CN115622355A - Vibration motor - Google Patents

Vibration motor Download PDF

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Publication number
CN115622355A
CN115622355A CN202210829736.4A CN202210829736A CN115622355A CN 115622355 A CN115622355 A CN 115622355A CN 202210829736 A CN202210829736 A CN 202210829736A CN 115622355 A CN115622355 A CN 115622355A
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CN
China
Prior art keywords
surface portion
regulating
vibrator
vibration motor
case
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210829736.4A
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Chinese (zh)
Inventor
森然自
南泽武士
吴虹兵
黄辉安
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Nidec Precision Corp
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Nidec Copal Corp
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Publication date
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Publication of CN115622355A publication Critical patent/CN115622355A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/18—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with coil systems moving upon intermittent or reversed energisation thereof by interaction with a fixed field system, e.g. permanent magnets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
    • F16F15/08—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with rubber springs ; with springs made of rubber and metal
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/02—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

The invention provides a vibration motor. The degree of freedom of the substrate with respect to the extraction direction of the case is improved. A vibration motor (1A) is provided with: a case (10) having a top surface section (11), a bottom surface section (12), a front surface section (13), and a back surface section (14); a vibrator (50) that vibrates within the case; an elastic member (61) that supports the vibrator in the case so as to be capable of vibrating; a substrate (30) on which electrical wiring for supplying power to a coil that generates magnetic flux for vibrating a vibrator is formed; and a limiting section (21 a, 22 a) provided in the case and limiting the vibration of the vibrating body within a predetermined range. The regulating portion is disposed closer to the front surface portion than a center of the case in a facing direction of the front surface portion and the rear surface portion. The thinnest portion (65 a) of the elastic member is disposed between the opposing regulating portion (21 a) and regulating portion (22 a).

Description

Vibration motor
Technical Field
The present invention relates to a vibration motor.
Background
Nowadays, a vibration motor is built in various electronic devices such as a smart phone and a tablet terminal. Patent document 1 describes an example of a vibration motor incorporated in an electronic device. The vibration motor described in patent document 1 is a linear vibration motor in which a vibrating body linearly vibrates. The vibrator of the vibration motor described in patent document 1 is housed in a case. In the case, a coil, a substrate, and the like are housed in addition to the vibrator. An electric wiring for supplying electric power to the coil is provided on the substrate. A part of the substrate is disposed inside the case, and the other part of the substrate is drawn out of the case.
Patent document 1: japanese patent laid-open publication No. 2019-176688
In order to increase the degree of freedom in the layout of the vibration motor, it is preferable to increase the degree of freedom in the drawing direction of the substrate with respect to the housing.
Disclosure of Invention
One embodiment of the present invention is a vibration motor including: a housing having top and bottom surfaces facing each other, front and back surfaces facing each other, and right and left side surfaces facing each other; a vibrating body that vibrates in the housing in a direction in which the right side surface portion and the left side surface portion face each other; an elastic member that supports the vibrator inside the case so that the vibrator can vibrate; a substrate on which an electric wiring for supplying power to a coil that generates a magnetic flux for vibrating the vibrator is formed; and a plurality of restricting portions provided in the case and restricting the vibration of the vibrator within a predetermined range. The plurality of regulating portions include a lower regulating portion that is provided on the bottom surface portion and protrudes toward the top surface portion. The elastic member has: a 1 st fixing portion provided at one end side in a longitudinal direction and fixed to the housing; a 2 nd fixing portion provided on the other end side in the longitudinal direction and fixed to the vibrating body; and an intermediate portion connecting the 1 st fixing portion and the 2 nd fixing portion. The lower regulating portion is disposed closer to the front surface portion or the rear surface portion than a center of the bottom surface portion in a facing direction of the front surface portion and the rear surface portion. The intermediate portion of the elastic member is tapered 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 limiting portion and the top surface portion.
