JPH0724131B2 - Magnetic tape loading device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a magnetic tape loading device including a tension arm and a pinch arm that rotate between a loading position and an unloading position.

[Prior Art] FIGS. 11 to 13 are plan views showing an example of a conventional magnetic tape loading device disclosed in Japanese Patent Laid-Open No. 64-56040, in which 1 is a chassis and 2 and 3 are chassis 1. Formed on the first and second guide grooves, 4,5 are first and second tape guide blocks slidably supported by the guide grooves 2 and 3, and 6 and 7 are first and second tape guide blocks. First and second stoppers for positioning the tape guide blocks 4 and 5, 10 is a rotating drum, 11 is a tension arm, which is supported by a shaft 14 standing upright on the chassis 1 at an intermediate portion and is tensioned at one end. Paul 12 is erected. A tension spring 15 always biases the tension arm 11 counterclockwise.

Reference numeral 123 denotes a loading cam member, which is rotatably supported by a shaft 137 erected on the chassis 1, and cam grooves 136 and 138 which are displaced from the outer circumference to the inner circumference are formed on the front surface and the back surface, respectively. Reference numeral 121 is a motor, and 122 is a deceleration transmission means for transmitting the driving force of the motor 121 to the loading cam member 123. 124 is an arm,
One end is rotatably supported by a shaft 134 that is erected on the chassis 1, and the pin 1
35 and a pin 125 that engages with the cam groove 136 are provided upright. Reference numeral 126 is a first mode switching member, and the mode switching member 126 includes a pin 128 provided upright on the chassis 1 and the member 126.
Is engaged with a guide groove 126a provided on the chassis 1, and a guide groove 127 formed on the chassis 1 and a pin 129 provided upright on the member 126 are engaged with each other to reciprocally attach to the upper surface of the chassis 1. Has been. A groove 126b that engages with the pin 135 on the arm 124 is formed at one end of the first mode switching member 126, and a cam portion 126c for controlling a reel brake (not shown) is formed in the member 126. Is also provided. 13
Reference numeral 0 denotes a second mode switching member fixed to the first mode switching member 126 via a pin 129, the pin 129 penetrating the guide groove 127 formed in the chassis 1, and the second mode switching member. The second mode switching member 130 is reciprocally supported by engaging the pin 132 erected on the 130 with the guide groove 131 formed in the chassis 1.
It can move integrally with the mode switching member 126. The second mode switching member 130 is provided with a cam portion 133 for controlling a reel brake (not shown).

190 is a pinch arm whose one end engages with a cam groove (not shown) formed in the loading cam member 123 and rotates continuously with the rotation of the loading cam member 123, and 191 has one end locked by the pinch arm. A preload spring for urging the arm 190 in the clockwise direction, 221 is a pinch roller provided at the tip of the pinch arm 190, and the pinch roller 221 contacts the capstan shaft 223 at the loading position.

FIGS. 14 to 15 are plan views of the back surface of the deck of the magnetic tape loading device shown in FIGS. 11 to 13 as seen through from the front side, and 62 is an arm, one end of which is a shaft 63 which is erected on the chassis 1. It has a first pin 64 and a second pin 65 which are pivotally supported and engage with the cam groove 138 at the other end. Reference numeral 50 denotes a loading transmission member, which is capable of reciprocating by engaging pins 59, 60, 61 erected on the chassis 1 with long grooves 50a, 50b, 50c provided in the loading transmission member 50. Further, a groove 50d that engages with the second pin 65 on the arm 62 is provided at one end of the loading transmission member 50, and a pin 53 is provided upright at the other end. 55 and 56 are first and second loading links, each of which is composed of two links. First and second gears 57 and 58 are fixed to one end of each, and the gears 57 and 58 are respectively the first and second gears. It meshes with two racks 51 and 52. The other ends of the first and second loading links 55, 56 are connected to the first and second tape guide blocks 4,5, respectively.
Is engaged with.

16 and 17 are plan views of the essential parts of FIG. 11. Reference numeral 13 is a swing arm, which is pivotally supported by a shaft 16 erected on the chassis 1, and the groove 13a provided at one end is provided with the above-mentioned structure. The pin 53 engages. The other end of the swing arm 13 has a first contact portion 13b and a second contact portion 13c that should contact the tension arm 11. The second contact portion 13c is formed in an arc shape with respect to the shaft 16 which is the rotation center of the swing arm 13.

Next, the operation of the magnetic tape loading device having the above configuration will be described. 11 and 14 are plan views showing a magnetic tape loading completion state.
Constitutes a tape path capable of recording / reproducing.
The tension arm 11 is in a loading position where tension control of the magnetic tape 40 can be performed.

When the unloading operation is started, the motor 121 rotates and the loading cam member 1 is passed through the deceleration transmission means 122.
23 starts rotating in the direction of arrow E in the figure. In response to the change from the inner circumference to the outer circumference of the cam groove 136, the arm 124 rotates in the direction of the arrow F in the drawing, and further, the first mode switching member 126 and the mode switching member 130 of the love 2 move in the arrow of the drawing. After moving in the G direction and the cam portions 126c and 133 provided on the first and second mode switching members 126 and 130 have passed the mode for performing the predetermined brake control, the tape unloading mode is set and the second mode is set. A pin 132 as an abutting portion provided on the mode switching member 130 abuts on a convex portion 113 as a driven portion at the end of the tension arm 11, and the tension arm 11
Is rotated clockwise in the figure. When the tension arm 11 reaches the intermediate standby position as shown in FIG. 12, the pin 125 erected on the arm 124 reaches the outermost concentric circle portion of the cam groove 136, and the arm 124, the first and second arms 124, The movement of the mode switching members 126 and 130 is stopped. Thus, the tension arm 11 moves from the loading position shown in FIG. 1 to the second position.
In the second movement range to the intermediate standby position shown in the figure, the first and second mode switching members 126 and 130 are used for movement.

Further, when the first loading cam member 123 rotates, the arm 62 moves in response to the change from the inner circumference to the outer circumference of the groove 138 provided in the loading cam member 123 as shown in FIG. Further, the loading transmission member 50 moves in the direction of the arrow K in the drawing, and the first and second racks 51, 52 on the loading transmission member 50 move the first transmission member 50 to the first position.
The driving force is transmitted to the second and second loading links 55 and 56, and the first and second tape guide blocks 4 and 5 are unloaded. It is rotated in the L direction, and the contact portion 13b at one end contacts the driven portion 114 at the end of the tension arm 11. Although the tension arm 11 rotates clockwise in the figure due to the contact with the swing arm 13,
The point of contact with the swing arm 13 is from the first contact portion 13b to the shaft 1
It moves to the concentric second contact portion 13c of 6. And the
The unloading position as shown in FIGS. 13, 15 and 17 is reached.

In this way, the tension arm 11 is moved by the swing arm 13 in the first movement range from the intermediate standby position shown in FIG. 12 to the unloading position shown in FIG.

Next, the loading operation will be described. From the state shown in FIGS. 13 and 15, the motor 121 starts rotating in the direction opposite to that at the time of unloading, and the loading transmission member 50 is moved via the arm 62 in the direction of arrow M in the figure.
Then, the tape guide blocks 4 and 5 start moving from the unloading position toward the first and second stoppers 6 and 7, and at the same time, the swing arm 13 rotates counterclockwise to move the tension arm 11 and the tension arm 11. The contacting part moves from the second contacting part 13c to the first contacting part 13b, and the tension arm 11 urged by the tension spring 15 follows the rotation of the swing arm 13 in the loading direction. Rotate. After rotating for a while, the intermediate standby position shown in FIG. 11 is reached, and when the convex portion 113 of the tension arm 11 contacts the pin 132, the rotation of the tension arm 11 is momentarily stopped. Further, when the loading cam member 123 rotates, the first and second mode switching members 126 and 130 move in the H direction in the drawing, and the tension arm 11 keeps the abutting relationship with the pin 132 and is reversed in the drawing. It rotates clockwise, and eventually the contact with the pin 132 separates to reach the loading position shown in FIG.

[Problems to be Solved by the Invention] In the conventional magnetic tape loading apparatus, a clockwise biasing force is applied to the pinch arm 190 by the spring force from the preload spring 191 at the unloading position to prevent vibration of the pinch arm 190. And its dedicated preload spring 191
There was a problem that they had to be prepared.

The present invention has been made to solve the above problems, and an object of the present invention is to obtain a magnetic tape loading device that does not require a dedicated preloading spring, reduces the number of parts, and reduces the manufacturing cost. To do.

[Means for Solving the Problems] A magnetic tape loading device according to the present invention includes a loading cam member provided on a chassis for obtaining a predetermined mode, and first and second guide holes formed on the chassis. First and second tape guide blocks that move, a tension arm that is rotatably provided on the chassis and that rotates between a loading position and an unloading position, and has an abutting portion, and one end of the tension arm. And a tension spring for urging the tension arm to the loading position and one end of which engages with the loading cam member and rotates in conjunction with the operation of the loading cam member and is pressed from the abutting portion. With a pinch arm and a capstan shaft attached to this pinch arm. And a pinch roller in contact therewith.

[Operation] In the magnetic tape loading device according to the present invention, the contact portion of the tension arm presses the preload receiving portion of the pinch arm at the unloading position.

[Examples] Examples of the present invention will be described below. FIG. 1 is a plan view showing an unloading state of the magnetic tape loading device showing the embodiment, and FIG. 2 is a plan view showing the back surface of the deck in the state shown in FIG. 17
The same or corresponding parts as those in the figure are designated by the same reference numerals and the description thereof is omitted.

In the figure, reference numeral 200 denotes a loading transmission member having a pin 201 which engages with a groove (not shown) of a loading cam member 123 at one end, and a tension arm 210 rotatable about a rotation shaft 211 at the other end. It has a pin 202 and a bent portion 203 for controlling the operation of. 212 is the tension arm 21
Tension pole provided at the tip of 0, 213 is a bent part
A first contact portion that contacts 203, a second contact portion that contacts the pin 202, 220 is a pinch arm having a pinch roller 221 at the end, and 222 is formed at the tip of the pinch arm 220. 3 is a preload receiving portion that abuts the abutting portion 215.

Next, the operation of the above configuration will be described. FIG. 2 is a plan view of the motor 12 when the loading operation is started.
1 starts rotating in the opposite direction to the unloading,
The loading cam member 123 rotates via the deceleration transmission means 122, the loading transmission member 50 moves in the direction of arrow P in the drawing via the arm 62, and the first and second tape guide blocks 4 and 5 are in the unloading position. Starts moving from the direction toward the first and second stoppers 6 and 7. At the same time, the loading transmission member 200 is moved in the O direction by the pin 201 engaged with the loading cam member 123, and the bent portion 203 comes into contact with the first contact portion 213 of the tension arm 210 (see FIG. 3). At the unloading position, the third contact portion 215 formed on the tension arm 210 presses the preload receiving portion 222 with the spring force of the tension spring 15, so that the pinch arm 220 vibrates at that position. There is no such thing.

Subsequently, the pinch arm 220 rotates clockwise in association with the rotation of the loading cam member 123, and the preload receiving portion 222 separates from the third contact portion 215, but the first contact portion 213 of the tension arm 210 does not move. It is in contact with the bent portion 203, and its rotation is restricted. In addition, the first and second tape guide blocks 4 and 5 are stopped (see FIG. 4).

