JP5039533B2 - Alarm - Google Patents

Description

  The present invention relates to an improvement of an alarm device that detects smoke, heat, gas, and the like in an environment such as a house and issues an alarm when these values exceed a predetermined level.

  Conventionally, as an alarm device for detecting smoke, heat, gas, etc. in an environment such as a house, a detection unit for detecting a physical quantity such as smoke, heat, gas, etc., and a physical quantity detected by the detection unit are predetermined. There is known a speaker equipped with a speaker that issues an alarm when the level is exceeded.

For example, Patent Document 1 discloses and proposes a fire alarm device in which a speaker storage space for storing a speaker is provided on the side of the alarm device body, and detects smoke and heat generated at the time of a fire to detect the alarm device. An alarm sound is emitted from a speaker housed in the main body.
JP 2007-257107 A

  However, in the alarm device disclosed in Patent Document 1 described above, since the speaker storage space is provided on the side of the alarm device main body, the alarm sound toward the front of the speaker is configured by a detection unit or the like provided in the center. There is a problem that the volume of the speaker is reduced on the side blocked by the components, and thus blocked by the components.

  Accordingly, various structures of alarm devices have been developed in which a speaker storage space is provided directly below the alarm device body.

  For example, FIG. 8 is an explanatory view showing such a conventional alarm device 21. In such an alarm device 21, the speaker housing space 27 is provided immediately below the alarm device body 23, so that the alarm sound component 28 that faces the front of the speaker 24 is not blocked by the components of the alarm device.

  However, since the speaker storage space 27 protrudes from directly below the alarm device main body and is provided at the center position thereof, components cannot be disposed at the center position of the alarm device main body 23, and the entire device is thin. It was not possible to plan.

  The present invention has been made in view of the above circumstances, and the volume of sound output from a speaker does not decrease depending on the direction, and components can be arranged in the speaker storage space, so that the entire apparatus can be thinned. The purpose is to provide an alarm.

In order to solve the above-described object, an alarm device according to claim 1 includes a detection unit that detects a physical quantity in an environment, an alarm body that incorporates the detection unit, and a physical quantity that is detected by the detection unit is a predetermined level or more. An alarm device that emits an alarm when the alarm occurs, and a speaker storage space for storing the speaker is provided on the side opposite to the installation surface of the alarm device body, and the speaker is stored in the speaker storage device. Provided at a position deviated from the center of the space in the peripheral direction , a side shielding part is provided on the side of the speaker storage space where the speaker is installed, and the side opposite to the side where the speaker is installed opening is provided in, by the side shield portion, rear sound generated of the speaker is characterized in that it is a structure for shielding from Komu around the front of the speaker There.

Between the said side shield section and the speaker may be further provided a sound absorbing member.

  According to the alarm device of the first aspect, since the speaker storage space is provided on the side opposite to the installation surface of the alarm device body, the sound volume output from the speaker is blocked by the alarm device components and decreases. There is nothing. Also, in the speaker storage space provided on the side opposite to the installation surface of the alarm unit, the speaker is provided at a position that is biased in the peripheral direction from the center of the alarm unit, so it is also configured at the center of the alarm unit. Parts can be arranged, and the entire apparatus can be made thinner.

Next, because the speaker storage space is open, the speaker cavity space is opened to the outside. As a result, even if the speaker storage space is made thin and compact, the speaker diaphragm is vibrated as in the case of a sealed cavity. There is no suppression. Therefore, the entire alarm device can be reduced in size without reducing the volume.

  In addition, since the side wall where the speaker is installed is provided with a side shielding wall that shields the sound generated from the rear, an alarm sound that is emitted in front of the speaker and a rear sound that is approximately 180 degrees out of phase with the alarm sound. The sound does not interfere with the volume.

  In addition, since an opening is provided on the opposite side opposite to the side where the speaker is installed, the alarm sound emitted in front of the speaker and the sound generated backward from the opening are As a result of the increase in the distance from the speaker to the opening even if the interference occurs, the rear generated sound is shifted in phase by 180 degrees or more from the alarm sound when the rear generated sound reaches the front of the speaker. Therefore, it is less likely that the volume of the alarm sound is canceled.

