Blowing alcohol detector

Abstract

The utility model discloses an air blowing alcohol detector which comprises a shell of a hollow structure and an air nozzle located on the outer side of the shell, and an accommodating cavity is formed in the shell; an alcohol detection device and an air inlet pipe are further arranged in the containing cavity, a through hole is formed in the front end of the shell in a hollowed-out mode, one end of the air inlet pipe is connected to the alcohol detection device, the other end of the air inlet pipe penetrates through the through hole and is connected to the air nozzle, the air inlet pipe is configured to transmit air blown in from the air nozzle into the alcohol detection device, and the alcohol detection device is configured to detect the alcohol concentration of the air; the air inlet pipe comprises a telescopic part, and the telescopic part can stretch out and draw back to adjust the length so that the air nozzle can be movably arranged on the shell. According to the blowing alcohol detector provided by the invention, a user can pull the air nozzle to a position close to the mouth part for blowing by virtue of extension of the air inlet pipe, so that the blowing alcohol detector is relatively convenient to use and operate; and the air nozzle can be retracted to a position close to the shell by shortening the air inlet pipe, and the air inlet pipe can be retracted into the accommodating cavity, so that the blowing alcohol detector is more integral and concise in appearance.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, specifically to a breathalyzer. Background Technology

[0002] Existing commercially available vehicle-mounted breathalyzers typically consist of a measuring device and a control box. The control box connects to the car's ignition or gear shift system. Initially, the control box locks the ignition or gear shift system, preventing the car from moving. When the driver needs to start the car, they hold the measuring device and blow into the nozzle. The device detects the driver's blood alcohol concentration and sends an electrical signal to the control box based on whether the concentration is within acceptable limits. This signal then unlocks the control box or keeps the vehicle locked. Thus, by detecting the driver's blood alcohol concentration and directly controlling the vehicle, the breathalyzer effectively prevents drunk driving at its source.

[0003] However, the above-mentioned alcohol detector has the following problems: the nozzle is fixed to the measuring device, and when the driver needs to measure the alcohol concentration, he / she needs to lift the entire measuring device and blow into it. After the measurement is completed, the measuring device is put back in place, which is inconvenient to use. In addition, the cable between the measuring device and the control box is exposed and not easy to store, which makes the driver's cab look messy and unsightly. Summary of the Invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a breathalyzer that, by movably setting the nozzle on the outside of the housing, allows the length of the air inlet tube to be adjusted via a telescopic part. This enables the user to not only pull the nozzle closer to their mouth by extending the air inlet tube for blowing, making operation more convenient, but also to retract the nozzle back to a position close to the housing by shortening the air inlet tube. In other words, when the breathalyzer is not in use, the air inlet tube can be retracted into the housing cavity, making the breathalyzer more integrated, simple, and aesthetically pleasing.

[0005] The effect of this utility model is achieved as follows:

[0006] This application provides a breathalyzer, including a hollow housing and a nozzle located on the outside of the housing. The cavity inside the housing forms a receiving cavity. An alcohol detection device and an air inlet pipe are also disposed in the receiving cavity. A through hole is cut out at the front end of the housing. One end of the air inlet pipe is connected to the alcohol detection device, and the other end passes through the through hole and is connected to the nozzle. The air inlet pipe is configured to transmit the gas blown in from the nozzle into the alcohol detection device, and the alcohol detection device is configured to detect the alcohol concentration of the gas. The air inlet pipe includes a telescopic part, which can be extended and retracted to adjust its length, so that the nozzle can be movably disposed in the housing.

[0007] Furthermore, an elastic reset component is installed within the receiving cavity. When the nozzle is pulled outwards away from the housing, the elastic reset component applies a reset force to the air inlet pipe, ensuring that the nozzle always tends to retract towards the housing. This allows the user to simply release the nozzle after each use, and the nozzle will automatically retract to a position close to the housing under the pull of the elastic reset component, further enhancing the ease of use.

