CN117984273A - Reciprocating tool - Google Patents

Abstract

The present invention relates to a reciprocating tool. The reciprocating tool has a motor, a reciprocating mechanism, a main body housing, a handle body including a grip portion, and an elastic body. One of the main body case and the handle body has a1 st connection portion, and the other has a2 nd connection portion. The main body case and the handle body are connected to each other by a1 st connecting portion and a2 nd connecting portion so as to be movable relative to each other in the front-rear direction. The 1 st connection part has an internal space and an opening that communicates the internal space with the outside of the 1 st connection part. The 2 nd connecting portion protrudes at least partially into the internal space through the opening of the 1 st connecting portion, and is movable in the front-rear direction with respect to the 1 st connecting portion within the range of the opening. The elastic body is disposed in the internal space of the 1 st connecting portion, and biases the 1 st connecting portion and the 2 nd connecting portion so as to separate the main body case and the handle body from each other in the front-rear direction. Accordingly, the main vibration in the front-rear direction generated by the reciprocating drive of the tip tool can be effectively absorbed.

Description

Reciprocating tool

Technical Field

The present invention relates to a reciprocating tool configured to linearly reciprocate a tip tool.

Background

The reciprocating tool reciprocates the tip tool linearly along the drive axis. When the tip tool is driven, relatively large vibrations are generated in the extending direction (front-rear direction) of the drive axis. Accordingly, a reciprocating tool having a vibration-proof handle structure for reducing vibrations transmitted to a grip portion is known. For example, in the hammer drill disclosed in japanese unexamined patent publication No. 2020-40161, an upper end portion of a handle and a rear end portion of a main body case are connected so as to be relatively movable in a front-rear direction. In addition, the elastic body is interposed between the upper end portion of the handle and the rear end portion of the main body case, and biases the upper end portion of the handle and the rear end portion of the main body case away from each other.

Disclosure of Invention

In the hammer drill described above, the connection structure of the handle and the main body case (the long hole of the handle and the protrusion provided in the main body case and inserted into the long hole) and the elastic body (the compression coil spring) are arranged in the front-rear direction. Therefore, a relatively wide area is required in the front-rear direction. In addition, for example, if the relative movement distance of the handle and the main body case is increased, the hammer drill becomes large in the front-rear direction.

In view of the above, it is a non-limiting 1 object of the present invention to provide an improvement in the structure of a vibration-proof handle related to a reciprocating tool.

According to a non-limiting 1 aspect of the present invention, there is provided a reciprocating tool having a motor, a reciprocating mechanism, a main body housing, a handle body, and an elastic body. The reciprocating mechanism is operatively connected to the motor and configured to reciprocate the tool along the drive axis in a linear manner. The drive axis defines the forward and rearward direction of the reciprocating tool. The main body housing accommodates the motor and the reciprocating mechanism. The handle body comprises a holding part. The grip portion extends in the up-down direction intersecting the drive axis at the rear of the main body case.

One of the main body case and the handle body has a 1 st connection portion. The other of the main body case and the handle body has a 2 nd connecting portion. The main body case and the handle body are connected to each other by a 1 st connecting portion and a 2 nd connecting portion so as to be movable relative to each other in the front-rear direction. The term "the body case and the handle body are relatively movable in the front-rear direction" as used herein means that the body case and the handle body are relatively movable at least partially, and the relative movement direction thereof includes a front-rear direction component, and is not strictly limited to being relatively movable only in the front-rear direction. The 1 st connection part has an internal space and an opening that communicates the internal space with the outside of the 1 st connection part. The 2 nd connecting portion protrudes at least partially into the inner space through the opening of the 1 st connecting portion. The 2 nd connection portion is movable in the front-rear direction with respect to the 1 st connection portion within the range of the opening. The elastic body is disposed in the internal space of the 1 st connecting portion, and biases the 1 st connecting portion and the 2 nd connecting portion so that the body case and the handle body are mutually separated in the front-rear direction.

According to this aspect, the elastic body separates the 1 st connecting portion and the 2 nd connecting portion from each other in the front-rear direction, and thereby the main vibration in the front-rear direction, which is generated in association with the reciprocating drive of the tip tool, can be effectively absorbed. The main body case and the handle body are connected to each other so as to be movable in the front-rear direction by a1 st connection portion and a2 nd connection portion protruding into the internal space through an opening of the 1 st connection portion, and the elastic body is disposed in the internal space of the 1 st connection portion. That is, the 1 st connecting portion functions not only to connect the main body case and the handle body in cooperation with the 2 nd connecting portion, but also to accommodate the elastic body. Therefore, the connecting structure between the handle body and the main body case and the elastic body are accommodated in a region smaller in the front-rear direction than the above-described known structure, so that the reciprocating tool can be miniaturized. Or the distance that the handle body and the main body housing can relatively move can be increased without enlarging the reciprocating tool in the front-rear direction.

Drawings

Fig. 1 is a perspective view of a hammer drill.

Fig. 2 is a cross-sectional view of the hammer drill.

Fig. 3 is a perspective view of the handle body.

Fig. 4 is an enlarged view of a portion of fig. 1 (but the flexible sheet of the operation portion is not shown).

Fig. 5 is a rear view of the hammer drill (but the flexible sheet of the operation portion is not shown).

Fig. 6 is a VI-VI cross-sectional view of fig. 2.

Fig. 7 is an enlarged view of a portion of fig. 2 and shows the handle body in an initial position.

Fig. 8 is a cross-sectional view of VIII-VIII of fig. 7.

Fig. 9 is a cross-sectional view corresponding to fig. 7 and showing the handle body in a forward-most position.

Fig. 10 is a partial enlarged view of fig. 2.

Fig. 11 is a sectional view of XI-XI of fig. 10.

Fig. 12 is an exploded perspective view of the switch unit.

Fig. 13 is a perspective view of the operation panel.

Description of the reference numerals

1: A hammer drill; 10: a main body housing; 11: a1 st housing part; 110: an opening; 111: a cylindrical portion; 113: an opening; 12: a handle accommodating part; 121: a beam portion; 122: a connection protrusion; 123: a receiving part; 125: a screw; 127: a rib; 15: a2 nd housing part; 15L: split bodies; 15R: split bodies; 151: an opening; 152: a shaft support portion; 153: a concave portion; 17: an inner housing; 175: an abutting portion; 2: a handle body; 2L: split bodies; 2R: split bodies; 21: a holding part; 211: a trigger; 213: a main switch; 23: an upper extension; 230: an elastomer; 235: an abutting portion; 24: an upper connecting part; 240: an inner space; 241: an opening; 242: a rear end; 243: a noodle; 244: a noodle; 245: a through hole; 247: a spring support portion; 25: a lower extension; 26: a controller housing part; 261: a battery mounting portion; 27: a rotary connection part; 270: an elastomer; 271: a connecting shaft; 28: a facing portion; 280: a facing surface; 283: an opening; 284: a rib; 30: a controller; 31: a motor; 310: a motor main body; 315: a motor shaft; 4: a driving mechanism; 40: a main shaft; 401: a tool holder; 41: an impact mechanism; 42: a motion conversion mechanism; 43: a swinging member; 44: impact structural elements; 46: a rotation transmission mechanism; 5: a switching unit; 50: a circuit substrate; 51: a screw; 6: an operation unit; 60: an operation panel; 600: an outer surface; 61: a base portion; 611: an inner surface; 612: an outer surface; 613: a protrusion; 615: a protruding portion; 616: an opening; 617: a protruding piece; 62: a hole; 65: a button; 651: a1 st button; 652: a2 nd button; 66: an arm section; 661: arm 1; 662: a2 nd arm portion; 67: a flexible sheet; 671: a logo; 672: a logo; 675: a window; 7: a switch; 70: a push button; 71: a1 st switch; 72: a2 nd switch; 8: a notification unit; 81: an LED;83: an LED;91: a tip tool; 93: a battery; DX: a drive axis; MX: a motor axis; PX: axis of rotation

Detailed Description

In a non-limiting embodiment of the present invention, the 1 st connecting portion may be provided to the handle body. The 2 nd connection portion may be a protrusion provided to the main body case. According to this embodiment, the 2 nd connecting portion as a protrusion is provided in the main body case accommodating the motor and the reciprocating mechanism, and the 1 st connecting portion having an inner space and an opening is provided in the handle body. Therefore, the assembling worker can easily align the opening of the 1 st connecting portion of the handle body with the 2 nd connecting portion (projection) of the main body case and insert the 2 nd connecting portion (projection) into the opening of the 1 st connecting portion. Accordingly, the assemblability is improved.

