JPS6041003Y2 - Cassette holding device - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a cassette holding device for a cassette mounted in a cassette recorder.

[Technical background of the invention]

A conventional cassette holding device will be explained with reference to FIG.

A guide pin 2 attached to the board 1 and a regulating pin 3 that regulates the height of the cassette hold the cassette 4 approximately parallel to the head chassis 6, and a cassette holder 5 attached to the board 1 holds the cassette 4 against the head chassis. The head 6 is pressed in the direction of the head 7.

Further, a head chassis pressing spring 8 is attached to the substrate 1, supports the head chassis 6, and regulates the height of the head 7.

In FIG. 1, when the cassette is mounted, the cassette presser 5 always presses the cassette 4.

Note that when the playback or recording state is entered, the head chassis 6 moves, the head 7 comes into close contact with the cassette 4, and the head 7 is kept in a normal position by the head chassis presser spring 8.

[Problems with background technology]

In the conventional cassette holding device described above, the cassette 4 is pressed in the direction of the head 7, that is, in the direction of arrow A, by the cassette holding 5 even when the cassette 4 is mounted and in a state other than the playback or recording state.

The guide pin 2 was pressed in the direction of arrow A by the force of this cassette 4 in the direction of arrow A, and there was a problem in the durability of the guide pin 2 and the through hole 9 for the guide pin provided in the cassette 4. .

Further, since the cassette presser 5 is always pressed in the opposite direction to the arrow A when the cassette 4 is attached, there is a drawback that the elastic force of the cassette presser 5 is significantly deteriorated.

[Purpose of invention]

In view of the above-mentioned drawbacks, the present invention prevents unnecessary force from being applied to the guide pin or guide pin hole even when the cassette is attached, except during recording and playback, and also prevents the deterioration of the elastic force of the cassette holder. An object of the present invention is to provide an improved cassette holding device.

[Summary of the idea]

In the cassette holding device of the present invention, first and second bent portions and a pressing portion are formed on a leaf spring for holding the cassette, and the first bent portion is pressed by movement of the head chassis during playback or recording. The second bent part moves in accordance with the elastic deformation of the first bent part, and in conjunction with this, the pressing part presses the cassette toward the head.

[Example of idea]

Fig. 2 shows an embodiment of the cassette holding device according to the present invention, and Figs. 3 and 4 show cross-sectional views of the cassette holding device shown in Fig. 2 as viewed in the direction of arrow B. The idea will be explained in detail.

The leaf spring 11 for holding the cassette attached to the board 13 with screws 12 is highly elastic, and has a first bent part 14 bent at 1200°, and a second bent part 14 bent at 50°. 15, and a pressing part 16 bent at 150°, the second bent part 15 is in contact with the substrate 13 and is in the direction of arrow 17.
It is arranged so as to be slidable in the directions of C and C'.

Further, the head chassis 18 is attached to the substrate 13 with support pins 19, 20, 21, 22 so as to be movable in the C and C' directions of the arrow 17. A rotating shaft 24, an erasing head 25, and other parts not shown are attached.

The board 13 includes a stop operation lever 30, a fast forward operation lever 31, a rewind operation lever 32, a constant speed feed operation lever 33, a recording operation lever 34,
Each of the temporary stop operation rods 35 is installed so as to be able to perform a sliding movement, and is connected to various mechanisms (not shown) for performing well-known operations such as stopping, fast forwarding, rewinding, constant speed forwarding, recording, and pausing. ing.

Further, a stop button 36, a fast forward button 37, a rewind button 38, a constant speed forward button 39, a record button 40, and a pause button 41 are fixed to each operation rod, and the board 1
3 and each button are provided with springs 42 to 47 for biasing each operating rod downward in FIG.

The lock plate 48 is guided by guide plates 49 and 50 installed on the base plate 13, and is always biased toward the left in the drawing by a spring 51 between one end of the lock plate 48 and the guide plate 50. Pins 58 to 63 are implanted in the lock plate 48 at positions corresponding to lock notches 52 to 57 provided on the operating rod.

Here, a spring 64 is attached between the constant speed feed operating rod 33 and the helad chassis 18, and a spring 65 is attached between the board 13 and the helad chassis 18.

Further, a support 66 for the pinch roller 24 is rotatably attached to the substrate 13, and the support pins 19, 20, 21,
22, a regulation pin 67.6B, and a guide pin 69.70 are each fixed.

Next, the operation of the cassette holding device of this embodiment will be explained.

When the cassette 80 is attached and the constant speed feed button 39 is not pressed, the cassette 80 and the recording/playback head 23 are separated from each other as shown in FIG. It's also far away.

Therefore, the cassette 80 is not pressed by the pressing portion 16 of the leaf spring 11, and the guide pin 70 is not pressed by the cassette 80 either.

Therefore, when the constant speed feed button 39 is pressed, force is applied to the head chassis 18 via the constant speed feed operation rod 33 and the spring 64, and the head chassis 18 is moved toward the top of the drawing in FIG. 2 to perform the constant speed feed operation. Lock notch 5 formed in the rod 33
5 and the pin 61 implanted in the lock plate 48.

In this state, as shown in FIG. 4, the first bent portion 14 of the leaf spring 11 is pressed by the head chassis 18, and as a result, the second bent portion 1 is elastically deformed according to the first bent portion 14.
5 moves on the substrate 13 in the direction of arrow 17 C, and along with these movements, the pressing portion 16 of the leaf spring 11 presses the cassette 80 in the direction of arrow C'.

Therefore, the head 23 on the head chassis 18 is attached to the leaf spring 1.
It is brought into close contact with the head of the cassette 80 by the pressing force of the first pressing part 16 .

Further, since the head chassis 18 is pressed upward in the drawing of FIG. 4 by the first bent portion 14 of the leaf spring 11, the head 23 is held at a constant position with respect to the cassette 80.

Here, when the stop button 36 is pressed, the lock notch 52 formed in the stop operation rod 30 presses the pin 58 implanted in the lock plate 48, and the lock notch 55 of the constant speed feed operation rod 33 is pressed.
The engagement of the pin 61 is released, and the constant speed feed operation rod 33 is returned toward the bottom of the drawing in FIG. 2 by the spring 45.

Accordingly, the head chassis 1B is moved toward the bottom of the drawing in FIG. 2 by the springs 64 and 65, and the leaf spring 11
is restored to the state shown in FIG. 3, and the pressure on the cassette 80 is also released.

As can be seen from the above description, the cassette holding device of this embodiment presses the first bent portion 14 of the leaf spring 11 with the head chassis 18 that moves with the operation of the constant speed feed operation rod 33, and presses the first bent portion 14 of the leaf spring 11. The pressing portion 16 of the leaf spring 11 exerts a pressing action on the cassette 80 by using pressure, and with this configuration, the cassette 80 is pressed and released in conjunction with the movement of the head chassis 18. The operation can be appropriately and easily switched.

Therefore, compared to conventional cassette holding devices that always press the cassette when the cassette is installed, unnecessary force is not applied to the guide pin or the guide pin hole in the cassette, increasing their durability.Furthermore, the leaf spring itself It also contributes to preventing deterioration of the elastic force of.

Furthermore, in the embodiment described above, the first bent portion 14 of the leaf spring 11 also functions as a spacing spring.

[Effect of idea]

As explained above, the cassette holding device of the present invention does not apply unnecessary force to the guide pin or the guide pin hole of the cassette even when the cassette is attached, unless the head is in close contact with the cassette during recording and playback. This does not occur, and furthermore, it is possible to improve the deterioration of the elastic force of the cassette holding plate spring.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a conventional cassette holding device, Fig. 2 is a plan view showing an embodiment of the cassette holding device according to the present invention, and Figs. 3 and 4 are one embodiment of the cassette holding device according to the present invention. It is a sectional view showing an example. 11...Plate spring, 13...Substrate, 14
. . . first bending portion, 15 . . . second bending portion, 16 . . . pressing portion, 18 . . . head chassis.

Claims (1)

[Scope of utility model registration request] A base plate, a head chassis having a head mounted so as to be movable in parallel along the base plate, and a cassette mounted substantially parallel to the head chassis with the head facing the head; a leaf spring attached to the board to be located on the head side; a first bent part formed on the leaf spring and disposed so as to be able to freely contact the Herad chassis;
a second bent portion formed on the leaf spring and arranged to be movable on the substrate in response to elastic deformation of the first bent portion; and a second bent portion formed on the leaf spring. a pressing part disposed to be able to press the cassette in the head direction in conjunction with the movement of the first bent part, and the first bent part is moved by a pressing force against the first bent part of the helad chassis. A cassette holding device, wherein the pressing portion presses the cassette toward the head as the second bending portion is elastically deformed and the second bending portion moves.