JP3472323B2 - Shutter release mechanism - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shutter opening mechanism for opening and closing a shutter of a cartridge, and more particularly to a shutter opening mechanism having a cartridge passage area through which a cartridge can pass.

[0002]

2. Description of the Related Art Generally, a cartridge such as an MD is provided with a shutter for protecting a disc. for that reason,
It is necessary to open and close the shutter when inserting and ejecting the cartridge into and from the player. Therefore, conventionally, an MD player or the like is provided with a shutter opening mechanism. Here, the cartridge and the shutter opening mechanism will be described with reference to FIG.

An optical disk or a magneto-optical disk is contained in the cartridge C, and a shutter S that can be opened and closed is provided.
And a lock member R for restricting the shutter S to the closed position. When the shutter S is opened, the recording surface of the disc is exposed.

The shutter opening mechanism is provided with a cartridge carrier 4 for holding the cartridge C and a shutter opening means 6 projecting inside the carrier 4.
The opening means 6 engages with the lock member R of the cartridge C inserted into the carrier 4. The moving force of the cartridge C is used to release the lock member R, and the lock member R is brought into contact with the end surface of the shutter S to open the shutter S. Such opening / closing pores are disclosed in, for example, Japanese Patent Laid-Open No. 5-174478.

[0005]

In the shutter opening mechanism as described above, the opening means 6 is fixed to the carrier 4 side, and the opening means 6 contacts the end surface of the shutter S to open the shutter S. Since it is, cartridge C
Cannot pass through the carrier 4 and move to the back side thereof. Therefore, it is impossible to arrange a stocker or the like for storing the cartridge C on the back side of the carrier 2, and the degree of freedom in design is low. Further, if the momentum when the cartridge C is inserted is too strong, the shutter S and the opening means 6 may collide with each other and either of them may be damaged.

The present invention has been proposed in view of the above circumstances, and an object thereof is to allow a cartridge to pass through a cartridge carrier with a simple structure, thereby increasing the degree of freedom in design and ensuring safety. It is to provide a shutter opening mechanism for improving the property.

[0007]

In order to achieve the above object, the invention according to claim 1 comprises a shutter which can be opened and closed, and a lock member which locks the shutter in a closed state, and accommodates a disk. be those used in the cartridge to a cartridge passing area of the cartridge can pass, and shutter opening means for opening said shutter, and an open link that takes the shutter opening means in the opening direction of the shutter, the The open link
A drive means for supplying power for opening and closing the shutter, a lock releasing means for releasing the lock member, and the shutter opening means as the shutter opening means moves in the opening direction of the shutter by the driving means. And a shutter for releasing the lock releasing means into the cartridge passage area as the shutter opening means moves in the opening direction of the shutter. And a connecting means for connecting with the opening means.

According to a second aspect of the present invention, a stocker capable of accommodating a plurality of cartridges is installed on the inner side of the cartridge passage area.

According to a third aspect of the invention, the shutter opening means is supported by the connecting means by an elastic member.

According to a fourth aspect of the present invention, a taper portion that is inclined with respect to the shutter is formed at a side edge portion of the shutter opening means that is in contact with the shutter.

[0011]

In the present invention having the above construction,
When the opening link operates and the shutter opening means moves in the opening direction of the shutter, the shutter opening means is projected by the cam into the cartridge passage area. At the same time, the unlocking means connected to the shutter opening means by the connecting means also projects into the cartridge passage area. Therefore, when the cartridge is present in the cartridge passage area, the lock release means releases the lock member of the cartridge and the shutter opening means opens the shutter of the cartridge. When the shutter opening means and the unlocking means do not project into the cartridge passage area as described above, the cartridge can pass through the cartridge passage area. Therefore, the cartridge can be moved to the inner side of the cartridge passage area.

In particular, according to the second aspect of the invention, since a stocker capable of accommodating a plurality of cartridges is installed at the inner side of the cartridge passage area, the cartridge that has passed through the cartridge passage area should be accommodated in this stocker. You can

Further, according to the third aspect of the invention, even if the shutter opening means is overloaded due to an erroneous insertion of the cartridge or the like, the elastic member supporting the shutter opening means absorbs the load. It is possible to prevent damage.

