Audible and visual alarm

Abstract

The utility model relates to an audible and visual alarm in the technical field of fire fighting, which comprises a top cover, a bottom cover, a circuit board and a piezoelectric ceramic piece, the middle part of the piezoelectric ceramic piece is provided with a sound release hole, the surface of a sound amplification cover is provided with a plurality of sound amplification grooves for amplifying the audio vibration frequency, and sound amplification assemblies are arranged in the sound amplification grooves; by additionally arranging the sound amplification assembly and enabling the sound amplification assembly and the sound amplification assembly to be installed in a step shape, when a sound source enters the sound amplification assembly, the vibration frequency of the sound source is increased through the arrangement of one long sound source and one short sound source, optimization of sound transmission is achieved, the vibration frequency of the sound is remarkably enhanced, and due to the increase of the frequency, the loudness of the sound is improved; the sound is clearer and fuller, the sound source transmission range is wider, and the sound amplification effect is achieved; in addition, the sound amplification assembly enables sound sources to be collected before diffusion, so that the prompt tone is more sharp, the sound source propagation range is wider, and the sound amplification effect is effectively achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of fire protection, in particular to an audible and visual alarm device. Background Art

[0002] An audible and visual alarm device, also known as an audible and visual alarm signal, is set to meet special requirements for alarm loudness and installation location. It emits both audible and visual alarm signals simultaneously and is a component product in an industrial alarm system.

[0003] For the existing Chinese patent with the publication number CN214428019U, it discloses an audible and visual alarm device, providing an audible and visual alarm device with low power consumption, long service life, flexible installation, and convenient use. It includes a control module, a sound alarm module, a light alarm module, and a power supply module. The power supply module includes a first electrolytic capacitor, a second electrolytic capacitor, a first capacitor, a second capacitor, a diode, and a first resistor; the positive electrode end of the first electrolytic capacitor, the anode end of the diode, and one end of the first capacitor are all connected to the positive power supply terminal. The cathode end of the diode is connected to one end of the first resistor. The positive electrode of the second electrolytic capacitor and one end of the second capacitor are both connected to the other end of the first resistor. The negative electrode end of the first electrolytic capacitor, the other end of the first capacitor, and the other end of the second capacitor are connected to the negative power supply terminal; the control module is connected to the positive electrode end of the second electrolytic capacitor, and the sound alarm module and the light alarm module are connected to the cathode end of the diode.

[0004] Although this patent has the function of different frequencies of flashing lights of multiple colors and sounds on the same audible and visual alarm device to play an alarm and warning role, and has the effects of low power consumption, long service life, flexible installation, and convenient use, it does not have the function of expanding the penetrative reminder sound. When in a fire scene, due to the commotion of people and the noisy sound of escape, the sound source of the reminder sound itself may be covered up, which may lead to the situation that the areas that cannot cover the sound source cannot receive the reminder. When in use, it is also necessary to process and improve its sound source to expand it and increase its penetrability, resulting in an increase in processes and a reduction in work efficiency. Therefore, the inventor of the present invention proposes an audible and visual alarm device to solve the above-mentioned technical problem of increasing the penetrability of the reminder sound and thus expanding the reminder volume. Summary of the Utility Model

[0005] The utility model aims to overcome the above deficiencies and provides a technical solution that can solve the above problems.

[0006] An acoustic - optical alarm, comprising a top cover, a bottom cover, a circuit board and a piezoelectric ceramic sheet. The structure between the top cover and the bottom cover is detachable. The circuit board and the piezoelectric ceramic sheet are located between the top cover and the bottom cover. The circuit board is electrically connected to the piezoelectric ceramic sheet through a connecting wire. A sound - releasing hole is provided in the middle of the piezoelectric ceramic sheet, and the piezoelectric ceramic sheet and the sound - releasing hole are coaxially arranged. An amplifying cover is provided on the surface of the top cover, and a plurality of sound - amplifying grooves for expanding the audio vibration frequency are provided on the surface of the amplifying cover. An amplifying component is installed inside the sound - amplifying groove;

