JP3264755B2 - Detecting device and disk device using this detecting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detection device for detecting the amount of movement of an object that moves linearly, and to a disk selection type disk device using the detection device.

[0002]

2. Description of the Related Art FIG. 14 shows a conventional magazine selection type disk drive. This disk device is disclosed in, for example, Japanese Patent Application Laid-Open No. 4-113552. In this disk device, a magazine 92 is held movably in and out of a housing 91, and a plurality of disks D are stored in the magazine 92. As shown in FIG. 14, in a state in which the magazine 92 protrudes out of the housing 91, a disc selecting member including a feed roller 93 driven by a motor and a driven roller 94 pressed against the feed roller 93 is shown. Move up and down to a position where you can select one of the disks. One of the selected disks is pushed out of the magazine 92 and is nipped between the feed roller 93 and the driven roller 94. When the disk D is pulled out by the rotation of the feed roller 93, the disk D is guided between the chassis 95 of the reproduction unit and the clamp arm 96 supported by the chassis. Then, the clamp arm 96 descends, and the disc D is held between the turntable 97 and the clamper 98. Thereafter, the magazine 92 is pulled into the housing 91, and the magazine 92 is stored at a position above the descending clamp arm 96. In this magazine storage state, the disk D is driven to rotate together with the turntable 97, and a reproducing operation is performed.

[0003]

In the disk device having the above-described structure, it is necessary to detect the clamp state and the unclamped state of the disk in the reproducing unit, and further, a disk selecting member comprising a feed roller 93 and a driven roller 94. It is necessary to detect the vertical movement position of the camera. for that reason,
The number of detection members increases. Also, with a single drive member,
The lifting and lowering operation of the clamp arm 96 and the two rollers 9
It is conceivable to detect the switching to each mode by detecting the movement position of the driving member by performing the up-down driving of 3,94, but in this case, the moving distance of the driving member becomes long, and thus the detection element However, it is necessary to use the one with a very long operating range.

The present invention solves the above-mentioned conventional problems, and provides a detection device capable of detecting the moving position of a detected object with high accuracy by a detecting element having a drive range shorter than the moving distance of the detected object. This is the first object. A second object of the present invention is to make it possible to detect a plurality of modes of a magazine selection type disk device with high accuracy by using the detection device.

[0005]

SUMMARY OF THE INVENTION A detecting device according to the present invention comprises a detection object which moves linearly, a detection element whose detection output changes by a linear movement input, a parallel portion along a moving direction of the detection object, and a parallel portion. A variable guide portion having a portion that bends from the portion, and a variable member that moves along the variable guide portion and moves with the object to be detected, and a detection input unit of the detection element is provided in accordance with the movement of the variable member. It is characterized by being driven.

Further, the present invention provides a disk storage portion for storing a plurality of disks, a linearly-moving driving member, a disk driving portion for performing disk clamping and unclamping operations by the driving force of the driving member, A disk selecting member that is moved to a position for selecting any one of the disks by the moving force of the driving member, wherein the driving member is a detection target of the detection device. Further, when the disc selecting member is moved by the driving member, the moving member moves along the parallel portion of the moving guide portion.

[0007]

In the first means, when the object to be detected moves linearly, the moving member moves with the object. However, since the movable member moves along the movable guide portion, when the movable member moves along the parallel portion of the movable guide portion, the movement between the movable member and the object to be detected has a one-to-one relationship. Further, when the movable member moves along the curved portion of the movable guide portion, the amount of movement of the movable member is smaller than the amount of movement of the object to be detected. Since the detecting element is driven in accordance with the movement of the moving member, even if the moving distance of the object to be detected is long, a detecting element having a shorter stroke can be used. In addition, if the detection requiring accuracy is performed while the moving member is moving in the parallel portion, the detection output at this time is the same as the movement of the object to be detected.
High accuracy related to one to one.

In the second means, the disk is clamped and unclamped by the linear movement of the drive member, which is the object to be detected, and the disk selection member is driven. Since the detection of the moving position of the disc selecting member requires accuracy, the disc selecting member can be driven when the changing member is moving along the parallel portion of the changing guide portion. The detection of the movement position is performed with high accuracy, one-to-one with the movement amount of the driving member.
In addition, it becomes possible to use a detecting element having a shorter stroke than the moving amount of the driving member.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. 1 and 2 are perspective side views showing an on-vehicle disk device as an embodiment of the device using the detection device of the present invention according to operation, FIG. 3 is an exploded perspective view showing a part of a lower structure of the device, FIG. 4 is an exploded perspective view showing a part of the upper structure of the apparatus,
FIG. 5 is an exploded perspective view showing a part of the internal structure of the apparatus, and FIG. 6 is a partial perspective view showing a part of one side surface of the apparatus. FIG.
Reference numeral 1 in FIG. The housing 1 includes a lower chassis 2 (see FIG. 3) and an upper chassis 3
(See FIG. 4), and both chassis 2 and 3 are joined to each other by screws. A reproduction unit 4 is provided on a lower chassis 2 of the housing 1, and a magazine holder 5 is provided on the upper chassis 3 (a).
It is supported movably in the-(b) direction. In this disk device, a plurality of disks D (3 in the illustrated embodiment) are used.
The loaded magazines M are loaded into the magazine holder 5 from the front of the apparatus in the direction (a). Figure 1 shows disk D
Indicates a state in which reproduction driving is performed. At this time, one of the disks D in the magazine M is clamped in the reproduction unit 4. The magazine holder 5 is housed in the housing 1 so as to overlap the reproduction unit 4 on which the disk D is clamped.

FIG. 2 shows a state where the disk D is pulled out from the magazine M or the disk D is returned. At this time, the magazine holder 5 advances in the (b) direction, a part of the magazine holder 5 and a part of the magazine M protrude out of the housing 1, and the clamp of the disk D is released in the reproducing unit 4. Then, returning the disk D after the reproduction to the magazine M that is advancing,
Alternatively, the selected disk D is pulled out of the magazine M. In addition, loading of the magazine M into the device,
Alternatively, the ejection (ejection) is performed in a state where the magazine holder 5 is overlaid on the reproduction unit 4 as shown in FIG.