According to the fourth aspect of the present invention, even if the cartridge is inserted with a slight deviation from the cartridge passage area, the taper portion formed on the side edge portion of the shutter opening means serves as a guide and serves as the shutter opening means. The shutter can be smoothly engaged. Therefore, the shutter opening means can open the shutter without any trouble.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An MD player adopting the present invention will be specifically described below with reference to the drawings. The main members of this MD player are, as shown in FIG. 17, an insertion slot 1 into which a cartridge C is inserted, and a drive unit 2 into which the cartridge C is mounted and which reproduces a disc provided therein.
A stocker 3 installed at the back side of the drive unit 2 for accommodating four cartridges C, and a carrier 4 accommodating the cartridge C and movable up and down with respect to the drive unit 2.
And two rotatable loading rollers 5 formed on the upper surface of the carrier 4.

For convenience, the components of the MD player are divided into four.
The structure and operation will be described by dividing into two mechanisms. The four mechanisms are A. Door opening / closing mechanism, B. Carrier lifting mechanism, C.I. Power switching mechanism, D.I. It is a shutter opening mechanism. Among the above-mentioned mechanisms, the present invention relates to "D. The shutter opening mechanism ”is a feature.

[A. Configuration and operation of door opening / closing mechanism] ...
1 and 2, the insertion opening opening / closing mechanism is provided in the vicinity of the insertion opening 1, and includes a dustproof door 11, an insert shutter 12, a door opening / closing plate 13, and operation pins 14 and 15. The dustproof door 11 is supported at the upper edge of the insertion slot 1 so as to be rotatable about a support shaft 11a, and has a protruding portion 11b that protrudes laterally near the center.

The insert shutter 12 and the door opening / closing plate 13 are rotatably supported about the same support pin 16. Further, pressed portions 12a and 13a are formed at the end portions on the inner side (left side in the drawing) of the insert shutter 12 and the door opening / closing plate 13. A shutter portion 12b is formed at an end portion on the front side (right side in the drawing) of the insert shutter 12. A flip-up portion 13b that comes into contact with the protruding portion 11b of the dustproof door 11 from below is formed at an end portion on the front side (right side in the drawing) of the door opening / closing plate 13. A spring 17 is hung between the insert shutter 12 and the door opening / closing plate 13, and the elastic force of the spring 17 causes the insert shutter 12 to rotate counterclockwise in the drawing and the door opening / closing plate 13 to rotate clockwise in the drawing. Is urged by. At this time, the shutter portion 12b is in a position facing the insertion opening 1 so as to prevent the cartridge C from entering the MD player, and the flip-up portion 13b is in a substantially horizontal position (state in FIG. 2).

The operating pins 14 and 15 are, as shown in FIG. 1, an elevator plate 21 for raising and lowering the carrier 4.
It is attached inside (detailed later). This elevator plate 21 is omitted in FIG. When the elevator plate 21 is located on the most front side (close to the insertion opening 1) and the carrier 4 faces the insertion opening 1, the operation pin 1
4, 15 press the pressed portions 12a, 13a, the insert shutter 12 rotates in the clockwise direction in the figure, and the door opening / closing plate 13 rotates in the counterclockwise direction in the figure. As a result, the shutter portion 12b shifts downward from the position facing the insertion opening 1, and the flip-up portion 13b flips up the protruding portion 11b to open the dustproof door 11. (State of FIG. 1).

According to the door opening / closing mechanism as described above, the dustproof door 11 is opened only when the carrier 4 is in the position for accommodating the cartridge C from the insertion opening 1. That is, carrier 4
The cartridge C cannot be inserted from the insertion opening 1 at a position where the and the insertion opening 1 coincide with each other in the horizontal plane, and thus the erroneous insertion of the cartridge C can be reliably prevented.

[B-1. Configuration and Operation of Carrier Elevating Mechanism] See FIGS. 3 to 6. The carrier elevating mechanism is provided on the side surface of the carrier 4 and includes an elevator plate 21, a sub guide plate 22, and the like. The elevator plate 21 is supported by the casing of the MD player and is provided so as to be slidable in the front-rear direction of the MD player (left-right direction in the figure), and has a 6-step staircase-shaped cam groove 21 a and a continuous groove. And a large diameter hole 21b is formed. The support pin 4a of the carrier 4 is inserted into the cam groove 21a (and the large diameter hole 21b). The support pin 4a is provided so as to project laterally from the side surface of the carrier 4. The support pin 4a
Is further restricted in the left-right direction by a vertically elongated hole provided in the housing that supports the elevator plate 21. Therefore, when the elevator plate 21 slides, the support pin 4a moves up and down by the cam groove 21a,
Along with this, the carrier 4 moves up and down. A large-diameter portion having a diameter similar to that of the large-diameter hole 21b is formed in a portion of the vertically long hole corresponding to the large-diameter hole 21b. This large-diameter portion is provided with a guide groove 22a of the sub guide plate 22 described later.
As a result, the width is always regulated to be almost the same as that of the vertically elongated hole.

