KR200269920Y1 - the piezoceramic buzzer with the piezoelectric effect - Google Patents

Abstract

The present invention relates to a piezoelectric buzzer, which is a kind of electronic component having a pronunciation function using the principle of the piezoelectric effect.

The present invention provides a piezoelectric buzzer (1) having a function of piezoelectric effect and piezoelectric effect, the weight (3a; 3b; 3c; 3d) of the function of detecting vibration and shaking, and the vibration and shaking of the weight The stress absorbing portion 40b which obtains the physical force generated while being bumped into and the flow portion 40c or the hook structure 40a that allow the flow to flow in all directions are added to the case 40 of the piezoelectric buzzer 1. It has a function of outputting a piezoelectric sensor for vibration detection by the piezoelectric effect action to the piezoelectric buzzer 10, which is installed in the side portion and provided with only the pronunciation means by the conventional piezoelectric effect effect. It relates to a piezoelectric buzzer (1) having a vibration detection function.

The effect of the present invention is to have the effect of reducing the manufacturing cost of the product that requires the function of detecting vibration and pronunciation or alarm (alarm) at the same time.

Description

Piezoelectric buzzer with a piezoelectric effect {the piezoceramic buzzer with the piezoelectric effect}

The present invention is a technical field of piezoceramic buzzer, which is a kind of electronic component that receives an electrical signal and exerts a pronunciation function by the action of piezoelectric effect.

The conventional piezoceramic buzzer 10 receives an electrical signal and exhibits only a pronunciation function due to the piezoelectric reverse effect.

Inner side of a resonance case of a piezoceramic buzzer 10, an electronic component that performs only a sounding function by a conventional piezoelectric effect. And on the outer side, a structure in which the stress of physical action due to vibration and shaking is transmitted to the piezoceramic element (aka piezoceramic element), thereby providing a piezoelectric effect from the piezoceramic element. A piezoceramic buzzer (1) characterized by having two functions at the same time by outputting piezoelectricity generated by a result, and detecting vibration and pronunciation function. At the same time it is a technical field of the invention with the purpose of reducing the manufacturing cost of the required product.

For reference, as a product or a product requiring the above two functions at the same time, a vibration detection burglar alarm, an impact detection alarm device, an automobile rapid deceleration alarm, a washing machine dehydration eccentric rotation detection switch, a pedometer The throwing sound may be a toy that is operated by an impact.

To summarize the terminology of the electrical action to be covered in the technical field and specification of the present invention and known theories as follows.

First, referring to FIG. 7 attached below, the piezoelectric effect and the piezoelectric effect of the piezoceramic element 2 will be described.

Crystals exhibiting pyroelectric phenomena are subjected to physical stresses such as external strains or tensile forces in any direction, resulting in polarization within them and polarization charges on their cross-sections. Electromagnetism occurs, and this electrical polarization is proportional to the stress. This phenomenon is called the piezoelectric effect, or piezoelectric phenomena, and the polarization charges appearing at this time are called pieezoelec tricity, and crystal, tourmaline, roselle salt, BaTiO ₃ series porcelain, PZT porcelain, and the like are representative materials exhibiting the piezoelectric effect described above, and the piezoceramic element as shown in FIG. When the physical stress S is applied to the piezoceramic element 2, the guide of the galvanometer 20 is moved because of the electric polarization in the interior thereof. It can be seen that a polarized charge has occurred, and in electrical terms, it is called a piezoelectric effect.

On the other hand, when an electrical signal is applied to the crystal exhibiting the piezoelectric effect, a stress of mechanical vibration proportional to it is generated, and this phenomenon is called a piezoelectric reverse effect, and the piezoceramic element as shown in FIG. When an alternating current electrical signal is applied to the piezoceramic element 2, mechanical vibration is generated in a direction corresponding to the polarity, and the vibration of the vibration corresponding to the alternating current signal having a predetermined amplitude is accompanied by a resonance case. By acting it is to perform the pronunciation function.

