Mechanical key cap and thin film touch module integrated composite key structure and keyboard

Abstract

The application discloses a composite key structure integrating a mechanical key cap and a thin film touch module, comprising a plurality of composite keys arranged on a keyboard main body, each composite key comprising a key cap, a shaft core, a pressure equalizing disc, a silica gel drum, a conductive film and a compression drum assembly, the conductive film being provided with a trigger point corresponding to the silica gel drum, and the silica gel drum being internally provided with a first trigger part. The compression drum assembly comprises a compression drum membrane and a connecting head, the connecting head being threadedly connected with the pressure equalizing disc and being adjusted through a transmission shaft penetrating the shaft core; when the silica gel drum elastically attenuates, the compression drum membrane can extend and unfold to adhere to the inner wall of the silica gel drum, thereby forming elastic compensation for the silica gel drum, and a second trigger part in the compression drum membrane and the first trigger part jointly act on the trigger point. The structure can improve the problems of insufficient rebound and trigger failure caused by aging of the silica gel drum, improve the key trigger sensitivity, reset performance and service life, and facilitate individual adjustment and maintenance.

Description

Technical Field

[0001] This invention relates to the field of keyboards, and more specifically to a composite key structure that integrates mechanical keycaps with a membrane touch module. Background Technology

[0002] Currently, keyboards, as commonly used human-computer interaction input devices in computers, smart terminals, and industrial control equipment, mainly fall into two categories in terms of key structure: mechanical key structure and membrane key structure. Mechanical keys typically use an independent mechanical switch as the trigger core, achieving pressing feedback through internal springs, metal contacts, and other structures. They offer advantages such as a distinct pressing travel, clear tactile feedback, and a long service life. However, mechanical keys have a complex structure, a large number of parts, and a relatively thick overall build, resulting in higher manufacturing costs and hindering the development of thinner and lower-cost keyboard products.

[0003] Membrane key structures typically use a silicone drum and a conductive film to trigger the key. The basic principle is that when a user presses a keycap, the key support structure drives the silicone drum to elastically compress, causing the contact portion inside the drum to move downwards and make contact with the trigger point on the conductive film, thus completing the electrical signal conduction. This type of structure has advantages such as simple structure, easy assembly, low manufacturing cost, and small overall thickness, and is therefore widely used in laptop keyboards, office keyboards, and various embedded input devices.

[0004] However, existing membrane button structures still have certain drawbacks. The silicone drum, as the core elastic component for button reset and triggering, must withstand repeated compression, release, and deformation recovery during long-term use. Especially in high-frequency button operation scenarios, the silicone material is prone to elasticity decay, permanent deformation, and localized fatigue cracking due to long-term mechanical fatigue. When the silicone drum's elasticity decreases, it cannot provide sufficient rebound force to drive the button reset in time, resulting in reduced rebound speed, altered tactile feel, and increased triggering pressure. Furthermore, when the internal structure of the silicone drum deforms, the contact position between its internal contacts and the trigger point on the conductive film may shift, causing the button to become unresponsive, experience intermittent failures, or even become unresponsive.

[0005] In existing technologies, when the silicone drum in a membrane keyboard exhibits the aforementioned aging or damage issues, it is typically necessary to disassemble the entire keyboard module and replace the corresponding silicone drum assembly, or replace the entire keyboard assembly. However, since the silicone drum is usually installed in combination with the membrane circuit layer, keyboard frame, and other structures, replacing the silicone drum separately is complex and difficult to repair; while replacing the entire keyboard module increases repair costs and reduces the maintainability of the device.

[0006] Furthermore, traditional membrane buttons rely solely on the elasticity of the silicone drum itself for reset and actuation pressure maintenance. When the performance of the silicone drum deteriorates, there is no additional auxiliary elastic compensation structure, making it impossible to actively compensate for performance degradation due to drum aging. Even adding auxiliary structures such as mechanical springs easily complicates the button structure, increases installation space, and fails to effectively solve the problem of decreased actuation accuracy caused by deformation of the internal actuation area of ​​the silicone drum.

[0007] Therefore, how to provide a composite button structure that can maintain stable triggering performance after long-term use of the silicone drum, while compensating for the elastic decay of the silicone drum and improving the reliability and service life of the button has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0008] To address the aforementioned problems, this invention provides a composite key structure that integrates mechanical keycaps with a membrane touch module, effectively overcoming the shortcomings of existing technologies.

