JPH04276352A - Recording medium loading and unloading device - Google Patents

Abstract

PURPOSE:To facilitate the assembly of a slider and a holder by providing a notched part opened outwardly to an engagement groove and a guide groove provided to a main chassis and a cam groove provided to the slider respectively. CONSTITUTION:An engagement pin 42 fixed to the slider 14 is inserted into the notched part 41 of the main chassis 27. Then, the slider 14 is moved against the energizing force of a spring 19 until the notched part 15d of the cam groove 15 is conformed with the notched part 28c of the guide groove 28, and under this state, pins 7-3 fixed to the holder 4 are inserted into the notched part 28c of the cam groove 15, so as to be engaged with the cam groove 15 and the guide groove 28. Thus, the main chassis 27, the slider 14 and the holder 4 can easily be assembled.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording medium attachment/detachment device which is generally applicable to recording/reproducing apparatuses in which a recording medium is inserted into the apparatus to perform recording or reproduction.

0002

[Prior Art] As an example of a conventional recording medium loading/unloading device,
Some are configured as follows. In other words, there is a cartridge holder (hereinafter referred to as holder) that holds a disk cartridge (hereinafter referred to as cartridge), a main chassis that holds the cartridge so that it can be raised and lowered, and a main chassis that is slidably attached to this main chassis and that moves the holder as it slides. A slider that is raised and lowered, a spring that biases the slider in one direction relative to the main chassis, and a lock lever that is rotatably held on the main chassis and that holds the slider biased by the spring in a predetermined position. and a trigger lever that engages with the lock lever and releases the engagement between the lock lever and the slider.

[0003] In the recording medium loading/unloading device having the above configuration,
As shown in FIG. 5, a horizontal engagement groove 150 is provided in the side surface of the main chassis 127. Furthermore, slider 1
A screw hole 152 is provided on the side surface of 04, and the engagement groove 1
A screw-shaped engagement pin 151 that engages with 50 is screwed. The engagement pin 151 is threaded through the engagement groove 150 after the main chassis 127 is placed on the slider 104 during assembly work. With this engagement, the slider 1
04 is restricted from rising from the main chassis 127.

0004

However, in the above conventional example, the engagement between the engagement groove provided in the main chassis and the engagement pin to be provided in the slider is achieved by passing the engagement groove through the engagement pin. This is done by screwing it onto the slider. Therefore, assembly becomes complicated, which also causes an increase in cost.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to provide a recording medium loading/unloading device that has a simple configuration and is easy to assemble.

[0006]

[Means for Solving the Problems] In order to solve the problems faced by the prior art and achieve the above object, the present invention provides a recording medium attachment/detachment system that allows a disc-shaped recording medium housed in a cartridge to be detachably attached. The apparatus includes a main chassis provided with a recording head, a head carrier, a drive source, etc., a slider slidably supported by the main chassis, and a cartridge capable of being accommodated and engaged with the slider. , a cartridge holder that moves up and down as the slider moves and guides the recording medium to a predetermined position, and the main chassis includes a first notch that is opened to the outside of the main chassis. an engagement groove;
a guide groove having a second notch that similarly opens outward, and the slider has a cam groove that has a third notch that opens outward from the slider; The cartridge holder has a first engaging part that engages with the engaging groove of the main chassis, and the cartridge holder has a second engaging part that penetrates the cam groove and engages with the guide groove. configured.

[0007]Furthermore, the first engaging portion moves in the engaging groove provided in the main chassis inside the position where the first notch portion is provided. A cam groove was placed.

[0008]

Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an exploded perspective view showing a first embodiment of a 2-inch disk drive to which the present invention is applied. In the figure, 1 is a cartridge, and a magnetic disk (not shown) is housed therein. 2 is the center core of the magnetic disk. 3 is the cartridge shutter;
Normally, it is closed to protect the magnetic disk from dust. When loaded into a disk drive, it opens to expose the magnetic disk.