[0007] The piezoelectric ceramic sheet is a material that works based on the piezoelectric effect. When it is subjected to mechanical pressure, electric charges will be generated at both of its ends; conversely, when a voltage is applied across its two ends, it will generate mechanical deformation. In speakers or headphones, the piezoelectric ceramic sheet usually serves as a driving element to convert electrical signals into mechanical vibrations, thereby generating sound; and the sound - releasing hole, also known as the sound hole or sound outlet, is an integral part of the design of speakers or headphones. Its function is to allow sound waves to be transmitted from the inside of the speaker to the external environment. In a speaker, the sound - releasing hole allows the sound waves generated by the speaker diaphragm to pass through, so as to achieve the purpose of amplifying the sound;

[0008] The working principle is as follows: when an audio signal is input into the speaker, these signals are first converted into electrical signals by the circuit board. The electrical signals are then applied to the piezoelectric ceramic sheet, causing it to deform. This deformation drives the connected diaphragm to vibrate. The vibration of the diaphragm generates sound waves, which are transmitted to the external space through the sound - releasing hole and are finally received by the human ear, thus hearing the sound.

[0009] Furthermore, the amplifying component includes an amplifying plate and a baffle. The inside of the sound - amplifying groove is a sound channel. Both the amplifying plate and the baffle are installed on the inner surface of the sound channel. The length of the amplifying plate is longer than that of the baffle. The amplifying plate and the baffle are installed in a stepped shape. When the sound source enters the sound channel, due to the stepped installation of the amplifying plate and the baffle, the one - long - one - short setting increases the vibration frequency of the sound source, realizing the optimization of sound propagation. The amplifying plate and the baffle form a stepped arrangement inside the sound channel, where the amplifying plate is longer and the baffle is shorter. This design utilizes the difference in length. When sound passes through this structure, due to the stepped layout of the amplifying plate and the baffle, the baffle plays a partial blocking role, disturbing the frequency of the sound source. The longer size of the amplifying plate reflects the frequency disturbed by the baffle, achieving an echo effect. In the narrow interior of the sound - amplifying groove, the vibration frequency of the sound is significantly enhanced. This increase in frequency not only improves the loudness of the sound but also makes the sound clearer and fuller, achieving a wider range of sound source propagation and playing an amplifying effect.

[0010] Furthermore, the sound amplification groove is in an inner eight shape, and one end of the sound amplification groove is a sound amplification port, and the diameter of the sound amplification port is smaller than the diameter of the sound channel. The sound amplification groove in the inner eight shape is used to compress the sound source before it diffuses from the sound amplification port. Since the diameter of the sound amplification port is smaller than the diameter of the sound channel, the sound source is gathered before it diffuses, making the prompt sound appear sharper, so that the range of sound source propagation is wider, achieving the effect of sound amplification; this gathering effect not only enhances the sharpness of the sound source, but also helps to expand the propagation range of the sound source, thereby effectively achieving the sound amplification effect.

[0011] Furthermore, a connection groove is provided on the surface of the bottom cover, which is abutted against one end of the top cover. The connection groove is a concave structure, and the bottom cover is snap-fitted to the top cover. This arrangement improves the stability of the structure. The snap-fit connection is more secure than simple overlap or bonding, and helps to seal, preventing foreign matter such as dust and moisture from entering the interior of the bottom cover and the top cover, thereby protecting internal components. In addition, this structural arrangement allows for quick assembly and disassembly, facilitates maintenance and replacement of parts, and through a precise snap-fit mechanism, ensures the alignment of the top cover and the bottom cover, maintains the consistency of the overall appearance, and facilitates positioning and limiting.

[0012] Furthermore, a magnetic sheet is provided at one end of the bottom cover away from the circuit board and the piezoelectric ceramic sheet, the highest point of the magnetic sheet is flush with the bottom surface of the bottom cover, the magnetic sheet is rectangular, and the magnetic sheet is installed at both ends of the bottom cover in a symmetrical structure;

[0013] The magnetic sheets are symmetrically installed at both ends of the bottom cover. This design can ensure that the bottom cover can form a certain stability and balance when it is adsorbed to the metal surface. Since the highest point of the magnetic sheet is flush with the bottom surface of the bottom cover, this helps the bottom cover to fit closely to the metal surface during adsorption, thereby increasing the adsorption force. The rectangular design makes the magnetic sheets evenly distributed at both ends of the bottom cover, further enhancing the overall adsorption effect of the bottom cover. The use of this distribution design not only improves the adsorption performance of the bottom cover, but also ensures safety and reliability during use.

