WO2017143869A1 - 一种按键结构 - Google Patents

一种按键结构 Download PDF

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Publication number
WO2017143869A1
WO2017143869A1 PCT/CN2016/113732 CN2016113732W WO2017143869A1 WO 2017143869 A1 WO2017143869 A1 WO 2017143869A1 CN 2016113732 W CN2016113732 W CN 2016113732W WO 2017143869 A1 WO2017143869 A1 WO 2017143869A1
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WO
WIPO (PCT)
Prior art keywords
button
upper cover
ring structure
pcb board
protrusion
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Application number
PCT/CN2016/113732
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English (en)
French (fr)
Inventor
张宗韬
侯旻翔
涂建平
杨冬青
Original Assignee
广州视睿电子科技有限公司
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Application filed by 广州视睿电子科技有限公司 filed Critical 广州视睿电子科技有限公司
Publication of WO2017143869A1 publication Critical patent/WO2017143869A1/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
    • H01H13/02—Details
    • H01H13/12—Movable parts; Contacts mounted thereon
    • H01H13/14—Operating parts, e.g. push-button

Definitions

  • the utility model relates to the technical field of power supply devices, in particular to a button structure.
  • the button body 1 is mounted on the mechanism main body 3 through the button elastic arm 2, and the button body 1 and the elastic arm 2 are an integral structure made of a hard plastic material, in order to meet the pressing requirement.
  • a spring arm 2 is disposed on each side of the button body 1.
  • the button switch is set on the PCB board, the PCB board is placed on the mechanism body, the fulcrum of the PCB board is around, and the bottom of the PCB board has no support, when the area of the PCB board is large to a certain size When the button switch is pressed, the PCB board is easily deformed and the risk of sag occurs.
  • the utility model solves the problem that the original button structure has a card key or a button failure when the button body is pressed.
  • the present invention provides a button structure, including an upper cover, a button body, an elastic arm, a mechanism body, and a PCB board provided with a button switch, wherein the PCB board is disposed above the mechanism body.
  • the elastic arm is disposed above the PCB board and encloses the button switch therein, the upper cover is closed on the button body, and the upper cover is provided to expose the button body First through hole;
  • the elastic arm includes an inner ring structure, an outer ring structure, and an annular buffer portion disposed between the inner ring structure and the outer ring structure, wherein the inner ring structure is engaged with the button body through at least three snap positions
  • the outer ring structure is engaged with the upper cover by at least three snap-in positions.
  • the technical problem to be further solved by the utility model is that the original button structure is likely to be deformed when the button switch is pressed, and the risk of sag occurs.
  • an edge of the PCB board is supported above the mechanism body, and an upper surface of the mechanism body is located below the PCB board. Raised.
  • the button body is made of a hard plastic
  • the elastic arm is made of soft plastic or silicone.
  • the annular buffer portion has a cross section with a thin intermediate thickness at both ends.
  • the inner ring structure includes at least three circumferentially disposed inner mounting seats, and each of the inner mounting seats is respectively engaged with the button body through a snapping position;
  • the outer ring structure includes at least three circumferentially disposed outer mounts, each of the outer mounts being engaged with the upper cover by a snap-fit position.
  • the inner mounting seat is provided with a first positioning hole
  • the button body is provided with a second protrusion corresponding to the first positioning hole, the second protrusion and the first positioning hole Card access;
  • a second positioning hole is disposed on the outer mounting seat, and the upper cover is provided with a third protrusion corresponding to the second positioning hole, and the third protrusion is engaged with the second positioning hole.
  • the inner mount and the outer mount are each arranged in four evenly arranged.
  • the first protrusion is located directly below the push button switch.
  • the lower surface of the upper cover is provided with a plurality of connecting columns, and the PCB board and the mechanism body are respectively provided with through holes corresponding to the connecting columns, and a connecting member sequentially passes through the mechanism body.
  • the via hole and the via hole of the PCB board are connected to the connection post of the upper cover.
  • the upper surface of the upper cover is provided with a fourth protrusion at a position opposite to the connecting post.
  • the button structure further includes a lower cover that covers the upper cover, and the lower cover is provided with a second through hole for exposing the mechanism body.
