CN2272604Y - Sealed type electromagnetic buzzer - Google Patents
Sealed type electromagnetic buzzer Download PDFInfo
- Publication number
- CN2272604Y CN2272604Y CN 96223791 CN96223791U CN2272604Y CN 2272604 Y CN2272604 Y CN 2272604Y CN 96223791 CN96223791 CN 96223791 CN 96223791 U CN96223791 U CN 96223791U CN 2272604 Y CN2272604 Y CN 2272604Y
- Authority
- CN
- China
- Prior art keywords
- base plate
- lower cover
- stem
- fixed
- terminal block
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to an electromagnetic buzzer. A pin of the buzzer is fixed on a circuit board; a circuit line is fixed on the lower end face of a bottom board; a core post is fixedly connected with the bottom board; a coil is sheathed on the core post; two line ends of the coil are connected with the pin; a magnetic ring is fixed on the upper end face of the bottom board to form a bottom board component which is arranged in a lower cover. An upper cover is covered on the lower cover; a pronunciation piece is arranged on the upper end face of the lower cover; the distance between the core post and the pronunciation piece is adjustable before the core post and the pronunciation piece are packed. When assembled, the buzzer can emit normal voice under the condition that the precision of each component is lower. The buzzer has the advantages of simple processing, low cost and high rate of finished products.
Description
The utility model relates to a kind of electromagnetic type hummer.
Existing closed type electromagnetic type hummer (see figure 1), its shell (1a) is an integral structure, the place, middle and upper part of shell (1a) has step, and metallic support cover (8a) matches with shell (1a), and pronunciation sheet (2a) is contained in metallic support cover (8a) and goes up on the transverse plane; Be fixed with leading foot (9a) on the terminal block (7a), terminal block (7a) is bonded and fixed on the lower surface of base plate (6a).Stem stem (3a) is weldingly fixed on the upper surface of base plate (6a), and coil (4a) is enclosed within outer and its terminals of stem stem (3a) and passes base plate (6a) and link to each other with leading foot (9a).Magnet ring (5a) is bonded and fixed on the upper surface of base plate (6a); Base plate (6a) upper surface contacts with the lower surface of metallic support cover (8a), and base plate (6a) matches with shell (1a), and shell (1a) bottom is fixed by epoxy encapsulation.This structure by metallic support cover (8a) the lower surface and the upper end between the height B of the precision of distance A and stem stem (3a) guarantee the precision of the distance C between sheet (2a) and stem stem (3a) upper surface.The magnetic force that magnet ring (5a) and coil (4a) are produced all has strict requirement simultaneously.So the difficulty of processing height of product, cost is also higher, and distance can not be regulated before encapsulation between pronunciation sheet and post core.
The purpose of this utility model is that distance adjustable closed type electromagnetic type hummer before encapsulation between a kind of handling ease, pronunciation sheet and post core is provided.
The technical scheme that realizes the utility model purpose is (referring to Fig. 2), this hummer has leading foot (9), terminal block (7), base plate (6), magnet ring (5), coil (4), stem stem (3) and pronunciation sheet (2), leading foot (9) is fixed on the terminal block (7), fixedly connected with base plate (6) in the upper surface of terminal block (7), magnet ring (5) fixedly is bonded on the upper surface of base plate (6), stem stem (3) is fixed on the central part of the upper surface of base plate (6), coil (4) is enclosed within outside the stem stem (3), and its terminals pass base plate (6) and link to each other with leading foot (9) by terminal block (7), pronunciation sheet (2) is located at the top of stem stem (3), its design feature is, this hummer also has loam cake (1) and lower cover (8), the medial surface of the ring body (81) of the convex of lower cover (8) is corresponding with the lateral surface of magnet ring (5), match with the inboard face of cylinder of lower cover (8) lower end in the face of cylinder, the outside of base plate (6), pronunciation sheet (2) is located on the upper surface of lower cover (8), match with the face of cylinder, the outside of lower cover (8) upper end in the inboard face of cylinder of the lower end of loam cake (1), the middle part of loam cake (1) is provided with vocal hole (11), lower cover (8) is fixedlyed connected with loam cake (1), is provided with encapsulating material between terminal block (7) and the lower cover (8).
