JPS61214167A - Disk driving device - Google Patents

Abstract

PURPOSE:To reduce an operating force of an eject button by pressing and moving forcibly a holder being in a set position of the lower part, in the upper direction, by a cam piece operated by the eject button. CONSTITUTION:When an eject button 17 is pushed, a cam piece 15 interlocked with said button lifts up a holder 1 against springs 11, 19, and an inclined cam surface 15a of the cam piece 15 abuts on a sliding piece 4 and pushes it up. When the holder 1 is lifted up forcibly to the middle of the upper and lower strokes of the holder, a pressing force of the spring 11 operates effectively and lifts up automatically the holder 1 to an initial state against a depressing spring 19. In this way, the stroke for lifting up forcibly the holder 1 which is held in a set position of the lower part by a prescribed pressing and energizing force, by operating the button 17 is reduced to half, and also a resistance of a spring force which is received before that time is small, therefore, an eject operating force can be reduced by that portion.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a drive device for a disk cartridge in which a disk is rotatably housed in a case. More specifically, it is an improved loading mechanism for loading, unloading, and ejecting disk cartridges.

[Conventional technology]

FIGS. 6(a) to 6(d) show this conventional seed opening mechanism. To explain the operating principle sequentially, first, in the reset state, as shown in FIG.
The disc cartridge C is located at the front end of a horizontal hole in an inverted-shaped guide hole 34 provided in the holder 31, and a disk cartridge C is inserted into the holder 31 from the front end opening thereof.

. When the disk cartridge C is inserted into the holder 31 until it contacts a stopper (not shown) located deep inside the holder 31 and then pushed further, the entire holder 31 is attached to the holder 31 and the device frame, as shown in FIG. 6(b). 33 and moves backward against the tension coil spring 35 stretched between the two. In other words,
The bottle 32 of the holder 31 advances rearward along the horizontal hole portion of the guide hole 34.

When the bottle 32 reaches the corner of the guide hole 34, the holder 31 is biased downward by the tension of the spring 35, and the pin 32 descends along the vertical hole as shown in FIG. 6(C).
The holder 31 is set at a predetermined position for driving the disk cartridge C. In other words, the tension of the spring 35 holds the disk cartridge in the lowered position.

Next, when ejecting the eject button, as shown in FIG. 6(d), the eject button 36, which has been moved forward and biased by another tension coil spring 38, is pushed backward to release the cam plate 37 integrated with the button 36. When moving backward, the pin 32 reaches the corner of the guide hole 34 on the inclined cam surface of the cam plate 37, and the holder 31 is pulled back forward by the tension of the spring 35, returning to the original reset state.

[Problem that the invention seeks to solve]

In such a conventional mechanism, in order to raise the holder 31 during an eject operation, a force is required to stretch the spring 35 and also stretch the return spring 38 of the cam plate 37. However, the spring 35 requires a certain spring force to press and clamp the holder 31 to the lower set position, and cannot be made too weak. For this reason, there is a drawback in that the pressing force required to press the eject button 36 is large, and the pressing force gradually increases as the button is pressed.

This invention has been proposed primarily with the aim of reducing the operating force of the eject button, paying attention to this fact.

[Means for solving problems]

That is, in order to achieve the above object, the present invention has at least the following requirements.

The first requirement is to have a holder 1 into which the disk cartridge C can be inserted and removed from the front end opening 1a, and to support the holder 1 on the device frame side so as to be able to move up and down. Specifically, sliders 4 are provided on the front and rear sides of the left and right sides of the holder 1, and vertically elongated guide holes 6 into which the sliders 4 engage, respectively, are provided on the device frame side.
is provided, and supports the holder 1 with respect to the device frame so that it can move freely only up and down by the guide of the slider 4 and the vertically elongated guide hole 6. Although this point is basically the same as the conventional example, it is noteworthy that in the present invention, it is not essential to move the holder 1 in the front-back direction, only by moving it up and down.

