JP4532597B2 - Fire alarm - Google Patents

Description

The present invention relates to a small-sized fire alarm that detects and alerts a fire by battery driving.

  Conventional fire detectors are installed in buildings, but a simple fire alarm that outputs an alarm with a built-in buzzer when a fire is detected so that it can be easily installed in ordinary homes. Has been put to practical use.

Japanese Unexamined Patent Publication No. 9-44769 JP-A-10-269474 Microfilm of actual application No. 60-15383 (Japanese Utility Model Application No. 61-133893) Microfilm of Japanese Utility Model No. 59-15383 (Japanese Utility Model Laid-Open No. 60-153394) Microfilm of Japanese Utility Model No. 61-94386 (Japanese Utility Model Laid-Open No. 63-2347)

  However, in such a conventional simple fire alarm, there is a problem that it has not been widely used in ordinary households and has not been fully utilized. This is because the conventional simple fire alarm has a fire detection mechanism, a fire detection circuit, and a fire alarm unit housed in the housing, so the shape is large and the wallpaper of the room when installed. The design may be damaged, a separate power source is required, and the installation location cannot be easily changed.

It is an object of the present invention to provide a fire alarm suitable for use in a general household without being damaged by easy installation due to significant downsizing.

  In order to achieve this object, the present invention is configured as follows. The fire alarm of the present invention includes an input unit that detects a fire, an output unit that outputs an alarm by a fire detection operation of the input unit, a power supply unit that supplies power to the output unit, and an axial direction relative to a radial dimension. A cylindrical case with a length determined by the battery stored in the power supply unit is provided, and the input unit, the output unit, and the power supply unit are stored in the vertical direction so that the power supply unit is located on the mounting side of the cylindrical case. A casing, a cap member that is detachably provided at an opening on the mounting side of the casing that stores the battery of the power supply unit, and a cap member that is detachably provided to the cap member for fixing to a mounting surface such as a ceiling surface or a wall surface A base member having a mounting hole to be used is provided.

  Here, the cap member is screwed into the opening on the attachment side of the housing, and the base member is screwed into the cap member.

  The input unit detects smoke from fire.

A notification indicator lamp is provided at the tip of the housing, and the output unit outputs an alarm and simultaneously turns on the alarm indicator lamp.

  According to the present invention, the main body having a diameter of 17 mm and a height of 80 mm, for example, is elongated and greatly downsized by the structure in which the input unit, the output unit, and the power supply unit are arranged in order in the vertical direction from the tip of the cylindrical case. A fire alarm with a shape can be obtained, and this small size makes it easy to install and less noticeable, so the surrounding design is not impaired.

  In addition, because of its small size and light weight, it can be easily attached to the ceiling or wall with a single wood screw, so it is easy to change the installation location, and only one screw mark is required after removal. Does not stand out.

  After installing the battery from the opening on the mounting side of the cylindrical case and screwing in the cap, it can be easily attached by screwing the cap onto the base attached to the ceiling or wall, and if necessary Can be removed easily.

  Functionally, when a fire is detected, an alarm is sounded, and a fire monitoring function comparable to a normal fire alarm is obtained. In addition, by providing a warning indicator light, the warning indicator light illuminates at the same time as the alarm sounds, and the warning indicator light is provided at the end of the elongated main body, so that the alert status can be easily confirmed from all directions. it can.

Furthermore, the fire alarm of the present invention can be used in a portable manner. For example, if you want to monitor a fire in another room for a certain period of time, you can remove the main body and carry it in another room and place it temporarily in that room.

Explanatory drawing which showed embodiment of the fire alarm by this invention Cross section of the fire alarm shown in FIG. Illustration of the base used to install the fire alarm in FIG. Explanatory drawing of the sealing cover used in the fire alarm of FIG. Explanatory drawing of the fire alarm according to the present invention with a sealing cover Illustration of the installed state of the fire alarm in FIG. Sectional drawing which showed other embodiment of the fire alarm by this invention Sectional drawing which showed other embodiment of the fire alarm by this invention provided with the warning indicator lamp Sectional drawing of other embodiment of this invention which changed arrangement | positioning of an input part, an output part, and a power supply part Sectional drawing of other embodiment of this invention which changed arrangement | positioning of an input part, an output part, and a power supply part Sectional drawing of other embodiment of this invention which reversed arrangement | positioning of the input part, the output part, and the power supply part with respect to FIG. Illustration of the installed state of the fire alarm in FIG.

