JP2016114980A - Vibration generator system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration generator system which can suppress vibration caused by plunger lateral pressure generated in a solenoid mechanism, and vibrate an operation body with larger amplitude.SOLUTION: In a vibration generator system, a transmission member 25 is driven in an axial direction by a solenoid mechanism worked as an actuator 20. A first elastic member 31 is fixed to an upper end 26a of a plunger 26 of the transmission member 25, and an operation body 10 is pushed up by the first elastic member 31. Vibration such as lateral swing or rotation deflection of the plunger 26 can be suppressed by separating the plunger 26 from the operation body 10. Elastic coefficient of the first elastic member 31 is made to coincide with those of the second elastic member 35 and the third elastic member 32 so that the operation body 10 can be driven between a plus side and a minus side with a large amplitude.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vibration generator that applies an impact force for vibration to an operating body that is operated with a finger.

  Patent Document 1 describes an invention relating to a vibration generator that vibrates by applying an impact force or a vibration force to a touch pad.

  In this vibration generator, a touch pad is supported by a spring and supported so as to be movable along the Z axis. A linear coil actuator is fixed to the housing, and its movable part is directly connected to the touchpad. When the movable part is driven by the linear coil actuator, the moving force is transmitted to the touch panel, and the touch panel vibrates at a desired frequency.

Special table 2008-516348 gazette

  In the vibration generator described in Patent Document 1, the movable part of the actuator and the touch pad are fixed to each other. In this case, it is difficult to make the center of the thrust acting on the actuator from the movable part and the center of gravity of the touchpad completely coincide with each other. It is inevitable that a biasing force in the direction intersecting the axis acts. Since a gap of about several tens of μm is formed between the movable part and the unique part of the actuator in a direction perpendicular to the Z-axis direction, when the biasing force is applied, the movable part of the actuator and this Lateral vibrations and rotational vibrations are likely to occur on the connected touchpad. At this time, high-frequency vibration sounds and impact sounds are generated, which can be annoying if they are heard as noise by the operator.

  Further, when lateral vibration or rotational vibration occurs in the movable part of the actuator and the touch pad connected to the movable part, side pressure acts on the shaft support part of the movable part of the actuator, causing wear. Furthermore, in the case where a guide mechanism such as a thrust bearing that supports the touch pad so as to be movable in the Z-axis direction is formed, side pressure acts on this guide mechanism, and wear easily occurs.

  The present invention solves the above-described conventional problems, and when a transmission member that vibrates the operating body is driven by an actuator, a lateral force that causes lateral vibration or the like is less likely to act on the transmission member. An object of the present invention is to provide a vibration generator having a structure.

  It is another object of the present invention to provide a vibration generating device capable of causing a predetermined vibration to act on the operating body even when the transmission member is separated from the operating body and operated.

The present invention relates to a vibration generator provided with an operating body, an actuator, and a transmission member that transmits a force generated by the actuator to the operating body.
The operating body is supported movably in a first direction and a second direction which are opposite directions, and the actuator drives the transmission member in the first direction,
A first elastic member is fixed to at least one of the transmission member and the operating body, and when the transmission member is driven in the first direction by the actuator, the driving force is applied to the first elastic member. It is transmitted to the operating body through the above.

  The present invention is provided with a second elastic member that is compressed when the transmission member moves in the second direction.

  The vibration generator of the present invention is provided with a third elastic member that is compressed when the transmission member moves in the first direction.

  In the vibration generator of the present invention, the combined elastic coefficient of the first elastic member and the second elastic member and the combined elastic coefficient of the first elastic member and the third elastic member are approximately one. It is preferable to do it.

When the transmission member is moving in the second direction, the vibration generator according to the present invention is provided between the first elastic member and the operating body, or between the transmission member and the first elastic member. A gap is formed between
A gap is formed between the transmission member and the second elastic member when the transmission member is moving in the first direction.

  In the vibration generator of the present invention, it is preferable that the first elastic member and the second elastic member have a restitution coefficient of 0.3 to 0.8.

  In the present invention, the second elastic member may be a detection device that detects that the transmission member has moved in the second direction.

  In the present invention, since the transmission member driven by the actuator and the operation body are not coupled, the mass deviation of the operation body does not directly act on the transmission member, so that the transmission member and the operation body have lateral vibration and rotational vibration. Is less likely to occur and noise can be reduced. In addition, it is possible to prevent a large lateral pressure from acting on the bearing portion of the transmission member.

  The present invention provides the first elastic member, the second elastic member, and the third elastic member even if the transmission member and the operation body are separated, and the elastic coefficient and restitution coefficient of these elastic members are set. By optimizing, it becomes possible to give a large amplitude vibration to the operating member.

