JPS6235158Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a tape guide mechanism in a magnetic recording/reproducing device using tape.

A tape guide conventionally used in an audio tape recorder is fixed to a head or a pinch roller arm. However, especially in VHS standard VTRs, the space between the pinch roller and the cassette half is narrow, making it virtually difficult to install the tape guide due to its thin wall thickness.

Therefore, an object of the present invention is to provide a tape guide mechanism that can be installed in a limited space.

Therefore, in this invention, the tape guide is movable,
The space problem is solved by compressing the cassette half to the wall surface using spring force.

Examples of the present invention will be described below. 1st
The figure shows the tape running system of a VHS standard VTR, and shows the recording (playback, cue, review) status. In Figure 1, 1 is a capstan, 2 is a pinch roller, and 3 is a capstan.
is pinch roller arm, 4 is cassette half, 5 is
is the take-up reel, 6 is the feed reel, 7 is the tape, 8
is the voice control head, 9 is the fixed guide, 1 is the
0 is a cylinder. In order to prevent the tape 7 from rising or falling on the audio control head 8 and the fixed guide 9, the present invention uses a tape guide 11.
2 is a plan view showing the structure of the present invention, and FIG. 3 is a side view.
In Figures 2 and 3, the pinch roller arm 3
A tape guide 11 is rotatably installed on a pin 3c fixed to the pinch roller arm 3, and the tape guide 11 can freely rotate between a stopper 3a and a stopper 3b fixed to the pinch roller arm 3 around the pin 3c. can. The rotation of the tape guide 11 is regulated by a spring applied between the pinch roller arm 3 and the tape guide 11, and the tape guide is brought into contact with the stopper 3a by the spring force. The tape guide 11 has a running surface on which the tape is wound and runs, and upper and lower flanges that regulate the tape running height.

Next, the operation will be explained. Figure 4 shows tape 7
4 shows the state before the recording (playback, queue, review) state, and in FIG. 4, the tape guide 11 is brought into contact with the stopper 3a by the force of the spring 12. FIG. 5 shows the state in which the tape is running during recording (playback, review, queue). In FIG. 5, while the pinch roller 2 is being pressed against the capstan 1, the tape guide 11 is pressed against the wall surface of the cassette half 4 by a force opposing the spring 12, leaves the stopper 3a, and slides on the wall surface of the cassette half 4. ,
It is brought into contact with the tape 7 to regulate the vertical direction. The tape guide 1 may be damaged due to tension fluctuations or disturbances in the tape 7.
A stopper 3b is installed to prevent the roller 1 from coming into contact with the pinch roller 2.

Therefore, according to the present invention, since the wall thickness of the tape guide can be increased, the tape guide can be arranged, and the phenomenon of tape rising and falling due to uneven tape tension can be suppressed. , deterioration of performance such as audio level, and damage to the tape can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a VHS standard VTR in the recording (playback, review, queue) state, Fig. 2 is a plan view of the tape guide mechanism according to the present invention, Fig. 3 is a side view of Fig. 2, and Fig. 4 is FIG. 5 is a plan view before operation, and FIG. 5 is a plan view after operation. 1...capstan, 2...pinch roller, 3
...Pinch roller arm, 3a, 3b...Stopper, 3c...Shaft, 4...Cassette half, 11...
...Tape guide, 12...Spring.

Claims (1)

[Scope of utility model registration request] A tape guide, which has a running surface on which the tape is wound and runs, and upper and lower flanges that regulate the tape running height, is installed near the pinch roller so that it can rotate around a single axis, and a biasing force is applied in one direction by a spring. When the pinch roller is crimped, it enters the cassette in conjunction with the movement of the pinch roller, and one side comes into contact with the side wall of the cassette, causing it to spring. A tape guide mechanism is characterized in that the tape guide mechanism is disposed so that the pinch roller is displaced toward the pinch roller against the eccentric force of the capstan, but does not come into contact with the pinch roller when the pinch roller presses the capstan.