JP2016051303A - Power transmission mechanism and input device equipped with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power transmission mechanism improving vibration stimulation operation feeling without impairing push operation feeling, and an input device equipped with the power transmission mechanism.SOLUTION: A power transmission mechanism 10 is equipped with a motor 11 which transmits power for applying tactile feedback force and can normally and reversely rotate; and a link mechanism 12 which is rotatably and slidably coupled with one end of a first link member 13 fixed to a rotary shaft 11a of the motor 11 at the other end, and one end of a second link member 14 rotatably supported at the other end. The link mechanism 12 is configured to have different distances between a driving force transmitting position P where the first link member 13 transmits the driving force of the motor 11 to the second link member 14, and a rotary center of the second link member 14, in a case of rotating from an initial stop position of the first link member 13 in one direction, and in a case of rotating in the opposite direction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a power transmission mechanism and an input device including the same, and more particularly to a power transmission mechanism that transmits power for applying a tactile feedback force and an input device including the power transmission mechanism.

  As an example of an information presenting apparatus that transmits information to an operator, for example, when a touch-operable touch panel accepts an operation input, the operation sense is presented to the operator by applying vibration to a finger that is touch-operated. An operation device including a tactile sensation presentation device has been proposed (see, for example, Patent Document 1).

  The tactile sense presentation device described in Patent Document 1 includes a rotating cam member that rotates by driving a motor that can rotate forward and backward, and the rotating cam member knocks up a link member that rotates in conjunction with the touch panel to move the touch panel. It is configured to create a vibration stimulus operation feeling by lifting.

JP 2014-89550 A

  The tactile sense presentation device described in Patent Document 1 has a structure in which vibration is applied to a touch panel by hitting a link member and lifting the touch panel, and there is a limit in enhancing the vibration stimulation operation feeling.

  An object of the present invention is to provide a power transmission mechanism and an input device including the power transmission mechanism that improve the vibration stimulation operation feeling without impairing the push operation feeling.

[1] The present invention relates to a motor capable of rotating forward and reverse, which transmits power for applying a tactile feedback force, and the other end and one end of a first link member, one end of which is fixed to the rotating shaft of the motor. A link mechanism in which the other end of the second link member supported is rotatably and slidably connected, and the link mechanism is unidirectional from the initial stop position of the first link member as a starting point. Between the driving force transmission position at which the first link member transmits the driving force of the motor to the second link member and the center of rotation of the second link member. The power transmission mechanism is characterized in that the distance is different.

[2] The driving force transmission position according to [1] described above is an asymmetric curved movement trajectory when rotating in one direction from the initial stop position of the first link member and when rotating in the other direction. It moves along.

[3] The distance from the rotation center of the first link member to the driving force transmission position and the distance from the rotation center of the second link member to the driving force transmission position according to [1] or [2]. The ratio is configured to increase in a direction rotating in one direction from the initial stop position of the first link member or in a direction rotating in the other direction.

[4] A slide groove or a crankshaft is provided at the other end of the first link member according to any one of [1] to [3], and at the other end of the second link member, A crankshaft or a slide groove is provided, and the slide groove is inclined upward at a required angle with respect to a straight line connecting the rotation center of the first link member and the rotation center of the second link member. It is characterized by that.

[5] The present invention further includes a power transmission mechanism according to any one of the above [1] to [4], an initial stop position, a push operation direction spaced from the initial stop position, and a separated position in the vibration feedback direction. And a connecting member that is connected to the power transmission mechanism so as to follow the power transmission mechanism and changes the motion of the power transmission mechanism into a linear motion of the operation unit. The input device has a tactile sense presentation function for presenting a tactile stimulus operation feeling to the operation unit via a power transmission mechanism and the connecting member.

[6] The connection member according to [5] is characterized in that one end is provided on the link facing surface side of the operation portion and the other end is rotatably connected to the second link member.

  According to the present invention, it is possible to sufficiently improve the tactile stimulation operation feeling without impairing the push operation function.