According to the present invention, a vibration motor in which the degree of freedom of the substrate in the direction of drawing out the substrate from the housing is improved is realized.
Drawings
Fig. 1 is a perspective view showing an external appearance of a vibration motor.
Fig. 2 is an exploded perspective view illustrating the configuration of the vibration motor.
Fig. 3 is an exploded perspective view showing the configuration of the housing.
Fig. 4 is an explanatory diagram showing positions of the regulating portion on the top surface portion and the regulating portion on the bottom surface portion.
Fig. 5A isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A in fig. 1.
Fig. 5B is a sectional view taken along line B-B in fig. 1.
Fig. 6 is a perspective view of the elastic member.
Description of the reference symbols
1A: a vibration motor; 10: a housing; 11: a top surface portion; 12: a bottom surface portion; 13: a front surface portion; 14: a back portion; 15: a right side face; 16: a left side face; 17: a peripheral face portion; 21a, 21b, 22a, 22b: a restricting section; 30: a substrate; 31: a main body portion; 32: a connecting portion; 33: a connection terminal; 40: a coil; 50: a vibrating body; 51: balancing weight; 52: a back yoke; 53: a magnet; 54: a magnet housing section; 61. 62: an elastic member; 63: a 1 st fixed part (proximal end part); 64: a 2 nd fixing part (front end part); 65: an intermediate portion; 65a: the most detailed part; 66: a shock absorber.
Detailed Description
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 or substantially the same components and elements are denoted by the same reference numerals, and the description thereof will not be repeated in principle.
< brief summary of vibration Motor >
Fig. 1 is a perspective view showing an external appearance of a vibration motor 1A of the present embodiment. Fig. 2 is an exploded perspective view illustrating the configuration of the vibration motor 1A. Fig. 3 is an exploded perspective view of the housing 10 constituting the vibration motor 1A.
The housing 10 is a box having a substantially rectangular planar shape, and forms the outer contour of the vibration motor 1A. The components of the vibration motor 1A, such as the substrate 30, the coil 40, and the vibrator 50, are housed in the case 10. A vibrator 50, which is one of the components of the vibration motor 1A, vibrates inside the casing 10 in the longitudinal direction (longitudinal direction) of the casing 10. In other words, the vibrator 50 generates vibration in the longitudinal direction of the case 10. That is, the vibration motor 1A is a linear vibration motor that generates vibration in the longitudinal direction of the casing 10.
In the following description, the longitudinal direction of the casing 10 is sometimes referred to as the "left-right direction", and the short-side direction of the casing 10 is sometimes referred to as the "front-rear direction". In addition, a direction perpendicular to both the left-right direction and the front-rear direction may be referred to as an "up-down direction". When such a designation is used, the vibrator 50 vibrates in the left-right direction.
< housing >
The casing 10 includes 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 surface portion 15 and a left side surface portion 16 facing each other in the left-right direction. That is, the vibrator 50 that vibrates in the longitudinal direction (left-right direction) of the casing 10 vibrates in the facing direction of the right side surface 15 and the left side surface 16.
In the following description, the front surface portion 13, the back surface portion 14, the right side surface portion 15, and the left side surface portion 16 may be collectively referred to as "peripheral surface portion 17".
The case 10 is formed of a metal plate (e.g., a stainless steel plate). However, the top surface portion 11, the bottom surface portion 12, and the peripheral surface portion 17 are formed of different metal plates. That is, the case 10 is formed of a plurality of metal plates integrated.
The peripheral surface portion 17 is formed in a square tube shape by a band-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 located on the back surface portion 14. More specifically, both ends of the metal plate forming the peripheral surface portion 17 are located at the center in the longitudinal direction (center in the vibration direction) of the back surface portion 14. By disposing both ends of the metal plates fixed to each other on the back surface portion 14, the shock resistance of the vibration motor 1A can be improved. Specifically, when a force in the front-rear direction is applied to the vibration motor 1A due to dropping or the like, the vibrator 50 is less likely to contact 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, for example, pressure welding.
