JPH0710850U - Lifting mechanism - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent rattling of the gantry that is displaced toward and away from the pedestal. [Structure] In a compact disc reproducing device 22 having a so-called auto changer function, a cradle 2 having an inserting / ejecting means 28 for taking out / pushing in compact discs 26 stored in a stacked state in a magazine 25.
One end 40a is fixed to the pedestal 27, and the other end 40 is fixed to the base 55 of the lifting mechanism 21 that moves the 7 up and down in the direction of arrow 52.
a bias spring 40 to which b is fixed, and the bias spring 4
A pulley 42 that displaces the expansion / contraction direction of 0 in the direction of arrow 44 intersecting the direction of arrow 52 is provided. By this, the base 2
Even when 7 is closest to the gantry 55, the bias spring 40 directly applies a sufficient bias force to the gantry 27, so that rattling of the gantry 27 is suppressed and the operation of the gantry 27 is suppressed. It is possible to prevent defects and failures in advance.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention selectively ejects compact discs stacked in a magazine by vertically moving a mount equipped with an insertion / ejection mechanism, and loads the compact discs at a predetermined reproduction position on a turntable. The present invention relates to an elevating mechanism preferably implemented in an autochanger device.

[0002]

[Prior art]

 FIG. 6 is a side view schematically showing a compact disc reproducing apparatus 2 including a typical conventional lifting mechanism 1. This compact disc reproducing device 2 takes out / pushes compact discs 4 stacked and stored in a magazine 3 by an inserting / ejecting mechanism 19 such as a swing arm mounted on a pedestal 5 and at the same time The compact disc 4 loaded in the pedestal 5 is moved to and away from the base 6 in the direction of the arrow 7 by the elevating mechanism 1 so that the compact disc 4 is loaded at a predetermined loading position on the turntable 8. The device is a device for loading and reproducing the data, and thus selectively reproducing the compact disc 4 in the magazine 3.

The elevating mechanism 1 generally includes lever members 9 and 10, a bias spring 11, and one end portion 9 a of the lever member 9 slidably displaced in a direction of an arrow 12, and includes a motor and a worm gear. And a drive mechanism (not shown). The driving force from the motor or the like is transmitted to the one end portion 9a of the lever member 9 formed in a substantially L shape, and the sliding displacement is performed in the guide groove 6c formed in the base 6. A pin 13 which can be moved is erected, and the vicinity of the central portion 9b is fixed by a pin 14 to a rising piece 20 erected on the base 6 so as to be swingable. Furthermore, the other end 9c of the lever member 9 is swingably displaceably attached to one end 5a of the gantry 5 by a pin 15 and is also provided between the central portion 9b and the other end 9c. The pin 16 is fixed to the vicinity of the central portion 10b of the lever member 10 so as to be swingable. One end 10a of the lever member 10 is swingably attached to the other end 5b of the mount 5 by a pin 17, and the other end 10c is swingably displaceable to the support plate 12 by a pin 18. Also, it is mounted so that it can be slidably displaced.

Therefore, when the pin 13 is slidably displaced in the direction of the arrow 12 by the drive mechanism, the gantry 5 moves up and down in the direction of the arrow 7 and is housed in the magazine 3 at a desired housing position. The compact disc 4 can be taken out.

In the lifting mechanism 1 configured as described above, in a typical conventional technique, the bias spring 11 has one end 11 a fixed to one end 9 a of the lever member 9 and the other end 11 b thereof. It is fixed on the base 6 to one end 6b spaced from the one end 9a in the arrow 12a direction. In this way, rattling of the lifting mechanism 1 is prevented.

[0006]

[Problems to be solved by the device]

 Although the rattling caused by the lever members 9 and 10 of the lifting mechanism 1 can be suppressed in the above-described conventional technique, the pedestal 5 supported by these lever members 9 and 10 has the bias spring 11 of The action of the bias force is small, and thus rattling occurs between the lever members 9 and 10 and the gantry 5. Due to such rattling, particularly when the compact disc reproducing device 2 is used for a vehicle, there is a possibility that the elevator mechanism 1 may malfunction or be damaged due to vehicle body vibration or the like.

In order to directly apply the bias force of the bias spring 11 to the gantry 5, for example, between the one end 5a of the gantry 5 and the other end 6a of the base 6 facing the one end 5a. In the case where the bias spring 11 is stretched, the bias spring 11 contracts when the pedestal 5 is close to the base 6, and a sufficient bias force cannot be generated.

An object of the present invention is to provide a lifting mechanism that realizes stable operation of a gantry and can prevent malfunctions and failures.

