JP6587399B2 - Gas alarm - Google Patents

Description

  The present invention includes a gas detection element having a gas sensing unit provided so as to be in contact with a gas to be detected, a power supply unit that applies a predetermined voltage to the gas detection element, and an alarm in response to a signal from the gas detection element. It is related with the gas alarm which equipped the inside of a case with the alarming part which emits.

  Patent Document 1 describes a portable gas alarm device in which sound emission holes for emitting an alarm sound are formed on the front surface and the upper surface of a housing. By providing a plurality of sound emitting holes in this manner, it has been said that a larger alarm sound can be emitted to the outside of the housing.

Japanese Patent No. 5059632

  As a portable gas alarm device, one that can detect gas in a state where it is worn on an inspector's clothes or the like has been known. In this case, a mounting member such as a clip or a pin is provided in the casing of the gas alarm device, and it can be carried by being attached to the clothing by the mounting member.

  When such a gas alarm device is mounted, for example, near a chest pocket of clothes, the gas alarm device may be mounted in a posture inclined forward due to its own weight. At this time, the upper surface of the housing is facing obliquely forward as viewed from the inspector, and when the sound emission hole is formed on the upper surface of the housing as in the gas alarm device of Patent Document 1, the sound emission hole is A warning sound is emitted diagonally forward. For this reason, this alarm sound was smaller than that emitted to the inspector, and the inspector was considered difficult to hear.

  Accordingly, an object of the present invention is to provide a gas alarm device that can easily hear an alarm sound even when it is worn on clothes or the like.

Gas detector according to the present invention for achieving the above object, a power supply unit for applying a gas sensing element having a gas sensing portion mounted for contact with the gas to be detected, a predetermined voltage to the gas sensing element A gas alarm device having a notification unit that generates a warning in response to a signal from the gas detection element, the first feature of the gas alarm device being located above the casing is the notification unit An upper surface sound emitting hole that emits an alarm sound from the upper surface is formed, and the upper surface sound emitting hole is formed at a predetermined angle with respect to the rear surface of the housing. The upper surface sound emitting hole is provided at an angle that opens toward the inspector in the mounting posture .

When the gas alarm is mounted near the chest pocket of the clothes, the gas alarm may be mounted in a posture inclined forward due to its own weight. At this time, the upper surface of the housing facing obliquely forward as viewed from the checker, the upper surface sound hole in this configuration, Ri tare formed at an angle to the back of the housing, the top sound The hole is provided on the upper surface of the casing when the inspector is in the mounting posture with the gas alarm device mounted, and the upper surface sound emitting hole is opened at an angle toward the inspector in the mounting posture. . Therefore, the alarm sound emitted from the upper surface sound emission hole is easier to hear for the inspector than, for example, the alarm sound emitted obliquely forward of the inspector.

  The second characteristic configuration of the gas alarm device according to the present invention is that the angle of the upper surface sound emitting hole can be adjusted.

  According to this configuration, the inspector can change the angle of the upper surface sound emitting hole to a desired angle at a desired timing, and the inspector can further reproduce the alarm sound emitted from the upper surface sound emitting hole. It becomes easy to hear.

  The 3rd characteristic structure of the gas alarm device which concerns on this invention exists in the point which formed the front sound emission hole from the said alerting | reporting part in the front position of the said housing | casing corresponding to the said alerting | reporting part.

  According to this configuration, since the alarm sound from the notification unit can be emitted from both the upper surface sound emission hole and the front sound emission hole, it is easier for the inspector to hear a larger alarm sound outside the housing. In addition, it is possible to make it easier to hear surrounding workers.

It is the schematic of the gas alarm device of this invention. It is the schematic of the back view of a gas alarm device. It is a disassembled perspective view of a gas alarm device. It is the schematic of a front side housing | casing. It is the schematic of a back side housing | casing. It is a side view schematic diagram of a gas alarm. It is the schematic which deform | transformed the connection terminal when removing a power supply cover member from a housing | casing. It is the schematic of the mounting posture which mounted | wore the inspector's clothes with the gas alarm device.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 5, the gas alarm device X of the present invention obtains an output from the gas detection element 1 having a gas sensitive portion provided so as to be in contact with the gas to be detected, and the gas detection element 1. The output detection unit 2, the determination unit 3 that determines the concentration level of the gas to be detected based on the value obtained by the output detection unit 2, and the gas sampling unit 4 that collects the detection gas from the inspection target that is a gas detection target With. In addition, the gas alarm device X includes a power supply unit 10 that applies a predetermined voltage to the gas detection element 1. The power supply unit 10 can obtain an output from the gas detection element 1 when a predetermined voltage is applied to the gas detection element 1 in contact with the gas to be detected.

