JPS61295859A - Linear pulse motor - Google Patents

Abstract

PURPOSE:To reduce the thickness and the weight of a movable element, to enhance the efficiency and to accelerate the operating speed of a linear pulse motor by forming a stator by disposing two sets of pole teeth trains at both sides of the element arranged with scale teeth of a magnetic material. CONSTITUTION:A plurality of scale teeth 18 made of a magnetic material are arranged though a nonmagnetic material at the prescribed pitch to form a movable element 10. Two sets of pole teeth train having poles 14 on which coils 14 are wound and a permanent magnet 13 are opposed through a gap so that the pole teeth 15 are opposed to form a stator 11. The element 10 is inserted through an ultrafine gap between the opposed pole teeth 15 of the stator 11 to form a linear pulse motor. Thus, since a yoke for passing a magnetic flux is eliminated between the teeth 18 on the element 10, the element 10 can be reduced in weight and thickness, thereby efficiently obtaining a thrust.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a linear pulse motor used for feeding a magnetic head and for use in various other devices.

[Background technology]

FIG. 3 shows a conventional linear pulse smoke. In the figure, 1 is a movable element, in which grooves 8 are dug at regular pitches on a flat plate, and scale teeth 7 are formed. 2 is a stator main body, yoke 3. Permanent magnet4. Coil 5. magnetic pole tooth 6
It becomes more. The gap between the stator and mover is kept constant by rollers 9.

In the linear pulse smoke with such a configuration, the flow of magnetic flux of the permanent magnet 6 and the coil 5 is shown in 1. As shown by the a-chain line and the broken line, a yoke portion must be provided under the scale tooth 7 to serve as a path for the magnetic flux. As a result, the weight of the mover 1 becomes large, which slows down the operating speed of the mover, and the thickness t of the mover increases. In addition, the deeper the groove 8 is, the less leakage of magnetic flux to the groove bottom surface is, and the more efficiently thrust can be obtained.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a linear pulse motor that has a light movable element, can be made thin, can efficiently obtain thrust, and has a high operating speed.

[Disclosure of the invention]

In the linear pulse motor of the present invention, scale teeth made of a magnetic material are arranged at a constant pitch through a non-magnetic material to constitute a movable element, and the stator is arranged such that magnetic flux passes through the scale teeth of the movable element. Each magnetic pole tooth is arranged to face each other on both sides of the movable element. The non-magnetic material between the scale teeth of the mover may be an air layer formed by a gap, or may be made of plastic, rubber, or the like.

In this way, the magnetic flux passes through the scale teeth of the mover and flows to the opposing magnetic pole teeth of the stator, so it is not possible to provide the mover with a yoke part to pass the magnetic flux between each scale tooth as in the past. No longer needed. Therefore, the thickness of the movable element Li can be reduced accordingly, and the movable element Lit can be made lighter. Furthermore, since the movable element is lighter in weight, the operating speed becomes faster. Furthermore, since there is no yoke portion between each scale tooth of the movable element, there is no leakage of magnetic flux to the bottom surface of the scale tooth groove formed by the yoke portion as in the prior art, and thrust can be efficiently obtained.

Embodiment An embodiment of the present invention is not shown in FIGS. 1 and 2. In the figure, reference numeral 10 denotes a movable element, in which scale teeth 18 made of a flat magnetic material are arranged in parallel with a certain pitch across an air gap, and both ends of the scale teeth 18 are fixed to a connecting member 17 made of a non-magnetic material. It has a ladder-like configuration as shown in the figure. The air layer between the gaps provides a non-magnetic material separating each scale tooth 18.

11 is a stator, which includes a yoke 12, a permanent magnet 13,
Consisting of a coil 14 and a row of 2Mi magnetic pole teeth 15,
The rollers 16 rollingly contact the connecting member 17 of the movable element 10, so that the movable element 10 is symmetrically held on both sides with a certain gap therebetween. The roller 16 is attached to the stator 11.

The m1ifilii15 of the stator 11 are arranged at positions out of phase with each other. Further, the magnetic pole teeth 15 of the upper and lower magnetic pole sets of the stator 11 are arranged on both sides of the movable element 10 so as to face each other.

Operation According to this configuration, the magnetic fluxes of the permanent magnet 13 and the coil 14 flow as shown by the dashed line and dashed line in FIG. Flows between teeth 15. Therefore, it is no longer necessary to provide a yoke part for flowing magnetic flux between each scale tooth as in the conventional case, and the thickness t' of the mover 10 is
It can be made as thin as desired for the purpose of magnetic flux flow. Therefore, the weight of the movable element 10 can be reduced, and a linear pulse motor with high operating speed can be realized. Furthermore, since there is no yoke portion between each scale tooth 18 of the movable element 10, there is no leakage of magnetic flux in the yoke portion, and thrust can be efficiently obtained.

In the above embodiment, the movable member 10 was made into a ladder shape using the connecting member 17, but instead of using the connecting member 17, a non-magnetic material such as plastic was used between each scale tooth 18, and the non-magnetic material It is also possible to adopt a structure in which each scale tooth 18 is integrally fixed. Further, the connecting member 17 may be formed integrally with each scale tooth 18 from a magnetic material. In that case, mover 10
It can be punched and formed using a press. In addition, even when the connecting member 17 is formed of a non-magnetic material as in the first embodiment, a plate material of the magnetic material is punched out in the shape of a ladder, and the connecting member 17 is integrally molded inside the vertical pieces on both sides. It can be easily manufactured by cutting off the vertical pieces on both sides later.

〔Effect of the invention〕

In the linear pulse smoke of this invention, the scale teeth made of a magnetic material are arranged at a constant pitch through a non-magnetic material to constitute a mover, and each magnetic pole tooth of the stator is arranged facing each other on both sides of the mover. The magnetic flux passes through the scale teeth of the mover and flows to the opposing magnetic pole teeth of the stator. Therefore,
It is no longer necessary to provide the movable element with a yoke portion for passing magnetic flux between each scale tooth as in the conventional case. Therefore, the thickness of the movable element can be reduced accordingly, and the weight of the mover can be reduced.

Furthermore, since the movable element is lighter in weight, the operating speed becomes faster. Furthermore, since there is no yoke part between each scale tooth of the mover, there is no leakage of magnetic flux to the bottom of the scale tooth groove, which is made up of the yoke part, as in the conventional case. .

[Brief explanation of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a partial perspective view of a movable element thereof, and FIG. 3 is a sectional view of a conventional linear pulse motor. 10...Mover, 11...Stator, 12...Yoke, 13...Permanent magnet, 14...Coil, 15...
・Magnetic pole tooth, 17...Connection member, 18...Scale tooth 10--Issushi jW child 14--Carp) 1
1-1 constant + 15- Magnetic pole tooth 12- Yaw 7 17- Fast forward to Hagi 13---, 5
18-11 Scale surface Figure 2 Figure 3 Procedural amendment (August 26, 1985, 1960 Patent Application No. 138630 2, Title of invention Linear pulse motor 3, Relationship with the person making the amendment) Applicant 4, attorney's specification, page 5, lines 14 to 17, delete the phrase ``You may also form a song.''

Claims (1)

[Claims] A mover in which scale teeth made of magnetic material are arranged at a constant pitch with a non-magnetic material in between, and two sets of magnetic pole tooth rows located on both sides of this mover with a minute gap between them. A linear pulse motor is equipped with a stator and a stator whose magnetic pole teeth are arranged opposite to each other so that the magnetic flux passes through the scale teeth of the movable element.