WO2006109350A1 - Masse excentrique, moteur a vibration et appareil portatif - Google Patents

Masse excentrique, moteur a vibration et appareil portatif Download PDF

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Publication number
WO2006109350A1
WO2006109350A1 PCT/JP2005/006659 JP2005006659W WO2006109350A1 WO 2006109350 A1 WO2006109350 A1 WO 2006109350A1 JP 2005006659 W JP2005006659 W JP 2005006659W WO 2006109350 A1 WO2006109350 A1 WO 2006109350A1
Authority
WO
WIPO (PCT)
Prior art keywords
weight
eccentric
motor shaft
eccentric weight
holding portion
Prior art date
Application number
PCT/JP2005/006659
Other languages
English (en)
Japanese (ja)
Inventor
Kenichi Shimodaira
Takaomi Tanaka
Yoshito Hirata
Hidehiko Ichikawa
Akira Shimojima
Hikaru Yoshizawa
Kenichi Kusano
Original Assignee
Nanshin Co., Ltd.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nanshin Co., Ltd. filed Critical Nanshin Co., Ltd.
Priority to PCT/JP2005/006659 priority Critical patent/WO2006109350A1/fr
Priority to PCT/JP2005/024039 priority patent/WO2006109365A1/fr
Publication of WO2006109350A1 publication Critical patent/WO2006109350A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
    • H02K7/061—Means for converting reciprocating motion into rotary motion or vice versa using rotary unbalanced masses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/10—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy
    • B06B1/16—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy operating with systems involving rotary unbalanced masses

Definitions

  • the present invention relates to an eccentric weight, a vibration motor, and a portable device.
  • FIG. 15 is a diagram for explaining a conventional vibration motor and an eccentric weight.
  • Fig. 15 (a) is a perspective view of the vibration motor
  • Fig. 15 (b) is a cross-sectional view of the eccentric weight cut along a plane perpendicular to the motor axis
  • Fig. 15 (c) is an eccentric weight along the motor axis.
  • a conventional vibration motor 1100 includes a small cylindrical motor body 1110 and an eccentric weight 1120 made of a sintered body of tungsten or the like and having a substantially fan shape.
  • the motor shaft 1112 force S of the motor body 1110 is held in the motor shaft holding hole 1122 of the eccentric weight 1120.
  • Eccentric weight 1120 is attached to the tip of motor shaft 1112 by tightening by deforming motor shaft holding hole 1122 by applying external force from the thin side surface of motor shaft holding hole 1 122 through which motor shaft 1112 passes. (For example, see Patent Document 1).
  • FIG. 16 is a diagram for explaining another conventional eccentric weight.
  • Fig. 16 (a) is a front view of the eccentric weight
  • Fig. 16 (b) is a cross-sectional view taken along the line A_A in Fig. 16 (a)
  • Fig. 16 (c) is a front view of the component
  • Fig. 16 (d ) Is a cross-sectional view taken along line BB in FIG. 16 (c).
  • a part of the motor body 1210 is also shown.
  • another conventional eccentric weight 1220 has a motor shaft holding hole 1232 for holding the motor shaft 1212 of the motor body 1210, and has a cylindrical portion made of a low specific gravity metal. It consists of a copper support 1230 and a substantially half-pipe weight 1240 made of a high specific gravity metal (see, for example, Patent Document 1). For this reason, since the weight 1240 is made of a high specific gravity metal, the center of gravity of the eccentric weight 1220 is arranged at a position separated from the center axis of the motor shaft holding hole 1232. As a result, the amount of eccentricity in the eccentric weight 1220 increases, and by using such other conventional eccentric weight 1220, a vibration motor that can obtain a necessary vibration amount with light weight and low power consumption can be configured.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2001-129479
  • the weight 1240 is integrally bonded and fixed to a part of the outer surface 1234 of the weight support 1230 via the brazing portion 1250. Therefore, when the vibration motor (and the eccentric weight) is used for a long time, there is a problem that the reliability of the connection between the weight and the weight support is lowered.
  • An object of the present invention is to provide an eccentric weight which is a weight and in which the reliability of bonding between the weight and the weight support is suppressed even when such a vibration motor is used for a long time.
  • Another object of the present invention is to provide a vibration motor and a portable device having such an excellent eccentric weight.
  • the eccentric weight of the present invention includes a weight made of a high specific gravity metal, a weight holding portion for holding the weight, and a motor shaft holding portion for holding the motor shaft.
  • An eccentric weight manufactured by integrating a weight support made of an elastic body made of a metal having a specific gravity lower than that of a high specific gravity metal, wherein the weight holding portion includes the weight and the weight support. And a weight side protruding portion that reduces the amount of protrusion to the weight side when integrated.
  • the eccentric weight includes a weight made of a high specific gravity metal, and a weight support made of a metal having a specific gravity lower than that of the high specific gravity metal constituting the weight.
  • the weight support is a weight support made of an elastic body, the weight is held by the weight holding portion by the elastic force of the entire weight holding portion. It will be. For this reason, when the vibration motor (and eccentric weight) is used for a long time, the reliability of the connection between the weight and the weight support is suppressed, and by using such an eccentric weight, long-term reliability is ensured.
  • a high vibration motor can be configured.
  • the weight holding portion has a weight side protrusion that reduces the amount of protrusion to the weight side when the weight and the weight support are integrated. Since the weight holding portion is used, the weight is held by the weight holding portion with a stronger elastic force to which the elastic force of the weight side protruding portion is added. For this reason, when the vibration motor (and the eccentric weight) is used for a long time, the reliability of the connection between the weight and the weight support is further suppressed, so by using such an eccentric weight, It is possible to construct a vibration motor with higher long-term reliability.
  • the weight support body is a weight support body made of an elastic body
  • the motor shaft is held by the motor shaft holding portion by elastic force. .
  • the vibration motor is used for a long time, it is suppressed that the reliability of the connection between the motor shaft and the weight support is lowered, and a vibration motor with high long-term reliability can be configured.
  • the size of the inner peripheral portion of the weight holding portion before integrating the weight and the weight support is smaller than the size of the outer peripheral portion of the weight. Is preferable.
  • the weight is inserted into the weight holding portion in a state where the inner peripheral portion is expanded, whereby the weight is held by the weight holding portion by the elastic force of the entire weight holding portion.
  • the inner diameter of the motor shaft holding portion is smaller than the outer diameter of the motor shaft.
  • the weight side protruding portion has a small amount of protrusion to the weight side as the weight is inserted into the weight holding portion. It is preferable to have such a structure.
  • the motor shaft holding portion protrudes toward the motor shaft when the motor shaft is inserted into the motor shaft holding portion. It is preferable to have a motor shaft side protrusion that reduces the amount.