[0014] Furthermore, the outer side of the top cover is provided with a plurality of reflective tapes for increasing the visual recognition effect, the reflective tapes are linearly arranged on the outer side of the top cover, and the distance between two adjacent reflective tapes is equal;

[0015] The reflective tape can provide a consistent visual effect, allowing the top cover to evenly reflect light under light, thereby enhancing the visibility of the top cover. This uniform reflective effect helps to improve the safety and recognition of the product, especially in a dimly lit environment or when used at night. It can effectively remind passers-by and reduce the occurrence of accidents. In addition, when a fire occurs, the reflective tape can reflect the bright light generated by the fire, which plays a role in guiding and increasing the visual recognition effect.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows: By adding an amplifying component and installing the two in a stepped shape, when the sound source enters the amplifying component, the one-long-one-short setting increases the vibration frequency of the sound source, realizing the optimization of sound propagation, significantly enhancing the vibration frequency of the sound. This increase in frequency not only improves the loudness of the sound but also makes the sound clearer and fuller, achieving a wider range of sound source propagation and having an amplifying effect.

[0017] In addition, the amplifying component causes the sound source to converge before diffusion, making the prompt sound appear sharper, achieving a wider range of sound source propagation and having an amplifying effect. This converging effect not only enhances the sharpness of the sound source but also helps to expand the propagation range of the sound source, thus effectively realizing the amplifying effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a perspective view of an acoustic-optic alarm;

[0019] Figure 2 is another perspective view of an acoustic-optic alarm;

[0020] Figure 3 is an internal structure diagram of an acoustic-optic alarm;

[0021] Figure 4 is a rear view of an acoustic-optic alarm;

[0022] Figure 5 is a structure diagram of the amplifying component in an acoustic-optic alarm;

[0023] Figure 6 is a sound amplification principle diagram of the amplifying component in an acoustic-optic alarm;

[0024] In the figure: top cover - 1, bottom cover - 2, circuit board - 3, piezoelectric ceramic sheet - 4, connecting wire - 5, sound release hole - 6, amplifying cover - 7, amplifying groove - 8, amplifying board - 9, baffle - 10, sound channel - 11, amplifying port - 12, connecting groove - 13, magnetic attraction sheet - 14, reflective tape - 15. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following further describes the present utility model in detail in conjunction with the drawings and specific embodiments.

[0026] In this embodiment, please refer to Figures 1 - 6, an acoustic - optical alarm implemented specifically, includes a top cover 1, a bottom cover 2, a circuit board 3, and a piezoelectric ceramic sheet 4. The structure between the top cover 1 and the bottom cover 2 is detachable. The circuit board 3 and the piezoelectric ceramic sheet 4 are located between the top cover 1 and the bottom cover 2. The circuit board 3 is electrically connected to the piezoelectric ceramic sheet 4 through a connecting wire 5. There is a sound - releasing hole 6 in the middle of the piezoelectric ceramic sheet 4, and the piezoelectric ceramic sheet 4 and the sound - releasing hole 6 are coaxially arranged. There is an amplifying cover 7 on the surface of the top cover 1, and a number of sound - amplifying grooves 8 for expanding the audio vibration frequency are opened on the surface of the amplifying cover 7. An amplifying component is installed inside the sound - amplifying groove 8;

[0027] The piezoelectric ceramic sheet 4 is a material that works based on the piezoelectric effect. When it is subjected to mechanical pressure, electric charges will be generated at both of its ends; conversely, when a voltage is applied across its ends, it will undergo mechanical deformation. In speakers or headphones, the piezoelectric ceramic sheet 4 usually serves as a driving element, converting electrical signals into mechanical vibrations to generate sound. The sound - releasing hole 6, also known as the sound hole or sound outlet, is an integral part of the speaker or headphone design. Its function is to allow sound waves to be transmitted from the inside of the speaker to the external environment. In a speaker, the sound - releasing hole 6 allows the sound waves generated by the speaker diaphragm to pass through to achieve the purpose of amplifying the sound;

[0028] The working principle is as follows: When an audio signal is input into the speaker, these signals are first converted into electrical signals by the circuit board 3. The electrical signals are then applied to the piezoelectric ceramic sheet 4, causing it to deform. This deformation drives the connected diaphragm to vibrate. The vibration of the diaphragm generates sound waves, which are transmitted to the external space through the sound - releasing hole 6 and are finally received by a person's ear, thus hearing the sound.