Thus, according to the alarm device according to claim 1 , not only can the thickness be reduced by the open cavity space, but also the side opposite to the side where the speaker is installed on the side where the speaker is installed. On the other hand, the volume of the warning sound emitted in front of the speaker is not canceled out by the backward generated sound, and a higher warning sound level can be maintained.

Furthermore, in the configuration in which the sound absorbing member is further provided between the side shielding wall and the speaker, the vibration of the side shielding wall is reduced by suppressing the backward generated sound from moving toward the side shielding wall, It is less likely that the volume of the sound is reduced due to interference between the vibration sound of the side shielding walls and the alarm sound emitted in front of the speaker.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a preferred embodiment of the invention will be described with reference to the accompanying drawings. FIG. 1 is a conceptual diagram showing a configuration of an alarm device 1 according to a first embodiment of the present invention, and shows a schematic side surface. FIG. 2 is a block diagram showing a configuration of the detector substrate 2c of the alarm device 1, and FIG. 3 is a perspective view showing a configuration around the speaker 4 of the alarm device 1. As shown in FIG. FIG. 4 is an explanatory view showing the configuration around the speaker 4 of the alarm device 1, wherein (a) shows a side view and (b) shows a bottom view.

  Referring to FIG. 1, the alarm device 1 generates an alarm when smoke, heat, or gas exceeds a predetermined level in an environment such as a house, and therefore detects these physical quantities in the environment and generates an electrical signal. A detection unit 2 having a detection unit 2a to be converted, an alarm body 3 holding the detection unit 2, a control unit 2b for determining whether or not a physical quantity detected by the detection unit 2a is equal to or higher than a predetermined level, and a control The unit 2b includes a speaker 4 that is activated when the physical quantity detected by the detection unit 2a exceeds a predetermined level and emits an alarm sound 8. The alarm device 1 also includes a speaker structure 5 for attaching to the alarm device body 3 while holding the speaker 4 behind the speaker 4, and a cover plate 6 of the speaker 4 provided in front of the speaker 4. ing.

  In the case of a smoke detector, the detection unit 2 includes a smoke detection chamber for introducing outside air. The smoke detection chamber is provided with a light emitting element and a light receiving element, and the light emitting element is driven at a predetermined cycle to detect the emitted light. The smoke concentration is detected by applying the scattered light from the smoke particles to the smoke particles that have flowed into the room and receiving the scattered light from the smoke particles into an electric signal.

  Here, the detector substrate 2c is a printed circuit board on which electronic components such as ICs are mounted. As shown in FIG. 2, the physical components detected by the electronic components constituting the detector 2a and the detector 2a are predetermined. A control unit 2b that determines whether or not the level is higher, a power supply unit 2d that supplies power to the control unit 2b, an audio IC 2e, and an amplifier 2f are mounted. Power is supplied from the battery stored in the battery.

  Referring back to FIG. 1 again, the alarm main body 3 is a substantially cylindrical housing for holding the detector 2, and a cylindrical portion 3a formed by bending a color steel plate and the cylindrical portion. A disk-shaped base plate 3b for supporting 3a and attaching to a structure such as a ceiling (not shown) with a bolt or the like is provided.

  The speaker 4 is used to generate an alarm when the smoke density, which is a physical quantity detected by the detection unit 2a, exceeds a predetermined level. The speaker 4 generates an alarm sound 8 by an audio signal amplified by the amplifier 2f of the detector substrate 2c sent via the lead wire 4a.

  As shown in FIG. 3, the speaker structure 5 is a substantially disk-shaped structure made of an aluminum alloy thick plate that is attached to the alarm device main body 3 with screws (not shown) while holding the speaker 4 behind the speaker 4. The speaker structure 5 is provided with five columnar spacer portions 5a projecting downward for connecting the cover plate 6 of the speaker 4 to the speaker structure 5.

  The cover plate 6 has a porous portion 6b provided with a large number of passage holes 6a for allowing the alarm sound 8 from the speaker 4 to pass in front of the speaker 4, and a rear generated sound 9 from the rear of the speaker 4 (FIG. 1). Is provided with a shield 6c that shields the speaker 4 from moving forward, and this cover plate 6 is attached to the end of the spacer 5a with screws 6d.

  The speaker structure 5 and the cover plate 6 form a speaker storage space 7 for storing the speaker 4 on the opposite side of the installation surface of the alarm body 3, that is, on the lower side. A so-called cavity space is provided around 4 to enhance the acoustic effect of the speaker 4.

