JP2019032288A - Breath detector - Google Patents

Abstract

To provide a breath detector capable of introducing breathing with no auxiliary pipe from a pipe that flows the breathing to a gas sensor or a flow-in detection sensor and whose assembly is easy.SOLUTION: A breath detector accommodates a substrate on which a gas sensor and a flow-in detection sensor are mounted and a pipe to be a flow path of breathing in a housing. A projection of an attachment is inserted into the pipe to introduce breathing to a recess accommodating the flow-in detection sensor via a hole of the projection. The breathing is supplied to the gas sensor from the hole of the attachment. The attachment is elastic and depressed by a housing and the substrate.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an expiration detection device.

  Some breath detection devices that detect alcohol, acetone, acetaldehyde, and the like branch two pipes from a pipe through which breath flows into a gas sensor and a blow-in detection sensor (Patent Document 1: JP60045356B). The gas sensor is an electrochemical sensor, a metal oxide semiconductor sensor, or the like, and detects chemical components such as alcohol, acetone, and acetaldehyde in breath. The insufflation detection sensor detects that exhalation has been infused with a pressure sensor, a flow rate sensor, a thermistor, or the like.

JP60045356B

  Connecting an auxiliary thin pipe to the pipe for flowing exhalation takes time and effort in assembly. Therefore, it is preferable that exhalation can be introduced from the main pipe through which exhalation flows into the gas sensor or the blowing detection sensor without an auxiliary pipe.

  An object of the present invention is to provide an exhalation detection device that can introduce exhalation and is easy to assemble without an auxiliary pipe from a pipe for flowing exhalation to a gas sensor or a blowing detection sensor.

The present invention relates to a breath detection device in which a substrate on which a gas sensor and a blow detection sensor are mounted, and a pipe serving as a flow path for breath are housed in a housing.
A protrusion having a hole for introducing exhalation and inserted into the pipe; a recess that opens on the substrate side to accommodate the blowing detection sensor and communicates with the hole; and a flow path between the hole and the gas sensor; Provided with an attachment made of an elastic body,
The attachment is compressed by being pressed by the housing and the substrate, and the space between the attachment and the substrate is hermetically sealed.

Further, the present invention provides an exhalation detecting device in which a substrate on which a gas sensor is mounted and a pipe that becomes an exhalation flow path are housed in a housing.
A protrusion having a hole for introduction of breath and being inserted into the pipe; and a recess that opens on the substrate side and accommodates the gas sensor and communicates with the hole, and is provided with an attachment made of an elastic body,
The attachment is compressed by being pressed by the housing and the substrate, and the space between the attachment and the substrate is hermetically sealed.

  In the present invention, the elastic attachment is provided so that the blowing detection sensor or the gas sensor on the substrate is accommodated in the recess. This eliminates the need for an auxiliary pipe connecting the breath pipe and the gas sensor. In this invention, the elastic attachment is sandwiched and compressed between the substrate and the housing, and it is possible to prevent exhalation from leaking from the gap between the attachment and the substrate.

  Preferably, the attachment includes a ring-shaped protrusion surrounding the opening of the recess. The ring-shaped protrusion is pushed and deformed by the compressive force acting from the substrate, and the airtightness between the recess and the substrate is further increased.

Sectional drawing of the exhalation detection apparatus of an Example Plan view of main parts of substrate and pipe in the embodiment The figure which shows an attachment and a board | substrate from a pipe side in an Example. Bottom view of the attachment in the example Sectional view showing the attachment as seen from the pipe side to the gas sensor side Sectional view showing the attachment as seen from the gas sensor side to the pipe side Block diagram of exhalation detection device The figure which shows the attachment of 2nd Example The figure which shows the attachment of a modification

  In the following, an optimum embodiment for carrying out the present invention will be shown.

  1 to 7 show an exhalation detection device 2 of the embodiment. 1 and 2 show a pipe 8, an attachment 10, and the like. A gas sensor 4 is an electrochemical type or metal oxide semiconductor type gas sensor, and the type of the gas sensor 4 is arbitrary. Reference numeral 6 denotes a pressure sensor, which is an example of a blowing detection sensor, and may be an airflow sensor, a thermistor, or the like. 5 is a pump composed of a solenoid or the like, and introduces a predetermined volume of exhaled air into the gas sensor 4 from the pipe 8 via the attachment 10. The pump 5 may not be provided and may be introduced from the pipe 8 to the gas sensor 4 via the attachment 10 by the pressure of exhalation.

  A substrate 12 supports the gas sensor 4, the pump 5, the pressure sensor 6, the attachment 10, and other circuit components. The lower case 14 and the upper case 16 constitute a housing of the exhalation detection device 2, and the pipe 8 through which exhalation flows is supported by the lower case 14 and the upper case 16, for example. Further, the lower case 14 is provided with a plurality of protrusions 15 to support the bottom surface of the substrate 12.

  The attachment 10 is made of a non-continuous porous soft plastic or the like, has elasticity, and introduces exhaled breath into the gas sensor 4 and the pressure sensor 6 from the pipe 8. The projection 17 of the attachment 10 is fitted into the pipe 8 and breath is introduced from the holes 20 and 21 at the tip of the projection 17. Since the attachment 10 is made of an elastic body, it is compressed in the pipe 8 and the space between the protrusion 17 and the pipe 8 is kept airtight.

  A recess 18 connected to the hole 20 is provided, and the recess 18 contacts the substrate 12 at the bottom of the attachment 10. The pressure sensor 6 on the substrate 12 is accommodated in the recess 18. A hole 19 is provided so as to be connected to the hole 21, and a gas introduction part of the gas sensor 4 is inserted into the hole 19. In the embodiment, the center of the hole 19 is higher than the center of the hole 21, and the recess 22 extends from the bottom of the attachment 10 to the connection part of the holes 19 and 21.

  The recess 18 is connected to the hole 20, and the recess 22 is connected to the hole 21. Since the attachment 10 is made of an elastic body, the attachment 10 is compressed by the upper case 16 and the substrate 12 and prevents exhalation from escaping between the recesses 18 and 22 and the substrate 12. In order to prevent leakage of breath more completely, a ring-shaped protrusion 24 is preferably provided around the recesses 18 and 22 at the bottom of the attachment 10. The protrusion 24 may not be provided.

  In the embodiment, the two holes 20 and 21 and the two recesses 18 and 22 are provided. However, these holes may be integrated to form one hole and one recess. The recess 22 is provided because the center 21 is different in height between the hole 21 and the hole 19, and the recess 22 may not be provided.

  The attachment 10 is sandwiched between the substrate 12 and the upper case 16, and is pressurized in the vertical direction in FIG. Therefore, the gap between the recesses 18 and 22 and the substrate 12 is kept airtight, and in the embodiment, the ring-shaped protrusion 24 is deformed by pressure, so that the airtightness is further increased.

  The operation of the embodiment will be described. When exhalation flows through the pipe 8, the pressure in the recess 18 connected to the hole 20 decreases, and the pressure sensor 6 detects that exhalation has been blown. When an airflow sensor is used instead of the pressure sensor 6, an outlet from the recess 18 to the gas sensor 4 side, for example, is provided to form an exhalation flow around the airflow sensor.

  The exhaled air introduced from the hole 21 is sucked into the gas sensor 4 through the hole 19, and an exhaled component such as alcohol, acetone, acetaldehyde or the like is detected.

  In the embodiment, it is not necessary to connect the pipe 8 to the gas sensor 4 and the pressure sensor 6 with an auxiliary pipe. Then, the attachment 10 is pushed by the substrate 12 and the upper case 16, and the recesses 18 and 22 are brought into close contact with the substrate 12. When the projection 17 of the attachment 10 made of an elastic body is inserted into the pipe 8, the space between the pipe 8 and the projection 17 is also kept airtight.

  FIG. 7 shows a configuration of the exhalation detection device 2, and a computer 30 such as a microcomputer detects that exhalation has been blown in accordance with a signal from the pressure sensor 6, and operates the pump 5. Next, the gas sensor 4 detects alcohol, acetone, acetaldehyde, etc. in the breath, and the computer 30 converts the signal of the gas sensor 4 into a concentration of alcohol, etc., displays it on the display unit 31, and outputs it from the communication unit 32 to the outside.

  FIG. 8 shows the attachment 40 of the second embodiment, wherein the projection 44 is provided with one hole 45 and one recess 46 communicating with the hole 45. Note that the opening of the recess 46 (opening on the substrate 12 side) is surrounded by a ring-shaped protrusion, as in FIGS. A gas sensor 42 is accommodated in the recess 45, and the gas sensor 42 introduces exhaled air by natural diffusion from the gas introduction hole 43, and the pump 5 is not provided. Further, the inhalation of breath is detected by the time change of the signal of the gas sensor 42, and the insufflation detection sensor is not provided.

  In the embodiment of FIG. 8, the gas sensor 42 is housed in the attachment 40, the two holes 20, 21 are integrated into one hole 45, and the two recesses 18, 22 are integrated into one recess 46. . The other points are the same as those of the embodiment of FIGS. 1 to 7, and the same reference numerals denote the same parts. In the embodiment of FIG. 8 as well, leakage of exhalation from the edge of the recess 46 can be prevented, and an auxiliary pipe for connecting the gas sensor 42 and the pipe 8 becomes unnecessary.

  FIG. 9 shows an attachment 50 according to a modified example, and the projection 52 is provided with two holes 20 and 21 as in the embodiment. Unlike the embodiment, the hole 21 penetrates to the gas sensor 56 side opposite to the pipe 8, the projection 54 is inserted into the gas introduction hole of the gas sensor 56, and the hole 21 continues to the tip of the projection 54. The other points are the same as those in the embodiment of FIGS.

2 Breath detection device
4 Gas sensor
5 Pump
6 Pressure sensor (Blow-in detection sensor)
8 pipes
10 Attachment
12 Board
14 Lower case
15 protrusion
16 Upper case
17 Protrusions
18,22 recess
19 holes
20,21 holes
24 protrusions
30 computers
31 Display
32 Communications department
40 Attachment
42 Gas sensor
43 Gas introduction hole
44 protrusion
45 holes
46 Recess
50 attachments
52 protrusion
54 protrusion
56 Gas sensor

Claims (3)

In an exhalation detection device in which a substrate on which a gas sensor and an inhalation detection sensor are mounted and a pipe that becomes an exhalation flow path are housed in a housing,
A projection provided with an exhalation-introducing hole, inserted into the pipe, a recess that opens to the substrate side to accommodate the blowing detection sensor and communicates with the hole, and a flow path between the hole and the gas sensor , And an attachment made of an elastic body is provided,
The breath detection apparatus, wherein the attachment is compressed by being pressed by the housing and the substrate, and the space between the attachment and the substrate is hermetically sealed. In an exhalation detection device in which a substrate on which a gas sensor is mounted and a pipe serving as an exhalation flow path are housed in a housing,
Protrusions provided with holes for introducing breath, inserted into the pipe, provided with recesses that open to the substrate side, accommodate the gas sensor and communicate with the holes, and are made of an elastic body,
The breath detection apparatus, wherein the attachment is compressed by being pressed by the housing and the substrate, and the space between the attachment and the substrate is hermetically sealed.   The breath detection device according to claim 1 or 2, wherein the attachment includes a ring-shaped protrusion surrounding the opening of the recess.

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