  • the motor shaft is held by the motor shaft holding portion with a stronger elastic force to which the elastic force of the motor shaft side protruding portion is added. For this reason, when the vibration motor is used for a long time, it is possible to suppress a decrease in the reliability of the connection between the motor shaft and the weight support, and thus a vibration motor with high long-term reliability can be configured.
  • the eccentric weight of the present invention includes a weight made of a high specific gravity metal, a weight holding portion for holding the weight, and a motor shaft holding portion for holding the motor shaft. Integrates a weight support made of an elastic body of a metal with a specific gravity lower than that of the high specific gravity metal
  • the weight support body has a structure in which the weight holding portion holds the weight with a stronger elastic force when the motor shaft is inserted into the motor shaft holding portion. It is characterized by having.
  • the eccentric weight includes a weight made of a high specific gravity metal, and a weight support made of a metal having a specific gravity lower than that of the high specific gravity metal constituting the weight. Since the eccentric weight is manufactured by integrating the two, the total weight of the eccentric weight can be reduced and the amount of eccentricity in the eccentric weight can be increased. Therefore, by using such an eccentric weight, it is possible to configure a vibration motor that can obtain a necessary vibration amount with light weight and low power consumption.
  • the weight support is a weight support made of an elastic body, the weight is held by the weight holding portion by an elastic force. For this reason, when the vibration motor (and the eccentric weight) is used for a long time, it is possible to suppress a decrease in the reliability of the connection between the weight and the weight support, and by using such an eccentric weight, long-term reliability can be improved.
  • a high and vibration motor can be configured.
  • the weight holding portion holds the weight with a stronger elastic force. Since the weight support body has a simple structure, the weight is held by the weight holding portion with a stronger elastic force when the motor shaft is inserted into the motor shaft holding portion. For this reason, when the vibration motor (and the eccentric weight) is used for a long time, the reliability of the connection between the weight and the weight support is further suppressed, so by using such an eccentric weight, A vibration motor with higher long-term reliability can be configured.
  • the eccentric weight of the present invention includes a weight made of a high specific gravity metal, a weight holding portion for holding the weight, and a motor shaft holding portion for holding the motor shaft, An eccentric weight manufactured by integrating a weight support made of an elastic body made of a metal having a specific gravity lower than that of a high specific gravity metal, wherein the weight support includes the weight and the weight support.
  • the motor shaft holding part has a structure that allows the space defined by the motor shaft holding part to be reduced.
  • the eccentric weight is made of a high specific gravity metal.
  • the weight support body is a weight support body made of an elastic body, the weight is held by the weight holding portion by elastic force. For this reason, when the vibration motor (and the eccentric weight) is used for a long time, it is possible to suppress a decrease in the reliability of the connection between the weight and the weight support, and by using such an eccentric weight, long-term reliability can be improved.
  • a high and vibration motor can be configured.
  • the eccentric weight described in the above (6) when the weight support is integrated with the weight and the weight support, a structure in which the space defined by the motor shaft holding portion is reduced. Since the weight support is provided, the motor shaft is held by the motor shaft holding portion with a stronger elastic force when the weight and the weight support are integrated. For this reason, when the vibration motor is used for a long period of time, it is further suppressed that the reliability of the connection between the motor shaft and the weight support is reduced, so that a vibration motor with higher long-term reliability can be configured. .
  • the weight support is subjected to a hardening treatment after plastic deformation of the thin metal member into a predetermined shape. It is preferably made of an elastic body manufactured by
  • the amount of the material constituting the weight support can be made extremely small while maintaining the required strength.
  • the total weight of the eccentric weight can be reduced and the amount of eccentricity in the eccentric weight can be further increased. For this reason, by using such an eccentric weight, it is possible to configure a vibration motor that can obtain a necessary vibration amount with lighter and less power consumption.
  • the eccentric weight described in (7) above has a picker hardness (Hv) of 150 or more.
  • the weight support body can hold the weight with a strong elastic force and can hold the motor shaft with a strong elastic force.
  • the Vickers hardness (Hv) of the weight support is more preferably 200 or more, and further preferably 250 or more.
  • the thin metal member is made of a metal having quench hardening properties.
  • a weight support can be easily manufactured by performing a quenching process after plastically deforming a thin metal member into a predetermined shape.
  • the quench-hardening metal is preferably martensitic stainless steel.
  • a material constituting a weight for example, tungsten, tungsten alloy, etc.
  • the eccentric weight as a whole has a high corrosion resistance and is difficult to crack (for example, nickel. ).
  • the joint between the eccentric weight and the plating film and the plating film itself are easily cracked. It tends to occur. For this reason, there was a problem that the reliability related to the holding of the motor shaft in the motor shaft holding portion was reduced.
  • martensitic stainless steel is originally a material that has high corrosion resistance and is difficult to crack, so it is not necessary to apply a plating. For this reason, the joint portion between the eccentric weight and the plating film and the plating itself are not cracked, and the reduction in the reliability of the motor shaft holding portion regarding the holding of the motor shaft is suppressed.
  • manure sugar beet type stainless steel maoka it is possible to display SUS403, SUS410, SUS416, S US420, SUS429, SUS431, SUS440 and the like.
  • the quenching process gives a value of about 300-600 as the Vickers hardness ( ⁇ ).
  • the thin metal member is preferably made of a metal having age hardening.
  • a weight support can be easily manufactured by subjecting a thin metal member to plastic deformation after being plastically deformed into a predetermined shape, followed by precipitation hardening.
  • the age-hardening metal is precipitation hardened stainless steel, beryllium copper alloy, nickel manganese copper alloy or precipitation hardened titanium alloy. Is preferred.
  • the age-hardening metal is a precipitation hardening stainless steel
  • substantially the same effect as in the case of the martensitic stainless steel described in (9) above is obtained, and the martensitic stainless steel is obtained.
  • the effect that it is excellent in corrosion resistance than the case of steel is acquired.
  • precipitation hardening stainless steel include SUS630 and SUS631.
  • Hv Vickers hardness
  • the age-hardening metal is a beryllium copper alloy
  • the effects of easy plastic deformation and excellent mechanical strength after precipitation hardening are obtained.
  • the beryllium copper alloy include beryllium copper alloys containing 0.8% to 4.0% (more preferably 1.5% to 3.5%) of beryllium. In this case, a value of 200 to 350 as the Vickers hardness (Hv) can be obtained by precipitation hardening for 2 hours at 320 to 330 ° C.
  • the age-hardening metal is Nikkenore Manganese Copper Alloy (Nickel Manganese Yoro)
  • Nikkenore Manganese Copper Alloy Nickel Manganese Yoro
  • An example of the nickel manganese copper alloy is a nickel manganese copper alloy containing about 20% nickel and about 20% manganese, with the balance being copper.
  • a precipitation hardening treatment at 400 ° C for 2 hours gave a Vickers hardness (Hv) of about 420. It is.
