JPS60101753A - Loading structure of cassette to magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To hold a magnetic head and a magnetic tape in a constant contacting state regardless of the precision of a cassette case by implanting guide pins in a main body base, and forming cut parts in a cassette case at positions corresponding to the guide pins. CONSTITUTION:The cassette case 10 is loaded in the main body base 1 as shown by an arrow B, and then base 3 is moved as shown by an arror to enter the magnetic head 5 and an erasing head 9 into the cassette 10 until they contact the magnetic tape 13. When the magnetic tape 13 is run, the wind angle of the magnetic tape 13 to the magnetic head 5 is determined by the relative position relation between the forward movement position of the magnetic head 5 and the guide pins 37 and 38, and irrelevant to the influence depeding upon the structure of the cassette case 10. Namely, the guide pins 37 and 38 are provided to the main body base 1 vertically and the forward movement position of the magnetic head 5 is held stable, so that the wind angle of the magnetic tape 3 to the magnetic head 5 is not influenced by the precision of the cassette case 10.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a structure for mounting a cassette to a magnetic recording and reproducing device, and in particular, when recording and reproducing a magnetic tape housed in a cassette, the present invention relates to a structure for mounting a cassette to a magnetic recording and reproducing device. On the other hand, the present invention relates to a structure for mounting a cassette to a magnetic recording/reproducing apparatus, which can improve as much as possible the accuracy of the vats that define the positional relationship of the magnetic tape in contact with the cassette.

[Prior Art] Conventionally, as a structure for mounting a cassette (particularly for audio) on a magnetic recording/reproducing device, one constructed as shown in FIG. 1 is known.

In the figure, 1 is the main body base of the magnetic recording and reproducing device.
Reference numeral 2 denotes a stud C which is erected on the main body base 1. A slidable base 3 that is engaged with and guided by a stud 2 is provided on the main body base 1. A head mounting member 4 is fixed on the base 3, and a magnetic head 5 is mounted on the head mounting member 4 with screws 6 and 7. One screw 7 is screwed into the head mounting member 4 via a compression spring (not shown), and the azimuth angle of the magnetic head 5 can be adjusted by tightening or loosening this screw 7. has been done. Reference numeral 8 denotes a tape guide plate formed in a U-shape, and is provided on the upstream side of the magnetic head 5 in the tape running direction. Reference numeral 9 denotes an erasing head, which is attached to the base 3. 1o is a cassette case, which is shown attached to the main body base 1. 11 is a supply reel, 12 is a take-up reel, 1
3 is a magnetic tape. This magnetic tape 13 is guided by guides 14, 15, .
- Travels guided by rollers 21 and 22 and 23. 24 is the capstan shaft, cassette case 10
It enters the inside of the cassette case 10 through the hole 10a provided in the cassette case 10 and rotates while contacting the pinch roller 25. A pad 26 is provided inside the cassette case 10, and is provided so that the magnetic tape 13 can be smoothly aligned with the magnetic head 5.

In the playback (or recording) mode, as shown in Figure 11, the base 3 slides in the direction of the arrow in the figure, and the magnetic head 5
Then, the erase head 9 enters the inside of the cassette case 10 and comes into contact with the magnetic case 13. In addition, pinch roller 25
is in pressure contact with the capstan shaft 24, sandwiching the magnetic tape 13 between them, and moving the magnetic tape 13 from the supply reel 11 to the take-up reel]2
drive to. The winding angle of the magnetic tape 13 around the magnetic head 5 is determined by guides 17 provided on both sides of the magnetic head 5.
18 and the advanced position of the magnetic head 5, and the variation in the width direction of the magnetic tape 13 that is in contact with the magnetic head 5 is caused by a tape guide plate provided on the side of the magnetic head 5. 8 is suppressed.

By the way, in the conventional magnetic recording/reproducing device configured as described above, the guides 17 and 18 are connected to the cassette case 1.
0, and its installation position differs slightly depending on the cassette case of various manufacturers. It is not possible to keep the wrapping angle constant.

Further, the guides 17 and 18 are integrally molded with the cassette case 10 from a material such as plastic.
Due to the drawing slope of the mold, sink marks during cooling, etc., it may not be possible to form the mold vertically with sufficient accuracy inside the cassette case 10. In such a case, when the front and back sides of the cassette case are used alternately, there will be differences in the winding angle and tape tension between the front and back sides.

