WO2023116002A1 - 按键组件及键盘 - Google Patents

按键组件及键盘 Download PDF

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Publication number
WO2023116002A1
WO2023116002A1 PCT/CN2022/113753 CN2022113753W WO2023116002A1 WO 2023116002 A1 WO2023116002 A1 WO 2023116002A1 CN 2022113753 W CN2022113753 W CN 2022113753W WO 2023116002 A1 WO2023116002 A1 WO 2023116002A1
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WO
WIPO (PCT)
Prior art keywords
keycap
cushion block
circuit board
flexible circuit
buffer
Prior art date
Application number
PCT/CN2022/113753
Other languages
English (en)
French (fr)
Inventor
许慧杰
李海涛
雷平平
Original Assignee
荣耀终端有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 荣耀终端有限公司 filed Critical 荣耀终端有限公司
Priority to EP22871095.0A priority Critical patent/EP4224507A4/en
Publication of WO2023116002A1 publication Critical patent/WO2023116002A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/84—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by ergonomic functions, e.g. for miniature keyboards; characterised by operational sensory functions, e.g. sound feedback
    • H01H13/85—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by ergonomic functions, e.g. for miniature keyboards; characterised by operational sensory functions, e.g. sound feedback characterised by tactile feedback features
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/702—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
    • H01H13/705—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by construction, mounting or arrangement of operating parts, e.g. push-buttons or keys
    • H01H13/7065—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by construction, mounting or arrangement of operating parts, e.g. push-buttons or keys characterised by the mechanism between keys and layered keyboards
    • H01H13/7073—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by construction, mounting or arrangement of operating parts, e.g. push-buttons or keys characterised by the mechanism between keys and layered keyboards characterised by springs, e.g. Euler springs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/702—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
    • H01H13/705—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by construction, mounting or arrangement of operating parts, e.g. push-buttons or keys
    • H01H13/7065—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by construction, mounting or arrangement of operating parts, e.g. push-buttons or keys characterised by the mechanism between keys and layered keyboards
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/84—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by ergonomic functions, e.g. for miniature keyboards; characterised by operational sensory functions, e.g. sound feedback
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/83—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by legends, e.g. Braille, liquid crystal displays, light emitting or optical elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2209/00—Layers
    • H01H2209/01—Increasing rigidity; Anti-creep
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2221/00—Actuators
    • H01H2221/036—Return force
    • H01H2221/044—Elastic part on actuator or casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2221/00—Actuators
    • H01H2221/062—Damping vibrations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2227/00—Dimensions; Characteristics
    • H01H2227/036—Minimise height
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H3/12—Push-buttons
    • H01H3/122—Push-buttons with enlarged actuating area, e.g. of the elongated bar-type; Stabilising means therefor
    • H01H3/125—Push-buttons with enlarged actuating area, e.g. of the elongated bar-type; Stabilising means therefor using a scissor mechanism as stabiliser

Definitions

  • the present application relates to the field of key structure, in particular, to a key component and a keyboard.
  • Some keyboards have connecting rods made of metal rods on the inner side of the keycaps, which are used to strengthen the structural rigidity of the keycaps or realize the long-term linkage of longer keycaps.
  • pressing the key cap will drive the connecting rod to hit or rub against the flexible circuit board or the supporting base below the key, which will generate relatively loud noise.
  • the present application provides a key assembly and a keyboard to solve the problem of high key noise in the known technology.
  • the embodiment of the present application provides a button assembly, including a support board, a flexible circuit board, a cushion block, and a pressing assembly.
  • the support plate has opposite first and second surfaces.
  • the support plate has a recessed accommodation portion from the first surface to the second surface, and the accommodation portion defines an accommodation groove.
  • the flexible circuit board is stacked on the first surface, and the flexible circuit board has via holes corresponding to communicate with the accommodating grooves.
  • the buffer block is arranged in the accommodating groove and passes through the hole; the buffer block has a buffer support surface protruding from the surface of the flexible circuit board away from the support plate.
  • the pressing assembly includes a keycap, a support mechanism and a connecting rod; the keycap is movably supported on the support plate through the supporting mechanism, so that the keycap can be pressed or rebounded; the connecting rod is connected to the keycap, and is at least partly connected to the cushion block correspond.
  • the connecting rod descending with the keycap first contacts the cushioning support surface of the cushion block, and is buffered and decelerated by the cushion block, so that the connecting rod will not directly collide with the flexible circuit board And the support plate to reduce noise; after the keycap is released, the cushion block can give the connecting rod an additional resilience, which is conducive to the rapid rebound of the keycap.
  • the accommodating portion formed by the concave support plate can accommodate a thicker cushion block, which has a good cushioning effect and has little influence on the stroke of the keycap.
  • the key assembly further includes a backlight assembly, and the backlight assembly is stacked on the second surface of the support plate.
  • the backlight assembly has a relief hole, the relief hole corresponds to the accommodating portion, and the accommodating portion is at least partially accommodated in the accommodating hole.
  • the recessed accommodating portion is accommodated in the relief hole, thereby avoiding an increase in thickness of the overall structure due to the accommodating portion.
  • the thickness of the cushion block is 0.5-0.8 mm, and the height of the cushion support surface of the cushion block protruding from the surface of the flexible circuit board away from the support plate is 1/ of the thickness of the cushion block 4-1/3.
  • the thickness of the cushion block protruding from the flexible circuit board only accounts for 1/4-1/3 of the overall thickness of the cushion block, which has little influence on the stroke of the key.
  • the cushion block can undergo a certain cushioning deformation. The impact of the cushion block on the stroke of the key is further reduced, and in some cases it can even be achieved without affecting the stroke of the key at all. For example, when using a more flexible cushion block, when the compression amount of the cushion block reaches its protruding thickness during the pressing of the key, the overall stroke of the key will be consistent with that without the cushion block.
  • the keycap is a long keycap, and the length of the keycap is greater than the width.
  • the pressing assembly includes two supporting mechanisms, and the two supporting mechanisms are respectively supported near the two ends of the keycap in the longitudinal direction;
  • the connecting rod includes a reinforcing rod and two linkage rods, and the two linkage rods are mirror-symmetrical along the widthwise mid-plane of the keycap setting;
  • the linkage rod includes a cross bar section and two swing arm sections bent and extended from both ends of the cross bar section respectively, and the cross bar section is rotatably matched with the support plate through the two swing arm sections;
  • the cap extends longitudinally and is fixedly connected to the surface of the key cap facing the flexible circuit board.
  • the cushion block includes four first cushion blocks and two second cushion blocks; the accommodating portion of the support plate includes four first accommodating portions and two second accommodating portions, and the four first accommodating portions
  • the four first buffer blocks are correspondingly accommodated, and the two second accommodation portions are used for correspondingly accommodating the two second accommodation portions.
  • the four first buffer pads are distributed in a rectangular shape near the four corners of the corresponding keycap, and the two second buffer pads are arranged at intervals along the direction parallel to the length of the keycap, and along the length direction of the keycap, two The second buffer pad is located between the first buffer pads; the second buffer pad is a bar-shaped structure extending along the width of the keycap.
  • An installation space is defined between the two second buffer pads and the sides defined by the two first buffer pads adjacent to the keycap in the longitudinal direction, and the two supporting mechanisms are respectively located in the two installation spaces.
  • the four first buffer pads correspond to the four bending parts respectively, and the bending parts refer to the part of the rod segment that is relatively bent at the connection between the cross bar segment and the swing arm segment.