  • the utility model provides a button structure
  • the elastic arm comprises an annular buffering portion
  • the inner side of the annular buffering portion is engaged with the button body through at least three clamping positions
  • the outer side of the annular buffering portion is located by at least three snaps.
  • the cover card is connected, and the ring buffering portion provides a buffering effect when the button is pressed, thereby improving the stability of the button body when pressed, and there is no obvious leverage effect on the button body having a small diameter or a large diameter, so that the button body is not easy to be used.
  • the problem of the keystroke or the button failure is caused by the rollover, and the use of the button is improved.
  • the button structure of the embodiment is particularly suitable for use with a button body having a large diameter.
  • a first protrusion is disposed on the mechanism body under the PCB board, and the first protrusion serves as a support for the PCB board, which can improve reliability when the button is used, and the PCB board is not easily deformed, thereby effectively preventing The PCB board is sunken.
  • FIG. 1 is a schematic structural view of a conventional button in the background art
  • FIG. 2 is an exploded view of a button structure of an embodiment of the present invention
  • FIG. 3 is a schematic structural view of an elastic arm in an embodiment of the present invention.
  • FIG. 4 is a schematic structural view of a button body in the embodiment of the present invention.
  • Figure 5 is a schematic structural view of an upper cover in the embodiment of the present invention.
  • FIG. 6 is a schematic exploded view showing the cooperation of a push button switch, a PCB board and a mechanism body in the embodiment of the present invention
  • FIG. 7 is a schematic view showing a combined structure of a key switch, a PCB board and a mechanism body in the embodiment of the present invention.
  • Figure 8 is a schematic view showing the structure of a mechanism body according to another embodiment of the present invention.
  • Button body 11, second protrusion; 12, annular protrusion; 20, elastic arm; 21, annular buffer portion; 22, inner mounting seat; 23, outer mounting seat; 24, first positioning hole; Second positioning hole; 30, upper cover; 31, third protrusion; 32, first through hole; 33, connecting column; 34, fourth protrusion; 40, push button switch; 50, PCB board; 51, PCB board Through hole; 60, mechanism body; 61, recess; 62, through hole of the mechanism body; 70, lower cover; 71, second through hole; 80, first protrusion.
  • an embodiment of the button structure of the present invention includes an upper cover 30, a button body 10, an elastic arm 20, a mechanism body 60, and a PCB board provided with a button switch 40.
  • the PCB board is disposed on the mechanism body.
  • the elastic arm 20 is disposed above the PCB board and the button switch 40 is wrapped therein.
  • the inner ring structure is disposed on the inner side of the annular buffer portion 21, and the outer ring structure is formed in the annular buffer portion 21
  • the outer ring structure is engaged with the button body 10 through at least three snap-in positions; the outer ring structure is engaged with the upper cover 30 through at least three snap-in positions; when the button body 10 is pressed, it passes
  • the elastic arm 20 evenly distributes the pressure, and the utility model can
  • the stability of the button body 10 when pressed is improved, and there is no obvious leverage effect on the button body 10 having a small diameter or a large diameter, thereby making the button body 10 difficult to roll over and causing a problem of a key or a button failure, thereby improving the problem.
  • the button structure of the embodiment is particularly suitable for use with the button body 10 having a large diameter.
  • the button structure further includes a lower cover 70 that is overlapped with the upper cover 30.
  • the PCB board 50 is disposed on the upper surface of the mechanism body 60, and the lower cover 70 is provided with a second through hole 71 for exposing the mechanism body 60. So that: the inside of the mechanism body 60 and The heat generating device on the PCB board 50 is in contact, and the outside of the mechanism body 60 is exposed to the outside, which has the effect of dissipating heat and improving the overall appearance of the button structure.
  • the button body 10 is made of a hard non-metallic material, and the elastic arm 20 is made of a soft elastic non-metal material.
  • the button body 10 is made of hard plastic, and the elastic arm 20 is made of soft plastic or silicone. The dispersion of the pressure when the button body 10 is pressed can be improved, and the use feeling of the button can be further improved.
