JPH01227255A - Disk player - Google Patents

Abstract

PURPOSE:To facilitate the engagement of the periphery of a disk with a lifter in simple constitution and to improve the operability of the subject player by providing an abutting part for regulating the lifter not to be sunk down by abutting a lower surface of the lifter when a tray is in a drawing position. CONSTITUTION:The tray 26 is freely slidably supported by four supporting members 24 formed on a chassis. Then, a protruding line is formed on the members 24 disposed on the forward side at their side surfaces respectively which are opposite to each other. The protruding line is opposite to a turning lever 33 with a slight gap during the movement of the tray 26 from the drawing position until just prior to a carrying-in completion position. Consequently, the lifter 29 is pressed so as to turn the lever 33, but the lever 33 is abutted against the protruding line to be regulated in its turn, so that the lifter 29 is locked up in its protruding position until completion of carrying the tray 26 in, so as to be regulated in its sinkage. By this method, the periphery of the disk can easily be engaged with the lifter in simple constitution, and the operability of the player is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a disc player in which a lifter for raising and lowering the disc is retractably disposed on a tray for transporting discs, and particularly relates to This invention relates to a lifter in which an engaging portion that engages with the peripheral edge of the disk to position the disk is formed.

(B) Prior Art In recent years, with the spread of compact discs, a disc (diameter 8cm111), called a CD single, which is smaller in diameter than a normal diameter disc (12cm in diameter) has been standardized. Therefore, it is necessary for the player to have a means to mount even such a small-diameter disc into the player.

As an example of such a means, the applicant proposed the technique disclosed in the previously filed Utility Model Application No. 63-2371. That is, the tray for transporting the disk is formed with a groove that engages with a predetermined peripheral edge of the small-diameter disk, and the top surface of the lifter disposed on the tray is further provided with an inclined cut that engages with the other peripheral edge of the disk. A notch is formed, and the small diameter disk is positioned with respect to the tray in an inclined manner by these grooves and notches.

However, in the case of such a device, if the lifter is in a retractable state when the disk is attached or removed, the user may feel uncomfortable when the small diameter disk is engaged with the notch in the lifter.

On the other hand, unless a lifter elevating device such as that disclosed in JP-A-57-88560 is used, the lifter will not sink in when attaching or removing the disk, but in such a case, the structure of the lifter elevating device The problem was that it was complicated.

(c) Problems to be Solved by the Invention An object of the present invention is to provide a lifter elevating device that can restrict the lifter from sinking into the lifter with a simple configuration.

(d) Means for Solving the Problems In order to solve the above problems, the present invention has a structure in which an abutting portion is provided which abuts the lower surface of the lifter and restricts the lifter from retracting when the tray is in the drawn-out position. did.

(e) When the working tray is in the pulled-out position, the contact part contacts the lower surface of the lifter, so even if the lifter is pressed down, it will not be recessed.Afterwards, when the tray is carried in, Because the positional relationship between the lifter and the abutting part is shifted, the abutting part does not face the lower surface of the lifter, and therefore the lifter is damaged by external action.
You can immerse yourself freely.

Kube) Example An embodiment of the present invention will be described below.

(2) Overall configuration (11) All the mechanical parts of the pickup mechanism are mounted on the chassis (100). In Figures 1 to 5, pick-up (
1) is slidably supported on the saucer (100) by a sliding shaft (2) (2>).

Here, the shaft (2) <2> is connected to two sets of mounting portions (3) (3) disposed opposite to each other inside the chassis (100).
(3) Each end is fixed to (3). In addition, the pickup 1) is supported by the shafts (2), (2) inserted into the through holes (4) (4), (4) drilled in the pickup 1).
This is done by penetrating the

Furthermore, a set of rack gears (5 gears (6)) is attached to the pickup (1) for the purpose of transmitting driving force.Actually, a rack gear (5) (hereinafter referred to as the first rack gear) is screwed onto the pickup (1). The first rack gear (5)
A rack gear (6) (hereinafter referred to as the second rack gear) is slidably attached to the rack gear. The second rack gear (6) is installed by attaching the protrusion (5a) formed on the top surface of the first rack gear (5).
) (5a) has a through hole formed in the second rack gear (6).
6a) This is done by engaging (6a). That is, the moeki projections (5a) (5a) have locking parts (
5b) (5b) is formed, and this locking part (5b
) (5b) comes into sliding contact with the upper surface of the second rack gear (6), so that the second rack gear (6) is connected to the first rack gear (5).
It becomes possible to slide along the through hole (6a) C6a) without falling off. Also, these two rank gears (5
) and (6), a spring (7) is inserted between them to urge the second rack gear (6) to the left in FIG. 1 with respect to the first rack gear (5). In addition, the two rack gears arranged in this way <5)
(6') uses the force exerted by the spring (7) to sandwich the teeth of the gear that meshes with them, thereby improving the backlash that occurs between the rack gear and the gear, and furthermore, the driving force from the motor described later is It also contributes to transmission switching. Furthermore, a trigger gear (6b) is formed at the end of the second rack gear (6).

