JP2023013420A - vibration motor - Google Patents

Abstract

To provide a vibration motor that is improved in degree of freedom of a drawing-out direction of a substrate relative to an enclosure.SOLUTION: A vibration motor 1A has: an enclosure 10 which has a top surface part 11, a bottom surface part 12, a front surface part 13, and a back surface part 14; a vibration body 50 which vibrates inside the enclosure 10; an elastic member 61 which supports the vibration body 50 in a vibratory state inside the enclosure 10; a substrate 30 which has electric wiring formed to supply electric power to a coil generating magnetic flux for letting the vibration body 50 vibrate; and restriction parts 21a, 22a which are provided to the enclosure 10 to restrict vibrations of the vibration body 50 to a predetermined range. The restriction parts 21a, 22a are arranged at positions closer to the front surface part 13 than the center of the enclosure 10 in the facing direction between the front surface part 13 and back surface part 14. The finest part 65a of the elastic member 61 is arranged between the restriction part 21a and restriction part 22a which face each other.SELECTED DRAWING: Figure 5A

Description

The present invention relates to vibration motors.

Today, vibration motors are built into various electronic devices such as smartphones and tablet terminals. An example of a vibration motor built into an electronic device is described in Patent Document 1. A vibration motor described in Patent Document 1 is a linear vibration motor in which a vibrating body vibrates linearly. The vibrating body of the vibration motor described in Patent Document 1 is housed in a housing. The housing accommodates a coil, a substrate, and the like in addition to the vibrating body. The substrate is provided with electrical wiring for supplying power to the coil. A part of the board is arranged inside the housing, and the other part of the board is drawn out of the housing.

JP 2019-176688 A

In order to increase the degree of freedom in layout of the vibration motor, it is desirable to increase the degree of freedom in the direction in which the substrate is pulled out from the housing.

A vibration motor of one embodiment includes a housing including a top surface portion and a bottom surface portion facing each other, a front surface portion and a rear surface portion facing each other, and a right side portion and a left side portion facing each other; and a vibrating body that vibrates in a direction opposite to the left side surface, an elastic member that supports the vibrating body so as to vibrate inside the housing, and a coil that generates a magnetic flux for vibrating the vibrating body. It has a substrate on which electric wiring for supply is formed, and a plurality of restricting portions provided on the housing for restricting the vibration of the vibrating body within a predetermined range. The plurality of restricting portions includes a lower restricting portion that is provided on the bottom surface portion and protrudes toward the top surface portion. The elastic member includes a first fixing portion provided at one end in the longitudinal direction and fixed to the housing; a second fixing portion provided at the other end in the longitudinal direction and fixed to the vibrating body; and an intermediate portion that connects the first fixing portion and the second fixing portion. The lower restricting portion is arranged at a position closer to the front surface portion or the rear surface portion than the center of the bottom surface portion in the facing direction of the front surface portion and the rear surface portion. The intermediate portion of the elastic member tapers gradually from both outer sides toward the inner side in the longitudinal direction, and the narrowest portion of the intermediate portion is disposed between the lower restricting portion and the top surface portion.

According to the present invention, it is possible to realize a vibration motor in which the degree of freedom in the direction in which the substrate is pulled out from the housing is improved.

It is a perspective view which shows the external appearance of a vibration motor. 1 is an exploded perspective view showing the structure of a vibration motor; FIG. FIG. 3 is an exploded perspective view showing the structure of the housing; It is explanatory drawing which shows the position of the control part on a top surface part, and the control part on a bottom surface part. FIG. 2 is a cross-sectional view taken along line AA in FIG. 1; FIG. 2 is a cross-sectional view taken along line BB in FIG. 1; It is a perspective view of an elastic member.

Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings. In addition, in all the drawings for describing the embodiments, the same reference numerals are used for the same or substantially the same configurations and elements, and as a general rule, repeated descriptions are not performed.