On the other hand, the configuration of the piezoceramic element 2 commonly employed in the piezoceramic buzzer is a piezoceramic element plate 2a and an electrode (as shown in Fig. 7C in a sectional view and a plan view). 2d), a piezoceramic element plate (also called a piezoelectric thin plate) 2a having electrodes attached to both surfaces, comprising a diaphragm 2b of an electrode and an adhesive 2c, which is provided by attaching to a thin metal diaphragm 2b. As a piezoelectric vibrator, which is a kind of electrical component, generally, the entire thickness of the piezoceramic element element plate 2a is used in the form of a disc having a dimension of about 0.2 to 1 mm.

6 (A), (B), which show the structure of a conventional piezoceramic buzzer 10 for sounding only, which exhibits only the piezoelectric effect described above. The following description will be made based on (C) and (D).

6A and 6B show that a piezoceramic element 2 in which an input terminal 12 of an electrical signal is soldered is housed in a silicon in a horizontally resonating case 42. Fig. 11 shows a perspective view and a cross-sectional view of a horizontally arranged piezoceramic buzzer 10, which is constructed using a soft adhesive such as (11).

6 (C) and 6 (D) show that a piezoceramic element 2 in which an input terminal 12 of an electric signal is soldered is housed in a vertically resonant case 43 with silicon. Figure 11 is a perspective view and a cross-sectional view of a vertically disposed piezoceramic buzzer 10, characterized in that it is configured using a soft adhesive such as (11), the manufacturing cost is cheaper than the horizontally disposed piezoceramic buzzer and printed circuit board In general, the washing machine uses a urgent molding method because the urethane molding process is performed on the circuit board.

For reference, the piezoceramic buzzer has a low electrical noise and low power consumption due to the recent miniaturization of electronic devices. Thus, the piezoceramic buzzer replaces the electronic coil speaker, which is a conventional pronunciation means, The remarkable development of processing technology and process technology is the fact that it is adopted in most electric and electronic products because of its excellent characteristics and low cost, and nowadays, it is essential to employ in all products requiring pronunciation.

In the above description, in order to simplify the expression on the specification such as the terminology and the names of the components will be summarized as follows.

Hereinafter, 'piezoceramic buzzer' is abbreviated as' piezoelectric buzzer ',' piezoceramic element 'is abbreviated as' piezoelectric element' and 'electrode and diaphragm' is described as' Abbreviated as 'diaphragm', and abbreviated as 'case' while kanji and spelling of 'resonance case' are omitted, and 'piezoelectric effect' and 'piezoelectric effect' The term 'electro-polarization' and 'electric polarization' and 'polarization charge' are described by omitting Chinese characters, while piezoelectricity is described by omitting Chinese characters and spelling.

An object of the present invention is to stress a piezoelectric element in a resonant case of a piezoelectric buzzer, which is an electronic component that performs only a sounding function by a conventional piezoelectric effect, in which the physical action of vibration or shaking is applied directly to the piezoelectric element or as a transmission medium. By adding this structure to the transfer action, the piezoelectric generated by the piezoelectric effect from the piezoelectric element is configured to be output, it has a function of outputting an electrical signal capable of detecting vibration or shaking and a conventional pronunciation function That is, it is an object of the present invention to provide a piezoelectric buzzer having a combination of a pronunciation function of the piezoelectric effect and a vibration detection function of the piezoelectric effect.

1 (A), (B), (C) is a partial perspective view and a weight cross-sectional view showing an embodiment of a piezoceramic buzzer of the piezoelectric element horizontal arrangement method of the present invention

(A), (B) is a partial perspective view and a cross-sectional view showing a modified example of the piezoceramic buzzer of the piezoelectric element horizontal arrangement method of the present invention.

Figure 3 (A), (B) is a partial perspective view and a cross-sectional view showing a modified embodiment of the piezoceramic buzzer of Figure 2 of the present invention

(A), (B), (C), (D), (E), (F), (G), (H) is a cross-sectional view and a perspective view of a modified embodiment of the weight of the present invention

(A), (B), (C) and (D) are perspective and cross-sectional views of a conventional piezoceramic buzzer.

