JP2007090985A - Kick-down switch of accelerator device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a kick-down switch of an accelerator device reducing unnatural feeling and unpleasant feeling when an accelerator pedal is stepped by uniformly stepping an operation button. <P>SOLUTION: A curved surface part 50 is installed in a cover 23 to cover the accelerator pedal 12 side of the operation button 21. In the curved surface part 50, a width direction center part projects to the accelerator pedal 12 side. By the projection, rotational force is generated in the operation button 21, even when the position of force applied from the accelerator pedal 12 to the operation button 21, that is, a force point is deviated from the width direction center part of the operation button 21, and force is applied to a roller 41 on a side distant from the force point before a roller 42 on a side near the force point. Force applied to the two rollers 41 and roller 42 from the operation button 21 therefore becomes almost uniform. As a result, the roller 41 and the roller 42 get over an end part 37 at almost the same time. Only click feeling of one time therefore is imparted to an occupant. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a kick-down switch for an accelerator device.

  The vehicle occupant controls the engine output of the vehicle, that is, the vehicle speed, by adjusting the amount of depression of the accelerator pedal of the accelerator device. In the case of a vehicle equipped with an automatic transmission, a so-called kick-down phenomenon occurs in which the automatic transmission shifts down when the opening of the accelerator device increases with respect to the vehicle speed. Therefore, for example, on an overtaking on a highway or an uphill road, if the rider of the vehicle increases the opening of the accelerator device in order to accelerate the vehicle, the rider wants to accelerate at the current shift stage. First, kickdown occurs against the passenger's will, causing the passenger to feel uncomfortable. This is because the occupant cannot recognize the degree of opening of the accelerator device when the kick-down occurs.

  Therefore, a kickdown switch is known in which the opening degree of the accelerator device increases and the pedaling force of the accelerator device changes in a region where kickdown occurs. By installing the kick-down switch, the pedal force of the accelerator device changes when the opening of the accelerator device reaches a position that causes kick-down. Therefore, the occupant can recognize whether or not kick-down occurs due to a change in the pedaling force of the accelerator device.

The kick-down switch is activated when the accelerator opening is equal to or greater than a predetermined value. For this reason, the kick-down switch has a configuration as shown in FIG. 8 (for example, Patent Document 1 as a related technique to be referred to).
JP 59-86619 A

  As shown in FIG. 8, the conventional kick-down switch includes an operation button 101 that contacts an accelerator pedal of an accelerator device. The operation button 101 moves in the axial direction within the casing 102 by contacting the accelerator pedal. The operation button 101 is pressed by an elastic member (not shown) in the direction opposite to the moving direction when the accelerator pedal is depressed. The operation button 101 accommodates moving members 103 and 104 that are movable in the radial direction. The moving members 103 and 104 are pressed against the casing 102 by the elastic member 105. The casing 102 has a recess 106 at the end on the accelerator pedal side.

  When the accelerator pedal and the kick down switch are not in contact with each other, the operation button 21 is located on the accelerator pedal side as shown in FIG. 8A, and the moving members 103 and 104 are accommodated in the recess 106 of the casing 102. When the accelerator pedal is depressed, the moving members 103 and 104 are in contact with the first wall 107 of the operation button 101 and receive a force on the opposite side of the accelerator pedal, that is, downward in FIG. When the forces received by the moving members 103 and 104 become larger than a predetermined value, the moving members 103 and 104 are at the end of the recess 106 opposite to the accelerator pedal, as shown in FIGS. 8B and 8C. Get over part 108. As a result, the operation button 101 moves to the side opposite to the accelerator pedal. At this time, the passenger who steps on the accelerator pedal obtains a click feeling from the accelerator pedal by operating the kick-down switch.

