Patent Description:
Patent Document <NUM> discloses an example of a driving tool including an ejection unit, a striking unit configured to strike a fastener supplied to the ejection unit, a first push lever capable of moving with respect to the ejection unit, and a second push lever capable of moving in conjunction with the first push lever. The driving tool disclosed in Patent Document <NUM> includes a main body, an ejection unit, a striking unit, a cylinder, a trigger, a first push lever, a second push lever, and a magazine. The ejection unit is provided on the main body, and the first push lever and the second push lever can move with respect to the ejection unit. The magazine stores fasteners and the fasteners are sent to the ejection unit. The cylinder is provided in the main body and the striking unit can be actuated along the cylinder.

In the driving tool disclosed in Patent Document <NUM>, compressed air is supplied into the main body. When the trigger is operated and the ejection unit is pressed to the workpiece, the compressed air is supplied into the cylinder. The striking unit is actuated by the pressure of the compressed air in the cylinder and strikes the fastener sent to the ejection unit. In the driving tool disclosed in Patent Document <NUM>, the driving depth of the fastener can be adjusted by adjusting the positions of the first push lever and the second push lever with respect to the ejection unit.

Another driving tool is known from JPH0549278U. It discloses a nail driving depth adjustment device for a driving tool. The device includes a contact arm and a link. The contact arm is arranged between a lower driver guide cover and the contact arm guide, so as to be vertically slidable within a certain range.

The inventors of this application have recognized the problem that the number of components increases when a member for setting a moving direction of a push lever with respect to the ejection unit is provided for each of the first push lever and the second push lever.

An object of the present invention is to provide a driving tool capable of suppressing the increase in the number of components.

A driving tool according to an embodiment includes an ejection unit to which a fastener is supplied and a striking unit capable of moving with respect to the ejection unit so as to drive the fastener supplied to the ejection unit into a workpiece, and the driving tool further includes a first push lever provided in the ejection unit, capable of contacting with and separating from the workpiece, and capable of moving with respect to the ejection unit, a second push lever provided in the ejection unit and capable of moving in conjunction with the first push lever, and a guide member having a function to guide a movement of the first push lever and the second push lever with respect to the ejection unit in a predetermined direction.

In the driving tool according to an embodiment, the moving directions of the first push lever and the second lever with respect to the ejection unit are set by a shared guide member. Therefore, it is possible to suppress the increase in the number of components of the driving tool.

An embodiment of the driving tool according to the present invention will be described with reference to drawings.

A driving tool <NUM> shown in <FIG> includes a housing <NUM>, a striking unit <NUM>, a magazine <NUM>, an electric motor <NUM>, a conversion mechanism <NUM>, a control unit <NUM>, a battery pack <NUM> as a power supply unit, and a weight <NUM>. The housing <NUM> has a cylindrical main body <NUM>, a handle <NUM> connected to the main body <NUM>, and a motor case <NUM> connected to the main body <NUM>. A mounting unit <NUM> is connected to the handle <NUM> and the motor case <NUM>.

The striking unit <NUM> has a plunger <NUM> arranged in the main body <NUM> and a driver blade <NUM> fixed to the plunger <NUM>. The driver blade <NUM> is made of metal. A guide shaft <NUM> is fixed in the main body <NUM>. A center line A1 is the center of the guide shaft <NUM>. The plunger <NUM> is attached to the guide shaft <NUM>, and the striking unit <NUM> can move in the direction along the center line A1.

An ejection unit <NUM> is provided outside the main body <NUM> and is attached to the main body <NUM>. The ejection unit <NUM> can be defined as a nose unit. The ejection unit <NUM> has a blade guide <NUM>, a magazine plate <NUM>, and a cover <NUM>. The blade guide <NUM> may made of either metal or synthetic resin. The magazine plate <NUM> may be made of metal or synthetic resin. The cover <NUM> may be made of metal or synthetic resin. An ejection path <NUM> is formed of the blade guide <NUM> and the magazine plate <NUM>. The ejection path <NUM> may be any one of a groove, a passage, a hole, and a space. The driver blade <NUM> can move in the ejection path <NUM>.

As shown in <FIG> and <FIG>, a first push lever <NUM> is attached to the ejection unit <NUM>. The first push lever <NUM> can move and stop with respect to the ejection unit <NUM>. By contacting with the driver blade <NUM>, the ejection unit <NUM> prevents the driver blade <NUM> from moving in a direction intersecting the center line A1. The magazine <NUM> is supported by the ejection unit <NUM> and the housing <NUM>.

The weight <NUM> shown in <FIG> suppresses the recoil received by the housing <NUM>. The weight <NUM> is made of metal as an example. The weight <NUM> is attached to the guide shaft <NUM>. A weight arm portion <NUM> is provided on the weight <NUM>. The weight <NUM> is attached to the guide shaft <NUM>. The weight <NUM> can move in the direction along the center line A1. The weight <NUM> has a protrusion 18A protruding from the outer surface.

