CN113674726B - Buzzer device - Google Patents
Buzzer device Download PDFInfo
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- CN113674726B CN113674726B CN202110520731.9A CN202110520731A CN113674726B CN 113674726 B CN113674726 B CN 113674726B CN 202110520731 A CN202110520731 A CN 202110520731A CN 113674726 B CN113674726 B CN 113674726B
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- resonance chamber
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- peripheral surface
- sound reproducing
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 238000007599 discharging Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 3
- 230000036544 posture Effects 0.000 description 15
- 230000008878 coupling Effects 0.000 description 7
- 238000010168 coupling process Methods 0.000 description 7
- 238000005859 coupling reaction Methods 0.000 description 7
- 210000000078 claw Anatomy 0.000 description 6
- 238000004891 communication Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000007257 malfunction Effects 0.000 description 2
- 229920001875 Ebonite Polymers 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000005476 size effect Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
- G10K9/122—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using piezoelectric driving means
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/18—Details, e.g. bulbs, pumps, pistons, switches or casings
- G10K9/22—Mountings; Casings
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
Abstract
The invention provides a buzzer device, wherein a sound-playing and water-draining hole is arranged on a shell which is formed into a cylinder hole shape, even if the installation angle of the shell on a supporting body is deviated, water flowing down to the lowest part of the peripheral surface along the peripheral surface of the resonance chamber can be smoothly drained from the sound-playing and water-draining hole, and the sound-playing performance of the sound-playing and water-draining hole is restrained from being reduced. In a buzzer device (B) in which sound emission and drainage holes (H1-H3) are provided in a casing (10), a resonance chamber (C) disposed in the casing (10) together with a piezoelectric buzzer (30) is formed in a substantially cylindrical hole shape, an edge (21) of the sound emission and drainage holes (H1-H3) on the outer side in the resonance chamber radial direction is adjacent to the peripheral surface (11 ki) of the resonance chamber (C) in the resonance chamber axial direction, and the edge (21) is formed to extend along the peripheral surface (11 ki), and the sound emission and drainage holes (H1-H3) are formed to have a size surrounding a circle having a diameter of 5mm or more.
Description
Technical Field
The present invention relates to a buzzer device, and more particularly to a buzzer device of the following type: a resonance chamber and a piezoelectric buzzer with a diaphragm facing the resonance chamber are disposed in a housing, and a sound emission hole for emitting sound from the piezoelectric buzzer is provided in the housing.
Background
Patent document 1 discloses a technique in which a drain hole is provided in a casing having a sound emission hole, separately from the sound emission hole, in the buzzer device. Patent document 2 discloses a technique in which a sound reproducing/draining hole serving as both a sound reproducing hole and a draining hole is provided in a casing.
Prior art literature
Patent document 1: japanese laid-open patent publication No. 57-93999
Patent document 2: japanese unexamined patent publication No. 55-129854
Disclosure of Invention
Problems to be solved by the invention
In the case of a buzzer device of patent document 1 in which a drain hole is provided separately from a sound emission hole, the resonance frequency in the resonance chamber changes with the increase of the drain hole, and the sound pressure decreases.
In order to solve this problem, it is considered to form the sound emission hole and the drain hole to have small diameters, but in this case, there is a possibility that drainage performance of the drain hole is lowered or a water film formed by surface tension spreads on the inner surface of the hole due to the small diameter, and there are other disadvantages such as lowering of sound emission performance due to the water film or failure of the piezoelectric buzzer as an electronic component due to water remaining in the case.
In the conventional structure in which the sound reproducing/draining hole serving as both the sound reproducing hole and the draining hole is provided in the casing as in patent document 2, the sound reproducing/draining hole is a circular hole and is disposed so as to contact the peripheral surface of the resonance chamber. Therefore, when the assembly angle of the casing to the support body (for example, a vehicle body or the like) to which the buzzer device is to be assembled is deviated, the communication portion between the sound emission and drainage hole and the resonance chamber peripheral surface is deviated from the lowermost portion of the resonance chamber peripheral surface, and therefore, water flowing down along the resonance chamber peripheral surface to the lowermost portion of the peripheral surface may not be smoothly discharged from the sound emission and drainage hole.
In addition, if the sound emission/drainage hole is small in diameter in the member of patent document 2, a problem due to a water film may occur similarly to the structure of patent document 1.
The present invention has been made in view of the above circumstances, and an object thereof is to provide a buzzer device capable of solving the above-described problems of the conventional structure with a simple structure.
Means for solving the problems
In order to achieve the above object, the present invention provides a buzzer device in which a resonance chamber and a piezoelectric buzzer having a vibrating plate facing the resonance chamber are disposed in a case, wherein a sound emission/drainage hole for emitting sound from the piezoelectric buzzer and draining water from the resonance chamber is provided in the case, and wherein the resonance chamber is formed in a substantially cylindrical hole shape, an edge portion of the sound emission/drainage hole on an outer side in a radial direction of the resonance chamber is adjacent to a peripheral surface of the resonance chamber in a radial direction of the resonance chamber, the edge portion is formed to extend along the peripheral surface, and the sound emission/drainage hole is formed in a size of a circle having a diameter of 5 mm or more.
