JP2706395B2 - Tape loading device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a position regulating post for regulating the position of the magnetic tape in the vertical direction with respect to the control head when the magnetic tape is brought into contact with the control head, and pulls out the magnetic tape. The present invention relates to a tape loading device used in a magnetic recording / reproducing device for fast-forwarding and rewinding the magnetic tape by forming a hard loading state by contacting the control head and the position regulating post.

[0002]

2. Description of the Related Art As shown in FIGS. 9 to 12, a conventional tape loading apparatus of this type is connected to a rotating shaft of a drive motor (not shown) through gears (not shown) or the like to rotate. A cam groove 2 is provided in a master cam 1 to be driven, and a cam follower shaft 4 that engages with the cam groove 2 is provided at one end of a drive shifter 3 driven by the rotation of the master cam 1. Slots 5a and 5b
The mechanical chassis 6 is provided with guide pins 7a and 7b which engage with the long holes 5a and 5b, the other end of the drive shifter 3 is provided with a long hole 8, and one end of the pullout lever 9 is provided with the long hole. A shaft 10 for engaging with the portion 8; a spring 11 for attaching one end to the mechanical chassis 6 at the center of the drawer lever 9 to bias the drawer lever 9 in a counterclockwise direction; The rotating shaft 1 is mounted on the mechanical chassis 6 via an E-ring 13 so that the rotating shaft 12 is rotatable.
2 is provided with a support shaft 14 for attaching the pull-out lever 9
Is provided with a pull-out shaft 17 for pulling out the magnetic tape 16 from the cassette 15 at the other end.

In the above configuration, the cam groove 2 of the master cam 1 is set so that the speed at which the magnetic tape 16 is pulled out is increased with the speeding up of the tape loading operation, and the vertical axis indicates the list amount (drive shifter). 3) and a change characteristic as shown in a cam diagram shown in FIG. 12 in which the rotation axis of the master cam 1 is plotted on the abscissa.
Extraction levers 9 in FIG. 9 rises at a high speed from the state shown by A ₂ in FIG 12 when in the position indicated by the solid line A _1, moves to the position extraction levers 9 of FIG. 9 indicated by the two-dot chain line B ₁ were changed to the state shown in B ₂ of FIG. 12 when, and forms a constant thereafter and becomes half loading state.

In the tape running path in the hard loading state, the magnetic tape 16 is
Position control having flanges 18a and 18b and a shaft 19 for guiding the audio signal and control signal recorded at the lower end of the audio control head 18 to be brought into contact with the audio control head 18 at an appropriate vertical height. The tape loading device configured as described above, which includes the post 20 and the drum device 21,
When the master cam 1 was rotated in the direction of arrow D by the rotation shaft of a drive motor (not shown) whose rotation speed was reduced by a gear (not shown) or the like, the master cam 1 was engaged with the cam groove 2 of the master cam 1. While the cam follower shaft 4 at one end of the drive shifter 3 slides, the guide pins 7a and 7 engaged with the long holes 5a and 5b at the center of the drive shifter 3 are provided.
b, the drive shifter 3 linearly moves in the direction of arrow E at a high speed according to the cam diagram, and the drive shifter 3
The shaft 10 of the tape pull-out lever 9 engaged with the long hole 8 of the other end of the pull-out lever slides, and the tape pull-out lever 9 rotates against the biasing force of the spring 11 at the center of the rotary shaft 12 of the pull-out lever 9. , So that the pull-out shaft 17 at the other end of the tape pull-out lever 9 is
The two-dot chain line from the position indicated by the solid line A ₁ B while hook 6
_The magnetic tape 16 is moved at a high speed to the position shown in FIG.
In this state, a half-loading state in which fast forward and rewind are performed to enable display of a linear time counter and cueing is performed.

Moreover, fast-forward, when performing the unloading of the operation stop of the half loading state in which the rewinding, the solid line A from the position shown the tape pull-out lever 9 by a two-dot chain line B ₁ in the above operation and reverse sequence _The magnetic tape 16 is moved to the position indicated by ₁ , and the magnetic tape 16 is stored in the cassette 15.

[0006]

However, in the above-described conventional tape loading apparatus, the speed at which the magnetic tape is pulled out is high, and the magnetic tape is brought into contact with the position regulating post while having a strong tension. The magnetic tape may hit the flange of the position regulating post violently and run on it, thus causing a problem of damaging the magnetic tape.