A metal spring <NUM> is arranged in the main body <NUM>, and the spring <NUM> is arranged between the plunger <NUM> and the weight <NUM> in the direction along the center line A1. The plunger <NUM> receives a biasing force in a first direction D1 toward the ejection unit <NUM> from the spring <NUM> in the direction along the center line A1. The weight <NUM> receives a biasing force in a second direction D2 away from the ejection unit <NUM> from the spring <NUM> in the direction along the center line A1. The first direction D1 and the second direction D2 are opposite to each other. A weight bumper <NUM> and a plunger bumper <NUM> are provided in the main body <NUM>. Both the weight bumper <NUM> and the plunger bumper <NUM> are made of synthetic rubber.

In <FIG>, the movement of the striking unit <NUM>, the plunger <NUM>, or the weight <NUM> in the first direction D1 is referred to as the downward movement. The movement of the striking unit <NUM>, the plunger <NUM>, or the weight <NUM> in the second direction D2 is referred to as the upward movement. Each of the striking unit <NUM> and the weight <NUM> can reciprocate in the direction along the center line A1.

The battery pack <NUM> can be detachably attached to the mounting unit <NUM>. The battery pack <NUM> has a storage case <NUM> and a plurality of battery cells stored in the storage case <NUM>. The battery cell is a secondary battery that can be charged and discharged, and any of a lithium ion battery, a nickel hydrogen battery, a lithium ion polymer battery, and a nickel cadmium battery can be used as the battery cell. The battery pack <NUM> is a DC power supply, and a voltage is applied from the battery pack <NUM> to the electric motor <NUM>.

The control unit <NUM> shown in <FIG> is provided in the mounting unit <NUM>, and the control unit <NUM> is a microcomputer having an input port, an output port, an arithmetic processing unit, and a storage unit. A trigger <NUM> and a trigger switch <NUM> shown in <FIG> are provided on the handle <NUM>, and the trigger switch <NUM> is turned on when a user applies an operation force to the trigger <NUM>. When the user releases the operation force applied to the trigger <NUM>, the trigger switch <NUM> is turned off. An inverter circuit <NUM> shown in <FIG> is provided in the motor case <NUM>. The inverter circuit <NUM> includes a plurality of switching elements that can be turned on and off.

A position detection sensor <NUM> is provided in the housing <NUM>. The position detection sensor <NUM> is, for example, a micro switch. When the protrusion 18A of the weight <NUM> comes into contact with the position detection sensor <NUM>, the position detection sensor <NUM> is turned on. When the protrusion 18A is separated from the position detection sensor <NUM>, the position detection sensor <NUM> is turned off. The signal output from the position detection sensor <NUM> is input to the control unit <NUM>. The control unit <NUM> processes the signal of the position detection sensor <NUM> to estimate the positions of the plunger <NUM> and the weight <NUM> in the direction along the center line A1.

A push lever switch <NUM> is provided in the magazine <NUM>. The push lever switch <NUM> is a contact switch having a contact piece 73A. The push lever switch <NUM> outputs signals by detecting that the first push lever <NUM> is moved by being pressed to the workpiece W1 and that the first push lever <NUM> is moved by being separated from the workpiece W1. The control unit <NUM> receives the signal of the trigger switch <NUM>, the signal of the push lever switch <NUM>, and the signal of the position detection sensor <NUM>, and outputs a signal for controlling the inverter circuit <NUM>.

The electric motor <NUM> has a rotor 14A and a stator 14B, and a motor shaft <NUM> is attached to the rotor 14A. In the electric motor <NUM>, a voltage is applied from the battery pack <NUM> to rotate the motor shaft <NUM>. The motor shaft <NUM> is connected to a rotating member <NUM> via a decelerator <NUM>. The electric motor <NUM>, the motor shaft <NUM>, and the rotating member <NUM> are arranged concentrically around a center line A2. The center line A2 is arranged so as to intersect the center line A1.

The conversion mechanism <NUM> converts the rotational force of the rotating member <NUM> into the moving force of the striking unit <NUM> and the moving force of the weight <NUM>. The conversion mechanism <NUM> has a first gear <NUM>, a second gear <NUM>, and a third gear <NUM>. A cam roller <NUM> is provided on the first gear <NUM>, a cam roller <NUM> is provided on the second gear <NUM>, and a cam roller <NUM> is provided on the third gear <NUM>.

When a voltage is applied from the battery pack <NUM> to the electric motor <NUM> and the motor shaft <NUM> rotates forward, the rotational force of the motor shaft <NUM> is transmitted to the first gear <NUM> via a decelerator <NUM>. The rotational force of the first gear <NUM> is transmitted to the third gear <NUM> via the second gear <NUM>.

A first engaging portion <NUM> is provided on the plunger <NUM>. The cam rollers <NUM> and <NUM> can be engaged with and released from the first engaging portion <NUM>. A second engaging portion <NUM> is provided on the weight <NUM>. The cam roller <NUM> can be engaged with and released from the second engaging portion <NUM>.