  However, the force applied from the accelerator pedal to the operation button 101 is not always applied to the central portion of the operation button 101 in the width direction. That is, the force point at which force is applied from the accelerator pedal to the operation button 101 due to dimensional errors of the accelerator pedal and the kick-down switch of the accelerator device is shifted from the center in the width direction of the operation button 101 to either end side. Yes. Therefore, the operation button 101 rotates, and the force applied from the operation button 101 to the moving members 103 and 104 becomes uneven. As a result, when a force is applied from the accelerator pedal to the operation button 101, the two moving members 103 and 104 accommodated in the operation button 101 have different timings as shown in FIGS. 8B and 8C. Get over the end 108. Thereby, the passenger who depresses the accelerator pedal will feel the click feeling twice. In particular, a greater force is applied to the moving member 104 that moves later by the moving member 103 that moves first. Therefore, the later click feeling becomes larger than the previous click feeling in the two click feelings before and after. Therefore, the passenger feels uncomfortable and uncomfortable.

  Accordingly, an object of the present invention is to provide a kick-down switch for an accelerator device that reduces an uncomfortable feeling and an uncomfortable feeling when an operation button is depressed uniformly and an accelerator pedal is depressed.

  According to the first or second aspect of the invention, the operation button includes a curved surface portion on the accelerator pedal side. Thereby, force is applied to the curved surface portion from the accelerator pedal. Therefore, when the position where the force is applied from the accelerator pedal to the operation button is shifted, the operation button is inclined by the force applied to the curved surface portion. As a result, when the operation button receives a force from the accelerator pedal, a rotational force is applied to the operation button, and the operation button is depressed evenly. Therefore, it is possible to reduce a sense of incongruity and discomfort when the accelerator pedal is depressed.

  In the invention described in claim 3, the radius of the curved surface portion is defined as follows.

  When the force point that receives the force from the accelerator pedal is shifted to either end from the center in the width direction of the operation button, the moving member far from the force point of the two moving members is compared to the moving member closer to the force point. The applied force becomes smaller. Therefore, in the invention described in claim 3, by defining the radius of the curved surface portion, it is possible to apply a force to the moving member far from the power point among the two moving members prior to the moving member near the power point. That is, after a certain amount of force is applied to the moving member far from the power point, the force is applied to the moving member close to the power point. Therefore, a force is applied to the moving member near the power point after the moving member far from the power point is pushed to some extent. Thereby, the time when the moving member that is far from the power point and the moving member that is close to the moving point starts to move from the recess is almost the same. Therefore, the operation button is depressed evenly, and the uncomfortable feeling and uncomfortable feeling when the accelerator pedal is depressed can be reduced.

  In the invention according to claim 4, the curved surface portion may be set on a cover installed on the accelerator pedal side of the operation button. That is, the curved surface portion may be installed integrally with the operation button, or may be installed on a cover that covers the operation button.

Hereinafter, an embodiment of an accelerator apparatus according to the present invention will be described with reference to the drawings.
As shown in FIG. 2, the accelerator apparatus 10 according to an embodiment of the present invention includes a main body 11, an accelerator pedal 12, and a kick down switch 20. The main body 11 has a shaft portion 13. The accelerator pedal 12 is rotatable about the shaft portion 13 of the main body 11. The accelerator pedal 12 has a pad (not shown) attached to the end 14 opposite to the main body 11. When the passenger of the vehicle depresses the pad, the accelerator pedal 12 rotates around the shaft portion 13 toward the kick-down switch 20 side. The main body 11 of the accelerator device 10 includes a detection unit (not shown) that detects the amount of depression of the accelerator pedal 12 inside. As a result, the main body 11 detects the depression amount of the accelerator pedal 12 and outputs an electrical signal corresponding to the depression amount of the accelerator pedal 12 to an ECU (not shown). The accelerator pedal 12 has a pedal button 15 on the kick-down switch 20 side. The pedal button 15 moves together with the accelerator pedal 12 and can contact the kick-down switch 20.

