JP2526420B2 - Cassette loading device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The cassette loading device of the present invention will be described according to the following items.

A. Industrial field of use B. Outline of the invention C. Prior art [Figs. 9 and 10] a. General background b. Example of conventional cassette loading device [Fig. 9, Fig.
Fig. 10] b-1. Structure b-2. Operation D. Problems to be solved by the invention [Figs. 9 and 10] E. Means for solving the problems F. Embodiment [Fig. 1 To FIG. 8] a. Magnetic disk cassette [FIGS. 3 and 5 to 8] b. Mechanical chassis [FIGS. 1 to 7] c. Disk drive unit [FIG. 3] d. Eject slider [Figs. 1 to 4 and 7] e. Cassette carrier [Figs. 1 to 7] f. Toggle spring [Figs. 1 to 4 and 7] f-1. Configuration f-2 .Function g. Control arm [Fig. 1, Fig. 2, Fig. 4 and Fig. 5] g-1. Structure g-2. Support to cassette carrier g-3. Function g-3-a. Cassette carrier G-3-b. Lock release and cassette holding h. Shutter opening arm [Figs. 1, 2, 4, 5] i. Eject arm [Figs. 1, 2; 4 and 7
Fig.] J. Head support [Figs. 1 and 3] k. Operation [Figs. 1 to 3 and 5 to 7] k-1. Initial state [Figs. 1 and 2] ] K-2. Loading the cassette [Figs. 5 and 6] k-2-a. Opening the shutter [Fig. 5 (A)] k-2-b. Unlocking the cassette carrier, holding the cassette [ Fig. 5 (B)] k-2-c. Movement of cassette carrier [Fig. 5 (B), Fig. 6] k-2-d. Crimping of cassette carrier to completion position of loading [Fig. 3] k-3. Recording / reproduction [Fig. 3] k-4. Ejection of magnetic disk cassette [Fig. 7] G. Effects of the invention (A. Industrial field of use) The present invention relates to a novel cassette loading device.
More specifically, a cassette loading device for loading a recording medium cassette including a recording medium such as a magnetic disk or a magnetic tape in a cassette case, and in particular, a recording medium cassette is detachably inserted. A cassette carrier that moves between an eject position at which the recording medium cassette is inserted and removed and a loading completion position that is closer to the cassette insertion direction than the eject position and closer to the thickness direction of the cassette,
The present invention relates to a cassette loading device provided with a retracting means or the like that moves a cassette carrier to a loading completion position when a recording medium cassette is inserted into the cassette carrier, and locks and unlocks the cassette carrier at the eject position and the cassette carrier. A mechanism of this kind is extremely simple and each of the above-mentioned operations is performed by improving the mechanism for detecting the insertion of the recording medium cassette into the cassette and holding the inserted recording medium cassette in the cassette carrier. It is an object of the present invention to provide a novel cassette loading device that can be configured so as to be surely executed at a predetermined timing required in the meantime.

(B. Outline of the Invention) The cassette loading device of the present invention is configured such that a recording medium cassette is detachably inserted and that the recording medium cassette is inserted and removed, and the cassette position is closer to the cassette insertion direction than the eject position. A cassette carrier that moves between a loading completion position that is closer to the thickness direction, a support member that has a guide portion that guides the moving direction of the cassette carrier, and the cassette carrier when the recording medium cassette is inserted into the cassette carrier. A cassette loading device having a retracting means for retracting the recording medium cassette to a loading completion position, wherein the cassette carrier in which the recording medium cassette is not inserted is prevented from moving from the eject position and the recording medium cassette is inserted into the cassette carrier. And the above preventions made accordingly The released and inserted recording medium cassette can be held in the cassette carrier by one control member supported by the cassette carrier, so that the above-mentioned operations can be surely executed at necessary predetermined timings therebetween. In addition, the mechanism for performing these operations can be made extremely simple.

(C. Prior art) [Figs. 9 and 10] (a. General background) Recording is performed using a recording medium cassette in which a recording medium such as a magnetic disk or a magnetic tape is housed in a predetermined cassette case. A recording / reproducing apparatus for reproducing is usually provided with a cassette loading device for mounting the recording medium cassette in the cassette mounting portion of the recording / reproducing unit and for taking out the mounted recording medium cassette. Most of the loading devices are cassettes that are moved between an eject position where a recording medium cassette is removably inserted and the recording medium cassette is inserted and removed and a loading completion position where the recording medium cassette is mounted in a cassette mounting portion. It has a carrier (sometimes referred to as a "cassette holder" or "cassette compartment").

Further, there are various types of loading methods by the cassette loading device, and one of them is that when the recording medium cassette is inserted into the cassette carrier by a predetermined amount, the recording medium cassette is held by the cassette carrier and by a predetermined retracting means. There is a so-called automatic loading system in which the cassette carrier is pulled into the loading completion position. Further, the pulling means includes one in which the cassette carrier is pulled in by the elastic force of the elastic member and the other in which it is driven by the driving force of the motor. .

(B. Example of conventional cassette loading device) [9th
FIG. 10, FIG. 10] FIG. 9 and FIG. 10 show an example a of a conventional cassette loading device for retracting a cassette carrier by the elastic force of an elastic member.

(B-1. Structure) b is a magnetic disk cassette in which a magnetic disk d is rotatably housed in a cassette case c, and two head insertion holes e facing each other in the thickness direction of the case are provided in the cassette case c. e is formed and the head insertion holes e, e
A shutter f for opening and closing is provided slidably.
Reference numeral g denotes a disk mounting portion to which the magnetic disk d is removably mounted.

Reference numeral h denotes a cassette carrier into which a magnetic disk cassette b is removably inserted, which is opposed to the disk mounting portion g and is mounted on a chassis (not shown) at an eject position indicated by a solid line in FIG. 10 and a loading completion position indicated by a chain double-dashed line. And a tension spring i, which is stretched between the chassis and the chassis, constantly applies a moving force toward the disc mounting portion g.

j is a slider (only the side end is shown in the drawing)
Further, it is supported by a chassis (not shown) so as to be movable in the front-rear direction, that is, in the left-right direction in the drawing, and is always urged to move forward by an elastic means (not shown), which is higher than the cassette carrier h. The cassette carrier h has a locked arm k and a pressing arm 1 positioned at that position, and the cassette carrier h resists the tensile force of the tension springs i and i when the slider j is in the pushing-up position shown in FIG. 9 (A). Is held at the eject position and the slider j is moved to the mounting position by the pulling force of the tension springs i, i when the slider j reaches the non-push-up position shown in FIG. 9 (B).

