Pretreatment device for detecting hair sample

Abstract

The utility model relates to the field of hair sample detection, in particular to a pretreatment device for detecting hair samples, which comprises a shell, an upper cover is mounted above the shell through a hinge, a cleaning cavity is arranged above the inside of the shell, a metal bottom plate is arranged at the bottom of the cleaning cavity, and a plurality of transducers are arranged at the bottom of the metal bottom plate in a rectangular array manner. An ultrasonic generator is mounted at the lower part in the shell; the hair positioning mechanism is arranged at the upper end of the cleaning cavity, a movable rod is fixedly installed on one side of the hair positioning mechanism, a transmission rod is fixedly installed on the other side of the hair positioning mechanism, a fixed roller is arranged at the rear end in the hair positioning mechanism, a clamping roller is installed at the front end in the hair positioning mechanism, and the fixed roller and the clamping roller clamp and position hair after being closed together. The utility model solves the problem that stubborn substances on hair are difficult to thoroughly remove, so that the detection process is interfered.

Description

Technical Field

[0001] The utility model relates to the technical field of hair sample detection, in particular to a pretreatment device for detecting hair samples. Background Art

[0002] Hair sample testing is a detection technology based on the presence of specific substances in hair. Based on the principle of fixation and migration of substances in hair, substances enter the hair follicles through blood circulation. Drug precursors and their metabolites are fixed by the keratin in the hair and stably retained in the hair. Through specific detection methods, the target substances in the hair can be analyzed to infer relevant information about the individual being tested. The content of trace elements in hair, such as calcium, iron, and zinc, can be measured to assess the nutritional status of the individual being tested. As hair grows, it picks up various impurities, such as dust, oil, and sweat, which may affect the accuracy of test results. Pretreatment can remove these impurities and reduce interference factors.

[0003] The Chinese utility model patent with announcement number CN217845800U discloses a hair sample pretreatment device for drug detection, including a bottom box and a top cover. The top cover is movably connected to the top of the bottom box. The bottom box includes a box body, a grinder, a discharge pipe, a fixing rod, a cleaner, a first motor, a slide rail, a hydraulic rod, a fixing pad, a bottom plate, a second motor, a moving rod, a fan, a heater, a fixing block and a battery. The grinder is arranged on the left side of the box body, the discharge pipe is movably connected to one side of the grinder, the fixing rod is movably installed below the discharge pipe, the cleaner is arranged at one end of the grinder, and the first motor is arranged at the other end of the cleaner.

[0004] Although the above-mentioned prior art involves a cleaning structure during the pre-treatment of hair, the cleaning structure is relatively simple and it is difficult to completely remove stubborn substances on the hair, thereby interfering with the detection process. Utility Model Content

[0005] The purpose of the present invention is to provide a pretreatment device for testing hair samples, so as to solve the problem in the above background art that stubborn substances on the hair are difficult to completely remove, thereby interfering with the testing process.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A pretreatment device for testing hair samples, comprising a housing, an upper cover connected to the upper portion of the housing via a hinge, a cleaning chamber, and a hair positioning mechanism;

[0008] The cleaning chamber is arranged above the interior of the shell and a metal base plate is provided at the bottom. A plurality of transducers are provided at the bottom of the metal base plate in a rectangular array. An ultrasonic generator is installed below the interior of the shell and is electrically connected to the transducer.

[0009] The hair positioning mechanism is arranged at the upper end of the cleaning chamber. A movable rod is fixedly installed on one side of the hair positioning mechanism and a transmission rod is fixedly installed on the other side. The movable rod and the transmission rod are respectively slidably connected to the outer shell. A fixed roller is provided at the rear end of the hair positioning mechanism and a clamping roller is installed at the front end. The fixed roller and the clamping roller are clamped and positioned when they are closed together.

[0010] Preferably, a transmission mechanism is provided at the rear end of the shell, a limiting slide groove is provided at the upper end inside the transmission mechanism, the transmission rod extends to the inside of the limiting slide groove and a rack is provided on the side thereof located at one end of the limiting slide groove, a motor is fixedly provided inside the transmission mechanism, a sector gear is installed on the output shaft of the motor and the sector gear is meshed with the rack, and a first spring is provided between the end of the movable rod located outside the shell and the shell.

[0011] Preferably, a sliding groove is provided inside the side wall of the hair positioning mechanism, a sliding block is slidably installed inside the sliding groove, a second spring is installed between the sliding block and the sliding groove, and one side of the sliding block is connected to the clamping roller through a rotating shaft.

