JP7344173B2 - buzzer device - Google Patents
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- JP7344173B2 JP7344173B2 JP2020086248A JP2020086248A JP7344173B2 JP 7344173 B2 JP7344173 B2 JP 7344173B2 JP 2020086248 A JP2020086248 A JP 2020086248A JP 2020086248 A JP2020086248 A JP 2020086248A JP 7344173 B2 JP7344173 B2 JP 7344173B2
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 40
- 230000002093 peripheral effect Effects 0.000 claims description 7
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 6
- 210000000078 claw Anatomy 0.000 description 5
- 238000004891 communication Methods 0.000 description 5
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000036544 posture Effects 0.000 description 2
- 229920001875 Ebonite Polymers 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000003014 reinforcing 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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- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
Description
本発明は、ブザー装置、特にケース内に共鳴室と、その共鳴室に振動板を臨ませた圧電ブザーとが配設され、圧電ブザーからの音を放出させる放音孔がケースに設けられるブザー装置に関する。 The present invention relates to a buzzer device, particularly a buzzer device in which a resonance chamber and a piezoelectric buzzer with a diaphragm facing the resonance chamber are disposed in a case, and a sound emission hole is provided in the case to emit sound from the piezoelectric buzzer. Regarding equipment.
上記ブザー装置において、放音孔を有するケースに、放音孔とは別に水抜き孔を設ける技術は、特許文献１に開示されている。また放音孔と水抜き孔とを兼ねる放音兼排水孔をケースに設ける技術は、特許文献２に開示されている。 In the above-mentioned buzzer device, a technique for providing a water drain hole in a case having a sound emitting hole separately from the sound emitting hole is disclosed in Patent Document 1. Further, a technique for providing a sound emitting/draining hole that serves as both a sound emitting hole and a water draining hole in a case is disclosed in Patent Document 2.
特許文献１のブザー装置のように、放音孔とは別に水抜き孔をケースに設ける構造では、水抜き孔の追加に伴い共鳴室内の共鳴周波数が変化し、音圧低下が問題となる。 In a structure in which a water drain hole is provided in the case separately from the sound emitting hole, as in the buzzer device of Patent Document 1, the addition of the water drain hole changes the resonant frequency in the resonance chamber, causing a problem of a decrease in sound pressure.
そこで、この問題を解決するために、放音孔及び水抜き孔を小径にすることが考えられるが、その場合には、小径化に伴い水抜き孔の排水性が低下したり或いは孔内面に表面張力による水膜が張ってしまう虞れがあって、その水膜により放音性の低下を招いたり、或いはケース内に残る水が電子部品である圧電ブザーの故障要因となってしまう等の別の不都合がある。 Therefore, in order to solve this problem, it is possible to reduce the diameter of the sound emitting hole and drain hole, but in that case, the drainage performance of the drain hole may deteriorate due to the smaller diameter, or the inner surface of the hole may be damaged. There is a risk that a water film may form due to surface tension, which may reduce the sound output, or the water remaining inside the case may cause the piezoelectric buzzer, which is an electronic component, to malfunction. There is another inconvenience.
また特許文献２のように放音孔と水抜き孔とを兼ねる放音兼排水孔をケースに設ける従来構造では、放音兼排水孔が円形孔であって、共鳴室の周面に接するように配置されている。そのため、ブザー装置を組付けるべき支持体（例えば車体等）へのケースの組付け角度にばらつきが生じた場合には、放音兼排水孔と共鳴室周面との連通部が、共鳴室周面の最下部よりずれてしまい、そのため、共鳴室周面を伝って周面の最下部まで流下した水を放音兼排水孔からスムーズには排出できなくなる虞れがある。 In addition, in the conventional structure in which a sound emission/drainage hole that serves as both a sound emission hole and a water drainage hole is provided in the case as in Patent Document 2, the sound emission/drainage hole is a circular hole and is in contact with the circumferential surface of the resonance chamber. It is located in Therefore, if there are variations in the mounting angle of the case to the support (for example, a car body) where the buzzer device is to be mounted, the communication part between the sound emitting/drainage hole and the resonance chamber periphery may As a result, the water that has flowed down along the circumferential surface of the resonance chamber to the bottom of the circumferential surface may not be able to be smoothly discharged from the sound emission/drainage hole.
尚、特許文献２の部材でも、放音兼排水孔が小径であれば、特許文献１の構造と同様、水膜に因る不都合が生じる。 Incidentally, even in the member of Patent Document 2, if the sound emitting/drainage hole is small in diameter, problems due to a water film will occur as in the structure of Patent Document 1.
本発明は、上記に鑑み提案されたもので、従来構造の上記問題を簡単な構造で解決可能としたブザー装置を提供することを目的とする。 The present invention has been proposed in view of the above, and an object of the present invention is to provide a buzzer device that can solve the above-mentioned problems of the conventional structure with a simple structure.
上記目的を達成するために、本発明は、ケース内に共鳴室と、該共鳴室に振動板を臨ませた圧電ブザーとが配設され、前記圧電ブザーからのからの音放出と前記共鳴室内からの水抜きに兼用される放音兼排水孔が前記ケースに設けられるブザー装置において、前記共鳴室は略円筒孔状に形成され、前記放音兼排水孔の、共鳴室径方向で外方側の縁部が、前記共鳴室の周面に対し共鳴室軸方向で隣接し且つ該周面に沿って延びるように形成され、前記放音兼排水孔は、直径５ミリ以上の円を取り囲めるサイズに形成され、前記放音兼排水孔の、共鳴室周方向で一方側の縁部と他方側の縁部とが、共鳴室径方向で外方に向かうにつれて徐々に離れるように開いていて、該放音兼排水孔の共鳴室周方向の二等分線に関して線対称に形成されていることを第１の特徴とする。 In order to achieve the above object, the present invention includes a resonance chamber and a piezoelectric buzzer with a diaphragm facing the resonance chamber in a case, and the sound emission from the piezoelectric buzzer and the vibration inside the resonance chamber. In the buzzer device in which the case is provided with a sound emitting/drainage hole that also serves as a drain for water, the resonance chamber is formed in a substantially cylindrical hole shape, and the sound emitting/drainage hole is located outward in the radial direction of the resonance chamber. The side edge is formed so as to be adjacent to the circumferential surface of the resonance chamber in the axial direction of the resonance chamber and extend along the circumferential surface, and the sound emission/drainage hole has a circular shape with a diameter of 5 mm or more. The sound emitting/draining hole is formed in a size that can be surrounded by the sound emitting/draining hole, and the edges on one side and the edge on the other side in the circumferential direction of the resonance chamber are opened so as to gradually separate from each other as they move outward in the radial direction of the resonance chamber. The first feature is that the sound emitting and draining holes are formed line-symmetrically with respect to a bisector in the circumferential direction of the resonance chamber .
また本発明は、ケース内に共鳴室と、該共鳴室に振動板を臨ませた圧電ブザーとが配設され、前記圧電ブザーからの音放出と前記共鳴室内からの水抜きに兼用される放音兼排水孔が前記ケースに設けられるブザー装置において、前記共鳴室は略円筒孔状に形成され、前記放音兼排水孔の、共鳴室径方向で外方側の縁部が、前記共鳴室の周面に対し共鳴室軸方向で隣接し且つ該周面に沿って延びるように形成され、前記放音兼排水孔は、直径５ミリ以上の円を取り囲めるサイズに形成され、前記放音兼排水孔の、共鳴室径方向で外方側の縁部が内方側の縁部よりも、共鳴室周方向で幅広であることを第２の特徴とする。 Further, in the present invention, a resonance chamber and a piezoelectric buzzer with a diaphragm facing the resonance chamber are disposed in a case, and a sound discharger is used for both emitting sound from the piezoelectric buzzer and draining water from the resonance chamber. In the buzzer device in which a sound emission/drainage hole is provided in the case, the resonance chamber is formed in a substantially cylindrical hole shape, and an outer edge of the sound emission/drainage hole in the radial direction of the resonance chamber is connected to the resonance chamber. The sound emitting/draining hole is formed to be adjacent to and extending along the circumferential surface of the resonance chamber in the axial direction, and the sound emitting/drainage hole is formed in a size that can surround a circle with a diameter of 5 mm or more, The second feature is that the outer edge of the drain hole in the radial direction of the resonance chamber is wider than the inner edge in the circumferential direction of the resonance chamber.
