CN102024451A

CN102024451A - Piezoelectric buzzer and manufacture method thereof

Info

Publication number: CN102024451A
Application number: CN 201010560960
Authority: CN
Inventors: 陈慧胜
Original assignee: NINGBO KEPO ELECTRONICS Ltd
Current assignee: NINGBO KEPO ELECTRONICS Ltd
Priority date: 2010-11-26
Filing date: 2010-11-26
Publication date: 2011-04-20

Abstract

The invention discloses a piezoelectric buzzer and a manufacture method thereof, and the piezoelectric buzzer comprises a housing and a buzzing piece arranged in the housing, wherein at least two through holes running through inside and outside are arranged on the housing, a welding piece which is embedded on the housing is arranged in the housing on the periphery of the through holes, the welding leg of the welding piece penetrates through the housing, two poles of the buzzing piece correspond to the through holes in different positions respectively and the welding piece on the periphery of the through holes and a conductive adhesive is arranged in the through holes and used for conducting the welding pieces and the two poles of the buzzer. When in injection molding of the housing, the positions of the through holes running through the inside and the outside are well designed, and the welding piece is embedded and molded in the housing once; and when in assembly, only the buzzing piece needs to be placed in the housing, the two poles of the buzzing piece correspond to the through holes on the housing respectively, and then the conductive adhesive is injected through the through holes from the outside of the housing, thereby respectively cementing the two poles of the buzzing piece with the welding piece, and enabling the two poles of the buzzing piece and the welding leg, which extends out of the housing, of the welding piece to be in the conducting state at the time of energization. The piezoelectric buzzer is simple in structure and convenient for assembly, and can avoid the assembly quality problem.

Description

Piezoelectric buzzer and preparation method thereof

Technical field

The present invention relates to a kind of hummer production technology, particularly a kind of piezoelectric buzzer and preparation method thereof.

Background technology

Chinese patent ZL94116357.1 discloses a kind of piezoelectric buzzer, and its piezoelectric diaphragm is fixed in the box body and by two metal lead wire welding backs and draws from bonnet.This structural relation, its assembling process of fixing, weld, drawing is pretty troublesome, and causes quality problems such as rosin joint, sealing-off easily, and particularly during mass industrialized production, quality more be cannot say for sure card; And, also be difficult to realize the production flowing water of robotization because operation is complicated.

Summary of the invention

The objective of the invention is to provide in order to solve above-mentioned the deficiencies in the prior art a kind of simple in structure, easy to assembly, can avoid piezoelectric buzzer that produces the assembly quality problem and preparation method thereof.

To achieve these goals, a kind of piezoelectric buzzer that the present invention is designed, comprise housing and place the interior piezo of housing, it is characterized in that at the through hole that is provided with perforation inside and outside at least two on the housing, in the housing of bore periphery, be provided with and be embedded on the housing, and leg is piercing in housing weld tabs outward, and the through hole of corresponding diverse location and the weld tabs of this bore periphery are distinguished in the two poles of the earth of piezo, is provided with the conducting resinl at conducting weld tabs and piezo the two poles of the earth in through hole.Described piezo is made up of substrate, ceramics and silver coating, and substrate and silver coating place the both sides of ceramics respectively.

Piezoelectric buzzer provided by the invention, described housing can be square, are provided with the through hole that connects inside and outside four on four angles of square casing, inlay to be provided with the weld tabs that communicates in twos in the housing of bore periphery, and the leg of weld tabs is piercing in outside the housing.

Described housing also can be circle, and centre in circular shell and periphery are respectively equipped with the inside and outside through hole that connects, and inlays to be provided with its leg and to be piercing in weld tabs outside the housing in the housing of bore periphery.

The method for making of above-mentioned described piezoelectric buzzer provided by the invention, it is characterized in that when the housing injection moulding, the lead to the hole site that is interlinked to the outside in designing, with the disposable embedding and injection molding of weld tabs in housing, the leg of weld tabs stretches out outside the housing, during assembling, as long as piezo is placed in the housing, the two poles of the earth of piezo are corresponding with through hole on the housing respectively, outside housing, inject conducting resinl then by through hole, the two poles of the earth that make piezo respectively with the weld tabs gummed, thereby make the two poles of the earth of piezo and the leg that weld tabs stretches out outside housing when switching on, be in conducting state.

The piezoelectric buzzer that the present invention obtains, simple in structure, easy to assembly, can avoid producing the assembly quality problem; When assembling, need only piezo is placed in the housing, outside housing, inject the assembling that conducting resinl is promptly finished integral product then by through hole, simplified assembling process greatly, also easy design automation assembling line, reduce labour intensity and production cost, also improved production efficiency and product quality.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 inlays the weld tabs structural representation on embodiment 1 bottom;

Fig. 3 is embodiment 1 a piezo structural representation;

Fig. 4 is that embodiment 1 is embedded in the weld tabs structural representation in the housing;

Fig. 5 is embodiment 2 structural representations;

Fig. 6 inlays the weld tabs structural representation on embodiment 2 bottoms.