<Overview of vibration motor>
FIG. 1 is a perspective view showing the appearance of a vibration motor 1A according to this embodiment. FIG. 2 is an exploded perspective view showing the structure of the vibration motor 1A. FIG. 3 is an exploded perspective view of a housing 10 that constitutes the vibration motor 1A.

The housing 10 is a box having a substantially rectangular planar shape and forms an outer shell of the vibration motor 1A. Inside the housing 10, components of the vibration motor 1A such as a substrate 30, a coil 40, and a vibrating body 50 are housed. A vibrating body 50, which is one of the components of the vibration motor 1A, vibrates inside the housing 10 in the long side direction (longitudinal direction) of the housing 10. As shown in FIG. From another point of view, the vibrating body 50 generates vibration in the longitudinal direction of the housing 10 . That is, the vibration motor 1A is a linear vibration motor that generates vibration in the longitudinal direction of the housing 10 .

In the following description, the long-side direction of the housing 10 may be called the "left-right direction" and the short-side direction of the housing 10 may be called the "front-back direction." Also, the direction perpendicular to both the left-right direction and the front-rear direction may be called the "vertical direction". Using such a name, the vibrating body 50 generates lateral vibration.

<Case>
The housing 10 has a top surface portion 11 and a bottom surface portion 12 facing each other in the vertical direction, a front surface portion 13 and a rear surface portion 14 facing each other in the front-rear direction, and a right side portion 15 and a left side portion 16 facing in the left-right direction. That is, the vibrating body 50 that vibrates in the longitudinal direction (horizontal direction) of the housing 10 vibrates in the direction in which the right side portion 15 and the left side portion 16 face each other.

In the following description, the front surface portion 13, the rear surface portion 14, the right side surface portion 15, and the left side surface portion 16 may be collectively referred to as the "peripheral surface portion 17".

The housing 10 is made of a metal plate (for example, stainless steel plate). However, the top surface portion 11, the bottom surface portion 12, and the peripheral surface portion 17 are formed of separate metal plates. In other words, the housing 10 is formed by a plurality of integrated metal plates.

The peripheral surface portion 17 is formed in a rectangular tubular shape by a strip-shaped metal plate having both ends fixed to each other. Although not shown, both ends of the metal plate forming the peripheral surface portion 17 are positioned on the rear surface portion 14 . More specifically, both ends of the metal plate forming the peripheral surface portion 17 are positioned at the longitudinal center (vibration direction center) of the back surface portion 14 . By arranging both ends of the metal plates fixed to each other on the back surface portion 14, the impact resistance performance of the vibration motor 1A can be enhanced. Specifically, when a force in the front-rear direction is applied to the vibration motor 1A due to a drop or the like, the vibrating body 50 is less likely to come into contact with both ends (fixed portions) of the metal plate forming the peripheral surface portion 17 . Both ends of the metal plate forming the peripheral surface portion 17 are fixed by caulking, for example.

The top surface portion 11 and the bottom surface portion 12 are each formed of a flat metal plate punched into a substantially rectangular shape. The top surface portion 11 closes the opening on one end side of the peripheral surface portion 17 , and the bottom surface portion 12 closes the opening on the other end side of the peripheral surface portion 17 . The peripheral edge of the metal plate forming top surface portion 11 is welded to one end of the metal plate forming peripheral surface portion 17 . Also, the peripheral edge of the metal plate forming the bottom surface portion 12 is welded to the other end of the metal plate forming the peripheral surface portion 17 .

A pair of restricting portions 21 a and 21 b are provided on the left and right sides of the top surface portion 11 . A pair of restricting portions 22 a and 22 b are provided on the left and right sides of the bottom portion 12 . From another point of view, restricting portions 21a and 21b are provided on opposite short sides of the top surface portion 11, respectively. In addition, regulating portions 22a and 22b are provided on opposite short sides of the bottom portion 12, respectively.

That is, four restricting portions 21 a, 21 b, 22 a, and 22 b are provided inside the housing 10 . These restricting portions 21a, 21b, 22a, and 22b are positioned around the vibrating body 50 and restrict the vibration of the vibrating body 50 within a predetermined range. From another point of view, the vibrating body 50 can vibrate between the regulating portions 21a, 22a and the regulating portions 21b, 22b facing each other in the vibrating direction. However, in a normal vibrating state, the vibrating body 50 does not contact the restricting portions 21a, 21b, 22a, 22b. When the vibrating body 50 vibrates (displaces) more than usual for some reason, the vibrating body 50 contacts at least one of the restricting portions 21a, 21b, 22a, and 22b. As a result, excessive vibration of the vibrating body 50 is prevented.

<Arrangement of regulatory section>
FIG. 4 is an explanatory diagram showing the positions of the restricting portions 21a and 21b on the top surface portion 11 and the positions of the restricting portions 22a and 22b on the bottom surface portion 12. As shown in FIG.

The restricting portions 21a and 21b provided on the top surface portion 11 are convex portions formed at predetermined positions on the top surface portion 11 by pressurization and protrude downward. In other words, the restriction portions 21 a and 21 b provided on the top surface portion 11 are upper restriction portions protruding toward the bottom surface portion 12 .

The restricting portions 22a and 22b provided on the bottom portion 12 are protrusions formed at predetermined positions on the bottom portion 12 by pressurization and projecting upward. In other words, the regulating portions 22 a and 22 b provided on the bottom portion 12 are lower regulating portions projecting toward the top portion 11 .

The restricting portions 21a and 21b provided on the top surface portion 11 face each other in the left-right direction (longitudinal direction of the top surface portion 11). Similarly, the restricting portions 22a and 22b provided on the bottom portion 12 face each other in the left-right direction (longitudinal direction of the bottom portion 12).

Furthermore, the restricting portions 21a and 21b are arranged at positions off the center of the top surface portion 11 in the front-rear direction. More specifically, the restricting portions 21 a and 21 b are arranged forward of the center of the top surface portion 11 in the front-rear direction. As a result, the straight line L1 connecting the centers of the two restricting portions 21a and 21b is positioned forward of the straight line (center line) L2 that bisects the top surface portion 11 in the front-rear direction.

Similarly, the restricting portions 22a and 22b provided on the bottom portion 12 are arranged at positions off the center of the bottom portion 12 in the front-rear direction. More specifically, the restricting portions 22a and 22b are arranged forward of the center of the bottom portion 12 in the front-rear direction. As a result, a straight line L1 connecting the centers of the two restricting portions 22a and 22b is positioned forward of a straight line (center line) L2 that bisects the bottom portion 12 in the front-rear direction.

As described above, the top surface portion 11 and the bottom surface portion 12 have the same or substantially the same shape. Therefore, the top surface portion 11 shown in FIG. 2 can become the bottom surface portion 12 by turning it over so that the left and right sides are reversed. Also, the bottom surface portion 12 shown in FIG. 2 can become the top surface portion 11 by turning it over so that the left and right sides are reversed.

5A is a cross-sectional view taken along line AA in FIG. 1. FIG. 5B is a cross-sectional view taken along line BB in FIG. 1. FIG.

As shown in FIG. 5A, the restricting portion 21a provided on the top surface portion 11 and the restricting portion 22a provided on the bottom surface portion 12 face each other in the vertical direction. Further, as shown in FIG. 5B, the restricting portion 21b provided on the top surface portion 11 and the restricting portion 22b provided on the bottom surface portion 12 face each other in the vertical direction.

As described above, the restricting portion 21a shown in FIG. 5A is positioned forward of the center of the top surface portion 11 in the front-rear direction. Further, the restricting portion 22a is positioned forward of the center of the bottom surface portion 12 in the front-rear direction. From another point of view, the restricting portion 21a is arranged at a position closer to the front surface portion 13 than the center of the top surface portion 11 in the direction in which the front surface portion 13 and the rear surface portion 14 face each other. Moreover, the restricting portion 22a is arranged at a position closer to the front portion 13 than the center of the bottom portion 12 in the direction in which the front portion 13 and the rear portion 14 face each other.

As a result, the distance D1 between the regulating portions 21a, 22a and the rear portion 14 is longer (wider) than the distance D2 between the regulating portions 21a, 22a and the front portion 13. As shown in FIG. From another point of view, the space S1 between the regulating portions 21a and 22a and the rear portion 14 is larger (broader) than the space S2 between the regulating portions 21a and 22a and the front portion 13 .

As described above, the restricting portion 21b shown in FIG. 5B is located forward of the center of the top surface portion 11 in the front-rear direction. Further, the restricting portion 22b is positioned forward of the center of the bottom surface portion 12 in the front-rear direction. As a result, the distance D1 between the regulating portions 21b, 22b and the rear portion 14 is longer (wider) than the distance D2 between the regulating portions 21b, 22b and the front portion 13 . From another point of view, the space S1 between the regulating portions 21b, 22b and the rear portion 14 is larger (broader) than the space S2 between the regulating portions 21b, 22b and the front portion 13 .

<Substrate>
A substrate 30 shown in FIG. 2 is a flexible substrate on which electrical wiring for supplying power to a coil 40 shown in the same figure is formed. The substrate 30 is arranged on the bottom portion 12 of the housing 10 . Most of the substrate 30 is arranged inside the housing 10 , while a part of the substrate 30 is drawn out of the housing 10 . In the following description, most of the substrate 30 arranged inside the housing 10 will be referred to as a "main body portion 31", and a portion of the substrate 30 that is drawn out of the housing 10 will be referred to as a "connecting portion 32". They are sometimes called and distinguished.

A connection terminal 33 is provided on the connection portion 32 and is electrically connected to the input end of the electrical wiring formed on the main body portion 31 . The connecting portion 32 extends to the right side of the housing 10 across one short side of the housing 10 . Specifically, the connecting portion 32 is drawn out to the right side of the housing 10 through between the bottom portion 12 and the right side portion 15 .

5A, the connecting portion 32 of the substrate 30 passes through the space S1 between the restricting portion 22a and the rear portion 14. As shown in FIG. That is, the space S<b>1 between the restricting portion 22 a and the rear portion 14 is used as a passage for pulling out the connection portion 32 of the substrate 30 to the outside of the housing 10 .

From another point of view, the space S1 between the restricting portion 22a and the rear surface portion 14 is made larger (broader) than the space S2 between the restricting portion 22a and the front surface portion 13, so that the connection portion 32 can be positioned within the housing 10. can be drawn out of the housing 10 from the short side of the housing 10 .

Note that the space S1 between the restricting portion 22b and the back surface portion 14 shown in FIG. 5B is also larger (broader) than the space S2 between the restricting portion 22b and the front surface portion 13. Therefore, the space S<b>1 between the restricting portion 22 b and the rear portion 14 can also be used as a passage for pulling out the connection portion 32 of the substrate 30 to the outside of the housing 10 .

Furthermore, the long sides of the housing 10 are not provided with a single restricting portion. In other words, there is no member on the long side of the housing 10 that prevents the connection portion 32 from being pulled out.

Therefore, the connecting portion 32 of the substrate 30 can be pulled out in any direction of the front, rear, right and left sides of the housing 10 . For example, the drawing direction of the connecting portion 32 can be selected according to the positional relationship between the housing 10 and the power supply circuit. From another point of view, the possibility that the layout (position and orientation) of the vibration motor 1A in the electronic device is restricted due to the direction in which the connecting portion 32 is pulled out is reduced.

<Coil>
The coil 40 shown in FIG. 2 is a coreless coil (air core coil). More specifically, the coil 40 is formed by a conductive wire wound around an imaginary axis extending in the vertical direction. The coil 40 is connected to the output end of the electrical wiring formed on the body portion 31 of the substrate 30 . Therefore, when a voltage is applied to the connection terminal 33 formed on the connection portion 32, the voltage is applied to the coil 40 via the electric wiring. When a voltage is applied to the coil 40, the coil 40 is magnetized and magnetic flux is generated.

<Vibration body>
Vibrating body 50 shown in FIG. 2 includes weight 51 , back yoke 52 and magnet 53 . The weight 51 is a block of metal alloy (for example, tungsten alloy). Two magnet housing portions 54 are formed in the center of the weight 51 so as to penetrate the weight 51 in the vertical direction.

A magnet 53 is housed in each magnet housing portion 54 . Each magnet 53 is a prismatic permanent magnet extending in the front-rear direction. Each magnet 53 is arranged in the magnet accommodating portion 54 with its longitudinal direction orthogonal to the longitudinal direction of the weight 51 .

When a voltage is applied to the coil 40, the interaction between the magnetic flux generated by the coil 40 and the magnetic flux generated by the magnet 53 causes the vibration body 50 including the magnet 53 to vibrate in the horizontal direction.

The back yoke 52 overlaps the weight 51 and closes the magnet housing portion 54 . From another point of view, the back yoke 52 covers the magnets 53 housed in the magnet housing portion 54 . The back yoke 52 forms a magnetic circuit with the magnet 53 and increases the power of the vibration motor 1A.

<Elastic member>
The two elastic members 61 and 62 shown in FIG. 2 are leaf springs extending in the front-rear direction. A first fixing portion 63 fixed to the housing 10 is provided on one longitudinal end side (base end side) of the elastic members 61 and 62 , and a first fixing portion 63 is provided on the other longitudinal direction end side (distal end side) of the elastic members 61 and 62 . is provided with a second fixing portion 64 fixed to the vibrating body 50 (weight 51).

In the following description, the first fixing portion 63 of the elastic members 61 and 62 may be called "base end portion 63", and the second fixing portion 64 of the elastic members 61 and 62 may be called "tip end portion 64".

FIG. 6 is a perspective view of elastic members 61 and 62. As shown in FIG. As shown in FIG. 6 , the proximal end portions 63 and distal end portions 64 of the elastic members 61 and 62 are connected via an intermediate portion 65 . The proximal end portion 63 and the distal end portion 64 are bent at right angles or substantially right angles with respect to the intermediate portion 65 . As a result, each of the elastic members 61 and 62 has a substantially U-shaped planar shape.

The weight 51 shown in FIG. 2 is arranged between the opposing elastic members 61 and 62 and supported by these elastic members 61 and 62 so as to be able to vibrate. From another point of view, the elastic members 61 and 62 are support members that support the weight 51 so as to vibrate.

Refer to FIG. 6 again. An intermediate portion 65 of each of the elastic members 61 and 62 is tapered from both outer sides in the longitudinal direction toward the inner side. From another point of view, the vertical dimension of the intermediate portion 65 gradually decreases from both longitudinal outer sides toward the inner side. The intermediate portion 65 is narrowest at a portion closer to the base end portion 63 than at the center in the longitudinal direction. From another point of view, the narrowest portion 65a of the intermediate portion 65 is arranged at a position closer to the base end portion 63 than the longitudinal centers of the elastic members 61 and 62 . In FIG. 6, the smallest details 65a are hatched (dot pattern) in order to emphasize the smallest details 65a.

As shown in FIG. 5A , the proximal end 63 of the elastic member 61 is welded to the front surface 13 of the housing 10 , and the distal end 64 of the elastic member 61 is a vibrating body facing the rear surface 14 of the housing 10 . It is welded to one surface of 50 (back surface of weight 51). As shown in FIG. 5B , the proximal end 63 of the elastic member 62 is welded to the front surface 13 of the housing 10 , and the distal end 64 of the elastic member 62 is connected to the vibrating body facing the rear surface 14 of the housing 10 . It is welded to one surface of 50 (back surface of weight 51).

As a result, the intermediate portion 65 of the elastic member 61 passes between the right side surface portion 15 of the housing 10 and the right side surface of the weight 51 in the left-right direction. Further, the intermediate portion 65 of the elastic member 62 passes between the left side surface portion 16 of the housing 10 and the left side surface of the weight 51 in the left-right direction.

