JP5869261B2 - Alarm - Google Patents

Description

  The present invention relates to an alarm device, and more particularly to an alarm device that can be carried by a user.

  2. Description of the Related Art Conventionally, an alarm device is known that issues an alarm by detecting a gas to be detected such as gas leakage, fire, or carbon monoxide accompanying incomplete combustion of combustion equipment. As this type of annunciator, for example, a type that can be carried by the user is known in addition to a type that is fixedly disposed in a place such as a room, a bathroom, or a kitchen.

  For example, Patent Document 1 discloses a residential alarm device. This residential alarm device includes a protective cover that is a housing that houses a part including a detection unit, and one opening is formed on the bottom surface of the protective cover. Since this opening functions as a ventilation part, ventilation is performed between the atmosphere around the alarm device and the detection unit. Patent Documents 2 and 3 disclose portable gas detectors. This gas detector includes a rectangular frame-shaped case body that is a housing for housing components including a gas sensor and a circuit board, and one gas introduction portion is formed on the upper surface of the case body. By this gas introduction part functioning as a ventilation part, ventilation is performed between the atmosphere around the detector and the gas sensor.

JP 2010-50031 A JP 2006-209438 A JP 2005-134331 A

  However, according to the method disclosed in each patent document, since only one ventilation part is formed, if the ventilation part is blocked for some reason, the air permeability is hindered and detected. A situation in which the accuracy is reduced may occur.

  This invention is made | formed in view of this situation, The objective is to suppress the fall of the detection accuracy of to-be-detected gas by ensuring the air permeability with the atmosphere around an alarm device.

In order to solve this problem, the present invention detects a detection target gas contained in a case main body that constitutes a casing and a sensor chamber that is housed in the case main body and formed in the case main body. There is provided an alarm device that can be carried by a user, and includes a gas sensor that passes through the inside and outside of the case body, and a vent that allows the atmosphere around the case body to flow into the sensor chamber. In this case, the vent is formed on each of two or more surfaces forming the case body. The case main body has a horizontal hole formed by a concave groove as a passage through which the atmosphere around the case main body flows into the case main body, and the horizontal hole is formed in the same plane with respect to the horizontal hole. It is set so as to intersect the atmosphere and the inflow direction with respect to the vent.

  In the present invention, the case body preferably has a non-planar shape at least one surface on which the vent is formed.

  Moreover, in this invention, it is preferable that a case main body is provided with the protrusion part which protruded in the outer side in the part of the peripheral part of the horizontal hole in a case main body.

  According to the present invention, a plurality of ventilation holes can be set by providing ventilation holes on two or more surfaces forming the case body. As a result, even if one vent is blocked, the presence of the remaining vent can guarantee the air permeability with the atmosphere around the alarm device, so the detection of the gas to be detected A decrease in accuracy can be suppressed. In addition, even if one surface is blocked by forming the vents dispersed on two or more surfaces, the presence of the vents formed on the remaining surfaces can Air permeability with the surrounding atmosphere can be ensured.

The perspective view which shows typically the alarm device concerning this embodiment Front view schematically showing the alarm Top view schematically showing the alarm Bottom view schematically showing the alarm Side view schematically showing the alarm Perspective view showing the side of the case body Cross-sectional view of the case body with the side face

  FIG. 1 is a perspective view schematically showing an alarm device 1 according to the present embodiment. 2 is a front view schematically showing the alarm device, FIG. 3 is a top view schematically showing the alarm device, FIG. 4 is a bottom view schematically showing the alarm device, and FIG. 5 is a schematic diagram of the alarm device. FIG. The alarm device 1 according to the present embodiment is a gas alarm device that detects a detection target gas, for example, carbon monoxide (CO), and gives an alarm. In particular, a combustion instrument such as an incomplete combustion check of a combustion instrument is used. It is a portable gas alarm device that can be carried by a gas inspection facility operator (user) at the site where it is installed.

  The alarm device 1 includes a case body 10 formed by a front case 11 and a back case 12. The case main body 10 constitutes a hollow box-shaped housing having a plurality of surfaces, and houses a gas sensor and the like (not shown). In the present embodiment, the gas sensor is a CO sensor that detects the concentration of carbon monoxide in a sensor chamber that is a space formed in the case body 10, and the CO sensor includes an electrochemical gas sensor, a semiconductor gas sensor, or a contact sensor. A combustion gas sensor or the like can be used.

  The alarm device 1 includes a microcomputer (not shown) mainly composed of a CPU, ROM, RAM, and I / O interface inside the case body 10. The microcomputer is connected to a gas sensor, an alarm display unit 20, an alarm output unit 30, a power supply operation unit 40, and the like.

