JP2010039936A - Alarm - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To propose an alarm for reducing the mixture of any foreign matter to a space having a detection unit by providing a shielding cover for shielding the space having the detection unit. <P>SOLUTION: In a body unit 11, a guide unit 5 for guiding fluid flowing from a side wall 110 to a detection unit 3 is installed at the outer circumferential side of the detection unit 3. Then, shielding covers 116 and 117 for shielding each of the detection unit 3 and a base unit 10 side of the guide unit 5 and a top plate 115 side are installed at the body unit 11. Thus, a space where the detection unit 3 and the guide unit 5 are installed in the body unit 11 is formed as one space independent of the other space of the body unit 11 by the shielding covers 116 and 117. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an alarm device that measures an environmental value representing a change in environment from a fluid flowing into a detection unit and notifies an alarm.

  In general, as a fire alarm device for notifying a fire, a heat-sensitive fire alarm device (see Patent Document 1) having a heat-sensing element for detecting a room temperature, or a smoke-detecting fire alarm device having a smoke detector. There are provided a fire alarm (see Patent Document 2), a fire alarm device (see Patent Document 3) having both types, and the like. Then, as disclosed in Patent Document 1, the heat-sensing fire alarm device determines that a fire has occurred when the temperature detected by the heat-sensing element becomes high, and issues an alarm. I do. On the other hand, as shown in Patent Document 2, the smoke detection type fire alarm device determines that a fire has occurred when the amount of smoke measured by the smoke detector increases, and issues a warning. Do.

  Each of these fire alarms is configured as a sensor that detects a change in the surrounding environment from a fluid, and includes a detection chamber that constitutes a detection unit that measures temperature or smoke amount for fire detection. Similarly, a gas alarm that detects gas is also configured as a sensor that detects changes in the surrounding environment from the fluid. Various alarm devices that measure an environmental value with such a fluid need to have a structure for guiding the fluid to be measured in the detection unit in order to accurately detect changes in the surrounding environment.

  Therefore, many of the conventional alarm devices are heated fluids to be measured as a structure in which a detection chamber configured as a detection unit protrudes outside the housing, as shown in Patent Documents 1 to 3. And smoke are actively flowing into the detection chamber. That is, in an alarm device having a configuration represented by Patent Documents 1 to 3, an external environment (measurement) has a structure in which a detection unit protrudes from a housing that houses and protects circuit components and the like. Measurement is performed on a fluid in a state close to the external environment by arranging the detection unit in the target surrounding environment.

Thus, when an alarm device having a shape with a protruding projecting portion is installed in a room, it is not suitable for the design of the room, so that its beauty is impaired. Therefore, in recent years, in order to improve the design of the room where the alarm device is installed, it is required to reduce the size and thickness. And in order to implement | achieve size reduction and thickness reduction of this alarm device, the alarm device which has arrange | positioned the detection chamber inside a housing | casing, without making a detection chamber protrude in an external environment is proposed.
JP 09-044769 A JP 2005-352932 A JP 2002-352347 A

  In an alarm device that uses a fluid in the detection chamber as a measurement target, contamination of foreign matter such as dust greatly affects the measurement of the environmental value, so it is desirable to prevent contamination of the detection chamber. When a detection chamber is provided inside the alarm device, an insect screen is installed to cover the detection chamber that constitutes the detection unit. However, in the case of fine foreign matter such as dust, the detection is performed through the mesh of the insect screen. May enter the room. For this reason, when a detection room is installed in the alarm device, it is desirable that the installation space of the detection chamber in the alarm device can also suppress the entry of foreign substances such as dust.

  The alarm device is divided into a base and a main body. Then, after the base is installed and fixed on the installation surface such as the wall or ceiling, the main body with the detection unit and control unit is locked to the fixed base, and the alarm is installed and fixed on the installation surface. The At this time, as described above, when the detection chamber is provided inside the alarm device, the detection chamber is built in the main body portion of the alarm device, but the side of the main body portion that is locked to the base is spatially opened. When the alarm device is installed, dust generated by the installation work is mixed in the main body. For this reason, since the alarm device after installation and fixing is in a state in which foreign matter is mixed in the space having the detection chamber, the foreign matter in the detection chamber constituting the detection unit is affected by the influence of the fluid to be measured flowing into and out of the alarm device. There is a risk of contamination.