また本発明は、ケース内に共鳴室と、該共鳴室に振動板を臨ませた圧電ブザーとが配設され、前記圧電ブザーからの音放出と前記共鳴室内からの水抜きに兼用される放音兼排水孔が前記ケースに設けられるブザー装置において、前記共鳴室は略円筒孔状に形成され、前記放音兼排水孔の、共鳴室径方向で外方側の縁部が、前記共鳴室の周面に対し共鳴室軸方向で隣接し且つ該周面に沿って延びるように形成され、前記放音兼排水孔は、直径５ミリ以上の円を取り囲めるサイズに形成され、前記ケースの、前記放音兼排水孔が開口する正面は、該放音兼排水孔の、共鳴室径方向で外方側の縁部に連なる低位面部と、その他の縁部に連なる高位面部とを有しており、前記低位面部と前記高位面部との間に形成される段差部が、該外方側の縁部の両端より前記放音兼排水孔の、共鳴室周方向で一方側の縁部及び他方側の縁部からそれぞれ離れる側に延びていることを第３の特徴としている。 Further, in the present invention, a resonance chamber and a piezoelectric buzzer with a diaphragm facing the resonance chamber are disposed in a case, and a sound discharger is used for both emitting sound from the piezoelectric buzzer and draining water from the resonance chamber. In the buzzer device in which a sound emission/drainage hole is provided in the case, the resonance chamber is formed in a substantially cylindrical hole shape, and an outer edge of the sound emission/drainage hole in the radial direction of the resonance chamber is connected to the resonance chamber. The sound emitting/draining hole is formed to be adjacent to and extending along the circumferential surface of the resonance chamber in the axial direction, and the sound emitting/draining hole is formed in a size that can surround a circle with a diameter of 5 mm or more, and , the front surface where the sound emitting/draining hole opens has a low surface portion that is continuous with the outer edge of the sound emitting/draining hole in the radial direction of the resonance chamber, and a high surface portion that is continuous with the other edge of the sound emitting/draining hole. The step portion formed between the lower surface portion and the higher surface portion extends from both ends of the outer edge to an edge of the sound emitting/drainage hole on one side in the circumferential direction of the resonance chamber. A third feature is that they extend away from the other edge.
また本発明は、第２または第３の特徴に加えて、前記放音兼排水孔（Ｈ１～Ｈ３）の、共鳴室周方向で一方側の縁部（２２）と他方側の縁部（２３）とが、共鳴室径方向で外方に向かうにつれて徐々に離れるように開いていて、該放音兼排水孔（Ｈ１～Ｈ３）の共鳴室周方向の二等分線（Ｌ）に関して線対称に形成されていることを第４の特徴とする。 In addition to the second or third feature, the present invention provides an edge (22) on one side and an edge (23) on the other side in the circumferential direction of the resonance chamber of the sound emission/drainage holes (H1 to H3). ) are opened to gradually separate from each other as they go outward in the radial direction of the resonance chamber, and the sound emitting/drainage holes (H1 to H3) are line symmetrical with respect to the bisector (L) of the resonance chamber circumferential direction. The fourth feature is that the structure is formed as follows .
また本発明は、第１または第４の特徴に加えて、前記放音兼排水孔の、共鳴室周方向で一方側の縁部と他方側の縁部とが、前記二等分線に対し各々２０°ずつ開いていることを第５の特徴とする。 Further, in addition to the first or fourth feature, the present invention provides that an edge on one side and an edge on the other side in the circumferential direction of the resonance chamber of the sound emission/drainage hole are relative to the bisector line. The fifth feature is that each opening is 20°.
また本発明は、第１～第５の何れかの特徴に加えて、前記放音兼排水孔は複数有って、共鳴室周方向に互いに間隔をおいて配置されることを第６の特徴とする。Further, in addition to any one of the first to fifth features, the present invention provides a sixth feature that the sound emitting/drainage holes are plural and are arranged at intervals in the circumferential direction of the resonance chamber. shall be.
また本発明は、第１～第６の何れかの特徴に加えて、前記共鳴室の周面は、前記ケースの正面側に徐々に拡径したテーパ面に形成されることを第７の特徴とする。 Further, in addition to any one of the first to sixth features, the present invention provides a seventh feature that the peripheral surface of the resonance chamber is formed as a tapered surface whose diameter gradually increases toward the front side of the case. shall be.
第１～第３の特徴によれば、共鳴室を略円筒孔状としたケースに放音兼排水孔を設けたブザー装置において、放音兼排水孔は、直径５ミリ以上の円を取り囲めるサイズに形成されるので、孔の開口面積を十分に確保して、良好な排水性を発揮可能であるばかりか、孔内面に水膜が張るのを効果的に抑制して、水膜に因る放音性低下を防止できる。その上、放音兼排水孔の、共鳴室径方向で外方側の縁部が、共鳴室の周面に対し共鳴室軸方向で隣接し且つ該周面に沿って延びるように形成されるので、その外方側の縁部が共鳴室周面に沿って周方向に延びることで、放音兼排水孔と共鳴室周面との連通部が周方向に拡がり、従って、ブザー装置を装着すべき支持体へのケースの取付け角度にばらつきが生じた場合でも、放音兼排水孔の外方側の縁部を共鳴室周面の最下部に露出させることができるため、共鳴室周面を伝って周面の最下部まで流下した水を放音兼排水孔からスムーズに排出可能となる。このように放音兼排水孔は、これの外方側の縁部が共鳴室周面に沿って延びる点による効果と、前述の開口面積を十分確保し得たサイズ効果とが相俟って、全体として良好且つスムーズな排水性が上記取付け角度のばらつきに影響されずに得られるので、ケース内に水が残りにくくなって、ブザー装置の故障発生の抑制に寄与することができる。 According to the first to third features, in a buzzer device in which a sound emission/drainage hole is provided in a case with a resonance chamber in the shape of a substantially cylindrical hole, the sound emission/drainage hole can surround a circle with a diameter of 5 mm or more. Since the pores are formed to a certain size, it not only ensures a sufficient opening area for good drainage, but also effectively suppresses the formation of a water film on the inner surface of the pores. It is possible to prevent a decrease in sound emitting performance caused by noise. Furthermore, the outer edge of the sound emission/drainage hole in the radial direction of the resonance chamber is formed to be adjacent to the circumferential surface of the resonance chamber in the axial direction of the resonance chamber and to extend along the circumferential surface. Therefore, the outer edge extends in the circumferential direction along the circumferential surface of the resonance chamber, so that the communication part between the sound emission/drainage hole and the circumferential surface of the resonance chamber expands in the circumferential direction, and therefore, the buzzer device can be attached. Even if there are variations in the mounting angle of the case to the supporting body, the outer edge of the sound emission/drainage hole can be exposed at the lowest part of the resonance chamber periphery. The water that has flowed down to the lowest part of the circumferential surface can be smoothly discharged from the sound emitting and draining hole. In this way, the sound emission/drainage hole has the effect of the outer edge extending along the circumferential surface of the resonance chamber, and the size effect of ensuring a sufficient opening area as described above. As a whole, good and smooth drainage performance can be obtained without being affected by the above-mentioned variations in the mounting angle, so water is less likely to remain in the case, which can contribute to suppressing the occurrence of failures of the buzzer device.
また第１，第４の特徴によれば、放音兼排水孔の、共鳴室周方向で一方側の縁部と他方側の縁部とが、共鳴室径方向で外方に向かうにつれて徐々に離れるよう開いていて、放音兼排水孔の共鳴室周方向の二等分線に関して線対称に形成されるので、支持体に対するケースの取付角度が正規の取付け角度より、一方向又は他方向の何れかにばらついた場合でも、それに影響されずに放音兼排水孔のスムーズな排水性が確保可能となる。 Further, according to the first and fourth features, the edge on one side and the edge on the other side in the circumferential direction of the resonance chamber of the sound emitting/drainage hole gradually move outward in the radial direction of the resonance chamber. The sound emitting/drainage holes are opened apart and are formed axisymmetrically with respect to the circumferential bisector of the resonance chamber, so the mounting angle of the case to the support body may be different from the normal mounting angle in one direction or the other. Even if there is any variation, smooth drainage performance of the sound emitting/drainage hole can be ensured without being affected by the variation.
