JPH03234942A - Oil-filled damper - Google Patents

Abstract

PURPOSE:To make a device thin by preparing a cylindrical damper holder of nearly elliptical cross section and a freely deformable damper body filled in with viscous oil and provided with a flange on one end portion, and pressing the whole damper body into the damper holder. CONSTITUTION:The whole of a freely deformable damper body 304 is injected into a damper holder 302 of elliptical cross section. In the central portion of the damper body 304, a supporting hole 305 to be supported with a projecting support provided on the four corners of a chassis is provided. In the body 304 viscous silicone oil 306 is filled up, and to a flange 307 on the body 304, a circular cover plate 308 is fixed with adhesive. And the displacement between the damper holder 302 and the body 304 can be prevented by pressing the flange to the inner wall of the holder 302. And by the pressing of the flange 307, the inner pressure due to the oil 306 can be increased.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an oil-filled damper that absorbs vibrations of a mechanical chassis of a CD player caused by external force.

(Prior art) In-vehicle CD players have to deal with the special conditions of use inside a car, such as securing installation space, humidity, temperature, vibration,
Consideration must be given to issues such as stiffness and operability.

In particular, while the vehicle is running, it is required to maintain a constant distance between the disk and the pickup head by preventing vibrations of the vehicle, and to faithfully reproduce information from the disk.

For this reason, a carriage mechanism equipped with a pickup, clamp mechanism, etc., which is normally in a locked state, is unlocked by the lock mechanism when information is reproduced from the disc, and a vibration isolation mechanism equipped with an anti-vibration spring, damper, etc. is released. floating to the loading mechanism via.

FIG. 4 and FIG. 5 show an example of a damper of the above-mentioned vibration isolation mechanism.

As shown in these figures, the damper 1 includes a damper holder 2 having a circular cross section and a damper main body 3 having a flange 3a and held inside the damper holder 2. A clamping hole 4 is provided in the center of the damper body 3 for clamping bottles (not shown) protruding from the four corners of a chassis on which a carriage mechanism is mounted. Damper body 3
The inside is filled with viscous silicone oil 5. A disc-shaped lid portion 7 is fixed to the flange 3a of the damper body 3 via an adhesive 6.

The damper 1 having such a configuration has a lid portion 7 of the damper holder 2.
The vicinity of the side is fixed to the chassis of the loading mechanism. Vibrations of the chassis of the carriage mechanism due to vibrations of the vehicle or the like are absorbed by the viscosity of the silicone oil 5.

(Problems to be Solved by the Invention) Generally speaking, in-vehicle CD players have the following problems:
Due to the space available inside the vehicle, it is required to be smaller and thinner.

However, in the conventional damper 1 described above, the diameter of the damper body 3 is φd1, and the diameter of the flange 3a is larger than φd, ranging from 1φD.

In other words, φd is determined by the vibration stroke of the chassis on which the carriage mechanism is mounted, and is a diameter essential for vibration isolation. On the other hand, φD is not indispensable for vibration isolation4, and φD-φd is an extra dimension. In this way, a space of φD is required inside the CD player main body, especially in the thickness direction, in order to accommodate the damper I.

Therefore, the extra space of φD-φd becomes a factor that increases the thickness of the CD player body, and becomes an obstacle to making the CD player thinner.

The present invention was made in response to these circumstances, and
An object of the present invention is to provide an oil damper that allows the device to be made thinner.

(Means for Solving the Problems) In order to achieve the above object, the oil damper of the present invention includes a cylindrical damper holder whose cross section is approximately elliptical;
The damper body is characterized in that it is provided with a deformable damper body whose interior is filled with viscous oil and has a flange provided at one end edge, and the entire damper body is press-fitted into the damper holder.

(Function) In the oil seat damper of the present invention, since the damper main body is deformable, the cross section of the damper holder can be made into a substantially elliptical shape. Furthermore, misalignment between the damper holder and the damper main body is prevented by pressing the flange against the inner wall of the damper holder. Therefore, by making the cross section approximately elliptical, the dimension of the damper holder in the thickness direction can be reduced, thereby making it possible to reduce the space for the damper in the thickness direction inside the CD player main body.

(Example) Hereinafter, details of an example of the present invention will be described based on the drawings.

FIG. 1 shows an embodiment in which the oil damper of the present invention is applied to a vehicle-mounted CD player.

As shown in the figure, the CD player is equipped with a loader mechanism (hereinafter simply referred to as L mechanism) 100, a carriage mechanism (hereinafter simply referred to as C mechanism) 200, and a vibration isolation mechanism 300.

The L mechanism 100 is provided with a chassis 101.

A release lever 102 is disposed on the chassis 101 so as to be movable along the depth direction on one side thereof. One end of the release lever 102 has a lower end connected to the chassis 101.
An upper end portion of a restraining lever 103 rotatably mounted via a shaft 103A is loosely fitted to the upper end portion of the restraining lever 103. The restraint lever 103 is provided with a protrusion 103X and a notch 103Y that restricts vertical movement of a gear shaft, which will be described later. The chassis 101 also includes an arm 105 pivotally connected to a shaft 105A.
A loading arm 104 that swings in a vertical plane is attached to the arm 105.

The loading arm 104 has a window hole 104A.

104B are formed, and the shaft of a gear, which will be described later, is passed through these window holes. At the tip of the loading arm 104, a stop bin 104X and a connecting pin 104Y, which will be described later, restrict the movement of the clamp arm, are protrudingly provided. Furthermore, a free arm 106 is attached to the loading arm 104 via a shaft 106A that supports the shaft 83A of the loading roller 83. free arm 106
A shaft of a large gear 115, which will be described later, is attached to the end of the shaft, and the shaft is connected to the window hole 104 of the loading arm 104.
It is placed in B. Then, when the large gear 115 retreats from the internal gear 122 of the gear arm 120, which will be described later,
Free arm 106 rotates clockwise.

A loading motor 110, which serves as a power source for loading the disk D, is attached to the arm 105. A pinion 111 is attached to the rotating shaft of the loading motor 1100, and the pinion 111 meshes with a reduction gear 112 pivotally supported by the loading arm 104. The reduction gear 112 is the loading arm 104
The reduction gear 113 meshes with the reduction gear 113 pivotally supported by the reduction gear 113.
is the reduction gear 1 coaxial with the pivot shaft 106A of the free arm 106.
It meshes with 14. Reduction gear 114 is free arm 10
It meshes with a large gear 115 attached to the tip of 6. The binion 116 provided coaxially with the large gear 115 is
It meshes with a partial internal gear 122 of a gear arm 120 which has a recess 123 attached to the mechanical chassis 101 via a screw 121.

Further, the chassis 101 is provided with a switching arm 130 that is pivotally connected to a shaft 131. A U groove 132 is formed at one end of the switching arm 130, and a guide pin 133 protrudes from the other end. It is set up.

One end of the spring 134 is locked to the shaft 181, and a connecting pin 104 protrudes from the tip of the loading arm 104.
The other end of the spring 134 is locked to Y.

The chassis 1 is attached to the guide pin 133 of the switching arm 130.
One end of a lock arm 140 is connected to the lock arm 140, which is pivotally mounted on the shaft 141 of the 01 and biased counterclockwise by a spring 145. A hook groove 143 is formed at the other end of the lock arm 140, and this groove is adapted to engage with a shaft 210 of a carriage mechanism 200, which will be described later.

Furthermore, a loose through hole 150 is formed in the chassis 101, and the shaft 210 of the carriage mechanism 200 is exposed from this loose through hole 150, and the hook groove 143 of the lock arm 140 is engaged with the shaft 210 of the carriage mechanism 200.

The end of the shaft 83A of the loading roller 83 is arranged on the same axis as the shaft 106A of the free arm 106, and performs a partial circular arc movement together with the loading arm 104.

The C mechanism 2°O supported by the shaft 210 has
A chassis 203 having a support shaft 203a is provided. A clamp arm 202 having a clamper 201 is pivotally attached to a shaft 204 on the upper surface of the chassis 203 . The clamp arm 202 is urged downward by a coil spring 205 whose end is locked to the chassis 203.

At a position facing the clamper 201, there is a turntable 2 attached to a rotating shaft 208 of a spindle motor 206.
07 is placed.

The turntable 207 is made of the same material as the disc D.
For example, it is made of resin such as polycarbonate.

As a result, during clamping, the coefficients of linear expansion of the disk D and the turntable 207 due to changes in outside air temperature, etc. become equal, so that no center runout of the disk occurs.

On the pivoting side of the clamp arm 202, two stop pins 208 for positioning the disk are arranged downward.

Further, an arm 161 is pivotally attached to the chassis 101 via a pin 160 that contacts the edge of the disk D in the direction of the arrow against the biasing force of a spring 102B.

The chassis 203 in the clamp special number is kept in a floating state by the vibration isolating spring 301 and damper 303 of the vibration isolating mechanism 800.

2 and 3 show the damper of the vibration isolation mechanism 300. FIG.

As shown in these figures, the deformable damper body 304
The whole is press-fitted into a damper holder 302 having an elliptical cross section. A clamping hole 305 is provided in the center of the damper body 304 to clamp supports 203a protruding from the four corners of the chassis 203. The inside of the damper body 304 is filled with silicone oil 806 that increases viscosity. A disk-shaped lid portion 308 is fixed to the flange 307 of the damper body 304 via an adhesive.

Misalignment between the damper holder 302 and the damper main body 304 is prevented by pressing the flange against the inner wall of the damper holder. Further, by pressing the flange, the internal pressure due to the silicone oil 306 increases.

Furthermore, since the cross section of the damper holder 302 is elliptical, the entire damper body 304 can be easily press-fitted.

A CD player having such a configuration operates as follows.

First, when the clamp is released, the lock groove 143 of the lock arm 140 engages with the shaft 210 of the C mechanism 200, thereby restricting movement of the C mechanism 200. Further, the switching arm 130 is positioned in the illustrated state due to the biasing force of the spring 134.

At this time, the pinion 116 is located in the concave portion 123 separated from the internal gear 122 of the gear arm 120. Free arm 1 coaxial with pinion 116
The shaft 106B of 06 is connected to the notch 103 of the restraining lever 103.
It fits into Y and its movement is restricted. The swinging arm 104 has a shaft 105A that is a swinging fulcrum of the arm 105.
It is located at the uppermost rotated position with .

Then, when the disk D is set, the loading motor 110 is driven. This driving force is generated by the pinion 111
, gears 112, 113, 114, large gear 115, and pinion 116.

At this time, the pinion 116 is located in the concave portion 123 of the gear arm 120, so it is in an idling state.

Next, the disk D is taken in by the loading roller 83 and when it reaches the clamping position, its edge is held against the pin 1.
62 in the direction of the arrow. Thereby, when the arm 161 rotates via the shaft 162, the release lever 102 is pushed out in the direction of the arrow.

When the release lever 102 moves in the direction of the arrow, the restraint lever 103 moves counterclockwise twice via the shaft 103A, thereby releasing the shaft 106B engaged with the notch 103Y.

At this time, when the free arm 106 slightly rotates clockwise due to friction caused by the clockwise rotation of the gear 114, the pinion 116 escapes from the concave portion 123 and meshes with the internal gear 122. As a result, loading arm 10
4 rotates clockwise. Also, loading arm 1
04, the stop bin 104X moves downward, and the downward rotation of the clamp arm 202 is released.

As a result, the clamper 201 of the clamp arm 202 moves toward the turntable 206 and presses the center of the disk D against the turntable 206. At this time, as the loading arm 1040 rotates, the switching arm 130
rotates counterclockwise via shaft 131. As the switching arm 1300 rotates, the lock arm 140 that engages with the shaft 210 rotates clockwise via the shaft 141. As a result, the shaft 210 of the C mechanism 200
When the C mechanism 200 is released and placed in a free state within the free through hole 152, the C mechanism 200 is placed in a floating state via the vibration isolating mechanism 300.

In this state, the spindle motor 206 is driven, and when this driving force is applied to the disk D via the turntable 206 made of the same material as the disk D, the disk D rotates. At the same time, the pickup head (not shown) of the pickup located on the bottom side of the disk D
Read the information on the recording surface. At this time, even if the chassis 203 vibrates due to vehicle vibration, the vibration is absorbed by the viscosity of the silicone oil 806 within the damper body 303.

Subsequently, when the clamp is released, the free arm 106 slightly rotates counterclockwise due to the friction caused by the counterclockwise rotation of the gear 114, and the pinion 116 meshes with the internal gear 122. Next, the pinion 116 is connected to the internal gear 1
By moving upward along 22, each of the parts described above performs a reverse movement. Then, when the lock arm 140 rotates counterclockwise, the lock groove 143 locks into the C mechanism 2.
400 shaft 210. At this time, arm 1
60 pins 162 are back within the rotation area of disk D.

As described above, in this embodiment, the cross section of the damper holder is elliptical, and the entire deformable damper body is press-fitted into the elliptical shape, so that the dimension in the thickness direction of the damper holder is small. The space for the damper in the thickness direction is small (In this example, the present invention is applied to a car-mounted CD player, but the invention is not limited to this example, but can be applied to other home-use CD players, etc.) You may.

(Effects of the Invention) As explained above, according to the oil damper of the present invention, by making the cross section of the damper holder approximately elliptical, the dimension in the thickness direction of the damper holder is reduced, and as a result, the inside of the CD player main body Since the damper space in the thickness direction is small, the device can be made thinner.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the CD player of the present invention, FIGS. 2 and 3 are views showing a damper of the damper mechanism of FIG. 1, and FIGS. 4 and 5 are views of a conventional damper. It is a figure which shows the damper of a mechanism. DESCRIPTION OF SYMBOLS 100...Loading mechanism, Iol...Mechanical chassis, 103...Restriction lever 104...Loading arm, 106...Free arm, 120...Gear arm, 130...Switching arm, 140...・Lock arm, 143... Lock groove, 160... Arm,
200... Carriage mechanism, 201... Clamper, 202... Clamp arm, 203... Chassis, 206... Turntable, 210... Shaft, 302... Damper holder, 303... Damper , 304... damper body, 305... clamping hole, 80
6... Silicone oil, 308... Lid.

Claims (1)

[Claims] (1) A cylindrical damper holder having a substantially elliptical cross section and a deformable damper body filled with viscous oil and having a flange provided at one end edge, the damper body An oil-filled damper characterized in that the entire damper is press-fitted into the damper holder.