Force sense imparting input device

Abstract

A force sense imparting type input device (100) is provided with: a base (3); an operating member (1) supported so as to be movable in the Z-axis direction with respect to the base (3); a shape memory alloy wire (4), the length of which changes when the operation member (1) moves toward the Z2 side; and a control device (10) that is electrically connected to the shape memory alloy wire (4) and that changes the length of the shape memory alloy wire (4) by changing the current flowing through the shape memory alloy wire (4) when the operation member (1) that moves toward the Z2 side reaches the first position. The control device (10) measures the resistance value of the shape memory alloy wire (4) by causing the measurement current to flow through the shape memory alloy wire (4), and detects the position of the operation member (1) on the basis of the resistance value.

Description

Technical Field

[0001] This invention relates to a force-feeding input device. Background Technology

[0002] Previously, keyboards (input devices) were known to use shape memory alloy wires to generate a simulated click sensation when a key switch was pressed (see Patent Document 1).

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2020-035143 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] However, the keyboard described above needs a position detection unit to detect electrostatic capacitance in order to detect when a key switch is pressed, which may lead to a more complex structure.

[0008] Therefore, it is desirable to provide force-sensing input devices with a simpler structure.

[0009] Methods for solving problems

[0010] A force-feeding input device according to one embodiment of the present invention includes: a base; an operating member supported for movable relative to the base in a first direction; a shape memory alloy wire whose length changes by moving the operating member toward one side in the first direction; and a control device electrically connected to the shape memory alloy wire, which, when the operating member moving toward one side reaches a first position, causes a change in the current flowing in the shape memory alloy wire to change the length of the shape memory alloy wire. The force-feeding input device is characterized in that the control device causes a measuring current to flow in the shape memory alloy wire to measure the resistance value of the shape memory alloy wire, and detects the position of the operating member based on the resistance value.

[0011] Invention Effects

[0012] The aforementioned methods can provide force-feeding input devices with simpler structures. Attached Figure Description

[0013] Figure 1 This is a diagram showing an example of the structure of an input device.

[0014] Figure 2 It constitutes Figure 1 A perspective view of the operating components of the input device.

[0015] Figure 3 This is a flowchart illustrating an example of the force perception processing procedure.

[0016] Figure 4 yes Figure 1 A cross-sectional view of the input device.

[0017] Figure 5 This is a diagram showing another structural example of an input device.

[0018] Figure 6 yes Figure 5 A sectional perspective view of the input device.

[0019] Figure 7 yes Figure 5 The right-side view of the input device.

[0020] Figure 8 yes Figure 5 A cross-sectional view of the input device.

[0021] Figure 9 This is a diagram showing another structural example of an input device.

[0022] Figure 10 yes Figure 9 A cross-sectional view of the input device. Detailed Implementation

[0023] Hereinafter, the force-sensing input device 100 according to an embodiment of the present invention will be described with reference to the accompanying drawings. Figure 1 This is a diagram illustrating a structural example of the input device 100. Specifically, Figure 1 The image above (the image above the block arrow) is an exploded perspective view of the input device 100. Additionally, Figure 1 The following diagram (the diagram below the block arrow) is a schematic diagram of a force-feeding input system SYS consisting of a control device 10, a power supply device 11, a resistance value detection device 12, and an input device 100, and includes a perspective view of the input device 100 in its combined state.

[0024] Figure 1In this system, X1 represents one direction of the X-axis constituting a three-dimensional orthogonal coordinate system, and X2 represents the other direction of the X-axis. Similarly, Y1 represents one direction of the Y-axis constituting a three-dimensional orthogonal coordinate system, and Y2 represents the other direction of the Y-axis. Likewise, Z1 represents one direction of the Z-axis constituting a three-dimensional orthogonal coordinate system, and Z2 represents the other direction of the Z-axis. In this embodiment, the X1 side of the input device 100 corresponds to the front side (front face) of the input device 100, and the X2 side of the input device 100 corresponds to the rear side (back face) of the input device 100. Furthermore, the Y1 side of the input device 100 corresponds to the left side of the input device 100, and the Y2 side of the input device 100 corresponds to the right side of the input device 100. Moreover, the Z1 side of the input device 100 corresponds to the upper side of the input device 100, and the Z2 side of the input device 100 corresponds to the lower side of the input device 100. The same applies to other figures.

[0025] like Figure 1 As shown in the figure above, the input device 100 has an operating component 1, a support component 2, a base 3, a shape memory alloy wire 4, and a conductive component 5.

[0026] Operating member 1 is a member that bears the operating force based on the operator. In the example shown, operating member 1 is a member formed of synthetic resin and is supported by support member 2 so that it can move along operating axis OA parallel to the first direction (Z-axis direction).

[0027] The support member 2 is disposed between the operating member 1 and the base 3 and is configured to elastically support the operating member 1. In the example shown, the support member 2 is a leaf spring made of a non-magnetic material and has an inner fixing part 2C, an outer fixing part 2E, and four elastic arms 2G. The inner fixing part 2C is fixed to the operating member 1, the outer fixing part 2E is fixed to the base 3, and the four elastic arms 2G are the parts that connect the inner fixing part 2C and the outer fixing part 2E and are elastically deformable.

[0028] The base 3 is a component that supports the support member 2. In the example shown, the base 3 is a component made of synthetic resin and has a generally rectangular shape. Specifically, the base 3 is a lidless box-shaped component with an outer peripheral wall portion 3A and a base plate portion 3T. A rectangular ring-shaped pedestal portion 3D is formed on the inner side of the outer peripheral wall portion 3A, and it has four generally prismatic protrusions 3P that protrude upward from the upper surface (inner bottom surface) of the base plate portion 3T. The outer fixing portion 2E of the support member 2 is fixed to the base 3 by an adhesive or the like while it is placed on the pedestal portion 3D.

[0029] The shape memory alloy wire 4 is an example of a shape memory actuator and constitutes the drive unit for driving the operating member 1. In the example shown, the shape memory alloy wire 4 heats up when current flows through it and contracts accordingly. The drive unit can apply force to the operating member 1 by utilizing the contraction of the shape memory alloy wire 4.

[0030] Specifically, the shape memory alloy wire 4 is stretched into a straight line when an electric current is supplied. In this state, when the operating member 1 is pressed by the operator, the shape memory alloy wire 4 is arranged to be stretched by being pulled downward by the operating member 1 which moves downward.

[0031] The conductive member 5 is a component used to conduct electricity to the shape memory alloy wire 4, and is formed of a magnetic metal such as iron. In the illustrated example, the conductive member 5 has: a front conductive member 5F, which is fixed to one end (front end) of the shape memory alloy wire 4; and a rear conductive member 5B, which is fixed to the other end (rear end) of the shape memory alloy wire 4. Furthermore, both the rear conductive member 5B and the front conductive member 5F have: a terminal portion 5T, which is inserted into a through hole 3H1 formed in the base plate portion 3T of the base 3; and a top portion 5E, which is inserted into a non-through hole 3H2 formed in the base plate portion 3T of the base 3. That is, the conductive member 5 is mounted on the base 3 such that the terminal portion 5T protrudes downward from the lower surface of the base 3. Figure 1 In the middle, the through hole 3H1 and the non-through hole 3H2 corresponding to the rear conductive member 5B are visible, but the through hole 3H1 and the non-through hole 3H2 corresponding to the front conductive member 5F are not visible.