また第２の特徴によれば、放音兼排水孔の、共鳴室径方向で外方側の縁部が内方側の縁部よりも、共鳴室周方向で幅広であるので、放音兼排水孔の開口面積を特別に大きくすることなく、放音兼排水孔と共鳴室周面との連通部を周方向に拡げることができて、共鳴室周面に沿って流下する水を放音兼排水孔より効率よくスムーズに排出できる。According to the second feature, the outer edge of the sound emitting/draining hole in the radial direction of the resonance chamber is wider in the circumferential direction of the resonance chamber than the inner edge of the sound emitting/draining hole. Without increasing the opening area of the drainage hole, the communication area between the sound emission/drainage hole and the resonance chamber periphery can be expanded in the circumferential direction, allowing the water flowing down along the resonance chamber periphery to emit sound. It can be drained efficiently and smoothly using the dual drainage hole.
また第３の特徴によれば、ケースの、放音兼排水孔が開口する正面は、放音兼排水孔の、共鳴室径方向で外方側の縁部に連なる低位面部と、その他の縁部に連なる高位面部とを有し、それら低位面部と高位面部との間に形成される段差部が、外方側の縁部の両端より放音兼排水孔の、共鳴室周方向で一方側の縁部及び他方側の縁部からそれぞれ離れる側に延びるので、放音兼排水孔からケース正面側に達した排水が、表面張力の働きで段差部を伝ってスムーズに流出可能となり、放音兼排水孔の排水性を更に高めることができる。According to the third feature, the front surface of the case where the sound emission/drainage hole opens has a lower surface portion that is connected to the outer edge of the sound emission/drainage hole in the radial direction of the resonance chamber, and the other edges. The step portion formed between the low surface portion and the high surface portion extends from both ends of the outer edge to one side of the sound emission/drainage hole in the circumferential direction of the resonance chamber. and the other edge, respectively, so that water that reaches the front side of the case from the sound emitting/drainage hole can smoothly flow out along the step part due to the action of surface tension, and the sound emitted. The drainage performance of the drain hole can be further improved.
また第５の特徴によれば、放音兼排水孔の、共鳴室周方向で一方側の縁部と他方側の縁部とが、前記二等分線に対し各々２０°ずつ開いているので、支持体に対するケースの取付角度が正規の取付け角度より一方向又は他方向の何れかにばらついた場合でも、そのばらつきが２０°以下であれば、そのばらつきに影響されずに放音兼排水孔のスムーズな排水性が確保可能となる。According to the fifth feature, the edges of one side and the edge of the other side of the sound emission/drainage hole in the circumferential direction of the resonance chamber are each opened by 20° with respect to the bisector. Even if the mounting angle of the case relative to the support body varies from the normal mounting angle in one direction or the other, as long as the variation is 20 degrees or less, the sound emitting and drainage hole will not be affected by the variation. Smooth drainage can be ensured.
また第６の特徴によれば、放音兼排水孔は複数有って、共鳴室周方向に互いに間隔をおいて配置されるので、何れの放音兼排水孔を共鳴室周面の最下部に配置しても排水が可能となり、従って、ケースの支持体に対する取付位置の自由度が高められる。According to the sixth feature, there are a plurality of sound emitting/draining holes and they are arranged at intervals in the circumferential direction of the resonance chamber, so which sound emitting/draining hole is located at the lowest part of the circumferential surface of the resonance chamber. Drainage is possible even when the case is placed in the support body, and therefore, the degree of freedom in attaching the case to the support body is increased.
また第７の特徴によれば、共鳴室の周面は、ケースの正面側に徐々に拡径したテーパ面に形成されるので、その周面を伝い下った水は、テーパ面の勾配により周面の最下部前端までスムーズに流れ、そこに開口する放音兼排水孔よりケース外に流出可能となる。これにより、共鳴室内からの水抜きがより確実に行われる。 According to the seventh feature, the circumferential surface of the resonance chamber is formed into a tapered surface whose diameter gradually increases toward the front side of the case, so that the water flowing down the circumferential surface is absorbed by the slope of the tapered surface. It flows smoothly to the front edge of the lowest part of the surface, and can flow out of the case through the sound emitting and drainage hole that opens there. This allows water to be drained from the resonance chamber more reliably.
以下、本発明の実施の形態について、添付図面を参照しながら説明する。 Embodiments of the present invention will be described below with reference to the accompanying drawings.
先ず、図１～図４において、車両としての自動車の車体適所には、運転状況に応じて車外の人、或いはドライバーに警報（例えば左折時の警報、後退時の警報等）を発するブザー装置Ｂが取付けられる。 First, in FIGS. 1 to 4, a buzzer device B is installed at an appropriate place on the body of an automobile as a vehicle to issue a warning to a person outside the vehicle or the driver (for example, a warning when turning left, a warning when reversing, etc.) depending on the driving situation. is installed.
ブザー装置Ｂは、合成樹脂製のケース１０と、そのケース１０内に画成される共鳴室Ｃと、共鳴室Ｃに振動板３１を臨ませた圧電ブザー３０と、ケース１０に設けられて圧電ブザー３０からの音放出と共鳴室Ｃ内からの水抜きに兼用される放音兼排水孔Ｈ１～Ｈ３とを備える。特に実施形態の放音兼排水孔Ｈ１～Ｈ３は複数有って、共鳴室Ｃの周方向に互いに間隔をおいて配置される。 Buzzer device B includes a case 10 made of synthetic resin, a resonance chamber C defined in the case 10, a piezoelectric buzzer 30 with a diaphragm 31 facing the resonance chamber C, and a piezoelectric buzzer 30 provided in the case 10. Sound emitting/draining holes H1 to H3 are provided which serve both for emitting sound from the buzzer 30 and draining water from the resonance chamber C. In particular, in the embodiment, there are a plurality of sound emitting and draining holes H1 to H3, which are arranged at intervals in the circumferential direction of the resonance chamber C.
ケース１０は、中空のボックス状に形成されるケース本体１１と、そのケース本体１１を下面を除く表面を被覆するようケース本体１１に嵌合されるボックス状のケースカバー１２とで分割構成される。 The case 10 is divided into a case body 11 formed in the shape of a hollow box, and a box-shaped case cover 12 fitted to the case body 11 so as to cover the surface of the case body 11 except for the bottom surface. .
ケース本体１１とケースカバー１２との嵌合面間には、その間を着脱可能に結合する複数の結合機構１３が設けられ、各々の結合機構１３は、上記嵌合面の何れか一方（図示例ではケースカバー１２）に設けた複数の係止孔１２ａと、何れか他方（図示例ではケース本体１１）にそれぞれ突設されて複数の係止孔１２ａに各々係脱可能に係止する複数の係止爪１１ｔとを備える。尚、ケース本体１１とケースカバー１２間の結合手段としては、実施形態の結合機構１３に限定されず、例えば、ねじ止め、カシメ、ピン止め等の結合手段も実施可能である。 A plurality of coupling mechanisms 13 are provided between the mating surfaces of the case body 11 and the case cover 12 to removably couple them. Here, a plurality of locking holes 12a provided in the case cover 12) and a plurality of locking holes 12a each protruding from one of the other (in the illustrated example, the case body 11) are releasably locked in the plurality of locking holes 12a. A locking claw 11t is provided. Note that the coupling means between the case body 11 and the case cover 12 is not limited to the coupling mechanism 13 of the embodiment, and coupling means such as screwing, caulking, and pinning can also be implemented.
ケースカバー１２の複数の特定外面（例えば左右側面と背面）には、ブザー装置Ｂを支持させる支持体、例えば車体に固定の支持板Ｆにケース１０を取付け固定するためのクリップ４０が選択的且つ着脱可能に装着できるようになっている。クリップ４０は、弾性材料（例えば硬質ゴム）により形成される。尚、クリップ４０は、支持板Ｆを介さずに車体の板状部に直接、取付け固定してもよく、その場合は、車体が支持体となる。 Clips 40 for attaching and fixing the case 10 to a support for supporting the buzzer device B, for example, a support plate F fixed to the vehicle body, are selectively attached to a plurality of specific outer surfaces (for example, the left and right side surfaces and the back surface) of the case cover 12. It can be installed in a removable manner. Clip 40 is made of an elastic material (eg, hard rubber). Note that the clip 40 may be directly attached and fixed to the plate-shaped portion of the vehicle body without using the support plate F, and in that case, the vehicle body serves as the support.
