JPH0580744B2 - - Google Patents

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to a recording medium clamping device, particularly for clamping a recording medium to a rotating spindle in a recording or reproducing apparatus using a rotating recording medium such as a magnetic disk. Regarding a clamp device for.

[Conventional technology]

As a conventional typical example of the above-mentioned clamp device, the one shown in FIGS. 4A and 4B is well known.

In the figure, 1 is a base which is the base of a magnetic disk recording or reproducing device, 2 is a spindle for rotationally driving a flexible magnetic disk 10 which is a recording medium, and 3 is a base 1 in which the magnetic disk 10 is stored. 4 is a center cone which is a clamping means for positioning and clamping the magnetic disk 10 at its center with respect to the spindle 2; 5 is a tip thereof; a center cone support plate near 5a that rotatably supports the center cone 4 around its rotating shaft 4a; a cam 6 abutting from above near the base 5b of the plate 5 to swing the plate 5 downward; 7 is a shaft that connects the cam 6 to an operating lever (not shown); 8 is a leaf spring that supports the plate 5 at its base 5b and provides restoring force for upward swinging;
9 is a mounting screw for fixing the leaf spring 8 to the base 1.

Note that FIG. 4A shows the state in which the magnetic disk 10 is not clamped, and FIG. 4B shows the state in which the magnetic disk 10 is not clamped.
This shows a state in which 0 is clamped.

With the above configuration, first, in the unclamped state shown in FIG. It enters the central opening of the magnetic disk 10 and the recess 2a of the spindle 2 while drawing an arcuate trajectory, and positions and clamps the magnetic disk 10. The clamping operation is completed when the cam 6 has rotated approximately 90 degrees, resulting in a state as shown in FIG. 4B.

[Problem that the invention seeks to solve]

By the way, in the above-mentioned configuration, the plate 5 is supported at one end by the leaf spring 8, and when the magnetic disk 10 is not clamped in order to perform an arcuate movement, that is, in the state shown in FIG. 4A, The tip 5a is located at a very high position, which affects the overall thickness of the recording or reproducing device and hinders its reduction in thickness.

In view of such conventional disadvantages, the present applicant has proposed a clamping means for clamping a rotating recording medium to a rotating spindle at its center, and a clamping means rotatably supported and at least partially By providing a clamp operating means having a neck bending mechanism and a regulating means that restricts the clamp operating means to a neck bending state when the clamp means is in an unclamped state, the recording device can greatly contribute to making the recording or reproducing device thinner. A media clamping device was previously proposed in Japanese Patent Application No. 162374/1983.

Briefly, the present invention relates to a further improvement of the previous proposal, and is a novel recording medium that can greatly contribute to making the recording or reproducing device thinner and that can clamp the recording medium stably and well. It is an object of the present invention to provide a media clamping device.

[Means for solving problems]

In order to achieve the above object, the apparatus of the present invention includes a clamping means for clamping a rotating recording medium to a rotating spindle at a center thereof, a clamping means rotatably supported, and at least partially a supporting means having a hinge part capable of bending the neck; a regulating means for regulating the supporting means to a folding state when the clamping means is in an unclamped state; and a regulating means for pressing the supporting means to release the regulation by the regulating means. It also includes pressing means for pressing the clamping means against the rotating spindle to perform clamping.

Further, according to the apparatus of the present invention, there is provided a clamping means for clamping the rotating recording medium inserted into the apparatus main body with respect to the rotating spindle at the center thereof, and the clamping means is rotatably supported and at least partially a supporting means having a hinge portion capable of bending the neck; a regulating means for regulating the supporting means to a bent state when the clamping means is in an unclamped state; is formed with a plurality of engaging portions that can engage with the supporting member, and the sliding action of the engaging portion presses the supporting means via the engaging portions to release the restriction by the restricting means and at the same time, the clamping means is and a slide member for pressing against the rotating spindle to perform clamping.

Further, according to the device of the present invention, a plurality of engaging portions that can be engaged with the supporting member are formed on the sliding member at least at two points in the front and back in the sliding direction.

[Effect]

In the above, the supporting means is bent by the regulating means when the clamping means is not clamped, so that the operating space occupied by the supporting means is reduced accordingly.

Further, when clamping, at least two points on the front and rear of the support means are pressed, so that the operation is performed stably and favorably.

In addition, since the support member is controlled by the slide member, the device can be made thinner.

〔Example〕

Hereinafter, preferred embodiments of the present invention will be described with reference to FIGS. 1A-C, 2, and 3A-C. In addition, in these figures, elements indicated by the same reference numerals as in FIGS. 4A and 4B have substantially the same configuration and function, and these elements should not be used as a hindrance to understanding the present embodiment. I will omit the explanation to the extent that it is unnecessary.

As shown in FIGS. 1A to 2C and FIG.
and second plates 11 and 12, and these plates 11 and 12 have step-like arms 11b and 12a at their tail ends and tips, respectively, and as shown in detail in FIG. , these arms 11b and 12a are combined differently. At this joint, the two plates are connected by a hinge spring 12', and the first plate 11 can be bent downward relative to the second plate 12 at this joint. That is, the neck bending mechanism is configured in the matching portion. Since the hinge spring 12' is formed into a plate shape, in its natural state, the first
The arm portion 11b of the plate 11 and the second plate 1
The second arm portion 12a is connected to the second and first plate 1, respectively.
2 and 11, and when viewed from the side, it forms a straight line. Note that the hinge spring 12' has the first and second hinge springs.
It is screwed to each of the plates 11 and 12.

The first plate 11 has stepped ears 11c on both sides thereof for receiving a pressure roller, which will be described later, and the end on the roller entry side has a downwardly tapered part 11d for smooth entry of the roller. It's summery. On the other hand, the second plate 12 has a raised part 12c in its center for receiving a pressing roller (to be described later), and the end on the roller entry side similarly has a downwardly tapered part for smooth entry of the roller. 12
d.

Returning to FIGS. 1A to 1C, the center cone 4 serving as the clamping means is rotatably supported approximately at the center of the first plate 11 at its rotation axis 4a, while the second plate 12 is rotatably supported at its base. 12
It is attached to the leaf spring 8 at b, and is given an upward swinging return force. Also, a portion of the top plate 3 is bent upward, such that the center cone 4 is spaced apart from the spindle 2 to provide a space between them to allow free insertion of the jacket 10'. In the first plate 1
An engaging portion 3a is provided as a restricting means for engaging the tip 11a of the first plate 11 from above and bending the first plate 11 relative to the second plate 12. Incidentally, the above-mentioned cam 6 is connected to the second plate 1.
Appropriate location on the top surface of 2 (approximately the center position in the figure)
It is designed to act on the

13 and 14 are the aforementioned first and second plates 1;
1 and 12, the first roller 13 pushes the second plate 12 through its protrusion 12c, and the second roller 14
are provided as a pair, and each presses the first plate 11 downward through the ears 11c on both sides thereof, thereby causing the center cone 4 to clamp the magnetic disk 10 to the spindle 2. Note that details of the pressing mechanism will be described later.

Other than the above, the configuration is the same as that of the conventional example explained in FIGS. 4A and 4B.

The operation of the apparatus having the above structure will now be explained with reference to FIGS. 1A to 1C.

1A shows a non-clamped state, FIG. 1B shows a state in the middle of clamping, and FIG. 1C shows a state in which clamping is completed.

First, in the unclamped state, the second plate 12 is lifted upward by the leaf spring 8, as shown in FIG. 1A. In this state, the first plate 11 connected by the hinge spring 13 is also lifted upward, but its tip 11a comes into contact with the locking part 3a formed on the upper plate 3, and the highest position is restricted. For second plate 1
2, the hinge spring 13 is bent, that is, the neck is bent. The height position of the locking part 3a is set so that the first plate and the center cone 4 are almost horizontal in this position, and in this case,
The first plate 11 is urged upward by the hinge spring 12'.

After loading the magnetic disk jacket 10' in this state, the pressing mechanism, which will be described later, is operated to horizontally move the pressing rollers 13 and 14 in the direction of the arrow in the figure. Here, the distance between rollers 13 and 14 is the second
The distance between the raised portion 12c of the plate 12 and the ear portion 11c of the first plate 11 is set shorter than the distance between the second roller 14 and the ear portion 11c of the first plate 11. Also before the first
The roller 13 of the second plate 12
It reaches the roller entry side taper portion 12d of c, and presses the second plate 12 downward against the leaf spring 8. At this time, an upward biasing force is applied to the first plate 11 until the hinge spring 12' becomes in a straight line, so that the tip 11a and the locking portion 3a are such that the first plate 11 is connected to the second plate. 12 until it is in a straight line (the state shown in FIG. 1B).

Then, when the roller 13 moves until it rides on the raised portion 12c of the second plate 12 as shown by 13' in FIG. The center cone 4 is connected to the magnetic disk 10.
and into the central opening of the spindle 2 and the recess 2a of the spindle 2.

