JPH0544921Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a clamp mechanism in a disc player.

The clamp mechanism that presses the disc against the turntable during disc performance basically consists of a pressing member that cooperates with the turntable to clamp the disc and rotates together with the turntable, and a support that rotatably supports the pressing member. It has a mechanism. When pressing the disc against the turntable, so-called centering is performed to align the respective rotation centers of the pressing member and the turntable with each other, but in the conventionally proposed clamping mechanism, the mechanism for performing such centering is complicated. Therefore, the cost was increasing. Further, there has been a demand for measures to extend the life of the contact portion between the pressing member and the support mechanism, that is, the bearing portion, against wear as long as possible.

The present invention has been made in view of the above points, and its purpose is to provide a clamp mechanism that is low in cost and has high wear resistance of the bearing portion.

The clamping mechanism according to the present invention is a clamping mechanism for a disk player that includes a pressing member for pressing a disk placed on a turntable to clamp it, and a support mechanism that rotatably supports the pressing member. The pressing member has a cylindrical portion that is formed concentrically with the center of the pressing surface on the back surface of the pressing surface that presses the disk and opens upward, and the supporting mechanism is configured to support the pressing member. a cylindrical member formed so as to surround the outer periphery of the member and having a regulating portion provided at the lower end thereof to regulate downward movement of the pressing member; a support member disposed as shown in FIG. A circular engagement recess with an opening diameter smaller than the diameter of the spherical bearing member is formed in the member, and the center of the circular engagement recess is arranged so as to be located on the rotation center axis of the turntable when clamped. The spherical bearing member loosely inserted into the space is regulated so that its center axis in the same direction as the rotation center axis of the turntable always passes within the circular engagement recess area. There is.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a front loading disk player equipped with a clamp mechanism according to an embodiment of the present invention will be described with reference to the accompanying drawings.

In the figure, reference numeral 1 indicates the entire front loading disc player.

For example, as shown in FIGS. 1 and 2, a front panel 2, a rear panel 3, a bottom plate 4, and a side plate 5
A housing 6 is formed by these, and these are connected to each other by a plurality of screws or the like. The front panel 2 is provided with an opening 2a having a rectangular groove length so that a disk supporting portion, which will be described later, can protrude out of the housing. Further, the rear panel 3 is provided with a transformer 8 and a cover 9 that covers the transformer, and a power supply cord 10 is arranged on the sides of these. Figures 2 and 4
As shown in the figure, three vertical chassis 12, 13, and 14 are fixed to the rear panel 3, and an operating section 16 for performing performance operations is fixed to the front ends of these vertical chassis. However, the term "forward" here refers to the direction indicated by arrow Y in the figure. Therefore, the direction indicated by arrow X is to the left toward the front, and the direction indicated by arrow Z is upward.

As shown in FIG. 2 and FIGS. 12 and 13, a horizontal chassis 18 is disposed between the vertical chassis 12 and 13. As is clear from FIGS. 3, 7, 12, and 13, rails 19 and 20 are fixed to both left and right ends of the horizontal chassis 18, extending back and forth. As shown in FIG. 5, a tray 23 is provided between the two rails. The tray 23 is connected to the rails 19 and 2.
Fall prevention members 19a, 20 provided at the ends of 0
rails 19 and 2 through predetermined bearing members 24a and 24b and support players 24c and 24d, which are prevented from falling off by a and 20b.
0, and is therefore slidable in the front-rear direction (the direction of arrow Y and the opposite direction). Furthermore, a movable panel 25 that can fit into and close the opening 2a of the front panel 2 is attached to the front end of the tray 23.

The tray 23 includes a housing 6 together with the tray.
A container 27 is provided which can protrude to the outside of the tray and which carries a disc 26 to be played in cooperation with the tray and is movable in the vertical direction. The container 27 and the tray 23 constitute a disk carrier. The disk 26 is of a type that records and reads signals using laser light, and has an outer diameter of about 12 cm.

As is particularly clear in FIG.
has a cylindrical recess 2 whose axial center is parallel to the vertical direction.
8 is provided. Bottom surface 28a of this recess 28
The circumferential side surface 28b is cut out, leaving both sides symmetrical in the front-rear direction and the upper part of the circumferential side surface, and the container 27 is fitted into the cutout portion so as to be movable in the vertical direction. container 2
7 has four engaging protrusions 27a that engage with the left side end surfaces of the bottom surface 28a and the circumferential side surface 28b, with the remaining end surfaces sandwiched therebetween. Further, in the cutout portion of the circumferential side surface 28b, for example, four claw portions 28c, preferably pairs of claw portions 28c extending in the vertical direction, are provided so as to face each other.

Returning to the topic, the disk carrier comprising the tray 23 and the container 27 is movably supported by a support mechanism including a horizontal chassis 18 and rails 19 and 20. Figure 2, Figure 4, Figure 5
12 and 13, the left and right rear ends of the horizontal chassis 18 as a component of the support mechanism are fixed to the vertical chassis 12 and 13 by screws 30a, respectively. It is attached to a pair of columnar members 30b via a damper 30c made of rubber or the like and by a nut 30d. These screws 30a, columnar members 30b, dampers 30c, and the like constitute the lateral chassis 18, that is, a leg mechanism that supports the rear end of the support mechanism and positions the rear end with respect to the housing 6. . However, this leg mechanism may be single in some cases. As shown in FIG. 15, the vertical chassis 12 and 13 have a pair of cylindrical members 32 disposed near the opening 2a of the housing 6 and on an axis substantially perpendicular to the direction of movement of the disk carrier.
a is fixed. Inside the cylindrical member 32a,
A shaft member 32b having an enlarged upper end and a cylindrical lower end is slidably fitted therein. A coil spring 32c is compressed between the upper end of the cylindrical member 32a and the enlarged diameter portion of the shaft member 32b. Further, a threaded portion is threaded on the inner periphery of the lower end cylindrical portion of the shaft member 32b, and a threaded portion 32d is threaded on the threaded portion.
are screwed together. The screw 32d receives a reaction force by the vertical chassis 12 and 13, and can be rotated from the outside of the housing 6. At the left and right front ends of the horizontal chassis 18, dampers 3 made of rubber or the like are attached to the upper ends of the shaft members 32d.
2e and by a nut 32f. The cylindrical member 32a and the shaft member 32
b. The coil spring 32c, the screw 32d, the damper 32e, the nut 32f, etc. constitute a leg mechanism that supports the front end of the lateral chassis 18, that is, the support mechanism, and positions the front end with respect to the housing 6. has been done. The height of the pair of leg mechanisms can be adjusted by rotating the screw 32d, which is a component of the leg mechanism, from outside the housing.