[0009] This invention is achieved through the following technical solution: a composite key structure integrating mechanical keycaps and a membrane touch module, comprising multiple composite keys mounted on a keyboard frame, each composite key including: The keyboard is mounted on the keycaps and the key stem, which is installed in the key slot of the keyboard frame. Pressing the keyboard causes the key stem to move downward. A pressure equalizing plate is installed at the bottom of the spindle core, and its outer edge is slidably fitted with the keyboard frame. The pressure equalizing plate is driven to move up and down by the spindle core. A silicone drum is installed at the bottom of the equalizing plate; A conductive film and a PCB circuit board, wherein the conductive film covers the PCB board and a trigger point is provided on the conductive film corresponding to the position of each silicone drum; A first trigger part is provided on the silicone drum at the position corresponding to the trigger point. The first trigger part is hollow inside, and a trigger surface is formed at the bottom of the first trigger part. A compression drum assembly is installed at the bottom of the equalizing plate, and the compression drum assembly is located in the hollow area inside the first trigger part. When the compression drum assembly extends to the outside of the first trigger part, it recovers its elastic deformation and unfolds to fit the inner wall of the silicone drum.

[0010] As a preferred technical solution, the compression drum assembly includes a compression diaphragm and a connector. The top of the compression diaphragm forms a protrusion and is snapped into the connector. After the compression diaphragm is unfolded, its inner wall can fit into the inside of the silicone drum. The opening direction of the compressed diaphragm is oriented towards the inside.

[0011] As a preferred technical solution, the outer wall of the connector is provided with an external thread, the bottom of the equalizing plate is provided with an internal thread, the connector is installed on the bottom of the equalizing plate by the thread, and the connector is rotated so that the connector gradually extends into the first trigger part.

[0012] As a preferred technical solution, the top of the equalizing plate is provided with a spherical force transmission head, the top of the spherical force transmission head is fixedly connected to the bottom of the shaft core, and the bottom spherical part is embedded in the equalizing plate.

[0013] As a preferred technical solution, a drive shaft is provided through the middle of the shaft core, the bottom of the drive shaft is fixedly connected to the top of the connector, and the drive shaft passes through the spherical force transmission head and the shaft core and extends to the upper end face of the shaft core.

[0014] As a preferred technical solution, the top of the drive shaft forms a screw end, and the knob end is located between the keycap and the shaft core. When operating the drive shaft, the keycap is opened and the drive shaft is rotated.

[0015] As a preferred technical solution, a second trigger part is provided in the middle position inside the compressed diaphragm. The second trigger part is retracted into the compressed diaphragm. When the compressed diaphragm is unfolded and fits against the inner wall of the silicone drum, the bottom surface of the second trigger part is flush with the bottom surface of the first trigger part.

[0016] As a preferred technical solution, the outer wall surface of the equalizing plate is provided with a guide slider, and the inner wall of the keyboard frame is provided with a guide groove corresponding to the guide slider, and the guide slider is slidably disposed in the guide groove.

[0017] As a preferred technical solution, the compressed diaphragm is made of elastic silicone material.

[0018] The present invention provides a mechanical keyboard, comprising a keyboard body and composite keys.

[0019] The beneficial effects of this invention are as follows: By setting a compression drum assembly at the bottom of the equalizing plate and placing the compression drum assembly inside the first trigger part of the silicone drum, after the silicone drum has been used for a long time and its elasticity has decreased or deformed, the compression drum assembly can extend and restore the elastic deformation, so that the compression drum diaphragm unfolds and fits against the inner wall of the silicone drum, thereby forming elastic support compensation for the internal space of the silicone drum, assisting the silicone drum to restore its original elastic state, and avoiding the problems of pressing failure, insufficient rebound and unstable triggering caused by the aging of the silicone drum in traditional membrane buttons.

[0020] This invention features a retractable compression drum assembly that allows for elastic compensation based on the actual condition of the silicone drum. Under normal conditions, the compression diaphragm contracts and hides inside the first trigger section, without affecting the normal operation of the silicone drum. When the elasticity of the silicone drum decreases, the compression diaphragm expands and adheres to the inner wall of the silicone drum, providing auxiliary support and thus extending the effective service life of the silicone drum and improving the overall reliability of the button structure.

