JPS6113469A - Front loading disk player - Google Patents

Abstract

PURPOSE:To simplify the structure, reduce the cost, and further reduce the size of the driving mechanism of a disk carrying part by providing a V groove for guidance, bearing member, retainer, and presser member only at one side of the disk carrying part, and guiding the other side of the disk carrying part by a single member, i.e. support. CONSTITUTION:The disk carrying part consisting of a tray 21 and a container 29, support mechanism including a lateral chassis 18 as a support member, guide means consisting of the retainer 24, bearing members 24c and 24d, etc., driving force applying mechanism including a gear 37, motor 41, etc., detection switch 58, and disk conveying mechanism which carries a disk 26 with relative members and moves the disk forth and back, and up and down to a play position are constituted. Then, a spindle motor 82 is rotated with an operation signal for play and a carriage 63 begins to operate to start play. The retainer 24 moves along the V groove according to the rolling of the 1st and the 2nd bearing members when the disk carrying part moves on the lateral chassis 18.

Description

TECHNICAL FIELD The present invention relates to a disc player, and more particularly to a front-loading disc player equipped with a disc transport mechanism that automatically transports a disc to a playing position.

Background Art A disc, such as an audio disc with sound grooves on its surface or a digital audio disc on which a PGM signal is recorded, is carried by a disc holder provided in a manner that projects from the player housing so that it can be freely stored, and is completely stored in the housing. This design allows for effective use of the space on the top of the disc player, such as for placing items on it.
All kinds of front-loading disc players are already known.

Recently, such front loading disc play 17
There has been developed a disc transport mechanism that includes the above-mentioned disc holder and automatically transports the disc to the playing position or very close to it, thereby eliminating the effort involved in disc loading. When positioning the disc mounted on the disc holder outside the housing on the playing position, that is, on the turntable, the disc is moved in two directions, for example, in a direction parallel to the rotating surface of the turntable and in a direction substantially perpendicular thereto. Conveying is performed.

In order to carry out this transportation, for example, the applicant filed a patent application in 1973.
A front loading disc player proposed as No. 9-29309 includes a horizontal chassis (18) as a support member provided in the player housing, a guide means provided on the horizontal chassis, and a turntable via the guide means. A disk holder (consisting of a tray 21, a container 29, etc.) is provided, which is movable in a direction parallel to the table rotation surface and protrudes from and can be housed in the player housing. Moreover, the above-mentioned guidance means,
The horizontal chassis (18) has both sides (
A pair of guide grooves (rail portions 18a and 18b) each having a substantially V-shaped cross section are formed on both the left and right sides of the disk holding portion to extend in the moving direction of the disk holding portion. A guide groove (no reference numeral) having a substantially V-shaped cross section formed in the slide base 22 constituting the tray 21, and a first bearing member (24c) interposed between the opposing guide grooves; A second bearing member (the same reference numeral 240 as the first bearing member is used) is disposed near each guide groove and comes into contact with the slide base (22); A pair of retainers (24a, 24b) that rotatably hold the bearing members, and a presser member (19, 20) that presses the first and second bearing members toward the horizontal chassis (18). It is configured.

As described above, in the front-loading disc player that has already been proposed, the guide grooves (rail parts 18a, 18b, etc.), the first bearing member, the second bearing member (24c), and the jJ7 are provided on both the left and right sides of the disc holder.
---s (24a, 24b) and presser member (19,
20), the number of parts constituting the guide means is large, the structure is complicated, and the cost is high.

Further, the two retainers (24a, 24b) are movable along the respective guide grooves (rail portions 18a, 18b, etc.), and are the first retainers when the disk holding portion moves on the horizontal chassis (18). As the bearing member and the second bearing member (24c) are transferred, they move together with the bearing members along the guide groove, but for some reason both retainers (24a, 24b) move into the guide groove (the rail portion 18a, 181, etc.), and the forward movement of both retainers is restricted, it becomes impossible for the bearing member to move along with the forward movement of the disk holding section, and the disk holding section and The bearing members are brought together. In response to the relatively large resistance force generated by this sliding, it is necessary to provide a large driving force to move the disk holder, and the a! The problem was that the structure was large.

The present invention has been made in view of the above-mentioned problems, and its purpose is to provide a simple structure, low cost, and a drive mechanism for moving the disk holding section. To provide a front loading disc player that can be made small.

In the front loading disc player according to the present invention, a guide means for guiding the disc carrier on the support member provided in the player housing is provided with a guide means for guiding the disc carrier on the support member and the disc carrier.
A pair of V grooves are formed on the side facing each other along the direction of movement of the disk holding part, and a first groove is interposed between the two grooves.
a bearing member, a second bearing member disposed near the vortex and abutting the disk support portion, a retainer rotatably holding the first bearing member and the second bearing member, and the first bearing member. and a presser member that presses the second bearing member toward the support member, and a presser member provided on the support member that allows the disc support to move freely only on the other side with respect to the movement direction of the disc support and only in the movement direction of the disk support. It is characterized in that it consists of a supporting body that supports the device.

Embodiments Hereinafter, a front-loading disc player as 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 housing 6 is formed by a front panel 2, a rear panel 3, a bottom plate 4, and a side plate 5, which are connected to each other by a plurality of screws or the like.

The front panel 2 is provided with a rectangular and laterally elongated opening 2a so that a disk holding section, 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. As is clear from FIG. 2, three vertical chassis 12, 13, and 14 are fixed to the rear panel 3, and an operating section 16 for performing musical 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 of the front, and the direction of arrow Z is upward.

