JP2017209656A - Vibration generator and vibration generation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technology that can easily increase contact force sense with a simple and compact configuration.SOLUTION: A vibration generator 1 comprises a rotational driving device 3, a conversion component 4, an eccentric cam 5, and a vibrator 6. The rotational driving device 3 generates a torque serving as a base of equal speed rotary motion. The conversion component 4 receives the torque from the rotational driving device 3 and converts the torque into a torque serving as a base of unequal speed rotary motion. The eccentric cam 5 makes rotary motion with the torque converted by the conversion component 4. This rotary motion of the eccentric cam 5 is an unequal speed because it uses the torque converted by the conversion component 4. The vibrator 6 vibrates at an unequal speed in response to rotation of the eccentric cam 5.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a technique for generating vibration.

  In facilities such as stadiums where events and events are held in the station, people get crowded. This crowded state not only hinders walking for pedestrians but also induces problems such as injuries due to falls, and may become a problem for facility operators such as railway companies and stadiums.

  For these reasons, there are a wide variety of techniques for reducing such congestion. For example, in order to help a visually impaired person walk, a guidance block and a Braille block are laid. A visually handicapped person senses the convex part of the guide block or the Braille block by a touch transmitted to the cane or the sole of the foot, and determines the walking course based on information obtained from the shape of the convex part. However, the guide block and braille block may be blocked by the convexity (protrusion) for people with reduced mobility, strollers, wheelchairs, and people using a carry back. .

  From such a background, Patent Document 1 discloses a technique for guiding a visually handicapped person by vibration of a derivative that is coplanar with a road surface.

  Patent Document 2 discloses a specific device (mechanism or method) for presenting a haptic sense. For example, in the device disclosed in Patent Document 2, two eccentric rotors are arranged on the same axis in a cylindrical gripping part gripped by a person, and the phase relationship and rotational direction of these eccentric rotors Torque (force sensation) is presented to the gripped hand due to variations such as rotational speed. Patent Document 3 discloses a configuration in which two weights that move linearly are arranged in parallel, and a force sense based on movement or rotation in one direction is presented depending on how the weights are moved.

  Patent Document 4 relates to a press apparatus, and the cited document 4 shows a configuration in which a universal joint or an eccentric cam is used for a movable part. Patent Document 5 relates to a technique for solidifying the ground or the like using a roller, and Patent Document 5 discloses a configuration for vibrating the roller using an eccentric weight. Patent Document 6 discloses a configuration in which an annular disk attached to a camshaft is moved at an unequal speed.

JP 2016-030932 A JP 2005-190465 A JP 2010-102613 A JP 2000-210701 A JP-A-10-244223 JP-A-8-260923

  The configuration shown in Patent Documents 2 and 3 is a configuration in which a tactile force sense is given to a person by an impact generated by moving a weight. In these configurations, it is conceivable to increase the weight in order to increase the sense of tactile force given to a person. In the configuration disclosed in Patent Document 3, it is conceivable to variably control the speed and displacement direction of the weight.

  However, increasing the weight or adding a structure that variably controls the speed and displacement direction of the weight to the structure shown in Patent Document 3 causes problems that the apparatus becomes larger and the structure becomes complicated. To do.

  The present invention has been devised to solve the above problems. That is, a main object of the present invention is to provide a technique that can easily increase the sense of touch with a simple and compact configuration.

In order to achieve the above object, the vibration generator of the present invention has, as its uniform phase,
A rotational drive device that generates a rotational force that is the basis of a constant speed rotational motion;
A conversion component that receives the rotational force from the rotational drive device and converts the rotational force into a rotational force that is the basis of an inconstant rotational motion;
An eccentric cam that rotates at a non-uniform speed by the rotational force after conversion by the conversion component;
And a vibrating body that vibrates at non-uniform speed in accordance with the rotation of the eccentric cam.

In addition, the vibration generation method of the present invention has, as its uniform phase,
The rotational drive device generates a rotational force that is the basis for constant-speed rotational movement,
By means of a conversion component that converts the rotational force that is the basis of the uniform rotational motion into the rotational force that is the basis of the non-constant rotational motion, the rotational force by the rotational drive device is based on the non-constant rotational motion Is converted into rotational force
The eccentric cam is caused to rotate at an unequal speed by the rotational force after conversion,
The vibrating body is vibrated at unequal speed in accordance with the rotation of the eccentric cam.

  According to the present invention, it is easy to increase the sense of touch with a simple and compact configuration.

It is a block diagram which simplifies and represents the structure of the vibration generator of 1st Embodiment which concerns on this invention. It is sectional drawing which represents typically the structure of the vibration generator of 2nd Embodiment which concerns on this invention. FIG. 3 is a simplified plan view when the vibration generator shown in FIG. 2 is viewed from the upper side of FIG. 2. It is a figure explaining one of the functions of a universal joint. It is sectional drawing which represents typically the structure of the vibration generator of 3rd Embodiment which concerns on this invention. It is sectional drawing which represents typically the structure of the vibration generator of 4th Embodiment which concerns on this invention.

  Embodiments according to the present invention will be described below with reference to the drawings.

<First Embodiment>
FIG. 1 is a block diagram showing a simplified configuration of the vibration generator according to the first embodiment of the present invention. The vibration generator 1 according to the first embodiment includes a rotation drive device 3, a conversion component 4, an eccentric cam 5, and a vibrating body 6. The rotary drive device 3 has a configuration that generates a rotational force that is the basis of a constant-speed rotational motion. The conversion component 4 is provided with a configuration that receives a rotational force from the rotational drive device 3 and converts the rotational force into a rotational force that is a basis for an inconstant rotational motion.

  The eccentric cam 5 rotates by the rotational force after conversion by the conversion component 4. The rotational motion of the eccentric cam 5 is unequal because the rotational force after conversion by the conversion component 4 is used. The vibrating body 6 vibrates at unequal speed according to the rotation of the eccentric cam 5.

  The vibration generating device 1 according to the first embodiment has a configuration in which a tactile force sense is not given to a person by an impact caused by the movement of a weight, but a tactile force sense is given by an unequal velocity vibration by the vibrating body 6. With this configuration, it is possible to increase the haptic sensation by the vibrating body 6 by changing the state of unequal velocity vibration of the vibrating body 6 without increasing the vibrating body 6. In addition, since the state of the unequal speed vibration of the vibrating body 6 can be adjusted, for example, by changing the rotational speed of the rotary motion in the rotary drive device 3, it can be easily variably controlled. Therefore, the vibration generator 1 of 1st Embodiment can acquire the effect that it becomes easy to enlarge a tactile force sense with a simple and compact structure.

Second Embodiment
The second embodiment according to the present invention will be described below.

  FIG. 2 is a cross-sectional view schematically showing the configuration of the vibration generator of the second embodiment. FIG. 3 is a simplified plan view when the vibration generator shown in FIG. 2 is viewed from above in FIG. The vibration generator 20 of the second embodiment is roughly a motor 21 that is a rotary drive device, a universal joint (universal joint) 22, a gear 23, an electromagnetic clutch 24, an eccentric cam 25, and a vibrating body. A stage 26 and a base 31 are provided.

  That is, the motor 21 is fixed to the bottom plate 28 by the fixing member 29. The motor 21 is connected to an input shaft 22A provided in the universal joint 22, and rotates the input shaft 22A around the central axis. The rotation of the input shaft 22A by the motor 21 is a constant speed motion. Here, the input shaft 22 </ b> A is arranged in a state where the central axis is inclined with respect to the plate surface of the bottom plate 28.

  The output shaft 22B provided in the universal joint 22 is inserted through the central portion of the gear 23B constituting the gear 23 and can rotate integrally with the gear 23B. Further, a base 31 is disposed on the tip side of the output shaft 22B. The base 31 has a plate shape, and is arranged side by side on the bottom plate 28 so that the plate surface thereof is parallel to the plate surface of the bottom plate 28. The base 31 is supported on the bottom plate 28 by support columns 34. The distal end portion of the output shaft 22 </ b> B of the universal joint 22 is fitted to a bearing portion 32 provided on the base 31 and supported by the base 31. The bottom plate 28, the base 31 and the support column 34 are often made of a metal material (aluminum, stainless steel, iron, etc.), but are made of a resin material depending on the strength and durability required according to the application. Also good.

  In the second embodiment, the output shaft 22B of the universal joint 22 is arranged such that the central axis thereof is orthogonal to the plate surface of the bottom plate 28 (base 31). That is, the central axis of the input shaft 22A and the central axis of the output shaft 22B form an angle.

By the way, when the central axis of the input shaft 22A and the central axis of the output shaft 22B in the universal joint 22 intersect, due to the structure of the coupling (joint) portion of the universal joint 22, the input shaft 22A and the output shaft 22B The angular velocities ω1 and ω2 have a relationship represented by Expression (1).

