Keyboard with adjustable hand feeling

Abstract

The utility model discloses a keyboard with adjustable hand feeling, which comprises a keyboard main body, and the keyboard main body comprises a bottom shell and a key assembly arranged above the bottom shell; the key assembly comprises a fixing plate, a circuit board and a plurality of keys, wherein the fixing plate and the circuit board are arranged up and down, and the keys are arranged on the fixing plate. An elastic arm is installed on the bottom shell, a first connecting point and a second connecting point which are arranged at an interval are defined in the extending length direction of the elastic arm, the portion, located between the first connecting point and the second connecting point, of the elastic arm serves as a cantilever part, the first connecting point is connected to the bottom shell, and the second connecting point is connected with the key assembly; an adjusting mechanism is arranged on the bottom shell and provided with a fulcrum capable of supporting the cantilever part, the fulcrum is located below the cantilever part, and the adjusting mechanism is arranged in a sliding mode in the extending length direction of the elastic arm so as to change the position, supported by the cantilever part, of the fulcrum, further change the distance between the second connecting point and the fulcrum, and achieve soft and hard switching of the whole keyboard. And high-individuation soft and hard hand feeling adjustment can be provided.

Description

Technical Field

[0001] This utility model relates to keyboards, and more particularly to a keyboard with adjustable tactile feedback. Background Technology

[0002] Different users have different preferences for the feel of a keyboard, and these preferences also vary depending on the usage scenario. For example, a firmer feel can improve reaction speed when gaming, while a softer feel can improve comfort when typing. Currently, existing technologies for adjusting the firmness of a keyboard mainly include adjustable switches for mechanical keyboards and special keyboard structures.

[0003] I. Regarding adjustable shaft technology, it allows users to adjust the stiffness of the shaft by rotating a wrench. This adjustment is achieved through an internal structural adjustment hole and the rotating wrench. However, the manufacturing cost of this type of adjustable shaft is relatively high, and the durability of the adjustment system may be affected after long-term use, resulting in higher maintenance costs.

[0004] Second, some keyboards employ a special sandwich structure, using different filling materials to adjust the tactile feel. For example, they may use elastic silicone, a sound-absorbing layer, or latex cotton as filling materials to achieve better noise reduction and a softer, more responsive feel. However, with this design, it's inconvenient for users to adjust the keyboard's stiffness themselves after purchasing the keyboard.

[0005] Third, some keyboards use airbag adjustment technology, which changes the feel of the keys by setting airbags inside the keyboard and adjusting the pressure inside the airbags through air pumps and control valves. This allows users to set the inflation volume of each airbag and the trigger value of the pressure sensor according to their personal typing habits, so that users can get a keyboard that matches their own feel. However, the manufacturing and maintenance costs of airbag adjustment technology are relatively high, making it difficult to promote and apply.

[0006] Therefore, a new technical solution needs to be researched to address the above problems. Utility Model Content

[0007] In view of this, the present invention addresses the deficiencies of the existing technology, and its main purpose is to provide a keyboard with adjustable feel. It connects the elastic arm between the bottom shell and the key assembly, and adjusts the support position of the fulcrum on the elastic arm through an adjustment mechanism to realize the switching between soft and hard feel of the entire keyboard. The adjustment is flexible and can realize multi-point adjustment. At the same time, the cost is controllable, the practicality is strong, and it is suitable for widespread application.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] An adjustable keyboard includes a keyboard body, the keyboard body including a bottom shell and a key assembly disposed on the top of the bottom shell; the key assembly includes a fixing plate disposed vertically, a circuit board, and a plurality of keys disposed on the fixing plate;

[0010] A spring arm is mounted on the bottom shell. The spring arm has a first connection point and a second connection point defined at intervals along its extension length. The spring arm has a cantilever section located between the first connection point and the second connection point. The first connection point is connected to the bottom shell, and the second connection point is connected to the button assembly.

[0011] An adjustment mechanism is provided on the bottom shell. The adjustment mechanism has a fulcrum that can support the cantilever. The fulcrum is located below the cantilever. The adjustment mechanism is slidably arranged along the extension length direction of the elastic arm to change the position of the fulcrum supporting the cantilever, thereby changing the distance between the second connection point and the fulcrum.

[0012] As a preferred embodiment, the adjustment mechanism includes a sliding plate and a sliding handle. The fulcrum is disposed on the sliding plate, and the sliding handle is connected to the sliding plate. By moving the sliding handle, the fulcrum on the sliding plate slides synchronously, and the position of the fulcrum supporting the cantilever changes.

[0013] As a preferred embodiment, the slider is exposed outside the keyboard body.

[0014] As a preferred embodiment, a support wheel is screwed onto the side folding plate of the sliding plate, and the peripheral side of the support wheel serves as a support contact surface for supporting the bottom of the cantilever.

