JPH0212650A - Recording or reproducing device - Google Patents

Abstract

PURPOSE:To prevent the projection of a shutter closing member toward a holder side in the case of engagement with a jacket by fixing one end of an elastic member closing a shutter to a holder, forming an engagement part of the shutter to a free end and regulating it with an engagement part of the holder. CONSTITUTION:A shutter closing member 34 arranged in the holder is made of an elastic member, one end is fixed and a free end side formed with an engagement part 4a engaged with a shutter 4 is regulated by an engagement part 34a formed with the holder to simplify the constitution. Moreover, even if the shutter closing member 34 rides on a jacket 1 in the insertion of the jacket 1, the member is not projected to the holder side direction, danger of defect is less and miniaturization is attained even in terms of space.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Application of Soil Collection The present invention relates to a shutter closing device for a recording medium in a recording or reproducing apparatus.

(Prior Art) Conventionally, various devices have been proposed for recording and reproducing signals on a recording medium, depending on the type of the recording medium.

For example, a recording medium used in a so-called still video camera that records and plays back video signals, audio signals, data signals, etc. on a magnetic disk is such that the magnetic disk is housed in a jacket and the magnetic disk is inserted through an opening formed in the jacket. ,
A stabilizing plate is inserted to stabilize the magnetic head and head touch, and recording and playback are performed on the magnetic disk. A shutter is disposed at the opening of the jacket so that it can be opened and closed to protect the disc inside from dirt, scratches, etc.

Therefore, in an apparatus using this recording medium, the shutter is configured to open in response to the operation of inserting the recording medium into the loading holder, and close the shutter in response to the operation of ejecting the recording medium from the holder. has been done.

Specifically, on the inner surface facing the shutter inside the holder,
an opening member that engages with the shutter when the jacket is inserted and opens the shutter in response to the insertion operation; and an opening member that engages with the shutter in the loading position of the jacket and closes the shutter in response to the ejection operation of the jacket. There is.

In addition, normally the shutter release member may be a simple protrusion, but
When the jacket is inserted, the shirt shutter closing member rides on the jacket and the shutter, and after passing a predetermined distance, it is locked to the engaging part of the shutter, so that it is biased against the shutter. , and must be movable relative to the shutter.

(Problems to be Solved by the Invention) However, according to the above-mentioned device, regardless of whether the shirt closure member is a lever-like member or an elastic member such as a leaf spring, when the jacket is inserted, , before reaching the locking part of the shutter, the shutter closing member rides on the jacket and protrudes to the side of the holder, impeding the movement of the holder and interfering with other members, thus reducing the space of the holder and its surroundings. need extra.

In addition, since both the holder and the shutter are small, the shutter closing member must be extremely small to be used, and its elastic force cannot be strong, which often causes malfunctions such as incomplete closing of the shutter. was occurring.

(Means for Solving the Problems) The present invention has been made for the purpose of solving the above-mentioned problems, and is characterized by having a shutter that can be opened and closed freely in the opening that exposes the recording medium. A recording or reproducing apparatus using a cassette, comprising an elastic member that closes the shutter by an operation of ejecting a stored cassette from a holder that holds the cassette, the elastic member having one end fixed to the holder. and an engaging part that engages with the shutter is formed on the free end side, and the J end side is regulated by an engaging part provided on the holder, thereby preventing engagement with the jacket. This prevents the shirt closure member from protruding to the side of the holder when mating, and also allows a strong engagement force to be obtained even with a small elastic member.

(Example) The recording or reproducing apparatus of the present invention will be explained below with reference to the respective figures.

FIG. 13 is a perspective view showing an example of a jacket in which a recording medium used in the apparatus of the present invention can be placed.

In the figure, 1 is a jacket containing a recording medium;
A magnetic disk 2 as a recording medium is rotatably housed inside the disk. The center of the magnetic disk 2 is molded with synthetic resin and has an engagement hole 3 for a spindle for rotating the disk.
A center core 3 having a shape a is attached and exposed through a central hole bored in the upper and lower surfaces of the jacket. Further, on the lower surface of the center core 3, a magnetic plate 3a is arranged which is magnetically attracted to a magnet arranged on a spindle, which will be described later. Further, as shown in FIG. 11, the magnetic plate 3a is integrally bent with a protrusion 3b that passes through the center core 3 and is exposed to the upper surface. A rotational phase display member (hereinafter referred to as PG pin) 3b is formed to guide the magnetic flux of the magnet to the upper surface of the center core and to indicate the rotational phase of the disk.

la and lb are disc exposure openings formed at mutually opposing positions on the upper and lower surfaces of the jacket 1, respectively;
A record, which will be described later, is recorded from the lower surface side opening 1b.

A stabilizing plate (described later) for stabilizing the contact state between the magnetic disk 2 and the magnetic head can be inserted into the reproduction magnetic head from the upper opening 1a. A shutter 4 for opening and closing these openings is arranged in the openings 1a and lb so as to be slidable in the direction of the arrow. 4a is an engagement hole for engaging with a shutter closing mechanism described later when the shutter 4 is closed.

Further, reference numeral 5 denotes a locking member for locking the shutter 4 in the closed position, and although the details are omitted, a part of it is exposed on the side surface of the jacket where the shutter 4 is arranged, and as will be described later, when the jacket is inserted. The lock is released by operating a release member on the jacket holder side.

lc and ld are positioning holes drilled at predetermined locations near the side edges of the jacket 1, and are used to position the loading position when the jacket 1 is loaded into a jacket mounting section (described later); le is a positioning hole on the bottom surface of the jacket 1; This is an operation piece installed to prevent erroneous recording.

Next, the configuration of the apparatus of the present invention will be explained in order with reference to each figure. As a procedure for explanation, first an outline of the entire device will be explained, and then individual mechanisms will be explained in detail.

FIG. 1 is an exploded perspective view showing the basic structure of the jacket loading mechanism in the apparatus of the present invention.

