CN103137117A - Electromagnetic signal alarming device - Google Patents
Electromagnetic signal alarming device Download PDFInfo
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- CN103137117A CN103137117A CN2013100204983A CN201310020498A CN103137117A CN 103137117 A CN103137117 A CN 103137117A CN 2013100204983 A CN2013100204983 A CN 2013100204983A CN 201310020498 A CN201310020498 A CN 201310020498A CN 103137117 A CN103137117 A CN 103137117A
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- iron core
- fixed
- vibrating membrane
- cavity
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- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Abstract
The invention belongs to the field of signal alarming devices, and particularly provides an electromagnetic signal alarming device which utilizes a low voltage drive to obtain large sound pressure. The electromagnetic signal alarming device mainly comprises a base, an iron core, a vibration membrane, an electromagnetic coil, magnetic steel, a magnetic enhancing sheet and an upper cover. The base is provided with a collineation cavity, and the iron core is fixed in the collineation cavity of the base. The electromagnetic coil is fixed on the iron core, and the magnetic steel is fixed on the end face of the base and attached to the iron core. The magnetic enhance sheet is fixed with vibration membrane points to form a vibration set which is fixed on a step of the base through the edge of vibration membrane. The upper cover is fixedly connected with the base on the outer side of the vibration membrane set, and a coupling cavity is formed between the upper cover and the vibration membrane. A phase inversion cavity is arranged between the inner side of the base and the outer side of the iron core, and the collineation cavity is communicated with the phase inversion cavity through a gap disposed between the vibration membrane and the magnetic steel. The electromagnetic signal alarming device has the advantages of adopting injection molding integrated design, reducing bad loss, strengthening reliability, greatly improving sound pressure of products, and improving utilization rate of materials.
Description
Technical field
The invention belongs to information ring device field, specifically a kind of electromagnetic buzzer that utilizes low voltage drive to obtain larger acoustic pressure.
Background technology
Traditional information ring device base acoustic pressure under low voltage drive is low, being used on the alarm of household electrical appliance easily allows the people can't hear, it is 200810216499.4 electromagnetic buzzer patent of invention such as the disclosed patent No. of Patent Office of the People's Republic of China, it also carries out sounding by the Electromagnetic Drive vibrating diaphragm, but under the weak or equal voltage of voltage, because vibrating diaphragm directly contacts sounding with air, the sounding effect that causes this information ring device a little less than, be difficult to allow the people hear; This patent of invention contacts the full surface of contact into step with base due to vibrating membrane simultaneously, cause reducing the vibration area of vibrating membrane, so the vibration sounding effect weakens.
Summary of the invention
The problem to be solved in the present invention is to produce larger alarm sound if obtain larger acoustic pressure under low voltage or equal voltage, and a kind of electromagnetic buzzer is provided.
The invention provides following technical scheme:
electromagnetic buzzer, it mainly comprises base, iron core, vibrating membrane, solenoid, magnet steel, increase magnetic sheet and upper cover, base comprises the direct projection chamber, iron core is fixed in the direct projection chamber of base, solenoid is fixed on iron core, magnet steel is fixed on the base end face and is close to iron core, increase magnetic sheet and the fixing vibrating membrane group that forms of vibration film spot, the vibrating membrane group is fixed on the step of base by the vibrating membrane edge, upper cover is fixedly connected with base outside the vibrating membrane group, form coupler between upper cover and vibrating membrane, base inboard with iron core outside between be provided with a paraphase chamber, be communicated with gap between magnet steel by being located at vibrating membrane between direct projection chamber and paraphase chamber.
Described step is terraced steps.
Described magnet steel is alnico magnet.
The chamfering of described terraced steps is 45 °.
Advantage of the present invention is to adopt the design of integrated through injection molding, and advantage reduces the access times of glue, thereby has reduced the operation step of hummer, has reduced bad loss, has strengthened its reliability; Increase a paraphase chamber on the basis of traditional information ring device, reduces by a step surface area, the area of increase vibrating diaphragm sheet has improved the acoustic pressure of product greatly; Adopt alnico magnet to replace traditional magnetic of moulding, the SmCo magnet steel, thus the acoustic pressure that can regulate the information ring device is frequently, has improved the utilization factor of material.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is M place enlarged diagram in Fig. 1;
Fig. 3 is the acoustic pressure curve map of the present invention and old product.
Embodiment
as Fig. 1, shown in Figure 2, electromagnetic buzzer, it mainly comprises base 1, iron core 2, vibrating membrane 3, solenoid 4, magnet steel 5, increase magnetic sheet 6 and upper cover 7, sound hole 11 is arranged on the sidewall of base, base 1 comprises direct projection chamber 8, iron core 2 is fixed in the direct projection chamber 8 of base 1, solenoid 4 is fixed on iron core 2, magnet steel 5 is fixed on base 1 end face and is close to iron core 2, increase 3 fixing vibrating membrane groups that form of magnetic sheet 6 and vibrating membrane, this point is fixedly to form by spot welding, the vibrating membrane group is fixed on the step 1a of base 1 by vibrating membrane 3 edges, upper cover 7 is fixedly connected with base 1 outside the vibrating membrane group, form coupler 9 between upper cover 7 and vibrating membrane 3, be provided with a paraphase chamber 10 between the inboard and iron core of base 12 outsides, be communicated with gap between magnetic 5 steel by being located at vibrating membrane 3 between direct projection chamber 8 and paraphase chamber 10, vocal hole is located at base 1 side.