  • the projection of the reinforcement rod on the first surface is located inside the rectangle surrounded by the four first buffer pads; the two second buffer pads respectively correspond to the two ends of the reinforcement rod in the longitudinal direction, and are respectively along the width direction parallel to the keycap. Extend to a position corresponding to the bottom of the rail segment.
  • the rigid linkage of the long keycaps is realized through the linkage rod and the rigidity of the long keycaps with thinner wall thickness is reinforced by the reinforcing rod, and four first The buffer block and the two second buffer blocks realize the buffering when the linkage rod and the reinforcing rod are pressed and the rebound after pressing, which can effectively reduce the button noise and improve the rebound time, and the user experience is good.
  • the height of the second cushion block protruding from the flexible circuit board is equal to the height of the first cushion block protruding from the flexible circuit board, so that when the keycap is pressed, the linkage lever and the first The contact of the cushion block and the second cushion block is synchronized with the contact of the reinforcing bar and the second cushion block.
  • the protruding height of the first cushion block is equal to that of the second cushion block, so that when the key is pressed, the four bending parts of the linkage rod contact the corresponding four first cushion blocks, and the long rod of the linkage lever
  • the contact between the segment and the second buffer block and the contact between the reinforcing rod and the second buffer block are all carried out simultaneously, so that all places can be reliably cushioned, and the noise generated by collision or friction at various places can be reduced to the greatest extent.
  • the long keycap can be pressed down and rebounded in a balanced way, and the use feeling is good.
  • the height of the second cushion block protruding from the flexible circuit board is smaller than the height of the first cushion block protruding from the flexible circuit board, so that when the keycap is pressed, the linkage lever and the first Contact of the bumper precedes contact of the reinforcing bar and the second bumper.
  • the keycap will receive two levels of cushioning when the key is pressed.
  • the first level of cushioning is the cushioning of the first cushion block on the linkage rod
  • the second level of cushioning is the first level of cushioning plus the second cushion block on the linkage rod.
  • the buffer of the reinforcing rod so as to form a buffer with increasing strength step by step, and the use feel is better; in addition, the first contact between the linkage rod and the first buffer pad can ensure that the keys of the long key cap are stable, and there will be no phenomenon that the key is located on the long key cap. The phenomenon that one side of the long keycap is more likely to be lifted when the second buffer pad in the middle position and the reinforcing rod are in contact first.
  • the recessed depth of the first accommodating portion is smaller than the recessed depth of the second accommodating portion, and/or: the thickness of the first cushion block is greater than the thickness of the second cushion block.
  • the protruding height of the second cushion block can be made smaller than that of the first cushion block by arranging a deeper recessed second accommodation part or a second cushion block with a smaller thickness. Choose according to the actual situation.
  • the connecting rod includes two linkage rods, and the two linkage rods are mirror-symmetrically arranged along the widthwise middle plane of the keycap.
  • the linkage rod includes a cross bar section and two swing arm sections respectively bent and extended from two ends of the cross bar section, and the cross bar section is rotatably matched with the support plate through the two swing arm sections.
  • the buffer pad includes four first buffer pads, the four first buffer pads are distributed in a rectangular shape, and the four first buffer pads correspond to the four bending parts respectively, and the bending parts refer to the cross bar section and the swing arm A part of the rod segment that is relatively bent at the junction of the two segments.
  • the linkage lever can make the keyboard be pressed smoothly or the keycap is rigidly linked in the long direction, so as to ensure the feel of the key.
  • the set of four first buffer pads can make the four bending parts of the linkage rod first contact with the buffer, reducing the noise generated by the linkage rod directly impacting or rubbing the flexible circuit board or the support plate.
  • the four bending parts are respectively supported on the four first buffer pads at the four corners, which can also keep the support stable, so that when the keycap is pressed in place, the press fit is smooth without one side being tilted.
  • the connecting rod further includes a reinforcing rod, which extends along the length of the keycap as a whole and is fixedly connected to the surface of the keycap facing the flexible circuit board; the reinforcing rod is on the first The projection of the surface is located inside the rectangle enclosed by the four first cushion blocks.
  • the buffer pad also includes two second buffer pads, the two second buffer pads are arranged at intervals along the length of the keycap, and respectively correspond to the two ends of the reinforcing bar in the longitudinal direction; the second buffer pad is parallel to the keycap The width of the cap extends to a position corresponding to the lower part of the cross bar section.
  • the reinforcing rod is used to increase the rigidity of the keycap and is suitable for a keycap with a small wall thickness.
  • the reinforcing rod can be buffered to reduce the noise generated by the direct collision between the reinforcing rod and the flexible circuit board or the support plate, and at the same time, it can also assist in supporting and buffering the cross bar section of the aforementioned linkage rod.
  • the cushion block is made of silica gel or rubber material.
  • the cushion block can be made of silica gel, rubber or other elastic materials.
  • the support mechanism is a scissor foot mechanism; a third cushion block is provided between the support mechanism and the flexible circuit board; and a fourth cushion block is provided at the place where the keycap corresponds to the support mechanism.
  • the noise between the keycap and the support mechanism, and the support mechanism and the flexible circuit board can be reduced when a key is pressed.
  • the embodiment of the present application provides a keyboard, including a housing and the aforementioned key assembly.
  • the housing surrounds an inner space, and the housing is provided with a key hole.
  • the key assembly is installed in the inner space, and the key cap protrudes out of the inner space through the key hole.
  • the keyboard in the embodiment of the present application adopts the aforementioned pressing assembly, and the key noise is relatively small during use.
  • Fig. 1 is the structural representation of the keyboard of an embodiment of the present application
  • Fig. 2 is a partial structural view of the keyboard of Fig. 1;
  • Fig. 3 is the expanded schematic diagram in Fig. 2;
  • Fig. 4 is the sectional view along I-I line of Fig. 2;
  • Figure 5 is an enlarged view of A in Figure 4.
  • Fig. 6 is a schematic diagram of the mating relationship between the keycap and the connecting rod.
  • Fig. 7 is the schematic diagram of Fig. 2 after hiding the space bar and a common keycap
  • Fig. 8 is an enlarged view at B of Fig. 7;
  • FIG. 9 is a side view of the button assembly corresponding to the space bar with the keycap hidden.
  • the first storage unit 36a The first storage unit 36a
  • the second storage part 36b is the second storage part 36b
  • This embodiment provides a keyboard, which can be a membrane keyboard or other keyboards; it can be an independent keyboard or a keyboard attached to a complete machine such as a notebook computer.
  • the keyboard 10 in this embodiment includes a casing 11 and several key assemblies 20 mounted on the casing 11 .
  • the user can input information by pressing the button assembly 20 .
  • the quantity and layout of the key assembly 20 can be arranged according to the 79 keys, 83 keys, 87 keys, 93 keys, 96 keys, 101 keys, 102 keys, 104 keys, 107 keys and other forms of common keyboards.
  • the keys of the keyboard 10 in this embodiment include several common keycaps 27c whose length and width are substantially equal and several long keycaps 27b whose length is longer than the width.
  • a typical long keycap 27b mainly has a space bar 27a. The ratio of the length and width of the space bar 27a can reach about 6 times sometimes.
  • the keyboard 10 further includes a touchpad 12 for replacing a common mouse.
  • the touch panel 12 is an existing structure, which will not be repeated here.