Reference numeral 10 denotes a chassis of the main body of the recording or reproducing apparatus, which is molded with high precision by die-casting or the like, and includes a spindle 12 for rotating a disk, and a spindle motor 11 for rotationally driving the spindle 12. A magnetic head 13 that is inserted through the lower side opening 1b of the loaded jacket 1 and performs recording and reproduction by contacting the magnetic disk 2, a transport mechanism (not shown) for the magnetic head 13, and a positioning mechanism for accurately positioning the jacket at the loading position. Posts 14a, 14b, 14c, etc. are arranged to constitute a jacket mounting section. Each positioning post receives the bottom surface of the jacket when it is loaded and positions the jacket in the height direction, and the positioning post 1
4a and 14b are positioning holes 1c of the jacket.

Projections 141a and 141b are formed to be inserted into the ld so that positioning in the horizontal direction can be performed simultaneously. Note that the positioning post 14a is also used for positioning a stabilizer plate, which will be described later.

Further, at a predetermined location on the upper surface of the peripheral portion of the main body chassis 10, there is a projection 10d for positioning the mounting position of a frame 20 that supports a jacket loading mechanism unit, which will be described later.
a screw hole 10a for screwing to the and mounting position
, 10b, and 10c are respectively formed, and a protrusion 10 that comes into contact with a support plate 42 that supports a stabilizing plate 41 to be described later to regulate its position in the height direction.
f, log, and loh are formed.

The supporting plate of the stabilizing plate is inserted through the opening 1a of the jacket l loaded in the jacket loading section and positioned in the height direction of the operating position where it comes into contact with the magnetic disk 2 using the above-mentioned protrusions 10g and 10h. The horizontal position is determined by the post 14a and the protrusion 10.
They are respectively positioned by f. Details will be described later.

20 is a holder 30, which will be described later, on the device main body chassis lo.
．． This is a frame for assembling a jacket loading mechanism consisting of a lid body 40.

This frame 20 has a front plate 20a and a right side plate 20b, which are formed by bending a relatively low-rigid metal plate into a substantially U-shape.

It consists of the left side plate 20c, and the bent pieces 2Qe and 20f formed at the ends of both sides of the left side plate 20c are attached to the main body chassis l.

The bent pieces 20d, which are positioned on the upper protrusions 10d and foe, respectively, are screwed into the screw holes 10b and 10c of the same chassis with screws 15, and are bent and formed inside the front plate 20a.

By being screwed into the upper screw hole 10a with the screw 15, it is fixed on the apparatus main body chassis 10 with support at three points including two points near the hinge.

In other words, if the device main body chassis 10 is formed with high precision by die-casting or the like, the position of the frame 2o can be accurately determined by the above-mentioned three-point support structure, and the metal that forms this also needs to have high rigidity, precision, and strength. I don't. On the other hand, by forming the frame 20 from a thin, flexible metal plate with low rigidity, it is easy to form the frame 20, and it is easy to form the frame 20 by positioning the frame 20 at the time of installation.
Even if stress is generated due to screwing, etc., it can be absorbed by the frame 20, and the attachment to the apparatus main body chassis 10 will not cause deterioration in precision or deformation due to distortion or unnecessary external force.

The frame 20 has ends of both side plates and bent pieces 20f.
By inserting the support shaft 21 into the holes drilled in each of the projections 20g, 20h, and 20i formed at the tip,
A hinge portion 22 is configured to rotatably support a jacket holder 30 and a lid body 40, which will be described later. Moreover, since the free end of the frame 20 is connected by the support shaft 21, even if the frame 20 has low rigidity and is made of weak metal, the hinge part for supporting the jacket loading mechanism has sufficient strength. and accuracy can be ensured. By using this approximately U-shaped frame 20 and attaching it with three-point support, it is no longer necessary to provide a top plate, whereas in conventional devices each side plate was installed separately or in series via a top plate. Since there are no holes, there are fewer processing steps, which makes it possible to make the product thinner and easier to assemble.Furthermore, since the side surfaces in three directions can be molded and attached at once, the positions between each surface can be determined easily.

Further, a control lever 23 for controlling a disk pressing member 36 that presses a center core, which will be described later, is rotatably attached to the left side plate 20c of the frame 20 by a shaft 24, and is always biased clockwise by a spring 25. Protrusion 2
0I! Its rotational position is regulated by

Also, on the inside of the front plate is a lock lever 27, which will be described later.
A lock lever 28 and the like for locking the lid 40 and the holder 30 in the closed position are provided, and these will be described later.

Further, 20j engages with an engaging arm 40c of the lid 40, which will be described later, and the lid 40. A protrusion is provided for determining the open position of the holder 30, and a protrusion 20 is provided for regulating the closed position of the holder 30.

Reference numeral 30 denotes a jacket holder that holds the jacket l inserted from the outside and transfers it to the jacket loading position on the main body chassis 10 of the apparatus. A guide portion/holding portion 30a for holding the.

30b is formed.

The holder 30 has a hinge protrusion 30c formed on its rear edge.
, 30d is the support shaft 21 of the hinge portion 22 of the frame 20.
It is rotatably attached to the coil spring 31, and is biased in the normally open direction by a coil spring 31, that is, counterclockwise as seen in FIGS. 1 and 3, and as shown in FIG.
The hinge portion 30d is constantly pressed against the protruding piece 20h on one side of the frame 20 by the elastic force in the direction of the support shaft 21. This prevents the holder 30 from wobbling at the hinge part,
This is to improve the accuracy of the loading position of the jacket.

On the upper surface of the holder 30, a disk pressing member 36 (described later) is provided.
Openings 30e and 30f are formed through which various operating members such as the stabilizer plate 41 and the like can pass.

An elastic member (plate spring) 32 as a jacket discharge member is disposed at the rear inside the holder 30, and on the right side, when the jacket l is inserted into the holder 30, it engages with the shutter 4 to open it. A shutter opening member 33 and a shutter closing member 34 formed of an elastic member (a leaf spring) for closing the shutter 4 by the ejection operation of the jacket are arranged. Further, on the rear upper surface of the holder 30, there is an engagement hole 30k for locking the rearward pressing position of the jacket discharge member 32.
is formed.

At the center of the upper surface of the holder, a magnetic disk 2 is mounted on the spindle 12 and is rotated.
A phase detection member (PG coil) 3 for detecting the PG bin 3b on the center core 3 and detecting the rotational phase of the disk.
5 is placed. Further, in the opening 30F adjacent to the PG coil 35, there is a disk that presses the top surface of the center core 3 of the disk to forcibly fit it into the spindle when loading the disk into the jacket mounting section on the device main body chassis 10. The pressing member 36 has a substantially middle portion thereof attached to the protruding piece 30g on the holder 30.

The PG coil 35 is arranged rotatably around a shaft 37 supported by a shaft 30h, and a PG coil 35
．． A pressing portion 36a that escapes from the spindle 11 and presses onto the center core 3 of the disk is formed, and the other end is provided with an engaging piece 3 that engages with the control lever 23 on the side surface of the frame 20 described above.
6b is formed. In addition, 30i is a lid body 40 which will be described later.
As is clear from FIG. 2, the protrusion 30j for regulating the relative rotational position with respect to This is a protrusion that prevents the support shaft 37 from being pulled out.
is a relay board that relays a lead wire (not shown) when wiring the output of the PG coil to a servo circuit board (not shown) provided on the device main body side, and is connected to the holder on the other end side of the support shaft 37. The thickness of the support shaft 37 prevents the other end of the support shaft 37 from being pulled out.

As a result, it is possible to prevent the support shaft 37 from being removed by using the circuit board on the holder without caulking or attaching an E-ring to both ends of the support shaft 37, and the configuration can be greatly simplified. can.

Reference numeral 40 denotes a lid body disposed on the outside of the holder 30 so as to be openable and closable together with the holder 30.

The lid body 40 is rotatably attached to the support shaft 21 of the hinge 22 together with the holder 30 via supporting pieces 40a and 40b as hinge parts formed on the rear edge.
The holder 30 is always biased counterclockwise by a leaf spring 50a, which will be described later, and which is attached directly to the holder 30.
By locating the upper engagement portion 401C of the engagement arm 40c on the left side surface below the protrusion 30i on the side surface of the holder 30, the relative rotation range is restricted, and the lower engagement portion of the engagement arm 40c By positioning 402C below the protrusion 20j on the side surface of the frame, the lid body 40 is attached to the frame 20.
The open positions of both the holder 30 and the holder 30 are regulated.

Inside the lid 40, there is a stabilizing plate 41 that comes into contact with the magnetic disk 2 through the opening 30e on the top surface of the holder 30 when closed.
is supported via a support plate 42. and support plate 4
2 is attached so as to be vertically movable with respect to the lid 40 by means of the bins 44a, 44b on the front side of the lid 40 and an engaging protrusion 42c engaged in a hole 40d on the front surface of the lid, and is constantly held by a leaf spring 50b to be described later. It is pressed downward, that is, toward the device main body chassis 10 side.

Further, the support plate 42 includes a positioning projection 10g for positioning the boss 14a1 on the device main body chassis lO when the lid body 40 is closed;
Adjustable positioning bins 43a to 43c are disposed that abut on 10h to perform positioning in the height direction and positioning in the horizontal direction.

The detailed support structure of this stabilizer plate will be described later.

Further, a lock pawl 40 is formed on the front surface of the lid body 40 for engaging with a lock lever 28 arranged at the front part of the frame 20 to lock the lid body 40 and the collar 40 in the closed position. Engagement hole 30 of holder 30 inside upper plate near hinge 22
A release protrusion 40f for releasing the engagement between the cassette ejection member 32 of the holder 30 and the engagement hole 30j is formed at a position facing the holder 30.

Further, 40g is an engaging portion that engages with the control lever 23 when the lid body 40 is closed to release the pressing operation of the disc suppressing member, and 40h, 40i, and 40j are respectively provided with the holder 30. After assembling the lid body 40, the holes are provided through which screws and screwdrivers (not shown) can be inserted so that the fixing screws 15 between the frame 20 and the device chassis 10 can be attached and removed. There is no need to disassemble and remove the lid, holder, and frame separately when replacing the head (the jacket loading mechanism of the lid 40, holder 30, and frame 20 can be removed as a unit, improving serviceability and workability). Both are significantly improved.

According to the apparatus of the present invention configured as described above, the jacket 1 is inserted into the holder 30 in the direction of the arrow IN in an open state against the jacket discharge member 32.

After the jacket is stored in the holder 30, the holder 30 is loaded into the jacket loading position 1 on the chassis 10 by closing the lid 4 toward the device main chassis 10, and then closing the lid 40. Once completed, the device is locked in the closed position and the jacket is fully assembled.

Moreover, when taking out the jacket l, by releasing the lock of the cover body 4, the spring 31
．． The lid body 40 is opened and the jacket is discharged to the outside of the holder by the jacket discharge member 32.

The main structure of the apparatus of the present invention is as described above, and the detailed structure will be explained in detail below.

(1) Lid body 40. Regarding the opening/closing operation of the holder 30, the jacket ejection mechanism, and the shutter opening/closing mechanism, we will first explain the lid body 40. FIG. 2 shows the jacket discharging mechanism and shutter opening/closing mechanism that discharge the jacket l to the outside of the holder when the holder 30 is loaded with the jacket, and when the holder is opened.
This will be explained mainly using FIGS. 3 and 4.

FIG. 2 is a top view of the jacket loading mechanism unit viewed from above, and FIGS. 3(a) to 3(d) are side views in different operating states.

Lid body 40. In the open position where the holder 30 is opened and the jacket l can be attached and detached, the holder 30 is rotated counterclockwise as seen in the figure by the coil spring 31 disposed on the hinge 22, as shown in FIG. 3(a). The lid body 40 is disposed on the back surface thereof, and is further rotated counterclockwise with respect to the holder 30 by a leaf spring 50a that presses the upper surface of the holder 30 relatively. These open positions are shown in Figure 5 (a
), the gap between the lid 40 and the holder 30, that is, the rotation angle, is determined by the engagement between the upper engaging portion 401c of the engaging arm 40c of the lid 40 and the protrusion 30i of the holder 30. Further, the rotation angle of the lid body 40 with respect to the chassis 10 is restricted by the lower engaging portion 402C of the engaging arm 40c and the protrusion 20j. The open positions of the lid 40 and the holder 30 are determined by these interactions.