The top surface portion 11 and the bottom surface portion 12 are each formed of a flat metal plate punched out into a substantially rectangular shape. The top surface portion 11 closes an opening portion on one end side of the peripheral surface portion 17, and the bottom surface portion 12 closes an opening portion on the other end side of the peripheral surface portion 17. The peripheral edge of the metal plate forming the top surface portion 11 is welded to one end of the metal plate forming the peripheral surface portion 17. 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 regulating portions 21a and 21b are provided on the left and right of the top surface portion 11. A pair of regulating portions 22a and 22b are provided on the left and right sides of the bottom surface portion 12. In other words, the restricting portions 21a and 21b are provided on the short sides of the top surface portion 11 facing each other. The opposing short sides of the bottom surface portion 12 are provided with restricting portions 22a and 22b, respectively.
That is, 4 restricting portions 21a, 21b, 22a, 22b are provided in the housing 10. These restricting portions 21a, 21b, 22a, and 22b are positioned around the vibrator 50, and restrict the vibration of the vibrator 50 within a predetermined range. In other words, the vibrator 50 can vibrate between the limiting portions 21a and 22a and the limiting portions 21b and 22b facing each other in the vibration direction. However, in the normal vibration state, the vibrator 50 does not contact the restrictions 21a, 21b, 22a, and 22b. When the vibrator 50 vibrates (displaces) more largely than usual for some reason, the vibrator 50 contacts at least one of the regulating portions 21a, 21b, 22a, and 22b. As a result, the vibrator 50 can be prevented from vibrating excessively.
< configuration of restricting part >
Fig. 4 is an explanatory diagram showing the positions of the regulating portions 21a, 21b on the top surface portion 11 and the positions of the regulating portions 22a, 22b on the bottom surface portion 12.
The regulating portions 21a and 21b provided in the top surface portion 11 are convex portions formed at predetermined positions of the top surface portion 11 by press working, and protrude downward. In other words, the regulating portions 21a and 21b provided on the top surface portion 11 are upper regulating portions that protrude toward the bottom surface portion 12.
The regulating portions 22a and 22b provided on the bottom surface portion 12 are convex portions formed at predetermined positions of the bottom surface portion 12 by press working, and protrude upward. In other words, the regulating portions 22a and 22b provided on the bottom surface portion 12 are lower regulating portions projecting toward the top surface portion 11.
The regulating portions 21a and 21b provided in the top surface portion 11 face each other in the left-right direction (longitudinal direction of the top surface portion 11). Similarly, the regulating portions 22a and 22b provided on the bottom surface portion 12 face each other in the left-right direction (longitudinal direction of the bottom surface portion 12).
The restricting portions 21a and 21b are disposed at positions offset from the center of the top surface portion 11 in the front-rear direction. More specifically, the restricting portions 21a and 21b are disposed forward of the center of the top portion 11 in the front-rear direction. As a result, the straight line L1 connecting the centers of the 2 regulating portions 21a, 21b is positioned forward of the straight line (center line) L2 that divides the top surface portion 11 into two in the front-rear direction.
Similarly, the regulating portions 22a and 22b provided on the bottom portion 12 are disposed at positions shifted from the center of the bottom portion 12 in the front-rear direction. More specifically, the restricting portions 22a and 22b are disposed forward of the center of the bottom surface portion 12 in the front-rear direction. As a result, the straight line L1 connecting the centers of the 2 restricting portions 22a, 22b is positioned forward of the straight line (center line) L2 that divides the bottom surface portion 12 into two 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 11 shown in fig. 2 can be the bottom surface 12 by merely turning it upside down. The bottom surface portion 12 shown in fig. 2 can be the top surface portion 11 by simply turning it upside down.
Fig. 5A isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A in fig. 1. Fig. 5B is a sectional view taken along line B-B in fig. 1.
