JP2018029482A - Oscillation generating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oscillation generating device capable of allowing oscillation operation of an oscillator to be stabled.SOLUTION: An oscillation generating device comprises: a housing 10; an oscillator 20 that is housed in the housing 10; an elastic supporting part 40 that oscillatably supports the oscillator 20 along with a first direction and a second direction; and a magnetic driving part 50 that drives the oscillator 20 by using a magnetic force along with the first direction and the second direction. The magnetic driving part 50 is an oscillation generating device 1 having: first magnetic field generating means that is arranged in the side of oscillator 20; and second magnetic field generation means that is arranged in the side of housing 10 so as to be positioned on an extended line of the oscillator 20 in a third direction crossing to the first direction and the second direction. The elastic supporting part 40 is constructed by a plate spring to which a plurality of folding parts that is folded so that a fold line is along with the third direction and a flat part extending toward the other one folding part from one of the plurality of folding parts.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vibration generating device, and more particularly to a vibration generating device including a vibrating body supported by a casing so as to be vibrated via an elastic support member.

  A vibration generator that is installed in electronic devices such as portable information terminals and game machines and that generates vibrations for notifying incoming calls on portable information terminals and vibrations for tactile feedback on game machines is practical. It has become.

  As a conventional vibration generator used for such an application, for example, there is one disclosed in Patent Document 1. Hereinafter, the configuration of a conventional vibration generator will be described with reference to FIG. FIG. 9 is an explanatory diagram showing a configuration of a conventional vibration generator, and shows a configuration of a conventional vibration generator 101 according to Patent Document 1. As shown in FIG. In FIG. 9, an X direction, a Y direction, and a Z direction indicate three directions that are orthogonal to each other.

  As shown in FIG. 9, the conventional vibration generator 101 according to Patent Document 1 includes a housing 110, a vibrating body 120 accommodated in the housing 110, a support body 130 that holds the vibrating body 120, and a vibrating body. The elastic support member 133 which supports 120 and the support body 130 so that vibration is possible, and the magnetic drive part 140 which drives the vibration body 120 using magnetic force are provided. The support 130 is a box-like member formed by bending a metal plate having spring properties, and has a support bottom 131 on which the vibrating body 120 is placed.

  The elastic support member 133 is a leaf spring that is formed integrally with the support 130 by bending the above-described metal plate, and includes a first elastic deformation portion 136 and a second elastic deformation portion 137. The first elastic deformation portion 136 is a portion that extends along the X direction and is bent a plurality of times so that the fold line extends along the Z direction, and elastically deforms so as to expand and contract in the X direction. The second elastic deformation portion 137 is a plate-like portion extending so as to connect the support bottom portion 131 of the support 130 and one end portion of the first elastic deformation portion 136, and is elastically deformed so as to bend in the Z direction. . The elastic support member 133 supports the vibrating body 120 by the first elastic deformation portion 136 and the second elastic deformation portion 137 so as to vibrate along the X direction and the Z direction.

  The magnetic drive unit 140 includes an electromagnet disposed on the vibrating body 120 side and a permanent magnet disposed on the housing 110 side. The electromagnet includes a magnetic core 121 disposed on the vibrating body 120 side, a magnetic yoke 122, and a coil 141 provided around the magnetic core 121, and generates an alternating magnetic field in a predetermined direction. Yes. The permanent magnets are a permanent magnet 142a and a permanent magnet 142b disposed on the housing 110 side so as to be adjacent to the vibrating body 120 along the Y direction. And the magnetic drive part 140 drives the vibrating body 120 along the X direction and the Z direction using the magnetic force between an electromagnet and a permanent magnet.

  In the vibration generator 101, the elastic support member 133 supports the vibrating body 120 so as to vibrate along the X direction and the Z direction, and the magnetic drive unit 140 drives the vibrating body 120 along the X direction and the Z direction. Thus, desired vibrations along the X direction and the Z direction are generated.

JP 2012-125730 A

  In the conventional vibration generating device 101 according to Patent Document 1, the first elastic deformation portion 136 is a portion that extends along the X direction and is bent a plurality of times so that the fold line extends along the Z direction. When the first elastic deformation portion 136 has such a structure, the first elastic deformation portion 136 not only elastically deforms along the X direction by expansion and contraction, but also elastically deforms in the Y direction by bending. . Therefore, when the balance between the force that the permanent magnet 142a pulls the vibrating body 120 and the force that the permanent magnet 142b pulls the vibrating body 120 is out of balance, the vibrating body 120 is pulled toward the permanent magnet 142a or the permanent magnet 142b. Oscillate at a position biased in the Y direction. As a result, there has been a problem that the vibration operation of the vibrating body 120 tends to become unstable.