[0032] The control device 10 is configured to provide force feedback when the operating member 1 is operated by an operator. In the example shown, the control device 10 is a microcomputer equipped with a CPU and memory. It should be noted that in the example shown, the control device 10 is located outside the base 3, but it may also be located inside the base 3. In this case, the control device 10 may also be a component of the input device 100.

[0033] The energizing device 11 is a device for supplying current to the shape memory alloy wire 4. In the example shown, the energizing device 11 is configured to supply current to the shape memory alloy wire 4 according to a control command from the control device 10.

[0034] The resistance detection device 12 is a device for detecting the resistance value of the shape memory alloy wire 4. In the example shown, the resistance detection device 12 is configured to repeatedly detect the resistance value of the shape memory alloy wire 4 at a predetermined detection cycle and output the detected value to the control device 10. It should be noted that, typically, the resistance value of the shape memory alloy wire 4 increases as the shape memory alloy wire 4 is stretched and as the temperature of the shape memory alloy wire 4 increases.

[0035] Here, refer to Figure 2 Details of operating component 1 are explained. Figure 2 This is a three-dimensional view of operating component 1. Specifically, Figure 2 The image above is a three-dimensional view of the upper part of the operating component 1. Figure 2 The image below is a three-dimensional view of the lower part of the operating component 1.

[0036] like Figure 2 As shown, the operating member 1 has: a flat plate portion 1T that is generally rectangular in shape when viewed from above; and an upper protrusion 1B that is generally hemispherical in shape, which is formed to protrude upward from the center of the upper surface of the flat plate portion 1T. In addition, the operating member 1 has: four first lower protrusions 1P that are generally prismatic in shape, which are formed to protrude downward from the lower surface of the flat plate portion 1T; a second lower protrusion 1Q that is generally cylindrical in shape, which is formed to protrude downward from the center of the lower surface of the flat plate portion 1T; and a third lower protrusion 1R that is generally cylindrical in shape, which is formed to protrude downward from the center of the lower surface of the second lower protrusion 1Q.

[0037] The upper protrusion 1B is formed in a manner that extends along the operating axis OA, and is configured such that the operating member 1 can be moved downward by the operator pressing down on the upper protrusion 1B. That is, the upper protrusion 1B is disposed in the center of the flat plate portion 1T in such a manner that the operator can press the operating member 1 downward along the operating axis OA.

[0038] The first lower protrusion 1P is formed opposite to the protrusion 3P formed on the upper surface of the base plate portion 3T of the base 3. The first lower protrusion 1P and the protrusion 3P may also be formed, for example, by placing a helical spring between them. This is to prevent the operating member 1 from tilting when moving downward. Alternatively, the first lower protrusion 1P and the protrusion 3P may also be formed to function as a limiter mechanism for preventing the operating member 1 from moving excessively downward.

[0039] The second lower protrusion 1Q is the part for fixing the inner fixing part 2C of the support member 2. The third lower protrusion 1R is the part that holds the middle part 4M of the shape memory alloy wire 4. In the example shown, the inner fixing part 2C of the support member 2 is as follows: Figure 1 As shown, it has a roughly annular shape when viewed from above. Furthermore, the third lower protrusion 1R is configured to insert into a circular through hole 2H formed in the center of the inner fixing part 2C. With the lower surface of the second lower protrusion 1Q resting on the upper surface of the inner fixing part 2C and the third lower protrusion 1R inserted into the through hole 2H, the inner fixing part 2C of the support member 2 is fixed to the operating member 1 by means of an adhesive or the like.

[0040] Additionally, a groove 1G extending in a direction perpendicular to the operating axis OA (X-axis direction) is formed on the lower surface of the third lower protrusion 1R. In the example shown, the middle portion 4M of the shape memory alloy wire 4, located between one end (front end) and the other end (rear end), is embedded in the groove 1G and fixed to the operating member 1 by means of an adhesive or the like.

[0041] Next, refer to Figure 3 as well as Figure 4 The process by which the control device 10 supplies current to the shape memory alloy wire 4 to impart force to the operator when the operating component 1 is operated (pressed) will be described (hereinafter referred to as "force imparting process"). Figure 3 This is a flowchart illustrating an example of the force sensing application process. In the example shown, the control device 10 is configured to switch between an on and off state, and is configured to perform the force sensing application process whenever switching from the off state to the on state. Furthermore, the control device 10 is configured to repeatedly acquire the resistance value (resistance value of the shape memory alloy wire 4) detected by the resistance value detection device 12 at a predetermined sampling period.

[0042] Figure 4 This is a cross-sectional view of the input device 100. Specifically, Figure 4 The input device 100 is viewed from the Y2 side and includes... Figure 1 The diagram below is obtained by examining a cross-section of the imaginary plane parallel to the XZ plane, represented by the dashed line L1. More specifically, Figure 4 The diagram above shows the state of the input device 100 when the operating component 1 is not pressed downwards. Figure 4 The following diagram shows the state of the input device 100 when the operating member 1 is pressed downwards. Additionally, in Figure 4 In order to make it clear, the force F1 of the operator who wants to press the operating component 1 downward is represented by a white block arrow, and the force F2 based on the shape memory alloy wire 4 that wants to push the operating component 1 upward is represented by a black block arrow.

[0043] Initially, the control device 10 supplies a measuring current to the shape memory alloy wire 4 (step ST1). When the measuring current is supplied, the shape memory alloy wire 4 is stretched into a straight line between the front conductive member 5F and the rear conductive member 5B. The measuring current is supplied to measure the resistance value R of the shape memory alloy wire 4 and has a preset value.

[0044] Next, the control device 10 measures the resistance value R of the shape memory alloy wire 4 (step ST2). In the example shown, the control device 10 measures the resistance value R based on the output of the resistance detection device 12.

[0045] Next, the control device 10 determines whether the resistance value R exceeds the first threshold TH1 (step ST3). The first threshold TH1 is equivalent to the resistance value of the shape memory alloy wire 4 when its length becomes a predetermined first length. It should be noted that the first length is typically longer than the length of the shape memory alloy wire 4 in a straight state when it is supplied with a measuring current.

[0046] Specifically, such as Figure 4 As shown in the figure below, the middle portion 4M of the shape memory alloy wire 4 is pulled downwards by the operating member 1 pressed downwards by the operator of the input device 100, causing the shape memory alloy wire 4 to stretch. When the length of the shape memory alloy wire 4 reaches a first length, the resistance value R exceeds a first threshold TH1. At this time, the shape memory alloy wire 4 typically... Figure 4 As shown in the image below, it bends into a roughly V-shape when viewed from the side. More specifically, the middle portion 4M of the shape memory alloy wire 4... Figure 4 As shown in the diagram below, it becomes the same as Figure 4 Compared to the state shown in the diagram above, the state has shifted downwards by a distance DS1. Additionally, the inner fixing part 2C of the support member 2, which is fixed to the lower surface of the second lower protrusion 1Q of the operating member 1, is as follows... Figure 4 As shown in the diagram below, it becomes the same as Figure 4 Compared to the state shown in the diagram above, the state has shifted downwards by a distance DS2. Therefore, the support member 2 generates a force (restoring force) that attempts to push the operating member 1 back upwards.

