CN219512994U - Thin magnetic induction key structure - Google Patents

Abstract

The utility model aims to provide a thin magnetic induction key structure which has a compact structure, can set a trigger stroke according to user preference and has better hand feeling. The utility model comprises a key cap, a telescopic spring, a scissor leg support, a base and a circuit board which are arranged from top to bottom, wherein the scissor leg support comprises an inner support and an outer support which are hinged with each other, the telescopic spring is arranged on the base and props against the key cap, two ends of the inner support are provided with magnets and a fixed shaft, the circuit board is provided with a Hall IC matched with the magnets, the fixed shaft is sleeved with a torsion spring, a short torsion arm of the torsion spring is attached to the side wall of the inner support, a long torsion arm of the torsion spring is in snap fit with a spring arranged on the inner support, and the lower end of the key cap is provided with a boss matched with the long torsion arm. The utility model can be applied to the technical field of keys.

Description

Thin magnetic induction key structure

Technical Field

The utility model relates to the technical field of keys, in particular to a thin magnetic induction key structure.

Background

The keyboard is a typical input device of electronic products such as computers, notebook computers, mobile phones and the like, and along with the continuous development of message technology, the key structure on the keyboard also shows the development of various flowers according to different requirements of different people. A key is provided with a magnet and a Hall IC in structural design, the change of a magnetic field of the magnet is detected through the Hall IC, and detected data are transmitted to a computer. The operator of the keyboard can set the stroke, speed and time of key response by adopting special computer software according to personal operation habit and use requirement, and meanwhile, the thick hand feeling of the mechanical keyboard is maintained. This type of keyboard is highly appreciated by users with special needs and by players of a wide variety of games.

Most of key structures of notebook keyboards and light and thin keyboards commonly used in the market at present adopt a mode of combining a scissor structure with silica gel as an elastic element, for example, the key structure of the scissor keyboard disclosed in the utility model patent with publication number of CN104851728B adopts the elastic element to provide elasticity for the scissor so as to realize resetting and facilitate key actions. The structure is light enough, but the structure cannot be produced in a shaft body mode, and the hand feeling curve is nonlinear and is greatly different from the hand feeling of a traditional mechanical shaft, so that the requirements of game lovers or keyboard users with high hand feeling requirements cannot be met.

In order to cope with the above situation, the utility model provides a thin magnetic induction key structure, which uses the combination of torsion springs and springs to replace the silica gel used by the traditional light and thin keyboard, thereby realizing the hand feeling of a mechanical shaft.

Disclosure of Invention

The utility model aims to solve the technical problem of overcoming the defects of the prior art and providing a thin magnetic induction key structure which has compact structure, can set a trigger stroke according to user preference and has better hand feeling.

The technical scheme adopted by the utility model is as follows: the utility model comprises a key cap, an elastic piece, a scissor leg support, a base and a circuit board, wherein the key cap, the elastic piece, the scissor leg support, the base and the circuit board are arranged from top to bottom, the scissor leg support comprises an inner support and an outer support which are hinged with each other, the right end of the inner support and the left end of the outer support are arranged on a lower buckle positioned on the base, the key cap is arranged on the left end of the inner support and the right end of the outer support, the elastic piece is a telescopic spring, the telescopic spring is arranged on the base, the upper end of the telescopic spring penetrates through the scissor leg support and is propped against the key cap, the left end and the right end of the inner support are respectively provided with a magnet and a fixed shaft, the circuit board is provided with a Hall IC matched with the magnet, the fixed shaft is sleeved with a torsion spring, the short torsion arm of the torsion spring is matched with the side wall of the inner support, the long torsion arm of the torsion spring is matched with the spring buckle arranged on the inner support, and the lower end of the key cap is provided with a boss matched with the long torsion arm; when the key cap moves downwards, the boss presses the long torque arm to enable the long torque arm to move downwards and enable the long torque arm to move along the lower edge of the boss when moving downwards, when the key cap moves downwards to a set height, the long torque arm gets rid of the pressing of the boss and resets to bounce upwards to collide with the spring buckle, and meanwhile the Hall IC detects the magnetic field of the magnet to trigger an input instruction.

Further, the middle part of inner support has been seted up through the square groove, the left cell wall through the square groove is provided with fixed frame, magnet sets up on the fixed frame, the spring buckle sets up the rear side upper end of fixed frame, the rear side lower extreme of fixed frame is provided with leads smooth muscle, it is located to lead smooth muscle the below of long torque arm, one side of fixed axle be provided with short torque arm matched with spacing barricade.

