JPS602637Y2 - electronic buzzer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic buzzer, particularly a small electronic buzzer.

Demand for electronic buzzers equipped with a sounding body such as a buzzer or a bell is increasing with the development of office equipment, traffic lights, security devices, etc., and various demands are being made along with this increase in demand.

In other words, while miniaturization is a given, there are some devices that specifically require a smaller height dimension and others that specifically require a smaller installation area, and electronic buzzers are generally fixed to a printed circuit board. However, there are cases in which it is desired to mount a sounding body outside the device so that it can be heard clearly.

In addition, even for small electronic buzzers, the vibration frequency is high because the diameter of the diaphragm is small, and the waveform is relatively shaped because the oscillation circuit is a non-contact drive circuit using an electronic circuit. When incorporated into a device, the sound source will produce sound at a high frequency with less high frequency components, which is susceptible to interference from reflected waves of sound waves and resonance effects. The sound volume to the outside is greatly influenced by the position.

In order to ensure the volume, the sounding body must be placed in an appropriate location within the device through cut-and-try techniques.

Of course, such measures are not necessary if there is sufficient volume, but since the volume of a small electronic buzzer with a small current is low, it is greatly affected by the installation location.

By the way, what has been provided so far is shown in Figure 1 a and b.
As shown in the figure, a sounding unit 1 containing a sounding body on a single printed board 11 and an oscillation circuit 6 are arranged horizontally or vertically and housed in a housing 12. Since it is provided as a completed product housed in the housing 12, its dimensions are not very small, and it is difficult to install the horizontal arrangement shown in Figure 1a in places where the installation floor space is small. There are restrictions on embedding.

Furthermore, it is not possible to mount only the sounding unit to the outside of the device.

Moreover, in order to install an electronic buzzer that satisfies the above-mentioned acoustic conditions, a constraint has to be set in terms of downsizing the device, which tends to lead to an increase in the size of the device. .

On the other hand, it is possible to provide only a single sounding unit and allow the user to design the oscillation circuit appropriately, that is, depending on the application, but the design of the oscillation circuit is not just for producing sound. It takes a lot of consideration to produce the maximum sound and the best tone.

The present invention was devised in view of these points, and its purpose is to reduce the size of each unit by separating the oscillation circuit unit and the sounding unit, thereby reducing the limited space available. This increases the freedom of placement within the space within the device, making it easier to position the sounding body in a location where the volume to the outside becomes louder, making it easier to wire between the two devices that are installed far apart, and freeing up space inside the device. To provide an electronic buzzer in which a sounding body unit and an oscillation circuit unit can be directly connected with the least amount of wiring work when the acoustic conditions are satisfied.

Therefore, the present invention provides an electronic buzzer that includes at least an oscillation circuit and a sounding body that vibrates a diaphragm, paper cone, etc. using the output of the oscillation circuit, and the oscillation circuit and the sounding body are housed in separate cases. The oscillator circuit unit is composed of an oscillation circuit unit and a sounding body unit, and the sounding body unit is provided with a connection pin led out to the outside for connecting the sounding body to the oscillation circuit. The feature is that the pin socket for receiving the connection pin of the unit is provided on the underside with pins for connecting to the power supply and the sounding element brought out to the outside, and by separating the units into both units, flexibility in placement is achieved. At the same time, the connecting pin of the sounding unit and the pin socket and pin of the oscillation circuit unit facilitate the connection between the two units.

The details will be explained below based on the illustrated embodiment.

Figures 2a and 2b show the sounding unit 1,
- A sounding body consisting of a core 14, a yoke 15, a coil 16, and a diaphragm 17 inside a case 3 having a sound output hole 13 on its surface.

2 is installed inside the case 3, and the connecting pin 4 is led out from the case 3.