After connecting the 1.5Vo-p electric signal, the sound signal that oscillator produces is passed through solenoid, make solenoid produce magnetic field, vibrating membrane with increase magnetic sheet vibrating membrane group, periodicity vibration sounding under the interaction of solenoid and magnet steel, sound wave spreads to surrounding, force circulation of air when passing through the direct projection chamber when sound wave spreads again, acoustic energy is depressed into the paraphase chamber, sound wave can be through the paraphase chamber when diffusion simultaneously, this moment, sound wave promoted air, and acoustic energy spreads to coupler, and the acoustic energy of this moment will expand to be twice gets over greatly 3dB.When sound wave spreads to coupler, sound wave is through the polymerization of coupler, send to free found field through sound hole again, make it acoustic pressure larger, tonequality is simpler and more honest, and as shown in Figure 3, comparing does not originally have the information ring device acoustic pressure in paraphase chamber obviously to improve, in Fig. 3, A is acoustic pressure curve of the present invention, and B is the acoustic pressure curve of existing product.
Wherein, step is terraced steps, and the chamfering of terraced steps is generally 45.
Wherein, magnet steel is alnico magnet.
The big or small width in paraphase chamber is the frequency that volume determines electromagnetic buzzer, and the volume in direct projection chamber determines the frequency of electromagnetic buzzer equally, and it has been coupling that the direct projection chamber is communicated with the paraphase chamber.Their volume size is relevant with the frequency of electromagnetic buzzer.The oscillator frequency, the frequency that direct projection chamber coupling forms, the frequency that the coupling of paraphase cavity volume forms, the cooperation of three frequencies determines frequency range and the sound pressure level of electromagnetic buzzer.
Claims (4)
1. electromagnetic buzzer, it mainly comprises base, iron core, vibrating membrane, solenoid, magnet steel, increase magnetic sheet and upper cover, it is characterized in that: base comprises the direct projection chamber, iron core is fixed in the direct projection chamber of base, solenoid is fixed on iron core, magnet steel is fixed on the base end face and is close to iron core, increase magnetic sheet and the fixing vibrating membrane group that forms of vibration film spot, the vibrating membrane group is fixed on the step of base by the vibrating membrane edge, upper cover is fixedly connected with base outside the vibrating membrane group, form coupler between upper cover and vibrating membrane, base inboard with iron core outside between be provided with a paraphase chamber, be communicated with gap between magnet steel by being located at vibrating membrane between direct projection chamber and paraphase chamber.
2. electromagnetic buzzer according to claim 1, it is characterized in that: described step is terraced steps.
3. electromagnetic buzzer according to claim 1, it is characterized in that: described magnet steel is alnico magnet.
4. electromagnetic buzzer according to claim 2, it is characterized in that: the chamfering of described terraced steps is 45 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100204983A CN103137117A (en) | 2013-01-20 | 2013-01-20 | Electromagnetic signal alarming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100204983A CN103137117A (en) | 2013-01-20 | 2013-01-20 | Electromagnetic signal alarming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103137117A true CN103137117A (en) | 2013-06-05 |
Family
ID=48496865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100204983A Pending CN103137117A (en) | 2013-01-20 | 2013-01-20 | Electromagnetic signal alarming device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103137117A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106098047A (en) * | 2016-08-23 | 2016-11-09 | 蒋寅 | A kind of electromagnetic active buzzer and manufacture method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010009586A1 (en) * | 2000-01-24 | 2001-07-26 | Kazushi Suzuki | Electroacoustic transducer and method of manufacturing the same |
| US20010028722A1 (en) * | 2000-02-29 | 2001-10-11 | Kazushige Tajima | Electroacoustic transducer |
| US20040105564A1 (en) * | 2002-11-26 | 2004-06-03 | Citizen Electronics Co., Ltd. | Electrical acoustic converter |
| CN201662987U (en) * | 2010-02-01 | 2010-12-01 | 汉得利（常州）电子有限公司 | Miniature built-in oscillating source SMD buzzer |
-
2013
- 2013-01-20 CN CN2013100204983A patent/CN103137117A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010009586A1 (en) * | 2000-01-24 | 2001-07-26 | Kazushi Suzuki | Electroacoustic transducer and method of manufacturing the same |
| US20010028722A1 (en) * | 2000-02-29 | 2001-10-11 | Kazushige Tajima | Electroacoustic transducer |
| US20040105564A1 (en) * | 2002-11-26 | 2004-06-03 | Citizen Electronics Co., Ltd. | Electrical acoustic converter |
| CN201662987U (en) * | 2010-02-01 | 2010-12-01 | 汉得利（常州）电子有限公司 | Miniature built-in oscillating source SMD buzzer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106098047A (en) * | 2016-08-23 | 2016-11-09 | 蒋寅 | A kind of electromagnetic active buzzer and manufacture method thereof |
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130605 |