KR20090124776A - Magnatic player - Google Patents

Abstract

PURPOSE: A magnetic reproducer is provided to smoothly perform cassette loading and prevent the case of a cassette from being damaged by a detection member. CONSTITUTION: A magnetic reproducer(1) comprises a cassette loading unit(3) and a detection member. The detection member detects whether recording is possible or not. The cassette loading unit charges a cassette within a cassette housing(5) in a fixed state. The cassette loading unit discharges the cassette which is operated in a mounting position to the outside of the cassette housing by handling an eject handling member. The magnetic reproducer comprises additionally an elastic device and a holding device. The elastic device transfers the detection member to a fixed position. The holding unit keeps the detection member in the outer position of a cassette channel in order not to contact the cassette.

Description

Magnetic playback device {MAGNATIC PLAYER}

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The present invention relates to a magnetic recording and reproducing apparatus such as a VTR.

By inserting the cassette in a predetermined state into a conventional cassette housing, the cassette is fitted to the rail side of the supply side rail and the winding side rail to be a mounting position, and the cassette at the mounting position is operated outside the cassette housing by operating with an eject operation body. When a shielding piece is present in the cassette loading mechanism which is discharged to the non-mounting position and the recording preventing recess of the cassette at the mounting position, one end portion is prevented from penetrating into the recess by the shielding portion to be in a recordable state. When the shielding piece is not present, a magnetic recording / reproducing apparatus having recordable and non-detectable members having one end penetrating into the recess and making it impossible to record is known, for example, from Japanese Patent Application Laid-Open No. 61-31389. It is.

In the conventional magnetic recording and reproducing apparatus, in the non-detectable operation, if the shielding piece is not present in the cassette for preventing the recording, the detection member rotates in one direction, so that the recording circuit operation switch is turned off so that the recording circuit does not operate. If the shielding piece is not present, and the shielding piece is present, the detection member rotates in the other direction, so that the recording circuit operation switch is turned on so that the recording circuit is operated to become a recordable state.

That is, the detection member has an inclined surface, and the cassette is in contact with the inclined surface in accordance with the movement of the cassette in the vertical direction during the loading of the cassette, so that the detection member is rotated so that the detection member is always detected when the cassette is loaded. The member abuts the cassette, the detection member is hindered by the cassette movement during the cassette loading, the cassette loading is not smooth, and there is a problem that a wound occurs due to the contact of the detection member on the cassette case.

The present invention has been made in view of the above circumstances, so that the detection member does not contact the cassette at the time of the cassette loading, the cassette is loaded smoothly, and the case of the cassette is provided so as not to be injured by the contact caused by the detection member. It is.

In order to solve the above-mentioned problems, the magnetic recording and reproducing apparatus of the present invention inserts a cassette into a cassette housing in a predetermined state so that the cassette is fitted into the rails of the supply side rail and the winding side rail to be the mounting position and is ejected. When a shielding piece is present in the cassette loading mechanism for discharging the cassette in the mounting position to the outside of the cassette housing by operating the operating body and in the non-mounting position, and the shielding piece in the write-protecting recess of the cassette in the fixing position, The shielding piece is provided with a recordable state, a non-detection detection member, etc. which prevents the intrusion into the recess portion and makes a recordable state. When the shielding member does not exist, one end portion penetrates into the recess portion and becomes impossible to record. In one magnetic recording and reproducing apparatus, the detecting member is moved to a predetermined position to perform the detecting operation. Holding means and a holding means for holding the detection member outside the cassette moving passage so as not to contact the cassette against the holding force of the biasing means when the cassette is loaded, and to release the holding after the cassette loading is completed. And the releasing operation of the holding means is interlocked with the actuating mechanism which is subsequently operated after the completion of the cassette loading.

At the time of cassette loading, the detection member is held in a position outside the cassette movement passage by the holding means to resist the holding force of the holding means, so that the detection member does not contact the cassette.

After the cassette loading is completed, the holding by the holding means is released, and the detection member is moved to a predetermined position only by the holding force of the means to detect whether or not recording is possible.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

In FIGS. 1 to 3, 1 is a magnetic lock reproducing apparatus, and in the chassis 2, the cassette loading mechanism 3 loads the cassette 4 into the cassette housing (cassette charging section) 5 in a predetermined state, thereby supplying the cassette 4 to the supply side and winding up. The cassette 4 in the mounting position is discharged to the outside of the cassette housing 5 by unloading the cassette 4 in the mounting position by fitting it to the mounting shafts 6a and 7a of the side rails 6 and 7, and setting the mounting position. Is to position.

The cassette housing 5 is mounted by sliding material in the front-rear and up-down directions between the side plates 8 and 9 which are mounted upright on both sides of the front part in the front and rear directions of the chassis 2 as shown in FIGS. 1 to 4. It is.

