JPS5935888Y2 - Movable tape guide device - Google Patents

Description

[Detailed description of the invention] This invention is a magnetic recording/reproducing device using a rotating magnetic head such as a video tape recorder, in which a magnetic tape in a tape cassette is taken out and inserted into a rotating drum containing a rotating magnetic head. This invention relates to a movable tape guide device.

FIG. 1 shows an outline of a general magnetic recording/reproducing apparatus of this type.

In FIG. 1, a rotating drum 2, which has rotating magnetic heads 1, 1 installed at equal angular intervals on its outer peripheral surface, is arranged on a substrate 3 at an angle of a predetermined angle. The upper part also includes a pair of inlet and outlet tape guides 4, 5, a fixed magnetic head 6 for recording and reproducing audio signals and rotation control signals, and a capstan 7 for driving the magnetic tape. A pinch roller 8 is arranged.

Further, the tape cassette 9 holds therein a set of supply and take-up reels 11 and 12 for winding the magnetic tape 10.
The tape guides 4, 5 and the capstan 7 are received in the notches 13, 14 and 15 formed in the side line portion, and are positioned and installed in a removable manner on the substrate 3, and the magnetic tape 10 is , internal guide pin 16
．． 16, and passes through each of these notches 13, 14, and 15f.

During magnetic recording and reproducing, the pair of inlet and outlet tape guides 4 and 5 move from the positional forces of the notches 13 and 14 to the non-set position l along the path indicated by the dotted line arrow. The magnetic tape 10 is wound around the outer peripheral surface of the rotary drum 2 over an angular range exceeding 180 degrees, and at the same time, the magnetic tape 10 is brought into contact with the surface of the fixed magnetic head 6, and the pinch roller 8 is used to wrap the magnetic tape 10. It is designed to be clamped to the capstan 7, and after magnetic recording and reproduction is completed, it is made to return to the non-set position again using this set position force.

In the running system for the magnetic tape 10 constructed in this way, a pair of inlet and outlet tape guides 4 and 5 are provided.
plays an extremely important role in loading the magnetic tape 10 onto the rotating drum 2.
High precision is required for positioning, and it is also necessary to interlock both guides with each other, and there are many difficulties in satisfying these conditions.

This invention attempts to provide a movable tape guide device that can satisfy the above conditions with simple mechanisms.Hereinafter, an embodiment of this invented device will be explained with reference to FIGS. 2 to 6. Explain in detail.

FIGS. 2 and 3 are plan views of the tape cassettes set in Example 1, FIG. 4 is a developed cross-sectional view of the main parts of the same, and FIGS. 5 and 6 are views of each tape cassette. This is a plan view of the state in which the guide has been moved, and in the figure, @
The same reference numerals as in FIG. 1 indicate the same or corresponding parts.

In FIGS. 2 to 6, a pair of inlet and outlet guide arms 17.18 have support shafts 19.20 fixed to each proximal end that are crossed with each other, and are connected to the base plate 3. It is pivotally supported on a shaft support so that it can swing freely, and when the input and exit side tape guides 4 and 5 are attached to each tip, the support shaft 19 is attached to the lower surface of the board 3. 2
01 The inlet side and outlet side drive arms 21 and 22 are integrally provided, and a spring 23) causes the inlet side guide arm 17 to always move clockwise, and a spring 24 causes the outlet side guide arm 18 to always move counterclockwise. By pulling these two arms 17, 18, the magnetic tape 10 is held in the non-set position (q position).

Further, on the lower surface of the substrate 3, a reversible rotary motor 25 and a screw shaft 26 pivotally supported by the respective bearings 2γ, 2γ are provided. The belt 30 is stretched between the motors 2 and 2.
The pin 3 screwed into the screw shaft 26 by forward and reverse rotation of 5.
2.32 is made to be able to reciprocate along this screw shaft 26, and the intermediate portion is attached to the support shaft 35.
Inlet side and outlet side swinging arms 33, 34+ each pivoted by 36 are provided, and elongated holes 37, 3 on each one end side thereof are provided.
B is engaged with each of the pins 32.32, and the other end side is caused to hit each of the drive arms 21.22 in succession by a spring 39.40, and the swinging action of both swinging arms 33.34 is The tape guides 4 and 5 of the guide arms 17 and 18 are moved from the non-set position to the i position and pressed against the inlet and outlet blocks 41 and 42 via the springs 3L40. ).

Therefore, in the configuration of the above embodiment, when the tape cassette 9 shown in FIGS. 2 and 3 is set on the substrate 3, the reversible rotary motor 25 is driven to rotate the screw shaft 26 in the forward direction. , inlet side and outlet side swing arms 33.34
The inlet side is actuated clockwise and the outlet side is actuated counterclockwise about the support shafts 35 and 36, respectively.
9°40 and against the traction force of springs 23,24,
Circumferential drive arm 21. 22. In turn, the inlet guide arm 17 is actuated clockwise and the outlet guide arm 18 is actuated counterclockwise, whereby the inlet and outlet tape guides 4, which are positioned within the notches 13, 14 of the tape cassette 9, 5 to pull out the magnetic tape 10 from the non-set position and move it toward the rotating drum 21.