As shown in fig. 5A, the regulating portion 21a provided on the top surface portion 11 and the regulating portion 22a provided on the bottom surface portion 12 face each other in the vertical direction. As shown in fig. 5B, the regulating portion 21B provided on the top surface portion 11 and the regulating portion 22B provided on the bottom surface portion 12 face each other in the vertical direction.
As described above, the regulating portion 21a shown in fig. 5A is located forward of the center of the top surface portion 11 in the front-rear direction. The restricting portion 22a is located forward of the center of the bottom surface portion 12 in the front-rear direction. In other words, the restricting portion 21a is disposed closer to the front surface portion 13 than the center of the top surface portion 11 in the facing direction between the front surface portion 13 and the back surface portion 14. The restricting portion 22a is disposed closer to the front surface portion 13 than the center of the bottom surface portion 12 in the facing direction of the front surface portion 13 and the back surface portion 14.
As a result, the distance D1 between the regulating portions 21a, 22a and the back surface portion 14 is longer (wider) than the distance D2 between the regulating portions 21a, 22a and the front surface portion 13. In other words, space S1 between regulating portions 21a, 22a and back surface portion 14 is larger (wider) than space S2 between regulating portions 21a, 22a and front surface portion 13.
As described above, the regulating portion 21B shown in fig. 5B is located forward of the center of the top surface portion 11 in the front-rear direction. The restriction portion 22b is located forward of the center of the bottom surface portion 12 in the front-rear direction. As a result, the distance D1 between the restricting portions 21b, 22b and the back surface portion 14 is longer (wider) than the distance D2 between the restricting portions 21b, 22b and the front surface portion 13. In other words, space S1 between regulating portions 21b and 22b and back surface portion 14 is larger (wider) than space S2 between regulating portions 21b and 22b and front surface portion 13.
< substrate >
The substrate 30 shown in fig. 2 is a flexible substrate on which electric wiring for supplying power to the coil 40 shown in fig. 2 is formed. The substrate 30 is disposed on the bottom surface portion 12 of the case 10. Most of the substrate 30 is disposed inside the housing 10, and a part of the substrate 30 is drawn out of the housing 10. In the following description, most of the substrate 30 disposed inside the casing 10 may be referred to as a "main body portion 31", and a part of the substrate 30 drawn out of the casing 10 may be referred to as a "connection portion 32".
The connection portion 32 is provided with a connection terminal 33 electrically connected to an input end of an electric wiring formed on the body portion 31. The connecting portion 32 extends across one short side of the housing 10 to the right side of the housing 10. Specifically, the connecting portion 32 is led out to the right side of the housing 10 through between the bottom surface portion 12 and the right side surface portion 15.
Referring to fig. 5A, connection portion 32 of substrate 30 passes through space S1 between regulating portion 22a and rear surface portion 14. That is, space S1 between regulating portion 22a and rear surface portion 14 is used as a passage for drawing connection portion 32 of substrate 30 to the outside of case 10.
In other words, by making space S1 between regulating portion 22a and rear surface portion 14 larger (wider) than space S2 between regulating portion 22a and front surface portion 13, connecting portion 32 can be drawn out from the short side of case 10 to the outside of case 10.
In addition, a space S1 between the restricting portion 22B and the back surface portion 14 shown in fig. 5B is also larger (wider) than a space S2 between the restricting portion 22B and the front surface portion 13. Therefore, space S1 between regulating portion 22b and rear surface portion 14 can also be used as a passage for drawing connection portion 32 of substrate 30 to the outside of case 10.
Also, the case 10 is not provided with 1 regulating portion on the long side. That is, there is no member or the like that hinders the extraction of the connection portion 32 on the long side of the case 10.
Therefore, the connection portion 32 of the substrate 30 can be drawn out in any direction of the front, rear, right side, and left side of the housing 10. For example, the drawing direction of the connection portion 32 can be selected according to the positional relationship between the housing 10 and the power supply circuit. In other words, the possibility that the layout (position and orientation) of the vibration motor 1A within the electronic apparatus is limited due to the drawing direction of the connection portion 32 is reduced.