Above-mentioned terminal block (7) is a circuit board, leading foot (9) is riveted on the circuit board (7), circuit board (7) is bonded and fixed on the upper surface of base plate (6), the material of base plate (6) and stem stem (3) is the blunt iron of electrician, stem stem (3) is weldingly fixed on the upper surface of base plate (6), match with the inboard face of cylinder of lower cover (8) in the face of cylinder, the outside of base plate (6), the lateral surface of magnet ring (5) contacts with the medial surface of the ring body (81) of lower cover (8) convex.
Be provided with adjustable for height space A before encapsulation between the lower surface of the ring body (81) of the convex of the upper surface of above-mentioned base plate (6) and lower cover (8).
The utlity model has positive effect: because of this hummer stem stem and pronunciation distance between the sheet before encapsulation adjustable, so when assembling, the size of adjusting space A can reach the purpose of adjusting voice effect, even thereby the machining precision of each relevant parts is not high, also can make the stem stem and the spacing of pronunciation sheet obtain adjusting by adjusting the size of space A, thereby obtain voice effect preferably, not only cost is lower, and is easy to process, and yield rate is higher.
Fig. 1 is the structural representation of existing closed type electromagnetic type hummer.
Fig. 2 is a structural representation of the present utility model.
Below in conjunction with drawings and Examples the utility model is further described.
Embodiment
See Fig. 2,
Making basic as shown in the figure profile with the injection moulding of MPPO plastic granule is columniform loam cake (1) and lower cover (8).Pronunciation sheet (2) is fixed on by the platinum molybdenum sheet spot welding of roundlet on the platinum molybdenum sheet of great circle and makes.Magnet ring (5) is made by the permanent magnetism rare earth material.Stem stem (3) and base plate (6) are made by electrical pure iron, stem stem (3) be shaped as right cylinder, base plate (6) be shaped as the plectane body, and the plate body of base plate (6) is provided with the hole that the terminals that can supply coil (4) pass through.Terminal block (7) is a printed circuit board.Coil (4) is made on stem stem (3) by enameled wire.
Stem stem (3) is fixed on the central part on the upper surface of base plate (6) by spot welding, two lead-in wire the end of a thread of coil (4) stretch out downwards as the hole that terminals pass base plate (6), and magnet ring (5) is bonded and fixed on the upper surface of base plate (6) by cementing agent.2 purple leading foots made of copper (9) riveted and fixed and is welded on 2 the end of a thread of coil (4) respectively on the corresponding leading foot (9) on circuit board (7), circuit board (7) is bonded and fixed on the lower surface of base plate (6) again.Thereby formation base plate part.
The base plate part that said fixing is had each relevant part is pressed into the lower cover (8) from the below of lower cover (8), places pronunciation sheet (2) on the upper surface of lower cover (8), covers loam cake (1), promptly gets semi-manufacture.
Semi-manufacture are inserted in the special test socket by its leading foot (9), test circuit provides test signal by socket to semi-manufacture, distance A between the upper surface by adjusting base plate (6) and convex ring body (81) lower surface of lower cover (8), thereby make the distance C between pronunciation sheet (2) and stem stem (3) upper surface obtain adjusting, obtain best voice effect until the hummer semi-manufacture.
Make semi-manufacture leading foot (9) then up, 618 epoxy resin are poured into encapsulation oven dry in the cavity of lower cover (8) and terminal block (7), base plate part is fixed in the lower cover (8).Loam cake (1) is covered on lower cover (8), and the medial surface of loam cake (1) lower end contacts with the lateral surface of lower cover (8) upper end, and reinforces by cementing agent, is fixed together.
Because of magnet ring (5) is made for permanent magnet material, so it is recessed towards stem stem (3) that pronunciation sheet (2) is attracted by magnet ring (5), when leading foot (9) has current signal to pass through, and coil (4) is when producing the magnetic field opposite with magnet ring (5) direction, the total magnetic field to the pronunciation sheet (2) attractive force weaken, thereby cause the vibration and sound from vocal hole (11).
