CN114204931A

CN114204931A - Key and keyboard

Info

Publication number: CN114204931A
Application number: CN202111610754.5A
Authority: CN
Inventors: 武建峰; 杜修富
Original assignee: Quanzhou Kuntaixin Microelectronic Technology Co ltd
Current assignee: Quanzhou Kuntaixin Microelectronic Technology Co ltd
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2022-03-18

Abstract

The invention relates to the field of keyboards and provides a key and a keyboard, wherein the key comprises a base body, a moving part movably arranged on the base body along a preset track, a rotating part rotatably arranged on the base body and a magnetic angle sensor fixedly arranged on the base body, wherein a pressing part of the key is positioned on the moving part; the rotation axis of the rotating part extends along a first direction and the preset track extends along the first direction, the moving part and the rotating part are in transmission connection through the matching of the spiral guide rail and the guide part, the guide part can move along the spiral guide rail, two ends of the spiral guide rail along the first direction are a first end and a second end respectively, and the spiral guide rail extends from the first end to the second end in a spiral mode around the axis of the rotating part; the spiral guide rail is positioned on the rotating part, and the guide part is positioned on the moving part; the rotating member has a permanent magnet, and the magnetic angle sensor is used to detect rotation of the permanent magnet. The key disclosed by the invention is simple in structure, small in size, flexible to press, good in economy and accurate in detection of the pressing action.

Description

Key and keyboard

Technical Field

The invention relates to the field of keyboards, in particular to a key and a keyboard.

Background

Some current keyboards adopt the magnetic sensor to detect the action of pressing of button, and the more common scheme is for the button installation permanent magnet, the key cap synchronous motion of permanent magnet and button to adopt hall switch to come the motion of response permanent magnet, can realize the detection of pressing the action to the key cap with non-contact's mode like this, have beneficial technological effects such as waterproof, dustproof, reduction mechanical wear.

The Hall switch has two states of being triggered and not being triggered, and when the keycap is in the bounce state (the keycap is located at the initial position), the Hall switch is in the state of not being triggered, and the keycap is pressed to the permanent magnet to be close to the Hall switch, so that the Hall switch is triggered, and the keycap is detected to be pressed through the Hall switch.

However, when the keyboard is operated quickly, the key cap may be pressed again when the key cap is not fully bounced (not returned to the initial position), and in the process, the hall switch may be always in a triggered state, so that no matter how the key cap is continuously pressed, the pressing action cannot be detected by the hall switch.

In addition, some conventional keyboards employ a linear magnetic sensor to detect the pressing action of the key, for example, chinese patent application publication No. CN108415578A discloses that a linear signal is output by the magnetic sensor, and the detection of the pressing action of the key cap is realized according to the linear signal.

However, the magnetic sensors (hall switches and linear magnetic sensors) in the above schemes detect the pressing action of the key cap by sensing the strength of the magnetic field, on one hand, the detection of the magnetic field strength by the magnetic sensor is easily interfered by external environmental factors such as temperature (commonly called temperature drift), so that the detection results of the magnetic sensors on the magnetic field with the same strength under different temperature environments are inconsistent, the usability of the keyboard under different temperature environments is inconsistent, and the keyboard generates heat during the use process, so that the keyboard also has obvious performance changes during high-strength use of games and the like, especially in the scheme of detecting the pressing action of the key cap by using the hall sensor, because the power consumption of the hall sensor is high, the temperature of the keyboard is easily increased after the keyboard is continuously used for a certain time, and the performance of the keyboard also has large changes during the use, the user's requirements for keyboard performance cannot be met.

On the other hand, the performance consistency of the magnetic field intensity detected by different magnetic sensors is poor due to possible errors of the magnetic field intensity detected by the magnetic sensors, even though the magnetic sensors produced in the same batch have different performance, the detection results of the magnetic sensors on the magnetic field with the same intensity may be inconsistent, so that in a scheme that the keyboard detects the key cap pressing action of each key by detecting the magnetic field intensity through the magnetic sensors, some keys can be detected as the key cap being pressed by the magnetic sensors when the key cap is pressed for a small part of travel, and other keys can be detected as the key cap being pressed by the magnetic sensors after the key cap is pressed for most of travel, so that the user experience is poor; in addition, the magnetic field intensity of the permanent magnet also has an error range, and the magnetic field intensity of the permanent magnet arranged on each key cap is not consistent, so that the inconsistency of the performance of each key on the same keyboard can be further aggravated.

