Test tube rotating mechanism and test tube rotating code scanning device

Abstract

The present invention relates to the technical field of medical devices, and provides a test tube rotating mechanism, including a fixed block, a clamping rotating assembly and a cam groove are arranged on the fixed block, the clamping rotating assembly includes a motor, a driving shaft, a cam, a one-way bearing, and a rotating gear, the motor drives the driving shaft to rotate, the driving shaft drives the rotating gear to rotate, the driving shaft is connected to the cam through the one-way bearing and drives the cam to rotate, the cam groove is provided with a cam retaining edge, and the circumferential surface of the cam is always in contact with the cam retaining edge. The driving shaft drives the cam to rotate by utilizing the one-way locking characteristic of the one-way bearing, so that the cam drives the driving shaft to approach the sample test tube and the rotating gear clamps the sample test tube, and then utilizes the bearing effect of the one-way bearing to prevent the cam from rotating with the driving shaft, while the driving shaft drives the rotating gear to clamp the sample test tube and drive the sample test tube to rotate, so that the sample test tube can be accurately clamped and the test tube can be driven to rotate without using an electromagnet.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and more specifically to a test tube rotating mechanism and a test tube rotating code scanning device. Background Art

[0002] During blood tests, test tubes with barcodes are distributed to different instruments for related tests. The barcodes contain the patient's personal information, and the hospital needs to identify the barcodes on the test tubes. The barcoded sample tubes are first placed on the test tube rack and then into the automatic sample loading station of the testing instrument. When the user places the sample tube, the barcode may not be facing the scanner, so the sample tube needs to be rotated so that the barcode faces the scanner.

[0003] At present, the mechanism for rotating the sample tube on the market usually adopts the method of clamping the sample tube by electromagnet and rotating the sample tube by motor. Because the electromagnet moves too fast, it will cause a lot of noise. In addition, the electromagnet can only generate the ideal electromagnetic force when it reaches the specified position, so there is a situation where the motor cannot drive the sample to rotate. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a test tube rotating mechanism which can accurately clamp a sample test tube and drive the test tube to rotate without using an electromagnet.

[0005] The technical solution of the present invention is to provide a test tube rotation mechanism, including a fixed block, on which a clamping rotation assembly and a cam groove are arranged, the clamping rotation assembly includes a motor, a driving shaft, a cam, a one-way bearing, and a rotating gear, the motor drives the driving shaft to rotate, the driving shaft drives the rotating gear to rotate, the driving shaft is connected to the cam through the one-way bearing and drives the cam to rotate, the cam groove is provided with a cam guard, and the circumferential surface of the cam is always in contact with the cam guard.

[0006] Compared with the prior art, the test tube rotating mechanism of the present invention has the following advantages: the driving shaft is connected to the cam through a one-way bearing, and the one-way locking characteristic of the one-way bearing is used to drive the cam to rotate, so that the cam drives the driving shaft to approach the sample test tube and finally causes the rotating gear to clamp the sample test tube, and then the bearing effect of the one-way bearing is used to prevent the cam from rotating with the driving shaft, while the driving shaft drives the rotating gear to always keep the sample test tube and drive the sample test tube to rotate, thereby achieving accurate clamping of the sample test tube and driving the test tube to rotate without using an electromagnet.

[0007] Preferably, the one-way bearing is fixed on the cam via a bearing pressure plate. With this structure, it is more reliable to utilize the one-way locking characteristic of the one-way bearing to drive the cam to rotate.

[0008] Preferably, the fixed block is further provided with a slider fixing seat, the slider fixing seat is provided with at least one slide rod, the slide rod is provided with a spring and a slider, the spring is relatively far away from the cam rib relative to the slider, the driving shaft is connected to the slider and drives the slider to slide along the slide rod and compress the spring. With this structure, it can be ensured that when the slider compresses the spring, the elastic force of the spring on the slider is transmitted to the cam via the driving shaft, so that the circumference of the cam contacts the cam rib.

[0009] Preferably, the slider is provided with an axial hole, a slider bearing is connected in the axial hole, and the driving shaft is connected to the slider through the slider bearing. With this structure, it can be ensured that the driving shaft can drive the slider to slide along the slide rod and rotate relative to the slider.

