JPH025662Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a stator for a motor used in a tape recorder, etc., and particularly in a stator that incorporates a drive control circuit board for controlling the drive current flowing through the drive coil of the motor. This is an improved structure that allows the circuit board to be easily attached to a coil bobbin wound with a winding wire.

Traditionally, brushless motors used in tape recorders and the like use a stator in which a drive control circuit board for controlling the drive current flowing through the drive coil is attached and fixed to the coil bobbin of the stator winding. . Conventionally, means such as fixing with an adhesive or screwing have been used to attach the circuit board.

However, when using any of these conventional means, the position in the thrust direction becomes unstable due to the accumulation of tolerances between parts, and in particular, when fixing with adhesive, the temporary fixing required to perform the bonding is extremely time-consuming. This is troublesome and requires a separate jig for temporary fixing. After the adhesive is injected, the bobbin and circuit board must be placed in a curing device and cured for a predetermined curing time. However, the method using such an adhesive has the disadvantage that both the bobbin and the circuit board cannot be removed after bonding to easily maintain or inspect the coil portion and circuit connection portion.

Further, when screwing is used, there is a drawback that the installation workability is poor and the assembly time becomes long.

Therefore, in view of the above-mentioned conventional problems, the present invention makes assembly and disassembly easier by fixing the circuit board using a mounting member that fits into the hollow part of the coil bobbin of the stator winding. The present invention provides a motor stator having a novel configuration.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below using drawings showing an embodiment of a motor to which a stator according to the present invention is applied.

FIG. 1 is an exploded perspective view of a motor equipped with a stator according to the present invention. configured.

The stator side block 100 includes a bracket 101 that serves as an attachment support member to the motor case 400, and the above-mentioned bracket 1 as shown in FIG.
Bearing housing 1 caulked to the center of 01
02 and a drive coil 10 which is a stator-side block that is fitted and arranged in this bearing housing 102.
3 wound around the coil bobbin 017, and a circuit board support member 129 disposed on the upper end surface side of the coil bobbin 107 and fitted on the upper end surface side of the coil bobbin 107. It is composed of a circuit board 104.

By the way, the bearing housing 102 has a fitting cylindrical portion 110a that protrudes from the tip of a locking protrusion 111 that is annularly formed on the outer periphery of the upper end of the cylindrical body 110.
By penetrating the center hole 105 of the bracket 101 and bending it back toward the outer periphery, the bent fitting cylinder portion 110a and the locking protrusion 111 are used to secure the center hole 105 of the bracket 101. The bracket 101 is clamped around the periphery.
It is swaged and supported as shown in FIGS. 2 and 4.

Further, the cylindrical body 11 of the bearing housing 102
Bearings 114 and 115 that support the rotating shaft 203 are fitted into the upper and lower ends of the cylindrical hole 113, respectively, as described later. These bearings 114,1
For 15, an oil-impregnated metal, a ball bearing, or the like is used.

Furthermore, the cylindrical body 110 of the bearing housing 102
A hook-shaped notch 116 is provided on the outer periphery of the lower end side, with which a hook-shaped projection 123 formed on the lower end side of the coil bobbin 107 that is inserted and disposed in this cylindrical body 110 is relatively engaged.
is formed. As shown in FIG. 2, this hook-shaped notch 116 has a surface 117 perpendicular to the outer peripheral surface of the cylindrical body 110 and a parallel surface 118 continuous thereto.
and an inclined surface 119 continuous to the parallel surface 118, forming a hook shape.

On the other hand, as shown in FIG. 5, the bobbin 107 attached to the outer periphery of the bearing housing 102 includes a cylindrical body 121 made of a relatively hard material such as synthetic resin, and a flange 12 that stands up on the outer periphery of the cylindrical body 121.
2 is formed. A hook-shaped protrusion 123 is formed at one end of the cylindrical body 121, which is somewhat smaller than the inner diameter of the through hole and protrudes in segments. As is clear from FIG. 2, this hook-shaped projection 123 is provided with a vertical surface 125 continuing from the horizontal end surface 124 of the cylindrical body 121 and an inclined surface 126 continuing therefrom. An annular yoke 108 made of a ferromagnetic material and around which the drive coil 103 is wound is inserted into the cylindrical body 121 and fitted into the collar piece 122 . On the other hand, a coil suppressing member 141 is fitted to the other end of the cylindrical body 121 through which the yoke 108 is inserted, which is opposite to one end where the flange 122 is formed. This coil suppressing member 141 is composed of a collar portion 142 and a cylindrical protrusion 143. Then, the cylindrical body 121 is arranged so that the coil suppressing member 141 covers the vicinity of the upper and lower ends of the yoke 108.
is fitted to form a bobbin 107, and the drive coil 103 is wound around this bobbin 107. The drive coil 103 is connected to the flange 14 of the coil suppressing member 141.
2 notch 144 and flange 122 notch 124
each flange 142 of the coil suppressing member 141.
Then, it is wound around each collar portion 122 on one end side of the bobbin 107, as shown in FIG.