次に、クリップ４０の取付構造について説明する。ケースカバー１２の複数の特定外面（例えば左右側面と背面）には、上下方向に延びて互いに平行する一対の支持レール１２ｒが突設され、両支持レール１２ｒの上端間は、クリップ４０に対する摺動ストッパを兼ねる連結枠１２ｓで結合される。一方、クリップ４０は、一対の支持レール１２ｒ間に摺動可能に挟持、支持される被支持部４１ｂを裏面に一体に有する台座４１を有する。この台座４１の裏面（即ち被支持部４１ｂ）とケースカバー１２の上記特定外面との対向面には、互いに係脱可能な第１，第２係止突起４１ｂｔ，１２ｔが形成される。 Next, the mounting structure of the clip 40 will be explained. A pair of support rails 12r extending in the vertical direction and parallel to each other is protruded from a plurality of specific outer surfaces (for example, the left and right side surfaces and the back surface) of the case cover 12, and the upper ends of both support rails 12r are slidable against the clip 40. They are connected by a connecting frame 12s that also serves as a stopper. On the other hand, the clip 40 has a pedestal 41 that integrally has a supported portion 41b on the back surface that is slidably held and supported between the pair of support rails 12r. First and second locking protrusions 41bt and 12t, which are removable from each other, are formed on the opposing surface of the back surface of the pedestal 41 (that is, the supported portion 41b) and the specific outer surface of the case cover 12.
従って、それら係止突起４１ｂｔ，１２ｔ相互を係止させ且つ前記連結枠１２ｓに被支持部４１ｂの上端を係合させることで、台座４１（従ってクリップ４０）が支持レール１２ｒ上の定位置に固定可能である。 Therefore, by locking the locking protrusions 41bt and 12t with each other and engaging the upper end of the supported portion 41b with the connection frame 12s, the base 41 (therefore, the clip 40) is fixed at a fixed position on the support rail 12r. It is possible.
また台座４１の表面よりテーパ状に立ち上がる台座先部４１ａは、クリップ４０の支持板Ｆへの取付け状態で、支持板Ｆにクッション体４３を挟んで対向配置される。また台座４１の表面中央部には、クッション体４３の中心孔４３ｈを通して外方に延びる支柱部４５が突設され、その支柱部４５の先部は、クッション体４３の中心孔４３ｈに先端部が係合可能な一対の弾性係止爪４５ｔを一体に有する。その両弾性係止爪４５ｔの中間部外面には、支持板Ｆの係合孔Ｆｈの縁部に弾力的に係止可能な係止突部４５ｔｋが突設され、その係止突部４５ｔｋとクッション体４３との間に係合孔Ｆｈの縁部が挟持、固定可能となっている。 Further, a pedestal tip portion 41a that rises in a tapered shape from the surface of the pedestal 41 is disposed opposite to the support plate F with the cushion body 43 interposed therebetween when the clip 40 is attached to the support plate F. Further, in the center of the surface of the pedestal 41, a support 45 that extends outward through the center hole 43h of the cushion body 43 is provided in a protruding manner. It integrally includes a pair of elastic locking claws 45t that can be engaged. A locking protrusion 45tk that can be elastically locked to the edge of the engagement hole Fh of the support plate F is provided on the outer surface of the intermediate portion of both elastic locking claws 45t, and the locking protrusion 45tk and The edge of the engagement hole Fh can be held and fixed between the cushion body 43 and the cushion body 43 .
ケース１０に装着したクリップ４０を支持板Ｆに取付ける際には、台座先部４１ａと弾性係止爪４５ｔとの間でクッション体４３を予めクリップ４０に仮止めしておく。そして、その状態からクリップ４０の弾性係止爪４１ｔを支持板Ｆの係合孔Ｆｈ内に押し込むようにすれば、図４に示す態様でクリップ４０が支持板Ｆに取付け可能となる。かくして、クリップ４０（延いてはケース１０）を支持板Ｆ、従って車体に固定可能である。 When attaching the clip 40 attached to the case 10 to the support plate F, the cushion body 43 is temporarily fixed to the clip 40 in advance between the pedestal tip 41a and the elastic locking claw 45t. Then, from this state, by pushing the elastic locking claw 41t of the clip 40 into the engagement hole Fh of the support plate F, the clip 40 can be attached to the support plate F in the manner shown in FIG. In this way, the clip 40 (and thus the case 10) can be fixed to the support plate F, and therefore to the vehicle body.
次にケース本体１１の構造をより具体的に説明する。ケース本体１１は、正面側を開放したボックス状のケース本体主部１１ｍと、そのケース本体主部１１ｍの内面に一体に結合される概略円筒状の共鳴室形成壁部１１ｋと、共鳴室形成壁部１１ｋおよびケース本体主部１１ｍの底壁相互間を一体に結合する補強リブ部１１ａとを備えており、ケース本体主部１１ｍの底面には、カプラ部１１ｃが一体に連設される。 Next, the structure of the case body 11 will be explained in more detail. The case body 11 includes a box-shaped case body main part 11m with an open front side, a generally cylindrical resonance chamber forming wall part 11k integrally coupled to the inner surface of the case main body main part 11m, and a resonance chamber forming wall. 11k and a reinforcing rib portion 11a that integrally connects the bottom wall of the main case main portion 11m, and a coupler portion 11c is integrally provided on the bottom surface of the main case main portion 11m.
共鳴室形成壁部１１ｋの内部空間は共鳴室Ｃを構成する。実施形態の共鳴室形成壁部１１ｋの内周面は、正面側に緩やかに拡径したテーパ状に形成され、そのテーパ状の内周面が共鳴室Ｃの周面１１ｋｉを構成する。そのテーパの勾配により、共鳴室Ｃの周面１１ｋｉに侵入した水はケース１０の正面側にスムーズに流下する。 The internal space of the resonance chamber forming wall portion 11k constitutes a resonance chamber C. The inner circumferential surface of the resonance chamber forming wall portion 11k of the embodiment is formed in a tapered shape whose diameter gradually increases toward the front side, and the tapered inner circumferential surface constitutes the circumferential surface 11ki of the resonance chamber C. Due to 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 case 10.
共鳴室形成壁部１１ｋの開放後端には、これを塞ぐようにして圧電ブザー３０の外周部が取付けられる。圧電ブザー３０は、共鳴室形成壁部１１ｋに外周部が固定される円板状の振動板３１と、振動板３１の中央部に接合される圧電素子３２とを有する。 The outer periphery of the piezoelectric buzzer 30 is attached to the open rear end of the resonance chamber forming wall 11k so as to close it. The piezoelectric buzzer 30 includes a disc-shaped diaphragm 31 whose outer circumference is fixed to the resonance chamber forming wall 11k, and a piezoelectric element 32 joined to the center of the diaphragm 31.
ケース本体主部１１ｍの背面には、振動板３１及び圧電素子３２にリード線を介して一端が接続される一対の端子３４，３５が固定される。その両端子３４，３５は、抵抗３６を介して接続されており、また各端子３４，３５の他端は、下方に延びてカプラ部１１ｃ内に露出し、その露出部が、外部配線に接続可能なカプラ端子部を構成する。而して、そのカプラ端子部は、外部配線を介して不図示の電子制御装置に接続される。 A pair of terminals 34 and 35, one end of which is connected to the diaphragm 31 and the piezoelectric element 32 via lead wires, are fixed to the back surface of the case main body main portion 11m. Both terminals 34, 35 are connected via a resistor 36, and the other end of each terminal 34, 35 extends downward and is exposed within the coupler portion 11c, and the exposed portion is connected to external wiring. Configure a possible coupler terminal section. The coupler terminal portion is connected to an electronic control device (not shown) via external wiring.
ケースカバー１２の前壁部は、共鳴室Ｃの前面の大部分を塞ぐようにして共鳴室形成壁部１１ｋに隣接配置される。そして、そのケースカバー１２の前面即ち正面１５には、ケース１０が縦置き配置（図９（Ａ）参照）された状態で最下位置となる第１放音兼排水孔Ｈ１と、ケース１０が左右一方側に横置き配置（図９（Ｂ）参照）された状態で最下位置となる第２音兼排水孔Ｈ２と、ケース１０が左右他方側に横置き配置（図９（Ｃ）参照）された状態で最下位置となる第３音兼排水孔Ｈ３とが設けられる。 The front wall portion of the case cover 12 is arranged adjacent to the resonance chamber forming wall portion 11k so as to close most of the front surface of the resonance chamber C. On the front surface 15 of the case cover 12, there is a first sound emitting/drainage hole H1 which is located at the lowest position when the case 10 is placed vertically (see FIG. 9(A)), and a first sound emitting/drainage hole H1. The second sound/drain hole H2 is located at the lowest position when placed horizontally on one side of the left and right (see FIG. 9(B)), and the case 10 is placed horizontally on the other side of the left and right (see FIG. 9(C)). ) is provided with a third sound/drainage hole H3 which is at the lowest position.
