JPH08308696A - Low speed rotation device for rotary disc - Google Patents

Abstract

PURPOSE: To realize low speed steady rotation of a disc, high output rotation of a disc, and long life of a power source (cell). CONSTITUTION: A drive shaft 20 is positioned in adjacency of a rotary disc 23. To transmit the output of a motor 41 to the drive shaft 20, the drive shaft 20, an output shaft 42 of the motor 41 and a transmission mechanism 31 for both the shafts 20 and 42 are mutually combined. In relativity between the drive shaft 20 and the rotary disc 23 to receive the power transmission from the drive shaft 20, one or more of both are fallen down on the counterpart side by dead load to bring a transmission circumference face 22 and a passive circumference disc face 25 of the rotary disc 23 in mutually contact with each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a low-speed rotating device for a turntable having many uses such as display, display, teaching material, appreciation, decoration, article placement, toys, industrial, and many other applications. Regarding

[0002]

2. Description of the Related Art A low-speed rotary type turntable device rotates an item such as an exhibit placed on the turntable at a speed at which it can be visually recognized. As such a low-speed rotary type turntable device, the one schematically shown in FIG. 4 is sold by Kokusai Display Industry Co., Ltd. (this is described in the utility model registration application).

The turntable device illustrated in FIG. 4 is
A case 2 having a vertical bearing cylinder 1 inside, a turntable 4 having a rotating shaft 3 on the lower surface, a motor 6 having an output shaft 5, a leaf spring 7, a changeover switch 8, a dry battery 9, etc. ing. That is, the turntable 4 is rotatably supported on the case 2 by inserting the rotary shaft 3 into the bearing cylinder 1, and the motor 6 mounted in the case 2 via the leaf spring 7 has the output shaft 5 thereof. Is strongly contacted with the lower surface of the turntable 4. Besides, the dry battery 9 housed in the case 2 is electrically connected to the motor 6 through an electric circuit including the changeover switch 8, and the changeover switch 8 is attached to the outer surface of the case 2. Therefore, in the case of this turntable device, when the motor 6 is switched on, the rotation thereof is transmitted from the tip of the output shaft 5 to the turntable 4, and the turntable 4 rotates at a low speed.

In this type of turntable device, the first requirement is that the turntable rotates stably, and the second requirement is that the cordless type device consumes less battery power. It is possible to keep the table rotating as long as possible with one battery for a long time.

FIG. 4 shows the stable rotation of the turntable.
In the case of the device illustrated in FIG. 1, it is proposed that a high-viscosity agent (high-viscosity agent) is applied to the lower surface of the turntable 4 to increase the frictional resistance between the turntable 4 and the motor output shaft 5. Regarding the battery life, for example, when the turntable 4 is continuously rotated for 8 hours per day at a rotation speed of 13 to 6 rpm, the period until exhaustion of the AA dry battery (one) is 6 to 7. It is said to extend to a week. However, it is also noted that when the rotation speed of the turntable is reduced to 6 to 3 rpm, the effective use period of the dry battery is halved. Therefore, the turntable device of FIG. 4 is currently on the market as being usable within the range of such characteristics.

[0006]

However, in the case of the turntable device shown in FIG. 4 (hereinafter referred to as conventional device), there is much room for improvement in terms of stable rotation of the turntable and effective use period of the dry battery. I have left.

One of them is that the rotation of the motor output shaft 5 is not reliably transmitted to the turntable 4. This is because the output shaft 5 rotating at high speed has a small diameter of 2 mmφ,
This is because the tip of the output shaft and the turntable 4 are in slight point contact with each other, and a slip occurs between them. As a slip prevention measure, in the case of the conventional device, the high-viscosity agent is applied to the turntable 4 side, but even if such a measure is taken, slips will inevitably occur at a constant rate. In addition, the smooth rotation of the output shaft 5 may be hindered by the resistance of the highly viscous agent.

The other is that a long battery life cannot be expected. Obviously, the longer the battery life, the better. However, in the conventional device, the rotation speed of the turntable 4 is 13 to 6 r.
The battery lasts only 6 to 7 weeks at pm, and
If the rotation speed is reduced to 6 to 3 rpm by inserting a series resistor, the life of the battery is further reduced. This is because the current flowing through the motor 6 is as large as about 15 mA.

