CN216527995U

CN216527995U - Buzzer suitable for electric bicycle

Info

Publication number: CN216527995U
Application number: CN202121165291.1U
Authority: CN
Inventors: 孙茂梅; 汤立
Original assignee: Tianjin Xinyang Electronic Co ltd
Current assignee: Tianjin Xinyang Electronic Co ltd
Priority date: 2021-05-27
Filing date: 2021-05-27
Publication date: 2022-05-13
Anticipated expiration: 2031-05-27

Abstract

The utility model provides a buzzer suitable for an electric bicycle, comprising: the piezoelectric ceramic piece is used for generating vibration under the condition of external voltage excitation, the piezoelectric ceramic piece fixing groove is used for bearing and fixing the piezoelectric ceramic piece, and intermittently contacts with the piezoelectric ceramic piece under the excitation of external voltage to form buzzing sound, the piezoelectric ceramic piece fixing groove is provided with a through hole, the shell comprises an upper cover and a lower cover, the edge of the lower cover is provided with a sound outlet, the lower cover is arranged at the lower side of the piezoelectric ceramic piece fixing groove, and is detachably connected with the piezoelectric ceramic piece fixing groove, the lower cover is provided with an annular boss at the edge of the inner side of the sound outlet, a sound returning cavity is formed inside the annular boss, the height of the annular boss is smaller than that of the lower cover, the upper cover is detachably connected with the piezoelectric ceramic piece fixing groove, and the piezoelectric ceramic piece is a 35mm piezoelectric ceramic piece.

Description

Buzzer suitable for electric bicycle

Technical Field

The utility model belongs to the field, and particularly relates to a buzzer suitable for an electric bicycle.

Background

The buzzer is a sounding body of an electroacoustic transducer using a piezoelectric ceramic piece as the buzzer and is a core component of the buzzer. The piezoelectric buzzer has the characteristics of no radio frequency noise, low power consumption and the like, is paid much attention, has the advantages of small volume, light weight, low price and the like, and is widely applied to industries such as automobiles, intelligent household appliances, medical treatment, electric bicycles and the like in recent years, particularly the electric bicycle industry.

The piezoelectric buzzer is a sounding body using piezoelectric ceramic as an electroacoustic transducer, and the core of the device is a transduction piece which is formed by sticking a piezoelectric ceramic sheet on a metal sheet, namely a piezoelectric buzzer sheet. The characteristics of no radio frequency noise, low power consumption and the like of the piezoelectric buzzer make the piezoelectric buzzer be paid much attention and developed very quickly. The piezoelectric buzzer comprises a shell and a piezoelectric buzzer piece arranged inside the shell, wherein the piezoelectric buzzer piece is composed of a metal substrate and piezoelectric ceramics glued on the metal substrate, silver layer electrodes are respectively coated on the upper surface and the lower surface of the piezoelectric ceramics, and two metal wires which are respectively communicated with the metal substrate and the piezoelectric ceramics silver layer are welded on the piezoelectric buzzer piece.

In the process of realizing the utility model, the inventor finds the following technical problems: at present, a buzzer can meet requirements only when a certain decibel is achieved, and generally, the problem is solved by improving the decibel quantity of the buzzer in a voltage-improving mode. However, this method consumes a large amount of electricity, which is difficult to be implemented in an electric vehicle or an electric bicycle using a battery as an energy source.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to a buzzer for an electric bicycle, so as to solve the technical problem in the prior art that the sound decibel of the buzzer does not meet the set standard without increasing the voltage.