Then, the cylindrical body 110 of the bearing housing 102
A control circuit board 104 having a through hole 135 is disposed on the upper end surface side of the hollow coil bobbin 107 which is inserted into the coil bobbin 107 . This control circuit board 104
A fitting cylindrical portion 128 and an annular flange 130 formed protruding from the outer periphery of the upper end of the fitting cylindrical portion 128 are inserted into the through hole 135 and formed in the fitting recess 127 on the upper end side of the coil bobbin 107. The coil bobbin 107 is pressed and supported on the upper end surface of the coil bobbin 107 by a circuit board support member 129. That is,
By fitting the fitting cylinder portion 128 into the fitting recess 127 on the upper end side of the coil bobbin 107 through the through hole 135 and attaching the circuit board support member 129, the control circuit board 104 is attached to the circuit board support member 129. It is supported by being sandwiched between the annular flange 130 and the upper end surface of the coil bobbin 107.

The fitting recess 127 formed on the upper end side of the coil bobbin 107 has a slightly smaller diameter than the outer diameter of the fitting cylinder part 128 of the circuit board support member 129, and when the fitting cylinder part 128 is fitted, This fitting cylindrical portion 128 is elastically deformed and held so as to reduce its diameter.

Further, one protrusion 134 is provided on the upper end surface of the coil suppressing member 141, and this protrusion 134 fits into a notch 137 of the control circuit board 104.
Then, the mounting positions of the control circuit board 104 and the bobbin 107 are determined.

In this way, the control circuit board 1 is attached to the bobbin 107.
04 has advantages such as superior workability and ease of maintenance and inspection of circuit parts by disassembly compared to conventional methods that use adhesive or separate mounting parts such as screws. be.

Further, between the annular flange 130 of the circuit board support member 129 and the locking protrusion 102 formed on the outer periphery of the upper end of the bearing housing 102, the coil bobbin 107 is placed on the hook-shaped notch 116 side of the lower end of the bearing housing 102. A coil spring 131 is inserted, which is pressed and biased. That is,
This coil spring 131 is connected to the hook-shaped notch 11
The horizontal end surface 124 of the hook-shaped protrusion 123 is strongly pressed against the vertical surface 117 of the bearing housing 102, thereby absorbing the mounting looseness of the bobbin 107 with respect to the bearing housing 102 and positioning the bobbin 107. The vertical surface 117 and the horizontal end surface 124 constitute a mounting reference surface for these two parts.

Here, the order in which the bobbin 107 is attached to the bearing housing 102 will be explained. First, the coil spring 131 is fitted into the bearing housing 102, and the bobbin 107 is inserted.
is inserted into the bearing housing 102 from the circuit board support member 129 side. The relationship between the hook-shaped notch 116 and the hook-shaped projection 123 in this case is shown in FIG. 8A.
As shown in the figure, they are in a confrontational state. When the bobbin 107 is further pushed in against the elastic force of the coil spring 131, the hook-shaped protrusion 123 has an inclined surface 126 that touches the lower end edge of the bearing housing 102, as shown in FIG. 8B. It will be expanded in. Furthermore, by continuing the pushing, the hook-shaped protrusion 123 falls into the hook-shaped notch 116 due to its restoring force, and by releasing the pushing of the bobbin 107, the coil spring 131 becomes resilient. In response to the force, the horizontal end surface 124 of the hook-shaped protrusion 123 moves to the vertical surface 117 of the hook-shaped notch 116 as shown in FIG. 8C.
It feels like I'm being pressed against something. For this reason bobbin 10
7 with respect to the bearing housing 102 in the thrust direction can be stably maintained, and the fixation can be performed simply and quickly without using conventional parts such as adhesives or screws.

Further, the drive coil 103 wound around the bobbin 107 is connected to the circuit formed on the control circuit board 104 assembled to the cylindrical body 121 of the bobbin 107 by the circuit board support member 129. is the control circuit board 104 and the bobbin 10.
7 is constructed as follows.

That is, on the end surface of the cylindrical body 121 of the bobbin 107, four notches 133 are provided in the axial direction so as to pass through the inside and outside of the bobbin 107, corresponding to the number of lead wires 132 of the drive coil 102. , a protrusion 134 is provided at at least one location between these notches 133. on the other hand,
The inner peripheral surface of the through hole 135 of the control circuit board 104 has four notches 13 corresponding to the notches 133 described above.
6 and the projection 134 are provided with a notch 137 of approximately the same size. And the above bobbin 10
In order to fit the control circuit board 104 to 7,
The control circuit board 104 is brought into contact with the end surface of the bobbin 107 so that the notch 137 fits into the protrusion 134 . Then, the above bobbin 10
7 notch 133 and circuit control board 104 notch 1
36 face each other, and the bobbin 1
The outer periphery of 07 and the upper part of the control circuit board 104 are communicated with each other through a through hole. In this way, the lead wires 132 of the drive coil 102 are first focused into the cylindrical body of the bobbin 107 through the notch 133 of the bobbin 107, and then these are focused into the through hole 135 of the control circuit board 104. Pass the drawer lead wire 132 through the bobbin 1
The control circuit board 104 is connected to the protrusion 134 of 07.
Fit the notches 137 of. Then, the drawer lead wire 132 is inserted into the notch 13 of the bobbin 107.
3. The control circuit board 10 is inserted through the through hole formed by the notch 136 of the control circuit board 104.
4, and therefore the lead wire 13
2 can be soldered to a predetermined location on the printed wiring pattern 138 on the control circuit board 104.