  The present invention has been made in view of the situation of the prior art as described above, and an object thereof is to provide a vibration generator that can stabilize the vibration operation of a vibrating body.

  In order to solve this problem, the vibration generator according to claim 1 includes a housing, a vibrating body accommodated in the housing, and a first direction and a second direction in which the vibrating body is orthogonal to each other. An elastic support unit that supports the vibration body along the first direction and the second direction using a magnetic force along the first direction and the second direction, and the magnetic drive unit includes: The first magnetic field generating means disposed on the vibrating body side and the housing side so as to be positioned on an extension line of the vibrating body in a third direction orthogonal to the first direction and the second direction A second magnetic field generating means disposed on the elastic support portion, wherein the elastic support portion includes a plurality of bent portions in which a fold is bent along the third direction, and the plurality of the plurality of bent portions. A flat part extending from one of the bent parts toward the other Characterized by comprising the leaf spring but is formed.

  In the vibration generating device having this configuration, the elastic support portion includes a plurality of bent portions that are bent so that the fold line extends along a third direction orthogonal to the first direction and the second direction, and the plurality of bent portions. It consists of a leaf | plate spring in which the flat part extended toward one from the other was formed. A leaf spring having such a folding structure has a feature that it is easily deformed elastically in a direction perpendicular to the fold, but hardly deformed in a direction along the fold. Therefore, the elastic support portion can be easily elastically deformed along the first direction and the second direction, and deformation of the elastic support portion along the third direction can be suppressed. As a result, the vibration body can be prevented from moving along the third direction, and the vibration operation along the first direction and the second direction of the vibration body can be stabilized.

  The vibration generator according to claim 2 is characterized in that an opening is formed at a position avoiding the outer peripheral portion of the flat portion.

  In the vibration generating device having this configuration, the opening is formed at a position avoiding the outer peripheral portion of the flat portion, thereby suppressing the elastic deformation portion from being easily deformed along the third direction, and the first portion. It is possible to facilitate elastic deformation along the direction and the second direction. And the ease of elastic deformation along the 1st direction and 2nd direction of an elastic deformation part can be adjusted by adjusting the dimension of an opening part. As a result, the vibration body can be easily vibrated along the first direction and the second direction while the vibration operation of the vibration body is stabilized, and the ease of vibration of the vibration body can be adjusted. Become.

  The vibration generating device according to claim 3, wherein the elastic support portion is formed such that a dimension of the flat portion along the fold is larger than a dimension along the extending direction of the flat portion. It is characterized by.

  In the vibration generating device having this configuration, the elastic deformation portion is formed by forming the elastic deformation portion so that the dimension along the crease of the flat portion is larger than the dimension along the extending direction of the flat portion. Deformation along the third direction can be further suppressed, and the vibration operation of the vibrating body can be further stabilized.

  The vibration generator according to claim 4, wherein the elastic support portion has a first elastic coefficient different from the first elastic coefficient in the first direction and a second elastic coefficient different from the first elastic coefficient in the second direction. The magnetic drive unit drives the vibrating body along the first direction at a first natural frequency corresponding to the first elastic coefficient and the mass of the vibrating body; The vibrator is driven along the second direction at a second natural frequency corresponding to the second elastic coefficient and the mass of the vibrator.

  In the vibration generating device having this configuration, the magnetic driving unit drives the vibrating body at the first natural frequency corresponding to the first elastic coefficient and the mass of the vibrating body, thereby moving the vibrating body along the first direction. This makes it easy to vibrate and makes it difficult to vibrate along the second direction. Further, the magnetic drive unit drives the vibrating body at a second natural frequency corresponding to the second elastic coefficient and the mass of the vibrating body, thereby facilitating the vibrating body to vibrate along the second direction, It can be made difficult to vibrate along the first direction. As a result, it is possible to realize a desired vibration operation along the first direction and the second direction of the vibration body while stabilizing the vibration operation of the vibration body.

  The vibration generating apparatus according to claim 5, wherein the first magnetic field generating means is an electromagnet disposed on the vibrating body side so as to generate an alternating magnetic field along the third direction. The second magnetic field generating means is a permanent magnet disposed on the housing side so as to face the electromagnet along the third direction, and the permanent magnet includes the first direction and the second direction. It is characterized in that it is magnetized so that different magnetic poles are arranged along the direction.

  In the vibration generating device of this configuration, the electromagnet is attracted or repelled by one magnetic pole on the permanent magnet side and repelled or attracted by the other magnetic pole on the permanent magnet side by the alternating magnetic field generated by the electromagnet. You can make them meet each other. Then, by utilizing the magnetic force between the electromagnet and the permanent magnet, the vibrating body can be easily vibrated along the first direction and the second direction. In addition, even if a magnetic force acts between the permanent magnet and the electromagnet, the deformation along the third direction of the elastic deformation portion is suppressed, so that the vibration operation of the vibrating body can be stabilized. Therefore, such a vibration generator is suitable for driving a vibrating body using a magnetic force between an electromagnet and a permanent magnet.

  ADVANTAGE OF THE INVENTION According to this invention, the vibration generator which can stabilize the vibration operation | movement of a vibrating body can be provided.

It is the 1st explanatory view showing the composition of the vibration generator concerning the embodiment of the present invention. It is the 2nd explanatory view showing the composition of the vibration generator concerning the embodiment of the present invention. It is explanatory drawing which shows the structure of the vibrating body which concerns on embodiment of this invention. It is the 1st explanatory view showing the composition of the holding part and elastic support part concerning the embodiment of the present invention. It is the 2nd explanatory view showing the composition of the holding part and elastic support part concerning the embodiment of the present invention. It is explanatory drawing which shows the structure of the permanent magnet which concerns on embodiment of this invention. It is explanatory drawing which shows the drive direction of the magnetic drive part which concerns on embodiment of this invention. It is explanatory drawing which shows the vibration direction of the vibrating body which concerns on embodiment of this invention. It is explanatory drawing which shows the structure of the conventional vibration generator.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. FIG. 1 is a first explanatory diagram showing a configuration of a vibration generator according to an embodiment of the present invention. FIG. 1A is a perspective view showing the appearance of the vibration generator 1, and FIG. 1B is a perspective view of the vibration generator 1 with the lid 12 removed. FIG. 2 is a second explanatory view showing the configuration of the vibration generator according to the embodiment of the present invention, and is an exploded perspective view of the vibration generator 1. FIG. 3 is an explanatory diagram showing the configuration of the vibrating body according to the embodiment of the present invention, and is a perspective view of the vibrating body 20.

  FIG. 4 is a first explanatory view showing the configuration of the holding portion and the elastic support portion according to the embodiment of the present invention. FIG. 4A is a perspective view of the holding unit 30 and the elastic support unit 40, and FIG. 4B is a front view of the holding unit 30 and the elastic support unit 40. FIG. 5 is a second explanatory view showing the configuration of the holding portion and the elastic support portion according to the embodiment of the present invention. FIG. 5A is a side view of the holding portion 30 and the elastic support portion 40 as viewed from the right, and FIG. 5B is a cross-sectional view corresponding to the A1-A1 cross section of FIG. It is. FIG. 6 is an explanatory diagram showing the configuration of the permanent magnet according to the embodiment of the present invention. FIG. 6A is an exploded perspective view of the rear permanent magnet 70, and FIG. 6B is a front view of the rear permanent magnet 70.

  FIG. 7 is an explanatory view showing the drive direction of the magnetic drive unit according to the embodiment of the present invention, and is an explanatory view when the magnetic core 61 is viewed from the front. FIG. 7A shows the direction of the magnetic force exerted on the front end portion of the magnetic core 61 by the front permanent magnet 70 when the front end portion of the magnetic core 61 is magnetized to the N pole. FIG. The direction of the magnetic force which the front permanent magnet 70 exerts on the front end portion of the magnetic core 61 when the front end portion is magnetized to the south pole is shown. In FIG. 7, the solid arrow indicates the direction of the magnetic force exerted on the magnetic core 61.

  FIG. 8 is an explanatory view showing the vibration direction of the vibrating body according to the embodiment of the present invention, and is an explanatory view when the vibrating body 20, the holding portion 30, and the elastic support portion 40 are viewed from the front. FIG. 8A shows the vibration direction of the vibrating body 20 when the electromagnet 60 generates an alternating magnetic field having the same frequency as the first natural frequency, and FIG. The vibration direction of the vibrating body 20 when an alternating magnetic field having the same frequency as the natural frequency is generated is shown. In FIG. 8, the solid line arrow indicates the direction in which the vibrating body 20 is likely to vibrate, that is, the vibration direction of the vibrating body 20, and the dotted line arrow indicates the direction in which the vibrating body 20 is difficult to vibrate.

  The directions in each figure are X1 on the left, X2 on the right, Y1 on the front, Y2 on the back, Z1 on the top, and Z2 on the bottom. In the present embodiment, the left-right direction is the first direction in the present invention, the up-down direction is the second direction in the present invention, and the front-rear direction is the third direction in the present invention.