  • the age-hardening metal is a precipitation hardening titanium alloy
  • the effects of easy plastic deformation and excellent mechanical strength after precipitation hardening can be obtained.
  • Precipitation hardening titanium alloys have a relatively low specific gravity, so that the total weight of the weight support can be further reduced, and the amount of eccentricity in the eccentric weight can be further increased. For this reason, it is possible to configure a vibration motor that can obtain a necessary vibration amount with lighter weight and less power consumption.
  • Low specific gravity precipitation hardened titanium alloys include titanium alloys containing about 6% aluminum and about 4% vanadium (Ti_6Al_4V) and titanium alloys containing about 6% aluminum and about 2% vanadium (Ti-6A1-2V) ) Is exemplified. In this case, a value of about 300 Vickers hardness (Hv) can be obtained by precipitation hardening for 2 hours at 450 ° C.
  • the thickness of the thin metal member may be in the range of 0.05 mm to 0.5 mm. preferable.
  • the thickness of the thin metal member is less than 0.05 mm, the strength required for the weight support may not be obtained. If the thickness of the thin metal member exceeds 0.5 mm, This is because the effect of reducing the total weight of the weight support and further increasing the amount of eccentricity in the eccentric weight may not be obtained. From these viewpoints, the thickness of the thin metal member is more preferably in the range of 0.08 mm to 0.3 mm.
  • the amount of the material constituting the weight support can be further reduced while maintaining the required strength.
  • the total weight of the eccentric weight can be further reduced, and the amount of eccentricity in the eccentric weight can be further increased. For this reason, by using such an eccentric weight, it is possible to configure a vibration motor that can obtain a necessary vibration amount with lighter and less power consumption.
  • the weight is selected from the group consisting of tandasten, tungsten alloy, osmium, osmium alloy, gold, gold alloy, iridium or iridium alloy. It is preferable to consist of. [0054]
  • tungsten, tungsten alloy, sumidium, osmium alloy, gold, gold alloy, iridium or iridium alloy has a very high specific gravity, so that the amount of eccentricity in the eccentric weight can be further increased. it can. For this reason, by using such an eccentric weight, it is possible to construct a vibration motor that can obtain the required amount of vibration with less power consumption.
  • the weight since the weight does not need a function for holding the motor shaft, the weight has a very simple shape (for example, a cross-section such as a circle, an ellipse, or a sector). Can be adopted. For this reason, as a weight, a sintered body sintered in the shape of a weight, or a sintered body with a deformed bar force having the same cross-sectional shape as a weight (for example, a circle, an ellipse, a fan shape, etc.) is cut short. You can use what you have done.
  • the weight is held in the weight holding portion over a half circumference.
  • half or more means more than half of the entire circumference of the weight on a plane perpendicular to the longitudinal direction of the weight (ie, a plane perpendicular to the motor shaft).
  • the weight may be held in the weight holding portion over the entire length of the weight, but it is not necessarily required to be held in the weight holding portion over the entire length of the weight.
  • the weight support is a weight that holds the weight from one side or both sides in a direction along the motor shaft. It is preferable to have a holding frame.
  • the weight support can hold the weight from one side or both sides in the direction along the motor shaft. For this reason, when the vibration motor (and the eccentric weight) is used for a long time, the reliability of the connection between the weight and the weight support decreases. Therefore, by using such an eccentric weight, it is possible to configure a vibration motor with higher reliability and long-term reliability.
  • the weight is a plane having a predetermined first plane including the central axis of the motor shaft holding portion as a symmetry plane. It preferably has a symmetrical shape.
  • the weight can be inserted into the weight holding part from any end side, so that the degree of freedom in placing the weight in the weight holding part is increased, and the work is performed. Improves. For this reason, the manufacturing cost at the time of manufacturing an eccentric weight can be made low.
  • the central axis of the motor shaft holding portion is an axis on which the central axis of the motor shaft is located when the motor shaft holding portion holds the motor shaft That is.
  • a vibration motor of the present invention includes a motor body and the eccentric weight according to any one of (1) to (18).
  • the vibration motor of the present invention is an eccentric weight that can be suitably used for a vibration motor that can obtain a necessary vibration amount with light weight and low power consumption. Because it is equipped with an excellent eccentric weight that suppresses the decrease in the reliability of the connection between the weight and the weight support when the vibration motor is used for a long time, the required amount of vibration is reduced with light weight and low power consumption. The vibration motor is obtained with high reliability for a long time.
  • the weight holding portion in which a length of the weight holding portion along a longitudinal direction of the weight is shorter than the weight is used as the eccentric weight.
  • An eccentric weight for holding the weight at an eccentric position along the longitudinal direction of the weight is provided, and the eccentric weight is closer to the motor body in a direction in which the distance between the motor shaft holding portion and the motor body is closer. It is preferable to be fixed to.
  • a portable device of the present invention includes the vibration motor according to (19) or (20). Features.
  • the portable device of the present invention a necessary amount of vibration can be obtained with light weight and low power consumption, and since a highly reliable vibration motor is provided for a long time, light weight and low power consumption are required. A large amount of vibration can be obtained, and the portable device is highly reliable for a long time.
  • FIG. 1 is a view for explaining an eccentric weight according to a first embodiment.
  • FIG. 2 is a view for explaining the manufacturing method of the eccentric weight according to the first embodiment.
  • FIG. 3 is a view for explaining the vibration motor according to the first embodiment.
  • FIG. 4 is a view for explaining an eccentric weight according to the second embodiment.
  • FIG. 5 is a view for explaining an eccentric weight according to the third embodiment.
  • FIG. 6 is a view for explaining an eccentric weight according to the fourth embodiment.
  • FIG. 7 is a view for explaining an eccentric weight according to the fifth embodiment.
  • FIG. 8 is a perspective view of an eccentric weight according to a sixth embodiment.
  • FIG. 9 is a view for explaining an eccentric weight according to the seventh embodiment.
  • FIG. 10 is a view for explaining an eccentric weight according to an eighth embodiment.
  • FIG. 11 is a view for explaining an eccentric weight according to the ninth embodiment.
  • FIG. 12 is a view for explaining the manufacturing method for the eccentric weight according to the ninth embodiment.
  • FIG. 13 is a view for explaining the vibration motor according to the ninth embodiment.
  • FIG. 14 is a view for explaining an eccentric weight according to the tenth embodiment.
  • FIG. 15 is a view for explaining a conventional vibration motor and an eccentric weight.
  • FIG. 16 is a view for explaining another conventional eccentric weight.
  • FIG. 1 is a view for explaining an eccentric weight 120 according to the first embodiment.
  • Fig. 1 (a) is a view of the weight support 130 of the eccentric weight 120 as viewed from the front
  • Fig. 1 (b) is a view of the weight support 130 of the eccentric weight 120 as viewed from the side.