Further, a position detecting section 150 for detecting the rotational position of the rotor magnet disposed in the rotor block 200 is attached to the control circuit board 104. A position detecting element 151 constituting the position detecting section 150 is attached to a holder 152 and fixed to the control circuit board 104. This control circuit board 104 has positioning pins 15 of the holder 152.
3, and a notch 137 into which the above-mentioned protrusion 134 of the bobbin 107, which is a fitting portion having a fixed positional relationship with the positioning hole 154, is fitted.

Here, the holder 152 fixedly arranges the three Hall elements 151 with an angular difference of 30 degrees, and also serves to fix the Hall elements 151 at a fixed position with respect to the control circuit board 104. It is something. For example, it has a shape as shown in FIG. 9 or 10. That is, the holder 152 has three recesses 155 for guiding the Hall element, which are formed sequentially with an angular difference of 30 degrees in the rotational direction of the rotor magnet (arrow x direction in FIG. 9). The positioning pins 153 are implanted at fixed positions relative to these recesses 155. By the way, when the Hall element 151 is disposed opposite to the end surface of the rotor magnet, it is also necessary to determine its position in the radial direction, that is, in the direction of the arrow Y in the figure. As a result, in the holder 152, the Hall element 151 can be inserted into each recess 155.
When fitting and fixing, there is a possibility of displacement in the radial direction (direction of arrow Y in FIG. 10), which is not preferable. Therefore, it is preferable to have a stopper piece 156 for preventing displacement in the radial direction.

The recess 155 of the holder 152 having such a shape
After fitting and fixing the Hall element 151, the positioning pin 152 is inserted into the positioning hole 155 of the control circuit board 104 to fix the holder 152 and the control circuit board 104.
51 is fixed to the control circuit board 104 at a constant angle and radial position.

In the control circuit 104, the relative position of the positioning hole 154 and the notch 137 is fixed, and the notch 137 is connected to the protrusion 13 of the bobbin 107.
4 and fix these control circuit board 104 and bobbin 107, the Hall element 151 is fixed at a fixed position with respect to bobbin 107. As mentioned above, the bobbin 107 supports the yoke 108 around which the drive coil 103 is wound, and since the positional relationship between the stator coil 103 and the bobbin 107 is constant, the Hall element 151 supports the drive coil 103. 103, and the radial position is also fixed at a position where the magnetic poles of the rotor magnet can be normally detected.

As is clear from the above explanation, the Hall element 1
51 is fixed at a fixed position with respect to the drive coil 103 via the holder 152, the control circuit board 104, and the bobbin 107. Therefore, in advance,
Recess 155 of holder 152 and positioning pin 153
and the positional accuracy of the protrusion 13 of the bobbin 107.
4 and the drive coil 103, the Hall element 151 can be assembled with simple assembly work.
The positioning of the drive coil 103 and the drive coil 103 is automatically performed with high precision.

Furthermore, bearings 114 and 115 that support the rotating shaft 203 are press-fitted into the upper and lower ends of the cylindrical hole 113 of the bearing housing 102, respectively. Rotating shaft 20 supported by the bearings 114 and 115
In order to shorten the free end of the bearing housing 102 and avoid eccentricity caused by a load such as a pulley, the bearing housing 102 is provided at a position close to the caulked portion of the bearing housing 102. In this case, the caulking operation of the bearing housing 102 may cause distortion in the inner diameter of the bearing 114 or 115, making it impossible to smoothly rotate and support the rotating shaft 203. Therefore, a stepped portion 161 having an inner diameter somewhat larger than the outer diameter of the bearings 114, 115 is formed at the end of the bearing housing 102, which is the caulking portion, and the step d is cut into a cylinder as shown in FIG. 11A, for example. It is formed between the hole 113 and the cylindrical body 110. Then, by using the jig 162 to push open one end of the bearing housing 102 from the inside and perform a crimping operation, the stepped portion 16 is opened as shown in FIG. 11B.
1 is not smaller than the inner diameter of the bearing housing 102, therefore the bearings 114, 115
No excessive force is applied to the circumferential surface. In other words, the internal stress caused by plastic deformation is absorbed and no stress is applied to the bearing. In this way, smooth support of the rotating shaft by the bearings 114, 115 is ensured.

