JP5357826B2 - Rotating tool - Google Patents

Description

  The present invention relates to a rotary tool used for tightening work such as bolts, nuts, or wood screws, drilling work such as metalwork, woodworking, mortar, and concrete, and cutting work such as metalworking and woodworking.

  Conventionally, rotary tools such as impact rotary tools and drill drivers used for tightening bolts, nuts, wood screws, etc., drilling work for metalwork, woodwork, mortar, concrete, etc., cutting work for metalwork, woodwork, etc. A battery pack mounting part is provided at one end of the grip part for gripping with a cylinder, and a cylinder part is provided at the other end of the grip part so that the battery pack can be attached to and detached from the battery pack mounting part at one end of the grip part. Installed and configured.

  In the rotary tool having the above configuration, conventionally, since the motor to be controlled is arranged in the cylinder portion, the control circuit board is generally arranged in the cylinder portion (for example, Patent Document 1, Patent Document). 2).

  By the way, the rotary tool is used in a state where the battery is attached to the battery pack mounting portion. However, when the rotary tool drops during use, the outer shape (diameter) is larger than the grip portion when the floor surface is flat. The cylinder part and the battery pack are in direct contact with the floor. Therefore, the control circuit board installed in the cylinder part is easily damaged by the impact at the time of dropping directly on the cylinder part equipped with the control circuit board. When the part directly collides with the floor surface and a large load is applied due to a drop impact or the like, the housing is greatly deformed, and the control circuit board built in the cylinder part also tries to deform following the deformation. By the way, small parts such as chip parts are soldered on the control circuit board, and if the control circuit board in the cylinder is deformed following the large deformation of the housing in the cylinder part, the soldered part is easily detached and fulfills its function. There was a risk that it would disappear.

JP-A-9-155755 JP-A-7-290368

  The present invention was invented in view of the above-mentioned conventional problems, and even when dropped with the battery pack attached, the control circuit board can be placed away from the place where it directly hits the floor, and a drop impact, etc. It is an object of the present invention to provide a rotary tool that can prevent a control circuit board from being deformed following the deformation of the housing even if the housing is deformed by a large load.

In order to solve the above problems, a rotary tool according to the present invention is a rotary tool in which a grip part for gripping by hand is provided on a housing of a rotary tool body and a battery pack is detachably attached to one end of the grip part. A control circuit board arrangement part for arranging a control circuit board on the side where the battery pack at one end of the grip part is detachably attached is provided, and the housing is divided into left and right housing halves. An elastic body is mounted along the edges of the sides on both sides of the control circuit board when viewed from a direction orthogonal to the surface of the control circuit board. in a direction disposed on the control circuit board placement portion, the respective portions along the edge portions on both sides of the sides of the control circuit board in the elastic body, the inner side of the left and right directions of corresponding two split housing halves The control circuit board is held in the housing via the elastic body by being fitted in the fitting groove provided in the housing, and when the housing collides, the control circuit board is fitted in the fitting groove of each of the half housings. Further, the elastic body is configured to deform following the deformation of the housing.

  In this way, the presence of the control circuit board placement part for placing the control circuit board on the side where the battery pack is attached at one end of the grip part allows the control circuit to be used even if the rotary tool falls in the usage state with the battery pack attached. The part where the board placement part is provided does not directly collide with the floor surface, and the control circuit board placed in the control circuit board placement part can be prevented from being damaged, and the control circuit board is placed in the control circuit board placement part. Since the rotary tool is held in the housing via an elastic body, the housing is deformed by a large load due to a drop impact or the like. The elastic body relaxes the deformation of the housing and follows the deformation of the housing. The control circuit board can be prevented from being deformed to further prevent damage to the control circuit board. In addition, when the rotary tool body falls in a non-use state with the battery pack removed, there may be a case where the portion provided with the control circuit board arrangement portion at one end of the grip portion directly collides with the floor surface. Even in such a case, since the control circuit board is held in the housing through the elastic body, the elastic body can prevent the control circuit board from being damaged by the impact of the collision.