  • the inner ring structure includes at least three circumferentially disposed inner mounting seats 22, the inner mounting seats 22 are fixedly coupled to the inner side of the annular buffer portion 21, and each inner mounting seat 22 is respectively connected by a snap.
  • the bit is engaged with the button body 10.
  • the inner mounts 22 are arranged in a uniform arrangement of four. It should be noted that four or more, such as five, six, etc., may be provided. In order to ensure the elastic action of the elastic arms 20, four are preferred.
  • the inner mounting seat 22 is provided with a first positioning hole 24, and the button body 10 is provided with a second protrusion 11 corresponding to the first positioning hole 24, the second protrusion 11 and the first positioning hole 24 is connected, a second protrusion 11 and a first positioning hole 24 are engaged to form a card position, thereby achieving the engagement of the button body 10 and the elastic arm 20.
  • the second protrusion may be disposed on the inner mounting seat 22, and the corresponding first positioning hole is disposed on the button body 10, thereby being similarly achieved by the second protrusion and the first positioning hole being engaged.
  • the button body 10 is engaged with the elastic arm 20.
  • the outer ring structure includes at least three circumferentially disposed outer mounts 23, the outer mounts 23 are fixed to the outer side of the annular buffer portion 21, and each of the outer mounts 23 respectively passes through a snap-fit position. Engage with the upper cover 30.
  • the outer mounts 23 are arranged in four uniformly arranged. It should be noted that four or more, such as five, six, etc., may be provided. In order to ensure the elastic action of the elastic arms 20, four are preferable.
  • the outer mounting seat 23 is provided with a second positioning hole 25, and the upper cover 30 is provided with a third protrusion 31 corresponding to the second positioning hole 25, and the third protrusion 31 and the second positioning hole 25 is engaged, and a third protrusion 31 is engaged with a second positioning hole 25 to form a card position, thereby achieving the engagement of the button body 10 and the elastic arm 20.
  • the outer mounting seat 23 is provided with a third protrusion 31, and the upper cover 30 is provided with a corresponding second positioning hole 25, so that the third protrusion 31 and the second positioning hole 25 can also be engaged. The manner in which the upper cover 30 is engaged with the elastic arm 20 is achieved.
  • the inner mount 22 can be disposed at any position inside the annular buffer portion 21. Accordingly, the outer mount 23 can also be disposed at any position outside the annular buffer portion 21, so that the pressure of the button body 10 can pass through the inner mount.
  • the outer mount 22 and the outer mount 23 are more directly dispersed.
  • the inner mount 22 and the outer mount 23 of the present embodiment are disposed opposite to the inner and outer sides of the annular buffer portion 21.
  • the annular groove 26 is provided on the upper surface of the annular buffer portion 21 of the elastic arm 20, whereby the elastic force of the elastic arm 20 can be increased, and the hand feeling during use can be increased.
  • the lower surface of the button body 10 is provided with an annular protrusion corresponding to the annular groove 26 12, the annular protrusion 12 is engaged with the annular groove 26 to improve the stability of the connection structure of the button body 10 and the elastic arm 20, and to avoid excessive elastic deformation of the elastic arm 20.
  • the inner ring structure and the outer ring structure of the elastic arm 20 may also be an integral ring structure, and at least an inner ring structure and an outer ring structure are respectively provided for the integrated ring structure.
  • the three card contacts are respectively engaged with the button body 10 and the upper cover 30.
  • the edge of the PCB board 50 is supported above the mechanism body 60.
  • the upper surface of the mechanism body 60 is provided with a recess 61 at a position opposite to the PCB board 50, and the edge of the PCB board 50 is supported at
  • the upper surface of the recess 61 is preferably the inner surface of the recess 61 and is located below the PCB 50 with a first protrusion 80.
  • the first protrusion 80 supports the PCB 50. The reliability of the button can be improved, and the PCB board 50 is less likely to be deformed, thereby effectively preventing the PCB board 50 from sinking.
  • the edge of the PCB board 50 is detachably connected to the side wall of the mechanism body 60.
  • the edge of the PCB board 50 is engaged with the side wall of the mechanism body 60, and specifically, the card member can be engaged.
