JPH0670746B2 - Spiral horn and method of manufacturing the same - Google Patents

Description

TECHNICAL FIELD The present invention relates to a spiral horn mounted on a vehicle such as an automobile and a method for manufacturing the same.

[Problems to be Solved by Prior Art and Invention] Generally, this kind of spiral horn vibrates a diaphragm provided in a horn body, and a sound generated by this vibration is generated in a resonator forming a spiral sound path. It is configured to be articulated and emitted as an alarming sound to the outside.

As a conventional spiral horn, as shown in FIG. 3, there is known one in which a cover is interposed between a diaphragm and a resonator frame having an open bottom of the sound passage to close the bottom of the sound passage. However, as a procedure to assemble this,
In some cases, a cover is attached to the horn body to form an air vibration chamber, and then a resonator frame is attached to the outer surface of the cover. However, with this product, it is difficult to form a high-quality resonator that does not impair the volume and sound quality by bonding the outer inclined surface of the cover and the bottom surface of the resonator frame in an airtight manner. Whether or not the check work is to use the completed spiral horn, and when it is found that there is poor adhesion here, it will be a defective product including the horn body side, so the yield is poor, There is a problem in that it leads to cost up due to poor productivity.

On the other hand, a resonator is formed in advance by air-tightly adhering and fixing a base to a bottom surface of a resonator frame having an open bottom surface of the sound path so as to block the sound path. A procedure for attaching to the main body is also conceivable. However, since the base itself that closes the sound path forms an air vibration chamber with the horn body side in this case, precise sound quality adjustment work including adjustment of the gear A can be performed before mounting the resonator. This cannot be done before the air vibration chamber is formed, and must be done after mounting the resonator. However, in this way, the resonator side end of the armature at the center of the diaphragm is blocked by the resonator frame, so the gearup sensor cannot be arranged at the resonator side end, resulting in sound quality adjustment. There is a problem that the work and its check work are extremely troublesome and complicated.

[Means for Solving the Problems] The present invention has been devised with the object of providing a spiral horn capable of eliminating these drawbacks in view of the above circumstances and a method of manufacturing the spiral horn. As a spiral horn, a resonator that forms a spiral sound path is provided in a horn body that includes a diaphragm provided so as to close an opening of a case and a cover that faces an outer surface of the diaphragm and forms an air vibration chamber. In a spiral horn integrally mounted, the resonator is integrally fixed to a resonator frame formed so that a sound path bottom surface is opened, and the sound path is hermetically sealed to the resonator frame bottom surface. Sound input port that is formed on the base of the resonator by
In air-tightly communicating with the sound output opening formed in the cover, a fitting portion that fits with the outer peripheral edge of the horn body is formed on the outer peripheral edge of the base, while the peripheral edge portion of the sound output opening formed in the cover is formed. And the peripheral portion of the sound input opening formed in the base are communicated in an airtight manner.

In addition, as a method of manufacturing a spiral horn, a spiral sound path is provided in a horn body that includes a diaphragm provided so as to close the case opening and a cover that faces the outer surface of the diaphragm and forms an air vibration chamber. In a spiral horn manufactured by integrally mounting resonators to be formed,
A cover is integrally fixed to the outer peripheral surface of the diaphragm to form a horn body, while a base is airtightly integrally fixed to the bottom surface of a resonator frame having an open bottom of the sound path to form a resonator. When assembling the horn body and the resonator, the sound inlet on the resonator side provided on the base and the sound outlet on the horn body provided on the cover are hermetically sealed with an adhesive. In order to make a communication connection to the sound input port on the base side, after applying adhesive to the sound input port peripheral part on the base side, the fitting part formed on the outer peripheral edge of the base is fitted to the outer peripheral edge of the horn body to It is characterized in that an adhesive press is made between the cover and the sound output port peripheral portion on the cover side.

The present invention is able to provide a spiral horn of extremely high quality due to these configurations.

[Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings. In the drawing, reference numeral 1 denotes a horn body of a spiral horn for a vehicle. The horn body 1 has a vibration generator 3a for vibrating a diaphragm 3 using an electromagnet in a case 2, but the opening of the case 2 is closed. The peripheral edge of the diaphragm 3 thus provided is sandwiched between the peripheral edge of the case 2 and the peripheral edge 4a of the cover 4 provided so as to face the outer surface of the diaphragm 3. That is, the peripheral edge portion 4a of the cover 4 is bent into a crimped shape so as to sandwich the diaphragm 3 and the case 2, but a sound output port 4b is opened in the central portion of the cover 4, and further the peripheral edge of the sound output port 4b. The part is an edged part protruding outward
Formed in 4c.

On the other hand, 5 is a resonator forming a spiral sound path, and the resonator 5 includes a resonator frame 6 having a sound path wall 6a forming a sound path whose bottom surface is open, and the resonator frame 6 Is formed by a base 7 fixed to the bottom surface of the resonator frame 6 so as to hermetically close the sound path of the resonator frame 6. The resonator frame 6 and the base 7 are formed of the same resin material and It is fixed integrally by sonic welding.

A sound inlet 7a is provided in the center of the base 7 for receiving the sound generated by the diaphragm 3. A step portion 7b is formed at the bottom edge of the sound inlet 7a. An annular pool groove 7c for storing an adhesive is formed on the outer peripheral side of the portion 7b.

Further, a fitting portion 7d that projects downward in a tubular shape is formed on the outer peripheral edge of the base 7. The fitting portion 7d is fitted onto the peripheral edge portion 4a of the cover 4, and the projection 7e formed on the inner peripheral surface is engaged with the peripheral edge portion 4a in a retaining manner. Thus, the resonator 5 can be fitted and assembled to the horn body 1.

Next, a method of manufacturing the spiral horn formed by the horn body 1 and the resonator 5 will be described. First, the horn body 1
Then, the resonator 5 is formed by ultrasonic welding, and at this stage, the quality check and fine adjustment of the horn body 1 alone and the quality check of the resonator 5 alone are individually performed. Then, the horn body 1 and the resonator 5 which have no problem in quality are assembled, but this assembly involves dropping the adhesive in an annular manner in the reservoir groove 7c on the resonator 5 side, and fitting it to the fitting portion 7d of the resonator 5. On the other hand, it can be easily carried out only by fitting the cover peripheral portion 4a on the horn body 1 side. Then, in the state where the adhesive is pressed by the fitting, the protrusion of the cover 4 in contact with the step portion 7b is restricted by the edging portion 4c of the cover 4. The narrow gap (about 1 mm) between the base 4 and the base 7 is penetrated by the capillary phenomenon to surely bond the cover 4 and the base 7.

In the embodiment of the present invention configured as described above, the spiral horn includes a horn body 1 having a cover 4 and a base 7.
It is manufactured by individually forming a resonator 5 having a sound path covered in an airtight manner and assembling them. Therefore, it is possible to check the quality of the horn body 1 and the resonator 5 before assembling each, and as a result, it is possible to manufacture a spiral horn of extremely high quality.

Moreover, since the resonator 5 is formed by ultrasonically welding the resonator frame 6 and the base 7 shaped with the same resin material,
It is possible to form a sound path that is excellent in airtightness and has no adhesive sticking out, so that it is possible to improve sound quality and durability.

Further, since the fitting portion 7d for fitting and holding the peripheral edge of the horn body 1 is formed on the peripheral edge of the base 7 of the resonator 5, the horn body 1
And the resonator 5, the cover 4 and the sound output port 4b peripheral portion and the base 7
It is possible to assemble by only adhering to the peripheral edge of the sound input port 7a and simplify the manufacturing process.Although the adhering part will receive the adhesive pressing action due to the above fitting, reliable adhesion It can be performed.

Further, in the adhesive portion, the edging portion 4c of the cover 4 contacts the stepped portion 7b of the base 7 to regulate the protrusion of the adhesive into the sound path, so that the deterioration of the sound quality due to the protrusion of the adhesive is prevented. can do.

Furthermore, the edge portion 4c forms a narrow gap (about 1 mm) between the cover 4 and the base 7 due to the contact with the stepped portion 7b of the base 7, and thus the adhesive agent is formed by the capillary phenomenon. It is possible to promote the permeation of the adhesive, and to perform reliable bonding without variations.

Furthermore, since the recessed groove 7c is formed in the peripheral portion of the sound input port 7a of the base 7 so that the adhesive can be easily applied, it may be possible to simplify the manufacturing process. Can also be possible.