As shown in FIGS. 2 to 4, 6, and 10 to 14, a horizontal chassis 18 as a support member is disposed between the vertical chassis 12 and 13. Third
6, 10, and 11, a V-groove 18b is formed near the right end of the horizontal chassis 18, extending in the front-rear direction and spanning approximately the entire length of the horizontal chassis. There is.

On the upper left side of the horizontal chassis 18 is a support 19 made of resin or the like.
is fixed with screws, and a holding member 20 made of bent steel plate or the like is provided on the upper right side of the horizontal chassis and extends back and forth. A tray 21 is provided between the support body 19 and the pressing member 20. This tray 21 includes a slide base 22 made of a steel plate or the like, and a cover member 2 made of resin or the like and covered on the slide base 22.
3. A V-groove 228 is formed at the right end of the slide base 22 to face the V-groove 18b provided in the horizontal chassis 18, and between the two V-grooves there are, for example, three A first bearing member 24c is interposed. Also, ■Groove 18
For example, three second bearing members 24d are arranged near b and 22a, and the second bearing members 4 are rotatably held by a retainer 24 and are in contact with the upper surface of the slide base 22. . The above pressing member 20
are the first bearing member 24c and the second bearing member 2
4d toward the horizontal chassis 18. Further, the support body 19 supports the slide base 22 so as to be movable only in the front and back direction on the left side of the slide base.

The pair of jitters (7) V-grooves 18b, 22a,! :, a first bearing part U24c, a second bearing member 24d,
The retainer 24, the pressing member 20, and the support body 19 constitute a guide means for guiding the tray 21 consisting of the slide base 22 and the cover member 23. That is, the tray 21 consisting of the slide base 22 and the cover member 23 is slidable on the horizontal chassis 18 in the front-rear direction (direction of arrow Y and the opposite direction).

Further, at the front end of the cover member 23, there is provided a decorative panel 2 that can fit into and close the opening 2a of the front panel 2.
5 is attached.

As mentioned above, the guide for the back and forth movement of the slide base 22, and thus the tray 21, is provided by the grooves 18b and the flexible holding member 20, which are integrally formed in the horizontal chassis 18 by press processing, etc., with extremely high manufacturing precision. Cost reduction is achieved by using a configuration that does not require the following.

After all, in the disc player that has already been developed, the V-groove 1
In many cases, a pair of rail members made of a rigid body and separate from the horizontal chassis 18 are provided in place of 8b', and the tray is supported by both rail members via a predetermined bearing member. . However, this configuration has the problem that the tray will not slide smoothly unless the manufacturing precision of both rail members is significantly improved.
Therefore, the cost is high.

A container 29 is attached to the tray 21 at its front end so as to be able to swing vertically within a predetermined range within a predetermined range. It is being A pair of coil springs 29a are installed near the front end of the container 29.
are provided, and the container 29 is urged upward by both coil springs. This container 29 and the tray 21 constitute a disk holding section.

The disk 26 uses a laser beam to record and read signals, and has an outer diameter of about 12 cm.

As is particularly clear in FIG. 5, the swinging support shaft 29b integrally formed with the containers 2 and 9 is formed at the front end of the slide base 22 and is externally fitted onto the swinging support shaft from the front to the rear. a pair of support portions 22b having a substantially U-shaped cross section;
When the cover member 23 is attached to the slide base 22, it is held between a pair of left and right support protrusions 23a formed on the cover member so as to be located near the support portion 22b. With this configuration, the swing support shaft 29b of the container 29 is supported at the same time as the cover member 23 and the slide base 22 are assembled, thereby simplifying the assembly work.

As is also clear from FIG. 5, the cover member 23
is provided with a cylindrical recess 23b whose axial center is parallel to the vertical direction. A notch 2 is provided on the bottom surface of the cylindrical recess 23b.
3C is formed, and the swinging end of the container 29 is inserted into the notch. Furthermore, a pair of left and right disk guide protrusions 23d that extend in the vertical direction and can abut against the outer periphery of the disk are provided on the circumferential side of the cylindrical recess 23b and on the side of the swinging end of the container 29. .

Return the explanation. As understood with reference to FIG. 2, FIG. 4, FIG. 10, and FIG. It is attached to the member 30b with a nut 30d via a damper 300 made of rubber or the like. These screws 30a, columnar members 30b, dampers 30c, and the like constitute a rear leg mechanism that supports the rear end of the horizontal chassis 18 and positions the rear end with respect to the housing 6. As shown in FIG. 14, the vertical chassis 12 and 13 have a pair of cylindrical shafts disposed near the opening 2a of the front panel 2 and on an axis substantially perpendicular to the moving direction of the disk holder. Member 32a is fixed.

A shaft member 32b having an enlarged upper end and a cylindrical lower end is slidably fitted into the cylindrical member 32a. 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 screw 32d is screwed into the threaded portion. The screw 32d receives a reaction force from the vertical chassis 12 and 13, and can be rotated from the outside of the housing 6. The left and right front ends of the horizontal chassis 18 are attached to the upper end of a shaft member 32d via a damper 32e made of rubber or the like and by a nut of the same type as the nut 30d.