The second requirement is to have a dedicated spring 19 that presses and urges the holder 1 only downward. This spring 19 shares the function performed by the conventional tension coil spring 35, and the spring constant of the spring 19 of the present invention can be much smaller than that of the conventional spring 35.

The third requirement is that the swing link 2 having the slider 8 on the free end side is pivotally mounted on the holder 1 side so as to be able to swing vertically.

A horizontally long guide hole 7 into which the slider 8 is inserted into the device frame side
is provided at a position corresponding to the middle of the vertical stroke of the holder l. In the illustrated example, the slider 4 is supported on the support shaft 3 of the swing link 2 so as to freely rotate.

A slider 8 is freely rotatably supported at the free end of the link 2. What is important here is that the slider 4 is in a fixed position and the distance between the axes between the slider 4 and the slider 8 is always constant. The horizontally elongated guide hole 7 may not be located exactly at the vertical center of the vertically elongated guide hole 6 (although it may be located at an intermediate position between the upper and lower sides).

The fourth requirement is that the slider 8 has a spring 11 that acts in contact with the slider 8, and that when the swinging link 2 is brought down from a horizontal position due to the pressing force of the spring 11, that is, the holder 1 is placed at an intermediate position between the upper and lower sides. If it is higher up, it will act to push up the holder 1, but if the swing link 2 is in a higher position than the horizontal position,
In other words, when the holder 1 is located below the vertical intermediate position, the holder 1 is pressed down.

The fifth requirement is that the cam piece 15 is operated by an eject button 17, and when the button 17 is operated, generally by pushing the button 17 backward, the cam piece 15 moves the holder 1 at the lower center position. This allows for forced upward movement.

[Effect]

According to the above configuration, to describe a more specific example with reference to FIG. 7, the swinging link 2 is in a backward position. therefore.

The pressing force of the spring 11 acts to lift and hold the holder 1 in the raised position.

When the disk cartridge C is inserted into the holder 1 from the front, the slider 4 descends along the vertical guide hole 6, and
The slider 8 moves backward along the oblong guide hole 7 and then moves forward again. Now, the holder 1 is descending together with the slider 4, and when the swing link 2 goes from a horizontal position to an upwardly tilted position after passing the intermediate point, the pressing force of the spring 11 acts to push down the holder 1. , Now a special spring 19 is added to push down the holder l.

When the disc cartridge C is completely pushed into the holder 1, the holder 1 is held at the lower set position.

When the eject button 17 is pressed, the cam piece 15 interlocked with the eject button lifts the holder 1 against the springs 11 and 19. That is, the inclined cam surface 15a of the cam piece 15 contacts the slider 4 and pushes it up. At this time, the middle of the vertical stroke of holder 1.

Actually, if you forcefully lift holder 1 to about half,
After that, the pressing force of the spring 11 acts effectively to hold the holder 1.
is automatically lifted to the original initial state against the push-down spring 19.

〔Effect of the invention〕

Therefore, according to the present invention, the stroke for forcibly lifting the holder 1 held at the lower set position by a predetermined pressing force by operating the eject button 17 can be reduced to about half of the conventional stroke, and moreover, Since the force resistance is slight, the eject operation force is reduced accordingly.

[Embodiment 1] FIGS. 1 and 2 show a first embodiment of a disk drive device according to the present invention.

C is the target disk cartridge, which is a known cartridge in which a disk (magnetic sheet in the figure) is rotatably housed in a relatively hard case.

Reference numeral 1 denotes a thin box-shaped holder, which has an opening 1a for inserting a disk cartridge C at its front end. A pair of swing links 2 at the front and rear of the holder 1 are pivotally attached to the left and right sides of the holder 1 so as to be able to swing up and down about their front support shafts 3. A slider 4 is rotatably supported on a support shaft 3 of each swing link 2, and each slider 4 is engaged with vertically elongated guide holes 6, 6 formed at the front and rear of left and right side plates 5, 5, which constitute the device frame. The holder 1 is supported by these four groups of sliders and six groups of vertically elongated guide holes in a horizontal position so as to be able to move only vertically.

Furthermore, horizontally long horizontal guide holes 7 are formed in the left and right side plates 5 at the rear of the upper and lower intermediate portions of the vertically elongated guide holes 6. The attached freely rotatable sliders 8 are respectively engaged, so that the swing link 2 is structured to relatively swing up and down about the support shaft 3 in response to the parallel up and down movement of the holder 1. ing.

The left and right side plates 5 are fastened to the base frame 9 with screws 10, but one free end piece 11a of the helical spring 11 attached using the screws 10 extends outward from the guide hole 7. It abuts and engages the protruding slider 8 from the rear, thereby constantly pressing and urging the slider 8 forward.

A movable piece 12 having a U-shape in plan view is provided above the holder 1, and a pair of front and rear tongue pieces 12a protruding from the left and right side edges of this movable piece 12 form a front-rear direction at the top of the left and right side plates 5. It is supported through the slit 13 of. The free end piece 11a of the spring 11 is supported from the front by the protruding end of each tongue piece 12a. A tongue piece 12b, which engages in a notch 14 formed in the rear edge of the holder 1, is connected to the rear edge of the movable piece 12 by bending it downward.

When the tip of the disk cartridge C inserted into the holder 1 pushes the tongue piece 12b, the entire movable piece 12 moves rearward.

On the base frame 9, a cam plate 16 with a pair of front and rear cam pieces 15 erected on the left and right sides is provided so as to be slidable back and forth.
7 are installed in one piece. Each cam piece 15 has an inclined cam surface 15a that acts on the slider 4 on the base end side of the swing link 2 from the front. This cam plate 16 is biased forward by a tension coil spring 1.8.

A pressing spring 19 made of a leaf spring is attached in a cantilevered manner to the upper part of the base frame 9, and the spring 19 constantly presses and urges the holder 1 downward.

Next, its operation will be sequentially explained based on FIGS. 2(a) to 2(d).

(a) In the reset state, the holder l is in the vertical guide hole 6
It is located at a position corresponding to the upper limit of . In this case, the swing link 2
is in a backward-hanging position, and the holder 1 receives a pushing up force due to the forward pushing force of the helical spring 11, and this spring force is greater than the downward pushing force of the pushing spring 19.

) From this reset state, disk cartridge C
is inserted from the front end opening 1a of the holder 1.

First, the tip of the disc cartridge C comes into contact with the tongue piece 12b of the movable piece 12, and when the disc cartridge C is subsequently pushed in and the movable piece 12 is moved backward, the side tongue piece 12a of the movable piece 12 springs against the helical spring 11. The free end piece 11a of the spring 11 is pushed rearward, and the forward pressing force of the swing link 2 by the spring 11 is released. At this time, holder 1
is pressed downward by the pressing spring 19, so the slider 4 of the swing link 2 relatively moves down along the vertically long guide hole 6, and the slider 8 moves backward along the horizontally long guide hole 7. Transition. (in Fig. 2) shows this state.

(C) The holder 1 is now lowered in parallel, and the slider 4 reaches the lower end of the longitudinal guide hole 6. The slider has horizontally long guide hole 7
After moving to the front and back center of the body, it moves to the front side again. When the pushing force of the disk cartridge C is released in this state, the helical spring 11 will again press the slider 8 forward, and the swinging link 2 will be in the rearward upward position as shown in FIG. 2(C). The holder 1 is pressed downward by the forward pressing action.

This acts as a clamping force in the set state.

As described above, as the disk cartridge-C is loaded into the lower setting position, the disk drive means and the magnetic head are set. The details are omitted here.

