JPS6237273Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to improvements in electric horns used in automobiles and the like.

Normally, this type of electric horn (hereinafter referred to as a horn) has an electromagnetic coil inside a housing, a movable core that vibrates by the electromagnetic coil, and a diaphragm that is connected to the movable core and vibrates. It is equipped with a sounding sounding board that is connected to the sounding board and generates sound by its vibration. However, as shown in Figure 1, in the conventional horn, the diaphragm was installed between the movable core and the metal washer on the side of the sounding plate in direct contact with them, so when the diaphragm vibrates, the movable A large impact force is applied to the diaphragm at the contact portion of the diaphragm with the end face of the core and the metal washer, resulting in fatigue and breakage of the diaphragm in a relatively short period of time. In particular, this type of horn is subject to heavy exposure to water due to splashing from puddles while the vehicle is running due to its mounting position on the vehicle, and under such conditions fatigue is further accelerated.

In addition, some conventional horns had paper waterproof washers inserted on both the front and back sides of the diaphragm, but due to the material, their durability and
It has poor water resistance and is not an effective means for improving the above problems.

The present invention solves the problems of the prior art described above, and therefore, an object of the present invention is to provide an electric horn with excellent durability.

Next, the present invention will be explained with reference to the drawings. As shown in the figure, the horn includes an electromagnetic coil 1,
It includes a movable core 2 that is vibrated by an electromagnetic coil, a fixed core 3 is installed opposite to the movable core 2, and normally closed contacts 4 are located at appropriate positions on the movable core 2. Furthermore, the horn includes a diaphragm 5, which is connected to the movable core 2 at its center and to the housing 1 at its outer periphery.
0 and the outer periphery of the front cover 11. These members are housed within the housing 10. Further, the horn is provided with a sounding sounding plate 7 fixed to the diaphragm 5 with bolts and nuts 8 via metal washers 6. Therefore, the diaphragm 5 is sandwiched between the movable core 2 and the washer 6 at its center. In the conventional horn structure, as shown in FIG. 1, the diaphragm 5 was in direct contact with the movable core 2 and the washer 6, and therefore had the above-mentioned drawbacks.

The horn according to the present invention, as shown in Fig. 2,
A washer 9 made of resin is provided so as to come into direct contact (in close contact) with both sides or at least one side of the center of the diaphragm 5, thereby making it possible to contact both or at least the movable core 2 and the metal washer 6. It also prevents contact with either side.
Preferably, such washers 9 are installed on both sides of the center of the diaphragm 5.

During operation, when the electromagnetic coil 1 is energized, the movable core 2 is attracted to and collides with the fixed core 3, and the sounding sounding plate 7 vibrates due to the impact force and generates sound. During this suction process, the normally closed contacts 4 open and separate, so the movable core 2 is repelled by the elasticity of the diaphragm 5, and in the process, the contacts 4 close, connecting and producing sound.

During operation of the horn, a large impact force is applied to the center of the diaphragm 5 due to the vibration of the diaphragm 5. However, in the horn of the present invention, there is a large impact force between the diaphragm 5 and the movable core 2 and/or between the diaphragm 5 and the metal washer 6. Since the washer 9 made of resin is inserted between the diaphragms 5 and 5, the impact force on the diaphragm 5 during blowing is alleviated, and fatigue characteristics are improved.
In particular, in the case where the outer periphery of the housing 10 and the front cover 11 is fixed by winding and tightening the outer periphery 11a of the front cover 11, and the outer periphery of the diaphragm 5 is held between them, the entire periphery of the diaphragm is fixed. Therefore, the stress applied to the diaphragm 5 at the time of blowing is even greater, so the configuration according to the present invention is particularly desirable for such a structure.

Therefore, according to the present invention, a resin washer is provided in direct contact with at least one surface of the diaphragm included in the electric horn, thereby reducing the impact force applied to the diaphragm when blowing. As a result, durability is significantly improved. Furthermore, by inserting a resin washer, the diaphragm does not come into direct contact with other metal parts, which prevents the coating, plating, etc. applied to the diaphragm from peeling off, and prevents the diaphragm from coming into direct contact with other metal parts. The progression of stress corrosion underneath is prevented. Therefore, peeling off of the coating and progression of stress corrosion are prevented, and the impact force on the diaphragm is alleviated, so durability is greatly improved compared to conventional horns.

[Brief explanation of the drawing]

Figure 1 is a vertical sectional view of a conventional electric horn, Figure 2
The figure is a longitudinal sectional view of one embodiment of the electric horn of the present invention. In the figure, 1...electromagnetic coil, 2...movable core, 5
...Diaphragm, 7...Sound sounding board, 9...Resin washer, 10...Housing, 11...
front lid.

Claims (1)

[Claims for Utility Model Registration] (1) A housing includes an electromagnetic coil, a movable core that vibrates by the electromagnetic coil, and a diaphragm that vibrates while being connected to the movable core, and the diaphragm is provided outside the housing. In an electric horn equipped with a sounding sounding plate connected to a sound-producing sounding plate which generates sound by vibration, a resin washer is provided on at least one surface of the center of the diaphragm in direct contact with the diaphragm, An electric horn characterized in that a washer prevents an impact from the movable core side or the resonance plate side from directly acting on the diaphragm. (2) Utility Model Registration The electric horn according to claim 1, wherein the washer is provided on both sides of the center of the diaphragm. (3) In the electric horn according to claim 1 or 2, the diaphragm has an outer periphery between the outer periphery of the housing and the outer periphery of a front cover fixed thereto. An electric horn, characterized in that the housing and the front cover are clamped together, and the outer periphery of the housing and the front cover are fixed by winding and tightening the front cover.