JP3209636B2 - Linear DC motor and drive unit having the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear DC motor which is frequently used for moving an object to be moved with high precision in a motion mechanism such as a machine tool or an industrial robot. The present invention relates to a drive unit to which guide means for guiding an object is added.

[0002]

2. Description of the Related Art FIG. 8 shows a drive unit including a conventional linear DC motor. This drive unit is obtained by adding a guide unit for guiding an object to a linear DC motor.

As shown, the guide unit comprises a long base member 101 acting as a track rail,
It has a movable body 102 that moves along the base member 101 as a slide table. More specifically, the movable body 102 is provided with a plurality of rollers (not shown), and these rollers roll on a track (not shown) formed on the base member 101 along the longitudinal direction.

On the other hand, a linear DC motor that constitutes a drive unit together with the above-described guide unit is configured as follows.

As shown in the figure, the linear DC motor is
A primary side having a number of armature coils 107 arranged in parallel in the longitudinal direction of the base member 101 on the base member 101, and attached to the lower surface of the movable body 102 so as to face each of the armature coils 107. And a secondary side having a field magnet (not shown). Each armature coil 10
7 is wound in a rectangular ring shape and adhered to the coil substrate 108, and further fastened to the base member 101 together with the coil substrate 108 by small screws 109. Further, the field magnet has a direction in which the movable body 102 should move,
That is, N and S along the longitudinal direction of the base member 101
Are magnetized so that a plurality of magnetic poles are alternately arranged.

In the drive unit having the above-described structure,
By supplying a predetermined current to each armature coil 107, a thrust based on Fleming's left-hand rule is generated between both the primary side and the secondary side. For example, if the base member 101 to which the primary side is coupled is fixed, Movable body 10 integral with secondary side
2 is moved by this thrust.

[0007]

In the above-described conventional linear DC motor and drive unit, the coil substrate 1
When the required conductive pattern or terminal is provided on the surface opposite to the coil carrying side of 08, that is, on the upper surface,
Shorts may occur when dust such as metal powder contacts these.

The present invention has been made in view of the above points, and provides a linear DC motor and a drive unit in which insulation of a conductive portion provided on the surface of a coil substrate is completed and reliability and safety are ensured. It is intended to be.

[0009]

SUMMARY OF THE INVENTION The present invention has a flat plate shape.
Bed, a table slidable along the length of the bed
And a rail arranged along the longitudinal direction on the bed.
A pair of track rails formed with a road,
Rolling element circulation including a load track opposed to said track of Clair
An annular path, which is arranged and accommodated in the rolling element circulation path,
The table including a rolling element that circulates as the bull slides
And slides along the track rails.
A plurality of movable slides, and the
Coil substrate carrying multiple armature coils between claws
Is disposed on the primary side and the armature coil,
It is arranged on the lower surface side of the table and has different
Magnetic poles are arranged alternately and have a magnetized field magnet
A linear linear drive consisting of a secondary side and driving the table
A drive unit comprising a flow motor, wherein the coil base is provided.
The plate is a conductive plate opposite to the side on which the armature coil is supported.
The surface where the conductive parts such as turns and terminals are arranged is in front
It faces the field magnet and is not guided over the entire surface.
The conductive film is covered . Also before
The primary side supplies power to the armature coil.
Armature having a circuit board for mounting on the coil board
Unitizing the coil and the drive circuit provided on the circuit board
A plurality of coil boards and a circuit board,
Is divided for each of the unitized armature coils and drive circuits.
By doing so, they can be divided from each other. Ma
The film is attached to the coil substrate with an adhesive.
It is what is being worn.

[0010]

In such a configuration, the non-conductive film prevents the contact of the surface of the coil substrate with dust and the like.

[0011]

Next, a drive unit according to an embodiment of the present invention will be described with reference to the accompanying drawings. The driving unit includes a linear DC motor as driving means,
A guide unit serving as a guide means for carrying an object to be moved and guiding the mutual operation of the primary side and the secondary side of the linear DC motor is mutually added. In the case of the present embodiment, a movable magnet type linear DC motor is adopted as the driving means, but it is needless to say that a movable coil type linear DC motor can be applied.

Hereinafter, the guide unit will be described first.

