CN111316543B

CN111316543B - Vibration generating device

Info

Publication number: CN111316543B
Application number: CN201880072827.XA
Authority: CN
Inventors: 和宇庆朝邦
Original assignee: Alps Electric Co Ltd
Current assignee: Alps Alpine Co Ltd
Priority date: 2017-11-20
Filing date: 2018-11-14
Publication date: 2022-05-24
Anticipated expiration: 2038-11-14
Also published as: JP6911146B2; CN111316543A; JPWO2019098250A1; WO2019098250A1

Abstract

The vibration generating device comprises: a housing; a vibrator housed in the case; an elastic body that holds the vibrator to be capable of vibrating in a first direction and a second direction intersecting the first direction; a magnetic driving unit having a coil provided on the vibrator and a magnet provided on the housing, the magnetic driving unit driving the vibrator using a magnetic force in the first direction and the second direction; and an energizing member electrically connected to the coil to supply power to the coil from outside, wherein the elastic member is a plate spring having a bent structure, and has a surface shape cut so as to avoid contact with the energizing member at least in a portion close to the energizing member.

Description

Vibration generating device

Technical Field

The present invention relates to a vibration generating apparatus.

Background

Conventionally, in electronic devices such as information display devices mounted in vehicles such as portable information terminals (for example, smart phones, portable telephones, tablet terminals, and the like), game machines, and automobiles, vibration generating devices capable of generating vibrations for providing various information reception (for example, call information reception, mail information reception, and SNS information reception) notifications to users in a tactile sense and feedback to user operations have been used.

As such a vibration generating device, for example, patent document 1 listed below discloses a vibration generating device configured to support a vibration body configured by an electromagnet so as to be capable of vibrating via an elastic support portion, the vibration body vibrating in the vertical direction at a first resonance frequency, and the vibration body vibrating in the horizontal direction at a second resonance frequency.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2016-96677

Disclosure of Invention

Technical problem to be solved by the invention

However, in the case where the vibrator is held so as to be capable of vibrating by the elastic body and the vibrator has a coil as in the vibration generating device disclosed in the above patent document, an energizing member (e.g., FPC or the like) needs to be used in order to supply power to the coil from the outside. However, in such a vibration generating device, when the elastic body is elastically deformed in accordance with the vibration of the vibrating body, the elastic body may contact the conductive member and damage the conductive member.

In this case, a vibration generating device capable of suppressing damage to the conductive member accompanying the vibration of the vibrating body is required.

Means for solving the problems

A vibration generating device of one embodiment comprises: a housing; a vibrator housed in the case; an elastic body that holds the vibrator to be capable of vibrating in a first direction and a second direction intersecting the first direction; a magnetic driving unit having a coil provided on the vibrator and a magnet provided on the housing, the magnetic driving unit driving the vibrator using a magnetic force in the first direction and the second direction; and an energizing member electrically connected to the coil to supply power to the coil from the outside, wherein the elastic body is a plate spring having a bent structure, and has a surface shape cut so as to avoid contact with the energizing member at least in a portion close to the energizing member.

Effects of the invention

According to one embodiment, damage to the conductive member accompanying vibration of the vibrating body can be suppressed.

Drawings

Fig. 1 is a perspective view showing a vibration generating apparatus according to a first embodiment.

Fig. 2 is a plan view showing the vibration generating device of the first embodiment (with the upper case removed).

Fig. 3 is an exploded view of the vibration generating device of the first embodiment.

Fig. 4 is a perspective view showing a vibration unit provided in the vibration generating device according to the first embodiment.

Fig. 5 is a front view showing a vibration unit provided in the vibration generating device according to the first embodiment.

Fig. 6 is a side view showing a vibration unit provided in the vibration generating device according to the first embodiment.

Fig. 7 is an exploded view of a vibration unit included in the vibration generating device according to the first embodiment.

Fig. 8 is a perspective view showing an elastic support portion provided in the vibration generating device according to the first embodiment.

Fig. 9 is a plan view showing an elastic support portion provided in the vibration generating device according to the first embodiment.

Fig. 10 is a front view showing an elastic support portion provided in the vibration generating device according to the first embodiment.

Fig. 11 is a side view showing an elastic support portion provided in the vibration generating device according to the first embodiment.

Fig. 12 is a partially enlarged view of the vibration generating device of the first embodiment.

Fig. 13 is a diagram for explaining the magnetization state of the permanent magnet provided in the vibration generating device according to the first embodiment.

Fig. 14A is a diagram for explaining the operation of the vibrator provided in the vibration generating device according to the first embodiment.

Fig. 14B is a diagram for explaining the operation of the vibrator provided in the vibration generating device according to the first embodiment.

Fig. 15 is a diagram for explaining the operation of the vibrator provided in the vibration generating device according to the first embodiment.

Fig. 16 is a diagram for explaining the operation of the vibrator provided in the vibration generating device according to the first embodiment.

Fig. 17 is a diagram for explaining the operation of the vibrator provided in the vibration generating device according to the first embodiment.

Fig. 18 is a diagram for explaining the operation of the vibrator provided in the vibration generating device according to the first embodiment.

Fig. 19 is a graph showing the vibration characteristics of the vibration generating device provided in the vibration generating device according to the first embodiment.

Fig. 20 is a perspective view showing a vibration generating apparatus according to a second embodiment.

Fig. 21 is an exploded view of the vibration generating device of the second embodiment.

Fig. 22A is an explanatory view of an elastic support portion provided in the vibration generating device according to the second embodiment.

Fig. 22B is an explanatory view of the elastic support portion provided in the vibration generating device according to the second embodiment.

Fig. 23 is an explanatory view of an elastic support portion provided in the vibration generating device according to the second embodiment.

Fig. 24A is an explanatory view showing the vibration direction of the vibrator.

Fig. 24B is an explanatory view showing the vibration direction of the vibrator.

Fig. 25 is a perspective view showing a vibration unit (a state where an FPC is attached) provided in the vibration generating device according to the second embodiment.

Fig. 26 is a front view showing a vibration unit (a state where an FPC is attached) provided in the vibration generating device according to the second embodiment.

Fig. 27 is a plan view showing a vibration unit (a state where an FPC is attached) provided in the vibration generating device according to the second embodiment.

Fig. 28 is a sectional view taken along line a-a of the vibration unit (in a state where the FPC is attached) shown in fig. 25.

Detailed Description

[ first embodiment ]

Hereinafter, a first embodiment will be described with reference to the drawings. In the first embodiment, a description will be given of a vibration generating device 10 having two vibrators.

(constitution of vibration generating apparatus 10)

Fig. 1 is a perspective view showing a vibration generating apparatus 10 according to a first embodiment. Fig. 2 is a plan view showing the vibration generating device 10 according to the first embodiment (with the upper housing 112 and the FPC160 removed). Fig. 3 is an exploded view of the vibration generating device 10 of the first embodiment. In the following description, for convenience, the Z-axis direction in the drawings is the vertical or up-down direction, the X-axis direction in the drawings is the lateral or left-right direction, and the Y-axis direction in the drawings is the front-rear direction.

