JPH0119258Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape recorder in which a mechanism case having a cassette mounting portion and a tape drive means such as a capstan pinch roller is provided so as to be freely drawn out from the main body of the device.

In general, car stereos are constructed so that by inserting the cassette itself into the main body of the device through the insertion slot, the cassette and cassette holder are attached to the mounting section, and at the same time the pinch roller and magnetic head are advanced from the non-operating position to the operating position. Therefore, the pinch roller does not advance to the operating position and be pressed against the capstan while the cassette is not mounted on the mounting section.

However, in the case of a tape recorder in which the mechanism case is configured to be freely drawn out from the device body as described above, the mechanism case is pushed into the device body and moves regardless of whether or not the cassette is attached to the mounting section. In this case, it is necessary to prevent the pinch roller from coming into pressure contact with the capstan.

The present invention relates to a tape recorder that takes these points into consideration, and will be described below along with embodiments shown in the drawings.

FIG. 1 shows an external configuration of the tape recorder of the present invention, in which a mechanism case 3 is provided in an opening 2 of a device body 1 so as to be movable by pulling out in the direction of arrow A or pushing in in the direction of arrow A'. The device body 1 has a built-in amplifier circuit, and the mechanism case 3 has a cassette mounting part 6 including a pair of reel spindles 4, cassette positioning pins 5, 5, as shown in FIG. 2, and a capstan 7. , a pinch roller 8, and other tape driving means are provided.

In FIG. 2, reference numerals 9, 10, and 11 are operation buttons such as playback, fast forward, and rewind, which are arranged on the front of the mechanism case 3 , and 12 is the capstan 7.
This is a flywheel installed coaxially with the Support shafts 13 and 14 are provided on the main surface of the mechanism case 3.
A detection lever 16 for detecting whether or not the cassette 15 is attached to the cassette attachment section 6 is rotatably provided on one of the spindles 13, and a pinch roller operating lever 17 is rotatably provided on the other spindle 14. It is set up so that it can move freely.

The detection lever 16 has a detection bent piece 16a formed at one end that abuts against the back surface of the cassette 15, and an L-shaped restraint piece 16b formed at the other end, and is constantly rotated counterclockwise by a coil spring 18. It is energized.

The pinch roller operating lever 17 has the pinch roller 8 rotatably supported at one end thereof, and a protruding piece 17a and an operating cam 17b that engage with or separate from the restraining piece 16b of the detection lever 16 at the other end. It is always urged to rotate clockwise by a hairpin spring 20 wound around the support shaft 19. The operating cam 17b of the pinch roller operating lever 17 protrudes from the side surface of the mechanism case 3 and faces the opening 2 of the device body 1, and comes into contact with the control pin 21 provided in the opening 2 of the device body 1. Separate.

What is important here is that the force of the coil spring 18 that rotationally biases the detection lever 16 is applied to the hairpin spring 20 that rotationally biases the pinch roller operating lever 17.
The force is predetermined to be stronger than the force of
When the attached state of the pinch roller actuating lever 17 is detected and rotated against the force of the coil spring 18, the restraining piece 16b at the other end separates from the protruding piece 17a of the pinch roller actuating lever 17, allowing the pinch roller actuating lever 17 to rotate. Furthermore, when the mechanism case 3 is pulled out from the device main body 1, the control pin 21 and the operating cam 17b of the pinch roller actuating lever 17 come into contact, and the pinch roller actuating lever 17 resists the force of the hairpin spring 20. The pinch roller 8 is configured to be rotated so that the pinch roller 8 is separated from the capstan 7.

In the figure, reference numeral 22 denotes a magnetic head, which is provided on a substrate (not shown) that slides forward when a playback button is operated.

The tape recorder of the present invention is constructed as described above, and its operation will be explained below.

FIG. 2 shows a state in which the mechanism case 3 is pulled out from the opening 2 of the device main body 1, and the cassette is not installed in the cassette mounting part 6 of the mechanism case 3 , and at this time, the pinch roller actuating lever 17 is moved from its actuating cam 17b. is in contact with the control pin 21 of the device main body 1, so the actuating lever 17 is set in the illustrated position against the hairpin spring 20, and the pinch roller 8 is separated from the capstan 7. The detecting bent piece 16a of the detecting lever 16 is rotated counterclockwise by the coil spring 18 in response to the absence of a cassette, and the restraining piece 16b engages with the projecting piece 17a of the pinch roller operating lever 17. It matches.

Therefore, when the mechanism case 3 is pushed into the opening 2 of the device main body 1 in this state, the actuating cam 1 of the pinch roller actuating lever 17 is moved as shown in FIG.
7b is separated from the control pin 21. However, at this time, the restraint piece 16b of the detection lever 16 is engaged with the protruding piece 17a of the pinch roller actuation lever 17, so the rotation of the pinch roller actuation lever 17 due to the force of the hairpin spring 20 is limited to the detection lever 16. , and holds the pinch roller 8 apart from the capstan 7.

