1233133 玖、發明說明： 【發明所屬之技術領域】 本發明關於作為各種電子設備的操作用開關而使用的壓 扣開關的結構，尤其關於利用橡膠彈簣作為翻轉彈菁的壓 扣開關的結構。 【先前技術】 現有的壓扣開關的結構，已知以：在對固定接點進行 安裝的外殼的收容部内，佈置與固定接點相對置的可動接 點、以及把該可動接點按壓到固定接點側的橡膠彈簧，利 用該橡膠彈簧的彈射力來使操作用的芯柱重定（例如參見 專利文獻1)。 以下根據附圖，詳細說明現有的壓扣開關的結構。 圖Π疋表示現有的壓扣開關的俯視圖。圖12是表示現有 的壓扣開關的剖視圖。 圖中，外殼3 1利用合成樹脂等絕緣材料而製成呈上面一 側開口的箱狀。在該外殼3 1中在下面側設置了具有收容壁 部31b的收容部3ia，在該收容部31&的内底部，埋設了對金 屬板等導電材料進行彎曲而形成的一對固定接點3 2、3 3。 此一對固定接點32、33的一端側從外殼31的内底面露出， 分別形成接點部32a、33a，另一端側引出到外殼31的外面 ，分別形成端子部32b、33b。 可動接點34用具有彈性的導電性薄金屬板來製成，其結 構包括：圓環狀的邊條部34a、以及在其中央被翹起來的一 體化的接觸片34b。上述可動接點34被設置成，上述邊條部 90736.doc5 1233133 34at裝成與上述固定接點33的接點部33a相導通的狀態， 上述接觸片34b與上述固定端子32的接點部32a以相分離的 狀態被相對置的設置。 橡膠彈簧35由具有撓性的彈性體或矽橡膠等製成，外形 是下面開口狀的圓頂形，其包括：在按壓和重定時被彎曲 ，能施加彈射力的裙部35a、形成在該裙部35a的上部的按 壓面部35b、以及形成在下部的外周緣部35c。該外周緣部 35c插入並被保持在上述外殼31的收容部Ma所設置的收容 壁部3 1 b内。 並且，在上述按壓面部35b的下面側形成動作突部35d， 该動作突部35d的前端對上述可動接點34的接觸片3仆進行 按壓，由此能使其與上述固定端子32的接點部32a相導通。 芯柱36用合成樹脂等絕緣材料製造，它被插入到上述外 殼31的開口部内，該芯柱36的按壓突部36a搭接到上述橡膠 彈簧35的按壓面部35b上，把上述橡膠彈簧35向下方按壓。 芯柱36被按壓後，上述橡膠彈簧35的裙部35&進行彎曲，在 重定時借助其彈射力而恢復到初始位置上。 專利文獻1 特開2000-260256號公報 然而，在上述現有壓扣開關的結構中，在用於收容設置 在上述外殼31的收容部31a内的上述橡膠彈簧35的收容壁 部3 lb和上述橡膠彈簧35的外周緣部35c之間，考慮到組裝 橡膠彈簧35時的易組裝性，使收容壁部3化的内徑尺寸大於 橡膠彈簧35的外周緣部35c，形成了間隙G。 因此，存在的問題是··收容壁部3ib内的橡膠彈簧35的位 90736.doc5 1233133 置偏移，可能造成橡膠彈簧35端部受壓，影響操作感，或 者灰塵從間隙G處侵入到接點内部，造成接觸不良。並且， 由於加上在間隙G内按壓時橡膠彈簧35的外周緣部3允膨脹 到與收容壁部3 lb相搭接為止的移動量，所以，作動力的峰 值位置（橡膠彈簧35c彎曲進行翻轉的點）向後（接點的導通 位置側）偏移，所以，翻轉後的行程縮短，得不到良好的操 作感。 【發明内容】 所以’本發明的目的在於解決上述問題，提供一種壓扣 開關，即在按壓橡膠彈簧進行翻轉動作時，能獲得希望的 操作感，同時防止灰塵等的侵入，使可動接點和固定接點 的接觸狀態穩定，接觸可靠性高。 為了解決上述問題，本發明，採用以下技術方案： 第1方案，其特徵在於具有： 外殼，其具有收容部； 固定接點’其被固定安裝在上述收容部内； 可動接點’其與該固定接點相向設置；以及 橡膠彈簧，其下端外周緣部被保持在上述收容部内，在 與上端按壓面部之間具有能夠彎曲的裙部，利用該裙部的 ’考曲來使上述可動接點與上述固定接點進行接觸和分離； 分別以從下面側向上面側擴開的傾斜面或圓弧面來形成 上述橡膠彈簧的下端外周緣部、以及對該下端外周緣部進 行保持的上述外殼的收容壁部的對置面。 第2方案，其特徵在於：上述外殼的收容壁部的高度，與 90736.doc5 1233133 述橡膠彈育的下端外周緣部的上面側的高度相比，二者 相同，或者高於後者。 Λ"方案其特彳政在於：與上述外殼的收容壁部的擴開角 度相比，上述橡膠彈簀的下端外周緣部的擴開角度較大； 與上述外般的收容壁部和上述橡膝彈簧的下端外周緣部各 自：上面側的尺寸差相比，下面側的尺寸差較大地形成。 弟4方案’其特徵在於：形成了與上述橡膠彈菁的内面側 相連通的空氣流路，該空氣流路與上述橡膠彈著的下端外 周緣部和對該下端外周緣部進行保持的上述外殼的收容壁 部的對置面相連接。 第5方案，其特徵在於，具有被保持在上述外殼的收容部 =旎升降移動’同時對上述橡膠彈簧的上端按壓面部進 仃按壓的心柱’在上述收容部的内壁部上形成了對上述芯 枉料降進行導向的導向槽部，由該導向槽部形成了上述 空氣流路。 第6方案，其特徵在於：上述導向槽部被延伸設置到上述 二殼的底面側，把上述導向槽部的内底部形成在比上述固 疋接點的接點面低一個臺階的位置上。 第7方案’其特徵在於：上述可動接點由具有彈性的金屬 板製成，它被夾持在上述橡夥彈簀的下端外周緣部的下面 側和上述固定接點的上面側，在上述可動接點和上述固定 接點的搭接面上形成突起部，利用該突起部使上述橡膠彈 簧的内面側與上述導向槽部相連通。 【實施方式】 9〇736.doc5 1233133 以下在圖1〜圖9中表示本發 j e - . X 的&扣開關的一實施例。圖 1疋壓扣開關的俯視圖，圖2是 e VL ^ , ^疋，口圖1的2_2線的剖視圖，圖3 疋>口圖1的3-3線的剖視圖，圖 # ^ ^ ^ , 外Λ又的俯視圖，圖5是橡 I弹更的俯視圖，圖6是橡膠 ^ ΛΛ ^ π 的視圖，圖7是可動接 點的俯視圖，圖8是可會7垃& Μ Α, 〜七 疋了動接點的剖視圖。圖9是表示橡膠彈 更的作動力特性的說明圖。 外喊1用合成樹脂等絕緣材1233133 发明 Description of the invention: [Technical field to which the invention belongs] The present invention relates to a structure of a snap switch used as an operation switch of various electronic devices, and more particularly to a structure of a snap switch using a rubber impulse as a flip spring. [Prior art] The structure of the existing push-button switch is known as: arranging a movable contact opposed to the fixed contact in a housing portion of a housing for mounting the fixed contact, and pressing the movable contact to a fixed position The rubber spring on the contact side uses the spring force of the rubber spring to reset the stem for operation (see, for example, Patent Document 1). Hereinafter, the structure of a conventional snap switch will be described in detail with reference to the drawings. Figure Π 疋 shows a top view of a conventional snap switch. Fig. 12 is a sectional view showing a conventional snap switch. In the figure, the casing 31 is formed in a box shape with an upper surface open from an insulating material such as synthetic resin. A housing portion 3ia having a housing wall portion 31b is provided on the lower surface side of the housing 31, and a pair of fixed contacts 3 formed by bending a conductive material such as a metal plate is embedded in the inner bottom portion of the housing portion 31 & 2, 3 3. One end of the pair of fixed contacts 32 and 33 is exposed from the inner bottom surface of the casing 31 to form contact portions 32a and 33a, respectively, and the other end is drawn out of the casing 31 to form terminal portions 32b and 33b, respectively. The movable contact 34 is made of a conductive thin metal plate having elasticity, and the structure includes a ring-shaped edge portion 34a and an integrated contact piece 34b that is tilted in the center. The movable contact 34 is provided in a state where the side strip portion 90736.doc5 1233133 34at is connected to the contact portion 33a of the fixed contact 33, and the contact piece 34b and the contact portion 32a of the fixed terminal 32 Opposed in a phase separated state. The rubber spring 35 is made of a flexible elastomer or silicone rubber, and the outer shape is a dome shape with an opening below. The rubber spring 35 includes a skirt portion 35a that is bent during pressing and re-timing and is capable of applying an ejection force. A pressing portion 35b on the upper portion of the skirt portion 35a and an outer peripheral edge portion 35c formed on the lower portion. The outer peripheral edge portion 35c is inserted into and held in the receiving wall portion 3 1 b provided in the receiving portion Ma of the case 31. Further, an operating protrusion 