WO2006040808A1 - Masse excentrique, son procede de fabrication, moteur vibrant et appareil portable - Google Patents

Masse excentrique, son procede de fabrication, moteur vibrant et appareil portable Download PDF

Info

Publication number
WO2006040808A1
WO2006040808A1 PCT/JP2004/014972 JP2004014972W WO2006040808A1 WO 2006040808 A1 WO2006040808 A1 WO 2006040808A1 JP 2004014972 W JP2004014972 W JP 2004014972W WO 2006040808 A1 WO2006040808 A1 WO 2006040808A1
Authority
WO
WIPO (PCT)
Prior art keywords
weight
eccentric weight
eccentric
motor shaft
holding portion
Prior art date
Application number
PCT/JP2004/014972
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/JP2004/014972 priority Critical patent/WO2006040808A1/fr
Priority to PCT/JP2005/018666 priority patent/WO2006041045A1/fr
Publication of WO2006040808A1 publication Critical patent/WO2006040808A1/fr

Links

Classifications

    • 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 manufacturing method thereof, a vibration motor, and a portable device.
  • FIG. 21 is a diagram for explaining a conventional vibration motor and an eccentric weight.
  • Fig. 21 (a) is a perspective view of a vibration motor
  • Fig. 21 (b) is a cross-sectional view of an eccentric weight cut along a plane perpendicular to the motor axis
  • Fig. 21 (c) is an eccentric weight along the motor axis.
  • a conventional vibration motor 1800 includes a small cylindrical motor body 1810 and an eccentric weight 1820 having a substantially fan shape and having a force such as a sintered body of tungsten.
  • the motor shaft 1812 of the motor body 1810 is generally held in the motor shaft holding hole 1822 of the eccentric weight 1820.
  • Eccentric weight 1820 is attached to the tip of motor shaft 1812 by crimping by deforming motor shaft holding hole 1822 by applying an external force to the motor shaft holding hole 1822 through which the motor shaft 1812 is inserted. (For example, see Patent Document 1).
  • FIG. 22 is a view for explaining another conventional eccentric weight.
  • Fig. 22 (a) is a front view
  • Fig. 22 (b) is a cross-sectional view along the line A-A in Fig. 22 (a)
  • Fig. 22 (c) is a front view of the component
  • Fig. 22 (d) Is a sectional view taken along the line BB in FIG. 22 (c).
  • a part of the motor body 1910 is also shown.
  • Another conventional eccentric weight 1920 has a motor shaft 1 of a motor body 1910 as shown in FIG.
  • a cylindrical weight support 1930 having a motor shaft holding hole 1932 for holding 912 and having a low specific gravity metal force
  • a substantially half-pipe weight 1940 having a high specific gravity metal force (for example, a patent) (Refer to Reference 1.)
  • the weight 1940 also has a high specific gravity metal force, so the center of gravity of the eccentric weight 1920 is arranged at a position where the center axial force of the motor shaft holding hole 1932 is also separated.
  • the eccentric amount of the eccentric weight 1920 increases, and by using such other conventional eccentric weight 1920, a vibration motor that can obtain a required vibration amount with light weight and low power consumption can be configured.
  • Patent Document 1 JP 2001-129479 A
  • the weight 1940 is integrally bonded and fixed to a part of the outer surface 1934 of the weight support 1930 via the brazing portion 1950.
  • an object of the present invention is to provide an eccentric weight and a method of manufacturing the same, in which the reliability of the connection between the weight and the weight support is suppressed even when such a vibration motor is used for a long time. It is another object of the present invention 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 having a high specific gravity metal force, a weight holding portion for holding the weight over a half circumference, a motor shaft holding portion for holding a motor shaft, and the weight
  • the eccentric weight of the present invention includes a weight having a high specific gravity metal force, a weight holding portion for holding the weight over a half circumference, a motor shaft holding portion for holding a motor shaft, and the weight
  • An eccentric weight having a holding portion and a connecting portion for connecting the motor shaft holding portion, and comprising a weight support made of a metal having a specific gravity lower than that of the high specific gravity metal constituting the weight, the connecting portion Has a shape that forms a single connecting rod when viewed from the direction along the motor shaft.
  • the eccentric weight has a specific gravity lower than that of the high specific gravity metal and the high specific gravity metal constituting the weight. Since the eccentric weight is provided with a weight support made of metal, 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 vibration motor (and the eccentric weight)
  • copper is used for a long time, it is possible to suppress a decrease in the reliability of bonding between the weight and the weight support. Therefore, by using such an eccentric weight, a vibration motor with high long-term reliability can be configured.
  • the eccentric weight is provided.
  • the total weight of the 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 connecting portion that connects the weight holding portion and the motor shaft holding portion is a single connecting rod when viewed from the direction along the motor shaft. Since it has such a shape, 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 a lighter weight and less power consumption. [0015] In the eccentric weight described in (1) above, the larger the thickness of the thin region and the Z or hole in the connecting portion, the lighter the total weight of the eccentric weight, and There is a benefit that the amount of eccentricity can be increased.
  • the eccentric weight of the present invention it is preferable to weigh these advantages and disadvantages to determine the thin region and z or hole size in the connection portion.
  • the total weight of the eccentric weight is reduced and the eccentric weight is reduced as the width of the connecting portion as viewed from the direction along the motor shaft is reduced.
  • the benefit is that the amount of eccentricity can be increased.
  • the width of the connecting portion is made too thin, the mechanical strength of the connecting portion is lowered, resulting in a disadvantage that the reliability of the eccentric weight is impaired. Therefore, in the eccentric weight of the present invention, it is preferable to determine the width of the connecting portion as viewed from the direction along the motor shaft by weighing these advantages and disadvantages.
  • the eccentric weight of the present invention includes a weight having a high specific gravity metal force, a weight holding part for holding the weight over a half circumference, a motor shaft holding part for holding a motor shaft, and the weight.
  • a weight support body having a structure in which a plurality of thin plate members made of a metal having a specific gravity lower than that of the high specific gravity metal constituting the weight are stacked, the connecting portion connecting the holding portion and the motor shaft holding portion;
  • the connecting portion of the thin plate member includes a thin region having a thickness smaller than a length along the motor shaft in the motor shaft holding portion and Z or the motor shaft. It is characterized by having holes that open on both sides.
  • the eccentric weight of the present invention includes a weight having a high specific gravity metal force, a weight holding part for holding the weight over a half circumference, a motor shaft holding part for holding a motor shaft, and the weight
  • a weight support body having a structure in which a plurality of thin plate members made of a metal having a specific gravity lower than that of the high specific gravity metal constituting the weight are stacked, the connecting portion connecting the holding portion and the motor shaft holding portion;
  • Each connecting portion of the thin plate member has a shape that forms a single connecting rod when viewed from the direction along the motor shaft. It is a sign.
  • the eccentric weight has a specific gravity lower than that of the high specific gravity metal and the high specific gravity metal constituting the weight. Since the eccentric weight includes a weight support body having a structure in which a plurality of thin plate members made of metal are laminated, 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 eccentric weight described in the above (3) since the predetermined thin area and Z or the predetermined hole are provided in the connecting portion of each thin plate member, the total weight of the eccentric weight is further reduced. At the same time, the amount of eccentricity in the eccentric weight can be further increased. Therefore, by using such an eccentric weight, it is possible to configure a vibration motor that can obtain a necessary vibration amount with lighter weight and less power consumption.
  • the connecting portion of each thin plate member is shaped so as to be a single connecting rod when viewed from the direction along the motor shaft.
  • 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 advantage that the amount of eccentricity in can be increased is obtained.
  • the thickness of the thin area and Z or hole in each connecting part is made too large, the mechanical strength of the connecting part will decrease and the reliability of the eccentric weight may be impaired. It becomes. Therefore, in the eccentric weight of the present invention, these benefits and disadvantages are weighed, It is preferred to determine the thin area and z or hole size at each connection.
