JPH0522918U - Article drive - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide an article drive device for driving an article in a linear direction by driving the driven section while minimizing the vibration transmitted from the drive section to the driven section. A male screw portion 3 is formed on an outer peripheral portion of a screw shaft 2 connected to an output shaft of a stepping motor 4, and a moving member 6 is screwed onto the male screw portion 3.
On the other hand, the guide member 12 holds the lens 10 and is movable in a linear direction on the moving pin 8.
A first columnar magnetized portion 16 is provided at the lower end of the moving member 6, and a first magnetized portion 16 is provided at the upper end of the guide member 12 so as to be spaced apart on both sides in the moving direction of the lens 10. Second magnetizing portions 18A, 18A that generate a repulsive force between the first and second magnets 16 are provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an article driving device for driving an article such as a focusing lens of a VTR camera in a linear direction. More specifically, it is a structure in which vibration of a driving section (actuator) is hard to be transmitted to a driven section. The invention relates to an article driving device.

[0002]

[Prior Art]

 As a device (for auto focus) that drives a focusing lens of a VTR camera in the optical axis direction, devices such as those shown in FIGS. 8 and 9 are conventionally known. This device includes a stepping motor 4 in which a screw shaft 2 having an external thread portion 3 formed on the outer periphery is connected to an output shaft, and a moving member screwed onto the screw shaft 2 and prevented from rotating around its axis. 6 and a guide member 12 movably provided on a moving pin 8 and having a lens 10 mounted therein.

A prismatic engagement portion 6 a is vertically provided at a lower portion of the moving member 6, and a substantially U-shaped engagement portion 12 a is provided at an upper portion of the guide member 12. Then, the engaging portion 6a and the engaging portion 12a are fitted and fixed to each other, the moving member 6 and the guide member 12 are integrally coupled, and the lens 10 is rotated by the forward and reverse directions by the rotation of the stepping motor 4. It is designed to move forward and backward in the m direction.

[0004]

[Problems to be solved by the device]

 In the device as shown in FIGS. 8 and 9, the vibration of the stepping motor 4 driven intermittently is transmitted from the screw shaft 2 to the guide member 12 via the moving member 6 and the engaging portions 6a and 12a. There was a problem that vibration sound entered from the microphone built into the VTR camera and became noise.

In order to prevent this, as shown in FIG. 10, there is a device in which a rubber damper 14 is interposed between the coupling portion between the engaging portion 6a and the engaging portion 12a. Even in this case, there is a problem in that the vibration of the stepping motor 4 is not sufficiently absorbed and vibration noise is generated.

The present invention has been made under the background as described above, and drives the driven part while minimizing the vibration transmitted from the driving part (actuator) to the driven part, and An object is to provide an article driving device that drives in a linear direction.

[0007]

[Means for Solving the Problems]

 According to a first aspect of the present invention, a screw shaft that is rotatably supported around an axis line, is connected to an output shaft of a motor, and has a male screw portion formed on an outer periphery, and is screwed to the screw shaft. A first magnetizing part is provided on one of the moving member and the guide member, the moving member being prevented from rotating around the axis, and the guide member for movably supporting the article in the linear direction. Is provided on the other side of the moving member or the guide member so as to be spaced apart from each other on both sides of the first magnetized portion in the article movement direction, and a repulsive force is generated between the first magnetized portion and the first magnetized portion. It is characterized in that a second magnetizing portion is provided.

According to a second aspect of the present invention, the screw shaft is rotatably supported around the axis line, is connected to the output shaft of the motor, and has a male screw portion formed on the outer periphery thereof, and the screw shaft is screwed to the screw shaft. The moving member is provided with a guide member for movably supporting the article in a linear direction, and the first member is attached to one of the moving member and the guide member. A magnetic portion is provided, and the other end of the moving member or the guide member is arranged such that its tip is slightly separated from the tip of the first magnetized portion in the direction orthogonal to the moving direction of the article. It is characterized in that a suction portion that is provided and that generates a suction force between the first magnetized portion is provided.

The attracting portion may be configured by using a permanent magnet having a magnetic pole characteristic opposite to that of the first magnetizing portion, or may be configured by using a non-magnetized ferromagnetic material such as iron. ..

According to a third aspect of the present invention, the screw shaft is rotatably supported around the axis line, is connected to the output shaft of the motor, and has a male screw portion formed on the outer periphery thereof, and the screw shaft is screwed to the screw shaft. And a guide member for movably supporting the article in a straight line direction. The moving member is provided with a first magnetizing portion, and The guide member has a distal end that is arranged slightly separated from the distal end of the first magnetized portion in the direction orthogonal to the moving direction of the article, and It is characterized in that a second magnetizing portion for generating an attractive force is provided between them.

