JPH0329804Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Purpose of the Invention [Field of Industrial Application] This invention relates to a tape recorder, and particularly to a mechanism of a tape cassette attaching/detaching device.

[Prior art]

In conventional tape recorders, in order to move a tape cassette from its playing position to its insertion position, a method is used in which a cassette holder that stores the cassette is rotated about a shaft provided in the tape recorder main body.

[Problems to be solved by the invention] In conventional tape recorders, the tape cassette is installed while moving in an arc, so it is necessary to install the tape cassette smoothly without interfering with the capstan or reel shaft. However, it is necessary to keep the rotational fulcrum of the cassette holder sufficiently apart from the capstan and reel shaft, which has the disadvantage that the tape cassette attaching/detaching device becomes large in size. Furthermore, in a tape recorder having a structure in which a plurality of tape cassettes are stacked and arranged, the reel shaft and capstan are long, so it is very difficult to smoothly attach and detach the tape cassettes using the conventional attaching and detaching device.

This idea was devised in view of these circumstances, and involves moving the cassette holder almost parallel to the capstan to prevent the tape cassette from coming into contact with the reel shaft, capstan, etc., and then rotating it to remove the cassette. To provide an attachment/detachment device in which a tape cassette can be easily attached and detached by having a large outlet opening.

(b) Structure of the invention This invention consists of a lever that is rotatable about the shaft of the first gear fixed to the tape recorder body and has a bent portion at one end, and a cassette door provided at the other end of the lever. , a cassette holder rotatably supported by a support arm protruding inside the door;
rotatably supported at an end of the bent portion;
The tape cassette attaching/detaching device is provided with a second gear that meshes with the gear, and a cam that is coaxial with the second gear, can be driven integrally with the second gear, and comes into contact with the bottom of the cassette holder.

〔Example〕

This invention will be described in detail below based on embodiments shown in the drawings. Note that this invention is not limited to this.

In FIG. 1 showing the tape cassette attaching/detaching device of this invention, 1 is a first gear fixed to the tape recorder main body, 2 is rotatable about the shaft 2c of the first gear 1, and is bent at an almost right angle at one end. 3 is a cassette door provided at the other end of the lever 2 substantially parallel to the bent portion 2a; 4 is a support arm 5 protruding from the inner surface of the door 3, which is rotatable by a fulcrum 5a; 6 is a second gear rotatably supported by a shaft 2b at the end of the bent portion 2a and meshes with the first gear 1; 7 is coaxial with the second gear 6 and is connected to the second gear; 6, and is a cam that comes into contact with a protrusion 4a provided at the bottom of the cassette holder 4. Further, 8 is a pressing member that presses the tape cassettes 10 and 11 inserted into the holder 4 against a positioning member 9 provided on the main body side of the tape recorder, 12 is a capstan;
13 is the reel shaft, 14 is the tip hooking part 5 of the support arm 5
b and the hook part 4 that protrudes rearward of the cassette holder 4.
A spring 15 is installed to be biased in the contraction direction between the pressing member 8 and the retaining portion 8 at the rear of the pressing member 8
A spring 16 is installed to be biased in the contraction direction between the lever 2 and the tape recorder body, and a spring 16 is biased in the contraction direction to be installed between the downwardly protruding hook 2e of the lever 2 and the tape recorder body. 2d is a protrusion provided at the end of the lever 2 and comes into contact with the end 8c of the pressing member 8 when the cassette door 3 is opened; 4b is a pin provided on the holder 4 and comes into contact with the support arm 5; 4d is a protrusion provided at the end of the lever 2; This is a stop pin for the tape cassettes 10 and 11 provided at the bottom of the holder 4.

Next, the operation of this configuration will be explained.

The cassette door 3 is urged by a spring 16 to rotate clockwise about the fulcrum 2c, and when the cassette holder 3 is pushed into the playing position, it is linked to the eject button for ejecting the cassette. It is held in the state shown in FIG. 1 by a claw (not shown), but by pressing the eject button, this claw is released and the cassette door 3 is moved around the fulcrum 2c by the force of the spring 16. Rotate clockwise. The cassette holder 4 is urged by a spring 14 to rotate clockwise about a fulcrum 5a provided on the support arm 5, and when the cassette holder 3 is pushed into the playing position, it rotates vertically. Its rotation is regulated by the contact pin 4b so that it becomes . The tape cassettes 10, 11 are pressed against a positioning member 9 by a cassette pressing member 8 and are positioned in the vertical direction.

The state in which the cassette holder moves from the playing state to the cassette ejecting state by operating the eject button will be explained. In FIG. 1, when the eject button is pressed and the claw (not shown) holding the cassette door in this state is released, the cassette door 3 is rotated clockwise around the fulcrum 2c by the spring 16. . Accordingly, the gear 6 rotates while meshing with the first gear 1, and the cam 7, which is coaxial with the gear 6 and rotates integrally therewith, rotates clockwise. As the cassette door 3 rotates, the cassette holder 4 attempts to perform an arcuate motion about the fulcrum 2c, but the eccentric cam 7 contacts and pushes the protrusion 4a of the cassette holder 4, causing the cassette holder 4 to move. It moves almost parallel to the capstan 12. The curved surface A on the circumference of the cam is shaped to move the cassette holder 4 in parallel while contacting the protrusion 4a of the cassette holder. FIG. 2 shows a state in which the above-mentioned parallel movement has been completed, and the point B on the circumference of the cam 7 is in contact with the protrusion 4a of the cassette holder 4.

When the cassette door 3 further rotates from the state shown in Figure 2, the cam 7 also rotates further, but as the contact point approaches point C on the circumference from point B, the cam 7 is rotated so that the distance from the center of rotation becomes smaller. It has been formed. Therefore, as the cam 7 rotates, the projection 4a of the cassette holder 4 contacts the cam 5 due to the force of the spring 4, and rotates clockwise about the fulcrum 5a. When the contact point between the cam 7 and the protrusion 4a of the cassette holder 4 approaches a point C on the circumference of the cam 7, the cassette holder 4 rotates about the fulcrum 5a, and the cassette ejecting portion becomes wide open (the second point). Figure 3). At this point, the rotation of the cassette door 3 is restricted by a suitable means (not shown) such as a stop pin. Note that the pressing member 8 is attached to the cassette holder 4
In the process of rotation, the protrusion 8c of the lever 2 is pushed by the protrusion 2d of the lever 2 so as not to interfere with the tape cassette, and the protrusion 8c rotates clockwise about the fulcrum 8a.

(c) Effects of the invention According to this invention, the cassette holder makes a parallel movement along the capstan, and then makes a rotational movement to open the cassette ejection port wide and wide, so that the tape cassette does not interfere with other members such as the capstan. The tape cassette can be smoothly attached and detached without any trouble.

In addition, even in tape recorders that use multiple tape cassettes lined up coaxially with the reel shaft and capstan, the reel shaft and capstan do not interfere with the tape cassettes during installation and removal, making it easy to install and remove tape cassettes. Equipment is provided.

[Brief explanation of drawings]

Fig. 1 is a partial side view showing an embodiment of this invention, Fig. 2 is an explanatory drawing showing the parallel movement state of Fig. 1, and Fig. 3 is an explanatory drawing showing the state in which the cassette door of Fig. 1 is opened. It is. 1...First gear, 2...Lever, 3...Cassette door, 4...Cassette holder, 5...Support arm,
6...2nd gear, 7...cam.

Claims (1)

[Scope of utility model registration request] A lever that is rotatable about a shaft of a first gear fixed to a tape recorder main body and has a bent portion at one end, a cassette door provided at the other end of the lever, and a cassette door that projects inside the door. a cassette holder rotatably supported by a support arm; a second gear rotatably supported at an end of the bent portion and meshing with the first gear; and a second gear coaxial with the second gear. A tape cassette attaching/detaching device comprising: a cam which is movable together and comes into contact with the bottom of the cassette holder.