  • the housing 11 encloses an inner space Q1 , and the housing 11 defines keyholes K1 corresponding to the number of keys. Each keyhole K1 communicates with the inner space Q1 of the housing 11 for exposing the key assembly 20 .
  • the button assembly 20 provided by the embodiment of the present application includes a support board 21 , a flexible circuit board 22 , a cushion block 23 and a pressing assembly 24 .
  • the key assembly 20 is also provided with a backlight assembly 25 .
  • the support plate 21 has a first surface P1 and a second surface P2 opposite to each other, the flexible circuit board 22 is stacked on the first surface P1, and the backlight assembly 25 (if any) is stacked on the second surface P2 of the support plate 21 .
  • the backlight assembly 25 , the supporting board 21 and the flexible circuit board 22 can be arranged in the inner space Q1 of the casing 11 in a manner of being sequentially stacked.
  • the support plate 21 can be made of metal plates such as aluminum plates, which can provide a certain bearing capacity and have high structural rigidity.
  • the flexible circuit board 22 has a plurality of key contacts (not shown) and triggers 26 corresponding to each pressing assembly 24, so that the action of pressing the pressing assembly 24 can make the trigger 26 contact the key contacts, Therefore, the flexible circuit board 22 receives and converts the input electrical signal.
  • the flexible circuit board 22 can be electrically connected to a processor of a host computer such as a notebook computer through an FPC (Flexible Printed Circuit, flexible circuit board).
  • the backlight assembly 25 is disposed on the other side of the support plate 21 for providing backlight when needed. In some embodiments, the backlight assembly is composed of a backlight plate and a protective film.
  • the pressing assembly 24 includes a keycap 27 , a supporting mechanism 28 and a connecting rod 29 .
  • the keycap 27 is movably supported on the supporting plate 21 through the supporting mechanism 28, so that the keycap 27 can be pressed or rebounded.
  • the keycap 27 can be a long keycap 27b such as a space bar 27a, or an ordinary keycap 27c with similar length and width.
  • the long keycaps 27b such as the space bar 27a have a longer length and a smaller wall thickness.
  • the structural rigidity or strength of the keycap 27 can be enhanced by arranging a reinforcing rod 30 on the inner side of the keycap 27 (towards the support mechanism 28 side).
  • the reinforcing rod 30 extends along the length Y1 of the keycap 27 as a whole and is fixedly connected to the surface of the keycap 27 facing the flexible circuit board 22 by bonding or clamping.
  • the strong rod 30 is arranged as two U-shaped rods facing each other, and a blank area S1 is formed between the two, which is used to correspond to the trigger 26, so that the trigger 26 directly corresponds to the keycap 27 without being reinforced by the reinforcing rod. 30 blocks to ensure the stroke of the trigger 26.
  • some long keycaps 27b are also supported and connected to the support plate 21 through the linkage rod 31, which is used to realize the long-term linkage of the long keycaps 27b, so as to prevent the pressing position from being located at one end of the long keycap 27b.
  • the long keycap 27b is pressed down asynchronously, which causes the long keycap 27b to be pressed down obliquely and affects the key feel.
  • the two swing arm segments 33 formed by folding and extending, the cross bar segment 32 is rotatably matched with the support plate 21 through the two swing arm segments 33, the cross bar segment 32 is matched with the side of the long keycap 27b close to the support mechanism 28, and can be The form of rotation is connected to the long key cap 27b.
  • a locking part (not shown in the figure) may be provided on the long keycap 27b, and the cross bar section 32 is rotatably locked in the locking part.
  • the rotatable matching structure of the arm section 33 on the support plate 21 can be set as required, for example, referring to Fig. 7 and Fig.
  • a mounting block 34 protruding from the plate surface is provided on the support plate 21, and a matching groove C1 is provided on the mounting block 34
  • the end of the swivel arm section 33 is bent so that the swivel arm 35 is rotatably fitted in the fitting groove C1. In this way, when the keycap 27 is pressed down, the linkage lever 31 can rotate relative to the keycap 27 and the support plate 21 while supporting the keycap 27 in the longitudinal direction.
  • the connecting rod 29 in this embodiment may include the linkage rod 31 and the reinforcing rod 30 mentioned above, or one of them.
  • the support mechanism 28 adopts a scissors foot structure, and its key stroke is relatively short, such as up to 1.8-2.0 mm, which is especially suitable for notebook computer keyboards or some membrane keyboards.
  • the flexible circuit board 22 is provided with a slot C2 for allowing the connection part of the support mechanism 28 to pass through to support and connect to the support plate 21 .
  • the strength of a part of the surface of the flexible circuit board 22 can also be set higher for supporting and connecting the supporting mechanism 28 .
  • the support plate 21 has a receiving portion 36 that is recessed from the first surface P1 to the second surface P2, and the receiving portion 36 defines a receiving groove C3.
  • the accommodating portion 36 in this embodiment may be a concave structure stamped on the support plate 21 .
  • the flexible circuit board 22 has a via hole K2 corresponding to the accommodating groove C3.
  • the backlight assembly 25 has a relief hole K3 corresponding to the accommodating portion 36, and the accommodating portion 36 is at least partially accommodated in the relief hole K3, so that the accommodating portion recessed toward the backlight assembly 25 side
  • the placement portion 36 does not increase the thickness of the overall structure.
  • the buffer block 23 is disposed in the receiving cavity C3 and passes through the hole K2 of the flexible circuit board 22 .
  • the buffer block 23 has a buffer support surface P3 protruding from the surface of the flexible circuit board 22 away from the support plate 21 .
  • the connecting rod 29 descending with the key cap 27 first contacts the buffer support surface P3 of the buffer block 23, and is buffered and decelerated by the buffer block 23, so that the connecting rod 29 does not It will directly collide with the flexible circuit board 22 and the support plate 21 to reduce the generation of noise; after the keycap 27 is released, the cushion block 23 can give the connecting rod 29 an additional resilience, which is conducive to the rapid rebound of the keycap 27.
  • the recessed receiving portion 36 of the support plate 21 can accommodate the thicker cushion block 23 , which has a good cushioning effect and less influence on the stroke of the keycap 27 .
  • the cushion block 23 in this embodiment includes four first cushion blocks 23a and two second cushion blocks 23b.
  • the accommodating portion 36 of the support plate 21 includes four first accommodating portions 36a and two second accommodating portions 36b, and the four first accommodating portions 36a are used for correspondingly accommodating four first cushion blocks 23a, the two second accommodating portions 36b are used to accommodate the two second accommodating portions 36b correspondingly.
  • the four first cushion blocks 23a are distributed in a rectangular shape near the four corners of the corresponding keycap 27, and the two second cushion blocks 23b are arranged at intervals along the long direction Y1 parallel to the keycap 27, and along the long direction of the keycap 27
  • two second buffer pads 23b are located between the first buffer pads 23a; the second buffer pads 23b are bar-shaped structures extending along the width direction Y2 of the keycap 27 .
  • An installation space Q2 is defined between the two second buffer pads 23b and the sides defined by the two first buffer pads 23a adjacent to the keycap 27 along the Y1 direction, and the two support mechanisms 28 are respectively located in the two installation spaces Q2 place.
  • the four first cushion blocks 23 a respectively correspond to the four bending parts 37 , and the bending parts 37 refer to the part of the rod segment that is relatively bent at the connection between the cross bar segment 32 and the swing arm segment 33 .