[0021] This invention provides a second triggering part inside the compressed diaphragm, which, after the compressed diaphragm expands, works together with the first triggering part to trigger the point. This transforms the button triggering area from a single triggering structure to a composite triggering structure, improving the triggering contact area and triggering stability. Even if the silicone drum undergoes slight deformation, it can still ensure effective contact between the triggering part and the triggering point, thereby improving the button response accuracy.

[0022] This invention adjusts the extension of the compression drum assembly by setting a threaded adjustment structure between the connector and the pressure equalizing plate, and by using a transmission shaft and a screwing end to control the position of the connector. This allows for adjustment of the auxiliary support force according to the aging degree of different silicone drums, thereby improving the adaptability of the button structure.

[0023] The overall structure of this invention still adopts the basic structure of a membrane keyboard, which consists of keycaps, a spindle, a pressure equalizing plate, a silicone drum, and a conductive film. Only a compression drum assembly is added as an elastic compensation mechanism. There is no need to change the triggering method of the existing membrane keyboard. The structure is simple and easy to install. While maintaining the advantages of low cost and thinness of membrane keyboards, it improves the lifespan of keys and triggering reliability, and has good application value. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal three-dimensional cross-section of the composite button of the present invention; Figure 3 This is a schematic diagram of the internal front cross-section of the composite button of the present invention; Figure 4 For the present invention Figure 3 A magnified view of a section at point A in the middle; Explanation of reference numerals in the attached figures: 101. Composite key; 1. Keycap; 3. Switch core; 4. Pressure equalizing plate; 5. Silicone drum; 7. First trigger part; 6. Conductive film; 12. Trigger point; 8. Compression diaphragm; 9. Connector; 10. Spherical force transmission head; 2. Drive shaft; 11. Second trigger part; 100. Keyboard body. Detailed Implementation

[0026] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0027] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features for a similar purpose, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0028] like Figures 1 to 4 As shown, this embodiment provides a composite key structure integrating mechanical keycaps and a membrane touch module, which is applied to the keyboard body 100. The keyboard body 100 includes a keyboard frame, a conductive film 6, and a PCB circuit board. Multiple key slots for mounting keys are spaced apart on the keyboard frame, and each key slot houses a composite key 101. The multiple composite keys 101 are arranged according to the keyboard's key layout and respectively cooperate with corresponding trigger areas on the conductive film 6 to achieve the input of different characters or function commands.

[0029] Each composite key 101 includes a keycap 1, a switch 3, a pressure-equalizing plate 4, a silicone drum 5, and a compression drum assembly. The keycap 1 is mounted on top of the switch 3, and the keycap 1 and the switch 3 are assembled in a detachable manner, allowing the keycap 1 to be removed from the switch 3 to operate the internal adjustment structure of the composite key 101. The switch 3 is installed in the key groove of the keyboard frame in the vertical direction. The key groove provides circumferential limiting and vertical movement guidance for the switch 3, allowing the switch 3 to reciprocate within the key groove in the key pressing direction. When the user presses the keycap 1, the keycap 1 transmits the pressing force to the switch 3, causing the switch 3 to move downward relative to the keyboard frame; when the user releases the keycap 1, the switch 3 returns to its original position under the elastic recovery of the silicone drum 5, and drives the keycap 1 back to the unpressed state.

[0030] The keycap 1 is preferably mounted on the top of the switch core 3 via a plug-in structure. The top of the switch core 3 can be provided with a plug-in post that matches the internal mounting groove of the keycap 1. The plug-in post and the keycap 1 form a detachable interference fit or a snap-fit ​​fit. This structure can ensure that the keycap 1 will not fall off the switch core 3 during normal pressing, and can also be removed when it is necessary to adjust the compression drum assembly, thereby exposing the drive shaft 2 at the upper end of the switch core 3.

[0031] The equalizing plate 4 is installed at the bottom of the shaft core 3 and located between the shaft core 3 and the silicone drum 5. The equalizing plate 4 has a disc-shaped structure, and its lateral dimension is larger than that of the shaft core 3. It is used to convert the concentrated pressing force transmitted by the shaft core 3 into a uniform pressure acting on the top of the silicone drum 5. When the shaft core 3 moves downward, it drives the equalizing plate 4 to descend synchronously. After the equalizing plate 4 descends, it compresses the silicone drum 5 from the top, causing the silicone drum 5 to undergo elastic deformation. By transmitting the pressing force through the equalizing plate 4, the local stress concentration caused by the shaft core 3 directly pressing the silicone drum 5 can be reduced, reducing the possibility of the silicone drum 5 collapsing on one side or suffering local fatigue damage due to eccentric pressure.