In addition to or instead of the above embodiment, the 1 st connecting portion may be provided at a portion extending forward from the upper end portion of the grip portion. The handle body generally includes a portion extending forward from an upper end portion of the grip portion in order to connect the grip portion and the main body case. Therefore, according to this embodiment, the portion originally possessed by the handle body can be effectively used, and accordingly, the 1 st connecting portion can be provided without complicating and enlarging the handle body.

In addition to or instead of the above embodiment, at least a part of the handle body may be formed of 2 handle split bodies connected to each other in a left-right direction orthogonal to the front-rear direction and the up-down direction. The inner space of the 1 st connecting part of the handle body can be formed by connecting 2 handle split bodies. According to this embodiment, the 1 st connection portion having the internal space can be easily formed.

In addition to or instead of the above embodiment, at least a part of the main body case may be formed of 2 main body split bodies connected to each other in a left-right direction orthogonal to the front-rear direction and the up-down direction. The 2 nd connection portion of the main body case may be provided at one of the 2 main body split bodies and connected to the other of the 2 main body split bodies. According to this embodiment, since a part of the 2-piece connection portions of the main body case can be effectively used as the 2 nd connection portion, the structure of the main body case can be simplified.

In addition to the above embodiments, or instead of the above embodiments, the elastic body may directly abut against the rear end of the 2 nd connection portion of the main body case in the front-rear direction. In other words, the 2 nd connection portion of the main body case may be configured as a spring receiving portion that receives the front end of the elastic body. According to this embodiment, since there is no need to provide a separate spring receiving portion in the main body case, the structure of the main body case can be simplified.

In addition to or instead of the above embodiment, the tip of the 2 nd connecting portion of the main body case may be configured to define the initial position of the handle relative to the main body case by abutting against a part of the 1 st connecting portion. That is, the rear end and the front end of the 2 nd link portion may be configured as positioning portions for initial positions of the spring receiving portion and the handle body, respectively. According to this embodiment, since there is no need to provide a separate positioning portion in the main body casing, the structure of the main body casing can be simplified.

In addition to or instead of the above embodiments, a rear end opening may be formed at a rear end portion of the main body case, the rear end opening being opened rearward and communicating an inner space of the main body case with the outside. The 1 st connecting portion may extend into the main body case through the rear end opening. The rear end of the opening of the 1 st connection part may be located forward of the rear end opening of the main body case. According to this embodiment, since the opening of the 1 st connection portion is disposed in the main body case, the possibility of dust entering the internal space from the opening of the 1 st connection portion and causing malfunction of the elastic body can be reduced.

In addition to or instead of the above embodiment, the main body case may have a 3 rd connection portion. The handle body may have a 4 th connection portion. The upper end portions of the main body case and the handle body may be connected to each other by a 1 st connection portion and a2 nd connection portion so as to be relatively movable in the front-rear direction. The lower end portions of the main body case and the handle body may be connected to each other by a 3 rd connecting portion and a 4 th connecting portion so as to be relatively movable about a rotation axis extending in a left-right direction orthogonal to the front-rear direction and the up-down direction. According to this embodiment, by rotating the handle relative to the main body casing, the maximum vibration in the front-rear direction generated by the reciprocation drive of the tip tool can be absorbed by the elastic body while coping with the vibration in the front-rear direction and the vibration in the up-down direction generated by the main body casing.

In addition to the above embodiment, or instead of the above embodiment, the 1 st connection portion may be arranged such that a straight line extending in the up-down direction orthogonal to the rotation axis passes through the 1 st connection portion. In other words, the 1 st connecting portion may be disposed directly above the rotation axis. According to this embodiment, the direction in which the elastic body exerts the urging force substantially coincides with the extending direction of the tangent line of the circle having the line segment connecting the portion of the 1 st connecting portion located directly above the rotation axis and the rotation axis as the radius and the rotation axis as the center. Therefore, the lifetime of the elastomer can be prolonged without applying an unreasonable stress to the elastomer.

The hammer drill 1 according to a representative and non-limiting embodiment of the present invention will be described below with reference to the accompanying drawings. The hammer drill 1 is an electric tool capable of performing an impact operation. The striking motion is a motion of striking the tip tool 91 detachably held so as to linearly reciprocate along the drive axis DX. That is, the hammer drill 1 is one example of an impact tool or one example of a reciprocating tool. The hammer drill 1 can perform a rotary motion in addition to the impact motion, or can perform a rotary motion independently of the impact motion. The rotation is an operation of driving the tip tool 91 to rotate about the driving axis DX.

First, a schematic structure of the hammer drill 1 will be described. As shown in fig. 1 and 2, the outer contour of the hammer drill 1 is formed of a main body casing 10 and a handle body 2 connected to the main body casing 10.

The body housing 10 is a hollow body also referred to as a tool body or housing. The main body case 10 of the present embodiment includes a1 st case portion 11 and a 2 nd case portion 15.

As shown in fig. 2, the 1 st housing 11 is a part that mainly houses the spindle 40 as a tip tool holding member and the drive mechanism 4 of the tip tool 91. The spindle 40 is an elongated tubular member. One end of the spindle 40 in the longitudinal direction is configured as a tool holder 401 for detachably holding the tip tool 91. The long axis of the tool holder 401 (spindle 40) defines the drive axis DX of the tip tool 91.

The 1 st housing part 11 extends along the drive axis DX. The 1 st housing portion 11 is formed in a cylindrical shape at one end in the extending direction of the drive axis DX, and the tool holder 401 is housed in this portion (also referred to as a cylindrical portion (barrel department) 111). The remaining part of the 1 st housing part 11 is a cylinder shape larger than the cylinder part 111.

The 2 nd housing portion 15 is a portion that mainly houses the motor 31. The 2 nd housing portion 15 is connected to an end portion of the 1 st housing portion 11 located on the opposite side to the cylindrical portion 111 in the extending direction of the drive axis DX, and extends in a direction intersecting (in detail, substantially orthogonal to) the drive axis DX. According to this structure, the main body case 10 including the 1 st case portion 11 and the 2 nd case portion 15 is integrally formed in an L shape.

The handle body 2 is a hollow member having a U-shape as a whole, and both ends thereof are connected to the main body case 10 (the 2 nd case portion 15). The handle body 2 includes a grip portion 21 to be gripped by a user. The grip portion 21 extends in a direction intersecting the drive axis DX (in detail, a direction substantially orthogonal thereto). The grip 21 is provided with a trigger 211 that is pushed by a user. The main switch 213 is accommodated in the grip portion 21. When the main switch 213 is turned on in response to the pressing operation of the trigger 211, the driving of the motor 31 is started, and the tip tool 91 is driven by the driving mechanism 4.

Next, the detailed structure of the hammer drill 1 will be described. In the following description, for convenience of explanation, the extending direction of the drive axis DX is defined as the front-rear direction of the hammer drill 1. In the front-rear direction, the tip side of the tool holder 401 (the side where the tip tool 91 is inserted) is defined as the front side of the hammer drill 1, and the side opposite to the front side is defined as the rear side. The direction perpendicular to the drive axis DX and substantially corresponding to the extending direction of the 2 nd housing portion 15 (also the extending direction of the grip portion 21) is defined as the vertical direction of the hammer drill 1. In the vertical direction, the direction toward the 1 st housing 11 is defined as the upward direction, and the direction away from the 1 st housing 11 is defined as the downward direction. The direction orthogonal to the front-rear direction and the up-down direction is defined as the left-right direction.

First, a detailed structure of the main body case 10 will be described. As described above, the main body case 10 includes the 1 st case portion 11 and the 2 nd case portion 15.

As shown in fig. 1 and 2, the 1 st housing part 11 of the main body housing 10 is formed in a cylindrical shape as a whole. The inner case 17 fits into the opening 110 at the rear end of the 1 st case 11, and closes the opening 110. The main shaft 40 and the drive mechanism 4 are disposed in a space defined by the 1 st housing 11 and the inner housing 17.

The 2 nd housing portion 15 of the main body housing 10 is a hollow body connected to the rear end portion of the 1 st housing portion 11 and extending in the up-down direction. The upper half of the 2 nd housing part 15 is connected to the rear end of the 1 st housing part 11 by screws. In the present embodiment, the 2 nd case 15 is formed by connecting 2 split bodies 15L and 15R split in the left-right direction to each other with screws. An inner case 17 fitted into the rear end portion of the 1 st case 11 is disposed in the upper half portion of the 2 nd case 15. In addition, a motor 31 is housed in the lower half of the 2 nd housing portion 15.

Next, the detailed structure of the handle body 2 will be described. As shown in fig. 1 to 3, the handle body 2 includes a grip portion 21, an upper extension portion 23 connected to an upper end of the grip portion 21, and a lower extension portion 25 connected to a lower end of the grip portion 21. The handle body 2 of the present embodiment is formed by connecting 2 split bodies 2L, 2R split in the left-right direction to each other with screws.