[0011]

[Action]

 In the article driving device according to claim 1, the screw shaft is rotationally driven in the forward and reverse directions by the rotation of the motor in the forward and reverse directions, and the movement of the screw shaft is caused by the moving member screwed to the screw shaft. Converted to linear motion. Then, the movement of the moving member is transmitted to the guide member via the magnetic repulsive force of the first magnetized portion and the second magnetized portion, so that the article moves in a linear direction (a linear direction parallel to the axis of the screw shaft). ) Is driven. At this time, the first magnetized portion and the second magnetized portion are not always in contact with each other, and magnetic forces repelling each other act elastically between these magnetized portions. There is. The elastic force absorbs the vibration of the moving member caused by the vibration of the motor, the vibration of the guide member is minimized, and the generation of vibration noise is also prevented.

In the article driving device according to the second aspect, the screw shaft is rotationally driven in the forward and reverse directions by the rotation of the motor in the forward and reverse directions, and the movement of the screw shaft is screwed into the screw shaft. It is converted into linear motion by the moving member. Then, the movement of the moving member is transmitted to the guide member via the magnetic attraction force of the first magnetizing portion and the attraction portion, and the article is driven in the linear direction (the linear direction parallel to the axis of the screw shaft). At this time, the first magnetized portion and the attracting portion are not always in contact with each other, and the magnetic forces attracting each other elastically act between them. This elastic force absorbs the vibration of the moving member caused by the vibration of the motor, the vibration of the guide member is suppressed to a minimum, and the generation of vibration noise is also prevented.

In the article driving apparatus according to the third aspect, the screw shaft is rotationally driven in the forward and reverse directions by the rotation of the motor in the forward and reverse directions, and the movement of the screw shaft is screwed into the screw shaft. It is converted into linear motion by the moving member. Then, the movement of the moving member is transmitted to the guide member via the magnetic attraction force of the first magnetized portion and the second magnetized portion, so that the article moves in the linear direction (the linear direction parallel to the axis of the screw shaft). Driven. At this time, the first magnetized portion and the attracting portion are not always in contact with each other, and the magnetic forces attracting each other elastically act between them. This elastic force absorbs the vibration of the moving member caused by the vibration of the motor, minimizes the vibration of the guide member, and prevents the generation of vibration noise, as in the article driving device according to the second aspect. It

[0014]

【Example】

 An embodiment of the present invention (an example in which the present invention is applied to driving a focusing lens of a VTR camera in the optical axis direction) will be described below with reference to the accompanying drawings.

First, an embodiment of the invention according to claim 1 will be described. The same components as those of the conventional example described above are designated by the same reference numerals, and the description thereof will be omitted.

1 and 2 show an article driving apparatus according to an embodiment of the invention as set forth in claim 1. As shown in FIG. 1, the article driving device in the present embodiment is characterized by the structure of the part that transmits the power of the moving device 6 and the guide member 12. That is, the prism-shaped first magnetizing portion 16 is formed at the lower end of the moving member 6.

The first magnetizing portion 16 is slidably fitted along a shaft 17 arranged in parallel with the axis of the screw shaft 2 so that the moving member 6 can move along the axis. Rotation around is restricted.

A magnetizing portion 18 having a substantially U-shape when viewed from a direction orthogonal to the moving direction of the lens 10 is formed on the upper end portion of the guide member 12, and is located on both sides of the magnetizing portion 18. The tip portions 18A, 18A form a second magnetized portion. The U-shaped opening of the magnetized portion 18 is formed wider than the magnetized portion 16 in the moving direction of the lens 10, and the magnetized portion 16 is attached to the magnetized portion 18 (balanced state). In the above, the width w of the gap formed between the magnetized portion 16 in the moving direction of the lens 10 and the magnetized portions 18A on both sides of the magnetized portion 16 is such that the both magnetized portions 16 when the lens 10 is driven. , 18A are not in contact with each other, and the response sensitivity of the guide member 12 to the movement of the moving member 6 is preferable.

The magnetized portions 16 and 18 are integrally formed of a ferromagnetic material. As shown in FIG. 2, the magnetized portion 16 has a tip end side portion as an N pole and a base end side portion as an S pole. The magnetized portion 18 has N poles on the front end side portions (U-shaped portions) on both sides thereof and S poles on the rear end side portion. As a material of the magnetized portions 16 and 18, a resin magnetic body is preferable from the viewpoints of magnetizing and easiness of integral molding, but a magnetized material such as ferrite or metal can also be used.