  • Fig. 1 (d) is a view of the weight support 130 at 0 from the bottom.
  • FIG. 1 (e) is a perspective view of the weight support 130 in the eccentric weight 120
  • FIG. 1 (f) is a perspective view of the eccentric weight 120.
  • FIG. 2 is a view for explaining the method of manufacturing the eccentric weight 120 according to the first embodiment.
  • FIG. 2 (a) to FIG. 2 (h) are diagrams showing each step.
  • the eccentric weight 120 according to Embodiment 1 is manufactured by integrating two weights 140 having a circular cross section and a weight support 130.
  • Weight 140 is made of a high specific gravity metal.
  • the weight support 130 is made of a metal elastic body having a specific gravity lower than that of the high specific gravity metal constituting the weight 140.
  • the weight support 130 has a weight holding part 134 for holding the weight 140 and a motor shaft holding part 132 for holding the motor shaft 112 (see FIG. 3).
  • the weight holding portion 134 has a weight side protruding portion 135 that reduces the amount of protrusion to the weight 140 side when the weight 140 and the weight support 130 are integrated.
  • the weight support 130 is a weight support manufactured by plastically deforming the thin metal member 130a into a predetermined shape and then performing a hardening process.
  • the eccentric weight 120 is composed of the weight 140 made of a high specific gravity metal and the weight support made of a metal having a specific gravity lower than that of the high specific gravity metal constituting the weight 140. Since the eccentric weight 120 manufactured by integrating 130 is used, the total weight of the eccentric weight 120 can be reduced and the amount of eccentricity in the eccentric weight 120 can be increased. Therefore, by using such an eccentric weight 120, it is possible to configure a vibration motor that can obtain a necessary vibration amount with light weight and low power consumption.
  • the weight support 130 is a weight support that has elastic force
  • the weight 140 and the weight are used when the vibration motor (and the eccentric weight 120) is used for a long time. It is suppressed that the reliability of joining with the support body 130 falls. For this reason, by using such an eccentric weight 120, it is possible to construct a vibration motor with high long-term reliability.
  • the eccentric weight 120 when the weight holding part 134 is integrated with the weight 140 and the weight support 130, the amount of protrusion to the weight 140 side is reduced. Since the weight holding portion having the protruding portion 135 is used, the weight 140 has the elastic force of the weight side protruding portion 135. The weight holding portion 134 is held by the added elastic force. For this reason, when the vibration motor (and the eccentric weight 120) is used for a long time, the reliability of the connection between the weight 140 and the weight support 130 is further suppressed. By using it, a vibration motor with higher long-term reliability can be configured.
  • the motor shaft 112 since the weight support 130 is a weight support made of an elastic body, the motor shaft 112 (see FIG. 3) has a motor shaft holding portion 1 by elastic force. Will be held at 32. For this reason, when the vibration motor is used for a long time, it is possible to suppress a decrease in the reliability of joining between the motor shaft 112 and the weight support 130, and it is possible to configure a vibration motor with high long-term reliability.
  • the size of the inner peripheral portion of the weight holding portion 134 before integrating the weight 140 and the weight support 130 is larger than the size of the outer peripheral portion of the weight 140. Try to be small. As a result, the weight 140 is inserted into the weight holding part 134 in a state where the inner peripheral part is expanded, so that the weight 140 is held by the weight holding part 134 by the elastic force of the entire weight holding part 134. Become.
  • the inner diameter of the motor shaft holding part 132 is preferably smaller than the outer diameter of the motor shaft 112 (see FIG. 3).
  • the weight side protruding portion 135 has a structure in which the protruding amount toward the weight 140 side becomes smaller as the weight 140 is inserted into the weight holding portion 134. have.
  • the weight 140 is inserted into the weight holding portion 134, and the weight 140 gradually pushes the weight side protruding portion 135 outward according to the weight. It will be a crap. For this reason, the operation of inserting the weight 140 into the weight holding portion 134 is facilitated, and the manufacturing cost for manufacturing the eccentric weight 120 can be reduced.
  • the motor shaft holding portion 132 is connected to the motor shaft holding portion 132 as shown in FIGS. 1 (a) and 1 (d).
  • the motor shaft holding portion 132 When entering It has a motor shaft side protrusion 133 that reduces the amount of protrusion to the motor shaft 112 side.
  • the motor shaft 112 is held by the motor shaft holding portion 132 by a stronger elastic force to which the elastic force of the motor shaft side protruding portion 133 is added. become. For this reason, when the vibration motor is used for a long time, it is possible to suppress a decrease in the reliability of the connection between the motor shaft 112 and the weight support 130, and thus a vibration motor with a long-term reliability can be configured. it can.
  • the motor shaft side protruding portion 133 has a smaller amount of protrusion to the motor shaft 112 side as the motor shaft 112 is inserted into the motor shaft holding portion 132. It has a structure that keeps going.
  • the eccentric weight 120 according to the first embodiment, as the motor shaft 112 is inserted into the motor shaft holding portion 132, the motor shaft 112 gradually moves the motor shaft side protruding portion 133 outward. I will push it. For this reason, the operation of inserting the motor shaft 112 into the motor shaft holding portion 132 is facilitated, and the manufacturing cost when manufacturing the vibration motor using the eccentric weight 120 can be reduced.
  • the weight support 130 has a shape that surrounds the two weights 140 from the outer periphery in order to hold the two weights 140. This part is called a weight holding part 134.
  • the weight support 130 has a shape surrounding the motor shaft 112 from the outer periphery in order to hold the motor shaft 112. This part is called a motor shaft holding part 132.
  • the two weights 140 are each held by the weight holding part 134 over a half circumference.
  • “more than half a circle” means more than half a circle with respect to the entire outer circumference of the weight 140 in a plane perpendicular to the longitudinal direction of the weight 140 (that is, a plane perpendicular to the motor shaft 112). It is.
  • the weight 140 may be held by the weight holding part 134 over the entire length of the weight 140 as in the case of the eccentric weight 120 according to the first embodiment. In the eccentric weight of the invention, the weight holding part 134 does not necessarily have to be held over the entire length of the weight 140.
  • the weight support 130 is subjected to a hardening process after plastically deforming the thin metal member 130a into a predetermined shape as shown in FIG. It consists of the elastic body manufactured by.
  • the amount of the material constituting the weight support 130 can be made extremely small while maintaining the necessary strength. Thereby, the total weight of the eccentric weight 120 can be reduced, and the amount of eccentricity in the eccentric weight 120 can be further increased. For this reason, by using such an eccentric weight 120, it is possible to construct a vibration motor that can obtain a necessary vibration amount with lighter weight and less power consumption.
  • the Vickers hardness (HV) of the weight support 130 is 150 or more.
  • the weight support 130 can hold the weight 140 with a strong elastic force and can hold the motor shaft 112 with a strong elastic force.