4 is a holder. The holder 4 is composed of cartridge holding parts each having a substantially U-shaped cross section and arranged on both sides when viewed from the insertion side of the cartridge 1, and a top plate connecting the two holding parts on the upper side. In this embodiment, the two cartridge holding parts and the top plate are integrally formed. Further, the left side surface 4a of the holder 4 has a protrusion formed through the left side surface 4a of the holder 4, which engages with an engagement recess (not shown) formed on the side surface 1a of the case of the cartridge 1. An engagement lever 5 (not shown) is provided. On the other hand, a shutter opening/closing spring 6 made of a plate spring for opening and closing the shutter 3 of the cartridge 1 is provided on the right side portion 4b. The engagement lever 5 has a protrusion 5a that engages with a protrusion 37 provided on the left side surface 27a of the main chassis 27 shown in the lower part of the figure, and is rotatably attached to the holder 4 via a shaft 9. It is biased counterclockwise when viewed from above by a spring (not shown). Also, both side portions 4a
, 4b have cam grooves 15 (15-1, 15-2, 15-3) formed on both side surfaces 14a, 14b of the slider 14.
) of the main chassis 27, both side surfaces 27a, 2
Guide grooves 28 (28-1, 28-2,
Pins 7 (7-1, 7-2, 7-3) are provided as second engaging portions that respectively engage with the pins 28-3). A pressing spring 8 for pressing the cartridge 1 is attached to the upper surface 4c of the holder 4, protrudes from an opening 10 formed in the upper surface 4c of the holder 4, and presses the center core 2 of the magnetic disk. 11 is a PG sensor, and holder 4
It detects the PG pin 12 provided on the center core 2 of the magnetic disk and generates one pulse per rotation.

The slider 14 is formed by bending a metal plate to have a substantially U-shaped cross section, and has cam grooves 15 (15-1, 15-1,
15-2, 15-3) are formed. The cam groove 15 has a sloped part 15a and a horizontal part 1 extending from both ends of this sloped part.
5b and 15c, and the holder 4 is movable in the vertical direction along this cam groove 15. Furthermore, the cam groove 15
-3 is provided with a notch 15d, which will be described in detail later. On the other hand, two guide grooves 16 are formed in the bottom portion 14c of the slider 14. Two pins 29 provided on the main chassis 27 are engaged with the guide grooves 16, respectively, so that the slider 14 is moved into the guide grooves 16.
It becomes possible to slide in the longitudinal direction. Reference numeral 18 denotes a spring hooking hole formed in the bottom portion 14c of the slider 14, into which one end of the spring 19 that urges the main chassis 27 and the slider 14 in the pulling direction is hooked. Reference numeral 21 denotes an engaging portion that engages with one end 35a of the eject lever 35 shown below the main chassis 27, and is formed by bending a part of the front end of the bottom portion 14c of the slider 14 downward. Further, on the rear side of the bottom portion 14c, similar to the engaging portion 21, the bottom portion 14c
There is a lock portion 26 that is formed by bending a portion of the trigger lever downward and engages with a trigger lever 22, which will be described later.

The spring 19 is connected to the opening 20 formed in the bottom 14c of the slider 14 and the bottom 2 of the main chassis 27.
It is arranged in the space formed by the opening 31 formed in 7c.

The main chassis 27 on which a magnetic head (not shown) is mounted is formed by bending a metal plate to have a substantially U-shaped cross section, and has side surfaces 27a and 27b that engage pins 7 of the holder 4, respectively. Guide groove 28 (28-1, 28
-2, 28-3) are formed. The guide groove 28 is formed in a substantially L-shape, and is located at the bottom 2 of the main chassis 27.
A horizontal portion 28a parallel to 7c and a vertical portion 28 perpendicular to 7c.
It has b. Furthermore, a notch 28c is formed in the guide groove 28-3. On the other hand, main chassis 27
Two pins 29 are provided on the bottom 27c of the slider 14 to engage with the guide grooves 16 of the slider 14, and the springs 19
A spring hanging hole 30 for hanging the spring 19 and an opening 31 for placing the spring 19 are formed. Two horizontal engagement grooves 40 are formed in the right side part 27b of the main chassis 27, and from one end of the engagement groove 40, the same side part 27b is formed.
A notch 41 is formed toward the upper end. This engagement groove 40 has a right side surface portion 14b of the slider 14.
An engagement pin 42 as a first engagement portion fixedly attached to the slider 14 is engaged with the slider 14 to regulate the height of the slider 14. Furthermore, on both side surfaces 27a and 27b of the main chassis 27,
An engagement hole 43 that engages with the first shutter 45 and a spring hook hole 44 for the spring 48 are formed, and both side portions 2
On the outside of 7a and 27b, there is a shaft 4 that engages with the shutter 50.
9 are fixedly installed.

A trigger lever 22 rotates around a pin 23 fixed to the bottom 27c of the main chassis 27. The trigger lever 22 has an arcuate locking portion 22a that engages with the locking portion 26 of the slider 14.
, a stopper part 22b that similarly contacts the lock part 26 of the slider 14 and defines one side of the rotation range, a lever part 22c that is bent in a direction perpendicular to the stopper part 22b, and the engagement of the holder 4. Engagement portion 2 that engages with engagement portion 13
2b is formed. The trigger lever 22 is biased clockwise (direction a in FIG. 2) about the pin 23 by a spring 25 (see FIG. 2).

