JP2015171195A - Motor, motor device and pointer type display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor capable of suppressing oscillation of a rotor toward a radial direction, a motor device having the same and a pointer type display device.SOLUTION: In a motor 1, coils 9 are arranged around each of two salient poles 61f, 61b (main poles) located in a first angular range θ1 of less than 180 degrees, out of a plurality of salient poles 61 of a stator core 60. Salient poles 61c-61e located in a second angular range θ2 of 180 degrees centered on an extended line Lb of a virtual bisector La that bisects the first angular range θ1 on a side opposite to where the two main poles (salient poles 61f, 61b) are located, out of the plurality of the salient poles 61, are first interpoles around which coils 9 are not arranged. Configuration of a gap space sandwiched by the main poles (salient poles 61f, 61b) and a magnet 50 is different from configuration of a gap space sandwiched by the first interpoles (salient poles 61c-61e) and the magnet 50.

Description

  The present invention relates to a motor in which a coil is wound around two salient poles among a plurality of salient poles of a stator core provided along a circumferential surface of a magnet, a motor device, and a pointer-type display device.

  In a display device such as an automotive meter device, a structure in which a pointer is attached by a motor may be employed. On the other hand, a configuration has been proposed in which a plurality of salient poles of a stator core are arranged along the circumferential surface of a magnet, and a coil is wound around two salient poles among the plurality of salient poles (see Patent Document 1). ).

Japanese Patent No. 2005-333786

  In the motor described in Patent Document 1, when the rotor rotates, a force acts on the rotor from each of two radial directions orthogonal to the rotation center axis of the rotor. Further, the force applied to the rotor from the radial direction reverses as the rotor rotates. For this reason, the rotor vibrates, which causes, for example, the generation of abnormal noise or a reduction in bearing life.

  In view of the above problems, an object of the present invention is to provide a motor capable of suppressing vibration of a rotor in the radial direction, a motor device including the motor, and a pointer-type display device.

  In order to solve the above-described problems, a motor according to the present invention has a rotor including a magnet in which S poles and N poles are alternately provided in the circumferential direction, and a tip portion with a gap between the outer peripheral surfaces of the magnets. A stator core in which a plurality of opposing salient poles are arranged in the circumferential direction; a coil arranged around each of two main poles located in a first angle range of less than 180 ° among the plurality of salient poles; 180 of the plurality of salient poles, centered on an extension line of a virtual bisector that bisects the first angle range on the side opposite to the side where the two main poles are located. The salient pole located in the second angle range of ° is the first complementary pole in which the coil is not arranged around, and the configuration of the gap space sandwiched between the tip of the main pole and the outer peripheral surface of the magnet A structure of a gap space sandwiched between the tip of the first auxiliary pole and the outer peripheral surface of the magnet. Due to the difference in configuration, between the rotor and the stator core, the rotor is biased to one of the side where the main pole is located and the side opposite to the side where the main pole is located. A radial suction force is generated.

  In the present invention, the configuration of the gap space sandwiched between the tip of the main pole disposed in the first angle range and the outer peripheral surface of the magnet, and the second angle range opposite to the side where the two main poles are located. Since the structure of the gap space sandwiched between the first auxiliary pole positioned at the outer periphery of the magnet and the outer peripheral surface of the magnet is different, the rotor is positioned between the rotor and the stator core, and the main pole A radial suction force is generated that biases one of the sides opposite to the side where the is located. Accordingly, the rotor rotates in a state where it receives a side pressure directed toward one of the first angle range where the main pole is located or the second angle range where the first supplementary pole is located, so the rotor is less likely to vibrate. . Therefore, it is possible to suppress the occurrence of abnormal noise caused by vibration.

  In the present invention, the width of the tip portion of the main pole and the width of the tip portion of the first complementary pole are different, so that the rotor has the main pole between the rotor and the stator core. It is possible to employ a configuration in which a radial suction force is generated that biases one of the positioned side and the side opposite to the side where the main pole is positioned.

  In the present invention, it is preferable that a second complementary pole without a coil is positioned between the two main poles, and the width of the second complementary pole is equal to the width of the main pole.

  In the present invention, the width of the tip of the main pole is wider than the width of the tip of the first complementary pole, so that the rotor is placed on the side where the main pole is located between the rotor and the stator core. It is preferable that a radial suction force to be applied is generated. When the coil is energized, the main pole has a larger force to attract the rotor than the first auxiliary pole. Therefore, if the width of the tip of the main pole is made wider than the width of the first auxiliary pole in accordance with this configuration, the rotor Between the rotor and the stator core, a radial suction force can be reliably generated toward the rotor where the main pole is located.

  In the present invention, the thickness of the tip of the main pole is different from the thickness of the tip of the first complementary pole, so that the rotor has the main pole between the rotor and the stator core. It is possible to employ a configuration in which a radial suction force is generated that biases one of the positioned side and the side opposite to the side where the main pole is positioned.

  In the present invention, the stator core is a laminated core in which a plurality of magnetic plates are laminated. Among the plurality of magnetic plates, at least one magnetic plate has the main pole and the magnetic plate more than other magnetic plates. Among the first complementary poles, the portion constituting the salient pole having a thin tip portion is short, so that the thickness of the tip portion of the main pole is different from the thickness of the tip portion of the first complement pole. A configuration can be employed.

  In the present invention, it is preferable that a second complementary pole without a coil is positioned between the two main poles, and the thickness of the second complementary pole is equal to the thickness of the main pole. .

  In the present invention, since the thickness of the tip of the main pole is thicker than the thickness of the tip of the first complementary pole, the rotor is disposed on the side where the main pole is located between the rotor and the stator core. It is preferable that a radial suction force that is biased to be generated. When the coil is energized, the main pole has a larger force for attracting the rotor than the first auxiliary pole, so that the thickness of the tip of the main pole is thicker than the thickness of the tip of the first auxiliary pole in accordance with this configuration. By doing so, it is possible to reliably generate a radial suction force between the rotor and the stator core toward the rotor where the main pole is located.

  The motor according to the present invention can be used in a motor device, and the motor device includes a train wheel that transmits the rotation of the rotor, and an output member that transmits the rotation of the rotor via the train wheel. Have.

  The motor device according to the present invention can be used in a pointer-type display device, and in such a pointer-type display device, the pointer is driven by the output member.