  • the Vickers hardness (Hv) of the weight support 130 is preferably 200 or more, more preferably 250 or more.
  • the thickness of the thin metal member 130a is set to 0.1 mm. Therefore, while maintaining the strength required for the weight support 130, the total weight of the weight support 130 can be reduced and the amount of eccentricity in the eccentric weight 120 can be further increased.
  • the length along the motor shaft 112 in the weight 140 (along the longitudinal direction of the weight 140) is 4 mm. is there. Further, the length along the motor shaft 112 in the weight holding portion 134 of the weight support 130 is also 4 mm, and the length along the motor shaft 112 in the motor shaft holding portion 132 of the weight support 130 is also 4 mm. .
  • the weight 140 holds the weight in the weight support 130 in all the lengths (4 mm) along the long direction of the weight 140. Held in part 134. As a result, the weight 140 is held on the weight support 130 by tension.
  • the weight 140 has a circular cross-sectional shape, so that the weight 140 is connected to any end (the end S shown in FIG. 1 (b)). , S.)
  • the weight holding part 134 can be inserted from the 1 2 side, the degree of freedom in placing the weight 140 in the weight holding part 134 is increased, and workability is improved. For this reason, the manufacturing cost at the time of manufacturing the eccentric weight 120 can be made low.
  • the weight 140 is made of a tungsten sintered alloy
  • the weight support 130 is made of martensitic stainless steel having a specific gravity lower than that of the tungsten alloy.
  • the weight support 130 is made of a martensitic stainless steel after an elastic hardening treatment, the durability of the weight support 130 is improved, and the weight support 130 and the weight 140 are combined. It becomes possible to integrate more firmly, and it is further suppressed that the reliability of the connection between the weight 140 and the weight support 130 is lowered when the vibration motor (and the eccentric weight 120) is used for a long time. . Therefore, by using such an eccentric weight 120, it is possible to configure a vibration motor with high long-term reliability.
  • martensitic stainless steel is a material that has relatively high corrosion resistance and is difficult to crack. Therefore, even if it is used as a weight support, it is not necessary to apply a plating. As a result, the joint between the weight support 130 and the plating film and the plating film itself are not cracked, and no cracks are generated due to cracks. It is suppressed that the reliability regarding the holding
  • martensitic stainless steels are more viscous than tungsten alloys, so brittle and fragile weights such as tungsten alloys should be held around the entire circumference with viscous martensitic stainless steels. Therefore, the problem that the weight is easily broken is also suppressed.
  • the weight support 130 is made of such relatively inexpensive martensitic stainless steel, so that the eccentric weight 120 of It becomes easy to reduce the manufacturing cost.
  • the weight 140 is made of a tungsten alloy. Since the tungsten alloy has a very high specific gravity, the amount of eccentricity in the eccentric weight 120 can be further increased. For this reason, by using such an eccentric weight 120, it is possible to configure a vibration motor that can obtain a necessary vibration amount with further reduced power consumption.
  • the weight 140 itself does not need a function for holding the motor shaft 112. Therefore, the shape of the weight is extremely simple (cylindrical shape). Is adopted.
  • the weight 140 As a manufacturing method of the weight 140, a manufacturing method in which a tungsten alloy is sintered into a weight shape to obtain the weight 140 can be adopted.
  • the tungsten alloy is made of A round bar with a simple shape is made by sintering, and the round bar is cut into short pieces to produce a weight of 140.
  • the amount of the additive (for example, copper) contained in the tandasten alloy can be reduced, so that the specific gravity can be increased and the amount of eccentricity in the eccentric weight 120 can be further increased. become able to.
  • the eccentric weight 120 according to Embodiment 1 can be manufactured, for example, by the following method.
  • a sheet metal member 130a made of martensitic stainless steel is prepared (FIG. 2 (a)).
  • a portion 135a that becomes the weight side protruding portion 135 and a portion 133a that becomes the motor shaft side protruding portion 133 are already formed.
  • the lines indicated by reference signs X to X are virtual lines that serve as a reference during processing.
  • the part extending to X and the part extending from X to X are deformed by plastic deformation and separated.
  • a portion corresponding to the copper holding portion 134 is formed (FIG. 2 (c) to FIG. 2 (e)).
  • a part corresponding to the motor shaft holding part 132 is formed by machining to form a member 130b having substantially the same shape as the weight support body 130 (FIG. 2 (f)).
  • the member 130b having substantially the same shape as the weight support 130 is subjected to a hardening process by quenching to produce the weight support 130 (FIG. 2 (g)).
  • a tungsten alloy round bar having the same cross-sectional shape as that of the weight 140 is prepared.
  • the weight 140 is inserted into the weight holding portion 134 in a state where the inner peripheral portion is expanded. At this time, the weight 140 gradually pushes the weight side protruding portion 135 outward as the weight 140 is inserted into the weight holding portion 134. Thereafter, after the weight 140 is completely inserted into the weight holding portion 134, the state in which the inner peripheral portion is pushed out is released. As a result, the weight 140 is held in the weight holding portion 134 by the elastic force of the weight side protruding portion 135 and the elastic force of the entire weight support 134.
  • FIG. 3 is a view for explaining the vibration motor 100 according to the first embodiment.
  • 3 (a) is a perspective view of the vibration motor 100 according to the first embodiment
  • FIG. 3 (b) is a view of the vibration motor 100 according to the first embodiment as viewed from the front
  • FIG. FIG. 3 is a view of a part of the vibration motor 100 according to the first embodiment as viewed from the side.
  • the vibration motor 100 according to the first embodiment is a vibration motor including a motor body 110 and an eccentric weight 120.
  • the vibration motor 100 according to the first embodiment is an eccentric weight that can be suitably used for a vibration motor that can obtain a necessary vibration amount with light weight and low power consumption, as described above. It is equipped with an excellent eccentric weight 120 that suppresses a decrease in the reliability of the connection between the weight and the weight support when used for a long time. For this reason, the vibration motor 100 according to the first embodiment is a vibration motor having such an excellent eccentric weight 120, so that a necessary vibration amount can be obtained with light weight and low power consumption, and high reliability for a long time. It becomes a vibration motor.
  • the device can be a portable device with light weight, low power consumption and high reliability for a long time.
  • FIG. 4 is a view for explaining the eccentric weight 220 according to the second embodiment.
  • Fig. 4 (a) is a view of the weight support 230 of the eccentric weight 220 as viewed from the front
  • Fig. 4 (b) is a view of the weight 240 of the eccentric weight 220 as viewed from the front. It is the figure which looked at the eccentric weight 220 from the front.
  • the eccentric weight 220 according to the second embodiment is different from the eccentric weight 120 according to the first embodiment in the number and cross-sectional shape of the weight (and accordingly, the cross-sectional shape of the weight support). That is, as shown in FIG. 4, the eccentric weight 220 according to the second embodiment includes a single weight 240 having a substantially fan-shaped cross-sectional shape (and a single weight 240 having a substantially fan-shaped cross-sectional shape accordingly). It has a weight support 230) having a cross-sectional shape to hold.