< coil >
The coil 40 shown in fig. 2 is a coreless coil (air core coil). More specifically, the coil 40 is formed of a conductive wire wound around an imaginary axis extending in the up-down direction. The coil 40 is connected to an output terminal of an electric wiring formed on the main 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 to generate a magnetic flux.
< vibration body >
The vibrator 50 shown in fig. 2 includes a weight 51, a back yoke 52, and a magnet 53. The weight 51 is a mass of a metal alloy, such as a tungsten alloy. At the center of the weight 51, 2 magnet housing portions 54 penetrating the weight 51 in the vertical direction are formed.
Each magnet housing portion 54 houses a magnet 53. Each magnet 53 is a permanent magnet having a prism shape extending in the front-rear direction. Each magnet 53 is disposed in the magnet housing 54 in an orientation in which the longitudinal direction is perpendicular to the longitudinal direction of the counterweight 51.
When a voltage is applied to the coil 40, the vibrator 50 including the magnet 53 vibrates in the left-right direction due to the interaction between the magnetic flux generated by the coil 40 and the magnetic flux generated by the magnet 53.
The back yoke 52 is overlapped on the weight 51 to close the magnet housing 54. In other words, the back yoke 52 covers the magnet 53 accommodated in the magnet accommodating portion 54. The back yoke 52 and the magnet 53 form a magnetic circuit, and the power of the vibration motor 1A is increased.
< elastic component >
The 2 elastic members 61 and 62 shown in fig. 2 are leaf springs extending in the front-rear direction. A 1 st fixing portion 63 fixed to the case 10 is provided on one end side (base end side) in the longitudinal direction of the elastic members 61, 62, and a 2 nd fixing portion 64 fixed to the vibrator 50 (weight 51) is provided on the other end side (tip end side) in the longitudinal direction of the elastic members 61, 62.
In the following description, the 1 st fixing portion 63 of the elastic members 61 and 62 may be referred to as a "base end portion 63", and the 2 nd fixing portion 64 of the elastic members 61 and 62 may be referred to as a "tip end portion 64".
Fig. 6 is a perspective view of the elastic members 61, 62. As shown in fig. 6, the proximal end portions 63 and the distal end portions 64 of the elastic members 61 and 62 are connected via an intermediate portion 65. The base end portion 63 and the tip end portion 64 are bent at a right angle or substantially a right angle with respect to the intermediate portion 65. As a result, the elastic members 61 and 62 have a substantially rectangular planar shape of "12467.
The weight 51 shown in fig. 2 is disposed between the opposing elastic members 61 and 62, and is supported by these elastic members 61 and 62 so as to be able to vibrate. In other words, the elastic members 61 and 62 are support members that support the weight 51 so as to be able to vibrate.
Reference is again made to fig. 6. The intermediate portion 65 of each elastic member 61, 62 is tapered from both outer sides toward the inner side in the longitudinal direction. In other words, the vertical dimension of the intermediate portion 65 gradually decreases from both outer sides toward the inner side in the longitudinal direction. The intermediate portion 65 is the thinnest at the portion closer to the base end portion 63 than the longitudinal direction center. In other words, the thinnest portion 65a of the intermediate portion 65 is disposed closer to the base end portion 63 than the longitudinal direction center of the elastic members 61, 62. In fig. 6, the thinnest portion 65a is hatched (dot pattern) to emphasize the thinnest portion 65a.
As shown in fig. 5A, a base end portion 63 of the elastic member 61 is welded to the front surface portion 13 of the case 10, and a tip end portion 64 of the elastic member 61 is welded to one surface (the back surface of the weight 51) of the vibrator 50 facing the back surface portion 14 of the case 10. As shown in fig. 5B, a base end portion 63 of the elastic member 62 is welded to the front surface portion 13 of the case 10, and a tip end portion 64 of the elastic member 62 is welded to one surface (the back surface of the weight 51) of the vibrator 50 facing the back surface portion 14 of the case 10.
