JPH05182314A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To provide the magnetic recording and reproducing device capable of contriving thin formation of a VCR by eliminating the need of a bottom plate in one part by making a cassette stopper movable to a cassette holder and then increasing a space capable of arranging parts underneath a cassette loading position. CONSTITUTION:The device is equipped with a cassette holder 1 for holding a tape cassette 36 and the cassette stopper 36 arranged in this cassette holder 1 to control an inserting amt. of the tape cassette 36 into the cassette holder 1 by abutting the tape cassette 36. The cassette stopper 35 is moved by moving a driving pin 17 via a link mechanism between a 1st position where the cassette stopper 35 is abutted against the tape cassette 36 and a 2nd position where the abutting is not carried out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording and reproducing apparatus for recording and reproducing signals by winding a magnetic tape drawn from a tape cassette on a cylinder.

[0002]

2. Description of the Related Art In recent years, in a helical scan type video cassette recorder (hereinafter referred to as VCR), there is a demand for downsizing of an apparatus, and in order to meet the demand, downsizing of each part has been attempted. Among them, how to reduce the overall thickness by reducing the thickness of the member that affects the thickness, changing the layout, or replacing it with another one is one of the items that should be particularly considered in downsizing the VCR. is there. It is important to devise a cassette mounting mechanism as one means for reducing the thickness.

The structure of a conventional VCR will be described below with reference to FIGS.
This will be described with reference to FIG. As shown in the figure, the cassette holder 41 includes a top plate 42, side plates 43 and 44 formed by bending on both sides thereof, bottom plates 45 and 46 in which the side plates 43 and 44 are respectively bent inward, and bottom plates 45 and 46.
Is integrally formed with cassette stoppers 47 and 48 which are bent upward in front of the above, and a leaf spring 49 is attached to the top plate 42. In addition, the chassis 50
Is folded at the ends to form the cassette guide 51,
The chassis 50 includes a lid opening pin 52 and a cylinder 5.
3. Height determining pins 54 and 55 and positioning pins 56 and 57 are fixed. Then, the tension control lever 58 is provided rotatably around a shaft 59 fixed to the chassis 50, and the tension control lever 58 is provided on the bottom plate 4.
It has a positional relationship that overlaps with 5.

Regarding the VCR constructed as above,
The operation will be described below. At the cassette insertion position shown in FIG. 6, the tape cassette 60 is placed in the cassette holder 4
1 is inserted in the direction of arrow A until it comes into contact with the cassette stoppers 47 and 48. At this time, the tape cassette 60 is elastically biased toward the bottom plates 45 and 46 by the action of the plate spring 49, and the height in the cassette holder 41 is determined. Next, the cassette holder 41 is pushed down to the cassette mounting position shown in FIG. By this operation, the lid opening pin 52 is moved to the tape cassette 6
The lid 61 of 0 is contacted and rotated to open the lid. When the lid 61 is opened, the tape cassette 60 tries to move in the cassette holder 41 due to its reaction force, but at that time, since the cassette guide 51 is already in the position of contacting the rear surface 62 of the tape cassette 60, the inside of the cassette holder 41 is closed. The position of the tape cassette 60 does not change. In addition to this role, the cassette guide 51 also plays a role of correcting the tape cassette 60 during the movement to the cassette mounting position when the tape cassette 60 is not completely inserted into the cassette holder 41 at the cassette insertion position. In the cassette mounting position shown in FIG. 7, the tape cassette 60 abuts on the height determining pins 14 and 15 and the positioning pins 56 and 57 are inserted to uniquely determine the position and height with respect to the chassis 50. When the tape cassette 60 is mounted, the magnetic tape 63 is pulled out by the tape loading mechanism (not shown) to move the magnetic tape 63 to the cylinder 53.
The signal is recorded and reproduced by being wound around. At this time, the tension control lever 58 comes into contact with the magnetic tape 63 and rotates around the shaft 59 so as to keep the tension constant.

