JP2019025390A - Vibration generation device - Google Patents

Abstract

To reduce possibility that a permanent magnet and a magnetic core with a coil wound around are stuck by magnetic force while enhancing drive force.SOLUTION: A vibration generation device includes a housing, a vibrator which is housed in the housing and has a permanent magnet, an elastic support part which supports the vibrator so as to vibrate along a first direction and a second direction intersecting each other, a magnetic core which is arranged so as to face to the permanent magnet in the first direction and a third direction orthogonal to the second direction, and a coil wound around the magnetic core. The elastic support part is a plate spring having a bent part bent along the third direction wherein the third direction is a longitudinal direction.SELECTED DRAWING: Figure 2

Description

  The present disclosure relates to a vibration generator.

  2. Description of the Related Art A vibration generator that includes an elastic support portion (elastic connector) that supports a vibrating body so as to vibrate along two directions intersecting each other and is capable of vibrating in two directions and having different resonance frequencies in each direction is known. .

JP 2017-74584

  However, in the conventional technology as described above, since the air-core coil is used, the driving force is insufficient, and it is difficult to increase the strength of vibration transmitted (perceived) to the user. On the other hand, if a magnetic core is inserted into the coil, the driving force increases, but since the degree of freedom of deformation of the elastic support portion is high to enable operation in a plurality of directions, the permanent magnet and the magnetic core may stick to each other with a magnetic force. In particular, in the prior art as described above, the elastic support portion has a small dimension in the direction perpendicular to the vibration surface and is easily displaced in the direction perpendicular to the vibration surface. The possibility of the magnetic cores sticking together with magnetic force increases.

  Therefore, in one aspect, an object of the present invention is to reduce the possibility that a permanent magnet and a magnetic core around which a coil is wound are attached by a magnetic force while increasing a driving force.

In one aspect, a housing and
A vibrator housed in the housing and provided with a permanent magnet;
An elastic support portion that supports the vibrating body so as to vibrate along a first direction and a second direction intersecting each other;
A vibration generator having a magnetic core provided to face the permanent magnet in a third direction orthogonal to the first direction and the second direction, and a coil wound around the magnetic core,
A vibration generator is provided in which the elastic support portion is a leaf spring having a bending portion bent along the third direction with the third direction as a longitudinal direction.

  In one aspect, according to the present invention, it is possible to reduce the possibility that the permanent magnet and the magnetic core around which the coil is wound adhere to each other with magnetic force while increasing the driving force.

It is a perspective view which shows the structure of the vibration generator 1 by one Example. 1 is an exploded perspective view of a vibration generator 1. FIG. 3 is a perspective view of a vibrating body 20 of the vibration generator 1. FIG. FIG. 4 is an explanatory diagram of a holding unit 30 and an elastic support unit 40 of the vibration generator 1. 4 is a side view of the holding unit 30 and the elastic support unit 40. FIG. 3 is a plan view of a permanent magnet 70 of the vibration generator 1. FIG. It is explanatory drawing which shows the drive direction of a magnetic drive part. It is explanatory drawing which shows the vibration direction of a vibrating body. 6 is an explanatory diagram showing variations of a weight portion of the vibrating body 20. FIG. FIG. 10 is an explanatory view showing another variation of the weight portion of the vibrating body 20. FIG. 10 is an explanatory view showing another variation of the weight portion of the vibrating body 20.

  Hereinafter, embodiments will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a perspective view showing a configuration of a vibration generator 1 according to an embodiment. FIG. 2 is an exploded perspective view of the vibration generator 1. FIG. 3 is a perspective view of the vibrating body 20 of the vibration generator 1. 4 and 5 are explanatory diagrams of the holding unit 30 and the elastic support unit 40 of the vibration generating device 1. 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 side view of the holding unit 30 and the elastic support unit 40. FIG. 6 is a plan view of the permanent magnet 70 of the vibration generating device 1.