The cassette housing 5 is erected on both sides of the bottom plate 5a on which the cassette 4 can be placed to form side plates 5b and 5c, and the two side plates 5b and 5c are connected by 5d between the connections.

The cassette housing 5 has guide pins 10 and 11 protruding from the front and rear portions of the both side plates 5b and 5c. The guide holes 10 and 11 are parallel to the both side plates 8 and 9, respectively. The cassette housing 5 is supported by the said both side plates 8 and 9 by being slidably engaged in the adjacent guide holes 12 and 13.

The guide holes 12 and 13 form an inverted L-shape formed by extending the vertical holes 12b and 13b downward toward the rear ends of the horizontal holes 12a and 13a.

To the guide pins 10 and 10 of both the side plates 5b and 5c of the cassette housing 5, the power transmission Chichigig 15 and 16 are connected through the hooks 14.

The gear transmission 15 for power transmission of one side plate 8 side (right side in FIG. 1) is formed in the outer side surface of this one side plate 8. As shown in FIG.

The power transmission vehicle mechanism 15 of this one has a worm 17, a worm wheel 18 to be engaged with the worm 17, and first and second gears 19 coaxially rotating with the worm wheel 18 as shown in FIGS. And a fourth gear 22 integrally formed with the second gear 20 and integrally formed with a third gear 21 meshing with the first gear 19 over a predetermined angle on a peripheral portion of the outer surface thereof; And a fifth gear 23 and the like engaged with the gear 22, and the fourth gear 22 is connected to the guide pin 10 on all sides of the one side plate 8 through the ribs 14.

The power transmission gear mechanism 16 on the other side plate 9 side (left side in the first diagram) is formed on the outer side surface of the other side plate 9.

The other power transmission gear mechanism 16 includes a first gear 24 coaxially rotating with the fifth gear 23 of the one-way power transmission gear mechanism 15 and a second gear 25 meshing with the first gear 24. The 2nd gear 25 is connected to the all-side guide pin 10 of the said other side plate 9 through the said ribs 14.

When the cassette 4 is inserted into the cassette housing 5 and placed in a predetermined state and loaded in the state indicated by the solid line in Figs. 2 and 3, the detection switch (not shown) detects this charging, so that the capstan motor 26 is driven to rotate. The rotational force is transmitted to the one power transmission toothing mechanism 15 and the other power transmission toothing mechanism 16 through the first power transmission mechanism 27, the rotation power transmission switching mechanism 28, and the second power transmission mechanism 29.

Accordingly, in the state shown by the solid line in FIGS. 2 and 3, the cassette housing 5 moves in the horizontal direction along the horizontal portions 12a and 13a of the guide holes 12 and 13 integrally with the cassette 4, and then the vertical portion 12b, Moving downwardly along 13b vertically, the cassette 4 is brought into the mounting position as indicated by the solid two-point line in FIGS. 2 and 3.

In this mounting position, the rail 6a of the said supply side rail stand 6 and the winding side rail stand 7 is provided in the center fitting hole (not shown) of the supply side tape winding body and the winding side tape winding body accommodated in the case 4a of the cassette 4. , 7a is fitted.

Moreover, the opening / closing lid (not shown) formed by the opening-and-closing material in the rear end gripping surface of the case 4a of the said cassette 4 is opened in the mounting position of this cassette 4. As shown in FIG.

In the mounting position of the cassette 4, the tape guide inclined foam 30, the tape guide vertical foam 31, and the capstan 32 were respectively disposed at the inner side of the tape loop through the bottom cutout hole (not shown) of the case 4a. It fits in relatively.

On the other upper surface of all the chassis 2, the recording impossible detection member 33 is formed.

When the shielding piece 34a (refer to FIG. 12) is present in the recording preventing recess 34 formed on the front surface of the case 4a of the cassette 4 in the mounting position, the detection member 33 prevents the intrusion into the recess 34 and records it. When the shielding piece 34a is not present, the tip end penetrates into the recess 34 to make the recording impossible.

The detection member 33 has a substantially L-shape in plan view, and the middle portion thereof is condensed on the upper surface of the sash 2 by a predetermined angle range.

One end of the detection member 33 has a vertical wall 33a vertically upright, and protrudes 33b toward the horizontal rear at the upper end of the vertical wall 33a and generally in the center thereof.

The protrusion 33b penetrates the shielding piece 34a in contact or in the recess 34.

At the other end of the detection member 33, a engagement pin 33c protrudes toward the vertical lower side.

The engagement piece 33c extends through the hole 2a of the sash 2 to the lower surface side of the sash 2 through a moving material, and is engaged with one of the contact springs 35a and 35b of the recording circuit operation switch 35.