The magazine <NUM> has a main body <NUM> and a guide portion <NUM>, and the main body <NUM> is fixed to the housing <NUM> and the ejection unit <NUM>. The push lever switch <NUM> is attached to the main body <NUM>. The guide portion <NUM> can move and stop with respect to the main body <NUM> in the direction along the center line A2. A lock lever <NUM> is provided on the guide portion <NUM>. When a user operates the lock lever <NUM>, the guide portion <NUM> becomes movable with respect to the main body <NUM>. The guide portion <NUM> has the magazine plate <NUM>, and when the guide portion <NUM> is positioned to the main body <NUM>, the magazine plate <NUM> comes into contact with the blade guide <NUM>. A storage chamber is formed between the main body <NUM> and the guide portion <NUM>. The storage chamber can store a plurality of fasteners <NUM> in a state of being arranged in a row. The adjacent fasteners <NUM> are connected by an adhesive.

A feeder <NUM> is provided in the magazine <NUM>. The feeder <NUM> is biased by a biasing force of a metal spring <NUM> in a fifth direction B1 toward the ejection unit <NUM>. The fifth direction B1 is a direction along the center line A2. The feeder <NUM> sends the fastener <NUM> stored in the magazine <NUM> to the ejection path <NUM>. The fastener <NUM> moves along the guide portion <NUM>. A contact member <NUM> is attached to the magazine <NUM>. The contact member <NUM> can be defined as a base. The contact member <NUM> is arranged at a distance from the ejection unit <NUM> in the sending direction of the fastener <NUM>.

Next, an example of using the driving tool <NUM> will be described. The control unit <NUM> controls such that electric power is not supplied to the electric motor <NUM> when at least one of the trigger switch <NUM> and the push lever switch <NUM> is off. The striking unit <NUM> is stopped at a standby position. Here, an example in which the plunger <NUM> is separated from the plunger bumper <NUM> when the striking unit <NUM> is stopped at the standby position will be described.

When a user applies an operation force to the trigger <NUM>, the trigger switch <NUM> is turned on, and when the first push lever <NUM> is pressed to the workpiece W1, the push lever switch <NUM> is turned on. Then, the control unit <NUM> applies a voltage to the electric motor <NUM> to rotate the motor shaft <NUM>. The rotational force of the motor shaft <NUM> is amplified by the decelerator <NUM> and transmitted to the first gear <NUM>, and the first gear <NUM>, the second gear <NUM>, and the third gear <NUM> rotate.

When at least one of the cam rollers <NUM> and <NUM> engages with the first engaging portion <NUM>, the striking unit <NUM> moves upward from the standby position. Further, when the cam roller <NUM> of the third gear <NUM> engages with the second engaging portion <NUM>, the weight <NUM> moves downward.

Next, when both the cam rollers <NUM> and <NUM> are released from the first engaging portion <NUM>, the striking unit <NUM> moves downward by the biasing force of the spring <NUM>. Further, when the cam roller <NUM> is released from the second engaging portion <NUM>, the weight <NUM> moves upward by the biasing force of the spring <NUM>. The driver blade <NUM> strikes one fastener <NUM> that has reached the ejection path <NUM> from the magazine <NUM>, and the fastener <NUM> is driven into the workpiece W1.

After the driver blade <NUM> strikes the fastener <NUM>, the plunger <NUM> collides with the plunger bumper <NUM>. The plunger bumper <NUM> absorbs a part of the kinetic energy of the striking unit <NUM>. Further, the weight <NUM> collides with the weight bumper <NUM>. The weight bumper <NUM> absorbs a part of the kinetic energy of the weight <NUM>. As described above, when the striking unit <NUM> moves in the first direction D1 and strikes the fastener <NUM>, the weight <NUM> can reduce the recoil when the striking unit <NUM> strikes the fastener <NUM>.

The control unit <NUM> rotates the electric motor <NUM> even after the user separates the first push lever <NUM> from the workpiece W1 and the trigger switch <NUM> is turned off, after the fastener <NUM> is driven into the workpiece W1. Then, the striking unit <NUM> moves upward from the bottom dead center against the biasing force of the spring <NUM>, and the plunger <NUM> is separated from the plunger bumper <NUM>. When the control unit <NUM> detects that the striking unit <NUM> has reached the standby position, the control unit <NUM> stops the electric motor <NUM>.

The user can press the first push lever <NUM> to the workpiece W1 and bring the contact member <NUM> into contact with the workpiece W1. Namely, the first push lever <NUM> and the contact member <NUM> come into contact with the workpiece W1 at two locations spaced apart in the sending direction of the fastener <NUM>. Note that the user can also use the driving tool <NUM> in the state where the contact member <NUM> is detached from the magazine <NUM>.

The ejection unit <NUM> in this embodiment has the following configuration. As shown in <FIG>, <FIG>, and <FIG>, the blade guide <NUM> has a stopper <NUM>, protrusions <NUM> and <NUM>, and guide portions <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, and <NUM>. In the direction along the center line A1, the guide portions <NUM> and <NUM> are arranged in the same range and the guide portions <NUM> and <NUM> are arranged in the same range. The guide portions <NUM> and <NUM> and the guide portions <NUM> and <NUM> are arranged at intervals in the direction along the center line A1. The guide portions <NUM>, <NUM>, <NUM>, <NUM>, and <NUM> are flat surfaces and are located on the same plane.

