JPH0437313Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Field of industrial application) The present invention is a tape player that uses a cassette with a lid, such as a video deck or a digital audio tape player, to fast forward and rewind the tape (hereinafter referred to as It relates to a mechanism for fast winding (collectively referred to as "fast winding"), and in particular a fast winding post that pulls out the tape from the cassette and guides it during fast winding.
This invention relates to a mechanism for moving a cassette from a stored position in a cassette to a drawn-out position for use.

(Prior Art) In a tape player that uses a cassette tape with a lid, it is necessary to pull out the tape from the cassette during play or fast winding.
For this purpose, a fast-winding post is used. This fast-winding post is inserted into the tape inner part of the cassette when the cassette is completely installed in the tape player. This state is called the storage position of the fast-winding post, and after the cassette has been installed, the fast-winding post continues to move from the storage position toward the outside of the cassette, and the tape is moved into the cassette until it is in the play or fast-winding position. It is something that is drawn from.

Conventionally, in order to pull out the quick-winding post after the cassette has been installed, a spring is used to constantly bias the quick-winding post in the pull-out direction, and when the cassette is not installed, it is forced against the force of this spring. The quick-winding post is locked on the storage side. After the cassette has been installed, the lock is released and the quick-winding post is moved to the drawn-out position by the force of the spring.

(Problem that the invention aims to solve) As mentioned above, the conventional quick-winding post pull-out mechanism uses the force of a spring to pull out the quick-winding post, and then uses the same spring force to maintain the position of the quick-winding post. It's tottering.

By the way, not only does the fast-winding post require the force required to pull out the tape from the cassette, but also a fairly strong tape tension is applied to the reel during fast-winding. A strong pull-out spring is required to prevent the post from returning.

However, when such a strong spring is used, when returning the quick-winding post from the pulled out position to the original storage position, the quick-winding post must be moved against this spring, which increases the driving force. An inconvenience occurs that requires and,
Such an increase in driving force leads to an increase in the size of the motor and an increase in power consumption, which prevents tape players from being made smaller and more labor-saving.

The present invention solves the problems of the conventional technology as described above, reduces the driving force required to store and pull out the quick-winding post, and makes it possible to reduce the size of the tape and save labor. The purpose is to provide a mechanism.

[Structure of the invention] (Means for solving the problem) The pull-out mechanism for the quick-winding post of the present invention has a quick-winding post that is rotatably supported between a storage position and a pull-out position. The control member is provided with a spring that urges the quick-winding post toward the storage side, and the control member takes different positions when the quick-winding post is pulled out and when it is stored. It is engaged by a cam that holds it in position.

(Function) In the present invention having the above configuration,
The spring installed on the fast-winding post is simply to return the fast-winding post to the storage position, and there is no need for the spring to overcome the tension during tape winding or to pull the tape out of the cassette. , it becomes possible to use a spring with extremely weak force compared to the conventional type.

On the other hand, the pulling out operation of the quick-winding post is performed by a cam that engages with a control member moved by a drive mechanism, but in this case, the spring force acting as resistance only needs to be extremely weak as mentioned above. Less driving force is required.

Further, the locking of the quick-winding post in the drawn-out position is performed by a cam that engages with a control member, and since this control member is linked to a drive means such as a motor, the cam also locks after the drive means stops. It does not move and can sufficiently absorb the tape tension applied to the fast-winding post.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows the fast-winding post in the storage state of the fast-winding post pull-out mechanism of this embodiment, and FIG. 2 shows the same pulled-out state.

Structure of Embodiment In this embodiment, two fast winding posts 1a and 1b are provided on the tape winding side and the tape feeding side with a predetermined interval maintained therebetween. The quick-winding posts 1a, 1b are fixed perpendicularly to the tips of support arms 3a, 3b which are rotatably attached to support shafts 2a, 2b provided on a base plate of a tape player (not shown). Note that this post may be a simple guide rod or a guide roller.

Cams 4a and 4b are fixed to the lower ends of each of the support shafts 2a and 2b. In this example, fast-winding post 1
The drawing directions of a and 1b are symmetrical, and the tips of each post are drawn out so that they open on both sides.
The shapes of the cams 4a, 4b also differ accordingly.