[Advantages] In summary, since the present invention is configured as described above, the spiral horn includes a horn body having a cover and a resonator having a sound path covered in a base in an airtight manner. It is possible to manufacture by individually forming and assembling them, and as a result, it is possible to check the quality of the horn body and the resonator before assembling, and to manufacture a spiral horn of extremely high quality. In this case, when a fitting portion that fits the outer peripheral edge of the horn body is formed on the outer peripheral edge of the base, the horn main body and the resonator are connected to the sound output opening peripheral portion of the cover. Since it can be assembled only by adhering to the sound inlet opening peripheral part of the base, the manufacturing process can be greatly simplified. Good adhesion I can.

Also, in the case where the adhesive accumulating groove is formed in the peripheral portion of the sound inlet of the base, it may be possible to simplify the manufacturing process by facilitating the application of the adhesive, or the automatic application of the adhesive is also possible. It can be possible.

Furthermore, in the case where the edge portion of the cover that contacts the peripheral portion of the sound inlet of the base is formed to control the protrusion of the adhesive, deterioration of sound quality due to the protrusion of the adhesive is prevented. be able to. Further, since the edging portion can form a narrow gap between the cover and the base by abutting with the base, the capillary phenomenon promotes the penetration of the adhesive agent to ensure reliable adhesion without variation. be able to.

[Brief description of drawings]

The drawings show an embodiment of a spiral horn and a method of manufacturing the same according to the present invention. FIG. 1 is a sectional view of the spiral horn, FIG. 2 is an enlarged sectional view of an adhesive portion, and FIG. FIG. 4 is a cross-sectional view of a conventional spiral horn. In the figure, 1 is a horn body, 2 is a case, 3 is a diaphragm, 4 is a cover, 5 is a resonator, 6 is a resonator frame, and 7 is a resonator frame.
Is the base.

Claims (4)

[Claims] 1. A resonator that forms a spiral sound path is integrated into a horn body that includes a diaphragm provided so as to close an opening of a case and a cover that faces an outer surface of the diaphragm and forms an air vibration chamber. In a spirally mounted horn, the resonator is integrally fixed to a resonator frame formed so that the sound path bottom surface is open, and the sound path is hermetically sealed to the resonator frame bottom surface. Formed with the base, the sound inlet opening in the base of the resonator is airtightly communicated with the sound outlet opening in the cover, and is fitted to the outer peripheral edge of the base and the outer peripheral edge of the horn body. A spiral horn characterized in that the peripheral portion of the sound output opening formed in the cover and the peripheral portion of the sound input opening formed in the base are made to communicate with each other in an airtight manner while forming a fitting portion. 2. In the first claim, the peripheral portion of the sound output opening formed in the cover and the peripheral portion of the sound input opening formed in the base are made to communicate with each other in an airtight manner by adhesion. At the same time, a spiral horn characterized in that a reservoir groove for accumulating the adhesive is formed in the peripheral portion of the sound inlet of the base. 3. In the first aspect, the peripheral edge of the sound output opening formed in the cover and the peripheral edge of the sound input opening formed in the base are connected in an airtight manner by adhesion. At the same time, the spiral horn is characterized in that a rim portion is formed on the periphery of the sound outlet of the cover so as to contact the peripheral portion of the sound inlet of the base to regulate the protrusion of the adhesive. 4. A resonator that forms a spiral sound path is integrated into a horn body that includes a diaphragm that is provided so as to close an opening of the case and a cover that faces the outer surface of the diaphragm and forms an air vibration chamber. In a spiral horn manufactured by attaching the cover integrally to the outer peripheral surface of the diaphragm to form a horn body,
The base is opened in the base when the base is airtightly integrally fixed to the bottom of the resonator frame with the bottom of the sound path to form a resonator, and the horn body and the resonator thus formed are assembled. After connecting the sound inlet on the resonator side and the sound outlet on the horn body opened in the cover in an airtight manner via an adhesive, after applying adhesive to the peripheral edge of the sound inlet on the base side. The spiral type characterized in that the fitting portion formed on the outer peripheral edge of the base is fitted to the outer peripheral edge of the horn body to bond and hold the peripheral edge of the base-side sound inlet and the peripheral edge of the cover-side sound outlet. Method of manufacturing horn.