As shown in FIG. 3, a motor m is mounted in the lower chassis 2 of the housing 1. In this example,
By the power of this one motor m, the magazine holder 5 is driven in the directions (a) to (b), the disk is clamped and released in the unit 4, the disk is selected in the magazine M, and the detection device is driven. Various driving operations are performed. As shown in FIGS. 3 and 4, the drive mechanism 10 that performs the operations of the above-described units by the power of the motor m is provided separately for the lower chassis 2 and the upper chassis 3. As shown in FIG. 3, a first drive lever 11 is supported inside the side plate 2a of the lower chassis 2 so as to be slidable in (a)-(b) directions. FIG. 3 of the first drive lever 11
A rack 11a is formed at the lower part of the left surface in the figure. A pinion gear 12 that meshes with the rack 11a is provided on the bottom surface of the lower chassis 2, and the power of the motor m is transmitted to the pinion gear 12 at reduced speed. It is driven in the-(b) direction.

As shown in FIG. 4, a selection drive lever 13 is provided inside the side plate 3a of the upper chassis 3 as shown in FIGS.
It is movably supported in the direction. A connection protrusion 13a is provided below the selection drive lever 13, and the first drive lever 11
Is formed with a corresponding concave portion 11b. The first drive lever 11 and the selection drive lever 13 can be integrally moved in the directions (a) and (b) by fitting the connection protrusion 13a into the recess 11b.
As shown in FIG. 3, a second drive lever 14 is supported on the outer surface of the side plate 2a of the lower chassis 2 so as to be slidable in (a)-(b) directions. At the rear end of the second drive lever 14,
The connecting arm 16 is rotatably supported by the pin 15. The connecting arm 16 has a bifurcated shape, and a control pin 17 and a lock pin 18 are fixed to each arm.
The control pin 17 passes through a long groove 2b formed in the side plate 2a of the lower chassis 2 and is inserted into a crank groove 11c formed in the first drive lever 11. The lock pin 18 is inserted into a lock groove 2c formed in the side plate 2a.

The crank groove 11c has an upper horizontal portion (a), an inclined portion (b) and a lower horizontal portion (c) formed continuously, and the lock groove 2c has (a).
An upward recess (d) is formed at the side end, and a downward recess (e) is formed at the (b) side end. As shown in FIG. 7, when the control pin 17 is located in the upper horizontal portion (a) of the crank groove 11c, the lock pin 18 is in the lock groove 2c.
The second drive lever 14 is locked to the side plate 2a. When the control pin 17 is located in the inclined portion (b) of the crank groove 11c, the lock pin 18 is disengaged from the concave portion (d), and the lock of the second drive lever 14 with respect to the side plate 2a is released. And the second drive lever 14 together (a)-(b)
You can move in any direction. Further, as shown in FIG. 9 and subsequent figures, when the control pin 17 enters the lower horizontal portion (c) of the crank groove 11c, the lock pin 18 enters the concave portion (e) of the lock groove 2c, and the second drive lever 14 Is locked to the side plate 2a.

The second drive lever 14 is formed with a rack 14a. A shaft 2 is attached to a side plate 2a of the lower chassis 2.
0 is rotatably supported, and a gear 21 is fixed to the tip of the shaft 20. The gear 21 is formed by integrating a small-diameter gear 21a and a large-diameter gear 21b, and the small-diameter gear 21a can mesh with the rack 14a. A support shaft 22 is fixed to the side plate 2a, and a gear 23 is rotatably supported on the support shaft 22. The gear 23 is a large-diameter gear 21b of the gear 21.
Is engaged with. As shown in FIG. 4, a pair of guide grooves 3b and 3c extending in the directions (a) to (b) are formed in the side plate 3a of the upper chassis 3 of the housing 1. A pair of protrusions 5a and 5b are formed on a side surface of the magazine holder 5 provided in the upper chassis 3, and each of the protrusions 5a and 5b is a guide groove 3b.
And 3c. Upper chassis 3
A rack plate 24 is provided outside the side plate 3a.
The rack plate 24 is fixed to the projections 5a and 5b by screws 25, whereby the magazine holder 5 and the rack plate 2 are fixed.
4 are integrated with each other so that they can move in directions (a) to (b). And the gear 23 shown in FIG.
It meshes with the rack teeth 24 a of the rack plate 24.

When the first drive lever 11 is driven by the motor m in the direction (a) or (b), the connecting arm 1
6 together with the second drive lever 14 (b)
Or it is driven in the (b) direction. At this time, the small-diameter gear 21 of the gear 21 is moved by the rack 14a of the second drive lever 14.
a is given a rotational force. This rotational force is applied to the large-diameter gear 21b.
Is transmitted to the gear 23 meshing with. A driving force in the direction (a) or (b) is applied to the rack teeth 24a meshing with the gear 23, and the rack plate 24 and the magazine holder 5 integrated therewith are moved in the direction (a) or (b). Will be driven. Here, the moving force of the rack 14a of the second drive lever 14 is applied to the small-diameter gear 21a, and further, the moving force is applied to the rack teeth 24a of the rack plate 24 via the large-diameter gear 21b and the gear 23 integrated therewith. Therefore, the moving speed and the moving amount of the second drive lever 14 are increased and transmitted to the rack plate 24 and the magazine holder 5.

Next, the drive mechanism 10 and the reproduction unit 4
The relationship between the clamp operation and the clamp release operation will be described. As shown in FIG. 1, FIG. 2 and FIG. 3, oil dampers 6 are provided at a plurality of locations on the bottom of the lower chassis 2 of the housing 1, and the unit chassis 30 of the reproducing unit 4 It is supported by.
As shown in FIG. 5, a turntable 31 on which a disk D is installed is provided in a unit chassis 30 of the reproducing unit 4.
And a spindle motor for driving the turntable 31 is provided below the unit chassis 30. An optical head 32 is provided on the unit chassis 30, and a mechanism for moving the optical head 32 along the recording surface of the disk D is also provided on the lower surface of the unit chassis 30.

A pair of support plates 33, 33 are provided at the (a) side end of the upper surface of the unit chassis 30, and support shafts 34, 34 are fixed to the upper portions of the respective support plates 33, 33. A clamp arm 35 is provided above the unit chassis 30. A clamper 36 facing the turntable 31 is rotatably supported at the tip of the clamp arm 35. Support holes 35a, 35a are formed on both sides of the base of the clamp arm 35, and the support holes 35a, 35a are rotatably supported by the support shafts 34, 34, whereby the clamp arm 35 is moved to the position shown in FIG. It can rotate between the clamped posture shown in FIG. 2 and the clamp release posture shown in FIG. The unit chassis 3
A bent piece 30a is formed on the side of the "0". A clamp drive lever 37 is provided on the outer surface of the bent piece 30a as shown in FIG.
It is slidably mounted in (b) direction. The clamp drive lever 37 is always (A) by a spring (not shown).
Biased in the direction. The clamp drive lever 37 has a drive hole 37a. A leg 35b is integrally formed at the base of the clamp arm 35, and a pin 38 fixed to a lower end of the leg 35b is inserted into the drive hole 37a. As shown in FIG. 3, a moving lever 39 is provided on the bottom of the lower chassis 2 as shown in FIGS.
It is supported so that it can move linearly in the direction. A driving pin 41 fixed to the moving lever 39 is inserted into a hole 37b of the clamp driving lever 37.

