JPH1040613A - Tape driving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tape driving device capable of reducing the rotation load and the unevenness of rotation of a capstan and a pinch-roller by the low press-contacting force of the pinch-roller and also capable of preventing the damage of a film coated part of the capstan caused by a cassette tape set in a cassette holder. SOLUTION: A main guide surface C for specifying the position of the cassette tape in the running state (2nd position) of a magnetic tape and an auxiliary guide surface D for positionally controlling the cassette tape in the midst of turning to the 2nd position are formed on a reference pin 11a inserted to a positioning hole 7d of the cassette tape 7. The auxiliary guide surface D abuts on the positioning hole 7d in the midst of turning to the 2nd position as shown in the figure (a), and the movement of the cassette tape 7 is controlled, then the inner wall surface of a capstan accepting hole 7b does not abut on the capstan 2. Thus, the damage of the film coated part 2b is evaded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape drive for handling a cassette tape in which a magnetic tape is loaded in a cassette tape outer case.

[0002]

2. Description of the Related Art In a tape drive device, a pinch roller 1 supported by a pinch roller shaft (not shown) can be pressed against a capstan 2 as shown in FIG. The magnetic tape 3 is run at a constant speed by being held between the capstan 2 and the pinch roller 1 and rotating the capstan 2 at a constant speed by a motor (not shown).

In order to stabilize the running, a surface processed portion 2a is formed in which the contact surface of the capstan 2 with the magnetic tape 3 is roughened by etching or the like to increase the friction coefficient.
A certain level of tape driving force is secured by the pressure force of the pinch roller 1.

[0004]

However, a dramatic improvement in the coefficient of friction of the capstan 2 cannot be expected only by forming the above-mentioned surface-processed portion 2a, so that the pressing force of the pinch roller 1 is made relatively large. A certain level of tape driving force is secured.

[0005] For this reason, there has been a problem that the rotation load is increased between the capstan 2 and the bearing (not shown), and between the pinch roller 1 and the pinch roller shaft (not shown), and rotation unevenness occurs. .

Therefore, it is conceivable that the coefficient of friction of the capstan 2 is drastically improved in order to secure a constant level of tape driving force even if the pressing force of the pinch roller 1 is small.

As a specific example, as shown in FIG. 6, it is conceivable to provide a coating portion 2b filled and coated with a slip prevention coating agent on the contact surface of the capstan 2 with the magnetic tape 3. However, in this case, the following new problem occurs.

When the cassette tape 7 is set on the cassette holder 6 on which the magnetic head 4 and the pinch rollers 1 and 1 are mounted as shown in FIG. 7, the cassette tape outer case 7a of the set cassette tape 7 is set.
Are upper claws 6a, 6a and lower claws 6b,
6b. Next, move the cassette holder 6 to the arrow A
The cassette holder 6 is pivoted about the shaft 8 by protruding as shown by the arrow, and the cassette tape 7 is moved to a position where the magnetic tape 3 can run and used. When this type of mechanism is adopted, the cassette tape outer case 7a collides with the coating portion 2b of the capstan 2 when the cassette tape 7 moves, and the coating portion 2b
A condition that may damage the device may occur.

In FIGS. 7 and 8, capstans 2 and 2 are provided on the take-up reel 9 side and the supply reel 10 side, respectively. Reference numerals 11a and 11b are reference pins on the take-up reel 9 side. Is a reference pin on the supply reel 10 side.

The reference pins 11a and 11b are formed of a synthetic resin material, are engaged with the substrate 15, and are integrally attached to the substrate 15. In the running state of the magnetic tape 3, the capstans 2, 2 are inserted into the capstan receiving holes 7b, 7c of the cassette tape outer case 7a,
The reference pins 11a and 11b are inserted into positioning holes 7d and 7e of the cassette tape outer case 7a.

