Patent Publication Number: US-11640882-B2

Title: Input device

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application is a divisional application of and claims the priority benefit of U.S. application Ser. No. 16/794,108, filed on Feb. 18, 2020, now allowed, which claims the priority benefits of U.S. provisional application Ser. No. 62/808,818, filed on Feb. 21, 2019, and China application serial no. 202010008614.X, filed on Jan. 6, 2020. The entirety of each of the above-mentioned patent applications is hereby incorporated by reference herein and made a part of this specification. 
    
    
     BACKGROUND 
     Technical Field 
     The disclosure relates to an input device capable of adjusting a sense of segmented movement during use. 
     Description of Related Art 
     With the development of science and technology, a computer becomes an indispensable electronic product used at work or home. In peripherals of the computer, an input device, such as a mouse, can make it easy for a user to slide a pointer and input an instruction. 
     However, different users have different habits of use. The sense of segmented movement provided by the wheel of a currently common input device comes from an electronic component encoder or is generated by using a mechanism. Generally, only a one-segment sense is provided, and the sense cannot be adjusted. 
     SUMMARY 
     The invention relates to an input device capable of adjusting a sense of segmented movement during use. 
     According to embodiments of the invention, the input device includes a holder, a first wheel, a slider, and a first pressure part. The first wheel is disposed on the holder, and includes a side surface, a circle center, and a segment adjusting structure. The segment adjusting structure is disposed on the side surface in a manner of surrounding the circle center. The slider is disposed on the holder, and is movable relative to the holder to move toward or away from the circle center. The first pressure part includes two first ends. One of the first ends is connected to the slider, and as the slider moves toward or away from the circle center, interference between the other of the first ends and the segment adjusting structure is increased or reduced. 
     Based on the above, because in the invention, the slider, the first pressure part, and the segment adjusting structure are disposed in the input device, a degree of interference between the first pressure part and the segment adjusting structure can be adjusted by moving the slider, thereby adjusting a scroll speed of the first wheel to meet a requirement of a user. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. The accompanying drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. 
         FIG.  1 A  and  FIG.  1 B  are schematic three-dimensional diagrams of an input device  100  according to Embodiment 1 of the invention; 
         FIG.  2 A  is a schematic three-dimensional diagram of an input device  200  according to Embodiment 2 of the invention; 
         FIG.  2 B  is a side view of  FIG.  2 A ; 
         FIG.  3 A  is a schematic three-dimensional diagram of an input device  300  according to Embodiment 3 of the invention; 
         FIG.  3 B  is a schematic breakdown view of the input device  300  in  FIG.  3 A ; 
         FIG.  4 A  is a schematic three-dimensional diagram of an input device  400  according to Embodiment 4 of the invention; 
         FIG.  4 B  is a schematic breakdown view of the input device  400  in  FIG.  4 A ; 
         FIG.  5 A  is a schematic three-dimensional diagram of an input device  500  according to Embodiment 5 of the invention; 
         FIG.  5 B  is a schematic breakdown view of the input device  500  in  FIG.  5 A ; 
         FIG.  6 A  is a schematic three-dimensional diagram of an input device  600  according to Embodiment 6 of the invention; and 
         FIG.  6 B  is a schematic breakdown view of the input device  600  in  FIG.  6 A . 
     
    
    
     DESCRIPTION OF THE EMBODIMENTS 
     Based on the above, the invention provides an input device, including a holder, a first wheel, a slider, and a first pressure part. The first wheel includes a side surface, a circle center, and a segment adjusting structure. The segment adjusting structure is disposed on the side surface in a manner of surrounding the circle center. The slider is disposed on the holder, and is movable relative to the holder to move toward or away from the circle center. The first pressure part includes two first ends. One of the first ends is connected to the slider, and as the slider moves toward or away from the circle center, interference between the other first end and the segment adjusting structure is increased or reduced. 
     Based on the above, when a user uses the input device, a force that needs to be applied to the first wheel to scroll the first wheel may be adjusted according to a habit of the user by changing a degree of interference between the first pressure part and the segment adjusting structure, and a scroll speed of the first wheel can also be adjusted. Some embodiments are provided as follows. The foregoing effects can be achieved by selecting different structures and combinations of components. 
