JPH0419859A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To enable a tape cassette and a cylinder to be in utmost contiguity with each other in a position where a reel is engaged with a reel base by winding a tape around one part of a prescribed tape winding part of the cylinder only by inserting the tape cassette into a cassette holder and keeping this state in the engagement position of the reel and the reel base as well. CONSTITUTION:The above mechanism consists of the cassette holder 12 for holding and guiding the tape cassette 1 housed with the magnetic tape and the cylinder 6 provided with the tape winding part 18 to be wound with the magnetic tape, whereas only by inserting the tape cassette 1 into the cassette holder 12, the magnetic tape is wound around one part of the tape winding part 18 of the cylinder 6. In such a way that the tape is wound around one part of the prescribed tape winding part 18 of the cylinder 6 only by inserting the tape cassette 1 into the cassette holder 12, and this state is kept in the engagement position of the reel and reel base as well, the tape cassette 1 and the cylinder 6 can be brought into utmost contiguity with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a tape cassette mounting mechanism in a magnetic recording and reproducing apparatus that records and reproduces signals by winding a tape pulled out from a tape cassette around a cylinder.

2. Description of the Related Art In recent years, there has been a demand for further miniaturization of helical scan type video cassette recorders (hereinafter abbreviated as VCR), and in order to meet this demand, efforts have been made to miniaturize each part.

Among these, how close the tape cassette can be to the cylinder is one of the items that should be particularly considered in reducing the size of the VcR. It is important to devise a tape cassette mounting mechanism in order to narrow the gap between the tape and the cylinder when the tape cassette is mounted and bring the tape cassette and cylinder closer together.

The tape cassette mounting mechanism of a conventional magnetic recording/reproducing apparatus will be explained below.

FIG. 11 is a side view of a conventional magnetic recording/reproducing apparatus at a position where a tape cassette is inserted.

In Fig. 11, 1 is a tape cassette, 2 is a cassette holder, 3 is a lid lock release piece, 4 is a lid opening member, 5 is a chassis, 6 is a cylinder, 7 is a cylinder mounting screw, 8 is a post, and 9 is a pinch roller. , 10 is the reel stand,
11 is a reel lock release bin.

The operation of the magnetic recording/reproducing apparatus configured as described above will be described below. cylinder 6 is chassis 5
It is fixed with cylinder mounting screw 7. The cassette holder 2 is at a position where the tape cassette 1 can be inserted, and at this position the tape cassette 1 is inserted in the direction of arrow A.

The tape cassette 1 advances toward the back along a cassette guide plate 2a provided on the cassette holder 2. Table Kase Soto 1
Close the lid lock 1 of tape cassette 1 before the end of insertion.
a comes into contact with a lid lock release piece 3 provided on the cassette holder 2, and when the insertion is completed, the lid lock 1a is released. Furthermore, at the same time as the insertion is completed, a cassette lock mechanism (not shown) locks the tape cassette 1 into the cassette holder 2.
locked against.

FIG. 12 and FIG. 13 are a side view and a plan view, respectively, of a main part of a conventional magnetic recording/reproducing device at a position where a reel and a reel stand engage with each other. Cassette holder 2 of tape cassette 1
After inserting the cassette into the cassette, press the cassette holder 2 to
The cassette holder 2 containing the tape cassette 1 rotates about the support shaft 2b against the biasing force of a holder biasing spring (not shown). During this rotation, the cassette lid 1b
The end face of the lid opening member 4 comes into contact with the lid opening member 4 fixed to the chassis 5, and is gradually pushed up. The rotation of the cassette holder 2 continues until the position where the reel 1c and the reel stand 10 engage, and at the position where the reel 1c and the reel stand 10 engage, a cassette holder locking mechanism (not shown) locks the cassette holder 2 into the chassis 5. locked against. At this time, the cassette lid 1b is opened, the post 8 and the pinch roller 9 are inserted into the bottom opening 1d of the tape cassette 1, and the reel lock release bin 11 is inserted into the reel lock release hole 1e on the bottom of the tape cassette 1. etc. are carried out,
Tape cassette 1 is loaded.

After this, the tape 1f is pulled out and wound around the cylinder 6.

Problems to be Solved by the Invention However, in the conventional configuration described above, the cylinder is fixed to the chassis when the cassette holder rotates about the support shaft after the tape cassette has been inserted into the cassette holder. It is stationary, and relative movement occurs between the tape cassette and the cylinder other than in the tape cassette front-back direction. During this relative movement, a gap is always provided between the tape and the cylinder to prevent the edge of the tape from hitting the corner of the cylinder or the magnetic head attachment part of the cylinder, causing fatal damage to the tape. There is a need. Furthermore, it is necessary to provide this gap with a sufficient margin in consideration of the case where the tape becomes slack.

