JPH04353661A - Magnetic recording and reproducing apparatus - Google Patents

Abstract

PURPOSE:To reduce the number of components to contrive to diminish a cost by simplifying a working part through allowing the positioning mechanism of a small-sized type cassette to drive only by the use of a mode conversion rod. CONSTITUTION:When a small-sized type cassette 11 is inserted, a rod 35 moves to regulate the rod output part 13a of a small-sized type cassette-positioning pin 12a. In this case, a height-determining part 15a moves to right above an abutment part 33a against the energization of a compression torsion coil spring 25a. When the cassette 11 is mounted in a tape-driving means, the cassette moves downward against the energization of the spring 25a and abuts on the abutment part 33a so that the height is determined and the cassette 11 is positioned and a tape can be driven. Then, when a standard type cassette 1 is inserted, he rod 35 moves to the position, where the output part 13a of the pin 12a is not regulated. In this case, the height-determining part 15a rotates and a guide part 14a moves to right above a notch 32a. Thereafter, when the guide part 14a is inserted into the driving means, the part is positioned at the cassette 11 and can be driven.

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 capable of mounting either a standard tape cassette or a small tape cassette smaller than a standard tape cassette.

0002

BACKGROUND OF THE INVENTION In recent years, tape cassettes used in magnetic recording and reproducing devices such as VTRs include not only standard tape cassettes, but also small tape cassettes that are smaller than standard tape cassettes and that are equivalent to standard tape cassettes. Widely used in integrated VTRs. By the way, in the past, in order to record/play back this small tape cassette on a VTR for standard tape cassettes, it was necessary to use a special adapter to obtain the same tape loop as a standard tape cassette, so it was not necessary to use a small tape cassette. There was a problem in that the adapter had to be attached and detached from the adapter, resulting in poor operability.

However, recently, various companies have proposed VTRs to which small tape cassettes and standard tape cassettes can be attached without using the adapter. In such a device, either a small tape cassette or a standard tape cassette can be selectively installed without using a dedicated adapter, leading to improved operability.

[0004] As a conventional technique, for example, Japanese Patent Application Laid-Open No. 2-22
There is a magnetic recording/reproducing device as shown in No. 0260. Hereinafter, since the present invention particularly relates to the positioning of a small tape cassette, a conventional example will be explained with reference to FIGS. 12 and 13.

FIG. 12 is a side view of a conventional magnetic recording/reproducing apparatus when a small tape cassette is installed, and FIG. 13 is a side view of the conventional magnetic recording/reproducing apparatus when a standard tape cassette is installed. 12 and 13, positioning pins 12a and 12b for positioning the small tape cassette 11 are fixed at predetermined positions on the base 51. As shown in FIGS. The base 51 is slidable relative to the support shaft 55 and is always urged upward by a biasing spring 54, so that it cannot rotate about the support shaft (not shown). Spacer pins 52a and 52b are installed on the rod 35, and although not shown, they are provided on the base 51 from a position directly below the positioning pin 12b in conjunction with a mechanism that detects insertion of the small tape cassette 1. Notch part 5
It is possible to move up to 3.

When the small tape cassette is attached, the rod 35 is brought into a state as shown in FIG. 12 by means of a detection means for detecting insertion of the small tape cassette 11 and a drive source (both not shown) interlocked with this detection means. Spacer pin 52a
, 52b move along the rod 35 to a position where they interfere in a plane. In this condition, small tape cassette 1
1 is attached, the small tape cassette 11 moves the positioning pins 12a and 12b, which are each biased by a spring 54, downward to the spacer pin 5, as shown in FIG.
2a and 52b, and the small tape cassette 11 moves to a predetermined position. In this way, the position of the small tape cassette 11 is determined accurately, and the driving means 4
The magnetic tape 1a can be drawn out by meshing with a gear (not shown) provided on the outer periphery of the reel hub of the small tape cassette 11.

When a standard tape cassette is attached, the rod 35 is brought into a state as shown in FIG. 13 by means of a detection means for detecting insertion of the standard tape cassette 1 and a drive source (both not shown) that is linked to this detection means. Spacer pin 52
a and 52b move along the rod 35 to a position where they do not interfere with each other in plan view. When the standard tape cassette 1 is installed in this state, the standard tape cassette 1 pushes down the positioning pins 12a and 12b, which are each biased by the spring 54, as shown in FIG. . The positioning pin 12b and the base 51 are connected to the spacer pin 52b by the notch 53, and the positioning pin 12a is connected to the spacer pin 5 by escaping from the base 51 in a plane.
2a and to a position where it does not interfere with the installation of the standard tape cassette 1.

