TW200903528A

TW200903528A - PTC device

Info

Publication number: TW200903528A
Application number: TW097118860A
Authority: TW
Inventors: Yutaka Ikeda
Original assignee: Murata Manufacturing Co
Priority date: 2007-05-30
Filing date: 2008-05-22
Publication date: 2009-01-16
Also published as: JPWO2008149645A1; CN101568977A; TWI384499B; WO2008149645A1; KR101025712B1; CN101568977B; KR20090077839A; JP4877390B2

Abstract

Provided is a PTC device wherein an allowable current of a section, which has a reduced cross-section area and fuses by an abnormal excessive current, is reduced. The PTC device is provided with a pair of terminal plates (20, 22) facing each other, and a plurality of PTC elements (11), which are arranged on a row along the pair of terminal plates (20, 22), sandwiched between the pair of terminal plates (20, 22), and are electrically connected between the pair of terminal plates (20, 22). The pair of terminal plates (20, 22) have extracting ends (20b, 22b) connected to power supplies, respectively. On the pair of terminal plates (20, 22), cross-section area reduced sections (20d, 22d) having partially small cross-section area are formed between at least adjacent pair of PTC elements (11).

Description

200903528 九、發明說明：【發明所屬之技術領域】本發明係關於一種具有具正溫度特性之PTC元件的 PTC裝置。【先前技術】以往’在一定溫度範圍内具有電阻值與溫度急速增加之正溫度特性的熱敏電阻（Positive Temperature Coefficient ThermiSt〇r :正溫度係數熱敏電阻）元件（以下，稱為「PTC 元件」）’係被利用作為暖氣器具等之發熱體。由於PTC元件係在正溫度特性區域中，若溫度上升則使電阻值變大以限制電流來抑制發熱，反之若溫度下降則使電阻值降低以增加電流來促進發熱，藉此在發熱時保持 :大致疋之溫度，因此易於利用作為發熱體。 / V. 然而，由於在較正溫度特性區域更高溫區域中，具有又特性，因此在負溫度特性區域中，溫度愈上升則會使電阻值愈小’導致增加更多電流來促進發熱，而變成二因此’在使用PTC元件< pTc冑置，係於將電流供應於PTC元杜夕# 2丄板’局部形成橫截面之截面積較小的截面積減少部，在里當 1常大電流(以下，稱為「異常過電流」）且月'兄τ ’以使截面積減少部選擇性發熱而溶斷，而 -呆險絲功能的方式所構細如，參照專利文獻… 利文獻1 :日本實開昭52- 171738號公報 200903528 【發明内容】例如在暖風加熱器，如圖1(a)之俯視圖、圖丨（b)之前視圖、圖1⑷之仰視圖所示，於—對端子板4, 6之間，挟持將外部電極2b，2e形成於PTC元件2a之端子板4, 6側表面的複數個PTC元件2,並於其外側，如圖2之截面圖所不’透過絕緣板8組裝於配置有散熱片5的pTc裝置卜使散熱片5受風’以將PTC元件2所產生之熱從 5 取出。如圖1所示，端子板4, 6係於狹持PTC元件2之主要連接於電源之抽出端部4<：，6<：之間，形成有寬度（棱截面）局部較狹窄的截面積減少部電：流過柄出端…之間時，由於截面積減少部= 之：阻值切其他部分，因此截面積減少部4“會選擇 ^ ^熱、熔化、最後熔斷。藉此以阻斷異常過電流。之..^HPTC元件在從常溫_ 25。〇至達到發熱穩定 ::=T?右)為止之期間，具有電阻值會暫時降低之酿度—電阻特性。因此，於截面積剛開始運轉後會暫時性產生較發熱穩定時:= 電流)。例如以loov、12_ :大之電…入下，會產生f女& W 額疋運轉之PTC裝置的情況最大為20A之突入電流。由於對ρτ 面積減少部係要求不可因 < 置之截少部之容許電流係設定為::2::而_，因此截面賴如圖3所示，如此將截面積減少部之容許電流為25Α 200903528 之PTC裝置94組裝於暖風加熱器組92的情況下，於暖風加熱器組92所連接之10〇v系統的配電盤90,係設置有2〇a 之斷路器’暖風加熱器組92内亦設有2〇A之玻璃管保險絲96。因此’即使異常過電流流至PTC裝置94，玻璃管保險絲96或配電盤9〇之斷路器，會在pTc裝置94之截面積減少部之前阻斷電流，PTC裝置94之截面積減少部並無發揮功能之機會。換言之，暖風加熱器組92係在2〇a 以上之大電流流動之前無法檢測出異常而予以停止。若將複數個額定值較小之PTC裝置加以組合運用時，雖可避免此種問題，但如此會產生因增加零件數量而使構造變得複雜等問題。本發明有鐘於此實情，而欲提供一種pTC裝置，可降低因異常過電流而熔斷之截面積減少部之容許電流。本發明，為解決上述問題，提供如下構成之爪裝置。 PTC裝置有-種具有彼此相對向之_對端子板；及複數個PTC元件，沿該一對端子板排列成—列，並挾持於該 :對端子板間且於該一對端子板間形成電氣並聯；該二對立而子板之抽出端部分別連接於電源。該—對端子板係於相鄰接之至少1組該PTC元件之間，的戴面積減少部。纟有截面積局部較小形成缺口槽或貫通孔、或切削端子板：二例如在端子板厚度方向，以縮小端子板之寬度或厚 ^方向、或切削200903528 IX. Description of the Invention: [Technical Field] The present invention relates to a PTC device having a PTC element having positive temperature characteristics. [Prior Art] A thermistor (Positive Temperature Coefficient ThermiSt〇r) element having a positive temperature characteristic in which a resistance value and a temperature increase rapidly in a certain temperature range (hereinafter, referred to as a "PTC element" ")" is used as a heating element such as a heating appliance. Since the PTC element is in the positive temperature characteristic region, if the temperature rises, the resistance value is increased to limit the current to suppress heat generation, and if the temperature is lowered, the resistance value is lowered to increase the current to promote heat generation, thereby maintaining the heat generation: The temperature is roughly the same, so it is easy to use as a heating element. / V. However, since it has a characteristic in a higher temperature region in the region of the positive temperature characteristic, in the region of the negative temperature characteristic, the higher the temperature is, the smaller the resistance value is, resulting in an increase in more current to promote heat generation. Secondly, 'in the use of PTC element < pTc device, is to supply current to the PTC element Du Xi # 2 丄 plate' partial cross-sectional area of the cross-sectional area of the cross-sectional area is smaller, in the 1 constant current (Hereinafter, it is called "abnormal overcurrent") and the month 'brother τ' is melted by selective heat generation in the cross-sectional area reduction part, and the method of the function of the stagnation silk is as detailed as the patent document... Japanese Patent Application Laid-Open No. SHO-52-171738, No. 200903528, for example, in the warm air heater, as shown in the top view of Fig. 1 (a), the front view of Fig. 1 (b), and the bottom view of Fig. 1 (4), Between the terminal plates 4, 6, the external electrodes 2b, 2e are formed on the PTC element 2a on the terminal plate 4, 6 side surface of the plurality of PTC elements 2, and on the outside, as shown in the cross-sectional view of Fig. 2 The insulating plate 8 is assembled to the pTc device in which the heat sink 5 is disposed. Hot wind receiving sheet 5 'to the heat generated by the PTC element 2 is taken out of 5. As shown in FIG. 1, the terminal plates 4, 6 are formed in a narrow cross-sectional area of the narrow PTC element 2 mainly connected to the extraction end portions 4 <:, 6 <: of the power supply. When the flow is reduced between the end of the shank and the end of the shank, the cross-sectional area reduction portion = the resistance cuts the other portion, so the cross-sectional area reducing portion 4 "chooses heat, melt, and finally fuses. Abnormal abnormal overcurrent. . . . ^HPTC component from the normal temperature _ 25 〇达到达到达到达到达到达到 : : : : : : : : : : , , , , , , , 具有具有具有具有具有具有具有具有具有 H H H H H H H H H When the area starts to operate, it will temporarily generate a more stable heat: = current. For example, if you use loov, 12_: big power..., it will produce f female & W. The maximum PTC device for operation is 20A. The inrush current is required. Since the ρτ area reduction factor is not required because the allowable current system of the cut-off portion is set to ::2:: and _, the cross section is as shown in Fig. 3, so that the cross-sectional area reduction portion is The case where the PTC device 94 with an allowable current of 25 Α 200903528 is assembled to the heater heater group 92 The switchboard 90 of the 10〇v system connected to the heater heater group 92 is provided with a 2〇a circuit breaker. The heater heater group 92 is also provided with a 2〇A glass tube fuse 96. Therefore Even if an abnormal overcurrent flows to the PTC device 94, the circuit breaker of the glass tube fuse 96 or the switchboard 9 blocks the current before the cross-sectional area reduction portion of the pTc device 94, and the cross-sectional area reduction portion of the PTC device 94 does not function. In other words, the heater heater group 92 cannot stop abnormally before the large current of 2〇a or more flows and stops. If a plurality of PTC devices with a small rated value are used in combination, this can be avoided. However, there is a problem that the structure is complicated by the increase in the number of parts. The present invention has a clock, and it is desirable to provide a pTC device which can reduce the allowable cross-sectional area reduction portion which is blown by an abnormal overcurrent. The present invention provides a claw device having the following configuration in order to solve the above problems. The PTC device has a pair of terminal plates facing each other, and a plurality of PTC elements arranged along the pair of terminal plates And maintaining the electrical parallel connection between the terminal plates and between the pair of terminal plates; the two opposite ends of the sub-boards are respectively connected to the power source. The pair of terminal plates are connected to at least one of the adjacent groups The wearing area between the PTC elements is reduced. The cross-sectional area is partially smaller to form the notch groove or the through hole, or the cutting terminal plate: for example, in the thickness direction of the terminal plate, to reduce the width or thickness of the terminal plate, Or cutting