35d is formed on the lower surface side of the pressing surface portion 35b, and the tip of the operating protrusion 35d presses the contact piece 3 of the movable contact 34, thereby enabling the contact with the fixed terminal 32 The parts 32a are electrically connected. The stem 36 is made of an insulating material such as synthetic resin, and is inserted into the opening of the casing 31. The pressing protrusion 36a of the stem 36 is attached to the pressing surface portion 35b of the rubber spring 35, and the rubber spring 35 is directed toward the opening. Press down. After the stem 36 is pressed, the skirt 35 of the rubber spring 35 is bent, and is returned to the initial position by its ejection force at the time of reset. Patent Document 1 JP-A-2000-260256 However, in the structure of the conventional push-button switch described above, the housing wall portion 3 lb of the rubber spring 35 and the rubber are accommodated in the housing portion 31 a of the housing 31. Considering the ease of assembly when assembling the rubber spring 35 between the outer peripheral edge portions 35c of the spring 35, the inner diameter of the housing wall portion is larger than the outer peripheral edge portion 35c of the rubber spring 35, and a gap G is formed. Therefore, the problem is that the position of the rubber spring 35 in the receiving wall portion 3ib is shifted to 90736.doc5 1233133, which may cause the end of the rubber spring 35 to be compressed, affecting the operation feeling, or dust intruding into the connection from the gap G. Point inside, causing poor contact. In addition, because the amount of movement of the outer peripheral edge portion 3 of the rubber spring 35 allowed to expand to overlap with the receiving wall portion 3 lb when the pressure is applied in the gap G, the peak position of the power (the rubber spring 35c is bent and inverted) (Dot) is shifted backward (on the conductive position side of the contact), so the stroke after reversal is shortened, and a good operation feeling is not obtained. [Summary of the Invention] Therefore, an object of the present invention is to solve the above-mentioned problems, and to provide a push-button switch, that is, when a rubber spring is pressed to perform a turning action, a desired operation feeling can be obtained, and the invasion of dust and the like is prevented. The contact state of the fixed contact is stable and the contact reliability is high. In order to solve the above problems, the present invention adopts the following technical solutions: The first solution is characterized by having: a housing having a receiving portion; a fixed contact 'which is fixedly installed in the receiving portion; a movable contact' which is connected with the fixed portion The contacts are arranged opposite to each other; and the rubber spring has a lower outer peripheral edge portion held in the accommodating portion, and a flexible skirt portion between the upper pressing portion and the pressing portion of the skirt. The fixed contacts are contacted and separated; the lower end outer peripheral edge portion of the rubber spring is formed by an inclined surface or an arc surface that is widened from the lower surface side to the upper surface side, and the outer shell portion of the housing that holds the lower end outer peripheral portion is formed respectively. The opposing surface of the containing wall portion. The second solution is characterized in that the height of the housing wall portion of the outer shell is the same as or higher than the height of the upper side of the outer peripheral edge portion of the lower end of the rubber bomb described in 90736.doc5 1233133. The special feature of the Λ " solution is that the expansion angle of the outer peripheral edge portion of the lower end of the rubber bomb is larger than the expansion angle of the housing wall portion of the shell; The lower end outer peripheral edge portions of the knee springs each have a larger difference in size on the upper side than a difference in size on the lower side. The fourth aspect is characterized in that an air flow path communicating with the inner surface side of the rubber bullet cyan is formed, the air flow path is connected to the lower peripheral edge portion of the rubber elastic, and the lower peripheral edge portion is held. The opposing surfaces of the housing wall portion of the case are connected. A fifth aspect is characterized in that a housing portion held in the housing = 旎 lifting and moving 'while pressing a face on the upper end of the rubber spring and pressing the stem' is formed on the inner wall portion of the housing portion. The core groove guides the guide groove portion through which the air flow path is formed. A sixth aspect is characterized in that the guide groove portion is extended to the bottom surface side of the second shell, and the inner bottom portion of the guide groove portion is formed at a position lower than the contact surface of the fixed contact by one step. The seventh aspect is characterized in that the movable contact is made of a metal plate having elasticity, and is clamped between a lower side of an outer peripheral edge portion