[0015] As a preferred embodiment, the sliding plate has two parts, left and right, and each sliding plate is connected to a rack extending to the left and right. The sliding handle is connected to one of the racks, and a gear is meshed between the two racks. The gear is mounted on the bottom shell and can rotate horizontally around the Z-axis. When the sliding handle drives the rack connected to it to slide, it drives the other rack to move synchronously towards each other or synchronously away from each other through the gear, thereby realizing that the left and right sliding plates move synchronously towards each other or synchronously away from each other.

[0016] As a preferred embodiment, the sliding plate is equipped with a lifting arm, and the bottom shell is provided with left and right extending sliding grooves; when the sliding plate slides with the fulcrum toward the direction closer to the second connection point, the lifting arm rises to support the circuit board of the button assembly; and when the sliding plate slides with the fulcrum away from the second connection point, the lifting arm falls to provide the button assembly with greater downward floating space.

[0017] As a preferred embodiment, the sliding plate is provided with a through hole, one end of the lifting arm is fastened into the through hole and can generate a vertical swing; the other end of the lifting arm is provided with a support wheel, and a sliding groove plate is added to the bottom shell to provide a sliding groove, and a guide part is provided at the end of the sliding groove on the sliding groove plate so that the support wheel can enter and exit the sliding groove along the guide part.

[0018] As a preferred embodiment, the elastic arm is distributed at one or more of the front edge, rear edge, left edge, and right edge positions of the bottom shell.

[0019] As a preferred embodiment, the fixing plate has lugs extending outward from its periphery, and a hole is provided on the lugs. A second hole is provided at the location of the second connection point on the elastic arm. A silicone sleeve is also provided, which has a body and an upper connecting post and a lower connecting post integrally connected to the upper and lower ends of the body, respectively. The upper connecting post extends into the hole, and the lower connecting post extends downward into the hole. The body is sandwiched between the elastic arm and the fixing plate.

[0020] As a preferred embodiment, the adjustment mechanism has multiple preset fulcrum positions at different heights to selectively set the fulcrum and obtain a fulcrum at the corresponding height;

[0021] The fulcrum is directly supported at the bottom of the cantilever; or, the fulcrum is positioned below the bottom of the cantilever, maintaining a distance from it.

[0022] Compared with existing technologies, this invention has significant advantages and beneficial effects. Specifically, as described above, the main feature is the connection of a spring arm between the bottom shell and the key assembly. An adjustment mechanism is used to adjust the support position of the fulcrum on the spring arm, changing the effective lever arm length of the spring arm on the key assembly, thereby altering the force supporting the key assembly. This achieves the switching between soft and hard tactile feedback for the entire keyboard, offering flexible adjustment, multi-point adjustment, and highly personalized soft / hard feel adjustment. Furthermore, this technical solution is cost-effective, easy to operate, functionally stable, requires minimal maintenance, is highly practical, and suitable for widespread application.

[0023] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0024] Figure 1 This is an exploded view of a keyboard according to an embodiment of the present invention;

[0025] Figure 2 This is a top view of the keyboard bottom shell assembly (including the bottom shell and the elastic arm, adjustment mechanism, etc. disposed on the bottom shell) according to an embodiment of the present utility model.

[0026] Figure 3 yes Figure 2 View from the center (K ​​direction);

[0027] Figure 4 This is an exploded view of the keyboard bottom shell assembly according to an embodiment of the present utility model;

[0028] Figure 5 This is a perspective view of a keyboard according to an embodiment of the present invention;

[0029] Figure 6 This is another perspective view of a keyboard according to an embodiment of the present invention (a press-type adjustable stand is not installed on the keyboard);

[0030] Figure 7 This is an exploded view of a push-to-adjust leg according to an embodiment of the present invention;

[0031] Figure 8 This is a cross-sectional view of the push-to-adjust leg bracket in the first use state according to an embodiment of the present invention;

[0032] Figure 9 This is a cross-sectional view of the push-to-adjust leg bracket in the second use state according to an embodiment of the present invention;

[0033] Figure 10 This is an exploded view of the cam assembly of the push-to-adjust foot bracket according to an embodiment of the present invention (showing the upper cam and the lower cam).

[0034] Figure 11 This is another exploded view of the cam assembly of the push-to-adjust foot bracket according to an embodiment of the present invention (showing the upper cam and the lower cam).

[0035] Figure 12 This is a perspective view of the mounting base of the push-to-adjust leg bracket according to an embodiment of the present utility model;

[0036] Figure 13 This is a partial bottom view of the mounting base of the push-to-adjust leg according to an embodiment of the present invention (showing the sliding cavity, the slide groove and the first inclined tooth surface).

[0037] Figure 14 This is a diagram illustrating the overall change process of the push-to-adjust leg of this utility model when it switches from a first use state to a second use state.

[0038] Figure 15 This is a diagram illustrating the overall change process of the push-to-adjust leg of this utility model when it switches from the second use state to the first use state.