  In view of such a problem, an object of the present invention is to propose an alarm device that includes a shielding cover that shields a space having a detection unit, and reduces mixing of foreign matters into the space having the detection unit.

  In order to achieve the above object, the alarm device of the present invention includes a detection unit that detects an environmental value representing a change in a physical quantity of the surrounding environment by a fluid flowing from the outside, and a peripheral unit based on the environmental value detected by the detection unit. An alarm device comprising: a control unit for determining an abnormality in the environment; a housing that houses the detection unit and the control unit; and an external fluid that is formed on an outer peripheral wall of the housing to allow the fluid from outside An opening that flows into the interior, a space that is formed in the space between the opening and the detection unit in the housing, and guides an external fluid that has flowed in through the opening to the detection unit; and The inside of a housing | casing is provided with the shielding cover which makes the component part by the said detection part and the said guidance | induction part independent space.

  At this time, in the housing, the shielding cover is installed so as to divide the space in a direction along the outer peripheral wall, so that the space by the detection unit and the guide unit is an independent space in the housing. To do.

  In such an alarm device, the housing includes a base unit that is installed and fixed on an installation surface such as a wall or a ceiling, and a main body that is locked to the base unit and includes the detection unit and the control unit. The shielding cover may be provided on a boundary surface between the base part and the main body part.

  Further, in the main body, the space in which the control unit is installed and the space in which the detection unit and the guide unit are installed in the main body may be divided by the shielding cover. Furthermore, when the control unit is provided with a sounding body whose alarm issuing operation is controlled, and a space for installing the sounding body is provided in the main body, the sounding body installation space, the detection unit, and the guidance are provided. The installation space of the part may be divided.

  In addition, a guide wall that divides a space formed by the guide portion and forms a plurality of guide paths that guide the fluid from the opening to the detection portion is integrally provided with the shielding cover. Also good.

  According to the present invention, since the shielding cover is provided in the housing incorporating the detection unit, and the space formed by the detection unit and the guide unit can be made independent within the housing, it is configured in the housing together with the detection unit. In addition, it is possible to reduce the mixing of foreign matter into the guiding portion. Further, by shielding the guiding portion from the other space inside the housing by the shielding cover, it is possible to prevent contact by a worker or the like to the structure for guiding the fluid to be measured to the detecting portion. And since the space in which a guidance part is formed can be made into the space opened by the opening by the shielding cover, air currents other than the flow of fluid from the opening by a guidance part to a detection part can be prevented. Further, during installation work of the alarm device or battery replacement work, the shield cover prevents the operator from touching the guide portion.

<First Embodiment>
The alarm device of 1st Embodiment in this invention is demonstrated with reference to drawings. FIG. 1 is a schematic cross-sectional view showing the configuration of the alarm device of the present embodiment, and FIG. 2 is a side view showing the external configuration of the alarm device of the present embodiment.

  As shown in FIG. 1, the alarm device of the present embodiment is a circuit board in which circuit components constituting a control unit (not shown) that controls each operation of the alarm device are mounted inside a housing 1 that covers the entire alarm device. 2, a detection unit 3 that measures an environmental value when a fluid flowing in a surrounding environment (outside environment) outside the housing 1 flows in, and a sounding body 4 that issues an alarm to the outside. And since the detection part 3 and the sounding body 4 are electrically connected to the circuit board 2, the environmental value measured by the detection part 3 is given to the control part (not shown) on the circuit board 2 as an electrical signal. The necessity of alarm by the sounding body 4 is determined. When a control unit (not shown) configured on the circuit board 2 determines that an alarm should be issued, the alarm issuance operation of the sounding body 4 electrically connected to the circuit board 2 Is controlled, and a warning is issued by the sound generator 4.