In addition, the chinese utility model patent with publication number CN208890780U discloses a novel key with the purpose of detecting the depth state of the key and good signal linearity, and the scheme adopts a rotating magnetic field sensor to detect the pressing depth state of the key, so as to improve the signal linearity; however, the scheme adopts a gear-rack mode for transmission, and if the diameter of the gear is set to be too large, the volume/size of the key is too large, so that the application scenes of the novel key are few; if the diameter of the gear is set too small, the difficulty of driving the gear is increased, and a larger pressing force is required to press the key, so that the pressing movement of the key is not flexible enough.

Disclosure of Invention

One of the objectives of the present invention is to overcome the above-mentioned drawbacks of the prior art and to provide a key capable of accurately detecting the motion of a moving element, and having a small volume and size and easy pressing.

The key provided by the invention comprises a base body, a moving part movably arranged on the base body along a preset track, a rotating part rotatably arranged on the base body and a magnetic angle sensor fixedly arranged on the base body, wherein a pressing part of the key is positioned on the moving part; the rotation axis of the rotating part extends along a first direction and the preset track extends along the first direction, the moving part and the rotating part are in transmission connection through the matching of the spiral guide rail and the guide part, the guide part can move along the spiral guide rail, two ends of the spiral guide rail along the first direction are a first end and a second end respectively, and the spiral guide rail extends from the first end to the second end in a spiral mode around the axis of the rotating part; the spiral guide rail is positioned on the rotating part, and the guide part is positioned on the moving part; and/or the spiral guide rail is positioned on the moving part, and the guide part is positioned on the rotating part; the rotating member has a permanent magnet, and the magnetic angle sensor is used to detect rotation of the permanent magnet.

From the above, on one hand, the scheme indirectly detects the motion condition of the motion part by detecting the rotation of the permanent magnet through the magnetic angle sensor, and further detects the pressing action of the pressing part, so that the non-contact detection of the pressing action can be realized, and compared with the scheme of detecting the pressing action by sensing the magnetic field intensity through the magnetic sensor in the prior art, the detection performance of the magnetic angle sensor is not easily influenced by environmental factors such as temperature, so that the detection result of the magnetic angle sensor is not easy to change along with the temperature change, the consistency of the detection result of the magnetic angle sensor under different temperature environments is better, therefore, the detection result of the magnetic angle sensor can more accurately reflect the pressing condition of the pressing part, and the detection of whether the pressing part is pressed or not is not easily influenced by the external environmental factors such as temperature, when the pressing part is continuously pressed under the condition that the pressing part is not completely returned, the pressing action can still be detected, the pressing condition of the pressing part can be accurately detected, and the user experience is better; and, because the testing result of magnetism angle sensor is difficult for receiving environmental factor influences such as temperature, and magnetism angle sensor's detection precision is preferred, therefore when adopting the button of a plurality of this scheme to detect same magnetic field, the uniformity of testing result is better, and this scheme is when being applied to the keyboard, and the performance uniformity of each button is better.

On the other hand, the proportional relation between the moving stroke of the moving part and the rotating stroke of the rotating part can be adjusted only by adjusting the screw pitch of the spiral guide rail, and the two-stroke proportional relation can not be adjusted by the scheme, so that the screw pitch of the spiral guide rail can be set to the greatest extent by aiming at ensuring the flexibility of key pressing, the key size is not increased by worrying about the increase of the key size, the pressing difficulty of pressing the key is reduced, the flexibility of key pressing movement is improved, the size of the key is reduced, the application scene range of the key is expanded, and the key is ensured to be suitable for being applied to a keyboard which is described later.

In addition, the rotating part and the moving part are directly driven, so that the moving part is easy to press, and the key moves flexibly.

Preferably, the number of the spiral guide rails and the guide parts is at least two groups distributed along the circumferential direction of the rotating member.

Therefore, the transmission stability of the rotating part and the moving part is facilitated.

In a further preferred embodiment, the magnetic angle sensor comprises a magnetoresistive sensor element.

Therefore, the power consumption of the magnetic angle sensor is lower, and the influence of the change of environmental factors such as temperature on the detection performance of the pressing action is further reduced.

Still preferably, the magnetic angle sensor is located on one side of the rotating member in the first direction.

Therefore, on one hand, the magnetic angle sensor is placed on the shaft in comparison with the permanent magnet, so that the scheme can adopt the existing universal magnetic angle sensor, is favorable for improving the universality of the magnetic angle sensor and is favorable for improving the economy of the key of the scheme; on the other hand, when the keys of the scheme are applied to the keyboard, the magnetic angle sensors of the keys can be arranged on the same circuit board, so that the structure of the keyboard is simplified, and the economy of the keyboard is improved.