[0047] If the resistance value R is determined not to exceed the first threshold TH1 (No in step ST3), the control device 10 continues to monitor the resistance value R. On the other hand, if the resistance value R is determined to exceed the first threshold TH1 (Yes in step ST3), the control device 10 supplies a first shrinkage current to the shape memory alloy wire 4 (step ST4). The first shrinkage current is the current supplied to shrink the shape memory alloy wire 4, and is greater than the measurement current.

[0048] When a first contraction current is supplied, the shape memory alloy wire 4, which is bent into an approximately V-shape, contracts and attempts to return to its stretched straight state. Therefore, the operator who presses the operating member 1 can experience an upward force F2 based on the shape memory alloy wire 4 and feel the force.

[0049] Then, the control device 10 measures the resistance value R of the shape memory alloy wire 4 (step ST5). That is, the control device 10 repeatedly obtains the resistance value R of the shape memory alloy wire 4, which is at a higher temperature due to being supplied with the first shrinkage current than when supplied with the measuring current, at a predetermined sampling period.

[0050] Next, the control device 10 determines whether the resistance value R exceeds the second threshold TH2 (step ST3). The second threshold TH2 is typically a value larger than the first threshold TH1, and is equivalent to the resistance value of the shape memory alloy wire 4 when its length becomes a predetermined second length under the condition of being supplied with the first contraction current. It should be noted that the second length is typically longer than the first length.

[0051] Specifically, the middle portion 4M of the shape memory alloy wire 4 is further pulled downward by the operating member 1, which is pressed further downward by the operator of the input device 100, causing the shape memory alloy wire 4 to stretch further. When the length of the shape memory alloy wire 4 reaches a second length, the resistance value R exceeds the second threshold TH2. At this time, the shape memory alloy wire 4 typically appears bent into an approximately V-shape when viewed from the side.

[0052] If the resistance value R is determined not to exceed the second threshold TH2 (No in step ST6), the control device 10 continues to monitor the resistance value R. On the other hand, if the resistance value R is determined to exceed the second threshold TH2 (Yes in step ST6), the control device 10 supplies a second shrinkage current to the shape memory alloy wire 4 (step ST7). The second shrinkage current is the current supplied to further shrink the shape memory alloy wire 4, and is greater than the first shrinkage current.

[0053] When a second contraction current is supplied, the shape memory alloy wire 4 attempts to recover from its stretched straight state with a stronger contraction than when the first contraction current is supplied. Therefore, the operator pressing the operating member 1 experiences a stronger upward force than when the first contraction current is supplied, and can feel a force different from the force felt when the first contraction current is supplied.

[0054] Thus, the control device 10 can impart a force sensation to the operator pressing the operating member 1 by increasing the current supplied to the shape memory alloy wire 4 when the resistance value R of the shape memory alloy wire 4 exceeds a predetermined value. Specifically, the control device 10 can impart a predetermined force sensation to the operator when the operator presses the operating member 1 a predetermined distance along the operating axis OA.

[0055] It should be noted that the control device 10 can also be configured to supply a measuring current to the shape memory alloy wire 4 when the resistance value R of the shape memory alloy wire 4 is lower than the third threshold TH3 (a value smaller than the first threshold TH1) while the first contraction current is supplied to the shape memory alloy wire 4. This is to be able to respond when the operator interrupts the pressing of the operating member 1.

[0056] Alternatively, the control device 10 can be configured to supply a first contraction current to the shape memory alloy wire 4 when the resistance value R of the shape memory alloy wire 4 is lower than a fourth threshold TH4 (a value that is larger than the first threshold TH1 and smaller than the second threshold TH2) while the second contraction current is supplied to the shape memory alloy wire 4. This is to be able to respond when the operator releases the force F1 of pressing the operating member 1.

[0057] Alternatively, steps ST2 to ST4 or steps ST5 to ST7 can be omitted. That is, the control device 10 can also be configured to provide the operator with one force sensation. Conversely, the control device 10 can also be configured to provide the operator with three or more force sensations.

[0058] Next, refer to Figure 5 as well as Figure 6 Another structural example of the force-sensing input device 100, namely the input device 100A, will be described. Figure 5 This is a diagram showing a structural example of the input device 100A. Specifically, Figure 5 The image above (the image above the block arrow) is an exploded perspective view of the input device 100A. Additionally, Figure 5 The following diagram (the diagram below the block arrow) is a schematic diagram of the force-feeding input system SYS, which consists of the control device 10, the power supply device 11, the resistance value detection device 12, and the input device 100A, and includes a perspective view of the input device 100A in its combined state.

[0059] Figure 6 This is a perspective sectional view of the input device 100A. Specifically, Figure 6 Observed from the Y2 side including Figure 5 The diagram below shows the cross-section of the input device 100A in an imaginary plane parallel to the XZ plane, represented by the dashed line L2.

[0060] exist Figure 5 as well as Figure 6 In the example shown, the input device 100A has an operating component 1, a base 3, a shape memory alloy wire 4, a conductive component 5, a moving component 6, and a spring component CS.

[0061] Operating component 1 is a component that bears the operating force based on the operator. In the example shown, operating component 1 is supported by shape memory alloy wire 4 so that it can move along operating axis OA, which is parallel to the first direction (Z-axis direction).

[0062] Specifically, the operating member 1 has an upper operating member 1U, a lower operating member 1D, and a fastening member 1C. The fastening member 1C is a screw used to fix the lower operating member 1D to the moving member 6. The upper operating member 1U can be fixed to the upper side of the lower operating member 1D fixed to the moving member 6 by means of adhesive or the like, and covers the fastening member 1C.

[0063] The base 3 is configured to support the operating member 1 so that it can move along a first direction and to support the moving member 6 so that it can move along a second direction (X-axis direction) perpendicular to the first direction. In the example shown, the base 3 is formed of synthetic resin and has a front base 3F and a rear base 3B. Furthermore, the base 3 has a cavity 3S for accommodating other members (the moving member 6) internally. Moreover, grooves 3G for guiding shape memory alloy wires 4 are formed on the side of the base 3. Specifically, a front groove 3GF is formed on the side of the front base 3F, and a rear groove 3GB is formed on the side of the rear base 3B.

[0064] The shape memory alloy wire 4 is an example of a shape memory actuator and constitutes a drive unit that drives the operating member 1 and the moving member 6. In the example shown, the shape memory alloy wire 4 heats up when current flows through it and contracts accordingly. The drive unit can apply force to the operating member 1 and the moving member 6 by utilizing the contraction of the shape memory alloy wire 4. In the example shown, the shape memory alloy wire 4 is a shape memory alloy wire having a left portion 4L disposed on the left side of the moving member 6, a front portion 4F disposed on the front side of the moving member 6, and a right portion 4R disposed on the right side of the moving member 6.