m is a loading plate movably supported on the upper surface of the cassette carrier h within a certain range in the front-rear direction, n
Is a hook arm rotatably supported at the rear end of the loading plate m. The hook arm n is provided with an engaging protrusion o at its tip, and the magnetic disk cassette b is a predetermined one of the cassette carrier h. While the magnetic disk b is not inserted to the insertion position, it stands by at the position shown by the solid line in FIG. 9A, and when the magnetic disk b is inserted into the cassette carrier h by a predetermined amount, two points are shown in FIG. 9A. As shown by the chain line, the engagement protrusion o is moved to a position where it engages with an engagement recess p formed on the side surface of the cassette case c.

q is a shutter arm whose base end is rotatably supported by the rear end of the upper surface of the cassette carrier h, has a shutter pressing pin r at its tip and has a control hole s, and t has its base end. A lock pin u is rotatably supported coaxially with the shutter arm q, and a lock pin u is provided at the tip end thereof, and a pressed pin v having the tip end located in the control hole s of the shutter arm q is provided substantially at the center. The shutter arm q and the stopper arm t are stopper arms.
9A and 9B in the state where the moving force in the counterclockwise direction is biased by the elastic means not shown and the magnetic disk cassette b is not inserted into the cassette carrier h by a predetermined amount. A) is held at the initial position shown by the solid line, and in this state, the slider j is held at the push-up position by the locked arm k of the slider j coming into contact with the lock pin u of the stopper arm t from behind. .

Reference numeral w denotes a drive arm rotatably supported on the upper surface of the cassette carrier h, one end of which is slidably engaged with a notch formed at the front end of the loading plate m and is connected to the cassette carrier h. A tension spring x stretched in between is constantly biased in a clockwise direction, that is, a turning force for pushing the loading plate m rearward, and when the slider j is in the push-up position, the other end is pushed. The portion is brought into contact with the pressing arm 1 of the slider j from the rear side so that the loading plate m is locked at the position for holding the loading plate m in the non-loading position shown in FIG. 9 (A).

(B-2. Operation) Therefore, when the magnetic disk cassette b is inserted into the cassette carrier h from the initial state shown by the solid line in FIG. 9 (A), the shutter pressing pin r of the shutter arm q relatively releases the shutter. The shutter f is engaged with one end of f
Is pushed toward the position where the head insertion holes e, e are opened, and at the same time, the head insertion holes e, e are almost opened as shown by the two-dot chain line in FIG. 9 (A). From the time point, one side edge of the control hole s of the shutter arm q presses the pressed pin v of the stopper arm t to stop the stopper arm t.
Move clockwise. As a result, the lock pin u of the stopper arm t escapes sideways from the locked arm k of the slider j, so that the slider j is moved to the non-pushed-up position, and the engaging protrusion o of the hook arm n is moved to the cassette case c. The magnetic disk cassette b is indirectly held by the cassette carrier h. When the slider j is moved to the non-push-up position, the lock of the drive arm w by the slider j is released.
Is rotated clockwise by the pulling force of the tension spring x, whereby the loading plate m and the hook arm n are integrally moved backward as shown in FIG. The magnetic disk cassette b is pulled to the insertion completion position in the cassette carrier h, the cassette carrier h is moved to the loading completion position, and the magnetic disk d is mounted in the disk mounting portion g.

When the magnetic disk d is mounted in the disk mounting portion g, a recording / reproducing head (not shown) is inserted through the head insertion holes e, e of the cassette case c and brought into contact with the magnetic disk d. The magnetic disk cassette b is taken out by moving the slider j to the push-up position.
That is, when the slider j is moved to the push-up position from the state shown in FIG. 9 (B), the cassette carrier h is returned to the eject position and the end of the drive arm w is reversed by the pressing arm l of the slider j. The loading plate m is returned to the non-loading position by being rotated in the clockwise direction, and the shutter arm q and the stopper arm t are returned to the initial positions by the turning forces biased by the shutter arm q and the magnetic disk cassette b. The pressing force of the shutter arm q returning to the initial position pushes it out of the cassette carrier h, and the lock pin u of the stopper arm t returning to the initial position engages with the locked arm k of the slider j from the front side. Lock j in the push-up position.

(D. Problems to be solved by the invention) [Figs. 9 and 10]
Drawing] Such a cassette loading device a has various problems as follows. First, as an elastic means for loading the magnetic disk cassette b, a tension spring x for pulling the magnetic disk cassette b to the insertion completion position in the cassette carrier h and a tension spring for pressing the cassette carrier h onto the cassette mounting portion. Since i and i are required, there is a problem that the number of parts and the number of assembling steps increase, and therefore the structure is complicated and the cost increases.

Further, in this type of cassette loading device, there are provided means for holding the recording medium cassette in the cassette carrier, and means for locking the cassette carrier at the eject position until the holding means holds the recording medium cassette. A control mechanism including means for releasing the lock when the recording medium cassette is held by the cassette carrier is required.
Performs these operations by different members, that is, the cassette b.
Of the cassette carrier h is held by the hook arm n, the cassette carrier h is locked at the eject position by the stopper arm t, and the lock is released by the shutter arm q. There is the problem of complexity.

In addition, the above-mentioned operations such as holding, locking and unlocking or control need to be performed at a predetermined timing, and in particular, unlocking of the cassette carrier h and holding of the cassette b in the cassette carrier h are strict. However, since the cassette loading device a releases these locks and holds the cassette by separate members, the operation timing depends on the processing accuracy and assembly accuracy of each component. Can go crazy. If the operation timing is incorrect, for example, if the magnetic disk cassette b once inserted is pulled out in the middle, in some cases, the so-called empty drop of the cassette carrier h, that is, the magnetic disk cassette. As a result, an erroneous operation occurs in which the cassette carrier h moves to the loading completion position in a state where b is not inserted or the insertion is not performed up to the predetermined insertion completion position of the cassette carrier h. Such malfunction often leads to serious failure such as damage to the cassette carrier h or the magnetic disk cassette b or damage to the recording / reproducing head that moves as the cassette carrier n moves to the loading completion position.

(E. Means for Solving Problems) Therefore, in the cassette loading device of the present invention, in order to solve the problem of the control mechanism, the cassette carrier rotatably supported by the cassette carrier is moved to the eject position. When the recording medium cassette is inserted into the cassette carrier, the blocking is released by engaging with the engaging portion of the supporting member to prevent the cassette carrier from moving toward the loading completion position. A control member that moves in the direction and engages with the engaging portion of the recording medium cassette is provided.