As a result, the intermediate portion 65 of the elastic member 61 passes between the right side surface portion 15 of the case 10 and the right side surface of the counterweight 51 in the left-right direction. In addition, the intermediate portion 65 of the elastic member 62 passes between the left side surface portion 16 of the case 10 and the left side surface of the counterweight 51 in the left-right direction.
The intermediate portion 65 of the elastic member 61 passes between the regulating portion 22a as a lower regulating portion and the top surface portion 11 in the vertical direction. The intermediate portion 65 of the elastic member 62 passes between the regulating portion 22b as a lower regulating 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 regulating portion 22a as the lower regulating portion and the regulating portion 21a as the upper regulating portion. The intermediate portion 65 of the elastic member 62 passes between the regulating portion 22b as the lower regulating portion and the regulating portion 21b as the upper regulating portion.
Therefore, the elastic member 61 may interfere with the restricting portions 21a and 22a in accordance with the vibration of the weight 51. Further, the elastic member 62 may interfere with the restricting portions 21b and 22b in accordance with the vibration of the weight 51.
Therefore, the thinnest portion 65a of the intermediate portion 65 of the elastic member 61 is disposed between the regulating portion 21a and the regulating portion 22 a. Further, the thinnest portion 65a of the intermediate portion 65 of the elastic member 62 is disposed between the regulating portion 21b and the regulating portion 22b.
By disposing the thinnest portion 65a of the intermediate portion 65 of the elastic member 61 between the regulating portion 21a and the regulating portion 22a, the possibility of interference between the elastic member 61 and the regulating portions 21a, 22a is minimized. Further, by disposing the thinnest portion 65a of the intermediate portion 65 of the elastic member 62 between the regulating portion 21b and the regulating portion 22b, the possibility of interference between the elastic member 62 and the regulating portions 21b, 22b is minimized.
As shown in fig. 2, dampers 66 are provided to the elastic members 61 and 62, respectively. The damper 66 is formed of rubber, and shortens the time required for damping the vibration of the vibrator 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 surface portion 12.
The cover member 71 closes the through hole 23 provided in the top surface portion 11, and prevents 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, and prevents dust and foreign matter from entering the housing 10.
The through hole 23 is a punched hole provided in the top surface portion 11 in the process of forming the regulating portions 21a and 21b. The through hole 24 is a punched hole provided in the bottom surface portion 12 in the process of forming the regulating portions 22a and 22b. In other words, the through holes 23, 24 are not essential for the vibration motor 1A. Therefore, the cover member 71 can be omitted when the through-hole 23 is not provided in the top surface portion 11, and the cover member 72 can be omitted when the through-hole 24 is not provided in the bottom surface portion 12. By omitting the cover members 71, 72, the height of the vibration motor 1A can be reduced (the thickness can be made thinner).
In the present embodiment, the connection portion of the substrate can be led out in various directions including the side of the housing by disposing the restriction portion at a position closer to the front surface portion than the center in the front-rear direction of the housing. Further, by disposing the thinnest portion of the elastic member at a position closer to the base end portion than the longitudinal direction center (the base end portion is fixed to the front surface portion of the housing), interference between the restriction portion disposed at the above position and the elastic member is avoided.
The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention. For example, if a pair of restricting portions is provided on both sides of the vibrating body in the vibrating direction, the vibration of the vibrating body is restricted within a predetermined range. For example, if a pair of lower restricting portions is provided on both sides of the vibrator, the vibration of the vibrator is restricted within a predetermined range. Further, if 1 lower limiting portion is provided on one side of the vibrator and 1 upper limiting portion is provided on the other side of the vibrator, the vibration of the vibrator is limited within a predetermined range. Therefore, several of the restricting portions 21a, 21B, 22a, and 22B shown in fig. 5A and 5B can be omitted. For example, the restricting portions 21a and 21b as the upper restricting portions can be omitted.