  First, the structure of the vibration generator according to the embodiment of the present invention will be described with reference to FIGS. A vibration generator 1 according to an embodiment of the present invention is a vibration generator mounted on an electronic device such as a portable information terminal or a game machine. The vibration generated by the vibration generating device 1 is used for, for example, vibration for notifying an incoming call at a portable information terminal, vibration for tactile feedback in a game machine, or the like. As shown in FIGS. 1 and 2, the vibration generator 1 includes a housing 10, a vibrating body 20, a holding unit 30, two elastic support units 40, and a magnetic drive unit 50.

  As shown in FIGS. 1 and 2, the housing 10 is configured by combining a main body 11 and a lid 12. The main body part 11 is a substantially rectangular parallelepiped box-shaped member formed by processing a metal plate, and has a housing part 11 a that is a concave part of a substantially rectangular parallelepiped that is recessed downward from the upper end part of the main body part 11. The lid portion 12 is a substantially rectangular plate-like member made by processing a metal plate, and is attached to the upper end portion of the main body portion 11 to cover the accommodating portion 11a from above.

  As shown in FIG. 3, the vibrating body 20 is a substantially rectangular parallelepiped member housed in the housing portion 11 a of the housing 10. The vibrating body 20 is provided with an electromagnet 60 that is a part of the magnetic drive unit 50.

  The holding part 30 and the elastic support part 40 are integrally formed by processing a metal plate having a spring property into a predetermined shape. As shown in FIGS. 4 and 5, the holding portion 30 is a substantially rectangular parallelepiped box-shaped portion. As shown in FIGS. 1 and 2, the lower portion of the vibrating body 20 is accommodated and held in the holding unit 30.

  As shown in FIGS. 4 and 5, the elastic support portion 40 is a leaf spring formed by bending a metal plate extending in the left-right direction a plurality of times so that the crease is along the front-rear direction. One of the two elastic support portions 40 extends from the left end portion of the holding portion 30 to the left side, and the other extends from the right end portion of the holding portion 30 to the right side. Hereinafter, the elastic support portion 40 extending from the left end portion of the holding portion 30 to the left side is abbreviated as the left elastic support portion 40, and the elastic support portion 40 extending from the right end portion of the holding portion 30 to the right side is referred to as the right support portion 40. This is abbreviated as the elastic support portion 40.

  Moreover, the elastic support part 40 has the three bending parts 41, the two flat parts 42, and the attachment part 43, as shown in FIG.4 and FIG.5. The bent portion 41 is a portion that is bent along the crease. The flat portion 42 is a substantially rectangular portion that extends from one of the three bent portions 41 toward the other, and includes a side along the direction of the fold line, a side along the extending direction, and have. The elastic support part 40 has a dimension along the fold direction of the flat part 42 (hereinafter, abbreviated as a width dimension of the flat part 42) and a dimension along the extending direction of the flat part 42 (hereinafter, flat part 42). The length dimension is abbreviated as (the abbreviated length dimension). Further, a substantially rectangular opening 42 a is formed at a position avoiding the outer peripheral portion of the flat portion 42.

  Note that a leaf spring having a folding structure such as the elastic support portion 40 has a feature that it is easily elastically deformed in a direction (left-right direction and up-down direction) perpendicular to the fold. That is, such a leaf spring can be elastically deformed along the left-right direction by expansion and contraction, and can be elastically deformed along the vertical direction by bending. On the other hand, such a leaf spring has a feature that it is difficult to be deformed in the direction along the crease (front-rear direction), and thus is suitable as a member for suppressing movement along the front-rear direction.

  Further, in a leaf spring having such a bent structure, the elastic deformation along the left-right direction due to expansion and contraction is usually easier to deform than the elastic deformation along the up-down direction due to bending. Therefore, if the elastic coefficient of the elastic support part 40 in the left-right direction is the first elastic coefficient and the elastic coefficient of the elastic support part 40 in the vertical direction is the second elastic coefficient, the first elastic coefficient and the second elastic coefficient Is a different value.

  The attachment portion 43 is formed at the distal end portion of the elastic support portion 40. At a predetermined position of the attachment portion 43, an engaging claw portion 43a is formed. Then, the elastic support portion 40 is attached to the housing 10 by the engaging claw portion 43 a engaging with the main body portion 11 of the housing 10. And the elastic support part 40 comes to support the vibrating body 20 so that it can vibrate along the left-right direction and an up-down direction by elastically deforming along the left-right direction and an up-down direction.

  The vibrating body 20 is supported by the elastic support portion 40, vibrates along the left-right direction at a first natural frequency determined in accordance with the first elastic coefficient and the mass of the vibrating body 20, and the second It vibrates along the vertical direction at a second natural frequency determined in accordance with the elastic coefficient and the mass of the vibrating body 20. Since the first elastic coefficient and the second elastic coefficient are different values, the first natural frequency and the second natural frequency are also different values.

  As shown in FIG. 2, the magnetic drive unit 50 includes an electromagnet 60 (first magnetic field generating means) disposed on the vibrating body 20 side and two permanent magnets 70 (first magnets) disposed on the housing 10 side. 2 magnetic field generating means). As shown in FIG. 3, the electromagnet 60 includes a magnetic core 61, a bobbin 62, a coil 63, and a terminal 64. The magnetic core 61 is a prismatic member made of a ferromagnetic material and extends along the front-rear direction. The bobbin 62 is a cylindrical member made of an insulator and covers the outer periphery of the magnetic core 61. The coil 63 is formed by winding a wire around the outer periphery of the bobbin 62. The terminal 64 connects both ends of the coil 63 and an external circuit (not shown) via a wiring member (not shown).

  The electromagnet 60 generates a magnetic field along the front-rear direction by flowing an alternating current through the coil 63, and magnetizes the front end portion and the rear end portion of the magnetic core 61 to different magnetic poles. The magnetic field generated by the electromagnet 60 by changing the current flowing through the coil 63 to an alternating current becomes an alternating magnetic field in which the direction of the magnetic field changes corresponding to the change in the direction of the current. When the front end portion of the magnetic core 61 is an S pole, the rear end portion is an N pole, and when the front end portion of the magnetic core 61 is an N pole, the rear end portion is an S pole. The timing at which the electromagnet 60 generates an alternating magnetic field and the frequency of the alternating magnetic field are controlled by the external circuit described above.

  As shown in FIGS. 2 and 6, the permanent magnet 70 is a substantially rectangular parallelepiped plate-like magnet. The two permanent magnets 70 are positioned on an extension line in the front-rear direction of the magnetic core 61 of the electromagnet 60 of the vibration body 20 (hereinafter, abbreviated as an extension line of the vibration body 20 in the front-rear direction). And the rear end side. Further, as shown in FIG. 6, the permanent magnet 70 is formed with a substantially rectangular magnetized surface 71 having sides along the left-right direction and the up-down direction. The magnetized surface 71 of the permanent magnet 70 and the magnetic core 61 of the electromagnet 60 are opposed to each other in the front-rear direction.

  In addition, the permanent magnet 70 is formed with a slit 72 extending obliquely from the upper left to the lower right of the magnetized surface 71. The magnetized surface 71 is divided into two magnetized regions 73 by the slit 72, and the two magnetized regions 73 are magnetized so as to have different magnetic poles. In this way, the permanent magnet 70 is magnetized so that different magnetic poles are arranged along the left-right direction and the up-down direction.

Hereinafter, the permanent magnet 70 disposed on the front end portion side of the housing 10 is abbreviated as the front permanent magnet 70, and the permanent magnet 70 disposed on the rear end portion side of the housing 10 is replaced with the rear permanent magnet 70. Abbreviated as magnet 70. Of the two magnetization regions 73, the lower left region is referred to as a first magnetization region 73a, and the upper right region is referred to as a second magnetization region 73b. The front permanent magnet 70 is magnetized so that the first magnetization region 73a is an S pole and the second magnetization region 73b is an N pole. In the rear permanent magnet 70, the first magnetization region 73a is N The description will be made assuming that the second magnetization region 73b is magnetized so as to be the S pole.

  Further, a yoke 74, which is a member made of a ferromagnetic material, is attached to the permanent magnet 70 so as to direct the magnetic field generated by the permanent magnet 70 toward the electromagnet 60 side. The vibration generator 1 has such a configuration.

  Next, operation | movement of the vibration generator 1 is demonstrated using FIG.7 and FIG.8. As described above, the magnetic drive unit 50 includes the electromagnet 60 disposed on the vibrating body 20 side and the two permanent magnets 70 disposed on the housing 10 side. The electromagnet 60 generates an alternating magnetic field by flowing an alternating current through the coil 63 and magnetizes the front end portion and the rear end portion of the magnetic core 61. The permanent magnet 70 is disposed on the housing 10 side so as to face the electromagnet 60 in the front-rear direction. The magnetized surface 71 of the permanent magnet 70 is formed with a first magnetized region 73a and a second magnetized region 73b that are magnetized so as to have different magnetic poles.

  Then, as shown in FIG. 7A, when the front end portion of the magnetic core 61 is magnetized to the N pole, the front end portion of the magnetic core 61 attracts the first magnetization region 73a of the front permanent magnet 70, and Repel each other with the two magnetization regions 73b. Although not shown, when the front end portion of the magnetic core 61 is magnetized to the N pole, the rear end portion of the magnetic core 61 is magnetized to the S pole, and the rear end portion of the magnetic core 61 is the first magnetization region of the rear permanent magnet 70. It attracts | sucks to 73a and repels with the 2nd magnetization area | region 73b. As a result, a magnetic force acts on the vibrating body 20 in the left direction and the downward direction.

  Further, as shown in FIG. 7B, when the front end portion of the magnetic core 61 is magnetized to the south pole, the front end portion of the magnetic core 61 repels the first magnetization region 73a of the front permanent magnet 70, and The two magnetized regions 73b are attracted to each other. Although not shown, when the front end portion of the magnetic core 61 is magnetized to the S pole, the rear end portion of the magnetic core 61 is magnetized to the N pole, and the rear end portion of the magnetic core 61 is the first magnetization region of the rear permanent magnet 70. Repels 73a and attracts the second magnetized region 73b. As a result, a magnetic force acts on the vibrating body 20 in the right direction and the upward direction.

  In the magnetic drive unit 50, the front end portion and the rear end portion of the magnetic core 61 of the electromagnet 60 are attracted to the first magnetization region 73 a of the permanent magnet 70 every time the direction of the magnetic field generated by the electromagnet 60 is reversed. They repel each other and repel each other, and repel each other and attract each other. And the magnetic drive part 50 drives the vibrating body 20 to the left-right direction and the up-down direction using the magnetic force between such an electromagnet 60 and the permanent magnet 70. FIG.

  On the other hand, as described above, the vibrating body 20 is supported by the elastic support portion 40 so as to be able to vibrate along the left-right direction and the up-down direction. The vibrating body 20 vibrates along the left-right direction at a first natural frequency determined corresponding to the first elastic coefficient and the mass of the vibrating body 20, and the second elastic coefficient and the mass of the vibrating body 20 are increased. It vibrates along the vertical direction at a second natural frequency determined correspondingly.

  Therefore, as shown in FIG. 8A, when the electromagnet 60 generates an alternating magnetic field having the same frequency as the first natural frequency, the vibrating body 20 is likely to vibrate in the left-right direction, and the vertical direction Against vibration. As a result, the vibrating body 20 comes to vibrate along the left-right direction. Also, as shown in FIG. 8B, when the electromagnet 60 generates an alternating magnetic field having the same frequency as the second natural frequency, the vibrating body 20 is likely to vibrate in the vertical direction, and the horizontal direction Against vibration. As a result, the vibrating body 20 comes to vibrate along the vertical direction.

  The magnetic drive unit 50 utilizes the relationship between the frequency of the alternating magnetic field and the ease with which the vibrating body 20 vibrates, and moves the vibrating body 20 along the left-right direction with an alternating magnetic field having the same frequency as the first natural frequency. The vibrating body 20 is vibrated along the vertical direction by an alternating magnetic field having the same frequency as the second natural frequency. Hereinafter, vibrating the vibrating body 20 along the left-right direction with an alternating magnetic field having the same frequency as the first natural frequency is abbreviated as driving the vibrating body 20 in the left-right direction at the first natural frequency. The vibration body 20 is vibrated in the vertical direction by an alternating magnetic field having the same frequency as that of the natural frequency, and is abbreviated as driving the vibration body 20 in the vertical direction at the second natural frequency.

  Next, a method for stabilizing the vibration operation of the vibrating body 20 will be described. As described above, a leaf spring having a folding structure such as the elastic support portion 40 has a characteristic that it is easily elastically deformed in a direction perpendicular to the fold, but is hardly deformed in a direction along the fold. Therefore, in this embodiment, the deformation | transformation along the front-back direction of the elastic support part 40 is suppressed using the characteristic of the leaf | plate spring of such a bending structure. And thereby, the vibration body 20 suppresses the movement along the front-rear direction, and the vibration operation along the left-right direction and the up-down direction of the vibration body 20 is stabilized.

  Moreover, in the leaf spring having such a folding structure, the flat part 42 is less likely to be deformed in the direction along the crease as the width dimension of the flat part 42 is larger than the length dimension of the flat part 42. In the present embodiment, the elastic support portion 40 is formed so that the width dimension of the flat portion 42 is larger than the length dimension of the flat portion 42 by utilizing the feature of the leaf spring having such a bent structure. This makes it easy to suppress deformation along the front-rear direction of the elastic support portion 40.