[0065] The conductive member 5 is a component for energizing the shape memory alloy wire 4 and is formed of a magnetic metal such as iron. In the example shown, the conductive member 5 has a metal member 50, a terminal member 51, and a fastening member 52. The fastening member 52 is a screw for fixing the metal member 50 and the terminal member 51 to the base 3. Specifically, the conductive member 5 has: a left conductive member 5L, which fixes one end (left end) of the shape memory alloy wire 4; and a right conductive member 5R, which fixes the other end (right end) of the shape memory alloy wire 4. Moreover, the left conductive member 5L has a left metal member 50L, a left terminal member 51L, and a left fastening member 52L, and the right conductive member 5R has a right metal member 50R, a right terminal member 51R, and a right fastening member 52R. The left metal member 50L and the left terminal member 51L are embedded in the recess 3R formed on the left side of the rear base 3B with the rear end of the left portion 4L of the shape memory alloy wire 4 sandwiched in the middle. Figure 5(The middle part is not visible) and is fixed to the left side of the rear base 3B by the left fastening member 52L. In addition, the right metal member 50R and the right terminal member 51R are embedded in the recess 3R formed on the right side of the rear base 3B with the rear end of the right part 4R of the shape memory alloy wire 4 sandwiched in the middle, and are fixed to the right side of the rear base 3B by the right fastening member 52R.

[0066] The movable member 6 is a member configured to move according to the movement of the operating member 1. In the example shown, the movable member 6 is a member formed of synthetic resin and is supported by the base 3 so that it can move along a second direction (X-axis direction) perpendicular to the first direction (Z-axis direction).

[0067] The spring member CS is configured to apply a force along a second direction (X-axis direction) to the moving member 6. In the example shown, the spring member CS is a compression coil spring. Specifically, the moving member 6 has a rear member 60, a central member 61, a front member 62, and a ring member 63, and the spring member CS has a front spring member CSF and a rear spring member CSB.

[0068] The rear member 60 has: a cylindrical portion 60C; a pair of lateral protrusions 60P that protrude left and right from the outer peripheral surface of the cylindrical portion 60C; and a generally cuboid upper protrusion 60Q that protrudes upward from the outer peripheral surface of the cylindrical portion 60C. A front cavity 60H1 for receiving the rear end of the central member 61 and a rear cavity 60H2 for receiving the rear spring member CSB are formed in the cylindrical portion 60C (see reference). Figure 6 ).

[0069] The central member 61 has a columnar portion 61P, a flange portion 61F, and a top portion 61T. Specifically, the columnar portion 61P has a front columnar portion 61P1 disposed on the front side of the flange portion 61F, and a rear columnar portion 61P2 disposed on the rear side of the flange portion 61F. Furthermore, the top portion 61T is configured to extend forward from the front end of the front columnar portion 61P1. In the example shown, the columnar portion 61P, the flange portion 61F, and the top portion 61T are all formed in a cylindrical manner. The diameter of the front columnar portion 61P1 is the same as the diameter of the rear columnar portion 61P2, the diameter of the flange portion 61F is larger than the diameters of both the front and rear columnar portions 61P1 and 61P2, and the diameter of the top portion 61T is smaller than the diameters of both the front and rear columnar portions 61P1 and 61P2.

[0070] The front member 62 has a cylindrical portion 62C and a pair of lateral protrusions 62P that protrude left and right from the outer peripheral surface of the cylindrical portion 62C. Specifically, the cylindrical portion 62C has a rear cylindrical portion 62C1 disposed on the rear side and a front cylindrical portion 62C2 disposed on the front side. In the example shown, the cylindrical portion 62C is formed in a cylindrical shape, and the diameter of the front cylindrical portion 62C2 is larger than the diameter of the rear cylindrical portion 62C1. Moreover, a rear cavity 62H1 is formed in the rear cylindrical portion 62C1 to receive the front columnar portion 61P1 of the central member 61 (see reference). Figure 6 A front cavity 62H2 for receiving ring member 63 is formed in the front cylindrical portion 62C2. In addition, grooves 62G for guiding shape memory alloy wire 4 are formed on the top surface of each of the pair of side protrusions 62P.

[0071] The ring member 63 is a member fixed to the top end 61T of the central member 61 within the front cavity 62H2 of the front member 62. In the example shown, the top end 61T is inserted through the ring member 63, and the ring member 63 and the top end 61T are fixed together by adhesive. It should be noted that the ring member 63 can also be screwed onto the top end 61T of the central member 61.

[0072] According to this structure, such as Figure 6 As shown, the front member 62 can slide rearward (X2 side) on the front columnar portion 61P1 of the central member 61 while compressing the front spring member CSF. On the other hand, the ring member 63 can prevent the front member 62 from falling forward (X1 side) from the front columnar portion 61P1 of the central member 61.

[0073] Furthermore, in the example shown, a cavity 3S (first cavity 3S1) is formed on the front side of the rear base 3B to receive the rear spring member CSB and the rear member 60. Specifically, the rear spring member CSB is configured to be disposed within the first cavity 3S1 between the inner bottom surface of the first cavity 3S1 and the inner bottom surface of the rear cavity 60H2, and is compressed to generate a restoring force when the rear member 60 moves rearward (X2 side) relative to the rear base 3B. Additionally, a cavity 3S (second cavity 3S2) is formed on the rear side of the front base 3F to receive the front spring member CSF, the central member 61, and the front member 62. That is, the front spring member CSF is configured to be disposed within the second cavity 3S2 between the flange portion 61F of the central member 61 and the front cylindrical portion 62C2 of the front member 62, and is compressed to generate a restoring force when the front member 62 moves rearward (X2 direction) relative to the central member 61. Additionally, a cavity 3S (third cavity 3S3) is formed on the front side of the front base 3F to receive the front member 62, the ring member 63, and the top end portion 61T of the central member 61. The front member 62 is configured to move rearward (X2 direction) within the third cavity 3S3 when the shape memory alloy wire 4 contracts. Specifically, a pair of notches 3C opening forward are formed on the front base 3F, and the front member 62 is mounted on the front base 3F by engaging a pair of side protrusions 62P with the pair of notches 3C.

[0074] Furthermore, a pair of windows 3W are formed on the side of the rear base 3B. The pair of windows 3W are configured as a pair of lateral protrusions 60P that protrude to the left and right from the outer peripheral surface of the cylindrical portion 60C of the rear member 60, and can move along a first direction (Z-axis direction). According to this structure, the rear member 60 can move within the rear base 3B along the first direction (Z-axis direction) without the lateral protrusions 60P contacting the rear base 3B, and the lateral protrusions 60P can hook the middle portion 4M of the shape memory alloy wire 4 within the window 3W and pull the shape memory alloy wire 4 downward.

[0075] Next, refer to Figure 7 as well as Figure 8 The operation of each component of the input device 100A when the operator presses the operating component 1 downward is explained. Figure 7 This is a right-side view of the input device 100A. Specifically, Figure 7 The image above is a right-side view of the input device 100A when the operating component 1 is not pressed in. Figure 7 The following figure is a right-side view of the input device 100A when the operating component 1 is pressed in. It should be noted that... Figure 7In order to clarify, the operating component 1 is marked with a dense pattern of intersecting lines, the shape memory alloy wire 4 is marked with a dense pattern of dots, the rear component 60 is marked with a grid pattern, the central component 61 is marked with a horizontal stripe pattern, and the front component 62 is marked with a sparse pattern of intersecting lines. Additionally, in Figure 7 In the diagram, for clarity, the force F1 of the operator who wants to press the operating component 1 downward is represented by a white block-shaped arrow.

