JP3039063B2 - Tape slack winding mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape winding mechanism applied to a tape drive.

[0002]

2. Description of the Related Art FIG. 5 shows a so-called stamp-sized ultra-small tape cassette recently proposed and a cassette tape recorder for recording and reproducing the same. In FIG. 1, reference numeral 1 denotes a tape cassette, and a pair of tape reels 3 are rotatably accommodated in the tape cassette 1 corresponding to left and right reel drive shaft insertion holes 2 formed on the upper and lower surfaces thereof. A tape (magnetic tape) 4 is wound around a tape reel 3. The tape 4 wound around the tape reel 3 is guided to a front opening of the tape cassette 1 through a predetermined guide system in the tape cassette. It is closed.
That is, the lit 5 is attached to the front part of the tape cassette 1 so as to be rotatable up and down around the support shaft 6 as a fulcrum.
In the normal state (when the tape cassette is stored), this lid 5
When the tape cassette 1 is mounted on a cassette tape recorder to be described later, the lid 5 is opened or rotated upward or downward by a lid opening / closing mechanism in the cassette tape recorder, whereby the tape cassette 1 is rotated. The front opening is opened to expose the tape.

[0003] On the other hand, reference numeral 10 denotes a portable small cassette tape recorder for recording or reproducing data on or from the tape 4 in the tape cassette 1.
The open / close lid 11 is opened to mount the tape cassette 1 on a tape drive mechanism inside the cassette tape recorder 10. When the tape cassette 1 is mounted, the lid 5 of the tape cassette 1 is rotated in the opening direction by the lid opening / closing mechanism provided in the cassette tape recorder 10 as described above, and the tape is exposed.

When the play button 13 of the operation section 12 is pressed while the tape cassette is mounted, the tape drive mechanism is operated to perform normal running of the tape, and the magnetic head is moved from the front opening of the tape cassette 1 to the magnetic head. The drum is inserted and comes into sliding contact with the magnetic tape, whereby recording or reproduction play is performed. 14 is an FF (fast forward) button for performing a fast-forward operation of the tape,
Reference numeral 5 denotes a REW (rewind) button for performing a rewind operation.

Reference numeral 16 denotes a stop / eject button. By pressing the stop / eject button 16, the various tape running operations are stopped, and the tape cassette 1 is taken out of the cassette tape recorder 10 (eject operation). In this ejecting operation, the tape cassette 1 is taken out with the lid 5 opened and closed again by the lid opening / closing mechanism.

[0006]

In such a cassette tape recorder, when the tape is stopped from the running state of the tape, the tape becomes slack, and when the tape cassette is taken out, the slack occurs when the lid is closed. The tape may be pinched and the tape may be damaged. Further, if the tape is loose, the back tension of the tape is not initially applied during the next play, and thus a stable tape running state may not be obtained.

[0007] The present invention has been made in view of such a point,
An object of the present invention is to provide a mechanism capable of removing slack of a tape with a simple configuration, and to solve the above-mentioned problems.

[0008]

In order to achieve the above object, the present invention provides a slide member which operates in conjunction with an eject button for ejecting a tape cassette, and engages with a tape reel in the tape cassette. A transmission means for rotating the reel base in accordance with the movement of the slide member in the substantially linear direction, and when the eject button is pressed, the slide member is moved in the substantially linear direction in conjunction with the movement of the eject button, The reel unit is rotated in the tape winding direction of the tape cassette by the transmission means in accordance with the movement of the slide member.

[0009]

According to the above construction, the tape cassette is taken out in a state in which the slack of the tape has been wound up. Therefore, in the tape cassette having the lid, it is possible to prevent an accident that the tape is pinched when the lid is closed. In addition, since the back tension can be added to the tape from the beginning at the next play, a stable tape running state can be obtained.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In the drawing, reference numeral 20 denotes a reel base of a tape drive mechanism formed inside the cassette tape recorder 10. At the center of the reel base 20, a tape inserted into a reel drive shaft insertion hole of a tape cassette mounted on the cassette tape recorder is provided. Reel drive shaft 2 that engages with the reel
1 is protruded. A gear portion 22 is provided on an outer peripheral portion of the reel base 20, and a predetermined torque limiter mechanism (slip mechanism) is configured between the gear section 22 and the reel base 20 although not shown. I have.

Reference numeral 23 denotes a transmission gear constituting a transmission mechanism, and the transmission gear 23 is a gear portion 2 on the outer periphery of the reel base 20.
2 always meshes. Although not shown, a drive gear rotated by a drive motor meshes with the transmission gear 23 in accordance with the tape running mode, that is, the rotation of the drive gear is transmitted to the reel base 20 via the transmission gear 23 and the reel base 20 is rotated. Is driven to rotate so that the tape is wound on a tape reel and the tape runs. The transmission gear 23 is integrally formed with a small-diameter gear portion 23a that meshes with a rack portion of a slide plate described later.

On the other hand, 16 is a stop / eject button,
As described above, by pressing the stop / eject button 16, all tape running operations are stopped, and at the same time, the eject mechanism operates to take out the tape cassette from the cassette tape recorder 10. The stop / eject button 16 is always biased by a predetermined biasing means in a return direction, that is, in a direction protruding from the outer casing of the cassette tape recorder 10.

An operation plate 24 is integrally attached to the stop / eject button 16.
A slide plate 25 is disposed between the transmission gear 23 and the transmission gear 23. The slide plate 25 is supported by first and second shaft pillars 26 and 27 projecting from the mechanism board. That is, the slide plate 25 has first and second guide slots 28 and 29 having predetermined shapes. The first and second guide slots 28 and 29 are engaged with the first and second shaft columns 26 and 27, respectively, so that the slide plate 25 is fixed to the first and second shafts. The columns 26 and 27 are slidably supported within the lengths of the first and second guide slots 28 and 29.

In this configuration, the first guide slot 28
Is formed in a deformed hole shape having a width substantially equal to the diameter of the first shaft post 26 at only one end portion, and most of the other portion is formed to have a width larger than the diameter of the first shaft post 26. Long hole 29
Is formed to have a width substantially equal to the diameter of the second shaft column 27.
In addition, as is clear from FIG.
And 27 have flanges 26a and 2
7a is formed, the slide plate 25 is slidably supported while being mounted on the flange portions 26a and 27a, and is dropped by the washer 30 fitted to the upper end of the first shaft 26. Has been prevented.

A compression coil spring 32 is mounted between the washer 31 fitted to the upper end of the second shaft post 27 and the slide plate 25, and slides by the pressing force of the compression coil spring 32. The plate 25 is slid with respect to the second shaft 27 with a predetermined friction (friction).

At one end of the slide plate 25,
A rack portion 33 of the same module is formed corresponding to the small-diameter gear portion 23a of the transmission gear 23, and a protruding portion 34 is formed at the other end portion so as to protrude in a direction opposite to the rack portion 33, The slide plate 25 is connected to the operation plate 24 at the protrusion 34. The connecting portion between the operation plate 24 and the slide plate 25 is configured by engaging an engagement pin 35 projecting from the operation plate 24 with an engagement long hole 36 formed in the projection 34 of the slide plate 25. Have been.

Next, the operation of the mechanism constructed as described above will be described. When the stop / eject button 16 is not operated, as shown in FIG. 1, the slide plate 25 has the rack portion 33 at a position away from the small-diameter gear portion 23a of the transmission gear 23, that is, the rack portion 33 and the small-diameter gear portion 23a. Are not engaged, the transmission gear 23 and the reel base 20 can rotate freely.

When the stop / eject button 16 is pressed with a finger, the operation plate 24 moves integrally with the stop / eject button 16 as shown in FIG. Meshes with the small-diameter gear portion 23a of the transmission gear 23. Originally the slide plate 25 is the first
Since the width of the guide slot 28 is larger than the diameter of the first shaft 26, the guide shaft 28 can be rotated around the second shaft 27 as a fulcrum within the range of this difference. Due to the frictional loss caused by the compression coil spring 32 and the positional relationship between the guide position, the point of force, and the point of action, the rack portion 33 reliably linearly moves in a state of being engaged with the small-diameter gear portion 23a of the transmission gear 23.

As described above, the slide plate 25 is moved by the pressing force of the stop / eject button 16 while the rack portion 33 is meshed with the small-diameter gear portion 23a of the transmission gear 23. The reel base 20 is rotated through the rotation of the reel base 20 to take up the tape. Therefore, even if the tape is slack, the slack is removed, and in this state, the tape cassette is taken out of the cassette tape recorder by the operation of the eject mechanism by operating the stop / eject button 16.

After the ejection operation is performed in this way, when the finger is released from the stop / eject button 16 and the pressing is released, the stop / eject button 16 is returned to the initial position by a predetermined biasing means. The slide plate 25 is also moved following the return movement of the stop / eject button 16, but at this time, as shown in FIG.
The rack portion 33 is tilted and rotated about the second shaft 27 as a fulcrum in a direction away from the small-diameter gear portion 23a of the transmission gear 23 due to friction loss or the like caused by the compression coil spring 32, and returns while maintaining this state. Is done.

As described above, when the stop / eject button 16 returns, the slide plate 25 is connected to the rack 33 by the transmission gear 23.
The reel base 20 does not rotate in the reverse direction because the reel base 20 moves in a state of being separated from the small-diameter gear portion 23a. When the stop / eject button 16 is completely returned to the initial position, the slide plate 25 is guided by the first guide slot 28 and returns to the state shown in FIG.

[0022]

As is apparent from the above description, according to the present invention, the tape cassette is taken out with the slack of the tape wound up. Therefore, in the tape cassette having the lid, when the lid is closed, the lid sandwiches the tape. The tape can be protected well without any problem.
Further, by removing the slack in the tape, the back tension can be added to the tape from the beginning at the next play, so that the tape can run stably.
Further, the mechanism of the present invention has a structure in which the slack of the tape is wound up by using the force of pressing the eject button, so that the mechanism can be implemented with a simple component configuration without requiring power. It is highly effective when applied to a small cassette tape recorder or the like.

[Brief description of the drawings]

FIG. 1 is a plan view of an embodiment mechanism.

FIG. 2 is a plan view illustrating the operation of the embodiment mechanism.

FIG. 3 is a plan view illustrating the operation of the embodiment mechanism.

FIG. 4 is a sectional view taken along line AA of FIG. 1;

FIG. 5 is an explanatory diagram of a tape cassette and a cassette tape recorder.

[Description of Signs] 1 Tape cassette 3 Tape reel 4 Tape 10 Cassette tape recorder 16 Stop / eject button 20 Reel base 25 Slide plate 33 Rack unit

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G11B 15/00 G11B 15/18 G11B 15/675 101

Claims (1)

(57) [Claims] A slide member which operates in conjunction with an eject button for ejecting the tape cassette; and a reel base which engages with a tape reel in the tape cassette, in accordance with the movement of the slide member in a substantially linear direction. When the eject button is pressed, the slide member is moved in a substantially linear direction in conjunction with the movement of the eject button, and is transmitted by the transfer means with the movement of the slide member. A slack winding mechanism for a tape, wherein the reel base is rotated in a tape winding direction of the tape cassette.