JP6621461B2 - Alarm - Google Patents

Description

  The present invention relates to an alarm device including a detection unit including a sensor that detects a change in an external environment, and a sound emission unit that generates a sound alarm through an opening formed in a housing.

  Conventionally, this type of alarm device has a sensor as a detection unit that detects temperature rise and gas to be detected, and a sound emission unit that notifies the change of the external environment detected by the sensor with an alarm sound such as sound It has been known. Since a technique for notifying a change in the external environment with an alarm sound or the like in an alarm device is common, patent literature is not described.

  The sound emitting unit described above normally notifies the user of changes in the external environment by emitting sound from an opening formed in the housing of the alarm device. As the sound emitting unit, for example, a unit that generates sound by vibrating a piezoelectric diaphragm is known.

  In this case, if the alarm is used in a high temperature environment, the piezoelectric diaphragm is exposed to a high temperature through the opening due to radiant heat, and if the alarm is used in an environment such as rain, the piezoelectric diaphragm is exposed through the opening. If exposed to water, the performance of the piezoelectric diaphragm may be affected in any case.

  Therefore, the objective of this invention is providing the alarm device provided with the sound emission part which is hard to receive to the influence of an external environment.

In order to achieve the above object, an alarm device according to the present invention includes a detection unit that includes a sensor that detects a change in the external environment, and a sound emission unit that issues a sound alarm through an opening formed in the housing. a alarm device, its first feature structure is mounted to the housing so as to cover the opening, comprising a plurality formed was sounded Bufuta member slit you want to release the sound from the opening, The slits are arranged in a circular shape centered on the opening .

  As in this configuration, by providing the sound emitting part lid member attached to the housing so as to cover the opening, it is possible to prevent the opening from being directly exposed to the outside, and thereby the sound emitting part can be prevented from being exposed through the opening. Since it is possible to prevent the internal structure from being directly exposed to the outside, the sound emission part is hardly affected by the external environment. Therefore, it is possible to prevent the performance of the sound emitting unit from changing due to the influence of the external environment.

Further, sound emission Bufuta member by forming a slit bets, since it is possible to release the sound from the sound emitting portion, even when fitted with a sound emitting Bufuta member so as to cover the opening, the sound emitting part Can be reliably emitted to the outside of the alarm device.
In this configuration, since each slit can be disposed at an equal distance from the opening, the sound (volume) emitted from each slit can be made equal.

A second characteristic configuration of the alarm device according to the present invention is that the slit has an arc shape.

According to this configuration, by arranging a plurality of arc-shaped slits in a circular shape, each of the slits can be disposed so that the opening is located at the center of the circle.

The third characteristic configuration of the alarm device according to the present invention, the opening and the slit DOO is that not formed face each other.

According to this configuration, for example, slit DOO or we invading heat, water is less likely to penetrate the linearly directly opening. Therefore, even if the alarm device is used in a high temperature environment, the internal structure of the sound emitting unit is not directly exposed to high temperatures due to radiant heat, and even if the alarm device is used in an environment such as rain, Since the internal structure is difficult to be directly exposed to water, it is more difficult to be affected by the external environment.

A fourth characteristic configuration of the alarm device according to the present invention is provided with a lid member side projection on the back surface of the sound emitting unit lid member, and a housing side projection that does not face the lid member side projection on the surface of the housing. It is in.

According to this configuration, the lid member side protrusion and the housing side protrusion can define the shape of the space. Since the space has such a shape, the sound emitted from the sound emitting unit resonates in the space, and the volume and sound quality can be changed. Therefore, by changing various shapes of the lid member side protrusion and the housing side protrusion, it is possible to emit sounds of various volumes.

It is an upper surface perspective view which shows the alarm device of this invention. It is a bottom perspective view showing an alarm device of the present invention. It is a disassembled perspective view which shows the alarm device of this invention. It is an exploded view of a detection part. It is an exploded view of a battery accommodating part. It is principal part sectional drawing of an alarm device.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The alarm device of the present invention detects a change in the external environment such as a change in the concentration of the gas to be detected and notifies the user of the change.

  As shown in FIGS. 1 to 6, the alarm device X according to the present invention is a sound alarm through a detection unit 20 having a sensor 21 that detects a change in the external environment and an opening 11 formed in the housing 10. And a sound emitting part lid member 40 that is attached to the housing 10 so as to cover the opening 11 and that forms a slit 41 that releases sound from the opening 11.

