JP2876368B2 - Recording or playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording or reproducing apparatus in which a claw of a reel base is engaged with an engaging groove of a reel by mounting a cassette.

[0002]

2. Description of the Related Art Conventionally, in a recording / reproducing apparatus such as a VTR, when a phase of an engaging groove of a reel of a cassette and a claw of a reel stand do not coincide with each other when a cassette is mounted, a spring is first moved toward the cassette. And the claw portion of the reel base, which has been urged upward, is pressed down by the reel to stand by. Then, the tape is pulled out for recording and reproduction while the reel base of the apparatus is fixed, and the reel is rotated by the tension of the tape, so that the phase of the claw portion of the reel base and the engagement groove of the reel match. At the time of the alignment, the claw portion of the reel base is raised by the spring force, so that power can be transmitted between the reel and the reel base.

[0003]

However, in the conventional recording or reproducing apparatus, the reel rotates, that is, the tape is rotated until the power can be transmitted between the reel and the reel base as described above. Must be moved by a fixed amount, even if the reel base of the device is fixed and the tape is wound or pulled out, the reel on the cassette side will rotate until the reel aligns with the claw when the tape is pulled out after the cassette is mounted. to continue. Then, since the tape moves correspondingly, the mounting position of the tape is changed before and after the cassette is attached and detached, and there is a problem that the continuous recording cannot be performed unless the tape is caught. .

In view of such circumstances, the present invention is directed to a recording or reproducing apparatus which eliminates a change in a tape mounting position before and after a cassette is attached and detached, and in particular, enables a splicing recording to be easily performed without cueing. The purpose is to provide.

[0005]

SUMMARY OF THE INVENTION The present invention has a shaft portion, a claw portion movably inserted into the outer periphery of the shaft portion, and an urging member for urging the claw portion to move upward. By mounting a cassette having a reel base and rotatably accommodating a reel around which a tape is wound at a predetermined position, the claw portion of the reel base is engaged with an engagement groove of a shaft insertion hole provided in the reel. in the recording or reproducing apparatus is configured to engage a lock member driving mechanism for switching selectively between the locked state and the unlocked state of the reel by locking members provided on the cassette, the reel stand A reel base brake mechanism for selectively switching between a fixed state and a fixed release state, and when the cassette is mounted, the reel is driven by the lock member driving mechanism via the lock member. In the locked state, the fixing of the reel base by the reel base brake mechanism is released, and the reel base is rotated by at least one phase at which the claw portion and the engagement groove are engaged. .

[0006]

According to the present invention, before the tape is pulled out after the cassette is mounted, the reel on the cassette side is fixed and the reel base of the apparatus is rotated so that the reel is not rotated, that is, the tape is moved. The power can be transmitted to the reel base without any power. Thus, it is possible to eliminate a change in the tape mounting position before and after the cassette is attached and detached, and it is possible to reliably and easily perform the joint recording without cueing.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a recording or reproducing apparatus according to the present invention will be described below with reference to FIGS. FIG. 1 shows a configuration example of a cassette to be mounted. In the figure,
1 is a cassette, 2 is a take-up reel, and 3 is a supply reel. At the center of each of the take-up reel 2 and the supply reel 3, an insertion hole having engagement grooves 2a, 3a is formed.
Ratchets 2b and 3b are formed on the outer circumference of the take-up reel 2 and the supply reel 3, respectively. Reference numeral 4 denotes a tape wound around the take-up reel 2 and the supply reel 3, and reference numeral 5 denotes a lock member arranged to be slidable in the vertical direction in the figure, and is urged upward by a spring 6. The pair of claws 5 a of the lock member 5 are in contact with the take-up reel 2 and the ratchets 2 b, 3 b of the supply reel 3. Reference numeral 7 denotes a release pin on the apparatus side, which engages with the lock member 5 when the cassette 1 is mounted and moves downward, thereby moving the lock member 5 against the elasticity of the spring 6. The claw 5a is detached from the ratchets 2b, 3b.

