阅读说明：本技术 一种无底盖压电蜂鸣器及其组装方法 (Piezoelectric buzzer without bottom cover and assembling method thereof ) 是由 严中田 廖伟南 于 2019-10-11 设计创作，主要内容包括：本发明涉及蜂鸣器,尤其是一种无底盖压电蜂鸣器及其组装方法；它包括外壳、蜂鸣片和插针,所述外壳设有三个凸耳,这三个凸耳等距设置,所述凸耳底面均设置有插槽,所述插槽内开设有卡扣,所述外壳中部凹陷形成有一圆槽,用于放置蜂鸣片,所述插针包括插片、卡头、针脚、弹片,所述插片侧面对应卡扣设置有卡头,所述插片顶部固定有针脚,所述插片侧边顶部固定有弹片,所述针脚和弹片电性连接,所述插片插入凸耳上的插槽内且卡头卡入卡扣内,所述弹片末端抵住圆槽内的蜂鸣片；本发明的产品结构非常简单,仅仅由外壳、蜂鸣片和插针组成,进一步降低生原材料成本。(The invention relates to a buzzer, in particular to a piezoelectric buzzer without a bottom cover and an assembling method thereof; the buzzer comprises a shell, a buzzer and a contact pin, wherein the shell is provided with three lugs which are arranged at equal intervals, the bottom surfaces of the lugs are provided with slots, buckles are arranged in the slots, a circular groove is formed in the middle of the shell in a concave mode and used for placing the buzzer, the contact pin comprises an inserting piece, a clamping head, a pin and an elastic piece, the side surface of the inserting piece is provided with the clamping head corresponding to the buckles, the top of the inserting piece is fixedly provided with the pin, the top of the side edge of the inserting piece is fixedly provided with the elastic piece, the pin is electrically connected with the elastic piece, the inserting piece is inserted into the slot on the lug, the clamping head is clamped into the; the product of the invention has a very simple structure, only consists of the shell, the buzzer and the contact pin, and further reduces the cost of raw materials.)

1. The utility model provides a no end cover piezoelectric buzzer which characterized in that: it includes shell, buzzing piece and contact pin, the shell is equipped with three lug, and this three lug equidistance sets up, the lug bottom surface all is provided with the slot, the buckle has been seted up in the slot, the sunken circular slot that is formed with in shell middle part for place buzzing piece, the contact pin includes inserted sheet, dop, stitch, shell fragment, the inserted sheet side corresponds the buckle and is provided with the dop, the inserted sheet top is fixed with the stitch, inserted sheet side top is fixed with the shell fragment, stitch and shell fragment electric connection, in the slot and the dop card that the inserted sheet inserted on the lug goes into the buckle, the shell fragment end supports the buzzing piece in the circular slot.

2. A bottomless piezoelectric buzzer in accordance with claim 1, wherein: the inserted sheet material is insulating resin.

3. A bottomless piezoelectric buzzer in accordance with claim 2, wherein: the buzzer comprises a copper sheet and a piezoelectric ceramic sheet, wherein the elastic sheet of one contact pin is propped against the copper sheet, and the elastic sheet of the other contact pin is propped against the piezoelectric ceramic sheet.

4. A bottomless piezoelectric buzzer according to claim 3, wherein: the elastic sheet and the copper sheet or the piezoelectric ceramic sheet are solidified through welding flux.

5. The bottomless piezoelectric buzzer of claim 4, wherein: and a sound transmission hole is formed in the circular groove of the shell.

6. An assembling method of a piezoelectric buzzer without a bottom cover is characterized in that: it comprises the following steps:

step one, the bottom surface of a shell is upward;

placing the buzzer in the circular groove of the shell, wherein the piezoelectric ceramic piece of the buzzer faces upwards;

inserting the inserting pieces of the two inserting pins into the slots on the two lugs respectively, and clamping the clamping heads into the buckles;

fourthly, the elastic sheet of one of the inserting sheets is abutted against the piezoelectric ceramic sheet of the buzzer, and the elastic sheet of the other inserting sheet is bent and folded to be abutted against the copper sheet on the periphery of the buzzer;

step five, welding the joint of the elastic sheet and the buzzer sheet firmly through welding flux;

and step six, performing power-on test, and discharging qualified products and reworking unqualified products.

7. The assembling method of a bottomless piezoelectric buzzer according to claim 6, wherein: the housing is coated with a protective lacquer.

8. The assembling method of a bottomless piezoelectric buzzer according to claim 6, wherein: glue is coated in the circular groove of the shell before the buzzer is placed.

Technical Field

The invention relates to a buzzer, in particular to a piezoelectric buzzer without a bottom cover and an assembling method thereof.

Background

Along with the progress of science and technology, the structure of the buzzer is more and more concise and more suitable for quick assembly. For example, chinese patent discloses a buzzer structure, patent No. 201820872590.0, in which: the plastic shell comprises a plastic shell, a buzzing piece, a lead, a pcb, pins, a buckling groove, shell notches, salient points and a plastic reverse buckle, wherein the three shell notches are distributed at equal intervals; the plastic shell gap is provided with a plastic back-off; one side of the pcb is provided with two pins, and the other side of the pcb is provided with two leads connected with the buzzer; three salient points are distributed on the outer side of the pcb at equal intervals. Novel bee calling organ stitch is through novel buckle structural design production, and the production man-hour that significantly reduces improves production efficiency, and at the customer end significantly reduced board phenomenon that falls.