  The gas detection element 1, the output detection unit 2, the determination unit 3, and the power supply unit 10 described above are housed in the housing Y of the gas alarm device X. The gas alarm device X of the present embodiment is an aspect of a portable gas alarm device that can perform gas detection in a state where the gas alarm device X is worn on an inspector's clothes and the like. Although the case where it comprises integrally is demonstrated, it is not limited to this aspect.

  The front housing Y1 is a front housing with the gas alarm X attached to the inspector's clothing, etc., and the back housing Y2 is attached to the inspector's side with the clothing etc. It is the housing which becomes.

  The rear casing Y2 includes a control unit 6 that controls operations of the gas detection element 1, the output detection unit 2, the determination unit 3, the switch 5, and the gas alarm device X as components housed in the casing Y. In addition, electronic parts such as a notification unit 7 that issues an alarm and a circuit board 8 are accommodated, and a power supply unit 10 is further provided. On the surface on the side of the inspector of the back side housing Y2, a mounting member 30 to be mounted on the clothes of the inspector is provided. The mounting member 30 may be in a mode such as a clip or a pin that is mounted on clothing or a band that is mounted on the wrist or the like of an inspector. It is not limited.

  A gas inlet 21 is formed at a position corresponding to the gas sampling unit 4 and a switch hole 22 is formed at a position corresponding to the switch 5 in the front case Y1, and a front side of the case corresponding to the notification unit 7 is formed. A front sound emitting hole 23 for emitting an alarm sound from the notification unit 7 is formed at the position. The front sound emitting hole 23 communicates with the notification unit 7 through the acoustic chamber 9 having an acoustic space (FIG. 6). Moreover, the alerting | reporting part 7 may be what kind of aspect as long as it receives the signal from the gas detection element 1, and issues a warning, For example, a piezoelectric speaker etc. can be used. In the present embodiment, an upper surface sound emitting hole 26 (described later) provided above the housing Y is provided in addition to the front sound emitting hole 23 as a sound emitting hole that emits an alarm from the notification unit 7.

  A sealing member 40 is attached to the surface of the front case Y1. The sealing member 40 is formed with openings 40a, 40b, and 40c corresponding to the gas introduction port 21, the switch hole 22, and the recess 24 (described later), respectively.

(Front sound emission hole)
A concave portion 24 is provided at the periphery of the front sound emitting hole 23, and a plurality of ribs 25 that are not connected to the sound emitting wall portion 23 a forming the front sound emitting hole 23 are provided in the concave portion 24. The rib supports the sealing member 40 whose front surface of the recess 24 is opened by the opening 40 c and whose front surface of the front sound emitting hole 23 is not opened.

  In the present embodiment, the recessed portion 24 is formed as an annular recessed portion so as to surround the front sound emitting hole 23, but is not limited to such a mode, and at least a part of the periphery of the front sound emitting hole 23. It suffices if the recess 24 is formed in this area. Moreover, although the four ribs 25 in this embodiment are provided, the number of the ribs 25 is not specifically limited.

  Further, four openings 40c in the present embodiment are provided. The sound emitting wall portion 23 a that forms the front sound emitting hole 23 is configured not to contact the sealing member 40. Therefore, the alarm sound from the notification unit 7 can be emitted from the opening 40c. Furthermore, since the opening 40c does not open the front surface of the front sound emitting hole 23, it is possible to prevent water from directly entering the front sound emitting hole 23 from the opening 40c.

  The plurality of ribs 25 are preferably arranged radially with the front sound emitting hole 23 as the center.

  Further, a waterproof sheet 41 that prevents water from entering the inside of the housing Y from the front sound emitting hole 23 is provided on the back surface of the front housing Y1. Even if water enters from the front sound emission hole 23, the waterproof sheet 41 prevents the notification unit 7 from being exposed to water, and further prevents water from entering the inside of the housing Y. be able to.

