JP2010064233A - Electric tool and power tool - Google Patents

Abstract

Provided is a rotary impact power tool that prevents a lever switch from being turned on by an unexpected operation, has versatility, and is excellent in dust resistance.
The operating lever is provided with a through hole formed at a position facing the plunger and a shielding plate that slides so as to open and close the through hole in the longitudinal direction of the operating lever. When the operation lever 5 is swung in a state where the through hole 51 is opened, the operation lever 5 passes through without pressing the plunger 21 and presses only the lock member 4. Accordingly, the protrusion 44 provided on the lock member 4 engages with the engaged portions 22a and 22b provided on the changeover switch 22 and engageable with the protrusion 44, and the changeover switch 22 is prohibited from sliding. Is done. When the operating lever 5 is swung in a state where the through hole 51 is closed, the operating lever 5 presses the plunger 21, turns on the power of the switch 2, and presses the lock member 4.
[Selection] Figure 2

Description

  The present invention relates to an electric tool and a power tool that control a motor by advancing and retracting an operation lever.

  A rotary impact tool, which is one of the electric tools, is widely used because it has a small reaction to the user and has a high tightening ability by the rotational impact force.

  In a normal rotary impact type tool, the rotation axis of the motor and the axis of the tip tool are arranged in a straight line.

  The rotary impact type tool having this configuration may be difficult to use when the distance between the workpiece and other parts is narrow. For such a case, an angle-type rotary impact tool has been developed and used (Patent Document 1). The angle-type rotary impact tool is a rotary impact-type tool configured to transmit a driving force by a motor in a direction perpendicular to the axis of the motor. In general, a long lever switch is used for an angle-type rotary impact tool so that it can be gripped over a wide range and can be turned on and off with good operability.

  The lever switch can be turned on and off with good operability, but the tool is driven simply by pressing the operation lever, so the object to be machined may be damaged when the motor is driven by contact with the operation lever during transportation. There is a risk that power is wasted.

  In order to solve this problem, for example, as disclosed in Patent Document 2, a device that prevents the lever from being turned on is also arranged.

  Further, Patent Document 3 discloses an example in which a Torg switch having a special configuration and excellent dust resistance is used.

Japanese Patent Laid-Open No. 6-285771 JP-A-9-290377 JP 2001-322074 A

  This type of tool requires a switch for reversing the motor in the forward and reverse directions. However, in the configuration of Patent Document 1, the lever switch and the changeover switch are separated, so the forward / reverse switch button is locked when the switch is turned on. Difficult to do. For this reason, a method of providing the switch itself with a function of locking the forward / reverse switching button when the switch is turned on is conceivable, but since the switch becomes special, versatility is lost.

  Further, the configuration of the power tool device disclosed in Patent Document 2 has a problem that the structure is complicated and the size thereof is increased.

  If a long lever is used, it is necessary to form a relatively large hole in the housing for entering and exiting the lever. Dust and sand are likely to enter through this hole, and malfunction of the lever is likely to occur.

  Patent Document 3 discloses an example of using a specially configured Torg switch with excellent dustproofness, but it is difficult to apply to a long lever structure, and in combination with a long lever, A structure that is dustproof and prevents malfunctions is desired.

  The same problem is common not only to the angle-type rotary impact tool but also to various power transmission tools using a lever switch.

The present invention has been made in view of the above circumstances, and provides a power tool and a power tool that can prevent a lever switch from being turned on by an unexpected operation of an operator and have versatility. Objective.
Another object of the present invention is to provide a power tool and a power tool that are provided with a lever switch and have excellent dust resistance.