[0032] The outer wall of the pressure equalizing plate 4 is provided with a protruding guide slider. The inner wall of the keyboard frame is provided with a guide groove extending in the vertical direction corresponding to the guide slider, and the guide slider is slidably installed in the guide groove. When the pressure equalizing plate 4 moves up and down with the shaft core 3, the guide slider slides synchronously along the guide groove. The guide groove restricts the pressure equalizing plate 4 from lateral displacement or circumferential rotation, so that the pressure equalizing plate 4 is always kept above the silicone drum 5. Multiple guide sliders can be arranged at intervals along the circumference of the pressure equalizing plate 4, and multiple corresponding guide grooves are also provided, so that the pressure equalizing plate 4 can move up and down stably under different pressing positions and different pressing directions.

[0033] A spherical force transmission head 10 is provided on the top of the pressure equalizing plate 4. The top of the spherical force transmission head 10 is fixedly connected to the bottom of the spindle core 3. The bottom of the spherical force transmission head 10 forms a downwardly protruding spherical part. A spherical receiving area is provided on the top of the pressure equalizing plate 4 corresponding to the spherical force transmission head 10. The bottom spherical part of the spherical force transmission head 10 is embedded in the pressure equalizing plate 4 and moves in cooperation with the spherical receiving area. When the spindle core 3 is pressed in the center, the spherical force transmission head 10 transmits vertical downward pressure to the pressure equalizing plate 4. When the spindle core 3 is pressed eccentrically or the edge of the keycap 1 is pressed, the spherical force transmission head 10 can swing slightly relative to the pressure equalizing plate 4, so that the pressure equalizing plate 4 maintains a relatively stable descending posture under the restriction of the guide slider and guide groove. This can reduce the tilting of the pressure equalizing plate 4 caused by eccentric pressing and make the compression force on the silicone drum 5 more uniform.

[0034] The silicone drum 5 is located at the bottom of the pressure equalizing plate 4. The silicone drum 5 is made of silicone material with elastic deformation capabilities, and its main body forms a drum-shaped structure with a raised top and an open bottom. The bottom of the silicone drum 5 is supported above the conductive film 6 or on a support area adjacent to the conductive film 6. When the silicone drum 5 is pressed downwards by the pressure equalizing plate 4, its drum-shaped sidewalls bend and collapse, causing the top of the silicone drum 5 to move towards the conductive film 6. After the external pressure disappears, the drum-shaped sidewalls of the silicone drum 5 return to their original shape due to their own elasticity, and push the pressure equalizing plate 4, the shaft core 3, and the keycap 1 back to their original positions.

[0035] A conductive film 6 covers the PCB circuit board, and trigger points 12 corresponding to multiple composite buttons 101 are provided on the conductive film 6. Each trigger point 12 is located below the corresponding silicone drum 5 and corresponds vertically to the center area of ​​the silicone drum 5. The conductive film 6 may include an upper conductive layer, a spacer layer, and a lower conductive layer, and the trigger points 12 are formed in conductive areas that can be pressed and made conductive. When the silicone drum 5 deforms downward and presses the trigger point 12, the corresponding conductive areas come into contact with each other and generate an electrical signal. The PCB circuit board receives the electrical signal and identifies the input command of the corresponding composite button 101.

[0036] A first trigger part 7 is provided at the position corresponding to the trigger point 12 on the silicone drum 5. The first trigger part 7 is located in the internal central area of ​​the silicone drum 5 and extends downward along the central axis of the silicone drum 5. The interior of the first trigger part 7 forms a hollow area, and its bottom forms a trigger surface facing the trigger point 12. When the composite key 101 is not pressed, a trigger travel gap is maintained between the trigger surface of the first trigger part 7 and the trigger point 12; when the keycap 1 is pressed, the pressure equalizing plate 4 compresses the silicone drum 5, and the first trigger part 7 moves downward with the top of the silicone drum 5 until the trigger surface at the bottom of the first trigger part 7 presses against the trigger point 12, realizing the conduction of the corresponding key circuit.

