A powder reagent dispensing device

Abstract

The application provides a powder reagent dispensing device. The powder reagent dispensing device comprises a housing adapted to contain powder reagent and comprising an outlet adapted to output the powder reagent; a switch assembly arranged corresponding to the outlet and adapted to move to open or close the outlet; wherein the switch assembly comprises a moving piece comprising a moving piece opening part and a moving piece sealing part and adapted to move forward to make the moving piece opening part correspond to the outlet to open the outlet and move backward to make the moving piece sealing part correspond to the outlet to close the outlet; and a rotating piece adapted to rotate forward to drive the moving piece to move forward and rotate backward to drive the moving piece to move backward. The application arranges the switch assembly comprising the moving piece and the rotating piece at the outlet of the housing, and the outlet can be opened or closed by controlling the forward rotation or the backward rotation of the rotating piece to drive the moving piece to move forward or move backward, which is easy to operate and control and is beneficial to ensure that the outlet is well sealed.

Description

Technical Field

[0001] This application relates to a powder reagent dispensing device. Background Technology

[0002] Powder filling equipment is a device used to fill powdered reagents. Existing powder filling equipment has problems such as difficulty in controlling the filling outlet. Summary of the Invention

[0003] This application provides a powder reagent dispensing device, which includes a switch assembly comprising a moving part and a rotating part at the outlet of the housing. By controlling the rotating part to rotate forward or reverse to drive the moving part to move forward or backward, the outlet can be opened or closed. This is not only easy to operate and control, but also helps to ensure good sealing of the outlet.

[0004] Therefore, this application provides the following technical solution:

[0005] A powder reagent dispensing device includes: a housing adapted to contain powder reagent and including an outlet adapted to dispense the powder reagent; a switching assembly disposed corresponding to the outlet and adapted to move to open or close the outlet; wherein the switching assembly includes: a moving member including a moving member opening and a moving member sealing portion and adapted to move forward to open the outlet by aligning the moving member opening with the outlet, and to move in reverse to close the outlet by aligning the moving member sealing portion with the outlet; and a rotating member adapted to rotate forward to drive the moving member to move forward and to rotate in reverse to drive the moving member to move in reverse.

[0006] Optionally, the switch assembly further includes a tension spring; the two ends of the tension spring are a fixed end and a movable end, respectively; the fixed end is fixed relative to the housing; the movable end is connected to the movable member and is adapted to be abutted by the rotating member when the rotating member rotates in the forward direction so as to drive the movable member to move in the forward direction under the drive of the rotating member and stretch the tension spring; the tension spring is adapted to restore the stretch when the rotating member rotates in the reverse direction and drive the movable member to move in the reverse direction through the movable end.

[0007] Optionally, the rotating member has a fan-shaped structure and includes a rotation center located at the center of the fan shape, and a first arm extending radially outward from its arcuate edge; the rotating member is adapted to rotate about the rotation center; the first arm is adapted to abut against the moving end during forward rotation of the rotating member.

[0008] Optionally, the rotating member further includes a second arm extending radially outward from the arcuate edge of the sector; the second arm is disposed adjacent to the first arm, and the two together with the arcuate edge are adapted to form a movable groove; when the first arm abuts against the moving end, the moving end is adapted to be received in the movable groove and move therein radially.

[0009] Optionally, the length of the second arm is less than the length of the first arm, so that the movable end is adapted to enter or disengage from the movable slot from the end of the second arm.

[0010] Optionally, the rotating member further includes a third arm extending radially outward from the arcuate edge of the sector; the third arm is disposed away from the first arm and is adapted to abut against the moving end as the rotating member rotates in the opposite direction to drive the moving member to move in the opposite direction.

[0011] Optionally, the switch assembly further includes a switch motor connected to the rotating member and a forward position switch connected to the switch motor; the switch motor is adapted to drive the rotating member to rotate forward; the rotating member is adapted to abut against the forward position switch when rotating forward and driving the moving member to move forward to open the outlet; the switch motor is also adapted to stop the rotating member from rotating forward when the rotating member abuts against the forward position switch.

