WO2018032965A1 - 通过注塑一体成型的键盘、模具 - Google Patents

通过注塑一体成型的键盘、模具 Download PDF

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Publication number
WO2018032965A1
WO2018032965A1 PCT/CN2017/095353 CN2017095353W WO2018032965A1 WO 2018032965 A1 WO2018032965 A1 WO 2018032965A1 CN 2017095353 W CN2017095353 W CN 2017095353W WO 2018032965 A1 WO2018032965 A1 WO 2018032965A1
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WO
WIPO (PCT)
Prior art keywords
soft rubber
button
injection molding
work
keyboard
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Application number
PCT/CN2017/095353
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English (en)
French (fr)
Inventor
江海波
Original Assignee
江海波
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Publication date
Application filed by 江海波 filed Critical 江海波
Publication of WO2018032965A1 publication Critical patent/WO2018032965A1/zh
Priority to US16/261,948 priority Critical patent/US20190232540A1/en

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Classifications

    • 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
    • H01H13/88—Processes specially adapted for manufacture of rectilinearly movable switches having a plurality of operating members associated with different sets of contacts, e.g. keyboards
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/16—Making multilayered or multicoloured articles
    • B29C45/1615—The materials being injected at different moulding stations
    • B29C45/162—The materials being injected at different moulding stations using means, e.g. mould parts, for transferring an injected part between moulding stations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0046—Details relating to the filling pattern or flow paths or flow characteristics of moulding material in the mould cavity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/2681—Moulds with rotatable mould parts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • 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
    • H01H13/02—Details
    • H01H13/04—Cases; Covers
    • H01H13/06—Dustproof, splashproof, drip-proof, waterproof or flameproof casings
    • 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
    • H01H13/02—Details
    • H01H13/10—Bases; Stationary contacts mounted thereon
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14065—Positioning or centering articles in the mould
    • B29C2045/14131—Positioning or centering articles in the mould using positioning or centering means forming part of the insert
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/46—Knobs or handles, push-buttons, grips
    • B29L2031/466—Keypads, keytops
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2215/00—Tactile feedback
    • H01H2215/004—Collapsible dome or bubble
    • H01H2215/006—Only mechanical function
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2221/00—Actuators
    • H01H2221/05—Force concentrator; Actuating dimple
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2229/00—Manufacturing
    • H01H2229/044—Injection moulding
    • H01H2229/048—Insertion moulding

Definitions

  • the invention relates to the technical field of computer keyboards, in particular to a keyboard and a mold of a "work" body keycap integrally formed by injection molding.
  • the existing keyboard components are many, usually with a key cap, an elastic silicone switch, a scissors foot, a printed circuit film, and
  • the keyboard bottom plate is composed of such a multi-part structure, so that the production cost of the keyboard is high, and each of the key caps and the corresponding elastic silicone switch and the scissors foot need to be installed one by one, which is troublesome to assemble, and the single key caps are one by one.
  • the installed structure is difficult to make the keyboard thin and light. Therefore, the soft and hard plastic thin keyboard without the scissor foot and the separate elastic silicone switch also appears correspondingly.
  • the integrated key cap instead of the single elastic silicone switch and the production process thereof are produced.
  • the required products, how to ensure the stability of the button press and the sensitivity of the press and the ability to restore the deformation are guaranteed, and the parts can be reduced, the cost is reduced, and the thinner and thinner has always been a difficult point for the keyboard developers; in view of this, Design a component with low cost, simple assembly, and compression recovery Good performance, pressing sensitive, convenient keyboard technology as the injection of technical issues to be resolved.
  • the purpose of the novel is to provide a keyboard with low cost, simple assembly, good compression recovery deformation, high pressure pressing, convenient injection molding, and light and thin forming through the rigid sheet slotting injection molding. .
  • the technical solution of the present invention is: a "work” formed by injection molding.
  • a keyboard with a body key cap the keyboard includes an integral "work” body button cap, a printed circuit film under the integral "work” body button cap, and a keyboard bottom plate supported under the printed circuit film;
  • the integrated "work" body button cap is integrally molded by soft rubber and a plurality of hard pieces, wherein each hard piece corresponds to one button unit, and a non-penetration is opened in the center of each hard piece bottom surface.
  • the concave body on the surface of the hard sheet has a concave guiding groove which does not penetrate the surface of the hard sheet from the edge of the bottom surface of the hard sheet, and the concave guiding groove communicates with the concave body, and the soft rubber is in the soft plastic injection molding.
