JPS6168760A - Reel stand - Google Patents

Abstract

PURPOSE:To load a cassette easily and to attain miniaturization and low cost by adopting the constitution that a reel turntable is provided with an engaging section freely displaced toward the inner side radially and a support section having flexibility. CONSTITUTION:When a cassette is loaded and a hub claw 8a of a reel hub is brought into contact with an engagement 13a of the reel stand, a support section 13a has flexibility radially, an engagement section 13a is displaced toward the center of the reel turntable shown in broken lines and the cassette is loaded smoothly. When the reel turntable is turned and the engagement section 13a enters a space with a hub claw 8a, the engagement section 13a is restored by the elasticity of the support section 13b immediately. When the engagement section 13a of the reel turntable is accommodated in the air gap of the reel hub claw 8a, smooth loading is attained. Further, miniaturization and cost reduction are attained by reducing the number of components.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a reel stand for a recording and reproducing apparatus for audio, video, information, etc.

Conventional configuration and its problems In recent years, as the air volume of recording and reproducing devices that use cassettes has increased, the number of times cassettes can be attached and detached has also increased.
There is an increasing demand for a compact and inexpensive attachment/detachment mechanism that can be used effectively.

Hereinafter, a conventional reel stand will be described with reference to the drawings. FIG. 1 is an external view of a conventional reel stand, where 1 is a magnetic recording/reproducing device yarn, and 2 is a reel rotating shaft provided therein. 3 is a reel stand equipped with an engaging portion 3a for engagement with the knob pawl, and is rotatably attached to 2, and 4 is a retaining ring. 5 is a tape cassette, and 6 is a front lid that is attached so that it can be opened and closed. 7 is a magnetic tape housed in a cassette, and 8 is a reel hub around which the tape 7 is wound. Further, FIG. 2 (IL) is a sectional view taken at the center of the reel hub, and the configuration is as described above.

The operation of the conventional reel stand configured as described above will be described below. When installing the cassette 6 to the 7 palm 1, it is often possible to install it smoothly, but sometimes the second cassette
As shown in Figure (b), the engaging portion 3 & comes into contact with the hub pawl 81L of the reel hub, causing a problem in that the cassette cannot be installed smoothly or cannot be installed. In this case, the cassette must be removed, the reel hub 8 slightly rotated, and then reinstalled, which is inconvenient.

FIG. 3 is a sectional view of another conventional example. A reel stand 3 rotatably supported by a reel rotation shaft 2 provided on the yarn 1 has a retaining piece 9 which is slidable in the axial direction but has a protrusion 9b to prevent it from idling. It is normally energized so as to come into contact with the locking piece 10. Its operation will be explained below. When the cassette is installed in /year/,
When the reel hub pawl provided in the cassette comes into contact with the engaging portion 9 & provided on the engaging piece 9 of the reel stand, the spring 11 is compressed and the retaining piece 9 is pushed down. When the engaging portion 9& is positioned in the gap between the reel hub pawls due to the rotation of the reel stand 2, the engaging piece 9 returns to the position where it contacts the locking piece 1o, and normal rotation transmission is performed.

In the reel stand configured in this manner, although the cassette can be mounted smoothly, the number of parts increases due to the movable retaining piece 9. Additionally, there are other problems such as a spring force acting on the cassette in a direction that prevents it from being installed, and the fact that the engaging piece 9 is located below the cassette when the cassette is installed, making it difficult to make the mechanism part thinner by the height of the engaging piece 9. It had a point.

OBJECTS OF THE INVENTION It is an object of the present invention to provide a small and inexpensive reel stand that facilitates the installation of cassettes.

Structure of the Invention The reel stand of the present invention includes an engaging part that engages with a hub pawl of a tape cassette, and a supporting part that supports this engaging part, and this supporting part has flexibility. It is configured to support the engaging part so that it can be freely displaced in the radial direction of the reel stand.
As a result, even when the reel hub pawl inside the cassette and the engaging portion come into contact, the flexibility of the support portion causes the engaging portion to be displaced toward the center of the reel stand, allowing smooth mounting of the cassette.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 4 shows a sectional view of a reel stand according to an embodiment of the present invention. In FIG. 4, a reel stand main body 13 includes an engaging portion 13& and a support portion 13b, is fitted with a reel stand cap 14, and is rotatably supported by a reel stand rotation shaft 2. 1 is nya 712 is poly slider, 4
is a retaining ring. 8 is a reel hub housed in the cassette, and 8N is a hub pawl.

Figure 5 shows a plan view of the reel hub and reel stand.

The operation of the reel stand of this embodiment configured as described above will be described below. First, when the cassette is installed, as shown in FIG.
When a comes into contact with the engaging part 132L of the reel stand, the supporting part 13'b has flexibility in the radial direction, so the engaging part 131L is displaced toward the center of the reel stand, and the cassette is smoothly moved. Can be attached to. This is shown in the broken line in Figure 4 and in Figure 6.
It is shown in Figure (2L).

Next, when the reel stand rotates and the engaging part 132L enters the space between the hub pawl 8, the engaging part 13& immediately moves to its supporting part 13b.
It returns to its original state due to the elastic force of , and assumes the shape shown in FIG. 5(b).

Furthermore, when the cassette is mounted, when the engaging portion 132L of the reel stand fits into the gap between the reel hub pawls 8a, the cassette is mounted more smoothly.

As described above, according to this embodiment, the cassette can be smoothly mounted by providing the support portion with flexibility in the radial direction. Furthermore, since the reel stand main body, the engaging part, and the supporting part are integrated, the number of parts can be reduced by two compared to the conventional example shown in FIG. 3, and the cost can be reduced. Furthermore, by eliminating the engaging piece that moves up and down, the overall height of the reel stand can be reduced, making it possible to downsize the mechanism. Also, there is no spring force acting on the cassette from the reel stand. In the above embodiment, the engaging portion and the supporting portion are integrated with the reel stand main body, but they may be integrated with the reel stand cap.

In addition, the structure of the engaging part and the supporting part is such that the supporting part has flexibility,
Any engaging portion may be used as long as it has rigidity in the rotational direction. For example, the engaging portion and the supporting portion 15 may be made of a wire as shown in FIG. 6, and the rigidity in the rotational direction may be maintained by a wall of the window formed in the reel stand cap 14.

Effects of the Invention As is clear from the above explanation, the present invention has a structure in which the reel stand is provided with an engaging part that is freely displaceable inward in the radial direction and a flexible support part, so that the reel and the Even if the claw and the engaging portion of the reel stand are in a positional relationship in which they are still in contact, an excellent effect can be obtained in that the cassette can be smoothly mounted.

At the same time, the number of parts used in the reel stand is smaller and cheaper than conventional ones with the same function.

Furthermore, since the engaging portion moves radially inward of the reel stand, the height of the reel stand can be reduced, allowing the mechanism to be made smaller and thinner.

[Brief explanation of the drawing]

FIG. 1 is an external view of a conventional reel stand, FIG. 2 is a sectional view thereof, FIG. 3 is a sectional view of another conventional example, and FIG. 4 is a sectional view of a reel stand according to an embodiment of the present invention. FIG. 6 is a plan view thereof, and FIG. 6 is a sectional view of another embodiment. 1...--Yan, 2...--Reel rotation axis,
3...Reel stand, 4...Retaining ring, 5...
Tape cassette, 6-...Front lid, a...Tape, 8...Reel hub, 8a...Hub claw, 9
...Engaging piece, 1o...Locking piece, 11...Spring, 12-...Polyslider, 13...Reel stand main body, 13&-...Engaging portion, 13b...Support Department,
14... Reel cap, 16 Engagement support part. Name of agent: Patent attorney Toshio Nakao and 1 other person 1st
Figure 2 Figure 4 Figure 5

Claims (1)

[Claims] It includes an engaging part that engages with the hub pawl of the tape cassette, and a supporting part that supports this engaging part, and this supporting part has flexibility to move the engaging part in the radial direction of the reel stand. A reel stand configured to support the reel in a freely displaceable manner.