Hand-held gas detector for oral cavity

Abstract

The handheld gas detector comprises a shell, one side of the shell is provided with a gas channel penetrating through the shell, the side, close to the input end of the shell, of the inner side wall of the gas channel is concaved inwards to form a sliding groove, a piston is connected into the sliding groove in a sliding mode, and the piston is connected with the shell in a sliding mode. The side, close to the output end of the shell, of the piston protrudes to form an extending part. The utility model relates to the technical field of gas detectors. According to the handheld gas detector for the oral cavity, the sliding groove and the piston are arranged and can be used for prompting the amount of exhaled gas, so that the gas sensitive detection assembly has enough gas samples for detection, the detection precision of the handheld gas detector for the oral cavity can be effectively improved, and the health prompt of the oral cavity is more accurate; therefore, the practicability of the handheld gas detector for the oral cavity is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas detectors, in particular to a handheld gas detector for oral cavity. Background Art

[0002] Gas detector is an instrument tool for detecting gas leakage concentration, including portable gas detector, handheld gas detector, fixed gas detector, online gas detector, etc. Gas sensors are mainly used to detect the types of gases in the environment. Gas sensors are sensors used to detect the composition and content of gases.

[0003] In the prior art, bad breath is also called oral odor, which refers to the odor emitted from the mouth or other air-filled cavities, such as the nasal cavity, sinus, pharyngeal cavity, etc. It is not only a manifestation of local or systemic diseases, but also seriously affects people's social interaction and mental health. When detecting bad breath, due to different physical constitutions, people's lung capacity is different, so the total amount of exhaled gas is different. When the amount of exhaled gas is relatively small, less gas will come into contact with the gas sensor, which will affect the detection accuracy of the gas sensor. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the present utility model is to provide a handheld gas detector for oral use, so as to solve the technical problems mentioned in the above background technology.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions:

[0006] A handheld gas detector for oral use comprises a shell, an airway penetrating the shell is provided on one side of the shell, a slide groove is formed inwardly on the inner side wall of the airway near the input end of the shell, a piston is slidably connected in the slide groove, an extension portion is formed on the piston protruding on the side near the output end of the shell, an exhaust groove penetrating the piston and the extension portion is provided on one side of the piston, a gas-sensitive detection component is fixedly connected to the inner bottom wall of the exhaust groove, a controller is embedded in the bottom of the output end of the shell, a battery is embedded in the top of the output end of the shell, an observation window connected to the slide groove is provided on the top of the shell, and an indicator light is embedded in the shell on one side of the observation window.

[0007] Furthermore, a first baffle is provided on one side of the slide slot close to the input end of the shell, and a top of the first baffle is hinged to an inner side wall of the slide slot located above the airway.

[0008] Furthermore, a bottom of one side of the first baffle close to the input end of the shell is protruded obliquely downward to form an elastic portion, and the elastic portion is located below the airway.

[0009] Furthermore, a second baffle is provided on one side of the piston close to the input end of the shell, and the second baffle is hinged to the outer side wall of the piston above the exhaust groove, and a gap is left between the bottom of the second baffle and the inner bottom wall of the exhaust groove.

[0010] Furthermore, a support spring is provided between a side of the piston close to the input end of the housing and the slide groove, and the support spring is sleeved on the outside of the extension portion.

[0011] Furthermore, a heat dissipation groove is provided on one side of the housing located at the controller, and a protective net is provided at the opening of the heat dissipation groove.

[0012] Furthermore, a pressure touch switch is fixedly connected to the top of the inner side wall of the slide groove, and a squeezing block for squeezing the pressure touch switch is fixedly connected to the side of the piston close to the pressure touch switch.