The grip 21 is a cylindrical portion extending in the up-down direction rearward of the main body case 10, and is formed to have a thickness that can be gripped by a user.

The upper extension 23 extends upward and forward (toward the main body casing 10) of the grip 21. The front end portion of the upper extension portion 23 is elastically connected to the rear upper end portion of the main body casing 10 (the 2 nd casing portion 15). The elastic connection structure between the upper extension 23 and the main body case 10 will be described in detail later.

The lower extension 25 extends downward and forward of the grip 21. The lower extension 25 includes a controller housing portion 26, a rotational connection portion 27, and an opposing portion 28.

The controller housing portion 26 is formed in a box shape and is connected to the lower end of the grip portion 21. A part of the controller housing portion 26 protrudes forward from the grip portion 21. The controller housing portion 26 defines a housing space for the controller 30 below the grip portion 21.

A battery mounting portion 261 is provided at a lower end portion of the controller housing portion 26 (below the controller 30). The battery mounting portion 261 is configured to detachably receive a rechargeable battery (also referred to as a battery pack) 93. Since the battery mounting portion 261 has a pair of rails that can be physically engaged with a pair of grooves of the battery 93 and terminals that can be electrically connected to terminals of the battery 93, a detailed illustration and description are omitted because of a known structure. The lower end of the 2 nd housing 15 protrudes downward from the lower end of the controller housing 26. When the battery 93 is mounted to the battery mounting portion 261, the front surface of the battery 93 faces the rear surface of the lower end portion of the 2 nd housing portion 15.

In the present embodiment, by providing the battery mounting portion 261 to the handle body 2, chatter when the battery 93 is mounted can be reduced as compared with the case where the battery mounting portion 261 is provided to the main body case 10. Further, since the mass of the battery 93 is added to the mass of the handle body 2, further reduction in vibration of the handle body 2 when the battery 93 is mounted can be achieved.

The rotation connection portion 27 is a portion protruding obliquely downward from the front end portion of the controller housing portion 26. The rotation connection portion 27 is rotatably connected to the main body case 10 about a rotation axis PX extending in the left-right direction (i.e., a direction orthogonal to the drive axis DX). The connection structure between the rotation connection portion 27 and the main body case 10 will be described in detail later.

As shown in fig. 2 to 5, the facing portion 28 is a portion protruding obliquely upward from the front end portion of the controller housing portion 26. The facing portion 28 is disposed so as to face the grip portion 21 in the front-rear direction. Specifically, the facing portion 28 is configured such that a projection area from the rear of the grip portion 21 overlaps with a part of the facing portion 28. Alternatively, the facing portion 28 may be configured such that a straight line extending in the front-rear direction passes through the grip portion 21 and the facing portion 28. In the present embodiment, the grip portion 21 has a relatively thin cylindrical shape for easy grip by the user, and the width of the opposing portion 28 in the lateral direction is larger than the outer diameter (width in the lateral direction) of the handle body 2. Therefore, the facing portion 28 protrudes to the left and right than the projection area from the rear of the grip portion 21. In other words, when the hammer drill 1 is viewed from the rear, a part of the facing portion 28 is located on the left side of the grip portion 21, and the other part of the facing portion 28 is located on the right side of the grip portion 21.

The outer surface of the rear wall portion of the facing portion 28 (i.e., the rear surface of the rear wall portion facing the grip portion 21, hereinafter referred to as a facing surface 280) is inclined forward as it goes upward. That is, the facing surface 280 extends obliquely upward and forward from the front end of the upper surface of the controller housing portion 26.

Next, the details of the elastic connection structure of the main body case 10 and the handle body 2 will be described.

As described above, in the present embodiment, the rotation connection portion 27 of the lower extension portion 25 of the handle body 2 is rotatably connected to the main body case 10 with respect to the main body case 10. On the other hand, the upper extension 23 is connected to the main body case 10 so as to be movable in the front-rear direction, and is biased in a direction away from the main body case 10 (i.e., rearward) by the elastic body 230.

First, a connection structure of the rotation connection portion 27 and the main body case 10 will be described.

As shown in fig. 3, the rotation coupling portion 27 includes a coupling shaft 271 extending in the left-right direction. On the other hand, as shown in fig. 2, an opening 151 that opens rearward is provided at the rear lower end portion of the 2 nd housing portion 15 of the main body housing 10. The rotation connection portion 27 is inserted into the lower end portion of the 2 nd housing portion 15 through the opening 151. A portion below the opening 151 in the rear lower end portion of the 2 nd housing portion 15 is configured as a shaft supporting portion 152 that rotatably supports both end portions of the connection shaft 271.

As shown in fig. 6, the shaft support portion 152 has 2 concave portions 153 formed in the left side wall portion (split body 15L) and the right side wall portion (split body 15R) of the 2 nd housing portion 15, respectively. Both ends of the connection shaft 271 are disposed in the concave portions 153, respectively, and are rotatably supported about the rotation axis PX. In contrast to this example, 2 concave portions may be formed in the left and right side wall portions of the rotation connection portion 27, respectively, and 2 protrusions may protrude from the left and right side wall portions of the main body case 10 into the concave portions, respectively, to rotatably support the rotation connection portion 27. Or the rotation coupling portion 27 and the main body case 10 may be coupled in a relatively rotatable manner by separate shafts.

In the present embodiment, an annular elastic body 270 (O-ring) is attached to the outer periphery of both end portions of the connection shaft 271, and the elastic body 270 is fitted into the recess 153. That is, the connection shaft 271 is connected to the 2 nd housing portion 15 via the 2 nd elastic bodies 270. According to this structure, the handle body 2 can be moved in all directions intersecting the rotation axis PX, in addition to being rotated about the rotation axis PX extending in the left-right direction with respect to the main body case 10. Accordingly, the transmission of vibration from the shaft support portion 152 to the connection shaft 271 can be reduced. However, the elastic body 270 may be omitted, and the connection shaft 271 may be directly rotatably supported by the shaft support 152.

Next, a connection structure between the upper extension 23 and the main body case 10 will be described.

As shown in fig. 7, an opening 113 that opens rearward is provided in the rear upper end portion of the 2 nd housing portion 15 of the main body housing 10. The front half of the upper extension 23 extends forward of the grip 21, is partially inserted into the rear upper end of the main body case 10 through the opening 113, and is connected to the main body case 10. Hereinafter, the front half of the upper extension 23 is referred to as an upper connection 24. The portion of the rear upper end portion of the 2 nd housing portion 15 in front of the opening 113, i.e., the portion accommodating the upper connection portion 24, is referred to as a handle accommodating portion 12.

As shown in fig. 3, 7, and 8, the upper connecting portion 24 is entirely a hollow body long in the front-rear direction, and defines an inner space 240 long in the front-rear direction. Further, openings 241 are formed at the distal ends of the left side wall portion (split body 2L) and the right side wall portion (split body 2R) of the upper connecting portion 24, respectively, to communicate the internal space 240 of the upper connecting portion 24 with the outside. The left and right 2 openings 241 are formed corresponding to the front half of the internal space 240 and are located at substantially the same position in the front-rear direction. According to this structure, a through hole 245 penetrating the upper connecting portion 24 is formed in the left-right direction in the front half of the upper connecting portion 24.

According to the above structure, the inner space 240 is a space in which the left and right sides of the front half are opened (communicate with the outside) through the opening 241, and the remaining part is surrounded (closed). In the present embodiment, the handle body 2 is formed by connecting the left and right split bodies 2L, 2R to each other. Thus, the internal space 240 having such a structure can be easily formed in the handle body 2 by connecting the split bodies 2L, 2R with a simple structure.

As shown in fig. 7 and 8, a beam portion 121 is provided inside the handle housing portion 12. More specifically, the beam portion 121 extends substantially in the left-right direction between the left and right side wall portions of the handle housing portion 12. The beam 121 is formed by a portion of the left split body 15L and the right split body 15R that are connected to each other by the screw 125.

Specifically, the beam portion 121 is formed by connecting a connection protrusion 122 provided integrally with the left split body 15L and a receiving portion 123 provided integrally with the right split body 15R. The connection protrusion 122 protrudes rightward from the inner surface of the left side wall portion of the split body 15L. The receiving portion 123 includes a recess formed in the inner surface of the right side wall portion of the split body 15R. The connection protrusion 122 is inserted into a through hole 245 (left opening 241, inner space 240, right opening 241) of the upper connection portion 24, and the distal end portion of the connection protrusion 122 is fitted into the receiving portion 123. The screw 125 is fitted into a screw hole formed in the connection protrusion 122 through a through hole formed in the receiving portion 123. The dimension of the opening 241 in the front-rear direction is set to be larger than the dimension of the connection protrusion 122 in the front-rear direction. According to this structure, the upper connecting portion 24 and the handle housing portion 12 are connected so that the connecting projection 122 can move relatively within a movable range within the opening 241.

