JPH07226009A - Lifting device - Google Patents

Abstract

PURPOSE:To increase the degree of freedom in designing a CD reproducing device having a lifting device by miniaturizing this lifting device. CONSTITUTION:Followers 51 to 54 erected from both side walls 49, 50 of a stand 27 are fitted through guide grooves 57 to 60 of regulating plates 55, 56 into cam grooves 39b to 42b of cam members 39 to 42. These cam grooves 39b to 42b are composed of holding planes perpendicular to the axial lines of the cam members 39 to 42 and the guide planes displaced in the axial line direction according to the displacement in the circumferential direction. The stand 27 is vertically displaced by a height DELTAh equal to the pitch DELTAd of a partition plate 25a of a housing member 25 for each once rotation of the cam members 339 to 42 by a driving mechanism 68. As a result, the CD reproducing device 22 which has the lifting device 21 occupying a small area and has an automatic changing function improved in positioning accuracy and enhanced in the degree of freedom in designing is realized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevating device preferably used to realize a so-called automatic change function by vertically moving a reproducing portion of a compact disc reproducing device.

[0002]

2. Description of the Related Art FIG. 4 shows a typical prior art lifting device 1
FIG. 2 is an exploded perspective view schematically showing a compact disc (hereinafter abbreviated as “CD”) reproducing device 2 provided with. C
The D playback device 2 is generally configured by housing a pedestal 4 in a housing 3. Inside the housing 3, a plurality of C
Storage members 6 for mounting the D5 on the trays and storing them in a stacked state are mounted.

At the time of reproducing the CD 5, the tray is taken into the pedestal 4 by an insertion / ejection mechanism 7 including a swing arm provided on the pedestal 4. The CD 4 placed on the tray by slightly lowering the gantry 4 in the drawing.
Is a turntable 8 provided on the lower side of the gantry 4 in the figure.
It is placed at a predetermined position above and is rotatably clamped by a clamper 10 attached to the swing member 9. The reproduced CD 5 is stored in the storage member 6 by being pushed again by the insertion / ejection mechanism 7 after the gantry 4 is slightly raised upward in the drawing and placed on the tray.

The lifting device 1 includes a horizontal moving member 11a, which is movable along the side wall 3a, 3b of the frame 4 and the housing 3.
11b. One horizontal moving member 11a is provided with stepped elongated holes 13a and 13b with which the convex portions 12a and 12b provided on the one side wall 4a of the gantry 4 engage, and the other horizontal moving member 11b is provided with Similarly, a stepped elongated hole 13c with which the convex portion 12c provided on the other side wall 4b of the pedestal 4 engages is provided.

One of the horizontal moving members 11a is a motor 14
Is transmitted to the rack 17 provided on the horizontal moving member 11a via the worm 15 and the reduction gear 16, so that it can be moved along the side wall 3a. It is transmitted to the other horizontal moving member 11b via 18.

The connecting lever 18 is swingably displaceable with its center portion 18a as a fulcrum, and is connected to the horizontal moving members 11a and 1a.
The movement directions of 1b are opposite to each other. Therefore, the elongated holes 13a, 13b, and 13c are provided so that the slopes of the stairs are opposite to each other, so that the elevating member 4 is horizontally supported by the convex portions 12a to 12c. In this state, the CD 5 can be moved up and down in the stacking direction of the CD 5.

As described above, by constructing the CD reproducing device 2 including the elevating device 1 and the insertion / ejection mechanism 7, any CD 5 stored in the storage member 6 is selectively taken out and reproduced. The auto change function is realized.

[0008]

DISCLOSURE OF INVENTION Problems to be Solved by the Invention In the lifting device 1 configured as described above, a CD stored in the storage member 6
When the displacement amount of the gantry 4 increases with the increase in the number of sheets 5, the long holes 13 provided in the horizontal moving members 11a and 11b.
a to 13c must be lengthened, and the horizontal moving member 11
The strength of a and 11b is reduced, and bending or the like is likely to occur. Therefore, not only is the positioning accuracy reduced, but
The smoothness of the horizontal movement of the horizontal moving members 11a and 11b is lost.

