JPH0397154A - Cassette type tape recorder - Google Patents

Abstract

PURPOSE:To stabilize the tape contact to a magnetic head and to facilitate a tape transport adjustment by turning a transport adjustment screw and moving up or down this part accordingly. CONSTITUTION:A guide lever 17 for drawing the tape 4 from its cassette 3 and bringing it into pressurized contact with the magnetic head 2 is fitted with one end of a beam member 19, while the other end is left as a free end, and this free end is movable up and down by operating a movable screw member 18. Then, a guide 14 for drawing the tape 4 projectively upward is fixed on the upper surface side of the beam member 19. Thus, the screw member 18 is moved up and down by turning the screw to make the tape drawing guide 14 inclined in an optimum position, so that the transport adjustment of the tape 4 is carried out. By this method, the fine adjustment of the tape guide 14 in the projecting direction is performed by such simple operation, and contact pressure of the tape 4 is unified over its whole surface to facilitate the tape transport adjustment.

Description

Detailed Description of the Invention (a) Industrial Application Field The present invention relates to a cassette-type tape recorder for DAT cassettes, compact cassettes, etc. This invention relates to improvement of the guide mechanism.

(b) Prior Art Conventionally, a cassette type tape recorder equipped with a tape loading mechanism, such as the one shown in the figure, has been known.

That is, a cassette type tape recorder is known in which a tape loading member is rotatably disposed on a main chassis, and the tape is pulled out from the cassette by the tape loading member and pressed against a magnetic head during recording and reproduction.

In this type of cassette type tape recorder, when adjusting the running of the tape, the magnetic head is moved up and down or tilted.

(c) Problems to be Solved by the Invention However, the above-mentioned cassette type tape recorder has the following problems.

That is, although the tape loading member has a vertical guide shaft, this guide shaft may be inclined due to variations in accuracy during installation. For this reason, if the pressure on the tape surface of the tape in contact with the magnetic head is not uniform, it is not possible to achieve uniform head contact by simply moving the magnetic head up and down or adjusting the tilt, making it difficult to adjust the tape running. was there.

This invention was made in view of the above circumstances,
It is an object of the present invention to provide a cassette-type tape recorder with a tape loading mechanism that can easily adjust the running of the tape.

(2) Means for Solving the Problems and Their Effects This invention comprises a main chassis disposed approximately horizontally, a magnetic head disposed on the main chassis, and a magnetic head rotatable above the main chassis. and a guide lever that pulls out the tape from the loaded cassette and presses it onto the magnetic head.The guide lever is plate-shaped and has one end fixed to a part of the guide lever and the other end free. A beam member serving as an end, a tape pull-out guide integrally protruding upward from the beam member, and a tape pull-out guide that engages with the above-mentioned rope material and is screwed to the guide lever, and the free end of the above-mentioned beam member can be moved up and down by rotating the screw. This cassette type tape recorder includes a screw member that can be moved to finely adjust the protruding direction of the tape pull-out guide.

That is, the cassette tape recorder according to the present invention has the following features:
A beam member, which did not exist in the past, is attached to one end of the guide lever that pulls out the tape from the cassette and presses it onto the magnetic head, and the free end is set as a free end, and the free end can be moved up and down by a movable screw member. It is. Further, a tape pull-out guide that projects upward is fixed to the upper surface of the beam member.

Thus, by rotating the screw member, the screw member is moved up and down to tilt the tape pull-out guide to an optimal position, thereby adjusting the tape travel.

(E) Examples Hereinafter, the present invention will be described in detail based on examples shown in the drawings. Note that this invention is not limited to this.

tW shows the tape path in the loading state of the S-DAT cassette.

In FIG. 1, l is a main chassis disposed approximately horizontally. A magnetic head 2, a take-up reel stand 5, a supply reel stand 6, a capstan T9, and a cab stan S10 are arranged on the main chassis l. Main chassis! Furthermore, fixed tape guide 'rz, fixed tape guide S! 2. A tape pull-out guide T13, a tape pull-out guide Sl4, a primary guide Tl5, a primary guide Sl6, and a guide lever S assembly 17 are provided.

3 is a cassette half, 4 is a tape ξ. 7 is a pinch roller T, and 8 is a pinch roller S.

Broken lines in Figure 1 indicate movable tape loading members (vinch rollers T7 and S8, tape pull-out guide T).
13 and S14, primary guides T15 and S16, and guide lever S assembly 17) in the unloading state. This tape loading member is fitted into a recess (not shown) of the cassette in the unloading state. Then, a tape pass is performed with a predetermined loading. In addition, the guide lever S
The assembly 17 is rotatable around a support shaft 17c.

FIG. 2 shows the tape guide adjustment mechanism. In the figure, 171 is a guide lever S as an arm of the guide lever S assembly 17. A plate spring 19 as a beam member is attached to the lower surface of the guide lever 317a with a fixing screw 17b.

[, (The free end of the leaf spring 19 is biased upward. A tape pull-out guide S14 that projects vertically upward is held on the upper surface of the leaf spring 19. Also, the guide lever S17a A tape running adjusting screw I8 as a screw member is screwed together so as to be able to move up and down, and the tip of the screw I8 is in contact with the upper surface of the leaf spring l9.The screw I8 is screwed into the guide lever Sl7a. In the previous state, the leaf spring 19 is at the position 19a (dashed line in FIG. 2).

When the screw l8 is tightened from this state and the tape pull-out guide Sl4 is made to stand upright on the guide lever S17a, the position of the leaf spring l9 is 19b (the solid line in Fig. 2 is the position).
, the position of the tape pull-out guide S14 is 14b (same as before)
This is the reference state. In this standard state, when the tape 4 is run along the tape path shown in Figure 1,
Normally the tape runs normally.

However, in some cases, due to variations in the accuracy of parts and their assembly, the tape 4
The contact with the magnetic head 2 may be different between the upper and lower parts of the tape surface. Note that in FIG. 3, for convenience of explanation, components other than the magnetic head 2, tape 4, and tape pull-out guide S14 are omitted.

The same applies to FIG.

Figures 3 to 5 show poor head contact at the top of the tape 4 (the tape 4 is floating relative to the magnetic head 2).
Indicates the condition. In this case, the length of the running path on the upper part of the tape 4 is longer than the length of the running route on the lower part of the tape 4.

If the traveling path lengths are made equal, the head contact of the tape 4 will be uniform over the entire tape surface.

Therefore, by tightening the running adjustment screw l8 and moving it in the direction A in FIG. 2, the tape pull-out guide S1
4 is slightly tilted in direction B.

As a result, the amount of tape wrapped around the upper part of the tape pull-out guide Sl4 was increased, and the head contact of the tape 4 on the magnetic head 2 was made uniform (FIGS. 6 to 8). In this state, the tape winding amount of the tape pull-out guide Sl4 is large, so that the effect of tape running adjustment is large.

Another reason for finely adjusting the inclination using the tape pull-out guide St4, which has a large amount of winding, is as follows. That is, when the tape pull-out guide Sl4 is provided with a flange portion, the tape 4 is moved upward or downward by tilting the guide S14. At this time, the tape 4 comes into contact with the flange portion of the guide Sl4 and is likely to curl. However, if the amount of winding of the tape 4 around the guide S14 is large, the portion that restricts the tape 4 is long, making it difficult for the tape 4 to curl.

Note that, unlike the above embodiments, a through hole is provided at the free end of the temporary spring with a diameter larger than the diameter of the threaded part of the screw member that screws into the guide lever, and one end of the screw member is formed larger than the through hole. The screw member may be screwed onto the guide lever through the through hole of the plate spring, and the temporary spring may be moved up and down by the screw rotation operation.

In this cassette type tape recorder, the tape pull-out guide S14 is tilted in a desired direction by tightening the running adjustment screw l8 and moving it upward or downward. This makes it possible to finely adjust the amount of tape wrapped around the tape pull-out guide S14 and to make the tape 4 contact the magnetic head 2 uniformly.

(f) Effects of the Invention In the cassette tape recorder of the present invention, the protruding direction of the tape pull-out guide can be finely adjusted by the simple operation described above. Therefore, the pressure of the tape in contact with the magnetic head can be made uniform over the entire surface.
It becomes easy to adjust the running of the tape.

[Brief explanation of drawings]

1 to 8 show an embodiment of this invention. That is, FIG. 1 is a plan view showing the tape path, FIG. 2 is an enlarged sectional view of the main part showing the inclination adjustment mechanism of the tape pull-out guide, FIG. 3 is an enlarged plan view of the main part showing a bad tape running condition, and FIG. The figure is an enlarged cross-sectional view taken along the line IV-■ in FIG. 3, FIG. 5 is an enlarged cross-sectional view taken along the line ■-■ in FIG. 3, and FIG. 6 is an enlarged plan view of main parts showing good tape running condition. Figure 7 is the 6th
An enlarged sectional view along the line ■1■ in the figure, Figure 8 is the ■-- of Figure 6.
■It is an enlarged sectional view along the line. l...Main chassis, 2...Magnetic head, 3...Cassette half, 4...Tape, l3...Tape pull-out guide T , 14...
...Tape pull-out guide S1l7...Guide lever S assembly, 17a...Guide lever S1 17b...Fixing screw, 17c...Spin shaft, 18 ...Tape travel adjustment screw, l9...
...Plate spring (beam member). B' Fig. 4 Fig. 6 Fig. 8 Fig. 2 Fig. 5 Fig. 4 Training bow 7 Fig.

Claims (1)

[Claims] 1. A main chassis arranged approximately horizontally, a magnetic head arranged on the main chassis, a magnetic head arranged rotatably above the main chassis, and a tape is pulled out from a cassette to be loaded. a guide lever that is crimped onto the magnetic head, and the guide lever further includes a beam member having a plate shape and having one end fixed to a part of the guide lever and the other end being a free end; and a beam member integrally extending upward from the beam member. A protruding tape pull-out guide that engages with the beam member and is screwed to the guide lever, and can move the free end of the beam member up and down by rotating the screw, thereby finely adjusting the protruding direction of the tape pull-out guide. A cassette type tape recorder comprising a screw member.