An elastic body 230 is disposed in the inner space 240 of the upper connecting portion 24. In the present embodiment, the elastic body 230 is a compression coil spring. The elastic body 230 is disposed between the upper connecting portion 24 and the connecting protrusion 122 of the handle housing portion 12 so as to apply a loading force substantially parallel to the drive axis DX (i.e., in the front-rear direction).

More specifically, the rear half portion (portion on the rear side of the opening 241) of the upper connecting portion 24 is configured to be capable of fitting into the spring support portion 247 of the elastic body 230. A portion including the rear end of the elastic body 230 is inserted and supported in the spring bearing 247 (the rear half of the inner space 240). The rear end of the elastic body 230 abuts against a surface 243 defining the rear end of the internal space 240. A part including the front end of the elastic body 230 is disposed in the front half of the inner space 240 (the portion/through hole 245 communicating with the outside through the opening 241). The front end of the elastic body 230 abuts against the rear end of the connection protrusion 122 inserted into the through hole 245. That is, the connection protrusion 122 also functions as a spring receiving portion (spring seat) that receives the tip end of the elastic body 230.

The elastic body 230 biases the upper connecting portion 24 and the connecting protrusion 122 (beam portion 121) in the front-rear direction so as to separate the handle body 2 and the main body case 10 from each other. That is, the elastic body 230 biases the upper end portion of the handle body 2 rearward with respect to the main body case 10. In an initial state in which an external force against the urging force of the elastic body 230 is not applied, the tip end of the connecting projection 122 abuts against a part of the upper connecting portion 24 (specifically, the surface 244 defining the tip end of the opening 241), thereby preventing the upper end portion of the handle body 2 from further moving rearward. That is, the connection protrusion 122 also functions as a positioning portion that defines the initial position of the handle body 2 with respect to the main body case 10.

As shown in fig. 7, in the present embodiment, when the handle body 2 is located at the initial position (i.e., when located at the rearmost position with respect to the main body case 10), the rear end 242 of the opening 241 of the upper connecting portion 24 is located at a position forward of the opening 113 of the main body case 10. That is, the entirety of the opening 241 is always located inside the main body casing 10. With this arrangement, it is possible to suppress malfunction of the elastic body 230 due to dust entering the internal space 240 from the opening 241.

On the other hand, when an external force is applied to bring the upper end portion of the handle body 2 forward, the handle body 2 rotates about the rotation axis PX with respect to the main body case 10, and as shown in fig. 9, the upper end portion of the handle body 2 moves substantially forward against the urging force of the elastic body 230. More specifically, the connection protrusion 122 moves rearward in the opening 241 while compressing the elastic body 230 (compression coil spring). In the present embodiment, since the handle body 2 is rotated, the upper connecting portion 24 moves slightly obliquely forward and downward with respect to the main body case 10. Therefore, the dimensions of the opening 241 and the connection protrusion 122 in the up-down direction are set so that the connection protrusion 122 does not interfere with the upper side connection portion 24.

In this way, by relatively moving the handle body 2 and the main body case 10 in a state where the urging force of the elastic body 230 acts, the vibration transmitted from the main body case 10 to the handle body 2 is reduced. Further, ribs 127 are provided on the inner surfaces of the left and right wall portions of the handle housing portion 12. The tip ends of the ribs 127 are substantially in contact with the outer surfaces of the left and right side wall portions of the upper-side connecting portion 24. The rib 127 prevents the handle body 2 from tilting in the left-right direction with respect to the main body casing 10 when the handle body 2 and the main body casing 10 are relatively moved.

As shown in fig. 2, in the present embodiment, the upper connecting portion 24 (more specifically, the elastic body 230) is disposed directly above the rotation axis PX. In other words, a straight line L extending in the up-down direction, which is orthogonal to the rotation axis PX, passes through the upper connecting portion 24 (in detail, the elastic body 230). A tangent line to a line segment connecting the intersection of the straight line L and the long axis of the elastic body 230 (compression coil spring) and the rotation axis PX is a radius, and a circle centered on the rotation axis PX substantially coincides with the long axis of the elastic body 230 (compression coil spring) (i.e., an axis extending in the direction in which the elastic body 230 applies a loading force). Therefore, the possibility of applying an unreasonable stress to the elastic body 230 when the handle body 2 rotates is reduced, whereby the life of the elastic body 230 can be prolonged.

As described above, in the present embodiment, the rotation connection portion 27 extends downward from the controller housing portion 26 in the up-down direction, and therefore, the rotation axis PX is located below the battery mounting portion 261. Accordingly, it is ensured that the distance of the elastic body 230 from the rotation axis PX is as large as possible. Therefore, even if the stroke of the elastic body 230 is relatively large, the movement of the upper connecting portion 24 can be made to approach the parallel movement (linear movement) in the front-rear direction.

As shown in fig. 7 and 9, the upper extension 23 of the present embodiment includes an abutment portion 235 extending downward from the distal end portion of the upper connection portion 24. An abutment portion 175 is provided immediately in front of the abutment portion 235 in the rear end portion of the inner housing 17.

The contact portion 175 contacts the contact portion 235 of the handle body 2 from the front, thereby preventing the upper end portion of the handle body 2 from moving further forward. That is, the abutment portion 175 defines the foremost position of the handle body 2 with respect to the main body case 10. In other words, the abutment portion 175 defines the movement limit of the handle body 2 with respect to the main body case 10, and further defines the upper limit of the deformation amount of the elastic body 230 (the maximum compression amount of the compression coil spring). Accordingly, excessive load is prevented from being applied to the elastic body 230, and the life of the elastic body 230 can be prolonged. The contact portion 175 of the present embodiment is formed of an elastomer (e.g., an elastomer, a synthetic resin foam). Therefore, the impact at the time of collision of the abutting portion 235 with the abutting portion 175 can be relaxed, and further, the abrasion of the abutting portion 235 can be suppressed.

As described above, in the present embodiment, the handle body 2 and the main body case 10 are connected to each other so as to be relatively movable in the front-rear direction by the upper connecting portion 24 and the connecting protrusion 122 protruding into the internal space 240 through the opening 241 of the upper connecting portion 24. The elastic body 230 is disposed in the inner space 240 of the upper connecting portion 24 rearward of the connecting projection 122. That is, the upper connecting portion 24 functions as a housing for the elastic body 230 in addition to the function of connecting the handle body 2 and the main body case 10 in cooperation with the connecting protrusion 122. Therefore, the connection structure between the handle body 2 and the main body case 10 and the elastic body 230 can be accommodated in a relatively small area in the front-rear direction. Accordingly, the hammer drill 1 can be miniaturized in the front-rear direction. Or the relative movable distance between the handle body 2 and the main body case 10 can be increased without increasing the size of the hammer drill 1 in the front-rear direction.

In the present embodiment, one (15L on the left side) of the left and right 2 split bodies 15L, 15R of the 2 nd housing portion 15 of the main body housing 10 is provided with a connecting protrusion 122 protruding in the left and right direction, and the handle body 2 is provided with an opening 241 into which the connecting protrusion 122 is inserted. Therefore, the assembly worker can place the split body 15L on the work table in a direction in which the connection protrusion 122 protrudes upward, align the assembled handle body 2 with the connection protrusion 122 from the upper position, and easily insert the connection protrusion 122 into the internal space 240 from the left opening 241.

In the present embodiment, the beam 121, which is a connecting portion between the split bodies 15L and 15R of the 2 nd housing 15, is used for the connection with the upper connecting portion 24, and therefore, it is not necessary to separately provide a connecting portion between the main body housing 10 and the upper connecting portion 24. Therefore, the structure of the main body casing 10 can be simplified. In addition, after the handle body 2 is placed on the left split body 15L as described above, the assembly worker places the right split body 15R thereon, and easily connects the connection protrusion 122 and the receiving portion 123 with the screw 125.

Next, the constituent elements (mechanisms) housed in the main body case 10 will be described.

As shown in fig. 2, the motor 31 is accommodated in the lower half of the 2 nd housing portion 15. The motor 31 of the present embodiment is a brushless motor, and includes a motor main body 310 including a stator and a rotor, and a motor shaft 315. The motor shaft 315 is a shaft rotatable integrally with the rotor around a motor axis MX, protruding from the rotor. In the present embodiment, the motor 31 is configured such that the motor axis MX extends slightly obliquely with respect to the up-down direction of the hammer drill 1 and intersects the drive axis DX.

The main shaft 40 of the present embodiment is an elongated stepped cylindrical member, and is supported on the upper half of the 1 st housing 11 so as to be extendable in the front-rear direction. In addition, the main shaft 40 is rotatably supported about the drive axis DX. The front half of the spindle 40 constitutes a tool holder 401. The tool holder 401 is configured to detachably hold the tip tool 91 in a state where the long axis thereof coincides with the drive axis DX. The tip tool 91 is held in a state in which movement in the axial direction with respect to the tool holder 401 is allowed and rotation about the axis is restricted.

The driving mechanism 4 is operatively connected to the motor 31 (motor shaft 315), and drives the tool bit 91 by the power of the motor 31. The driving mechanism 4 of the present embodiment includes an impact mechanism 41 for impact action and a rotation transmission mechanism 46 for rotation action. The impact mechanism 41 and the rotation transmission mechanism 46 are both known mechanisms, and therefore, will be described briefly below.

The impact mechanism 41 includes a motion conversion mechanism 42 and an impact structural element 44. The motion conversion mechanism 42 is operatively connected to the motor shaft 315, and converts rotational motion of the motor shaft 315 into linear motion along the drive axis DX for driving the tip tool 91. In the present embodiment, a known mechanism using a swing member 43 called a swash bearing (swash bearing), a swing bearing (swing bearing), or the like is employed as the motion conversion mechanism 42. The impact structure element 44 is configured to linearly move along the driving axis DX to apply an impact force to the tip tool 91, and thereby linearly drive the tip tool 91 to reciprocate. The rotation transmission mechanism 46 is operatively connected to the motor shaft 315, and transmits rotation of the motor shaft 315 to the tool holder 401 (spindle 40). The rotation transmission mechanism 46 typically employs a reduction gear mechanism.

The hammer drill 1 has a plurality of operation modes and a mode switching mechanism for switching the operation modes, but since the hammer drill has a known structure, detailed description and illustration are omitted. The mode switching mechanism switches the impact mechanism 41 to an operable state only when an operation mode for performing the impact operation is selected. The mode switching mechanism switches the rotation transmission mechanism 46 to an operable state only when an operation mode for performing a rotation operation is selected.

Next, the constituent elements (mechanisms) disposed in the handle body 2 will be described.

As described above, the grip portion 21 is provided with the trigger 211, and the main switch 213 is housed in the grip portion 21. The main switch 213 is always off and is turned on in response to the pressing of the trigger 211. The main switch 213 is electrically connected to a controller 30 described later.

A controller 30 is accommodated in the controller accommodation portion 26 of the lower extension portion 25. The controller 30 includes at least a control circuit configured to control the operation of the hammer drill 1. The controller 30 is electrically connected to the main switch 213, a switch 7 described later, and a notification unit 8 (see fig. 12). In the present embodiment, the controller 30 is housed in the handle body 2, thereby protecting it from vibration.

As shown in fig. 1, the facing portion 28 is provided with an operation portion 6 and a notification portion 8, wherein the operation portion 6 is manually operable by a user; the notification unit 8 is configured to notify information about the state of the hammer drill 1. As shown in fig. 10, a switch 7 is housed in the facing portion 28, and the switch 7 is configured to be operated (switched on/off) in response to a manual operation of the operation portion 6.

Next, the switch 7 will be described.

As shown in fig. 10 to 12, in the present embodiment, 2 switches 7 are used, and 2 switches 7 output signals for setting the rotation speed of the motor 31. More specifically, one of the 2 switches 7 is a switch for changing the rotational speed of the motor 31 to a speed higher than the currently set rotational speed, and the other is a switch for changing the rotational speed of the motor 31 to a speed lower than the currently set rotational speed. In the following description, the case where 2 switches 7 are collectively referred to and the case where either one is not specified will be simply referred to as a switch 7. The 1 st switch 71 is a switch for changing the rotation speed of the motor 31 to a high speed among the 2 switches 7, and the 2 nd switch 72 is a switch for changing the rotation speed of the motor 31 to a low speed.

The 2 switches 7 of the present embodiment are each configured as a push switch having a push button 70. More specifically, the switch 7 is normally kept off, and is configured as a push-button momentary switch (so-called tact switch) that is turned on only during a pressed operation. The switch 7 is configured to output a predetermined digital signal to the controller 30 (see fig. 2) in response to being turned on.

In the present embodiment, the maximum rotation speed of the motor 31 can be switched stepwise between 4 steps from step 1 to step 4. The controller 30 changes the highest rotational speed of the motor 31 to a rotational speed of one step higher in order in response to the acquisition of the signal from the 1 st switch 71. Likewise, the controller 30 changes the highest rotational speed of the motor 31 to a rotational speed lower by one step in response to the acquisition of the signal from the 2 nd switch 72. The controller 30 controls the rotation speed of the motor 31 according to the set maximum rotation speed and the operation amount (pressing amount) of the trigger 211.

In the present embodiment, 2 switches 7 are mounted on a common circuit board 50, and are connected to the controller 30 via wires connected to the circuit board 50. The circuit board 50 is elongated corresponding to an operation panel 60 of the operation unit 6 described later, and is fixed to and integrated with the operation panel 60. The 1 st switch 71 is disposed on the right end portion of the circuit board 50, and the 2 nd switch 72 is separated from the 1 st switch 71 and disposed on the left end portion of the circuit board 50.

Next, the notification unit 8 will be described.

The notification unit 8 of the present embodiment is configured to notify, as information on the state of the hammer drill 1, information on the maximum rotation speed of the currently set motor 31 and information on the currently set operation mode. More specifically, as shown in fig. 12, the notification unit 8 includes: 4 LEDs 81 for informing information related to the maximum rotation speed of the motor 31; and an LED83 for informing information related to the operation mode. The LEDs 81 and 83 are mounted on the circuit board 50 shared by the switch 7, and are connected to the controller 30 via wires connected to the circuit board 50.

The 4 LEDs 81 are arranged in a straight line between the 1 st switch 71 and the 2 nd switch 72 in the left-right direction. The 4 LEDs 81 correspond in sequence to the 4 levels of the highest rotational speed of the motor 31 from left to right. The controller 30 is configured to turn on one of the 4 LEDs 81 in accordance with the rotation speed level set as described above.

The LED83 is disposed between the leftmost LED81 and the leftmost 2 nd switch 72. The controller 30 is configured to turn on the LED83 when a specific operation mode is selected.

Next, the operation unit 6 will be described.

The operation unit 6 is configured to cover the switch 7 and to allow a user to press the push button 70 for operating the switch 7 from the outside. More specifically, as shown in fig. 1 and 10, the operation unit 6 of the present embodiment is provided continuously with the outer surface (facing surface 280) of the facing portion 28. More specifically, the outer surface 600 of the operation portion 6 and the facing surface 280 are substantially located in the same plane. In other words, there is substantially no step between the outer surface 600 of the operation portion 6 and the facing surface 280. The "surface" is not limited to a plane, and may be a surface that is at least partially curved, and may allow a slight step.

As shown in fig. 10, the operation unit 6 of the present embodiment includes an operation panel 60 and a flexible sheet 67, wherein the operation panel 60 has a button 65 that is displaceable in response to a pressing operation by a user; the flexible sheet 67 covers the operation panel 60 from the outside.

As shown in fig. 10 to 13, the operation panel 60 includes a base portion 61 and 2 buttons 65 supported by the base portion 61.

The base portion 61 is formed in a flat plate shape having a substantially rectangular shape as a whole. The operation panel 60 is disposed such that the longitudinal direction of the base portion 61 substantially coincides with the left-right direction of the hammer drill 1. The circuit board 50 is disposed so that the surfaces of the LEDs 81 and 83 on which the switch 7 and the notification unit 8 are mounted face one surface of the base unit 61, and is fixed to the base unit 61.

More specifically, 2 protrusions 613 having screw holes are provided on one surface of the base portion 61. Corresponding through holes are formed in the circuit board 50. The circuit board 50 is fixed to the base portion 61 by the screw 51 in a state where the surface of the LEDs 81 and 83 on which the switch 7 and the notification portion 8 are mounted is in contact with the tip end surface of the protrusion 613. Accordingly, the circuit board 50, the switch 7, the notifying unit 8, and the operating unit 6 are integrated to form a single unit (unit) (hereinafter also referred to as a switch unit 5). The base portion 61 is disposed substantially parallel to the circuit board 50, and is separated from the LEDs 81 and 83 of the switch 7 and the notification portion 8. In the following description, one surface of the base portion 61 facing the circuit board 50 is referred to as an inner surface 611, and the other surface (the surface on the opposite side to the circuit board 50) is referred to as an outer surface 612.

Each button 65 is disposed in a hole 62 formed in the base portion 61, and is connected to the base portion 61 via 2 arm portions 66. In more detail, 2 holes 62 are formed at the left and right ends of the base portion 61, respectively. Each hole 62 penetrates the base portion 61 in the plate thickness direction. The 2 buttons 65 are arranged in the central portions of the two holes 62. In the present embodiment, the hole 62 and the button 65 are both circular, and the hole 62 and the button 65 are arranged concentrically. The positions of the 2 holes 62 and the buttons 65 are set so that the central portions of the 2 buttons 65 face the push buttons 70 of the 2 switches 7 mounted on the circuit board 50. In an initial state in which no external force is applied to the button 65, the button 65 is separated from the push button 70 of the switch 7.

The 2 arm portions 66 connecting the respective buttons 65 and the base portion 61 are each formed in a rod shape. Each arm 66 extends radially outward from the outer edge of the button 65 in the hole 62 of the base portion 61, and is connected to the base portion 61. In the present embodiment, the base portion 61, the push button 65, and the arm portion 66 are integrally molded with synthetic resin. That is, the operation panel 60 is an integrally molded member made of synthetic resin.

Each arm 66 is bendable (elastically deformable) relative to the base portion 61 in a direction (a direction substantially orthogonal to the inner surface 611) in which the base portion 61 faces the circuit board 50. Further, protruding portions protruding radially outward are provided at 2 portions of the hole 62. The arm 66 extends from the button 65 into the protruding portion and is connected to the base portion 61. Accordingly, the length of the arm 66 can be ensured while minimizing the gap between the button 65 and the base 61, and the arm 66 can be easily bent. When the arm 66 is bent (elastically deformed) in response to the push button 65 being pushed, the push button 65 moves in a direction approaching the circuit board 50, and the push button 70 of the switch 7 is pushed to turn on the switch 7.

The angle α formed by the 2 arm portions 66 corresponding to the respective buttons 65 is preferably in the range of approximately 60 degrees to 90 degrees. This is because the operability of the button 65 tends to be lowered as the angle α is larger than 90 degrees, and the arm 66 tends to twist when the button 65 is pressed as the angle α is smaller than 60 degrees. Further, the twisting of the arm 66 may cause the center portion of the button 65 to deviate from the direction of movement of the straight line connecting the button 65 and the push button 70 of the switch 7, and the button 65 may not be able to properly turn on the switch 7 (cause of malfunction). From the viewpoints of operability of the push button 65 and the push button 70 of the switch 7 and suppression of torsion, the angle α is considered to be optimal at 90 degrees. Therefore, in the present embodiment, the angle α formed by the 2 arm portions 66 is substantially 90 degrees.

In the following description, the case where 2 buttons 65 are collectively referred to and the case where either one is not specified will be simply referred to as a button 65. The 1 st button 651 is designated in the case of designating the right button among the 2 buttons 65, and the 2 nd button 652 is designated in the case of designating the left button. Note that, when the arm 66 corresponding to the 1 st button 651 and the arm 66 corresponding to the 2 nd button 652 are collectively referred to, and when either one is not specifically specified, the arm 66 is simply referred to. The 1 st arm 661 is the 2 nd arm 662 in the case of specifying 2 arms corresponding to the 1 st button 651 in the arm 66, and the 2 nd arm 652 in the case of specifying 2 arms corresponding to the 2 nd button 652.

The 21 st arm portions 661 connecting the 1 st button 651 on the right side and the base portion 61 extend away from each other as they come closer to the 2 nd button 652 (toward the center/left side in the left-right direction of the base portion 61) from the 1 st button 651. I.e. extends in a V-shape towards the left. The 2 nd arm portions 662 connecting the 2 nd button 652 on the left side and the base portion 61 extend away from each other as they come closer to the 1 st button 651 from the 2 nd button 652 (toward the center in the right-left direction of the base portion 61/toward the right side). That is, the right side extends in a V-shape.

According to this configuration, the 1 st button 651 and the 2 nd button 652 can be made as close to the left end and the right end of the operation panel 60 (the base portion 61), respectively, as possible. As described above, the facing portion 28 protrudes to the left and right sides from the projection area from the rear of the grip portion 21. The 1 st button 651 and the 2 nd button 652 are each at least partially located outside the projection area in the left-right direction. That is, when the hammer drill 1 is viewed from the rear, a part of the 1 st button 651 is located on the right side of the grip 21, and a part of the 2 nd button 652 is located on the left side of the grip 21 (see fig. 5).

The operation panel 60 is provided with a projection 615, and the projection 615 projects from the inner surface 611 of the base portion 61 toward the circuit board 50. The protruding portion 615 is provided between the 2 holes 62 in the left-right direction, and has 5 passages corresponding to the LEDs 81 and 83, respectively, and 5 openings 616 for allowing light of the LEDs 81 and 83 to pass through the outer surface 612 of the base portion 61.

As shown in fig. 10, in the present embodiment, the operation panel 60 is supported by the facing portion 28, and accordingly, the entire switch unit 5 is supported by the facing portion 28. More specifically, the operation panel 60 is provided with a pair of protruding pieces 617, and the pair of protruding pieces 617 protrude from the ends corresponding to the pair of long sides of the base portion 61 substantially parallel to the inner surface 611. On the other hand, an opening 283 having a shape corresponding to the operation panel 60 is formed in the rear wall of the facing portion 28. Inside the facing portion 28, a rib 284 is provided adjacent to the upper end (front end) and the lower end (rear end) of the opening 283. The operation panel 60 is supported by the facing portion 28 in a state in which the base portion 61 is fitted into the opening 283 and the 2 protruding pieces 617 are fitted between the rear wall portion and the rib 284. The base portion 61 is fitted into the opening 283 with substantially no gap, whereby dust is prevented from entering the interior of the handle body 2 from the opening 283.

As shown in fig. 10 and 11, the flexible sheet 67 is attached to the operation panel 60 so as to cover the entire outer surface 612 of the base portion 61 of the operation panel 60 and the push button 65. More specifically, the flexible sheet 67 is bonded to the outer edge portion of the base portion 61, thereby integrating the operation panel 60. The outer surface of the flexible sheet 67 is substantially in the same plane as the facing surface 280 (the outer surface of the facing portion 28), and forms the outer surface 600 of the operation portion 6. The hole 62 of the operation panel 60 is covered with the flexible sheet 67 to prevent dust from entering the interior of the handle body 2 from the operation portion 6.

The flexible sheet 67 is a synthetic resin sheet having flexibility. The material of the flexible sheet 67 is not particularly limited, and for example, polyethylene terephthalate (PET), polycarbonate, or the like can be used.

As shown in fig. 1, marks and/or characters related to the type of the switch 7 and information notified by the notification unit 8 are marked on the outer surface 600 of the flexible sheet 67. In the present embodiment, a flag 671 indicating a plus (+) button for increasing the rotation speed is marked at a position corresponding to the 1 st switch 71 and the 1 st button 651. In addition, a flag 672 indicating a decrease (-) button for decreasing the rotation speed is marked at a position corresponding to the 2 nd switch 72 and the 2 nd button 652. In addition, these marks may be formed by embossing.

Further, transparent 5 windows 675 for transmitting light of the LEDs 81 and 83 are provided at portions corresponding to the LEDs 81 and 83 (the opening 616 of the base portion 61) of the notification portion 8, respectively. Accordingly, the user can visually confirm the light of the LEDs 81 and 83 through the opening 616 (see fig. 12) and the window 675.

As described above, the switch 7 is accommodated in the handle body 2 connected to the main body case 10 via the elastic members 230 and 270, and is protected from vibration. The operation unit 6, which is manually operated to turn on the switch 7, is provided continuously with the outer surface (specifically, the facing surface 280) of the handle body 2. That is, unlike the rotary or slide type operation portion (e.g., dial, slide lever), the operation portion 6 does not substantially protrude from the outer surface (facing surface 280) of the handle body 2. Therefore, the possibility that the user presses the operation portion 6 with a hand or another object to turn on the switch 7 can be reduced. In addition, the operation unit 6 of the present embodiment is less likely to generate a gap between the operation unit and the handle body 2 than a rotary or sliding operation unit. Therefore, the possibility of dust entering the handle body 2 through the gap and causing malfunction of the switch 7 can be reduced.