In order to solve the above problems, if the elongated holes 13a to 13c are to be shortened, the elongated holes 13
Since the slopes of the inclined portions a to 13c are large, a large driving force is required to raise the gantry 4 along the inclination, while a large impact force is exerted when the gantry 4 is lowered to adversely affect the mechanism included in the gantry 4. May be caused.

Further, the horizontal moving members 11a, 11b.
Move horizontally over the respective side walls 3a, 3b, so that it is not possible to insert the side walls 3a, 3b into the side walls 3a, 3b to form a connection terminal, etc. Be restricted.

An object of the present invention is to provide an elevating device which occupies a small area, has a high degree of freedom in design, and enables smooth elevating displacement.

[0012]

SUMMARY OF THE INVENTION The present invention is a lifting device for supporting a member so that it can be displaced toward and away from a base, and is formed in a cylindrical shape, and has a holding surface perpendicular to the axis on its outer peripheral surface. A cam groove having a guide surface that is displaced in the axial direction according to the displacement in the circumferential direction is formed, and a plurality of cam members arranged on both side portions of the member and erected on both side portions of the member, A restriction plate corresponding to each cam member, in which guide grooves extending in the direction of the approaching / separating displacement are formed, and projecting from both sides of the member, each guide member of each cam member is inserted through the guide groove of the restriction plate. It is an elevating device including a follower individually fitted in a cam groove, and a drive mechanism for rotationally driving the cam members in conjunction with each other.

In the drive mechanism of the present invention, the first gear fixed to one end of the cam member, the interlocking shaft formed with screw screws meshing with the first gear at both ends, and fixed to the interlocking shaft. And a motor having a third gear that meshes with the second gear fixed to the output shaft.

Furthermore, the cam groove of the present invention is characterized in that steps are formed at both ends of the guide surface thereof.

[0015]

According to the present invention, in the lifting device for supporting the member so that it can be displaced toward and away from the base, it is formed in a cylindrical shape, and has a holding surface perpendicular to the axis and a circumferential surface in the outer peripheral surface thereof. A plurality of cam members each having a cam groove having a guide surface that is displaced in the axial direction according to the displacement are arranged on both sides of the member. The followers projecting from both sides of the member are inserted into the guide grooves formed in the regulation plate and extending in the direction of the proximity / separation displacement, and are individually fitted into the grooves of the cam members. In this state, when the cam members are interlocked and rotationally driven by the drive mechanism, the members are displaced in the approaching / separating directions while maintaining the horizontal state. The displacement direction of the member is restricted only to the direction of the proximity / separation displacement by the follower fitting into the cam groove via the guide groove.

Therefore, since a member that greatly displaces, such as the horizontal moving member in the prior art described above, is not provided, it is possible to increase the degree of freedom in designing, for example, a compact disc reproducing device configured using the elevating device. You can Further, by forming the cam groove corresponding to the long hole in the conventional technique on the outer peripheral surface of the columnar cam member, the expanded length of the cam groove can be increased,
The positioning accuracy of the member can be improved.

Further, preferably, the drive mechanism has a first gear fixed to one end of a cam member and the first gear at both ends.
An interlocking shaft formed with a screw screw that meshes with a gear,
It is configured to include a second gear fixed to the interlocking shaft and a motor having a third gear meshing with the second gear fixed to the output shaft. The cam member arranged on one side of the member and the cam member arranged on the other side are interlocked by an interlocking shaft that transmits the output of the motor, and are rotationally driven at the same rotational speed. .

Therefore, since a member for swinging displacement, such as the connecting lever in the above-mentioned prior art, is not provided, it is possible to realize a lifting device having a small occupied area.

Further preferably, in the cam groove,
Steps are formed at both ends of the guide surface. Therefore,
The follower does not easily stop on the guide surface, but stops on the holding surface. Therefore, the positioning accuracy of the member can be improved.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a lift device 21 according to a first embodiment of the present invention.
FIG. 3 is an exploded perspective view schematically showing a CD reproducing device 22 including the. In the housing 23 of the CD player 22, a plurality of CDs 24 are mounted on a tray 26, and a storage member 25 that stores the CDs 24 in a stacked state is mounted. The CD reproducing device 22 selectively takes in the tray 26 in which the CD 24 is placed in the storage member 25 into the pedestal 27 by the insertion / ejection mechanism 28 and reproduces the CD 24 so that the operator replaces the CD 24. It has a so-called auto changer mechanism that can save time and effort. Five CDs 24 can be stored in the storage member 25 in this embodiment.

When the CD 24 is reproduced, the insertion / ejection mechanism 28 formed on the mount 27, which is a member,
The tray 26 at a predetermined storage position in the storage member 25 is taken out and taken into the pedestal 27. In the insertion / ejection mechanism 28, the output from the arm motor 29 is transmitted to the arm 32 via the worm 30 and the reduction gear 31, and the one end portion 32 a of the arm 32 is guided along the guide groove 33 to be swingably displaced. As a result, a hook (not shown) attached to the one end portion 32a of the arm is inserted into the tray 2 from inside the storage member 25.
Withdraw 6.

When the tray 26 is thus taken into the pedestal 27, the CD 2 placed on the tray 26 is loaded.
4 is loaded at a predetermined position on the turntable 34 which is inserted through the through hole 26a formed in the central portion of the tray 26 when the gantry 27 is slightly lowered in the drawing. Further, the swing member 35 provided inside the mount 27 is displaced closer to the turntable 34, so that the CD 24 can be freely rotated by the clamper 36 attached to the swing member 35 and the turntable 34. Supported and ready for regeneration.

When the reproduction is completed, the swinging member 35 is displaced away from the turntable 34 to release the support state of the CD 24, and the pedestal 27 is slightly raised upward in the figure, so that the CD 24 is placed on the tray 26. Being placed,
The tray 26 is again pushed into a predetermined storage position in the storage member 25 by the insertion / ejection mechanism 28 and stored.

The lifting device 21 includes the first gears 39a to 42a.
From the cam members 39 to 42 including the second gear 46, the interlocking shaft 38 including the second gear 46, the third gear 45 fixed to the drive motor 37 and the output shaft 62 of the motor 37, and the side walls 49 and 50 of the pedestal 27. It is configured to include the followers 51 to 54 that project. The output of the drive motor 37 rotationally drives the third gear 45 via the output shaft 62, and rotationally drives the second gear 46 meshing with the third gear 45, thereby rotationally driving the interlocking shaft 38.

The driving force is generated by the screw screws 47 and 48 formed at both ends of the interlocking shaft 38.
9a and 40a, respectively, and the cam members 39 and 4 are transmitted.
0 is rotationally driven in the direction of the arrow indicated by reference numeral 66. This driving force is further transmitted from the first gears 39a, 40a to the first gears 41a, 42a via the transmission gears 43, 44, respectively, and the cam member 4 is moved in the direction of the arrow 66.
1, 42 are rotationally driven.

First gears 39a-4 of the cam members 39-42
On the outer surface above 2a, there are cam grooves 39b-4
2b is engraved. Since the cam members 39 to 42 have the same structure, a development view of the cam member 39 is shown in FIG. 2 as a representative. The cam groove 39b includes a holding surface 39c that is perpendicular to the axis of the cam member 39 and a guide surface 39d that is displaced in the axial direction along with the displacement in the circumferential direction.
According to the number of trays 26 that can be stored in No. 5, in this embodiment, the trays are formed in five steps. The pitch Δh between the holding surfaces is equal to the arrangement pitch Δd of the partition plates 25a of the storage member 25, and is designed to rise or fall by the height Δh when the cam member 39 makes one rotation.