In addition to the feature 1, the invention is characterized in that the sound reproducing and draining hole is formed so that the edge portion on one side and the edge portion on the other side in the circumferential direction of the resonance chamber are opened so as to gradually separate outward in the radial direction of the resonance chamber, and so that the sound reproducing and draining hole is line-symmetrical with respect to a bisector in the circumferential direction of the resonance chamber.
In addition to the feature 2, the invention is characterized in that, in the 3 rd feature, an edge portion of the sound reproducing/draining hole on one side and an edge portion of the sound reproducing/draining hole on the other side in the circumferential direction of the resonance chamber are opened 20 ° with respect to the bisector, respectively.
In addition to any one of the features 1 to 3, the invention is characterized in that the sound reproducing/draining hole is provided in plural numbers and is arranged at a distance from each other in the circumferential direction of the resonance chamber.
In addition to any one of the features 1 to 4, the feature 5 of the present invention is that in the resonance chamber circumferential direction, the width of the outer edge portion of the sound emission/drainage hole in the resonance chamber radial direction is larger than the width of the inner edge portion.
In addition to any one of the features 1 to 5, in the present invention, in a 6 th feature, a front surface of the sound reproducing/draining hole opening in the case has a low-level surface portion connected to an outer edge portion of the sound reproducing/draining hole in a radial direction of the resonance chamber and a high-level surface portion connected to another edge portion of the sound reproducing/draining hole, and a step portion formed between the low-level surface portion and the high-level surface portion extends from both ends of the outer edge portion to one side of the edge portion of the sound reproducing/draining hole on one side and one side of the edge portion on the other side of the sound reproducing/draining hole on the circumferential direction of the resonance chamber.
In addition to any one of the features 1 to 6, the feature 7 of the present invention is that the peripheral surface of the resonance chamber is formed as a tapered surface gradually expanding toward the front surface side of the housing.
Effects of the invention
According to feature 1, in the buzzer device in which the sound emitting and draining hole is formed in the case in which the resonance chamber is formed in a substantially cylindrical hole shape, the sound emitting and draining hole is formed in a size surrounding a circle having a diameter of 5mm or more, and therefore, not only can the opening area of the hole be sufficiently ensured, good drainage can be exhibited, but also the water film can be effectively suppressed from being stretched on the inner surface of the hole, and deterioration in sound emitting performance due to the water film can be prevented. In addition, since the outer edge portion of the sound emission/drainage hole in the radial direction of the resonance chamber is adjacent to the circumferential surface of the resonance chamber in the axial direction of the resonance chamber and extends along the circumferential surface, the communication portion between the sound emission/drainage hole and the circumferential surface of the resonance chamber extends in the circumferential direction by the outer edge portion along the circumferential surface of the resonance chamber, and therefore, even when the mounting angle of the casing to the support body to which the buzzer device is to be mounted varies, the outer edge portion of the sound emission/drainage hole can be exposed to the lowermost portion of the circumferential surface of the resonance chamber, and therefore, water flowing down to the lowermost portion of the circumferential surface along the circumferential surface of the resonance chamber can be smoothly discharged from the sound emission/drainage hole. The effect of extending the outer edge of the sound emission/drainage hole along the peripheral surface of the resonance chamber is complementary to the dimension effect of sufficiently securing the opening area, and good and smooth drainage can be obtained without being affected by the deviation of the installation angle, so that water is less likely to remain in the casing, and the occurrence of malfunction of the buzzer device can be suppressed.
Further, according to the feature 2, the edge portion on one side and the edge portion on the other side in the resonance chamber circumferential direction of the sound reproducing/draining hole are opened so as to gradually separate as approaching the outside in the resonance chamber radial direction, and are formed so as to be line-symmetrical with respect to the bisector in the resonance chamber circumferential direction of the sound reproducing/draining hole, and therefore even when the mounting angle of the housing with respect to the support body deviates in one direction or the other from the normal mounting angle, smooth drainage of the sound reproducing/draining hole can be ensured without being affected by the same.
Further, according to the 3 rd feature, since the edge portion on one side and the edge portion on the other side of the sound emission/drainage hole in the circumferential direction of the resonance chamber are each opened 20 ° with respect to the bisector, even when the mounting angle of the housing with respect to the support body is deviated in one direction or the other from the normal mounting angle, if the deviation is 20 ° or less, smooth drainage of the sound emission/drainage hole can be ensured without being affected by the deviation.