[0010] Preferably, the natural length of the spring is greater than the length difference between the slide bar and the slide block. With this structure, it can be ensured that the slide block always compresses the spring, and the elastic force of the spring on the slide block is transmitted to the cam via the driving shaft, so that the circumference of the cam always contacts the cam retaining edge.

[0011] Preferably, the slider is away from the sample tube relative to the spring. With this structure, it can be ensured that when the rotating gear clamps the sample tube, the spring is compressed to the shortest, the elastic force of the spring on the slider is the largest, the resistance between the circumference of the cam and the cam rib is the largest, and the static friction force of the cam rib on the cam is also the largest. Then, when the cam does not rotate with the driving shaft, it is ensured that the cam does not rotate, so that the driving shaft drives the rotating gear to always clamp the sample tube and drive the sample tube to rotate.

[0012] Preferably, a chopper is provided on the slider, and a slotted optical coupler for sensing the position information of the chopper is provided on one side of the fixed block corresponding to the chopper. With this structure, the slotted optical coupler can collect the position information of the slider by sensing the position of the chopper, and then determine the position information of the active shaft.

[0013] Preferably, the fixed block is also provided with a reflective optical coupler, which is used to determine whether there is a sample tube to be rotated. With this structure, it can be determined whether to start the motor according to whether there is a sample tube to be rotated.

[0014] The technical problem to be solved by the present invention is to provide a test tube rotating code scanning device which can accurately clamp the sample test tube and drive the test tube to rotate without using an electromagnet.

[0015] The technical solution of the present invention is to provide a test tube rotating code scanning device, including a scanner and any of the test tube rotating mechanisms described above, wherein the scanning window of the scanner is aligned with the side of the sample test tube for scanning the barcode attached to the sample test tube.

[0016] Compared with the prior art, the test tube rotating code scanning device of the present invention has the following advantages: the driving shaft is connected to the cam through a one-way bearing, and the one-way locking characteristic of the one-way bearing is used to drive the cam to rotate, so that the cam drives the driving shaft to approach the sample test tube and finally makes the rotating gear clamp the sample test tube, and then the bearing effect of the one-way bearing is used to prevent the cam from rotating with the driving shaft, while the driving shaft drives the rotating gear to always clamp the sample test tube and drive the sample test tube to rotate, thereby achieving accurate clamping of the sample test tube and driving the test tube to rotate without using an electromagnet. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the test tube rotating mechanism of the present invention.

[0018] Figure 2 for Figure 1 Left view of .

[0019] Figure 3 for Figure 1 BB direction view.

[0020] As shown in the figure: 1. test tube, 2. fixed block, 2-1. cam retaining edge, 3. slider fixing seat, 3-1. slide rod, 3-2. spring, 4. slider, 4-1. chopper, 5. motor, 6. driving shaft, 7. slider bearing, 8. cam, 8-1. clamping point, 9. one-way bearing, 10. rotating gear, 11. slotted optical coupler, 12. reflective optical coupler, 13. bearing pressure plate. DETAILED DESCRIPTION

[0021] In order to better understand the present application, a more detailed description of various aspects of the present application will be made with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and do not limit the scope of the present application in any way. Throughout the specification, the same figure numerals refer to the same elements.

[0022] In the drawings, the thickness, size and shape of objects have been slightly exaggerated for ease of explanation. The drawings are only examples and are not drawn strictly to scale.

[0023] It should also be understood that the terms "comprises", "having", "includes", "comprising", when used in this specification, indicate the presence of the described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof. In addition, when a statement such as "...at least one" appears after a list of listed features, it modifies the entire listed features rather than modifying the individual elements in the list.