Therefore, according to the cassette loading device of the present invention provided with the control member, it is possible to prevent the cassette carrier in which the recording medium cassette is not inserted from the eject position and to detect the insertion of the recording medium cassette into the cassette carrier. Since the blocking can be released and the inserted recording medium cassette can be held by the cassette carrier in accordance with this, one operation can be performed for each operation or control described above. It is possible to surely execute it at a predetermined timing without using any special means, and thereby, the reliability of the operation can be remarkably improved, and in particular, the cassette carrier can be surely prevented from dropping. And the mechanism for performing the above multiple operations or controls can be extremely simplified. Since it is, the trouble such as the number of parts and assembly steps or parts management can be significantly reduced, thus potentially realizing a significant cost savings.

(F. Embodiment) [FIGS. 1 to 8] The details of the cassette loading device of the present invention will be described below with reference to the illustrated embodiment.

In the illustrated embodiment, the cassette loading device of the present invention is applied to the cassette loading device in the magnetic disk driver 1.

First, an example of a magnetic disk cassette used in the magnetic disk driver 1 will be described, and then each part of the magnetic disk driver 1 will be described.

(A. Magnetic disk cassette) [Figs. 3, 5 to 8]
FIG. 2 is a magnetic disk cassette.

Reference numeral 3 denotes a cassette case of the magnetic disk cassette 2, which has a thin box shape having a substantially square shape when viewed from the thickness direction, and has two case walls 4 facing each other in the thickness direction.
Head windows 6, 6'long in the direction orthogonal to the front end surface 5 are formed in a portion between the central portion of 4'and one end surface 5 (hereinafter referred to as "front end surface"). A circular opening 7 is formed in the center of the case wall 4 '(hereinafter referred to as "lower surface wall").

A relatively shallow shutter arrangement recess 8 is formed in a portion of the front end surface 5 excluding both ends thereof, and a notch 9 is formed at a position near one end of the recess 8.

Reference numeral 10 denotes an extremely flat U-shaped shutter as viewed from the side, which is slightly larger than the head windows 6, 6'at a position offset toward one end side in the longitudinal direction of the two parts 10a, 10a facing each other. Openings 11, 11 are formed, and the portions 10a, 10a sandwich the portion closer to the front end face 5 side of the cassette case 3 from the thickness direction and the portions 10a, 10a.
And a continuous portion 10b which is continuous between and are positioned slidably in the cassette case 3 while being positioned in the shutter disposing concave portion 8, as shown by a two-dot chain line in FIG. The open positions where the parts 11, 11 open the head windows 6, 6'corresponding to the head windows 6, 6 ', and the closing for closing the head windows 6, 6'shown by the solid line in FIG. 5 (A). It is moved to and from the position, and the moving force toward the closed position side is constantly urged by an elastic member (not shown).

It should be noted that the end 9a of the notch 9 formed in the shutter placement recess 8 on the closed position side of the shutter 10 is not covered by the shutter 10 and is exposed even when the shutter 10 is in the closed position. .

Reference numeral 12 is a magnetic disk, which is composed of a circular magnetic sheet 13 and a center core 14 fixed to the center of the magnetic sheet 13, and two engaging holes 14a and 14b are formed in the center core 14 to form a magnetic disk. A center core 14 is rotatably housed in the cassette case 3 in a state where the center core 14 is positioned to face the outside through an opening 7 formed in the cassette case 3.

Engagement recesses 16 and 16 'are formed near the front ends of the left and right end surfaces 15 and 15' of the cassette case 3, and these engagement recesses 16 and 16 'are substantially half when the cassette case 3 is viewed in the thickness direction. It has a circular shape and also opens on the lower surface side of the cassette case 3.

(B. Mechanical chassis) [FIGS. 1 to 7] 17 is a mechanical chassis of the magnetic disk driver 1, and is in the front-back direction (the direction to the left in FIG. 1 is the front side, and the direction to the right is the rear side). In addition, the upward direction in this figure is the left side, and the downward direction is the right side, and the direction is used in the following description. The front and back are turned upside down.) 18
And the side walls 19 and 19 'rising upward from the left and right side ends of the main portion 18 are integrally formed, and are separated from each other in the front-rear direction on the upper surface of the main portion 18 near the left and right side ends. The pointing projections 20, 20, ...

The guide grooves 21, 21, ... Are formed near the front end of the side walls 19, 19 'in the approximately middle portion in the front-rear direction, and these guide grooves 21, 21 ,. twenty one
, and vertical portions 21b, 21b, ... extending downward from the rear ends of the horizontal portions 21a, 21a ,. .

Further, notches 22 and 22 are formed in the front guide grooves 21, 21, ... Of the side walls 19 and 19 ′ at portions close to the rear side, and the notches 22 and 22 extend forward from the upper portions of the rear edges thereof. Projected spring hook pieces 23, 23 are formed, and spring hook holes are formed in the spring hook pieces 23, 23.
23a and 23a are formed.

Reference numeral 24 is a spring hook piece formed in a cut and raised shape at a position below the cutout portion 22 in the lower portion of the right side wall 19 '.

Reference numeral 25 denotes an engagement hole formed at a position close to the rear side guide groove 21 of the right side wall 19 'from the rear side, and has a rectangular shape elongated in the front-rear direction.

(C. Disk drive section) [FIG. 3] 26 is a disk drive section for rotationally driving the magnetic disk 12 of the magnetic disk cassette 2.

Reference numeral 27 denotes a flat motor, which is fixed to a portion of the upper surface of the main portion 18 of the mechanical chassis 17 that is closer to the front side, and the center portion of the disk mounting plate 29 is fixed to a position near the upper end of the rotating shaft 28. The drive pin 30 is supported by the disc mounting plate 29.

The disk mounting plate 29 is the side wall 1 of the mechanical chassis 17.
Vertical portions 21b of the guide grooves 21, 21, ... Formed in 9, 19 '
It is located at approximately the same height as the bottom edge of.

(D. Eject slider) [Figs. 1 to 4 and 7
FIG. 31 is an eject slider, which is operated when the magnetic disk cassette mounted in the magnetic disk driver 1 is taken out.

The eject slider 31 has a substantially U-shaped plate shape when viewed from above, and its width in the left-right direction is substantially the same as the distance between the two side walls 19 and 19 'of the mechanical chassis 17. Support holes 32, 32 at the rear end thereof, and notches 33, 33 are formed at portions of the front side edge thereof near the left and right ends, respectively, and the eject slider 31 has the support holes 32, 32 and the notch 3
Slits 20a, 20a, ... formed on the inner side surfaces of the supporting protrusions 20, 20, ... provided on the mechanical chassis 17 at the side edges located inside 3, 33. (See Fig. 4)
By being slidably engaged with the mechanical chassis 17, the mechanical chassis 17 is supported so as to be movable in the front-back direction within a certain range.