Among the figure: housing 1, loam cake 2, piezo 3, conducting resinl 4, bottom 5, weld tabs 6, through hole 7, substrate 8, ceramics 9, silver coating 10, leg 11.

Embodiment

The present invention is further described below in conjunction with drawings and Examples.

Embodiment 1:

As shown in Figure 1, a kind of piezoelectric buzzer that present embodiment provides, comprise housing 1 and the piezo 3 that places in the housing 1, housing 1 is made up of loam cake 2 and bottom 5, as Fig. 2, shown in Figure 4, be provided with the through hole 7 that connects inside and outside four on the position, four angles of the bottom 5 of housing 1, be provided with the weld tabs 6 that is embedded on the bottom 5 and communicates in twos in the bottom 5 of through hole 7 peripheries, the leg 11 of weld tabs 6 is piercing in outside the bottom 5; As Fig. 1, shown in Figure 3, described piezo 3 is made up of substrate 8, ceramics 9 and silver coating 10, substrate 8 and silver coating 10 place the both sides of ceramics 9 respectively and form the two poles of the earth of piezo 3, the weld tabs 6 of corresponding through hole 7 and this through hole 7 peripheries is distinguished at the two poles of the earth of piezo 3, is provided with the conducting resinl 4 at conducting weld tabs 6 and piezo 3 the two poles of the earth in through hole 7.

The method for making of the described piezoelectric buzzer that present embodiment provides, be when bottom 5 injection mouldings, through hole 7 positions that are interlinked to the outside in designing, with weld tabs 6 disposable embedding and injection moldings in bottom 5, the leg 11 of weld tabs 6 stretches out outside the bottom 5, during assembling, as long as piezo 3 is placed in the bottom 5, the two poles of the earth of piezo 3 are corresponding with through hole 7 on the bottom 5 respectively, outside bottom 5, inject conducting resinl 4 then by through hole 7, the two poles of the earth that make piezo 3 respectively with weld tabs 6 gummeds, thereby make the two poles of the earth of piezo 3 and the leg 11 that weld tabs 6 stretches out outside bottom 5 when switching on, be in conducting state.

Embodiment 2:

As Fig. 5, shown in Figure 6, a kind of piezoelectric buzzer that present embodiment provides, described housing 1 is circular, centre in circular shell 1 and periphery are respectively equipped with the inside and outside through hole 7 that connects, in the housing 1 of through hole 7 peripheries, inlay and be provided with its leg 11 and be piercing in weld tabs 6 outside the housing 1, be provided with circular piezo 3 in housing 1, silver coating 10 in the middle of the piezo 3 and the substrate of periphery 8 form the two poles of the earth of piezo 3, are provided with the conducting resinl 4 at conducting weld tabs 6 and piezo 3 the two poles of the earth in through hole 7.

Claims

1. piezoelectric buzzer, comprise housing (1) and place the interior piezo (3) of housing (1), it is characterized in that on housing (1), being provided with the through hole (7) that connects inside and outside at least two, in the housing (1) of through hole (7) periphery, be provided with and be embedded on the housing (1), and leg (11) is piercing in the outer weld tabs (6) of housing (1), the two poles of the earth of piezo (3) are the through hole (7) and the peripheral weld tabs (6) of this through hole (7) of corresponding diverse location respectively, is provided with the conducting resinl (4) at conducting weld tabs (6) and piezo (3) the two poles of the earth in through hole (7).

2. piezoelectric buzzer according to claim 1 is characterized in that described piezo (3) is made up of substrate (8), ceramics (9) and silver coating (10), and substrate (8) and silver coating (10) place the both sides of ceramics (9) respectively.

3. piezoelectric buzzer according to claim 1 and 2, it is characterized in that described housing (1) is for square, on four angles of square casing (1), be provided with the through hole (7) that connects inside and outside four, inlay in the housing (1) of through hole (7) periphery and be provided with the weld tabs (6) that communicates in twos, the leg (11) of weld tabs (6) is piercing in outside the housing (1).

4. piezoelectric buzzer according to claim 1 and 2, it is characterized in that described housing (1) is for circular, centre in circular shell (1) and periphery are respectively equipped with the inside and outside through hole (7) that connects, and inlay to be provided with its leg (11) and to be piercing in weld tabs (6) outside the housing (1) in the housing (1) of through hole (7) periphery.

5. method for making that requires described piezoelectric buzzer according to aforesaid right, it is characterized in that when the housing injection moulding, the lead to the hole site that is interlinked to the outside in designing, with the disposable embedding and injection molding of weld tabs in housing, the leg of weld tabs stretches out outside the housing, during assembling, as long as piezo is placed in the housing, the two poles of the earth of piezo are corresponding with through hole on the housing respectively, outside housing, inject conducting resinl then by through hole, the two poles of the earth that make piezo respectively with the weld tabs gummed, thereby make the two poles of the earth of piezo and the leg that weld tabs stretches out outside housing when switching on, be in conducting state.