  • the weight holding part 234 in the weight support body 230 has two weight side protrusions 235 and 235.
  • FIG. 5 is a view for explaining the eccentric weight 320 according to the third embodiment.
  • Fig. 5 (a) shows the weight support 330 of the eccentric weight 320 as seen from the front
  • Fig. 5 (b) shows the weight 340 of the eccentric weight 320 as seen from the front. It is the figure which looked at the eccentric weight 320 from the front.
  • the eccentric weight 320 according to the third embodiment also has the same number of weights and cross-sectional shape (and the corresponding cross-sectional shape of the weight support body) as the first embodiment. This is different from the case of the eccentric weight 120. That is, as shown in FIG. 5, the eccentric weight 320 according to the third embodiment includes one weight 340 having a substantially fan-shaped cross-sectional shape (and one weight having a substantially fan-shaped cross-sectional shape accordingly).
  • a weight support 330 having a cross-sectional shape to hold 340;
  • the weight holding portion 334 in the weight support 330 has four weight-side protruding portions 335, 335, 335, and 335.
  • the eccentric weights 220 and 320 according to the second or third embodiment have the same number of weights and the cross-sectional shape (and the corresponding cross-sectional shape of the weight support body) as the eccentric weight 120 according to the first embodiment.
  • an eccentric weight is manufactured by integrating a weight made of a high specific gravity metal and a weight support made of a metal having a specific gravity lower than that of the high specific gravity metal constituting the weight. Since the eccentric weights 220 and 320 are used, the total weight of the eccentric weights 220 and 320 can be reduced and the amount of eccentricity in the eccentric weights 220 and 320 can be increased, as in the case of the eccentric weight 120 according to the first embodiment. . Therefore, by using such eccentric weights 220 and 320, it is possible to configure a vibration motor that can obtain a large amount of vibration with light weight and low power consumption.
  • the weight support body is made of the elastic body force, and thus the split weight support bodies 230 and 330, so that the split weights 240 and 340 are held equally.
  • the weight holding portions 234 and 334 are held by the entire elastic force. For this reason, when the vibration motor (and the eccentric weight) is used for a long time, the reliability of the connection between the weight 240, 340 and the weight support 230, 330 is suppressed, and such an eccentric weight 220, 320 is suppressed. By using, a vibration motor with high long-term reliability can be configured.
  • the eccentric weights 220 and 320 when the weight holding part is integrated with the weight and the weight support, the weight-side protrusion is reduced to the weight side. Since the weight holding parts 234 and 334 having the parts 2 35 and 335 are used, the weights 240 and 340 are held by the weight holding parts 234 and 334 with a stronger elastic force to which the elastic force of the weight side protruding parts 235 and 335 is added. It will be. Therefore, when the vibration motor (and eccentric weight 220, 320) is used for a long time, the reliability of the connection between the weight 240, 340 and the weight support 230, 330 is reduced. By using such eccentric weights 220 and 320, a vibration motor with higher long-term reliability can be configured.
  • FIG. 6 is a view for explaining the eccentric weight 420 according to the fourth embodiment.
  • Fig. 6 (a) is a front view of the weight support 430 of the eccentric weight 420
  • Fig. 6 (b) is a cross-sectional view of Fig. 6 (a)
  • Fig. 6 (c) is a diagram.
  • Fig. 6 (b) is a cross-sectional view taken along the line A-A
  • Fig. 6 (d) shows Fig. 6 (
  • FIG. 6 (b) is a cross-sectional view taken along the line AA
  • FIG. 6 (e) is a view of the eccentric weight 420 as viewed from the front.
  • the eccentric weight 420 according to the fourth embodiment has a structure very similar to the eccentric weight 120 according to the first embodiment, but the structure of the weight side protrusion is the eccentric weight 120 according to the first embodiment. Is different. That is, the weight side protrusion 435 in the eccentric weight 420 according to the fourth embodiment is formed of a rib having a rectangular planar shape as shown in FIG. 6 (b). And weight side protrusion In the portion 435, two opposite sides of the four sides of the rectangle are connected to the main body of the weight holding portion 434, and the other two sides are separated from the weight holding portion 434.
  • FIG. 7 is a view for explaining the eccentric weight 520 according to the fifth embodiment.
  • Fig. 7 (a) is a front view of the weight support 530 of the eccentric weight 520
  • Fig. 7 (b) is a cross-sectional view taken along the line 8-A in Fig. 7 (a)
  • Fig. 7 (c) is the eccentricity.
  • Fig. 7 (d) is a front view of the weight 520.
  • FIG. 4 is a perspective view of an eccentric weight 520.
  • the eccentric weight 520 according to the fifth embodiment also has a structure similar to that of the eccentric weight 120 according to the first embodiment.
  • the structure of the part is different from that of the eccentric weight 120 according to the first embodiment.
  • the weight side protrusion 535 of the eccentric weight 520 according to Embodiment 5 is a rib whose rectangular shape is a plane as shown in FIG. 7 (b).
  • the weight-side protruding portion 535 two opposite sides of the four sides of the rectangle are connected to the body of the weight holding portion 534, and the other two sides are separated from the weight holding portion 534. Les.
  • the eccentric weights 420 and 520 according to the fourth or fifth embodiment are different from the case of the eccentric weight 120 according to the first embodiment in that the structure of the weight side protrusion is as shown in FIGS.
  • eccentric weights 420, 520 manufactured by integrating a weight made of a high specific gravity metal with a weight support made of a metal having a specific gravity lower than that of the high specific gravity metal constituting the weight. Therefore, as in the case of the eccentric weight 120 according to the first embodiment, the total weight of the eccentric weights 420 and 520 can be reduced and the amount of eccentricity in the eccentric weights 420 and 520 can be increased. For this reason, by using such eccentric weights 420 and 520, it is possible to configure a vibration motor that is lightweight and can obtain a large amount of vibration with low power consumption.
  • the weight support body is made of the elastic body force, and the split weight support bodies 430 and 530, so the split weights 440 and 540 are held in the same volume. 534 is held by the weight holding parts 434 and 534 by the elastic force of the whole. For this reason, when the vibration motor (and the eccentric weight) is used for a long time, the reliability of the connection between the weights 440 and 540 and the weight support 430 and 530 is suppressed, and such an eccentric weight 420, 520 is suppressed. By using, a vibration motor with high long-term reliability can be configured.
  • the weight holding portion is a weight.
  • the weight-side protrusion 4 35, 535 is used as the weight holding part 434, 534, so that the weight 440, 540 is the weight-side protrusion 435.
