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CN-115508574-B - Sample adding device

CN115508574BCN 115508574 BCN115508574 BCN 115508574BCN-115508574-B

Abstract

The invention provides a sample adding device. The sample adding device comprises a container, a sample adding mechanism, a driving mechanism and a control mechanism, wherein the container is suitable for containing reagents, the sample adding mechanism is at least partially arranged in the container and comprises a first screw rod and a second screw rod which are in meshed transmission, the first screw rod is suitable for receiving the reagents in the container and conveying the reagents to the second screw rod, the second screw rod is suitable for conveying the reagents to the outside and the inside of the container, the driving mechanism is connected with the first screw rod and is suitable for driving the first screw rod to rotate along a first direction, and meanwhile the second screw rod is driven to rotate along a second direction through the first screw rod, and the second direction is opposite to the first direction. By adopting the invention, not only the automation of reagent sampling is realized, but also the synchronous sample feeding and sample returning is realized through the same driving mechanism, thereby saving an extra driving source and the occupied space and cost of the product.

Inventors

  • ZHUO LI

Assignees

  • 时新(上海)产品设计有限公司

Dates

Publication Date
20260505
Application Date
20220929

Claims (6)

  1. 1. A sample application device (300), comprising: a container (211) adapted to contain a reagent; -a sampling mechanism (100) disposed at least partially within the container (211) and comprising a first screw (112) and a second screw (114) driven in intermesh, the first screw (112) being adapted to receive a reagent within the container (211) and to deliver the reagent to the second screw (114), the second screw (114) being adapted to deliver the reagent to the outside and inside of the container (211); A drive mechanism (310) coupled to the first screw (112) and adapted to drive the first screw (112) to rotate in a first direction while simultaneously rotating the second screw (114) in a second direction through the first screw (112), wherein the second direction is opposite the first direction, wherein, The sampling mechanism (100) further comprises a first channel (111), the first channel (111) having a first channel first opening (111 a) in communication with the container (211) for allowing reagent in the container (211) to enter the first channel (111) and a first channel second opening (111 b) in communication with the outside of the first channel (111) for allowing the reagent to leave the first channel (111), the first screw (112) being arranged in the first channel (111) and adapted to rotate in the first direction for transporting reagent in the first channel (111) to the first channel second opening (111 b) and for controlling the mass flow of the reagent leaving through the first channel second opening (111 b) by adjusting the rotational speed of itself, the sampling mechanism (100) further comprises a second channel (113), the second channel (113) having a second channel second opening (113 a) in communication with the first channel second opening (111 b) for allowing the reagent in the first channel (111) to leave the outside of the second channel (113) and allowing the second channel (113 a) to communicate with the second channel (113 b) in the first channel second opening, and a second channel third opening (113 c) in communication with the container (211) to allow the reagent to leave the second channel (113) back to the container (211), the second screw (114) being disposed within the second channel (113) and adapted to rotate in the second direction to deliver the reagent within the second channel (113) to the second channel second opening (113 b) and the second channel third opening (113 c).
  2. 2. The sample addition device (300) according to claim 1, wherein the sample addition device (300) further comprises a face cam (115) coaxially connected to the first screw (112) and a first gear (116) coaxially connected to the second screw (114), wherein the face cam (115) is in meshed driving connection with the first gear (116) and is adapted to rotate in the first direction under the drive of the first screw (112) to drive the first gear (116) to rotate the second screw (114) in the second direction.
  3. 3. The sample loading device (300) according to claim 1 or 2, wherein the driving mechanism (310) comprises a driving motor (311), a second gear (312) coaxially connected with the driving motor (311), and a third gear (313) in meshed transmission connection with the second gear (312), the third gear (313) is coaxially connected with the first screw (112), and the second gear (312) is suitable for being driven by the driving motor (311) to rotate and driving the third gear (313) to drive the first screw (112) to rotate along the first direction.
  4. 4. The sample addition device (300) according to claim 1, wherein the first screw (112) is adapted to be driven by the drive mechanism (310) to rotate in the first direction at a first speed, wherein the container (211) is adapted to be driven by the drive mechanism (310) to rotate in the first direction at a second speed when the first screw (112) is rotated in the first direction at the first speed, wherein the second speed is less than the first speed.
  5. 5. The sample loading device (300) according to claim 4, wherein the drive mechanism (310) comprises a drive motor (311), a second gear (312) coaxially connected with the drive motor (311), a third gear (313) and a fourth gear (314) respectively in meshed driving connection with the second gear (312), the third gear (313) is coaxially connected with the first screw (112), the fourth gear (314) is in driving connection with the container (211), the second gear (312) is adapted to rotate under the drive of the drive motor (311) and drive the third gear (313) to rotate the first screw (112) in the first direction, and drive the fourth gear (314) to rotate the container (211) in the second direction, wherein the diameter ratio of the third gear (313) to the fourth gear (314) is equal to the speed ratio of the second speed to the first speed.
  6. 6. The sample addition device (300) according to claim 1, wherein the first channel first opening (111 a) is located at a middle side portion of the first channel (111), the first channel second opening (111 b) is located at a lower side portion of the first channel (111), the second channel first opening (113 a) is located at a lower side portion of the second channel (113), the second channel second opening (113 b) is located at a bottom end of the second channel (113), and the second channel third opening (113 c) is located at an upper side portion of the second channel (113).