  In such an alarm device, the housing 1 is configured by a substantially disc-shaped base 10 that is installed and fixed on an installation surface such as a ceiling or a wall, and a main body 11 that is locked to the base 10. Is done. The base unit 10 includes a bottom plate 100 having an end surface to be brought into contact with the installation surface, a side wall 101 serving as an outer peripheral wall erected from the outer peripheral edge of the bottom plate 100 on the side opposite to the installation surface, and the side wall 101. And a locking portion 102 having a hook-like cross-section projecting from the tip. That is, in the base part 10, one end surface of the ring-shaped side wall 101 is covered with the bottom plate 100, and the other end surface is an opening surface. And the main-body part 11 engages with the latching | locking part 102 provided in the edge part by the side of the opening surface of the side wall 101, and the main-body part 11 is fixed to the base part 10. FIG.

  The main body part 11 is formed along the circumferential direction with respect to the peripheral surface of the side wall 110 and a ring-shaped side wall 110 that forms an outer peripheral wall continuous with the side wall 101 when the main body part 11 is engaged with the base part 10. An opening 111, a horizontal beam 112 that divides the opening 111 along the axial direction of the side wall 110, and a vertical beam 113 that divides the opening 111 into a plurality of regions along the circumferential direction of the side wall 110. And a hook-shaped locking portion 114 projecting from the end of the side wall 110 on the side of the base portion 10 and a substantially disk-shaped top plate 115 covering the end surface of the side wall 110 opposite to the base portion 10. .

  That is, the main body 11 has a cylindrical shape in which a side wall 110 is erected on the base 10 side from the outer periphery of the top plate 115 and the base 10 side is open. Then, as shown in FIG. 2, the side wall 110 is provided with an opening 111 that opens in the circumferential direction, so that fluid flowing outside the housing 1 flows into the housing 1 through the opening 111, The fluid inside the housing 1 flows out of the housing 1 through the opening 111.

  Further, a ring-shaped horizontal beam portion 112 and a column-shaped vertical beam portion 113 are provided so as to intersect with each other at the configuration position of the opening 111 in the side wall 110. As shown in FIG. 2, the vertical crosspiece 113 is formed so as to be bridged from the base 10 side to the top plate 115 side with respect to the opening 111 in the side wall 110. The strength of the opening 111 is supplemented. A plurality of the vertical crosspieces 113 are provided along the circumferential direction of the horizontal crosspiece 112, thereby dividing the opening 111 into a plurality of regions along the circumferential direction.

  In the configuration example of FIG. 1 and FIG. 2, it is assumed that two horizontal rail portions 112 are formed along the axial direction of the side wall 110 at the configuration position of the opening portion 111, and the opening portion 111 extends along the axial direction. However, the number of the horizontal beam portions 112 is not limited to two. If the strength of the housing 1 is sufficient, the horizontal beam portions 112 may not be provided. Similarly, the number of installation of the vertical beam portions 113 may be any as long as the number of the vertical rail portions 113 is sufficient to contribute sufficient strength to the housing 1. Moreover, since the horizontal beam part 112 and the vertical beam part 113 inhibit the flow of the fluid which flows in into the housing | casing 11 through the opening part 111, respectively, it is desirable that the number of installation is small.

  Furthermore, the main body 11 includes shielding covers 116 and 117 that divide the space with respect to the axial direction of the main body 11, and the detection unit 3 is installed in a space covered by both of the shielding covers 116 and 117. In the space covered by the shielding cover 117 and the top plate 115, a control unit for controlling the alarm device is installed and the circuit board 2 electrically connected to the detection unit 3 or the circuit board 2 An electrically connected sounding body 4 for alarming is installed. The top plate 115 is provided with a sound hole 118 for transmitting vibration caused by sound from the sounding body 4 constituted by a buzzer or a speaker to outside air.