Therefore, it is possible to avoid the possibility of the pinch roller 8 being erroneously placed in pressure contact with the capstan 7 when no cassette is attached.

Next, a case where the cassette 15 is installed in the cassette mounting portion 6 of the mechanism case 3 as shown in FIGS. 4 and 5 will be described. FIG. 4 shows a state in which the mechanism case 3 is pulled out from the opening 2 of the device main body 1. At this time, the detection lever 16 has its detection bent piece 16a abutting against the back of the cassette 15 and resisting the coil spring 18. It is rotating in the direction.
Then, the restraining piece 16b of the detection lever 16 is separated from the projecting piece 17a of the pinch roller operating lever 17, and the operating cam 17b of the pinch roller operating lever 17 is in contact with the control pin 21, and the pinch roller 8 is separated from the capstan 7. .

In this state, when the mechanism case 3 is pushed into the opening 2 of the device main body 1, the operating cam 17b of the pinch roller operating lever 17 appears as shown in FIG.
is separated from the control pin 21, and on the other hand, as described above, the projecting piece 17a of the pinch roller actuating lever 17 and the restraining piece 16b of the detection lever 16 are separated, so that the pinch roller actuating lever 17 is moved by the biasing force of the hairpin spring 20. The pinch roller 8 is rotated clockwise by the pinch roller 8, and the pinch roller 8 is pressed against the capstan 7.

Therefore, at this time, the detection lever 16 has its detection bent piece 16a pressed against the back surface of the cassette 15 by the force of the coil spring 18 which urges the detection lever 16 to rotate, thereby controlling the positioning action of the cassette 15 with respect to the mounting portion 6. . On the other hand, the pinch roller operating lever 17 is rotated by the force of the hairpin spring 20, and therefore controls the action of elastically pressing the pinch roller 8 against the capstan 7.

If a power switch (not shown) linked to the pinch roller operating lever 17 is provided and the power switch is configured to close only when the pinch roller operating lever 17 rotates clockwise, the cassette can be placed in the mechanism case. It can be constructed so that the tape can run only when it is installed and then pushed into the main body of the device.

As described above, the tape recorder of the present invention is a tape recorder which has a cassette mounting part and a mechanism case equipped with tape driving means such as a capstan and a pinch roller, which can be freely pulled out from the main body of the device. a detection member that detects whether or not the mechanism case is attached and moves to a different position; and a pinch roller that operates to a different position in connection with the pushing or pulling movement of the mechanism case relative to the device body and presses or separates the pinch roller from the capstan. the detection member and the pinch roller operating lever have a mechanically related part that engages or separates from each other, and when the detecting member is in a position where the non-mounted state of the cassette is detected, the mechanically related part The mechanism case is configured to restrain the operation of the pinch roller actuating lever by the engagement of the mechanism case and to hold the pinch roller in a separated state from the capstan. When the pinch roller is kept pushed in, the pinch roller is prevented from coming into pressure contact with the capstan, so the pinch roller can be completely protected. According to the present invention, the pinch roller actuation lever can be controlled by the detection member that detects whether or not a cassette is attached, so it can be easily constructed. The secondary effect of being able to use the detection lever for positioning the cassette when it is inserted can also be expected, making it possible to provide a tape recorder that is useful in practice.

[Brief explanation of the drawing]

The figures show the tape recorder of the present invention, in which Fig. 1 is an external configuration diagram, Figs. 2 and 3 are plan views of different states when no cassette is installed, and Figs. 4 and 5.
The figures are plan views of different states when the cassette is installed. DESCRIPTION OF SYMBOLS 1...Device body, 2...Opening, 3 ...Mechanism case, 7...Capstan, 8...Pinch roller, 15...Cassette, 16...Detection lever as a detection member, 17...Pinch roller operating lever , 18...Coil spring, 20...Hairpin spring.

Claims (1)

[Scope of utility model registration request] It has a cassette mounting part and a capstan,
In a tape recorder in which a mechanism case equipped with a tape drive means such as a pinch roller is provided so as to be freely drawn out from the main body of the device, the detection member detects whether or not a cassette is attached to a cassette attachment portion and is displaced to a different position; a pinch roller operating lever that operates to different positions in relation to pushing or pulling movement of the mechanism case with respect to the device body and presses or separates the pinch roller from the capstan, and the detection member and the pinch roller operating lever are engaged with each other. Or, it has a mechanically related part that is separated, and when the detection member is in the position where it detects that the cassette is not attached, the mechanically related part restrains the operation of the pinch roller actuating lever, and the pinch roller is moved to the capstan. A tape recorder characterized in that it is configured to be held at a distance from the tape recorder.