JPS6323218A - Tape recorder - Google Patents

Abstract

PURPOSE:To stably run a tape at the time of sound recording as well as reproducing and control the position of an erase head with a high precision by providing a spring member which controls the position of an erase head means by an engaging part to a tape guide and a contacting part of an erase head supporting member to a reference face. CONSTITUTION:A spring 18 is suspended at an angle to a substrate 1 so that the spring 18 presses the front end of a bending part 19a to a reference face 1a and energizes a supporting plate 19 in two directions, namely, toward this side and the substrate, and the bending part 19a of the supporting plate 19 is brought into contact with the reference face 1a and a projecting part 15a is engaged with a guide groove 7b to control the position of an erase head 15. That is, the position of the erase head 15 is controlled in the sound recording operation state by the point, where the bending part 19a formed on the supporting plate 19 is brought into contact with the reference face 1a, and the part where the guide groove of a tape guide 7 is engaged with the projecting part 15a, and the relative position of the erase head 15 to the magnetic tape, the guide part of the tape guide 7, and a recording and reproducing head 6 is held with a very high precision.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape recorder equipped with an erasing head composed of a permanent magnet, which enables stable tape running during recording and playback, and highly accurate positional regulation of the throat during erasing. It's a Nishida thing.

When a permanent magnet is used as an erasing head for erasing previously recorded content on a magnetic tape during recording in a tape recorder, this erasing head is kept in contact with the magnetic tape only during recording, and is kept away from the magnetic tape during playback. There is a need. Conventionally, the erasing head is moved in conjunction with the operation of the recording operation member, but if the erasing head is placed in a different position during recording and playback, the erasing head itself is moved. When a tape guide is provided, the tape guide conditions differ between recording and playback, resulting in, for example, level fluctuations during playback, resulting in deterioration of performance.

Conventionally, an erasing head has been movably engaged with a tape guide provided on a head substrate, but in this case, the erasing head is rotatably supported by the head substrate, In the active position (stop mode) the erase head was associated with the tape guide so that it did not engage it. Therefore, in conventional devices, the tape guide comes into contact with the magnetic tape in both recording and playback modes, but the erasing head only engages with the tape guide during recording, and the tape guide comes into contact with the magnetic tape during playback. This will differ from the contact conditions. In other words, in the playback mode, the erasing head is in a position away from the tape guide, and in the recording mode, the erasing head is guided by the tape guide.In both recording modes, the tape guide is always relative to the magnetic tape under the same conditions. is not related.

The present invention eliminates the drawbacks of such conventional devices, and embodiments thereof will be described below with reference to the drawings.

1 is a board having a reference surface 1a; 2 is a head board which is movable back and forth guided by the shafts 3, 4.5 of the board 1; A tape guide 7 on which a guide portion 7a is formed is placed.

Reference numeral 8 denotes a pinch roller, which is rotatably attached to a shaft 10 at -9. The pinch roller lever 9 is rotatably provided on the shaft 11 of the head substrate 2, and is urged counterclockwise by a lever spring 12 so that the pinch roller 8 is pressed against the capstan 13. .

The capstan 13 is the meta/l/14 of the ml board 1.
It is rotatably supported by a motor (not shown) and rotated clockwise.

Reference numeral 15 denotes an erasing head, which is attached to the axis 16° 17 of the substrate 1.
The support plate 1 is slidably provided at the same time as the head substrate 2 while being guided by the support plate 1 and is biased toward the front by a lever spring 18.
A convex portion 15a provided on the side surface of the erasing head 15 is fitted into a guide groove 7b provided in the vertical piece of the tape guide 7 from the rear of the vertical piece.

A downwardly bent bent portion 19a of the support plate 19 is brought into contact with the reference surface 1a of the substrate 1, and the spring 18 presses the tip of the bent portion 19a against the reference surface 1a. Therefore,
The spring 18 is suspended in an inclined state with respect to the substrate 1 as shown in FIG. 4 so as to bias the support plate 19 in two directions, ie, toward the front and toward the substrate 1. The position is controlled by the contact of the bent portion 19a of the support plate 19 with the base Q surface 1a and the engagement of the convex portion 15a with the guide groove 7blC.

Reference numerals 20 and 21 denote reel stands, which are rotatably mounted on the shafts 22 and 23 of the substrate 1.

A cassette 24 has a magnetic tape (not shown).

With the above configuration, the operation will be explained next.

When a playback operation is performed from a stopped state (not shown), the head board 2 is moved forward as shown in FIG.
The guide portion 7a of the tape guide 7 comes into contact with a magnetic tape (not shown), the pinch roller 8 is pressed against the capstan 13, and the magnetic tape is run from right to left, resulting in the reproduction operation state (2).