[0008]

[Problem to be Solved by the Invention] However, in the above configuration, the rod for the positioning mechanism of the small tape cassette must be stopped at each position after the small tape cassette and the standard tape cassette are installed. However, it must be separate from the mode transition rod that constantly moves depending on each mode, and the drive source for the mode transition rod and the small tape cassette positioning rod are required separately, making the mechanism complicated. , there was a problem that the number of parts increased.

The present invention solves the above problems, and eliminates the need for a rod for a small tape cassette positioning mechanism and a drive source for driving this rod, which have been conventionally used, and only a rod for mode transition is required. To provide a magnetic recording and reproducing device in which a positioning mechanism for a small tape cassette can be driven, the mechanical part is simple, the number of parts can be reduced, and the cost is low.

0010

[Means for Solving the Problems] In order to achieve the above object, the magnetic recording and reproducing apparatus of the present invention drives a magnetic tape in a standard tape cassette or a magnetic tape in a small tape cassette smaller than the standard tape cassette. a first position for positioning the small tape cassette at a predetermined position of the tape drive means, a second position located on the locus of the small tape cassette mounting operation, and a second position that does not interfere with the mounting of the standard tape cassette. 3 position and a fourth position on the locus of the standard tape cassette mounting operation, and can be moved from the second position to the first position by the small tape cassette mounting operation; A positioning means that moves from a fourth position to a third position by a mounting operation, and a positioning means that is regulated to a position where it can be moved from a second position to a first position when a small tape cassette is mounted, and a standard tape cassette is mounted. It has a configuration including a regulating means that releases the regulation when the positioning means is pressed, and an urging means that urges the positioning means to the fourth position.

[0011]

[Operation] With the above-described configuration, the magnetic recording and reproducing apparatus of the present invention is arranged so that when a small tape cassette is inserted into the apparatus, the small tape cassette positioning means is moved to a position where it can be moved from the second position to the first position by the regulating means. The small tape cassette is regulated and moved to the first position by the small tape cassette mounting operation, and the small tape cassette is positioned at a predetermined position of the drive means, so that the tape in the small tape cassette can be drawn out. Furthermore, when the standard type tape cassette is inserted into the device, the small tape cassette positioning means is released from the restriction and is urged to the fourth position by the urging means, and takes the third position by the loading operation of the standard type tape cassette. For,
Does not interfere with installation of standard tape cassettes.

0012

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 11. FIGS. 1 and 2 show a means for positioning a small tape cassette when a small tape cassette is attached;
A side sectional view and a plan view of the tape driving means, regulating means, and biasing means. FIGS. 3 and 4 are a plan view and a side sectional view of the small tape cassette positioning means when the small tape cassette is attached. FIG. 5 is a side sectional view when the small tape cassette is attached. 6 is a plan view of the small tape cassette positioning means after installation of the small tape cassette is completed; FIGS. 7 and 8 are the positioning means and tape drive means when a standard tape cassette is installed. , a side sectional view and a plan view of the regulating means and the urging means, FIGS. 9 and 10 are a plan view and a side sectional view of the small tape cassette positioning means when the standard tape cassette is installed, and FIG. 11 shows the standard tape cassette being installed. FIG. 3 is a side sectional view of the small tape cassette positioning means in FIG. Note that in these figures, the same components as those explained in FIGS. 12 and 13 are given the same reference numerals, and the explanation thereof will be omitted. Also,
The small tape cassette positioning pins 12a, 12b, the height determining pin 17, the bases 21a, 21b, 21c, and the compression torsion coil springs 25a, 25b, 25c have the same configuration, so of these, the small tape cassette positioning pin 12a, the base 21a, and the compression torsion coil spring 25a will be explained as representatives.