The power tool according to the first aspect of the present invention is:
A housing;
A motor provided in the housing;
A drive mechanism provided in the housing, connected to the shaft of the motor, and supporting and driving a tip tool;
A plunger provided in the housing;
A switch for turning on and off the supply of electric power to the motor by the operation of the plunger;
A hole having a diameter larger than the cross section of the plunger and a shielding plate that opens and closes the hole are configured to be operable in the operation direction of the plunger, and in the state where the hole is opened by the shielding plate, An operation lever that operates so as to pass through the plunger and operates so as to interfere with the plunger in a state where the hole is closed by the shielding plate;
The switch is
A locking member that is provided at a position that does not interfere with the plunger, and moves in the operation direction of the plunger in contact with the operation lever in accordance with the operation of the operation lever;
A changeover switch that slides in a direction perpendicular to the operation direction of the plunger and reverses the rotation direction of the tip tool;
An electric tool having
When the lock member is in a state where the operation lever is operated and the switch is turned on,
An engagement portion provided on the lock member and an engaged portion engageable with the engagement portion provided on the change-over switch engage with each other to inhibit sliding of the change-over switch. To do.

For example, the engaging portion is a protrusion parallel to the operation direction of the plunger,
The engaged portion is a groove parallel to the moving direction of the lock member.

Furthermore, the changeover switch has two stop points, and slides between them.
Two of the grooves are formed apart by a sliding distance of the changeover switch,
When the changeover switch is at one stop point, one of the two grooves and the protrusion are opposed to each other, and the protrusion is fitted into one of the grooves by operation of the operation lever. When at the other stop point, the other one of the two grooves and the protrusion face each other, and the protrusion is fitted into the other one by the operation of the operation lever, and the changeover switch is The slide movement can be prohibited regardless of the position at which the two stop points are located.

  Furthermore, it is preferable to provide a biasing member that biases the lock member in a direction away from the changeover switch.

  For example, the urging member is constituted by a spring.

  In addition, a guide rail extending in the moving direction of the lock member is provided on one of the side surface of the lock member and the housing, and a protrusion that fits loosely on the guide rail is provided on the other side of the lock member and the housing. Is preferably provided.

  Further, it is preferable that the shielding plate is slidable in the longitudinal direction of the operation lever, and the width of the operation lever is larger than the width of the shielding plate.

Further, the housing includes an opening through which the plunger is inserted,
The operation lever may have a cantilever structure in which one end is swingably connected to the outer surface of the housing.

The power tool according to the second aspect of the present invention is:
A housing;
A motor housed inside the housing;
A tip tool rotatable by the rotational force of the motor;
A changeover switch capable of switching the rotation of the tip tool between forward rotation and reverse rotation;
A switch capable of connecting the motor and a power source;
A plunger capable of operating the switch;
A locking member engageable with the changeover switch;
A power tool having
The lock member can be operated independently of the plunger.

Furthermore, it has an operation lever capable of operating the plunger and the lock member,
It is preferable that the operation lever can perform a first operation for operating the plunger and the lock member and a second operation for operating the lock member without operating the plunger.

Furthermore, the operation lever has an engagement member that can be engaged with the plunger,
The engaging member is movable between a first position that engages with the plunger and a second position that does not engage with the plunger,
It is preferable that the first operation is possible when the engagement member is located at the first position, and the second operation is possible when the engagement member is located at the second position.

  Hereinafter, an electric power tool according to an embodiment of the present invention will be described with reference to FIGS. 1 to 9, taking an angle-type rotary impact tool including a lever switch as an example.

  1 is a perspective view of the electric power tool of the present embodiment, FIG. 2 is a cross-sectional view of the electric power tool of the present embodiment, FIG. 3 is a bottom view of the electric power tool of the present embodiment, and FIG. FIG. 5 is an exploded view, FIG. 5 is a perspective view and a side view of the switch body and the lock member of the electric tool of the present embodiment, FIG. 6 is a perspective view and a front view of the changeover switch of the electric tool of the present embodiment, and FIG. 8 is a front view of the switch body, the lock member, and the changeover switch of FIG. 8, FIG. 8 is a bottom view of a part of the housing and the lock member of the electric tool of this embodiment, and FIG. 9 is an illumination part of the electric tool of this embodiment. It is a side view.

  As shown in FIGS. 1 to 4, the electric power tool 1 according to the present embodiment includes a housing 10 and a hammer case 6 provided continuously to the housing 10. A power generation portion is mainly disposed in the housing 10, and a transmission mechanism for transmitting the rotational driving force to the tip tool is disposed in the hammer case 6. As shown in FIGS. 2 and 4, a lock member 4, an operation lever 5, and the like for controlling the electric power tool 1 are disposed on the outer surface portion of the housing 10.

  More specifically, the housing 10 is formed in a cylindrical shape as a whole, an opening 11a for connecting the storage battery 16 is provided at one end, and the hammer case 6 is connected at the other end. An opening 11b is provided. Further, on the side surface of the housing 10, a hole 12a through which a plunger 21 (to be described later) is inserted, a hole 12b through which the changeover switch 22 is inserted (see FIG. 3), and a protrusion 44 of the lock member 4 (FIGS. 5B and 5C). )) Is inserted through a hole 12c (see FIG. 3).

  Further, a connecting hole 14 is provided in a side surface near the end of the housing 10 on the storage battery 16 side, and the operation lever 5 is swingably connected. Further, as shown in FIG. 2, a groove 20 is provided between the operation lever 5 and the housing 10. The groove 20 is provided with a coil spring (tensile spring) 9 that biases the operation lever 5 toward the housing 10.

  The battery terminal 19, the substrate 17, the switch 2, and the motor 3 are arranged in this order from the opening 11 a on the storage battery 16 side of the housing 10 to the opening 11 b on the hammer case 6 side, and are fixed by screws or the like inside the housing 10. It is fixed by being fitted in a provided groove or the like. The battery terminal 19, the substrate 17, the switch 2, and the motor 3 are connected via wiring. When the switch 2 is turned on, electric power is supplied to the motor 3 via the storage battery 16, the battery terminal 19, the substrate 17, and the switch 2, and the motor 3 rotates. On the other hand, when the switch 2 is turned off, the supply of electric power to the motor 3 is cut off.

  Inside the housing 10, a rib 15 is provided between the opening 11a on the storage battery 16 side and the connection hole 14 of the operation lever. The ribs 15 fix the substrate 17 to the housing 10 and prevent the metal operation lever 5 and the substrate 17 from contacting each other. In addition, the board | substrate 17 is controlling the lighting of the LED light 7 mentioned later, extinction control, and the residual amount display function of the storage battery 16. FIG.

  The gear unit 8 includes a pinion 82, an idle gear 83, and a ring gear 84 connected to the shaft of the motor 3. The spindle 63, the hammer 64, and the anvil 65 are coaxially connected to the motor 3 through the gears from the motor 3. Arranged in order. The spindle 63 and the hammer 64 are connected by a cam mechanism constituted by a cam ball and a V-shaped cam groove, and the hammer 64 is provided so as to be able to advance and retreat with respect to the spindle 63. A coil spring 66 is provided between the spindle 63 and the hammer 64, and the hammer 64 is urged by the coil spring 66 in a direction away from the spindle 63 (pressed toward the anvil 65). At the end of the hammer 64 on the anvil 65 side, two convex portions 64a (see FIG. 4) projecting in parallel with the axis of the hammer 64 are provided. The anvil 65 is generally cylindrical and is provided so as to be rotatable with respect to the shaft, and at the end on the convex portion 64a side, a rod-like collision portion 65a extending in the radial direction with respect to the shaft is provided. The convex portion 64a and the collision portion 65a are provided so as to always come into contact with each other by the elastic force of the coil spring.

  A first bevel gear 67 is connected to the hammer 64 and the other end of the anvil 65 coaxially with the anvil 65, meshes with the first bevel gear 67, and rotates with respect to the rotation axis of the first bevel gear 67. Are arranged vertically, and a tip tool support 18 is provided at the other end of the second bevel gear 68. The gear portion 8, the spindle 63, the hammer 64, the anvil 65, the first bevel gear 67 and the second bevel gear 68 are accommodated in the hammer case 6, and the hammer case 6 is attached to the housing 10 in the opening 11b. It is connected. In addition, although the housing 10 of this embodiment is divided and comprised in the housing 10 and the hammer case 6, you may comprise the housing 10 and the hammer case 6 integrally. Further, the gear portion 8, the spindle 63, the hammer 64, the anvil 65, the first bevel gear 67 and the second bevel gear 68 accommodated in the hammer case 6 of the present embodiment correspond to the drive mechanism of the present invention. .

  The switch 2 is accommodated in the housing 10, and the plunger 21 which can be entered / exited is provided in the side surface. The plunger 21 protrudes outward through a hole 12a provided on the side surface of the housing 10, and is turned on / off by performing an entry / exit operation. When the switch 2 is turned on, a signal from the switch 2 by the power from the storage battery 16 is input to the above-described substrate 17 through the wiring. In addition, since the plunger 21 receives an elastic force in the direction away from the switch body by the elastic member inside the switch body, the housing 10 is always in a state where the plunger 21 receives a pressing force and does not enter the switch body side. It is maintained in a state of protruding outward. The switch 2 is provided with a long-shaped changeover switch 22 on a side surface parallel to the direction in which the plunger 21 enters and exits and perpendicular to the longitudinal direction of the housing 10. The change-over switch 22 is provided so as to be movable in the longitudinal direction, and as shown in FIG. 3, a hole 12b larger than the cross section of the long piece is provided on the side surface of the housing 10 corresponding to both ends thereof. It has been. One end of the changeover switch 22 in the longitudinal direction is provided so as to protrude outward from the housing 10 through the hole 12b. When the changeover switch 22 is translated in the longitudinal direction and one of the ends protrudes outward from the housing 10, a switching circuit is connected inside the switch 2, and the motor 3 rotates forward or backward. Inverted. Further, as shown in FIG. 6, on the plunger 21 side of the changeover switch 22, two grooves (engaged) for fitting (engaging) a projection (engaging portion) 44 provided on the lock member 4 described later. Part) 22a and a rib 22b separating the two grooves 22a are provided in parallel to the moving direction of the lock member 4.

  The lock member 4 is provided with a hole 41 having a diameter larger than that of the above-described cross section of the plunger 21 at the bottom of the bottomed bowl-like shape. The plunger 21 is disposed so as to face the hole 41. As shown in FIG. 8, a rail 42 is provided on the side surface of the lock member 4 from the opening to the bottom. A protrusion 10 a is provided on the housing 10 at a position corresponding to the position of the rail 42 in parallel with the direction in which the plunger 21 enters and exits. The protrusion 10 a of the housing 10 is loosely fitted on the rail 42 of the lock member 4. In this way, the lock member 4 can move in parallel with the direction in which the plunger 21 enters and exits. A coil spring 43 (compression spring) is provided along the side surface of the plunger 21 between the lock member 4 and the housing 10, and the lock member 4 receives elastic force in a direction away from the housing 10 at all times by the coil spring 43. ing. In the present embodiment, the coil spring 43 is provided between the housing 10 and the lock member 4. However, the coil spring 43 may be a leaf spring or the like, and moves the lock member 4 away from the housing 10. Any form may be used as long as it is an elastic member to be urged. Further, as shown in FIGS. 5 and 7, the lock member 4 is provided with a protrusion 44 extending from the side surface thereof so as to extend parallel to the movement direction of the plunger 21, and opposes the protrusion 44 of the housing 10. A hole 12c (see FIG. 3) is provided at the position. The protrusion 44 is always inserted into the hole 12c, and when the lock member 4 moves in parallel with the direction in which the plunger 21 enters and exits, the protrusion 44 advances and retreats inside the housing 10. The two grooves 22a provided in the changeover switch 22 are provided at positions where the protrusions 44 of the lock member 4 that have entered the housing 10 are fitted as shown in FIG. For this reason, when the groove 22a of the changeover switch 22 fits the protrusion 44 of the lock member 4, the changeover switch 22 is locked so that it cannot move in the longitudinal direction.