Further, the switch portion provided on the control circuit board is provided with an operation input unit for operating the switch unit by operating from the outside of said housing at a position opposite to the control circuit board placement portion, the control circuit board It is preferable that a part of the control circuit board is held in the housing via the elastic body, and another part of the control circuit board is directly held in the housing.
The elastic body has a U-shaped sandwiching portion having a U-shaped cross section, and an edge of the side of the control circuit board is fitted inside the U-shaped sandwiching portion, and the U-shaped sandwiching portion is inserted into each of the respective U-shaped sandwiching portions. A part of the control circuit board is held in the housing via the elastic body by being fitted into a fitting groove that opens inwardly of the half housing. A holding projection is provided on a side surface, a concave portion penetrating in a direction orthogonal to the surface of the control circuit board is provided on a side end surface of the control circuit board, and the holding projection is fitted into the concave portion, thereby the other of the control circuit board. It is preferable to hold a part of the housing directly on the housing.
In addition, a cylinder portion is provided at an end portion of the grip portion opposite to a side where the battery pack is attached, a motor controlled by the control circuit board is provided in the cylinder portion, and a battery provided at one end portion of the grip portion. The pack mounting portion is provided with a front protruding portion that protrudes forward from the grip portion, the control circuit board placement portion is provided at the front protruding portion, and the portion that is directly held by the housing of the control circuit board is attached to the elastic body. It is preferable to arrange it behind the part held via.

  In the present invention, even if the rotary tool falls with the battery pack attached, the portion provided with the control circuit board arrangement portion does not directly collide with the floor surface, and the control circuit board arranged in the control circuit board arrangement portion is damaged. Not only can this be prevented, but even if the rotating tool is subjected to a large load due to a drop impact or the like and the housing is deformed, the elastic body relaxes the deformation of the housing and the control circuit board is deformed following the deformation of the housing. The control circuit board can be further prevented from being damaged, and the battery pack is removed from the battery pack mounting part in a non-use state, and a control circuit board arrangement part is provided at one end of the grip part. Even if the part collides directly with the floor, the control circuit board is held by the housing through the elastic body, so the control circuit board is prevented from being damaged by the impact of the collision. It is kill things.

It is a side view of the half state of the rotary tool of the present invention. It is a principal part expanded side view same as the above. It is sectional drawing of the XX line of FIG. It is a whole perspective view same as the above. (A) is a schematic diagram before the housing of the part which supported the control circuit board in the housing in the case of not using an elastic body deform | transforming, (b) is a schematic diagram at the time of a deformation | transformation. (A) is a schematic diagram before the housing of the part which supported the control circuit board in the housing at the time of using an elastic body deform | transforms, (b) is a schematic diagram at the time of a deformation | transformation. (A) is a top view of the state which mounted | worn with the elastic body which carried out U-shaped cross-section sandwiching the control circuit board, and (b) is a sectional view. (A) is explanatory drawing which shows the example which attached the elastic body to the position which does not interfere with the arrangement range of a circuit component on a control circuit board, (b) is elastic to the position which interferes with the arrangement range of a circuit component on a control circuit board It is explanatory drawing which shows the example which attached the body.

  Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.

The rotary tool A is an impact rotary tool, an electric drill driver, etc.
A battery pack is mounted on the rotary tool body 1 provided in the housing 2 with a drive unit 15 that decelerates the rotation of the motor 14, an output shaft 15 a that outputs the rotation output of the drive unit 15, and a trigger switch 16 that instructs the rotation of the motor 14. 4 is detachably attached. In the embodiment shown in the accompanying drawings, an example of an impact rotary tool is shown as the rotary tool A, but other rotary tools may of course be used.