[0012] Optionally, the switch assembly further includes a switch motor connected to the rotating member and a reverse position switch connected to the switch motor; the switch motor is adapted to drive the rotating member to rotate in the reverse direction; the rotating member is adapted to abut against the reverse position switch when rotating in the reverse direction and driving the moving member to move in the reverse direction to close the outlet; the switch motor is also adapted to stop the rotating member from rotating in the reverse direction when the rotating member abuts against the reverse position switch.

[0013] Optionally, the housing has a first groove; the movable member is disposed in the first groove and is adapted to be limited to moving forward or backward within the first groove.

[0014] Optionally, the housing has a second groove; the rotating member is disposed in the second groove and is adapted to be limited to rotating in the second groove in a forward or reverse direction.

[0015] Compared with the prior art, the technical solution of this application has beneficial effects.

[0016] For example, a switch assembly including a moving part and a rotating part is provided at the outlet of the housing. By controlling the rotating part to rotate forward or reverse to drive the moving part to move forward or backward, the outlet can be opened or closed. This is not only easy to operate and control, but also helps to ensure good sealing of the outlet.

[0017] For example, by providing a first groove on the housing and adapting the moving part to be inserted or pulled out of the first groove along its direction of movement, the quick installation and removal of the moving part is achieved. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the powder reagent dispensing device in the embodiments of this application;

[0019] Figure 2 This is a longitudinal sectional view of the powder reagent dispensing device in an embodiment of this application;

[0020] Figure 3 This is a schematic diagram of the powder reagent dispensing device with its bottom facing upwards in an embodiment of this application, wherein the switch assembly closes the outlet of the housing;

[0021] Figure 4 This is another schematic diagram of the powder reagent dispensing device with the bottom facing upward in the embodiments of this application, wherein the switch assembly opens the outlet of the housing;

[0022] Figure 5 This is a partially enlarged schematic diagram of the powder reagent dispensing device with its bottom facing upwards in an embodiment of this application, wherein the switch assembly closes the outlet of the housing;

[0023] Figure 6 This is a partial schematic diagram of the powder reagent dispensing device at the rotating part in an embodiment of this application, in which the outlet of the housing is closed;

[0024] Figure 7 This is another partial schematic diagram of the powder reagent dispensing device at the rotating part in an embodiment of this application, in which the outlet of the housing is open.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Powder reagent dispensing device; 10. Housing; 11. Outlet; 12. First groove; 13. Second groove; 20. Screw; 21. One end of the screw; 30. Switch assembly; 31. Moving part; 311. Opening of moving part; 312. Sealing part of moving part; 32. Rotating part; 321. Rotating center; 322. First abutment part; 323. Rotating shaft; 324. First arm; 325. Second arm; 326. Movable groove; 327. Third arm; 328. Second abutment part; 33. Fixing part; 331. Opening of fixing part; 34. Tension spring; 341. Fixed end; 342. Moving end; 35. Switch motor; 36. Forward position switch; 37. Reverse position switch; 41. Lifting motor; 42. Connecting arm; 43. Clutch gear set; 431. First clutch gear; 432. Second clutch gear; 44. Rotating motor; 45. Transmission assembly; 451. First synchronous pulley; 452. Synchronous belt; 453. Second synchronous pulley. Detailed Implementation

[0027] To make the objectives, features, and beneficial effects of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described below are merely for explaining this application and not for limiting it. Furthermore, descriptions of identical or similar components in different embodiments, as well as descriptions of components, features, effects, etc., belonging to the prior art, may be omitted.

[0028] Furthermore, for ease of description, the accompanying drawings may only show the parts relevant to this application, rather than the entire structure. Also, the same or similar reference numerals may be used in the drawings to refer to the same or similar components in different embodiments.