As shown in FIGS. 1 to 3, this guide unit has a bed 1 formed as a whole as a flat plate, and a table 2 to be moved along the longitudinal direction of the bed 1. . As shown in FIGS. 1 and 3, a coil yoke 3 formed in a flat plate shape and having substantially the same length as the bed 1 is disposed on the upper surface of the bed 1, and a plurality of bolts (with a hexagonal hole) are provided. : See FIG. 3).

On both sides of the upper surface of the coil yoke 3, two track rails 7 are arranged along the longitudinal direction of the coil yoke 3, and a plurality of flat machine screws 8 (FIG.
Reference) to the coil yoke 3.

[0015] As shown in FIG.
A track groove 7a having a substantially semicircular cross-section is formed as a track on the outer side of. As is clear from FIGS. 1 and 3, a slide member 10 as a slide table which is movable relative to the track rail 7 is disposed outside the track rail 7 and, for example, 2 The table 2 is fastened to the lower surface of the table 2 by bolts (with hexagonal holes) 12. As is apparent from FIG. 3, the table 2 is formed with a counterbore 2a and an insertion hole 2b through which the head and the screw of the bolt 12 are inserted, respectively. 2a, insertion hole 2
b, and does not protrude from the upper surface of the table 2.

A rolling element circulating path (not shown) is formed in the slide member 10, and a number of balls 13 as rolling elements are arranged and accommodated in the rolling element circulating path. These balls 13 move along with the movement of the slide member 10 with respect to the track rail 7.
Circulates while rolling on the raceway groove 7a of the track rail 7
And a load is applied between the slide members 10.

As shown in FIG. 4, the slide member 10 comprises a casing 14, a pair of end caps 16a and 16b connected to both ends of the casing 14 by machine screws 15, and both end caps 16a and 16b. 16
b, two seals 17a and 17b fastened together on the outer surface
And The rolling element circulation path is formed by a casing 14.
And the load raceway groove and return path formed in a straight line in the longitudinal direction of the casing and parallel to each other, and both ends of the load raceway groove and return path formed in both end caps 16a and 16b. And a pair of substantially circular arc-shaped turning paths that communicate with each other. The load raceway groove faces the raceway groove 7a of the track rail 7.

The guide unit having the above-described structure is fastened to a flat mounting surface provided on a machine tool (not shown) by a plurality of bolts (with hexagonal holes: not shown). Therefore, as shown in FIG. 3, the bed 1 has a flat mounting bottom surface 1a for fixing the bed 1 to the mounting surface. As shown in FIGS. 1 to 3, on both sides of the bed 1 are formed a counterbore 1 b and an insertion hole 1 c through which a head and a screw of the bolt for fastening the bed are inserted, respectively. The bolt is buried in the counterbore portion 1b and the insertion hole 1c and does not protrude from the upper surface of the bed 1, and is movable with respect to the bed 1 as shown in FIGS. For example, four screw holes 2c are formed on the upper surface side of the table 2 in quadrilaterals, and a table (not shown) provided in a device such as a machine tool to which the drive unit is to be mounted is provided with these screw holes 2c. The table 2 is fastened to the table 2 by bolts (not shown) screwed into the table 2.

Next, the primary side and the secondary side of the linear DC motor mutually added to the guide unit having the above-described configuration will be described in detail.

First, on the primary side, as shown in FIGS. 1 to 3 and FIG. 5, the above-mentioned coil yoke 3 mounted on the bed 1 and the longitudinal side of the coil yoke 3 Coil substrate 20 arranged along the direction
And, for example, 14 armature coils 22 which are carried on the lower surface side of the coil substrate 20, that is, on the coil yoke 3 side, by being attached in a line along the direction in which the tables 2 are to be moved. Have. Each armature coil 22 is wound in a substantially rectangular ring shape. FIG.
As shown in FIG. 5, a Hall effect element 43 is provided on the coil substrate 20 so as to correspond to each armature coil 22.

Each of the above-mentioned armature coils 22 and coil substrate 2
0 is a small screw 24 as a fastening member, for example, two of each armature coil 22 are inserted through each of the armature coils 22.
As a result, the coil yoke 3
Has been tightened together.

As shown in FIGS. 3 and 5, between the coil substrate 20 which is tightened by the small screws 24 and the coil yoke 3 to which the small screws 24 are screwed.
A spacer assembly 26 is interposed. These spacer assemblies 26 are provided so that the coil board 20 does not deform such as warp by further tightening the small screws 24, and are fitted inside the armature coils 22.