[0005]

In such a conventional structure, the cassette stoppers 47 and 48 are provided in the cassette holder 4.
Since it is integrally formed with 1, the portion connecting the bottom plates 45 and 46 to the cassette stoppers 47 and 48 is inevitably necessary. Further, although the functions of the cassette stoppers 47 and 48 are unnecessary at the cassette mounting position, the cassette stoppers 47 and 48 cannot be moved with respect to the cassette holder 41. For this reason, the tension control lever 58, which is in a positional relationship where it overlaps with the bottom plate in the plan view, cannot be arranged immediately below the tape cassette 60 at the insertion position, and one bottom plate 45 and 46 should be separated from the tape cassette 60. I have no choice. This is common not only for the tension control lever 58 but also for all the parts arranged in the part of the bottom plates 45 and 46, which further influences the related part arrangement. Therefore, there is a problem that the thickness of the VCR increases and the effective component arrangement is hindered.

The present invention is to solve the above-mentioned problems. By making the cassette stopper movable with respect to the cassette holder, a part of the bottom plate is eliminated, and a space for arranging the parts under the cassette mounting position is increased to reduce the VCR. The first object is to reduce the thickness. A second object is to simplify the structure by sharing the moving mechanism of the cassette stopper with respect to the cassette holder with the lid opening mechanism of the tape cassette.

[0007]

In order to achieve the first object, the first means of the magnetic recording / reproducing apparatus of the present invention is a cassette holder for holding a tape cassette, and the cassette holder is arranged in the cassette holder. A cassette stopper that comes into contact with the tape cassette to regulate the amount of insertion of the tape cassette into the cassette holder, and between the first position where the cassette stopper comes into contact with the tape cassette and the second position where it does not come into contact. A moving means for moving is provided.

In order to achieve the second object, the second means of the magnetic recording / reproducing apparatus of the present invention is a cassette holder for holding a tape cassette, and a lid of the tape cassette arranged in the cassette holder. A lid opening means for opening is provided, and a cassette stopper is provided integrally with the lid opening means for abutting against the tape cassette and restricting an insertion amount of the tape cassette into the cassette holder.

[0009]

According to the present invention, by the structure of the above-mentioned first means, it is possible to eliminate a part of the bottom plate while performing the function of a cassette stopper that regulates the amount of insertion of the tape cassette into the cassette holder at the cassette insertion position. ..

Further, with the configuration of the second means described above, the lid opening mechanism and the cassette stopper moving mechanism can be shared.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

As shown in the drawing, the cassette holder 1 comprises a top plate 2, side plates 3 and 4 bent on both sides thereof, and bottom plates 5 and 6 formed by bending the side plates 3 and 4 inward. It is configured as one. A leaf spring 7 is attached to the top plate 2, and a support pin 8 is provided on the side plate 3 to rotatably support a lid opening lever 9.
The lid opening lever 1 has a lid opening pin 1
0 is integrally provided, and its tip is bent to form a cassette stopper 11. Also, the support pin 8
A torsion spring 12 is wound on the side plate 3 at one end thereof.
1 and the other end is put into a hole 14 formed in the lid opening lever 9 so that the lid opening lever 9 can be opened.
It is biased to rotate counterclockwise. Further, the counterclockwise rotation of the lid opening lever 9 is restricted by the bent portion 15 contacting the bent portion 13 of the side plate 3, and the first link 16 is prevented.
Has a drive pin 17 at its end.

The chassis 18 has its end portion bent to form a cassette guide 19 and also bent in another direction to form a link support portion 20, and the first link 16 is provided at the link support portion 20 at one end. The fulcrum pin 21 is rotatably mounted, and the drive pin 17 is slidably fitted in the guide groove 22 with the side plate 3 sandwiched therebetween at the other end. In contrast to the first link 16, the second link 23 has a guide pin 24 slidably fitted in the guide groove 25 with the link support portion 20 sandwiched between the one end and the side plate 3 at the other end. Fulcrum 26
Is rotatably attached to. Furthermore, the first link 16
The second link 23 and the second link 23 are centrally coupled by a coupling pin 26, whereby the cassette holder 1 can vertically approach and separate from the chassis 18. And the first link 1
The cassette holder 1 is biased in a direction to separate from the chassis 18 by a tension spring 27 stretched between the side plate 3 and the side plate 3, and the guide pin 17 abuts against the end of the guide groove 22 when the cassette is inserted. And is locked at the position shown in FIG. The description of the cassette lifting mechanism is limited to one side, but the other side has the same configuration.