  • the first protrusions 80 may be located at any position below the PCB board 50, and the first protrusions 80 may be disposed in one or more.
  • FIGS. 6 and 7 show a structure in which a first protrusion 80 is disposed, and FIG. The structure of the two first protrusions 80 is set.
  • the position of the first protrusions 80 may be directly under the button switch 40, or may be located at other positions below the PCB board 50. Since the button switch 40 is a pressing point, the pressure is The force point, therefore, preferably, as shown in FIGS.
  • the first protrusion 80 is located directly below the button switch 40, whereby when the button switch 40 is pressed down, the first protrusion 80 can be directly
  • the pressure applied to the PCB board 50 exerts an opposite resistance, reinforcing the support of the PCB board 50.
  • the button switch 40 is located at an intermediate position of the PCB board 50. Accordingly, the first protrusions 80 may be disposed at an intermediate position below the PCB board 50.
  • the top of the first protrusion 80 and the bottom of the PCB board 50 should be substantially flat.
  • the top of the first protrusion 80 has a certain gap L between the top of the PCB board 50 and the bottom of the PCB board 50.
  • the gap L can prevent the first protrusion 80 from jacking up the PCB board 50, causing the edge of the PCB board 50 to be lifted to affect the use of the button.
  • the gap L may be from 0.1 to 0.4 mm, preferably 0.2 mm.
  • the first protrusion 80 can be of any shape, such as a cylinder, a cone, a polyhedron or other regular or irregular shape. Further, in order to facilitate demolding, the top of the first projection 80 is provided with a draft angle.
  • the first protrusion 80 may be a structure integrally formed with the mechanism body 60.
  • the first protrusion 80 may also be a structure detachably connected to the mechanism body 60, which is processed according to different requirements.
  • the lower surface of the upper cover 30 is provided with a plurality of connecting posts 33.
  • the PCB board 50 and the mechanism body 60 are respectively provided with through holes corresponding to the connecting posts 33, and sequentially pass through the through holes 62 of the mechanism body and the PCB board through the connecting members.
  • Through hole 51 and upper cover 30 The posts 33 are connected, thereby connecting the upper cover 30, the PCB board 50 and the mechanism body 60 together, and confining the button body, the elastic arm 20 and the push switch 40 between the upper cover 30 and the PCB board 50.
  • the upper surface of the upper cover 30 is provided with a fourth projection 34 at a position opposed to the connecting post 33.
  • the elastic arm 20 of the present invention includes an annular buffer portion 21, the inner side of the annular buffer portion 21 is engaged with the button body 10 through at least three snap positions, and the outer side of the annular buffer portion 21 passes through at least three snap positions.
  • the annular buffer portion 21 provides a cushioning effect when the button is pressed, thereby improving the stability of the button body 10 when pressed, and there is no obvious lever for the button body 10 having a small diameter or a large diameter.
  • the effect of the button body 10 is not easy to roll over and the card key or the button is invalid, and the use of the button is improved.
  • the button structure of the embodiment is particularly suitable for the button body 10 having a larger diameter;
  • the first protrusion 80 is disposed under the board 50 as a support structure, which can improve the reliability of the use of the button and prevent the PCB board 50 from being deformed.