Further, since the operation unit 6 of the present embodiment is provided in the facing portion 28 of the handle body 2 that faces the grip portion 21 in the front-rear direction, the user can easily operate the operation unit 6 from the rear side even in a state where the user grips the grip portion 21. In particular, the operation portion 6 is provided continuously with the facing surface 280, and therefore, the operability is excellent, in which the facing surface 280 is inclined so as to be inclined upward as it goes forward. In addition, the user can visually confirm a part of the 1 st button 651 and the 2 nd button 652 from the rear of the grip portion 21, and thus the operation is easy.

In the present embodiment, the light of the LEDs 81 and 83 of the notification portion 8 can be visually confirmed through the window 675 of the flexible sheet 67. Since the notification unit 8 is disposed between the 1 st button 651 and the 2 nd button 652 in the left-right direction, the user can easily visually confirm the information (the level of the rotational speed, the operation mode) notified by the LEDs 81 and 83 together with the operation unit 6.

The correspondence between each component (feature) of the above embodiment and each component (feature) of the present application or the application is shown below. However, the constituent elements of the embodiment are merely examples, and the present application or the constituent elements of the present application are not limited thereto.

The hammer drill 1 is an example of a "reciprocating tool". The impact mechanism 41 is an example of a "reciprocating mechanism". Elastomer 230 is an example of an "elastomer". The upper connecting portion 24 of the handle body 2 is an example of the "1 st connecting portion". The connection protrusion 122 of the main body case 10 is an example of the "2 nd connection portion". The split bodies 2L and 2R are examples of "2 handle split bodies". The split bodies 15L and 15R are examples of "2 main body split bodies". The opening 113 is an example of a "rear end opening". The shaft support portion 152 of the main body case 10 is an example of the "3 rd connection portion". The connection shaft 271 is an example of a "4 th connection portion".

The above-described embodiments are merely examples, and the reciprocating tool according to the present invention is not limited to the example hammer drill 1. For example, non-limiting variations of the following examples can be added. At least 1 of these modifications can be used in combination with the hammer drill 1 described in the embodiment and any of the inventions described in the respective embodiments.

For example, the reciprocating tool according to the present invention may be embodied as an impact tool (for example, an electric hammer (demolition hammer, scraper)) configured to perform only an impact operation, or as a reciprocating cutting tool (for example, a reciprocating saw) configured to perform a cutting operation by reciprocating a tip tool (for example, a blade).

The structure and/or arrangement of the motor and/or the reciprocating mechanism in the reciprocating tool can be appropriately changed from the examples of the above-described embodiments. For example, the motor may be disposed such that the motor shaft is orthogonal to the drive axis, or may be disposed such that the motor shaft extends parallel to the drive axis. The reciprocating mechanism may be a known mechanism using a crankshaft, for example.

The structure of the main body case and/or the handle body, and the connection manner of the main body case and the handle body are not limited to the examples of the above embodiments. For example, the body housing need not be L-shaped. The entire main body case may be formed by connecting 2 split bodies divided in the left-right direction to each other. For example, the handle body may be a cantilever-shaped handle body in which only one end of the handle body is connected to the main body case. The 2 ends of the U-shaped handle body may be connected to the main body case so as to be movable substantially only in the front-rear direction with respect to the main body case. In this modification, the 2 end portions of the handle body may be connected to the main body case by the same connection structure as the connection structure formed by the upper connection portion 24, the connection protrusion 122, and the elastic body 230 in the above embodiment.

The elastic body located between the main body case and the handle body can be appropriately used as various springs, elastic bodies, synthetic resin foam bodies, or the like, which are different from the examples of the above embodiments.

In view of the gist of the present invention, the above-described embodiments, and modifications thereof, the following aspects A1 to A7 are constructed. At least 1 of the following embodiments can be used in combination with at least 1 of the above-described embodiments and modifications thereof, and the inventions described in the respective embodiments.

Mode A1

An abutment portion is provided in the main body case, and is configured to define a foremost position of the handle body with respect to the main body case by abutting the handle body when the handle body moves forward from the initial position with respect to the main body case.

The "contact portion 175" is an example of the "contact portion" of the present embodiment.

Mode A2

The abutment is formed of the 2 nd elastic body.

Mode A3

The 3 rd elastomer is interposed between the 3 rd and 4 th connection portions.

The elastic body 270 is an example of "the 3 rd elastic body" of the present embodiment.

Mode A4

The handle body has a battery mounting portion provided below the grip portion in the up-down direction.

Mode A5

The reciprocating tool also has a controller configured to control the driving of the motor,

The controller is disposed in the handle body between the grip portion and the battery mounting portion in the up-down direction.

Mode A6

The elastic body is disposed behind the protrusion in the inner space.

Mode A7

At least a part of the main body case is formed by 2 main body split bodies connected to each other in a left-right direction orthogonal to the front-rear direction and the up-down direction,

The 2 nd connecting part is a protrusion protruding from one of the 2 main body split bodies to the other.

Further, it is an object of the present invention to provide an improvement relating to an operation portion which has a vibration-proof handle structure and is an operation portion of a manually operable impact tool, as non-limiting 1 object, and to provide the following modes B1 to B15. The following modes B1 to B15 may be used alone or 2 or more may be used in combination. Or at least 1 of the following modes B1 to B15 can be used in combination with at least 1 of the hammer drill 1 of the embodiment, the modification examples described above, modes A1 to A7, and the features described in the respective modes.

Mode B1

An impact tool, comprising:

A motor;

an impact mechanism operatively connected to the motor and configured to linearly drive the tool bit along a drive axis defining a front-rear direction of the impact tool;

a main body housing that accommodates the motor and the impact mechanism;

a handle body including a grip portion extending in an up-down direction intersecting the drive axis at a rear of the main body case, the handle body being connected to the main body case through at least 1 elastic body;

An operation unit which is manually operable by a user and is provided continuously with the outer surface of the handle body; and

At least 1 switch which is housed in the handle body and is configured to be turned on/off in response to a manual operation of the operation unit.

In the impact tool according to the present aspect, the switch is accommodated in the handle body connected to the main body case via at least 1 elastic body, and therefore, the switch can be effectively protected from vibration. The operation portion is provided continuously with the outer surface of the handle body. The feature may be that the outer surface of the handle body and the operating portion are substantially located in the same plane, and the "outer surface" is not limited to a plane, but may be an at least partially curved surface. That is, the operation portion of the present embodiment is different from a rotary or sliding operation portion (e.g., dial, trigger, rocker switch, toggle switch, switch lever, slide lever) and does not substantially protrude from the outer surface of the handle body. Therefore, the possibility of the switch being turned on by the user not intending to operate can be reduced. In addition, the operation portion according to the present embodiment is less likely to generate a gap with the handle body than a rotary or sliding operation portion. Therefore, the possibility of dust entering the handle body and causing malfunction of the switch can be reduced.

The "switch" of the present embodiment may be a mechanical switch having a mechanical contact, or an electronic switch that electronically opens and closes a circuit using a valve or a semiconductor device. At least a part of the operation unit and at least a part of the at least 1 switch may be integrated.

The impact tool according to aspect B2, characterized in that,

The operation portion is provided continuously with a facing surface of the handle body facing the grip portion.

According to this aspect, the operation portion can be disposed at a position where the user can easily operate from the rear side while gripping the grip portion.

The impact tool according to aspect B3 is characterized in that the facing surface is inclined upward as going forward.

According to this aspect, the operability of the operation unit can be further improved.

Mode (B4) the impact tool according to mode (B2) or (B3), characterized in that,

A battery mounting portion is provided in the handle body at a portion between the grip portion and the facing portion, and the battery mounting portion is configured to detachably receive a battery.

According to this aspect, compared with the case where the battery mounting portion is provided in the main body case, chatter when the battery is mounted can be suppressed. Further, by adding the mass of the battery to the mass of the handle body, further reduction in vibration of the handle body can be achieved.

The impact tool according to any one of aspects B1 to B4, characterized in that,

And a controller configured to control driving of the motor,

The at least 1 switch is configured to output a signal for setting a rotation speed of the motor to the controller in response to the manual operation of the operation portion.

According to this aspect, the user can easily change the rotation speed of the motor during the work, and therefore the convenience of the impact tool is improved.

Mode B6 the impact tool according to mode B5, characterized in that,

The at least 1 switch includes:

A1 st switch configured to output a signal for increasing the rotational speed of the motor to the controller; and

A2 nd switch configured to output a signal for reducing the rotational speed of the motor to the controller,

The operation section includes:

A1 st button which is a push button configured to move in response to a push operation, and is configured to turn on the 1 st switch; and

A 2 nd button which is a push button configured to move in response to a push operation and is configured to turn on the 2 nd switch,

The 1 st button and the 2 nd button are located at least partially outside a projection area when the grip portion is projected from the rear.

