KR19990009470U - Dampers for CD players with horizontal wings - Google Patents

Abstract

The present invention is to improve the reproduction sensitivity of the optical pickup actuator by effectively attenuating the vibration transmitted to the deck of the CD player installed in a large passenger car with strong vibration characteristics in the low frequency region.

The present invention incorporates the oil 30 in the body 12 of the CD player damper 10, the fixed shaft 40 is immersed into the center from one side of the body 12 fixed to the chassis or deck is inserted It is a structure to improve the damping force by forming the flat blade 22 on both sides of the shaft holder 20 to be.

According to the present invention, since the deck is quickly stabilized by the vibration attenuation of the shaft holder 20 having the flat plate-shaped horizontal blade 22, the disc is formed by focusing the laser light on the disk in a stable posture in the optical pickup actuator installed in the deck. There is an effect that it is possible to reproduce the record satisfactorily.

Description

Dampers for CD players with horizontal wings

The present invention relates to a damper for a CD player having a horizontal wing, in particular a flat plate to the shaft holder in contact with the damping oil in order to effectively attenuate the vibration transmitted to the deck of the CD player installed in a large passenger car with a strong vibration characteristics in the low frequency region The present invention relates to a damper for a CD player having a horizontal wing having a horizontal wing of a mold and having improved damping force.

In general, a CD player is an apparatus for reproducing recording of a disc by forming a focus of laser light on a pit recorded on the disc by using an optical pickup actuator, focusing the reflected light into an electric signal.

The optical pickup actuator of such a device can reproduce the recording well only by accurately focusing the laser light on the recording pit of the disc. When the CD player in which the optical pickup actuator is installed is installed in a place where vibration is continuously generated, such as a vehicle, Vibration transmitted to the player makes the focus of the laser light formed on the recording pit of the disc unstable, resulting in a failure or interruption of recording and reproduction. Therefore, damping is required for the CD player for a vehicle to rapidly reduce the transmitted vibration and to increase the recording and reproduction sensitivity.

As shown in FIG. 1, the CD player having the damper for damping includes a tray 132 for seating and rotating the disk and a deck 130 provided with an optical pickup actuator for picking up the recording of the disk. 120). The CD player 110 supports the deck 130 to the chassis 120 with a tension spring 134 to protect the pickup function of the optical pickup actuator from vibrations and shocks transmitted from the chassis 120 to the deck 130. Meanwhile, the fixed shaft 136 is fixed to the chassis 120 or the deck 130 and the damper 140 is fixed to the corresponding deck 130 or the chassis 120 so that the deck 130 is provided to the damper 140. By being supported, the vibration and shock transmitted from the chassis 120 are reduced by the damping action of the tension spring 134 and the damper 140.

Damper 140, which serves as described above, is generally used oil damper 140 injecting oil 148 into the body 142, a typical oil damper 140 is shown in FIG.

As shown in FIG. 2 (a), the damper 140 injects the oil 148 into the cylindrical body 142 of which the upper side is sealed, and seals the oil 148 by sealing the lower part with the plate 150. ) Is built in. A shaft holder 144 is formed in the body 142 to be immersed downward from the upper side, and a fixed shaft 136 fixed to the chassis 120 or the deck 130 is inserted to damp the oil 148. To receive, and formed an annular groove 146 on the outer circumferential surface of the body 142 to be inserted into a circular hole formed in the chassis 120 or the deck 130 to be fixed.

Therefore, when the damper 140 is installed in the CD player 110 and actually used, the fixed shaft 136 is fixed to the chassis 120 and the damper 140 is decked as shown in FIG. When fixed to the 130, the fixed shaft 136 is inserted into the shaft holder 144 of the damper 140, the vibration transmitted from the vehicle is transmitted to the chassis 120 of the CD player 110, the fixed shaft 136 ) Will vibrate. At this time, the shaft holder 144 surrounding the outside of the fixed shaft 136 is vibrated in the oil 148, the vibration is attenuated by the damping action of the oil 148 and the damping action by the tension spring 134.

However, in the conventional damper 140 as described above, the shaft holder 144 into which the fixed shaft 136 is inserted has a cylindrical shape, so that the area in contact with the oil 148 and the contact resistance received from the oil 148 are small. Since the damping efficiency is low, the vibration transmitted from the vehicle to the CD player 110 may not be reduced quickly. In particular, the CD player installed in a place where the vibration characteristics of the low frequency region generated from the suspension device is stronger than the vibration characteristics of the high frequency region generated by the engine, such as a large passenger car, requires a large damping force because it receives a large vibration. The damper 140 has a relatively weaker damping force. Therefore, the vibration time of the optical pickup actuator installed in the CD player 110 in which the damper 140 is installed is long, so that the sensitivity of reproducing the recording of the disc is reduced.

The present invention is devised to improve the conventional problems, the object of the present invention is to improve the damping force by improving the structure of the damper to reduce the vibration transmitted from the chassis of the body to the deck with the optical pickup actuator of the CD player In this way, the vibration transmitted to the deck is rapidly reduced to improve the reproduction sensitivity of the optical pickup actuator.

The above object, the oil is embedded in the body, immersed in the center from one side of the body to form a flat horizontal wings on both sides of the shaft holder is inserted into the fixed shaft fixed to the chassis or deck to contact the oil It can be achieved by providing a damper for a CD player having a horizontal blade that has increased the area to improve the damping force.

1 is a perspective view showing a typical CD player.

2 (a) and 2 (b) are cross-sectional views showing a general CD player damper.

Figure 3 is a perspective view showing the cut in the damper for the CD player according to the present invention.

Figure 4 is a cross-sectional view showing a damper for the CD player according to the present invention.

<Explanation of symbols for main parts of drawing>

10 damper 12 body

14 plate 20 shaft holder

22: horizontal wing 30: oil

40: fixed shaft

Hereinafter, the present invention will be described in detail by explaining a preferred embodiment of the vibration reduction structure of the damper for the CD player according to the present invention.

As shown in FIG. 3, the damper of the present embodiment is an oil damper 10 installed with a tension spring to attenuate the vibration transmitted from the chassis of the CD player to the deck, and has a cylindrical body 12 having an upper side sealed thereto. Inject the oil 30 in the), and seal the lower portion with the plate 14 so that the oil 30 is embedded.

The shaft holder 20 is formed to be immersed downward from the upper side of the body 12 so that the fixed shaft 40 fixed to the chassis or the deck is inserted, and oil 30 is disposed on both sides of the shaft holder 20. The horizontal wing 22 of the flat plate type which enlarged the area which contacts is formed is formed. Each of these horizontal wings 22 serves to divide the oil 30 of the upper and lower sides.

And to form an annular groove 16 on the outer circumferential surface of the body 12 to be inserted and fixed in the circular hole formed in the chassis or deck.

The damper 10 is the horizontal blade 22 and the body 12 by the horizontal blade 22 formed in the shaft holder 20, the oil 30 inside the body 12 when the fixed shaft 40 vibrates As it moves between and flows up and down, a large attenuation effect can be obtained. Therefore, when the damper 10 is installed in the CD player installed in a place where the vibration characteristic of the low frequency region transmitted from the suspension device is stronger than the vibration characteristic of the low frequency region generated from the engine, such as a large passenger car, the vibration is slow and wide. Can be effectively attenuated.

When the damper 10 having the flat blade 22 having the configuration as described above is installed on the CD player and actually used, the damper 10 is formed in an elliptical shape with a narrow width in the vertical direction as shown in FIG. Is installed. The damper 10 is fixed to the chassis or deck. When the damper 10 is fixed to the chassis, the damper 10 is fixed to the deck to be inserted into the shaft holder 20 of the damper 10, and the damper When 10 is fixed to the deck, the fixed shaft 40 is fixed to the chassis to be inserted into the shaft holder 20 of the damper 10.

When the vehicle on which the CD player is installed operates, the chassis of the main body is vibrated by vibration of the high frequency region generated from the engine and vibration of the low frequency region transmitted from the suspension device by vibrating the vehicle body according to the road surface condition of the road. Thus, the fixed shaft 40 is vibrated. Since the vibration transmitted from the engine and the outside of the vehicle acts in the vertical direction, the vibration of the fixed shaft 40 acts mainly in the vertical direction. Therefore, the horizontal blade 22 formed on the shaft holder 20 can be effectively attenuated by the vibration of the fixed shaft 40 only when it is exactly horizontal, installation of the damper 10 so that the angle of the horizontal blade 22 is exactly horizontal Adjust the angle

Hereinafter, the operation of the damper assembled as described above will be described.

The damping operation will be described, for example, in the case where the fixed shaft 40 is installed in the chassis and the damper 10 is installed in the deck.

When the vibration is transmitted to the CD player and the fixed shaft 40 vibrates, the shaft holder 20 into which the fixed shaft 40 is inserted vibrates while contacting the oil 30 in the body 12. The shaft holder 20 The flat blade 22 formed on both sides of the contact with the oil 30 in a large area, the oil 30 is moved to the side by turning the shaft holder 20 and the horizontal blade 22 large horizontal blade ( It flows up and down between the body 22 and the body 12. Accordingly, the damping force is increased by the horizontal blades 22 formed in the shaft holder 20, and thus the vibration of the fixed shaft 40 is rapidly reduced.

When the fixed shaft 40 is installed on the deck and the damper 10 is installed in the chassis, the damper 10 does not vibrate without the fixed shaft 40 vibrating. It is the same as the case in which the fixed shaft 40 is installed on the damper 10 is installed on the deck.

Therefore, the deck provided with the damper 10 is quickly stabilized by the vibration damping action of the damper 10 and the vibration damping action of the tension spring that supports the deck to the chassis, so that the deck in the optical pickup actuator installed in the deck The focus of the laser light is formed on the disk. As a result, recording reproduction sensitivity of the optical pickup actuator is improved.

As described in the above embodiment, the present invention incorporates the oil 30 in the body 12 of the CD player damper 10, and is immersed into the center from one side of the body 12 to the chassis or deck The damping force is improved by forming the flat blade 22 on both sides of the shaft holder 20 into which the fixed shaft 40 is inserted, and the flat holder 22 is formed on the shaft holder 20. Since the deck is quickly stabilized by the vibration attenuation action of), the optical pickup actuator installed in the deck has the effect of forming the focus of the laser light on the disk in a stable posture, so that the recording of the disk can be satisfactorily reproduced.

Claims (1)

In the damper for CD player in which the oil 30 is embedded in the body 12, and the shaft holder 20 into which the fixed shaft 40 is inserted from the one side of the body 12 into the center is immersed, The damper for a CD player having a horizontal blade, characterized in that the horizontal blade (22) of the plate type formed on both sides of the shaft holder (20).