On the other hand, the jacket ejection member 32 disposed inside the holder 30 has one end fixed to the rear edge inside the holder 30, and the other end formed with a jacket pressing part 32a that comes into contact with the rear surface of the jacket 1 inserted into the holder 30. has been done. Further, an engaging portion 32b that can be engaged with the engaging hole 30 on the rear upper surface of the holder is formed on the upper surface of the other end. Also, this elastic member 32
is attached in a biased state so as to always maintain upward pressure, that is, the back surface of the upper plate of the holder 30. Therefore, when inserting or ejecting the jacket, the engaging portion 32b
moves while sliding while being pressed against the back surface of the upper plate of the holder 30.

In this state, when the jacket l is inserted from the jacket insertion opening of the holder 30, the jacket discharge member 32 is pressed backward against its elasticity and rotates in the direction of the arrow in FIG. When it reaches the position facing the engagement hole 30k of the holder 30, it is engaged into the engagement hole 30 by the upward pre-pressure.

As a result, the jacket ejecting member 32 is locked in the pressed position, and the jacket 1 is kept housed in the holder 30 without being ejected from the holder 30.

This state is shown in FIG. 3(b).

Note that when the jacket l is inserted into the holder 30, the holder 3
The front edge of the shutter 4 comes into contact with the shutter opening member on the inner surface of the jacket, and the shutter 4 is opened by the operation of inserting the jacket. Further, prior to this operation, a shutter lock release protrusion (not shown) on the inner surface of the holder engages with the shutter lock lever 5, so that the shutter 4 is unlocked.

After storing the jacket and closing the lid 40, the image shown in Fig. 3 (C) will appear.
As shown in FIG. 2, the holder 30 is also closed via the leaf spring 50a against the coil spring 31, and the holder 30 is rotated until its lower surface abuts against the protrusion 20k.

The jacket 1 within the holder 30 is positioned vertically and horizontally by positioning posts 14a to 14c on the chassis 10. Then, the magnetic head 13 is inserted through the opening 1b with the shutter 4 open and brought into contact with the disk 2.

Further, by closing the lid 40 against the leaf spring 50a, the lid 40 is locked in the closed position by a locking mechanism to be described later. Further, the protrusion 40F on the lower surface of the lid body 40 is inserted into the hole 30 of the holder 30, and the engaged portion 32b of the jacket discharge member 32, which is locked, is disengaged. As a result, the jacket discharge member 32 comes into a state in which the pressing portion 32a is pressed against the rear surface of the jacket l due to its elasticity.

This pressing also has the effect of eliminating rattling between the positioning posts 14a, 14b and the positioning holes lc, ld of the jacket l. This state is shown in FIG. 3(d).

In this state, the stabilizing plate 11 attached to the lid body 40 side
is inserted into the opening ld of the jacket 1 through the opening 30e of the holder 30, and the contact between the magnetic head 13 and the disk 2 can be stabilized.

Further, at a position facing the center core 3 of the disk 2 on the holder 30, there is a PG for detecting the rotational phase of the disk.
Coil 35 is positioned at a predetermined detection position.

In the process of closing the holder 30 described above, when the center core 3 of the disk 2 is attached to the spindle 12, the disk pressing member 36 disposed on the holder 30 operates to push the center core 3 toward the spindle 12. An operation is performed to forcefully fit the two.

These individual operations will be described later. Therefore, when the lid body 40 is next unlocked and opened together with the holder 30, the elastic member 32 serving as the jacket discharge member returns elastically in the direction opposite to the arrow A, as shown in FIGS. 2 and 3(a).
The jacket l is returned to the position shown in FIG. 2, and the jacket l is ejected to the outside of the holder 30, that is, in the direction opposite to the arrow IN, and can be easily taken out.

Further, a shutter closing mechanism is provided which automatically closes the shutter 4 which has been opened by the operation of ejecting the jacket 1 from the holder 30.

As described above, as shown in FIGS. 1 and 2, the shirt closure member 34 made of a leaf spring is disposed on the left inner surface of the holder 30. In the shirt shutter closing member 34, one end of the leaf spring on the inside of the holder is fixed to the left inner surface of the holder by caulking or the like, and the other end on the jacket insertion opening side is engaged with the engaging portion 4a of the shutter 4. A protrusion 34a is formed by bending. The protrusion 34a has a sloped surface on the jacket insertion side, and when the jacket 1 is inserted, the front edge of the shutter 4 can easily pass over the protrusion 34a and be introduced into the engagement hole 4a.

Therefore, when the jacket 1 is stored in the holder 30, the shutter 4 is locked by the jacket closing member 34, so the shutter 4 can be closed by the operation of ejecting the jacket 1 from the holder 30. . Further, as is clear from the enlarged view of FIG. 4, the free end 34b of the shirt closure member 34 extends outward from the side surface of the holder 30, and the free end 34b extends outward from the side surface of the holder and the protrusion 30 cut up on the side surface.
It is sandwiched between it and j' without being fixed. As a result, when the jacket 1 is inserted and the shirt closure member 4 is pressed outward from the side of the holder, the free end will not protrude to the side and will not interfere with other members. In addition, since both ends of the leaf spring are restricted, a stronger elastic engagement force can be obtained compared to one in which the other end is free.

Furthermore, when the leaf spring is bent, since its free end 34b is not fixed, stress applied to the leaf spring can be released, and the durability of the leaf spring, that is, the shirt closure member is excellent.

(2) Regarding the locking mechanism of the lid 40 (holder 30) and the means for detecting the completion of loading of the jacket, the lid 40. Figures 5(a) to 5(a) show a locking mechanism for locking the holder 30 in its closed position and a detection mechanism for detecting that the jacket l has been reliably loaded into the jacket loading section and that the holder and lid have been locked. This will be explained using FIG. 5(d).