Further, a magnet groove matched with the magnet is formed in the fixing frame, limiting ribs are arranged at the lower end of the magnet groove, and magnet buckles are arranged on two sides of the magnet groove.

Further, the torsion spring comprises an integrally formed spiral section, a long torque arm and a short torque arm, a spiral hole formed by the spiral of the spiral section is matched with the fixed shaft, and an included angle alpha between the long torque arm and the short torque arm is an acute angle.

Further, the two ends of the inner support are provided with center shafts, the two sides of the outer support are provided with shaft holes, and the inner support and the outer support are in hinged fit with the shaft holes through the center shafts.

Further, be provided with the heavy platform of spring on the base, the lower extreme of extension spring with the heavy platform adaptation of spring, the both sides of heavy platform of spring are equipped with the locating hole, still offer on the base and give way the mouth with the cooperation of hall IC.

Further, an avoidance hole is formed in the circuit board and located under the spring sinking table.

Further, be provided with a plurality of buckles down on the base, the lower extreme of key cap is provided with a plurality of buckles, scissors foot support is through last buckle with buckle connection installation down.

The beneficial effects of the utility model are as follows: according to the utility model, the telescopic spring is adopted to reset the keycaps, so that the scissor leg support can also reset, and after the keycaps are arranged on the scissor leg support, the compression of the telescopic spring brings pre-pressure to the keycaps to provide upward component force for the keycaps, so that the scissor leg support is pulled up; when the key cap is pressed, as the pressing force is increased, the compression degree of the telescopic spring is also increased, and the elasticity of the telescopic spring to the key cap is increased, so that a larger pressing hand feeling is obtained; when the key cap is pressed down to a certain degree, a boss on the key cap can squeeze a long torque arm of the torsion spring, and when the boss is squeezed to a critical point, the long torque arm can slide out from the bottom of the boss to strike a spring buckle on an inner support of the scissor leg support, so that a section sense and impact sound occur; after the impact, the key cap is continuously pressed, the elastic force of the telescopic spring is continuously increased until the key cap releases the fingers after reaching the maximum stroke, the elastic force of the telescopic spring pushes the key cap upwards, the key cap pulls up the scissor support for the upward component force of the scissor support, when the key cap returns to the point where the sectional sense occurs, the long torque arm lacks the extrusion of the key cap, and returns to the original position, so that the mechanical shaft hand feeling different from the nonlinear hand feeling of the key of the traditional light and thin keyboard is finally obtained. Under the normal state of no pressing, the magnet keeps the relative distance with the Hall IC on the circuit board, at this moment, the magnetic field detected by the Hall IC is relatively weak, the functional status of the key at this moment is defined as being disconnected through the circuit and software on the keyboard, after the key cap is pressed for a certain distance, the distance between the magnet and the Hall IC is reduced, the magnetic field detected by the Hall IC is enhanced at this moment, and the functional status of the key can be defined as being conducted through the circuit and software on the keyboard, so that a user can adjust the conducting stroke according to preference. Therefore, the utility model has compact whole structure, can set the trigger stroke according to the hobbies of the user, has better use hand feeling, and can meet the demands of game hobbyists or keyboard users with higher hand feeling requirements.

Drawings

FIG. 1 is an exploded view of the present utility model;

FIG. 2 is a schematic perspective view of a key cap according to the present utility model;

FIG. 3 is a schematic perspective view of the inner bracket according to the present utility model;

FIG. 4 is a schematic perspective view of the outer bracket according to the present utility model;

FIG. 5 is a schematic plan view of the torsion spring of the present utility model;

FIG. 6 is a schematic plan view of an elastic member according to the present utility model;

FIG. 7 is a schematic perspective view of a base plate according to the present utility model;

FIG. 8 is a schematic diagram of the motion of the long torque arm of the present utility model;

FIG. 9 is a schematic view of the location of the elastic member according to the present utility model;

FIG. 10 is a schematic view of the position of the torsion spring of the present utility model;

fig. 11 is a schematic view of the positions of the magnet and the hall IC according to the present utility model.

Detailed Description

As shown in fig. 1 to 11, in the present embodiment, the present utility model includes a key cap 1, an elastic member 2, a scissors stand 3, a base 4 and a circuit board 5 arranged from top to bottom, the scissors stand 3 including an inner stand 31 and an outer stand 32 hinged to each other, so that deformation is possible; the right end of the inner bracket 31 and the left end of the outer bracket 32 are mounted on the lower buckle 6 positioned on the base 4, and the key cap 1 is mounted on the left end of the inner bracket 31 and the right end of the outer bracket 32, so that the key cap 1 can move up and down relative to the base 4 to realize a pressing effect; the elastic piece 2 is a telescopic spring, the telescopic spring is arranged on the base 4, the upper end of the telescopic spring penetrates through the scissor leg support 3 and abuts against the keycap 1, so that the keycap 1 has a reset effect, and the use requirement is met; the left end and the right end of the inner bracket 31 are respectively provided with a magnet 7 and a fixed shaft 8, the circuit board 5 is provided with a Hall IC9 matched with the magnet 7, the magnet 7 changes the distance between the magnet 7 and the Hall IC9 along with the movement of the key cap 1, so that the magnetic field intensity which can be detected by the Hall IC9 changes, and whether an instruction is triggered or not is determined according to the change, so that the adjustable function is realized; the fixed shaft 8 is sleeved with a torsion spring 10, a short torsion arm 102 of the torsion spring 10 is attached to the side wall of the inner support 31, a long torsion arm 101 of the torsion spring 10 is matched with a spring buckle 11 arranged on the inner support 31, a boss 12 matched with the long torsion arm 101 is arranged at the lower end of the key cap 1, the boss 12 can enable the long torsion arm 101 to deform and generate a knocking sound when being matched with the spring buckle 11 in use, and meanwhile the key cap 1 is pressed to have a paragraph sense;

when the key cap 1 moves downwards, the boss 12 presses the long torque arm 101 to enable the long torque arm 101 to move downwards, the long torque arm 101 moves along the lower edge of the boss 12 while moving downwards, and when the key cap 1 moves downwards to a set height, the long torque arm 101 gets rid of the pressing of the boss 12 and returns to be sprung upwards to collide with the spring buckle 11 to generate a knocking sound, and meanwhile, the pressing has a paragraph feel; in addition, the hall IC9 detects that the magnetic field of the magnet 7 increases, reaches a set strength, and triggers an input command.

As shown in fig. 3, in this embodiment, a square through slot 13 is formed in the middle of the inner bracket 31, and the square through slot 13 is used for yielding, so that components such as the expansion spring can be smoothly installed and used, and interference is avoided; the left groove wall of the square groove 13 is provided with a fixed frame 14, the magnet 7 is arranged on the fixed frame 14, the spring buckle 11 is arranged at the upper end of the rear side of the fixed frame 14, the lower end of the rear side of the fixed frame 14 is provided with a sliding guide rib 15, and a gap is reserved between the spring buckle 11 and the guide inclined block, so that the boss 12 can move downwards; the sliding guide bar 15 is located below the long torque arm 101, when the boss 12 presses the long torque arm 101 to move downwards, the long torque arm 101 moves downwards and backwards under the guiding action of the guiding oblique block, so that the long torque arm gradually breaks away from the pressing of the boss 12, and finally bounces upwards and knocks on the lower end of the spring buckle 11; a limiting retaining wall 16 matched with the short torque arm 102 is arranged on one side of the fixed shaft 8, when the torsion spring 10 is sleeved on the fixed shaft 8, the long torque arm 101 is positioned at the lower end of the spring buckle 11, and the short torque arm 102 is positioned at the lower end of the rear side of the limiting retaining wall 16, so that limiting is realized, and separation is avoided;

as shown in fig. 1 and 8, when the key is pressed, the key cap 1 moves downward, the reaction torque of the torsion spring 10 gradually increases, and the long torque arm 101 moves downward and also moves in the X-axis direction under the action of the acting force of the boss 12 and the guide inclined block on the inner bracket 31; when the long torque arm 101 moves from point a to point B, the boss 12 loses constraint on the long torque arm 101. Under the torsion force of the torsion spring 10, the long torsion arm 101 rapidly springs upwards; at this time, the resultant force of the reaction of the torsion spring 10 to the key cap 1 is rapidly reduced, and a remarkable sectional feeling is generated. When the long torque arm 101 moves from the point B to the point C rapidly, the long torque arm 101 rapidly collides with the spring buckle 11 to generate mechanical sound of the rod;

when the key cap 1 moves downwards, the magnet 7 moves downwards at the same time, along with the shortening of the distance between the magnet 7 and the Hall IC9, the magnetic field detected by the Hall IC9 is gradually enhanced, the magnetic field change collected by the Hall IC9 is graded by software, and a user can define the conducting stroke of a key by himself, so that the input of a key function is realized;

when the pressing of the key cap 1 is removed, the key cap 1 is jacked up under the action of the elasticity of the telescopic spring and the torsion spring 10, the scissor leg support 3 is pulled into an X shape by the key cap 1, and the whole key structure is reset to finish one-time input. The long torque arm 101 is also reset by point C-point B-point a under the action of the sloped wall on the boss 12.