In order to achieve the purpose, the technical scheme of the utility model is realized as follows:

a buzzer adapted for use with an electric bicycle, comprising:

the piezoelectric ceramic piece is used for generating vibration under the condition of external voltage excitation, the piezoelectric ceramic piece fixing groove is used for bearing and fixing the piezoelectric ceramic piece, and intermittently contacts with the piezoelectric ceramic piece under the excitation of external voltage to form buzzing sound, the piezoelectric ceramic piece fixing groove is provided with a through hole, the shell comprises an upper cover and a lower cover, the edge of the lower cover is provided with a sound outlet, the lower cover is arranged at the lower side of the piezoelectric ceramic piece fixing groove, and is detachably connected with the piezoelectric ceramic piece fixing groove, the lower cover is provided with an annular boss at the edge of the inner side of the sound outlet, a sound returning cavity is formed inside the annular boss, the height of the annular boss is smaller than that of the lower cover, the upper cover is detachably connected with the piezoelectric ceramic piece fixing groove, and the piezoelectric ceramic piece is a 35mm piezoelectric ceramic piece.

Furthermore, the piezoelectric ceramic piece comprises a vibrating iron piece and a ceramic piece, and the ceramic piece is fixedly arranged on the vibrating iron piece.

Furthermore, the through hole corresponds to the center of the echo cavity.

Further, the piezoelectric ceramic plate fixing groove further includes: the sound transmission pipe is arranged corresponding to the through hole.

Furthermore, the upper surface of the upper cover and/or the lower surface of the lower cover are planes.

Furthermore, the lower cover is provided with at least two sound outlet holes, the sound outlet holes are arc-shaped, and the at least two sound outlet holes are uniformly distributed on the lower cover.

Furthermore, the piezoelectric ceramic piece fixing groove box and the sound transmission tube are of an integrally formed structure.

Furthermore, piezoceramics piece fixed slot upper surface edge be equipped with upper cover assorted upper bonding platform, piezoceramics piece fixed slot lower surface edge be equipped with lower cover assorted lower bonding platform.

Further, the upper cover further comprises: the piezoelectric ceramic piece fixing groove box is provided with a lug box matched with the lug.

Furthermore, the hanging lug and the hanging lug box are provided with wire through holes, and the size of each wire through hole is smaller than the overall size of each wire.

Compared with the prior art, the buzzer suitable for the electric bicycle has the following advantages:

according to the buzzer suitable for the electric bicycle, the piezoelectric ceramic piece fixing groove used for bearing and fixing the piezoelectric ceramic piece is set, the shell is provided with the upper cover and the lower cover, the piezoelectric ceramic piece fixing groove is provided with the through hole convenient for sound transmission, the lower cover is provided with the sound outlet, and the piezoelectric ceramic piece with the size of 35mm is selected and matched with the lower cover, the annular boss is arranged at the edge of the inner side of the sound outlet to form the sound returning cavity, so that the sound wave of the buzzing sound generated by the piezoelectric ceramic piece is reflected by the sound returning cavity to realize the directional transmission effect of the sound wave. So that the buzzing sound wave generates the effect of concentrated amplification and is finally transmitted out through the sound-emitting hole. The emitted buzzing sound can meet the sound decibel requirement under the condition of not increasing the voltage. Meanwhile, the piezoelectric ceramic piece can be set as a 35mm piezoelectric ceramic piece, and the output buzzing sound volume is further improved by utilizing the frequency characteristic of the piezoelectric ceramic piece.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 is a schematic overall structure diagram of a buzzer suitable for an electric bicycle according to an embodiment of the present invention;

fig. 2 is an exploded view of a buzzer for an electric bicycle according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a piezoelectric ceramic plate fixing groove in a buzzer for an electric bicycle according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a lower cover of a buzzer suitable for an electric bicycle according to an embodiment of the present invention.

Description of reference numerals:

1-piezoelectric ceramic piece fixing groove; 2-lower cover; 3-covering the cover; 4-hanging a lug; 5-ear hanging box; 6-a wire via; 7-piezoelectric ceramic plate; 8-a through hole; 9-an annular table; 10-a sound transmission tube; 11-upper bonding stage; 12-a lower bonding stage; 13-sound outlet; 14-annular boss; 15-echo chamber.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

