JP2715827B2 - Power supply device for moving parts - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a movable part for supplying power by electrically connecting a flat cable having an arc-shaped turn to the movable part in various electric devices having a movable part in a guide case. Power supply device for

[0002]

2. Description of the Related Art Conventionally, a feeding device for feeding a movable portion by a flat cable having a folded back is provided by increasing a rigidity by overlapping and supporting a flat cable with a leaf spring formed in an arcuate curved surface in a transverse cross-sectional direction. A cable guide in which buckling and meandering are prevented (Japanese Unexamined Patent Publication No. 63-253813), a cable guide having a belt-shaped projecting portion formed in a longitudinal direction at both ends of a cable guide body made of a strip-shaped resin having a constant width. (Japanese Utility Model Application Laid-Open No. 2-104725), a band-shaped magnet is attached to a flat cable connecting a reciprocating movable part and a main body, and the flat cable is attached to a metal fixing plate on the main body side. There is a cable in which the cable can be connected and detached to prevent the cable from being damaged and meandering (Japanese Utility Model Laid-Open No. 63-164327).
However, those in which a flat cable is overlapped with the leaf spring and those in which the cable guide is used as a cable holding component have a problem that durability is low unless a large bending radius is used. In addition, when attaching a band-shaped magnet to a flat cable, there is a problem that the bending radius becomes large because the band-shaped magnet is attached, and in any case, a large storage space for the power supply device is required. Met.

[0003] Japanese Patent Application Laid-Open No. 3-88216 discloses a technique as shown in FIG.
As shown in FIG. 2, a flat cable assembly 36 in which a conductive wire 42 and a magnetic wire 43 are insulated and fixed in parallel at equal intervals by a covering member 41 to impart magnetism is disclosed. Also,
This publication discloses a dot matrix serial printer to which the flat cable assembly 36 is applied as shown in FIG. 10, and a carriage 32 has a print head 30 and an ink ribbon 31 mounted thereon. The carriage 32 is fixed to a belt 34, and the belt 34 is fed by rotation of a drive motor 35, and the carriage 3
2 moves on the guide shaft 33. Print head 30
Has printing pins, and printing is performed by pressing the printing pins against the paper via the ink ribbon 31, and the driving signal is transmitted via the cable assembly 36. A magnet 37 is provided on the fixed side of the flat cable assembly 36, and the flat cable assembly 36 having low rigidity is attracted to prevent meandering.

[0004]

[0007] However, the above apparatus having the conventional structure carriage 32 is moved without any problem in the movement direction to pull the flat cable assembly 36, but flat as shown in FIG. 1 2 is moved in the push direction The cable assembly 36 may meander on the carriage 32 side, and the meandering hinders the movement of the carriage 32. SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems of the prior art and to provide a power supply device which can be used in a narrow storage space and which does not bend and meander in a pushing direction even in a pushing direction.

Another object of the present invention is to provide a power supply device for a movable part which has improved operation durability at a contact part of a cable assembly and has reduced sliding noise during operation. Another object of the present invention is to provide a power supply device that satisfactorily supplies power to a mover of a moving coil linear motor. Still another object of the present invention is to prevent meandering of a cable assembly without providing a special magnetic pole portion.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a flat cable having a guide surface on which a movable portion reciprocates, and the movable portion is formed by bending a fixed portion into an arcuate shape. A power supply device for electrically connecting the flat cable to a cable assembly by imparting magnetism to the flat cable, and capable of attracting the cable assembly to the guide surface with which the cable assembly comes into contact with the reciprocating movement of the movable portion. The present invention provides a power supply device for a movable portion, wherein a magnetic pole portion is provided.

[0007] The present invention solves another problem.
A power supply device characterized in that a tape-shaped guide having a small coefficient of friction and excellent abrasion resistance is superposed on a contact surface of the flat cable with the guide surface. According to another aspect of the present invention, there is provided a power supply device, wherein the movable portion is a movable element of a moving coil linear motor. Further, the present invention provides a power supply device for a movable portion, wherein a magnet of a stator of the movable coil type linear motor also serves as a magnetic pole portion capable of attracting the cable assembly.