In this embodiment, the fixing frame 14 is provided with a magnet slot 17 adapted to the magnet 7, a limit rib 18 is disposed at the lower end of the magnet slot 17, and magnet buckles 19 are disposed on two sides of the magnet slot 17. The magnet 7 is placed in the magnet groove 17, the limit rib 18 is used for supporting the magnet 7 so as not to fall from the lower end, and the magnet buckle 19 is used for limiting the upper part of the magnet 7, so that the magnet 7 is fixed in the magnet groove 17.

As shown in fig. 5, in this embodiment, the torsion spring 10 includes an integrally formed spiral section 103, the long torque arm 101, and the short torque arm 102, a spiral hole 104 formed by spiral of the spiral section 103 is adapted to the fixed shaft 8, and an included angle α between the long torque arm 101 and the short torque arm 102 is an acute angle. The spiral hole 104 is sleeved on the fixed shaft 8; the function of the angle α is to make the short torque arm 102 abut against the bottom of the limit retaining wall 16 and the included angle of the inner bracket 31, and make the long torque arm 101 abut against the bottom of the spring buckle 11 and the included angle of the inner bracket 31, which is designed to prevent the torsion spring 10 from shaking. The torsion spring 10 is made of spring steel and can be adsorbed with the magnet 7.

In this embodiment, the two ends of the inner support 31 are respectively provided with a central shaft 20, two sides of the outer support 32 are respectively provided with a shaft hole 21, and the inner support 31 and the outer support 32 are hinged and matched with the shaft holes 21 through the central shafts 20, so that the inner support 31 and the outer support 32 can rotate relatively.

In this embodiment, the base 4 is provided with a spring sinking platform 22 for fixing and storing the telescopic spring, so as to avoid movement thereof; the lower end of the telescopic spring is matched with the spring sinking platform 22; positioning holes 23 are formed in two sides of the spring sinking table 22, and the positioning holes 23 are used for fixing a jig to assist in forming the spring sinking table 22; the base 4 is also provided with a yielding port 24 matched with the Hall IC9, and the yielding port 24 is used for yielding the Hall IC9 to avoid motion interference.

In this embodiment, the circuit board 5 is provided with a relief hole 25, and the relief hole 25 is located directly below the spring sinking platform 22. The avoidance holes 25 are used for avoiding the spring sinking platform 22, and can play a role in positioning the spring sinking platform 22.

In this embodiment, a plurality of lower buckles 6 are provided on the base 4, a plurality of upper buckles 26 are provided at the lower end of the keycap 1, and the scissor leg support 3 is connected and installed through the upper buckles 26 and the lower buckles 6.

When the utility model is applied, the telescopic spring is fixed at the spring sinking table 22 of the base 4, and after the key cap 1 is arranged on the scissor leg support 3, the scissor leg support 3 is pulled up by providing upward component force for the key cap 1 due to the precompression of the telescopic spring brought to the key cap 1, and the scissor leg support 3 rotates around the central shaft 20 to form an X shape. When the key cap 1 is pressed, as the pressing force increases, the degree to which the expansion spring is compressed also increases, and the elastic force of the expansion spring to the key cap 1 increases to obtain a larger pressing feeling. When the key cap 1 is pressed down to a certain extent, the boss 12 on the key cap 1 presses the long torque arm 101 of the torsion spring 10, and when the long torque arm 101 is pressed to a critical point, the long torque arm 101 slides out from the bottom of the boss 12 to strike the bottom of the spring buckle 11, so that paragraph sense and impact sound occur. After the impact, the key cap 1 is continuously pressed, the elastic force of the telescopic spring is continuously increased until the key cap 1 reaches the maximum stroke and then the fingers are released, the elastic force of the telescopic spring pushes the key cap 1 upwards, the key cap 1 pulls up the scissor support 3 for the upward component force of the scissor support 3, and when the key cap returns to the point where the sectional sense occurs, the long torque arm 101 lacks the boss 12 to be extruded, and the bottom of the rebound spring buckle 11 is re-slid. Finally, the mechanical axis hand feeling different from the nonlinear hand feeling of the traditional light and thin keyboard keys is obtained.