Further, according to the 4 th feature, since the plurality of sound emission/drain holes are provided and are arranged at intervals in the circumferential direction of the resonance chamber, it is possible to drain water regardless of which sound emission/drain hole is arranged at the lowermost portion of the circumferential surface of the resonance chamber, and therefore the degree of freedom in the mounting position of the housing with respect to the support plate is improved.
Further, according to the 5 th feature, since the width of the outer edge portion of the sound emission/drainage hole in the resonance chamber radial direction is larger than the width of the inner edge portion, the communication portion between the sound emission/drainage hole and the resonance chamber peripheral surface can be expanded in the circumferential direction without increasing the opening area of each sound emission/drainage hole, and water flowing down along the resonance chamber peripheral surface can be discharged from the sound emission/drainage hole more efficiently and smoothly.
In addition, according to the 6 th feature, the front surface of the sound reproducing/draining hole opening in the casing has a low-level surface portion connected to the outer edge portion of the sound reproducing/draining hole in the radial direction of the resonance chamber, and a high-level surface portion connected to the other edge portion of the sound reproducing/draining hole, and the stepped portion formed between these low-level surface portion and high-level surface portion extends from both ends of the outer edge portion to one side of the edge portion and the other side edge portion, respectively, apart from the one side edge portion in the circumferential direction of the resonance chamber of the sound reproducing/draining hole, so that water reaching the front surface side of the casing from the sound reproducing/draining hole can smoothly flow out along the stepped portion by the surface tension, and the drainage property of the sound reproducing/draining hole can be further improved.
Further, according to the 7 th feature, since the peripheral surface of the resonance chamber is formed as a tapered surface gradually expanding in diameter toward the front surface side of the casing, water descending along the peripheral surface smoothly flows to the lowermost front end of the peripheral surface by the slope of the tapered surface, and can flow out of the casing from the sound emission/drainage hole opened therein. This makes it possible to drain water from the resonance chamber more reliably.
Drawings
Fig. 1 is an overall perspective view of a buzzer device according to an embodiment of the present invention, as viewed from below the front face.
Fig. 2 is a front view of the buzzer device (a view in the direction of arrow 2 in fig. 1).
Fig. 3 is an enlarged cross-sectional view taken along line 3-3 of fig. 2.
Fig. 4 is an enlarged cross-sectional view taken along line 4-4 of fig. 2.
Fig. 5 is a partially cut-away perspective view (view in the direction of arrow 5 in fig. 3) of the buzzer device mounted to the support plate, viewed obliquely from the rear.
Fig. 6 is an exploded perspective view of the buzzer device.
Fig. 7 is an explanatory view showing an example of the flow of water which descends along the peripheral surface of the resonance chamber and reaches the sound emission/drainage hole (an enlarged cross-sectional view along the direction of arrow 7 in fig. 4).
Fig. 8 is an explanatory view (enlarged cross-sectional view along arrow 8 in fig. 2) showing an example of the flow of water from the resonance chamber and from the sound emission/drainage hole to the front side of the casing.
In fig. 9, (a) is a front view of the buzzer device in a vertical mounting posture, (B) is a front view of the buzzer device in a horizontal mounting posture on one side of the left and right, and (C) is a front view of the buzzer device in a horizontal mounting posture on the other side of the left and right.
Description of the reference numerals
B: a buzzer device;
c: a resonance chamber;
H1-H3: 1 st to 3 rd playback and drain holes as playback and drain holes;
10: a housing;
11ki: an inner peripheral surface of the resonance chamber forming wall portion as a peripheral surface;
15: a front face of the housing cover as a housing front face;
15h: a high-level face on the front of the shell;
15l: a lower face on the front of the shell;
15s: a step part on the front surface of the shell;
21: a rim portion of the sound reproducing and draining hole on the outer side in the radial direction of the resonance chamber;
22: a rim portion of the sound reproducing and draining hole on one side in the circumferential direction of the resonance chamber;
23: a rim portion of the sound reproducing and draining hole on the other side of the resonance chamber in the circumferential direction;
24: an edge portion of the sound reproduction and drainage hole on the inner side in the radial direction of the resonance chamber;
30: a piezoelectric buzzer;
31: and a vibration plate.
Detailed Description
Embodiments of the present invention will be described below with reference to the drawings.
First, in fig. 1 to 4, a buzzer device B for giving an alarm (for example, an alarm at the time of left turn, an alarm at the time of reverse, or the like) to a person or driver outside the vehicle according to a driving condition is mounted at an appropriate portion of the vehicle body of the vehicle.
The buzzer device B includes: a housing 10 made of synthetic resin; a resonance chamber C formed so as to be partitioned in the casing 10; a piezoelectric buzzer 30 having a diaphragm 31 facing the resonance chamber C; and sound emission and drainage holes H1 to H3 provided in the casing 10 and used for both emitting sound from the piezoelectric buzzer 30 and draining water from the resonance chamber C. In particular, the sound reproducing and draining holes H1 to H3 of the embodiment have a plurality of holes and are arranged at intervals in the circumferential direction of the resonance chamber C.