Description

Sample adding device Technical Field The invention relates to the technical field of weighing and sampling, in particular to a sample adding device. Background It is well known that in biochemical experiments, it is often necessary to perform a weighing and sampling operation on reagents, especially powdered reagents. However, the weighing balance commonly used at present not only needs manual operation, but also has low accuracy and large error. Moreover, since the manual operation is performed, the sample is taken by the sense of a person every time the operation is performed, and thus it may be difficult to achieve an ideal weighing and sampling effect through a plurality of operations. In addition, due to manual operation, the reagent may be dropped or scattered during the movement of the sample, which may not only result in reagent waste, but also may cause reagent pollution. Thus, automated sampling devices are becoming more favored by laboratory personnel, however, automated sampling devices in the prior art are often complex in structural design, not only are bulky, costly, but also are prone to causing the accumulation of reagents. Disclosure of Invention The embodiment of the invention provides a sample adding device, which not only realizes the automation of reagent sampling through a rotating screw rod, but also simultaneously drives a first screw rod and a second screw rod which are in meshed transmission connection through adopting the same driving mechanism, so that the synchronous operation of sample feeding (namely reagent output) and sample returning (namely reagent returning to a container) is realized, and on the other hand, an additional driving source is omitted, and the occupied space and the cost of a product are saved. Therefore, the embodiment of the invention provides the following technical scheme: the embodiment of the invention provides a sample adding device. The sample adding device comprises a container, a sample adding mechanism, a driving mechanism and a sample adding mechanism, wherein the container is suitable for containing a reagent, the sample adding mechanism is at least partially arranged in the container and comprises a first screw rod and a second screw rod which are in meshed transmission, the first screw rod is suitable for receiving the reagent in the container and conveying the reagent to the second screw rod, the second screw rod is suitable for conveying the reagent to the outside and the inside of the container, the driving mechanism is connected with the first screw rod and is suitable for driving the first screw rod to rotate along a first direction, and meanwhile the first screw rod is used for driving the second screw rod to rotate along a second direction, and the second direction is opposite to the first direction. Optionally, the sample adding device further comprises an end cam coaxially connected with the first screw rod and a first gear coaxially connected with the second screw rod, wherein the end cam is in meshed transmission connection with the first gear and is suitable for being driven by the first screw rod to rotate along the first direction so as to drive the first gear to drive the second screw rod to rotate along the second direction. Optionally, the driving mechanism comprises a driving motor, a second gear coaxially connected with the driving motor and a third gear in meshed transmission connection with the second gear, the third gear is coaxially connected with the first screw, and the second gear is suitable for being driven by the driving motor to rotate and drives the third gear to drive the first screw to rotate along the first direction. Optionally, the first screw is adapted to be driven by the drive mechanism to rotate in the first direction at a first speed, and the container is adapted to be driven by the drive mechanism to rotate in the first direction at a second speed when the first screw is rotated in the first direction at the first speed, wherein the second speed is less than the first speed. The driving mechanism comprises a driving motor, a second gear, a third gear and a fourth gear, wherein the second gear is coaxially connected with the driving motor, the third gear and the fourth gear are respectively in meshed transmission connection with the second gear, the third gear is coaxially connected with the first screw, the fourth gear is in transmission connection with the container, the second gear is suitable for being driven by the driving motor to rotate and drive the third gear to drive the first screw to rotate at the first speed along the first direction, the fourth gear is driven to drive the container to rotate at the second speed along the first direction, and the diameter ratio of the third gear to the fourth gear is equal to the speed ratio of the second speed to the first speed. Optionally, the sampling mechanism further comprises a first channel having a first channel first opening in communication with