[0009]

[Means for Solving the Problems]

 The present invention relates to an elevating mechanism that supports a base so that it can be displaced toward and away from a base, and a spring member whose one end is fixed to the base and a fixed position of the spring member facing the base. The other end of the spring member. The other end of the spring member is provided at a position and is configured to extend and contract the spring member and guide the other end of the spring member so as to extend in a direction crossing the approaching / separating direction. An elevating mechanism is characterized in that the parts are fixed on the base from the direction changing means with a space in the intersecting direction.

[0010]

[Action]

 According to the present invention, rattling is prevented in an elevating mechanism for displacing a stand such as a holder equipped with an insertion / ejection mechanism in a compact disc reproducing device having an automatic change function with respect to a base. One end of the spring member for generating a biasing force is fixed to the pedestal, and the other end of the spring member extends in the direction crossing the one end side through the direction changing means and is fixed to the base. To be done. The direction changing means is provided on the base at a position facing the position where the spring member is attached to the gantry, and is realized by a pulley or a reel and supports the spring member so that it can extend and contract. The other end of the spring member is extended by the direction changing means such that, for example, when one end of the spring member extends in the vertical direction, the other end of the spring member extends horizontally and is spaced apart from the direction changing means. It is fixed to the stand.

Therefore, even when the gantry is closest to the base, it is possible to directly apply a sufficient biasing force to the pedestal in the direction of approaching the base by the spring member. It is possible to prevent rattling and prevent malfunction or failure of the lifting mechanism.

[0012]

【Example】

 FIG. 1 is a perspective view of a compact disc reproducing device 22 having an elevating mechanism 21 according to an embodiment of the present invention, and FIG. 2 is a side view showing the compact disc reproducing device 22 in a simplified manner. This compact disc reproducing device 22 selectively ejects compact discs 26 placed on a tray 24 and stored in a magazine 25 in a stacked state by an inserting / ejecting means 28 on a pedestal 27 for reproduction. It has a so-called auto changer function that reduces the operator's complicated disk exchange operation.

As shown in FIG. 3, in the insertion / ejection means 28, the output from the arm motor 31 is transmitted to the rocking member 34 via the worm 32 and the reduction gear 33, and the rocking member 34 is moved. By swinging displacement from the state shown in (1) as shown in FIG. 3 (2), the hook 35 attached to the free end portion 34a is guided to the guide groove 36 formed in the mount 27. The disc 26 placed on the tray 24 in the magazine 25 is pulled out by the displacement caused by the displacement, and is held by the mount 27. Further, the disc 26 which has been reproduced is placed on the tray 24, and is pushed into the magazine 25 as shown in FIG. 3A to be stored in a predetermined storage position.

The pedestal 27 is supported so as to be vertically displaceable in the arrow 52 direction by a pair of elevating mechanisms 21 provided on both side portions 27 a and 27 b of the pedestal 27. The ascending / descending mechanism 21 is a drive mechanism such as a rack, a pinion gear, and a motor (not shown) that displaces the lever members 53, 54 and one end portion 53 a of the lever member 53 along a guide groove 56 formed on the base 55. 57 and a disc discriminating device 60 for discriminating whether or not the gantry 27 faces a desired disc storage position.

One end portion 53 a of the lever member 53 is slidable and displaceable on the guide groove 56 by a pin 61, and a central portion 53 b thereof rises on a rising piece 62 extending from a base 55. The pin 63 is swingably supported by the pin 63, and the other end 53c also swingably supports the mount 27 by the pin 64.

One end 54 a of the lever member 54 is swingably attached to the pedestal 27 by a pin 65, and a pin 66 near the central portion 54 b is swingably connected to the lever member 53. Further, the other end 54c is slidably and swingably supported on the rising piece 62 by a pin 67. Therefore, the one end portion 53a of the lever member 53 is displaced on the guide groove 56 by the drive mechanism 57, so that the gantry 27 is displaced up and down in the direction of the arrow 52.

A magazine holder 71 to which the magazine 25 is attached is also provided on the base 55. In this magazine holder 71, a detection member 72 of the disc discriminating apparatus 60 is erected so as to face the gantry 27 side. The disc discriminating device 60 is configured to include the detection member 72 and a photo sensor 73 attached to the mount 27 and realized by a pair of light emitting and receiving elements. The detection member 72 is provided with slits 75 corresponding to the respective disk storage positions in the magazine 25.

Therefore, when the desired disk is selected, the elevating mechanism 21 is driven, and the photosensor 73 counts the slits 75 in accordance with the displacement of the gantry 27 in the direction of the arrow 52 due to this, and the desired value is selected. When the count value corresponding to the storage position of the disk is reached, the elevating mechanism 21 is stopped, the insertion / ejection means 28 is driven, and the disk 26 is taken out. Then, the elevating mechanism 21 is driven again, the disk 26 is placed at a predetermined reproducing position on the turntable 23, and reproduction is performed. Further, after the disk 26 which has been reproduced is moved up and down again to the storage position by the elevating mechanism 21, it is pushed and stored in the magazine 25 by the inserting / ejecting means 28. In this way, the disc 26 can be replaced.

