WO2023015800A1 - 薄膜开关 - Google Patents

薄膜开关 Download PDF

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Publication number
WO2023015800A1
WO2023015800A1 PCT/CN2021/138429 CN2021138429W WO2023015800A1 WO 2023015800 A1 WO2023015800 A1 WO 2023015800A1 CN 2021138429 W CN2021138429 W CN 2021138429W WO 2023015800 A1 WO2023015800 A1 WO 2023015800A1
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WO
WIPO (PCT)
Prior art keywords
hole
bottom plate
diaphragm
groove
membrane
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PCT/CN2021/138429
Other languages
English (en)
French (fr)
Inventor
丁秀琴
张勰军
卢俊生
吴磊
邱泽安
Original Assignee
昆山兴协和科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 昆山兴协和科技股份有限公司 filed Critical 昆山兴协和科技股份有限公司
Priority to CN202180004017.2A priority Critical patent/CN114375482A/zh
Publication of WO2023015800A1 publication Critical patent/WO2023015800A1/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
    • H01H13/04—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
    • H01H13/70—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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/84—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by ergonomic functions, e.g. for miniature keyboards; characterised by operational sensory functions, e.g. sound feedback
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/86—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by the casing, e.g. sealed casings or casings reducible in size

Definitions

  • the invention belongs to the technical field of electric switches, and in particular relates to a membrane switch.
  • Membrane switch is a new type of electronic switch, which is used to control the on-off of the circuit where it is located. It is widely used in the assembly of various key panels, computer keyboards and other products. Most of the existing membrane switches make the conductors in the pressing chamber interact with each other through the deformation of the diaphragm. Contact realizes the conduction function. In order to realize the compression and rebound of the pressing chamber, the pressing chamber cannot be completely sealed, and how to waterproof becomes a problem.
  • Chinese patent CN207529861U discloses a technical solution to prolong the travel distance of water vapor by setting air channels to avoid water vapor from entering, but this type of solution has at least the following defects:
  • the air passage is set on the interlayer between the upper and lower diaphragms, which will expose the circuit coated on the diaphragm to the air through the air passage.
  • the circuit is easy to oxidize, prone to poor contact and other phenomena, and is not durable;
  • the pressing chamber and the airway are connected through the thin slits on the side wall of the pressing chamber, the opening is small, and the direction of the slits is perpendicular to the force application direction of the membrane switch, the exhaust smoothness is low, and the pressing comfort is poor;
  • the waterproof performance is average, and it is easily damaged when immersed in water
  • the object of the present invention is to overcome the disadvantages of the prior art, and provide a membrane switch with durability, smooth exhaust, good pressing comfort, good waterproof performance and convenient processing.
  • the membrane switch comprises:
  • a partition the partition extends in the horizontal direction, and the partition is provided with a first through hole penetrating the partition in the up and down direction;
  • the diaphragm is attached to the upper and lower surfaces of the partition and is adhesively connected with the partition, and the diaphragm includes an upper diaphragm and a lower diaphragm;
  • the pressing cavity is formed by a cavity surrounded by the hole wall of the first through hole, the lower surface of the upper diaphragm, and the upper surface of the lower diaphragm;
  • the conductor is located in the pressing chamber, the conductor includes an upper conductor arranged on the lower surface of the upper diaphragm and a lower conductor arranged on the upper surface of the lower diaphragm, the upper The outer wall of the conductor is wrapped with an upper isolation layer sintered with a carbon paste layer, and the outer wall of the lower conductor is wrapped with a lower isolation layer sintered with a carbon paste layer;
  • the membrane switch also includes a bottom plate that is bonded and connected to the lower surface of the lower membrane through an adhesive layer, the adhesive layer has interval grooves, and the upper surface of the bottom plate is provided with a groove that is depressed downward and has a bottom wall , the groove is located directly below the spacing groove and communicates with the spacing groove, the groove and the spacing groove together form an air channel communicating with the outside world, and the air channel is provided with a A flowing waterproof and breathable membrane, the air passage also communicates with the pressing chamber through the second through hole provided on the lower diaphragm, and the axis line of the second through hole is connected with the first through hole axes are parallel to each other.