At this time, the carrier 4 is lifted up and down in a total of 7 stages, including 6 stages of the cam groove 21a and the position in the large diameter hole 21b (# 1 to # 7 in the figure). Carrier 4 is # 1
~ When reaching the position of # 4, the carrier 4 and each stage of the stocker 3 become horizontal (however, in this example, # 3 to #
The step between 4 is 1/2 of the step between # 1 and # 2 and # 2 and # 3.
Therefore, in the case of the position of # 4, the stocker 3 side needs to be raised by ½ of the step between # 1 to # 2 and # 2 to # 3. Therefore, the elevator plate 21
Is provided with a cam groove 21a, into which a pin 3a attached to the side surface of the stocker 3 is inserted, and the stocker 3 moves up and down according to the operation of the elevator plate 21).

The position # 5 of the carrier 4 indicates the position immediately before the carrier 4 is mounted on the drive unit 2. In the MD player of this embodiment, this position # 5 is an important position for opening and closing the shutter provided on the MD cartridge. That is, the position # 5 is a position immediately before the lower surface of the shutter (or the cartridge itself) of the MD cartridge arranged in the carrier 4 and the upper surface (or the pickup) of the drive unit 2 come into contact with each other, and a shutter opening mechanism described later. Is set to ensure an operable clearance. The position # 6 indicates the position at which the carrier 4 is mounted on and integrated with the drive unit 2. The position of # 7 is such that the support pin 4a is inside the large diameter hole 21b and the drive unit 2
The position where the carrier 4 united with is to secure the floating state is shown.

The sub-guide plate 22 shown in FIGS. 5 and 6 is supported by the casing of the MD player and is provided so as to be able to move up and down, and has a guide groove 22a and a large-diameter hole 22b continuous with the guide groove 22a. Has been formed. A protrusion 22c is provided below the sub guide plate 22, and a tip end portion of a guide link 24 that is rotatable about a shaft 24a is engaged with the protrusion 22c. Further, the sub guide plate 22
A spring 23, one end of which is engaged with the casing, is hooked on the upper portion, and is pulled upward by the elastic force of the spring 23. The support pin 4a of the carrier 4 is inserted through the guide groove 22a and the large diameter hole 22b. Of these, the guide groove 22a is configured to have a width slightly wider than the diameter of the support pin 4a. 5 and 6, in order to make the drawings easy to see, the illustration of the vertically long hole provided in the housing for guiding the indicator pin 4a to the left and right and the large diameter hole following it are omitted. .

Guide groove 22a of the sub guide plate 22
Is the support pin 4 especially when the carrier 4 is located at # 5.
Guide the lifting and lowering of a. As described above, the guide groove 22a
Is only slightly wider than the diameter of the support pin 4a, so that the carrier 4 is fixed without the support pin 4a wobbling. When the elevator plate 21 reaches the most retracted position as shown in FIG. 4, the sub-guide plate 22 is moved by the operation of means (not shown), and the large-diameter hole 22b formed in the plate 22 becomes The large-diameter hole 21b of 21 and the large-diameter portion formed in the vertically elongated hole of the housing overlap each other. As a result, the support pin 4a is arranged in each of the large diameter holes 22b and 21b and the large diameter portion, the regulation is released, and the carrier 4
Is in a floating state.

In the carrier elevating mechanism having the above structure, the position # 5 immediately before the carrier 4 is mounted on the drive unit 2 is set to the shutter open position, so the carrier 4 moves up and down with the shutter open. The stroke is short, and dust does not enter the cartridge C during the lifting operation.

In the present embodiment, the elevation control of the carrier 4 (that is, the sliding control of the elevator plate 22) is performed by the microcomputer controlling the MD device.

[B-2. MD Player Stop / Standby State and Carrier 4 Lifting Position] In the present embodiment, the carrier 4 raising / lowering position is predetermined according to the MD player stopped / standby state. That is, when the power of the MD player is turned off, or the disc 4 is stocked in the stocker 3, the disc is ejected, or a mode designation input such as play is waited, the carrier 4 is positioned at # 5 and stands by. When the carrier 4 is located at # 5, the support pin 4a of the carrier 4 is arranged in the guide groove 22a of the sub guide plate 22 which is slightly wider than the pin 4a.
Vibration of the sub guide plate 22 can be suppressed.
Therefore, even if vibration is applied to the MD from the outside, noise does not occur from the sub guide plate 22.