Sectional drawing of the vibration generator of embodiment of this invention, Sectional drawing which shows the state which the vibration generator shown in FIG. 1 operate | moved, Explanatory drawing which shows the equivalent model of the vibration generator shown in FIG. A diagram showing a vibration waveform of the vibration generator shown in FIG. A diagram showing a vibration waveform of the vibration generator shown in FIG. A diagram showing the relationship between suction force and lateral pressure in the actuator,

  In the vibration generator 1 shown in FIGS. 1 and 2, a bracket 4 is fixed on a substrate 3, and the substrate 3 and the bracket 4 constitute a base 2.

  A plurality of guide shafts 5 are fixed to the upper part of the bracket 4, and the operating body 10 is guided by the guide shafts 5 and supported so as to be movable back and forth in the Z direction (vertical direction). Since the operating body 10 is guided by the plurality of guide shafts 5, it can move up and down while maintaining a horizontal posture. A biasing spring 6 is provided between the bracket 4 and the operating body 10, and the operating body 10 is biased upward along the Z axis by the biasing spring 6.

  The operation body 10 is configured by fixing an operation base material 11 and an operation knob 12 installed thereon. The operation base 11 is made of metal or synthetic resin and is supported by a plurality of guide shafts 5 so as to be reciprocally movable in the Z direction. The operation knob 12 is made of a synthetic resin material, and a coordinate input device such as an electrostatic sensor is mounted on the front surface 12a or the back surface 12b, and the position of the operation knob 12 touched by the operator's finger 40. Can be detected.

  An actuator 20 is fixed to the lower surface of the ceiling plate 4 a of the bracket 4. The actuator 20 is a uniaxial drive actuator and is a solenoid mechanism. As a single axis actuator, a linear coil may be used in addition to the solenoid mechanism.

  The fixed portion of the actuator 20 which is a solenoid mechanism is composed of an inner yoke 21 and an outer yoke 22 made of a magnetic metal material, and an exciting coil 23 held inside the yokes 21 and 22. The movable part of the actuator 20 has a transmission member 25. The transmission member 25 includes a plunger 26 that moves forward and backward in the Z-axis direction through the inner yoke 21, a movable yoke 27 that is attracted to the inner yoke 21, and a biasing portion 28 that is fixed to the lower end of the movable yoke 27. The pressing portion 29 is formed at the lower end portion.

  The plunger 26 is a metal shaft. A thrust bearing 7 is fixed to the upper surface of the bracket 4, and the plunger 26 is slidably supported by the thrust bearing 7. The thrust bearing 7 is made of an impregnated bearing made of metal and containing lubricating oil.

  A first elastic member 31 is fixed to the upper end 26 a of the plunger 26 constituting the transmission member 25. The first elastic member 31 is made of synthetic rubber or synthetic foamed resin, and can be elastically deformed in the compression direction. FIG. 1 shows a state where the excitation coil 23 of the actuator 20 is not energized. At this time, the transmission member 25 is lowered, and a minute gap δ1 is formed between the first elastic member 31 and the operation base material 11. The first elastic member 31 may be fixed to the lower surface of the operation base material 11, and a gap δ1 may be formed between the first elastic member 31 and the upper tip 26a of the plunger 26.

  A third elastic member 32 is interposed between the outer yoke 22 and the urging portion 28 of the transmission member 25. Similar to the first elastic member 31, the third elastic member 32 is formed of a material that can be elastically deformed in the compression direction, such as synthetic rubber or synthetic foamed resin. As shown in FIG. 1, when the excitation coil 23 is not energized, the pressure f exerted by the second elastic member 32 urges the transmission member 25 downward so as not to move in the lowered state. ing. The third elastic member 32 may be fixed to the biasing portion 28 and the upper portion thereof may be in contact with the lower surface of the outer yoke 22 without being fixed.

  A second elastic member 35 is provided on the substrate 3 of the base 2. Similar to the first elastic member 31, the second elastic member 35 is formed of a material that can be elastically deformed in the compression direction, such as synthetic rubber or synthetic foamed resin. In this embodiment, the second elastic member 35 is a detection device, and is provided with contacts and electrodes facing each other. When the transmission member 25 moves further downward from the posture shown in FIG. 1, the second elastic member 35 is pushed by the pressing portion 29 of the transmission member 25, the internal contacts come into contact with each other, and a switching signal is generated. As the electrodes approach, the capacitance between the electrodes changes, and a change signal is generated by this change.

  In the present invention, the second elastic member 35 and the switch mechanism are configured separately, and when the transmission member 25 is pushed downward, the second elastic member 35 exerts an upward elastic force. At the same time, the switch mechanism may operate.

  As shown in FIG. 2, when the exciting coil 23 of the actuator 20 is energized, the inner yoke 21 is magnetized by the current magnetic field, the movable yoke 27 is attracted to the inner yoke 21, and the transmission member 25 is moved along the Z axis. To rise. At this time, a second gap δ2 is formed between the pressing portion 29 of the transmission member 25 and the second elastic member 35.