  The kick down switch 20 is installed in the main body 11. The kick down switch 20 has an operation button 21, a casing 30, and a cover 23 as shown in FIG. The operation button 21 is covered with a cover 23 on the accelerator pedal 12 side. The pedal button 15 of the accelerator pedal 12 can contact the end of the cover 23 opposite to the operation button 21. The operation button 21 has a first wall portion 24 that protrudes radially outward at an end portion on the accelerator pedal 12 side. The operation button 21 has a second wall portion 25 that forms a predetermined interval with the first wall portion 24 in the axial direction and protrudes in a radial direction substantially parallel to the first wall portion 24. Since the first wall portion 24 and the second wall portion 25 form a predetermined interval, an accommodation chamber 26 is formed between the first wall portion 24 and the second wall portion 25. The operation button 21 has a leg portion 27 that protrudes from the end on the second wall portion 25 side to the side opposite to the accelerator pedal 12. The leg 27 extends in the axial direction at the center of the operation button 21. The operation button 21 has a cap portion 28 that covers the outer side in the radial direction of the first wall portion 24 and the second wall portion 25. The shade portion 28 is formed by folding back from the end of the operation button 21 on the accelerator pedal 12 side to the side opposite to the accelerator pedal 12. A predetermined gap is formed between the first wall portion 24 and the second wall portion 25 and the shade portion 28.

  The casing 30 is formed in a cylindrical shape, and the operation button 21 is accommodated therein so as to be movable in the axial direction. The casing 30 has a cylindrical portion 31 that accommodates the leg portion 27 of the operation button 21 at the center. The inner wall of the cylindrical part 31 slides with the outer wall of the leg part 27. Further, the outer wall of the casing 30 slides with the inner wall of the cap portion 28. Thereby, the operation button 21 is guided in the axial movement by the casing 30 that slides with the leg portion 27 and the cap portion 28. The direction in which the operation button 21 moves inside the casing 30, that is, the vertical direction in FIG. 1 is the axial direction of the operation button 21. Moreover, the left-right direction of FIG. 1 perpendicular to the axis of the operation button 21 is the width direction of the operation button 21 defined in the claims. A spring 32 as an elastic member is housed inside the casing 30 together with the operation button 21. The spring 32 has a force extending in the axial direction. Therefore, the spring 32 presses the operation button 21 toward the accelerator pedal 12 side.

  The kick down switch 20 includes rollers 41 and 42 as moving members accommodated in the accommodating chamber 26 of the operation button 21. The rollers 41 and 42 can move inside the storage chamber 26 in the radial direction of the operation button 21, that is, in the width direction of the operation button 21. The rollers 41 and 42 move in the axial direction together with the operation button 21 as the operation button 21 moves in the axial direction. The kickdown switch 20 includes a pressing unit that presses the rollers 41 and 42 against the inner wall of the casing 30. In this embodiment, the pressing means includes a spring 33 as an elastic member and a pad 34 that transmits the pressing force of the spring 33 to the rollers 41 and 42. The spring 33 has a force that extends in the radial direction of the operation button 21. Therefore, the spring 33 presses the rollers 41 and 42 against the inner wall side of the casing 30 via the pad 34.

  The rollers 41 and 42 are formed in a substantially cylindrical shape. The outer diameters of the rollers 41 and 42 are slightly smaller than the storage chamber 26 formed between the first wall portion 24 and the second wall portion 25 of the operation button 21. Therefore, the rollers 41 and 42 can move not only in the radial direction of the operation button 21, that is, in the width direction of the operation button 21 but also in the axial direction of the operation button 21 by the pressing force of the spring 33.

