JPH0250543B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotary head type recording or reproducing apparatus, and more particularly to a tape supply and take-up reel drive mechanism thereof.

Conventionally, in this type of device, such as a video tape recorder (VTR), the tape supply reel and take-up reel are driven by applying driving force from a drive source to the rotational direction by switching a mechanical mechanism, or by using speed switching means, etc. This was done by communicating information. Therefore, the operation of the switching key for this purpose is relatively heavy and requires a long stroke. Various logic controls have been proposed in which the operating mode of such devices can be changed only by switching electrical switches, but there are requests from all directions for a mechanism to apply this to simple VCRs. It is something that exists.

SUMMARY OF THE INVENTION An object of the present invention is to provide a mechanism capable of feeding a tape and driving a take-up reel in a rotary head type recording or reproducing apparatus as described above with a light load and a short stroke. This mechanism is convenient for realizing logic control using only a changeover switch.

Embodiments of the present invention will be described in detail below with reference to the drawings. Figures 1 and 2 are mechanical diagrams of a reel drive unit of a VTR as an embodiment of the present invention.
FIG. 1 shows a tape loading state, and FIG. 2 shows a tape unloading state. Recording and reproduction of signals on the magnetic tape is performed in the tape loading state shown in the first figure, and fast forwarding and fast rewinding of the tape is performed in the tape unloading state shown in the second figure.

The operation of the mechanism will be explained in detail below with reference to FIGS. 1 and 2. In the figure, tape pull-out pins (tape loading means) 13 and 14 are linked to a loading ring 20, and the tape loading position (first diagram) is
It reciprocates between the tape non-mounted positions (second diagram).
The loading ring is driven by a loading motor (not shown), and tape loading and unloading are accomplished by rotating the loading motor 21 in forward and reverse directions. The capstan motor 22 shown in FIG.
A flywheel 23 concentrically connected thereto is driven by a belt, and a reel drive pulley 26 is driven by a belt via an intermediate pulley 24. The take-up idler 25 is mounted coaxially with the intermediate pulley 24, and the rotational force of the intermediate pulley 24 is transmitted to the take-up idler 25 through a frictional connection. The take-up idler 25 serves as a take-up idler for winding the tape fed out by the pinch roller 19 and capstan onto a take-up reel when the tape sandwiched by the pinch roller 19 and capstan 18 runs in the forward direction. The take-up reel stand 1 is pressed against the outer periphery of the reel stand 12.
2. Perform the winding operation.

FIG. 3 is a side view of the mechanism of the apparatus shown in FIGS. 1 and 2. In the figure, the reel drive pulley 26 is
A spring 26 is supported in a pressing direction against a clutch receiving plate 28 which is rotatably and slidably supported by a shaft 27 and fixed to one end of the shaft 27 via a friction member 29 such as felt.
It is energized by a.

The clutch pawl member 30 is rotatably and slidably pivotally attached to the outer periphery of the boss portion of the reel drive pulley 26, and the plurality of pawls 30a fit into holes provided in the reel drive pulley 26 and are attached to the clutch receiving plate 28. The clutch pawl member 30 is engaged and disengaged with the provided recess according to the vertical movement of the clutch pawl member 30. Thereby, the drive of the reel shaft 27 can be set to two transmission modes: a mode in which the rotational force of the reel drive pulley 26 is frictionally coupled via the clutch receiving plate 28, or a mode in which it is directly coupled. The shaft 27 is a bearing 3 implanted in the main body substrate 49.
3, and a gear 34 is fixed thereto as shown in FIG. A bearing 3 is mounted on the upper part of the gear 34.
A gear portion of an idler 38 is rotatably supported by a swinging arm 36 having a reference number 5 at one end, and a gear portion of an idler 38 is pivotally supported by a shaft 37 implanted at the other end of the swinging arm 36;
The gear 34 is positioned in a meshing relationship.

Therefore, depending on the direction of rotation of the reel drive pulley 26, the swing arm 36 receives a rotational force. That is, in FIG. 2, when the reel drive pulley 26 rotates counterclockwise, the swing arm 36 is also urged to rotate counterclockwise due to the frictional resistance between the idler 38 and the shaft 37, and the idler 3
An elastic body such as rubber integrally formed on the outer periphery of the supply reel 11 is pressed against the outer periphery of the supply reel 11, and the supply reel 11 rotates counterclockwise to perform a tape rewinding operation.

Note that the tape fast forward operation is the reverse of the above operation, so a detailed explanation will be omitted.

An idler regulation slide 45 as a second movable member is slidably arranged approximately in the center of both reel stands 11 and 12.
5 has a substantially triangular hole 4 as shown in FIG.
5a is provided, and the shaft 37 of the idler 38 is located in the hole 45a. In the state shown in FIG. 4, the idler regulating slide 45 is in the second position.
It is located at the lowest end in the figure, and even if the reel drive pulley 26 rotates at this time, the shaft 3 of the idler 38
7 comes into contact with either of the slopes 45b of the triangular hole 45 and is restricted to a neutral position, so that the idler 38 does not touch the outer periphery of both reel stands, and therefore no reel stand driving operation is performed.

When the idler regulating slide 45 moves upward in FIG. 2 and the restriction of the slope 45b to the shaft 37 is released, the idler 38 is placed on either of the reel stands depending on the direction of rotation of the drive pulley 26. Operations such as pressure contact, fast forwarding, and rewinding are performed.

The clutch switching lever 47 is moved counterclockwise to the fourth
It is rotatably biased by a spring as shown in the figure, and comes into contact with a pin 50 planted on the loading ring 20b during unloading, and is moved to the position shown in FIGS. 3 and 4 by the pin 50. positioned.

The loading rings 20a and 20b rotate counterclockwise and clockwise, respectively, during loading. Therefore, immediately after starting loading, pin 50
moves in the disengagement direction from the clutch switching lever 47, the clutch switching lever 47 rotates counterclockwise, and the arm portion 47a moves the brake slide 41 as the first movable member and the clutch switching slide 40.
move upward.

The brake slide 41 has brake pads (braking parts) 41a on both arms thereof, and is slidably attached to shafts 42 and 43 implanted in a base plate 49, and is moved in the direction in which the brake pads 41a abut against both reel stands by a spring 41b. , that is, it is urged downward in FIG.

The clutch pawl slide lever 39 is rotatably supported around a shaft 61 provided at the bottom of the board.
It is urged to rotate counterclockwise in FIG. 3 by a spring (not shown). The arm portion 39a of the clutch pawl slide lever 39 extends to the upper surface of the substrate through an opening provided in the substrate 49, and extends to the upper surface of the substrate through an opening provided in the substrate 49, and a protrusion 40a of the clutch switching slide 40 (shown in FIG. 4).
is engaged in. Therefore, clutch pawl lever 3
Due to the spring force biasing the clutch switching slide 40 to rotate, the clutch switching slide 40 also
Similarly, in FIG. 2, it is urged downward. Note that the brake slide 41 and the clutch switching slide are configured not to come into direct contact with each other.

Here, the spring force that urges the clutch switching lever 47 to rotate in the counterclockwise direction is set to be stronger than the spring force that urges the brake slide 41 and the clutch switching slide 40. ,
Rotation of the clutch switching lever 47 in the counterclockwise direction causes the brake slide 41 and the clutch switching slide 40 to move upward in FIG. 4.

That is, during unloading, as shown in FIG. 3, the clutch receiving plate 28 and the clutch pawl plate 30 are in contact with the pawl portion 30a of the clutch pawl plate 30, since the clutch pawl lever 39 is biased counterclockwise. Since it fits into the recess of the clutch receiving plate, it is in an engaging relationship.
Therefore, in this state, the rotational force of the drive pulley 26 is directly transmitted to the gear 34 as described above.

As the loading ring rotates, the clutch switching slide 40 moves upward in FIG. 4, which causes the switching lever 39 to rotate clockwise in FIG. 3. The clutch pawl plate 30 moves upward in FIG. Transmitted by force.

Also, in the above condition, the idler regulation slide 45
is urged downward in FIG. 4 by a spring (not shown), so the idler 38 is not pressed against the reel stand.

Fast-forwarding and rewinding operations during photographing are performed using an operating lever 51 shown in FIG. During fast forwarding, the switch 52 is closed by tilting the lever 51 toward the fast forwarding side (to the right in the figure) in FIG. 2, and the capstan motor 22 rotates clockwise. At the same time, by rotating the operating lever 51 counterclockwise,
The pin 54b on the lever 54 engages with the end surface 51b of the rotating fan of the FR lever 51, and the lever 54 rotates clockwise. At this time, the protrusion 54 of the lever 54
a, the idler regulating slide 45 is pushed upward in FIG. 2, and by releasing the rotation regulation of the swing arm 36 as described above, the idler 38 is pressed against the take-up reel 12. At the same time, the brake slide 41 is pressed with one end of the idler regulating slide 45.
and the idler regulation slide 45 move together. At this time, since the brake slide 41 is moved in the brake release direction, the brakes on both reels are released and the tape is rapidly fed within the cassette.

In the case of rewinding, the operation is almost the same as that described above, and at the same time when the switch 53 is closed, the carbstan motor rotates counterclockwise, and at the same time, the operating lever 51 rotates clockwise, so that the end face 51 of the rotating fan is rotated.
a to press the pin 58b on the slider 58 to the right (in FIG. 2). Along with this, the slider 58 moves to the right, the brake is released as described above, and the rotation restriction of the swing arm 36 is released.
The idler 38 is brought into pressure contact with the supply reel stand 11, and a rewinding operation is performed.

Also, when performing the above operations electrically using a solenoid or the like, the solenoid is arranged to engage with the slider 58, and the switches 53 and 52 control the excitation of the solenoid and the forward/reverse switching of the motor 22. By doing this, it becomes possible to perform fast forwarding, rewinding, etc. using soft touch operations.

Therefore, if the configuration described above is adopted, it is possible to reduce the operating force and the amount of movement of the mechanism during tape fast forwarding and fast rewinding, and at the same time reduce the amount of movement of the mechanism during fast forwarding and fast rewinding within the cassette. The winding mode of both the take-up reel and the supply reel can be easily set for forward and reverse tape feeding during variable-speed playback by controlling the capstan rotational speed during playback.Furthermore, the lever 54 can be driven by an electro-mechanical conversion element such as a solenoid. By doing so, there are various advantages such as ease of development into logic control using soft touch.

As explained above, according to the present invention, the first movable member and the second movable member are respectively disposed between a set of reels, and both move in the same direction in response to tape fast forwarding or fast rewinding operations. Since we configured it to
Both of the movable members can be moved with a single stroke, and the reel base brake can be released and the reel drive member can be prevented from contacting the reel base with a small overall stroke. Further, as a preferred embodiment of the present invention, the first and second movable members are configured to move together during tape unloading, so that the members that move the first and second movable members are shared. can.

[Brief explanation of the drawing]

1 and 2 are mechanical diagrams of a reel drive section showing an embodiment of the magnetic recording/reproducing apparatus according to the present invention, with FIG. 1 showing a tape loading state and FIG. 2 showing a tape unloading state. Figure 3 is like Figure 1,
Figure 2 is a side view of the device shown in Figure 4, Figure 4 is Figure 1,
It is a detailed block diagram which shows the mechanism of the reel brake part of the apparatus shown in 2nd figure. DESCRIPTION OF SYMBOLS 1... Board, 10... Cassette, 11... Supply reel stand, 12... Take-up reel stand, 13, 14... Loading pin, 15... Full width erase head, 16... Rotating head drum, 17... Control head, audio head, 18... Capstan, 19... pinch roller, 20... loading ring, 26... reel drive pulley, 36... rocking arm, 38... idler as reel drive member, 40... clutch switching slide, 41... brake as first movable member Slide, 45... Idler regulation slide as a second movable member, 47... Clutch switching lever, 5
1...Fast forward and rewind operation lever.

Claims (1)

[Scope of Claims] 1. A rotary head type recording or reproducing apparatus in which a tape is mounted on a rotary head drum 16 by means of tape mounting means 13, 14, and a signal is recorded or reproduced using a rotary head provided on the drum. A first movable member 41 that connects the braking unit 41a to the tape supply reel stand 11 and take-up reel stand 12, and a second movable member that restricts the reel drive member 38 from coming into contact with the pair of reel stands. member 45 is disposed at an intermediate position between the set of reel stands, and the first movable member is moved by the braking unit in conjunction with the movement of the tape mounting means in the tape mounting direction. moves in a direction to release the brake on the reel stand, and when the tape mounting means is in a state where the tape is not mounted on the drum, the first and second By moving the two movable members in the same direction, the braking of the set of reel stands by the braking unit is released, and the restriction on contact of the reel drive member with the set of reel stands is released. Rotating head type recording or reproducing device. 2. The rotation according to claim 1, wherein the first and second movable members are movable integrally when the tape mounting means is not mounting the tape on the drum. Head type recording or reproducing device.