JPH0110748Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an operating lever device with a magnetic head that can stabilize the position of a recording head.

Generally, when the operating lever is slidably provided on the guide part, a certain amount of space is created between the guide part and the operating lever because a fitting dimension is required.
When a magnetic head is attached to this operating lever, the magnetic head will be activated as the operating lever vibrates.
The angle of the head gap during recording and the angle of the head gap during playback become misaligned, resulting in poor high-frequency characteristics. Furthermore, the magnetic head moves in a direction perpendicular to the running direction of the magnetic tape, and is guided by the magnetic field of the adjacent track, causing signals from other systems to leak, deteriorating the recording and playback characteristics.

This idea was made in order to solve the above problem.The operating button is connected to the operating lever to which the magnetic head is fixed.The operating lever is slidably mounted on the guide part and can be operated in the operating position. The object of the present invention is to provide an operating lever device with a magnetic head that can prevent vibration of the magnetic head and improve recording and playback characteristics by providing an engaging portion corresponding to a guide member to suppress movement of the lever. be.

An embodiment of this invention will be described below with reference to the drawings. In Fig. 1a, reference numeral 1 denotes a plate-shaped operating lever with an operating button 2 connected to one end. A protruding locking portion 1a is formed at the tip in a direction perpendicular to the longitudinal direction of the lever 1. The magnetic head 3 is fixed on the plate of the operating lever 1, and the magnetic head 3 is in a stopped state in which the head surface is a predetermined distance away from the magnetic tape T running along the tape running path as shown in FIG. 1a. The operating lever 1 is slidably provided on the guide portion so as to be guided from the operating position to the operating position where the head surface is brought into close contact with the magnetic tape T as shown in FIG. 2a. In the illustrated example, as shown in FIG. 1b, the operating lever 1 is inserted between a pair of guide pins 4a and 4b whose heads are provided with a flange, and a guide hole 5 for regulating the sliding direction of the operating lever 1 is inserted. is formed at the other end of the operating lever 1, and the guide hole 5 is fitted into the guide pin 4c. Here, the guide hole 5 is formed into a long hole along the longitudinal direction of the operating lever 1.

In addition, as shown in FIG. 2b, on both side edges of the operating lever 1 in correspondence with the guide pins 4a and 4b, in the actuated position, the ribs of the guide pins 4a and 4b are engaged to prevent movement of the operating lever 1. A protruding engaging portion 6
Form a and 6b. At this time, the engaging portions 6a, 6
It is formed into a trapezoidal shape so that the operating lever 1 does not stop midway due to collision with the brim of the guide pins 4a and 4b. Then, a spring member such as a coil spring 7 is connected to the locking portion 1a to pull the operating lever 1 into the stopped state.
Provided for.

On the other hand, a second operating lever 1 is installed near the locking part 1a.
As shown in Figure a, a locking mechanism 8 is provided to hold it in the activated position. This lock mechanism 8 has a holding part, for example, an L-shaped lock lever 9, which is rotatable, and a coil spring 10 which applies a clockwise rotational force.As shown in FIG. A stop pin 11 is provided to prevent the lock lever 9 from rotating when engaged with the locking portion 1a of the lever 1.

Next, the operation of this embodiment will be explained.

Now, in the stopped state shown in FIG.
a, 4b, and 4c and slide upward in the figure. At this time, as shown in FIG. 2a, the end of the guide hole 5 comes into contact with the guide pin 4c, preventing movement of the operating lever 1, and the head surface of the magnetic head 3 comes into close contact with the magnetic tape T. At the same time, the lock lever 9 comes off from the tip of the locking part 1a of the operating lever 1, and
The lock lever 9 rotates clockwise due to the elasticity of the coil spring 10. One end of the lock lever 9 is prevented from rotating by a stop pin 11, and the end of the lock lever 9 engages with the locking portion 1a to hold the operating lever 1 in the operating position. At this time, the engaging portions 6a and 6b of the operating lever 1 engage with the flanges of the guide pins 4a and 4b, as shown in FIG.
The movement of the operating lever 1 (in the vertical direction in the drawing) is suppressed.

Therefore, according to such a configuration, by setting the operating lever 1 to the operating state position,
Since the movement of the operating lever 1 is suppressed by the engaging portions 6a and 6b, the position of the magnetic head 3 can be stabilized. As a result, the deviation in the angle of the head gap during recording and the angle of the head gap during playback can be kept extremely small, and azimuth loss can be improved. Furthermore, since the vertical vibration of the magnetic head can be prevented, the height of the magnetic head 3 is constant, making it less susceptible to induction by magnetic fields from adjacent tracks, and crosstalk can be improved.

By improving azimuth loss and crosstalk in this way, recording and playback characteristics can be improved.

Note that this invention is not limited to the above-mentioned embodiments, and can be implemented with various modifications without changing the gist.

For example, in the above embodiment, a guide pin is used as a guide portion for slidably guiding the operating lever, but the invention is not limited to this, and for example, a guide rail with a groove formed therein may also be used.

As described above, according to this invention, an operating button is connected to an operating lever to which a magnetic head is fixed, and this operating lever is provided so as to be slidable on a guide part, and movement of the operating lever is suppressed in the operating state position. By providing the engaging portion corresponding to the guide member, it is possible to provide an operation lever device with a magnetic head that can prevent vibration of the magnetic head and improve recording and reproducing characteristics.

[Brief explanation of the drawing]

Figures 1a and 2b or 2a and 2b are views showing one embodiment of this invention, and Figure 1a is a plan view showing the same embodiment in a stopped state, and Figure 1b is a view similar to Figure 1a. A vertical sectional view taken along line A-A, FIG. 2a is a plan view showing the operating state of the same embodiment, and FIG.
- It is a longitudinal cross-sectional view taken along the line B. 1... Operating lever, 1a... Locking portion, 2... Operating button, 3... Magnetic head, 4a, 4b, 4c...
Guide pin, 5...Guide hole, 6a, 6b...Engaging portion, 7...Coil spring, 8...Lock mechanism, 9
... Lock lever, 10 ... Coil spring, 11 ...
...stop pin, T...magnetic tape.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An operating lever that is directly connected to the operating button and fixes the magnetic head, and a guide portion that slidably guides the operating lever to the stopped position and the activated position. , an engaging portion provided on the operating lever corresponding to the guide portion and engaging the guide portion to suppress movement of the operating lever when set to the operating state position, and an engaging portion attached to the operating lever to stop the lever. An operating lever device with a magnetic head, comprising an elastic member for returning the operating lever to the operating state position, and a locking mechanism provided near the operating lever for holding the lever in the operating state position. (2) The operating lever device with a magnetic head according to claim 1, wherein the engaging portion is formed by forming a protrusion on the plate surface of the operating lever.