Next, a circuit board for supplying power to each armature coil 22 described above will be described.

As shown in FIGS. 1, 3 and 5, this circuit board 30 is parallel to the coil board 20 on the lower face side of the bed 1 on which the coil board 20 is mounted via the coil yoke 3 on the upper face side. , And fastened to the bed 1 by a plurality of bolts (with hexagonal holes) 5. These bolts 5 also serve to fasten the coil yoke 3 to the bed 1.

As shown in FIG. 5, the circuit board 30 comprises:
A plurality of dividing sections 35 each having a drive circuit composed of electronic components 33, 34 and the like are connected. These divisions 35
Are provided correspondingly to two armature coils of the 14 armature coils 22 arranged in parallel, and the number is seven in this case.

The drive circuit provided in each of the dividing sections 35 includes one set of circuit portions for supplying an exciting current to one armature coil, that is, a circuit corresponding to two armature coils.

Next, the configuration of the circuit board 30 and the division of the coil board 20 disposed above the circuit board 30 will be described in detail.

First, the circuit board 30 will be described.

When manufacturing the circuit board 30, a basic board 54 having a basic length (a part of which is shown in FIG. 5) is prepared. The basic substrate 54 is formed by integrally linking, for example, six of the dividing portions 35 described with reference to FIG. As described above, these division sections 35 are provided with a drive circuit that supplies power to the two unitized armature coils 22 and the like. In addition, as shown in FIG.
A dashed line 55 is printed on each of the front and back surfaces of No. 4 (only the back surface is shown in the figure) as a mark for discriminating each division portion 35.

The circuit board 30 described above is provided with
Must be connected in a row.
One of the six divisions 35 is divided by the broken line 55 and divided, and the divided divisions 35 are arranged at one end of an undivided basic substrate 54 as shown in FIG. Is completed by connecting the mutual connection terminals.

In FIG. 5, the connection between the divided section 35 and the basic substrate 54 is made, for example, by a single terminal 57a having a terminal 57a that fits into a through hole 35b provided in a connection terminal portion between the two. This is performed by the connection component 57.
Note that the connection between the connection terminal portions may be performed using a copper wire or the like, but since connection is performed using such a connection component 57, the connection can be performed at one time, The connection part is reinforced by the rigidity of the connection part 57. In addition, as the connection component 57, a component that merely performs a conductive connection operation may be used.
And other electronic components.

Next, the coil substrate 20 will be described.

Although not shown as a whole, when manufacturing the coil substrate 20, as shown in FIG. 5, a basic substrate 59 having substantially the same length as the basic substrate 54 for the circuit board 30 is prepared. . The basic board 59 is a circuit board 3
As in the case of the basic substrate 54 for zero, six divisions 60 are integrally connected. As shown in the figure, two armature coils 22 are unitized and attached to each of the six divisions 60, and the armature coils 2 arranged side by side on the basic substrate 59.
The total number of 2 is 12. As shown in FIGS. 5 and 2, broken lines 61 are printed on both the front and back surfaces of the basic substrate 59 as marks for distinguishing these divisions 60. As shown in FIG. 5, this undivided basic substrate 5
The circuit board 30 is formed by connecting one end portion 9 of one of the divided portions 60 divided from another basic substrate (not shown). Note that in FIG.
Reference numeral 0a denotes a connection terminal provided in each of the division units 60.

In the above description, the coil substrate 2
For the 0 and the circuit board 30, two armature coils 22 and a drive circuit for driving them are unitized and divided. However, three or more armature coils and the drive circuits are unitized. May be divided. In the present embodiment, a total of 14 armature coils 22
When manufacturing a drive unit including: a basic substrate 59 carrying twelve armature coils 22 and a basic substrate 54 having a plurality of drive circuits corresponding to two of each armature coil 22 arranged side by side As a matter of course, the total length of the basic substrates 54 and 59, that is, the numbers of armature coils and drive circuits to be provided in these basic substrates 54 and 59 can be changed as appropriate.

In this embodiment, the basic substrate 5
The coil board 20 and the circuit board 30 are configured by dividing one or more of the dividing sections 35 and 60 provided in the base boards 54 and 59 and adding them to the undivided basic boards 54 and 59. When the operating stroke of the drive unit to be manufactured is shorter than the total length of the basic substrates 54, 59, one of the dividing portions 35, 60 provided on the basic substrates 54, 59 is used.
The above may be cut off as needed. In this way, it is possible to freely obtain a substrate of a desired length by cutting off a part of the divided portion from the basic substrate and adding it to another undivided basic substrate, or simply cutting off a part of the basic substrate. I can do it. Further, the remaining portion of the basic substrate, which has been partially cut off as described above, can be used in any state.