  • the airway includes a main airway and a branch airway, the cross-sectional area of the main airway is larger than that of the branch airway, one end of the main airway communicates with the outside world, and the main airway The other end of the channel communicates with the pressing chamber through the bronchial channel and the second through hole.
  • the number of the airways is equal to the number of the pressing cavities, and the airways are provided in one-to-one correspondence with the pressing cavities.
  • the length of the main airway is shorter than that of any one of the branch airways, and the main airway is formed by the confluence of ends of all the branch airways away from the compression chamber.
  • the waterproof and gas-permeable membrane is in the shape of a plunger, and the waterproof and gas-permeable membrane is plugged in the opening where the main airway communicates with the outside world.
  • the length of the main airway is greater than the length of any one of the branch airways, and the projection of the main airway in the vertical direction is S-shaped.
  • the waterproof and gas-permeable membrane is sheet-shaped, and the waterproof and gas-permeable membrane is embedded in the opening where the main airway communicates with the outside world.
  • the distance between the bottom wall of the groove and the bottom surface of the bottom plate is less than or equal to the thickness of the bottom plate.
  • the bottom plate includes a first bottom plate and a second bottom plate that are laminated up and down, the first bottom plate is provided with a through groove penetrating the first bottom plate in the up and down direction, the second bottom plate is a flat plate, and the The side wall of the through groove and the upper surface of the second bottom plate enclose the groove.
  • the distance between the axis of the second through hole and the axis of the first through hole is less than or equal to the radius difference between the first through hole and the second through hole.
  • the present invention has the following advantages compared with the prior art:
  • the axis line of the second through hole is parallel to the axis line of the first through hole.
  • the processing is convenient. After the diaphragm and the separator are assembled, it is only necessary to press the groove on the bottom plate, and then roll the adhesive glue on the surface of the bottom plate, and then paste it and bond it to the bottom of the lower diaphragm. The surface is sufficient, and the glue layer and spacer grooves can be formed naturally, without the need to precisely control the amount of glue and the location of the brush.
  • FIG. 1 is a schematic top view of Embodiment 1 of the present invention.
  • Fig. 2 is a schematic cross-sectional view along A-A direction in Fig. 1 .
  • Fig. 3 is a schematic top view of Embodiment 2 of the present invention.
  • Fig. 4 is a schematic cross-sectional view along the B-B direction in Fig. 3 .
  • Fig. 5 is a schematic top view of Embodiment 3 of the present invention.
  • FIG. 6 is a schematic cross-sectional view along C-C in FIG. 5 .
  • Fig. 7 is a schematic top view of Embodiment 4 of the present invention.
  • FIG. 8 is a schematic cross-sectional view along the D-D direction in FIG. 7 .
  • the up and down directions described in the present invention refer to the up and down directions in Fig. 2 and Fig. 4 .
  • the membrane switch provided by the present invention includes: a partition 10, a diaphragm 20, a pressing cavity 30, a conductor 40 and a bottom plate 50, wherein the partition 10 extends in the horizontal direction, and the partition 10 There is a first through hole 11 penetrating through the partition 10 in the upper and lower directions.
  • the diaphragm 20 includes an upper diaphragm 21 and a lower diaphragm 22.
  • the upper diaphragm 21 is attached to the upper surface of the partition 10 and glued to the partition 10.
  • the lower diaphragm 22 is attached to the lower surface of the partition 10 and bonded with the partition 10, the pressing chamber 30 is composed of the hole wall of the first through hole 11, the lower surface 211 of the upper diaphragm 21 and the lower diaphragm 21.
  • the cavity enclosed between the upper surfaces 221 of 22 constitutes, the conductor 40 is located in the pressing cavity 30, the conductor 40 includes the upper conductor 41 arranged on the lower surface 211 of the upper diaphragm 21 and the upper conductor 41 arranged on the upper surface 221 of the lower diaphragm 22
  • the lower conductor 42, the outer wall of the upper conductor 41 includes an upper isolation layer 411, the outer wall of the lower conductor 42 is wrapped with a lower isolation layer 421, when the upper isolation layer 411 and the lower isolation layer 412 are in contact, the upper conductor 41 Conducting with the lower conductor 42, the upper isolation layer 411 is formed by sintering the carbon paste layer printed on the outer wall of the upper conductor 41 by screen printing, and the lower isolation layer 421 is formed by sintering the carbon paste layer printed on the outer wall of the lower conductor 42 by screen printing.