The chassis 18 has a cylinder 2
8. Height determining pins 29 and 30, positioning pins 31 and 32
Is fixed. Further, the tension control lever 34 is rotatable around a shaft 33 fixed to the chassis 18.

Further, since the cassette stopper 35 is rotatably supported by the support pin 8 provided on the side plate 3, the bottom plates 5 and 6 are provided.
The portion close to the cylinder 28 is unnecessary, and the tension control lever 34 does not have a positional relationship overlapping the bottom plate 5.

Regarding the VCR constructed as above,
The operation will be described below. At the cassette insertion position shown in FIG. 3, the tape cassette 36 is placed in the cassette holder 1.
Insert it in the direction of arrow A until it contacts the cassette stopper 11. At this time, the tape cassette 36 is elastically urged toward the bottom plate 5 by the action of the leaf spring 7, and the height in the cassette holder 1 is determined. Next, the cassette holder 1 is manually pushed down to the cassette mounting position shown in FIG. 4 against the urging force of the tension spring 27 toward the chassis 18 side. This operation drives pin 17
Moves from the right end to the left end of the guide groove 22. At this time, the lid opening lever 9 with which the drive pin 17 abuts rotates clockwise in FIG. 4 while twisting the torsion spring 12. When the lid opening lever 9 rotates, the lid opening pin 10 contacts the lid 37 of the tape cassette 36, and the lid opening pin 10 rotates to open the lid. When the lid 37 is opened, the tape cassette 36 tries to move in the cassette holder 1 due to its reaction force, but at that time, since the cassette guide 19 is already in a position in contact with the rear surface 38 of the tape cassette 36, the inside of the cassette holder 1 is closed. Tape cassette 36 in
The position of does not change. Further, like the lid opening pin 10, the cassette stopper 35 also rotates and moves to a position where there is no hindrance to the drawing of the magnetic tape 39. At the cassette mounting position shown in FIG. 4, the tape cassette 36 has the height determining pin 25.
And the positioning pin 31 is inserted to uniquely determine the position and height with respect to the chassis 18. When the tape cassette 36 is loaded, a magnetic tape 39 is pulled out by a tape loading mechanism (not shown) and wound around the cylinder 28 to record and reproduce signals. At this time, the tension control lever 34 moves the magnetic tape 3
It contacts 9 and rotates about the shaft 33 to keep the tension constant.

Although the cassette stopper 35 is rotated in the embodiment, it is only necessary to move the cassette stopper 35 to a position at which the magnetic tape 39 is not pulled out at the cassette mounting position. It is possible to take a route. Further, the drive pin 17 provided on the first link 16 rotates the lid opening lever 9,
The drive system of the lid opening lever 9 can be variously modified. Further, the cassette stopper 11 has the same structure on both sides of the cassette holder 1, but only one may rotate and the other may be fixed to the cassette holder 1.