Then, the tape guides 4 and 5 reach the respective entrance and exit blocks 41 and 42, and the magnetic tape 10 is wound and set on the outer peripheral surface of the rotating drum 2, and both guide arms 1
Even after 7 and 18 have stopped, both swing arms 33.34 continue to swing, and both springs 39.40 pull and store the force, so that each tape guide 4.5 is moved against each of these blocks 41.42. After applying force, the reversible motor 25 is stopped by a limit switch (not shown), and the magnetic tape 10 is pressed as shown in FIGS. 5 and 6.
This completes the set.

Further, from the state shown in FIGS. 5 and 6, the reversible rotary motor 25 is driven to reverse the screw shaft 26, contrary to the above.

Then, the return of the inlet and outlet side swinging arms 33 and 34 begins, and after the pressing force is released first, the inlet and outlet side guide arms 17 and 1 follow the return operation.
8 also begins to return due to the traction force of the springs 23, 24, and both tape guides 4, 5 leave the blocks 35, 36 with the magnetic tape 10 still attached, and finally, as shown in FIGS. 2 and 3, The magnetic tape 10 is returned to the non-set position, and at the same time, the reversible motor 25 is also stopped by the operation of a limit switch (not shown).

As detailed above, according to this invention, the magnetic tape in the tape cassette is pulled out from the non-setting position fJ) by the inlet side and outlet side tape guides, and is wound and set on a rotating drum equipped with a magnetic head. In a movable tape guide device of a magnetic recording/reproducing device, the tape guide device is configured to allow the tape to be moved from the set position to the non-set position. Attach the side and exit side tape guides, and use the traction force of the return spring to always hold these tape guides in the non-set position of the magnetic tape. Swinging arms on the inlet side and the outlet side are provided so as to be able to operate in conjunction with the pieces, and these two swinging arms are connected to the two guide arms through connection springs, respectively. , the movement of the inlet and outlet swinging arms in conjunction with the forward and reverse rotation of the screw shaft causes each guide arm to interlock, and the inlet and outlet tape guides are moved to the unset position.
At the set position, each tape guide can be pressed against its corresponding block by the traction force applied to the connecting spring. It is now possible to wind the tape with high precision and reliability, and the operation of both tape guides follows the operation of each swinging arm linked to the forward and reverse rotation of one screw shaft. The mechanism is extremely simple, and can be provided easily and at low cost.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the outline of a magnetic recording and reproducing apparatus to which this invented device is applied, and FIGS. 2 to 6 show the configuration of a magnetic recording and reproducing device to which an embodiment of this invented device is applied. Figures 3 and 3 are an overall plan view and a plan view of the mechanism when the magnetic tape is not set, Figure 4 is a developed sectional view of the main parts of the same mechanism, and Figures 5 and 6 are an overall plane view and a mechanism plan view when the magnetic tape is set. FIG. 3 is a plan view of the mechanism. DESCRIPTION OF SYMBOLS 1... Rotating magnetic head, 2... Rotating drum, 4 and 5... Entrance side and exit side tape guides, 7... Capstan, 9...・・・・・・
・Tape cassette, 10...Magnetic tape, 11
and 12... Supply and take-up reel, 17 and 18... Inlet side and outlet side guide arms, 19, 20... Support shaft, 21 and 22...
...Inlet side and outlet side, drive arm, 23 and 2
4...Return springs on the inlet and outlet sides, 25
...Reversible rotary motor, 26...Screw shaft, 31...Block, 33 and 34...Inlet side and outlet side swing arms, 35, 36・・・・・・
Support shafts, 39 and 40... connection springs on the inlet and outlet sides, 41 and 42... blocks on the inlet and outlet sides.

Claims (1)

[Scope of utility model registration request] In a magnetic recording and reproducing apparatus, a magnetic tape is pulled out and wound in a tape cassette by tape guides on the entrance and exit sides of a rotating drum equipped with an internal magnetic head. The side tape guides are attached to the guide arms on the inlet and outlet sides of the vent so that they can be operated around the spindle, and both tape guides are always held elastically in the non-setting direction by return springs, and are placed in the set position. is provided with blocks on the entrance side and exit side that press against both tape guides,
The pieces are rotated in the forward and reverse directions by a reversible rotary motor, and the pieces are connected to each other.Inlet side and outlet side swinging arms are provided, and these two swinging arms interlock the two guide arms via respective connection springs. A movable tape guide device characterized in that the tape guide device is designed to be flexible.