JPS63266662A - Rotary head type recording or reproducing device - Google Patents

Abstract

PURPOSE:To perform the feed of a tape and the drive of a winding reel with the aid of a light load and in addition in a short stroke by moving a first and a second movable members by means of a third movable member which moves as being linked with the movement of a tape loading means in a loading direction. CONSTITUTION:The first movable member 41 and the second movable member 40 are arranged respectively between a pair of the reels, and they are constituted so as to be moved by the third movable member 47 which moves according to the loading of the tape. Thus, both the movable members 41, 40 can be operated through the use of the single stroke, and the release of the brake of reel posts 11, 12 and the switching of the transmission route of a reel driving force can be performed with the aid of the small stroke comprehensively.

Description

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

In conventional video tape recorders (VTRs), the tape supply reel and take-up reel are driven by switching the rotational direction, speed, etc. of the driving force from the drive source using mechanical switching means. 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 is changed only by switching electrical switches, but there are demands from all directions for a mechanism to apply this to simple VTRs. It is something.

An object of the present invention is to provide a mechanism that can supply tape and drive a take-up reel in a rotary head type recording or reproducing apparatus as described above with a light load and with a short stroke, and thereby enables mode switching. Embodiments of the present invention will be described in detail below with reference to the drawings. Figures 1 and 2
The figures are mechanical diagrams of a reel drive section showing an embodiment of a VTR according to the present invention, with FIG. 1 showing a tape loading state and FIG. 2 showing a tape unloading state. Recording and reproduction of the magnetic tape is carried out in the tape loading state shown in the first figure, and tape fast forwarding and early spring reversing are carried out 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, the tape drawer bins 13, 14 are linked to the loading ring 20, and the tape loading position (first
(as shown in the figure) and a tape non-mounted position (as shown in the second figure).

The loading ring is driven by a loading motor (not shown), and tape loading and unloading are accomplished by forward and reverse rotation of the loading motor. A capstan motor 22 shown in FIG. 2 is a flywheel 2 to which a capstan 18 is concentrically connected.
3 is driven by a belt, and furthermore, a reel drive pulley 26 is driven by a belt via an intermediate pulley 24. The pickup idler 25 is coaxially attached to the intermediate pulley 24, and the rotational force of the intermediate pulley 24 is transmitted to the pickup idler 25 through frictional coupling. The tick-up idler 25 is a reel stand for winding the tape sent out by the pinch roller and capstan onto a take-up reel when the tape pinched by the pinch roller 19 and capstan 18 runs in the forward direction. The pick-up reel stand 12 is brought into pressure contact with the outer periphery of the pick-up reel stand 12 to perform a winding operation.

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

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 includes a plurality of pawl portions 30-a.
The clutch pawl member 3 fits into the hole provided on the reel drive pulley 26, and the clutch pawl member 3 fits into the convex portion provided on the clutch receiving plate 28.
Coordination and non-coordination occur depending on the vertical movement of 0. This results in
The rotational force of the reel drive pulley 26 is transmitted to the reel shaft 27 through either a transmission route that transmits it via the friction member 29 or a transmission route that transmits it without going through the friction member 29 . The shaft 27 is rotatably supported by a bearing 33 implanted in a main body base plate 49, and a gear 34 is fixed thereto as shown in FIG. A swinging arm 36 having a bearing 35 at one end is rotatably supported on the upper part of the gear 34, 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. and the gear 34 are positioned in 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 38 An elastic body such as rubber integrally molded 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.

As shown in FIG. 4, a substantially triangular hole 45a is provided in a part of the idler regulating slide 45, which is slidably disposed approximately in the center of both reel stands 11, 12, and the idler is inserted into the hole 45a. 38 axes 37 are located. In the state shown in FIG. 4, the idler regulating slide 45 is located at the lowermost end, and even if the reel drive pulley 26 rotates, the shaft 37 of the idler 38 is not aligned with the slope 45 of the triangular hole 45.
-b By being regulated to the abutting neutral position,
Since the idler 38 does not touch the outer periphery of both reel stands, no reel stand driving operation is performed.

The idler regulating slide 45 moves upward and the shaft 3
When the regulation of the slope 45b relative to the reel 7 is released, the idler 38 comes into pressure contact with either of the two reel stands depending on the direction of rotation of the drive pulley 26, and operations such as fast forwarding and rewinding are performed.

The clutch switching lever 47, which is a third movable member, is rotated in the counterclockwise direction by a spring as shown in FIG. They are in the position shown in Figures 3 and 4.

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

The brake slide 41 has brake pads 4 on both arms.
1-a, and is slidably attached to shafts 42 and 43 implanted in the base plate 49, and is biased by a spring 41-b in a direction in which the brake pad 41a comes into contact with both reel stands.

The clutch pawl slide lever 39 is rotatably supported around a shaft 51 provided at the bottom of the board, and 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 engages with a protrusion 40a of the clutch switching slide 40. Therefore, the clutch switching slide 40 is also urged in the same direction as the brake slide 41 by the spring force that urges the clutch pawl lever 39 to rotate.

