1294326 .7l、發明說明： . 【發明所屬之技術領域】 本發明係關於-種電烙鐵’尤指—種節能電烙鐵。 【先前技術】 電烙鐵是電子組裝時最常用工具之一，用於焊接、維修及更換 絲件等。電烙鐵有普通電烙鐵、調溫式電烙鐵、恒溫電烙鐵等幾 SMD(Surface Mount Device ^ 鲁修SMD時要求烙鐵頭溫度恒定，否則會讀傷元器件，甚至會損傷 夕層印刷電路板，因此在這種情況下應使用恒溫電絡鐵。 請參閱第-圖，習知之恒溫電烙鐵包括一烙鐵頭1〇，、一電源 供應電路20’、一控制該烙鐵頭1〇，之電流之控制晶片3〇，、一電阻 R8及一溫度控制器40’，該電源供應電路2〇，包括一變壓器B1，， 電烙鐵工作時在該變壓器B1，初級獲得22〇伏交流電壓，其次級經 過變壓得到24伏交流電壓，其次級第一端與一二極體D1，陽極連 • 接，該二極體D1’陰極透過一電容C1，與該變壓器B1，次級第二端 連接，該二極體D1’陰極依次連接一電阻R7，及一穩壓二極體D2, 陰極，該穩壓二極體D2’陽極透過一電容C2,與該變壓器Bi，次級 第二端連接，該變壓器ΒΓ次級第一端與該烙鐵頭1〇，一端連接， 該變壓器ΒΓ次級第二端透過該控制晶片3〇,與該烙鐵頭1〇,另一端 連接，該控制晶片30’一訊號接收端透過該電阻r8,與該溫度控制 器40’連接。在該恒溫電烙鐵工作時，該控制晶片3〇，透過該電阻 R8’接收該溫度控制器4〇’之控制訊號，以此經過調節該烙鐵頭ι〇, 1294326 ‘ 之電流來控制該恒溫電烙鐵之開斷和改變其發熱功率。 電烙鐵一般不是連續性工作，總會有停歇時間，若不關閉電 源，在此段時間内電烙鐵依然處於發熱狀態，這不僅浪費電能，而 且會降低電烙鐵使用壽命。如果立即關閉電源，電烙鐵會馬上冷 卻，在不久後又需要使用電烙鐵時，需要重新預熱，同樣浪費電能 亦不便於使用。 因是，實有必要對習知之電烙鐵進行改良，以消除上述缺失。 ，【發明内容】 蓥於以上内容，有必要提供一種節能電烙鐵，可在電烙鐵不使 用一段時間過後自動關閉電源，節約電能。 一種節能電烙鐵，其包括一烙鐵頭、一電源供應電路、一控制 晶片、一電阻R8及一溫度控制器，該電源供應電路包括一變壓器， 該變壓器次級第一端與該烙鐵頭一端連接，該變壓器次級第二端透 過該控制晶片與該烙鐵頭另一端連接，該控制晶片包括一訊號接收 .端，該溫度控制器與該電阻R8連接，該訊號接收端與該電阻R8 間接有一延時電路。 相較習知技術，該節能電烙鐵之溫度控制器與控制晶片之間接 入一延時電路，在超過延時時間後電烙鐵自動關閉電源，節省了電 能。 — 【實施方式】 請參閱第二圖，本發明之較佳實施方式節能電烙鐵包括—格鐵 碩10、-電源供應電路20、一控制晶片30、一溫度控制器4〇、一 7 ⑧ 1294326 •- 電阻R8及一延時電路50。該電源供應電路20包括一變壓器B1， * 該變壓器B1次級産生一 24伏交流電，其次級第一端與一二極體 D1陽極連接，該二極體D1陰極透過一電容C1與該變壓器B1次 級第二端連接，該二極體D1陰極依次連接一電阻R7及一穩壓二 極體D2陰極，該穩壓二極體D2陽極透過一電容C2與變壓器B1 次級弟^一連接’該24伏交流電壓經過整流、遽波、穩壓後在該 穩壓二極體D2陽極得到一+5伏直流電壓，該變壓器B1次級第一 鲁 端與該烙鐵頭10 —端連接，該變壓器B1次級第二端透過該控制晶 片30與該烙鐵頭1〇另一端連接。 該延時電路50包括一輸入電壓，該輸入電壓可自該穩壓二極 體D2 1%極接入，也可由一外部直流電壓源提供，且該輸入電壓一 般爲+5伏直流電壓，該輸入電壓透過一電阻R1與一電容C3串聯 接入該變壓器B1次級第二端，該電容C3兩端並聯接入一開關κ， 該電阻R1與該電容C3之節點與一反向器51輸入端連接，該反向 # 器51輸出端透過一電阻R2與該輸入電壓連接，該反向器51輸出 端還與一延時器52輸入端連接，該延時器52輸出端透過一電阻 R3與該輸入電壓連接，該延時器52輸出端還與一反及閘^第一 輸入端連接，該反及閘53第二輸入端與該反向器51輸出端連接， 該反及閘53輸出端透過一電阻R4與該輸入電壓連接，同時該反及 閘53輸出端接入一開關電路。 該開關電路包括一第—NM〇s電晶體M1、一第：NM〇s電 晶體M2、一第三NM〇S電晶體M3及一上拉電阻R6,該第一NM〇s1294326 .7l, invention description: [Technical Field] The present invention relates to a type of electric iron, especially an energy-saving electric iron. [Prior Art] Soldering iron is one of the most commonly used tools for electronic assembly, for welding, repairing and replacing wire parts. There are several SMDs in the electric soldering iron, such as ordinary electric soldering iron, thermostatic electric soldering iron, thermostatic electric soldering iron, etc. (Surface Mount Device ^ Lu Xun SMD requires the soldering iron head to have a constant temperature, otherwise it will read the damaged components and even damage the printed circuit board. Therefore, in this case, thermostatic electric iron should be used. Please refer to the figure - the conventional constant temperature electric soldering iron includes a soldering iron tip 1 , a power supply circuit 20 ′, and a control of the soldering iron 1 〇, the current The control chip 3A, a resistor R8 and a temperature controller 40', the power supply circuit 2A, comprising a transformer B1, when the soldering iron is working, the transformer B1, the primary obtains 22 volts AC voltage, and the secondary pass Transforming to obtain 24 volts