JPH0723979U - Voice coil type linear motor - Google Patents

Abstract

(57) [Abstract] [Purpose] The installation space is reduced by incorporating a power supply line formed of a flexible printed wiring board having flexibility. [Structure] Side yokes 11 each having a cylindrical shape,
The center yoke 12 and the permanent magnet 13 form a coaxial cylindrical stator 2 and the cylindrical winding 14 and the winding frame 15 form a coaxial movable member 3, respectively. In the yoke 12, the permanent magnet 13, and the side yoke 11, the power supply line 5 is housed in the space 20 formed by the surfaces facing each other.
The power supply line output part 26 is electrically connected to the winding wire 14 to fix the power supply line input part 25 to a part of the outer cylindrical surface of the side yoke 11, and the power supply line 5 together with the mover 3 in the space 20 is indicated by an arrow. A
The structure is such that it can move smoothly in the direction or arrow B direction.

Description

[Detailed description of the device] [0001]     [Industrial applications]   The present invention includes a handling device, a catching device, an inspection device (various contacts). Probes), optical devices (various mirrors), detectors (various sensors) or Easy installation in a small installation space used for moving recording devices (various pens, etc.) The present invention relates to a voice coil type linear motor capable of performing. [0002]     [Prior art]   FIG. 7 shows an example of the structure and installation method of a conventional voice coil type linear motor. It will be explained based on. [0003]   The voice coil type linear motor 1 has side yokes 11 each having a cylindrical shape. , A stator composed of a center yoke 12 and a permanent magnet 13 in a coaxial cylindrical shape 2 and a winding 14 and a winding holding member 15 each having a cylindrical shape, a coaxial cylindrical shape And the mover 3 configured as above. [0004]   The stator 2 has a cylindrical center yoke 12 and the periphery of the center yoke 12. And a side yoke 11 arranged in a coaxial cylindrical shape at a predetermined distance from each other, and a side yoke. And a cylindrical permanent magnet 13 fixed to the inner cylindrical surface of the ark 11. , Facing the outer cylindrical surface of the center yoke 12 with a predetermined gap, respectively, A circle formed by the inner cylindrical surface of the magnet 13 and a part of the inner cylindrical surface of the side yoke 11. A fixed magnetic circuit is formed through the void 20 having a cylindrical shape. [0005]   The mover 3 has a cylindrical shape having an opening at one axial end formed by the fixed magnetic circuit. A part of the center yoke 12 is housed in the void 20 that forms a smooth axial movement. The winding 14 and the winding holding member 15 each having a cylindrical structure and having a cylindrical shape. It is configured as a coaxial cylinder. The winding holding member 15 is flexible with the load attachment member 4. And a power supply line 5 formed by a flexible printed wiring board having The load 6 and the movable portion 8 of the bearing device 7 are fixed to the mounting member 4, and the stator 2 and the shaft are fixed. The fixing portion 9 of the receiving device 7 is fixed to the motor mounting member 10, respectively. [0006]   A voltage having a predetermined polarity or a voltage having a reverse polarity is applied to the power supply line 5. As a result, the mover 3 and the load 6 move in the space 20 through the load mounting member 4 and the shaft. In the state of being supported by the receiving device 7, the movable portion 8 of the bearing device 7 and the power supply line 5 together with the arrow A direction Or move in the direction of arrow B. [0007]   Generally, a winding holding member 1 that constitutes a mover 3 of a voice coil type linear motor 1. A part of 5 is equipped with a terminal or connector for supplying power and a load 6 or A mechanism for mounting the movable element 3 and a supporting device or a bearing device for the mover 3 as necessary. And a coil spring or the like for holding the mover 3 in a predetermined position when the power is not supplied. In addition, it is necessary to attach a position detection device during servo control operation. The arrangement becomes extremely complicated. [0008]   Further, the terminal or the connector is provided with a power supply line for supplying electric power to the winding 14. 5 connections are required. Since the power supply line 5 moves as the mover 3 moves, When moving, it acts as a load on the voice coil type linear motor 1. Effect of load In order to further reduce the It has a problem that requires space. [0009]     [Problems to be solved by the device]   The problem to be solved is that many parts are concentrated and mounted on a part of the mover 3. In addition, when installing the voice coil type linear motor 1, the movement space of the power supply line 5 is changed. This is a point that must be taken into consideration. [0010]     [Means for Solving the Problems]   The voice coil type linear motor of the present invention is equipped with a power supply line inside and is stored. The main feature is to disperse the components that are concentrated in one part and In addition, it is possible to eliminate the movement space of the power supply line around the voice coil type linear motor. It is a Noh play. [0011]     [Action]   The voice coil type linear motor of the present invention has a small number of units that form a fixed magnetic circuit. Even without a stator, the stator is configured as a coaxial cylinder by one or more yokes and permanent magnets. In a cylindrical void having an opening at one axial end formed by the fixed magnetic circuit The power supply line is housed in a part of the. [0012]   Outside of the center yoke 12 of the conventional voice coil type linear motor 1 shown in FIG. Of the space 20 formed by the cylindrical surface and a part of the inner cylindrical surface of the side yoke 11. The axial length reduces the leakage flux from the permanent magnet 13 located there. For the purpose, the outer cylindrical surface of the center yoke 12 and the inner cylindrical surface of the permanent magnet 13 are separated from each other. The boiler of the present invention shown in FIGS. 4 and 5 is configured to be longer than the length of the gap, which is the separation distance. It is large enough to accommodate the power supply line 5 attached to the coil type linear motor 1. It is something. [0013]   A conventional structure having the same structure as the voice coil type linear motor 1 of the present invention shown in FIG. In the voice coil type linear motor, the outer cylindrical surface and the side of the permanent magnet 13 are The gap 20 formed by the inner cylindrical surface of the yoke 11 is the original space shown in FIGS. 4 and 5. Large enough to accommodate the power supply line 5 attached to the bright voice coil linear motor 1 It has a certainness. [0014]   That is, the shape, mass and dimensions of the conventional voice coil type linear motor 1 are changed. The power supply line 5 that was installed outside without changing the voice coil type linear motor. By mounting the load 6 on the mover 3 and the bearing device 7 etc. This makes the installation space extremely small and the total installation space is extremely small. [0015]     【Example】   An embodiment of the present invention will be described with reference to FIGS. [0016]   1, 2 and 4 show a first embodiment of the present invention. Figure 1 is inside 2A is a cross-sectional view showing the partial structure, FIG. 2A is a view taken in the direction of arrow C in FIG. 1, and FIG. 2 shows a part of the bottom of FIG. 2 (a), and FIG. 4 shows a feeder line. [0017]   The voice coil type linear motor 1 has side yokes 11 each having a cylindrical shape. , A stator composed of a center yoke 12 and a permanent magnet 13 in a coaxial cylindrical shape 2 and a winding 14 and a winding holding member 15 each having a cylindrical shape, a coaxial cylindrical shape And the mover 3 configured as above. [0018]   The stator 2 has a cylindrical center yoke 12 and the periphery of the center yoke 12. And a side yoke 11 arranged in a coaxial cylindrical shape at a predetermined distance from each other, and a side yoke. And a cylindrical permanent magnet 13 fixed to the inner cylindrical surface of the ark 11. , Facing the outer cylindrical surface of the center yoke 12 with a predetermined gap, respectively, A circle formed by the inner cylindrical surface of the magnet 13 and a part of the inner cylindrical surface of the side yoke 11. A fixed magnetic circuit is formed through the void 20 having a cylindrical shape. [0019]   The power supply line 5 is formed by a flexible printed wiring board having a spiral flexibility. The inner end portion constitutes the power supply line output portion 26, and the end of the winding 14 is soldered or the like. Connection hole 30 for the purpose of electrically connecting The portion 25 is configured and an electric wire for supplying electric power from the outside is electrically connected by soldering or the like. The conductor 29, which has the purpose of connecting to the For fixing to a part of the outer cylindrical surface of the yoke 11 by the power supply line fixing screw 27. A mounting hole 28 is provided. [0020]   The power supply line 5 is configured as described above, and the power supply line output unit 26 is connected to the winding holding member 15. The power supply line input unit 25 is fixed to a part of the side by mechanically or by