First, the positioning means and biasing means of the small tape cassette will be explained. A small tape cassette positioning pin 12a, which is a positioning means for the small tape cassette 11, includes a rod output portion 13a, a guide portion 14a, a height determining portion 15a, and a projection portion 16a. The base 21a includes a retainer 22a, a regulating portion 23a, and a guide hole 2.
4a, and is fixed to the chassis 31. The chassis 31 has a small tape cassette positioning pin 12
A contact portion 33a is provided so that the height determining portion 15a of the small tape cassette comes into contact with the height determining portion 15a of the small tape cassette positioning pin 12a.
A notch 32a is provided to prevent the tape cassette from coming into contact with the standard tape cassette during the mounting operation. The small tape cassette positioning pin 12a is vertically movable and rotatable relative to the guide hole 24a of the base 21a. Further, a compression torsion coil spring 25a, which is a biasing means, biases the guide portion 14a of the small tape cassette positioning pin 12a upwardly along the guide hole 24a of the base 21a and clockwise around the guide hole 24a. However, the guide portion 14a of the positioning pin 12a and the base 2
When the stopper 22a of the small tape cassette positioning pin 12a contacts the stopper 22a to prevent it from coming off, and the restriction by the restriction means is released, the height determining part 15a of the small tape cassette positioning pin 12a is pressed against the cut of the chassis 31 by the clockwise bias. The base 21a is held in a position directly above the notch 32a.
A retainer 22a is arranged. The protrusion 16a of the small tape cassette positioning pin 12a is located at a position where it interferes with the regulating part 23a of the base 21a in terms of height, as shown in FIG. 4, when the small tape cassette is attached. height determining portion 15a of the small tape cassette positioning pin 12a.
The contact portion 33a of the chassis 31 comes into contact with the contact portion 33a of the chassis 31 by downward movement. Furthermore, when a standard type tape cassette is attached, the base 21a does not interfere with the projection 16a of the small tape cassette positioning pin 12a.

Next, the biasing means will be explained. A compression torsion coil spring 25a serving as a biasing means moves the guide portion 14a of the small tape cassette positioning pin 12a to the base 21.
It is biased upward along the guide hole 24a of a and clockwise around the guide hole 24a. The guide portion 14a of the small tape cassette positioning pin 12a and the stopper 22a of the base 21a come into contact with each other to prevent the small tape cassette from coming off.
The rotation position is restricted.Next, the restriction means will be explained. The rod 35 is a mode transition rod, and is arranged at the bottom of the chassis 31, and its position changes for each mode.
For example, the positions of brakes, tension regulators, etc. have been changed. The rod 35 moves the height determining portion 15a of the small tape cassette positioning pin 12a to a position directly above the contact portion 33a of the chassis 31, as shown in FIGS. 2 and 3, in the mode when the small tape cassette is mounted. The rod output portion 13a of the small tape cassette positioning pin 12a is restricted in this manner, and in the mode when a standard tape cassette is attached, the rod output portion 13a of the small tape cassette positioning pin 12a is restricted as shown in FIGS. 8 and 9. The structure is such that the portion 13a is not restricted.

Next, the tape drive means will be explained. When a standard tape cassette or a small tape cassette is installed, the tape drive means 41a and 41b drive the reel hub (not shown) of the standard tape cassette or small tape cassette.
and the tape can be driven.

Standard type tape cassette positioning pin 2a,
2b and height determining pins 3a, 3b are planted from the chassis 31, and when a standard tape cassette is installed, the positioning pins 2a, 2b are inserted into positioning holes (not shown) provided on the back of the standard tape cassette. In order to fit together, the height determining pins 3a and 3b are arranged so as to come into contact with a height determining surface (not shown) provided on the back surface of the tape.

The operation of the magnetic recording/reproducing apparatus having the above-mentioned components will be explained. First, the mounting operation of the small tape cassette 11 will be explained. The small tape cassette 11 is
As shown in FIG. 1, when the small tape cassette 11 is inserted through the opening 37 of the mechanism section 36, a detection means that detects the insertion of the small tape cassette 11 and a driving source (both not shown) that are linked to the detection means detect the insertion of the small tape cassette 11. As shown in FIGS. 2 and 3, the rod 35 moves and restricts the rod output portion 13a of the small tape cassette positioning pin 12a. At this time, the height determining portion 15a of the small tape cassette positioning pin 12a is
A compression torsion coil spring 25a is placed directly above the contact portion 33a of No. 1.
move against the bias of As shown in FIGS. 1 and 5, until the small tape cassette 11 comes into contact with the small tape cassette positioning pin 12a, the small tape cassette positioning pin 12a is held in the height direction by the guide portion 14a and the retainer 22a of the base 21a, and rotates. The direction of movement is maintained by a rod 35. This is the second position.