Such differences in winding angle and tape tension were negligible in the case of conventional 4-track analog recording tape recorders, but in the case of conventional 4-track analog recording tape recorders, these differences were negligible in the case of conventional 4-track analog recording tape recorders. In the case of a digital tape recorder that records and plays back, this is a difference that cannot be ignored.
There was a fear that a decrease in output or a decrease in frequency characteristics would occur.

[Summary of the Invention] The present invention was created in order to effectively solve the above-mentioned problems, and replaces the guide provided in the cassette case with a main body base of a magnetic recording and reproducing device. The magnetic recording and reproducing of the cassette can maintain a constant state of contact with the magnetic tape without being affected by the size of the cassette case by installing a guide bin at the top. The purpose is to provide a mounting structure for the device.

[Embodiments of the Invention] Below are preferred and practical examples of the present invention! Example i (explained according to the attached drawings).

Referring to FIGS. 2 to 4, reference numeral 1 denotes a main body base of the magnetic recording/reproducing device, and a stud 2 is erected on the main body base, and the stud 2 is slidably guided while being engaged with the stud 2. A base 3 is provided.

10 is a cassette case, which is the main body base in each figure]
It shows the state in which it is installed. Reference numerals 11 and 12 are a supply reel and a take-up reel, respectively, which are installed in the cassette case 10. 13 is a magnetic tape, and guides 14, 15, 16.
It runs guided by rollers 19, 20, 21 and 22, 23.

24 is a capstan shaft, 25 is a pinch roller, 27 is a support fixed to the main body base 1, and this support 27
There are 1' dowels 37, 38 erected above so that the height can be adjusted.

A stand 28 is erected on the base 3, and the head mounting member 4 is supported by the stud 28 so as to be slidable in the axial direction thereof. An adjustment nut 29 for adjusting the height position of the head mounting member 4 is provided at the upper threaded portion of the stand 2B, and a compression spring 30 is further provided at the lower end of the head mounting member 4 to press it upward. It is stepped. On the base 3, l\tsu1 mi, mounting part u4
In order to prevent the head from rotating around the stand 28, a stud 31 is provided upright to be inserted into an engagement hole provided in the head mounting member 4. 5 is a magnetic head, 6.7
are screws, and 7a is a compression spring, which are constructed so that the azimuth angle of the magnetic head 5 can be adjusted by tightening or loosening one of the screws 7.

Reference numeral 9 denotes an erasing head, which is attached to the base 3.

Figure M3 shows the structure of the guide bin 37 in detail, and 37a is a guide portion on which the magnetic tape 13 comes into sliding contact;
37G is an upper flange portion 37 which engages with the upper end side of the magnetic tape 13 to restrict widthwise fluctuation;
37d is an adjusting groove formed on the upper end surface of the upper flange portion 37b; 37e is a lower flange portion that engages with the lower end side of the magnetic tape 13; A threaded portion 37o is provided coaxially with the guide portion 37a and is screwed into the support stand 27.
A guide bin 6ti is inserted and supported by a. 37h
is a set screw which fixes the guide bin 37 having a height of 14 nodes and prevents the height from changing. The guide bin 38 also has the same structure as the guide bin 37.

The cassette case 10 is provided with an insertion hole 32.33 as a notch at a position corresponding to the guide bin 37.38, and its position and size are set so that the guide bin 37.38 does not interfere with the cassette case 10. has been done.

The insertion holes 32 and 33 are provided not only on the lower surface of the cassette case 10 but also on the upper surface thereof, and are provided so that there is no problem when the cassette case 10 is mounted on either side.

The operation of this embodiment will be explained below.

Shown in Figure 2! The cassette case 10 is mounted on the main body base 1 in the eight directions indicated by the arrows in the figure as shown in FIG. At this time, guide bin 3
Since the tapered portion 37C is provided at the upper part of 7.38, it can be inserted smoothly. Next, the base 3 moves in the direction of the arrow in the figure, and the magnetic head 5 and erasing head 9 enter the inside of the gusset case 10 and come into contact with the magnetic chip 113. Drive of capstan Ihh24 and take-up reel 12
The magnetic tape 13 travels inside the cassette case 10 due to the drive of the magnetic tape 13.
The numbering angle is determined by the relative position between the advanced position of the magnetic head 5 and the guide bins 37, 38, and is not affected by the INTU of the cassette case 10. In other words, if the guide bins 37, 38 are By standing vertically on the base 1 and keeping the advancing position of the magnetic head 5 stable, the numbering angle of the magnetic tape 3 with respect to the magnetic head 5 is not affected by the accuracy of the cassette case 10.