adhesive. It is fixed to a part of the outer cylindrical surface of the yoke 11 by a power supply line fixing screw 27. [0021]   The mover 3 is flexible and has flexibility in the space 20 formed by the stator 2. Along with the power supply line 5 formed of the printed wiring board, the conductor 29 of the power supply line input section 25 is provided. By applying a voltage with a constant polarity or a voltage with the opposite polarity, the arrow Move in the direction of mark A or in the direction of arrow B. [0022]   3 and 5 show a second embodiment of the present invention. Figure 3 (a) is inside FIG. 3B is a cross-sectional view showing the partial structure, and FIG. 3B shows the bottom of FIG. FIG. 5 is a perspective view showing a mounted state of the power supply line. [0023]   The voice coil type linear motor 1 has side yokes 11 each having a cylindrical shape. , A stator composed of a center yoke 12 and a permanent magnet 13 in a coaxial cylindrical shape 2 and a winding 14 and a winding holding member 15 each having a cylindrical shape, a coaxial cylindrical shape And the mover 3 configured as above. The side yoke 11 has a cylindrical shape. And a disk-shaped member that forms the bottom of the stator 2. [0024]   The stator 2 includes an outer cylindrical surface of the center yoke 12 and the permanent magnet 13 and side walls. A cylindrical void 20 having an opening 19 defined by the inner cylindrical surface of the yoke 11 Through the side yoke 11, center yoke 12 and permanent magnet 13 Form a fixed magnetic circuit. [0025]   The power supply line 5 is formed of a flexible printed wiring board having a strip-like flexibility. One end portion of the winding wire 14 constitutes the feeder line output portion 26, and the end of the winding wire 14 is soldered or the like. Connection hole 30 for the purpose of electrical connection is provided, and the other end is An eye that constitutes the force section 25 and electrically connects an electric wire or the like for supplying electric power from the outside. For fixing the conductive conductor 29 and the power feed line input part 25 to the bottom of the stator 2 A hole 28 is provided. [0026]   The power supply line 5 is configured as described above, and has a space 20 formed on the outer periphery of the permanent magnet 13. It is installed in a spiral shape inside. The power supply line output part 26 is provided on a part of the winding holding member 15 as a machine. Of the side yoke 11 or Through a part of the disk-shaped member constituting the, to the outside of the disk-shaped member It is electrically insulated and fixed by the power supply line fixing screw 27. [0027]   The mover 3 has flexibility arranged in a spiral shape in the space 20 formed by the stator 2. The power supply line 5 and the power supply line 5 formed by the flexible printed wiring board have A voltage having a predetermined polarity or a voltage having a reverse polarity is applied to the conductor 29 of 25 By doing so, it moves in the arrow A direction or the arrow B direction. [0028]   FIG. 6 shows a third embodiment of the present invention, which is the first embodiment of the present invention shown in FIG. In the feed line 5 housed in the space 20 of the voice coil type linear motor 1 showing the embodiment, A disk-shaped member 31 to which the spring 35 is attached and which constitutes a part of the side yoke 11. The internal structure of the voice coil type linear motor 1 in which the connector 32 is attached to a part of the It is something. [0029]   The power supply line 5 is formed by a flexible printed wiring board having a spiral flexibility. To be done. The inner end of the power supply line 5 is mechanically or bonded to a part of the winding holding member 15. The terminal 40 of the winding wire 14 is fixed to the connection hole 30 by soldering or the like. Be connected spiritually. The outer end of the power supply line 5 is fixed to the fixing screw 38 via the mounting hole 34. It is fixed to the member 31 together with the spring 35 by means of the 37 is electrically connected by soldering. The spring 35 adheres to the entire surface of the power supply line 5. It is fixed with an agent or the like, and is fixed together with the power supply line 5 by the fixing screw 38 through the mounting hole 36. , Which is fixed to the member 31 by the mounting hole 39 and holds the power supply line 5 in the direction of arrow A. To use [0030]   Generally, a side yoke 11 and a center yaw formed by a plurality of members 12 are mechanically and magnetically connected by press fitting or screws. However, it is usually formed by sintering a metal with good magnetic properties or by lost wax. Physically formed. [0031]   The permanent magnet 13 shown in FIG. 1, the permanent magnet 13 shown in FIG. 7, and the permanent magnet used in FIG. The magnets are magnetized in the radial direction, and usually a plurality of permanent magnets are arranged inside the side yoke 11. It is fixed to the cylindrical surface with an adhesive or the like to form a cylindrical shape. The permanent magnet 13 shown in FIG. It is magnetized in the axial direction. [0032]   The mover 3 normally forms the winding 14 by winding a predetermined number of wire rods around the winding holding member 15. The winding 14 formed by the self-bonding wire is made of various synthetic resins. Alternatively, the winding 14 and the winding holding member 15 may be integrally formed by an insert molding. Of. [0033]     [Effect of device]   The voice coil type linear motor 1 of the present invention is provided with a feed coil which moves with the mover 3 inside. The electric wire 5 is attached and stored, and the following effects can be obtained. (1) Load 6, bearing device 7, position detection device, and mover mounted on mover 3 The degree of freedom in arranging the holding spring 3 and the like increases. (2) By attaching the spring 35 to the power supply line 5 of the present invention, No holding spring is required. (3) The load 6 can be easily attached and fixed to the mover 3. (4) Restrictions on the shape, size and type of the load 6 are reduced. (5) The installation space for the voice coil type linear motor 1 is reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing a first embodiment of a voice coil type linear motor of the present invention. FIG. 2 is a view on arrow in FIG. FIG. 2A shows C of FIG.
FIG. 2B is a view as seen from an arrow, and FIG. 2B shows a part of the bottom portion of FIG. FIG. 3 is a sectional view showing a second embodiment of a voice coil type linear motor of the present invention. 3A is a sectional view showing the internal structure, and FIG. 3B shows the bottom of FIG. 3B. FIG. 4 is an explanatory view of the shape of the power supply line of the first embodiment of the voice coil type linear motor of the present invention. FIG. 5 is an explanatory view of the shape of the power supply line of the second embodiment of the voice coil type linear motor of the present invention. FIG. 6 is a perspective view showing a voice coil type linear motor according to a third embodiment of the present invention. FIG. 7 is a sectional view for the purpose of explaining the structure and installation method of a conventional voice coil type linear motor. [Description of Reference Signs] 1 voice coil type linear motor 2 stator 3 mover 4 load mounting member 5 power supply line 6 load 7 bearing device 8 movable part 9 fixed part 10 motor mounting member 11 side yoke 12 center yoke 13 permanent magnet 14 Winding 15 Winding holding member 19 Opening 20 Air gap 25 Feed line input section 26 Feed line output section 27 Feed line fixing screw 28 Mounting hole 29 Conductor 30 Connection hole 31 Member 32 Connector 33 Connection hole 34 Mounting hole 35 Spring 36 Mounting hole 37 terminal 38 fixing screw 39 mounting hole 40 terminal

Claims (1)

Claims for utility model registration: Claim 1. A fixed magnetic circuit is formed by a stator formed in a coaxial cylindrical shape by at least one or more yokes and permanent magnets. Windings and windings each having a cylindrical shape having a structure in which a part of the stator is housed through the opening in a void having a cylindrical shape having an opening at one end in the axial direction and which is movable in the axial direction. In a voice coil type linear motor including a mover configured in a coaxial cylindrical shape by a holding member, a power feed line formed by a flexible printed wiring board having flexibility is housed in a part of the gap, One end of the yoke is electrically insulated and fixed to a part of the winding holding member to be electrically connected to the winding, and the other end of the power supply line is disposed around the mover. Through the part A voice coil type linear motor, characterized by fixation were electrically insulated part of the outer over click. 2. A steel according to claim 1, wherein a spring is mounted on a part of the power supply line and is housed together with the power supply line in a part of the gap, and one end of the spring is provided on a part of the mover and the other of the spring. 2. One end of each of the stators is fixed to a part of the stator forming the gap, or one of them is fixed.
Voice coil type linear motor. 3. One end of the power supply line according to claim 1 and claim 2 is electrically insulated and fixed to a part of the mover to be electrically connected to the winding, and the other end of the power supply line. 3. The voice coil type linear motor according to claim 1 or 2, wherein is electrically connected to a connector mounted on the yoke by penetrating the yoke arranged around the mover.