  FIG. 1 is an explanatory view showing an embodiment of a fire alarm according to the present invention. In FIG. 1, the fire alarm device 10 of the present invention has a guard cover 20 attached to the tip side which is the lower part of a main body case 18, and a shape memory alloy spring 22 is formed in the guard cover 20 inside an opening 20 a opened in three directions. Is housed.

  The shape memory alloy spring 22 is displaced into a memory shape stored in advance at a predetermined fire temperature. Further, a through hole 20b is provided at the tip of the guard cover 20, and a test operation can be performed by inserting a thin rod into the inside and pushing it.

  2 is a cross-sectional view of the fire alarm of the present invention shown in FIG. In FIG. 2, the fire alarm device 10 of the present invention has an input unit 12, an output unit 14, and a power supply unit 16 arranged in the vertical direction from the front end side. A shape memory alloy spring 22 is housed in the guard cover 20 of the input unit 12, and a shaft 24 that is slidable in the axial direction is incorporated in the upper part of the shape memory alloy spring 22, and is urged to a position shown in the figure by the spring 26. ing.

  The guard cover 20 is screwed and fixed to the upper body case 18. An inner case 28 is incorporated in the main body case 18, a switch 30 and a buzzer 32 constituting the output unit 14 are incorporated in the inner case 28, and a battery 34 constituting the power source unit 16 is further provided on the upper side. It has been incorporated. The fire alarm 10 can be made smaller if the battery 34 is a size AA battery or a button type battery.

  The upper part of the shaft 24 provided in the guard cover 20 is fitted to the operation knob 30 a of the switch 30. For this reason, when the shape memory alloy spring 22 is expanded and displaced in the memory shape in response to heat from the fire, the shaft 24 is pushed upward against the spring 26, thereby pushing the switch knob 30 a, and the switch 30. The contact turns on.

  The positive side of the battery 34 is connected to one terminal of the buzzer 32 by the wiring 36a, and the other terminal of the buzzer 32 is connected to one terminal of the switch 30 through the wiring 36b. The other terminal of the switch 30 is connected to the main body case 18 by a wiring 36c. Here, the main body case 18 is a metal case, and is therefore electrically conductive, whereby the wiring 36 c is connected to the battery 34 via the main body case 18 via the contact spring 40.

  For this reason, when the switch 30 is turned on by deformation of the shape memory alloy spring 22 when it receives heat from a fire, a circuit is formed from the positive side of the battery 34 through the buzzer 32 and the switch 30 to the negative side of the battery 34. The buzzer 32 sounds. The alarm sound of the buzzer 32 is output to the surroundings through a buzzer hole 33 provided in the main body case 18.

  A cap 38 is screwed and fixed to the upper portion of the main body case 18. The fire alarm device 10 of the present invention can be fixed by screwing the inner screw portion of the cap 38 provided on the upper side with respect to the base 42 fixed to the mounting surface 48 side. The base 42 is attached to the attachment surface 48 by screwing and fixing it using wood screws or the like through the attachment screw holes 44. Furthermore, the sealing cover 46 can be attached after the fire alarm 10 is attached to the attachment surface 48 by the base 42.

  In the embodiment of the fire alarm 10 of the present invention, the dimensions thereof have an elongated overall shape with a diameter of 17 mm and a height of 80 mm. That is, the size of the fire alarm 10 of the present invention can be said to be about half the size of a magic pen that is normally used, and it can be greatly reduced in size compared to conventional fire alarms for ordinary households. It is illustrated.

  FIG. 3 is an explanatory view of the base 42 used for mounting the fire alarm 10 of the present invention. FIG. 3A shows the base 42 viewed from the lower side, and FIG. 3B shows the base 42 viewed from the upper side.

  The base 42 is formed with a screw part 42b into which the upper cap 38 of the fire alarm 10 shown in FIG. 2 is screwed, and an attachment screw hole 44 is opened from the inside at the upper part. For this reason, the base 42 can be easily attached to the attachment surface by using wood screws through the attachment screw holes 44 from the inside. In addition, when the base 42 is removed to change the mounting location, only the trace of one screw remains after that, and the trace is hardly noticeable even when the base 42 is removed.

  FIG. 4 is an explanatory view of the sealing cover 46 used in the fire alarm 10 of the present invention. The sealing cover 46 is a tap-like member, made of plastic or urethane rubber, and penetrates the mounting hole 50 in the center. As shown in FIG. 2, the sealing cover 46 is fitted into the mounting surface 48 from the lower side with the cap 38 on the upper part of the fire alarm 10 screwed and fixed to the base 42 fixed to the mounting surface 48. Good.