of a lower end of the rubber mandrel and an upper side of the fixed contact. A protruding portion is formed on the overlapping surface of the movable contact and the fixed contact, and the inner surface side of the rubber spring is communicated with the guide groove portion by the protruding portion. [Embodiment] 9〇736.doc5 1233133 An example of the & snap switch of the present invention j e-. X is shown in Figs. 1 to 9 below. Fig. 1 is a top view of a snap switch, Fig. 2 is a cross-sectional view taken along line 2_2 of Fig. 1, e VL ^, ^ 疋, and Fig. 3 is a cross-sectional view taken along line 3-3 of Fig. 1, Fig. # ^ ^ ^, 5 is a top view of a rubber bomb, FIG. 6 is a view of a rubber ^ ΛΛ ^ π, FIG. 7 is a top view of a movable contact, and FIG. 8 is a view 7 and &; Μ Α, ~ Sectional view of the moving contact. Fig. 9 is an explanatory diagram showing a further operating characteristic of a rubber bullet. Synthetic resin and other insulating materials
Tt衣成上面開口的矩形的箱 狀°在該外…的成了收容部la，在該收容部㈣ 内底部上設置了由黃銅等導電性金屬材料形成的一對固定 接點2、3’該㈣接點利用鎮嵌成形方法與上述外殼工成形 為一個整體。 並且，在上述外殼1的收容部“的内 槽㈣，料向槽㈣在對角線上的四個角上與:= 柱6的導向突部6c相卡合。通過設置該導向槽部^，在下述 芯柱6升降移動時能夠在上述外殼丨内對該芯柱6進行導向 ’而且進行位置限制。 再者，在上述收容部la的下面側的内壁部上形成了從下 面側向上面側擴開的傾斜面所構成的收容壁部卜。在該收 容壁部相對置地保持著下述橡膠彈簧5的下端外周緣部 5c。並且，上述收容壁部lc的一部分和上述導向槽部1七的 邛勺形成互相連接狀態，再者，相對於上述收容部1 a的 由上述收容壁部lc所包圍的内側的内底面來說，上述導向 槽部1 b的内底部的面被形成在低一個臺階的位置上。 並且，上述外殼1的收容壁部lc的一部分和上述導向槽部 90736.doc5 -10- 1233133 lb的一部分互相連接地被形成，該連接部分構成了與下述 橡膠彈簧5的内面側的空間部相連通的空氣流路。 如此，通過與上述外殼丨的收容壁部lc的一部分相連接， 幵>成上述導向槽部lb’於是形成了與下述橡膠彈簧$的内面 側相連通的空氣流路，所以，在按壓橡膠彈簧5進行翻轉動 作時’即使上述外殼1的收容壁部1 c和橡膠彈簧5的下端外周 緣部5c緊密結合地被保持著，也能使橡膠彈簧$内的空氣向 外部流出，因此，能使橡膠彈簧5切實地進行翻轉和重定。 並且’因為上述導向槽部lb能兼用作空氣流路，所以不 需要重新設置空氣流路，簡化了結構。 一對固定接點2、3被埋設在上述外殼1的内底部，該埋設 部分的中途形成多個彎曲部，其一端側向上述外殼丨的外面 延伸設置’形成端子部2a、3a。並且另一端側露出到上述 外殼1的上述收容部la的由上述收容壁部lc包圍的内側的 内底面上，形成了互相間保持一定間隔並設置成對置狀態 的一對接點部2b、3b。 在此情況下’上述導向槽部1 b延伸形成到上述外殼1的底 面側，該導向槽部lb的内底部形成在比上述固定接點2、3 的接點部2b、3b的面低一個臺階的位置上，所以，即使灰 塵知:入到上述收谷部1 a内’也能使侵入的灰塵積存在上述 導向槽部lb的内底部，所以能防止灰塵侵入到接點部，能 提高接觸的可靠性。 可動接點4由具有彈性的磷青銅板或不銹鋼板等形成，外 形大致上呈圓形，在其外側形成了環狀的邊條部4a。在該 90736.doc5 11 1233133 邊條部4a的内側，設置了圓弧狀的孔仆，在該孔扑的中央 部上形成了接觸片4d ’該接觸片4d的—端通過連接部^而 與上述邊條部4a相連接，另一端整體向上翹起。該接觸片 4d設置成通過上述連接部4〇能在上述邊條部心上擺動，其 按一定角度被彎曲，以便使其前端側稍稍向上傾斜。 亚且，在上述接觸片4d上，在與下述橡膠彈簧5相對置的 面，即被切離並彎曲成傾斜狀的上側的面上，形成了與該 橡膠彈κ 5相搭接的搭接用的突部46。通過設置該突部^使 接觸片4d的大致中央部承受壓力，所以能使接觸穩定。並 在下側的面上形成了與上述固定接點2的接點部“相搭 接的多個突部4f，能得到穩定的接觸。 再者，在上述邊條部4a的下面側形成了在上述固定接點3 側突出來的突起部4g。通過設置該突起部4g，上述可動接 點4被夾持在下述橡膠彈簧5的下面和上述固定接點〕之間 ，在破載置於固定接點3上時，接點部几和上述突起部h 相抵接’其周圍不緊密結合，確保有間隙叫參照圖3)。並 且，依此，上述可動接點4形成總是與上述固定接點3相接 觸並月b與固疋接點2進行接觸和分離，構成開關的接點。 士此通過在上述可動接點4上設置上述突起部&，能使 橡膠彈簧5的内面側的空間部和上述外殼Μ#向槽部帅 連通，所以，橡轉簧5㈣空氣被可靠地從由上述突起部 4g形成的上述可動接點4和固定接點3的間隙h向上述導向槽 部ib内導入，因此能使橡膠彈簧5切實地進行翻轉和重定。 再者，在本實施例中，上述突起部4g形成在上述可動接 90736.doc5 -12- 1233133 ‘=邊:，的下面側，但也可以在上述固定接_上 、./成大起部，以取代該突起部4g。並且，也可以在上 :::弹*5的下表面上設置與上述橡膠彈簧5的内面側的 二間邛相連通的凹槽部，以取代突起部。 在上述可動接點4的上述邊條部4a上設置了向外側突出 、大片σΜ1ι ’上述可動接點4被插入到外殼^的收容部 U内時，通過其與上述導向槽㈣相卡合，來進行位置限 制0 橡膠彈簣5由具有撓性的彈性體或石夕橡膠等形成， 呈下面開口的圓頂狀，盆包括. 八 乂 ，、包括.下述芯柱移動和重定時被 彎曲而為生彈射力的裙部5a、形成在該裙料上端部的按 壓面部5b'以及形成在該裙部5a的下端部的外周緣部5〇。 在該按壓面部5b的下面側，形成動作突部兄，該動作突部 5 d的前端搭接到上述可動接點4的接觸片4 d的上面側所設 置的上述突部4e上。 〇又 並且，上述外周緣部5c的外周面形成從下面側向上面側 擴開的傾斜面。而且，在上述橡膠彈簧5被插入到上述外殼 1的收容部la内時，上述外周緣部兄設置成與上述收容壁部 1 c的傾斜面相對置的狀態。 如此，相對於向上述外殼丨内組裝的方向，上述橡膠彈簧 5的下端外周緣部5c的前端側形成端頭較細的形狀。所以， 能提高插入時的易裝配性，同時能減小插裝後與上述外殼丄 的收容壁部lc的間隙。 並且，在此情況下，上述外殼1的收容壁部lc的高度尺寸 90736.doc5 13 1233133 與上述橡膠彈簧5的外周緣部5c的上面側的高度尺寸相比 ’兩者尺寸相同，或者前者的尺寸稍大於後者的尺寸。依 此，s按壓上述橡膠彈簧5使其進行翻轉動作時，壓縮後膨 脹的上述橡膠彈黃5的下端外周緣部5 c的上面側，不會從上 述收容壁部lc突出來，所以，按壓時能防止上述橡膠彈簧5 從上述收容壁部丨c浮起。 並且，上述外殼1的收容壁部1 c和上述橡膠彈簧5的外周 緣邛5 c互相對置的傾斜面的相互關係是，上述橡膠彈簧$的 外周緣部5c的擴展角度大於上述外殼1的收容壁部lc的擴 展角度，上述外殼1的收容壁部lc和上述橡膠彈簧5的外周 緣部5c的下面一側的尺寸差大於上面一側的尺寸差。 依此，在上述橡膠彈簧5插入到上述收容壁部k内時上述 橡勝彈κ 5谷易組裝，能被安放在上述收容壁部丨〇内的適當 位置上，所以能減小上述橡膠彈簧5的組裝位置（高度尺寸） 的為差。並且，在上述橡膠彈簧5的下面一側，能把上述可 動接點4的邊條部4a牢靠地按壓到上述固定接點3 一側。 而且，在本實施例中，上述可動接點4由具有彈性的金屬 反製成匕被夾持在上述固定接點3和上述橡膠彈簧5之間 。但也可以在上述橡膠彈簧5的動作突部兄的下端面上一體 形成已公知的碳墨接點等。在此情況下，不需要上述可動 接點4 ’能減少零件數量。 〜桎6由合成樹脂等成型材料形成為大致圓形，其上面設 置了用手指等操作的平面狀的按壓部以。與該按壓部以相 對置的下面側上形成了搭接到上述橡膠彈簧$的按壓面部 90736.doc5 -14· 1233133 5b上面、使上述橡膠彈簧5向上述可動接點4側彎曲的、向 下面側突出的按壓突部6b。 並且，在上述芯柱6的側面部的下面側上，形成了向十字 方向突出的4個導向突部6e。並且，當上述芯柱峨插入到 上述外殼1的收容部13的開口部上時’上述導向突部^與上 述收容部la的内壁部上所形成的上述導向槽部化相卡合，由 上述外殼1對其位置進行限制’安裝成能升降移動的狀態。 以下說明上述結構的壓扣開關的動作。 首先，當用手指等按壓上述芯柱6的按壓部以時，上述按 壓突部6b對上述橡膠彈簧5的按壓面部％進行㈣，使裙部 5a撓曲，如此使動作突部5d向下方移動。 並且’如圖9的實線所示，當按預定行程進行移動，使作 動力的負荷達到峰值位置時，上述㈣城行翻轉動作， 上述動作突部5d自行向下方移動。並且，上述動作突部兄 ，接到上述可動接點4的接觸片4(1的上面側的突部^上，於 是上述可動接點4的接觸片4d的下面側的突部付與上述固 定接點2相導通，接點形成導通狀態。 若由此狀態，解除對上述芯柱6的按壓，則上述芯柱6 利用上述橡㈣簧5的裙仙所具有_射力㈣上方心 力，返回到初始位置上。此時，上述可動接點4的接觸片4 也利用其本身的彈性而返回到上方，接點變成斷開狀能。 在此情況下，上述橡膠彈冑5的下端外周緣部5c'以及紫 該下端外麟部5e進行支援的上料心㈣ ^ 對置面，分別形成從下面側向上面側擴開的傾斜面，相詞 90736.doc5 -15- 1233133 於向上述外殼i内裝人的方向，上述橡膠彈簧5的下端外周 緣。(5 5 c的刖端側形成端頭較細的形狀。 因此’組裝日寺，能減小上述橡膠彈簧5的下端外周緣部化 和上述外殼丨的收容壁部lc的間隙，按壓上述橡膠彈箬5進 行翻轉動作時，能消除上述橡膠彈簧5的外周緣部5c膨服到 與上述外殼丨的收容壁部lc相搭接為止的間隙（間隙量）。所 以如圖9的實線所不，作動力的峰值位置p點（裙部^挽曲 翻轉的點），能設定到適當位置上，離開接點導通位置找 較遠，使翻轉後的到導通之前的行程增長，所以，能獲得 操作時的良好操作感。 此時，裝入時上述橡膠彈簧5的下端外周緣部氕和上述外 殼1的收容壁部此間有一定間隙Ge在此情況下，由於加 上在間隙G内㈣時上述橡膠彈f5的下料周緣部5c膨服 到與上述收容壁部1C相搭接之前的移動量，所以，如圖9的 虛線所7F，作動力的峰值位置收（裙部&挽曲翻轉的點）向 後面（接點導通位置R側）偏移，所β，翻轉後的到導通前的 行程減短，不能得到操作時的良好的操作感。 圖10是表示本發明第2實施例的壓扣開關結構的剖視圖 。在此情況下，與第1實施例的不同點是，上述外殼丨的收 容壁部！〇和上述橡膠彈簧5的下端外周緣部允的構成有些 不同。 作為本發明第2實施例的壓扣開關的構成，上述橡膠彈簧 5的下端外周緣部5c、以及對該下端外周緣部九進行支援的 上述外殼1的收容壁部卜的對置面，分別形成從下面側向上 90736.doc5 4 1233133 面側擴開的圓弧面。 