As shown in FIG. 3, the tip of the moving lever 39 is connected to an intermediate portion of the swing lever 42 by a pin 44. The swing lever 42 is swingably supported at the bottom of the lower chassis 2 by a support pin 43, and a connecting pin 45 is fixed to the lower surface of the tip. An arc groove 2 d having a predetermined radius centered on the support pin 43 is provided at the bottom of the lower chassis 2.
Are formed. The connecting pin 45 extends below the lower chassis 2 through the arc groove 2d.
5 is a connecting groove 14 formed in the second drive lever 14.
b. When the second drive lever 14 moves in the direction (a) or (b), the swinging lever 42 is swung about the support pin 43 as a fulcrum by the connecting groove 14b, and the moving lever 39 is moved by the swinging lever 42 to ( It is driven in the direction a) or b). Pin 4 on swing lever 42
Due to the difference in the turning radius between the support lever 43 and the support pin 43, the linear movement distance of the moving lever 39 is shorter than the linear movement distance of the second drive lever 14 in the directions (a) to (b). When the moving lever 39 moves in the (b) direction in this way, as shown in FIG. 2, the driving pin 41 fixed to the moving lever 39 drives the clamp driving lever 37 in the (b) direction. The clamp arm 35 connected to the clamp drive lever 37 by the pin 38 rotates counterclockwise with the support hole 35a as a fulcrum.
6 rises away from the turntable 31 and the disk D
Is released. At this time, the drive pin 41
Enters the restraining groove 37c formed at the edge of the hole 37b of the clamp drive lever 37, so that the unit chassis 30 supported by the oil damper 6 is locked with respect to the lower chassis 2.

Next, when the moving lever 39 moves in the direction (a), the driving pin 41 separates from the restraining groove 37c, and the clamp driving lever 37 returns in the direction (a) by the urging force of a spring (not shown). Due to the returning operation in the direction (a), the clamp arm 35 rotates clockwise about the support hole 35a, and the disc D is clamped by the turntable 31 and the clamper 36 as shown in FIG. State. As shown in FIG. 1, in the reproducing driving state in which the disk is clamped, the driving pin 41 is located substantially at the center of the hole 37 b of the clamp driving lever 37. Therefore, the unit chassis 30 is not restrained by the drive pin 41 and is in a state of being elastically supported by the oil damper 6. Unit chassis 30 and clamp arm 35
A disc guide member 47 made of resin is provided between the two. The disk guide member 47 has arc-shaped regulating surfaces 47a and 47b facing the outer periphery of the disk D when the disk D is clamped. A support hole 30b is formed at a position slightly (b) side of the center of the left side surface of the unit chassis 30 in the figure, and a support pin 47c provided at an end of the disk guide member 47 on the (b) side is provided with a support hole. 30b is rotatably inserted.
A pair of left and right connection pins 47d, 47d are formed on the upper side of the disk guide member 47 on the side (a).
d and 47d are elongated holes 35 formed in the clamp arm 35.
c, 35c.

As a result, as shown in FIG. 1, when the clamp arm 35 is rotated clockwise about the support hole 35a located on the side (a) as a fulcrum and the disc is clamped by the clamper 36, The member 47 rotates counterclockwise about the support pin 47c. At this time, the disk guide member 47 is substantially parallel to the upper surface of the unit chassis 30, and faces the outer periphery of the disk D which rotates while the regulating surfaces 47a and 47b are clamped. Further, as shown in FIG. 2, the clamp arm 35 has a support hole 35a.
When the disk guide member 47 rotates counterclockwise with the fulcrum as a fulcrum, the disk guide member 47 rises clockwise with the support pin 47c as a fulcrum. A guide wire 48 made of a metal wire is rotatably supported at the (a) side end of the disc guide member 47, and the other end of the guide wire 48 is in the support hole 30 c on the upper surface of the unit chassis 30. It is supported in a movable state. As a result, as shown in FIG. 2, when the clamp arm 35 is raised and the disc guide member 47 is rotated upward with the support pin 47c as a fulcrum, the guide wire 48 is moved upward with the support portion of the support hole 30c as a fulcrum. As a result, the disk (D) side end of the unclamped disk D is lifted above the unit chassis 30.

As shown in FIG. 3, a unit restraining plate 51 is provided at the bottom of the lower chassis 2. The unit restraining plate 51 is made of sheet metal, and has a notch 51a formed at the center thereof so that the oil damper 6 faces upward. A guide groove 51 b is formed in the unit restraining plate 51, and the guide groove 51 b is slidably fitted to a guide piece 2 e bent at the bottom of the lower chassis 2, whereby the unit restraining plate 51 extends along the bottom surface of the lower chassis 2. (A)-(b). A drive pin 5 is provided at the end of the swing lever 42 provided on the bottom of the lower chassis 2.
2 are integrally formed, and the driving pin 52 is fitted in the groove 51 d of the unit restraining plate 51. As a result, when the second drive lever 14 moves in the (b) direction and the swing lever 42 is driven in the counterclockwise direction, the unit pin 51 is driven in the (a) direction by the drive pin 52.

A pair of restricting pieces 51e, 51e are formed at the (a) end of the unit restricting plate 51. On the other hand, as shown in FIG. 5, downward bent pieces 30d, 30d are formed on the (b) side edge of the unit chassis 30, and restraint grooves 30e, 30e are formed in the bent pieces 30d, 30d. I have. When the unit restraining plate 51 is driven in the direction (a), the restraining pieces 51e, 51e are moved to the restraining grooves 30e, 30e.
Fits. That is, as shown in FIG.
When the clamp of the disk is released, the unit chassis 30 is restrained by the drive pins 41 and the unit chassis 30 is also restrained by the unit restraining plate 51, and the reproducing unit 4 is locked.