  The casing 30 has a recess 35 in the inner wall. The recess 35 is installed at the end of the casing 30 on the accelerator pedal 12 side. The recess 35 is recessed from the operation button 21 side to the radially outer side on the inner wall of the casing 30. The recess 35 has substantially the same shape as the outer shape of the rollers 41 and 42. Thereby, the rollers 41 and 42 are accommodated in the recess 35. The casing 30 has a guide surface portion 36 on the opposite side of the recess 35 from the accelerator pedal 12. The guide surface portion 36 is formed to extend from the end of the recess 35 opposite to the accelerator pedal 12 to the opposite side of the accelerator pedal 12. An end portion 37 is formed at a connection portion between the concave portion 35 and the guide surface portion 36. Thereby, the rollers 41 and 42 get over the end portion 37 when moving from the recess 35 to the guide surface 36 and when moving from the guide surface 36 to the recess 35. The rollers 41 and 42 that have passed over the end portion 37 from the recess 35 move in the axial direction of the operation button 21 together with the operation button 21 while being in contact with the guide surface portion 36.

  The cover 23 covers the accelerator pedal 12 side of the operation button 21 as described above. The cover 23 has a curved surface portion 50 on the side opposite to the operation button 21, that is, on the accelerator pedal 12 side. The curved surface portion 50 is formed in a convex curved shape that protrudes toward the accelerator pedal 12 from both ends to the center in the width direction of the operation button 21.

Next, the shape of the curved surface portion 50 will be described in detail.
When the pedal button 15 and the operation button 21 are in contact with each other in the center of the operation button 21 in the width direction, force is uniformly applied to the two rollers 41 and 42 from the first wall portion 24 of the operation button 21. However, the pedal button 15 of the accelerator pedal 12 does not necessarily touch the center in the width direction of the operation button 21 due to dimensional errors of the main body 11 of the accelerator device 10, the accelerator pedal 12, and the kick down switch 20. That is, a force is applied from the pedal button 15 to the operation button 21 at a position shifted from the center in the width direction of the operation button 21 to either side of the end.

  FIG. 3 shows, as an example, a point where a force is applied from the accelerator pedal to the operation button 21, that is, a case where the force point P is shifted to the roller 42 side. FIG. 3 is a schematic diagram showing a simplified configuration of a part of the kick-down switch 20 of the present embodiment. At this time, a pedaling force Fkd is applied from the accelerator pedal 12 to the operation button 21. A distance from the center of the operation button 21, that is, the center axis cl of the operation button 21 and the force point P to which the pedaling force Fkd is applied from the accelerator pedal 12 is defined as L. When a pedaling force Fkd is applied from the accelerator pedal 12 to the operation button 21, the pedaling force Fkd is decomposed into a pressing force F in a direction perpendicular to the curved surface portion 50 at the force point P and a rotational torque T2r0 in the tangential direction of the curved surface portion 50. Further, the pressing force F applied in the direction perpendicular to the curved surface portion 50 from the pedaling force Fkd is broken down into a component force F1 in the axial direction of the operation button 21 and a component force F2 in the width direction of the operation button 21. The pressing force with which the spring 32 presses the operation button 21 toward the accelerator pedal 12 is defined as F0.

  Here, when the roller 41 and the roller 42 are in contact with the first wall portion 24 of the operation button 21, the force received by the roller 41 from the first wall portion 24 is defined as FL, and the roller 42 from the first wall portion 24 The force received is defined as FR. Further, the distance between the center of the roller 41 and the center of the roller 42 is defined as L1. As a result, when the pedaling force Fkd is applied from the accelerator pedal 12 to the operation button 21, the force applied to the roller 41 and the roller 42 is as follows.

FR = F1 × (L1 / 2 + L) / L1 (1)
FL = F1 × (L1 / 2−L) / L1 (2)
The torque TL applied to the roller 41 and the torque TR applied to the roller 42 by the forces FL and FR applied to the rollers 41 and 42 are as follows. Here, when the rotation center c in the width direction of the operation button 21 is set and a virtual straight line VL1 connecting the rotation center c and the contact cr with the roller 41 is set, the center axis cl and the virtual straight line VL1 of the operation button 21 are set. Let θc be the angle formed by. When a virtual straight line VL2 connecting the rotation center c and the force point P is set, an angle formed by the central axis cl of the operation button 21 and the virtual straight line VL2 is set to θ0. Further, the distance between the rotation center c and the contact cr on the virtual straight line VL1 is Rc, and the distance between the rotation center and the power point on the virtual straight line VL2 is R0.