In a further preferred embodiment, the south pole and the north pole of the permanent magnet are arranged perpendicular to the first direction, the axis of rotation of the rotary part passes through the center of the permanent magnet and passes through the magnetic angle sensor.

In a further preferred embodiment, one of the rotary member and the moving member has a transmission cylinder, and the other has a transmission shaft, and the transmission cylinder is fitted around the transmission shaft.

Therefore, the structure of the key is compact, the size of the key is further reduced, and the miniaturization of the key is further facilitated.

The normal line of the transmission cylinder is circular along the inner contour shape of the section of the first direction, the normal line of the transmission shaft is circular along the inner contour shape of the section of the first direction, and the transmission cylinder is rotatably and slidably matched with the transmission shaft.

Therefore, the transmission stability of the rotating part and the moving part is further facilitated.

The further proposal is that the spiral guide rail is arranged on the wall of the transmission cylinder, and the guide part extends from the transmission shaft to the spiral guide rail; or the spiral guide rail is arranged on the transmission shaft, and the guide part extends to the spiral guide rail from the transmission cylinder.

Still another preferred scheme is, also include the pre-tightening return part, the moving part keeps in the initial position under the influence of the pre-tightening return part; and when the moving element leaves the initial position along the preset track, the acting force of the pre-tightening return element tends to force the moving element to return to the initial position along the preset track.

The spiral guide rail comprises a spiral surface which inclines towards the first direction, and the spiral surface is abutted with the guide part under the action of the pre-tightening return piece.

Still another preferred scheme is that the helical guideway includes the helicla flute, and the helicla flute has relative first helicoid and the second helicoid that sets up, and first helicoid and second helicoid all extend around the axis spiral of rotating member, along first direction, and the guide part cooperates between corresponding first helicoid and second helicoid.

Therefore, when the moving part reciprocates along the preset track, the rotating part and the corresponding moving part can synchronously move according to respective rules through the matching of the spiral guide rail and the guide part, and the pre-tightening part (such as the pre-tightening torsion spring in the third embodiment) does not need to be arranged for the rotating part independently, so that the number of the pre-tightening parts is reduced, and the structure of the key is further simplified.

The invention also aims to overcome the defects of the prior art and provide a keyboard which can accurately detect the key actions, has smaller key volume/size and is easier to press keys.

The keyboard provided by the invention comprises the key.

Unlike the scheme that only needs to detect whether the key is pressed, the CN208890780U scheme uses a magnetic angle sensor in the novel key based on the purpose of detecting the depth state of the key and good signal linearity; however, the application scenario of the keyboard determines that it only needs to detect whether the key is pressed, that is, the CN208890780U solution gives a counter technical hint to apply the magnetic angle sensor to the keyboard, and the skilled person does not easily think that applying the magnetic angle sensor to the keyboard to detect whether the key is pressed.

This scheme is based on the promotion and presses the detection precision of the condition/promotes the purpose of pressing the uniformity of testing result to the button and is applied to the keyboard with magnetism angle sensor, however, if the simple structure with CN208890780U scheme is applied to the button of keyboard, can have the structure complicacy, press the great problem of the degree of difficulty, specifically: on one hand, the CN208890780U scheme adopts a gear-rack transmission mode, and if the diameter of the gear is set too large, the volume/size of the key is too large, which is not favorable for the application of the keyboard; if the diameter of the gear is set to be too small, the driving difficulty of the gear is increased, and the key can be pressed by a larger pressing force at the moment, so that the use of the keyboard is not facilitated; on the other hand, the rotating magnetic field sensor of the CN208890780U solution is located on one side of the key perpendicular to the pressing direction, so if the structure of the CN208890780U solution is applied to the key of the keyboard, a circuit board needs to be separately installed on one side of each key perpendicular to the pressing direction to install the rotating magnetic field sensor, which results in a complex structure of the circuit board, a complex structure of the keyboard, and poor economy.

This scheme adopts under the condition of the action of pressing of magnetic angle sensor detection button at the keyboard, from promoting the flexibility of button press motion and pursuing two aspects of button volume/size miniaturization, carry out the transmission with the cooperation that motion piece and rotating member pass through helical guideway and guide and be connected, only need adjust helical guideway's pitch like this and just can adjust the proportional relation between the removal stroke of motion piece and the rotation stroke of rotating member, and can not increase the volume/size of button, the existing miniaturization that is favorable to guaranteeing the button, be favorable to promoting the flexibility of button press motion again.

The keyboard is provided with a circuit board, a plurality of keys are arranged, each rotating piece is positioned on the same side of the circuit board along the thickness direction, and each magnetic angle sensor is arranged on the circuit board; the first direction is along a thickness direction of the circuit board.