在此情況下，也是上述橡膠彈簧5的下端外周緣部5c、以 及對該下端外周緣部5c進行支援的外殼1的收容壁部lc的 對置面’分別形成從下面側向上面側擴展開的圓弧面，相 對於向上述外殼1内裝入的方向，上述橡膠彈簧5的下端外 周緣部5c的前端側形成端頭較細的形狀。 因此，和上述第1實施例一樣，組裝時，能減小上述橡膠 彈簧5的下端外周緣部丸和上述外殼丨的收容壁部“的間隙 ，按壓上述橡膠彈簧5進行翻轉動作時，能消除上述橡膠彈 簧5的外周緣部5c膨脹到上述外殼丨的收容壁部丨^相搭接為 止的間隙（間隙量）。所示，如圖9所示，作動力的峰值位置 P點（裙部5a撓曲翻轉的點），能設定到適當位置上，離開接 點導通位置較遠，使翻轉後的到導通為止的行程增長，所 以，能獲得操作時的良好操作感。Tt is formed into a rectangular box shape with an opening on the outside. The outer portion becomes a receiving portion la. A pair of fixed contacts 2, 3 made of a conductive metal material such as brass is provided on the inner bottom of the receiving portion ㈣. 'The joint is integrally formed with the above-mentioned shell by using a ballast forming method. In addition, in the inner groove “of the accommodating portion of the housing 1 above, the groove 向 engages at the four corners of the diagonal line with the guide protrusions 6c of the = 6 column. By providing the guide groove ^, When the stem 6 described below is moved up and down, the stem 6 can be guided within the housing 丨 and its position can be restricted. In addition, the inner wall portion of the lower side of the receiving portion 1a is formed from the lower side to the upper side. A receiving wall portion formed by an expanded inclined surface. The lower wall outer peripheral edge portion 5c of the rubber spring 5 described below is held opposite to the receiving wall portion. A part of the receiving wall portion lc and the guide groove portion 17 The spoons are connected to each other, and the inner bottom surface of the guide groove portion 1 b is formed at a lower level than the inner bottom surface of the inner portion surrounded by the receiving wall portion lc of the receiving portion 1 a. One step position. Furthermore, a part of the housing wall portion lc of the housing 1 and a portion of the guide groove portion 90736.doc5 -10- 1233133 lb are formed to be connected to each other, and the connecting portion constitutes a rubber spring 5 described below. Empty on the inner side In this way, by being connected to a part of the housing wall portion lc of the housing 丨, the guide groove portion lb 'is formed so as to communicate with the inner surface side of the rubber spring $ described below. The air flow path, therefore, when the rubber spring 5 is pressed to perform the reversing operation, 'even if the housing wall portion 1 c of the case 1 and the lower end outer peripheral edge portion 5 c of the rubber spring 5 are tightly held, the rubber spring can be held inside. The air flows out to the outside, so that the rubber spring 5 can be reliably reversed and reset. Also, because the above-mentioned guide groove portion lb can also serve as an air flow path, there is no need to re-install the air flow path, simplifying the structure. The fixed contacts 2 and 3 are embedded in the inner bottom of the above-mentioned housing 1. A plurality of bent portions are formed in the middle of the embedded portion, and one end side is extended to the outside of the above-mentioned housing 丨 to form the terminal portions 2a and 3a. The inner bottom surface of the inside of the housing portion 1a of the housing 1 surrounded by the housing wall portion lc is formed in a manner to maintain a certain distance from each other and to be opposed to each other. Butt contact portions 2b, 3b. In this case, the above-mentioned guide groove portion 1b is extended to the bottom surface side of the housing 1, and the inner bottom portion of the guide groove portion lb is formed at a contact portion that is more than the fixed contacts 2, 3 The surfaces of 2b and 3b are lowered by one step. Therefore, even if the dust is known, the intruded dust can accumulate in the inner bottom of the guide groove portion 1b even if it enters into the valley portion 1a, so it can prevent the intrusion of dust. The contact point can improve the reliability of the contact. The movable contact 4 is formed of a phosphor bronze plate or a stainless steel plate having elasticity, and has a substantially circular shape, and a ring-shaped edge portion 4a is formed on the outer side. The 90736.doc5 11 1233133 is provided with an arc-shaped hole inside the side strip portion 4a, and a contact piece 4d is formed on the central portion of the hole flap. The end of the contact piece 4d is connected to the above through a connecting portion ^. The side strip portions 4a are connected, and the other ends are raised upward as a whole. The contact piece 4d is provided to be able to swing on the center of the side strip portion through the connection portion 40, and is bent at a certain angle so that the front end side thereof is slightly inclined upward. Moreover, on the contact piece 4d, a surface overlapping with the rubber bullet κ 5 is formed on a surface opposite to the rubber spring 5 described below, that is, a surface that is cut away and bent into an inclined upper side.接 用 突 部 46。 