The cylindrical member 32a, shaft member 32b, coil spring 32C, screw 32d, damper 32e, etc. constitute a front leg mechanism that supports the front end of the horizontal chassis 18 and positions the front end with respect to the housing 6. ing. In the front leg mechanism, the height of C1 can be adjusted by rotating the screw 32d from outside the housing - as shown in FIGS. 3, 5, and 10 to 12. A moving member 33, which forms a part of the disk holding section, is provided at the right end of the slide base 22 of the tray 21 so as to be movable in the front and rear directions with respect to the tray. The movable member 33 includes a rack member 34 having a rack portion 34a formed at its lower end over substantially the entire length and disposed in contact with the lower surface of the slide base 22, and a rack member 34 disposed in contact with the upper surface of the slide base 22. It is composed of a plate 35. The rack member 34 is made of resin, and the plate 35 is a processed steel plate. plate 35
A bent portion 35a formed at the front end of the rack member 34
The front ends of the rack member 34 and the plate 35 are connected by fitting into a protrusion 34b provided at the front end of the rack member 34 and the plate 35. In addition, the rack member 34 and the plate 35
The rear end portions of are connected by screws 33a. In the movable member 33 consisting of a rack member 34 and a plate 35, the protrusion 34b and screw 33a are slidably engaged with elongated holes 22c and 22d formed in the slide base 22 to extend in the front-rear direction, respectively. This makes it movable relative to the slide base 22. An engagement protrusion 34c that slidably engages with a cam hole 29c formed on the right side surface of the container 29 is formed at the front end of the rack member 34. The front half of the cam hole 29C is a tapered portion that slopes upward from the front to the rear, and the container 29 swings up and down as the rack member 34 and therefore the moving member 33 move back and forth.

As shown in FIGS. 2 to 4, FIG. 7, FIG. 11, and FIG. A bracket 39 rotatably supports the meshing gear 37 at its front end, and is attached to the horizontal chassis 18 so as to be movable in the moving direction of the slide base 22, that is, in the front-rear direction. A motor 41 is attached to the bracket 39 via a sub-bracket 40, and a shaft 43 has a pulley 42 fixed to one end.
is rotatably provided. Pulley 42 is motor 41
It is connected by a small pulley 41a fitted to the output shaft of the motor and a belt 44 (shown in FIG. 11). The bracket 39 also rotatably supports a gear 46 that meshes with a small gear 45 fitted to the other end of the shaft 43. A small gear 47 is fixed coaxially to the gear 46, and the small gear 47 and the gear 37 mesh with each other. Further, the bracket 39 is biased toward the storage direction of the slide base 22, that is, toward the rear, by a coil spring 5o.

A deceleration mechanism is constituted by the gear 37, the small pulley 41a, the pulley 42, the shaft 43, the belt 44, the small gear 45, the gear 46, and the small gear 47, and the deceleration mechanism and the motor 41 and the rack part 34a
Therefore, a driving force applying mechanism for applying a driving force to the moving member 33 is configured.

Next, the container 29 is locked to the tray 21 until the slide base 22 and therefore the tray 21 reach the storage position in the housing 6, and when the tray 21 reaches the storage position, the container 29 is locked with the tray 21. The locking/releasing means for releasing the tray 21 and locking the tray 21 with respect to the horizontal chassis 18 will be explained.

As shown in FIGS. 5, 6, 11, and 12, at the right end of the horizontal chassis 18 and to the left of the V-groove 18b, there is a slide that projects upward and extends linearly in the front-rear direction. A portion 18c is formed, and a protrusion 34d is provided on the right side surface of the rack member 34 in correspondence with the slide portion. A first fourth part 18d and a second recess 34e are formed on opposing surfaces of the slide part 18c and the protrusion 34d so as to face each other when the slide base 22, and therefore the tray 21, is in the retracted position within the housing. On the other hand, as shown in FIG. 10, a small projecting portion 22c is formed at the right end of the slide base 22 and projects leftward. This projecting portion 22e is located between the slide portion 18c and the protrusion 34d, and the projecting portion includes the first recess 18d and the second recess 18d.
An opening 22f (shown in the fifth diagram) that can face the recess 34e is provided. Inside the opening 22f, there is a first recess 18d.
A spherical rotatable member 52 that can be engaged with the second recess 34e is disposed. Here, the dimension indicated by da in FIG. It is smaller than the dimensions. Also, the dimension indicated by db in FIG. 12, that is, one of the opposing surfaces of the protrusion 34d and the sliding portion 18c and the recess opposite to the one surface of the first recess 18d and the second recess 34e. The distance from the bottom surface of the rotatable member 52 is slightly larger than the outer diameter of the rotatable member 52.

When the first recess 18d, the second recess 34e, and the opening 22f coaxially face each other, the rear end of the slide base 22, which is a component of the tray 21, is a regulating protrusion 53 that projects from the rear end of the horizontal chassis 18. , the movement of the tray 21 relative to the horizontal chassis 18 in the tray storage direction (rearward) is restricted. Further, when the first recess 18d1, the second recess 34e, and the opening 22f face each other, the front end of the protrusion 34d provided on the rack member 34, which is a component of the moving member 33, is inserted into the protrusion 34d. An opening 22 formed near the right end of the slide base 22
(The movement of the fourth moving member 33 in the tray protrusion direction (forward) with respect to the tray 21 is restricted by coming into contact with the front edge of the +).

The first recess 18d, the second recess 34e, the opening 22, the rotatable 52, the opening 22Q, and the regulating protrusion 5 described above.
3, the first recess 18d, the second recess 34e and the opening 2.
Tray when 2f faces.

The slide base 22, and therefore the tray 21, is prevented from being stored in the housing 6 by regulating the movement of the slide base 22, and therefore the tray 21, in the tray storage direction with respect to the horizontal chassis 18, and the movement of the moving member 33 in the tray protrusion direction with respect to the tray 21. The container 29 is locked to the tray 21 until the container 29 reaches the storage position, and when the tray 21 reaches the storage position, the container 29 is unlocked from the tray 21 and the tray 21 is locked to the horizontal chassis 18. A lock/release means is configured.