  The alarm device X may be any device as long as it is portable. For example, the alarm device X can be configured to be worn on a helmet or clothes. In the present embodiment, a portable alarm device in which a mounting connecting portion 50 is formed, which is a U-shaped clip member formed by folding an elastic metal plate through a curved portion so that it can be mounted on a helmet or the like. Will be described. In the alarm device of the present embodiment, a case where the driving power source is the dry battery 61 housed in the battery housing part 60 will be described.

(Detector)
The alarm device X includes a detection unit 20 that detects a change in the external environment. The detection unit 20 includes a sensor 21 that detects a change in the external environment. As such a sensor 21, a gas sensor such as an oxygen sensor or a CO sensor can be used, but is not limited thereto.

The gas sensor may be in any form as long as it detects the gas to be detected. For example, a known constant potential electrolytic gas sensor can be used as long as the oxygen sensor can detect oxygen gas and the CO sensor can detect carbon monoxide gas generated by incomplete combustion.
This embodiment demonstrates the case where the CO sensor 21 which detects carbon monoxide gas as a to-be-detected gas is provided in the factory etc.

  The detection unit 20 of the present embodiment is configured such that the cylindrical CO sensor 21, the Teflon sheet 23, and the packing 24 are covered with a cylindrical sensor cover 22 in the detection unit storage unit 12 in the housing 10 ( FIG. 4). The sensor cover 22 has an insertion hole 22a so that the gas to be detected can be inserted. The CO sensor 21 is attached to the detection unit accommodating portion 12 via the substrate member 26. Around the substrate member 26, a pair of wing portions 26A is formed. A pair of recesses (not shown) corresponding to the shape of the wing portion 26 </ b> A is formed on the back side of the detection portion housing portion 12, and the wing portion 26 </ b> A is attached when the substrate member 26 is attached to the detection portion housing portion 12. And fit the recess. Since the pair of wings 26A are arranged so as not to be positioned in the diametrical direction, the orientation of the substrate member 26 can be easily determined when the wings 26A and the recesses are fitted. The member 26 can be easily attached to the detection unit accommodating portion 12.

  Further, a seal ring 25 is disposed on the outer periphery of the sensor cover 22, and a pair of operation protrusions 22 b and a mounting groove 22 c that are rotated when the sensor cover 22 is attached and detached are formed. The pair of operation protrusions 22 b are disposed at positions facing each other on the diameter of the sensor cover 22. The mounting groove 22c engages with the protrusion 17 provided on the back surface of the housing 10 in the detector housing portion 12 (FIG. 4). The mounting groove 22c is configured to guide the protrusion 17 in the circumferential direction after guiding the protrusion 17 in the axial direction of the sensor cover 22. By gripping the operation protrusion 22b and rotating the sensor cover 22, the sensor cover 22 can be displaced to either the mounting position or the detachable position.

  Thus, by covering the CO sensor 21 with the sensor cover 22 and exposing the pair of operation protrusions 22b to the outside of the housing 10, the sensor cover 22 can be detached by rotating the sensor cover 22 when replacing the sensor. In this state, the sensor may be detached after only the sensor cover 22 is slid in the separating direction to be detached. That is, since it is not necessary to open the housing 10 and remove the sensor, the sensor can be easily replaced.

  In the present embodiment, the housing 10 is composed of two separable members (upper member and lower member). For example, water or the like enters the inside of the housing 10 around the lower member. You may provide the sealing member 80 which can prevent doing. The seal member 80 is disposed along the periphery of the lower member, but is configured to bend so as to follow the curved surface shape of the detection unit storage unit 12 at a portion where the detection unit storage unit 12 is located. Good. The seal member 80 may be formed of, for example, a thermoplastic resin, but is not limited thereto.

(Sound emission part)
The sound emitting unit 30 receives an alarm signal from the calculation means when the calculation means (not shown) described later determines that each sensor has continuously detected a CO concentration equal to or higher than the alarm level, for example. To emit.