In this state, the guide groove 7b of the tape guide 7 moves relative to the convex portion 15a, and the tape guide 7 moves toward the erasing.

The card 15 is held at a position separated from a magnetic tape (not shown).

Next, when a recording operation is performed from stop position B (not shown), the recording head 6, tape guide 7, and pinch roller 8 move in the same manner as in the reproduction operation, and at the same time the support plate 1
9 is moved forward as shown in FIG. 2 against the spring 18, the erasing head 15 is also moved forward and comes into contact with a magnetic tape (not shown), thus entering the recording operation state. In the recording operation state, the position of the erasing head 15 is regulated by the contact point between the bent portion 19a formed on one support plate and the reference surface 1a, and the engagement portion between the guide groove 7b of the tape guide 7 and the convex portion 15a. Therefore, the relative position of the erasing head 15 with respect to the magnetic tape, the guide portion 7a of the tape guide 7, and the recording/reproducing head 6 is bounced and held with high precision.

As described above, the tape recorder of the present invention includes a magnetic head for recording/reproducing on a magnetic tape, a tape guide for guiding the running of the mK tape, and a tape recorder equipped with the magnetic head and the tape guide. and the tape guide is slidably supported on the main board so as to be able to move forward and backward with respect to the magnetic tape, and the operating position is such that the magnetic head is in contact with the magnetic tape, and the magnetic head is located far away from the magnetic tape. A head substrate that can take a separate, non-operating position, an erasing head means comprising a permanent magnet that contacts the magnetic tape only during recording to erase the magnetic tape, and the head substrate on which the erasing head means is mounted. The erasing head means is slidably supported on the substrate so as to be movable in the same direction as the magnetic tape, and has an operative position in which the erasing head means contacts the magnetic tape and an inoperative position in which the erasing head means is spaced apart from the magnetic tape. an erasing head support member which can be attached to the erasing head means, and which is engaged with a tape guide mounted on the head substrate when the head substrate is moved to either the non-operating position or the operating position, and the erasing head means an engaging portion that allows the tape guide to guide movement with respect to the head means; and an engaging portion that biases the erasing head support member in the direction of the reference plane of the main board and causes the erasing head means to move relative to the tape guide. Since a spring member is provided for regulating the position at the contact portion between the erase head means and the reference surface of the erase head support member, the position of the erase head means with respect to the magnetic tape etc. is stabilized, and the erase operation is ensured. Further, the tape guide is always held in the engaging portion of the erasing head means and is allowed to move in a guided manner with respect to the erasing head means, regardless of whether the head substrate is in the non-operating position or the operating position. guides the magnetic tape under the same conditions both during playback and recording, and the tape runs stably in both recording and playback modes. In other words, the tape guide is aligned with the erasing head means Ki in both playback and recording, and the conditions under which the tape guide guides the magnetic tape are not affected by the advance or retreat of the erasing head. The tape running is kept stable even in

[Brief explanation of drawings]

FIG. 1 is a top view of the main mechanism in the playback operation state showing one embodiment of the present invention, FIG. 2 is a top view showing the same recording operation state, and FIG.
4 is a side view showing the tape guide and the erasing head, and FIG. 6 is a perspective view of the tape guide and the erasing head before they are engaged. 1...Substrate, 1a...Reference surface, 2...
Song/head board, e...Recording/playback head, 7...
...Tape guide, 7b...Guide groove, 15
... Erasing head, 15a ... Convex portion, 1
8...-Spring, 19... Support plate, 19a
・・・・・・Bending part. Name of agent: Patent attorney Toshio Nakao (1st person)
Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] A magnetic head for recording/playing on magnetic tape,
A tape guide for guiding the running of the magnetic tape, the magnetic head and the tape guide are mounted, and the magnetic head and the tape guide are slidable on the main board so that they can move forward and backward with respect to the magnetic tape. a head substrate which is supported and capable of taking an operative position in which the magnetic head contacts the magnetic tape and an inoperative position in which the magnetic head is far away from the magnetic tape; an erasing head means constituted by a permanent magnet for performing erasing, and an erasing head means on which the erasing head means is placed and slidably supported on the substrate so as to be movable in the same direction as the head substrate; an erasing head supporting member capable of taking an operative position in which the erase head contacts the magnetic tape and an inoperative position in which the erasing head means is spaced apart from the magnetic tape; an engaging portion that is engaged with a tape guide mounted on the head substrate to allow guiding movement of the tape guide with respect to the erasing head means, no matter which position the tape guide is moved to; A spring member biased toward the reference surface of the main board and regulating the position of the erasing head means at a contact portion between an engaging portion for the tape guide and a reference surface of the erasing head support member. tape recorder.