[0008] Furthermore, the elastic reset assembly includes a fixed disk and a rotating disk. The fixed disk and the housing remain relatively fixed, while the rotating disk is rotatably connected to the fixed disk. An elastic element is provided between the fixed disk and the rotating disk. The air intake pipe is connected to the rotating disk. When the telescopic part extends, the air intake pipe extends and drives the rotating disk to rotate. The elastic element deforms and applies a reset force to the rotating disk, causing the rotating disk to tend to rotate back and drive the air intake pipe to retract. When the air intake pipe is extended or retracted by the air nozzle, it pulls the rotating disk to rotate relative to the fixed disk. The transmission process is simple and relatively stable. Moreover, the elastic element between the fixed disk and the rotating disk pulls the air intake pipe to reset through its elastic deformation, making operation relatively simple.

[0009] Furthermore, the fixed disk and the rotating disk are connected front and rear. The rotating disk protrudes towards the fixed disk to form a support column, while the fixed disk has a recessed mounting cavity near the rotating disk, into which the support column extends. The elastic element is a spring-loaded spring, with one end fixed to the support column and the other end fixed to the inner wall of the mounting cavity. When the rotating disk drives the support column to rotate, the support column applies a torsional force to the elastic element, causing the elastic element to undergo bending elastic deformation and apply a reverse torsional force to the support column. The use of a spring-loaded spring not only provides good strength and stability, but also allows the spring to coil inward as the support column rotates, applying a large torque to the support column, thus making the rotation of the support column more stable.

[0010] Furthermore, the fixed disk and the rotating disk are connected front to back. A support column extending in the front-to-back direction protrudes from the rotating disk, while the fixed disk has a perforated clearance opening. Rotational support holes are recessed on the inner walls of both the front and rear sides of the receiving cavity. The front end of the support column passes through the clearance opening, and both its front and rear ends are engaged in the rotational support holes. The support column can rotate circumferentially within these holes, thereby driving the rotating disk to rotate relative to the fixed disk. This design increases the connection strength between the rotating disk and the housing, making the rotation of the rotating disk more stable.

[0011] Furthermore, the front end of the fixed plate has several first limiting protrusions, and the inner wall of the receiving cavity has corresponding second limiting protrusions. Any one of the first limiting protrusions engages between two adjacent second limiting protrusions, keeping the fixed plate and the housing relatively fixed. This not only ensures a high connection strength and good stability between the fixed plate and the housing, but also makes the installation and disassembly of the fixed plate more convenient.

[0012] Furthermore, a support frame is also provided inside the receiving cavity. The support frame is threaded around the rotating disk and is configured to support the air intake pipe. When the air nozzle is pulled, the air intake pipe moves along the support frame around the rotating disk. By setting a support frame to support the air intake pipe, the extension and retraction process of the air intake pipe is made more stable. Moreover, by having the air intake pipe also revolve around the rotating disk, not only can a longer length of air intake pipe be set, but the extension and retraction of the air intake pipe can also better drive the rotation of the rotating disk, thereby making the extension and adjustment operation of the air nozzle more stable and smooth.

[0013] Furthermore, a positioning groove is formed on the side wall of the rotating disk along the front-to-back direction, and a positioning component is provided on the air intake pipe. A positioning protrusion is provided on the side of the positioning component near the rotating disk, and the positioning protrusion is engaged with the rotating disk through the positioning groove. When the air intake pipe moves around the rotating disk, the positioning protrusion slides back and forth along the positioning groove. By setting the positioning protrusion and positioning groove that engage with each other between the rotating disk and the air intake pipe, not only is the connection between the two strengthened, allowing the air intake pipe to drive the rotating disk to rotate, but the transmission process between the air intake pipe and the rotating disk is also made smoother, more stable, and more stable.

[0014] Furthermore, the intake pipe also includes a connecting part and a connecting pipe of fixed length. One end of the connecting pipe is inserted into the telescopic part, and the other end is inserted into the connecting part, thereby connecting the telescopic part and the connecting part into a whole. The positioning element is connected to the connecting pipe. This not only connects the connecting part and the telescopic part into a whole, but also makes the positioning element more stable after installation, avoiding affecting the sliding fit between the positioning protrusion and the positioning groove.