各々の放音兼排水孔Ｈ１～Ｈ３の、共鳴室径方向で外方側の縁部２１は、共鳴室Ｃの周面１１ｋｉに対し共鳴室軸方向で隣接し且つ周面１１ｋｉの周方向に沿って延びるように（実施形態では円弧状に）形成される。しかも各放音兼排水孔Ｈ１～Ｈ３は、直径５ミリ以上の仮想円Ｘを取り囲めるサイズに形成される。 The outer edge 21 of each of the sound emitting and draining holes H1 to H3 in the radial direction of the resonance chamber is adjacent to the circumferential surface 11ki of the resonance chamber C in the axial direction of the resonance chamber and in the circumferential direction of the circumferential surface 11ki. It is formed so as to extend along (in the embodiment, arcuate). Furthermore, each of the sound emitting/draining holes H1 to H3 is formed to a size that can surround an imaginary circle X having a diameter of 5 mm or more.
また本実施形態では、共鳴室Ｃの周面１１ｋｉの外端縁部にテーパ状の小さな面取り面１１ｋｉｃが形成されており、この面取り面１１ｋｉｃに相当する小段差面を介して共鳴室Ｃの周面１１ｋｉと上記縁部２１とが接続される。尚、上記面取り面１１ｋｉｃは、省略してもよい。 Further, in this embodiment, a small tapered chamfered surface 11kic is formed at the outer edge of the peripheral surface 11ki of the resonance chamber C, and the peripheral surface of the resonance chamber C is formed through a small step surface corresponding to the chamfered surface 11kic. The surface 11ki and the edge 21 are connected. Note that the chamfered surface 11kic may be omitted.
また各放音兼排水孔Ｈ１～Ｈ３の、共鳴室周方向で一方側の縁部２２と他方側の縁部２３とは、共鳴室径方向で外方に向かうにつれて徐々に離れるように開いていて、放音兼排水孔Ｈ１～Ｈ３の共鳴室周方向の二等分線Ｌに関して線対称に形成される。 Furthermore, 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 emitting/drainage holes H1 to H3 are opened so as to gradually separate from each other as they go outward in the radial direction of the resonance chamber. The sound emitting/draining holes H1 to H3 are formed symmetrically with respect to a bisector L in the circumferential direction of the resonance chamber.
特に本実施形態では、図８に明示したように各放音兼排水孔Ｈ１～Ｈ３の、共鳴室周方向で一方側の縁部２２と他方側の縁部２３とが、共鳴室Ｃ（従って振動板３１）の中心軸線を通って各放音兼排水孔Ｈ１～Ｈ３を共鳴室周方向に二等分する二等分線Ｌに対し、各々２０°ずつ開いている。 In particular, in this embodiment, as clearly shown in FIG. They are each opened by 20° with respect to a bisector L that passes through the central axis of the diaphragm 31) and bisects each of the sound emission and drainage holes H1 to H3 in the circumferential direction of the resonance chamber.
しかも各放音兼排水孔Ｈ１～Ｈ３の、共鳴室径方向で外方側の縁部２１は、内方側の縁部２４よりも、共鳴室周方向で幅広に形成される。またその内方側の縁部２４は、実施形態では共鳴室径方向で内方側に中高の山形形状に形成されており、これにより、各放音兼排水孔Ｈ１～Ｈ３は、前述の如く直径５ミリ以上の仮想円Ｘを取り囲めるサイズに形成されながらも、孔の開口面積を極力抑え得る孔形状とすることができる。 Furthermore, the outer edge 21 of each of the sound emitting/draining holes H1 to H3 in the radial direction of the resonance chamber is formed wider in the circumferential direction of the resonance chamber than the inner edge 24 thereof. Further, in the embodiment, the inner edge portion 24 is formed in the shape of a medium-high chevron toward the inner side in the radial direction of the resonance chamber, so that each of the sound emitting and draining holes H1 to H3 is formed as described above. Although the hole is formed in a size that can surround an imaginary circle X having a diameter of 5 mm or more, the hole can have a shape that minimizes the opening area of the hole.
またケース１０（より具体的にはケースカバー１２）の、放音兼排水孔Ｈ１～Ｈ３が開口する前面即ち正面１５は、放音兼排水孔Ｈ１～Ｈ３の、共鳴室径方向で外方側の縁部２１に連なる低位面部１５ｌと、その他の縁部２２～２４に連なる高位面部１５ｈとを有する。そして、それら低位面部１５ｌと高位面部１５ｈとの間に形成される段差部１５ｓが、外方側の縁部２１の両端より放音兼排水孔Ｈ１～Ｈ３の、共鳴室周方向で一方側の縁部２２及び他方側の縁部２３からそれぞれ離れる側に（換言すれば、各々の縁部２２，２３の延長線上を直線状に）延びるように形成される。 Further, the front surface 15 of the case 10 (more specifically, the case cover 12) where the sound emission/drainage holes H1 to H3 open is the outer side of the sound emission/drainage holes H1 to H3 in the radial direction of the resonance chamber. It has a low surface portion 15l that is continuous to the edge 21 of and a high surface portion 15h that is continuous to the other edges 22 to 24. A step portion 15s formed between the lower surface portion 15l and the higher surface portion 15h extends from both ends of the outer edge 21 to one side of the sound emission/drainage holes H1 to H3 in the circumferential direction of the resonance chamber. It is formed so as to extend away from the edge 22 and the other edge 23 (in other words, linearly on the extension line of each edge 22 and 23).
次に実施形態の作用について説明する。 Next, the operation of the embodiment will be explained.
ブザー装置Ｂは、これの圧電ブザー３０に不図示の電子制御装置から電気信号が送られると、圧電素子３２に連動する振動板３１の振動により警報音が発せられ、これが共鳴室Ｃで増幅されて第１～第３放音兼排水孔Ｈ１～Ｈ３から放音される。 In the buzzer device B, when an electric signal is sent to the piezoelectric buzzer 30 from an electronic control device (not shown), an alarm sound is emitted by the vibration of the diaphragm 31 linked to the piezoelectric element 32, and this is amplified in the resonance chamber C. The sound is emitted from the first to third sound emitting/draining holes H1 to H3.
また、支持体としての支持板Ｆにブザー装置Ｂのケース１０を取付けるためのクリップ４０は、これをケース１０（より具体的にはケースカバー１２）の複数の特定外面（実施形態では左右側面と背面）の何れかに選択的に装着することで、ケース１０の支持板Ｆに対する取付姿勢を複数選択可能である。即ち、図９（Ａ）～（Ｃ）に例示したように、第１放音兼排水孔Ｈ１が共鳴室Ｃの最下部に臨む位置となる縦置き取付姿勢と、第２放音兼排水孔Ｈ２が共鳴室Ｃの最下部に臨む位置となる第１の横置き取付姿勢と、第３放音兼排水孔Ｈ３が共鳴室Ｃの最下部に臨む位置となる第２の横置き取付姿勢の何れでも選択することができる。 Moreover, the clip 40 for attaching the case 10 of the buzzer device B to the support plate F as a support body is attached to a plurality of specific outer surfaces (in the embodiment, the left and right side surfaces) of the case 10 (more specifically, the case cover 12). By selectively attaching the case 10 to either of the rear surfaces), it is possible to select a plurality of attachment postures of the case 10 with respect to the support plate F. That is, as illustrated in FIGS. 9(A) to 9(C), the vertical mounting position is such that the first sound emitting/draining hole H1 faces the lowest part of the resonance chamber C, and the second sound emitting/draining hole A first horizontal mounting position in which H2 faces the lowest part of the resonance chamber C, and a second horizontal mounting position in which the third sound emission/drainage hole H3 faces the lowest part of the resonance chamber C. You can choose either one.