The recording circuit operation switch 35 is provided on the lower surface of the chassis 2, and has a pair of contact springs 35a and 35b which contact each other and are separated from each other by their elastic force.

These contact springs 35a and 35b are electrically connected to a recording circuit (not shown) via lead wires 36a and 36b.

When the contact springs 35a and 35b are in contact with each other in response to the elastic force, the recording circuit operates to become a recordable state. When the contact springs 35a and 35b are separated from each other by the elastic force, the recording circuit operates. It becomes unrecordable.

The contact springs 35a and 35b also serve as holding means for moving the detection member 33 to a predetermined position so as to perform the detection operation.

That is, the detection member 33 is in the direction of approaching the projecting piece 33b to the side of the write preventing portion 34 side of the case 4a of the cassette 4 in the mounting position by the elastic force of the contact springs 33a and 35b (counterclockwise in the fourth). It is hard to move.

The intermediate portion of the detection member 33 protrudes 33d of the second engagement pieces protruding in the horizontal rear.

This second engagement piece 33d is engaged with the holding means 37. The holding means 37 holds the detection member 33 outside the cassette movement passage so as not to contact the cassette 4 by resisting the holding force of the contact springs 35a and 35b during cassette loading, and release the holding after the cassette loading is completed. It is.

The holding means 37 is composed of a sliding plate 39 of the rotational speed switching mechanism (operating mechanism) 38.

The rotational speed switching mechanism 38 is for switching the rotational speeds of the supply side and the winding side bands 6 and 7 by changing the gear ratio, and the high-speed gear 40 and the low-speed gear 41, etc. according to the sliding of the sliding plate 39. Alternatively, it meshes with the gear (not shown) of the first power transmission mechanism 42.

The engaging projection 39a of the distal end portion of the sliding plate 39 is abutted with the second engaging piece 33d of the detecting member 33.

In addition, the sliding plate 39 is slid in the right direction in FIG. 5, so that the engagement protrusion 39a abuts on the second engagement piece 33d, and the detection member 33 resists the holding force of the contact springs 35a and 35b. It is held in the clockwise rotation limit position.

Further, the sliding plate 39 slides in the left direction in the fifth degree, so that the holding is released, and the detection member 33 rotates counterclockwise in the fifth degree with the holding force of the contact springs, 35a and 35b.

In FIG. 5, 42 is a tape loading mechanism, 43 is a brake key mechanism for reactivating the rails 6 and 7, 44 is a pinch roller driving mechanism for folding the pinch roller 45 to a capstan 32, 46 is a cam motor, 47 is The cap plate is connected to the cam motor 46 via a third power transmission mechanism 48.

Next, the operation of the magnetic recording and reproducing apparatus of the present invention having the above configuration will be described.

In the cassette unloading state, the rotational speed switching mechanism 38 is in a neutral state, and the low-speed gears 40 and 41 are not engaged with the gears of the first power transmission mechanism 27.

When the rotational speed switching mechanism 38 is in a neutral state, the sliding plate 39 is in a state of moving to the right in FIG. 5, and the engaging protrusion 39a abuts against the second engaging piece 33d of the detecting member 33, and the detecting member 33 Is held at the clockwise rotational limit position, that is, at the position outside the moving passage of the cassette 4 at the time of cassette loading, as shown in FIG. 5, resisting the holding force of the contact springs 35a and 35b.

In this state, when the cassette 4 is inserted into the cassette housing 5 to the small collection position, the detection switch (not shown) is detected, and the capstan motor 26 rotates in one direction based on this detection signal. The rotational force of is transmitted to the power transmission gear mechanisms 15 and 16 of the cassette loading mechanism 3 through the first power transmission mechanism 27 and the second power transmission mechanism 29, and the cassette loading mechanism 3 is driven on the loading side so that the cassette 4 is driven. It is loaded and placed in the mounting position.

When this cassette loading is completed, this detection switch (not shown) is detected, and the rotation drive of the capstan motor 26 is stopped in accordance with this detection signal, and the drive of the cassette loading mechanism 3 is stopped.

When the rotational drive of the capstan motor 26 stops, the detection switch detects this, and based on the detection signal, the cam motor 46 rotates in one direction, and the rotational force is transmitted to the cam plate 47 through the third power transmission mechanism 48. The cam plate 47 rotates in one direction, and according to this rotation, the rotational force transmission switching mechanism 28 is in a state in which rotational force transmission is impossible, and the sliding plate 39 of the rotational speed switching mechanism 38 slides in the left direction during the fifth degree to move in a low-speed rotational transmission state, respectively. After switching, the rotational drive of the cam motor 46 is stopped to enter the standby state.