(b) Disc drive mechanism Near the pickup (1) is a disc-shaped turntable (
8) is provided. To install the turntable (8), screw the spindle motor (9) onto the shaft (100) from the bottom of the chassis (100), and then install the turntable (8).
This is accomplished by attaching the motor (9) to the spindle shaft of the spindle motor (9).

(c) The clamp mechanism (10) is a clamper, and one end has a rotation shaft (11) (11
), and a press plate (not shown) for press-fitting the disk to the turntable (8) is rotatably mounted on the lower surface of the rotating end. Further, a boss (12) is formed on the lower surface of the clamper (10) from the rotation axis position, and this boss (12)
) is formed with a protrusion (13) at its tip. Furthermore, flanges (14) (14) are formed on the sides of the clubber (10), respectively, and pins (15) <15) protrude from the lower surfaces of the flanges (14) (14). It is set up. In addition, this pin (IS) (15) is attached to the clamper (1) as described later.
0) When rotating, it acts to raise and lower a disc elevating member (lifter) disposed on a tray for transporting discs.

Such a clamper (10) has its rotation axis (11) (11
) formed on the chassis (100) is a boss (16) (
The chassis (10
0) so that it can rotate freely. That is, the boss (16
) (16) Bearings (17) (18) are formed at the upper end, and after storing the rotation shaft (11011) of the clamper (10) in these bearings (17) (18), the side with the open upper surface The clamper (10) is attached by screwing the bearing (1g) and the surface.

(19) is a drive lever that drives the clamper (10), and after the circular through hole (21) is fitted into the boss (20) provided on the chassis (100), the upper surface of the boss (20) is screwed. By turning it upward, it is rotatably attached to the chassis (100). The drive lever (19) is formed with an oblong slot (21) and further has an end (19c).
A spring (23) is stretched between the upper protrusion (22) and the upper protrusion (22), thereby biasing the upper protrusion (22) counterclockwise. Here, a protrusion (13>) formed on the clamper (10) is fitted into the slot (21) of the drive lever (19).Therefore, normally the clamper (10) is The end edge on the crimp plate side from the drive lever (19) is connected to the turntable (8
), but as will be described later, the end edge (19e) of the drive lever (19) comes into contact with the cam gear and its rotation is controlled, so the rotation is restricted by this cam gear. Not done.

(d) Disk transport mechanism The tray for transporting the disc is supported slidably in the - direction by support members (24) (24) (24) (24) formed on the chassis (100). Such a support member (
24) has a protrusion (24a) that regulates the horizontal direction of the tray.
and a hook portion (24b) for regulating the downward direction are formed, respectively. Furthermore, two support members (2
4) (24) has a protrusion (25) on the opposite side.
(25) is formed. In addition, such a protrusion (25)
(25) is to prevent the lifter from being lowered by external force when the tray is in the drawn-out position.

FIG. 2 is a diagram showing the structure of the tray. Tray (26)
has a circular recess (
27) is completely formed. This recess 27) has a diameter slightly larger than the diameter of the disk. Also, this concave 1W (27
) is formed with an opening (28) to allow movement of the turntable (8) and pickup (1), and also has a lifter (29) (29) (29) (2) for raising and lowering the disc.
9) protruding through hole (30) (30) (30) (30)
is formed. The disc can be completely positioned in the recess (27) by being stored in the recess (27), and the lifter (29) (29) (29) (29) can be moved up and down by controlling the lifter (29) (29) (29) (29). It is moved up and down within the horizontal position.

