JPH06236535A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To obtain stable traveling of a magnetic tape in the magnetic recording and reproducing device for recording and reproducing music and information, etc., by resolving a theme of unstability of recording and reproducing due to misalignment of a head and fixing the head in a prescribed position against the magnetic tape. CONSTITUTION:The head 1 is provided with a 1st positioning means 12, and a bearing block 9 constituted integrally with a bearing part 9a for a capstan shaft 10 is provided with a 2nd positioning means 11, and then the 1st positioning means 12 and the 2nd positioning means 11 are engaged with each other at the time of recording or reproducing a signal. Consequently, since the head can be fixed in a prescribed position at the time of recording and reproducing a signal, traveling disturbance due to external vibration and impact, etc., can be prevented.

Description

Detailed Description of the Invention

[0001]

The present invention is used in a magnetic recording / reproducing apparatus capable of recording / reproducing music, information, etc.
The present invention relates to a magnetic recording / reproducing device for ensuring reliable reproduction.

[0002]

2. Description of the Related Art A conventional magnetic recording / reproducing apparatus will be described below.

FIG. 6 is a top view of a head portion of a conventional magnetic recording / reproducing apparatus, and FIGS. 7 (a) and 7 (b) are front views for explaining a rotating operation of a head mounted on a head supporting portion. . In FIG. 6, reference numeral 1 is a head for recording / reproducing a signal, which is fixed to a spool 3 having a bearing 2 at its center. Reference numeral 4 denotes a support shaft provided on the head support member 5, and the bearing 2 is rotatably engaged with the support shaft 4 while having a clearance 6. Next, head 1 is 18
The operation of rotating 0 degree will be described with reference to FIGS. In FIG. 7A, reference numeral 3a denotes an abutting portion provided on the spool 3, and 5a denotes a protrusion provided on the head supporting member 5, and the protrusion 5a and the abutting portion 3a of the spool 3 are brought into contact with each other so that the head 1 is mounted on the head 1. It is possible to position the recording / reproducing gap 7 provided at the position where the signal can be reproduced with respect to the normal rotation side track 8a formed on the magnetic tape 8 traveling at a predetermined position. Further, by recording at this position, it is possible to record a signal on the forward rotation side track 8a on the magnetic tape 8 as well. Next, since the head 1 is rotatably supported by the support shaft 4 provided in the head support portion 5, the head 1 is rotated in the direction of arrow A by a drive mechanism (not shown) and is shown in FIG. As described above, the other protrusion 5b provided on the head support 5 and the abutting portion 3a come into contact with each other and are positioned at a position rotated by 180 degrees. By doing so, it becomes possible to position the recording / reproducing gap 7 at a position where a signal can be reproduced with respect to the reversal side track 8b formed on the magnetic tape 8 traveling at a predetermined position. Further, by recording at this position, it becomes possible to record a signal on the inversion side track 8b on the magnetic tape 8 as well.

[0004]

However, in the above-mentioned conventional configuration, the bearing 2 provided on the spool 3 to which the head 1 is fixed so that the head 1 can be rotated, and the head that engages with the bearing 2 are provided. Support shaft 4 provided on support 5
Clearance 6 is inevitably required between the two. Due to the existence of the clearance 6, when vibration or impact is applied from the outside, the magnetic tape 8 running at a predetermined position is displaced by the clearance. As a result, there is a drawback that the recording and reproduction of signals become unstable.

The present invention is intended to solve the above problems,
An object of the present invention is to provide a magnetic recording device capable of stable signal recording and reproduction even when external vibration or shock is applied.

[0006]

In order to achieve the above object, the present invention provides a head or head block which is capable of recording and / or reproducing a signal and is rotatably supported, and a head or head block. And a first positioning means, a bearing portion which constitutes a bearing of one or more capstans for driving the tape at a constant speed together with a pinch roller, and a second positioning means provided in the bearing portion, and records a signal. Alternatively, the first positioning means and the second positioning means engage with each other during reproduction.

[0007]

Therefore, according to the above-mentioned structure of the present invention, even if external vibration or shock is applied, the head will not be displaced with respect to the magnetic tape traveling at a predetermined position, so that a stable signal can be obtained. Recording and reproduction can be performed.

[0008]

【Example】

(Embodiment 1) Hereinafter, regarding a magnetic recording / reproducing apparatus according to an embodiment of the present invention, the same parts as those of FIGS. 1 and 5 and FIGS. Will be described.