A spindle motor 33 is a drive source provided on the main chassis 27, and has an engaging portion 33a that engages with the hole 2a of the center core 2 of the magnetic disk, and a spindle motor that comes into contact with the bottom surface of the center core 2 and generates a magnetic field. It has a reference surface 33b that regulates the height of the disk, and drives the magnetic disk to rotate. The cutout portion 34 at the front end of the bottom portion 27c of the main chassis 27 is provided to avoid contact with the engaging portion 21 when the slider 14 slides.

Reference numeral 35 denotes an eject lever made of a metal plate having a substantially L-shape. This eject lever 35
is pivotally supported by a pin 36 fixed to the back surface of the bottom 27c of the main chassis 27, and one end 35a is connected to the slider 1.
It engages with the engaging portion 21 of No. 4.

Next, a method of assembling the main chassis 27, slider 14, and holder 4 in the above-described configuration will be explained using FIG. 4.

First, as shown in FIG. 4(a), the engagement pin 42 fixed to the slider 14 is inserted into the notch 41 of the main chassis 27. After that, this engagement pin 4
2 reaches the end of the engagement groove 40, the spring 19 (FIG. 1)
The slider 14, which is biased by , moves on the engagement groove 40 in the direction A in the figure.

Next, the slider 14 is moved in the direction B in the figure against the urging force of the spring 19 until the notch 15d of the cam groove 15 and the notch 28c of the guide groove 28 are aligned. In this state, insert the pin 7-3 fixed to the holder 4 into the notch 15d of the cam groove 15 (the notch 28 of the guide groove 28).
c) and engage with the cam groove 15 and guide groove 28. By doing the above, the main chassis 27,
Slider 14 and holder 4 can be easily assembled. Furthermore, by engaging the pin 7-3 with the cam groove 15 and the guide groove 28, even if the slider 14 is moved in the direction B in the figure, as shown in FIG.
-3 comes into contact with the end of the horizontal portion 28a of the guide groove and cannot move any further. Therefore, the engagement pin 42 will not come off from the notch 41.

Next, the operation of the above-mentioned disk drive will be explained. 2 and 3 show the trigger lever 2
2 is a diagram showing the operation of the lock section 26, and FIG. 2 shows a state before the cartridge 1 is loaded;
FIG. 3 shows the cartridge 1 being loaded.

First, the loading operation will be explained. In FIG. 2, the lock portion 26 is biased together with the slider 14 in the direction c in the figure by the spring 19 (FIG. 1). The trigger lever 22 is moved by a spring 25 at a position a in the figure.
biased in the direction. In this state, the lock part 2
6 engages with the lock portion 22a and restricts the movement of the slider 14 in the direction c in the figure. That is, the slider 14, which is integral with the locking part 26, is locked with respect to the main chassis 27 by engagement with the locking part 22a in a state where the spring 19 (FIG. 1) is charged in the direction d in the figure. Furthermore, in this state, the stopper portion 22b is
6, the trigger lever 22 is restricted from rotating in the direction a (biasing direction) in the figure. Also,
The holder 4 (FIG. 1) is in a pre-loading position above the main chassis 27 due to the cam groove 15, guide groove 28 and pin 7.

When the cartridge 1 is inserted into the holder 4 in this state, the insertion side end 1b of the cartridge 1 comes into contact with the trigger lever 22 (lever portion 22c). When the cartridge 1 is further pushed in, the lever portion 22c is pushed by the cartridge 1, and the trigger lever 22 rotates about the pin 23 in the direction b in the figure. When pushed further, the lock portion 22a and the lock portion 26 are disengaged, and the slider 14 slides in the direction c in the figure due to the biasing force. Then, with the insertion of the cartridge 1 immediately before, the engagement lever 5 provided on the holder 4, which had rested on the side surface of the cartridge against the biasing force, engages with the engagement recess on the side surface of the cartridge 1. The holder 4 and the cartridge 1 are in a state where they move integrally. At this time, the pin 7 is in the cam groove 1
5, the guide groove 28 of the main chassis 27
move along. The holder 4 moves together with the pin 7,
It descends relative to the spindle motor 33. With this lowering, the center core 2 of the magnetic disk engages with the engaging portion 33a of the spindle motor 33. The rotation of the trigger lever 22 in the biasing direction is restricted by the engagement between the engaging portion 22d and the engaging portion 4b of the holder 4. Through this series of operations, loading is completed and the state shown in FIG. 3 is reached. In FIG. 3, the lock portion 26 is the lock portion 22a.
The slider 14 is disengaged from the slider 14 due to the bias of the spring 19.
and the loading position of the cartridge 1. The trigger lever 22 is pushed by the cartridge 1, and the spring 25
is held in the position shown in the figure in a charged state in the direction b in the figure. At this time, the engagement pin 42 is in a position where it is in contact with the right end of the engagement groove 40 in the figure, as shown in FIG. 4(c).