The guide portions <NUM> and <NUM> and the guide portions <NUM> and <NUM> are arranged at intervals in the direction along the center line A1. The guide portion <NUM> and the guide portion <NUM> are arranged so as to be separated across the center line A1. The guide portion <NUM> and the guide portion <NUM> are arranged so as to be separated across the center line A1.

Further, a plurality of mounting holes <NUM> are provided in the blade guide <NUM>. Screw members <NUM> shown in <FIG> and <FIG> are arranged in the mounting holes <NUM>, respectively. The screw members <NUM> are tightened, so that the cover <NUM> and the blade guide <NUM> are fixed to the main body <NUM>. The first push lever <NUM> is arranged between the blade guide <NUM> and the cover <NUM> in the direction along the center line A2.

As shown in <FIG> and <FIG>, the first push lever <NUM> has a plate-shaped main body 74A, an arm <NUM>, and a head portion 74B. The arm <NUM> protrudes from the main body 74A in a direction intersecting the center line A1. The head portion 74B is connected to the main body 74A. The head portion 74B has an end portion 74C. The main body 74A of the first push lever <NUM> is arranged between the guide portion <NUM> and the guide portion <NUM>, and is arranged between the guide portion <NUM> and the guide portion <NUM>.

A shaft hole <NUM> is provided in the arm <NUM>. A female screw is provided on an inner surface of the shaft hole <NUM>. A guide hole <NUM> is provided in the first push lever <NUM>. The protrusion <NUM> is located in the guide hole <NUM>. When the first push lever <NUM> moves in the direction along the center line A1 with respect to the blade guide <NUM>, the protrusion <NUM> moves in the guide hole <NUM>. A spring <NUM> is arranged in the guide hole <NUM>. The spring <NUM> is compressed in contact with the protrusion <NUM>, and the spring <NUM> biases the first push lever <NUM> in a third direction D4 so as to separate it from the main body <NUM>.

An adjuster <NUM> is arranged between the arm <NUM> and the protrusion <NUM>. The adjuster <NUM> has a shaft portion <NUM>. A male screw is provided on an outer surface of the shaft portion <NUM>. The adjuster <NUM> is a cylindrical dial. The shaft portion <NUM> is arranged in the shaft hole <NUM>. When the user rotates the adjuster <NUM>, the adjuster <NUM> moves in the direction along the center line A1 with respect to the arm <NUM>.

As shown in <FIG>, the adjuster <NUM> has a pin <NUM>. The second push lever <NUM> is arranged between the adjuster <NUM> and the protrusion <NUM>. The second push lever <NUM> has an arm 135A and a shaft hole <NUM>. The arm 135A protrudes from the second push lever <NUM> in a direction intersecting the center line A1. Further, the pin <NUM> is arranged in the shaft hole <NUM>. A spring <NUM> is provided between the protrusion <NUM> and the second push lever <NUM>. The spring <NUM> is compressed in the direction along the center line A1, and the spring <NUM> presses the second push lever <NUM> to the adjuster <NUM>. The second push lever <NUM> can move in the direction along the center line A1 with respect to the blade guide <NUM>. When the second push lever <NUM> moves, the push lever switch <NUM> is switched on and off.

The functions and operations of the first push lever <NUM>, the second push lever <NUM>, and the adjuster <NUM> are as follows. The first push lever <NUM> is biased by the force of the spring <NUM> in the third direction D4 in any of the cases in which the head portion 74B is separated from the workpiece W1 and in which the head portion 74B is pressed to the workpiece W1.

Also, the second push lever <NUM> is biased by the force of the spring <NUM> in the third direction D4 and is in contact with the adjuster <NUM> in any of the cases in which the head portion 74B is separated from the workpiece W1 and in which the head portion 74B is pressed to the workpiece W1.

First, the case in which the head portion 74B of the first push lever <NUM> is separated from the workpiece W1 will be described. The force of the spring <NUM> is transmitted to the shaft portion <NUM> via the first push lever <NUM>, and the shaft portion <NUM> is in contact with the stopper <NUM> as shown in <FIG>. Namely, the first push lever <NUM> is stopped at the initial position. Further, the end portion 74C is separated from the blade guide <NUM>. When the first push lever <NUM> is stopped at the initial position, the second push lever <NUM> is stopped at a position separated from the contact piece 73A, that is, at the initial position as shown in <FIG>. Therefore, the push lever switch <NUM> is off.

Then, when the head portion 74B is pressed to the workpiece W1, the first push lever <NUM> moves in a forth direction D5 with respect to the ejection unit <NUM> against the force of the spring <NUM>. Therefore, the shaft portion <NUM> is separated from the stopper <NUM>. The fourth direction D5 is the direction along the center line A1 and is opposite to the third direction D4.

When the first push lever <NUM> moves in the fourth direction D5, the moving force of the first push lever <NUM> is transmitted to the second push lever <NUM> via the adjuster <NUM>. Therefore, the second push lever <NUM> moves in the fourth direction D5 against the force of the spring <NUM>. When the second push lever <NUM> comes into contact with the contact piece 73A and the contact piece 73A is actuated, the push lever switch <NUM> is switched from off to on. Then, the first push lever <NUM> stops when the end portion 74C comes into contact with the blade guide <NUM>. Namely, the first push lever <NUM> stops at the actuated position. When the first push lever <NUM> stops at the actuated position, the second push lever <NUM> stops at the actuated position.