Further, push-up pieces 34, 34, ... Having a substantially non-isosceles trapezoidal shape when viewed from the side are provided to project upward at positions near both front and rear edges of the left and right edges of the eject slider 31. The push-up pieces 34, 34, ... Are side walls 19, 1 of the mechanical chassis 17.
Located near the inner surface of 9'and its upper end is substantially the same as the lower edge of the horizontal portions 21a, 21a, ... of the guide grooves 21, 21, ... formed in the side walls 19, 19 '. It is located at the height and its rear edges 34a, 34a, ...

The eject slider 31 has a tension spring 36 stretched between a spring hook piece 35 protruding downward from the right side edge of the eject slider 31 and the spring hook piece 24 formed on the right side wall 19 ′ of the mechanical chassis 17. The pulling force constantly applies a forward moving force, and the rear edges of the support holes 32, 32 and the cutouts 33, 33 are supported by the supporting protrusions 2 while the backward pushing force is not applied.
0, 20, ... Is held in the non-pushed-in position shown in FIG. 1 by contacting the rear surface, and in this state, the push-up piece
The middle of the slanted edges 34a, 34a, ... Of 34, 34, ... substantially corresponds to the lower ends of the front side edges of the vertical portions 21b, 21b ,. It is located.

A push button (not shown) is attached to the front end of the eject slider 31, and the eject slider 31 is pushed in by pressing the push button.

(E. Cassette Carrier) [FIGS. 1 to 7] 37 is a cassette carrier into which the magnetic disk cassette 2 is removably inserted.

The cassette carrier 37 has a substantially U-shaped top plate 38 when viewed from above, narrow side pieces 39 and 39 'protruding downward from the left and right side edges of the top plate 38, and the side pieces 39 and 39. ′ Is formed by integrally forming narrow receiving edges 40, 40 ′ that project inwardly from each other from the lower edge and are substantially parallel to the top plate 38, and the width of the top plate 38 in the left-right direction is the mechanical chassis 17 The length is approximately the same as the distance between the side walls 19 and 19 ', and contact pieces 38a, 38a projecting downward are formed at the rear end portion.

Incidentally, the rear end of the right side piece 39 'ends before the rear edge of the top plate 38, and the top plate 38 of the right side edge 40' corresponds to the rear end of the right side piece 39 '. The portion 40'a located up to the position corresponding to the rear end is located slightly lower than the remaining portion.

Reference numerals 41, 41, ... Depict horizontally guided guide pins extending laterally from positions separated from each other in the front-rear direction of the side pieces 39, 39 ′, and their tip portions 41a, 41a ,. It is finer than the rest.

Reference numerals 42 and 42 denote spring hooks formed in a cut-and-out shape outwardly at a position closer to the front from the center of the side pieces 39 and 39 'in the front-rear direction, and have spring hook holes 42a and 42a formed therein. There is.

Reference numeral 43 is an arm support shaft vertically provided at a corner portion where a right side edge and a rear edge of the top plate 38 intersect.

In such a cassette carrier 37, the tip end portions 41a, 41a, ... of the guided pins 41, 41, ... are slidable in the guide grooves 21, 21, ... of the mechanical chassis 17. By being engaged, it is movably supported on the side walls 19, 19 'of the mechanical chassis 17, and as shown in FIG. 2, the guided pins 41, 41, ...・ Horizontal part 21
As shown in FIG. 3, the positions of the a, 21a, ... Abutting on the front ends (hereinafter referred to as “ejection positions”) and the guided pins 41, 41 ,. Vertical part of 21, ...
21b, 21b, ... Are moved to and from positions (hereinafter referred to as "loading completion positions") located near the lower ends.

Therefore, the cassette carrier 37 is substantially laid down L when viewed from the side.
It is designed to move along a character-shaped movement trajectory.

The magnetic disk cassette 2 is inserted into and taken out of the cassette carrier 37 while the cassette carrier 37 is at the eject position, and when the cassette carrier 37 is at the loading completion position, the magnetic disk cassette 2 is inserted into the cassette carrier 37. The second magnetic disk 12 is mounted on the disk mounting plate 29 of the disk drive unit 26.

(F. Toggle Spring) [FIGS. 1 to 4 and 7] 44 and 44 are toggle springs.

(F-1. Configuration) The toggle springs 44, 44 are substantially scissors composed of coil-shaped ring-shaped portions 45, 45 and two arms 46, 46 and 47, 47 extending straight from both ends of the ring-shaped portions 45, 45. Shaped like a spring, one arm
The tips 46a and 46a of the arms 46 and 46 are substantially U-shaped, and the tips of the other arms 47 and 47 are substantially crank-shaped.

And, such a toggle spring 44, 44 has a ring-shaped portion.
With the axial direction of 45, 45 along the left-right direction and the ring-shaped parts 45, 45 being located in the notches 22, 22 of the side walls 19, 19 'of the mechanical chassis 17, the tip end of one arm 46, 46 46a, 46a are locked in the spring hooking holes 23a, 23a formed in the side walls 19, 19 ', and the tips 47a, 47a of the other arms 47, 47 are attached to the side pieces 39, 39' of the cassette carrier 37. It is locked in the formed spring hook holes 42a, 42a, and these locks are formed by the ring-shaped portion 45,
The 45 is made with a built-up resilience in the direction of increasing the distance between the two arms 46, 46 and 47, 47.

(F-2. Function) Then, when the cassette carrier 37 is in the eject position, the spring hook holes 42a, 42a of the cassette carrier 37 are provided.
2 is located below the spring hook holes 23a, 23a of the mechanical chassis 17 and on the front side of the mechanical chassis 17, and therefore, the other arm 47 of the toggle springs 44, 44 in this state,
Since the direction of the elastic force acting on the tip of 47 is the direction toward the lower oblique front side, the cassette carrier 37 is urged to move forward.

Further, when the cassette carrier 37 is pushed rearward from the above state and the spring hook holes 42a, 42a move rearward, the toggle springs 44, 44 increase in resilience in the counterclockwise direction in FIG. A position where the spring hooking holes 42a, 42a are located right below the spring hooking holes 23a, 23a of the mechanical chassis 17 as shown by the solid line in FIG. 6 (hereinafter, the position of the cassette carrier 37 in this state). Is referred to as the “click point position”), the direction of the elastic force acting on the tips of the other arms 47, 47 is substantially right below, and the cassette carrier 37 is further moved to two points in FIG. 6, for example. As shown by the chain line, when it comes to the position rearward from the click point position, the direction of the elastic force acting on the tips of the other arms 47, 47 of the toggle springs 44, 44 is the direction toward the rear diagonally downward. , Therefore, transfer it to the cassette carrier 37 in this direction. So that the force is energized. Therefore, in this state, in the cassette carrier 37, due to the elastic force of the toggle springs 44, 44, the guided pins 41, 41 ,.
... is moved rearward while engaging with a, 21a, ..., And the guided pins 41, 41 ,.
When it comes to the rear end of the horizontal portions 21a, 21a, ... Of the 1, ..., The guided pins 41, 41 ,.・ It will be moved toward the loading completion position by engaging with.

