JP2003173666A - Shock absorber of disk regenerator for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shock absorber of disk regenerator for vehicle which facilitates the assembling of a disk generator for vehicle, is low-cost and enables the miniaturization. <P>SOLUTION: An inner chassis 5 attaching a turn table 6 and a pickup 7 is suspended by two tension coil springs 17 and the weight of the inner chassis 5 is supported on the neutral position in an outer chassis 1 by the tension coil spring and a damper 16. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shock absorber for a vehicle-mounted disc player in which an inner chassis having a turntable and a pickup mounted thereon is movably supported on an outer chassis by a tension coil spring and a rubber material.

[0002]

2. Description of the Related Art A vehicle-mounted disc reproducing apparatus is provided with a shock absorber for movably supporting an inner chassis having a turntable and a pickup mounted therein in an outer chassis. This shock absorber prevents the vibration of the vehicle applied to the outer chassis from being transmitted to the inner chassis, thereby preventing skipping of the reproduced disc. For this reason, the shock absorber supports the inner chassis so that it can freely move around a gap of about 3 mm from the neutral position in the outer chassis in the vertical and horizontal directions. This shock absorber consists of a tension coil spring that lifts the inner chassis against the outer chassis, a tension coil spring that pulls down the inner chassis against the outer chassis against the lifting spring force, and a tension coil spring that supports the tension coil spring at a neutral position. It is configured with a rubber damper that damps the free vibration of the inner chassis.

The above-mentioned springs for suspension are hung over both ends of one diagonal line of the inner chassis between the outer chassis and the inner chassis, and the springs for pulling down the other spring of the inner chassis between the outer chassis and the inner chassis. It is hung on both ends of the diagonal line.
Then, the inner chassis is held in the neutral position in the outer chassis by the tension of these four springs. On the other hand, the rubber damper is a rubber bag filled with highly viscous oil,
A braking shaft protruding from the inner chassis is fitted inside from the one surface side of the bag. The other side of the bag is fixed to the outer chassis.

The spring pulled down by the above-mentioned shock absorber is troublesome to install because the space between the inner bottom surface of the outer chassis and the lower surface of the inner chassis is narrow. Also, the rubber damper itself is not elastic, and the shape of the rubber damper is not clearly defined, so it was troublesome to mount the braking shaft. Moreover, this rubber damper is expensive because it is filled with oil that does not freeze. Therefore, as disclosed in Japanese Patent Application Laid-Open No. 8-212770, an anti-vibration member using a relatively hard rubber material has been proposed as an inexpensive and easy means for connecting the outer chassis and the inner chassis. The vibration isolating member has a cylindrical neck portion provided between the mounting portion of the chassis and the outer circumference of the annular vibration isolating body to facilitate bending of the vibration isolating member in the tracking direction and the focus direction.

[0005]

[Problems to be Solved by the Invention] However, JP-A-8-
When the anti-vibration member disclosed in Japanese Patent No. 212770 is used in a vehicle-mounted disc reproducing apparatus, the anti-vibration member is already elastically deformed by the weight of the inner chassis when the inner chassis is supported.
Therefore, when the inner chassis is bounced up toward the ceiling of the outer chassis due to the vibration of the outer chassis,
An elastic force that pulls back the inner chassis is applied after the amount of elastically deformed deformation reaches zero. As a result, the anti-vibration member applies braking after the inner chassis has moved by a length such that the amount of deformation in which the inner chassis has elastically deformed returns to zero.
This is inconvenient for arranging the inner shear freely in a narrow gap of about 3 mm as in a vehicle-mounted disc reproducing apparatus. An object of the present invention is to provide a shock absorber for a vehicle-mounted disc player, which can be easily assembled and can be downsized.

[0006]

SUMMARY OF THE INVENTION In a shock absorber for a vehicle-mounted disc player according to the present invention, a tension coil spring is laid between each end of a diagonal line of the inner chassis and the outer chassis, and the inner chassis is attached to the outer chassis. I hung it up. Then, the gravity of the inner chassis is supported by the tension coil spring and the rubber material against the outer chassis. The tension coil springs can be hooked from the upper surface side of both chassis, so that the spring hooking work becomes easy. Moreover, since the inner chassis is lifted by the tension coil spring, the rubber material has a very small amount of deformation.

Further, the rubber material supports the inner chassis at three points on the inner bottom surface of the outer chassis, and the center of the turntable is arranged in a triangle connecting the three rubber materials, so that the disk is made horizontal when the disk is reproduced. It becomes easier to keep.

Further, if the mounting holes are provided at both ends of the rubber material and the tongue pieces press-fitted into the mounting holes are formed in the inner chassis and the outer chassis, the mounting of the rubber material becomes easy.

Then, when the direction in which the pair of tension coil springs are bridged is made substantially coincident with the moving direction of the pickup and the tension of the tension coil springs is directed in the horizontal direction,
The movement of the inner chassis in the tracking direction can be suppressed by the spring force of the tension coil spring and the elastic force of the rubber material, and sound skipping can be effectively controlled.

When the outer chassis is a main body having an opening through which the inner chassis can be inserted and removed, and a cover member for covering the opening so that the inner chassis can be assembled into the outer chassis through the opening, the inner chassis can be connected to the outer chassis. Easy to install.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION A shock absorber for a vehicle-mounted disc player according to the present invention will be described with reference to FIGS. FIG. 1 is an external view of a vehicle-mounted disc player, in which an outer chassis 1 is composed of a steel plate body 1a bent into a box shape and a cover 2 for closing an opening above the body 1a. A disc insertion opening 3 is formed in the. As shown in FIG. 2, the main body 1a includes a bottom plate 1b (inner bottom surface) and side plates 1 that are bent left and right.
It consists of c and 1d. On the bottom plate 1b, three first tongue pieces 1e are formed at positions separated by a predetermined distance with their longitudinal directions oriented in the same direction. Each tongue piece 1e is formed in a direction substantially orthogonal to the diagonal line of the main body 1a. Then, a projection is formed at the tip of each of the first tongue pieces 1e to prevent the object inserted into the tongue piece 1e from coming off easily.
Further, on the tip side of each first tongue piece 1e, a finger insertion hole 1f having a size into which a fingertip can be easily inserted is formed in the bottom plate 1b. Further, spring mounting holes 1g and 1h are formed at the front and rear ends of the left and right side plates 1c and 1d.

The inner chassis 5 has a substantially rectangular shape, as shown in FIG.
A turntable 6 is arranged at the center as shown in FIG. 3, and an optical pickup 7 for reproducing a disc is attached from the turntable 6 on one diagonal line of the inner chassis 5 so as to be movable back and forth. Further, the inner chassis 5 is formed with three second tongue pieces 5a extending in the same direction as the first tongue pieces 1e. The second tongue piece 5a is provided with the first tongue piece 1a when the XYZ axis lines of the inner chassis are aligned with the outer chassis XYZ axis lines.
It is formed at a position overlapping with e. Then, the center of the turntable 6 is located in a triangle connecting the three second tongue pieces 5a. The inner chassis 5 has a pickup 7
Small holes for spring hooking on both ends of the same diagonal as the moving direction of
5b and 5c are opened.

Further, on the upper surface side of the inner chassis 5, a push-in lever 8 for conveying the disc to the reproducing position and a push-back lever 9 for pushing out the disc at the reproducing position from the reproducing device.
, A clamper support plate 11 that supports the clamper 10, and first and second guides 12 and 13 that guide the disc.
A control plate 14 for rotating the clamper support plate 11 to move the clamper 10 toward and away from the turntable 6 is attached to one side surface of the inner chassis 5.

The size of the inner chassis 5 is such that when a 12 cm disk is placed on a turntable, the four side surfaces of the inner chassis 5 slightly project from the outer circumference of the disk. On the other hand, the inner surface of the outer chassis 1 (the side plate 1 of the main body 1a
The widths of c and 1d) are set so that the intervals facing the side surface of the inner chassis 5 have a gap of 3 mm each.
Further, the inner surface of the outer chassis 1 has a height of 3 mm between the ceiling of the outer chassis 1 (the inner surface 2a of the cover 2) and the clamper support plate 11 when the disc is reproduced, as shown in FIG. Turntable motor 1 that can be mounted on the inner chassis 5
The distance between the end surface 15a of 5 and the bottom plate 1b is set to have a size of 3 mm.

A damper 16 (rubber material) is arranged between the first tongue piece 1e and the second tongue piece 5a. The damper 16 is made of a rubber material such as butyl rubber, silicon rubber, polyurethane rubber, and natural rubber, and has a hardness of about 45 degrees and has elasticity by itself. As shown in FIG. 3, the shape of the damper 16 is such that a first mounting hole 16b fitted to the first tongue 1e and a second mounting hole fitted to the second tongue 5a are formed on the outer periphery of the annular body 16a. 16c and 180c apart from each other, and a Y-shaped rib 16d is integrally formed with the annular body inside the annular body 16a. A cavity 16e is formed between the ribs.

The elastic force of this damper is 16
The movements of b and 16c toward and away from the space bend with a weak force, and when the first and second mounting holes 16b and 16c move horizontally with a space between them, they bend with a strong force. The thickness and shape of the outer circumference are set. The distance between the first mounting hole 16b and the second mounting hole 16c of the damper 16 is such that when the damper 16 is mounted on the first and second tongues 1e and 5a, the damper 16
In order not to bend, the distance between the inner surface 2a of the cover 2 and the clamper support plate 11 and the distance between the end surface 15a of the motor 15 and the bottom plate 1b are set to have a length of 3 mm.

The suspension spring 17 (tensile coil spring) for suspending the inner chassis 5 from the outer chassis 1 is a tension coil spring having ring hooks 17a formed at both ends.
This suspension spring 17 uses a ring hook 17a for the side plate of the main body 1a.
Spring hook holes 1g and 1h opened in 1c and 1d and inner chassis 5
When fitted in the small holes 5b, 5c of the above, the coil portion is stretched, and the inner chassis 5 is hung with respect to the main body 1a by its elasticity. When the force of the suspension spring 17 that suspends the inner chassis 4 is adjusted to match the weight of the inner chassis 5, the inner chassis 5
The amount of deformation of the damper 16 that supports the can be reduced to zero.

A procedure for assembling the inner chassis 5 into the outer chassis 1 will be described with reference to FIGS. 4 to 6. First, the inner chassis 5
Push-in lever 8, push-back lever 9, clamper support plate 1
1. Install the first and second guides 12, 13, the turntable 6 and the control plate 14. At this time, the second mounting hole 16 of the damper 16
The c is fitted into the second tongue piece 5a, and the damper 16 is attached to the inner chassis 5. Then, the inner chassis 5 is inserted into the main body from the opening side of the main body 1a. Then, the first mounting hole 16b of the damper 16 pops out from the finger insertion hole 1f of the bottom plate 1b. Then, a fingertip is inserted into the finger insertion hole 1f to fit the first attachment hole 16b into the first tongue piece 1e. (The state of FIG. 4) At this time, the inner chassis 5 is temporarily fixed to the main body 1a by the elasticity of the damper 16.

At this time, the damper 16 is crushed in the direction in which the first and second mounting holes 16b and 16c approach each other in order to support the gravity of the inner chassis. After this, the ring hook a of the suspension spring 17 is hooked on the spring hooking holes 1g and 1h of the main body 1a and the small holes 5b and 5c of the inner chassis 5 while stretching the coil portion.
The inner chassis 5 is suspended from the main body 1a by the elasticity of the suspension spring 17. Then, the cover 2 is attached and the assembling of the inner chassis 5 into the outer chassis 1 is completed. At this time, the inner chassis 5 has a gap of 3 mm between both side surfaces of the inner chassis 5 and the inner surfaces of the side plates 1c and 1d, the inner surface 2a of the cover 2 and the clamper support plate 11, and the motor 15 of the motor 15. The space between the end face 15a and the bottom plate 1b is also supported by the suspension spring 17 and the damper 16 in a neutral position with a gap of 3 mm.

According to the embodiment of the present invention, the shock absorber of the vehicle-mounted disc player is constructed by the suspension spring 17 and the inner chassis 5.
Is suspended from the outer chassis 1, and the damper 16 supports the inner chassis 5 at a neutral position in the outer chassis 1.
The number of hanging springs 17 need only be two, which are hung around the corners of the inner chassis 5 and the outer chassis 1. Further, the spring hooks can be hooked from the upper surface side of both chassis, which makes the work easier. Moreover, since the inner chassis 5 is hoisted by the suspension spring 17, the damper 16 has a small deformation amount when the inner chassis 5 is supported. As a result, even if the inner chassis 5 is flipped up inside the outer chassis 1, the damper 16 is immediately stretched, and braking that immediately pulls back the movement of the inner chassis 5 is applied.

It is known that the sound skipping phenomenon of the optical pickup is apt to occur when the inner chassis 5 collides with the outer chassis 1. Therefore, it is understood that the collision between the inner chassis 5 and the outer chassis 1 can be prevented in order to prevent the sound skipping. In the shock absorber for a vehicle-mounted disc player according to the present invention, when the inner chassis 5 moves from the neutral position, the damper 16 is immediately stretched and brakes the movement of the inner chassis 5, so that the inner chassis 5 and the outer chassis 1 are separated from each other. Collisions can be effectively prevented.

Further, if the center of the turntable 6 is arranged inside the triangle connecting the three dampers 16, the turntable 6 can easily keep the disc horizontal when reproducing the disc. Further, at this time, the distance between the clamper support plate 11 and the ceiling 2a of the outer chassis 1 becomes uniform, so that a gap between the inner chassis 5 and the outer chassis 1 is secured, and the collision between the both can be effectively prevented. Further, mounting holes 16b and 16c are provided in the damper 16, and tongues 5a and 1e formed on the inner chassis 5 and the outer chassis 1 are provided.
Need only be fitted into these mounting holes 16b and 16c.
Connection between the inner chassis 5 and the main body 1a becomes easy.

The movement resistance of the inner chassis 5 in the tracking direction can be reduced by matching the direction in which the suspension spring 17 is bridged with the movement direction of the pickup 7.
The elastic force of the damper 16 is added to the force of 1 to increase, and it becomes difficult for the inner chassis 5 and the outer chassis 1 to collide. Since the sound skip of the disk reproducing apparatus is caused by the objective lens flying in the tracking direction due to the impact, the sound skip can be prevented by preventing the collision between the inner chassis 5 and the outer chassis 1 in the tracking direction.

[0024]

According to the shock absorbing device for a vehicle-mounted disc player of the present invention, the inner chassis having the turntable and the pickup mounted thereon is hung from the upper surface of the outer chassis by the tension coil spring, and the inner chassis is extended by the tension coil spring and the damper. And supported in a neutral position inside the outer chassis. Since it is only necessary to suspend the inner chassis from the upper surface side of the outer chassis with a tension coil spring, assembly became easy. Moreover, since the damper supports the weight of the inner chassis together with the tension coil spring, it is possible to effectively prevent the collision between the inner chassis and the outer chassis. Even if the inner chassis is flipped up inside the outer chassis, the damper immediately pulls back the movement of the inner chassis, so that the vehicle-mounted disc player can be downsized.

[Brief description of drawings]

FIG. 1 is a perspective view showing the external appearance of a vehicle-mounted disc player according to the present invention.

FIG. 2 is an exploded perspective view of a vehicle-mounted disc player according to the present invention.

FIG. 3 is a front view of an elastic member.

FIG. 4 is a schematic side view showing a state in which an inner chassis is supported below the outer chassis by a rubber material.

FIG. 5 is a schematic side view showing a state where the inner chassis is hung on the outer chassis by a tension coil spring.

FIG. 6 is a schematic side view showing a reproduction state of a disc.

[Explanation of symbols]

1 Outer chassis 1a body 1e First tongue 2 Cover member 5 Internal chassis 5a Second tongue 6 turntable 7 pickup 16 damper (rubber material) 16c, 16d mounting holes 17 Suspension spring (tensile coil spring)

Claims (5)

[Claims] 1. An inner chassis (5) having a turntable (6) and a pickup (7) attached thereto is movably arranged in the outer chassis (1) through a tension coil spring (17) and a rubber material (16). In the in-vehicle disc reproducing device, the tension coil spring is hung between at least one diagonal end of the substantially rectangular inner chassis and the outer chassis to suspend the inner chassis from the outer chassis. A cushioning device for an in-vehicle disc player, wherein the rubber material is interposed between a lower surface of an inner chassis and an inner bottom surface of an outer chassis. 2. The rubber material supports the inner chassis at three positions on the inner bottom surface of the outer chassis, and the center of the turntable is arranged in a triangle connecting the three rubber materials. Shock absorber for in-vehicle disc player 3. A mounting hole (16) is provided at each end of the rubber material.
c, 16d), and the inner chassis and the outer chassis are formed with tongue pieces (5a, 1e) press-fitted into the respective mounting holes. . 4. The pair of tension coil springs are arranged at respective end portions of a diagonal line which substantially coincides with the moving direction of the pickup so that both of them are attracted in the horizontal direction. Shock absorber for in-vehicle disc player. 5. The outer chassis comprises a main body (1a) having an opening through which the inner chassis can be put in and taken out, and a cover member (2) covering the opening.
A shock absorber for a vehicle-mounted disc player.