[0029] Figure 1 This is a schematic diagram of the structure of the powder reagent dispensing device in the embodiments of this application; Figure 2 This is a longitudinal sectional view of the powder reagent dispensing device in an embodiment of this application; Figure 3 This is a schematic diagram of the powder reagent dispensing device with its bottom facing upwards in an embodiment of this application, wherein the switch assembly closes the outlet of the housing; Figure 4 This is another schematic diagram of the powder reagent dispensing device with the bottom facing upward in the embodiments of this application, wherein the switch assembly opens the outlet of the housing; Figure 5 This is a partially enlarged schematic diagram of the powder reagent dispensing device with its bottom facing upwards in an embodiment of this application, wherein the switch assembly closes the outlet of the housing; Figure 6 This is a partial schematic diagram of the powder reagent dispensing device at the rotating part in an embodiment of this application; Figure 7 This is another partial schematic diagram of the powder reagent dispensing device at the rotating part in the embodiments of this application.

[0030] Reference Figures 1 to 7 This application provides a powder reagent dispensing device 1.

[0031] Specifically, the powder reagent dispensing device 1 includes a housing 10, a screw 20, and a switching assembly 30. The housing 10 is adapted to contain powder reagents and includes an outlet 11 adapted to dispensing the powder reagents; the screw 20 is disposed within the housing 10 and adapted to rotate to convey the powder reagents to the outlet 11; the switching assembly 30 is disposed corresponding to the outlet 11 and adapted to move to open or close the outlet 11; furthermore, the rotational speed of the screw 20 is adjustable, and the dosage of powder reagents conveyed by the screw 20 can be adjusted by regulating the rotational speed of the screw 20.

[0032] In some embodiments, the outlet 11 is located at the bottom of the housing 10. Accordingly, the screw 20 is disposed from top to bottom within the housing 10 and is adapted to convey the powdered reagent within the housing 10 from top to bottom to the outlet 11.

[0033] In practice, the rotational speed of screw 20 is adjustable. Furthermore, the dosage of powdered reagent output from housing 10 can be controlled by adjusting the rotational speed of screw 20. It can be understood that the faster the screw 20 rotates, the greater the dosage of powdered reagent output per unit time; conversely, the slower the screw 20 rotates, the smaller the dosage of powdered reagent output per unit time.

[0034] In some embodiments, the switch assembly 30 is mounted outside the housing 10 and is configured to open or close the outlet 11 corresponding to the outlet 11 of the housing 10.

[0035] In some embodiments, the switch assembly 30 includes a moving member 31 and a rotating member 32. The moving member 31 includes a moving member opening 311 and a moving member closing portion 312 and is adapted to move such that the moving member opening 311 is aligned with the outlet 11 to open the outlet 11, and to move in the opposite direction such that the moving member closing portion 312 is aligned with the outlet 11 to close the outlet 11. The rotating member 32 is adapted to rotate in the forward direction to drive the moving member 31 to move in the forward direction, and to rotate in the reverse direction to drive the moving member 31 to move in the reverse direction.

[0036] In some embodiments, the movable member 31 can be an elongated plate structure, wherein a hole corresponding to the outlet 11 is provided as the movable member opening 311; correspondingly, the portion of the plate structure adapted to close the outlet 11 when it moves in the reverse direction serves as the movable member sealing portion 312.

[0037] In practice, the size of the sealing part 312 of the moving part is larger than the size of the outlet 11 to ensure that the outlet 11 is well sealed when closed.

[0038] In some embodiments, a first groove 12 is provided on the outer side wall of the housing 10 corresponding to the location of the outlet 11 to accommodate the movable member 31.

[0039] Furthermore, the movable member 31 is adapted to be confined within the first groove 12. The first groove 31 is also adapted to define the movement trajectory of the movable member 31 therein. That is, the movable member 31 can only move in a predetermined direction or in the opposite direction within the first groove 12.

[0040] In a specific implementation, the movable part 31 is adapted to be inserted into or pulled out of the first groove 12 along its moving direction to achieve quick installation and disassembly.

[0041] In a specific implementation, the outlet 11 is located within the first groove 12. When the moving member 31 moves within the first groove 12, the opening 311 of the moving member is aligned with the outlet 11 to open the outlet 11; when the moving member 31 moves in the opposite direction within the first groove 12, the sealing part 312 of the moving member is aligned with the outlet 11 to close the outlet 11.