The shape of the rotatable member 52 is not limited to a spherical shape.
For example, it may be cylindrical. However, by making the shape of the rotatable member 52 spherical or cylindrical, it is possible to use a very inexpensive and high-precision component such as a general-purpose steel ball as the rotatable member, and the locking/releasing means described above can be used as a rotatable member. It also becomes easier to assemble. Further, as is particularly clear in FIG. 12, the cross-sectional shape of the second recess 34e is trapezoidal. Even when the rack member 34 in which the second recess 34e is formed is made of a relatively flexible material such as resin, the second recess 34e that engages with the rotatable member 52 made of a hard material can be formed into a trapezoidal shape like this. By forming the second recess 34e
The contact pressure angle with the rotatable 52 becomes constant, and the rotatable 52
The operation becomes stable. Further, as shown in FIGS. 6 and 12, the slide portion 18c of the horizontal chassis 18
k: The cross-sectional shape of the first recess 18d provided in [] is U-shaped. The horizontal chassis 18 is made of a processed steel plate, and by forming the first recess 18d in the U-shape as described above, the formation of the first recess is extremely easy.

As shown in FIGS. 3, 6, and 10, a board 54 is fixed to the lower surface of the front end of the horizontal chassis 18, and a pair of detection switches 5 are mounted on the right side of the upper surface of the board.
8 is fixed. On the other hand, as shown in FIG. 7, the front end of the bracket 39 provided on the lower surface of the horizontal chassis 18 has a bent portion 39 that can engage the detection switch 58.
a is formed. That is, the detection switch 58 operates when the bracket 39 moves forward. Note that the downward swing limit position of the container 29 is referred to as the operating position of the container, and the upward swing limit position is referred to as the non-operational position. When the container reaches the operating position, the disk placed on the disk mounting surface 29e provided at the swinging end of the container 29 is placed on a turntable, which will be described later. 21 (consisting of the slide base 22 and the cover member 23) and the container 29, a support mechanism including the horizontal chassis 18 as a support member, a rear leg mechanism including the columnar member 30b, etc., and the same cylindrical member. Front leg mechanism consisting of 328 etc., retainer 24 and bearing part UJ240
．． 24d etc., a gear 37 and a motor 4.
a driving force applying mechanism including a first component, a bracket 39, and a first component;
The lock/release means consisting of the recess 18d, the second recess 34e, etc., the detection switch 58, and peripheral small members related thereto support the disc 26 to be played and move it in the first predetermined direction (back and forth direction) and in this direction. A disc transport mechanism is configured to move the disc in a second predetermined direction (vertical direction) perpendicular to the disc and transport it to a performance position.

Next, the playing means provided in the housing 6 for playing the disc will be explained.

As shown in FIGS. 3, 7, 13, 16, and 17, the lower surface of the horizontal chassis 18 carries optical pickup means (not shown) for reading information from the disk 26. A carriage 63 is arranged. A rack portion 63a is provided at the right end of the carriage 63 and extends in the front-rear direction, which is the moving direction of the carriage. A pair of guide shafts 64 and 65 are inserted into the left end of the carriage 63, that is, on the side opposite to the rack part 63a with respect to the carriage, and extend parallel to each other in the horizontal direction (in this case, the front-back direction) and are spaced apart vertically. ing.

The carriage 63 is guided by guide means consisting of these guide shafts 64 and 65. A support stand 66 is fixed to the lower surface of the horizontal chassis 18. A pair of contact surfaces 66a and 66b are provided on the right side of the support base 66 and are parallel to each other.

The upper guide shaft 64 of the pair of guide shafts is fixed to the contact surface 66a by a pair of front and rear fixing members 68a and screws 68b. Also,
The lower guide 1 foot 65 contacts the contact surface 66b,
Moreover, it is fixed by a pair of front and rear fixing members 68c. Further, a detection switch 69 for detecting the movement limit position of the carriage by engaging a part of the carriage 63 is attached to the support base 66 via an adjustment member 70 for adjusting the position of the detection switch. ing.

The horizontal chassis 18, the support stand 66, and the like constitute a support mechanism that supports the guide means consisting of the guide shafts 64 and 65.

The horizontal chassis 18, the slide base 22, and the cover member 23 are provided with openings 18e, 22h within the movement range of the carriage 63 so as not to block the irradiation light emitted from the optical pickup means to the disk recording surface. and 23e are formed, respectively.

As shown in FIG. 8, on the lower surface of the horizontal V-shape 18,
A holding member 72 is arranged to rotatably support a gear 71 meshing with a rack portion 63a provided on the carriage 63 at its front end.

The holding member 72 is swingably attached to an intermediate plate 73 fixed to the lower surface of the horizontal chassis 18 via a shaft (not shown) fitted into a hole (not shown) formed at the rear end. It is being Also attached to the holding member 72 is a motor 74 having a worm 74a fitted to its output shaft. The worm 74a is supported by the holding member 72 via a spherical bearing member 74b and a bearing member 74C. Further, a worm wheel 75 is provided which meshes with the gear 71 and the worm 74a.

The motor 74, the worm 74a, the worm wheel 75, and the like constitute a drive source that drives the gear 71. Further, the drive source and the gear 71 constitute a driving force applying means for applying a driving force to the rack portion 63a1 and hence to the carriage 63. In addition, the gear 71
A holding member 72 that holds the driving source is connected to the rack portion 6 of the carriage 63 by means of a spring member 76.
It is biased in the direction approaching 3a. Further, in order to prevent unnecessary rocking of the holding member 72 in the direction in which the gear 71 and the rack portion 63a are separated, a prevention screw 77 that engages with the holding member 72 is screwed into the intermediate plate 73. There is.