For this reason, the tape cassette and the cylinder cannot be brought close enough to each other at the position where the reel and the reel stand engage, resulting in a problem that further miniaturization of the vCR cannot be achieved.

The present invention solves the above-mentioned conventional problems, and provides a magnetic recording/reproducing device that allows a tape cassette and a cylinder to be brought as close as possible to each other at a position where a reel and a reel stand engage without damaging the tape. With the goal.

Means for Solving the Problems To achieve this object, the magnetic recording and reproducing apparatus of the present invention is provided with a cassette holder for holding and guiding a tape cassette containing a magnetic tape, and a tape winding section for winding the magnetic tape. The present invention is characterized in that the magnetic tape is wound around a part of the tape winding portion of the cylinder simply by inserting the tape cassette into the cassette holder.

Effect of the Invention With the above-described configuration, the present invention wraps the tape around a part of the predetermined tape winding portion of the cylinder simply by inserting the tape cassette into the cassette holder, and maintains this state even at the position where the reel and the reel stand engage. This allows the tape cassette and cylinder to be brought as close as possible to each other at the position where the reel and reel stand engage without damaging the tape.

EXAMPLE An example of the present invention will be described below with reference to the drawings.

1 to 3 are side views of a magnetic recording/reproducing apparatus in an embodiment of the present invention at a position where a tape cassette is inserted. However, FIGS. 2 and 3 only show the main parts to avoid complication.

In FIG. 1, 12 is a cassette holder, 13 is a lid lock release member, 14 is a lid release member, 15 is a reel lock release member, and 1B and 17 are tension springs.

The cylinder 6 is fixed to the cassette holder 12 with a cylinder mounting screw 7.

The cassette holder 12 is in a position where the tape cassette 1 can be inserted, and the tape cassette 1 is inserted in the direction of arrow B at this position. The tape cassette 1 moves toward the back along the cassette guide plate 12a provided on the cassette holder 12.
In the process, the cassette lid 1b is opened, the reel IC is unlocked, and the tape 1f is wound around the cylinder 6. Each operation will be explained below.

First, opening of the cassette lid 1b will be explained. FIG. 4 is a side view of essential parts of the lid opening mechanism. When the tape cassette 1 is inserted, the lid lock 1a comes into contact with the protrusion 13a, and the lid lock 1a is released. When the tape cassette 1 is further inserted, the reel lock release member 15 urges the lid lock release member 13 in the direction of arrow C.
The lid lock release member 13 moves together with the tape cassette 1 while sliding on the cassette guide plate 12a against the tension of the tension spring 16 stretched between the tape cassette 1 and the cassette guide plate 12a. As the lid lock release member 13 moves, the bottle 13b protruding from the lid lock release member 13 moves within the elongated hole 14a of the lid release member 14. Lid opening member 14
is pivotally attached to the reel lock release member 15 by a support shaft 14b, and a lid opening pin 14c is protruded from its free end so as to be in contact with the opening surface of the cassette lid 1b, so that the pin 13b moves inside the elongated hole 14a. By moving the support shaft 14
The lid opening member 14 moves from the position shown by the solid line to the position shown by the two-dot chain line to open the cassette lid 1b. FIG. 2 is a side view of the magnetic recording/reproducing apparatus at this time.

Next, regarding unlocking of reel 1c, see Figures 5 and 7.
This will be explained using figures.

FIG. 5 is a side view of essential parts of the reel lock release mechanism. The reel lock release member 15 is a U-shaped member, and is supported by the cassette holder 12 on both sides. Although this support is shown only on one side in the figure, the protruding bottle 15a,
This is done by loosely fitting the bottles 15b into the guide grooves 12C1 and 12d, respectively. The lock release member 1 is a chamber into which the tape cassette 1 is further inserted from the position shown in FIG.
5 is the tension of the tension spring 17 stretched between the cassette holder 12 so as to bias the reel lock release member 15 in the direction of arrow C when the protruding piece 15c and the lower front surface 1g of the tape cassette 1 come into contact with each other. against pin 15a, pin 1
5b are guided by the guide grooves 12C9 and 12d, respectively, and move together with the tape cassette 1. Since the guide groove 12c consists of only a portion parallel to the direction of arrow B, and the guide groove 12d consists of a portion parallel to the direction of arrow B and a portion inclined to the direction of arrow B, the reel lock release member 15 initially moves in the direction of arrow B. A combined movement of parallel movement to and rotation about the bottle 15a is performed. As a result, the reel lock release bin 15d protruding from the reel lock release member 15 is gradually inserted into the reel lock release hole 1e. Then, when the reel lock release member 15 moves to the position shown by the two-dot chain line, that is, the position where the pin 15b only moves parallel to the arrow B direction, the reel IC is completely unlocked.

