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CN-120381884-B - Microfluidic chip detection device

CN120381884BCN 120381884 BCN120381884 BCN 120381884BCN-120381884-B

Abstract

The application discloses a microfluidic chip detection device, which relates to the technical field of microfluidic chips and comprises a microfluidic chip body, a puncture assembly and a limiting assembly, wherein a bag cavity for placing a diluent bag is arranged on the microfluidic chip body, a push handle is connected in the bag cavity in a sliding manner, and the puncture assembly and the limiting assembly are respectively arranged in the push handle. According to the application, the push handle is positioned in the microfluidic chip body through the elastic sheet, so that the push handle is prevented from sliding at will to squeeze and crush the diluent bag in the transportation and transfer process, the outer end of the push rod is well extended into the pressing groove of the push handle, the bending rod is bent by 90 degrees, the push rod is prevented from being pressed, meanwhile, the puncture sheet is retracted into the push handle under the action of the elastic force of the spring, the puncture sheet is prevented from being contacted with the diluent bag to puncture the diluent bag in advance, the elastic sheet is positioned into the elastic limiting block through the extrusion piece, the push handle can slide in the bag cavity, and meanwhile, the puncture sheet extending out of the push handle is limited, so that the subsequent puncture sheet is convenient to puncture the diluent bag.

Inventors

  • XU GANGWEI
  • ZHAO ZHEHAO
  • XIE ZHONGWEN

Assignees

  • 小海龟科技(滁州)有限公司

Dates

Publication Date
20260505
Application Date
20250513

Claims (4)

  1. 1. The microfluidic chip detection device comprises a microfluidic chip body (1), wherein a bag cavity (11) for placing a diluent bag is arranged on the microfluidic chip body (1), and a pushing handle (2) is connected in the bag cavity (11) in a sliding manner, and the microfluidic chip detection device is characterized by further comprising a puncture assembly (3) and a limiting assembly (4); the puncture assembly (3) is arranged in the push handle (2) and punctures the diluent bag when the puncture piece (31) extends out of the push handle (2); The puncture assembly (3) further comprises a guide rod (32), a support plate (34), a spring (36) and a push rod (37), wherein the guide rod (32) is arranged between the inner wall of the push rod (2) and a fixed block (33) in the push rod (2), the support plate (34) is connected to the guide rod (32) in a sliding manner through a sliding block (35) at the lower side of the support plate, the puncture sheet (31) is arranged on the side surface of the support plate (34) and extends out of a slot hole at the inner end of the push rod (2), the spring (36) is sleeved on the guide rod (32) and is arranged between the inner wall of the push rod (2) and the sliding block (35), the puncture sheet (31) is retracted into the push rod (2) under the elastic action of the spring (36), the push rod (37) is connected to the push rod (2) in a sliding manner, the inner end of the push rod is connected with the support plate (34), and the outer end of the push rod (37) extends out of the push rod (37) to the pressing slot of the push rod (2) well; The limiting assembly (4) is arranged in the pushing handle (2) and comprises an elastic sheet (41), an extrusion piece (42) and a limiting block (43), wherein the elastic sheet (41) is arranged in the pushing handle (2), two ends of the elastic sheet extend out of side holes on two sides of the pushing handle (2) respectively, are inserted into positioning grooves on the inner wall of the capsule cavity (11) and are used for positioning the pushing handle (2) which does not move, the extrusion piece (42) is arranged on the side face of the support plate (34), the limiting block (43) is arranged on the inner wall of the pushing handle (2) and is opposite to the extrusion piece (42), and the elastic sheet (41) is positioned between the extrusion piece (42) and the limiting block (43); the extrusion piece (42) comprises a vertical plate (421) and a convex body (422), the convex body (422) is connected with the support plate (34) through the vertical plate (421), and the convex body (422) is of a cylindrical structure; The limiting block (43) is made of elastic materials, a strip-shaped groove (431) is formed in the end portion of the limiting block (43), the strip-shaped groove (431) is communicated with a limiting groove (432) on the limiting block (43), and the limiting groove (432) is of a cylindrical structure; When the microfluidic chip body (1) works, in the process that the support plate (34) moves, the puncturing piece (31) gradually extends out of the pushing handle (2), the extrusion piece (42) on the support plate (34) presses the elastic piece (41) to enable the elastic piece (41) to be separated from the positioning groove on the inner wall of the microfluidic chip body (1), the convex body (422) of the extrusion piece (42) drives the elastic piece (41) to enter the limiting groove (432) through the strip-shaped groove (431) on the limiting block (43), the limiting block (43) is enabled to deform and clamp and fix the extrusion piece (42) and the elastic piece (41), so that the puncturing piece (31) extending out of the pushing handle (2) is positioned, at the moment, the puncturing piece (31) extends out of the pushing handle (2), two ends of the elastic piece (41) are respectively located in side holes on two sides of the pushing handle (2), and then the pushing handle (2) is enabled to puncture the diluent bag through the puncturing piece (31).
  2. 2. The microfluidic chip detection device according to claim 1, wherein the limiting block (43) is symmetrically provided with extrusion inclined planes (433) at two sides of the strip-shaped groove (431).
  3. 3. The microfluidic chip detection device according to claim 1, wherein the support plate (34) has an inverted L-shaped structure.
  4. 4. The microfluidic chip detection device according to claim 1, wherein the outer end of the push rod (37) is hinged with a bending rod (38) through a pin shaft.