First, the cam 4a on the right side of the figure has a sector-like shape as a whole, and a cam surface is formed on the front side of the cam 4a. Further, a stopper 5a for regulating the rotation range of the cam is formed at the tip on the opposite side from the cam surface. On the other hand, the cam 4b on the left side of the figure is an arm-shaped member having a narrower width than the cam on the right side, and has a cam surface formed on its rear edge, contrary to the cam on the right side.

On the other hand, the stopper 5b that restricts the rotation of the left cam 4b is connected to the support arm 3b of the left quick-winding post.
The support shaft 2a is formed to protrude on the opposite side with the support shaft 2a in between. Further, this left cam 4b has a locking portion 6b that locks the end of the early winding post return spring.
is provided.

Return springs 7a and 7b are attached to each of the quick-winding posts 1a and 1b and their cams 4a and 4b, which are integrated via a support shaft as described above, and which bias the fast-winding posts toward the storage side. . In this embodiment, the springs 7a and 7b are torsion springs in which the ends of the coil portion protrude on both sides. That is, in the right side fast-winding post 1a, a coil part of a spring 7a is fitted around the support shaft 2a, one end of which is locked to a locking part 6a provided on the support arm 3a of the fast-winding post, and the other The end is locked to a pin 8a on the board of the tape player. On the other hand, the left spring 7b is
This coil portion is fitted onto the outer periphery of the support shaft 2b, and one end thereof is locked to a locking portion 6b formed on the cam 4b. Further, the other end is locked to a guide post of a control member, which will be described later.

The control member 9 for rotating the left and right cams 4a, 4b is a narrow plate-like member disposed in the width direction of the tape player, and has guide holes 10a, 10b formed near both ends thereof. Guide posts 11a, 11b fixed to the tape player board inside
By inserting the tape player, it is supported so as to be movable in its length direction (width direction of the tape player).
This control member 9 is provided with pressing portions 12a, 12b facing the cam surfaces of the respective cams 4a, 4b, and the movement of the pressing portions 12a, 12b causes the respective cams 4a, 4b to rotate. .

A rack 13 is formed at one end of the control member 9, and a gear 14 is meshed with the rack 13, which is rotated by a driving means such as a motor.

Furthermore, the guide post 11a of this control member 9
However, when the fast-winding post is stored, the stopper 5a provided on the right cam 4a also serves as a positioning member for the cam that comes into contact. Further, a positioning member 15, which is contacted by a stopper 5b provided on the support arm 3b when storing the left fast-winding post, is provided independently on the board of the tape player.

Effects of the Embodiment In this embodiment having the above-described configuration, when the cassette is not installed, the left and right quick-winding posts 1a and 1b are in the storage position as shown in FIG. In this state, when the cassette is mounted on the tape player, the gear 14 on the drive mechanism side rotates.
The control member 9 moves to the left in the figure.

Then, the left and right pressing parts 12a and 12b provided on the control member 9 press the cam surfaces of the left and right cams 4a and 4b, so the right cam 4a moves clockwise in the figure and the left cam 4b counterclockwise. The left and right quick-winding posts 1a, 1b rotate to the spindle 2.
The tape is opened left and right around a and 2b and rotated from the storage position to the draw-out position, and the tape is pulled out from the inside of the cassette to the quick-wind position by the movement of the fast-winding posts 1a and 1b. In this case, the quick-winding posts 1a, 1
The pull-out resistance of the tape and the force of the return springs 7a and 7b of the fast-winding post are applied to b, but as mentioned above, the force of the return springs 7a and 7b is extremely light, so a particularly large drive is required. The quick-winding post can be moved to the extended position without the need for force.

When the drive mechanism is stopped after the quick-winding posts 1a, 1b have moved to the drawn-out position, the control member 9 and its pressing portions 12a, 12b will stop at that position, and the cams 4a, 4b pressed by them will also stop at that position. Locked in position. As a result, even if tension is applied to the posts during fast winding of the tape, the fast winding posts 1a, 1b cannot return to the storage position, and the fast winding posts are reliably positioned.