In a normal non-pressed state, the magnet 7 is kept at a relative distance from the hall IC9 on the circuit board 5, and the magnetic field detected by the hall IC9 is relatively weak. The functional status of the key at this time is defined as off by the circuit and software on the keyboard. After the key cap 1 is pressed down by a certain distance, the distance between the magnet 7 and the hall IC9 is reduced, and the magnetic field detected by the hall IC9 is enhanced. The function status of the key can be defined as on by the optional magnetic field intensity in the detected magnetic field change process through the circuit and software on the keyboard.

While the embodiments of this utility model have been described in terms of practical aspects, they are not to be construed as limiting the meaning of this utility model, and modifications to the embodiments and combinations with other aspects thereof will be apparent to those skilled in the art from this description.

Claims (8)

1. The utility model provides a slim magnetic induction button structure, it includes key cap (1), elastic component (2), scissors foot support (3), base (4) and circuit board (5) that set up from top to bottom, scissors foot support (3) are including looks articulated inner support (31) and outer support (32), the right-hand member of inner support (31) with the left end of outer support (32) is installed on being located lower buckle (6) on base (4), key cap (1) are installed the left end of inner support (31) with on the right-hand member of outer support (32), its characterized in that: the elastic piece (2) is an extension spring, the extension spring is arranged on the base (4) and the upper end of the extension spring penetrates through the scissor support (3) and is propped against the keycap (1), the left end and the right end of the inner support (31) are respectively provided with a magnet (7) and a fixed shaft (8), the circuit board (5) is provided with a Hall IC (9) matched with the magnet (7), the fixed shaft (8) is sleeved with a torsion spring (10), a short torsion arm (102) of the torsion spring (10) is attached to the side wall of the inner support (31), a long torsion arm (101) of the torsion spring (10) is matched with a spring buckle (11) arranged on the inner support (31), and a boss (12) matched with the long torsion arm (101) is arranged at the lower end of the keycap (1). When the key cap (1) moves downwards, the boss (12) presses the long torque arm (101) to enable the long torque arm (101) to move downwards and enable the long torque arm (101) to move along the lower edge of the boss (12) while moving downwards, when the key cap (1) moves downwards to a set height, the long torque arm (101) gets rid of the pressing of the boss (12) and returns to bounce upwards to collide with the spring buckle (11), and meanwhile the Hall IC (9) detects the magnetic field of the magnet (7) to trigger an input instruction.

2. The thin magnetically inductive key structure of claim 1, wherein: the middle part of inner support (31) has been seted up through square groove (13), the left cell wall through square groove (13) is provided with fixed frame (14), magnet (7) set up on fixed frame (14), spring buckle (11) set up the rear side upper end of fixed frame (14), the rear side lower extreme of fixed frame (14) is provided with leads smooth muscle (15), lead smooth muscle (15) to be located the below of long torque arm (101), one side of fixed axle (8) be provided with short torque arm (102) matched with spacing barricade (16).

3. The thin magnetically inductive key structure of claim 2, wherein: the magnet fixing device is characterized in that a magnet groove (17) matched with the magnet (7) is formed in the fixing frame (14), limiting ribs (18) are arranged at the lower end of the magnet groove (17), and magnet buckles (19) are arranged on two sides of the magnet groove (17).

4. The thin magnetically inductive key structure of claim 1, wherein: the torsion spring (10) comprises a spiral section (103) which is integrally formed, a long torque arm (101) and a short torque arm (102), a spiral hole (104) which is formed by the spiral of the spiral section (103) is matched with the fixed shaft (8), and an included angle alpha between the long torque arm (101) and the short torque arm (102) is an acute angle.

5. The thin magnetically inductive key structure of claim 1, wherein: the two ends of the inner support (31) are respectively provided with a central shaft (20), the two sides of the outer support (32) are respectively provided with a shaft hole (21), and the inner support (31) and the outer support (32) are in hinged fit with the shaft holes (21) through the central shafts (20).

6. The thin magnetically inductive key structure of claim 1, wherein: the base (4) is provided with a spring sinking table (22), the lower end of the telescopic spring is matched with the spring sinking table (22), positioning holes (23) are formed in two sides of the spring sinking table (22), and the base (4) is also provided with a yielding port (24) matched with the Hall IC (9).

7. The thin magnetically inductive key structure of claim 6, wherein: the circuit board (5) is provided with an avoidance hole (25), and the avoidance hole (25) is positioned right below the spring sinking table (22).

8. The thin magnetically inductive key structure of claim 1, wherein: be provided with a plurality of down buckle (6) on base (4), the lower extreme of key cap (1) is provided with a plurality of last buckles (26), scissors foot support (3) are through last buckle (26) with down buckle (6) connect the installation.