On the other hand, as shown in FIGS. 12 and 13, the rotor side block 200 consists of a magnetic case 201 made of iron alloy, a driving magnet 202 that is installed separately in the magnetic case 201, and a magnetic case. Watshiya 220 in the center of 201
It consists of a rotating shaft 203 fitted and attached to the rotating shaft 203, and a detection magnet 204 attached to the outside of the magnetic case 201 of the rotating shaft 203. Here, a holder 205 that holds the rotating shaft 203 is attached to the bottom of the magnet case 201, and a magnet holder 206 that supports the four divided magnets 202 at equal intervals is attached to the bottom of the magnet case 201. , press-fitted. In order to securely hold the magnetic case 201,
The magnetic holder 206 is attached to the magnetic case 201 with adhesive. This magnet holder 206 has an annular plate shape, and has four protrusions 207 erected at equal intervals on the end surface thereof. Also, at the same time as the press-fitting, the protrusion 20
A drive magnet 202 is placed on the annular plate partitioned by 7, and an adhesive is interposed between the drive magnet 202 and the inner peripheral surface of the magnet case 201. These magnet holder 206 and drive magnet 202 are attached to the magnet case 2.
01, a balance ring 209 having notched grooves 208 at both ends is fitted into the outer peripheral surface of the magnetic case 201. This cutout groove 208 is provided for attaching a balance weight 210 to balance the rotation of the rotor side block. Next, the holder 20 attached to the magnetic case 201
5, insert the rotating shaft 203 into it as shown in FIG.
By compressing the end of the holder 205, this rotating shaft 2
03 is fixed to a magnet case 201, and a detection magnet 204 is attached on the rotary shaft 203 on the bottom outer surface side of the magnet case 201 to obtain a rotor side block 200.

The magnet case 201 and drive magnet 202 of this rotor block 200 are constructed and assembled as follows.

An annular cutout 214 is provided inside the open end of the magnetic case 201, and the magnetic case 2
When the magnet 202 is installed in the case 01, this magnet 202 and the magnetic case 20
A gap is formed between 1 and 1. Then, as shown in FIG. 14, an epoxy adhesive 211 that does not harden at room temperature is injected into this gap using a dropper 212. In this way, the adhesive 211 is interposed between the magnet case 201 and the magnet 202 through this gap, and the adhesive solidifies in this gap to ensure that the two are bonded together as shown in FIG. Fixed. Further, as shown in FIG. 16, the end face of the magnet case 201 is subjected to a step drawing to form a drawing groove 218, thereby reducing the gap formed between the magnet case 201 and the magnet 202. Alternatively, the adhesive 211 may be injected using a method similar to that described above.

As shown in FIG. 17, the throttle groove 220 may be shaped so that the end surface of the motor case 201 is curved outward.

Furthermore, instead of forming an aperture groove in the magnet case 201 itself, as shown in FIG. Adhesive 2 is inserted into the notch 223 as described above.
11 may be injected. Alternatively, the magnet 202 may be chamfered to form an annular notch. Even with this method, the adhesive 211 is attached to the magnet 202 and the magnetic case 201.
Since the adhesive can be interposed or penetrated between the two surfaces, the adhesive will not accumulate on the surfaces of the two, and the appearance of the adhesive will not be impaired. In addition, processes such as leaving the adhesive to dry semi-dry are omitted, which reduces assembly time and prevents dust from adhering to the product, and also eliminates or reduces the storage space required during the semi-drying process. Therefore, the cost of the entire motor can be reduced.

Next, the detection coil block 300 will be explained.
As shown in FIG. 19, the rotation detecting section 301 constituting the detecting coil block 300 includes a plate-shaped core 302, a housing-shaped core 303, and a coil portion 304 interposed between them. The plate-shaped core 302 and the housing-shaped core 303 are formed of ferromagnetic metal plates, and the plate-shaped core 302 has an annular plate 305 whose central part is cut into a strip shape to form a pole piece 306. Moreover, these are bent in the direction toward the housing-shaped core 303. Furthermore, cutouts 307 are provided at two locations around the annular plate 305 to lead out lead ends from the coil portion 304 . On the other hand, the housing-shaped core 303 is composed of a pot-shaped housing 309 having an annular flange piece 308. The center of the housing 309 is cut out in the same manner as described above to form pole pieces 310, and these are bent vertically in the direction toward the plate-shaped core 302, that is, toward the inside of the housing 309. There is.

The coil portion 304 is made up of a hub 311 made of a non-magnetic material such as porcelain or synthetic resin, a bobbin 313 having flanges 312 connected to both ends of the hub 311, and a coil 314 wound around the hub 311. A guide protrusion 316 for guiding the lead wire end 315 of the coil 314 is provided on one of the flange 312, and a guide protrusion 316 is provided on one of the flange 312 to guide the lead wire end 315 of the coil 314.
It is provided at a position facing the notch 307 of. The lead wire end 315 is connected to the flange 312 near the flange 312 where the guide protrusion 316 is provided.
A slot 317 is provided for leading out from the inside of 2 to the outside. A positioning hole 313 is cut out between the pole pieces 306 of the flange 312, and when the coil portion 304 is housed in the housing-shaped core 303 and the plate-shaped core 302 is covered therewith, This positioning hole 318
A protrusion 319 protruding from the flange 312 is inserted to restrict the position of the coil portion 304 relative to the core 302.

Moreover, when the plate-shaped core 302, the housing-shaped core 303, and the coil portion 304 are combined,
The pole pieces 306 of the plate-shaped core 302 and the pole pieces 310 of the housing-shaped core 303 are arranged alternately and at equal intervals, and the positions of these and the coil portion 304 are also regulated, and the lead wire end 31
5 is led out to the outside through the slot 317 and along the inner surface of the guide protrusion 316 so as to escape the plate-shaped core 202, as shown in FIG.