Still another is that it is not possible to realize the low speed rotation of about 1 to 2 rpm required for this type of turntable. By the way, in the case of the conventional device, even if a resistor is interposed, the number of revolutions remains at 3 rpm and 2 rp.
It cannot fall below the rotation speed of m.

Another one is that when an article weighing 1 kg or more is placed on the turntable 4, the above-mentioned slip phenomenon frequently occurs. This is because if the turntable 4 is slightly tilted due to the weight of the placed article, the turntable 4
This is because the pressing force of the motor output shaft 5 with respect to is weakened. In order to avoid this, the center of gravity of the article to be placed on the turntable 4 and the center of the turntable 4 should be aligned. However, such usage is troublesome and hinders usability.

SUMMARY OF THE INVENTION In view of the above technical problems, the present invention has a low speed for a rotary disk capable of achieving stable low speed rotation of the rotary disk, high output rotation of the rotary disk, and long life of a power supply (battery). It is intended to provide a rotating device.

[0012]

The low-speed rotating device for a rotary disk according to the present invention is characterized by the following means for solving the problems in order to achieve the intended object. That is, an electric motor, a reduction gear transmission mechanism, a drive shaft having a transmission circumferential surface, a rotary disk having a passive circumferential surface, a rotary shaft attached to the rotary disk and protruding from the back surface thereof, and a rotary shaft. And a rotating shaft supported by the bearing so that the turntable is rotatable, and the drive shaft is arranged adjacent to the turntable and the output of the electric motor The drive shaft, the output shaft of the motor, and the transmission mechanism extending over both shafts for transmitting the power to the drive shaft, and the relative relationship between the drive shaft and the turntable that receives power from the drive shaft. In one of the above, one or more of them fall down to the other side by their own weight, and the transmission circumferential surface of the drive shaft and the passive circumferential surface of the rotary disk are in contact with each other.

The various embodiments described above are as follows. The power source for the electric motor is a battery, and the power source and the electric motor are electrically connected. The turntable has any of horizontal, vertical, and inclined postures, and members related to the turntable correspond to the turntable in the posture. A transmission unit including a drive shaft, an electric motor, and a transmission mechanism is swingably supported via a fulcrum member, and the transmission unit falls down to the rotary disc side by its own weight, and the drive shaft's transmission circumferential surface and the rotary disc passive circle. The peripheral surface is in contact with each other. A roller having a transmission circumferential surface is attached to the outer circumference of the drive shaft, and the transmission circumferential surface of the roller and the passive circumferential surface of the rotary disk are in contact with each other.

[0014]

In the case of the low-speed rotating device for a rotating disk according to the present invention, the electric motor is switched on, and the rotation of the electric motor is changed to the output shaft of the electric motor.
Transmission mechanism for deceleration → Drive shaft → Transmission circumferential surface → Passive circumferential surface →
Communicate like a turntable. In this case, the rotation from the electric motor to the turntable is decelerated by the deceleration transmission mechanism, and is further decelerated by the outer diameter ratio between the transmission circumferential surface having the small diameter and the passive circumferential surface having the large diameter. Therefore, the turntable rotates at an extremely low speed. Moreover, the transmission circumferential surface and the passive circumferential surface are in sufficient contact with each other in a line contact state, and the drive shaft and the turntable are pressed against each other by their own weight so as to hold them. Stable transmission of rotation to the board side.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A low-speed rotating device for a rotary disk according to the present invention will be described based on the illustrated embodiments and matters related thereto.

1 and 2 show an embodiment of the device of the present invention. In this illustrated example, 11 is a case, 20 is a drive shaft, 23 is a turntable, 31 is a transmission mechanism for deceleration, 41 is an electric motor, 43 is a power source for the electric motor, 44 is a switch, 51
Indicate transmission units, respectively.

The case 11 is a box body 12 having a known shape.
The lid (bottom lid) 14 and the lid (bottom lid) 14 are assembled by a known means so as to be disassembled. An opening 13 is formed on the upper surface of the box body 12. On the lid 14, a bearing stand 16 having a holding hole 15 in the upper portion, a pivot bearing type fulcrum portion 17, a shaft support piece 18, a curved power source holding portion 19, and the like are provided. In this case, the bearing stand 16 and the fulcrum portion 1
7 is provided in a substantially central portion on the lid 14 and is provided with a holding hole 15
And the fulcrum portion 17 coincide with each other, the shaft support piece 18 is on one side of the lid body 14 (left side in FIG. 2), and the power source holding portion 19 is on the other side of the lid body 14 (see FIG. 2). Right side). The box 12 and the lid 14 are made of any material such as plastic (including FRP), metal, ceramic, wood, and a composite material of these. However, the power supply holding unit 1
In the case of No. 9, it can be said that a material having a restoring property such as a spring is desirable regardless of whether it is made of metal or plastic.

The drive shaft 20 has a roller 21 attached to its end, and the outer peripheral surface of the roller 21 is a transmission circumferential surface 22. The drive shaft 20 is made of a well-known material such as metal, and the roller 21 is typically made of rubber, plastic, or the like having a large friction resistance.

The turntable 23 has a circular plate 24 having an outer diameter slightly smaller than this on the back side, and the outer peripheral surface of the circular plate 24 is a passive circumferential surface 25. The turntable 23 also includes a rotary shaft 26 that projects from the back surface (specifically, the back surface of the circular plate 24). Turntable 23 and circular plate 24
Is made of the same material as that described for the box body 12 and the lid body 14, and the rotary shaft 26 is made of a known material such as metal.

As the transmission mechanism 31 for deceleration, a gear type is used in the illustrated example. This includes a pinion (small gear) 32, a gear (gear) 33, a pinion (small gear) 34, a gear (gear) 35, and the like.
1 is attached to the output shaft 42, the intermediate shaft 36, and the drive shaft 20. As each pinion and each gear for this transmission mechanism,
Although mainly made of plastic, a metal pinion gear or the like can also be used.

The electric motor 41 comprises a commercially available small motor,
It has an output shaft 42. It is desirable that the electric motor 41 is small and consumes less power. As a specific example of such an electric motor 41, a motor manufactured by Mabuchi Motor Co., Ltd. can be cited.

As the electric power source 43 for the electric motor, any known battery such as a dry battery, a storage battery (eg, a primary battery, a secondary battery, etc.), a mercury battery, a solar battery, which is represented by an alkaline battery, can be arbitrarily adopted. In the illustrated example, a single 1 type alkaline dry battery is adopted as the power source 43.

The switch 44 is a motor 41 and a power source 43.
It is for turning on / off a circuit including a signal, and this is also a commercially available product.

The transmission unit 51 includes the drive shaft 20, the transmission mechanism 31, and the electric motor 41 described above, which mainly include a plurality of mounting plates 52 to 54 and a plurality of connecting rods 55. Are combined as follows. Electric motor 4
The reference numeral 1 is interposed between the upper and middle (two) mounting plates 52 and 53 and fixed to the intermediate mounting plate 53, and the output shaft 42 thereof penetrates the intermediate mounting plate 53. The pinion 32 is the electric motor 4
1 is attached to the output shaft 42. The intermediate shaft 36 is rotatably installed across the middle and lower (two) mounting plates 53 and 54. The gear 33 and the pinion 34 are attached to the intermediate shaft 36, and the gear 33 meshes with the pinion 32. The drive shaft 20 passes through the upper, middle, and lower (three) mounting plates 52 to 54 and is rotatably attached to these mounting plates, and the roller 21 at the upper end thereof is attached to the upper mounting plate 5.
2 projecting upward. The gear 35 is attached to the lower part of the drive shaft 20 between the middle and lower (two) mounting plates 53 and 54, and meshes with the pinion 34. Further, the connecting rods 55 connect the mounting plates 52 to 54 to each other so as to hold the mounting plates 52 to 54 at predetermined intervals. As an example, when each connecting rod 55 is made of a bolt, a nut forming a pair with the connecting rod 55 is also used to connect the mounting plates 52 to 54 to each other.