(A), (B), and (C) are cross-sectional views and plan views of the electrical action of piezoceramic elements.

<Explanation of symbols for main parts of drawing>

1. Piezoelectric buzzer with vibration detection function

2. Piezoceramic element, piezoelectric element

2a. Piezoceramic elements 2b. Diaphragm electrode

3. Weight (3a; 3b; 3c, 3d) 3a. Ball of weight

3b. Weight Ball Ball Bar 3c. Liquidity ball of weight

3d. Hook bar of weights 10. Conventional piezoceramic buzzer

11. Piezoceramic element fixing adhesive

12. Input terminal of electric signal 20. Galvanometer

40. Case of piezoceramic buzzer of the present invention

40a. Weight Weight Hook Part Seating Flow Part

40b, 40e, 40d. Impact Weight Absorption of Weight Weight

40c. Provide weight weight fluidity Seating part of the ball

42. Conventional Horizontal Piezoceramic Buzzer Case

ST. Stress SD. Pronunciation

The present invention provides a ball seating flow portion that provides a resonant case of a piezoelectric buzzer, a weight having a ball provided as a mass body such as ceramic iron, and a structure that can flow in all directions. A loop and hook structure that provides fluidity is integrally formed in the case, and weight is flowed to one side of the piezoelectric element or the resonant case when vibration is caused by vibration. The stress absorbing portion (omit a kanji below) for absorbing mechanical force while being beaten is formed integrally with the piezoelectric buzzer case, so that the piezoelectric force generated by the piezoelectric effect is detected when the vibration is detected. It is to provide a piezoelectric buzzer that has a sensing function to combine the vibration caused by the piezoelectric effect.

Hereinafter, with reference to the drawings of Figures 1, 2, 3, 4 attached to a preferred embodiment of the present invention as follows.

1, (A), (B), (C) (D) is a perspective view and a cross-sectional view of an embodiment of a piezoelectric buzzer in which the piezoelectric element 2 is horizontally arranged, which has a vibration sensing function and a pronunciation function according to the present invention. As shown,

Figure 1 (A) shows a partial perspective view (A) and a partially enlarged perspective view (B) of the piezoelectric buzzer of the piezoelectric element 2 is arranged horizontally, having a vibration detection function and a pronunciation function according to the present invention In one thing,

Piezoelectric element 2 is horizontally accommodated in the piezoelectric buzzer case 40 to perform the sounding function by the piezoelectric reverse effect, while detecting vibration or shaking at one side of the case 40, that is, the piezoelectric effect. In order to obtain a stress of the stress absorbing portion that receives the physical force generated by the weight (3a) hit by the vibration or shaking detection is to be made in the upper space of the inner side edge of the case 40 In laying weight weight,

The weight is a mass body ball (BALL; omitted spelling) portion 3a having characteristics such as ceramic or iron, a weight seating ball (3c) that provides fluidity to add weight shake, and weight weight The neck part 3b which is the extension connection part of the ball 3a and the weight seating ball 3c is provided integrally,

Absorption of stress generated by the vibration or shaking of the weights 3a and 3c described above is carried out by the cylindrical flange portion 40d on which the piezoelectric element 2 is seated in the piezoelectric buzzer case 40. Provided in one space between the outer flanges 40e,

The weight portion (3a; 3c) is characterized in that the flow portion 40c formed in the form of a hole penetrating so as to flow in all directions by vibration or shaking is provided on the upper side of the piezoelectric buzzer case (40), The piezoelectric buzzer of the present invention, in which the piezoelectric element 2 is horizontally arranged, which combines the functions of the piezoelectric effect and the piezoelectric reverse effect, is shown in perspective view.