     Referring to exemplary embodiments of the invention in detail, examples of the exemplary embodiments are described in the accompanying drawings. If possible, the same component symbols in the drawings and descriptions represent same or similar parts. In addition, for ease of description, a housing and a base of the input device are omitted in the drawings related to the following description. 
     Embodiment 1 
       FIG.  1 A  and  FIG.  1 B  are schematic three-dimensional diagrams of an input device  100  according to Embodiment 1 of the invention.  FIG.  1 A  and  FIG.  1 B  show different states of the input device  100 . Referring to  FIG.  1 A  and  FIG.  1 B  together, the input device  100  in the present embodiment includes a holder  110 , a first wheel  120 , a slider  130 , and a first pressure part  140 . 
     The holder  110  is secured on a base (not shown) of the input device  100 . The first wheel  120  is secured on the holder  110 , and includes a side surface  122 , a circle center  124 , and a segment adjusting structure  126 . The segment adjusting structure  126  is disposed on the side surface  122  in a manner of surrounding the circle center  124 , that is, the segment adjusting structure  126  is radially disposed on the side surface  122  by centering in the circle center  124 . The segment adjusting structure  126  has a shape feature that a thickness increases from an edge of the first wheel  120  toward the circle center  124 . In other words, in a radial direction of the first wheel  120  (that is, a direction from a periphery of the first wheel  120  toward the circle center  124 ), a cross section of the segment adjusting structure  126  is substantially a right-angled triangle. 
     The slider  130  is disposed on the holder  110 , and is movable relative to the holder  110  to move toward or away from the circle center  124  of the first wheel  120 . 
     The first pressure part  140  includes two first ends  142  and  144 . One of the first ends  142  is secured on the slider  130 , so that the first pressure part  140  may move toward or away from the circle center  124  as the slider  130  moves. Interference between the other first end  144  and the segment adjusting structure  126  is increased or reduced as the slider  130  moves, or even there is no contact between the other first end  144  and the segment adjusting structure  126 . In the present embodiment, the first pressure part  140  is a spring plate made of a metal. 
     The input device  100  further includes a knob  150  connected to the slider  130 , and the knob  150  in the present embodiment may be a second wheel. For the second wheel, it should be noted that there is a convex column below a circle center of the knob  150 . The convex column is engaged in a groove of the slider  130 . Therefore, when turned, the second wheel may drive the slider  130  to move. That is, when a user turns the second wheel counterclockwise, the second wheel may drive the slider  130  to move away from the first wheel  120 , so that the interference between the first end  144  of the first pressure part  140  and the segment adjusting structure  126  may be reduced or eliminated. When the user turns the second wheel clockwise, the second wheel may drive the slider  130  to move toward the first wheel  120 , so that the interference between the first end  144  of the first pressure part  140  and the segment adjusting structure  126  may be increased. 
     In the input device  100 , both the first wheel  120  and the second wheel both protrude from a housing (not shown) of the input device  100 , so that the user may turn the first wheel  120  and the second wheel with fingers. 
     When operating the input device  100 , the user turns the first wheel  120  with fingers to adjust a page of a document. When a scroll speed of the first wheel  120  does not meet an expectation of the user, for example, the first wheel  120  can be scrolled only when a relatively large force is applied, or the scroll speed of the first wheel  120  is higher than an expected speed, the user may adjust the scroll speed to a desired scroll speed of the first wheel  120  by changing a degree of interference between the first pressure part  140  and the segment adjusting structure  126 . 
     Specifically, the user turns the second wheel that is used as the knob  150  to enable the slider  130  moves toward or away from the first wheel  120 , so as to further changing the degree of interference between the first pressure part  140  and the segment adjusting structure  126 . Therefore, the scroll speed of the first wheel  120  may be changed. 
     In a first case, the second wheel is farther from the first wheel  120 , and the first pressure part  140  is not in contact with the segment adjusting structure  126 . In this case, the first pressure part  140  does not apply a force to the first wheel  120 , so that the first wheel  120  may quickly scroll without hindrance. 
