Sample adding module driven by gear and rack

Abstract

The utility model relates to the technical field of medical instruments, and discloses a sample adding module driven by a gear and a rack, which comprises a fixing frame, a limiting frame, a transmission module and a sample adding needle, the transmission module comprises a driving motor, a gear connected with the output end of the driving motor and a rack in meshing transmission with the gear, the sample adding needle is fixedly connected with the driving motor through the limiting frame, the rack is fixedly connected to the inner wall of the fixing frame, a movable sliding groove is formed in the outer side of the fixing frame in the vertical direction, and the movable sliding groove is fixedly connected with the limiting frame. And the transmission module drives the sample adding needle to extend out of the movable sliding chute to move up and down.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a sample adding module driven by a gear rack. Background Art

[0002] The sample adding device is one of the main components of the existing chemical analyzer. It is used to drive the sample adding needle to complete the reagent adding process. It has the function of lifting and lowering relative to the plane and optional installation. The sample adding needle is mainly responsible for penetrating the vessel to perform the sample adding action. The sample adding device generally realizes the sample adding of reagents by moving up and down. The existing technology mainly uses belt transmission. For example, the patent document with patent number CN203858256U discloses a sample adding system. For biochemical analyzers with small size and simple functions, lifting and lowering are realized by belt transmission. This kind of lifting structure is complex.

[0003] The existing gear rack transmission on the market generally has one end of the gear and the motor as the fixed end, and the rack as the movable end. This design is not very suitable for limited space and large stroke conditions. Because the rack is the movable end, its movement space must be more than twice the length of the rack. This type of transmission module occupies a large space when driving the sample injection needle to inject samples. When assembling a small-volume biochemical analyzer, its space utilization rate is not high. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a sample adding module which is compact in structure and saves space and is driven by a gear rack.

[0005] The technical solution of the utility model is: a sample loading module driven by a gear rack, comprising a fixed frame, a limiting frame, a transmission module and a sample loading needle, the limiting frame is arranged in the fixed frame, the transmission module comprises a driving motor, a gear connected to the output end of the driving motor and a rack meshing with the gear for transmission, the sample loading needle is fixedly connected to the driving motor through the limiting frame, the rack is fixedly connected to the inner wall of the fixed frame, a movable slide groove is vertically arranged on the outer side of the fixed frame, and the transmission module drives the sample loading needle to extend out of the movable slide groove to move up and down.

[0006] It can be seen from the above scheme that the rack is fixedly connected to the fixed frame, the driving motor drives the gear to rotate, and the limit frame is used to connect the driving motor, the gear and the sample addition needle, so as to realize up and down movement together in the fixed frame. The gear realizes the up and down movement of the sample addition needle by meshing with the rack, and the movable slide groove is used to realize the guidance of the sample addition needle when it moves up and down. The rack of the utility model is the fixed end, and the driving motor and the gear are the movable ends. The movable space is the length of the rack and the size of the driving motor, which saves space while ensuring the stroke.

[0007] The bottom end of the sample adding needle is shrunk inwards, the lower diameter of the sample adding needle is smaller than the upper diameter of the sample adding needle, and the upper end of the sample adding needle is connected with a delivery hose. It can be seen that the sample adding needle is connected with the delivery hose and the syringe.

[0008] The limiting frame includes a frame body and a limiting plate arranged on the frame body, and a gap is arranged between the frame body and the limiting plate, and the gap is adapted to the delivery hose. It can be seen that the set gap between the frame body and the limiting plate is used for the delivery hose to pass through, and during the up and down movement of the sample adding needle, it is convenient for the delivery hose to move after passing through.

[0009] The transmission module further comprises a guide rail and a slider, the slider is slidably connected to the guide rail, the guide rail and the rack are vertically and fixedly connected to the inner wall of the fixing frame, and the limit frame is fixedly connected to the slider. It can be seen that the slider and the limit frame move up and down together, and the guidance is achieved by sliding with the guide rail.

[0010] The front side of the frame is provided with a receiving groove, the rear side of the frame is provided with a mounting cavity corresponding to the receiving groove, the side of the frame is provided with a through cavity, the frame is provided with a mounting groove connected with the through cavity, the mounting groove runs through the receiving groove and the mounting cavity, and the mounting groove is adapted to the gear. It can be seen that the through cavity is used to horizontally install the drive motor, the mounting groove is used to limit the gear, and the receiving groove is used to accommodate the delivery hose, so that the delivery hose and the sample injection needle can be extended when moving up and down.

[0011] The limiting frame extends out of the movable slide slot and is integrally formed with a sample needle limiting block, the sample needle limiting block is provided with a pinhole adapted to the sample needle through the upper and lower parts, and the sample needle extends downwardly out of the pinhole. It can be seen that the sample needle limiting block is used to limit the sample needle through the pinhole.

[0012] The sample needle stop block is provided with an escape portion at the upper end of the needle hole. It can be seen that the sample needle stop block forms an escape space when the delivery hose is connected to the sample needle through the escape portion, and facilitates the connection between the end of the delivery hose and the sample needle, and is easy to disassemble and replace. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 It is a partial structural schematic diagram of the utility model;

[0015] Figure 3 It is a partial structural schematic diagram of the utility model;

[0016] Figure 4 It is a structural diagram of the limit frame. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0018] like Figures 1 to 4 As shown, the utility model is a sample loading module driven by a gear rack, comprising a fixed frame 1, a limiting frame 2, a transmission module and a sample loading needle 3, the limiting frame 2 is arranged in the fixed frame 1, the transmission module comprises a driving motor 4, a gear 5 connected to the output end of the driving motor 4, a rack 6 meshing with the gear 5 for transmission, a guide rail 7 and a slider 8, the slider 8 is slidably connected to the guide rail 7, the guide rail 7 and the rack 6 are vertically parallel and fixedly connected to the inner wall of the fixed frame 1, the limiting frame 2 is fixedly connected to the slider 2, the sample loading needle 3 is fixedly connected to the driving motor 4 through the limiting frame 2, and a movable slide groove 10 is vertically arranged on the outer side of the fixed frame 1, and the transmission module drives the sample loading needle 3 to extend out of the movable slide groove 10 to move up and down, so as to facilitate the insertion or extension of the reagent tube to realize reagent loading.

[0019] In this embodiment, the fixing frame 1 includes an integrally formed front plate, a rear plate and a side plate, the sample needle 3 is arranged in parallel with the rack 6, the rack 6 on the transmission module is fixed on the rear plate as a fixed end, the drive motor 4 and the gear 5 are the movable ends, which drive the sample needle 3 on the limit plate 2 to move up and down, and its movable space is the length of the rack 6 and the size of the drive motor 4. The structure of the utility model is compact, and the transmission module saves space while ensuring the stroke, which is convenient for the assembly and use of the module on a small-volume biochemical analyzer.

[0020] The limiting frame 2 includes a frame body 21 and a limiting plate 22 arranged on the frame body 21, a gap is provided between the frame body 21 and the limiting plate 22, the bottom end of the sample adding needle 3 is shrunk inwardly, the lower diameter of the sample adding needle 3 is smaller than the upper diameter of the sample adding needle 3, the upper end of the sample adding needle 3 is connected with a delivery hose 9, the gap is adapted to the delivery hose 9, the front side of the frame body 21 is provided with a receiving groove 211, the rear side of the frame body 21 is provided with an installation cavity 212 corresponding to the receiving groove 211, and the side of the frame body 21 is provided with a through cavity 21 3. The frame body 21 is provided with a mounting groove 214 connected with the through cavity 213, the mounting groove 214 passes through the accommodating groove 211 and the mounting concave cavity 212, the mounting groove 214 is adapted to the gear 5, the limiting frame 2 extends out of the movable slide groove 10 and is integrally formed with a sample needle limiting block 23, the sample needle limiting block 23 is penetrated by a needle hole 231 adapted to the sample needle 3 from top to bottom, the sample needle 3 extends downwardly from the needle hole 231, and the sample needle 3 limiting block is provided with a avoidance portion 232 at the upper end of the needle hole 231. In this embodiment, one end of the delivery hose 9 is connected to the sample injection needle 3, and the other end is connected to the relevant injection device for easy extraction and injection. The avoidance portion 232 is an arc portion that is recessed inward. The gap between the frame 21 and the limiting plate 22 facilitates the insertion of the delivery hose 9 and reduces the friction generated by the delivery hose 9 during movement. The receiving groove 211 is used to store the delivery hose 9.