  • the bottom plate 50 is attached to the bottom of the lower diaphragm 22
  • the lower surface 222 is bonded to the lower diaphragm 22 through the glue layer 51.
  • the glue layer 51 has a spacer groove 511, and the spacer groove 511 penetrates the glue layer 51 along the vertical direction.
  • the upper surface of the bottom plate 50 is provided with a downward depression and has a bottom wall.
  • the groove 52 is located directly below the spacing groove 511 and communicates with the spacing groove 511, the groove 52 is formed by the indentation pressed on the upper surface of the bottom plate 50, the bottom wall of the groove 52 is between The distance between them is smaller than the thickness of the bottom plate 50, the groove 52 and the spacer groove 511 together form an air passage 60 communicating with the outside world, the air passage 60 is provided with a waterproof and breathable membrane 61 for blocking the flow of water vapor, and the air passage 60 is also provided on the lower membrane.
  • the second through hole 223 on the sheet 22 communicates with the pressing cavity 30, the axis of the second through hole 223 is parallel to the axis of the first through hole 11, and the axis of the second through hole 223 is parallel to the axis of the first through hole.
  • the distance between the axes of the holes 11 is equal to the radius difference between the first through hole 11 and the second through hole 223 .
  • the axis line of the second through hole is parallel to the axis line of the first through hole.
  • the processing is convenient. After the diaphragm and the separator are assembled, it is only necessary to press the groove on the bottom plate, and then roll the adhesive glue on the surface of the bottom plate, and then paste it and bond it to the bottom of the lower diaphragm.
  • the surface is enough, and the glue layer and interval groove can be formed naturally, without precise control of the amount of glue and the brushing position, and a small amount of excess glue can be applied by roller to ensure the sealing and bonding between the bottom plate and the lower diaphragm to avoid Small gaps interfere with the airway or cause leakage.
  • excess glue can overflow on the bottom wall of the groove and flow evenly, which has little effect on the cross-sectional area of the airway.
  • hot pressing and other pressing methods are required when pressing the groove. The pressing method does not elastically recover, and the pressing position of the groove needs to correspond to the position of the second through hole.
  • the airway 60 includes a main airway 62 and a branch airway 63, the cross-sectional area of the main airway 62 is larger than that of the branch airway 63, and one end of the main airway 62 runs through the side wall of the membrane switch An opening 64 communicating with the outside world is formed. There is only one opening 64. The other end of the main airway 62 communicates with the pressing chamber 30 through the branch airway 63 and the second through hole 223.
  • the first through hole 11 has multiple And set at intervals, so that there are multiple compression chambers 30, the number of branch airways 63 is equal to the number of compression chambers 30, the branch airways 63 are set in one-to-one correspondence with the compression chambers 30, and the length of the main airway 62 is much smaller than The length of any branch airway 63, the main airway 62 is formed by the confluence of all the end portions of the branch airways 63 away from the compression cavity 30, the main airway 62 is straightly arranged, and the waterproof and breathable membrane 61 is in the shape of a plunger, and the waterproof and breathable membrane 61 is set and tightened in the opening 64 from the outside to the inside.
  • the difference between the cross-sectional area of the main airway and the bronchial airway can be used to slow down the speed of gas entering and leaving the main airway, thereby avoiding mutual interference between compression chambers;
  • a waterproof and breathable membrane can realize waterproof protection for all pressing chambers, with low cost and low production difficulty
  • the waterproof and breathable membrane is located in the opening and on the side of the membrane switch, which has a good fixing effect, is not easy to detect, has a good appearance and is not easy to be damaged.
  • the second embodiment is basically the same as the first embodiment, the difference is that in the second embodiment, the length of the main airway 62 is much longer than the length of any branch airway 63, and the main airway
  • the projection of the channel 62 in the up and down direction is S-shaped, and the waterproof and breathable membrane 61 is sheet-shaped, and the waterproof and breathable membrane 61 is embedded and tightened at the opening 64.
  • the S-shaped bend further prolongs the travel distance of water vapor, increasing the difficulty for water vapor to enter the pressing chamber.
  • the third embodiment is basically the same as the first embodiment, the difference is that in the third embodiment, the bottom plate 50 includes a first bottom plate 53 and a second bottom plate 54 that fit up and down, and the first bottom plate 53 There is a through groove 531 that runs through the first bottom plate 53 in the up and down direction, the second bottom plate 54 is a flat plate, and the side wall of the through groove 531 and the upper surface of the second bottom plate 54 form a groove 52, which can bring additional
  • the advantage is that it is only necessary to punch out the through groove 531 on the first bottom plate 53 first, then roll-coat the upper and lower surfaces of the first bottom plate 53 with adhesive, and then bond the second bottom plate 54 to the lower film through the first bottom plate 53.
  • the fourth embodiment is basically the same as the second embodiment, the difference is that in the fourth embodiment, the bottom plate 50 includes a first bottom plate 53 and a second bottom plate 54 that fit up and down, and the first bottom plate 53 There is a through groove 531 that runs through the first bottom plate 53 in the up and down direction, the second bottom plate 54 is a flat plate, and the groove wall of the through groove 531 and the upper surface of the second bottom plate 54 form a groove 52, which can bring additional
  • the advantage is that it is only necessary to punch out the through groove 531 on the first bottom plate 53 first, then roll-coat the upper and lower surfaces of the first bottom plate 53 with adhesive, and then bond the second bottom plate 54 to the lower film through the first bottom plate 53.

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Abstract

本发明提供的薄膜开关，包括开设有第一通孔的隔板、粘接在隔板上下表面的膜片、由第一通孔孔壁及膜片相对侧表面围成的按压腔、位于按压腔内的导电体、通过胶层粘接连接在下膜片下表面的底板，胶层具有间隔槽，底板上表面设有向下凹陷、具有底壁、位于间隔槽正下方并与间隔槽连通的凹槽，凹槽和间隔槽共同构成与外界连通的气道，通过在气道内设置用于阻挡水汽流动的防水透气膜，利用下膜片上的第二通孔连通气道与按压腔，使第二通孔与第一通孔的轴心线相平行，使得上下膜片之间的电路不会暴露在气道内的空气中，经久耐用，按压时排气顺畅、按压舒适性好，由于防水透气膜的存在，具有防水功能，无需精准控制胶的用量及涂刷位置，加工方便。

Description

薄膜开关 技术领域
本发明属于电开关技术领域，具体涉及一种薄膜开关。
背景技术
薄膜开关是一种新型电子开关，用于控制其所在回路的通断，广泛应用于组装各类按键面板、电脑键盘等产品，现有的薄膜开关大多通过膜片变形使按压腔内导电体相互接触实现导通功能，为了实现按压腔的压缩与回弹，按压腔不能完全密闭，如何防水就成了一个问题。
现有的解决思路是尽可能提升水进入按压腔的难度，如中国专利CN207529861U就公开了通过设置气道延长水汽的行进距离以避免水汽进入的技术方案，但这类方案至少存在以下缺陷：
1.气道设置在上下膜片之间的隔层上，会使涂覆在膜片上的电路通过气道暴露在空气中，电路易氧化，容易出现接触不良等现象，不耐用；
2.按压腔与气道通过按压腔侧壁上的细缝相连通，开口小，且细缝朝向与薄膜开关的施力方向相垂直，排气顺畅度低，按压舒适性较差；
3.防水性能一般，浸水时易损坏；
4.气道及细缝的结构增大了薄膜开关的制造难度，加工不便。
发明内容
本发明的目的是为了克服现有技术的缺点，提供一种经久耐用、排气顺畅、按压舒适性好、防水性能好且加工方便的薄膜开关。
为达到上述目的，本发明采用的技术方案是，薄膜开关，包括：
隔板，所述隔板沿水平方向延伸，所述隔板上开设有沿上下方向贯穿所述隔板的第一通孔；
膜片，所述膜片贴合在所述隔板的上下表面并与所述隔板粘接连接，所述膜片包括上膜片和下膜片；
按压腔，所述按压腔由所述第一通孔的孔壁、所述上膜片的下表面和所述下膜片的上表面之间围成的空腔构成；
导电体，所述导电体位于所述按压腔内，所述导电体包括设置在所述上膜片下表面的上导电体和设置在所述下膜片上表面的下导电体，所述上导电体的外壁包裹有由碳浆层烧结而成的上隔离层，所述下导电体的外壁包裹有由碳浆层烧结而成的下隔离层；
所述薄膜开关还包括通过胶层粘接连接在所述下膜片的下表面的底板，所述胶层具有间 隔槽，所述底板的上表面设有向下凹陷且具有底壁的凹槽，所述凹槽位于所述间隔槽的正下方并与所述间隔槽相连通，所述凹槽和所述间隔槽共同构成与外界连通的气道，所述气道内设有用于阻挡水汽流动的防水透气膜，所述气道还通过开设在所述下膜片上的第二通孔与所述按压腔相连通，所述第二通孔的轴心线与所述第一通孔的轴心线相平行。
优选地，所述气道包括主气道与支气道，所述主气道的截面积大于所述支气道的截面积，所述主气道的一端部与外界连通，所述主气道的另一端部通过所述支气道及所述第二通孔与所述按压腔相连通。
进一步优选地，所述按压腔有多个，所述支气道的数量与所述按压腔的数量相等，所述支气道与所述按压腔一一对应地设置。
进一步优选地，所述主气道的长度小于任意一条所述支气道的长度，所述主气道由所有所述支气道远离所述按压腔的端部汇合而成。
进一步优选地，所述防水透气膜呈柱塞状，所述防水透气膜塞设在所述主气道与外界连通的开口内。
进一步优选地，所述主气道的长度大于任意一条所述支气道的长度，所述主气道在上下方向上的投影呈S形。
进一步优选地，所述防水透气膜为片状，所述防水透气膜嵌设在所述主气道与外界连通的开口内。
优选地，所述凹槽的底壁距所述底板下表面之间的间距小于等于所述底板的厚度。
优选地，所述底板包括上下贴合的第一底板和第二底板，所述第一底板上开设有沿上下方向贯穿所述第一底板的贯通槽，所述第二底板为平板，所述贯通槽的侧壁与所述第二底板的上表面围成所述凹槽。
进一步优选地，所述第二通孔轴心线与所述第一通孔轴心线之间的距离小于等于所述第一通孔与所述第二通孔的半径差。
由于上述技术方案运用，本发明与现有技术相比具有下列优点：
1.通过将底板贴合在下膜片的下表面并与下膜片粘接连接，并利用底板上设置的凹槽和底板与下膜片之间胶层的间隔槽共同构成与外界连通的气道，使得上下膜片之间的电路不会暴露在气道的空气中，可以通过膜片与隔板的粘接连接对上下膜片之间的电路进行隔绝，使得该薄膜开关能够经久耐用；
2.通过在下膜片上开设有用于连通按压腔与气道的第二通孔，使第二通孔的轴心线与第一通孔的轴心线相平行，在按压时，薄膜开关的施力方向与第二通孔的轴心线相平行，排气更加顺畅，按压舒适性更好；