Next, pinch arm 2 with tape guide blocks 4,5
The rotation of 20 also stopped halfway, and then the loading transmission member
When 200 moves in the Q direction, and as a result, the first contact portion 213 contacts the bent portion 203, the tension arm 210 starts rotating counterclockwise by the spring force of the tension spring 15 ( (See FIG. 5).

When the tension arm 210 continues to rotate counterclockwise by the spring force of the tension spring 15 as the loading transmission member 200 moves, the tip end of the tension arm 210 contacts the first tape guide block 4 and the tension arm 210 210 pushes the first tape guide block 4 with the spring force of the tension spring 15 (see FIG. 6), and then the second abutting portion 214 abuts the pin 202, so that the tension arm 210 cannot rotate counterclockwise. Stop (see Figure 7). In this state, the first and second tape guide blocks 4 and 5 have the first and second tape guide blocks 4 and 5, respectively.
Starts to move again in the direction of the stoppers 6 and 7 and comes into contact with the first and second stoppers 6 and 7, and the movement of the first and second tape guide blocks 4 and 5 is stopped (see FIG. 8). ).

The loading transmission member 200 moves in the direction of the arrow O, and as a result, the tension arm 210 rotates counterclockwise by the spring force of the tension spring 15 while the second contact portion 214 contacts the pin 202, and FF, Stop at the FR position (see Fig. 9). When the loading transmission member 200 further moves in the direction of the arrow O, the tension arm 210 moves the second contact portion 214.
The contact between the pin and the pin 202 is released and it becomes free,
Further, the rotation of the loading cam member 123 causes the pinch arm 220 to rotate in the clockwise direction so that the pinch roller 221 contacts the capstan shaft 223, and the magnetic tape is ready for recording and reproduction.

The loading operation and the unloading operation may be performed in the reverse order.

[Effects of the Invention] As described above, according to the magnetic tape loading device of the present invention, the contact portion of the tension arm presses the preload receiving portion of the pinch arm by the spring force of the tension spring at the unloading position. Since it has become
Since it is not necessary to align the springs dedicated to pressing the pinch arms, the number of parts can be reduced and the manufacturing cost can be reduced.

[Brief description of drawings]

FIG. 1 is a plan view showing an unloading state of a magnetic tape loading device showing this embodiment, and FIG.
A plan view of the back side of the deck in the state shown in FIG.
FIGS. 1 to 10 are plan views showing various aspects from an unloading position to a loading position, and FIGS. 11 to 13 are plan views showing various aspects of a conventional magnetic tape loading device, FIGS. 14 and 15. Is a plan view of the back side of the deck seen through from the front, FIG. 14 is a view at the loading position, FIG. 15 is an unloading position, FIG. 16 is an enlarged view of the main part at the intermediate standby position, and FIG. 17 is unloading. It is a principal part enlarged view in a position. 1 is a chassis, 2 and 3 are first and second guide holes, 4 and 5 are first and second tape guide blocks, 15 is a tension spring, 123 is a loading cam member, 210 is a tension arm, and 215 is a first arm. 3 abutment portion, 220 is a pinch arm, 221
Is a pinch roller, 222 is a preload receiving portion, and 223 is a capstan shaft. The same reference numerals in the drawings indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A loading cam member provided on a chassis for obtaining a predetermined mode, and a first cam formed on the chassis.
And first and second moving along the second guide hole
Tape guide block, a tension arm rotatably mounted on the chassis and rotatable between a loading position and an unloading position, and one end of the tension arm is attached to urge the tension arm to the loading position. The pinch arm is provided with a tension spring, a pinch arm that is engaged with the loading cam member at one end thereof and rotates in association with the operation of the loading cam member, and a pinch roller that is attached to the pinch arm and abuts on a capstan shaft. The magnetic tape loading device according to claim 1, wherein a preload receiving portion is formed on the arm, and an abutting portion formed on the tension arm presses the preload receiving portion at the unloading position.