On one side wall 49 of the pedestal 27, followers 51 and 53 are provided so as to correspond to the cam members 39 and 41, respectively, and on the other side wall 50, followers 52 corresponding to the cam members 40 and 42 are provided. , 54 are respectively projected. The restricting plates 55 and 56, which are erected adjacent to the one side wall 49 and the other side wall 50, respectively, have directions 63 that approach and depart from the base 69 corresponding to the followers 51, 53 and 52, 54. A pair of guide grooves 57, 59 and 58, 60 extending in the respective directions are formed.

When the motor 37 is driven, the third gear 45 fixed to the output shaft 62 is rotationally driven in the arrow direction indicated by reference numeral 64, and the second gear 46 meshing with the third gear 45 is formed. It is rotationally driven in the arrow direction indicated by reference numeral 65, and further, the interlocking shaft 38 to which the second gear 46 is fixed is rotationally driven in the arrow 65 direction.

The screw screws 47 and 48 engraved on the interlocking shaft 38 mesh with the first gears 39a and 40a, respectively, and rotate the first gears 39a and 40a in the arrow direction indicated by reference numeral 66. Drive, and thereby the cam member 3
9 and 40 are rotationally driven in the direction of the arrow 66. Transmission gears 43, 44 meshing with the first gears 39a, 40a
Is a first gear meshing with the transmission gears 43, 44 when it is driven to rotate in the arrow direction indicated by reference numeral 67.
The gears 41a and 42a are rotationally driven in the direction of the arrow 66,
The cam members 41 and 42 are rotationally driven in the direction of the arrow 66.

The pedestal 27 has the guide grooves 57 to 6 as described above.
The followers 51 to 54 having 0 inserted therein are fitted into the cam grooves 39b to 42b formed in the cam members 39 to 42, and the pedestal 2
7 is held in the housing 23 while being kept horizontal. When the cam members 39 to 42 are rotationally driven in this manner, the gantry 27 tries to be displaced following the cam grooves 39b to 42b, and at this time, the followers 51 to 54 are inserted through the guide grooves 57 to 60. Thus, the displacement direction of the gantry 27 is restricted only to the approaching / separating direction 63.

Therefore, as described above, each cam member 39-
When 42 is driven in the direction of arrow 66, the pedestal 27
Can be displaced and driven in a direction away from the base 69. Further, when the motor 37 is rotationally driven in the direction opposite to the direction of the arrow 66, the gantry 27 is displaced and driven in the direction approaching the base 69.

As described above, in this embodiment, the cam grooves 39b to 4 into which the followers 51 to 54 projecting from the mount 27 are fitted.
2b is formed on the outer peripheral surface of each of the cylindrical cam members 39 to 42 arranged on both sides of the pedestal 27, so that there is no member having a large displacement amount such as the horizontal moving member described in the section of the prior art. The degree of freedom in designing the CD reproducing device 22 can be increased. Further, since the expanded length of the cam grooves 39b to 42b can be made long, the positioning accuracy of the gantry 27 can be improved.

Furthermore, the drive mechanism 68 includes a motor 37.
Is transmitted to the cam members 39 and 40 arranged on both sides 49 and 50 of the pedestal 27 through the screw screws 47 and 48 engraved on both ends of the interlocking shaft 38. The size can be reduced, and the area occupied in the CD player 22 can be reduced.

FIG. 3 shows a cam groove 39 of the second embodiment of the present invention.
It is a development view of the cam member 39f in which e is engraved. In the cam groove 39e of this embodiment, the cam groove 39e of the first embodiment is used.
Steps 39g and 39h are formed at both ends of the guide surface 39d of b. When the cam member 39f is driven to rotate in the direction of arrow 66, a step 39g is formed near the boundary where the holding surface 39c transitions to the guide surface 39d, and the follower 51 in the cam groove 39c moves to the guide surface 39d. It has a structure that is hard to enter. Also, from the guide surface 39d to the holding surface 39
A step 39h is formed in the vicinity of the boundary transitioning to c, and the structure is such that the follower 51 on the guide surface 39d easily escapes to the holding surface 39c.