  • 535 is added to the weight holding part 434, 534 with a stronger elastic force. For this reason, when the vibration motor (and eccentric weight) is used for a long time, the reliability of the connection between the weights 440 and 540 and the weight support bodies 430 and 530 is further suppressed. By using the weights 420 and 520, a vibration motor with higher long-term reliability can be configured.
  • the weight support body 530 includes weights 540 from both sides in the direction along the motor shaft, as shown in Figs. 7 (b) and 7 (d). It has a weight holding frame 536 that holds the weight.
  • the weight support 530 can hold the weight 540 from both sides in the direction along the motor shaft.
  • the reliability of the connection between the weight 540 and the weight support body 530 is further suppressed, so by using such an eccentric weight 520, A vibration motor with higher long-term reliability can be configured.
  • FIG. 8 is a perspective view of an eccentric weight 620 according to the sixth embodiment.
  • the eccentric weight 620 according to the sixth embodiment has a structure very similar to the eccentric weight 120 according to the first embodiment, but is implemented in that a weight support body provided with a predetermined opening is used. This is different from the case of the eccentric weight 120 according to Form 1.
  • the weight support 630 is manufactured by using a thin metal member provided with a predetermined opening.
  • the amount of the material constituting the weight support 630 can be further reduced while maintaining the required strength.
  • the total weight of the eccentric weight 620 can be further reduced, and the amount of eccentricity in the eccentric weight 620 can be further increased.
  • FIG. 9 is a view for explaining the eccentric weight 720 according to the seventh embodiment.
  • FIG. 9A is a view of the eccentric weight 720 as viewed from the front
  • FIG. 9B is a view of the eccentric weight 720 coupled to the motor shaft 712 as viewed from the front.
  • the eccentric weight 720 according to the seventh embodiment does not have a weight side protrusion for holding the weight with a strong elastic force.
  • the weight support 730 in the seventh embodiment has a structure in which the weight holding part 732 holds the weight 740 with a stronger elastic force when the motor shaft 712 is inserted into the motor shaft holding part 732. Have.
  • a slight gap is formed between the weight holding portion 734 and the weight 740 before the motor shaft 712 is inserted (FIG. 9). (See part C of (a).) After the motor shaft 712 is inserted, the motor shaft 712 pushes and spreads the motor shaft holding portion 732, so that the motor shaft holding portion 732 and the weight holding portion 734 are elastic. As a result, the gap formed between the weight holding portion 734 and the weight 740 disappears (see FIG. 9B). For this reason, the weight holding portion 732 holds the weight 740 with a stronger elastic force.
  • the eccentric weight 720 according to the seventh embodiment, it is further suppressed that the reliability of the connection between the weight 740 and the weight support 730 is lowered when the vibration motor is used for a long time.
  • a vibration motor with higher long-term reliability can be configured.
  • FIG. 10 is a view for explaining the eccentric weight 820 according to the eighth embodiment.
  • FIG. 10 (a) is a view of the weight support 830 of the eccentric weight 820 as seen from the front
  • FIG. 10 (b) is a view of the eccentric weight 820 as seen from the front
  • FIG. 10 (c) is a front view of the eccentric weight 820 coupled to the motor shaft 812.
  • the eccentric weight 820 according to the eighth embodiment does not have a weight side protrusion for holding the weight with a stronger elastic force.
  • the weight support 830 in the eighth embodiment is the case of the eccentric weight 720 according to the seventh embodiment.
  • the space defined by the motor shaft holding portion 832 is reduced.
  • the area of the space defined by the motor shaft holding portion 832 is approximately the same as the cross-sectional area of the motor shaft 812 before the weight 840 is inserted.
  • the weight 840 pushes and spreads the weight holding portion 834, so that the motor shaft holding portion 832 is elastically deformed and the motor shaft holding portion 832 The defining space becomes smaller (see Fig. 10 (b)). Therefore, when the motor shaft 812 is inserted into the motor shaft holding portion 832, the motor shaft holding portion 832 holds the motor shaft 812 with a stronger elastic force (see FIG. 10C). Further, in this case, when the motor shaft 812 is inserted into the motor shaft holding portion 832, the weight holding portion 834 is elastically deformed and tends to be further reduced, so that the weight holding portion 834 has a stronger elastic force. It comes to hold.
  • the eccentric weight 820 when the vibration motor is used for a long time, the reliability of the connection between the weight 840 and the weight support 830 decreases, or the motor shaft 812 Since it is further suppressed that the reliability of joining with the weight support 830 is lowered, a vibration motor with higher long-term reliability can be configured.
  • FIG. 11 is a view for explaining the eccentric weight 920 according to the ninth embodiment.
  • Fig. 11 (a) is a view of the weight support 930 of the eccentric weight 920 from the front
  • Fig. 11 (b) is a view of the weight support 930 of the eccentric weight 920 from the side.
  • c) is a view of the weight support 930 of the eccentric weight 920 as seen from the bottom
  • Fig. 11 (d) shows the A-in Fig. 11 (a)
  • FIG. 11 (e) is a perspective view of the weight support 930 in the eccentric weight 920.
  • FIG. 11 (f) is a perspective view of the eccentric weight 920.
  • FIG. 12 is a view for explaining the method of manufacturing the eccentric weight 920 according to the ninth embodiment.
  • FIG. 12 (a) to FIG. 12 (i) are diagrams showing each process.
  • FIG. 13 is a view for explaining the vibration motor 900 according to the ninth embodiment.
  • FIG. 13 (a) is a perspective view of the vibration motor 900 according to the ninth embodiment
  • FIG. 13 (b) is a view of the vibration motor 900 according to the ninth embodiment as viewed from the front
  • FIG. Vibration motor according to embodiment 9 It is the figure which looked at a part of 900 from the side.
  • the eccentric weight 920 according to the ninth embodiment is similar to the eccentric weight 720 according to the seventh embodiment when the motor shaft 912 (see Fig. 13) is inserted into the motor shaft holding portion 932.
  • 934 Force S Has a structure that holds the weight 940 with a stronger elastic force.
  • the eccentric weight 920 when the motor shaft 912 is inserted, the motor shaft 912 pushes the motor shaft holding portion 932 and the weight holding portion 934 becomes stronger.
  • the weight 940 is held by the elastic force.
  • the eccentric weight 920 according to the ninth embodiment as in the case of the eccentric weight 720 according to the seventh embodiment, the weight 940 and the weight support 930 when the vibration motor 900 is used for a long time. Therefore, the use of such an eccentric weight makes it possible to construct a vibration motor with higher long-term reliability.
  • the weight support body 930 includes a weight holding frame 936 that holds the weight 940 from one side in the direction along the motor shaft 912. have.
  • the weight support body 930 can hold the weight 940 from one side in the direction along the motor shaft 912, as shown in FIG. Therefore, when the vibration motor (and the eccentric weight 920) is used for a long time, the reliability of the connection between the weight 940 and the weight support 930 is further suppressed, so that such an eccentric weight 920 By using, it is possible to construct a vibration motor with higher long-term reliability.