  The power supply unit 10 is formed with a battery housing structure 12 in which a battery 11 such as a dry battery or a rechargeable battery is mounted. In the battery housing structure 12, a holding portion 12 b that holds the battery 11 is formed in a battery housing space 12 a that houses the battery 11. Is provided. The power cover member 12d is separate from the housing Y, and is configured to be attachable to the back housing Y2.

  As the battery 11, any known battery can be used, such as an alkaline battery as a dry battery and a Ni—Cd rechargeable battery as a rechargeable battery. Both batteries 11 can use known single, single, single, single, or quadruple shape batteries. The rechargeable battery may be a so-called pack-type rechargeable battery having a rectangular shape in a top view, for example, instead of using a plurality of AAA rechargeable batteries.

  In addition, a long-life backup battery and a main power battery that are normally used are provided as power sources, and power is supplied from the main power battery and the voltage of the power supplied from the main power battery is below a certain level. Sometimes it can be configured to switch to supply power from the backup battery. In the present embodiment, a case will be described in which a dry battery such as the alkaline battery described above is used as the main power supply battery (battery 11) and a lithium battery 13 is used as the backup battery.

(Power cover member)
The power cover member 12d is configured such that at least a part of the components housed in the housing Y is deformed when the power cover member 12d is detached from the housing Y (rear housing Y2). The component may be any component as long as it is a component inside the housing Y, and is not particularly limited.

  The operation of removing the power cover member 12d from the housing Y is normally performed when the battery 11 is replaced. In consideration of the life of the gas detection element 1 and the life of the battery 11, the portable gas alarm device X may have a usage mode in which the gas detection element 1 is also replaced at the same time when the battery 11 is replaced. In this case, if the inspector only replaces the battery 11 and continues to use the device, the gas detection element 1 may be used beyond its lifetime, and normal gas detection may not be performed. In order to avoid such a situation, for example, it is preferable that the manufacturer collects the portable gas alarm device X and replaces the gas detection element 1 and the battery 11 at the manufacturer side at the same time. However, if the inspector mistakenly replaces only the battery 11, if the gas alarm device X cannot be reused at any stage of the replacement work, the gas detection element 1 will exceed its life. Can be prevented beforehand. Therefore, in the present invention, when the power cover member 12d is detached from the housing Y, at least a part of the components housed in the housing Y is configured to be deformed.

  Here, “deformation” in the present specification means that, unlike a state in which a part is incorporated, it is not possible to immediately return to the state in which the part was incorporated. Specifically, “deformation” means that the shape of a part changes irreversibly, or the part is separated into a plurality of pieces and destroyed, but is not limited thereto.

  The part to be deformed can be, for example, a connection terminal 12c that comes into contact with a battery housed in the power supply unit 10.

  In this case, for example, the power cover member 12d and the connection terminal 12c may be connected by the connection member 12e, and the connection terminal 12c may be deformed when the power cover member 12d is detached from the housing Y (FIG. 7).

  Moreover, the said deformation | transformation shall extend the coil which is the connection terminal 12c.

  Moreover, the said deformation | transformation shall make the coil which is the connection terminal 12c detach | leave from the circuit board 8 in which the said coil is arrange | positioned.

(Control part)
The control unit 6 controls the operation of the gas alarm device X. In this embodiment, when performing the inspection mode in which the voltage of the power supply unit 10 is detected every predetermined time, the difference between the voltage at the time of replacement of the battery 11 in the power supply unit 10 and the voltage at the time of inspection becomes a predetermined value or more. In this case, a description will be given of a case where control is performed so as not to shift to a monitoring mode in which an operation for detecting a normal gas to be detected is performed.

The inspection mode is a mode for determining whether or not the gas alarm device X can be normally used. The service life of the power supply unit 10 (battery 11) is detected by detecting the voltage of the power supply unit 10 every predetermined time or at a desired timing. Check it out. At this time, the lifetime of the power supply unit 10 is determined by calculating the difference between the voltage when the battery 11 is replaced in the power supply unit 10 and the voltage during inspection. The monitoring mode is a mode for performing normal gas detection.
Regarding the determination of the life of the power supply unit 10, in addition to the above-described aspect, control may be performed so as not to shift to the monitoring mode when the difference between the voltage measured last time and the voltage measured this time is a predetermined value or more. In this case, it is preferable that the first inspection is performed immediately after the battery 11 is mounted.