  As shown in FIGS. 2 and 3, the operation lever 5 is provided with a through hole 51 having a diameter larger than the cross section of the plunger 21 on the side surface of a long metal plate. A sliding type shielding plate (engagement member) 52 is provided in parallel to the direction. Through the sliding operation of the shielding plate 52, the through hole 51 can be freely opened and closed. And this operation lever 5 is connected with the connection hole 14 provided in the side surface of the housing 10 near the edge part by the side of the storage battery 16 so that rocking | fluctuation is possible. The through hole 51 is located in a region including the movable region of the plunger 21 in the swing region of the operation lever 5. Therefore, when the through hole 51 is opened by the shielding plate 52, the plunger 21 passes through the through hole 51 without interfering with the operation lever 5 in the swinging range of the operation lever 5. When the through hole 51 is closed by the shielding plate 52, the plunger 21 interferes (engages) with the shielding plate 52 in the swing range of the operation lever 5. For this reason, the plunger 21 is pressed by the swing of the operation lever 5 and enters and exits the switch body. Further, the shielding plate 52 is provided such that the width in the direction perpendicular to the swinging direction of the operation lever 5 is smaller than the width of the operation lever 5. Regardless of whether the through hole 51 is opened or closed by the shielding plate 52, the lock member 4 comes into contact with the operation lever 5 as the operation lever 5 swings, and swings in parallel with the plunger 21 entry / exit direction. . Here, although the lock member 4 is operated by the operation lever 5, the lock member 4 has a hole 41 having a diameter larger than that of the plunger 21, and can be operated independently of the plunger 21. As described above, the operation lever 5 receives the elastic force in the direction of being pulled toward the housing 10 by the coil spring 9 installed in the groove 20 of the housing 10. Since the elastic force by the coil spring 9 is set smaller than the elastic force by the coil spring 43 provided between the housing 10 and the lock member 4, the plunger 21 and the lock member 4 are driven by the elastic force of the coil spring 9. Never move.

  The LED light 7 is a light source that irradiates light to the working position by the tip tool. As shown in FIGS. 1, 3, and 9, the housing 10 is provided on the side surface of the housing 10 near the connecting portion with the hammer case 6. 10 is arranged so as to be in close contact with the inner surface of 10 and is provided at a position corresponding to the outside of the hammer case 6. As described above, the turning on / off of the LED light 7 is controlled by the substrate 17 housed in the housing 10, and power is supplied by the storage battery 16. Since the LED light 7 is disposed at a position where the central axis directly irradiates a tip tool or a tapping screw or the like, the LED light 7 is provided so that sufficient illuminance can be obtained even when an LED light with a small amount of light is used. .

  The electric power tool 1 according to the present embodiment includes a changeover switch 22 having two grooves 22a for fitting the protrusions 44 of the lock member 4 and a rib 22b separating the two grooves 22a, and a protrusion 44 extending from the side surface. And a locking member 4. When the supply of electric power to the motor 3 is turned on, the groove 22a of the changeover switch 22 fits the protrusion 44 of the lock member 4 and the changeover switch 22 is locked. Thus, according to the electric power tool 1 of the present embodiment, even with an inexpensive switch that does not have a function of locking the changeover switch to the switch itself, only the changeover switch 22 and the lock member 4 of the present embodiment are installed. Since the lock function of the changeover switch 22 can be provided, the versatility is excellent. In addition, since the power supply opening / closing operation and the forward / reverse reversal prevention of the tip tool can be performed simultaneously with a simple structure, the switch mechanism of the power tool of the present embodiment can be manufactured at low cost.

  Furthermore, the operation lever 5 in the electric tool 1 of the present embodiment is provided in a long plate shape, and is installed only by connecting one end to a connection hole 14 provided in the side surface of the housing 10 near the end on the storage battery 16 side. Therefore, it is not necessary to provide a large opening on the side surface of the housing for the operation lever 5 to enter and exit. Further, the hole 12c for the protrusion 44 of the lock member 4 provided in the housing 10 is a state in which the protrusion 44 of the lock member 4 is always inserted, and dust and sand are difficult to enter from this hole 12c. Excellent dust resistance.

  Furthermore, a rail 42 is provided on the side surface of the lock member 4 of the power tool 1 of the present embodiment so that the protrusion 10a provided on the housing 10 is loosely fitted. The lock member 4 having the protrusion 10a along the rail 42 is provided. Since it moves in parallel without tilting, it is possible to prevent malfunction of the electric power tool 1 due to tilting of the lock member 4. On the contrary, a protrusion is provided on the lock member 4 side and a rail is provided on the housing 10 side so that the protrusion of the lock member 4 and the rail of the housing 10 are loosely fitted. You may make it move along the rail provided in the housing 10. FIG.

  In addition, the plunger 21 of the electric power tool 1 according to the present embodiment is cylindrical, and the lock member 4 is provided with a circular hole 41 at the bottom. If the shape of the four-side hole 41 is made into an ellipse or a rectangle together with the plunger 21, the rotational movement of the lock member 4 is restricted along the side surface of the plunger 21. And the rail 42 provided in the lock member 4 can be removed.

  Furthermore, the LED light 7 of the electric power tool 1 of the present embodiment is disposed so as to be in close contact with the inner surface of the housing 10 and is provided at a position corresponding to the outer side of the hammer case 6. It is difficult for the LED light 7 to be contaminated by the lubricating grease filled inside.

  Next, operation | movement of the electric tool 1 of such a structure is demonstrated.

  When using the electric tool 1, the operator attaches the tip tool to the tip tool support 18. Then, the shielding plate 52 of the operation lever 5 is slid to the through hole 51 side to close the through hole 51 (first position), and the operation lever 5 is pressed to the housing 10 side. When the operation lever 5 pushes the plunger 21 by the operator's operation, the switch 2 is turned on, electric power is supplied from the storage battery 16 to the motor 3, and the motor 3 rotates. The rotational driving force of the motor 3 is transmitted to the tip tool via the drive mechanism. The rotational driving force of the motor 3 is transmitted to the anvil 65 by amplifying torque as a rotational impact force by the spindle 63 and the hammer 64. And it becomes possible to perform the fastening operation | work by a front-end tool, etc. with this rotational driving force. At this time, the lock member 4 arranged so as to surround the periphery of the plunger 21 is pushed by the operation lever 5 together with the plunger 21 and moves in parallel to the entering / exiting direction of the plunger 21. Then, the protrusion 44 provided to extend from the side surface of the lock member 4 enters the inside of the housing 10 and is fitted into one groove 22a of the changeover switch 22 so that the changeover switch 22 is locked and the changeover switch 22 is locked. Can no longer slide. Therefore, the forward / reverse rotation of the tip tool is not reversed while the tip tool is being rotationally driven. In this way, when the through hole 51 is closed by the shielding plate 52 (first position) and the operation lever 5 is pressed against the housing 10, the plunger 21 and the lock member 4 are operated. (First operation)

  When the operator releases his hand from the operation lever 5, the lock member 4 receives an elastic force in a direction away from the housing 10 due to the elastic force of the coil spring 43 provided between the housing 10 and the lock member 4. 5 is pushed away from the housing 10 by being pushed by the lock member 4. Since the protrusion 44 of the lock member 4 moves away from the groove 22a of the changeover switch, the changeover switch 22 is unlocked. Then, the reversing operation of the forward / reverse rotation can be performed by the sliding movement of the changeover switch 22. Further, since the plunger 21 moves in a direction protruding from the housing 10 to the outside, the switch 2 is turned off, the power supply from the storage battery 16 to the motor 3 is turned off, and the rotation of the tip tool is stopped.

  On the other hand, when the operator presses the operating lever 5 toward the housing 10 with the through hole 51 of the operating lever opened by the shielding plate 52 (second position), the plunger 21 passes through the through hole 51 of the operating lever 5. Since the operation lever 5 does not interfere with the plunger 21, the switch 2 is not turned on, and the power supply from the storage battery 16 to the motor 3 is not performed. At this time, the lock member 4 comes into contact with the operation lever 5 as the operation lever 5 swings, and moves parallel to the direction in which the plunger 21 enters and exits. Therefore, the changeover switch 22 is locked without the motor 3 operating. . Thus, when the through hole 51 is opened by the shielding plate 52 (second position) and the operation lever 5 is pressed against the housing 10, the plunger 21 is not operated, and only the lock member 4 is operated. (Second operation)

  As described above, in the electric power tool 1 according to the present embodiment, the operation lever 5 is provided with the through hole 51 and the shielding plate 52 that opens and closes the through hole 51 in a sliding manner. When this is used, the through hole 51 is closed by the shielding plate 52. Then, the tip tool is driven by pressing the operation lever 5, and the changeover switch 22 is locked to prevent the tip tool from being reversed. Accordingly, even when the operator is working or when the power tool 1 is unexpectedly touched, the forward / reverse rotation is not reversed, so that the operation stability is excellent. Yes. Moreover, the workability | operativity fall by unexpected reversal of forward / reverse rotation can also be prevented.

  Further, when the electric power tool 1 is not used, if the shielding plate 52 is slid to open the through hole 51, the operation lever 5 does not interfere with the plunger 21, and power is not supplied from the storage battery 16 to the motor 3. . Therefore, even when the operation lever 5 is unexpectedly touched during transportation, the power supply is not turned on, and the object to be machined can be prevented from being damaged by the rotationally driven tip tool. ing. It is also possible to prevent the battery power from being consumed wastefully.

  Furthermore, the electric power tool 1 according to the present embodiment mechanically interlocks the operation of turning on / off the rotation of the motor 3 with the operation lever 5 and the operation of locking the reversal of the forward / reverse rotation of the tip tool. Can do. Further, the switch 2 and the changeover switch 22 of this embodiment have a simple structure. Therefore, the apparatus can be applied without increasing the size, and malfunction can be prevented without using a special switch.

  Furthermore, the side surface of the housing 10 of the electric power tool 1 of the present embodiment has a hole 12a through which the plunger 21 enters and exits, a hole 12b through which both ends of the changeover switch 22 project, and a hole through which the projection 44 of the lock member 4 advances and retreats. Although 12c is provided, since each hole 12a, 12b, and 12c is the state by which the corresponding component was always inserted, it can be hold | maintained in the substantially obstruct | occluded state. Accordingly, it is not necessary to provide the housing 10 with a hole for entering and exiting the operation lever 5, and the dustproof property is excellent.

  In the present embodiment, the effect of the present invention has been described by quoting the angle type rotary impact tool, but the power supply to the motor is turned on / off not only by the angle type rotary impact tool but also by the operation lever. The present invention can be applied to any type of power tool as long as it is a rotary tool in the form. For example, if the present invention is applied to a normal lever switch type rotary impact tool in which the rotating shaft of the motor and the tip tool are arranged in a straight line, excellent dust resistance and operational stability can be achieved without increasing the size of the electric tool. Obtainable. In addition, even when the present invention is applied to an electric tool that does not have a reversing function for forward / reverse rotation, excellent operation stability can be obtained by opening / closing operation by a shielding plate of a hole provided in the operation lever, and dust resistance Can be obtained.

  Further, the operation lever 5 of the electric power tool 1 according to the present embodiment is connected to a connection hole 14 provided in the housing 10 so that one end of the operation lever 5 can swing, and the operation lever 5 swings to lock the lock member 4 and the plunger. However, the present invention is not limited to this, as long as it operates in the movement direction of the lock member and the plunger. For example, the operation lever may be supported at both ends by an elastic material or the like and interfere with the lock member and the plunger by being pushed toward the lock member and the plunger.

  Moreover, in this embodiment, although invention was demonstrated based on the electric tool 1, even if a power source is other than a rechargeable battery, there can exist the effect of this invention. For example, a commercial AC power supply may be used. Further, it may be a power source such as an engine, or compressed air may be used.

It is a perspective view of the electric tool of this embodiment. It is sectional drawing of the electric tool of this embodiment. It is a bottom view of the electric tool of this embodiment. It is an exploded view of the electric tool of this embodiment. (A) is a perspective view of a switch body and a lock member of the electric power tool of this embodiment, (b) is a perspective view of a lock member of the electric power tool of this embodiment, and (c) is an electric power tool of this embodiment. It is a side view of a switch main body and a lock member. (A) is a perspective view of the changeover switch of the electric tool of this embodiment, and (b) is a front view. (A) And (b) is a front view of the switch main body, lock member, and changeover switch of the electric tool of this embodiment. It is a bottom view of a part of housing of an electric tool of this embodiment, and a lock member. It is a side view of the illumination part of the electric tool of this embodiment.

Explanation of symbols

1: Electric tool 2: Switch 3: Motor 4: Lock member 5: Operation lever 6: Hammer case 7: LED light 8: Gear portion 9: Coil spring 10: Housing 10a: Projection 11a, 11b: Opening 12a, 12b, 12c: Hole 14: Connection hole 15: Rib 16: Storage battery 17: Substrate 18: Tip tool support 19: Battery terminal 20: Groove 21: Plunger 22: Changeover switch 22a: Groove (engaged part)
22b: rib 41: hole 42: rail 43: coil spring 44: protrusion (engagement portion)
51: Through-hole 52: Shield plate (engagement member)
63: Spindle 64: Hammer 64a: Convex part 65: Anvil 65a: Collision part 66: Coil spring 67: First bevel gear 68: Second bevel gear 82: Pinion 83: Idle gear 84: Ring gear

Claims (11)

A housing;
A motor provided in the housing;
A drive mechanism provided in the housing, connected to the shaft of the motor, and driving and supporting a tip tool;
A plunger provided in the housing;
A switch for turning on and off the supply of electric power to the motor by the operation of the plunger;
A hole having a diameter larger than the cross section of the plunger and a shielding plate that opens and closes the hole are configured to be operable in the operation direction of the plunger, and in the state where the hole is opened by the shielding plate, An operation lever that operates so that the plunger passes, and operates so as to interfere with the plunger in a state where the hole is closed by the shielding plate;
The switch is
A locking member that is provided at a position that does not interfere with the plunger and that moves in the operation direction of the plunger in contact with the operation lever as the operation lever moves;
A changeover switch that slides in a direction perpendicular to the operation direction of the plunger and reverses the rotation direction of the tip tool;
An electric tool having
When the lock member is in a state where the operation lever is operated and the switch is turned on,
An engaging portion provided in the lock member and an engaged portion engageable with the engaging portion provided in the changeover switch are engaged, and the slide of the changeover switch is prohibited;
An electric tool characterized by that. The engaging portion is a protrusion parallel to the operation direction of the plunger,
The engaged portion is a groove parallel to the moving direction of the lock member.
The power tool according to claim 1. The changeover switch has two stop points, slides between them,
Two of the grooves are formed apart by a sliding distance of the changeover switch,
When the changeover switch is at one stop point, one of the two grooves and the protrusion are opposed to each other, and the protrusion is fitted into one of the grooves by operation of the operation lever. When at the other stop point, the other one of the two grooves and the protrusion face each other, and the protrusion is fitted into the other one by the operation of the operation lever, and the changeover switch is Slide movement is prohibited regardless of where the two stop points are located.
The power tool according to claim 2, wherein: A biasing member that biases the lock member in a direction away from the changeover switch;
The power tool according to claim 2 or 3, wherein   The power tool according to claim 4, wherein the biasing member includes a spring. A guide rail extending in the moving direction of the lock member is provided on one side of the lock member and the housing, and a protrusion that fits loosely on the guide rail is provided on the other side of the lock member and the housing. Being
The power tool according to any one of claims 2 to 5, wherein the power tool is provided. The shielding plate is slidably provided in the longitudinal direction of the operation lever, and the width of the operation lever is larger than the width of the shielding plate;
The power tool according to claim 1, wherein the power tool is a power tool. The housing includes an opening through which the plunger is inserted,
The operation lever has a cantilever structure in which one end portion is swingably connected to the outer surface portion of the housing.
The power tool according to claim 1, wherein the power tool is a power tool. A housing;
A motor housed inside the housing;
A tip tool rotatable by the rotational force of the motor;
A changeover switch capable of switching the rotation of the tip tool between forward rotation and reverse rotation;
A switch capable of connecting the motor and a power source;
A plunger capable of operating the switch;
A locking member engageable with the changeover switch;
A power tool having
The lock member can be operated independently of the plunger.
A power tool characterized by that. An operation lever capable of operating the plunger and the lock member;
The operation lever performs a first operation for operating the plunger and the lock member, and a second operation for operating the lock member without operating the plunger.
The power tool according to claim 9, wherein the power tool can be used. The operating lever has an engaging member that can be engaged with the plunger,
The engaging member is movable between a first position that engages with the plunger and a second position that does not engage with the plunger,
The first operation is possible when the engagement member is located at the first position, and the second operation is possible when the engagement member is located at the second position.
The power tool according to claim 10.

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