The vibration generating device 10 shown in fig. 1 to 3 is a device mounted on an electronic apparatus such as a portable information terminal (for example, a smartphone, a mobile phone, a tablet terminal, or the like), a game machine, or an information display device mounted on a vehicle such as an automobile. The vibration generating device 10 is used, for example, to generate vibrations for notifying various information reception (e.g., call information reception, mail information reception, SNS information reception), vibrations for providing feedback to the user in a tactile sense with respect to user operations, and the like.

The vibration generating device 10 is configured such that the vibrator 130 provided inside the housing 110 vibrates in the vertical direction (Z-axis direction in the drawing) and the horizontal direction (X-axis direction in the drawing). In particular, the vibration generating device 10 of the present embodiment realizes vibration based on a larger number of resonance frequencies than the conventional vibration generating device. Specifically, the vibration generating device 10 of the present embodiment is configured such that the vibrator 130 and the weight 135 are arranged in the left-right direction inside the case 110 and the vibrator 130 and the weight 135 are supported by the elastic support portion 140, and the vibrator 130 and the weight 135 are vibrated in the up-down direction and the left-right direction, respectively, thereby obtaining vibrations based on a plurality of (four or more) resonance frequencies.

As shown in fig. 1 to 3, the vibration generating device 10 includes a housing 110, a vibration unit 120,

permanent magnets

151 and 152, and an FPC (Flexible Printed Circuits) 160.

The case 110 is formed by processing a metal plate, and is a substantially rectangular parallelepiped box-shaped member. The housing 110 has a lower housing 111 and an upper housing 112 that can be separated from each other. The lower case 111 is a container-shaped member having an open upper portion. The other components (the vibration unit 120, the

permanent magnets

151 and 152, and the FPC160) are incorporated into the lower case 111. The upper case 112 is a lid-like member that covers the upper opening of the lower case 111, thereby closing the upper opening of the lower case 111.

As shown in fig. 1, a plurality of (6 in total in the example shown in fig. 1) flat plate-like claw portions 112A that protrude outward and horizontally in an unfolded state are formed on the outer peripheral edge portion of the upper case 112. The distal end portion of the claw portion 112A has a horizontally long rectangular shape and a substantially T-shape. When the upper opening of the lower case 111 is closed by the upper case 112, the claw portion 112A is bent downward at a right angle, and the rectangular tip portion is fitted into the opening 111B formed in the side wall portion of the lower case 111 and having substantially the same shape and substantially the same size as the claw portion 112A. Thus, the upper case is locked by the shear surface of the claw portion 112A against vertical (Z-axis direction in the drawing), horizontal (X-axis direction in the drawing), and front-back (Y-axis direction in the drawing) movements of the lower case 111. That is, the upper case 112 is reliably fixed to the lower case 111.

The vibration unit 120 is a unit that generates vibration inside the housing 110. The vibration unit 120 includes a vibration body 130, a weight 135, and an elastic support portion 140.

The vibrator 130 is an example of a "vibrator". The vibrator 130 includes a core 131 and a coil 132 (members constituting a "magnetic driving unit") constituting a prismatic electromagnet, and the vibrator 130 actively vibrates in the vertical direction (Z-axis direction in the drawing) and the horizontal direction (X-axis direction in the drawing) inside the case 110 by generating an alternating magnetic field around the electromagnet.

The weight 135 is an example of a "vibrating body". The weight 135 is a prismatic member having a constant weight, and is a portion that performs follow-up vibration in the vertical direction (Z-axis direction in the drawing) and the horizontal direction (X-axis direction in the drawing) in accordance with the vibration of the vibrator 130 in the case 110.

The elastic support portion 140 supports the vibrator 130 and the weight 135 in parallel with each other inside the case 110, and elastically deforms in the vertical direction (Z-axis direction in the drawing) and the horizontal direction (X-axis direction in the drawing), thereby enabling vibrations in the vertical direction (Z-axis direction in the drawing) and the horizontal direction (X-axis direction in the drawing) to be performed by the vibrator 130 and the weight 135.

The

permanent magnets

151 and 152 constitute a "magnetic drive unit". The

permanent magnets

151 and 152 are provided to generate attractive and repulsive forces between the vibrator 130 and the interior of the housing 110. The permanent magnet 151 is provided so as to face one end (end on the negative side of the Y axis in the figure) of the core 131 of the vibrator 130. The permanent magnet 152 is provided so as to face the other end (end on the Y-axis positive side in the drawing) of the core 131 of the vibrator 130.

The FPC160 is an example of an "energizing member" that can energize the coil 132 from the outside. The FPC160 is a member for connecting the coil 132 of the vibrator 130 to an external circuit (not shown) in order to supply an alternating current to the coil 132. The FPC160 is a film-like member having a structure in which a wiring made of a metal film is sandwiched by a resin material such as polyimide. The FPC160 has flexibility and thus can be bent or flexed. The FPC160 is disposed inside the housing 110 except for an end portion on the external circuit side thereof. On the other hand, an end portion of FPC160 on the external circuit side is exposed to the outside of case 110 from opening 110A formed in case 110 (between lower case 111 and upper case 112). An electrode terminal made of a metal film for electrical connection to an external circuit is formed in the exposed portion.

The vibration generating device 10 configured as described above can generate an alternating magnetic field around the coil 132 by supplying an alternating current from an external circuit (not shown) to the coil 132 provided in the vibrator 130 through the FPC 160. Accordingly, the vibrator 130 elastically deforms the elastic support portion 140 that supports the vibrator 130 by the attractive and repulsive forces generated between the vibrator 130 and the

permanent magnets

151 and 152, and actively vibrates in the vertical direction (Z-axis direction in the drawing) and the horizontal direction (X-axis direction in the drawing). The weight 135 elastically deforms the elastic support portion 140 that supports the weight 135, and vibrates in a vertical direction (Z-axis direction in the drawing) and a horizontal direction (X-axis direction in the drawing) as the vibrator 130 vibrates. The vibration generating device 10 can realize vibration based on a plurality of (four or more) resonance frequencies by the combined vibration caused by the vibration of the vibrator 130 and the vibration of the weight 135. The specific configuration of the vibration unit 120 will be described later with reference to fig. 4 to 7. The specific structure of the elastic support portion 140 will be described later with reference to fig. 8 to 11. The specific configuration of the

permanent magnets

151 and 152 will be described later with reference to fig. 13 and 14. The specific operation of the vibration unit 120 will be described later with reference to fig. 15 to 18.

(constitution of vibration unit 120)

Fig. 4 is a perspective view showing the vibration unit 120 provided in the vibration generating device 10 according to the first embodiment. Fig. 5 is a front view showing the vibration unit 120 included in the vibration generating apparatus 10 according to the first embodiment. Fig. 6 is a side view showing the vibration unit 120 included in the vibration generating device 10 according to the first embodiment. Fig. 7 is an exploded view of the vibration unit 120 included in the vibration generating device 10 according to the first embodiment.

As shown in fig. 4 to 7, the vibration unit 120 includes a core 131, a coil 132, a flange 133, a flange 134, a weight 135, and an elastic support portion 140. The core 131, the coil 132, and the weight 135 are each a member extending in the front-rear direction (second direction, Y-axis direction in the drawing) intersecting the lateral direction (first direction, X-axis direction in the drawing) which is the vibration direction of the vibrator 130.

The core 131 and the coil 132 constitute the vibrator 130. The core 131 is a prismatic member formed of a ferromagnetic material such as iron. The coil 132 is formed by multi-winding a wire around the core 131. The wire forming the coil 132 is preferably made of a material having relatively low resistance, for example, a copper wire covered with an insulator. The electric wires forming the coil 132 are connected to the FPC160 by soldering or the like.

The vibrator 130 supplies current from an external circuit to the coil 132 via the FPC160, thereby generating an alternating magnetic field around the vibrator 130. Thereby, one end of the core 131 of the vibrator 130 and the other end of the core 131 are magnetized to different magnetic poles from each other, and the one end of the core 131 and the other end of the core 131 are alternately magnetized to N-pole and S-pole, respectively.

The weight 135 is a prismatic member having a constant weight and arranged in parallel with the vibrator 130. For example, in order to secure a sufficient weight, a metal material is used in the weight 135. In particular, the weight 135 preferably uses a metal material having a relatively high specific gravity. For example, in the present embodiment, as a preferable example of the metal material having a relatively high specific gravity, tungsten having a higher specific gravity than iron used for magnetic core 131 and copper used for coil 132 is used for weight 135. Since both ends of the weight 135 of the present embodiment are held by the elastic support portions 140 in the same manner as the magnetic core 131 of the vibrator 130, the weight has substantially the same length as the magnetic core 131 in the longitudinal direction (Y-axis direction in the drawing).

The

flanges

133 and 134 are members made of, for example, an insulating material. The flange 133 holds one end (end on the Y-axis negative side in the figure) of the core 131 in a core holding portion 336a opened in a rectangular shape. The flange 134 holds the other end (the end on the Y-axis positive side in the drawing) of the core 131 in a core holding portion 337a opened in a rectangular shape.

Two columnar protrusions are formed on the upper surfaces of the

flanges

133 and 134, respectively. The end portions of the electric wires forming the coil 132 are wound around the respective protrusions, and thus the end portions can be collectively held. Further, each protrusion is fitted into, for example, a circular opening formed in the FPC160, whereby the FPC160 can be positioned at a predetermined position and stably held.

The elastic support portion 140 is a member formed by processing a metal plate having elasticity into a predetermined shape. The elastic support portion 140 supports the vibrator 130 (the core 131 is held by the flanges 133 and 134) and the weight 135 in parallel with each other, and elastically deforms in the vertical direction (the Z-axis direction in the drawing) and the horizontal direction (the X-axis direction in the drawing), thereby allowing the vibrator 130 and the weight 135 to vibrate in the vertical direction (the Z-axis direction in the drawing) and the horizontal direction (the X-axis direction in the drawing).

In this way, the vibration generating device 10 of the present embodiment is configured such that the vibrator 130 and the weight 135 are arranged in the left-right direction in the vibration unit 120, and the vibrator 130 and the weight 135 are supported by the elastic support portion 140. Thus, the vibration generating device 10 of the present embodiment can realize vibration based on a plurality of (four or more) resonance frequencies by composite vibration based on active vibration of the vibrating body 130 and tracking vibration of the weight 135.

(constitution of elastic support part 140)

Fig. 8 is a perspective view showing the elastic support portion 140 provided in the vibration generating device 10 according to the first embodiment. Fig. 9 is a plan view showing the elastic support portion 140 provided in the vibration generating device 10 according to the first embodiment. Fig. 10 is a front view showing the elastic support portion 140 provided in the vibration generating device 10 according to the first embodiment. Fig. 11 is a side view showing the elastic support portion 140 provided in the vibration generating device 10 according to the first embodiment.

As shown in fig. 8 to 11, the elastic support portion 140 includes a first holding portion 141, a second holding portion 142, a first spring portion 143, a second spring portion 144, and a third spring portion 145. The elastic support portion 140 includes the above-described components 141 to 145, and is integrally formed from a single metal plate.

The first holding portion 141 is a tray-like portion that holds the vibrator 130. The first holding portion 141 has a substantially rectangular shape when viewed from above. The first holding portion 141 has a first wall portion 141a and a second wall portion 141 b. The first wall 141a is a wall-shaped portion that is vertically provided at one short side portion (a short side portion on the Y-axis negative side in the drawing) of the first holding portion 141, and holds one end of the core 131 constituting the vibrator 130 in a rectangular opening. The second wall portion 141b is a wall-shaped portion that is provided so as to stand upright on the other short side portion (the short side portion on the Y-axis positive side in the figure) of the first holding portion 141, and holds the other end of the core 131 constituting the vibrator 130 in the rectangular opening. The first wall portion 141a and the second wall portion 141b can fixedly hold both end portions of the core 131 by, for example, enlarging both end portions of the core 131 or caulking a rectangular opening.

The second holding portion 142 is a tray-like portion that holds the counterweight 135. The second holding portion 142 has a substantially rectangular shape when viewed from above. The second holding portion 142 includes a first wall portion 142a and a second wall portion 142 b. The first wall portion 142a is a wall-shaped portion that is provided to stand upright on one short side portion (a short side portion on the Y-axis negative side in the drawing) of the second holding portion 142, and is a portion that holds one end of the weight 135 in a rectangular opening. The second wall portion 142b is a wall-shaped portion that is provided so as to stand upright on the other short side portion (the short side portion on the Y-axis positive side in the drawing) of the second holding portion 142, and is a portion that holds the other end of the counterweight 135 in the rectangular opening. The first wall portion 142a and the second wall portion 142b can fixedly hold both end portions of the weight 135 by, for example, enlarging both end portions of the weight 135 or caulking a rectangular opening.

The first spring portion 143 is an example of a "first elastic body". The first spring portion 143 is provided on the outer side (X-axis positive side in the drawing) of the first holding portion 141 in the left-right direction, and is a portion formed by bending a metal plate connected to a long side portion on the outer side (X-axis positive side in the drawing) of the first holding portion 141a plurality of times in the up-down direction (Z-axis direction in the drawing) along a bending line (an example of a bent portion) in the front-back direction (Y-axis direction in the drawing). As shown in fig. 10, the first spring portion 143 has a bent structure having a shape in which two

peak portions

143a and 143b are connected in the lateral direction (X-axis direction in the drawing) when viewed from the front or the rear. The first spring portion 143 functions as a so-called leaf spring, and the first spring portion 143 is elastically deformed to vibrate the vibrating body 130 in the vertical direction (Z-axis direction in the drawing) and the horizontal direction (X-axis direction in the drawing).

The second spring portion 144 is an example of an "elastic body". The second spring portion 144 is a leaf spring-like portion formed by bending a metal plate connected to a long side portion inside (X axis negative side in the figure) the first holding portion 141 and a long side portion inside (X axis positive side in the figure) the second holding portion 142a plurality of times in the vertical direction (Z axis direction in the figure) along a bending line (an example of a bent portion) in the front-rear direction (Y axis direction in the figure) between the first holding portion 141 and the second holding portion 142. As shown in fig. 10, the second spring portion 144 has a bent structure having a shape in which the two

ridges

144a and 144b are connected to each other in the lateral direction (X-axis direction in the figure) when viewed from the front or rear. The second spring portions 144 function as so-called leaf springs, and the second spring portions 144 are elastically deformed to thereby realize the vertical (Z-axis direction in the drawing) and horizontal (X-axis direction in the drawing) vibrations of the weight 135 associated with the vibrations of the vibrator 130.

The third spring portion 145 is an example of an "elastic body". The third spring portion 145 is provided on the outer side (X-axis negative side in the drawing) of the second holding portion 142 in the left-right direction, and is a plate spring-like portion formed by bending a metal plate connected to a long side portion on the outer side (X-axis negative side in the drawing) of the second holding portion 142a plurality of times in the up-down direction (Z-axis direction in the drawing) along a bending line (an example of a bent portion) in the front-back direction (Y-axis direction in the drawing). As shown in fig. 10, the third spring portion 145 has a bent structure having a shape in which two

peak portions

145a and 145b are connected in the lateral direction (X-axis direction in the drawing) when viewed from the front or the rear. The third spring portion 145 functions as a so-called leaf spring, and the third spring portion 145 is elastically deformed, whereby the weight 135 can vibrate in the vertical direction (Z-axis direction in the drawing) and the horizontal direction (X-axis direction in the drawing).

Here, since each of the spring portions 143 to 145 has a bent structure, it has a characteristic that it is easily deformed in a direction (X-axis direction and Z-axis direction in the drawing) orthogonal to the bending line but is hardly deformed in a direction (Y-axis direction in the drawing) along the bending line. Therefore, the spring portions 143 to 145 elastically deform in the left-right direction (X-axis direction in the figure) by expansion and contraction and elastically deform in the up-down direction (Z-axis direction in the figure) by deflection, but the elastic deformation in the front-back direction (Y-axis direction in the figure) is suppressed.

For example, when the vibrator 130 vibrates largely in the vertical direction, the first spring portion 143 and the second spring portion 144 mainly flex largely in the vertical direction. For example, when the vibrator 130 vibrates largely in the left-right direction, the first spring portion 143 and the second spring portion 144 mainly expand and contract largely in the left-right direction.

For example, when the weight 135 vibrates largely in the vertical direction, the second spring portion 144 and the third spring portion 145 mainly flex largely in the vertical direction. For example, when the weight 135 largely vibrates in the left-right direction, the second spring portion 144 and the third spring portion 145 largely expand and contract in the left-right direction.

Further, since the spring portions 143 to 145 have a bent structure, elastic deformation in the left-right direction (X-axis direction in the figure) due to expansion and contraction is easier than elastic deformation in the up-down direction (Z-axis direction in the figure) due to deflection. Therefore, for example, when the elastic modulus in the lateral direction (X-axis direction in the figure) of each of the spring portions 143 to 145 is set as a first elastic modulus, and the elastic modulus in the vertical direction (Z-axis direction in the figure) of each of the spring portions 143 to 145 is set as a second elastic modulus, the first elastic modulus and the second elastic modulus are different from each other.

As shown in fig. 8 to 11, an opening is formed in each of the planar portions (i.e., each of the planar portions forming the inclined surface of each of the ridge portions) forming each of the spring portions 143 to 145. The shape and size of each opening are determined by simulation or the like to obtain a target elastic coefficient. For example, a trapezoidal opening portion having a relatively small size is formed in the flat surface portion constituting the first spring portion 143. In addition, a trapezoidal opening portion having a relatively neutral size is formed in the flat surface portion constituting the second spring portion 144. In addition, a trapezoidal opening portion having a relatively large size is formed in the flat surface portion constituting the third spring portion 145. Thus, the spring portions 143 to 145 have different elastic coefficients. Specifically, the first spring portion 143 has a higher spring constant than the second spring portion 144, and the second spring portion 144 has a higher spring constant than the third spring portion 145. This is because the vibrator 130 actively vibrates, while the weight 135 vibrates following it, and therefore, in order to obtain a sufficient vibration amount of the weight 135, the

spring portions

144 and 145 connected to the second holding portion 142 holding the weight 135 have relatively large opening portions and are easily elastically deformed. By adjusting the size of the opening in this way, the spring portions 143 to 145 can be integrally formed with the elastic support portion 140 without adjusting the elastic coefficient by the plate thickness or material, thereby reducing the manufacturing cost and stabilizing the quality. The elastic modulus can also be adjusted by adjusting the length of each spring portion 143 to 145 in the front-rear direction (Y-axis direction in the drawing), but when the length in the front-rear direction is small, the vibration of the vibrator 130 in the front-rear direction tends to increase. In contrast, by adjusting the size of the opening, the elastic modulus can be adjusted while suppressing vibration in the front-rear direction without reducing the length in the front-rear direction. Therefore, it can be said that the spring portions 143 to 145 preferably use a method of adjusting the elastic modulus through the opening portion.

As shown in fig. 8 to 11, each of the planar portions (i.e., each of the planar portions forming the inclined surface of each of the ridge portions) forming the spring portions 143 to 145 has a trapezoidal planar shape having a short side at the upper side and a long side at the lower side. One advantage of having such a shape is that interference with the FPC160 can be avoided. This point will be described with reference to fig. 12.

Fig. 12 is a partially enlarged view of the vibration generating device 10 according to the embodiment. As shown in fig. 12, the FPC160 has a folded portion 160A, the folded portion 160A is a portion that is folded back toward the external circuit side and extends in a direction from a first direction (X-axis negative direction in the figure) to a second direction (X-axis positive direction in the figure), and the folded portion 160A protrudes toward a space inside the vibrator 130 (a space on the X-axis negative side in the figure, that is, a space between the vibrator 130 and the weight 135).

The second spring portion 144 is provided in a space inside the vibrator 130, but the second spring portion 144 (the peak portion 144b) has a trapezoidal planar shape (i.e., a planar shape gradually cut toward the center side as it goes toward the upper side). Therefore, the second spring portion 144 can be elastically deformed in the vertical direction and the horizontal direction while avoiding interference with the folded portion 160A by the cut portion.

Thus, the vibration generating device 10 of the present embodiment can suppress damage to the FPC160 caused by the vibration of the vibrator 130 and the weight 135.

In particular, the vibration generating device 10 of the present embodiment includes two vibrators (the vibrator 130 and the weight 135), and each spring portion is more easily elastically deformed than other vibration generating devices, and therefore, the effect of avoiding interference with the folded portion 160A due to the trapezoidal planar shape is more significant.

In addition, since the second spring portion 144 of the vibration generating device 10 of the present embodiment connects the vibrator 130 and the weight 135 and is more easily elastically deformed than other spring portions, the effect of avoiding interference with the folded portion 160A due to the trapezoidal planar shape is more significant.

Further, each spring portion of the vibration generating device 10 of the present embodiment has a plurality of bent portions, and each spring portion is more easily elastically deformed than other vibration generating devices, and therefore, the effect of avoiding interference with the folded portion 160A due to the trapezoidal planar shape is more remarkable.

The outermost flat surface portions located on both the left and right sides of the elastic support portion 140 have vertical flat surface portions at both ends in the front-rear direction (Y-axis direction in the drawing), and the flat surface portions are fixed to the inner surface of the side wall portion of the housing 110 (lower housing 111) by an arbitrary fixing member (for example, an adhesive, a rivet, a screw, a caulking, or the like). Thereby, the elastic support portion 140 is fixed in the case 110 while maintaining the vibrator 130 and the weight 135 in a state capable of vibrating.

(magnetization state of permanent magnet 151)

Fig. 13 is a diagram for explaining the magnetization state of the permanent magnet 151 provided in the vibration generating device 10 according to the first embodiment. Here, the magnetization state of the permanent magnet 151 when the permanent magnet 151 is viewed from the negative Y-axis side in the drawing will be described.

As shown in fig. 13, the permanent magnet 151 is divided into two regions by a diagonal line from the upper left corner to the lower right corner when viewed from the negative Y-axis side in the drawing, and the two regions are magnetized to have mutually different polarities. In the example shown in fig. 13, the first magnetized region 151a, which is the lower left region of the permanent magnet 151, is magnetized to the S-pole, and the second magnetized region 151b, which is the upper right region of the permanent magnet 151, is magnetized to the N-pole.

Although not shown, the permanent magnet 152 facing the permanent magnet 151 with the vibrator 130 interposed therebetween is divided into two regions (a first magnetization region and a second magnetization region) by a diagonal line from the upper left corner to the lower right corner when viewed from the negative Y-axis side in the drawing, as in the case of the permanent magnet 151. However, in the permanent magnet 152, the first magnetization region, which is the lower left region, is magnetized to the N-pole, and the second magnetization region, which is the upper right region, is magnetized to the S-pole, in contrast to the permanent magnet 151.

(operation of vibrating body 130)

Fig. 14A and 14B are diagrams for explaining the operation of the vibrator 130 included in the vibration generating device 10 according to the first embodiment.

In the vibration generating device 10 of the present embodiment, an alternating magnetic field is generated around the vibrator 130 by passing an alternating current through the coil 132 constituting the vibrator 130, and both ends of the core 131 are magnetized so that both ends of the core 131 have different polarities from each other.

For example, as shown in fig. 14A, when one end (end on the negative side of the Y axis in the figure) of the core 131 is magnetized to the N pole, an attractive force that is attracted by the first magnetization region 151a (S pole) of the permanent magnet 151 and a repulsive force that repels the second magnetization region 151b (N pole) of the permanent magnet 151 are generated at the one end of the core 131. At the same time, at the other end of the magnetic core 131 magnetized to S-pole, an attractive force attracted by the first magnetized region (N-pole) of the permanent magnet 152 and a repulsive force repelling the second magnetized region (S-pole) of the permanent magnet 152 are generated. Thereby, the vibrator 130 moves in the left direction (the direction of arrow D1 in the figure) and the lower direction (the direction of arrow D2 in the figure) while elastically deforming the elastic support portion 140.

On the other hand, as shown in fig. 14B, when one end (the end on the negative side of the Y axis in the figure) of the core 131 is magnetized to the S-pole, an attractive force that is attracted by the second magnetized region 151B (N-pole) of the permanent magnet 151 and a repulsive force that is repulsive to the first magnetized region 151a (S-pole) of the permanent magnet 151 are generated at the one end of the core 131. At the same time, at the other end of magnetic core 131 magnetized to the N-pole, an attractive force attracted by the second magnetized region of permanent magnet 152 and a repulsive force repelling the first magnetized region of permanent magnet 152 are generated. Thereby, the vibrator 130 moves in the right direction (the direction of arrow D3 in the figure) and in the upper direction (the direction of arrow D4 in the figure) while elastically deforming the elastic support portion 140.

In this way, in the vibration generating device 10 of the present embodiment, the moving direction of the vibrator 130 is determined to be the left direction and the lower direction, or the right direction and the upper direction, according to the direction in which the current is caused to flow through the coil 132. Therefore, in the vibration generating device 10 of the present embodiment, when an alternating current is supplied to the coil 132, the movement of the vibrator 130 in the left direction (the direction of the arrow D1 in the figure) and the lower direction (the direction of the arrow D2 in the figure) as shown in fig. 14A is alternately repeated, and the movement of the vibrator 130 in the right direction (the direction of the arrow D3 in the figure) and the upper direction (the direction of the arrow D4 in the figure) as shown in fig. 14B is repeated. Thereby, the vibrator 130 actively vibrates in the vertical direction (Z-axis direction in the drawing) and the horizontal direction (X-axis direction in the drawing).

(operation of the vibration unit 120)

Fig. 15 to 18 are diagrams for explaining the operation of the vibration unit 120 included in the vibration generating device 10 according to the embodiment. In fig. 15 to 18, solid arrows indicate relatively large vibrations, and broken arrows indicate relatively small vibrations.

Fig. 15 is a diagram illustrating an operation of the vibration unit 120 at the first resonance frequency of the vibration generating device 10. As shown in fig. 15, when the vibrator 130 is driven at the first resonance frequency, the vibrator 130 and the weight 135 largely vibrate in the vertical direction (Z-axis direction in the drawing) to approximately the same extent as each other, and thus, by the composite vibration based on these vibrations, large vibration in the vertical direction (Z-axis direction in the drawing) can be obtained as the entire vibration generating apparatus 10.

Fig. 16 is a diagram illustrating an operation of vibration section 120 at the second resonance frequency of vibration generating apparatus 10. As shown in fig. 16, when the vibrator 130 is driven at the second resonance frequency, the vibrator 130 and the weight 135 largely vibrate in the left-right direction (X-axis direction in the drawing) to approximately the same extent, and thus, by the composite vibration based on these vibrations, large vibration in the left-right direction (X-axis direction in the drawing) can be obtained as the whole vibration generating device 10.

Fig. 17 is a diagram illustrating an operation of the vibration unit 120 at the third resonance frequency of the vibration generating apparatus 10. As shown in fig. 17, when the vibrator 130 is driven at the third resonance frequency, the vibrator 130 vibrates largely in the vertical direction (Z-axis direction in the drawing), while the weight 135 vibrates slightly in the vertical direction (Z-axis direction in the drawing), so that the vibration generating device 10 as a whole can obtain large vibration in the vertical direction (Z-axis direction in the drawing) by composite vibration based on these vibrations.

Fig. 18 is a diagram illustrating an operation of the vibration unit 120 at the fourth resonance frequency of the vibration generating apparatus 10. As shown in fig. 18, when the vibrator 130 is driven at the fourth resonance frequency, the vibrator 130 vibrates largely in the left-right direction (X-axis direction in the drawing), while the weight 135 vibrates slightly in the left-right direction (X-axis direction in the drawing), and thus a large vibration in the left-right direction (X-axis direction in the drawing) can be obtained as the whole vibration generating device 10 by a composite vibration based on these vibrations.

The first to fourth resonance frequencies are determined by the masses of the vibrator 130 and the weight 135, the material and the plate thickness of the elastic support portion 140, the elastic coefficients of the spring portions 143 to 145 of the elastic support portion 140, and the like. Therefore, the vibration generating device 10 of the present embodiment can set the first to fourth resonance frequencies as the target frequencies or adjust the intensity of the vibration by adjusting at least one of these parameters by simulation or the like. That is, the vibration generating device 10 of the present embodiment can be applied to various applications by adjusting the resonance frequency as described above.

(vibration characteristics of vibration generating apparatus 10)

Fig. 19 is a graph showing the vibration characteristics of the vibration generating device 10 provided in the vibration generating device 10 according to the first embodiment. The vibration characteristics shown in fig. 19 were actually confirmed by the inventors by performing tests such as simulation using the vibration generating apparatus 10 of the embodiment. In the graph shown in fig. 19, the horizontal axis represents frequency, and the vertical axis represents acceleration of vibration. In the graph shown in fig. 19, the solid line indicates the vibration in the vertical direction, and the broken line indicates the vibration in the horizontal direction. As shown in fig. 19, in this test, the inventors confirmed that: the vibration generating device 10 can generate vibrations based on at least four resonance frequencies (first to fourth resonance frequencies) different from each other in a frequency band of 1kHz or less, which is more easily perceived by a living body. In this test, members having substantially the same mass as each other were used as the vibrator 130 and the weight 135.

[ second embodiment ]

Hereinafter, a second embodiment will be described with reference to the drawings. In the second embodiment, a description will be given of a vibration generating device 20 having one vibrator.

(constitution of vibration generating apparatus 20)

Fig. 20 is a perspective view showing a vibration generating device 20 according to a second embodiment. Fig. 21 is an exploded view of the vibration generating device 20 of the second embodiment.

As shown in fig. 20 and 21, the vibration generating device 20 includes a housing 110, a vibrator 130, an elastic support portion 240,

permanent magnets

151 and 152,

flanges

133 and 134, and an FPC 160. The case 110, the vibrator 130, the

permanent magnets

151 and 152, the

flanges

133 and 134, and the FPC160 are the same as those used in the vibration generating device 10 of the first embodiment (however, the details may be changed), and therefore, the description thereof will be omitted.

(constitution of elastic support 240)

Fig. 22 and 23 are explanatory views of the elastic support portion 240 provided in the vibration generating device 20 according to the second embodiment. Fig. 22A is a perspective view of the elastic support portion 240, and fig. 22B is a front view of the elastic support portion 240. Fig. 23 is a side view of the elastic support portion 240.

The elastic support portion 240 is formed by processing a metal plate having elasticity into a predetermined shape. The elastic support portion 240 has a substantially rectangular parallelepiped box-shaped holding portion 241. The vibration body 130 is accommodated and held in the holding portion 241.

The elastic support portion 240 has two spring portions 242 (an example of an "elastic body") formed by folding a metal plate extending in the left-right direction a plurality of times so that the folds are oriented in the front-rear direction. One of the two spring portions 242 extends leftward from the left end of the holding portion 241, and the other extends rightward from the right end of the holding portion 241.

Each spring portion 242 has three bent portions 41, two flat portions 42, a mounting portion 43, and an engaging claw portion 44. The bent portion 41 is a portion bent along the fold. The flat portion 42 is a substantially rectangular portion extending from one of the three folded portions 41 toward the other folded portion 41, and has sides along the direction of the fold and sides along the extending direction. The spring portion 242 is formed so that a dimension along the direction of the fold of the flat portion 42 (hereinafter simply referred to as a width dimension of the flat portion 42) is larger than a dimension along the extending direction of the flat portion 42 (hereinafter simply referred to as a length dimension of the flat portion 42). Further, a substantially rectangular opening 42a is formed in the flat portion 42 at a position avoiding the outer peripheral portion.

The leaf spring having a bent structure such as the spring portion 242 has a characteristic of being easily elastically deformed in a direction (a left-right direction and a vertical direction) orthogonal to the fold line. That is, such a leaf spring can be elastically deformed in the left-right direction by expansion and contraction, and can be elastically deformed in the up-down direction by deflection. On the other hand, such a leaf spring also has a characteristic of being difficult to deform in a direction along the fold line (front-rear direction), and is therefore suitable as a member for suppressing movement in the front-rear direction.

In addition, in the leaf spring having such a bent structure, the degree of deformation is generally different between the elastic deformation in the vertical direction due to bending and the elastic deformation in the horizontal direction due to expansion and contraction. Therefore, when the spring constant of the spring portion 242 with respect to the left-right direction is set to a first spring constant and the spring constant of the spring portion 242 with respect to the up-down direction is set to a second spring constant, the first spring constant and the second spring constant are different values.

The mounting portion 43 is formed at the front end portion of the spring portion 242. A fixed portion 43a is formed at a predetermined position of the mounting portion 43. The elastic support portion 240 is attached to the housing 110 by fixing the fixed portion 43a to the main body portion 211 of the housing 110. The elastic support portion 240 elastically deforms in the left-right direction and the up-down direction, thereby supporting the vibrator 130 to be capable of vibrating in the left-right direction and the up-down direction.

The fixed portion 43a extends in the front-rear direction. The fixed portions 43a are provided at four positions, front, rear, left, and right. For example, the four fixed portions 43a are provided at positions symmetrical with respect to the center (center in plan view) of the vibration generating device 20, and have a symmetrical configuration.