Similarly, when the cam member 39f is driven to rotate in the direction opposite to the arrow 66, it is difficult for the step 39h to enter the guide surface 39d from the holding surface 39c, and the guide surface 39d to the holding surface 39c. Is easy to enter due to the step 39g.

As described above, in this embodiment, the follower 51 has a structure in which it is hard to stop in the middle of the guide surface 39d, so that the positioning accuracy of the gantry 27 can be improved.

Incidentally, in the above-mentioned embodiment, the pedestal 27
However, the storage member 25 may be displaced up and down by forming a follower on both side walls of the storage member 25. Further, the lifting mechanism 68 according to the present invention includes a C
Not only the D reproducing device 22 but also a magnetic tape reproducing device, a mini disk reproducing device, or the like is suitably used.

[0038]

As described above, according to the present invention, the followers projecting from both sides of the member are inserted into the cam grooves through the guide grooves, and in this state, the cam members are rotationally driven by the drive mechanism. By doing so, the member can be displaced in the direction of displacement toward and away from the base while maintaining the horizontal state. Therefore, it is not necessary to provide a member that greatly displaces like the horizontally moving member described in the prior art, and the degree of freedom in designing, for example, a compact disc reproducing device configured using the elevating device can be increased.

Further, since the cam groove is formed on the outer peripheral surface of the columnar cam member, it is possible to extend the development length thereof and improve the positioning accuracy of the member.

Further, preferably, since each cam member is driven in conjunction with each other by a screw screw formed on the interlocking shaft, it is not necessary to provide a swingable member such as a connecting lever described in the prior art. It is possible to realize a lifting device having a small occupied area.

Further preferably, since steps are formed at both ends of the guide surface in the cam groove, the follower is less likely to stop at the guide surface, and positioning accuracy can be improved.

[Brief description of drawings]

FIG. 1 is a C equipped with a lifting device 21 according to a first embodiment of the present invention.
It is a disassembled perspective view which simplifies and shows the D reproducing apparatus 22.

FIG. 2 is a development view of a cam member 39.

FIG. 3 is a development view of a cam member 39f according to a second embodiment of the present invention.

FIG. 4 is an exploded perspective view showing a simplified CD reproducing device 2 including a typical conventional lifting device 1.

[Explanation of symbols]

 21 Lifting device 24 CD 25 Storage member 26 Tray 27 Frame 28 Insertion / ejection mechanism 34 Turntable 39-42, 39f Cam member 39a-42a First gear 39b-42b, 39e Cam groove 39c Holding surface 39d Guide surface 39g, 39h Step 43 , 44 transmission gear 45 third gear 46 second gear 47, 48 screw screw 51-54 follower 55, 56 regulating plate 57-60 guide groove 68 drive mechanism 69 base

Claims (3)

[Claims] 1. An elevating device for supporting a member so that it can be displaced toward and away from a base, and is formed in a cylindrical shape, and has a holding surface perpendicular to the axis line on its outer peripheral surface and a displacement in the circumferential direction. A cam groove having a guide surface that is displaced in the axial direction is formed, and a plurality of cam members arranged on both sides of the member, and standing on both sides of the member, corresponding to each of the cam members, A regulation plate having guide grooves extending in the direction of displacement toward and away from each other, and projecting from both sides of the member, inserted through the guide grooves of the regulation plate and individually fitted into each cam groove of each cam member. An elevating device including a follower and a drive mechanism that rotationally drives the cam members in conjunction with each other. 2. The drive mechanism includes: a first gear fixed to one end of a cam member; an interlocking shaft formed with screw screws meshing with the first gear at both ends; and fixed to the interlocking shaft. The lifting device according to claim 1, further comprising a second gear and a motor having a third gear meshed with the second gear and fixed to an output shaft. 3. The elevating device according to claim 1, wherein the cam groove has steps formed at both ends of a guide surface thereof.