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  • Push-Button Switches (AREA)

Abstract

一种按键结构，其包括上盖(30)、按键本体(10)、弹力臂(20)、机构本体(60)和设有按键开关(40)的PCB板(50)，弹力臂包括内环结构、外环结构以及设于内环结构和外环结构之间的环形缓冲部(21)，内环结构通过至少三个卡接位与按键本体进行卡接；外环结构通过至少三个卡接位与上盖进行卡接，环形缓冲部在按键按压时提供缓冲的效果，由此可提高按键本体按压时的稳定性，没有明显的杠杆效应，使得按键本体不易侧翻进而发生卡键或按键失效的问题，提高了按键的使用手感。进一步地，在机构本体上位于PCB板的下方设有第一凸起(80)，该第一凸起对PCB板起到支撑的作用，可提高按键使用时的可靠性，PCB板不易发生变形，有效防止PCB板下陷。

Description

一种按键结构 技术领域
本实用新型涉及供电设备技术领域，特别是涉及一种按键结构。
背景技术
原有的按键结构设计中，如图1所示，按键本体1通过按键弹力臂2安装在机构主体3上，按键本体1和弹力臂2为硬塑胶材料制成的一体结构，为了满足按压要求，按键本体1的两侧分别设置一个弹力臂2，按键本体1与弹力臂2之间只有两个连接点，按压按键本体1时会发生杠杆效应，按键本体1的直径越大，杠杆效应越明显，如果按键本体1的直径过大，在按压按键本体1时，按键本体1容易侧翻由此会出现卡键或者按键失效的风险。
此外，在原有按键的结构设计中，按键开关设于PCB板上，PCB板置于机构本体上，PCB板的支点在四周，PCB板的中心底部没有支撑，当PCB板的面积大到一定尺寸时，按压按键开关时，PCB板容易发生变形进而出现下陷的风险。
实用新型内容
本实用新型首先要解决的是原有的按键结构在按压按键本体出现卡键或按键失效的问题。
为了解决上述问题，本实用新型提供一种按键结构，包括上盖、按键本体、弹力臂、机构本体和设有按键开关的PCB板，其所述PCB板设于所述机构本体的上方，所述弹力臂设于所述PCB板的上方并将所述按键开关包覆在其内部，所述上盖盖合于所述按键本体上，且所述上盖上设有使所述按键本体露出的第一通孔；
所述弹力臂包括内环结构、外环结构以及设于所述内环结构和外环结构之间的环形缓冲部，所述内环结构通过至少三个卡接位与所述按键本体进行卡接；所述外环结构通过至少三个卡接位与所述上盖进行卡接。
本实用新型进一步要解决的技术问题是原有按键结构在按压按键开关时PCB板容易发生变形进而出现下陷的风险。
为了解决上述技术问题，进一步地，本实用新型的按键结构中，所述PCB板的边缘支撑在所述机构本体的上方，所述机构本体的上表面位于所述PCB板的下方设有第一凸起。
作为优选方案，所述按键本体由硬塑料制成，所述弹力臂由软塑料或硅胶制成。
作为优选方案，所述环形缓冲部的截面为中间薄两端厚的结构。
所述内环结构包括至少三个周向布置的内安装座，每个所述内安装座分别通过一个卡接位与所述按键本体进行卡接；
所述外环结构包括至少三个周向布置的外安装座，每个所述外安装座分别通过一个卡接位与所述上盖进行卡接。
作为优选方案，所述内安装座上设有第一定位孔，所述按键本体上设有与所述第一定位孔相对应的第二凸起，所述第二凸起和第一定位孔卡接；
所述外安装座上设有第二定位孔，所述上盖上设有与所述第二定位孔相对应的第三凸起，所述第三凸起与第二定位孔卡接。
作为优选方案，所述内安装座和外安装座均设置为均匀布置的四个。
作为优选方案，所述第一凸起位于所述按键开关的正下方。
作为优选方案，所述上盖的下表面设有多个连接柱，所述PCB板和机构本体上分别设有与所述连接柱相对应的过孔，一连接件依次穿过所述机构本体的过孔和所述PCB板的过孔与所述上盖的连接柱连接。
作为优选方案，所述上盖的上表面与所述连接柱相对的位置设有第四凸起。
作为优选方案，所述按键结构还包括与所述上盖相互盖合的下盖，所述下盖上设有使所述机构本体露出的第二通孔。