     If the user believes that the input device  100  in the first case does not meet a use expectation, the input device  100  may be changed to a second case. Specifically, the user turns the second wheel, and drives the slider  130  to move toward the circle center  124  of the first wheel  120  relative to the holder  110 . As the slider  130  moves, the first pressure part  140  is driven to get in contact with the segment adjusting structure  126 . After the first pressure part  140  starts to get in contact with the segment adjusting structure  126 , the first pressure part  140  may apply pressure to the first wheel  120 . Therefore, scrolling of the first wheel  120  may be affected by the force that is applied by the first pressure part  140  to the first wheel  120 , so that the user needs to apply a larger force to the first wheel  120 . 
     In particular, a thickness of the segment adjusting structure  126  increases from the edge of the first wheel  120  toward the circle center  124 . Therefore, as the slider  130  gets closer to the circle center  124  of the first wheel  120 , the degree of interference of the first end  144  of the first pressure part  140  that is closer to the circle center  124  on the segment adjusting structure  126  is larger, and a force that is applied by the first pressure part  140  to the first wheel  120  is larger, so that the user needs a larger force to scroll the first wheel  120 . 
     On the contrary, when the first end  144  of the first pressure part  140  that is closer to the circle center  124  moves away from the circle center  124 , a force that is applied by the first pressure part  140  to the first wheel  120  becomes smaller, so that the user needs a smaller force to the scroll the first wheel  120 , and the scroll speed of the first wheel  120  becomes faster. 
     By the way, the segment adjusting structure  126  in the present embodiment is a discontinuous structure spaced apart at an interval in a circumferential direction. In this way, when the user scrolls the first wheel  120  with fingers, the first pressure part  140  gets in contact with each segment adjusting structure  126 , which may feed back to the user a segmented sense. In other implementations, the segment adjusting structure  126  may alternatively be designed as a continuous surface. When the user scrolls the first wheel  120 , the sense that is fed back may be provided by other mechanical components, or the sense may not be fed back to the user. 
     In addition, in other implementations, the knob  150  may alternatively be a button that is integrated with the slider  130  and that protrudes from the housing (not shown) of the input device  100 . Therefore, the user may linearly push the knob  150  to move the slider  130 . 
     Embodiment 2 
       FIG.  2 A  is a schematic three-dimensional diagram of an input device  200  according to Embodiment 2 of the invention, and  FIG.  2 B  is a side view of  FIG.  2 A . Referring to  FIG.  2 A  and  FIG.  2 B  together, the input device  200  in the present embodiment is substantially the same as the input device  100  in the first embodiment, and also includes a holder  210 , a first wheel  220 , a slider  230 , and a first pressure part  240 . The first wheel  220  includes a side surface  222 , a circle center  224 , and a segment adjusting structure  226 . The segment adjusting structure  226  is disposed on the side surface  222  in a manner of surrounding the circle center  224 . The slider  230  is disposed on the holder  210 , and is movable relative to the holder  210  to move toward or away from the circle center  224 . The first pressure part  240  includes two first ends (a front end  242  and a rear end  244 ). One of the first ends (the rear end  244 ) is connected to the slider  230 , and as the slider  230  moves toward or away from the circle center  224 , interference between the other first end (the front end  242 ) and the segment adjusting structure  226  is increased or reduced. 
     In addition, in the input device  200  of the present embodiment, a second gear is also selected as a knob  250  connected to the slider  230 . The setting and action manner of the knob  250  have been described in Embodiment 1. Therefore, details are not described again. 
     Different from Embodiment 1, the segment adjusting structure  226  in the present embodiment is a gear that is disposed on the side surface  222  of the first wheel  220 , and the first pressure part  240  includes a protrusion  240   a  and a spring  240   b.    
     Specifically, the slider  230  has an accommodating space S. The rear end  244  of the protrusion  240   a  is located in the accommodating space S. Two ends of the spring  240   b  respectively abut against a side wall of the accommodating space S and the rear end  244  of the protrusion  240   a . Therefore, the spring  240   b  provides an elastic force to enable the front end  242  of the protrusion  240   a  to protrude outside the accommodating space S, and the front end  242  of the protrusion  240   a  is configured to get in contact with the teeth of the gear that is used as the segment adjusting structure  226 . It should be noted that, the segment adjusting structure  226  (that is, the gear) in the present embodiment protrudes from the side surface  222  of the first wheel  220 , thereby enabling the front end  242  of the protrusion  240   a  to forwardly abut against the teeth of the gear. 