As shown in FIGS. 3, 4, 6, 10 to 13, and 18 to 21, a support wheel, which is a turntable, carries the disk 26 in the direction of movement of the carriage 63. 81 are arranged. The support wheel 81 is directly rotationally driven by a spindle motor 82. The support wheel 81 is provided slidably in the vertical direction and is provided with a coil spring 81a.
The movable part 81b is given an upward bias by
have. A leg mechanism 84 is attached to the horizontal chassis 18 , which is disposed on the opposite side of the carriage 63 with respect to the spindle motor 82 and extends vertically on an extension of the locus of movement of the light irradiated onto the disk 26 .

As is particularly clear in FIG. 20, this leg mechanism 84 includes a substantially cylindrical bolt member 84a that rotatably fits into the horizontal chassis 18 and has an enlarged diameter at the lower end, and a bolt member 84a.
t,: Spring washer 8 that cooperates with the screwed nut 84b, the lower end enlarged diameter portion of the bolt member 84a, and the nut 84b to fix the bolt member to the horizontal chassis 18.
4c, a cap 84d screwed onto the upper end of the bolt member 84a, and a screw 84e screwed onto a female thread formed on the inner periphery of the bolt member 84a so that its upper end can come into contact with the inner surface of the cap 84d. It is made up of. That is, with the cap 84d as the fixed side, the height of the leg mechanism can be adjusted by first loosening the nut 84b and screw 84e, and then rotating the bolt member 84a.

In addition to the leg mechanism 84, on the horizontal chassis 18, a pair of leg units #185 and 86 are arranged approximately symmetrically with respect to the extension line of the movement trajectory of the optical axis of the irradiated light and extend in the same direction as the leg mechanism 84. is provided. These leg mechanisms 85 and 86 are constructed in exactly the same way as the leg mechanism 84, and their heights can be adjusted. Leg mechanisms 84, 85 and 86
A first adjustment member 88 is fixed to each upper end portion of. Further, a support shaft 89 is fixed to the first adjustment member 88 on an extension of the movement trajectory of the optical axis and near the leg mechanism 84 . The support shaft 89 extends substantially parallel to the optical axis, that is, in the vertical direction, and swingably supports the second adjustment member 9° carrying the spindle motor 82.

As is particularly clear in FIGS. 18, 19, and 21, a cylindrical bottle 92a whose lower end is enlarged in diameter is fitted into the swinging end of the second adjustment member 90. bottle 92a
A spring washer 92b is interposed between the enlarged diameter portion and the second adjustment member 90. Further, a screw 92c is inserted through the bottle 92a.

This screw 92c is also inserted through a long hole 88a formed in the first adjusting member 88 and protrudes above the first adjusting member. A nut 92d is screwed into a screw 92c protruding from the first adjustment member 88. In addition, the second adjustment member 9
0, a long hole 9 is located at a predetermined distance from the bottle 92a.
0a is formed, and a shaft member 93 is inserted through the elongated hole. The bottle 92a and the shaft member 93 are preferably
They are arranged on the same circumference around the center of swing of the adjustment member 90. The shaft member 93 includes a threaded portion 93a and an enlarged diameter portion 93.
The threaded part 93a and the hexagonal head 93c are coaxial, and the axial center of the enlarged diameter part 93b is offset by a predetermined amount with respect to the axial center of the threaded part 93a and the hexagonal head 93C. ing.

Note that a cover 94 is fixed to the horizontal chassis 18 so as to cover the first adjustment member 88 and the second adjustment member 90. The threaded portion 93a is connected to a hole 881 formed in the first adjustment member 88.
) and protrudes above the first adjustment member. Threaded portion 93 protruding above first adjustment member 88
A nut 93d is screwed into a. That is, loosen the nuts 92d and 93d, and remove the hexagonal head 93 of the shaft member 93.
By gripping c and rotating the shaft member 93,
The second adjustment member 90 swings relative to the first adjustment member 88.

The above-mentioned bottle 92a, spring washer 92b, screw 92C, nut 92d, shaft member 93, etc. constitute a fixing means that can fix the second adjusting member 90 to the 1111th adjusting member 88 at any swing position. In addition, 8
8884.85.86, first adjustment member 88, support shaft 89
, the second adjusting member 90 and the fixing means are arranged on the horizontal chassis 1.
This is included in the above-mentioned support mechanism consisting of 8 etc.

Further, the above-mentioned support wheel 81, the spindle motor 82, the carriage 63, and the above-mentioned driving force applying means that includes the motor 74 and applies a driving force to the carriage 63;
The holding member 72, the support mechanism consisting of the horizontal chassis 18, etc., and the guiding means consisting of the guide shafts 64, 65,
These and related peripheral small members constitute a playing means for playing a disc.

Here, a description will be given of a means for stopping light irradiation from the optical pickup means when the disc holding section consisting of the tray 21 and the container 29 protrudes from the housing 6.

As shown in FIGS. 3, 6, 10, and 15, an irradiation light stop switch 96 is provided on the substrate 54 fixed to the lower surface of the horizontal chassis 18. This irradiation light stop switch 96 is provided between the laser light irradiation device of the optical pickup means and the power supply circuit, and when the switch is turned off, the supply of power supply voltage to the laser light irradiation device is cut off. Therefore, the light irradiation of the laser light irradiation device is stopped. The irradiation light stop switch 96 is a normally closed switch, and as is clear in FIG. The contact point of the irradiation light stop switch is forcibly opened by always being engaged with the lower surface.

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

As shown in FIGS. 2 to 6 and 9 to 12, a pair of bent portions 18f extending upwardly on the left and right sides of the rear end of the horizontal chassis 18 are provided with bins 97 interposed therebetween. The swinging member 98 is attached to the swinging member at the rear end G.
Being beaten. Here, the position shown by the solid line in FIG. 12, that is, the position where the pressing member described later comes into contact with the disk placed on the support wheel 81, is referred to as the clamp position of the swinging member 98, and the position shown by the solid line in FIG. The position indicated by the two-dot chain line is referred to as the non-clamped position of the swinging member. The swing member 98 swings between the clamp position and the non-clamp position. At the rear end of the swinging member 98, a coil spring 10 is connected at one end to the horizontal chassis 18.
0 is connected, and the swinging member 98 is urged toward the clamp position by this coil spring 100.

A cylindrical member 101 is screwed to the front end of the swinging member 98, that is, the swinging end thereof, at its upper end. Inside the cylindrical member 101, the outer periphery of the cylindrical member 101 is
The pressing member 102 is arranged so as to be surrounded by. Note that a pressing member 10 is provided at the lower end of the cylindrical member 101.
A regulating portion 101a is provided for regulating the downward movement of the terminal 2. The pressing member 102 is placed on the support wheel 81 and clamps the disk 26 in cooperation with the support wheel.
That is, a cylindrical portion 102a is formed on the upper surface. Note that the swinging member 98 is arranged to face the upper surface of the pressing member 102.

A spherical bearing member 104 made of steel is inserted into a cylindrical portion 102a formed in the pressing member 102. Further, a circular opening 98a having an opening diameter smaller than the diameter of the bearing member 104 is formed in the swinging member 98.

On the other hand, at the rear end of the plate 35 that forms a part of the moving member 33, the distal end of the plate 35 is slidably attached to a support portion 18Q formed at the right end of the horizontal chassis 18 and extending linearly in the front-rear direction. An engaging pin 106 is provided in a protruding manner. The right end portion of the swinging member 98 is bent downward, and a cam portion 98b that slidably engages with the engagement pin 106 is provided at the bent portion. The cam portion 98b has a tapered portion that slopes upward toward the rear, so that the swinging member 98 is caused to swing as the engaging pin 106 moves back and forth. The cam portion 98b engages with the engagement pin 106 near the support portion 18g.

In this way, by setting the engagement position of the cam portion 98b with the engagement pin 106 very close to the support portion 18g, the force of the coil spring 100 that biases the swinging member 98 is transmitted to the support portion. It will be added to 18g. Therefore, almost no load is applied to the plate 35, and thus the moving member 33 and the slide base 22, and the moving member 33 and the slide base 22 operate smoothly. Further, the engagement bottle 106 has a bottle main body 106a and a bottle main body 106a.
The support part 180 is rotatably attached to the tip of the support part 180.
and a pair of rollers 106b each engaging with the cam portion 98b.
, 106c, etc. By providing these rollers 106b and 106C, the resistance force during relative movement between the support part 18g and the cam part 981) and the engaging pin 106 is reduced, and therefore the moving member 33 and the swinging member 98 can operate smoothly. At the same time, the lifespan of the engagement pin 106 and the like becomes longer.

The above-described swinging member 98, coil spring 1°O, pressing member 102, and the like constitute a clamping mechanism that clamps the disc 26 transported to the performance position.

Note that the detection signals emitted from the detection switch 58 and the irradiation light stop switch 96 described above are transmitted to the control section 110 fixedly installed on the lower surface of the horizontal chassis 18. The motors 41 and 74 and the spindle motor 82 operate at predetermined timings described later by operation signals sent from the control section in response to each of these detection signals. The slide base 22 is provided with a protrusion 22j that engages with the detection switch 58 to operate the detection switch when the disk holding portion including the slide base reaches a protruding position outside the housing 6. As mentioned above, the bent portion 39a of the bracket 39 is adapted to engage with the actuator 58a (shown in the sixth figure) of the detection switch 58, but other members may also be connected to the actuator 58a (shown in the sixth figure).
In the case where the other member can be engaged with the bending portion 39a, the other member is made driveable by some kind of drive mechanism, and the other member is not always present on the movement locus of the bent portion 39a, and the other member is moved as necessary. Normally, the member is driven into engagement with the actuator 58a. In this embodiment, the bent portion 39a and the protrusion 22j are configured to each engage approximately half of the area of the engaging portion of the actuator 58a, thereby eliminating the need for the special drive mechanism. .

Next, the operation of the front-loading disc player having the above-mentioned configuration will be briefly explained along the playing procedure with reference to FIGS. 22 and 23.

First, as shown in FIG. 1, the disk 26 is fitted into the cylindrical recess 23b of the tray 21 protruding from the housing 6, and placed on the disk mounting surface 29e of the container 29. It should be noted that the operation of protruding the disk holding section consisting of the tray 21 and the container 29 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.

After holding the disc 26, press the O-ding button of the operating section 16 shown in FIG. Then, the motor 41 starts rotating, the gear 37 rotates, and the rack member 34
A moving member 33 consisting of a plate 35 and a plate 35 is driven rearward. However, as shown in FIG. Due to the engagement, the rack member 34, that is, the moving member 33 cannot move relative to the tray 21 consisting of the slide base 22 and the cover member 23,
Container 29 is therefore locked relative to tray 21. Therefore, due to the rotation of the gear 37, the moving member 3
3 and the tray 21 are only moved rearward. In addition,
As the tray 21 moves backward, the movable piece 52 moves on the slide portion 18C while being engaged with the second recess 34e.

Here, we will explain a case where the listener notices that the disc has been inserted incorrectly and stops the tray 21 from moving backwards by hand, or an abnormal load is applied that prevents the tray 21 from being stored due to other reasons. .