The engaging claw 44 is formed on the upper portion of the elastic support portion 240. The engaging claw portion 44 of the left spring portion 242 extends toward the left side (outer side). The engaging claw 44 of the right spring 242 extends rightward (outward). In the example shown in fig. 22, the engaging pawl portions 44 each have two pawls separated in the front-rear direction.

The vibrator 130 is supported by the elastic support portion 240, and vibrates in the left-right direction at a first natural frequency determined in accordance with the first elastic coefficient and the mass of the vibrator 130, and vibrates in the up-down direction at a second natural frequency determined in accordance with the second elastic coefficient and the mass of the vibrator 130. Further, since the first elastic modulus and the second elastic modulus have different values, the first natural frequency and the second natural frequency also have different values.

(operation of vibration generating device 20)

Next, the operation of the vibration generating device 20 will be described with reference to fig. 24A and 24B. Fig. 24A and 24B are explanatory views showing the vibration direction of the vibrator 130, and are explanatory views when the vibrator 130 and the elastic support portion 240 are viewed from the front. Fig. 24A shows the direction of vibration of the vibrator 130 when the vibrator 130 generates an alternating magnetic field having the same frequency as the first natural frequency, and fig. 24B shows the direction of vibration of the vibrator 130 when the vibrator 130 generates an alternating magnetic field having the same frequency as the second natural frequency. In fig. 24, the solid-line arrows indicate the direction in which the vibrator 130 easily vibrates, that is, the vibration direction of the vibrator 130, and the broken-line arrows indicate the direction in which the vibrator 130 hardly vibrates relatively.

As described above, the vibrator 130 is supported by the elastic support portion 240 so as to be capable of vibrating in the left-right direction and the up-down direction. The vibrator 130 vibrates in the left-right direction at a first natural frequency determined in accordance with the first elastic coefficient and the mass of the vibrator 130, and vibrates in the up-down direction at a second natural frequency determined in accordance with the second elastic coefficient and the mass of the vibrator 130.

Therefore, as shown in fig. 24A, when the vibrator 130 generates an alternating magnetic field having the same frequency as the first natural frequency, the vibrator 130 is likely to vibrate in the left-right direction. As a result, the vibrator 130 largely vibrates in the left-right direction. As shown in fig. 24B, when the vibrator 130 generates an alternating magnetic field having the same frequency as the second natural frequency, the vibrator 130 is likely to vibrate in the vertical direction. As a result, the vibrator 130 greatly vibrates in the vertical direction.

The magnetic drive unit (coil 132 and permanent magnets 151 and 152) uses the relationship between the frequency of the alternating magnetic field and the ease of vibration of the vibrator 130, and vibrates the vibrator 130 in the left-right direction with the alternating magnetic field having the same frequency as the first natural frequency, and vibrates the vibrator 130 in the vertical direction with the alternating magnetic field having the same frequency as the second natural frequency. Hereinafter, the case where the vibrator 130 is vibrated in the left-right direction by the alternating magnetic field having the same frequency as the first natural frequency will be simply referred to as driving the vibrator 130 in the left-right direction at the first natural frequency, and the case where the vibrator 130 is vibrated in the up-down direction by the alternating magnetic field having the same frequency as the second natural frequency will be simply referred to as driving the vibrator 130 in the up-down direction at the second natural frequency.

Even when an alternating magnetic field is generated at a frequency that does not match both the first natural frequency and the second natural frequency, the vibrating body vibrates in the vertical direction and the horizontal direction. When the frequency is close to the first natural frequency, the vibration is larger in the left-right direction than in the up-down direction, and when the frequency is close to the second natural frequency, the vibration is larger in the up-down direction than in the left-right direction. In addition, since the harmonic wave of the given frequency also contributes to the vibration in the case of the alternating magnetic field by the pulse wave, the harmonic wave largely vibrates in the left-right direction at a frequency that is identical to or close to the first natural vibration frequency, specifically, at a frequency that is 1/N times the first natural vibration frequency (where N is an integer, for example, 3, the same applies hereinafter), and largely vibrates in the up-down direction at a frequency that is 1/M times the second natural vibration frequency (where M is an integer, for example, 3, the same applies hereinafter).

Next, a method of stabilizing the vibration operation of the vibrator 130 will be described. As described above, the leaf spring having a bent structure such as the spring portion 242 is easily elastically deformed in the direction perpendicular to the fold line, but is hardly deformed in the direction along the fold line. Therefore, in the present embodiment, the characteristic of the leaf spring having such a bent structure is utilized to suppress the deformation of the spring portion 242 in the front-rear direction. In addition, this suppresses the movement of the vibrator 130 in the front-rear direction, and stabilizes the vibration operation of the vibrator 130 in the left-right direction and the up-down direction.

In the leaf spring having such a bent structure, the larger the width of the flat portion 42 is compared with the length of the flat portion 42, the more difficult it is to deform in the direction along the fold. In the present embodiment, by utilizing the characteristic of the leaf spring having such a bent structure, the spring portion 242 is formed such that the width dimension of the flat portion 42 is larger than the length dimension of the flat portion 42, and thereby deformation of the spring portion 242 in the front-rear direction is easily suppressed.

In the leaf spring having such a bent structure, the outer peripheral portion of the flat portion 42 has a large influence on the degree of difficulty of deformation of the elastic support portion 240 in the direction along the fold line, but the influence of the portion of the flat portion 42 that is away from the outer peripheral portion (the portion closer to the central portion) is smaller than the influence of the outer peripheral portion of the flat portion 42. On the other hand, by forming the opening 42a in the portion of the flat portion 42 that is not in the outer peripheral portion, the mechanical strength of the flat portion 42 with respect to the direction (the left-right direction and the up-down direction) orthogonal to the fold line can be reduced, and the elastic support portion 240 can be easily elastically deformed in the direction orthogonal to the fold line.

In the present embodiment, by utilizing the characteristics of the leaf spring having such a bent structure, the opening 42a is formed in the flat portion 42 at a position avoiding the outer peripheral portion, whereby the spring portion 242 can be easily suppressed from being deformed in the front-rear direction and can be easily elastically deformed in the left-right direction and the up-down direction. Further, by adjusting the size of the opening 42a, the ease of elastic deformation of the spring portion 242 in the left-right direction and the up-down direction can be adjusted.

As described above, in the vibration generating device 20 of the present embodiment, the spring portion 242 is a plate spring in which the plurality of bent portions 41 and the two substantially rectangular flat portions 42 extending from one of the plurality of bent portions 41 to the other are formed, and the plurality of bent portions 41 are the plurality of bent portions 41 in which the fold lines are bent along the front-rear direction (third direction) orthogonal to the left-right direction (first direction) and the up-down direction (second direction). The leaf spring having such a folded structure is characterized in that it is easily elastically deformed in a direction perpendicular to the fold line, but is hardly deformed in a direction along the fold line. Therefore, the spring portion 242 can be easily elastically deformed in the left-right direction and the up-down direction, and deformation of the spring portion 242 in the front-back direction can be suppressed. As a result, even if a force in the front-rear direction is applied to the vibrator 130 by the magnetic force between the vibrator 130 and the

permanent magnets

151 and 152, the movement of the vibrator 130 in the front-rear direction can be suppressed, and the vibration operation of the vibrator 130 in the left-right direction and the up-down direction can be stabilized.

In the vibration generating device 20 of the present embodiment, the magnetic driving unit (the coil 132 and the permanent magnets 151 and 152) drives the vibrator 130 at the first natural frequency corresponding to the first elastic coefficient and the mass of the vibrator 130, so that the vibrator 130 can be easily vibrated in the left-right direction and the vibrator 130 can be hardly vibrated in the up-down direction. Further, the magnetic driving unit (the coil 132 and the permanent magnets 151 and 152) drives the vibrator 130 at the second natural frequency corresponding to the second elastic coefficient and the mass of the vibrator 130, so that the vibrator 130 can be easily vibrated in the vertical direction and the vibrator 130 can be hardly vibrated in the horizontal direction. As a result, the vibration operation of the vibrator 130 can be stabilized, and a desired vibration operation of the vibrator 130 in the left-right direction and the up-down direction can be realized.

(planar shape of spring part 242)

Fig. 25 is a perspective view showing the vibration unit 220 (in a state where the FPC160 is attached) provided in the vibration generating device 20 according to the second embodiment. Fig. 26 is a front view showing the vibration unit 220 (in a state where the FPC160 is attached) provided in the vibration generating device 20 according to the second embodiment. Fig. 27 is a plan view showing the vibration unit 220 (in a state where the FPC160 is attached) provided in the vibration generating device 20 according to the second embodiment. Fig. 28 is a sectional view taken along line a-a of vibration unit 220 (in a state where FPC160 is attached) shown in fig. 25.

As shown in fig. 25 to 28, each of the flat portions (i.e., each of the flat portions 42) constituting each of the spring portions 242 has a planar shape of a trapezoidal shape having an upper side as a short side and a lower side as a long side. One advantage of having such a shape is that interference with the FPC160 can be avoided.

As shown in fig. 25 to 28, the FPC160 has a folded portion 160A, the folded portion 160A is a portion that is folded back toward the external circuit side and in a direction in which the folded portion extends from a first direction (X-axis negative direction in the drawing) to a second direction (X-axis positive direction in the drawing), and the folded portion 160A protrudes toward a space outside the vibrator 130 (space on the X-axis negative side in the drawing).

The spring portion 242 is provided in a space outside the vibrator 130, but the spring portion 242 (flat portion 42) has a trapezoidal planar shape (i.e., a planar shape gradually cut toward the center side as it goes toward the upper side).

Therefore, the spring portion 242 can be elastically deformed in the vertical direction and the horizontal direction while avoiding interference with the folded portion 160A by the cut portion.

Thus, the vibration generating device 20 of the present embodiment can suppress damage to the FPC160 caused by the vibration of the vibrator 130.

In particular, in the vibration generating device 20 of the present embodiment, each spring portion has a plurality of bent portions, and each spring portion is more easily elastically deformed than other vibration generating devices, and therefore, the effect of avoiding interference with the folded portion 160A due to the trapezoidal planar shape is more significant.

While one embodiment of the present invention has been described above in detail, the present invention is not limited to the embodiment, and various modifications and changes can be made within the scope of the present invention described in the claims.

For example, in the above embodiment, the planar shape of each spring portion is a trapezoidal shape, but the planar shape of each spring portion is not limited to this, and may be a planar shape having a cut away portion so as to avoid contact with the conductive member at least in a portion close to the conductive member.

In the above embodiment, all the spring portions are formed in the trapezoidal shape, but the present invention is not limited to this, and for example, only the spring portions that may come into contact with the energizing member may be formed in the trapezoidal shape.

In the above-described embodiment, the FPC is used as an example of the conductive member, but the present invention is not limited thereto, and for example, a wire or the like may be used as the conductive member.

The configuration of each spring portion (for example, the number of times of bending, the planar shape, the size, the presence or absence of the opening, and the like) is not limited to the configuration described in the above embodiment. That is, the configuration of each spring portion can be appropriately changed in accordance with various specifications of the vibration generating apparatus (for example, a desired resonance frequency, a limitation on the size of the case, and the like).

In the above-described embodiment, as an example of the "surface cut so as to be able to avoid contact with the conductive member", a trapezoidal flat surface portion (flat portion) is provided in each spring portion, but the "surface cut so as to be able to avoid contact with the conductive member" is not limited to a flat surface, and may be a surface other than a flat surface (for example, a gently curved surface). In this case, it is also preferable that the surface other than the plane has a trapezoidal shape when viewed from a specific direction (for example, a perpendicular direction) in plan.

This international application is based on the priority claim of japanese patent application No. 2017-223135, applied at 11/20/2017, the entire contents of which are incorporated by reference into the present patent application.

Description of the symbols

10. 20 vibration generating device

110 casing

111 lower side casing

112 upper side casing

120. 220 vibration unit

130 vibrating body (vibrating body)

131 magnetic core

132 coil

133. 134 flange

135 balance weight (vibrating body)

140 elastic support part

141 first holding portion

142 second holding part

143 first spring part (elastic body)

144 second spring part (elastic body)

145 third spring part (elastic body)

151. 152 permanent magnet

160 FPC (electrifying component)

240 elastic support part

241 holding part

242 spring portion (elastomer)

Claims

1. A vibration generating device is characterized by comprising:

a housing;

a vibrating body accommodated in the housing;

an elastic body that holds the vibrator to be capable of vibrating in a first direction and a second direction intersecting the first direction;

a magnetic driving unit having a coil provided on the vibrator and a magnet provided on the housing, and driving the vibrator by a magnetic force in the first direction and the second direction; and

an energizing member electrically connected to the coil to supply electric power from outside to the coil,

the elastic body is a plate spring having a bent structure, and has a surface shape cut so as to avoid contact with the energizing member at least in a portion close to the energizing member,

the energizing member is constituted by a flexible printed board disposed inside the case and having a folded portion,

the plate spring is elastically deformed in the first direction and the second direction while avoiding interference with the folded portion by a portion cut out so as to avoid contact with the energizing member.

2. The vibration generating apparatus according to claim 1,

the elastic body has the trapezoidal surface shape in which one of the upper side and the lower side, which is close to the energizing member, is defined as a short side when viewed from a specific direction in a plan view.

3. The vibration generating apparatus according to claim 1 or 2,

the elastic body has a plurality of bent portions which are portions folded back in the extending direction.

4. The vibration generating apparatus according to claim 1 or 2,

the vibration generating device is provided with a plurality of the vibration bodies,

the elastic body holds the plurality of oscillating bodies to be capable of oscillating in the first direction and the second direction.