Further, the carrier 4 and the drive unit 2 are provided, for example, in Japanese Patent Application Nos. 4-329694 and 5-2026.
No. 81, if they are configured to gradually mechanically lock after their contact, even if not fully locked in position # 5, the locking member and carrier 4 or At least the drive unit 2 is in a contact state, and the carrier 4 is in a pseudo connection state with the drive unit 2. Therefore, even if excessive vibration or shock is applied to the player by standing by at the position # 5, the shock to the carrier 4 is not affected by the support pin 4a.
Not only is it dispersed in the lock member and the drive unit 2. Therefore, mechanical failure of the player is prevented.

In the present embodiment, the MD player is in a stopped state and the carrier 4 is in a standby state where it waits for some command (for example, a disc storing operation is performed after a disc storing number corresponding to the stock area of the stocker 3 is designated. When the storage 4 is executed, the carrier 4 waits for the input of the storage number, and when the disc ejection number is designated and the disc ejection operation is executed, the ejection number is input. 5 from the position 5 to the position # 2 adjacent to the insertion slot 1 and waits (FIG. 5).
State). If the carrier 4 is in this position, the stocker 3
In the predetermined stock area or the carrier 4 inside, or the predetermined stock area or the carrier 4
The disc ejection operation from can be immediately performed.

[C-1. Configuration and Operation of Power Switching Mechanism] ... See FIGS. 7 to 11. The power switching mechanism includes a change plate 31, a change link 32, a gear link 33, an operation pin 34, and a shutter opening / closing gear 35. Of these, the operation pin 34 is provided on the drive unit 2 side, and the other members are the carrier 4
It is provided on the side. In order to understand the drawings,
The gear train is omitted in FIGS. 8 and 9.

The change plate 31 is composed of a substantially T-shaped member, and slides in the front-rear direction of the MD player (left-right direction in the figure) using the rotation shafts 36a, 41a of the gears 36, 41 provided on the carrier 4 as guides. It is provided freely. A crank-shaped cam hole 31a (FIG. 8) having a high right side in the drawing is formed in the center of the change plate 31.
An arc-shaped guide groove 4b is formed on the side surface of the carrier 4 close to the cam hole 31a. A spring 31b is installed on the vertical bar portion of the change plate 31, and the elastic force of the spring 31b urges the change plate 31 to the right in the drawing. Furthermore, a pin 32b provided at the lower end of the change link 32 is engaged with an elongated hole 31c provided at the lower end of the change plate 31. The spring 31b rotates the change link 32, which will be described later, counterclockwise.
It may be provided in the link 32.

The change link 32 is composed of a substantially L-shaped member, and is rotatably arranged on the carrier 4 about the support shaft 32a. An operation pin 34 on the drive unit 2 side comes into contact with the left end portion of the change link 32 in the drawing when the carrier 4 descends.

The gear link 33 is formed of a triangular member, and transmission gears 36, 37, 38 meshing with each other are provided at respective vertices as shown in FIGS. Of these, power is supplied to the central transmission gear 36 from a drive motor (not shown) provided in the carrier 4. Further, the gear link 33 is rotatably arranged on the carrier 4 with the rotating shaft 36a of the transmission gear 36 as a supporting shaft. Further, a guide pin 37a is provided on the rotation shaft of the transmission gear 37 on the right side of the drawing, and the guide pin 37a is provided on the change plate 31.
Through the cam hole 31a and the guide groove 4b of the carrier 4.

Incidentally, roller arms 39, 39 are attached to the carrier 4 symmetrically. These roller arms 39 are rotatably provided around a central shaft 41a of a gear 41. A loading roller 5 is rotatably provided at the upper end of each roller arm 39. Further, as shown in FIGS. 10 and 11, transmission gears 40, 41 for supplying a rotational force to the loading roller 5 are rotatably provided at the central portion and the lower end portion of each roller arm 39.

The shutter opening gear 35 is composed of a spur gear and a worm gear, and has loading rollers 5 and 5.
It is rotatably provided approximately in the middle of. This gear 35
When is rotated, the shutter opening / closing mechanism described later operates.