Incidentally, such a tray (26) is designed to be able to position and mount a disk having a smaller diameter than a normal disk. That is, the oil pressure of the recess (27) is formed with an inclined groove (31) that engages with the periphery of the small-diameter disk, and the upper surface of the two rear lifters among the four lifters is provided with the small-diameter disk. An inclined notch (32
) (32) are formed. Therefore, the small-diameter disk is positioned and installed in the recess (27) in an inclined state by having its peripheral edge engage with the inclined grooves (31), (32), and (32). The details of the positioning and conveying mechanism for such a small-diameter disk are disclosed in the earlier application filed in 1983.
No. 3-2371.

The above-mentioned lifters (29) (29) (29) (29) have two lifters arranged in the front-rear direction that are fixed to the rotating rods (33) and (33), respectively, in pairs. And these (r!1 moving rods (33), (33) are respectively rotating shafts (3
3a) (33g) is the axis, and the shaft is loaded on the bottom surface of the °C loop (26). Furthermore, the rotating rods (33) and (33) are protrusions (
34), a spring (
(not shown) is inserted into the lifter (29).
(29), (29) (29) is the through hole (3) of the recess (27).
0) (30), (30) (30) so as to protrude upward (4 force). Therefore, the lifters (29) (29), (
29) (29) is a through hole (30) (30), (30) (3
0) into the recess 27). In addition, the rotating rod (3
3), (33) are formed with pins (35) (35),
The upper surface is viewed from through holes (36) (36) formed in the tray (26).

The through holes (36) (36) engage with the pins (15) (15) on the lower surface of the clamper (10) by rotation of the clamper (10) when the tray (26) is at the loading completion position. Therefore, when the clamper (10) rotates in the direction of the turntable (8), the bottles (35) (35) facing outside through the through holes (36)
The pin <15) (15) disposed at 0) can be pressed and traced. At this time, the spring force that biases the clamper (10) is thicker than the spring force that biases the rotation rod (33), so the rotation rods (33) and (33) are attached to the turntable of the clamper (10). In response to the rotation in the direction (8), the lifter (29) (29) is rotated against the bias of the spring.
, (29) (29) are lowered. Therefore, the disk is
After being carried into the player by the tray (26), the clamper (10) (7) is moved into the recess (27).
It moves up and down inside the turntable (8) and is placed on or separated from the turntable (8).

The tray (26) configured in this manner is further formed with protrusions (37) (37) at the lower part of both sides, and the protrusions (37)
7) (37) is the support member (24) (24) (
24) The projection of (24) <24a)... and the hook part (24b
)... By being engaged with the support member (24) (
24) (24) It is supported slidably in the front and rear direction by (24). Further, a rack gear (38>) is formed on the negative side of the tray (26), and is driven in the front-rear direction by receiving a driving force from a gear section to be described later.

By the way, a small-diameter disc with a small diameter can be attached to such a tray (26) as described above, but when it is placed in the 8th position, the circumference of the small-diameter disc is inserted into the notch (
32) Since these lifters must be engaged with (32), it is preferable that these lifters be fixed when installing a small diameter disc. This embodiment focuses on this point,
As mentioned above, the front support member (24) <24) has a protrusion (
25), (25) have been formed), tray (2
6> is pulled out from the player until just before the loading completion position, the protrusions 25) and (25) face the rotation rods (33) and (33) with a small gap therebetween. Therefore, when the lifters (29), (29), (29), (29) are pressed down and the pivoting rods 33), (33) are about to rotate, these pivoting rods (33), (33>) Article (25)
The lifter (25) has an audience with the lifter (25), and its rotation is controlled.
9)(29), (29)(29) are locked in the protruding position until the loading of the tray (26) is completed.

(e) Disk size determination mechanism Disk size is determined using the detection lever (39) and switch (4).
0) i,: Therefore, it is detected. Detection lever (39) i:
A protrusion (41) that comes into contact with the peripheral edge of the hadisk, an operation part (42) that operates the switch (40), a through hole (43) that serves as a rotation axis, and a hook part (44) that locks one end of the spring. )and,
A contact portion (45) that comes into contact with a cam gear, which will be described later, is formed. Such a detection lever (39) is connected to the chassis (10
The through hole (42) is inserted into the shaft (46) implanted in the chassis (100), so that the shaft (46) is rotatably attached to the chassis (100). Then, the hook part (44) and the chassis (1
A spring 48) is stretched between the hook portion (47) on the 00) side and is biased to rotate counterclockwise. However, since the contact portion (45) contacts the cam gear, the detection lever (39) is restricted from rotating, and thereafter is displaced to the disk detection position rotated in the biasing direction by the rotation of the cam gear.

Further, a switch (40) is disposed in the chassis (100) near the operating section (42) of the detection lever (39), and when the detection lever (39) is displaced to the disk detection position, the operating section (42) ONareru by.

The detection lever (39) is arranged such that the protrusion (41) faces the side surface of the tray (26) with a slight gap therebetween. As the cam gear rotates after the disk clamping operation is completed, the protrusion <41) is displaced to the disk detection position by the bias of the spring (48). At this time, as shown in Fig. 6, if the clamped disk is of a normal size, the detection lever (39) is in the middle of its rotational displacement when its protrusion (41) touches the disk (D+>periphery). The switch (40) is not turned on because the rotation is restricted by the contact.On the other hand, if the clamped disk is a small diameter disk (D,) as shown in Fig. 7, the detection lever (39) Since the switch (41) does not come into contact with the disk periphery, the switch (41) is rotated to the disk detection position, and as described above, the switch (41) is rotated to the disk detection position.
0) is turned on.

Therefore, the size of the disk can be detected based on the state of the switch at this time.

(r) The shape of the control gear mechanism cam gear (49) is shown in FIG. 8, in which (a) is an external perspective view, (b) is a top view, and (c) is a bottom view.
As shown in the figure, the cam gear (49) has a gear part (50) on the outer periphery.
is formed. The gear portion (50) has a toothless portion (50a) formed in a predetermined region in the upper half, and a toothless portion (50b) also formed in a predetermined m* region in the lower half.

In addition, there are two concentric protrusions (51) (52) on its upper surface.
) is formed, and a cam portion (51g) whose diameter gradually becomes smaller is formed on the inner first protrusion (51ω).

Further, the second protrusion (52) is formed in two stages with different outer diameters, and a gear part (53a) is formed in a predetermined arc part at the lower part (53) with a large inner and outer diameter. , top (
54) is formed with a cam portion (54a) whose diameter gradually becomes smaller. Furthermore, a protrusion (55) is formed on the bottom surface of the cam gear (49) at a circumferential position over the region where the toothless portion (50b) is formed, and a protrusion (56) is further formed along the radial direction. It's broken.

The protrusion (56) operates a switch at the rotational position of the cam gear (49) at the tray unloading completion position to indicate completion of tray unloading.

Next, the configuration of the control gear mechanism will be explained.

In FIGS. 3 and 4, the driving force from the motor (57) is applied to a pulley (58) pivotally connected to the rotating shaft of the motor (57).
), 1st gear (59), 2nd gear (60), 3rd gear (
61) and is transmitted to the cam gear (49) via the fourth gear (62). That is, the pulley (58) is the first gear (59)
The small diameter portion of the first gear (59) meshes with the large diameter portion of the second gear (60), and the second gear (60) also meshes with the large diameter portion of the second gear (60).
The large diameter part of 60) meshes with the large diameter part of the third gear (61),
The small diameter part of the third gear (61) and the upper gear (62d) of the fourth gear (62) mesh, and the lower gear (62b) of the fourth gear (62) and the gear of the cup gear (49) Department (50)
The upper halves of the two mesh together. In addition, the small diameter part (
60a) is the thick gear (5) of the pickup mechanism described above.
) (6) and drives the pickup (1).

As a result, the cam gear (49) receives the driving force from the motor (S7) and can be rotated, but the rotation of the cam gear (49) progresses and the toothless portion (50a) of the gear portion (50) shifts to the fourth gear. (62
>, the fourth gear (62) will idle, so
After that, even if the motor (57) operates, the cam gear (49) will not rotate, and the gear portion (50) of the cam gear (49) will not rotate.
The lower gear (63a) of the fifth gear (63) that drives the tray meshes with the lower half of the tray, and the upper gear claw 3b) of the fifth gear (63) meshes with the rack gear (38) of the tray (26). mesh. Therefore, the driving force of the motor (57) transmitted to the cam gear (49) by the gear group described above is transmitted to the tray (26) via the fifth gear (63)! I can do it. However, as described above, since the toothless part (50b) is formed in the lower half of the gear part (50) of the cam gear (49), the cam gear (49) rotates and the toothless part (50b) is formed in the lower half of the gear part (50) of the cam gear (49).
50b) is opposed to the lower gear <63a) of the fifth gear (63), the driving force from the motor (57) is not transmitted to the fifth gear (63), so the tray (26> is not driven). .