[0039] Figure 16 This is a diagram illustrating the positional change of the lower cam relative to the upper cam when the push-to-adjust foot bracket of this utility model switches from a first use state to a second use state.

[0040] Figure 17 This is a diagram illustrating the positional change of the lower cam relative to the upper cam when the push-to-adjust foot bracket switches from the second use state to the first use state according to an embodiment of this utility model.

[0041] Figure 18 This is a diagram illustrating the change process of the cam assembly within the sliding cavity when the push-to-adjust foot bracket of this utility model switches from a first use state to a second use state.

[0042] Figure 19 This is a diagram illustrating the change process of the cam assembly within the sliding cavity when the push-to-adjust foot of this utility model switches from the second use state to the first use state.

[0043] Figure 20 This is a bottom view showing the change in the rotation angle of the lower cam in the sliding cavity when the push-to-adjust foot of this utility model switches from the first use state to the second use state.

[0044] Figure 21 This is a bottom view showing the process of the lower cam rotating in the sliding cavity when the push-to-adjust foot switches from the second use state to the first use state, according to an embodiment of this utility model. Detailed Implementation

[0045] Please refer to Figures 1 to 21 As shown, it illustrates the specific structure of an embodiment of the present invention.

[0046] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0047] An adjustable keyboard includes a keyboard body 1, which includes a bottom shell 100 and a key assembly 200 disposed above the bottom shell 100, and a top cover 300. The top cover 300 is assembled onto the bottom shell 100 to accommodate the key assembly 200 between the two. Typically, the top of the keys 230 of the key assembly 200 protrudes from the top surface of the top cover 300 for pressing operation. The key assembly 200 includes a fixed plate 210 stacked on top of each other, a circuit board 220, and a plurality of keys 230 disposed on the fixed plate 210. The circuit board 220 may also refer to a PCBA. The plurality of keys 230 are electrically connected to the circuit board 220.

[0048] A spring arm 110 is mounted on the base shell 100, typically made of metal sheet, such as beryllium copper. The spring arm 110 has two spaced connection points, a first connection point 111 and a second connection point 112, defined along its extension length. These typically refer to the two endpoints of the spring arm 110. The portion of the spring arm 110 located between the first connection point 111 and the second connection point 112 serves as a cantilever portion 113. The first connection point 111 connects to the base shell 100, and the second connection point 112 connects to the button assembly 200. Specifically, around the perimeter of the fixing plate 210... The side extends outward with a lug, and a hole 2101 is provided on the lug. The upper end of the silicone sleeve 114 is connected to the fixing plate 210, that is: the upper connecting post of the silicone sleeve 114 extends into the hole 2101. The silicone sleeve 114 here has a body and an upper connecting post and a lower connecting post integrally connected to the upper and lower ends of the body, respectively. The diameter of the upper connecting post and the lower connecting post is smaller than the diameter of the body. The lower connecting post extends downward into the hole 2 where the second connection point 112 is located on the elastic arm 110, and the upper connecting post extends upward into the hole 2101 of the fixing plate 210. The body is sandwiched between the elastic arm 110 and the fixing plate 210.

[0049] An adjustment mechanism 120 is provided on the bottom shell 100. The adjustment mechanism 120 has a fulcrum 121 that supports the cantilever portion 113. The fulcrum 121 is supported below the cantilever portion 113. The adjustment mechanism 120 is slidably arranged along the extension length direction of the elastic arm 110, that is, it moves between the first connection point 111 and the second connection point 112 to change the position of the fulcrum 121 supporting the cantilever portion 113, thereby changing the distance between the second connection point 112 and the fulcrum 121, that is, changing the effective lever arm length L of the elastic arm 110 on the key assembly 200, thereby changing the force supporting the key assembly 200, realizing the soft and hard switching of the entire keyboard, and the adjustment is flexible and can realize multi-point adjustment. Considering different support height requirements, multiple fulcrum positions of different heights can be preset on the adjustment mechanism 120, so as to selectively set or install fulcrums to obtain the fulcrum 121 of the corresponding height. The height of the fulcrum can be either directly supported at the bottom of the cantilever 113, thus providing contact support, or the downward floating elastic force of the button assembly 200 can be designed with the fulcrum as the swing fulcrum. Alternatively, the fulcrum height can be designed to be slightly lower than the bottom of the cantilever 113, leaving a gap. In this way, the floating elastic force of the button assembly 200 is divided into two stages: firstly, the first connection point 111 serves as the swing fulcrum, with a smaller elastic force and a softer feel. When the elastic arm 110 swings downward until it contacts the fulcrum 121 (at which point the fulcrum 121 provides contact support to the cantilever 113), the subsequent stage uses the fulcrum as the swing fulcrum, with a larger elastic force and a slightly firmer feel compared to the previous stage. Therefore, the firmness of the feel can be adjusted not only by adjusting the effective lever arm length L, but also by flexibly designing single or multi-layered tactile sensations, allowing for diverse designs to meet different usage needs.