[0042] In this embodiment, the specific direction of the forward movement of the movable member 31 is not limited, as long as it can be configured such that the opening 311 of the movable member corresponds to the outlet 11 to open the outlet 11 when moving, and the sealing part 312 of the movable member corresponds to the outlet 11 to close the outlet 11 when moving in the reverse direction.

[0043] In some embodiments, a second groove 13 is also provided on the outer side wall of the housing 10 to accommodate the rotating member 32 and allow the rotating member 32 to rotate within the second groove 13.

[0044] In a specific implementation, the rotating member 32 is adapted to rotate in the forward direction to drive the moving member 31 to move in the forward direction, and to rotate in the reverse direction to drive the moving member 31 to move in the reverse direction.

[0045] In this embodiment, the specific direction of rotation of the rotating member 32 is not limited, as long as it satisfies the requirement of forward rotation to drive the moving member 31 to move forward and reverse rotation to drive the moving member 31 to move in the opposite direction.

[0046] In some embodiments, the switch assembly 30 further includes a tension spring 34. The two ends of the tension spring 34 are a fixed end 341 and a movable end 342, respectively. The fixed end 341 is fixed relative to the housing 10; the movable end 342 is connected to the movable member 31.

[0047] In some embodiments, the switch assembly 30 further includes a retainer 33 mounted on the housing 10. The retaining end 341 of the tension spring 34 is fixed relative to the housing 10 by being fixedly connected to the retainer 33.

[0048] In some embodiments, the fixing member 33 is adapted to cover the outside of the moving member 31.

[0049] In a specific implementation, the movable end 342 of the tension spring 34 is adapted to be abutted by the rotating member 32 when the rotating member 32 rotates in the forward direction, thereby driving the movable member 31 to move in the forward direction and stretching the tension spring 34 under the drive of the rotating member 32. The tension spring 34 is adapted to restore the stretch when the rotating member 32 rotates in the reverse direction, and drive the movable member 31 to move in the reverse direction through its movable end 342.

[0050] In a specific implementation, the movable member 31 is adapted to move forward so that the opening 311 of the movable member is aligned with the outlet 11 to open the outlet 11, and to move in reverse so that the sealing part 312 of the movable member is aligned with the outlet 11 to close the outlet 11.

[0051] As previously mentioned, in some embodiments, a first groove 12 is provided on the outer side wall of the housing 10 corresponding to the location of the outlet 11 to accommodate the movable member 31. In this case, the fixing member 33 can also be accommodated in the first groove 12 and cover the outside of the movable member 31.

[0052] In a specific implementation, the fixing member 33 includes a fixing member opening 331 corresponding to the outlet 11. When the moving member 31 moves forward to open the outlet 11 so that the moving member opening 311 corresponds to the outlet 11, the outlet 11 of the housing 10, the moving member opening 311 of the moving member 31, and the fixing member opening 331 of the fixing member 33 are correspondingly arranged to allow the powder reagent in the housing 10 to be output outward sequentially through the outlet 11, the moving member opening 311, and the fixing member opening 331.

[0053] In some embodiments, the rotating member 32 includes a rotation center portion 321 and a first abutment portion 322. The rotation center portion 321 is rotatably mounted within a second groove 13 on the outer wall of the housing 10 via a pivot 323, allowing the rotating member 32 to rotate within the second groove 13. The first abutment portion 322 corresponds to the moving end 342 of the tension spring 34 and is adapted to abut against the moving end 342 of the tension spring 34 when the rotating member 32 rotates in the forward direction.

[0054] In some embodiments, the rotating member 32 may have an approximately fan-shaped structure. Furthermore, the rotation center 321 of the rotating member 32 is located at the center of the fan shape.

[0055] Furthermore, the rotating member 32 also has a first arm 324 extending radially outward from its arcuate edge along the fan shape, and the first arm 324 includes a first abutment portion 322. When the first arm 324 rotates forward with the rotating member 32, the first abutment portion 322 abuts against the moving end 324 of the tension spring 34.