3.通过在气道内嵌设置用于阻挡水汽流动的防水透气膜，在浸入水中时，水被阻挡在防水透气膜外，能够避免水沿气道进一步进入按压腔，防水性能好；
4.加工方便，在膜片及隔板组装完成后，只需在底板上压制出凹槽，再在底板上表面辊涂粘接用胶，再将其贴合并粘接到下膜片的下表面即可，能够自然形成胶层及间隔槽，无需精准控制胶的用量及涂刷位置。
附图说明
图1是本发明实施例一的俯视示意图。
图2是图1中A-A方向的剖视示意图。
图3是本发明实施例二的俯视示意图。
图4是图3中B-B方向的剖视示意图。
图5是本发明实施例三的俯视示意图。
图6是图5中C-C方向的剖视示意图。
图7是本发明实施例四的俯视示意图。
图8是图7中D-D方向的剖视示意图。
其中：10.隔板；11.第一通孔；20.膜片；21.上膜片；211.下表面；22.下膜片；221.上表面；222.下表面；223.第二通孔；30.按压腔；40.导电体；41.上导电体；411.上隔离层；42.下导电体；421.下隔离层；50.底板；51.胶层；511.间隔槽；512.溢胶；52.凹槽；53.第一底板；531.贯通槽；54.第二底板；60.气道；61.防水透气膜；62.主气道；63.支气道；64.开口。
具体实施方式
下面结合附图对本发明的较佳实施例进行详细阐述，以使本发明的优点和特征更易于被本领域技术人员理解，从而对本发明的保护范围做出更为清楚明确的界定。
本发明描述的上下方向是指图2、图4中的上下方向。
实施例一：
如图1和图2所示，本发明提供的薄膜开关，包括：隔板10、膜片20、按压腔30、导电体40和底板50，其中，隔板10沿水平方向延伸，隔板10上开设有沿上下方向贯穿隔板10的第一通孔11，膜片20包括上膜片21和下膜片22，上膜片21贴合在隔板10的上表面并与隔板10粘接连接，下膜片22贴合在隔板10的下表面并与隔板10粘接连接，按压腔30由第一通孔11的孔壁、上膜片21的下表面211和下膜片22的上表面221之间围成的空腔构成，导电体40位于按压腔30内，导电体40包括设置在上膜片21下表面211的上导电体41和设置在下膜片22上表面221的下导电体42，上导电体41的外壁包括有上隔离层411，下 导电体42的外壁包裹有下隔离层421，在上隔离层411和下隔离层412相接触时，上导电体41与下导电体42相导通，上隔离层411由丝网印刷在上导电体41外壁上的碳浆层烧结而成，下隔离层421由丝网印刷在下导电体42外壁上的碳浆层烧结而成，在水汽进入按压腔30的极端情况下，能够避免导电体40的腐蚀，使得该薄膜开关仍能触发，特别适合于条件恶劣的野外环境使用，底板50贴合在下膜片22的下表面222并与下膜片22通过胶层51粘接连接，胶层51具有间隔槽511，间隔槽511沿上下方向贯穿胶层51，底板50的上表面设有向下凹陷且具有底壁的凹槽52，凹槽52位于间隔槽511的正下方并与间隔槽511相连通，凹槽52由压制在底板50上表面的压痕构成，凹槽52的底壁距底板50下表面之间的间距小于底板50的厚度，凹槽52和间隔槽511共同构成与外界连通的气道60，气道60内设有用于阻挡水汽流动的防水透气膜61，气道60还通过开设在下膜片22上的第二通孔223与按压腔30相连通，第二通孔223的轴心线与第一通孔11的轴心线相平行，第二通孔223轴心线与第一通孔11轴心线之间的距离等于第一通孔11与第二通孔223的半径差。
这样设置的好处在于：
1.通过将底板贴合在下膜片的下表面并与下膜片粘接连接，并利用底板上设置的凹槽和底板与下膜片之间胶层的间隔槽共同构成与外界连通的气道，使得上下膜片之间的电路不会暴露在气道内的空气中，可以通过膜片与隔板的粘接连接对上下膜片之间的电路进行隔绝，使得该薄膜开关能够经久耐用；
2.通过在下膜片上开设有用于连通按压腔与气道的第二通孔，使第二通孔的轴心线与第一通孔的轴心线相平行，在按压时，薄膜开关的施力方向与第二通孔的轴心线相平行，排气更加顺畅，按压舒适性更好；
3.通过在气道内嵌设置用于阻挡水汽流动的防水透气膜，在浸入水中时，水被阻挡在防水透气膜外，能够避免水沿气道进一步进入按压腔，防水性能好；