Further, the intermediate portion 65 of the elastic member 61 passes between the regulation portion 22a, which is the lower regulation portion, and the top surface portion 11 in the vertical direction. Further, the intermediate portion 65 of the elastic member 62 passes between the regulation portion 22b, which is the lower regulation portion, and the top surface portion 11 in the vertical direction.

More specifically, the intermediate portion 65 of the elastic member 61 passes between the lower restricting portion 22a and the upper restricting portion 21a. Further, the intermediate portion 65 of the elastic member 62 passes between the lower restricting portion 22b and the upper restricting portion 21b.

Therefore, there is a possibility that the elastic member 61 and the restricting portions 21a and 22a interfere with each other as the weight 51 vibrates. Moreover, there is a possibility that the elastic member 62 and the restricting portions 21b and 22b will interfere with each other as the weight 51 vibrates.

Therefore, the narrowest portion 65a of the intermediate portion 65 of the elastic member 61 is arranged between the restricting portion 21a and the restricting portion 22a. Further, the narrowest portion 65a of the intermediate portion 65 of the elastic member 62 is arranged between the restricting portion 21b and the restricting portion 22b.

By disposing the narrowest portion 65a of the intermediate portion 65 of the elastic member 61 between the restricting portions 21a and 22a, the risk of interference between the elastic member 61 and the restricting portions 21a and 22a is minimized. Further, by disposing the narrowest portion 65a of the intermediate portion 65 of the elastic member 62 between the restricting portions 21b and 22b, the risk of interference between the elastic member 62 and the restricting portions 21b and 22b is minimized.

As shown in FIG. 2, the elastic members 61 and 62 are provided with dampers 66, respectively. The damper 66 is made of rubber and shortens the time required for damping the vibration of the vibrating body 50 (weight 51).

A sheet-like or film-like cover member 71 is attached to the outer surface of the top surface portion 11 . A sheet-like or film-like cover member 72 is attached to the outer surface of the bottom portion 12 . The cover member 71 closes the through hole 23 provided in the top surface portion 11 to prevent dust and foreign matter from entering the housing 10 . The cover member 72 closes the through hole 24 provided in the bottom surface portion 12 to prevent dust and foreign matter from entering the housing 10 .

However, the through hole 23 is a punched hole provided in the process of forming the restricting portions 21 a and 21 b in the top surface portion 11 . The through-holes 24 are punched holes provided in the process of forming the restricting portions 22 a and 22 b in the bottom portion 12 . From another point of view, the through holes 23 and 24 are not essential for the vibration motor 1A. Therefore, if the top surface portion 11 is not provided with the through holes 23, the cover member 71 can be omitted, and if the bottom surface portion 12 is not provided with the through holes 24, the cover member 72 can be omitted. be. By omitting the cover members 71 and 72, the height of the vibration motor 1A can be reduced (thickness can be reduced).

In this embodiment, by arranging the restricting portion at a position closer to the front surface than the center of the housing in the front-rear direction, the connecting portion of the board can be pulled out in various directions including the side of the housing. . In addition, by arranging the thinnest part of the elastic member at a position closer to the base end (the base end is fixed to the front surface of the housing) than the center in the longitudinal direction, it is arranged at the above position. Interference between the restricting portion and the elastic member is avoided.

The present invention is not limited to the above embodiments, and can be modified in various ways without departing from the scope of the invention. For example, if a pair of restricting portions are provided on both sides of the vibrating body in the vibration direction, the vibration of the vibrating body is limited within a predetermined range. For example, if a pair of lower regulating portions are provided on both sides of the vibrating body, the vibration of the vibrating body is restricted within a predetermined range. Further, if one lower regulating portion is provided on one side of the vibrating body and one upper regulating portion is provided on the other side of the vibrating body, the vibration of the vibrating body is limited within a predetermined range. Therefore, some of the restricting portions 21a, 21b, 22a, 22b shown in FIGS. 5A and 5B can be omitted. For example, the restriction portions 21a and 21b as upper restriction portions can be omitted.