In the present invention, the configuration of the gap space sandwiched between the tip of the main pole disposed in the first angle range and the outer peripheral surface of the magnet, and the second angle range opposite to the side where the two main poles are located. Since the structure of the gap space sandwiched between the first auxiliary pole positioned at the outer periphery of the magnet and the outer peripheral surface of the magnet is different, the rotor is positioned between the rotor and the stator core, and the main pole A radial suction force is generated that biases one of the sides opposite to the side where the is located. Accordingly, the rotor rotates in a state where it receives a side pressure directed toward one of the first angle range where the main pole is located or the second angle range where the first supplementary pole is located, so the rotor is less likely to vibrate. . Therefore, it is possible to suppress the occurrence of abnormal noise caused by vibration.

It is explanatory drawing of the motor apparatus which concerns on Embodiment 1 of this invention. It is explanatory drawing of the motor used for the motor apparatus which concerns on Embodiment 1 of this invention. It is a top view of the motor used for the motor apparatus concerning Embodiment 1 of the present invention. It is explanatory drawing which shows typically the clearance gap between the salient pole and magnet in the motor used for the motor apparatus which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows typically the clearance gap between the salient pole and magnet in the motor used for the motor apparatus which concerns on the modification of Embodiment 1 of this invention. It is explanatory drawing which shows typically the clearance gap between the salient pole and magnet in the motor used for the motor apparatus which concerns on Embodiment 2 of this invention. It is explanatory drawing of the stator core of the motor used for the motor apparatus which concerns on Embodiment 2 of this invention. It is explanatory drawing which shows typically the clearance gap between the salient pole and magnet in the motor used for the motor apparatus which concerns on the modification of Embodiment 2 of this invention. It is explanatory drawing of the stator core of the motor used for the motor apparatus which concerns on the modification of Embodiment 2 of this invention. It is explanatory drawing which shows typically the air gap of the salient pole and magnet in the motor used for the motor apparatus which concerns on Embodiment 3 of this invention. It is explanatory drawing which shows typically the air gap of the salient pole and magnet in the motor used for the motor apparatus which concerns on Embodiment 4 of this invention.

  Hereinafter, a motor, a motor device, and a pointer type display device to which the present invention is applied will be described with reference to the drawings.

[Embodiment 1]
(Overall configuration of motor device)
FIG. 1 is an explanatory diagram of a motor device 100 according to Embodiment 1 of the present invention, and FIGS. 1A and 1B are perspective views of the motor device 100 as seen from the side from which an output shaft 10 protrudes. FIG. In the following description, in the direction in which the axis L of the output shaft 10 extends, the side on which the output shaft 10 projects is referred to as one side L1, and the side opposite to the side on which the output shaft 10 projects is defined. The other side is L2. The axis of the rotor 5 in the motor 1 is the rotation center axis L0. For the sake of convenience, one side of the rotation center axis L0 is also referred to as one side L1, and the other side of the rotation center axis L0 is also referred to as the other side L2.

  The motor device 100 shown in FIG. 1 has a structure in which an output shaft 10 (output member) protrudes from the case 2 on one side L1 in the axis L direction. The motor device 100 of this embodiment is used in a pointer type display device 200, and a pointer 11 is connected to the output shaft 10.

The case 2 has a first case 21 that is substantially circular when viewed from the direction of the axis L, and a second case 22 that is substantially circular when viewed from the direction of the axis L. The first case 21 is disposed on the other side L2 in the axis L direction, and the second case 22 is disposed on the one side L1 in the axis L direction. The side plate portion 211 of the first case 21 has convex portions 219 formed at a plurality of locations in the circumferential direction, and the side plate portion 221 of the second case 22 engages with the convex portions 219 at a plurality of locations in the circumferential direction. A hook 229 is formed. Therefore, the case 2 can be configured by engaging the hook 229 and the convex portion 219 to join the first case 21 and the second case 22 together. In the case 2 configured as described above, the bottom plate portion 222 of the second case 22 is formed with a cylindrical portion 223 that supports the output shaft 10.

(Configuration of motor 1)
The motor device 100 has a motor 1 inside a case 2. The motor 1 has a rotor 5 rotatably supported by the case 2 and a stator 6 disposed around the rotor 5. The rotor 5 has a rotating shaft 51 that is rotatably supported by the case 2.

  The rotor 5 includes a pinion 58 fixed to one end L1 of the rotation shaft 51 in the direction of the rotation center axis L0, and a cylindrical magnet 50 integrated with the pinion 58. On the outer peripheral surface, S poles and N poles are alternately formed at equiangular intervals. In this embodiment, the magnet 50 and the pinion 58 are integrated by insert molding, and the magnet 50 and the pinion 58 are coupled by a resin disc portion 59. Further, the disc part 59 is fixed to the rotating shaft 51.

  Further, the motor device 100 has a train wheel 4 that decelerates the rotation of the rotor 5 and transmits it to the output shaft 10. The train wheel 4 is also supported by the case 2 like the rotor 5 and the stator 6. Yes. The train wheel 4 includes a first gear 41 that includes a large-diameter gear 411 that meshes with the pinion 58 of the rotor 5 and a small-diameter gear (not shown) that meshes with the second gear 42, and a small-diameter gear of the first gear 41. And a large-diameter second gear 42 that meshes therewith. The output shaft 10 is formed integrally with the second gear 42, and the output shaft 10 is rotatably supported by the concave portion 215 of the first case 21 and the cylindrical portion 223 of the second case 22. The first gear 41 is rotatably supported by the support shaft 48, and both ends of the support shaft 48 are held by the shaft hole 216 and the second case 22 of the first case 21.

(Detailed configuration of stator 6)
2 is an explanatory diagram of the motor 1 used in the motor device 100 according to Embodiment 1 of the present invention. FIGS. 2A, 2B, and 2C are perspective views of the motor 1, and FIG. FIG. 2 is an exploded perspective view of the motor 1 and an exploded perspective view showing a state where the motor 1 is further finely disassembled. FIG. 3 is a plan view of the motor 1 used in the motor apparatus 100 according to Embodiment 1 of the present invention.

  As shown in FIG. 2 and FIG. 3, in the motor 1, the stator 6 has a stator core 60 having a plurality of salient poles 61 (salient poles 61 a to 61 f) opposed to the outer peripheral surface of the magnet 50 with a gap. The plurality of salient poles 61 are connected by a connecting portion 65. The stator 6 includes a coil bobbin 7 (coil bobbin 7a) mounted on the salient pole 61f (main pole) among the plurality of salient poles 61, and a coil 9 (first) that circulates around the salient pole 61f via the coil bobbin 7. One coil 9a), a coil bobbin 7 (coil bobbin 7b) mounted on the salient pole 61b (main pole) among the plurality of salient poles 61, and a coil 9 (first) that circulates around the salient pole 61b via the coil bobbin 7. 2 coils 9b). In this embodiment, the number of salient poles 61 is six, and in the magnet 50, four pairs of S poles and N poles are formed. Further, the main poles (the salient poles 61f and 61b) are arranged on the first gear 41 side shown in FIG. 1 with respect to the rotation center axis L0.

