JPH04115334U - tape guide post - Google Patents

Abstract

(57) [Summary] [Purpose] To create a tape guide post that does not deteriorate the output of playback signals even if tension differences occur in the width direction of the magnetic tape due to changes over time in the position of the tape running mechanism or individual differences in cassette tapes. The purpose is to provide. [Structure] A cylindrical elastic body 31 is provided on the tape guide roller 3 or the support shaft 1 of the tape guide post.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a tape guide post for a video tape recorder (VTR), etc.

0002

[Conventional technology]

For VTRs, etc., for example, the The magnetic tape is pulled out from inside the tape cassette by the tape guide post. and several other tape guides along with the tape guide post used for the drawer. The driving route is defined by the post. This tape guide post has a non-rotating guide. There is a do post and a rotating guide post.

0003 FIG. 7 is a diagram showing a conventional example of a rotating guide post. In the figure, 1 is the support shaft, 4 , 5 are an upper regulating part and a lower regulating part which are fixed to or integrally formed with the support shaft, respectively; Reference numeral 3 designates a tape guide roller rotatable around the support shaft 1 via the bearing portion 2 . Tae The guide roller 3 is made of resin such as polycarbonate, which has almost no elasticity.

0004 The magnetic tape contacts the circumferential surface of the tape guide roller 3 and rotates the tape guide roller 3. The lower surface of the upper regulating part 4 and the upper surface of the lower regulating part 5 move the vehicle upward and downward. The position is restricted in the direction.

[0005] In addition, conventional non-rotating guide posts are made of stainless steel or other materials that come in sliding contact with the magnetic tape. It consists of a supporting shaft. Typically, this non-rotating guide post has a magnetic Gaps near slanted guide posts or tape cassettes where the tape enters or exits at an angle. The upper regulating section and There are no lower regulation parts, etc.

[0006]

[Problem that the idea aims to solve]

However, in the conventional tape guide post configuration, tape guide posts etc. Magnetic A tension difference occurs in the width direction of the tape, and the contact between the head and the magnetic tape increases. Since there is a difference between the upper and lower sides, problems such as deterioration of the output of the reproduced signal may occur. Ta.

[0007] The present invention aims to solve this problem.

[0008]

[Means to solve the problem]

The tape guide post of the present invention has a cylindrical elastic body supported by a support shaft. It is a structure.

[0009]

[Effect]

Since the present invention is configured as described above, it is possible to prevent unevenness in the width direction of the magnetic tape. When tension is applied, the elastic body deforms and the upper edge of the magnetic tape in the width direction This causes a slight difference in the path length of the magnetic tape at the bottom edge and eliminates the above non-uniform tension. magnetic tape can run smoothly.

0010

【Example】

Embodiments of the present invention will be described in detail below with reference to the drawings.

[0011] FIG. 1 is a sectional view of an embodiment of a rotating guide post according to the present invention. In the figure, 1 is a support shaft, and 3 is rotatable around the support shaft 1 via bearings 2, 2. The provided tape guide rollers 4 and 5 are provided at the upper and lower sides, respectively, and support the tape guide rollers 4 and 5. These are an upper regulating portion and a lower regulating portion that are fixed to or integrally formed on the shaft 1.

0012 The upper regulation part 4 and the lower regulation part 5 regulate the vertical position of the magnetic tape. It will be done.

[0013] The tape guide roller 3 includes an elastic body 3a such as rubber having a cylindrical shape, and a surface of the elastic body 3a. Protective parts 3b and 3b made of non-magnetic material such as Al, stainless steel, resin, etc. It is composed of a cylindrical holding body 3c for holding an elastic body 3a and a protection part 3b. .

[0014] The elastic body 3a is elastically deformed by the tension generated in the magnetic tape. Ru.

[0015] Further, the protection part 3b has a thickness that is not deformed by the tension, and has a magnetic This is provided to prevent scratches, wrinkles, etc. from occurring on the tape. Also, the table The surface roughness is preferably the same as or lower than that of conventional tape guide posts. That's fine.

[0016] With the above configuration, the tension in the width direction of the magnetic tape can be elastically reduced. Can be absorbed into body 3a. In addition, the protective part 3b prevents scratches or uneven tension on the magnetic tape. It can prevent wrinkles (or stress) etc. caused by It can be run on.

[0017] Further, the rotating guide post of the present invention may have a structure as shown in FIG. here, 6 is a spring interposed between the upper regulating part 4 and the bearing part 2; 4. The vertical position of the tape guide roller 3 is controlled by the lower regulating part 5 and the spring 6. There are restrictions on the location.

[0018] FIG. 3 is a cross-sectional view of an embodiment of the non-rotating guide post of the present invention. In the figure, 1 is a support shaft, and 10 is a notch formed in the support shaft 1. Said notch 10 An elastic body 3a is fitted in the elastic body 3a, and a protective portion 3b is provided on the surface of the elastic body 3a. There is. As the elastic body 3a and the protection part 3b, the same ones as in the first embodiment can be used. . Note that a structure as shown in FIG. 4 may be used.

[0019] With the above configuration, the same effect as the rotating guide post described above can be achieved. can get.

[0020] FIG. 5 is a diagram showing an example of a tape running system of a VTR. 20 is a cylinder around which the magnetic tape 21 is wound diagonally. Magnetic tape 21 is a cylinder Recording, reproduction, etc. are performed by a magnetic head (not shown) built in 20.

[0021] The magnetic tape 21 is attached to a drawer guide that stands vertically on a movable body (not shown) when traveling. The cassette case is from the supply reel 26 in the base 25, cylinder 20, capstan 27, erase The head 28, the control head 29, and the tension detection arm are vertically erected. The guide post 30 for detection of motion, slidingly contacts the guide posts 31, 31, and the cassette case. It is arranged so as to be wound up on the winding side reel 32 inside.

[0022] The rotating guide post shown in Figure 1 is used as the pull-out guide post 22, 22 of the traveling system. , and the others used conventional guide posts. At this time, in the width direction of the magnetic tape Even with uneven tension, stable playback output was obtained.

[0023] Next, the non-rotating guide post shown in FIG. 3 is attached to the inclined guide post 23 of the traveling system. ,23, and the others used conventional guide posts. Stable playback output even at this time was gotten.

[0024] Furthermore, the above-mentioned non-rotating guide post is used as the inclined guide post 23, 23 of the above-mentioned traveling system. Instead, use it for tension detection guide post 30 or guide post 31, 31. However, stable playback output was obtained.

[0025] The above stable playback output can be obtained if the tension is uneven in the width direction of the magnetic tape. When a tension is applied, the elastic body is caused by uneven tension as shown in Figure 6. This deformation increases the path length of the magnetic tape at the upper and lower ends in the width direction of the magnetic tape. This creates minute differences in the tension and absorbs the uneven tension, so the tape runs smoothly. This is to stabilize the magnetic tape and to equalize the sliding force between the head and the magnetic tape. Furthermore A protective part is provided on the part that comes into direct sliding contact with the magnetic tape, so the magnetic tape This is also to ensure smooth running without causing scratches, wrinkles, etc. In addition, the above The explanation is for a rotating guide post, but it also applies to a non-rotating guide post. The same is true.

[0026] In addition, the tape guide post of this invention was used for a drawer guide post and an inclined post. In addition to providing stable playback output as described above, when playing magnetic tape cassettes, It can be stably pulled out from cassettes, stored in cassettes, etc., and can be used on the edges of magnetic tapes. It can prevent scratches etc. from occurring.

[0027] The tape guide post of the present invention is not limited to the above embodiments, but can be applied to tapes with various structures. The elastic body may be provided on the guide post, and a protective portion may be further provided on the surface thereof. or The tape guide post of the present invention is not limited to the position shown in the above embodiment, but can be It can be used in various positions as appropriate. Furthermore, the tape running system is not limited to the above-mentioned example. Can be used for.

[0028]

[Effect of the idea]

The tape guide post of the present invention is equipped with an elastic body, so it can easily handle magnetic tape. If uneven tension occurs in the width direction, it can be absorbed. , the magnetic tape can run well and stable playback output can be obtained.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an embodiment of a tape guide post of the present invention.

FIG. 2 is a sectional view of another embodiment of the tape guide post of the present invention.

FIG. 3 is a sectional view of still another embodiment of the tape guide post of the present invention.

FIG. 4 is a sectional view of still another embodiment of the tape guide post of the present invention.

FIG. 5 is a diagram showing a tape running system.

FIG. 6 is a diagram illustrating a state in which uneven tension is applied to the tape guide post of the present invention.

FIG. 7 is a sectional view of a conventional rotary guide post.

[Explanation of symbols]

1 Support shaft 3a Elastic body

Claims (1)

[Scope of utility model registration request] 1. A tape guide post characterized by having a cylindrical elastic body supported by a support shaft.