TR = FR × sin (θc) × Rc (3)
TL = FL × sin (θc) × Rc (4)
Further, when the pedaling force Fkd is applied to the force point P, the rotational torque T2r0 applied to the curved surface portion 50 is as follows.
T2r0 = F2 × cos (θ0) × R0 (5)

The balance of rotational torque is as follows:
TR = TL + T2r0 (6)
By substituting Equation (3), Equation (4) and Equation (5) into Equation (6) above, Equation (7) is obtained.
(FR−FL) = F2 × cos (θ0) × R0 / (sin (θc) × Rc) (7)
When the radius R of the curved surface portion 50 is obtained from the above equation (7), the following equation (8) is obtained.

  The radius R of the curved surface portion 50 of the cover 23 only needs to be equal to or smaller than the value obtained by the above equation (8), and therefore, the following equation (9) may be satisfied.

  By setting the radius R of the curved surface portion 50 of the cover 23 as described above, when the pedaling force Fkd is applied to the curved surface portion 50, the operation button 21 to which the cover 23 is attached has a rotation center c as shown in FIG. A rotational force around the center is generated. Therefore, when the stepping force Fkd is applied to the curved surface portion 50, the force FL is applied to the roller 41 far from the force point P prior to the roller 42 close to the force point P. That is, when the pedaling force Fkd is applied to the curved surface portion 50, the force FL is first applied to the roller 41, and then the force FR is applied to the roller 42. As a result, almost the same force is always applied between the two rollers 41 and 42. Therefore, the roller 41 and the roller 42 get over the end portion almost simultaneously.

Next, the operation of the accelerator apparatus 10 having the above configuration will be described.
When the vehicle occupant does not depress the accelerator pedal 12, the accelerator pedal 12 is in the position shown in FIG. 2 by an elastic member (not shown) installed in the main body 11. Therefore, the accelerator pedal 12 is separated from the kick down switch 20. At this time, the operation button 21 of the kick down switch 20 is positioned closest to the accelerator pedal 12 by the pressing force of the spring 32 as shown in FIG. The rollers 41 and 42 accommodated in the accommodation chamber 26 are pressed against the inner wall side of the casing 30 by the pressing force of the spring 33, and are accommodated in the recess 35 of the casing 30.

  As the passenger of the vehicle depresses the accelerator pedal 12, the accelerator pedal 12 gradually approaches the kick-down switch 20. The accelerator pedal 12 is pressed in a direction opposite to the direction in which the accelerator pedal 12 is depressed by an elastic member (not shown) installed in the main body 11. Thereby, the elastic force applied to the accelerator pedal 12 from an elastic member (not shown) gradually increases. As a result, the depression force of the accelerator pedal 12 by the vehicle occupant increases as the rotation angle of the accelerator pedal 12, that is, the depression amount increases, as shown by the solid line in FIG. At this time, the main body 11 outputs a predetermined voltage to an ECU (not shown). The voltage output from the main body 11 increases according to the depression force of the accelerator pedal 12, that is, the depression amount, as shown in FIG.

  When the vehicle occupant further depresses the accelerator pedal 12, the pedal button 15 of the accelerator pedal 12 contacts the kick-down switch 20, as shown in FIG. At this time, the operation button 21 of the kick-down switch 20 contacts the rollers 41 and 42 in which the first wall portion 24 is accommodated in the accommodation chamber 26. The rollers 41 and 42 are accommodated in a recess 35 on the inner wall of the casing 30. The rollers 41 and 42 are pressed against the concave portion 35 by the spring 33. Thus, even when force is applied to the rollers 41 and 42 from the first wall portion 24 of the operation button 21, the movement of the rollers 41 and 42 is restricted by the end portion 37 formed at the connection portion between the concave portion 35 and the guide surface portion 36. Has been. Therefore, the rollers 41 and 42 do not move from the recess 35 until the force applied to the rollers 41 and 42 reaches a predetermined magnitude. As a result, when the pedal button 15 of the accelerator pedal 12 comes into contact with the kick-down switch 20, the rollers 41 and 42 do not move until the pedal force of the accelerator pedal 12 reaches a predetermined magnitude, and the accelerator pedal 12 temporarily stops. At this time, the output voltage output from the detection unit of the main body 11 becomes Vo corresponding to the accelerator fully open.