The power switching mechanism having the above structure switches the power transmission path from the loading roller 5, 5 side to the shutter opening gear 35 side as follows. That is, when power is supplied to the loading rollers 5 and 5, the transmission gears 37 and 38 of the gear link 33 and the transmission gear 41 of the roller arm 39 mesh with each other (FIG. 10).
And the state of FIG. 7).

From this state, the carrier 4 descends, and while the carrier 4 is being mounted on the drive unit 2, the left end of the change link 32 in the drawing abuts against the operation pin 34 on the drive unit 2 side and is pressed. Therefore, the change link 32 rotates in the clockwise direction in the drawing around the support shaft 32a, and the lower end portion of the change link 32 has the change plate 3
Pull 1 to the left in the figure. Therefore, the change plate 31 slides leftward in the figure against the elastic force of the spring 31b (from the state of FIG. 7 to the state of FIG. 8).

When the change plate 31 slides to the left in the drawing, the cam hole 31a of the change plate 31 causes the guide pin 37a to rise while being guided by the guide groove 4b of the carrier 4. As a result, the gear link 33 rotates the rotating shaft 36a in the counterclockwise direction in the drawing (state of FIG. 9). As a result, the transmission gears 37, 38 are disengaged from the transmission gear 41 of the roller arm 39, and the transmission gear 3
7 and the shutter opening gear 35 mesh with each other (state of FIG. 11). By the above operation, the power switching mechanism switches the power transmission path from the loading rollers 5, 5 to the shutter opening gear 35, and the power from the drive motor is transmitted to the transmission gear 3.
It is transmitted to the shutter opening gear 35 via 6 and 37.

When the carrier 4 is further lowered after the power is switched, the carrier 4 is mounted on the drive unit 2,
Both are united. As described above, when the support pin 4a reaches the position of the cam groove # 5, the gears are switched, so that the position of # 6 is reached and the carrier 4 and the drive unit 2 are combined. Then, since the change link 32 over-rotates, the change plate 31 may also be in an overstroke state, and the engagement of the gears 37 and 35 may deviate from the optimum position. However, in the present embodiment, the cam hole 31
Since the end of the gear 35 on the gear 35 side is formed parallel to the moving direction of the change plate 31, the gear link 33 does not rotate excessively. That is, there is no fear that the above-mentioned overstroke is absorbed and the engagement state between the gears 37 and 35 is deteriorated.

When the power switching mechanism switches the power transmission path from the shutter opening gear 35 side to the loading rollers 5, 5 side, the above operation is reversed.

According to the power switching mechanism as described above, it is possible to selectively supply power to the loading roller 5 and the shutter opening / closing mechanism from a common drive motor. Therefore, it is not necessary to use two drive sources, and the configuration can be simplified. Moreover, the operation pin 34 is moved by the descending operation of the carrier 4 which approaches the drive unit 2.
Operates the power switching mechanism, so high operability is realized.

[C-2. Carrier raising / lowering operation during operation of power switching mechanism] ... See FIG. 12. In the present embodiment, the above-described power switching mechanism and a shutter opening mechanism, which will be described later, operate at the position where carrier 4 is # 5. As a pre-stage, the following carrier raising / lowering operation is performed.

That is, the carrier 4 located at # 5 performs a descending operation to once engage the positioning pin 8 provided on the upper surface of the drive unit 2 with the engaging hole provided on the lower surface of the cartridge C (state of FIG. 12). ). Thereby, the cartridge C can be positioned at an appropriate position.
Then, the carrier 4 again rises to the position of # 5. Since the rising stroke of the carrier 4 at this time is small, the position of the cartridge C does not shift.

When the position of the cartridge C is displaced, there is a possibility that the shutter opening mechanism, which will be described later, cannot be reliably engaged with the shutter S side, and the reliability of the operation is lowered. In particular, when the present embodiment is applied to an in-vehicle device, the position of the cartridge C is likely to be displaced due to external vibration. However, in the present embodiment, the above-described raising / lowering operation of the carrier 4 is performed. Allows cartridge C
Since the displacement of the position is prevented, excellent reliability can be exhibited in the shutter opening operation.

[D. Configuration and Operation of Shutter Release Mechanism] See FIGS. 13 to 16 The shutter release mechanism is disposed on the upper surface of the carrier 4, and has the shutter release gear 35, the transmission gear group 50,
The cam gear 51, the opening link 52, the opening claw member 53, the lock release lever 54, and the connecting portion 55. The carrier 4 has openings on the front side and the back side through which the cartridge C can pass, and the inside thereof is a cartridge passage area. 13 to 16 are all plan views, the plan view of the power switching mechanism portion is shown only in FIG. 13 and omitted in the other drawings.

The shutter opening gear 35 is a transmission gear group 50.
It meshes with the cam gear 51 via. Cam gear 51
A spindle-shaped cam 51a is provided on the upper surface, and a cam pin 51b is installed at the end thereof. There are three types of diameters from the center to the peripheral portion of the cam 51a: a long diameter portion, a short diameter portion, and a middle diameter portion which is an intermediate portion thereof. Detects closed state. A switch link 60 that rotates about a support shaft 60a is in contact with the cam 51a. The switch link 60 controls the detection sensor 61 (three-position detection microswitch) that detects the open / closed state of the shutter S of the MD cartridge.

The open link 52 is rotatably arranged around the support shaft 52a. A slide groove 52b is formed at the left end of the open link 52 in the figure, and the cam pin 51b of the cam gear 51 is inserted therein. A connecting portion 55 is provided at the right end of the open link 52 in the drawing with a guide pin 55.
It is rotatably provided around a.

The connecting portion 55 is a member for connecting the opening claw member 53 and the lock release lever 54, and has a cam pin 55b at the right end portion in addition to the guide pin 55a. The opening claw member 53 is fixed to the connecting portion 55,
It is composed of a leaf spring 56 and an opener 57. The leaf spring 56 is fixed to the connecting portion 55, and a wedge-shaped opener 57 is provided at the tip thereof.

By the way, a guide plate 58 is arranged at the right edge of the carrier 4 in the figure. A guide groove 58a and a cam groove 58b are formed in the guide plate 58, and the guide pin 55a and the cam pin 55b of the connecting portion 55 are inserted therein. The guide groove 58a is a linear groove, and the cam groove 58b is the inner side (upper side in the figure).
It is a groove that draws a gentle curve toward the outside near the end. The carrier 4 is provided with a tolerance absorbing spring (not shown) for absorbing the tolerance of the cartridge C.

The lock release lever 54 is a support shaft 54a.
Is rotatably provided on the guide plate 58 about the center and is biased in the counterclockwise direction by a torsion coil spring 54z. Further, a release claw 54b is formed at the rear end of the lever 54. The release claw 54b is a member that releases the lock member R that locks the shutter S in the closed position. A recess R1 is formed on the right side edge of the lock member R.

Further, the lock release lever 54 is formed with a J-shaped claw 54c (see FIG. 16). The claw 54c is adapted to engage with the guide pin 55a of the connecting portion 55. Slots are formed in the side surface of the carrier 4 facing the lock release lever 54 and the opener 57, respectively, in the disc transport direction.

The shutter opening mechanism having the above structure operates as follows. First, as shown in FIG. 13, the cartridge C in which the shutter S is closed is attached to the carrier 4
, The hook claw 54c is engaged with the guide pin 55a, and the lock release lever 54 and the connecting portion 5 are engaged.
Both 5 are located on the deepest side. At this time, the release claw 5
4b and the opener 57 do not project into the carrier 4 through the elongated holes. Further, the middle diameter portion of the cam 51a is in contact with the switch link 60, and the detection sensor 61 detects the fully closed state of the shutter S based on the rotational position of the open link 52.

In this state, when the power transmission path is switched from the loading rollers 5, 5 side to the shutter opening gear 35 side by the power switching mechanism, the drive motor is energized and the shutter opening gear 35 is released. The turning force is transmitted to the cam gear 51 via the transmission gear group 50. Therefore, the cam gear 51 rotates counterclockwise in the figure (see FIG. 14). At this time, since the shutter opening gear 35 is a worm gear, excellent operation accuracy can be exhibited.

When the cam gear 51 rotates counterclockwise in the figure, the cam pin 51b pushes it inward (upper side in the figure) while sliding the slide groove 52b of the opening link 52 rightward in the figure. Therefore, the open link 52 rotates about the support shaft 52a in the clockwise direction in the figure. Therefore, the connecting portion 5 provided at the right end portion of the open link 52 in the figure.
5 starts moving to the front side (lower side in the figure). Then, the guide pin 55a and the cam pin 55b of the connecting portion 55 move along the guide groove 58a and the cam groove 58b of the side plate 58. When the cam pin 55b passes through the curved portion of the cam groove 55b, the connecting portion 55 moves in the front direction and pivots in the clockwise direction in the figure around the guide pin 55a. Further, the claw 54c is pushed forward by the movement of the guide pin 55a, and the lock release lever 54c
Rotates in the counterclockwise direction in the figure about the support shaft 54a.