It is a figure which shows typically an example of the input device provided with the typical power transmission mechanism which concerns on embodiment of this invention. It is a principal part enlarged view of a power transmission mechanism. It is a principal part enlarged view for demonstrating an example of operation | movement of the power transmission mechanism at the time of tactile feedback. It is a principal part enlarged view for demonstrating an example of operation | movement of the power transmission mechanism at the time of push operation. It is a graph which shows the relationship between the board surface displacement amount of an operation part, and the rotation angle of a motor in case the inclination angles of the slide groove which comprises the slip pair of the link mechanism in a power transmission mechanism differ. It is a figure (a) showing typically an input device provided with a power transmission mechanism concerning a comparative example, and a figure (b) showing another example of a power transmission mechanism concerning a comparative example typically.

  Preferred embodiments of the present invention will be specifically described below with reference to the accompanying drawings.

(Overall configuration of input device)
In FIG. 1, reference numeral 1 indicating the whole exemplifies an input device including a typical power transmission mechanism 10 according to this embodiment. The input device 1 according to the illustrated example is disposed in the periphery of a driver's seat such as a center console, for example, and is connected to a display via wiring.

  When the input device 1 touches the touch panel with an operator's finger, for example, a position on the surface of the touch panel is detected by a touch sensor, and a position detection signal corresponding to this position is an item button on the display. It is configured as a remote-operated input device that selects and determines.

  As shown in FIG. 1, the input device 1 includes a movable panel 2 that is a resin-made operation unit that can be pushed. The movable panel 2 is supported by a body (not shown) through an elastic support member so as to be capable of linear motion. On the body facing surface of the movable panel 2, a plurality of guide pieces 3,..., 3 for engaging and moving inside the body extend in the push operation direction.

  The movable panel 2 is provided with a touch panel (not shown) such as a capacitance type. The body on the back side of the touch panel is provided with an enter switch (not shown) for selecting and determining an item button on the display by pushing the operation panel surface 2a of the movable panel 2. As the enter switch, for example, an automatic return type micro switch is used.

(Overall configuration of power transmission mechanism)
Inside the body, a power transmission mechanism 10 having a tactile feedback function for presenting a tactile stimulus to the operator's finger by detecting that the operator's finger touches the operation panel surface 2a of the movable panel 2 is provided. Is incorporated.

  As shown in FIGS. 1 and 2, the power transmission mechanism 10 includes a motor 11 that is mounted on a control board (not shown) and that can rotate forward and reverse, and a link mechanism 12 that transmits forward and reverse rotation of the motor 11 to the movable panel 2. It has.

  As shown in FIGS. 1 and 2, the link mechanism 12 is a crank member 13 that is a first link fixed to the rotating shaft 11 a of the motor 11, and a second link that is connected to the crank member 13 so as to be able to follow. Arm member 14.

  As shown in FIGS. 1 and 2, the arm member 14 is formed in a plate shape longer than the crank member 13. One end of the arm member 14 is rotatably supported on the inner side wall of the body via a support shaft 14a. The other end of the arm member 14 is formed with a crankshaft fitting hole 14b that serves as a slide groove for transmitting the rotational motion of the crank member 13 to the arm member 14.

  As shown in FIGS. 1 and 2, a circular connecting pin 14 c is formed to project from a flat portion between the support shaft 14 a of the arm member 14 and the crankshaft fitting hole 14 b. On the back surface of the movable panel 2, a long plate-shaped connecting member 2b extending in the push operation direction is formed.

  A pin locking hole 2c that opens to the side is cut out at the tip of the connecting member 2b of the movable panel 2. A connecting pin 14c of the arm member 14 is rotatably connected to the pin locking hole 2c, and the rotation operation of the arm member 14 is transmitted to the movable panel 2.

(Operation of power transmission mechanism)
According to the power transmission mechanism 10 configured as described above, the reciprocating rotation of the motor 11 causes the crankshaft 13 a of the crank member 13 to reciprocate along the crankshaft fitting hole 14 b of the arm member 14. Since the arm member 14 is connected to the crank member 13 with the support shaft 14a as the rotation center so as to be able to follow, the crankshaft 13a reciprocates along the crankshaft fitting hole 14b.