However, the clutch switching lever 4, which is the third movable member,
The spring force that biases 7 to rotate counterclockwise is
Since the spring force is set to be 1 stronger than the spring force that biases the brake slide 41, which is a movable member, and the clutch switching slide 40, which is a second movable member, the rotation of the core clutch switching lever 47 causes , the brake slide 41
% and the clutch switching slide 40 will be moved upward in FIG.

When unloading, as shown in FIG.
- It is in an engagement relationship with the positional relationship with a. 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 shift latch switching slide 40 moves upward, which causes the switching lever 39 to rotate clockwise in FIG. 3, causing the clutch pawl plate 30 to move upward. However, the engagement between the clutch receiving plate 28 and the clutch pawl plate 30 is released, and the rotational force of the drive boob 926 is transmitted by the frictional force via the slip member 29 to the gear 34.

Further, in the above state, since the idler regulating slide 45 is urged downward in FIG. 4 by a spring (not shown), the idler 38 is not pressed against the reel stand.

Fast forwarding 9 and rewinding operations during photographing are operated by a switching lever 51. For fast forwarding, the switch 52 is closed by tilting the lever 51 toward the fast forwarding side in FIG. 2, and the capstan motor 22 rotates clockwise. At the same time, the lever 5 is rotated counterclockwise by the switching lever 51.
4 engages with the FR lever 51 via the rotating end surface, rotates clockwise, and the idler regulating slide is pushed upward by the protrusion 54a of the lever 54 (Fig. 2), as described above. By rotating the swinging arm 36 as shown in FIG. At the same time,
Brake slide 4 at one end of idler regulation slide 45
1, the brake slide 41 and idler regulation slide 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.

When rewinding, the operation is almost the same as above.

When the switch 53 is closed, the capstan motor rotates counterclockwise, and at the same time, when the switching lever 510 is rotated clockwise, the slider 58 moves to the right (in FIG. 3), and the brake is released as described above, and the idler 38 is brought into pressure contact with the supply reel 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 are used to excite the solenoid and control the forward/reverse switching of the motor 22. By doing this, you can perform fast forwarding, rewinding, etc. using soft touch operations.

Therefore, if the above configuration is adopted, tape fast forwarding and
At the same time, it is possible to reduce the amount of movement of the operating force mechanism during early spring return, and at the same time, it is possible to prevent the tape from moving in the reverse direction during variable speed playback by controlling the capstan rotation speed during fast forwarding within the cassette, early spring return, and tape loading. You can easily set the winding mode for both the take-up reel and supply reel.
Furthermore, by driving the lever 54 via an electro-mechanical conversion element such as a solenoid, it has many advantages in that it can be easily developed 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 arranged between a set of reels, and these are moved by the third movable member that moves according to the tape mounting. Since it is configured to move, it is possible to operate both rotating members with a single stroke, and it is possible to release the braking of the reel stand and switch the transmission path of the reel driving force with a small overall stroke. .

[Brief explanation of the drawing]

1 and 2 are mechanical diagrams of a reel drive section showing an embodiment of a rotary head type recording or reproducing apparatus according to the present invention, in which FIG. 1 is in a tape rope unloading state, and FIG. 2 is in a tape unloading state. shows. FIG. 3 is a side view of the mechanism of the apparatus shown in FIGS. 1 and 2, and FIG. 4 is a detailed structural diagram showing the mechanism of the reel braking section of the apparatus shown in FIGS. 1 and 2. 1... Substrate 10... Cassette 11... Supply reel stand 12... Take-up υ reel stand 13.14... Loading bin 15... Full width erasing head 16... Rotating head-drum 17 ...Control head, audio head 18...
- Capstan 19... Pinch roller 20... Loading ring 26... Reel drive pulley 29... Friction member 36 as a sliding torque transmission member... Swing arm 38... Idler 40... -Clutch switching slide 41 as a second movable member...Brake slide 47 as a first movable member...Clutch switching lever 51 as a third movable member...Switching lever

Claims (1)

[Claims] In an apparatus in which a tape is mounted on a rotating head drum by a tape mounting means and a signal is recorded or reproduced by a rotating head provided on the drum, a braking unit for a supply reel stand and a take-up reel stand of the tape is provided. A first movable member to be connected and a second movable member to switch a transmission path of a driving force transmission mechanism to the supply reel stand and the take-up reel stand are arranged at an intermediate position between the set of reel stands. , a third tape that moves in conjunction with the movement of the tape mounting means in the mounting direction.
By moving the first and second movable members by the movable member, the braking of the set of reel stands by the braking unit is released, and the driving force is transferred from the transmission path to the path directly connecting the driving force. A rotary head type recording or reproducing device characterized in that the rotational head type is switched to a transmission path via a sliding torque transmission member.