  FIG. 7 is an explanatory diagram showing the drive direction of the magnetic drive unit. FIG. 7A shows the direction of the magnetic force exerted on the magnetic core 61 by the permanent magnet 70 when the magnetic core 61 is magnetized to the north pole, and FIG. 7B shows the time when the magnetic core 61 is magnetized to the south pole. The direction of the magnetic force which the permanent magnet 70 exerts on the magnetic core 61 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, 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 easily vibrates, that is, the vibration direction of the vibrating body 20, and the dotted line arrow indicates the direction in which the vibration of the vibrating body 20 is relatively small.

  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 an example of the “first direction”, the up-down direction is an example of the “second direction”, and the front-back direction is an example of the “third direction”.

  The vibration generator 1 is a vibration generator mounted on an electronic device such as a portable information terminal or a game machine. The vibration generator 1 may be mounted in an operating device such as a vehicle. 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 a permanent magnet 70 that is a part of the magnetic drive unit 50. Specifically, the vibrating body 20 includes a substantially rectangular parallelepiped weight portion 21 and a permanent magnet 70. The permanent magnets 70 are provided at the front and rear ends of the weight portion 21, respectively. The weight portion 21 is made of, for example, tungsten.

  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).

  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 degree of deformation is usually different between elastic deformation along the vertical direction due to bending and elastic deformation along the horizontal direction due to expansion and contraction. 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. A fixed portion 43 a is formed at a predetermined position of the attachment portion 43. And the elastic support part 40 is attached to the housing | casing 10 by fixing the to-be-fixed part 43a to the main-body part 11 of the housing | casing 10. FIG. 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 is provided for each of the front and rear ends of the vibrating body 20. The magnetic drive unit 50 includes two permanent magnets 70 disposed on the vibrating body 20 side and two electromagnets 60 disposed on the housing 10 side. The electromagnets 60 are respectively disposed on the front end side and the rear end side of the housing 10. As shown in FIG. 2, the electromagnet 60 includes a magnetic core (coil core) 61, insulating sheets 62 a and 62 b, and a coil 63. The magnetic core 61 is a prismatic member made of a ferromagnetic material and extends along the front-rear direction. The insulating sheet 62 a is an annular member made of an insulator, and is fitted on the outer periphery of the magnetic core 61. The insulating sheet 62 b is an annular member made of an insulator, and is provided between the coil 63 and the vibrating body 20. The coil 63 is electrically connected at both ends to terminals (not shown). The terminal connects both ends of the coil 63 and an external circuit (not shown) via a wiring member 80 (see FIGS. 1 and 2). The wiring member 80 is FPC (Flexible Printed Circuits), but may be a flat cable or the like.

  A drive signal is applied to the electromagnet 60 from the external circuit. The drive signal is, for example, a rectangular wave (pulse wave), and is applied with a predetermined duty ratio. The predetermined duty ratio is, for example, 50% or around 50%, but may be varied. The electromagnet 60 generates a magnetic field along the front-rear direction by causing a current related to the drive signal to flow through the coil 63, and magnetizes the front end portion and the rear end portion of the magnetic core 61 to different magnetic poles. When the drive signal is applied with a predetermined duty ratio that is significantly greater than 0% and significantly less than 100%, the magnetic field generated by the electromagnet 60 has a magnetic field orientation corresponding to the change in the current orientation. The alternating magnetic field changes. 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. In this way, the timing at which the electromagnet 60 generates the alternating magnetic field and the frequency of the alternating magnetic field are controlled via the drive signal from the external circuit described above.

  The permanent magnet 70 is a substantially rectangular parallelepiped plate-shaped magnet as shown in FIGS. 2, 3, and 6. The two permanent magnets 70 are positioned on the extension line in the front-rear direction of the magnetic core 61 of the electromagnet 60 (hereinafter, abbreviated as the extension line of the vibrating body 20 in the front-rear direction) and the front end side and the rear end of the weight part 21. It is each arrange | positioned at the part side. Further, as shown in FIG. 6, the permanent magnet 70 is formed with a substantially rectangular magnetization 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.

  As schematically shown in FIG. 6, the magnetized surface 71 is divided into two magnetized regions 73 by diagonally dividing lines 72 (descriptive lines) so that the two magnetized regions 73 have different magnetic poles. Is magnetized. That is, the permanent magnet 70 has different poles via a boundary line that is oblique when viewed in the front-rear direction. 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 side of the housing 10 is abbreviated as the front permanent magnet 70, and the permanent magnet 70 disposed on the rear end side of the weight portion 21 is referred to as the rear permanent magnet. 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. In this embodiment, as an example, the front permanent magnet 70 is magnetized so that the first magnetization region 73a becomes the S pole and the second magnetization region 73b becomes the N pole. In the following description, it is assumed that the first magnetization region 73a is an N pole and the second magnetization region 73b is an S pole.

  In the modification, the permanent magnet 70 may be attached with a yoke that is a member made of a ferromagnetic material for directing the magnetic field generated by the permanent magnet 70 toward the electromagnet 60. Further, by arranging two rod-shaped permanent magnets in the left-right direction and the up-down direction, a magnetized region equivalent to the two magnetized regions 73 partitioned by the diagonally divided lines 72 may be realized.

  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 two permanent magnets 70 disposed on the vibrating body 20 side and the two electromagnets 60 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.

  Here, as an example, the interaction between the rear permanent magnet 70 and the electromagnet 60 will be described with reference to FIG. FIG. 7 is a schematic view when viewing the Y2 side from the Y1 side. As shown in FIG. 7A, when the front end portion of the rear magnetic core 61 is magnetized to the N pole, the front end portion of the magnetic core 61 attracts the first magnetized region 73a of the rear permanent magnet 70. Repel each other with the second magnetization region 73b. Although not shown, when the rear end portion of the front magnetic core 61 is magnetized to the N pole, the rear end portion of the magnetic core 61 attracts the first magnetization region 73a of the front permanent magnet 70, and the second magnetization region 73b. Repel each other. As a result, a magnetic force acts on the vibrating body 20 in the right direction and the upward direction.

  Further, as shown in FIG. 7B, when the front end portion of the magnetic core 61 is magnetized to the S pole, the front end portion of the rear magnetic core 61 repels the first magnetization region 73a of the rear permanent magnet 70. And attracts each other with the second magnetization region 73b. Although not shown, when the rear end portion of the front magnetic core 61 is magnetized to the south pole, the rear end portion of the magnetic core 61 repels the first magnetization region 73a of the front permanent magnet 70, and the second magnetization region 73b. And suck each other. As a result, a magnetic force acts on the vibrating body 20 in the left direction and the downward direction.

  In the magnetic drive unit 50, the magnetic core 61 of the electromagnet 60 attracts or repels the first magnetization region 73 a of the permanent magnet 70 each time the direction of the magnetic field generated by the electromagnet 60 is reversed in this way. Repel each other or attract each other with the second magnetization region 73b. 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. The two electromagnets 60 are controlled so that the front end portion of the rear magnetic core 61 and the rear end portion of the front magnetic core 61 are inverted between the S pole and the N pole in synchronization with each other in phase.

  On the other hand, as described above, the vibrating body 20 is supported by the elastic support portion 40 so as to vibrate along the left and right directions and the up and 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. As a result, the vibrating body 20 vibrates greatly along the left-right direction. Further, 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. As a result, the vibrating body 20 vibrates greatly 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.

  Further, even when an alternating magnetic field is generated at a frequency that does not match 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, it vibrates more in the left-right direction than in the up-down direction, and when the frequency is close to the second natural frequency, it vibrates in the up-down direction more than in the left-right direction. Further, in the case of an alternating magnetic field by a pulse wave, harmonics of a given frequency also contribute to the vibration. Therefore, a frequency at which the harmonics match or become close to the first natural frequency, specifically, the first frequency If the frequency is 1 / N times the natural frequency (where N is an integer, for example 3, the same shall apply hereinafter), it vibrates greatly in the left-right direction, and a frequency 1 / M times the second natural frequency (however, If M is an integer, for example 3, the same applies to the following, it vibrates greatly in the vertical direction.

  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 along the front-rear direction of the elastic support portion 40 is suppressed by utilizing the feature of the leaf spring having such a bent 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.

  Further, in the leaf spring having such a folding structure, as the width dimension of the flat part 42 is larger than the length dimension of the flat part 42, it becomes difficult to deform in the direction along the crease. In this 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.

  As described above, in the vibration generator 1 of the present embodiment, the elastic support portion 40 has the 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 and the permanent magnet 70, the movement of the vibrating body 20 along the front-rear direction can be suppressed. It is possible to stabilize the vibration operation along the horizontal direction and the vertical direction.

  Further, in the vibration generator 1 of the present embodiment, the magnetic drive 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, so that the vibrating body 20 can be easily vibrated along the left-right 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. can do. 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.

  By the way, in the vibration generator 1 of a present Example, since the magnetic core 61 is put into the coil 63 as mentioned above, the vibrating body 20 can be driven with a high driving force compared with the case where an air-core coil is used. Thereby, since the acceleration given to the vibrating body 20 can be increased or the heavier vibrating body 20 can be driven, the inertial force at the time of vibration can be increased, so that the user can easily perceive. Vibration can be realized.

  On the other hand, in this embodiment, the elastic support portion 40 has a property that it is difficult to be deformed in the direction along the crease (front-rear direction), and the front-rear direction is the longitudinal direction. Accordingly, the elastic support portion 40 can have a characteristic that does not substantially deform in the front-rear direction. As a result, when a large force in the front-rear direction is applied to the vibrating body 20 due to an impact or the like from the outside, the elastic support part 40 is deformed in the front-rear direction, and the magnetic core 61 and the permanent magnet 70 stick together with a magnetic force. The possibility can be reduced. In order to increase the driving force, it is preferable to use a strong magnet as the permanent magnet 70. In this case, once the magnetic core 61 sticks to the permanent magnet 70, it is difficult to peel off, and the vibration body 20 vibrates in the left-right direction and the up-down direction. Will be hindered. That is, according to the present embodiment, by inserting the magnetic core 61 into the coil 63, the driving force can be increased, and the possibility of malfunction due to the permanent magnet 70 and the magnetic core 61 sticking together with magnetic force can be reduced.

  Next, some variations of the weight part configuration that can be used as the weight part 21 of the vibrating body 20 will be described.

  9 to 11 are side views schematically showing the electromagnet 60 together with the weight portions 21A to 21C.

  In the example shown in FIG. 9, the two permanent magnets 70 are provided on both sides of the weight portion 21A in the front-rear direction. In this case, the weight portion 21A may be formed of a relatively high density material such as tungsten. Thereby, the mass of the weight part 21B can be efficiently increased using a relatively inexpensive material (for example, tungsten).

  In the example shown in FIG. 10, the two permanent magnets 70 are provided on both sides of the weight portion 21B in the front-rear direction. The weight portion 21B includes a fixing member 210B and a weight member 212B. The fixing member 210B may be formed of a magnetic material such as iron. The weight member 212B may be formed of a relatively high density material such as tungsten. The weight member 212B is fixed to the fixing member 210B by caulking or the like. The weight member 212B has a higher density than the fixing member 210B, and plays a role of efficiently increasing the mass of the weight portion 21B. The range (volume) occupied by the weight member 212B is determined according to the necessary mass of the weight portion 21B. Since the fixing member 210B is made of a magnetic material, the permanent magnets 70 on both sides of the weight portion 21B are magnetically connected. In other words, the fixing member 210B functions as a back yoke and can stabilize the magnetic characteristics of the permanent magnets 70 on both sides of the weight portion 21B.