  In Equation (1), ω1 represents the angular velocity of the input shaft 22A, and ω2 represents the angular velocity of the output shaft 22B. θ represents the rotation angle of the input shaft 22A. As shown in FIG. 4, α represents an intersection angle between the central axis of the input shaft 22A and the central axis of the output shaft 22B.

  That is, in the universal joint 22, the output shaft 22 </ b> B performs an inconstant rotational motion that repeats acceleration and deceleration with a period of ½ rotation in accordance with the constant rotational motion of the input shaft 22 </ b> A. In other words, the universal joint 22 has a function as a conversion component that converts the rotational force that is the basis of the uniform rotational motion into the rotational force that is the basis of the non-constant rotational motion.

  A gear 23A that forms a pair with the gear 23B is disposed in mesh with the gear 23B. In the second embodiment, since the universal joint 22 is connected to the gear 23B, the gears 23A and 23B are configured so that the gear ratio between the gear 23A and the gear 23B is 1: 2. An electromagnetic clutch 24 is provided at the center of the gear 23 </ b> A, and a rotary shaft 36 is inserted through the electromagnetic clutch 24. The electromagnetic clutch 24 has a function of controlling transmission of rotational force from the gear 23A to the rotary shaft 36.

  One end side of the rotating shaft 36 is fitted into a bearing portion 37 provided on the bottom plate 28 and supported by the bottom plate 28. The other end side of the rotation shaft 36 passes through a bearing portion 38 provided on the base 31 and protrudes upward from the base 31 in FIG.

  A disc-shaped eccentric cam 25 is disposed on the upper side of the base 31 in FIG. The distal end side of the rotation shaft 36 on the base 31 side is inserted into the rotation center portion of the eccentric cam 25. The rotation center portion P (see FIG. 3) of the eccentric cam 25 is set at a position shifted from the center portion of the eccentric cam 25. The eccentric cam 25 is formed with a protrusion 40 projecting therefrom. In the second embodiment, the two protrusions 40 are arranged so as to be arranged on the same straight line passing through the rotation center portion P of the eccentric cam 25.

  Further, a disk-shaped stage 26 is disposed on the upper side of the base 31 in FIG. The stage 26 is supported on the base 31 via bearings (bearing balls) 42. A circular fitting hole 41 is formed in the stage 26. The protrusion 40 of the eccentric cam 25 is fitted into the fitting hole 41.

  The stage 26 is provided with a long hole (slit) 43. In the second embodiment, there are a plurality (two) of the long holes 43 provided in the stage 26, and the longitudinal directions of these long holes 43 are aligned in the same direction. The base 31 is provided with a long hole 44 that extends in a direction orthogonal to the longitudinal direction of the long hole 43. The long holes 43 and 44 form a pair in a one-to-one correspondence, and the long holes 43 and 44 that form a pair are arranged in a manner that a part thereof overlaps. Further, a common stopper 45 is inserted through the long holes 43 and 44 forming a pair. The stopper 45 is supported by the stage 26 and the base 31 so as to be slidable in the long holes 43 and 44 using, for example, an E-ring (not shown). The long holes 43 and 44 and the stopper 45 constitute a displacement limiting mechanism that restricts the displacement range of the stage 26.

  The vibration generator 20 of the second embodiment is configured as described above. In the vibration generating device 20, the rotation of the motor 21 causes the input shaft 22A of the universal joint 22 to rotate at a constant speed, and the output shaft 22B performs a rotation motion at an inconstant speed according to the rotation of the input shaft 22A. To do. Further, the gears 23A and 23B of the gear 23 are driven according to the rotational movement of the output shaft 22B, the rotary shaft 36 rotates, and the eccentric cam 25 rotates about the rotation center portion P. Thereby, the protrusion 40 of the eccentric cam 25 is rotationally displaced so as to draw a circular orbit centering on the rotation center portion P of the eccentric cam 25 while pressing the inner peripheral surface of the fitting hole 41 of the stage 26. The stage 26 does not rotate because the range in which the stage 26 can be displaced is restricted by the long holes 43 and 44 and the stopper 45, but the stage itself does not rotate, but the displacement direction is the rotation center of the eccentric cam 25 by the pressing force from the projection 40. It is displaced so as to draw a circular orbit around the part P. The movement of the stage 26 is the same movement (that is, vibration) as the rapid return movement due to the unequal speed rotational movement of the eccentric cam 25, and gives a human tactile sensation as if oscillating in one direction. Can do. In the second embodiment, the vibration direction of the stage 26 can be controlled by controlling the phase of rotation of the rotary shaft 36 (eccentric cam 25) with respect to the rotational movement of the gear 23B of the gear 23 by the electromagnetic clutch 24. .

  Similar to the vibration generator of the first embodiment, the vibration generator 20 of the second embodiment can obtain an effect that it is easy to increase the sense of touch with a simple and compact configuration. . In particular, in the second embodiment, since the universal joint 22 is used as the conversion component, the configuration of the conversion component is simple, and the vibration generator 20 can be more easily downsized.

  Moreover, the vibration generator 20 of 2nd Embodiment is equipped with the structure by which the gear 23 is interposed in the path | route which transmits rotational force from the universal joint 22 to the eccentric cam 25. FIG. For this reason, the vibration generator 20 can control the speed of vibration by the stage 26 with a simple configuration.

  Furthermore, since the vibration generator 20 of the second embodiment has a configuration capable of controlling the vibration direction of the stage 26 by the electromagnetic clutch 24, variable control of the vibration direction can be easily realized. With this and the fact that it is possible to give a large tactile force sense, the vibration generator 20 can be applied to a guidance system that performs direction guidance using the tactile force sense.

  Furthermore, the vibration generator 20 of the second embodiment has a configuration that regulates the displacement range of the stage 26. For this reason, even if the stage 26 receives the force by the rotational motion of the eccentric cam 25, the stage 26 can perform the same motion as the quick return motion without rotating the stage itself.

  Furthermore, since the stage 26 moves along the base 31, the vibration generator 20 can be reduced in height.

<Third Embodiment>
The third embodiment according to the present invention will be described below. In the description of the third embodiment, the same reference numerals are given to the same operation parts as the constituent parts of the vibration generator of the second embodiment, and the duplicate description of the common parts will be omitted.

  FIG. 5 is a cross-sectional view showing a simplified configuration of the vibration generator of the third embodiment. The vibration generator 20 of the third embodiment is provided with a configuration (phase control configuration of the gear 23) for controlling the vibration direction of the stage (vibrating body) 26, instead of the electromagnetic clutch 24 in the second embodiment. . That is, in the vibration generator 20 of the third embodiment, the electromagnetic clutch 24 is omitted, and the vibration generator 20 of the third embodiment further includes a gear 48 and a motor in addition to the configuration of the second embodiment. 49 and a bracket 50. The gear 48 includes gears 48 </ b> A and 48 </ b> B, and the gear 48 </ b> A is inserted into the central portion of the gear 48 </ b> A and supported by the rotary shaft 36 via the bearing portion 52. The gear 48B is disposed so as to mesh with the gear 48A. A motor 49 is fixed to the bottom plate 28. The gear 48 </ b> B has a shaft of the motor 49 inserted through the center thereof, and rotates by receiving the rotational force of the motor 49.

  Instead of being fixed to the bottom plate 28, the motor 21 is fixed to the gear 48A. The bracket 50 is disposed between the gear 23 and the base 31, and the rotation shaft 36 is inserted through the center of the bracket 50 and supported by the rotation shaft 36 via a bearing portion 53. The bracket 50 rotates integrally with the rotary shaft 36. The bracket 50 and the gear 48 </ b> A are connected by a connecting member 55.

  Instead of being supported by the base 31, the distal end side of the output shaft 22 </ b> B of the universal joint 22 is supported and fixed to a bearing portion 54 formed on the bracket 50.

  The vibration generator 20 of the third embodiment is configured as described above. In the vibration generator 20 of the third embodiment, the gear 49B is rotated when the motor 49 is driven to rotate, and the gear 48A is also rotated accordingly. The rotational force generated by the rotational movement of the gear 48A is transmitted to the rotary shaft 36. The phase of the gear 23A in the gear 23 (that is, the vibration direction of the stage 26) is controlled by the force from the gear 48 to the rotating shaft 36.

  The vibration generator 20 of the third embodiment can obtain the same effects as the vibration generator 20 of the second embodiment. In addition, the vibration generator 20 of the third embodiment includes a configuration that controls the vibration direction of the stage 26 using a motor 49 and a gear 48 instead of the electromagnetic clutch 24. For this reason, although the vibration generator 20 of 3rd Embodiment will be a little large compared with the case where the electromagnetic clutch 24 is utilized, since a structure becomes simple, it becomes difficult to break down and maintenance is easy. The effect of becoming can be obtained.

<Fourth embodiment>
The fourth embodiment according to the present invention will be described below. Note that, in the description of the fourth embodiment, the same reference numerals are given to the same operation parts as the constituent parts of the vibration generators of the second and third embodiments, and duplicate descriptions of the common parts are omitted.