  As is well known, the microcomputer performs various processes and controls according to a predetermined program, and the ROM stores a control program for the CPU. And CPU performs various processes using the working area of RAM. The microcomputer reads the output of the gas sensor at a predetermined detection timing, and controls the alarm display unit 20 and the alarm output unit 30 when the concentration of carbon monoxide reaches a predetermined alarm level. I do.

  On the surface 10a of the case body 10, an alarm display unit 20 that performs an alarm by an alarm display, an alarm output unit 30 that performs an alarm by an alarm sound, and an operation unit 40 are provided.

  The alarm display unit 20 includes a lamp (not shown) such as an LED disposed in the case body 10. The alarm display unit 20 notifies that the carbon monoxide concentration has reached the alarm level by emitting light from the lamp through the CO alarm display area 21 marked “CO” in the case body 10. . In addition, the alarm display unit 20 notifies a device failure by turning on or blinking a lamp in the vicinity of the failure notification area 22 marked “notice”.

  The alarm output unit 30 includes a speaker (not shown) arranged in the case body 10. A plurality of sound emission holes 31 are formed in the case body 10 in order to output an alarm sound by a voice message from a speaker to the outside.

  The operation unit 40 includes buttons that can be operated by the user. The operation unit 40 includes, for example, an on button for turning on the power of the alarm device 1 and an off button for turning off the power of the alarm device 1.

  In the alarm device 1 having such a configuration, the case body 10 is formed with a plurality of vent holes 13 a to 13 d that penetrate the inside and outside of the case body 10. These vent holes 13 a to 13 d function as openings for allowing the atmosphere around the alarm device 1 to flow into the sensor chamber inside the case body 10.

  Of the pair of side surfaces 10b and 10c constituting the case main body 10, four vent holes 13a and 13b are formed in a region corresponding to one side surface 10b. Specifically, two vents 13a are formed in the region corresponding to the front case 11 side of the side surface 10b, and two vents 13b are formed in the region corresponding to the back case 12 side. . In addition, one vent hole 13 c is formed on the upper surface 10 d of the case body 10, and one vent hole 13 b is formed on the lower surface 10 d of the case body 10. As described above, the vent holes 13a to 13d are formed on the two or more surfaces 10b, 10d, and 10e constituting the case body 10 of the alarm device 1, respectively.

  In addition, a shape mainly composed of a curved surface is applied to the side surface 10b of the case body 10 in which the four vent holes 13a and 13b are formed. Specifically, the side surface 10b has an arc shape that covers the periphery of the substantially cylindrical sensor chamber when viewed in cross section, and as a whole, from the upper surface 10d side to the lower surface 10e side. It is formed in a substantially cylindrical shape extending. That is, the vent holes 13a and 13 corresponding to the side surface 10b are not formed on a flat surface, but are formed on a surface having a three-dimensional shape.

  Further, a lateral hole 14 is formed in the side surface 10 b of the case body 10. Here, FIG. 6 is a perspective view showing the side surface 10b of the case body 10, and FIG. 6B is an enlarged perspective view showing a region A shown in FIG. FIG. 7 is a cross-sectional view of the case body 10 with the side surface 10b of the case body 10 as the center.

  Specifically, as shown in FIG. 7, in the region corresponding to the side surface 10 b (the region corresponding to the back case 12), the ambient atmosphere advances substantially perpendicularly to the side surface 10 b and flows into the sensor chamber S. Instead, a lateral hole 14 is formed as a passage that flows into the sensor chamber S after proceeding along the lateral direction intersecting this, that is, along the surface direction of the side surface 10. In other words, the horizontal hole 14 is set so that the inflow direction of the atmosphere to the horizontal hole 14 is offset from the inflow direction of the atmosphere to the vent holes 13a and 13b formed on the same surface (side surface 10b). The lateral hole 14 is formed of a concave groove at a predetermined position on the side surface 10b.

  Further, in the back case 12, a protrusion 15 that protrudes outward is formed on a part of the peripheral edge of the lateral hole 14 on the surface of the case body 10.

  As described above, in the present embodiment, the vent holes 13 a to 13 d are respectively formed on the two or more surfaces 10 b to 10 e forming the case main body 10. According to this configuration, the plurality of vent holes 13a to 13d can be set by providing the vent holes 13a to 13d on the two or more surfaces 10b to 10e, respectively. Thereby, even if one of the vents 13a to 13d is blocked, the presence of the remaining vents 13a to 13d ensures the air permeability with the atmosphere around the alarm device 1. Therefore, it is possible to suppress a decrease in detection accuracy of the gas to be detected. It is also effective to set a plurality of vents for one surface. However, in the case of the portable alarm device 1, the size of the case body is small in consideration of portability, or the body of the user. There may be a situation where the entire surface of the case body is blocked, such as touching. In this respect, even if one of the surfaces 10b to 10e is blocked by being dispersed on the two or more surfaces 10b to 10e to form the vent holes 13a to 13d, the remaining surfaces 10b to 10e are formed. The presence of the vents 13a to 13d thus made can ensure the air permeability with the atmosphere around the alarm device 1.

  In the present embodiment, the case body 10 has at least one surface (side surface) 10b on which the vent holes 13a and 13b are formed set in a non-planar shape, specifically, a curved surface shape. According to such a configuration, when the shielding object covers the side surface 10b of the case body 10 such that the user's body and the case body 10 are in contact with each other, if the side surface 10b is a plane, the shielding object is It may come into contact with the surface and cover the entire side surface 10b, and all the vents 13a and 13b may be blocked. On the other hand, when the side surface 10b is set to a curved surface shape, it is possible to suppress a situation in which the entire side surface 10b is covered by the partial contact of the shield. Thereby, since possibility that the ventilation holes 13a and 13b formed in the side surface 10b will be blocked | closed can be reduced, the air permeability with the atmosphere around the alarm device 1 can be improved. Moreover, even if one vent hole 13a, 13b is blocked by forming a plurality of vent holes 13a, 13b on the surface (side surface) 10b set to such a non-planar shape, Since the probability that the remaining vents 13ab13b are blocked can be increased, it becomes more effective.

  Furthermore, the non-planar shape set on the surface of the case body 10 is not limited to the curved shape, and a three-dimensional shape can be widely adopted. For example, a wave shape or a triangular wave shape in which irregularities are periodically repeated may be used, or a single surface may be a polygonal shape constituted by a plurality of subdivided surfaces.

  Further, in the present embodiment, the case main body 10 has a lateral hole 14 configured with a concave groove as a passage through which the atmosphere around the case main body 10 flows into the case main body 10. The horizontal hole 14 is set so that the inflow direction of the atmosphere to the horizontal hole 14 is offset from the inflow direction to the vent holes 13a and 13b formed on the same surface 10b. According to this configuration, even if the atmosphere is difficult to flow in from the vents 13a and 13b due to the flow of the surrounding atmosphere, the sensor is provided with the lateral hole 14 in which the inflow direction is offset. The ambient atmosphere can be properly guided to the room. Thereby, the air permeability with the atmosphere around the alarm device 1 can be ensured.

  Further, in the present embodiment, the case main body 10 includes a protruding portion 15 that protrudes outward in a part of the peripheral edge portion of the lateral hole 14 in the case main body 10. According to such a configuration, since the peripheral portion of the lateral hole 14 in the case main body 10 does not have the same planar shape by providing the projecting portion 15, the lateral hole 14 is provided even in a situation where the lateral hole 14 is covered with a shielding object. A gap is ensured at the peripheral edge. As a result, a situation in which the lateral hole 14 is completely blocked can be suppressed, and the air permeability with the atmosphere around the alarm device 1 can be ensured.

  The alarm device according to this embodiment has been described above, but the present invention is not limited to this embodiment, and various modifications can be made within the scope of the invention. For example, the shape of the alarm device may be any gas sensor that can detect various detection target gases, and the detection target gas may be, for example, methane gas, propane gas, hydrogen gas, or the like.

DESCRIPTION OF SYMBOLS 1 Alarm 10 Case main body 10a Surface 10b Side surface 10c Side surface 10d Upper surface 10e Lower surface 11 Front case 12 Back case 13a Ventilation hole 13b Ventilation hole 13c Ventilation hole 13d Ventilation hole 20 Alarm display part 21 CO alarm display area 22 Fault notification area 30 Alarm output Part 40 Operation part

Claims (3)

In alarms that users can carry,
A case body constituting the housing;
A gas sensor that is contained in the case body and detects a detection target gas contained in a sensor chamber that is a space formed in the case body; and
A vent that penetrates the inside and outside of the case body and allows the atmosphere around the case body to flow into the sensor chamber,
The vents are respectively formed on two or more surfaces forming the case body ,
The case body has a lateral hole formed by a concave groove as a passage through which the atmosphere around the case body flows into the case body,
The said horizontal hole is set so that the inflow direction of the atmosphere with respect to the said horizontal hole may be offset with the inflow direction of the atmosphere with respect to the said vent formed in the same surface .   The alarm device according to claim 1, wherein the case main body has a non-planar shape at least one surface on which the vent is formed.   2. The alarm device according to claim 1, wherein the case main body includes a protruding portion protruding outward in a part of a peripheral edge portion of the lateral hole on the surface of the case main body.

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