As shown in FIGS. 3 and 5, the coil board 20 and the circuit board 30 which are spaced apart from each other via the bed 1 and the coil yoke 3 are provided on the mutually facing surfaces of the two boards. A plurality of, in this case, seven, male and female connectors 63 and 64 as connecting means are connected by connecting each other. The connectors 63 and 64 are divided into two units 35 and 60 provided with the unitized armature coils 22 and the driving circuits, respectively.
, And are interconnected through openings 1e and 3e formed in the bed 1 and the coil yoke 3, as shown in FIG. As described above, since one connector 63, 64 is provided for each of the divisions 35, 60 of the coil board 20 and the circuit board 30, the direction of the two divisions 35, 60 is set when assembling the two divisions 35, 60 together. The operation can be quickly and easily recognized, and the work becomes easy. It should be noted that the connection between the two dividing portions 35 and 60 may be performed by a conductive wire instead of the connector as described above. The number of connectors to be provided is not limited to one for each of the divisions 35 and 60 as described above, and may be two or more.

On the other hand, the secondary side of the linear DC motor is configured as follows.

As shown in FIGS. 1 and 3, the secondary side
Magnet yoke 68 fixed to the lower surface of table 2
And a field magnet 69 fixed to the lower surface of the magnet yoke 68 so as to face each of the armature coils 22 on the primary side. As shown in FIG. 6, the field magnet 69 is formed in a rectangular plate shape as a whole, and is N and S along the direction A in which the primary side and the secondary side are relatively moved, that is, along the longitudinal direction of the bed 1. Are arranged and magnetized so that a plurality of, for example, five poles are alternately arranged.

In the drive unit, the following structure is provided as position detecting means for detecting the relative positions of the bed 1 and the table 2.

That is, the position detecting means comprises a linear magnetic scale 71 shown in FIGS. 1 to 3 and a magnetic sensor 72 shown in FIG. The linear magnetic scale 71
The table 2 is extended in the moving direction of the table 2, and N and S magnetic poles are alternately multipole magnetized at a fine pitch along the longitudinal direction, and an origin signal magnetized portion is formed at one end. In the magnetic sensor unit 72, a Hall effect element for detecting the origin is provided, and the other two Hall effect elements of the A phase and the B phase are arranged so as to be shifted from each other by a half of the pitch. With this configuration, signals of the A phase and the B phase are obtained, and the detection of the relative position and the determination of the moving direction can be performed. As shown in FIGS. 1 to 3, a flexible board 74 as a cable for taking out signals from the magnetic sensor section 72,
Is provided.

In the drive unit having the above configuration,
By supplying a predetermined current to the armature coil 22,
A thrust based on Fleming's left hand rule is generated between the primary side and the secondary side. For example, if the bed 1 to which the primary side is connected is fixed, the table 2 integrated with the secondary side is moved by this thrust. Then, the position of the table 2 with respect to the bed 1 is detected by the above-described position detecting means.

By the way, in the drive unit,
The following configuration is added to the configuration described so far.

As is clear from FIGS. 1, 3 and 5,
A film 81 is provided on the entire upper surface of the coil substrate 20, that is, on the surface opposite to the coil carrying side. However, FIGS. 1 and 5 show a state where a part of the film 81 is peeled off from the surface of the coil substrate 20. This film 81 is formed of a material such as vinyl chloride or polyester, and is non-conductive. As shown in FIG. 7, an adhesive 81a is previously adhered to one surface thereof at a predetermined thickness. It is attached to the coil substrate 20. In addition, the thickness of the film 81 itself is set to, for example, about 0.08 to 0.3 mm, and the width and the length are also set freely. The film 81 is translucent, for example, and is colored light blue. However, it may be completely transparent and non-colored, or may be opaque.

The film 81 is provided for the following reason.

