JPH0114078Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a buzzer having a diaphragm, and particularly to a buzzer suitable for use in a motorcycle.

BACKGROUND ART Buzzers that generate a predetermined sound are widely used in various vehicles, not just motorcycles, for the purpose of preventing engine abnormalities, forgetting to turn off lamps, and the like.

A conventional example of such a buzzer will be explained with reference to FIGS. 1 to 3.

In Figures 1 to 3, a housing 1 that forms the outer shell of the buzzer has a cylindrical shape with both ends closed, and inside is a diaphragm 2 that can vibrate at an audible frequency and a print that makes the diaphragm 2 vibrate. Foundation 3
An electric circuit 4 formed on the top is disposed. A vibration sound extraction hole 1a is provided at the center of the upper end of the housing 1 in the figure.
The diaphragm 2 is supported by the cylindrical portion 1b so as to face the cylindrical portion 1b, thereby forming a resonance chamber 1c. The vibration sound derivation hole 1a guides the vibration sound emitted by the diaphragm 2 to the outside. Incidentally, a lead wire 5 for connecting the electric circuit 4 and an external circuit is led to the outside through a hole provided at an appropriate location in the housing 1.

When the conventional buzzer configured as described above is used while being exposed to the outside, it prevents rainwater, etc. from entering the resonance chamber 1c through the vibration sound extraction hole 1a, and allows it to easily flow out when it enters. Therefore, the vibration sound extraction hole 1a is installed so as to always face downward.

However, if a motorcycle buzzer is installed so that the vibration sound output hole always faces downward, there is a problem in that it is difficult for the driver to hear the buzzer sound while driving.

Therefore, the purpose of the present invention is to solve the above-mentioned problems and provide a buzzer that allows the driver to easily hear the buzzer sound while driving, and furthermore prevents rainwater etc. from accumulating in the resonance chamber. That's true.

In the buzzer according to the present invention, the cylindrical part provided in the housing and forming a resonance chamber together with the diaphragm has a vibration sound extraction hole provided in the cylindrical part facing the vibration surface of the diaphragm within the periphery of the cylindrical part. The cylindrical portion is characterized in that an inner circumferential wall surface in contact with a wall surface is inclined so as to approach the center of the vibration surface of the diaphragm in a direction toward the diaphragm.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 4 and 5.

The buzzer of the embodiment shown in FIGS. 4 and 5 has the following features except that four vibration sound extraction holes 1a are formed so as to be inscribed in the inner peripheral wall surface of the cylindrical portion 1b. It has the same configuration as the example. Note that the number of vibration sound deriving holes 1a is not limited to four, but may be at least one. The cylindrical portion 1b has a shape that decreases in diameter toward the diaphragm 2. That is, in this example, a part of the housing (i.e., a cylindrical part 1
The inner peripheral wall surface of b) is inclined so as to approach the center of the diaphragm 2 in the direction toward the diaphragm 2.

When the buzzer according to the embodiment of the present invention as described above is installed in a vehicle such as a motorcycle, it is necessary to place one of the vibration sound extraction holes 1a at the lowest position and to make sure that the vibration plate 2 is connected to the vibration sound extraction hole. It should be located above 1a. In this way, even if rainwater enters the resonance chamber 1c through the vibration sound extraction hole 1a, for example, it will be transmitted through the cylindrical part 1b to the vibration sound extraction hole 1.
Since the water droplets flow out through a, water does not accumulate in the resonance chamber 1c. That is, when attaching the buzzer according to the present invention to a vehicle, it is not necessary to direct the vibration sound extraction holes 1a directly downward, but to place one of the vibration sound extraction holes 1a at the lowest position and the lowest surface of the inner wall of the cylindrical portion 1b to be horizontal. The front of the housing can be turned upward until the

As is clear from the above, in the buzzer according to the present invention, a vibration sound deriving hole is provided in the cylindrical part provided in the housing and forming a resonance chamber together with the diaphragm, facing the vibration surface of the diaphragm. is in contact with the circumferential inner wall surface of the cylindrical portion.

Therefore, when installing the buzzer in a vehicle, if it is tilted so that the vibration sound extraction hole is at the lowest position and the diaphragm is positioned above the vibration sound extraction hole, rainwater can flow into the resonance chamber. Since it is difficult for rainwater to enter the resonant chamber, and any rainwater that does enter flows out from the vibration sound extraction hole through the circumferential inner wall surface of the cylindrical portion, water does not accumulate in the resonance chamber. In addition, since the inner circumferential wall surface of the cylindrical part is inclined toward the center of the diaphragm in the direction toward the diaphragm, rainwater that has entered the resonance chamber smoothly flows out to the outside and remains inside the resonance chamber. There is no.

In addition, in such a configuration, it is not necessary to direct the vibration sound extraction hole directly downward, and it is possible to install the housing with the front surface of the housing provided with the vibration sound extraction hole 1a facing horizontally or slightly upward, and is particularly suitable for motorcycles, etc. This is preferable because the vibration sound is easily transmitted to the driver.

Further, in this configuration, the direction of attachment is not limited, and the degree of freedom in selecting the attachment direction is increased.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing a conventional example of a buzzer, Figs. 2 and 3 are perspective views of the buzzer of Fig. 1, and Figs. 4 and 5 are longitudinal sections of a buzzer as an embodiment of the present invention. FIG. 2 is a diagram and a perspective view. Explanation of symbols of main parts, 1...Housing, 1
a... Vibration sound extraction hole, 1b... Cylindrical part, 1c...
...resonance chamber, 2...diaphragm.

Claims (1)

[Scope of utility model registration request] The housing includes a diaphragm and a cylindrical part that forms a resonance chamber together with the diaphragm, and at least one housing is provided in the cylindrical part at a position facing the vibration surface of the diaphragm and communicates between the resonance chamber and the outside. A buzzer having two vibration sound extraction holes, wherein the vibration sound extraction hole is in contact with an inner circumferential wall surface of the cylindrical portion, and the vibration sound of the diaphragm is A buzzer characterized by being sloped toward the center of the surface.