As shown in Figures 3, 6 and 12,
A pair of cam members 34 and 35 are provided on the inner walls of the left and right sides of the tray 23 so as to be movable in the front and rear directions with respect to the tray. The cam members 34 and 35 are respectively formed with cam holes 34a and 35a that slidably engage with a shaft portion 27b protruding from the engagement protrusion 27a of the container 27. Cam hole 3
The cam hole 35a has a tapered portion that slopes downward from the front toward the rear, and the cam hole 35a has a tapered portion that slopes upward from the front toward the rear. Therefore, the container 27 moves up and down by the relative movement of both cam members 34 and 35. Of the pair of cam members, the cam member 35 disposed on the right side has a rack portion 35b over almost the entire length.
is formed.

As shown in FIG. 3, FIG. 8, FIG. 25, and FIG. A holding member 39 rotatably supports 37 at its front end via a shaft 38.
is located. The holding member 39 is swingably supported at its rear end via a shaft 42 by a bracket 42 which is fixed to the lower surface of the lateral chassis 18 and supports a motor 41 as a drive source.
The holding member 39 also has a coil spring 43.
(see FIGS. 5 and 7), the swinging end portion is biased in a direction toward the lateral chassis 18. At the front end of the bracket 42, a lever 45 is attached to a shaft 42b, and one end of the lever 45 can be engaged with the upper surface of an engaging part 39a formed at the swinging end of the holding member 39.
It is rotatably attached via the The lever 45 is also biased by a coil spring 45c. That is, lever 4
By pushing up the other end portion 45b of the gear 37, the holding member 39 swings, and the meshing state between the gear 37 and the rack portion 35b is released. Additionally, a bracket 46 is attached to the front end of the vertical chassis 12.
A screw 46c is provided through the screw 46a and biased by a coil spring 46b, and the tip of the screw 46c engages with the other end 45b of the lever 45. That is, by tightening or loosening this screw 46c from outside the housing, the lever 45, and thus the holding member 39, is swung (see FIG. 30).

A worm 47 having a pulley portion 47a formed at one end is rotatably supported by the holding member 39 via a shaft 47b. The pool portion 47a is connected to a small pulley 41a fitted to the output shaft of the motor 41 by a belt 48. A worm wheel 50 that meshes with the worm 47 is also pivotally supported on the holding member 39 via a shaft 50a. Further, the gear 37 is coaxially connected to the worm wheel 50.
A gear 51 that meshes with is rotatably supported. As shown in FIGS. 27a and 27b, substantially saw blade-shaped engaging portions 50a and 51a are formed on the opposing surfaces of the worm wheel 50 and the gear 51, respectively, allowing rotation in only one direction. . However, in this case, the engaging portions 50a and 51a are formed so that only power is transmitted from the worm wheel 50 to the gear 51. In addition, the worm wheel 50 and the gear 51 are connected to the coil spring 5.
3 in the direction toward each other.
A receiving member 53a is interposed between the coil spring 53 and the wall surface of the holding member 39.

The worm wheel 50, the gear 51, and the spring 53 described above make the worm wheel 5
A one-way clutch is configured that only transmits power from the gear 37 to the gear 37. Further, as shown in FIG. 27b, a worm wheel 50 and a gear 51
At least the opposing surface of the serrated engagement portion 50a
A viscous agent 55 such as grease is filled between the clutch and the clutch 51a, thereby suppressing the generation of noise caused by the engagement of the saw blade-shaped engaging portions during operation of the one-way clutch.

The small pulley 41a, the worm 47, the belt 48, the one-way clutch, and the gear 37 constitute a deceleration mechanism, and the deceleration mechanism and the motor 41 drive the cam member 35 in the front-rear direction. A driving force applying means for applying force is configured. Note that the configuration of the one-way clutch is not limited to the combination of the worm wheel 50 and the gear 51, but depending on the configuration of the speed reduction mechanism, it may be a combination of spur gears, or a spur gear and a helical gear. Various combinations are possible, such as. In other words, any combination of various gears including a worm wheel is sufficient.

By the way, the worm wheel 50 and the gear 51
The coil spring 53 that urges the worm wheels 50 toward each other also functions as a friction applying means that applies friction to the worm wheel 50 in the direction of rotation thereof. By having such a friction imparting means, the bump between the worm 47 and the worm wheel 50 can be absorbed and removed during the operation of the worm and the worm wheel.

The story goes back and forth, but the holding member 39 that holds the speed reduction mechanism and is swingably provided on the horizontal chassis 18 and therefore the housing is made to swing, and the gear 37 and the rack part 35b are engaged with each other. When the condition is released, the tray 23 will fly out of the housing simply by tilting the front loading disk player, for example, while it is being transported. In order to prevent this, a fixing means is provided that can fix the tray 23 housed in the housing 6 to the housing and from outside the housing. As shown in FIGS. 3, 6, 7, and 28, the fixing means includes a bracket 57 fixed to the rear end of the upper surface of the horizontal chassis 18, and a bracket 57 rotatably supported by the bracket. a shaft 58 having a threaded portion formed at its front end; and a retaining member that is fitted onto the shaft 58 and restricts the longitudinal movement of the shaft within a predetermined range together with the enlarged diameter portion 58a at the rear end of the shaft. 58b, and a coil spring 59 that is disposed between the bracket 57 and the retaining member 58b and applies a bias force to the shaft 58.
and the shaft 5 is fixed to the rear end of the tray 23.
8 and a bracket 60 that can be screwed into the threaded portion 8, and peripheral small members related to each of these members. That is, when transporting the front loading disc player, it is sufficient to screw the threaded portion of the shaft 58 into the bracket 60 before shipping.