[0056] In a specific implementation, the second groove 13 and the first groove 12 are arranged adjacent to each other and are at least partially connected. Accordingly, the tension spring 34 is located between the second groove 13 and the first groove 12. When the first abutting part 322 of the first arm 324 abuts against the moving end 342 of the tension spring 34, as the rotating member 32 continues to rotate in the forward direction, the end of the first arm 324 can rotate from the second groove 13 to the first groove 12.

[0057] In some embodiments, the rotating member 32 further has a second arm 325 extending radially outward from the arcuate edge of the fan shape. The second arm 325 is disposed adjacent to the first arm 324, and the two, together with the arcuate edge of the fan shape, are adapted to form a movable groove 326. When the first abutting portion 322 of the first arm 324 abuts against the moving end 342 of the tension spring 34, the moving end 342 of the tension spring 34 is adapted to be received within the movable groove 326 and to move radially within the movable groove 326.

[0058] As the rotating member 32 rotates and comes into contact with the moving end 342 of the tension spring 34, the distance between the rotation center 321 of the rotating member 32 and the moving end 342 of the tension spring 34 gradually changes. Specifically, the distance first decreases and then increases.

[0059] Because the distance between the rotation center 321 of the rotating member 32 and the moving end 342 of the tension spring 34 gradually changes during the rotation of the rotating member 32 and its contact with the moving end 342 of the tension spring 34, the contact position between the moving end 342 of the tension spring 34 and the first contact portion 322 also gradually changes.

[0060] In specific implementation, the first abutting part 322 is located within the movable groove 326. That is, the abutting position of the first abutting part 322 against the moving end 342 of the tension spring 34 and the gradually changing abutting position are all located within the movable groove 326. During the rotation of the rotating member 32 and its contact with the moving end 342 of the tension spring 34, as the distance between the rotation center 321 of the rotating member 32 and the moving end 342 of the tension spring 34 gradually changes, the moving end 342 of the tension spring 34 is adapted to move within the movable groove 326. Specifically, within the movable groove 326, the moving end 342 of the tension spring 34 first moves towards the rotation center 321 and then moves away from the rotation center 321.

[0061] In a specific implementation, the length of the second arm 325 is less than the length of the first arm 324, so that the moving end 342 of the tension spring 34 can enter the movable groove 326 or disengage from the movable groove 326 along the end of the second arm 325.

[0062] As previously described, the tension spring 34 is adapted to restore the tension when the rotating member 32 rotates in the opposite direction, and to drive the moving member 31 to move in the opposite direction via its moving end 342.

[0063] In some embodiments, the force of the tension spring 34 restoring its tension is insufficient to drive the moving member 31 to move in the opposite direction, or insufficient to drive the moving member 31 to move in the opposite direction back to the initial position. In this case, the rotating member 32 also has a third arm 327 extending radially outward from its arcuate edge along the fan shape.

[0064] In a specific implementation, the third arm 327 is positioned away from the first arm 325 and includes a second abutment portion 328. When the rotating member 32 rotates in the reverse direction, the second abutment portion 328 is adapted to abut against the moving end 342 of the tension spring 34 to drive the moving end 342 to move the moving member 31 in the reverse direction until it returns to its initial position.

[0065] When the moving part 31 moves in the reverse direction to the initial position, the sealing part 312 of the moving part is set to correspond with the outlet 11 and close the outlet 11.

[0066] In some embodiments, the switching assembly 30 further includes a switching motor 35 connected to the rotating member 32, so as to drive the rotating member 32 to rotate forward or backward. In a specific implementation, the switching motor 35 can be driven to the rotating member 32 via a rotating shaft 323.

[0067] In some embodiments, the switch assembly 30 further includes a forward position switch 36 connected to the switch motor 35 and mounted on the outer wall of the housing 10. The forward position switch 36 is adapted to abut against the rotating member 32 when the rotating member 32 rotates forward and drives the moving member 31 to move forward to open the outlet 11. Accordingly, the switch motor 35 is also adapted to control the rotating member 32 to stop rotating forward when the forward position switch 36 abuts against the rotating member 32.