  FIG. 5 is an explanatory diagram of the installed state of the fire alarm 10 of the present invention with the sealing cover 46 attached. By attaching the sealing cover 46 after attaching the fire alarm 10 in this way, the base 42 used for the attachment can be hidden, and the design of the ceiling surface is not impaired.

  FIG. 6 is an explanatory diagram of the installation state of the fire alarm 10 of FIG. FIG. 6A shows a state where the fire alarm 10 of the present invention is attached to the ceiling surface 52 and the sealing cover 46 is attached. FIG. 6B shows a state in which the fire alarm device 10 of the present invention is attached to the wall surface 54 and the sealing cover 46 is attached.

  As apparent from the installation state of the fire alarm device 10 of the present invention, the fire alarm device 10 is as small as 17 mm in thickness and 80 mm in height. When attached, it is hardly noticeable and does not impair the design of the room or wallpaper.

  Next, the operation of the fire alarm 10 of the present invention will be described with reference to the cross-sectional view of FIG. For example, when the fire alarm 10 is attached to the ceiling surface 52 as shown in FIG. 6 (A), the shape memory alloy spring 22 incorporated in the input portion 12 at the tip is subjected to a predetermined memory temperature when receiving a hot air current due to a fire. When it reaches, it expands into a memory shape and pushes up the shaft 24 against the spring 26, whereby the switch 30 is turned on.

  When the switch 30 is turned on, a current flows from the positive side of the battery 34 through the buzzer 32 and further through the switch 30 to the negative side of the battery 34, and the buzzer 32 sounds and a fire alarm is issued. If the temperature of the shape memory alloy spring 22 returns to the normal temperature after the fire alarm is issued, the shaft 24 is restored to the initial position shown in the figure by the force of the spring 26 and the switch 30 is turned off, whereby the buzzer 32 sounds. To stop. It should be noted that once the switch 30 is turned on, the fire alarm may be held continuously or may be sounded only for a predetermined time regardless of the state of the switch 30.

  The operation of the fire alarm 10 according to the present invention is confirmed by inserting a stick thinner than the through hole 20b provided at the tip of the guard cover 20 and pushing the switch knob 30a of the switch 30 through the through hole 24a of the shaft 24. 32 can be sounded experimentally.

  Also, when the fire alarm 10 of the present invention gives a false alarm, the user confirms the site, confirms that there is no fire, then removes the main body side of the fire alarm 10 from the base 42 and removes the cap 38. If the battery 34 is removed, the buzzer 32 can be stopped. In an example in which the fire alarm is not held, the ringing of the fuser 32 can be stopped by cooling the shape memory alloy spring 22 by removing the fire alarm 10 from the base 42 and shaking it.

  When the fire alarm device 10 of the present invention is to be used in a portable manner, the fire alarm device 10 on the main body side is removed from the base 42, and it is taken as it is to another room. If the base 42 is mounted in advance, or the fire alarm 10 is set up at an arbitrary place in the room, for example, with the cap 38 side down, it can be used in a portable manner. The fire may be monitored by simply attaching the base 42 to a wall surface with a double-sided tape.

  FIG. 7 is a cross-sectional view showing another embodiment of the fire alarm device 10 according to the present invention. This embodiment is characterized in that a test rod 56 for operation confirmation is provided. In FIG. 7, the fire alarm 10 is comprised from the front end side by the input part 12, the output part 14, and the power supply part 16, and each structure is the same as embodiment of FIG.

  In addition to this, in the embodiment of FIG. 7, the test rod 56 is assembled from the through hole 24 b at the tip of the guard cover 20 through the through hole 24 a of the shaft 24, and the flange portion 56 a is integrally formed in the middle of the test rod 56. , Prevents slipping out of the through hole 24b. By providing such a test rod 56, the switch 30 is turned on by pushing the knob 56b taken out from the tip of the guard cover 20 with a fingertip, and the operation confirmation by the sound of the buzzer 32 can be easily performed. .

  The test rod 20 is not limited to the one that directly presses the switch 30, and the switch 30 may be turned on by abutting the shaft 24 and pushing up the shaft 24. Further, the cap 38 and the base 42 can be attached with one touch by corresponding protrusions and depressions.

  FIG. 8 is a cross-sectional view showing another embodiment of a fire alarm according to the present invention, and this embodiment is characterized in that an alarm indicator lamp 58 is provided. In FIG. 8, the fire alarm 10 has an input unit 12, an output unit 14, and a power supply unit 16 arranged in the vertical direction from the front end side, and the structure of each unit is the same as that of the embodiment of FIG. 2.