When storing the tape in the cassette, the drive mechanism is driven in the opposite direction to the above, and when the gear 14 is rotated in the opposite direction, the control member 9 moves to the right in the figure. Then, since the pressing force from the pressing portions 12a, 12b disappears, the cams 4a, 4b and the left and right quick-winding posts 1a, 1b that interlock with the cams 4a, 4b become free. However, since the left and right fast-winding posts 1a, 1b are provided with return springs 7a, 7b, the fast-winding posts 1a, 1b rotate in the opposite direction to the above and move toward the storage position. in this case,
Since there is no resistance to the movement of the quick-winding posts 1a, 1b, the force of the return springs 7a, 7b is extremely weak, and naturally, the driving force of the drive mechanism that moves the control member 9 to the return position is also reduced. Less is enough.

The quick-winding posts 1a, 1b rotated by the force of the return springs 7a, 7b, so that the stoppers 5a, 5b provided on the cam 4a or the support arm 3b are connected to the positioning member (guide post 11a) on the tape player side.
or positioning member 15) on the tape player board
The storage position is determined by contacting the storage position.

〓Other Embodiments As shown in the above embodiments, in the present invention, the quick-winding post is pulled out by a cam provided in the control member, and the fast-winding post is retracted by the force of the return spring. However, it is not necessarily limited to this example.

For example, it is also possible to use a normal coil spring as the return spring.

Further, the control member does not need to be a single member, and the cam can be rotated by a plurality of members that interlock with each other.

Furthermore, the rotation directions of the left and right quick-winding posts can be made the same, or in some cases, the number of fast-winding posts can be one.

[Effects of the invention] As described above, in the fast-winding post pull-out mechanism of the present invention, the tension during fast-winding of the tape is received by the control member that works with the cam, so the spring required to take in and out the fast-winding post is reduced. The force required is weak, and the driving force required to move the fast-winding post in and out is reduced accordingly, making it possible to downsize the tape player and save labor. In particular, the present invention exhibits the following unique effects due to such a configuration.

[1] When the fast-winding post is in the pulled-out position, the control member, cam, and fast-winding post are integrated and have rigidity, so the fast-winding post will not move even under strong tape tension.

[2] After the quick-winding post reaches the storage position with the control member and cam, the force of the spring pulls the quick-winding post into the storage position, so there is a slight gap between the control member, the cam, and the quick-winding post. Even if there are errors or wobbles, the spring force will ensure that the quick-winding post is accurately positioned at the storage position.

In particular, in this type of tape player, the fast-winding post is inserted into the cassette, so if its storage position is not set accurately,
When loading and exiting a cassette, there is a risk that the fast-winding post may hit the cassette or the tape and cause damage, but the present invention eliminates such inconvenience.

[Brief explanation of the drawing]

The drawings are plan views showing an embodiment of the fast-winding post pull-out mechanism of the present invention, with FIG. 1 showing the fast-winding post in a stored state and FIG. 2 showing the fast-winding post in a pulled-out state. 1a, 1b...fast winding post, 2a, 2b...
Support shaft, 3a, 3b...Support arm, 4a, 4b...
...Cam, 5a, 5b...Stopper, 6a, 6b...
... Locking part, 7a, 7b ... Return spring, 8
a...Pin, 9...Control member, 10a, 10b...
...Guide hole, 11a, 11b...Guide post,
12a, 12b...Press portion, 13...Rack, 1
4... Gear, 15... Positioning member.

Claims (1)

[Scope of Claim for Utility Model Registration] a. A quick-winding post rotatably supported between a storage position and a pull-out position. b. A control member and its driving means that take different positions when the quick-winding post is pulled out and when it is retracted. c. A cam that engages with the control member and moves the quick-winding post from the stowed position to the pulled-out position in accordance with its movement position. d. A spring that urges the quick-winding post toward the storage position and pulls the quick-winding post into the storage position after the quick-winding post reaches the storage position and the control member and cam are separated. A quick-winding post pull-out mechanism characterized by having the above constituent requirements a to d.