When the cassette tape 7 is set in the cassette holder 6 and the cassette holder 6 is rotated from the state shown in FIG. 9A to the state shown in FIG. 9B, the reference pins 11a and 11b The cassette tape 7 is positioned by being inserted into the positioning holes 7d and 7e of the tape outer case 7a.

More specifically, the guide surfaces C of the reference pins 11a and 11b are changed from the state shown in FIG. 9A to the positioning holes 7d of the cassette tape outer case 7a as shown in FIG. 9B. , 7e, it is elastically deformed and urges the cassette 7 toward the magnetic head 4 by its spring pressure. The movement of the cassette 7 due to the bias is regulated by the wall surface 7f of the cassette tape outer case 7a to define the position of the cassette 7.

However, from the state shown in FIG.
On the way to the state shown in FIG. 10B, as shown in FIGS. 10A and 10B, a state occurs in which the cassette tape 7 is displaced in the direction of removing the cassette tape 6 from the cassette holder 6 (the direction of arrow B). Sometimes. In this case, FIG.
As shown in (a), the inner wall surfaces of the capstan receiving holes 7d and 7e come into contact with the coating portion 2b of the capstans 2 and 2, and the coating portion 2b is damaged.

According to the present invention, there is provided a tape capable of reducing the rotational load and rotational unevenness of the capstan and the pinch roller with a low pinch roller pressing force, and in which the cassette tape set in the cassette holder does not damage the coating portion of the capstan. It is an object to provide a driving device.

[0015]

According to the tape driving device of the present invention, the cassette holder is turned to the magnetic tape running state separately from the main guide surface which defines the position of the cassette tape outer case in the magnetic tape running state on the reference pin. An auxiliary guide surface is formed to abut the cassette tape outer case set in the cassette holder in the middle of movement and to regulate the position so that the cassette tape outer case does not contact the capstan capstan. According to the present invention, even when a coating portion coated with a slip prevention coating agent is formed on the capstan, the coating portion can be prevented from being damaged, and the capstan and the capstan can be formed with a low pinch roller pressing force. The rotation load and rotation unevenness of the pinch roller can be reduced.

[0016]

According to a first aspect of the present invention, there is provided a tape driving device for moving a magnetic tape loaded in a cassette tape outer case while nipping the magnetic tape between a capstan and a pinch roller. The first to mount the cassette tape case
And a second position in which the magnetic tape can run, and a cassette holder rotatable between the second position and the second position.
And a reference pin having a main guide surface for defining the position of the cassette tape outer case set in the cassette holder at the position (2), and the reference pin is rotated from a first position to a second position. An auxiliary guide surface is formed to abut the cassette tape outer case set in the cassette holder in the middle and to regulate the position so that the inner wall surface of the capstan receiving hole formed in the cassette tape outer case does not contact the capstan. It is characterized by the following.

According to a second aspect of the present invention, in the tape drive device according to the first aspect, a contact surface of the capstan with the magnetic tape includes
It is characterized in that a coating portion coated and coated with a slip prevention coating agent is provided.

According to a third aspect of the present invention, in the tape drive device according to the first aspect, a contact surface of the capstan with the magnetic tape includes
It is characterized in that a plurality of coating portions filled and coated with a slip preventing coating agent are provided.

Hereinafter, embodiments of the present invention will be described with reference to FIGS.
It will be described based on. The arrangement of the capstans 2 and 2 and the reference pins 11a and 11b provided on the take-up reel 9 side and the supply reel 10 side are shown in FIG.
It is the same as that of

(Embodiment 1) FIGS. 1 to 3 show (Embodiment 1). This (Embodiment 1) is different from the configuration shown in FIG. 7 only in the shape of the reference pins 11a and 11b as follows.

FIG. 1A shows the relationship between the reference pin 11a and the positioning hole 7d when the cassette holder 6 is at the first position for attaching and detaching the cassette tape 7, and FIG. The relationship between the reference pin 11a and the positioning hole 7d when the holder 6 is at the second position for running the magnetic tape loaded in the cassette tape outer case 7a is shown.