[0015] Furthermore, an ignition switch is installed within the housing, configured to control the starting or stopping of the vehicle. An opening is perforated at the front of the housing directly opposite the ignition switch. A cover plate is movably connected to the housing, and the cover plate is connected to the alcohol detection device via a drive assembly. This drive assembly is configured to close or allow the cover plate to pass through the opening based on the detection result from the alcohol detection device. By detecting the alcohol level and directly driving the cover plate to close or allow the opening, the vehicle's ignition system is directly locked or unlocked. This not only simplifies the operation of the breathalyzer and vehicle control, but also completes the detection process before the vehicle is started, reducing fuel consumption.

[0016] The breathalyzer provided in this application features a nozzle that is movably positioned on the outside of the housing, allowing users to install the breathalyzer in the driver's cab. Users simply need to pull the nozzle to their mouths to blow, making operation much simpler. Furthermore, the air inlet tube's length is adjustable via a telescopic section, allowing users to extend the air inlet tube to pull the nozzle further away from the housing, or retract it to a position close to the housing by shortening the air inlet tube. When the breathalyzer is not in use, the air inlet tube can be retracted into the housing, resulting in a more integrated, concise, and aesthetically pleasing appearance.

[0017] Furthermore, by incorporating a flexible reset component, after each use, the user only needs to release the nozzle, and the nozzle will automatically retract to a position close to the housing under the pull of the flexible reset component, further enhancing the ease of use. Attached Figure Description

[0018] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0019] Figure 1 A three-dimensional structural diagram of the breath alcohol detector provided in the embodiments of this application;

[0020] Figure 2 A schematic diagram illustrating the state changes of the breath alcohol detector when the nozzle is pulled out, as provided in this embodiment of the application.

[0021] Figure 3 A schematic diagram of the connection structure between the first housing and the second housing provided in an embodiment of this application;

[0022] Figure 4 A schematic diagram of the internal structure of the housing provided in an embodiment of this application;

[0023] Figure 5 This is a schematic diagram of the connection structure of the elastic reset component provided in the embodiments of this application;

[0024] Figure 6 This is a schematic diagram of the connection structure between the fixed disk and the rotating disk provided in an embodiment of this application;

[0025] Figure 7 A cross-sectional structural schematic diagram of the breath alcohol detector provided in the embodiments of this application;

[0026] Figure 8 A schematic diagram illustrating the state changes of the elastic reset component during the extension and retraction of the air tube, as provided in an embodiment of this application.

[0027] Figure 9 This is a schematic diagram illustrating the change process of the cover plate during sliding, as provided in an embodiment of this application.

[0028] Figure 10 This is a schematic diagram of the connection structure between the drive component and the housing provided in an embodiment of this application.

[0029] The reference numerals in the attached drawings are as follows: 1-Housing, 1a-First housing, 1b-Second housing, 101-Receiving cavity, 102-Through hole, 103-Rotating support hole, 104-Second limiting protrusion, 105-Opening, 110-Cover plate, 120-Servo motor, 121-Gear, 130-Rack, 140-PCB board, 2-Air nozzle, 3-Alcohol detection device, 4-Inlet pipe, 410-Telescopic part, 420-Connecting part, 430-Positioning component, 431-Positioning protrusion, 440-Connecting pipe, 510-Fixing plate, 511-Elastic component, 512-Mounting cavity, 513-Allowing opening, 514-First limiting protrusion, 520-Rotating plate, 521-Support column, 522-Positioning groove, 530-Support frame, 531-Support groove, 6-Ignition switch. Detailed Implementation

[0030] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0031] Please refer to the attached document. Figure 1-10 This application provides a breathalyzer, including a hollow housing 1 and a nozzle 2 located outside the housing 1. The cavity inside the housing 1 forms a receiving cavity 101. An alcohol detection device 3 and an air inlet pipe 4 are also provided in the receiving cavity 101. A through hole 102 is hollowed out at the front end of the housing 1. One end of the air inlet pipe 4 is connected to the alcohol detection device 3, and the other end passes through the through hole 102 and is connected to the nozzle 2. The air inlet pipe 4 is configured to transmit the gas blown in from the nozzle 2 to the alcohol detection device 3, and the alcohol detection device 3 is configured to detect the alcohol concentration of the gas. The air inlet pipe 4 includes a telescopic part 410, which is telescopically adjustable in length, so that the nozzle 2 is movably disposed in the housing 1.