Note that while the reel lock release member 15 moves, the positional relationship between the lid release member 14 and the cassette lid 1b changes. This is due to the movement of the reel lock release member 15 to which the lid opening member 14 is pivoted by the support shaft 14b.
This is because there is a component of rotation around a. As a result, the position of the support shaft 14b of the lid opening member 14 shown in FIG. 4 changes, and the cassette lid 1b is slightly closed from the open state. will continue to be maintained.

Next, winding of the tape 1f around the cylinder 6 will be explained.

When the reel lock release member 15 moves to the position indicated by the two-dot chain line in FIG. 5, the reel 1c is unlocked and the tape 1f and the cylinder 6 start coming into contact. When the tape cassette 1 is further inserted from that position, the tape 1f is pulled out while being wound around the cylinder 6. At this time, since the tape cassette 1 moves only in the direction of arrow B, an unreasonable force is applied to the tape 1f, and the tape 1f may be damaged.
f is wound almost uniformly in the width direction while being in contact with the tape winding portion of the cylinder 6. This winding is continued until the pin 15a comes into contact with the end of the guide groove 12c and insertion of the tape cassette 1 is completed, and at the position where the insertion of the tape cassette 1 is completed, the magnetic recording/reproducing apparatus is in the state shown in FIG. . Also,
At the same time as the insertion is completed, the tape cassette 1 is locked to the cassette holder 12 by a cassette locking mechanism (not shown).

FIGS. 6 and 7 are a side view and a plan view, respectively, of a main part of a magnetic recording/reproducing apparatus according to an embodiment of the present invention at a position where a reel and a reel stand engage with each other. After the tape cassette 1 is inserted into the cassette holder 12, by pressing the cassette holder 12, the cassette holder 12 containing the tape cassette 1 is rotated against the biasing force of a holder biasing spring (not shown). Rotation is performed using 12b as a fulcrum. The rotation of the cassette holder 12 continues until the reel 1c and the reel stand 10 engage, and at the position where the reel 1c and the reel stand 10 engage, a cassette holder locking mechanism (not shown) locks the cassette holder 12 into the chassis 5. locked against. At this time, the boss 8 and the pinch roller 9 are inserted into the bottom opening 1d of the tape cassette 1, and the tape cassette 1
is installed. Thereafter, the tape 1f is further drawn out by the movement of the tape drawing means (post 8), and the tape 1f is completely wrapped around the cylinder e.

The movement when the tape cassette 1 is installed has been described above, but it can be considered that when the tape cassette 1 is removed, the movement is the reverse of the movement when the tape cassette 1 is installed. However, since the reel 1c is unlocked and the tape 1f is wound around the cylinder 6 at the time of installation, it is necessary to wind up the wound tape 1f before locking the reel 1c when taking out the cylinder. This tape winding mechanism will be explained below.

FIG. 8 is a plan view of the main part of the tape winding mechanism at a position where the tape cassette 1 is locked to the cassette holder 12. The tape winding member 18 is pivotally attached to the cassette guide plate 12a by a support shaft 18b, and a friction member 18c made of rubber or the like is attached to the free end of the tape winding member 18 in a position that does not interfere with the engagement between the reel IC and the reel stand 10. Further, the tape 1f is pulled out from the tape cassette 1 and wound around a part of a predetermined tape winding portion of the cylinder 6. Cassette lock mechanism (
(not shown) is removed, the reel lock release member 15 moves in the direction of arrow C by the tension of the tension spring 17. Since the reel lock release member 15 has a protruding pin 15e that engages with the notch 18a of the tape winding member 18, the tape winding member 18 is moved as the reel opening/vine release member 15 moves. Rotate counterclockwise about the support shaft 18b until the pin 15e and the notch 18a are no longer engaged. At this time, in the tape cassette 1, the front lower part 1g is the protruding piece 1.
Since it is in contact with 5c, it moves in the same way as the reel lock release member 15. During movement, the friction member 18c comes into contact with the bottom surface of the reel 1c that is seen from the bottom of the tape cassette 1, causing the reel 1c to rotate counterclockwise, thereby winding up the tape 1f.

FIG. 9 is a plan view of the main part of the tape winding mechanism at the position where the rotation of the tape winding member 18 ends.

