JPH0435630Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a vibration-proof support device used for a support portion of an optical pickup unit in a compact disc player.

[Technical background and conventional technology]

FIG. 6 shows the main parts of the compact disc player.

Reference numeral 1 in the figure is a support base material. This supporting base material 1 is the chassis of a compact disc player. On this chassis, an optical pickup unit 2 is supported as a supported member by a vibration isolating support device 3.

On the base 4 of the optical pickup unit 2, there is a motor mechanism 5 that supports and rotates the compact disk D, a reading mechanism 6 that faces the recording surface of the compact disk D in a non-contact manner, and a reading mechanism 6 that connects the reading mechanism 6 to the disk. A guide mechanism 7 for moving along the direction D is mounted.

In a compact disc player, the reading mechanism 6
The laser beam emitted from the objective lens 6a is made to follow the information track on the recording surface of the compact disk D, thereby reading digital information. A tracking servo device and a focusing servo device are provided in the reading mechanism 6, and the objective lens 6a is slightly moved at a relatively high frequency to correct the irradiation state of the laser beam. Therefore, when a compact disc player is directly exposed to external vibrations or shocks,
The above-mentioned servo device will not be able to make sufficient corrections, which will cause problems in the reading operation. Therefore, in order to protect the optical pickup unit 2 from external vibrations and expect high-precision operation,
The function of the anti-vibration support device 3 has a great influence.

The conventionally devised anti-vibration support device 3 has a screw member 3a fixed to the support base material 1 and a support fitting 3b provided at the lower end of the screw member 3a. Coil spring 3c between
A hollow rubber member 3d is interposed therebetween. This conventional anti-vibration support device 3 is set to have an appropriate spring constant and a high damping coefficient by utilizing the characteristics of the coil spring 3c and the characteristics of the hollow rubber member 3d. .

[Problems with conventional technology]

However, the conventional anti-vibration support device 3 described above is
In FIG. 6, a predetermined vibration-proofing function can be achieved with respect to vibrations in the vertical direction, but there is a drawback that vibrations in the horizontal direction in the figure cannot be sufficiently absorbed. In particular, recent compact disc players are being considered for various uses such as portable and vehicle-mounted, so they are required to be able to cope with vibrations from multiple directions.
However, the vibration isolating device 3 shown in FIG. 6 cannot fully satisfy these requirements.

Therefore, recently, a vibration-proof support device, as shown in FIG. 7, has been developed in which air or liquid rubber 9 is sealed inside a thin-walled bag 8. In this anti-vibration support device, a portion of the bag 8 is curved, so that the curved portion A can absorb vibrations in multiple directions. If such a vibration-proof support device is used, it will be ideal for portable compact disc players and the like. However, in this case, the thin-walled bag body 8 is formed of a rubber material,
Moreover, this bag body 8 must be formed in a shape having a curved portion A. In order to mold the bag body 8 having the curved portion A from a thin rubber material, a complicated mold is required, and there is a problem in that an extremely sophisticated manufacturing technology is required.

[Purpose of invention]

The present invention was developed by focusing on the above-mentioned conventional problems, and has a structure in which a thin-walled bag with a curved part is formed and air or liquid is sealed inside the bag to prevent vibrations from multiple directions. The purpose is to provide a vibration-proof support device that can exhibit sufficient vibration-proofing function, and also allows a thin-walled bag to be molded into a simple shape during the manufacturing process, thereby simplifying manufacturing.

[Summary of the idea]

The present invention relates to a vibration-proof support device in which an elastic support member made of an elastic material is provided on a supporting base material, and a supported member is supported by this elastic support member, the elastic support member being formed from a bag body containing a fluid inside and a support shaft extending integrally from one end of the bag body, and in a free state, an opening angle of 90 degrees or more is formed between the surface of the bag body and the support shaft at the joint between the bag body and the support shaft, and when the supported member is supported by the support shaft, a curved portion is formed on the outer periphery of the bag body and the joint between the bag body and the support shaft extends into the bag body, and in this state, a curved portion is formed on the bag body at the joint between the bag body and the support shaft such that the opening angle is less than 90 degrees.

In the present invention, a bag having a simple shape is formed in advance using a mold, and then the bag is deformed to form a curved portion. Therefore, the thin-walled portion can be easily molded and the manufacturing cost can be reduced. Moreover, in the completed state, the bag body having the curved portion can exhibit a sufficient vibration absorbing function against vibrations from multiple directions.

[Example of idea]

Embodiments of the present invention will be described below with reference to the drawings of FIGS. 1 to 5.

Fig. 1 is a cross-sectional view of an elastic support member constituting a vibration isolating support device according to the present invention, Fig. 2 is a side view showing the outer shape of the elastic support member immediately after molding, and Fig. 3 is an elastic support member according to another embodiment. 4 is a left side view thereof, and FIG. 5 is a perspective view showing the optical pickup unit supported by the elastic support member according to the present invention.

This anti-vibration support device is installed, for example, in a small, portable compact disc player and is used to support an optical pickup unit.

The elastic support member 20 includes a bag body 21 and closing members 22a and 22 that close the opening of the bag body 21.
It is composed of each member b. Bag body 21
is formed of a rubber material to a thickness of approximately 0.5 to 1 mm, and the entire wall is formed to have the same thickness. Further, a support shaft 23 is integrally formed at the distal end of the bag body 21, and a fixed head 24 is integrally formed at the distal end of the support shaft 23. Bag body 21
Immediately after molding, as shown in FIG. 2, the opening angle θ between the surface of the bag body 21 and the support shaft 23 is 90 degrees or more. After the bag body 21 as shown in FIG. 2 is once molded, the connecting portion between the support shaft 23 and the bag body 21 is pushed toward the closing member 22a, resulting in a curved portion A as shown in FIG. and B are formed. In this state, the bag body 21
The opening angle between the surface of the support shaft 23 and the support shaft 23 is less than 90 degrees. The interior space of the bag body 21 is filled with air, liquid rubber, or the like.

FIG. 5 shows a case in which the optical pickup unit 2 is supported by the vibration isolation support device 20 having the above structure. In this example, the support shaft 23
A fixed head 24 at the tip of the base 4 is fitted onto the side surface of the base 4. Two anti-vibration support devices 20 are attached to two sides of the base 4 in parallel. Further, the base end of the vibration-proof support member 20, that is, the closing member 22a,
The outer surface of 22b is fixed to a supporting base material 10 (indicated by a dashed line in FIG. 1) such as a chassis of a compact disc player. This support base material 10 corresponds to the chassis 1 shown in FIG. The optical pickup unit 2 is supported by the support base material 10 not only by the vibration isolation support device 20 but also by a coil spring.

Next, the vibration-proofing operation will be explained.

The base 4 (supported member) of the optical pickup unit 2 is supported by a vibration isolating support device 20 and a coil spring, but large vibrations with a relatively low frequency are absorbed by the coil spring, and High and fine vibrations can be absorbed by the anti-vibration support device 20 of the present invention.

The vibration isolation support device 20 according to the present invention is capable of absorbing vibration components in each direction. That is, vibrations in the axial direction indicated by X in FIG. 1 are absorbed by deformation of the bag body 21 in the direction in which the support shaft 23 and the closing members 22a, 22b face each other. During this deformation, the elasticity of the bag body 21 itself,
Vibrations are damped by the flow of air or liquid rubber sealed inside the bag body 21. Further, vibrations in the horizontal direction indicated by Y are absorbed by the movement of the support shaft 23 in the Y direction relative to the bag body 21. This vibration is also damped by the deformation of the bag body 21 and the flow of air and liquid rubber inside. Especially in the state shown in Figure 1,
A curved portion A is formed on the outer periphery of the bag body 21, and further, at the joint between the bag body 21 and the support shaft 23, the bag body 21
Since a curved portion B with an opening angle of less than 90 degrees is formed between the surface of the support shaft 23 and the support shaft 23, the initial strain in the curved portions A and B allows the damping function to be greatly exerted against minute vibrations. Become.

In this way, vibration in each direction can be effectively received by the vibration isolating support device 20, so the optical pickup unit 2 is not limited to being installed horizontally as shown in FIG. It is possible to achieve sufficient anti-vibration function even when installed in Therefore, it can also be installed in a portable or vehicle-mounted compact disc player.

Next, FIGS. 3 and 4 show other embodiments. In this embodiment, a mounting groove 22c is formed on the outer surface of the closing member 22 provided at the base of the bag body 21.
is formed, and the attachment groove 22c allows for easy attachment to the support base material 10.

In FIG. 5, the vibration isolating support device 20 is attached to both sides of the base 4, but the vibration isolating support device 20 may be oriented vertically and provided below the base 4. Alternatively, as shown in FIG. 6, it is also possible to have a dual structure of the vibration isolating support device 20 and the coil spring 3c.

Further, this vibration isolation support device can be used not only as a support mechanism for an optical pickup unit, but also for other audio equipment and other equipment.

[Effect of idea]

As described above, according to the present invention, the following effects can be achieved.

(1) The bag is initially formed in a straight state, and the connecting part between the support shaft and the bag is inserted into the bag to form a curved part. Therefore, the bag can be easily molded using a mold with a simple shape. Therefore, the thin wall portion of the bag can be formed uniformly, and molding defects will not occur.

(2) In the completed state, a curved part is formed in the bag, so the deformation of this curved part can absorb vibrations in multiple directions, and by applying initial strain to the curved part, it is possible to absorb vibrations in multiple directions. It becomes possible to attenuate amplitude vibrations and absorb them effectively. Therefore, it can be used satisfactorily in portable and vehicle-mounted devices.

[Brief explanation of the drawing]

Fig. 1 is an enlarged sectional view showing a vibration isolating support device according to the present invention, Fig. 2 is a front view showing the outer shape of the bag immediately after molding, and Fig. 3 is a vibration isolating support device according to another embodiment. Cross-sectional view, Figure 4 is its left side view, Figure 5
The figure is a perspective view showing a state in which an optical pickup unit is supported in a compact disc player as an example of the use of the anti-vibration support device, FIG. 6 is a side view showing a state in which it is supported by a conventional anti-vibration support device, and FIG. 7 FIG. 2 is a sectional view showing a conventional elastic support member. 2... Optical pickup unit serving as a supported member, 4... Base, 10... Support base material, 20
...Elastic support member, 21...Bag body, 22, 22
a, 22b...Closing member, 23...Support shaft, A...
...Curved section.

Claims (1)

[Scope of utility model registration request] In a vibration damping support device in which a support base material is provided with an elastic support member made of an elastic material, and a supported member is supported by the elastic support member, the elastic support member has a fluid inside. It is formed from a bag body in which is sealed and a support shaft extending integrally from one end of the bag body, and in a free state, at the joint between the bag body and the support shaft, there is a 90-degree angle between the surface of the bag body and the support shaft. When an opening angle of more than 1° is formed and the supported member is supported by the support shaft, a curved portion is formed on the outer periphery of the bag, and the joint between the bag and the support shaft enters the inside of the bag. 2. A vibration isolating support device characterized in that a curved portion is formed in the bag at a joint portion between the bag and the support shaft in such a state that the opening angle is less than 90 degrees.