[0024] like Figures 1 to 3As shown in, the test tube rotating mechanism of the present invention includes a fixed block 2, on which a clamping rotating assembly is arranged; the clamping rotating assembly includes a motor 5, a driving shaft 6, a cam 8, a one-way bearing 9, and a rotating gear 10, the driving shaft 6 is connected to the motor 5, the cam 8, and the rotating gear 10, the motor 5 drives the driving shaft 6 to rotate, an eccentric hole is arranged on the cam 8, a one-way bearing 9 is arranged in the eccentric hole, the one-way bearing 9 is fixed on the cam 8 through a bearing pressure plate 13, the driving shaft 6 is connected to the cam 8 through the one-way bearing 9, and the rotating gear 10 is located below the cam 8; a cam groove is arranged on the fixed block 2, and a cam retaining edge 2-1 is arranged on the side of the cam groove opposite to the test tube 1, when the cam 8 rotates in the cam groove, the circumferential surface of the cam 8 conflicts with the cam retaining edge 2-1, and the point on the circumferential surface of the cam 8 farthest from the driving shaft 6 is the clamping point 8-1. When the motor reverses, the driving shaft 6 is driven to reverse. Since the one-way bearing 9 is locked with the cam 8, the driving shaft 6 drives the one-way bearing 9 and the cam 8 to rotate synchronously in the opposite direction, so that the clamping point 8-1 approaches the cam retaining edge 2-1, that is, the cam 8 pushes the driving shaft 6 so that the driving shaft 6 drives the rotating gear 10 to move in the direction of the test tube 1 until the clamping point 8-1 conflicts with the cam retaining edge 2-1, and the rotating gear 10 clamps the test tube 1; then the motor rotates forward, driving the driving shaft 6 to rotate forward, the one-way bearing 9 only acts as a bearing, the cam 8 does not rotate with the driving shaft 6, the rotating gear 10 always clamps the test tube 1, and the driving shaft 6 drives the rotating gear 10 to rotate forward, and the rotating gear 10 engages with the test tube 1 to make the test tube 1 rotate synchronously.

[0025] The fixed block 2 is also provided with a slider fixing seat 3, a slider fixing seat 3 is provided with a slide bar 3-1, a spring 3-2 and a slider 4 are provided on the slide bar 3-1, the spring 3-2 is located on one side of the test tube 1, the slider 4 is located on one side of the cam retaining edge 2-1, the slider 4 can slide along the slide bar 3-1, the spring 3-2 can be extended and retracted along the direction of the slide bar 3-1, the natural length of the spring 3-2 is greater than the length difference between the slide bar 3-1 and the slider 4, the slider 4 always compresses the spring 3-2, the elastic force of the spring 3-2 on the slider 4 is transmitted to the cam 8 via the driving shaft 6, so that the circumference of the cam 8 always contacts the cam retaining edge 2-1. The slider 4 is also provided with an axial hole, a slider bearing 7 is connected in the axial hole, and the driving shaft 6 is connected to the slider 4 through the slider bearing 7. When the cam 8 pushes the driving shaft 6 to move in the direction of the test tube 1, the slider 4 is simultaneously moved in the direction of the test tube 1 driven by the driving shaft 6, and the spring 3-2 is gradually compressed by the slider 4. At this time, the reverse thrust of the compressed spring 3-2 on the slider 4 is transmitted to the cam 8 via the driving shaft 6, so that the resistance between the cam 8 and the cam retaining edge 2-1 is also increased, and the static friction force is also increased. When the rotating gear 10 clamps the test tube 1 and the driving shaft 6 only drives the one-way bearing 9 to rotate relative to the cam 8, the maximum static friction force generated between the cam 8 and the cam retaining edge 2-1 can ensure that the cam 8 can be prevented from rotating, so that the rotating gear 10 always clamps the test tube 1 and can drive the test tube 1 to rotate.

[0026] The slider 4 is also provided with a chopper 4-1, and a slotted optical coupler 11 is provided on one side of the fixed block 2 corresponding to the chopper 4-1. The slotted optical coupler 11 collects the position information of the slider 4 by sensing the position of the chopper 4-1, and then determines whether the active shaft 6 is in the reset position. When the test tube rotating mechanism of the present invention is powered on, restarted, or before performing the task of rotating the test tube, the active shaft 6 needs to be set in the reset position, and the reset of the active shaft 6 is completed only when the slotted optical coupler 11 senses the position of the chopper 4-1 on the slider 4. A reflective optical coupler 12 is also provided at the position corresponding to the test tube 1 on the fixed block 2, and the reflective optical coupler 12 is used to determine whether there is a test tube that needs to be rotated and scanned.

