JPH0536627U - Tape guide mounting mechanism - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce the number of parts. [Construction] A guide shaft 2 is erected on a chassis 1. A tape guide having a pair of flanges 5 and 12 arranged at both ends of the sleeve 9 is attached to the guide shaft 2. The flanges 5 and 12 regulate the position of the tape T. A spring piece 13 is formed on the flange 12 on the chassis 1 side using a part of the spring piece 13. The flange 12 urges the sleeve 9 toward the flange 5 by the urging force of the spring piece 13, and consequently holds the positions of the flange 12 and the sleeve 9 stably. The flanges 5 and 12 abut on both ends of the sleeve 9 so that the distance between the flanges 5 and 12 is substantially equal to the tape width. With the flanges 5 and 12,
The position of the tape T is regulated. Spring piece 13 on flange 12
Since the coil spring is formed, a separate coil spring for holding the flange 12 is unnecessary. Therefore, the number of parts can be reduced, and the number of assembling steps associated therewith can be reduced.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a mounting mechanism suitable for application to tape guides such as VTR and R-DAT.

[0002]

[Prior Art]

 For example, a plurality of tape guides are used in VTRs, R-DATs, etc. in order to guide the tape running and to make the tape running stable.

FIG. 4 and FIG. 5 show an example thereof. Reference numeral 1 is a chassis, and a cylindrical guide shaft 2 is fixed to the chassis 1. The guide shaft 2 is formed by integrally forming a support shaft 3 and a receiving portion 4 having a larger diameter than the support shaft 3. The guide shaft 2 is erected with its receiving portion 4 in contact with the chassis 1. A screw portion 3a is formed at the tip of the support shaft 3 (upper end in FIG. 5).

Reference numerals 5 and 8 are flanges. The flanges 5 and 8 regulate the position of the tape T. The flange 5 is attached near the tip of the support shaft 3. The flange 5 is formed with a screw hole 6 corresponding to the screw portion 3a of the support shaft 3. The height of the flange 5 can be adjusted by rotating the flange 5. Further, the flange 5 has a groove 7 formed on the upper surface thereof so as to be orthogonal to the axis. The height of the flange 5 can be adjusted by fitting the tip of a driver into the groove 7.

As shown in FIG. 5, the flange 8 is formed with a hole 8 a having a diameter slightly larger than that of the support shaft 3. The flange 8 is arranged between the sleeve 9 and the coil spring 10 which will be described later in a state of being fitted into the support shaft 3. The sleeve 9 has a cylindrical shape, and the tape T contacts the peripheral surface thereof. The width of the sleeve 9 in the vertical direction is substantially the same as the tape width. As shown in FIG. 5, the sleeve 9 is formed with a hole 9a having the same diameter as the hole 8a of the flange 8. The sleeve 9 is arranged between the flanges 5 and 8 while being fitted into the support shaft 3. A tape guide is constituted by the sleeve 9 and the pair of flanges 5 and 8 arranged at both ends thereof.

The coil spring 10 is fitted between the receiving portion 4 and the flange 8 while being fitted in the support shaft 3. That is, since the coil spring 10 constantly urges the flange 8 upward, the sleeve 9 holds the sleeve 9 in contact with the flange 5. As a result, the distance between the flanges 5 and 8 is substantially the same as the tape width.

[0007]

[Problems to be solved by the device]

 By the way, as described above, in order to hold the flange 8, the separate coil spring 10 is required.

Therefore, the present invention aims at reducing the number of parts.

[0009]

[Means for Solving the Problems]

 In this invention, in a mechanism for attaching a tape guide having flanges arranged at both ends of a sleeve to a guide shaft, a spring piece for urging the tape guide toward the other flange side by using a part of one flange is provided. It is formed.

[0010]

[Action]

 Due to the biasing force of the spring piece 13 formed on the one flange 12, the one flange 12 biases the sleeve 9 toward the other flange 5. The flange 12 stably holds the positions of the flange 12 and the sleeve 9. The positions of the tape T are regulated by the flanges 5 and 12 arranged at both ends of the sleeve 9, respectively. Since the urging means called the spring piece 13 is formed on the one flange 12, a separate coil spring is unnecessary. Therefore, the number of parts for holding one flange 12 can be reduced, and the number of assembling steps associated therewith can be reduced.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. 3, parts corresponding to those in FIG. 5 are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIGS. 1 and 2, the flange 12 is in the form of a circular thin plate when viewed in plan. The flange 12 is formed with a hole 12a having a diameter slightly larger than that of the support shaft 3. The flange 12 has a spring piece 13 formed on a part thereof. The spring pieces 13 are formed on the flange 12 at three positions with predetermined angular intervals (120 degrees in this example). As shown in FIGS. 1 and 2, the spring piece 13 is configured to be bent downward at a predetermined angle from the vicinity of the outer peripheral surface of the flange 12 toward the center of the flange 12. Therefore, when a force is applied to the flange 12 from above, the spring piece 13 acts to urge the flange 12 upward.

Then, as shown in FIG. 3, the flange 12 is arranged between the receiving portion 4 and the sleeve 9 while being fitted into the support shaft 3. The spring piece 13 of the flange 12 contacts the receiving portion 4. Further, the flange 12 urges the sleeve 9 upward by the urging force of the spring piece 13 and stably holds the positions of the flange 12 and the sleeve 9. Therefore, the flanges 5 and 12 are in contact with both ends of the sleeve 9 so that the distance between the flanges 5 and 12 is substantially the same as the tape width. The position of the tape T is regulated by the flanges 5 and 12. The present example is configured as described above, and the other points are similar to the example of FIG.

According to this example, the flange 12 can be held at a constant height by the spring piece 13 formed on the flange 12, so a separate coil spring for holding the flange 12 is not required, and the number of parts is increased. Can be reduced. Therefore, the number of steps for assembling the tape guide attachment mechanism can be reduced.

In this example, the adjustment amount is smaller than in the case where the coil spring is used, but since the precision of each component is improved, only a slight adjustment is required, so there is no problem.

[0016]

[Effect of the device]

 According to this invention, since the flange can be held at a constant height by the spring piece formed on one of the flanges, the number of parts for holding the flange can be reduced, and the number of assembling steps associated therewith can be reduced. .

[Brief description of drawings]

FIG. 1 is a plan view of a flange of an embodiment.

FIG. 2 is a cross-sectional view taken along the line II of FIG.

FIG. 3 is a diagram showing a main part of the embodiment.

FIG. 4 is a perspective view of a conventional example.

5 is a cross-sectional view taken along the line II-II in FIG.

[Explanation of symbols]

 1 chassis 2 guide shaft 3 support shaft 4 receiving portion 5, 12 flange 9 sleeve 13 spring piece T magnetic tape

Claims (1)

[Scope of utility model registration request] 1. A mechanism for attaching a tape guide, in which flanges are arranged at both ends of a sleeve, to a guide shaft, wherein a part of the one flange is used to urge the tape guide to the other flange side. A tape guide attachment mechanism, characterized in that a spring piece is formed.