Then, the elastic force of the toggle springs 44, 44 is such that when the cassette carrier 37 is located between the eject position and the click point position, the cassette carrier 37 is urged to move forward. When the cassette carrier 37 is located behind the click point position, the cassette carrier 37 acts so as to urge the moving force toward the loading completion position side.

(G. Control Arm) [FIGS. 1, 2, 4, 5] 48 is a control arm supported by the cassette carrier 37, and the magnetic disk cassette 2 is inserted into the cassette carrier 37 by a predetermined amount. In the meantime, the cassette carrier 37 is prevented from moving from the eject position to the loading completion position side, and it is detected that the magnetic disk cassette 2 has been inserted into the cassette carrier 37 by a predetermined amount. It is for releasing and holding the magnetic disk cassette 2, and each part thereof is integrally formed of synthetic resin.

(G-1. Structure) The control arm 48 is formed in a plate shape of a substantially right triangle when viewed from the thickness direction, and has an insertion hole in the corner portion at the rear end thereof.
49 is formed, and a concave portion 50 is formed on a side edge portion of the upper surface of the concave portion 50 which faces the front left oblique direction, and a rear end surface 50a of the concave portion 50 is a pressed portion pressed by the magnetic disk cassette 2. Further, the engaging recess 1 formed in the side surface 15 of the cassette case 3 has a portion 51 between the front end face 48a and the recess 50.
It is an engaging portion that engages with one of 16 and 16 'in a freely releasable manner, and the front end surface of the engaging portion 51 is formed in a substantially arc shape.

The right side surface 48b of the control arm 48 has a front end portion 52 protruding from the remaining portion toward the side opposite to the recess 50, and the protruding portion 52 is an engagement hole formed in the right side wall 19 'of the mechanical chassis 17. It is a lock part that engages with and disengages with 25 freely.

Reference numeral 53 is a stopper protrusion protruding from the lower surface of the control arm 48.

(G-2. Support on Cassette Carrier) The control arm 48 has the insertion hole 49 through which the arm support shaft 43 vertically provided on the cassette carrier 37 is inserted, whereby the top plate 38 of the cassette carrier 37 is inserted. It is rotatably supported by.

Reference numeral 54 denotes a torsion spring, the coil portion 54a of which is externally fitted to the arm support shaft 43, and one arm 54b projects downward from the right end of the contact piece 38a on the right side of the top plate 38 of the cassette carrier 37. The other arm 54
The tip of c is locked in a spring hook hole 56 formed in the center of the control arm 48 near the right side edge.

Therefore, the control arm 48 moves integrally with the cassette carrier 37 and is constantly urged by a turning force in the counterclockwise direction when viewed from above, and its stopper projection is provided while not being pressed in the clockwise direction. By contacting the rear end portion 40'a of the right side receiving edge 40 'of the cassette carrier 37 from the left side with 53, it is prevented from rotating further in the counterclockwise direction. 52 is positioned so as to project laterally from the right side surface of the cassette carrier 37, and the pressed portion 50a is positioned at a position slightly offset from the right side piece 39 'of the cassette carrier 37 to the left side when viewed from the front-rear direction, and The tip of the engaging portion 51 is located on the same plane as the inner surface of the right side piece 39 'of the cassette carrier 37.

(G-3. Function) As described above, the control arm 48 is the cassette carrier 37.
Of the magnetic disk cassette 2 and the magnetic disk cassette 2 are detected by detecting that the magnetic disk cassette 2 has been inserted into the cassette carrier 37, and the magnetic disk cassette 2 is released.
Has the function of supporting.

(G-3-a. Lock function of cassette carrier) When the cassette carrier 37 is in the eject position, the lock portion 52 of the control arm 48 is the engagement hole 25 formed in the right side wall 19 'of the mechanical chassis 17. From the left side,
As described above, since the control arm 48 is positioned so that the lock portion 52 projects from the right side surface of the cassette carrier 37 when it is not pressed in the clockwise direction, as shown in FIG. The lock portion 52 is engaged with the engagement hole 25, whereby the rearward movement of the cassette carrier 37 is prevented.

(G-3-b. Unlocking and Holding Cassette) The magnetic disk cassette 2 is inserted into the cassette carrier 37 while the cassette carrier 37 is in the eject position, and the insertion direction is the cassette case 3 The front end surface 5 of the magnetic disk 12 is directed toward the inner side of the cassette carrier 37 and the center core 14 of the magnetic disk 12 is exposed downward (hereinafter, referred to as “regular insertion direction”).

And the magnetic disk cassette 2 is a cassette carrier
When the cassette case 3 is inserted into the casing 37 in such a direction and the engaging recess 16 'formed on the right end surface 15' of the cassette case 3 comes to a position substantially opposite to the engaging portion 51 of the control arm 48,
The right end of the front end surface 5 of the cassette case 3 is the control arm 48.
It comes into contact with the pressed part 50a and presses it rearward. As a result, the control arm 48 is rotated clockwise as viewed from above, so that the lock portion 52 is disengaged from the engagement hole 25 of the mechanical chassis 17 and the engagement portion 51 of the control arm 48 is engaged with the cassette case 3. The magnetic disk cassette 2 is engaged with the engaging recess 16 'to prevent the magnetic disk cassette 2 from being removed from the cassette carrier 37.

Then, the lock of the cassette carrier 37 by the mechanical chassis 17 is released, and the magnetic disk cassette 2 is held by the cassette carrier 37 via the control arm 48.
The movement of the cassette carrier 37 to the loading completion position is performed with the magnetic disk cassette 2 held in this way.

As described above, the engaging portion 51 of the control arm 48 is in the state where the cassette carrier 37 is in the eject position.
Since the end of the control arm 48 is located on the same plane as the inner surface of the right side piece 39 'of the cassette carrier 37, the engaging portion 51 immediately causes the engaging portion 51 to rotate when the control arm 48 rotates clockwise.
Will be engaged with the engaging recess 16 '. Therefore, the engagement of the control arm 48 with the mechanical chassis 17 and the engagement with the cassette case 3 are surely performed in synchronization, and even if the cassette carrier 37 is unlocked at the eject position, the cassette carrier 37 is released. There is no fear that a malfunction will occur in that the magnetic disk cassette 2 is not held.

