WO2016183982A1 - 剪刀脚键盘的按键结构 - Google Patents

剪刀脚键盘的按键结构 Download PDF

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Publication number
WO2016183982A1
WO2016183982A1 PCT/CN2015/089817 CN2015089817W WO2016183982A1 WO 2016183982 A1 WO2016183982 A1 WO 2016183982A1 CN 2015089817 W CN2015089817 W CN 2015089817W WO 2016183982 A1 WO2016183982 A1 WO 2016183982A1
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WO
WIPO (PCT)
Prior art keywords
bracket
elastic member
circuit board
thin film
scissor
Prior art date
Application number
PCT/CN2015/089817
Other languages
English (en)
French (fr)
Inventor
骆星
黄勇超
Original Assignee
深圳市多精彩电子科技有限公司
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Publication date
Application filed by 深圳市多精彩电子科技有限公司 filed Critical 深圳市多精彩电子科技有限公司
Publication of WO2016183982A1 publication Critical patent/WO2016183982A1/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
    • H01H13/702—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
    • H01H2223/00—Casings
    • H01H2223/042—Casings mounted in conventional keyboard
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2231/00—Applications
    • H01H2231/002—Calculator, computer

Definitions

  • the present invention relates to the field of keyboard technology, and in particular, to a button structure of a scissors foot keyboard.
  • keyboards are also widely used as a typical input device for electronic products such as notebook computers and tablet computers.
  • the keyboard structure is also developing toward miniaturization and thinning.
  • Many existing button structures can no longer meet the ultra-thin requirements of electronic products.
  • the tapping force in the upper left corner, the upper right corner, the lower left corner, the lower right corner, and the center of the button is large and uneven, and it is easy to use for a long time. Fatigue occurs, the hand feels relatively uncomfortable, and the sound when struck is also large.
  • the object of the present invention is to provide a button structure of a scissors foot keyboard.
  • the thickness of the whole button is thin, the stroke is large, and the hand feel is good, which satisfies the ultra-thin requirements of the electronic product, and the tapping force at each position of the key cap is small when used. Balanced, comfortable to the touch, small sound, and simple structure.
  • the present invention provides a key structure of a scissor keyboard, comprising: a base, a thin film circuit board disposed on the base, an elastic member disposed on the thin film circuit board, and the elastic member.
  • a scissor foot bracket mounted on the base and a key cap mounted on the scissor foot bracket; the scissor foot bracket including an inner bracket and an outer bracket rotatably coupled to an outer side of the inner bracket; An empty portion is formed below the rotating joint of the inner bracket and the outer bracket, and the elastic member is located in the overhead portion;
  • the inner bracket and the outer bracket of the scissor foot bracket constitute a double lever mechanism, and the inner bracket is provided with a convex portion toward a side of the elastic member as a pressing point for pressing the elastic member, the convex portion Located between the two sides of the inner bracket and the rotating joint of the outer bracket, the thin film circuit board has circuit contacts, and the elastic member is correspondingly disposed on the circuit contact, and when the key cap is pressed, the convexity of the scissor foot bracket is The upper portion presses the elastic member, and the elastic member presses the thin film circuit board to bring the circuit contacts of the thin film circuit board into contact.
  • the base is provided with two first hollow portions arranged symmetrically, and the inner peripheral surface of the first hollow portion is provided with a first groove near the inner side of the base; the opposite side of the first groove is provided a first hook portion connected to an inner peripheral surface of the first hollow portion and perpendicular to a surface of the base; the same side of the first recess is provided with an inner circumference connected to the first hollow portion a second hook portion perpendicular to a surface of the base; the second hook portion is located on a side of the first hollow portion away from the first hook portion, the second hook portion is The first hooks are bent in opposite directions.
  • the film circuit board is provided with two second hollow portions which are symmetrically disposed and respectively correspond to the two first hollow portions; the inner peripheral surface of the second hollow portion is respectively provided with a second recess, a third groove, wherein the position of the second groove corresponds to a position of the first groove, and a position of the fourth groove corresponds to a position of the second hook
  • the third recess is disposed on the opposite side of the fourth recess; the first hook portion and the second hook portion on the base are located on the inner side of the second hollow portion with respect to the thin film circuit board;
  • the height of the first hook portion and the second hook portion is greater than the thickness of the thin film circuit board; the area between the two second hollow portions on the thin film circuit board is provided with circuit contacts, and the elastic member corresponds to the cover Provided on the circuit contacts.
  • the opposite end faces of the inner bracket are respectively provided with a first connection portion symmetrically distributed, a second connection portion, and a third connection portion between the first connection portion and the second connection portion; the inner bracket faces the elasticity
  • the surface of the piece is provided with a receiving portion, and the protruding portion is disposed in the receiving portion and located between the two sides of the inner bracket and the rotating joint of the outer bracket.
  • the outer bracket is a frame body, and the opposite ends of the outer brackets are respectively provided with a fourth connecting portion and a fifth connecting portion which are symmetrically distributed, and the inner peripheral surface of the outer bracket is provided with two first connecting slots symmetrically distributed.
  • the first connecting groove is located between the fourth connecting portion and the fifth connecting portion; and the third connecting portion is installed in the first connecting groove.
  • the key cap is a casing, and the inner surface of the key cap is provided with a first mounting portion corresponding to the fourth connecting portion, and a second mounting portion is disposed corresponding to the second connecting portion.
  • the fourth connecting portion is slidably coupled to the first mounting portion, the second connecting portion is rotatably coupled to the second mounting portion, and the first connecting portion is rotatably coupled to the second hook portion And sliding between the second hook portion and the thin film circuit board; the fifth connecting portion is rotatably connected to the first hook portion and abuts against the thin film circuit board.
  • the elastic member includes an annular support portion and an elastic pressing portion connected to the top of the support portion, and the support portion is correspondingly disposed on a periphery of a circuit contact on the thin film circuit board,
  • the elastic pressing portion is disposed opposite to the circuit contact of the thin film circuit board and has a gap;
  • the elastic member is made of silicone, metal, or plastic.
  • the inner bracket is provided with two third hollow portions penetrating the upper and lower surfaces of the inner bracket.
  • the inner bracket is provided with a plurality of through holes penetrating the upper and lower surfaces of the inner bracket.
  • the invention has the advantages that the overhead portion is formed under the rotating joint between the inner bracket and the outer bracket of the scissor foot bracket, and an elastic member is arranged in the overhead portion, and the inner bracket and the outer bracket of the scissor foot bracket constitute a double lever mechanism, and the elastic member
  • the corresponding cover is disposed on the circuit contact of the thin film circuit board, and the inner bracket is disposed on one side of the elastic member as a pressing point of pressing the elastic member, so that the thickness of the entire button is thinner, the stroke is larger, and the hand feel is better;
  • the convex portion of the scissor foot support presses the elastic member, and the elastic member presses the thin film circuit board to make the circuit contact of the thin film circuit board contact and conduct, thereby realizing the function of keyboard input, thereby reducing the thickness of the keyboard
  • the tapping force at each position of the keycap is small and balanced during use, the hand feels comfortable, the sound is small, and the structure is simple.
  • FIG. 1 is a side view showing the structure of a key structure of a scissors foot keyboard of the present invention
  • FIG. 2 is a cross-sectional view showing the key structure of the scissors foot keyboard of the present invention
  • FIG. 3 is a schematic exploded view of a first embodiment of a key structure of a scissor foot keyboard of the present invention
  • FIG. 4 is a schematic perspective structural view of a base of a key structure of a scissor foot keyboard of the present invention.
  • FIG. 5 is a perspective structural view of a thin film circuit board of a key structure of a scissor foot keyboard of the present invention.
  • FIG. 6 is a top plan view showing the base of the key structure of the scissor-foot keyboard of the present invention, the thin film circuit board and the elastic member after installation;
  • Figure 7 is a cross-sectional view taken along line A-A of Figure 6;
  • Figure 8 is a perspective view showing the structure of the inner bracket of the first embodiment of the key structure of the scissor-foot keyboard of the present invention.
  • FIG. 9 is a top plan view of the inner bracket of the first embodiment of the key structure of the scissor keyboard of the present invention.
  • Figure 10 is a cross-sectional view taken along line B-B of Figure 9;
  • Figure 11 is a perspective view showing the three-dimensional structure of the outer frame of the key structure of the scissors foot keyboard of the present invention.
  • Figure 12 is a top plan view of the outer bracket of the key structure of the scissors foot keyboard of the present invention.
  • Figure 13 is a cross-sectional view taken along line C-C of Figure 12;
  • Figure 14 is a bottom plan view showing the outer bracket of the key structure of the scissors foot keyboard of the present invention.
  • Figure 15 is a perspective view showing the key structure of the key structure of the scissors foot keyboard of the present invention.
  • Figure 16 is a bottom view of the keycap of the key structure of the scissors foot keyboard of the present invention.
  • Figure 17 is a cross-sectional view taken along line D-D of Figure 16;
  • FIG. 19 is a force analysis diagram of a key structure of a scissors foot keyboard of the present invention.
  • FIG. 20 is a schematic exploded view of a second embodiment of the key structure of the scissor-foot keyboard of the present invention.
  • Figure 21 is a schematic exploded view of a third embodiment of the key structure of the scissor-foot keyboard of the present invention.
  • the present invention provides a key structure of a scissors foot keyboard, comprising: a base 1 , a thin film circuit board 2 disposed on the base 1 , and an elastic member disposed on the thin film circuit board 2 .
  • a scissor foot support 4 disposed above the elastic member 3 and mounted on the base 1, and a key cap 5 mounted on the scissor foot support 4; the scissor foot support 4 includes an inner bracket 41, And an outer bracket 42 rotatably connected to the outer side of the inner bracket 41; an empty portion 43 is formed below the rotational joint of the inner bracket 41 and the outer bracket 42, and the elastic member 3 is located in the overhead portion 43.
  • the inner bracket 41 and the outer bracket 42 of the scissor foot support 4 constitute a double lever mechanism, and the inner bracket 41 is provided with a convex portion 415 toward a side of the elastic member 3 as a pressing point for pressing the elastic member 3,
  • the protrusion 415 is located between the two sides of the inner bracket 41 and the rotating joint of the outer bracket 42 .
  • the protrusion 415 is located between the two sides of the inner bracket 41 and the rotating joint of the outer bracket 42 .
  • the thin film circuit board 2 has circuit contacts (not shown), and the elastic member 3 is correspondingly disposed on the circuit contacts.
  • the convex portion 415 of the scissor foot support 4 presses the elastic member 3
  • the elastic member 3 presses the thin film circuit board 2 to bring the circuit contacts of the thin film circuit board into contact.
  • the protrusion 415 serves as a contact for pressing the elastic member 3, and is disposed on the inner bracket 41 of the scissor foot support 4, so that the thickness of the entire button is thinner, the stroke is larger, the hand feel is better, and the electronic product can be satisfied. Thin and light demand.
  • the base 1 is provided with two first hollow portions 11 arranged symmetrically, and the inner peripheral surface of the first hollow portion 11 is disposed near the inner side of the base 1 with a first recess 12;
  • the first side of the first recess 12 is provided with a first hook portion 13 connected to the inner peripheral surface of the first hollow portion 11 and perpendicular to the surface of the base 1;
  • the first recess 12 a second hook portion 14 connected to an inner peripheral surface of the first hollow portion 11 and perpendicular to a surface of the base 1 is disposed on the same side;
  • the second hook portion 14 is located in the first hollow portion 11 Along from the side of the first hook portion 13, the second hook portion 14 is opposite to the bending direction of the first hook portion 13.