  In the example shown in FIG. 11, the two permanent magnets 70A and 70B extend in the front-rear direction and form a weight portion 21C. That is, the weight portion 21C is formed by two permanent magnets 70A and 70B. The two permanent magnets 70A and 70B have a substantially triangular cross-sectional shape when viewed in the front-rear direction so that the first magnetization region 73a and the second magnetization region 73b shown in FIG. 6 are formed. For example, the permanent magnet 70A forms the first magnetization region 73a on both sides in the front-rear direction, and the permanent magnet 70B forms the second magnetization region 73b on both sides in the front-rear direction. In this case, in the permanent magnet 70A, the front first magnetization region 73a is an S pole and the rear first magnetization region 73a is an N pole. In the permanent magnet 70B, the front second magnetization region 73a is magnetized. It may be magnetized so that 73b becomes the N pole and the second magnetized region 73b on the rear side becomes the S pole. In this case, the two electromagnets 60 are controlled such that the front end portion of the rear magnetic core 61 and the rear end portion of the front magnetic core 61 are inverted between the S pole and the N pole in synchronization with each other in reverse phase. . The two permanent magnets 70A and 70B may be joined to each other by an adhesive or the like. According to the example shown in FIG. 11, since the entire weight portion 21C functions as a permanent magnet, the magnetic characteristics can be stabilized.

  Although each embodiment has been described in detail above, it is not limited to a specific embodiment, and various modifications and changes can be made within the scope described in the claims. It is also possible to combine all or a plurality of the components of the above-described embodiments.

  For example, in the above-described embodiment, the electromagnets 60 are provided opposite to each other on both sides of the vibrating body 20 in the front-rear direction in order to efficiently increase the driving force, but the present invention is not limited thereto. The electromagnet 60 may be provided only on one side in the front-rear direction.

DESCRIPTION OF SYMBOLS 1 Vibration generator 10 Housing | casing 11 Main body part 11a Accommodating part 12 Lid part 20 Vibrating body 21 Weight part 21A Weight part 21B Weight part 21C Weight part 30 Holding part 40 Elastic support part 41 Part 42 Flat part 43 Part 43a Fixed part 50 Magnetic drive unit 60 Electromagnet 61 Magnetic core 62a Insulating sheet 62b Insulating sheet 63 Coil 70 Permanent magnet 70A Permanent magnet 70B Permanent magnet 71 Magnetized surface 72 Split line 73 Magnetized region 73a First magnetized region 73b Second magnetized region 80 Member 210B Fixed member 212B Weight Element

Claims (6)

A housing,
A vibrator housed in the housing and provided with a permanent magnet;
An elastic support portion that supports the vibrating body so as to vibrate along a first direction and a second direction intersecting each other;
A vibration generator having a magnetic core provided to face the permanent magnet in a third direction orthogonal to the first direction and the second direction, and a coil wound around the magnetic core,
The said elastic support part is a vibration generator which is a leaf | plate spring which makes the said 3rd direction a longitudinal direction and has a bending part bent along the said 3rd direction.   2. The vibration generation according to claim 1, wherein the permanent magnet has different poles through a boundary line that is oblique to both the first direction and the second direction when viewed in the third direction. apparatus.   The vibrating body is disposed between the permanent magnets on both sides of a third direction perpendicular to both the first direction and the second direction in the casing, and between the permanent magnets in the third direction. The vibration generator according to claim 1, comprising a weight portion.   The vibration generator according to claim 3, wherein the weight portion includes tungsten.   The vibration generating device according to claim 3, wherein the weight portion includes tungsten and a magnetic body that magnetically connects the permanent magnets.   The vibration generating device according to claim 1, wherein the magnetic core and the coil are provided on both sides of the vibrating body in the third direction.

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