JP4355736B2 - Motor and mobile phone - Google Patents

Description

  The present invention relates to a motor and a mobile phone including a power supply terminal that receives power supply in contact with a power supply unit of a circuit board.

  Patent Document 1 discloses a motor having a conventional power supply terminal. As shown in FIG. 12, the conventional power supply terminal 150 includes a first portion in which one end 100 of the attachment portion 103 is attached to the motor terminal and extends linearly from the other end 105 of the attachment portion 103 along the rear end surface of the motor. 110, a second portion that forms a U-shaped portion 125 that protrudes in a curved shape toward the front end of the motor continuously from the first portion 110, and a circuit board that is continuous to the second portion. And a third portion having a grounding portion 135 in contact with the power feeding portion of the circuit board on the top of the bending portion on the circuit board side.

Japanese Patent No. 3349118

  However, in the related art described in Patent Document 1 described above, when the grounding portion 135 of the power supply terminal 150 and the power supply portion 3 of the circuit board 31 are pressed against each other as shown in FIG. At the center of curvature 130, a rotational moment is generated toward the circuit board 31 with the arm length S with the lower end 115 of the first portion as a fulcrum. It deforms as follows. Other electrodes and the like are arranged on the circuit board in addition to the power feeding unit. However, in order to prevent a short circuit of the circuit board 31, there is a restriction that this contact must be avoided in the design of the circuit board 31. Further, stress concentrates on the lower end 115 of the first portion and the folding point 130 of the U-shaped portion 125, and the elasticity of the power supply terminal 150 deteriorates, so that the power supply portion 3 of the circuit board 31 and the ground portion 135 of the power supply terminal 150 There was a problem that the contact pressure could not be kept high.

  The present invention prevents the deformation of the power supply terminal in contact with a portion other than the external power supply portion of the circuit board when the grounding portion of the power supply terminal and the power supply portion of the circuit board are in pressure contact, and the elasticity of the power supply terminal. The purpose is to reduce deterioration.

In order to solve the above-described problem, the invention described in claim 1 is a motor including a power feeding terminal that receives power feeding in contact with a power feeding portion of a circuit board, and the power feeding terminal has one end at the rear end of the motor. A first portion that is attached and extends linearly toward the circuit board side along the rear end of the motor, a second portion that protrudes in a curved shape toward the circuit board side continuously to the first portion, and a second portion that continues to the second portion A third portion in which a U-shaped portion projecting in a curved shape on the front end side of the motor is provided between the motor and the circuit board, a curved portion projecting to the circuit board side continuously to the third portion, and the circuit board side of the curved portion And a fourth portion having a grounding portion in contact with the power feeding portion of the circuit board, the second portion is located in front of the first portion, and the power feeding portion of the circuit board and the grounding portion of the fourth portion are When the pressure contact is made, the top of the second portion and the fourth portion are in pressure contact with each other.

The invention described in claim 2 is a motor including a power supply terminal that receives power supply in contact with a power supply unit of a circuit board, and the power supply terminal has one end attached to the rear end of the motor, and the motor rear end. A first portion extending linearly to the circuit board side along the second portion, a second portion projecting in a curved shape toward the circuit board side continuously with the first portion, and a curved shape toward the motor front end side continuously with the second portion. A third part provided with a protruding U-shaped part between the motor and the circuit board, a curved part projecting toward the circuit board side continuously to the third part, and a power feeding part of the circuit board at the top part of the curved part on the circuit board side A fourth portion having a grounding portion in contact with the second portion , wherein the second portion protrudes in a curved shape behind the first portion and is located closer to the circuit board than the U-shaped portion of the third portion. When the power feeding part and the grounding part of the fourth part are in pressure contact, the curved part of the second part and the fourth part are in pressure contact And wherein the door.

The invention described in claim 3 is characterized in that, in the invention described in claim 1 or 2 , a weight is eccentrically fixed to the rotating shaft.

According to a fourth aspect of the present invention, there is provided a cellular phone comprising the motor according to the third aspect.

  According to the first aspect of the present invention, as shown in FIG. 1A or 2A, when the grounding portion 27 of the power feeding terminal 5 and the power feeding portion 3 of the circuit board 31 are in pressure contact, the second The U-shaped portion 24 of the third portion 23 moves toward the front end of the motor 1 while contacting the lower end 37 of the resin base 35 while the U-shaped portion 24 of the third portion 23 is elastically deformed so that the curve of the portion 17 opens. The rotational moment toward the circuit board 31 having the center of curvature 36 of the portion 24 as an action point is a fulcrum at the apex 18 of the curvature of the second portion 17 and is smaller than the conventional power supply terminal 150. The distance that the part 24 moves toward the circuit board 31 is small. Therefore, the U-shaped portion 24 of the power supply terminal 5 does not come into contact with the circuit board 31, and in order to prevent a short circuit or the like of the circuit board 31, special consideration must be taken in designing the periphery of the power supply part 3 of the circuit board 31. Absent. Since the second portion 17 of the power supply terminal 5 is curved, when the grounding portion 27 of the power supply terminal 5 and the power supply portion 3 of the circuit board 31 are in pressure contact, the second portion 17 is elastically deformed, and the first portion The stress concentrated on the lower end 16 and the folded portion 20 of the U-shaped portion 24 of the third portion 23 can be dispersed, and the deterioration of the elasticity of the power supply terminal 5 can be reduced.

As shown in FIG. 1B or FIG. 2B, when the power feeding portion 3 of the circuit board 31 and the grounding portion 27 of the power feeding terminal 5 are in pressure contact, the curve of the U-shaped portion 24 of the third portion 23 is closed. The top 18 of the curve of the second portion 17 and the fourth portion 25 are in pressure contact with each other. Therefore, the fourth portion 25 receives the pressing force 30 from the second portion 17 toward the circuit board 31 side at the contact portion 28, so that the curvature of the second portion 17 is elastically closed. And the ground portion 27 of the power supply terminal 5 can be brought into pressure contact with the power supply portion 3 of the circuit board 31 by a combined pressure of the pressure at which the curvature of the U-shaped portion 24 of the third portion 23 is elastically opened. The contact stability between the portion 27 and the power feeding portion 3 can be made higher than that of the conventional power feeding terminal 150.

According to the second aspect of the present invention, when the grounding portion 27 of the power supply terminal 5 and the power supply portion 3 of the circuit board 31 are in pressure contact as shown in FIG. The U-shaped portion 24 of the terminal 5 rotates using the bending vertex 18 of the second portion 17 as a fulcrum, but before the rotation, the U-shaped portion 24 is positioned closer to the motor body (motor case) 7 than the bending vertex. Even if it moves toward the side, it is possible to prevent contact with the circuit board 31, and in order to prevent a short circuit or the like of the circuit board 31, it is not necessary to give special consideration to the design around the power feeding portion 3 of the circuit board 31. Since the second portion 17 of the power supply terminal 5 is curved, when the grounding portion 27 of the power supply terminal 5 and the power supply portion 3 of the circuit board 31 are in pressure contact, the second portion 17 is elastically deformed, and the first portion The stress concentrated on the lower end 16 and the folded portion 20 of the U-shaped portion 24 of the third portion 23 can be dispersed, and the deterioration of the elasticity of the power supply terminal 5 can be reduced. When the grounding portion 27 of the power supply terminal 5 and the power supply portion 3 of the circuit board 31 are in pressure contact, the power supply terminal 5 closes the curve of the U-shaped portion 24 of the third portion 23 and the curve of the second portion 17 is the first. The curved portions 26 of the four portions 25 are pressed to open and elastically deform. Therefore, the grounding portion 27 is fed with a combined pressure 44 of the pressing force 40 that closes the bending portion 26 of the fourth portion 25 by elasticity and the pressure 42 that acts to open the bending of the U-shaped portion 24 by elasticity. The part 3 can be pressed. Furthermore, since the grounding portion 27 is directly pressed against the power feeding portion 3 of the circuit board 31 by the pressing force 40, the contact stability between the grounding portion 27 and the power feeding portion 3 can be enhanced .

According to the third aspect of the present invention, the same effect as that of the first or second aspect of the invention can be achieved, and even if the motor 1 itself that eccentrically fixes the weight 9 to the rotary shaft 8 vibrates, the circuit board The contact stability between the power supply unit 3 of 31 and the grounding unit 27 of the power supply terminal 5 can be increased.

According to the invention described in claim 4 , the same effect as that of the invention described in claim 3 can be obtained, and a vibration motor can be built in the mobile phone.

  Hereinafter, a first embodiment of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1A is a longitudinal sectional view showing a motor before pressure contact between the power feeding terminal and the power feeding portion of the circuit board, and FIG. 1B is a longitudinal sectional view showing the motor after pressure welding between the power feeding terminal and the power feeding portion of the circuit board. FIG. 2 (a) is a longitudinal sectional view showing the power supply terminal according to the present embodiment extracted before the pressure contact between the power supply terminal and the power supply portion of the circuit board, and FIG. 2 (b) is a diagram of the power supply terminal and the circuit board. FIG. 3 is a longitudinal sectional view showing the power supply terminal according to the present embodiment extracted after the pressure contact with the power supply unit, and FIG. 3 shows the displacement and contact of the grounding part of the power supply terminal when the power supply terminal and the power supply unit of the circuit board are pressure contacted. It is the figure which represented the relationship with a pressure on a graph. 4 is a plan view of the motor viewed from the circuit board side, and FIG. 5 is a plan view of the rear end surface of the motor. FIG. 6 is a perspective view showing the power supply terminal according to the present embodiment extracted before the pressure contact between the power supply terminal and the power supply portion of the circuit board.

  The motor 1 according to the present embodiment is used as a vibration motor for a mobile phone. The motor 1 includes a rotor having a rotation shaft 8, a motor case 7 having a stator, and a power supply terminal 5 that receives power supply in contact with the power supply unit 3 of the circuit board 31. In the motor 1, a weight 9 is eccentrically fixed to a rotary shaft 8.

  The stator is composed of a magnet (permanent magnet) having N and S poles, and is held by a magnet holder fixed inside a cylindrical metal motor case 7. A rotor formed of a coil is accommodated inside the motor case 7. A rotating shaft 8 supported by a bearing is fixed at the center of the rotor, and the rotating shaft 8 projects from the front end of the motor case 7.

  In the motor case 7, a commutator is fixed to the rotating shaft 8, and a pair of brushes are in contact with the commutator. A mounting portion 13 for the power supply terminal 5 is fixed to each brush. A substantially semi-cylindrical weight 9 is eccentrically fixed to the tip of the rotating shaft 8. The motor case itself can be vibrated by rotating the rotating shaft 8 and swinging the weight 9. The motor case 7 is covered with a rubber holder 11, and the rubber holder 11 holds the motor case 7 so that the motor 1 vibrates integrally with the mobile phone housing when the motor 1 is incorporated into the mobile phone. To do. Such a motor 1 with a weight is used for a vibration motor that vibrates the casing when receiving a call with a mobile phone or the like.

  The motor 1 is provided with a power supply terminal 5 for electrical connection between the brush and the power supply unit 3 of the circuit board 31. Each power supply terminal 5 is provided corresponding to each brush, and applies a predetermined voltage from the power supply unit 3 of the circuit board 31 to the brush. The power supply terminal 5 is formed of a thin plate made of copper alloy, and the power supply terminal 5 itself has elasticity.

  Hereinafter, the shape of the power supply terminal 5 will be described in detail. As shown in FIGS. 1 and 2, the power supply terminal 5 includes a mounting portion 13, a first portion 15, a second portion 17, a third portion 23, and a fourth portion 25.

  One end 10 of the attachment portion 13 is fixed to each brush by welding, and extends linearly to the rear end of the motor 1 in parallel with the rotation shaft 8.

  The first portion extends linearly from the other end 12 of the attachment portion 13 toward the circuit board 31 along the rear end of the motor 1. The first portion 15 is caulked and fixed to the resin table 35.

  The second portion 17 continues to the lower end 16 of the first portion 15 and protrudes in a curved shape toward the circuit board 31. The second portion 17 is located on the front side of the first portion 15 and is formed in a U-shape with the curved top portion 18 facing the circuit board 31 side. The curve of the second portion 17 is formed so that the angle between the two sides of the U-shape is an obtuse angle. The third portion 23 is formed between the motor 1 and the circuit board 31 so as to be continuous with the front end 19 of the second portion 17 and project in a curved shape toward the front end side of the motor 1. The U-shaped portion 24 is formed in a U-shape with the folded-back portion 20 as a top portion. The third portion 23 is divided into an upper portion 33 and a lower portion 34 with the folded portion 20 as a boundary. The upper part 33 of the U-shaped part 24 is in contact with the lower end 37 of the resin table 35.