5A and 5B may be arranged at positions closer to the back surface portion 14 than the center of the housing 10 in the front-rear direction. In this case, the thinnest portions 65a of the intermediate portions 65 of the elastic members 61 and 62 are located closer to the distal end portion 64 than the center in the longitudinal direction. Further, the space S2 between the restricting portions 22a, 22b and the front portion 13 is enlarged and becomes larger (broader) than the space S1 between the restricting portions 22a, 22b and the back portion 14. FIG. Therefore, the connecting portion 32 of the substrate 30 is pulled out of the housing 10 by using the space S2 between the restricting portion 22a and the front portion 13, for example.

Either one of the elastic members 61 and 62 shown in FIGS. 5A and 5B may be reversed. For example, the elastic member 62 shown in FIG. 5B may be inverted so that the proximal end 63 is fixed to the back surface 14 and the distal end 64 is fixed to the weight 51 . In this case, the restricting portions 21a and 22a shown in FIG. 5A are arranged at the positions shown, while the restricting portions 21b and 22b shown in FIG. It is preferable to place the

1A Vibration motor 10 Housing 11 Top surface 12 Bottom surface 13 Front surface 14 Back surface 15 Right side surface 16 Left side surface 17 Peripheral surface 21a, 21b, 22a , 22b... Regulating part 30... Substrate 31... Main body part 32... Connection part 33... Connection terminal 40... Coil 50... Vibrating body 51... Weight 52... Back yoke 53... Magnet 54... Magnet Accommodating portion 61, 62 Elastic member 63 First fixed portion (base end portion) 64 Second fixed portion (distal end portion) 65 Intermediate portion 65a Most portion 66 Damper

Claims (4)

a housing comprising an opposing top surface portion and a bottom surface portion, an opposing front portion and a rear portion, and an opposing right side portion and a left side portion;
a vibrating body that vibrates in the facing direction of the right side portion and the left side portion inside the housing;
an elastic member that supports the vibrator so that it can vibrate inside the housing;
a substrate on which electrical wiring for supplying power to a coil that generates magnetic flux for vibrating the vibrating body is formed;
a plurality of restricting units provided in the housing for restricting vibration of the vibrating body within a predetermined range;
the plurality of restriction portions include a lower restriction portion provided on the bottom surface portion and protruding toward the top surface portion;
The elastic member includes a first fixing portion provided at one end in the longitudinal direction and fixed to the housing; a second fixing portion provided at the other end in the longitudinal direction and fixed to the vibrating body; an intermediate portion connecting the first fixing portion and the second fixing portion,
the lower restricting portion is arranged at a position closer to the front surface portion or the rear surface portion than the center of the bottom surface portion in a direction in which the front surface portion and the rear surface portion face each other;
the intermediate portion of the elastic member gradually narrows from both outer sides in the longitudinal direction toward the inner side;
The vibration motor, wherein the intermediate portion has a narrowest portion disposed between the lower regulation portion and the top surface portion. the plurality of restriction portions include an upper restriction portion provided on the top surface portion and protruding toward the bottom surface portion;
The lower regulating portion and the upper regulating portion are opposed to each other,
2. The vibration motor according to claim 1, wherein said narrowest part of said intermediate portion is arranged between said lower regulating portion and said upper regulating portion. the lower restricting portion is arranged at a position closer to the front portion than the center of the bottom portion in a direction in which the front portion and the back portion face each other;
3. The vibration motor according to claim 1, wherein a portion of said substrate extends outside said housing through between said lower regulating portion and said rear portion. Having a pair of the elastic members arranged on both sides of the vibrating body,
the first fixing portion of each of the elastic members is fixed to the front portion of the housing;
4. The vibration motor according to any one of claims 1 to 3, wherein the second fixing portion of each of the elastic members is fixed to one surface of the vibrating body facing the back portion of the housing.

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