[0076] Figure 8 This is a cross-sectional view of the input device 100A. Specifically, Figure 8 Observed from the Y2 side including Figure 5 The diagram below shows the cross-section of the input device 100A in an imaginary plane parallel to the XZ plane, defined by the dashed line L2. Figure 6 The corresponding sectional perspective view. More specifically, Figure 8 The above figure is a cross-sectional view of the input device 100A when the operating component 1 is not pressed in, and is consistent with... Figure 7 The image above corresponds to this. Additionally, Figure 8 The following figure is a cross-sectional view of the input device 100A when the operating member 1 is pressed in, and is consistent with... Figure 7 The image below corresponds to this. Additionally, in Figure 8 In the diagram below, for clarity, the front spring member CSF and the rear spring member CSB are omitted. Additionally, in Figure 8 In the diagram, for clarity, the force F1 of the operator who wants to press the operating component 1 downward is represented by a white block-shaped arrow.

[0077] like Figure 7 As shown in the figure below, when the operating member 1 is pressed down by the operator and moves downward a distance DS1, the rear member 60 of the movable member 6, which is fixed to the operating member 1, also moves downward together with the operating member 1. Specifically, as... Figure 8 As shown in the figure below, the rear member 60 slides downwards on the rear surface of the flange 61F of the central member 61. At this time, the central member 61 does not move downwards. This is because its downward movement is restricted by the front member 62. It should be noted that the downward movement of the front member 62 is restricted by the inner circumferential surface of the third cavity 3S3 of the front base 3F. As a result, as... Figure 8 As shown in the figure below, the gap GP1 between the inner circumferential surface of the first cavity 3S1 of the rear base 3B and the upper end of the outer circumferential surface of the cylindrical portion 60C of the rear member 60 increases; conversely, the gap GP2 between the inner circumferential surface of the front cavity 60H1 of the cylindrical portion 60C and the upper end of the outer circumferential surface of the rear columnar portion 61P2 of the central member 61 decreases. Therefore, as Figure 7As shown in the figure below, the side protrusion 60P, which protrudes to the right from the outer periphery of the cylindrical portion 60C of the rear member 60, hooks the middle portion 4M of the right side portion 4R of the shape memory alloy wire 4 inside the window portion 3W formed on the side of the rear base 3B, and pulls it downward by a distance DS2, deforming the middle portion 4M into a V-shape within the window portion 3W. It should be noted that the middle portion 4M is the portion located between the rear end and the front end (the portion connected to the front portion 4F) of the right side portion 4R of the shape memory alloy wire 4. Regarding the left side portion 4L of the shape memory alloy wire 4 (in... Figure 7 (The middle part is invisible), and the same applies.

[0078] When the middle portion 4M is pulled downward by a distance DS2, the front portion 4F moves backward by a distance DS3. Therefore, the front member 62 is pulled backward (X2 side) by the front portion 4F of the shape memory alloy wire 4 and moves backward. Furthermore, when the front member 62 moves backward, the front spring member CSF (refer to...) Figure 8 The rear surface of the front cylindrical portion 62C2 of the front member 62 is compressed between the front surface of the flange portion 61F of the central member 61. In addition, the central member 61 is pressed rearward by the front spring member CSF and moves rearward, while the rear member 60 is pressed rearward by the central member 61 and moves rearward a distance DS4 between the rear member 60 and the rear base 3B, while compressing the rear spring member CSB.

[0079] Additionally, the control device 10 can also supply a first contraction current to the shape memory alloy wire 4 when the operating member 1 moves downward by a distance DS1. When the first contraction current is supplied, the shape memory alloy wire 4 contracts, and similarly as when the middle portion 4M is pulled downward, the front portion 4F is moved backward. Therefore, similar to when the middle portion 4M is pulled downward, the spring member CS (front spring member CSF and rear spring member CSB) is compressed, and the moving member 6 (front member 62, central member 61 and rear member 60) moves backward.

[0080] That is, similar to the case of input device 100, in input device 100A, when a first contraction current is supplied, the middle portion 4M, which is bent into an approximately V-shape, contracts and attempts to return to its original state. Figure 7The shape memory alloy wire 4 is stretched into a straight line as shown in the diagram above. Therefore, when the operator presses the operating member 1, they experience an upward force based on the shape memory alloy wire 4 and can feel the force. Furthermore, in the input device 100A, when a first contraction current is supplied, the middle portion 4M, which is bent into an approximately V-shape, contracts and attempts to return to its stretched straight line state. Therefore, the front portion 4F is pulled backward. Thus, the operator pressing the operating member 1 experiences a backward force based on the shape memory alloy wire 4 and can feel the force. It should be noted that in the input device 100A, the moving direction (X-axis direction) of the moving member 6 is the same as the contraction direction (X-axis direction) of the shape memory alloy wire 4. Therefore, the movement distance of the rear member 60 (operating member 1) of the moving member 6 in the X-axis direction due to the contraction of the shape memory alloy wire 4 is greater than the movement distance of the rear member 60 (operating member 1) of the moving member 6 in the Z-axis direction due to the contraction of the shape memory alloy wire 4. Therefore, the operator who presses the operating member 1 of the input device 100A can feel a stronger force than in the case of the input device 100.

[0081] Similarly, in input device 100A, the control device 10 increases the current supplied to the shape memory alloy wire 4 when the resistance value R of the shape memory alloy wire 4 exceeds a predetermined value, thereby enabling the operator to perceive force when pressing the operating member 1. Specifically, the control device 10 can impart a predetermined force to the operator when the operator presses the operating member 1 a predetermined distance along the operating axis OA.

[0082] Next, refer to Figure 9 Another structural example of the force-sensing input device 100, namely input device 100B, will be described. Figure 9 This is a diagram showing an example of the structure of the input device 100B. Specifically, Figure 9 The image above (the image above the block arrow) is an exploded perspective view of the input device 100B. Additionally, Figure 9 The following diagram (the diagram below the block arrow) is a schematic diagram of a force-feeding input system SYS consisting of a control device 10, a power supply device 11, a resistance value detection device 12, and an input device 100B, and includes a perspective view of the input device 100B in its combined state.

[0083] exist Figure 9 In the example shown, the input device 100B has an operating component 1, a support component 2, a base 3, a shape memory alloy wire 4, a conductive component 5, and a cover component 7.

[0084] Operating member 1 is a member subjected to operating force based on the operator. In the example shown, operating member 1 is formed of synthetic resin and is supported by support member 2 so that it can move along operating axis OA parallel to the first direction (Z-axis direction).

[0085] In the input device 100B, the operating member 1 has: a generally rectangular parallelepiped main body 1M; a generally cylindrical pedestal 1N that protrudes upward from the center of the upper surface of the main body 1M; and a generally cylindrical upper protrusion 1B that protrudes upward from the center of the upper surface of the pedestal 1N. Furthermore, a through hole 1H for guiding the shape memory alloy wire 4 is provided in the main body 1M such that it passes through the main body 1M along the X-axis direction. Specifically, the through hole 1H has: an upper through hole 1HU; and a lower through hole 1HD, which is located lower than the upper through hole 1HU.

