JPS6331236Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an ejecting mechanism for a cassette tape recorder, a video tape recorder, etc., and in particular to an ejecting mechanism for slowing the movement of a cassette holder during ejection to reduce impact. be.

Conventionally, in a cassette-type tape recorder, etc., the cassette holder that stores the cassette tape is pushed into a fixed position within the main body during recording or playback, and the cassette is held accurately. The cassette holder is rotated to protrude outside the main body, making it easy to attach and remove the cassette. Generally, the rotating operation of the cassette holder is automatically performed by pressing the eject key with your finger among the operation keys arranged on the surface of the main body. However, if the cassette holder is rotated instantaneously, the impact may damage the cassette and shorten the life of the mechanism. Conventionally, therefore, a mechanism has been adopted in which a piston/cylinder for the shock absorber is connected to the cassette holder to rotate the cassette holder slowly and without impact. Because it is expensive and large, it is originally unsuitable for cassette tape recorders that aim to be compact and lightweight, and there has been a desire for an alternative eject mechanism.

In addition, Utility Model Application Publication No. 53-57918 and Utility Model Application Publication No. 54
As shown in Publication No. 12414, etc., a simple mechanism was developed in which one end of a friction piece is fixed to a cassette holder and the other end of the friction piece is brought into sliding contact with the chassis of the machine, thereby gently opening the holder. However, since the friction pieces and the chassis are made of metal, an unpleasant sliding sound between the friction pieces and the chassis is generated every time the holder is opened. Furthermore, since the rotation stroke of the holder (distance between the cassette loading/unloading position and the cassette loading position) is usually not that long, it is difficult to obtain sufficient braking force from the holder by sliding friction in one direction between the friction piece and the chassis at one location. In order to solve this problem, it is necessary to press the friction piece against the chassis with an extremely strong force, but this results in an increase in the sliding noise, and the friction piece and chassis must be supported in sliding contact by spring force. As a result, there was a problem that the load fluctuated so much that the opening and closing operations of the holder could not be performed smoothly.

However, the present invention has a structure in which a cassette holder for mounting a cassette is provided on the machine so that it can be opened and closed via a rotational fulcrum, and the holder is compressed in the opening direction via a spring, and is filled with relatively high viscosity grease. A ram hole is formed in the holder and the machine, and one end of the L-shaped ram is passed through the ram hole, and the other end is passed through the ram hole, so that the holder can be opened and closed in two different directions between the holder and the machine. It provides a braking force for the operation, and the adhesive force of the grease on the ram stretched between the holder and the machine acts as a braking force for the opening/closing operation of the holder.
A constant braking force can be obtained without making any abnormal noise when opening and closing the holder, and the holder can be opened and closed smoothly. By making the directions different, sufficient braking force can be obtained with a small stroke of the holder, and the mechanism can be compactly incorporated between the holder and the machine, and the eject mechanism can easily simplify the structure and reduce costs. That is.

Embodiments of the present invention will be described in detail below with reference to the attached drawings. FIG. 1 is a perspective view of an ejecting device according to an embodiment of the present invention, viewed from the front left side, and FIG. 2 is a perspective view of the same device, viewed from the front right side. In these figures, a cassette holder 4 whose legs 3 are rotatably supported by a rod 2 horizontally mounted below a main body frame 1 equipped with a motor, tape running mechanism, etc. (not shown) is supported by a helical spring 5. The cassette holder 4 is always biased in the direction of the arrow X, that is, in the direction of the position where the cassette can be attached and detached, as shown in the figure, and the side surface 6 has a pin 7 embedded therein. A bracket 8 is rotatably attached to the bracket 8, and the tip of the bracket 8 is rounded into a cylindrical shape to form a swing-side ram hole 9. On the other hand, one sliding contact portion 12 is inserted into a fixed side ram hole 11 horizontally bored in the block 10 attached to the main body frame 1, and an L-shaped ram 13 is slidable horizontally.
The other sliding contact portion 14 is inserted into the swing-side ram hole 9 of the bracket 8, and is inserted into the swing-side ram hole 9 of the bracket 8.
The inner or fixed side ram hole 11 or both ram holes 9 and 11 are coated with a material to increase the frictional resistance with the L-shaped ram 13, such as highly polymerized oil, polyvinyl chloride, polyethylene, etc. , Teflon, polyamide resin, etc. are coated. If necessary, these high friction resistance materials may also be used on the L-shaped ram 13 side, or the high friction resistance material may be applied or coated only on the L-shaped ram 13.

Next, to explain the operation of the above embodiment, when the cassette holder 4 is pushed from the state shown in the second figure and rotated in the direction opposite to the arrow X against the force of the helical spring 5. The protrusion 16 provided on the side surface 15 of the cassette holder 4 connects the slope 1 of the hook member 17 provided on the side of the main body frame 1.
8, the hook member 17 is pushed up against the spring 19 in the direction of arrow Y, and when the protrusion 16 passes the slope 18, the hook member 17 is pushed up against the spring 19.
9 and moves in the direction opposite to the arrow Y, the protrusion 16 and the hook 20 of the hook member 17 engage,
The cassette holder 4 is completely held and housed within the main body. Recording and playback are possible in this state, but if you want to take out the cassette again, press down on the eject key 21, and the hook member 17 is pushed up in the direction of arrow Y by a link mechanism (not shown), allowing the hook 20 and the protrusion 16 to When the engagement is released, the cassette holder 4 is rotated in the direction of the arrow X by the force of the helical spring 5, but at this time, the L-shaped ram 13 is pulled by the bracket 8 and causes friction with the inside of the fixed side ram hole 11. The swing-side ram hole 9 is pulled out in the direction of arrow Z while being raised, and the sliding portion 14 of the L-shaped ram 13 is inserted therethrough, and the swing-side ram hole 9 is lowered while coming into contact with the sliding portion 14 . At this time, a high frictional resistance material is interposed between both sliding contact parts 12, 14 of the L-shaped ram 13 and both ram holes 11, 9, and the above-mentioned swing side ram hole 9 is a sliding contact part. 14, the sliding contact part 14 is pulled downward by frictional resistance, so a moment is applied to the L-shaped ram 13 in the direction of arrow W, increasing the pressing force of the sliding contact part 12 against the fixed side ram hole 11. For these reasons, a relatively large force is required to rotate the cassette holder 4, and the cassette holder 4 rotates slowly.

As is clear from the above embodiments, the present invention provides a cassette holder 4 for mounting a cassette on the machine so as to be openable and closable via a rotational fulcrum, and the cassette holder 4
In this structure, ram holes 9 and 10 filled with relatively high viscosity grease are formed in the holder 4 and the machine, and one end of the L-shaped ram 13 is inserted into the ram hole. 9, and the other end is passed through the ram hole 10, and a braking force is provided between the holder 4 and the machine for opening and closing the holder in two different directions, and the tension between the holder 4 and the machine is Since the adhesive force of the grease on the hanging ram 13 acts as a braking force for the opening/closing operation of the holder 4, no abnormal noise is generated when the holder 4 is opened/closed, and a constant braking force is obtained. The operation can be performed smoothly, and by providing the braking force for the opening/closing operation of the holder 4 on the holder 4 side and the machine side and making the directions different, sufficient braking force can be obtained with a small stroke of the holder 4, In addition, the mechanism can be compactly incorporated between the holder 4 and the machine, which has the remarkable effect of simplifying the structure and easily reducing costs.

[Brief explanation of the drawing]

1 and 2 are perspective views of an eject mechanism, which is an embodiment of the present invention. 1... Body frame, 4... Cassette holder,
7... Pin, 8... Bracket, 9... Swinging side ram hole, 11... Fixed side ram hole, 12... Sliding contact part,
13...L-shaped ram.

Claims (1)

[Scope of utility model registration request] A cassette holder 4 for mounting a cassette is provided on this machine so that it can be opened and closed via a pivot point, and the holder 4 is biased in the opening direction via a spring 19. Holes 9 and 10 are formed in the holder 4 and the machine, and one end of the L-shaped ram 13 is inserted into the ram hole 9.
An eject mechanism characterized in that the other end is passed through the ram hole 10, and a braking force is provided between the holder 4 and the machine for opening and closing the holder in two different directions.