1316448 九、發明說明： 【發明所屬之技術領域】 本發明主要係關於一種電飭 ,.电動棘輪扳手，尤指一種可藉 由充電式電池包充電，且具備 主人A 斷電安全防護設計以延長使 用♦叩的電動棘輪扳手。 【先前技術】 棘輪板手係一箱當用Ask ©c1316448 IX. Description of the Invention: [Technical Field] The present invention relates to an electric cymbal, an electric ratchet wrench, and more particularly to a battery pack that can be charged by a rechargeable battery pack and has a safety protection design for the owner A. Extend the use of ♦ 叩 electric ratchet wrench. [Prior Art] Ratchet wrench is a box when using Ask ©c
鎖緊或鬆開螺栓或螺帽的手j 具’除傳統的手動去夕卜，·^ 士、 '、有以氧動或電動驅動者，讓来 輪扳手能更快速地旋緊岑夢 41螺栓或螺帽，並能提供螺书 或螺糨更良好的緊密接合程度。 但由Μ用之電動棘輪板手於實際操作時，於最後海 緊或1始鬆開螺检或螺帽時扭力值最大，負載電流亦聋 一 ’右握持不緊，板手本體會因扭力太大而誤傷人體，肩 =的顧慮；但若握持太緊，則馬達易因負載電㈣ 而燒毀，縮短其使用壽命。 【發明内容】 ,因此，本發明人有鑑於習用棘輪扳手操作性能與安全 足一缺失，特經過不斷的試驗與研究，終於發展出 一種能改進習用缺失之本發明。 本發明主要目的’在於提供一種具斷電保護功能之充 電式電動棘輪扳手，係藉由斷電保護機制，在負載電流過 夺立刻停止運轉，以確保電動棘輪扳手不致因扭力過大 4 1316448 而誤傷人體。 為達成前述目的採取的主要技術手段係令前述且斷電 保護功能之充電式電動棘輪扳手係藉由一斷電保護裝置以 偵測一馬達的負載電流，並於負載電流超過設定範圍時， 由斷電保護裝置自動切斷馬達的電力供應，使馬達立即停 止運轉’避免馬達燒毀，以確保使用安全，並延長電動棘 輪扳手的使用壽命。 前述斷電保護裝置係設於馬達與電源之間，其包括. 一功率電晶體’其連接於馬達與其電源迴路之間； 一電流感測電路，係透過功率電晶體與馬達連接，以 - 感測馬達之負載電流； 一驅動控制電路，其分別連接電源與功率電晶體的 極； ？ 一電流中斷比較電路，其輸入端係與電流感測電路之 輸出端連接，以判斷負載電流是否大於一設定的參考值， 其輸出端則連接至驅動控制電路的控制端。 利用前述電路設計提供棘輪扳手之馬達一斷電保護功 能’在電源開始供應後，功率電晶體因閘極為高電位而導 通’馬達隨即ϋ電而運轉’纟此同時’電流感測電路將透 過功率電晶體感測馬達的負載電流是否大於比較電路的參 考值’如未超過，獅持馬達持續運轉，惟_旦負載電流 超過比較電路的參考值，比較電路隨即令開關電晶體導通 、’而使功率電晶體截止，從而使馬達停止運轉，以確保馬 達不致因過載而燒毀，而獲致斷電保護之目的。 、” 1316448 前述電流感測電路與比較電路的輸入端之間進一步設 有〜電流放大電路，用以將電流感測電路所感測之負载電 >;IL 4 3虎放大後送入比較電路。 刖述比較電路的另一輸入端設有一電流設定電路，以 設定斷電保護標準的負载電流大小。 【實施方式】 本發明主要係關於一種具斷電保護功能之充電式電動 棘輪扳手，請配合參看第—圖所示，本發明之棘輪板手主 要係包含有-本體（i 〇 ) A一結合於本體（χ 〇 ) 一端 之棘輪部（2 0 );其中： 端 …請參看第二、三圖所示，該本體（ι〇)主要係由兩 半殼體（11) (12)相互蓋合所構成，兩半殼體（1 、★旃（1 2)可藉由螺栓等元件來加以鎖合固冑，而於兩 ' (1 1 )( 1 2 )的相對内側間設置有兩亦呈半圓 形截面的絕緣片（1 3 2 ); 於兩半殼體/ )(1 2 )間共同容設有一馬達（ 14)及一充電式電池包（15)，電池包（…與馬 1 4 )間係呈電連接，以提供馬達（丄4 )運轉所需 的電源；於馬達（14) )與充電式電池包（15)設有一 ;R 1 9 )、一斷電保護裝置（3 〇 )以及一接電座（ 1)其中，馬達（1 4 )、開關（1 9 )、斷電保 »曼裝置（3 〇 )以及接電庙r ^ μ , 包座（1 5 2 )係包覆定位於兩絕 緣片（1 3 2 )間； 1316448 於該接電座（1 52)上設置有兩個用以與電池包（ 1 5 )之兩電極相接觸的接腳，該開g (丄9 )係與接電 座（152)及馬達（14)呈電性連接，藉此，可透過 開關（1 9 )來控制電池包（丄$ )與馬達（工4 )間的 通電與否’又’馬達（14)遠離電池包（丄5)的一端 Λ置有一輸出軸，於輸出軸上設置有一齒輪， 再於兩半殼體（11) (12)間設置有—穿出本體（1 ◦)的按#(192) ’並設置有一抵靠於按知 的彈簧（196)，如此當使用者按壓按紐（1 gg )時，能夠控制開關（丄9 )的開閉。 於兩半殼體（i工）（丄2 )間設置有一為馬達（上 4)以齒輪（142)所傳動的行星齒輪組（16)，藉 :仃星齒輪組（1 6 )的設置，可達到減速的效果；其中 卜ω輪、’且（16)主要係包含有一轉座（162)，於 座（1 6 2 )朝向馬達（1 4 )之一側設置有三個行奚 齒輪（Ί β β、 b) ’各行星齒輪（166)係與馬達（ι4 .出軸上的齒輪（1 42)相嚙合傳動，於轉座（1 6 ^異於朝向馬達（1 4 )之-側形成有-傳動齒（工6 』述的行星齒輪組（1 6 )冑-步包含有一用以容f 68) 及行星齒輪（16Θ)於其中的齒環（1 (1 於1221環（1 68)的内面形成有一與各行星齒轉 、 6)相喃合的内齒部’該齒環（168)的一端係 以外螺紋螺^主 嘴接、，、°合於一連接頭（1 7 )之内螺紋面，另〆 1316448 端係螺接於一設於齒環（1 6 8 )與半殼體（i t )( 2)之間而形成定位的定位環（l44)。The hand j that locks or loosens the bolt or nut has 'except for the traditional manual trip, ·^, ', with oxygen or electric drive, let the wheel wrench tighten the nightmare 41 more quickly Bolts or nuts and provide a better degree of tight engagement of the snail or thread. However, due to the actual operation of the electric ratchet wrench, the torque value is the largest when the final sea is tight or the screw or nut is loosened at the beginning, and the load current is also not right. The right hand is not tight. Torque is too big to accidentally hurt the human body, shoulder = worry; but if the grip is too tight, the motor is easily burned due to load electric (four), shortening its service life. SUMMARY OF THE INVENTION Therefore, the present inventors have finally developed a present invention which can improve the conventional use in view of the lack of operational performance and safety of the conventional ratchet wrench. The main purpose of the present invention is to provide a rechargeable electric ratchet wrench with a power-off protection function, which is stopped immediately after the load current is over by the power-off protection mechanism, so as to ensure that the electric ratchet wrench is not injured due to the excessive torque of 4 1316448. human body. The main technical means adopted to achieve the above purpose is to enable the above-mentioned power-saving electric power ratchet wrench to detect the load current of a motor by a power-off protection device, and when the load current exceeds the set range, The power-off protection device automatically cuts off the power supply to the motor and stops the motor immediately. 'Avoid the motor from burning, to ensure safe use and extend the service life of the electric ratchet wrench. The power-off protection device is disposed between the motor and the power source, and includes: a power transistor 'connected between the motor and the power circuit thereof; a current sensing circuit connected to the motor through the power transistor, with a sense Measuring the load current of the motor; a drive control circuit, which is respectively connected to the pole of the power supply and the power transistor; A current interrupt comparison circuit has an input terminal coupled to the output of the current sensing circuit to determine whether the load current is greater than a set reference value, and an output terminal coupled to the control terminal of the drive control circuit. The above circuit design provides a ratchet wrench motor with a power-off protection function. After the power supply is started, the power transistor is turned on because the gate is extremely high. The motor then runs and is powered. At the same time, the current sensing circuit will transmit power. If the load current of the transistor sensing motor is greater than the reference value of the comparison circuit, if the lion holding motor continues to run, if the load current exceeds the reference value of the comparison circuit, the comparison circuit then turns the switching transistor on, The power transistor is turned off, so that the motor is stopped, so as to ensure that the motor is not burnt due to overload, and the power-off protection is achieved. 1316448 The current sensing circuit and the input end of the comparison circuit are further provided with a current amplifying circuit for amplifying the load current sensed by the current sensing circuit, and the IL 4 3 is amplified and sent to the comparison circuit. The other input end of the comparison circuit is provided with a current setting circuit for setting the load current of the power-off protection standard. [Embodiment] The present invention mainly relates to a charging type electric ratchet wrench with a power-off protection function, please cooperate Referring to the first figure, the ratchet wrench of the present invention mainly comprises a ratchet portion (20) which is coupled to one end of the body (i 〇) A; wherein: the end ... see the second, As shown in the three figures, the main body (ι) is mainly composed of two half shells (11) (12) which are covered with each other, and the two half shells (1, ★ 旃 (1 2) can be made by components such as bolts. A locking piece is fixed, and two insulating sheets (1 3 2 ) which are also semi-circular in cross section are disposed between the opposite inner sides of the two '(1 1 ) ( 1 2 ); in the two halves of the casing / ) (1 2 A common motor (14) and a rechargeable battery pack (15), battery pack (... The horse 1 4) is electrically connected to provide the power required for the motor (丄4) to operate; the motor (14) is provided with a rechargeable battery pack (15); R 1 9 ), a power-off protection device (3 〇) and a power socket (1) among them, the motor (1 4 ), the switch (1 9 ), the power-off protection device (3 〇), and the power supply temple r ^ μ , the package seat (1 5 2 The cover is positioned between the two insulating sheets (1 3 2 ); 1316448 is provided on the power receiving base (1 52) with two pins for contacting the electrodes of the battery pack (15), The open g (丄9) is electrically connected to the power receiving base (152) and the motor (14), thereby controlling the battery pack (丄$) and the motor (work 4) through the switch (1 9 ) Power on or not 'and' motor (14) away from the battery pack (丄5) at one end of the output shaft, a gear is arranged on the output shaft, and then between the two housings (11) (12) Press #(192)' of the main body (1 ◦) and set a spring (196) against the knives so that when the user presses the button (1 gg ), the opening and closing of the switch (丄9) can be controlled. In the two halves of the housing (i) 2) A planetary gear set (16) driven by a gear (142) for the motor (upper 4) is provided, and the deceleration effect can be achieved by the setting of the comet gear set (16); 'And (16) mainly includes a rotating seat (162), and three (3) 奚 gears (Ίββ, b) are disposed on one side of the motor (1 4) toward the motor (1 4). ) is meshed with the motor (ι4. The gear on the shaft (1 42) is meshed and transmitted, and the planet is formed on the side of the rotating seat (1 6 ^ different from the side facing the motor (1 4 )) The gear set (1 6 ) 包含-step includes a ring gear for receiving f 68) and a planetary gear (16 Θ) (1 (1 is formed on the inner surface of the 1221 ring (1 68) with each planetary tooth, 6 The inner tooth portion of the merging portion of the toothed ring (168) is connected to the external thread of the external threaded screw, and is coupled to the internal thread surface of a connecting head (17), and the end of the 1316448 is screwed to the end. A positioning ring (l44) is formed between the ring gear (168) and the half-shell (it) (2).
前述的棘輪部（2 0 )係組設在本體（i 〇 ) 一端， 於棘輪部（2 0 ) —端設置有外螺紋而螺接連結於連接頭 (1 7 )相對應端的内螺紋面，藉此透過連接頭（i 7 ) 將棘輪部（2 0 ) ·且設在本體（丄〇 )的一端，於棘輪部 (2 0 )内設置有一棘輪裝置，由於該棘輪裝置與現有者 大致相同而不述，於該棘輪裝置設置有—伸出棘輪部 (20)連接端的傳動軸（22)，該傳動軸（22)係 與行星齒輪組（16)所設轉座（162)的傳動齒 6 4 )相嚅合連接。 藉此’當使用者按壓按鈕（1 9 2 )而使開關（X 9 )切換至導通狀態時’可使電池包（1 5 )對馬達（丄4 )供電而啟動馬達（1 4 輸出軸轉動，然後透過各行 星齒輪（166)血哉援βο、 内齒部的嚙合傳動， 讓各行星齒輪（1 6 6 )除自轉外，φ會相對齒環"6 8)公轉，進而帶動轉座（162)轉動，再透過傳動齒 (1 64)與傳動ϋ (22)的連接來帶動棘輪裝置作動 ，來實施鎖緊或鬆開螺栓或螺帽等作業。 •、此時’因棘輪裝置的作動係透過電池包（15)提供 電源以及馬達（]4 1 ίΑ ΒΓ· 4 4 )的驅動，所以該棘輪扳手可以不 另行外接壓力源或電泝，斯Γ/ a m & 所以使用者能方便地將該棘輪扳 手W至任何場料行作業，可大幅提高棘輪扳手使 方便性，·又當電池包（15)的電力用錢，可將電池包 8 1316448 (15)自本體（1 η、, -η- 、 、丄U)上取下充電，或者更換—新的電 ' (1 5 )，讓棘輪扳手能長時間持續使用。 再者於兩半殼體（I1) (12)間可設置有一供 馬達（14)之輪出軸貫穿其中的定位環（144)，並 :/疋位晨（1 44)來支撐輸出軸，使輸出轴在轉動 時能更加穩定’不會任意晃動；3於馬達（1 4 )的輸出 軸上套-X有位於各行星齒輪（1 6 6 )與定位環（1 4 4)間的塾片（146)，以避免行星齒輪（166)與The ratchet portion (20) is disposed at one end of the body (i 〇), and is provided with an external thread at the end of the ratchet portion (20) and screwed to the internal thread surface of the corresponding end of the connector (17). Thereby, the ratchet portion (20) is disposed at one end of the body through the connector (i7), and a ratchet device is disposed in the ratchet portion (20), since the ratchet device is substantially the same as the existing one. Needless to say, the ratchet device is provided with a transmission shaft (22) that extends from the connection end of the ratchet portion (20), and the transmission shaft (22) is coupled to the transmission tooth of the rotary seat (162) provided by the planetary gear set (16). 6 4) Connected together. By this, when the user presses the button (1 9 2 ) to switch the switch (X 9 ) to the on state, the battery pack (15) can be used to power the motor (丄4) to start the motor (1 4 output shaft rotation) Then, through the planetary gears (166), the internal gears of the internal gears are transmitted, so that the planetary gears (1 6 6) revolve, and the φ will revolve relative to the gear ring "6 8), thereby driving the transposition (162) Rotate, and then through the connection of the transmission teeth (1 64) and the transmission ϋ (22) to drive the ratchet device to perform the operation of locking or loosening the bolt or nut. • At this time, 'the ratchet wrench can be powered by the battery pack (15) and the motor (] 4 1 Α ΒΓ 4 4 4 ), so the ratchet wrench can be connected without external pressure source or electric trace. / am & Therefore, the user can conveniently work the ratchet wrench W to any field, which can greatly improve the convenience of the ratchet wrench. · When the battery pack (15) is used for electricity, the battery pack can be 8 1316448 (15) Remove the charge from the body (1 η,, -η-, 丄U), or replace the new one (1 5 ) to allow the ratchet wrench to continue to be used for a long time. Furthermore, a positioning ring (144) through which the wheel-out shaft of the motor (14) is inserted may be disposed between the two housing halves (I1) (12), and: / (19) to support the output shaft. The output shaft can be more stable when rotating 'do not arbitrarily shake; 3 on the output shaft of the motor (1 4 ), the sleeve -X has a weir between each of the planetary gears (16 6) and the positioning ring (1 4 4) Sheet (146) to avoid planetary gears (166)
而影響到行星齒輪（1 6 6 定位環（144)直接接觸， )的轉動。 又如第四圖所示，該斷電保護裝置（3 0 )係設於前 述之馬達（14)與接電座（1 52)之間，其電路構造 部分包括一功率電晶體（3 1 )、一電流感測電路（3 2 )、一驅動控制電路（3 3 )、一電流中斷比較電路（3 4)、一電流放大電路（35)以及一電流設定電路 6 )所組成；有關其詳細電路圖，請進一步參閱第五圖所 示，其中： 该功率電晶體（3 1 )’係由一場效電晶體Q2構成 ’其没/閘極係分別與馬達（1 4 )與電池包（1 5 )連 接； 該電流感測電路（3 2 )’其係設於場效電晶體Q2 之源極，透過場效電晶體Q2與馬達（1 4 )連接，以感 測馬逹（1 4 )之負載電流；於本實施例中，其係由二並 聯電阻R8、R9構成； 9 1316448 該驅動控制電路（3 3 )，其係由一 BJT電晶體Q1 構成，其集極分別連接電池包（1 5 )與場效電晶體Q2 的閘極； 該電流中斷比較電路（34)，其一輸入端係透過一 電流放大電路（3 5)與電流感測電路（3 2)之輸出端 連接，以判斷負載電流是否大於一設定的參考值，其輪出 端則透過一電阻R3連接至BJT電晶體qi的基極；於本 實施例中，該電流中斷比較電路（3 4 )與電流放大電路 (3 5 )係由一編號LM358晶片中的運算放大器所構成； 忒電流设定電路（3 6 )，係設於電流中斷比較電路 (34)之另一輸入端，用以設定馬達（14)的到達斷 電保護標準的負載電流大小；於本實施例中，其係由二分 壓電阻R5、R7構成。 藉由上述電路設計，在電源開始供應後，場效電晶體 Q2因閘極為高電位而導通，馬達（丄4 )隨即通電而運 轉在此同時，通過馬達（14)的負載電流透過場效電 晶體Q2 |電流感測電路（3 2 )所感測，電流感測電路 (3 2 產生—電壓信號，經電流放大電路（3 5 )放 大後送入電流中斷比較電路（3 4)中. 方馬達（1 4)的負載電流未超過電流設定電路（3 6 ) 6又疋的參考值，則電流比較電路（3 5 )輸出低電位 予BJT電曰曰體Q1之基極，貝q Bjt電晶體⑴處於 態，電池包（15)之雪*姓路， ^ 、 ^^之電力持續供應予馬達（14); 若馬達（1 4)的負載電流超過電流設定電路（3 2 10 1316448 )設定的斷電電流’則電流比較電路（3 5 )輪出一高電 位的觸發信號予BJT電晶體Q1之基極，使其導通；此時 ’ Β」Τ電晶體Q1視同短路，其集極輸出為低電位，場效 電晶體Q2之閘極為低電位而截止，因此，電池包（1 5 )停止供電予馬達（14)，使馬達（14)停止運轉， 以嫁保馬達（1 4 )不致因過載而燒毀，而獲致斷電保護 之目的。 又請參閱第六、七圖所示，係本發明又一較佳實施例 的外觀圖及剖視圖，其構造與前一實施例大致相同，不同 處在於本實施例提供之開關（i 9 A)為一微動開關，微 動開關上具有一可彈性伸縮的動作桿（丄9 〇 A ),又在 兩半殼體（1 1 ) #近電池包（i 5 )的外壁處柩設有一 扣柄（192A) ’該扣柄（192a)具適當長度，其 末端對應於前述開關（1 9 A )的動作桿（丄9 〇 A )， 當使用者握持於兩半殼體（11) (1〇、， 、丄(12)外，並向内扳 動扣柄（192A)時，扣柄（1 λ、 們、丄y 2 a)末端將壓制開It affects the rotation of the planetary gears (1 6 6 positioning ring (144) direct contact). As shown in the fourth figure, the power-off protection device (30) is disposed between the motor (14) and the power receiving base (1 52), and the circuit structure portion thereof includes a power transistor (3 1 ). a current sensing circuit (3 2 ), a driving control circuit (3 3 ), a current interrupt comparison circuit (34), a current amplifying circuit (35), and a current setting circuit 6); For the circuit diagram, please refer to the fifth figure, where: The power transistor (3 1 )' is composed of a potential transistor Q2 'its no / gate system and motor (1 4 ) and battery pack (1 5 The current sensing circuit (3 2 ) is disposed at the source of the field effect transistor Q2 and connected to the motor (1 4 ) through the field effect transistor Q2 to sense the horse 逹 (1 4 ) Load current; in this embodiment, it is composed of two parallel resistors R8, R9; 9 1316448 The drive control circuit (3 3 ) is composed of a BJT transistor Q1, and the collectors are respectively connected to the battery pack (1) 5) with the gate of the field effect transistor Q2; the current interrupt comparison circuit (34), one input of which is passed through a current The large circuit (3 5) is connected to the output end of the current sensing circuit (32) to determine whether the load current is greater than a set reference value, and the wheel end is connected to the base of the BJT transistor qi through a resistor R3. In this embodiment, the current interrupt comparison circuit (34) and the current amplifier circuit (35) are formed by an operational amplifier in a number LM358 chip; the 忒 current setting circuit (36) is provided in The other input terminal of the current interruption comparison circuit (34) is used to set the load current of the motor (14) to the power-off protection standard; in the embodiment, it is composed of two voltage-dividing resistors R5 and R7. With the above circuit design, after the power supply is started, the field effect transistor Q2 is turned on because the gate is extremely high, and the motor (丄4) is energized to operate at the same time, and the load current through the motor (14) is transmitted through the field effect power. The crystal Q2 is sensed by the current sensing circuit (3 2 ), and the current sensing circuit (3 2 generates a voltage signal, which is amplified by the current amplifying circuit (3 5 ) and sent to the current interrupt comparison circuit (3 4). The load current of (1 4) does not exceed the reference value of the current setting circuit (3 6 ) 6 and the current comparison circuit (3 5 ) outputs a low potential to the base of the BJT electric body Q1, and the b qt transistor (1) In the state, the battery pack (15) snow* surname, ^, ^^ power is continuously supplied to the motor (14); if the load current of the motor (1 4) exceeds the current setting circuit (3 2 10 1316448) The power-off current 'the current comparison circuit (3 5 ) rotates a high-potential trigger signal to the base of the BJT transistor Q1 to turn it on; at this time, the 'Β' transistor Q1 is considered to be short-circuited, and its collector output For low potential, the gate of field effect transistor Q2 is extremely low and cut off, therefore, The pool pack (1 5 ) stops supplying power to the motor (14), so that the motor (14) is stopped, so that the motor (14) is not burnt due to overload, and the purpose of power-off protection is obtained. FIG. 7 is an external view and a cross-sectional view of another preferred embodiment of the present invention. The configuration is substantially the same as that of the previous embodiment. The difference is that the switch (i 9 A) provided in this embodiment is a micro switch, and the micro-motion is The switch has an elastically movable action rod (丄9 〇A), and a buckle handle (192A) is attached to the outer wall of the two half casing (1 1 ) # near battery pack (i 5 ). (192a) having an appropriate length, the end of which corresponds to the action lever (丄9 〇A) of the aforementioned switch (1 9 A ), when the user holds the two housing halves (11) (1〇, 丄, 丄 (12) Outside, and when the handle (192A) is pulled inward, the ends of the buckles (1 λ, 丄 y 2 a) will be pressed open.
關（19A)之動作桿（190A)估甘A 丄y u A )使其内縮，而令開關 (1 9 A )導通，並使馬達（1 4 ) <、丄斗）開始運轉；當使用者 釋放扣柄（1 9 2 A )，則開關（}卩 J剛、丄9 A )將因動作桿（ 1 9 ◦ A )復位而關閉，從而馬達（ ’运I14)亦停止運轉。 綜上所述，本發明確可改進習 運為用電動棘輪扳手結構及 使用上的不足與缺失，實為一極且逸 八進步性之佳作，且本發 明未見於刊物或公開使用，符合發明奎^ 赞明專利之申請要件，爰 依法具文提出申請。 1316448 【圖式簡單說明】 第一圖：係本發明一較佳實施例之立體圖。 第二圖：係本發明一較佳實施例之立體分解圖。 第三圖：係本發明一較佳實施例之局部剖面圖。 第四圖：係本發明一較佳實施例之電流斷電裝置之電 路方塊圖。 第五圖：係本發明一較佳實施例之斷電保護裝置之電 路圖。 第六圖：係本發明又一較佳實施例的立體圖。 第七圖：係本發明又一較佳實施例的局部剖視圖。The action lever (190A) of Guan (19A) is estimated to be indented, and the switch (1 9 A) is turned on, and the motor (1 4 ) <, the bucket is started to run; When the release lever (1 9 2 A) is released, the switch (}卩J just, 丄9 A) will be closed by the action lever (1 9 ◦ A ), and the motor ('I14) will also stop running. In summary, the present invention can improve the structure and use of the electric ratchet wrench, and it is a great work of the first step and the progress of the invention, and the invention is not found in the publication or public use, and is in accordance with the invention. Kui ^ praises the application requirements of the patent, and submits an application according to law. 1316448 BRIEF DESCRIPTION OF THE DRAWINGS First FIG. is a perspective view of a preferred embodiment of the present invention. Second Figure: is an exploded perspective view of a preferred embodiment of the present invention. Third Figure: A partial cross-sectional view of a preferred embodiment of the present invention. Figure 4 is a block diagram of a circuit of a current interrupting device in accordance with a preferred embodiment of the present invention. Figure 5 is a circuit diagram of a power-off protection device in accordance with a preferred embodiment of the present invention. Figure 6 is a perspective view of still another preferred embodiment of the present invention. Figure 7 is a partial cross-sectional view showing still another preferred embodiment of the present invention.
【主要元件符號說 (1 〇)本體 (1 2 )半殼體 (1 4 )馬達 (1 4 4 )定位環 (1 5 )電池包 (1 6 )行星齒輪組 (1 6 4 )傳動齒 (1 6 8 )齒環 (19) ( 1 9 A )開 (1 9 2 )按鈕 (1 9 6 )彈簧 (1 1 )半殼體 (1 3 2 )絕緣片 (1 4 2 )齒輪 (1 4 6 )墊片 (1 5 2 )接電座 (1 6 2 )轉座 (1 6 6 )行星齒輪 (1 7 )連接頭 關（1 9 0 A)動作桿 (1 9 2 A )扣柄 12 1316448 (2 Ο )棘輪部 （2 2 )傳動軸 (3 Ο )斷電保護裝置（3 1 )功率電晶體 (3 2 )電流感測電路（3 3 )驅動控制電路 (3 4 )電流中斷比較電路 (3 5 )電流放大電路（3 6 )電流設定電路[Main component symbol says (1 〇) body (1 2 ) half-shell (1 4 ) motor (1 4 4 ) positioning ring (1 5 ) battery pack (1 6 ) planetary gear set (1 6 4 ) transmission teeth ( 1 6 8) Tooth ring (19) (1 9 A) open (1 9 2 ) button (1 9 6 ) spring (1 1 ) half-shell (1 3 2) insulating sheet (1 4 2) gear (1 4 6) Gasket (1 5 2 ) Connected to the base (1 6 2 ) Transposition (1 6 6 ) Planetary gear (1 7 ) Connection head off (1 0 0 A) Action rod (1 9 2 A) Buckle 12 1316448 (2 Ο ) ratchet part (2 2 ) drive shaft (3 Ο) power-off protection device (3 1 ) power transistor (3 2 ) current sensing circuit (3 3 ) drive control circuit (3 4 ) current interruption comparison Circuit (3 5 ) current amplifying circuit (3 6 ) current setting circuit
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