  In the present embodiment, a piezoelectric diaphragm 31 is disposed in the sound emitting unit 30, and a sound is generated by vibrating the piezoelectric diaphragm 31, and the sound is output as an alarm through the opening 11 formed in the housing 10. The case where it originates in will be described. The piezoelectric diaphragm 31 may be a known piezoelectric diaphragm provided that a piezoelectric element (for example, a piezoelectric ceramic thin plate) polarized in the thickness direction is bonded to a metal plate and flexural vibration of the diaphragm is used as a sound source. Can be used. The piezoelectric element has a property that it contracts when a voltage in the same direction as the polarization direction is applied and expands when a voltage in the opposite direction is applied, and when the expansion / contraction change of the piezoelectric element is transmitted to the metal plate, the fixed metal plate Causes a bending phenomenon and generates sound waves.

  The piezoelectric diaphragm 31 of the present embodiment is a circular thin film, and its periphery is attached to a circular support portion 13 formed on the back surface of the housing 10 with an adhesive so that parts other than the periphery can vibrate. It is arranged (FIG. 6).

(Sound emission cover member)
The sound emitting part lid member 40 is attached to the housing 10 so as to cover the opening 11, and forms a slit part 41 that releases sound from the sound emitting part 30.

  In the present embodiment, the slit portion 41 shows a case where six arc-shaped slits are arranged in a circular shape, but the shape, arrangement mode and number of installations of the slits are not limited to this mode. . The slit portion 41 emits an alarm sound emitted from the opening 11 to the outside.

  In the present embodiment, six arc-shaped slits are arranged in a circular shape, and each is arranged so that the opening 11 is positioned at the center of the circle. In this configuration, since each slit can be disposed at an equal distance from the opening 11, the sound (volume) emitted from each slit can be made equal.

The sound emitting unit lid member 40 is mounted so as to form a space S between the housing 10 (FIG. 6). The space S may be configured to resonate when the sound emitted from the sound emitting unit 30 reaches the space S through the opening 11. In the present embodiment, a circular protrusion (cover member side protrusion) 45 is formed on the back surface of the sound emitting part lid member 40, and the sound emitting part 30 has a circular shape that does not face the cover member side protrusion 45 on the surface of the housing 10. A protrusion (housing side protrusion) 16 is formed, and the housing side protrusion 16 and the lid member side protrusion 45 define the shape of the space S. When the space S has such a shape, the sound emitted from the sound emitting unit 30 resonates in the space S, and the volume and sound quality can be changed. Therefore, by changing the shapes of the housing-side protrusion 16 and the lid member-side protrusion 45 in various ways, it is possible to emit various sound volumes.

  Further, in the space S, for example, a sound pressure adjusting member may be installed at the periphery of the space defined by the protrusions 16 and 45 (a space facing the slit portion 41). Since the peripheral space is filled by providing the sound pressure adjusting member, the sound pressure can be changed. Thus, since the space in which the sound pressure adjusting member is provided is formed, for example, the sound pressure can be suppressed according to the request of the site where the alarm device X is used. The sound pressure adjusting member is not limited as long as it is a member that can be fitted into the peripheral space and change the sound pressure. For example, a washer-like rubber plate can be used. Also, the sound quality and volume can be similarly changed by attaching a seal member to the slit portion 41.

  A plurality of these protrusions 16 and 45 can be provided. In this embodiment, the circular protrusion 16 is configured to be a triple circle. Since the circular protrusion 16 is formed around the opening 11, it is possible to prevent water, dust, or the like that has entered through the slit 41 from entering the inside of the housing 10 from the opening 11.

Moreover, the opening part 11 and the slit part 41 (slit) are not formed facing each other. In this configuration, for example, heat, water, or the like that has entered from the slit portion 41 does not easily enter the opening portion 11 linearly. Therefore, even if the alarm device X is used in a high temperature environment, the piezoelectric diaphragm 31 is not directly exposed to high temperature due to radiant heat, and even if the alarm device X is used in an environment such as rain, the piezoelectric diaphragm 31 is not used. Are not directly exposed to water, making them less susceptible to external influences.

  Further, a drain hole 42 for draining water accumulated in the sound emitting unit 30 is formed in the sound emitting unit lid member 40 below the alarm X when the alarm device X is installed. In this configuration, even if water enters the sound emitting part 30 from the slit part 41 of the sound emitting part cover member 40, the water can be discharged to the outside through the water drain hole 42.

  The sound emitting unit lid member 40 includes an insertion protrusion 43 that is slidably engaged with the housing 10 and a fitting claw portion 44 that is fitted to the housing 10.