[0037] The compression drum assembly is installed at the bottom of the equalizing plate 4 and extends into the hollow area inside the first trigger part 7. The compression drum assembly includes a compression diaphragm 8 and a connector 9. The connector 9 is located at the center of the bottom of the equalizing plate 4, and the compression diaphragm 8 is installed at the lower end of the connector 9. The compression diaphragm 8 is made of elastic silicone material, with an upwardly protruding convex part on its top. The bottom of the connector 9 is correspondingly provided with a snap-fit ​​cavity or snap-fit ​​groove. The convex part on the top of the compression diaphragm 8 snaps into the connector 9, so that the compression diaphragm 8 and the connector 9 are reliably connected and can move vertically with the connector 9.

[0038] In its initial state, the compressed diaphragm 8 is compressed and housed within the hollow area inside the first trigger part 7, with its opening facing the internal space of the silicone drum 5. Because the internal space of the first trigger part 7 provides radial constraint to the compressed diaphragm 8, the compressed diaphragm 8, when in its retracted state, does not significantly interfere with the normal elastic deformation of the silicone drum 5. When the elastic performance of the silicone drum 5 is normal, the compressed diaphragm 8 remains in its retracted state, and the composite button 101 primarily relies on the elasticity of the silicone drum 5 itself to complete the pressing trigger and reset.

[0039] The outer wall of the connector 9 is provided with external threads, and the bottom of the equalizing plate 4 is provided with an internal threaded hole that mates with the external threads of the connector 9. The connector 9 is installed on the bottom of the equalizing plate 4 by the threads. When the connector 9 rotates relative to the equalizing plate 4, it moves upward or downward along the axial direction of the equalizing plate 4 under the action of the threaded engagement. When the connector 9 gradually extends downward into the first trigger part 7, the connector 9 drives the compression diaphragm 8 to move outward from the first trigger part 7; when the compression diaphragm 8 is freed from the radial restriction of the hollow area inside the first trigger part 7, the compression diaphragm 8 recovers its deformation by its own elasticity and unfolds outward. The unfolded compression diaphragm 8 fits against the inner wall surface of the silicone drum 5.

[0040] After the compressed diaphragm 8 unfolds, it forms an elastic drum structure with the silicone drum 5, with the compressed diaphragm 8 providing auxiliary support from within the silicone drum 5. When the silicone drum 5 experiences elastic decay, reduced rebound speed, or localized deformation due to long-term repeated compression, the unfolded compressed diaphragm 8 can replenish the elastic recovery force of the silicone drum 5, allowing it to recover its drum shape more quickly after the pressure is released, and pushing the pressure equalizing plate 4, the spindle core 3, and the keycap 1 to return to their original position. The compressed diaphragm 8, after adhering to the inner wall of the silicone drum 5, can also limit irregular collapse of the silicone drum 5, reducing the possibility of the first trigger part 7 shifting relative to the trigger point 12.

[0041] A drive shaft 2 is installed through the middle of the shaft core 3 along the vertical direction, and the bottom of the drive shaft 2 is fixedly connected to the top of the connector 9. The drive shaft 2 passes through the shaft core 3 and the spherical force transmission head 10 in sequence, and extends to the upper end face of the shaft core 3. An axial through hole is provided inside the shaft core 3 corresponding to the drive shaft 2, allowing the drive shaft 2 to rotate within the axial through hole. When the drive shaft 2 rotates, it drives the connector 9 to rotate synchronously. Since the connector 9 and the pressure equalizing plate 4 are threaded together, the connector 9 generates axial displacement relative to the pressure equalizing plate 4 during rotation, thereby causing the compression diaphragm 8 to extend or retract.

[0042] The top of the drive shaft 2 forms a screw end, which is located between the keycap 1 and the core 3. Under normal use, the keycap 1 covers the screw end to prevent accidental operation of the drive shaft 2. When a composite key 101 exhibits insufficient rebound, slow triggering, or unresponsive pressing, the corresponding keycap 1 can be removed from the core 3, exposing the screw end at the top of the drive shaft 2. Then, a tool compatible with the screw end can be used to rotate the drive shaft 2. The drive shaft 2 drives the connector 9 to rotate and move downwards, causing the compressed diaphragm 8 to gradually extend beyond the first trigger part 7 and unfold after losing its circumferential limit. By controlling the rotation angle of the drive shaft 2, the descent distance of the connector 9 and the degree of unfolding of the compressed diaphragm 8 can be adjusted, allowing the compressed diaphragm 8 to provide auxiliary elasticity adapted to the aging degree of the silicone drum 5.

