JP2003172388A - Shock absorbing member for on-vehicle disk reproducing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shock absorbing member for an on-vehicle disk reproducing device intervening between an outer chassis 11 and a floating chassis 12 capable of damping vibration without having a large allowance for damping in particular along the horizontal direction in reduced assembly man-hours at a low cost. <P>SOLUTION: An inside of a horizontally long cylinder 27 is divided into three or four spaces 29 by a thin wall 28 so as to form a main body part 25. The main body part is symmetrical at the right and the left when a provisional surface along the vertical direction containing a central axis of the long cylinder is a reference. At least one of the spaces is divided into two on the provisional surface. Connection parts 26a and 26b connecting to the floating chassis and the outer chassis respectively are provided on upper and lower surfaces of the main body part. A cross section shape crossing the central axis of the long cylinder at right angles is uniform over a whole area along the central axis direction. <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 an improvement of a cushioning member for a vehicle-mounted disc reproducing apparatus.

[0002]

2. Description of the Related Art Generally, a disk reproducing apparatus absorbs vibrations through a buffer member such as a damper between a floating chassis having an optical pickup and an outer chassis so that the optical pickup is not directly affected by external vibrations. I am trying to do it. Particularly, in a vehicle-mounted disc reproducing apparatus, such a cushioning member is important as a measure against external vibration.

Japanese Patent Application Laid-Open No. 8-212770 discloses the following vibration damping member. As shown in FIG. 1, a vibration damping member made of a butyl rubber integrally molded product is described.
The anti-vibration member includes an annular anti-vibration main body 1 whose axis is oriented in the horizontal direction, a mechanical deck mounting portion 2 on the upper side of the anti-vibration member, and a lower panel mounting portion 3 on the lower side. . Further, the vibration-isolating main body 1 and each of the mounting portions 2 and 3 have a narrow columnar circular neck portion 4 which is formed into a constricted shape over the entire circumference.
It is configured to be connected via a and 4b. Therefore, it has a very large degree of freedom of deformation both in the focus direction (vertical direction) and in the tracking direction (horizontal direction), and this large deformation provides an excellent vibration damping function. However, in the case of a disc mounted on a vehicle-mounted disc reproducing device, the space for accommodating the reproducing device is severely restricted, so that a large margin for vibration isolation cannot be secured. In particular, there was a problem that a large margin for vibration isolation could not be taken in the horizontal direction.

Therefore, it is common to use a viscous fluid-filled damper for vibration isolation in an on-vehicle disc reproducing apparatus. As shown in FIG. 2, the viscous fluid-sealed damper is composed of a rubber-like elastic body 5, a tubular portion 6 and a bottom portion 7. The shaft 9 is inserted into the viscous fluid 8 filled in the container, Since the vibration from the outside is damped by viscous flow resistance generated by the movement of the stirring unit 10,
There is no need to make a large allowance for vibration isolation.

[0005]

However, in such a viscous fluid-sealed damper, the viscous fluid must be filled in the container, and the damper itself is expensive. Further, there is a problem in that a shaft for stirring viscous fluid has to be used, the number of parts is increased, and the number of assembling steps is also increased. The present invention has been made to solve such a problem, and an object of the present invention is to provide a cushioning member for an in-vehicle disc reproducing apparatus that is low in cost and has a small number of assembling steps.

[0006]

A cushioning member for an on-vehicle disc reproducing apparatus according to the present invention has a horizontally elongated oblong cylinder divided into three or four spaces by thin walls to form a main body, and a central axis of the oblong cylinder. A left-right symmetry with respect to a vertical vacant surface in the vertical direction, and at least one of the spaces is bisected by the vacant surface, and the upper and lower surfaces of the main body are connected to the floating chassis and the outer chassis, respectively. The portion is provided, and the cross-sectional shape orthogonal to the central axis of the oblong cylinder is made uniform over the entire area in the central axis direction.

With such a construction, the cushioning member can flexibly deform in the vertical direction while largely deforming, and attenuate the vibration in the horizontal direction while suppressing the flexibility and deforming significantly. it can. Therefore, even when mounted on a vehicle-mounted disc reproducing apparatus, it is possible to damp vibrations without taking a large margin for horizontal vibration isolation, which is a particular problem.

If the thin walls are arranged in a substantially Y-shape, H-shape, X-shape or V-shape, the flexibility in the horizontal direction can be suppressed more effectively than in the vertical direction. When each connecting portion is formed by forming a mounting hole penetrating in the direction of the central axis of the elongated cylinder in a protruding portion protruding from the upper and lower surfaces of the main body portion, mounting to the chassis is easy and the number of steps can be reduced. Furthermore, if the cushioning member is integrally formed of a rubber material,
It can be manufactured at a lower cost by using an inexpensive material.

[0009]

3 to 6 show a first embodiment of the present invention, and FIG. 3 is a schematic perspective view in which a part of a vehicle-mounted disc reproducing apparatus is omitted. As shown in FIG. 3, the outer chassis 11 is formed in a box shape by bending four sides of a rectangular metal plate upward. Inside the outer chassis 11, a floating chassis 12 has a plurality of cushioning members 1.
It is supported by 3 in a floating state. The floating chassis 12 has a push lever 16 that pushes the disc 15 inserted from the disc insertion port 14 to the playback position and a push lever 17 that pushes the disc 15 from the playback position toward the insertion port 14 respectively. Installed on.

A turntable 18 is arranged substantially in the center of the floating chassis 12, and a clamper 19 is arranged above it. A clamper support 20 is attached to the floating chassis 12 so as to be rotatable up and down, and a clamper 19 is rotatably supported by a pivot end of the clamper support 20. The clamper support 20 is constantly urged toward the turntable 18 by a spring (not shown). A slide member 21 is arranged on the right side surface of the floating chassis 12 so as to move forward and backward in the disc transport direction by the rotation of the pushing lever 17. A disc guide member 22 is arranged on the left side edge of the floating chassis 12, and a groove 23 parallel to the disc transport direction is formed in the guide member 22. The groove 23 regulates the vertical movement of the disc 15 when the disc is transported. The floating chassis 12 is provided above the disc guide member 22.
Member 24 for properly fixing the outer chassis 11 to the outer chassis 11
Are arranged.

As shown in the perspective view of FIG. 4, the buffer member 13 is formed by projecting the connecting portions 26a and 26b above and below the main body portion 25. When viewed from the front of FIG. 4, the main body portion 25 has a shape in which a horizontally elongated oblong cylinder 27 is partitioned into three spaces 29 by thin walls 28 having a substantially Y shape. The connecting portions 26a and 26b are attached to the projecting portions 30a and 30b projecting from the upper and lower surfaces of the main body 25 in the mounting hole 31 that penetrates in the central axis direction of the elongated cylinder 27 of FIG.
It is formed by providing a and 31b. The cushioning member 13 is
The depth dimension of FIG. 4 is about 6 mm, and the thin wall 28 has a thickness of about 1 mm and is integrally formed of butyl rubber.

Then, as shown in FIGS. 5 (a) and 5 (b), the three cushioning members 13 thus formed are connected to the outer chassis 11.
Is inserted between the inner bottom surface and the lower surface of the floating chassis 12. Then, as shown in FIG. 4, in the floating chassis 12 and the outer chassis 11, the mounting holes 31 of the connecting portions 26a and 26b are provided at the portions corresponding to the respective cushioning members 13.
Mounting pieces 32 and 33 which are press-fitted into a and 31b are formed, respectively. As shown in FIG. 6, each of the mounting pieces 32 and 33 has a retaining portion 34 at the tip end portion thereof, and is hard to come out from the mounting holes 31a and 31b.

FIG. 5A is a plan view of the vehicle-mounted disc reproducing apparatus, and FIG. 5B is a front view of the same. As shown in FIG. 5A, the turntable 18 is arranged substantially at the center of the floating chassis 12. The pushing lever 17 is arranged on the right side of the turntable 18, and a motor 35 and a transmission gear train 36, which are shown by phantom lines, are arranged behind it. A part of the gear train 36 is the pickup unit 3
It is meshed with the rack 7 and transmits the driving force of the motor 35 to the pickup unit 37 to move it appropriately. The pickup unit 37 has a turntable 18 when viewed from the disc insertion opening 14 located at the lower end of FIG.
It is placed in the left back part of the
The turntable 18 is separated from and contacted at an angle of °.

As shown in FIG. 5A, the three cushioning members 13 are provided on the front right side of the turntable 18 and one on the left side of the turntable 18, and the floating chassis 12 is provided.
One is arranged at the center of the innermost part of the
3 is the pickup unit 37 in the left-right direction of FIG.
It is arranged according to the moving direction of.

Each of the cushioning members 13 has three spaces 29 formed by a thin wall 28 having a substantially Y-shape inside an oblong cylinder 27 having a horizontally long oval shape.
Since the thin wall 28 does not significantly affect the flexibility of the long cylinder 27 with respect to a vertical load, the thin wall 28 does not have the flexibility of the long cylinder 27 with respect to a horizontal load. Exerts the effect of suppressing. Therefore, the three buffer members 1
3 exhibits a vibration-proof effect against horizontal vibration between the floating chassis 12 and the outer chassis 11 without causing a large deformation.

Next, a second embodiment of the present invention will be described. As shown in the front view of FIG. 7, the cushioning member 40 is formed by projecting the connecting portions 26a and 26b above and below the main body portion 41. The main body 41 is partitioned into four spaces 44 by an H-shaped thin wall 43 in which a horizontally elongated oblong cylinder 42 is oriented substantially horizontally. The connecting portion 26
Shape of a and 26b and cushioning member 40 and each chassis 1
The method of connecting with 1 and 12 is the same as that of the first embodiment, and thus the description thereof is omitted. The cushioning member 40 has a depth dimension of about 6 mm in FIG. 7, and the thin wall 43 has a thickness of about 1 mm.
It is integrally formed of butyl rubber as mm.

In FIG. 7, the thin wall 43 is illustrated as having a substantially horizontal H-shape, but the present invention is not limited to this, and the same effect can be obtained even if the thin wall 43 has a vertical H-shape. Similar to the first embodiment, each of the cushioning members 40 has a shape in which a horizontally elongated oblong oval cylinder 42 is partitioned into four spaces 44 by a substantially horizontal H-shaped thin wall 43. Wall 43
Has little effect on the flexibility of the long cylinder 42 against a vertical load, but exerts an effect of suppressing the flexibility of the long cylinder 42 against a horizontal load. Therefore,
The three cushioning members 40 exhibit a vibration-proof effect against horizontal vibration between the floating chassis 12 and the outer chassis 11 without causing significant deformation.

Next, a third embodiment of the present invention will be described. As shown in the front view of FIG. 8, the cushioning member 50 is formed by projecting the connecting portions 25a and 26b above and below the main body portion 51. The main body 51 is divided into four spaces 54 by an X-shaped thin wall 53 in an oblong cylinder 52 having a horizontally long oval shape. Since the shapes of the connecting portions 26a and 26b and the connecting method between the buffer member 50 and the chassis 11 and 12 are the same as those in the first embodiment,
The description is omitted. The cushioning member 50 is integrally formed of butyl rubber with a dimension in the depth direction of FIG. 8 of about 6 mm and a thickness of the thin wall 53 of about 1 mm.

Similar to the first embodiment, each of the cushioning members 50 has an X-shaped thin wall 5 inside an oblong cylinder 52 having a horizontally long oval shape.
Since it is divided into four spaces 54 by 3, the thin wall 53 does not significantly affect the flexibility of the long cylinder 52 with respect to a vertical load, but has a long length with respect to a horizontal load. The effect of suppressing the flexibility of the cylinder 52 is exhibited. Therefore, the three cushioning members 50 exert a vibration damping effect on the horizontal vibration between the floating chassis 12 and the outer chassis 11 without causing a large deformation.

Next, a fourth embodiment of the present invention will be described. As shown in the front view of FIG. 9, the cushioning member 60 is formed by projecting the connecting portions 26a and 26b above and below the main body portion 61. The main body 61 is divided into three spaces 64 by a substantially V-shaped thin wall 63 in an oblong cylinder 62 having a horizontally long oval shape. The shapes of the connecting portions 26a and 26b and the connecting method between the buffer member 60 and the chassis 11 and 12 are the same as those in the first embodiment.
The description is omitted. The cushioning member 60 is integrally formed of butyl rubber with a dimension in the depth direction of FIG. 9 of about 6 mm and a thickness of the thin wall 63 of about 1 mm.

Similar to the first embodiment, each of the cushioning members 60 has a V-shaped thin wall 6 inside an oblong cylinder 62 having an oblong oval shape.
Since the thin wall 63 has a shape divided into three spaces 64 by 3, the thin wall 63 does not significantly affect the flexibility of the long cylinder 62 with respect to a vertical load, but has a long length with respect to a horizontal load. The effect of suppressing the flexibility of the cylinder 62 is exerted. Therefore, the three cushioning members 60 exert a vibration damping effect on the horizontal vibration between the floating chassis 12 and the outer chassis 11 without causing a large deformation.

The buffer members 13, 40, 50, 60 described in the first to fourth embodiments have a depth dimension of 6 m.
m, and the thickness of the thin walls 28, 43, 53, 63 is about 1 mm, but the present invention is not limited to this embodiment, and the size can be easily adjusted by the weight and balance of the floating chassis 12. In addition, the connecting portions 26a, 2
6b is not limited to the shape described in the embodiment, and a similar effect can be obtained by providing a mounting piece on the cushioning member side and mounting holes on each chassis side for connection. further,
The cushioning member 13 described in the first to fourth embodiments,
Even if the 40, 50, 60 are mounted upside down, the same effect can be obtained.

[0023]

As described above, the cushioning member for a vehicle-mounted disc reproducing apparatus according to the present invention forms a main body by partitioning the inside of a horizontally long oblong cylinder into 3 or 4 spaces by thin walls. A left-right symmetry with respect to a vertical vacant surface in the vertical direction, and at least one of the spaces is bisected by the vacant surface, and the upper and lower surfaces of the main body are connected to the floating chassis and the outer chassis, respectively. Part,
Since the cross-sectional shape orthogonal to the central axis of the oblong cylinder is made uniform over the entire area in the central axis direction, the cushioning member is deformed flexibly in the vertical direction while attenuating vibrations and horizontally. Can suppress vibration and damp vibrations without much deformation. Therefore, even when mounted on a vehicle-mounted disc reproducing apparatus, it is possible to damp vibrations without taking a large margin for horizontal vibration isolation, which is a particular problem.

If the thin walls are arranged in a substantially Y-shape, H-shape, X-shape or V-shape, the flexibility in the horizontal direction can be suppressed more effectively than in the vertical direction. And, in each of the projecting parts projecting the connecting parts from the upper and lower surfaces of the main body part,
If the mounting hole is formed by penetrating in the direction of the central axis of the elongated cylinder, the mounting on the chassis is easy and the number of steps can be reduced. Furthermore, if the cushioning member is integrally formed of a rubber material, it can be manufactured at a lower cost using an inexpensive material.

[Brief description of drawings]

FIG. 1 is a side view showing a conventional cushioning member.

FIG. 2 is a cross-sectional view showing a vehicle-mounted cushioning member of a conventional example.

FIG. 3 is a perspective view of a vehicle-mounted disc reproducing device according to the first embodiment.

FIG. 4 is a perspective view showing a relationship between a cushioning member and each chassis in the same embodiment.

FIG. 5 is an explanatory view showing the arrangement of cushioning members in the same embodiment.

FIG. 6 is a perspective view showing a modified example of each chassis in the same embodiment.

FIG. 7 is a front view of a cushioning member according to a second embodiment.

FIG. 8 is a front view of a cushioning member according to a third embodiment.

FIG. 9 is a front view of a cushioning member according to a fourth embodiment.

[Explanation of symbols] 11 Outer chassis 12 floating chassis 13, 40, 50, 60 Buffer member 25,41,51,61 Main body 26a, 26b Connection part 30a, 30b protrusion 31a, 31b mounting holes

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hiroyuki Tanaka             8-19-20 Fukasawa, Setagaya-ku, Tokyo Tanashi             N Denki Co., Ltd. F term (reference) 3J048 AA01 BA09 BD05 DA03 EA13                 3J059 AD02 BA66 BA72 BB07 BD01                       BD05 BD09 CA08 CB07 CC01                       GA21

Claims (7)

[Claims] 1. A buffer member for a vehicle-mounted disc reproducing device inserted between an outer chassis 11 and a floating chassis 12, wherein a horizontally long oblong cylinder 27 is partitioned into 3 or 4 spaces 29 by a thin wall 28. 25, the main body is symmetric with respect to a vertical vacant plane including the central axis of the oblong cylinder, and at least one of the spaces is bisected by the temporary vacant plane. Connecting parts 2 for connecting to the floating chassis and the outer chassis, respectively, on the upper and lower surfaces.
A cushioning member for a vehicle-mounted disc reproducing apparatus, wherein 6a and 26b are provided, and a sectional shape orthogonal to the central axis of the oblong cylinder is made uniform over the entire area in the central axis direction. 2. The cushioning member for a vehicle-mounted disc reproducing apparatus according to claim 1, wherein the thin wall is arranged in a long cylinder in a substantially Y-shape. 3. The cushioning member for a vehicle-mounted disc reproducing apparatus according to claim 1, wherein the thin wall is arranged in an elongated cylinder in a substantially H-shape. 4. The cushioning member for a vehicle-mounted disc reproducing apparatus according to claim 1, wherein the thin wall is arranged in an elongated cylinder in a substantially X shape. 5. The buffer member for a vehicle-mounted disc reproducing device according to claim 1, wherein the thin wall is arranged in a substantially cylindrical shape in a V-shape. 6. Each of the connecting portions is formed by providing mounting portions 31a, 31b penetrating in the central axis direction of the oblong cylinder on projecting portions 30a, 30b projecting from the upper and lower surfaces of the main body portion. The shock-absorbing member for a vehicle-mounted disc reproducing apparatus according to claim 1. 7. The cushioning member for a vehicle-mounted disc reproducing apparatus according to claim 1, wherein the cushioning member is integrally formed of a rubber material.