  Further, in the leaf spring having such a folding structure, the outer peripheral portion of the flat portion 42 greatly affects the difficulty of deformation in the direction along the fold of the elastic support portion 40, but avoids the outer peripheral portion of the flat portion 42. The influence of the raised part (the part closer to the center part) is smaller than the influence of the outer peripheral part of the flat part 42. On the other hand, by forming the opening 42a in a portion avoiding the outer peripheral portion of the flat portion 42, the mechanical strength in the direction (left and right direction and vertical direction) perpendicular to the fold of the flat portion 42 is reduced, and the elastic support portion 40 is provided. It can be easily elastically deformed in a direction perpendicular to the fold.

  In the present embodiment, utilizing the feature of the leaf spring having such a bent structure, the opening 42a is formed at a position avoiding the outer peripheral portion of the flat portion 42, whereby the elastic support portion 40 extends along the front-rear direction. Thus, it is easy to be elastically deformed along the left-right direction and the up-down direction while suppressing the deformation. And the ease of elastic deformation along the left-right direction and the up-down direction of the elastic support part 40 can be adjusted by adjusting the dimension of the opening part 42a.

  Next, the effect of this embodiment will be described. In the vibration generator 1 of the present embodiment, the elastic support portion 40 of the elastic support portion 40 has a fold line in the front-rear direction (third direction) perpendicular to the left-right direction (first direction) and the up-down direction (second direction). ) A plate formed with a plurality of bent portions 41 that are bent so as to extend along one of the plurality of bent portions 41, and two flat portions 42 that are substantially rectangular and extend from one of the plurality of bent portions 41 toward the other. It is a spring. A leaf spring having such a folding structure has a feature that it is easily deformed elastically in a direction perpendicular to the fold, but hardly deformed in a direction along the fold. Therefore, the elastic support part 40 can be easily elastically deformed along the left-right direction and the up-down direction, and deformation along the front-rear direction of the elastic support part 40 can be suppressed. As a result, even if a force along the front-rear direction is applied to the vibrating body 20 by the magnetic force between the electromagnet 60 (first magnetic field generating means) and the permanent magnet 70 (second magnetic field generating means), The movement along the front-rear direction can be suppressed, and the vibration operation along the left-right direction and the up-down direction of the vibrating body 20 can be stabilized.

  Further, in the vibration generator 1 of the present embodiment, the opening 42a is formed at a position avoiding the outer peripheral portion of the flat portion 42, thereby suppressing the elastic support portion 40 from being easily deformed along the front-rear direction. However, it can be easily elastically deformed along the horizontal direction and the vertical direction. And the ease of elastic deformation along the left-right direction and the up-down direction of the elastic support part 40 can be adjusted by adjusting the dimension of the opening part 42a. As a result, the vibrating body 20 can be easily vibrated along the left-right direction and the up-down direction while stabilizing the vibrating operation of the vibrating body 20, and the ease of vibration of the vibrating body 20 can be adjusted. .

  Further, in the vibration generator 1 of the present embodiment, the width dimension (dimension along the crease) of the flat part 42 is larger than the length dimension (dimension along the extending direction) of the flat part 42. Furthermore, by forming the elastic support portion 40, deformation along the front-rear direction of the elastic support portion 40 can be further suppressed, and the vibration operation of the vibrating body 20 can be further stabilized.

  Further, in the vibration generating device 1 of the present embodiment, the magnetic driving unit 50 drives the vibrating body 20 at the first natural frequency corresponding to the first elastic coefficient and the mass of the vibrating body 20, thereby causing the vibrating body. 20 can be easily vibrated along the left-right direction, and can be made difficult to vibrate along the up-down direction. In addition, the magnetic drive unit 50 drives the vibrating body 20 at the second natural frequency corresponding to the second elastic coefficient and the mass of the vibrating body 20, thereby easily vibrating the vibrating body 20 along the vertical direction. And it can be made hard to vibrate along the left-right direction. As a result, it is possible to realize a desired vibration operation along the horizontal direction and the vertical direction of the vibration body 20 while stabilizing the vibration operation of the vibration body 20.

  Further, in the vibration generating device 1 of the present embodiment, the alternating magnetic field generated by the electromagnet 60 attracts or repels the magnetic core 61 on the electromagnet 60 side with the first magnetization region 73a that is one magnetic pole on the permanent magnet 70 side. It is possible to repel or attract each other to the second magnetization region 73b which is the other magnetic pole on the permanent magnet 70 side. Then, by using the magnetic force between the electromagnet 60 and the permanent magnet 70, the vibrating body 20 can be easily vibrated along the left-right direction and the up-down direction. In addition, even when a magnetic force acts between the permanent magnet 70 and the electromagnet 60, the deformation along the front-rear direction of the elastic support portion 40 is suppressed, so that the vibration operation of the vibrating body 20 can be stabilized. Therefore, such a vibration generator 1 is suitable for driving the vibrating body 20 using the magnetic force between the electromagnet 60 and the permanent magnet 70.

  As mentioned above, although embodiment of this invention has been described, this invention is not limited to said embodiment, As long as it does not deviate from the meaning of this invention, it can change suitably.

  For example, in the embodiment of the present invention, the configuration of the vibration generator 1 may be appropriately changed as long as a predetermined function can be realized. For example, the two elastic support portions 40 may be directly attached to the vibrating body 20. In that case, the holding part 30 becomes unnecessary. Moreover, the vibration generator 1 may further include members other than those described above.

  In the embodiment of the present invention, as long as a predetermined function can be realized, the material and shape of the housing 10, the holding unit 30, and the elastic support unit 40 may be appropriately changed. For example, the number of times the leaf spring that is the elastic support portion 40 is bent may be other than the number described above. Further, the shape of the flat portion 42 and the shape of the opening 42a may be shapes other than those described above. The elastic support portion 40 may be formed using a member different from the holding portion 30 and then combined with the holding portion 30.

  In the embodiment of the present invention, the configuration of the magnetic drive unit 50 may be appropriately changed as long as a predetermined function can be realized. For example, the permanent magnet 70 may be disposed on either the front end side or the rear end side of the housing 10. In addition, as long as different magnetic poles are arranged in the left-right direction and the up-down direction, the shape of the slit 72 may be a shape other than that described above. Further, a plurality of permanent magnets magnetized so as to have different magnetic poles along the left-right direction and the up-down direction may be arranged side by side in the housing 10.

  In the embodiment of the present invention, if a predetermined function can be realized, the magnetic drive unit 50 drives the vibrating body 20 at a frequency other than the first natural frequency or the second natural frequency. It doesn't matter. For example, the magnetic drive unit 50 not only drives the vibrating body 20 along the left-right direction at the first natural frequency and drives the vibrating body 20 along the up-down direction at the second natural frequency. The vibrating body 20 may be driven along an oblique direction at an intermediate frequency between the first natural frequency and the second natural frequency.

DESCRIPTION OF SYMBOLS 1 Vibration generator 10 Housing | casing 11 Main body part 11a Accommodating part 12 Lid part 20 Vibrating body 30 Holding part 40 Elastic support part 41 Bending part 42 Flat part 42a Opening part 43 Attachment part 43a Engaging nail | claw part 50 Magnetic drive part 60 Electromagnet 61 Magnetic core 62 Bobbin 63 Coil 64 Terminal 70 Permanent magnet 71 Magnetized surface 72 Slit 73 Magnetized region 73a First magnetized region 73b Second magnetized region 74 Yoke

Claims (5)

A housing,
A vibrator housed in the housing;
An elastic support portion that supports the vibrating body so as to vibrate along a first direction and a second direction orthogonal to each other;
A magnetic drive unit that drives the vibrating body using magnetic force along the first direction and the second direction;
The magnetic drive unit is
First magnetic field generating means disposed on the vibrating body side;
Vibration generation comprising second magnetic field generating means disposed on the housing side so as to be located on an extension line of the vibrating body in a third direction orthogonal to the first direction and the second direction A device,
The elastic support portion is
A plurality of bent portions bent so that the fold line is along the third direction;
A vibration generator comprising a leaf spring formed with a flat portion extending from one of the plurality of bent portions toward the other one.   The vibration generator according to claim 1, wherein an opening is formed at a position avoiding the outer peripheral portion of the flat portion.   The said elastic support part is formed so that the dimension of the direction along the said crease | fold of the said flat part may become larger than the dimension along the extension direction of the said flat part. The vibration generator according to claim 2. The elastic support portion is
A first elastic modulus with respect to the first direction;
A second elastic modulus different from the first elastic modulus with respect to the second direction;
The magnetic drive unit is
Driving the vibrator along the first direction at a first natural frequency corresponding to the first elastic modulus and the mass of the vibrator;
4. The vibrator according to claim 1, wherein the vibrator is driven along the second direction at a second natural frequency corresponding to the second elastic coefficient and the mass of the vibrator. The vibration generator in any one. The first magnetic field generating means is an electromagnet disposed on the vibrating body side so as to generate an alternating magnetic field along the third direction;
The second magnetic field generating means is a permanent magnet disposed on the housing side so as to face the electromagnet along the third direction,
The said permanent magnet is magnetized so that a different magnetic pole may be located in a line along the said 1st direction and the said 2nd direction, The Claim 1 thru | or 4 characterized by the above-mentioned. Vibration generator.

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