[0032] In this embodiment, by movably positioning the nozzle 2 on the outside of the housing 1, the user can install the breathalyzer in the driver's cab and simply pull the nozzle 2 to their mouth to blow air, making operation more convenient. Furthermore, the length of the air inlet pipe 4 can be adjusted via the telescopic part 410, allowing the user to not only extend the air inlet pipe 4 to pull the nozzle 2 to a position farther from the housing 1, but also retract the nozzle 2 to a position close to the housing 1 by shortening the air inlet pipe 4. That is, when the breathalyzer is not in use, the air inlet pipe 4 can be retracted into the receiving cavity 101, making the breathalyzer more integrated, concise, and aesthetically pleasing.

[0033] Please refer to the attached document. Figure 2-6 In some embodiments of this application, an elastic reset component is provided in the receiving cavity 101. When the air nozzle 2 is pulled out in a direction away from the housing 1, the elastic reset component applies a reset force to the air inlet pipe 4, so that the air nozzle 2 always has a tendency to retract toward the housing 1.

[0034] In this embodiment, by providing an elastic reset mechanism between the air intake pipe 4 and the housing 1, the user does not need to manually reset the air nozzle 2 after each use. The user only needs to release the air nozzle 2, and the air nozzle 2 will automatically retract to a position close to the housing 1 under the pull of the elastic reset component, further improving the ease of use.

[0035] Please refer to the attached document. Figure 5-6 In some embodiments of this application, the elastic reset assembly includes a fixed disk 510 and a rotating disk 520. The fixed disk 510 and the housing 1 are kept relatively fixed. The rotating disk 520 is rotatably connected to the fixed disk 510, and an elastic element 511 is provided between the fixed disk 510 and the rotating disk 520. The air intake pipe 4 is connected to the rotating disk 520. When the telescopic part 410 extends, the air intake pipe 4 extends and drives the rotating disk 520 to rotate. The elastic element 511 deforms and applies a reset elastic force to the rotating disk 520. The rotating disk 520 has a tendency to rotate back and drives the air intake pipe 4 to retract.

[0036] In this embodiment, by setting a rotatable rotating disk 520, when the air intake pipe 4 is driven to extend and retract by the air nozzle 2, the rotating disk 520 is pulled to rotate relative to the fixed disk 510. The transmission process is simple and relatively stable. Furthermore, an elastic element 511 is set between the fixed disk 510 and the rotating disk 520. The elastic deformation of the elastic element 511 pulls the air intake pipe 4 to reset, making the operation relatively simple.

[0037] Please refer to the attached document. Figure 6In some embodiments of this application, the fixed disk 510 and the rotating disk 520 are connected front and rear. The rotating disk 520 protrudes towards the fixed disk 510 to form a support column 521. The fixed disk 510 is recessed at one end near the rotating disk 520 to form a mounting cavity 512. The support column 521 extends into the mounting cavity 512. The elastic element 511 is a spring-loaded spring. One end of the elastic element 511 is fixed to the support column 521, and the other end is fixed to the inner wall of the mounting cavity 512. When the rotating disk 520 drives the support column 521 to rotate, the support column 521 applies a torsional force to the elastic element 511. The elastic element 511 undergoes bending elastic deformation and applies a reverse torsional force to the support column 521.

[0038] In this embodiment, the connection strength between the rotating disk 520 and the fixed disk 510 is increased by the rotatable engagement of the protruding support column 521 on the rotating disk 520 and the mounting cavity 612 at the bottom of the fixed disk 510, resulting in a more stable rotation process for the rotating disk 520. Furthermore, the elastic element 511 is a spring-loaded spring, which not only possesses good strength and stability, but also, as shown in the attached... Figure 8 As shown, when the intake pipe 4 is stretched, the rotating disk 520 drives the support column 521 to rotate. The spring coils inward with the rotation of the support column 521 and can apply a large torque to the support column 521, thereby making the rotation of the support column 521 more stable.

[0039] Of course, in other embodiments of this application, the elastic element 511 may also be a spring, a sheet, etc.

[0040] Please refer to the attached document. Figure 6 In some embodiments of this application, the fixed disk 510 and the rotating disk 520 are connected front to back. The rotating disk 520 has a support column 521 protruding and extending in the front-back direction. The fixed disk 510 has a clearance opening 513. The inner walls of the front and rear sides of the receiving cavity 101 are recessed to form a rotating support hole 103. The front end of the support column 521 passes through the clearance opening 513, and both the front and rear ends of the support column 521 are engaged in the rotating support hole 103. The support column 521 can rotate in its own circumference within the rotating support hole 103, thereby driving the rotating disk 520 to rotate relative to the fixed disk 510.