  In the stator 6, a portion where the rotor 5 is disposed is an opening 64, and a plurality of salient poles 61 project from the inner peripheral edge of the opening 64 toward the outer peripheral surface of the magnet 50, and the radial direction of the salient pole 61 Inner tip portions 610a to 610f are opposed to the outer peripheral surface of the magnet 50 via a gap.

Here, in the stator core 60, the salient poles 61b and 61f to which the coil bobbin 7 is attached are longer than the other salient poles 61a and 61c to 61e. For this reason, the stator core 60 has salient poles 61b,
A portion where 61 f is formed projects in a substantially rectangular shape radially outward, and the salient poles 61 b and 61 f protrude radially inward from the outer peripheral portions of the rectangular portions 69 b and 69 f of the stator core 60.

  The stator core 60 has a plate shape and is configured by stacking a plurality of magnetic plates punched into the above shape. The stator core 60 is formed with a hole 68 in which the support shaft 48 is fitted in the vicinity of the base of the salient pole 61a. The stator core 60 projects radially outward from the salient pole 61d in the radial direction, and the first case 21 shown in FIG. A convex portion 67 sandwiched between the second case 22 is formed.

(Configuration of coil bobbin 7)
The coil bobbin 7a and the coil bobbin 7b are configured symmetrically with respect to a line connecting the salient poles 61a and 61d, and have the same structure. For this reason, the coil bobbin 7a and the coil bobbin 7b will be described with the same reference numerals assigned to common portions.

  The coil bobbin 7a includes an insulating bobbin main body 70 having a cylindrical body 71 around which a coil wire 90 forming the coil 9 (first coil 9a) is wound, and two bobbins 70 held by the bobbin main body 70. And terminal pins 8 (terminal pins 8a and 8b). The bobbin main body 70 is made of resin, and the terminal pins 8 are made of metal. The bobbin main body 70 includes a first flange 72 having an outer dimension larger than that of the body portion 71 at an end portion on the radially inner side of the body portion 71. A second collar 73 having a large outer dimension is provided. The first collar 72 and the second collar 73 are opposed to each other with the body 71 interposed therebetween, and the coil wire 90 is disposed around the body 71 between the first collar 72 and the second collar 73. It is wound.

  The second flange 73 holds terminal pins 8 (terminal pins 8a and 8b). One end 81 of the terminal pin 8 is soldered after the end of the coil wire 90 is entangled. The other end 82 of the terminal pin 8 protrudes from the first case 21 shown in FIG. 1 and is connected to a wiring material (not shown) such as a wiring board. The body portion 71 has a rectangular cylindrical shape, and the salient pole 61f of the stator core 60 is inserted inside the body portion 71. As a result, the first coil 9a is disposed around the salient pole 61f. The salient pole 61f abuts against a convex portion (not shown) formed on the inner surface of the body portion 71, and the coil bobbin 7 is prevented from being displaced with respect to the salient pole 61f.

  The coil bobbin 7b includes an insulating bobbin main body 70 having a cylindrical body 71 around which a coil wire 90 forming a coil 9 (second coil 9b) is wound, and two bobbins 70 held by the bobbin main body 70. And terminal pins 8 (terminal pins 8a and 8b). Since the configuration of the bobbin main body 70 is the same as that of the coil bobbin 7a, a description thereof will be omitted, but the salient pole 61b of the stator core 60 is inserted inside the body 71 of the bobbin main body 70. As a result, the second coil 9b is disposed around the salient pole 61b.

  In the rectangular portion 69b, the extending portions 651 extending along the salient pole 61b on both sides of the salient pole 61b extend obliquely with respect to the salient pole 61b, and the salient pole 61b and the extending portion 651 The interval widens radially inward. For this reason, it is easy to insert the coil bobbin 7b into the salient pole 61b from the inside in the radial direction. Also in the rectangular portion 69f, the extended portions 651 extending along the salient pole 61f on both sides of the salient pole 61f extend obliquely with respect to the salient pole 61f, and the salient pole 61f and the extended portion 651 are extended. The interval between and widens radially inward. For this reason, it is easy to insert the coil bobbin 7a into the salient pole 61f from the inside in the radial direction.

(Operation)
In the motor 1, the motor device 100, and the pointer-type display device 200 configured as described above, when power is supplied to the coil 9 (first coil 9a and second coil 9b) via the terminal pins 8 (terminal pins 8a and 8b), the rotor 5 rotates, and this rotation is transmitted to the output shaft 10 via the train wheel 4 shown in FIG. Accordingly, the pointer 11 connected to the output shaft 10 rotates. At this time, by inputting a predetermined number of drive pulses to the coil 9, the angular position of the pointer 11 is switched, and the pointer 11 can be rotated clockwise to the target position and then stopped. Further, if a driving pulse for reverse rotation is supplied, the pointer can be rotated counterclockwise to another target position.

(Angle position of salient pole 61)
In this embodiment, the salient poles 61 are arranged at unequal intervals, but the salient pole 61f (main pole) where the first coil 9a is arranged and the salient pole 61b (main pole) where the second coil 9b is arranged. ), When the center in the circumferential direction of one salient pole is between the S and N poles, that is, the boundary between the S and N poles, the center in the circumferential direction of the other salient pole is the S pole. Are arranged so as to face the center in the circumferential direction or the center in the circumferential direction of the N pole. More specifically, in this embodiment, the number of salient poles 61 is six, and in the magnet 50, four pairs of S poles and N poles are formed, so that the angular position in the circumferential direction is 112.5 °. The shifted two salient poles 61f and 61b are used as main poles, and the other salient poles 61a, 61c, 61d and 61e are complementary poles on which the coil 9 is not disposed. Note that the angular positions of the salient poles 61f and 61b are shifted by 112.5 ° means that the circumferential center of the salient pole 61f and the circumferential center of the salient pole 61b are shifted by 112.5 ° in the angular position. Means that

  Further, in this embodiment, each interval between the salient poles 61 adjacent in the circumferential direction is 56.25 °, 56.25 °, 67.5 ° clockwise from the salient pole 61a toward the FIG. 67.5 °, 56.25, and 56.25 °.

  Thus, in the motor apparatus 100 of this embodiment, in the motor 1, the magnet 50 has four pairs of S poles and N poles formed at equal angular intervals, and the stator core 60 has six salient poles 61. In such a configuration, if the salient poles 61 are arranged at equal angular intervals, an excitation torque sufficient for the rotation of the rotor 5 cannot be obtained. However, in the stator core 60, the coil 9 is wound out of the plurality of salient poles 61. In the salient poles 61f and 61b, when the circumferential center of one salient pole faces between the S pole and the N pole, the circumferential center of the other salient pole is the circumferential center of the S pole or N It arrange | positions so that the center of the circumferential direction of a pole may be opposed. For this reason, an excitation torque sufficient for the rotation of the rotor 5 can be obtained.

  Moreover, when the change of the detent torque with respect to the electrical angle was verified with respect to the motor 1 used in the motor device 100 of this embodiment, when the intervals between the salient poles 61 adjacent in the circumferential direction were set to the above-described conditions, the detent torque Small change. For this reason, in the motor apparatus 100 of this embodiment, there is little vibration of the rotor 5. Therefore, the volume generated when the rotor 5 is rotated can be reduced, and noise can be reduced.

(Configuration of gap space between salient pole 61 and magnet 50)
FIG. 4 is an explanatory diagram schematically showing a gap space between the salient pole 61 and the magnet 50 in the motor 1 used in the motor apparatus 100 according to Embodiment 1 of the present invention.

  In the present embodiment, as shown in FIG. 4, two salient poles 61f and 61b located in the first angle range θ1 of less than 180 ° among the plurality of salient poles 61 are respectively main coils with the coil 9 disposed around them. It is considered as a pole. On the other hand, of the plurality of salient poles 61, a virtual bisector La that bisects the first angle range θ1 on the side opposite to the side where the two salient poles 61f and 61b (main poles) are located. The salient poles 61c, 61d, 61e positioned in the second angle range θ2 of 180 ° centered on the extended line Lb of the first coil are the first auxiliary poles around which the coil 9 is not disposed. Further, the salient pole 61a located between the two main poles (the salient poles 61f and 61b) is a second complementary pole where the coil 9 is not disposed.

  In the present embodiment, the configuration of the gap space sandwiched between the tip portions 610f, 610 of the main pole (the salient poles 61f, 61b) and the outer peripheral surface of the magnet 50, and the first auxiliary pole (the salient poles 61c, 61d, 61e). The configuration of the gap space sandwiched between the tip portions 610c, 610d, and 610e and the outer peripheral surface of the magnet 50 is different. For this reason, between the rotor 5 and the stator core 60, the rotor 5 is located on the side opposite to the side where the main pole (saliency poles 61f, 61b) is located and on the side where the main pole (saliency poles 61f, 61b) is located. A radial suction force biasing one of them is generated.

  More specifically, first, in the six salient poles 61, the thicknesses of the tip portions 610a to 610f and the distance between the tip portions 610a to 610f and the outer peripheral surface of the magnet 50 are the same. In addition, the widths W1 of the tip portions 610f and 610b are the same in the two main poles (the salient poles 61f and 61b), and the tip portions 610c and 610d in the three first complementary poles (the salient poles 61c, 61d and 61e). , 610e have the same width W2. However, the width W1 and the width W2 are different. In this embodiment, the width W1 is wider than the width W2.

  For this reason, the magnetic attraction force between the magnet 50 and the main pole (the salient poles 61f and 61b) is different from the magnetic attraction force between the magnet 50 and the first auxiliary pole (the salient poles 61c, 61d and 61e). The magnetic attraction force between the magnet 50 and the main pole (saliency poles 61f, 61b) is larger than the magnetic attraction force between the magnet 50 and the first auxiliary pole (saliency poles 61c, 61d, 61e). It is.

  In this embodiment, a salient pole 61a (second auxiliary pole) in which the coil 9 is not disposed is provided between the two main poles (surge poles 61f and 61b). The width of the tip 610a of the salient pole 61a is W1, which is equal to the width W1 of the tips 610f and 610b of the main pole (surge poles 61f and 61b). For this reason, the magnetic attraction force between the magnet 50 and the second auxiliary pole (the salient pole 61a) is larger than the magnetic attraction force between the magnet 50 and the first auxiliary pole (the salient poles 61c, 61d, 61e).

  Accordingly, the rotor 5 rotates in a state of receiving a side pressure (radial biasing force: indicated by an arrow F) toward the first angle range θ1 where the main poles (the salient poles 61f and 61b) are located. Therefore, since the vibration of the rotor 5 is small, the volume generated when the rotor 5 is rotated can be reduced, and the noise can be reduced.

  In addition, when the coil 9 is energized, the main pole (the salient poles 61f and 61b) has a larger force for attracting the rotor 5 than the first auxiliary pole (the salient poles 61c, 61d and 61e). In addition, the width W1 of the leading end portions 610f and 610b of the main pole (the salient poles 61f and 61b) is made wider than the width W2 of the leading end portions 610c, 610d and 610e of the first complementary pole (the salient poles 61c, 61d and 61e). is there. Therefore, the rotor 5 rotates in a state in which the side pressure toward the first angle range θ1 where the main poles (the salient poles 61f and 61b) are located (radial biasing force: indicated by the arrow F) is reliably received. Therefore, since the vibration of the rotor 5 is small, the volume generated when the rotor 5 is rotated can be reduced, and the noise can be reduced. Further, since the vibration of the rotor 5 is small, it is possible to suppress a decrease in the life of the bearing portion (the portion supporting the rotary shaft 51 in the case 2) of the rotor 5 with respect to the rotary shaft 51.

[Modification of Embodiment 1]
FIG. 5 is an explanatory diagram schematically showing a gap space between the salient pole 61 and the magnet 50 in the motor 1 used in the motor apparatus 100 according to the modification of the first embodiment of the present invention. Since the basic configuration of this embodiment is the same as that of Embodiment 1, common portions are denoted by the same reference numerals and description thereof is omitted.