[0068] It is understandable that when the switch motor 35 controls the rotating part 32 to stop rotating in the forward direction, the outlet 11 is just opened.

[0069] When outlet 11 is opened, the powdered reagent inside the housing 10 can be discharged from outlet 11 by rotating screw 20, for example, into a container below outlet 11. After the powdered reagent has been discharged, outlet 11 needs to be closed to prevent leakage of the powdered reagent inside the housing 10.

[0070] In some embodiments, the rotating member 32 can be controlled to start rotating in the reverse direction by switching the motor 35. When the rotating member 32 starts rotating in the reverse direction, the tension spring 34 is adapted to restore its tension and drive the moving member 31 to move in the reverse direction through its moving end 342, so that the sealing part 312 of the moving member is aligned with the outlet 11 and the outlet 11 is closed.

[0071] In some embodiments, the tension spring 34 recovers its tensile force sufficiently to drive the moving member 31 to move in the opposite direction. In this case, the switching motor 35 may idle.

[0072] As previously described, in some embodiments, the restoring force of the tension spring 34 is insufficient to drive the moving member 31 to move in the opposite direction, or insufficient to drive the moving member 31 to move in the opposite direction back to the initial position. In this case, the moving end 342 of the tension spring 34 is abutted and driven by the second abutment portion 328 of the third arm 327, so as to drive the moving member 31 to move in the opposite direction until it returns to the initial position.

[0073] In some embodiments, the switch assembly 30 further includes a reverse position switch 37 connected to the switch motor 35 and mounted on the outer wall of the housing 10. The reverse position switch 37 is adapted to abut against the rotating member 32 when the rotating member 32 rotates in the reverse direction and drives the moving member 31 to move in the reverse direction to close the outlet 11. Accordingly, the switch motor 35 is also adapted to control the rotating member 32 to stop rotating in the reverse direction when the reverse position switch 37 abuts against the rotating member 32.

[0074] As previously described, in some embodiments, the rotating member 32 has a fan-shaped structure. In this case, the radial side of the rotating member 32 near the first arm 324 is adapted to abut against the reverse position switch 37. Correspondingly, the other radial side of the rotating member 32 near the third arm 327 is adapted to abut against the forward position switch 36.

[0075] In a specific implementation, when the rotating member 32 rotates in the reverse direction and comes into contact with the reverse position switch 37, the switch motor 35 is adapted to control the rotating member 32 to stop rotating in the reverse direction. At this time, the moving member 31 moves in the reverse direction so that the sealing part 312 of the moving member is set to correspond to the outlet 11 of the housing 10 and the outlet 11 is closed.

[0076] When the rotating member 32 rotates in the forward direction and comes into contact with the forward position switch 36, the switch motor 35 is adapted to control the rotating member 32 to stop rotating in the forward direction. At this time, the moving member 31 moves in the forward direction so that the opening 311 of the moving member is set to correspond to the outlet 11 of the housing 10 and the outlet 11 is opened.

[0077] In some embodiments, when the powder reagent dispensing device 1 starts working, or before the powder reagent is filled into the housing 10 of the powder reagent dispensing device 1, or before the powder reagent dispensing device 1 starts dispensing powder reagent, the rotating member 32 can be controlled to rotate in the reverse direction by the switching motor 35 so that the moving member 31 returns to its initial position first, thereby closing the outlet 11 of the housing 10. In this way, leakage of powder reagent in the powder reagent dispensing device 1 due to the opening of the outlet 11 of the housing 10 can be prevented.

[0078] As mentioned above, when outlet 11 is opened, the powdered reagent inside the housing 10 can be output from outlet 11 by rotating screw 20, for example, into a container below outlet 11.