Therefore, the keyboard is beneficial to simplifying the structure of the circuit board, simple in structure, good in economical efficiency, accurate in detection of key actions, small in size and flexible in pressing.

Drawings

FIG. 1 is an exploded view of an embodiment of a key of the present invention.

FIG. 2 is a cross-sectional view of an embodiment of the key of the present invention, the normal to the cross-sectional plane being along the X-axis.

Fig. 3 is a structural view of the moving member and the rotating member engaged in the embodiment of the key of the present invention.

Detailed Description

Fig. 1 to 3 of the present embodiment adopt a unified spatial rectangular coordinate system (right-hand system) to represent the relative positional relationship between the components, wherein the Z-axis positive direction is vertically upward.

Referring to fig. 1 to 3, the keyboard of this embodiment includes an upper casing, a lower casing (not shown in the figures), a circuit board 1000 and a plurality of keys 2000 of this embodiment, a normal line of a main surface of the circuit board 1000 is along a Z-axis direction, the upper casing is located at a Z-axis positive side of the lower casing, the upper casing and the lower casing are fixedly connected in a screw manner, the upper casing and the lower casing form a first mounting cavity, and a combination of the upper casing, the lower casing and the circuit board 1000 may be configured with reference to an existing keyboard, which is not described herein again; alternatively, in another embodiment of the present invention, only the circuit board 1000 and the magnetic angle sensor 9 described later may be disposed in the first mounting cavity, and other structures of the key 2000 are all fixed to the Z-axis positive side of the upper housing, so that the first mounting cavity can be set as a sealed cavity, which is beneficial to achieve the waterproof and dustproof purposes of the keyboard.

The key 2000 of the present embodiment includes a cover 1, a frame 2, a moving element, a rotating element, a pre-tightening return element and a magnetic angle sensor 9, the cover 1 and the frame 2 of the present embodiment constitute a base of the present invention, the upper case and the lower case constitute a case of the keyboard, the base is fixedly connected with the case, and the transmission from the moving element to the rotating element of the present embodiment is realized by matching a spiral groove 171 (an example of a spiral guide) and a convex pillar 184 (an example of a guide portion) which will be described later.

The frame body 2 is provided with an opening on the Z-axis positive side, the cover body 1 is positioned on the Z-axis positive side of the frame body 2, the frame body 2 is positioned on the Z-axis positive side of the circuit board 1000, the cover body 1 and the frame body 2 are fixedly connected in a buckling mode, the cover body 1 and the frame body 2 enclose a second installation cavity 2001, and the rotating piece and the pre-tightening return piece are installed in the second installation cavity 2001; the rotating element, the moving element and the pre-tightening return element of the present embodiment are mounted on the housing through the frame body 2 and the cover body 1, alternatively, in other embodiments of the present invention, the frame body 2 and the cover body 1 may be eliminated, and the rotating element, the moving element and the pre-tightening return element are directly mounted on the housing, in this case, the housing is the base of the present invention.

The moving part comprises a key cap (not shown in the figure), and an integrally formed key shaft 3, a connecting plate 16 and a transmission cylinder 17, wherein the key shaft 3 is provided with a mounting hole 34 with an opening facing to the negative direction of the Z axis, the normal line of the mounting hole 34 is circular along the cross-sectional profile shape of the Z axis direction, the key shaft 3, the connecting plate 16 and the transmission cylinder 17 are sequentially connected along the negative direction of the Z axis, the normal line of the main surface of the connecting plate 16 is along the Z axis direction, the center lines of the mounting hole 34 and the transmission cylinder 17 are superposed and are along the Z axis direction, the outer edge of the connecting plate 16 is protruded on the radial outer side of the outer peripheral wall of the transmission cylinder 17, the transmission cylinder 17 and the connecting plate 16 are all positioned in a second mounting cavity 2001, the cover body 1 is provided with a first through hole penetrating along the Z axis direction, the key shaft 3 is slidably arranged in the first through hole along the Z axis direction, the cross-sectional dimension of the normal line of the connecting plate 16 along the Z axis direction is larger than that of the first through hole, the peripheral wall of the transmission cylinder 17 is provided with a spiral groove 171, the spiral grooves 171 penetrate through the wall of the transmission cylinder 17 in the radial direction, the negative Z-axis end of each spiral groove 171 is an open end (an example of a first end), the positive Z-axis end of each spiral groove 171 is a closed end (an example of a second end), the spiral grooves 171 extend from the open end to the closed end in a spiral mode around the center line of the transmission cylinder 17, the number of the spiral grooves 171 is two, and the two spiral grooves 171 are distributed in an array mode along the circumferential direction of the transmission cylinder 17.

The key cap is installed at the Z axle forward end of key axle 3, and the epitheca has the second through-hole that link up along the Z axle direction, and the key cap exposes in the Z axle forward side of keyboard through the second through-hole, and the Z axle forward side wall face of key cap is the splenium of pressing of button 2000, and the Z axle direction of this embodiment is the first direction, and the track is followed Z axle direction and first through-hole to predetermine, and the motion piece can slide from top to bottom along this predetermined track.

The central line of the transmission cylinder 17 coincides with the rotation axis of the rotating piece, the rotating piece comprises a main body structure 18 and a permanent magnet 8, the main body structure 18 of the rotating piece is in a stepped shaft shape, the cross section profile shape of the normal line of the main body structure 18 of the rotating piece along the Z direction is circular, the main body structure 18 of the rotating piece comprises a first shaft section 181, a second shaft section 182 and a third shaft section 183 which are sequentially connected along the Z axis positive direction and have coincident axes, the diameters of the first shaft section 181 and the third shaft section 183 are smaller than that of the second shaft section 182, the first shaft section 181 is rotatably connected with the frame body 2, and the third shaft section 183 is rotatably and slidably matched in the mounting hole 34; of course, in order to avoid the first shaft section 181 from being disengaged from the frame body 2 in the Z-axis positive direction, it is preferable to provide a limiting structure (not shown), for example, the limiting structure is a pre-tightening compression spring provided in the mounting hole 34, a Z-axis positive end of the pre-tightening compression spring abuts against the key shaft 3, a Z-axis negative end of the pre-tightening compression spring abuts against the third shaft section 183, and for example, the first shaft section 181 is inserted to the Z-axis negative side of the frame body 2, and the limiting structure is connected to the first shaft section 181 on the Z-axis negative side of the frame body 2.

The transmission cylinder 17 is sleeved on the outer peripheral wall of the second shaft section 182, two convex columns 184 protruding towards the radial outer side are arranged on the outer peripheral wall of the second shaft section 182, the two convex columns 184 are distributed along the circumferential array of the second shaft section 182, the two convex columns 184 correspond to the two spiral grooves 171 one by one, the convex columns 184 penetrate through the corresponding spiral grooves 171 along the radial direction, the convex columns 184 are in contact with the side wall surfaces of the corresponding spiral grooves 171, and the convex columns 184 can slide along the spiral grooves 171 relative to the transmission cylinder 17; alternatively, in other embodiments of the present invention, the number of the matching sets of the spiral grooves 171 and the convex columns 184 may be three, four, or the like.

The transmission cylinder 17 of the present embodiment and the hole wall of the mounting hole 34 constitute the transmission cylinder of the present invention, and the second shaft section 182 and the third shaft section 183 of the present embodiment constitute the transmission shaft of the present invention; alternatively, in other embodiments of the present invention, the fitting of the mounting hole 34 and the third shaft section 183 may be eliminated, and the outer peripheral wall of the second shaft section 182 and the inner peripheral wall of the transmission cylinder 17 may be set to be rotatably and slidably fitted.

The permanent magnet 8 is located at the Z-axis negative end of the rotating member. Specifically, the permanent magnet 8 of this embodiment is an annular magnet, the permanent magnet 8 is fixedly sleeved on the first shaft section 181, and the permanent magnet 8 of this embodiment is located in the second mounting cavity 2001.

The pre-tightening return piece in this embodiment is a helical compression spring 19, the helical compression spring 19 is sleeved on the peripheral wall of the transmission cylinder 17, a Z-axis negative end of the helical compression spring 19 abuts against a Z-axis positive side wall of the frame body 2, a Z-axis positive end of the helical compression spring 19 abuts against a Z-axis negative side wall of the connecting plate 16, and the Z-axis positive side wall of the connecting plate 16 abuts against a Z-axis negative side of the cover body 1 under the extrusion action of the helical compression spring 19.

The magnetic angle sensors 9 of the present embodiment are located on the negative Z-axis side of the permanent magnet 8, each magnetic angle sensor 9 is located on the axis relative to the corresponding permanent magnet 8 (the magnetic angle sensor 9 is located on the side of the corresponding permanent magnet 8 along the rotation axis direction), the magnetic angle sensors 9 of each key 2000 are all located on the same circuit board 1000, preferably, the distribution directions of the south pole and the north pole of the permanent magnet 8 are perpendicular to the first direction, the rotation axis of the rotating member passes through the center position of the permanent magnet 8, and the magnetic angle sensors 9 pass through; in the present embodiment, the existing general magnetic angle sensor 9 can be used, for example, the magnetic angle sensor 9 in the invention patent application with publication number CN109855668A is adopted as the magnetic angle sensor 9, which is beneficial to improving the universality of the magnetic angle sensor 9 and the economy of the key 2000 and the keyboard of the present embodiment.