As shown in FIG. 5, also in the present embodiment, as in the first embodiment, the configuration of the gap space sandwiched between the tip portions 610f, 610 of the main poles (the salient poles 61f, 61b) and the outer peripheral surface of the magnet 50, First
The configuration of the gap space sandwiched between the tip portions 610c, 610d, and 610e of the auxiliary poles (the salient poles 61c, 61d, and 61e) and the outer peripheral surface of the magnet 50 is different. For this reason, between the rotor 5 and the stator core 60, the rotor 5 is located on the side opposite to the side where the main pole (saliency poles 61f, 61b) is located and on the side where the main pole (saliency pole 61f, 61b) is located. A radial suction force biasing one of them is generated. More specifically, first, in the six salient poles 61, the thicknesses of the tip portions 610a to 610f and the distance between the tip portions 610a to 610f and the outer peripheral surface of the magnet 50 are the same. In addition, the widths W1 of the tip portions 610f and 610b are the same in the two main poles (the salient poles 61f and 61b), and the tip portions 610c and 610d in the three first complementary poles (the salient poles 61c, 61d and 61e). , 610e have the same width W2. However, the width W1 and the width W2 are different.

  In this embodiment, the width W1 is narrower than the width W2. For this reason, the magnetic attraction force between the magnet 50 and the main pole (the salient poles 61f and 61b) is different from the magnetic attraction force between the magnet 50 and the first auxiliary pole (the salient poles 61c, 61d and 61e). The magnetic attraction force between the magnet 50 and the first auxiliary pole (the salient poles 61c, 61d, 61e) is larger than the magnetic attraction force between the magnet 50 and the main pole (the salient poles 61f, 61b). It is.

  In this embodiment, a salient pole 61a (second auxiliary pole) in which the coil 9 is not disposed is provided between the two main poles (surge poles 61f and 61b). The width of the tip 610a of the salient pole 61a is W1, which is equal to the width W1 of the tips 610f and 610b of the main pole (surge poles 61f and 61b). For this reason, the magnetic attraction force between the magnet 50 and the first complementary pole (the salient poles 61c, 61d, 61e) is larger than the magnetic attraction force between the magnet 50 and the second auxiliary pole (the salient pole 61a).

  Therefore, the rotor 5 rotates in a state of receiving a side pressure (radial biasing force: indicated by an arrow F) toward the side opposite to the first angle range θ1 where the main pole (the salient poles 61f and 61b) is located. To do. Therefore, since the vibration of the rotor 5 is small, the sound volume generated when the rotor 5 is rotated can be reduced, and the noise can be reduced.

[Embodiment 2]
FIG. 6 is an explanatory view schematically showing a gap space between the salient pole 61 and the magnet 50 in the motor 1 used in the motor apparatus 100 according to Embodiment 2 of the present invention. 7 is an explanatory diagram of the stator core 60 of the motor 1 used in the motor apparatus 100 according to Embodiment 2 of the present invention. FIGS. 7A and 7B are a perspective view of the stator core 60 and the stator core 60. FIG. FIG. Since the basic configuration of this embodiment is the same as that of Embodiment 1, common portions are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 6, in the present embodiment as well, the configuration of the gap space sandwiched between the tip portions 610f and 610 of the main poles (the salient poles 61f and 61b) and the outer peripheral surface of the magnet 50, as in the first embodiment, The configuration of the gap space sandwiched between the tip portions 610 c, 610 d, and 610 e of the first complementary pole (the salient poles 61 c, 61 d, 61 e) and the outer peripheral surface of the magnet 50 is different. For this reason, between the rotor 5 and the stator core 60, the rotor 5 is located on the side opposite to the side where the main pole (saliency poles 61f, 61b) is located and on the side where the main pole (saliency poles 61f, 61b) is located. A radial suction force biasing one of them is generated. More specifically, first, in the six salient poles 61, the intervals between the tip portions 610 a to 610 f and the outer peripheral surface of the magnet 50 are the same. In this embodiment, in the six salient poles 61, the widths of the tip portions 610a to 610f are the same.

Further, in the two main poles (the salient poles 61f and 61b), the tip portions 610f and 610b have the same thickness t1, and in the three first complementary poles (the salient poles 61c, 61d and 61e), the tip portions 610c and 610c, 610d and 610e have the same thickness t2. However, the thickness t1 and the thickness 2 are different.

  In this embodiment, the thickness t1 is thicker than the thickness t2. For this reason, the magnetic attraction force between the magnet 50 and the main pole (the salient poles 61f and 61b) is different from the magnetic attraction force between the magnet 50 and the first auxiliary pole (the salient poles 61c, 61d and 61e). The magnetic attraction force between the magnet 50 and the main pole (saliency poles 61f, 61b) is larger than the magnetic attraction force between the magnet 50 and the first auxiliary pole (saliency poles 61c, 61d, 61e). It is.

  In this embodiment, a salient pole 61a (second auxiliary pole) in which the coil 9 is not disposed is provided between the two main poles (surge poles 61f and 61b). The tip portion 610a of the salient pole 61a has a thickness t1, which is equal to the thickness t1 of the tip portions 610f and 610b of the main pole (the salient poles 61f and 61b). For this reason, the magnetic attraction force between the magnet 50 and the second auxiliary pole (the salient pole 61a) is larger than the magnetic attraction force between the magnet 50 and the first auxiliary pole (the salient poles 61c, 61d, 61e).

  Accordingly, the rotor 5 rotates in a state of receiving a side pressure (radial biasing force: indicated by an arrow F) toward the first angle range θ1 where the main poles (the salient poles 61f and 61b) are located. Therefore, since the vibration of the rotor 5 is small, the sound volume generated when the rotor 5 is rotated can be reduced, and the noise can be reduced.

  In addition, when the coil 9 is energized, the main pole (the salient poles 61f and 61b) has a larger force for attracting the rotor 5 than the first auxiliary pole (the salient poles 61c, 61d and 61e). In addition, the thickness t1 of the front end portions 610f and 610b of the main pole (the salient poles 61f and 61b) is thicker than the thickness t2 of the front end portions 610c, 610d and 610e of the first auxiliary pole (the salient poles 61c, 61d and 61e). It is. Therefore, the rotor 5 rotates in a state in which the side pressure toward the first angle range θ1 where the main poles (the salient poles 61f and 61b) are located (radial biasing force: indicated by the arrow F) is reliably received. Therefore, since the vibration of the rotor 5 is small, the sound volume generated when the rotor 5 is rotated can be reduced, and the noise can be reduced.

  In realizing this configuration, in this embodiment, as shown in FIG. 7, the stator core 60 is a laminated core in which three magnetic plates 601, 602, and 603 are laminated. Among them, in at least one magnetic plate, a portion constituting the salient pole 61 having a thin tip portion is made shorter than other magnetic plates.

  More specifically, in this embodiment, in the magnetic plates 601, 602, and 603, the lengths of the portions constituting the main pole (the salient pole 61f) are equal, and the lengths of the portions constituting the main pole (the salient pole 61b) are equal. Moreover, the length of the part which comprises a 2nd complement pole (salient pole 61a) in the magnetic plates 601, 602, and 603 is equal. Accordingly, the thicknesses t1 of the leading end portions 610f and 610b of the main pole (the salient poles 61f and 61b) and the leading end portion 610a of the second auxiliary pole (the salient pole 61a) are the thicknesses of the three magnetic plates 601, 602 and 603. It is the sum of the numbers.

In contrast, the lengths of the magnetic plates 602 and 603 that constitute the first complementary pole (the salient pole 61c) are equal, but the magnetic plate 601 has a length that constitutes the first complementary pole (the salient pole 61c). This is shorter than the length of the portion of the magnetic plates 602 and 603 that constitutes the first complementary pole (the salient pole 61c). Further, the lengths of the parts constituting the first complementary pole (saliency pole 61d) in the magnetic plates 602 and 603 are equal, but the lengths of the parts constituting the first complementary pole (salient pole 61d) in the magnetic plate 601 are The magnetic plates 602 and 603 are shorter than the length of the portion constituting the first supplemental pole (the salient pole 61d). Further, the lengths of the portions constituting the first complementary pole (saliency pole 61e) in the magnetic plates 602 and 603 are equal, but the lengths of the portions constituting the first complementary pole (saliency pole 61e) in the magnetic plate 601 are The magnetic plates 602 and 603 are shorter than the length of the portion that constitutes the first complementary pole (the salient pole 61e). Therefore,
The thickness t2 of the tip portions 610c, 610d, and 610e of the first complementary pole (the salient poles 61c, 61d, and 61e) is the sum of the thicknesses of the two magnetic plates 602 and 603. The above configuration can be applied even when the number of magnetic plates is two or four or more. In this embodiment, the length of the portion constituting the salient pole 61 in the magnetic plate 601 provided at the end in the thickness direction is different from the length of the portion constituting the salient pole 61 in the other magnetic plates 602 and 603. However, the length of the portion constituting the salient pole 61 in the magnetic plate 602 provided between the thickness directions is made different from the length of the portion constituting the salient pole 61 in the other magnetic plates 601 and 603. Also good.

[Modification of Embodiment 2]
FIG. 8 is an explanatory view schematically showing a gap space between the salient pole 61 and the magnet 50 in the motor 1 used in the motor apparatus 100 according to the modification of the second embodiment of the present invention. FIG. 9 is an explanatory diagram of the stator core 60 of the motor 1 used in the motor device 100 according to the modification of the second embodiment of the present invention. FIGS. 9A and 9B are perspective views of the stator core 60. 2 is an exploded perspective view of a stator core 60. FIG. Since the basic configuration of this embodiment is the same as that of Embodiment 1, common portions are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 8, in this embodiment as well, in the present embodiment, the configuration of the gap space sandwiched between the tip portions 610f and 610 of the main poles (the salient poles 61f and 61b) and the outer peripheral surface of the magnet 50, The configuration of the gap space sandwiched between the tip portions 610 c, 610 d, and 610 e of the first complementary pole (the salient poles 61 c, 61 d, 61 e) and the outer peripheral surface of the magnet 50 is different. For this reason, between the rotor 5 and the stator core 60, the rotor 5 is located on the side opposite to the side where the main pole (saliency poles 61f, 61b) is located and on the side where the main pole (saliency poles 61f, 61b) is located. A radial suction force biasing one of them is generated. More specifically, first, in the six salient poles 61, the intervals between the tip portions 610 a to 610 f and the outer peripheral surface of the magnet 50 are the same. In this embodiment, in the six salient poles 61, the widths of the tip portions 610a to 610f are the same.

  Further, in the two main poles (the salient poles 61f and 61b), the tip portions 610f and 610b have the same thickness t1, and in the three first complementary poles (the salient poles 61c, 61d and 61e), the tip portions 610c and 610c, 610d and 610e have the same thickness t2. However, the thickness t1 and the thickness 2 are different.

  In this embodiment, the thickness t2 is thicker than the thickness t1. For this reason, the magnetic attraction force between the magnet 50 and the main pole (the salient poles 61f and 61b) is different from the magnetic attraction force between the magnet 50 and the first auxiliary pole (the salient poles 61c, 61d and 61e). The magnetic attraction force between the magnet 50 and the first auxiliary pole (the salient poles 61c, 61d, 61e) is larger than the magnetic attraction force between the magnet 50 and the main pole (the salient poles 61f, 61b). It is.

  In this embodiment, a salient pole 61a (second auxiliary pole) in which the coil 9 is not disposed is provided between the two main poles (surge poles 61f and 61b). The tip portion 610a of the salient pole 61a has a thickness t1, which is equal to the thickness t1 of the tip portions 610f and 610b of the main pole (the salient poles 61f and 61b). For this reason, the magnetic attraction force between the magnet 50 and the first complementary pole (the salient poles 61c, 61d, 61e) is larger than the magnetic attraction force between the magnet 50 and the second auxiliary pole (the salient pole 61a).

  Therefore, the rotor 5 rotates in a state of receiving a side pressure (radial biasing force: indicated by an arrow F) toward the side opposite to the first angle range θ1 where the main pole (the salient poles 61f and 61b) is located. To do. Therefore, since the vibration of the rotor 5 is small, the sound volume generated when the rotor 5 is rotated can be reduced, and the noise can be reduced.

In realizing this configuration, in the present embodiment, as shown in FIG.
Is a laminated core in which three magnetic plates 601, 602, 603 are laminated, so that at least one of the magnetic plates 601, 602, 603 is thicker at the tip than the other magnetic plates. A portion constituting the thin salient pole 61 is shortened.

  More specifically, in this embodiment, the lengths of the portions constituting the first supplemental pole (the salient pole 61c) in the magnetic plates 601, 602, and 603 are equal, and the first supplemental pole (in the magnetic plates 601, 602, and 603) The lengths of the portions constituting the salient poles 61d) are equal, and the lengths of the portions constituting the first complementary pole (the salient pole 61d) in the magnetic plates 601, 602, 603 are equal. Therefore, the thickness t2 of the tip portions 610c, 610d, and 610e of the first complementary poles (the salient poles 61c, 61d, and 61e) is the sum of the thicknesses of the three magnetic plates 601, 602, and 603.

  On the other hand, the lengths of the portions constituting the main pole (the salient pole 61f) in the magnetic plates 602 and 603 are equal, but the lengths of the portions constituting the main pole (the salient pole 61f) in the magnetic plate 601 are magnetic. It is shorter than the length of the part which comprises the main auxiliary pole (salient pole 61f) in board 602,603. In addition, although the lengths of the portions constituting the main pole (the salient pole 61b) in the magnetic plates 602 and 603 are equal, the lengths of the portions constituting the main pole (the salient pole 61b) in the magnetic plate 601 are the same as those of the magnetic plate 602, In 603, it is shorter than the length of the part which comprises the main complementary pole (salient pole 61b). In addition, the lengths of the portions constituting the second supplemental pole (the salient pole 61a) in the magnetic plates 602 and 603 are equal, but the lengths of the portions constituting the second supplemental pole (the salient pole 61a) in the magnetic plate 601 are The magnetic plates 602 and 603 are shorter than the length of the portion constituting the second complementary pole (the salient pole 61a). Therefore, the thicknesses t1 of the tip portions 610f and 610b of the main pole (the salient poles 61f and 61b) and the tip portion 610a of the second auxiliary pole (the salient pole 61a) are equal to the thicknesses of the two magnetic plates 602 and 603. It is sum. The above configuration can be applied even when the number of magnetic plates is two or four or more. In this embodiment, the length of the portion constituting the salient pole 61 in the magnetic plate 601 provided at the end in the thickness direction is different from the length of the portion constituting the salient pole 61 in the other magnetic plates 602 and 603. However, the length of the portion constituting the salient pole 61 in the magnetic plate 602 provided between the thickness directions is made different from the length of the portion constituting the salient pole 61 in the other magnetic plates 601 and 603. Also good.

[Embodiment 3]
FIG. 10 is an explanatory view schematically showing a gap space between the salient pole 61 and the magnet 50 in the motor 1 used in the motor apparatus 100 according to Embodiment 3 of the present invention. Since the basic configuration of this embodiment is the same as that of the embodiment, common portions are denoted by the same reference numerals, and description thereof is omitted.

  As shown in FIG. 10, in this embodiment, the magnet 50 is provided with S poles and N poles on the outer peripheral surface alternately at equal angular intervals in the circumferential direction. In this embodiment, in the magnet 50, five pairs of S poles and N poles are formed. For this reason, in the magnet 50, since the S pole and the N pole are formed at equal angular intervals, a total of 10 poles, the angular positions of the S pole and the N pole adjacent in the circumferential direction are shifted by 36 °. .

  In the stator core 60, three salient poles 61 are formed at equal angular intervals in the circumferential direction, and the angular positions of the salient poles 61 adjacent in the circumferential direction are shifted by 120 °.

In the stator core 60 configured in this manner, of the three salient poles 61, the two salient poles 61a and 61b located in the first angle range θ1 of less than 180 ° are used as main poles on which the coil 9 is disposed. Is done. In this embodiment, the two salient poles 61a and 61b are formed in a first angle range θ1 of 120 °. On the other hand, of the plurality of salient poles 61, a virtual bisector La that bisects the first angle range θ1 on the side opposite to the side where the two salient poles 61a and 61b (main poles) are located. The salient pole 61c located in the second angle range θ2 of 180 ° centered on the extended line Lb is a first complementary pole in which the coil 9 is not disposed. In this embodiment, since there are three salient poles 61, there is no complementary pole (second complementary pole) between the two main poles (the salient poles 61a and 61b). For this reason, in the connection part 65, it cut | disconnects in the part pinched | interposed into two main poles (salient pole 61a, 61b), and the discontinuous part 69 is formed.

  Also in the motor 1 configured as described above, as in the first and second embodiments and their modifications, the motor 1 is sandwiched between the tip portions 610a and 610b of the main poles (the salient poles 61a and 61b) and the outer peripheral surface of the magnet 50. If the configuration of the clearance space is different from the configuration of the clearance space sandwiched between the tip portion 610c of the first auxiliary pole (the salient pole 61c) and the outer peripheral surface of the magnet 50, between the rotor 5 and the stator core 60, The radial attraction force that urges the rotor 5 to one of the side where the main pole (the salient poles 61f and 61b) is located and the side opposite to the side where the main pole (the salient poles 61f and 61b) is located. Can be generated. Therefore, vibration of the rotor 5 can be reduced.

[Embodiment 4]
FIG. 11 is an explanatory view schematically showing a gap space between the salient pole 61 and the magnet 50 in the motor 1 used in the motor apparatus 100 according to Embodiment 4 of the present invention. Since the basic configuration of this embodiment is the same as that of the embodiment, common portions are denoted by the same reference numerals, and description thereof is omitted.

  As shown in FIG. 11, in this embodiment, the magnet 50 is provided with S poles and N poles on the outer peripheral surface alternately at equal angular intervals in the circumferential direction. In this embodiment, the magnet 50 has four pairs of S poles and N poles. For this reason, in the magnet 50, since the S pole and the N pole are formed at equal angular intervals, a total of 8 poles, the angular positions of the S pole and the N pole adjacent in the circumferential direction are shifted by 45 °. .

  Ten salient poles 61 are formed in the stator core 60 at equal angular intervals in the circumferential direction, and the angular positions of the salient poles 61 adjacent in the circumferential direction are shifted by 36 °.

  In this embodiment, of the ten salient poles 61, the two salient poles 61e and 61g located in the first angle range θ1 of less than 180 ° are used as main poles on which the coil 9 is disposed. In this embodiment, the two salient poles 61e and 61g are formed in a first angle range θ1 of 72 °. In this embodiment, since the angle formed by the two main poles (the salient poles 61e and 61g) is narrow, when the coil bobbin 7 is attached to the main pole (the salient poles 61e and 61g), the first gear 41 shown in FIG. There is no space to do. Therefore, in this embodiment, the main poles (the salient poles 61e and 61g) are located on the opposite side of the first gear 41 shown in FIG. 1 with respect to the rotation center axis L0.

  On the other hand, of the plurality of salient poles 61, an extension of a virtual bisector La that bisects the first angle range θ1 on the side opposite to the side where the two salient poles 61e and 61g (main poles) are located. The salient poles 61a, 61b, 61c, 61i, 61i positioned in the second angle range θ2 of 180 ° centered on Lb are first complementary poles around which the coil 9 is not disposed. The stator core 60 is provided with a salient pole 61f (second auxiliary pole) in which the coil 9 is not disposed between the two salient poles 61e and 61g (main pole). The stator core 60 is formed with salient poles 61d and 61h (third auxiliary poles) between which the coil 9 is not disposed between the first angle range θ1 and the second angle range θ2.

Also in the motor 1 configured as described above, as in the first and second embodiments and their modifications, the motor 1 is sandwiched between the tip portions 610e and 610g of the main poles (the salient poles 61e and 61g) and the outer peripheral surface of the magnet 50. It is sandwiched between the configuration of the gap space, the tip of the first complementary pole (saliency poles 61a, 61b, 61c, 61i, 61i), the tip of the tip 610a, 610b, 610c, 610i, 610i) and the outer peripheral surface of the magnet 50. If the configuration of the gap space is different, the rotor 5 is disposed between the rotor 5 and the stator core 60 on the side where the main poles (the salient poles 61f and 61b) are located, and the main pole (the salient pole 61).
f, 61b) can generate a radial suction that biases one of the opposite sides of the side where it is located. Therefore, vibration of the rotor 5 can be reduced. At that time, the configuration of the gap space sandwiched between the tip 610f of the second auxiliary pole (the salient pole 61f) and the outer peripheral surface of the magnet 50 is the tip 610e, 610g of the main pole (the salient pole 61e, 61g) and the magnet. It is preferable to have the same configuration as the gap space sandwiched between the 50 outer peripheral surfaces.

[Other embodiments]
In the above embodiment, the configuration of the gap space sandwiched between the tip portions 610a and 610b of the main poles (the salient poles 61a and 61b) and the outer peripheral surface of the magnet 50, and the tip portion of the first auxiliary pole (the salient pole 61c) In changing the configuration of the gap space sandwiched between 610c and the outer peripheral surface of the magnet 50, the width or thickness of the tip portion of the salient pole 61 was changed, but the width and thickness of the tip portion of the salient pole 61 were changed. Both may be changed. Further, in addition to the above configuration, the distance between the tip portions 610a, 610b of the main poles (the salient poles 61a, 61b) and the outer peripheral surface of the magnet 50, the tip portion 610c of the first complementary pole (the salient pole 61c), and the magnet You may change the space | interval with 50 outer peripheral surfaces.

  In the above embodiment, the configuration of the gap space (the width and thickness of the tip portion of the main pole) sandwiched between the tip portion of the main pole and the outer peripheral surface of the magnet 50 is the same in the two main poles. However, the two main poles adopt a configuration in which the configuration of the gap space (width and thickness of the front end portion of the main pole) sandwiched between the front end portion of the main pole and the outer peripheral surface of the magnet 50 is different. May be.

  In the first and second embodiments, etc., in the plurality of first complementary poles, the configuration of the gap space sandwiched between the distal end portion of the first complementary pole and the outer peripheral surface of the magnet 50 (the width of the distal end portion of the first complementary pole) In the plurality of first complementary poles, the configuration of the gap space sandwiched between the distal end portion of the first complementary pole and the outer peripheral surface of the magnet 50 (of the distal end portion of the first complementary pole) You may employ | adopt the structure from which a width | variety and thickness) differ.

  In the above embodiment, the example in which the motor device 100 is applied to the pointer-type display device 200 has been described. However, the present invention may be applied to a device other than the motor device 100 for the pointer-type display device.

1 .. Motor 5. Rotor 6. Stator 7. Coil bobbin 9. Coil 10.. Output shaft (output member)
50 ·· Magnet 60 · · Stator core 61, 61a to 61j · · Salient pole 100 · · Motor device 200 · · Pointer type display device 601, 602, 603 · · Magnetic plate θ1 · · First angle range θ2 · · · Second Angle range L0 ・ ・ Rotation center axis of rotor

Claims (10)

A rotor provided with magnets in which S poles and N poles are alternately provided in the circumferential direction;
A stator core in which a plurality of salient poles whose tip portions are opposed to each other with a gap on the outer circumferential surface of the magnet are arranged in the circumferential direction;
A coil disposed around each of two main poles located in a first angle range of less than 180 ° of the plurality of salient poles;
Have
Of the plurality of salient poles, a second 180 ° centered on an extension of a virtual bisector that bisects the first angle range on the side opposite to the side where the two main poles are located. The salient pole located in the angular range is the first complementary pole in which the coil is not disposed around,
The configuration of the gap space sandwiched between the tip portion of the main pole and the outer peripheral surface of the magnet is different from the configuration of the gap space sandwiched between the tip portion of the first auxiliary pole and the outer peripheral surface of the magnet. Thus, between the rotor and the stator core, a radial attractive force that biases the rotor to one of the side on which the main pole is located and the side opposite to the side on which the main pole is located. A motor characterized by the occurrence of   The width of the leading end portion of the main pole and the width of the leading end portion of the first complementary pole are different, so that the rotor is placed on the side where the main pole is located between the rotor and the stator core, 2. The motor according to claim 1, wherein a radial attracting force is generated to urge one of the sides opposite to the side where the main pole is located. Between the two main poles, there is a second complementary pole without a coil arranged around,
The motor according to claim 2, wherein a width of the second auxiliary pole is equal to a width of the main pole.   A radial that urges the rotor toward the side where the main pole is located between the rotor and the stator core because the width of the tip of the main pole is wider than the width of the tip of the first auxiliary pole. The motor according to claim 2, wherein a suction force in a direction is generated.   The thickness of the tip of the main pole is different from the thickness of the tip of the first complementary pole, so that the rotor is positioned between the rotor and the stator core, the side where the main pole is located, 2. The motor according to claim 1, wherein a radial attracting force is generated to urge one of the sides opposite to the side where the main pole is located. The stator core is a laminated core in which a plurality of magnetic plates are laminated,
Of the plurality of magnetic plates, at least one of the magnetic plates has a shorter portion of the main pole and the first auxiliary pole that constitutes a salient pole having a thin tip at the tip than the other magnetic plate. The motor according to claim 5, wherein the thickness of the tip portion of the main pole is different from the thickness of the tip portion of the first complementary electrode. Between the two main poles, there is a second complementary pole without a coil arranged around,
The motor according to claim 5 or 6, wherein a thickness of a tip portion of the second auxiliary pole is equal to a thickness of the main pole.   When the thickness of the tip portion of the main pole is larger than the thickness of the tip portion of the first auxiliary pole, the rotor is biased to the side where the main pole is located between the rotor and the stator core. The motor according to claim 5, wherein a suction force in a radial direction is generated. A motor device comprising the motor according to any one of claims 1 to 8,
A train wheel for transmitting rotation of the rotor;
An output member to which rotation of the rotor is transmitted via the wheel train;
The motor apparatus characterized by having. A pointer-type display device using the motor device according to claim 9,
A pointer-type display device, wherein a pointer is driven by the output member.

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