JPH0626075B2 - Locking device for magnetic recording medium in magnetic recording / reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A magnetic recording medium in a so-called pop-up type device configured such that when a magnetic recording medium is unlocked, the magnetic recording medium is ejected from its holding portion by a pushing mechanism. By achieving the lock of No. 1 and the lock of the pushing spring of the pushing mechanism with one lock member, the structure is simplified and the reliability is improved. Further, since the push-out spring is locked not by the magnetic recording medium but by a lock member different from the magnetic recording medium, the magnetic recording medium can be finely moved within the holding portion.

BACKGROUND OF THE INVENTION The present invention moves a magnetic recording / reproducing head in the radial direction of a rotating magnetic recording medium to record a signal on an arbitrary track, reproduce a signal from an arbitrary track, or perform both recording and reproduction. In a magnetic recording / reproducing apparatus to be carried out, a locking device for locking the magnetic recording medium in its holding portion, particularly a so-called magnetic recording medium which is ejected from the holding portion by an pushing mechanism when the magnetic recording medium is unlocked The present invention relates to a bop-up type lock device.

The pop-up type locking device allows the magnetic recording medium to be ejected when the magnetic recording medium in the holding portion is unlocked, so that the magnetic recording medium can be easily taken out and the magnetic recording medium can be moved to a predetermined position in the holding portion. Unless it is pushed in firmly, the magnetic recording medium will pop out without being locked, so it has the characteristic that the magnetic recording medium can be mounted securely.

The pushing mechanism of the magnetic recording medium includes a spring for pushing the magnetic recording medium, and when the magnetic recording medium is mounted and locked in the holding portion, the pushing spring is deformed so as to exert a restoring force and It is locked in its deformed state. Conventionally, the pushing spring is locked by hitting a part of the magnetic recording medium locked in the holding portion. That is, since the pushing spring is pressed by the magnetic recording medium in a deformed state, when the lock of the magnetic recording medium is released, the restoring force of the pushing spring pushes the magnetic recording medium outward. This mechanism has the feature that the structure is simple because the lock of the push-out spring is unlocked when the lock of the magnetic recording medium is unlocked. However, since the restoring force of the push-out spring always acts on the magnetic recording medium, The recording medium cannot be freely displaced in the holding portion. When recording / reproducing on / from a magnetic recording medium, the magnetic recording medium must be properly positioned with respect to a spindle motor or a magnetic head for rotating the magnetic recording medium. For this positioning, it is preferable that the magnetic recording medium can be slightly displaced within the holding portion.

In order to allow the magnetic recording medium to be finely movable within the holding portion, the pushing spring must be locked by the magnetic recording medium instead of being locked by the magnetic recording medium. Then, it becomes necessary to interlock the lock mechanism of the magnetic recording medium and the lock mechanism of the pushing spring, and the configuration becomes complicated and the reliability becomes poor.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a magnetic recording medium locking device in a magnetic recording / reproducing device, which has a relatively simple structure and high reliability, and in which a magnetic recording medium can be finely displaced within a holding portion. And

A lock device for a magnetic recording medium in a magnetic recording / reproducing apparatus according to the present invention has a guide portion for guiding both sides of a magnetic recording medium having a locking engagement portion formed on one side for inserting and removing the magnetic recording medium. The holding portion, the spring for pushing out the magnetic recording medium provided in the back of the magnetic recording medium holding portion, and the opening formed in the guide member of the magnetic recording medium holding portion protrude into the holding portion and are inserted into the holding portion. And a first engaging portion that engages with the locking engaging portion of the magnetic recording medium and a part of the pushing spring that is deformed when the magnetic recording medium is inserted to a predetermined position in the holding portion. A first engaging portion of the lock member, the locking member having a second engaging portion, and the first engaging portion being biased in a direction in which the first engaging portion engages with the locking engaging portion. The second engaging portion has the lock member in the opposite direction to the urging direction. When brought displaced, characterized in that the engagement between the magnetic recording medium and extrusion spring is configured to disengage, respectively.

According to the present invention, the lock of the magnetic recording medium and the lock of the pushing spring are achieved by one lock member, so that the configuration is relatively simple and the adjustment thereof is easy.
Improves reliability. Further, the pushing spring is locked by engaging the lock member in a deformed state so as to exert a restoring force, and when the magnetic recording medium is locked, it does not come into contact with the magnetic recording medium and no Since no force is exerted on the magnetic recording medium, the magnetic recording medium can freely move within a certain range within the holding section. This ensures that the magnetic recording medium can be positioned and chucked by the spindle motor.