Disclosure of Invention

In view of the disadvantages of the prior art, the present invention provides a piezoelectric buzzer without a bottom cover, and a method of securely mounting a buzzer piece on a housing without a bottom cover.

The technical scheme of the invention is as follows:

the utility model provides a no end cover piezoelectric buzzer which characterized in that: it includes shell, buzzing piece and contact pin, the shell is equipped with three lug, and this three lug equidistance sets up, the lug bottom surface all is provided with the slot, the buckle has been seted up in the slot, the sunken circular slot that is formed with in shell middle part for place buzzing piece, the contact pin includes inserted sheet, dop, stitch, shell fragment, the inserted sheet side corresponds the buckle and is provided with the dop, the inserted sheet top is fixed with the stitch, inserted sheet side top is fixed with the shell fragment, stitch and shell fragment electric connection, in the slot and the dop card that the inserted sheet inserted on the lug goes into the buckle, the shell fragment end supports the buzzing piece in the circular slot.

Specifically, the inserting piece is made of insulating resin. Preventing electric leakage.

Specifically, the buzzer piece comprises a copper sheet and a piezoelectric ceramic sheet, wherein the elastic sheet of one contact pin is abutted against the copper sheet, and the elastic sheet of the other contact pin is abutted against the piezoelectric ceramic sheet.

Specifically, the elastic sheet and the copper sheet or the piezoelectric ceramic sheet are solidified through welding flux.

Specifically, the circular groove of the shell is internally provided with a sound transmission hole, so that the sound is transmitted to the outer side of the shell after the buzzer sounds.

An assembling method of a piezoelectric buzzer without a bottom cover is characterized in that: it comprises the following steps:

step one, the bottom surface of a shell is upward;

placing the buzzer in the circular groove of the shell, wherein the piezoelectric ceramic piece of the buzzer faces upwards;

inserting the inserting pieces of the two inserting pins into the slots on the two lugs respectively, and clamping the clamping heads into the buckles;

fourthly, the elastic sheet of one of the inserting sheets is abutted against the piezoelectric ceramic sheet of the buzzer, and the elastic sheet of the other inserting sheet is bent and folded to be abutted against the copper sheet on the periphery of the buzzer;

step five, welding the joint of the elastic sheet and the buzzer sheet firmly through welding flux;

and step six, performing power-on test, and discharging qualified products and reworking unqualified products.

In some embodiments, the housing is coated with a protective lacquer. Improve the wear resistance and the appearance of the plastic shell.

In some embodiments, the round groove of the shell is coated with glue before the buzzer is placed, so that the fixation of the buzzer is further improved. The buzzer can be prevented from falling off even without the bottom cover.

The invention has the beneficial effects that: the product of the invention has a very simple structure, only consists of the shell, the buzzer and the contact pin, further reduces the cost of raw materials, and has the advantages that the assembly process is adaptively changed due to the simplified assembly, but as can be understood, the assembly difficulty does not need to be greatly improved, the efficiency is higher than that of the original multi-component assembly, and the production cost is not obviously increased.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the housing;

FIG. 3 is a schematic view of a buzzer;

FIG. 4 is a schematic diagram of a pin configuration;

fig. 5 is an assembly flow chart.

In the figure, 1, a housing; 2. a buzzer; 3. inserting a pin; 4. welding flux; 11. a lug; 12. a slot; 13. a circular groove; 14. a sound transmission hole; 21. a copper sheet; 22. piezoelectric ceramic plates; 31. inserting sheets; 32. clamping a head; 33. a stitch; 34. an elastic sheet.

Detailed Description

The following further describes embodiments of the present invention with reference to the accompanying drawings:

as shown in fig. 1 to 4, a cap-less piezoelectric buzzer, is characterized in that: it includes shell, buzzing piece and contact pin, the shell is equipped with three lug, and this three lug equidistance sets up, the lug bottom surface all is provided with the slot, the buckle has been seted up in the slot, the sunken circular slot that is formed with in shell middle part for place buzzing piece, the contact pin includes inserted sheet, dop, stitch, shell fragment, the inserted sheet side corresponds the buckle and is provided with the dop, the inserted sheet top is fixed with the stitch, inserted sheet side top is fixed with the shell fragment, stitch and shell fragment electric connection, in the slot and the dop card that the inserted sheet inserted on the lug goes into the buckle, the shell fragment end supports the buzzing piece in the circular slot.

The inserted sheet material is insulating resin. Preventing electric leakage.

The buzzer comprises a copper sheet and a piezoelectric ceramic sheet, wherein the elastic sheet of one contact pin is propped against the copper sheet, and the elastic sheet of the other contact pin is propped against the piezoelectric ceramic sheet.

The elastic sheet and the copper sheet or the piezoelectric ceramic sheet are solidified through welding flux.

The circular groove of the shell is internally provided with a sound transmission hole, so that sound is transmitted to the outer side of the shell after the buzzer sounds.