  In the present embodiment, the speaker 4 is particularly provided at a position deviated from the center of the speaker storage space 7 in the peripheral direction. In the first embodiment, a structure in which the side of the speaker storage space 7 is opened over the entire periphery, that is, the side where the speaker 4 is installed and the side opposite to the side where the speaker 4 is installed. It is said.

  Next, the basic operation of the alarm device 1 according to the first embodiment of the present invention will be described with reference to FIG. 1 and FIG.

  The operation in which the alarm device 1 issues a warning when the smoke concentration is detected and this value exceeds a predetermined level in an environment such as a house is as follows.

  That is, as shown in FIG. 1, when the outside air is introduced into the detector 2 and the smoke concentration converted into an electric signal is equal to or higher than a predetermined level in the detector 2a, the voice IC 2e is activated and preset. Generate an audio signal. Then, the amplifier 2f amplifies the audio signal from the audio IC 2e and the alarm sound 8 is emitted from the speaker 4.

  At this time, the passage hole 6 a of the porous portion 6 b of the cover plate 6 allows the alarm sound 8 from the speaker 4 to pass in front of the speaker 4, and the shielding portion 6 c of the cover plate 6 causes the sound generated rearward from the rear of the speaker 4. 9 is shielded from moving forward of the speaker 4, and the speaker storage space 7 serves as a cavity space of the so-called speaker 4 to enhance the acoustic effect.

  According to the present embodiment, since the speaker storage space 7 is provided on the side opposite to the installation surface of the alarm device body 3, that is, on the lower side, the alarm device of the type in which the speaker storage space 7 is provided in the alarm device body 3. Unlike 1, the alarm sound 1 that goes to the front of the speaker 4 is not blocked by the components of the alarm 1.

  In addition, since the side of the speaker storage space 7 is open, the cavity space of the speaker 4 is opened to the outside. As a result, even if the cavity space is made thin and compact, the vibration of the speaker diaphragm is not suppressed as in the case of the sealed cavity. Therefore, the entire alarm device 1 can be effectively downsized without lowering the volume.

  Further, since the speaker 4 is provided in the speaker storage space 7 at a position deviated from the center of the alarm device body 3 in the peripheral direction, components can be arranged at the center of the alarm device body 3, and the entire device Thinning can be achieved.

  Thus, according to the alarm device of the present invention, it is possible to realize a small and high-volume home alarm device that detects physical quantities of smoke, heat, and gas. In particular, it is suitable for a home alarm device in which a battery is often housed because it can be thinned.

  Next, with reference to FIGS. 5 to 7, an alarm device according to a second embodiment of the present invention will be described. FIG. 5 is a conceptual diagram showing a configuration of an alarm device according to the second embodiment of the present invention, and shows a schematic side view. FIG. 6 is a perspective view showing the configuration around the speaker of the alarm device. FIGS. 7A and 7B are explanatory views showing a configuration around the speaker of the alarm device, where FIG. 7A is a side view, FIG. 7B is a bottom view, and FIG. 7C is a cross-sectional view taken along line AA in FIG. Each is shown. In the following description, the same members as those of the alarm device according to the first embodiment of the present invention are denoted by the same reference numerals, and redundant description is omitted.

  As shown in FIGS. 5 to 7, in the alarm device 11 according to the second embodiment of the present invention, the alarm is generated behind the speaker 4 on the side where the speaker 4 is installed in the speaker storage space 7. A side shielding wall 12 is provided to shield the rear generated sound 9 that wraps around the front surface of the speaker 4. A sound absorbing member 13 is provided between the side shielding wall 12 and the speaker 4 to suppress the backward generated sound 9 from moving toward the side shielding wall 12.

  On the other hand, an opening 7c is provided on the side opposite to the side where the speaker 4 is installed in the speaker storage space 7, and the side is opened.

  Thus, according to the alarm device 11 according to the second embodiment, the side shielding wall 12 that shields the rear generated sound 9 is provided on the side where the speaker 4 is installed. Thus, the alarm sound 8 emitted in front of the sound and the rear generated sound 9 that is approximately 180 degrees out of phase with the alarm sound 8 are not interfered with each other so that the volume is not lowered.