     Similarly, a user may turn a second gear that is used as the knob  250  to drive the slider  230  to move toward or away from the circle center  224  of the first wheel  220  relative to the holder  210 . 
     As the slider  230  moves toward the circle center  224  of the first wheel  220 , the front end  242  of the protrusion  240   a  may get in contact with the teeth of the gear that is used as the segment adjusting structure  226 . As the slider  230  gets closer to the circle center  224  of the first wheel  220 , interference between the front end  242  of the protrusion  240   a  and the teeth of the gear is greater, and a compression degree of the spring  240   b  that abuts against an end of the protrusion  240   a  becomes larger. A force that is applied by the spring  240   b  to the protrusion  240   a  becomes larger, so that a force by which the front end  242  of the protrusion  240   a  abuts against the teeth of the gear that is used as the segment adjusting structure  226  becomes larger. Therefore, a force by which the user operates the first wheel  220  also becomes larger, so as to provide the user with different degrees of the sense of segmented movement. In addition, the protrusion  240   a  may alternatively be completely not in contact with the segment adjusting structure  226  (that is, the gear). Therefore, the first wheel  220  may quickly rotate. 
     Embodiment 3 
       FIG.  3 A  is a schematic three-dimensional diagram of an input device  300  according to Embodiment 3 of the invention, and  FIG.  3 B  is a schematic breakdown view of the input device  300  in  FIG.  3 A . Referring to  FIG.  3 A  and  FIG.  3 B  together, components used in the input device  300  of the present embodiment are substantially the same as components used in the input devices  100  and  200  of Embodiment 1 and Embodiment 2. However, a setting architecture of the input device  300  in the present embodiment is different from setting architectures of the input devices  100  and  200  in Embodiment 1 and Embodiment 2. 
     Specifically, the input device  300  in the present embodiment also includes a holder  310 , a first wheel  320 , a slider  330 , and a first pressure part  340 . The first wheel  320  is secured on the holder  310  and includes a side surface  322 , a circle center  324 , and a segment adjusting structure  326 . The segment adjusting structure  326  is disposed on the side surface  322  in a manner of surrounding the circle center  324 . The slider  330  is disposed on the holder  310 , and is movable relative to the holder  310  to move toward or away from the circle center  324 . The first pressure part  340  is formed by bending a metal part, and includes two first ends  342  and  344 . One of the first ends  342  is connected to the slider  330 . Whether the other first end  344  is in contact with the first wheel  320  depends on a location of the slider  330  relative to the circle center  324 . 
     Different from the foregoing embodiments, the segment adjusting structure  326  in the present embodiment includes a first sub-segment structure  326   a  and a second sub-segment structure  326   b . The first sub-segment structure  326   a  and the second sub-segment structure  326   b  are disposed around the circle center  324 . The first sub-segment structure  326   a  is located between the circle center  324  and the second sub-segment structure  326   b , and a quantity of segments of the first sub-segment structure  326   a  is different from a quantity of segments of the second sub-segment structure  326   b.    
     Specifically, the first sub-segment structure  326   a  and the second sub-segment structure  326   b  include a plurality of segments protruding from the side surface  322  in an axial direction A of the first wheel  220 , and shapes of the segments are substantially conical. The segments of the first sub-segment structure  326   a  and the segments of the second sub-segment structure  326   b  have similar shapes, but different sizes. Therefore, the quantity of segments of the first sub-segment structure  326   a  is different from the quantity of segments of the second sub-segment structure  326   b.    
     Based on the above, in the axial direction A, heights of the segments of the first sub-segment structure  326   a  and the second sub-segment structure  326   b  are not limited, and may be the same or different. If the heights of the segments of the first sub-segment structure  326   a  are the same as the heights of the segments of the second sub-segment structure  326   b , and widths of the segments of the first sub-segment structure  326   a  in a circumferential direction are greater than widths of the segments of the second sub-segment structure  326   b  in a circumferential direction, gradients of the segments of the first sub-segment structure  326   a  from bottom to top are smaller than gradients of the segments of the second sub-segment structure  326   b  from bottom to top. 