  The housing 2 of the rotary tool body 1 is provided with a battery pack mounting portion 5 for detachably mounting the battery pack 4 at one end (lower end) of the grip portion 3 for gripping by hand. A cylinder portion 17 is provided at the other end (upper end), which is the end opposite to the attachment portion 5, so as to intersect the grip portion 3, and the battery pack attachment portion 5 at one end portion of the housing 2. The battery pack 4 can be attached to the battery pack mounting portion 5 by fitting the end portion (upper end portion) of the battery pack 4 into the opening 22 provided on the end surface portion on the opposite side of the cylinder portion 17. The attachment / detachment operation portion 18 provided in the battery pack 4 can be operated and detached. Here, in the rotary tool A, the grip portion 3 is a portion that is thinner and smaller in cross section than the other portions, and the cylinder portion 17 and the battery pack mounting portion 5 provided at both ends of the grip portion 3 are both grip portions. The outer shape is larger than 3, and the battery pack 4 has a larger outer shape than the grip portion 3.

  The cylinder portion 17 has a cylindrical shape or a non-circular cylindrical shape. As shown in FIG. 1, the motor 14, the drive portion 15, and the output shaft 15 a are internally provided in the cylinder portion 17 of the housing 2, and the grip portion 3. The trigger switch 16 and a part of the trigger part 19 provided on the trigger switch 16 are internally provided (the other part of the trigger part 19 protrudes to the outside at the corner part formed by the front face of the grip part 3 and the cylinder part 17). ing). Furthermore, in the embodiment shown in the accompanying drawings, a bulging portion 31 is provided on the surface of the cylinder portion 17 protruding forward from the front surface of the grip portion 3, and a light is provided on the front portion of the bulging portion 31. 30 is provided, the trigger portion 19 is arranged at a corner portion formed by the bulging portion 31 and the grip portion 3, and the light 30 is provided at a position protruding forward from the trigger portion 19 for output The front position of the shaft 15a (that is, the attachment for the driver or the drill attached to the output shaft 15a) is illuminated in front of the shaft 15a so that the work can be reliably performed even in the dark.

  A front projecting portion 20 in which the front portion of the battery pack mounting portion 5 of the housing 2 (that is, the same side as the surface from which the trigger portion 19 of the grip portion 3 projects) is projected forward from the front surface of the grip portion 3; The inside of the front projecting portion 20 at the front of the battery pack mounting portion 5 is partitioned by a partition 21, and a space between the partition 21 and the surface of the front projecting portion 20 facing the cylinder portion 17 is formed. The control circuit board placement unit 6 is provided. The end surface portion of the battery pack mounting portion 5 opposite to the cylinder portion 17 is the opening 22 for fitting the end portion of the battery pack 4 as described above, but projects into the front portion of the battery pack mounting portion 5. The part on the opposite side of the control circuit board placement part 6 also constitutes a part of the opening part 22 through the partition 21 in the provided front projecting part 20. Therefore, the control circuit board disposition portion 6 is located at a position (upward position) shifted from the portion for fitting the end portion of the battery pack 4 in the battery pack mounting portion 5 provided at one end portion of the grip portion 3 toward the cylinder portion 17 side. ).

  When the surface of the front protrusion 20 projecting forward from the front of the battery pack mounting portion 5 of the housing 2 is opposed to the cylinder portion 17 (that is, when the cylinder portion 17 side is up and the battery pack mounting portion 5 is down, An operation panel 35 including an operation input unit 11 and a display light emitting unit 34 such as an LED is provided at a position (upper position) opposite to the control circuit board arrangement unit 6 on the upper surface of the front protrusion 20.

A holding portion 25 is formed integrally with the housing 2 in the control circuit board arrangement portion 6 of the housing 2. In the embodiment shown in the accompanying drawings, a housing 2 is divided into two housing halves 2a. The half housing 2a has a front projection 20 as a front surface. When the plane orthogonal to the left and right sides is divided into two in the left-right direction. In the front projecting portion 20 of the housing 2 composed of the two split housing halves 2a, control is performed from the left and right inner surfaces of the split housing half 2a and the front inner surface as shown in FIGS. A holding portion 25 having a fitting groove portion 24 protrudes into a space constituting the circuit board arrangement portion 6.

  In addition, holding projections 32 are provided separately from the holding portion 25 on the inner surfaces of both left and right sides inside the half housing 2a.

  A wiring passage forming partition 26 is continuously provided from an end portion of the partition 21 provided in the front projecting portion 20 (an end portion of the front projecting portion 20 on the projecting base side) into the grip portion 3 of the housing 2. A space between the forming partition 26 and the front surface portion of the grip portion 3 of the housing 2 is a wiring passage 27.

  A portion of the housing 2 near the cylinder portion 17 in the grip portion 3 serves as a switch housing portion 28, and the switch housing portion 28 communicates with the inside of the cylinder portion 17 and the wiring passage 27. In addition, a connector 29 for electrically connecting to the connector of the battery pack 4 is provided in the grip portion 3, and power from the battery pack 4 is supplied to the motor 14 and the like via the connector 29.

  A control circuit board 7 for controlling the motor 14 and controlling the light 30 to be turned on and off, and controlling the light 30 such as turning on, turning off, and blinking the display light emitting unit in response to the control operation. As shown in FIG. 7A, the elastic body 8 is attached to the edge over three of the four sides. The elastic body 8 has a U-shape along the edges of the three sides of the flat control circuit board 7 when viewed from a direction orthogonal to the plane of the flat control circuit board 7. The cross-sectional shape of each part of the circuit board 7 is U-shaped as shown in FIG. 7B, and the U-shaped sandwiched portion 9 is the U-shaped section.

  Therefore, by inserting the U-shaped sandwiching portion 9 of the elastic body 8 into the control circuit board 7 and elastically sandwiching the control circuit board 7 by the U-shaped sandwiching section 9, the elastic body is attached to the three sides of the control circuit board 7. 8 is attached so that the elastic body 8 does not fall off. In this state, the control circuit board 7 can be easily assembled via the elastic body 8 by incorporating the control circuit board 7 into the control circuit board arrangement portion 6 of the housing 2. It can be held in the housing 2.

  In this case, the control circuit board is inserted into the housing 2 via the elastic body 8 by fitting the elastic body 8 portion sandwiched between the three sides of the control circuit board 7 into the fitting groove 24 of the holding rib 25 provided in the housing 2. 7 is held.

  In the embodiment shown in the accompanying drawings, as described above, the holding projections 32 facing each other are provided on the left and right inner surfaces of the half housing 2a, and the control circuit board 7 has the left and right sides. Recesses 33 are provided on both sides, and holding projections 32 provided on the inner surfaces of the left and right sides inside the housing half 2a are fitted into the recesses 33 on both the left and right sides of the control circuit board 7. A part of the control circuit board 7 is directly held in the housing 2 without the elastic body 8 interposed therebetween.

  That is, in the present embodiment, a part of the control circuit board 7 is held in the housing 2 via the elastic body 8 and the other part of the control circuit board 7 is directly held in the housing 2. .

Of course, in the present invention, the control circuit board 7 may be held by the housing 2 only via the elastic body 8 without providing the holding projection 32 and the recess 33 as described above.

  The operation input unit 11 is located at a position (upper position) of the upper surface portion (surface on the cylinder portion 17 side) of the front projecting portion 20 projecting forward from the control circuit board placement portion 6 and facing the control circuit board placement portion 6. An operation panel 35 including display light emitting units 34a, 34b, and 34c such as LEDs is provided.

  Various electronic components are mounted on the control circuit board 7. A plurality of switch units 10 are mounted as electronic components. With the control circuit board 7 held in the housing 2 as described above, each switch unit 10 mounted on the control circuit board 7 is attached to the operation panel 35. The plurality of operation input sections 11 provided are opposed to each other in the vertical direction.

  The switch unit 10 mounted on the control circuit board 7 includes, for example, a light switch unit, a striking force switching switch unit, a storage switch unit, a learning switch unit, and the like. The light switch is used as the operation input unit 11 provided on the operation panel 35. Light switch part operation input part 11a for operating, striking force changeover switch part operation input part 11b for operating the striking force changeover switch part, storage switch part operation input part 11c for operating the storage switch part A learning switch unit operation input unit 11d for operating the learning switch unit is provided.

  Here, the light switch unit is operated by operating the light switch unit operation input unit 11a to turn the light 30 on and off. Further, the striking force changeover switch unit is operated by operating the striking force changeover switch operation input unit 11b to switch the rotation speed of the motor 14 (in the embodiment, the number of rotations is changed to three levels, but not necessarily limited to three levels). Thus, the torque can be adjusted, and the adjustment state of the torque is displayed on the display light emitting part 34a. For example, when the torque is strong, the display light emitting unit 34a is turned off, when the torque is medium, the display light emitting unit 34a blinks, and when the torque is weak, the display light emitting unit 34a is turned off. ing.

  Further, when the trigger switch 19 is operated to turn off the trigger switch 16 and then the storage switch section operation input section 11c is pressed, the speed control curve of the motor 14 when the previous trigger section 19 is operated is stored. It is like that. Then, the motor 14 is driven by the speed control curve stored when the trigger portion 19 is pulled next time. When the storage switch operation input unit 11c is pressed again, the storage mode is canceled. When the storage switch operation input unit 11c is pressed once (that is, turned on) to enter the storage mode, the display light-emitting unit 34b is lit, and is pressed again (that is, turned off) to change the storage mode. When it is released, the display light emitting part 34b is turned off.

  Further, when the learning switch unit operation input unit 11d is operated to turn on the learning switch unit, a learning mode is set, and an averaged speed control curve is obtained by a plurality of preset operations of the trigger unit 19 after entering the learning mode. Is generated, and when the operation of the trigger unit 19 for a plurality of times of learning is finished, a new one set in accordance with the user's habit is obtained by learning as described above when the trigger unit 19 is subtracted from the next operation. The motor 14 is driven with a simple speed control curve. Further, when the learning switch unit operation input unit 11d is pushed again and operated to turn off the learning switch unit, the learning mode is canceled. Here, when the learning switch unit operation input unit 11d is pressed once (that is, turned on) to enter the learning mode, the display light emitting unit 34c is turned on, and is pressed once again (that is, turned off). When is canceled, the display light emitting unit 34c is turned off.

  The rotary tool A is used in a state where the battery pack 4 is attached to the rotary tool body 1 and assembled as the rotary tool A, but the rotary tool A may be accidentally dropped during use. . Thus, in the state where the battery pack 4 is attached to the battery pack attachment portion 5 of the rotary tool body 1, the portion provided with the control circuit board arrangement portion 6 provided on the side where the battery pack 4 is attached at one end of the grip portion 3 is provided. Damage to the control circuit board 7 arranged in the control circuit board arrangement part 6 without directly colliding with the floor surface (that is, the cylinder part having a large outer shape or the battery pack 4 directly colliding with the floor surface at both ends of the rotary tool A) Can be prevented. Further, the housing 2 is deformed by an impact load when the rotary tool A is dropped. At this time, the housing in which the control circuit board 7 is directly held by the housing 2 as shown in the schematic diagram of FIG. When 2 is deformed as shown in the schematic diagram of FIG. 5B, the control circuit board 7 is also deformed following the deformation of the housing 2. However, in the present invention, as described above, the control circuit board 7 is held in the housing 2 via the elastic body 8 (schematically shown in FIG. 6A). Even if the housing 2 is deformed as shown in the schematic diagram, the deformation of the control circuit board 7 can be suppressed by the deformation of the elastic body 8.

  Further, when the rotary tool main body 1 is dropped in a non-use state in which the battery pack 4 is removed from the battery pack mounting portion 5, the portion provided with the control circuit board arrangement portion 6 at one end of the grip portion 3 is directly on the floor surface. There is a possibility that a collision may occur (there is a low possibility because it is in a non-use state, and even if it falls, the impact is small since it falls from a low place). Since the control circuit board 7 is held in the housing 2 via the elastic member 8, damage to the control circuit board 7 due to the impact of the collision can be prevented.

  In the embodiment shown in the accompanying drawings, a part of the control circuit board 7 is held in the housing 2 via the elastic body 8 and the other part of the control circuit board 7 is directly held in the housing 2. Therefore, as described above, the deformation of the control circuit board 7 can be mitigated by the elastic body 8 against the deformation of the housing 2 at the time of the drop impact of the rotary tool A and the damage of the control circuit board 7 can be prevented. Since the other part of the control circuit board 7 is directly held by the housing 2, the positional relationship between the operation input unit 11 and the control circuit board 7 is not shifted, and malfunctions can be prevented. Is.

  By the way, some elastic bodies 8 include a conductive material (for example, rubber includes carbon). When the elastic body 8 including such a conductive material is used, the arrangement range of the circuit components of the control circuit board 7 is used. It is necessary to dispose E (the hatched portion in FIG. 8) and the elastic body 8 apart from each other so as not to interfere with each other as shown in FIG. 8A, and the control circuit board 7 becomes large. Therefore, if the elastic body 8 has electrical insulation, there is no problem even if the elastic range 8 overlaps with the arrangement range E of the circuit parts of the control circuit board 7 as shown in FIG. The control circuit board 7 can be made smaller.

A Rotating tool 1 Rotating tool body 2 Housing 3 Grip part 4 Battery pack 5 Battery pack mounting part 6 Control circuit board placement part 7 Control circuit board 8 Elastic body 9 U-shaped sandwiching part 10 Switch part 11 Operation input part

Claims (4)

In the rotary tool in which a grip part for gripping by hand is provided on the housing of the rotary tool body and the battery pack is detachably attached to one end of the grip part, the battery pack at the one end of the grip part is detachably attached A control circuit board placement portion for placing the control circuit board is provided, and the housing is divided by splitting the left and right housing halves and is orthogonal to the surface of the control circuit board. When viewed from the direction, an elastic body is mounted along the edges of both sides of the control circuit board, and the control circuit board is placed in the control circuit board placement portion with its surface facing up and down, and the elasticity the respective portions along the edge portions on both sides of the sides of the control circuit board in the body, by fitting a fitting groove provided on the inner surface of the lateral direction of the corresponding two split housing halves, the control The road substrate is held in the housing via the elastic body, and when the housing collides, the elastic body fitted in the fitting groove portion of each half housing half follows the deformation of the housing. A rotating tool characterized by being deformed.   A switch part is provided on the control circuit board, an operation input part for operating the switch part by an operation from the outside of the housing is provided at a position facing the control circuit board placement part, and one of the control circuit boards is provided. The rotary tool according to claim 1, wherein a part is held on the housing via the elastic body, and another part of the control circuit board is directly held on the housing. The elastic body has a U-shaped sandwiching portion having a U-shaped cross section, and an edge of the side of the control circuit board is fitted inside the U-shaped sandwiching portion, and each of the two U-shaped sandwiching portions is provided. A part of the control circuit board is held in the housing via the elastic body by being fitted into a fitting groove that opens inward of the split housing half.
A holding projection is provided on the inner side surface of each of the split housing halves, a concave portion penetrating in a direction perpendicular to the surface of the control circuit board is provided on a side end surface of the control circuit board, and the holding projection is fitted into the concave section. The rotary tool according to claim 2, wherein another part of the control circuit board is directly held by the housing.   A cylinder part is provided at the end of the grip part opposite to the side where the battery pack is attached, a motor controlled by the control circuit board is provided in the cylinder part, and the battery pack is provided at one end of the grip part A front projecting portion projecting forward from the grip portion is provided in the portion, the control circuit board placement portion is provided in the front projecting portion, and a portion directly held by the housing of the control circuit board is interposed via the elastic body. The rotary tool according to claim 2, wherein the rotary tool is disposed rearward of the portion to be held.

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