  That is, the shielding covers 116 and 117 are installed so that their surfaces are substantially parallel to the surfaces of the bottom plate 100 and the top plate 115, respectively, while the shielding cover 116 is provided on the base unit 10 side of the main body 11. A shielding cover 117 is provided on the top plate 115 side of the main body 11. The shielding cover 117 is provided with a through hole at the installation position of the detection unit 3 in the surface direction, and the detection unit 3 connected to the circuit board 2 is inserted into the through hole. Further, the space formed by the top plate 115, the shielding cover 117, and the side wall 110 becomes a resonance space that resonates with sound vibration from the sounding body 4 installed in the space. In addition, in the outer region of the detection unit 3 in the space covered by both the shielding covers 116 and 117, a guide unit 5 that guides the fluid flowing from the opening 111 provided in the side wall 110 to the detection unit 3 is formed. The

  As a result, when the shielding covers 116 and 117 are installed, the guide portion 5 is isolated from the space on the base portion 10 side and the space on the top plate 115 side (resonance space), and is opened at the opening portion 111. It becomes space. Therefore, the shielding covers 116 and 117 prevent dust from entering the guiding portion 5 from the space on the base portion 10 side and the space on the top plate 115 side. Further, since the airflow flowing through the guiding portion 5 from the space on the base portion 10 side and the space on the top plate 115 side is blocked by the shielding covers 116 and 117, the airflow in the guiding portion 5 can be restricted by the flow from the opening 111. . Further, the shielding covers 116 and 117 can prevent the operator from touching the guide portion 5 during the installation work of the alarm device or the battery replacement work.

  In addition, a battery case 7 holding the battery 6 for supplying power to the alarm device is provided in a part of the space region covered with both the shielding covers 116 and 117 where the guiding portion 5 is formed. 117 is erected to connect. Since the battery case 7 is a space covered by the shielding covers 116 and 117 and is provided between the opening 111 and the detection unit 3, the battery case 7 has a structure that blocks the flow of fluid from the opening 111 toward the detection unit 3. Become.

  In addition, the battery case 7 may be configured to be integrated with one of the shielding covers 116 and 117, or may be configured to be a separate body from either of the shielding covers 116 and 117. At this time, as shown in FIG. 1, in the battery case 7, the opening part into which the battery 6 is inserted is installed on the base part 10 side of the shielding cover 116. As a result, when the battery 6 is replaced in the alarm device, the battery 6 can be replaced without removing the shielding cover 116 when the main body 11 is removed from the base unit 10. The part 3 and the guide part 5 can be protected. Further, when the battery case 7 is integrated with one of the shielding covers 116 and 117, the opening of the battery case 7 can be installed on the base unit 10 side. Therefore, as shown in FIG. It is preferable to be integrated.

  As described above, the alarm device configured as described above is configured such that the base 10 is screwed with a fixing tool such as a screw in a state where the bottom plate 100 is in contact with the installation surface, so that the ceiling or the wall or the like. Fixed on the ground. Then, the main body part 11 is fixed to the base part 10 by engaging the engaging part 114 provided on the side wall 110 of the main body part 11 with the engaging part 102 provided on the side wall 101 of the base part 10. Connect. As described above, the main body 11 is provided with the shielding cover 116, and the shielding cover 116 covers the base 10 side of the space in which the detection unit 3 and the guide unit 5 are provided on the same plane. Therefore, when an operator attaches the main body part 11 to the base part 10 fixed to the installation surface, dust or the like generated during the work is formed in the space forming the detection unit 3 and the guide part 5 in the main body part 11. Mixing can be prevented.

<Second Embodiment>
An alarm device according to a second embodiment of the present invention will be described with reference to the drawings. FIG. 3 is a schematic cross-sectional view illustrating the configuration of the alarm device according to the present embodiment, and FIG. 4 is a plan view illustrating the configuration inside the main body of the alarm device according to the present embodiment. In the configuration of the alarm device of the present embodiment, the same parts as those of the configuration of the alarm device in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. Further, the alarm device of the present embodiment will be described on the assumption that the external appearance is shown in the side view of FIG. 2 as in the first embodiment.