The case 10 is configured by a case body 11 and a case-shaped case cover 12, the case body 11 is formed in a hollow case shape, and the case cover 12 is fitted to the case body 11 so as to cover a surface of the case body 11 other than the lower surface.
A plurality of coupling mechanisms 13 for detachably coupling the housing main body 11 and the housing cover 12 are provided between the fitting surfaces, and each coupling mechanism 13 includes: a plurality of locking holes 12a provided on one of the fitting surfaces (in the example shown in the figure, the housing cover 12); and a plurality of locking claws 11t protruding from the other (the housing body 11 in the illustrated example) and locked to the plurality of locking holes 12a so as to be able to be engaged with and disengaged from each other. The coupling means between the housing body 11 and the housing cover 12 is not limited to the coupling mechanism 13 of the embodiment, and for example, coupling means such as screw fastening, caulking, and pin fastening may be performed.
A jig 40 is selectively and detachably attached to a plurality of specific outer surfaces (for example, left and right side surfaces and a back surface) of the housing cover 12, and the jig 40 is used for attaching and fixing the housing 10 to a support body that supports the buzzer device B, for example, to a support plate F that is fixed to a vehicle body. The clamp 40 is formed of an elastic material (e.g., hard rubber). The jig 40 may be directly attached to the plate-like portion of the vehicle body without the support plate F, and in this case, the vehicle body may be a support body.
Next, the mounting structure of the jig 40 will be described. A pair of support rails 12r extending in the vertical direction and parallel to each other are provided on a plurality of specific outer surfaces (for example, the left and right side surfaces and the back surface) of the housing cover 12, and the upper ends of the two support rails 12r are coupled to each other by a coupling frame 12s serving as a sliding stopper for the clip 40. On the other hand, the clip 40 has a base 41, and the base 41 integrally has a supported portion 41b on the back surface thereof, which is slidably supported between the pair of support rails 12 r. The 1 st and 2 nd locking projections 41bt and 12t that can be engaged with and disengaged from each other are formed on the opposite surface between the rear surface of the base 41 (i.e., the supported portion 41 b) and the specific outer surface of the housing cover 12.
Therefore, the engagement projections 41bt and 12t are engaged with each other and the upper end of the supported portion 41b is engaged with the connecting frame 12s, whereby the base 41 (and thus the clip 40) can be fixed at a fixed position on the support rail 12 r.
In the attached state of the clamp 40 to the support plate F, the base distal end portion 41a rising in a tapered shape from the surface of the base 41 is disposed so as to face the support plate F via the buffer 43. Further, a pillar portion 45 is provided to protrude from a central portion of the front surface of the base 41, the pillar portion 45 extends outward through a central hole 43h of the damper body 43, and a pair of elastic locking claws 45t are integrally provided at distal end portions of the pillar portion 45, and distal end portions of the pair of elastic locking claws 45t are engageable with the central hole 43h of the damper body 43. An engagement protrusion 45tk is provided on an outer surface of an intermediate portion of the two elastic engagement claws 45t, and the engagement protrusion 45tk is elastically engaged with an edge portion of the engagement hole Fh of the support plate F, and the edge portion of the engagement hole Fh is sandwiched and fixed between the engagement protrusion 45tk and the buffer body 43.
When the clip 40 attached to the housing 10 is attached to the support plate F, the buffer 43 is temporarily fixed to the clip 40 in advance between the base distal end portion 41a and the elastic locking claw 45 t. From this state, if the elastic locking claw 41t of the clip 40 is pushed into the locking hole Fh of the support plate F, the clip 40 can be attached to the support plate F as shown in fig. 4. In this way, the clamp 40 (and thus the housing 10) can be fixed to the support plate F and thus to the vehicle body.
Next, the structure of the housing main body 11 will be described more specifically. The housing main body 11 includes: a box-shaped main body main portion 11m, the front side of which is open; a substantially cylindrical resonance chamber forming wall portion 11k integrally coupled to an inner surface of the housing main body main portion 11 m; and reinforcing ribs 11a integrally connecting the resonance chamber forming wall 11k and the bottom wall of the housing main body 11m, and integrally connecting the connector 11c to the bottom surface of the housing main body 11 m.
The inner space of the resonance chamber formation wall 11k constitutes the resonance chamber C. The inner peripheral surface of the resonance chamber forming wall 11k of the embodiment is formed in a tapered shape that gradually expands in diameter toward the front side, and the tapered inner peripheral surface constitutes the peripheral surface 11ki of the resonance chamber C. By the slope of the taper, water that has entered the peripheral surface 11ki of the resonance chamber C smoothly flows down to the front side of the casing 10.
An outer peripheral portion of the piezoelectric buzzer 30 is attached to an open rear end of the resonance chamber formation wall portion 11k so as to be closed. The piezoelectric buzzer 30 includes a diaphragm 31 and a piezoelectric element 32, the diaphragm 31 having a disk shape and an outer peripheral portion fixed to the resonance chamber formation wall portion 11k, and the piezoelectric element 32 being joined to a central portion of the diaphragm 31.