The magnetic angle sensor 9 is also commonly referred to as a magnetic encoder, a magnetic encoding chip, such as the magnetic encoding chip of the utility model publication No. CN 206455664U.

When the positive Z-axis side wall of the connecting plate 16 abuts against the negative Z-axis side wall of the cover body 1, the moving part and the rotating part are both located at initial positions, when a user presses the keycap along the negative Z-axis direction, the pressing force overcomes the elastic force of the spiral pressure spring 19, the keycap, the key shaft 3, the connecting plate 16 and the transmission cylinder 17 synchronously move towards the negative Z-axis direction, when the transmission cylinder 17 moves towards the negative Z-axis direction, the rotating part is driven to rotate around the rotation axis of the rotating part through the matching of the positive Z-axis side spiral surface of the spiral groove 171 and the convex column 184, so that the permanent magnet 8 is driven to rotate, the rotation condition of the permanent magnet 8 can correspond to the pressing condition of the keycap, and the pressing condition of the keycap can be reflected through detecting the rotation condition of the permanent magnet 8; after the user releases the pressing force on the keycap, the key shaft 3, the connecting plate 16 and the transmission cylinder 17 return to the initial position along the positive direction of the Z axis under the action of the helical compression spring 19 until the connecting plate 16 abuts against the negative side wall of the Z axis of the cover body 1, and in the process, the rotation piece is driven to rotate around the rotation axis of the rotation piece to return through the matching of the spiral surface of the negative side of the Z axis of the spiral groove 171 and the convex column 184.

The magnetic angle sensor 9 of the present embodiment detects the rotation of the permanent magnet 8, and the detection result of the magnetic angle sensor 9 reflects the relative ratio of the magnetic field strength in each direction, specifically, the magnetic angle sensor 9 determines the rotation of the permanent magnet 8 according to the direction of the detected magnetic field, and the magnetic field direction is expressed as the proportional relationship of the magnetic field strength in at least two directions perpendicular to each other, for example, when the magnetic angle sensor 9 detects the magnetic field component on the XOY plane, the magnetic field direction can be expressed as the proportional relationship of the magnetic field component in the X-axis direction and the magnetic field component in the Y-axis direction; therefore, although environmental factors such as temperature easily affect the detection accuracy of the magnetic sensor on the magnetic field intensity, the detection result of the magnetic angle sensor 9 is not easily affected, that is, the detection result of the magnetic angle sensor 9 is not easily affected by environmental factors such as temperature, the detection result of the magnetic angle sensor 9 in different temperature environments has good consistency, the detection error of the magnetic angle sensor 9 is small, the performance of the key 2000 of the embodiment is not easily fluctuated due to the change of the environmental factors such as temperature, the performance consistency of the key 2000 in different temperature environments is good, and the performance consistency of each key 2000 of the same keyboard can be good, which is beneficial to improving the user experience.

Therefore, when the keyboard of the embodiment is applied to continuous and quick pressing situations such as games, even if the keycap is pressed again under the condition that the keycap is not completely returned, the pressing action can cause the permanent magnet 8 to rotate in the counterclockwise direction, and further can be detected by the magnetic angle sensor 9, so that the user experience can be improved; specifically, the magnetic angle sensor 9 of this embodiment is configured to detect a rotation angle and a direction of the corresponding permanent magnet 8, and when the magnetic angle sensor 9 detects that the permanent magnet 8 continuously rotates in a preset rotation direction (for example, in an anticlockwise direction when viewing the permanent magnet 8 along a negative Z-axis direction) beyond a preset angle, the keyboard of this embodiment confirms that the corresponding keycap is pressed once, and the preset angle may be specifically selected according to a sensitivity requirement for detection of a pressing action, which is not described herein again; alternatively, in other embodiments of the present invention, it is also possible to confirm that the key cap is pressed when the magnetic angle sensor 9 detects that the permanent magnet 8 rotates to a preset position/angle along the preset rotation direction, where the preset position/angle may be, for example, the position/angle of the permanent magnet 8 when the corresponding key shaft 3 is located at the Z-axis negative end of the sliding stroke.