When the magnetic disk cassette 2 is inserted into the cassette carrier 37 in a direction other than the proper insertion direction, the positions of the engaging recesses 16 and 16 'do not correspond to the engaging part 51 of the control arm 48, and therefore, The control arm 48 cannot rotate counterclockwise. As a result, the reverse insertion of the magnetic disk cassette 2 is prevented.

(H. Shutter opening arm) [Figs. 1, 2 and 4
FIG. 5] FIG. 57 is a shutter opening arm for moving the shutter 10 of the magnetic disk cassette 2 inserted into the cassette carrier 37 to the open position, and each part thereof is integrally formed of sheet metal material.

The main part 58 of the shutter opening arm 57 has a relatively elongated plate shape when viewed from above, and one end 59 (hereinafter,
It is called the "base end". ) Is formed in a substantially U-shape when the shutter opening arm 57 is viewed from the longitudinal direction, and insertion holes 59a, 59a are formed in both upper and lower pieces of the U-shaped portion. Reference numeral 60 denotes a stopper piece protruding downward from one side edge in the width direction of the main portion 58, and 61 is an action piece protruding downward from the other end of the other side edge in the width direction of the main portion 58, and the tip thereof. The portion 61a extends further than the tip of the main portion 58, and
It is bent in a substantially V shape when viewed from above.

In the shutter opening arm 57, the control arm 48 is inserted by inserting the arm support shaft 43 provided in the cassette carrier 37 into the insertion holes 59a, 59a.
It is rotatably supported coaxially with. The upper and lower pieces of the base end portion 59 of the main portion 58 of the shutter opening arm 57 are control arms.
It is positioned so as to sandwich the base end of 48 from both upper and lower sides.

Reference numeral 62 denotes a torsion spring, the coil portion 62a of which is externally fitted to the arm support shaft 43, one arm 62b is locked to the spring hook portion 55 of the cassette carrier 37, and the other arm 62c.
The tip end of the spring opening piece 57 is engaged with the spring hooking piece 63 that is cut and raised downward in the middle portion of the main portion 58 of the shutter opening arm 57 from the substantially left side.

Thus, the shutter opening arm 57 is always biased by the torsion spring 62 in the counterclockwise direction as viewed from above, and while it is not being pressed in the clockwise direction, Stopper piece 60 is the control arm
The magnetic disk cassette is held at the standby position shown in FIG. 1 by abutting against the 48, and in this state, the tip end portion 61a of the operating piece 61 is inserted into the cassette carrier 37 in the regular insertion direction. It faces the right end of the front end surface 5 of the second cassette case 3.

The shutter opening operation by the shutter opening arm 57 will be described later.

(I. Eject arm) [FIG. 1, FIG. 2, FIG. 4, FIG. 7] 64 is an eject arm that pushes the cassette carrier 37 forward when the eject slider 31 is pushed in, and is horizontal. Is formed to have a substantially L-shape by a lower portion 64a extending in a vertical direction and an upper portion 64b protruding upward from one end portion of the lower portion 64a. Reference numeral 65 denotes a support shaft that is erected at the right end portion of the mechanical chassis 17 near the rear end of the main portion 18, and a position near the other end of the lower portion 64a of the eject arm 64 is rotatable on the support shaft 65. It is supported.

The support shaft 6 of the lower portion 64a of the eject arm 64 is
The portion on the other end side from 5 faces the pressing portion 66 formed at the right end portion of the rear end of the eject slider 31 from the rear,
The upper end of the upper portion 64b of the eject arm 64 faces the rear end of the top plate 38 of the cassette carrier 37 from behind.

The eject arm 64 is an eject slider.
In the state where 31 is not pushed in, its position is not particularly determined, and it comes to any position between the position shown by the solid line in FIG. 1 and the position shown by the chain double-dashed line. The operation of the arm 64 will be described later.

(J. Head support) [FIGS. 1 and 3] 67 is a head support that supports a recording / reproducing magnetic head, and the head support 67 is supported by the mechanical chassis 17 so as to be movable in the front-rear direction. Movable base 68 and the movable base
Head arm 69 supported by 68 so as to be rotatable in a substantially vertical direction
The moving base 68 and the front end of the head arm 69 face each other by a moving means (not shown) so as to move the magnetic disk 12 mounted on the magnetic disk driver 1 in a direction traversing the track. Magnetic heads 70, 70 'are supported at the positions. The head arm 69 is held at the position indicated by the chain double-dashed line in FIG. 3 while the cassette carrier 37 is not at the loading completion position, and when the cassette carrier 37 is moved to the loading completion position, it is interlocked with its movement. In this way, the magnetic head 70 'is moved to the position shown by the solid line in FIG.

(K. Operation) [FIG. 1 to FIG. 3, FIG. 5 to FIG. 7] The loading, ejecting, and recording / reproducing operations of the magnetic disk cassette 2 by the magnetic disk driver 1 configured as described above are as follows. To be done.

(K-1. Initial state) [FIGS. 1 and 2] In the initial state before the magnetic disk cassette 2 is inserted to the predetermined insertion position of the cassette carrier 37, the cassette carrier 37 has its guided pin 41. , 41, ... come to the eject position located at the front ends of the horizontal portions 21a, 21a, ... of the guide grooves 21, 21, ..., and due to the elastic force of the toggle springs 44, 44. It is held at the eject position by urging the moving force forward, and the lock portion 52 of the control arm 48 engages with the engagement hole 25 of the mechanical chassis 17 to move to the loading completion position side. It has been blocked. In the cassette carrier 37, the guided pins 41, 41, ... Have horizontal portions 21 of the guide grooves 21, 21 ,.
While located at a, 21a, ..., It is located at a position slightly higher than the disk drive unit 26.

Also, in this initial state, the shutter opening arm
57 is in the waiting position.

(K-2. Loading of cassette) [Figs. 5 and 6] (k-2-a. Opening of shutter) [Fig. 5 (A)] From the above initial state, the magnetic disk cassette 2 is read.
Is inserted into the cassette carrier 37 in the above-mentioned regular insertion direction and reaches the position shown by the one-dot chain line in FIG. 5 (A),
The front end portion 61a of the action piece 61 of the shutter opening arm 57 is relatively abutted on a portion of the front end surface 5 of the cassette 3 immediately to the right of the right end of the shutter disposing recess 8. Also, from this state, the magnetic disk cassette 2 is further a cassette carrier.
When it is pushed into 37, the cassette case pushes the shutter opening arm 57 to rotate it in the clockwise direction against the elastic force of the torsion spring 62.
The front end portion 61a of the 61 moves along the front end surface 5 of the cassette case 3, and as shown by the solid line in FIG. 5 (A), the cutout portion 9 of the shutter placement concave portion 8 formed in the front end surface 5 is formed.
Enters into the right end portion 9a of the shutter 10 and contacts the right end edge of the continuous portion 10b of the shutter 10.
Will be pressed relatively to the left, so
The shutter 10 is moved toward the open position.