(d+ To take out the disc cartridge C, push in the eject button 17. This pushing operation moves the cam plate 16 backwards, and the inclined cam surface 15a of the cam piece 15 comes into contact with the slider 4, pushing it upward. As a result, the slider 8 moves backward again along the guide hole 7. When the cam plate 16 is further pushed and the slider 4 is pushed up along the cam surface L5a, the swing link 2 is in a position slightly lower than the horizontal position, and in response to the forward pressing force of the helical spring 11, the swing link 2 is displaced to further strengthen the backward position. It is automatically pushed up by the pressing force and returns to the original reset position.Note that the inclined cam surface 15a does not need to be large enough to move the slider 4 to the upper end of the vertical guide hole 6. The degree of inclination of the cam surface 15a can be set to be gentler than that of the conventional example, and in this respect as well, the pushing operation force at the time of ejection can be reduced.

FIG. 3 shows the above embodiment 1 and the conventional example shown in FIG. This is a comparison of the pushing force characteristics of the eject button 17, where A shows the characteristics of the embodiment of the present invention and B shows the characteristics of the conventional example. As is clear from this figure, the present invention is superior to the conventional example.

[Embodiment 2] FIGS. 4 and 5 show a second embodiment of the present invention, in which each cam piece 15 that acts on the slider 4 is pivotally mounted on the side plate 5 with a pin 20. Support.

U-shaped movable plate 21 equipped with an eject button 17 (
Tongue piece 2 protruding from the cam plate 16 (corresponding to the cam plate 16 of Example 1)
1a contacts and swings each cam piece 15, and the cam piece 15 pushes up the holder 1 in the lower position as in the first embodiment. Same as Example 1. however.

In the second embodiment, since the frictional force between the slider 4 and the cam piece 15 can be reduced, the force required to press the eject button 17 can be further reduced.

9 The entire example illustrated is as above, but 1. For example, the spring 19 for the holder is a tension coil spring, the spring 11 for the swing link is also a tension coil spring, and the eject button spring 18 is a pinch coil spring. It can be transformed freely, such as.

The slider 4 only needs to be provided at a fixed position with respect to the holder 1, and does not need to be on the fulcrum axis of the swing link 2. It is advantageous when the slider 4 and the slider 8 are made into rotating rollers because the frictional resistance can be reduced, but they may also be simply fixed bottles.

[Brief explanation of the drawing]

1 and 2 show a first embodiment of a disk drive device according to the present invention, FIG. 1 is an exploded perspective view, and FIGS. 2(a) to 2(d) sequentially show the operation. FIG. FIG. 3 is a characteristic diagram of eject operating force in the present invention and a conventional example. FIG. 4 is an exploded perspective view showing a second embodiment of the invention. FIG. 5 is a side view of the reset state. Figures 6+8) to 6(d) are side views sequentially showing the operation of the conventional example. l...Holder. 2... Swing link. 4... Slider. 6...Vertical guide hole. 7...Horizontal guide hole. 8...Slider. 9...Base frame. 11... Spring acting on the slider. 15...Cam piece. 17...Eject button. 18... Spring acting on the cam piece. 19... Spring that presses down and biases the holder. C...Disk cartridge.

Claims (1)

[Claims] A disk cartridge C supports an insertable and removable holder 1 in a vertically movable manner on the device frame, and has a spring 19 that acts to press and bias the holder 1 only downward. A swing link 2 having a slider 8 is pivotally mounted to be vertically swingable, and a horizontally elongated guide hole 7 into which the slider 8 engages is provided on the device frame side at a position corresponding to the middle of the vertical stroke of the holder 1. The slider 8 has a spring 11 that acts in contact with the slider 8, and the pressing force of this spring 11 pushes up the holder 1 when the holder 1 is above the vertical intermediate position, but when the holder 1 is below the vertical intermediate position. It has a cam piece 15 which acts to push down the holder 1 and is moved by an eject button 17, and when the button 17 is operated, the cam piece 15 forcibly moves the holder 1 at the lower set position. A disk drive device that can be pushed up and moved.