Description

Microfluidic chip detection device Technical Field The invention relates to the technical field of microfluidic chips, in particular to a microfluidic chip detection device. Background The micro-fluidic chip is a miniaturized technical platform, and the core principle is that the micro-scale fluid mechanics is used for realizing the accurate control of liquid, and the micro-fluidic chip has the characteristics of high integration level, low sample consumption, quick response, high sensitivity and the like. In the prior art, when the microfluidic chip detection device is used, the diluting liquid bag needs to be pierced by pushing the piercing mechanism, so that the diluting liquid in the diluting liquid bag can flow into the reaction cavity of the microfluidic chip body for corresponding detection experiments, but the piercing mechanism and the diluting liquid bag are packaged together, the diluting liquid bag is easy to pierce by self-collision with the piercing mechanism and pushing parts in the transportation and transfer process, and the diluting liquid flows out in advance, so that the subsequent detection effect is affected. Disclosure of Invention The present invention is directed to a microfluidic chip detection device, which overcomes the above-mentioned drawbacks of the prior art. The microfluidic chip detection device comprises a microfluidic chip body, wherein a bag cavity for placing a diluent bag is arranged on the microfluidic chip body, a pushing handle is connected in the bag cavity in a sliding manner, and the microfluidic chip detection device further comprises a piercing assembly and a limiting assembly; the puncture assembly is arranged in the push handle and punctures the dilution liquid bag when the puncture plate extends out of the push handle; the limiting component is arranged in the pushing handle and used for positioning the pushing handle which is not moved and positioning the puncturing piece which extends out of the pushing handle. Preferably, the puncture assembly further comprises a guide rod, a support plate, a spring and a push rod, wherein the guide rod is arranged between the inner wall of the push handle and the fixed block in the push handle, the support plate is connected to the guide rod in a sliding manner through a sliding block at the lower side of the support plate, the puncture plate is arranged on the side surface of the support plate and extends out of a slot hole at the inner end of the push handle, the spring is sleeved on the guide rod and is used between the inner wall of the push handle and the sliding block, the push rod is connected to the push handle in a sliding manner, the inner end of the push rod is connected with the support plate, and the outer end of the push rod extends out of a pressing groove of the push handle. Preferably, the limiting component comprises an elastic sheet, an extrusion piece and a limiting block, wherein the elastic sheet is arranged in the pushing handle, two ends of the elastic sheet extend out of side holes on two sides of the pushing handle respectively and are inserted into positioning grooves on the inner wall of the capsule cavity, the extrusion piece is arranged on the side surface of the support plate, the limiting block is arranged on the inner wall of the pushing handle and is opposite to the extrusion piece, and the elastic sheet is arranged between the extrusion piece and the limiting block. Preferably, the extrusion comprises a riser and a convex body, wherein the convex body is connected with the support plate through the riser, and the convex body is of a cylindrical structure. Preferably, the limiting block is made of elastic materials, a bar-shaped groove is formed in the end portion of the limiting block, the bar-shaped groove is communicated with the limiting groove on the limiting block, and the limiting groove is of a cylindrical structure. Preferably, the limiting blocks are symmetrically provided with extrusion inclined planes at two sides of the strip-shaped groove. Preferably, the support plate is of an inverted L-shaped structure. Preferably, the outer end of the push rod is hinged with a bending rod through a pin shaft. The beneficial effects achieved by the invention are as follows: 1. According to the application, the push handle is positioned in the microfluidic chip body through the elastic sheet, so that the push handle is prevented from sliding at will to squeeze and crush the diluent bag in the transportation and transfer process, the outer end of the push rod is well extended into the pressing groove of the push handle, the bending rod is bent by 90 degrees, the push rod is prevented from being pressed, the puncture sheet is simultaneously retracted into the push handle under the action of the elastic force of the spring, and the puncture sheet is prevented from being contacted with the diluent bag to puncture the diluent bag in advance. 2. According to the application, the elastic piece i