[0086] The support member 2 is configured to be disposed between the operating member 1 and the base 3 and to elastically support the operating member 1. In the example shown, the support member 2 is a leaf spring made of a non-magnetic material and has an inner fixing part 2C, an outer fixing part 2E, and four elastic arms 2G. The inner fixing part 2C is the part fixed to the operating member 1, the outer fixing part 2E is the part fixed to the base 3, and the four elastic arms 2G are the parts that connect the inner fixing part 2C and the outer fixing part 2E and are elastically deformable.

[0087] The base 3 is a component that supports the support member 2. In the example shown, the base 3 is formed of synthetic resin and has a generally rectangular shape. Specifically, the base 3 is a lidless box-shaped component with an outer peripheral wall portion 3A and a base plate portion 3T. Inside the outer peripheral wall portion 3A, there is a pedestal portion 3D that is generally rectangular in shape when viewed from above, and a recess 3R for receiving the conductive member 5. Furthermore, inside the generally rectangular annular pedestal portion 3D, there is a cavity portion 3S for receiving the operating member 1. The outer fixing portion 2E of the support member 2 is fixed to the base 3 by adhesive or the like while it is placed on the pedestal portion 3D.

[0088] The shape memory alloy wire 4 is an example of a shape memory actuator and constitutes a drive unit that drives the operating member 1. In the example shown, the shape memory alloy wire 4 heats up when current flows through it and contracts accordingly. The drive unit can apply force to the operating member 1 by utilizing the contraction of the shape memory alloy wire 4.

[0089] Specifically, the shape memory alloy wire 4 has: an upper wire 4U, which is inserted into the upper through hole 1HU of the operating member 1; and a lower wire 4D, which is inserted into the lower through hole 1HD of the operating member 1. In addition, the shape memory alloy wire 4 is arranged in such a way that it can move up and down within a pair of slits 3SL formed in the wall of the pedestal portion 3D of the base 3.

[0090] The conductive member 5 is a component for energizing the shape memory alloy wire 4 and is formed of a magnetic metal such as iron. In the example shown, the conductive member 5 has a metal member 50, a terminal member 51, and a fastening member 52. Specifically, the conductive member 5 has: an upper front conductive member 5UF, which fixes one end (front end) of the upper wire 4U; an upper rear conductive member 5UB, which fixes the other end (rear end) of the upper wire 4U; a lower front conductive member 5DF, which fixes one end (front end) of the lower wire 4D; and a lower rear conductive member 5DB, which fixes the other end (rear end) of the lower wire 4D. Moreover, the upper front conductive member 5UF has an upper front metal member 50UF, an upper front terminal member 51UF, and an upper front fastening member 52UF, and the upper rear conductive member 5UB has an upper rear metal member 50UB, an upper rear terminal member 51UB, and an upper rear fastening member 52UB. Similarly, the lower front conductive member 5DF has a lower front metal member 50DF, a lower front terminal member 51DF, and a lower front fastening member 52DF, and the lower rear conductive member 5DB has a lower rear metal member 50DB, a lower rear terminal member 51DB, and a lower rear fastening member 52DB. The upper front metal member 50UF and the upper front terminal member 51UF are embedded in the upper front recess 3RUF formed on the upper front side of the base 3, with the front end portion of the upper wire 4U sandwiched in between, and are fixed to the upper front side of the base 3 by the upper front fastening member 52UF. In addition, the upper rear metal member 50UB and the upper rear terminal member 51UB are embedded in the upper rear recess 3RUB formed on the upper rear side of the base 3, with the rear end portion of the upper wire 4U sandwiched in between, and are fixed to the upper rear side of the base 3 by the upper rear fastening member 52UB. Similarly, the lower front metal member 50DF and the lower front terminal member 51DF are embedded in the lower front recess 3RDF formed on the lower front side of the base 3, with the front end portion of the lower side line 4D sandwiched in the middle, and are fixed to the lower front side of the base 3 by the lower front fastening member 52DF. Additionally, the lower rear metal member 50DB and the lower rear terminal member 51DB are embedded in the lower rear recess 3RDB formed on the lower rear side of the base 3, with the rear end portion of the lower side line 4D sandwiched in the middle. Figure 9 (The middle part is not visible), and is fixed to the lower rear part of the base 3 by the lower rear fastening member 52DB.

[0091] The cover member 7 is a member configured to cover the upper surface of the base 3. In the example shown, the cover member 7 is a plate-shaped metal member, and a circular opening 7K for the upper protrusion 1B of the operating member 1 to pass through is formed in the central portion. Furthermore, through holes 7H are formed at the right front corner and left rear corner of the cover member 7. A generally cylindrical protrusion 3P, protruding upward from the upper surface of the base 3, is inserted into the through hole 7H. The base 3 and the cover member 7 are joined, for example, by riveting the protrusion 3P inserted into the through hole 7H. However, the joining of the base 3 and the cover member 7 can also be achieved by applying adhesive to the protrusion 3P inserted into the through hole 7H.

[0092] Next, refer to Figure 10 The operation of each component of the input device 100B when the operator presses the operating component 1 downwards is explained. Figure 10 This is a cross-sectional view of the input device 100B. Specifically, Figure 10 Observed from the Y2 side including Figure 9 The diagram below shows a cross-section of the input device 100B in an imaginary plane parallel to the XZ plane, defined by the dashed line L3. More specifically, Figure 10 The above figure is a cross-sectional view of the input device 100B when the operating component 1 is not pressed in. Figure 10 The central view is a cross-sectional view of the input device 100B when the operating component 1 is pressed in. Figure 10 The following figure is a cross-sectional view of the input device 100B when the operating member 1 is further pressed in. It should be noted that... Figure 10 In the diagram, for clarity, the forces F1 and F3 of the operator that want to press the operating component 1 downward are represented by white block arrows, while the forces F2 and F4 based on the shape memory alloy wire 4 that want to move the operating component 1 in the up and down direction are represented by black block arrows.

[0093] like Figure 10 As shown in the central diagram, when the operating member 1 is pressed in by the operator's force F1 and moves downward a distance DS1, the upper side line 4U is pulled downward and stretched by the downward-moving operating member 1. This is because the two ends (front and rear ends) of the upper side line 4U are... Figure 10 As shown in the diagram above, the operating member 1, in its unpressed state, is positioned higher than the middle portion 4UM located between the front and rear ends. As the middle portion 4UM moves downwards, the difference in height between the middle portion 4UM and the respective heights of the front and rear ends increases. On the other hand, the stretching of the lower side line 4D is mitigated when the operating member 1 moves downwards. This is because the two ends (front and rear ends) of the lower side line 4D... Figure 10As shown in the diagram above, when the operating component 1 is not pressed in, it is positioned lower than the middle portion 4DM located between the front and rear ends, and moves downward through the middle portion 4DM, reducing the height difference between the middle portion 4DM and the heights of the front and rear ends. It should be noted that, for clarity, in Figure 10 In the central diagram, dashed lines represent the positions of the lower side line 4D and the upper side line 4U when the operating component 1 is not pressed in. Figure 10 The same applies to the image below.

[0094] The control device 10 can also supply a first contraction current to the upper side line 4U when the operating member 1 has moved downward by a distance DS1. When the first contraction current is supplied, the upper side line 4U contracts and generates a force F2 that pushes the operating member 1 upward. Therefore, the operator who presses the operating member 1 is subjected to an upward force based on the upper side line 4U and can feel the force.

[0095] Afterwards, the control device 10 can also be as follows: Figure 10 As shown in the diagram below, when the operating member 1 is further pressed in and moves further downward by a distance DS2 under the force F3 of the operator, a second contraction current is supplied to the lower side line 4D. It should be noted that in the example shown, force F3 is the force used to further press the operating member 1 downward when the upper side line 4U is supplied with the first contraction current, and therefore is greater than force F1. In the example shown, the supply of the first contraction current to the upper side line 4U is stopped at this time. When the second contraction current is supplied, the lower side line 4D contracts, generating a force F4 that pulls the operating member 1 further downward. Therefore, the operating member 1 is subjected to a downward force based on the lower side line 4D, and the operator pressing the operating member 1 can feel a different force sensation than when subjected to an upward force based on the upper side line 4U. Specifically, the operator can feel that the force required to press in the operating member 1 suddenly decreases.

[0096] It should be noted that in the input device 100B, the control device 10 is configured to measure the resistance value of the upper side line 4U by flowing a measuring current through it, and to detect the position of the operating member 1 based on the measured resistance value. However, the control device 10 can also be configured to detect the position of the operating member 1 by measuring the resistance value of the lower side line 4D by flowing a measuring current through it. Furthermore, the control device 10 can also be configured to detect when the operating member 1 has moved downward a distance DS1 by measuring the resistance value of the upper side line 4U by flowing a measuring current through it, and to detect when the operating member 1 has moved downward a distance DS2 by measuring the resistance value of the lower side line 4D by flowing a measuring current through it. Alternatively, the control device 10 can be configured to detect the situation where the operating member 1 has moved downward a distance DS1 by measuring the resistance value of the lower line 4D by causing the measuring current to flow in the lower line 4D, and to detect the situation where the operating member 1 has moved downward a distance DS2 by measuring the resistance value of the upper line 4U by causing the measuring current to flow in the upper line 4U.

[0097] As described above, the input device 100 of one embodiment of the present invention is a force-feeding input device, and as... Figure 1 As shown, it comprises: a base 3; an operating member 1 supported for movement relative to the base 3 in a first direction (Z-axis direction, vertical direction); a shape memory alloy wire 4 whose length changes under the action of the operating member 1 moving towards one side (Z2 side, lower side) in the first direction (Z-axis direction); and a control device 10 electrically connected to the shape memory alloy wire 4, and which reaches a first position when the operating member 1 moves towards one side (Z2 side). Figure 4 When the shape memory alloy wire 4 is in the position shown in the figure below, the length of the shape memory alloy wire 4 is changed by changing the current flowing through it. Moreover, the control device 10 is configured to measure the resistance value R of the shape memory alloy wire 4 by making a measuring current flow through it, and to detect the position of the operating member 1 based on the resistance value R.

[0098] In this structure, the shape memory alloy wire 4 functions not only as a drive unit for driving the operating member 1, but also as a position detection unit for detecting the position of the operating member 1 in the first direction (Z-axis direction). Because the control device 10 can identify the length of the shape memory alloy wire 4 by measuring its resistance value R, and by identifying the length of the shape memory alloy wire 4, it can identify the position of the operating member 1 in the first direction (Z-axis direction). Therefore, this structure eliminates the need for a separate position sensor functioning as a position detection unit to detect the position of the operating member 1 in the first direction (Z-axis direction), thus simplifying the structure of the input device 100. In other words, this structure can determine whether the operating member 1 has been pressed in without using, for example, a position sensor.

[0099] Additionally, the control device 10 can also be used when the operating member 1 reaches the first position ( Figure 4 When the current flowing through the shape memory alloy wire 4 changes intermittently (as shown in the figure below), the shape memory alloy wire 4 contracts intermittently.

[0100] This structure, for example, can give the operator a sensation as if the operating member 1 is vibrating when it is pressed in to a predetermined distance. That is, this structure makes it easy for the operator to realize that the operating member 1 has been pressed in to a predetermined distance.

[0101] Additionally, the control device 10 can also be in the operating member 1 at a position other than the first position ( Figure 4 When the shape memory alloy wire 4 moves further to one side (Z2 side, lower side) to reach the second position, the current flowing in the shape memory alloy wire 4 changes, causing the shape memory alloy wire 4 to contract.

[0102] This structure, for example, can impart a different force sensation to the operator when the operating member 1 is pressed into the second position in the first direction (Z-axis direction) compared to the force sensation experienced by the operator when the operating member 1 is pressed into the first position. Therefore, the operator can easily distinguish between the case where the operating member 1 is pressed into the first position and the case where the operating member 1 is pressed into the second position.

[0103] In addition, such as Figure 5 as well as Figure 6 As shown, another structural example of the input device 100, namely the input device 100A, may include a movable member 6 supported so as to be movable relative to the base 3 along a second direction (X-axis direction, front-back direction) intersecting the first direction (Z-axis direction, vertical direction). In this case, as... Figure 8 As shown in the figure below, the operating member 1 can also be supported so that it can move relative to the moving member 6 (central member 61) in the first direction (Z-axis direction). Additionally, as... Figure 7As shown in the figure below, the shape memory alloy wire 4 can also be configured such that the first part (the rear end of the right side portion 4R) is mounted on the base 3 (rear base 3B) and the second part (the front end of the right side portion 4R, the front portion 4F) is mounted on the moving member 6 (front member 62), and the moving member 6 moves to one side (X2 side, rear side) in the second direction (X-axis direction) by contraction. Additionally, as... Figure 7 As shown in the figure below, the operating member 1, which moves towards one side (Z2 side) in the first direction (Z-axis direction), can also be configured to contact the middle portion 4M between the first part (rear end of the right side portion 4R) and the second part (front end of the right side portion 4R) of the shape memory alloy wire 4, thereby pulling and elongating the shape memory alloy wire 4. In the example shown, the operating member 1 is configured to allow the rear member 60 constituting the moving member 6 to move downward together with the operating member 1. Moreover, the rear member 60 is configured to hook the middle portion 4M of the shape memory alloy wire 4 using a pair of lateral protrusions 60P, and pull the middle portion 4M downward as the rear member 60 moves downward.

[0104] This structure allows the force exerted by the operating member 1 pulling the middle portion 4M of the shape memory alloy wire 4 downwards to be converted into a force that moves the moving member 6 backwards. Therefore, this structure provides the operator with a different force sensation compared to a structure without the moving member 6. Furthermore, this structure typically provides the operator with a stronger force sensation than a structure without the moving member 6. This is because, if the amount of contraction of the shape memory alloy wire 4 is the same, the movement distance of the moving member 6 in the X-axis direction is typically greater than the movement distance of the operating member 1 in the Z-axis direction.