  • the eccentric weight 920 according to the ninth embodiment plastically deforms one thin metal member 930a into a predetermined shape as in the case of the eccentric weight 120 according to the first embodiment. Then, it can be produced by performing a curing treatment.
  • FIG. 14 is a view for explaining the eccentric weight 1020 according to the tenth embodiment.
  • Fig. 14 (a) is a view of the weight support 1030 of the eccentric weight 1020 as viewed from the front
  • Fig. 14 (b) is a view of the weight support 1030 of the eccentric weight 1020 as viewed from the side.
  • c) is a perspective view of the eccentric weight 1020, and FIG. It is the figure which looked at a part from the side.
  • the eccentric weight 1020 according to the tenth embodiment has a structure very similar to the eccentric weight 120 according to the first embodiment, but the length of the weight holding portion 1030 along the longitudinal direction of the weight 1040 is actual. This is different from the case of the eccentric weight 120 according to the first embodiment. That is, in the eccentric weight 1020 according to the tenth embodiment, as shown in FIGS. 14 (c) and 14 (d), the length of the weight holding portion 1030 along the longitudinal direction of the weight 1040 is related to the first embodiment. The length is about 50% of the case of the eccentric weight 120.
  • the length of the weight holding part along the longitudinal direction of the weight is different from that of the eccentric weight 120 according to the first embodiment, but other than this In this respect, since the configuration is the same as that of the eccentric weight 120 according to the first embodiment, the effect of the eccentric weight 120 according to the first embodiment is obtained as it is.
  • the length of the weight holding portion 1030 along the longitudinal direction of the weight 1040 is about 50% as compared with the case of the eccentric weight 120 according to the first embodiment. Therefore, the total weight of the eccentric weight 1020 can be further reduced, and the eccentric amount of the eccentric weight 1020 can be further increased. Therefore, according to the eccentric weight 1020 according to the tenth embodiment, it is possible to configure a vibration motor that can obtain a necessary vibration amount with light weight and low power consumption.
  • the vibration motor 1000 includes a weight holding portion 1034 in which the length of the weight holding portion 1034 along the longitudinal direction of the weight 1040 is shorter than the weight 1040.
  • An eccentric weight 1020 that holds the weight 1040 at an eccentric position along the longitudinal direction of the weight 1040 is provided.
  • the eccentric weight 1020 is fixed to the motor main body 1010 in a direction in which the distance between the motor shaft holding portion 1032 and the motor main body 1010 approaches.
  • the vibration motor 1000 according to the tenth embodiment, the distance between the motor shaft holding portion 1032 of the eccentric weight 1020 and the bearing 1014 of the motor main body 1010 is close, so that the motor shaft 1012 rotates. Deflection of the motor shaft 1012 is suppressed. As a result, the eccentric weight 1 020 rotates more stably, and the eccentric vibration characteristics of the vibration motor 1000 are improved.
  • the force using tungsten alloy as the weight is not limited to this.
  • tungsten, osmium, osmium alloy, gold, gold alloy, iridium, iridium alloy, and other metals having higher specific gravity than the weight support can be used.
  • the force using martensitic stainless steel as the thin metal member is not limited to this.
  • a metal having quenching hardenability other than martensitic stainless steel can be used.
  • the metal which has age-hardening property can also be used.
  • precipitation hardening stainless steel, beryllium copper alloy, nickel manganese copper alloy or precipitation hardening titanium alloy can be used as the metal having age hardening.
  • a weight a cut body or a round bar obtained by machining a sintered body made of a round bar into a cross-sectional shape that is the same as the cross-sectional shape of the weight.
  • the present invention is not limited to this.
  • a weight a sintered body sintered in the shape of a weight or a sintered body with a deformed bar force having the same cross-sectional shape as the weight cross-sectional shape (for example, a circle, an ellipse, a fan shape, etc.) is shortened. Use a cut one.
  • the eccentric weights 720 to 920 of the respective embodiments 7 to 9 do not have the motor shaft side protruding portion and the weight side protruding portion.
  • the motor shaft side protruding portion 133 and the weight side protruding portion 135 as in the eccentric weight 120 of the first embodiment may be provided.
  • the vibration motor of the present invention is preferably used for portable devices such as mobile phones and PDAs, and is also preferably used for game machine remote controls, pachinko operating units, electric toothbrushes, and the like. Can do.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

L’invention concerne une masse excentrique (120) fabriquée par intégration d’une masse (140) et d’un corps support de masse (130). La masse (140) est constituée d’un métal de haute densité. Le corps support de masse (130) comporte une partie de maintien de masse (134) servant à maintenir la masse (140) et une partie de maintien d’arbre de moteur (132) servant à maintenir un arbre de moteur, et est constitué d’un corps métallique élastique dont la densité est inférieure à celle du métal de haute densité constituant la masse (140). La partie de maintien de masse (134) comporte une partie protubérante (135) côté masse dont la protubérance du côté de la masse (140) est réduite lorsque la masse (140) et le corps support de masse (130) sont intégrés. L’invention permet de réduire le poids total de la masse excentrique (120) et d’augmenter sa quantité d’excentricité. De plus, la fiabilité de la jonction entre la masse excentrique (140) et le corps support de masse (130) est préservée même en cas d’utilisation prolongée.
PCT/JP2005/006659 2005-04-05 2005-04-05 Masse excentrique, moteur a vibration et appareil portatif WO2006109350A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2005/006659 WO2006109350A1 (fr) 2005-04-05 2005-04-05 Masse excentrique, moteur a vibration et appareil portatif
PCT/JP2005/024039 WO2006109365A1 (fr) 2005-04-05 2005-12-28 Poids excentrique et son procede de fabrication, moteur vibrant, dispositif mobile

Applications Claiming Priority (1)

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PCT/JP2005/006659 WO2006109350A1 (fr) 2005-04-05 2005-04-05 Masse excentrique, moteur a vibration et appareil portatif

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PCT/JP2005/024039 WO2006109365A1 (fr) 2005-04-05 2005-12-28 Poids excentrique et son procede de fabrication, moteur vibrant, dispositif mobile

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002079179A (ja) * 2000-09-11 2002-03-19 Mabuchi Motor Co Ltd 振動発生用小型モータ
JP2003245608A (ja) * 2002-02-25 2003-09-02 Namiki Precision Jewel Co Ltd 振動モータ用分銅および振動モータ

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002079179A (ja) * 2000-09-11 2002-03-19 Mabuchi Motor Co Ltd 振動発生用小型モータ
JP2003245608A (ja) * 2002-02-25 2003-09-02 Namiki Precision Jewel Co Ltd 振動モータ用分銅および振動モータ

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