  In order to perform control so as not to shift to the monitoring mode, specifically, when the control unit 6 detects the difference, each component (gas detection element 1, output detection) is detected by a reset IC for preventing malfunction during low voltage. The operation of the unit 2, the determination unit 3, etc. may be stopped.

  The control unit 6 is configured to measure a timer counter when a predetermined event occurs. The timer counter can be performed by a counter circuit or the like.

  The predetermined event may be, for example, when the battery 11 is attached or when a reset button is pressed, but is not limited thereto.

  The control unit 6 performs control so as not to shift to the monitoring mode when the timer counter reaches a predetermined value.

(Top sound emission hole)
As described above, the upper surface sound emitting hole 26 provided above the housing Y is configured to be connected to the notification unit via the acoustic chamber 9 having the acoustic space to emit an alarm sound. The upper surface sound emitting hole 26 is formed at a predetermined angle with respect to the rear surface B of the housing Y (FIG. 6). In the present embodiment, the case where the upper surface sound emitting hole 26 is formed in the back housing Y2 will be described, but the present invention is not limited to this.

  In this aspect, the upper surface sound emitting hole 26 is provided on the side surface Ya on the upper surface of the back side housing Y2 when it is mounted on the inspector's clothes (FIG. 8). The rear surface B of the housing Y is a surface on the inspector side. In order to form the upper surface sound emitting hole 26 at a predetermined angle with respect to the back surface B, for example, the direction in which the upper surface sound emitting hole 26 faces and the extended surface of the back surface B intersect with each other at an acute angle (α). . This angle α can be appropriately set as long as the upper surface sound emitting hole 26 is an angle (within an acute angle range) that opens toward the inspector.

  When the gas alarm device X is mounted near the chest pocket of the clothes, the gas alarm device X may be mounted in a posture inclined forward due to its own weight. At this time, the upper surface (side surface Ya) of the housing faces obliquely forward as viewed from the inspector, but the upper surface sound emitting hole 26 is formed at a predetermined angle with respect to the rear surface B of the housing Y. When the gas alarm device X is mounted, the upper surface sound emitting hole 26 can be configured to open toward the inspector. Therefore, the alarm sound emitted from the upper surface sound emitting hole 26 is easier to hear for the inspector than the alarm sound emitted toward the front of the inspector, for example.

  The angle of the upper surface sound emitting hole 26 can be configured to be adjustable. At this time, the angle adjustment can be performed by an angle adjustment mechanism such as an angle adjustment hinge.

  With this configuration, the angle of the upper surface sound emitting hole 26 can be changed to a desired angle by the inspector at a desired timing, and the inspector can further reproduce the alarm sound emitted from the upper surface sound emitting hole 26. It becomes easy to hear.

  The present invention includes a gas detection element having a gas sensing unit provided so as to be in contact with a gas to be detected, a power supply unit that applies a predetermined voltage to the gas detection element, and an alarm in response to a signal from the gas detection element. It can utilize for the gas alarm which equipped the inside of a housing | casing with the alerting | reporting part which emits.

X Gas alarm Y Case B Rear surface 1 Gas detection element 7 Notification unit 10 Power source unit 23 Front sound emitting hole 26 Upper surface sound emitting hole

Claims (3)

A gas sensing element having a gas sensing portion mounted for contact with the gas to be detected, and a power supply unit for applying a predetermined voltage to the gas sensing element, the notification unit for issuing an alarm in response to a signal from the gas sensing element And a gas alarm provided inside the housing,
Above the housing, the upper surface sound emission hole for emitting the warning sound from the notification portion is provided, the top surface sound hole, Ri tare formed at an angle relative to the back of the housing,
The upper surface sound emitting hole is provided on the upper surface of the housing when the inspector is in a mounting posture in which the gas alarm is mounted,
Said top surface sound hole, gas detector you open at an angle towards the checker at the mounting position.   The gas alarm device according to claim 1, wherein an angle of the upper surface sound emitting hole is adjustable.   The gas alarm device according to claim 1 or 2, wherein a front sound emitting hole from the notification unit is formed at a position in front of the casing corresponding to the notification unit.

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