When the head portion 74B is separated from the workpiece W1 in the state where the first push lever <NUM> is stopped at the actuated position, the first push lever <NUM> moves from the actuated position in the third direction D4 by the force of the spring <NUM>. Therefore, the end portion 74C is separated from the blade guide <NUM>.

Further, when the first push lever <NUM> moves from the actuated position in the third direction D4, the second push lever <NUM> maintains the state of being in contact with the adjuster <NUM>, and moves from the actuated position in the third direction D4 by the force of the spring <NUM>. When the second push lever <NUM> is separated from the contact piece 73A, the push lever switch <NUM> is switched from on to off. When the shaft portion <NUM> comes into contact with the stopper <NUM>, the first push lever <NUM> stops at the initial position. When the first push lever <NUM> is stopped at the initial position, the head portion 74B protrudes by a length L1 with respect to a tip 105A of the magazine plate <NUM>. The length L1 is the length in the direction along the center line A1. Further, the second push lever <NUM> stops at the initial position.

When the user rotates the adjuster <NUM> in the state where the head portion 74B is separated from the workpiece W1, the first push lever <NUM> moves in the direction along the center line A1 with respect to the ejection unit <NUM> in the state where the arm <NUM> and the shaft portion <NUM> are connected to each other. When the user switches the direction in which the adjuster <NUM> is rotated, the direction in which the first push lever <NUM> moves is switched between the third direction D4 and the fourth direction D5. Namely, when the user rotates the adjuster <NUM>, the length L1 can be adjusted.

Further, the amount of movement of the first push lever <NUM> from the initial position to the actuated position is determined in accordance with the length L1. As the length L1 increases, the amount of movement of the first push lever <NUM> from the initial position to the actuated position increases. Therefore, the user can adjust the position of the head portion 74B of the first push lever <NUM> with respect to the tip 105A of the magazine plate <NUM> in the direction along the center line A1 by rotating the adjuster <NUM>.

Further, in the state where the striking unit <NUM> reaches the bottom dead center, the tip of the driver blade <NUM> is located at the tip 105A of the magazine plate <NUM>. Namely, the user can adjust the driving amount of the fastener <NUM> into the workpiece W1 by adjusting the length L1 at which the head portion 74B protrudes from the tip 105A.

The driving tool <NUM> includes a positioning mechanism. The positioning mechanism functions to set the movement of the first push lever <NUM> and the second push lever <NUM> with respect to the ejection unit <NUM> in a predetermined direction. <FIG> is a three-dimensional coordinate system showing an example in which the movement of the first push lever <NUM> and the second push lever <NUM> with respect to the ejection unit <NUM> is set in a predetermined direction. <FIG> shows a first plane <NUM>, a second plane <NUM>, a first axis Z1, a second axis Y1, and a third axis X1. The first plane <NUM> is perpendicular to the second plane <NUM>. The third axis X1 corresponds to the center line A1, and the first axis Z1 corresponds to the center line A2. The second axis Y1 is an axis corresponding to the left-right direction in <FIG> and <FIG>. The first axis Z1 is located along the first plane <NUM>, and the second axis Y1 is located along the second plane <NUM>. The third axis X1 passes through an intersection of the first plane <NUM> and the second plane <NUM>.

The coordinate system shown in <FIG> is an example in which the angle formed between the first axis Z1 and the third axis X1 in the first plane <NUM> is <NUM> degrees. The coordinate system shown in <FIG> is an example in which the angle formed between the second axis Y1 and the third axis X1 in the second plane <NUM> is <NUM> degrees.

The present embodiment discloses the specific example <NUM>, the specific example <NUM>, and the specific example <NUM> of the positioning mechanism.

By contacting with the guide portions <NUM>, <NUM>, <NUM>, and <NUM> and the cover <NUM>, respectively, the first push lever <NUM> is restricted from moving in the direction intersecting the third axis X1 in the first plane <NUM>. By contacting with the guide portions <NUM>, <NUM>, <NUM>, and <NUM>, respectively, the first push lever <NUM> is restricted from moving in the direction intersecting the third axis X1 in the second plane <NUM>.

Further, by contacting the arm 135A with the guide portion <NUM> and the cover <NUM>, the second push lever <NUM> is restricted from moving in the direction intersecting the third axis X1 in the first plane <NUM>. By contacting the arm 135A with the guide portion <NUM>, the second push lever <NUM> is restricted from moving in the direction intersecting the third axis X1 in the second plane <NUM>.

Namely, the blade guide <NUM> and the cover <NUM> both have a function as a member for positioning the first push lever <NUM> and the second push lever <NUM> with respect to the ejection unit <NUM>. Therefore, it is not necessary to separately provide the positioning member of the first push lever <NUM> and the positioning member of the second push lever <NUM>. Accordingly, it is possible to suppress the increase in the number of components of the driving tool <NUM> and reduce the size, weight, and cost of the driving tool <NUM>.

Further, the first push lever <NUM> and the second push lever <NUM> are both positioned such that the moving directions thereof are along the third axis X1. Therefore, it is possible to prevent the moving force of one element from acting as a moment that rotates the other element with a predetermined position as a fulcrum. Accordingly, it is possible to suppress the increase in the actuation of the first push lever <NUM> and the actuation resistance of the second push lever <NUM>, respectively. Further, it is possible to suppress the increase in the contact resistance between the adjuster <NUM> and the second push lever <NUM>, and it is possible to suppress the decrease in the operability of the adjuster <NUM>.

Also, the guide portions <NUM>, <NUM>, <NUM>, <NUM>, and <NUM> are located on the same plane. Therefore, it is possible to reduce the sliding resistance in the case where the first push lever <NUM> and the second push lever <NUM> move in the direction along the third axis X1.

The guide portions <NUM> and <NUM> and the guide portions <NUM> and <NUM> position the first push lever <NUM> by coming into contact with it in the two ranges spaced apart in the direction along the third axis X1. Therefore, it is possible to reliably prevent the first push lever <NUM> from moving in the direction intersecting the third axis X1 in the second plane <NUM>.

The specific example <NUM> of the positioning mechanism is shown in <FIG>, <FIG>, and <FIG>. The blade guide <NUM> has guide portions <NUM>, <NUM>, <NUM>, and <NUM>. The guide portions <NUM> and <NUM> are provided in the same range in the direction along the center line A1. The guide portions <NUM> and <NUM> are provided in the same range in the direction along the center line A1. The arrangement range of the guide portions <NUM> and <NUM> and the arrangement range of the guide portions <NUM> and <NUM> are different.

The first push lever <NUM> is arranged between the magazine <NUM> and the cover <NUM> in the direction along the center line A2. By contacting with the blade guide <NUM> and the cover <NUM>, respectively, the first push lever <NUM> and the second push lever <NUM> are positioned in the direction along the first axis Z1. The first axis Z1 corresponds to the left-right direction in <FIG>. By contacting the guide portions <NUM> and <NUM> with the main body 74A of the first push lever <NUM>, the first push lever <NUM> is positioned in the direction along the second axis Y1. The second axis Y1 corresponds to the left-right direction in <FIG>. By contacting the guide portions <NUM> and <NUM> with the second push lever <NUM>, the second push lever <NUM> is positioned in the direction along the second axis Y1.

The cover <NUM> has an opening <NUM>, a stopper <NUM>, and mounting holes <NUM>. Screw members are inserted and tightened into the mounting holes <NUM> and <NUM>, so that the cover <NUM> and the blade guide <NUM> are fixed to the main body <NUM> in <FIG>.

A part of the second push lever <NUM> and a part of the arm <NUM> are arranged in the opening <NUM>. A protrusion <NUM> is provided on the cover <NUM>, and the protrusion <NUM> has a shaft hole <NUM>. A pin <NUM> is arranged in shaft holes <NUM> and <NUM>. A spring <NUM> is arranged between the protrusion <NUM> and the second push lever <NUM>. The spring <NUM> biases the second push lever <NUM> in the third direction D4, and the second push lever <NUM> comes into contact with the adjuster <NUM> and stops. The force of the spring <NUM> is transmitted to the arm <NUM> via the second push lever <NUM> and the adjuster <NUM>, and the first push lever <NUM> is always biased in the third direction D4.

The functions and operations of the first push lever <NUM>, the second push lever <NUM>, and the adjuster <NUM> in the specific example <NUM> are as follows. The second push lever <NUM> is biased in the third direction D4 by the force of the spring <NUM> and is in contact with the adjuster <NUM> in any of the cases in which the head portion 74B is separated from the workpiece W1 and in which the head portion 74B is pressed to the workpiece W1.

First, the case where the head portion 74B of the first push lever <NUM> is separated from the workpiece W1 will be described. The force of the spring <NUM> is transmitted to the shaft portion <NUM> via the second push lever <NUM> and the adjuster <NUM>, and the shaft portion <NUM> is in contact with the stopper <NUM> as shown in <FIG>. Namely, the first push lever <NUM> is stopped at the initial position. Further, the end portion 74C is separated from the blade guide <NUM>. When the first push lever <NUM> is stopped at the initial position, the second push lever <NUM> is stopped at the position separated from the contact piece 73A, that is, at the initial position as shown in <FIG>. Therefore, the push lever switch <NUM> is off.

Then, when the head portion 74B is pressed to the workpiece W1, the first push lever <NUM> moves in the fourth direction D5 with respect to the ejection unit <NUM> against the force of the spring <NUM>. Therefore, the shaft portion <NUM> is separated from the stopper <NUM>.

Further, when the first push lever <NUM> moves from the actuated position in the third direction D4, the second push lever <NUM> maintains the state of being in contact with the adjuster <NUM>, and moves from the actuated position in the third direction D4 by the force of the spring <NUM>. When the second push lever <NUM> is separated from the contact piece 73A, the push lever switch <NUM> is switched from on to off. When the shaft portion <NUM> comes into contact with the stopper <NUM>, the first push lever <NUM> stops at the initial position. Also, the second push lever <NUM> stops at the initial position. When the user rotates the adjuster <NUM> in the state where the head portion 74B is separated from the workpiece W1, the length L1 at which the head portion 74B protrudes from the tip 105A can be adjusted.

As shown in <FIG>, the blade guide <NUM> has a cutout portion <NUM>, and a portion 135B of the second push lever <NUM> that comes into contact with and separates from the contact piece 73A moves in the cutout portion <NUM>, and thus the movement of the second push lever <NUM> is not hindered.

The blade guide <NUM> and the cover <NUM> restrict the first push lever <NUM> and the second push lever <NUM> from moving in the direction intersecting the third axis X1 in the first plane <NUM>. Therefore, it is not necessary to separately provide the member that positions the first push lever <NUM> in the direction intersecting the third axis X1 in the first plane <NUM> and the member that positions the second push lever <NUM> in the direction intersecting the third axis X1 in the first plane <NUM>. Accordingly, it is possible to reduce the number of components, the size, and the weight of the driving tool <NUM>.

The blade guide <NUM> and the cover <NUM> prevent the first push lever <NUM> and the second push lever <NUM> from moving in the direction intersecting the third axis X1 in the first plane <NUM>. Further, the guide portions <NUM> and <NUM> that position the first push lever <NUM> and the guide portions <NUM> and <NUM> that position the second push lever <NUM> are provided on physically the same component, that is, the blade guide <NUM> which is a single component. Therefore, it is not necessary to separately provide the members for preventing the first push lever <NUM> and the second push lever <NUM> from moving in the direction intersecting the third axis X1 in the second plane <NUM>. Accordingly, it is possible to reduce the number of components, the size, and the weight of the driving tool <NUM>.

Also, as for the configuration in the specific example <NUM> of the positioning mechanism which is the same as that in the specific example <NUM> of the positioning mechanism, the same effect as that of the specific example <NUM> of the positioning mechanism can be obtained.

The specific example <NUM> of the positioning mechanism is shown in <FIG>, <FIG>, and <FIG>. The specific example <NUM> has substantially the same configuration as the specific example <NUM>. The guide portions <NUM> and <NUM> are in contact with the second push lever <NUM>. The guide portions <NUM> and <NUM> are separated from the first push lever <NUM>. The guide portions <NUM> and <NUM> are in contact with the first push lever <NUM>. The blade guide <NUM> and the cover <NUM> position the first push lever <NUM> and the second push lever <NUM> in the direction along the center line A2 in <FIG>. The spring <NUM> is arranged between the guide portion <NUM> and the first push lever <NUM>, and the spring <NUM> biases the first push lever <NUM> in the third direction D4.

By contacting with the blade guide <NUM> and the cover <NUM>, respectively, the first push lever <NUM> is restricted from moving in the direction intersecting the third axis X1 in the first plane <NUM>. By contacting with the guide portions <NUM> and <NUM>, respectively, the first push lever <NUM> is restricted from moving in the direction intersecting the third axis X1 in the second plane <NUM>.

Also, by contacting with the blade guide <NUM> and the cover <NUM>, the second push lever <NUM> is restricted from moving in the direction intersecting the third axis X1 in the first plane <NUM>. By contacting with the guide portions <NUM> and <NUM>, the second push lever <NUM> is restricted from moving in the direction intersecting the third axis X1 in the second plane <NUM>.

Note that the moving directions of the first push lever <NUM> and the second push lever <NUM> are restricted, respectively. On the other hand, there is a gap between the components due to the dimensional error of the components, the processing tolerance of the components, and the like. Therefore, the movement of the first push lever <NUM> and the second push lever <NUM> in the original moving direction are not hindered, and they can move smoothly.

Namely, the blade guide <NUM> and the cover <NUM> both function as the positioning members of the first push lever <NUM> and the second push lever <NUM>. In other words, there are shared components that position the first push lever <NUM> and the second push lever <NUM>. Therefore, it is not necessary to separately provide the positioning member of the first push lever <NUM> and the positioning member of the second push lever <NUM>. Accordingly, it is possible to suppress the increase in the number of components of the driving tool <NUM> and reduce the size, the weight, and the cost of the driving tool <NUM>. The other effects in the specific example <NUM> are the same as those in the specific example <NUM>.

Examples of the technical meaning of the matters disclosed in the embodiment are as follows. The driving tool <NUM> is an example of a driving tool. The fastener <NUM> is an example of a fastener, and the magazine <NUM> is an example of a magazine. The ejection unit <NUM> is an example of an ejection unit. The striking unit <NUM> is an example of a striking unit. The first push lever <NUM> is an example of a first push lever. The second push lever <NUM> is an example of a second push lever. The blade guide <NUM> and the cover <NUM> are an example of a guide member.

The guide member has a function to set the moving directions of the first push lever and the second push lever to a predetermined direction. Therefore, the guide member may be singular or plural. For example, the guide hole can be formed in each of the first push lever and the second push lever described in the embodiment. Then, by providing the blade guide <NUM> with the pins to be arranged in the guide holes, the single blade guide <NUM> has a function to set the moving directions of the first push lever and the second push lever to a predetermined direction. The blade guide <NUM> is an example of a blade guide. The cover <NUM> is an example of a cover. The adjuster <NUM> is an example of an adjustment mechanism.

The direction along the center line A1, that is, the direction along the third axis X1 is an example of a moving direction of a striking unit and a predetermined direction. The first direction D1 is an example of a first direction. The second direction D2 is an example of a second direction. The length L1 is an example of the amount of protrusion of the first push lever with respect to the ejection unit in the first direction. The direction along the center line A2 is an example of a direction in which the fastener is supplied to the ejection unit. The spring <NUM> is an example of a spring. The electric motor <NUM> is an example of a motor. The push lever switch <NUM> and the control unit <NUM> are an example of a detection unit. The control unit <NUM> is an example of a control unit. The magazine plate <NUM> is an example of a magazine plate. The ejection path <NUM> is an example of an ejection path. The guide portions <NUM>, <NUM>, <NUM>, and <NUM> are an example of a first guide portion. The guide portion <NUM> is an example of a second guide portion. The second push lever capable of moving in conjunction with the first push lever includes the meaning of the second push lever capable of moving by the transmission of the moving force of the first push lever.

The driving tool is not limited to the embodiment disclosed with reference to the drawings, and various changes can be made within the range not departing from the gist thereof. For example, the shapes of the first push lever and the second push lever may be any of a shaft shape, a block shape, an arm shape, and the like, respectively. Also, the first push lever and the second push lever are only required to be movable with respect to the ejection unit in the same predetermined direction as the moving direction of the striking unit. It does not matter if the first push lever and the second push lever may have a fulcrum or not when they move.

Further, as the spring for moving the striking unit in the first direction, a gas spring can be used instead of the metal spring. As the motor, any of a hydraulic motor, a pneumatic motor, and an engine can be used instead of the electric motor. The power supply unit that applies a voltage to the electric motor may be any of a DC power supply and an AC power supply.

The mechanism for biasing the striking unit in the first direction may be a pressure accumulation chamber and a pressure chamber provided in the housing instead of the spring. A compressible gas is supplied to the pressure accumulation chamber from the outside of the housing via an air hose. A valve for connecting and disconnecting the pressure accumulation chamber and the pressure chamber is provided. The pressure chamber is a space in which the compressible gas is supplied from the pressure accumulation chamber. The striking unit moves in the first direction by the pressure of the pressure chamber. When the second push lever is actuated by the moving force of the first push lever, the valve connects or disconnects the pressure accumulation chamber and the pressure chamber. Further, the standby position of the striking unit may be a position where the plunger is separated from the plunger bumper.

The detection unit may include a non-contact sensor instead of a contact sensor or a contact switch that generates a signal by contacting with or separating from the second push lever. The non-contact sensor generates a signal without contacting with the second push lever. Examples of the non-contact sensor include an optical sensor and a magnetic sensor. The control unit may be a single electric or electronic component or may be a unit including a plurality of electric components or a plurality of electronic components. Examples of the electric component or the electronic component include a processor, a control circuit, and a module.

Further, in the coordinate system of <FIG>, the angle formed between the first plane <NUM> and the second plane <NUM> does not have to be <NUM> degrees. It is sufficient if the first plane <NUM> and the second plane <NUM> intersect. Also, the angle formed between the first axis Z1 and the third axis X1 in the first plane <NUM> does not have to be <NUM> degrees. It is sufficient if the first axis Z1 and the third axis X1 intersect in the first plane <NUM>. Further, the angle formed between the second axis Y1 and the third axis X1 in the second plane <NUM> does not have to be <NUM> degrees. It is sufficient if the second axis Y1 and the third axis X1 intersect in the second plane <NUM>.

Claim 1:
A driving tool (<NUM>) including an ejection unit (<NUM>) to which a fastener is supplied and a striking unit (<NUM>) capable of moving with respect to the ejection unit (<NUM>) so as to drive the fastener supplied to the ejection unit (<NUM>) into a workpiece (W1),
the driving tool (<NUM>) comprising:
a first push lever (<NUM>) provided in the ejection unit (<NUM>), capable of contacting with and separating from the workpiece (W1), and capable of moving in a moving direction (Al) of the striking unit (<NUM>) with respect to the ejection unit (<NUM>); and
a second push lever (<NUM>) provided in the ejection unit (<NUM>) and capable of moving in the moving direction (A1) of the striking unit (<NUM>) in conjunction with the first push lever (<NUM>),
wherein the ejection unit (<NUM>) includes a blade guide (<NUM>) configured to guide a movement of the striking unit (<NUM>) and a cover (<NUM>) fixed to the blade guide (<NUM>), and
wherein the first push lever (<NUM>) and the second push lever (<NUM>) are arranged between the blade guide (<NUM>) and the cover (<NUM>) in a first perpendicular direction (A2, Z1) that is perpendicular to the moving direction (A1) of the striking unit (<NUM>), so that the first push lever and the second push lever are restricted from moving in the first perpendicular direction (A2, Z1) and a second perpendicular direction (Y1) that is perpendicular to the moving direction (A1) of the striking unit (<NUM>) and the first perpendicular direction (A2, Z1), and the movement of the first push lever (<NUM>) and the second push lever (<NUM>) with respect to the ejection unit (<NUM>) is guided along the moving direction (A1) of the striking unit (<NUM>).