The rotation detecting section 301 configured and assembled in this manner is a holder 3 having a shape as shown in FIG. 21 and molded from an insulating material such as synthetic resin.
29. This holder 329 is erected around a disk 331 having a recess 330 in the center, and the rotation detecting section 329 assembled as described above.
a protective wall 332 that supports or protects the outer periphery of the rotation detecting portion 301; a locking piece 333 that is erected between the protective walls 332 and fixes the position of the rotation detection portion 301;
It consists of a locking piece 334 that stands up opposite to this locking piece 333 and engages with the motor case. One of the protective walls 332 has two electrode pieces 335 protruding so that both ends of the electrode pieces 335 face the upper and lower parts of the protective wall 332, and the coil portion 304 of the rotation detecting portion 301 is attached to the upper portion of these electrode pieces 335. The lead wire ends 315 can be connected by soldering or the like. In addition, the locking piece 333
are provided at equal intervals, and the inner surface thereof is formed with a circular arc surface 336 that follows a circular arc locus with the same diameter, and the radius of the circular arc is equal to the outer diameter of the plate-shaped core 302 in the rotation detection portion 301 and It is selected to be approximately equal to the outer diameter of the flange piece 308 of the housing-shaped core 303. Furthermore, a claw 337 is provided on the upper part of the locking piece 333 and protrudes inwardly.
The height from the receiving surface 338 to the upper surface of the disc 331 is approximately the same as the height from the upper surface of the rotation detecting portion 301 and the plate-shaped core 302, which are the combined body, to the lower surface of the housing-shaped core 303. suitable.
Further, following this receiving surface 338, the upper surface is an inclined surface 339.
It is becoming. On the other hand, the other locking piece 334 is located on the outer periphery of the locking piece 333, and has a claw 340 projecting outward in the radial direction on its upper part, and has a flat receiving surface 341 on its upper surface. The lower surface is a continuous slope 342. The outer peripheral surface of the locking piece 334 has a diameter equal to the inner peripheral surface of the motor case 400, and therefore the tip of the pawl 340 is larger than the inner peripheral diameter of the motor case 400. . Note that the locking pieces 333 and 334 are provided with elasticity.

Therefore, the integrated rotation detection portion 301
To attach it to the holder 329, place the rotation detection part 301 on the claw 337,
Push this toward the top surface of the disc 331. As a result, the lower peripheral edge of the pot-shaped housing 309 of the housing-shaped core 303 in the rotation detecting portion 301 is pushed down along the inclined surface 339 of the claw 337, as shown in FIG. 22A. When this locking piece 333 is pushed open and pushed in further, the lower surface of the housing 309 is attached to the disk 33.
It hits the top surface of 1. As shown in FIG. 22B, the restoring force of the locking piece 333 causes the restoring force of the locking piece 333 to cause the upper periphery of the other plate-shaped core 302 to
It is devoured by. In this way, the rotation detection portion 301 is positioned and fixed to the holder 329 as shown in FIG. 23. In this way, the vertical and horizontal positions of the rotation detecting portion 301 are regulated according to the dimensions determined as described above.

Next, motor case 400 will be explained. This motor case 400 houses a stator side block 100, a rotor side block 200, and a detection coil block 300.
A bracket 101 of a stator side block 100 is fitted onto the upper end surface of the stator side block 100 to form an integrally assembled motor.

As shown in FIG. 24, the stator side block 10
Motor case 4 into which bracket 101 of No. 0 fits
The three end faces 414 of the peripheral wall 413 of 00 have vertical faces 415, 416 facing each other, planes 417, 418 following these vertical faces 415, 416, and vertical faces 419, 420 following these planes 417, 418.
the vertical surfaces 419, 412 whose upper end surfaces are at the same height as the end surface 414;
420, a protruding piece 421, the vertical surface 419,
420 and the vertical surfaces 422, 423 of the protruding piece 421
There are gaps 424 and 425 formed between the two. The lengths of the opposing portions of each of the surfaces are the same.

At three locations on the circumferential surface 171 of the bracket 101,
Two projecting pieces 172 and 173 facing each other are provided so as to sandwich the bent piece 174. This bent piece 174 was integrated with the protruding pieces 172 and 173, but two cuts 175 and 176 were made in the center part, and these cuts 17
The integral body is divided along lines 5 and 176 and bent so as to be inclined downward. The distance between the left side surface of one of the projecting pieces 172 and the right side surface of the projecting piece 173 is the distance between the vertical surface 4 of the motor case 400.
15 to the vertical plane 416,
Further, the distance between the circumferential surface of each of these projecting pieces 172 and 173 from the center of the bracket 101 is approximately equal to the outer diameter of the circumferential wall 413 of the motor case 400. Further, the outer diameter of the bracket 101 is approximately equal to the inner diameter of the peripheral wall 413 of the motor case 400. Furthermore, each of the protrusions 17
The thickness of 2,173 is the end surface 414 of the peripheral wall 413.
The length from the planes 417 and 418 is selected to be approximately equal. On the other hand, in the bent state, the end surface of the bent piece 174 is attached to the bracket 101.
When the bracket 101 is attached to the motor case 400, a part of the end surface of the bent piece 174 is It faces a position in contact with the inner surface of the peripheral wall 413.
Further, the distance between the protrusions 172 and 173 is set to be sufficiently larger than the width of the protrusion 421 on the motor case 400 side.