的口P刀。複數個PTC 200903528 70件，可以直線狀、曲線狀、鋸齒狀等任意形狀排成一列。根據该構成’截面積減少部係異常過電流流動即熔斷，而具有保險絲之功能。僅流至配置於截面積減少部其中一側之PTC元件的電流才會流至設於相鄰接之PTC元件間之端子板的截面積減少部，僅流過PTC裝置之全部電流中之一部分，才會流至設於相鄰接之PTC元件間之端子板的截面積減少部。因此，與流過PTC裝置之全部電流皆流過截面積減少部之情形相較，可降低容許電流。車又佳為’该一對端子板係於抽出端部與位於最靠近抽出端部侧之PTC元件之間、及複數個PTC元件間之中，於2處以上形成有該截面積減少部。又，愈遠離該抽出端部之位置的截面積減少部，該截面積愈小。此時藉由形成複數個截面積減少部，由於即使將截面積減 >、。卩之谷許電流設定為較小，亦可充分承受突入電流，因此可將截面積減少部之截面積設計成更小。因此，不剛在任何PTC元件產生異常過電流時，便能以更小之電流使截面積減少部溶斷。The mouth of the P knife. A total of 70 pieces of PTC 200903528 can be arranged in a line in any shape such as straight, curved or jagged. According to this configuration, the cross-sectional area reducing portion has a function of a fuse because the abnormal overcurrent flows and is blown. Only the current flowing to the PTC element disposed on one side of the cross-sectional area reducing portion flows to the cross-sectional area reducing portion of the terminal plate provided between the adjacent PTC elements, and only flows through one of the entire currents of the PTC device Then, it flows to the cross-sectional area reducing portion of the terminal plate provided between the adjacent PTC elements. Therefore, the allowable current can be reduced as compared with the case where all the current flowing through the PTC device flows through the cross-sectional area reducing portion. Further, the pair of terminal plates are formed between the drawing end portion and the PTC element located closest to the drawing end side, and between the plurality of PTC elements, and the cross-sectional area reducing portion is formed at two or more places. Further, the cross-sectional area reduction portion which is farther away from the position at which the end portion is taken out, the smaller the cross-sectional area. At this time, by forming a plurality of cross-sectional area reducing portions, even if the cross-sectional area is reduced by >. The current of the valley is set to be small, and the inrush current can be fully withstood, so that the cross-sectional area of the cross-sectional area reduction portion can be designed to be smaller. Therefore, the cross-sectional area reducing portion can be melted with a smaller current just when an abnormal overcurrent is generated in any of the PTC elements.