46 received projections. By providing the protrusion ^, the substantially central portion of the contact piece 4d is subjected to pressure, so that the contact can be stabilized. A plurality of projections 4f overlapping with the contact portion "of the fixed contact 2" are formed on the lower surface, and stable contact can be obtained. Furthermore, a lower surface of the side strip portion 4a is formed at A protruding portion 4g protruding from the fixed contact 3 side. By providing the protruding portion 4g, the movable contact 4 is sandwiched between the lower surface of the rubber spring 5 described below and the fixed contact], and is fixed in a broken state. When the contact 3 is on, the contact part is in contact with the protrusion h, and its surroundings are not tightly connected, and a gap is ensured (refer to FIG. 3). In addition, the movable contact 4 is always fixedly connected to the fixed contact. The contact point 3 is in contact with the fixed contact point 2 and separated to form a contact point of the switch. By providing the protrusion & on the movable contact point 4, the inner side of the rubber spring 5 can be made. The space portion communicates with the housing M # toward the groove portion. Therefore, the air of the rubber spring 5㈣ is reliably moved from the gap h between the movable contact 4 and the fixed contact 3 formed by the protrusion 4g to the guide groove portion ib. Internally introduced, so that the rubber spring 5 can be reliably reversed and Furthermore, in this embodiment, the protruding portion 4g is formed on the lower side of the movable joint 90736.doc5 -12-1233133 '= side :, but it may be on the fixed joint _, ./ 成大A raised portion is used to replace the protruding portion 4g. In addition, a recessed portion communicating with the two gaps on the inner surface side of the rubber spring 5 may be provided on the lower surface of the upper ::: spring * 5 to replace the protruding portion. A large piece σM1 is provided on the side strip portion 4a of the movable contact 4 to protrude outward. When the movable contact 4 is inserted into the receiving portion U of the housing ^, the movable contact 4 is engaged with the guide groove 通过. To limit the position 0 The rubber bounce 5 is formed of a flexible elastomer or stone rubber, and it has a dome shape with an opening below. The basin includes. Hachiman, including. The following stem movement and retiming are A skirt portion 5a that is bent to generate a spring force, a pressing surface portion 5b 'formed on the upper end portion of the skirt material, and an outer peripheral edge portion 50 formed on the lower end portion of the skirt portion 5a. On the lower side of the pressing surface portion 5b, Brother of the action protrusion, the front end of the action protrusion 5 d is overlapped with the movable contact 4 The protruding portion 4e is provided on the upper surface side of the contact piece 4d. The outer peripheral surface of the outer peripheral edge portion 5c forms an inclined surface that extends from the lower surface side to the upper surface side. The rubber spring 5 is inserted When entering the housing portion 1a of the housing 1, the outer peripheral edge member is disposed in a state facing the inclined surface of the housing wall portion 1c. In this way, the rubber spring 5 is opposed to the direction in which the housing 1 is assembled inside the housing. The lower end outer peripheral edge portion 5c has a thinner tip at the front end side. Therefore, it is possible to improve the ease of assembly during insertion, and at the same time reduce the gap with the receiving wall portion lc of the housing 丄 after insertion. In this case, the height dimension of the housing wall portion 1c of the housing 1 is 90736.doc5 13 1233133, which is the same as the height dimension of the upper side of the outer peripheral edge portion 5c of the rubber spring 5. The size of the two is the same, or the size of the former is slightly larger. The latter size. Accordingly, when the rubber spring 5 is pressed to perform the turning operation, the upper side of the lower end outer peripheral edge portion 5 c of the rubber elastic yellow 5 that expands after compression does not protrude from the storage wall portion lc, so press In this case, the rubber spring 5 can be prevented from floating from the storage wall portion 丨 c. In addition, the relationship between the accommodating wall portion 1 c of the housing 1 and the inclined surfaces of the outer peripheral edge 邛 5 c of the rubber spring 5 facing each other is that the expansion angle of the outer peripheral edge portion 5 c of the rubber spring $ is larger than that of the housing 1. The expansion angle of the storage wall portion lc is such that the difference in size between the storage wall portion lc of the housing 1 and the outer peripheral edge portion 5c of the rubber spring 5 is larger than the size difference on the upper side. According to this, when the rubber spring 5 is inserted into the receiving wall portion k, the rubber bullet κ 5 valley is easy to assemble and can be placed in an appropriate position in the receiving wall portion, so the rubber spring can be reduced. The assembly position (height dimension) of 5 is poor. In addition, on the lower side of the rubber spring 5, the edge portion 4a of the movable contact 4 can be firmly pressed against the fixed contact 3 side. Furthermore, in this embodiment, the movable contact 4 is made of a metal having elasticity and is sandwiched between the fixed