  FIG. 6 is a cross-sectional view illustrating a simplified configuration of the vibration generator of the fourth embodiment. The vibration generator 20 of the fourth embodiment controls the vibration direction of the stage (vibrating body) 26 with a configuration different from the configuration described in the third embodiment. Other configurations of the vibration generator 20 of the fourth embodiment are the same as those of the third embodiment.

  That is, the vibration generator 20 of the fourth embodiment also controls the vibration direction of the stage 26 using the gear 48 and the motor 49 as in the third embodiment. However, in the third embodiment, the motor 21 is mounted on the gear 48A of the gear 48, whereas in the fourth embodiment, the motor 21 is fixed to the bottom plate 28 as in the second embodiment.

  That is, in the fourth embodiment, the motor 21 is fixed to the bottom plate 28 and supported by the base 31 via the universal joint 22. The gear 23 includes gears 23C and 23D in addition to the gears 23A and 23B. The gear 23 </ b> D has a rotation shaft 36 inserted through the center thereof and is supported by the rotation shaft 36 via a bearing portion 57. The gear 23D is arranged to mesh with the gear 23B.

  The gear 23 </ b> C has a shaft 58 inserted through the center thereof and is connected to the gear 48 </ b> A of the gear 48 by the shaft 58. The gear 23C is disposed so as to mesh with the gear 23D and the gear 23A.

  In the example of FIG. 6, the motor 49 is fixed to the bottom plate 28 via a fixing member 59.

  The vibration generator 20 of the fourth embodiment can obtain the same effects as those of the second and third embodiments. Further, in the fourth embodiment, since the motor 21 is fixed, the wiring route for supplying power to the motor 21 is considered more than in the case where the motor 21 is displaced as in the third embodiment. In this way, the gear 48 can be designed.

<Other embodiments>
In addition, this invention is not limited to the 1st-4th embodiment, Various embodiment can be taken. For example, a bearing roller (cam follower) may be provided on the movable portion of the eccentric cam 25 in the vibration generator 20 of the second to fourth embodiments. In the second to fourth embodiments, the stage 26 has a circular shape, but may have a shape other than the circular shape. Furthermore, although the shape of the eccentric cam 25 is circular, other shapes other than circular may be used depending on the specification of the vibration mode in the vibration generator.

  Furthermore, in addition to the configuration of the vibration generator 20 of the second to fourth embodiments, a member that protects the stage 26, the eccentric cam 25, and the like may be provided depending on the application.

DESCRIPTION OF SYMBOLS 1,20 Vibration generator 3 Rotation drive device 4 Conversion parts 5,25 Eccentric cam 6 Vibrating body 21, 49 Motor 22 Universal joint 23, 48 Gear 24 Electromagnetic clutch 26 Stage

Claims (7)

A rotational drive device that generates a rotational force that is the basis of a constant speed rotational motion;
A conversion component that receives the rotational force from the rotational drive device and converts the rotational force into a rotational force that is the basis of an inconstant rotational motion;
An eccentric cam that rotates at a non-uniform speed by the rotational force after conversion by the conversion component;
A vibration generator comprising: a vibrating body that vibrates at non-uniform speed in accordance with the rotation of the eccentric cam.   The vibration generating device according to claim 1, wherein the conversion component is a universal joint.   The vibration generating device according to claim 1, wherein a gear is interposed in a path for transmitting a rotational force from the conversion component to the eccentric cam.   The vibration generating device according to claim 1, further comprising a mechanism for controlling a vibration direction by an inconstant motion of the vibrating body according to the rotation of the eccentric cam.   A gear is provided in a path for transmitting a rotational force from the conversion component to the eccentric cam, and a clutch mechanism for controlling a vibration direction due to an inconstant motion of the vibrating body according to the rotation of the eccentric cam. The vibration generator according to claim 1 or 2, further comprising:   The vibration generating device according to any one of claims 1 to 5, further comprising a displacement limiting mechanism that restricts the displacement of the eccentric cam. The rotational drive device generates a rotational force that is the basis for constant-speed rotational movement,
By means of a conversion component that converts the rotational force that is the basis of the uniform rotational motion into the rotational force that is the basis of the non-constant rotational motion, the rotational force by the rotational drive device is based on the non-constant rotational motion Is converted into rotational force
The eccentric cam is caused to rotate at an unequal speed by the rotational force after conversion,
A vibration generating method for vibrating a vibrating body at unequal speed in accordance with the rotation of the eccentric cam.

Images