The reference pin 11a includes not only the main guide surface C for defining the position of the cassette tape outer case 7a when the cassette holder 6 arrives at the second position immediately before the cassette holder 6 arrives at the second position, but also in the drawing. In No. 1, an auxiliary guide surface D extending further upward from the main guide surface C is formed.

By comparing FIG. 9 (b) and FIG. 1 (b), the section of the auxiliary guide surface D of the reference pin 11a (Embodiment 1) becomes clearer. Further, the cassette holder 6 is the first holder shown in FIG.
The relationship between the cassette tape outer case 7a and the reference pin 11a in the process of rotating from the position of FIG. 1 to the second position shown in FIG. 1B will be described with reference to FIGS. Make configuration clearer.

FIGS. 2A and 2B show the cassette holder 6.
The relationship between the reference pin 11a and the positioning hole 7d immediately after the rotation of the reference pin 11a from the first position toward the second position,
And the relationship between the capstan 2 and the capstan receiving hole 7b. In this state, the reference pin 11a
Of the auxiliary guide surface D is in a state immediately before engaging with the positioning hole 7d.

FIGS. 3A and 3B show the cassette holder 6.
Shows the relationship between the reference pin 11a and the positioning hole 7d and the relationship between the capstan 2 and the capstan receiving hole 7d in a state where the reference pin 11a is further rotated toward the second position from the state shown in FIGS. 2A and 2B. ing. In this state, the auxiliary guide surface D of the reference pin 11a engages with the positioning hole 7d as shown in FIG. 3A, and the cassette tape outer case 7a set in the cassette holder 6 moves in the direction of arrow B. It is regulated not to.

In other words, it can be said that the auxiliary guide surface D of the reference pin 11a is formed in a shape substantially along the locus of the positioning hole 7d when the cassette 7 moves on a normal locus.

Therefore, as shown in FIG. 3B, the capstan receiving hole 7 is formed in the coating portion 2b of the capstan 2 (specifically, a coating of a urethane resin material having a high friction coefficient).
The inner wall surface of b does not contact.

As described above, the coating portion 2 b is formed on the capstan 2.
Even if the case is provided, the cassette tape outer case 7
The coating portion 2b is not damaged by a, and a fixed level of tape driving force can be obtained even if the pressing force of the pinch roller 1 is made smaller than before by providing the coating portion 2b on the capstan 2. Can be

(Embodiment 2) FIG. 4 shows (Embodiment 2)
The pinch roller 1 and the capstan 2 are shown, and the other parts are the same as those in the above (Embodiment 1).

This (Embodiment 2) capstan 2
Is formed by filling a plurality of grooves 12a, 12a with a urethane-based resin material having a high friction coefficient to form coatings 12b, 12b. The width L1 of the outermost ends of the plurality of coating portions 12b, 12b is configured to be small within the range of the width L2 of the magnetic tape 3, and both ends 3a, 3b in the width direction of the magnetic tape 3 are formed by the metal portions 2c , 2d. The central portion 3c of the magnetic tape 3 is provided with a plurality of coating portions 12b,
It contacts the metal part 2e between 12b.

With this configuration, a constant level of tape driving force can be obtained even when the pressing force of the pinch roller 1 is further reduced as compared with the case of the first embodiment. Further, since the auxiliary guide surface D is formed on the reference pin 11a in the same manner as in the first embodiment, the cassette tape outer case 7a is set on the cassette holder 6 and moves from the first position to the second position. The capstan receiving hole 7b does not damage the coating portions 12b.

In the above (Embodiment 1) and (Embodiment 2), the case of the reference pin 11a has been described. However, in the case of the double capstan, the main guide surface C and the auxiliary guide surface D are also provided on the reference pin 11b. The intended purpose can be attained by providing.

[0033]

According to the first aspect of the present invention, the position of the cassette tape outer case in the magnetic tape running state (second position) is defined for the reference pin inserted into the positioning hole of the cassette tape outer case. The main guide surface and the second
And an auxiliary guide surface for regulating the position so that the inner wall surface of the capstan receiving hole formed in the cassette tape outer case does not come into contact with the capstan in contact with the cassette tape outer case in the middle of rotating to the position. Did
During the rotation to the second position, it is possible to prevent the cassette tape set in the cassette holder from being displaced in the direction in which it comes into contact with the capstan.

According to the second aspect of the present invention, since the capstan of the first aspect is provided with the coating portion filled with the anti-slip coating agent on the contact surface with the magnetic tape, the auxiliary guide surface of the reference pin is provided. According to the first aspect, it is possible to prevent a situation in which the cassette tape set in the cassette holder contacts the coating portion of the capstan and damages the coating portion during the rotation to the second position.

According to the third aspect of the present invention, since the capstan of the first aspect is provided with a plurality of coating portions filled with a coating agent for preventing slipping on the contact surface with the magnetic tape, the reference pin has During rotation of the auxiliary guide surface to the second position, a situation in which the cassette tape set in the cassette holder contacts the plurality of coating portions of the capstan and damages the plurality of coating portions may occur. Can be avoided.

[Brief description of the drawings]

FIG. 1 is a side view of a partially cut-out state when a cassette holder is in a first position and in a second position according to the first embodiment.

FIG. 2 is a perspective view of the cassette holder according to the embodiment;
Side view of the main part immediately after turning from the position shown in FIG.

FIG. 3 shows a cassette holder according to the embodiment shown in FIG.
Side view of the main part in a state further rotated from the state shown in

FIG. 4 is a side view showing a capstan according to a second embodiment.

FIG. 5 is a side view showing a conventional capstan.

FIG. 6 is a side view of a capstan obtained by improving the capstan of FIG. 5;

FIG. 7 is an external perspective view of a tape drive using the capstan of FIG. 6;

FIG. 8 is an external perspective view showing a state where a cassette tape is set in a cassette holder.

9 is a side view of the tape drive of FIG. 8 with the cassette holder rotated to a first position and a second position in a partially cutaway state.

10 is a partially cutaway side view showing the relationship between the capstan and the cassette tape outer case during the rotation of the cassette holder from the first position to the second position in the tape driving device of FIG. 8;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pinch roller 2 Capstan 3 Magnetic tape 2b Film part filled and coated with anti-slip coating agent 4 Magnetic head 6 Cassette holder 7 Cassette tape 7a Cassette tape outer case 7b, 7c Capstan receiving hole 7d, 7e Positioning hole 9 Take-up reel 10 Supply reel 11a, 11b Reference pin C Main guide surface D Auxiliary guide surface

Claims (3)

[Claims] 1. A tape drive device for running a magnetic tape loaded in a cassette tape outer case while nipping the magnetic tape between a capstan and a pinch roller, wherein a first magnetic head and a pinch roller are mounted and a cassette tape outer case is attached and detached. And a second position in which the magnetic tape can run. The cassette holder is rotatable. The cassette holder is inserted into the positioning hole of the cassette tape outer case and set in the cassette holder at the second position. A reference pin having a main guide surface for defining a position of the cassette tape outer case; and a cassette tape outer set on the reference pin on a cassette holder being rotated from a first position to a second position. The cap formed on the cassette tape outer case in contact with the case Stan receiving hole tape drive the inner wall surface to form an auxiliary guide surface for regulating the position so as not to contact the capstan. 2. The tape drive device according to claim 1, wherein a coating portion filled with a slip prevention coating agent is provided on a contact surface of the capstan with the magnetic tape. 3. The tape drive according to claim 1, wherein a plurality of coating portions filled with a slip prevention coating agent are provided on a contact surface of the capstan with the magnetic tape.