JPH0316099Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a cassette tape recorder, and particularly to a positioning device for a magnetic head.

(B) Prior Art Cassette-type tape recorders that use cassette tapes, in which magnetic tape is stored in a container called a cassette, have become widespread, but the magnetic head in such tape recorders is stored in the cassette. It is mounted so as to be movable between an operating position in which it contacts the magnetic tape and a non-operating position in which it is spaced apart. In a cassette type tape recorder having such a structure, it is necessary to accurately maintain the positional relationship between the magnetic head and the cassette in its operating position.
A technique for positioning the magnetic head at its operating position is disclosed in Japanese Utility Model Publication No. 57-9934, but this technique involves a member in which the magnetic head is attached to a positioning member attached to a fixed substrate. It is configured to perform positioning by bringing the two into contact with each other. In this technique, it is necessary to make the relationship between the positioning member and the cassette tape accurate, but the position of the magnetic head changes due to variations in parts, which poses a manufacturing problem.

(c) Purpose of the invention The present invention aims to provide a magnetic head positioning device that can perform accurate positioning with a simple configuration.

(d) Structure of the invention The present invention is a cassette-type tape recorder that uses a cassette tape in which the magnetic tape is stored in a container called a cassette, in which a magnetic head is attached and the magnetic head contacts the magnetic tape. a magnetic head mounting member mounted so as to be displaceable between an operating position and a non-operating position; or a contact portion of the magnetic head that contacts the front frame of the cassette when the magnetic head mounting member is in the operating position; The magnetic head mounting member is positioned at the operating position by the contact between the corresponding contact portion and the front frame of the cassette.

(e) Embodiments The drawings are all related to the present invention; Fig. 1 is a plan view of the main parts showing the stopped state, Fig. 2 is a plan view of the main parts showing the recording state, and Fig. 3 is the plan view of the main parts showing the recording state. FIG. 3 is a side view of main parts. In the figure, reference numeral 1 denotes a fixed board constituting a cassette-type tape recorder, on which a storage part (not shown) for storing a cassette 2 is formed, and a positioning pin (not shown) for holding the cassette 2 in the storage part. ) etc. are installed. 3
is a recording control lever which is attached to the stationary board 1 so that it can be displaced in the directions of arrows A and B by cooperation with the pin 4 and the guide hole 5, and when a recording operation is performed, it is displaced in the direction of arrow A. It is made possible to do so. Reference numeral 6 denotes a magnetic head mounting member which is rotatably attached to the fixed substrate 1 by a shaft 7 and is biased to rotate counterclockwise by a spring 8. installed. Reference numeral 10 is attached to the lower surface of the magnetic head mounting member 6, and the contact surface 1 of the recording control lever 3 when in the stopped state.
a control pin that abuts the magnetic head mounting member 6 to place the magnetic head mounting member 6 in a non-operating position, that is, a position where the erase head 9 is spaced apart from the magnetic tape T in the cassette 2;
Reference numeral 12 is formed on the magnetic head mounting member 6, and when the magnetic head mounting member 6 is in the operating position, that is, in the position where the erasing head 9 contacts the magnetic tape T, it comes into contact with the front frame 13 of the cassette 2, and the magnetic head This is a contact portion for positioning the mounting member 6 in its operating position.

The present invention is constructed as described above, and its operation will be explained next. When the tape recorder is in a stopped state, the recording control lever 3 is in the position shown in FIG.
1, the magnetic head mounting member 6 is placed in a non-operating position against the biasing force of the spring 8. In such a state, the erasing head 9 attached to the magnetic head mounting member 6 does not come into contact with the magnetic tape T in the cassette 2 and does not perform an erasing operation. Therefore, in such a state, if playback, fast-forwarding, and rewinding operations are performed, each operation can be performed without any problem.

When the user performs a recording operation when the tape recorder is in the stopped state shown in FIG. 1, the recording control lever 3 is displaced in the direction of arrow A. When the recording control lever 3 is displaced in the direction of arrow A, the contact relationship between the contact surface 11 of the recording control lever 3 and the control pin 10 is severed, so that the magnetic head mounting member 6 is moved by the biasing force of the spring 8. It is rotated counterclockwise around the shaft 7. Figures 2 and 3
The figure shows a recording operation state in which such an operation is performed, and the rotational displacement position of the magnetic head mounting member 6 is the same as that of the cassette 2 of the contact portion 12 formed on the magnetic head mounting member 6. is regulated by contact with the front frame 13. In this state, the erasing head 9 attached to the magnetic head attachment member 6 is inserted through the opening provided in the front surface of the cassette 2 and comes into contact with the magnetic tape T. In this state, the erasing operation for the recording operation is performed. In this state, the position of the magnetic head mounting member 6, that is, the position of the erasing head 9, is the same as that of the front frame 13 of the cassette 2 of the contact portion 12. Since the erase head 9 is set by contact with the magnetic tape T, the positional relationship between the erase head 9 and the magnetic tape T can be maintained accurately, and an accurate erase operation can be performed.

In this embodiment, a case has been described in which a magnetic erasing head is positioned, but it can of course be used for positioning an erasing head that performs an erasing operation by direct current or alternating current bias, as well as a playback head or a recording head. It is possible. Furthermore, although a case has been described in which the magnetic head mounting member is provided with an abutting portion that abuts against the front frame of the cassette to position the magnetic head mounting member in its operating position, it may also be provided on the magnetic head itself.

(f) Effects of the invention The positioning device of the invention positions the magnetic head mounting member to which the magnetic head is attached in the operating position by using the contact portion provided on the magnetic head or the magnetic head mounting member and the front frame of the cassette. Since this is done by making contact with the magnetic head, there is an advantage that the positional relationship between the magnetic tape stored in the cassette and the magnetic head can be maintained accurately. Therefore, the present invention can improve the drawback of the conventional technique of positioning the magnetic head independent of the cassette, namely, the problem that the position of the magnetic head changes due to variations in parts, and its practical use is improved. The value is very high.

[Brief explanation of the drawing]

The drawings all relate to the positioning device of the present invention.
FIG. 1 is a plan view of the main parts showing the stopped state, FIG. 2 is a plan view of the main parts showing the recording state, and FIG. 3 is a side view of the main parts showing the recording state. Explanation of main drawing numbers, 1... Fixed board, 2... Cassette, 3... Recording control lever, 6... Magnetic head mounting member, 9... Erasing head, 10... Control pin, 12... Contact Part, T...Magnetic tape.

Claims (1)

[Scope of utility model registration request] In a cassette-type tape recorder that uses a cassette tape in which the magnetic tape is stored in a container called a cassette, a magnetic head is attached and has an operating position where the magnetic head contacts the magnetic tape and a separate non-operating position. a magnetic head mounting member mounted so as to be displaceable between the magnetic head and the magnetic head mounting member; and an abutment provided on the magnetic head or the magnetic head mounting member that abuts the front frame of the cassette when the magnetic head mounting member is in the operating position. When the magnetic head mounting member is in the operating position, the magnetic head mounting member is positioned in the operating position by contact between the contact portion and the front frame of the cassette. Magnetic head positioning device.