  In addition to this, in the embodiment of FIG. 8, an alarm indicator lamp 58 is mounted outside the through hole 20 b at the tip of the guard cover 20. For the warning indicator lamp 58, the wiring 36d is connected to one lead from the terminal of the switch 30, and the wiring 36e is connected to the main body case 18 made of alloy through the assembly portion of the switch 30 from the other lead. The battery 34 is connected to the negative side of the battery 34 through the main body case 18.

  For this reason, when the shape memory alloy spring 22 is expanded to a memory shape in response to heat from the fire and the switch 30 is turned on via the shaft 24, the buzzer 32 is sounded and the alarm indicator lamp 58 is turned on at the same time. Since the alarm indicator lamp 58 is provided at the tip of the fire alarm device 10, the lighting state of the alarm indicator lamp 58 can be easily confirmed from all directions around.

  Further, in FIG. 8, a test button 64 for confirming the operation is provided around the body case 18. A test switch 62 is connected in parallel to the switch 30. When the test button 64 is pressed from the outside, the test switch 62 is turned on and the fuzzer 32 sounds.

  FIG. 9 is a cross-sectional view of another embodiment of the present invention in which the arrangement of the input unit, the output unit, and the power supply unit is changed. In the embodiment of FIG. 9, the switch 30 that constitutes a part of the output unit is arranged in the vertical direction following the input unit 12, and the buzzer 32 that is part of the output unit and the battery 34 that is the power source unit. Is characterized in that it is incorporated horizontally in the main body case 60.

  The input unit 12 incorporates a shape memory alloy spring 22, a shaft 24, and a spring 26 in the outer cover 20, and is further provided with test through holes 20b and 24a. In this way, only the part of the switch 30 that constitutes a part of the input unit and the output unit is arranged in the vertical direction, and the remaining buzzer 32 and the battery 34 are arranged in the horizontal direction. Although the dimension in the height direction can be reduced and the horizontal dimension is increased accordingly, the size can be sufficiently reduced as a whole.

  FIG. 10 is a cross-sectional view of another embodiment of the present invention in which the arrangement of the input unit, the output unit, and the power supply unit is changed. In this embodiment, only the input unit 12 and the output unit 14 of FIG. 2 are arranged in the vertical direction, and the battery 34 serving as the power supply unit is housed in the main body case 60 and arranged in the horizontal direction. And The configurations of the input unit 12 and the output unit 14 are the same as those in the embodiment of FIG. Even in the embodiment of FIG. 10, the battery 34 serving as the power supply unit is arranged in the lateral direction, and accordingly, the dimension in the height direction can be made smaller than that in the embodiment of FIG. 2.

  FIG. 11 is a cross-sectional view showing another embodiment of the present invention. In the fire alarm device 100 of this embodiment, the power supply unit 16 and the output are sequentially arranged from the tip side, contrary to the embodiment of FIG. The unit 14 and the input unit 12 are arranged in the vertical direction.

  That is, the power supply unit 16 and the output unit 14 on the distal end side incorporate a battery 34 and a buzzer 32 in an inner case 28 in the main body case 18, and a cap 62 is connected to the lower end of the main body case 18 via a contact spring 40 inside. It is fixed by screwing. The main body case 18 and the cap 62 use a conductive metal case for electrical connection with the negative side of the battery 34. A buzzer 32 is provided in the output unit 14 at the top of the battery 34, and a switch 30 is provided above the buzzer 32.

  The upper part of the main body case 18 is screwed and fixed to the lower end of the guard case 61. The guard case 61 has a screwed part with respect to the base 42 at the upper part, and has an opening 61a that opens to the side, and is fitted to the switch knob 30a. Yes. A through hole 61 b is formed in the upper center of the guard case 61, and a through hole 24 a is also formed in the shaft 24.

  Here, as apparent from the comparison with the embodiment of FIG. 2, the output unit 14 and the power supply unit 16 have a structure in which the output unit 14 and the power supply unit 16 of FIG. 2 are turned upside down, and other structures are completely different. The same. Further, the input unit 12 has a shape unique to the embodiment of FIG. 11, but the built-in shape memory alloy spring 22 and shaft 24 are the same as those of the embodiment of FIG. Yes.

  12A is a diagram when the fire alarm 100 of FIG. 11 is attached to the ceiling surface, and FIG. 12B is a diagram when it is attached to the wall surface.

  In the embodiment of FIG. 11, the input unit 12 including the shape memory alloy spring 22 is disposed at a position close to the mounting surface 48 side such as the ceiling surface 52 and the wall surface 54, for example, along the mounting surface 48. The fire detection sensitivity can be increased against the flowing hot air flow.

  In the operation of the fire alarm 100 in the embodiment of FIG. 11, when the shape memory alloy spring 22 receives heat from the fire and reaches a predetermined memory temperature, it extends into the memory shape and pushes down the shaft 24 against the spring 26. As a result, the switch 30 is turned on. When the switch 30 is turned on, a circuit that flows from the positive side of the battery 34 to the negative side of the battery 34 via the buzzer 32 and the switch 30 is formed, and the buzzer 32 sounds and an alarm is output. When the alarm due to the fire detection operation is stopped, the shape memory alloy spring 22 may be cooled or the cap 34 may be removed to remove the battery 34.

  When the operation of the fire alarm 100 is confirmed, the fire alarm 100 is removed from the base 42, and a rod thinner than the through hole 61 b opened at the top of the guard case 61 is directed toward the through hole 24 a of the shaft 24. By inserting and pushing the switch knob 30a of the switch 30 to turn it on, the buzzer 32 can be sounded to check the operation.

  Moreover, even in the fire alarm device 100 of this embodiment, the portable alarm device 100 can be used by removing it from the base 42. Further, when a false alarm is issued, the cap 62 may be removed and the battery 34 may be removed.

  Furthermore, even in the fire alarm 100 of the embodiment of FIG. 11, as in the embodiment of FIG. 2, the diameter can be almost the same shape as 17 mm and the height is 80 mm, and it can be installed with sufficient miniaturization. The design around the place is not impaired, and since it is lightweight and compact, it can be easily attached with a single wood screw by the base 42 or the installation place can be changed.

  In the above embodiment, the case where the shape memory alloy spring 22 is used as the fire detection mechanism of the input unit 12 is taken as an example. However, the fire detection unit detects the heat or smoke due to the fire. It is also good.

  Further, by using a shape memory alloy spring as the spring 26 in the embodiment of FIG. 2, the shaft 30 is moved by the difference in the spring load of the original shape memory alloy spring 22 and the switch 30 is turned on so that the differential type is used. A heat sensor may be configured.

  In the present embodiment, the input unit, the output unit, and the power supply unit are arranged vertically and one end is attached to the ceiling or the like as an attachment unit. However, the present invention is not limited to this, and the input unit, output unit, and power supply unit are arranged. In such a state, the side surface of the main body case may be used as the attachment portion, and a fire alarm that is long and thin along the attachment surface can be configured.

  In this embodiment, the input unit is provided at one end of the fire alarm. However, the present invention is not limited to this, and the input unit may be arranged between the output unit and the power supply unit.

The present invention includes appropriate modifications that do not impair the objects and advantages thereof, and is not limited by the numerical values shown in the above-described embodiments.

DESCRIPTION OF SYMBOLS 10,100: Fire alarm 12: Input part 14: Output part 16: Power supply part 18, 60: Main body case 18a: Case 20: Guard cover 20a, 60a: Opening part 20b, 24a, 60b: Through hole 22: Shape memory alloy Spring 24: Shaft 26: Spring 28: Inner case 30: Switch 30a: Switch knob 32: Buzzer 34: Batteries 36a to 36c: Wiring 38, 62: Cap 38b: Screw portion 40: Contact spring 42: Base 44: Mounting screw hole 46: Sealing cover 48: Mounting surface 50: Mounting hole 52: Ceiling surface 54: Wall surface 56: Test rod 58: Alarm indicator lamp 61: Guard case 62: Test switch 64: Test button

Claims (4)

An input to detect fire;
An output unit that outputs an alarm by the fire detection operation of the input unit;
A power supply for supplying power to the output;
A cylindrical case whose axial dimension is longer than a radial dimension and whose thickness is determined by a battery housed in the power supply unit; and the input unit so that the power supply unit is located on the mounting side of the cylindrical case, A housing in which the output unit and the power supply unit are arranged in a vertical direction;
A cap member detachably provided in an attachment side opening of the housing for storing the battery of the power supply unit;
A base member provided detachably with respect to the cap member, and having a mounting hole used for fixing to a mounting surface such as a ceiling surface or a wall surface;
A fire alarm characterized by the provision of
2. The fire alarm according to claim 1, wherein the cap member is screwed into an attachment side opening of the casing, and the base member is screwed into the cap member. .
The fire alarm according to claim 1, wherein the input unit detects smoke due to fire.
  2. The fire alarm according to claim 1, wherein an alarm indicator lamp is provided at a tip of the casing, and the output section outputs the alarm and simultaneously turns on the alarm indicator lamp. .

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