ところでブザー装置Ｂにおいて、ケース１０内、特に共鳴室Ｃには、雨水や結露水等が入り込んで滞留する可能性があり、その場合に水を外部に排出するために第１～第３放音兼排水孔Ｈ１～Ｈ３の何れか（特に最下位置にある放音兼排水孔）が水抜き孔として利用される。例えば、ケース１０が縦置き取付姿勢にある場合には、最下位置にある第１放音兼排水孔Ｈ１が水抜き孔となって、そこから排水される。またケース１０が左右一方側又は他方側の横置き取付姿勢にある場合には、最下位置にある第２放音兼排水孔Ｈ２又は第３放音兼排水孔Ｈ３が水抜き孔となって、そこから排水される。 By the way, in the buzzer device B, there is a possibility that rain water, dew water, etc. enters and accumulates in the case 10, especially in the resonance chamber C. Any one of the drain holes H1 to H3 (especially the sound emitting drain hole located at the lowest position) is used as a drain hole. For example, when the case 10 is in the vertical mounting position, the first sound emitting/draining hole H1 located at the lowest position serves as a draining hole, through which water is drained. In addition, when the case 10 is in the horizontal mounting position on one side or the other side, the second sound emitting/draining hole H2 or the third sound emitting/draining hole H3 located at the lowest position serves as a drain hole. , from which water is drained.
その排水態様の一例を、ケース１０が縦置き取付姿勢にあって第１放音兼排水孔Ｈ１が水抜き孔となる場合について説明する。 An example of the drainage mode will be described in the case where the case 10 is in a vertical mounting position and the first sound emitting/drainage hole H1 serves as a drainage hole.
共鳴室Ｃの周面１１ｋｉに水が付着すると、それは、周面１１ｋｉを伝って最下部側に流下する。この場合、共鳴室Ｃの周面１１ｋｉは、ケースカバー１２の正面側（前方）に徐々に拡径するテーパ面であることから、周面１１ｋｉを伝い下った水Ｗは、図７に示すように、テーパ面の勾配により周面１１ｋｉの最下部前端まで流れ、そこに開口する第１放音兼排水孔Ｈ１よりケースカバー１１外に流出する。 When water adheres to the circumferential surface 11ki of the resonance chamber C, it flows down the circumferential surface 11ki to the lowermost side. In this case, the circumferential surface 11ki of the resonance chamber C is a tapered surface that gradually expands in diameter toward the front side (front) of the case cover 12, so the water W flowing down the circumferential surface 11ki flows as shown in FIG. Then, due to the slope of the tapered surface, the water flows to the lowermost front end of the peripheral surface 11ki, and flows out of the case cover 11 through the first sound emission/drainage hole H1 opened there.
而して、本実施形態のブザー装置Ｂでは、第１放音兼排水孔Ｈ１は、直径５ミリ以上の仮想円Ｘを取り囲めるサイズに形成されるので、孔の開口面積を十分に確保して、良好な排水性を発揮可能であるばかりか、孔内面に水膜が張るのを効果的に抑制して、水膜に因る放音性低下を防止できる。 In the buzzer device B of this embodiment, the first sound emitting/drainage hole H1 is formed in a size that can surround the virtual circle X having a diameter of 5 mm or more, so that a sufficient opening area of the hole is ensured. This not only makes it possible to exhibit good drainage performance, but also effectively suppresses the formation of a water film on the inner surface of the hole, thereby preventing a decrease in sound emitting performance due to the water film.
その上、第１放音兼排水孔Ｈ１の、共鳴室径方向で外方側の縁部２１は、共鳴室Ｃの周面１１ｋｉの最下部に対し共鳴室軸方向で隣接し且つその周面１１ｋｉに沿って延びるように（実施形態では円弧状に）形成される。これにより、その外方側の縁部２１が共鳴室Ｃの周面１１ｋｉに沿って長く延びることで、第１放音兼排水孔Ｈ１と共鳴室Ｃの周面１１ｋｉとの連通部が周方向に拡がるため、ブザー装置Ｂを装着すべき支持板Ｆへのケース１０の取付け角度にばらつきが生じた場合でも、第１放音兼排水孔Ｈ１の外方側の縁部２１を共鳴室Ｃ周面の最下部に露出させることができる。従って、共鳴室Ｃの周面１１ｋｉを伝って周面１１ｋｉの最下部前端まで流下した水Ｗを第１放音兼排水孔Ｈ１からスムーズに排出可能となる。 Moreover, the outer edge 21 of the first sound emission/drainage hole H1 in the radial direction of the resonance chamber is adjacent to the lowest part of the circumferential surface 11ki of the resonance chamber C in the axial direction of the resonance chamber, and 11ki (in the embodiment, in an arc shape). As a result, the outer edge 21 extends long along the circumferential surface 11ki of the resonance chamber C, so that the communication portion between the first sound emitting/drainage hole H1 and the circumferential surface 11ki of the resonance chamber C is formed in the circumferential direction. Therefore, even if there are variations in the mounting angle of the case 10 to the support plate F on which the buzzer device B is mounted, the outer edge 21 of the first sound emitting/drainage hole H1 can be placed around the resonance chamber C. Can be exposed at the bottom of the surface. Therefore, the water W that has flowed down along the circumferential surface 11ki of the resonance chamber C to the lowermost front end of the circumferential surface 11ki can be smoothly discharged from the first sound emission/drainage hole H1.
このように第１放音兼排水孔Ｈ１は、これの外方側の縁部２１が共鳴室Ｃの周面１１ｋｉに沿って延びる点による効果と、前述の開口面積を十分確保し得たサイズ効果とが相俟って、全体として良好且つスムーズな排水性が上記取付け角度のばらつきに影響されずに得られるから、ケース１０内に水が残りにくくなって、ブザー装置Ｂの故障発生の抑制に寄与することができる。 In this way, the first sound emitting/draining hole H1 has an effect due to the fact that its outer edge 21 extends along the circumferential surface 11ki of the resonance chamber C, and a size that can sufficiently secure the aforementioned opening area. Combined with this effect, good and smooth drainage performance can be obtained as a whole without being affected by the above-mentioned variations in the mounting angle, making it difficult for water to remain in the case 10, thereby suppressing the occurrence of failures of the buzzer device B. can contribute to
また本実施形態の第１放音兼排水孔Ｈ１の、共鳴室周方向で一方側の縁部２２と他方側の縁部２３とは、共鳴室径方向で外方に向かうにつれて徐々に離れるよう開いていて、第１放音兼排水孔Ｈ１の共鳴室周方向の前記二等分線Ｌに関して線対称に形成される。これにより、支持板Ｆに対するケース１０の、共鳴室Ｃ（従って振動板３１）の中心軸線回りの取付け角度が正規の取付け角度より、一方向又は他方向の何れかにばらついた場合でも、それに影響されずに第１放音兼排水孔Ｈ１のスムーズな排水性が確保可能となる。 Further, the edge 22 on one side and the edge 23 on the other side in the circumferential direction of the resonance chamber of the first sound emitting/drainage hole H1 of this embodiment are gradually separated from each other as they move outward in the radial direction of the resonance chamber. It is open and formed symmetrically with respect to the bisector L in the circumferential direction of the resonance chamber of the first sound emitting/draining hole H1. As a result, even if the mounting angle of the case 10 about the central axis of the resonance chamber C (therefore the diaphragm 31) with respect to the support plate F varies from the normal mounting angle in either one direction or the other, this will not affect the mounting angle. Smooth drainage performance of the first sound emitting/drainage hole H1 can be ensured without being drained.
この場合、特に本実施形態では、第１放音兼排水孔Ｈ１の上記一方側の縁部２２と他方側の縁部２３とが、上記二等分線Ｌに対し各々２０°ずつ開いているので、当該取付け角度の、一方向・他方向へのばらつきが各々２０°以下であれば、第１放音兼排水孔Ｈ１の外方側の縁部２１を共鳴室Ｃの周面１１ｋｉの最下部に露出させることができる。これにより、上記ばらつきに影響されずに第１放音兼排水孔Ｈ１のスムーズな排水性が確保可能となる。 In this case, especially in this embodiment, the edge 22 on one side and the edge 23 on the other side of the first sound emitting/drainage hole H1 are each opened by 20 degrees with respect to the bisector L. Therefore, if the variation in the mounting angle in one direction and the other direction is 20 degrees or less, the outer edge 21 of the first sound emitting/drainage hole H1 is placed at the outermost edge of the circumferential surface 11ki of the resonance chamber C. Can be exposed at the bottom. Thereby, smooth drainage performance of the first sound emitting/drainage hole H1 can be ensured without being affected by the above-mentioned variations.
その上、本実施形態の放音兼排水孔Ｈ１～Ｈ３は複数有って、共鳴室周方向に互いに間隔をおいて配置されている。これにより、その何れの放音兼排水孔Ｈ１～Ｈ３を共鳴室Ｃの周面１１ｋｉの最下部に配置しても（換言すれば、ケース１０を前記した縦置き取付姿勢・一方側及び他方側の横置き取付姿勢のうちのどの姿勢で取付けても）支障なく水Ｗを排出可能となるため、ケース１０の支持板Ｆに対する取付位置の自由度が高められる。 Moreover, there are a plurality of sound emitting/draining holes H1 to H3 in this embodiment, which are arranged at intervals in the circumferential direction of the resonance chamber. As a result, even if any of the sound emitting/draining holes H1 to H3 are placed at the lowest part of the circumferential surface 11ki of the resonance chamber C (in other words, the case 10 is mounted in the vertical mounting position, one side and the other side). Since the water W can be discharged without any problem even if the case 10 is mounted in any of the horizontal mounting positions, the degree of freedom in the mounting position of the case 10 with respect to the support plate F is increased.
更に各々の放音兼排水孔Ｈ１～Ｈ３の、共鳴室径方向で外方側の縁部２１は、内方側の縁部２４よりも、共鳴室周方向で幅広に形成される。これにより、各放音兼排水孔Ｈ１の開口面積を特別に大きくすることなく、各放音兼排水孔Ｈ１と共鳴室Ｃの周面１１ｋｉとの連通部を周方向に拡張できるため、共鳴室Ｃの周面１１ｋｉに沿って流下する水Ｗを各放音兼排水孔Ｈ１より効率よくスムーズに排出可能となる。 Furthermore, the outer edge 21 of each of the sound emitting and draining holes H1 to H3 in the radial direction of the resonance chamber is formed wider in the circumferential direction of the resonance chamber than the inner edge 24. As a result, the communication portion between each sound emission/drainage hole H1 and the circumferential surface 11ki of the resonance chamber C can be expanded in the circumferential direction without particularly increasing the opening area of each sound emission/drainage hole H1. The water W flowing down along the circumferential surface 11ki of C can be efficiently and smoothly discharged from each sound emission/drainage hole H1.
更にまた本実施形態では、ケースカバー１２の、各放音兼排水孔Ｈ１～Ｈ３が開口する正面１５が、各放音兼排水孔Ｈ１～Ｈ３の、共鳴室径方向で外方側の縁部２１に連なる低位面部１５ｌと、その他の縁部２２～２４に連なる高位面部１５ｈとを有していて、それら低位面部１５ｌと高位面部１５ｈとの間に形成される段差部１５ｓが、外方側の縁部２１の両端より各放音兼排水孔Ｈ１～Ｈ３の、共鳴室周方向で一方側の縁部２２及び他方側の縁部２３からそれぞれ離れる側に延びている。これにより、各放音兼排水孔Ｈ１～Ｈ３からケース１０の正面１５側に達した水Ｗは、図８に示すように、表面張力の働きで段差部１５ｓを伝ってスムーズに流出可能となるから、各放音兼排水孔Ｈ１～Ｈ３の排水性を更に高めることができる。 Furthermore, in the present embodiment, the front surface 15 of the case cover 12 where each of the sound emission and drainage holes H1 to H3 opens is located at the outer edge of each of the sound emission and drainage holes H1 to H3 in the radial direction of the resonance chamber. 21, and a high surface portion 15h that connects to the other edges 22 to 24, and a step portion 15s formed between the low surface portion 15l and the high surface portion 15h is formed on the outer side. The sound emitting/draining holes H1 to H3 extend away from the edge 22 on one side and the edge 23 on the other side in the circumferential direction of the resonance chamber from both ends of the edge 21. As a result, the water W that has reached the front side 15 of the case 10 from each of the sound emitting and draining holes H1 to H3 can smoothly flow out through the stepped portion 15s due to surface tension, as shown in FIG. Therefore, the drainage performance of each of the sound emitting and drainage holes H1 to H3 can be further improved.
以上、本発明の実施の形態について説明したが、本発明は、前記実施形態に限定されるものではなく、特許請求の範囲に記載された本発明を逸脱することなく種々の設計変更を行うことが可能である。 Although the embodiments of the present invention have been described above, the present invention is not limited to the embodiments described above, and various design changes can be made without departing from the scope of the invention described in the claims. is possible.
例えば、前記実施形態では、ブザー装置Ｂが自動車等の車両に設置使用するものを示したが、本発明のブザー装置を車両以外の各種装置に設置使用してもよい。 For example, in the embodiment described above, the buzzer device B is installed and used in a vehicle such as an automobile, but the buzzer device of the present invention may be installed and used in various devices other than vehicles.
また前記実施形態では、放音兼排水孔Ｈ１の、共鳴室径方向で外方側の縁部２１を、共鳴室Ｃの周面１１ｋｉに略沿って延びる円弧状に形成したものを示したが、共鳴室Ｃの周面１１ｋｉに略沿って延びる形状であれば円弧状に限定されず、例えば、共鳴室Ｃの周面１１ｋｉに略沿って延びる直線状であってもよく、但し、この場合は、放音兼排水孔Ｈ１～Ｈ３からのスムーズな排水を確保するために、外方側の縁部２１を、共鳴室Ｃの周面１１ｋｉと正面視で接する位置又はそれよりも低位置に形成することが望ましい。 Furthermore, in the embodiment described above, the outer edge 21 of the sound emitting/draining hole H1 in the radial direction of the resonance chamber is formed into an arc shape extending approximately along the circumferential surface 11ki of the resonance chamber C. , the shape is not limited to an arc shape as long as it extends approximately along the circumferential surface 11ki of the resonance chamber C; for example, it may have a linear shape extending approximately along the circumferential surface 11ki of the resonance chamber C; however, in this case, In order to ensure smooth drainage from the sound emitting/drainage holes H1 to H3, the outer edge 21 is placed at a position where it contacts the circumferential surface 11ki of the resonance chamber C in front view, or at a position lower than that. It is desirable to form.
また前記実施形態では、ブザー装置Ｂの支持体（支持板Ｆ）への取付姿勢を複数の取付姿勢より選択可能とすべく放音兼排水孔Ｈ１～Ｈ３をケース１０に複数設けたものを示したが、本発明では、放音兼排水孔が単一であってもよく、その場合は、ブザー装置を支持体に一定姿勢でのみ取付けられる。 Furthermore, in the embodiment described above, a plurality of sound emitting/draining holes H1 to H3 are provided in the case 10 so that the mounting position of the buzzer device B on the support body (support plate F) can be selected from a plurality of mounting positions. However, in the present invention, there may be a single sound emitting and draining hole, and in that case, the buzzer device can be attached to the support only in a fixed posture.