As shown in FIG. 3, the unit restraining plate 5
1, a pair of support pieces 51f, 51f are formed by bending,
A support hole 51 is provided at the upper end of each support piece 51f, 51f.
g and 51g are formed. Both supporting pieces 51f and 51f
Is provided with a shielding member 53 made of resin.
Support pins 53a, 53
The support pins 53a, 53a are rotatably supported in the support holes 51g, 51g. The shielding member 53 is urged clockwise in FIGS. 1 and 2 by a spring 54. The unit restraint plate 5
A restricting piece 51h is bent on one of the support pieces 51f. When the restricting piece 51h hits one end 53c of the shielding member 53, the shielding member 53 is rotated by the urging force of the spring 54. The angle limit is determined. As shown in FIG. 2, when the magazine holder 5 and the magazine M are moving in the (b) direction, the upper edges 53b, 53b of the shielding member 53 abut against the lower surface of the magazine M, thereby causing the inside of the magazine M to move. Is prevented from entering the lower side of the magazine M.

As shown in FIGS. 1, 2 and 3, a feed roller 55 is provided on the (b) side of the lower chassis 2. The feed roller and a driven roller 71 described later constitute a disk selecting member. Shaft 5 of feed roller 55
Both ends of 5a are rotatably supported by a roller support plate 56. The lower chassis 2 is provided with a motor separate from the motor m serving as a drive source of the drive mechanism 10. A gear train 57 is provided on the side of the motor support plate 56, and the power of the motor is transmitted to the shaft 55 by the gear train 57.
a, and the feed roller 55 is driven in both forward and reverse directions. A notch 56e is formed at the center of the roller support plate 56, and the support pieces 51f, 51f of the unit restraining plate 51 and the shielding member 53 face upward from the notch 56e. Also, (b) on both sides of the roller support plate 56
Support holes 56a and 56b are formed on the side, and one support hole 56a is provided on the support piece 2f of the unit chassis 2 shown in FIG.
Is supported by a support shaft 58a fixed to the support shaft 58a.

FIG. 6 is a perspective view of the housing 1 as viewed from the symmetric side of FIGS. In FIG. 6, the magazine holder 5 protrudes obliquely toward the front in the drawing, so that the arrow directions (a)-(b) are opposite to those in FIGS. FIG. 6 shows a state in which the other side plate 2g of the lower chassis 2 and the other side plate 3d of the upper chassis 3 are fixed to each other. A support shaft 58b is fixed to the inner surface of the side plate 2g of the lower chassis 2 on the near side in the drawing, and a support hole 56b of the roller support plate 56 is rotatably supported by the support shaft 58b. That is, the roller support plate 56 is supported on both sides by the support shafts 58a and 58b, and is rotatable in the directions (c) to (d).

As shown in FIG. 6, elongated holes 3e and 3f are formed in the side plate 3d of the upper chassis 3 to support the magazine holder 5 so as to be movable in the directions (a) and (b). A notch 3g is formed at the edge of the upper surface of the. Immediately below the notch 3g, a biasing lever 61 is rotatably supported on a side plate 3d by a support shaft 62. A hole 56c is provided below the support hole 56b of the roller support plate 56.
Is formed, and the pin 6 fixed to the end of the connecting lever 63
5 is rotatably supported in the hole 56c. A connecting piece 63a is bent at the other end of the connecting lever 63,
The connecting piece 63a is inserted into the hole 61a of the urging lever 61, and the urging lever 61 and the connecting lever 63 are connected. A spring 64 is hung between the connecting piece 63a of the connecting lever 63 and the side plate 3d of the upper chassis 3, and the pulling force of the spring 64 pulls the connecting lever 63 in the direction (a) to support the roller. The plate 56 is urged in the direction (d) with the support holes 56a and 56b as fulcrums, and the urging lever 61 is urged in the direction (e). A bent piece 61b is formed on the upper part of the urging lever 61, and the bent piece 61b is slidably pressed from the inside of the notch 3g to the upper edge 5d of the side plate 5c of the magazine holder 5.

The upper edge of the side plate 5c of the magazine holder 5 has a straight portion (f) and an inclined portion (g) at the end of the side (a).
As shown in FIG. 6, when the bent piece 61b of the urging lever 61 slides on the linear portion (f) of the side plate 5c, the urging lever 61 is rotated in the (-) direction, Therefore, the connecting lever 63 is pushed out in the direction (b), the roller support plate 56 rotates in the direction (c), and the feed roller 55 is lowered. When the magazine holder 5 moves in the direction (b) and reaches the position shown in FIG. 2, the bent piece 61b of the urging lever 61 is inclined (g) at the upper edge 5d of the side plate 5c of the magazine holder 5.
And the urging lever 6 is urged by the urging force of the spring 64.
1 rotates in the (e) direction. Thereby, the connecting lever 63
Is pulled in the direction (a). Therefore, the roller support plate 56 rotates in the direction (d) with the support holes 56a and 56b as fulcrums, and the feed roller 55 is lifted.

As shown in FIGS. 1 and 2, a driven roller 71 is provided above the feed roller 55.
As shown in FIG. 4, both ends of a shaft 71 a of the driven roller 71 are rotatably supported by side bent pieces 72 a, 72 a of a roller holder 72. The support shafts 73, 73 are fixed to the side bent pieces 72a, 72a of the roller holder 72. The support shafts 73, 73 are rotatably supported on the inner surfaces of both side plates of the magazine holder 5. I have. In the portion shown in FIG. 4, the support shaft 73 passes through the elongated hole 13b formed in the selection drive lever 13, and is supported by the support hole 5e of the side plate of the magazine holder 5. As a result, the selection drive lever 13 that moves relatively to the magazine holder 5
Movement is not hindered.

In the portion shown in FIG.
A position control shaft 74 coaxial with the roller shaft 71a is provided at the tip of the second bent piece 72a, and is inserted into a control groove 13c formed in the selection drive lever 13. Since the control groove 13c is inclined with respect to the (a)-(b) directions, the selective drive lever 1
When the position 3 moves relatively in the directions (a)-(b), the position control shaft 74 moves in the control groove 13c, whereby the rotation angle of the roller holder 72 in the directions (g)-(h) is increased. Change. Selective drive lever 1 for magazine holder 5
3, the position control shaft 7 in the control groove 13c
4, the position of the position control shaft 74 at this time is indicated by (h) (i) (j) (k) (m).

FIG. 10 shows the case where the position control shaft 74 is at the position (i). At this time, the driven roller 71 is at a position for selecting the lower disk D in the magazine M. In FIGS. 11 and 12, the position control shaft 74 is at the positions (j) and (k), respectively. At this time, the driven roller 71 moves the middle disk D and the upper disk D in the magazine M respectively. This is the position to select. As shown in FIG. 3, an eject drive lever 77 is rotatably supported by a support shaft 78 at the bottom of the lower chassis 2. When the first drive lever 11 is further driven in the direction (A) while the magazine holder 5 is housed in the upper chassis 3 as shown in FIG. 1, the end (A) side of the first drive lever 11 As a result, the inclined portion 77a of the ejection drive lever 77 is pushed. At this time, the ejection drive lever 7
7 is driven in a clockwise direction, whereby an ejecting mechanism (not shown) operates, and the magazine M is removed from the magazine holder 5.
Is discharged in the direction (b). In the above-described structure, various operations are performed according to the movement position of the first drive lever 11 and the selective drive lever 13 that moves integrally with the first drive lever 11 in the directions (a) to (b).

