JPH0296961A - Tape running device - Google Patents

Abstract

PURPOSE:To smooth the rotation of a cylinder at the time of shifting to a recording and reproducing mode by regulating and moving a tension post in a direction where it approaches to the cylinder as soon as the cylinder starts to rotate again. CONSTITUTION:When the title device is in a reproducing and recording state again after stopping an operation mode, the cylinder 5 rotates and a lever 12 moves to one side. With this movement, the left end of the cam part 13 of the lever 12 abuts on the engaging pin 14 of a tension arm 10, which turns clockwise centering around a shaft 10a and stops according to the shape of the cam part 13, and the tension of a tape 2 is released. At such a time, a tension band 10b is loosened and a supply reel base 21 is made free. When the lever 12 moves to the other side next, the arm 10 turns counterclockwise and the tension is applied to the tape 2 again, which is taken up.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a tape running device for stably driving a tape, and is particularly applicable to a magnetic recording/reproducing device.

BACKGROUND OF THE INVENTION In recent years, as magnetic recording and reproducing devices (hereinafter referred to as VTRs) have become more sophisticated in their editing functions, there has been a strong demand for faster mechanical responses during operation and mode switching. .

An example of a tape running device for a VTR that has already been proposed will be described below with reference to the drawings.

FIG. 5 shows a plan view of a tape running device that has already been proposed. In the figure, 1 is a tape cassette that houses a supply reel 3 on which tape 2 is wound and a take-up reel 4. 6 is a rotating head cylinder (hereinafter referred to as cylinder) around which the tape 2 is wound by the loading post 6. Reference numeral 7 denotes a tilting post that tilts the tape 2; 8 a regulating post placed near the tilting post 7 and regulating the running position of the tape 2; 9 a regulating post provided near the regulating post and rotating to control the tension of the tape 2; It is a tension boss that controls.

Regarding the tape running device configured as in 2 below,
The operation will be explained using FIGS.

Now, when tape cassette 1 is installed on the main board, ml
(7) The lever 12 and tension arm 10 are in the position shown in FIG. Also, the loading post 6 and the tension post 9 are located at the openings 1a and 1b of the tape cassette 1, respectively.
The tape 2 is stretched over the front surface of the tape cassette 1 as shown by the two-dot chain line in FIG. Next, the process of winding the tape 2 around the cylinder 6 will be explained. When an operating mode such as recording or reproduction is entered, the loading post 6 is moved by a mechanism (not shown) from the position indicated by a dotted line to the position indicated by a solid line as shown in FIG. 6 while pulling out the tape 2 from the tape cassette 1. At the same time, the pinch roller 15 also moves. Along with this operation, the first lever 12 moves in the direction of arrow C shown in FIG. As the first lever 12 moves in the C direction, the contact position between the engagement pin 14 formed on the tension arm 10 and the first cam portion 13 of the first lever 12 changes, and the tension arm 10 The shaft 10a rotates counterclockwise around the shaft 10a and comes into contact with the tape 2 to apply tension.

Next, when a stop operation is performed, the pinch roller 16 moves from the position shown by the solid line in FIG. 5 to the 1 position shown by the dotted line. Also,
The cylinder 6 continues to rotate for a predetermined period of time (for example, about 10 minutes), but then stops to protect the tape. As mentioned above, the left stopped state is hereinafter referred to as the second 5TOP and is recorded and re-recorded (L
The mode transition to etc. will be performed from this state in the future.

Problems to be Solved by the Invention However, in the above configuration, the second S T O
When attempting to transition from P state to recording or playback, tape 2
is wrapped around the outer periphery of the cylinder 6, and the capstan 16 rotates at the same time as the cylinder 5 rotates, and the tension post 9 also works, so there was a problem that the cylinder 6 did not rotate smoothly.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to provide a tape running device that can smoothly rotate a cylinder when transitioning from recording to playback.

Means for Solving the Problems In order to solve the above-mentioned problems, the tape running device of the present invention includes an inclined post that tilts the tape in order to pull out the tape from the tape cassette and wind it spirally around the outer periphery of the rotating head cylinder. , a regulation post that regulates the running position of the tape in the vicinity of the inclined post, a lever that moves on the board in response to operation modes such as recording, playback, and stop, and a lever that is rotatably supported by the board at one end. a tension arm that is rotatably biased in a predetermined direction and has a tension post at the other end that controls the tape tension; a cam portion formed on the lever for regulating rotation;
At the same time as this rotary head cylinder starts to rotate again with the tape spirally wound around its periphery, the cam part of the lever is brought into contact with the engagement pin set on the tension arm, and the tension boss F It has a configuration in which it is regulated to move in a direction approaching the rotating cylinder.

Operation The present invention has the above-described structure, and at the same time when the rotating cylinder that has been stopped with the tape wound thereon starts rotating again, the cam portion of the lever is inserted into the engagement pin set on the tension arm. By bringing the tape into contact and moving the tension post in a regulated direction toward the rotating cylinder, the tension on the tape can be loosened and the rotating cylinder can be rotated smoothly.

EXAMPLE Hereinafter, a tape traveling device according to an example of the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing a tape traveling device according to an embodiment of the present invention.