[0043] A second trigger part 11 is provided in the middle of the interior of the compressed diaphragm 8. The second trigger part 11 is integrally formed with or fixedly connected to the compressed diaphragm 8. When the compressed diaphragm 8 is in the retracted state, the second trigger part 11 is retracted into the compressed diaphragm 8 to prevent the second trigger part 11 from prematurely contacting the trigger point 12 during normal use of the silicone drum 5. When the compressed diaphragm 8 extends out of the first trigger part 7 and unfolds to fit against the inner wall of the silicone drum 5, the second trigger part 11 unfolds with the compressed diaphragm 8 to the working position. At this time, the bottom surface of the second trigger part 11 is basically flush with the bottom trigger surface of the first trigger part 7.

[0044] In the compensated state of the compressed diaphragm 8, after the keycap 1 is pressed, the switch core 3 drives the pressure equalizing plate 4 to move downward through the spherical force transmission head 10. The pressure equalizing plate 4 simultaneously presses the silicone drum 5 and the compressed diaphragm 8 located inside the silicone drum 5. The silicone drum 5 and the compressed diaphragm 8 undergo elastic deformation synchronously, causing the first trigger part 7 and the second trigger part 11 to move together towards the trigger point 12. The first trigger part 7 and the second trigger part 11 form a composite trigger structure, which can increase the effective range of action on the trigger point 12. Even if the first trigger part 7 is slightly deflected due to the aging of the silicone drum 5, the second trigger part 11 can still assist in pressing the trigger point 12, thereby improving the trigger reliability of the composite key 101.

[0045] When the composite key 101 is in its normal state, the user presses the keycap 1. The keycap 1 drives the spindle 3 to move downwards along the key groove. The spindle 3 transmits the pressing force to the pressure equalizing plate 4 through the spherical force transmission head 10. The pressure equalizing plate 4 descends smoothly under the constraint of the guide slider and guide groove, applying uniform pressure to the silicone drum 5. After being pressed, the silicone drum 5 elastically collapses, causing the trigger surface at the bottom of the first trigger part 7 to press against the trigger point 12 on the conductive film 6. The conductive film 6 generates a corresponding conduction signal and transmits the signal to the PCB circuit board. After releasing the keycap 1, the silicone drum 5 returns to its original shape, pushing the pressure equalizing plate 4 and the spindle 3 upwards to reset. The first trigger part 7 moves away from the trigger point 12, disconnecting the corresponding key circuit.

[0046] When the silicone drum 5 experiences elastic decay after prolonged use, the user drives the connecting head 9 downwards by rotating the drive shaft 2. The compressed diaphragm 8 gradually extends from inside the first trigger part 7 and unfolds on its own after being freed from the constraint of the first trigger part 7. The unfolded compressed diaphragm 8 adheres to the inner wall of the silicone drum 5, providing elastic compensation for the silicone drum 5 and allowing the second trigger part 11 to enter the working position. Subsequently, when the keycap 1 is pressed, the silicone drum 5 and the compressed diaphragm 8 deform together, and the first trigger part 7 and the second trigger part 11 work together to complete the triggering; when the keycap 1 is released, the silicone drum 5 and the compressed diaphragm 8 provide a restoring elastic force, thereby restoring the rebound performance and trigger sensitivity of the composite key 101.

[0047] The keyboard body 100 can accommodate multiple composite keys 101 according to the number and layout of keys, and each composite key 101 can be individually adjusted for compensation. When one composite key 101 experiences elastic decay before the others due to higher usage frequency, only the keycap 1 of that composite key 101 needs to be removed and the corresponding drive shaft 2 adjusted. This eliminates the need to disassemble the entire keyboard body 100 or immediately replace the entire silicone drum assembly or conductive film 6. This reduces the difficulty and cost of keyboard repair and extends the overall lifespan of the composite keys 101 and the keyboard body 100.

