged to the end of the short arm 5241 and the other end hinged to an anchor point 65. In a preferred embodiment, the direction angle of the anchor point 65 relative to the first hinge axis 526 is 127.9 degrees, the elastic coefficient of the elastic element 62 is preferably 0.8 N / mm, and the natural length is preferably 120 mm. The dead point is located at 85% of the full stroke, that is, when the door 4 has moved to the left by about 18.7 mm from the closed position 42. At the dead position 66, the driven lever 524 rotates counterclockwise by 22.9 degrees from the closed position 42. At this time, the direction angle of the short arm 5241 is 127.9 degrees. The end of the short arm 5241, the axis of the first hinge shaft 526, and the anchor point 65 are collinear. The line of action of the elastic force of the elastic element 62 passes through the axis of the first hinge shaft 526, and the torque of the elastic force on the first hinge shaft 526 is zero. Between the dead position and the open position 43, that is, the range of door body 4 displacement from 18.7mm to 22mm, with a total stroke of 3.3mm, the elastic reset mechanism 6 generates a force of less than 1N along the opening direction. Between the dead point and the closed position 42, that is, the range of door body 4 displacement from 0 to 18.7 mm, with a total travel of 18.7 mm, the force along the closing direction gradually increases from the zero value at the dead point position 66. At the closed position 42, the force along the closing direction is greater than 3 N. In this embodiment, the force along the closing direction at the closed position 42 is about 3.4 N.

[0064] The line of action of the elastic element 62 is the line connecting the end of the short arm 5241 and the anchor point 65. Since the elastic element 62 is a compression spring, its elastic force is the thrust along this line from the anchor point 65 to the end of the short arm 5241. When the driven rocker arm 524 rotates, the end of the short arm 5241 moves in an arc around the first hinge axis 526, and the direction of the line of action of the elastic force changes accordingly. At the dead point position 66, the line of action of the elastic force passes exactly through the axis of the first hinge axis 526, the torque of the elastic force on the first hinge axis 526 is zero, and the force component along the sliding direction of the door body 4 is zero. On both sides of the dead point position 66, the line of action of the elastic force deviates from the axis of the first hinge axis 526, generating a non-zero torque. When the end of the short arm 5241 is in the clockwise direction at the dead point, the elastic force generates a clockwise torque; when the end of the short arm 5241 is in the counterclockwise direction at the dead point, the elastic force generates a counterclockwise torque. This over-dead-point compression spring mechanism achieves the desired asymmetric nonlinear mechanical characteristics: within a 3.3mm stroke between the dead point and the open position 43, the elastic element 62 generates a counterclockwise opening torque, which is transmitted to the door body 4 through the long arm 5242 and the push rod 527, and the force along the opening direction is less than 1N; within a 18.7mm stroke between the dead point and the closed position 42, the elastic element 62 generates a clockwise closing torque, and the force along the closing direction is greater than 3N.

[0065] It should be noted that the numerical range of the aforementioned force value can be achieved by selecting the elastic coefficient and natural length of the elastic element 62. A larger elastic coefficient results in a larger absolute force value; the closer the natural length is to the length of the elastic element 62 at the dead point position 66, the higher the degree of non-linearity of the force value on both sides of the dead point. In other preferred embodiments, the specific values ​​of the elastic coefficient and natural length of the elastic element 62 can be determined through conventional mechanical calculations based on the above principles. In one preferred embodiment, when the elastic coefficient is 1.0 N / mm and the natural length is 118 mm, the force along the closing direction at the closed position 42 is approximately 4.2 N; when the elastic coefficient is 0.6 N / mm and the natural length is 122 mm, the force along the closing direction at the closed position 42 is approximately 3.1 N. By adjusting the elastic coefficient and natural length of the elastic element 62, the force along the closing direction can be adjusted within the range of 3 N to 10 N.