  As shown in FIG. 3, the alarm device of the present embodiment is a guide that divides the guide portion 5 configured in the main body portion 11 into a plurality of regions with respect to the alarm device of the first embodiment (see FIG. 1). The wall 51 is added. That is, in the space covered with the shielding covers 116 and 117, a plurality of guide walls 51 extending from the opening 111 provided on the side wall 110 to the detection unit 3 are provided. Since the configuration other than the configuration by the guide wall 51 is the same as that of the first embodiment, the detailed description thereof will be referred to the first embodiment and will be omitted in this embodiment.

  The alarm device shown in FIG. 3 includes the plurality of guide walls 51 connected to the shielding covers 116 and 117, respectively, so that the guide portion 5 formed between the shielding covers 116 and 117 is in a plurality of regions. Divided. That is, as shown in FIG. 4, a plurality of guide walls 51 are erected substantially radially around the detection unit 3 with respect to the surface direction of the shielding cover 117, and a region divided by the adjacent guide walls 51 is formed. It functions as a guide path 52.

  At this time, the guide wall 51 erected with respect to the shielding covers 116 and 117 may be integrated with one of the shielding covers 116 and 117, or separate from either of the shielding covers 116 and 117. It is good also as what is comprised so that it may become. Further, in the configuration shown in FIG. 3, the battery case 7 is integrated with the shielding wall 116 together with the guide wall 51, whereby the guide wall 51 is directly connected to a protrusion such as the battery case 7 with respect to the guide portion 5. A protrusion such as the case 7 can be a part of the guide wall 51. In addition, by setting it as the structure in which the guidance wall 51 was integrated with either one of the shielding covers 116 and 117, the number of parts of an alarm device can be reduced and the manufacturing process can be simplified.

  Since the guide wall 51 is connected to the shielding covers 116 and 117, there is no gap between the guidance wall 51 and the shielding covers 116 and 117, so that not only dust can be prevented from being mixed into the guide path 52 but also the guidance can be prevented. It is possible to prevent fluid from flowing between the adjacent guide paths 52 via the wall 51. In addition, as in the first embodiment, by installing the shielding covers 116 and 117, the guide path 52 constituted by the guide wall 51 is separated from the space on the base unit 10 side and the space on the top plate 115 side. The space is isolated and opened at the opening 111. Therefore, the shielding covers 116 and 117 can prevent dust from being mixed into the guide path 52 from other spaces in the housing 1 and the flow of airflow, and contact of the guide wall 51 and the guide path 52 by the operator.

  With respect to the details of the guide wall 51 in the alarm device having such a configuration, a configuration example in the case where the detection unit 3 is a photoelectric smoke detection unit will be described below with reference to the plan view of FIG. As shown in FIG. 4, the detection unit 3 constituting the smoke detection unit is installed at a position eccentric from the center in the surface direction of the shielding cover 117. The guide wall 51 is installed so as to connect from the vertical rail portion 113 to the outer peripheral wall of the detection unit 3 in the opening 111 provided around the outer peripheral edge of the shielding cover 117.

  In addition, the detection unit 3 includes a plurality of labyrinth walls 302, a light emitting unit 303 including a light emitting diode L, and a light receiving unit 304 including a photodiode PD on the outer peripheral side of a bottom plate 301 serving as a photoelectric base. It becomes the composition which was done. And the edge part by the side of the detection part 3 of the guidance wall 51 is connected with the outer peripheral wall of the guidance wall 51 in the installation position of the labyrinth wall 302, the light emission part 303, and the light-receiving part 304, respectively. In other words, the guide wall 51 is provided so as to extend from each of the labyrinth wall 302, the light emitting unit 303, and the light receiving unit 304 that becomes an obstacle to the flow of the fluid (smoke) that flows into the detection unit 3. Thereby, the obstacle by the structure of the detection part 3 can be reduced with respect to the flow of the fluid induced | guided | derived by the guidance path 52 formed of the guidance wall 51. FIG. The detection unit 3 is configured so that the outer peripheral side thereof is covered with the insect net 305, so that insects and dust can be prevented from entering the detection unit 3.