[0041] In this embodiment, by providing a rotating support hole 103 in the receiving cavity 101, the front and rear ends of the support column 521 are inserted into the rotating support hole 103 and can rotate circumferentially within the rotating support hole 103, thereby increasing the connection strength between the rotating disk 520 and the housing 1 and making the rotation process of the rotating disk 520 more stable.

[0042] Please refer to the attached document. Figure 3In some embodiments of this application, the front end of the fixed disk 510 has a plurality of first limiting protrusions 514, and the inner wall of the receiving cavity 101 has a plurality of corresponding second limiting protrusions 104. Any one of the first limiting protrusions 514 is engaged between two adjacent second limiting protrusions 104, so that the fixed disk 510 and the housing 1 remain relatively fixed. This not only makes the connection between the fixed disk 510 and the housing 1 stronger and more stable, but also makes the installation and disassembly of the fixed disk 510 more convenient.

[0043] Please refer to the attached document. Figure 4-5 In some embodiments of this application, a support frame 530 is also provided in the receiving cavity 101. The support frame 530 is threaded around the rotating disk 520. The support frame 530 is configured to support the air inlet pipe 4. When the air nozzle 2 is pulled, the air inlet pipe 4 moves along the support frame 530 around the rotating disk 520.

[0044] In this embodiment, by setting a support frame 530 to support the air intake pipe 4, the extension and retraction process of the air intake pipe 4 is made more stable. Furthermore, the support frame 530 is threaded around the rotating disk 520, so that the air intake pipe 4 also surrounds the rotating disk 520. This not only allows the air intake pipe 4 to be set to a longer length, that is, the user can stretch the air nozzle 2 a longer distance, but also allows the air intake pipe 4 to move around the rotating disk 520 when it extends and retracts, thereby better driving the rotating disk 520 to rotate, and thus making the extension and adjustment operation of the air nozzle 2 more stable and smooth.

[0045] The upper end of the support frame 530 is recessed to form an arc-shaped support groove 531. The air intake pipe 4 is placed in the support groove 531, so that the air intake pipe 4 is constrained by the support groove 531 and is not easy to fall off the support frame 530, thus improving stability.

[0046] Please refer to the attached document. Figure 6 In some embodiments of this application, a positioning groove 522 is provided on the side wall of the rotating disk 520 along the front-back direction, and a positioning member 430 is provided on the air intake pipe 4. A positioning protrusion 431 is provided on the side of the positioning member 430 near the rotating disk 520. The positioning protrusion 431 is engaged with the rotating disk 520 through the positioning groove 522. When the air intake pipe 4 moves around the rotating disk 520, the positioning protrusion 431 slides back and forth along the positioning groove 522.

[0047] In this embodiment, as the rotating disk 520 moves around the rotating disk 520, its front-to-back position relative to the rotating disk 520 also changes. Therefore, by providing a mutually engaging positioning protrusion 431 and positioning groove 522 between the rotating disk 520 and the intake pipe 4, not only is the connection strength between the two strengthened, allowing the intake pipe 4 to drive the rotating disk 520 to rotate, but also, when the intake pipe 4 extends along the support frame 530, the positioning protrusion 431 slides forward along the positioning groove 522; conversely, when the intake pipe 4 retracts along the support frame 530, the positioning protrusion 431 slides backward along the positioning groove 522. This makes the transmission process between the intake pipe 4 and the rotating disk 520 smoother, more stable, and more stable.

[0048] Please refer to the attached document. Figure 4-6 In some embodiments of this application, the intake pipe 4 further includes a connecting part 420 and a connecting pipe 440 with a fixed length. One end of the connecting pipe 440 is inserted into the telescopic part 410 and the other end is inserted into the connecting part 420, thereby connecting the telescopic part 410 and the connecting part 420 into a whole. The positioning member 430 is connected to the connecting pipe 440.

