Vibration motor and haptic device

Abstract

To provide a vibration motor which can be down-sized.SOLUTION: A vibration motor 10 has a stationery part 1, and a movable part 2 which can vibrate along a central axis J that extends in a vertical direction with respect to the stationery part 1. The stationery part 1 has a bearing part 12 which extends along the central axis J and supports the movable part 2 so as to be capable of vibrating the movable part along the central axis J, and a coil 13 which is formed in such a manner that a conductive wire is wound around the central axis J. The bearing part 12 has a first region part 121 with a coil inner region part 121A which is located inward in a radial direction of the coil 13.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a vibration motor and a haptic device. [Background technology]

[0002] Conventionally, various devices such as mobile devices such as smartphones are equipped with vibration motors as vibration generating devices. Vibration motors are used for purposes such as notifying users of incoming calls or alarms, or providing haptic feedback in human interfaces.

[0003] The vibration motor has a housing, a coil, an elastic member, and a movable part. The movable part has a magnet. The movable part and the housing are connected by an elastic member. The movable part vibrates when a magnetic field is generated by passing electricity through the coil (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 8-65990 Summary of the Invention [Problem to be solved by the invention]

[0005] Here, the direction perpendicular to the vibration direction of the movable part is the radial direction, and when the movable part and the coil are arranged directly facing each other in the radial direction with a gap in between, it is necessary to make the gap larger to a certain extent, which prevents the vibration motor from being made smaller in the radial direction.

[0006] In view of the above circumstances, an object of the present invention is to provide a vibration motor that can be made compact. [Means for solving the problem]

[0007] An exemplary vibration motor of the present invention includes a stationary part and a movable part capable of vibrating along a central axis extending in a vertical direction relative to the stationary part. The stationary part includes a bearing part extending along the central axis and supporting the movable part so that the movable part can vibrate along the central axis, and a coil formed by winding a conductor around the central axis. The bearing part includes a first region having an inner coil region located radially inward of the coil. Effect of the Invention

[0008] According to the exemplary vibration motor of the present invention, the vibration motor can be made compact. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view of a vibration motor according to an exemplary embodiment of the present invention. [Diagram 2] FIG. 2 is a vertical cross-sectional perspective view of a vibration motor according to an exemplary embodiment of the present invention. [Diagram 3] FIG. 3 is a vertical cross-sectional view of a vibration motor according to an exemplary embodiment of the present invention. [Figure 4] FIG. 4 is a perspective view showing a configuration relating to electrical connection between the substrate and the coil. [Diagram 5] FIG. 5 is a vertical sectional view showing a partial configuration of a bearing portion according to a modified example. [Figure 6] FIG. 6 is a perspective view showing a lower end portion of a bearing portion according to another modified example. [Figure 7] FIG. 7 is a diagram showing a schematic diagram of a touch pen equipped with a vibration motor. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Exemplary embodiments of the present invention will now be described with reference to the drawings.

[0011] In the drawings, the direction in which the central axis J of the vibration motor 10 extends is referred to as the "vertical direction", with the upper side indicated as X1 and the lower side indicated as X2. Note that the above-mentioned vertical direction does not limit the mounting direction of the vibration motor 10 when the vibration motor 10 is mounted on a device.

[0012] In addition, the radial direction relative to the central axis J will be simply referred to as the "radial direction," the direction approaching the central axis J will be referred to as the radially inward direction, and the direction moving away from the central axis J will be referred to as the radially outward direction.

[0013] <1. Overall configuration of vibration motor> Fig. 1 is a perspective view of a vibration motor 10 according to an exemplary embodiment of the present invention. Fig. 2 is a vertical cross-sectional perspective view of the vibration motor 10 shown in Fig. 1. Fig. 3 is a vertical cross-sectional view of the vibration motor 10 shown in Fig. 1.

[0014] The vibration motor 10 has a stationary part 1 and a movable part 2. In this embodiment, the vibration motor 10 further has an elastic member 3 and a substrate 4. The movable part 2 extends along a central axis J. The movable part 2 is capable of vibrating along the central axis J relative to the stationary part 1. The central axis J extends in the vertical direction.

[0015] <2.Stationary part> The stationary part 1 has a bearing part 12 and a coil 13. In this embodiment, the stationary part 1 further has a housing 11 and a top surface part .

[0016] The housing 11 is a cylindrical member extending in the vertical direction. The housing 11 is not limited to a cylindrical shape, and may be, for example, a rectangular tube shape. In other words, the housing 11 may be any shape as long as it is a tube extending in the vertical direction. The housing 11 is made of a magnetic material. The magnetic material is, for example, stainless steel.

[0017] The bearing portion 12 is a cylindrical sleeve bearing extending along the central axis J. The bearing portion 12 is made of, for example, a resin having a low coefficient of friction and low wear. The resin is, for example, POM (polyacetal).

[0018] The bearing portion 12 has a cylindrical hollow portion 12A extending in the vertical direction. The bearing portion 12 has a first region 121, a second region 122, and a third region 123. The second region 122 is disposed below the first region 121. That is, the bearing portion 12 has the second region 122 disposed below the first region 121. The third region 123 is disposed above the first region 121. The inner diameters of the first region 121, the second region 122, and the third region 123 are approximately the same. This forms a hollow portion 12A with a substantially constant diameter in the vertical direction.

[0019] The first region 121, the second region 122, and the third region 123 are integrally formed. The first region 121 is cylindrical and extends in the up-down direction. A conductor wire is wound around the radial outer periphery of the first region 121 to form the coil 13. The coil 13 is formed by winding the conductor wire around the central axis J. The radial inner surface of the coil 13 contacts the radial outer surface of the first region 121. That is, the bearing 12 has the first region 121, and the first region 121 has an inner-coil region 121A arranged radially inward of the coil 13.

[0020] The radially outer end position of the first region 121 coincides with the radially inner end position of the coil 13. This allows the coil 13 to be wound around the first region 121 after the bearing portion 12 is formed during the manufacture of the vibration motor 10, thereby improving the mass productivity of the vibration motor 10.

[0021] The second region 122 has a cylindrical base 122A extending in the up-down direction, and a third protrusion 122B protruding radially outward from the lower end of the base 122. That is, the second region 122 has the third protrusion 122B protruding radially outward. The third protrusion 122B is annular. When manufacturing the vibration motor 10, the bearing 12 is inserted into the housing 11 from below. Upon insertion, the upper surface of the third protrusion 122B comes into contact with the lower surface of the housing 11 in the up-down direction. This allows the bearing 12 to be positioned in the up-down direction with respect to the housing 11.

[0022] With the bearing portion 12 accommodated in the housing 11, the housing 11 is disposed radially outward from the radially outer end of the coil 13. In other words, the stationary portion 1 has a cylindrical housing 11 that is disposed radially outward from the radially outer end of the coil 13 and extends in the vertical direction.

[0023] The radially outer surface of base portion 122A is disposed radially outward from the radially outer surface of coil 13. That is, the radially outer surface of second region 122 is disposed radially outward from the radially outer surface of first region 121. The upper surface of second region 122 is disposed opposite the lower end of coil 13 in the up-down direction. This makes it possible to prevent coil 13 from moving downward below the upper surface of second region 122.

[0024] The third region 123 has a cylindrical shape extending in the up-down direction. A radially outer end of the third region 123 is disposed radially outward from a radially inner end of the coil 13. A lower surface of the third region 123 is disposed facing an upper end of the coil 13 in the up-down direction. The third region 123 is a flange portion. This makes it possible to prevent the coil 13 from moving upward beyond the lower surface of the third region 123.

[0025] <3. Moving parts> The movable portion 2 has a core portion 21 and a holding portion 22 .

[0026] The core portion 21 is a cylindrical member extending along the axial direction. In this embodiment, the core portion 21 has, for example, two magnets arranged vertically and a magnetic body sandwiched between the magnets. In this case, for example, the lower side of the upper magnet is the N pole and the upper side is the S pole. The upper side of the lower magnet is the N pole and the lower side is the S pole. That is, the N poles face each other vertically with the magnetic body sandwiched between them. By forming the housing 11 from a magnetic body, it is possible to suppress leakage of the magnetic field generated by the magnets and the coil 13 to the outside of the vibration motor 10 and increase the magnetic force. Note that the magnetic poles of the magnets may be opposite to those described above in the vertical direction.

[0027] The retaining portion 22 retains the upper end portion 21T of the core portion 21. The retaining portion 22 has a columnar recess 221 that is recessed upward into a cylindrical shape. The upper end portion 21T is disposed within the columnar recess 221. The upper end portion 21T is fixed to the columnar recess 221 by, for example, adhesion. That is, the retaining portion 22 is fixed to the core portion 21.

[0028] The holder 22 functions as a weight and is made of, for example, a metal. One example of the metal is a tungsten alloy.

[0029] The holding portion 22 has an annular recess 222 that is recessed downward from the upper surface in an annular shape. The vibration motor 10 has an elastic member 3. A lower end portion of the elastic member 3 is fixed to the annular recess 222. The elastic member 3 is fixed to the annular recess 222 by, for example, welding or bonding. That is, the elastic member 3 is disposed above the holding portion 22. A lower end portion of the elastic member 3 is fixed to the holding portion 22.

[0030] The stationary part 1 has a top surface part 14. The top surface part 14 is a substantially disk-shaped cover member centered on a central axis J. The top surface part 14 has an annular recess 141 that is recessed in an annular shape upward from the lower surface. The upper end part of the elastic member 3 is fixed to the annular recess 141. The elastic member 3 is fixed to the annular recess 141 by, for example, welding or bonding. That is, the upper end part of the elastic member 3 is connected to the top surface part 14.

[0031] The top surface portion 14 has a top surface flange portion 142 that protrudes in the radial direction. When manufacturing the vibration motor 10, the top surface portion 14 is inserted into the housing 11 from above. At this time, the lower surface of the top surface flange portion 142 comes into contact with the upper surface of the housing 11 in the up-down direction. This makes it possible to determine the up-down position of the top surface portion 14 relative to the housing 11, and also to improve the strength of the vibration motor 10.

[0032] With this configuration, the movable part 2 is supported by the top surface part 14 via the elastic member 3. When the elastic member 3 is in its natural length, as shown in FIG. 3, a part of the lower side of the core part 21 is accommodated in the hollow part 12A of the bearing part 12. As a result, the core part 2 is supported by the bearing part 12 so as to be vibrated along the central axis J. That is, the bearing part 12 supports the movable part 2 so as to be vibrated along the central axis J. That is, the bearing part 12 extends along the central axis J and supports the movable part 2 so as to be vibrated along the central axis J. In addition, the lower side of the movable part 2 is supported by the bearing part 12, but the lower side of the movable part 2 is not supported in the axial direction. As a result, it is possible to suppress the restoring force of the movable part in the vertical direction from becoming unnecessarily large, compared to a case in which the movable part is supported by an elastic member or the like from both the upper and lower directions. Therefore, it is possible to increase the vibration of the movable part in the vertical direction. In addition, since there is no need to arrange an elastic member below the movable part 2, the configuration of the vibration motor 10 is simplified and mass productivity is improved.

[0033] When a current is applied to the coil 13, a magnetic field is generated from the coil 13. The generated magnetic field interacts with the magnetic field from the core portion 21, causing the movable portion 2 to vibrate in the vertical direction.

[0034] Since the first region 121 has the inner-coil region 121A, the movable part 2 and the coil 13 can be separated by the inner-coil region 121A. This makes it possible to reduce the radial thickness of the inner-coil region 121A, and thus makes it possible to reduce the size of the vibration motor 10 in the radial direction.

[0035] Moreover, the second region 122 is disposed below the lower end of the coil 13. Therefore, by providing the second region 122 in the bearing part 12 in addition to the first region 121, the vertical length of the inner surface of the bearing part 12 that faces the movable part 2 in the radial direction is increased, and the inclination of the movable part 2 during vibration can be suppressed. This stabilizes the vibration of the vibration motor 10.

[0036] 3, a part of the movable part 2 is disposed radially inward of each of the radial inner side surface of the first region 121 and the radial inner side surface of the second region 122. More specifically, when the elastic member 3 is in a natural length state, a part of the movable part 2 is disposed radially inward of each of the radial inner side surface of the first region 121 and the radial inner side surface of the second region 122. This increases the vertical length of the movable part 2 radially facing the inner side surface of the bearing part 12, and can suppress the inclination of the movable part 2 during vibration. Therefore, vibration can be stabilized. Note that when the elastic member 3 is in a natural length state, a part of the movable part 2 does not have to be positioned radially inward of the second region 122.

[0037] Moreover, the bearing 12 has a third region 123 disposed above the first region 121. This increases the vertical length of the inner surface of the bearing 12 that faces the movable part 2 in the radial direction, thereby further suppressing tilt of the movable part 2 during vibration. Note that the radial outer end of the third region 123 may be disposed radially inward of the radial inner end of the coil 13.

[0038] Further, the lower surface 22A of the holding part 22 is disposed directly opposite to the upper surface 123A of the third region 123 in the vertical direction. That is, the movable part 2 has a surface 22A disposed directly opposite to the upper surface 123A of the third region 123 in the vertical direction. This allows the surface 22A of the movable part 2 to come into contact with the upper surface 123A of the third region 123, and the downward movement of the movable part 2 can be restricted. In particular, since the inner diameter of the second region 122 is constant in the vertical direction, the downward movement of the movable part 2 is restricted as described above, and therefore, the movable part 2 can be prevented from slipping out below the second region 122. Furthermore, as will be described later, when the substrate 4 is disposed below the second region 122, the vertical gap between the movable part 2 and the substrate 4 can be appropriately maintained.

[0039] 3, the holding part 22 has a protruding part 223 that protrudes upward. The protruding part 223, i.e., the upper surface 223A of the holding part 22, is disposed directly opposite the lower surface 14A of the top surface 14 in the up-down direction. This allows the upper surface 223A of the holding part 22 to come into contact with the lower surface 14A of the top surface 14, thereby restricting the upward movement of the movable part 2.

[0040] <4. Electrical connection between the board and the coil> Fig. 4 is a perspective view showing a configuration relating to an electrical connection between the substrate 4 and the coil 13. As shown in Fig. 4, a recess 12B extending in the up-down direction and recessed radially inward is formed on the radially outer surface of the second region 122. At least a portion of the lead wire 131 drawn out from the coil 13 is accommodated in the recess 12B. Note that the entire lead wire 131 may be accommodated in the recess 12B. In other words, it is sufficient that at least a portion of the lead wire 131 is accommodated in the recess 12B.

[0041] This eliminates the need to route the lead wire 131 radially outward from the bearing portion 12. Therefore, compared to the case where the lead wire 131 is routed radially outward from the bearing portion 12, it is possible to suppress interference of the lead wire 131 with other parts or other members in the vibration motor 10, and it is possible to reduce the size of the vibration motor 10 in the radial direction. Also, the manufacturing efficiency of the vibration motor 10 is improved.

[0042] 4, the substrate 4 is disposed below the second area portion 122 and extends in the radial direction. The substrate 4 may be a flexible printed circuit board or a rigid printed circuit board.

[0043] The bearing portion 12 has a first protrusion 12C protruding downward from the lower surface of the second region portion 122. The lower end of the lead wire 131 drawn downward is wound around the first protrusion 12C. In other words, the lead wire 131 is tied up around the first protrusion 12C.

[0044] The substrate 4 has a first electrode portion 41 and a second electrode portion 42. The first electrode portion 41 and the second electrode portion 42 are electrically connected by a wiring pattern (not shown in FIG. 4) inside the substrate 4. When manufacturing the vibration motor 10, the substrate 4 is attached to the second region portion 122, and the first electrode portion 41 and the lead wire 131 tied to the first protrusion 12C are electrically connected by soldering or the like. This work may be automatic or manual. Therefore, the vibration motor 10 can be manufactured with better workability than when the lead wire is directly connected to the substrate. In addition, the mechanism for tying the lead wire 131 to the first protrusion 12C improves the reliability of the electrical connection between the lead wire and the substrate 4 even when the outer diameter of the lead wire is small. Therefore, whether the outer diameter of the lead wire is small or large, the reliability of the electrical connection between the lead wire and the substrate is improved, so that the outer diameter of the lead wire can be adjusted according to the application of the vibration motor, and the electrical resistance and output characteristics of the coil 13 can be easily adjusted.

[0045] In this manner, the lower end of lead wire 131 drawn downward from coil 13 is electrically connected to substrate 4. This makes it possible to easily route lead wire 131 for electrically connecting coil 13 and substrate 4.

[0046] Furthermore, the substrate 4 has a plurality of notches 4A recessed from the radial outer edge of the substrate 4 in a direction approaching the central axis J. The bearing portion 12 has a plurality of second protrusions 12D protruding downward from the lower surface of the second region portion 122. The plurality of second protrusions 12D are housed in the plurality of notches 4A. This allows the substrate 4 to be positioned.

[0047] <5. First modified example of bearing portion> 5 is a diagram showing a partial configuration of the bearing portion 12 according to a modified example. In the modified example shown in FIG. 5, the entire coil 13 is disposed inside the first region 121 and is integrally formed with the first region 121. The inner-coil region 121A is a part of the first region 121. Note that a part of the coil 13 may be disposed inside the first region 121. That is, it is only necessary that at least a part of the coil 13 is disposed inside the first region 121 and is integrally formed with the first region 121. This allows the coil 13 to be firmly fixed to the bearing portion 12.

[0048] 5, the lead wire 131 drawn out from the coil 13 is disposed inside the second region 122 and is formed integrally with the second region 122. This allows the lead wire 131 to be firmly fixed to the bearing portion 12.

[0049] The configuration shown in FIG. 5 can be formed by insert molding.

[0050] <6. Second modified example of bearing portion> Fig. 6 is a perspective view showing a lower end portion 12BT of a bearing portion 12 according to another modified example. Fig. 6 is a view showing a state in which the substrate 4 has been removed. The lower end portion 12BT of the bearing portion 12 corresponds to the lower end portion of the second region portion 122.

[0051] As shown in FIG. 6, the lower end 12BT is formed with a groove-shaped communication part 1221 that extends in the radial direction and is recessed upward from the lower surface of the bearing part 12. The communication part 1221 communicates the radially inner space of the lower end 12BT with the radially outer space. That is, the bearing part 12 has the communication part 1221 that communicates the radially inner space of the bearing part 12 with the radially outer space. As a result, when the movable part 2 vibrates up and down, the gas inside the bearing part 12 is discharged to the outside of the bearing part 12 through the communication part 1221, so that it is possible to suppress a decrease in the amplitude of vibration due to compression of the gas inside the bearing part 12. In addition, in a configuration in which the substrate 4 is disposed below the bearing part 12 as in this embodiment, a configuration in which the communication part 1221 is provided to discharge the gas inside the bearing part 12 to the outside of the bearing part 12 is particularly useful.

[0052] The communicating portion 1221 is not limited to a groove shape, and may be formed as, for example, a through hole that penetrates the bearing portion 12 in the radial direction.

[0053] <7. Equipment to be installed> FIG. 7 is a diagram showing a touch pen 50 as an example of a target device equipped with a vibration motor 10. The touch pen 50 is a device that operates a device such as a smartphone or a tablet by touching the touch panel of the device. By mounting the vibration motor 10 on the touch pen 50, the touch pen 50 can be vibrated to provide haptic feedback to the user. That is, the touch pen 50 is an example of a haptic device having the vibration motor 10. That is, the haptic device has the vibration motor 10. For example, the haptic feedback can provide the user with a sensation as if he or she were writing characters on paper or the like with the touch pen 50. By mounting the vibration motor 10 on the haptic device, the haptic device can be made smaller.

[0054] Furthermore, the vibration motor 10 can be mounted not only on a touch pen but also on various devices such as an air-operated device. For example, the vibration motor 10 can be mounted on a device such as an electronic pen, an electronic writing tool, or a mouse, and the device can be made into an electronic device capable of inputting stereoscopic images or virtual reality images.

[0055] <8.Other> The embodiment of the present invention has been described above. Note that the scope of the present invention is not limited to the above embodiment. The present invention can be implemented by adding various modifications to the above embodiment without departing from the spirit of the invention. [Industrial Applicability]

[0056] The present invention can be used, for example, in vibration motors mounted on various devices such as touch pens. [Explanation of symbols]

[0057] 1 Stationary part 2 Moving parts 3 Elastic member 4. Board 4A Notch 10 Vibration motor 11. Housing 12 Bearing section 12A Hollow part 12B Recess 12C First protrusion 12D Second convex part 12BT lower end 1221 Communication part 13 Coil 14 Top section 21 Core 22 Holding part 41 1st electrode part 42 Second electrode part 50 Touch Pen 121 1st area part 121A Coil inner area 122 2nd area part 122A base 122B 3rd protrusion 123 Third area 131 Leader 141 Circular recess 142 Top flange 221 Columnar recess 222 Circular recess 223 Protrusion J center axis

Claims

1. A stationary portion; A movable part that can vibrate along a central axis extending in a vertical direction relative to the stationary part; having The stationary portion is a bearing portion that extends along the central axis, accommodates the movable portion radially inward, and supports the movable portion so that the movable portion is vibratory along the central axis; A coil formed by winding a conductive wire around the central axis; having The bearing portion has a first region having an inner-coil region disposed radially inward of the coil, the movable portion includes a core portion supported by the bearing portion so as to be vibrated along the central axis, and a holding portion fixed to the core portion, The holding portion holds an upper end portion of the core portion, The holding portion has a columnar recess that is recessed upward in a columnar shape, and the upper end portion is located within the columnar recess, The bearing portion has a third region disposed above the first region, The movable portion has a surface that is disposed directly opposite an upper surface of the third region in the up-down direction.

2. The vibration motor according to claim 1 , wherein a radially outer end position of the first region coincides with a radially inner end position of the coil.

3. The vibration motor according to claim 1 , wherein at least a portion of the coil is disposed inside the first region and is sealed with a resin of the first region.

4. The vibration motor according to claim 1 , wherein the bearing portion has a communication portion that communicates a radially inner space of the bearing portion with a radially outer space of the bearing portion.

5. A radially outer end of the third region is disposed radially outward from a radially inner end of the coil, The vibration motor according to claim 1 , wherein a lower surface of the third region is disposed so as to face an upper end of the coil in the up-down direction.

6. An elastic member is provided. The elastic member is disposed above the holding portion, A lower end of the elastic member is fixed to the holding portion, the stationary portion has a top surface portion to which an upper end portion of the elastic member is connected, The vibration motor according to claim 1 , wherein an upper surface of the holding portion is disposed directly opposite a lower surface of the top surface portion in the up-down direction.

7. The stationary portion is disposed radially outward from a radially outer end of the coil and has a cylindrical housing extending in a vertical direction, The top surface portion has a top surface flange portion protruding in a radial direction, The vibration motor according to claim 6 , wherein a lower surface of the top flange portion is in vertical contact with an upper surface of the housing.

8. The bearing portion has a second region portion disposed below the first region portion, The second region has a third protrusion protruding radially outward, The vibration motor according to claim 7 , wherein an upper surface of the third protrusion is in vertical contact with a lower surface of the housing.

9. A stationary portion; A movable part that can vibrate along a central axis extending in a vertical direction relative to the stationary part; having The stationary portion is a bearing portion extending along the central axis and supporting the movable portion so that the movable portion is vibrating along the central axis; A coil formed by winding a conductive wire around the central axis; having The bearing portion has a first region having an inner-coil region disposed radially inward of the coil, The bearing portion has a second region disposed below the first region, The second region is disposed below a lower end of the coil, A vibration motor, wherein a portion of the movable portion is disposed radially inward of a radially inner surface of the first region and a radially inner surface of the second region.

10. A stationary portion; A movable part that can vibrate along a central axis extending in a vertical direction relative to the stationary part; having The stationary portion is a bearing portion extending along the central axis and supporting the movable portion so that the movable portion is vibrating along the central axis; A coil formed by winding a conductive wire around the central axis; having The bearing portion has a first region having an inner-coil region disposed radially inward of the coil, The bearing portion has a second region disposed below the first region, The second region is disposed below a lower end of the coil, A recess extending in the vertical direction and recessed inward in the radial direction is formed on a radially outer surface of the second region, At least a portion of the lead wire drawn from the coil is accommodated in the recess.

11. A stationary portion; A movable part that can vibrate along a central axis extending in a vertical direction relative to the stationary part; having The stationary portion is a bearing portion extending along the central axis and supporting the movable portion so that the movable portion is vibrating along the central axis; A coil formed by winding a conductive wire around the central axis; having The bearing portion has a first region having an inner-coil region disposed radially inward of the coil, The bearing portion has a second region disposed below the first region, The second region is disposed below a lower end of the coil, A radially outer surface of the second region is disposed radially outward from a radially outer surface of the first region, A vibration motor, wherein an upper surface of the second region is arranged to face a lower end of the coil in the vertical direction.

12. A stationary portion; A movable part that can vibrate along a central axis extending in a vertical direction relative to the stationary part; having The stationary portion is a bearing portion extending along the central axis and supporting the movable portion so that the movable portion is vibrating along the central axis; A coil formed by winding a conductive wire around the central axis; having The bearing portion has a first region having an inner-coil region disposed radially inward of the coil, The bearing portion has a second region disposed below the first region, The second region is disposed below a lower end of the coil, a substrate disposed below the second region and extending in a radial direction; A vibration motor, wherein a lower end of a lead wire drawn downward from the coil is electrically connected to the substrate.

13. the bearing portion has a first protrusion protruding downward from a lower surface of the second region, The vibration motor according to claim 12 , wherein the lead wire is tied to the first protrusion.

14. the substrate has a plurality of notches recessed from a radial outer edge of the substrate toward the central axis, the bearing portion has a plurality of second protrusions protruding downward from a lower surface of the second region portion, The vibration motor according to claim 12 or 13, wherein the second protrusions are housed in the notches.

15. A haptic device comprising a vibration motor according to any one of claims 1 to 14.

Images