[0008]

According to the present invention, when the movable portion is reciprocated along the guide surface, the cable assembly moves while contacting the guide surface on which the magnetic pole portion is provided. The cable assembly provided with magnetism is not bent and does not meander by being attracted to the magnetic pole portion. Furthermore, when a tape-shaped guide is superimposed on the flat cable, the contact portion of the cable assembly is protected and the frictional force and the sliding noise are reduced.

[0009]

An embodiment of the present invention will be described with reference to the drawings.
FIG. 1A is a cross-sectional view of a power supply device for a movable portion according to the present invention. FIG. 1B is a cross-sectional view taken along the line AA in FIG. The power supply device of the present invention includes the movable part 3 in the guide case 4.
A resin slide guide 13 that reciprocates, and electrically connects the movable portion 3 to a fixed portion 6 in the guide case 4 by a flat cable 5 formed by folding back in an arc shape. A cable assembly 9 in which a magnetic thin plate 8 (for example, a stainless steel plate having magnetic properties (SUS301)) having a thickness of about 0.1 mm is joined to one surface of the flat cable 5 and a tape-like guide 22 is overlapped on the other surface. A tape-shaped guide 22 is disposed facing the guide surface 20 with which the cable assembly 9 is in direct contact;
The structure is such that a permanent magnet plate 7 capable of attracting the cable assembly 9 is disposed inside the slide guide 13.

The tape-shaped guide 22 has a thickness of 0.1 to 0.1 mm.
A resin tape made of 3 mm of 66 nylon, polyethylene, or the like, having a small coefficient of friction and excellent in abrasion resistance, is superposed on the flat cable 5 and bonded only at both ends. Alternatively, instead of overlapping over the entire length of the flat cable 5, the overlapping may be performed only on the portion that comes into contact with the slide guide 13.

The guide case 4 has an opening groove 11 in which the movable portion 3 moves, formed below, and the supporting portions 1 on both sides of the opening groove 11.
2, a permanent magnet plate 7 is provided, and the permanent magnet plate 7 is protected by a slide guide 13. The cable assembly 9 has one end fixed to the movable part 3 and the other end fixed to the fixed part 6 of the guide case 4, and is movable on the guide surface 20 of the slide guide 13 as the movable part 3 moves. It is. The fixed end of the fixed portion 6 is a power supply terminal that is electrically connected to an external power supply via a current interrupt control circuit. A print head, a movable coil, and the like (not shown) are provided in the movable unit 3.

Next, the operation will be described. According to the above-described power supply device, the movable portion 3 is the slide guide 1 of the guide case 4.
When the upper surface 3 reciprocates, the movable portion 3 side of the cable assembly 9 that moves with the movable portion 3 is constantly attracted to the guide surface 20 of the slide guide 13 by the magnetic attraction between the permanent magnet plate 7 and the magnetic thin plate 8. Therefore, even when the movable part 3 that moves reciprocally moves to the left as shown in FIG. 1, the cable assembly 9 does not meander and bend.

Therefore, the cable assembly 9 is
12 is not deformed and meandered by the magnetic attraction of the permanent magnet plate 7 and the magnetic thin plate 8 as shown in FIG. 12, the bending radius of the cable assembly 9 can be reduced by making the magnetic thin plate 8 an ultra-thin plate. As a result, the height H of the guide case 4 can be reduced. Further, since the tape-like guide 22 of the cable assembly 9 is made of resin, wear and operation noise of the cable assembly 9 are reduced, and durability is further improved.

FIGS. 2 to 8 show an application of the power supply device of the present invention to a moving coil type linear motor 2 (hereinafter, referred to as a linear motor 2). Stator 14 and mover 1 of linear motor 2
0. Hereinafter, the power supply device used for the linear motor 2 will be described. This power supply device is a device in which a stator 14 and a mover 10 are electrically connected by a cable assembly 9 having magnetism, and the cable assembly 9 formed by folding back in the guide case 4 is moved with the movement of the mover 10. One end of the cable assembly 9 is moved
0 and the other end is connected to the stator 14 to form a power supply device. In the above-described embodiment, the magnetic thin plate 8 is superimposed on one surface of the flat cable 5 and the tape-shaped guide 22 is superimposed on the other surface. The thin plate 8 and the tape-shaped guide 22 may be sequentially overlapped.