[0049] In this embodiment, both the connecting part 420 and the telescopic part 410 are flexible hoses. If the positioning member 430 is connected to the connecting part 420 or the telescopic part 410, the positioning member 430 will easily wobble during the extension and retraction of the connecting pipe 4, resulting in poor stability. Therefore, by connecting the positioning member 430 to the rigid connecting pipe 440, not only are the connecting part 420 and the telescopic part 410 connected as a whole, but the positioning member 430 is also more stable after installation, avoiding affecting the sliding fit between the positioning protrusion 431 and the positioning groove 522.

[0050] The positioning component 430 has a Z-shaped structure. The upper part of the positioning component 430, which extends horizontally, is fixed to the connecting tube 440 by screws. The positioning protrusion 431 on the lower side of the positioning component 430 is inserted into the positioning groove 422 of the rotating disk 520, making installation and disassembly relatively convenient.

[0051] The connecting part 420 is connected to the air nozzle 2, and the telescopic part 410 is connected to the alcohol detection device 3, so that when the telescopic part 410 extends or retracts, it can drive the connecting tube 440 at the front end to slide along the support frame 530.

[0052] Please refer to the attached document. Figure 9In some embodiments of this application, an ignition switch 6 is also provided in the receiving cavity 101. The ignition switch 6 is configured to adjust the starting or stopping of the car. An opening 105 is hollowed out at the front end of the housing 1, directly opposite the ignition switch 6. A cover plate 110 is also movably connected to the housing 1. The cover plate 110 and the alcohol detection device 3 are connected by a drive assembly. The drive assembly is configured to drive the cover plate 110 to cover or avoid the opening 105 according to the detection result of the alcohol detection device 3.

[0053] In this embodiment, the alcohol detection device 3 detects the alcohol coefficient and directly drives the cover plate 110 to cover or avoid the opening 105, thereby making the ignition switch 6 exposed inside the housing 1. This directly locks or unlocks the vehicle's ignition system, which not only makes the detection operation of the breathalyzer and the vehicle control operation more convenient, but also completes the detection process before the vehicle is ignited, reducing the car's fuel consumption.

[0054] Please refer to the appendix. Figure 10 The drive mechanism includes a servo motor 120 and a rack 130. A gear 121 is fitted onto the servo motor 120, and the rack 130 meshes with the gear 121. One end of the rack 121 is connected to the cover plate 110. The servo motor 120 is configured to drive the gear 121 to rotate, and the rack 130 is driven to slide horizontally, thereby moving the cover plate 110 together. The alcohol detection device 3 and the servo motor 120 are electrically connected through a PCB board 140. After the alcohol detection device 3 detects the alcohol concentration, it sends an electrical signal to the PCB board 140. The PCB board 140 then sends an electrical signal to the servo motor 120 to control the servo motor 120 to rotate forward or backward. Through the transmission of the gear 121 and the rack 130, the cover plate 110 is moved.

[0055] The housing 1 is a split structure, including a first housing 1a and a second housing 1b that are spliced ​​together. An opening 105 and a cover plate 110 are set in the first housing 1a, and the elastic reset component, alcohol detection device, drive component, etc. are fixed in the second housing 1b, which makes the assembly of the breath alcohol detector relatively simple.

Claims

1. A breathalyzer, characterized in that, The device includes a hollow shell (1) and an air nozzle (2) located outside the shell (1). The cavity inside the shell (1) forms a receiving cavity (101). An alcohol detection device (3) and an air inlet pipe (4) are also provided in the receiving cavity (101). The front end of the shell (1) has a through hole (102). One end of the air inlet pipe (4) is connected to the alcohol detection device (3), and the other end passes through the through hole (102) and is connected to the air nozzle (2). The air inlet pipe (4) is configured to transmit the gas blown in from the air nozzle (2) to the alcohol detection device (3), and the alcohol detection device (3) is configured to detect the alcohol concentration of the gas. The air inlet pipe (4) includes a telescopic part (410), which is telescopically adjustable in length so that the air nozzle (2) is movably disposed in the shell (1).

2. The breathalyzer according to claim 1, characterized in that, An elastic reset component is provided in the receiving cavity (101). When the air nozzle (2) is pulled out in a direction away from the housing (1), the elastic reset component applies a reset force to the air inlet pipe (4), so that the air nozzle (2) always has a tendency to retract toward the housing (1).

