JP2018043227A - Vibration motor - Google Patents

Abstract

SOLUTION: A damper member 12 comprises: a first longitudinal part 12A extending longitudinally in an overlapping manner, from one side of a longitudinal direction of a first fixed part 11B3 in a second extension part 11B to the other side of the longitudinal direction of the first fixed part 11B3 in the first fixed part 11B3 and the second extension part 11B, in a vertical plain view, and a second longitudinal part 12B extending longitudinally, in an overlapping manner, from one side of a longitudinal direction of a second fixed part 11F3 in a fourth extension part 11F to the other side of the longitudinal direction of the second fixed part 11F3 in the second fixed part 11F3 and the fourth extension part 11F, in the vertical plain view. An inner part 111 composed of a first extension part 11A; a third extension part 11E; and a fifth connection part 11I directly faces an upper surface 81 of a weight 8 in the vertical plain view.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a vibration motor.

  Conventionally, various devices such as a smartphone are provided with a vibration motor. There are types of vibration motors that perform linear vibration in the horizontal direction and types that perform linear vibration in the vertical direction. Humans who are users are more likely to feel vertical vibrations than horizontal vibrations. An example of a conventional longitudinal linear vibration type vibration motor is disclosed in Patent Document 1.

  The vibration motor of Patent Literature 1 includes a fixed portion, a magnetic field portion, a substrate, a vibration portion, and an elastic member. The fixing portion includes a case whose bottom is opened and a bracket that seals the internal space of the case. The magnetic field part has a magnet fixed on the bracket and a yoke plate fixed on the magnet. The vibration unit includes a coil and a mass body. The substrate is fixed to the lower surface of the coil. The elastic member is disposed between the case and the vibration part. The coil has an inner diameter larger than the outer diameter of the opposing magnet, and a part of the magnet can be inserted into a space formed by the coil.

  When the coil is energized through the substrate, the vibration part vibrates in the vertical direction due to the interaction between the magnetic field generated in the coil and the magnetic field formed by the magnet.

JP2013-85438A (FIG. 4 etc.)

  In smartphones, wearable devices, and the like on which vibration motors are mounted, a larger battery tends to be mounted for long-time driving, and the degree of freedom of vibration motor placement location and placement volume is small. In particular, since the dead space in the device is a rectangular space such as the side of the battery, it is required to arrange a vibration motor in this space.

  In view of this, in order to arrange in the rectangular space, it is conceivable that the shape of the vibration motor is not a round shape as in Patent Document 1, but a rectangular shape. In this case, the weight included in the vibrating body also has a rectangular shape in plan view. However, in that case, when the vibrating body vibrates in the vertical direction, as schematically shown in FIG. 17, the vibrating body 200 including the weight Wt has one end and the other end in the long side direction in a side view. May move undulatingly moving in opposite directions in the vertical direction. In FIG. 17, the up and down arrows indicate the vibration direction of the vibrating body 200, and the white arrows indicate the undulating movement of the vibrating body 200.

  Here, in patent document 1, the damping increase part is provided in the whole area | region of the elastic member which supports a vibrating body, It is possible to suppress the said undulating motion using this damping increase part. However, if the damping increasing portion is provided in the entire area of the elastic member, the vibration amount of the vibrating body may be reduced. On the other hand, when the damping increasing portion is provided in a partial region of the elastic member, the stress applied to the damping increasing portion is increased, and the damping increasing portion may be sagged to reduce the damping force.

  In view of the above situation, an object of the present invention is to provide a longitudinal linear vibration type vibration motor capable of suppressing the sag of the damper member and suppressing the decrease in the vibration amount of the vibrating body.

An exemplary vibration motor of the present invention includes a stationary part having a base plate, a substrate, a coil, and a case,
A vibrating body including a magnet, a back yoke, and a weight, and supported so as to be able to vibrate in a vertical direction with respect to the stationary portion;
An elastic member;
A damper member;
With
The substrate is disposed on the base plate;
The coil is disposed on the substrate;
The magnet is disposed so as to be accommodated by vibration on the inner peripheral side of the annular coil,
The back yoke is disposed on the magnet;
The weight is disposed on the back yoke;
The case houses the coil, the magnet, the back yoke, and the weight,
The elastic member is disposed between the case and the weight;
The weight extends in a longitudinal direction perpendicular to the vertical direction in a plan view in the vertical direction,
The direction perpendicular to the vertical direction and the longitudinal direction is the short direction of the weight,
The elastic member is
A first extending portion extending in the longitudinal direction;
A second extending portion extending in the longitudinal direction;
A first connecting portion that connects one end of the first extending portion and one end of the second extending portion;
A second connecting portion connecting the other end of the first extending portion and the other end of the second extending portion;
A third extending portion extending in the longitudinal direction and facing the first extending portion in the short direction;
A fourth extending portion extending in the longitudinal direction;
A third connecting portion that connects one end of the third extending portion and one end of the fourth extending portion;
A fourth connecting portion connecting the other end of the third extending portion and the other end of the fourth extending portion;
A fifth connecting portion for connecting a longitudinally inner portion of the first extending portion and a longitudinally inner portion of the third extending portion in the short direction;
Have
The first extending portion is inclined upward as it goes from the inside in the longitudinal direction to both ends,
The second extending portion is inclined upward as it goes inward in the longitudinal direction from both ends,
The third extending portion is inclined upward as it goes from the inside in the longitudinal direction to both end portions,
The fourth extending portion is inclined upward as it goes from both ends toward the inside in the longitudinal direction,
The second extending portion has a first fixing portion at the top of the slope,
The fourth extending portion has a second fixing portion at the top of the slope,
The fifth connecting portion is fixed to an upper surface of the weight;
The first fixing part and the second fixing part are fixed to the case,
The damper member is fixed to the upper surface of the weight;
The damper member is
In plan view in the up-down direction, the first extending portion overlaps the first fixing portion in the second extending portion from the one side in the longitudinal direction to the other side in the longitudinal direction of the first fixing portion in the second extending portion. A first longitudinal portion extending in a direction;
In a plan view in the up-down direction, the longitudinal direction overlaps from one side in the longitudinal direction of the second fixing portion in the fourth extending portion to the second fixing portion and the other side in the longitudinal direction of the second fixing portion in the fourth extending portion. A second longitudinal portion extending in the direction,
An inner portion composed of the first extending portion, the third extending portion, and the fifth connecting portion is configured to directly face the upper surface of the weight in a plan view in the vertical direction.

Another exemplary vibration motor of the present invention includes a stationary portion having a base plate, a substrate, a coil, and a case,
A vibrating body including a magnet, a back yoke, and a weight, and supported so as to be able to vibrate in a vertical direction with respect to the stationary portion;
An elastic member;
A damper member;
With
The substrate is disposed on the base plate;
The coil is disposed on the substrate;
The magnet is disposed so as to be accommodated by vibration on the inner peripheral side of the annular coil,
The back yoke is disposed on the magnet;
The weight is disposed on the back yoke;
The case houses the coil, the magnet, the back yoke, and the weight,
The elastic member is disposed between the case and the weight;
The weight extends in a longitudinal direction perpendicular to the vertical direction in a plan view in the vertical direction,
The direction perpendicular to the vertical direction and the longitudinal direction is the short direction of the weight,
The elastic member is
A first extending portion extending in the longitudinal direction;
A second extending portion extending in the longitudinal direction;
A first connecting portion that connects one end of the first extending portion and one end of the second extending portion;
A second connecting portion connecting the other end of the first extending portion and the other end of the second extending portion;
A third extending portion extending in the longitudinal direction and facing the first extending portion in the short direction;
A fourth extending portion extending in the longitudinal direction;
A third connecting portion that connects one end of the third extending portion and one end of the fourth extending portion;
A fourth connecting portion connecting the other end of the third extending portion and the other end of the fourth extending portion;
A fifth connecting portion for connecting a longitudinally inner portion of the first extending portion and a longitudinally inner portion of the third extending portion in the short direction;
Have
The first extending portion is inclined downward as it goes from the inside in the longitudinal direction to both ends,
The second extending portion is inclined downward from the both ends toward the inside in the longitudinal direction,
The third extending portion is inclined downward as it goes from the inside in the longitudinal direction to both ends,
The fourth extending portion is inclined downward from both ends toward the inside in the longitudinal direction,
The second extending portion has a first fixing portion at the bottom of the slope,
The fourth extending portion has a second fixing portion at the bottom of the slope,
The fifth connecting portion is fixed to the case;
The first fixing part and the second fixing part are fixed to the upper surface of the weight,
The damper member is fixed to the case;
The damper member is
In plan view in the up-down direction, the first extending portion overlaps the first fixing portion in the second extending portion from the one side in the longitudinal direction to the other side in the longitudinal direction of the first fixing portion in the second extending portion. A first longitudinal portion extending in a direction;
In a plan view in the up-down direction, the longitudinal direction overlaps from one side in the longitudinal direction of the second fixing portion in the fourth extending portion to the second fixing portion and the other side in the longitudinal direction of the second fixing portion in the fourth extending portion. A second longitudinal portion extending in the direction,
The inner part composed of the first extending part, the third extending part, and the fifth connecting part is configured to directly face the case in plan view in the vertical direction.

  According to the vibration motor of the present invention, it is possible to provide a longitudinal linear vibration type vibration motor that can suppress the sag of the damper member and can suppress the decrease in the vibration amount of the vibrating body.

FIG. 1 is an overall perspective view of a vibration motor according to an embodiment of the present invention as viewed from above. FIG. 2 is a view in which the side surface portion on one side in the short direction of the case is omitted in FIG. 1. FIG. 3 is a side sectional view of the vibration motor according to the embodiment of the present invention. FIG. 4 is a perspective view of the vibration motor in a state where illustration of the top surface portion of the case is omitted. FIG. 5 is a plan view of the vibration motor in the state of FIG. 4 as viewed from above. FIG. 6 is a plan view illustrating a configuration example of the damper member. FIG. 7 is a plan view illustrating a configuration example of the damper member. FIG. 8A is a schematic cross-sectional view illustrating a method for fixing a damper member to a vibrating body. FIG. 8B is a cross-sectional view illustrating a component in which a damper member is fixed to a vibrating body. FIG. 9 is a perspective view showing a partial configuration of a vibration motor including an elastic member and a damper member according to a modification. FIG. 10 is an overall perspective view of the back yoke. FIG. 11 is a diagram schematically showing a processing state of a mold (metal plate) when manufacturing a back yoke of a comparative example. FIG. 12 is a diagram schematically showing a processing state of the mold when the back yoke of the present embodiment is manufactured. FIG. 13 is a perspective view showing a configuration in which a substrate and a coil are arranged with respect to a base plate. FIG. 14 is a plan view of FIG. 13 viewed from above. FIG. 15 is a perspective view showing a configuration in which the substrate is arranged with respect to the base plate. FIG. 16 is a perspective view for explaining coil fixing by a jig. FIG. 17 is a schematic diagram illustrating the undulating motion of the vibrating body.

  Hereinafter, exemplary embodiments of the present invention will be described with reference to the drawings. In the following drawings, the vibration direction of the vibrating body is represented in the Z direction, with the vertical direction being the vibration direction. In addition, a longitudinal direction that is a direction orthogonal to the vertical direction is represented by an X direction. Moreover, the short direction which is a direction orthogonal to an up-down direction and a longitudinal direction is represented by the Y direction. However, this definition of direction does not indicate the positional relationship and direction when incorporated in an actual device.

<1. Overall configuration of vibration motor>
First, a basic overall configuration of a vibration motor according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an overall perspective view of a vibration motor 15 according to an embodiment of the present invention as viewed from above. FIG. 2 is a view in which the side surface portion on one side in the short direction of the case 4 in FIG. 1 is omitted, and the internal configuration of the case 4 is visible. FIG. 3 is a side sectional view of the vibration motor 15.

  The vibration motor 15 according to this embodiment is roughly provided with a stationary part 5, a vibrating body 10, an elastic member 11, and a damper member 12.

  The stationary part 5 includes a base plate 1, a substrate 2, a coil 3, and a case 4. The base plate 1 is a metal plate-like member, for example. The base plate 1 is formed in a rectangular shape having a long side as a long side and a short side as a short side when viewed from above.

  The board | substrate 2 is arrange | positioned on the baseplate 1 and is comprised by FPC (flexible printed circuit board). In addition, the board | substrate 2 may be comprised with a rigid board | substrate. The substrate 2 includes a first substrate unit 21, a connection unit 22, and a second substrate unit 23. A first substrate portion 21, a connection portion 22, and a second substrate portion 23 are sequentially arranged in the longitudinal direction. The longitudinal width of the first substrate portion 21 is shorter than the longitudinal width of the second substrate portion 23. The width of the first substrate portion 21 and the second substrate portion 23 in the short direction is the same, and is longer than the width of the connection portion 22 in the short direction.

  The two first terminal portions 21A are formed side by side in the short direction on the first substrate portion 21, and are exposed on the upper surface side. The two second terminal portions 22A are formed side by side in the short direction in the connection portion 22, and are exposed on the upper surface side. The first terminal portion 21 </ b> A and the second terminal portion 22 </ b> A adjacent in the longitudinal direction are connected by the wiring of the substrate 2 and are conducted.

  The coil 3 is disposed on the second substrate portion 23 of the substrate 2. The coil 3 is formed in an annular shape having a long side in the longitudinal direction and a short side in the short direction as viewed from above. The lead wire 31 drawn from the coil 3 is connected to the second terminal portion 22A. Thereby, an electric current can be sent through the coil 3 by applying a voltage to the first terminal portion 21A from the outside.

  The case 4 is a cover member having an open bottom surface in a rectangular parallelepiped having a long side in the longitudinal direction and a short side in the short side direction when viewed from above. The coil 3, the vibrating body 10, the elastic member 11, and the damper member 12 are accommodated in the internal space of the case 4.

  The vibrating body 10 includes a magnet 6, a back yoke 7, a weight 8, and a pole piece 9. The magnet 6 is a rectangular parallelepiped member having a rectangular shape with the long side as the long side and the short side as the short side as viewed from above.

  The back yoke 7 is disposed on the magnet 6 and is made of a magnetic material. The back yoke 7 has a top surface portion 71 and two long side protruding portions 72. The top surface portion 71 has a rectangular shape with the long side as the long side and the short side as the short side as viewed from above. The long-side protruding portion 72 protrudes downward from each long-side portion facing the short side direction of the top surface portion 72.

  The weight 8 is disposed on the back yoke 7 and is formed of, for example, a tungsten alloy. The weight 8 is a rectangular parallelepiped member having a rectangular shape with the long side in the long side and the short side in the short side as viewed from above.

  The pole piece 9 is a plate-like member that is disposed on the lower surface of the magnet 6 and is made of a magnetic material. The pole piece 9 has a rectangular shape with the long side as the long side and the short side as the short side as viewed from above. A magnetic path is formed by the magnet 6, the back yoke 7, and the pole piece 9.

  The elastic member 11 has one end fixed to the lower surface of the top surface portion 41 of the case 4 and the other end fixed to the upper surface 81 of the weight 8. That is, the elastic member 11 is disposed between the case 4 and the weight 8. Thereby, the vibrating body 10 is supported so that it can vibrate up and down with respect to the stationary part 5.

  The magnet 6 and the pole piece 9 are accommodated in the inner circumferential space of the coil 3 depending on the position when vibrating. That is, the magnet 6 is disposed on the inner peripheral side of the annular coil 3 so as to be housed by vibration.

  By applying a voltage to the first terminal portion 21A of the substrate 2 from the outside, a current flows through the coil 3, and a magnetic field generated in the coil 3 and a magnetic field formed by the magnet 6, the back yoke 7, and the pole piece 9 Due to the interaction, the vibrating body 10 vibrates in the vertical direction. Therefore, the vibration motor 15 is a longitudinal linear vibration type.

  As described above, the base plate 1, the case 4, the magnet 6, the back yoke 7, and the weight 8 each have a rectangular shape including a long side in the longitudinal direction and a short side in the short side direction when viewed from above. Therefore, the longitudinal linear vibration type vibration motor 15 can be disposed in a rectangular dead space such as a side of a battery in a device such as a smartphone or a wearable device.

  The stationary part 5 further includes lower damper members D1 and D2, and the configuration thereof will be described later.

<2. Configuration of elastic member and damper member>
Next, a more specific configuration of the elastic member 11 will be described with reference to FIGS. 4 and 5 in particular. FIG. 4 is a perspective view of the vibration motor 15 in a state in which the illustration of the top surface portion 41 of the case 4 is omitted, and the internal configuration of the case 4 is visible. FIG. 5 is a plan view of the vibration motor 15 in the state of FIG. 4 as viewed from above.

  As shown in FIGS. 4 and 5, the elastic member 11 includes a first extending portion 11A, a second extending portion 11B, a first connecting portion 11C, a second connecting portion 11D, and a third extending portion 11E. It has the 4th extending part 11F, the 3rd connecting part 11G, the 4th connecting part 11H, and the 5th connecting part 11I, and these each parts are formed as the same member.

  11 A of 1st extending parts and the 2nd extending part 11B are extended in a longitudinal direction, and are adjacent to a transversal direction by the top view. The first connecting portion 11C connects one end of the first extending portion 11A and one end of the second extending portion 11B. The second connecting portion 11D connects the other end of the first extending portion 11A and the other end of the second extending portion 11B.

  The third extending portion 11E extends in the longitudinal direction and opposes the first extending portion 11A in the short direction. The fourth extending portion 11F extends in the longitudinal direction and is adjacent to the third extending portion 11E in the lateral direction when viewed from above. The third connecting portion 11G connects one end portion of the third extending portion 11E and one end portion of the fourth extending portion 11F. The fourth connecting portion 11H connects the other end of the third extending portion 11E and the other end of the fourth extending portion 11F.

  The fifth connecting portion 11I connects the central portion of the first extending portion 11A and the central portion of the third extending portion 11E in the short direction.

  With such a configuration, only one elastic member 11 is required, and the number of parts can be reduced.

  Furthermore, if the structure of the elastic member 11 is described, 11 A of 1st extending | stretching parts will incline upward as it goes to both ends from a center part. The second extending portion 11B includes a first support portion 11B1, a second support portion 11B2, and a first fixing portion 11B3. The first support portion 11B1 is inclined upward as it goes from the first connection portion 11C side to the first fixing portion 11B3. The second support portion 11B2 is inclined upward as it goes from the second connection portion 11D side to the first fixing portion 11B3. The first fixing part 11B3 is supported by the first support part B1 and the second support part 11B2. In the above description, “inclined” includes a case where a flat state is reached in the middle, and the same applies hereinafter.

  The third extending portion 11E is inclined upward as it goes from the central portion to both end portions. The fourth extending portion 11F includes a third support portion 11F1, a fourth support portion 11F2, and a second fixing portion 11F3. The third support portion 11F1 is inclined upward as it goes from the third connection portion 11G side to the second fixing portion 11F3. The fourth support portion 11F2 is inclined upward as it goes from the fourth connection portion 11H side to the second fixing portion 11F3. The third fixing portion 11F3 is supported by the third support portion 11F1 and the fourth support portion 11F2.

  With such a configuration, the fifth connecting portion 11I is fixed to the upper surface 81 of the weight 8 by welding, and the first fixing portion 11B3 and the second fixing portion 11F3 located above the fifth connecting portion 11I are welded to the case. 4 is fixed to the lower surface of the top surface portion 41, and the vibrating body 10 can be supported so as to vibrate with respect to the case 4. Note that the fixing of the fifth connecting portion 11I, the first fixing portion 11B3, and the second fixing portion 11F3 is not limited to welding, and may be performed by bonding with an adhesive or the like.

  Further, the damper member 12 made of, for example, foamed polyurethane is fixed to the upper surface 81 of the weight 8 by bonding with an adhesive, and is disposed between the weight 8 and the elastic member 11. FIG. 6 is a plan view of the damper member 12 in a top view. As shown in FIG. 6, the damper member 12 has an annular shape in a top view having a long side in the longitudinal direction and a short side in the short direction, and is constituted by one member. The damper member 12 includes a first longitudinal portion 12A, a second longitudinal portion 12B, and an opening portion 12C that extend in the longitudinal direction.

  When viewed from above, the entire first support portion 11B1, the entire first fixing portion 11B3, and the other longitudinal direction of the first fixing portion 11B3, which are located on one side in the longitudinal direction of the first fixing portion 11B3 in the second extending portion 11B. The entire second support portion 11B2 located on the side overlaps the first longitudinal portion 12A of the damper member 12. That is, the first longitudinal portion 12A overlaps with the entire second extending portion 11B in a top view.

  In the top view, in the fourth extending portion 11F, the entire third support portion 11F1 located on one side in the longitudinal direction of the second fixing portion 11F3, the entire second fixing portion 11F3, and the other in the longitudinal direction of the second fixing portion 11F3 The entire fourth support portion 11F2 located on the side overlaps the second longitudinal portion 12B of the damper member 12. That is, the second longitudinal portion 12B overlaps with the entire fourth extending portion 11F in a top view.

  The fifth connecting portion 11 </ b> I is fixed to the upper surface 81 of the weight 8 inside the opening 12 </ b> C of the damper member 12. The inner part 111 composed of the first extending part 11A, the third extending part 11E, and the fifth connecting part 11I overlaps with the opening 12C of the damper member 12 in a top view. That is, the inner portion 111 directly faces the upper surface 81 of the weight 8 in the vertical direction without using the damper member 12. Here, the term “directly” includes the case where the fifth connecting portion 11I is fixed to the weight 8 by bonding with an adhesive or the like.

  With such a configuration, when the vibrating body 10 vibrates, the second extending portion 11B that is easier to move than the inner portion 111 comes into contact with the first longitudinal portion 12A of the damper member 12, and the fourth extending that is easier to move than the inner portion 111 is provided. Even if the portion 11F and the second longitudinal portion 12B of the damper member 12 come into contact with each other, the stress acting on the damper member 12 from the elastic member 11 is dispersed, so that the damper member 12 can be prevented from sag. Moreover, since the inner part 111 does not contact the damper member 12 during vibration of the vibrating body 10, it is possible to suppress a reduction in the amount of vibration of the vibrating body 10.

  Further, in the top view, the first longitudinal portion 12A overlaps with the entire second extending portion 11B, and the second longitudinal portion 12B overlaps with the entire fourth extending portion 11F. Can suppress the undulating movement. Note that a part of the first support part 11B1, a part of the first support part 11B3, and a part of the second support part 11B2 overlap with the first longitudinal part 12A, and a part of the third support part 11F1 and a second fixing part. You may make it the whole 11F3 and a part of 4th support part 11F2 overlap with the 2nd longitudinal part 12B.

  Further, the damper member is not limited to being configured as a single member like the damper member 12 illustrated in FIG. 6, and may be configured as a damper member 121 illustrated in FIG. 7, for example. That is, the annular damper member 121 is configured by combining the first long portion 121A, the second long portion 121B, the first short portion 121C, and the second short portion 121D, which are separate members. These separate members surround the four sides to form an opening 121E. However, the damper member 12 shown in FIG. 6 does not need to be assembled and has the effect of reducing the number of steps.

  Here, the process of fixing the damper member 12 to the vibrating body 10 in the manufacturing process of the vibration motor 15 will be described. FIG. 8A is a schematic cross-sectional view showing a method for fixing the damper member 12 to the vibrating body 10 using the first jig B and the second jig C. FIG.

  The 2nd jig | tool C is comprised from the base part C1, the pin C2, and the spring C3. The pin C2 is supported by a spring C3 so as to be movable in the vertical direction within the hole H of the base C1. The upper part of the pin C2 protrudes upward from the hole H when the spring C3 is in a natural state.

  As shown in FIG. 8A, the vibrating body 10 assembled from the weight 8, the back yoke 7, the magnet 6 and the pole piece 9 is held by the first jig B. On the other hand, the opening 12C of the damper member 12 is passed through the protruding portion of the pin C2, and the damper member 12 is placed on the base C1. Note that an adhesive portion A is formed on the surface of the damper member 12 opposite to the base portion C1.

  Then, as shown by the arrow in FIG. 8A, the weight 8 is moved closer to the pin C2 side by moving the first jig B downward. And even if the weight 8 contacts the upper surface of the pin C2, the first jig B is still moved downward, and the pin C2 is pushed downward by the weight 8. The damper member 12 is positioned by the pin C2 while the pin C2 is pushed downward against the elastic force of the spring C3. The weight 8 is fixed to the damper member 12 by the adhesive portion A when the lower surface of the weight 8 contacts the adhesive portion A and pushes the adhesive portion A. Thereby, a component in which the damper member 12 is fixed to the vibrating body 10 as shown in FIG. 8B is completed.

  Thus, the damper member 12 is annular, and it becomes easy to position the damper member 12 by passing the opening 12C through the pin C2, and the vibrating body 10 is attached to the damper member 12 with the damper member 12 positioned. Can be fixed. Since the above-described damper member 121 (FIG. 7) is also annular, a fixing method similar to the above can be applied.

As described above, the vibration motor 15 of the present embodiment includes the base plate 1, the substrate 2, the coil 3, and the case 4, and the stationary portion 5 that includes:
A vibrating body 10 that includes a magnet 6, a back yoke 7, and a weight 8, and is supported so as to vibrate in the vertical direction with respect to the stationary portion 5;
The elastic member 11 and the damper member 12 are provided.

  The substrate 2 is disposed on the base plate 1, the coil 3 is disposed on the substrate 2, the magnet 6 is disposed on the inner peripheral side of the annular coil 3 so as to be accommodated by vibration, and the back The yoke 7 is disposed on the magnet 6, and the weight 8 is disposed on the back yoke 7. The case 4 houses the coil 3, the magnet 6, the back yoke 7, and the weight 8. The elastic member 11 is disposed between the case 4 and the weight 8, and the weight 8 extends in a longitudinal direction perpendicular to the vertical direction in a plan view in the vertical direction, and is perpendicular to the vertical direction and the longitudinal direction. The direction is the short direction of the weight 8.

  The elastic member 11 connects a first extending portion 11A extending in the longitudinal direction, a second extending portion 11B extending in the longitudinal direction, one end of the first extending portion 11A, and one end of the second extending portion 11B. The first connecting portion 11C, the second connecting portion 11D connecting the other end of the first extending portion 11A and the other end of the second extending portion 11B, and the first extending portion extending in the longitudinal direction. 11A, the third extending portion 11E facing in the short direction, the fourth extending portion 11F extending in the longitudinal direction, the one end portion of the third extending portion 11E and the one end portion of the fourth extending portion 11F are connected to each other. 3 connection part 11G, 4th connection part 11H which connects the other end part of said 3rd extending | stretching part 11E, and the other end part of said 4th extending | stretching part 11F, The longitudinal direction inner side part of said 1st extending | stretching part 11A, , A fifth connecting the longitudinally inner portion of the third extending portion 11E in the short direction Has a connection portion 11I, the.

  11 A of said 1st extending | stretching parts incline upwards as it goes to both ends from a longitudinal direction inner side, and the said 2nd extending | stretching part 11B inclines upwards as it goes to a longitudinal direction inner side from both ends, and said 3rd extending | stretching The portion 11E is inclined upward as it goes from the inner side in the longitudinal direction to both ends, and the fourth extending portion 11F is inclined upward as it goes from the both ends to the inner side in the longitudinal direction.

  The second extending part 11B has a first fixing part 11B3 at the uppermost part of the inclination, and the fourth extending part 11F has a second fixing part 11F3 at the uppermost part of the inclination, and the fifth connecting part 11I. Is fixed to the upper surface 81 of the weight 8, and the first fixing portion 11B3 and the second fixing portion 11F3 are fixed to the case 4.

  The damper member 12 is fixed to the upper surface 81 of the weight 8. The damper member 12 has a first fixed portion 11B3 and a first fixed portion in the second extending portion 11B from one longitudinal side of the first fixed portion 11B3 in the second extending portion 11B in a plan view in the vertical direction. A first longitudinal portion 12A extending in the longitudinal direction overlapping the other longitudinal side of the portion 11B3, and a second fixed from the longitudinal direction one side of the second fixing portion 11F3 in the fourth extending portion 11F in a plan view in the vertical direction Part 11F3, and second longitudinal part 12B extending in the longitudinal direction overlapping with the longitudinal direction other side of the second fixing part 11F3 in the fourth extending part 11F. The inner portion 111 composed of the first extending portion 11A, the third extending portion 11E, and the fifth connecting portion 11I directly faces the upper surface 81 of the weight 8 in plan view in the vertical direction.

  According to such a configuration, even when the second extending portion and the fourth extending portion, which are more movable than the inner portion, and the damper member are in contact with each other during vibration of the vibrating body, the stress acting on the damper member is dispersed from the elastic member. The dampening of the damper member can be suppressed. Moreover, since an inner part does not contact a damper member at the time of a vibration, it can suppress that the vibration amount of a vibrating body falls.

  In the above configuration, the first longitudinal portion 12A overlaps the entire second extending portion 11B in the plan view in the vertical direction, and the second longitudinal portion 12B has the fourth length in the plan view in the vertical direction. It overlaps with the whole extending part 11F. Thereby, the undulating movement of the weight can be suppressed.

  Moreover, the said structure WHEREIN: The said damper member 12 is cyclic | annular. Thereby, positioning of the damper member by the jig is facilitated, and the damper member is easily assembled.

  Moreover, the said structure WHEREIN: The said damper member 12 is comprised by one member. This eliminates the need to assemble the damper member itself.

  In addition, the widths of the first connection part 11C, the second connection part 11D, the third connection part 11G, and the fourth connection part 11H are the same as the first extension part 11A, the second extension part 11B, and the second extension part 11H. It is wider than the width of the third extending portion 11E and the fourth extending portion 11F. Thereby, the stress applied to the elastic member when the vibrating body vibrates can be dispersed.

<3. Modified example of elastic member and damper member>
In the present embodiment, the elastic member and the damper member may be configured as follows. FIG. 9 is a perspective view showing a partial configuration of the vibration motor including the elastic member 110 and the damper member 12 according to the modification.

  In the configuration according to the modified example shown in FIG. 9, the elastic member 110 is disposed between the weight 8 and the case 4 (not shown), and the damper member 12 is disposed between the case 4 and the elastic member 110.

  The elastic member 110 includes a first extending portion 110A, a second extending portion 110B, a first connecting portion 110C, a second connecting portion 110D, a third extending portion 110E, a fourth extending portion 110F, and a third connection. The portion 110G, the fourth connection portion 110H, and the fifth connection portion 110I are included, and these portions are formed as the same member.

  110 A of 1st extending parts and the 2nd extending part 110B are extended in a longitudinal direction, and are adjacent to a transversal direction by the top view. 110C of 1st connection parts connect the one end part of 110 A of 1st extending | stretching parts, and the one end part of the 2nd extending | stretching part 110B. The second connecting portion 110D connects the other end of the first extending portion 110A and the other end of the second extending portion 110B.

  The third extending portion 110E extends in the longitudinal direction and opposes the first extending portion 110A in the short direction. The fourth extending portion 110F extends in the longitudinal direction and is adjacent to the third extending portion 110E in the lateral direction when viewed from above. The third connecting portion 110G connects one end portion of the third extending portion 110E and one end portion of the fourth extending portion 110F. The fourth connecting portion 110H connects the other end of the third extending portion 110E and the other end of the fourth extending portion 110F.

  The fifth connecting portion 110I connects the central portion of the first extending portion 110A and the central portion of the third extending portion 110E in the short direction.

  110 A of 1st extending parts incline below as it goes to both ends from a center part. The second extending portion 110B includes a first support portion 110B1, a second support portion 110B2, and a first fixing portion 110B3. The first support part 110B1 is inclined downward as it goes from the first connection part 110C side to the first fixing part 110B3. The second support part 110B2 is inclined downward as it goes from the second connection part 110D side to the first fixing part 110B3. The first fixing part 110B3 is supported by the first support part 110B1 and the second support part 110B2.

  The third extending portion 110E is inclined downward as it goes from the central portion to both end portions. The fourth extending portion 110F includes a third support portion 110F1, a fourth support portion 110F2, and a second fixing portion 110F3. The third support part 110F1 is inclined downward as it goes from the third connection part 110G side to the second fixing part 110F3. The fourth support part 110F2 is inclined downward as it goes from the fourth connection part 110H side to the second fixing part 110F3. The third fixing part 110F3 is supported by the third support part 110F1 and the fourth support part 110F2.

  With such a configuration, the fifth connecting portion 110I is fixed to the lower surface of the top surface portion 41 of the case 4 by welding or the like, and the first fixing portion 110B3 and the second fixing portion 110F3 positioned below the fifth connecting portion 110I are respectively provided. It can be fixed to the upper surface 81 of the weight 8 by welding or the like, and the vibrating body can be supported so as to vibrate with respect to the case 4.

  The damper member 12 is fixed to the lower surface of the top surface portion 41 of the case 4 by bonding with an adhesive, and is disposed between the case 4 and the elastic member 110.

  When viewed from above, the entire first support portion 110B1, the entire first fixing portion 110B3, and the other longitudinal direction of the first fixing portion 110B3, which are located on one side in the longitudinal direction of the first fixing portion 110B3 in the second extending portion 110B. The entire second support portion 110 </ b> B <b> 2 located on the side overlaps the first longitudinal portion 12 </ b> A of the damper member 12. That is, the first longitudinal portion 12A overlaps with the entire second extending portion 110B in a top view.

  In the top view, in the fourth extending portion 110F, the entire third support portion 110F1, the entire second fixing portion 110F3, and the other in the longitudinal direction of the second fixing portion 110F3, which are located on one side in the longitudinal direction of the second fixing portion 110F3. The entire fourth support portion 110F2 located on the side overlaps the second longitudinal portion 12B of the damper member 12. That is, the second longitudinal portion 12B overlaps with the entire fourth extending portion 110F in a top view.

  The fifth connection portion 110 </ b> I is fixed to the lower surface of the top surface portion 41 of the case 4 inside the opening 12 </ b> C of the damper member 12. The inner portion 1101 configured by the first extending portion 110A, the third extending portion 110E, and the fifth connecting portion 110I overlaps the opening 12C of the damper member 12 when viewed from above. That is, the inner portion 1101 directly faces the lower surface of the top surface portion 41 of the case 4 in the vertical direction without using the damper member 12.

  With such a configuration, when the vibrating body vibrates, the second extending portion 110B that is more movable than the inner portion 1101 and the first longitudinal portion 12A of the damper member 12 are in contact with each other, and the fourth extending portion that is easier to move than the inner portion 1101. Even if 110F and the second longitudinal portion 12B of the damper member 12 come into contact with each other, the stress acting on the damper member 12 from the elastic member 110 is dispersed and the sag of the damper member 12 can be suppressed. Moreover, since the inner part 1101 does not contact the damper member 12 when the vibrating body vibrates, it is possible to suppress a reduction in the vibration amount of the vibrating body.

  As described above, the vibration motor according to another aspect of the present embodiment has the following configuration as a difference from the above-described embodiment. 110 A of said 1st extending | stretching parts incline below as it goes to both ends from a longitudinal direction inner side, and the said 2nd extending | stretching part 110B inclines downward as it goes to a longitudinal direction inner side from both ends, and said 3rd extending | stretching The portion 110E is inclined downward as it goes from the inner side in the longitudinal direction to both ends, and the fourth extending portion 110F is inclined downward as it goes from the both ends to the inner side in the longitudinal direction. The second extending part 110B has a first fixing part 110B3 at the lowermost part of the inclination, and the fourth extending part 110F has a second fixing part 110F3 at the lowermost part of the inclination.

  The fifth connecting portion 110I is fixed to the case 4, the first fixing portion 110B3 and the second fixing portion 110F3 are fixed to the upper surface 81 of the weight 8, and the damper member 12 is fixed to the case 4. Fixed.

  The damper member 12 has the first fixing portion 110B3 and the first fixing portion 110B in the second extending portion 110B from one longitudinal direction side of the first fixing portion 110B3 in the second extending portion 110B in a plan view in the vertical direction. A first longitudinal portion 12A extending in the longitudinal direction overlapping with the longitudinal direction other side of the portion 110B3 and a second fixing from the longitudinal direction one side of the second fixing portion 110F3 in the fourth extending portion 110F in a plan view in the vertical direction. 110F3, and a second longitudinal portion 12B extending in the longitudinal direction overlapping the other longitudinal side of the second fixing portion 110F3 in the fourth extending portion 110F. An inner portion 1101 configured of the first extending portion 110A, the third extending portion 110E, and the fifth connecting portion 110I directly faces the case 4 in a plan view in the vertical direction.

  According to such a configuration, even when the second extending portion and the fourth extending portion, which are more movable than the inner portion, and the damper member are in contact with each other during vibration of the vibrating body, the stress acting on the damper member is dispersed from the elastic member. The dampening of the damper member can be suppressed. Moreover, since an inner part does not contact a damper member at the time of a vibration, it can suppress that the vibration amount of a vibrating body falls.

<4. About the configuration related to the back yoke>
Next, the structure regarding the back yoke 7 is demonstrated. FIG. 10 is an overall perspective view of the back yoke 7.

  As shown in FIG. 10, the back yoke 7 includes a rectangular top surface portion 71 and two long side protruding portions 72, and these portions are formed as the same member. The long side protruding portion 72 protrudes downward from each long side portion 711 of the top surface portion 71. The protruding piece does not protrude downward from each short side portion 712 of the top surface portion 71.

  That is, the back yoke 7 protrudes downward from the rectangular top surface portion 71 having the long side portion 711 in the longitudinal direction and the short side portion 712 in the short direction, and the long side portion 711 of the top surface portion 71. A long side protruding portion 72, and no short side protruding portion protruding downward from the short side portion 712 of the top surface portion 71.

  As a result, even if the vibrating body 10 vibrates when it vibrates, the back yoke 7 is not provided with the short side protruding portion, so that the back yoke 7 contacts the outer peripheral surface of each end portion in the longitudinal direction of the coil 3. This is avoided. Further, as shown in FIG. 3, the lead wire 31 of the coil 3 is positioned below one short side portion 712 of the top surface portion 71, but the short side portion 712 is not provided with a short side protruding portion, so that the back yoke It can avoid that 7 contacts the leader line 31.

  The back yoke 7 forms a magnetic path with the magnet 6. However, since the long-side protruding portion 72 contributes more to the formation of the magnetic path than the short-side protruding portion provided temporarily, the short-side protruding portion is provided. There is no problem if not.

  In addition, the configuration of the back yoke 7 can also produce the effect at the time of manufacture. FIG. 11 is a diagram schematically showing a processing state of a mold T (metal plate) in the case of manufacturing a back yoke having both a long side protruding portion and a short side protruding portion. In this case, the mold T is provided with holes H1 and H2 for forming the long side protruding portions and holes H3 and H4 for forming the short side protruding portions. And a long side protrusion part can be formed by bend | folding the long side area | region T1 enclosed by the hole H1 and the long side area | region T2 enclosed by the hole H2. Further, the short side protruding portion can be formed by bending the short side region T3 surrounded by the hole H3 and the short side region T4 surrounded by the hole H4.

  At this time, the product portion is supported by the mold T by the support portion T5 located between the hole H1 and the holes H3 and H4 and the support portion T6 located between the hole H2 and the holes H3 and H4. It becomes a state. The product back yoke can be removed from the mold T by cutting the support portions T5 and T6. However, since the regions of the support portions T5 and T6 are small, they may be cut by mistake, for example, during bending, which may lead to manufacturing trouble.

  On the other hand, FIG. 12 is a diagram schematically showing a processing state of the mold T in the case of manufacturing a back yoke that does not have a short-side protrusion as in the present embodiment. In this case, holes H1 and H2 for forming the long side protruding portions are formed in the mold T. And a long side protrusion part can be formed by bend | folding the long side area | region T1 enclosed by the hole H1 and the long side area | region T2 enclosed by the hole H2. In that state, the part to be the product is supported by the mold T by the support portion T7 located between the hole H1 and the hole H2. The back yoke, which is a product, can be removed from the mold T by cutting the support portion T7. Since the support portion T7 is less likely to be cut than the support portions T5 and T6 in the case of FIG. 11, the processing stability can be improved.

  The top surface 71 of the back yoke 7 is provided with a through hole 71A (FIG. 10) penetrating in the vertical direction. The through hole 71 </ b> A overlaps the upper surface of the magnet 6 when viewed from above. That is, the surface of the back yoke 7 to which the magnet 6 is fixed is provided with a through hole 71A penetrating in the vertical direction.

  Thereby, for example, when the magnet 6 is fixed to the top surface portion 71 by a magnetic force, the adhesive protrudes outside the magnet 6 when the adhesive is poured into the through hole 71 </ b> A and the magnet 6 is fixed to the top surface portion 71. This can be suppressed.

  Further, for example, the magnet 6 and the top surface portion 71 are brought into contact with each other with the adhesive 6 applied in advance to the peripheral region of the through hole 71 </ b> A or the surface of the magnet 6 corresponding to the peripheral region. Even in the fixing method, part of the adhesive flows into the through hole 71 </ b> A, so that the adhesive can be prevented from protruding outside the magnet 6. That is, the adhesive can escape to the through hole 71A.

  Further, for example, in the same manner as the magnet 6, the weight 8 and the top surface portion 71 are brought into contact with the surrounding area of the through-hole 71 </ b> A or in a state where an adhesive is previously applied to the surface of the weight 8 corresponding to the surrounding area, Even in the method of fixing the weight 8 to the top surface portion 71, it is possible to prevent a part of the adhesive from escaping into the through hole 71 </ b> A and the adhesive from protruding outside the weight 8.