In this case, a spacer pipe having a length corresponding to the distance between the two mounting plates 52 and 53 and the distance between the two mounting plates 53 and 54 is covered on the outer circumference of the intermediate portion of each connecting rod 55 in the longitudinal direction. Sometimes As another example, when the connecting rods 55 are metal rods, these are attached (or welded) to the mounting plates 52 to 54. In addition, a shaft support piece 56 is provided on the back surface of the lower mounting plate 54. As the mounting plates 54 and the fasteners in the transmission unit 51, those made of plastic or metal are arbitrarily adopted.

In FIGS. 1 and 2, the turntable 23 is a case 1
When assembled to the No. 1, the rotating shaft 26 protruding from the back surface of the rotating disk 23 is passed through the holding hole 15 of the bearing stand 16, and the lower end of the rotating shaft 26 is inserted into the fulcrum portion 17. In such a case, the rotary shaft 26 has the bearing stand 16 and the fulcrum portion 1
Since it is supported by 7, the turntable 23 becomes rotatable. Further, in this assembly mode, the turntable 23 is on the box body 12, and the circular plate 24 on the backside of the turntable is the opening 13 of the box body 12.
It fits inside.

In the case of the transmission unit 51, the roller 21 is arranged above and the shaft support piece 56 is arranged at a predetermined position in the case 11, and the shaft support piece 18 and the mounting plate 5 on the lid 14 side are arranged.
The shaft support piece 56 on the fourth side is connected by a pin-type fulcrum shaft 57 and assembled in the case 11. The transmission unit 51 assembled in the case 11 inclines toward the turntable 23 side because the swing fulcrum (fulcrum shaft 57) does not coincide with the position of the center of gravity. Therefore, the transmission circumferential surface 22 of the roller 21 is the passive circumferential surface 2 of the circular plate 24 as shown in FIG.
5 always shows contact.

As is apparent from FIG. 2, the power supply holding portion 17, the electric motor 41, and the switch 44 are electrically connected to each other through an electric wire (lead wire) 58 and other electric parts, as is well known. A power source (battery) 43 is removably loaded in the power source holding unit 17. Therefore, when the switch 44 is turned on, the electric motor 41 is energized, and when the switch 44 is turned off, the electric motor 41 is turned on.
Is de-energized.

In the case of the low-speed rotating device for a turntable illustrated in FIGS. 1 and 2, a predetermined article 61 is placed on the turntable 23 for display, display, teaching material, appreciation, decoration, article. Used for mounting, toys, industrial, and others. When the switch 44 is turned on during use of these, the electric motor 41 rotates.
The rotation of the electric motor 41 is as follows: output shaft 42 → pinion 32 → gear 33 → intermediate shaft 36 → pinion 34 → gear 35.
Since it is transmitted to the drive shaft 20 via the transmission mechanism 31, the drive shaft 20 rotates. Hereinafter, the rotation of the drive shaft 20 is caused by the roller 2
Since the power is transmitted from the transmission circumferential surface 22 of 1 to the passive circumferential surface 25 of the circular plate 24 to the turntable 23 as in the case of the turntable 23, the article 61 rotates at extremely low speed together with the turntable 23.

In the low-speed rotating device for a turntable illustrated in FIGS. 1 and 2, the electric motor 41 is replaced by the above-mentioned motor (commercially available product),
The power source 43 is set to 1.5 V for a single 1 type alkaline battery and 1 kg
Article 61 of the above is put on the turntable 23, and this is set to about 1 rpm.
When rotated for 8 hours (continuously for 8 hours per day), the power supply 43 could be used for about half a year or longer. This is because the current flowing through the electric motor 41 is as small as 5 mA, and the power consumption per unit time is suppressed.

FIG. 3 shows another embodiment of the device of the present invention. In this low-speed rotating device for a turntable, the turntable 23 has an upright shape. That is, in the low-speed rotating device for a rotary disk of FIGS. 1 and 2, the rotary disk 23 is horizontal and the rotary shaft 26 and the drive shaft 2 are
Although 0 is vertical, in the low speed rotating device for a rotary disk of FIG. 3, the rotary disk 23 is vertical and the rotary shaft 26 and the drive shaft 20 are horizontal. Correspondingly, the posture, position, structure, etc. of other parts and members have also changed. However, the low-speed rotating device for the turntable of FIG.
Is substantially the same as

In the embodiment of FIG.
In order to hold it on the surface of the turntable 23, an attracting plate 62 such as a plate magnet or a sheet magnet is attached, and on the surface of the article 61, an attracted piece 63 such as an iron piece is attached. . On the contrary, the attracted plate is the turntable 23.
The adsorption piece may be attached to the surface of the article 61 and attached to the surface of the article 61.

