JPH08307980A - Rear cover device of speaker grille - Google Patents

Abstract

PURPOSE: To provide a rear cover device in a speaker grille with superior seal property and attachment operability. CONSTITUTION: In the rear cover device of the speaker grille where a short cylinder part 3 surrounding a grille part 2 is provided at the rear side of the grille part 2 so as to block the opening of the short cylinder part 3 by a rear cover 5 when a speaker mainbody is not incorporated, a boss 4 for fixing the rear cover is projectingly arranged at the center of the rear surface of the grille part 2 and the rear cover 5 is fixed so as to permit the internal surface of the cover 5 to be adhesively sealed to the opening edge of the short cylinder part 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a back cover device for a speaker grill which is excellent in workability of mounting.

[0002]

2. Description of the Related Art Since a car stereo is usually installed in a vehicle, it is common to provide a speaker grill portion for the car stereo in an interior trim for a vehicle such as a door trim or a ceiling trim. However, when the speaker body is not incorporated, it is necessary to close the grill part with the back cover so that dust does not enter the inside of the vehicle through the grill part and light leakage does not occur. As a back cover device of the speaker grill for such a purpose, for example, as shown in FIG. 3, a short cylinder portion 11 is provided on the back side peripheral edge of the grill portion 10 and an opening thereof is provided with a plurality of locking legs 12. It is known that the back cover 13 is positioned by the plurality of bosses 15 protruding from the trim substrate 14 on the outer side of the short tubular portion 11 and then fixed and closed with screws 16.

However, in such a back cover device, it is necessary to provide the locking legs 12 on the back cover 13, which has a complicated shape and is inferior in productivity, and it is necessary to provide a certain strength. There is a problem that the lid 13 is usually made of an iron plate, which causes a weight increase. Further, the work of attaching the back lid 13 requires positioning and is screwed at a plurality of places, so that workability is poor. There was a point. Further, the trim substrate 14 is provided outside the short tubular portion 11.
In order to prevent the problem that the boss 15 is protrudingly provided in a large space and the installation position of the grill part 10 is restricted, and the sealing property is insufficient and complete intrusion of dust, light and sound leakage. There was also a problem that I could not do it.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, has a simple shape and can be made of any material, and is excellent in productivity. It is extremely easy to install and remove, because it does not require positioning, and since it is not necessary to project an extra boss, etc., the installation location is narrow and any location can be selected. The present invention has been completed for the purpose of providing a back cover device for a speaker grill, which is excellent in that it can completely prevent invasion of dust, light, and sound leakage.

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, a speaker grill back cover device according to the present invention is provided with a short tube portion surrounding the grill portion on the back side of the grill portion to incorporate the speaker body. In a back cover device in a speaker grill in which the opening of the short tube portion is closed by the back cover when the cover is closed, a boss for fixing the back cover is provided at the center of the back surface of the grill part, and the back cover is attached to the boss. The inner surface is fixed so as to be closely sealed to the opening edge of the short tubular portion.

[0006]

The above-mentioned structure is similar to the conventional back cover device of this type in that the back cover closes the grill portion when the speaker body is not assembled, but the back cover is provided in the short tubular portion. The inner surface of the boss for fixing the back cover is fixed so as to be closely sealed to the opening edge of the short tubular part, so it has excellent sealing performance and prevents dust from entering and light and sound leakage. Not only the prevention is completely prevented, but also the attaching work and the removing work need only be fixed to or removed from a small number of bosses, so that excellent workability is exhibited.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings. The drawing shows a case where it is applied to a grill portion for a car stereo in a door trim of an automobile, in which 1 is a substrate such as a door trim made of synthetic resin, 2 is a grill portion formed at a predetermined position of the substrate 1, Reference numeral 3 denotes a short tubular portion integrally formed with the substrate 1 on the back side of the grill portion 2 so as to surround the grill portion 2, and the above configuration is basically the same as the conventional one.

A boss 4 for fixing the back cover, which is shorter than the height of the short tubular portion 3, is provided at the center of the grill portion 2, and the inner surface of the peripheral edge portion of the boss 4 has a short tubular portion. The central portion of the back cover 5 which is brought into contact with the opening edge of the back cover 3 is fixed, and the back cover 5 becomes a gentle spherical state warped toward the grill portion 2 side, and the back cover 5 that is going to return to a flat plate shape from this state. The inner surface of the back cover 5 is closely sealed to the inner opening edge of the short tube portion 3 by the elastic force of the lid itself. Although only one boss 4 is provided substantially at the center of the speaker grill portion 2 in the embodiment, the number may be two or three in the central portion. Unlike the conventional iron plate, the back cover 5 is made of elastic and thin synthetic resin, and its shape corresponds to the shape of the grill portion 2 and the outer diameter is the outer diameter of the grill portion 2. It is a little larger than the above and can completely cover the grill portion 2, and a hole portion 5a for engagement is formed in a portion corresponding to the boss 4 in the center portion thereof as needed.

With such a structure, when the speaker main body is not installed in the automobile, the grill portion 2 is closed by the back cover 5 so that dust may enter the inside of the automobile through the grill portion 2 or light leakage may occur. However, in the present invention, the back cover 5 is attached to the boss 4 for fixing the back cover, which is provided in the short tubular portion 3, in the present invention.
Since the inner surface of the peripheral edge portion of the is fixed so as to be closely sealed to the opening edge of the short tubular portion 3, it has excellent sealing properties and can completely prevent dust intrusion, light and sound leakage. . Also, since the back cover 5 can be attached and detached with simple steps such as attaching and detaching the screws 6 to and from the small number of bosses 4 in the center, it is extremely easy and the boss 4 is located inside the grill portion 2. Since it does not get in the way, it is advantageous in design. Moreover, since the back cover 5 can be made of thin synthetic resin, it is possible to reduce the weight and the production cost.

In particular, as shown in the embodiment, if the length of the fixing boss 4 is shorter than the height of the short tube portion 3, the back cover 5 is always in a spherical state in which it is warped toward the grill portion 2 side. Since the inner surface of the peripheral portion of the back lid 5 is fixed and is in close contact with the inner opening edge of the short tubular portion 3, the elastic force of the back lid 5 to restore to a flat plate shape makes the sealing more reliable, and thus the sealing effect is obtained. This is preferable because it is more excellent and there is an advantage that the tip of the boss 4 does not protrude beyond the short tube portion 3 and it does not hinder the assembly of the speaker body.

In the embodiment, the back cover 5 and the boss 4 are connected by caulking, but other means such as screwing, screwing, O-ringing may be used. , If the O-ring is to be used, make the length of the boss 4 slightly longer than the height of the short tube portion 3
Of course, the ring stop position may be set to a position where the inner surface of the back cover 5 is closely sealed to the opening edge of the short tubular portion 3.

[0012]

As is apparent from the above description, according to the present invention, the back cover has a simple shape and the material can be arbitrarily selected, which is excellent in productivity, and the back cover can be attached and removed. It is extremely easy because it does not require positioning, and since there is no need to project extra bosses, etc., the installation location is narrow and any location can be selected. It has various advantages such as complete prevention of noise leakage and the like. Therefore, the present invention is extremely large in that it contributes to the development of the industry as a mounting structure of the back cover in the speaker grill part that eliminates the conventional problems.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is a sectional view showing an embodiment of the present invention.

FIG. 3 is a perspective view showing a conventional example.

[Explanation of symbols]

 2 Grill part 3 Short tube part 4 Boss 5 Back cover

Claims (2)

[Claims] 1. A short cylinder part (3) surrounding the grill part (2) is provided on the back side of the grill part (2) to open the opening of the short cylinder part (3) when the speaker body is not assembled. In the case of the back cover device in the speaker grill that is closed by (5), a boss (4) for fixing the back cover is provided at the center of the back surface of the grill part (2), and the back cover (5) is attached to the inner surface of the boss (4). Is a rear cover device for a speaker grill, which is fixed so as to be closely sealed to the opening edge of the short tube portion (3). 2. The fixing boss (4) according to claim 1, wherein the fixing boss (4) has a length shorter than that of the short tube portion (3) and the back cover (5) is fixed in a state of being warped toward the grill portion (2) side. Speaker grill back cover device.