[0105] In addition, such as Figure 9 As shown, the shape memory alloy wire 4 may also include a first shape memory alloy wire (upper wire 4U) and a second shape memory alloy wire (lower wire 4D).

[0106] This structure provides an effect that allows the operator to experience a different force sensation compared to that obtained using a single shape memory alloy wire 4. For example, this structure can provide the operator with a stronger force sensation than that obtained using a single shape memory alloy wire 4. It should be noted that the shape memory alloy wire 4 can also be composed of three or more shape memory alloy wires.

[0107] Alternatively, the control device 10 may be configured such that the operating member 1, which moves toward one side (Z2 side, lower side), reaches a first position. Figure 10When the current flowing through the first shape memory alloy wire (upper wire 4U) changes at the position shown in the central diagram, the first shape memory alloy wire (upper wire 4U) contracts, and the operating member 1, which moves further to one side (Z2 side, lower side), reaches the second position. Figure 10 When the position shown in the figure below is reached, the change in the current flowing through the second shape memory alloy wire (lower side wire 4D) causes the second shape memory alloy wire (lower side wire 4D) to contract.

[0108] This structure results in a force sensation that differs between when the operating member 1 reaches the first position and when it reaches the second position. Therefore, this structure, for example, enables a camera configured such that the operator can easily distinguish between the half-press and fully-press states of the shutter button (in an example application of input device 100).

[0109] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Various modifications or substitutions can be applied to the above embodiments without departing from the scope of the present invention. In addition, the features described with reference to the above embodiments can be appropriately combined as long as they are not technically contradictory.

[0110] For example, in reference Figure 9 In the input device 100B described herein, the control device 10 may also be configured to alternately change the current flowing in the first shape memory alloy wire (upper wire 4U) and the current flowing in the second shape memory alloy wire (lower wire 4D) when the operating member 1 moves downward a distance DS2 to reach the second position.

[0111] This application claims priority based on Japanese Patent Application No. 2023-121649, filed on July 26, 2023, the entire contents of which are incorporated herein by reference.

[0112] Explanation of reference numerals in the attached figures

[0113] 1: Operating component 1B: Upper protrusion 1C: Fastening component 1D: Lower operating component 1G: Groove 1H: Through hole 1HD: Lower through hole 1HU: Upper through hole 1M: Main body 1N: Base 1P: First lower protrusion 1Q: Second lower protrusion 1R: Third lower protrusion 1U: Upper operating component 1T: Flat plate 2: Support component 2C: Inner fixing part 2E: Outer fixing part 2G: Elastic arm 2H: Through hole 3: Base 3A: Outer peripheral wall 3B: Rear base 3C: Notch 3D: Base 3F: Front base 3G: Groove 3GB: Rear groove 3GF: Front groove 3H1: Through hole 3H2: Non-through hole 3P: Protrusion 3R 3RDB: Lower rear recess; 3RDF: Lower front recess; 3RUB: Upper rear recess; 3RUF: Upper front recess; 3S: Hollow portion; 3S1: First hollow portion; 3S2: Second hollow portion; 3S3: Third hollow portion; 3SL: Slit; 3T: Base plate portion; 3W: Window portion; 4: Shape memory alloy wire; 4D: Lower side wire; 4F: Front portion; 4L: Left side portion; 4M: Middle portion; 4R: Right side portion; 4U: Upper side wire; 5: Conductive member; 5B: Rear conductive member; 5DB: Lower rear conductive member; 5DF: Lower front conductive member; 5E: Top portion; 5F: Front conductive member; 5L: Left conductive member; 5R: Right conductive member; 5T: Terminal portion; 5UB: Upper... Rear conductive component 5UF: Upper front conductive component 6: Moving component 7: Cover component 7H: Through hole 7K: Opening 10: Control device 11: Power supply device 12: Resistance detection device 50: Metal component 50DB: Lower rear metal component 50DF: Lower front metal component 50L: Left metal component 50R: Right metal component 50UB: Upper rear metal component 50UF: Upper front metal component 51: Terminal component 51DB: Lower rear terminal component 51DF: Lower front terminal component 51L: Left terminal component 51R: Right terminal component 51UB: Upper rear terminal component 51UF: Upper front terminal component 52: Fastening component 52D B: Lower rear fastening member 52DF: Lower front fastening member 52L: Left fastening member 52R: Right fastening member 52UB: Upper rear fastening member 52UF: Upper front fastening member 60: Rear member 60C: Cylindrical part 60H1: Front cavity 60H2: Rear cavity 60P: Lateral protrusion 60Q: Upper protrusion 61: Central member 61F: Flange 61P: Columnar part 61P1: Front columnar part 61P2: Rear columnar part 61T: Top part 62: Front member 62C: Cylindrical part 62C1: Rear cylindrical part 62C2: Front cylindrical part 62G: Groove 62H1: Rear cavity 62H2: Front cavity62P: Lateral protrusion; 63: Ring member; 100, 100A, 100B: Input device; CS: Spring member; CSB: Rear spring member; CSF: Front spring member; SYS: Force-feeding input system.

Claims

1. A force-sensing input device, comprising: abutment; An operating component, which is supported to be movable relative to the base in a first direction; A shape memory alloy wire, the length of which changes as the operating member moves toward one side in the first direction; and A control device, electrically connected to the shape memory alloy wire, causes a change in the current flowing through the shape memory alloy wire, thereby changing the length of the shape memory alloy wire, when the operating member, which has moved to one side, reaches a first position. The force-feeding input device is characterized in that... The control device causes a measuring current to flow through the shape memory alloy wire to measure the resistance value of the shape memory alloy wire, and detects the position of the operating member based on the resistance value.

2. The force-feeding input device according to claim 1, wherein, The control device causes the current flowing through the shape memory alloy wire to change intermittently when the operating member reaches the first position, thereby causing the shape memory alloy wire to contract intermittently.

3. The force-feeding input device according to claim 1, wherein, When the operating member moves further to a second position than the first position, the control device causes a change in the current flowing through the shape memory alloy wire, thereby changing the length of the shape memory alloy wire.

4. The force-feeding input device according to claim 1, wherein, The force-feeding input device includes a movable member supported so as to be movable relative to the base in a second direction intersecting the first direction. The operating member is supported so that it can move relative to the moving member along the first direction. A first portion of the shape memory alloy wire is mounted on the base, and a second portion of the shape memory alloy wire is mounted on the movable member. The shape memory alloy wire is configured to cause the movable member to move towards one side of the second direction by contraction. The operating member, which moves toward one side in the first direction, contacts the middle portion between the first and second portions of the shape memory alloy wire, thereby pulling and elongating the shape memory alloy wire.

5. The force-feeding input device according to claim 1, wherein, The shape memory alloy wire includes a first shape memory alloy wire and a second shape memory alloy wire.

6. The force-feeding input device according to claim 5, wherein, When the operating member, which has moved to one side, reaches the first position, the control device causes a change in the current flowing in the first shape memory alloy wire to cause the first shape memory alloy wire to contract, and when the operating member, which has moved further to one side, reaches the second position, it causes a change in the current flowing in the second shape memory alloy wire to cause the second shape memory alloy wire to contract.

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