     Therefore, if the first end  344  of the first pressure part  340  that is closer to the circle center  324  of the first wheel  320  abuts against the first sub-segment structure  326   a  or the second sub-segment structure  326   b , a scroll speed of the first wheel  320  may be affected. If the first end  344  of the first pressure part  340  abuts against the first sub-segment structure  326   a  or the second sub-segment structure  326   b , a force that is applied by the user may be affected by the heights of the segments. 
     Certainly, the first end  344  of the first pressure part  340  may alternatively not abut against the first sub-segment structure  326   a  or the second sub-segment structure  326   b.    
     By the way, the input device  300  further includes a knob  350 . The knob  350  may be connected to the slider  330  from below the slider  330 . Therefore, the knob  350  may be located below a base (not shown) of the input device  300 . 
     Embodiment 4 
       FIG.  4 A  is a schematic three-dimensional diagram of an input device  400  according to Embodiment 4 of the invention, and  FIG.  4 B  is a schematic breakdown view of the input device  400  in  FIG.  4 A . Referring to  FIG.  4 A  and  FIG.  4 B  together, similar to the input device  300  in Embodiment 3, the input device  400  in the present embodiment includes a holder  410 , a first wheel  420 , a slider  430 , and a first pressure part  440 . The first wheel  420  includes a side surface  422 , a circle center  424 , and a segment adjusting structure  426 . The segment adjusting structure  426  is disposed on the side surface  422  in a manner of surrounding the circle center  424 . The slider  430  is disposed on the holder  410 , and is movable relative to the holder  410  to move toward or away from the circle center  424 . The first pressure part  440  includes two first ends  442  and  444 . One of the first ends  442  is connected to the slider  430 , and as the slider  430  moves toward or away from the circle center  424 , interference between the other first end  444  and the segment adjusting structure  426  is increased or reduced. 
     Different from the foregoing embodiments, an implementation of the segment adjusting structure  426  is changed. 
     Specifically, in the present embodiment, a first sub-segment structure  426   a  and a second sub-segment structure  426   b  are ring gears spaced at a distance in a radial direction of the first wheel  420 . 
     Specifically, a groove R is formed on the side surface  422  of the first wheel  420 , and includes an internal ring gear that is closer to the circle center  424  and an external ring gear that is farther from the circle center  424  and located in an outer peripheral circle of the first wheel  420 . The internal ring gear is the first sub-segment structure  426   a , and the external ring gear is the second sub-segment structure  426   b.    
     The internal ring gear is different from the external ring gear. Therefore, when the first end  444  of the first pressure part  440  gets in contact with the internal ring gear or the external ring gear, a force that is applied by the first pressure part  440  to the first wheel  420  differs, thereby affecting a scroll speed of the first wheel  420 . 
     Specifically, the internal ring gear and the external ring gear include a plurality of teeth. An objective of changing a sense of segmented movement of the first wheel  420  of the input device  400  is achieved by making the teeth of the internal ring gear different from the teeth of the external ring gear. 
     That the teeth of the internal ring gear are different from the teeth of the external ring gear may be achieved by changing one factor selected from a tooth width, a tooth thickness, and a tooth height. Accordingly, a quantity of the teeth of the internal ring gear may be different from a quantity of the teeth of the external ring gear. For example, the internal ring gear and the external ring gear have a same tooth thickness and a same tooth height, but different tooth widths. Alternatively, the internal ring gear and the external ring gear have a same tooth width and a same tooth thickness, but different tooth heights. Alternatively, the internal ring gear and the external ring gear have same tooth widths and tooth heights, but different tooth thicknesses. This is designed according an actual requirement. 
     By using a difference between the internal ring gear and the external ring gear, the user enables, by moving the slider  430 , the first end  444  of the first pressure part  440  that is closer to the circle center  424  to get in contact with the first sub-segment structure  426   a  and the second sub-segment structure  426   b , or to not get in contact with the first sub-segment structure  426   a  and the second sub-segment structure  426   b , so that the first wheel  420  of the input device  400  may have three stages of a sense of segmented movement during operation (that is, not in contact with both the first sub-segment structure  426   a  and the second sub-segment structure  426   b , in contact with the first sub-segment structure  426   a , or in contact with the second sub-segment structure  426   b ). 