[0066] In this embodiment, the first hinge axis 526 and the second hinge axis 63 are the same axis. In other preferred embodiments, the rotating rocker arm 61 and the driven rocker arm 524 can be two independent rods coaxially mounted around the same hinge axis, in which case the first hinge axis 526 and the second hinge axis 63 are still the same axis; or they can be two independent rods mounted around different hinge axes, in which case the first hinge axis 526 and the second hinge axis 63 are different axes.

[0067] In this embodiment, when the door 4 is opened, the roller 525 stops on the top surface of the opening tooth 82, the left end of the slide rail 41 is limited so that the driven rocker arm 524 cannot rotate further counterclockwise, the roller 525 constrains the opening tooth 82, and the incubation turntable 8 is mechanically locked.

[0068] In this embodiment, the structure of the interlocking detection system 7 is the same as that in embodiment 1. The second detection sensor 73 is fixed on the outer wall of the support 11 and located near the end of the slide rail 41.

[0069] The working principle of the safety door interlocking device provided in this application embodiment is as follows:

[0070] After the device is powered on, the incubation turntable 8 rotates to the initial angle where the door-opening tooth 82 is located at the position of the roller 525. The elastic element 62 is in a compressed state between the dead point and the closed position 42. Due to the geometric relationship between the end of the short arm 5241, the first hinge shaft 526 and the anchor point 65, the elastic element 62 applies a clockwise torque to the driven swing arm 524, pushing the door 4 to the right closed position 42 through the push rod 527, and the door 4 covers the doorway 23. The second detection sensor 73 detects that the door 4 is in the closed position 42.

[0071] The controller 74 instructs the turntable drive motor to drive the incubation turntable 8 to rotate clockwise. An opening tooth 82 rotates with the incubation turntable 8 to the circumferential position of the roller 525. The entry ramp of the opening tooth 82 first contacts the roller 525. As the incubation turntable 8 continues to rotate, the entry ramp pushes the roller 525 radially outward. Because the opening tooth 82 moves tangentially to the incubation turntable 8, the thrust it exerts on the roller 525 includes radial and tangential components. The radial component causes the roller 525 to move outward, and the driven rocker arm 524 rotates around the first hinge axis 526 in the opposite direction to the rotation of the incubation turntable 8. The roller 525 drives the short arm 5241 to swing outward, and the driven rocker arm 524 rotates counterclockwise around the first hinge axis 526. The end of the long arm 5242 moves to the left, pulling the door 4 to the left along the slide rail 41 via the push rod 527. The elastic element 62 is further compressed to store energy. When the radially outer top surface of the door opening tooth 82 reaches the position of the roller 525, the short arm 5241 swings outward by 26.9 degrees, the door body 4 moves 22mm to the left to reach the open position 43, and the door body 4 moves open to reveal the doorway 23. At the same time, the slot 81 corresponding to the door opening tooth 82 rotates to the position aligned with the doorway 23.

[0072] After the door 4 reaches the open position 43, the left end of the slide rail 41 stops the door 4 from moving further to the left, the driven rocker arm 524 cannot rotate further counterclockwise, and the roller 525 is constrained on the radially outer top surface of the opening tooth 82, forming a circumferential constraint on the opening tooth 82 and preventing the incubation turntable 8 from continuing to rotate. This mechanical interlock is achieved by a purely mechanical structure and does not rely on electronic control signals. At this time, the turntable drive motor stops. The second detection sensor 73 detects that the door 4 has left the closed position 42. The user inserts the reagent card 3 into the aligned card slot 81 through the door 23. Since the incubation turntable 8 is mechanically locked and cannot rotate when the door 4 is open, the user will not be injured by the rotation of the turntable during the insertion of the reagent card 3.

[0073] After reagent card 3 is inserted into card slot 81, the first detection sensor 71 detects that reagent card 3 is in place, and the identification module 72 reads the information on reagent card 3. The controller 74 only allows the next step after confirming that reagent card 3 is in place and the information is correct. If reagent card 3 is not in place or the information is incorrect, the controller 74 does not issue subsequent instructions, the door 4 remains in the open position 43, the incubation turntable 8 remains in a mechanically locked state, and prompts the user to reoperate through the external display interface.