[0021] The working process of the utility model is as follows: the fixed frame 1 is fixedly installed on the biochemical analyzer, the driving motor 4 drives the gear 5 to rotate, the gear 5 is meshed with the rack 6 for transmission, the driving motor 4 and the gear 5 drive the limiting frame 2 and the limiting frame 2 to move up and down in the fixed frame 1, the slider 8 slides on the guide rail 7 to facilitate the guidance of the limiting frame 2 when it moves up and down, and the sample addition needle 3 extends out of the fixed frame and moves up and down in the moving slide groove 10.

[0022] Finally, it should be emphasized that the above is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A sample loading module driven by a gear rack, comprising a fixing frame (1), a limiting frame (2), a transmission module and a sample loading needle (3), characterized in that: The limiting frame (2) is arranged in the fixed frame (1); the transmission module comprises a driving motor (4), a gear (5) connected to the output end of the driving motor (4) and a rack (6) meshing with the gear (5) for transmission; the sample adding needle (3) is fixedly connected to the driving motor (4) through the limiting frame (2); the rack (6) is fixedly connected to the inner wall of the fixed frame (1); a movable slide groove (10) is arranged on the outer side of the fixed frame (1) in a vertical direction; and the transmission module drives the sample adding needle (3) to extend out of the movable slide groove (10) to move up and down.

2. The sample loading module driven by a gear rack according to claim 1, characterized in that: The bottom end of the sample adding needle (3) is shrunk inwards, the diameter of the bottom of the sample adding needle (3) is smaller than the diameter of the top of the sample adding needle (3), and the top of the sample adding needle (3) is connected to a delivery hose (9).

3. The sample loading module driven by a gear rack according to claim 2, characterized in that: The limiting frame (2) comprises a frame body (21) and a limiting plate (22) arranged on the frame body (21), a gap is provided between the frame body (21) and the limiting plate (22), and the gap is adapted to the delivery hose (9).

4. The sample loading module driven by a gear rack according to claim 1, characterized in that: The transmission module further comprises a guide rail (7) and a slider (8), wherein the slider (8) is slidably connected to the guide rail (7), and the guide rail (7) and the rack (6) are vertically and parallelly fixedly connected to the inner wall of the fixed frame (1).

5. The sample loading module driven by a gear rack according to claim 3, characterized in that: The front side of the frame body (21) is provided with a receiving groove (211), the rear side of the frame body (21) is provided with a mounting cavity (212) corresponding to the receiving groove (211), the side of the frame body (21) is provided with a through cavity (213), the frame body (21) is provided with a mounting groove (214) connected with the through cavity (213), the mounting groove (214) passes through the receiving groove (211) and the mounting cavity (212), and the mounting groove (214) is adapted to the gear (5).

6. The sample loading module driven by a gear rack according to claim 1, characterized in that: The limiting frame (2) extends out of the movable slide groove (10) and is integrally formed with a sample needle limiting block (23); the sample needle limiting block (23) is provided with a needle hole (231) adapted to the sample needle (3) penetrating from top to bottom; the sample needle (3) extends downwardly out of the needle hole (231).

7. The sample loading module driven by a gear rack according to claim 6, characterized in that: The limiting block of the sample adding needle (3) is provided with an avoidance portion (232) at the upper end of the needle hole (231).

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