  • the total weight of the eccentric weight is reduced as the width of each connecting portion as viewed from the direction along the motor shaft is reduced.
  • the advantage that the amount of eccentricity in can be increased is obtained.
  • the width of each connecting portion is made too narrow, the mechanical strength of the connecting portion is lowered, and the disadvantage of deteriorating the reliability of the eccentric weight is caused. Therefore, in the eccentric weight of the present invention, it is preferable to determine the width of each connecting portion in view of the directional force along the motor shaft by weighing these advantages and disadvantages.
  • the motor shaft holding portion is a motor shaft holding portion that can hold the motor shaft over the entire circumference.
  • the opening force provided on the one side can also hold the motor shaft by, for example, three-way force by caulking and joining the opening after inserting the motor shaft. It may be.
  • the thin region has a thickness of 50% or less of a length along the motor shaft in the motor shaft holding portion. It is preferable to have
  • the weight of the connecting portion can be sufficiently reduced, so that the total weight of the eccentric weight is further reduced and the amount of eccentricity in the eccentric weight is further increased. Will be able to. 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 even less power consumption.
  • the thin region preferably has a rib.
  • the mechanical strength of the connecting portion can be increased.
  • a highly reliable vibration motor can be configured.
  • the mechanical strength of the connecting portion can be increased, it is possible to further reduce the weight of the connecting portion by enlarging the thin area or hole in the connecting portion. For this reason, the total weight of the eccentric weight can be further reduced, and the eccentric amount of the eccentric weight can be further increased. Therefore, by using such an eccentric weight, it is possible to configure a vibration motor that can obtain a necessary vibration amount with a lighter and less power consumption.
  • the thickness of the weight holding portion in the outer peripheral portion that holds the weight on the outer peripheral side of the eccentric weight (of the motor shaft) is preferably 0.4 mm or less.
  • the weight can be arranged on the outer peripheral portion as much as possible, and the weight can be made as large as possible. For this reason, the amount of eccentricity in the eccentric weight can be further increased. Therefore, by using such an eccentric weight, it is possible to configure a vibration motor that can obtain a necessary vibration amount with less power consumption.
  • the thickness of the weight holding portion in the outer peripheral portion is more preferably 0.3 mm or less, and further preferably 0.2 mm or less.
  • the thickness of the motor shaft holding portion is: It is preferable to be 4mm or less.
  • 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 thickness of the motor shaft holding portion is more preferably 0.3 mm or less, and even more preferably 0.2 mm or less.
  • the eccentric weight described in (1) or (3) can be manufactured by a relatively simple method.
  • the cutting method is preferably performed using an end mill, for example. Good.
  • the weight support or the thin plate member is manufactured by a metal powder injection molding method. ,.
  • the eccentric weight described in any one of (1) and (8) can be manufactured by a relatively simple method.
  • the thickness of the weight holding part and motor shaft holding part can be made thinner than that produced by the cutting method.
  • a motor can be configured.
  • the effect that the freedom degree of the weight support body and weight in an eccentric weight can be increased is also acquired.
  • the weight support or the thin plate member is preferably manufactured by a press drawing method. .
  • the eccentric weight described in any one of (1) and (8) above can be manufactured by a relatively simple method.
  • the thickness of the weight holding part and the motor shaft holding part can be made thinner than that produced by the metal fine powder injection molding method, so the required amount of vibration can be reduced with lighter weight and even less power consumption.
  • the resulting vibration motor can be configured.
  • the weight is held by the weight holding portion in the weight support over the entire circumference. For this reason, when the vibration motor is used for a long time, it is further suppressed that the reliability of the connection between the weight and the weight support is lowered.
  • the “entire circumference” means the entire outer circumference of the weight in a plane perpendicular to the longitudinal direction of the weight.
  • the specific gravity is lower than the high specific gravity metal constituting the weight, and the metal is preferably stainless steel. ,.
  • non-magnetic stainless steel can be preferably used in order to reduce the influence on the motor.
  • the weight is selected from the group consisting of tandasten, tungsten alloy, osmium, osmium alloy, gold, gold alloy, iridium or iridium alloy. I prefer to be.
  • tungsten, tungsten alloy, osmium, osmium alloy, gold, gold alloy, iridium or iridium alloy has an extremely high specific gravity, and therefore the amount of eccentricity in the eccentric weight can be further increased. . Therefore, by using such an eccentric weight, it is possible to configure a vibration motor that can obtain a necessary vibration amount 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.
  • 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.
  • a cut body obtained by cutting a sintered body made of a round bar and cutting it into the same cross-sectional shape as that of the weight.
  • a sintered body that also has a round bar force can be used as it is cut short.
  • 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 any of the end side force weight holding portions, so the degree of freedom when placing the weight in the weight holding portion is increased, and workability is improved. Will improve. 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.
  • the eccentric weight of the present invention has a weight inserted into a weight holding portion in a weight support.
  • It can be manufactured by caulking a weight support.
  • the eccentric weight of the present invention can also be manufactured by pressing the weight with a weight holding portion on the weight support in the weight support.
  • the eccentric weight of the present invention is a state where the temperature of the weight support is higher than the temperature of the weight.
  • It can also be manufactured by inserting a weight into a weight holding part in the weight support.
  • the eccentric weight of the present invention can also be produced by joining a weight and a weight support.
  • the joining can be performed by bonding the weight and the weight support, or by brazing the weight and the weight support, or the weight and the weight support can be joined together. It can also be performed by welding.
  • the eccentric weight of the present invention can be used in combination with the above-described method. For example, it can be manufactured by applying adhesive after crimping, applying adhesive after brazing, spot welding after crimping, or brazing after spot welding, etc. .
  • the weight is held in the weight holding portion over a half circumference, so that the weight is firmly held on the weight support. For this reason, when the vibration motor is used for a long time, the reliability of the connection between the weight and the weight support decreases.
  • a vibration motor according to the present invention includes a motor body and the eccentric weight according to any one of (1) and (15) above.
  • 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.
  • This is equipped with an excellent eccentric weight that suppresses the decrease in reliability of the connection between the weight and the weight support when the vibration motor is used for a long time. A large amount of vibration can be obtained, and long-term reliability is achieved, resulting in a vibration motor.
  • a portable device of the present invention includes the vibration motor according to (16).
  • 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 vibration motor with high reliability for a long time is provided, light weight and low power consumption are required. A large amount of vibration can be obtained, long-term reliability is high, and it becomes a portable device.
  • FIG. 1 is a view for explaining an eccentric weight according to a first embodiment.
  • FIG. 2 is a view for explaining the vibration motor according to the first embodiment.
  • FIG. 3 is a view for explaining an eccentric weight according to the second embodiment.
  • FIG. 4 is a view for explaining an eccentric weight according to a third embodiment.
  • FIG. 5 is a view for explaining an eccentric weight according to a fourth embodiment.
  • FIG. 6 is a view for explaining an eccentric weight according to the fifth embodiment.
  • FIG. 7 is a view for explaining an eccentric weight according to the sixth embodiment.
  • FIG. 8 is a view for explaining an eccentric weight according to the seventh embodiment.
  • FIG. 9 is a view for explaining an eccentric weight according to an eighth embodiment.
  • FIG. 10 is a view for explaining an eccentric weight according to the ninth embodiment.
  • FIG. 11 is a view for explaining a manufacturing method for manufacturing the eccentric weight according to the ninth embodiment.
  • FIG. 12 is a view for explaining an eccentric weight according to the tenth embodiment.
  • FIG. 13 is a view for explaining an eccentric weight according to the eleventh embodiment.
  • FIG. 14 is a view for explaining an eccentric weight according to the twelfth embodiment.
  • FIG. 15 is a view for explaining an eccentric weight according to the thirteenth embodiment.
  • FIG. 16 is a view for explaining an eccentric weight according to the fourteenth embodiment.
  • FIG. 17 is a view for explaining an eccentric weight according to the fifteenth embodiment.
  • FIG. 18 is a view for explaining an eccentric weight according to the sixteenth embodiment.
  • FIG. 19 is a view for explaining an eccentric weight according to the seventeenth embodiment.
  • FIG. 20 is a view for explaining the vibration motor using the eccentric weight according to the seventeenth embodiment.
  • FIG. 21 is a view for explaining a conventional vibration motor and an eccentric weight.
  • FIG. 22 is a view for explaining another conventional eccentric weight.
  • FIG. 1 is a view for explaining an eccentric weight according to the first embodiment.
  • Fig. 1 (a) is a front view of the eccentric weight according to Embodiment 1
  • Fig. 1 (b) is a schematic view of the eccentric weight according to Embodiment 1 as viewed from the front.
  • FIG. 1 (d) is a cross-sectional view taken along the line B-B in FIG. 1 (a)
  • FIG. 1 (e) is a cross-sectional view of the eccentric weight according to the first embodiment.
  • FIG. 1 (f) is a perspective view of the eccentric weight according to Embodiment 1 as seen from the rear side force in FIG. 1 (e).
  • the eccentric weight 120 has a substantially fan-shaped cross section. Copper 140 and weight support 130 are provided. Weight 140 also has high specific gravity metal power. The weight support body 130 also has a metal force having a specific gravity lower than that of the high specific gravity metal constituting the weight 140.
  • the weight support body 130 includes a weight holding portion 134 for holding the weight 140 over the entire circumference and a motor shaft holding portion 132 for holding the motor shaft 11 2 (see FIG. 2), the weight holding portion 134 and the motor. It has a connecting part 136 (the part shaded in FIG. 1 (b)) for connecting the shaft holding part 132.
  • the connecting part 136 is located between the weight holding part 134 and the motor shaft holding part 132.
  • the connecting portion 136 has a thin region 138 that opens to one side along the motor shaft 112.
  • the eccentric weight 120 includes the weight 140 made of a high specific gravity metal and the weight support having a lower specific gravity than the high specific gravity metal constituting the weight 140.
  • the total weight of the eccentric weight 120 can be reduced and the amount of eccentricity of 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 140 is held by the weight holding portion 134 of the weight support 130 over the entire circumference, so that the vibration motor (and the eccentric weight 120) is also provided. ) Is used for a long time, it is possible to prevent the reliability of bonding between the weight 140 and the weight support 130 from being lowered. Therefore, by using such an eccentric weight 120, it is possible to configure a vibration motor with high long-term reliability.
  • the predetermined thin region 138 is provided in the connecting portion 136 that connects the weight holding portion 134 and the motor shaft holding portion 132.
  • the total weight can be reduced and the amount of eccentricity in the eccentric weight can be further increased. Therefore, by using such an eccentric weight, it is possible to configure a vibration motor that can obtain a necessary vibration amount with a lighter and less power consumption.
  • a hole having a shape corresponding to the cross-sectional shape of the weight 140 is formed in the weight support 130 to hold the weight 140, but in the eccentric weight 120 according to the first embodiment, the hole is formed.
  • the portion around this hole is called a weight holding portion 134.
  • the weight support 130 has a hole having a shape corresponding to the cross-sectional shape of the motor shaft 112 in order to hold the motor shaft 112.
  • a portion around this hole is referred to as a motor shaft holding portion 132. Therefore, the connecting portion 136 connects the weight holding portion 134 and the motor shaft holding portion 132 as shown in FIG. 1 (b).
  • the entire circumference is the entire outer periphery of the weight 140 in a plane perpendicular to the longitudinal direction of the weight 140.
  • the eccentric weight 120 in the eccentric weight 120 according to the first embodiment, as shown in FIGS. 1 (c) and 1 (d), along the motor shaft 112 in the weight 140 (along the longitudinal direction of the weight 140).
  • the length is 4mm.
  • the length along the motor shaft 112 in the weight holder 134 of the weight support 130 is 2 mm, and the length along the motor shaft 112 in the motor shaft holder 132 of the weight support 130 is also 2 mm.
  • the thickness (thickness in the direction along the motor shaft 112) of the thin region 138 in the connecting portion 136 of the weight support 130 is 0.2 mm.
  • the weight 140 has a weight support 130 in a half length (2 mm) of the length (4 mm) along the length direction of the weight 140. Is held by the weight holder 134. As a result, the weight 140 is held on the weight support 130 by tension.
  • the thin region 138 has a thickness that is 10% of the length along the motor shaft 112 in the motor shaft holding portion 132.
  • the thin wall region 138 has a shape in which a portion having a depth of 1.8 mm is removed by cutting, so that the weight of the connecting portion 136 can be sufficiently reduced, and an eccentric weight is obtained.
  • the total weight of 120 can be further reduced, and the eccentric amount of 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 lighter and less power consumption.
  • the thickness in the radial direction of the motor shaft 112 of the weight holding portion 134 in the outer peripheral portion that holds the weight 140 from the outer peripheral side of the eccentric weight 120 Is 0.25 mm.
  • the weight 140 can be arranged on the outer peripheral portion as much as possible, and the weight 140 can be made as large as possible.
  • the amount of eccentricity at 20 can be further 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 less power consumption.
  • the thickness of the motor shaft holder 132 in the direction along the radial direction of the motor shaft 112 is 0.2 mm.
  • the total weight of the eccentric weight 120 can be further 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 configure a vibration motor that can obtain a necessary vibration amount with lighter and less power consumption.
  • the weight 140 has a substantially fan-shaped cross section, and includes a predetermined first weight including the central axis of the motor shaft holding portion 132. It has a plane-symmetric shape with a plane (indicated by A–A in Fig. 1 (a)) as a plane of symmetry.
  • the weight 140 is inserted into any end portion (see the end portions S and S shown in FIG. 1 (c).
  • the M-law force is also inserted into the weight holding portion 134.
  • the degree of freedom when placing the weight 140 on the weight holding portion 134 is increased, and the workability is improved. For this reason, the manufacturing cost at the time of manufacturing the eccentric weight 120 can be made low.
  • the central axis of the motor shaft holding portion 132 means that the central axis of the motor shaft 112 is located when the motor shaft holding portion 132 holds the motor shaft 112 (see FIG. 2). It is the axis that will be.
  • the weight 140 is made of a tungsten sintered alloy
  • the weight support 130 is made of a molten stainless steel having a specific gravity lower than that of the tungsten alloy.
  • the weight support 130 also has a stainless steel strength of a molten material having a specific gravity lower than that of the tungsten sintered alloy constituting the weight 140, the weight support 130 is improved in durability and the weight support 130 is improved. And the weight 140 can be integrated more firmly, and the reliability of the connection between the weight 140 and the weight support 1 30 is reduced when the vibration motor (and the eccentric weight 120) is used for a long time. This is further suppressed. For this reason, such eccentricity By using copper 120, a vibration motor with high long-term reliability can be configured.
  • the weight support body 130 is made of such a relatively inexpensive stainless steel, thereby reducing the manufacturing cost of the eccentric weight 120. Becomes easier.
  • the thin region 138 is formed by a cutting method.
  • the eccentric weight 120 according to Embodiment 1 can be manufactured by a relatively simple method.
  • the cutting method is performed using, for example, an end mill.
  • the weight 140 also has a tungsten alloy force. 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 weight is extremely simple (substantially fan-shaped). Adopting a bar shape with a cross section.).
  • the tungsten alloy is made of The manufacturing method is to make a round bar with a simple shape by sintering and then cut out the round bar to make a weight of 140. By doing so, the amount of the additive (for example, copper) contained in the tandastain 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. I can do it The
  • the eccentric weight 120 according to Embodiment 1 can be manufactured, for example, by the following method.
  • a member having a shape corresponding to the weight support 130 is manufactured by a press working method (however, the thin region 138 and the motor shaft holding portion 132 are not formed).
  • the weight support body 130 is manufactured by forming the thin region 138 and the motor shaft holding portion 132 on this member by a cutting method.