In the figure, the same elements as those explained in FIGS. 1o
A tension arm has a tension post 9 installed at one end thereof, and is biased to rotate counterclockwise by a spring member 11. The tension arm 10 includes a first lever 1
An engagement pin 14 that can be freely engaged with a first cam portion 13 formed at one end of the cam 2 is installed.

FIG. 1 is a plan view of a main part showing a tape running device according to an embodiment of the present invention, in which a cam portion 13 is formed on a first lever 12, and a cam portion 13 is formed on a first lever 12, and a cam portion 13 is formed on the first lever 12, and a cam portion 13 is formed on the first lever 12. Translate above. During recording and reproduction, and in the second 5TOP state, the tension arm 1o is held at the position shown in FIG. 3 against the biasing force of the spring member 11. Here, when the first lever 12 moves in the direction of the arrow, the left end of the first cam portion 13 of the first lever 12 comes into contact with the engagement pin 14 of the tension arm 10, and the tension arm 1o is moved along the axis IQa.
It can be rotated clockwise around the center. 16 is a capstan that pinches the pinch roller 15 and the tape 2 and drives the tape 2.

10b is a tension band whose one end is rotatably supported by the tension arm 10 and whose other end is fixed at a position around which the supply reel stand 21 is wound.

The operation of the tape running device of this embodiment constructed as described above will be explained with reference to FIGS. 1 to 4.

When the operating mode goes from stop (which is the second S TOP as mentioned above) to the playback and record state again, cylinder 6
At the same time as the first lever 12 rotates, the first lever 12 moves in the direction D in FIG. First lever 12 (7) D
As the first cam portion 1 of the first lever 12 moves toward the engagement pin 14 formed on the tension arm 10, the first cam portion 1 of the first lever 12
3 comes into contact with the tension arm 10, and the tension arm 10 rotates clockwise around the shaft 10a, and then stops at the position shown in FIG.
release the tension. Tension am 1 at this time
Tension band 10b as clockwise rotation of
is loosened, and the supply reel stand 21 becomes free.

Next, the first lever 12 moves in the direction C shown in FIG. As the first lever 12 moves in the C direction, the tension arm 1o rotates counterclockwise about the shaft 10a to apply tension to the tape 2 again. Further, the tape 2 is fed out while being held between a capstan 16 and a pinch roller 16, and a take-up reel stand (not shown)
is rotated and the tape 2 is wound up.

Note that since the cylinder 5 usually rotates at the specified speed in about 1 to 2 seconds, the reciprocating movement of the tension arm 1o from FIG. 3 to FIG. 4 is performed while the rotation of the cylinder 6 reaches the specified speed. It is something.

Effects of the Invention As described above, according to the present invention, when the rotary cylinder that has been stopped after being wound with tape is rotated again, the cam part of the engagement bin lever installed on the tension arm is brought into contact with the tension arm, and the tension is increased. By regulatedly moving the post in a direction closer to the rotary cylinder, the tape tension can be instantly relaxed, and the rotation of the rotary cylinder can start smoothly. Therefore, it is possible to realize an excellent tape running device that can enter a mode such as playback in a very short time without causing tape damage.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a tape running device according to an embodiment of the present invention, FIGS. 2, 3, and 4 are plan views of main parts for explaining the operation of the device, and FIG. 6 is a conventional tape running device. FIG. 6 is a plan view of the main parts of the tape drive device. 1... Tape force cent, 2... Tape, 5
... Rotating head cylinder 7 ... Inclined post, 8 ... Regulation post, 9 ... Tension post, 10 ... Tension arm, 12
...-.First lever, 13...First cam part,
14... Engagement bin. Name of agent: Patent attorney Shigetaka Awano and 1 other person 1st
Illustration 2 Figure N 3 Figure 1 - Tape voice seso F 2 - - Chi 7゜6・One rotation head cylinder - 7・-1 (Koro-tai boss 8- Rei Hisako Iho 0butq-1 ~ tension post / θ - Lever of tension arm 72...11 / 3 - Jth cam section --- A system combination figure IZ axis figure figure

Claims (2)

[Claims] (1) A tilted post that tilts the tape in order to pull out the tape from the tape cassette and wind it spirally around the outer periphery of the rotating head cylinder, a regulation post that regulates the running position of the tape near the tilted post, and a recording - A lever that moves on the board in response to operation modes such as playback and stop, and a lever that is rotatably supported by the board at one end, is biased to rotate in a predetermined direction, and controls tape tension at the other end. The rotating head cylinder includes a tension arm having a tension post, and a cam portion formed on the lever that comes into contact with an engagement pin planted on the tension arm in an unloading state to restrict rotation of the tension arm. When the rotating head cylinder stops and the tape is spirally wound around the outer circumference of the rotating head cylinder, the rotating head cylinder starts rotating again, and at the same time, the cam part of the lever is brought into contact with the engagement pin set on the tension arm. A tape running device characterized in that the tension post is brought into contact with the rotating cylinder and regulatedly moves in a direction approaching the rotating cylinder. (2) In claim 1, the lever is moved in the opposite direction a little after the rotary cylinder starts rotating again, and the cam part releases the restriction on the engagement pin of the tension arm;
A tape running device characterized in that the tension arm returns to a servo state.