The restricting portions 21a, 21B, 22a, and 22B shown in fig. 5A and 5B may be disposed closer to the rear surface portion 14 than the center in the front-rear direction of the housing 10. In this case, the thinnest portion 65a of the intermediate portion 65 of the elastic members 61 and 62 is disposed closer to the distal end portion 64 than the longitudinal center. The space S2 between the restricting portions 22a and 22b and the front surface portion 13 is enlarged and larger (wider) than the space S1 between the restricting portions 22a and 22b and the rear surface portion 14. Therefore, the connection portion 32 of the substrate 30 is drawn out to the outside of the housing 10 by the space S2 between the regulating portion 22a and the front surface portion 13, for example.
Either one of the elastic members 61 and 62 shown in fig. 5A and 5B may be reversed. For example, elastic member 62 shown in fig. 5B may be inverted to fix base end portion 63 to rear surface portion 14 and fix tip end portion 64 to counterweight 51. In this case, it is preferable that the restricting portions 21a and 22a shown in fig. 5A are disposed at the illustrated positions, and the restricting portions 21B and 22B shown in fig. 5B are disposed closer to the rear surface portion 14 than the center in the front-rear direction.

Claims (4)

1. A vibration motor having:
a housing having opposing top and bottom sections, opposing front and back sections, and opposing right and left side sections;
a vibrator that vibrates in the housing in a direction in which the right side surface portion and the left side surface portion face each other;
an elastic member that supports the vibrator inside the case so that the vibrator can vibrate;
a substrate on which an electric wiring for supplying power to a coil that generates a magnetic flux for vibrating the vibrator is formed; and
a plurality of regulating portions provided in the case and regulating vibration of the vibrator within a predetermined range,
the plurality of regulating portions include a lower regulating portion provided on the bottom surface portion and protruding toward the top surface portion,
the elastic member has:
a 1 st fixing portion provided at one end side in a longitudinal direction and fixed to the housing;
a 2 nd fixing portion provided on the other end side in the longitudinal direction and fixed to the vibrating body; and
an intermediate portion connecting the 1 st fixing portion and the 2 nd fixing portion,
the lower regulating portion is disposed at a position closer to the front surface portion or the rear surface portion than a center of the bottom surface portion in a facing direction of the front surface portion and the rear surface portion,
the intermediate portion of the elastic member is tapered from both outer sides toward the inner side in the longitudinal direction,
the thinnest portion of the intermediate portion is disposed between the lower limiting portion and the top surface portion.
2. The vibration motor according to claim 1,
the plurality of regulating parts include an upper regulating part provided on the top surface part and protruding toward the bottom surface part,
the lower limiting part and the upper limiting part are opposite to each other,
the narrowest portion of the intermediate portion is disposed between the lower limiting portion and the upper limiting portion.
3. The vibration motor according to claim 1 or 2,
the lower regulating portion is disposed closer to the front surface portion than a center of the bottom surface portion in a facing direction of the front surface portion and the back surface portion,
a part of the substrate extends to the outside of the case through between the lower limiting portion and the rear surface portion.
4. The vibration motor according to claim 1 or 2,
the vibration motor has a pair of elastic members disposed on both sides of the vibrator,
the 1 st fixing portion of each of the elastic members is fixed to the front surface portion of the housing,
the 2 nd fixing portion of each elastic member is fixed to one surface of the vibrator facing the rear surface portion of the case.
CN202210829736.4A 2021-07-16 2022-07-15 Vibration motor Pending CN115622355A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021117584A JP2023013420A (en) 2021-07-16 2021-07-16 vibration motor
JP2021-117584 2021-07-16

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Publication Number Publication Date
CN115622355A true CN115622355A (en) 2023-01-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210829736.4A Pending CN115622355A (en) 2021-07-16 2022-07-15 Vibration motor

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CN (1) CN115622355A (en)

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