  • the weight support 134 is held by the weight support 134 by caulking the weight support 130 from the outside in a state where the weight 140 is inserted into the weight holding part 134 of the weight support 130.
  • the eccentric weight 120 in which the weight 140 is held by the weight holding portion 134 in the weight support 130 is manufactured over the entire circumference.
  • the weight 140 is held firmly by the weight holding portion 134 in the weight support 130 over the entire circumference, so that the vibration motor (and the eccentric weight 1
  • FIG. 2 is a view for explaining the vibration motor according to the first embodiment.
  • Fig. 2 (a) is a perspective view of the vibration motor according to Embodiment 1
  • Fig. 2 (b) is a view of the vibration motor according to Embodiment 1
  • Fig. 2 (c) is the embodiment.
  • 1 is a side view of a part of a vibration motor according to 1.
  • the vibration motor 100 according to the first embodiment is a vibration motor including a motor body 110 and an eccentric weight 120. Further, as described above, 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. Weight and weight when the motor is used for a long time An excellent eccentric weight 120 is provided in which deterioration of the reliability of bonding with the support is suppressed. For this reason, the vibration motor 100 according to the first embodiment is a vibration motor having such an excellent eccentric weight 120. Therefore, a required amount of vibration can be obtained with light weight and low power consumption, and long-term reliability can be obtained. High vibration motor.
  • the vibration motor 100 that is light and has a small amount of vibration with low power consumption and has high reliability for a long time as a vibration motor for portable devices, It can be a highly portable device that is lightweight, has low power consumption, and is reliable for a long time.
  • FIG. 3 is a view for explaining the eccentric weight according to the second embodiment.
  • Fig. 3 (a) is a front view of the eccentric weight according to Embodiment 2
  • Fig. 3 (b) is an AA cross-sectional view of Fig. 3 (a).
  • the eccentric weight 220 according to the second embodiment basically has the same structure as the eccentric weight 120 according to the first embodiment. However, the eccentric weight 220 according to the second embodiment is different from the eccentric weight 120 according to the first embodiment in the structure of the weight support 230 as shown in FIG. That is, in the eccentric weight 220 according to the second embodiment, the connecting portion 236 of the weight support 230 has a thin region 238 that opens on both sides along the motor shaft.
  • the eccentric weight 220 according to the second embodiment is different from the eccentric weight 120 according to the first embodiment in the structure of the weight support 230, but the eccentric weight is divided into components having high specific gravity metal force. Since the eccentric weight 220 is provided with the copper 240 and the weight support body 230 made of a metal having a specific gravity lower than that of the high specific gravity metal constituting the weight 240, the eccentric weight is the same as in the case of the eccentric weight 120 according to the first embodiment. The total weight of the weight 220 can be reduced and the amount of eccentricity in the eccentric weight 220 can be increased. Therefore, by using such an eccentric weight 220, 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 240 is held by the weight holding portion 234 in the weight support body 230 over the entire circumference, so the eccentric weight according to the first embodiment.
  • the eccentric weight 220 is used for a long time, it is possible to prevent the reliability of the connection between the weight 240 and the weight support 230 from being lowered. For this reason, By using the eccentric weight 220, a vibration motor with high long-term reliability can be configured.
  • the predetermined thin region 238 is provided in the connecting portion 236 that connects the weight holding portion 234 and the motor shaft holding portion 232.
  • the total weight of the eccentric weight 220 can be reduced and the amount of eccentricity in the eccentric weight 220 can be further increased. For this reason, by using such an eccentric weight 220, it is possible to configure a vibration motor that can obtain a necessary vibration amount with a lighter and less power consumption.
  • FIG. 4 is a view for explaining the eccentric weight according to the third embodiment.
  • 4 (a) is a front view of the eccentric weight according to Embodiment 3
  • FIG. 4 (b) is a cross-sectional view taken along line AA in FIG. 4 (a).
  • the eccentric weight 320 according to the third embodiment has basically the same structure as the eccentric weight 120 according to the first embodiment. However, the eccentric weight 320 according to the third embodiment is different from the eccentric weight 120 according to the first embodiment in the structure of the weight support 330 as shown in FIG. That is, in the eccentric weight 320 according to the third embodiment, the connecting portion 336 of the weight support 330 has holes 338 that are open on both sides along the motor shaft.
  • the eccentric weight 320 according to the third embodiment is different from the eccentric weight 120 according to the first embodiment in the structure of the weight support 330, but the eccentric weight is used as a component having a high specific gravity metal force. Since the eccentric weight 320 is provided with the copper 340 and the weight support body 330 made of a low density metal having a specific gravity lower than that of the high specific gravity metal constituting the weight 340, the eccentric weight is the same as in the case of the eccentric weight 120 according to the first embodiment. The total weight of the weight 320 can be reduced and the amount of eccentricity of the eccentric weight 320 can be increased. For this reason, by using such an eccentric weight 320, it is possible to configure a vibration motor that can obtain a large vibration amount with light weight and low power consumption.
  • the weight 340 is held by the weight holding portion 334 in the weight support body 330 over the entire circumference, so the eccentric weight according to the first embodiment.
  • the eccentric weight 320 is used for a long time, it is possible to suppress a decrease in the reliability of bonding between the weight 340 and the weight support 330. For this reason, By using the eccentric weight 320, a vibration motor with high long-term reliability can be configured.
  • the predetermined hole 338 is provided in the connecting portion 336 that connects the weight holding portion 334 and the motor shaft holding portion 332, and therefore, according to the first embodiment.
  • the total weight of the eccentric weight 320 can be reduced and the amount of eccentricity in the eccentric weight 320 can be further increased. Therefore, by using such an eccentric weight 320, it is possible to configure a vibration motor that can obtain a necessary vibration amount with lighter and less power consumption.
  • FIG. 5 is a view for explaining the eccentric weight according to the fourth embodiment.
  • FIG. 5 (a) is a front view of the eccentric weight according to Embodiment 4, and
  • FIG. 5 (b) is an AA cross-sectional view of FIG. 5 (a).
  • the eccentric weight 420 according to the fourth embodiment has basically the same structure as the eccentric weight 120 according to the first embodiment. However, the eccentric weight 420 according to the fourth embodiment is different from the eccentric weight 120 according to the first embodiment in the structure of the weight support 430, as shown in FIG. That is, in the eccentric weight 420 according to the fourth embodiment, the connecting portion 436 of the weight support 430 has a shape that forms a single connecting rod when viewed from the direction along the motor shaft. .
  • the eccentric weight 420 according to the fourth embodiment is different from the eccentric weight 120 according to the first embodiment in the structure of the weight support body 430, but the eccentric weight is divided into components having high specific gravity metal force. Since the eccentric weight 420 is provided with the copper 440 and the weight support body 430 made of a low weight metal having a specific gravity lower than that of the high specific gravity metal constituting the weight 440, the eccentric weight is the same as in the case of the eccentric weight 120 according to the first embodiment. While reducing the total weight of the weight 420, the amount of eccentricity in the eccentric weight 420 can be increased. For this reason, by using such an eccentric weight 420, it is possible to configure a vibration motor that can obtain a large vibration amount with light weight and low power consumption.
  • the weight 440 is held by the weight holding portion 434 in the weight support body 430 over the entire circumference, and therefore the eccentric weight according to the first embodiment.
  • the eccentric weight 420 is used for a long time, it is possible to suppress a decrease in the reliability of the connection between the weight 440 and the weight support 430. For this reason, By using the eccentric weight 420, a vibration motor with high long-term reliability can be configured.
  • the connecting portion 436 that connects the weight holding portion 434 and the motor shaft holding portion 432 is formed with a single connecting rod by looking at the directional force along the motor shaft. Therefore, the total weight of the eccentric weight 420 can be reduced and the amount of eccentricity in the eccentric weight 420 can be further increased. For this reason, the use of such an eccentric weight 420 makes it possible to construct a vibration motor that can obtain the required amount of vibration with a lighter weight and less power consumption, as in the case of the eccentric weight 120 according to the first embodiment. can do.