  • a plurality of soft rubber button faces, a plurality of soft rubber button face supports, and a soft rubber support base are respectively formed in the mold cavity, and the upper and lower ends of the button face support body are respectively connected with the soft rubber button face and the button base as an integrated work.
  • the soft rubber is integrally formed, and at the same time, the soft rubber is injected into the concave body through the concave guide groove to form a soft elastic elastic switch body;
  • the pressing force of the soft rubber button surface acts on the hard sheet, and the hard sheet will be transmitted to the soft rubber convex elastic switch body according to the pressure, with the soft plastic support body facing Bending downward and moving vertically downwards, the soft convex elastic switch body moves vertically downward until clicked to contact the corresponding circuit switch point on the printed circuit film to make the circuit closed and energized;
  • the soft rubber elastic switch body and the soft rubber support body simultaneously recover deformation, and the soft rubber convex elastic switch body and the printed circuit film corresponding to the circuit switch point are separated and the circuit is broken.
  • the integrated "work" body button cap restores the initial state.
  • the soft rubber button surface extends outwardly at a peripheral edge of the hard sheet to form a “T” shaped surface, and is integrally molded with the soft plastic support body and the soft rubber base into an integral “work” body button cap.
  • the bottom surfaces of the portions of the soft rubber base are integrally bonded to the corresponding positions of the printed circuit film.
  • a locating ring that protrudes downwardly from the positioning groove of the injection molding die is disposed at an edge of the bottom surface of the hard sheet.
  • the soft rubber convex elastic switch body is a cylindrical body which is integrally injection-molded and is attached to the concave body of the bottom surface of the hard plate, and the cylindrical body is not aligned with the switching point of the printed circuit film.
  • the hard sheet is a hard plastic sheet, or a metal sheet or a glass sheet.
  • the soft rubber is made of a soft rubber material such as acrylate rubber, silicone rubber, or TPR rubber, or PVC rubber.
  • the mold of the "work" body key cap integrally formed by injection molding comprises a male mold and a female mold, and a concave body groove is arranged on the inner side of the bottom of the female mold, and a button unit injection molding convex is arranged on the male mold.
  • a button unit injection molding convex is arranged on the male mold.
  • an injection molding recess is formed, and the edge of the injection unit of the button unit is provided with a positioning groove for mounting the hard sheet positioning ring.
  • the invention relates to a production method of a “work” body keycap integrally formed by injection molding, and the production equipment of the production method comprises an injection machine, a male mold and a master mold, and the production method comprises the following steps:
  • Step 1 In the injection molding, all the hard pieces are correspondingly placed on the corresponding button unit injection bosses on the male mold, and the positioning ring on the bottom surface of the hard piece is inserted in the positioning groove on the button unit injection boss. ;
  • Step 2 After the master mold is combined on the male mold, the soft rubber is injected into the mold cavity, and the soft rubber forms a plurality of soft rubber button faces, a plurality of soft rubber support bodies, and a soft rubber base in the mold, and at the same time, soft
  • the glue is injected into the injection concave hole of the injection unit of the button unit through the concave guide groove of the hard piece, and the soft glue in the injection hole is bonded to the concave body of the hard piece to form a soft elastic elastic switch body;
  • Step 3 After the soft rubber material in the mold is solidified, the male mold and the female mold are opened and the formed integral key cap is ejected through the mold thimble.
  • the traditional keyboard mostly uses a separate elastic silicone switch to bond on the switch point of the printed circuit film, and the soft rubber forming button also usually needs the button grid bracket for fixed clamping, the new type through the bottom surface of each part of the soft rubber base They are all bonded to the corresponding positions of the printed circuit film, so that the fixing effect can be fixed, and the button frame can be omitted, the product parts are reduced, the overall thickness is thinned, the weight is lighter, and the assembly is simpler. , lower cost;
  • the present invention is provided with a positioning ring which is downwardly protruded from the bottom edge of the hard sheet and matched with the positioning groove of the injection male mold.
  • the positioning ring can improve the precise positioning of the hard sheet during injection molding, and
  • the positioning ring is vertically downward with the soft convex elastic switch body, and when the soft rubber convex elastic switch body moves and clicks to contact the corresponding circuit switch point on the printed circuit film.
  • the ring is smoothly pressed against the printed circuit film, so that the key cap can maintain balance when pressed to the bottom, which plays a role of smooth pressing, overcomes the problem that the conventional button is not easily swayed when pressed, and improves the pressing.