FIG. 1 is a perspective view of the magnetic recording / reproducing apparatus of the present invention seen from the front upper side, FIG. 2 is an enlarged view of the vicinity of the head support portion of FIG. 1 seen from above, FIGS. 3 (a) and 3 (b), 1 is an enlarged view of the vicinity of the head supporting portion of FIG. 1 as seen from the front, FIG. 4 is an enlarged top view of an essential portion for explaining the moving state of the head portion, and FIG. 5 is a first positioning portion and a second positioning portion. It is an enlarged view for explaining the engagement state of. In the figure, reference numeral 9 denotes two bearing portions 9 (a) for rotatably holding the capstan shaft 10.
And a bearing block provided with the second positioning means 11. 1
Reference numeral 2 is a first positioning means provided on the head 1. Reference numeral 13 denotes a sub-board supported by a sub-board supporting portion 15 provided on the main board 14, and the head support member 5 is fixed to the sub-board 13. The sub-board supporting portion 15 is the sub-board 1
3 is engaged with the guide groove 16 provided in the sub board 1
3 is supported, and at the same time, the sub-board 13 is supported so as to be slidable in the moving direction of the head 1.

As described above, the feature of the present invention resides in that the first positioning means 12 and the second positioning means 11 are provided, and then FIGS. 2, 3 (a) and 3 (b). The rotation operation of the head 1 will be described using. As shown, the first positioning means 12 and the second positioning means 11
Is at a position facing the head moving direction. Then head 1
3 is rotatably supported on a support shaft 4 provided on the head support member 5, and therefore, a drive mechanism (not shown) can be used to drive the head shown in FIG.
It rotates in the direction of arrow A shown in (a), and as shown in FIG. 3 (b), it is positioned at a position rotated by 180 degrees where the protrusion 5b and the contact portion 3a of the spool 3 come into contact with each other. By doing so, it is possible to position the reversal side track 16 (b) formed on the magnetic tape 16 traveling at a predetermined position at a position where a signal can be reproduced. Further, by recording at this position, it becomes possible to record a signal on the reverse side track 8 (b) on the magnetic tape 8 as well. Further, also at this position, the first positioning means 12 and the second positioning means 11 are at positions facing each other in the head moving direction.

Next, the positional relationship between the first positioning means 12 and the second positioning means 11 will be described with reference to FIGS. 4 (a), 4 (b) and 5. As described in FIG. 1, the guide groove 16 and the sub-board supporting portion 15 provided on the sub-board 13 are provided.
The sub-board 13 is slidable in the head moving direction by the engagement of the head support member 5 fixed to the sub-board 13, and the head 1 is also movable in the head moving direction. Therefore, the head 1 can reciprocate between the loading position of the cassette 17 shown in FIG. 4A and the signal recording / reproducing position shown in FIG. 3B by a drive mechanism (not shown). There is. At the cassette loading position shown in FIG. 4A, the first positioning means 12 and the second positioning means 12
The positioning means 11 of are separated. Next, when the head 1 moves in the direction of the cassette 17 and reaches the signal recording / reproducing position shown in FIG. 4B, the first positioning means 12 and the second positioning means 11 are moved as shown in FIG. Engage. Thereby, the head 1 can be fixed at a predetermined position regardless of the clearance b between the support shaft 4 and the bearing 2 shown in FIG.

The first positioning means 12 is the head 1
It can also be provided in the head block constituting the.

[0013]

As is apparent from the above embodiments, according to the present invention, the first positioning means and the second positioning means are provided so that when the head is rotated, the magnetic tape is properly positioned with respect to the magnetic tape. Since the head can be fixed,
It is possible to prevent the head from deviating from a predetermined position due to externally applied vibration or shock at the signal recording / reproducing position, and to perform stable signal recording / reproducing.

[Brief description of drawings]

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

FIG. 2 is a top view of a main part of the magnetic recording / reproducing apparatus.

FIG. 3A is a front view of a main part of the magnetic recording / reproducing apparatus. FIG. 3B is a front view of a main part of the magnetic recording / reproducing apparatus.

FIG. 4A is a top view of a head portion of the magnetic recording / reproducing apparatus. FIG. 4B is a top view of a head portion of the magnetic recording / reproducing apparatus.

FIG. 5 is a top view of essential parts for explaining a method of engaging a positioning means of the magnetic recording / reproducing apparatus.

FIG. 6 is a top view of essential parts of a conventional magnetic recording / reproducing apparatus.

FIG. 7A is a front view of a main part of the magnetic recording / reproducing apparatus. FIG. 7B is a front view of a main part of the magnetic recording / reproducing apparatus.

[Explanation of symbols]

 1 Head 9 Bearing Block 9a Bearing Part 10 Capstan Shaft 11 Second Positioning Means 12 First Positioning Means

Claims (1)

[Claims] 1. A head or a head block rotatably supported for at least one of recording and reproducing a signal, a first positioning means provided on the head or the head block, and a magnetic tape driven at a constant speed. A bearing block for one or more capstan shafts, and a second positioning means provided on the bearing block. The first positioning means and the second positioning means are provided at the time of recording or reproducing a signal. A magnetic recording / reproducing apparatus characterized in that a second positioning means is engaged.