Next, the motor case 400 having such a configuration will be explained.
In contrast, the case where the bracket 101 is attached will be explained.

That is, as shown in FIGS. 25 and 26, the lower surfaces of the protrusions 172 and 173 provided at three locations on the periphery of the bracket 101 of the stator block 100 fitted with the rotor block 200 of the motor are attached to the motor case. It fits between the vertical surfaces 415, 422 and between the vertical surfaces 416, 420 so as to correspond to the planes 417, 418 of 400.

At this time, the bent piece 174 of the bracket 101
The end edge of the protruding piece 421 descends while contacting the inner surface of the protruding piece 421, and is held in contact with the vicinity of the inner base of the protruding piece 421 of the motor case 400 when the fitting is completed. Subsequently, the projecting piece 421 is bent toward the center and pressed against the upper surface of the bent piece 174.

The bracket 101 is fixed to the motor case 400, and the position of the bracket 101 in the center direction with respect to the motor case 400 is restricted by the inner surface of the peripheral wall 413 and the bracket 101.
The position in the rotational direction is controlled by contact between the vertical surfaces 415 and 416 of the circumferential wall 413 and the left side surface of the protruding piece 172 and the right side surface of the protruding piece 173 of the bracket 101, respectively. Similarly, the position in the thrust direction is restricted by the lower surface of the projections 172, 173 and the motor case 4.
This is done by contacting the flat surfaces 417 and 418 of the 00 peripheral wall 413. Therefore, the bracket 101 of the protruding piece 421 of the motor case 400
Regardless of the bending and crimping operations performed on the bending piece 174, the accuracy of the above dimensions is always maintained constant, and therefore the positional relationship of the rotor block 200 and the stator block 100 with respect to the motor case 400 is maintained in a favorable state. It will be maintained.
Since the bending portion of the protruding piece 421 relative to the bending piece 174 is performed in the vicinity of supporting the bracket 101, the bracket 101 itself will not be distorted or distorted by the bending operation.

Moreover, the motor case 400 in this embodiment
The control circuit board 104 fitted into the bobbin 107 fitted into the bearing housing 102 is prevented from rotating with respect to the bearing housing 102.

That is, as shown in FIGS. 28 and 29, the control circuit board 104 fitted to the bobbin 107
A tongue piece 181 is protruded from the circumferential surface of the control circuit board 104 , and a connector 182 for supplying power voltage to supply power to the control circuit configured on the control circuit board 104 is fixed onto the tongue piece 181 . . Moreover, the bracket 1 to which the bearing housing 102 is caulked
A tongue piece 183 having a length approximately equal to the plate thickness of the motor case 400 is also formed protrudingly on the circumferential surface of the motor case 400 .

On the other hand, the opening end of the motor case 400 is provided with notched holes 184 cut out at intervals approximately equal to the width of the tongue pieces 183 provided on the bracket 101, and slotted holes 185 wider than the above-mentioned intervals are provided in the notched holes 184. A fitting groove 186 for the tongue piece 181 is provided continuously below the slot 185.

Here, bobbin 1 relative to bearing housing 102
07 is prevented from rotating by fitting the integrated fixed portion of the control circuit board 104 and the bracket 101, to which the bobbin 107 is attached, into the motor case 400.

That is, during such fitting, the tongue piece 181 on the control circuit board 104 is accommodated in the fitting groove 186 of the motor case 400, and at this time the connector 182 is placed in the middle of the notch 184. At the same time, the projecting pieces 172 and 173 of the bracket 101 are accommodated on the notches 417 and 418 of the motor case 400. At this time, the tip of the bent piece 174 comes into contact with the inner surface of the protruding piece 421 of the motor case 400. In such a state, the protruding piece 421 is folded into the bent piece 17.
4, the control circuit board 104 and bracket 101 are both fixed to the motor case 400. That is, with only such a fitting structure, the above three parts can be easily held together, and therefore, in the event that a failure occurs in the internal structure or circuit, all that is required is to raise the above-mentioned protrusion 421.
It is easy to repair the malfunctioning parts and replace parts, and quality control is facilitated. Note that the projecting pieces 172 and 173 of the bracket 101 are connected to the notch 41.
7,418 to prevent the bracket 101 from rotating, and the tongue piece 181 of the control circuit board 104
It is also located within the fitting groove 186 and prevented from rotating.