[0074] The controller 74 instructs the turntable drive motor to continue rotating the incubation turntable 8 clockwise. The exit ramp of the door opening tooth 82 slides out from the radially inner side of the roller 525. The exit ramp is the ramp where the top of the door opening tooth 82 transitions to the side wall of the incubation turntable 8. Its normal force includes a radial component pointing towards the center of the incubation turntable 8. This radial component applies a small radial retraction force to the roller 525, causing the driven rocker arm 524 to obtain an initial clockwise rotation tendency, and the door 4 to obtain an initial rightward movement speed. After the roller 525 completely retracts from the door opening tooth 82, the transmission assembly 52 disengages from the drive contact, and the door 4 is driven by the elastic reset mechanism 6. Within the first 3.3mm stroke, the elastic reset mechanism 6 generates a counterclockwise torque of less than 1N. The movement of the door 4 partly depends on the initial speed provided by the exit ramp of the door opening tooth 82 to overcome the resistance and the friction of the slide rail 41. Since the sliding friction of the slide rail 41 does not exceed 0.5N, the force generated by the elastic reset mechanism 6 in the opening direction within this section is less than 1N, and the combined resistance is less than 1.5N. The initial kinetic energy provided by the exit of the opening tooth 82 from the inclined plane is sufficient to keep the door 4 moving within the 3.3mm stroke. After passing the dead point, in the subsequent 18.7mm stroke, the elastic reset mechanism 6 switches to generating a clockwise closing torque. The force in the closing direction gradually increases from zero, and when approaching the closed position 42, the force in the closing direction exceeds 3N. The door 4 accelerates to the right to close and cover the doorway 23.

[0075] The second detection sensor 73 detects that the door 4 has returned to the closed position 42, and the controller 74 confirms that the door 4 is closed. The incubation turntable 8 continues to rotate, rotating the slot 81 of the reagent card 3 to the incubation area for incubation. When the next door opening tooth 82 reaches the position of the roller 525, the above steps are repeated to achieve the next cycle.

[0076] After incubation and testing are completed, the controller 74 instructs the turntable drive motor to drive the incubation turntable 8 to rotate, so that the opening tooth 82 corresponding to the slot 81 where the tested reagent card 3 is located reaches the circumferential position of the roller 525 again. Due to the design of the preset deviation angle α, when the opening tooth 82 reaches the position of the roller 525, the corresponding slot 81 is exactly aligned with the door 23. The opening tooth 82 pushes the roller 525 to open the door 4, and the user takes out the reagent card 3 from the door 23. After the card is taken out, the controller 74 confirms that the reagent card 3 has been taken out, instructs the turntable drive motor to drive the incubation turntable 8 to continue rotating, the opening tooth 82 leaves the roller 525, and the door 4 closes under the action of the elastic reset mechanism 6.

[0077] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A safety door interlock device for a fluorescence immunochromatographic analyzer, characterized in that, include: A frame (1) includes a support (11) and a platform (12), wherein the support (11) and the platform (12) are perpendicularly arranged and connected to each other; The protective plate structure (2) includes an upper protective plate (21) and a lower protective plate (22). The upper protective plate (21) is fixed to the upper surface of the platform (12) and close to the edge of the support (11). The lower protective plate (22) is fixed to the top of the support (11). The upper protective plate (21) and the lower protective plate (22) are spaced apart in the vertical direction. A doorway (23) for inserting the reagent card (3) is formed between the upper protective plate (21) and the lower protective plate (22). The door (4) is slidably mounted on the side wall of the support (11) via a slide rail (41). The door (4) has a closed position (42) that covers the doorway (23) and an open position (43) that exposes the doorway (23). A door opening drive mechanism (5) is installed on the support (11). The door opening drive mechanism (5) includes a power source (51) and a transmission component (52). The transmission component (52) is connected to the power source (51) in a transmission manner. The output end of the transmission component (52) is connected to the door body (4). Under the drive of the power source (51), the transmission component (52) pushes the door body (4) from the closed position (42) to the open position (43). During the process of the door body (4) moving from the open position (43) to the closed position (42), the output end of the transmission component (52) releases the transmission of driving force to the door body (4) along the opening direction. as well as An elastic reset mechanism (6) is installed on the frame (1) and connected between the door body (4) and the frame (1). The elastic reset mechanism (6) stores elastic potential energy during the movement of the door body (4) to the open position (43), and releases the elastic potential energy after the transmission component (52) releases the driving force transmission to the door body (4) in the opening direction to drive the door body (4) to move to the closed position (42). The elastic reset mechanism (6) includes a rotating rocker arm (61) and an elastic element (62). The rotating rocker arm (61) is rotatably mounted on the frame (1) via the second hinge shaft (63). One end of the rotating rocker arm (61) is hinged to the door body (4). One end of the elastic element (62) is connected to the other end of the rotating rocker arm (61), and the other end of the elastic element (62) is fixed to an anchor point (65) on the frame (1). The elastic force line of the elastic element (62) passes through the axis of the second hinge shaft (63) at a certain position in the stroke of the door body (4). This position is the dead point position (66).

2. The safety door interlock device for a fluorescence immunochromatographic analyzer according to claim 1, characterized in that, The transmission assembly (52) includes a cam (521) and a cam plate (522). The cam (521) is mounted on the output shaft of the power source (51), and a follower bearing (5211) is mounted on the cam (521). The cam plate (522) is connected to or integrally formed with the door body (4). The cam plate (522) is provided with a contour groove (5221). The follower bearing (5211) passes through the contour groove (5221) and rolls with the contour wall of the contour groove (5221). The contour wall includes a convex... In the opening section (5222) and the non-protruding section (5223), when the power source (51) drives the cam (521) to rotate and causes the follower bearing (5211) to move along the non-protruding section (5223), the follower bearing (5211) pushes the cam plate (522) to drive the door body (4) to move towards the opening position (43); when the follower bearing (5211) moves to the protruding section (5222), there is no thrust transmission between the follower bearing (5211) and the cam plate (522) in the opening direction.

3. A safety door interlock device for a fluorescence immunochromatographic analyzer according to claim 2, characterized in that, The protruding section (5222) is an arc surface equidistant from the rotation axis of the cam (521). A positioning disk (523) is also installed on the cam (521). A positioning groove (5231) is provided on the positioning disk (523). The positioning groove (5231) is used to cooperate with an external sensor to determine the rotation angle position of the cam (521).

4. A safety door interlock device for a fluorescence immunochromatographic analyzer according to claim 1, characterized in that, The platform (12) has a support plate (121) on its upper surface; it also includes a chain detection system (7), which includes a first detection sensor (71), an identification module (72), a second detection sensor (73), and a controller (74). The first detection sensor (71) is located in the area of ​​the doorway (23) and is used to detect whether the reagent card (3) has reached the preset position. The identification module (72) is fixed on the side wall of the support plate (121) and located above the doorway (23) and is used to read the coded information on the reagent card (3). The second detection sensor (73) is fixed on the support plate (11). On the side wall of the door (4), it is used to detect whether the door (4) has reached the closed position (42) or the open position (43); the controller (74) is communicatively connected to the first detection sensor (71), the identification module (72), the second detection sensor (73) and the power source (51). After the first detection sensor (71) confirms that the reagent card (3) is in place and the identification module (72) confirms that the information of the reagent card (3) is correct, the controller (74) controls the power source (51) to drive the transmission component (52) to move to the position where it releases the driving force transmission to the door (4) in the opening direction.

5. A safety door interlock device for a fluorescence immunochromatographic analyzer according to claim 4, characterized in that, The chain detection system (7) also includes an obstacle detection group (75), which includes a third detection sensor (751) and a fourth detection sensor (752). The third detection sensor (751) and the fourth detection sensor (752) are respectively set in the area of ​​the doorway (23). The controller (74) is also connected to the obstacle detection group (75) and only performs the action of controlling the power source (51) when the obstacle detection group (75) does not detect any obstacles.

6. A safety door interlock device for a fluorescence immunochromatographic analyzer according to claim 1, characterized in that, It also includes an incubation turntable (8), which is rotatably mounted on the frame (1) around a vertical axis and located at the lower part of the platform (12). The upper end face of the incubation turntable (8) is provided with a plurality of slots (81) distributed circumferentially. The reagent card (3) can be placed in the corresponding slot (81). The side wall of the incubation turntable (8) is provided with a plurality of opening teeth (82), each of the opening teeth (82) protruding radially outward. The power source (51) is a turntable drive motor, which drives the incubation turntable (8) to rotate. The transmission assembly (52) includes a driven swing rod (524) and a roller (525) mounted on one end of the driven swing rod (524). The driven swing rod (524) is rotatably mounted on the frame (1) through a first hinge shaft (526). The other end of the push rod (524) is connected to the door body (4) via a push rod (527). The push rod (527) passes through the horizontal long groove (111) on the wall of the support (11) and its outer end is hinged to the door body (4). The roller (525) faces the side wall of the incubation turntable (8) and corresponds to the movement trajectory of the opening tooth (82). When the incubation turntable (8) rotates, the opening tooth (82) pushes the roller (525) radially outward when it passes the circumferential position of the roller (525). The driven rocker arm (524) rotates around the first hinge axis (526) to drive the door body (4) to the open position (43). After the opening tooth (82) leaves the roller (525), the output end of the transmission component (52) releases the driving force transmission to the door body (4) in the opening direction.

7. A safety door interlock device for a fluorescence immunochromatographic analyzer according to claim 6, characterized in that, The driven rocker arm (524) includes a short arm (5241) and a long arm (5242). The first hinge shaft (526) is located at the connection between the short arm (5241) and the long arm (5242). The roller (525) is installed at the end of the short arm (5241), and the end of the long arm (5242) is connected to the push rod (527) by a pin. The push rod (527) is provided with an elongated hole (5271) perpendicular to the sliding direction of the door body (4). The pin slides in the elongated hole (5271) to absorb the swing of the driven rocker arm (524). The motion component perpendicular to the sliding direction of the door body (4) during the movement process, the short arm (5241) and the long arm (5242) are set at an angle, each of the door opening protrusions (82) corresponds to each of the slots (81), and each of the door opening protrusions (82) is offset from its corresponding slot (81) by a preset deviation angle in the circumferential position of the incubation turntable (8), so that when a door opening protrusion (82) reaches the circumferential position of the roller (525), the corresponding slot (81) reaches the position aligned with the doorway (23).

8. A safety door interlock device for a fluorescence immunochromatographic analyzer according to claim 7, characterized in that, When the door (4) is in the open position (43), the roller (525) rests on the radially outer top surface of the opening tooth (82). The door (4) is constrained by the travel limit of the slide rail (41), preventing the driven rocker arm (524) from swinging outward further. The roller (525) forms a circumferential constraint on the opening tooth (82) to prevent the incubation turntable (8) from rotating. When the door (4) moves to the closed position (42), causing the driven rocker arm (524) to swing back and the roller (525) to retract from the top surface of the opening tooth (82), the incubation turntable (8) resumes rotation.

9. A safety door interlock device for a fluorescence immunochromatographic analyzer according to claim 1, characterized in that, When the door (4) is in any position between the dead position (66) and the open position (43), the absolute value of the force exerted by the elastic reset mechanism (6) on the door (4) through the rotating rocker arm (61) along the sliding direction of the door (4) is less than 1 Newton; when the door (4) is in the closed position (42), the force exerted by the elastic reset mechanism (6) on the door (4) through the rotating rocker arm (61) towards the closed position (42) along the sliding direction of the door (4) is greater than 3 Newtons.

10. A fluorescence immunochromatographic analyzer, characterized in that, The device includes a safety door interlocking device according to any one of claims 1 to 9 and a front housing (9), the front housing (9) being connected to the frame (1), and the front housing (9) having an opening (91) corresponding to the doorway (23).

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