  The insertion protrusion 43 is formed so as to protrude on the same plane as the base 40 a from the periphery of the base 40 a of the circular sound emitting part lid member 40, and is slid and moved toward the recess 14 provided in the housing 10. Thus, the insertion protrusion 43 and the recess 14 are fitted (FIG. 6). The fitting claw portion 44 is formed so as to protrude from the inner surface of the sound emitting portion lid member 40 substantially perpendicularly to the base body 40 a and is fitted to the engaging portion 15 provided in the housing 10. Match. The insertion protrusion 43 and the fitting claw 44 in the present embodiment are disposed on the diameter of the circular sound emitting part lid member 40.

  Thus, since the sound emission part cover member 40 is provided with the insertion protrusion part 43 and the fitting nail | claw part 44, in order to mount the sound emission part cover member 40 with respect to the housing | casing 10 in two places, the sound emission part cover The member 40 can be securely attached to the housing 10. Moreover, since the sound emission part cover member 40 is provided with the insertion projection part 43 and the fitting nail | claw part 44, the sound emission part cover member 40 is not fixed to the housing | casing 10, but it can be made removable. Therefore, the sound emission part 30 can be easily cleaned by removing the sound emission part lid member 40.

  In addition, for example, since it is possible to easily replace the sound emitting part cover members 40 having different slit shapes, arrangement modes, and number of installations, it is possible to easily change the volume and quality of the sound from the sound emitting part 30. Can do.

(Calculation means)
The calculation means includes a concentration calculation unit (not shown) that calculates the CO concentration based on the output of the above-described CO sensor 21 that detects carbon monoxide gas. Further, when the CO sensor 21 continuously detects the CO concentration equal to or higher than the alarm level, the calculation means controls to send an alarm signal to the sound emitting unit 30 and to issue an alarm by the sound emitting unit 30.
The alarm device X of the present invention is provided with a display unit 70 for displaying the result of the calculation means on the housing 10 so that the CO concentration and the like can be displayed.

(Battery compartment)
The battery accommodating unit 60 accommodates a dry battery 61 that is a driving power source for the alarm device X (FIG. 5). The battery housing part 60 is a cylindrical housing space that houses a cylindrical dry battery 61. The dry battery 61 is slid and accommodated with respect to the battery accommodating part 60, and the battery accommodating part 60 is closed by the battery accommodating part cover member 62 in this state. The battery housing portion lid member 62 of the present embodiment includes a gripping portion 62a and a mounting groove 62b that are formed with irregularities around the periphery, and by gripping the gripping portion 62a and rotating the battery housing portion lid member 62, Mounted on the battery housing 60. That is, in this configuration, it is not necessary to open the housing 10 and insert / remove the dry battery 61, so that the battery can be easily replaced.

  By providing the sound emitting part cover member 40 attached to the housing 10 so as to cover the opening 11 as in the present invention, it is possible to prevent the opening 11 from being directly exposed to the outside, and thereby the sound emitting part 30. The piezoelectric diaphragm 31 can be prevented from being directly exposed to the outside, so that the sound emitting part 30 is hardly affected by the external environment, and the performance of the sound emitting part 30 is prevented from changing due to the external environment. it can.

  INDUSTRIAL APPLICABILITY The present invention can be used for an alarm device that includes a detection unit that includes a sensor that detects a change in the external environment and a sound emission unit that issues a sound alarm through an opening formed in the housing.

X alarm device 10 housing 11 opening 20 detection unit 21 sensor 30 sound emitting unit 40 sound emitting unit lid member 41 slit unit 42 drain hole 43 insertion projection unit 44 fitting claw unit

Claims (4)

An alarm device comprising a detection unit having a sensor for detecting a change in the external environment, and a sound emission unit for alarming with sound through an opening formed in the housing,
A sound emission part lid member that is attached to the housing so as to cover the opening and that has a plurality of slits that release sound from the opening,
Each of the slits is an alarm device arranged in a circular shape centering on the opening . The alarm according to claim 1, wherein the slit has an arc shape . It said opening and said slit TMG, alarm as claimed in claim 1 which is not formed to face each other. The alarm according to any one of claims 1 to 3, further comprising a lid member-side protrusion on a back surface of the sound emitting portion lid member, and a housing-side protrusion that does not face the lid member-side protrusion on the surface of the casing. vessel.

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