FIGS. 2A and 2B are explanatory diagrams of a power supply device of the linear motor 2. FIG. In the cable assembly 9 shown in the figure, a supermagnetic thin plate 8 for preventing bending and a tape-like guide 22 for improving abrasion resistance are superimposed on the flat cable 5, and the flat cable 5 is attracted by the magnetic force of the stator 14. In this power supply device, the operation durability is greatly improved by arranging the tape-shaped guide 22 for protection of the flat cable 5, the thrust of the linear motor 2 is improved by suppressing the frictional force, and the operation noise is reduced. Can be lower. Further, by changing the thickness of the tape-shaped guide 22, the suction force and the frictional force of the cable assembly 9 can be controlled, and the holding force can be arbitrarily adjusted according to the linear motor 2.

FIGS. 3A to 3D are cross-sectional views of the linear motor 2 having a permanent magnet plate 7 for exclusive use for attracting the cable assembly 9 according to the applied embodiment. FIG. 3A shows a state in which a stator 14 is provided inside a guide case 4 with a yoke 16 interposed and isometric magnets 15 arranged opposite to each other.
A linear motor 2 movably constitutes a movable element 10 having a flat coil molded therebetween, and one end of a cable assembly 9 is fixed to the movable element 10 and the other end is fixed to the guide case 4 for connection. Cable assembly 9 on mover 10 side
Is a power supply device for the mover 10 which is constructed by arranging a permanent magnet plate 7 for exclusive use for sucking the cable assembly 9 outside the guide case 4.

FIG. 3B shows a power supply for arranging a dedicated permanent magnet plate 7 inside the lower part of the guide case 4 in the linear motor 2 shown in FIG. Device.

FIG. 3 (c) shows the linear motor 2 of the linear motor 2 shown in FIG. 3 (a), which constitutes the movable element 10 in which a coil 17 is wound around an iron core 18. This is a power supply device that disposes the permanent magnet plate 7 and attracts the cable assembly 9 on the mover 10 side.

FIG. 3D shows the positional relationship between the stator 14 having the equal length magnets 15 disposed inside the guide case 4 and the stator 14 between the two side pieces of the iron core 18. A coil 17 is reversely wound around each of the side pieces 18, and one end of the cable assembly 9 is fixed to the mover 10 and the other end is fixed to the guide case 4 by the linear motor 2 forming the mover 10 forming an electromagnet. A dedicated permanent magnet plate 7 for sucking the cable assembly 9 on the mover 10 side is disposed inside the guide case 4.

FIGS. 4A to 4D and FIGS.
(B) is a sectional view of the moving coil linear motor 2 using the yoke 16 for suctioning the cable assembly 9 of the application example. FIG. 4 (a) shows a power supply device formed inside the lower part of the guide case 4, and a yoke 16 provided behind the isometric magnet 15 of the stator 14 is extended to be used as a magnetic pole portion for attraction of the cable assembly 9. This is a power supply device that attracts the cable assembly 9 on the mover 10 and the stator 14 side by using the magnetic force of a magnetic circuit formed by the isometric magnet 15 and the yoke 16.

FIG. 4 (b) shows a cable assembly 9 on the movable member 10 and the stator 14 side, which is constructed by extending and arranging the yoke 16 for sucking the cable assembly 9 as a magnetic pole portion inside the upper part of the guide case 4. Power supply device.

FIG. 4 (c) shows a case where the cable assembly 9 on the movable member 10 and the stator 14 side is formed by extending the yoke 16 as a magnetic pole portion inside the upper part of the guide case 4 in order to suck the cable assembly 9. Power supply device.

FIG. 4D shows the linear motor 2 having the running roller 1 in which the yoke 16 is extended and the yoke 16 is disposed below and inside the guide case 4. Is a power supply device for sucking the cable assembly 9 of FIG.

FIG. 5A shows a movable case in which a coil 17 is wound around an iron core 18 between stators 14 having yokes 16 interposed on the upper and lower inner sides of a guide case 4 and opposed magnets 15 arranged opposite to each other. The yoke 16 is extended, and one end of the cable assembly 9 is
The yoke 16 for sucking the cable assembly 9 is extended on both sides of the guide case 4 of the cable assembly 9 of the mover 10 and the stator 14 with the other end fixed to the guide case 4 and connected. This is a power supply device for the mover 10 that is arranged and configured.

FIG. 5B shows a cable assembly 9 having one end fixed to the mover 10 and the other end extended and fixed to the inside of the guide case 4 by extending a yoke 16. This is a power supply device for the mover 10 configured to arrange the isometric magnet 15 for attracting the assembly 9. This power supply device is a power supply device for the movable element 10 that uses the yoke 16 on the stator 14 side for attracting the cable assembly 9 and also suctions the isometric magnet 15 on the movable element 10 side.

FIGS. 6 (a) to 6 (d) show a moving coil type linear motor in which the isometric magnet 15 of the stator 14 of the applied embodiment is also used for forming a magnetic field for generating thrust and for attracting the cable assembly 9. 2 is a sectional view of FIG. FIG. 6A shows a mover 10 in which one end of the cable assembly 9 is fixed inside the upper surface of the guide case 4 and the other end is in contact with the guide surface 20 at the upper end of the isometric magnet 15.
And a power supply device for the mover 10 configured to move on the guide surface 20 while the cable assembly 9 on the mover 10 side is attracted by the magnetic force of the isometric magnet 15.

FIG. 6B shows a power supply device to the movable element 10 having a configuration in which the movable element 10 is in contact with the moving surface 20 below the isometric magnet 15 for attracting the cable assembly 9.

FIG. 6C shows a state where a smooth surface is formed by joining the equal-length magnet 15 and the spacer 19 inside the upper part of the guide case 4, and a part of the cable assembly 9 on the mover 10 side and the stator 14 side is formed. This is a power supply device for the mover 10 configured to be in contact with and attracted to the isometric magnet 15.

FIG. 6D shows a cable assembly 9 in which one end is fixed to the mover 10 and the other end is fixed to the guide case 4 for connection. The cable is connected to the isometric magnet 15 on the mover 10 side. This is a power supply device for the mover 10 configured to suck the assembly 9.

FIGS. 7 (a) and 7 (b) show an electromagnet mover 10 according to an applied embodiment, in which an isometric magnet 15 of a stator 14 is used to form a magnetic field for generating a thrust and a cable assembly 9 is attracted. FIG. 2 is a cross-sectional view of a moving coil linear motor 2 which is also used for the first embodiment. 7 (a) is, and the other end fixed to isometrically magnet 15 the lower end of the one end of the cable assembly 9 iron core 18 center portion fixed to the inner ones that were connected, solid in isometric magnets 15 of the stator 14 This is a power supply device for the mover 10 configured to suck the cable assembly 9 on the side of the armature 14.

FIG. 7 (b) shows one end of the cable assembly 9 in the linear motor 2 of FIG.
0 and the other end is fixed inside the guide case 4, and the cable assembly 9 on the mover 10 side attracts the guide surface 20 below the isometric magnet 15 to the mover 10.

FIG. 8 shows a cable assembly 9 according to an applied embodiment.
FIG. 3 is a cross-sectional view of a linear motor 2 that attracts a magnetic pole by a yoke constituting a magnetic pole. An isometric magnet 15 is disposed inside a guide case 4 with a yoke 16 interposed therebetween, and the isometric magnet 1 is disposed on an opposite side.
Yoke 16 constituting a magnetic pole by a magnetic circuit formed by 5
In the linear motor 2 that movably configures the mover 10 between the stators 14 provided with, the power supply device for the mover 10 is connected to one end of the cable assembly 9 to the mover 10 and to the other end. It is fixed and connected to the guide case 4 and has a configuration in which the cable assembly 9 is suctioned by an extended yoke 16 on the mover 10 side.

In the power supply device applied to the moving coil linear motor 2 as described above, the isometric magnets 15 are formed by effectively using the isometric magnets 15 of the stator 14 as shown in FIGS. There is an advantage that the main magnetic field is used for the linear motor and the magnetic attraction force due to the leakage magnetic flux is used for attracting the cable assembly 9. Since the cable assembly 9 used for the power supply device of the moving coil type linear motor 2 does not intersect with the magnetic field in the magnetic circuit for generating the thrust, it has almost no effect on the reduction of the magnetic flux density. Is no problem.

FIG. 9 is a perspective view showing a flat cable 5 having a built-in magnetic body 21 as an applied embodiment of the present invention. As shown in FIG. 9, in the cable assembly 9, a part or all of the conductor of the flat cable 5 is made of a magnetic material 21, and the permanent magnet plate 7 or the like of the power supply device described in FIG. Due to the structure, the magnetic thin plate 8 shown in FIG. 1 becomes unnecessary, and the bending radius of the turn can be reduced, so that power can be supplied to the movable unit 10 even in a small space. Alternatively, several magnetic bodies 21 may be inserted between the conductive wires of the flat cable 5 for suction support without using them as conductive wires.

[0035]

As described above, the power supply device for the movable part according to the present invention is designed to constantly suck the cable assembly.
A magnetic pole part is provided on the guide surface on which the cable assembly on the movable part moves, and magnetism is imparted to the flat cable.
Meandering can be prevented by magnetic attraction, the bending radius can be reduced, and the storage space can be reduced. In addition, by arranging a tape-shaped guide on the contact part side of the cable assembly, the moving coil type linear motor can suppress the frictional force, improve the thrust and reduce the operating noise, protect the flat cable and improve durability Has the effect of significantly improving Moreover, by changing the thickness of the tape-shaped guide, the holding force of the cable assembly can be adjusted.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a power supply device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a power supply device for a moving coil type linear motor.

FIG. 3 is a cross-sectional view of a moving coil type linear motor provided with a dedicated permanent magnet plate for sucking a cable assembly according to an application example.

FIG. 4 shows a yoke for suction of a cable assembly according to an applied embodiment.
FIG. 2 is a cross-sectional view of a moving coil type linear motor utilizing the present invention.

FIG. 5 is a cross-sectional view of a moving coil linear motor using a yoke for suctioning a cable assembly according to an application example.

FIG. 6 shows how to generate thrust by using an isometric magnet of a stator according to an applied embodiment.
FIG. 3 is a cross-sectional view of a moving coil type linear motor that is used for both forming a magnetic field and sucking a cable assembly .

FIG. 7 has an electromagnet mover of an application example ,
Magnetic field formation and cable assembly for generating thrust
It is sectional drawing of the moving coil type linear motor also used for suction of the sea .

FIG. 8 is a cross-sectional view of a moving coil linear motor in which a cable assembly according to an application example is attracted by a yoke constituting a magnetic pole.

FIG. 9 is a perspective view showing a flat cable having a built-in magnetic body according to an application example.

FIG. 10 is a perspective view of a power supply device used in a conventional dot matrix serial printer.

FIG. 11 is a sectional view of a conventional flat cable.

FIG. 12 is an explanatory diagram of a power supply device using a conventional technique.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takaya Fujii 100 Kanayama, Ichiriyama-cho, Kariya-shi, Aichi Prefecture Inside Toyota Auto Body Co., Ltd. (72) Inventor Masaya Takahashi 100 Kanayama, Ichiriyama-cho, Kariya-shi, Aichi Prefecture Inside (72) Inventor Masahiko Kawakita 100 Kanayama, Ichiriyama-cho, Kariya-shi, Aichi Toyota Auto Body Co., Ltd. (56) Reference Jikken Sho57-31625 (JP, Y2)

Claims (4)

(57) [Claims] 1. A power supply device in which a movable portion has a guide surface for reciprocating movement, and the movable portion is electrically connected to a fixed portion by a flat cable having an arc-shaped turn formed on the fixed portion. And a magnetic pole portion capable of attracting the cable assembly is provided on the guide surface with which the cable assembly comes in contact with the reciprocating movement of the movable portion. Power supply device. 2. The power supply to the movable part according to claim 1, wherein a tape-shaped guide having a small friction coefficient and excellent abrasion resistance is superposed on a contact surface of the flat cable with the guide surface. apparatus. 3. The moving part according to claim 1, wherein the moving part is a mover of a moving coil type linear motor.
A power supply device for a movable part according to claim 1. 4. The power supply apparatus according to claim 3, wherein a magnet of a stator of the moving coil type linear motor also serves as a magnetic pole part capable of attracting the cable assembly.