[0079] In some embodiments, the upper end 21 of the screw 20 may extend outside the housing 10. Accordingly, the powder reagent dispensing device 1 further includes a lifting motor 41 and a connecting arm 42 connected to the lifting motor 41. The lifting motor 41 is adapted to drive the connecting arm 42 toward one end 21 of the screw 20, for example, to drive the connecting arm 42 downward toward the upper end of the screw 20 so that the connecting arm 42 connects with the upper end 21 of the screw 20, or to drive the connecting arm 42 away from one end 21 of the screw 20, for example, to drive the connecting arm 42 upward away from the upper end of the screw 20 so that the connecting arm 42 separates from the upper end 21 of the screw 20.

[0080] In some embodiments, the connecting arm 42 and the upper end 21 of the screw 20 are connected by a clutch gear set 43. Furthermore, the powder reagent dispensing device 1 also includes a rotary motor 44 connected to the clutch gear set 43, so as to drive the clutch gear set 43 to rotate, thereby driving the screw 20 to rotate via the clutch gear set 43.

[0081] In some embodiments, the clutch gear set 43 includes a first clutch gear 431 and a second clutch gear 432 respectively disposed on the upper end 21 of the connecting arm 42 and the screw 20. Furthermore, the first clutch gear 431 and the second clutch gear 432 are adapted to mesh to connect the connecting arm 42 and the upper end 21 of the screw 20.

[0082] In some embodiments, the rotating motor 44 is connected to the first clutch gear 431 via the transmission assembly 45 and drives the first clutch gear 431 to rotate, so as to drive the second clutch gear 432 through the first clutch gear 431, and then drive the screw 20 to rotate through the second clutch gear 432.

[0083] In some embodiments, the transmission assembly 45 includes a first synchronous pulley 451, a synchronous belt 452, and a second synchronous pulley 453. The first synchronous pulley 451 is connected to the output shaft of the rotary motor 44 and is adapted to rotate synchronously with the output shaft; the second synchronous pulley 453 is connected to a first clutch gear 431 and is adapted to rotate synchronously with the first clutch gear 431; the synchronous belt 452 is sleeved on the first synchronous pulley 451 and the second synchronous pulley 453 and is adapted to transmit the rotation of the first synchronous pulley 451 to the second synchronous pulley 453, thereby driving the first clutch gear 431 to rotate via the rotary motor 44.

[0084] In practice, the timing belt 452 can be arranged around the connecting arm 42.

[0085] As mentioned earlier, the rotational speed of screw 20 is adjustable. Furthermore, the dosage of the powdered reagent output can be controlled by adjusting the rotational speed of screw 20. In this case, a weighing unit, such as a balance, can be installed below the container receiving the powdered reagent to weigh the powdered reagent within the container.

[0086] Furthermore, the powder reagent dispensing device 1 may also include a processor connected to both the rotary motor 44 and a weighing unit, such as a balance. In a specific implementation, the processor is adapted to adjust the rotational speed of the screw 20 via the rotary motor 44 based on the dosage of the powder reagent in the container weighed by the weighing unit, such as the balance, and thereby adjust the dosage of the powder reagent output to the container based on the rotational speed of the screw 20.

[0087] In this way, the output dosage of powdered reagents can be precisely controlled.

[0088] Although specific embodiments of this application have been described above, these embodiments are not intended to limit the scope of this application, even when only a single embodiment is described with respect to a particular feature. The examples of features provided in this application are intended to be illustrative and not limiting, unless otherwise stated. In practice, one or more technical features of dependent claims may be combined with technical features of independent claims as needed and where technically feasible, and the technical features of corresponding claims may be combined in any suitable manner rather than solely by the specific combinations listed in the claims.

[0089] While this application discloses the above information, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of this application; therefore, the scope of protection of this application shall be determined by the scope defined in the claims.