  FIG. 3 shows an equivalent model of each part of the vibration generator 1 shown in FIGS. The first elastic member 31 has an elastic coefficient k1 and a damping coefficient c1, the second elastic member 35 has an elastic coefficient k2 and a damping coefficient c2, and the third elastic member 32 has an elastic coefficient k3 and a damping coefficient. c3. In FIG. 3, a pressure applied downward from the third elastic member 32 to the transmission member 25 in a non-excitation state in which the excitation coil 23 is not energized is indicated by f.

  The finger 40 can also be represented as a model having an elastic coefficient kf and an attenuation coefficient cf.

Next, the operation of the vibration generator will be described.
As shown in FIG. 1, when the excitation coil 23 of the actuator 20 is not energized, the transmission member 25 is lowered and a downward pressure f is applied to the transmission member 25 from the third elastic member 32. At this time, a first gap δ1 is formed between the first elastic member 31 fixed to the upper tip 26a of the plunger 26 and the operation base material 11.

  When the finger 40 touches the surface 12 a of the operation knob 12, the contact of the finger 40 is detected by a coordinate detection device such as an electrostatic sensor mounted on the operation knob 12. When the finger 40 is moved along the surface 12a, the movement state of the contact position of the finger 40 is detected by the coordinate detection device. When the finger 40 is moved on the surface 12a of the operation knob 12, the cursor display moves on a display screen (not shown). After the cursor display is moved to one of the menu display positions, the menu selection determination operation can be performed by pressing the operation knob 12 with the downward force F1.

  When the downward pressing force F1 is applied to the operating body 10 with the finger 40 from the state of FIG. 1, the operating body 10 is guided and lowered by the guide shaft 5, but when the operating body 10 is lowered by a minute distance δ1, the operating base 10 is lowered. The material 11 comes into contact with the first elastic member 31, and the transmission member 25 is moved downward together with the operation body 10. Then, the second elastic member 35 is pushed by the pressing portion 29 of the transmission member 25, the contact point inside the second elastic member 35 comes into contact, or the switching signal is generated when the electrode approaches. When the switching signal is supplied to a control unit (not shown), a drive circuit (not shown) is started, and a drive current is supplied to the excitation coil 23 of the actuator 20. This drive current is in the form of a short-time pulse and is given only one shot.

  When the exciting coil 23 is energized, the movable yoke 27 is attracted to the inner yoke 21, the transmission member 25 is lifted, and the first elastic member 31 fixed to the upper tip 26 a of the plunger 26 is used to The operation base 10 is pushed upward, the first elastic member 31 contracts, and the third elastic member 32 contracts, so that the operating body 10 is bent. Immediately after that, when the energization to the exciting coil 23 is cut off and the attraction force of the solenoid mechanism is released, the elastic restoring force of the contracted first elastic member 31, the bending elastic force of the operating body 10, The transmission member 25 is moved downward by the elastic restoring force of the third elastic member 32, and the second elastic member 35 is contracted by the pressing portion 29 at the lower end of the transmission member 25.

  Thereafter, the transmission member 25 is raised by the elastic restoring force of the second elastic member 35, the first elastic member 31 hits the lower surface of the operation base material 11, and this operation is repeated. If the excitation coil 23 is energized for one shot, the operating body 10 generates a damped vibration as shown in FIGS. By transmitting this damped vibration to the finger 40, the operator is informed that the switching signal has been generated.

Next, the effect of the vibration generator 1 shown in FIGS. 1 to 3 will be described.
In the vibration generator 1, the plunger 26 constituting the transmission member 25 and the operation body 10 are separated. Since the plunger 26 can move back and forth in a free state, it is difficult for the plunger 26 to be laterally shaken, tilted, or rotated due to the bias of the center of gravity as when the plunger 26 and the operating body 10 are connected.

  FIG. 6 shows the characteristics of the solenoid mechanism. The horizontal axis shows the gap between the plunger and its bearing, that is, the gap between the plunger and the bearing in the direction perpendicular to the plunger's axis, and the vertical axis shows the axial suction force against the plunger and acts on the plunger. Indicates the lateral pressure to be applied. As shown in FIG. 6, in the solenoid mechanism, the side pressure cannot be reduced unless the gap is made very small, and the side pressure is normally about 10% of the suction force. Therefore, when the plunger 26 and the operating body 10 are connected, the side pressure tends to cause a shake in the total mass of the plunger 26 and the operating body 10, and a vibration noise is likely to be generated, with a relatively high frequency. Noise will be generated. However, in the vibration generator 1 of the above embodiment, since the plunger 26 and the operating body 1 are separated, a lateral vibration force does not act on the operating body 10 due to the lateral pressure, and the noise is reduced. It becomes easy to reduce.