Next, the eject operation will be explained using FIG.

Due to the above operation, the eject lever 35
The end portion 35a is pushed by the bent portion 21 of the slider 14 and rotates around the pin 36, so that the operating portion 35b protrudes to the front. At this point, insert the eject lever 35 into the
When pushed in the direction indicated by arrow A, the end 35a of the eject lever 35 pushes the bent portion 21 of the slider 14 forward, and the slider 14 moves in the direction of ejecting the cartridge 1. With this movement, the inclined portion 15a of the cam groove 15 presses the pin 7, and therefore pushes up the holder 4.

When the eject lever 35 is further pushed, the slider 14 moves, and the locking portion 26 locks into the locking portion 22a.
It reaches the extension line of the arc of . At this time, the holder 4 is pushed upward by the cam groove 15 and the guide groove 28 via the pin 7, and the cartridge 1 is in a state where it can be ejected. Further, the engagement pin 42 is inserted into the engagement groove 40 as shown in FIG.
It is in the position shown in (d). As shown in this figure, the pin 7-3 comes into contact with the left end of the horizontal part 28a of the guide groove in the figure, and the holder 4 and the slider 14 are moved further than the horizontal part 28a in the figure.
Cannot move in any direction. Therefore, since the engagement pin 42 does not reach the notch 41, it does not come off from the engagement groove 40. On the other hand, the trigger lever 22 is rotated in the direction a in the figure by the biasing force of the spring 25, and the cartridge 1 is ejected by the lever portion 22c. At the same time, the lock portion 22a engages with the lock portion 26, and the slider 14 is prevented from moving in the direction c in the figure, and the slider 14 and holder 4 are held in the state before loading. The trigger lever 22 is
The stopper portion 22b engages with the lock portion 26 and moves in the biasing direction (
Rotation in the direction a in the figure) is restricted.

[0026] Through this series of operations, the ejecting operation is completed and each member is maintained in an unloaded state.

[0027]

As explained above, the present invention provides an engagement groove and a guide groove provided in the main chassis, and a cam groove provided in the slider, each having a cutout portion that opens outward. Therefore, assembly of the slider and holder to the main chassis became very easy.

Furthermore, considering the arrangement of the first engaging part and the cam groove in the slider, when the second engaging part is engaged with the guide groove and the cam groove, the first engaging part is engaged with the guide groove and the cam groove. Since the main chassis is prevented from coming off from the notch formed in the engagement groove, the engagement between the main chassis and the slider will not come off unless the holder is removed.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing an embodiment in which the present invention is applied to a 2-inch disk drive.

FIG. 2 is a diagram showing a state before loading a disk cartridge.

FIG. 3 is a diagram showing the state after loading of the disk cartridge is completed.

FIG. 4 is an explanatory diagram showing an assembly method and operation in the embodiment.

FIG. 5 is an explanatory diagram showing a conventional technique.

[Explanation of symbols]

1 Disc cartridge 4 Cartridge holder 7 Pin 14 Slider 15 Cam groove 15d Notch part 27 Main chassis 28 Guide groove 28c Notch part 40 Engagement groove 41 Notch part 42 Engagement pin

Claims (2)

[Claims] Claim 1: A recording medium attachment/detachment device that allows a disc-shaped recording medium housed in a cartridge to be detachably attached, comprising: a main chassis provided with a recording head, a head carrier, a drive source, etc.; a slider that is slidably biased and supported, and a cartridge holder that is capable of housing the cartridge, engages with the slider, moves up and down as the slider moves, and guides the recording medium to a predetermined position. , the main chassis has an engaging groove having a first notch opening outwardly of the main chassis, and a second engaging groove similarly opening outwardly.
a guide groove provided with a notch portion, and the slider is engaged with a cam groove provided with a third notch portion opened outward of the slider and an engagement groove of the main chassis. a first engaging portion that penetrates the cam groove and engages the guide groove; and the cartridge holder has a second engaging portion that penetrates the cam groove and engages the guide groove. Attachment and detachment device. 2. The first engaging portion moves in the engaging groove provided in the main chassis inside the position where the first notch portion is provided. 2. The recording medium loading/unloading device according to claim 1, further comprising a cam groove and a cam groove.