本实用新型所提供的一种按键结构，弹力臂包括环形缓冲部，该环形缓冲部的内侧通过至少三个卡接位与按键本体卡接，环形缓冲部的外侧通过至少三个卡接位于上盖卡接，环形缓冲部在按键按压时提供缓冲的效果，由此可提高按键本体按压时的稳定性，对于直径较小或较大的按键本体，都没有明显的杠杆效应，使得按键本体不易侧翻进而发生卡键或按键失效的问题，提高了按键的使用手感，本实施例的按键结构特别适用于直径较大的按键本体使用。
进一步地，在机构本体上位于PCB板的下方设有第一凸起，该第一凸起对PCB板起到支撑的作用，可提高按键使用时的可靠性，PCB板不易发生变形，有效防止PCB板下陷。
附图说明
图1是背景技术中原有按键的结构示意图；
图2是本实用新型实施例的按键结构的分解图；
图3是本实用新型实施例中的弹力臂的结构示意图；
图4是本实用新型实施例中的按键本体的结构示意图；
图5是本实用新型实施例中的上盖的结构示意图；
图6是本实用新型实施例中按键开关、PCB板与机构本体配合的分解结构示意图；
图7是本实用新型实施例中按键开关、PCB板与机构本体配合的组合结构示意图；
图8本实用新型的另一个实施例机构本体的结构示意图。
其中，1、按键本体；2、弹力臂；3、机构主体；
10、按键本体；11、第二凸起；12、环形凸起；20、弹力臂；21、环形缓冲部；22、内安装座；23、外安装座；24、第一定位孔；25、第二定位孔；30、上盖；31、第三凸起；32、第一通孔；33、连接柱；34、第四凸起；40、按键开关；50、PCB板；51、PCB板的过孔；60、机构本体；61、凹陷；62、机构本体的过孔；70、下盖；71、第二通孔；80、第一凸起。
具体实施方式
下面结合附图和实施例，对本实用新型的具体实施方式作进一步详细描述。以下实施例用于说明本实用新型，但不用来限制本实用新型的范围。
如图2所示，本实用新型按键结构的一种实施例，其包括上盖30、按键本体10、弹力臂20、机构本体60和设有按键开关40的PCB板，PCB板设于机构本体60的上方，弹力臂20设于PCB板的上方并将按键开关40包覆在其内部，按键本体10设于弹力臂20的上方，上盖30盖合于按键本体10的上方，且上盖30上设有使按键本体10露出的第一通孔32，该第一通孔32与按键本体10位置相对，且二者尺寸相匹配；本实用新型的弹力臂20和按键本体10为分体式，弹力臂20包括内环结构、外环结构以及设于内环结构和外环结构之间的环形缓冲部21，内环结构设于环形缓冲部21的内侧，外环结构环形缓冲部21的外侧，其中，内环结构通过至少三个卡接位与按键本体10进行卡接；外环结构通过至少三个卡接位与上盖30进行卡接；当按键本体10被按压时，会通过弹力臂20把压力均匀分散，本实用新型可提高按键本体10按压时的稳定性，对于直径较小或较大的按键本体10，都没有明显的杠杆效应，由此使得按键本体10不易侧翻进而发生卡键或按键失效的问题，提高了按键的使用手感，本实施例的按键结构特别适用于直径较大的按键本体10使用。
此外，按键结构还包括与上盖30相互盖合的下盖70，PCB板50设于机构本体60的上表面，下盖70上设有使机构本体60露出的第二通孔71，由此使得：机构本体60的内侧与 PCB板50上的发热器件接触，而机构本体60的外侧裸露在外面，既有散热的效果，又可以提高按键结构的整体外观性。
按键本体10由硬质非金属材料制成，弹力臂20由软质弹性非金属材料制成，优选地，按键本体10由硬塑料制成，弹力臂20由软塑料或硅胶制成，由此可提高按键本体10按压时压力的分散作用，进而可进一步提高按键的使用手感。
结合图3和图4所示，内环结构包括至少三个周向布置的内安装座22，内安装座22固定连接在环形缓冲部21的内侧，每个内安装座22分别通过一个卡接位与按键本体10进行卡接。优选地，内安装座22设为均匀布置的四个，需要说明的是，还可以设置为四个以上，如五个、六个等，为了确保弹力臂20的弹性作用，优选为四个。在本实施例中，内安装座22上设有第一定位孔24，按键本体10上设有与第一定位孔24相对应的第二凸起11，第二凸起11和第一定位孔24卡接，一个第二凸起11和一个第一定位孔24相配合卡接形成一个卡接位，由此实现按键本体10和弹力臂20的卡接。此外还可以是，内安装座22上设置第二凸起，而在按键本体10上设置相对应的第一定位孔，由此同样可以通过第二凸起和第一定位孔卡接的方式实现按键本体10与弹力臂20的卡接。