FIG. 2 shows an example of the configuration of a main part of the apparatus according to the present invention in which the cassette 1 is mounted. In the figure,
Reference numeral 8 denotes a reel lock release lever pivotally supported via a support shaft 8a. In a normal state, the release pin 7 implanted at one end of the reel lock lever is moved upward by an elastic force of a spring 9 to stand by. State. Reference numeral 10 denotes a locking solenoid, which causes the reel lock release lever 8 to turn left around its support shaft 8a by a suction operation, thereby causing the claw 5a of the lock member 5 to be disengaged from the ratchets 2b, 3b as described above. The lock of the take-up reel 2 and the supply reel 3 is released.

Reference numeral 11 denotes a supply reel motor. As shown in FIG. 3, a supply reel base 12 is press-fitted to a rotating shaft 11a. The shaft portion 12a of the supply reel base 12 has a hexagonal cross section, and fits into a hexagonal cross section hole formed in the reel claw 13 urged upward by a spring 17. As a result, the reel claw 13 is
The shaft 12a can rotate integrally with the shaft 12a in a state where the shaft 12a can move up and down. The projection 13a of the reel claw 13 engages with the engagement groove 3a of the supply reel 3 in a specific phase when the cassette 1 is mounted, and thereby the power supply between the supply reel 3 and the supply reel base 12 is moved. It will be in a transmittable state. In phases other than the above-described specific phase, the reel claw 13 is only pushed down when the cassette is mounted (FIG. 3), and the power cannot be transmitted as described above.

In FIG. 2, 14 is a take-up reel motor, 15 is a take-up reel base, and 16 is a reel claw. The reel claw 16 has a projection 16a. Further 18
Is a brake lever rotatably supported via a support shaft 18a. The brake lever 18 has a protruding piece 18b that can abut a ratchet 12b formed on the outer periphery of the supply reel base 12. 19 is the brake lever 1
A spring imparting a right-handed turning property in FIG.
Is a brake solenoid, and when the brake solenoid 20 is released, the brake lever 18 is turned clockwise by the elastic force of the spring 19, whereby the supply reel base 12 is fixed. In the above case, the lock solenoid 10, the supply reel motor 11,
The operation of the take-up reel motor 14 and the brake solenoid 20 is controlled by a control circuit 21.

The recording or reproducing apparatus according to the present embodiment is configured as described above, and its operation will be described below. FIG. 4 shows a flowchart of the operation of the apparatus.
Take-up reel 2 and supply reel 3 of cassette 1 to be mounted
Are locked by the lock member 5. The mounting of the cassette 1 is detected by a switch (not shown).
At this time, the locking solenoid 10 has been released,
The reel lock release lever 8 is rotated by the elastic force of the spring 9, whereby the lock member 5 keeps the take-up reel 2 and the supply reel 3 locked. In particular, the take-up reel 2 and the supply reel 3 and the take-up reel base 15 and the supply reel base 1
If the phases do not coincide with each other, the take-up reel 2 and the supply reel 3 push down the reel claws 16 and the reel claws 13, respectively, by mounting the cassette 1 as described above. In this state, the brake solenoid 20 is sucked, the brake lever 18 is rotated, and the brake lever 1
8 makes the supply reel table 12 rotatable. The supply reel base 12 is rotated by the supply reel motor 11 in the counterclockwise direction in FIG.

As described above, the supply reel table 12 rotates at least 1/6. However, in this case, the supply reel 3 cannot be rotated because the supply reel 3 is fixed by the lock member 5. Therefore, while the supply reel base 12 rotates １ ／, the reel claw 13 that rotates together with the supply reel base 12
Of the projection 13a and the engagement groove 3a of the supply reel 3 coincide with each other. When the phase coincides, the reel claw 13 is raised toward the supply reel 3 by the elastic force of the spring 17, whereby the engagement groove 3a It fits. When the reel claw 13 and the engagement groove 3a are engaged, power can be transmitted between the supply reel 3 and the supply reel base 12. Further, at this time, the rotation of the supply reel base 12 is regulated by the fixed supply reel 3, and further rotation is impossible.

Next, the brake solenoid 20 is released, thereby fixing the supply reel base 12. The tape 4 is pulled out by a loading mechanism (not shown) in a state where the take-up reel 2 and the supply reel 3 unlocked by the lock member 5 are rotatable by sucking the lock solenoid 10. In the state where the supply reel 3 on the fixed side is fixed without rotating,
Since the tape 4 is pulled out only from the take-up reel 2, unnecessary movement of the tape 4 can be eliminated.