4.加工方便，在膜片及隔板组装完成后，只需在底板上压制出凹槽，再在底板上表面辊涂粘接用胶，再将其贴合并粘接到下膜片的下表面即可，能够自然形成胶层及间隔槽，无需精准控制胶的用量及涂刷位置，还能通过辊涂少许过量胶的方式，确保底板与下膜片之间的密封粘接，避免出现细小缝隙干涉气道或造成泄漏，同时，过量的胶能够溢出在凹槽的底壁上并进行均流，对气道截面积的影响小，当然，压制凹槽时需要采用热压等压制后不会弹性复原的压制方式，并且，凹槽的压制位置需要与第二通孔的位置相对应。
在本实施例中，气道60包括主气道62与支气道63，主气道62的截面积大于支气道63的截面积，主气道62的一端部贯穿该薄膜开关的侧壁形成与外界连通的开口64，开口64有且仅有一个，主气道62的另一端部通过支气道63及第二通孔223与按压腔30相连通，第一 通孔11有多个并相间隔地设置，使得按压腔30也有多个，支气道63的数量与按压腔30的数量相等，支气道63与按压腔30一一对应地设置，主气道62的长度远小于任意一条支气道63的长度，主气道62由所有支气道63远离按压腔30的端部汇合而成，主气道62平直设置，防水透气膜61呈柱塞状，防水透气膜61自外向内塞设并涨紧在开口64内。
这样设置的好处在于：
1.能够利用主气道和支气道截面积的差值，减缓气体进出主气道的速度，从而避免按压腔之间的相互干扰；
2.能够通过一个防水透气膜实现对所有按压腔的防水保护，成本低，生产难度低；
3.短时间浸水后沥干时，只需观察防水透气膜的干燥程度即可判断沥干效果；
4.还能够方便防水透气膜的拆装更换，便于长时间浸水后的快速复原；
5.防水透气膜位于开口内并位于该薄膜开关的侧面，固定效果好，不易察觉，美观度好，不易损坏。
实施例二：
如图3和图4所示，实施例二与实施例一基本相同，不同之处在于，实施例二中，主气道62的长度远大于任意一条支气道63的长度，并且，主气道62在上下方向上的投影呈S形，防水透气膜61为片状，防水透气膜61嵌设并涨紧在开口64处，这样设置能够带来的额外好处在于，能够利用主气道的S形弯曲进一步延长水汽的行进距离，增大水汽进入按压腔的难度。
实施例三：
如图5和图6所示，实施例三与实施例一基本相同，不同之处在于，实施例三中，底板50包括上下贴合的第一底板53和第二底板54，第一底板53上开设有沿上下方向贯穿第一底板53的贯通槽531，第二底板54为平板，贯通槽531的侧壁与第二底板54的上表面围成凹槽52，这样设置能够带来的额外好处在于，只需先在第一底板53上冲裁出贯通槽531，再在第一底板53的上下表面辊涂粘接用胶，再将第二底板54通过第一底板53粘接在下膜片22上即可，无需压制凹槽，能够进一步降低生产难度，并提升生产效率，在薄膜开关上按压腔30的位置和/或第二通孔223的位置进行调整时，只需改变第一底板53上贯通槽531的冲裁位置即可。
实施例四：
如图7和图8所示，实施例四与实施例二基本相同，不同之处在于，实施例四中，底板50包括上下贴合的第一底板53和第二底板54，第一底板53上开设有沿上下方向贯穿第一底板53的贯通槽531，第二底板54为平板，贯通槽531的槽壁与第二底板54的上表面围成凹 槽52，这样设置能够带来的额外好处在于，只需先在第一底板53上冲裁出贯通槽531，再在第一底板53的上下表面辊涂粘接用胶，再将第二底板54通过第一底板53粘接在下膜片22上即可，无需压制凹槽，能够进一步降低生产难度，并提升生产效率，在薄膜开关上按压腔30的位置和/或第二通孔223的位置进行调整时，只需改变第一底板53上贯通槽531的冲裁位置即可。
需要说明的是，本发明中的远小于是指小于20％、远大于是指大于5倍以上。
上述实施例只为说明本发明的技术构思及特点，其目的在于让熟悉此项技术的人士能够了解本发明的内容并据以实施，并不能以此限制本发明的保护范围。凡根据本发明精神实质所作的等效变化或修饰，都应涵盖在本发明的保护范围之内。

Claims (10)

  1. 薄膜开关，包括：
    隔板，所述隔板沿水平方向延伸，所述隔板上开设有沿上下方向贯穿所述隔板的第一通孔；膜片，所述膜片贴合在所述隔板的上下表面并与所述隔板粘接连接，所述膜片包括上膜片和下膜片；
    按压腔，所述按压腔由所述第一通孔的孔壁、所述上膜片的下表面和所述下膜片的上表面之间围成的空腔构成；
    导电体，所述导电体位于所述按压腔内，所述导电体包括设置在所述上膜片下表面的上导电体和设置在所述下膜片上表面的下导电体，所述上导电体的外壁包裹有由碳浆层烧结而成的上隔离层，所述下导电体的外壁包裹有由碳浆层烧结而成的下隔离层；
    其特征在于：