And the magnetic disk cassette 2 is a cassette carrier
When it is pushed further into 37 and reaches the position shown by the chain double-dashed line in FIG. 5 (A), the side edge portion of the cassette case 3 at the right end of the front end portion which is obliquely formed is formed on the upper surface of the control arm 48. When entering the recess 50, the front end face 5 is the control arm.
It comes into contact with the pressed portion 50a of 48 from the front and presses the portion 50a rearward.

In this state, the shutter 10 has been moved to or near the open position where the head windows 6 and 6'of the cassette case 3 are opened, and the engagement recess 16 formed on the right end surface 15 'of the cassette case 3 is also used. ′ Comes from the left side to the position substantially opposite to the tip of the engaging portion 51 of the control arm 48.

(K-2-b. Unlocking cassette carrier, holding cassette) [FIG. 5 (B)] Then, the control arm 48 is pressed by the magnetic disk cassette 2 toward the rear with the pressed portion 50a thereof pushed backward. Since it is rotated in the rotation direction, as shown by the solid line in FIG. 5 (B), the lock portion 52 is disengaged from the engagement hole 25 of the mechanical chassis 17 to the left side, and substantially at the same time as that of the engagement portion 51. The tip end engages with the engaging recess 16 'of the cassette case 3, whereby the lock of the cassette carrier 37 at the eject position is released, and the magnetic disk cassette 2 is transferred via the control arm 48 to the cassette carrier 37. Will be held in.

(K-2-c. Movement of cassette carrier) [Fig. 5 (B), Fig. 6] In the above-mentioned state, the shutter opening arm 57 hits the contact piece 38a of the top plate 38 of the cassette carrier 37 from the front. Located close to or in close proximity.

Therefore, when the magnetic disk cassette 2 is further pushed in from this state, the pressing force acts so as to push the cassette carrier 37, so that the cassette carrier 37 is moved rearward and the control arm 48 has its lock portion 52. By making contact with the right side wall 19 'of the mechanical chassis 17, the clockwise rotation is prevented.

Then, the cassette carrier 37 is shown in FIGS.
When the toggle springs 44, 44 move to the position shown by the two-dot chain line in the figure, that is, the position where they have passed through the rearward direction from the click point position, the toggle springs 44, 44, as shown by the two-dot chain line in FIG. Since the distal end portion 47a of the other arm 47 that is locked to the rear arm 47 comes to the rear of the distal end portion 46a of the one arm 46, the direction of the elastic force acting on the distal end portion of the other arm 47a is substantially rearward. The direction is diagonally downward.

Therefore, when the cassette carrier 37 is pushed to such a position, the magnetic disk cassette 2 will start from here.
Even if you do not press, the cassette carrier 37
Since they are pressed backward and downward by the elastic force of 4, 44, the guided pins 41, 41, ...
While being positioned on the horizontal portions 21a, 21a of the ..., the guide pins 41, 41, ...
a, 21a, ... rear end, in other words, vertical portions 21b, 21b, ...
・ ・ After moving to the upper end, it will be moved downward.

(K-2-d. Crimping of cassette carrier to the loading completion position, etc.) [Fig. 3] When the cassette carrier 37 is moved downward,
The cassette case 3 of the magnetic disk cassette 2 held by the supporting projection 20 provided on the mechanical chassis 17,
The cassette carriers 37 are mounted on the upper end faces of the nozzles 20, ..., This prevents the cassette carrier 37 from moving further downward.

As a result, the cassette carrier 37 remains in the loading completion position shown in FIG. 3 while being pressed downward by the elastic force of the toggle springs 44, 44. That is, the cassette carrier 37 is pressed against the loading completion position.

(K-3. Recording / reproducing) [Fig. 3] When the cassette carrier 37 reaches the loading completion position, the center core 14 of the magnetic disk 12 of the magnetic disk cassette 2 is mounted on the disk mounting plate 29, and The upper end of the rotary shaft 28 of the motor 27 and the drive pin 30 are engaged with the engagement holes 14a and 14b.

When the magnetic disk 12 is mounted on the disk drive unit 26 in this way, the moving base of the arm support 67 is moved.
The magnetic head 70 supported by 68 is relatively inserted into the cassette case 3 through the head window 6 ′ on the lower side of the cassette case 3 and contacts the lower surface of the magnetic sheet 13 of the magnetic disk 12, The head arm 69 is rotated downward so that the magnetic head 70 'is inserted into the cassette case 3 through the head window 6 on the upper side of the cassette case 3 and contacts the upper surface of the magnetic sheet 13.

When a command for recording or reproducing is issued, the motor 27 of the disk drive unit 26 is rotated and the head support 67 causes the magnetic head 70 or 70 'to correspond to the designated track of the magnetic sheet 13. The magnetic head 70 or 70 'is used for recording or reproduction.

(K-4. Removal of magnetic disk cassette) [Fig. 7] Removal of the magnetic disk cassette 2 mounted on the magnetic disk driver 1 is carried out by pushing in the eject slider 31.

When the eject slider 31 moves rearward from the state where the cassette carrier 37 is at the loading completion position, the push-up pieces 34, 34, ... Of the eject slider 31 are ...
The inclined edges 34a, 34a, ... of the cassette carrier 37 push the guided pins 41, 41, ... of the cassette carrier 37 substantially obliquely upward and rearward, so that the cassette carrier 37 is pushed upward.
As a result, the magnetic disk 12 is detached from the disk mounting plate 29 and the elastic force of the toggle springs 44, 44 increases. And, as shown by the solid line in FIG. 7, the guided pins 41, 41, ...
The upper part 64b of the eject arm 64 pressed by the eject slider 31 at the same time when it comes to the upper ends of the vertical parts 21b, 21b, ... Therefore, when the eject slider 31 is pushed in by a predetermined amount, the eject arm 64 presses the cassette carrier 37 at least until the cassette carrier 37 passes the click point position forward. Therefore, the cassette carrier 37
Is returned to the eject position by the eject slider 31 and the eject arm 64, or until the eject point 31 passes the click point position forward.
After being returned by the etc., it is further returned to the eject position by the elastic force of the toggle springs 44, 44.

Then, when the cassette carrier 37 returns to the eject position, the lock portion 52 of the control arm 48 faces the engagement hole 25 of the mechanical chassis 17, so that the control arm 48 is rotated counterclockwise by the rotational force biased by the lock arm 52. Rotate in the direction to lock part 52
Are engaged in the engagement holes 25, thereby allowing the cassette carrier
37 is locked in the eject position.

At the same time, the engaging portion 51 of the control arm 48 is laterally disengaged from the engaging recess 16 'of the cassette case 3, so that the magnetic disk cassette 2 is released from being held by the control arm 48. Is pushed back by the shutter opening arm 57, and the action piece 61 of the shutter opening arm 57 escapes to the right, so that the shutter 10 is returned to the closed position by the moving force biased by this.

(G. Effects of the Invention) As is apparent from the above description, the cassette loading device of the present invention uses a recording medium cassette having a cassette case in which a recording medium is housed and an engaging portion is formed on the outer surface. , Between the eject position where the recording medium cassette is detachably inserted and the recording medium cassette is inserted and removed, and the loading completion position which is closer to the cassette insertion direction and closer to the thickness direction of the cassette than the eject position. The cassette carrier includes a moving cassette carrier, a support member having a guide portion that guides the moving direction of the cassette carrier, and a retracting unit that retracts the cassette carrier to the loading completion position. When the cassette carrier is in the eject position, the cassette carrier Is blocked from moving to the loading complete position When the cassette has been inserted to a predetermined insertion position of the cassette carrier, the above detection is released by detecting it and the recording medium cassette is held in the cassette carrier and the cassette carrier is moved to the loading completion position by the retracting means. The loading device is rotatably supported by the cassette carrier and engages with the engaging portion of the support member when the cassette carrier is in the eject position to prevent the cassette carrier from moving toward the loading completion position. A control member is provided, which is pressed by the recording medium cassette inserted into the cassette carrier to move in the direction for releasing the blocking and engages with the engaging portion of the recording medium cassette.

Therefore, according to the present invention, the prevention of the movement of the cassette carrier in which the recording medium cassette is not inserted from the eject position, the detection of the insertion of the recording medium cassette in the cassette carrier, and the release of the above-mentioned inhibition performed accordingly. Also, since the inserted recording medium cassette can be held in the cassette carrier by one member, the above-mentioned operations or controls need not be performed with special means for taking necessary timing between them. , Can be reliably executed at a predetermined timing, and thereby the reliability of the operation can be extremely improved.
In particular, the lock release of the cassette carrier by the control member is performed on condition that the control member engages with the recording medium cassette, so that the recording medium cassette is always held when the cassette carrier is moved toward the loading completion position. Therefore, the cassette carrier is dropped to the loading completion position, that is, the recording medium cassette is not held, or the recording medium cassette is not completely inserted into the cassette carrier. Therefore, it is possible to reliably prevent damage to the head of the recording / reproducing unit, the recording medium cassette, and the like, which are caused by the empty drop of the cassette carrier. Since the mechanism for performing the above-mentioned plurality of operations or controls can be extremely simplified, the number of parts, the number of assembly steps, the trouble of parts management, etc. can be greatly reduced, and the cost can be greatly reduced. be able to.

In the above embodiment, the control member cannot engage with the cassette case when the recording medium cassette is inserted into the cassette carrier in an orientation other than the proper orientation. In this case, even if the control member is pressed in the direction to release the engagement with the support member, it is prevented from rotating in that direction, and in this case, the movement of the cassette carrier to the loading completion position is prevented. Therefore, the reverse insertion prevention mechanism for the cassette can be omitted.

Although the cassette loading device of the present invention is applied to the cassette loading device of the magnetic disk driver in the above embodiment, the present invention is not limited to such an example, and the recording medium cassette can be detachably attached. Of the cassette carrier and the cassette carrier that moves between the eject position where the recording medium cassette is inserted and removed and the loading completion position that is closer to the cassette insertion direction and closer to the thickness direction of the cassette than the eject position. The present invention can be applied to various cassette loading devices including a support member having a guide portion for guiding the moving direction and a retracting means for retracting the cassette carrier to the loading completion position when the recording medium cassette is inserted into the cassette carrier. .

[Brief description of drawings]

1 to 8 show an example in which the cassette loading device of the present invention is applied to a cassette loading device in a magnetic disk driver. FIG. 1 is a plan view of the magnetic disk driver, and FIG. 2 is a magnetic disk. FIG. 3 is a side view showing the driver with a part cut away, FIG. 3 is a sectional view taken along the line III-III of FIG. 1 in a state where the cassette carrier is at the loading completion position, and FIG. 4 is an exploded view of the cassette loading device. 5 is a horizontal sectional view of the main part showing the cassette loading operation in order from (A) to (B), and FIG. 6 is a side view of the main part showing the cassette loading operation, and FIG. Is a side view of an essential part for explaining the cassette eject operation, FIG. 8 is a perspective view of a magnetic disk cassette, and FIGS. 9 and 10 are conventional cassette loaders. Shows an example of a grayed apparatus 9
FIG. 9 (A) is a plan view showing a state before the insertion of the magnetic disk cassette into the cassette carrier is completed, and FIG. 9 (B).
FIG. 10 is a plan view showing a state where the magnetic disk cassette is loaded, and FIG. 10 is a schematic side view showing a part of the magnetic disk cassette. Explanation of symbols 2 ... Recording medium cassette, 3 ... Cassette case, 17 ...
… Supporting member, 21 …… Guide part, 37 …… Cassette carrier,
48 ... Control member

Claims (1)

(57) [Claims] 1. A recording medium cassette having a cassette case in which a recording medium is housed and an engaging portion is formed on an outer surface, the recording medium cassette is detachably inserted, and the recording medium cassette is inserted and removed. A support having a cassette carrier that moves between an eject position at which the operation is performed and a loading completion position that is closer to the cassette insertion direction and closer to the thickness direction of the cassette from the eject position, and a guide portion that guides the movement direction of the cassette carrier. A member and a retracting means for retracting the cassette carrier to the loading completion position, and when the cassette carrier is in the ejection position, the movement of the cassette carrier to the loading completion position is blocked, and the recording medium cassette is set to the predetermined position of the cassette carrier. When it is inserted up to the insertion position of the And a recording medium cassette is held in the cassette carrier and the cassette carrier is moved to the loading completion position by the retracting means.The cassette loading device is rotatably supported by the cassette carrier and the cassette carrier comes to the eject position. When the recording medium cassette is inserted into the cassette carrier, the blocking is released by engaging with the engaging portion of the supporting member to prevent the cassette carrier from moving toward the loading completion position. A cassette loading device provided with a control member that moves in a direction to engage with an engaging portion of a recording medium cassette.