Ｂ・・・・・ブザー装置
Ｃ・・・・・共鳴室
Ｈ１～Ｈ３・・放音兼排水孔としての第１～第３放音兼排水孔
１０・・・・ケース
１１ｋｉ・・周面としての、共鳴室形成壁部の内周面
１５・・・・ケース正面としてのケースカバーの正面
１５ｈ・・・ケース正面の高位面部
１５ｌ・・・ケース正面の低位面部
１５ｓ・・・ケース正面の段差部
２１・・・・放音兼排水孔の、共鳴室径方向で外方側の縁部
２２・・・・放音兼排水孔の、共鳴室周方向で一方側の縁部
２３・・・・放音兼排水孔の、共鳴室周方向で他方側の縁部
２４・・・・放音兼排水孔の、共鳴室径方向で内方側の縁部
３０・・・・圧電ブザー
３１・・・・振動板
B...Buzzer device C...Resonance chambers H1 to H3...First to third sound emission/drainage holes 10 as sound emission/drainage holes...Case 11ki...As the circumferential surface Inner peripheral surface 15 of the wall forming the resonance chamber...Front surface 15h of the case cover as the front of the case...High surface portion 15l of the front of the case...Low surface portion 15s of the front of the case...Steps on the front of the case Part 21... Edge 22 of the sound emission/drainage hole on the outer side in the resonance chamber radial direction... Edge 23 of the sound emission/drainage hole on one side in the resonance chamber circumferential direction...・Edge 24 of the sound emission/drainage hole on the other side in the circumferential direction of the resonance chamber...Edge 30 of the sound emission/drainage hole on the inner side in the radial direction of the resonance chamber...Piezoelectric buzzer 31・...diaphragm
Claims (7)
前記共鳴室（Ｃ）は略円筒孔状に形成され、
前記放音兼排水孔（Ｈ１～Ｈ３）の、共鳴室径方向で外方側の縁部（２１）が、前記共鳴室（Ｃ）の周面（１１ｋｉ）に対し共鳴室軸方向で隣接し且つ該周面（１１ｋｉ）に沿って延びるように形成され、
前記放音兼排水孔（Ｈ１～Ｈ３）は、直径５ミリ以上の円を取り囲めるサイズに形成され、
前記放音兼排水孔（Ｈ１～Ｈ３）の、共鳴室周方向で一方側の縁部（２２）と他方側の縁部（２３）とが、共鳴室径方向で外方に向かうにつれて徐々に離れるように開いていて、該放音兼排水孔（Ｈ１～Ｈ３）の共鳴室周方向の二等分線（Ｌ）に関して線対称に形成されていることを特徴とするブザー装置。 A resonance chamber (C) and a piezoelectric buzzer (30) with a diaphragm (31) facing the resonance chamber (C) are disposed in the case (10), and the piezoelectric buzzer (30) emits sound. and a buzzer device in which the case (10) is provided with sound emission/drainage holes (H1 to H3) which also serve as draining water from the resonance chamber (C),
The resonance chamber (C) is formed in a substantially cylindrical hole shape,
The outer edges (21) of the sound emission and drainage holes (H1 to H3) in the radial direction of the resonance chamber are adjacent to the circumferential surface (11ki) of the resonance chamber (C) in the axial direction of the resonance chamber. and is formed to extend along the circumferential surface (11ki),
The sound emitting and drainage holes (H1 to H3) are formed in a size that can surround a circle with a diameter of 5 mm or more ,
The edge (22) on one side and the edge (23) on the other side in the circumferential direction of the resonance chamber of the sound emission/drainage holes (H1 to H3) gradually move outward in the radial direction of the resonance chamber. A buzzer device characterized in that the sound emitting/draining holes (H1 to H3) are opened so as to be separated from each other and are formed line-symmetrically with respect to a bisector (L) in the circumferential direction of the resonance chamber.
前記共鳴室（Ｃ）は略円筒孔状に形成され、
前記放音兼排水孔（Ｈ１～Ｈ３）の、共鳴室径方向で外方側の縁部（２１）が、前記共鳴室（Ｃ）の周面（１１ｋｉ）に対し共鳴室軸方向で隣接し且つ該周面（１１ｋｉ）に沿って延びるように形成され、
前記放音兼排水孔（Ｈ１～Ｈ３）は、直径５ミリ以上の円を取り囲めるサイズに形成され、
前記放音兼排水孔（Ｈ１～Ｈ３）の、共鳴室径方向で外方側の縁部（２１）が内方側の縁部（２４）よりも、共鳴室周方向で幅広であることを特徴とするブザー装置。 A resonance chamber (C) and a piezoelectric buzzer (30) with a diaphragm (31) facing the resonance chamber (C) are disposed in the case (10), and the piezoelectric buzzer (30) emits sound. and a buzzer device in which the case (10) is provided with sound emission/drainage holes (H1 to H3) which also serve as draining water from the resonance chamber (C),
The resonance chamber (C) is formed in a substantially cylindrical hole shape,
The outer edges (21) of the sound emission and drainage holes (H1 to H3) in the radial direction of the resonance chamber are adjacent to the circumferential surface (11ki) of the resonance chamber (C) in the axial direction of the resonance chamber. and is formed to extend along the circumferential surface (11ki),
The sound emitting and drainage holes (H1 to H3) are formed in a size that can surround a circle with a diameter of 5 mm or more,
The outer edge (21) in the radial direction of the resonance chamber of the sound emission/drainage holes (H1 to H3) is wider in the circumferential direction of the resonance chamber than the inner edge (24). Features a buzzer device.
前記共鳴室（Ｃ）は略円筒孔状に形成され、
前記放音兼排水孔（Ｈ１～Ｈ３）の、共鳴室径方向で外方側の縁部（２１）が、前記共鳴室（Ｃ）の周面（１１ｋｉ）に対し共鳴室軸方向で隣接し且つ該周面（１１ｋｉ）に沿って延びるように形成され、
前記放音兼排水孔（Ｈ１～Ｈ３）は、直径５ミリ以上の円を取り囲めるサイズに形成され、
前記ケース（１０）の、前記放音兼排水孔（Ｈ１～Ｈ３）が開口する正面（１５）は、該放音兼排水孔（Ｈ１～Ｈ３）の、共鳴室径方向で外方側の縁部（２１）に連なる低位面部（１５ｌ）と、その他の縁部（２２～２４）に連なる高位面部（１５ｈ）とを有しており、
前記低位面部（１５ｌ）と前記高位面部（１５ｈ）との間に形成される段差部（１５ｓ）が、該外方側の縁部（２１）の両端より前記放音兼排水孔（Ｈ１～Ｈ３）の、共鳴室周方向で一方側の縁部（２２）及び他方側の縁部（２３）からそれぞれ離れる側に延びていることを特徴とするブザー装置。 A resonance chamber (C) and a piezoelectric buzzer (30) with a diaphragm (31) facing the resonance chamber (C) are disposed in the case (10), and the piezoelectric buzzer (30) emits sound. and a buzzer device in which the case (10) is provided with sound emission/drainage holes (H1 to H3) which also serve as draining water from the resonance chamber (C),
The resonance chamber (C) is formed in a substantially cylindrical hole shape,
The outer edges (21) of the sound emission and drainage holes (H1 to H3) in the radial direction of the resonance chamber are adjacent to the circumferential surface (11ki) of the resonance chamber (C) in the axial direction of the resonance chamber. and is formed to extend along the circumferential surface (11ki),
The sound emitting and drainage holes (H1 to H3) are formed in a size that can surround a circle with a diameter of 5 mm or more,
The front surface (15) of the case (10) where the sound emission/drainage holes (H1 to H3) open is located at the outer edge of the sound emission/drainage holes (H1 to H3) in the radial direction of the resonance chamber. It has a low surface portion (15l) connected to the portion (21) and a high surface portion (15h) connected to the other edge portions (22 to 24),
A stepped portion (15s) formed between the low surface portion (15l) and the high surface portion (15h) is connected to the sound emitting/drainage holes (H1 to H3) from both ends of the outer edge (21). ), the buzzer device extends away from one edge (22) and the other edge (23) in the circumferential direction of the resonance chamber.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004170511A (en) | 2002-11-18 | 2004-06-17 | Anden | Buzzer |
| JP2010237473A (en) | 2009-03-31 | 2010-10-21 | Anden | Piezoelectric buzzer |
| JP2015038575A (en) | 2013-08-19 | 2015-02-26 | アンデン株式会社 | Piezoelectric buzzer |
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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 |
| JPH10313499A (en) * | 1997-05-12 | 1998-11-24 | Taiyo Yuden Co Ltd | Piezoelectric acoustic device |
| JP5589902B2 (en) * | 2011-03-04 | 2014-09-17 | アンデン株式会社 | Piezoelectric buzzer |
| US10531170B2 (en) * | 2016-09-01 | 2020-01-07 | Panasonic Intellectual Property Management Co., Ltd. | Loudspeaker device and movable-body apparatus equipped with same |
| CN109599086B (en) * | 2019-01-25 | 2020-07-14 | 汉得利（常州）电子股份有限公司 | High sound pressure level buzzer with gathering water drainage type sounding hole |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004170511A (en) | 2002-11-18 | 2004-06-17 | Anden | Buzzer |
| JP2010237473A (en) | 2009-03-31 | 2010-10-21 | Anden | Piezoelectric buzzer |
| JP2015038575A (en) | 2013-08-19 | 2015-02-26 | アンデン株式会社 | Piezoelectric buzzer |
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| CN113674726B (en) | 2024-05-31 |
| JP2021179576A (en) | 2021-11-18 |
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