A pair of terminals 34 and 35 are fixed to the rear surface of the case main body main portion 11m, and one ends of the pair of terminals 34 and 35 are connected to the vibration plate 31 and the piezoelectric element 32 via leads. The two terminals 34 and 35 are connected via a resistor 36, and the other ends of the terminals 34 and 35 extend downward and are exposed into the connector portion 11c, and the exposed portions constitute connector terminal portions that can be connected to external wires. The connector terminal portion is connected to an electronic control device, not shown, via an external wiring.
The front wall portion of the housing cover 12 is disposed adjacent to the resonance-chamber formation wall portion 11k so as to block most of the front surface of the resonance chamber C. The front surface 15, which is the front surface of the housing cover 12, is provided with: a1 st sound reproducing and draining hole H1 which is at the lowest position in a state where the casing 10 is arranged vertically (see fig. 9 (a)); a2 nd playback and drain hole H2 that is at the lowest position in a state where the casing 10 is disposed horizontally on the left and right sides (see fig. 9 (B)); and a3 rd sound reproducing and draining hole H3 which is at the lowest position in a state where the casing 10 is horizontally arranged on the other side (see fig. 9 (C)).
The rim 21 on the outer side of each of the sound reproducing and draining holes H1 to H3 in the resonance chamber radial direction is adjacent to the peripheral surface 11ki of the resonance chamber C in the resonance chamber axial direction, and the rim 21 is formed to extend along the circumferential direction of the peripheral surface 11ki (in the embodiment, circular arc shape). The sound reproducing and draining holes H1 to H3 are formed to have a size surrounding an imaginary circle X having a diameter of 5mm or more.
In the present embodiment, a tapered small chamfer 11 kc is formed at the outer end edge of the peripheral surface 11ki of the resonance chamber C, and the peripheral surface 11ki of the resonance chamber C and the edge 21 are connected via a small stepped surface corresponding to the chamfer 11 kc. The chamfer 11 kc may be omitted.
The edge 22 on one side and the edge 23 on the other side in the circumferential direction of the resonance chamber of each of the sound reproducing and draining holes H1 to H3 are opened so as to gradually separate as they come to the outside in the radial direction of the resonance chamber, and are formed so as to be line-symmetrical with respect to the bisector L in the circumferential direction of the resonance chamber of each of the sound reproducing and draining holes H1 to H3.
In particular, in the present embodiment, as is clear from fig. 8, the edge 22 on one side and the edge 23 on the other side in the resonance chamber circumferential direction of the sound emission and drainage holes H1 to H3 are each opened 20 ° with respect to the bisector L which passes through the central axis of the resonance chamber C (and thus the diaphragm 31) and bisects the sound emission and drainage holes H1 to H3 in the resonance chamber circumferential direction.
The outer edge 21 of each of the sound emission and drainage holes H1 to H3 in the resonance chamber radial direction is formed to have a width larger than that of the inner edge 24 in the resonance chamber circumferential direction. In the embodiment, the inner edge 24 is formed in a mountain shape that is higher toward the inner middle in the resonance chamber radial direction, and thus the respective sound emission/drainage holes H1 to H3 can have the following hole shapes: the size of the virtual circle X having a diameter of 5 mm or more is formed as described above, and the opening area of the hole can be suppressed as much as possible.
The front surface 15 of the casing 10 (more specifically, the casing cover 12) having the sound emission and drainage holes H1 to H3 is provided with a low-level surface 15l and a high-level surface 15H, the low-level surface 15l being connected to the rim 21 of the sound emission and drainage holes H1 to H3 on the outer side in the resonance chamber radial direction, and the high-level surface 15H being connected to the other rims 22 to 24. The stepped portion 15s formed between the lower surface portion 15l and the upper surface portion 15H extends from both ends of the outer edge portion 21 to one side (in other words, linearly along the extension line of each edge portion 22, 23) of the edge portion 22 on one side and the edge portion 23 on the other side in the resonance chamber circumferential direction, which are separated from the sound reproducing/draining holes H1 to H3, respectively.
Next, the operation of the embodiment will be described.
When an electric signal is transmitted from an electronic control device, not shown, to the piezoelectric buzzer 30, the buzzer device B generates an alarm sound by the vibration of the vibration plate 31 that is linked to the piezoelectric element 32, and the alarm sound is amplified by the resonance chamber C and is emitted from the 1 st to 3 rd sound emission/drainage holes H1 to H3.
Further, the jig 40 for attaching the housing 10 of the buzzer device B to the support plate F as a support body can select a plurality of mounting postures of the housing 10 with respect to the support plate F by selectively attaching it to any one of a plurality of specific outer surfaces (left and right side surfaces and back surfaces in the embodiment) of the housing 10 (more specifically, the housing cover 12). That is, as illustrated in (a) to (C) of fig. 9, any one of the vertical mounting posture in which the 1 st sound reproducing and draining hole H1 is located at the position facing the lowermost portion of the resonance chamber C, the 1 st horizontal mounting posture in which the 2 nd sound reproducing and draining hole H2 is located at the position facing the lowermost portion of the resonance chamber C, and the 2 nd horizontal mounting posture in which the 3 rd sound reproducing and draining hole H3 is located at the position facing the lowermost portion of the resonance chamber C can be selected.
In the buzzer device B, rainwater, dew condensation water, or the like may enter and remain in the casing 10, in particular, the resonance chamber C, and in this case, any one of the 1 st to 3 rd sound emission and drainage holes H1 to H3 (particularly, the sound emission and drainage hole located at the lowermost position) is used as a drainage hole in order to drain water to the outside. For example, when the housing 10 is in the vertical mounting posture, the 1 st sound reproducing and draining hole H1 located at the lowermost position serves as a draining hole, and is drained therefrom. When the housing 10 is in a horizontal mounting posture on one side or the other side, the 2 nd sound reproducing and draining hole H2 or the 3 rd sound reproducing and draining hole H3 located at the lowermost position serves as a draining hole, and is drained therefrom.
An example of the drainage method will be described with respect to the case 10 in the vertical mounting posture and the 1 st sound reproducing and draining hole H1 being a draining hole.
When water adheres to the peripheral surface 11ki of the resonance chamber C, the water flows down to the lowermost side along the peripheral surface 11 ki. In this case, since the peripheral surface 11ki of the resonance chamber C is a tapered surface gradually expanding in diameter toward the front side (front side) of the housing cover 12, as shown in fig. 7, water W descending along the peripheral surface 11ki flows to the lowermost front end of the peripheral surface 11ki due to the slope of the tapered surface, and flows out of the housing cover 12 from the 1 st sound emission/drainage hole H1 opening therein.
In the buzzer device B of the present embodiment, the 1 st sound emission/drainage hole H1 is formed to have a size capable of surrounding the virtual circle X having a diameter of 5mm or more, and therefore, not only can the opening area of the hole be sufficiently ensured to exhibit good drainage, but also the water film can be effectively suppressed from being stretched on the inner surface of the hole, and the sound emission degradation due to the water film can be prevented.
In addition, the rim 21 of the 1 st sound reproducing and draining hole H1 on the outer side in the resonance chamber radial direction is adjacent to the lowermost portion of the peripheral surface 11ki of the resonance chamber C in the resonance chamber axial direction, and the rim 21 is formed to extend along the peripheral surface 11ki (in the embodiment, to be circular arc-shaped). As a result, the outer edge 21 extends long along the peripheral surface 11ki of the resonance chamber C, and the communication portion between the 1 st sound emission and drainage hole H1 and the peripheral surface 11ki of the resonance chamber C extends in the circumferential direction, so that even when the mounting angle of the casing 10 to the support plate F to which the buzzer device B is to be mounted varies, the outer edge 21 of the 1 st sound emission and drainage hole H1 can be exposed to the lowermost portion of the peripheral surface of the resonance chamber C. Therefore, the water W flowing down along the peripheral surface 11ki of the resonance chamber C to the lowermost tip of the peripheral surface 11ki can be smoothly discharged from the 1 st sound reproducing and discharging hole H1.
In this way, the effect of the outer edge portion 21 of the 1 st sound emission/drainage hole H1 extending along the peripheral surface 11ki of the resonance chamber C is complemented by the size effect of being able to sufficiently secure the opening area, and good and smooth drainage can be obtained without being affected by the deviation of the installation angle as a whole, so that water is less likely to remain in the casing 10, and it is possible to contribute to suppressing occurrence of malfunction of the buzzer device B.
The edge 22 on one side and the edge 23 on the other side in the resonance chamber circumferential direction of the 1 st sound reproducing/draining hole H1 of the present embodiment are opened so as to gradually separate as they come to the outside in the resonance chamber radial direction, and are formed to be line-symmetrical with respect to the bisector L of the 1 st sound reproducing/draining hole H1 in the resonance chamber circumferential direction. Thus, even when the mounting angle of the housing 10 to the support plate F around the central axis of the resonance chamber C (and thus the diaphragm 31) is deviated from the normal mounting angle, the smooth drainage of the 1 st sound emission/drainage hole H1 can be ensured without being affected by the deviation.
In this case, in particular, in the present embodiment, since the edge 22 on the one side and the edge 23 on the other side of the 1 st sound reproducing and draining hole H1 are each opened 20 ° with respect to the bisector L, the edge 21 on the outer side of the 1 st sound reproducing and draining hole H1 can be exposed to the lowermost portion of the peripheral surface 11ki of the resonance chamber C as long as the deviation of the mounting angle in one direction and the other direction is 20 ° or less, respectively. This ensures smooth drainage of the 1 st playback and drain hole H1 without being affected by the above-described deviation.