  • the projection of the reinforcing rod 30 on the first surface P1 is located inside the rectangle surrounded by the four first buffer pads 23a;
  • the width direction Y2 of the cap 27 extends to a position corresponding to the lower part of the cross bar section 32 .
  • the rigid linkage of the long keycaps 27b is realized by the linkage rod 31 and the rigidity of the long keycaps 27b with a thinner wall thickness is reinforced by the reinforcing rod 30.
  • the buffering of the linkage rod 31 and the reinforcing rod 30 when pressed and the rebound after pressing can be effectively reduced.
  • the reinforcing rod 30 directly hits or rubs against the noise generated by the flexible circuit board 22 or the supporting board 21, and reduces the rebound time, so that the user experience is good.
  • the buffer pads 23 (the first buffer pads 23 a and/or the second buffer pads 23 b ) in this embodiment are made of silica gel, rubber or other elastic materials.
  • the stroke of the keys is about 1.8-2.0mm
  • the thickness of the cushion block 23 (the first cushion block 23a and/or the second cushion block 23b) can be set at this time to be 0.5-0.8mm
  • the height of the buffer pad 23 protruding from the buffer support surface P3 of the side surface of the flexible circuit board 22 away from the support plate 21 is 1/4-1/3 of the thickness of the buffer pad 23 .
  • the buffer block 23 of this thickness can provide suitable buffer space and resilience, and the protrusion of the thickness 1/4-1/3 of the buffer block 23 can also be connected to the connecting rod 29 ( The linkage rod 31 and/or the reinforcing rod 30) are pressed down and deformed, further reducing or even completely eliminating the influence of the protruding part on the overall stroke of the key.
  • the linkage rod 31 and/or the reinforcing rod 30 are pressed down and deformed, further reducing or even completely eliminating the influence of the protruding part on the overall stroke of the key.
  • the cushion block 23 with greater flexibility when the compression of the cushion block 23 reaches its protruding thickness during the pressing of the key, the overall stroke of the key will be consistent with that when the cushion block 23 is not provided.
  • the height of the second cushion block 23b protruding from the flexible circuit board 22 is equal to the height of the first cushion block 23a protruding from the flexible circuit board 22, so that when the keycap 27 is pressed The contact between the linkage rod 31 and the first cushion block 23a and the second cushion block 23b is synchronized with the contact between the reinforcing rod 30 and the second cushion block 23b.
  • the protruding height of the first cushion block 23a is equal to that of the second cushion block 23b, so that when the button is pressed, the four bending parts 37 of the linkage lever 31 are in contact with the corresponding four first cushion blocks 23a, The contact between the long rod section of the linkage rod 31 and the second cushion block 23b, and the contact between the reinforcing rod 30 and the second cushion block 23b are all carried out simultaneously, so that reliable cushioning can be obtained everywhere, and the collision or friction generation can be reduced to the greatest extent. noise. And based on this structure, no matter where the pressing position is on the long keycap 27b, the long keycap 27b can be pressed down and rebounded in a balanced manner, and the use feeling is good.
  • the height of the second cushion block 23b protruding from the flexible circuit board 22 is smaller than the height of the first cushion block 23a protruding from the flexible circuit board 22, so that when the keycap 27 is pressed, the linkage lever 31 The contact with the first bumper block 23a is prior to the contact of the reinforcing bar 30 with the second bumper block 23b.
  • the keycap 27 when the key is pressed, the keycap 27 will be subjected to two-stage buffering, the first-stage buffering is the buffering of the first buffer pad 23a to the linkage rod 31, and the second-stage buffering is the first-stage buffer plus the second buffer pad 23b buffers the linkage rod 31 and the reinforcing rod 30, thereby forming a buffer with increasing strength step by step, and the use feeling is better; in addition, the first contact between the linkage rod 31 and the first cushion block 23a can ensure that the long keycap 27b is pressed smoothly , and the phenomenon that one side of the long keycap 27b is more likely to be lifted when the second cushion block 23b located in the middle position of the long keycap 27b in the long direction and the reinforcing rod 30 contacts first will not occur.
  • the recessed depth of the first accommodating portion 36a is smaller than the recessed depth of the second accommodating portion 36b, and/or: the thickness of the first cushion block 23a is greater than that of the second cushion block 23b, so as to realize that the protrusion height of the second cushion block 23b is smaller than that of the first cushion block 23a.
  • a third cushion block 38 is provided between the support mechanism 28 and the flexible circuit board 22, and a fourth cushion block 39 is provided between the keycap 27 and the support mechanism 28, for When the key is lowered, there is noise between the keycap 27 and the support mechanism 28 , and between the support mechanism 28 and the flexible circuit board 22 .
  • the fourth cushion block 39 can be fixed on the side of the keycap 27 corresponding to the support mechanism 28 by bonding or other means, or can be fixed on the surface of the support mechanism 28 corresponding to the side of the keycap 27 .
  • the third cushion block 38 can be adhered to the surface of the flexible circuit board 22 and corresponds to the supporting mechanism 28 .
  • the third cushion block 38 and the fourth cushion block 39 can be made of silica gel, rubber or other elastic materials.
  • the keyboard 10 includes a plurality of long keycaps 27b with a large aspect ratio (for example, the aspect ratio is above 1.5) and a plurality of ordinary keycaps 27c.
  • the long keycap 27b includes, for example, a space bar 27a, a backspace key, a CTRL key, etc.
  • the common keycap 27c includes letter keys, number keys, and the like.
  • the long keycap 27b adopts the setting method of the aforementioned key assembly 20, while the ordinary keycap 27c only sets the aforementioned third cushion block 38 between the keycap 27, the supporting mechanism 28 and the flexible circuit board 22 with reference to And the fourth cushion block 39. In this way, a keyboard in which the key noise of each key can be effectively controlled is obtained, which is beneficial to the environment where the keyboard needs to be used quietly.