As described above, according to the magnetic recording / reproducing apparatus of the present invention, the cassette holder 1 for holding the tape cassette 36.
And a cassette stopper 3 which is disposed in the cassette holder 1 and contacts the tape cassette 36 to regulate the amount of insertion of the tape cassette 36 into the cassette holder 1.
5 and moving means for moving the cassette stopper 35 between a first position in which the tape cassette 36 contacts the tape cassette 36 and a second position in which the tape cassette 36 does not contact the tape cassette 36. And cassette stopper 3
It is possible to make the position of 5 with respect to the cassette holder 1 different. Further, since the cassette stopper 35 is moved, the bottom plates 5 and 6 of the cassette holder 1 do not need to be connected to the cassette stopper 35, and a part of the bottom plates 5 and 6 is unnecessary. As a result, the space in which the parts can be placed is increased, and by making effective use of this, the VCR can be made thinner. The space where the cassette stopper 35 moves at the cassette mounting position is the same height as the tape cassette 36 and is a dead space.
The space generated by removing parts of the bottom plates 5 and 6 is a space having a height lower than that of the tape cassette 36 and having a high arrangement density of components such as tape loading. In this sense, moving the cassette stopper 35 is a VCR. It can be said that it is very effective for thinning. Another effect is that the conventional cassette holder has a problem that the cassette stopper interferes with the positioning of the tape cassette at the cassette mounting position depending on the position of the cassette stopper, but it is eliminated. Furthermore, if the accuracy of the position and inclination of the cassette holder 1 at the cassette mounting position is the same as in the conventional case, the effect that the cassettes can be reliably installed by the amount that the bottom plates 5 and 6 become smaller, and conversely, the cassette can be installed with the same certainty as the conventional case If it is sufficient, the accuracy of the position and inclination required for the cassette holder 1 becomes gentle, and there is an effect that the cost of processing and assembling can be reduced.

Further, a cassette holder 1 for holding the tape cassette 36, a lid opening means arranged in the cassette holder 1 for opening the lid 37 of the tape cassette 36, and a lid opening means provided integrally with the lid opening means. The tape cassette 36 is brought into contact with the tape cassette 36.
By providing the cassette stopper 35 for restricting the insertion amount of the cassette holder 1 into the cassette holder 1, the moving mechanism of the cassette stopper 35 with respect to the cassette holder 1 can be shared with the lid opening mechanism of the tape cassette 36, and the configuration is simplified. can do. This is effective not only when the lid is opened at a fixed position with respect to the serge 18 by the pin or the like fixed to the chassis 18, but also when the lid opening mechanism provided in the cassette holder 1 does not restrain the position at the chassis 18. .. In that case, it is only necessary to extend the lid opening lever 9 without newly providing a component of the cassette stopper 35 and a moving mechanism thereof.
The VCR can be made thinner without increasing the number of parts or weight.

[0020]

As is apparent from the above embodiments, according to the present invention, since the cassette stopper can be moved with respect to the cassette holder, a part of the bottom plate of the cassette holder can be eliminated and the cassette can be mounted. It is possible to provide a magnetic recording / reproducing apparatus capable of reducing the thickness of the VCR by increasing the space in which parts can be arranged below the position.

Further, as the moving mechanism of the cassette stopper with respect to the cassette holder, the lid opening mechanism of the tape cassette and the moving mechanism of the cassette stopper can be shared, and the structure can be simplified.

[Brief description of drawings]

FIG. 1 is a perspective view of a cassette holder portion of a magnetic recording / reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a side view showing a state of the cassette holder elevating mechanism at a cassette insertion position.

FIG. 3 is a side view with a partial cross section showing a state of the VCR at a cassette insertion position.

FIG. 4 is a side view with a partial cross section showing a state of the VCR at a cassette device position.

FIG. 5 is a plan view showing a partial cross section of the FIG. VCR.

FIG. 6 is a cross-sectional view showing a state of a conventional VCR at a cassette insertion position.

FIG. 7 is a cross-sectional view showing a state of the VCR in a cassette mounting position.

FIG. 8 is a plan view showing a partial cross section of the VCR.

[Explanation of symbols]

 1 Cassette Holder 9 Lid Release Lever 10 Lid Release Pin 17 Drive Pin 35 Cassette Stopper 36 Tape Cassette

Claims (2)

[Claims] 1. A cassette holder that holds a tape cassette, and a cassette stopper that is arranged on the cassette holder and abuts against the tape cassette to regulate the amount of insertion of the tape cassette into the cassette holder. A magnetic recording / reproducing apparatus provided with a moving means for moving a stopper between a first position in which the stopper contacts the tape cassette and a second position in which the stopper does not contact the tape cassette. 2. A cassette holder for holding a tape cassette, and a lid opening means for opening the lid of the tape cassette, which is arranged in the cassette holder, and is provided integrally with the lid opening means. A magnetic recording / reproducing apparatus provided with a cassette stopper that abuts and regulates the amount of insertion of the tape cassette into the cassette holder.