  Further, since the side opposite to the side where the speaker 4 is installed has a structure in which the side is opened, an alarm sound 8 emitted in front of the speaker 4 and a rear generated sound emitted outside from the opening 7c. 9 interferes with the front of the speaker 4, but in this case, when the distance from the speaker 4 to the opening 7 c becomes longer, the rear generated sound 9 wraps around the front of the speaker 4. The generated sound 9 is out of phase with the alarm sound 8 by 180 degrees or more. Therefore, it is less likely that the volume of the warning sound 8 is canceled out.

  Further, not only can the thickness be reduced by the open cavity space, but also an alarm issued in front of the speaker 4 both on the side where the speaker 4 is installed and on the opposite side opposite to the side where the speaker 4 is installed. Since the volume of the sound 8 is less likely to be canceled by the backward generated sound 9, a higher warning sound 8 level can be maintained.

  Furthermore, according to the alarm device 11 according to the second embodiment, since the sound absorbing member 13 is provided between the side shielding wall 12 and the speaker 4, the rear generated sound 9 is generated from the side shielding wall 12. The vibration of the side shielding wall 12 is reduced by restraining the sound from being directed to the sound, and the vibration sound of the side shielding wall 12 and the alarm sound 8 emitted in front of the speaker 4 interfere with each other to reduce the volume. .

  The above-described embodiment is merely a preferred specific example of the present invention, and the present invention is not limited to the above-described embodiment.

  For example, the detector 2 of the alarm device 1 is not limited to the alarm device 1 that issues a warning when the smoke concentration is detected and this value exceeds a predetermined level in an environment such as a house. The detector 2 may detect physical quantities such as heat and various gases in a residential environment.

  Further, the shapes and materials of the alarm device body 3, the speaker structure 5, and the cover plate 6 are not necessarily limited to the illustrated shapes and materials. Various design changes are possible.

  Furthermore, the shape of the detection unit 2 and the configuration of the detector substrate 2c are not necessarily limited to the illustrated shape and configuration. Various design changes are possible as long as the device detects a physical quantity in the environment.

  And the power supply part 2d of the detector board | substrate 2c is not necessarily what is supplied with electric power from the battery accommodated in the inside. As long as power can be supplied to the control unit 2b, it is possible to use power supplied from a household outlet via an electric cord.

  In addition, it goes without saying that various design changes are possible within the scope of the claims of the present invention.

It is a conceptual diagram which shows the structure of the alarm device which concerns on 1st Embodiment, and has shown the schematic side surface. It is a block diagram which shows the structure of the detector board | substrate of an alarm device. It is a perspective view which shows the structure of the speaker periphery of the alarm device which concerns on 1st Embodiment. It is explanatory drawing which shows the structure of the speaker periphery of the alarm device which concerns on 1st Embodiment, (a) is a side view, (b) has each shown the bottom view. It is a conceptual diagram which shows the structure of the alarm device which concerns on 2nd Embodiment, and has shown the schematic side surface. It is a perspective view which shows the structure of the speaker periphery of the alarm device which concerns on 2nd Embodiment. It is explanatory drawing which shows the structure of the speaker periphery of the alarm device which concerns on 2nd Embodiment, (a) is a side view, (b) is a bottom view, (c) is AA of (b). Cross-sectional views are shown respectively. It is explanatory drawing which shows the conventional alarm device which provided the speaker storage space directly under the alarm device main body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Alarm 2 Detection part 3 Alarm body 4 Speaker 7 Speaker storage space 12 Side shielding wall 13 Sound absorbing member

Claims (2)

An alarm device comprising a detection unit for detecting a physical quantity in the environment, an alarm body incorporating the detection unit, and a speaker that issues an alarm when the physical quantity detected by the detection unit exceeds a predetermined level. And
A speaker storage space for storing the speaker is provided on the side opposite to the installation surface of the alarm body, and the speaker is provided at a position deviated from the center of the speaker storage space in the peripheral direction.
On the side where the speaker is installed in the speaker storage space, a side shield is provided, while on the opposite side facing the side where the speaker is installed, an opening is provided.
An alarm device characterized in that the side shield part is configured to shield the sound generated behind the speaker from entering the front surface of the speaker . The alarm device according to claim 1,
An alarm device further provided with a sound absorbing member between the side shielding portion and the speaker.

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