That is, in this embodiment, conductive patterns such as for supplying power to the armature coils 22 and the Hall effect element 43 and conductive patterns such as terminals (both not shown) are provided on the upper surface of the coil substrate 20. The parts are provided by using a technique such as etching. The film 81 is provided for this purpose. By providing the film 81, the contact of the surface of the coil substrate with dust and the like is interrupted, the insulation of these conductive portions is completed, and there is no fear of causing a short circuit. And safety is increasing. As an insulating measure, an insulating film is formed by applying a liquid insulating agent on the conductive portion and solidifying the insulating material. By using the insulating film and the film 81 together, a reliable insulation is obtained. It can be carried out.

In this embodiment, the film 8
1 is colored light blue, but in addition, it is colored in various colors such as white and yellow, and aesthetics can be obtained by appropriately selecting and using a desired film among these. Another advantage is that discrimination is easy when a large number of linear DC motors and drive units are manufactured or used.

Further, in the linear DC motor according to the present invention, as described above, the circuit board 30 for supplying power to the armature coil 22 is provided, and the armature coil provided on the coil board 20 is provided. 22 and a plurality of drive circuits provided on the circuit board 30 are unitized and arranged in a unitary manner, and the coil board 20 and the circuit board 30 are divided for each unitized armature coil 22 and each drive circuit. By doing so, they can be divided from each other. That is, two or more armature coils 22 having a basic length and basic boards 54 and 59 divided for each drive circuit are prepared, and each of the divided sections 35 and 60 of each basic board is prepared. The linear DC motor should be equipped by dividing at least one to connect with the undivided basic substrates 54, 59, or by cutting and shortening one or more divisions 35, 60 of the basic substrate. This is to obtain an optimum stroke that matches an operation stroke required by a device such as a machine tool. In such a configuration, when the dividing portions 35 and 60 divided from the basic substrates 54 and 59 for obtaining a relatively large stroke are connected to another undivided basic substrate, the connecting portions such as the conductive patterns are used at the connecting portions. A part of the conductive part is exposed. Even when the above-described liquid insulating agent is applied in advance, the insulating agent in this portion is broken by dividing and cutting the basic substrate, and the conductive portion is exposed. Since the above-mentioned non-conductive film completely covers the connection portion, the insulating property is not impaired.

In the linear DC motor according to the present invention, the film 81 is adhered to the coil substrate 20 with an adhesive 81a. Therefore, the mounting of the film 81 on the coil substrate 20 is extremely easy, and even if, for example, a connection failure of the conductive pattern or the like occurs after the film 81 is pasted and it is necessary to peel it off to detect this, this can be easily performed. The test can be performed immediately after the inspection.

On the other hand, in the drive unit according to the present invention, guide means for mutually guiding the primary side and the secondary side of the linear DC motor are configured as follows.

That is, a track is formed along the longitudinal direction and a track rail 7 connected to one of the primary side and the secondary side, in this case, the primary side, and a relative movement with respect to the track rail 7 And a slide member 10 as a slide table which is freely coupled to the secondary side which is the other side of the one. In such a contact type guiding means, it is particularly effective to provide the above-described film 81 because dust is likely to be generated with the operation.

Further, since the film 81 is an extremely thin member, the thickness of the linear DC motor and the drive unit does not increase.

In the above-described embodiment, the guide unit having a mechanical structure is shown as the guide means for mutually guiding the primary side and the secondary side. However, the guide unit is formed by the pressure of the fluid (air or oil) or the magnetic force of the magnet. The guide means may be configured to relatively float the two.

Further, as another embodiment, the present invention can be similarly applied to a case where the bed 1 or the like has a certain curvature and performs a curved motion.

[0054]

As described above, according to the present invention, since the contact of the surface of the coil substrate with dust and the like is blocked by the non-conductive film, the surface of the coil substrate is provided with conductive portions such as conductive patterns and terminals. In this case, the insulation of the conductive portion is completed, and the effect of increasing reliability and safety is obtained. In addition, the film can be colored in various ways, and by selecting and using a desired film as appropriate, an aesthetic effect can be obtained. In addition, it is easy to distinguish when a large number of linear DC motors and drive units are manufactured or used. There is also an effect that becomes. Furthermore, in the linear DC motor according to the present invention, a circuit board for supplying power to the armature coil and the like is provided, and the armature coil provided on the coil board and the drive circuit provided on the circuit board are provided. The coil substrate and the circuit board are divided into unitary armature coils and drive circuits so that they can be divided from each other. That is, a coil board and a circuit board are prepared as basic boards having a basic length and divided into two or more armature coils and drive circuits thereof, and at least one of the divided portions of each board is prepared. A device such as a machine tool to be equipped with the linear DC motor is required by dividing the basic DC and connecting it to an undivided basic substrate, or by cutting and shortening one or more divisions of the basic substrate. Thus, an optimum stroke matching the working stroke to be obtained is obtained. In such a configuration, when a divided portion divided from a certain basic substrate to obtain a relatively large stroke is connected to another undivided basic substrate, a part of a conductive portion such as a conductive pattern is exposed at this connection portion. Will be done. Since the above non-conductive film completely covers the connection portion,
The insulation is not impaired. In the linear DC motor according to the present invention, the film is attached to the coil substrate with an adhesive. Therefore,
The mounting of the film on the coil substrate is extremely easy, and even after the film is once adhered, for example, if a connection failure of the conductive pattern or the like occurs and it is necessary to peel it off for inspection, this can be easily performed. It is possible to adhere again immediately after the inspection. On the other hand, in the drive unit according to the present invention, guide means for mutually guiding the primary side and the secondary side of the linear DC motor are configured as follows. That is, a track rail formed along the longitudinal direction and coupled to either the primary side or the secondary side, and a relative movement to the track rail and relative to the other relative to the other. And a coupled slide table. In such a contact type guide means, dust is likely to be generated with its operation,
Providing a film as described above is particularly effective.
Further, since the film is an extremely thin member, the thickness of the linear DC motor and the drive unit does not increase.

[Brief description of the drawings]

FIG. 1 is a perspective view including a partial cross section of a drive unit according to an embodiment of the present invention.

FIG. 2 is a plan view of the drive unit shown in FIG.

FIG. 3 is a view including a partial cross-section taken along the line BB in FIG. 2;

FIG. 4 is a perspective view including a partial cross section of a track rail and a slide member included in the drive unit shown in FIGS. 1 to 3;

FIG. 5 is a perspective exploded perspective view including a partial cross section of a main part of a linear DC motor included in the drive unit shown in FIGS. 1 to 3;

FIG. 6 is a perspective view of a field magnet which is a secondary-side component of the linear DC motor included in the drive unit shown in FIGS. 1 to 3;

FIG. 7 is a perspective view of a part of an insulating film included in the drive unit shown in FIGS. 1 to 3;

FIG. 8 is a perspective view of a main part of a conventional drive unit.

[Explanation of symbols]

 Reference Signs List 1 bed 2 table 3 coil yoke 7 track rail 10 slide member (slide table) 13 ball (rolling element) 20 coil board 22 armature coil 30 circuit board 33, 34 electronic component 35 division section 43 hall effect element 54 basic board (For circuit board) 59 basic board (for coil board) 60 division section 68 magnet yoke 69 field magnet 71 linear magnetic scale 72 magnetic sensor section 74 flexible board 81 film

Claims (3)

(57) [Claims] 1. A bed having a flat plate shape, and the length of the bed
A table slidable along the direction, the table on the bed
A pair of tracks arranged along the longitudinal direction to form a track
Track rail, facing the track of the track rail
Rolling element circulation having a rolling element circulation path including a rotating load track
It is arranged and accommodated in the road and circulates as the table slides.
The rolling element is fixed to the lower surface side of the table,
A plurality of slides slidable along each track rail,
And a plurality of armatures between the track rails on the bed
A primary side on which a coil substrate carrying a coil is disposed;
It is arranged on the lower surface side of the table facing the armature coil.
The different magnetic poles are alternately arranged along the longitudinal direction.
And a secondary side having an inclined field magnet.
Drive unit equipped with a linear DC motor
A Tsu bets, the coil substrate, opposite to the carrying side of said armature coils
Conductive parts such as conductive patterns and terminals
The surface facing the field magnet,
It is featured that a non-conductive film is
A drive unit equipped with a linear DC motor. 2. The method according to claim 1, wherein the primary side has a circuit board for supplying power to the armature coil and the like, and an armature coil provided on the coil board and a drive circuit provided on the circuit board. 2. A plurality of the coil boards and the circuit board are arranged integrally and connected to each other, and the coil board and the circuit board are divided by the unitized armature coil and the driving circuit so that they can be divided from each other. The linear DC motor described
Drive unit provided . 3. A drive unit comprising a linear DC motor according to claim 1, wherein said film is adhered to said coil substrate with an adhesive.
G.