FIG. 3 shows in detail the 1N structure of the guide bin 37, which includes a guide portion 37a, an upper flange portion 37b, a tapered portion 37G, a groove 37d, a lower flange portion 37e, and a threaded portion 3.
7f, the guide pin portion 37a is integrally constructed, and the groove 3
By engaging a driver or the like with 7d and adjusting the rotation, the guide bin 37 can be increased in height by mm in the vertical direction.

Various methods can be considered for adjusting the height of the guide pin 37, but here are some examples: First, the guide pin 37.
38 is adjusted and fixed at a reference height position from the base 1 of the main body using a jig or the like. Next, the azimuth angle C1uF of the magnetic head 5 is determined by adjusting the screw 7 while running a reference tape on which a signal at an accurate azimuth angle has been recorded. Next, a US tape with a certain signal recorded at the correct track position is run, and the magnetic l\rad is increased by rotating the 11-node nut 29 so that the playback output is maximized. Make adjustments.

With the above adjustment, the azimuth angle and height relationship between the magnetic tape 13 passing between the two guide pins 37 and 38 and the magnetic rad have been accurately adjusted.

In addition, in the above embodiment, C is the guard f pin 37°38
flange portions 3'7b and 37e at its upper and lower ends.
However, in a tape recorder that uses a structure that biases the magnetic tape in one direction in the width direction,
For example, a flange portion may be provided only at the bottom, or a guide pin without a flange portion may be used if a tape guide plate for height regulation is used on the side of the magnetic l\\rad.

In addition, there is also an insertion hole 32 into which a guide bin 3"1.38 is inserted.
, 331 cassettes [fx! ! Provided on both sides! However, in a cassette case where the attachment direction to the main body base 1 is unidirectional, it is needless to say that this need only be provided on one side.

[Effect of the invention] As is clear from the above explanation, the present invention provides
The following excellent effects are exhibited.

Guide bins were installed upright on the base of the main unit, and cutouts were made in the cassette case at locations corresponding to these guide bins, so that the magnetic head and magnetic tape could be connected without being affected by the position of the cassette case. The contact state can be kept constant and stable performance can be obtained.

[Brief explanation of drawings]

FIG. 1 is a plan view showing a conventional structure for attaching eight cassettes to a t1 recording and reproducing device U, and FIG. 2 is a perspective view showing an embodiment of the attachment of a cassette to a magnetic recording and reproducing device according to the present invention. , Fig. 3 is a sectional view taken along the mm-m arrow in Fig. 2, and Fig. 4 is a cross-sectional view taken along the line mm in Fig. 2.
It is a side view in the direction of the ■ arrow in the figure. In the figure, 1 is the main body base, 3 is the base, 5 is the magnetic head,
10 is a case I-case, 32.33 is a notch illustrated as an insertion hole, and 37.38 is a guide pin. Agent Oiwa JVJ Male

Claims (1)

[Scope of Claims] In a structure in which the cassette for storing a magnetic tape is installed in a magnetic recording and reproducing device in order to record and reproduce magnetic signals, the cassette of the magnetic recording and reproducing device is installed. The main body base serves as a pedestal. The above-mentioned cassette which is provided on the main body base and is viewed at
a base supported slidably in the direction of the magnetic surface exposed to the cassette; and a magnetic base mounted on the base that engages and disengages from the magnetic surface exposed to the cassette as the base slides. A kite pin is provided on the upstream and downstream sides of the MFA head in the tape running direction, and is provided with a kite pin erected from the main body base, and a notch is formed to allow the kite pin to be inserted into a location corresponding to the guide pin of the cassette. , wherein the cassette is mounted on the main body base, and the guide pin is configured to define the positional relationship of the tape in contact with the magnetic head with respect to the magnetic head. Installation of WaTi.