After the tape winding member 18 has rotated to the position shown in FIG.
When the pin 15e is removed from the notch 18a, the position restriction by the pin 15e is no longer possible, but the lid lock release member 13 slides on the cassette guide plate 12a, moves in the direction of arrow C, and comes into contact with the tape winding member 18. Therefore, the tape winding member 18 is prevented from rotating clockwise. This rotation prevention by the lid lock release member 13 is performed throughout the period when the position of the tape winding member 18 is no longer restricted by the engagement between the pin 15e and the notch 18a. Furthermore, a projecting piece 12e is provided on the cassette holder 12 to prevent the tape winding member 18 from rotating counterclockwise, and the tape winding member 18 is eventually moved from the position shown in FIG. After rotating to the position shown in the figure, it will be locked in the position shown in FIG. Tape winding member 18
At the end of rotation, the reel 1c is not yet locked, and the bottom surface of the reel 1c is in contact with the friction member 18c, so that even when the tape cassette 1 moves in the direction of arrow C thereafter, the reel IC is locked. The reel 1c rotates counterclockwise until the tape 1f is completely wound.

FIG. 10 is a perspective view of FIG. 8.

The tape winding mechanism when taking out the tape cassette 1 has been described above, but when it is attached, the movement is opposite to when it is taken out. That is, the tape winding member 18 rotates the reel IC in the opposite direction to the winding direction of the tape 1f to slacken the tape 1f.

Since the amount is approximately the same as the amount of wrapping of the tape 1f around the cylinder 6 at the time of mounting, there is no need to rotate the reel 1c due to the contact force between the tape 1f and the cylinder 6 at the time of mounting. Also, after installing tape cassette 1,
Considering that even if f is slack, the tape 1f is further pulled out and completely wrapped around the cylinder 6, the tape winding member 18
There is no particular problem in letting it slack.

In addition, in the embodiment, the cylinder 6 is the cassette holder 1.
This is because there is only one chassis 5 and the cassette holder 12 rotates, whereas the first chassis has two chassis 5 and the cassette holder 12 is fixed and does not move. If the second chassis is movable on which the reel stand 10 is mounted, the cylinder 6 may be arranged in the first chassis.

Effects of the Invention As described above, the present invention comprises a cassette holder that holds and guides a tape cassette containing a magnetic tape, and a cylinder provided with a tape winding portion for winding the magnetic tape, and the cylinder is provided with a tape winding portion for winding the magnetic tape. By simply inserting the tape cassette into the cassette holder, the magnetic tape is wound around a part of the tape winding portion of the cylinder. By wrapping a tape around a portion of the reel and maintaining this state even at the position where the reel and reel stand engage, it is possible to bring the tape cassette and cylinder as close as possible at the position where the reel and reel stand engage. Since the width of the tape cassette of the VCR in the front-rear direction can be shortened by the close distance, the VCR can be made smaller.

In addition, even if the tape is wrapped around the cylinder when the tape cassette is inserted, no movement other than the tape cassette back and forth direction occurs between the tape and the cylinder during the whole process of attaching and detaching the tape, so the tape will not be damaged, making it a safe tape cassette. It can be said that it is a mounting mechanism.

[Brief explanation of the drawing]

1 to 3 are side views of a magnetic recording/reproducing apparatus according to an embodiment of the present invention at a position where a tape cassette is inserted, FIG. 4 is a side view of a main part of a lid opening mechanism in the same embodiment, and FIG. 5 FIG. 6 is a side view of a main part of the reel lock release mechanism in the same embodiment. FIG. 7 is a side view of the main part of the magnetic recording and reproducing apparatus in the same embodiment at a position where the reel and reel stand engage, respectively;
A plan view, FIGS. 8 and 9 are plan views of essential parts of the tape winding mechanism in the same embodiment, and FIG. 10 is a perspective view of FIG. 8.
FIG. 11 is a side view of a conventional magnetic recording and reproducing device at a position where a tape cassette is inserted, and FIGS. 12 and 13 are main parts of a conventional magnetic recording and reproducing device at a position where a reel and a reel stand engage, respectively. They are a side view and a plan view. 1...Tape cassette, 6...Cylinder, 12
...Cassette holder, 13.. Lid lock release member, 14.. Lid release member, 15..
- Reel lock release member, 18... tape winding member. Name of agent: Patent attorney Shigetaka Awano (1 person) Figure Figure Figure 10! , 1 1 Mu Qi Diagram 12th page 13th figure

Claims (2)

[Claims] (1) Consisting of a cassette holder that holds and guides a tape cassette containing a magnetic tape, and a cylinder provided with a tape winding section for winding the magnetic tape, the cylinder can be opened by simply inserting the tape cassette into the cassette holder. 1. A magnetic recording and reproducing device, wherein the magnetic tape is wound around a part of a tape winding section. (2) a cassette holder that guides and holds a tape cassette containing a magnetic tape; a cylinder installed in the cassette holder and equipped with a rotating magnetic head; Inserting the tape cassette, comprising a lid opening means for opening the lid of the cassette, and a reel lock release means for rotating the reel in the tape cassette in conjunction with the second insertion stroke operation of the tape cassette. A magnetic recording/reproducing device characterized in that, upon completion of an operation, the magnetic tape is wound around a part of the tape winding portion of the cylinder.