CN217230694U

CN217230694U - Elastic push rod and sample pressing mechanism

Info

Publication number: CN217230694U
Application number: CN202220417003.5U
Authority: CN
Inventors: 徐立伟; 相凯; 赵海娟
Original assignee: Anhui Wanyi Science and Technology Co Ltd
Current assignee: Anhui Wanyi Science and Technology Co Ltd
Priority date: 2022-02-28
Filing date: 2022-02-28
Publication date: 2022-08-19
Anticipated expiration: 2032-02-28

Abstract

The utility model discloses an elastic push rod and a sample pressing mechanism, wherein the elastic push rod comprises a first rod body and a second rod body, the first rod body is connected with the second rod body through an elastic unit, so that the first rod body and the second rod body can move relatively, and the first rod body and the second rod body are coaxially distributed; a linear guide unit is further arranged between the first rod body and the second rod body, so that the first rod body and the second rod body move linearly relative to each other. The utility model discloses a sample pushes down mechanism is owing to used the elasticity push rod, consequently, and it can effectually prevent that the motor from stalling and pushing down the risk that the unit crushes the sample by pressure.

Description

Elastic push rod and sample pressing mechanism

Technical Field

The utility model relates to a sample of digital PCR system pushes down the technique, in particular to elasticity push rod and sample push down mechanism.

Background

In sample fixing in a digital PCR system, a sample is generally pressed down by a pressing mechanism. In the prior art, the pressing mechanism is usually driven by a stepping motor, and in the pressing mechanism, a photoelectric switch is usually installed to control the stepping motor, that is, when the pressing mechanism is pressed down to a specified position, the photoelectric switch is just triggered to make the digital PCR system control the stepping motor to stop rotating. However, the photoelectric switch is a vulnerable part, and once the photoelectric switch cannot normally work, the stepping motor cannot normally stop rotating, so that the phenomenon of rotation blockage is caused, and the sample can be damaged along with the occurrence of rotation blockage.

SUMMERY OF THE UTILITY MODEL

In order to solve the deficiencies in the prior art, the utility model aims to provide an elasticity push rod and sample push down mechanism, this sample push down mechanism is based on this elasticity push rod, can effectually prevent that the motor from stalling and pushing down the risk that the unit crushd the sample by pressure.

The utility model provides a technical scheme that its technical problem adopted does: an elastic push rod comprises a first rod body and a second rod body, wherein the first rod body and the second rod body are connected through an elastic unit, so that the first rod body and the second rod body can move relatively, and the first rod body and the second rod body are coaxially distributed;

a linear guide unit is further arranged between the first rod body and the second rod body, so that the first rod body and the second rod body can move linearly relative to each other.

Optionally, one end of the first rod body is provided with a cavity arranged along the axial direction, and the inner diameter of the cavity is matched with one end of the second rod body close to the first rod body, so that the second rod body is inserted into the cavity and can move along the cavity;

the elastic unit is arranged between the end part of the second rod body and the cavity bottom of the cavity.

Optionally, the elastic unit is a spring.

Optionally, the end of the second rod body located in the cavity has a guide rod extending axially outwards, the diameter of the guide rod is smaller than that of the second rod body, and the guide rod and the second rod body are distributed coaxially;

one end of the spring, which is close to the second rod body, is sleeved outside the guide rod.

Optionally, the linear guide unit includes a through hole formed in a wall of the cavity, and a limit rod disposed on the second rod body, the limit rod is adapted to the through hole, and the length of the through hole is adapted to the deformation of the spring.

Adopt above-mentioned technical scheme, the utility model discloses an elasticity push rod, it can conduct the effect of power to have the flexible volume of elasticity in rectilinear direction, make the conduction of thrust can have linear continuous variation, prevent that the conduction of power from producing the change in the twinkling of an eye.

The utility model discloses based on foretell elasticity push rod, still provide a sample and pushed down mechanism, it includes the base and locates pushing down unit and step motor lead screw assembly in the base, wherein, push down the unit with connect through foretell elasticity push rod between the step motor lead screw assembly.

Optionally, the elastic push rod is connected with the stepping motor lead screw assembly through a lead screw nut, so that the elastic push rod moves along the axial direction of the elastic push rod under the driving of the stepping motor lead screw assembly;

the pressing unit is hinged with one end, far away from the lead screw component of the stepping motor, of the elastic push rod.

Optionally, a linear bearing for connecting the elastic push rod is mounted on the base.

Optionally, a first optocoupler and a second optocoupler are arranged on the base, and the first optocoupler is arranged on the opposite surface of the second optocoupler, so that light emitted by the first optocoupler is received by the second optocoupler;

the base is equipped with mobilizable opto-coupler separation blade between first opto-coupler and second opto-coupler, the opto-coupler separation blade with screw nut is connected.

Optionally, a guide rail used for connecting the optical coupling separation blade is arranged in the base, so that the optical coupling separation blade moves along the guide rail.

Adopt above-mentioned technical scheme, the utility model discloses a sample pushes down mechanism, it has adopted the elasticity push rod, consequently, pushes down the unit after removing the assigned position, if step motor lead screw assembly fails the stall, the elasticity push rod then can provide flexible volume to can effectually prevent that the motor from stalling and pushing down the risk that the unit crushd the sample by pressure.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic structural view of the elastic push rod of the present invention;

fig. 3 is a sectional view of the elastic push rod of the present invention.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 1, the utility model discloses a sample pushes down mechanism, this sample pushes down mechanism include base 1, locate pushing down unit 2 and step motor lead screw assembly 3 in the base 1, push down between unit 2 and the step motor lead screw assembly 3 and be connected through elasticity push rod 4. The utility model discloses in, push down unit 2 is used for compressing tightly the sample, and it specifically includes down the pressure head and guide down the smooth axle that the pressure head moved on the upper and lower direction, and the pressure head is then articulated with elasticity push rod 4 through the connecting rod down, and when elasticity push rod 4 removed along the horizontal direction, the pressure head produced the removal along the upper and lower direction under the effect of elasticity push rod 4 and connecting rod down. The utility model discloses a step motor lead screw subassembly 3 specifically includes step motor and through step motor driven lead screw, and it is used for driving elasticity push rod 4 and produces the removal along the horizontal direction (the axial of elasticity push rod promptly), and then the drive pushes down unit 2 and compresses tightly the sample.

Particularly, the utility model discloses an elasticity push rod 4 is connected with step motor lead screw assembly 3 through lead screw nut 5 to make elasticity push rod 4 pass through step motor lead screw assembly 3's drive, along the axial displacement of elasticity push rod 4. When the screw nut 5 is fixedly connected with the elastic push rod 4, the screw nut 5 does not rotate in the screw immediately, and therefore, along with the rotation of the screw, the screw nut 5 drives the elastic push rod 4 to move.

In order to facilitate the linearity of the elastic push rod 4 during movement, a linear bearing 6 for connecting the elastic push rod 4 is further installed on the base 1, so that when the elastic push rod 4 moves, linear movement can be generated along the linear bearing 6.

The utility model discloses in, for the convenience of being in place after pushing down unit 2 removal, step motor lead screw assembly 3 can be quick make stop response, can be equipped with first opto-coupler 7 and second opto-coupler 8 on base 1, first opto-coupler 7 pairs mutually with second opto-coupler 8, and the opposite face of second opto-coupler 8 is located to first opto-coupler 7 for the light of 7 launches of first opto-coupler is received by second opto-coupler 8, first opto-coupler 7 is connected with the control unit of digital PCR system again respectively with second opto-coupler 8. Through the setting of first opto-coupler 7 and second opto-coupler 8, when pressing unit 2 and removing the back that targets in place, the light of 7 launches of first opto-coupler is blocked, can't be received by second opto-coupler 8, and second opto-coupler 8 is with this signal transmission to the control unit, and control unit controls step motor lead screw component 3 stall again. Based on this, the utility model discloses a base is equipped with mobilizable opto-coupler separation blade 9 between first opto-coupler 7 and second opto-coupler 8 to opto-coupler separation blade 9 is connected with screw nut 5, makes opto-coupler separation blade 9 remove along with screw nut 5 like this. The set optical coupling baffle plate 9 needs to meet the following conditions: when the optical coupler separation blade 9 is at initial position, the transmission light of first optical coupler 7 can be received by second optical coupler 8, and when pushing down unit 2 and removing the back that targets in place, the transmission light of first optical coupler 7 is blocked just to optical coupler separation blade 9. However, in the system operation process, if in case first opto-coupler 7 or second opto-coupler 8 can not normally be worked, the control unit just can't receive the stall signal, and step motor will continuously move, until moving to the biggest step number, because the utility model discloses an elasticity push rod, consequently, at step motor continuously move's in-process, elasticity push rod 4 can contract to can alleviate the decurrent pressure of unit 2 that pushes down.

The utility model discloses in, can install the guide rail 10 that is used for connecting opto-coupler separation blade 9 in base 1 for opto-coupler separation blade 9 can be followed guide rail 10 and be linear movement, can prevent simultaneously that opto-coupler separation blade 9 is skew, so that the transmission light is blocked that opto-coupler separation blade 9 can be accurate.

In the present invention, as shown in fig. 2 and 3, the elastic pushing rod 4 specifically includes a first rod 11 and a second rod 12 coaxially disposed, and the first rod 11 and the second rod 12 are connected through an elastic unit, so that the first rod 11 and the second rod 12 can move relatively. The elastic unit may use a spring 13.

The utility model discloses in, as shown in fig. 3, be equipped with the cavity 14 that sets up along the axial in the one end of the first body of rod 11, the internal diameter of cavity 14 is close to the one end adaptation of the first body of rod 11 with the second body of rod 12 for the second body of rod 12 can insert in the cavity 14, and can follow cavity 14 and remove, and spring 13 then locates between the tip of the second body of rod 12 and the chamber end of cavity 14. In addition, the end of the second rod 12 located in the cavity 14 has a guiding rod 15 extending outward in the axial direction, the diameter of the guiding rod 15 is smaller than the diameter of the second rod 12, the guiding rod 15 and the second rod 12 are distributed coaxially, and one end of the spring 13 close to the second rod 12 is sleeved outside the guiding rod 15.

The present invention provides a linear guide unit between the first rod 11 and the second rod 12, so that the relative movement between the first rod 11 and the second rod 12 is linear movement. Specifically, as shown in fig. 2, the linear guide unit includes through holes 16 disposed on two side walls of the cavity 14, and a stop rod 17 disposed on the second rod 12, wherein the stop rod 17 is adapted to the through holes 16, the length of the through holes 16 is adapted to the deformation of the springs 13, and the stop rod 17 penetrates through the through holes 16. The utility model discloses a gag lever post 17 can adopt bolt construction to convenient to detach.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be understood by those skilled in the art that the scope of the present invention is not limited to the specific combination of the above-mentioned features, but also covers other embodiments formed by any combination of the above-mentioned features or their equivalents without departing from the spirit of the present invention. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Besides the technical features described in the specification, other technical features are known to those skilled in the art, and further description of the other technical features is omitted here in order to highlight the innovative features of the present invention.

Claims

1. An elastic push rod is characterized by comprising a first rod body and a second rod body, wherein the first rod body and the second rod body are connected through an elastic unit, so that the first rod body and the second rod body can move relatively, and the first rod body and the second rod body are coaxially distributed;

2. The elastic push rod according to claim 1, wherein one end of the first rod body is provided with a cavity arranged along the axial direction, and the inner diameter of the cavity is matched with one end of the second rod body close to the first rod body, so that the second rod body is inserted into the cavity and can move along the cavity;

3. The resilient putter of claim 2 wherein said resilient unit is a spring.

4. The resilient pushrod of claim 3, wherein the end of the second rod body located in the cavity has a guide rod extending axially outward, the diameter of the guide rod is smaller than the diameter of the second rod body, and the guide rod is coaxial with the second rod body;

one end of the spring close to the second rod body is sleeved outside the guide rod.

5. The elastic pushing rod according to claim 4, wherein the linear guide unit comprises a through hole formed in a wall of the cavity and a stop rod disposed on the second rod, the stop rod is adapted to the through hole, and the length of the through hole is adapted to the deformation of the spring.

6. A sample pushing mechanism is characterized by comprising a base, a pushing unit and a stepping motor lead screw assembly, wherein the pushing unit and the stepping motor lead screw assembly are arranged in the base, and the pushing unit and the stepping motor lead screw assembly are connected through an elastic push rod according to any one of claims 1 to 5.

7. The sample hold-down mechanism according to claim 6, wherein the elastic push rod is connected with the stepping motor screw assembly through a screw nut, so that the elastic push rod moves along the axial direction of the elastic push rod by being driven by the stepping motor screw assembly;

the pressing unit is hinged with one end, far away from the screw rod assembly of the stepping motor, of the elastic push rod.

8. The sample hold-down mechanism of claim 7, wherein the base mounts a linear bearing for attachment of the resilient push rod.

9. The sample pressing mechanism according to claim 8, wherein a first optical coupler and a second optical coupler are arranged on the base, and the first optical coupler is arranged on the opposite surface of the second optical coupler, so that light emitted by the first optical coupler is received by the second optical coupler;

10. The sample hold-down mechanism according to claim 9, wherein a guide rail for connecting the light-coupling blocking piece is provided in the base, so that the light-coupling blocking piece moves along the guide rail.