[0050] The adjustment mechanism 120 can have various structural forms; specifically in this embodiment, the adjustment mechanism 120 includes a sliding plate 1201 and a sliding handle 1202. The fulcrum 121 is disposed on the sliding plate 1201. For example, a support wheel is screwed and locked onto the side plate of the sliding plate 1201. The circumferential side of the support wheel serves as a support contact surface, resulting in low resistance and easy adjustment during sliding. The sliding handle 1202 is connected to the sliding plate 1201 and is usually exposed outside the keyboard, for example, outside the bottom shell 100, to facilitate the user to manually move the sliding handle 1202. During operation, moving the sliding handle 1202 causes the fulcrum 121 on the sliding plate 1201 to slide synchronously, and the fulcrum 121 supports the position change of the cantilever portion 113. In this embodiment, two sliding plates 1201 are provided, one on the left and one on the right. Therefore, racks 123 extending horizontally are connected to both sliding plates. A sliding handle 1202 is connected to one of the racks 1203, and a gear 1204 meshes between the two racks 1203. The gear 1204 is mounted on the base shell 100 and can rotate horizontally around the Z-axis (i.e., the vertical direction). When the sliding handle 1202 drives one of the racks 1203 to slide, it transmits the transmission through the gear 1204 to the other rack 1203, enabling synchronous opposite movement of the two sliding plates 1201. Synchronous opposing motion, i.e., the two movements are either moving towards each other or moving away from each other; the elastic arm 110 is located at the front or rear edge of the bottom shell 100 or near the edge, and its extension length direction is in the left-right direction; in another embodiment, if the elastic arm 110 is located at the left or right edge of the bottom shell 100, then the sliding plate 1201 is slidably arranged back and forth, and the extension length direction of the elastic arm 110 is in the front-back direction; in many different embodiments, it is also possible to consider distributing the elastic arms 110 around the bottom shell 100, and the sliding plate 1201 and the sliding handle 1202 can be adapted accordingly.

[0051] Furthermore, a lifting arm 1205 is attached to the sliding plate 1201, and a sliding groove 1206 extending to the left and right is provided on the bottom shell 100. When the sliding plate 1201 slides towards the direction close to the second connection point 112 with the fulcrum 121, the lifting arm 1205 gradually rises, so that when the effective lever arm is shorter, the lifting arm 1205 can also support the circuit board 220 of the key assembly 200, and the keyboard becomes more rigid. When the sliding plate 1201 slides away from the second connection point 112 with the fulcrum 121, the lifting arm 1205 gradually descends, so that when the effective lever arm is longer, the supporting effect of the lifting arm 1205 on the circuit board 220 of the key assembly 200 gradually diminishes and provides the key assembly 200 with more downward floating space, and the keyboard becomes more flexible. Specifically, taking the right sliding plate 1201 as an example, the right end of its lifting arm 1205 is fastened to the fastening hole 1207 of the sliding plate 1201, which can generate a certain amount of up and down swing. The left end of the lifting arm 1205 is provided with a support wheel 1208. The bottom shell 100 provides a slide groove 1206 by adding an additional slide groove plate 1209. A guide part is provided on the slide groove plate 1209 at the end of the slide groove 1206 to facilitate the smooth switching of the support wheel 1208 in and out of the slide groove 1206. When the right sliding plate 1201 slides to the left, it falls into the slide groove 1206 along the guide. The slide groove 1206 provides the support wheel 1208 with downward clearance space. When the right sliding plate 1201 slides to the right, it disengages from the slide groove 1206 along the guide. The bottom of the support wheel 1208 is restricted by the top of the slide groove plate 1209. The top of the support wheel 1208 provides support for the circuit board.

[0052] Typically, a tilt angle adjustment mechanism needs to be installed at the bottom of the keyboard. In this embodiment, the keyboard has two press-type adjustable feet 2 at the bottom of the bottom shell to achieve quick switching between multiple tilt states. This can effectively solve the problems of fixed and single adjustment angles in the tilt angle adjustment of most keyboards in the prior art, which adopts a folding support structure. It can also solve the problems of some keyboards in the prior art that can achieve multiple angle adjustments rely on specially designed bottom shell structures, which involve large structural modifications, high costs, and difficulty in promotion. Furthermore, it can solve the problems of a small number of high-end keyboards in the prior art that use complex gas springs or electric adjustment mechanisms, resulting in high costs and complex structures, making them unsuitable for widespread application.

[0053] Specifically:

[0054] A push-to-adjust foot bracket 2 includes a mounting base 10, foot pads 30, and a cam assembly 20;

[0055] The foot pad 30 is hinged to the bottom of the mounting base 10. One end of the foot pad 30 opposite to the hinge is configured as a support part 31, and the other side end opposite to the hinge is configured as a pressing part 33. A first elastic reset member 34 is provided between the foot pad 30 and the mounting base 10 to provide the pressing part 33 with a downward reset force.

[0056] The cam assembly 20 is disposed between the mounting base 10 and the support portion 31. The cam assembly 20 includes an upper cam 21 and a lower cam 22 that are coaxially arranged and can rotate horizontally and undergo axial displacement through their respective inclined tooth surfaces meshing. A second elastic reset member 23 is provided between the upper cam 21 and the mounting base 10 to provide the upper cam 21 with a downward reset force.

[0057] When the pressing part 33 is pressed, the distance by which the lower end of the support part 31 deviates downward from the mounting base 10 changes. This allows the user to easily and quickly switch between multiple tilt states of the tripod. It is suitable for mounting on the bottom of various electronic products (such as keyboards) as a tripod, allowing the electronic product to tilt at different angles, providing a better user experience. This type of tripod has multiple advantages, including simple structure, low production cost, no limitation on the bottom shell structure of electronic products, and convenient operation, making it suitable for widespread application.

[0058] In this embodiment, the mounting base 10 has a downwardly extending sliding cavity 11. The inner peripheral sidewall 12 of the sliding cavity 11 is recessed radially outwardly and has vertically extending sliding grooves 13. The sliding grooves 13 are evenly spaced along the circumference of the inner peripheral sidewall 12. The mounting base 10 is provided with a first inclined tooth surface 14 distributed circumferentially around the outer periphery of the sliding cavity 11.

[0059] The lower end of the upper cam 21 is provided with a second inclined tooth surface 211 distributed circumferentially, and the upper end of the lower cam 22 is provided with a third inclined tooth surface 221 distributed circumferentially. The third inclined tooth surface 221 meshes with the second inclined tooth surface 211, and the lower cam 22 can rotate horizontally and undergo axial displacement relative to the upper cam 21. Furthermore, considering the fit stability of the cam assembly 20, a guide hole 212 is provided at the center of the upper cam 21. Correspondingly, an upwardly extending guide post 222 is provided at the upper center of the lower cam 22. The guide post 222 extends upward into the guide hole 212 and can slide up and down relative to it. The fit between the guide post 222 and the guide hole 212 ensures the coaxiality of the upper cam 21 and the lower cam 22. The outer periphery of the upper cam 21 has a third inclined tooth surface 221 distributed circumferentially. The lower cam 22 has a second protrusion 223 extending vertically on its outer periphery. The second protrusion 223 is evenly spaced along the circumferential direction of the outer periphery of the lower cam 22. The upper cam 21 is located in the sliding cavity 11, and a second elastic reset member 23 is provided between the upper cam 21 and the mounting base 10 to provide a downward force to the upper cam 21. The first protrusion 213 is located in the corresponding slide groove 13 so that the upper cam 21 cannot rotate in the sliding cavity 11. The second protrusion 223 can selectively extend upward into the corresponding slide groove 13 and disengage downward from the corresponding slide groove 13. When it is located in the slide groove 13, it cannot rotate. After disengaging from the slide groove 13, it can generate relative rotation and axial displacement due to the relative action of the second inclined tooth surface 211 and the third inclined tooth surface 221.

[0060] The foot pad 30 has a support portion 31, a hinge portion 32, and a pressing portion 33 integrally formed from front to back. The foot pad 30 is hinged to the mounting base 10 through the hinge portion 32, with the hinge axis being the X-axis, i.e., the horizontal left-right direction, allowing the foot pad 30 to rotate up and down relative to the mounting base 10 around the X-axis. The lower end of the support portion 31 serves as a support surface, and a pad 3101, such as a silicone pad or EVA pad, can be attached to the lower end of the support portion 31 to provide at least one function, such as increasing height, preventing slippage, cushioning, and wear resistance. The upper side of the support portion 31 has... An upwardly extending push portion 311, typically cylindrical, abuts against the lower end of the lower cam 22. Preferably, an upwardly recessed recess 2201, such as a circular recess, can be provided at the lower end of the lower cam 22. The upper end of the push portion 311 extends into the recess 2201, which helps to improve the pushing and positioning effect of the push portion 311 on the lower cam 22, resulting in accurate and stable positioning. A first elastic reset member 34 is provided between the pressing portion 33 and the rear section of the mounting base 10 to provide a downward force to the pressing portion 33.

[0061] In the first usage state, the first protrusion 213 is located in the corresponding slide groove 13, the second protrusion 223 is located in the corresponding slide groove 13, the pushing part 311 of the support part 31 abuts against the lower cam 22, and the lower end of the support part 31 of the foot pad 30 is offset from the mounting base 10 by a first distance L1.

[0062] Pressing the pressing part 33 upwards causes the support part 31 to rotate downwards. The pushing part 311 moves downwards away from the lower cam 22, releasing its pushing effect. The second elastic reset member 23 pushes the upper cam 21 downwards, causing the lower cam 22 to move downwards accordingly. During the downward movement, when the second protrusion 223 of the lower cam 22 disengages from the corresponding groove 13, the second elastic reset member 23 continues to push the upper cam 21 downwards, causing the lower cam 22 to move downwards. Due to the action of the second inclined tooth surface 211 of the upper cam 21 on the third inclined tooth surface 221 of the lower cam 22, the lower cam 22 rotates relative to the support part 31 and moves axially downwards until the lower end of the lower cam 22 abuts against the pushing part 311 of the support part 31. At this point, the lower cam 22 has rotated at a certain angle (to... Figure 20 , Figure 21 For example, rotating 45 degrees), its second protrusion 223 corresponds to the corresponding first inclined tooth surface 14, that is, the first inclined tooth surface 14 plays a blocking and limiting role above the second protrusion 223. At this moment, the second protrusion 223 and the first inclined tooth surface 14 maintain a distance, and the lower end of the support part 31 of the foot pad 30 is offset downward from the mounting base 10 by a third distance L3; and after the operator releases the pressing part 33, under the reset force of the first elastic reset member 34, the pressing part 33 is pushed downward and rotated downward. Simultaneously, the support portion 31 rotates upward, the pushing portion 311 pushes the lower cam 22 upward, and the upper cam 21 and the lower cam 22 move upward together until the second protrusion 223 of the lower cam 22 abuts against the corresponding first inclined tooth surface 14; the distance by which the lower end of the support portion 31 of the foot pad 30 deviates downward from the mounting base 10 is the second distance; the second distance L2 is greater than the first distance L1; the third distance L3 is greater than the second distance L2.

[0063] At this time, the press-type adjustable stand 2 has switched from the first use state to the second use state; due to the increase in its support height, the tilt angle of electronic products such as keyboards increases;

[0064] If the pressing part 33 is pressed upward, the support part 31 rotates downward, and the pushing part 311 moves downward away from the lower cam 22, releasing its pushing effect. The second elastic reset member 23 pushes the upper cam 21 downward, and the lower cam 22 moves downward accordingly. During the downward movement, the second inclined tooth surface 211 of the upper cam 21 acts on the third inclined tooth surface 221 of the lower cam 22, causing the lower cam 22 to rotate relative to the support part 31 and move axially downward until the lower end of the lower cam 22 abuts against the pushing part 311 of the support part 31. At this point, the lower cam 22 has rotated at a certain angle, and its second protrusion 223 corresponds to the corresponding groove 13, that is, the groove 13 is located on the second protrusion 223. The upper part of the foot pad 30 is allowed to extend into the mounting base 10. At this moment, the lower end of the support part 31 of the foot pad 30 is offset from the mounting base 10 by a third distance L3. After the operator releases the pressing part 33, under the reset force of the first elastic reset member 34, the pressing part 33 is pushed downward to rotate downward. At the same time, the support part 31 rotates upward, and the pushing part 311 pushes the lower cam 22 upward to move upward. The upper cam 21 and the lower cam 22 move upward together, and the second protrusion 223 of the lower cam 22 extends into the corresponding slide groove 13. At this time, the pressing-type adjustable foot 2 has switched from the second use state to the first use state. Due to the reduction in its support height, the tilt angle of electronic products such as keyboards is reduced.

[0065] As can be seen, through the structural design and cooperation of the cam group 20 and the slide groove 13, the user can easily and quickly switch between the 0-1 states when pressing the press-type adjustable foot 2.

[0066] Furthermore, a transition slope 214 can be provided between two adjacent second inclined tooth surfaces 211. The transition slope 214 connects the highest end of one second inclined tooth surface 211 and the lowest end of the adjacent second inclined tooth surface 211. Thus, the transition slope 214 and one second inclined tooth surface 211 form a peak, and the transition slope 214 and the other second inclined tooth surface 211 form a valley. In this embodiment, eight grooves are provided, which are distributed at equal angles along the circumference. The inclination angles of the second inclined tooth surface 211 and the third inclined tooth surface 221 match, allowing them to mesh vertically. At the same time, the inclination angles of the second inclined tooth surface 211 and the first inclined tooth surface 14 match, allowing them to mesh vertically. The first inclined tooth surface 14 has eight teeth distributed at equal angles along the circumference, the second inclined tooth surface 211 has eight teeth distributed at equal angles along the circumference, the transition inclined surface 214 has eight teeth distributed at equal angles along the circumference, and the third inclined tooth surface 221 has four teeth distributed at equal angles along the circumference. Of course, in actual design and manufacturing, the number is not limited, preferably an even number, preferably twice the number of the second inclined tooth surface 211 and the third inclined tooth surface 221, and the number of the first inclined tooth surface 14 is the same as the number of the second inclined tooth surface 211.