Therefore, as shown in FIGS. 4 and 13A, a detecting device 80 for detecting the moving position of the selective driving lever 13 is provided. A hole 13d is formed in the upper part of the (a) side end of the selection drive lever 13, and this hole 13d is formed.
A support pin 83 provided at the end of the variable arm 82 is rotatably supported at d. The other end of the moving arm 82 is provided with an upward sliding pin 84 which is slidably inserted into a moving groove 81 formed in the upper chassis 3. The fluctuating groove 81 includes a parallel portion (p), an inclined portion (q),
When the vertical portion (r) is formed continuously and the selection drive lever 13 is moving on the (b) side,
The sliding pin 84 slides in the parallel portion (p). As the selection drive lever 13 moves from this position in the direction (a), the sliding pin 84 slides from the inclined portion (q) to the inside of the vertical portion (r).

Below the fluctuation arm 82, a detection plate 85 is provided.
Is provided. The bent pieces 85a and 85b bent upward from the detection plate 85 have guide grooves 86 linearly formed in the upper chassis 3 in the directions (a) and (b).
The detection plate 85 is slidably inserted into the a and 86b, whereby the detection plate 85 is slidably supported in the directions (a)-(b). The detection plate 85 is always urged in the direction (a) by the spring 87. (A)
An elongated hole 85c is formed in a direction orthogonal to the-(b) direction.
8 is inserted into the elongated hole 85c. Therefore, the detection plate 8
5 is driven in the directions (a)-(b) following the movement locus of the pin 88. The detection plate 85 is provided with a downward bent piece, and a holding groove 85d is formed in the bent piece. A sliding variable resistor 89 is fixed in the housing 1 as a sensing element, and a moving pin 89a for moving a movable contact of the variable resistor 89 is held in the holding groove 85d.

As shown in FIG. 13 (A), when the selection drive lever 13 moves in the directions (a)-(b), the moving arm 82 connected thereto moves to be provided on the moving arm 82. The sliding pin 84 slides in the variable groove 81. Here, when the sliding pin 84 is sliding in the parallel portion (p) of the variable groove 81, the selection drive lever 13 and the variable arm 8
2 moves in a substantially one-to-one relationship while maintaining the same positional relationship with each other.
5 also moves at approximately the same rate. Therefore, at this time, the moving amount of the moving pin 89a of the variable resistor 89 becomes large.

On the other hand, the sliding pin 84 is inclined (q).
When the movable arm 82 further slides in the vertical portion (r), the movable arm 82 rotates about the sliding pin 84 as a fulcrum, so that the detecting plate 85 driven by the connecting pin 88 (a)-(b) The amount of movement in the direction) decreases. Therefore, the moving amount of the moving pin 89a of the variable resistor 89 becomes small.
In this embodiment, the roller holder 72 is rotated by the control groove 13c of the selection drive lever 13, and the driven roller 71
When the operation of selecting a disk in the magazine M is performed by changing the height of the groove M, the sliding pin 84 slides in the parallel portion (p) of the variable groove 81. Therefore, the moving amount of the moving pin 89a of the variable resistor 89 at this time becomes large, and the disc selecting operation can be detected with high accuracy. In cases other than the above disk selection operation,
The sliding pin 84 moves in the inclined portion (q) and the vertical portion (r) in the variable groove 81 so that the selective driving lever 13 is moved.
The variable resistor 8 is larger than the moving distance in the directions (a)-(b).
The moving distance of the nine moving pins 89a is reduced. As a result, the position detection of the selection drive lever 13 that moves a relatively long distance in the directions (a) to (b) can be detected by the variable resistor 89 having a shorter stroke than this movement distance.

Next, the operation of the above disk device will be described. 7 to 12 are side views of the disk device for each operation mode, FIG. 13 (A) is a plan view showing the operation of the detection device 80, and FIG. 13 (B) shows a change in the resistance value of the variable resistor 89. FIG. (Stop or Playback Mode) FIGS. 1 and 7 show a stop mode and a playback mode. At this time, the first drive lever 11 is slightly (b) above the end position in the (b) direction.
In the forward position. Therefore, the control pin 17 provided on the connection arm 16 is located in the upper horizontal portion (a) of the crank groove 11c of the first drive lever 11, and the connection arm 16 is rotated slightly counterclockwise to lock the lock pin. 18
Are lock grooves 2 formed in the side plate 2a of the lower chassis 2.
c is fitted into the concave portion (d). Therefore, the second drive lever 14 is located at the end in the direction (a) and locked to the side plate 2a.

At this time, the swing lever 42 provided at the bottom of the lower chassis 2 shown in FIG. 3 is rotating clockwise, and the moving lever 39 is also moving in the direction (a). Then, the drive pin 41 provided on the moving lever 39 is separated from the restraining groove 37c of the clamp drive lever 37 provided on the unit chassis 30 of the reproduction unit 4, and the clamp drive lever 37 is actuated by the urging force of a spring (not shown). Moving in the direction. Therefore, the clamp arm 35
Is rotated clockwise about the support shafts 34, 34, and the clamper 36 is pressed against the turntable 31. The disc guide member 47 rotates counterclockwise around the support pin 47c, and the guide wire 48 is positioned along the upper surface of the unit chassis 30, and the arc-shaped restriction formed on the disc guide member 47 is formed. Face 47
a and 47b are positioned slightly apart from and parallel to the upper surface of the unit chassis 30. In the reproduction mode, the disc D is held by the turntable 31 and the clamper 36 in the state shown in FIGS.
Are clamped. The regulating surfaces 47a and 47b of the disc guide member 47 are opposed to each other with a gap formed on the outer periphery of the clamped disc D.