  The fourth portion 25 has a curved portion 26 that protrudes toward the circuit board 31 continuously from the rear end 21 of the lower portion 34 of the third portion 23, and the circuit board 31 is on the top of the curved portion 26 on the circuit board 31 side. The power supply unit 3 is in contact with the grounding unit 27. The fourth portion 25 is located rearward of the third portion 23 and continues to the third portion 23 toward the circuit board 31 so as to form an obtuse angle with respect to the lower portion 34 of the third portion 23. .

  As shown in FIGS. 1 and 2, the grounding portion 27 is formed so as to be biased to the front side with respect to the top portion of the curved portion 26 of the fourth portion on the circuit board 31 side. The grounding portion 27 is located closer to the circuit board 31 than the lower end 14 of the rubber holder 11 before the pressure contact with the power feeding portion 3 of the circuit board 31.

Next, the function and effect of the motor according to the present embodiment will be described. According to the present embodiment, as shown in FIG. 1A or 2A, when the ground portion 27 of the power supply terminal 5 and the power supply portion 3 of the circuit board 31 are in pressure contact with each other, The U-shaped portion 24 of the third portion 23 moves toward the front end of the motor 1 while the upper portion 33 is in contact with the lower end 37 of the resin base 35, while the curvature center 36 of the U-shaped portion 24 is moved. The rotational moment toward the circuit board 31 as the action point is a fulcrum at the apex 18 of the curve of the second portion 17 and is smaller than the conventional power supply terminal 150, so the U-shaped portion 24 is on the circuit board 31 side. The distance to move to is small. Therefore, the power supply terminal 5 does not come into contact with any part other than the power supply part 3 of the circuit board 31 without special consideration in the design around the power supply part 3 of the circuit board 31. Can be prevented. Note that the rotational moment N toward the circuit board 31 generated at the center of curvature 36 of the U-shaped portion 24 of the third portion 23 is N = T (arm length) × F (elastic force). The rotational moment R in this case is R = S (arm length) × F (elastic force). Since S> T, R> N.

  Since the second portion 17 of the power supply terminal 5 is curved and has elasticity, when the grounding portion 27 of the power supply terminal 5 and the power supply portion of the circuit board 31 are in pressure contact with each other, the lower end 16 of the first portion and the third portion 23 are The stress concentrated on the folded portion 20 of the U-shaped portion 24 can be dispersed, and the deterioration of the elasticity of the power supply terminal 5 can be reduced.

  Further, as shown in FIG. 1B or FIG. 2B, when the power feeding portion 3 of the circuit board 31 and the grounding portion 27 of the power feeding terminal 5 are in pressure contact, the U-shaped portion 24 of the third portion 23 is curved. Is elastically deformed so as to be closed, and the curved top portion 18 of the second portion 17 and the fourth portion 25 are pressed against each other. Therefore, the fourth portion 25 receives the pressing force 30 from the second portion 17 toward the circuit board 31 side at the contact portion 28, so that the curvature of the second portion 17 is elastically closed. The ground portion 27 of the power supply terminal 5 can be brought into pressure contact with the power supply portion 3 of the circuit board 31 by the combined pressure 38 with the pressure 32 at which the bending of the U-shaped portion 24 of the third portion 23 is elastically opened. In addition, the contact stability between the grounding unit 27 and the power feeding unit 3 can be made higher than that of the conventional power feeding terminal 150.

FIG. 3 is a graph showing the relationship between the displacement of the grounding portion 27 of the power feeding terminal 5 and the contact pressure when the grounding portion 27 of the power feeding terminal 5 and the power feeding portion 3 of the circuit board 31 are in pressure contact in this embodiment . It is. As shown in FIG. 3, when the grounding portion 27 of the power supply terminal 5 comes into pressure contact with the power supply portion 3 of the circuit board 31 and the grounding portion 27 is displaced by 1 mm toward the motor 1, the conventional power supply terminal 150 is used. About twice as much contact pressure was obtained. Experimental data A, B, C, D, and E when the power supply terminal 5 is displaced five times, and experimental data a, b, c, and d when the conventional power supply terminal 150 shown in FIG. 12 is displaced five times In comparison with e and e, it was found that when the power supply terminal 5 is used, a contact pressure about twice as high as that when the conventional power supply terminal 150 is used can be constantly obtained. Furthermore, it was found that even when the power supply terminal 5 was displaced five times, a contact pressure that was the same as when the power supply terminal 5 was displaced for the first time was obtained.

  In the present embodiment, when the grounding portion 27 is in pressure contact with the power feeding portion 3 of the circuit board 31, the grounding portion 27 is elastically deformed so as to open a curve sandwiching the boundary between the third portion 23 and the fourth portion 25. The grounding portion 27 is formed to be biased to the front side of the top portion of the circuit board side 31 of the curved portion 26 of the fourth portion 25, so that the pressure contact with the power feeding portion 3 is performed. Surely made.

  Further, according to the present embodiment, even if the motor 1 itself that eccentrically fixes the weight 9 to the rotating shaft 8 vibrates, the contact stability between the power supply portion of the circuit board and the grounding portion of the power supply terminal can be increased. The motor 1 can be used as a vibration motor for a mobile phone.

  Next, other embodiments will be described. In the following description, parts having the same functions and effects as those of the first embodiment described above are denoted by the same reference numerals, and detailed description of the parts is given. In the following description, differences from the first embodiment will be mainly described.

  As shown in FIG. 7A, in the second embodiment, the second portion 17 of the power supply terminal 5 is formed to be curved in an arc shape behind the first portion 15. The third portion 23 is formed to be continuous with the front end 19 of the second portion 17 so that the U-shaped portion 24 protrudes in the direction toward the front end of the motor 1 so as to approach the motor. FIG. 9 is a perspective view showing the power supply terminal 5 according to the present embodiment before the pressure contact between the power supply terminal 5 and the circuit board 31.

  As shown in FIG. 7B or FIG. 8B, when the ground portion 27 of the power supply terminal 5 and the power supply portion 3 of the circuit board 31 are in pressure contact, the power supply terminal 5 is connected to the U-shaped portion 24 of the third portion 23. The second portion 17 is elastically deformed by being pressed so as to close the curvature and so that the curvature of the second portion 17 opens the curved portion 26 of the fourth portion 25. Therefore, the grounding portion 27 is fed by the combined pressure 44 of the pressing force 40 for closing the bending portion 26 of the fourth portion 25 by elasticity and the pressure 42 for opening the bending of the U-shaped portion 24 by elasticity. 3 can be pressed. Furthermore, since the grounding portion 27 is directly pressed against the power feeding portion 3 of the circuit board 31 by the pressing force 40, the contact stability between the grounding portion 27 and the power feeding portion 3 can be improved as compared with the first embodiment. .

  As shown in FIG. 8 (a), the rotation moment N = V (arm length) × F (elastic force) generated at the center of curvature 36 of the U-shaped portion 24 of the third portion 23 of the power supply terminal 5 gives the third The portion 23 moves toward the circuit board 31, but the U-shaped portion 24 of the third portion 23 of the power supply terminal 5 is formed in the vicinity of the lower end of the motor 1, so that it does not contact the circuit board 31.

  Needless to say, the present invention is not limited to the above-described embodiment, and can be variously modified without departing from the scope of the invention.

In the first embodiment described above, the fourth portion 25 is continuous at an angle with respect to the lower portion 34 of the third portion 23, but the present invention is not limited to this, and as shown in FIG. The four portions 25 may continue linearly with respect to the third portion 23. FIG. 11 is a perspective view showing the power supply terminal 5 according to the present embodiment extracted before the pressure contact between the power supply terminal 5 according to the modification of the first embodiment and the power supply portion 3 of the circuit board 31.
FIG.

(A) It is a longitudinal cross-sectional view showing the motor before the press-contact with the electric power feeding terminal which concerns on 1st Embodiment, and the electric power feeding part of a circuit board. (B) It is a longitudinal cross-sectional view showing the motor after the press-contact of the electric power feeding terminal and the electric power feeding part of a circuit board based on 1st Embodiment. (A) It is the longitudinal cross-sectional view which extracted and represented the electric power feeding terminal which concerns on this Embodiment before the pressure welding of the electric power feeding terminal and the electric power feeding part of a circuit board. FIG. 2B is a longitudinal cross-sectional view showing the power supply terminal according to the present embodiment after the pressure contact between the power supply terminal and the power supply portion of the circuit board. It is the figure which represented the relationship between the displacement of the earthing | grounding part of a power feeding terminal, and a contact pressure at the time of a power feeding terminal and the power feeding part of a circuit board press-contacting. It is a top view of the motor seen from the circuit board side. It is a top view of a motor rear end surface. It is the perspective view which extracted and represented the electric power feeding terminal which concerns on this Embodiment before the pressure welding of the electric power feeding terminal and the electric power feeding part of a circuit board. (A) It is a longitudinal cross-sectional view showing the motor before press-contact with the electric power feeding terminal which concerns on 2nd Embodiment, and the electric power feeding part of a circuit board. (B) It is a longitudinal cross-sectional view showing the motor after the pressure welding of the electric power feeding terminal which concerns on 2nd Embodiment, and the electric power feeding part of a circuit board. (A) It is the longitudinal cross-sectional view which extracted and represented the electric power feeding terminal which concerns on 2nd Embodiment before the pressure welding of the electric power feeding terminal and the electric power feeding part of a circuit board. (B) It is the longitudinal section which extracted and represented the electric power feeding terminal which concerns on 2nd Embodiment after the pressure welding of the electric power feeding terminal and the electric power feeding part of a circuit board. It is the perspective view which extracted and represented the electric power feeding terminal which concerns on 2nd Embodiment before the pressure welding of the electric power feeding terminal and the electric power feeding part of a circuit board. (A) It is a longitudinal cross-sectional view showing the motor before the pressure welding of the electric power feeding terminal which concerns on a modification, and the electric power feeding part of a circuit board. (B) It is a longitudinal cross-sectional view showing the motor after the pressure welding of the electric power feeding terminal which concerns on a modification, and the electric power feeding part of a circuit board. It is the perspective view which extracted and represented the electric power feeding terminal which concerns on the modification of 1st Embodiment before the pressure welding of the electric power feeding terminal and the electric power feeding part of a circuit board. (A) It is a longitudinal cross-sectional view showing the motor before the pressure welding of the conventional electric power feeding terminal and the electric power feeding part of a circuit board. (B) It is a longitudinal cross-sectional view showing the motor after the pressure welding of the conventional electric power feeding terminal and the electric power feeding part of a circuit board.

DESCRIPTION OF SYMBOLS 1 Motor 3 Power supply part of a circuit board 5 Power supply terminal 8 Rotating shaft 9 Weight 15 1st part 17 2nd part 18 Top part of curve of 2nd part 23 3rd part 24 U-shaped part of 3rd part 25 4th part 26 2nd 4 curved parts 27 Grounding part 31 Circuit board

Claims (4)

A motor including a power supply terminal that receives power supply in contact with a power supply unit of a circuit board, and one end of the power supply terminal is attached to the rear end of the motor, and extends linearly toward the circuit board along the motor rear end. A motor and a circuit board include a first part, a second part that protrudes in a curved shape toward the circuit board side continuously to the first part, and a U-shaped part that protrudes in a curved shape to the motor front end side continuously to the second part. A fourth portion having a third portion provided between the first portion, a curved portion projecting to the circuit board side continuously from the third portion, and a ground portion contacting the power feeding portion of the circuit board on the top portion of the curved portion on the circuit board side. And the second part is located in front of the first part, and when the power supply part of the circuit board and the grounding part of the fourth part are in pressure contact with each other, the curved top part of the second part and the fourth part are in pressure contact with each other. A motor characterized by that. A motor including a power supply terminal that receives power supply in contact with a power supply unit of a circuit board, and one end of the power supply terminal is attached to the rear end of the motor, and extends linearly toward the circuit board along the motor rear end. A motor and a circuit board include a first part, a second part that protrudes in a curved shape toward the circuit board side continuously to the first part, and a U-shaped part that protrudes in a curved shape to the motor front end side continuously to the second part. A fourth portion having a third portion provided between the first portion, a curved portion projecting to the circuit board side continuously from the third portion, and a ground portion contacting the power feeding portion of the circuit board on the top portion of the curved portion on the circuit board side. And the second part protrudes in a curved shape behind the first part and is located closer to the circuit board than the U-shaped part of the third part. The power feeding part of the circuit board and the grounding part of the fourth part The curved portion of the second portion and the fourth portion are in pressure contact when the pressure contact is made. Motor. The motor according to claim 1 or 2 , wherein a weight is eccentrically fixed to the rotating shaft. A mobile phone comprising the motor according to claim 3 .

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