  The reciprocating motion of the crankshaft 13a is transmitted to the connecting member 2b of the movable panel 2 via the connecting pin 14c of the arm member 14, and the movable panel 2 reciprocates. Therefore, a driving force for applying a tactile feedback force to the movable panel 2 is applied via the link mechanism 12 that transmits the forward / reverse rotation of the motor 11 to the movable panel 2.

  The power transmission mechanism 10 is configured to apply a tactile feedback force to the movable panel 2 by transmitting the rotation of the motor 11 to the movable panel 2 via the link mechanism 12. Due to its structure, when the movable panel 2 is pushed from the initial stop position, the resistance when the movable panel 2 is pushed increases due to the cogging torque of the motor 11 transmitted to the link mechanism 12. The operational feeling of the movable panel 2 will be impaired.

(Link mechanism configuration)
Therefore, the power transmission mechanism 10 according to this embodiment mainly includes a link mechanism 12 that achieves both an operation function and a tactile sense presentation function.

  As shown in FIG. 2, the crankshaft fitting hole 14 b of the arm member 14 is formed of a long hole that opens to the distal end side corresponding to the rotation locus of the crankshaft 13 a of the crank member 13.

  As shown in FIG. 2, the crankshaft fitting hole 14b has a straight line connecting the rotation center of the arm member 14 (center of the support shaft 14a) and the rotation center of the crank member 13 (center of the rotation shaft 11a). It is inclined upward with a required angle θ, and constitutes a sliding pair that is connected to the crankshaft 13a so as to be rotatable and slidable.

  When the motor 11 is rotated at an equal rotation angle in the forward direction shown in FIG. 3 or the reverse direction shown in FIG. 4 from the position based on the initial stop position shown in FIG. The distance between the driving force transmission position P at which the crankshaft 13a of the crank member 13 transmits the driving force of the motor 11 to the crankshaft fitting hole 14b of the arm member 14 and the rotation center of the arm member 14 in the reverse rotation direction. L is different.

When moving in the vibration feedback direction shown in FIG. 3, the distance L ₁ between the rotation center of the crank member 13 and the driving force transmission position P ₁ for transmitting the driving force of the motor 11 to the arm member 14, and the arm member 14 The rotation of the motor 11 is increased and transmitted to the arm member 14 at a ratio to the distance L ₂ between the rotation center and the driving force transmission position P ₁ .

On the other hand, when moving the push operation direction shown in FIG. 4, a distance L ₃ between the rotation center and the drive force transmitting position P ₂ of the crank member 13, the arm member 14 rotation center and the drive force transmitting position P ₂ The rotation of the motor 11 is decelerated and transmitted to the arm member 14 at a ratio with the distance L ₄ between them. The ratio between the distance of the push operating side L ₃ and the distance L ₄ are, it is smaller than the ratio between the distance L ₁ and the distance L ₂ of the vibration feedback side.

Therefore, the rotation center of the crank member 13 and the driving force transmission position P (P ₁ , P ₂ ) of the crank member 13 in the direction rotating to the vibration feedback side and the direction rotating to the push operation side from the initial stop position of the crank member 13 are set. The ratio between the distance L (L ₁ , L ₃ ) and the distance L (L ₂ , L ₄ ) between the rotation center of the arm member 14 and the driving force transmission position P (P ₁ , P ₂ ) is different in magnitude. By doing so, the rotation angle of the motor 11 on the vibration feedback side and the push operation side and the board surface displacement amount of the movable panel 2 are determined.

In this embodiment, the distance between the rotation of the crank member 13 and the center drive force transmitting position P ₁ at which the motor 11 and the crank member 13 is moved to the vibration feedback direction starting from the position relative to the initial stop position L ₁ and the ratio of the distance L ₂ between the center of rotation and the driving force transmitting position P ₁ of the arm member 14, as shown in FIGS. 3 and 4, the rotation of the crank member 13 when moving the push operation direction greater than the center and the ratio between the distance L ₄ between the center of rotation and the driving force transmitting position P ₂ a distance L ₃ and the arm member 14 between the drive force transmitting position P _2, the arm with respect to the amount of rotation of the crank member 13 The amount of rotation of the member 14 increases.

