SAMPLE INJECTION PROPULSION MECHANISM FOR BIOCHEMICAL ANALYZER

Abstract

A sample feeding propulsion mechanism for biochemical analyzer, comprising a push plate (1), a horizontal guide rail (2), a motor (3), and it further comprises a propulsive guide plate (4), a thrust roller (5) and a rotating wheel (6), the propulsive guide plate (4) is in sliding fit on the horizontal guide rail (2), the push plate (1) is joined to the propulsive guide plate (4); the rotating wheel 6 is mounted on an output shaft of the motor; the thrust roller is eccentrically mounted on one side of the rotating wheel, the propulsive guide plate is provided with a guide groove forming an included angle with the horizontal guide rail in their length directions; and the thrust roller is in rolling fit in the guide groove. The sample feeding propulsion mechanism for biochemical analyzer in this disclosure is simple in structure, small in size and occupied mounting space.

Claims

1. A sample feeding propulsion mechanism for biochemical analyzer, comprising: a push plate (1), a horizontal guide rail (2), a motor (3), wherein it further comprises a propulsive guide plate (4), a thrust roller (5) and a rotating wheel (6); the propulsive guide plate (4) is in sliding fit on the horizontal guide rail (2), the push plate (1) is joined to the propulsive guide plate (4); the rotating wheel 6 is mounted on an output shaft of the motor (3); the thrust roller (5) is eccentrically mounted on one side of the rotating wheel (6), the propulsive guide plate (4) is provided with a guide groove (4.1) forming an included angle with the horizontal guide rail (2) in their length directions; and the thrust roller (5) is in rolling fit in the guide groove (4.1).

2. The sample feeding propulsion mechanism for biochemical analyzer of claim 1, wherein an include angle of 90 is formed between the guide groove (4.1) and the horizontal guide rails (2) in their length directions

3. The sample feeding propulsion mechanism for biochemical analyzer of claim 1, wherein the sample feeding propulsion mechanism further comprises a base plate (7); the horizontal guide rail (2) is mounted on the upper side of the base plate (7); the motor (3) is mounted on the lower side of the base plate (7). The rotating wheel (6) is arranged above the base plate (7), and the output shaft of the motor (3) penetrates through the base plate (7) to be joined to the rotating wheel (6).

4. The sample feeding propulsion mechanism for biochemical analyzer of claim 1, wherein the sample feeding propulsion mechanism also comprises a lifting structure that includes a lifting guide plate (9) at one side of the push plate (1), one side proximal the push plate (1) of the lifting guide plate (9) is provided with an annular lifting guide groove (10); one side of the push plate (1) is provided with a guide roller (11) in rolling fit in the lifting guide groove (10); the push plate (1) is joined to the propulsive guide plate (4) in a vertically movable manner.

5. The sample feeding propulsion mechanism for biochemical analyzer of claim 4, wherein one end at the upper side of the lifting guide groove (10) is provided with an upper elastic sheet (12) pressing the guide roller (11) downward; the other end at the lower side of the lifting guide groove (10) is provided with a lower elastic sheet (13) pushing the guide roller (11) upward.

6. The sample feeding propulsion mechanism for biochemical analyzer of claim 5, wherein the propulsive guide plate (4) is provided with vertical guide rails (14) and the push plate (1) is in sliding fit on the vertical guide rails (14).

7. The sample feeding propulsion mechanism for biochemical analyzer of claim 6, wherein the vertical guide rails (14) are secured on the propulsive guide plate (4) through a mounting plate 15); the push plate (1) is connected with a fixing plate (16) on which a first slider (17) is fixed; the first slider (17) is in sliding fit on the vertical guide rails (14); a tension spring (18) is arranged between the mounting plate (15) and the fixing plate (16); the upper and lower ends of the tension spring (18) are respectively connected with the mounting plate (15) and the fixing plate (16).

8. The sample feeding propulsion mechanism for biochemical analyzer of claim 7, wherein one side of the fixing plate (16) is also provided with a support (19); the guide roller (11) is connected on the support (19) and the lower end of the tension spring (18) is connected to the support (19).

9. The sample feeding propulsion mechanism for biochemical analyzer of claim 4, wherein one end at the upper side of the base plate (7) is provided with a transmission-type optical interrupter (20), and on the transmission-type optical interrupter (20) is provided with an interrupt slot (20.1), the push plate (1) has a baffle (21), and the baffle (21) is used for penetrating through the interrupt slot (20.1) to block light rays in the interrupt slot (20.1).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG. 1 is a schematic diagram of a stereo structure of a sample feeding propulsion mechanism for biochemical analyzer of the present disclosure.

[0016] FIG. 2 is a partially schematic structural diagram of the sample feeding propulsion mechanism for biochemical analyzer of the present disclosure.

[0017] FIG. 3 is a partially schematic structural diagram of the sample feeding propulsion mechanism for biochemical analyzer of the present disclosure

[0018] FIG. 4 is a schematic structural diagram of a rotating wheel of the sample feeding propulsion mechanism for biochemical analyzer of the present disclosure.

[0019] FIG. 5 is a schematic structural diagram of a propulsive guide plate of the sample feeding propulsion mechanism for biochemical analyzer of the present disclosure.

[0020] FIG. 6 is a schematic structural diagram of a mounting plate of the sample feeding propulsion mechanism for biochemical analyzer of the present disclosure.

[0021] FIG. 7 is a schematic structural diagram of a lifting guide plate of the sample feeding propulsion mechanism for biochemical analyzer of the present disclosure.

[0022] The reference numerals denote: 1 push plate; 2 horizontal guide rail; 3 motor; 4 propulsive guide plate; 4.1 guide groove; 5 thrust roller; 6 rotating wheel; 7 base plate; 8 second slider; 9 lifting guide plate; 10 lifting guide groove; 11 guide roller; 12 upper elastic sheet; 13 lower elastic sheet; 14 vertical guide rail; 15 mounting plate; 16 fixing plate; 17 first slider; 18 tension spring; 19 support; 20 transmission-type optical interrupter; 21 baffle.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The disclosure will be further explained below in detail in combination with the drawings and embodiments.

[0024] Referring to FIGS. 1-7, the sample feeding propulsion mechanism for biochemical analyzer comprises a push plate 1, horizontal guide rails 2, a motor 3, a propulsive guide plate 4, a thrust roller 5 and a rotating wheel 6, the propulsive guide plate 4 is in sliding fit on the horizontal guide rails 2, the push plate 1 is joined to the propulsive guide plate 4; the rotating wheel 6 is mounted on an output shaft of the motor 3; the thrust roller 5 is eccentrically mounted on one side of the rotating wheel 6, the propulsive guide plate 4 is provided with a guide groove 4.1 forming an included angle with the horizontal guide rails 2 in their length directions; and the thrust roller 5 is in rolling fit in the guide groove 4.1. In this embodiment, an include angle of 90 is formed between the guide groove 4.1 and the horizontal guide rails 2 in their length directions.

[0025] The sample feeding propulsion mechanism further comprises a base plate 7. Two horizontal guide rails 2 are mounted on the upper, side of the base plate 7 parallel to each other. Two sides of the propulsive guide plate 4 are respectively provided with a second slider 8. The sliders 8 are in sliding fit on the horizontal guide rails 2 in a one-to-one correspondence manner. The motor 3 is mounted on the lower side of the base plate 7. The rotating wheel 6 is arranged above the base plate 7; and the output shaft of the motor 3 penetrates through the base plate 7 to be joined to the rotating wheel 6.

[0026] The sample feeding propulsion mechanism also comprises a lifting structure that includes a lifting guide plate 9 at one side of the push plate 1. The lower side of the lifting guide plate 9 is secured on the base plate 7. One side proximal the push plate 1 of the lifting guide plate 9 is provided with an annular lifting guide groove 10. One side of the push plate 1 is provided with a guide roller 11 in rolling fit in the lifting guide groove 10. The push plate 1 is joined to the propulsive guide plate 4 in a vertically movable manner.

[0027] One end at the upper side of the lifting guide groove 10 is provided with an upper elastic sheet 12 pressing the guide roller 11 downward, i.e., the upper elastic sheet 12 is contained in the lifting guide groove 10, but with its lower end suspended in the air. Space is reserved between the upper elastic sheet 12 and the side wall of one end of the lifting guide groove 10. The other end at the lower side of the lifting guide groove 10 is provided with a lower elastic sheet 13 pushing the guide roller 11 upward, i.e., the lower elastic sheet 13 is contained in the lifting guide groove 10, but with its upper end suspended in the air. Space is also reserved between the lower elastic sheet 13 and the side wall of the other end of the lifting guide groove 10.

[0028] The propulsive guide plate 4 is provided with vertical guide rails 14 where the push plate 1 is in sliding fit. The vertical guide rails 14 are secured on the propulsive guide plate 4 through a mounting plate 15. The push plate 1 is connected with a fixing plate 16 on which first sliders 17 are fixed. The first sliders 17 are in sliding fit on the vertical guide rails 14. A tension spring 18 is arranged between the mounting plate 15 and the fixing plate 16. The upper and lower ends of the tension spring 18 are respectively connected with the mounting plate 15 and the fixing plate 16. One side of the fixing plate 16 is also provided with a support 19 on which the guide roller 11 is connected. The lower end of the tension spring 18 is connected to the support 19.

[0029] One end at the upper side of the base plate 7 is provided with a transmission-type optical interrupter 20 with an interrupt slot 20.1 thereon. The push plate 1 has a baffle 21 for penetrating through the interrupt slot 20.1 to block light rays therein. In this embodiment, when the push plate 1 resets and just descends to the lowest position, the baffle 21 is contained in the interrupt slot 20.1 of the transmission-type optical interrupter 20.

[0030] The sample feeding propulsion mechanism for biochemical analyzer operates as the working principle below: a stepping motor drives the thrust roller to do eccentric rotation motion, and Y-direction linear motion in the guide groove of the propulsive guide plate. The propulsive guide plate is propelled to slide on the horizontal guide rails to complete X-direction linear motion, thereby further promoting the push plate to do X-direction linear motion.

[0031] Driven by the push plate, the guide roller does X-direction linear motion in the lifting guide groove and completes sample pushing until moving to the upper elastic sheet, at this time, the upper elastic sheet produces a downward pressure to the guide roller so as to force the push plate connected with the first sliders to move downward along the vertical guide rails. At this moment, the propulsive guide plate properly reaches its maximum stroke in the X direction and the push plate begins to return. In the returning process, under the joint effect of the lower elastic sheet and the tension spring, the push plate is forced to move upward along the vertical guide rails so as to prepare for pushing of next sample.