FIG. 5 shows the structure of the back side of the front plate 20a of the frame 20. On the front side of the front plate 20a of the frame 20, a lock lever 28 for locking the lid body 40 in the closed position is located through its elongated holes 28a, 28b. and pin guide 20 on front plate 2Oa
1a and 202a so as to be slidable left and right, and an operating portion 28c at one end thereof protrudes to the side of the frame 20 and is attached for operation.

A protrusion 28d extending from the upper edge of the lock lever 28 is provided with a lock pin 28e that engages with and locks the lock pawl 40e when the lid 40 is opened.

Further, a lock lever 27 for holding the lock lever 28 in the unlocked position is rotatably attached at one end to the guide bin 202a, and is connected to the lock lever 28 by a spring 29a.

The other end of the locking lever 27 has a protrusion 27a that engages with the lower edge of the lid 40 and is pushed down when the lid 40 is closed.
is formed at a predetermined position on the upper edge and engages with an engagement piece 28f bent on the side of the lock lever 28, so that the lock lever 28 is placed in the left position (unlocked position) when viewed from the figure. An engaging stepped portion 27b is formed to engage with.

Also, at the left end of the front panel 20a, there is a jacket 1.
A leaf switch SW is attached to detect when the cassette is loaded at a predetermined cassette loading position and when the lid 40 is completely locked. In the guide bin 201a, a switch control lever 26 is always biased counterclockwise by a spring 29b to operate the leaf switch SW depending on the presence or absence of a jacket in the holder and the movement of the lock lever 28 when the holder is closed. It is arranged so that it can rotate freely. An engaging portion 26a that is pressed by the lower surface of the jacket in the holder 30 is formed at one end of the control lever 26, and an operating portion 26b for operating the leaf switch SW is formed at the other end.
Furthermore, a notch 26c and a protrusion 26d are formed approximately in the middle to engage with an engaging piece 28g bent on the side surface of the lock lever 28, respectively.

FIG. 5(a) shows the open or ejected state in which the operating portion 28c of the lock lever 28 is pushed to the left as viewed in the drawing, and the lock pin 28e is separated from the lock claw 40e of the lid body 40. Lid body 40. Both holders 30 are in an open state.

On the other hand, as the lock lever 28 moves to the left, the locking lever 27 is rotated counterclockwise via the spring 29a, and the protruding piece 27a is projected upward, that is, to a position where it can engage with the lower surface of the jacket. It is in a state of being The lock lever 28 is locked at the left position, that is, at the unlocked position, by the engagement piece 28f being locked with the engagement step 27b of the locking lever 27. Further, the switch control lever 26 is rotated counterclockwise by a spring 29b, so that the operating portion 26b is separated from the leaf switch SW, and the engaging portion 27a is projected to a position where it can be engaged with the lower surface of the jacket.

In this state, when the lid 40 is closed to the main body of the apparatus, in the process, the holder 30 is first moved to a predetermined loading position, as shown in FIG. 5(b). At this time, if the jacket is housed in the holder 30, the switch control lever 26 rotates clockwise against the spring 29b as the engaging portion 26a is pushed down by the lower surface of the jacket, and the operating portion 26b is rotated clockwise. Move to a predetermined position adjacent to SW.

Subsequently, by closing the lid body 40 to the lock position,
The lock claw 40e is the lock pin 2 of the lock lever 28.
The position is opposite to 8e. On the other hand, the locking lever 27 is
The lower front edge of the lid body 40 presses the engaging portion 27a and rotates counterclockwise against the spring 29a, releasing the lock lever 28 from the engaging stepped portion 27b. The lock lever 28 is slid to the right by the elasticity of the spring 29a, and the lock pin 28e is moved to the lock claw 4 of the lid body 40.
0e to lock the lid body 40 and holder 30 in the closed position.

Also, by sliding this lock lever 28, the engaging piece 2
8g rides on the upper surface of the protrusion 26d of the switch control lever 26 and rotates it clockwise.

As a result, the leaf switch SW is closed, it is detected that the jacket 1 has been loaded and the lid has been locked, and recording, reproducing operations, etc. are performed by a control circuit (not shown). This state is shown in FIG. 5(C).

By the way, the holder 30. If the jacket 30 is not stored in the holder 30 when the lid 40 is closed, the switch will not be activated when the holder 30 is closed to the position shown in FIG. 5(b) because the jacket l is not present. The control lever 26 is not rotated, and therefore the operating portion 26b is not moved from the position spaced apart from the leaf switch SW. In this position, the notch 26c of the switch control lever 26 faces the engagement piece 28g of the lock lever 28. Therefore, the lid body 4o is closed to the lock position, and the lock lever is
28 slides to the right and locks it, the engaging piece 28g is engaged in the notch 26c of the switch control lever 26, the switch control lever 26 does not rotate, and the leaf switch SW is closed. Not done. As a result, it is detected that the jacket is not housed in the holder 30 when the lid is completely locked. This state is shown in FIG. 5(d). Further, in this case, since the switch control lever 26 is locked by the lock lever 28, there is no possibility of rattling due to vibration or the like and no malfunction of the switch SW.

When the lid body 40 and the holder 30 are opened, the operation part 28c of the lock lever 28 is pressed and slid to the right unlocked position.

By unlocking the lid 40, the lid 40 and the holder 30 are opened, and the locking lever 27 also rotates clockwise with the opening operation of the lid 40, so that the engagement step 27b
The engaging piece 28f of the lock lever 28 is locked, and the lock lever 28 is locked to the unlocked position and returned to the position shown in FIG. 5(a).

Since the lock lever 28 is held at the unlocked position until the lid 40 is closed, the lock lever does not become a load when the lid is closed, and the closing operation can be performed smoothly.

(3) About the disk pressing mechanism When closing the holder 30 to the device main body chassis 10 and mounting the stored disk in the jacket 1 onto the spindle 12, the center core 3 of the disk is pressed toward the spindle 12. As mentioned above, the disc pressing mechanism 36 for forcibly fitting the discs is provided.

In a device like this device, which fits the hole in the center core 3 into the spindle 12, a pressing force of about 100-odd grams is required to securely fit the center core 3 into the spindle. If a disk is loaded by simply opening the holder, there is a risk that the center core and spindle may be misaligned or the center core may be uneven, resulting in incomplete loading. A disk pressing mechanism is provided to prevent this.

Referring to FIG. 1, the opening 30 on the top surface of the holder 30
A disk pressing lever 36 is rotatably supported approximately in the middle of a shaft 37 disposed between support pieces 30g and 30h on both sides of f, and is supported by a leaf spring 50d attached directly to the lid body 40. The disk pressing portion located on the center core 3 is urged counterclockwise, that is, in a direction in which the disk pressing portion located on the center core 3 is separated from the spindle 12. This spring may be weak, since it is only necessary to separate the disk suppressing portion from the center core of the disk.

As is clear from FIG. 2, the disk pressing portion 36a is
The upper end of the spindle 12, the left side, has a pressing protrusion formed at its tip in order to avoid the PG detection member 35 and press the upper surface of the center core 3 at two points on both sides.

It is composed of right arms 361a and 362a.

At the end opposite to the spindle 12, a frame 2 is attached.
An engaging piece 36b that engages with the control lever 23 rotatably attached to the shaft 24 is formed on the left side surface. The control lever 23 is biased clockwise by a spring 25 that is stronger than the leaf spring 50d that biases the disk pressing member 36, and its rotational position is restricted by a protrusion 20β on the side surface of the frame 20.

Now, in the open state shown in FIGS. 6(a) and 7(a), when the jacket l is inserted into the holder 30 and the lid body 40 is closed, the holder 30 first comes into contact with the lid body 40 and the plate as described above. It starts moving to the jacket loading position while maintaining a predetermined distance by the spring 50d. In the open state, the disk pressing lever 36 is moved by the disk pressing portion 36a (361a) by the leaf spring 50d.

362a) is rotated in a direction away from the center core 3 of the disk 2. Therefore, when inserting the jacket l into the holder 30, the disk pressing part does not get in the way, and operability is good.

FIG. 6(b) shows the state immediately before the holder 30 reaches the closed position.

As shown in FIG. 7(b), the engaging piece 36b of the disc pressing lever 36 comes into contact with the protrusion 23a at the tip of the control lever 23, and the holder 30 is further closed, so that the disc pressing lever 36 is The engaging piece 36b is pushed up and rotated clockwise by the control lever 23, and the disk pressing portion 36a presses the center core 3 of the disk 2 toward the spindle, forcing it to fit into the spindle 12. In order to perform this pressing operation, the spring 25 for biasing the control lever 23 needs to be stronger than the spring 50d for separating the disk pressing lever 36 from the disk.

When the holder 30 is further lowered to the closed position, the disk pressing lever 36 does not rotate any further after the center core 3 is fitted to the spindle 12, and its engagement piece 36b moves the control lever 23 to the spring 25. Push down against this and rotate counterclockwise. This makes it possible to absorb the extra pressing stroke of the disk pressing lever 36 after the fitting operation between the center core 3 and the spindle 12 is completed.

Therefore, damage to the center core 3 and the disk pressing mechanism can be prevented.

The holder 30 is moved to a predetermined loading position, and the lid 40 is closed against the leaf spring 50a disposed between it and the holder 30, and the lid 40 is locked in the closed position as described above. When the position is reached, as shown in FIG. 7(c), the engaging part 40g on the lower edge of the lid body 40 presses the end engaging part 23b of the control lever 23, which is further rotated counterclockwise. move. As a result, the protrusion 23a of the control lever 23 is disengaged from the engagement piece 36b of the disc pressing member 36, the disc pressing lever 36 is released from the pressed state by the control lever 23, and is rotated counterclockwise again by the leaf spring 50d. Then, as shown in FIG. 6(c), the disk pressing portion 36
A is separated from the center core 3. Therefore, after the center core 3 of the disk 2 is fitted to the spindle 12, the pressing load is released, and unnecessary rotational load is not applied thereafter, making it possible to perform smooth and reasonable disk rotation control.

Also, press the operating part 28c of the lock lever 28 to
0, and remove the lid 40. The operation when the holder 30 is opened will be explained.

Lid body 40. Since the holder 30 is opened by the coil spring 31 of the hinge 21, the control lever 23 is rotated clockwise by the spring 25, as shown in FIG. 36
It comes into contact with the engaging piece 36b of and lightly holds it. Therefore, even when the lid body 40 and the holder 30 are opened, the disc pressing lever 36 and its biasing spring 50d are locked at the released position, that is, the non-pressing position. Thereby, the disk pressing lever 36 can be held securely so that it does not move toward the center core 3 or wobble due to vibration or the like.

Then, by further opening the holder 30, the center core 3 of the disk 2 is detached from the spindle 12, and
The disk pressing lever 36 is also completely separated from the control lever 23 and returns to the position shown in FIGS. 6(a) and 7(a).

As described above, the disk pressing mechanism of this device is
is closed and temporarily presses the disk only when it is installed on the spindle, and is released from the holder in other situations, so there is no sudden load change on the spindle when loading or unloading the disk. It has excellent reliability and operability. According to the disk pressing mechanism of the present invention, the disk pressing lever is always biased in the direction of releasing the pressure on the center core, and it is only necessary to press the center core with an external force when loading a disk. The spring for releasing the disk pressure lever should be as strong as necessary to release the pressure (it can be weak, and there is no risk of deforming or rattling other parts. In other words, it should always be biased in the direction of pressing the disk. This type of mechanism requires a strong pressing force, so a large force is also required to release it, and a strong force is required to maintain the release position even after the jacket loading operation is completed.Therefore, There is a problem that the accuracy of the mechanism part after loading is likely to deteriorate.According to the device of the present invention, the disk pressing lever 36
The control lever 23 that applies a pressing force to the disc only operates when the lid is closed, and does not act equally on the disk pressing member or other members on the holder in both the open and closed (loaded) states. Therefore, the above problem does not occur.

(4) Regarding the stabilizer plate The stabilizer plate 41 attached to the back surface of the lid body 40 via the support plate 42 is attached to the holder 3 when the holder 30 and the lid body 40 are closed.
As described above, the magnetic head 13 is provided to stabilize the head touch by coming into contact with the magnetic head 13 at a position facing the disk 2 through the opening 30e of the jacket and the opening 1a of the jacket. A specific supporting method will be explained below using FIGS. 3 and 8 to 1O.

FIG. 8 shows the structure of the lid body 40, and in order to make the internal mechanism easier to understand, the lid body itself is shown in dashed lines.

The stabilizer plate 41 is attached to the cover body 40 in a suspended manner via a support plate 42. As is clear from FIG. 3, a groove 41a is formed in the stabilizing plate at a position facing the magnetic head 13 in accordance with the moving path of the head.

The support plate 42 has a rear long hole 42a42b on the hinge side.
By fitting into the bottles 44a and 44b set up on the lid body 40, and by engaging the engagement protrusion 42c on the front side, which is the jacket insertion opening side, with the hole 40d on the front surface of the lid body. It is arranged so that it can move slightly in the vertical and horizontal directions, and is always urged downward, that is, toward the holder 30 side, by a leaf spring 50b.Although not shown, the bottle 44a.

Needless to say, the tip of the support plate 44b is provided with a means to prevent the support plate 42 from falling off, such as a locking member is attached or a large diameter portion is formed in the bottle itself.

Further, a notch 42d is formed at the rear edge of the support plate 42 to engage with a bottle 10f having a conical tip on the chassis when loaded onto the chassis 10 of the main body of the apparatus.

Also, the engagement protrusion 4 of the support plate 42 in the engagement hole 40d of the lid body 40
As shown in FIGS. 9 and 1O, the engaging portions 2c are formed with inclined engaging portions 401d and 401d. Therefore, when the lid body 40 is open, the support plate 42 is pressed toward the holder by the leaf springs 50b, 50b, 50b, and the engagement protrusion 42c engages the engagement portions 401d, 401d.
01d and is positioned at the center of the engagement hole 40. This makes it possible to control the attachment position of the stabilizer 41 even when the lid is open and the stabilizer 41 is separated from the disk. The position may vary,
Consideration has been taken to avoid inconveniences such as incomplete engagement with the positioning means.

As is clear from FIGS. 8, 9, and 10, the support plate 42 is positioned with respect to the apparatus main body chassis 10 by positioning pins 43a to 4 screwed into three locations on the support plate 42.
3c to the positioning post 14a=14 on the chassis lO.
This is done by engaging the notch 42d with the bin 10f. Positioning bin 43a~
As shown in FIGS. 9 and 10, 43c is a wave-shaped washer 431a with a distal end protruding downward from the support plate 42.
-4310 etc., and by adjusting the amount of screwing in, the position of the support plate, that is, the stabilizing plate 41 can be adjusted. Further, the bottle 43a has a conical projection formed at its tip.

Therefore, the holder 30. When the lid body 40 is closed,
As is clear from FIGS. 3 and 10, the support plate 42 connects the positioning bins 43b and 43c to the chassis 1, respectively.
0 on protrusions 10g and 10h, cut out 42d on protrusion 1
At 0f, the positioning pins 43a are pressed into engagement with the positioning posts 14a fitted in the positioning holes IC of the jacket by the leaf springs 50b, thereby positioning them to the operating position. As a result, the positioning of the stabilizer 41 and the chassis 10 and the positioning of the jacket can be performed with one positioning member, and the position of the stabilizer, which requires highly accurate setting with respect to the jacket, can also be accurately regulated. . At this time, the mounting position of the support plate 42 is set so that it is raised toward the lid 40 side against the leaf spring 15b, so that the engagement protrusion 42c is engaged as shown in FIG. Slope 4 of matching hole 40d
01d and 401d so that positioning on the lid body 40 side does not interfere with positioning on the chassis 10.

With the above configuration, the vertical positioning of the support plate 42, that is, the stabilizing plate 41 is performed using the positioning post 14a and the protrusion 10g.
, 10h, and horizontal positioning is performed by the positioning post 14a and the bin 10f.

(5) Regarding the rotational phase detection member (PG) The rotational phase detection member (PG) 35 that detects the rotational phase of the disk 2 is
The spindle 12 is arranged in a position close to and facing the center core 3 of the disk 2, and the magnetic bottle 3b on the center core
The rotational phase of the disk is detected by detecting the magnetic flux induced from the spindle magnet 12b arranged in the spindle magnet 12b.
As is clear from FIG. 11, the detection bottle 353a and the flange 3
A detection coil is wound around a yoke 353 consisting of 53b,
Further, a magnet 354 is disposed on the opposite side of the collar portion 353b. This magnet is used to strengthen the magnetism detected by the PG coil 352.

That is, the polarity of the magnet 354 is set so that it acts to draw the lines of magnetic force induced from the magnet 12b on the spindle 12 through the magnetic bottle 3b into the detection coil 352. This polarity may be appropriately set depending on the polarity of the spindle magnet 12b. As a result, it is possible to obtain a sufficient detection signal level for weak PG without having to increase the number of coil windings as in the past. Highly sensitive detection can be performed without causing problems such as S/N deterioration due to contamination.

In particular, since various members are arranged on the center core 3, including a disk pressing member for pressing the center core 3 and attaching it to the spindle, miniaturization of the PG detecting member is extremely effective.

In this embodiment, the magnet 354 is separately arranged on the yoke 353, but the yoke itself may be magnetized and used as a magnet, and the same effect can be obtained.

The yoke 353 to which the above-mentioned PG coil 352 is attached is
It is attached to the upper surface of the holder at a position facing the center core 3 via the PG holder 351, and its attachment structure will be explained as will be clear with reference to both the top view in FIG. 2 and the perspective view in FIG. 12. In addition, a hole 30m for attaching a PG detection member is formed on the upper surface of the holder 30, and a notch 30n, which is narrower in width than the diameter of the hole 30m and connected to the opening 30e, is formed in a part of this hole. ing.

On the other hand, the PG holder 351 is formed with an engagement groove 351a on its outer periphery, which has a diameter equal to or slightly larger than the hole 30m and a width approximately equal to the thickness of the upper plate of the holder. Small diameter portion 3 that can pass through the notch 30n
51b is formed.

Therefore, when attaching the PG detection member 35 to the holder 30, the small diameter portion 3 of the engagement groove 351a of the PG holder 351
51b into the mounting hole 30m from the opening 30e side through the notch 30n, and from this state, rotate the PG holder approximately 90 degrees in the direction of arrow a to insert the small diameter portion 351b into the notch 30m.
By moving it to a position where it does not face n, it can be held within the mounting hole.

In addition, when the PG holder 351 is inserted into the mounting hole 30m,
It is designed to reach the optimal position by rotating it by 0 degrees, but by making the center of rotation in the engagement groove part and the mounting position of the PG yoke slightly eccentric, the PG
The position of the PG coil relative to the magnetic bin 3b on the center core 3 can be adjusted by rotating the holder left and right while fitted into the mounting hole 30m. In the figure, 351C is a hole for engaging an adjustment jig when rotating the PG holder 351.

A further feature of this PG mounting structure is the means for positioning its operating position. In FIG. 11, with the holder 30 closed and the center core 3 of the disk mounted on the spindle 12, the PG holder 35 is
The lower surface of the PG holder 351 contacts the upper end of the non-rotating support shaft 12a of the spindle 12, and the PG holder 351 can be positioned in the vertical direction by the spindle shaft. The upper end of the spindle is a fixed shaft that rotatably supports the spindle 12 via a bearing 12c, and the rotation of the spindle is not hindered by engagement with the PG holder 351.

As a result, the position of the PG coil can be regulated relative to the spindle that supports the center core 3 without providing a separate member for positioning the PG holder 351 (and without being affected by errors caused by the hinge 22, etc. of the holder 30). Therefore, positional accuracy can be easily obtained.

In addition, due to the lifting of the holder 30, etc., the PG holder 351
so as not to rise above the upper end of the spindle and cause variations in the distance between the PG yoke and the magnetic bottle 3b of the center core.
When the lid body 40 is opened, the PG holder 351 is moved by the leaf spring 50c provided inside the lid body 40 in accordance with the closing of the lid body 40.
Since a part of the PG is pressed against the support shaft 12a of the spindle 12, the positional relationship between the PG and the spindle is reliably maintained with high precision.

In addition, 12b in the figure is a cap for attaching and positioning the spindle 12 to the support shaft 12a.

(6) Regarding the configuration of the biasing springs of each mechanical part In the above description, in this device, the leaf spring 50a arranged between the lid body 40 and the holder 30, and the support plate 42 to which the stabilizing plate 41 is attached are used. Leaf spring 50t that urges toward the holder side>, PG
A leaf spring 50c that biases the detection member toward the spindle, and a leaf spring 50d that biases the disk pressing lever 36 in the release direction.
As shown in FIG. 8, these leaf springs are integrally molded on a leaf spring substrate 50 attached to the back surface of the lid 40. Therefore, by simply attaching the leaf spring substrate 50 to the lid body 40, all of the plates can be attached and positioned at predetermined operating positions at the same time. Further, the pressing force of each leaf spring can be individually set by appropriately changing the position of the bent portion of the leaf spring.

In addition, the leaf springs are also dispersed so that the pressing force of the springs is not concentrated on a part of the lid or holder, so unnecessary force is not applied to other mechanical parts (to ensure a stable mechanical part). realizable.

(Effects of the Invention) As described above, according to the recording or reproducing apparatus of the present invention, the shutter closing member disposed in the holder is formed of an elastic member, one end of which is fixed, and the shutter is engaged with the shutter. Since the tll side where the engaging portion is formed is regulated by the engaging portion formed in the holder, the configuration can be simplified.

Also, when inserting the jacket, even if the shirt closure member rides on the jacket, it will not protrude to the side of the holder.
There is no risk of damage and accidents, and space can be reduced.

Further, since the free end portion of the elastic member is regulated, a strong engagement force can be obtained even if the elastic member itself is small.

Although the above-mentioned embodiments have been described with reference to the case where the present invention is applied to a recording or reproducing device, the present invention is not limited to this, and the present invention can be applied to any device using a recording medium equipped with a shutter. The invention can be used.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment in which the present invention is applied to a recording or reproducing device. Fig. 2 is a top view of the embodiment, and Figs. 3(a) to 3(d) are jackets. Side view for explaining the configuration and operation of the ejection means, holder, and lid body, No. 4
The figure is a perspective view of the shutter closing mechanism, FIGS. 5(a) to 5(d) are side views for explaining the structure and operation of the holder and M-body lock, and FIG. 6(a) ~Figure 6(C), Figure 7(a)~=47(d) is a front view, side view, and Figure 8~ for explaining the configuration and operation of the disk pressing mechanism
Fig. 10 is a diagram for explaining the structure of the support mechanism of the stabilizing plate and the leaf spring, Fig. 11 and Fig. FIG. 2 is a perspective view of an electric disk and its jacket used in the device of the embodiment. 1... Jacket 2... Magnetic disk 3... Center core 3b...
・PG bin 4...Shutter lO...
・Device main body chassis 12...Spindle 1
3...Heads 14a-14b...Positioning post 20...Frame 22...
... Hinge 23 ... Control lever 26 ... Switch control lever 27 ... Locking lever 28 ... Lock lever 30 ... Holder 32... Jacket ejection lever 34...
・Shutter opening lever 35...PC detection member 36...Disk pressing lever 38...PC relay board 40...Lid body 41... Stabilizing plate 42...Supporting plates 43a to 43c...Positioning pin 50...
...Plate spring SW...Jacket loading lock detection switch, of course, Fig. 7(b) Fig. 72

Claims (1)

[Claims] In a recording or reproducing apparatus using a cassette equipped with a shutter that can be opened and closed in an opening that exposes a recording medium, an elastic member is provided that closes the shutter when the cassette is ejected from a holder that holds the cassette. The elastic member has one end fixed to the holder and has an engaging portion formed on the free end side to engage with the shutter, and the free end side is regulated by the engaging portion provided on the holder. recording or reproducing device.