In the above case, even if the time for rotating the supply reel table 12 is not set within a predetermined time range, the supply reel table 12 is rotated by a predetermined angle by, for example, an output of a rotation detection mechanism for the supply reel table 12. You may do so. Further, as described above, the supply reel table 12 is in a state where power can be transmitted to the supply reel 3 during the 1/6 rotation and its rotation is restricted. You may make it rotate. Further, the rotation direction of the supply reel base 12 may be rotated clockwise in addition to the counterclockwise direction as described above. Further, even when the supply reel table 12 and / or the take-up reel table 15 are rotated, the same operation and effect as in the above embodiment can be obtained. On the other hand, at the time of tape take-up, the supply reel table 12 is fixed in the same manner as that at the time of pull-out, so that the movement of the tape before and after the cassette is attached and detached is also prevented in this case. Can be
By eliminating the movement of the tape before and after the attachment / detachment of the cassette, joint recording becomes possible, and thus operability can be improved.

Next, a second embodiment of the recording or reproducing apparatus according to the present invention will be described. FIG. 5 shows a cassette used in the second embodiment of the present invention. In the figure, 1
Is a cassette, 2 is a take-up reel, 3 is a supply reel, 4 is a tape, and 5 is a lock member. FIG. 6 shows a configuration example of a main part of an apparatus to which the cassette 1 is mounted. In the figure, 22 is a cassette holder, 23 is a link mechanism 24
Is a reel chassis that supports the cassette holder 22 so as to be able to move obliquely up and down through the reel chassis. The supply reel base 12 and the take-up reel base 15 are installed on the reel chassis 23. FIGS. 7 and 8 show a configuration example of the supply reel base 12 (note that the configuration of the take-up reel base 15 is also applicable). Basically the same). The reel claw 13 is inserted through the shaft portion 12a of the supply reel base 12 via the spring 17, and is fixed by the cap 25 to be integrally assembled. The reel claw 13 can move up and down along the shaft portion 12a, but is urged upward by the spring 17.

FIG. 9 shows a supply reel 3 and a reel claw 1.
3 is shown. In the drawing, an engagement groove 3a and a projection (crest) 3c are formed on the supply reel 3 so as to engage with the projection 13a of the reel claw 13. When the two are engaged, the supply reel 3 and the supply reel base 12 are in a state where power can be transmitted. Now, the cassette 1 is mounted on the reel chassis 23 via the cassette holder 22. That is, the cassette holder 22 has a position (FIG. 6) where the cassette 1 can be inserted and removed, and the tape 4 for recording and reproduction.
It is configured to move up and down diagonally between positions where the vehicle can travel.

When the cassette 1 is lowered by the cassette holder 22, the engagement groove 3a of the supply reel 3 and the reel claw 1
3, the projection 13a abuts on the projection 3c of the supply reel 3, depending on the positional relationship (phase) of the projection 13a.
It may not be possible to engage with the engagement groove 3a. In this case, since the reel claw 13 can descend along the shaft portion 12a of the supply reel base 12 against the elasticity of the spring 17, the projection 13a and the projection 3c come into contact with each other as described above. In this case, the mounting of the cassette 1 is not hindered, and the rotation of the supply reel base 12 causes the protrusion 1
When the phase between the engagement groove 3a and the engagement groove 3a coincides, the reel claw 13 is raised by the elastic force of the spring 17, whereby an appropriate engagement state between the engagement groove 3a and the reel claw 13 is obtained.

However, when the reel claw 13 simply moves up and down along the shaft portion 12a in the above configuration, when the projection 13a of the reel claw 13 and the projection 3c of the supply reel 3 come into contact with each other, During the movement of the cassette holder 22, the engagement of the reel claw 13 with the engagement groove 3a of the supply reel 3 may not be completed. In this case, there are the following problems. The holder mechanism for mounting the cassette 1 shown in FIG. 6 is generally configured such that a user directly presses and locks the holder mechanism, particularly in a camera-integrated VTR or the like. Further, in view of simplification of the mechanism, cost, and the like, a method is employed in which the lock of the take-up reel 2 and the supply reel 3 by the lock member 5 is released by the lock release member 7 'during the lowering operation of the cassette holder 22, and Such a system has become mainstream.