Landscapes

  • Push-Button Switches (AREA)
  • Input From Keyboards Or The Like (AREA)

Abstract

本申请涉及按键结构领域，旨在解决已知技术按键噪声较大的问题，提供按键组件及键盘。按键组件包括支撑板、软性电路板、缓冲垫块和按压组件。支撑板具有相背的第一表面和第二表面。支撑板具有从第一表面向第二表面一侧下凹的容置部，容置部限定容置槽。软性电路板叠设于第一表面，软性电路板具有对应连通容置槽的过孔。缓冲垫块设置于容置槽，并穿出过孔；缓冲垫块具有凸出软性电路板远离支撑板一侧表面的缓冲支撑面。按压组件包括键帽、支撑机构和连接杆；键帽通过支撑机构可活动地支撑于支撑板，以使键帽能够被按压或回弹；连接杆连接于键帽，且至少部分和缓冲垫块对应。本申请的有益效果是减少噪声的产生、缓冲效果好且对键帽的行程影响小。

Description

按键组件及键盘
本申请要求于2021年12月24日提交中国专利局的申请号为202111599799.7、申请名称为“按键组件及键盘”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及按键结构领域，具体而言，涉及按键组件及键盘。
背景技术
一些键盘的键帽内侧设置有由金属杆等制成的连接杆，用于加强键帽的结构刚度或实现较长键帽的长向联动等。
然而，已知技术中，按压键帽会带动连接杆撞击或摩擦按键下方的软性电路板或支撑底板，产生较大噪声。
发明内容
本申请提供按键组件及键盘，以解决已知技术按键噪声较大的问题。
第一方面，本申请实施例提供一种按键组件，包括支撑板、软性电路板、缓冲垫块和按压组件。支撑板具有相背的第一表面和第二表面。支撑板具有从第一表面向第二表面一侧下凹的容置部，容置部限定容置槽。软性电路板叠设于第一表面，软性电路板具有对应连通容置槽的过孔。缓冲垫块设置于容置槽，并穿出过孔；缓冲垫块具有凸出软性电路板远离支撑板一侧表面的缓冲支撑面。按压组件包括键帽、支撑机构和连接杆；键帽通过支撑机构可活动地支撑于支撑板，以使键帽能够被按压或回弹；连接杆连接于键帽，且至少部分和缓冲垫块对应。
本申请实施例的按键组件中，按压键帽后，随键帽下行的连接杆先接触缓冲垫块的缓冲支撑面，并被缓冲垫块缓冲减速，使连接杆不会直接碰撞软性电路板及支撑板，减少噪声的产生；在松开键帽后，缓冲垫块能够给连接杆一个附加的回弹力，有利于键帽快速回弹。同时，支撑板下凹形成的容置部可以容置厚度较大的缓冲垫块，缓冲效果好且对键帽的行程影响较小。
在一种可能的实现方式中，按键组件还包括背光组件，背光组件叠设于支撑板的第二表面。背光组件具有让位孔，让位孔对应于容置部，容置部至少部分容置于让位孔。
该实现方式中，凹出的容置部通过容置于让位孔，而避免整体结构因容置部而增加厚度。
在一种可能的实现方式中，缓冲垫块的厚度为0.5-0.8mm，且缓冲垫块凸出软性电路板远离支撑板一侧表面的缓冲支撑面的高度为缓冲垫块厚度的1/4-1/3。
该实现方式中，缓冲垫块凸出软性电路板的厚度仅占缓冲垫块总体厚度的1/4-1/3，对按键行程影响较小，加之缓冲垫块可发生一定的缓冲变形，更进一步地减小了缓冲垫块对按键行程的影响，一些情形中甚至可以做到完全不影响按键行程。如，采用柔性较大的缓冲垫块时，下压按键的过程中对缓冲垫块的压缩量达到其凸出厚度时，按键的整体行程将和未设置缓冲垫块时一致。
在一种可能的实现方式中，键帽为长键帽，键帽的长度大于宽度。按压组件包括两个支撑机构，两个支撑机构分别支撑于键帽的长向两端附近；连接杆包括补强杆和两个联动杆，两个联动杆沿键帽的宽向中面镜像对称设置；联动杆包括横杆段和分别从横杆段的两端弯折 延伸形成的两个旋臂段，横杆段通过两旋臂段可转动地配合于支撑板；补强杆整体沿键帽的长向延伸并固定连接于键帽朝向软性电路板的一侧表面。缓冲垫块包括四个第一缓冲垫块和两个第二缓冲垫块；支撑板的容置部包括四个第一容置部和两个第二容置部，四个第一容置部用于对应容置四个第一缓冲垫块，两个第二容置部用于对应容置两个第二容置部。四个第一缓冲垫块呈矩形分布于对应键帽四角附近的位置，两个第二缓冲垫块沿平行于键帽的长度的方向间隔设置，且在沿键帽的长度方向上，两个第二缓冲垫块位于第一缓冲垫块之间；第二缓冲垫块为沿键帽的宽向延伸的条形结构。两个第二缓冲垫块分别和其在键帽长向临近的两第一缓冲垫块所限定的边之间限定安装空间，两个支撑机构分别位于两个安装空间处。四个第一缓冲垫块分别对应于四个弯折部，弯折部指横杆段和旋臂段两者连接处相对弯折的部分杆段。补强杆在第一表面的投影位于四个第一缓冲垫块围成的矩形内侧；两个第二缓冲垫分别对应补强杆的长向两端，并分别沿平行于键帽的宽向延伸至对应于横杆段下方的位置。
该实现方式中，对于如键盘的空格键等长键帽，通过联动杆实现长键帽的刚性联动及通过补强杆补强壁厚较薄的长键帽的刚度，并通过四个第一缓冲垫块和两个第二缓冲垫块实现联动杆和补强杆按压时的缓冲和按压结束后的回弹，能够有效降低按键噪声和提高回弹时间，使用体验好。
在一种可能的实现方式中，第二缓冲垫块凸出软性电路板的高度与第一缓冲垫块凸出软性电路板的高度相等，以使按压键帽时，联动杆和第一缓冲垫块及第二缓冲垫块的接触同步于补强杆和第二缓冲垫块的接触。
该实现方式中，第一缓冲垫块的凸出高度等于第二缓冲垫块，使得按键时，联动杆的四个弯折部与对应的四个第一缓冲垫块接触、联动杆的长杆段与第二缓冲垫块接触、补强杆与第二缓冲垫块接触均同时进行，使得各处均能够得到可靠缓冲，最大可能降低各处碰撞或摩擦产生的噪声。且基于该结构，无论按压位置在长键盘的何处，长键帽都能平衡地下压和回弹，使用手感佳。
在另一种可能的实现方式中，第二缓冲垫块凸出软性电路板的高度小于第一缓冲垫块凸出软性电路板的高度，以使按压键帽时，联动杆和第一缓冲垫块的接触先于补强杆和第二缓冲垫块的接触。
该实现方式中，按键时键帽将受到两级缓冲，第一级缓冲为第一缓冲垫块对联动杆的缓冲，第二级缓冲为第一级缓冲加上第二缓冲垫块对联动杆和补强杆的缓冲，从而形成力度逐级增大的缓冲，使用手感更佳；此外，联动杆和第一缓冲垫块先接触能够保证长键帽按键平稳，而不会出现位于长键帽长向中间位置的第二缓冲垫块和补强杆先接触时更可能出现的长键帽一侧翘起的现象。
可选地，第一容置部的凹入深度小于第二容置部的凹入深度，和/或：第一缓冲垫块的厚度大于第二缓冲垫块的厚度。
该实现方式中，通过设置更深凹入的第二容置部或更小厚度的第二缓冲垫块两种方式均可使第二缓冲垫块的凸出高度小于第一缓冲垫块，具体可根据实际情况选用。
在一种可能的实现方式中，连接杆包括两个联动杆，两个联动杆沿键帽的宽向中面镜像对称设置。联动杆包括横杆段和分别从横杆段的两端弯折延伸形成的两个旋臂段，横杆段通过两旋臂段可转动地配合于支撑板。缓冲垫块包括四个第一缓冲垫块，四个第一缓冲垫块呈矩形分布，且四个第一缓冲垫块分别对应于四个弯折部，弯折部指横杆段和旋臂段两者连接 处相对弯折的部分杆段。
该实现方式中，联动杆能够使键盘平稳按压或键帽长向刚性联动，确保按键手感。设置的四个第一缓冲垫块能够使联动杆以其四个弯折部先接触缓冲，减少了联动杆直接撞击或摩擦软性电路板或支撑板产生的噪声。同时，四个弯折部分别支撑于四角的四个第一缓冲垫块，也能保持支撑的平稳，进而使键帽按压到位时，压合平整而不会出现一侧翘起的状态。
在一种可能的实现方式中，连接杆还包括补强杆，补强杆整体沿键帽的长向延伸并固定连接于键帽朝向软性电路板的一侧表面；补强杆在第一表面的投影位于四个第一缓冲垫块围成的矩形内侧。缓冲垫块还包括两个第二缓冲垫块，两个第二缓冲垫沿键帽的长向彼此间隔地设置，并分别对应补强杆的长向两端；第二缓冲垫沿平行于键帽的宽向延伸至对应于横杆段的下方的位置。
该实现方式中，补强杆用于能够键帽刚度，适于壁厚较小的键帽。通过设置第二缓冲垫，一方面可以缓冲补强杆，降低补强杆直接与软性电路板或支撑板碰撞产生的噪声，同时也能辅助支撑和缓冲前述联动杆的横杆段。在按键结束松开键帽后，四个第一缓冲垫块和两个第二缓冲垫块通过在各位置对联动杆和补强杆施加附加的回弹力，有利于键帽快速平稳地回弹。
在一种可能的实现方式中，缓冲垫块采用硅胶或橡胶材料制成。
该实现方式中，缓冲垫块可采用硅胶、橡胶或其他弹性材料制成。
在一种可能的实现方式中，支撑机构为剪刀脚机构；支撑机构和软性电路板之间设有第三缓冲垫块；键帽对应支撑机构处设有第四缓冲垫块。
该实现方式中，通过设置第三缓冲垫块和第四缓冲垫块，能够降低按键时，键帽和支撑机构、支撑机构和软性电路板之间的噪声。
第二方面，本申请实施例提供一种键盘，包括壳体和前述的按键组件。壳体围成内部空间，且壳体开设有键孔。按键组件安装于内部空间，且键帽通过键孔凸出内部空间之外。
本申请实施例中的键盘采用前述的按压组件，使用时按键噪声较小。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对实施例中的附图作简单地介绍，应当理解，以下附图仅示出了本申请的某些实施例，因此不应被看作是对范围的限定，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他相关的附图。
图1为本申请一实施例的键盘的结构示意图；
图2为图1的键盘的部分结构视图；
图3为图2中的展开示意图；
图4为图2的沿I-I线的剖视图；
图5为图4的A处放大图；
图6为键帽和连接杆的配合关系示意图。
图7为图2隐藏空格键和一普通键帽后的示意图；
图8为图7的B处放大图；
图9为空格键对应的按键组件隐藏键帽后的侧向视图。
主要元件符号说明：
键盘              10
壳体                             11
触控板                           12
按键组件                         20
支撑板                           21
软性电路板                       22
缓冲垫块                         23
第一缓冲垫块                     23a
第二缓冲垫块                     23b
按压组件                         24
背光组件                         25
触发件                           26
键帽                             27
空格键                           27a
长键帽                           27b
普通键帽                         27c
支撑机构                         28
连接杆                           29
补强杆                           30
联动杆                           31
横杆段                           32
旋臂段                           33
安装块                           34
旋转臂                           35
容置部                           36
第一容置部                       36a
第二容置部                       36b
弯折部                           37
第三缓冲垫块                     38
第四缓冲垫块                     39
配合槽                           C1
开槽                             C2
容置槽                           C3
键孔                             K1
过孔                             K2
让位孔                           K3
第一表面                         P1
第二表面                         P2
缓冲支撑面                       P3
内部空间                         Q1
安装空间                         Q2
空白区域                         S1
长向                             Y1
宽向                             Y2
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描 述，显然，所描述的实施例仅是本申请一部分实施例，而不是全部的实施例。
需要说明的是，当元件被称为“固定于”另一个元件，它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件，它可以是直接连接到另一个元件或者可能同时存在居中元件。当一个元件被认为是“设置于”另一个元件，它可以是直接设置在另一个元件上或者可能同时存在居中元件。本文所使用的术语“垂直的”、“水平的”、“左”、“右”以及类似的表述只是为了说明的目的。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请领域的技术人员通常理解的含义相同。本文中在本申请的说明书中所使用的术语只是为了描述具体的实施方式的目的，不是旨在于限制本申请。本文所使用的术语“或/及”包括一个或多个相关的所列项目的任意的和所有的组合。
本申请的一些实施方式作详细说明。在不冲突的情况下，下述的实施方式及实施方式中的特征可以相互组合。
本实施例提供了一种键盘，可以是薄膜键盘或其他键盘；可以是独立使用的键盘或附设在笔记本电脑等整机上的键盘。
参见图1，本实施例中的键盘10包括壳体11和若干安装于壳体11的按键组件20。使用者能够通过按压按键组件20进行信息输入。按键组件20的数量和布设方式可以根据常用键盘的79键、83键、87键、93键、96键、101键、102键、104键、107键等形式布设。本实施例中键盘10的按键包括若干长宽基本相等的普通键帽27c和若干长度长于宽度的长键帽27b。典型的长键帽27b主要有空格键27a。空格键27a长度和宽度之比有时可达到6倍左右。
在一些实施方式中，键盘10还包括触控板12，用于替代普通鼠标。触控板12为现有结构，在此不赘述。
本实施例中，壳体11围成内部空间Q1，且壳体11开设有对应按键数量的键孔K1，各键孔K1分别连通壳体11的内部空间Q1，用于露出按键组件20。
参见图2-图5，本申请实施例提供的按键组件20包括支撑板21、软性电路板22、缓冲垫块23和按压组件24。一些实施方式中，按键组件20还设置有背光组件25。