3. The breathalyzer according to claim 2, characterized in that, The elastic reset assembly includes a fixed disk (510) and a rotating disk (520). The fixed disk (510) and the housing (1) are kept relatively fixed. The rotating disk (520) is rotatably connected to the fixed disk (510), and an elastic element (511) is provided between the fixed disk (510) and the rotating disk (520). The air intake pipe (4) is connected to the rotating disk (520). When the telescopic part (410) extends, the air intake pipe (4) extends and drives the rotating disk (520) to rotate. The elastic element (511) deforms and applies a reset elastic force to the rotating disk (520). The rotating disk (520) has a tendency to rotate back and drives the air intake pipe (4) to retract.

4. The breathalyzer according to claim 3, characterized in that, The fixed disk (510) and the rotating disk (520) are connected front and rear. The rotating disk (520) protrudes towards the fixed disk (510) to form a support column (521). The fixed disk (510) has a recessed mounting cavity (512) near the rotating disk (520). The support column (521) extends into the mounting cavity (512). The elastic element (511) is a spring. One end of the elastic element (511) is fixed to the support column (521), and the other end is fixed to the inner wall of the mounting cavity (512). When the rotating disk (520) drives the support column (521) to rotate, the support column (521) applies a torsional force to the elastic element (511). The elastic element (511) undergoes bending elastic deformation and applies a reverse torsional force to the support column (521).

5. The breathalyzer according to claim 3, characterized in that, The fixed disk (510) and the rotating disk (520) are connected front and rear. A support column (521) extending in the front and rear direction is formed on the rotating disk (520). A clearance opening (513) is hollowed out on the fixed disk (510). Rotation support holes (103) are recessed on the inner walls of the front and rear sides of the receiving cavity (101). The front end of the support column (521) passes through the clearance opening (513), and both the front and rear ends of the support column (521) are inserted into the rotation support hole (103). The support column (521) can rotate in its own circumference within the rotation support hole (103), thereby driving the rotating disk (520) to rotate relative to the fixed disk (510).

6. The breathalyzer according to claim 3, characterized in that, The front end of the fixed disk (510) has a plurality of first limiting protrusions (514), and the inner wall of the receiving cavity (101) has a plurality of second limiting protrusions (104) respectively. Any one of the first limiting protrusions (514) is inserted between two adjacent second limiting protrusions (104), so that the fixed disk (510) and the housing (1) remain relatively fixed.

7. The breathalyzer according to claim 3, characterized in that, The cavity (101) is also provided with a support frame (530), which is spirally wrapped around the rotating disk (520). The support frame (530) is configured to support the air inlet pipe (4). When the air nozzle (2) is pulled, the air inlet pipe (4) moves along the support frame (530) around the rotating disk (520).

8. The breathalyzer according to claim 7, characterized in that, The rotating disk (520) has a positioning groove (522) on its side wall facing forward and backward. The air intake pipe (4) is provided with a positioning component (430). The positioning component (430) has a positioning protrusion (431) on the side of the rotating disk (520) near the positioning pipe (520). The positioning protrusion (431) is engaged with the rotating disk (520) through the positioning groove (522). When the air intake pipe (4) moves around the rotating disk (520), the positioning protrusion (431) slides forward and backward along the positioning groove (522).

9. The breathalyzer according to claim 8, characterized in that, The intake pipe (4) also includes a connecting part (420) of fixed length and a connecting pipe (440). One end of the connecting pipe (440) is inserted into the telescopic part (410), and the other end is inserted into the connecting part (420), thereby connecting the telescopic part (410) and the connecting part (420) into a whole; the positioning member (430) is connected to the connecting pipe (440).

10. The breathalyzer according to claim 1, characterized in that, An ignition switch (6) is also provided in the receiving cavity (101). The ignition switch (6) is configured to adjust the starting or stopping of the car. An opening (105) is hollowed out at the front end of the housing (1) facing the ignition switch (6). A cover plate (110) is also movably connected to the housing (1). The cover plate (110) and the alcohol detection device (3) are connected by a drive assembly. The drive assembly is configured to drive the cover plate (110) to cover or avoid the opening (105) according to the detection result of the alcohol detection device (3).

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