That is, in such a configuration, particularly when the cassette holder 22 is not securely locked or when the user operates the cassette holder 22 up and down in a random manner,
When the reel lock of the cassette 1 is activated or released,
When these are repeated frequently, the supply reel 3 (or the take-up reel 2) is particularly in a situation where the projection 3 c of the supply reel 3 and the projection 13 a of the reel claw 13 come into contact with each other.
There is a danger that the tape 4 will rotate in a direction in which the tape 4 becomes slack (FIG. 5, arrow A). As a result, as shown by a two-dot chain line in FIG. 5, the tape 4 'is slackened, which causes various troubles.

Therefore, according to the second embodiment, as described above, even in a situation where the projection 3c of the supply reel 3 and the projection 13a of the reel claw 13 are in contact with each other, the cassette 1 can be moved down during the downward movement. Engagement groove 3a of supply reel 3 and reel claw 13
And a magnetic recording or reproducing apparatus in which the supply reel 3 is rotated in the winding direction of the tape 4 at that time. That is, the reel claw 13 to be engaged with the supply reel 3 not only moves up and down, but also rotates by itself.

The present embodiment is applied to a supply-side reel unit. FIG. 10 shows an example of a configuration around a supply reel table 12 according to the second embodiment. In the figure,
In this example, a pair of guide protrusions 26 are formed on the outer periphery of the shaft portion 12a of the supply reel base 12 so as to be inclined.
The reel claw 13 has an insertion hole 13 for the cap 25 '.
The insertion hole 13b has a groove 27 that fits with the guide protrusion 26. In a normal state, the reel claw 13 is urged upward by the elastic force of the spring 17, but is guided by the guide convex portion 26 along with its lowering (arrow B in FIG. 10). Direction). In addition,
When the engaging groove 3a of the supply reel 3 is formed so as to divide the circumference into six as in the case of this embodiment, the amount of rotation of the reel claw 13 by the guide of the guide protrusion 26 is approximately 60 °. Set to about.

FIG. 11 shows the operation in the second embodiment. Note that this is a case where the projection 3c of the supply reel 3 and the projection 13a of the reel claw 13 are in contact with each other. In the drawing, the center axis of the supply reel base 12 is indicated by a chain line. First, as shown in FIG. 11A, the protruding portion 3 c of the supply reel 3 that has descended contacts the protrusion 13 a of the reel claw 13. As a result, the reel claw 13 is further lowered, and at this time, the reel claw 13 rotates in the direction of arrow C by the action of the guide projection 26 (FIG. 11B). 11C, the projection 13a of the reel claw 13 starts to engage with the engaging groove 3a of the supply reel 3. As shown in FIG. The reel claw 13 starts to rise due to the elasticity of the spring 17 due to the engagement state with the supply reel 3 as described above. (See arrow D in FIG. 11D). When the reel claw 13 returns to the original position, the supply reel 3 is also rotated in the direction of the arrow D, and in this state, the reel claw 13 and the supply reel 3 maintain the engaged state.

Even when the projection 3c of the supply reel 3 and the projection 13a of the reel claw 13 come into contact with each other as described above, they are securely engaged with each other, and the supply reel 3 is relatively turned in the direction of arrow D. By moving, the tape 4 is wound in the direction opposite to the direction of arrow A in FIG. As a result,
The slack of the tape 4 can be prevented, and trouble based on this can be eliminated.

In the above case, the projection 13a of the reel claw 13
By setting the inclination of the leading end of the supply reel 3 as shown in FIG. 12, when it comes into contact with the projection 3c of the supply reel 3, it always starts to rotate in the direction of the arrow C and acts more effectively. In addition,
The guide convex portion 26 and the concave groove 27 in the second embodiment may be formed in a reverse relationship to the above, that is, the guide convex portion 26 is formed as a guide concave groove and the concave groove 27 is formed as a convex portion. Even in this case, the same operation and effect as in the above case can be obtained. Furthermore, although the case of the supply reel 3 has been described as an example, the same operation and effect as described above can be obtained even when applied to the take-up reel 2 side.