Further, in the present invention, the elevating mechanism 21 is provided with a bias spring 40 and a pulley 42. One end 40a of the bias spring 40 is fixed to a support column 39 that is erected on one side 27a of the gantry 27, and the other end 40b is a support column that is erected on one end 55b of the base 55. It is fixed at 41. A pulley 42, which is a direction changing means, is rotatably attached to the other end 55a of the base 55 so as to face the support column 39. The gap between the pulley 42 and the support column 41 is formed to be sufficiently longer than the length of the bias spring 40 in the contracted state, and therefore, from the support column 39 via the pulley 42 in the direction of the arrow 52a. The bias spring 40 stretched between the support columns 41 erected in the direction of arrow 44, which is perpendicular to the direction of arrow 52, always mounts the pedestal 27 to the base 55 indicated by the arrow 52a. Spring biased in the direction of proximity. Even when the pedestal 27 is closest to the base 55, a sufficient bias force can be exerted because the distance between the support column 41 and the pulley 42 is long.

Therefore, even when the compact disc reproducing device 22 is used for a vehicle, it is possible to prevent rattling of the gantry 27 due to vehicle body vibration, and prevent malfunction or failure of the gantry 27 in advance. You can

Although the bias spring 40 and the pulley 42 are provided on one side portion 27a of the mount 27 in the above-described embodiment, they may be provided on the other side portion 27b as another embodiment of the present invention. Alternatively, both sides 27a and 27b may be provided together.

Furthermore, as shown in the compact disc reproducing device 72 of FIGS. 4 and 5, a configuration regarding the bias spring 40 may be provided in the base 55. That is, in this embodiment, a recess 73 is formed in the vicinity of the center of one side portion 27a of the gantry 27, and the support column 39 is erected in the recess 73. Further, a pulley 42 is attached near the base end of the rising piece 62 in the base 55 so as to face the support pillar 39, and the support pillar 41 is erected at one end 55b in the base 55. .

As a result, there is no risk that the bias spring 40 will engage with external components, and since a bias force acts near the center of the gantry 27, a smooth operation can be realized. In this embodiment as well, the bias spring 40 and the pulley 42 may be provided on the other side portion 27b of the gantry 27, or on both side portions 27a and 27b.

Further, the present invention is suitable for a structure in which a space between the base and the base is narrow in a close state between the base and the base, such as an ascending / descending mechanism of a magnetic tape cassette in an in-vehicle magnetic tape reproducing apparatus. It can be carried out.

[0025]

[Effect of device]

 As described above, according to the present invention, one end of the spring member is fixed to the pedestal, and the other end of the spring member is mounted on the base with a sufficient distance in a direction intersecting with the direction in which the one end extends. Since it is fixed, even when the gantry is closest to the pedestal, the spring member can be extended and a sufficient bias force can be directly applied to the gantry, which causes rattling of the gantry. It is possible to prevent the occurrence of malfunctions and failures by preventing sticking.

[Brief description of drawings]

FIG. 1 is a perspective view of a compact disc reproducing device 22 including a lifting mechanism 21 according to an embodiment of the present invention.

FIG. 2 is a side view showing the compact disc reproducing device 22 in a simplified manner.

FIG. 3 is a plan view for explaining an inserting / ejecting operation of a disc 26 from a magazine 25 by an inserting / ejecting means 28.

FIG. 4 is a simplified side view showing a compact disc reproducing device 72 according to another embodiment of the present invention.

5 is a plan view of the compact disc reproducing device 72. FIG.

FIG. 6 is a side view schematically showing a compact disc reproducing apparatus 2 including a typical conventional lifting mechanism 1.

[Explanation of symbols]

 21 Lifting Mechanism 22, 72 Compact Disc Playback Device 25 Magazine 26 Compact Disc 27 Frame 40 Bias Spring 42 Pulley 53, 54 Lever Member 55 Base

Claims (1)

[Scope of utility model registration request] 1. An elevating mechanism that supports a pedestal so that it can be displaced toward and away from a base, a spring member having one end fixed to the gantry, and a fixed position of the spring member facing the pedestal. The other end of the spring member, which is attached to the position, and which includes a direction changing means for expanding and contracting the spring member and guiding the other end of the spring member so as to extend in a direction intersecting with the approaching / separating direction. An elevating mechanism, wherein the parts are fixed on the base from the direction changing means at intervals in the intersecting direction.