  • first hook portion 13 and the second hook portion 14 are connected to the bottom of the scissor foot support 4 to enable the scissor foot support 4 to rotate relative to the base 1.
  • the shape of the first hollow portion 11 and the first groove 12 is adapted to the shape of the scissor foot support 4 to prevent the scissor foot support 4 from interfering with the base 1 when rotated relative to the base 1.
  • the thin film circuit board 2 is provided with two second hollow portions 21 which are symmetrically disposed and respectively correspond to the two first hollow portions 11 ; the second hollow portion 21
  • the inner circumferential surface is respectively provided with a second groove 22, a third groove 23, and a fourth groove 24, the position of the second groove 22 corresponding to the position of the first groove 12,
  • the position of the fourth groove 24 corresponds to the position of the second hook portion 14,
  • the third groove 23 is disposed on the opposite side of the fourth groove 24;
  • the second hook portion 14 is located on the inner side of the second hollow portion 21 with respect to the thin film circuit board 2; the height of the first hook portion 13 and the second hook portion 14 is greater than the thickness of the thin film circuit board 2
  • the first hook portion 13 and the second hook portion 14 can protrude from the second hollow portion 21 to facilitate the mounting of the scissor foot bracket 4.
  • the shapes of the second groove 22, the third groove 23, and the fourth groove 24 are adapted to the scissor foot support 4 to prevent the scissor foot support 4 from interfering with the thin film circuit board 2 when rotated relative to the base 1. After the button is pressed down, the scissor foot holder 4 can be pressed flat on the film circuit board 2.
  • the area between the two second hollow portions 21 on the thin film circuit board 2 is provided with circuit contacts, and the elastic members 3 are correspondingly disposed on the circuit contacts.
  • the opposite end faces of the inner bracket 41 are respectively provided with a first connecting portion 411 symmetrically distributed, a second connecting portion 412 , and a first connecting portion 411 and a second connecting portion 412 .
  • a third connecting portion 413; the inner bracket 41 is disposed on the surface of the elastic member 3, and the receiving portion 414 is disposed in the receiving portion 414, and is located in the inner bracket 41
  • An intermediate position between the rotational connection of the side and outer brackets 42 ensures that the raised portion 415 can be accurately pressed onto the circuit contacts on the thin film circuit board 2 when the button is pressed.
  • the elastic member 3 includes an annular support portion 31 and an elastic pressing portion 32 connected to the top of the support portion 31.
  • the support portion 31 is disposed on a circuit contact of the thin film circuit board 2.
  • the elastic pressing portion 32 is opposite to the circuit contact of the thin film circuit board 2 Set and leave a gap.
  • the elastic member 3 is located inside the accommodating portion 414, and the convex portion 415 presses the elastic pressing portion 32 of the elastic member 3, so that the elastic pressing portion 32 presses the film circuit board 2, so that the elastic pressing portion 32 presses the film circuit board 2
  • the circuit contacts of the thin film circuit board 2 are in contact with each other to realize an input function.
  • the material of the elastic member 3 may be metal.
  • Metal elastic members have good properties such as long service life and high temperature resistance.
  • the material of the elastic member 3 may also be plastic.
  • Plastic elastic parts are less expensive than metal elastic parts.
  • the material of the elastic member 3 may also be silica gel.
  • the silicone elastic member is lower in cost than the metal elastic member and can be bonded to the thin film circuit board 2 for ease of production and assembly.
  • the silicone elastic member is more resistant to high temperature and longer service life than the plastic elastic member, and the silicone elastic member is a soft material colloid, which can play a buffering role when contacting the thin film circuit board 2 during use, and improve the thin film circuit board 2 The service life, which increases the life of the entire keyboard.
  • the supporting portion 31 can be connected to the adjacent supporting portion through the connecting member, so that all the elastic members 3 used in the keyboard are connected into a whole piece, which is beneficial to the whole. Production assembly of the keyboard.
  • the outer bracket 42 is a frame body, and the opposite ends of the outer bracket 42 are respectively provided with a fourth connecting portion 421 and a fifth connecting portion 422 which are symmetrically distributed, and the inner circumference of the outer bracket 42
  • the first connecting groove 423 is disposed between the fourth connecting portion 421 and the fifth connecting portion 422; the third connecting portion 413 is mounted on the surface In a connecting groove 423, the rotational connection of the inner bracket 41 and the outer bracket 42 is achieved.
  • the key cap 5 is a casing, and the inner surface of the key cap 5 is provided with a first mounting portion 51 corresponding to the fourth connecting portion 421 , and corresponding to the second connecting portion 412 .
  • the second mounting portion 52 is provided.
  • the fourth connecting portion 421 is slidably connected to the first mounting portion 51, and the second connecting portion 412 is rotatably coupled to the second mounting portion 52, thereby mounting the keycap 5 on the scissors foot.
  • the bracket 4 Since the inner bracket 41 and the outer bracket 42 constituting the scissor foot bracket 4 have an "X"-shaped structure, the upper key cap 5 can be balanced. Therefore, when the keycap 5 is pressed, the tapping force at each position on the keycap 5 is small and balanced, and the user presses any point on the keycap 5, and the button moves downward in a balanced manner.
  • the first connecting portion 411 is rotatably coupled to the second hook portion 14 and slidable between the second hook portion 14 and the thin film circuit board 2; the fifth connecting portion 422 is rotatably connected to The first hook portion 13 abuts against the thin film circuit board 2 to rotatably connect the scissor foot support 4 between the base 1 and the keycap 5.
  • the connection structure of the scissor foot support 4 with the keycap 5 and the base 1 can be realized by the prior art.
  • FIG. 18 is a working principle diagram of the key structure of the scissors foot keyboard of the present invention.
  • the inner bracket 41 and the outer bracket 42 rotatably coupled to the outer side of the inner bracket 41 constitute a double lever mechanism, wherein the positions of the inner bracket 41 and the outer bracket 42 and the keycap 5 are connected to each other as the first power point M and the second The power point N, the position at which the outer bracket 42 and the inner bracket 41 are connected to the base 1 are respectively taken as the first fulcrum P and the second fulcrum Q, and the convex portion 415 on the inner bracket 41 serves as the resistance point E.
  • the fifth connecting portion 422 rotates in the first hook portion 13 , and the fourth connecting portion 421 slides outside the key cap 5 in the first mounting portion 51, thereby
  • the first power point M and the second power point N on the scissor foot support 4 simultaneously move downward, and under the action of the first pivot point P and the second pivot point Q on the scissor foot support 4, the inner bracket 41 of the scissor foot support
  • the upper resistance point E moves downward, and the elastic member 3 is elastically deformed by the downward pressure generated by the resistance point E, that is, the convex portion 415, and is pressed to the circuit contact on the thin film circuit board 2, thereby realizing the keyboard input.
  • FIG. 19 is a force analysis diagram of the button structure of the scissors foot keyboard of the present invention.
  • a and b represent the distance between the first fulcrum P and the second power point N to the resistance point E, respectively, and S1 and S2 respectively represent the resistance point E and the second power point N in the vertical direction when the button is depressed.
  • the button structure of the scissors foot keyboard of the invention not only saves labor, but also reduces the thickness of the keyboard of the notebook computer and the tablet computer, and meets the ultra-thin requirements of the electronic product.
  • FIG. 20 is a schematic exploded view of a second embodiment of the key structure of the scissor-foot keyboard of the present invention.
  • the inner bracket 41' is provided with two third hollow portions 401 penetrating the upper and lower surfaces of the inner bracket 41', and the protruding portion 415 is disposed on the inner bracket. 41' between the two sides and the rotational joint of the outer bracket 42.
  • the third hollow portion 401 on the inner bracket 41' the material is saved and the production cost is reduced as compared with the solid inner bracket 41 in the first embodiment.
  • the remaining structure and principle of the second embodiment of the key structure of the scissor keyboard are the same as those of the first embodiment, and details are not described herein again.
  • FIG. 21 is a schematic exploded view of a third embodiment of the key structure of the scissor-foot keyboard of the present invention.
  • the inner bracket 41 ′′ is provided with a plurality of through holes 402 penetrating the upper and lower surfaces of the inner bracket 41 ′′, and the protrusion 415 is disposed on the inner bracket 41 ” Between the two sides and the rotational joint of the outer bracket 42.
  • the material is saved and the production is reduced as compared with the solid inner bracket 41 in the first embodiment. Cost; compared with the inner bracket 41' in the second embodiment, while saving material, It is proved that the inner bracket 41" has sufficient strength.
  • the remaining structure and principle of the third embodiment of the key structure of the scissor keyboard are the same as those of the first embodiment, and details are not described herein again.
  • an overhead portion is formed below the rotating joint between the inner bracket and the outer bracket of the scissor foot bracket, and an elastic member is disposed in the overhead portion, and the inner bracket and the outer bracket of the scissor foot bracket are provided.
  • the double lever mechanism is configured, and the elastic member is disposed on the circuit contact of the thin film circuit board, and the inner bracket is provided with a convex portion toward one side of the elastic member as a pressing point of pressing the elastic member, so that the thickness of the entire button is thinner.
  • the stroke is larger and the hand feel is better; when the key cap is pressed, the convex portion of the scissor foot support presses the elastic member, and the elastic member presses the thin film circuit board to make the circuit contact of the thin film circuit board contact and conduct, thereby realizing the function of keyboard input, thereby
  • the invention can reduce the thickness of the keyboard and meet the ultra-thin requirements of the electronic product. When used, the tapping force at each position of the key cap is small and balanced, the hand feel is comfortable, the sound is small, and the structure is simple.

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Abstract

一种剪刀脚键盘的按键结构，包括：底座(1)、设于底座(1)上的薄膜电路板(2)、设于薄膜电路板(2)上的弹性件(3)、设于弹性件(3)上方且安装于所述底座(1)上的剪刀脚支架(4)、及安装于剪刀脚支架(4)上的键帽(5)；剪刀脚支架(4)包括内支架(41)、及转动连接于内支架(41)外侧的外支架(42)；内支架(41)与外支架(42)转动连接处下方形成一架空部(43)，弹性件(3)位于架空部(43)内；剪刀脚支架(4)的内支架(41)与外支架(42)构成双杠杆机构，内支架(41)朝向弹性件(3)的一侧设有凸起部(415)，薄膜电路板(2)具有电路触点，弹性件(3)对应罩设于电路触点上，当按压键帽(5)，剪刀脚支架(4)的凸起部(415)按压弹性件(3)，弹性件(3)按压薄膜电路板(2)使薄膜电路板的电路触点接触导通。利用剪刀脚双杠杆机构，将按压弹性件的按压点设在剪刀脚支架的内支架上，使得整个按键的厚度更薄，行程更大，手感更好，满足电子产品超轻薄的需求，使用时在键帽的各个位置的敲击力道较小且均衡，手感舒适，声音较小，且结构简单。

Description

剪刀脚键盘的按键结构 技术领域
本发明涉及键盘技术领域，尤其涉及一种剪刀脚键盘的按键结构。
背景技术
随着信息技术的发展和人们对便携式电子产品的不断追求，键盘也因作为笔记本电脑和平板电脑等电子产品的一种典型的输入设备被广泛地使用。
随着技术的不断创新和用户对电子产品的科技感的不断追求，键盘结构也正朝向小型化以及薄型化发展，许多现有的按键结构已经不能满足电子产品超轻薄的需求。另外，许多现有结构的键盘在使用过程中，按压键帽时，在左上角、右上角、左下角、右下角以及按键中心五个部位的敲击力道较大并且不均衡，长时间使用容易产生疲劳，手感相对不舒适，敲击时的声音也较大。
因此，有必要对现有键盘按键结构做进一步改进，在确保按键有良好的使用手感的基础上，满足目前市场上的电子产品超轻薄的需求，在一定程度上降低笔记本电脑和平板电脑键盘的厚度，节省电子产品的空间，使产品更具科技感，满足用户的使用需求，为人们的生活带来更加便捷的服务。
发明内容
本发明的目的在于提供一种剪刀脚键盘的按键结构，整个按键的厚度薄，行程大，手感好，满足电子产品超轻薄的需求，使用时在键帽的各个位置的敲击力道较小且均衡，手感舒适，声音较小，且结构简单。
为实现上述目的，本发明提供一种剪刀脚键盘的按键结构，包括：底座、设于所述底座上的薄膜电路板、设于所述薄膜电路板上的弹性件、设于所述弹性件上方且安装于所述底座上的剪刀脚支架、及安装于所述剪刀脚支架上的键帽；所述剪刀脚支架包括内支架、及转动连接于所述内支架外侧的外支架；所述内支架与外支架转动连接处下方形成一架空部，所述弹性件位于所述架空部内；
所述剪刀脚支架的内支架与外支架构成双杠杆机构，所述内支架朝向所述弹性件的一侧设有凸起部作为按压所述弹性件的按压点，所述凸起部 位于所述内支架两侧与外支架的转动连接处之间，所述薄膜电路板具有电路触点，所述弹性件对应罩设于电路触点上，当按压键帽，剪刀脚支架的凸起部按压弹性件，弹性件按压薄膜电路板使薄膜电路板的电路触点接触导通。
所述底座上设有呈对称设置的两个第一镂空部，所述第一镂空部的内周面靠近所述底座的内侧设有第一凹槽；所述第一凹槽的对侧设有连接于所述第一镂空部的内周面且与所述底座的表面相垂直的第一钩部；所述第一凹槽的同侧设有连接于所述第一镂空部的内周面且与所述底座的表面相垂直的第二钩部；所述第二钩部位于所述第一镂空部中远离所述第一钩部的一侧，所述第二钩部与所述第一钩部的弯曲方向相反。
所述薄膜电路板上设有呈对称设置且分别与所述两个第一镂空部相对应的两个第二镂空部；所述第二镂空部的内周面分别设有第二凹槽、第三凹槽、及第四凹槽，所述第二凹槽的位置与所述第一凹槽的位置相对应，所述第四凹槽的位置与所述第二钩部的位置相对应，所述第三凹槽设于所述第四凹槽对侧；所述底座上的第一钩部、第二钩部均相对于所述薄膜电路板位于所述第二镂空部的内侧；所述第一钩部、第二钩部的高度大于所述薄膜电路板的厚度；所述薄膜电路板上两个第二镂空部之间的区域设有电路触点，所述弹性件对应罩设于所述电路触点上。
所述内支架的相对端面分别设有对称分布的第一连接部、第二连接部、及位于第一连接部与第二连接部之间的第三连接部；所述内支架朝向所述弹性件的表面设有容置部，所述凸起部设于所述容置部中，且位于所述内支架两侧与外支架的转动连接处之间。
所述外支架呈框体，所述外支架相对端面分别设有对称分布的第四连接部、第五连接部，所述外支架的内周面设有对称分布的两个第一连接槽，所述第一连接槽位于所述第四连接部、第五连接部之间；所述第三连接部安装于所述第一连接槽中。
所述键帽呈壳体，所述键帽内表面对应所述第四连接部设有第一安装部，对应所述第二连接部设有第二安装部。
所述第四连接部滑动连接于所述第一安装部中，所述第二连接部转动连接于所述第二安装部中，所述第一连接部转动连接于所述第二钩部中，并可在所述第二钩部与所述薄膜电路板之间滑动；所述第五连接部转动连接于所述第一钩部中，并抵靠于所述薄膜电路板上。
所述弹性件包括呈环形的支撑部、及连接于所述支撑部顶部的弹性按压部，所述支撑部对应设于所述薄膜电路板上一个电路触点的外围，所述 弹性按压部与所述薄膜电路板的电路触点相对设置且留有间隙；所述弹性件的材料为硅胶、金属、或塑胶。
所述内支架上设有贯穿所述内支架上下表面的两个第三镂空部。
所述内支架上设有贯穿所述内支架上下表面的数个通孔。
本发明的有益效果：本发明在于剪刀脚支架的内支架与外支架转动连接处下方形成架空部，并在架空部内设置弹性件，剪刀脚支架的内支架与外支架构成双杠杆机构，弹性件对应罩设于薄膜电路板的电路触点上，同时内支架朝向弹性件的一侧设置凸起部作为按压弹性件的按压点，使得整个按键的厚度更薄，行程更大，手感更好；当按压键帽，剪刀脚支架的凸起部按压弹性件，弹性件按压薄膜电路板使薄膜电路板的电路触点接触导通，实现键盘输入的功能，借此，本发明可降低键盘的厚度，满足电子产品超轻薄的需求，使用时在键帽的各个位置的敲击力道较小且均衡，手感舒适，声音较小，且结构简单。
附图说明
为了能更进一步了解本发明的特征以及技术内容，请参阅以下有关本发明的详细说明与附图，然而附图仅提供参考与说明用，并非用来对本发明加以限制。
附图中，
图1为本发明的剪刀脚键盘的按键结构的侧视结构示意图；
图2为本发明的剪刀脚键盘的按键结构的剖面示意图；
图3为本发明的剪刀脚键盘的按键结构的第一实施例的爆炸示意图；
图4为本发明的剪刀脚键盘的按键结构的底座的立体结构示意图；
图5为本发明的剪刀脚键盘的按键结构的薄膜电路板的立体结构示意图；
图6为本发明的剪刀脚键盘的按键结构的底座与薄膜电路板及弹性件安装后的俯视示意图；
图7为图6的A-A方向的剖面示意图；
图8为本发明的剪刀脚键盘的按键结构的第一实施例的内支架的立体结构示意图；
图9为本发明的剪刀脚键盘的按键结构的第一实施例的内支架的俯视示意图；
图10为图9的B-B方向的剖面示意图；
图11为本发明的剪刀脚键盘的按键结构的外支架的立体结构示意 图；
图12为本发明的剪刀脚键盘的按键结构的外支架的俯视示意图；
图13为图12的C-C方向的剖面示意图；
图14为本发明的剪刀脚键盘的按键结构的外支架的仰视示意图；
图15为本发明的剪刀脚键盘的按键结构的键帽的立体结构示意图；
图16为本发明的剪刀脚键盘的按键结构的键帽的仰视示意图；
图17为图16的D-D方向的剖面示意图；
图18为本发明的剪刀脚键盘的按键结构的工作原理图；
图19为本发明的剪刀脚键盘的按键结构的受力分析图；
图20为本发明的剪刀脚键盘的按键结构的第二实施例的爆炸示意图；
图21为本发明的剪刀脚键盘的按键结构的第三实施例的爆炸示意图。
具体实施方式
为更进一步阐述本发明所采取的技术手段及其效果，以下结合本发明的优选实施例及其附图进行详细描述。
请参阅图1至图3，本发明提供一种剪刀脚键盘的按键结构，包括：底座1、设于所述底座1上的薄膜电路板2、设于所述薄膜电路板2上的弹性件3、设于所述弹性件3上方且安装于所述底座1上的剪刀脚支架4、及安装于所述剪刀脚支架4上的键帽5；所述剪刀脚支架4包括内支架41、及转动连接于所述内支架41外侧的外支架42；所述内支架41与外支架42转动连接处下方形成一架空部43，所述弹性件3位于所述架空部43内。
所述剪刀脚支架4的内支架41与外支架42构成双杠杆机构，所述内支架41朝向所述弹性件3的一侧设有凸起部415作为按压所述弹性件3的按压点，所述凸起部415位于所述内支架41两侧与外支架42的转动连接处之间，优选所述凸起部415位于所述内支架41两侧与外支架42的转动连接处之间的中间位置。所述薄膜电路板2具有电路触点(未示出)，所述弹性件3对应罩设于电路触点上，当按压键帽5，剪刀脚支架4的凸起部415按压弹性件3，弹性件3按压薄膜电路板2使薄膜电路板的电路触点接触导通。所述凸起部415作为按压弹性件3的触点，设在所述剪刀脚支架4的内支架41上，使得整个按键的厚度更薄，行程更大，手感更好，可满足电子产品超轻薄的需求。
请参阅图4，所述底座1上设有呈对称设置的两个第一镂空部11，所述第一镂空部11的内周面靠近所述底座1的内侧设有第一凹槽12；所述第一凹槽12的对侧设有连接于所述第一镂空部11的内周面且与所述底座1的表面相垂直的第一钩部13；所述第一凹槽12的同侧设有连接于所述第一镂空部11的内周面且与所述底座1的表面相垂直的第二钩部14；所述第二钩部14位于所述第一镂空部11中远离所述第一钩部13的一侧，所述第二钩部14与所述第一钩部13的弯曲方向相反。
具体地，所述第一钩部13、第二钩部14用于与剪刀脚支架4的底部相连接，使剪刀脚支架4能够相对于底座1转动。所述第一镂空部11、第一凹槽12的形状与剪刀脚支架4的形状相适应，以避免剪刀脚支架4相对于底座1转动时与底座1产生干涉。
请参阅图5至图7，所述薄膜电路板2上设有呈对称设置且分别与所述两个第一镂空部11相对应的两个第二镂空部21；所述第二镂空部21的内周面分别设有第二凹槽22、第三凹槽23、及第四凹槽24，所述第二凹槽22的位置与所述第一凹槽12的位置相对应，所述第四凹槽24的位置与所述第二钩部14的位置相对应，所述第三凹槽23设于所述第四凹槽24对侧；所述底座1上的第一钩部13、第二钩部14均相对于所述薄膜电路板2位于所述第二镂空部21的内侧；所述第一钩部13、第二钩部14的高度大于所述薄膜电路板2的厚度，以保证薄膜电路板2安装于底座1上后，第一钩部13、第二钩部14可以从第二镂空部21中伸出，便于剪刀脚支架4的安装。所述第二凹槽22、第三凹槽23、及第四凹槽24的形状与剪刀脚支架4相适应，以避免剪刀脚支架4相对于底座1转动时与薄膜电路板2产生干涉，保证按键下压后，剪刀脚支架4可平整地被按压在薄膜电路板2上。所述薄膜电路板2上两个第二镂空部21之间的区域设有电路触点，所述弹性件3对应罩设于所述电路触点上。
请参阅图8至图10，所述内支架41的相对端面分别设有对称分布的第一连接部411、第二连接部412、及位于第一连接部411与第二连接部412之间的第三连接部413；所述内支架41朝向所述弹性件3的表面设有容置部414，所述凸起部415设于所述容置部414中，且位于所述内支架41两侧与外支架42的转动连接处之间的中间位置，以保证按压按键时凸起部415可以准确地按压到薄膜电路板2上的电路触点。
具体地，所述弹性件3包括呈环形的支撑部31、及连接于所述支撑部31顶部的弹性按压部32，所述支撑部31设于所述薄膜电路板2上一个电路触点的外围，所述弹性按压部32与所述薄膜电路板2的电路触点相对 设置且留有间隙。按键按下后，弹性件3位于所述容置部414的内部，所述凸起部415按压所述弹性件3的弹性按压部32，使所述弹性按压部32按压薄膜电路板2，使薄膜电路板2的电路触点接触导通，从而实现输入功能。
具体地，所述弹性件3的材料可以是金属。金属弹性件具有使用寿命长以及耐高温等良好特性。
具体地，所述弹性件3的材料也可以是塑胶。塑胶弹性件与金属弹性件相比，成本更低。
具体地，所述弹性件3的材料还可以是硅胶。硅胶弹性件与金属弹性件相比成本更低，并可以粘合在薄膜电路板2上，方便生产与组装。此外，硅胶弹性件比塑胶弹性件更耐高温，使用寿命更长，同时硅胶弹性件为软材质胶体，在使用过程中与薄膜电路板2接触时，可起到缓冲作用，提高薄膜电路板2的使用寿命，从而提高整个键盘的使用寿命。
值得一提的是，当所述弹性件3为硅胶或塑胶材料时，所述支撑部31可通过连接件与相邻支撑部进行连接，使得键盘所用的全部弹性件3连接成一整片，利于键盘的生产组装。
请参阅图11至图14，所述外支架42呈框体，所述外支架42相对端面分别设有对称分布的第四连接部421、第五连接部422，所述外支架42的内周面设有对称分布的两个第一连接槽423，所述第一连接槽423位于所述第四连接部421、第五连接部422之间；所述第三连接部413安装于所述第一连接槽423中，实现所述内支架41与外支架42的转动连接。
请参阅图15至图17，所述键帽5呈壳体，所述键帽5内表面对应所述第四连接部421设有第一安装部51，对应所述第二连接部412设有第二安装部52。
具体地，所述第四连接部421滑动连接于所述第一安装部51中，所述第二连接部412转动连接于所述第二安装部52中，从而将键帽5安装在剪刀脚支架4上。由于构成剪刀脚支架4的内支架41与外支架42呈“X”型结构，可对上方的键帽5起到平衡作用。因此，按压键帽5时，键帽5上的各个位置的敲击力道较小且均衡，用户按压键帽5上的任意一个点，按键都会平衡地向下运动。所述第一连接部411转动连接于所述第二钩部14中，并可在所述第二钩部14与所述薄膜电路板2之间滑动；所述第五连接部422转动连接于所述第一钩部13中，并抵靠于所述薄膜电路板2上，从而将剪刀脚支架4可转动地连接于底座1与键帽5之间。所述剪刀脚支架4与键帽5及底座1的连接结构可以采用现有的技术实现。
请参阅图18，为本发明的剪刀脚键盘的按键结构的工作原理图。内支架41、及转动连接于所述内支架41外侧的外支架42构成双杠杆机构，其中，内支架41和外支架42与键帽5相互连接的位置分别作为第一动力点M、第二动力点N，外支架42和内支架41与底座1相连接的位置分别作为第一支点P、第二支点Q，内支架41上的凸起部415作为阻力点E。当键帽5受到向下按压的压力F2时，键帽5向下运动，对于所述内支架41，所述第二连接部412在所述第二安装部52中转动，所述第一连接部411脱离所述第二钩部14向所述薄膜电路板2边缘滑动。对于所述外支架42，所述第五连接部422在所述第一钩部13中转动，所述第四连接部421在所述第一安装部51中向键帽5外侧滑动，从而便得剪刀脚支架4上的第一动力点M、第二动力点N同时向下运动，在剪刀脚支架4上的第一支点P、第二支点Q的作用下，剪刀脚支架的内支架41上的阻力点E向下运动，弹性件3受到阻力点E即凸起部415产生的向下的压力而发生弹性形变，并按压到薄膜电路板2上的电路触点，从而现实键盘输入的功能。
请参阅图19，为本发明的剪刀脚键盘的按键结构的受力分析图。结合图18，其中，a和b分别代表第一支点P和第二动力点N到阻力点E的距离，S1和S2分别代表按键压下时阻力点E和第二动力点N在竖直方向上通过的距离。优选的，在该实施例中，a＝b，则S1＝S2/2，即S2＝S1x2，根据S1xF1＝S2xF2，得出F2＝F1/2。假设S1＝0.25，F1＝110gf，则可以得出S2＝0.5，F2＝55gf。由此可见，本发明的剪刀脚键盘的按键结构既省力，又可降低笔记本电脑和平板电脑键盘的厚度，满足电子产品超轻薄的需求。
请参阅图20，为本发明的剪刀脚键盘的按键结构的第二实施例的爆炸示意图。其与上述第一实施例的区别在于，所述内支架41’上设有贯穿所述内支架41’上下表面的两个第三镂空部401，所述凸起部415设于所述内支架41’两侧与外支架42的转动连接处之间。通过在所述内支架41’上设置第三镂空部401，与第一实施例中实心的内支架41相比，节省了材料，降低了生产成本。该剪刀脚键盘的按键结构的第二实施例的其余结构及原理均与第一实施例相同，此处不再赘述。
请参阅图21，为本发明的剪刀脚键盘的按键结构的第三实施例的爆炸示意图。其与上述第一实施例的区别在于，所述内支架41”上设有贯穿所述内支架41”上下表面的数个通孔402，所述凸起部415设于所述内支架41”两侧与外支架42的转动连接处之间。通过在所述内支架41”上设置数个通孔402，与第一实施例中实心的内支架41相比，节省了材料，降低了生产成本；与第二实施例中的内支架41’相比，在节省材料的同时，又保 证了内支架41”具有足够的强度。该剪刀脚键盘的按键结构的第三实施例的其余结构及原理均与第一实施例相同，此处不再赘述。
综上所述，在本发明剪刀脚键盘的按键结构中，剪刀脚支架的内支架与外支架转动连接处下方形成架空部，并在架空部内设置弹性件，剪刀脚支架的内支架与外支架构成双杠杆机构，弹性件对应罩设于薄膜电路板的电路触点上，同时内支架朝向弹性件的一侧设置凸起部，作为按压弹性件的按压点，使得整个按键的厚度更薄，行程更大，手感更好；当按压键帽，剪刀脚支架的凸起部按压弹性件，弹性件按压薄膜电路板使薄膜电路板的电路触点接触导通，实现键盘输入的功能，借此，本发明可降低键盘的厚度，满足电子产品超轻薄的需求，使用时在键帽的各个位置的敲击力道较小且均衡，手感舒适，声音较小，且结构简单。
以上所述，对于本领域的普通技术人员来说，可以根据本发明的技术方案和技术构思作出其他各种相应的改变和变形，而所有这些改变和变形都应属于本发明后附的权利要求的保护范围。

Claims (10)

  1. 一种剪刀脚键盘的按键结构，包括：底座、设于所述底座上的薄膜电路板、设于所述薄膜电路板上的弹性件、设于所述弹性件上方且安装于所述底座上的剪刀脚支架、及安装于所述剪刀脚支架上的键帽；所述剪刀脚支架包括内支架、及转动连接于所述内支架外侧的外支架；所述内支架与外支架转动连接处下方形成一架空部，所述弹性件位于所述架空部内；
    所述剪刀脚支架的内支架与外支架构成双杠杆机构，所述内支架朝向所述弹性件的一侧设有凸起部作为按压所述弹性件的按压点，所述凸起部位于所述内支架两侧与外支架的转动连接处之间，所述薄膜电路板具有电路触点，所述弹性件对应罩设于电路触点上，当按压键帽，剪刀脚支架的凸起部按压弹性件，弹性件按压薄膜电路板使薄膜电路板的电路触点接触导通。
  2. 如权利要求1所述的剪刀脚键盘的按键结构，其中，所述底座上设有呈对称设置的两个第一镂空部，所述第一镂空部的内周面靠近所述底座的内侧设有第一凹槽；所述第一凹槽的对侧设有连接于所述第一镂空部的内周面且与所述底座的表面相垂直的第一钩部；所述第一凹槽的同侧设有连接于所述第一镂空部的内周面且与所述底座的表面相垂直的第二钩部；所述第二钩部位于所述第一镂空部中远离所述第一钩部的一侧，所述第二钩部与所述第一钩部的弯曲方向相反。
  3. 如权利要求2所述的剪刀脚键盘的按键结构，其中，所述薄膜电路板上设有呈对称设置且分别与所述两个第一镂空部相对应的两个第二镂空部；所述第二镂空部的内周面分别设有第二凹槽、第三凹槽、及第四凹槽，所述第二凹槽的位置与所述第一凹槽的位置相对应，所述第四凹槽的位置与所述第二钩部的位置相对应，所述第三凹槽设于所述第四凹槽对侧；所述底座上的第一钩部、第二钩部均相对于所述薄膜电路板位于所述第二镂空部的内侧；所述第一钩部、第二钩部的高度大于所述薄膜电路板的厚度；所述薄膜电路板上两个第二镂空部之间的区域设有电路触点，所述弹性件对应罩设于所述电路触点上。
  4. 如权利要求3所述的剪刀脚键盘的按键结构，其中，所述内支架的相对端面分别设有对称分布的第一连接部、第二连接部、及位于第一连接部与第二连接部之间的第三连接部；所述内支架朝向所述弹性件的表面 设有容置部，所述凸起部设于所述容置部中，且位于所述内支架两侧与外支架的转动连接处之间的中间位置。
  5. 如权利要求4所述的剪刀脚键盘的按键结构，其中，所述外支架呈框体，所述外支架相对端面分别设有对称分布的第四连接部、第五连接部，所述外支架的内周面设有对称分布的两个第一连接槽，所述第一连接槽位于所述第四连接部、第五连接部之间；所述第三连接部安装于所述第一连接槽中。
  6. 如权利要求5所述的剪刀脚键盘的按键结构，其中，所述键帽呈壳体，所述键帽内表面对应所述第四连接部设有第一安装部，对应所述第二连接部设有第二安装部。
  7. 如权利要求6所述的剪刀脚键盘的按键结构，其中，所述第四连接部滑动连接于所述第一安装部中，所述第二连接部转动连接于所述第二安装部中，所述第一连接部转动连接于所述第二钩部中，并可在所述第二钩部与所述薄膜电路板之间滑动；所述第五连接部转动连接于所述第一钩部中，并抵靠于所述薄膜电路板上。
  8. 如权利要求1所述的剪刀脚键盘的按键结构，其中，所述弹性件包括呈环形的支撑部、及连接于所述支撑部顶部的弹性按压部，所述支撑部对应设于所述薄膜电路板上一个电路触点的外围，所述弹性按压部与所述薄膜电路板的电路触点相对设置且留有间隙；所述弹性件的材料为硅胶、金属、或塑胶。
  9. 如权利要求1所述的剪刀脚键盘的按键结构，其中，所述内支架上设有贯穿所述内支架上下表面的两个第三镂空部。
  10. 如权利要求1所述的剪刀脚键盘的按键结构，其中，所述内支架上设有贯穿所述内支架上下表面的数个通孔。
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