[0067] like Figure 13 As shown, in this embodiment, from a bottom-view angle, the radial depths of adjacent grooves 13 are alternately deep and shallow. The lower end of the groove 13 penetrates the first inclined tooth surface 14. The third inclined tooth surface 221 extends radially outward beyond the outer diameter edge of the second inclined tooth surface 211 but does not extend beyond the outer diameter edge of the first inclined tooth surface 14. The first protrusion 213 is located within the projection area of ​​the second inclined tooth surface 211, and the second protrusion 223 is located within the projection area of ​​the third inclined tooth surface 221, such that the second protrusion 223 and the corresponding first protrusion 213 can share the groove 13 with a deeper radial depth, while the groove 13 with a shallower radial depth is used alone by the corresponding first protrusion 213.

[0068] To make it clearer, in Figures 18 to 21 In the diagram, grooves with deeper radial depth are marked as 13', and grooves with shallower radial depth are marked as 13".

[0069] The second elastic reset member 23 is a compression spring, with its upper and lower ends acting on the inner top of the sliding cavity 11 and the upper end of the upper cam 21, respectively. Typically, an extended shaft portion 215 extends upward from the upper end of the upper cam 21. On the one hand, it is used for the compression spring to be sleeved on the outer periphery of the extended shaft portion 215, which is beneficial to the ease of installation and positioning and stability of the second elastic reset member 23. On the other hand, it can lengthen the depth of the guide hole 212 and improve the reliability of the fit between the guide post 222 and the guide hole 212. The first elastic reset member 34 is designed as a compression spring, with its upper and lower ends acting on the bottom rear end of the mounting base 10 and the top of the pressing part 33, respectively. Alternatively, the first elastic reset member 34 can also be a torsion spring, which can be installed at the hinge or at the location of the pressing part 33.

[0070] The press-type adjustable feet 2 constitute an independent functional component. Their placement is independent of the structure of the electronic product's bottom shell, and the structure of the bottom shell is not limited by the press-type adjustable feet 2. Typically, the press-type adjustable feet 2 are directly added to the bottom of the electronic product or its bottom shell. In this embodiment, the top of the mounting base 10 is provided with a threaded mounting hole 15, and correspondingly, a connecting hole 15' is provided on the bottom shell of the keyboard or other electronic product. A screw 40 passes through the connecting hole and is threaded into the threaded mounting hole 15, thereby locking the mounting base 10 to the bottom of the keyboard. In actual design and manufacturing, this installation method is not limited to this; for example, adhesive bonding can be used to fix the mounting base 10 to the bottom of the keyboard. Thus, the press-type adjustable feet 2 are installed as an independent functional module on the bottom of the keyboard or other electronic product. This is applicable to various electronic products and simplifies the bottom plate structure of the electronic product itself, because compared to traditional technologies, the bottom shell design does not need to consider the tilt angle adjustment structure as much. A recessed area can be reserved at the bottom of the keyboard for the placement of the press-type adjustable feet 2. In this way, the upper part of the press-type adjustable feet 2 sinks into the bottom of the keyboard, and the thickness protruding below the bottom surface of the keyboard becomes thinner. On the one hand, it plays a role in accommodating and protecting the press-type adjustable feet 2. On the other hand, it is suitable for situations with a small tilt angle. If the tilt angle is slightly larger, it is not necessary to reserve a recessed area.

[0071] Furthermore, the left and right edges of the foot pad 30 are provided with lateral protective walls 301 along the support portion 31 from the hinge portion 32. The rear ends of the left and right lateral protective walls 301 are connected as one unit to form a U-shaped enclosure wall, which can strengthen the overall structural strength of the foot pad 30. During use, it is not easy to deform or be damaged. It can also shield and protect the working area of ​​the push portion 311, preventing dust and dirt from entering. Due to the U-shaped enclosure wall, the upper end of the U-shaped enclosure wall can abut against the bottom end of the mounting base 10, which can form a certain support thickness. Even if the elastic element fails, it can still provide a certain support for the electronic product, so as not to fail to support the tilt angle and cause complete functional failure. In this case, if the tilt angle cannot be adjusted and switched well, the user can replace one or both of the second elastic reset component and the first elastic reset component as needed to restore the normal use function of the product.

[0072] The key design feature of this invention lies in its connection of a spring arm between the bottom shell and the key assembly. An adjustment mechanism allows for adjustment of the fulcrum's support position on the spring arm, changing the effective lever arm length of the spring arm on the key assembly and thus altering the force supporting the key assembly. This enables the entire keyboard to switch between soft and hard tactile feedback, offering flexible adjustment, multi-point adjustment, and highly personalized tactile feedback. Furthermore, this technical solution is cost-effective, easy to operate, functionally stable, requires minimal maintenance, and is highly practical and suitable for widespread application.