Furthermore, while the first roller 13 is moved from the position shown by 13' to the position shown by the solid line in FIG. 1C, the second roller 14 is also moved from the position shown by 14' to the position shown by the solid line, At this time, the second roller 14 rides on the ear portion 11c of the first plate 11 through its roller entry side taper portion 11d, and applies a required clamping force to the center cone 4 through the first plate 11. In this way, the clamping of the magnetic disk 10 is completed, and as shown in FIG.
The state shown in is reached.

Next, the pressing mechanism will be explained with reference to FIGS. 3A to 3C.

In the figure, reference numeral 15 denotes a slide lever, which is engaged with a pin 16 set in the upper plate 3 in its elongated hole 15a, so that it can slide up and down in Figure 3A. An operation knob 17 is attached to a part. The left extending arm of the slide lever 15 is bent as shown in FIG.
A support frame portion 15b for the roller 13 is formed. That is, the roller shaft 18 is attached so as to cross the frame portion 15b, and the first roller 13 is rotatably attached to the roller shaft 18 between the lower bent portions 15c provided on the frame portion 15b. Moreover, a portion thereof is exposed from the opening 15e. Further, a pair of lifting prevention rollers 19 are rotatably mounted on the roller shaft 18 with the first roller 13 interposed therebetween. Here, one of the rollers 19 is disposed outside the frame portion 15b, and the other is disposed between a pair of downwardly bent portions 15d provided on the frame portion 15b, and a portion thereof is exposed through the opening 15f. These rollers 19 come into contact with the lower surface of the regulating portion 24a of the regulating frame 24 fixed on the upper plate 3 with screws 25, thereby causing the leaf spring 8 to act through the second plate 12 and the first roller 13. The floating of the frame portion 15b due to the spring force is restricted.

20 is rotatably attached to the roller shaft 18 at its tail fork portion 20a.
The second roller 14 is rotatably mounted together with the anti-float roller 23 by roller shafts implanted in the front fork portion 20b of the frame 20, respectively. The roller 23 is separated from the roller 14, and restricts the floating of the frame 20 by coming into contact with the lower surface of the restriction portion 24b of the aforementioned restriction frame 24. Note that the frame 20 has a roller shaft 18
The coil spring 21 wound around the frame part 1
5b, it is urged to rotate upward in the plane of FIG. 3A.

In the above configuration, FIGS. 3A to 3C show a state in which clamping is completed (corresponding to FIG. 1C).
That is, when the operating knob 17 is pushed in the direction of the arrow to perform clamping, the slide lever 15 moves as shown in FIG. 3A.
At this time, first the first roller 1
3 rides on the raised portion 12c of the second plate 12 through its tapered portion 12d. In this case, the leaf spring 8 acting on the second plate 12
The first roller 13 is urged upward by the force, but on the other hand, since the roller 19 is in contact with the lower surface of the regulating portion 24a of the regulating frame 24, the second roller 13 is urged upwardly against the leaf spring 8. Push down the plate 12 (state shown in FIG. 1B). and the first roller 13
When the roller completely rides on the raised portion 12c of the second plate 12, the state shown in FIG.
14'). When the operating knob 17 is pushed further in this state, the first roller 13 rolls on the raised portion 12c of the second plate 12, while the second roller 14 moves between the roller 23 and the regulation frame 24. The first plate 11 rides on the ear part 11c of the first plate 11 through the tapered part 11d in a state where its floating is restricted by contact with the lower surface of the regulating part 24b, and as a result, the first plate 11
When the slide lever 15 reaches a position approximately corresponding to the diameter line of the center cone 4 through the
is latched by means not shown, and as shown in FIG.
(The positions of the rollers 13 and 14 at this time are the positions indicated by solid lines in FIG. 1C).

One embodiment of the present invention is as described above, but as can be understood from the comparison with the conventional example shown in FIGS. The required operation space for the support plate (especially in the height direction) is reduced with an extremely simple structure that consists of dividing the support plate into 12 parts, connecting both parts with a hinge spring 12', and providing a locking part for regulating the rising height. Therefore, it can greatly contribute to making the entire recording or reproducing device thinner.
Furthermore, since the center cone 4 is pressed near the center cone 4, a stable and appropriate clamping force can be obtained.

In the embodiment, the neck bending mechanism is provided at one location on the support means, but it may be provided at multiple locations if necessary.

Further, instead of using the two-step pressing by the first and second rollers 13 and 14 as in the embodiment, clamping is performed only by pressing the first plate 11 by the second roller 14. Also good. In this case, the frame 20 may be fixed to a part of the slide lever 15. Of course, the first roller 13 and related members become unnecessary.