^較佳為，該一對端子板係分別於該抽出端部與位於最靠近該抽出端部側之PTC元件之間、及所有複數個PTC 元件之間，形成有截面積減少部。又，愈遠離該抽出端部之位置的截面積減少部，該截面積愈小。此時，針對每一個PTC元件若異常過電流流過時，便可使與該PTC元件相鄰接之任一截面積減少部炼冑。相較於針對複數個PTC元件一併設置截面積減少部之情形，由 200903528 於可以IM、電流使截面積減少部料，且料之部分亦增加，因此可進一步提升安全性。曰較佳為’於相鄰接之至少1組該PTC元件之間，配置有將該PTC元件自該端子板之該截面積減少部隔開的間隔件。此時，可使端子板之截面積減少部避免與PTC元件接觸。藉此，可防止端子板之截面積減少部之功能因端子板積減夕與PTC元件接觸而降低。χ，端子板之截面積減少部溶斷時’能以間隔件來防止該影響擴及PTC元件’而可將損害盡量減小。較佳為，該端子板之該截面積減少部的容許電流，係小於連接纟該端子板之㈣出端部㈣€源間t過電流保護零件的額定電流。 PTC裝置在透過抑制過電流之保險絲或斷路器等過電流T護零件連接於電源時，藉由使端子板之截面積減少部 +電机小於過電流保護零件之額定電流，便能以截面 T減f部阻斷較過電流保護零件之額定電流小的異常過電流。藉此，即可抑制小於過電流保護零件之額定電流的異常過電流，以進一步提升安全性。根據本發明，可降低因異常過電流而熔斷之截面積減少部的容許電流。【實施方式】以下，針對本發明之實施形態參照圓4〜圖丨〇作說明。 200903528 <實施例i>針對實施例！之PTC裝置參照圖4〜圖 7作說明。圖4係截面圖，圖5(a)係沿圖4之線a— a觀察的俯視圖，圖5 (b)係沿圖4之線B〜b _玆a/w— 〇蜆祭的俯視圖，圖6係要部構成圖，w 7係沿圖4之線c—c切斷的橫截面圖。如圖4所示，PTC裝置1G係於—對端子板从^之間，挾持複數個（圖中為4個）PTC元件u，並於苴外側透過絕緣板24,25設置具有散熱片3〇之外殼構件12^4。此外’如圖5及圖6所示，PTC元件u係於例如由㈣〇3 系半導體陶瓷構成之PTC元件11 a之迪工4 / 几汁1丨a之如子板側的整體表面，形成例如由Ni等構成之第丄外部電極⑴，並進一步於其上形成具有較PTC元# 11 r絲, 70仵11周緣小—圈之周緣之例如由Ag專構成的第2外部電極11 c。如圖5及圖6所示，沿端子杯？ n %于扳20, 22之主要部2〇a, 22a 係配置PTC元件ll，p丁11 仟11 PTC 7G件U之第2外部電極llc則分別抵接於端子板2〇 22之主要邱％Preferably, the pair of terminal plates are formed with a cross-sectional area reducing portion between the extraction end portion and the PTC element located closest to the extraction end side and between all of the plurality of PTC elements. Further, the cross-sectional area reducing portion which is farther away from the extracted end portion has a smaller cross-sectional area. At this time, if an abnormal overcurrent flows for each PTC element, any cross-sectional area reducing portion adjacent to the PTC element can be refining. Compared with the case where the cross-sectional area reduction portion is provided for a plurality of PTC elements, the cross-sectional area can be reduced by IM and current, and the portion of the material is also increased, thereby further improving the safety. Preferably, a spacer separating the PTC element from the cross-sectional area reducing portion of the terminal plate is disposed between at least one of the adjacent PTC elements. At this time, the cross-sectional area reducing portion of the terminal block can be prevented from coming into contact with the PTC element. Thereby, it is possible to prevent the function of the cross-sectional area reducing portion of the terminal block from being lowered due to the contact of the terminal plate with the PTC element. When the cross-sectional area reduction portion of the terminal block is melted, the damage can be prevented by the spacer to prevent the influence from spreading to the PTC element, and the damage can be minimized. Preferably, the allowable current of the cross-sectional area reducing portion of the terminal block is smaller than the rated current of the (four) output end portion of the terminal plate of the terminal plate. When the PTC device is connected to the power supply through an overcurrent T-protection such as a fuse or a circuit breaker that suppresses an overcurrent, the cross-sectional area reduction portion of the terminal plate + the motor is smaller than the rated current of the overcurrent protection component, and the cross section T can be obtained. The minus f section blocks an abnormal overcurrent that is smaller than the rated current of the overcurrent protection component. Thereby, an abnormal overcurrent smaller than the rated current of the overcurrent protection part can be suppressed to further improve safety. According to the present invention, the allowable current of the cross-sectional area reducing portion that is blown by the abnormal overcurrent can be reduced. [Embodiment] Hereinafter, an embodiment of the present invention will be described with reference to a circle 4 to a figure. 200903528 <Example i> for an embodiment! The PTC device will be described with reference to Figs. 4 to 7 . Figure 4 is a cross-sectional view, Figure 5 (a) is a plan view taken along line a - a of Figure 4, Figure 5 (b) is a plan view of the burnt offering along line B to b - a / w - Figure 4 of Figure 4, Fig. 6 is a configuration diagram of a main part, and w 7 is a cross-sectional view taken along line c-c of Fig. 4. As shown in FIG. 4, the PTC device 1G is connected to a plurality of (four in the figure) PTC elements u between the terminal plates, and is provided with a heat sink 3 through the insulating plates 24, 25 outside the crucible. The outer casing member 12^4. Further, as shown in FIG. 5 and FIG. 6, the PTC element u is formed on the entire surface of the PTC element 11a of the PTC element 11a made of, for example, a (4) 〇3 series semiconductor ceramic, such as a sub-plate side. For example, the second external electrode (1) made of Ni or the like is further formed with a second external electrode 11c made of, for example, Ag, having a circumference smaller than the circumference of the PTC element #11r wire and 70仵11. As shown in Figure 5 and Figure 6, along the terminal cup? n % is disposed in the main portion 2〇a, 22a of the pull 20, 22, and the second external electrode llc of the PTC 7G member U is respectively abutted to the main junction of the terminal block 2〇22

V ，ζ之王要邓2〇a，22a，形成電氣並聯。山端子板20, 22係使用不錄鋼、銅合金、銘等形成。於板，22之主要部2〇a，22a與抽出端部20b, 22b之間，形成有寬度（亦即橫截面）局部較小的截面積減少部 2〇C，22e。於端子板风22之主要部2()3，仏之中間位置，亦形成有寬度（亦即橫截面）戰由）局。卩較小的截面積減少部〇d，22d。主要部20a 22之申 9Λ , _ , Τ間位置的截面積減少部 20d，22d係較抽出端邱之他ν, ° ， 2b側之截面積減少部20c,22c 10 200903528 寬度（亦即橫截面）更小，於排列成一列之PTC元件11的中央，配置有間隔件 28。間隔件28係與設於端子板20，22之主要部2〇a 22 之中間位置的截面積減少部20d，22d相對向，與截面#咸少部20d，22d相對向以防止配置PTC元件1 i。於間隔件28 形成有貫通孔29，截面積減少部20d，22d係露出於貫通孔 29。間隔件28係藉由將屬耐熱性較高且難燃性材料之带母沖切加工而形成。由於設於端子板20, 22之主要部20a，22a的截面積減少部20d，22d，並未與PTC元件Η接觸而露出於間隔件μ 之貫通孔29,因此由於異常過電流流動而發熱時熱並不會傳導至PTC元件11，因此可迅速且確實熔斷。又，截面積減少部20d，22d係在間隔件28内熔斷，間隔件28可防止熔斷後之截面積減少部20d，22d飛散至他處。此外，雖亦可设成未设間隔件28之構成，但在該情況下亦不使元件11與端子板20，22之截面積減少部2〇d，22d接觸。若 PTC兀件11接觸及端子板2〇, 22之截面積減少部2〇d，22d，則形成於ptc tl件表面之第丨外部電極丨lb便會與截面積減少部20d，22d重疊’實質上即透過pTC元件之第1外部電極lib而導通，截面積減少冑20d，22d之區域即減少， 3文果則會變小。如圖4所示，挾持PTC元件11之端子板20, 22之主要部20a，22a’係配置於外殼構件12, 14之間且將絕緣板 % 25包夾於與外殼構件12, 14之間。端子板％ 22之抽 200903528 出端部20b，22b，係您认纽此 “ 外殼構件12, 14向外側，且彼此往相反側突出。絕緣板24，且彼此在如為氧化銘板。 ’、易傳導熱之絕緣性板，例如虛線所示，於端早拉係固定用以供應電源之端子構件34=出M ♦ 22b，於加熱器系統時，例如與圖3同樣地，：二置1〇組裝過屬過電流仵镬零株夕γ 冓件3 4係透電保零件之保險絲或斷路器連接於電源。又， =Γ二4與外殼構#12,14之間，係配置後合於外 H /夫FI之抽出端部的保護蓋32。於保護蓋32内侧圖示)’以該突起按壓沿端子板2〇,22排列之 PTC兀件11及間隔件 .,,牛之列的兩側來定位。保護蓋32 係使用樹脂或橡料具有彈性之絕緣材料而形成。邱：圖7所示，外殼構件12, 14係設有散熱片30之基二Μ此相對向配置，於基部…4a之間，第i ’ 14b及第2片12c，14c分別從基部⑶，以截面 W狀延伸，透過彈勞構件16卡合。亦即，外殼構件AM 之第2片12c，14c係彼此相對向’於第2片⑶，W之間酉己置有彈簧構# 16。彈簧構件16，係於軸方向形成有縫隙之錄彈性構件，往彼此分開之方向㈣外殼構件AM 之第2片12c，14c ’藉此使外殼構件〜斗之基部⑵，… 彼此接近，以保持將PTC元件u及間隔件28、端子板2〇, ”、及絕緣板24,25挾持於外殼構# i2，i4之基部12一的狀遙。如圖7所示，絕緣板24, 25係寬度較端子板2〇,22寬， 12 200903528 於端子板20, 22、PTC元件u及間隔件28之兩側，配置有絕緣構件26, 27。絕緣構件26, 27係使用例如雲母而形成。於絕緣板24, 25及絕緣構件26, 27之側面，:殼構^ 12，14之第1片12b，14b係相對向。絕緣板24,乃及絕緣構件26, 27，係覆蓋端子板20, 22、PTC元件丨i及間隔件 Μ之周圍，使端子板20, 22與外殼構件12, 14絕緣。在組裝PTC裝置1 〇時’首先於外殼構件】2，丨4之第 2片12c，14c與基部12a，14a之間，以使另一外殼構件μ 之第2片l2c，14c進入的方式，組裝外殼構件ΐ2, μ。接著，於藉由外殼構件12，14之基部12&，1粍及第1片121?，1仆所形成之截面為矩形之空間，從外殼構件12, 14之端部以適當順序插入ptc元件11及間隔件28、端子板2〇, 22、、、-巴緣板24, 25、及絕緣構件26, 27，以配置於既定位置後，於外殼構件12, Μ之第2片Uc，Uc之間插入彈簧構件16，藉由彈簣構件16彈推使外殼構件12, 14之基部na, 1 皮此接近。接著，將保護蓋32蓋在外殼構件ΐ2, Μ之端邛，再藉由點焊等將端子構件34固定於端子板2〇, 22之抽出端部20b, 22b。如圖6中虛線所示，電流便從一側之端子板2〇的抽出 P 20b，透過PTC元件丨丨流至另一侧之端子板的抽而。P 22b。圖中，若以由左依序分別流至pTC元件i】電机為1丨、i2、、I#時，於一側之端子板2〇之截面積減少部20d，僅有分別流至圖中截面積減少部2〇d右側之個PTC 7C件11之電流is、丨4的合計電流卜、、流動。於 13 200903528 另一側之端子板22之截面積減少部22d，僅有分別流至圖中截面積減少冑22d左側之2㈤pTC元件U之電流^L 的合計電流kb流動。於端子板2〇,22之抽出端部2扑所設之截面積減少部2〇c，22c，則有所有流至pTc元件i i 之電流丨丨、i2、i3、i4的合計電流h、i2、i3、i4流動。V, the king of the king wants Deng 2〇a, 22a to form an electrical joint. The mountain terminal plates 20 and 22 are formed using unrecorded steel, copper alloy, or the like. Between the main portions 2a, 22a of the plate 22 and the extracted end portions 20b, 22b, a cross-sectional area reducing portion 2C, 22e having a small width (i.e., a cross section) is formed. In the middle portion 2 () 3 of the terminal block wind 22, the middle portion of the crucible 22 is also formed with a width (i.e., cross section).卩 Smaller cross-sectional area reduction 〇d, 22d. The cross-sectional area reducing portion 20d, 22d of the main portion 20a 22 is the cross-sectional area reducing portion 20c, 22c 10 200903528 width (i.e., the cross section) of the ν, °, 2b side of the extraction end. Further, the spacers 28 are disposed in the center of the PTC elements 11 arranged in a line. The spacer 28 is opposed to the cross-sectional area reducing portions 20d and 22d provided at the intermediate positions of the main portions 2A and 22 of the terminal plates 20 and 22, and faces the cross-sections of the small portions 20d and 22d to prevent the PTC element 1 from being disposed. i. A through hole 29 is formed in the spacer 28, and the cross-sectional area reducing portions 20d and 22d are exposed to the through hole 29. The spacer 28 is formed by punching a tape which is a heat resistant material and a flame retardant material. Since the cross-sectional area reducing portions 20d and 22d provided in the main portions 20a and 22a of the terminal plates 20 and 22 are not exposed to the PTC element 而 and are exposed to the through hole 29 of the spacer μ, heat is generated due to abnormal overcurrent flowing. Heat is not conducted to the PTC element 11, so it can be quickly and surely blown. Further, the cross-sectional area reducing portions 20d and 22d are blown in the spacer 28, and the spacer 28 prevents the cross-sectional area reducing portions 20d and 22d from being squirmed to be scattered elsewhere. Further, although the spacer 28 may not be provided, in this case, the element 11 is not brought into contact with the cross-sectional area reducing portions 2〇d and 22d of the terminal plates 20 and 22. When the PTC element 11 is in contact with the terminal plate 2, 22, and the cross-sectional area reducing portion 2〇d, 22d, the second external electrode 丨1b formed on the surface of the ptc tl is overlapped with the cross-sectional area reducing portions 20d, 22d. In essence, the first external electrode lib of the pTC element is turned on, and the cross-sectional area is reduced by d20d, and the area of 22d is reduced, and the effect is reduced. As shown in FIG. 4, the main portions 20a, 22a' of the terminal plates 20, 22 holding the PTC element 11 are disposed between the outer casing members 12, 14 and sandwich the insulating plate % 25 between the outer casing members 12, 14. . Terminal plate % 22 pumping 200903528 Outlet portions 20b, 22b, you can recognize this "the outer casing members 12, 14 are outward, and protrude to the opposite side from each other. The insulating plates 24, and each other as an oxidation nameplate." The heat-conducting insulating plate is, for example, shown by a broken line, and the terminal member 34 for supplying power is fixed at the end of the drawing, and is M ♦ 22b. For the heater system, for example, similar to FIG. 3, two sets of one turn The fuse or circuit breaker of the over-current 仵镬株夕 γ 3 4 4 4 4 4 4 连接连接连接连接连接连接连接。保险丝保险丝保险丝保险丝保险丝保险丝保险丝保险丝保险丝保险丝保险丝保险丝保险丝保险丝保险丝保险丝保险丝保险丝保险丝保险丝保险丝保险丝The protective cover 32 of the outer end of the H/F FI is shown on the inside of the protective cover 32. The PTC element 11 and the spacer which are arranged along the terminal plates 2, 22 are pressed by the protrusions, and the column of the cattle The two sides are positioned. The protective cover 32 is formed by using an elastic insulating material of resin or rubber. Qiu: As shown in Fig. 7, the outer casing members 12, 14 are provided with the bases of the fins 30. Between the bases 4a, the i' 14b and the second pieces 12c, 14c extend from the base portion (3) in a cross-sectional shape W, and are transmitted through the bullets. The member members 16 are engaged, that is, the second pieces 12c, 14c of the outer casing member AM are opposed to each other in the second piece (3), and a spring structure #16 is placed between the W members. The spring member 16 is attached to the axial direction. The recording elastic members forming the slits are separated from each other (4) the second sheets 12c, 14c' of the outer casing members AM thereby bringing the base members (2), ... of the outer casing members into close proximity to each other to hold the PTC members u and the spacers 28 The terminal plates 2, ”, and the insulating plates 24, 25 are held by the base 12 of the outer casing structure #i2, i4. As shown in Fig. 7, the insulating plates 24, 25 are wider than the terminal plates 2, 22, and 12 200903528 are provided with insulating members 26, 27 on both sides of the terminal plates 20, 22, the PTC element u and the spacer 28. The insulating members 26, 27 are formed using, for example, mica. On the side faces of the insulating sheets 24, 25 and the insulating members 26, 27, the first sheets 12b, 14b of the shell members 12, 14 are opposed to each other. The insulating plate 24, and the insulating members 26, 27, cover the periphery of the terminal plates 20, 22, the PTC element 丨i and the spacer, and insulate the terminal plates 20, 22 from the outer casing members 12, 14. When the PTC device 1 is assembled, the first piece 12c, 14c of the other outer casing member μ is first inserted between the second piece 12c, 14c of the crucible 4 and the base portions 12a, 14a when the PTC device 1 is assembled. Assemble the housing member ΐ2, μ. Next, the ptc element is inserted in an appropriate order from the ends of the outer casing members 12, 14 by the base portions 12&, 1 and the first piece 121?, 1 of the outer casing members 12, 14 having a rectangular cross section. 11 and the spacers 28, the terminal plates 2, 22, 22, 25, and the insulating members 26, 27, after being placed at a predetermined position, on the outer casing member 12, the second piece Uc, Uc The spring member 16 is inserted between the base members na, 1 of the outer casing members 12, 14 by the spring member 16 being pushed. Next, the protective cover 32 is placed over the outer casing member 2, and the terminal member 34 is fixed to the terminal portions 2b, 22b of the terminal plates 2, 22 by spot welding or the like. As shown by the broken line in Fig. 6, the current is drawn from the terminal plate 2 of one side, P 20b, and is drawn through the PTC element to the terminal plate on the other side. P 22b. In the figure, if the motor flows to the pTC element i], the motor is 1丨, i2, and I#, and the cross-sectional area reducing portion 20d of the terminal block 2〇 on one side flows only to the figure. The currents is and the total currents of the currents is and 丨4 of the PTC 7C members 11 on the right side of the medium-sectional area reducing portion 2〇d flow. On the other side, the cross-sectional area reducing portion 22d of the terminal block 22 on the other side flows only to the total current kb of the current (2) of the 2 (f) pTC element U on the left side of the cross-sectional area reduction 胄22d in the figure. The total area h, i2 of the current 丨丨, i2, i3, i4 flowing to the pTc element ii is obtained by the cross-sectional area reducing portions 2〇c, 22c of the terminal portions 2, 22 of the terminal blocks 2, 22 , i3, i4 flow.

例如，在居里溫度為26〇t：、電阻值為100Ω之4個pTC 兀件丨1沿端子板20，22之主要部20a，22a排列，額定 1200W(額定電流12A)之pTC裝置1〇中，當最大為2〇a之突入電流流動時’即使將設於端子板2〇, 22之抽出端部2〇b 22b側之截面積減少部2〇c，22c的容許電流設定成3〇A，亦可將設於端子板20，22之主要部20a, 22a之截面積減少部20d, 22d的容許電流設定成其一半之15A。在將組裝有此種PTC裝置10之機器，連接於設置有 20A之斷路器的100V系統配電盤時，如以往僅以設於端子板2 0，2 2之抽出端部2 0 b，2 2 b側之截面積減少部2 〇 c 22c(容許電流30A)，在異常過電流流至PTC裝置10時，2〇八之斷路器或設於機器之20A玻璃管保險絲會先阻斷異常過電流，但藉由將截面積減少部20d，22d設於端子板20，22 之主要部20a, 22a，在異常過電流流至PTC裝置10時，截面積減少部20d, 22d會較20A之斷路器或設於機器之 20A玻璃管保險絲先阻斷異常過電流。藉此，由於能以更小之電流阻斷，因此可更安全阻斷異常過電流。 <實施例2 >截面積減少部只要是在相鄰接之PTC元件之間，則無論設在何處皆可降低容許電流。例如，如圆 14 200903528For example, a pTC device 1 having a Curie temperature of 26 〇t: and a resistance value of 100 Ω is arranged along the main portions 20a, 22a of the terminal blocks 20, 22, and a pTC device rated at 1200 W (rated current 12 A) is used. In the case where the inrush current of the maximum of 2〇a flows, the allowable current of the cross-sectional area reducing portions 2〇c, 22c on the side of the extraction end portion 2〇b 22b of the terminal block 2〇22 is set to 3〇. A, the allowable current of the cross-sectional area reducing portions 20d, 22d provided in the main portions 20a, 22a of the terminal blocks 20, 22 may be set to 15A of half thereof. When the machine in which the PTC device 10 is assembled is connected to a 100V system switchboard provided with a 20A circuit breaker, as in the prior art, only the extraction end portion 2 0 b, 2 2 b provided on the terminal block 20, 2 2 The side cross-sectional area reduction unit 2 〇c 22c (allowable current 30A), when an abnormal overcurrent flows to the PTC device 10, the circuit breaker of the 2-8 or the 20A glass tube fuse provided in the machine first blocks the abnormal overcurrent. However, by providing the cross-sectional area reducing portions 20d, 22d to the main portions 20a, 22a of the terminal blocks 20, 22, when an abnormal overcurrent flows to the PTC device 10, the cross-sectional area reducing portions 20d, 22d are smaller than the 20A circuit breaker or The 20A glass tube fuse set on the machine first blocks abnormal overcurrent. Thereby, the abnormal overcurrent can be blocked more safely because it can be blocked with a smaller current. <Embodiment 2> As long as the cross-sectional area reducing portion is between adjacent PTC elements, the allowable current can be lowered regardless of where it is placed. For example, as a circle 14 200903528

8所不，沿端子板4〇排列之PTC元件1 1中，在將截面積減少部4〇x形成於圖中左側相鄰接之PTC元件11X，丨i γ 之間日寸，則僅藉由流過圖中最左側之PTC元件1 1 χ之電流，即可决疋戴面積減少部40x之容許電流。亦即，相對於實她例1中針對分別流至2個PTC元件之電流的合計來檢測阻斷異g過電流，實施例2可針對流至PTC元件n X 之電流來檢測阻斷異常過電流。因此，可進一步提高安全性。In the PTC element 1 1 which is arranged along the terminal block 4, the cross-sectional area reducing portion 4〇x is formed in the PTC element 11X adjacent to the left side in the drawing, and 丨i γ is between the day and the inch, and only borrows By the current flowing through the leftmost PTC element 1 1 图 in the figure, the allowable current of the wearing area reducing portion 40x can be determined. That is, the blocking abnormal g overcurrent is detected with respect to the total of the currents flowing to the two PTC elements in the first example, and the second embodiment can detect the blocking abnormality for the current flowing to the PTC element n X . Current. Therefore, the safety can be further improved.

<實施例3 ：>如圖9之俯視圖所示，挾持PTC元件1 i A 對h子板5 0，5 2，與習知例同樣地除了主要部，與抽出知部50b，52b間之截面積減少部50c，52c 以外，於所有鄰接之PTC元件UA，UB, uc，之間，設有截面積減少部5Gd，5Ge，谢；52d，52e，训端子板％ ; 52之截面積減少部5Qe，5Qd，*，谢；叫5冰私以，係形f為離抽出端部5〇b，52b愈遠則寬度（橫截面）愈小， \ 使今許電机變小。例如，依從抽出端部5〇b，5孔起之順序’將截面積減少部5〇C，52c之容許電流設為24A，將截 :積減少部50d，52d之容許電流設為l8A，將截面積減少之今許電流设為12A，將截面積減少部5〇f，52f 之容許電流設為6A。 ^ 十對PTC 70件】1 A在異常過電流流過時，截面 ^少部抓即炫斷，針對pTC元件UB在異常過電流流 =夺’截面積減少部恥戈5〇e即炼斷，針對prc元件Μ "常過電流流過時，截面積減少部W即炼斷， 15 200903528 針對PTC元件11D在異常過電即熔斷。流流過時，戴面積減少部 50f 田於熔斷之部分增部熔斷’因此可更進一步提高安全性〈實驗例> 如圖1〇之俯視圖所示，準備具有主要部… 似與抽出端部嶋，82b之不鏽鋼端子板8〇, 82。如圖，所示，以於抽出端部80b側設有容許電流為ΜΑ之截面減少部80x的端子板8〇為古式；1。上π 丁极川馮忒樣1。如圖1〇(b)所示，以於主要部82a之中央設有容許電流為、 Λ <戳面積減少部82χ 的端子板82為試樣2。<Embodiment 3:> As shown in the plan view of Fig. 9, the PTC element 1 i A is held by the PTC element 1 i A in the same manner as the conventional example except for the main portion and the extraction portion 50b, 52b. In addition to the cross-sectional area reducing portions 50c and 52c, cross-sectional area reducing portions 5Gd, 5Ge, Xie; 52d, 52e, training terminal plate %; 52 cross-sectional area are provided between all adjacent PTC elements UA, UB, uc. Reduction part 5Qe, 5Qd, *, Xie; called 5 ice private, the shape f is from the extraction end 5〇b, the farther 52b is the smaller the width (cross section), \ make the current motor smaller. For example, the allowable current of the cross-sectional area reducing portions 5〇C and 52c is set to 24A in accordance with the order of the 5th hole, and the allowable current of the cut-off product reducing portions 50d and 52d is set to 18A. When the cross-sectional area is reduced, the current is set to 12 A, and the allowable current of the cross-sectional area reducing portions 5 〇 f and 52 f is set to 6 A. ^ Ten pairs of PTC 70 pieces] 1 A When the abnormal overcurrent flows, the cross section is less than the part of the slash, and the abnormal current flow of the pTC element UB is reduced. For the prc component Μ " often overcurrent flow, the cross-sectional area reduction part W is refining, 15 200903528 for the PTC element 11D is abnormally over-powered and blown. When the flow is passed, the wearing area reducing portion 50f is melted in the portion where the melting portion is melted, so that the safety can be further improved. <Experimental Example> As shown in the top view of Fig. 1, the main portion is prepared and the end portion is extracted. , 82b stainless steel terminal block 8 〇, 82. As shown in the figure, the terminal plate 8A having the cross-section reducing portion 80x having the allowable current ΜΑ on the side of the drawing end portion 80b is an ancient type; On the π Ding Chichuan Feng Yi sample 1. As shown in Fig. 1(b), the terminal plate 82 having the allowable current and the 戳 <poke area reducing portion 82A in the center of the main portion 82a is the sample 2.

針對試樣i、2分別沿端子板8〇, 82之主要部心，… 排列4個PTC元件11A〜nD並予以挾持，以構成丽用、額定電流為12A之PTC裝置。針對試樣卜2分別使附斜線之-個PTC元件11C短路，以調查截面積減少部㈣ 82乂在10秒以内熔斷之電流的大小。測量結果如以下表卜結果容許電流（A) 溶斷雷湳ΓΑ、試樣1 25A 55 A 試樣2 12A 24AFor the samples i and 2, four PTC elements 11A to 11D are arranged along the main cores of the terminal plates 8 and 82, respectively, and are held to constitute a PTC device having a rated current of 12 A. Each of the PTC elements 11C with a diagonal line was short-circuited for the sample 2 to investigate the magnitude of the current that was blown within 10 seconds by the cross-sectional area reducing portion (4). The measurement results are as shown in the following table. Results Allowable current (A) Dissolved Thunder, Sample 1 25A 55 A Sample 2 12A 24A

[表1] 從表1可知，試樣2較試樣1以更小之電流熔斷。亦即，試樣2將截面積減少部設於較試樣丨更離開抽出電極部之位置，由於實質流動之電流只要滿足PTC元件 11C及UD之容許電流即可，因此可縮小截面積減少部之 16 200903528 截面積。藉此熔斷電流本身亦可降低。 — <總結 > 如以上說明，針對挾持PTC元件之端子板，藉；相鄰接之PTC元件之間設置截面積減少部，即可降低因異常過電流㈣斷之截面積減少部的容許電流。上外，本發明並不限於上述實施形態，可加上各種變 /貝包例如，雖例不一對端子板之抽出端部彼此配置於相反側之情形，但亦可設成一對端子板之抽出端部配置於相同側之構成。X，形成於PTC元件表面之外部電極，未必須為兩層’亦可使用將一層外部電極形成於PT 之端子板側之整體表面者。【圖式簡單說明】圖1係表示於端子板間挾持PTC元件的狀態視圖，（b)係前視圖，⑷係仰視圖。糸侮圖2係PTC裝置的截面圖。圖3係表示PTC裴置之使用狀態的方塊圖。圖4係PTC裝置的截面圖。（實施例υ 圖5(a)係沿圖4之線Α—Α觀察的俯視圖，（b)亡圖4之線B — B觀察的俯視圖。（實施例1) 系洽圖6係PTC裝置的要部構成圖。（實施例” 圖7係圖4之線c 一 c觀察的截面圖。（實施例1) 圖8係端子板的俯視圖。（實施例2) 圖9係端子板的俯視圖。（實施例3) 圖1 〇係端子板的俯視圖。（實驗例） 17 200903528 【主要元件符號說明】 10 PTC裝置 1 1，1 1A〜1 1D，1 IX，1 1 Y PTC 元件 20 端子板 20c, 20d 截面積減少部 22 端子板 22c, 22d 截面積減少部 40 端子板 40x 截面積減少部 50 端子板 50c〜50f 截面積減少部 52 端子板 52c〜52f 截面積減少部 80 端子板 80x 截面積減少部 82 端子板 82x 截面積減少部 18[Table 1] As is clear from Table 1, Sample 2 was blown at a smaller current than Sample 1. In other words, in the sample 2, the cross-sectional area reducing portion is provided at a position further away from the extraction electrode portion than the sample yoke, and since the current flowing substantially satisfies the allowable current of the PTC element 11C and the UD, the cross-sectional area reduction portion can be reduced. 16 200903528 Cross-sectional area. Thereby, the fuse current itself can also be reduced. — <Summary> As explained above, for the terminal plate holding the PTC element, by providing the cross-sectional area reduction portion between the adjacent PTC elements, the tolerance of the cross-sectional area reduction portion due to the abnormal overcurrent (4) can be reduced. Current. Further, the present invention is not limited to the above-described embodiment, and various types of change/belt packs may be added. For example, the case where the extraction end portions of the pair of terminal plates are not disposed on the opposite side may be used, but a pair of terminal plates may be provided. The extraction ends are arranged on the same side. X, the external electrode formed on the surface of the PTC element, does not have to be two layers'. It is also possible to use an external electrode formed on the entire surface of the terminal plate side of the PT. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing a state in which a PTC element is held between terminal plates, (b) is a front view, and (4) is a bottom view.糸侮 Figure 2 is a cross-sectional view of the PTC device. Fig. 3 is a block diagram showing the state of use of the PTC device. 4 is a cross-sectional view of a PTC device. (Embodiment υ Fig. 5(a) is a plan view taken along line Α-Α of Fig. 4, and (b) is a plan view of line B-B of Fig. 4 (Embodiment 1) Fig. 6 is a PTC device Fig. 7 is a cross-sectional view taken along line c-c of Fig. 4. (Embodiment 1) Fig. 8 is a plan view of a terminal block. (Embodiment 2) Fig. 9 is a plan view of a terminal block. (Embodiment 3) Fig. 1 is a plan view of a lanthanide terminal plate. (Experimental example) 17 200903528 [Description of main components] 10 PTC device 1 1,1 1A to 1 1D, 1 IX, 1 1 Y PTC element 20 terminal block 20c 20d cross-sectional area reducing portion 22 terminal block 22c, 22d cross-sectional area reducing portion 40 terminal plate 40x cross-sectional area reducing portion 50 terminal plate 50c to 50f cross-sectional area reducing portion 52 terminal plate 52c to 52f cross-sectional area reducing portion 80 terminal plate 80x cross-sectional area Reduction portion 82 terminal plate 82x cross-sectional area reduction portion 18

Claims

200903528 X. Patent application scope: A PTC device has: one pair of terminal plates facing each other; and a plurality of PTC components arranged along the pair of terminal plates in a row, and held; / between the terminal plates and An electric parallel connection is formed between the pair of terminal plates; the extracted end portions of the pair of terminal plates are respectively connected to the power source, wherein: the pair of terminal plates are formed between the adjacent PTC elements at least adjacent to the PTC element, and the cross-sectional area is formed. Partially smaller cross-sectional area reduction. 2. In the PTC I set, in #1 of the patent application scope, the pair of terminal plates are between the extraction end portion and the PTC element located closest to the extraction end side, and between the plurality of PTC elements Among them, the cross-sectional area reducing portion is formed at a force of 2 or more; the cross-sectional area of the position farther away from the extracted end portion is reduced, and the cross-sectional area is smaller. 3. The PTC device of claim i or 2, wherein the pair of terminal plates are respectively between the extraction end and the PTC element located closest to the extraction end side, and all of the plurality of PTCs The cross-sectional area reducing portion is formed between the elements; and the cross-sectional area reducing portion at a position farther from the extracted end portion has a smaller cross-sectional area. 4. The PTC device of claim 帛i or 2, wherein at least one of the PTC components adjacent to each other is disposed between the PTC component and the terminal plate A spacer separated by a cross-sectional area reduction portion. 5. The PTC device according to item 3 of the patent application scope, wherein the PTC device is disposed between at least one of the PTC elements adjacent to each other, and the PTC element is disposed between the Phillips 1 dry & 19 200903528 A spacer separated from the wearing area of the terminal block. The PTC device of claim 1 or 2, wherein the section of the 5th terminal plate is 穑, 、, 立々 v v 4 4 , , , , , , , , , , IL IL IL IL IL IL IL Extract the rated current of the end and the overcurrent protection part of the electric. 7. The PTC device of claim 3, wherein the allowable current of the cross-sectional area reducing portion of the terminal block is smaller than the rated value of the overcurrent protection component connected between the extracted end portion of the terminal block and the power source. Current. 8. The PTC device of claim 4, wherein the allowable current of the cross-sectional area reducing portion of the terminal block is smaller than the rated value of the overcurrent protection component connected between the extracted end portion of the terminal block and the power source. Current. 9. The PTC device of claim 5, wherein the allowable current of the cross-sectional area reducing portion of the terminal plate is smaller than the rated value of the overcurrent protection component connected between the extracted end portion of the terminal plate and the power source. Current ° XI, schema: as the next page 20