[0073] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. An adjustable touch keyboard, comprising a keyboard body (1), the keyboard body (1) comprising a bottom shell (100) and a key assembly (200) arranged above the bottom shell (100); the key assembly (200) comprising a fixed plate (210), a circuit board (220) arranged above the fixed plate (210), and a plurality of keys (230) arranged on the fixed plate (210); characterized in that: a resilient arm (110) is mounted on the bottom shell (100), the resilient arm (110) is defined with a first connecting point (111) and a second connecting point (112) arranged at a distance in the extension direction of the resilient arm (110), a cantilever portion (113) is arranged between the first connecting point (111) and the second connecting point (112) on the resilient arm (110), the first connecting point (111) is connected to the bottom shell (100), and the second connecting point (112) is connected to the key assembly (200); an adjusting mechanism (120) is arranged on the bottom shell (100), the adjusting mechanism (120) has a fulcrum (121) capable of supporting the cantilever portion (113), the fulcrum (121) is located below the cantilever portion (113), the adjusting mechanism (120) is slidably arranged along the extension direction of the resilient arm (110) to change the position of the fulcrum (121) supporting the cantilever portion (113), thereby changing the distance between the second connecting point (112) and the fulcrum (121). The adjusting mechanism (120) comprises a sliding plate (1201) and a sliding handle (1202), the fulcrum (121) is arranged on the sliding plate (1201), and the sliding handle (1202) is connected to the sliding plate (1201); the sliding handle (1202) is actuated to synchronously slide the fulcrum (121) on the sliding plate (1201), and the position of the fulcrum (121) supporting the cantilever portion (113) changes.

2. The tactile adjustable keyboard of claim 1, wherein: The sliding handle (1202) is exposed outside the keyboard body (1).

3. The tactile adjustable keyboard of claim 2, wherein: A support wheel is screwed and fixed on the side edge folding plate of the sliding plate (1201), and the circumferential surface of the support wheel serves as a support contact surface for supporting the bottom of the cantilever portion (113).

4. The tactile adjustable keyboard of claim 2, wherein: The sliding plate (1201) is arranged on the left and right sides, and a left-right extending rack (1203) is connected to each of the two sliding plates (1201); the sliding handle (1202) is connected to one of the racks (1203), and a gear (1204) is meshingly and transmissionally connected between the two racks (1203); the gear (1204) is mounted on the bottom shell (100) and can rotate horizontally around the Z-axis; when the sliding handle (1202) drives one of the racks (1203) to slide, the other rack (1203) is synchronously moved towards or away from through the transmission of the gear (1204), thereby realizing the synchronous movement of the left and right sliding plates (1201) towards or away from each other.

5. The tactile adjustable keyboard of claim 2, wherein: ​ 6. The tactile adjustable keyboard of claim 2, wherein: The sliding plate (1201) is provided with a lifting arm (1205), and the bottom shell (100) is provided with a left-right extending sliding groove (1206); when the sliding plate (1201) slides towards the second connecting point (112) with the fulcrum (121), the lifting arm (1205) is lifted to support the circuit board (220) of the key assembly (200); when the sliding plate (1201) slides away from the second connecting point (112) with the fulcrum (121), the lifting arm (1205) is lowered to provide more floating space for the key assembly (200).

7. The tactile adjustable keyboard of claim 6, wherein: The sliding plate (1201) is provided with a through hole (1207) extending upwards and downwards, one end of the lifting arm (1205) is buckled in the through hole (1207) and can swing up and down, and the other end of the lifting arm (1205) is provided with a supporting wheel (1208); the bottom shell (100) is provided with a sliding groove (1206) through the addition of a sliding groove plate (1209), and the sliding groove plate (1209) is provided with a guide part at the end of the sliding groove (1206) to enable the supporting wheel (1208) to enter and exit the sliding groove (1206) along the guide part.

8. The tactile adjustable keyboard of claim 1, wherein: The elastic arms (110) are distributed at one or more of the front side edge position, the rear side edge position, the left side edge position and the right side edge position of the bottom shell (100).

9. The tactile adjustable keyboard of claim 1, wherein: The periphery of the fixed plate (210) extends outwardly with a lug, and the lug is provided with a hole position one (2101); the elastic arm (110) is provided with a hole position two at the second connecting point (112); a silica gel sleeve (114) is further provided, the silica gel sleeve (114) has a body part, an upper connecting column and a lower connecting column which are integrally connected to the upper end and the lower end of the body part respectively, the upper connecting column extends into the hole position one (2101), the lower connecting column extends downwardly into the hole position two, and the body part is clamped between the elastic arm (110) and the fixed plate (210).

10. The tactile adjustable keyboard according to any one of claims 1 to 9, wherein: The adjusting mechanism (120) is provided with multiple fulcrum positions of different heights to selectively set the fulcrum (121) and obtain the fulcrum (121) of corresponding height. The set fulcrum (121) directly supports the bottom of the cantilever part (113); or the set fulcrum (121) is lower than the bottom of the cantilever part (113) by a reserved interval.

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