When the small tape cassette 11 is attached to the tape driving means 41a, 41b, the downward movement of the small tape cassette 11 causes the small tape cassette 11 to move downward against the bias of the compression torsion coil spring 25a, as shown in FIG. Since the height determining part 15a of the small tape cassette positioning pin 12a is located directly above the contact part 33a of the chassis 31, it comes into contact with the contact part 33a of the chassis 31 and the height is determined.
The small tape cassette 11 is positioned. This is the first position. At this time, the tape drive means 41a fits into the reel hub of the small tape cassette 11, and becomes capable of driving the tape.

Furthermore, due to the mode transition of the rod 35, the rod output portion 1 of the small tape cassette positioning pin 12a
3a is released, the projection 16a of the small tape cassette positioning pin 12a has moved to a position where it interferes in height with the restriction part 23a of the base 21a, as shown in FIG. Under the bias of the spring 25a, it rotates clockwise and comes into contact with the regulating part 23a of the base 21a, and keeps the height determining part 15a of the small tape cassette positioning pin 12a in contact with the contact part 33a of the chassis 31. .

Next, the mounting operation of the standard tape cassette 1 will be explained. When the standard tape cassette 1 is inserted through the opening 37 of the mechanism section 36 as shown in FIG. (both not shown), the rod 35 moves to a position where it does not restrict the rod output portion 13a of the small tape cassette positioning pin 12a, as shown in FIGS. At this time, the height determining portion 14a of the small tape cassette 12a is rotated clockwise by the bias of the compression torsion coil spring 25a. Then, the guide portion 14a of the small tape cassette positioning pin 12a
comes into contact with the retainer 22a of the base 21a, and the chassis 3
1 and move directly above the notch 32a provided in 1. As shown in FIGS. 7 and 11, the standard tape cassette 1 is held by the guide portion 14a of the small tape cassette positioning pin 12a and the stopper 22a of the base 21a until it comes into contact with the small tape cassette positioning pin 12a. . This is the fourth position.

When the standard tape cassette 1 is attached to the tape drive means 41a, 41b, as shown in FIG. is located directly above the notch 32 of the chassis 31 and does not obstruct the downward movement, so it moves downward against the bias of the compression torsion coil spring 25a, and the standard tape cassette positioning pins 2a, 2b and It is positioned by height determining pins 3a and 3b. This is the third position. At this time, the tape drive means 41a, 41b are fitted with the reel hub of the standard tape cassette 1, and the tape can be driven. Also, at this time, the small tape cassette positioning pin 1
The protrusion 16a of 2a does not interfere with the base 21a in terms of height.

Furthermore, since the regulation of the rod output portion 13a of the small tape cassette positioning pin 12a has already been released, the third position is always maintained regardless of the mode transition of the rod 35.

In this embodiment, the protrusion 16a of the small tape cassette positioning pin 12a and the base 21
Even after the rod 35 releases the regulation of the rod output part 13a of the small tape cassette positioning pin 12a by the regulating part 23a of the small tape cassette positioning pin 12a, the small tape cassette positioning pin 12a
Although the configuration is such that the height determining portion 15a of the small tape cassette positioning pin 12a and the contact portion 33a of the chassis 31 are maintained in contact, the structure is not limited to this, and the height determining portion of the small tape cassette positioning pin 12a is maintained in contact with the chassis 31. The structure may be such that the contact is maintained by frictional force with the part.

By employing the above-mentioned structure, even if the mode is changed and the rod moves after the small tape cassette is attached, the positioning of the small tape cassette is maintained as described above. Further, even if the rod moves due to a similar mode transition after the standard tape cassette is attached, it maintains a position that does not interfere with the positioning of the standard tape cassette and does not impede movement of the rod. Therefore, the positioning mechanism of the small tape cassette can be driven only by the mode transition rod, and the rod for the small tape cassette positioning mechanism and the drive source for this rod are unnecessary, the mechanism is simplified, and the number of parts can be reduced. , As a result, costs can be reduced.

