WO2006048929A1 - 偏心分銅、振動モータ及び携帯機器 - Google Patents
偏心分銅、振動モータ及び携帯機器 Download PDFInfo
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- WO2006048929A1 WO2006048929A1 PCT/JP2004/016307 JP2004016307W WO2006048929A1 WO 2006048929 A1 WO2006048929 A1 WO 2006048929A1 JP 2004016307 W JP2004016307 W JP 2004016307W WO 2006048929 A1 WO2006048929 A1 WO 2006048929A1
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- weight
- eccentric
- eccentric weight
- metal member
- support
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- 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. 17 is a diagram for explaining a conventional vibration motor and an eccentric weight.
- Fig. 17 (a) is a perspective view of a vibration motor
- Fig. 17 (b) is a cross-sectional view of an eccentric weight cut along a plane perpendicular to the motor axis
- Fig. 17 (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. 18 is a view for explaining another conventional eccentric weight.
- Fig. 18 (a) is a front view of the eccentric weight
- Fig. 18 (b) is an AA sectional view of Fig. 18 (a)
- Fig. 18 (c) is a front view of the component parts
- Fig. 18 ( d) is a cross-sectional view taken along the line BB in FIG. 18 (c).
- part of the motor body 1910 is also shown! /.
- another conventional eccentric weight 1920 has a cylindrical weight having a motor shaft holding hole 1932 for holding the motor shaft 1 912 of the motor body 1910 and also having a low specific gravity metal force. It consists of a copper support 1930 and an approximately half-pipe-shaped weight 1940 that also has a high specific gravity metal force (see, for example, Patent Document 1.) o Because the weight 1940 also has a high specific gravity metal force, the eccentric weight 1920 The center of gravity of the motor shaft holding hole 1932 is arranged at a position where the center axial force is also separated. As a result, 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 in which the reliability of bonding between a weight and a 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.
- An eccentric weight of the present invention has a weight having a high specific gravity metal force, a weight holding portion for holding the weight by an elastic force, and a motor shaft holding portion for holding a motor shaft,
- the eccentric weight is supported by a weight made of a high specific gravity metal and a weight made of a metal having a lower specific gravity than the high specific gravity metal constituting the weight.
- the eccentric weight with the body reduces the total weight of the eccentric weight and The amount of eccentricity 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 is held by the weight holding portion by an elastic force, the weight is reduced when the vibration motor (and the eccentric weight) is used for a long time. It is suppressed that the reliability of joining with a weight support body falls. For this reason, a vibration motor with high long-term reliability can be configured by using such an eccentric weight.
- a weight support that has been cured through a step of plastically deforming a thin metal member into a predetermined shape is used as the weight support.
- the amount of the material constituting the weight support can be made extremely small while maintaining a sufficient 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 weight and less power consumption.
- the size of the inner peripheral portion of the weight holding portion before holding the weight is preferably smaller than the size of the outer peripheral portion of the weight.
- the inner diameter of the motor shaft holding portion is smaller than the outer diameter of the motor shaft.
- the thin metal member is cured by winding the thin metal member around the weight. This makes it possible to produce an eccentric weight in a very simple manner.
- the vibration motor it is preferable to assemble the vibration motor at the same time when manufacturing the eccentric weight. That is, a thin sheet metal member is wound around a weight and a motor shaft. It is preferable to cure the member. This makes it possible to manufacture an eccentric weight and a vibration motor by a very simple method.
- the weight support is a weight support manufactured by plastically deforming a thin metal member into a predetermined shape and then performing a hardening process. It is preferable.
- the thickness of the thin metal member is preferably in the range of 0.05 mm to 0.5 mm.
- the thickness of the thin metal member is less than 0.05 mm, the strength required for the weight support may not be obtained, and if the thickness of the thin metal member exceeds 0.5 mm, This is because if the total weight of the weight support is reduced and the eccentric amount of the eccentric weight can be further increased, the effect may not be obtained. From these viewpoints, the thickness of the thin metal member is more preferably in the range of 0.08 mm-0.3 mm.
- the thin metal member is provided with a predetermined opening.
- 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 eccentric weight of the present invention has a weight having a high specific gravity metal force, a weight holding portion for holding the weight by an elastic force, and a motor shaft holding portion for holding the motor shaft,
- An eccentric weight comprising a weight support made of a metal having a specific gravity lower than that of a high specific gravity metal constituting the weight, the weight support being subjected to a process of plastically deforming the linear metal member into a predetermined shape. It is a cured weight support.
- the eccentric weight is made of a high specific gravity metal.
- Eccentric weights with a weight and a weight support that is made of a metal that has a lower specific gravity than the high-density metal that constitutes the weight are reduced to reduce the total weight of the eccentric weight and reduce the amount of eccentricity in the eccentric weight. Can be bigger. 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 that has been cured through the step of plastically deforming the linear metal member into a predetermined shape is used as the weight support.
- the amount of the material constituting the weight support can be made extremely small while maintaining the degree.
- 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 even less power consumption.
- the size of the inner peripheral portion of the weight holding portion before holding the weight is set to be smaller than the size of the outer peripheral portion of the weight. It is preferable.
- the weight can be favorably held in the weight holding portion by the elastic force.
- the inner diameter of the motor shaft holding portion is smaller than the outer diameter of the motor shaft.
- the linear metal member is cured by winding the linear metal member around the weight. This makes it possible to produce an eccentric weight in a very simple manner.
- the weight support is a weight support manufactured by plastically deforming a linear metal member into a predetermined shape and then performing a hardening treatment. Preferably there is.
- the diameter of the linear metal member is preferably in the range of 0.07 mm to 0.6 mm.
- the diameter of the linear metal member is less than 0.07 mm, the strength required for the weight support may not be obtained. If the diameter of the linear metal member exceeds 0.6 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 diameter of the linear metal member is more preferably in the range of 0.1 mm to 0.4 mm.
- the linear metal member has a flat, oval or rectangular cross-sectional shape, and the major axis direction of the cross-section is the motor shaft. It is preferable that they are parallel.
- “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 is not necessarily held in the weight holding portion over the entire length of the weight.
- the thin metal member or the linear metal member is preferably 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 or a linear 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. ).
- 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 reliability of holding the motor shaft in the motor shaft holding portion is lowered.
- 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.
- a material constituting the weight for example, tungsten, tungsten alloy, etc.
- tungsten, tungsten alloy, etc. Is expensive, and there is a problem that it is not easy to reduce the manufacturing cost of the eccentric weight.
- martensitic stainless steel is less expensive than tungsten and tungsten alloys. Therefore, by constructing a weight support with such a relatively inexpensive martensitic stainless steel, the manufacture of eccentric weight is possible. Costs can be reduced.
- the quenching process gives a Vickers hardness (Hv) of about 300-600.
- the thin metal member or the linear metal member preferably has a metal force having age hardening.
- the weight support can be easily manufactured by performing precipitation hardening after the plastic deformation of the thin metal member or the linear metal member into a predetermined shape.
- 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 effects as in the case of the martensitic stainless steel described in (11) above are 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. In this case, a precipitation hardening process at 420 ° C for 2 hours gives a Vickers hardness (Hv) of about 300-450.
- the age-hardening metal is a beryllium copper alloy
- the effects of easy plastic deformation and excellent mechanical strength after precipitation hardening are obtained.
- An example of the beryllium copper alloy is a beryllium copper alloy containing 1.5% to 3.5% beryllium. In this case, a Vickers hardness (Hv) of about 200-350 is obtained by precipitation hardening for 2 hours at 320 ° C-330 ° C.
- Hv Vickers hardness
- Even when the age-hardening metal is a nickel manganese copper alloy (nickel manganese white), the effects of easy plastic deformation and excellent mechanical strength after precipitation hardening can be obtained.
- the nickel manganese copper alloy is exemplified by a nickel manganese copper alloy containing about 20% nickel and about 20% manganese.
- a precipitation hardening treatment at 400 ° C for 2 hours gives a Vickers hardness (Hv) of about 420.
- Precipitation hardening titanium alloys include titanium alloys (Ti 6A1-4V) containing about 6% aluminum and about 4% vanadium, and titanium alloys containing about 6% aluminum and about 2% vanadium (Ti 6A1— 2V) is exemplified. In this case, a value of about 300 is obtained as a Vickers hardness (Hv) by precipitation hardening for 2 hours at 450 ° C.
- the weight is selected from the group consisting of tungsten, 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 require 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. Can be used. In addition, it is possible to use 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. In addition, when the cross-sectional shape of the weight is a circle, a sintered body that also has a round bar force can be used as it is cut short.
- the weight is It is preferable to have a plane-symmetric shape having a predetermined first plane including the central axis of the motor shaft holding portion as a plane of symmetry.
- the weight can be inserted into any of the end side force weight holding portions, so the degree of freedom in 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.
- a vibration motor of 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.
- the weight support body holds the motor shaft at a position eccentric with respect to the weight in a direction in which the distance from the motor body approaches. It is preferable.
- the vibration motor of the present invention includes a weight having a high specific gravity metal force, a weight holding portion for holding the weight, and a motor shaft holding portion for holding the motor shaft, and constitutes the weight.
- a vibration motor having an eccentric weight having a weight support made of a metal having a specific gravity lower than that of a high specific gravity metal and a motor body, wherein the weight support is relative to the weight.
- the motor shaft is held at a position eccentric in the direction in which the distance from the motor body approaches.
- the vibration motor of the present invention even if the weight support is not a weight support that has been cured through the step of plastically deforming the thin metal member or the linear metal member into a predetermined shape, the motor Since the distance between the bearing of the main body and the motor weight holding portion of the eccentric weight is reduced, the eccentric weight rotates more stably, the vibration stress reduction due to the deflection of the motor shaft is suppressed, and the vibration characteristics of the vibration motor are improved.
- a portable device of the present invention includes the vibration motor according to any one of (16) to (18).
- the portable device of the present invention it is possible to obtain a necessary amount of vibration with light weight and low power consumption, high reliability for a long time, a vibration motor or a vibration motor having excellent vibration characteristics. Therefore, it is possible to obtain a necessary amount of vibration with light weight and low power consumption, and to be a portable device with high reliability for a long time or a portable device having excellent vibration characteristics.
- FIG. 1 is a view shown for explaining an eccentric weight according to the 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 view for explaining an eccentric weight according to the 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 the eighth embodiment and an eccentric weight according to the ninth embodiment.
- FIG. 11 is a view for explaining an eccentric weight according to the tenth embodiment and an eccentric weight according to the eleventh embodiment.
- FIG. 12 is a view for explaining an eccentric weight according to the twelfth embodiment.
- FIG. 13 is a view for explaining an eccentric weight according to a thirteenth embodiment.
- FIG. 14 is a view for explaining an eccentric weight according to a fourteenth embodiment.
- FIG. 15 is a view for explaining the eccentric weight according to the fifteenth embodiment and the eccentric weight according to the sixteenth embodiment.
- FIG. 16 is a view for explaining a vibration motor including an eccentric weight according to the seventeenth embodiment.
- FIG. 17 is a view for explaining a conventional vibration motor and an eccentric weight.
- FIG. 18 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 view of the eccentric weight according to Embodiment 1 from the front
- Fig. 1 (b) is a view of the eccentric weight according to Embodiment 1 from the side.
- FIG. 1 is a view of an eccentric weight according to Embodiment 1 as viewed from the bottom surface
- FIG. 1 (d) is a cross-sectional view taken along line AA in FIG. 1 (a)
- FIG. 1 (e) is related to Embodiment 1.
- FIG. 1 (f) is a perspective view of the eccentric weight according to the first embodiment when viewed from an angular force different from that of FIG. 1 (e).
- FIG. 2 is a view for explaining the method of manufacturing the eccentric weight according to the first embodiment.
- Fig. 2 (a)-Fig. 2 (g) are diagrams showing each step.
- the eccentric weight 120 includes a weight 140 having a substantially fan-shaped cross section, and a weight support 130.
- 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 130 has a weight holding part 134 for holding the weight 140 by elastic force and a motor shaft holding part 132 for holding the motor shaft 112 (see FIG. 3).
- 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 includes the weight 140 made of a high specific gravity metal and the weight having a lower specific gravity than that of the high specific gravity metal constituting the weight 140. Since the eccentric weight 120 including the support 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 vibration motor (and the eccentric weight 120) is used for a long time. It is suppressed that the reliability of joining of the weight 140 and the weight support 130 is lowered. Therefore, by using such an eccentric weight 120, it is possible to configure a vibration motor with high long-term reliability.
- the thin plate metal member 130a is plastically deformed into a predetermined shape as a weight support, and then subjected to a hardening process. Since the manufactured weight support 130 is used, the amount of the material constituting the weight support can be made extremely small while maintaining the required strength. As a result, the total weight of the eccentric weight 120 can be 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 size of the inner peripheral portion of the weight holding portion 134 before holding the weight 140 is set smaller than the size of the outer peripheral portion of the weight 140. deep.
- the weight 140 can be favorably held by the weight holding portion 134 by the elastic force.
- the inner diameter of the motor shaft holding portion 132 is made smaller than the outer diameter of the motor shaft 112 (see FIG. 3).
- the vibration motor 100 see FIG. 3 (a)
- the motor shaft 112 is inserted into the motor shaft holding portion 132 in a state where the inner diameter is increased.
- the motor shaft holding part 132 can be favorably held by the elastic force 112.
- the weight support 130 is the weight 140.
- the weight 140 In order to hold the weight 140, the weight 140 is surrounded from the outer periphery, and this portion is referred to as a weight holding portion 134.
- the weight support 130 has a shape that surrounds the outer peripheral force of the motor shaft 112 in order to hold the motor shaft 112. However, in the eccentric weight 120 according to the first embodiment, this portion is held by the motor shaft. It is called part 132.
- the weight 140 is held by the weight holding portion 134 over a half circumference.
- “more than half a circle” means more than a half 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 in the weight holding portion over the entire longitudinal direction of the weight 140, but as in the case of the eccentric weight 120 according to the first embodiment, It is not always necessary for the weight 140 to be held by the weight holding part 134 over the entire length of the weight 140.
- the thickness of the thin metal member 130a is 0.1 mm.
- the total weight of the weight support 130 can be reduced and the eccentric amount of 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 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 weight 140 has a weight support 130 in a length (2 mm) half 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 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 (d).
- 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 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 motor shaft holding portion 132 means that the central axis of motor shaft 112 is located when motor shaft holding portion 132 holds motor shaft 112 (see FIG. 3). It is the axis that will be.
- 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 also 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 Can be integrated more firmly, and 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. The 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 a relatively high corrosion resistance and is difficult to crack, so that 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
- the weight 140 has a tungsten alloy strength. 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 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 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. become able to.
- the eccentric weight 120 according to Embodiment 1 can be manufactured, for example, by the following method.
- a thin metal member 130a having a martensitic stainless steel strength is prepared (FIG. 2 (a)).
- the line indicated by the symbol XX is an imaginary line that serves as a reference during processing.
- one end E of the thin metal member 130a is rounded by plastic working to form a portion corresponding to the motor shaft holding portion 132 (FIG. 2 (b)).
- a portion corresponding to the data shaft holding portion 132 is formed to form a member 130b having substantially the same shape as the weight support 130 (FIG. 2 (e)).
- 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 (f)).
- a tungsten alloy round bar having a cross section larger than that of the weight 140 is prepared.
- the weight 140 is elastically held by the weight holding part 134, so that the vibration motor (and the eccentric weight 120) is used for a long time. In addition, it is possible to suppress a decrease in the reliability of bonding between the weight 140 and the weight support 130.
- FIG. 3 is a view for explaining the vibration motor according to the first embodiment.
- Fig. 3 (a) is a perspective view of the vibration motor according to Embodiment 1
- Fig. 3 (b) is a view of the vibration motor according to Embodiment 1
- Fig. 3 (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. Equipped with an excellent eccentric weight 120 that prevents the reliability of the connection between the weight and the weight support when the motor is used for a long time. Yes. 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. 4 is a view for explaining the eccentric weight according to the second embodiment.
- Fig. 4 (a) is a front view of the eccentric weight according to Embodiment 2
- Fig. 4 (b) is a side view of the eccentric weight according to Embodiment 2
- Fig. 4 (c) FIG. 4 is a view showing a thin metal member used when manufacturing a weight support in the second embodiment.
- the eccentric weight 220 according to the second embodiment has a structure that is very similar to 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 body 230 as shown in FIG. That is, in the eccentric weight 220 according to the second embodiment, the thin metal plate 230a that is shorter than the thin metal member 130a used in the first embodiment is used as the thin metal member used when the weight support 230 is manufactured. I am going to use it.
- the motor shaft holding part 232 is made of a single piece of a thin metal member 230a.
- FIG. 5 is a view for explaining the eccentric weight according to the third embodiment.
- Fig. 5 (a) is a view of the eccentric weight according to Embodiment 3 as seen from the front
- Fig. 5 (b) is a view of the eccentric weight according to Embodiment 3 as seen from the side, as shown in Fig. 5 (c).
- FIG. 5 is a view showing a thin metal member used when manufacturing a weight support in Embodiment 3.
- the eccentric weight 320 according to the third embodiment has a structure that is very similar to 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 sheet metal member used when manufacturing the weight support 330 is narrower on the other end E side of the sheet metal member 130a used in the first embodiment. Territory The sheet metal member 330a having an area 330a2 and having an elongated hole 330al in the vicinity of one end is used. The narrow region 330a2 is bent after passing through the long hole 330al.
- FIG. 6 is a view for explaining the eccentric weight according to the fourth embodiment.
- Fig. 6 (a) is a view of the eccentric weight according to Embodiment 4 as viewed from the front
- Fig. 6 (b) is a view of the eccentric weight according to Embodiment 4 as viewed from the side, as shown in Fig. 6 (c).
- FIG. 6 is a view showing a thin metal member used when manufacturing a weight support in Embodiment 4.
- the eccentric weight 420 according to the fourth embodiment has a structure that is very similar to the eccentric weight 320 according to the third embodiment. However, the eccentric weight 420 according to the fourth embodiment is different from the eccentric weight 320 according to the third embodiment in the structure of the weight support body 430 as shown in FIG. That is, in the eccentric weight 420 according to the fourth embodiment, the narrow region 430a2 of the thin metal member 330a used in the third embodiment is further elongated as a thin metal member used in manufacturing the weight support 430. The thin metal member 430a is used. The narrow region 430a2 is wound once around the motor shaft after passing through the long hole 430al. As a result, the motor shaft holding part 432 is constituted by a thin sheet metal member 430a wound twice.
- FIG. 7 is a view for explaining the eccentric weight according to the fifth embodiment.
- Fig. 7 (a) is a diagram of the eccentric weight according to Embodiment 5 as viewed from the front
- Fig. 7 (b) is a diagram of the eccentric weight according to Embodiment 5 as viewed from the side.
- Fig. 7 (c) FIG. 6 is a view showing a thin metal member used when manufacturing a weight support in the fifth embodiment.
- the eccentric weight 520 according to the fifth embodiment is slightly different in structure from the eccentric weight 120-420 according to the first to fourth embodiments. That is, the eccentric weight 520 according to the fifth embodiment has a structure in which the motor shaft holding portion 532 and the weight holding portion 534 are connected by a single connecting portion.
- FIG. 8 is a view for explaining the eccentric weight according to the sixth embodiment.
- Fig. 8 (a) is a diagram of the eccentric weight according to Embodiment 6 as viewed from the front
- Fig. 8 (b) is a diagram of the eccentric weight according to Embodiment 6 as viewed from the side.
- FIG. 8 (c) FIG. 10 is a view showing a thin metal member used when manufacturing a weight support in Embodiment 6.
- the eccentric weight 620 according to the sixth embodiment includes an eccentric weight according to the first to fifth embodiments as shown in FIG.
- the structure is slightly different from that of the weight 120-520. That is, in the eccentric weight 620 according to the sixth embodiment, the end on the motor shaft side of the weight 640 is a flat surface, and the weight 640 is held by the weight holding portion 634 over the entire circumference.
- the narrow region 630a2 is folded after passing through the long hole 630al.
- the motor shaft holding portion 632 is configured by a single metal sheet 630a wound in a single layer.
- FIG. 9 is a view for explaining the eccentric weight according to the seventh embodiment.
- Fig. 9 (a) is a view of the eccentric weight according to Embodiment 7 as viewed from the front
- Fig. 9 (b) is a view of the eccentric weight according to Embodiment 7 as viewed from the side, as shown in Fig. 9 (c).
- FIG. 8 is a view showing a thin metal member used when manufacturing a weight support in Embodiment 7.
- the eccentric weight 720 according to the seventh embodiment has a slightly different structure from the eccentric weight 120-620 according to the first to sixth embodiments. That is, in the eccentric weight 720 according to the seventh embodiment, the weight 740 has a circular cross section.
- the motor shaft holder 732 is made of a thin metal plate 730a that is double-layered! RU
- FIG. 10 is a view for explaining the eccentric weight according to the eighth embodiment and the eccentric weight according to the ninth embodiment.
- FIG. 10 (a) is a view of the eccentric weight according to the eighth embodiment as viewed from the front
- FIG. 10 (b) is a perspective view of the weight support used for the eccentric weight according to the eighth embodiment.
- FIG. 10 (d) is a view of the eccentric weight according to the ninth embodiment as viewed from the front.
- the eccentric weight 820 according to the eighth embodiment and the eccentric weight 920 according to the ninth embodiment include the eccentric weight 720 according to the seventh embodiment, as shown in FIGS. 10 (a) and 10 (d).
- the number of weights is different. That is, the eccentric weight 820 according to the eighth embodiment includes two weights 840, and the eccentric weight 920 according to the ninth embodiment includes three weights 940.
- FIG. 11 is a view for explaining the eccentric weight according to the tenth embodiment and the eccentric weight according to the eleventh embodiment.
- FIG. 11 (a) is a perspective view of the eccentric weight according to the tenth embodiment
- FIG. 1Kb) is a perspective view of the eccentric weight according to the eleventh embodiment.
- the eccentric weight 1020 according to the tenth embodiment and the eccentric weight 1120 according to the eleventh embodiment are the same as the eccentric weight 120 according to the first embodiment, as shown in FIGS. 11 (a) and 11 (b). Weights provided
- the structure of the support is different. That is, the eccentric weight 1020 according to the tenth embodiment has a large number of open ends.
- a weight support 1030 having a mouth is provided, and an eccentric weight 1120 according to the eleventh embodiment includes a weight support 1130 having one elongated opening.
- Embodiments 2-5, 10 and 1U such as weights 220-1, 520, 1020, 1120, weight support 230-530, 1030, 1130 has a structure according to Embodiment 1.
- the eccentric weight 620-920 according to the embodiment 6-9 is different from the case of the eccentric weight 120 according to the embodiment 1 in the structure of the weight 640-940 and the structure of the weight support body 630-930.
- the eccentric weight is an eccentric weight 220-1120 having a weight made of a high specific gravity metal and a weight support having a lower specific gravity than that of the high specific gravity metal constituting the weight, As in the case of the eccentric weight 120 according to 1, the total weight of the eccentric weights 220-1120 can be reduced and the amount of eccentricity in the eccentric weights 220-1120 can be increased. For this reason, by using such an eccentric weight 220-1120, 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 is held by the weight holding portion by the elastic force, so that it is the same as the case of the eccentric weight 120 according to the embodiment 1. Further, when the eccentric weight 220-1120 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 220-1120, a vibration motor with high long-term reliability can be configured.
- the eccentric weight 220-1120 according to Embodiments 2-11, a weight support manufactured by subjecting a thin plate metal member to plastic deformation into a predetermined shape and then performing a hardening treatment as the weight support. Therefore, the amount of the material constituting the weight support can be made extremely small while maintaining the required strength. As a result, the total weight of the eccentric weights 220-1120 can be reduced, and the amount of eccentricity in the eccentric weights 220-1120 can be further increased. For this reason, by using such an eccentric weight 220-1120, it is possible to configure a vibration motor that can obtain a necessary vibration amount with lighter weight and less power consumption.
- the material constituting the weight support body while maintaining the required strength is provided. Can be further reduced. This makes the eccentric weight 1
- the total weight of 020 and 1120 can be further reduced, and the amount of eccentricity in the eccentric weights 1020 and 1120 can be further increased. Therefore, by using such eccentric weights 1020, 1120, it is possible to configure a vibration motor that can obtain a necessary vibration amount with lighter and less power consumption.
- the weights 840 and 840 are not held by the weight holding portion 834 for more than half a circumference. However, in this case, one of the weights 840 will also receive a reaction force from the other weight 840, so the reliability of the connection between the weights 840, 840 and the weight support 830 when the vibration motor is used for a long time. Is reduced.
- FIG. 12 is a view for explaining the eccentric weight according to the twelfth embodiment.
- FIG. 12 (a) is a view of the eccentric weight according to the twelfth embodiment as viewed from the front force
- FIG. 12 (b) is a perspective view of the eccentric weight according to the twelfth embodiment as viewed from the bottom side.
- the eccentric weight 1220 according to the twelfth embodiment is different in the structure of the weight support 1230 from the eccentric weight 120-1120 according to the first embodiment 11-11. That is, in the eccentric weight 1220 according to the twelfth embodiment, the weight support 1230 is a weight support manufactured by subjecting a linear metal member to plastic deformation and then performing a hardening treatment.
- FIG. 13 is a view for explaining the eccentric weight according to the thirteenth embodiment.
- FIG. 13 (a) is a view of the eccentric weight according to the thirteenth embodiment when the front force is also seen
- FIG. 13 (b) is a perspective view of the eccentric weight according to the thirteenth embodiment when the bottom side force is seen.
- the eccentric weight 1320 according to the thirteenth embodiment is different from the eccentric weight 120-1220 according to the first embodiment 12 in the structure of the weight support 1330. That is, in the eccentric weight 1320 according to the thirteenth embodiment, the weight support 1330 is a weight support manufactured by subjecting a linear metal member to plastic deformation and then performing a hardening treatment.
- the eccentric weight 1320 according to the thirteenth embodiment is slightly different from the case of the eccentric weight 1220 according to the twelfth embodiment in the manner of winding the linear metal member. That is, in the eccentric weight 1220 according to the twelfth embodiment, as shown in FIG.
- the eccentric weight 1320 according to the thirteenth embodiment has a winding method in which the winding density in FIG. 13B is the same as the winding density in the weight holding portion 1234, as shown in FIG.
- the winding method is such that the winding density in the motor shaft holder 1332 is smaller than the winding density in the weight holder 1334.
- FIG. 14 is a view for explaining the eccentric weight according to the fourteenth embodiment.
- FIG. 14 (a) is a view of the eccentric weight according to the fourteenth embodiment when viewed from the front force
- FIG. 14 (b) is a perspective view of the eccentric weight according to the fourteenth embodiment when viewed from the bottom side.
- the eccentric weight 1420 according to the fourteenth embodiment is different from the eccentric weight 1220 according to the twelfth embodiment and the eccentric weight 1320 according to the thirteenth embodiment in the cross-sectional shape of the linear metal member. That is, in the eccentric weight 1420 according to the fourteenth embodiment, the linear metal member has a rectangular cross-sectional shape, and the cross-sectional major axis direction is parallel to the motor shaft.
- FIG. 15 is a view for explaining the eccentric weight according to the fifteenth embodiment and the eccentric weight according to the sixteenth embodiment.
- FIG. 15 (a) is a view of the eccentric weight according to the fifteenth embodiment when viewed from the front
- FIG. 15 (b) is a view of the eccentric weight according to the sixteenth embodiment as viewed from the front.
- the eccentric weight 1520 according to the embodiment 15 and the eccentric weight 1620 according to the embodiment 16 include the eccentric weight 1220 according to the embodiment 12-14 as shown in FIGS. 15 (a) and 15 (b).
- the number of weights provided differs from 1420. That is, the eccentric weight 1520 according to the fifteenth embodiment includes two weights 1540, and the eccentric weight 1620 according to the sixteenth embodiment includes three weights 1640.
- the method of winding the linear metal members constituting the weight supports 1530 and 1630 is also different.
- the eccentric weights 1220-1620 according to the embodiment 12-16 are different from the eccentric weights 120-1120 according to the embodiments 11-11 in that the structure of the weight support 1230-1 1630 is different. Because the weight is an eccentric weight 1220-1620 with a weight 1240-1640 that also has a high specific gravity and a weight support 1230-1630 that is made of a metal with a specific gravity lower than that of the high specific gravity that constitutes the weight 1240-1640, As in the case of the eccentric weights 120-1120 according to Embodiment 1-11, the total weight of the eccentric weights 1220-1620 can be reduced, and the amount of eccentricity in the eccentric weights 1220-1620 can be increased. Therefore, by using such an eccentric weight 122 0-1620, a large amount of vibration can be obtained with light weight and low power consumption. A vibration motor can be configured.
- the eccentric weight 1220-1620 since the weight 1240-1640 is held by the weight holding portion 1234-1634 by the elastic force, according to the embodiment 1-11.
- the eccentric weight 120-1120 when the eccentric weight 1220-1620 is used for a long period of time, it is possible to suppress a decrease in the reliability of bonding between the weight 1240-1640 and the weight support 1230-1630. Therefore, by using such an eccentric weight 1220-1620, a vibration motor with high long-term reliability can be configured.
- the weight manufactured by subjecting the linear metal member to plastic deformation into a predetermined shape and then performing a hardening treatment as the weight support since the support 1230-1630 is used, the amount of the material constituting the weight support 1230-1630 can be made extremely small while maintaining the required strength. As a result, the total weight of the eccentric weights 1220-1620 can be reduced, and the amount of eccentricity in the eccentric weights 1220-1620 can be further increased. Therefore, by using such an eccentric weight 1220-1620, it is possible to configure a vibration motor that can obtain a necessary vibration amount with lighter and less power consumption.
- the size of the inner peripheral portion of the weight holding portion 1234-1634 before holding the weight 1240-1640 is the same as that of the outer peripheral portion of the weight 1240-1640. It is supposed to be smaller than the size.
- the weight 1240-1640 can be favorably held by the weight holding part 1234-1634 by the elastic force. It is out.
- the inner diameter of the motor shaft holding portion 1232-1632 is made smaller than the outer diameter of the motor shaft.
- the linear metal portion The diameter of the material is 0.1 mm (arrangement pitch is 0.2 mm). Therefore, it is possible to reduce the total weight of the weight support bodies 1230 and 1330 while maintaining the strength required for the weight support bodies 1230 and 1330 and further increase the amount of eccentricity in the eccentric weights 1220 and 1320. An effect is obtained.
- the linear metal member has a flat, oval or rectangular cross-sectional shape, and the cross-sectional major axis direction is flat with the motor shaft. Line. For this reason, by increasing the cross-sectional major axis while keeping the cross-sectional minor axis of the linear metal member short, the effect that the number of windings can be reduced while maintaining the necessary strength as a weight support is also obtained. As a result, the process for manufacturing the eccentric weight 1420 can be simplified, and the manufacturing cost of the eccentric weight 1420 can be reduced.
- FIG. 16 is a view for explaining the vibration motor including the eccentric weight according to the seventeenth embodiment.
- FIG. 16 (a) is a view showing a vibration motor 1700 provided with an eccentric weight 1720 according to Embodiment 17
- FIG. 16 (b) is a view showing a vibration motor 100 provided with an eccentric weight 120 according to Embodiment 1. It is.
- the eccentric weight 1720 according to the seventeenth embodiment has basically the same structure as the eccentric weight 120 according to the first embodiment. However, in the eccentric weight 1720 according to the seventeenth embodiment, as shown in FIG.16 (a), the weight support 1730 is decentered in the direction in which the distance from the motor body 1710 approaches the weight 1740, Hold the motor shaft 1712.
- the vibration motor 1700 using the eccentric weight 1720 according to the embodiment 17 the distance between the bearing 1714 of the motor main body 1710 and the motor shaft holding portion 1732 of the eccentric weight 1720 is reduced, so that the eccentric weight 1720 is As compared with the vibration motor 100 according to the first embodiment, the vibrations are more stably rotated, and the decrease in vibration stress due to the deflection of the motor shaft 112 is suppressed, and the vibration characteristics of the vibration motor are improved.
- the eccentric weight 120-1720 of each of the above embodiments is manufactured by subjecting a thin plate metal member or a linear metal member to a predetermined shape as a weight support, followed by a hardening treatment.
- the force using the weight support 130-1730 The present invention is not limited to this.
- a weight support manufactured with a metal plate or a linear metal member that is plastically deformed into a predetermined shape and is not subjected to hardening treatment can be used. As described above, even when the hardening treatment is not performed, the thin metal member is linearly deformed into a predetermined shape, so that the thin metal member is hardened to some extent. It is out.
- 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.
- the force using martensitic stainless steel as the thin metal member or the linear metal member is not limited to this.
- a metal having quenching hardenability other than martensitic stainless steel can be used.
- a metal having age-hardening properties 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 age-hardening metal.
- a sintered body having a round bar force 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 having the same cross-sectional shape as the weight cross-section (for example, a circle, an ellipse, a fan shape, etc.) is cut short.
- the cross-sectional shape of the weight is a circle, for example, a sintered body made of a round bar can be used as it is cut short.
- the size of the inner periphery of the weight holding portion 134-1134 before holding the weight 140-1140 is the same as that of the weight 140-1140.
- a weight holder that is smaller than the size of the outer perimeter and that has the inner perimeter expanded. 13
- the present invention is not limited to this. It is also preferable to cure the thin metal member while the thin metal member is wrapped around the weight. This makes it possible to manufacture an eccentric weight by a very simple method.
- the sheet metal member can be cured with the sheet metal member wound around the weight and Z or the motor shaft.
- the size of the inner peripheral portion of the weight holding portion 1234-1634 before holding the weight 1240-164 0 is defined as the weight 1240-164. It is assumed that the weight is held in the weight holding part by inserting the weight 1240-1640 into the weight holding part 1234-1634 in a state where the inner peripheral part is expanded by setting it smaller than the size of the outer peripheral part of 0.
- the present invention is not limited to this. It is also preferable that the linear metal member is hardened while the linear metal member is wound around the weight. This makes it possible to manufacture an eccentric weight by a very simple method.
- the linear metal member may be cured in a state where the linear metal member is wound around the weight and Z or the motor shaft.
- the vibration motor of the present invention can also be suitably used for a remote control of a power game machine, a pachinko operating unit, an electric toothbrush and the like suitably used for portable devices such as mobile phones and PDAs.
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- Apparatuses For Generation Of Mechanical Vibrations (AREA)
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PCT/JP2005/020064 WO2006049144A1 (ja) | 2004-11-04 | 2005-11-01 | 偏心分銅、振動モータ、携帯機器及び偏心分銅の製造方法 |
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JP2002079179A (ja) * | 2000-09-11 | 2002-03-19 | Mabuchi Motor Co Ltd | 振動発生用小型モータ |
JP2003245680A (ja) * | 2002-02-26 | 2003-09-02 | Hitachi Housetec Co Ltd | 槽内に濾過ユニットを配した汚水浄化槽 |
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JP2002079179A (ja) * | 2000-09-11 | 2002-03-19 | Mabuchi Motor Co Ltd | 振動発生用小型モータ |
JP2003245680A (ja) * | 2002-02-26 | 2003-09-02 | Hitachi Housetec Co Ltd | 槽内に濾過ユニットを配した汚水浄化槽 |
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