Next, an interlocking mechanism for interlocking the left and right cam members 34 and 35 provided on the tray 23 will be explained.

As shown in FIGS. 3, 5, 6, and 16, a support shaft 63 is provided near the rear end of the tray 23 and extends in the vertical direction. Support shaft 6
3, a rotary lever 64 whose one end is pivotally connected to the rear end protrusion 34c of the left cam member 34 is attached so as to be rotatable within a predetermined range. Cam member 34
The rear end protrusion 34c projects from the upper surface of the tray through a long hole 23a formed in the tray 23 corresponding to the rear end protrusion. Among the rotational positions of the rotational lever 64, the rotational lever 64 is at the position shown in FIG. The position in FIG. 16 where the lever cannot be rotated any further in the counterclockwise direction is referred to as the non-operating position of the rotary lever.
Further, the rotary lever 64 is moved from the non-operating position to the 16th position.
The operating position of the rotary lever is the position where the rear end protrusion 34c engages with the front end of the elongated hole 23a by rotating clockwise in the figure and the rotary lever 64 cannot rotate any further in the clockwise direction. to be called.

A swinging lever 65 that comes into contact with the upper surface of the rotating lever 64 is further swingably supported on the support shaft 63, and the swinging end of the swinging lever is connected to the right cam member 35, that is, the drive It is pivotally connected to the rear end protrusion 35c of the cam member on the side to which force is applied. The rear end protrusion 35c of the cam member 35 projects from the upper surface of the tray through a long hole 23b formed in the tray 23 corresponding to the rear end protrusion. The end protrusion 35c is the elongated hole 2
It is swingable within a range that engages with the front and rear edges of 3b. An engagement shaft portion 65a is protruded from the lower surface of the swing lever 65 near its swing end, and the engagement shaft portion is connected to an opening 64a formed at the other end of the swing lever 64. It is inserted into the That is, the swing lever 65 is
5a is swingable relative to the rotating lever 64 within the range in which the opening 64a engages with the front and rear edges of the opening 64a. The engagement shaft portion 65a further extends downward from the tray through an elongated hole 23c formed substantially parallel to the elongated hole 23b, and is configured to engage with a prohibition plate to be described later. In addition, the swing lever 6
5 is applied with a bias force by a coil spring 65b whose one end is connected to the rotation lever 64.

A coil spring 67, which is a spring member, is connected to the left end of the rotating lever 64, and the rotating lever 64 is urged toward the non-operating position by the coil spring.

Further, a swing plate 69 is swingably supported on the lower surface of the tray 23 by a shaft 68.
A pin 69a is protruded from the swinging end of the swinging plate 69, and the pin 69a is pivotally connected to a pivoting portion 35d provided on the inner wall surface of the rear end of the cam member 35 to which driving force is applied. has been done. As is particularly clear in FIG. 16, a support protrusion 70 is provided protruding near the shaft 68 that supports the swing plate 69. The support protrusion 70 is arranged so that the straight line connecting the pivot center of the swing plate 69, that is, the axial center of the shaft 68, and the central axis of the support protrusion is parallel to the left-right direction (arrow X direction and the opposite direction). , and cam member 35
The distance from the cam member to the shaft 68 is greater than the separation distance between the cam member and the shaft 68. A coil spring 71 serving as a spring member is tensioned between a pin 69a provided at the swinging end of the swinging plate 69 and this support protrusion 70.

The coil spring 71 is connected to the rotary lever 6 via a pin 69 and a cam member 35 to which the pin is pivotally connected.
4 is designed to be able to apply the following biasing force.

When the cam member 35 is in the position shown in FIG. 16, that is, at the forward limit position of the cam member, the coil spring 71 hardly applies any urging force to the rotating lever 64. However, when the cam member 35 is driven and reaches the rear limit position, the direction of extension of the coil spring 71 changes and the rotary lever 64 is biased by the coil spring toward the operating position of the rotary lever. It will be done.

Here, the above-mentioned coil spring 67 is
It is called a biasing means. In addition, the swing plate 6
9. By the support protrusion 70, the coil spring 71, and surrounding members related to each of these members,
A second biasing means is provided that biases the pivot lever 64 toward its operating position only when the pivot lever 64 is in its operating position.

Furthermore, by the support shaft 63, the rotation lever 64, the swing lever 65, the first biasing means, the second biasing means, and peripheral members related thereto,
An interlocking mechanism is provided on the tray 23 and interlocks the left and right cam members 34 and 35 with each other.

Next, the interlocking mechanism is connected to the tray 23 until the tray 23 moves and reaches a predetermined position inside the housing 6.
The locking means for locking 3 will be explained.

As is clear from FIGS. 3, 4, 6, and 16, the cam groove 7 is formed on the bottom surface of the tray 23.
A cam plate 75 having a diameter of 5a is attached so as to be movable in the front-rear direction. The rear end of the cam plate 75 has a protrusion 75b that can come into contact with a predetermined contact member 76 fixed on the horizontal chassis 18.
is formed. In addition, the swing plate 69
A prohibition plate 7 is attached to the shaft 68 that swingably supports the
8 is rotatably supported. Prohibited plate 7
A cam groove 75a of a cam plate 75 is provided at one end of the 8.
An engaging protrusion 78a that slidably engages is provided in a protruding manner. The other end of the prohibition plate 78 engages with the engagement shaft portion 65a provided near the swing end of the swing lever 65, as described above. As described above, since the other end of the inhibition plate 78, which engages with the cam groove 75a at one end, engages with the engagement shaft 65a, the swinging of the swing lever 65 is prohibited. be. Further, a bias force is applied to the cam plate 75 and the inhibition plate 78 by a coil spring 79. Note that when the tray 23 reaches a predetermined position in the housing 6, the protrusion 75a of the cam plate 75 comes into contact with the predetermined contact member 76 and moves forward. The prohibition plate 78 rotates as the prohibition plate 78 moves forward, and the engagement between the other end of the prohibition plate and the engagement shaft 65a of the swing lever 65 is released. Only in this way will the interlocking mechanism be unlocked.