  • FIG. 6 is a view for explaining the eccentric weight according to the fifth embodiment.
  • FIG. 6 (a) is a front view of the eccentric weight according to Embodiment 5, and
  • FIG. 6 (b) is an AA cross-sectional view of FIG. 6 (a).
  • the eccentric weight 520 according to the fifth embodiment has basically the same structure as the eccentric weight 120 according to the first embodiment. However, as shown in FIG. 6, the eccentric weight 520 according to the fifth embodiment has the shape of the weight 540 (and the shape of the weight holding portion 534 in the weight support 530) as shown in FIG. It is different from the case of. That is, in the eccentric weight 520 according to the fifth embodiment, the weight 540 has an oval shape.
  • the eccentric weight 520 according to the fifth embodiment has the shape of the weight 540 (and the shape of the weight holding portion 534 in the weight support 530) corresponding to the eccentric weight 120 according to the first embodiment. Because the eccentric weight is an eccentric weight 520 having a weight 540 made of a high specific gravity metal and a weight support 530 made of a metal having a specific gravity lower than that of the high specific gravity metal constituting the weight 540, As in the case of the eccentric weight 120 according to the first embodiment, the total weight of the eccentric weight 520 can be reduced and the amount of eccentricity in the eccentric weight 520 can be increased. Therefore, by using such an eccentric weight 520, it is possible to configure a vibration motor that can obtain a large vibration amount with light weight and low power consumption.
  • the weight 540 is held by the weight holding portion 534 in the weight support body 530 over the entire circumference, and therefore the eccentric weight according to the first embodiment.
  • the vibration motor and eccentric weight 520
  • the predetermined thin region 538 is provided in the connecting portion 536 that connects the weight holding portion 534 and the motor shaft holding portion 532, so that Embodiment 1 As in the case of the eccentric weight 120 according to the above, the total weight of the eccentric weight 520 can be reduced and the amount of eccentricity in the eccentric weight 520 can be further increased. For this reason, by using such an eccentric weight 520, it is possible to configure a vibration motor that can obtain a required vibration amount with lighter and less power consumption.
  • FIG. 7 is a view for explaining the eccentric weight according to the sixth embodiment.
  • FIG. 7 (a) is a front view of the eccentric weight according to Embodiment 6, and
  • FIG. 7 (b) is an AA cross-sectional view of FIG. 7 (a).
  • the eccentric weight 620 according to the sixth embodiment has basically the same structure as the eccentric weight 120 according to the first embodiment. However, the eccentric weight 620 according to the sixth embodiment is different from the eccentric weight 120 according to the first embodiment in the shape of the weight support 630 as shown in FIG. That is, in the eccentric weight 620 according to the sixth embodiment, the weight support 630 serves as the weight holding portion instead of the weight holding portion that holds the weight over the entire circumference, and covers the entire outer periphery of the weight 640. There is a weight holding part 634 for holding the weight 640 over a half circumference.
  • the eccentric weight 620 according to the sixth embodiment is different from the eccentric weight 120 according to the first embodiment in the structure of the weight support 630, but the eccentric weight is divided into components having high specific gravity metal force. Since the eccentric weight 620 includes the copper 640 and the weight support body 630 made of a low weight metal having a specific gravity lower than that of the high specific gravity metal constituting the weight 640, the eccentric weight 120 is the same as in the case of the eccentric weight 120 according to the first embodiment. The total weight of the weight 620 can be reduced and the amount of eccentricity in the eccentric weight 620 can be increased. Therefore, by using such an eccentric weight 620, 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 640 is held by the weight holding portion 634 in the weight support 630 over more than half a circumference.
  • the deterioration of the bonding reliability between the weight 640 and the weight support 630 is suppressed when the vibration motor (and the eccentric weight 620) is used for a long time. Therefore, by using such an eccentric weight 620, a vibration motor with high long-term reliability can be configured.
  • the predetermined thin region 638 is provided in the connecting portion 636 that connects the weight holding portion 634 and the motor shaft holding portion 632, so that Embodiment 1 As in the case of the eccentric weight 120 according to the above, the total weight of the eccentric weight 620 can be reduced and the amount of eccentricity in the eccentric weight 620 can be further increased. For this reason, by using such an eccentric weight 620, it is possible to configure a vibration motor that can obtain a necessary vibration amount with lighter and even less power consumption.
  • the width L of the opening in the weight holding portion 634 is in the width direction of the opening in the weight 640.
  • FIG. 8 is a view for explaining the eccentric weight according to the seventh embodiment.
  • FIG. 8 (a) is a front view of the eccentric weight according to Embodiment 7, and
  • FIG. 8 (b) is an AA cross-sectional view of FIG. 8 (a).
  • the eccentric weight 720 according to the seventh embodiment basically has the same structure as the eccentric weight 120 according to the first embodiment. However, the eccentric weight 720 according to the seventh embodiment is different from the eccentric weight 120 according to the first embodiment in the structure of the weight support 730 as shown in FIG. That is, in the eccentric weight 720 according to the seventh embodiment, the weight support 730 replaces the motor shaft holding portion that holds the motor shaft over the entire circumference as the motor shaft holding portion. A motor shaft holding portion 732 that also holds a three-way force is provided. After the motor shaft is inserted into the motor shaft holding portion 732, the opening is forced and held by the weight support 730 with tension.
  • the eccentric weight 720 according to the seventh embodiment is different from the eccentric weight 120 according to the first embodiment in that the structure of the weight support 730 is different from that of the eccentric weight 120 according to the first embodiment.
  • Weight support made of copper 740 and a low-density metal with a specific gravity higher than that of the high specific gravity metal that composes weight 740 Since the eccentric weight 720 including the body 730 is used, as in the case of the eccentric weight 120 according to the first embodiment, the total weight of the eccentric weight 720 can be reduced and the amount of eccentricity in the eccentric weight 720 can be increased. Therefore, by using such an eccentric weight 720, 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 740 is held by the weight holding portion 734 in the weight support body 730 over the entire circumference, and therefore the eccentric weight according to the first embodiment.
  • the vibration motor and the eccentric weight 720
  • the predetermined thin region 738 is provided in the connecting portion 736 that connects the weight holding portion 734 and the motor shaft holding portion 732, so that the first embodiment 1 Similarly to the case of the eccentric weight 120 according to the above, the total weight of the eccentric weight 720 can be reduced and the amount of eccentricity in the eccentric weight 720 can be further increased. Therefore, by using such an eccentric weight 720, it is possible to configure a vibration motor that can obtain a necessary vibration amount with lighter and less power consumption.
  • FIG. 9 is a view for explaining the eccentric weight according to the eighth embodiment.
  • Fig. 9 (a) is a diagram of the eccentric weight according to Embodiment 8 as viewed from the front
  • Fig. 9 (b) is a schematic diagram of the eccentric weight according to Embodiment 8 as viewed from the front.
  • FIG. 9 (d) is a cross-sectional view taken along the line BB in FIG. 9 (a)
  • FIG. 9 (e) is a cross-sectional view of the eccentric weight according to the eighth embodiment.
  • FIG. 9 (f) is a perspective view of the eccentric weight according to Embodiment 8 as seen from the rear side force in FIG. 9 (e).
  • the eccentric weight 820 according to the eighth embodiment basically has the same structure as the eccentric weight 420 according to the fourth embodiment. However, the eccentric weight 820 according to the eighth embodiment is different from the eccentric weight 420 according to the fourth embodiment in the method of manufacturing the weight support 830. That is, in the eccentric weight 820 according to Embodiment 8, the weight support 830 is manufactured by the metal powder injection molding method. As described above, the eccentric weight 820 according to the eighth embodiment is different from the eccentric weight 420 according to the fourth embodiment in the manufacturing method of the weight support 830, but the eccentric weight is made of a high specific gravity metal.
  • the eccentric weight 820 is provided with the weight 840 and the weight support 830 made of a metal having a specific gravity lower than that of the high specific gravity metal constituting the weight 840.