  • the soft rubber support has the function of supporting the hard piece to prevent swaying and exerting elasticity, and has the functions of waterproofing, dustproof and lightproofing;
  • the soft rubber convex elastic switch body has the function of pressing and restoring deformation performance and the circuit switch point corresponding to the printed circuit film, and the hard piece makes the whole button force balance and stable; since no structure such as scissors feet is needed, The new components are less costly and easy to assemble.
  • FIG. 1 is a schematic partial cross-sectional structural view of a keyboard of the present invention
  • FIG. 2 is a front perspective view showing the key unit of the embodiment of the present invention.
  • FIG. 3 is a schematic perspective view showing the back side of the button unit of the present invention.
  • FIG. 4 is an exploded perspective view showing the injection molding of a front side of a button unit of the present invention.
  • FIG. 5 is an exploded perspective view showing the injection molding of the back surface of a button unit of the present invention.
  • FIG. 6 is an exploded perspective view showing the injection molding cross section of the back surface of a button unit of the present invention.
  • the keyboard of the novel “work” body keycap is integrally formed by injection molding, and the keyboard includes an integral “work” body button cap 100, and is located in an integrated “work” body button cap. a printed circuit film 200 under 100 and a keyboard backplane 300 supported under the printed circuit film 200;
  • the integral "work" body button cap 100 is integrally molded from a soft rubber 10 and a plurality of rigid sheets 20, wherein each of the rigid sheets 20 corresponds to a button unit 100a at the center of each of the hard sheets 20 There is a concave body 21 which does not penetrate the surface of the hard sheet 20, and a concave guide groove 22 which does not penetrate the surface of the hard sheet 20 is opened from the edge of the bottom surface of the hard sheet 20 and the concave guide groove 22 is The concave body 21 communicates with each other.
  • the soft rubber 10 When the soft rubber 10 is injection molded, the soft rubber 10 forms a plurality of soft rubber button faces 11 , a plurality of soft rubber button face supports 12 , and a soft rubber support base 13 , and a button surface support body in the mold cavity.
  • the upper and lower ends of the 12 are respectively connected with the soft rubber button surface and the button base 13 as an integral "work" shaped soft rubber whole 100.
  • the soft rubber 100 is injected into the concave body 21 through the concave guide groove 22 to form a soft rubber convex elastic.
  • Switch body 14
  • the soft rubber button surface 11 on the button unit 100a When the finger presses the soft rubber button surface 11 on the button unit 100a, the pressing force received by the soft rubber button surface 11 acts on the hard sheet 20, and the hard sheet 20 transmits pressure to the soft rubber elastic switch body 14, As the soft plastic support 14 is bent downward and vertically moved downward, the soft convex elastic switch body 14 is vertically moved downward until the click is brought into contact with the corresponding circuit switch point on the printed circuit film 200 to close the circuit;
  • the soft rubber elastic switch body 14 and the soft rubber support body 12 simultaneously recover deformation, and the soft rubber convex elastic switch body 14 corresponds to the circuit switch 200 of the printed circuit film 200. The point is separated and the circuit is broken, and the integrated "work" body button cap 100 is restored to the initial state.
  • the soft rubber button surface 11 extends outwardly at the peripheral edge of the rigid sheet 20 to form a "T" shaped surface 15, and is integrally molded with the soft plastic support body 12 and the soft rubber base 13 into an integral "work" body button cap 100. .
  • the bottom surfaces 13a of the respective portions of the soft rubber base 13 are bonded integrally with the corresponding positions of the printed circuit film 200.
  • a locating ring 23 is formed on the bottom edge of the hard sheet 20 to match the positioning groove 410 of the injection molding die 400.
  • the soft rubber male elastic switch body 14 is a cylindrical body which is integrally injection-molded and adhered to the concave body 21 on the bottom surface of the hard plate 20, and the cylindrical body is not aligned with the switching point of the printed circuit film 200.
  • the hard sheet 20 is a hard plastic sheet, or a metal sheet or a glass sheet.
  • the soft rubber 10 is made of a soft rubber material such as acrylate rubber, silicone rubber, or TPR rubber, or PVC rubber.
  • the mold of the "work" body key cap integrally formed by injection molding comprises a male mold 400 and a female mold 500, and a concave body groove 510 is arranged on the inner side surface of the bottom of the female mold 500, and is disposed on the male mold 400.