[0027] The working principle of the test tube rotating mechanism of the present invention is as follows:

[0028] 1. Power on, reset the active shaft 6, and determine whether the active shaft 6 has been reset through the slotted optical coupler 11;

[0029] 2. The reflective optical coupler 12 determines whether there is a test tube that needs to be rotated and scanned;

[0030] 3. If there is a test tube to be rotated in the test tube rack, the motor is started to reverse, driving the active shaft 6 through the one-way bearing 9 to drive the cam 8 to rotate synchronously in the opposite direction in the cam groove close to the cam retaining edge 2-1, and the cam 8 simultaneously pushes the active shaft 6 to move in the direction of the test tube 1. Driven by the active shaft 6, the slider 4 simultaneously moves in the direction of the test tube 1 and gradually increases the force of the compression spring 3-2 until the active shaft 6 drives the rotating gear 10 to clamp the test tube 1;

[0031] 4. Start the motor to rotate forward, drive the active shaft 6 to drive the rotating gear 10 to rotate forward, and the cam 8 does not rotate with the active shaft 6. The static friction between the cam 8 and the cam retaining edge 2-1 prevents the cam 8 from rotating at will, and the active shaft 6 does not move. The rotating gear 10 always clamps the test tube 1 and the rotating gear 10 engages with the test tube 1 to make the test tube 1 rotate synchronously with the active shaft 6.

[0032] In the test tube rotating mechanism of the present invention, judging whether the rotating gear 10 clamps the test tube 1 and whether the test tube 1 has rotated synchronously with the driving shaft 6 for one circle can be achieved by controlling the running time of the motor; if it is a stepping motor, it can also be achieved by controlling the number of steps of the stepping motor.

[0033] The test tube rotating mechanism of the present invention is applied to a test tube rotating code scanning device, and a code scanner is arranged on one side of the test tube 1. When the test tube rotating mechanism rotates the test tube 1 until the barcode on the test tube 1 faces the scanning window of the code scanner, the code scanner quickly scans the barcode on the test tube 1.

[0034] The above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. If the present invention is modified or replaced by equivalents without departing from the spirit and scope of the present invention, they should all be included in the protection scope of the claims of the present invention.

Claims

1. A test tube rotating mechanism, comprising a fixed block (2), on which a clamping rotating assembly and a cam groove are arranged, characterized in that: The clamping rotating assembly comprises a motor (5), a driving shaft (6), a cam (8), a one-way bearing (9), and a rotating gear (10). The motor (5) drives the driving shaft (6) to rotate, and the driving shaft (6) drives the rotating gear (10) to rotate. The driving shaft (6) is connected to the cam (8) through the one-way bearing (9) and drives the cam (8) to rotate. A cam retaining edge (2-1) is provided on the cam groove, and the circumferential surface of the cam (8) is always in contact with the cam retaining edge (2-1); the one-way bearing (9) is fixed on the cam (8) through a bearing pressure plate (13); and the fixed block (2) is also provided with a reflective optical coupler (12), and the reflective optical coupler (12) is used to determine whether there is a sample tube to be rotated.

2. The test tube rotating mechanism according to claim 1, characterized in that: A slider fixing seat (3) is also provided on the fixing block (2), at least one slide bar (3-1) is provided on the slide bar fixing seat (3), a spring (3-2) and a slider (4) are provided on the slide bar (3-1), the spring (3-2) is away from the cam retaining edge (2-1) relative to the slider (4), and the driving shaft (6) is connected to the slider (4) and drives the slider (4) to slide along the slide bar (3-1) and compress the spring (3-2).

3. The test tube rotating mechanism according to claim 2, characterized in that: The slider (4) is provided with an axial hole, a slider bearing (7) is connected in the axial hole, and the driving shaft (6) is connected to the slider (4) via the slider bearing (7).

4. The test tube rotating mechanism according to claim 2, characterized in that: The natural length of the spring (3-2) is greater than the length difference between the slide bar (3-1) and the slide block (4).

5. The test tube rotating mechanism according to claim 2, characterized in that: The slide block (4) is away from the sample tube relative to the spring (3-2).

6. The test tube rotating mechanism according to claim 2, characterized in that: A chopper (4-1) is provided on the slider (4), and a slot-shaped optical coupler (11) for sensing position information of the chopper (4-1) is provided on a side of the fixed block (2) corresponding to the chopper (4-1).

7. A test tube rotating code scanning device, characterized in that: It comprises a scanner and the test tube rotating mechanism as claimed in any one of claims 1 to 6, wherein the scanning window of the scanner is aligned with the side of the sample test tube and is used to scan the bar code attached to the sample test tube.

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