     Similarly, the input device  400  may further includes a knob  450 . A setting manner of the knob  450  may be the same as the knob  350  in Embodiment 3, or may be changed according to an actual requirement. 
     It can be learned from Embodiment 1 to Embodiment 4 that, the segment adjusting structure has a plurality of different implementations. A person skilled in the art may modify, according to actual requirements, an implementation form of the segment adjusting structure under the technical teaching provided in this specification, to achieve a same objective. 
     Embodiment 5 
       FIG.  5 A  is a schematic three-dimensional diagram of an input device  500  according to Embodiment 5 of the invention, and  FIG.  5 B  is a schematic breakdown view of the input device  500  in  FIG.  5 A . Referring to  FIG.  5 A  and  FIG.  5 B  together, similar to the foregoing embodiments, the input device  500  in the present embodiment includes a holder  510 , a first wheel  520 , a slider  530 , and a first pressure part  540 . The first wheel  520  includes a side surface  522 , a circle center  524 , and a segment adjusting structure  526 . The segment adjusting structure  526  is disposed on the side surface  522  in a manner of surrounding the circle center  524 . The slider  530  is disposed on the holder  510 , and is movable relative to the holder  510  to move toward or away from the circle center  524 . The first pressure part  540  includes two first ends  542  and  544 . One of the first ends  542  is connected to the slider  530 , and as the slider  530  moves toward or away from the circle center  524 , interference between the other first end  544  and the segment adjusting structure  526  is increased or reduced. 
     Different from the foregoing embodiments, Embodiment 1 to Embodiment 4 describe adjusting the scroll speed of the first wheel of the input device by using a change of the segment adjusting structure. In the present embodiment, a structure of the slider  530  is changed to affect a degree of interference between the first pressure part  540  and the segment adjusting structure  526 , to adjust the scroll speed of the first wheel  520  of the input device  500 . 
     Specifically, in the present embodiment, the segment adjusting structure  526  is a ring gear that is formed on the side surface  522  of the first wheel  520 . A structure of the ring gear is similar to the external ring gear that is used as the second sub-segment structure  426   b  in the Embodiment 4. The first pressure part  540  is pivotally disposed on the holder  510 , that is, the first pressure part  540  may rotate relative to the holder  510 . More specifically, a torsion spring may be selected as the first pressure part  540 . The slider  530  has a guiding structure  532 . The guiding structure  532  may be a guiding groove. The first end  542  of the first pressure part  540  that is connected to the slider  530  is inserted in the guiding groove. The first end  544  of the first pressure part  540  that is closer to the circle center  524  gets in contact with the segment adjusting structure  526 . 
     The guiding groove of the guiding structure  532  is stepped, and a step is formed upward from a bottom of the slider  530  that is farther from the circle center  524  to a direction that is closer to the circle center  524 . 
     When the slider  530  moves toward the circle center  524  of the first wheel  520 , the first end  542  inserted in the guiding groove may go deeper into the guiding groove as guided by the guiding groove, to enable the first pressure part  540  to rotate, so that a degree of interference between the first end  544  that is in contact with the segment adjusting structure  526  and the segment adjusting structure  526  is increased. In this case, a user needs to apply a larger force to scroll the first wheel  520 . 
     On the contrary, when the slider  530  moves reversely to move away from the circle center  524  of the first wheel  520 , as the first end  542  inserted in the guiding groove is guided by the guiding groove, the first pressure part  540  rotates to reduce a degree of interference between the first end  544  that is in contact with the segment adjusting structure  526  and the segment adjusting structure  526 . In this case, the user may use a smaller force to scroll the first wheel  520 . 