Further, when the control circuit board 104 is attached to the motor case 400, the tongue piece 181 of the control circuit board 104 protrudes to the outside of the motor case 400. Therefore, the connector 182 on this tongue piece 181 also faces the outside, and a connector connected to an external power supply circuit is attached to and detached from the connector 182. A large external force is likely to be applied to the area near the tongue piece 181 where the connector 182 is attached when the connector connected to the external power supply circuit is attached or detached. is the above bracket 1
01 is only held by a coil spring 131, which has drawbacks such as being deflected in the vertical direction and being damaged, and concentricity with the bearings 114 and 115 not being maintained. Therefore, after attaching the stator block 100 including the control circuit board 104 and the bracket 101 to the motor case 400 as described above, in the slot 185,
By fitting the stopper 445, the position of the control circuit board 104, especially the position in the thrust direction, is maintained. This stopper 445 is made of a hard synthetic resin with some elasticity, and has a generally U-shape as a whole, with the slot 18 in the side surface.
Notches 446 to be fitted into both side edges of the connector 182 are formed smoothly, and the distance between the U-shaped protrusions 447 is approximately equal to the length between both sides of the connector 182. Thus, when the stopper 445 is press-fitted into the slot 185 and the notches 446 are fitted to both side edges of the slot 185, the control circuit board 104 is inserted between the stopper 445 and the slot 185. While being held, the U-shaped protrusion 44
7 grips both sides of the connector 182, so that the control circuit board 104 is securely fixed to the motor case 400.

As described above, the detection coil block 300 is fitted and assembled into the lower part of the motor case 400 into which the bracket 101 of the stator block 100 is fitted. The state in which the motor case 400 of the detection coil block 300 is assembled will be described below.

A fitting hole 444 is provided in the peripheral wall 413 of the motor case 400 in a protruding manner, through which the claw 340 of the holder 329 of the detection coil block 300 is guided.
A notch hole 447 for guiding the electrode piece 325 attached to the electrode piece 9 is bored. To accommodate the holder 329 of the detection coil block 300 in the motor case 400, the holder 329 is fitted into the motor case 400 as shown in FIG. 27A so that the bottom surface of the holder 329 faces the bottom plate 445 of the motor case 400. Push in the lever holder 329. At this time, the inclined surface 342 of the claw 340 of the holder 329
is pushed in along the opening periphery of the motor case 400, and the locking piece 334 is inserted into the motor case 40.
Deflect and enter into 0. Furthermore, this holder 32
9 is pushed into the inside, the periphery of the lower protrusion 343 formed relative to the recess 330 formed at the center of the disk 31 is bent and lowered,
The claw 340 hits the bottom plate 445 of the motor case 400 and escapes into the fitting hole 444 of the motor case 400.

At this time, as shown in FIG. 27B, the holder 3
The receiving surface 441 of the claw 340 of No. 29 is in close contact with the upper locking surface of the fitting hole 444 of the motor case 400, thereby preventing the holder 329 from moving in the direction toward the opening of the motor case 400. At the same time, the outer circumferential surface of the locking piece 334 comes into close contact with the inner circumferential surface of the motor case 400, and movement of the holder 329 in the outer radial direction is restricted. That is, attachment of the holder 329 to the motor case 400 is also performed by an extremely simple operation. At the same time, the electrode piece 335 of the holder 329 is attached to the motor case 400.
The rotation detection current passed through the notch 447 formed in the coil 314 is supplied to an external circuit, and the speed of the rotor block 200 can be controlled.

Thus, the stator side block 100, the rotor side block 200, the detection coil block 300, and the motor case 400 configured as described above.
are sequentially focused in the axial direction to form an integrated motor.

That is, the detection coil block 300 is inserted and fitted into the motor case 400, and the electrode piece 32 attached to the holder 329 of the detection block 300 is inserted and fitted into the motor case 400.
5, 325 protrudes from a notch 447 formed in the bottom plate 445 of the motor case 400. A locking piece 33 that engages the holder 329 constituting the detection coil block 300 with the motor case 400
4 faces the fitting hole 444 of the motor case 400, the locking piece 334 is fitted into the fitting hole 444 of the motor case 400, and the detection coil block 300 and the motor case are Try to fix 400. Next, the rotating shaft 203 of the rotor block 200 is inserted into the bearings 114, 115 of the stator block 100 to support one of them relative to the other.
The tongue piece 181 of the control circuit board 104 constituting the stator side block 100 is installed in a notch 186 formed further inward along the notch 184 of the motor case 400. Control circuit board 10
4 into the notch 1 of the motor case 400.
86, the tongue piece 1 of the bracket 101
83 into the notch 184 of the motor case 400. Next, the stopper 445 is inserted into a slot 185 that is continuous with the notch 186 in which the tongue piece 181 of the control circuit board 104 is installed.
The tongue piece 181 of the control circuit board 104 is fixed in the fitting groove 186 by pushing the tongue piece 181 into the fitting groove 186.

In this way, rotation of the control circuit board 104 is prevented and movement in the thrust direction is prevented. At this time, the connection pin 192 of the connector 182 for connecting an external power supply circuit faces toward the outside of the motor case 400.
Furthermore, the bracket 101 can be fixed to the motor case 400 by pushing down the protruding piece 421 of the motor case 400 onto the bent piece 174 of the bracket 101. The motor having the structure described above does not require any separate fixing parts to hold each component block, and can be easily formed integrally with a simple operation. Incidentally, FIG. 30 shows a sectional view of the completed motor assembled as described above.