[0007]

A tape loading device according to the present invention uses a magnetic tape as a control head.
When making contact, the control head of the magnetic tape
Position regulation position that regulates the vertical height position with respect to the
Pull out the magnetic tape from the cassette and
Abuts the control head and the positioning post.
Tape loading to form a hard loading condition
The speed at which the magnetic tape is pulled out is reduced when the magnetic tape is brought into contact with the position regulating post.
A speed control means for changing the speed is provided.

[0008]

According to the tape loading device of the present invention, the magnetic tape is pulled out by the speed control means when the magnetic tape is brought into contact with the position regulating post. When the user slowly rides on the flange portion, it moves smoothly to the shaft portion, which is the predetermined position of the position regulating post, and thus can prevent the magnetic tape from being damaged.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the tape loading apparatus according to the present invention will be described below with reference to FIGS. 1 to 4. The same parts as those in the above-mentioned conventional example are denoted by the same reference numerals.

In the tape loading apparatus of the present invention, a cam groove 2 serving as a speed control means is provided on a master cam 1 which is connected to a rotating shaft of a driving motor (not shown) through a gear (not shown) or the like and rotates. The cam groove 2 is provided at one end of a drive shifter 3 driven by the rotation of the master cam 1.
The drive shifter 3 is provided with a long hole portions 5a and 5b at a center portion thereof, and a guide pin 7a which is engaged with the long hole portions 5a and 5b in the mechanical chassis 6.
, And 7b, and the other end of the drive shifter 3 has a slot 8
A shaft 10 is provided at one end of the pull-out lever 9 to engage with the long hole portion 8. One end is attached to the mechanical chassis 6 at the center of the pull-out lever 9, and the pull-out lever 9 is turned in a counterclockwise direction. A biasing spring (11), a rotating shaft (12), and a support shaft (14) for attaching the rotating shaft (12) to the mechanical chassis (6) via an E-ring (13) so that the rotating shaft (12) is rotatable; Cassette 1 at the other end of drawer lever 9
5 is provided with a pull-out shaft 17 for drawing out the magnetic tape 16.

In the above configuration, the cam groove 2 of the master cam 1 is shown in FIG. 4 in which the vertical axis represents the lift amount (movement distance of the drive shifter 3) and the horizontal axis represents the rotation angle of the master cam 1. A change characteristic as shown in a cam diagram shown in FIG.
Extraction levers 9 of rise in the same high speed as the conventional example from the state shown by A ₂ in FIG 4 when in the position indicated by the solid line A ₁ (indicated by a broken line), extraction levers 9 of FIG. 1 is a broken line C _As shown by ₁ , the magnetic tape 16 changes to the state shown by C ₂ in FIG. 4 when the magnetic tape 16 has been moved to a position immediately before contact with the position regulating post 20.
Extraction levers 9 is changed to the state shown in FIG 4 B ₂ when moving at slow speed to the position indicated by two-dot chain line B _1, and forms a constant thereafter and becomes half Rohde queuing state.

In the tape running path in the half-flowing state, the magnetic tape 16 is
Position control having flange portions 18a and 18b and a shaft portion 19 for guiding the audio signal and the control signal recorded at the lower end of the head so as to abut on an audio control head 18 at an appropriate vertical height. It comprises a post 20 and a drum device 21.

In the tape loading device constructed as described above, the master cam 1 is rotated in the direction of arrow D by the rotation shaft of a drive motor (not shown) whose rotation speed is reduced by a gear (not shown) or the like. And the master cam 1
The cam follower shaft 4 at one end of the drive shifter 3 engaged with the cam groove 2 is slidably moved.
Guide pin 7 engaged with long holes 5a and 5b at the center of
a and 7b, the drive shifter 3 linearly moves in the direction of arrow E by shifting according to the cam diagram, and the tape shift lever 9 engaged with the long hole 8 at the other end of the drive shifter 3 is moved. The shaft 10 slides, and the tape pull-out lever 9 is moved.
Rotates clockwise around the rotating shaft 12 at the center of the pull-out lever 9 against the urging force of the spring 11, so that the pull-out shaft 17 at the other end of the tape pull-out lever 9 holds the magnetic tape 16 with a solid line. moving at a high speed from the position shown by a ₁ to a position immediately before the contact with the magnetic tape 16 as indicated by the broken line C ₁ in the position regulating posts 20, then the position shown at slow speed two-dot chain line B ₁ , The magnetic tape 16 is slowly brought into contact with the audio control head 18 and the position regulating post 20, and a fast forward, which enables display of a linear time counter and cueing, is performed.
This forms a hard loading state in which rewinding is performed.

Further, fast-forward, when performing the unloading of the operation stop of the half loading state in which the rewinding, the solid line A from the position shown the tape pull-out lever 9 by a two-dot chain line B ₁ in the above operation and reverse sequence _The magnetic tape 16 is moved to the position indicated by ₁ , and the magnetic tape 16 is stored in the cassette 15.

In the structure of the above embodiment, the trajectory of the lift of the cam groove 2 of the master cam 1 from C ₂ to B ₂ is made longer to increase the rotation angle of the master cam 1. The rotation of the master cam 1 is limited by a rotation detector (not shown) or the like, and the following is another example of the tape loading apparatus of the present invention. An embodiment will be described with reference to FIGS.

The same parts as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted.

The cam groove 2 of the master cam 1 in the tape loading device of the present invention is shown in a cam diagram shown in FIG. 8 in which the vertical axis represents the lift and the horizontal axis represents the rotation angle of the master cam. is intended to have a change characteristics and will be described in more detail in FIG 8, a ₂ of FIG. 8 when the extraction levers 9 of FIG. 5 is in the position shown by the solid line a ₁
Moved from the state shown by rises faster than the conventional example (shown in broken lines), to a position immediately before is brought into contact with the position regulating posts 20 of the magnetic tape 16 as pulled out lever 9 of FIG. 5 indicated by the broken line C ₁ changes to the state shown by C ₂ of FIG. 8 when the next of FIG. 5 of the drawer the lever 9 is the Figure 8 when moving at slow speed to the position indicated by two-dot chain line B ₁ B ₂ It changes to the state shown by, becomes constant after that, and forms a hard loading state,
Therefore, in another embodiment of the tape loading apparatus according to the present invention, the speed at which the magnetic tape 16 is pulled out is adjusted by the rotation angle of the master cam 1 as in the conventional example. This can be slowed down.

In another embodiment of the tape loading apparatus of the present invention, a rotation position of a master cam having a cam groove similar to that of the above-mentioned conventional example is detected by a rotation position detector, and a predetermined rotation is performed. When the position is detected, the rotation speed of the master cam may be reduced by a brake unit serving as a speed control means, and the speed of drawing the magnetic tape may be reduced when the magnetic tape is brought into contact with the position regulating post. The dating device is not limited to the above embodiment.

[0019]

According to the tape loading device of the present invention having the above-described structure, the speed at which the magnetic tape is pulled out is changed so as to be slow when the magnetic tape is brought into contact with the position regulating post.
Let Accordingly, when the magnetic tape which rides slowly flange portion of the position regulating post, smoothly move in the axial portion which is a predetermined position of the position regulating post, thus preventing the damaging of the magnetic tape Can be . Also,
To the position just before the magnetic tape touches the position regulating post
Pulls out the magnetic tape at high speed.
Can reduce the time it takes to create
Noh.

[Brief description of the drawings]

FIG. 1 is an explanatory plan view showing one embodiment of a tape loading device of the present invention.

FIG. 2 is an explanatory front view of a main part showing a tape pull-out lever of one embodiment of the tape loading device of the present invention.

FIG. 3 is an explanatory front view of a main part showing a position regulating post of one embodiment of the tape loading device of the present invention.

FIG. 4 is a cam diagram of an embodiment of the tape loading device of the present invention.

FIG. 5 is an explanatory plan view showing another embodiment of the tape loading device of the present invention.

FIG. 6 is an explanatory front view of a main part showing a tape pull-out lever of another embodiment of the tape loading device of the present invention.

FIG. 7 is an explanatory front view of a main part showing a position regulating post of another embodiment of the tape loading device of the present invention.

FIG. 8 is a cam diagram of another embodiment of the tape loading device of the present invention.

FIG. 9 is an explanatory plan view showing a conventional tape loading device.

FIG. 10 is an explanatory front view of a main part showing a tape pull-out lever of a conventional tape loading device.

FIG. 11 is an explanatory front view of a main part showing a position regulating post of a conventional tape loading device.

FIG. 12 is a cam diagram of a conventional tape loading device.

[Explanation of symbols]

 2 Cam groove 16 Magnetic tape 18 Audio control head 20 Position regulation post

Claims (1)

(57) [Claims] To 1. A time of abutting the magnetic tape to control head includes a position restriction posts for regulating the position of the vertical height relative to the control head of the magnetic tape, pulled out the magnetic tape from the cassette, the control head and is brought into contact with the said position restricting post, the tape loading apparatus for forming a half-loading state, the speed of drawing out the magnetic tape, the speed control means for varying so as to slow down when brought into contact with the position restricting posts A tape loading device comprising: