JPH0430662B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to a clamp mechanism for a disc player, and particularly to a clamp mechanism suitable for use in an autoloading type disc player.

BACKGROUND ART In a so-called autoloading disk player, which is equipped with a disk transport mechanism that automatically transports the disk to the playing position, that is, onto the turntable, thereby eliminating the trouble of loading the disk, the disk placed on the turntable is Clamping is also done automatically. A conventional example of such a clamp mechanism is shown in FIG.

As shown in the figure, the clamping mechanism includes a disc-shaped pressing member 152 that performs a disc-clamping action in cooperation with a turntable 151 that rotates while supporting a disc 150 to be played, and a rotating surface of the turntable 151. Support shaft 15 extending in parallel
3, and has a swinging member 154 which is swingably supported within a predetermined range by 3 and which rotatably holds a pressing member 152 at its free end. Note that the disk pressing force is generated by a magnet (not shown) provided in the pressing member 152 or a coil spring (not shown) that urges the swinging member 154 in a direction in which the free end approaches the turntable 151. According to etc.

This clamp mechanism clamps the disk by simply swinging the swinging member 154, but in this configuration, the swinging required to avoid contact between the pressing member 152 and the disk 150 when releasing the clamp is necessary. The swing stroke H of the movable member 154 is large, which poses a problem in reducing the size of the disk player as a whole. Also,
In order to solve this problem, a clamping mechanism has been developed that includes a device that always maintains the pressing member parallel to the turntable rotation surface regardless of the swinging angle position of the swinging member. It is complicated and expensive, leading to increased costs.

Summary of the Invention [Object of the Invention] The present invention has been made in view of the above-mentioned points, and its purpose is to provide a clamp that contributes to miniaturization of the entire disk player, particularly thinning, and cost reduction. It is to provide a mechanism.

[Structure of the Invention] The clamping mechanism according to the present invention includes a pressing member that clamps a disk placed on a turntable in cooperation with the turntable, and a support shaft extending parallel to the rotating surface of the turntable. Therefore, the swinging member includes a swinging member that is swingably supported between a clamped position and an unclamped position and holds the pressing member at its free end, and the swinging member is configured to support at least the support shaft of the pressing member. The swinging member is provided with a swinging portion of the swinging member so as to be rotatable around an axis parallel to the support shaft, and one end of the swinging member is rotatably supported by It has a lever member which is pivotally attached to the support shaft and whose other rotating end can come into contact with the peripheral edge of the surface of the pressing member facing the turntable, and the swinging member and the lever member are connected to the swinging member. When the movable member is in the non-clamped position, the pressing member is held parallel to the rotating surface of the turntable, and when the movable member is in the clamped position, it is separated from the pressing member. .

Embodiments Hereinafter, a disk player equipped with a clamp mechanism 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.

As shown in FIG. 1, the front surface of the housing 2, that is, the front panel 3, is provided with a disk support portion, which will be described later, that can protrude outside the housing.
A rectangular opening 3a extending in the left-right direction is provided. However, the term "left and right" as used herein refers to the front direction indicated by the arrow Y, and the direction of the arrow X is the left direction. Further, the arrow Z direction indicates upward. Although not shown, a group of switches are provided on the rear panel 3 to operate the disc player.

As shown in FIGS. 2 and 4, a main chassis 5 as a support member is provided within the housing 2. As shown in FIGS. As is clear from FIGS. 2 to 5, a longitudinal sub-chassis 6 serving as a support member is arranged on the upper surface of the right end of the main chassis 5 and extends in the front-rear direction, and is fixed to the main chassis 5 with screws. There is. The upper surface of this sub-chassis 6 has a V-groove 6 as a guide path extending in the front-rear direction.
a is formed. Further, on the sub-chassis 6, a longitudinal holding member 7 formed by bending a steel plate or the like is provided.
It is fixed with a screw so as to face the groove 6a.

On the other hand, a support body 9 made of resin or the like is disposed near the opening 3a formed in the front panel 3 for storing a protruding disk support part, and is attached to the main chassis 5 with screws or the like. ing. A tray 10 is provided between this support body 9 and the pressing member 7. Tray 1
Reference numeral 0 denotes a cover member 11 made of resin or the like, and a slide base 12 made of processed steel plate or the like and fixed to the right side of the cover member to correspond to the sub-chassis 6.
It is formed by etc. Slide base 12
A V-groove 12a serving as a guide path is formed to face the V-groove 6a provided in the sub-chassis 6, and between the two V-grooves there are, for example, two first grooves rotatably held by a retainer 14. Bearing member 1
4a is interposed. In addition, V grooves 6a and 12
For example, there are two second bearing members 1 near a.
4b is arranged and is in contact with the surface of the slide base 12 opposite to the sub-chassis 6. The second bearing member is also rotatably held by the retainer 14. The above-mentioned presser member 7 is the first
Bearing member 14a and second bearing member 1
4b toward the sub-chassis 6.

The above-mentioned sub chassis 6, a pair of V grooves 6a,
12a, first and second bearing members 14a,
14b, the retainer 14, and the holding member 7, the right side of the tray 10 (a part of the disk carrying section to be described later), which is composed of the cover member 11, the slide base 12, etc., can be freely reciprocated only in the front-back direction. A slide guide mechanism is configured as a guide means that supports and guides at least two locations. Further, the support body 9 disposed near the opening 3a formed in the front panel 3 is connected to the tray 10.
(Accordingly, the left side part of the disk carrying part) is supported movably only in the front-back direction and at at least one place, and the cover member 11
It is slidably engaged with a slide plate 15 fixed to (a part of the tray 10).

By means of these slide guide mechanisms and the support body 9, the tray 10 (therefore, the disk holding section)
A guide support mechanism is configured to support the entire body movably with respect to the housing 2. In addition, tray 1
A decorative panel 16 that fits into and closes the opening 3a of the front panel 3 is attached to the front end of the front panel 3.

Here, as shown in FIG. 5, projections 7a and 7b that can be engaged with a retainer 14 (for example, shown in FIG. 4) are provided at both front and rear ends of the presser member 7, which forms a part of the slide guide mechanism. ing. In the slide guide mechanism described above, the retainer 14 moves as the first and second bearing members 14a and 14b roll when the tray 10 reciprocates on the sub-chassis 6, but the movement stroke of the retainer is Calculated, this is half the movement stroke of the tray 10. The projections 7a and 7b act as a regulating means for regulating the movement of the retainer at two positions corresponding to the ends of its movement stroke, that is, the ends of the movement stroke of the tray 10, respectively.

As shown in FIG. 5, the presser member 7 is designed such that the bearing pressing force at a portion of the presser member that substantially corresponds to the rearward movement restriction position of the retainer 14 is smaller than the bearing pressing force at other portions. A slit 7c is formed in. Various methods can be considered to make the bearing pressing force of one part of the presser member 7 smaller than the bearing pressing force of other parts, such as providing a special mechanism for this purpose. can be held extremely cheaply. Moreover, not only the slit 7c but also the first and second bearing members 14a, 14b when the retainer 14 reaches the backward movement restriction position.
A similar effect can also be obtained by forming a recess in the holding member 7 into which the second bearing member 14b can fit, corresponding to the position of the holding member 7.

As is clear from FIGS. 1, 4 and 6, the tray 10 includes a disk 18 (for example, as shown in FIG. A pair of longitudinal support members 19 and 20 are provided for supporting the disk and moving the disk in the vertical direction (in the direction of arrow Z and in the opposite direction). The pair of supporting members 19 and 20 are collectively referred to as a container, and the container together with the tray 10 constitutes a disk holding section. The support members 19 and 20 extend parallel to each other in the front-rear direction, and are each swingably attached to the tray 10 at one end in the lateral direction. A cover member 11, which is a component of the tray 10, is provided with a cylindrical recess 11a whose axial center coincides with the vertical direction. Openings 11b are formed at the four corners of the cylindrical recess 11a, and portions 19a and 20a of the free ends of the pair of support members 19 and 20 project into the cylindrical recess from the openings 11b. . As is particularly clear from FIG. 7, one of the portions 19a and 20a protruding from the opening 11b, for example 19a, has a support portion 19b that supports the main surface of the disk 18.
and a tapered disk guide portion 19c that is continuous with the support portion and that is engageable with the outer periphery of the disk 18. Also, a portion 19a of the support member 19 is also included in a portion 20a of the other support member 20.
A support portion 20b and a tapered disk guide portion 20c are formed in a symmetrical shape. Note that the swing support shafts 19d and 20 of the pair of support members 19 and 20
d is arranged so that when the free end of each support member swings in a direction approaching the turntable, which will be described later, the own end moves toward the center of rotation of the turntable. That is, the support member 1 for placing the disk 18 on the turntable
The swing support shafts 19d and 20d are arranged so that the tapered disk guide portions 19c and 20c of the respective support members are separated from the outer periphery of the disk as the support members 9 and 20 swing.
are arranged.

Here, the above-mentioned supporting parts 19b and 20b are designed to support the outer peripheral edge of the main surface of the disk 18, that is, the part where no information is recorded. As is clear from the above, tray 1
The disk 18 inserted into the cylindrical recess 11a (of which is formed in the cover member 11) of No. Therefore, it is possible to support the disk only on the part of the main surface of the disk where no information is recorded, and there is no fear that the disk recording surface will be damaged by contact with fine particles. There is.

As shown in FIGS. 3 to 6, a longitudinal moving member 23 extending in the front-rear direction is disposed on the right side of the slide base 12, which is a component of the tray 10, and It is movably attached to the The movable member 23 is made of resin or the like, and has a rack portion 23a formed at its lower end over substantially the entire length.

As shown in FIGS. 3 and 4, a pulley 25 is rotatably attached to the right side of the front end of the sub-chassis 6, and has a coaxial gear 24 that meshes with a rack 23a formed on the moving member 23. ing. A motor 26 having a small pulley 26a fitted to its output shaft is disposed behind the pulley 25, and a belt 27 is installed between the small pulley 26a and the pulley 25. The gear 24 described above,
A motor 26 including a pulley 25 and a small pulley 26a
and the belt 27 constitute a driving force applying mechanism that applies a driving force to the moving member 23.

As shown in FIGS. 3 and 6, tray 1
A longitudinal lever member 30 extending in the left-right direction is arranged near the rear end of the vehicle. This lever member 3
There are pins 30a extending in the left and right direction at both left and right ends of the
is provided protrudingly, and the lever member 30 is rotatably attached to (the cover member 11 of) the tray 10 by the pin. One pivoting end of the lever member 30, in this case the lower end, is pivotally attached to the moving member 23. Specifically, a pin 30b extending toward the right is provided at the lower right end of the lever member 30, and this pin 30b can freely slide into a U-shaped recess 23d formed at the rear end of the moving member 23. It is fitted in. As is clear from FIG. 6, the lever member 30 comes into contact with the lower surface of each free end of the support members 19 and 20, which are containers, at its other rotating end, that is, at the end opposite to the pin 30b with respect to the pin 30a. are in contact with each other. On the other hand, as also shown in FIG. 6, a coil spring 31 is interposed between both support members 19 and 20, and both support members are moved in the direction of arrow P in FIG. is energized by That is,
The moving member 23 is moved backward (arrow Y) with respect to the tray 10.
3), the lever member 30 serving as the interlocking means moves in the direction of the arrow Q in FIG.
direction, thereby each support member 1
9 and 20 are configured to swing in the direction of arrow P (as shown in the fourth figure) by the biasing force of the coil spring 31.

Next, both support members 19 and 20, which are containers, are locked to the tray 10 until the tray 10 reaches the storage position in the housing 2, and when the tray 10 reaches the storage position, the support members 19 and 20 are locked.
A locking/releasing means for releasing the locked state of the tray 20 and locking the tray 10 with respect to the sub-chassis 6, which is a supporting member, will be explained.

As shown in FIGS. 2 to 5, on the upper surface of the sub-chassis 6 and to the right of the V-groove 6a, there is a
A slide portion 6c is formed that extends parallel to the groove. However, this slide portion 6c is simply a planar portion and is not distinguished in shape from other portions. Further, as shown in FIG. 6, the left side surface of the moving member 23 has a sliding portion 6c.
A projecting portion 23d is provided correspondingly. A first recess 6d and a second recess 23e are formed on opposing surfaces of the sliding portion 6c and the overhanging portion 23d, respectively, so as to face each other when the moving member 23, and therefore the tray 10, is in the storage position within the housing 2. It is formed. In addition, in FIG. 5, the tray 10 is connected to the housing 2.
The tray 10 is shown housed in the housing 2, and FIGS. 1 to 4 show the tray 10 protruding from the housing 2. On the other hand, a small protrusion 12b protruding rightward is formed at the rear end of the slide base 12, which is a part of the tray 10. The protruding portion 12b is located between the sliding portion 6c and the protruding portion 23d, and the protruding portion is provided with a round opening (no reference numeral) that can face the first recess 6d and the second recess 23e. It is being A spherical movable piece 33 that can engage with the first recess 6d and the second recess 23e is arranged within the opening. Here, the dimension indicated by da in FIG. 3, that is, the distance between opposing surfaces within the relative movement range between the projecting portion 23d of the movable member 23 and the sliding portion 6c on the sub-chassis 6 is the outer diameter dimension of the movable piece 33. It's getting smaller.
Also, the dimension indicated by db in FIG. 3, that is, one of the opposing surfaces of the overhanging portion 23d and the sliding portion 6c, and the recessed portion facing the one surface of the first recessed portion 6d and the second recessed portion 23e. The distance from the bottom surface of the movable piece 33 is slightly larger than the outer diameter of the movable piece 33.

When the first recess 6d, the second recess 23e, and the opening (no reference numeral) provided in the protrusion 12b of the slide base 12 coaxially face each other, the tray 1
The bent front end portion 12c (shown in the third figure) of the slide base 12, which is a component of the slide base 12, engages with the front end portion of the sub-chassis 6, so that the movement of the tray 10 in the tray storage direction (rearward) with respect to the sub-chassis 6 is restricted. is being done. In addition, the first recess 6d, the second recess 6d,
Recessed portion 23e, protrusion 12b of slide base 12
When the openings provided in the trays face each other, movement of the moving member 23 in the tray protrusion direction (forward) with respect to the tray 10 is restricted.

The first recess 6d and the second recess 23e described above,
The opening formed in the protrusion 12b and the movable piece 33
When the first recess 6d, the second recess 23e, and the opening face each other, the movement of the tray 10 in the tray storage direction with respect to the sub-chassis 6 is restricted, and the movement of the moving member 23 in the tray protrusion direction with respect to the tray 10 is restricted. The support members 19 and 20, which are containers, are held in the tray 1 until the tray 10 reaches the storage position in the housing 2.
0, and when the tray 10 reaches the storage position, the lock/release means is configured to release the locked state of both support members to the tray 10 and lock the tray 10 to the sub-chassis 6 which is a support member. has been done.

In addition, the lock/release means and the sub chassis 6
the above-mentioned guide support mechanism including the tray 10 and the support members 19, 20, etc., the drive force applying mechanism including the moving member 23, the motor 26, etc., and the peripheral small members related thereto. The disk 18 to be played is supported by the first predetermined direction (back-and-forth direction: direction of arrow Y and its opposite direction) and a second predetermined direction perpendicular thereto (vertical direction: direction of arrow Z and its opposite direction). A disk conveyance mechanism is configured to move the disk and convey it to a performance position, that is, onto a turntable to be described later.

Next, a description will be given of the playing means provided in the housing 2 for performing disk performances.

As shown in Figures 2, 4 and 5,
A mechanical chassis 35 serving as a mounting plate on which equipment is mounted is disposed between the sub-chassis 6 and the support body 9. The mechanical chassis 35 has four legs 36, which are attached to the main chassis 5, which is a support member, through an insulator 37, which is a vibration isolating member, as is clear from FIG. The insulator 37 includes a rigid columnar leg member 38 that is screwed and fixed to the main chassis 5, which is a supporting member, through a threaded portion formed at the lower end thereof, and a rigid columnar leg member 38 that is formed in a substantially cylindrical shape and is spaced apart from the columnar leg member 38 by a predetermined gap. and a viscoelastic member 39 that is fitted onto the outside of the leg member and fixed to the leg member at its lower end. The viscoelastic member 39 is attached to the leg portion 36 of the mechanical chassis 35 which is a mounting plate.
The outer periphery near the upper end thereof is fitted into a circular opening 36a formed at the lower end thereof.
The columnar leg member 38 is made to protrude from the upper end of the viscoelastic member 39, and the protruding part has a flange which, together with the edge of the opening 36a, sandwiches the upper end of the viscoelastic member with a slight gap. A portion 38a is provided.

As is clear from FIGS. 8 to 10, the mechanical chassis 35 has a substantially rectangular opening 35a extending from its center to its rear end, and a carriage 42 is inserted into the opening. . The carriage 42 incorporates optical pickup means (not shown) for reading information from the disk 18. On the right side of the carriage 42 is a guide shaft 43 that extends in the front and back direction.
are arranged and attached to the mechanical chassis 35 at both ends thereof. Carriage 4
The right end portion of 2 is externally fitted onto the guide shaft 43 so that it can be viewed freely. On the other hand, as is clear from FIGS. 11a and 11b, an adjusting screw 44 made of resin such as nylon is screwed into the left end of the carriage 42, and the tip of the adjusting screw is connected to the mechanical chassis. It is slidably abutted on the upper surface of 35. The carriage 42 is connected to these guide shafts 4.
3 and an adjustment screw 44.

Here, the adjustment screw 44 will be explained in detail.

The adjustment screw 44 is provided not only as a part of the guide means for guiding the carriage 42, but also for adjusting the optical pickup means installed in the carriage 42, for example, in the tangential direction. Therefore, the adjusting screw 44 is screwed to prevent it from loosening after adjustment. As shown in FIGS. 14a to 14c, a slit 44a is formed on the outer periphery of the threaded portion of the adjusting screw along the axial direction of the screw, and the female thread and the slit into which the adjusting screw is screwed are formed. Adhesive is filled in between.

The slit 44a reaches the screw head 44b and passes through the screw head in the axial direction of the screw. By making the slit 44a and penetrating the screw head in this way, the slit 44 opened on the screw head 44b after the adjustment work is completed.
It becomes possible to fill the adhesive material through the opening a, which simplifies the screw fixing work. Slit 44a
If the adjustment screw 44 does not pass through the screw head 44, the adjustment screw 44 will be screwed into the carriage 42 with adhesive applied to the inside of the slit 44a in advance, and in this case, the adhesive will be applied outward as it is screwed. There is a concern that this will overflow, making the work extremely complicated.

Further, the outer diameter of the threaded portion of the adjustment screw 44 is slightly larger than the root diameter of the female screw to which it is screwed. The combination of setting the outer diameter of the threaded portion in this way and providing the slit 44a,
The adjustment screw 44 is screwed into the female screw with a predetermined elastic force. Therefore, even if some external force is applied between the adjustment operation and the adhesive filling operation, the adjustment screw will not loosen and the adjustment state will not fluctuate. Note that the same effect can be obtained even if the root diameter of the threaded portion of the adjustment screw 44 is slightly larger than the inner diameter of the female thread.

Restore description. As shown in FIGS. 9 and 10 and FIGS. 11a and 11b, the carriage 42
The mechanical chassis 35 that reciprocally carries the
A screw shaft 46, which is disposed near and parallel to the guide shaft 43, is rotatably attached at both ends.
A motor 47 as a driving source is provided in front of the screw shaft 46, and the screw shaft 46 is driven by a pulley 47.
It is rotationally driven via a, 47b and a belt 47c.

As shown in FIGS. 10 and 11a and 11b, an arm member 49 is attached at one end to the right end of the carriage 42. As shown in FIGS. A pair of half nuts 50 are attached to the other end of the arm member 49.
a and 50b are integrally provided and are screwed onto the screw shaft 46. The half nuts 50a, 50b are arranged so as to sandwich the screw shaft 46 from each other, and are separated by a predetermined distance in a direction parallel to the axial center of the screw shaft 46.

A conversion mechanism for converting the rotational force of the screw shaft 46 into a carriage movement force is formed by the above-mentioned arm member 49 and the half nuts 50a and 50b as female screw members provided integrally with the arm member. It is configured. Further, the conversion mechanism, screw shaft 46, motor 47, etc. constitute a driving force applying means for applying driving force to the carriage 42.

Here, the above conversion mechanism will be explained in detail.

As is particularly clear from FIG. 12, the arm member 4
9 has a pair of protrusions 49 that protrude in directions parallel to the axial center of the screw shaft 46 and in opposite directions.
a, 19b are provided. Protrusions 49a and 4
9b has a substantially O-shaped cross section perpendicular to the direction of extension, and as is particularly clear from FIG. The arm member 49 is attached to the carriage 42 by fitting the projections into the pair of U grooves 42a and 42b. In addition, Figure 11a
As shown in FIG. 2, the carriage 42 is provided with a retaining member 51 to prevent the protrusions 49a and 49b from coming off from the respective U grooves 42a and 42b.

As mentioned above, the cross section is approximately O in the U grooves 42a and 42b.
By fitting the shaped protrusions 49a and 49b, the arm member 49 is attached to the screw shaft 46 with the attachment end to the carriage 42 as the center.
It is possible to rotate within a plane perpendicular to the axis of the Various other configurations are possible that allow the arm member 49 to rotate with respect to the carriage 42, but the U grooves 42a, 42b and the protrusion 4
By doing this with 9a and 49b,
The structure is extremely simple.

Further, the separation distance between the pair of U grooves 42a and 42b: Sa (shown in the 13th figure) is larger than the width dimension of the arm member 49: Sb (shown in the 12th figure). is movable within a range of Sa-Sb in a direction parallel to the axial center of the screw shaft 46. However, a protrusion 42c formed on the carriage 42 between a tongue-shaped portion 49c protruding from the arm member 49 and the arm member
are elastically sandwiched, so that the arm member 49 does not wobble in the direction parallel to the axial center of the screw shaft 46.

For example, as shown in FIGS. 8 and 9, a turntable 54 that supports the disk 18 is disposed in front of the carriage 42 in the moving direction. Turntable 54 is mechanical chassis 3
It is directly rotationally driven by a spindle motor 55 fixedly attached to 5. As is clear from Figure 9,
The turntable 54 has a center hole 1 of the disk 18.
A tapered guide portion 54a is formed to fit into the turntable 8a (shown in the first figure) to align the center of the disk with the rotation center of the turntable.

The above-mentioned turntable 54, spindle motor 55, carriage 42, driving force applying means that includes the screw shaft 46 and applies a driving force to the carriage 42, guiding means consisting of the guide shaft 43, etc., and related thereto. The peripheral small members constitute a playing means for performing a disc performance.

As is clear from the above, the performance means is provided on the mechanical chassis 35, which is a mounting plate, and is separated from the aforementioned disk transport mechanism and is attached to the housing 2 separately from the disk transport mechanism. There is. As will be explained in detail later, the mechanical connection between the playing means and the disk conveying mechanism is released at least during the playing of the disk. Further, as described above, the mechanical chassis 35 on which the playing means is mounted is fixed to the main chassis 5, and thus to the housing 2, via the insulator 37 as a vibration isolating member. By doing so, almost no external vibrations are transmitted to the performance means including the optical pickup means, and smooth performance can be performed.

Next, the playing position, i.e. turntable 54
The clamping mechanism that clamps the disk 18 conveyed upward will be explained.

As shown in FIGS. 2, 3, and 15, a swinging member 58 is disposed on the mechanical chassis 35 and extends in the moving direction of the tray 10, that is, in the front-rear direction (the direction of arrow Y and the opposite direction). has been
Further, it is swingably attached to the mechanical chassis 35 via a support shaft 58a at its end (rear end) on the side in the tray storage direction. The support shaft 58a extends parallel to the rotating surface of the turntable 54, in this case in the left-right direction (the direction of arrow X and the opposite direction). Here, the swinging member 58 shown in FIG.
The position is referred to as the non-clamp position, and the position where the swinging member has swung downward by a predetermined angle is called the clamping position of the swinging member. The swinging member 58 swings between the clamped position and the unclamped position. Note that the swinging member 58 is biased toward the clamping position by a coil spring 59 arranged behind the support shaft 58a.

A disk-shaped pressing member 60 is attached to a spherical bearing member 60 at the front end, that is, the free end, of the swinging member 58.
It is rotatably mounted around its axis via a. This pressing member 60 cooperates with the turntable 54 to perform a disk clamping action. As is particularly clear from FIG. 15, the pressing member 60 is held such that a portion of the pressing member protrudes from the free end in the direction from the swinging support end of the swinging member 58 to the free end. has been done. In this case, about one-third of the diameter of the pressing member 60 is made to protrude from the free end. Also, as shown in FIG. 15, the swinging member 58 moves the peripheral edge of the surface of the pressing member 60 facing the turntable 54 into a pair of ends in a direction parallel to the support shaft 58a, that is, at both ends in the left-right direction. It is held by a claw 58b. This allows the pressing member 60 to rotate within a predetermined range in a plane perpendicular to the support shaft 58a (indicated by arrow R in FIG. 3).

As shown in FIGS. 3 and 15, the swinging portion of the swinging member 58 is provided with a lever member 63 extending parallel to the swinging member. Lever member 63
A shaft 63a extending parallel to the support shaft 58a of the swinging member 58 is protruded from the rear end of the lever member at a position approximately one-fourth of its total length.
When the shaft 63a engages with the engaging claw 58d formed in the lever member 63, the lever member 63
It is attached to 8. Therefore, the lever member 6
3 is rotatable around a shaft 63a. One end of the lever member 63, in this case the rear end, is pivoted to the support shaft 58a. More specifically, as shown in FIGS. 8 to 10, a bracket portion 64 is provided at the rear end of the mechanical chassis 35, extending substantially upwardly and having its tip bent forward. The rear end of the lever member 63 is pivotally engaged with a shaft 64a formed at the tip of the bracket portion to extend parallel to the support shaft 58a. More specifically, the rear end of the lever member 63 is formed with holding portions 63b and 63c that sandwich the shaft 64a of the bracket portion 64 in the vertical direction. On the other hand, the other rotating end of the lever member 63, that is, the front end 63d,
It is in contact with the peripheral edge of the surface of the pressing member 60 that faces the turntable 54 .

The swinging member 58 and the lever member 63 hold the pressing member 60 parallel to the rotating surface of the turntable 54 when the swinging member 58 is in the non-clamping position, and hold the pressing member 60 parallel to the rotating surface of the turntable 54 when the swinging member 58 is in the clamping position. It is designed to separate from the

As shown in FIG. 3, the swinging member 58 includes:
An engaging protrusion 63 formed on the front end of the lever member 63 when the swinging member reaches the clamping position.
A regulating portion 58e that engages with the lever member 58e and regulates rotation of the lever member is provided. Also, although this may be a little off-topic, the engaging pawl 58d formed on the swinging member 58 and engaging with the shaft 63a of the lever member 63 has flexibility. Furthermore, a gripping portion 63b formed on the lever member 63 and engaging with the shaft 64a of the bracket portion 64;
63c also has flexibility. That is, the pivoting center and the rear end of the lever member 63 are connected to the swinging member 5.
8 and the bracket portion 64 (therefore, the support shaft 58a
).

When the swinging member 58 reaches the clamp position, the front end 63d of the lever member 63 separates from the outer peripheral edge of the pressing member 60, but at the same time, the lever member 63 also becomes freely movable. As described above, the regulating portion 58e is provided, and the lever member 63
By elastically supporting the lever member, the lever member is restrained with a predetermined elastic force, and resonance etc. of the lever member due to external vibrations can be suppressed.
Further, when attaching the lever member 63 to the swinging member 58, it is only necessary to bend the above-mentioned engaging claw 58d and insert the lever member, so that the attaching work is simple. Also, when connecting the rear end portion of the lever member 63 and the shaft 64a of the bracket portion 64, the connection is completed simply by bending the clamping portions 63b, 63c and sandwiching the shaft 64a therebetween.

In the above-mentioned clamp mechanism, the pressing member 60 that performs a disk clamping action is moved at least parallel to the swinging support shaft 58a of the swinging member by the swinging member 58 for attaching and detaching the pressing member 60 to the turntable 54. The free end of the lever member 63 attached to the swinging member 58 is held at one point on the periphery of the surface facing the turntable, and the free end of the lever member 63 attached to the swinging member 58 comes into contact with the surface facing the turntable. is also held, and the swinging member 58 and lever member 63 push the pressing member 60 toward the turntable 5 when the swinging member is in the unclamped position.
While the swing member 58 is held parallel to the rotating surface of the rotating member 4, when the swing member 58 is in the clamp position, both of the swing members 58 are detached from the pressing member 60.

As described above, since the pressing member 60 is firmly held at at least three points by the swinging member 58 and the lever member 63 in the unclamped state,
Even if the entire disk player is tilted from the horizontal plane, the pressing member 60 is always kept parallel to the turntable rotating surface.
Therefore, the swinging stroke of the swinging member 58, which is necessary to avoid contact between the disc 18 on the turntable 54 and the pressing member 60 when the disc clamp is released, is kept small, and the disc player as a whole can be made thinner. has been done.

As is particularly clear from FIG.
A pair of supporting members 1 serving as a container according to the reciprocating movement of the
Lever member 30 for swinging 9 and 20
is engaged with the swinging member 58 at its other rotating end, that is, at its upper end. For details, see the swinging member 5
A linear cam portion 58g is formed on the lower surface of the lever member 8 along the tray moving direction (back and forth direction), and the upper end portion of the lever member 30 is slidably engaged with the linear cam portion. That is, the lever member 30 is rotated in the direction of arrow Q by the backward movement of the moving member 23 after the tray 10 has reached the storage position in the housing 2, and the swinging member 58 is swung toward the clamping position. It is designed to move.

Here, the upper end portion of the lever member 30, that is, the portion that engages with the linear cam portion 58g of the swinging member 58 is a roller member 30d. In this way, by providing the roller member 30d, the upper end portion of the lever member 30 and the linear cam portion 58g can smoothly slide against each other.

Further, even after the swinging member 58 reaches the clamping position, the lever member 30 rotates by a predetermined angle in the direction of the arrow Q, and the roller member 30d of the lever member 30 rotates by a predetermined angle.
is spaced apart from the linear cam portion 58g. With this configuration, the mechanical connection state between the playing means (described above) mounted on the mechanical chassis 35 together with the swinging member 58 and the moving member 23, which is a part of the disk transport mechanism, can be adjusted to suit the disk performance. The inside will be completely lifted. Therefore, there is no concern that external vibrations will be transmitted from the disk transport mechanism to the playing means, and smooth playing can be performed.

The lever member 30 described above, the swinging member 58,
The coil spring 59, the pressing member 60, the lever member 63 provided on the swinging member 58, and the peripheral small members related thereto move the disk 18, which is conveyed to the performance position, that is, onto the turntable 54. A clamp mechanism for clamping is configured.

As shown in FIGS. 3, 5, and 6, on the upper surface of the right rear end of the cover member 11, which is a component of the tray 10, there is a swinging member 58 of the clamp mechanism.
A roller member 65 that engages with the linear cam portion 58g when the tray protrudes outside the housing is provided. This roller member 65
acts as a holding means for holding the swinging member 58 in the non-clamped position.

As shown in FIG. 3, a detection switch 68 is fixedly provided below the front end of the subchassis 6. When the detection switch 68 is engaged with a protrusion (no reference numeral) protruding from a predetermined position of the moving member 23, the tray 10 is completely housed in the housing 2, the disk clamp is completed, and the tray 10 is
A signal is issued to detect the completion of protrusion from the housing. Also, as shown in Figure 10,
A detection switch 69 is provided on the lower surface of the mechanical chassis 35 for detecting that the carriage 42 carrying the optical pickup means has reached its movement limit position when a portion of the carriage 42 is engaged therewith.

Incidentally, detection signals emitted from each of the detection switches 68 and 69 described above are transmitted to a control section (not shown) provided within the housing 2. In addition, the motors 26 and 47 and the spindle motor 55 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 disc player having the above-mentioned configuration will be explained as shown in FIGS. 18 to 20.
The performance procedure will be briefly explained with reference to the figures.

First, as shown in FIG. 1, the disk 18 is fitted into the cylindrical recess 11a of the tray 10 protruding from the housing 2, and placed on the supporting members 19 and 20 (see FIG. 6), which are containers. place
It should be noted that the operation of protruding the disk carrying section consisting of the tray 10, supporting members 19, 20, etc. out of the housing is performed by following the completely reverse process of the storage operation described below, and therefore will not be described in detail.

After placing the disk 18, the housing 2
Press the loading switch of the switch group (not shown) provided on the front panel 3 of the computer.
Then, the motor 26 starts rotating, the gear 24 rotates, and the moving member 23 is driven backward. however,
For example, as illustrated in FIG.
3, the movable member 23 cannot move relative to the tray 10 including the slide base 12, and therefore the support member 19 and 20 is tray 1
Locked to 0. Therefore, the rotation of the gear 24 causes only the moving member 23 and the tray 10 to move rearward. As the tray 10 moves backward, the movable piece 33 rolls on the slide portion 6c of the sub-chassis 6 while being engaged with the second recess 23e.

When the tray 10 reaches the storage position in the housing 2, the front bent portion 12c of the slide base 12, which is a component of the tray 10, comes into contact with the front end of the sub chassis 6, resulting in the state shown in FIG. 16.
Note that FIG. 17 is a plan view of this state. 1st
As is clear from FIG. 6, at this time the first recess 6
d, the second recess 23e and the opening (no reference numeral) of the protrusion 12b are coaxially opposed to each other. Moving member 2
Since the rearward driving force is still being applied to the slide base 3, the front bent portion 12c of the slide base 12 comes into contact with the front end of the sub chassis 6, and the rearward movement of the slide base is stopped. , the movable piece 33 leaves the second recess 23e and moves to the first
It enters into the recess 6d. As a result, the tray 10 including the slide base 12 is locked with respect to the sub-chassis 6, and at the same time the tray 10 of the moving member 23 is locked.
The locked state with respect to 0 and therefore the locked state of the support members 19 and 20, which are containers, with respect to the tray 10 is released. In this way, only the moving member 23 continues to move backward, resulting in the states shown in FIGS. 18 and 19. That is, as only the movable member 23 moves backward, the lever member 30 rotates about the pin 30a, thereby causing the support member 10 carrying the disk 18 to move as shown in FIG.
and 20 swing. Therefore, the center hole 18a (shown in the first diagram) of the disk 18 fits into the tapered guide portion 54a of the turntable 54, and the disk 18
is placed on the turntable. Also, the second
As shown in FIG.
, and the disk 18 is rotatable together with the turntable 54.

On the other hand, as shown in FIG. 18, as the supporting members 19 and 20 swing downward, the linear cam portion 58 is attached to the roller member 30d of the lever member 30.
The swinging member 58 engaged at point g swings downward due to the biasing force of the coil spring 59, and the pressing member 60 provided at the free end of the swinging member is pressed against the upper surface of the disk 18. disk 18
is clamped.

When the moving member 23 reaches the backward movement limit position,
A protrusion (not shown) protruding from a predetermined position on the front end of the moving member engages with the detection switch 68, thereby operating the detection switch. The aforementioned control section (not shown) detects that the detection switch 68 is activated and a detection signal is issued, and that the tray 10 is being driven in the storage direction, and then controls the disk holding section including the tray. When the disk reaches the storage position in the housing 2, it is determined that the disk clamping is completed, and the motor 26 is stopped. In this state, disc performance is possible.

Here, if the listener notices that the disc 18 has been inserted incorrectly and stops the storage operation of the tray 10 by hand, or for some other reason, the tray 10
A case will be described in which an abnormal load is applied that prevents the housing from being housed in the housing 2.

If the storage operation of the tray 10, and hence the disk carrying section, is interrupted midway through, the detection switch 68 described above will not operate forever. The storage operation takes almost a certain amount of time,
The control section determines that the abnormal load has been applied if the detection switch 68 does not operate even after a certain period of time has passed since the motor 26 started rotating. In this case, the motor 26 is reversely operated to drive the tray 10 in the projecting direction.

When the loading of the disk 18 is completed without the above-mentioned abnormal load being applied, the spindle motor 55 rotates, and at the same time the motor 47 rotates, the carriage 42 (for example, see FIG. 10) begins to operate, and disk performance begins. .

When the performance ends and the detection switch 69 detects that the carriage 42 has reached its travel limit position, the carriage 42 and turntable 54 are stopped, and at the same time, the motor 26 begins to reverse operation. Therefore, as mentioned earlier, tray 1
0 and the supporting members 19 and 20 protrude out of the housing 2 by following a process completely opposite to that described above. When the tray 10 reaches the protruding position outside the housing 2, a protrusion (not shown) protruding from a predetermined position on the rear end of the moving member 23 activates the detection switch 68.
The detection switch operates by engaging with the switch. The control unit (described above) detects that the detection switch 68 has been operated and a detection signal has been issued, and that the tray 10 is being driven in the protruding direction. It is determined that the protruding position outside 2 has been reached and the motor 26 is stopped.

The disk is thus recovered.

Effects of the Invention As detailed above, in the clamp mechanism according to the present invention, the pressing member 60 cooperates with the turntable 54 to perform a disk clamping action, and the support shaft 58a extends parallel to the rotating surface of the turntable. a swinging member 58 that is swingably supported between a clamped position and a non-clamped position and holds the pressing member at its free end; A rotating end portion is provided on the swinging portion of the swinging member so as to be rotatable about a shaft 63a parallel to the support shaft. A lever member 63 is provided which is pivotally attached to the support shaft 58a and whose other rotating end can come into contact with the peripheral edge of the surface of the pressing member facing the turntable. When the swinging member is in the unclamped position, the pressing member is held parallel to the turntable rotating surface, and when the swinging member is in the clamping position, it is detached from the pressing member.