Fig. 1 is a schematic overall structure diagram of a buzzer suitable for an electric bicycle according to an embodiment of the present invention; fig. 2 is an exploded schematic view of a buzzer for an electric bicycle according to an embodiment of the present invention, and referring to fig. 1 and 2, the buzzer for an electric bicycle may include: piezoceramics piece, piezoceramics piece fixed slot and shell, piezoceramics piece is used for producing the vibration under the external voltage arouses the condition, piezoceramics piece fixed slot is used for bearing fixedly piezoceramics piece to arouse the condition at piezoceramics piece at external voltage under with piezoceramics piece brace table intermittent type contacts, forms the buzzer sound, piezoceramics piece fixed slot is equipped with the through-hole, the shell includes upper cover and lower cover, the lower cover edge is equipped with the phonation hole, the lower cover set up in the downside of piezoceramics piece fixed slot, and with the connection can be dismantled to piezoceramics piece fixed slot, the lower cover is equipped with cyclic annular boss at the inboard edge in phonation hole, the inside chamber of returning the sound that forms of cyclic annular boss, the upper cover with the piezoceramics piece fixed slot can be dismantled the connection, piezoceramics piece is 35mm piezoceramics piece.

The existing piezoelectric buzzer sheet is structured by adhering a piezoelectric ceramic sheet to a metal substrate (generally, a copper sheet or a stainless steel sheet), and silver paste is printed on two surfaces of the piezoelectric ceramic sheet to serve as an electrode material. When a high-frequency alternating current signal is loaded to 2 electrodes (a silver surface electrode and a metal substrate electrode) on the buzzer, the piezoelectric ceramic piece generates corresponding regular geometric deformation due to the piezoelectric effect, and drives the metal substrate to vibrate. Optionally, the piezoelectric ceramic plate includes a vibrating iron plate and a ceramic plate, and the ceramic plate is fixedly disposed on the vibrating iron plate.

Fig. 3 is a schematic structural view of a piezoelectric ceramic plate fixing groove in a buzzer for an electric bicycle according to an embodiment of the present invention, and referring to fig. 3, in this embodiment, the piezoelectric ceramic plate fixing groove is provided with an annular table matching with the shape of the piezoelectric ceramic plate, the piezoelectric ceramic plate may be placed on the annular table, and when the metal substrate vibrates, the piezoelectric ceramic plate strikes the annular table and the outer edge of the piezoelectric ceramic plate fixing groove to form a buzzer sound.

Traditional bee calling organ is through being equipped with the phonate hole at the bottom surface of shell or upper surface, is convenient for transmit the buzzing sound to the external world, and the external world of being convenient for receives the buzzing sound. However, in this method, since the propagation direction of the buzzer sound wave is large, only a part of the buzzer sound wave can be propagated through the sound outlet, and thus the volume of the generated buzzer sound is small, and the sound decibel requirement set by the buzzer cannot be met.

To overcome the above problem, in the present embodiment, the corresponding buzzer structure is adjusted. Specifically, the housing may include an upper cover and a lower cover, fig. 4 is a schematic structural view of the lower cover in the buzzer for the electric bicycle according to the embodiment of the present invention, and referring to fig. 4, the lower cover is provided with a sound outlet, and the lower cover is disposed at a lower side of the piezoelectric ceramic plate fixing groove and detachably connected to the piezoelectric ceramic plate fixing groove. And the piezoelectric ceramic piece fixing groove is provided with a through hole. In this embodiment, because the lower cover is equipped with annular boss at the inboard edge of sound outlet, the buzz sound wave that the metal substrate vibrations produced is transmitted from the through-hole to the annular boss of lower cover with in the first cavity that piezoceramics piece fixed slot formed, most buzz sound wave is through first cavity bottom, after the echo chamber reflection that surrounds regional formation in the annular boss in the middle of the lower cover promptly, because the height of annular boss is less than piezoceramics piece fixed slot with the clearance height between the lower cover, the ring boss is crossed to the buzz sound wave for a large part, follow the sound outlet is spread out. After the primary reflection, the sound waves can be gathered near the sound outlet of the lower cover and are transmitted through the sound outlet. So that the sound outlet can distribute buzzing sound waves with stronger energy, and further realize effectively increasing the buzzing sound generated by the buzzer under the condition of keeping the original excitation voltage. In addition, because the existence of annular boss, can be in with the sound wave that some buzzers produced vibrate many times in the first cavity, can play partial time delay effect to can superpose with the buzzer sound wave of follow-up production, further strengthen the decibel number of the buzzing sound that the buzzer produced, realize under the unchangeable prerequisite of excitation voltage, improve the effect of the buzzing sound decibel that the buzzer produced.