According to this aspect, the user can visually confirm at least a part of the 1 st button and the 2 nd button from behind the grip portion, and thus can easily operate the 1 st button and the 2 nd button.

[ Mode B7] the impact tool according to any one of modes B1 to B6,

The impact tool further includes a notification unit configured to visually notify information about a state of the impact tool.

According to this aspect, the user can recognize the state of the impact tool using the information notified by the notification unit. The notification unit may be embodied as an LED for notifying information by light, a display for notifying information by displaying characters and/or symbols, or the like. The information to be notified is not particularly limited, and examples thereof include information on the rotation speed of the motor currently set, information on the operation mode of the impact tool currently set, and the like.

Mode B8 the impact tool according to mode B7 as dependent on mode B6, characterized in that,

The 1 st button and the 2 nd button are separated from each other,

The notification unit is disposed between the 1 st button and the 2 nd button in a visually identifiable manner.

According to this aspect, the notification portion can be arranged at a position that is easy for the user to visually confirm together with the operation portion.

The impact tool according to any one of aspects B1 to B8, characterized in that,

The operating portion includes an operating panel disposed between the at least 1 switch and the outer surface of the handle body,

The operation panel includes a plate-shaped base portion and at least 1 push button configured to move to turn on the at least 1 switch in response to a push operation,

The at least 1 push button is disposed in a hole formed in the base portion, and is connected to the base portion via at least 2 arm portions having flexibility.

The impact tool according to aspect B10, characterized in that,

The at least 1 switch includes a1 st switch and a2 nd switch,

The at least 1 push button includes a1 st button corresponding to the 1 st switch and a2 nd button corresponding to the 2 nd switch,

The 1 st button is disposed in the 1 st hole formed in the base portion, is connected to the base portion by 21 st arm portions having flexibility,

The 2 nd button is disposed in a2 nd hole formed in the base portion, is connected to the base portion by 2 nd arm portions having flexibility,

The 1 st button and the 2 nd button are separated from each other in a left-right direction orthogonal to the front-back direction and the up-down direction,

The 21 st arm portions extend in the left-right direction so as to be separated from each other as the button is moved from the 1 st to the 2 nd buttons,

The 2 nd arm portions extend in the left-right direction so as to be separated from each other as the button is moved from the 2 nd button toward the 1 st button.

According to this embodiment, the push button is capable of moving in response to bending of the 2 arms, thereby turning on the switch. According to this configuration, compared with a configuration in which the push button and the base portion are connected by only 1 arm, the twisting of the arm portion when the push button is pushed can be suppressed, and further, the positional displacement of the push button with respect to the switch can be suppressed. Accordingly, the push button can more reliably turn on the switch.

Mode B11

The outer surface of the operating portion and the outer surface of the handle body are substantially located in the same plane.

Mode B12

The handle body includes:

an upper connecting portion connecting an upper end portion of the grip portion and the main body case; and

A lower connecting part connecting the lower end of the holding part and the main body casing,

The operation portion is provided at a front end portion of the lower connection portion.

Mode B13

The operation portion includes a flexible sheet that covers the operation panel from outside.

Mode B14

The battery mounting portion is provided at a lower end portion of the lower connection portion.

Mode B15

The controller is accommodated in the handle body.

The above-described embodiments are merely examples, and the impact tools according to aspects B1 to B15 of the present invention are not limited to the hammer drill 1 shown in the examples. For example, non-limiting variations of the following examples can be added. At least 1 of these modifications can be used in combination with the hammer drill 1 described in the embodiment and any of the inventions described in the respective embodiments.

For example, the impact tool according to the present invention may be embodied as an impact tool (for example, an electric hammer (demolition hammer, scraper)) configured to perform only an impact operation. The configuration and/or arrangement of the main body case, the handle body, the motor, and the impact mechanism in the impact tool can be appropriately changed from the examples of the above embodiments. For example, the motor 31 may be configured such that the motor axis MX is orthogonal to the drive axis DX, or may be configured such that the motor axis MX extends parallel to the drive axis DX. The impact mechanism may be a known mechanism using a crankshaft, for example.

The connection method between the main body case and the handle body is not limited to the example of the embodiment described above. For example, the 2 end portions of the handle body may be connected to the main body case via an elastic body so as to be movable only in the front-rear direction with respect to the main body case. The elastic body interposed between the main body case and the handle body may be any of various springs, elastomers, synthetic resin foams, and the like, which are different from those of the examples of the above embodiments. The number and/or arrangement of the elastic bodies can also be changed as appropriate.

The operation unit and the switch according to the present invention are not limited to the operation unit 6 and the switch 7 of the above embodiment. For example, the number and/or arrangement of the switches 7 and the buttons 65 of the corresponding operation unit 6 can be changed as appropriate. The switch may be a mechanical switch such as the switch 7 of the above embodiment, or an electronic switch that electronically opens and closes a circuit using a valve or a semiconductor device. Further, the operation portion and the switch may be integrated, and for example, a membrane switch having contacts integrated with a sheet can be employed.

Claims (10)

1. A reciprocating tool, characterized in that,

The device comprises:

A motor;

a reciprocating mechanism operatively connected to the motor and configured to linearly reciprocate a tool bit along a drive axis defining a front-rear direction of the reciprocating tool bit;

A main body housing that accommodates the motor and the reciprocating mechanism;

A handle body including a grip portion extending in an up-down direction intersecting the drive axis, at a rear of the main body case; and

The elastic body is made of an elastic material,

One of the main body housing and the handle body has a1 st connection portion,

The other of the main body housing and the handle body has a 2 nd connecting portion,

The main body housing and the handle body are connected to each other by the 1 st connecting portion and the 2 nd connecting portion in such a manner as to be relatively movable in the front-rear direction,

The 1 st connection part has an inner space and an opening communicating the inner space with the outside of the 1 st connection part,

The 2 nd connecting portion protrudes at least partially into the internal space through the opening of the 1 st connecting portion and is movable in the front-rear direction with respect to the 1 st connecting portion within the range of the opening,

The elastic body is disposed in the internal space of the 1 st connecting portion, and biases the 1 st connecting portion and the 2 nd connecting portion so that the main body case and the handle body are away from each other in the front-rear direction.

2. The reciprocating tool of claim 1, wherein the reciprocating tool comprises a reciprocating tool body,

The 1 st connecting part is arranged on the handle body,

The 2 nd connection portion is a protrusion provided to the main body case.

3. The reciprocating tool of claim 2, wherein the reciprocating tool comprises a reciprocating tool body,

The 1 st connecting portion is provided at a portion extending forward from an upper end portion of the grip portion.

4. A reciprocating tool as claimed in claim 2 or 3, wherein,

At least a part of the handle body is formed by 2 handle split bodies connected to each other in a left-right direction orthogonal to the front-rear direction and the up-down direction,

The inner space of the 1 st connecting part is formed by the connection of the 2 handle split bodies.

5. The reciprocating tool according to any one of claims 2 to 4, wherein,

At least a part of the main body case is formed by 2 main body split bodies connected to each other in a left-right direction orthogonal to the front-rear direction and the up-down direction,

The 2 nd connecting part is arranged on one of the 2 main body split bodies and connected with the other of the 2 main body split bodies.

6. The reciprocating tool according to any one of claims 2 to 5, wherein,

The elastic body is directly abutted against the rear end of the 2 nd connecting portion in the front-rear direction.

7. The reciprocating tool of claim 6, wherein the reciprocating tool comprises a reciprocating tool body,

The tip of the 2 nd connecting portion is configured to limit the initial position of the handle relative to the main body case by abutting against a part of the 1 st connecting portion.

8. The reciprocating tool according to any one of claims 2 to 7, wherein,

A rear end opening is formed at a rear end portion of the main body case, the rear end opening being opened rearward and communicating the internal space of the main body case with the outside,

The 1 st connecting part extends into the main body shell through the rear end opening,

The rear end of the opening of the 1 st connection part is located forward of the rear end opening of the main body case.

9. The reciprocating tool according to any one of claims 1 to 8, wherein,

The main body housing has a3 rd connection portion,

The handle body is provided with a 4 th connecting part,

The main body housing and the upper end portion of the handle body are connected to each other by the 1 st connecting portion and the 2 nd connecting portion in such a manner as to be relatively movable in the front-rear direction,

The main body case and the lower end portion of the handle body are connected to each other by the 3 rd connecting portion and the 4 th connecting portion so as to be relatively movable about a rotation axis extending in a left-right direction orthogonal to the front-rear direction and the up-down direction.

10. The reciprocating tool of claim 9 wherein the reciprocating tool comprises a reciprocating tool body,

The 1 st connection portion is configured such that a straight line orthogonal to the rotation axis and extending in the up-down direction passes through the 1 st connection portion.