In the embodiment of FIG. 3, the rotary shaft 2 is relatively rotated.
6 is in the upper position and the drive shaft 20 is in the lower position, a means by which the passive circumferential surface 25 on the turntable 23 side contacts the transmission circumferential surface 22 on the drive shaft 20 side by its own weight, that is, the rotary shaft. Two
A shaft support means is provided so that 6 can move up and down.

The low-speed rotating device for the turntable of FIG.
When the switch 44 is turned on to rotate the turntable 23 holding the electric motor 41, the rotation of the electric motor 41 changes from the output shaft 42 to the pinion 32 to the gear 33 to the intermediate shaft 36 to the pinion 34 to the gear 35 up to the drive shaft 20. The rotation of the drive shaft 20 is transmitted to the rotary disk 23 such as the transmission circumferential surface 22 of the roller 21 → the circular plate 24 → the passive circumferential surface 25 → the rotary disk 23, so that the article 61 and the rotary disk 23 are super-low speed. To rotate.

As an embodiment of the type opposite to that of FIGS. 1 and 2, the rotary shaft 26 is swingably supported, the drive shaft 20 is vertically supported, and the rotary disk 23 is inclined toward the drive shaft 20 side. Some are. Corresponding to this, the postures, positions, structures, etc. of the other parts / members related to the turntable 23 also change as obvious. Such a low-speed rotating device for a turntable also has a basic configuration substantially the same as that shown in FIGS. 1 to 3 except that the turntable 23 is inclined and the drive shaft 20 is upright. According to. Therefore, the turntable 23 in this embodiment also rotates at an ultra-low speed as described above. In this case, the suction method using the suction piece and the suction piece described in FIG. 3 may be adopted as needed.

In another embodiment, both the drive shaft 20 and the rotary shaft 26 are swingably supported, and the drive shaft 20 and the rotary disk 23 are in contact with each other so as to lean against each other under their own weight. When both 20 and the rotary shaft 26 are inclined, only one of them leans toward the other.
Such a low speed rotating device for a turntable is also manufactured according to the contents described above.

As the deceleration transmission mechanism 31 of each of the above-described embodiments, a chain transmission mechanism, a belt transmission mechanism or the like may be adopted instead of the gear transmission mechanism described above. When the roller 21 is omitted from the drive shaft 20, a part of the outer peripheral surface of the drive shaft 20 is used as the transmission circumferential surface 22, and such a transmission circumferential surface 22 is a passive circumference of the turntable 23. Contact surface 25. Furthermore, the rotary plate 23 to the circular plate 24
When is omitted, the outer peripheral surface of the rotary disk 23 is used as the passive circumferential surface 25, and the passive circumferential surface 25 contacts the transmission circumferential surface 22 of the drive shaft 20. The surface of the transmission circumferential surface 22 and / or the passive circumferential surface 25 may be provided with a non-slip shape such as a satin pattern, a mesh pattern, and a fine and numerous stripe pattern. The surfaces of the transmission circumferential surface 22 and / or the passive circumferential surface 25 may be tapered surfaces. When the drive shaft 20 and / or the rotary shaft 26 is swingably supported, these swing fulcrums are set at appropriate portions according to various modes. A ball (small ball) may be interposed between the end of the rotary shaft 26 (the lower end surface of the rotary shaft 26 in FIG. 1) and the fulcrum 17. Other than this, various bearings are used to smooth the rotation of the drive shaft 20 and the rotary shaft 26. In addition, an AC power source such as a commercial power source may be used as the power source of the electric motor 41. In such a case, in order to switch the battery power source to the commercial power source, a well-known adapter jack and well-known electric parts related thereto are provided.

[0038]

The low-speed rotating device for a rotary disk according to the present invention has the following effects.

In the device of the present invention, a transmission mechanism for deceleration,
When the rotation of the electric motor is transmitted to the turntable via the drive shaft and the like, the rotation is not only reduced by the transmission mechanism for reduction, but also the transmission circumferential surface with the small diameter and the passive circumferential surface with the large diameter are used. Since the speed is further reduced according to the outer diameter ratio of, the super-low speed rotation of the turntable can be realized. Therefore, the device of the present invention is useful when the object is rotated at an extremely low speed by using the turntable.

The turntable and the drive shaft are in sufficient contact with each other via the transmission circumferential surface and the passive circumferential surface, and the drive shaft and the turntable are opposed to each other by their own weight in order to maintain this contact state. Since they are pressed against each other, there is almost no slippage between the drive shaft and the rotary disk in rotation transmission. Therefore, in the case of the device of the present invention, the rotation of the drive shaft is reliably transmitted to the rotary disk, and the rotary disk stably rotates at high output. Further, it is not necessary to take troublesome measures as a slip prevention measure.

In the case of the device of the present invention, the current flowing through the electric motor is extremely small and the power consumption per unit time is suppressed, so that the economical efficiency of the power source is significantly improved. Especially in the case of a portable device that uses a battery as a power source, it can be expected to be used for a long period of half a year or more in continuous 8 hours of rotation per day.
The number of troublesome battery replacements can be extremely reduced, and convenience in use can be further enhanced.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a low speed rotating device for a turntable according to the present invention.

FIG. 2 is a cutaway front view of the low speed rotation device for a rotary disk illustrated in FIG.

FIG. 3 is a perspective view showing another embodiment of the low-speed rotating device for a turntable according to the present invention.

FIG. 4 is a cutaway schematic front view of a conventional low speed rotating device for a turntable.

[Explanation of symbols]

 11 Case 12 Box 13 Opening 14 Lid 15 Holding Hole 16 Bearing Stand 17 Support Point 18 Shaft Supporting Piece 19 Power Supply Holding 20 Drive Shaft 21 Roller 22 Transmission Circumferential Surface 23 Rotating Disk 24 Circular Plate 25 Passive Circumferential Surface 26 Rotating shaft 31 Transmission mechanism 32 Pinion 33 Gear 34 Pinion 35 Gear 36 Intermediate shaft 41 Electric motor 42 Output shaft 43 Power supply 44 Switch 51 Transmission unit 52 Mounting plate 53 Mounting plate 54 Mounting plate 55 Connecting rod 56 Shaft support piece 57 Support shaft 58 Electric wire 61 Goods

Claims (5)

[Claims] 1. An electric motor, a transmission mechanism for deceleration, a drive shaft having a transmission circumferential surface, and a turntable having a passive circumferential surface.
A rotary shaft attached to the rotary disk and projecting from the back surface thereof; and a bearing for the rotary shaft; and the rotary shaft being supported by the bearing so that the rotary disk is rotatable, and The drive shaft is disposed adjacent to the turntable, and the drive shaft, the output shaft of the electric motor, and the transmission mechanism across these shafts are mutually combined for transmitting the output of the electric motor to the drive shaft; and , In the relative relationship between the drive shaft and the turntable that receives power from the drive shaft, one or more of these two falls down to the other side due to its own weight, and the drive circumferential surface of the drive shaft and the passive circumferential surface of the turntable A low-speed rotating device for a turntable, characterized in that and are in contact with each other. 2. The low-speed rotating device for a rotating disk according to claim 1, wherein the power source for the electric motor is a battery, and the power source and the electric motor are electrically connected. 3. The low-speed rotating device for a rotary disk according to claim 1, wherein the rotary disk has any of horizontal, vertical, and tilted postures, and a member associated with the rotary disk corresponds to the rotary disk in the posture. 4. A transmission unit including a drive shaft, an electric motor, and a transmission mechanism is swingably supported via a fulcrum member, and the transmission unit collapses by its own weight toward the turntable to form a transmission circumferential surface of the drive shaft. The low-speed rotating device for a rotary disk according to claim 1, wherein the passive circular surface of the rotary disk is in contact with each other. 5. The rotation according to claim 1, wherein a roller having a transmission circumferential surface is mounted on the outer periphery of the drive shaft, and the transmission circumferential surface of the roller and the passive circumferential surface of the rotary disk are in contact with each other. Low speed rotating device for board.