结合图3和图5所示，外环结构包括至少三个周向布置的外安装座23，外安装座23固定在环形缓冲部21的外侧，每个外安装座23分别通过一个卡接位与上盖30进行卡接。优选地，外安装座23设为均匀布置的四个，需要说明的是，还可以设置为四个以上，如五个、六个等，为了确保弹力臂20的弹性作用，优选为四个。在本实施例中，外安装座23上设有第二定位孔25，上盖30上设有与第二定位孔25相对应的第三凸起31，第三凸起31与第二定位孔25卡接，一个第三凸起31与一个第二定位孔25卡接形成一个卡接位，由此实现了按键本体10和弹力臂20的卡接。此外还可以是，外安装座23上设有第三凸起31，上盖30上设置相对应的第二定位孔25，由此同样可以通过第三凸起31和第二定位孔25卡接的方式实现上盖30与弹力臂20的卡接。
其中，内安装座22可以设置在环形缓冲部21内侧的任意位置，相应地，外安装座23也可以设置在环形缓冲部21外侧的任意位置，为了使得按键本体10的压力能够通过内安装座22和外安装座23更直接地分散，优选地，本实施例的内安装座22和外安装座23相对设置在环形缓冲部21的内外两侧。
优选地，在弹力臂20的环形缓冲部21的上表面设有环形凹槽26，由此可提高弹力臂20的弹力，增加使用时的手感。按键本体10的下表面设有与该环形凹槽26相对应的环形凸起 12，该环形凸起12与环形凹槽26卡接，以提高按键本体10与弹力臂20的连接结构的稳定性，避免弹力臂20发生过大的弹性形变。
此外，作为按键结构的另一个实施例，弹力臂20的内环结构、外环结构还可以为一体式环形结构，并在为一体式环形结构的内环结构上、外环结构上分别设置至少三个卡接位，用以分别与按键本体10、上盖30卡接。
进一步地，如图6所示，PCB板50的边缘支撑在机构本体60的上方，优选地：机构本体60的上表面与PCB板50相对的位置设有凹陷61，PCB板50的边缘支撑在该凹陷61侧壁的上方；机构本体60的上表面优选为凹陷61的内部且位于PCB板50的下方设有第一凸起80，该第一凸起80对PCB板50起到支撑的作用，可提高按键使用时的可靠性，PCB板50不易发生变形，有效防止PCB板50下陷。
PCB板50的边缘与机构本体60的侧壁可拆卸连接，优选地，PCB板50的边缘与机构本体60的侧壁卡接，具体是可以通过卡接件进行卡接。
第一凸起80可位于PCB板50下方的任意位置，该第一凸起80可设置为一个或多个，图6和图7所示为设置一个第一凸起80的结构，图8为设置两个第一凸起80的结构，第一凸起80的位置可以是位于按键开关40的正下方，也可以是位于PCB板50下方的其它位置，由于按键开关40是按压点，压力的受力点，因此，优选地，如图6和图7所示，第一凸起80位于按键开关40的正下方，由此在向下按压按键开关40时，第一凸起80可直接对PCB板50所受到的压力产生相反的抵抗力，加强了对PCB板50的支撑作用。其中，为了方便按键的使用和安装，按键开关40位于PCB板50的中间位置，相应地，可将第一凸起80设于PCB板50下方的中间位置。
第一凸起80的顶部与PCB板50的底部应做到基本持平，为了方便加工，如图8所示，第一凸起80的顶部与PCB板50的底部之间具有一定的间隙L，该间隙L可避免第一凸起80将PCB板50顶起导致PCB板50的边缘翘起而影响按键的使用。该间隙L可为0.1-0.4mm，优选为0.2mm。第一凸起80可以为任意的形状，如可以是圆柱体、圆锥体、多面体或其它规则或不规则的形状。此外，为了方便脱模，第一凸起80的顶部设有拔模斜度。第一凸起80可以是与机构本体60一体成型的结构，第一凸起80也可以是与机构本体60可拆卸连接的结构，其根据不同的需求进行加工。
上盖30的下表面设有多个连接柱33，PCB板50和机构本体60上分别设有与连接柱33相对应的过孔，通过连接件依次穿过机构本体的过孔62和PCB板的过孔51与上盖30的连 接柱33连接，由此将上盖30、PCB板50和机构本体60连接在一起，并将按键本体、弹力臂20和按键开关40限制在上盖30和PCB板50之间。为了解决上盖30的连接柱33在注塑工艺导致的缩水、应力痕等不良问题，以提高产品的生产率，上盖30的上表面与连接柱33相对的位置设有第四凸起34。
综上，本实用新型的弹力臂20包括环形缓冲部21，该环形缓冲部21的内侧通过至少三个卡接位与按键本体10卡接，环形缓冲部21的外侧通过至少三个卡接位与上盖30卡接，环形缓冲部21在按键按压时提供缓冲的效果，由此可提高按键本体10按压时的稳定性，对于直径较小或较大的按键本体10，都没有明显的杠杆效应，由此使得按键本体10不易侧翻进而发生卡键或按键失效的问题，提高了按键的使用手感，本实施例的按键结构特别适用于直径较大的按键本体10使用；此外，在PCB板50的下方设置第一凸起80作为支撑结构，可提高按键使用的可靠性，防止PCB板50下陷变形。
以上所述仅是本实用新型的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本实用新型技术原理的前提下，还可以做出若干改进和替换，这些改进和替换也应视为本实用新型的保护范围。

Claims (11)

  1. 一种按键结构，包括上盖、按键本体、弹力臂、机构本体和设有按键开关的PCB板，其特征在于，所述PCB板设于所述机构本体的上方，所述弹力臂设于所述PCB板的上方并将所述按键开关包覆在其内部，所述上盖盖合于所述按键本体上，且所述上盖上设有使所述按键本体露出的第一通孔；
    所述弹力臂包括内环结构、外环结构以及设于所述内环结构和外环结构之间的环形缓冲部，所述内环结构通过至少三个卡接位与所述按键本体进行卡接；所述外环结构通过至少三个卡接位与所述上盖进行卡接。
  2. 如权利要求1所述的按键结构，其特征在于，所述PCB板的边缘支撑在所述机构本体的上方，所述机构本体的上表面位于所述PCB板的下方设有第一凸起。
  3. 如权利要求1或2所述的按键结构，其特征在于，所述按键本体由硬塑料制成，所述弹力臂由软塑料或硅胶制成。
  4. 如权利要求1或2所述的按键结构，其特征在于，所述环形缓冲部的截面为中间薄两端厚的结构。
  5. 如权利要求1或2所述的按键结构，其特征在于，所述内环结构包括至少三个周向布置的内安装座，每个所述内安装座分别通过一个卡接位与所述按键本体进行卡接；
    所述外环结构包括至少三个周向布置的外安装座，每个所述外安装座分别通过一个卡接位与所述上盖进行卡接。
  6. 如权利要求5所述的按键结构，其特征在于，所述内安装座上设有第一定位孔，所述按键本体上设有与所述第一定位孔相对应的第二凸起，所述第二凸起和第一定位孔卡接；
    所述外安装座上设有第二定位孔，所述上盖上设有与所述第二定位孔相对应的第三凸起，所述第三凸起与第二定位孔卡接。
  7. 如权利要求5所述的按键结构，其特征在于，所述内安装座和外安装座均设置为均匀布置的四个。
  8. 如权利要求2所述的按键结构，其特征在于，所述第一凸起位于所述按键开关的正下方。
  9. 如权利要求1或2所述的按键结构，其特征在于，所述上盖的下表面设有多个连接柱，所述PCB板和机构本体上分别设有与所述连接柱相对应的过孔，一连接件依次穿过所述机构 本体的过孔和所述PCB板的过孔与所述上盖的连接柱连接。
  10. 如权利要求9所述的按键结构，其特征在于，所述上盖的上表面与所述连接柱相对的位置设有第四凸起。
  11. 如权利要求1或2所述的按键结构，其特征在于，所述按键结构还包括与所述上盖相互盖合的下盖，所述下盖上设有使所述机构本体露出的第二通孔。
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