  Some of the guide walls 51 include the battery case 7 and the connector 8 penetrating from the shielding cover 117 to the shielding cover 116 as a part thereof. That is, as the guide wall 51, there is one in which a protrusion in a space constituted by the shielding covers 116 and 117 is partially used. The guide wall 51 including the connector 8 as a part includes a guide wall 51 a extending between the vertical rail portion 113 and the connector 8, a connector 8, and a guide wall 51 b extending between the connector 8 and the detection unit 3. Consists of. Further, the guide wall 51 including the battery case 7 as a part includes a battery case 7 directly connected to the two vertical beam portions 113, and two guide walls 51 c extending between the battery case 7 and the detection unit 3. Consists of.

  By comprising in this way, each of the battery case 7 and connector 8 used as a protrusion can be functioned as a guide wall. The connector 8 is electrically connected to a control unit (not shown) on the circuit board 2 and has a shape penetrating from the shielding cover 117 to the shielding cover 116. With this configuration, the connector 8 can be protruded from the surface of the shielding cover 116 on the base portion 10 side. Therefore, when the main body part 11 is removed from the base part 10, an electrical signal is given to the connector 8 from the outside, and a control part (not shown) on the circuit board 2 is operated to operate the alarm. Is done.

  When the connector 8 is penetrated from the shielding cover 117 to the shielding cover 116 as described above, a columnar connector insertion member for connecting the shielding covers 116 and 117 is provided. The connector insertion member has a cross section of a tubular shape having a hole into which the connector 8 is inserted, so that the distal end of the connector 8 connected to the circuit board 2 passes through the connector insertion member and the base portion 10 side of the shielding cover 116. To the surface of This connector insertion member may be integrated with the above-described guide walls 51 a and 51 b, and may be further integrated with either one of the shielding covers 116 and 117 like the battery case 7. .

  The present invention can be applied to an alarm device including a detection unit that acquires an environmental value from a fluid. In particular, the present invention can be applied to an alarm device constituting a fire alarm device provided with a photoelectric smoke detector and a heat sensitive element, an alarm device constituting a gas alarm device for measuring a gas amount, and the like.

These are the schematic sectional drawings which show the structure of the alarm device of the 1st Embodiment of this invention. These are side views which show the external appearance structure of the alarm device of FIG. These are the schematic sectional drawings which show the structure of the alarm device of the 2nd Embodiment of this invention. These are top views which show the structure inside the main-body part in the alarm device of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Case 2 Circuit board 3 Detection part 4 Sounding body 5 Guidance part 6 Battery 7 Battery case 8 Connector 10 Base part 11 Main-body part 51 Guidance wall (guidance member)
51a-51c guide wall (guide member)
52 Taxiway 100 Bottom plate 101 Side wall (outer peripheral wall)
102 Locking part 110 Side wall (outer peripheral wall)
DESCRIPTION OF SYMBOLS 111 Opening part 112 Horizontal beam part 113 Vertical beam part 114 Locking part 115 Top plate 116,117 Shielding cover 118 Sound hole 301 Bottom plate 302 Labyrinth wall 303 Light emitting part 304 Light receiving part 305 Insect net

Claims (2)

An alarm device comprising: a detection unit that detects an environmental value representing a change in a physical quantity of the surrounding environment by a fluid flowing from the outside; and a control unit that determines an abnormality in the surrounding environment based on the environmental value detected by the detection unit In
A housing containing the detection unit and the control unit;
An opening formed on the outer peripheral wall of the housing for allowing an external fluid to flow into the main body;
A guide unit that is formed in a space between the opening and the detection unit in the housing and guides an external fluid that has flowed in through the opening to the detection unit;
Inside the casing, a shielding cover that makes the component part of the detection part and the guide part independent space;
An alarm device comprising: In claim 1,
A guide wall that divides a space formed by the guide portion and forms a plurality of guide paths for guiding the fluid from the opening to the detection portion is erected integrally with the shielding cover. Alarm to do.

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