[0029] The amplifying component includes an amplifying plate 9 and a baffle 10. The inside of the sound - amplifying groove 8 is a sound channel 11. Both the amplifying plate 9 and the baffle 10 are installed on the inner surface of the sound channel 11. The length of the amplifying plate 9 is longer than that of the baffle 10. The amplifying plate 9 and the baffle 10 are installed in a stepped shape. When the sound source enters the sound channel 11, due to the stepped installation of the amplifying plate 9 and the baffle 10, the one - long - one - short setting increases the vibration frequency of the sound source, realizing the optimization of sound propagation. The amplifying plate 9 and the baffle 10 form a stepped arrangement inside the sound channel 11, where the amplifying plate 9 is longer and the baffle 10 is shorter. This design utilizes the difference in length. When sound passes through this structure, due to the stepped layout of the amplifying plate 9 and the baffle 10, the baffle 10 plays a partial blocking role, disturbing the frequency of the sound source. The longer size of the amplifying plate 9 reflects the frequency of the sound source disturbed by the baffle 10, achieving an echo effect. In the narrow interior of the sound - amplifying groove 8, the vibration frequency of the sound is significantly enhanced. This increase in frequency not only improves the loudness of the sound but also makes the sound clearer and fuller, achieving a wider range of sound source propagation and an amplifying effect.

[0030] The sound amplification groove 8 is in an inward V shape. One end of the sound amplification groove 8 is a sound amplification opening 12, and the diameter of the sound amplification opening 12 is smaller than that of the sound channel 11. With the inward V-shaped sound amplification groove 8, the sound source is compressed before it diffuses from the sound amplification opening 12. Since the diameter of the sound amplification opening 12 is smaller than that of the sound channel 11, it causes the sound source to converge before diffusion, making the prompt sound appear sharper, achieving a wider range of sound source propagation and playing a sound amplification effect. This convergence effect not only enhances the sharpness of the sound source but also helps to expand the propagation range of the sound source, thus effectively achieving the sound amplification effect.

[0031] A connection groove 13 for abutting against one end of the top cover 1 is provided on the surface of the bottom cover 2. The connection groove 13 is in a concave structure, and the bottom cover 2 and the top cover 1 are snap-connected. This setting improves the structural stability. The snap connection is more firm than simple lapping or bonding and helps with sealing to prevent foreign matters such as dust and moisture from entering the interiors of the bottom cover 2 and the top cover 1, protecting the internal components. In addition, this structural setting enables quick assembly and disassembly, facilitating maintenance and component replacement. Through an accurate snap mechanism, the alignment of the top cover 1 and the bottom cover 2 can be ensured, maintaining the consistency of the overall appearance and facilitating positioning and limiting functions.

[0032] A magnetic attraction sheet 14 is provided at one end of the bottom cover 2 away from the circuit board 3 and the piezoelectric ceramic sheet 4. The highest point of the magnetic attraction sheet 14 is flush with the bottom surface of the bottom cover 2. The magnetic attraction sheet 14 is rectangular and is installed at both ends of the bottom cover 2 and has a symmetric structure.

[0033] The symmetric installation of the magnetic attraction sheet 14 at both ends of the bottom cover 2 can ensure a certain stability and balance when the bottom cover 2 is adsorbed to a metal surface. Since the highest point of the magnetic attraction sheet 14 is flush with the bottom surface of the bottom cover 2, this helps the bottom cover 2 to closely fit the metal surface during adsorption, thereby increasing the adsorption force. The rectangular design makes the distribution of the magnetic attraction sheet 14 uniform at both ends of the bottom cover 2, further enhancing the overall adsorption effect of the bottom cover 2. Adopting this distribution design not only improves the adsorption performance of the bottom cover 2 but also ensures safety and reliability during use.

[0034] A plurality of reflective bands 15 for enhancing the visual recognition effect are provided on the outer side surface of the top cover 1. The reflective bands 15 are linearly arranged on the outer side surface of the top cover 1, and the distance between adjacent reflective bands 15 is equal.