In the article driving apparatus configured as described above, the screw shaft 2 is rotationally driven in the forward and reverse directions by the rotation of the stepping motor 4 in the forward and reverse directions, and the movement of the screw shaft 2 causes the screw shaft 2 to move in the forward and reverse directions. The moving member 6 screwed together converts the movement into a linear movement (direction of optical axis m). Then, the linear movement of the moving member 6 is transmitted to the guide member 12 via the magnetizing portion 16 and the magnetizing portion 18, and the lens 10 is driven in the linear direction.

At this time, the magnetized portion 16 and the magnetized portion 18 are not in contact with each other, and a magnetic force is generated between the magnetized portions 16 and 18 in a reciprocal direction in the moving direction of the lens 10. is doing.

When the moving member 6 moves, the force of the magnetized portion 16 to press and move the magnetized portion 18 is at a position where the magnetized portion 16 maintains a balance with the magnetized portion 18 (in the case of the present embodiment, Moves elastically when displaced from the position shown in FIG. The elastic force absorbs the vibration of the moving member 6 caused by the vibration of the stepping motor 4, the vibration of the guide member 12 is suppressed to the minimum, and the vibration noise is also suppressed.

In the above example, the magnetized portion 18 has the entire front end portion (U-shaped portion) on both sides thereof as the N pole and the rear end portion as the S pole. May be In the figure, only the tip side portions 18A, 18A on both sides of the magnetized portion 18 are N poles, and the base portion connecting these tip side portions is an S pole.

With such a configuration, in the moving direction of the lens 10, the repulsive force between the magnetizing portions 16 and 18A is maintained while maintaining the vertical direction (direction indicated by arrow I or arrow II in FIG. 3). In the above, the attraction force can be generated between the tip side portion (N pole) of the magnetized portion 16 and the base portion (S pole) of the magnetized portion 18, and the vibration of the guide member 12 can be more effectively exerted. Can be prevented.

Further, as shown in FIG. 4, when viewed in a direction orthogonal to the moving direction of the lens 10, the magnetized portion 20 provided on the upper end portion of the guide member 12 is formed into a prismatic shape, and the lower end portion of the moving member 6 is formed. The magnetized portion 22 provided in the above may be formed in a U-shape. The magnetized part 20 is magnetized so that the front end side (the side close to the moving member 6) is the N pole and the base end side part is the S pole, and the magnetized part 22 is the tip side (the guide member 12 side) coil. The entire character portion is magnetized as N pole and the base end side portion is magnetized as S pole. In this case, the magnetized portion 20 forms a first magnetized portion, and the tip portions 22A and 22A on both sides of the magnetized portion 22 form a second magnetized portion.

With such a configuration, there is an advantage that the magnetizing unit 20 that moves integrally with the lens 10 can be downsized, and the driving unit of the VTR camera can be downsized.

Further, as shown in FIG. 5, a prismatic magnetized portion (corresponding to the first magnetized portion) 24 is provided at the lower end of the moving member 6, and the magnetized portion is provided at the upper end of the guide member 12. It is also possible to provide four rectangular parallelepiped magnetized portions (corresponding to second magnetized portions) 26, 28, 30 and 32 so as to surround the side surface of the tip end portion of 24. The front end side portion of the magnetized portion 24 is an N pole and the base end side portion thereof is an S pole. The four magnetized portions 26, 28, 30, 32 are the front end side portion (N pole) of the magnetized portion 24. ) Is the north pole and the opposite side is the south pole.

With such a configuration, the magnetized portion 24 not only receives repulsive force in the article moving direction from the magnetized portions 26 and 28 on both sides, but also in a direction orthogonal to the article moving direction (arrow II I in FIG. 5). Alternatively, a repulsive force (in the direction indicated by the arrow IV) is received from the magnetized portions 30 and 32 on both sides, whereby the moving member 6 is prevented from rotating around its axis. Therefore, in the case of such a structure, it is not necessary to pass the shaft 17 arranged in parallel with the axis of the screw shaft 2 through the magnetized portion provided on the moving member 6 as in the above-described embodiments. ..

Similarly, as shown in FIG. 6, a columnar magnetized portion (corresponding to the first magnetized portion) 34 is provided at the lower end of the moving member 6, and a half cylinder is provided at the upper end of the guide member 12. Two magnetized portions (corresponding to second magnetized portions) 36 and 38 may be provided. The magnetized portion 34 has an N pole on the tip side and an S pole on the base end side, and the two magnetized sections 36 and 38 face the tip side portion (N pole) of the magnetized section 34. The part on the side is the north pole, and the part on the opposite side is the south pole.

Even with such a configuration, the magnetizing portion 34 not only receives repulsive force in the article moving direction from the magnetizing portions 36 and 38 on both sides, but also repulsive force in a direction orthogonal (intersecting) to the article moving direction. Since it is received from the magnetized portions 36 and 38 on both sides, it is not necessary to pass the shaft 17 arranged in parallel with the axis of the screw shaft 2 through the magnetized portion 34 as in the case of FIG.

Next, referring to FIG. 7 to FIG. 9, an embodiment of the invention according to claim 2 or claim 3 (an example applied to the driving of the focusing lens of the VTR camera in the optical axis direction) will be described. explain. The same components as those of the invention described in claim 1 described above are designated by the same reference numerals, and the description thereof will be omitted.

In the above-described embodiment according to the invention according to claim 1, the repulsive force of magnetic force is used. However, in the invention according to claims 2 to 3, as shown in FIG. Uses power.

In the figure, a prismatic magnetized portion (corresponding to the first magnetized portion) 40 is provided at the lower end of the moving member 6, and a prismatic magnetized portion (attractor) is provided at the upper end of the guide member 12. Or equivalent to the second magnetizing portion).

The magnetizing portion 40 has an N pole on the tip side and an S pole on the base end side, and the shaft 17 disposed parallel to the axis of the screw shaft 2 is provided on the base side portion. Is inserted, whereby the movement member 6 is prevented from rotating around the axis.

The magnetized portion 42 has an S pole on the front end side and an N pole on the rear end side. The tip of the magnetized portion 42 and the tip of the magnetized portion 40 are slightly separated from each other in the direction orthogonal to the article moving direction (the direction indicated by the arrow V or the arrow VI in FIG. 7).

Also in the article driving device having such a configuration, the magnetized portion 40 and the magnetized portion 42 are not in contact with each other, and the magnetic attraction force is elastic between the magnetized portion 40 and the magnetized portion 42. As described above, the vibration of the moving member 6 is not directly transmitted to the guide member 12, so that the vibration is minimized and the vibration noise is suppressed. ..

The configurations of the first magnetized portion and the second magnetized portion (attracting portion) are not limited to those shown in FIG. 7, and may be, for example, the configuration shown in FIG. In the figure, a rectangular parallelepiped magnetized portion 44 (corresponding to the first magnetized portion) is provided at the lower end of the moving member 6, and a rectangular parallelepiped magnetized portion (second magnetized portion) is provided at the upper end of the guide member 12. (Corresponding to the suction part or suction part).

The magnetizing portion 44 is magnetized so that one side (left side in FIG. 8) 44a in the article moving direction is an S pole and the other side (right side in FIG. 8) 44b is an N pole. The magnetizing portion 46 is magnetized so that one side (the left side in FIG. 8) 46a in the moving direction of the article is the N pole and the other side (the right side in FIG. 8) 46b is the S pole. The tip of the magnetized portion 44 and the tip of the magnetized portion 46 are slightly separated from each other in the direction orthogonal to the article moving direction (the direction indicated by arrow VII or arrow VIII in FIG. 7).

Also in the article driving device having such a configuration, the magnetized portion 44 and the magnetized portion 46 are not in contact with each other, and the magnetic attraction force is elastic between the magnetized portion 44 and the magnetized portion 46. As described above with reference to FIG. 7, the vibration of the moving member 6 is not directly transmitted to the guide member 12, so that the vibration is minimized and the vibration noise is generated. It can be suppressed. Further, in the case of the present embodiment, as compared with the case of FIG. 7, two magnetic flux flows in different directions are formed between the magnetized portion 44 and the magnetized portion 46, so that in the case of FIG. In comparison, the vibration of the guide member 12 can be suppressed more effectively.

Further, it is also possible to have a configuration as shown in FIG. In the figure, a magnetized portion (corresponding to the first magnetized portion) 48 having a U-shape in side view is provided at the lower end of the moving member 6, and a yoke having a U-shape in side view (suction) is provided at the upper end of the guide member 12. (Corresponding to the section) 50 is provided.

The magnetizing portion 48 is magnetized so that one side (left side in FIG. 8) 48a in the article moving direction is an N pole and the other side (right side in FIG. 8) 48b is an S pole. The yoke 50 is made of a non-magnetized ferromagnetic material such as iron, cobalt, nickel or the like. The tip of the magnetized portion 48 and the tip of the yoke 50 are slightly separated from each other in the direction orthogonal to the article moving direction (the direction indicated by the arrow IX or the arrow X in FIG. 9).

Also in the article driving device having such a configuration, the magnetized portion 48 and the yoke 50 are not in contact with each other, and the magnetic attraction force elastically acts between the magnetized portion 48 and the yoke 50. Therefore, similarly to the above-described embodiments of FIGS. 7 and 8, the vibration of the moving member 6 is not directly transmitted to the guide member 12, the vibration is suppressed to the minimum, and the vibration noise is also suppressed. .. It should be understood that the same effect can be obtained even if the yoke 50 is provided at the lower end of the moving member 6 and the magnetized portion 48 is provided at the upper end of the guide member 12.

[0043]

[Effect of the device]

 According to the article driving device of claim 1, a screw shaft that is rotatably supported around an axis, is coupled to an output shaft of a motor, and has a male screw portion formed on an outer periphery thereof; And a guide member for movably supporting the article in a linear direction, and one of the moving member or the guide member is A first magnetizing portion is provided, and the other one of the moving member and the guide member is arranged on both sides of the first magnetizing portion in the article moving direction so as to be spaced apart from each other. Since a second magnetizing part that generates a repulsive force is provided between and, the screw shaft is rotationally driven in the forward and reverse directions by the rotation of the motor in the forward and reverse directions, and the rotational movement of the screw shaft in the forward and reverse directions is performed. It is converted to linear motion by the moving member, Transmitted to the guide member through the first magnetized portion and the magnetic repulsive force of the second magnetization portion, thereby driving the article in a linear direction. The first magnetized portion and the second magnetized portion are not in contact with each other, and the movement of the moving member is elastically transmitted to the guide member via the magnetic repulsive force, so that the elastic force absorbs the vibration. It Therefore, unlike the conventional case, the slight vibration of the moving member is not directly transmitted to the guide member, the generation of vibration is minimized, and the generation of vibration noise is also suppressed.

According to the article driving device of claim 2, a screw shaft supported rotatably around the axis, coupled to the output shaft of the motor, and having a male screw portion formed on the outer periphery, One of the moving member and the guide member is provided with a moving member screwed onto the screw shaft and prevented from rotating around the axis, and a guide member that movably supports the article in a linear direction. Is provided with a first magnetizing part, and the other end of the moving member or the guide member has a tip end in a direction orthogonal to the moving direction of the article, and the tip end of the first magnetizing part is provided. Since the suction part is provided slightly apart from the first magnetizing part and generates a suction force between the first magnetizing part and the first magnetizing part, rotation of the motor in the forward and reverse directions causes the screw shaft to move in the normal direction. It is driven to rotate in the opposite direction, and The rotational movement in the direction is converted into a linear movement by the moving member and transmitted to the guide member via the magnetic attraction force of the first magnetizing portion and the attraction portion, whereby the article can be driven in the linear direction. Since the first magnetizing part and the attracting part are not in contact with each other and the movement of the moving member is elastically transmitted to the guide member via the magnetic attracting force, the elastic force absorbs the vibration, which is different from the conventional case. Since the slight vibration of the moving member is not directly transmitted to the guide member, the generation of vibration is minimized and the generation of vibration noise is also suppressed.

According to another aspect of the present invention, there is provided a screw shaft that is rotatably supported about an axis, is coupled to an output shaft of a motor, and has a male screw portion formed on an outer periphery thereof. The moving member includes a moving member that is screwed onto the screw shaft and is prevented from rotating around the axis line, and a guide member that movably supports the article in a linear direction, and the moving member includes a first magnetizing portion. Is provided, the tip of the guide member is slightly separated from the tip of the first magnetized portion in the direction orthogonal to the moving direction of the article, and Since the second magnetizing part that generates an attractive force is provided between the magnetic part and the magnetic part, the screw shaft is driven to rotate in the normal and reverse directions by the rotation of the motor in the normal and reverse directions. Transform motion into linear motion by moving member Then, it is transmitted to the guide member via the magnetic attraction force of the first magnetized portion and the second magnetized portion, whereby the article can be driven in the linear direction. Since the first magnetized portion and the second magnetized portion are not in contact with each other and the movement of the moving member is elastically transmitted to the guide member via the magnetic attraction force, the elastic force absorbs the vibration, and Similar to the article drive device according to the item 2, unlike the related art, the slight vibration of the moving member is not directly transmitted to the guide member, the vibration is suppressed to the minimum, and the vibration noise is also suppressed.

[Submission date] September 26, 1991

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0002

[Correction method] Change

[Correction content]

[0002]

[Prior Art]

As a device (for auto focus) that drives a focusing lens of a VTR camera in the optical axis direction, devices such as those shown in FIGS. 10 and 11 are conventionally known. This device includes a stepping motor 4 in which a screw shaft 2 having an externally threaded portion 3 formed on the outer periphery is connected to an output shaft, and a moving member screwed into the screw shaft 2 and prevented from rotating around its axis. 6 and a guide member 12 movably provided on a moving pin 8 and having a lens 10 mounted therein.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0005

[Correction method] Change

[Correction content]

In order to prevent this, as shown in FIG. 12 , there is a device in which a rubber damper 14 is interposed between the coupling portion between the engaging portion 6a and the engaging portion 12a. Even in this case, there is a problem in that the vibration of the stepping motor 4 is not sufficiently absorbed and vibration noise is generated.

[Brief description of drawings]

FIG. 1 is a side view of an article driving device according to an embodiment of the present invention.

FIG. 2 is a partially enlarged view of the article driving device according to the embodiment.

FIG. 3 is a partially enlarged view of an article driving device according to another embodiment of the device according to claim 1.

FIG. 4 is a partially enlarged view of an article driving device according to another embodiment of the device according to claim 1.

FIG. 5 is a partial enlarged view of an article driving device according to another embodiment of the device according to claim 1.

FIG. 6 is a partially enlarged view of an article driving device according to another embodiment of the device according to claim 1.

FIG. 7 is a partial enlarged view of an article driving device according to an embodiment of the invention of claim 2 or claim 3;

FIG. 8 is a partially enlarged view of an article driving device according to another embodiment of the invention according to claim 2 or claim 3;

FIG. 9 is a partially enlarged view of an article driving device according to another embodiment of the device according to claim 3;

FIG. 10 is a side view showing an example of a conventional article driving device.

FIG. 11 is a perspective view showing the article driving device.

FIG. 12 is a side view showing another example of the conventional article driving device.

[Explanation of symbols]

2 screw shaft 3 male screw part 4 motor 6 moving member 12 guide member 16, 20, 24, 34 first magnetizing part 18A, 22A, 26, 28, 30, 32, 36, 38
Second magnetized portion 40 First magnetized portion 42 Second magnetized portion (suction portion) 44 First magnetized portion 46 Second magnetized portion (suction portion) 48 First magnetized portion 50 Suction portion

Claims (3)

[Scope of utility model registration request] 1. A screw shaft that is rotatably supported around an axis, is connected to an output shaft of a motor, and has a male screw portion formed on the outer periphery, and a screw shaft that is screwed onto the screw shaft and rotates around the axis. A moving member that is prevented from moving, and a guide member that supports the article so as to be movable in a linear direction. One of the moving member and the guide member is a first member.
The magnetizing part is provided, and on the other side of the moving member or the guide member, the first magnetizing part is arranged apart from each other in the article moving direction,
An article drive device, comprising: a second magnetized portion that generates a repulsive force between the first magnetized portion. 2. A screw shaft, which is rotatably supported around an axis line, is connected to an output shaft of a motor, and has a male screw portion formed on the outer periphery, and a screw shaft screwed to the screw shaft to rotate around the axis line. A moving member that is prevented from moving, and a guide member that supports the article so as to be movable in a linear direction. One of the moving member and the guide member is a first member.
A magnetized portion is provided, and the other end of the moving member or the guide member is arranged such that its tip is slightly separated from the tip of the first magnetized portion in a direction orthogonal to the moving direction of the article. Was set up,
Further, the article driving device is characterized in that a suction section that generates a suction force is provided between the article drive apparatus and the first magnetized section. 3. A screw shaft that is rotatably supported around an axis, is connected to an output shaft of a motor, and has a male screw portion formed on the outer periphery, and a screw shaft that is screwed into the screw shaft and rotates around the axis. A moving member that is prevented from moving, and a guide member that movably supports the article in a linear direction, the moving member is provided with a first magnetized portion, and the guide member has a tip, A second ring member that is disposed slightly apart from the tip of the first magnetizing unit in a direction orthogonal to the moving direction of the article and that generates an attractive force between the first magnetizing unit and the first magnetizing unit. An article drive device characterized in that a magnetic part is provided.