KR100547306B1 - Structure of car audio chassis to reduce vibration and noise - Google Patents

Abstract

The present invention relates to a structure of a car audio chassis for vibration and noise prevention, and more particularly, to a structure of a car audio chassis for forming a hook and a leaf spring on an upper chassis of a car audio to prevent vibration and noise of the upper chassis. .

To this end, a hook is formed at the front side of the upper chassis, and a leaf spring is formed at the rear side.

Car Audio, Upper Chassis, Hook, Leaf Spring, Rattle Noise

Description

Structure of car audio chassis to reduce vibration and noise}

1 is a perspective view showing a fastening structure of a conventional car audio chassis,

2 is a perspective view showing a fastening structure of a car audio chassis according to the present invention;

3 is an exploded perspective view illustrating a chassis of a car audio according to the present invention;

4 is a perspective view showing the rear surface of the upper chassis according to the present invention;

5 is a perspective view showing the back of the upper chassis according to the present invention;

FIG. 6 is a partial detailed view of part A of FIG. 5;

FIG. 7 is a cross-sectional view of a cross section taken along line C-C of FIG. 2;

FIG. 8 is a partial detailed view of part B of FIG. 5;

FIG. 9 is a cross-sectional view of a cross section taken along line D-D of FIG. 2;

FIG. 10 is a cross-sectional view taken along line E-E of FIG. 2.

<Description of the symbols for the main parts of the drawings>

10: operation panel, 20: main chassis,

25: rear part of main chassis, 27: support part,

30: upper chassis, 31: hook,

32: refraction, 33: support,

34: front flange, 35: leaf spring,

36: incision, 38: rear flange,

40: front chassis, 50: screw

The present invention relates to a structure of a car audio chassis for vibration and noise prevention, and more particularly, to a structure of a car audio chassis for forming a hook and a leaf spring on an upper chassis of a car audio to prevent vibration and noise of the upper chassis. .

In general, the car audio, in particular the head unit of the vehicle is a generic term for cassette decks, radios, CDP, etc. are installed on the dashboard.

Car audio includes radio type, cassette + radio type, CDP + radio type, and CDP + tape + radio type.

In recent years, car audio has been further complicated by the addition of navigation and TV functions.

On the other hand, the size of the head unit is standardized all over the world, but most of the countries in Korea are adopting a method called 1DIN, 2DIN standard of the German Industrial Standard (DIN).

1 is a perspective view showing a fastening structure of a conventional car audio chassis.

As shown in Fig. 1, the conventional car audio chassis is a kind of housing divided into several parts and assembled by screwing or fitting.

That is, the car audio constitutes an exterior with the operation panel 1, the main chassis 2, and the upper chassis 3, and after the fastening of the operation panel 1 and the main chassis 2, the upper chassis (2) is mounted thereon. 3) was covered.

Here, the upper chassis 3 is made of steel and plated steel in a generally flat plate shape, and the front, rear, left and right corner portions are fixed and assembled by screws.

However, in fixing the upper chassis 3 to the operation panel 1 and the main chassis 2, the operation panel 1 and the main chassis 2 due to tolerances of the press die and deformation after processing. Since a gap is generated between the upper chassis 3 and the upper chassis so that the upper chassis is not properly supported, rattle noise is generated due to vibration, and there is a problem that the flow of the upper chassis 3 occurs.

In order to solve this noise problem, conventionally, a screw is additionally fastened to the rear middle portion 4 of the upper chassis 3 (see FIG. 1) or a separate dustproof sound absorbing rubber is used.

However, in the assembling process of the upper chassis 3, additional parts are required, and there is a problem of increasing workmanship and increasing production costs for bonding dustproof rubber or fastening screws, and in addition, dustproof rubber sheets frequently fall off due to heat. There was a problem that occurred a lot.

In addition, conventionally, since the noise of only the rear side of the upper chassis 3 was prevented, noise generated at the front portion of the upper chassis 3 could not be effectively removed.

The present invention has been made to solve the above-described problems, and the vibration and the like to prevent the noise of both the front and rear of the car audio upper chassis without increasing the separate parts or work process, and to prevent the flow of the upper chassis due to vibration and Its purpose is to provide a structure of a car audio chassis for noise prevention.

In order to achieve the above object, the structure of the car audio chassis for vibration and noise prevention of the present invention, the main chassis of the car audio; An upper chassis fastened to an upper portion of the main chassis; A front chassis fastened to the main chassis and the upper chassis; It includes a control panel fastened to the front chassis.

A hook is formed at an edge of the upper chassis, and the hook is formed of a refracted portion refracted downward and a support portion refracted in the horizontal direction again from the refracted portion.

At this time, the support portion is preferably slightly bent in the upward direction.

The hook is formed on the front side of the upper chassis and is fastened to the front chassis. A front flange that is bent downward is further formed on the front side of the upper chassis, and a predetermined gap is formed between the hook and the front flange.

In addition, a portion of the upper chassis is formed by cutting a leaf spring is formed bent downward, the upper chassis is fastened by pressing the leaf spring.

At this time, the leaf spring is located in the middle portion of the rear side of the upper chassis, is formed to protrude downward in the shape of an arc.

A rear flange refracted downward is further formed on the rear side of the upper chassis.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

2 is a perspective view showing a fastening structure of a car audio chassis according to the present invention, Figure 3 is an exploded perspective view showing a chassis of the car audio according to the present invention.

As shown in Figures 2 and 3, the structure of the car audio chassis for vibration and noise prevention of the invention is the main chassis 20 of the car audio, the upper chassis 30 is fastened to the upper portion of the main chassis 20. The front chassis 40 is fastened to the main chassis 20 and the upper chassis 30, and the operation panel 10 is fastened to the front chassis 40.

The main chassis 20 generally serves as an outer housing of the rectangular parallelepiped and protects internal electronic circuits and components while maintaining the appearance of the car audio. Generally, the rectangular parallelepiped is made of steel.

The front chassis 40 is disposed between the main chassis 20 and the operation panel 10.

4 is a perspective view showing the rear surface of the upper chassis 30 according to the present invention, Figure 5 is a perspective view showing the rear surface of the upper chassis 30 according to the present invention.

As shown in FIGS. 3 to 5, holes are formed in front, rear, left, and right corners of the upper chassis 30, and are fastened to the holes by using a screw 50.

Hook 31 is formed at the corner of the upper chassis 30, the hook 31 is preferably formed in the front side of the upper chassis 30, that is, the portion in contact with the front chassis 40.

The hook 31 is engaged with the front chassis 40 to act as a spring for preventing vibration and noise, and also serves to prevent the flow of the upper chassis 30.

FIG. 6 is a partial detailed view of part A of FIG. 5, and FIG. 7 is a cross-sectional view of the cross-sectional view taken along line C-C of FIG. 2.

As shown in FIG. 6 and FIG. 7, the hook 31 has a refractive portion 32 and the refractive portion refracted downward in order to secure the upper chassis 30 to the front chassis 40. At 32, the support part 33 is refracted in the horizontal direction.

The refracting portion 32 acts as a spring having an elastic force with respect to the horizontal force applied to the upper chassis 30, while the upper chassis 30 is no longer flowing in the horizontal direction by being caught by the front chassis 40. It prevents you from doing it.

In addition, the support portion 33 serves as a spring having an elastic force with respect to the vertical force applied to the upper chassis 30, while the upper chassis 30 is no longer caught in the front chassis 40 in the vertical direction It prevents flow.

At this time, in order for the upper chassis 30 to be in close contact with the front chassis 40 strongly, the support 33 is preferably bent slightly upward in the horizontal direction, that is, the plate direction of the upper chassis 30.

For example, if the thickness of the upper chassis 30 and the front chassis 40 is 1mm, the length of the refracting portion 32 is 1mm equal to the thickness of the front chassis 40, and the front chassis The length of the support part 33 protruding in the 40 direction is 4 mm, and the support part 33 is bent about 0.3 mm in the upward direction, and thus the thickness between the front chassis 40 and the support part 33. Is preferably 0.7 mm.

In addition, a front flange 34 having a shape of a 'b' which is refracted downward is further formed at a front side of the upper chassis 30, that is, in a direction contacting the front chassis 40.

This causes the upper chassis 30 to be deformed by a force applied to the upper chassis 30 when the support part 33 of the hook 31 is slightly curved upward. This is to prevent it.

In addition, it is preferable to form a predetermined gap between the hook 31 and the front flange 34, which is fastened to the upper chassis 30 when the upper chassis 30 is fastened to the front chassis 40. In order to transmit the deformation of the upper chassis 30 due to the applied force to only the hook 31, and to further strengthen the elastic force generated by the hook 31, the upper chassis 30 is the front chassis ( 40 is firmly fastened to prevent the flow of the upper chassis 30.

The hook 31 is preferably formed of a total of three each one in the front center and the end of the upper chassis (30).

Thus, by forming the hook 31 on the front side of the upper chassis 30, the rattle noise generated in the front side of the upper chassis 30 by vibration can be effectively prevented.

FIG. 8 is a partial detailed view of part B of FIG. 5, and FIG. 9 is a cross-sectional view illustrating the cross section taken along the line DD of FIG. 2, and FIG. 10 is a cross-sectional view taken along the line EE of FIG. 2. It is a cross section.

As shown in FIGS. 8 to 10, in order to prevent rattle noise occurring at the rear side of the upper chassis 30, an incision 36 is formed at the rear middle portion of the upper chassis 30. The cutout 36 is formed with a leaf spring 35 bent down by press working or the like.

At this time, the leaf spring 35 is preferably formed to protrude in an arc shape.

As shown in FIG. 10, the upper chassis 30 is fastened by pressing the leaf spring 35, which is supported by a support part 27 formed at the rear portion 25 of the main chassis.

In FIG. 10, the dotted line indicates the state before the upper chassis 30 is pressed, the solid line shows the state after the upper chassis 30 is pressed, and the arrow indicates the force.

The leaf spring 35 is made of the same material as a part of the upper chassis 30, and may be produced without a separate part or an additional process by press working.

The inventors produced a prototype and confirmed through experiments that rattle noise does not occur even when an external force is applied to the upper chassis 30.

In addition, it is preferable that a rear flange 38 having a shape of a 'b' is further formed on the rear side of the upper chassis 30.

This is the same reason as the front flange 34, that is, even if a thin steel plate is used for the upper chassis 30 is reinforced by the rear flange 38 to deform the upper chassis 30 by the leaf spring 35 This is to prevent.

Looking at the method of fastening the upper chassis 30 to the front chassis 40 fastened to the main chassis 20, the hook 31 formed on the front side of the upper chassis 30 to the front chassis 40 After inserting into the formed slit or flange, the leaf spring 35 formed on the rear side of the upper chassis 30 is supported by the support portion 27 formed on the rear portion 25 of the main chassis to apply a force.

After that, it is fastened to the main chassis 20 by using the screw 50 in the holes formed at the front, rear, left and right corners of the upper chassis 30.

By doing so, the front side of the upper chassis 30 has elastic force by the hook 31 and the rear side by the leaf spring 35, respectively, and the rattle noise generated by the external force or vibration applied to the upper chassis 30 is absorbed. The upper chassis 30 may be prevented from being flown by the hook 31.

The structure of the car audio chassis for the vibration and noise prevention of the present invention is not limited to the above-described embodiment, and may be variously modified and implemented within the range permitted by the technical idea of the present invention.

According to the structure of the car audio chassis for vibration and noise prevention of the present invention as described above has the following effects.

First, by forming a hook spring at the rear of the upper chassis, respectively, the hook is a spring role, thereby effectively preventing the rattle noise generated by vibration and external force.

Second, by forming the hook with the bent portion and the support portion having a bend, it is possible to more effectively prevent the rattle noise generated in the upper chassis by the horizontal force and the vertical force, and also has the effect of preventing the up, down, left and right flow.

Third, by bending the support portion in the upward direction, the upper chassis is strongly adhered to the front chassis, thereby further preventing the upper chassis from flowing.

Fourth, by forming the front flange refracted downward in the front of the upper chassis, because the support portion of the hook is bent upward, the upper chassis is deformed by the force applied to the upper chassis when the front chassis is fastened. There is an effect that can be prevented.

In addition, by forming a rear flange on the rear side of the upper chassis, the upper chassis is reinforced to prevent deformation of the upper chassis by the leaf spring, there is an effect that a thin steel sheet can also be used.

Fifth, by forming a predetermined gap between the hook and the front flange, the deformation of the upper chassis due to the force applied to the upper chassis can be transmitted only to the hook, and further strengthens the elastic force generated by the hook The upper chassis is firmly fastened with the front chassis to prevent the flow of the upper chassis.                     

Sixth, by forming a leaf spring in the upper chassis, it is possible to prevent the rattle noise of the upper body of the car audio without increasing the number of separate parts or work processes, while the cost is low and the assembly is easy as a portion of the upper chassis is formed of a leaf spring There is an easy working effect.

Claims (10)

Car audio main chassis; An upper chassis fastened to an upper portion of the main chassis; A front chassis fastened to the main chassis and the upper chassis; Including the operation panel is fastened to the front chassis, The upper chassis has a hook, The hook is a structure of a car audio chassis for vibration and noise prevention, characterized in that consisting of a refracted portion refracted in the downward direction, and a support portion refracted in the horizontal direction again in the refraction portion. The method of claim 1, The hook structure of the car audio chassis for vibration and noise prevention, characterized in that formed on the corner of the upper chassis. The method of claim 2, The structure of the car audio chassis for vibration and noise prevention, characterized in that the support portion is bent in an upward direction. The method of claim 3, wherein The hook is formed on the front side of the upper chassis structure of the car audio chassis for vibration and noise prevention, characterized in that coupled with the front chassis. The method according to any one of claims 1 to 4, The front of the upper chassis structure of the car audio chassis for vibration and noise prevention, characterized in that the front flange further refracted in the downward direction formed. The method of claim 5, A structure of a car audio chassis for vibration and noise prevention, characterized in that a gap is formed between the hook and the front flange. The method according to any one of claims 1 to 4, The upper chassis is formed with a leaf spring formed by cutting a portion is bent downward, the upper chassis is the structure of the car audio chassis for vibration and noise prevention, characterized in that the leaf spring is pressed and fastened. The method of claim 7, wherein The leaf spring is located in the middle portion of the rear side of the upper chassis, the structure of the car audio chassis for vibration and noise prevention, characterized in that formed to protrude downward in an arc shape. The method of claim 8, The rear portion of the main chassis structure of the car audio chassis for vibration and noise prevention, characterized in that the support portion for supporting the leaf spring is formed. The method of claim 9, The rear side of the upper chassis structure of the car audio chassis for vibration and noise prevention, characterized in that the rear flange is further refracted downward formed.

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