<5. About board configuration>
Next, a more specific configuration of the substrate 2 will be described. FIG. 13 is a perspective view showing a configuration in which the substrate 2 and the coil 3 are arranged with respect to the base plate 1 in the vibration motor 15. FIG. 11 is a plan view of FIG. 10 viewed from above.

  The coil 3 has an internal space 32 on the inner peripheral side. A through region 231 penetrating in the vertical direction is formed in the second substrate portion 23 of the substrate 2. The edge part of the penetration area | region 231 contains the long side edge part 231A which opposes a transversal direction, and the short side edge part 231B which opposes a longitudinal direction. In each long side edge portion 231A, three notches C1 that are recessed on the outer peripheral side are formed. Further, at the four corners of the edge of the penetrating region 231, that is, at a location where the long edge 231 </ b> A and the short edge 231 </ b> B are close to each other, a notch C <b> 2 that is recessed toward the outer periphery is formed. The edge of the internal space 32 of the coil 3 is located above the notches C1 and C2.

  That is, the substrate 2 has a through region 231 penetrating in the vertical direction on the inner peripheral side of the coil 3, and a plurality of notches C 1 and C 2 are provided at the edge of the through region 231.

  When the coil 3 is fixed to the base plate 1, an adhesive is applied to the notches C1 and C2. Then, the coil 3 is pressed against the second substrate portion 23 from above the notches C1 and C2, thereby fixing the coil 3 to the base plate 1 while sandwiching the second substrate portion 23 between the coil 3 and the base plate 1. Can do. Therefore, it can suppress that the board | substrate 2 peels from the baseplate 1. FIG.

  FIG. 15 is a perspective view showing a configuration in which the substrate 2 is arranged with respect to the base plate 1.

  In the second substrate unit 23, a closed circuit pattern 24 is provided around the penetrating region 231. The closed circuit pattern 24 is a closed wiring pattern (for example, a copper foil pattern), and no current flows. The closed pattern 24 is formed inside the substrate 2 in FIG. 15, but may be exposed on the upper surface of the substrate 2. Further, the closed circuit pattern 24 of FIG. 15 has a shape in which both ends are not connected, but may be a ring pattern in which both ends are connected. Alternatively, the closed circuit pattern 25 may be a linear pattern divided corresponding to each side of the edge of the penetrating region 231.

  Thereby, the strength of the second substrate portion 23 whose strength is weakened by providing the through region 231 can be reinforced by the closed circuit pattern 24.

<6. About the lower damper member>
In this embodiment, as shown in FIGS. 13 and 14, lower damper members D <b> 1 and D <b> 2 are disposed in the internal space 32 of the coil 3. The lower damper members D <b> 1 and D <b> 2 are disposed at both ends in the longitudinal direction of the internal space 32. The lower damper members D1 and D2 are fixed to the upper surface of the base plate 1 exposed upward by the penetrating region 231. That is, the lower damper members D1 and D2 are arranged on the inner peripheral side of the coil 3.

  During normal vibration of the vibrating body 10, the lower surface of the vibrating body 10 does not come into contact with the lower damper members D1 and D2. When the vibration motor 15 is accidentally dropped, the vibrating body 10 moves downward and contacts the lower damper members D1 and D2. Therefore, it is avoided that the vibrating body 10 moves too much downward. Thereby, it can suppress that the elastic member 11 deform | transforms excessively. Note that the lower damper member may be disposed on the upper surface of the substrate instead of on the base plate.

<7. About the structure of the base plate>
Next, a more specific configuration of the base plate 1 will be described. As shown in FIGS. 14 and 15, two holes 1 </ b> A and 1 </ b> B penetrating in the vertical direction having different shapes are provided in a region in the through region 231 in the base plate 1. The holes 1A and 1B are arranged in the longitudinal direction.

  The holes 1A and 1B are used when the coil 3 is fixed to the substrate 2. As shown in FIG. 16, a jig (bobbin) 100 is used when fixing the coil 3 to the substrate 2. The jig 100 includes a base 101 and bosses 102 and 103 protruding downward from the base 101. The boss 102 has a cross-sectional shape corresponding to the hole 1A, and the boss 103 has a cross-sectional shape corresponding to the hole 1B.

  The coil 3 is placed on the substrate 2 by passing the boss 102 of the jig 100 with the coil 3 wound around the base 101 through the hole 1A and the boss 103 through the hole 1B. At this time, as described above, since the adhesive is applied to the notches C1 and C2 of the substrate 2, the coil 3 is fixed to the base plate 1. Thereafter, the jig 100 is removed from the coil 3.

  Since the holes 1A and 1B have different shapes, the jig 100 can be easily faced in the fixing operation of the coil 3.

  Further, as shown in FIG. 15, a notch recess C <b> 3 is provided in each of the side portions facing the short direction of the base plate 1. In the example of FIG. 15, three notch recesses C3 are provided in the longitudinal direction for each side portion.

  On the other hand, as shown in FIG. 1, the case 4 has side portions 42 that face each other in the lateral direction. Each side surface portion 42 has a convex portion 4A protruding downward. Four convex portions 4A are provided side by side in the longitudinal direction for each side surface portion 42.

  And each convex part 4A is fitted by each corresponding notch recessed part C3. That is, a notch C3 is provided in each of the side portions of the base plate 1 facing in the short direction, the case 4 has side portions 42 facing in the short direction, and the side portions 42 are respectively The protrusion 4A protrudes downward, and the protrusion 4A is fitted into the cutout recess C3. Thereby, when the case 4 is fixed to the base plate 1, the alignment of the case 4 is facilitated.

<8. Other>
As mentioned above, although embodiment of this invention was described, if it is in the range of the meaning of this invention, embodiment can be variously changed.

  For example, the damper member is not limited to an annular shape, and may be two rod-like members extending in the longitudinal direction. That is, it is good also as only the part corresponded to 12 A of 1st longitudinal parts and the 2nd longitudinal part 12B mentioned above.

  Further, the weight included in the vibrating body is not limited to a rectangular parallelepiped shape, and may have an elliptical shape having a major axis in the longitudinal direction and a minor axis in the lateral direction as viewed from above.

  The present invention can be used for a vibration motor provided in, for example, a smartphone, a wearable device, and the like.

  DESCRIPTION OF SYMBOLS 1 ... Base plate, 2 ... Board | substrate, 3 ... Coil, 4 ... Case, 5 ... Static part, 6 ... Magnet, 7 ... Back yoke, 8 ... Weight, DESCRIPTION OF SYMBOLS 9 ... Pole piece, 10 ... Vibration body, 11 ... Elastic member, 12 ... Damper member, D1, D2 ... Lower damper member, 15 ... Vibration motor, 100 ... Jig (bobbin), A ... Bonding part, B ... First jig, C ... Second jig

Claims (13)

A stationary part having a base plate, a substrate, a coil, and a case;
A vibrating body including a magnet, a back yoke, and a weight, and supported so as to be able to vibrate in a vertical direction with respect to the stationary portion;
An elastic member;
A damper member;
With
The substrate is disposed on the base plate;
The coil is disposed on the substrate;
The magnet is disposed so as to be accommodated by vibration on the inner peripheral side of the annular coil,
The back yoke is disposed on the magnet;
The weight is disposed on the back yoke;
The case houses the coil, the magnet, the back yoke, and the weight,
The elastic member is disposed between the case and the weight;
The weight extends in a longitudinal direction perpendicular to the vertical direction in a plan view in the vertical direction,
The direction perpendicular to the vertical direction and the longitudinal direction is the short direction of the weight,
The elastic member is
A first extending portion extending in the longitudinal direction;
A second extending portion extending in the longitudinal direction;
A first connecting portion that connects one end of the first extending portion and one end of the second extending portion;
A second connecting portion connecting the other end of the first extending portion and the other end of the second extending portion;
A third extending portion extending in the longitudinal direction and facing the first extending portion in the short direction;
A fourth extending portion extending in the longitudinal direction;
A third connecting portion that connects one end of the third extending portion and one end of the fourth extending portion;
A fourth connecting portion connecting the other end of the third extending portion and the other end of the fourth extending portion;
A fifth connecting portion for connecting a longitudinally inner portion of the first extending portion and a longitudinally inner portion of the third extending portion in the short direction;
Have
The first extending portion is inclined upward as it goes from the inside in the longitudinal direction to both ends,
The second extending portion is inclined upward as it goes inward in the longitudinal direction from both ends,
The third extending portion is inclined upward as it goes from the inside in the longitudinal direction to both end portions,
The fourth extending portion is inclined upward as it goes from both ends toward the inside in the longitudinal direction,
The second extending portion has a first fixing portion at the top of the slope,
The fourth extending portion has a second fixing portion at the top of the slope,
The fifth connecting portion is fixed to an upper surface of the weight;
The first fixing part and the second fixing part are fixed to the case,
The damper member is fixed to the upper surface of the weight;
The damper member is
In plan view in the up-down direction, the first extending portion overlaps the first fixing portion in the second extending portion from the one side in the longitudinal direction to the other side in the longitudinal direction of the first fixing portion in the second extending portion. A first longitudinal portion extending in a direction;
In a plan view in the up-down direction, the longitudinal direction overlaps from one side in the longitudinal direction of the second fixing portion in the fourth extending portion to the second fixing portion and the other side in the longitudinal direction of the second fixing portion in the fourth extending portion. A second longitudinal portion extending in the direction,
The vibration motor, wherein an inner portion composed of the first extending portion, the third extending portion, and the fifth connecting portion directly faces the upper surface of the weight in a plan view in the vertical direction. A stationary part having a base plate, a substrate, a coil, and a case;
A vibrating body including a magnet, a back yoke, and a weight, and supported so as to be able to vibrate in a vertical direction with respect to the stationary portion;
An elastic member;
A damper member;
With
The substrate is disposed on the base plate;
The coil is disposed on the substrate;
The magnet is disposed so as to be accommodated by vibration on the inner peripheral side of the annular coil,
The back yoke is disposed on the magnet;
The weight is disposed on the back yoke;
The case houses the coil, the magnet, the back yoke, and the weight,
The elastic member is disposed between the case and the weight;
The weight extends in a longitudinal direction perpendicular to the vertical direction in a plan view in the vertical direction,
The direction perpendicular to the vertical direction and the longitudinal direction is the short direction of the weight,
The elastic member is
A first extending portion extending in the longitudinal direction;
A second extending portion extending in the longitudinal direction;
A first connecting portion that connects one end of the first extending portion and one end of the second extending portion;
A second connecting portion connecting the other end of the first extending portion and the other end of the second extending portion;
A third extending portion extending in the longitudinal direction and facing the first extending portion in the short direction;
A fourth extending portion extending in the longitudinal direction;
A third connecting portion that connects one end of the third extending portion and one end of the fourth extending portion;
A fourth connecting portion connecting the other end of the third extending portion and the other end of the fourth extending portion;
A fifth connecting portion for connecting a longitudinally inner portion of the first extending portion and a longitudinally inner portion of the third extending portion in the short direction;
Have
The first extending portion is inclined downward as it goes from the inside in the longitudinal direction to both ends,
The second extending portion is inclined downward from the both ends toward the inside in the longitudinal direction,
The third extending portion is inclined downward as it goes from the inside in the longitudinal direction to both ends,
The fourth extending portion is inclined downward from both ends toward the inside in the longitudinal direction,
The second extending portion has a first fixing portion at the bottom of the slope,
The fourth extending portion has a second fixing portion at the bottom of the slope,
The fifth connecting portion is fixed to the case;
The first fixing part and the second fixing part are fixed to the upper surface of the weight,
The damper member is fixed to the case;
The damper member is
In plan view in the up-down direction, the first extending portion overlaps the first fixing portion in the second extending portion from the one side in the longitudinal direction to the other side in the longitudinal direction of the first fixing portion in the second extending portion. A first longitudinal portion extending in a direction;
In a plan view in the up-down direction, the longitudinal direction overlaps from one side in the longitudinal direction of the second fixing portion in the fourth extending portion to the second fixing portion and the other side in the longitudinal direction of the second fixing portion in the fourth extending portion. A second longitudinal portion extending in the direction,
A vibration motor in which an inner portion composed of the first extending portion, the third extending portion, and the fifth connecting portion directly faces the case in a plan view in the vertical direction. The first longitudinal portion overlaps the entirety of the second extending portion in a plan view in the vertical direction,
3. The vibration motor according to claim 1, wherein the second longitudinal portion overlaps the entirety of the fourth extending portion in a plan view in the vertical direction.   The vibration motor according to any one of claims 1 to 3, wherein the damper member is annular.   The vibration motor according to claim 4, wherein the damper member is configured by a single member.   6. The vibration motor according to claim 1, wherein a width of the first to fourth connecting portions is wider than a width of the first to fourth extending portions. The back yoke is
A rectangular top surface having a long side in the longitudinal direction and a short side in the short direction;
A long side protruding portion protruding downward from the long side portion of the top surface portion,
There is no short side protruding part protruding downward from the short side part of the top surface part,
The vibration motor according to any one of claims 1 to 6.   The vibration motor according to any one of claims 1 to 7, wherein a through-hole penetrating in a vertical direction is provided on a surface of the back yoke to which the magnet is fixed.   The vibration motor according to any one of claims 1 to 8, wherein a lower damper member is disposed on an inner peripheral side of the coil. The substrate has a penetrating region penetrating in the vertical direction on the inner peripheral side of the coil,
The vibration motor according to any one of claims 1 to 9, wherein a plurality of notches are provided at an edge of the penetrating region.   The vibration motor according to claim 10, wherein a closed circuit pattern is provided around the penetrating region.   12. The vibration motor according to claim 10, wherein two holes that penetrate in a vertical direction having different shapes are provided in a region in the through region of the base plate. Notched recesses are provided in each of the sides facing the short direction of the base plate,
The case has side portions facing in the short direction,
Each of the side portions has a convex portion protruding downward,
The vibration motor according to claim 1, wherein the convex portion is fitted into the notch concave portion.

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