Description of Embodiments Embodiments of the present invention will be described below with reference to the drawings.

In this embodiment, an electronic still camera (still video camera) for electronically photographing a subject and recording a still image signal representing the still image on a magnetic disk of a video floppy (magnetic recording medium), and other Magnetic recording device,
The present invention is applied to a magnetic reproducing apparatus for reading out a still image signal recorded on a magnetic disk and displaying it on a television, a magnetic recording / reproducing apparatus having both recording and reproducing functions, and the like.

1 and 2 are plan views showing the entire structure of the video floppy lock device in the magnetic recording / reproducing apparatus. FIG. 1 shows that the video floppy F has a bucket (holding portion for the magnetic recording medium) 22. FIG. 2 shows the state in which the video floppy F is attached, and the state in which the video floppy F is attached, and FIG. 2 shows the structure of the base plate 20 and the lock member 30. Twenty-two top plates have been removed.

3 is an enlarged perspective view showing the vicinity of the rear portion of the bucket 22 (on the side opposite to the insertion port of the video floppy F), and FIG. 4 is a perspective view showing the side portion of the bucket 22.

First, the structure of the video floppy F will be described.
The video floppy F has a jacket 11 in which a magnetic disk 18 is rotatably and slightly movable. The disk hub (core) 19 at the center of the magnetic disk 18 is the jacket 1
Looking into the central hole 12 of No. 1. A window 14 for exposing the recording / reproducing area of the magnetic disk 18 to the outside is opened in a part of both surfaces of the jacket 11. This window 14 is normally closed by a shutter 15, but the bucket 2
The shutter 15 is automatically opened by an opening / closing mechanism (not shown) provided in the bucket 22 when the shutter 15 is inserted into the bucket 2.

On the side opposite to the side where the shutter 15 is provided, an engagement recess 17 is formed on the side surface of the jacket 11 for locking the video floppy F at a predetermined mounting position when mounted on the bucket 22. Instead of the recess 17, an opening may be provided in the side wall of the jacket 11.

Further, a hole 13 is formed at an appropriate position of the jacket 11 to receive a positioning pin (not shown) for positioning the video floppy F in the bucket 22.

Bucket 2 holding such a video floppy F
2 is fixed to the substrate 20 by screws. One bucket 22 may be provided in a magnetic recording device such as an electronic still camera, or an automatic changer (for example, Japanese Patent Application No. 62-110) in a magnetic recording / reproducing device.
(See No. 484), a plurality of them may be provided. Therefore, the substrate 20 may be a part of the bucket 22 (bottom plate), or may be a relatively large rotating disk provided with a plurality of buckets 22 or other moving body.

The outer end surface of the bucket 22 is fully opened for inserting the video floppy F and is notched in an arc shape (opening position and notch are indicated by 23). Further, the upper surface plate of the bucket 22 is largely cut out and an opening 24 is formed. Video floppy F mounted through opening 24
Window 14 and center hole 12 are exposed. On one side of the bucket 22, an opening 25 into which a locking pawl 34 formed on a locking member 30 described later is inserted is formed in the side surface plate 22a so as to correspond to the engaging concave portion 17 formed on the video floppy F. .

The substrate 2 is placed at a position corresponding to the opening 24 of the bucket 22.
An opening 26 is also formed at 0. The opening 26 is longer than the opening 24 of the bucket 22. After the video floppy F is mounted on the bucket 22 and locked, or when the recording / reproducing operation for the video floppy F is started, a regulating plate (not shown) is passed through the opening 24 and the window 14 from above. It enters and contacts the upper surface of the magnetic disk 18. From below, the magnetic head enters through the opening 25 and the window 14 and the magnetic disk 18
Touch the bottom surface (recording / playback surface) of the. Furthermore this substrate 2
A spindle (not shown) of a motor that rotationally drives the magnetic disk 18 advances into the opening 26 of 0 to chuck the magnetic disk 18.

Corresponding to the arcuate notch 23 of the bucket 22, an arcuate notch 21 is similarly formed in the substrate 20. These notches 21 and 23 are for facilitating attachment / detachment of the video floppy F to / from the bucket 22. Since a part of the video floppy F attached to the bucket 22 is exposed to the outside through these notches 21 and 23, the video floppy F can be easily attached and detached by hand.

The board 20 is further provided with a hole 27 through which a positioning pin for entering the above-mentioned hole 13 for positioning the video floppy F in the bucket 22 is inserted, and a lock member 30 described later is locked. The opening 29 into which the release action portion 31 is inserted is opened at a position deeper than the position of the bucket 22.

A lock member 30 for locking the video floppy F inserted in the bucket 22 and for locking the pushing spring 45 described later is provided on the base plate 20 in the lower portion of the bucket 22 to insert the video floppy F. A pin 36 pivotally attaches to the substrate 20 in the horizontal direction near the mouth. The lock member 30 is a metal plate, and a part thereof is cut out along the opening 26 of the substrate 20.

An end portion of the lock member 30 on the side opposite to the video floppy insertion port side extends to the outside of the bucket 22 and is bent downward to form a lock release action portion 31. The acting portion 31 enters the opening 29 formed in the substrate 20 and projects below the substrate 20. A part of the lock member 30 is bent upward to form a spring receiver 32 at a position close to the action portion 31.

A portion of the lock member 30 extending outward from the bucket 22 is further provided with a U-shaped notch, and a part of the member is bent upward. The part that is bent upward and rises is a locking piece 3 for locking the pushing spring 45.
It is 3. The locking piece 33 is formed in an oblique posture upward from the bucket insertion port side toward the rear of the bucket.

One side of the locking member 30 is the side plate 2 of the bucket 22.
It extends toward 2a, goes out through an opening 22b formed in the lower portion of the side plate 22a, and rises upward from that position. This raised portion 35 is a stopper piece. A part of the upper portion of the stopper piece 35 is bent toward the inside of the bucket 22 to form the pawl 34. The pawl 34 passes through the opening 25 in the side plate 22a of the bucket 22 and the bucket 2
It projects into 2. It is preferable that the size of the pawl 34 fits loosely into the engaging recess 17 of the video floppy F, and a slight gap is provided between the pawl 34 and the recess 17.

The scissor-shaped spring 40 for urging the lock member is provided further rearward of the lock member 30, and the coil portion thereof has a substrate 20.
It is attached to a pin 44 which is erected on. This spring 4
One end of 0 is fixed to a pin 41 provided on the substrate 20,
The other end 43 is hooked on the spring receiver 32 of the lock member 30. This spring 40 causes the locking member 30 to
4 is biased so as to project inward of the bucket 22. The stopper piece 35 is attached to the side plate 2 of the bucket 22.
It is held in the position shown in FIG. 1 or 2 by hitting 2a. The stopper may be formed by applying the unlocking action portion 31 to the edge portion of the opening 29.

The push-out spring 45 also has a shape close to that of a scissor-type spring, and the pin 4 erected on the base plate 20 at a position behind the bucket 22.
9 has its coil part attached, and one end has the same substrate 20
It is fixed to a pin 46 provided on the. The other end of the pushing spring 45 has a slightly complicated shape. In the state where the force shown in FIG. 2 is not generated, the other end portion first bends at a right angle in the horizontal plane into the bucket 22 (this relatively long portion is indicated by reference numeral 47), and further rises slightly vertically ( The acting portion 50) further bends at a right angle toward the outside of the bucket in the horizontal plane, and bends downward at the tip portion.
The tip end portion directed downward is the lock engagement portion 48.

The locking operation of the video floppy F will be described with reference to FIGS. 2 and 5 to 7. When the video floppy F is inserted so as to be guided to the side surface of the bucket 22, _first , as shown by the chain line F ₁ in FIG. 2, the position of the video floppy F is first provided with the corner portion of the front end of the lock member 30. The engaging pawl 34.

When the video floppy F is further inserted, the fifth
As shown in the figure, the side surface of the video floppy F provided with the engaging recess 17 resists the force of the biasing spring 40, and the pawl 3
4 is pushed from the inside of the bucket 22 to the outside, and the lock member 30 slightly rotates about the pin 36 as a center point. As the insertion proceeds, the front end of the video floppy F and the working portion 50 of the pushing spring 45 come into contact with each other.

Referring to FIG. 6, when the video floppy F is inserted into the bucket 22 with a force stronger than the restoring force of the pushing spring 45, the spring 45 is pushed to the rear portion of the bucket 22 and is deformed, The lock engaging portion 48 at the tip approaches the locking piece 33 of the lock member 30.

As the video floppy F is further inserted, as shown in FIG. 7, the lock engaging portion 48 rides on the slope of the locking piece 33 bent upward, and the lock engaging portion 48 climbs over the inclined surface of the locking piece 33 to the locking piece 33. The push spring 45 is engaged with the lock member 30.
Locked in. Further, the locking pawl 34 enters the engaging recess 17 formed on the side surface of the video floppy F, and the lock member 30 is returned to the original position by the force of the spring 40, and the video floppy F is also locked in this mounting position. It

At this time, the front end of the video floppy F and the pushing spring 4
It is parallel to the long part 47 of 5, and there is some gap between them. Further, the pawl 34 and the engaging recess 1
There is a slight gap between 7 and. Therefore, the restoring force of the pushing spring 45 does not act on the video floppy F,
The video floppy F can be finely moved within the above-mentioned gap.

When the video floppy F is completely stored in the bucket 22 as described above, the above-mentioned positioning pin (not shown) enters from below and is formed in the hole 27 and the video floppy F formed in the substrate 20. Video entering hole 13
Position the floppy F. Video floppy F
Further, since the restoring force of the pushing spring 45 does not act and the fine movement is possible, the positioning is easy.

If the video floppy F is released during the insertion of the video floppy F, the floppy F is pushed out of the bucket 22 by the pushing spring 45. Since the video floppy F is locked only after the video floppy F is mounted to a predetermined position in the bucket 22, it is possible to clearly judge whether or not the video floppy F is completely stored.

When the stored video floppy F is taken out from the bucket 22, a releasing means (not shown) such as an eject button causes the unlocking action portion 31 of the lock member 30 to move in the direction opposite to the biasing direction of the spring 40 ( (Shown by an arrow in FIG. 7), the engagement between the locking piece 33 and the lock engagement portion 48 is released, and the engagement between the pawl 34 and the engagement recess 17 is also released. Therefore, the pushing spring 4
The front end of the video floppy F is pushed by the acting portion 50 by the restoring force of 5, and the video floppy F is discharged from the inside of the bucket 22.

Since the video floppy F is completely stored in the bucket 22 and is released from the bucket 22 if it is not locked, the sensor 55 for detecting the storage of the video floppy F is shown by a chain line in FIG. 7, for example. By providing the position, the presence / absence of the video floppy F can be relatively easily achieved. And this sensor 5
The position accuracy of 5 is not required to be so high.

[Brief description of drawings]

1 to 4 show an embodiment of a locking device according to the present invention. FIG. 1 is a plan view, FIG. 2 is a partially cutaway plan view, and FIG. 3 is a locking device from the rear. 4 is a perspective view of the locking device seen from the side, FIG.
FIG. 6, FIG. 6 and FIG. 7 are views for explaining the locking operation, and are plan views showing respective cutaway portions. 17 ... engaging recess, 18 ... magnetic disk, 22 ... bucket, 25 ... opening, 30 ... locking member, 33 ... locking piece, 34 ... locking pawl, 40 ... biasing spring, 45 ... push-out spring, 48 ... lock engaging part, F ... video floppy.

Claims (2)

[Claims] 1. A magnetic recording medium holding portion having guide portions for guiding both sides of a magnetic recording medium having a locking engagement portion formed on one side for inserting and removing the magnetic recording medium, and provided at the back of the magnetic recording medium holding portion. And a locking engaging portion of the magnetic recording medium that is inserted into the holding portion and projects into the holding portion from an opening formed in the guide member of the magnetic recording medium holding portion. And a second engaging portion that locks a part of the pushing spring that is deformed when the magnetic recording medium is inserted to a predetermined position in the holding portion. The first engaging portion includes a lock member that is biased in a direction in which the lock member is engaged with the locking engaging portion. Magnetic recording medium and pushing spring when displaced in the direction opposite to the urging direction Engagement is configured to disengage each locking device of a magnetic recording medium in a magnetic recording / reproducing apparatus. 2. When the magnetic recording medium is mounted at a predetermined position in the holding portion, there is a slight gap between the locking engagement portion and the first engagement portion, and the second engagement portion. There is also a slight gap between the push-out portion of the push-out spring that is engaged with and the insertion tip of the magnetic recording medium, and the magnetic recording medium is held in the holding portion so that it can be freely moved. A lock device for a magnetic recording medium in the magnetic recording / reproducing device according to claim (1).