JP2015022587A - Alarm - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an alarm which allows a user to replace a sensor quickly and easily.SOLUTION: The alarm having a detection part 20 having a sensor for detecting change of an external environment is provided. The detection part 20 has a sensor cover 22 for covering the sensor, the sensor cover 22 can be displaced to an attachment position and a separable position by rotation operation. When it is positioned on the separable position, an irregularity gripping part 22d formed on a surface of the sensor cover 22 is exposed.

Description

  The present invention relates to an alarm device including a detection unit including a sensor that detects a change in an external environment.

  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.

  In the alarm device described above, when replacing the sensor, the housing is opened to access the sensor. If there is a case where the hand slips and it is difficult to open when opening the case, it takes time to replace the sensor.

  Accordingly, an object of the present invention is to provide an alarm device capable of quickly and easily replacing a sensor.

  An alarm device according to the present invention for achieving the above object is an alarm device including a detection unit including a sensor for detecting a change in an external environment, and the first characteristic configuration thereof is that the detection unit is A sensor cover that covers the sensor is provided, and the sensor cover can be displaced to either a mounting position or a detachable position by a rotation operation, and the uneven gripping portion formed on the surface of the sensor cover at the detachable position Is in the point where it is exposed.

  In this configuration, the sensor cover is removed to access the sensor and replace the sensor. Since the surface of the concavo-convex gripping part is processed to be concavo-convex, it becomes difficult to slide when the operator grips it with a finger (for example, an index finger and a thumb) and slides it in the detaching direction. The concavo-convex gripping portion is exposed only when the sensor cover is rotated to the detachable position. That is, when the sensor cover is in the mounting position, the sensor cover does not need to be removed, so that the uneven gripping portion does not need to be exposed. Therefore, even if the operator tries to remove the sensor cover by mistake, the uneven gripping portion is not exposed, so that the operator can visually recognize that the sensor cover is not in the detachable position.

  In this configuration, when exchanging the sensor, the sensor cover is first removed. At this time, by rotating the sensor cover to the detachable position, the uneven gripping portion can be exposed quickly, and when the sensor cover is being removed, the concave / convex gripping portion is gripped and it is difficult to slip. Can be removed. Therefore, in this configuration, the sensor cover can be removed quickly and easily when the sensor is replaced, so that the sensor replacement operation can be performed quickly and easily.

  A second characteristic configuration of the alarm device according to the present invention is that a seal ring is disposed on an outer periphery of the sensor cover, and the uneven gripping portion is formed outside the seal ring.

  If the concave / convex gripping part that is exposed only when the sensor cover is rotated to reach the detachable position as in this configuration is formed outside the seal ring, the casing is sealed even when the detachable position is reached. The concave and convex gripping portion can be disposed on the sensor cover in a surely performed state.

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 a principal part schematic diagram of a detection part (mounting position). It is a principal part schematic of a detection part (detachable position). It is principal part sectional drawing of a detection part accommodating part.

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 8, the alarm device X of the present invention provides a sound alarm through a detection unit 20 including a sensor 21 that detects a change in the external environment and an opening 11 formed in the housing 10. And the sound unit 30. The detection unit 20 includes a sensor cover 22 that covers the sensor 21, and the sensor cover 22 can be displaced to either a mounting position or a detachable position by a rotation operation. At this time, the uneven gripping portion 22d formed on the surface of the sensor cover 22 is exposed.

  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 an attachment site 18 disposed on the main substrate 19 of the detection unit accommodating portion 12 via a substrate member 26 having a guide member 27. In this embodiment, the CO sensor 21 is mounted on the board member 26 by inserting a plurality (three) of socket pins 21a into the pin insertion holes 26a. 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 (FIGS. 6 and 7).

  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.

  In the alarm device X of the present invention, the concave / convex gripping portion 22d formed on the surface of the sensor cover 22 is exposed at the detachable position.

  That is, when the sensor cover 22 is in the mounting position, the concave and convex gripping portion 22d is covered and not exposed by the housing 10, but the sensor cover 22 is rotated to the detachable position by rotating the operation protrusion 22b. The concave / convex gripping portion 22d is exposed. In the present embodiment, two uneven gripping portions 22 d are provided, and these uneven gripping portions 22 d are arranged at positions facing each other on the diameter of the sensor cover 22. Any of the concave and convex gripping portions 22d is exposed only when the sensor cover 22 is in a detachable position. The exposed concavo-convex gripping portion 22d is processed to be concavo-convex so that it is difficult to slip when the operator grips it with two fingers (for example, an index finger and a thumb), and the sensor cover 22 is gripped with two fingers. Then, the sensor cover 22 can be easily detached by sliding in the removing direction.

  The uneven gripping portion 22d may be formed outside the seal ring 25. The seal ring 25 prevents foreign matter from entering the inside of the housing 10. Therefore, when the concave / convex gripping portion 22d is formed outside the seal ring 25, the concave / convex gripping portion 22d can be disposed on the sensor cover 22 in a state where the casing 10 is securely sealed.

(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 the periphery thereof is attached to a circular support portion formed on the back surface of the housing 10 with an adhesive, and parts other than the periphery are arranged so as to vibrate. It is set up.

(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 between the housing 10 and the sound emitting unit lid member 40. The space may be configured to resonate when the sound emitted from the sound emitting unit 30 reaches the space via the opening 11. In the present embodiment, circular protrusions 45 are formed on the back surface of the sound emitting unit lid member 40, and circular protrusions 16 that are not opposed to the protrusions 45 are formed on the surface of the housing 10 in the sound emitting unit 30. 45 define the shape of the space. When the space has such a shape, the sound emitted from the sound emitting unit 30 resonates in the space, and the volume and sound quality can be changed. Therefore, by changing the shape of the protrusions 16 and 45 in various ways, it is possible to emit sounds with various volumes.

  In addition, a sound pressure adjusting member may be installed in a peripheral edge of the space defined by the protrusions 16 and 45 (a space facing the slit portion 41), for example. 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.

  The sound emitting part lid member 40 is formed with a drain hole 42 for draining water accumulated in the sound emitting part 30 below the alarm X when the alarm device X is installed.

  The sound emitting unit lid member 40 includes an insertion protrusion 43 that is slidably engaged with the housing 10 and a fitting claw 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. As a result, the insertion protrusion 43 and the recess are fitted. 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 40a and is fitted so as to be fitted into an engaging portion provided in the housing 10. To do. 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.

(Calculation means)
The calculation means includes a concentration calculation unit that calculates the CO concentration based on the output of the above-described CO sensor 21 detecting the carbon monoxide gas (not shown). 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. 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 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.

  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 22 sensor cover 22d uneven gripping part 25 seal ring 30 sound emitting part

Claims (2)

An alarm device having a detection unit equipped with a sensor for detecting a change in the external environment,
The detection unit includes a sensor cover that covers the sensor,
The sensor cover is displaceable to either a mounting position or a detachable position by a rotation operation, and an uneven grip formed on a surface of the sensor cover is exposed when the sensor cover is at the detachable position.   The alarm device according to claim 1, wherein a seal ring is disposed on an outer periphery of the sensor cover, and the uneven gripping portion is formed outside the seal ring.

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