Further, a trigger member (64) is rotatably supported (65) on the chassis (100).
) hook (66) and Nyasi (100) hook (66)
By tensioning a spring (67) between them, rotation 1- is forced in the counterclockwise direction. Such trigger member (64)
A fan-shaped flange (68) is formed on the flange (68).
A gear (69) is formed along the periphery. Furthermore, the trigger member (64) has a trigger gear (70) on the upper side.
is completely formed. The trigger member (64) is biased by the spring (67) as described above, and the flange (68) comes into contact with the lower part (53) of the second protrusion (52) of the cam gear (49). Therefore, its rotation is regulated. Also,
When the cam gear (49) is at a predetermined rotational position, the gear part (53a) of the lower part (53) of the second protrusion (52) is connected to the collar part (6).
8), this gear part (53a) and the collar part (68
) meshes with the gear (69), so the trigger member (64) rotates in conjunction with the rotation of the cam gear (49>).The trigger gear (70) of the trigger member (64) is the second rack gear of the pickup mechanism. (6) Trigger gear (6)
b) meshes. The trigger member (64) is rotationally controlled by the cam gear (49), and in response to this, the pickup (1) is controlled and the cam gear (49) is controlled by the movement of the pickup (1).

A drive lever (1) that drives the aforementioned clamper (10)
9) and a detection lever (39) for disc size determination.
) is connected to the first protrusion (51) of the cam gear (49), respectively.
and comes into contact with the outer periphery of the upper part (54) of the second protrusion (52).

These are the first
The rotation is controlled by the cam portions (51a) and (54a) of the second protrusions (51) and (52).

(g) Damage prevention mechanism When the motor (57) mentioned above is driven, if the tray is forcibly stopped during transport, the motor (57)
57) and the transmission gear, the motor (57)
Alternatively, the transmission gear may be damaged. In this embodiment, in order to prevent such damage, the gear portion (5) of the cam gear (49) is
The fourth gear (62) that meshes with 0) has been devised.

Its configuration is shown in FIG.
), then insert the upper surface of the upper gear (62a) into the leaf spring (
72) to construct a breakage relief mechanism. The upper gear (62a) and the lower gear (62b)
are gear parts (
73) (73) and the engaging part (74) formed on the joint surface
(74) and through holes (75) (75) formed in the central axis.
). Furthermore, the engaging portion (74) has a protrusion (
74a), a recessed portion (74b), and an inclined portion (74c) connecting these. Thus, as described above, the upper gear (62a) and the lower gear (62b) are connected to the shaft (71).
When attached to the other engaging part (74), the protruding part (74a) and the recessed part (74b) of one engaging part (74) (7)
) is engaged with the recess (74b) and protrusion (74a) of the upper gear (62a), thereby connecting the upper gear (62a) and the lower gear (62b).

To explain the operation of such a damage prevention mechanism, for example, when the tray (26) is conveyed as described above, if the conveyance of the tray (26) is blocked by the player's internal arrangement II, etc.,
The lower gear (62b) of the fourth gear (62) is locked through the fifth gear (63) and the cam gear (49). When the lower gear (62b) is locked in this way, the lower gear (62b) is locked.
2b) and the upper gear (62a).
) (74), the resistance force acting between the inclined parts (74c) and (740) in the rotational direction of these gears increases, and the upper gear (6
2a) resists the bias of the leaf spring (72) and lower gear (62)
b) is displaced upward along the inclined portion (74c), and the engagement of the respective retaining portions (74) (74) is temporarily released.

Therefore, even though the lower gear (62b) is locked, the upper gear (62m) is rotated by being slightly displaced upward. And after that, the upper gear <62a
) rotates slightly, the engaging portions (74) (74) of the upper gear (62a) and lower gear (62b) rotate by 1 in the circumferential direction.
The upper gear (62a) and the lower gear (62b) are engaged again at the shifted position.

In this way, the first part gear (62a) rotates only itself while repeating connection and disconnection with the F part gear (62b). Therefore, even if the tray is obstructed during its transportation as described above, the load on the motor (57) will not increase significantly, and the motor (57) will not be burnt out. Furthermore,
No separate large drag force acts between the gears interposed between the motor (57) and the tray (26), so these gears are not damaged.

Incidentally, instead of forming the engaging portions (74) (74) at the joint between the upper gear (62a) and the lower gear (62b) as described above, for example, a member having an appropriate coefficient of friction may be provided. When the lower gear (62b) is locked, the upper gear (62a)
) may rotate while sliding on the joint.

(h) Tray positioning mechanism FIG. 11 is a bottom view showing the tray positioning mechanism that positions the tray (26) at the loading position. That is, the tray positioning mechanism includes the elastic tongue piece (76) having a protrusion (76a) at the tip formed at the lower part of the fifth gear <63) that meshes with the rack gear (38) of the tray 26>, and the elastic tongue piece (76) having a projection (76a) at the tip thereof. The protrusion (55) is formed on the lower surface of the cam gear (49).

As shown in Figure (a), when the tray (26) is carried in, even if the fifth gear (63) rotates with the rotation of the cam gear (49), the elastic tongue (76) does not touch the protrusion (55). Since it does not abut, it idles at the bottom of the cam gear (49). After that, when the loading of the tray (26) is approximately completed, the protrusion (76) of the elastic tongue (76) formed on the fifth gear (63)
a) comes into contact with the outer surface of the protrusion (55) on the lower surface of the cam gear (49) (see (b) in the same figure), and the cam gear (49)
When the tray (26) is further rotated and the loading of the tray (26) is completed, the protrusion (76a) at the tip of the elastic tongue (76)
) while being able to bend and slide into contact with the protrusion (55). In this way, the protrusion (75) formed on the fifth gear (63) slides into contact with the protrusion <55) on the lower surface of the cam gear (49) while stirring the elastic tongue piece (76). The fifth gear (63) is urged in the tray carrying direction by the reaction force from the elastic tongue (76) bent in this manner. The tray (26) is thus biased, and furthermore, at this time, the rear end j is brought into contact with the clamper supporting bosses (16) (16) described above.
It is pressed into contact with such a boss and can be completely positioned at the carry-in position. At this time, since the lower gear (63a) of the fifth gear (63) faces the toothless part (50b) of the cam gear 49), even if the cam gear (49) is rotated afterwards, the fifth gear ( 63)
is not driven.

Operation The operation of this embodiment will be described below with reference to FIGS. 12 to 16.

(a) Tray loading operation Figure 12 shows the tray (26) being loaded and removed from the player! (See FIG. 5) is a plan view of the control mechanism section. At this time, the clamp lever (19) of the aforementioned clamper (10) is connected to the first protrusion (5) of the cam gear (49).
1) and is in a position that resists the bias of the spring (23), so it is located in a non-clamped position away from the turntable (8). In addition, the detection lever (39) has a contact part (45>) that is the second part of the cam gear (49).
Since it is in contact with the upper part <54) of the protrusion (52), it is positioned at a position that resists the bias of the spring (48). Furthermore, the pickup (1) is fixed at the innermost position of the disc closest to the turntable (8), and first and second rack gears (5) disposed on the pickup (1)
(6) has been completely disengaged from the small diameter portion (60a) of the second gear (60). Therefore, even if the aforementioned motor (57) is driven and the second gear (60) is driven, the motor (
The driving force from 57) is not transmitted to the pickup (1), and thus the pink-up (1) is fixed at the innermost position of the disc.

The pink up (1) is fixed using the trigger member (64).
In the above state, the second 7th gear (
6) is displaced to the right with respect to the first rack gear (5) against the bias of the spring (7).
5) is pressed against the boss (77) by the return force of the spring (7). Here, the second rack gear (6) is also connected to the spring (7).
However, the trigger member (64) restricts such leftward displacement. That is, the trigger gear (70) of the trigger member (64) meshes with the trigger gear (6b) of the second rack gear (6), and is biased counterclockwise by the bias from the spring (7) described above. , since the flange (68) of this trigger member (64) is in contact with the lower part 53) of the second protrusion (52) of the cam gear (49), the trigger member (64) is not rotated. (1) is fixed at the disk re-endoturbation position described above.

Come on, tray (26) from such a state! When the motor (57) is driven for loading, the cam gear (49) is rotated clockwise via the first, second, third, and fourth gears (59), (60), (61), and (62). The fifth gear (63) rotates counterclockwise in conjunction with this, and the loading of the tray (26) begins. On the other hand, when the tray (26) is carried in in this way, the clamp lever (19), the detection lever <39) and the trigger member (6
4) are the first protrusion (51) and the second protrusion of the cam gear (49), respectively.
The upper part (54) of the protrusion 52) and the second protrusion (52)
Each member is kept in the above-mentioned position because it is in sliding contact with the lower part (53) of.