In addition, the transmission from the moving part to the rotating part is realized by matching the spiral guide rail and the guide part, so that the proportional relation between the moving stroke of the moving part and the rotating stroke of the rotating part can be adjusted by only adjusting the screw pitch of the spiral guide rail, and the two-stroke proportional relation is adjusted without causing obvious change of the volume/size of the key 2000, so that the screw pitch of the spiral guide rail can be set to the maximum extent by aiming at ensuring the pressing flexibility of the key 2000, the key 2000 is not required to be increased in volume/size due to worry, and the requirement of a keyboard for the size of the key 2000 is favorably met.

In addition, because this embodiment is compared in that permanent magnet 8 is placed at the axle in magnetic angle sensor 9, and under the circumstances of rotating member and moving member direct drive, still can locate same circuit board 1000 with each magnetic angle sensor 9, make the magnetic angle sensor 9 of this embodiment can choose the magnetic angle sensor 9 in the ordinary magnetism knob for use on the one hand, be favorable to promoting magnetic angle sensor 9's commonality, on the other hand, be favorable to simplifying the transmission structure of key axle 3 to permanent magnet 8, be favorable to promoting button 2000's flexibility, on the other hand again, because each magnetic angle sensor 9 can locate same circuit board 1000, therefore need not set up circuit board 1000 alone for every button 2000, be favorable to simplifying the structure of circuit board 1000, be favorable to simplifying the structure of keyboard, be favorable to promoting the economic nature of keyboard.

Specifically, the magnetic angle sensor 9 of the present embodiment is a tunneling magnetoresistance effect sensor (TMR) having a tunneling magnetoresistance sensing element, and the tunneling magnetoresistance effect sensor has a characteristic of low power consumption, so that the keyboard is not prone to generate excessive heat even after being continuously used for a long time, and the keyboard does not cause an excessive temperature rise; of course, the magnetic angle sensor 9 may also have an anisotropic magnetoresistive sensing element and a giant magnetoresistive sensing element, which do not cause the keyboard to be excessively heated.

The spiral guide rail of the embodiment is arranged on the moving piece, and the guide part is arranged on the rotating piece; alternatively, in other embodiments of the present invention, the spiral guide may be provided to the rotary member and the guide may be provided to the moving member.

The permanent magnet 8 of this embodiment is located in the second installation cavity 2001, and the distance from the permanent magnet 8 to the corresponding magnetic angle sensor 9 may be relatively long, alternatively, in other embodiments of the present invention, the first shaft section 181 may also be extended to the Z-axis negative side of the frame body 2, and the permanent magnet 8 is fixedly disposed at the Z-axis negative end of the first shaft section 181, which is beneficial to making the distance between the permanent magnet 8 and the corresponding magnetic angle sensor 9 closer, so that the permanent magnet 8 of this embodiment may be selected with a smaller magnetic field strength, which is beneficial to reducing the interference magnetic field of each permanent magnet 8 on the same keyboard to other magnetic angle sensors 9, and is beneficial to improving the accuracy of the movement detection of the permanent magnet 8 by the magnetic angle sensor 9, and of course, the permanent magnet 8 may also be a disk-shaped magnet, a bar-shaped magnet, or other shaped magnets.

The spiral groove 171 of this embodiment has two spiral surfaces (i.e., a Z-axis positive side spiral surface and a Z-axis negative side spiral surface, which are examples of the first spiral surface and the second spiral surface of the present invention) disposed opposite to each other, one of the spiral surfaces is inclined upward, the other spiral surface is inclined downward, and the convex pillar 184 is fitted between the two spiral surfaces, so that the rotary member can be driven to rotate by an acting force between the convex pillar 184 and the spiral surfaces no matter the key shaft 3 is pressed down or rebounded (returned); alternatively, in other embodiments of the present invention, the spiral guide may have only a spiral surface (Z-axis forward side spiral surface) inclined downward, and the fitting of the frame body 2 to the rotary member is provided with a pre-tensioned torsion spring, the extended locus of the helicoid is set with reference to the extended locus of the spiral groove 171 of the present embodiment, under the action of the pre-tightening torsion spring, the convex column 184 is abutted with the corresponding spiral surface, so that when a user presses the key cap along the Z axis in the negative direction, the pressing force overcomes the elasticity of the spiral pressure spring 19 and the pre-tightening torsion spring, so that the keycap, the key shaft 3, the connecting plate 16 and the transmission cylinder 17 work in the negative direction of the Z axis, and the rotating piece rotates at the same time, after the pressing force is removed, the rotating piece returns to rotate under the action of the pre-tightening torsion spring until the connecting plate 16 is abutted against the Z-axis negative side wall of the cover body 1, so that the convex column 184 is always abutted against the corresponding spiral surface; similarly, in other embodiments of the present invention, the spiral guide rail may only have an upward inclined spiral surface, and the frame 2 is provided with a pre-tightening torsion spring in cooperation with the rotating element, the extending track of the spiral surface is set with reference to the spiral groove 171 of this embodiment, and under the action of the pre-tightening torsion spring, the spiral surface abuts against the corresponding protruding pillar 184, so that when a user presses the keycap in the negative direction along the Z axis, the rotating element rotates under the action of the pre-tightening torsion spring, and after the pressing force of the user is cancelled, the spiral pressure spring 19 overcomes the elastic force of the pre-tightening torsion spring, and forces the keycap, the key shaft 3, the connecting plate 16 and the transmission cylinder 17 to return to the positive direction of the Z axis, and forces the rotating element to rotate to return; of course, the spiral guide rail preferably adopts the spiral groove 171 of this embodiment, so that it is not necessary to provide the pre-tightening torsion spring and the spiral compression spring 19 at the same time, but only one of the pre-tightening torsion spring and the spiral compression spring 19 may be provided, which is beneficial to simplifying the structure of the key 2000 and the structure of the keyboard.