When a force is applied to prevent storage of the tray 21, the bracket 39 supporting the gear 37 is moved forward by the reaction force of the driving force that drives the moving member 33. As the bracket 39 moves forward, a bent portion 39a provided on the bracket engages with the detection switch 58 to operate the detection switch. On the other hand, the slide base 22
Since the tray 21 containing the irradiation light is not housed in the housing 6, the contact of the irradiation light stop switch 96 is still open, as is clear from FIG. The control unit 110
The detection switch 58 is activated and a detection signal is issued, the tray 21 is being driven in the storing direction, and the contact of the irradiation light stop switch 96 is not yet closed. It is determined that an abnormal load has been applied and the motor 41 is operated in reverse.

When the moving member 33 and the tray 21 continue to move rearward without the abnormal load being applied, the tray 21 reaches a predetermined storage position in the housing 6 and is placed behind the slide base 22 which is a component of the tray 21. The end protrusion 22i comes into contact with the regulating protrusion 53 provided at the contact end of the horizontal sheath 11-18, resulting in the state shown in FIGS. 10 and 23.

As is clear from FIG. 23, at this time the first recess 1
8d.

The second recess 34e and the opening 22f coaxially oppose each other. 3
Since the rearward driving force is still applied to 3, combined with the fact that the slide base 22 is stopped by the regulating protrusion 53, the movable part 52 escapes the second recess 34e from 111 and forms in the horizontal chassis 38. It enters into the first recessed portion 18d. As a result, the tray 21 is locked with respect to the horizontal chassis 18, and at the same time, the locked state of the movable member 33 with respect to the tray 21, and therefore the locked state of the container 29 with respect to the tray 21, is released. In this way, only the moving member 33 continues to move backward, reaching the state shown in FIG. 12. That is, the engaging protrusion 34c formed on the rack member 34 of the moving member 33 moves along the cam hole 29c provided in the container 29, and the container 29 swings downward while supporting the disk. Therefore, the center hole of the disk 26 fits into the movable portion 81b of the support wheel 81, and the disk 26 is placed on the support wheel.

At this time, the disk mounting surface 29e of the container 29 is separated from the disk, and the disk 26 becomes rotatable together with the support wheel 81.

On the other hand, as also shown in FIG. 12, the container 29
As the plate 35 of the moving member 33 swings downward,
The swinging member 98, which is engaged at the cam portion 98b with the engagement pin 106 protruding from the shaft, swings downward due to the biasing force of the coil spring 100. The pressing member 101 is pressed against the disk, and the disk 26 is clamped.

When the movable member 33 reaches the backward movement limit position, the bracket 39 is moved forward by the reaction force of the driving force that drives the movable member 33, and the detection switch 58 is operated. On the other hand, since the tray 21 including the slide base 22 is completely housed within the housing 6, the contacts of the irradiation stop switch 96 are closed, as is clear from FIG. The control unit 110 detects that the detection switch 58 has operated and a detection signal has been issued, that the tray 21 is being driven in the storing direction, and that the contact of the irradiation light stop switch has been closed. At the same time, it is determined that the disk holding section including the tray has reached the storage position within the housing 6, and the motor 41 is stopped. Performance is possible in this state. In addition, the irradiation light stop switch 69
By closing the contact, power supply voltage is supplied to the laser beam irradiation device of the optical pickup means.

When an operation signal for performance is issued, the spindle motor 82 rotates, and at the same time, the carriage 63 begins to operate and the performance begins.

The detection switch 69 detects that the performance has ended and the carriage 63 has reached the movement limit position. , the carriage 63 and the support wheel 81 are stopped,
At the same time, the motor 41 starts reverse operation. Therefore, as described above, the tray 21 and the container 29 protrude out of the housing 6 by following the completely opposite process to that described above. Tray 2
1 reaches the protruding position outside the housing 6, a protrusion 22j formed on the slide base 22 engages with the detection switch 58, and the detection switch is operated.

On the other hand, as is clear from FIG. 15, the contact of the irradiation light stop switch 96 is in an open state. The control unit 110 detects that the detection switch 58 has been operated and a detection signal has been sent;
Combining the fact that the disk holder is being driven in the protruding direction and the contact of the irradiation light stop switch 96 being open, this can be determined as the disk holder having reached the protruding position outside the housing 6. The motor 41 is stopped based on this judgment.

In this way, the disc is recovered.

In this embodiment, a regulating protrusion 53 is formed at the rear end of the horizontal chassis 18, and a rear end protrusion 22i is formed at the rear end of the slide base 22 to face the regulating protrusion. By providing screws that are screwed into both of these protrusions so that the screws can be tightened from outside the housing 6 as necessary, the disk support section including the slide base 22 can be firmly fixed to the housing 6. Therefore, the internal mechanism can be protected from shocks and the like when transporting the front loading disc player.

Effects As detailed above, in the front-loading disc player according to the present invention, the disc holding section (comprised of the tray 21, container 29, etc.) is mounted on the support member (horizontal chassis 18) provided in the player housing.
The guide means includes a V groove (18b) formed in the support member on one side (for example, the right side) extending in the direction of movement of the disk holder; A disk holding part (of which the slide base 22 forming the tray 21) faces the V-groove.
a V groove (22a) formed in the V groove (22a), a first bearing member (24C) interposed between the two V grooves, and a second bearing member (24C) disposed near the V groove and abutting the disk supporting section. 24d), a retainer (24) that rotatably holds the first bearing member and the second bearing member, and a retainer (24) that presses the first bearing member and the second bearing member toward the support member (lateral chassis 18). presser member (2
0), and a support (19) that is provided on the support member and supports the disc holder so as to be movable only on the other side with respect to the disc holder movement direction, that is, on the left side, and only in the disc holder movement direction. ing.

In this way, the V-groove, bearing member, retainer, and holding member for guiding are provided only on one side of the disc holder, and the other side of the disc holder is guided by a single member called the support body (19). As a result, compared to previously proposed front loading disc players in which the V-groove and bearing members are provided on both sides of the disc holder, the number of parts is reduced and the structure is simpler. The cost is lower.

Further, the retainer (24) is movable along the groove (1), and the retainer (24) is configured to support the first bearing member and the second bearing when the disk supporting portion moves on the supporting member (lateral V-shaft 18). As the member is transferred, it moves along the V-groove together with both bearing members, but for some reason, the retainer is biased towards the front end of the groove, for example, and the forward movement of the retainer is restricted. In this case, the bearing member cannot be moved as the disc holder moves forward, and the disc holder and the bearing member will rub against each other. It is necessary that the driving force for moving the disk holding section be large enough to compensate for the resistance force generated by the sliding. However, since the front-loading disc player according to the present invention is provided with only one set of the above-mentioned retainers, the number of discs The resistance force due to the sliding between the support part and the bearing member is about half. Therefore, in the front loading disc player according to the present invention, the drive mechanism for moving the disc holder can be made compact.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the entire front loading disc play 17 according to the present invention, FIGS. 2 and 3 are exploded perspective views showing the internal structure of the front loading disc play V, and FIGS. 9 is a partially detailed perspective view of FIGS. 2 and 3; FIGS. 10 to 12 are a plan view, a front view, and a right side view showing a part of the internal structure, including a partial cross section; FIG. 13 to 21 are partial detailed views of the internal structure, and FIGS. 22 and 23 are views for explaining the operation of the internal structure. Explanation of symbols of main parts 2... Front panel 2a, 18e, 22f, 22 (1. 22h, 23e... Opening 3... Rear panel 4...・Bottom plate 5・
...Side plate 6 ...Housing 8
...Patrance 9...Cover 10
......Power supply cord 12.13.14...Vertical chassis 16...
...Operation unit 18...Horizontal chassis 18b
, 22a ----V groove 18c...Sliding portion 18d...First recessed portion 18f, 35a, 39a...Bending portion 18
g...Support part 19...Support body 20...Press member 21...Tray 22...Slide base 22b...・Supporting parts 22c, 22d, 88a, 88b, 90a...
...Elongated hole 22e...Protrusion 23...Cover member 23a...Support protrusion 23b...Cylindrical recess 23c... ... Notch 23d ... Disk guide protrusion 24 ... Retainer 24c ... First bearing member 24d ...
...Second bearing member 25... Decorative panel 26... Disc 29... Container 29a, 32C, 50, 81a, 100
...... Coil spring 29b ... Swing shaft 29c ... Cam hole 29d, 34c ... Engagement protrusion 29e ...
...Disc mounting surfaces 30a, 32d, 33a, 68b. 84e, 92c... Screw 30b... Column member 30c, 32e... Damper 30d, 84b, 92d, 93d... Nut 32a... Cylindrical member 32b...Shaft member 33...Moving member 34...Rack member 34a, 63a...Rack portion 34b...
...Protrusion 34d...Protrusion 34e...
...Second recess 35...Plate 37.46.71...Gear 39...Bracket 40...Sub bracket 41.771...・Motor 41a...Small pulley 42...Pulley 43...Shaft 44...Belt 45.47...Small gear 52... . . . Movable piece 53 . . . Regulation protrusion 54 . . . Board 58.69 . . . Detection switch 63 . . . Carriage 64. Guide shaft 66...
・Support stands 66a, 66b...Abutting surfaces 68a, 68C...Fixing member 70...
・Adjusting member 72... Holding member 73...
... Intermediate plate 74a ... Worm 74b ... Spherical bearing 74c ... Bearing member 75 ... Worm wheel 76 ... Spring member 77 ... ...Prevention screw 81 ... Support wheel 81b ... Movable part 82 ... Spindle motor 84, 85, 86 ... Leg mechanism 84a ... ...Bolt members 84c, 92b...Spring washers 84
d...Cap 88...First adjustment member 89...Support shaft 90...Second adjustment member 92a, 97...Pin 93 ...Shaft member 93a...Flannel 5 portion 93b...Enlarged diameter portion 93c...Hexagonal head 94...Cover 96... ... Irradiation light stop switch 96a ... Actuator 98 ... Swinging member 98a ... Circular opening 98b ... Cam part 101 ... - Cylindrical member 101a...Restricting part 102...Press member 102a...Cylindrical part 106...Engaging pin 106a...Pin body 106b, 106c...Roller 110...
・Control unit

Claims (1)

[Claims] The disc transport mechanism includes a housing, a playing means provided in the housing, and a disc transport mechanism for carrying a disc to be played and transporting it to a playing position, and the disc transport mechanism includes a support member and a guide means on the support member. and a disc carrier disposed so as to be movable through the housing and protrude from the housing, and the guiding means may be arranged to support the disc carrier on one side in the direction of movement of the disc carrier. a pair of V-grooves formed opposite to each other along the direction of movement of the disc, a first bearing member interposed between the V-grooves, and a first bearing member disposed near the V-groove and abutting the disk supporting section. a second bearing member in contact with the
a retainer that rotatably holds the first bearing member and the second bearing member; a presser member that presses the first bearing member and the second bearing member toward the support member; and a retainer provided on the support member. and a support member that supports the disc holder on the other side with respect to the direction of movement of the disc holder and is movable only in the direction of movement of the disc holder.