In this way, the tray (26) is carried in, and the cam gear (4)
9) progresses to the state shown in FIG. 13, the toothless portion (50b) of the cam gear (49) faces the lower gear (63a) of the fifth gear (63), so that the fifth gear (63) ) and the cam gear (49) are disengaged, and the loading of the tray (26) is completed. In addition, at this time, as described above, the protrusion (75) disposed on the fifth gear (63) contacts the elastic tongue (76).
) while bending the protrusion (55) on the bottom of the cam gear (49).
The restoring force of the elastic tongue (76) urges the fifth gear (63) in the tray loading direction, and the tray (26) is pressed against the bosses (16) (16) and positioned at the loading position. do.

(b) Disc clamping operation As the cam gear (49) further rotates from the state shown in Fig. 13, the cam portion (51a) of the first protrusion (51) eventually comes into contact with the clamp lever (19). (see Fig. 14), the clamp lever (19) is therefore connected to the further cam gear (see Fig. 14).
49) rotates counterclockwise, displacing the protrusion (13) on the lower surface of the crank bar 10) in the direction of arrow A, thereby displacing the clamper (10) toward the turntable. Clamper like this (10)
When the is displaced toward the turntable, first the clamper (
10) The pins (15) (15) formed on the lower surface are inserted into the through holes (36) (36) formed on the upper surface of the tray (26>), and the pins (35) (35) are pressed down as described above.

The rotating rod (
33) (33) rotates, and along with this, the lifter (29)
) (29), (29) (29) are lowered, and the discs placed on the lifters (29) (29), (29) (29) are lowered and placed on the turntable (8). It will be placed. Then, the clamper (10) presses the upper surface of the disc placed on the turntable (8) in this manner, and the mounting of the disc on the turntable (8) is completed.

In addition, the clamper (10) when such clamping is completed
The relationship between the cam gear (49) and the cam gear (49) is as shown in FIG.
19) will not change any further.

(C) Disc size determination operation When the cam gear (49) rotates further after the disc clamping shown in FIG. ) faces the abutting portion (45) of the detection lever (39), and the detection lever (39) can be fully rotated counterclockwise by the bias of the spring (48). At this time, the state of the switch (40) varies depending on the size of the disc mounted on the turntable (8). That is, as mentioned above, if the diameter of the disk is large, the switch (40) remains OFF (see Figure 6), and if the diameter is small, the switch (40) is turned ON (
(See Figure 7), but by the time the switch (78) indicating disk loading completion, which will be described later, is operated,
The size of the disc can be determined depending on whether the switch (40) is turned on or not.

At this time, the switch (40) is closed even if no disc is attached to the turntable (8), but the presence or absence of such a disc is determined by the pickup (1).
) is detected by the presence or absence of reflected light from the disk.

(d) Pickup drive operation Almost simultaneously with the disk size determination operation described above, the cam gear (
The gear portion (53a) of the second protrusion (52) of the trigger member (64) meshes with the gear portion (69) of the flange (68) of the trigger member (64) (see Figure 1S). )
The trigger member (64), which was regulated by the second protrusion (52), is rotated counterclockwise by engagement with the gear portion (69). When the trigger member (64) rotates in this manner, the second rack gear (6) attached to the pick-up (1) is displaced in the direction of the biasing force of the spring (7,). (6) and the small diameter portion (60a) of the second gear (60) are engaged, and furthermore, the engagement between the trigger gear (70) of the trigger member (64) and the trigger gear (6b) of the second rack gear (6) is released. (See Figure 16).

Therefore, the driving force from the first motor (57) is transmitted to the pickup (1) via the second rack gear (6). Then, when the pickup (1) is slightly displaced in the outer circumferential direction in this manner, the switch (78) is opened, and due to the change in the state of the switch (78), the end of the above-mentioned loading is detected, and the motor (57) will be stopped.

At this time, the cam gear (49) has a toothless part (50a) formed on the upper part of its outer periphery facing the lower gear (62b) of the fourth gear (62), and the fourth gear (62) and the cam gear Since the mesh with (49) is released, it is not rotated.

Further, since the cam gear (49) receives a clockwise bias from the spring (67) via the trigger member (64), the protrusion (56) on the lower surface of the cam gear (49) is pressed against the boss (79). The cam gear (49) is then fixed in this position.