[0012] Preferably, a servo motor is installed at the rear end inside the side wall of the hair positioning mechanism, and the output shaft of the servo motor is fixed to the shaft at one end of the fixed roller.

[0013] Preferably, a spray pipe is provided at the front end of the cleaning chamber, a plurality of equally spaced nozzles are provided at the rear end of the spray pipe, a spray water inlet pipe is installed at the middle position of the front end of the spray pipe and one end of the spray water inlet pipe extends to the outside of the shell.

[0014] Preferably, a cleaning liquid inlet pipe is provided above one side of the shell and a cleaning liquid outlet pipe is provided below the one side of the shell.

[0015] Preferably, air-drying mechanisms are provided on both sides of the interior of the upper cover, and the air-drying mechanisms are composed of a fan and a heating wire.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. The pretreatment device of the present invention turns on the ultrasonic generator, which generates high-frequency electrical signals through an electronic oscillation circuit. These signals are amplified and transmitted to the transducer. The transducer converts the received electrical signals into high-frequency mechanical vibrations. These vibrations propagate in the cleaning liquid to form ultrasonic waves. When the ultrasonic waves propagate in the cleaning liquid, they produce sound pressure waves that alternate between compression and rarefaction. These sound pressure waves cause tiny vacuum bubbles to form inside the liquid. During the negative pressure stage of the sound pressure, cavitation bubbles grow rapidly in local low-pressure areas. During the positive pressure stage, the bubbles quickly collapse due to the pressure of the surrounding liquid. The strong local shock waves generated by the cavitation effect can break up and remove dirt, grease and other attachments on the hair surface, and can also form tiny eddies between hair fibers, which help to further disperse and emulsify dirt, promote effective contact and reaction between the cleaning liquid and pollutants, and facilitate the thorough removal of stubborn substances on the hair, providing effective guarantee for the smooth progress of subsequent detection work. At the same time, the cleaning structure causes less physical damage to the hair itself, because the cleaning effect is mainly achieved through acoustic vibration and cavitation effect, avoiding the damage that mechanical friction and chemical corrosion may cause to the hair, and is also conducive to improving the accuracy of subsequent test results.

[0018] 2. This utility model utilizes a spray pipe and an air-drying mechanism to treat hair after ultrasonic cleaning. Opening the cleaning liquid drain pipe allows for convenient drainage or recycling of the used cleaning liquid. Opening the spray water inlet valve allows for the delivery of cleaning water to the spray pipe, where it is then sprayed onto the hair by the nozzle, ensuring even coverage of each hair. This effectively removes any remaining dirt and traces of cleaning liquid without damaging the hair's natural structure and sheen. After the spraying process is complete, the air-drying mechanism's heating wire and fan are activated to thoroughly and evenly dry the cleaned hair. During the drying process, the airflow not only helps remove excess moisture from the hair but also promotes drying and restoration of the hair surface.

[0019] 3. The present invention is equipped with a hair positioning mechanism. To position hair, the user simply pulls the clamping roller to create a gap between the fixed roller and the clamping roller, places the hair into the gap, and releases the clamping roller. The second spring, with its return support, squeezes the hair and secures it between the clamping roller and the fixed roller. Simultaneously, the servo motor is activated, causing its output shaft to rotate the fixed roller, thereby adjusting the position of the hair and ensuring that the entire hair is thoroughly cleaned. During the cleaning process, the motor below the sector gear is activated. The sector gear meshes with the rack, driving the hair positioning mechanism to move to one side via the transmission rod. The sector gear then loses its meshing with the rack, and the first spring resets the hair positioning mechanism to the other side. This reciprocating motion allows the hair positioning mechanism to move the secured hair back and forth, enabling precise adjustment of the hair's position and ensuring that the entire hair is evenly and fully exposed to the cleaning solution, thereby achieving a comprehensive cleaning effect. Moreover, after the motor drives the sector gear to rotate and engage with the rack, the transmission rod drives the hair positioning mechanism to move back and forth. This dynamic cleaning method helps to increase the contact area and contact time between the cleaning liquid and the hair, further improving the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional diagram of the utility model;

[0021] Figure 2 This is a top view of the internal structure of the utility model after removing the upper cover;

[0022] Figure 3 This is a front view of the internal structure of the utility model after the upper cover is opened;

[0023] Figure 4 For the utility model Figure 2 A partial enlarged view of area A in the middle.

[0024] Figure numerals: 1. outer shell; 2. upper cover; 3. movable rod; 4. first spring; 5. spray water inlet pipe; 6. cleaning liquid inlet pipe; 7. cleaning liquid discharge pipe; 8. air drying mechanism; 9. cleaning chamber; 10. transmission rod; 11. transmission mechanism; 12. limiting slide groove; 13. rack; 14. fan gear; 15. spray pipe; 16. nozzle; 17. hair positioning mechanism; 18. fixed roller; 19. clamping roller; 20. metal bottom plate; 21. transducer; 22. ultrasonic generator; 23. sliding groove; 24. sliding block; 25. second spring; 26. servo motor. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0026] like Figures 1 to 3 As shown, the present invention provides an embodiment of a pretreatment device for testing hair samples, comprising a housing 1, with an upper cover 2 mounted above the housing 1 and connected to the housing 1 via a hinge. The device also includes a cleaning chamber 9, disposed above the interior of the housing 1. A metal base plate 20 is disposed at the bottom of the cleaning chamber 9. A plurality of transducers 21 are arranged in a rectangular array on the bottom of the metal base plate 20. An ultrasonic generator 22 is mounted below the interior of the housing 1 and is electrically connected to the transducers 21.

[0027] By turning on the ultrasonic generator 22, the ultrasonic generator 22 generates high-frequency electrical signals through an electronic oscillation circuit. These signals are amplified and transmitted to the transducer 21. The transducer 21 converts the received electrical signals into high-frequency mechanical vibrations. These vibrations propagate in the cleaning liquid to form ultrasonic waves. When ultrasonic waves propagate in the cleaning liquid, they generate sound pressure waves that alternate between compression and rarefaction. These sound pressure waves cause tiny vacuum bubbles to form inside the liquid. In the negative pressure stage of the sound pressure, cavitation bubbles grow rapidly in local low-pressure areas, while in the positive pressure stage, the bubbles collapse rapidly due to the pressure of the surrounding liquid. The strong local shock waves generated by the cavitation effect can break up and detach dirt, grease and other attachments on the hair surface, and can also form tiny vortices between hair fibers, which helps to further disperse and emulsify dirt and promote effective contact and reaction between the cleaning liquid and pollutants.

[0028] like Figures 2 to 4As shown, the pretreatment device for testing hair samples of the present invention also includes a hair positioning mechanism 17, which is disposed at the upper end of the cleaning chamber 9. A movable rod 3 is fixedly mounted on one side of the hair positioning mechanism 17, and a transmission rod 10 is fixedly mounted on the other side of the hair positioning mechanism 17. The movable rod 3 and the transmission rod 10 are each slidably connected to the housing 1. A fixed roller 18 is disposed at the rear end of the hair positioning mechanism 17, and a clamping roller 19 is mounted at the front end of the hair positioning mechanism 17. When the fixed roller 18 and the clamping roller 19 are brought together, they clamp and position the hair, facilitating adjustment of the hair position. Each sidewall of the hair positioning mechanism 17 is provided with a sliding groove 23, within which a sliding block 24 is slidably mounted. A second spring 25 is installed between the sliding block 24 and the sliding groove 23. One side of the sliding block 24 is connected to the clamping roller 19 via a rotating shaft. A servo motor 26 is installed at the rear end of the sidewall of the hair positioning mechanism 17. The output shaft of the servo motor 26 is fixed to the shaft at one end of the fixed roller 18. A transmission mechanism 11 is provided at the rear end of the housing 1. A limit groove 12 is provided at the upper end of the transmission mechanism 11. A transmission rod 10 extends into the limit groove 12. A rack 13 is provided on the side of the transmission rod 10 located at one end of the limit groove 12. A motor is fixedly mounted within the transmission mechanism 11. A sector gear 14 is mounted on the output shaft of the motor, which meshes with the rack 13. A first spring 4 is provided between the end of the movable rod 3 located outside the housing 1 and the housing 1.

[0029] To position the hair, the user simply pulls the clamping roller 19, creating a gap between the fixed roller 18 and the clamping roller 19, allowing the hair to be placed into the gap. After releasing the clamping roller 19, the clamping roller 19, under the return force of the second spring 25, squeezes the hair, thereby securing it between the clamping roller 19 and the fixed roller 18. The output shaft of the servo motor 26 can drive the fixed roller 18 to rotate, thereby adjusting the position of the hair and ensuring that the entire hair is fully cleaned. During the cleaning process, the motor below the sector gear 14 is turned on to rotate. Under the meshing action of the rack 13, the hair positioning mechanism 17 is driven to move to one side via the transmission rod 10. The sector gear 14 then loses mesh with the rack 13, and the return force of the first spring 4 resets the hair positioning mechanism 17 to the other side. This reciprocating motion causes the hair positioning mechanism 17 to move the secured hair back and forth, fully exposing it to the cleaning chamber 9.

[0030] For example Figure 1 、 Figure 2 and Figure 3As shown, a spray pipe 15 is provided at the front end of the cleaning chamber 9, and a plurality of equally spaced nozzles 16 are provided at the rear end of the spray pipe 15. A spray water inlet pipe 5 is installed in the middle of the front end of the spray pipe 15, one end of which extends to the outside of the housing 1. A cleaning liquid inlet pipe 6 is provided above one side of the housing 1, and a cleaning liquid discharge pipe 7 is provided below one side of the housing 1. The cleaning liquid discharge pipe 7 is opened to discharge or recycle the used cleaning liquid. The valve of the spray water inlet pipe 5 is opened to deliver cleaning water to the spray pipe 15. The nozzles 16 then spray the cleaning water onto the hair, helping to evenly cover the hair and effectively remove any remaining dirt and traces of cleaning liquid without damaging the natural structure and sheen of the hair. Air-drying mechanisms 8 are provided on both sides of the interior of the upper cover 2. The air-drying mechanism 8 consists of a fan and a heating wire. The heating wire and the fan of the air-drying mechanism 8 are turned on to dry the washed hair comprehensively and evenly. During the air-drying process, the airflow not only helps to remove excess moisture from the hair, but also promotes the drying and recovery of the hair surface.

[0031] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A pretreatment device for detecting hair samples, comprising a housing (1), an upper cover (2) being hingedly mounted above the housing (1), and characterized in that: It also includes a cleaning chamber (9) and a hair positioning mechanism (17); The cleaning chamber (9) is arranged above the interior of the housing (1) and a metal base plate (20) is provided at the bottom. The bottom of the metal base plate (20) is provided with a plurality of transducers (21) in a rectangular array. An ultrasonic generator (22) is installed below the interior of the housing (1) and the ultrasonic generator (22) is electrically connected to the transducer (21). The hair positioning mechanism (17) is arranged at the upper end of the cleaning chamber (9), a movable rod (3) is fixedly installed on one side of the hair positioning mechanism (17) and a transmission rod (10) is fixedly installed on the other side, the movable rod (3) and the transmission rod (10) are respectively slidably connected to the housing (1), a fixed roller (18) is provided at the rear end of the hair positioning mechanism (17) and a clamping roller (19) is installed at the front end, and the fixed roller (18) and the clamping roller (19) are brought together to clamp and position the hair.

2. The pretreatment device for detecting hair samples according to claim 1, characterized in that: A transmission mechanism (11) is provided at the rear end of the housing (1), a limiting slide groove (12) is provided at the upper end inside the transmission mechanism (11), the transmission rod (10) extends into the interior of the limiting slide groove (12), and a rack (13) is provided on the side of the transmission rod (10) located at one end of the limiting slide groove (12), a motor is fixedly provided inside the transmission mechanism (11), a sector gear (14) is installed on the output shaft of the motor, and the sector gear (14) is meshed with the rack (13), and a first spring (4) is provided between the end of the movable rod (3) located outside the housing (1) and the housing (1).

3. The pretreatment device for detecting hair samples according to claim 2, characterized in that: The side walls of the hair positioning mechanism (17) are each provided with a sliding groove (23), a sliding block (24) is slidably installed inside the sliding groove (23), a second spring (25) is installed between the sliding block (24) and the sliding groove (23), and one side of the sliding block (24) is connected to the clamping roller (19) via a rotating shaft.

4. The pretreatment device for detecting hair samples according to claim 3, characterized in that: A servo motor (26) is installed at the rear end of the side wall of the hair positioning mechanism (17), and the output shaft of the servo motor (26) is fixed to the shaft at one end of the fixed roller (18).

5. The pretreatment device for detecting hair samples according to any one of claims 1 to 4, characterized in that: A spray pipe (15) is provided at the front end of the cleaning chamber (9), and a plurality of equally spaced spray heads (16) are provided at the rear end of the spray pipe (15). A spray water inlet pipe (5) is installed at the middle position of the front end of the spray pipe (15), and one end of the spray water inlet pipe (5) extends to the outside of the housing (1).

6. The pretreatment device for testing hair samples according to claim 5, characterized in that: A cleaning liquid inlet pipe (6) is provided above one side of the housing (1), and a cleaning liquid outlet pipe (7) is provided below the one side.

7. The pretreatment device for detecting hair samples according to claim 6, characterized in that: Air drying mechanisms (8) are provided on both sides of the interior of the upper cover (2), and the air drying mechanisms (8) are composed of a fan and a heating wire.

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