[0025]

As described above, according to the present invention, it is possible to eliminate the change in the tape mounting position before and after the cassette is attached and detached, and to easily perform the splicing recording without cueing. The operation can be easily and reliably performed, and there are advantages such as improved operability. In addition, there is an advantage that a reliable engagement with the reel and the reel claw is ensured particularly when the cassette is mounted, and a smooth operation is realized particularly without tape slack or the like.

[Brief description of the drawings]

FIG. 1 is a plan view of a cassette used in a recording or reproducing apparatus according to a first embodiment of the present invention.

FIG. 2 is a plan view showing a configuration example of a main part of the apparatus of the first embodiment.

FIG. 3 is a longitudinal sectional view of a supply reel table of the first embodiment.

FIG. 4 is a flowchart for explaining the operation of the first embodiment.

FIG. 5 is a plan view of a cassette used in a recording or reproducing apparatus according to a second embodiment of the present invention.

FIG. 6 is a perspective view showing a configuration example of a main part of the apparatus of the second embodiment.

FIG. 7 is a side view of a reel base as a reference example of the second embodiment.

FIG. 8 is an exploded perspective view of a reel base as the reference technology example.

FIG. 9 is a perspective view showing a relationship between a reel and a reel claw of the device of the second embodiment.

FIG. 10 is an exploded perspective view of a reel base of the apparatus of the second embodiment.

FIG. 11 is a view for explaining the operation of the reel base of the apparatus of the second embodiment.

FIG. 12 is a view for explaining an operation in a modified example of the reel base of the second embodiment device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cassette 2 Take-up reel 2a Engagement groove 3 Supply reel 3a Engagement groove 4 Tape 5 Lock member 7 Release pin 8 Reel lock release lever 10 Locking solenoid 11 Supply reel motor 12 Supply reel base 12a Shaft 13 Reel claw 13a Projection Unit 14 Take-up reel motor 15 Take-up reel base 16 Reel claw 16a Projection 17 Spring 18 Brake lever 20 Brake solenoid 21 Control circuit 22 Cassette holder 23 Reel chassis 26 Guide projection 27 Groove

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G11B 15/30

Claims (4)

(57) [Claims] 1. A reel base having a shaft portion, a claw portion vertically movably inserted into the outer periphery of the shaft portion, and a biasing member for biasing the claw portion to move upward. By mounting a cassette in which the wound reel is rotatably stored at a predetermined position, the claw portion of the reel base is engaged with the engaging groove of the shaft portion insertion hole provided in the reel. In the recording or reproducing apparatus, a lock member driving mechanism for selectively switching between a locked state and an unlocked state of the reel by a lock member provided on the cassette, and a fixed state and a fixed released state of the reel base are provided. A reel base brake mechanism for selectively switching, wherein the reel is locked via the lock member by the lock member driving mechanism when the cassette is mounted, and A recording or reproducing apparatus characterized in that the fixing of the reel base by the reel base brake mechanism is released, and the reel base is rotated by at least one phase at which the claw portion and the engaging groove engage. . 2. A reel base comprising: a shaft portion; a claw portion movably inserted into the outer periphery of the shaft portion; and a biasing member for biasing the claw portion to move upward. By mounting a cassette in which the wound reel is rotatably stored at a predetermined position, the claw portion of the reel base is engaged with the engaging groove of the shaft portion insertion hole provided in the reel. In the recording or reproducing apparatus, an inclined guide portion is provided on an outer periphery of a shaft portion of the reel base, and a guided portion to be engaged with the inclined guide portion is provided on the claw portion. A recording or reproducing apparatus characterized in that the claw portion is lowered along with the urging member by engagement, and is rotated along the outer periphery of the shaft portion. 3. The recording or reproducing apparatus according to claim 2, wherein a rotation direction accompanying the lowering of the claw portion is a direction in which the tape is pulled out. 4. The rotation angle accompanying the lowering of the claw portion is approximately 6
4. The recording or reproducing apparatus according to claim 2, wherein the angle is 0 degrees.