其中，支撑板21具有相背的第一表面P1和第二表面P2，软性电路板22叠设于第一表面P1，背光组件25(如有)叠设于支撑板21的第二表面P2。背光组件25、支撑板21和软性电路板22可以依次叠合的方式设置在壳体11的内部空间Q1中。支撑板21可采用铝板等金属板制成，能够提供一定的承载力并具有较高的结构刚度。软性电路板22上具有多个和各按压组件24对应的键位触点(图中未示出)和触发件26，使得按压按压组件24的动作能使触发件26接触键位触点，从而软性电路板22接收并转化为输入电信号。软性电路板22可以通过FPC(Flexible Printed Circuit，柔性电路板)电连接至笔记本电脑等主机的处理器。背光组件25设置在支撑板21的另一侧，用于在需要时提供背光。一些实施方式中，背光组件由背光板、保护贴膜构成。
按压组件24包括键帽27、支撑机构28和连接杆29。键帽27通过支撑机构28可活动地支撑于支撑板21，以使键帽27能够被按压或回弹。
其中，键帽27可以是空格键27a等长键帽27b，也可以是长宽接近的普通键帽27c。对于一些整体厚度较小的键盘，如笔记本电脑附带键盘，其空格键27a等长键帽27b存在长度较长且壁厚较小的情形。此时，如图6中所示，可采用在键帽27的内侧(朝向支撑机构28一 侧)设置补强杆30的形式来加强键帽27的结构刚度或强度。本实施例中，补强杆30整体沿键帽27的长向Y1延伸并通过粘接或卡接的方式固定连接于键帽27朝向软性电路板22的一侧表面，可选地，补强杆30设置为由两个弯成U形的杆件相向拼合，两者中间围成一个空白区域S1，用于对应触发件26，使触发件26直接对应键帽27而不被补强杆30阻挡，确保触发件26的行程。
除前述补强杆30外，一些长键帽27b还通过联动杆31支撑连接至支撑板21，用于实现长键帽27b的长向联动，避免按压位置位于长键帽27b长向一端时，长键帽27b长向下压不同步而导致长键帽27b倾斜下压影响按键手感。本实施例中，联动杆31有两个，两个联动杆31沿键帽27的宽向Y2中面镜像对称设置，联动杆31包括横杆段32和分别从横杆段32的两端弯折延伸形成的两个旋臂段33，横杆段32通过两旋臂段33可转动地配合于支撑板21，横杆段32配合于长键帽27b靠近支撑机构28一侧，并以可自转的形式连接于长键帽27b。例如，可在长键帽27b上设置卡扣部(图中未示出)，横杆段32可转动地卡接在卡扣部内。旋臂段33在支撑板21上的可转动配合结构可根据需要设置，例如参见图7和图8，在支撑板21上设置凸出板面的安装块34，安装块34上设置配合槽C1，旋臂段33末端折弯形成旋转臂35转动配合于该配合槽C1中。如此，在按下键帽27时，联动杆31沿长向支撑键帽27的同时，能够相对键帽27和支撑板21旋转。
本实施例中的连接杆29可以包括前述联动杆31和补强杆30，也可以是两者之一。
对于空格键27a等长键帽27b，其按压组件24的支撑机构28可设置为两个，两个支撑机构28分别支撑于键帽27的长向Y1两端附近。本实施例中，支撑机构28采用剪刀脚结构，其按键行程较短，如可达1.8-2.0mm，尤其适用于笔记本电脑键盘或一些薄膜键盘。
本实施例中，配合参见图9，软性电路板22上设有开槽C2，用于容许支撑机构28的连接部位穿过以支撑连接于支撑板21。当然，在另一些实施例中，也可将软性电路板22的部分板面的强度设置得较高，用于支撑和连接支撑机构28。
主要参见图5，本实施例中，支撑板21具有从第一表面P1向第二表面P2一侧下凹的容置部36，容置部36限定容置槽C3。本实施例中的容置部36可以为在支撑板21上冲压形成的下凹结构。软性电路板22具有对应连通容置槽C3的过孔K2。对于设置背光组件25的情形，背光组件25具有对应于容置部36的让位孔K3，容置部36至少部分容置于让位孔K3，以使向背光组件25一侧凹入的容置部36不额外增加整体结构的厚度。
缓冲垫块23设置于容置槽C3，并穿软性电路板22的出过孔K2，缓冲垫块23具有凸出软性电路板22远离支撑板21一侧表面的缓冲支撑面P3。本实施例的按键组件20中，按压键帽27后，随键帽27下行的连接杆29先接触缓冲垫块23的缓冲支撑面P3，并被缓冲垫块23缓冲减速，使连接杆29不会直接碰撞软性电路板22及支撑板21，减少噪声的产生；在松开键帽27后，缓冲垫块23能够给连接杆29一个附加的回弹力，有利于键帽27快速回弹。同时，支撑板21下凹形成的容置部36可以容置厚度较大的缓冲垫块23，缓冲效果好且对键帽27的行程影响较小。
配合参见前述附图，对应前述设置联动杆31和补强杆30的情形，本实施例中的缓冲垫块23包括四个第一缓冲垫块23a和两个第二缓冲垫块23b。对应地，支撑板21的容置部36包括四个第一容置部36a和两个第二容置部36b，四个第一容置部36a用于对应容置四个第一缓冲垫块23a，两个第二容置部36b用于对应容置两个第二容置部36b。四个第一缓冲垫块 23a呈矩形分布于对应键帽27四角附近的位置，两个第二缓冲垫块23b沿平行于键帽27长向Y1间隔设置，且在沿键帽27的长向Y1上，两个第二缓冲垫块23b位于第一缓冲垫块23a之间；第二缓冲垫块23b为沿键帽27的宽向Y2延伸的条形结构。两个第二缓冲垫块23b分别和其在键帽27长向Y1临近的两第一缓冲垫块23a所限定的边之间限定安装空间Q2，两个支撑机构28分别位于两个安装空间Q2处。四个第一缓冲垫块23a分别对应于四个弯折部37，弯折部37指横杆段32和旋臂段33两者连接处相对弯折的部分杆段。补强杆30在第一表面P1的投影位于四个第一缓冲垫块23a围成的矩形内侧；两个第二缓冲垫分别对应补强杆30的长向两端，并分别沿平行于键帽27的宽向Y2延伸至对应于横杆段32下方的位置。该实现方式中，对于如键盘10的空格键27a等长键帽27b，通过联动杆31实现长键帽27b的刚性联动及通过补强杆30补强壁厚较薄的长键帽27b的刚度，并通过四个第一缓冲垫块23a和两个第二缓冲垫块23b实现联动杆31和补强杆30按压时的缓冲和按压结束后的回弹，能够有效降低按键时联动杆31/补强杆30直接撞击或摩擦软性电路板22或支撑板21产生的噪声，并减小回弹时间，使用体验好。
本实施例中的缓冲垫块23(第一缓冲垫块23a和/或第二缓冲垫块23b)采用硅胶、橡胶或其他弹性材料制成。
对于一些薄膜键盘10，其按键行程大致在1.8-2.0mm左右，此时可设置缓冲垫块23(第一缓冲垫块23a和/或第二缓冲垫块23b)的厚度为0.5-0.8mm，且缓冲垫块23凸出软性电路板22远离支撑板21一侧表面的缓冲支撑面P3的高度为缓冲垫块23厚度的1/4-1/3。此厚度的缓冲垫块23即能提供合适的缓冲空间和回弹力，缓冲垫块23厚度1/4-1/3的凸出也能在按键下行中被连接于键帽27上连接杆29(联动杆31和/或补强杆30)下压变形，进一步降低甚至完全消除凸出部分对按键整体行程的影响。如，采用柔性较大的缓冲垫块23时，下压按键的过程中对缓冲垫块23的压缩量达到其凸出厚度时，按键的整体行程将和未设置缓冲垫块23时一致。
在本实施例的一些实施方式中，第二缓冲垫块23b凸出软性电路板22的高度与第一缓冲垫块23a凸出软性电路板22的高度相等，以使按压键帽27时，联动杆31和第一缓冲垫块23a及第二缓冲垫块23b的接触同步于补强杆30和第二缓冲垫块23b的接触。该实施方式中，第一缓冲垫块23a的凸出高度等于第二缓冲垫块23b，使得按键时，联动杆31的四个弯折部37与对应的四个第一缓冲垫块23a接触、联动杆31的长杆段与第二缓冲垫块23b接触、补强杆30与第二缓冲垫块23b接触均同时进行，使得各处均能够得到可靠缓冲，最大可能降低各处碰撞或摩擦产生的噪声。且基于该结构，无论按压位置在长键帽27b的何处，长键帽27b都能平衡地下压和回弹，使用手感佳。