As described above, the present invention includes a bearing housing in which a bearing supporting a rotating shaft is inserted into a cylindrical body, a driving coil wound around the bearing housing, and a hook-shaped protrusion formed at the lower end of the bearing housing. a hollow coil bobbin supported by the bearing housing by being engaged with a hook-shaped notch formed at the lower end of the bearing housing; a control circuit board disposed on the upper end side of the coil bobbin; A fitting cylinder part is inserted into the formed through hole and fitted into a fitting recess formed on the upper end side of the coil bobbin, and an annular flange protrudingly formed on the outer periphery of the upper end side of the fitting cylinder part and the coil bobbin. a circuit board support member which holds the control circuit board between its upper end surfaces, and a locking protrusion formed on the annular flange of the circuit board support member and the outer periphery of the upper end of the bearing housing; Since it is composed of a coil spring formed by pressing a coil bobbin against the hook-shaped notch at the lower end of the bearing housing, it is not only easy to assemble the stator of a motor with a built-in control circuit board, but also easy to disassemble. This makes it easy to perform repairs.

In particular, since a coil spring is provided that presses the coil bobbin toward the hook-shaped notch on the lower end side of the bearing housing, the positional accuracy of the relative mounting position of the coil bobbin and the bearing housing can be improved.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing each constituent part of an embodiment of a motor constructed by applying the present invention. FIG. 2 is a schematic sectional view showing the assembled state of the stator block of the motor in this embodiment. FIG. 3 is an exploded perspective view showing the assembled state of the bracket and bearing housing that constitute the stator block. FIG. 4 is a perspective view of the stator block in an assembled state. FIG. 5 is an exploded perspective view showing how the yoke is attached to the bobbin constituting the stator block. FIG. 6 is an exploded perspective view showing how the control circuit board is attached to the bobbin constituting the stator block.
FIG. 7 is an exploded perspective view of the bracket and bearing housing assembly being attached to the bobbin and control circuit board assembly. FIGS. 8A, 8B, and 8C are sectional views showing the order in which the bobbin is attached to the bearing housing. FIG. 9 is a partially exploded perspective view of the Hall element assembled to the holder. FIG. 10 is an exploded perspective view showing another example of the state in which the Hall element is attached to the holder. FIGS. 11A and 11B are sectional views of main parts in a state where the bearing is fitted into the bearing housing. FIG. 12 is an exploded perspective view showing each component of the rotor block in this embodiment. FIG. 13 is a perspective view showing the assembled state. FIG. 14 is a perspective view showing how the magnets are attached to the magnet case of the rotor block. FIG. 15 is a sectional view of the attached state. Figure 16,
FIGS. 17 and 18 are sectional views showing other examples of the structure for attaching the magnet to the magnet case. FIG. 19 is an exploded perspective view showing the assembly structure of the detection block in this embodiment. FIG. 20 is an enlarged perspective view showing a guide protrusion provided on the flange of the hub of the detection block. FIG. 21 is a perspective view of the holder of the detection block. FIGS. 22A and 22B are cross-sectional views showing the assembly process of the rotation detection section and the holder. FIG. 23 is a perspective view of the rotation detection portion and the holder after they are assembled. FIG. 24 is an external perspective view of the motor case of the motor in this embodiment.
FIG. 25 is an enlarged perspective view of the main parts showing the correspondence at the joint between the motor case and the bracket. FIG. 26 is an enlarged perspective view of the main parts showing the state in which the motor case and the bracket are connected. Second
FIG. 7A and FIG. 27B are cross-sectional views showing the assembly process of the rotation detection portion and the motor case in this embodiment. FIG. 28 is an exploded perspective view showing a state in which a stopper is attached to the bracket attached to the motor case. FIG. 29 is a perspective view of a motor completed by combining each component. FIG. 30 is a sectional view of the motor in a completed state. 102... Bearing housing, 103... Drive coil, 104... Control circuit board, 107... Coil bobbin, 110... Cylindrical body, 111... Locking protrusion, 114, 115... Bearing, 116... Hook shaped notch, 123... hook-shaped projection, 127... fitting recess, 128... fitting cylinder part, 129... circuit board support member, 130... annular flange part, 135...
A through hole provided in the control circuit board, 203... Rotating shaft.

Claims (1)

[Claims for Utility Model Registration] Bearing housing 1 in which bearings 114 and 115 that support a rotating shaft 203 are fitted into a cylindrical body 110.
02, the drive coil 103 is wound and fitted into the bearing housing 102, and the hook-shaped protrusion 123 formed at the lower end is engaged with the hook-shaped notch 116 formed at the lower end of the bearing housing 102. A hollow coil bobbin 107 supported by the housing 102, a control circuit board 104 disposed on the upper end side of the coil bobbin 107, and a through hole 13 formed in the control circuit board 104.
The fitting cylinder part 128 is inserted into the fitting recess 127 formed on the upper end side of the coil bobbin 107 through the coil bobbin 107, and the annular flange 130 and the annular flange 130 protruding from the outer periphery of the upper end side of the fitting cylinder part 128 are fitted. a circuit board support member 129 that holds the control circuit board 104 between the upper end surface of the coil bobbin 107; and an annular flange 1 of the circuit board support member 129.
30 and a locking protrusion 111 formed on the outer periphery of the upper end of the bearing housing 102, and presses the coil bobbin 107 toward the hook-shaped notch 116 on the lower end of the bearing housing 102. The stator of the motor, consisting of: