JP5541497B2 - Electric tool - Google Patents

Description

  The present invention relates to a power tool, and more particularly to a power tool provided with a switch for controlling rotation of a motor.

  An electric power tool, for example, a disc clinder, includes a switch for ensuring safety as disclosed in Patent Document 1. This switch supplies power to the motor for the first time by pulling a lever to which the switch is connected with a finger or pushing it with the palm of a hand when holding a housing or the like during work.

Japanese Utility Model Publication No. 04-86185

  The lever to which the switch is connected is provided on the housing. On the other hand, when the operator holds the housing with both hands, the lever can be operated with either hand, but when the operator holds the housing with one hand, the lever is in the holding position. There were cases where it was difficult to operate. There is also a disc grinder with a lock mechanism that prevents malfunction of the lever, but when gripping the housing with one hand, the operability of the lock mechanism may be inferior depending on the position of the lock mechanism. . Accordingly, an object of the present invention is to provide a power tool that ensures safety and is excellent in operability.

In order to solve the above-mentioned problems, a motor, a housing containing the motor, a lever rotatably provided on the housing, and the housing and the lever are interposed between the lever and the lever cannot be rotated. A switch that turns off the motor when it is off, cuts off the power to the motor, and turns on when the lever is turned to allow the motor to be energized. provided off-lock member that the dynamic non, the said off-lock member, a portion of the switch is provided, wherein the off-lock member is a direction opposite to the first direction or the first direction the By moving in two directions, the switch provides an electric tool that is turned on.

  According to such a configuration, since the off-lock member and the lever are connected, the off-lock member and the lever can be operated at the same time, and the operability can be improved. Moreover, since there is an off-lock member, it is possible to prevent malfunction of the lever and ensure safety.

  According to such a configuration, the components can be simplified, and the operability can be increased by reducing the weight of the power tool.

  The lever has a first rotation shaft portion on one end side of the housing and extends from the first rotation shaft portion toward the other end side, and on the other end side of the housing. A second lever having a second rotation shaft portion and extending from the second rotation shaft portion toward one end side, and the off-lock member includes an extension direction tip of the first lever, It is preferable that the second lever is interposed between the end of the second lever in the extending direction.

  According to such a configuration, the switch can be operated by operating either the first lever or the second lever. Therefore, by disposing the first lever and the second lever at positions assumed to be gripped in the housing, the motor can be driven by operating the switch regardless of the position of the housing.

In order to solve the above problems, a motor, a housing containing the motor, a lever rotatably provided on the housing, and a lever interposed between the housing and the lever are rotated. A switch that interrupts energization of the motor in an incapable state and permits energization of the motor in a state in which the lever is rotated, and the lever is disposed at a first position and a second position. A button is provided, the button is provided with a connector, and the switch is connected to the first contactor that can be contacted by the connector in the first position, and to the connection in the second position. A second contacted element that can be contacted by the child , and the lever can be rotated in a state in which the button is disposed at either the first position or the second position. Provide tools.

  According to such a configuration, since the button and the lever are connected, the button and the lever can be operated at the same time, and the operability can be improved. Further, since the lever does not rotate unless the button is arranged at any position, it is possible to prevent the malfunction of the lever and ensure safety.

  According to such a configuration, the components can be simplified, and the operability can be increased by reducing the weight of the power tool.

  The lever has a first rotating shaft at one end of the housing and extends from the first rotating shaft toward the other end, and a second lever at the other end of the housing. And a second lever extending toward the one end side from the second rotation shaft portion, and the button includes a distal end in the extending direction of the first lever and the second lever. It is preferable to interpose between the front end of the extending direction.

  According to such a configuration, the switch can be operated by operating either the first lever or the second lever. Therefore, by disposing the first lever and the second lever at positions assumed to be gripped in the housing, the motor can be driven by operating the switch regardless of the position of the housing.

In order to solve the above problems, the first rotation shaft has a motor, a switch for controlling energization to the motor, a housing containing the motor, and a first rotation shaft portion at the front end of the housing. A first lever that extends to the rear end so as to be rotatable about a shaft portion as a rotation shaft, a second rotation shaft portion at the rear end of the housing, and the second rotation shaft portion as a rotation shaft. A second lever that is pivotably extended to the front end side, and a connecting member that is pivotally connected to a rear end of the first lever and a front end of the second lever, the switch , said first lever or said second lever is provided a power tool turned oN by being operated to rotate.

According to such a configuration, it is possible to operate the switch in the ON state by operating any one of the first lever and the second lever. Further, since either the first lever or the second lever is located from the front end to the rear end of the housing, the switch can be operated to drive the motor regardless of the position of the housing.

  In the electric tool configured as described above, the connection member includes an allowable position that allows the first lever and the second lever to rotate, and a prevention position that prevents the first lever and the second lever from rotating. It is preferable to be able to move between.

  According to such a configuration, as long as the connecting member is arranged at the prevention position, the first and second levers do not rotate. Can be secured.

Moreover, it is preferable that this operation part can be rotated with respect to this housing.
In order to solve the above problems, a motor, one switch for controlling energization to the motor, a housing incorporating the motor, and a rotatable connection to the housing, respectively, in the motor axial direction. A first lever and a second lever extending side by side, and one off-lock member for restricting the rotational movement of both the first lever and the second lever, and operating the off-lock member Provided is an electric tool in which the switch is turned on when one of the first lever and the second lever is operated while releasing the restriction of the rotation operation.
In the electric tool configured as described above, the first lever and the second lever each have a rotation shaft portion connected to the housing, and the off-lock member is disposed between the rotation shaft portions. .
In addition, it is preferable that one of the first lever and the second lever is operated to rotate the other.
Furthermore, it has a transmission member provided between one of the first lever and the second lever and the switch, and when one of the first lever and the second lever is operated, It is preferable that the switch is turned on via a transmission member.

  According to the electric tool of the present invention, safety can be ensured and operability can be improved.

1 is a side partial cross-sectional view of a disc grinder according to an embodiment of the present invention. Sectional drawing in the housing of the disk grinder which concerns on embodiment of this invention. The fragmentary sectional view which concerns on operation | movement of the off-lock button of the disc grinder which concerns on embodiment of this invention (state which a lever cannot rotate). The fragmentary sectional view which concerns on operation | movement of the off-lock button of the disc grinder which concerns on embodiment of this invention (state which the lever rotated). The fragmentary sectional view which concerns on operation | movement of the off-lock button in the 1st modification of the disc grinder which concerns on embodiment of this invention (state which a lever cannot rotate). The fragmentary sectional view which concerns on operation | movement of the off-lock button in the 1st modification of the disc grinder which concerns on embodiment of this invention (state which the lever rotated). The fragmentary sectional view which concerns on the switch in the 2nd modification of the disc grinder which concerns on embodiment of this invention.

  Hereinafter, an electric power tool according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4. A disc grinder 1 that is an electric tool shown in FIG. 1 is mainly composed of a housing 2, a switch mechanism 3, a motor 4 (FIG. 2), and a gear mechanism 5, and is connected to the gear mechanism 5. A tool that performs cutting, polishing, and the like with the blade 10.

  The housing 2 mainly includes a main housing 21 that holds the switch mechanism 3 and the motor 4, a gear case 22 that protects the gear mechanism 5, and a cover 23 that protects the cutting blade 10. The main housing 21 has a cylindrical shape with one axial end opened and the other axial end closed, the switch mechanism 3 and the motor 4 are built in the cylinder, and a gear case 22 is mounted on one axial end. Has been. In the following description, the front-rear direction is defined with the cylindrical axial direction toward the gear case 22 from the main housing 21 as the front side. In the main housing 21, a lever accommodating portion 21 a is formed in a groove shape extending in the front-rear direction on a part of the cylindrical outer peripheral surface. A pair of a first recess 21b and a second recess 21c arranged in the front-rear direction are formed at a substantially central position in the lever receiving portion 21a, and the lever receiving portion is between the first recess 21b and the second recess 21c. A contact surface 21A forming a part of the bottom surface of 21a is defined. The perforation position of the first recess 21b corresponds to the center position in the front-rear direction of the off-lock button 35 when the later-described off-lock button 35 moves most forward. Further, the drilling position of the second recess 21c corresponds to the center position of the off-lock button 35 in the front-rear direction when the later-described off-lock button 35 moves most rearward. A power cable 2 </ b> A connected to an external power source is disposed at the rear end position of the main housing 21.

  The gear case 22 is disposed on the front side of the main housing 21, closes the opening of the main housing 21, and includes a plurality of bearings and metals that rotatably support the gear mechanism 5 therein.

  The cover 23 is disposed in the vicinity of a mounting portion 52C of a later-described spindle 52A of the gear case 22, and is configured to cover the outer periphery of the cutting blade 10 and to expose the front side of the cutting blade 10.

  The switch mechanism 3 mainly includes a control unit 31, a switch unit 32, a first lever 33, a second lever 34, and an off-lock button 35. The control unit 31 is disposed on the rear end side in the main housing 21, supplies power supplied from the power cable 2 </ b> A to the motor 4 based on the ON signal from the switch unit 32, and converts it into an OFF signal from the switch unit 32. Based on this, the power supply to the motor 4 is cut off. In addition, the switch which accept | permits and interrupts | blocks the electricity supply to the motor 4 from the control part 31 and the switch part 32 is comprised.

  The switch part 32 is mainly composed of a substrate 32A, a first switch 32B which is a first contactor, and a second switch 32C which is a second contactor, and is connected to the control part 31 by a conducting wire. . The substrate 32A is provided in the main housing 21 at a wall position where the first recess 21b and the second recess 21c are formed. The first switch 32B is disposed on the substrate 32A, and its head is exposed in the first recess 21b to form the bottom wall of the first recess 21b. The head of the second switch 32C is exposed in the second recess 21c to form the bottom wall of the second recess 21c. The substrate 32A transmits an OFF signal to the control unit 31 in a state where the first switch 32B and the second switch 32C are not pressed, and in a state where one of the first switch 32B and the second switch 32C is pressed. An ON signal is transmitted to the control unit 31.

  The first lever 33, which is the first operating portion, is housed on the front side in the lever housing portion 21a and has a first rotating shaft portion 33A connected to the main housing 21 at the front end side position in the lever housing portion 21a. And it is comprised in the elongate shape extended toward the back side from 33 A of 1st rotation shaft parts. The first rotation shaft portion 33 </ b> A enables the first lever 33 to rotate with respect to the main housing 21 with a direction orthogonal to the front-rear direction as a rotation axis. In addition, a spring (not shown) that urges the first lever 33 to rotate clockwise on the paper surface of FIG. The rear end, which is the front end of the first lever 33 in the extending direction, is located near the front side of the first recess 21b in the front-rear direction, and the first step portion 33a is slightly ahead of the rear end of the first lever 33. Is formed. The rear end side of the first step portion 33a of the first lever 33 is configured to be thinner than the front end side of the first step portion 33a. A first spring 33 </ b> B that is a coil spring having an extending direction of the first lever 33 as an extending / contracting direction is provided at the end position of the first lever 33.

  The second lever 34, which is the second operating portion, is accommodated on the rear side in the lever accommodating portion 21a, and is connected to the main housing 21 at the rear end side position in the lever accommodating portion 21a. And has a long shape extending from the second rotation shaft portion 34A toward the front side. The second rotation shaft portion 34 </ b> A is a rotation shaft parallel to the rotation shaft of the first rotation shaft portion 33 </ b> A, and enables the second lever 34 to rotate with respect to the main housing 21. In addition, a spring (not shown) that urges the second lever 34 to rotate counterclockwise on the paper surface of FIG. The foremost end, which is the leading end in the extending direction of the second lever 34, is located in the vicinity of the rear side of the second recess 21c in the front-rear direction, and the second step portion is slightly behind the foremost end of the second lever 34. 34a is formed. The front end side of the second step 34a of the second lever 34 is configured to be thinner than the rear end side of the second step 34a. A second spring 34 </ b> B that is a coil spring having an extending direction of the second lever 34 as an extension / contraction direction is provided at the foremost end position of the second lever 34.

  As shown in FIG. 3, the off-lock button 35, which is a connecting member, mainly includes a main body portion 35A, a knob 35B, and a contact 35C. The main body portion 35A is formed with a first perforation 35a drilled from the front to the rear at the front end position and a second perforation 35b drilled from the rear to the front at the rear end position. 33 and the second lever 34 are connected to each other. Specifically, the rear end portions of the first spring 33B and the first lever 33, which are urging members, are inserted into the first perforation 35a, and the rear end of the first spring 33B and the bottom wall of the first perforation 35a are connected. The second spring 34B as a biasing member and the front end portion of the second lever 34 are inserted into the second perforation 35b, and the front end of the second spring 34B and the bottom wall of the second perforation 35b are connected. Thus, the main body portion 35A is connected to the first lever 33 and the second lever 34, respectively. The hole diameter of the first hole 35a is formed such that only the rear side of the first step 33a of the first lever 33 can be inserted, and the hole diameter of the second hole 35b is smaller than that of the second step 34a of the second lever 34. Only the front side has a diameter that can be inserted. The first perforation 35a and the second perforation 35b are formed coaxially.

  The off-lock button 35 is connected to the first lever 33 and the second lever 34 via the first spring 33B and the second spring 34B, so Direction) and backward (second direction). When the off-lock button 35 moves to the front side, the rear end of the first lever 33 is inserted into the first perforation 35a. As described above, the front side of the first step portion 33a of the first lever 33 is Since it cannot be inserted into the first perforation 35a, the position where the wall surface defining the first step portion 33a is in contact with the front end surface of the main body portion 35A and moved to the foremost side of the off-lock button 35 (first position) Is defined. Similarly, the position (second position) moved to the rearmost side of the off-lock button 35 is also defined at a position where the wall surface defining the second step portion 34a contacts the rear end surface of the main body portion 35A.

  Further, since the first spring 33B and the second spring 34B are coil springs, they can be bent. Therefore, in a state where the first lever 33 and the second lever and the off-lock button 35 are connected via the first spring 33B and the second spring 34B, the off-lock button 35 is connected to the first lever 33 and the second lever 34. A slight rotation is possible.

  The knob 35B protrudes from the main body portion 35A toward the side opposite to the main housing 21, and as shown in FIG. 1, at least its tip is exposed from the lever accommodating portion 21a (FIG. 2).

  The contact 35C protrudes from the main body portion 35A toward the main housing 21 so as to face the contact surface 21A in a state where the off-lock button 35 is not operated to the front side or the rear side, and is combined with the main body portion 35A. The convex part is comprised. The contact 35C is disposed at the center position in the front-rear direction of the off-lock button 35, and is configured such that the cross section perpendicular to the protruding direction is smaller than the holes of the first recess 21b and the second recess 21c. . As described above, the first recess 21b and the second recess 21c are formed at positions corresponding to the center position in the front-rear direction of the off-lock button 35 when the off-lock button 35 moves most forward and most rearward, respectively. Therefore, when the off-lock button 35 moves most forward and most rearward, the contact 35C can be inserted into the first recess 21b and the second recess 21c, and the first switch 32B can be inserted by the contact 35C. The second switch 32C can be pressed.

  As described above, the switch portion 32 is provided in the main housing 21 and is indirectly operated by the first lever 33 and the second lever 34 via the off-lock button 35. That is, the switch portion 32 is interposed between the housing 2 and the first lever 33 and the second lever 34, and is turned off when the first lever 33 and the second lever 34 are not rotatable. The energization is cut off, and the first lever 33 and the second lever 34 are turned on, and the motor 4 is energized. The above-described spring (not shown) interposed between the first lever 33 and the second lever 34 and the main housing 21 regardless of whether the first lever 33 and the second lever 34 are rotatable or not. Thus, in a state where the first lever 33 and the second lever 34 are urged, the switch portion 32 is in the OFF state at the position where the off-lock button 35 is farthest from the switch portion 32. That is, the switch part 32 is turned on for the first time by moving the off-lock button 35 forward or backward and rotating the first lever 33 and the second lever 34 against a spring (not shown). It becomes possible.

  The motor 4 has a rotation shaft portion 41, and is disposed on the front side of the control portion 31 in the main housing 21 so that the axial direction of the rotation shaft portion 41 coincides with the front-rear direction. The rotating shaft portion 41 protrudes to the front side of the motor 4 and is supported on the gear case 22 by a bearing, and a fan 42 is fixed to the root portion so as to rotate coaxially with the rotating shaft portion 41.

  The gear mechanism 5 is mainly composed of a pinion gear 51 and a spindle portion 52, and is disposed in the gear case 22. The pinion gear 51 is provided in the front end part of the rotating shaft part 41, and is comprised by the bevel gear shape.

  The spindle part 52 is mainly composed of a spindle 52A and a gear 52B. The spindle 52A is rotatably supported by a metal and a bearing in the gear case 22 so as to be orthogonal to the rotation shaft portion 41, and a mounting portion 52C that is the tip of the spindle 52A is configured to be exposed from the gear case 22. Yes. The gear 52B is a bevel gear and is mounted so as to mesh with the pinion gear 51 and rotate integrally with the spindle 52A.

  The cutting blade 10 is a disc-shaped cutting grindstone, and is fixed to the mounting portion 52C so as to rotate coaxially with the spindle 52A by a jig 52D.

  When using the disc grinder 1 having the above-described configuration, first, the knob 35B is operated to move the off-lock button 35 forward or backward (move backward in FIG. 4) to the maximum extent. Thereafter, the main housing 21 is gripped while the off-lock button 35 is moved, and the first lever 33, the second lever 34, and the off-lock button 35 are pushed in to push the first lever 33 and the second lever 34. 4, the second switch 32 </ b> C is pushed by the contact 35 </ b> C as shown in FIG. 4, an ON signal is output to the control unit 31, power is supplied to and driven by the motor 4, and the cutting blade 10 is moved. Rotate and work.

  As described above, since the first lever 33 and the second lever 34 are connected via the off-lock button 35, an operation of pushing into either the first lever 33 or the second lever 34 is performed. Thus, the first lever 33 and the second lever 34 can be rotated simultaneously. Since the first lever 33 and the second lever 34 are arranged from the substantially front end to the substantially rear end position of the main housing 21 where the operator holds the grip, any position of the main housing 21 is gripped in the front-rear direction. However, either the first lever 33 or the second lever 34 can be operated. That is, regardless of the position of the main housing 21, the motor 4 can be driven by operating the first switch 32B or the second switch 32C, and the operability is improved.

  Further, in a state where the off-lock button 35 is not moved forward or backward, the contact 35C faces the contact surface 21A. Therefore, any one of the first lever 33, the second lever 34, and the off-lock button 35 is used. Even if the contactor 35C is pushed in, the contact 35C and the abutment surface 21A cannot contact and push in, preventing the first lever 33 and the second lever 34 from rotating, and the first switch 32B and the first switch 32B. The two switch 32C is not pushed. Therefore, the ON signal is not transmitted to the control unit 31, and the power supply to the motor 4 is kept cut off to prevent malfunction, so that safety can be ensured. In addition, since the pressing to the first switch 32B and the second switch 32C and the malfunction are controlled only by the off-lock button 35, an increase in the number of components constituting the disc grinder 1 is suppressed, and the components are simplified. Therefore, the weight of the disk grinder 1 can be reduced and the operability can be improved.

  In addition, the first lever 33 and the second lever 34 which are levers according to the present embodiment are respectively provided with rotation shafts at the front end position and the rear end position of the main housing 21. When the length is L1 and the length of the second lever 34 is L2, the amount of movement in the direction orthogonal to the front-rear direction required to rotate the first lever 33 by an angle α (α is a slight angle) is: L1tanα≈L1α. On the other hand, for example, a lever (L1 + L2) having a length (L1 + L2) obtained by adding the first lever 33 and the second lever 34 is connected to the main housing 21 by the rotation shaft at the same position as the first lever 33. Similarly, the amount of movement required to rotate the angle α is (L1 + L2) tan α≈ (L1 + L2) α, and the amount of movement increases.

  That is, by using the first lever 33 (L1) and the second lever 34 (L2) according to the present embodiment, the lever (L1 + L2) having a length obtained by adding the first lever 33 and the second lever 34 is used. In comparison, if the rotation angle is the same, the amount of movement can be reduced. By reducing the amount of movement, the amount of protrusion of the first lever 33, the second lever 34, and the off-lock button 35 from the housing 2 can be reduced. By reducing the amount of protrusion, the first lever 33 And the malfunction by the 2nd lever 34 contact | abutting another thing can be suppressed, and the outer diameter of the disk grinder 1 can be comprised small.

  The off-lock button 35 is disposed at a position farthest from the first rotation shaft portion 33A and the second rotation shaft portion 34B of the first lever 33 extending in the front-rear direction and the second lever 34 extending in the front-rear direction. . This position is the position where the amount of movement in the direction orthogonal to the front-rear direction is the largest, so even if the protruding amounts of the first lever 33, the second lever 34, and the off-lock button 35 from the housing 2 are small, the off-lock The movement amount of the button 35 is ensured. Therefore, even if the protruding amounts of the first lever 33, the second lever 34, and the off-lock button 35 are small, the difference in the ON / OFF operation to the worker is clearly transmitted, and the operator's operability can be improved. .

  The power tool according to the present invention is not limited to the above-described embodiment, and various improvements and modifications can be made within the scope described in the claims. For example, as shown in FIG. 5, as a first modification, the first Hall element 132B and the second Hall element 132C, which are magnetic sensors, may be used as the contacted elements, and the magnet 135C may be used as the contactor. Also in this configuration, as shown in FIG. 6, the off-lock button 35 is moved back and forth (moved backward in FIG. 6), and the magnet 135C is sensed by the second Hall element 132C, whereby the controller 31 (FIG. The ON signal is transmitted to 2), and the rotation of the motor 4 can be controlled. In this configuration, the magnet 135C, which is a contacted element, also functions as a part of the switch.

  By using the magnet 135 and the first and second Hall elements 132B and C, the first and second Hall elements 132B and C can be used without directly contacting the magnet 135 and the first and second Hall elements 132B and C. May sense the magnet 135. Therefore, wear or the like does not occur, and the durability between the magnet 135 and the first and second Hall elements 132B and C can be improved and the life can be extended. In addition, since the second Hall elements 132B and C need only sense the magnet 135, there is no need to mechanically push in, and therefore the force required to operate the first and second levers 33 and 34 is reduced. Operability can be improved.

  As a second modification, a toggle switch 232 including a toggle lever 232A generally used as a switch may be used as shown in FIG. In the configuration using the toggle switch 232, the toggle switch 232 is arranged so that the rotation direction of the toggle lever 232A intersects the front-rear direction. The toggle switch 232 is configured to emit an OFF signal when the toggle lever 232A is located on the second lever 34 side, and to emit an ON signal when located on the counter-second lever 34 side. Also, a transmission member 236 that transmits the movement in the direction orthogonal to the front-rear direction due to the rotation of the second lever 34 to the toggle lever 232A is disposed between the toggle lever 232A and the second lever 34. The second lever 34 is provided with a receiving portion 234 </ b> C that contacts the transmission member 236 and receives the transmission member 236. The transmission member 236 is supported by the main housing 21 via a spring 236A so as to be movable in a direction orthogonal to the front-rear direction, and is urged by the spring 236A in a direction from the toggle switch 232 to the second lever 34. ing. The transmission member 236 has a recess 236a into which the toggle lever 232A is inserted.

  In the configuration shown in FIG. 7, the operator holds the main housing 21, moves the off-lock button 35 forward or rearward, pushes the first lever 33 or the second lever 34, and rotates the second lever 34. By moving, the transmission member 236 moves in the direction from the second lever 34 toward the toggle switch 232 against the urging force of the spring 236A. By the movement of the transmission member 236, the toggle lever 232A inserted in the recess 236a rotates, and the toggle switch 232 is turned on to transmit an ON signal. Further, when the operator releases his hand from the first lever 33 or the second lever 34, the transmission member 236 moves in the direction from the toggle switch 232 toward the second lever 34 due to the biasing force of the spring 236 </ b> A. Accordingly, the toggle lever 232A moves to the second lever 34 side, and the toggle switch 232 transmits an OFF signal.

  In the present embodiment and the first modification, the off-lock button 35 is moved to the rear side and the first lever 33 and the second lever 34 are rotated. The first lever 33 and the second lever 34 may be rotated. Moreover, since the 1st recessed part 21b and the 2nd recessed part 21c were located in a line with the off-lock button 35, it was comprised so that it could move back and forth, and the 1st lever 33 and the 2nd lever 34 were made to rotate. However, the present invention is not limited to this configuration, and the recess 21b and the second recess 21c are formed so as to be aligned in the direction intersecting with the front and rear, for example, the circumferential direction in the cylindrical shape of the main housing 21 in FIG. Similarly, a configuration that moves in the circumferential direction may be adopted.

  The power tool of the present invention is not limited to the disk grinder described in the above-described embodiment, and the power tool adopting a configuration in which an operator holds a housing in which a motor or the like is built, such as a saver saw, is also described above. The present invention can be applied similarly to the embodiment mode.

1. Disc grinder 2. Housing 2A. Power cable 3. Switch mechanism 4. Motor 5. Gear mechanism 10. Cutting blade 21 Main housing 21A Contact surface 21a Lever housing 21b ··· First recess 21c · · Second recess 22 · · Gear case 23 · · Cover 31 · · Control portion 32 · · Switch portion 32A · · Board 32B · · first switch 32C · · second switch 33 · · First lever 33A ··· First rotation shaft portion 33B · · First spring 33a · · First step portion 34 · · Second lever 34A · · Second rotation shaft portion 34B · · Second spring 34a · · · Two-stage part 35 .. Off-lock button 35A.. Main body part 35B. 5 2. Spindle part 52A Spindle 52B Gear 52C Mounting part 52D Jig 132B First Hall element 132C Second Hall element 135C Magnet 232 Toggle switch 232A Toggle Lever 234C ·· Reception portion 236 ·· Transmission member 236A ·· Spring 236a ·· Recess

Claims (10)

A motor,
A housing containing the motor;
A lever rotatably provided on the housing;
It is interposed between the housing and the lever. When the lever is in a non-rotatable state, it is turned off and the motor is cut off. When the lever is turned, the lever is turned on and turned on. A switch that allows energization,
The lever is provided with an off-lock member that disables the lever,
The off-lock member is provided with a part of the switch,
Power tool, wherein the switch is made to the ON state by the off-lock member from the first direction or the first direction to move in a second direction which is opposite to the direction. The lever has a first rotation shaft portion on one end side of the housing and extends from the first rotation shaft portion toward the other end side, and a first lever on the other end side of the housing. A second lever having two pivot shafts and extending from the second pivot shaft toward one end;
The power tool according to claim 1, wherein the off-lock member is interposed between an extension direction tip of the first lever and an extension direction tip of the second lever. A motor,
A housing containing the motor;
A lever rotatably provided on the housing;
A switch that is interposed between the housing and the lever, interrupts energization of the motor when the lever is not rotatable, and permits energization of the motor when the lever is rotated. ,
The lever is provided with a button that can be arranged in a first position and a second position,
The button is provided with a connector,
The switch has a first contacted element that can be contacted by the connector in the first position, and a second contacted element that can be contacted by the connector in the second position;
The power tool characterized in that the lever can be rotated in a state in which the button is disposed at either the first position or the second position. The lever has a first rotation shaft portion at one end of the housing and extends from the first rotation shaft portion toward the other end side, and a second turn at the other end of the housing. A second lever that has a moving shaft portion and extends from the second rotating shaft portion toward one end side;
4. The electric tool according to claim 3, wherein the button is interposed between the distal end in the extending direction of the first lever and the distal end in the extending direction of the second lever. A motor,
A switch for controlling energization to the motor;
A housing containing the motor;
A first lever having a first rotation shaft portion at a front end of the housing and extending to the rear end side so as to be rotatable about the first rotation shaft portion;
A second lever having a second rotation shaft portion at the rear end of the housing and extending to the front end side so as to be rotatable about the second rotation shaft portion;
A connection member rotatably connected to a rear end of the first lever and a front end of the second lever,
The switch, power tool said first lever or said second lever is characterized by comprising the ON state by being rotated operated. The connecting member is movable between a permitting position for permitting the rotational operation of the first lever and said second lever, and preventing position for preventing the turning operation of said first lever and said second lever The power tool according to claim 5, wherein the power tool is provided. A motor,
One switch for controlling energization to the motor;
A housing containing the motor;
A first lever and a second lever which are rotatably connected to the housing and extend side by side in the motor axial direction;
One off-lock member for restricting the rotational movement of both the first lever and the second lever;
Have
An electric motor characterized in that the switch is turned on by operating either the first lever or the second lever while operating the off-lock member to release the restriction of the rotation operation. tool. The first lever and the second lever each have a rotation shaft portion connected to the housing, and the off-lock member is disposed between the rotation shaft portions. 7. The electric tool according to 7 . The power tool according to claim 7 or 8 , wherein one of the first lever and the second lever is rotated when the other is operated. A transmission member provided between one of the first lever and the second lever and the switch, and the transmission member is operated by operating either the first lever or the second lever; The power tool according to claim 9, wherein the switch is turned on via the switch.

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