  Therefore, when the vibration feedback force is applied to the movable panel 2, the movable panel 2 can be largely moved toward the vibration feedback side, and a high tactile feedback force can be applied to the movable panel 2.

On the other hand, the distance L ₃ between the rotation center of the crank member 13 and the driving force transmission position P ₂ and the arm when the motor 11 and the crank member 13 move in the push operation direction starting from a position based on the initial stop position. the ratio between the distance L ₄ between the center of rotation and the driving force transmitting position P ₂ of the member 14, as shown in FIGS. 3 and 4, the rotation center and the driving force of the crank member 13 when moving in the vibration feedback direction becomes smaller than the ratio of the distance L ₂ between the center of rotation and the driving force transmitting position P ₁ of the distance L ₁ and the arm member 14 between the transfer position P _1, the rotation of the arm member 14 with respect to the amount of rotation of the crank member 13 The amount becomes smaller.

  Therefore, when a push operation force is applied to the movable panel 2, the rotation angle of the motor 11 is smaller than when a vibration feedback force is applied to the movable panel 2. Thereby, since the push operation force which reduced the influence of the cogging torque of the motor 11 is obtained, the operation feeling of the movable panel is improved.

  Here, referring to FIG. 5, the inclination angle θ of the crankshaft fitting hole 14 b of the arm member 14 is different from the straight line connecting the rotation center of the arm member 14 and the rotation center of the motor 11. The relationship between the board surface displacement amount of the movable panel 2 and the rotation angle of the motor 11 is illustrated. The motor rotation angle in the figure corresponds to the amount of rotation of the crankshaft 13a.

According to the graph shown in FIG. 5, the driving force transmission positions P ₁ and P ₂ for transmitting the driving force of the motor 11 to the crankshaft fitting hole 14b of the arm member 14 via the crankshaft 13a are shown in FIG. 2 starting from the initial stop position of the crank member 13 shown in FIG. 2, it moves along an asymmetric curved movement trajectory when rotating in the vibration feedback direction shown in FIG. 3 and rotating in the push operation direction shown in FIG. 4. To do.

  When the inclination angle θ of the crankshaft fitting hole 14b of the arm member 14 is 50 °, as shown in FIG. 5, when the motor 11 is rotated about 20 ° in the forward rotation direction, the operation panel surface 2a of the movable panel 2 is obtained. Moves 0.5 mm to the vibration feedback side.

  On the other hand, in order to move the operation panel surface 2a of the movable panel 2 to the push operation side by 0.5 mm, the movable panel 2 is rotated on the same panel surface as the vibration feedback side by rotating the motor 11 about 12 ° in the reverse rotation direction. It can be moved by the amount of displacement.

  When the inclination angle of the crankshaft fitting hole 14b of the arm member 14 is 30 °, when the operation panel surface 2a of the movable panel 2 is moved 0.5 mm in the vibration feedback direction as shown in FIG. It rotates about 16 ° in the forward rotation direction.

  On the other hand, in order to move the operation panel surface 2a of the movable panel 2 by 0.5 mm in the push operation direction, the movable panel 2 is rotated on the same panel surface as the vibration feedback side by rotating the motor 11 about 14 ° in the reverse rotation direction. It can be moved by the amount of displacement.

  From the graph shown in FIG. 5, when the inclination angle θ of the crankshaft fitting hole 14b of the arm member 14 is 30 ° or 50 °, the displacement of the panel surface of the movable panel 2 on the vibration feedback side and the push side is movable. A curve shape that changes asymmetrically with the operation panel surface 2a at the initial stop position of the panel 2 as the origin is formed. Therefore, the amount of displacement of the panel surface of the movable panel 2 on the vibration feedback side and the push side can be changed asymmetrically.

[Comparative example]
On the other hand, the crankshaft fitting hole 14b of the arm member 14 is arranged in parallel to the straight line connecting the rotation center of the arm member 14 and the rotation center of the motor 11, and the crankshaft fitting hole 14b of the arm member 14 is arranged. When the inclination angle of the movable panel 2 is 0 °, the operation panel displacement 2a of the movable panel 2 on the vibration feedback side and the push side is the operation panel surface 2a at the initial stop position of the movable panel 2, as shown by thin lines in FIG. The curve shape changes symmetrically with respect to the origin.

  As an example of a power transmission mechanism having a configuration in which the displacement of the panel surface of the movable panel 2 on the vibration feedback side and the push side is changed symmetrically, as shown in FIG. There is a gear mechanism that includes a rotating pinion 15 and a gear 16 that meshes with the pinion 15. In this gear mechanism, the rotation of the motor 11 is transmitted to the movable panel 2 with the same gear ratio when the push operation force is applied to the movable panel 2 and when the vibration feedback force is applied to the movable panel 2.

  Since the rotation of the motor 11 is transmitted to the movable panel 2 with the same gear ratio, the displacement of the panel surface of the movable panel 2 depends on whether the push operation force is applied to the movable panel 2 or the vibration feedback force is applied to the movable panel 2. It will be the same.

  When the movable panel 2 is pushed, the smaller the rotation angle of the motor 11, the less affected by the cogging torque of the motor 11, and a good operational feeling of the movable panel 2 can be obtained. When the force is applied, the rotation of the motor 11 is transmitted to the movable panel 2 with the same gear ratio as when the push operation force is applied to the movable panel 2, so that a sufficient tactile stimulation operation feeling is given to the fingers of the operator. For example, the heavy movable panel 2 cannot be moved smoothly, and the vibration stimulation operation feeling applied to the finger of the operator is impaired.

  Therefore, when the rotation angle of the motor 11 is increased, when the push operation force is applied to the movable panel 2, the rotation of the motor 11 is transmitted to the movable panel 2 with the same gear ratio as when the vibration feedback force is applied to the movable panel 2. For this reason, it is not preferable because it becomes a resistance force of the push operation of the movable panel 2 and impairs the operational feeling.

  As another example of the power transmission mechanism having a configuration in which the board surface displacement amount of the movable panel 2 on the vibration feedback side and the push side is changed symmetrically, as shown in FIG. The hole 14b is formed in parallel to the straight line connecting the rotation center of the arm member 14 and the rotation center of the motor 11, and is a link mechanism that constitutes a sliding pair that is rotatably and slidably connected to the crankshaft 13a. There is.

  Even in this link mechanism, the crankshaft 13 a of the crank member 13 is located between the driving force transmission position P at which the driving force of the motor 11 is transmitted to the crankshaft fitting hole 14 b of the arm member 14 and the rotation center of the arm member 14. The distance L is the same when the push operation force is applied to the movable panel 2 and when the vibration feedback force is applied to the movable panel 2, and the displacement of the operation surface of the movable panel 2 on the vibration feedback side and the push side is shown in FIG. As shown by a thin line in FIG. 5, the curved shape changes in a point-symmetric manner with the operation panel surface 2a at the initial stop position of the movable panel 2 as the origin. Therefore, as with the gear ratio of the gear mechanism shown in FIG. 6A, the operation function and the tactile sense presentation function cannot be made compatible.

(Effect of embodiment)
In addition to the above effects, the power transmission mechanism 10 and the input device 1 according to the present embodiment configured as described above have the following effects.

(1) The influence of the resistance force due to the cogging torque of the motor 11 can be reduced, and a good operational feeling of the movable panel 2 can be obtained.
(2) A push operation function and a tactile sensation presentation function can both be achieved with a simple configuration that does not use a special mechanism.

[Modification]
As mentioned above, although the typical structural example of the power transmission mechanism 10 and the input device 1 in this invention was demonstrated giving embodiment and the example of illustration, the modification as shown below is also possible.

(1) In the illustrated example, the crankshaft 13a of the crank member 13 and the crankshaft fitting hole 14b of the arm member 14 are connected by a sliding pair, but for example, a guide groove formed in the crank member 13 Of course, the structure which connects with the guide pin protrudingly formed in the arm member 14 by a sliding pair may be sufficient.
(2) The crankshaft fitting hole 14b is not limited to the through hole, and includes, for example, a bottomed groove having a concave cross section.
(3) Instead of the crankshaft 13a, another member such as a roller may be used.
(4) By changing the driving force transmission position, the link length, the initial set angle, and the like of the link mechanism 12, the moving amount and moving direction of the crankshaft 13a and the arm member 14 can be easily changed.
(5) In the illustrated example, the pin locking hole 2c of the connecting member 2b in the movable panel 2 and the connecting pin 14c of the arm member 14 are rotatably connected. For example, the protrusion is formed on the connecting member 2b. Of course, the structure which connected the pin and the pin latching hole formed in the arm member 14 so that rotation was possible may be sufficient.
(6) It is needless to say that the input device 1 can be applied not only to in-vehicle devices but also to various electronic / electrical devices.
(7) Even with various switch devices that do not include a touch panel, it is possible to present a tactile stimulation operation feeling to the operator's fingers, and for example, it can also be applied to an operation knob.
(8) For the input device 1, for example, the number of arrangement, the arrangement position, and the arrangement form may be appropriately selected according to the purpose of use, and the initial object of the present invention can be achieved.

  As is clear from the above description, typical embodiments, modifications, and illustrations according to the present invention have been illustrated. However, the above-described embodiments, modifications, and illustrations show the invention according to the claims. It is not limited. Therefore, it should be noted that not all the combinations of features described in the above-described embodiments, modifications, and illustrated examples are essential to the means for solving the problems of the invention.

DESCRIPTION OF SYMBOLS 1 ... Input device, 2 ... Movable panel, 2a ... Operation panel surface, 2b ... Connecting member, 2c ... Pin locking hole, 3 ... Guide piece, 10 ... Power transmission mechanism, 11 ... Motor, 11a ... Rotating shaft, 12 ... Link Mechanism 13 ... Crank member 13a ... Crank shaft 14 ... Arm member 14a ... Support shaft 14b ... Crank shaft fitting hole 14c ... Connecting pin 15 ... Pinion 16 ... Gear L (L _{1 to} L ₄ ) ... Distance, P (P ₁ , P ₂ ) ... Driving force transmission position, θ ... Inclination angle

Claims (6)

A motor capable of rotating in the forward and reverse directions to transmit power for applying a tactile feedback force;
A link mechanism in which one end is fixed to the rotation shaft of the motor, the other end of the first link member, and the other end of the second link member that is rotatably supported is rotatably and slidably connected;
With
The link mechanism is configured such that when the first link member rotates in one direction starting from the initial stop position of the first link member and when the link mechanism rotates in the other direction, the driving force of the motor is applied to the second link member. A power transmission mechanism, characterized in that the distance between the drive force transmission position for transmitting the power and the rotation center of the second link member is different.   The driving force transmission position moves along an asymmetric curved movement locus when rotating in one direction starting from the initial stop position of the first link member and rotating in the other direction. The power transmission mechanism according to claim 1.   The ratio of the distance from the rotation center of the first link member to the driving force transmission position and the distance from the rotation center of the second link member to the driving force transmission position is the initial stop position of the first link member. 3. The power transmission mechanism according to claim 1, wherein the power transmission mechanism is configured to increase in a direction rotating in one direction or a direction rotating in the other direction as a starting point. A slide groove or a crankshaft is provided at the other end of the first link member, and a crankshaft or a slide groove is provided at the other end of the second link member,
4. The slide groove according to claim 1, wherein the slide groove is inclined upward at a predetermined angle with respect to a straight line connecting a rotation center of the first link member and a rotation center of the second link member. The power transmission mechanism according to any one of the above. The power transmission mechanism according to any one of claims 1 to 4,
An operation unit movable between an initial stop position and a push operation direction separated from the initial stop position and a separation position in a vibration feedback direction;
A connecting member connected to the power transmission mechanism so as to be able to follow, and changing the motion of the power transmission mechanism into a linear motion of the operation unit;
Has
An input device having a tactile sense presenting function for presenting a tactile stimulus operation feeling to the operation unit through the power transmission mechanism and the connecting member by the rotational movement of the motor. The input device according to claim 5, wherein one end of the connection member is provided on a link facing surface side of the operation unit, and the other end is rotatably connected to the second link member.

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