Further, the other end of the prohibition plate 78 that engages with the engagement shaft 65a of the swing lever 65 is provided with an engagement shaft while the swing lever 65, which is a component of the interlocking mechanism, swings. A guide portion 78b is formed that always smoothly abuts on the guide portion 65a.

The above-mentioned cam plate 75 and prohibition plate 78
and coil springs 79 and their related peripheral members, the tray 23 is held at a predetermined position within the housing 6, i.e., the center of rotation of the disk 26 supported by the tray 23 and the container 27 is aligned with the support wheel described below. The interlocking mechanism is not connected to the tray 23 until it reaches a position that coincides with the center of rotation.
A locking means is configured to lock against.

Here, the configuration of the prohibiting means that prohibits the tray 23 from moving relative to the housing when the tray 23 reaches the above-mentioned predetermined position in the housing 6 will be explained.

Figures 3, 5, 6, 11 and 19
As shown in the figure, a support stand 82 is fixed to the upper surface of the rear end of the lateral chassis 18. Note that the protrusion 7 formed at the rear end of the cam plate 75 described above
The predetermined abutment member 76 that can be abutted by the support base 82 is a part of the support base 82 . The support base 82 has a rear end contact portion 23 of the tray 23 directly above the predetermined contact member 76.
A prohibition member 83 is provided that comes into contact with the tray d (shown in the sixth figure) and prohibits movement of the tray in the storing direction. However, the prohibition 83 also includes the case where it is a part of the support base 82 like the predetermined abutment member 76. Further, a prohibition lever 8 is provided on the upper end protruding portion 82a of the support base 82.
5 is swingably supported at its front end via a shaft 85a. For example, Figures 6 and 1
As is clear from FIGS. 6 and 19, the prohibition lever 85 can engage with a prohibition shaft 86 protruding from the rear end of the upper surface of the tray 23 at its rear end surface. However, in the state shown in FIG.
The rear end surface of No. 5 and the inhibition shaft 86 are not yet completely engaged. The prohibition lever 85 is controlled by a shaft member to be described later.
is swung from this state by a predetermined amount in the clockwise direction in FIG.
The position where the two are completely engaged is called the prohibition position of the prohibition lever 85. Further, the position of the prohibition lever 85 in which the rear end surface and the prohibition shaft 86 are not engaged is referred to as the non-prohibition position of the prohibition lever. That is,
The prohibition lever 85 is swingable between the prohibition position and the non-prohibition position.

As is particularly clear in FIGS. 5, 6, and 19, the inhibiting lever 85 has a shaft protruding from the upper surface near the swinging end of the swinging lever 65, which is a component of the above-mentioned interlocking mechanism. The member 87 is formed with a cam portion 85b that can be engaged when the prohibition lever is in the prohibition position. As described above, the swing lever 65 is engaged with the opening 64a of the swing lever 64 at the engagement shaft portion 65a so that the swing lever can swing freely within a predetermined range with respect to the swing lever 64. are doing. In the cam portion 85b, the prohibition lever 85 swings as the swing lever 65 swings in the predetermined range with respect to the rotation lever 64, so that the rear end surface of the prohibition lever engages with the prohibition shaft 86. The tray 23 is formed to be prohibited from moving in the protruding direction. The prohibition lever 85 is urged by a coil spring 89 toward the non-prohibition position of the prohibition lever.

The above-described prohibition member 83, prohibition lever 85, prohibition shaft 86, coil spring 89, and related peripheral members prevent the tray from moving relative to the housing 6 when the tray 23 reaches the predetermined position within the housing 6. Prohibited means are configured.

Further, a disk carrying section consisting of the tray 23 and the container 27 described above, a support mechanism including the horizontal chassis 14 and rails 19, 20, predetermined bearing members 24a, 24b, a leg mechanism supporting the support mechanism, and a cam member 34 are provided. , 35 and the cam member 35
a holding member that holds the deceleration mechanism of the driving force applying means; an interlocking mechanism that interlocks the cam members 34 and 35; The locking mechanism that locks the interlocking mechanism with respect to the tray until reaching the tray and the inhibiting means support the disk 26 and move the disk 26 in the first predetermined direction (back-and-forth direction) and the second predetermined direction (perpendicular thereto). A disk conveying mechanism is configured to move the disk vertically (in the vertical direction) and convey it to a performance position.

Next, a description will be given of the playing means provided in the housing 6 for performing disk performances.

As shown in FIGS. 3, 8, 12 to 14, 17 and 18, an optical pickup means (see FIG. A carriage 93 carrying a cartridge (not shown) is arranged. A rack portion 93a is provided at the right end of the carriage 93 and extends in the front-rear direction, which is the direction in which the carriage moves. A pair of guide shafts 94 and 95 are fitted on the left end of the carriage 93, that is, on the opposite side of the carriage from the rack member 93a, and extend parallel to each other in the horizontal direction (in this case, the front-rear direction) and are spaced apart from each other in the vertical direction. There is. The carriage 93 is connected to these guide shafts 94 and 95.
It is guided by a guiding means consisting of.
A support number 96 is fixed to the lower surface of the horizontal chassis 18. A pair of contact surfaces 96a and 96b are provided on the right side of the support 96 and are parallel to each other. The upper guide shaft 94 of the pair of guide shafts is fixed to the contact surface 9 by a pair of front and rear fixing members 98a and screws 98b.
It is fixed at 6a. Further, the lower guide shaft 95 can abut the lower abutment surface 96b. A detection switch 99a for detecting the limit position of the carriage when a part of the carriage 93 comes into contact with the support base 96 is attached via an adjustment member 99b for adjusting the position of the detection switch. ing.