  • the total weight of the eccentric weight 820 can be reduced and the amount of eccentricity in the eccentric weight 820 can be increased. For this reason, by using such an eccentric weight 820, 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 840 is held by the weight holding portion 834 in the weight support 830 over the entire circumference, so that the eccentric weight according to the fourth embodiment.
  • the vibration motor and the eccentric weight 820
  • the connecting portion 836 for connecting the weight holding portion 834 and the motor shaft holding portion 832 has a single connecting rod and a directional force along the motor shaft. Therefore, as in the case of the eccentric weight 420 according to the fourth embodiment, the total weight of the eccentric weight 820 can be reduced and the amount of eccentricity in the eccentric weight 820 can be further increased. For this reason, by using such an eccentric weight 820, it is possible to configure a vibration motor that can obtain a necessary vibration amount with lighter and less power consumption.
  • the eccentric weight 820 according to the eighth embodiment since it is manufactured by the metal powder injection molding method, it is manufactured by the cutting method as in the case of the eccentric weight 420 according to the fourth embodiment. Rather than that, the thickness of the weight holding part 834 and the motor shaft holding part 832 can be reduced, and a vibration motor that can obtain the necessary vibration amount with lighter and less power consumption can be configured. Therefore, in the eccentric weight 820 according to the eighth embodiment, as shown in FIG. 9C, the thicknesses of the weight holding portion 834 and the motor shaft holding portion 832 are 0.15 mm.
  • eccentric weight 820 according to the eighth embodiment when manufactured by a cutting method As compared with the above, an effect that the waste of the material is reduced can be obtained.
  • eccentric weight 820 according to the eighth embodiment, there is an effect that the degree of freedom of the shape of the weight support 830 and the weight 840 in the eccentric weight 820 can be increased.
  • FIG. 10 is a view for explaining the eccentric weight according to the ninth embodiment.
  • Fig. 10 (a) is a diagram of the eccentric weight according to Embodiment 9 as viewed from the front
  • Fig. 10 (b) is a schematic diagram of the eccentric weight according to Embodiment 9 as viewed from the front.
  • Fig. 10 (a) is a cross-sectional view taken along the line A-A
  • Fig. 10 (d) is a cross-sectional view taken along the line BB of Fig. 10 (a)
  • Fig. 10 (e) is a perspective view of the eccentric weight according to the ninth embodiment.
  • FIG. 10 (f) is a perspective view of the eccentric weight according to Embodiment 9 as seen from the back side of FIG. 10 (e).
  • FIG. 11 is a view for explaining the manufacturing method for manufacturing the eccentric weight according to the ninth embodiment.
  • FIG. 11 (a) -FIG. 11 (f) are diagrams showing the main part in the manufacturing process.
  • the eccentric weight 920 according to the ninth embodiment is different from the eccentric weight 120, 820 according to the first or eighth embodiment in the method of manufacturing the weight support 930. That is, in the eccentric weight 920 according to the ninth embodiment, the weight support 930 is manufactured by a press drawing method.
  • the eccentric weight 920 according to the ninth embodiment is manufactured by the following process.
  • a workpiece W made of stainless steel having a thickness of 0.5 mm is disposed at a predetermined position between a die plate 962 in the die for press drawing and a punch plate 972 in the punch die ( (See Figure 11 (a).)
  • the punching die (and punch 974) is lowered toward the workpiece W, and a portion corresponding to the thin region 938 in the motor shaft holding portion 932 and a portion corresponding to the hole in the weight holding portion 934 are formed. Plastically deform. At this time, the portion constituting the motor shaft holding portion 932 and the portion constituting the weight holding portion 934 are also plastically deformed and extend downward in the drawing (FIG. 11 (b) —FIG. 11). See (d);).
  • This press drawing process can be performed by performing a single press, and the die mold 960 and the punch mold 970 must not be replaced. Force Can also be done by pressing multiple times.
  • remove the workpiece W from the press stop device 950 is removed by cutting the unnecessary parts min in weight support (see FIG. 11 (e) and FIG. 11 (f).) 0 in this case, unnecessary portions Cut along the broken lines L, L, L in Fig. 11 (e).
  • the weight support body 930 is manufactured.
  • the eccentric weight 920 according to the ninth embodiment is different from the eccentric weight 120, 820 according to the first or eighth embodiment in that the method of manufacturing the weight support 930 is different from the eccentric weight 120, 820 in the high specific gravity.
  • the eccentric weight 920 includes a weight 940 made of a metal and a weight support 930 made of a low weight metal having a specific gravity lower than that of the high specific gravity metal constituting the weight 940, the eccentric weight 120 according to the first or eighth embodiment 120, As in the case of 820, the total weight of the eccentric weight 920 can be reduced and the amount of eccentricity in the eccentric weight 920 can be increased. Therefore, by using such an eccentric weight 920, it is possible to configure a vibration motor that can obtain a large vibration amount with light weight and low power consumption.
  • the weight 940 is held by the weight holding portion 934 in the weight support body 930 over the entire circumference, so that the eccentric weight according to the first or eighth embodiment is used.
  • the vibration motor and the eccentric weight 920
  • the predetermined thin region 938 is provided in the connecting portion 936 that connects the weight holding portion 934 and the motor shaft holding portion 932.
  • the total weight of the eccentric weight 920 can be reduced and the amount of eccentricity in the eccentric weight 920 can be further increased. Therefore, by using such an eccentric weight 920, it is possible to configure a vibration motor that can obtain a necessary vibration amount with lighter and less power consumption.
  • the eccentric weight 920 according to the ninth embodiment the eccentric weight according to the first or eighth embodiment.
  • the thickness of the weight holding part and the motor shaft holding part can be made thinner than that produced by the cutting method or metal powder injection molding method. It is possible to configure a vibration motor that can obtain the required amount of vibration with electric power. Therefore, in the eccentric weight 920 according to the ninth embodiment, as shown in FIG. 10 (c), the thickness of the weight holding part 934 and the motor shaft holding part 932 is 0.15 mm.
  • eccentric weight 920 according to the ninth embodiment, an effect that the waste of material is reduced as compared with the case of manufacturing by a cutting method is also obtained.
  • FIG. 12 is a view for explaining the eccentric weight according to the tenth embodiment.
  • FIG. 12 (a) is a view of the eccentric weight according to Embodiment 10 as viewed from the front
  • FIG. 12 (b) is a cross-sectional view taken along line AA in FIG. 12 (a).
  • the eccentric weight 1020 according to the tenth embodiment basically has the same structure as the eccentric weight 920 according to the ninth embodiment. However, the eccentric weight 1020 according to the tenth embodiment is different from the eccentric weight 920 according to the ninth embodiment in the structure of the weight support 1030 as shown in FIG. That is, in the eccentric weight 1020 according to the tenth embodiment, as shown in FIG. 12B, ribs 1039 are formed in the thin region 1038 of the connecting portion 1036 in the weight support 1030.
  • the mechanical strength of the connecting portion 1036 can be increased, so that a more reliable vibration motor can be configured.
  • the mechanical strength of the connecting portion 1036 can be increased, the thin area 1038 of the connecting portion 1036 can be enlarged to further reduce the weight of the connecting portion 1036. Therefore, the total weight of the eccentric weight 1020 can be further reduced, and the amount of eccentricity in the eccentric weight 1020 can be further increased. Therefore, by using such an eccentric weight 1020, it is possible to configure a vibration motor that can obtain a necessary vibration amount with lighter and less power consumption.
  • the eccentric weight 1020 according to the tenth embodiment has the same configuration as the eccentric weight 920 according to the ninth embodiment except for the above, and thus the eccentric weight 920 according to the ninth embodiment is provided. It has the effect to do as it is.
  • FIG. 13 is a view for explaining the eccentric weight according to the eleventh embodiment.
  • FIG. 13 (a) is a view of the eccentric weight according to the eleventh embodiment as viewed from the front
  • FIG. 13 (b) is a cross-sectional view taken along the line AA in FIG. 13 (a).
  • the eccentric weight 1120 according to the eleventh embodiment basically has the same structure as the eccentric weight 920 according to the ninth embodiment. However, the eccentric weight 1120 according to the eleventh embodiment is different from the eccentric weight 920 according to the ninth embodiment in the structure of the weight support 1130 as shown in FIG. That is, in the eccentric weight 1120 according to the eleventh embodiment, a hole 1138 is formed in the connecting portion 1136 in the weight support 1130.