  • the button unit injection boss 410 has a positioning groove 412 for mounting the hard sheet positioning ring 23 at the edge.
  • the invention relates to a production method of a “work” body keycap integrally formed by injection molding, and the production equipment of the production method comprises an injection machine, a male mold 400 and a master mold 500, and the production method comprises the following steps:
  • Step 1 When injecting, all the hard sheets 20 are correspondingly placed on the corresponding button unit injection boss 410 on the male mold 400, and the positioning ring 23 on the bottom surface of the hard sheet 20 is inserted into the button unit injection boss 410.
  • Step 2 After the master mold 500 is assembled on the male mold 400, the soft rubber 10 is injected into the cavity, and the soft rubber 10 respectively forms a plurality of soft rubber button faces 11, a plurality of soft rubber support bodies 12, and soft.
  • the glue base 13 is simultaneously injected into the injection recess 411 of the button unit injection boss 410 through the concave guide groove 22 of the hard sheet 20, and the soft glue 10 in the injection recess 411 is bonded to the hard sheet concave.
  • Step 3 After the soft rubber material 10 in the mold is solidified, the male mold 400 and the female mold 500 are opened and the formed integral keycap 100 is ejected through the mold thimble.
  • the soft rubber button face 11 of the integral "work" body button cap 100 In use, when the finger presses the soft rubber button face 11 of the integral "work" body button cap 100, the soft rubber button face 11 moves vertically downward as the soft rubber support body 12 is bent downward, and when pressed, the soft rubber
  • the male elastic switch body 14 is directly guided by the pressing force of the hard sheet 20, and is pressed down by the soft convex elastic switch body 14 to contact the corresponding circuit switch point on the printed circuit film 200 to turn on the circuit.
  • the positioning ring 23 is vertically downward with the soft convex elastic switch body 14.
  • the bottom of the positioning ring 23 is The ring is smoothly pressed against the printed circuit film 200, so that the key cap can maintain balance when pressed to the bottom, which plays a role of smooth pressing, overcomes the problem that the conventional button is not easily swayed when pressed, and improves the pressing feel and balance;
  • the pressing force transmission of the rigid sheet 20 can make the pressing precision higher, avoiding the hole in the hard sheet 20 to be integrally molded into the soft convex elastic elastic body 14, and the pressing force is conducted through the soft rubber pressing surface 11. The problem that the center protrusion of the soft rubber pressing surface 11 is deformed and the precision is poor;
  • the soft rubber elastic switch body 14 and the soft rubber support body 12 simultaneously recover deformation, and the soft rubber convex elastic switch body and the printed circuit film corresponding to the circuit switch point are separated to open the circuit.
  • the integrated "work" body button cap 100 is restored to the initial state.
  • the soft rubber convex elastic switch body of the hemisphere of the present invention can also be formed into a cylindrical body, and also has the function of pressing and restoring the circuit switch points corresponding to the printed circuit film. This is within the scope of this new type of protection.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Push-Button Switches (AREA)

Abstract

一种通过注塑一体成型的"工"形体键帽的键盘、模具及生产方法，该键盘包括有一体式"工"形体按键帽（100）、印刷电路薄膜（200）以及支撑在印刷电路薄膜（200）下的键盘底板（300）；通过在硬质片（20）开槽来导流来达到在硬质片（20）内侧中心进行一体注塑成型软胶凸形弹性开关体（14），使得软胶凸形弹性开关体（14）直接在硬质片（20）中心成型，这样，在按压时，软胶凸形弹性开关体（14）会直接受到硬质片（20）的按压力传导，使按压精度更高。解决了传统该键盘结构注塑脱模的技术难题，使整个键盘的按键面（11）间隙小且非常平整；利用粘接结构来使产品部件更少而整体厚度变薄，重量更轻便、组装更简单、成本更低；并且通过在硬质片（20）的底面设置定位圈（23），来提高了按压手感和平衡性。

Description

通过注塑一体成型的键盘、模具 技术领域
本新型涉及计算机键盘技术领域，尤其是涉及一种通过注塑一体成型的“工”形体键帽的键盘、模具。
背景技术
随着信息产业的发展，计算机日益广泛使用，不管是笔记本电脑还是台式电脑都离不开计算机键盘，现有的键盘部件较多，通常有键帽、弹性硅胶开关、剪刀脚、印刷电路薄膜和键盘底板组成，这种多部件的结构使得键盘的生产成本较高、并且各个键帽配合对应的弹性硅胶开关、剪刀脚均需要一个一个安装，装配起来较麻烦，而且，这种单个键帽逐个安装的结构难以将键盘制作的比较轻薄，因此，没有剪刀脚和单独弹性硅胶开关的软硬胶轻薄键盘也相应出现，然而对于替代单独弹性硅胶开关的一体式键帽及其生产工艺生产出符合要求的产品，如何使产品按键的按压的稳定性和按压灵敏性以及恢复形变的能力得到保证，又能减少部件、降低成本而更为轻薄一直是键盘研发人员所追求的难点；有鉴于此，设计一种部件少低成本、组装简单、按压恢复形变性能好、按压灵敏、注塑方便的键盘的技术成为有待解决技术问题。
发明内容
本新型的目的就是针对现有技术的不足之处而提供的一种低成本、组装简单、按压恢复形变性能好、按压灵敏、注塑方便、轻薄成型的通过硬质片开槽一体注塑成型的键盘。
为达到上述目的，本新型的技术方案是：一种通过注塑一体成型的“工” 形体键帽的键盘，该键盘包括有一体式“工”形体按键帽、位于一体式“工”形体按键帽下方的印刷电路薄膜以及支撑在印刷电路薄膜下的键盘底板；
所述一体式“工”形体按键帽由软胶和若干个硬质片一体注塑而成，其中，每个硬质片对应一个按键单元，在每个硬质片底面中心开有一个不穿透硬质片表面的凹形体，从硬质片底面任意一侧边缘开有不穿透硬质片表面的凹形导槽且该凹形导槽与凹形体相通，软胶注塑时，软胶在模具腔中分别形成若干个软胶按键面、若干个软胶按键面支撑体，和软胶支撑体底座，按键面支撑体上下端分别与软胶按键面和按键底座相连接为一体式“工”形软胶整体，同时，软胶通过凹形导槽注射到凹形体形成具有软胶凸形弹性开关体；
当手指按压按键单元上的软胶按键面时，软胶按键面受到的按压力作用在硬质片上，硬质片将按压力传递到软胶凸形弹性开关体，随着软胶支撑体向下弯曲并向下垂直移动，软胶凸形弹性开关体垂直向下移动直至点击接触到印刷电路薄膜上相对应的电路开关点上使电路闭合通电；
当手指离开按键单元的软胶按键面时，软胶凸形弹性开关体和软胶支撑体同时恢复形变，软胶凸形弹性开关体与印刷电路薄膜相对应的电路开关点分离而断开电路，一体式“工”形体按键帽恢复初始状态。
所述软胶按键面在硬质片四周边缘向外延伸形成“T”形面，并与软胶支撑体和软胶底座为一体注塑成一体式“工”形体按键帽。
装配后，所述软胶底座的各部分底面均与印刷电路薄膜的相对应位置粘接为一体。
在所述硬质片底面边缘设有向下凸出有与注塑公模的定位凹槽相匹配的定位圈。
所述的软胶凸形弹性开关体是通过一体式注塑成型且贴合在硬质板底面凹形体处的圆柱体，其圆柱体未端正对应印刷电路薄膜的开关点。
所述的硬质片为硬质塑胶片、或金属片、或玻璃片。
所述的软胶采用丙烯酸脂橡胶，硅胶橡胶、或TPR橡胶、或PVC橡胶等软性的橡胶材料。
本新型的一种通过注塑一体成型的“工”形体键帽的模具，包括有公模和母模，在母模底部内侧面设有一圈凹形体槽，在公模上设有按键单元注塑凸台，在该按键单元注塑凸台中心开有注塑凹孔，所述按键单元注塑凸台边缘开有供硬质片定位圈安装的定位凹槽。
本新型的一种通过注塑一体成型的“工”形体键帽的生产方法，该生产方法的生产设备包括有注射机和公模、母模，该生产方法包括以下步骤：
步骤一，注塑时，将所有硬质片对应放入公模上相对应的按键单元注塑凸台上且硬质片底面的定位圈插设定位在按键单元注塑凸台上的定位凹槽内；
步骤二，将母模合在公模上后，向模腔内注射软胶，软胶在模具中分别形成若干个软胶按键面、若干个软胶支撑体，和软胶底座，同时，软胶通过硬质片凹形导槽注射到按键单元注塑凸台的注塑凹孔内，注塑凹孔内的软胶粘合在硬质片凹形体上形成软胶凸形弹性开关体；
步骤三，待模具内软胶物质凝固后，打开公模和母模并通过模具顶针将已成型好的一体式按键帽一并顶出。
采用上述结构和方法后，本新型具有以下优点：
1、通过在硬质片开槽来导流来达到在硬质片内侧中心进行一体注塑成型软胶凸形弹性开关体，使得软胶凸形弹性开关体直接在硬质片中心成型，这样，在按压时，软胶凸形弹性开关体会直接受到硬质片的按压力传导，通过软胶凸形弹性开关体向下按压接触到印刷电路薄膜上相对应的电路开关点上使电路闭合通电，这样，硬质片的按压力传导能使按压精度更高，避免在硬质片上开孔来进行一体注塑成软胶凸形弹性开关体，按压力是通过软胶按压面进行传导造成形变过大而精度差的问题，并且，也解决了传统在硬质片中心开孔来注塑成软胶凸形弹性开关体，按压时，软胶凸形弹性开关体受到按压力向上传递到软胶按键面，造成软胶按键面中心突起不平而影响按压手感的问题；
2、本新型创新性的采用一体成型的“工”形体键帽注塑成型的结构，传 统的硬质材料如果注塑成“工”形体键帽将无法进行脱模，而本新型的软胶注塑成的“工”形体键帽利用软胶形变能顺利脱模，解决了传统注塑技术的疑难技术，并且，“工”形体键帽能使两个按键单元的软胶按键面非常接近，形成很小的间隙，这样能使整个键盘的按键面非常平整，使产品造型更为美观；
3、传统的键盘大都采用独立的弹性硅胶开关粘接在印刷电路薄膜的开关点上，而采用软胶形成按键也通常需要按键格支架进行固定夹紧，本新型通过软胶底座的各部分底面均与印刷电路薄膜的相对应位置粘接为一体，这样能起到固定牢固的效果的同时，又可省略按键格支架，使产品部件更少而整体厚度变薄，重量更轻便、组装更简单、成本更低；
4、本新型在硬质片的底面边缘设有向下凸出有与注塑公模的定位凹槽相匹配的定位圈，这个定位圈一方面能提高使硬质片在注塑时精确定位，另一方面，在产品成型后，使用按压时，该定位圈随着软胶凸形弹性开关体垂直向下，当软胶凸形弹性开关体移动点击接触到印刷电路薄膜上相对应的电路开关点时，定位圈底部一圈平稳抵压在印刷电路薄膜上，从而使键帽在按压到底时能保持平衡，起到按压平稳的作用，克服了传统按键按压时不平易晃动的问题，提高了按压手感和平衡性；
4、软胶支撑体具有支撑硬质片防止晃动和发挥弹性的功能，以及具有防水、防尘、防光外散的功能；
5、软胶凸形弹性开关体兼具有按压恢复形变性能好和印刷电路薄膜相对应的电路开关点的功能，硬质片使整个按键受力均衡平稳；由于不需要剪刀脚等结构，本新型部件少成本低，装配简单方便。
附图说明
图1是本新型实施例的键盘局部剖面结构示意图；
图2是本新型实施例的按键单元的正面立体结构示意图；
图3是本新型实施例的按键单元的背面立体结构示意图；
图4是本新型实施例的一个按键单元正面的注塑立体结构分解示意图；
图5是本新型实施例的一个按键单元背面的注塑立体结构分解示意图；
图6是本新型实施例的一个按键单元背面的注塑剖面结构分解示意图；
具体实施方式
如图1-6所示，本新型的一种通过注塑一体成型的“工”形体键帽的键盘，该键盘包括有一体式“工”形体按键帽100、位于一体式“工”形体按键帽100下方的印刷电路薄膜200以及支撑在印刷电路薄膜200下的键盘底板300；
所述一体式“工”形体按键帽100由软胶10和若干个硬质片20一体注塑而成，其中，每个硬质片20对应一个按键单元100a，在每个硬质片20底面中心开有一个不穿透硬质片20表面的凹形体21，从硬质片20底面任意一侧边缘开有不穿透硬质片20表面的凹形导槽22且该凹形导槽22与凹形体21相通，软胶10注塑时，软胶10在模具腔中分别形成若干个软胶按键面11、若干个软胶按键面支撑体12，和软胶支撑体底座13，按键面支撑体12上下端分别与软胶按键面和按键底座13相连接为一体式“工”形软胶整体100，同时，软胶100通过凹形导槽22注射到凹形体21形成具有软胶凸形弹性开关体14；
当手指按压按键单元100a上的软胶按键面11时，软胶按键面11受到的按压力作用在硬质片20上，硬质片20将按压力传递到软胶凸形弹性开关体14，随着软胶支撑体14向下弯曲并向下垂直移动，软胶凸形弹性开关体14垂直向下移动直至点击接触到印刷电路薄膜200上相对应的电路开关点上使电路闭合通电；
当手指离开按键单元100a的软胶按键面11时，软胶凸形弹性开关体14和软胶支撑体12同时恢复形变，软胶凸形弹性开关体14与印刷电路薄膜200相对应的电路开关点分离而断开电路，一体式“工”形体按键帽100恢复初始状态。
所述软胶按键面11在硬质片20四周边缘向外延伸形成“T”形面15，并与软胶支撑体12和软胶底座13为一体注塑成一体式“工”形体按键帽100。
装配后，所述软胶底座13的各部分底面13a均与印刷电路薄膜200的相对应位置粘接为一体。
在所述硬质片20底面边缘设有向下凸出有与注塑公模400的定位凹槽410相匹配的定位圈23。
所述的软胶凸形弹性开关体14是通过一体式注塑成型且贴合在硬质板20底面凹形体21处的圆柱体，其圆柱体未端正对应印刷电路薄膜200的开关点。
所述的硬质片20为硬质塑胶片、或金属片、或玻璃片。
所述的软胶10采用丙烯酸脂橡胶，硅胶橡胶、或TPR橡胶、或PVC橡胶等软性的橡胶材料。
本新型的一种通过注塑一体成型的“工”形体键帽的模具，包括有公模400和母模500，在母模500底部内侧面设有一圈凹形体槽510，在公模400上设有按键单元注塑凸台410，在该按键单元注塑凸台410中心开有注塑凹孔411，所述按键单元注塑凸台410边缘开有供硬质片定位圈23安装的定位凹槽412。
本新型的一种通过注塑一体成型的“工”形体键帽的生产方法，该生产方法的生产设备包括有注射机和公模400、母模500，该生产方法包括以下步骤：
步骤一，注塑时，将所有硬质片20对应放入公模400上相对应的按键单元注塑凸台410上且硬质片20底面的定位圈23插设定位在按键单元注塑凸台410上的定位凹槽412内；
步骤二，将母模500合在公模400上后，向模腔内注射软胶10，软胶10在模具中分别形成若干个软胶按键面11、若干个软胶支撑体12，和软胶底座13，同时，软胶10通过硬质片20凹形导槽22注射到按键单元注塑凸台410的注塑凹孔411内，注塑凹孔411内的软胶10粘合在硬质片凹形体21上形成软胶凸形弹性开关体14；
步骤三，待模具内软胶10物质凝固后，打开公模400和母模500并通过模具顶针将已成型好的一体式按键帽100一并顶出。
使用时，当手指按一体式“工”形体按键帽100的软胶按键面11时，软胶按键面11随着软胶支撑体12向下弯曲而向下垂直移动，在按压时，软胶凸形弹性开关体14会直接受到硬质片20的按压力传导，通过软胶凸形弹性开关体14向下按压接触到印刷电路薄膜200上相对应的电路开关点上使电路闭合通电，同时，该定位圈23随着软胶凸形弹性开关体14垂直向下，当软胶凸形弹性开关体14移动点击接触到印刷电路薄膜200上相对应的电路开关点时，定位圈23底部一圈平稳抵压在印刷电路薄膜200上，从而使键帽在按压到底时能保持平衡，起到按压平稳的作用，克服了传统按键按压时不平易晃动的问题，提高了按压手感和平衡性；而硬质片20的按压力传导能使按压精度更高，避免在硬质片20上开孔来进行一体注塑成软胶凸形弹性开关体14，按压力是通过软胶按压面11进行传导造成软胶按压面11中心突起形变且精度差的问题；
当手指离开软胶按键面11时，软胶凸形弹性开关体14和软胶支撑体12同时恢复形变，软胶凸形弹性开关体与印刷电路薄膜相对应的电路开关点分离而断开电路，一体式“工”形体按键帽100恢复初始状态。
以上是本新型公开的实施例，本新型中的半球体的软胶凸形弹性开关体也可以成型为圆柱等形体，也同时具备按压恢复形变和印刷电路薄膜相对应的电路开关点的功能，这都在本新型的保护范围之内。

Claims (9)

  1. 一种通过注塑一体成型的“工”形体键帽的键盘，该键盘包括有一体式“工”形体按键帽、位于一体式“工”形体按键帽下方的印刷电路薄膜以及支撑在印刷电路薄膜下的键盘底板；
    其特征在于：所述一体式“工”形体按键帽由软胶和若干个硬质片一体注塑而成，其中，每个硬质片对应一个按键单元，在每个硬质片底面中心开有一个不穿透硬质片表面的凹形体，从硬质片底面任意一侧边缘开有不穿透硬质片表面的凹形导槽且该凹形导槽与凹形体相通，软胶注塑时，软胶在模具腔中分别形成若干个软胶按键面、若干个软胶按键面支撑体，和软胶支撑体底座，按键面支撑体上下端分别与软胶按键面和按键底座相连接为一体式“工”形软胶整体，同时，软胶通过凹形导槽注射到凹形体形成具有软胶凸形弹性开关体；
    当手指按压按键单元上的软胶按键面时，软胶按键面受到的按压力作用在硬质片上，硬质片将按压力传递到软胶凸形弹性开关体，随着软胶支撑体向下弯曲并向下垂直移动，软胶凸形弹性开关体垂直向下移动直至点击接触到印刷电路薄膜上相对应的电路开关点上使电路闭合通电；
    当手指离开按键单元的软胶按键面时，软胶凸形弹性开关体和软胶支撑体同时恢复形变，软胶凸形弹性开关体与印刷电路薄膜相对应的电路开关点分离而断开电路，一体式“工”形体按键帽恢复初始状态。
  2. 根据权利要求1所述的一种通过注塑一体成型的“工”形体键帽的键盘，其特征在于：所述软胶按键面在硬质片四周边缘向外延伸形成“T”形面，并与软胶支撑体和软胶底座为一体注塑成一体式“工”形体按键帽。
  3. 根据权利要求1或2所述的一种通过注塑一体成型的“工”形体键帽的键盘，其特征在于：装配后，所述软胶底座的各部分底面均与印刷电路薄膜的相对应位置粘接为一体。
  4. 根据权利要求3所述的一种通过注塑一体成型的“工”形体键帽的键盘，其特征在于：在所述硬质片底面边缘设有向下凸出有与注塑公模的定位凹 槽相匹配的定位圈。
  5. 根据权利要求4所述的一种通过注塑一体成型的“工”形体键帽的键盘，其特征在于：所述的软胶凸形弹性开关体是通过一体式注塑成型且贴合在硬质板底面凹形体处的圆柱体，其圆柱体未端正对应印刷电路薄膜的开关点。
  6. 根据权利要求4所述的一种通过注塑一体成型的“工”形体键帽的键盘，其特征在于：所述的硬质片为硬质塑胶片、或金属片、或玻璃片。
  7. 根据权利要求4所述的一种通过注塑一体成型的“工”形体键帽的键盘，其特征在于：所述的软胶采用丙烯酸脂橡胶，硅胶橡胶、或TPR橡胶、或PVC橡胶等软性的橡胶材料。
  8. 一种通过注塑一体成型的“工”形体键帽的模具，其特征在于：包括有公模和母模，在母模底部内侧面设有一圈凹形体槽，在公模上设有按键单元注塑凸台，在该按键单元注塑凸台中心开有注塑凹孔。
  9. 根据权利要求8所述的一种通过注塑一体成型的“工”形体键帽的模具，其特征在于：所述按键单元注塑凸台边缘开有供硬质片定位圈安装的定位凹槽。
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CN106128830B (zh) * 2016-08-15 2018-11-06 江海波 一种通过注塑一体成型的“工”形体键帽的键盘
CN207542117U (zh) * 2017-09-27 2018-06-26 惠州良信智能科技有限公司 一种具有自弹式开关的移动开关
CN114619221B (zh) * 2022-03-30 2023-04-14 重庆犇沃机电有限公司 一种剪刀脚组装方法及混合式剪刀脚组装机
CN114860035A (zh) * 2022-05-24 2022-08-05 苏州斯普兰蒂科技股份有限公司 一种超薄笔记本键盘结构
CN117863465A (zh) * 2024-03-13 2024-04-12 连云港原秀科技有限公司 一种双色键帽生产注塑模具

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