In the stop and playback modes shown in FIGS. 1 and 7, the magazine holder 5 moves in the direction (a), is placed above the clamp arm 35 of the playback unit 4, and is held by the magazine holder 5. Is the clamper 36
It is stored on the top. Further, the control groove 13c formed in the selection drive lever 13 integrated with the first drive lever 11 raises the position control shaft 74 fixed to the roller holder 72, and the position control shaft 74 is moved to the control groove 13c.
(M). Therefore, the driven roller 71 provided coaxially with the position control shaft 74 is in a state of being lifted to the uppermost position. On the other hand, as shown in FIG. 6, when the magazine holder 5 is housed in the housing 1, the bending piece 61 b of the biasing lever 61 is attached to the linear portion (f) of the upper edge 5 d of the side plate 5 c of the magazine holder 5. , The urging lever 6
Numeral 1 rotates around the support shaft 62 in the (（) direction. Therefore, the connecting lever 63 is pushed out in the direction (a),
The roller support plate 56 is rotated in the direction (C) with the support shafts 58a and 58b as fulcrums.

Therefore, as shown in FIGS. 1 and 7, the feed roller 55 is on standby at a position separated downward from the magazine holder 5. At this time, as shown in FIG. 1, the arms 53 d and 53 d of the shielding member 53 are pushed downward by the front edge 56 f of the notch 56 e of the roller support plate 56, and the shielding member 53 is pressed by the urging force of the spring 54. It is turned counterclockwise in opposition. Therefore, the upper edges 53b of the shielding member 53 are separated from the magazine M. A swing lever 42 provided on the bottom of the lower chassis 2
Is rotated clockwise, the unit restraining plate 51 is moved in the (b) direction by the drive pin 52, and the restraining pieces 51 e, 51 e are moved to the restraining grooves 3 of the unit chassis 30.
0e, 30e. Also, as shown in FIG.
The drive pin 41 is located at the center of the hole 37 b of the clamp drive lever 37, and is driven by the drive pin 41.
Is not bound. In the stop or playback mode, all the constraints of the unit chassis 30 are released in this way,
The regeneration unit 4 is elastically supported by an oil damper 6. Since the playback unit 4 is elastically supported in the playback mode, the vehicle body vibration of the vehicle when it is mounted on a vehicle does not affect the playback operation.

(Magazine Ejection Operation) When loading a magazine M into this disk device, the magazine M is inserted into the magazine holder 5 in the direction (a) in the state shown in FIG. The inserted magazine M is locked by a lock mechanism provided in the magazine holder 5. FIG. 8 shows a mode in which the magazine M locked in the magazine holder 5 is discharged. The pinion gear 12 is driven by the motor m, and the first drive lever 11 is slightly driven in the direction (a) from the position shown in FIG. At this time, the inclined portion 77a of the eject drive lever 77 is pushed by the (a) side end portion of the first drive lever 11, and the eject drive lever 77 is driven clockwise. The lock in the magazine holder 5 is released by the eject drive lever 77, and the magazine M is discharged from the magazine holder 5 in the direction (b).

(Disk Selection Operation) In the disk selection operation of returning the reproduced disk D to the magazine M and pulling out the desired disk D from the magazine M, FIG.
From the stop or play mode shown in
Moves in the direction (b) and proceeds to the selection start state shown in FIG. In this operation, first, the motor m is started from the state shown in FIG. 7 to drive the pinion gear 12, and the pinion gear 1
First drive lever 1 having a rack 11a that meshes with the first drive lever 1
1 moves in the (b) direction. In the first phase of this move,
The control pin 17 provided on the connecting arm 16 enters the inclined portion (b) of the crank groove 11c, and the connecting arm 16 is rotated slightly clockwise. As a result, the lock pin 18 provided on the connecting arm 16 comes out of the concave portion (d) of the lock groove 2c of the side plate 2a, and the side plate 2 of the second drive lever 14
The lock on a is released. Further, since the control pin 17 is held in the inclined portion (b) of the crank groove 11c, the first drive lever 11 and the second drive lever 14 are connected to each other via the connection arm 16 thereafter. The second drive lever 14 moves in the (b) direction together with the first drive lever 11.

When the second drive lever 14 moves in the direction (b), the gear 2 is moved by the rack 14a of the second drive lever 14.
One small-diameter gear 21a is driven in the counterclockwise direction, and further, the gear 23 meshing with the large-diameter gear 21b integrated with the small-diameter gear 21a is driven in the clockwise direction. Since the gear 23 meshes with the rack teeth 24a of the rack plate 24 shown in FIG. 4, the rack plate 24 and the magazine holder 5 fixed integrally therewith move in the (b) direction. When the second drive lever 14 moves to the position shown in FIG.
At the end of the lock groove 2c in the (b) direction. When the first drive lever 11 further moves in the (b) direction, the control pin 17 is lowered by the inclined portion (b) of the crank groove 11c to reach the lower horizontal portion (c). Therefore, the connecting arm 16 is slightly rotated clockwise, the lock pin 18 enters the concave portion (e) at the end of the lock groove 2c, and the second drive lever 14 is locked to the side plate 2a. Therefore, the second drive lever 14 and the gears 21 and 23
The rack plate 24 and the magazine holder 5 fixed integrally therewith stop at the position shown in FIG.

While the second drive lever 14 moves in the (B) direction from the position shown in FIG. 7 to the position shown in FIG. 9, the swing lever 42 is deflected by the connection groove 14b formed in the second drive lever 14. The swing lever 42 is rotated clockwise, and the moving lever 39 connected to the swing lever 42 is moved in the (b) direction. Therefore, the driving pin 41 provided on the moving lever 39 is connected to the clamp driving lever 3 of the reproducing unit 4.
7, the clamp drive lever 37 is fitted.
Is moved in the direction (b). As a result, the clamp arm 35 connected to the clamp drive lever 37 via the pin 38 rotates counterclockwise about the support shafts 34, 34, and the clamper 36 is separated from the turntable 31. Therefore, when the disk D is clamped, the clamp of the disk D is released. When the clamp arm 35 rotates, the disk guide member 47 is rotated in the lifting direction with the support pin 47c as a fulcrum. Then, the guide wire 48 connected to the disc guide member 47 is lifted with the support hole 30c of the unit chassis 30 as a fulcrum, as shown in FIG. Due to the elevation of the guide wire 48, the (a) end of the unclamped disk D is lifted, and the disk D is brought into a position where it can be easily returned into the magazine M.

At this time, as shown in FIG.
Fits into the restraining groove 37c of the clamp drive lever 37,
The unit chassis 30 is restrained. On the other hand, when the swing lever 42 shown in FIG. 3 is rotated in the counterclockwise direction, the drive pin 52 provided on the swing lever 42 drives the unit restraining plate 51 in the direction (A). The formed restricting pieces 51e, 51e
0 are engaged with the constraint grooves 30e. The playback unit 4 is restrained and locked by the unit restraining plate 51 and the drive pin 41. The playback unit that is not playing the disc D is thus restrained and locked, so that the delivery operation of the disc D between the magazine M and the playback unit 4 is facilitated.

While the second drive lever 14 moves together with the first drive lever 11 from the position shown in FIG. 7 to the position shown in FIG. 9, the rack 14a of the second drive lever 14 rotates the small-diameter gear 21a, and is integrated therewith. Since the rack plate 24 is moved in the (B) direction via the large-diameter gear 21b and the gear 23, the moving force is increased, and the moving distance of the second drive lever 14 in the (B) direction is calculated. Also, the amount of movement of the magazine holder 5 integrated with the rack plate 24 in the (b) direction is longer. Further, since the selection drive lever 13 moves in the (b) direction integrally with the first drive lever 11, the moving distance of the magazine holder 5 is longer than that of the selection drive lever 13 from FIG. 7 to FIG. Become. Therefore, the roller holder 72 supported by the magazine holder 5 is
7 to 9, the position control shaft 74 provided on the roller holder 72 moves in the control groove 13c of the selection drive lever 13 in the direction (b). Relatively slide in the direction. Therefore, the position control shaft 74 descends along the control groove 13c during the transition from the state of FIG. 7 to the state of FIG. 9, and in the state of FIG.
(H). Accordingly, the driven roller 71 located at the upper position in the state of FIG. 7 descends to the lowermost stage in the state of FIG.

While the magazine holder 5 advances from the position shown in FIG. 7 in the direction (B), the bent piece 61b of the urging lever 61 shown in FIG. The roller support plate 56 is kept rotating in the direction (C) to slide on the linear portion (f).
5 is maintained at the lowered position as shown in FIG. Then, immediately before the magazine holder 5 advances to the position shown in FIG.
The bent piece 61b reaches the inclined portion (g) of the upper edge 5d of the side plate of the magazine holder 5. At this time, the spring 6
The urging force of 4 causes the urging lever 61 to rotate in the (E) direction and the connecting lever 63 to be pulled in the (A) direction, so that the roller support plate 56 rotates in the (D) direction. The feed roller 55 supported by the roller support plate 56 is
The urging force of the spring 64 causes the driven roller 71 at the position shown in FIG. When the disk D is clamped by the reproducing unit 4, the (b) side end of the unclamped disk D is held between the feed roller 55 and the driven roller 71.

As described above, when the magazine holder 5 is moving forward in the direction (b) from the position shown in FIG.
6 remains rotated in the direction (c), the front edge 56f of the notch 56e of the roller support plate 56 causes the shielding member 5
3 maintains the posture pushed down in the counterclockwise direction (FIG. 1).
reference). Therefore, while the magazine holder 5 moves, the upper edges 53b, 53b of the shielding member 53 are separated from the bottom surface of the magazine holder 5 without sliding. Therefore, the shielding member 5
No sliding resistance occurs between the magazine holder 3 and the magazine holder 5,
Also, there is no abrasion of the sliding portion. And magazine holder 5
When the roller has moved to the state shown in FIG. 9, the roller support plate 56 rotates in the direction (d) as shown in FIG. The upper edge 53b of the shielding member 53,
53b resiliently contacts the lower surface of the end of the magazine M on the side (a), and the gap below the magazine M is shielded. Therefore, in the subsequent magazine selection operation, the disc D returned from the reproduction unit 4 into the magazine M does not accidentally enter below the magazine M.

In the state shown in FIG. 9, the lock pin 18 provided on the connecting arm 16 is fitted into the concave portion (e) of the lock groove 2c of the side plate 2a, and the second drive lever 14 is locked. Drive lever 14, gear 21 and gear 23
The rack plate 24 and the magazine holder 5 meshing with each other remain stopped at the position shown in FIG. Therefore, when the first drive lever 11 and the selective drive lever 13 integral therewith are further driven in the direction (b) by the motor m from the state of FIG. 9, the position control of the roller holder 72 supported by the stopped magazine holder 5 is performed. The shaft 74 slides in the control groove 13c of the selection drive lever 13, and the roller holder 72 is rotated around the support shaft 73 in accordance with the shape of the control groove 13c, and the height position of the driven roller 71 is changed. Can be For example, as shown in FIG. 10, the position control shaft 74 is
When the motor m is stopped and the first drive lever 11 and the selection drive lever 13 are stopped when the motor m is held at the step position (i), the driven roller 71 is pressed against the driven roller 71 by the force of the spring 64. The feed roller 55 is a magazine M
Opposes the disk D stored in the lower part of the inside.

Further, the motor m is not stopped in the state shown in FIG.
When the motor m is stopped at the position shown in FIG.
The second position control shaft 74 is held at the position (j) of the control groove 13c. At this time, the driven roller 71 and the feed roller 55 pressed against the driven roller 71 are placed in the middle disk D in the magazine M.
Oppose. Similarly, when the first drive lever 11 and the selection drive lever 13 are advanced to the positions shown in FIG. 12 and stopped, the position control shaft 74 is held at the position (k) of the control groove 13c. At this time, the driven roller 71 and the feed roller 55 return the disk to the top of the magazine M, and enter a mode in which the top disk can be pulled out. That is, after the magazine holder 5 stops at the position shown in FIG. 9, the selection drive lever 13 is further advanced in the (b) direction and stopped at any of the positions shown in FIGS. The feed roller 55 and the driven roller 71 reach one of the disk selection positions in the magazine M.

Here, when the disc D is clamped on the reproducing unit 4 at the time when the magazine holder 5 starts to advance in the direction (b) from the state shown in FIG. 7, the second drive lever 14 The disc is released from the clamping by the movement of the disk D, and the (a) side end of the disk D is lifted by the guide wire 48. When the state shown in FIG. 9 is reached, the (b) side end of the disk D is fed. It is lifted by the roller 55 and is nipped between the feed roller 55 and the driven roller 71. Therefore, in any of the selection modes shown in FIGS. 10, 11, and 12, when the feed roller 55 is driven clockwise by the roller driving motor, the unclamped disk D is stored in any of the magazines M. Sent to the position.

Any disk D in the magazine M
Is pulled out, the feed roller 55 is driven counterclockwise in the selection mode shown in FIG. 10, FIG. 11, or FIG. At this time, the selected disc D of the magazine M is slightly protruded from the inside of the magazine M in the direction (a) by a pushing mechanism (not shown). Then, the disk D is sandwiched between the feed roller 55 and the driven roller 71, and the feed roller 55
Is rotated counterclockwise, the disc D is pulled out into the reproducing unit 4. Thereafter, the first drive lever 11 is driven in the direction (a) by the power of the motor m, and the operation shown in FIGS. And the magazine M is stored at a position above the clamper 36.