As a result, the release claw 54b of the lock release lever 54 and the opener 57 project into the carrier 4 (see FIG. 15). Then, the release claw 54b abuts on the lock member R, and the opener 57 is fitted in a hole (not shown) provided in the shutter S. When the cam gear 51 continues to rotate and the tip of the release link 52 moves further to the front side, the release claw 54b pushes the lock member R to unlock the shutter R.

When the cam gear 51 further rotates in the counterclockwise direction in the drawing and the opening link 52 further rotates in the clockwise direction in the drawing about the support shaft 52a, the claws 5 of the connecting portion 55.
4c separates from the guide pin 55a, the connecting portion 55 and the lock release lever 54 are separated, and the connecting portion 55 and the opening claw member 53 move to the front side. By this movement, the opener 57 opens the shutter (the state of FIG. 16).

When the cam gear 51 rotates counterclockwise in the figure and the portion contacting the switch link 60 shifts from the medium diameter portion to the short diameter portion (from FIG. 13 to FIG. 14), the switch link 60 becomes It rotates counterclockwise in the figure. In this case, the detection sensor 61 detects that the shutter S is moving. Then, when the cam gear 51 contacting the switch link 60 shifts from the short diameter portion to the long diameter portion (from FIG. 15 to FIG. 16), the switch link 60 rotates clockwise in the drawing. In this case, the detection sensor 61 detects that the shutter S is in the fully open state.

After the shutter S is fully opened, the lock member R
Release claw 54b of the lock release lever 54 in the recess R1 of
And the lock member R returns to the initial state. The M
Although the temperature inside the device D becomes considerably high due to the heat generated by the laser light source and various motors, in this embodiment, since the lock member R is returned to the initial state as described above, the lock member undergoes plastic deformation. There is no fear.

In the shutter opening mechanism as described above, after the cartridge C is transported into the carrier 4,
Since the opener 57 and the lock release lever 54 project into the carrier 4, the cartridge C can pass through the carrier 4 as appropriate. Therefore carrier 4
It is possible to arrange the stocker 3 on the back side of the. Further, even if the opener 57 is overloaded as when the cartridge C is inserted while the shutter S is open, the leaf spring 56 supporting the opener 57 absorbs the overload.
The open claw member 53 is not damaged. In this case, the opener 57 can be finally fitted into the hole of the shutter S by the movement of the opener 57, and then the shutter opening / closing operation can be performed without any trouble. Further, even when the cartridge C is inserted in a state in which it is slightly inclined with respect to the carrier 4, the side surface of the wedge-shaped opener 57 serves as a guide, and the opener 57 is opened.
The shutter and the shutter can be reliably engaged with each other. Further, in this embodiment, the loading roller 5, the power switching mechanism and the shutter opening / closing mechanism are integrally incorporated in the carrier 4, so that the assembly is easy and the structure can be simplified.

The present invention is not limited to the above-described embodiment. For example, as shown in FIG. 18, as another embodiment of the open claw member 63, the fulcrum of the leaf spring 56 with respect to the connecting portion 55 is a fulcrum. May be arranged on the front side instead of the back side. Furthermore, as shown in FIG. 19, the present invention can be applied to an MD player equipped with a cartridge magazine M. The cartridge magazine M can accommodate a plurality of cartridges, and the insertion direction of the cartridge C into this magazine M (direction of arrow A) is the direction of the arrow written in advance on the cartridge C. On the other hand, even when the cartridge C is set to be pulled out from the magazine M in the direction of the arrow B in the player, the shutter can be easily opened and closed according to the present invention.

[0062]

As described above, according to the present invention, since the cartridge can pass through the inside of the cartridge carrier, there is provided a shutter opening mechanism for increasing the degree of freedom in design and improving the safety. I was able to.

[Brief description of drawings]

FIG. 1 is a side view showing a door opening / closing mechanism of an MD player using one embodiment of the present invention (door open state).

FIG. 2 is a side view showing a door opening / closing mechanism of the MD player using this embodiment (door closed state).

FIG. 3 is a side view showing a carrier lifting mechanism of an MD player using this embodiment (the position of the carrier 4 is # 1).

FIG. 4 is a side view showing a carrier lifting mechanism of an MD player using this embodiment (the position of the carrier 4 is # 7).

FIG. 5 is a side view showing a carrier lifting mechanism of the MD player using this embodiment (the position of the carrier 4 is # 2).

FIG. 6 is a side view showing the carrier lifting mechanism of the MD player using this embodiment (the position of the carrier 4 is # 5).

FIG. 7 is a side view showing a power switching mechanism of an MD player using this embodiment.

FIG. 8 is an enlarged side view showing a power switching mechanism of an MD player using this embodiment (a state in which power is transmitted to the loading roller 5 side, but a gear train is omitted).

FIG. 9 is an enlarged side view showing a power switching mechanism of an MD player using this embodiment (a state in which power is transmitted to the shutter opening / closing gear 35 side, but a gear train is omitted).

FIG. 10 is a side view showing a gear group of a power switching mechanism of an MD player using this embodiment (a state in which power is transmitted to the loading roller 5 side).

FIG. 11 is a side view showing a gear group of a power switching mechanism of an MD player using this embodiment (a state in which power is transmitted to the shutter opening / closing gear 35 side).

FIG. 12 is a side view showing the lifting and lowering operation of the carrier during the operation of the power switching mechanism of the MD player according to the present embodiment.

FIG. 13 is a plan view showing a shutter opening mechanism of an MD player using this embodiment (closed state of shutter S).

FIG. 14 is a plan view showing the shutter opening mechanism of the MD player using this embodiment (the shutter opening mechanism is in the middle of operation).

FIG. 15 is a plan view showing the shutter opening mechanism of the MD player using this embodiment (the shutter opening mechanism is in the middle of operation).

FIG. 16 is a plan view showing a shutter opening mechanism of an MD player using this embodiment (shutter S opened state).

FIG. 17 is a side view showing an outline of an MD player using the present invention.

FIG. 18 is a plan view of an opening claw member that is another embodiment of the present invention.

FIG. 19 is a plan view showing another embodiment of the MD player using the present invention.

FIG. 20 is a plan view showing the outline of a conventional MD player.

[Explanation of symbols]

1 insertion slot 2 drive unit 3 stocker 4 career 5 loading roller 6 Shutter opening means 8 Positioning pin 11 doors 12 Insert shutter 13 Door opening / closing plate 14,15 Operation pin 16 Support pins 17,23 spring 21 elevator plate 22 Sub guide plate 31 change plate 32 Change Link 33 gear link 34 Action Pin 35 Shutter open / close gear 36, 37, 38, 40, 41 Transmission gear 39 Roller arm 50 transmission gear group 51 cam gear 52 open link 53 Open claw member 54 Lock release lever 55 Connection 56 leaf spring 57 opener 58 Guide plate 58b cam groove 60 switch links 61 detection sensor 63 Open claw member C cartridge R lock member S shutter

Front page continuation (72) Inventor Satoshi Sugano 5-35-2, Hakusan, Bunkyo-ku, Tokyo Clarion Co., Ltd. (56) Reference JP-A-6-58454 (JP, A) Mitsuihei 5-67942 ( JP, U) Actual development Sho 61-16753 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) G11B 17/26 G11B 17/04

Claims (4)

(57) [Claims] 1. A cartridge passage area, comprising: a shutter that can be opened and closed, and a lock member that locks the shutter in a closed state, the cartridge passage area through which the cartridge can pass, and the shutter. Shutter opening means for opening the shutter, an opening link for moving the shutter opening means in the opening direction of the shutter, and power for opening and closing the shutter on the opening link.
Drive means for supplying , lock releasing means for releasing the lock member, and projecting the shutter opening means into the cartridge passage area as the shutter opening means moves in the opening direction of the shutter by the driving means. And a connecting means for connecting the unlocking means and the shutter opening means so that the unlocking means projects into the cartridge passage area as the shutter opening means moves in the opening direction of the shutter. And a shutter opening mechanism. 2. The shutter opening mechanism according to claim 1, wherein a stocker capable of accommodating a plurality of cartridges is installed on the inner side of the cartridge passage area. 3. The shutter opening means is supported by the connecting means by an elastic member.
Alternatively, the shutter opening mechanism described in 2. 4. The shutter opening mechanism according to claim 1, wherein a side edge portion of the shutter opening means that comes into contact with the shutter is inclined with respect to the shutter.