Mechanical Buzzer
Foshan cosson Technology Co. Ltd is a professional enterprise engaged in manufacturing buzzer,sensor, piezeceramic, speaker and so on . The company is located in Guandong. Since its inception the company spirit of "Quality first, customer first" business philosophy, full participation, excellence, to provide high-quality products for customers !
Cosson has talent, technology, quality, service, strategy and other advantages.Meanwhile,it is optimizing work flow, casting excellence, continuing to revitalize the brand to maintain the leading position, the vision of a more broad, higher goals and dedicated to creating more value for customers. The company has developed a series of products which are widely used in the production: communication, household appliances, automobiles, electric bicycles, UPS power supply, alarm; instrumentation, electronic toy and electronic clocks and so on.
Why choose us?
01
Quality assurance
Quality is our culture, we believe that the quality is the soul of an enterprise.
02
Good service
Good after-sale service, handling the customer complaint and solve problem for customers.
03
Reasonable price
Our products are complete in variety, good in quality, reasonable in price.
04
Fast delivery
We may promise that we can try our best to finish all of your orders within the shortest time.
What is Mechanical Buzzer
Mechanical buzzers generally consist of a vibrating shell and a plastic diaphragm (The plastic diaphragm is installed and fixed on the casing), coil, iron core bracket, magnet, percussion spring piece (the magnet is fixed on the reed with glue), oscillation circuit board. When the mechanical buzzer is powered on, the oscillation circuit passes through the coil, and the iron core bracket attracts the percussion reed to strike the plastic diaphragm on the housing to produce sound.
Benefits of Mechanical Buzzer
Simplicity
Mechanical buzzers are relatively simple devices, consisting of only a few components. This simplicity makes them easy to understand, install, and maintain.
Cost-effective
Compared to other types of audible signaling devices, mechanical buzzers are often more affordable, making them a cost-effective solution for many applications.
Reliability
Mechanical buzzers are known for their reliability. They have a long lifespan and can withstand various environmental conditions, such as temperature fluctuations and vibrations.
Loud sound output
Mechanical buzzers are capable of producing loud and attention-grabbing sound output, which makes them suitable for applications where a strong audible signal is required.
Instant activation
Mechanical buzzers can be instantly activated, providing immediate feedback or alerts to users. This quick response time can be crucial in situations where timely notifications are essential.
Industrial equipment
Mechanical buzzers are commonly found in industrial equipment and machinery to indicate various conditions or events. For example, they can be used to signal the completion of a process, indicate a fault or error, or warn of unsafe conditions.
Consumer electronics
Mechanical buzzers are often used in consumer electronics devices such as timers, watches, and electronic games to provide audible alerts. They can be used to signal the end of a cooking cycle, notify the user of an incoming call or message, or provide feedback during gameplay.
Automotive applications
Mechanical buzzers can be found in automotive applications, such as in car alarms or reverse parking sensors. They provide an audible warning to alert the driver or others of potential hazards.
Doorbells and entry systems
Mechanical buzzers are commonly used in doorbells and entry systems to notify occupants of someone's presence at the door. The buzzing sound serves as an indication that someone is seeking entry.
Medical devices
Mechanical buzzers find application in medical devices, such as patient monitoring systems or medical alarms. They are used to alert healthcare professionals or patients of critical events or abnormal conditions.
Public address systems
Mechanical buzzers can be integrated into public address systems to attract attention or signal important announcements in public spaces, such as airports, train stations, or large venues.
Communication devices
Mechanical buzzers can be used in communication devices, such as two-way radios or intercom systems, to provide audible alerts for incoming calls or messages.
Home appliances
Mechanical buzzers can be found in various home appliances, including washing machines, dryers, and dishwashers. They signal the end of a cycle or indicate an error or malfunction.
Educational and training equipment
Mechanical buzzers are often used in educational and training equipment, such as quiz games or training simulators, to provide feedback or signal correct/incorrect answers.
Alarms and security systems
Mechanical buzzers are frequently used in alarms and security systems to provide a loud and attention-grabbing sound in case of emergencies or unauthorized access. They can be integrated into burglar alarms, fire alarms, and intrusion detection systems.
What is the Pronunciation Principle of Mechanical Buzzer
After the power is turned on (as small as 1.2VDC/1.5VDC/3.0VDC, up to 110VAC/220VAC), the audio signal current generated by the oscillator passes through the electromagnetic coil, causing the electromagnetic coil to generate a magnetic field. Under the interaction of the electromagnetic coil and the magnet, the diaphragm on the outer casing is periodically bridged to emit sound.
The mechanical buzzer is mainly suitable for electric products (boiled eggs, soya-bean milk makers, etc.) to make the warning sounding of electronic products; it is also used for the main components on the repeller. Because it not only emits a frequency of 0.5 kHz but also the entire buzzer is vibrating and can be transmitted to the mouse through the ground to achieve the repeller effect.
Nowadays, mechanical buzzers are generally active. The active mechanical buzzer contains an audio oscillating circuit. When connected to a DC power supply, it can make a “da da da---” sound with a noticeable vibration.
Components of Mechanical Buzzer
Mechanical buzzers are typically powered by direct current (DC) sources such as batteries or power supplies. The voltage and current requirements vary depending on the specific buzzer model and application.
The electromagnet is the core component of a mechanical buzzer. It consists of a coil of wire wound around a ferromagnetic core. When current flows through the coil, it creates a magnetic field that interacts with the diaphragm.
The diaphragm is a thin, flexible membrane made of materials like metal or plastic. It is attached to the electromagnet and vibrates in response to the magnetic field. The diaphragm's size, shape, and material influence the frequency and volume of the sound produced.
The contact mechanism is responsible for controlling the flow of current through the electromagnet. It typically consists of a spring-loaded contact that opens and closes when the diaphragm vibrates. This action interrupts the current flow, causing the diaphragm to vibrate and produce sound.
How to Maintain Mechanical Buzzer
1.Regular inspection
Conduct regular inspections of the mechanical buzzer to check for any signs of damage, loose connections, or wear and tear. Look for any loose screws or mounting hardware and tighten them if necessary.
2.Cleaning
Keep the mechanical buzzer clean from dust, dirt, or other debris that may affect its performance. Use a soft brush or compressed air to remove any accumulated particles. Avoid using liquids or solvents that may damage the components.
3.Lubrication
Some mechanical buzzers may require lubrication for smooth operation. Refer to the manufacturer's instructions to determine if lubrication is necessary and use a suitable lubricant. Too much or too little lubrication can affect the buzzer's performance, so follow the guidelines carefully.
4.Replacement of worn-out parts
Over time, certain components of the mechanical buzzer may wear out or become damaged. It is important to replace these parts promptly to maintain the buzzer's functionality. Refer to the manufacturer's instructions or consult a professional if you are unsure about replacing specific components.
5.Power supply
Ensure that the power supply to the mechanical buzzer is stable and within the specified voltage and current limits. Fluctuating or excessive power can damage the buzzer or affect its performance. Regularly check the power supply and address any issues promptly.
6.Environment
Consider the operating environment of the mechanical buzzer and take necessary precautions. For example, if the buzzer is exposed to high levels of moisture or extreme temperatures, it may require additional protection or sealing to prevent damage. Follow the manufacturer's recommendations for environmental conditions.
7.Testing
Periodically test the mechanical buzzer to ensure it is functioning properly. This can be done by activating the buzzer manually or through an automated system. Check if the sound output is consistent and meets the desired requirements. If any issues are detected, troubleshoot or seek assistance to rectify them.
8.Documentation
Maintain proper documentation of any maintenance or upkeep activities performed on the mechanical buzzer. This can include records of inspections, repairs, and replacements. Having this documentation can help in tracking the history of the buzzer and identifying any recurring issues.
Mechanical Buzzer Control Circuit
Because the operation current of the buzzer is generally high, the input/output port of the single-chip microcomputer cannot be directly driven (but the AVR can drive a small electric buzzer), so the amplifier circuit must be used for driving, and generally a triode is used to amplify the current. The market drive circuit generally includes the following parts:
Buzzer
When DC voltage (for an active buzzer) or square wave (passive buzzer) is applied to both ends of the sound element, its main parameters are shape dimensions, sound direction, working voltage, working frequency, working current, motion mode, etc., which can be chosen according to the need.
01
Freewheeling diode
The buzzer is an inductive element and its current cannot be changed temporarily. Therefore, a freewheeling diode should be used for constant current. Otherwise, an alternating voltage of ten volts is applied to both ends of the warning buzzer, which may damage the triode and interfere with other parts of the circuit.
02
Filter capacitor
The function of the filter capacitor is to filter the influence of the buzzer current on other components and improve the AC impedance of the power supply. If possible, it is better to parallel a 220uF electrolytic capacitor.
03
Triode
A high base level causes the triode to saturate and produce a buzzer sound. While the low base level causes the triode to close and stop the buzzer sound.
04
Working voltage
The working voltage of the electromagnetic buzzer can be 1.5–24 V, and the working voltage range of the piezoelectric buzzer can be 3–220 V. However, under normal conditions, it is recommended that the working voltage range of the piezoelectric buzzer be more than 9V to produce a louder sound.
Current consumption
According to different voltages, the electromagnetic buzzer can consume a current of tens to hundreds of milliamperes, while the piezoelectric buzzer needs a few milliamperes for normal operation.
How to control
Choose active or inactive buzzers according to specific needs.
Size
Buzzer size affects volume and frequency. The size of the electromagnetic buzzer is generally 7 to 25 mm, and the piezoelectric buzzer is 12-50 mm.
Sound pressure
A distance of 10 cm is used as a standard test for buzzers. If the distance is doubled, the attenuation will be about 6 dB. Conversely, if the distance is shortened, it will exceed 6 dB. The electromagnetic buzzer can reach a level of 85dB / 10 cm, while the piezoelectric buzzer can make a louder sound. Most common alarms are made from piezoelectric sensors.
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We attach great importance to, cherish all cooperation or cooperative partner of customers, to express the trust and expectations of our customers.Cosson's team of professional skills, has a very enthusiastic, with a lofty ideals and high aspirations enthusiasm and look forward to customers, together with the Chinese The electronic industry is booming as a modest, attained brilliant. Partnership, abide by integrity, common development!We firmly believe that the goods of electronic will continue to forge ahead, and you work together to create a better future! We hope to work with all of our overseas partners.Let's do it even better!