(Operation Detection) Next, a detection operation by the detection device 80 will be described with reference to FIGS. As described above, in the drive mechanism 10, the first drive lever 11 and the selective drive lever 13 integrated therewith are driven in the directions (a) to (b) by the single motor m. 8 is from the magazine eject mode moved in the most (B) direction shown in FIG. 8 to the uppermost disk selection mode moved in the most (B) direction shown in FIG. In the detection device 80, the movement position of the selection drive lever 13 is detected by a change in the resistance value of one slide-type variable resistor 89, whereby the switching to the various modes can be recognized. .

In the detection device 80, the selective driving lever 1
As 3 moves in the directions (a)-(b), the sliding pin 84 provided on the moving arm 82 slides in the moving groove 81. The selection start state shown in FIG. 9, FIGS. 10 to 1
The sliding pin 84 moves in the parallel portion (p) of the variable groove 81 while the selection drive lever 13 moves to switch the lower, middle, and upper disc selection states shown in FIG.
Therefore, the detection plate 85 driven by the pin 88 provided on the moving arm 82 is substantially one-to-one with the selective drive lever 13.
Move in the directions of (a)-(b). Therefore, during this time, the moving distance of the moving pin 89a of the variable resistor 89 becomes longer, and as shown in FIG. 13B, almost half or more of the stroke of the variable resistor 89 is used during this time. Therefore, as shown by R1 to R4, the amount of change in the resistance value in the switching state shown in FIGS. 9 to 12 becomes large, and the operation of selecting a disk in the magazine M is performed without error based on highly accurate detection. become.

Also, during the selection mode shown in FIG. 9 from the ejection mode shown in FIG. 8 and the stop and reproduction modes shown in FIG. 9, the sliding pin 84 moves between the inclined portion (q) and the vertical portion (r) of the variable groove 81. , And the moving arm 82 rotates about the sliding pin 84 as a fulcrum, so that the moving distance of the detection plate 85 driven by the pin 88 is reduced. In FIG. 13B,
The resistance value of the variable resistor 89 in the eject mode shown in FIG. 8 is indicated by R6, and the resistance value in the stop and reproduction modes is indicated by R5. That is, in an operation that does not require detection between R5 and R4, the moving pin 89a
Movement amount becomes small. Further, by performing the highly accurate detection operation of the variable resistor 89, it is necessary to provide separate detection means for detecting the height position of the driven roller 71, detecting the clamp and release of the disk, and detecting the eject mode. Disappears. In the disk device in which the detection device according to the present invention is used, the magazine M is a housing 1
The magazine M is not limited to the one that moves inside, and the magazine M may be stationary inside the housing. Further, the detection device according to the present invention can be used for various devices other than the disk device. Further, the sensing element is not limited to a variable resistor, but may be an optical or magnetic linear sensor.

[0054]

According to the first aspect of the present invention, even if the moving distance of the object to be detected is long, a detecting element having a shorter stroke can be used. Moreover, if a detection requiring accuracy is performed while the moving member is moving along the parallel portion of the moving guide portion, the detection output at this time is a high-precision one that is related to the movement of the detected object on a one-to-one basis. become.

According to the second aspect of the present invention, the detection of the moving position of the disk selecting member is performed with a high accuracy of one to one with respect to the moving amount of the driving member. In addition, it becomes possible to use a detecting element having a shorter stroke than the moving amount of the driving member.

[Brief description of the drawings]

FIG. 1 is a side view of a disk device showing a state where a disk is clamped to a reproducing unit;

FIG. 2 is a side view of a disk device showing a disk selecting operation in a magazine;

FIG. 3 is an exploded perspective view showing members provided on a lower chassis of the housing;

FIG. 4 is an exploded perspective view showing members provided on an upper chassis of the housing;

FIG. 5 is an exploded perspective view showing a structure of a reproduction unit in a housing;

FIG. 6 is a perspective view showing the side of the housing from the opposite side of FIGS. 3 and 4,

FIG. 7 is a side view showing a stop mode and a play mode;

FIG. 8 is a side view showing the eject mode of the magazine;

FIG. 9 is a side view showing a disk selection start state;

FIG. 10 is a side view showing a lower disk selection mode in the magazine;

FIG. 11 is a side view showing a middle disk selection mode in the magazine;

FIG. 12 is a side view showing the upper disk selection mode in the magazine;

FIG. 13A is a plan view showing the operation of the detection device.
(B) is a diagram showing a detection output of the detection device,

FIG. 14 is a side view of a conventional disk selection type disk device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 2 Lower chassis 2c Lock groove 3 Upper chassis 4 Playback unit 5 Magazine holder 10 Drive mechanism 11 First drive lever 11a Rack 11c Crank groove 12 Pinion gear 13 Selection drive lever 13c Control groove 14 Second drive lever 14a Rack 16 Connecting arm 17 Control Pin 18 Lock Pin 21 Gear 23 Gear 24 Rack Plate 24a Rack Teeth 30 Unit Chassis 31 Turntable 32 Optical Head 35 Clamp Arm 36 Clamper 37 Clamp Drive Lever 39 Movement Lever 41 Drive Pin 42 Swing Lever 47 Disk Guide 47a , 47b regulating surface 48 guide wire 53 shielding member 55 feed roller (disk selecting member) 56 roller support plate 61 biasing lever 63 connecting lever 71 driven roller (disk selecting portion) Material) 72 Roller holder 74 Position control shaft 80 Detecting device 81 Variable groove (p) Parallel portion 82 Variable arm 85 Detection plate 89 Variable resistor (detection element) 89a Moving pin

Claims (2)

(57) [Claims] An object to be detected that moves linearly; a sensing element whose detection output changes in response to a linear movement input; a fluctuation guide portion having a parallel portion along a direction in which the detected object moves and a portion bent from the parallel portion; A moving member that moves along the fluctuation guide portion and moves together with the detected object;
A detection device wherein a detection input section of the detection element is driven in accordance with the movement of the variable member. 2. A disk accommodating portion for accommodating a plurality of disks, a driving member which moves linearly, a disk driving portion for performing a clamping and unclamping operation of the disk by a driving force of the driving member, A disc selecting member that is moved to a position for selecting any one of the discs by a moving force, wherein the driving member is a detection target of the detecting device according to claim 1, A disk device using a detecting device, wherein the variable member moves along a parallel portion of the variable guide portion when the disk selecting member is moved by the driving member.