  • the weight of the connecting portion 1130 can be further reduced. Therefore, the total weight of the eccentric weight 1120 can be further reduced, and the amount of eccentricity in the eccentric weight 1120 can be further increased. Therefore, by using such an eccentric weight 1120, it is possible to configure a vibration motor that can obtain a necessary vibration amount with a lighter and less power consumption.
  • the eccentric weight 1120 according to the eleventh embodiment has the same configuration as the eccentric weight 920 according to the ninth embodiment except for the above, and therefore the eccentric weight 920 according to the ninth embodiment is provided. It has the effect to do as it is.
  • FIG. 14 is a view for explaining the eccentric weight according to the twelfth embodiment.
  • FIG. 14 (a) is a view of the eccentric weight according to the twelfth embodiment as viewed from the front
  • FIG. 14 (b) is a cross-sectional view taken along line AA in FIG. 14 (a).
  • FIG. 15 is a view for explaining the eccentric weight according to the thirteenth embodiment.
  • FIG. 15 (a) is a diagram of the eccentric weight according to the thirteenth embodiment as viewed from the front
  • FIG. 15 (b) is a cross-sectional view taken along the line AA in FIG. 15 (a).
  • FIG. 16 is a view for explaining the eccentric weight according to the fourteenth embodiment.
  • FIG. 16 (a) is a view of the eccentric weight according to the embodiment 14 as viewed from the front
  • FIG. 16 (b) is a cross-sectional view taken along line AA in FIG. 16 (a).
  • FIG. 17 is a view for explaining the eccentric weight according to the fifteenth embodiment.
  • FIG. 17 (a) is a view of the eccentric weight according to the fifteenth embodiment as viewed from the front
  • FIG. 17 (b) is a cross-sectional view taken along line AA in FIG. 17 (a).
  • the eccentric weight is composed of the weight of the high specific gravity metal and the weight.
  • the eccentric weight 120-1120 according to the embodiment 11-11 the eccentric weight includes a weight support body having a structure in which a plurality of thin plate members made of a metal having a specific gravity lower than that of the high specific gravity metal is laminated.
  • Embodiment 12 1-15 [this deviation, weights 1220, 1320, 1420, 1520 [koyore ryoko, weights are held by each weight holding portion in the weight support over a half circumference] Therefore, as in the case of the eccentric weight 120-1120 according to Embodiment 1-11 11, 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. That force S is suppressed. Therefore, by using such eccentric weights 1220, 1320, 1420, 1520, a vibration motor with high long-term reliability can be configured.
  • FIG. 18 is a view for explaining the eccentric weight according to the sixteenth embodiment.
  • FIG. 18 (a) is a view of the eccentric weight according to the embodiment 16 as viewed from the front
  • FIG. 18 (b) is a cross-sectional view taken along the line A-A in FIG. 18 (a).
  • An eccentric weight 1620 according to the sixteenth embodiment has basically the same structure as the eccentric weight 920 according to the ninth embodiment. However, the eccentric weight 1620 according to Embodiment 16 is different from the eccentric weight 920 according to Embodiment 9 in the structure of the weight support 1630 as shown in FIG. The That is, in the eccentric weight 1620 according to the sixteenth embodiment, the thin wall region 1638 extends to both ends in the circumferential direction of the connecting portion 1636 of the weight support 1630.
  • the weight of the connecting portion 1636 can be further reduced. Therefore, the total weight of the eccentric weight 1620 can be further reduced, and the amount of eccentricity in the eccentric weight 1620 can be further increased. Therefore, by using such an eccentric weight 1620, it is possible to configure a vibration motor that can obtain a necessary vibration amount with lighter weight and less power consumption.
  • eccentric weight 1620 according to the sixteenth embodiment, it is possible to easily produce the weight support body by the press drawing method, which also has an effect.
  • the eccentric weight 1620 according to Embodiment 16 has the same configuration as that of the eccentric weight 920 according to Embodiment 9 in other points, and therefore the eccentric weight 920 according to Embodiment 9 is provided. It has the effect to do as it is.
  • FIG. 19 is a view for explaining the eccentric weight according to the seventeenth embodiment.
  • FIG. 19 (a) is a view of the eccentric weight according to the seventeenth embodiment when the front force is also seen
  • FIG. 19 (b) is a cross-sectional view taken along line AA in FIG. 19 (a).
  • FIG. 20 is a view for explaining the vibration motor including the eccentric weight according to the seventeenth embodiment.
  • FIG. 20 (a) is a view showing a vibration motor provided with the eccentric weight according to the seventeenth embodiment
  • FIG. 20 (b) is a view showing another vibration motor provided with the eccentric weight according to the seventeenth embodiment.
  • the eccentric weight 1720 according to the seventeenth embodiment has basically the same structure as the eccentric weight 1620 according to the sixteenth embodiment. However, the eccentric weight 1720 according to the seventeenth embodiment is different from the eccentric weight 1620 according to the sixteenth embodiment in the structure of the weight support 1730 as shown in FIG. That is, in the eccentric weight 1720 according to the seventeenth embodiment, the connecting portion 1736 that connects the weight holding portion 1734 and the motor shaft holding portion 1732 is a single connecting rod when viewed from the direction along the motor shaft 1712. It has a shape like this.
  • the connecting portion 1736 has a shape that forms a single connecting rod when viewed from the direction along the motor shaft 1 712. Therefore, the eccentric weight 172 The total weight of 0 can be reduced and the amount of eccentricity in the eccentric weight 1720 can be further increased. For this reason, by using such an eccentric weight 1720, a vibration motor that is lighter and has a smaller amount of vibration required for power consumption than that of the eccentric weight 1620 according to Embodiment 16 can be configured. be able to.
  • the eccentric weight 1720 according to the seventeenth embodiment has the same configuration as the eccentric weight 1620 according to the sixteenth embodiment except for this, and therefore, the eccentric weight 162 according to the sixteenth embodiment 162.
  • the motor shaft 1712 of the motor body 1710 is inserted into the motor shaft holding portion 1732 (see FIG. 19) of the eccentric weight 1720.
  • the eccentric weight 1720 fixes the eccentric weight 1740 of the eccentric weight 1720 in the longitudinal direction of the weight 1740 and fixes the motor shaft of the motor main body 1710. 1712 may be inserted into the motor shaft holder 1732 of the eccentric weight 1720 for use. In this case, since the distance between the bearing 1714 of the motor main body 1710 and the motor shaft holding portion 1732 of the eccentric weight 17 20 becomes short, the eccentric weight 1720 rotates more stably, and thus there is a benefit that the eccentric characteristic is improved. can get.
  • the force using tungsten alloy as the weight is not limited to this.
  • a metal having a specific gravity higher than that of tungsten, osmium, osmium alloy, gold, gold alloy, iridium, iridium alloy, and other weight supports can be used.
  • a sintered body made of a round bar is cut as a weight, and the cut body processed into the same cross-sectional shape as the weight is cut short.
  • the present invention is not limited to this.
  • a sintered body sintered in the shape of a weight, or a sintered body with a deformed bar force that has the same cross-sectional shape as a weight is cut short.
  • a sintered body having a round bar force can be used as it is cut short.
  • the manufacturing method of the eccentric weight according to the first embodiment includes a step of clamping the weight support 130 in a state where the weight 140 is inserted into a weight holding hole 134 of the weight support 130.
  • the manufacturing method may include a step of press-fitting the weight 140 into the weight holding hole 134 in the weight support body 130 with a tightening margin, and the temperature of the weight support body 130 is higher than the temperature of the weight 140
  • the manufacturing method may include a step of inserting the weight 140 into the weight holding hole 134 in the weight support 130.
  • attachment, or welding may be sufficient.
  • the manufacturing method may include a step of inserting the material of the weight support 130 into a mold in a state where a part or all of the weight 140 is placed in a predetermined mold.
  • the manufacturing method which used the above-mentioned process together may be sufficient.
  • a manufacturing method including a step of bonding after crimping, a manufacturing method including a step of bonding after brazing, a manufacturing method including a step of spot welding after crimping, and brazing after spot welding may be sufficient.
  • a manufacturing method including a step of bonding after crimping a manufacturing method including a step of bonding after brazing
  • a manufacturing method including a step of spot welding after crimping a step of spot welding after crimping
  • brazing after spot welding A manufacturing method including a process is also possible.
  • the vibration motor of the present invention can also be suitably used for a remote control of a game machine, a pachinko operation unit, an electric toothbrush, etc. suitably used for portable devices such as mobile phones and PDAs.

Abstract

L’invention concerne une masse excentrique (1720) comprenant une masse (1740) composée d’un métal à haute densité, et un porte-masse (1730) composé d’un métal dont la densité est inférieure à celle du métal à haute densité composant la masse (1740) et comportant une partie de maintien de masse (1734) pour maintenir le masse (1740) sur toute sa circonférence, une partie de maintien d’arbre de moteur (1732), et une partie (1736) pour accoupler la partie de maintien de masse (1734) et la partie de maintien d’arbre de moteur (1732), la partie de couplage (1736) comportant une région (1738) dont l’épaisseur de paroi est inférieure à la longueur d’un arbre de moteur (1712) au niveau de la partie de maintien d’arbre de moteur (1732). Il est ainsi possible de réduire le poids total de la masse excentrique (1720) tout en augmentant son excentricité. Il est également possible de préserver l’intégrité de la fixation entre la masse (1740) et le porte-masse (1730) lors d’une utilisation prolongée de la masse (1740).
PCT/JP2004/014972 2004-10-08 2004-10-08 Masse excentrique, son procede de fabrication, moteur vibrant et appareil portable WO2006040808A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2004/014972 WO2006040808A1 (fr) 2004-10-08 2004-10-08 Masse excentrique, son procede de fabrication, moteur vibrant et appareil portable
PCT/JP2005/018666 WO2006041045A1 (fr) 2004-10-08 2005-10-07 Masse excentrique, moteur vibrant, appareil portable et procede de fabrication de masse excentrique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2004/014972 WO2006040808A1 (fr) 2004-10-08 2004-10-08 Masse excentrique, son procede de fabrication, moteur vibrant et appareil portable

Publications (1)

Publication Number Publication Date
WO2006040808A1 true WO2006040808A1 (fr) 2006-04-20

Family

ID=36148110

Family Applications (2)

Application Number Title Priority Date Filing Date
PCT/JP2004/014972 WO2006040808A1 (fr) 2004-10-08 2004-10-08 Masse excentrique, son procede de fabrication, moteur vibrant et appareil portable
PCT/JP2005/018666 WO2006041045A1 (fr) 2004-10-08 2005-10-07 Masse excentrique, moteur vibrant, appareil portable et procede de fabrication de masse excentrique

Family Applications After (1)

Application Number Title Priority Date Filing Date
PCT/JP2005/018666 WO2006041045A1 (fr) 2004-10-08 2005-10-07 Masse excentrique, moteur vibrant, appareil portable et procede de fabrication de masse excentrique

Country Status (1)

Country Link
WO (2) WO2006040808A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08251862A (ja) * 1995-03-07 1996-09-27 Takashi Nosaka フライホイール装置とその電動機及びその発電装置
JPH09182363A (ja) * 1995-12-22 1997-07-11 Kesamori Ide 振動用偏心分銅
JPH11127553A (ja) * 1997-10-22 1999-05-11 Mitsumi Electric Co Ltd 振動発生モータ用ローター
JP2000262969A (ja) * 1999-03-15 2000-09-26 Matsushita Electric Ind Co Ltd 偏平振動モータ
JP2001062398A (ja) * 1999-08-27 2001-03-13 Mitsumi Electric Co Ltd 振動発生用モータ

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3958981B2 (ja) * 2002-02-25 2007-08-15 並木精密宝石株式会社 振動モータ用分銅および振動モータ

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08251862A (ja) * 1995-03-07 1996-09-27 Takashi Nosaka フライホイール装置とその電動機及びその発電装置
JPH09182363A (ja) * 1995-12-22 1997-07-11 Kesamori Ide 振動用偏心分銅
JPH11127553A (ja) * 1997-10-22 1999-05-11 Mitsumi Electric Co Ltd 振動発生モータ用ローター
JP2000262969A (ja) * 1999-03-15 2000-09-26 Matsushita Electric Ind Co Ltd 偏平振動モータ
JP2001062398A (ja) * 1999-08-27 2001-03-13 Mitsumi Electric Co Ltd 振動発生用モータ

Also Published As

Publication number Publication date
WO2006041045A1 (fr) 2006-04-20

Similar Documents

Publication Publication Date Title
EP2216119B1 (fr) Procédé de fabrication de turbine
EP2213881A2 (fr) Roue de compresseur et son procédé de fabrication
MX2008005325A (es) Hoja de sierra.
CN107127531B (zh) 叶轮的制造方法
US6222296B1 (en) Electric motor having a stator with an end core part having a different shape than a central core part
WO2006040808A1 (fr) Masse excentrique, son procede de fabrication, moteur vibrant et appareil portable
EP4134553A1 (fr) Impulseur fermé et procédé de production d'un impulseur fermé
EP1424465A1 (fr) Rotor hybride, son procede de fabrication et turbine a gaz
JP2009275513A (ja) 羽根車、羽根車を用いた圧縮機、および羽根車の製造方法
WO2006022010A1 (fr) Poids excentrique, procédé de production, moteur de vibration et appareil portable
JP3958981B2 (ja) 振動モータ用分銅および振動モータ
CN201486843U (zh) 一种混凝土泵的耐磨部件和具有该耐磨部件的混凝土泵
JP2004249441A (ja) ツールホルダ
JP2001129479A (ja) 振動モータ用偏心分銅
WO2006109365A1 (fr) Poids excentrique et son procede de fabrication, moteur vibrant, dispositif mobile
WO2006049144A1 (fr) Poids excentrique, moteur a vibration, appareil portable, et procede pour produire un poids excentrique
JP3006321U (ja) ペジャー用モータの振動発生部
JP4037165B2 (ja) ハードディスクドライブ用キャリッジ
JP2002273344A (ja) マイクロ振動モータ用偏心ウェイト及びその取り付け方法
CN213671349U (zh) 模具
JP3633074B2 (ja) 小型無線呼び出し機の振動発生装置用振動子
JPH11123364A (ja) 超音波ホーン
JP3706239B2 (ja) 超音波ホーン
JP6004532B2 (ja) サイジング用コア金型
JPH0865948A (ja) ペジャー用モータの振動発生部

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP