M261387 捌、新型說明： 【新型所屬之技術領域】 本創作係關於一種胎壓警示器，特別係關於一種組裝 簡便、無短路之虞之胎壓警示器。 【先前技術】 按’對於不同的車輛種類，其輪胎必須具備相對應之 正常壓力，若輪胎壓力過低，則會明顯地影響其行車安全； 另外’因輪胎之高速旋轉，以及輪胎氣嘴之氣密性問題， 在使用曰久時，其輪胎内部空氣亦有逐漸向外洩漏之情 況’而會造成輪胎壓力過低之狀況，以致影響行車安全。 因此’相關業者乃對此而研發許多胎壓顯示裝置，當胎壓 不足時，可立即予以警告顯示。 公告編號第186905號「胎壓警示器改良構造」，包括 有一外殼體’内部裝設有承壓薄膜；一推桿，位於該承壓 薄膜上方；一壓縮彈簧，提供該推桿回復力；以及一警示 裝置，包括有一第一開關彼為一常閉開關，設於該推桿上 方；一第二開關彼為一常開開關，設於該第一開關上方， 且與該第一開關連接；一發射器線路，位於該推桿與該第 :開關間，且與該第一 H關連接；及—接收器線路， 設於使用者駕駛時能明顯看得見之部位。輪胎在不同之壓 力下可分別觸通該等第一及或第二開關並發射訊號，而由 接收器顯示各該輪胎之壓力狀態。 公告編號第529559號「薄膜式胎壓計」，具有一殼體、 M261387 一可撓性伸縮薄膜、一推桿、一内套管與一彈簧；該可撓 性伸縮薄膜置於該殼體之容置室；該推桿結合於該可撓性 伸縮薄膜’可隨該可撓性伸縮薄膜之伸縮行程而動作；該 内套管置於該殼體之容置室。該薄膜式胎壓計係固設安裝 於一輪胎之氣嘴，以顯示出輪胎之壓力。 公告編號第574977號「輪胎壓力警示裝置」，包括一 連接體上螺裝一套帽，該連接體由具導電性材質之連接座 及非導電性材質之套座一體成型結合而成，該套帽螺設於 該套座上，該連接體與該套帽間所組圍之内部空間中，設 有發射裝置與電源供應裝置，該發射裝置與該電源供應裝 置間設有傳導件；一壓力開關，包括一第一接點及一受膜 片作用並構成第一接點之活動座；一調整件，其與該活動 座間設有彈性元件；一連接第一接點至發射裝置之第一線 路；一連接第二接點至發射裝置之第二組線路；該連接座 包括具有操作孔之隔座所分隔的接頭部份及與該接頭形成 一體之導線體部份；該套座包括在成型時包覆該接頭外周 緣的帷部，及包覆該導線體之座體；該座體在導線體另一 側之内部形成一微調空間和一滑移空間，該座體在微調空 間設有可供該調整件螺設之内螺紋；該座體在滑移空間設 有可供該活動座上下滑移之圓周面。該滑動座可依輪胎壓 力之正常與否而上下滑移，以供與連接座接觸與否，進而 控制其導電線路是否相通，而警杀其輪胎壓力是否不足。 另按，車輛輪胎一般係帶負電，而上述諸前案，其與 該輪胎氣嘴相接之殼體（或座體）一般皆係接至電池裝置2 M261387 正極而帶正電，該正電殼體與負電輪胎不慎拍接日夺 ^ 造成導電線路上之短路，而會造成其發射裝置 9 “、、法動作 或誤動作，影響其壓力警示功能。 又’上述該公告編號第574977號案，其構造雖稱巧省 惟其構造仍屬複雜，組裝麻煩不便。 θ ’ 【新型内容】 基於為克服上述習知胎壓警示裝置之之缺 1心（缺點而創作出 本創作，其目的乃係提供一種胎壓警示器，簡化其構件 並避免導電線路短路。 為達成上述目的，本創作胎壓警示裝置，至少包括有· 一金屬殼體，其内部形成有一橫隔座，其近頂置設有 内凸肩部；-閥嘴裝置，裝設於該金屬殼體之下部；：膜 片，裝設於該橫隔座之頂面；一套筒，裝設於該上部容室 並位於該膜片之上方，該套筒頂部設有一通孔；_推桿， 裝設於該套筒内部，該推桿之底部觸抵於該膜片，該=桿 之頂部穿經該套筒之通孔，且該推桿之近底部形成有一^ 向凸υ性元件’裝麟該推桿之凸環及該套筒之頂 部之間，並套覆㈣推桿之外周；—金屬㈣板，裝設於 «桿之頂部，且跨置於該金屬殼體之内凸肩冑，在該輪 胎壓力正常時，該金屬接觸板係受該輪胎壓力向上推動而 與該内凸肩部相分離，當輪胎壓力不足時，則該金屬接觸 板係向下而與該内凸肩部相接觸；一電池裝置，裝設於該 接觸板之頂面，且該電池裝置係以其負極與該金屬接觸板 M261387 相接觸；一傳導元件，裝設於該電池裝置之正極；一發射 裝置，裝设於该傳導元件及該金屬殼體之頂部；以及一蓋 體，裝設於該金屬殼體之外周。上述諸構件，其組裝簡易， 且位於外部之金屬殼體係金屬接觸板接至電池裝置之負極 而帶負電，與輪胎所帶之負電係屬相同之極性，因此，該 金屬殼體與輪胎相接觸時，亦不會造成短路現象，也不會 產生誤動作。 【實施方式】 以下參照圖式詳細說明本創作。其中，第丨圖係為本 創作胎壓警示器之外觀立體圖，第2圖為本創作胎壓警示 器之分解圖，第3圖為本創作胎壓警示器於胎壓正常時之 剖面圖，第4圖為本創作胎壓警示器於胎壓不足時之剖面 圖。 如該等圖式所示，本創作胎壓警示器包括有··一金屬 殼體1、一閥嘴裝置2、一膜片3、一套筒4、一推桿5、一 彈性元件6、一電池裝置7、一發射裝置8、以及一蓋體9。 上述該金屬殼體丨之内部形成有一橫隔座u，該橫隔 座11將該金屬殼體内部界隔為上部容室12及下部容室 13。該橫隔座11設有中心孔14，且該金屬殼體丨於該上部 容室12之近頂部位置設有内凸肩部1 5。 上述該閥嘴裝置·2係裝設於金屬殼體1之下部容室 13。該閥嘴裝置2包括一閥嘴21及一套環22,該套環係套 覆於該閥嘴21之外周，且該閥嘴21之頂部係突容於金屬 M261387 殼體1橫隔座11之中心孔14。該金屬殼體1於下部容室 13之内壁設有内螺紋16，可螺裝於輪胎之氣嘴（未圖示）， 並可以該閥嘴裝置2頂開該氣嘴，使得該輪胎内部之空氣 經由該閥嘴裝置2導入於金屬殼體1之上部容室I?。M261387 新型 Description of the new type: [Technical field to which the new type belongs] This creation relates to a tire pressure warning device, and more particularly to a tire pressure warning device with simple assembly and no risk of short circuit. [Previous technology] According to 'for different vehicle types, tires must have corresponding normal pressure. If the tire pressure is too low, it will significantly affect its driving safety; In addition,' because of the high-speed rotation of the tire, and the tire valve The air tightness problem, when used for a long time, the air inside the tire may gradually leak out, which will cause the tire pressure to be too low, which will affect the driving safety. Therefore, related companies have developed many tire pressure display devices for this purpose. When the tire pressure is insufficient, they can immediately display a warning. Announcement No. 186905 "Improved structure of tire pressure warning device" includes an outer casing 'with a pressure-bearing film inside; a push rod located above the pressure-bearing film; a compression spring providing the push rod restoring force; and A warning device includes a first switch which is a normally closed switch disposed above the push rod; a second switch which is a normally open switch disposed above the first switch and connected to the first switch; A transmitter circuit is located between the push rod and the first switch, and is connected to the first H-gate; and the receiver circuit is provided at a position that can be clearly seen by the user when driving. Under different pressures, the tires can respectively reach the first and second switches and transmit signals, and the receiver displays the pressure state of each tire. Announcement No. 529559 "Film-type tire pressure gauge", which has a casing, M261387, a flexible stretch film, a push rod, an inner sleeve and a spring; the flexible stretch film is placed in the casing The accommodating chamber; the push rod combined with the flexible and retractable film can move with the retractable stroke of the flexible and retractable film; the inner sleeve is placed in the accommodating chamber of the casing. The film-type tire pressure gauge is fixedly installed on a tire valve to display the tire pressure. Announcement No. 574977 "Tire pressure warning device" includes a set of caps screwed onto a connecting body, which is formed by integrally forming a combination of a conductive base and a non-conductive base. A cap screw is arranged on the sleeve seat, and a launching device and a power supply device are provided in the inner space surrounded by the connecting body and the cap room, and a conductive member is provided between the launching device and the power supply device; a pressure The switch comprises a first contact point and a movable seat which is acted on by the diaphragm and constitutes the first contact point; an adjusting member is provided with an elastic element between the movable seat and the first contact point which connects the first contact point to the transmitting device; Circuit; a second group of circuits connecting the second contact point to the transmitting device; the connection base includes a joint portion separated by a spacer having an operation hole and a lead body portion integrated with the joint; the sleeve includes The molding covers the outer peripheral edge of the joint and the base body covering the lead body. The base body forms a trimming space and a sliding space inside the other side of the lead body. The base body is provided in the trimming space. Available for the tune The whole screw is provided with an internal thread; the seat body is provided with a circumferential surface in the sliding space for the sliding movement of the movable seat. The sliding seat can be moved up and down according to whether the tire pressure is normal or not, so as to be in contact with the connecting seat, so as to control whether its conductive circuit is connected and whether the tire pressure is insufficient. In addition, vehicle tires are generally negatively charged, and in the previous cases, the casing (or seat) connected to the tire valve is generally connected to the battery device 2 M261387 positive electrode and is positively charged. Accidental shooting of the casing and the negatively charged tire will cause a short circuit on the conductive line, which will cause its launch device 9 ", or act or malfunction, affecting its pressure warning function. It also said the above-mentioned case No. 574977 Although its structure is said to be clever, its structure is still complicated and it is inconvenient to assemble. Θ '[New content] Based on the above-mentioned shortcomings of the conventional tire pressure warning device (the shortcoming, this creation was created for the purpose of Provided is a tire pressure warning device, which simplifies its components and avoids short circuit of conductive lines. In order to achieve the above purpose, the original tire pressure warning device includes at least a metal casing, a horizontal partition is formed inside, and it is arranged near the top There are shoulders inside;-valve nozzle device installed on the lower part of the metal casing; a diaphragm installed on the top surface of the transverse compartment; a sleeve installed on the upper chamber and located in the Above the diaphragm , The sleeve is provided with a through hole at the top; a push rod is installed inside the sleeve, the bottom of the push rod touches the diaphragm, the top of the rod passes through the through hole of the sleeve, and the A ^ -directional convex component is formed near the bottom of the putter, between the convex ring of the putter and the top of the sleeve, and covering the outer periphery of the putter;-metal cymbal plate, installed on the «rod And the metal shoulder plate is pushed upward by the tire pressure and separated from the inner shoulder when the tire pressure is normal, when the tire pressure is insufficient, , The metal contact plate is in downward contact with the inner shoulder; a battery device is installed on the top surface of the contact plate, and the battery device is in contact with the metal contact plate M261387 with its negative electrode; A conductive element mounted on the positive electrode of the battery device; a transmitting device mounted on the conductive element and the top of the metal case; and a cover mounted on the outer periphery of the metal case. It is easy to assemble, and the external metal shell is connected to the metal contact plate. The negative electrode of the battery device is negatively charged, and has the same polarity as the negative electrical system of the tire. Therefore, when the metal case is in contact with the tire, it will not cause a short-circuit phenomenon or malfunction. [Embodiment] The following The creation is explained in detail with reference to the drawings. Among them, the first diagram is a perspective view of the appearance of the tire pressure warning device, the second picture is an exploded view of the tire pressure warning device, and the third picture is the tire pressure warning device A cross-sectional view when the tire pressure is normal, and FIG. 4 is a cross-sectional view when the tire pressure alarm is insufficient when the tire pressure is insufficient. As shown in the drawings, the creative tire pressure alarm includes a metal case 1 , A valve nozzle device 2, a diaphragm 3, a sleeve 4, a push rod 5, an elastic element 6, a battery device 7, a launch device 8, and a cover 9. The above-mentioned metal casing A horizontal partition u is formed inside, and the horizontal partition 11 partitions the inner boundary of the metal shell into an upper container 12 and a lower container 13. The transverse compartment 11 is provided with a central hole 14, and the metal casing 丨 is provided with an inner shoulder 15 at a position near the top of the upper container 12. The valve device 2 described above is installed in the lower chamber 13 of the metal case 1. The valve nozzle device 2 includes a valve nozzle 21 and a set of rings 22, which are sleeved around the outer periphery of the valve nozzle 21, and the top of the valve nozzle 21 is protruded into the metal M261387 housing 1 transverse partition 11之 中心 孔 14。 The center hole 14. The metal casing 1 is provided with an internal thread 16 on the inner wall of the lower chamber 13 and can be screwed to a tire nozzle (not shown), and the valve nozzle device 2 can be used to lift the valve so that the inside of the tire Air is introduced into the upper chamber I? Of the metal casing 1 through the valve nozzle device 2.
上述該膜片3係裝设於金屬殼體1橫隔座11之頂面。 該膜片3包括一體成型之外環部31及内環變形部32彼位 於該外環部之内圍區域。該膜片之内環變形部32的斷面形 狀為具有彎摺之形狀。該内環變形部32可受輪胎壓力而向 上突出變形，而該彎指形狀之内環變形部，則可提供該變 形部較大之變形空間。又，該内環變形部32中央部位形成 有一凹環槽33,可供承載下述推捍5之底部。 上述該套筒4係裝設金屬殼體丨之上部容室12 ,並< 於臈片3之上方。該套筒4包括一圓筒部41及—頂板4 彼位於該圓筒部之頂部’該頂板42中心設有—通孔.言 套筒4圓筒部41之底部係與膜片3外環部3ι之構形相㈣ 應’例如以凹凸構形相配應，因此，該套筒4乃係以^The diaphragm 3 is installed on the top surface of the horizontal partition 11 of the metal casing 1. The diaphragm 3 includes an integrally formed outer ring portion 31 and an inner ring deformed portion 32 located at the inner peripheral area of the outer ring portion. The cross-sectional shape of the inner ring deformed portion 32 of the diaphragm is a shape having a bend. The inner ring deformed portion 32 can be deformed to project upwardly under the pressure of the tire, and the bent inner ring deformed portion can provide a larger deformation space for the deformed portion. In addition, a concave ring groove 33 is formed at the central portion of the inner ring deformed portion 32, and can be used to carry the bottom of the pusher 5 described below. The sleeve 4 is provided with the upper housing 12 of the metal casing 丨 above the cymbal 3. The sleeve 4 includes a cylindrical portion 41 and a top plate 4 located at the top of the cylindrical portion. The top plate 42 is provided with a through hole in the center. The bottom of the sleeve 4 cylindrical portion 41 is connected to the outer ring portion of the diaphragm 3. The configuration of 3ι should correspond to, for example, a concave-convex configuration. Therefore, the sleeve 4 is ^
筒部41之底部壓抵膜片3之外環部31，使得該外環部2 破固定，而僅其内圍之内環變形部32可隨輪胎壓力而上_ 變形移動。 上述該推桿5係裝設於套筒4 ^ u 苌间4内部。該推桿5之底部 觸抵於膜片3之内環變形部32，例 甘— 如该推桿5為管狀推桿， 其底部觸抵於膜片3内環變形部 內π ^ 32之凹環槽33,乃可隨該 内％變形部32而上下移動。推★曰 ^ ^ 干7員部穿經套筒4之通孔 W而向上突伸，且該推桿5頂部 展叹有一金屬接觸板51彼 M261387 跨置於金屬殼體1之内凸启 桿間之組裝可採例如鉚；=二，觸板51與該推 合之裝設方式，採取螺固：式裝設’或採例如螺 …推桿5本體間之距::二:調節該金屬接觸板 離進而調郎下述彈性元件e之 抵抗舞力’而相對調節警示輪胎壓力不足時之歧值。又， :推桿5之近底部形成有一橫向凸環52，以供承載彈性元 件6 〇 上述該彈性元件6得获μ於施炉= 你裝汉於推柃5之橫向凸環52及套 筒…頁板42之間，並套覆於該推桿之外周。該彈性元件 系提ί、考复歸之彈力以對抗輪胎壓力。當輪胎壓力正常而 大於該彈性元# 6之彈力時，該輪胎壓力係會使膜片3之 内環變形部32向上突出變形，並將推桿5及金屬接觸板51 向上推頂，而使得該金屬接觸板51脫離與金屬殼體1之内 凸肩部15之接觸；相反的，當輪胎壓力不足而小於彈性元 件6之彈力時’其金屬接觸才反51則保持與該内凸肩部丄5 之接觸關係。 上述該電池裝置7係裝設於金屬接觸板5丨之頂面，且 該電池裝置7係以其負極與該金屬接觸板51相接觸，再經 金屬殼體1傳導至發射裝置8。該電池裝置之正極則經一傳 導元件71接通至該發射裝置8。 上述該發射裝置8係裝設於傳導元件71及金屬殼體J 之頂部’在接通電源時，可向外發射一訊號，並由一接收 器（通常係設於車内駕駛者容易觀視之位置，未圖示）接 收’以警示輪胎之壓力狀況。該發射裝置包括有一電路板 M261387 81，分別與該傳導το件71及該金屬殼體丨相接觸，而接通 至電池裝置之正、負極電源。 上述該蓋體9係以例如螺設方式裝設於金屬殼體丨頂 部之外周，以包覆及固定上述諸構件。 另外，在上述金屬接觸板51的外周及金屬殼體丨的内 壁之間，套設有一絕緣套管53，以隔絕該等金屬接觸板51 及金屬殼體1兩者側向間不當之接觸。 本創作胎壓警示器使用時，係以金屬殼體1之内螺紋 16螺裝於輪胎之氣嘴’貝I】閥嘴襄置2頂開該氣嘴，使得該 輪胎内部之空氣經由該閥嘴裝置2導入於金屬殼體丨之上 部容室1 2。 如第3圖所示，當輪胎内部空氣壓力足夠而正常時， 該輪胎壓力係會使膜片3之内環變形部32向上突出變形， 並將推桿5及金屬接觸板51向上推頂，而使得該金屬接觸 板51脫離與金屬殼體丨之内凸肩部15之接觸，此時，經 由金屬接觸板51而來之電池裝置7的負極未接通至發射裝 置8’亦即，該發射裝置8之供電線路係形成斷路，無法向 外發射訊號，即接收器未收到訊號，而表示此時之胎壓係 為正常。 如第4圖所示，當輪胎内部空氣壓力不足時，該輪胎 壓力無法對抗彈性元件6彈力以將推桿5及金屬接觸板Η 向上推頂，因此，該金屬接觸板51依彈性元件6之彈力而 保持與遠内凸肩部丨5之接觸關係，此時，經由金屬接觸板 51而來之電池裝置7的負極係接通至發射裝置8，使得該 M261387 發射裝置8之供電線路形成通路，而可向外發射一訊號， 而接收器接收到該訊號並以例如燈光警示，以表示此時之 胎壓係為不足，必須予以檢查輪胎或予充氣。 依本創作之構造，其組裝極為簡易，且外部之金屬殼 體於接通電路時係保持著負電，與輪胎為相同之極性，無 短路或誤動作之虞。 ί隹以上所述者，僅為本創作之一較佳實施例而已，並 非用來限定本织乍實施之範圍，|凡依本創作申請專利範 圍所述之形狀、構造、特徵及精神所為之均等變化與修飾， 均應包括於本創作之申請專利範圍内。 【圖式簡單說明】 第1圖係為本創作胎壓警示器之外觀立體圖。 第2圖為本創作胎壓警示器之分解圖。 第3圖為本創作胎壓警示器於胎壓正常時之剖面圖。 第4圖為本創作胎壓警示器於胎壓不足時之剖面圖。 【元件符號說明】 1·金屬殼體 11 ·橫隔座 12·上部容室 13 ·下部容室 14 ·中心孔 1 5 ·内凸肩部 11 M261387 16.内螺紋 - 2. 閥嘴裝置 . 21. 閥嘴 22. 套環 3. 膜片 31. 外環部 32. 内環變形部 3 3.凹環槽 4. 套筒 _ 41.圓筒部 4 2.頂板 43.通孔 5. 推桿 51. 金屬接觸板 52. 橫向凸環 53. 絕緣套管 6. 彈性元件 _ 7. 電池裝置 71.傳導元件 8. 發射裝置 81.電路板 9. 蓋體 12The bottom of the tube portion 41 is pressed against the outer ring portion 31 of the diaphragm 3, so that the outer ring portion 2 is broken and fixed, and only the inner ring deformation portion 32 of its inner periphery can be deformed and moved upwards with the tire pressure. The above-mentioned putter 5 is installed inside the sleeve 4 ^ u 苌 4. The bottom of the pusher 5 touches the deformed portion 32 of the inner ring of the diaphragm 3, for example, if the pusher 5 is a tubular pusher, the bottom of the pusher 5 touches the concave ring π ^ 32 in the deformed portion of the inner ring of the diaphragm 3. The groove 33 can move up and down with the inner deformation portion 32. Push ^ ^ ^ The 7 members pass through the through hole W of the sleeve 4 and protrude upward, and there is a metal contact plate 51 and M261387 on the top of the push rod 5 and the protruding lever is placed inside the metal casing 1. The assembly can be performed by, for example, riveting; = Two, the contact plate 51 and the push-in installation method are screwed: type installation 'or the distance between the main body of the pusher 5 :: two: adjust the metal The contact plate is separated, and then the relative dance force of the elastic element e described below is adjusted, and the relative adjustment is used to warn of the difference when the tire pressure is insufficient. In addition, a lateral convex ring 52 is formed near the bottom of the push rod 5 to support the elastic element 6. The elastic element 6 obtained above is used in the furnace = you install the lateral convex ring 52 and the sleeve of the push 5 ... between the sheet plates 42 and covering the outer periphery of the putter. This elastic element is designed to resist the pressure of the tires. When the tire pressure is normal and greater than the elastic force of the elastic element # 6, the tire pressure system will cause the inner ring deformation portion 32 of the diaphragm 3 to protrude upward and deform, and push the push rod 5 and the metal contact plate 51 upward, so that The metal contact plate 51 comes out of contact with the inner shoulder portion 15 of the metal housing 1; on the contrary, when the tire pressure is insufficient and less than the elastic force of the elastic element 6, its metal contact is reversed and the 51 remains in contact with the inner shoulder portion.丄 5 contact relationship. The battery device 7 described above is installed on the top surface of the metal contact plate 5 丨, and the battery device 7 is in contact with the metal contact plate 51 with its negative electrode, and is then conducted to the emitting device 8 through the metal case 1. The positive electrode of the battery device is connected to the transmitting device 8 via a conducting element 71. The above-mentioned transmitting device 8 is installed on the top of the conducting element 71 and the metal casing J. When the power is turned on, a signal can be transmitted outward, and a receiver (usually installed in the car is easily visible to the driver). Position, not shown) Receive 'to warn of tire pressure. The transmitting device includes a circuit board M261387 81, which is in contact with the conductive το member 71 and the metal casing, respectively, and is connected to the positive and negative power sources of the battery device. The cover 9 is installed on the outer periphery of the top portion of the metal casing 丨 by means of screwing, for example, to cover and fix the above-mentioned members. In addition, an insulating sleeve 53 is sleeved between the outer periphery of the metal contact plate 51 and the inner wall of the metal case 丨 to isolate the metal contact plate 51 and the metal case 1 from improper lateral contact. When the tire pressure warning device is used, the internal thread 16 of the metal casing 1 is screwed to the tire nozzle of the tire. The valve nozzle is placed 2 to open the valve, so that the air inside the tire passes through the valve. The nozzle device 2 is introduced into the upper housing 12 of the metal casing. As shown in FIG. 3, when the air pressure inside the tire is sufficient and normal, the tire pressure system will cause the inner ring deformation portion 32 of the diaphragm 3 to protrude and deform upward, and push the push rod 5 and the metal contact plate 51 upward, As a result, the metal contact plate 51 is released from contact with the inner shoulder portion 15 of the metal casing. At this time, the negative electrode of the battery device 7 coming through the metal contact plate 51 is not connected to the emission device 8 ', that is, the The power supply line of the transmitting device 8 is disconnected, and signals cannot be transmitted outward, that is, the receiver does not receive the signal, which indicates that the tire pressure at this time is normal. As shown in FIG. 4, when the air pressure inside the tire is insufficient, the tire pressure cannot resist the elastic force of the elastic element 6 to push the push rod 5 and the metal contact plate Η upward. Therefore, the metal contact plate 51 follows the elastic element 6. The elastic force maintains the contact relationship with the far inner shoulder 5 at this time. At this time, the negative electrode of the battery device 7 coming through the metal contact plate 51 is connected to the transmitting device 8, so that the power supply line of the M261387 transmitting device 8 forms a path. However, a signal can be transmitted outward, and the receiver receives the signal and uses, for example, a light warning to indicate that the tire pressure at this time is insufficient, and the tire must be inspected or inflated. According to the structure created by this creation, its assembly is extremely simple, and the external metal shell maintains negative electricity when it is connected to the circuit. It has the same polarity as the tire, and there is no risk of short circuit or malfunction. The above is only one of the preferred embodiments of this creation, and is not intended to limit the scope of this weaving practice. | Every shape, structure, feature, and spirit described in the scope of this creation application patent Equal changes and modifications shall be included in the scope of the patent application for this creation. [Schematic description] Figure 1 is a perspective view of the appearance of the created tire pressure warning device. Figure 2 is an exploded view of the created tire pressure warning device. Figure 3 is a cross-sectional view of the tire pressure warning device when the tire pressure is normal. Figure 4 is a sectional view of the tire pressure warning device when the tire pressure is insufficient. [Description of component symbols] 1 · Metal housing 11 · Cross base 12 · Upper chamber 13 · Lower chamber 14 · Center hole 1 5 · Inner shoulder 11 M261387 16.Internal thread-2. Valve nipple device. 21 Valve nipple 22. Collar ring 3. Diaphragm 31. Outer ring portion 32. Inner ring deformed portion 3 3. Concave ring groove 4. Sleeve _ 41. Cylindrical portion 4 2. Top plate 43. Through hole 5. Push rod 51. Metal contact plate 52. Transverse convex ring 53. Insulating sleeve 6. Elastic element _ 7. Battery device 71. Conductive element 8. Transmitting device 81. Circuit board 9. Cover 12