At the time of cassette loading, the detecting member 33 is held by the holding means 37 in a state located outside the cassette moving passage as in FIG. 5, so that the detecting member 33 is not in contact with the cassette 4 at all. While the loading operation of 4 is performed smoothly, the case 4a of this cassette 4 is not damaged.

On the other hand, as described above, after the cassette loading is completed, the rotational speed switching mechanism 38 is operated so that the sliding plate 39 moves to the left side in the fifth degree, so that the engaging projection 39a falls from the second engagement piece 33d of the detection member 33. The holding by the holding means 37 is released and the detection member 33 is in a state capable of rotating counterclockwise in the fifth degree by the holding force of the contact springs 35a and 35b.

In this state, if the shielding piece 34a is present in the write-protection recess 34 of the case 4a of the cassette 4 in the mounting position, the projecting piece 33d of the detection member 33 abuts on the shielding piece 34a. As shown in Fig. 2, since the intrusion into the concave portion 34 of the protruding piece 33b is prevented, the detection member 33 can no longer rotate clockwise during the eighth degree.

In this state, the contact springs 35a and 35b of the recording circuit switch 35 are connected to each other by the first engagement piece 33c of the detection member 33 as shown in FIG. The recording circuit operates to become a recordable state.

In addition, if the shielding piece 34a does not exist in the write-protection tip 34 of the case 4a of the cassette 4, the protruding piece 33b of the detection member 33 penetrates into the tip 34, so that the detection member 33 holds the holding force of the contact springs 35a and 35b. Rotates counterclockwise in FIG. 5 to become a state shown in FIGS. 10 and 13.

In this state, the contact springs 35a, 35b of the recording circuit switch 35 are turned off from each other by their elastic force as shown in the eleventh illustration, and the recording circuit does not operate and becomes impossible to write.

In the above embodiment, the releasing operation of the holding means is interlocked with the rotational speed switching mechanism 38, but the present invention is not limited to this, and may be interlocked with the tape loading mechanism 42, the brake key mechanism 43, or the pin tooth roller drive mechanism 44.

As described above, the present invention inserts the cassette into the cassette housing in a predetermined state, thereby inserting the cassette into the cassette housing in a predetermined state so that the cassette is fitted to the rails of the supply side rail and the winding side rail to be in the mounting position and is ejected. A cassette loading mechanism for discharging the cassette at the mounting position to the outside of the cassette housing by operating the operating body, and one end of the cassette loading mechanism when the shielding piece is present at the write-protecting recess of the cassette at the mounting position. When the shielding piece supports the intrusion into the recess portion to make the recording state, and when the shielding member is not present, the recording is made in which the one end penetrates into the recess portion and becomes impossible to record. In the reproducing apparatus, the detecting member is placed at a predetermined position for detecting the motion. Holding means for moving, and holding means for holding the detection member outside the cassette moving passage so as not to contact the cassette by resisting the holding force of the holding means during cassette loading, and releasing the holding after the loading of the cassette is completed. And the releasing operation of the holding means is interlocked with the actuating mechanism which is subsequently operated after the completion of the cassette loading, so that the detection member does not contact the cassette at the time of the cassette loading, and the cassette loading is smoothly performed. At the same time, when the detection member is brought into contact with the case of the cassette, it is possible to reliably detect the impossibility of recording.

1 magnetic recording and reproducing apparatus 3 cassette loading mechanism

4: cassette 5: cassette housing

6: Supply side rail band 6a: Rail shaft

7: winding side rail band 7a: rail side

33: Recordable, impossible detection member 34: Record preventing portion

34a: shielding piece 35: switch

35a, 35b: contact spring 37: holding means

38: rotation speed switching mechanism

Claims (1)

By inserting the cassette 4 into the cassette housing 5 in a predetermined state, the cassette is fitted to the rail side of the supply side rail stand 6 and the winding side rail stand 7 to be a mounting position and the eject operation body is operated. By discharging the cassette 4 at the mounting position to the outside of the cassette housing 5 to shield the cassette loading mechanism 3 at the non-mounting position and the recording preventing portion 34 of the cassette at the mounting position. When the piece 34a is present, one end is prevented from penetrating into the groove by the shielding piece, and when the shielding piece is not present, a portion of the piece 34a penetrates into the groove and cannot be recorded. In the magnetic recording and reproducing apparatus provided with the impossibility detecting member 33 and the like, the gripping means for moving the detecting member 33 to a predetermined position to cause the detection motion and the image at the time of cassette loading. It is provided with holding means (37) for holding the detection member (33) in a position outside the cassette moving passage so as not to contact the cassette by resisting the holding force of the fingering means, and after the cassette loading is finished. And a releasing operation of the holding means is interlocked with an actuating mechanism which is subsequently operated after completion of the cassette loading.

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