AC voltage, the secondary first end is connected to a diode D1, the anode is connected, and the cathode of the diode D1' is transmitted through a capacitor C1 to be connected to the transformer B1 and the second secondary end. The diode D1' cathode is sequentially connected to a resistor R7, and a voltage stabilizing diode D2, a cathode, and the anode of the Zener diode D2' is transmitted through a capacitor C2, and is connected to the transformer Bi and the second secondary end. Transformer ΒΓ secondary first end and the The first end of the transformer is connected to the second end of the transformer, and the second end of the transformer is connected to the control chip 3, and the other end of the solder chip is connected to the other end. The control chip 30' receives a signal through the resistor r8. The temperature controller 40' is connected. When the constant temperature soldering iron is in operation, the control chip 3〇 receives the control signal of the temperature controller 4〇 through the resistor R8', thereby adjusting the soldering iron head, 1294326' The current is used to control the breaking of the constant temperature soldering iron and change its heating power. The soldering iron is generally not continuous, and there will always be a rest time. If the power is not turned off, the soldering iron is still in a fever state during this period. It wastes power and reduces the service life of the soldering iron. If the power is turned off immediately, the soldering iron will cool immediately. When the soldering iron needs to be used soon, it needs to be reheated, which also wastes power and is not easy to use. It is necessary to improve the conventional soldering iron to eliminate the above-mentioned defects. [Inventive content] In view of the above, it is necessary to provide an energy-saving soldering iron, which can be The soldering iron does not automatically turn off the power after a period of time to save power. An energy-saving soldering iron includes a soldering iron head, a power supply circuit, a control chip, a resistor R8 and a temperature controller, the power supply circuit including a transformer, The secondary end of the transformer is connected to one end of the soldering iron, and the second end of the transformer is connected to the other end of the soldering iron through the control chip. The control chip includes a signal receiving end, the temperature controller and the resistor The R8 is connected, and the signal receiving end and the resistor R8 have a delay circuit indirectly. Compared with the prior art, a delay circuit is connected between the temperature controller of the energy-saving soldering iron and the control chip, and the soldering iron automatically turns off after the delay time is exceeded. [Embodiment] Referring to the second embodiment, an energy-saving soldering iron according to a preferred embodiment of the present invention includes a grid metal 10, a power supply circuit 20, a control chip 30, and a temperature controller 4 , a 7 8 1294326 •- resistor R8 and a delay circuit 50. The power supply circuit 20 includes a transformer B1, * the transformer B1 generates a 24 volt alternating current, the secondary first end is connected to a diode D1 anode, and the diode D1 cathode passes through a capacitor C1 and the transformer B1. The secondary second end is connected, and the cathode of the diode D1 is sequentially connected with a resistor R7 and a cathode of the Zener diode D2, and the anode of the Zener diode D2 is connected to the secondary of the transformer B1 through a capacitor C2. The 24 volt AC voltage is rectified, chopped, and stabilized to obtain a +5 volt DC voltage at the anode of the Zener diode D2, and the secondary first end of the transformer B1 is connected to the end of the soldering iron 10, The secondary second end of the transformer B1 is connected to the other end of the soldering iron tip 1 through the control wafer 30. The delay circuit 50 includes an input voltage that can be input from the 1% pole of the Zener diode D2 or an external DC voltage source, and the input voltage is typically a +5 VDC voltage. The voltage is connected in series through a resistor R1 and a capacitor C3 to the second secondary end of the transformer B1. The capacitor C3 is connected in parallel with a switch κ, the resistor R1 and the node of the capacitor C3 and an input of the inverter 51. The output of the inverter 51 is connected to the input voltage through a resistor R2. The output of the inverter 51 is also connected to an input terminal of the delay device 52. The output of the delay device 52 is transmitted through a resistor R3 and the input. The voltage connection, the output of the delay device 52 is also connected to a first input end of the opposite gate, the second input end of the opposite gate 53 is connected to the output end of the inverter 51, and the output end of the opposite gate 53 is transmitted through a The resistor R4 is connected to the input voltage, and the output of the opposite gate 53 is connected to a switching circuit. The switching circuit includes a first NM〇s transistor M1, a first: NM〇s transistor M2, a third NM〇S transistor M3, and a pull-up resistor R6, the first NM〇s
8 1294326 a曰曰體Ml閘極與該反及閘53輸出端連接，該第一 nm〇s電晶體 Ml没極透過一電阻把與該輸入電壓連接，該第一 NM〇s電晶體 Ml沒極還與該第二NM〇s電晶體M2閘極連接，該第一醒⑽ 電晶體Ml源極與該第二NM〇s電晶體M2源極連接後接入該變壓 态B1次級第二端，該第二NM〇s電晶體M2汲極與該第三nm〇s 電晶體M3閘極連接，且該第三NM〇s電晶體⑽閘極與没極間接 入该上拉電阻R6，該第三NM〇s電晶體M3汲極與該上拉電阻R6 馨 之節點接入該控制晶片30訊號接收端，該第三NMOS電晶體M3 源極與該電阻R8連接。 在該節能電烙鐵處於正常工作時，該開關κ處於斷開狀態，此 時該反向益51輸入端爲高電平，經該反向器51反向後在輸出端變 爲低電平，該反及閘53第二輸入端接收該低電平訊號後，無論此 4該反及閘53第一輸入端電平如何在該反及閘53輸出端輸出均爲 高電平，該高電平導致該第一 NMOS電晶體Ml導通，此時該第 籲一 NMOS電晶體Ml汲極爲低電平，該第二NM0S電晶體M2斷 開’第二NMOS電晶體M2没極經該上拉電阻R6上拉到高電平後 k供給該第二NMOS電晶體M3閘極，此處加入該上拉電阻Rg之 目的係因爲該溫度控制器40送出控制訊號電壓經過該電阻R8後在 該第二NMOS電晶體M3源極大約是7伏左右，所以爲使該第三 NMOS電晶體M3導通必須將該第三NMOS電晶體M3閘極電平 上拉到7伏以上。此時該第三NMOS電晶體M3導通，該溫度控 制器40控制訊號傳送入該控制晶片30訊號接收端。 9 ⑧ 1294326 ‘ 當暫時不需要使用電烙鐵時，合上該開關Κ，該反向器51輸 ‘ 入端連接該變壓器Β1次級第二端變爲低電平，經過該反向器51 後變爲高電平送入該延時器52輸入端，該反及閘53第二輸入端接 收該高電平訊號，此時該反及閘53第一輸入端由於延時時間未到 依然保持原始狀態爲低電平，在該反及閘53輸出端輸出爲高電平， 所以該第三NMOS電晶體導通，電烙鐵依然正常工作。當超過延 時日守間（假設爲5分鐘），仍然不需要使用電烙鐵時，該延時器52 鲁 輸入端之高電平傳送到輸出端並接入到該反及閘53第一輸入端， 此時該反及閘53輸出端爲低電平（即該第一 NM〇s電晶體M1閘 極爲低電平），該第一 NMOS電晶體Ml處於斷開狀態，汲極爲 +5伏高電平，該高電平使該第二NM〇s電晶體M2導通，則該第 二NMOS電晶體M3閘極爲低電平，所以該第三NM〇s電晶體 M3斯開，該溫度控制器4〇控制訊號不能傳送入該控制晶片兕訊 號接收端，此時電烙鐵不工作。若在延時時間内（此時電烙鐵仍然 修處於工作狀態）或超過延時時間（此時電烙鐵不工作）需要使用電 烙鐵時，斷開該開關K，該反向器51輸入端馬上變爲高電平，該 反向器51輸出端變爲低電平並傳送入該反及閘53第二輸入端，該 反及閘53輸出端（即該第一 NM〇s電晶體M1閘極）變爲高電平， 該第三NMOS電晶體M3導通，電烙鐵正常工作。 综上所述，本發明符合發明專利要件，爰依法提出專利申請。 惟，以上該者僅為本發明之較佳實施方式，舉凡熟悉本案技藝之人 士，在爰依本發明精神所作之等效修飾或變化，皆應涵蓋於以下之 1294326 申請專利範圍内。 【圖式簡單說明】 第一圖係習知電烙鐵之電路圖。 第二圖係本發明之較佳實施方式節能電烙鐵之電路圖。 【主要元件符號說明】 [習知] 烙鐵頭 10， 電源供應電路 20, 控制晶片 30， 溫度&制器 40, 變壓器 B1， 二極體 D1， 穩壓二極體 D2， 電容 Cl，、C2， 電阻 R7,、R8， [本發明1 烙鐵頭 10 電源供應電路 20 控制晶片 30 溫度控制器 40 延時電路 50 反向器 51 開關 K 延時器 52 反及閘 53 二極體 D1 穩壓二極體 D2 變壓器 B1 第一 NMOS電晶體 Ml 第二NMOS電晶體 M2 第三NMOS電晶體 M3 電容 Cl、 C2、C3 電阻 R1、 R2、R3、R4、R5、R6、R7 R88 1294326 a body M1 gate is connected to the output of the opposite gate 53. The first nm〇s transistor M1 is connected to the input voltage through a resistor, and the first NM〇s transistor M1 is not The pole is also connected to the gate of the second NM〇s transistor M2, and the source of the first wake-up (10) transistor M1 is connected to the source of the second NM〇s transistor M2 and is connected to the transformed state B1 The second end of the second NM〇s transistor M2 is connected to the gate of the third nm〇s transistor M3, and the third NM〇s transistor (10) is connected to the pull-up resistor R6 between the gate and the gate. The third NM〇s transistor M3 drain and the pull-up resistor R6 are connected to the control chip 30 signal receiving end, and the third NMOS transistor M3 source is connected to the resistor R8. When the energy-saving soldering iron is in normal operation, the switch κ is in an off state, and at this time, the input terminal of the reverse benefit 51 is at a high level, and after being reversed by the inverter 51, the output terminal is turned to a low level. After the second input terminal of the gate 53 receives the low level signal, regardless of the level of the first input terminal of the reverse gate 53, the output of the opposite gate 53 is high level, the high level The first NMOS transistor M1 is turned on. At this time, the first NMOS transistor M1 汲 is at a low level, and the second NMOS transistor M2 is turned off. The second NMOS transistor M2 is not passed through the pull-up resistor R6. After being pulled up to a high level, k is supplied to the gate of the second NMOS transistor M3. The purpose of adding the pull-up resistor Rg here is because the temperature controller 40 sends a control signal voltage through the resistor R8 after the second NMOS. The source of the transistor M3 is about 7 volts, so in order to turn on the third NMOS transistor M3, the gate level of the third NMOS transistor M3 must be pulled up to 7 volts or more. At this time, the third NMOS transistor M3 is turned on, and the temperature controller 40 controls the signal to be transmitted to the signal receiving end of the control chip 30. 9 8 1294326 'When the soldering iron is not needed for the time being, close the switch Κ, the inverter 51 is connected to the transformer and the secondary second terminal is turned low. After the reverser 51 The high level is sent to the input end of the delay device 52, and the second input end of the anti-gate 53 receives the high level signal. At this time, the first input end of the anti-gate 53 remains in the original state due to the delay time. Low level, the output of the anti-gate 53 output is high, so the third NMOS transistor is turned on, and the soldering iron is still working normally. When the delay time is exceeded (assumed to be 5 minutes), and the soldering iron is still not needed, the high level of the delay input of the delay device 52 is transmitted to the output terminal and is connected to the first input end of the anti-gate 53. At this time, the output of the anti-gate 53 is at a low level (that is, the first NM〇s transistor M1 is extremely low), the first NMOS transistor M1 is in an off state, and the 汲 is extremely +5 volts high. Ping, the high level turns on the second NM〇s transistor M2, then the second NMOS transistor M3 gate is extremely low, so the third NM〇s transistor M3 is turned on, the temperature controller 4 The control signal cannot be transmitted to the control chip receiving terminal, and the soldering iron does not work. If the soldering iron is used during the delay time (when the soldering iron is still working) or when the delay time (when the soldering iron does not work), the switch K is turned off, and the input of the inverter 51 is immediately changed. High level, the output of the inverter 51 becomes low level and is transmitted to the second input end of the opposite gate 53. The output of the opposite gate 53 (ie, the first NM〇s transistor M1 gate) When it becomes high level, the third NMOS transistor M3 is turned on, and the soldering iron works normally. In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above is only a preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art of the present invention in the spirit of the present invention are intended to be included in the following Patent Application No. 1294326. [Simple description of the diagram] The first diagram is a circuit diagram of a conventional soldering iron. The second figure is a circuit diagram of an energy-saving soldering iron of a preferred embodiment of the present invention. [Explanation of main component symbols] [Practical] Tip 10, power supply circuit 20, control chip 30, temperature & conditioner 40, transformer B1, diode D1, voltage regulator diode D2, capacitor Cl, C2 , resistor R7,, R8, [The present invention 1 tip 10 power supply circuit 20 control wafer 30 temperature controller 40 delay circuit 50 inverter 51 switch K delay 52 anti-gate 53 diode D1 regulator diode D2 transformer B1 first NMOS transistor M1 second NMOS transistor M2 third NMOS transistor M3 capacitor Cl, C2, C3 resistors R1, R2, R3, R4, R5, R6, R7 R8