    所述薄膜开关还包括通过胶层粘接连接在所述下膜片的下表面的底板，所述胶层具有间隔槽，所述底板的上表面设有向下凹陷且具有底壁的凹槽，所述凹槽位于所述间隔槽的正下方并与所述间隔槽相连通，所述凹槽和所述间隔槽共同构成与外界连通的气道，所述气道内设有用于阻挡水汽流动的防水透气膜，所述气道还通过开设在所述下膜片上的第二通孔与所述按压腔相连通，所述第二通孔的轴心线与所述第一通孔的轴心线相平行。
  2. 根据权利要求1所述的薄膜开关，其特征在于：所述气道包括主气道与支气道，所述主气道的截面积大于所述支气道的截面积，所述主气道的一端部与外界连通，所述主气道的另一端部通过所述支气道及所述第二通孔与所述按压腔相连通。
  3. 根据权利要求2所述的薄膜开关，其特征在于：所述按压腔有多个，所述支气道的数量与所述按压腔的数量相等，所述支气道与所述按压腔一一对应地设置。
  4. 根据权利要求3所述的薄膜开关，其特征在于：所述主气道的长度小于任意一条所述支气道的长度，所述主气道由所有所述支气道远离所述按压腔的端部汇合而成。
  5. 根据权利要求4所述的薄膜开关，其特征在于：所述防水透气膜呈柱塞状，所述防水透气膜塞设在所述主气道与外界连通的开口内。
  6. 根据权利要求3所述的薄膜开关，其特征在于：所述主气道的长度大于任意一条所述支气道的长度，所述主气道在上下方向上的投影呈S形。
  7. 根据权利要求6所述的薄膜开关，其特征在于：所述防水透气膜为片状，所述防水透气膜嵌设在所述主气道与外界连通的开口内。
  8. 根据权利要求1所述的薄膜开关，其特征在于：所述凹槽的底壁距所述底板下表面之间的间距小于等于所述底板的厚度。
  9. 根据权利要求1所述的薄膜开关，其特征在于：所述底板包括上下贴合的第一底板和第二 底板，所述第一底板上开设有沿上下方向贯穿所述第一底板的贯通槽，所述第二底板为平板，所述贯通槽的侧壁与所述第二底板的上表面围成所述凹槽。
  10. 根据权利要求1-9中任意一项所述的薄膜开关，其特征在于：所述第二通孔轴心线与所述第一通孔轴心线之间的距离小于等于所述第一通孔与所述第二通孔的半径差。
PCT/CN2021/138429 2021-08-11 2021-12-15 薄膜开关 WO2023015800A1 (zh)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001006490A (ja) * 1999-06-17 2001-01-12 Smk Corp メンブレンスイッチ
CN204130405U (zh) * 2014-08-13 2015-01-28 广东德怡电子科技有限公司 一种薄膜开关
CN106158480A (zh) * 2016-08-01 2016-11-23 昆山兴协和光电科技有限公司 一种薄膜开关及其制作方法
CN106847592A (zh) * 2017-01-25 2017-06-13 苏州达方电子有限公司 薄膜开关结构及其制造方法
CN206877883U (zh) * 2017-07-17 2018-01-12 高永溪 一种薄膜开关
CN107993869A (zh) * 2017-12-21 2018-05-04 昆山兴协和光电科技有限公司 键盘电路板及其制造方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001006490A (ja) * 1999-06-17 2001-01-12 Smk Corp メンブレンスイッチ
CN204130405U (zh) * 2014-08-13 2015-01-28 广东德怡电子科技有限公司 一种薄膜开关
CN106158480A (zh) * 2016-08-01 2016-11-23 昆山兴协和光电科技有限公司 一种薄膜开关及其制作方法
CN106847592A (zh) * 2017-01-25 2017-06-13 苏州达方电子有限公司 薄膜开关结构及其制造方法
CN206877883U (zh) * 2017-07-17 2018-01-12 高永溪 一种薄膜开关
CN107993869A (zh) * 2017-12-21 2018-05-04 昆山兴协和光电科技有限公司 键盘电路板及其制造方法

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