     Embodiment 6 
       FIG.  6 A  is a schematic three-dimensional diagram of an input device  600  according to Embodiment 6 of the invention, and  FIG.  6 B  is a schematic breakdown view of the input device  600  in  FIG.  6 A . Referring to  FIG.  6 A  and  FIG.  6 B  together, similar to the foregoing embodiments, the input device  600  in the present embodiment includes a holder  610 , a first wheel  620 , a slider  630 , and a first pressure part  640 . The first wheel  620  includes a side surface  622 , a circle center  624 , and a segment adjusting structure  626 . The segment adjusting structure  626  is disposed on the side surface  622  in a manner of surrounding the circle center  624 . The slider  630  is disposed on the holder  610 , and is movable relative to the holder  610  to move toward or away from the circle center  624 . The first pressure part  640  includes two first ends  642  and  644 . One of the first ends  642  is connected to the slider  630 , and as the slider  630  moves toward or away from the circle center  624 , interference between the other first end  644  and the segment adjusting structure  626  is increased or reduced. 
     Different from the foregoing embodiments, the input device  600  further includes a second pressure part  660  pivotally disposed on the holder  610 . The second pressure part  660  includes two second ends  662  and  664 . One of the second ends  662  is inserted into the guiding groove  632  of the slider  630 , and the other second end  664  of the second pressure part  660  is hooked with the first end  642  of the first pressure part  640  that is connected to the slider  630 . The first pressure part  640  and the second pressure part  660  are disposed on a positioning block  650  of the holder  610 . Either side of the positioning block  650  has a convex column, to enable the first pressure part  640  and the second pressure part  660  to be pivotally disposed on the positioning block  650 . 
     The guiding groove of the slider  630  is formed obliquely downward from a side of the slider  630  that is farther from the circle center  624  toward a side that is closer to the circle center  624 . In addition, the top of the slider  630  has a stepped guiding structure  634 . The first end  642  of the first pressure part  640  that is connected to the slider  630  is in contact with the guiding structure  634 . 
     When the slider  630  moves toward the circle center  624  of the first wheel  620 , the first end  642  that is in contact with the guiding structure  634  may be guided by the guiding structure  634  to enable the first pressure part  640  to rotate, so that the first end  644  that is in contact with the segment adjusting structure  626  may be slightly separated from the segment adjusting structure  626 . 
     In particular, as the second end  662  of the second pressure part  660  that is inserted in the guiding groove of the slider  630  is guided by the guiding groove  632  to enable the second pressure part  660  to rotate, the other second end  664  of the second pressure part  660 , that is, the second end  664  hooked with the first end  642  of the first pressure part  640  that is in contact with the guiding structure  634 , may press downward to the first end  642 , so that the first end  644  that is in contact with the segment adjusting structure  626  is continuously in contact with the segment adjusting structure  626 . 
     As the second end  662  inserted in the guiding groove  632  gets deeper into the guiding groove  632 , a force applied by the second end  664  that is hooked with the first pressure part  640  to the first pressure part  640  is larger. Therefore, the degree of interference between the first end  644  and the segment adjusting structure  626  is increased. 
     Similarly, in the present embodiment, a knob (not shown) may alternatively be set to change a location of the slider  630 . 
     In addition, a new implementation may be obtained by combining and changing the foregoing six embodiments according to an actual requirement. In addition, under the teachings of the foregoing embodiments, a person skilled in the art may alternatively achieve a same objective by selecting other components and by changing designs of structures or architectures. 
     In conclusion, in the input device in the invention, a slider, a pressure part, and a segment adjusting structure are disposed. Through cooperation of the slider, the pressure part, and the segment adjusting structure, a degree of interference between the pressure part and the segment adjusting structure may be changed by using simple actions (such as turning or scrolling), thereby further adjusting a force that the user needs to apply to a first wheel to scroll the first wheel and a scroll speed of the first wheel, so that user requirements can be satisfied. 
     Finally, it should be noted that the foregoing embodiments are merely used for describing the technical solutions of the invention, but are not intended to limit the invention. Although the invention is described in detail with reference to the foregoing embodiments, a person of ordinary skill in the art should understand that, modifications may still be made to the technical solutions in the foregoing embodiments, or equivalent replacements may be made to some or all of the technical features; and such modifications or replacements will not cause the essence of corresponding technical solutions to depart from the scope of the technical solutions in the embodiments of the invention.