JPH0526945Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a movable magnet type linear motor that can increase thrust, have a small bending radius, and can face any bending direction.

"Prior Art" Electric linear motors, which are built into curtain rails in vehicles and houses, and are used as automatic curtain opening/closing devices, have components such as magnets, overhead wires, and yokes arranged inside a linear motor rail made of extruded aluminum. For vehicles, a curved portion is formed along the body shape of the back door portion.

``Problem that the invention aims to solve'' However, as mentioned above, the linear motor rail in which components such as magnets and yokes are arranged has a structure that makes the rail itself large, making it difficult to accommodate small bending radii. With the diversification of vehicle body designs and housing designs, it is not only impossible to meet design requests such as the desire to form curved parts with small bending radii, but also to improve thrust without changing the structure. Since this method requires the use of high-performance magnets, there are inconveniences such as increased costs, and this has become a problem that needs to be solved.

"Means for Solving the Problems" The present invention aims to solve the above problems, and its specific means is to form a press-molded sheet coil with a flexible printed circuit board or the like. A stator is formed by sequentially attaching it to a power feeding pattern to form a belt-like coil and is laid in a linear motor rail, and at least three magnets having mutually different polarities adjacent to each other in the movable direction are arranged to form a belt-like coil. and a movable element in which a power supply brush is arranged for each magnet to generate a magnetic flux, switch the current direction by the power supply pattern in relation to the different magnetic flux directions, and supply power to the sheet coil. This is a characteristic feature.

"Function" As clarified in the explanation of the above-mentioned specific means, in the present invention, the power supply pattern of the belt-shaped coil laid in the linear motor rail plays the role of a commutator, and this power is supplied from the power supply brush on the movable element side. Because the sheet coil on the stator side is powered through the pattern in the current direction that matches the polarity of the magnetic flux of the magnet,
A movable element made up of one or more magnets receives thrust and moves along a linear motor rail. In addition, a linear motor rail is made by laying belt-shaped coils formed by sequentially attaching sheet coils to a power supply pattern formed from a flexible printed circuit board.
It can be formed into a thin plate shape and can be curved to accommodate a small bending radius. Further, since the movable element is operated by being attracted to the stator side, it can move by following the curved portion of the rail with a small bending radius without separating from the stator.

"Example" An example of the present invention will be described based on the accompanying drawings.

The stator 2 of the linear motor 1 of this embodiment is the first,
As shown in Figures 3 and 4, press-molded sheet coils 3 are sequentially pasted on the back side of the power supply pattern 4 to form a belt-shaped coil 5, and then a linear motor rail 6 is formed.
It is inserted inside. The power supply pattern 4 is formed by etching copper foil or plating on a flexible strip-shaped insulating substrate 4' made of synthetic resin such as polyester or polyimide, and the pattern is applied to the sheet coil 3. In order to enable power to be supplied to the coil 3 in the opposite current direction according to the direction of the magnetic flux at approximately the center of the coil 3, patterns 4a and 4b are bent and intricate with respect to each other, and strip-shaped patterns 4c and 4d are formed on both sides of the coil 3. are arranged continuously in the longitudinal direction. The winding start end and winding end of the sheet coil 3 are connected to the strip-shaped patterns 4c and 4d, respectively.

Reference numeral 6 denotes a linear motor rail on which the belt-like coil 5 is laid, with insertion grooves 7, 7 at the upper and lower ends, a yoke fixing part 8 at the center, and a running roller for the outer side of the insertion grooves 7, 7. The grooves 9, 9 are integrally molded from aluminum extrusion. On this linear motor rail 6, a yoke 10 is fixed to a yoke fixing part 8, and the belt-shaped coil 5 is inserted and fixed in the insertion grooves 7, 7.

As shown in FIG. 2, the mover 11 has three magnets 13 arranged in N, S, N (or S, N,
S), the shaft 15 is fixed together with the yoke 14, and the shaft 15 is inserted in the longitudinal direction of the resin frame 12, and the shaft 15 of the central resin frame 12, which fixes the S polarity magnet 13, is inserted between the front and rear sides. The three resin frames 12 are connected in such a way that they are shared with the front and rear shafts 15 of each resin frame 12 that fixes the N-polarity magnets 13, and each shaft 15 is connected to a shaft 15 for the traveling roller of the linear motor rail 6. A running roller 1 that fits into the grooves 9 and runs
I support 6,16. The length of each magnet 13 is
It should be 2/3 of the length of sheet coil 3. 17,17
are power feeding brushes which are arranged one above the other with an N-polarity magnet 13 in between, and contact portions 18 branched into two forks are arranged in a staggered manner at the center of the magnet 13 in the longitudinal direction. 19, 19 is S polarity magnet 13
The contact portions 20 are arranged in a staggered manner at the longitudinal center of the magnet 13, and the upper and lower power feeding brushes 19, 19 are arranged on the back side of the resin frame 12, respectively. Connect with conductive connection pieces. the contact portion 18,
20 is caulked with contact material 21 to improve durability. The bifurcated contact portions 18 of the power supply brushes 17, 17 provided on the N-polarity magnet 13 move on the lines La, Lb and Lc, Ld of the power supply pattern 4 shown in FIG. The contact portions 20 of the power supply brushes 19, 19 provided on the line La
Place it so that it moves on Lc, Lb and Ld.

The linear motor 1 of this embodiment is composed of the stator 2 and the mover 11 described above, and the (+) electrode is connected to the pattern 4a of the power supply pattern 4 of the stator 2, and the (-) electrode is connected to the pattern 4b. Then, when a DC voltage is applied, the power is applied only to the sheet coil 3 corresponding to each magnet 13 via the strip-shaped patterns 4c and 4d bridged by the power supply brushes 17, 17 and 19, 19, as shown in FIGS. As shown in f, a current flows in a direction corresponding to the direction of the magnetic flux.

In FIG. 5, an N-polarity magnet 13 applies a downward magnetic flux to the corresponding coil 3, and an S-polarity magnet 13 applies an upward magnetic flux to the coil 3.

First, in the state shown in FIG. 5a, each power supply pattern 17, 17,
19, 19, of the two coils 3 corresponding to the magnets 13, the left side of the left side coil 3 receives a clockwise current from the page to the front, the right side receives a clockwise current going from the front to the page, and the right side coil 3 receives the above-mentioned current. A current counterclockwise in the opposite direction is passed, and each magnet 13 receives a rightward thrust according to Fleming's left-hand rule and moves in the direction of the arrow in the figure. In the position shown in FIG. 5b, the feeding brushes 17, 17 of the N-polarity magnet 13 on the left side move to the right side of the left coil 3, and the current direction changes to the opposite direction due to the feeding pattern 4. Also, the coil 3 on the right side is S
Since power is supplied by the power supply brushes 19, 19 of the polarized magnets 13, the current direction does not change. Furthermore, the fifth
In the position shown in Figure c, the current direction of the second coil 3 from the left is reversed to that shown in Figure b, as the feeding brush 19 moves due to the rightward movement of the S-polarity magnet 13. Further, a current flows toward the front from the plane of the paper in the coil 3 corresponding to the N-polarity magnet 13 on the right side.
The first coil 3 on the left side corresponding to the N-polarity magnet 13 on the left side has power supply brushes 17, 1 for the magnet 13.
7 is located at a discontinuous portion of the rectangular power supply patterns 4c and 4d, so no current flows. In all of the states shown in FIGS. 5a, 5b, and 5c, each magnet 13 receives a rightward thrust and moves sequentially in the arrow direction according to Fleming's left-hand rule. In the cases shown in Figs. 5 d to 5f, the states shown in Figs. 5 a to 5 c are repeated with the sheet coil 3 moved to the right by one sheet coil 3, and the sheet coils 3 are sequentially moved to the right.

The direction of movement is changed by changing the direction of the voltage applied to the stator 2.

The propulsive force of the mover 11 can be increased by arranging magnets with different magnetic poles next to each other and increasing the number of resin frames 12 by connecting them as described above.

FIG. 6 shows an automatic curtain opening/closing device using the linear motor 1 of the present invention, in which a curtain runner base 22 is attached to the resin frame 12 of the movable element 11, and the linear motor rail 6 and cover 2 are attached.
3 to form a curtain rail 24. The cover 23 is fixed to the linear motor rail 6 by a clamp 25. Reference numeral 26 denotes a curtain hanging member movable within the curtain rail 24 by a running roller 27, which suspends the curtain 28 at regular intervals and also hangs the opening and closing ends of the curtain 28. The curtain runner base 22 is connected to the curtain runner base 22 to automatically open and close the curtain 28 by moving the movable element 11.

Specific examples thereof are shown in Figures 7a and b, and Figure 7a
1 shows the curtain rail 24 bent into a crank shape, and FIG. 1B shows the curtain rail 24 bent at a constant bending radius.

The linear motor 1 of the present invention can be used not only as an automatic curtain opening/closing device as described above, but also as a transportation device for articles and the like by moving it in a plane.

"Effects" As clarified in the explanation of the specific means and operation described above, the linear motor rail that constitutes the linear motor is constructed by sequentially attaching sheet-like coils to a power supply pattern formed by a flexible printed circuit board. It can be formed into a thin plate by laying belt-like coils, and since the mover is attracted to the stator and operates, it can be moved without detaching from the stator, so it has a small bending radius. Alternatively, a curved portion can be formed corresponding to an arbitrary bending direction, and the number of magnets used can be reduced as a movable magnet type in which at least three magnets are arranged in the movable element with different adjacent magnetic poles, A power supply brush is provided corresponding to each magnet, and only the sheet coil corresponding to the magnet is supplied with power, so that thrust always acts on all the magnets, so thrust can be efficiently improved.

[Brief explanation of the drawing]

The accompanying drawings illustrate an embodiment of the present invention, and FIG. 1 is a cutaway side view of a linear motor rail 6;
FIG. 2 is a perspective view of the mover 11, and FIG. 3 is a perspective view of the stator 2.
4 is a front view of a part of the power supply pattern 4, FIG. 5 is a chart showing the operation of the linear motor 1, FIG. 6 is a side sectional view of the curtain rail 24, and FIGS. 7a and 7b are Curtain rail 2 applying this invention
4 is a perspective view of FIG. 1... Linear motor, 2... Stator, 3... Sheet coil, 4, 4a, 4b, 4c, 4d...
Power feeding pattern, 5... Belt-shaped coil, 6... Linear motor rail, 11... Mover, 13... Magnet, 17, 17, 19, 19... Power feeding brush.

Claims (1)

[Scope of Claim for Utility Model Registration] A stator formed by sequentially attaching press-molded sheet coils to a power supply pattern formed of a flexible printed circuit board, etc. to form a belt-shaped coil, which is then laid within a linear motor rail. and, disposing at least three magnets with mutually adjacent polarities in the movable direction to generate magnetic flux in different directions, and switching the current direction by the power feeding pattern in relation to the different magnetic flux directions, and 1. A movable magnet type linear motor comprising a movable element in which a power supply brush for supplying power to a sheet coil is arranged for each magnet.