In addition, the sound reproducing and draining holes H1 to H3 of the present embodiment are provided in plural numbers and are arranged at intervals in the circumferential direction of the resonance chamber. Accordingly, the water W can be discharged without any obstruction no matter which of the sound emission/drainage holes H1 to H3 is disposed at the lowermost portion of the peripheral surface 11ki of the resonance chamber C (in other words, no matter which of the above-described vertical mounting posture and the lateral mounting posture of the housing 10 is mounted to one side and the other side), and therefore the degree of freedom in the mounting position of the housing 10 with respect to the support plate F is improved.
The outer edge 21 of each of the sound emission and drainage holes H1 to H3 in the resonance chamber radial direction is formed to have a width larger than that of the inner edge 24 in the resonance chamber circumferential direction. Accordingly, the communication portion between each sound emission and drainage hole H1 and the peripheral surface 11ki of the resonance chamber C can be expanded in the circumferential direction without particularly increasing the opening area of each sound emission and drainage hole H1, and therefore, the water W flowing down along the peripheral surface 11ki of the resonance chamber C can be discharged from each sound emission and drainage hole H1 more efficiently and smoothly.
In the present embodiment, the front surface 15 of the casing cover 12 where the sound reproducing and draining holes H1 to H3 are opened has a lower surface portion 15l and an upper surface portion 15H, the lower surface portion 15l is connected to the outer edge portion 21 of the sound reproducing and draining holes H1 to H3 in the resonance chamber radial direction, the upper surface portion 15H is connected to the other edge portions 22 to 24, and the step portion 15s formed between the lower surface portion 15l and the upper surface portion 15H extends from both ends of the outer edge portion 21 to one side of the edge portion 22 on one side and the other edge portion 23 on the other side in the resonance chamber circumferential direction, which are separated from the sound reproducing and draining holes H1 to H3, respectively. As a result, as shown in fig. 8, the water W reaching the front face 15 side of the casing 10 from the respective sound emission and drainage holes H1 to H3 can smoothly flow out along the stepped portion 15s by the surface tension, and therefore the drainage properties of the respective sound emission and drainage holes H1 to H3 can be further improved.
The embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments, and various design changes can be made without departing from the scope of the present invention described in the claims.
For example, in the above embodiment, the buzzer device B is provided for use in a vehicle such as an automobile, but the buzzer device of the present invention may be provided for use in various devices other than a vehicle.
In the above embodiment, the outer edge 21 of the sound emission/drainage hole H1 in the resonance chamber radial direction is formed in an arc shape extending substantially along the peripheral surface 11ki of the resonance chamber C, but the shape is not limited to an arc shape as long as the shape extends substantially along the peripheral surface 11ki of the resonance chamber C, and may be a straight shape extending substantially along the peripheral surface 11ki of the resonance chamber C, for example, but in this case, in order to ensure smooth drainage from the sound emission/drainage holes H1 to H3, it is preferable that the outer edge 21 is formed at a position that is in contact with or lower than the peripheral surface 11ki of the resonance chamber C when viewed from the front.
In the above embodiment, the case where the plurality of sound emission and drainage holes H1 to H3 are provided in the housing 10 so that the mounting posture of the buzzer device B to the support body (support plate F) can be selected from the plurality of mounting postures has been described, but in the present invention, the sound emission and drainage holes may be single, and in this case, the buzzer device is mounted to the support body in only a certain posture.
Claims (7)
1. A buzzer device is provided with a resonance chamber (C) and a piezoelectric buzzer (30) having a vibrating plate (31) facing the resonance chamber (C) in a casing (10), sound reproduction and drainage holes (H1-H3) are provided in the casing (10), the sound reproduction and drainage holes (H1-H3) are used for both discharging sound from the piezoelectric buzzer (30) and draining water from the resonance chamber (C),
The buzzer means are characterized in that,
The resonance chamber (C) is formed in a substantially cylindrical hole shape,
The edge (21) of the sound reproducing and draining holes (H1-H3) on the outer side in the radial direction of the resonance chamber is adjacent to the peripheral surface (11 ki) of the resonance chamber (C) in the axial direction of the resonance chamber, and the edge (21) is formed to extend along the peripheral surface (11 ki),
The sound reproducing and draining holes (H1-H3) are formed in a size capable of surrounding a circle with a diameter of more than 5mm;
The edge (22) on one side and the edge (23) on the other side of the sound reproduction and drainage holes (H1-H3) in the circumferential direction of the resonance chamber are opened so as to gradually separate from each other as approaching the outside in the radial direction of the resonance chamber, and are formed so as to be line-symmetrical with respect to the bisector (L) of the sound reproduction and drainage holes (H1-H3) in the circumferential direction of the resonance chamber.
2. Buzzer device in accordance with claim 1, wherein,
The edge (22) of one side and the edge (23) of the other side of the sound reproducing and draining holes (H1-H3) in the circumferential direction of the resonance chamber are respectively opened by 20 DEG relative to the bisector (L).
3. Buzzer device in accordance with claim 1, wherein,
The sound reproducing and draining holes (H1-H3) are provided in a plurality and are arranged at intervals in the circumferential direction of the resonance chamber.
4. Buzzer device in accordance with claim 1, wherein,
In the circumferential direction of the resonance chamber, the width of the outer edge (21) of the sound reproducing and draining holes (H1-H3) in the radial direction of the resonance chamber is larger than the width of the inner edge (24).
5. Buzzer device according to any one of claims 1 to 4,
The front face (15) of the casing (10) with the openings of the sound reproducing and draining holes (H1-H3) is provided with a low-level face (15 l) and a high-level face (15H), the low-level face (15 l) is connected with the edge (21) of the sound reproducing and draining holes (H1-H3) on the outer side of the resonance chamber in the radial direction, the high-level face (15H) is connected with the other edges (22-24) of the sound reproducing and draining holes (H1-H3),
A step (15 s) formed between the lower surface portion (15 l) and the upper surface portion (15H) extends from both ends of the outer edge portion (21) to one side of an edge portion (22) on one side and an edge portion (23) on the other side in the resonance chamber circumferential direction, which are separated from the sound reproducing and draining holes (H1-H3), respectively.
6. Buzzer device according to any one of claims 1 to 4,
The peripheral surface (11 ki) of the resonance chamber (C) is formed as a tapered surface that gradually expands in diameter toward the front side of the housing (10).
7. Buzzer device in accordance with claim 5, wherein,
The peripheral surface (11 ki) of the resonance chamber (C) is formed as a tapered surface that gradually expands in diameter toward the front side of the housing (10).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020-086248 | 2020-05-15 | ||
| JP2020086248A JP7344173B2 (en) | 2020-05-15 | 2020-05-15 | buzzer device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113674726A CN113674726A (en) | 2021-11-19 |
| CN113674726B true CN113674726B (en) | 2024-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110520731.9A Active CN113674726B (en) | 2020-05-15 | 2021-05-13 | Buzzer device |
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| Country | Link |
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| JP (1) | JP7344173B2 (en) |
| CN (1) | CN113674726B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023129803A1 (en) * | 2021-12-29 | 2023-07-06 | Skybell Technologies Ip, Llc | Doorbell housing |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58157399U (en) * | 1982-04-16 | 1983-10-20 | 本田技研工業株式会社 | Buzzer |
| JP2010237473A (en) * | 2009-03-31 | 2010-10-21 | Anden | Piezoelectric buzzer |
| CN102682755A (en) * | 2011-03-04 | 2012-09-19 | 安电株式会社 | Piezo-buzzer |
| CN104424940A (en) * | 2013-08-19 | 2015-03-18 | 安电株式会社 | Piezoelectric buzzer |
| CN109565623A (en) * | 2016-09-01 | 2019-04-02 | 松下知识产权经营株式会社 | Speaker unit and mobile body device equipped with the speaker unit |
| CN109599086A (en) * | 2019-01-25 | 2019-04-09 | 汉得利（常州）电子股份有限公司 | With the high sound pressure level buzzer for gathering dewatering type sound hole |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10313499A (en) * | 1997-05-12 | 1998-11-24 | Taiyo Yuden Co Ltd | Piezoelectric acoustic device |
| JP4082185B2 (en) * | 2002-11-18 | 2008-04-30 | アンデン株式会社 | buzzer |
-
2020
- 2020-05-15 JP JP2020086248A patent/JP7344173B2/en active Active
-
2021
- 2021-05-13 CN CN202110520731.9A patent/CN113674726B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58157399U (en) * | 1982-04-16 | 1983-10-20 | 本田技研工業株式会社 | Buzzer |
| JP2010237473A (en) * | 2009-03-31 | 2010-10-21 | Anden | Piezoelectric buzzer |
| CN102682755A (en) * | 2011-03-04 | 2012-09-19 | 安电株式会社 | Piezo-buzzer |
| CN104424940A (en) * | 2013-08-19 | 2015-03-18 | 安电株式会社 | Piezoelectric buzzer |
| CN109565623A (en) * | 2016-09-01 | 2019-04-02 | 松下知识产权经营株式会社 | Speaker unit and mobile body device equipped with the speaker unit |
| CN109599086A (en) * | 2019-01-25 | 2019-04-09 | 汉得利（常州）电子股份有限公司 | With the high sound pressure level buzzer for gathering dewatering type sound hole |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113674726A (en) | 2021-11-19 |
| JP7344173B2 (en) | 2023-09-13 |
| JP2021179576A (en) | 2021-11-18 |
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