contact 3 and the rubber spring 5. However, a well-known carbon ink contact or the like may be integrally formed on the lower end surface of the operating projection of the rubber spring 5. In this case, the above-mentioned movable contact 4 'is not required, and the number of parts can be reduced. ~ 6 is formed into a substantially circular shape from a molding material such as a synthetic resin, and a flat pressing part is provided on the upper surface for manipulation with a finger or the like. A lower surface side opposite to the pressing portion is formed on the upper surface of the pressing surface 90736.doc5 -14 · 1233133 5b which overlaps the rubber spring $, and the rubber spring 5 is bent toward the movable contact 4 side and downward. The side protruding pressing protrusion 6b. In addition, on the lower surface side of the side surface portion of the stem 6, four guide protrusions 6e are formed to protrude in the cross direction. In addition, when the stem is inserted into the opening portion of the accommodating portion 13 of the casing 1, the guide protrusion ^ is engaged with the guide groove portion formed on the inner wall portion of the accommodating portion 1a. The housing 1 restricts its position, and is mounted so that it can move up and down. The operation of the snap switch with the above structure will be described below. First, when the pressing portion of the stem 6 is pressed with a finger or the like, the pressing projection 6b compresses the pressing surface portion of the rubber spring 5 to deflect the skirt portion 5a, so that the operation projection 5d moves downward. . Further, as shown by the solid line in FIG. 9, when the movement is performed according to a predetermined stroke so that the load of the driving force reaches the peak position, the above-mentioned ㈣ 城 行 reverses the movement, and the movement protrusion 5d moves downward by itself. In addition, the above-mentioned moving protrusion is connected to the contact piece 4 (1 on the upper side of the movable contact 4), and the protrusion on the lower side of the contact piece 4d of the movable contact 4 is fixed to the above. The contacts 2 are in conduction, and the contacts are in a conducting state. If the pressing of the stem 6 is released in this state, the stem 6 uses the upper heart force of the skirt of the rubber spring 5 to return To the initial position. At this time, the contact piece 4 of the movable contact 4 also returns to the upper side by using its own elasticity, and the contact becomes a disconnected energy. In this case, the outer periphery of the lower end of the rubber bounce 5上 5c ′ and 上 ㈣ 心 麟 supporting the lower outer outer part 5e ^ Opposite surfaces form inclined surfaces that extend from the lower side to the upper side respectively, with the words 90736.doc5 -15-1233133 to the outer shell In the direction of the person, the outer peripheral edge of the lower end of the rubber spring 5 is formed. (5 5 c The side of the crotch end is formed into a thinner shape. Therefore, 'Assembling Nichiji' can reduce the outer peripheral portion of the lower end of the rubber spring 5. The gap between the housing wall lc of the housing 丨 and the rubber When the flipper 5 is turned over, the gap (gap amount) between the outer peripheral edge portion 5c of the rubber spring 5 and the overlapping with the receiving wall portion lc of the casing 丨 can be eliminated. Therefore, as shown by the solid line in FIG. 9 No, the peak position p of the driving force (the point where the skirt ^ bends overturns) can be set to an appropriate position, and the distance from the conduction position of the contact can be set a long distance, so that the stroke after the reversal to the conduction is increased, so A good feel during operation is obtained. At this time, there is a certain gap Ge between the outer peripheral edge portion 氕 of the lower end of the rubber spring 5 and the receiving wall portion of the housing 1 in this case. At this time, the cutting edge portion 5c of the rubber bullet f5 swells to the amount of movement before overlapping with the receiving wall portion 1C. Therefore, as shown by the dashed line 7F in FIG. 9, the peak position of the power is closed (the skirt & The point where the curve is reversed) is shifted to the rear (the contact conduction position R side), so β, the stroke after the inversion to the conduction is shortened, and a good operating feeling during operation cannot be obtained. FIG. 10 shows the second aspect of the present invention. Sectional view of the buckle switch structure of the embodiment In this case, the difference from the first embodiment is that the receiving wall portion of the casing 丨 is slightly different from the outer peripheral edge portion of the lower end of the rubber spring 5. The pressure of the second embodiment of the present invention is slightly different. The configuration of the snap switch, the opposing surfaces of the lower outer peripheral edge portion 5c of the rubber spring 5 and the receiving wall portion of the housing 1 supporting the lower outer peripheral edge portion 9 are formed from the lower side to the upper side 90736.doc5 4 1233133 An arcuate surface