在另一些实施方式中，第二缓冲垫块23b凸出软性电路板22的高度小于第一缓冲垫块23a凸出软性电路板22的高度，以使按压键帽27时，联动杆31和第一缓冲垫块23a的接触先于补强杆30和第二缓冲垫块23b的接触。该实施方式中，按键时键帽27将受到两级缓冲，第一级缓冲为第一缓冲垫块23a对联动杆31的缓冲，第二级缓冲为第一级缓冲加上第二缓冲垫块23b对联动杆31和补强杆30的缓冲，从而形成力度逐级增大的缓冲，使用手感更佳；此外，联动杆31和第一缓冲垫块23a先接触能够保证长键帽27b按键平稳，而不会出现位于长键帽27b长向中间位置的第二缓冲垫块23b和补强杆30先接触时更可能出现的长键帽27b一侧翘起的现象。在该实施方式中，可选地，第一容置部36a的凹入深度小于第二容置部36b 的凹入深度，和/或：第一缓冲垫块23a的厚度大于第二缓冲垫块23b的厚度，以实现第二缓冲垫块23b的凸出高度小于第一缓冲垫块23a。
本实施例中，可选地，在支撑机构28和软性电路板22之间设有第三缓冲垫块38，在键帽27和支撑机构28之间设有第四缓冲垫块39，用于降低按键时，键帽27和支撑机构28之间、支撑机构28和软性电路板22之间的噪声。第四缓冲垫块39可以通过粘接或其他方式固定在键帽27对应支撑机构28的一侧，也可以固定在支撑机构28对应键帽27一侧的表面。第三缓冲垫块38可以贴合于软性电路板22的表面并对应于支撑机构28。本实施例中，第三缓冲垫块38和第四缓冲垫块39可采用硅胶、橡胶或其他弹性材料制成。
本申请的一个实施例中，键盘10包括多个长宽比较大(如长宽比在1.5以上)的长键帽27b和多个普通键帽27c。长键帽27b包括如空格键27a、回格键、CTRL键等，普通键帽27c包括字母键、数字键等。其中，长键帽27b采用前述按键组件20的设置方式设置，而普通键帽27c则仅在其键帽27、支撑机构28和软性电路板22之间参照设置前述的第三缓冲垫块38和第四缓冲垫块39。如此，得到一各个按键的按键噪声都能有效控制的键盘，有利于需要安静使用键盘的环境。
以上实施方式仅用以说明本申请的技术方案而非限制，尽管参照以上较佳实施方式对本申请进行了详细说明，本领域的普通技术人员应当理解，可以对本申请的技术方案进行修改或等同替换都不应脱离本申请技术方案的精神和范围。

Claims (10)

  1. 一种按键组件，其特征在于，包括：
    支撑板，所述支撑板具有相背的第一表面和第二表面；所述支撑板具有从第一表面向第二表面一侧下凹的容置部，所述容置部限定容置槽；
    软性电路板，所述软性电路板叠设于所述第一表面，所述软性电路板具有对应连通所述容置槽的过孔；
    缓冲垫块，所述缓冲垫块设置于所述容置槽，并穿出所述过孔；所述缓冲垫块具有凸出所述软性电路板远离所述支撑板一侧表面的缓冲支撑面；
    按压组件，所述按压组件包括键帽、支撑机构和连接杆；所述键帽通过所述支撑机构可活动地支撑于所述支撑板，以使所述键帽能够被按压或回弹；所述连接杆连接于所述键帽，且至少部分和所述缓冲垫块对应。
  2. 根据权利要求1所述的按键组件，其特征在于：
    所述按键组件还包括背光组件，所述背光组件叠设于所述支撑板的第二表面；
    所述背光组件具有让位孔，所述让位孔对应于所述容置部，所述容置部至少部分容置于所述让位孔。
  3. 根据权利要求1所述的按键组件，其特征在于：
    所述缓冲垫块的厚度为0.5-0.8mm，且所述缓冲垫块凸出所述软性电路板远离所述支撑板一侧表面的缓冲支撑面的高度为所述缓冲垫块厚度的1/4-1/3。
  4. 根据权利要求1所述的按键组件，其特征在于：
    所述键帽为长键帽，所述键帽的长度大于宽度；
    所述按压组件包括两个支撑机构，两个所述支撑机构分别支撑于所述键帽的长向两端附近；所述连接杆包括补强杆和两个联动杆，两个所述联动杆沿所述键帽的宽向中面镜像对称设置；所述联动杆包括横杆段和分别从所述横杆段的两端弯折延伸形成的两个旋臂段，所述横杆段通过两所述旋臂段可转动地配合于所述支撑板；所述补强杆整体沿所述键帽的长向延伸并固定连接于所述键帽朝向所述软性电路板的一侧表面；
    所述缓冲垫块包括四个第一缓冲垫块和两个第二缓冲垫块；所述支撑板的容置部包括四个第一容置部和两个第二容置部，四个所述第一容置部用于对应容置四个所述第一缓冲垫块，两个所述第二容置部用于对应容置两个所述第二容置部；
    四个所述第一缓冲垫块呈矩形分布于对应所述键帽四角附近的位置，两个所述第二缓冲垫块沿平行于所述键帽的长度的方向间隔设置，且在沿所述键帽的长度方向上，两个所述第二缓冲垫块位于所述第一缓冲垫块之间；所述第二缓冲垫块为沿所述键帽的宽向延伸的条形结构；
    两个所述第二缓冲垫块分别和其在键帽长向临近的两第一缓冲垫块所限定的边之间限定安装空间，两个所述支撑机构分别位于两个所述安装空间处；
    四个所述第一缓冲垫块分别对应于四个弯折部，所述弯折部指所述横杆段和所述旋臂段两者连接处相对弯折的部分杆段；
    所述补强杆在所述第一表面的投影位于四个所述第一缓冲垫块围成的矩形内侧；两个所述第二缓冲垫分别对应所述补强杆的长向两端，并分别沿平行于所述键帽的宽向延伸至对应于所述横杆段下方的位置。
  5. 根据权利要求4所述的按键组件，其特征在于：
    所述第二缓冲垫块凸出所述软性电路板的高度与所述第一缓冲垫块凸出所述软性电路板的高度相等，以使按压键帽时，所述联动杆和所述第一缓冲垫块及所述第二缓冲垫块的接触同步于所述补强杆和所述第二缓冲垫块的接触。
  6. 根据权利要求1所述的按键组件，其特征在于：
    所述连接杆包括两个联动杆，两个所述联动杆沿所述键帽的宽向中面镜像对称设置；
    所述联动杆包括横杆段和分别从所述横杆段的两端弯折延伸形成的两个旋臂段，所述横杆段通过两所述旋臂段可转动地配合于所述支撑板；
    所述缓冲垫块包括四个第一缓冲垫块，四个所述第一缓冲垫块呈矩形分布，且四个所述第一缓冲垫块分别对应于四个弯折部，所述弯折部指所述横杆段和所述旋臂段两者连接处相对弯折的部分杆段。
  7. 根据权利要求6所述的按键组件，其特征在于：
    所述连接杆还包括补强杆，所述补强杆整体沿所述键帽的长向延伸并固定连接于所述键帽朝向所述软性电路板的一侧表面；所述补强杆在所述第一表面的投影位于四个所述第一缓冲垫块围成的矩形内侧；
    所述缓冲垫块还包括两个第二缓冲垫块，两个所述第二缓冲垫沿所述键帽的长向彼此间隔地设置，并分别对应所述补强杆的长向两端；所述第二缓冲垫沿平行于所述键帽的宽向延伸至对应于所述横杆段的下方的位置。
  8. 根据权利要求1所述的按键组件，其特征在于：
    所述缓冲垫块采用硅胶或橡胶材料制成。
  9. 根据权利要求1所述的按键组件，其特征在于：
    所述支撑机构为剪刀脚机构；所述支撑机构和所述软性电路板之间设有第三缓冲垫块；所述键帽对应所述支撑机构处设有第四缓冲垫块。
  10. 一种键盘，其特征在于，包括：
    壳体，所述壳体围成内部空间，且所述壳体开设有键孔；
    权利要求1-9任一项所述的按键组件；
    所述按键组件安装于所述内部空间，且所述键帽通过所述键孔凸出所述内部空间之外。
PCT/CN2022/113753 2021-12-24 2022-08-19 按键组件及键盘 WO2023116002A1 (zh)

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