The oscillation circuit unit 5 has an oscillation circuit 6 assembled on a small printed board 1B as shown in the circuit diagrams of FIGS. 4 to 6 inside a case 7 having a pin insertion hole 8 on the top surface, and is internally installed in a case 7 having a pin insertion hole 8 on the top surface. Pins 10 are led out for connection with the power source 2, connection with the sounding body 2, and selection of a resistor for volume adjustment.

This printed board 18 is provided with a pin socket 9 made of a blade receiving spring located directly below the pin insertion hole 8.

Note that the cross section of the oscillation circuit unit 1 shown in FIG. 8 is based on the circuit in FIG. 5.

In this way, the sounding body 2 and the oscillation circuit 6 are separately connected to the case 3,
7, a sounding body unit 1 and an oscillation circuit unit 5
This electronic buzzer can be integrated into equipment as follows.

FIG. 7 shows a case where the height dimension is limited, and the sounding unit 1 and the oscillation circuit unit 5 are arranged side by side on the same printed board 19, and the electrical connection between the two is placed on the side of the oscillation circuit unit 5. The pin 10 instead of the pin socket 9 is used to connect to the connecting pin 4 of the sounding unit 1 via the printed circuit on the printed board 19.

Figure 8 shows the case where only the sounding unit 1 is installed at the most convenient location for producing sound, and the device 2
The sound generating unit 1 is installed inside the sound output hole 21 of the 0,
The oscillation circuit unit 5 arranged on the printed board 19 has connection plugs 2 with connection pins 4 and pin sockets 9 at both ends, respectively.
The electrical connection is made by a connector 22 with 3.

In this case, even if the oscillation circuit 6 is provided with a resistor for adjusting the volume as shown in FIGS. In addition to requiring at least two connection wires, it is convenient that the sounding unit 1 can be attached to the outside of the device 20.

The case shown in Fig. 9 is a case where the installation floor area is desired to be small, and the equipment has a mounting base that allows the sound from the electronic buzzer to be sufficiently emitted to the outside. The connecting pins 4 of 1 are inserted into the pin sockets 9 through the pin insertion openings 8 of the oscillation circuit units 5 to connect them, and the units are stacked one above the other.

In this way, the sounding body unit and the oscillation circuit unit can be installed at any location and in any connection state depending on the usage of the device and the situation of the installation location.

As mentioned above, in the present invention, by separating the sounding body unit and the oscillation circuit unit, the overall size becomes larger than when both are integrated.
Each miniaturized unit can be installed at an appropriate location within the device, and it can be installed effectively in the limited space of the device, taking into account acoustic conditions. Even though both units are separated in this way, the presence of connection pins makes it easy to connect the two, and the oscillation circuit unit is also equipped with a pin socket, so It is also possible to use a direct connection without the need for wiring between the two units.

[Brief explanation of the drawing]

Figures 1a and b are cross-sectional views of the conventional example, and Figures 2a and b are respectively sectional views of the conventional example.
3 is a sectional view and a perspective view of the sounding unit of the present invention-embodiment, FIG. 3 is a sectional view of the same oscillation circuit unit, and FIG.
5 and 6 are circuit diagrams of the same as above, respectively, and FIGS. 7, 8, and 9 are sectional views showing each side of the assembly to the above equipment. 1 is a sounding body unit, 2 is a sounding body, 3 is a case, 4 is a connection pin, 5 is an oscillation circuit unit, 6 is an oscillation circuit, 7 is a case, 8 is a pin insertion slot, 9 is a pin socket, 10 is a pin show.

Claims (1)

[Scope of utility model registration request] In an electronic buzzer that consists of at least an oscillation circuit and a sounding body that vibrates a diaphragm, paper cone, etc. with the output of this oscillation circuit, the oscillation circuit and the sounding body are housed in separate cases, respectively. The sounding body unit has a connection pin led out to the outside for connecting the sounding body to the oscillation circuit, and the oscillation circuit unit has a pin socket that receives the connection pin of the sounding body unit. An electronic buzzer comprising: on the top surface, and pins for connecting to a power source and a sounding body led out on the bottom surface.