Figure 1 (B) is a perspective view showing an enlarged portion of the flow portion 40c that is provided in the form of a through hole to flow in all directions by the vibration or shaking of the present invention,

In order to obtain the action of the piezoelectric effect in the upper main portion of the piezoelectric buzzer case 40, that is, the vibration or shaking, the weight portion 3a; 40c) In accommodating the structure, the structure has a through hole 40c1 larger than the size of the seating ball 3c of the weight and a through hole 40c3 smaller than the seating ball 3c of the weight. It consists of a structure that is connected by a square through groove 40c2 having a wider width than the portion 3b, while passing through the large through hole 40c1 of the flow portion through a square through hole 40c1. The assembly flow method is provided by moving along 40c2 and seating in the small through hole 40c3, that is, a seating flow of weight to allow the weight to be seated in the flow part in the 'A' direction indicated by the arrow. Bones characterized by providing wealth The principal part of an example of an invention is shown partially expanded in a perspective view.

(C) and (D) of FIG. 1 are shown in perspective and cross-sectional views showing an example of the weights described in FIGS. 1A and 1B.

The weight is a mass body, and a ball (BALL; omitted spelling) portion 3a of a weight having a characteristic such as ceramic or iron has a triangular cylindrical shape; The weight seating ball 3c which provides fluidity to add weight to swing has a spherical shape; The three elements 3a; 3b; 3c are integrally formed in a round cylindrical shape so that the neck portion 3b, which is an extended connection portion of the weight weight ball 3a and the weight seating ball 3c, has fluidity in all directions. An example of the weight of the present invention, which is characterized in that the configuration is provided as shown in a perspective view (C) and a cross-sectional view.

Figure 2 (A), (B) is a perspective view and a cross-sectional view showing a modified embodiment of the piezoelectric buzzer having a vibration detection function and a pronunciation function according to the present invention,

Figure 2 (A) is a perspective view of a piezoelectric buzzer of the piezoelectric element 2 is horizontally arranged, having a vibration detection function and a pronunciation function according to the present invention,

When the vibration occurs, the stress absorbing portion 40b is integrally attached to an outer portion of the piezoelectric buzzer case 40 in the form of an open box, so that the weights 3a and 3d collide in all directions by vibration or shaking. Provides a space for absorbing the generated stress to transfer to the piezoelectric element, and a hook-shaped flow portion (40a) is integrally received on the upper surface so as to flow in an additional direction when the vibration occurs,

The weight is in the form of a triangular cylinder (3a) having a mass of a ceramic or iron material, while the seating portion of the weight on the floating hook portion has a ring (3d) form two elements (3a; 3d) ) Is provided as a unitary,

The above weights 3a and 3d; A stress absorbing portion 40b; The hook-shaped flow portion 40a that provides fluidity while accommodating the ring 3d portion of the weight weight is configured to be integrally formed in the case 40 of the piezoelectric buzzer, and the structure of the vibration sensing function is integrated in the piezoelectric buzzer. An alternative embodiment of the present invention, which is characterized in that it is accommodated as shown in a perspective view.

2 (B) is a perspective view of a piezoelectric buzzer having a vibration sensing function and a pronunciation function according to the present invention, the piezoelectric buzzer of the horizontal arrangement method, as shown in FIG. It is shown in order to more clearly express the description of the perspective view.

3 (A) and (B) show a modified example combining the embodiments of FIG. 1 and FIG. 2, which is an embodiment of the present invention, as a perspective view (A) and a cross-sectional view (B), respectively. The summary of the components is as follows.

The structure of the seating ball, which provides the weight to swing in all directions when the vibration or shaking is detected in the weight, has taken the structure of the ring 3d of FIG. 2 as a technical configuration, and accommodates the seating ball of the weight While the flow providing fluidity takes the hook structure 40a of FIG. 2 as its technical configuration, the stress absorber receives the physical force generated by the impact of the weight weight 3a for performing the piezoelectric effect. An example of a modification of the combination of the construction techniques such that the) part is made in the upper surface space of the inner one side edge of the case 40 of FIG. 1 is shown in a perspective view (A) and a cross-sectional view (B).

The supplementary description of the cross-sectional view of FIG. 3B is as follows.

As a part of the inside of the piezoelectric buzzer case 40, the piezoelectric element 2 is fixed to the adhesive furnace 11 and serves as a cover of the cylindrical flange 40e which resonates during the pronunciation operation and the piezoelectric buzzer. The space of the outer cylindrical flange (40d) of the case 40 provides the function of the main portion to absorb the stress of the physical force generated during the detection of vibration or shaking, while the weight (3a) on the vertical upper surface of the space ), Ie, a structure that is suspended, that is, flows in all directions by vibrating or shaking, hits the flange surface of the space, absorbs its physical force, is transmitted to the piezoelectric element, and the piezoelectric power is proportional to the physical force stress. It is output to the formation terminal 12, and shows the perspective view of FIG. 3 (A) which is a modified example of this invention which has such a structure in cross section.

(A), (B), (C), (D), (E), (F), (G), and (H) of FIG. 4 are the weights described with reference to FIGS. 1 and 2 and 3 above. An example of the modification of the weight is shown as a cross-sectional or perspective view as follows.

Figure 4 (A) is a fluid mass so as to be shaken in all directions to be seated on the fluid weight providing portion (40c) of the cylindrical weight weight (3a) and the weight additional case 40 is provided by a material such as ceramic or iron Bar (3b) for receiving a ball-shaped seating weight (c) of the ball-shaped weight to provide a predetermined interval is configured to maintain a right angle, assembling assembly or all of the same material The modified embodiment of the weight of the present invention is characterized in that it is provided by being processed integrally to the cross-sectional view.

4 (B) is flowable so as to be seated on the flow weight providing portion 40c of the cylindrical weight of the cylindrical body is provided by a material such as ceramic or iron, and the weight-adding case 40 is shaken in all directions Bar (3b) for receiving the seating flow portion (3d) of the ring-shaped weight of the weight provided at a predetermined interval is configured to maintain a right angle, assembling assembly or all of the same material The modified embodiment of the weight of the present invention is characterized in that it is provided by being processed integrally to the cross-sectional view.

4 (C) is to be seated on the flow-providing portion (40c) of the column-shaped weight weight (3a) having a polygonal body that is provided by a material such as ceramic or iron and the weight-added case (40) to be shaken in all directions. Bars (3b) for receiving the hemispherical weight (3c) seating flow portion of the weight to provide a fluid so as to be configured at a predetermined interval is configured to maintain a right angle, assembling assembly or all of the same material An example of a modified embodiment of the weight weight of the present invention, which is provided by being processed in one piece, is shown in cross section.

4 (D) is placed on the fluid weight portion (3c) of the sphere-shaped weight weight (3), which is a mass body provided by a material such as ceramic or iron, and the fluid providing portion (40c) of the weight-adding case (40) to be shaken in all directions. The bar 3b, which receives the seating flow portion 3d of a ring-shaped weight, provides a fluid at a predetermined interval, and is configured to maintain a right angle. An example of a modified embodiment of the weight weight of the present invention, which is provided by being integrally processed with the same material, is shown in cross section.

4 (E) is flowable so as to be seated on the fluidity providing portion 40c of the spherical weight (3a) and the weight-adding case 40, which is a mass body provided from a material such as ceramic or iron, and shaken in all directions Bar (3b) for receiving the ball seating flow ball (3c) of the spherical weight to provide a predetermined interval is configured to maintain a right angle, assembling or assembling all made of the same material integrally An example of a modified embodiment of the weight weight of the present invention, which is provided by being processed, is shown in cross section.

Figure 4 (F) is fluidity so that it can be shaken in all directions by being fitted to the hook portion (40a) of the spherical weight weight (3a) and the weight addition case 40 which is a mass body provided from a material such as ceramic or iron Bars (3b) for receiving the seating flow portion (3d) of the weight of the opening ring shape provided to be provided at a predetermined interval is configured to maintain a right angle, the joint assembly or all the same material As an example, a modified embodiment of the weight weight of the present invention is characterized in that it is provided by being processed in one piece.

Figure 4 (G) is fluidity so that it can be shaken in all directions by being fitted to the hook portion (40a) of the weight of the cone-shaped weight (3a), which is a mass body provided by a material such as ceramic or iron A modified embodiment of the weight weight of the present invention is shown in perspective and cross-sectional view, characterized in that the seating flow portion 3d of the ring-shaped weight which is opened is provided with the same material and is integrally processed. It is.

Figure 4 (H) is fluidity so that it can be shaken in all directions by being fitted to the hook portion (40a) of the cylindrical weight weight (3a) and mass-adding case 40, which is a mass body provided by a material such as ceramic or iron A modified embodiment of the weight weight of the present invention is shown in perspective and cross-sectional view, characterized in that the seating flow portion (3d) of the weight of the open ring-shaped weight is provided in one piece made of the same material. It is.

1 and 2 and 3 and 4 described above, in the technical idea of the present invention, the receiving position of the weight and the shape of the weight can be modified as long as the knowledge of the technical field of the present invention, Change the location of; To accommodate a plurality of weights in one piezoelectric buzzer; Vibration is achieved by modifying the mass body shape of the weight weight, the shape of the bar, the ring of the fluidity providing part and the shape of the ball, or combining the deformation thereof, or applying the deformation to the piezoelectric buzzer in which the piezoelectric elements are vertically disposed. Combining the sensing function, after all, can be said to fall within the scope of the technical idea of the present invention.

That is, in the piezoelectric buzzer having the action of the piezoelectric effect and the piezoelectric effect, the weight weight (3a; 3b; 3c; 3d) of the function of detecting vibration or shaking; Recesses 40a and 40c that provide fluidity of the weight weight; The center of the present invention is that the absorber 40b; 40d; 40e of the stress generated by the shaking of the weight at the time of vibration is accommodated in one side space inside or outside the piezoelectric buzzer case 40. It is an element technology.

The effect of the present invention is to have the effect of reducing the manufacturing cost of the product that requires the function of detecting vibration and pronunciation function at the same time,

Vibration detection and alarm function can be removed from the pedometer at the same time to eliminate the vibration detection part, no need to configure the shock sensor separately from the sound toy, the car's rapid deceleration alarm The tilt angle detection part of the tilt can be omitted, the shock sensor can be omitted from the vehicle antitheft device, and the unbalance detection switch due to the tilt of the laundry can be omitted during the dehydration process of the washing machine. When the piezoelectric buzzer 1 having the vibration sensing function of the manufacturing cost reduction can be natural.

Claims (2)

The piezoelectric element 2 having the electrical terminal 12 formed in the resonant case is fixed to the piezoelectric buzzer, which is an electrical component that is integrally formed by fixing the adhesive 11 with the adhesive 11. In In order to obtain the stress of the piezoelectric effect on the piezoelectric buzzer case 40, a stress absorbing part provided with the physical force generated by the collision of the weight weight 3a when the vibration is detected is formed at the inner edge of the inner side of the case 40. In the space, and in placing the weight, The weight weight ball 3a provided as a mass body; A seating ball 3c portion of the weight that provides fluidity to add weight; The neck portion 3b, which is an extended connection portion of the weight weight ball and the weight seating ball 3c, is provided as an integral part, Cylindrical flange portion 40d on which the piezoelectric element 2 is seated in the piezoelectric buzzer case 40 by the absorber of the stress generated by the vibration or shaking of the weights 3a and 3c described above. 40 is provided to be made in one side space between the outer flange (40e), Sounding function and vibration characterized in that the weight portion (3c) is provided on the side of the piezoelectric buzzer case (40c) configured in the form of a hole penetrating so as to flow in all directions when detecting the vibration (3a; 3c) Piezoelectric buzzer with detection function. 2. A body portion (3a) having a weight-adding cylindrical form and a flow portion (3d) having a ring form are integrally machined and provided according to claim 1, A piezoelectric buzzer having a sounding function and a vibration sensing function, wherein the stress absorbing portion 40b is formed at an outer portion of the piezoelectric buzzer case 40 in the form of an open box.