That is, in the clamp mechanism according to the present invention, the pressing member that performs the disk clamping action is moved at least in a direction parallel to the swinging support axis of the swinging member by the swinging member for attaching and detaching the pressing member to the turntable. The surfaces facing the turntable at both ends are held, and one point on the periphery of the surface facing the turntable is also held by abutting the free end of the lever member attached to the swinging member. , the swinging member and the lever member hold the pressing member parallel to the rotating surface of the turntable when the swinging member is in the unclamped position, while both are released from the pressing member when the swinging member is in the clamped position. This is how it is done.

In this way, since the pressing member is firmly held at at least three points by the swinging member and the lever member in the unclamped state, even if the entire disc player is placed in a state tilted from the horizontal plane, the turntable The parallel state of the pressing member to the rotating surface is always maintained.

Therefore, the swinging stroke of the swinging member required to avoid contact between the pressing member and the disc on the turntable when the disc clamp is released is small, and the disc player as a whole can be made thinner. -ing Further, since the lever member is essentially the only mechanism for maintaining the pressing member in a state parallel to the turntable rotating surface, cost reduction is also achieved.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the entire front loading disc player according to the present invention, and FIGS. 2 to 4 are plan views showing a part of the internal structure of the front loading disc player and including a partial cross section. , side view and front view, Figures 5 and 6
The figure is a plan view of the tray and its peripheral members, FIG. 7 is a sectional view related to FIG. 6, and FIGS. 8 to 10.
The figures are a plan view, a side sectional view, and a bottom view of the mechanical chassis and the equipment mounted thereon, and Figures 11a, b, 12, 13, and 14a to 14c are details of some of the equipment. 15 is a plan view including a partial cross section of the mechanical chassis and the clamp mechanism mounted thereon, FIGS. 16 to 20 are diagrams for explaining the operation of the front loading disc player, and FIG. 21 FIG. 2 is a diagram showing a conventional clamp mechanism. Explanation of symbols of main parts, 2...Housing, 3
...Front panel, 3a, 11b, 35a, 3
6a...opening, 5...main chassis, 6c...
...Slide part, 6...Sub chassis, 6a, 12
a...V groove, 6c...slide part, 6d...first
Recessed portion, 7... Pressing member, 7a, 7b, 49a, 4
9b...Protrusion, 7c...Slit, 9...Support, 10...Tray, 11...Cover member, 11
a... Cylindrical recess, 12... Slide base, 1
2b...Protrusion part, 12c...Front end bent part, 14...
...Retainer, 14a...First bearing member, 1
4b...Second bearing member, 15...Slide plate, 16...Decorative panel, 18...Disc, 18a...Center hole, 19, 20...Support member, 19a, 20a...Part, 19b, 20b
... Support part, 19c, 20c ... Tapered disk guide part, 19d, 20d ... Swing support shaft, 23
...Moving member, 23a... Rack part, 23b...
U-shaped recess, 23d...projection, 23e...second
Recessed portion, 24... Gear, 25, 47a, 47b...
Pulley, 26, 47...Motor, 26a...Small pulley, 27...Belt, 30...Lever member, 3
0a, 30b... Pin, 30d, 65... Roller member, 31, 59... Coil spring, 33...
...Movable piece, 35... Mechanical chassis, 36... Leg, 37... Insulator, 38... Column leg member, 38a... Flange, 39... Viscoelastic member, 42... Carriage, 42a, 42b... U
groove, 42c... protrusion, 43... guide shaft,
44...adjustment screw, 44a...slit, 44
b...screw head, 46...screw shaft,
49... Arm member, 49c... Tongue-shaped portion, 50
a, 50b...half nut, 51...retention member, 54...turntable, 54a...tapered guide portion, 55...spindle motor, 58
...Swinging member, 58a...Support shaft, 58b...
Claw, 58d...Engagement claw, 58e...Restriction part, 58
g... linear cam part, 60... pressing member, 60a
... Spherical bearing member, 63 ... Lever member,
63a, 64a... shaft, 63b, 63c... clamping part, 63d... front end part, 63e... engaging protrusion, 6
4... Bracket section, 68, 69... Detection switch.

Claims (1)

[Scope of Claims] 1. A pressing member that clamps a disk placed on a turntable in cooperation with the turntable, and a support shaft extending parallel to the rotating surface of the turntable, and a clamping position. a swinging member that is swingably supported between a non-clamped position and holds the pressing member at a free end;
The swinging member holds at least both ends of the pressing member facing the turntable in a direction parallel to the support shaft, and the swinging portion of the swinging member holds a surface facing the turntable at least in a direction parallel to the support shaft. a lever member that is rotatably provided at the lever member, one end of which is pivotally connected to the support shaft, and the other end of which can be brought into contact with a peripheral edge of a surface of the pressing member facing the turntable; The swinging member and the lever member hold the pressing member parallel to the rotating surface of the turntable when the swinging member is in the unclamped position, and hold the pressing member parallel to the rotating surface of the turntable when the swinging member is in the clamped position. A clamp mechanism characterized by being detachable from a member. 2. The swinging member is provided with a regulating part that engages with the other rotating end of the lever member to restrict the rotation of the lever member when the swinging member reaches the clamp position, and 2. The clamp mechanism according to claim 1, wherein the pivoting center portion of the lever member and the pivoting end portion are elastically attached to the swinging member and the support shaft.