widening on the surface side. In this case, it is also the opposing surface of the lower end outer peripheral edge portion 5c of the rubber spring 5 and the housing wall portion lc of the housing 1 supporting the lower end outer peripheral edge portion 5c. Each of the arcuate surfaces extending from the lower surface side to the upper surface side is formed, and the tip end side of the lower end outer peripheral edge portion 5c of the rubber spring 5 is formed into a thinner shape with respect to the direction in which the casing 1 is inserted. Therefore, as in the first embodiment, the gap between the outer peripheral edge of the lower end of the rubber spring 5 and the receiving wall portion of the housing 丨 can be reduced during assembly. When the rubber spring 5 is pressed to perform the turning operation, the above can be eliminated. The outer peripheral edge portion 5c of the rubber spring 5 expands to the clearance (gap amount) until the accommodating wall portion of the outer case 丨 overlaps. As shown in FIG. 9, the peak position P of the driving force (the skirt portion 5a) The point of flexing and turning) can be set to an appropriate position, which is far away from the conducting position of the contact, which increases the stroke from turning to turning on after turning, so that a good operating feeling during operation can be obtained.
<而且在本發明的實施例中，利用上述外殼1的導向槽W 來形成將上述橡膠彈菁5的内面側的空間部的空氣向外部 排放用的空氣流路，但也可以在上述橡膠彈簧5的一部分上 形成流通用的孔和槽。 發明的效果 如以上說明的那樣，本發明的壓扣開關具有：外殼，其 具有收谷部’♦固定接點，其被固定安裝在上述收容部内； 可動接點，其被設置在與該固定接點相對置的位置上； 及橡膠彈簧，其 人 η 外周緣部被保持在上述收容部内，在 其與上端按壓面邬 ^ 間具有能夠彎曲的裙部，利用該裙部 90736.doc5 •17- I233l33 的臂曲來使上述可動接點與上述固^接點進行接觸和分離 ’橡膠彈簧的下端外周緣部、以及對該下端外周緣部進行 保持的外殼的收容壁部的對置面，分別被形成為從下面側 ，士面側擴開的傾斜面或圓弧面。所以’相對於向外殼内 山衣的方向’ 述橡膠彈簧的下端外周緣部的前端側形成 端頭較細的形狀。戶斤以，能提高易裝配性，同時能減小與 士述外殼的收容壁部的間隙。因此，按壓上述橡膠彈簧進 仃翻轉動作時’作動力的峰值位置（橡膠彈菁挽曲翻轉的 點）’能言史定到離開接點導通位置較《，使翻轉後的到導通 為止的行程增長，所以，能獲得良好的操作感。 並且，外殼的收容壁部的高度尺寸，與橡膠彈箬的下端 :卜周緣部的上面側的高度尺彻，兩者尺寸相同，或者 引者的尺寸稍大於後者的尺寸。所以，當按壓㈣彈菁使 其進行翻轉動作時，壓縮後膨脹的上述橡膠彈簧的下端外 周緣部的上面側，不會從±述收容壁部突出來，所以，能 防止橡膠彈簧向上浮起。 卜與外设的收谷壁部的擴展角度相比，橡膠彈簧的 端卜周、緣^的擴展角度較大；肖上述外殼的收容壁部和 述橡膠彈貫的下端外周緣部各自的上面側的尺寸差相比 片下面側的尺寸差較大。通過如此形成，橡膠彈簧容易組 凌便於被女放在收容壁部内的適當位置上，所以能減小 上述橡膠彈簧的組裝位置(高度尺寸)的誤差，能把上述可動 接”’έ的邊條部牛罪地按壓到上述固定接點一側。 Ν / _ ) 、，，形成了空氣流路，該空氣流路與橡膠彈簧的下端 90736.doc5 -18- 1233133 :周緣部、和對該下端外周緣部進行保持的外殼的收容壁 部的對置面相連接並與上述橡膠彈簧的内面側相連通 以，當按麼橡勝彈簧進行翻轉動作時，即使外殼的收容辟 部和橡膠彈簣的下端外周緣部緊密結合，也能使橡踢彈菁 内的空氣排放到外部，因此能使橡膠彈簧切實地進行翻轉 和重定。 再者，具有被保持在外殼收容部内並能升降移動 對上述橡㈣簧的上端按慶面部進行㈣的芯柱，在收容 部的内壁部上形成了對芯柱的升降進行導向的導向槽部，由 =導向槽部形成了空氣流路。所以能把導向槽部兼用作空氣 流路，因此’不需要重新設置空氣流路，能簡化結構。 並且’導向槽部延伸到外殼底面側’把上述導向槽部的 内底部形成在比固定接點的接點面低_個臺階的位置上。 2以，侵入的灰塵被積存在該導向槽部的内底部，因此， 能防止灰塵侵入到接點部，能提高接觸的可靠性。 再者，可動接點由具有彈性的金屬板製成，它被夾持在 橡膠彈育的下端外周緣部的下面側和固定接點的上面側， 在可動接點和固定接點的搭接面上形成突起部，利用該突 起部使橡膠彈簧的内面側與導向槽部進行連通。所以，橡 膠彈更内的空氣能順利地從由突起部所形成的可動接點和 固疋接點的間隙中被引導到導向槽部中，因此能使橡膠彈 簧切實地進行翻轉和重定。 【圖式簡單說明】 疋表示本發明第1貫施例的壓扣開關的俯視圖。 90736.doc5 -19- 1233133 圖2是本發明的圖1的2-2線處的剖視圖。 圖3是本發明的圖1的3-3線處的剖視圖。 圖4是表示本發明一實施例的外殼的俯視圖。 圖5是表示本發明一實施例的橡膠彈簧的俯視圖。 圖6是表示本發明一實施例的橡膠彈簧的剖視圖。 圖7是表示本發明一實施例的可動接點的俯視圖。 圖8是表示本發明一實施例的可動接點的剖視圖。 圖9是表示本發明的橡膠彈菁的作動力特性的說明圖 圖H)是表示本發明第2實施例的麼扣開關的剖視圖。 圖Π是表示現有的壓扣開關的俯視圖。 圖12是表示現有的壓扣開關的剖視圖。 【圖式代表符號說明】 1 外殼 la 收容部 lb 導向槽部 1 c 收容壁部 2，3 固定接點 2a，3a 端子部 2b，3b 接點部 4 可動接點 4a 邊條部 4b 4c 連接部 4d 接觸片 90736.doc5 1233133 4e，4f 突部 4g 突起部 4h 突片部 5 橡膠彈簧 5a 裙部 5b 按壓面部 5c 外周緣部 5d 動作突部 6 芯柱 6a 按壓部 6b 按壓突部 6c 導向突部 G，H 間隙 90736.doc5< In the embodiment of the present invention, the guide groove W of the casing 1 is used to form an air flow path for exhausting the air in the space portion on the inner surface side of the rubber elastic cyan 5 to the outside. Holes and grooves are formed in a part of the spring 5. ADVANTAGE OF THE INVENTION As explained above, the snap switch of this invention is provided with the housing which has a trough part ', a fixed contact which is fixedly installed in the said receiving part, and a movable contact which is provided with this fixed And the contact point is opposite to each other; and the rubber spring, whose outer peripheral edge portion is held in the above-mentioned receiving portion, and has a bendable skirt portion between the upper end pressing surface 利用 ^ and the skirt portion 90736.doc5 • 17 -The arm curve of I233l33 to contact and separate the movable contact point from the fixed contact point, the opposite surface of the lower end outer peripheral edge portion of the rubber spring, and the housing wall portion of the housing holding the lower outer peripheral edge portion, Each of them is formed as an inclined surface or a circular arc surface that spreads from the lower surface side and the taxi surface side. Therefore, the tip end side of the outer peripheral edge portion of the lower end of the rubber spring is formed in a shape relatively thinner with respect to the direction toward the inner garment of the casing. Households can improve the ease of assembly, and at the same time, reduce the gap with the housing wall of the housing. Therefore, when the above-mentioned rubber spring is pressed to perform the inversion operation, the “peak position of the power (the point where the rubber elastic is turned over)” can be determined to be farther away from the contact conduction position than the contact, and the stroke after the inversion is turned on until the conduction It grows, so a good operation feeling can be obtained. In addition, the height dimension of the housing wall portion of the casing is the same as the height of the upper side of the lower edge of the rubber shell: the peripheral edge portion is the same size, or the size of the attractor is slightly larger than the latter. Therefore, when the shotgun is pressed to perform the flipping action, the upper side of the outer peripheral edge portion of the lower end of the rubber spring that expands after compression does not protrude from the receiving wall portion, so the rubber spring can be prevented from floating upward. . Compared with the expansion angle of the trough wall portion of the peripheral device, the expansion angle of the end spring and the edge of the rubber spring is larger; The size difference on the side is larger than the size difference on the lower side of the sheet. By being formed in this way, the rubber spring can be easily assembled and placed on a suitable position in the housing wall by the female. Therefore, the error of the assembly position (height dimension) of the rubber spring can be reduced, and the movable edge can be connected. The upper part is pressed to the side of the fixed contact. Ν / _), forms an air flow path, and the air flow path and the lower end of the rubber spring 90736.doc5 -18-1233133: the peripheral part, and the lower end The opposing surface of the housing wall portion of the housing held by the outer peripheral edge portion is connected and communicates with the inner surface side of the rubber spring. When the rubber spring is reversed, even if the housing opening portion of the housing and the rubber spring The lower outer periphery is tightly coupled, so that the air in the rubber kick can be discharged to the outside, so the rubber spring can be reliably reversed and reset. Furthermore, the rubber spring is held in the housing receiving portion and can be moved up and down to the rubber. The upper end of the cymbal spring is slapped according to the face, and a guide groove portion is formed on the inner wall portion of the accommodating portion to guide the rise and fall of the stem, and an air flow is formed by the = guide groove portion. . Therefore, the guide groove portion can also be used as an air flow path. Therefore, it is not necessary to re-install the air flow channel, and the structure can be simplified. Furthermore, the "guide groove portion extends to the bottom side of the casing" and the inner bottom portion of the guide groove portion is formed to be fixed. The contact surface of the contact is lowered by a step. 2. Intruded dust is accumulated in the inner bottom portion of the guide groove portion. Therefore, it is possible to prevent dust from entering the contact portion and improve contact reliability. Alternatively, the movable contact is made of a metal plate having elasticity, and it is clamped between the lower side of the outer peripheral edge portion of the lower end of the rubber ball and the upper side of the fixed contact. At the overlapping surface of the movable contact and the fixed contact A protruding portion is formed on the inner side of the rubber spring and the guide groove portion is communicated by the protruding portion. Therefore, the air inside the rubber bullet can smoothly pass from the gap between the movable contact and the fixed contact formed by the protruding portion. The guide is guided into the guide groove portion, so that the rubber spring can be reliably turned and reset. [Brief description of the drawing] 疋 A plan view showing a snap switch of the first embodiment of the present invention. 90736.doc5 -19- 12 33133 Fig. 2 is a cross-sectional view taken along line 2-2 of Fig. 1 according to the present invention. Fig. 3 is a cross-sectional view taken along line 3-3 of Fig. 1 according to the present invention. Fig. 4 is a plan view showing a housing according to an embodiment of the present invention. 5 is a plan view showing a rubber spring according to an embodiment of the present invention. FIG. 6 is a cross-sectional view showing a rubber spring according to an embodiment of the present invention. FIG. 7 is a plan view showing a movable contact according to an embodiment of the present invention. A cross-sectional view of a movable contact according to an embodiment of the present invention. Fig. 9 is an explanatory diagram showing the operating characteristics of the rubber bullet cyan of the present invention. Fig. H) is a cross-sectional view of a snap switch of a second embodiment of the present invention. A plan view of a conventional snap switch. Fig. 12 is a cross-sectional view of a conventional snap switch. [Illustration of Representative Symbols] 1 housing la receiving portion lb guide groove portion 1 c receiving wall portion 2, 3 fixed contact points 2a, 3a Terminal part 2b, 3b Contact part 4 Movable contact 4a Edge part 4b 4c Connection part 4d Contact piece 90736.doc5 1233133 4e, 4f Projection 4g Projection 4h Projection part 5 Rubber spring 5a Skirt 5b Pressing part 5c Outer periphery 5d Acting projection 6 Mandrel 6a Pressing portion 6b Pressing projection 6c Guiding projection G, H Clearance 90736.doc5