  Further, even if the plunger 26 and the operation body 10 are separated, the first elastic member 31, the second elastic member 35, and the third elastic member 32 are provided in FIGS. As shown, it is possible to give vibration to the operating body 10 such that the acceleration (amplitude) is approximately the same in the plus direction and the minus direction. This is because when the excitation coil 23 is energized and the transmission member 25 is attracted upward, and then the energization is cut off, the transmission member 25 is caused by the elastic restoring force of the first elastic member 31 and the third elastic member 32. This is because a downward force is applied to the second elastic member 35, and thereafter, an operation in which the transmission member 25 is pushed upward by the elastic force of the second elastic member 35 can be realized.

  In order to perform such an operation, the coefficient of restitution of the first elastic member 31 and the second elastic member 35 is preferably 0.3 to 0.8, and the coefficient of restitution of the third elastic member 32 is Is preferably 0.3 to 0.8.

  Further, it is preferable that the combined elastic coefficient of the first elastic member 31 and the second elastic member 35 and the combined elastic coefficient of the first elastic member 31 and the third elastic member 32 substantially coincide with each other. . Here, the term “match” means that the difference in mutual synthetic elastic modulus is within 10% of any synthetic elastic modulus. By setting the composite elastic modulus as described above, the plus-side acceleration (amplitude) and minus-side acceleration (amplitude) of the operating body 10 can be set to the same degree as shown in FIGS. It becomes possible. In addition, it is preferable that the elastic coefficients of the first elastic member 31, the second elastic member 35, and the third elastic member 32 also coincide with each other.

  4 and 5 show the acceleration of the operating tool 10 when the horizontal axis indicates time and the vertical axis indicates one shot of excitation current. This diagram is the result of simulation based on the transmission model shown in FIG.

  FIG. 4 shows (i) the acceleration change when the natural frequency is set to 75 Hz, and the acceleration change when it is set to 65 Hz, depending on the mass of the transmission member 25 and the operating body 10 and the elastic coefficient of each elastic member. Is indicated by (ii). The elastic coefficients of the first elastic member 31, the second elastic member 35, and the third elastic member 32 were made to coincide with each other, and the restitution coefficient of each elastic member was set to 0.8. From FIG. 4, no matter how the natural frequency is set, by providing the first elastic member 31, the second elastic member 35, and the third elastic member 32, the operating body 10 is moved in the plus direction and the minus direction. It can be seen that driving with the same amplitude is possible.

  In FIG. 5, the elastic coefficients of the first elastic member 31, the second elastic member 35, and the third elastic member 32 are made to coincide with each other, and the restitution coefficient of each elastic member is set to 0.6. In this state, the change in the acceleration of the operating body 10 when the gap between the plunger 26 and the thrust bearing 7 is 10 μm, which is the minimum value that can be assumed, is indicated by (iii), and is the maximum value that can assume the gap. The change in acceleration when it is 90 μm is indicated by (iv).

  In FIG. 5, it can be understood that the driving force applied to the transmission member 25 by the solenoid mechanism is effectively transmitted to the operating body 10 regardless of the size of the gap between the plunger and the bearing portion.

DESCRIPTION OF SYMBOLS 1 Vibration generator 2 Base 3 Board | substrate 4 Bracket 5 Guide shaft 7 Thrust bearing 10 Operation body 20 Actuator 23 Excitation coil 25 Transmission member 26 Plunger 31 2nd elastic member 32 3rd elastic member 35 2nd elastic member 40 Finger

Claims (7)

In a vibration generator provided with an operating body, an actuator, and a transmission member that transmits a force generated by the actuator to the operating body,
The operating body is supported movably in a first direction and a second direction which are opposite directions, and the actuator drives the transmission member in the first direction,
A first elastic member is fixed to at least one of the transmission member and the operating body, and when the transmission member is driven in the first direction by the actuator, the driving force is applied to the first elastic member. The vibration generating device is transmitted to the operating body via the vibration generator.   The vibration generator according to claim 1, further comprising a second elastic member that is compressed when the transmission member moves in the second direction.   The vibration generator according to claim 2, further comprising a third elastic member that is compressed when the transmission member moves in the first direction.   The synthetic elastic modulus of the first elastic member and the second elastic member and the synthetic elastic modulus of the first elastic member and the third elastic member substantially coincide with each other. Vibration generator. When the transmission member is moving in the second direction, a gap is formed between the first elastic member and the operating body, or between the transmission member and the first elastic member,
5. The vibration generating device according to claim 2, wherein a gap is formed between the transmission member and the second elastic member when the transmission member is moving in the first direction.   The vibration generating device according to claim 2, wherein the first elastic member and the second elastic member have a coefficient of restitution of 0.3 to 0.8.   The vibration generating device according to claim 2, wherein the second elastic member is a detection device that detects that the transmission member has moved in the second direction.