  Then, when the depression force of the accelerator pedal 12 by the rider further increases as shown in FIG. 4 and the depression force reaches M, the rollers 41 and 42 move over the end portion 37 and move to the guide surface portion 36. Thereby, the movement restriction of the rollers 41 and 42 is released, and the accelerator pedal 12 is further depressed as shown in FIG. When the movement restriction of the rollers 41 and 42 is released, the operation button 21 moves together with the accelerator pedal 12, and the accelerator pedal 12 is further depressed.

  At this time, when the pedaling force by the rider reaches M, the roller 41 and the roller 42 get over the end portion 37 at the same time, and the rider feels a single click feeling as shown by the solid line in FIG. Further, as in the present embodiment, by installing the curved surface portion 50 on the cover 23, a force is applied prior to the roller 41, so there is a difference in the timing of overcoming the end portion 37 between the roller 41 and the roller 42. In some cases, as shown by the broken line in FIG. 4, the click feeling by the roller 41 that gets over the end portion 37 first becomes larger than the click feeling by the roller 42 that gets over the end portion 37 later. For this reason, even when there is a difference in the timing at which the click feeling is generated between the roller 41 and the roller 42, the passenger first obtains a large click feeling by the roller 41, and thus the click feeling by the subsequent roller 42 becomes difficult to feel. As a result, discomfort and discomfort given to the passenger are reduced.

  As shown in FIG. 7, the roller 41 that has passed over the end portion 37 is guided by the guide surface portion 36 and moves to the side opposite to the accelerator pedal 12. At this time, the detection unit of the main body 11 outputs a voltage corresponding to a change in the depression amount of the accelerator pedal 12 to an ECU (not shown). When the output voltage becomes higher than Vc as shown in FIG. 4, the ECU (not shown) determines that the kick-down switch 20 is turned on, and the ECU kicks down the automatic transmission. On the other hand, the vehicle occupant feels a click feeling when the rollers 41 and 42 get over the end portions. With this click feeling, the passenger feels that the kick-down switch 20 has been turned on.

  When the depression force of the accelerator pedal 12 by the passenger decreases, the accelerator pedal 12 is pushed back by an elastic member (not shown) installed in the main body 11. At the same time, the operation button 21 of the kick down switch 20 is pushed back to the accelerator pedal 12 side by the spring 32. The rollers 41 and 42 receive a force from the spring 33 via the pad 34. Therefore, the rollers 41 and 42 move to the accelerator pedal 12 side together with the operation button 21 while being in contact with the guide surface portion 36. Then, when the rollers 41 and 42 move along the guide surface portion 36 to the end portion 37, the rollers 41 and 42 get over the end portion 37 and are accommodated in the recess 35.

  In the above-described embodiment, the curved surface portion 50 is installed on the cover 23 that covers the accelerator pedal 12 side of the operation button 21. Thereby, even when the position of the force applied from the accelerator pedal 12 to the operation button 21, that is, the force point P deviates from the central portion in the width direction of the operation button 21, the roller 41 on the side far from the force point P has a roller closer to the force point P. Power is applied prior to 42. Therefore, the force applied from the operation button 21 to the two rollers 41 and 42 is substantially uniform. As a result, the roller 41 and the roller 42 get over the end 37 almost simultaneously. Therefore, it is possible to give the passenger only a single click feeling and to reduce discomfort and discomfort given to the passenger who steps on the accelerator pedal 12. Further, even when the timing of getting over the end 37 is different between the roller 41 and the roller 42, the roller 41 that gets over the end 37 first has a larger click feeling than the roller 42 that gets over the end 37 later. give. Therefore, the uncomfortable feeling and discomfort given to the passenger can be reduced.