Here, the chassis 18, the support stand 96, etc. constitute a support mechanism that supports the guide means consisting of the guide shafts 94 and 95.

Further, as shown in FIG. 10, a holding member 103 is disposed on the lower surface of the lateral chassis 18 and rotatably holds a gear 101 at its front end that meshes with a rack portion 93a provided on the carriage 93. ing. The holding member 103 is the horizontal chassis 18
It is swingably attached to an intermediate plate 102 fixed to the lower surface via a shaft (not shown) fitted into a hole (not shown) formed at the rear end. Also attached to the holding member 103 is a motor 104 having a worm 104a fitted to its output shaft, and the worm 104 is attached to a spherical bearing 1
04b and the holding member 1 through the bearing member 104c.
03. Also, gear 10
A worm wheel 105 is provided which meshes with the worm 2 and the worm 104.

These motor 104, worm 104a, and worm wheel 105 constitute a drive source that drives gear 102. Further, the drive source and the gear 102 constitute a driving force applying means for applying a driving force to the carriage 93. The holding member 103 that holds the gear 102 and the drive source is connected to the rack portion 93 of the carriage 93 by a spring member 106.
It is biased in the direction approaching a. Also, gear 1
In order to prevent the holding member 103 from swinging unnecessarily in the direction in which the holding member 103 moves away from the rack portion 93a, the intermediate plate 102 is provided with a prevention screw 107 that engages with the holding member 103.

Figures 3, 7, 9, 12 to 1
As shown in FIG. 4 and FIGS. 21 to 24, the disk 2 is disposed in the direction of movement of the carriage 93.
A spindle motor 112 is disposed for rotationally driving a support wheel 111 that is a turntable that carries a rotor. Note that the support wheel 111 has a movable portion 111b that is vertically slidable and is applied with a bias force by a coil spring 111a. It is disposed on the horizontal chassis 18 on the opposite side of the pickup with respect to the spindle motor 112, and extends substantially parallel to the optical axis, that is, in the vertical direction, on an extension of the movement locus of the optical axis of the light irradiated onto the disk 26. A leg mechanism 114 is arranged. As is particularly clear in FIG. 23, this leg mechanism 114 includes a substantially cylindrical bolt member 114a that rotatably fits into the horizontal chassis 18 and has an enlarged diameter at the lower end, and a bolt member 11
Nut 114b screwed onto 4a and bolt member 1
A spring washer 114c works together with the enlarged diameter portion at the lower end of the bolt member 14a and the nut 114b to fix the bolt portion to the horizontal chassis 18, and a cap 114d is screwed onto the upper end portion of the bolt member 114a.
and a screw 114e that is screwed into a female threaded portion formed on the inner periphery of the bolt member 114a so that its upper end can come into contact with the inner periphery of the cap 114d. That is, with the cap 114d as the fixed side, the height of the leg mechanism can be adjusted by first loosening the nut 114b and screw 114e, and then rotating the bolt member 114d.

In addition to the leg mechanism 114, the lateral chassis 18 is further provided with a pair of leg mechanisms 115 and 116 that are arranged substantially symmetrically with respect to the extension line of the movement trajectory of the optical axis and extend in the same direction as the leg mechanism 114. There is. These leg mechanisms 115 and 116 are constructed in exactly the same way as the leg mechanism 114, and their heights can be adjusted.

A first adjustment member 118 is fixed to the upper end of each of the leg mechanisms 114, 115, and 116. Also,
A support shaft 119 is fixed to the first adjustment member 118 near the leg mechanism 114 on an extension of the movement trajectory of the optical axis. The support shaft 119 extends substantially parallel to the optical axis, that is, in the vertical direction, and swingably supports the second adjustment member 120 carrying the spindle motor 112. 21st
As is particularly clear in FIGS. 22 and 24, a cylindrical pin 122a whose lower end is enlarged in diameter is fitted into the swinging portion of the second adjustment member 120. Expanded diameter portion of pin 122a and second adjustment member 120
A spring washer 122b is interposed between the two. Also, the pin 122a has a screw 122c.
is inserted. This screw 122c is
It is also inserted into a long hole 118a formed in the first adjustment member 118 and protrudes above the first adjustment member. Screw 1 protruding on the first adjustment member 118
A nut 122d is screwed into 22c. Further, a long hole 120a is formed in the second adjustment member 120 at a position a predetermined distance from the pin 122a, and a shaft member 123 is inserted through the long hole. The pin 122a and the shaft member 123 are preferably arranged on the same circumference centered on the swing center of the second adjustment member 120. The shaft member 123 includes a threaded portion 123a, an enlarged diameter portion 123b, and a hexagonal head 12.
3c, a threaded portion 123a and a hexagonal head 1
23c is coaxial, and the axial center of the enlarged diameter portion 123b is offset by a predetermined amount with respect to the axial centers of the threaded portion 123a and the hexagonal head 123c. Note that a cover 121 is fixed to the horizontal chassis 18 so as to cover the first adjustment member 118 and the second adjustment member 120. The threaded portion 123a is inserted into a hole 118b formed in the first adjustment member 118 and is inserted into the first adjustment member 118.
It is projected onto the adjustment member. First adjustment member 1
A nut 12 is attached to the threaded portion 123a protruding above 18.
4 are screwed together. That is, loosen the nuts 122d and 124, and remove the hexagonal head 12 of the shaft member 123.
The second adjustment member 120 swings by gripping the shaft member 3c and rotating the shaft member.

The above-mentioned pin 122a, spring washer 1
22b, the screw 122c, the nut 122d, the shaft member 123, and the like constitute a fixing means that can fix the second adjusting member 120 to the first adjusting member 118 at any swing position. In addition, the leg mechanism 11
4, 115, 116, the first adjustment member 118, the support shaft 119, the second adjustment member 120, and the fixing means are included in the support mechanism including the horizontal chassis 18 and the like. Further, the support mechanism including the support wheel 111, the spindle motor 112, the carriage 93, the driving force applying means for applying a driving force to the carriage 93, the holding member 103, the horizontal chassis 18, and the guide shaft 94 described above
and 95, and the surrounding members related thereto constitute a playing means for performing a disc performance.

Next, a description will be given of the clamping mechanism that clamps the disk 26 that has been transported to the performance position.

Figure 2, Figure 3, Figure 5, Figure 7, Figure 11,
As shown in FIGS. 19 and 20, a support member 128 is swingably attached to a support base 82 fixed to the upper surface of the rear end of the horizontal chassis 18 via a shaft 127. Here, the position shown by a solid line in FIG. 20, that is, the position where a pressing member to be described later comes into contact with the disk 26, is referred to as the clamp position of the support member 128, and the position shown by a two-dot chain line in the figure is referred to as the clamp position of the support member 128. This is referred to as the unclamped position of the member. That is, the support member 128 swings between the clamped position and the unclamped position. A coil spring 130 whose one end is connected to the support base 82 is attached to the rear end swinging portion of the support member 128.
are connected to each other, and the support member 128 is urged toward the clamping position by this coil spring 130. The cylindrical member 13 is fixed to the front end swinging portion of the support member 128 at its upper end. A pressing member 132 is disposed within the cylindrical member 131 so that its outer periphery is surrounded by the cylindrical member 131 . Note that a restriction portion 131a is provided at the lower end of the cylindrical member 131 to restrict movement of the pressing member 132 in the axial direction. The pressing member 132 is the support wheel 111
The disk 26 placed above is clamped in cooperation with the support wheel, and a cylindrical portion 132a is provided on the disk pressing back surface, that is, the upper surface.
is formed. Note that the support member 128 is arranged to face the disk pressing back surface of the pressing member 132.

A spherical bearing member 134 made of steel, synthetic resin, or the like is freely inserted into a cylindrical portion 132a formed in the pressing member 132. Further, a circular opening 128a having an opening diameter smaller than the diameter of the bearing member 134 is formed in the support member 128. Note that the engagement recess is not limited to such a circular opening 128a, and may be an engagement recess that can be engaged with the bearing member 134 and has an opening diameter smaller than the diameter of the bearing member.

That is, the spherical bearing member 134 can freely roll within the cylindrical portion 132a when not clamped, while the pressing member 132
When the clamp is rotated at high speed by the support member 12, the entire circumference of the circular opening 128a of the support member 128 is in line contact with the support member 128.

By adopting such a configuration, only a specific portion of the spherical bearing member 134 is attached to the support member 1.
28 and the pressing member 132, so that the entire surface of the spherical bearing member is uniformly worn, and since the contact length of the spherical bearing member 134 with the circular opening 128a is large, the spherical bearing member is prevented from engaging with the pressing member 132. It is firmly attached to the support member 128 so that no slippage occurs between the two, and
The contact pressure per unit contact length is reduced, and the life of the bearing portion is extended.

The above-described support member 128, cylindrical member 131, and bearing member 134 allow the pressing member 13 to
A support mechanism is configured to freely support 2 during rotation.

Here, the inner diameter of the cylindrical portion 132a formed on the pressing member 132 is φA, the diameter of the bearing member 134 is φB, the inner diameter of the cylindrical member 131 is φC, the outer diameter of the pressing member 132 is φD, and the supporting member 128 is formed. When the opening diameter of the circular opening 128a is φE, it is formed so as to satisfy the following two equations.

φA-φB+φC-φD<φE...(1) φA-φB<φC-φD...(2) The above equation (1) means that when the pressing member 132 presses the disk 26, the bearing member 134 closes the circular opening 128a. Indicates the conditions for reliably engaging the
In formula (2), the bearing member 134 has a circular opening 128.
The condition for the pressing member 132 to rotate without engaging the inner circumferential surface of the cylindrical member 131 in a state of being engaged with a is shown.

On the other hand, a guide plate 138 is fixed to the right end of the horizontal chassis 18. Guide plate 1
A cam body 139 is attached to 38 so as to be movable in the front-back direction. A portion of the cam body 139 is capable of engaging with the cam member 35 of the aforementioned cam members 34 and 34 on the side to which the driving force is applied. That is, the cam body 139 moves as the cam member 35 moves rearward. A support member 1 is attached to the front end of the cam body 139.
A cam portion 139a is provided at 28 so as to extend in the left-right direction and can be engaged with an engagement shaft 128b included as a part of the support member. Cam part 139
a is inclined downwardly toward the front, that is, as the cam body 139 moves forward, the support member 128 and the pressing member 132 are moved toward the container 27.
is configured to be biased away from the disk carrying surface of the disk.

The cam body 139 also has one end which is in contact with the guide plate 1
Coil spring 14 connected to the front end of 38
0 biases the tray in the protruding direction, i.e., forward.

A detection switch 141 is fixed to the rear end of the guide plate 138 for detecting completion of rearward movement of the cam body 139 when a protrusion 139b protruding from the cam body 139 comes into contact with the guide plate 138. ing.

The above-mentioned support member 128 and coil spring 1
30, a cylindrical member 131, a pressing member 132, a bearing member 134, a cam body 139, a coil spring 140, and the like constitute a clamping mechanism that clamps the disc 26 transported to the performance position.

Figure 3, Figure 6, Figure 11, Figure 19 and Figure 2
As shown in FIG. 0, at the rear of the upper surface of the tray 23, while the pressing member 132 of the clamp mechanism faces the disk supporting surface of the container 27, an engaging protrusion 128c formed on the support member 128 and A retaining member 143 is fixedly provided which engages and holds the pressing member 132 and the support member 128 apart from the disk carrying surface of the container 27. This holding member 143 has a contact rod 1 that can come into contact with a contact board 145 fixed to a support base 82 that supports the support member 128, and that constitutes a contact switch together with the contact board.
46 is attached so as to be slidable in the front-rear direction. Further, a coil spring 147 is provided that applies a bias force to the contact rod 146.
Note that this contact switch is for detecting that the tray 23 has reached a predetermined position within the housing 6, that is, the rearward movement limit. In addition, as shown in FIGS. 3 and 7, the horizontal chassis 18
A detection switch 149 is provided at the front end of the upper surface of the tray 23 for detecting that the tray 23 has reached its forward movement limit.

Incidentally, the detection signals emitted from the above-mentioned detection switches 99a, 141, the contact switch consisting of the contact board 145 and the contact rod 146, the detection switch 149, etc. are transmitted to a control section (not shown) provided in the housing 6. Ru. The motors 41 and 104 and the spindle motor 112 operate at predetermined timings described later by operation signals sent from the control section in response to each of these detection signals.

Next, the operation of the front-loading disk player having the above-mentioned structure will be briefly explained along with the playing procedure with reference to FIG. 29.

First, as shown in FIG.
is inserted into the cylindrical recess of the tray 23 protruding from the housing 6 and placed on the disk supporting surface of the container 27. Note that the operation of protruding the tray 23 and the container 27 out of the housing is performed by following a process completely opposite to the storage operation described below, and therefore will not be described in detail here.

Once the disk 26 is supported, the loading button of the operating section 16 shown in FIG. 2 is pressed. Then, the motor 41 starts rotating, the gear 37 rotates, and the cam member 35 is driven backward. However, since the interlocking mechanism that interlocks the left and right cam members 34 and 35 is locked, the cam member 34 is also driven backward together with the cam member 35, so that the tray 2
3 and container 27 move toward the rear. When the tray 23 moves backward and reaches a predetermined position within the housing 6, that is, a position where the center of rotation of the disk 26 coincides with the center of rotation of the support wheel 111, the rear end contact portion 23d of the tray 23 touches the support base 8.
2 (see FIGS. 3 and 11), the tray comes into contact with a protruding prohibition member 83, and the rearward movement of the tray is prohibited. Further, at this time, the contact switch consisting of the contact board 145 and the contact rod 146 is activated, and it is confirmed that the tray 23 has reached the predetermined position.

As shown in Fig. 29, immediately before the tray 23 reaches the predetermined position, the rear end projection 75b of the cam plate 75 abuts against a predetermined abutment member 76 provided on the support base 82, and the cam plate 75 is moved forward (about 1 mm) against the bias force of the coil spring 79.
By this forward movement, the prohibition plate 78, which has been prevented from rotating by the front end of the cam groove 75a formed in the cam plate, is stopped.
Therefore, the prohibition plate 78 is rotated at the engagement shaft portion 65a protruding from the vicinity of the swing end portion.
The other end (right end) of the swing lever 6 is engaged with
Thus, the left and right cam members 3
The interlocking mechanism linking numbers 4 and 35 is released from its locked state.

The motor 41 continues to rotate, and the cam member 35
is driven further backwards. In addition, the left and right cam members 3
4 is moved forward. Therefore, as is clear from FIG. 6, the shaft portions 27b protruding from both sides of the container 27 slide along the cam holes 34a and 35a formed in the cam members 34 and 35, respectively, and the container 27 moves downward under its own weight while carrying the disk 26. Therefore, the center hole of the disk 26 fits into the movable portion 116b of the support wheel 111, and the disk 26 is placed on the support wheel. At this time, the disk carrying surface of the container 27 separates from the disk 26, and the disk 26 becomes rotatable together with the support wheel 111.

On the other hand, as shown in FIG. 19, when the tray 23 reaches the above-mentioned predetermined position in the housing, the prohibition shaft 86 (FIGS. 3, 6, 16, (also shown in FIGS. 28 and 29) extends to a position where it can engage with the rear end surface of a prohibition lever 85 that is slidably provided on the upper end projection 82a of the support base 82. Further, an engagement shaft portion 65 provided near the swing end of the swing lever 65
a is located at the entrance of a cam portion 85b formed on the prohibition lever 85. Note that the swing lever 65 is not shown in FIG. 19, but only the engagement shaft portion 65a protruding from the swing lever 65 is shown. Moreover, FIG. 19 shows a state before the above-mentioned interlocking mechanism including the swing lever 65 operates as shown in FIG. 29. As the swinging lever 65 swings backward (in the opposite direction of arrow Y), the engagement shaft portion 65a of the swinging lever moves rearward while engaging with the cam portion 85b of the prohibition lever 85. Therefore, the prohibition lever 85
is swung clockwise in FIG. 19 against the biasing force of the coil spring 89, and is completely engaged with the rear end surface of the prohibition lever 85 and the prohibition shaft 86, thereby prohibiting the tray 23 from moving in the protruding direction. be done.

Furthermore, as shown in FIG. 20, as the container 27 moves downward, the cam body 139 (also shown in FIGS. 3, 5, and 7) engaged with the cam member 35 ) also moves backwards. Therefore, the support member 128 engaged with the cam body 139 at the shaft 128b swings downward, and the pressing member 132 provided at the swing end of the support member pushes the disk 2.
6, the disk 26 is clamped.

When the cam body 139 moves backward and reaches its rearward movement limit, as is particularly clear from FIG. 7, the protrusion 139b formed on the cam body 139
engages with a detection switch 141 fixed to the guide plate 138 and operates the detection switch;
Motor 41 stops.

Performance is possible in this state.

When an operation signal for starting a performance is issued, the carriage 93 begins to move and the performance begins.

When the performance is finished and an operation signal is issued to return the disc 26, the tray 23 and the container 27 protrude out of the housing through the completely reverse process as described above, and the disc 26 is It will be collected.

Here, prior to the tray 23 protruding out of the housing, the return of the cam body 139 to the position before operation, that is, the return operation of the clamp mechanism causes the coil that is urging the cam body forward. This is done by the spring 140, but if the coil spring 140 becomes fatigued and relaxed due to long-term use, the cam body 13
9. Therefore, the clamping mechanism will not return to the unclamped position. Therefore, as the tray 23 moves in the protruding direction, the pressing member 132 may rub the recording surface of the disk 26 and damage it, or the tray 23 may be partially damaged by the pressing member 132 and the supporting member 128. Alternatively, it is conceivable that the container 27 gets stuck or that the tray 23 becomes unable to protrude out of the housing. However, in the front loading disc player, the pressing member 132 is
A holding member 143 is provided on the tray 23, which engages with the support member 128 and holds the pressing member 132 and the support member 128 by melting from the disk support surface. , the above problems cannot occur at all.

As detailed above, in the clamp mechanism according to the present invention, the mechanism for aligning the rotation centers of the pressing member 132 and the turntable (support wheel 111) is the spherical bearing member 134.
This is an extremely simple mechanism with a circular engagement recess (circular opening 128a) formed in the support member 128 and having an opening diameter smaller than the diameter of the bearing member, resulting in low cost.

In addition, in the clamp mechanism according to the present invention,
The spherical bearing member can freely roll within the cylindrical portion of the pressing member when not clamped, but is in line contact with the entire periphery of the circular engagement recess of the support member when clamped, in which the pressing member is rotated at high speed by a spindle motor. It is becoming.

By adopting such a configuration, only a specific portion of the spherical bearing member is prevented from engaging with the supporting member and the pressing member, and the entire surface of the spherical bearing member is uniformly worn, and the circular engagement of the spherical bearing member is prevented. Since the contact length with respect to the recess is large, the spherical bearing member is firmly attached to the support member, and no slippage occurs between the two, and the contact pressure per unit contact length is reduced, so that the bearing part Longevity is achieved.

[Brief explanation of the drawing]

Fig. 1 is a schematic perspective view showing the entire front loading disc player according to the present invention, Figs. 2 and 3 are exploded perspective views showing the internal structure of the front loading disc player, and Figs. 4 to 11. 12 to 14 are a plan view, a front view, and a right side view showing a part of the internal structure and include a partial cross section, and FIG. The figure is a front sectional view showing the leg mechanism supporting the front end of the lateral chassis 18 and its peripheral members, FIGS. 16 to 28 are partial detailed views of the internal structure, and FIGS. 29 and 30 are the internal parts. FIG. 3 is a diagram for explaining the operation of a part of the structure. 2...front panel, 2a...opening, 3...
...Rear panel, 4...Bottom plate, 5...Side plate, 6...
Housing, 12, 13, 14...vertical chassis,
16...Operation unit, 18...Horizontal chassis, 19,2
0...Rail, 23...Tray, 24a, 24b
... predetermined bearing member, 25 ... movable panel,
26...disk, 27...container, 27a...
...Engaging protrusion, 27b...Shaft, 28...Cylindrical recess, 28a...Bottom surface, 28b...Surrounding side, 28c
...Claw portion, 34, 35...Cam member, 34a, 3
5a...Cam hole, 35b...Rack part, 37...
Gear, 39... Holding member, 41, 104... Motor, 42, 46a, 56, 60... Bracket,
43, 45c, 46b, 53, 59, 65b, 6
7, 71, 79, 89, 111a, 130, 14
0,147...Coil spring, 45...Lever, 47,104a...Worm, 48...Belt, 50...Worm wheel, 50a, 51a
...Approximately saw blade-shaped engagement portion, 51 ... Gear, 55 ... Viscous material, 63, 119 ... Support shaft, 64 ... Rotating lever, 65 ... Swing lever, 69 ... Swing plate, 70...Support protrusion, 75...Cam plate,
75a...Cam groove, 76...Predetermined contact member, 78
...Prohibition plate, 78b...Guide part, 82...
...Support stand, 83...Prohibition member, 85...Prohibition lever, 85b...Cam part, 86...Prohibition shaft, 87...
... Shaft member, 93 ... Carriage, 93a ... Rack part, 94, 95 ... Guide shaft, 96 ...
Support stand, 96a, 96b... contact surface, 98a...
Fixed member, 99a, 141, 149...detection switch, 101...gear, 102...intermediate plate, 103...holding member, 105...worm wheel, 106...spring member, 111...
Support wheel, 112...Spildle motor, 114, 115, 116...Leg mechanism, 118
...First adjustment member, 120...Second adjustment member, 1
27... shaft, 128... support member, 128a...
Circular opening, 131...Cylindrical member, 131a...
...Regulating part, 132... Pressing member, 132a... Cylindrical part, 134... Spherical bearing member, 138...
...Guide plate, 139...Cam body, 139a
...Cam portion, 143...Holding member, 145...Contact board, 146...Contact rod.

Claims (1)

[Claims for Utility Model Registration] A clamping mechanism for a disk player, which includes a pressing member for pressing a disk placed on a turntable to clamp it, and a support mechanism that rotatably supports the pressing member. The pressing member has a cylindrical portion that is formed concentrically with the center of the pressing surface on the back surface of the pressing surface that presses the disk and opens upward, and the support mechanism has a cylindrical portion that opens upwardly. a cylindrical member formed to surround the outer periphery of the member and provided with a regulating part at the lower end for regulating downward movement of the pressing member; and a cylindrical member facing the open end of the cylindrical part formed in the pressing member. a spherical bearing member loosely inserted into a space formed by the cylindrical part and the support member; A circular engagement recess with an opening diameter smaller than the diameter of the spherical bearing member is formed in the support member, and the center of the circular engagement recess is arranged to be located on the rotation center axis of the turntable when clamped. The spherical bearing member loosely inserted into the space is regulated so that its center axis in the same direction as the rotation center axis of the turntable always passes within the circular engagement recess region. Clamp mechanism for disc players.