Claims

1. A powder reagent dispensing device (1), characterized in that, include: A housing (10) adapted to contain a powdered reagent and including an outlet (11) adapted to dispensing the powdered reagent. A switch assembly (30) is provided corresponding to the outlet (11) and is adapted to move to open or close the outlet (11). The switching assembly (30) includes: The movable part (31) includes a movable part opening (311) and a movable part sealing part (312) and is adapted to move forward so that the movable part opening (311) corresponds to the outlet (11) to open the outlet (11), and move backward so that the movable part sealing part (312) corresponds to the outlet (11) to close the outlet (11). Rotating member (32), which is adapted to rotate in the forward direction to drive the moving member (31) to move in the forward direction, and to rotate in the reverse direction to drive the moving member (31) to move in the reverse direction; The switch assembly (30) further includes a tension spring (34); the two ends of the tension spring (34) are a fixed end (341) and a movable end (342), respectively; the fixed end (341) is fixed relative to the housing (10); the movable end (342) is connected to the movable member (31) and is adapted to be abutted by the rotating member (32) when the rotating member (32) rotates in the forward direction so as to drive the movable member (31) to move in the forward direction under the drive of the rotating member (32) and stretch the tension spring (34); the tension spring (34) is adapted to restore the stretch when the rotating member (32) rotates in the reverse direction and drive the movable member (31) to move in the reverse direction through the movable end (342).

2. The powder reagent dispensing device (1) according to claim 1, characterized in that, The rotating member (32) has a fan-shaped structure and includes a rotation center (321) located at the center of the fan and a first arm (324) extending radially outward from the arc edge of the fan; the rotating member (32) is adapted to rotate around the rotation center (321); the first arm (324) is adapted to abut against the moving end (342) during the forward rotation of the rotating member (32).

3. The powder reagent dispensing device (1) according to claim 2, characterized in that, The rotating member (32) further includes a second arm (325) extending radially outward from the arc edge of the sector; the second arm (325) is disposed adjacent to the first arm (324), and the two together with the arc edge are adapted to form a movable groove (326); when the first arm (324) abuts against the moving end (342), the moving end (342) is adapted to be received in the movable groove (326) and move therein in the radial direction of the sector.

4. The powder reagent dispensing device (1) according to claim 3, characterized in that, The length of the second arm (325) is less than the length of the first arm (324) so ​​that the movable end (342) is adapted to enter or disengage from the movable slot (326) from the end of the second arm (325).

5. The powder reagent dispensing device (1) according to claim 2, characterized in that, The rotating member (32) further includes a third arm (327) extending radially outward from the arc edge of the sector; the third arm (327) is disposed away from the first arm (324) and is adapted to abut against the moving end (342) as the rotating member (32) rotates in the opposite direction to drive the moving member (31) to move in the opposite direction.

6. The powder reagent dispensing device (1) according to claim 1, characterized in that, The switch assembly (30) further includes a switch motor (35) connected to the rotating member (32) and a forward position switch (36) connected to the switch motor (35); the switch motor (35) is adapted to drive the rotating member (32) to rotate forward; the rotating member (32) is adapted to abut against the forward position switch (36) when rotating forward and driving the moving member (31) to move forward to open the outlet (11); the switch motor (35) is also adapted to stop the rotating member (32) from rotating forward when it abuts against the forward position switch (36).

7. The powder reagent dispensing device (1) according to claim 1, characterized in that, The switch assembly (30) further includes a switch motor (35) connected to the rotating member (32) and a reverse position switch (37) connected to the switch motor (35); the switch motor (35) is adapted to drive the rotating member (32) to rotate in the opposite direction; the rotating member (32) is adapted to abut against the reverse position switch (37) when rotating in the opposite direction and driving the moving member (31) to move in the opposite direction to close the outlet (11); the switch motor (35) is also adapted to stop the rotating member (32) from rotating in the opposite direction when the rotating member (32) abuts against the reverse position switch (37).

8. The powder reagent dispensing device (1) according to claim 1, characterized in that, The housing (10) has a first groove (12); the movable member (31) is disposed in the first groove (12) and is adapted to be limited to move forward or backward within the first groove (12).

9. The powder reagent dispensing device (1) according to claim 1, characterized in that, The housing (10) has a second groove (13); the rotating member (32) is disposed in the second groove (13) and is adapted to be limited to rotating in the second groove (13) in the forward or reverse direction.

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