  In the embodiment of the present invention described above, the example in which the curved surface portion 50 is installed on the cover 23 that covers the operation button 21 has been described. However, the curved surface portion 50 may be installed integrally with the operation button 21 at the end of the operation button 21 on the accelerator pedal 12 side. Moreover, in one Embodiment of this invention, the example which forms the curved surface part 50 in the convex curved surface shape which protrudes in the accelerator pedal 12 side was demonstrated. However, the curved surface portion 50 may be formed in a concave curved surface shape that is recessed from the accelerator pedal 12 side to the operation button 21 side.

  As described above, the present invention is not limited to the above-described embodiment, and can be applied to various embodiments without departing from the gist thereof.

It is sectional drawing in the II line | wire of FIG. It is the schematic which shows the accelerator apparatus by one Embodiment of this invention, Comprising: It is a figure which shows the state which is not applying force from a passenger to an accelerator pedal. It is the schematic which shows the relationship of the force added to the kickdown switch of the accelerator apparatus by one Embodiment of this invention. In the accelerator apparatus by one Embodiment of this invention, it is a schematic diagram which shows the relationship between the rotation angle of an accelerator pedal, pedal effort, and an output voltage. It is the schematic which shows the accelerator apparatus by one Embodiment of this invention, Comprising: It is a figure which shows the state which the accelerator pedal and the kickdown switch contacted. It is the schematic which shows the accelerator apparatus by one Embodiment of this invention, Comprising: It is a figure which shows the state in which the accelerator pedal was stepped on most by the passenger. It is sectional drawing cut | disconnected by the VII-VII line of FIG. It is the schematic which shows the movement of the roller of the kickdown switch in the conventional accelerator apparatus.

Explanation of symbols

  10 accelerator device, 12 accelerator pedal, 20 kick-down switch, 21 operation button, 23 cover, 30 casing, 35 recess, 41 roller, 42 roller, 50 curved surface portion

Claims (4)

A kick-down switch of an accelerator device that outputs a signal for kick-down when the amount of depression of the accelerator pedal exceeds a predetermined amount,
When the amount of depression of the accelerator pedal is a predetermined amount or more, an operation button that moves in the axial direction by depression of the accelerator pedal; and
A curved surface portion that is installed on the accelerator pedal side of the operation button, moves together with the operation button, and contacts the accelerator pedal;
A kick-down switch for an accelerator device comprising:   2. The kick down switch according to claim 1, wherein the curved portion has a convex curved shape that protrudes toward the accelerator pedal from both ends in the width direction of the operation button to a central portion. Two moving members accommodated in the operation button so as to be movable in the width direction of the operation button perpendicular to the axis;
The inner wall of the end portion on the accelerator pedal side is formed to be recessed from the operation button side to the opposite side to the operation button, and has two recesses that can accommodate the moving member, and the operation button is accommodated so as to be movable in the axial direction. And a casing to be
The distance between the center of the operation button in the width direction and the force point at which the operation button receives force from the accelerator pedal is L,
The distance from the rotation center in the width direction of the operation button to the contact point between the operation button and the moving member far from the power point among the two moving members is Rc,
The distance between the centers of the two moving members is L1,
Θc is an angle formed by a central axis passing through the central portion in the width direction of the operation button and a virtual straight line connecting the contact point from the rotation center,
When the angle formed by the virtual central axis and a virtual straight line connecting the power points from the rotation center is θ0,
The radius R of the curved surface portion is

The kick down switch according to claim 2.   The kick down switch according to claim 1, 2, or 3, further comprising a cover that is installed on the accelerator pedal side of the operation button and has the curved surface portion on the opposite side to the operation button.

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