[0025]

As is clear from the above embodiments, the present invention provides a tape drive means for driving a magnetic tape in a standard tape cassette or a magnetic tape in a small tape cassette smaller than the standard tape cassette. , a first position where the small tape cassette is positioned at a predetermined position of the tape drive means, a second position located on the locus of the small tape cassette mounting operation, a third position which does not interfere with the mounting of the standard type tape cassette, and a standard type tape cassette. and a fourth position on the trajectory of the tape cassette mounting operation, and is moved from the second position to the first position by the small tape cassette mounting operation;
and positioning means that moves from the fourth position to the third position when a standard tape cassette is installed;
The device is configured with a regulating means that regulates the position where it can be moved to a position and releases the regulation when a standard tape cassette is installed, and a biasing means that biases the positioning means to the fourth position, so that mode transition is possible. The small tape cassette positioning mechanism can be driven only by the rod for the small tape cassette positioning mechanism, and the rod for the small tape cassette positioning mechanism and the drive source to drive this rod are no longer required.The mechanism is simplified and the number of parts can be reduced. , it is possible to provide a low-cost magnetic recording and reproducing device.

[Brief explanation of the drawing]

FIG. 1: Small tape cassette positioning means from insertion to mounting of the small tape cassette in an embodiment of the present invention;
Side sectional view of tape driving means, regulating means, and biasing means

[
Fig. 2: A plan view of the small tape cassette positioning means, tape drive means, regulating means, and biasing means when the same small tape cassette is attached.

[Fig. 3] Detailed side plan view of the small tape cassette positioning means when the same small tape cassette is attached.

[Fig. 4] Detailed side sectional view of the positioning means for the small tape cassette when the same small tape cassette is attached.

[Fig. 5] Detailed side sectional view of the small tape cassette positioning means during installation of the same small tape cassette.

[Fig. 6] Detailed side plan view of the small tape cassette positioning means after the small tape cassette has been installed.

[Fig. 7] Side sectional view of the small tape cassette positioning means, tape driving means, regulating means, and biasing means from insertion to attachment of the standard tape cassette.

[Fig. 8] A plan view of the small tape cassette positioning means, tape driving means, regulating means, and biasing means when the same standard tape cassette is installed.

[Fig. 9] Detailed side plan view of the small tape cassette positioning means when the standard tape cassette is installed.

[Fig. 10] Detailed side sectional view of the positioning means for the small tape cassette when the same standard tape cassette is installed.

[Fig. 11] Detailed side sectional view of the small tape cassette positioning means during installation of the standard tape cassette.

[Fig. 12] Side sectional view of the positioning mechanism when installing a small tape cassette in the conventional example

[Figure 13] Side sectional view of the positioning mechanism when the standard tape cassette is installed

[Explanation of symbols]

1 Standard type tape cassette 2a, 2b Standard type tape cassette positioning pin 3a, 3b Standard type tape cassette height determining pin 11 Small tape cassette 12a, 12b Small tape cassette positioning pin 13a Rod output pin 14a Guide part 15a Height determining part 16a Projection part 17 Small tape cassette height determining pin 21a Base 22a Retaining part 23a Regulating part 24a Guide hole 25a Compression torsion coil spring 31 Chassis 32a Notch part 33a Contact part 35 Rod 36 Mechanism part 37 Opening part

Claims (1)

[Claims] 1. A tape drive means for driving a magnetic tape in a standard tape cassette or a magnetic tape in a small tape cassette smaller than the standard tape cassette;
a first position where the small tape cassette is positioned at a predetermined position of the tape drive means; a second position located on the locus of the small tape cassette mounting operation; and a third position which does not interfere with mounting of the standard tape cassette. and a fourth position on the locus of the standard tape cassette mounting operation, and is moved from the second position to the first position by the small tape cassette mounting operation, and the standard tape cassette a positioning means that moves from the fourth position to the third position by a mounting operation; and a positioning means that restricts the positioning means to a position where it can be moved from the second position to the first position when the small tape cassette is mounted. . A magnetic recording and reproducing apparatus, comprising: a regulating means for releasing the regulation when the standard tape cassette is mounted; and a biasing means for biasing the positioning means to the fourth position.