Further, in the embodiment, the final reaching position of the second roller 14 is set to a position approximately corresponding to the diameter line of the center cone 4, but the center cone support portion is such that a stable and appropriate clamping force of the center cone 4 can be obtained. The pressing position of the roller 14 is not limited to this as long as it is in the vicinity of .

Incidentally, in the embodiment, the first roller 13 and its floating prevention roller 19, and the second roller 14 and its floating prevention roller 23 are provided separately from each other. In consideration of the fact that the clamps roll in opposite directions when clamping and unclamping, they are separated from each other rather than integrated to facilitate operation.

The locking part 3a for the first plate 11 in the unclamped state shown in FIG. 1A is provided on a part of the regulation frame 24 as shown at 24c in FIG. 3A instead of being provided on a part of the upper plate 3. It may be made to extend above the first plate 11 and serve as a locking portion.

Incidentally, as an example, an example in which the present invention is applied to a magnetic disk recording or reproducing device is shown.
The present invention can also be applied to, for example, optical disc recording or reproducing devices.

〔Effect of the invention〕

As detailed above, according to the present invention, the operating space occupied by the support means of the clamp means can be reduced with a simple configuration, and the overall thickness of the recording or reproducing apparatus can be made thinner. At the same time, it is possible to ensure a stable and appropriate clamping force of the clamping means, which is extremely useful in this type of recording or reproducing apparatus.

[Brief explanation of drawings]

Figures 1A, B, and C are side views of an embodiment of the present invention in each state. Figure 1A shows the unclamped state, Figure 1B shows the clamped state, and Figure 1C shows the clamped state. Indicates clamp completion status. Figure 2 is Figure 1 A, B, C
Figures 3A, B, and C are perspective views showing how the first and second plates are connected, Figure 3A is a top view, and Figure 3B is a perspective view of the pressing mechanism. BB sectional view in Figure 3A, Figure 3C is Figure 3A
FIG. 4A and 4B are side views of the conventional example in each state, with FIG. 4A showing the non-clamped state and FIG. 4B showing the clamped state. 2... Rotating spindle, 3... Upper plate, 3a... Locking part, 4... Center cone, 6... Cam, 8... Leaf spring, 10... Magnetic disk, 11... First plate, 12... Second plate, 12 ′...hinge spring,
DESCRIPTION OF SYMBOLS 13...First pressure roller, 14...Second pressure roller, 15...Slide lever, 18, 22...Roller shaft, 19, 23...Floating prevention roller, 20...Roller support frame, 21...Coil spring, 24... regulatory frame.

Claims (1)

[Scope of Claims] 1. Clamping means for clamping a rotating recording medium to a rotating spindle at its center, the clamping means being rotatably supported, and
a supporting means having at least a portion of a hinge portion capable of bending the neck; a regulating means for regulating the supporting means to a folding state when the clamping means is in an unclamped state; and a regulating means for pressing the supporting means so that the regulating means A recording medium clamping device comprising: pressing means for releasing the restriction and pressing the clamping means against a rotating spindle to perform clamping. 2. Clamping means for clamping the rotating recording medium inserted into the apparatus main body to the rotating spindle at the center thereof, and rotatably supporting the clamping means, and
a supporting means having a hinge portion capable of bending the neck in at least a portion thereof; a regulating means regulating the supporting means to a bending state when the clamping means is in an unclamped state; and sliding in parallel to the insertion direction of the rotary recording medium. a plurality of engaging portions that are arranged so as to be engageable with the supporting member, and the sliding action of the engaging portions presses the supporting means via the engaging portions, releases the restriction by the restricting means, and releases the clamping member. A recording medium clamping device comprising: a slide member for pressing means against the rotating spindle to perform clamping. 3. A clamping means for clamping the rotating recording medium inserted into the apparatus main body with respect to the rotating spindle at the center thereof, the clamping means being rotatably supported, and
a supporting means having a hinge portion capable of bending the neck in at least a portion thereof; a regulating means regulating the supporting means to a bending state when the clamping means is in an unclamped state; and sliding in parallel to the insertion direction of the rotary recording medium. A plurality of engaging portions that are arranged so as to be able to engage with the support member are formed at least at two points in the front and back of the sliding direction, and the sliding operation causes the supporting means to be moved at the two points in the sliding direction via the engaging portions. A recording medium clamping device comprising: a slide member for pressing, releasing the restriction by the restriction means, and pressing the clamping means against the rotating spindle to perform clamping. 4. In claim 3, the slide member has roller members disposed at each of the two engagement portions, and when the slide member presses the support member, the roller portions at the two points are different from each other. A recording medium clamping device characterized in that the device is configured to press the support member at a timing.