[0013] In summary, the present invention includes at least one of the following beneficial technical effects:

[0014] 1. This oral handheld gas detector can be used to indicate the amount of exhaled gas by providing a slide groove and a piston, so that the gas-sensitive detection component has sufficient gas samples for detection, which can effectively improve the detection accuracy of the oral handheld gas detector, make the oral health prompt more accurate, and thus improve the practicality of the oral handheld gas detector;

[0015] 2. This handheld oral gas detector is equipped with a pressure-touch switch and a squeezing block, which can automatically detect gas components when in use and automatically shut down after the detection. This can effectively reduce the difficulty of using the handheld oral gas detector and effectively extend the battery life of the handheld oral gas detector. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 The utility model is a structural schematic diagram of a handheld gas detector for oral cavity.

[0018] Figure 2The utility model is a schematic diagram of the internal structure of a handheld gas detector for oral use.

[0019] Figure 3 The utility model is a schematic diagram of the structure of a piston in a handheld gas detector for oral use.

[0020] In the figure, 1. shell; 2. airway; 3. slide groove; 4. piston; 5. extension part; 6. exhaust groove; 7. gas sensitive detection component; 8. controller; 9. battery; 10. observation window; 11. indicator light; 12. first baffle; 13. elastic part; 14. second baffle; 15. support spring; 16. heat dissipation groove; 17. protective net; 18. pressure touch switch; 19. extrusion block. DETAILED DESCRIPTION

[0021] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0022] Example:

[0023] Reference Figure 1 - Figure 3 The utility model discloses a handheld gas detector for oral use, comprising a shell 1, an airway 2 penetrating the shell 1 is provided on one side of the shell 1, a slide groove 3 is formed inwardly on the inner side wall of the airway 2 near the input end of the shell 1, a piston 4 is slidably connected in the slide groove 3, and an extension portion 5 is formed on the side of the piston 4 near the output end of the shell 1, an exhaust groove 6 penetrating the piston 4 and the extension portion 5 is provided on one side of the piston 4, a gas-sensitive detection component 7 is fixedly connected to the inner bottom wall of the exhaust groove 6, a controller 8 is embedded at the bottom of the output end of the shell 1, a battery 9 is embedded at the top of the output end of the shell 1, an observation window 10 connected to the slide groove 3 is provided on the top of the shell 1, and an indicator light 11 is embedded on the shell 1 at one side of the observation window 10.

[0024] In this embodiment, when detecting oral health, a disposable mouthpiece is put on the input end of the shell 1, and then air is blown into the mouthpiece so that the gas in the mouth enters the airway 2 through the mouthpiece, and then the gas passes through the airway into the slide groove 3. When the gas contacts the piston 4, the gas will be blocked by the piston 4, so that the gas can only be discharged through the exhaust groove 6 of the piston 4. The exhausted air will contact the gas-sensitive detection component 7, and then the gas composition will be detected by the gas-sensitive detection component 7, and the health of the oral cavity will be indicated by the indicator light 11.

[0025] Because the cross-section of the exhaust groove 6 is small and the area through which air can pass is reduced, the air discharge speed in the chute 3 is slower than the air intake speed. At this time, the air pressure in the chute 3 increases, and then the air pushes the piston 4 to slide. The displacement of the piston 4 can be observed through the observation window 10, and by marking scale lines on the observation window 10, it can be used to indicate the gas storage in the chute 3. When the air storage in the chute 3 reaches the standard, blowing can be stopped, and then the oral cavity detection result can be given after waiting for the air to be completely discharged from the chute 3. By increasing the detection amount of gas, the detection accuracy of the air in the oral cavity can be effectively improved.

[0026] Because the gas-sensitive detection component 7 uses gas-sensitive semiconductor materials, the conductivity changes with the concentration of the gas to be tested. The conductivity change value can be converted into an output signal corresponding to the gas concentration through the detection circuit. Therefore, a controller 8 for receiving signals is provided in the shell 1, which is used to analyze the detection data of the gas-sensitive detection component 7 and indicate the health of the oral cavity through the indicator light 11. When the indicator light 11 is green, it indicates that the oral cavity is healthy, when it is yellow, it indicates a mild bad odor in the oral cavity, and when it is red, it indicates that the bad odor in the oral cavity is more serious, making the use of the handheld gas detector for the oral cavity simpler and easier to understand.

[0027] Because the gas-sensitive detection component 7, the controller 8 and the indicator light 11 all require electricity, a battery 9 is provided in the housing 1 to supply power to the gas-sensitive detection component 7, the controller 8 and the indicator light 11, making the use of the oral handheld gas detector more convenient.

[0028] In a further preferred embodiment of the present invention, Figure 2 As shown, a first baffle 12 is provided on one side of the slide slot 3 close to the input end of the housing 1 , and the top of the first baffle 12 is hinged to the inner side wall of the slide slot 3 located above the airway 2 .

[0029] In this embodiment, by providing a first baffle 12, the airway 2 can be blocked when the piston 4 is reset to prevent the gas in the slide groove 3 from flowing back, so that the gas can only be discharged through the exhaust groove 6 of the piston 4, thereby ensuring the detection accuracy of the gas-sensitive detection component 7.

[0030] In a further preferred embodiment of the present invention, Figure 2 As shown, a bottom of one side of the first baffle 12 close to the input end of the housing 1 protrudes obliquely downward to form an elastic portion 13 , and the elastic portion 13 is located below the airway 2 .

[0031] In this embodiment, by providing an elastic portion 13 at the bottom of the first baffle 12, after the piston 4 is reset, when the air pressure in the slide groove 3 is restored to balance, the pressure on both sides of the first baffle 12 is the same. At this time, the elastic portion 13 returns to its original state, lifts up the first baffle 12, and creates a gap between the first baffle 12 and the airway 2 for air to pass through, which is used to maintain the air flow in the airway 2 at a low level, avoiding the residual gas in the airway 2, but preventing the air flow from being too fast to blow particles such as dust in the air into the airway 2.

[0032] In a further preferred embodiment of the present invention, Figure 2 and Figure 3 As shown, a second baffle 14 is provided on one side of the piston 4 close to the input end of the housing 1, and the second baffle 14 is hinged to the outer side wall of the piston 4 above the exhaust groove 6, and a gap is left between the bottom of the second baffle 14 and the inner bottom wall of the exhaust groove 6.

[0033] In this embodiment, by providing a second baffle 14 and leaving a gap between the bottom of the second baffle 14 and the inner bottom wall of the exhaust groove 6, the cross-section through which air can flow can be further reduced, thereby further slowing down the exhaust efficiency of air, so that the gas-sensitive detection component 7 can maintain contact with the gas in the oral cavity for a longer time, thereby further enhancing the detection accuracy.

[0034] The second baffle 14 and the first baffle 12 are both connected by a hinge, so that when the shell 1 is flipped, the first baffle 12 and the second baffle 14 will open under the action of gravity, and then the air can quickly pass through the airway, and the airway 2 is cleaned by the high-speed circulation of air, so that the oral handheld gas detector can quickly clean the residual gas in the airway 2 when it needs to be used multiple times.

[0035] In a further preferred embodiment of the present invention, Figure 2 As shown, a support spring 15 is provided between the side of the piston 4 close to the input end of the housing 1 and the slide groove 3 , and the support spring 15 is sleeved on the outer side of the extension portion 5 .

[0036] In this embodiment, by providing a support spring 15, the piston 4 can be pushed to reset after the gas input in the slide groove 3 stops. Then the piston 4 applies pressure to the air in the slide groove 3 so that the air can be continuously discharged through the exhaust groove 6, so that the gas-sensitive detection component 7 can continue to contact the gas in the oral cavity, thereby improving the detection accuracy.

[0037] In a further preferred embodiment of the present invention, Figure 2 As shown, a heat dissipation slot 16 is provided on one side of the housing 1 located at the controller 8 , and a protective net 17 is provided at the opening of the heat dissipation slot 16 .

[0038] In this embodiment, by providing the heat dissipation slot 16, the controller 8 can be cooled to avoid overheating of the controller 8 and affecting the service life, thereby extending the service life of the oral handheld gas detector.

[0039] In a further preferred embodiment of the present invention, Figure 2 As shown, a pressure-touch switch 18 is fixedly connected to the top of the inner wall of the slide groove 3 , and a squeezing block 19 for squeezing the pressure-touch switch 18 is fixedly connected to the side of the piston 4 close to the pressure-touch switch 18 .

[0040] In this embodiment, by providing a pressure touch switch 18 and a squeezing block 19, when gas is injected into the slide groove 3 to push the piston 4 to slide, the squeezing block 19 is separated from the pressure touch switch 18, and then the pressure touch switch 18 sends a signal to the gas-sensitive detection component 7 and the controller 8 for detecting oral health. Then, when the air in the slide groove 3 is completely discharged, the squeezing block 19 squeezes the pressure touch switch 18 again. At this time, the pressure touch switch 18 sends a signal to the gas-sensitive detection component 7 and the controller 8 again, causing the gas-sensitive detection component 7 and the controller 8 to stop running after a delay of 5 seconds, thereby reducing power loss, thereby extending the battery life of the oral handheld gas detector after ensuring that the user can clearly see the oral health feedback.

[0041] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A handheld gas detector for oral use, comprising a housing (1), characterized in that: An air passage (2) penetrating the shell (1) is provided on one side of the shell (1); a slide groove (3) is formed inwardly on the inner side wall of the air passage (2) near the input end of the shell (1); a piston (4) is slidably connected in the slide groove (3); an extension portion (5) is formed on the piston (4) near the output end of the shell (1); an exhaust groove (6) penetrating the piston (4) and the extension portion (5) is provided on one side of the piston (4); an air-sensitive detection component (7) is fixedly connected to the inner bottom wall of the exhaust groove (6); a controller (8) is embedded at the bottom of the output end of the shell (1); a storage battery (9) is embedded at the top of the output end of the shell (1); an observation window (10) communicating with the slide groove (3) is provided on the top of the shell (1); an indicator light (11) is embedded on the shell (1) at one side of the observation window (10).

2. A handheld gas detector for oral cavity according to claim 1, characterized in that: A first baffle (12) is provided on one side of the slide groove (3) close to the input end of the housing (1), and the top of the first baffle (12) is hingedly connected to the inner side wall of the slide groove (3) located above the airway (2).

3. A handheld oral gas detector according to claim 2, characterized in that: The bottom of one side of the first baffle (12) close to the input end of the housing (1) is protruded obliquely downward to form an elastic portion (13), and the elastic portion (13) is located below the airway (2).

4. The oral handheld gas detector according to claim 1, characterized in that: A second baffle (14) is provided on one side of the piston (4) close to the input end of the housing (1); the second baffle (14) is hingedly connected to the outer side wall of the piston (4) located above the exhaust groove (6); and a gap is left between the bottom of the second baffle (14) and the inner bottom wall of the exhaust groove (6).

5. The handheld oral gas detector according to claim 1, characterized in that: A support spring (15) is provided between the side of the piston (4) close to the input end of the housing (1) and the slide groove (3), and the support spring (15) is sleeved on the outside of the extension portion (5).

6. The handheld oral gas detector according to claim 1, characterized in that: The housing (1) is provided with a heat dissipation groove (16) on one side of the controller (8), and a protective net (17) is provided at the opening of the heat dissipation groove (16).

7. The oral handheld gas detector according to claim 1, characterized in that: A pressure-touch switch (18) is fixedly connected to the top of the inner wall of the slide groove (3), and a squeezing block (19) for squeezing the pressure-touch switch (18) is fixedly connected to the side of the piston (4) close to the pressure-touch switch (18).

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