Finally, it should be emphasized that the above-described preferred embodiments of the present invention are merely examples of implementations, rather than limitations, and that many variations and modifications of the invention are possible to those skilled in the art, without departing from the spirit and scope of the invention.

Claims

1. The key comprises a base body and a moving part movably arranged on the base body along a preset track, wherein a pressing part of the key is positioned on the moving part;

the method is characterized in that:

the magnetic angle sensor is fixedly arranged on the base body, the rotation axis of the rotating piece is arranged along a first direction, the preset track extends along the first direction, the moving piece and the rotating piece are in transmission connection through the matching of a spiral guide rail and a guide part, the guide part is movable along the spiral guide rail, two ends of the spiral guide rail along the first direction are a first end and a second end respectively, and the spiral guide rail extends to the second end from the first end in a spiral mode around the axis of the rotating piece;

the spiral guide rail is positioned on the rotating part, and the guide part is positioned on the moving part; and/or the spiral guide rail is positioned on the moving part, and the guide part is positioned on the rotating part;

the rotating member has a permanent magnet, and the magnetic angle sensor is used to detect rotation of the permanent magnet.

2. The key of claim 1, wherein:

the spiral guide rail and the guide part are matched in number of at least two groups distributed along the circumferential direction of the rotating piece.

3. The key of claim 1, wherein:

the magnetic angle sensor comprises a magnetoresistive sensing element;

the magnetic angle sensor is positioned on one side of the rotating member in the first direction;

the distribution directions of the south pole and the north pole of the permanent magnet are perpendicular to the first direction, and the rotating axis of the rotating piece passes through the center of the permanent magnet and passes through the magnetic angle sensor.

4. The key of claim 1, wherein:

one of the rotating part and the moving part is provided with a transmission cylinder, and the other one is provided with a transmission shaft, and the transmission cylinder is sleeved on the periphery of the transmission shaft;

the transmission cylinder is circular in cross-sectional inner contour shape along the first direction, the transmission shaft is circular in cross-sectional inner contour shape along the first direction, and the transmission cylinder is rotatably and slidably matched with the transmission shaft.

5. The key of claim 4, wherein:

the spiral guide rail is arranged on the wall of the transmission cylinder, and the guide part extends from the transmission shaft to the spiral guide rail; or the spiral guide rail is arranged on the transmission shaft, and the guide part extends to the spiral guide rail from the transmission cylinder.

6. The key of claim 1, wherein:

the moving part is kept at an initial position under the action of the pre-tightening return part; and when the moving element leaves the initial position along the preset track, the acting force of the pre-tightening return element tends to force the moving element to return to the initial position along the preset track.

7. The key of claim 6, wherein:

the spiral guide rail comprises a spiral surface which inclines towards the first direction, and the spiral surface is abutted to the guide part under the action of the pre-tightening return piece.

8. The key of any one of claims 1-6, wherein:

the spiral guide rail comprises a spiral groove, the spiral groove is provided with a first spiral surface and a second spiral surface which are arranged oppositely, the first spiral surface and the second spiral surface extend spirally around the axis of the rotating piece, and the guide part is matched between the corresponding first spiral surface and the corresponding second spiral surface along the first direction.

9. Keyboard, its characterized in that:

comprising a key as claimed in any one of claims 1 to 8.

10. The keyboard of claim 9, wherein:

the keyboard is provided with a circuit board, the number of the keys is multiple, the rotating parts are located on the same side of the circuit board in the thickness direction, and the magnetic angle sensors are arranged on the circuit board;

the first direction is along a thickness direction of the circuit board.