In addition, the piezoelectric ceramic piece can be set to be a 35mm piezoelectric ceramic piece, and the vibration frequency of the piezoelectric ceramic piece can be adjusted to be consistent with the input voltage frequency by selecting the 35mm piezoelectric ceramic piece, so that the amplitude is improved, and the buzzer decibel is further improved. Meanwhile, the reflection frequency of the sound waves of the buzzing sound in the echo cavity can be combined, so that the decibel of the buzzing sound emitted from the sound outlet is further improved.

Optionally, the lower cover may be provided with at least two sound holes, and the sound holes are arc-shaped and evenly distributed on the lower cover. Optionally, the number of the sound outlet holes is 3, and the sound outlet holes are uniformly distributed along the outer side so as to surround the echo cavity. The interference to the echo cavity is avoided, and the leakage of the buzzing sound wave is prevented.

In addition, the piezoceramics piece fixed slot still includes: the sound transmission pipe is of a hollow structure and is arranged corresponding to the through hole. The through hole can correspond to the center of the echo cavity formed inside the annular boss. The acoustic pipe can with piezoceramics piece fixed slot structure as an organic whole utilizes the acoustic pipe can be with directional input of buzzer sound to the echo chamber to make the buzzer sound reflect in the echo chamber and shelter from, and then further strengthen the buzzer sound decibel.

In this embodiment, the upper surface of the upper cover and/or the lower surface of the lower cover of the buzzer may be a plane. Ultrasonic welding techniques are commonly employed in the manufacture of buzzers to ensure the integrity and hermeticity of the overall buzzer. Ultrasonic welding is carried out by converting 50/60 Hz current into 15, 20, 30 or 40KHz electric energy through an ultrasonic generator. The converted high-frequency electrical energy is converted again into mechanical motion of the same frequency by the transducer, and the mechanical motion is then transmitted to the welding head by a set of amplitude transformer devices which can change the amplitude. The horn transmits the received vibrational energy to the joint of the work pieces to be welded where it is frictionally converted to heat energy to melt the plastic. When carrying out ultrasonic bonding, need with upper cover and lower cover pressfitting put into the mould in, because the lower mould bottom surface is the plane, set up the bottom surface of upper cover and lower cover into the plane, be convenient for with the mould laminating, realize the effect that compresses tightly of upper cover and lower cover, promoted the ultrasonic bonding effect, and then promote whole bee calling organ's sealed effect.

In addition, piezoceramics piece fixed slot upper surface edge be equipped with upper cover assorted last bonding platform, piezoceramics piece fixed slot lower surface edge be equipped with lower cover assorted lower bonding platform. The upper bonding stage and the lower bonding stage can be firmly bonded together by ultrasonic welding. The overall sealing effect is improved.

Optionally, the upper cover further includes: the piezoelectric ceramic piece fixing groove box is provided with a lug box matched with the lug. Through setting up the hangers box, can conveniently install bee calling organ and electric bicycle fixed connection in electric bicycle's different positions according to actual need.

In addition, because the piezoelectric ceramic plate needs an external power supply, in this embodiment, the power line may be disposed in the wire through hole formed by the ear hanging ring and the ear hanging box. Optionally, the hanger is provided with an upper semicircular through hole, correspondingly, the hanger box is provided with a lower semicircular through hole matched with the upper semicircular through hole, a wire through hole is formed by matching the upper semicircular through hole and the lower semicircular through hole, the size of the wire through hole is smaller than the overall size of the wire, and the wire is deformed and blocked by pressing the hanger and the hanger box, so that the wire can be conveniently arranged, the overall sealing performance of the buzzer can be enhanced, and the waterproof purpose is realized.

According to the buzzer suitable for the electric bicycle, the piezoelectric ceramic piece fixing groove used for bearing and fixing the piezoelectric ceramic piece is set, the shell is provided with the upper cover and the lower cover, the piezoelectric ceramic piece fixing groove is provided with the through hole convenient for sound transmission, the lower cover is provided with the sound outlet, and the piezoelectric ceramic piece with the size of 35mm is selected and matched with the lower cover, the annular boss is arranged at the edge of the inner side of the sound outlet to form the sound returning cavity, so that the sound wave of the buzzing sound generated by the piezoelectric ceramic piece is reflected by the sound returning cavity to realize the directional transmission effect of the sound wave. So that the buzzing sound wave generates the effect of concentrated amplification and is finally transmitted out through the sound-emitting hole. The emitted buzzing sound can meet the sound decibel requirement under the condition of not increasing the voltage. Meanwhile, the piezoelectric ceramic piece can be set to be a 35mm piezoelectric ceramic piece, and the output buzzing sound volume is further improved by utilizing the frequency characteristic of the piezoelectric ceramic piece.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A buzzer suitable for an electric bicycle, comprising: the piezoelectric ceramic piece is used for generating vibration under the condition of external voltage excitation, the piezoelectric ceramic piece fixing groove is used for bearing and fixing the piezoelectric ceramic piece, and intermittently contacts with the piezoelectric ceramic piece under the condition of external voltage excitation to form a buzzing sound, the piezoelectric ceramic piece fixing groove is provided with a through hole, the shell comprises an upper cover and a lower cover, the edge of the lower cover is provided with a sound outlet, the lower cover is arranged at the lower side of the piezoelectric ceramic piece fixing groove, and is detachably connected with the piezoelectric ceramic piece fixing groove, the lower cover is provided with an annular boss at the edge of the inner side of the sound outlet, a sound returning cavity is formed inside the annular boss, the height of the annular boss is smaller than that of the lower cover, the upper cover is detachably connected with the piezoelectric ceramic piece fixing groove, and the piezoelectric ceramic piece is a 35mm piezoelectric ceramic piece.

2. The buzzer suitable for the electric bicycle according to claim 1, wherein the piezoelectric ceramic plate comprises a vibrating iron plate and a ceramic plate, and the ceramic plate is fixedly arranged on the vibrating iron plate.

3. The buzzer for an electric bicycle according to claim 1, wherein the through hole corresponds to the center of the echo chamber.

4. The buzzer suitable for an electric bicycle according to claim 3, wherein the piezoelectric ceramic plate fixing groove further comprises: the sound transmission pipe is arranged corresponding to the through hole.

5. The buzzer suitable for the electric bicycle as claimed in claim 1, wherein the upper surface and/or the lower surface of the upper cover is/are planar.

6. The buzzer suitable for electric bicycles of claim 3, wherein the lower cover is provided with at least two sound holes, the sound holes are arc-shaped, and the at least two sound holes are uniformly distributed on the lower cover.

7. The buzzer suitable for the electric bicycle according to claim 4, wherein the piezoelectric ceramic plate fixing groove box and the sound transmission tube are of an integrated structure.

8. The buzzer suitable for the electric bicycle according to claim 1, wherein the edge of the upper surface of the piezoelectric ceramic plate fixing groove is provided with an upper bonding platform matched with the upper cover, and the edge of the lower surface of the piezoelectric ceramic plate fixing groove is provided with a lower bonding platform matched with the lower cover.

9. The buzzer for an electric bicycle according to claim 1, wherein the upper cover further comprises: the piezoelectric ceramic piece fixing groove box is provided with a lug box matched with the lug.

10. The buzzer for an electric bicycle according to claim 9, wherein the lug and the lug box are provided with a wire through hole having a size smaller than an outer size of the wire.