[0048] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A composite key structure integrating mechanical keycaps and a membrane touch module, characterized in that, Includes a plurality of composite keys (101) mounted on a keyboard frame (102), each of the composite keys (101) comprising: A keycap (1) and a switch (3), wherein the keycap (1) is mounted on the switch (3), and the switch (3) is mounted in the key slot (103) of the keyboard frame (102), and the switch (3) is moved downward by pressing the keycap (1); The pressure equalizing plate (4) is installed at the bottom of the spindle core (3). The outer edge of the pressure equalizing plate (4) is slidably assembled with the keyboard frame (102). The pressure equalizing plate (4) is driven up and down by the spindle core (3). A silicone drum (5) is installed at the bottom of the equalizing plate (4); A conductive film (6) and a PCB circuit board (104) are provided on the conductive film (6) covering the PCB circuit board (104). A trigger point (12) is provided on the conductive film (6) corresponding to the position of each silicone drum (5). The silicone drum (5) is provided with a first trigger part (7) at the position corresponding to the trigger point (12). The interior of the first trigger part (7) is hollow, and the bottom of the first trigger part (7) forms a trigger surface (14). The compression drum assembly (13) is installed at the bottom of the equalizing plate (4) and the compression drum assembly (13) is located in the hollow area inside the first trigger part (7). When the compression drum assembly (13) extends to the outside of the first trigger part (7), it recovers its elastic deformation and unfolds. The unfolded compression drum assembly (13) fits against the inner wall of the silicone drum (5).

2. The composite key structure integrating mechanical keycaps and membrane touch modules according to claim 1, characterized in that: The compression drum assembly (13) includes a compression diaphragm (8) and a connector (9). A protrusion (15) is formed on the top of the compression diaphragm (8). The protrusion (15) is inserted into the connector (9). After the compression diaphragm (8) is unfolded, it can fit against the inner wall of the silicone drum (5). When the compression diaphragm (8) is in a compressed state, the opening direction faces the inside of the silicone drum (5).

3. The composite key structure integrating mechanical keycaps and membrane touch modules according to claim 2, characterized in that: The outer wall of the connector (9) is provided with an external thread (19), and the bottom of the equalizing plate (4) is provided with an internal thread (20) that mates with the external thread (19). The connector (9) is installed on the bottom of the equalizing plate (4) through the mating of the external thread (19) and the internal thread (20). By rotating the connector (9), the connector (9) gradually extends into the first trigger part (7) or extends outward from the first trigger part (7).

4. The composite key structure integrating mechanical keycaps and membrane touch modules according to claim 3, characterized in that: The top of the equalizing plate (4) is provided with a spherical force transmission head (10), the top of the spherical force transmission head (10) is fixedly connected to the bottom of the shaft core (3), and the bottom spherical part of the spherical force transmission head (10) is embedded in the equalizing plate (4).

5. The composite key structure integrating mechanical keycaps and membrane touch modules according to claim 4, characterized in that: A drive shaft (2) is inserted through the middle of the shaft core (3). The bottom of the drive shaft (2) is fixedly connected to the top of the connector (9). The drive shaft (2) passes through the spherical force transmission head (10) and the shaft core (3) and extends to the upper end face of the shaft core (3).

6. The composite key structure integrating mechanical keycaps and membrane touch modules according to claim 5, characterized in that: The top of the drive shaft (2) has a screw end (18) located between the keycap (1) and the shaft core (3). After removing the keycap (1), the drive shaft (2) and the connector (9) are rotated by rotating the screw end (18).

7. The composite key structure integrating mechanical keycaps and membrane touch modules according to claim 2, characterized in that: A second trigger part (11) is provided in the middle of the interior of the compressed diaphragm (8). The second trigger part (11) is retracted into the compressed diaphragm (8). When the compressed diaphragm (8) unfolds and fits against the inner wall of the silicone drum (5), the bottom surface of the second trigger part (11) is flush with the trigger surface (14) of the first trigger part (7).

8. The composite key structure integrating mechanical keycaps and membrane touch modules according to claim 1, characterized in that: The outer wall of the equalizing plate (4) is provided with a guide slider (16), and the inner wall of the keyboard frame (102) is provided with a guide groove (17) corresponding to the guide slider (16). The guide slider (16) is slidably disposed in the guide groove (17).

9. The composite key structure integrating mechanical keycaps and membrane touch modules according to claim 7, characterized in that: The compressed diaphragm (8) is made of elastic silicone material.

10. A mechanical keyboard, characterized in that, It includes a keyboard body (100) and a plurality of composite keys (101) as described in any one of claims 1 to 9, wherein the plurality of composite keys (101) are mounted on the keyboard body (100).

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