Claims (3)
1, a kind of closed type electromagnetic type hummer, has leading foot (9), terminal block (7), base plate (6), magnet ring (5), coil (4), stem stem (3) and pronunciation sheet (2), leading foot (9) is fixed on the terminal block (7), fixedly connected with base plate (6) in the upper surface of terminal block (7), magnet ring (5) fixedly is bonded on the upper surface of base plate (6), stem stem (3) is fixed on the central part of the upper surface of base plate (6), coil (4) is enclosed within outside the stem stem (3), and its terminals pass base plate (6) and link to each other with leading foot (9) by terminal block (7), pronunciation sheet (2) is located at the top of stem stem (3), it is characterized in that, this hummer also has loam cake (1) and lower cover (8), the medial surface of the ring body (81) of the convex of lower cover (8) is corresponding with the lateral surface of magnet ring (5), match with the inboard face of cylinder of lower cover (8) lower end in the face of cylinder, the outside of base plate (6), pronunciation sheet (2) is located on the upper surface of lower cover (8), match with the face of cylinder, the outside of lower cover (8) upper end in the inboard face of cylinder of the lower end of loam cake (1), the middle part of loam cake (1) is provided with vocal hole (11), lower cover (8) is fixedlyed connected with loam cake (1), is provided with encapsulating material between terminal block (7) and the lower cover (8).
2, closed type electromagnetic type hummer according to claim 1, it is characterized in that, terminal block (7) is a circuit board, leading foot (9) is riveted on the circuit board (7), circuit board (7) is bonded and fixed on the upper surface of base plate (6), the material of base plate (6) and stem stem (3) is the blunt iron of electrician, stem stem (3) is weldingly fixed on the upper surface of base plate (6), match with the inboard face of cylinder of lower cover (8) in the face of cylinder, the outside of base plate (6), the lateral surface of magnet ring (5) contacts with the medial surface of the ring body (81) of lower cover (8) convex.
3, closed type electromagnetic type hummer according to claim 1 and 2 is characterized in that, is provided with adjustable for height space A before encapsulation between the lower surface of the ring body (81) of the convex of the upper surface of base plate (6) and lower cover (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96223791 CN2272604Y (en) | 1996-09-28 | 1996-09-28 | Sealed type electromagnetic buzzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96223791 CN2272604Y (en) | 1996-09-28 | 1996-09-28 | Sealed type electromagnetic buzzer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2272604Y true CN2272604Y (en) | 1998-01-14 |
Family
ID=33902920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96223791 Expired - Fee Related CN2272604Y (en) | 1996-09-28 | 1996-09-28 | Sealed type electromagnetic buzzer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2272604Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7050578B1 (en) | 1999-10-22 | 2006-05-23 | Citizen Electronics Co., Ltd. | Sound producing device for an electronic instrument such as a telephone |
| CN1332827C (en) * | 2003-02-12 | 2007-08-22 | 卡森尼可关精株式会社 | Metter apparatus for vehicles |
| CN103236843A (en) * | 2013-05-08 | 2013-08-07 | 杭州百事特电子有限公司 | Impulse waveform driver and electromagnetic buzzer |
-
1996
- 1996-09-28 CN CN 96223791 patent/CN2272604Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7050578B1 (en) | 1999-10-22 | 2006-05-23 | Citizen Electronics Co., Ltd. | Sound producing device for an electronic instrument such as a telephone |
| CN100437749C (en) * | 1999-10-22 | 2008-11-26 | 株式会社西铁城电子 | Sound producing apparatus such as telephone |
| CN1332827C (en) * | 2003-02-12 | 2007-08-22 | 卡森尼可关精株式会社 | Metter apparatus for vehicles |
| CN103236843A (en) * | 2013-05-08 | 2013-08-07 | 杭州百事特电子有限公司 | Impulse waveform driver and electromagnetic buzzer |
| CN103236843B (en) * | 2013-05-08 | 2015-09-02 | 杭州百事特电子有限公司 | A kind of impulse waveform driver and electromagnetic buzzer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |