JP2658989B2 - Chucking device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chucking device for holding a disk, such as an optical disk, together with the disk table on a disk table of a disk rotation operation mechanism so that the disk rotates integrally with the disk table.

[0002]

2. Description of the Related Art Conventionally, in a disk player using an optical disk having a diameter of 12 cm as a recording medium, as shown in FIG. 8, a disk 71 is placed horizontally and moved to move inside and outside a player main body 70. One having a disk tray 72 is known. The disc player loads the disc 71 placed on the disc tray 72 or ejects the loaded disc 71 when the disc tray 72 is moved in and out of the player main body 70.

When the disc tray 72 is moved inward of the player main body 70, the disc table 7 provided in the player main body 70 is moved.
The optical pickup 74 that scans the disk 71 mounted on the disk table 73 and the disk rotating operation mechanism provided with the optical disk 3 and reads out information signals recorded on the disk 71 rises to the disk tray 72 side. When the disk rotation operation mechanism and the optical pickup 74 rise,
The disk 71 placed on the disk tray 72 is lifted from the disk tray 72 by the disk table 73 and is placed on the disk table 73. This disk table 73 is formed of a magnetic material such as iron.

When the disk rotation operation mechanism is raised, a magnet 82 constituting a chucking device rotatably disposed in the player body 70 so as to face the disk table 72 via the holder 75 is provided. The chucking member 76 is magnetically attracted to the disk table 72. When the chucking member 76 magnetically attracts the disk table 72, the disk 71 mounted on the disk table 72 is sandwiched between the disk table 72 and the chucking member 76, and
2 and become rotatable together.

[0005] Here, when the spindle motor constituting the disk rotation operation mechanism rotates, the disk 71 is rotated.
Is rotated integrally with the disk table 72. At this time, when the optical pickup 74 is moved in the radial direction of the disk 71, the information signal recorded on the disk 71 is reproduced.

Here, the chucking device for holding the disk 71 in coordination with the disk table 73 will be described more specifically. As shown in FIG. 9, the chucking device includes a ring-shaped magnet 82, First and second disks 83 and 81 disposed on the lower end and upper end of the magnet 82, respectively.
And a chucking member 76 comprising: The first disk 83 provided on the lower end side of the magnet 82 constituting the chucking member 76 is formed of a synthetic resin,
The second disk 81 provided on the upper end side of the magnet 82 is formed of a magnetic material such as iron. The first and second disks 83 and 81 are smaller than the inner diameter of an opening 75a formed in the holder 75 to which the chucking member 76 is attached, and are ring-shaped protruding into the opening 75a. It is formed larger than the inner diameter of the protruding portion 75b.
Further, the magnet 82 is formed in a ring shape having a smaller diameter than the inner diameter of the protruding portion 75b.

The chucking member 7 constructed as described above
6 is mounted on a holder 75 provided on the player main body 70, a second disk 83 is provided on a projection 75b projecting into an opening 75a of the holder 75, and a magnet 82 is attached to the opening 75a. The second disc 83 is sucked by being inserted into the second disc 83. Then, a first disk 83 is disposed on the lower surface side of the protruding portion 75b with the magnet 82 interposed therebetween, and the first disk 83 is
Attached to the circular plate 81. To attach the second disk 83 to the first disk 81, a plurality of engaging claws 83a projecting from one main surface of the first disk 83 are attached to the inner peripheral side of the ring-shaped magnet 82. Engagement hole 81a penetrated and drilled in first disc 81
It is attached by inserting and engaging.

[0008]

In the conventional chucking device constructed as described above, the first chucking device is provided with the holder 75 interposed therebetween.
It is necessary to assemble the second discs 83 and 81, and the chucking member 76 is in an independent state until it is attached to the holder 75, so that the assembling process is complicated. Further, since it is necessary to handle a large number of components in a state where the components are attached to the disc player, it is difficult to supply and manage the components.

Therefore, in order to simplify attachment of the chucking member to the disc player and facilitate component management, a chucking member composed of a plurality of components is attached to the disc player in a previously assembled state. King devices have been proposed.

In this chucking device, as shown in FIG. 10, an opening 91a to which a chucking member 76 provided on a holder 91 is attached is opened. That is, the notch 9 communicating with the opening 91 a in the holder 91.
1b is provided. By providing the cutout portion 91b and forming the opening portion 91a in this manner, the first and second disks 83, 81 having large diameters are attached to the upper and lower ends of the ring-shaped magnet 82, and are previously formed. The assembled chucking member 76 can be attached to the holder 76. That is, the chucking member 76 is attached to the holder 91 by inserting the ring-shaped magnet 82 through the notch 91b.

In the chucking device thus constructed, the notch 91b is formed with a width equal to or slightly larger than the outer diameter of the ring-shaped magnet 82 in order to mount the chucking member 76 assembled in advance. There is a need. Therefore, when an impact is applied in a direction indicated by an arrow D in FIG. 10, which is a direction opposite to the direction indicated by an arrow C in FIG. 10, which is a direction in which the chucking member 76 is fitted into the holder 75, the chucking member 76 moves from the holder 91. There are problems such as easy detachment. Further, the strength of the free pieces 91c on both sides of the notch 91b provided to open the opening 91a is deteriorated, and when the impact is applied, the chucking member 76 is easily detached. An accident occurs.

Accordingly, an object of the present invention is to solve the above-mentioned problems of the previously proposed chucking device and to provide a chucking device which is easy to assemble and has excellent durability. It is a proposal.

[0013]

SUMMARY OF THE INVENTION A chucking device according to the present invention proposed to achieve the above-mentioned object comprises a cylindrical portion, and cylindrical portions provided on the upper and lower ends of the cylindrical portion, respectively. A pair of disk portions having an outer diameter larger than the outer diameter of the portion, a chucking member for holding the disk together with the disk table, and an opening through which the cylindrical portion is inserted is formed, and the cylindrical portion is inserted through this opening. A holder on which the chucking member is rotatably mounted; a plurality of tongue pieces having an inclined surface provided on one of the disk portions located at the lower end of the column portion; and a plurality of tongue pieces provided on the inner peripheral side of the opening. A plurality of projections projecting inwardly of the opening so as to have a diameter larger than the diameter of the columnar part, and one of the disk parts being relatively engaged with the inclined surface of the tongue piece part so that the lower surface of the holder is formed. Provided on multiple protrusions to guide to the side And a the introduction. Then, by rotating the chucking member with respect to the holder in a state where one of the disk portions is placed substantially horizontally on the plurality of protrusions, the inclined surface of the tongue piece and the introduction portion are relatively engaged with each other, In this state, the chucking member is further rotated to move the inclined surface to the lower side of the protrusion along the introduction portion, and further rotation of the chucking member releases the engagement between the tongue piece and the protrusion. The chucking member is configured to be rotatably attached to the holder and to be fixed.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a chucking device according to the present invention will be described with reference to the drawings. The chucking device according to the present invention holds a disk with magnetic attraction together with a disk table of a disk rotation operation mechanism constituting a disk player, similarly to the above-described conventional chucking device. As shown in FIG. 1, a king member 5 is rotatably attached to an opening 4a formed in a holder 4 provided in the player main body.

As shown in FIG. 2, a chucking member 5 constituting the chucking device is inserted into an opening 4a provided in the holder 4, and forms a cylindrical portion which rotates in the opening 4a. A magnet 3 and first and second discs 2 and 1 forming a pair of discs disposed on the lower end and the upper end of the magnet 3, respectively. The first disk 2, which is one disk portion disposed on the lower end side of the magnet 3 constituting the chucking member 5, is made of synthetic resin and the other disposed on the upper end side of the magnet 3. The second disk 2 which is a disk part of the above is formed of a magnetic material such as iron.

Then, the first magnet provided at the lower end of the magnet 3
As shown in FIGS. 2 and 3, for example, three notches are formed at equal intervals in the circumferential direction on the outer peripheral side of the circular plate 2 so that three fan-shaped tongue pieces 2b are equally spaced. Is provided. An inclined surface 2a is formed on one side of the tongue 2b substantially parallel to the radial direction of the first disk 2.

On the inner peripheral side of the opening 4a provided in the holder 4, a plurality of, for example, three fan-shaped projections 4 are formed at equal intervals.
c is projected. That is, these projections 4c
The whole is arranged in a ring shape. And these three
As shown in FIG. 3, one of the protrusions 4 c is relatively engaged with the inclined surface 2 a provided on the first disk 2 to guide the first disk 2 to the lower surface of the holder 4. 2, an introduction portion 4b rising in the direction of the rotation axis in the direction of arrow A in FIG. 2 is formed. On the lower surface side of each of these introduction portions 4b, an introduction portion inclined surface 4d is provided, and engages with the inclined surface 2a of the first disk 2 to place the first disk 2 on the lower surface side of the holder 4. To guide you to

Here, a first disk 2, a second disk 1, a ring-shaped magnet 3, and an opening 4 formed in the holder 4.
The relationship between the sizes will be described with reference to FIG. The second outside diameter d ₃ of the disc 1 is larger than the inner diameter d ₂ of the innermost protrusion 4c of the opening 4a, smaller than the diameter d ₅ of the base portion of the projecting portion 4c. Further, the outer diameter d of the first disk 2
₄ is larger than the outer diameter d _{3 of} the second disc 1 and the protrusion 4
the outer diameter of c d ₅ smaller. The outside diameter d ₁ of the ring-shaped magnet 3 is smaller than the inner diameter d ₂ of the projection 4c.

FIGS. 5A and 5B and FIGS. 6A and 6A show a state in which the chucking member 5 having the above-described structure is attached to the opening 4a of the holder provided in the disc player. ), (B) and (c). In addition,
Chucking member 5 of chucking device according to the present invention
Prior to attachment to the holder 4, a ring-shaped magnet 3 and first and second disks 2, 1 disposed on both upper and lower ends of the magnet 3 are assembled and integrated in advance.

To attach the chucking member 5 to the opening 4a of the holder 4, first, as shown in FIG. The first disk 2 is placed on the portion 4c, and the lower surface of the first disk 2 is brought into contact with the upper surface of the protrusion 4c as shown in FIG. It rotates in the direction of arrow B. Then, as shown in FIG. 6A showing the lower surface side of the opening 4a of the holder 4, the tongue piece 2 of the chucking member 5
The inclined surface 2a provided on the projection 4b of the opening 4a comes into contact with the inclined surface 4d of the introduction portion 4b of the introduction portion 4b. When the chucking member 5 is further turned in the direction of arrow B in FIG. 6A, the first disk 2 is elastically deformed because it is formed using an elastic material such as a synthetic resin. As shown in b), the inclined surface 2a is guided by the introduction portion inclined surface 4d of the introduction portion 4b, and the tongue piece 2b comes under the lower surface side of the protrusion 4c. When the chucking member 5 is further turned in the direction of arrow B in FIG. 6B, each tongue piece 2b of the first disk 2 is completely guided to the lower surface side of the holder 4 through the opening 4a. The chucking member 5 can be rotatably attached to the holder 4, and the chucking member 5 is prevented from coming off.

The above-described example mainly shows a state in which the chucking member 5 is attached to the holder 4 using an automatic assembling machine. The attachment of the chucking member 5 to the holder 4 is performed manually. Is also possible. next,
A state where the chucking member 5 is attached to the opening 4a of the holder 4 mainly by hand will be described with reference to FIGS. 7 (a), 7 (b) and 7 (c). FIG. 7 also shows the holder 4 viewed from the lower surface side.

[0024] In FIG. 7, the chucking member and the second disc three tongues are provided at two of the 5, respectively 2b _{1, 2b} 2, 2b _{3, 1} Each tongue 2b, 2b _2, The inclined surfaces provided at 2b ₃ are designated as 2a _1, 2a _2, 2a ₃ , respectively, and the three projections provided at the opening 4a of the holder 4 are designated as 4c _1, 4c _2, 4c ₃ , respectively. each protrusion 4c _1, 4c _2, 4c ₃ introducing portion provided to each _{4b 1, 4b 2, 4b 3} , 4d 1 the introduction section inclined surface provided on respective introduction portion, 4d _2, 4d _{Assume 3} .

The chucking member 5 is connected to the opening 4 of the holder 4.
In order to manually attach to (a), first, (a) of FIG.
As shown in, chat one of King member first disc 2 into three tongues are provided of 5, for example 2b ₁ on the lower surface side of the protrusion 4c ₁ Insert obliquely into the opening 4a Face. In this state, the chucking member 5 is removed as shown in FIG.
When rotated in the direction of the arrow shown in the introduction portion 4 of the protrusion 4c ₁
b introducing portion inclined surfaces 4d ₁ provided _one tongue piece 2b ₂
Inclined surfaces 2a ₂ and engaged relative engagement of the tongue 2b ₂ is guided introduced into the opening 4a as shown in (b) of FIG. Moreover, chat turn the king member 5 in the direction of the arrow shown in FIG. 7 (b), the introduction portion inclined surface 4d ₁ is tongue 2b ₃ inclined surface 2
a ₃ and engaged relative engagement, tongue 2b as shown in FIG. 7 (c)
₃ is guided into the opening 4a. Thereby, the first
All the three tongue pieces provided on the disc 2 can be guided and introduced into the opening 4a, the chucking member 5 can be rotatably mounted, and the chucking member 5 can be prevented from coming off. it can.

As is apparent from the above description, the first disk 2 constituting the chucking member 5 has, for example, an outwardly protruding inclined surface on one side in the circumferential direction of the first disk 2. For example, three tongue pieces 2b provided with 2a are provided.
An introduction portion 4b is formed in the opening 4a of the holder 4 so as to protrude inward of the opening 4a and to engage with the inclined surface 2a to guide the first disk 2 to the lower surface side of the holder 4. By providing the projected portion 4c, the chucking member 5 can be attached to the holder 4 by a simple operation.

Here, when attaching the chucking member 5 to the holder 4, there is no need to insert the chucking member 5 obliquely, and the chucking member 5 is pressed against the holder 4 in the rotation axis direction. Just turn and assemble,
The assembly process can be simplified, making it suitable for automation.

Further, once the opening 4a chucking member 5 is introduced, the second diameter d ₄ outermost the outermost diameter d ₃ and the disk 2 of the disk 1 as described above , Opening 4a
Larger than the inner diameter d ₂ of the projection 4c provided on the chucking member 5 is not come off from the holder 4. The direction in which the chucking member 5 is incorporated into the opening 4a is the direction of the rotation axis (the direction of arrow A in FIG. 2), and a notch for fitting the chucking member radially into the opening of the holder as in the related art. It is not necessary to provide
The strength of the holder 4 can be maintained.

The number of the tongue pieces 2b and the protrusions 4c provided in the first disk 2 and the opening 4a is not limited to the above example, but may be, for example, two or four or more. Is also good. In the chucking device according to the present invention, similarly to the above-described conventional chucking device, when the disk rotation operating mechanism disposed on the player body is raised, the chucking member 5 is magnetically attracted to the disk table, and The disk 71 placed on the disk 72 is sandwiched together with the disk table 72 so as to be rotatable integrally with the disk table 72.

[0030]

As described above, in the chucking device according to the present invention, a plurality of tongue pieces each having an inclined surface are provided on one of the disk portions located at the lower end of the cylindrical portion constituting the chucking member. In the opening of the holder to which the chucking member is attached, protrudes inward of the opening, and engages with the inclined surface of one of the discs so that one of the discs faces the lower surface of the holder. Since a plurality of protrusions having an introduction portion for guiding are provided, when attaching the chucking member to the holder, one of the disk portions disposed on the lower end side of the chucking member is placed on the protrusion in the opening. Since the mounting is performed only by performing the rotation operation, the mounting operation becomes extremely easy. Then, the chucking member can be automatically attached to the holder.

Further, since the opening to which the chucking member is attached is closed, reliable attachment of the chucking member to the holder is ensured, the strength of the holder can be sufficiently maintained, and durability is improved. A chucking device can be configured.

[Brief description of the drawings]

FIG. 1 is a sectional view of a chucking device according to the present invention.

FIG. 2 is an exploded perspective view of the chucking device.

FIG. 3 is an enlarged sectional view showing a main part of the chucking device.

FIG. 4 is a schematic plan view for explaining the size relationship between the diameters of the opening of the chucking member and the holder constituting the present invention.

FIG. 5 is a perspective view showing a state where a chucking member is attached to a holder.

FIG. 6 is a bottom view showing a state in which a chucking member is attached to a holder in the order of steps.

FIG. 7 is a bottom view showing another example of a state in which the chucking member is attached to the holder.

FIG. 8 is a partially cutaway perspective view showing an attached state of a conventional chucking device.

FIG. 9 is an exploded perspective view showing a conventional chucking device.

FIG. 10 is a schematic perspective view showing a main part of another conventional chucking device.

[Explanation of symbols]

1 second disk, 2 first disk, 2a inclined surface,
2b tongue, 3 ring-shaped magnet, 4 holder,
4a opening, 4b introduction, 4c projection, 4d
Introductory slope, 5 chucking members,

Claims (1)

(57) [Claims] A cylindrical portion, and a pair of disk portions having an outer diameter larger than an outer diameter of the cylindrical portion provided on an upper end side and a lower end side of the cylindrical portion, respectively, for holding a disk together with a disk table. A chucking member, and an opening through which the columnar portion is inserted;
A holder on which the chucking member is rotatably attached by passing the cylindrical portion through the cylindrical portion, and a holder provided on one of the disk portions located at the lower end side of the cylindrical portion.
A plurality of tongue pieces each having an inclined surface, and provided on the inner peripheral side of the opening , and having a diameter larger than the diameter of the column.
Projecting inward of the opening so as to have a
A plurality of protruding portions projecting out, and the one disc portion is relatively engaged with the inclined surface of the tongue piece portion.
Provided on the plurality of protrusions so as to guide to the lower surface side of the holder
The tongue piece and a vignetting introduction part, the chucking member in a state where the circular plate portion of the one described above is placed substantially horizontally on the plurality of protrusions by pivoting relative to the holder The inclined surface and the introduction portion are relatively engaged with each other, and in this state, the chucking member is further rotated to move the inclined surface to a lower side of the protruding portion along the introduction portion, and further chucking is performed. A chucking device in which the engagement between the tongue piece and the protrusion is released by the rotation of the king member, and the chucking member is rotatably attached to the holder.