(e) Disc playback operation After the above-mentioned disc loading operation is completed, when a disc playback operation is performed on the player, the pickup (
1) is activated and the beam is irradiated onto the disk. The presence or absence of a disk is determined by detecting the presence or absence of the reflected light using a photosensor in the pickup (1). Here, if the absence of a disc is detected, the player is set to a stop mode. On the other hand, when the presence of a disc is detected, the spindle motor (
9) is activated. That is, if the disk is large, its moment of inertia is also large, so the gain of the spindle motor (9) control system is set large, and conversely, if the disk is small, the gain is set small. After rotating the disk in this manner, the pickup (1) is moved a small distance toward the inner circumference of the disk, and the table of contents information (D, 0.C: Table-O
f-Contents), normal playback is performed. When the disc has finished playing, the pickup (1) is moved to the innermost circumference, and the switch (78
) is closed, the player waits for the next operation command (see FIG. 16).

(f') Disc unloading operation The disc is unloaded by the reverse procedure to the above. That is, when the motor (57) is driven in the opposite direction to the direction in which the disk was loaded, the second rack gear (6) of the pickup 1) is displaced further to the right than the state shown in FIG. When the 2.7th rack gear (6) is displaced, the trigger gear (6b) of the second rack gear (6) and the trigger member (6) are displaced.
4) is engaged with the trigger gear (7o), and further displacement of the second rack gear (6) causes the trigger member (64) to rotate clockwise against the bias of the spring (67). The rotation of this trigger member (64) causes the cam gear (49) to
is rotated counterclockwise, the cam gear (49) and the fourth gear (62) mesh again, and the cam gear (49) engages with the motor (
It is rotated counterclockwise by receiving the driving force from 57〉.

When the cam gear (49) is rotated counterclockwise in this way,
The second rack gear (6) is further displaced via the trigger member (64), and eventually the flange (6) of the trigger member (64)
8) and the second protrusion (69) of the cam gear (49).
52) is disengaged from the gear portion (53), and the flange portion (68) comes into sliding contact with the second protrusion (52). Therefore, the first rank gear (5) is the second rank gear (6).
) is pressed against the boss (79) by the compressed spring (7), and at this time, due to the displacement of the second rack gear (6), the connection between the second rack gear (6) and the second gear (60) is The mesh is released. Thus, the pickup (1) is fixed at the innermost position of the disk. Thereafter, when the cam gear (49) is further rotated by the motor (57), the clamper (1o) is separated from the turntable (8) by the reverse procedure to the above, and in conjunction with this, the disc is moved away from the lifter (8). 29
) (29) (29) (29) is lifted and separated from the turntable (8), and further the cam gear (49)
and the lower gear (63a) of the fifth gear (63), the fifth gear (63) is rotated, and the tray (26) is moved in the unloading direction. When the L-(26) reaches the predetermined unloading position, the protrusion on the lower surface of the cam gear (49) <56
) closes a switch (not shown), stops driving the motor (57), and unloading of the tray (26) is completed.

(G) Effects of the Invention As described above, according to the present invention, since the lifter is not recessed at the tray pull-out position, it is easy to engage the periphery of the disc with the lifter, and the operability of the player is improved. Moreover, since the retraction of the lifter is restricted by simply forming, for example, an abutment part on the chassis inside the player that faces the lower surface of the lifter at the tray pull-out position, the structure can be extremely simplified.

[Brief explanation of the drawing]

The figures all show one embodiment of the present invention; Fig. 1 is an exploded perspective view, Fig. 2 is a perspective view showing the tray, Fig. 3 is a perspective view of the mechanism, and Fig. 4 shows the tray removed. FIG. 5 is a plan view with the tray removed, FIG. 6 and FIG. 7 are plan views for explaining the disk size determination mechanism, and FIG.
a), (b), and (c) are perspective views, top views, and bottom views showing the cam gear; FIG. 9 is a side view showing the damage prevention mechanism; FIG.
The figure is a perspective view showing the fourth gear, FIG. 11 is a bottom view showing the tray positioning mechanism, and FIGS. 12, 13, 14, 1S, and 16 explain the operation of the control mechanism. In the drawings, (a) is a plan view, and (b) is a side view. (25>... Projection (contact part), (26)... Tray, (29)... Lifter.

Claims (1)

[Claims] (1) A tray for transporting discs that moves between a pull-out position pulled out outside the player and a carry-in position carried into the player, and a lifter for lifting and lowering discs that is arranged to be able to move in and out of the tray. and an abutting portion that abuts against the lower surface of the lifter to prevent the tray from retracting when the tray is in a pulled-out position.