[0035] The reflective tape 15 can provide a consistent visual effect, enabling the top cover 1 to evenly reflect light under light irradiation, thereby enhancing the visibility of the top cover 1. This uniform reflective effect helps improve the safety and recognition of the product. Especially in dim light environments or when used at night, it can effectively alert passing personnel and reduce accidents. In addition, during a fire, since the reflective tape 15 can reflect the bright light generated by the firelight irradiation, it plays a role in guiding and enhancing the visual recognition effect.

[0036] The design key point of the present utility model lies in: by adding an amplifying plate 9 and a baffle 10 and installing them in a stepped shape. When the sound source enters the sound channel 11, the one-long-one-short setting increases the vibration frequency of the sound source, achieving the optimization of sound propagation. The amplifying plate 9 and the baffle 10 are arranged in a stepped shape inside the sound channel 11, where the amplifying plate 9 is longer and the baffle 10 is shorter. This design utilizes the difference in length. When sound passes through this structure, due to the stepped layout of the amplifying plate 9 and the baffle 10, the baffle 10 plays a partial blocking role, disturbing the frequency of the sound source. The longer size of the amplifying plate 9 reflects the frequency of the sound source disturbed by the baffle 10, achieving an echo effect. In the narrow interior of the amplifying groove 8, the vibration frequency of the sound is significantly enhanced. This increase in frequency not only improves the loudness of the sound but also makes the sound clearer and fuller, enabling the sound source to spread over a wider range and achieving an amplifying effect.

[0037] In addition, by adopting an inwardly concave amplifying groove 8, the sound source is compressed before spreading from the amplifying opening 12. Since the diameter of the amplifying opening 12 is smaller than the diameter of the sound channel 11, it plays a role in converging the sound source before spreading, making the warning sound appear sharper, enabling the sound source to spread over a wider range and achieving an amplifying effect. This converging effect not only enhances the sharpness of the sound source but also helps expand the propagation range of the sound source, thus effectively achieving the amplifying effect.

[0038] The above content is a further detailed description of the present utility model in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model belongs, without departing from the concept of the present utility model, several simple deductions or substitutions can still be made, which should all be regarded as the protection scope of the present utility model.

Claims

1. An acoustic-optic alarm, comprising a top cover, a bottom cover, a circuit board and a piezoelectric ceramic sheet, characterized in that: The structure between the top cover and the bottom cover is detachable. The circuit board and the piezoelectric ceramic sheet are located between the top cover and the bottom cover. The circuit board is electrically connected to the piezoelectric ceramic sheet through a connecting wire. An acoustic release hole is provided in the middle of the piezoelectric ceramic sheet, and the piezoelectric ceramic sheet and the acoustic release hole are coaxially arranged. An amplifying cover is provided on the surface of the top cover, and a plurality of sound amplifying grooves for expanding the audio vibration frequency are provided on the surface of the amplifying cover. A sound amplifying component is installed inside the sound amplifying groove.

2. The acoustic-optic alarm according to claim 1, wherein: The sound amplifying component includes a sound amplifying plate and a baffle. The inside of the sound amplifying groove is a sound channel. The sound amplifying plate and the baffle are both installed on the inner surface of the sound channel. The length of the sound amplifying plate is longer than that of the baffle, and the sound amplifying plate and the baffle are installed in a stepped shape.

3. The sound and light alarm according to claim 2, characterized in that: The sound amplifying groove is in an inner eight shape. One end of the sound amplifying groove is a sound amplifying opening, and the diameter of the sound amplifying opening is smaller than the diameter of the sound channel.

4. An acoustic-optic alarm according to any one of claims 1-3, characterized in that: A connecting groove for abutting against one end of the top cover is provided on the surface of the bottom cover. The connecting groove is in a concave structure, and the bottom cover and the top cover are snap-connected.

5. An acoustic-optic alarm according to any one of claims 1 to 3, characterized in that: A magnetic attraction sheet is provided at one end of the bottom cover away from the circuit board and the piezoelectric ceramic sheet. The highest point of the magnetic attraction sheet is flush with the bottom surface of the bottom cover. The magnetic attraction sheet is rectangular, and the magnetic attraction sheet is installed at both ends of the bottom cover and is a symmetric structure.

6. An acoustic-optical alarm according to any one of claims 1-3, characterized in that: A plurality of reflective bands for enhancing the visual recognition effect are provided on the outer side surface of the top cover. The reflective bands are linearly arranged on the outer side surface of the top cover, and the distance between adjacent reflective bands is equal.

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