Reciprocating tool

Abstract

To provide improvement related to a vibration control handle structure of a reciprocating tool.SOLUTION: A reciprocating tool includes a motor, a reciprocating mechanism, a main body housing, a handle body including a holding part, and an elastic body. One of the main body housing and the handle body has a first coupling part, and the other has a second coupling part. The main body housing and the handle body are connected with each other so as to be movable relative to each other in an anteroposterior direction through the first coupling part and the second coupling part. The first coupling part has an internal space and an opening which allows communication between the internal space and the outside of the first coupling part. The second coupling part at least partially protrudes into the internal space through the opening of the first coupling part and is movable relative to the first coupling part in the anteroposterior direction within a range of the opening. The elastic body is disposed in the internal space of the first coupling part and biases the first coupling part and the second coupling part such that the main body housing and the handle body are separated away from each other in the anteroposterior direction.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present disclosure relates to a reciprocating tool configured to linearly reciprocate a tool bit. [Background technology]

[0002] A reciprocating tool causes a tool bit to reciprocate linearly along a drive shaft. When the tool bit is driven, a relatively large vibration occurs in the extension direction (front-rear direction) of the drive shaft. Thus, a reciprocating tool having an anti-vibration handle structure for reducing the vibration transmitted to the grip is known. For example, in a hammer drill disclosed in Patent Document 1, an upper end of the handle and a rear end of the main body housing are connected to be relatively movable in the front-rear direction. In addition, an elastic body is interposed between the upper end of the handle and the rear end of the main body housing, and biases the upper end of the handle and the rear end of the main body housing so as to move away from each other. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-40161 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the hammer drill of Patent Document 1, the connecting structure between the handle and the main housing (the oblong hole in the handle and the protrusion provided on the main housing and inserted into the oblong hole) and the elastic body (compression coil spring) are arranged side by side in the front-rear direction. Therefore, a relatively wide area is required in the front-rear direction. Also, for example, if the relative movement distance between the handle and the main housing is increased, the hammer drill will become larger in the front-rear direction.

[0005] In view of the above-mentioned circumstances, one non-limiting object of the present disclosure is to provide an improvement regarding an anti-vibration handle structure for a reciprocating tool. [Means for solving the problem]

[0006] According to one non-limiting aspect of the present disclosure, there is provided a reciprocating tool including a motor, a reciprocating mechanism, a main housing, a handle body, and an elastic body. The reciprocating mechanism is operably coupled to the motor and configured to linearly reciprocate a tool bit along a drive shaft. The drive shaft defines a front-rear direction of the reciprocating tool. The main housing accommodates the motor and the reciprocating mechanism. The handle body includes a grip portion. The grip portion extends in a vertical direction intersecting the drive shaft at the rear of the main housing.

[0007] One of the main body housing and the handle body has a first connecting portion. The other of the main body housing and the handle body has a second connecting portion. The main body housing and the handle body are connected to each other via the first connecting portion and the second connecting portion so as to be relatively movable in the front-rear direction. Note that, in this case, "the main body housing and the handle body are relatively movable in the front-rear direction" means that the main body housing and the handle body are at least partially relatively movable, and the direction of the relative movement includes a front-rear component, and is not limited to a state in which the main body housing and the handle body are relatively movable only in the front-rear direction strictly. The first connecting portion has an internal space and an opening that communicates the internal space with the outside of the first connecting portion. The second connecting portion at least partially protrudes into the internal space through the opening of the first connecting portion. In addition, the second connecting portion is movable in the front-rear direction relative to the first connecting portion within the range of the opening. The elastic body is disposed in the internal space of the first connecting portion and biases the first connecting portion and the second connecting portion so that the main body housing and the handle body move away from each other in the front-rear direction.

[0008] According to this aspect, the elastic body biases the first connecting portion and the second connecting portion so as to move away from each other in the front-rear direction, thereby effectively absorbing the dominant vibration in the front-rear direction that occurs with the reciprocating drive of the tool bit. The main body housing and the handle body are connected to each other by the first connecting portion and the second connecting portion that protrudes into the internal space through the opening of the first connecting portion so as to be relatively movable in the front-rear direction, and the elastic body is disposed in the internal space of the first connecting portion. That is, the first connecting portion not only functions to connect the main body housing and the handle body in cooperation with the second connecting portion, but also exhibits a function to accommodate the elastic body. Therefore, the reciprocating tool can be made smaller by storing the connecting structure between the handle body and the main body housing and the elastic body in a region smaller in the front-rear direction than the above-mentioned known structure. Alternatively, it is possible to increase the distance over which the handle body and the main body housing can move relatively without increasing the size of the reciprocating tool in the front-rear direction. [Brief description of the drawings]

[0009] [Figure 1] FIG. [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] FIG. 2 is a partially enlarged view of FIG. 1 (however, the flexible sheet of the operation portion is not shown). [Diagram 5] FIG. 2 is a rear view of the hammer drill (however, the flexible sheet of the operating portion is not shown). [Figure 6] FIG. 3 is a cross-sectional view taken along line VI-VI in FIG. [Figure 7] 3 is a partially enlarged view of FIG. 2, showing the handle body in an initial position. [Figure 8] 8 is a cross-sectional view taken along line VIII-VIII in FIG. 7. [Figure 9] 8 is a cross-sectional view corresponding to FIG. 7, showing the handle body at its frontmost position. [Figure 10] FIG. 3 is a partially enlarged view of FIG. [Figure 11] 11 is a cross-sectional view taken along line XI-XI in FIG. [Figure 12] FIG. [Figure 13] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] In one non-limiting embodiment of the present disclosure, the first connecting portion may be provided on the handle body. The second connecting portion may be a protrusion provided on the main body housing. According to this embodiment, the second connecting portion, which is a protrusion, is provided on the main body housing that accommodates the motor and the drive mechanism, and the first connecting portion having an internal space and an opening is provided on the handle body. Therefore, an assembler can easily align the opening of the first connecting portion of the handle body with the second connecting portion (protrusion) of the main body housing and insert it. This improves the ease of assembly.

[0011] In addition to or instead of the above embodiment, the first connecting portion may be provided on a portion extending forward from the upper end of the grip portion. A typical handle body includes a portion extending forward from the upper end of the grip portion to connect the grip portion and the main body housing. Therefore, according to this embodiment, by utilizing a portion that the handle body originally has, the first connecting portion can be provided without making the handle body complicated or large.

[0012] In addition to or instead of the above embodiment, at least a portion of the handle body may be formed by two handle halves connected to each other in the left-right direction perpendicular to the front-rear direction and the up-down direction. The internal space of the first connecting part of the handle body may be formed by connecting the two handle halves. According to this embodiment, the first connecting part having an internal space can be easily formed.

[0013] In addition to or instead of the above embodiment, at least a portion of the main body housing may be formed by two main body halves connected to each other in a left-right direction perpendicular to the front-rear direction and the up-down direction. The second connecting portion of the main body housing may be provided on one of the two main body halves and connected to the other of the two main body halves. According to this embodiment, a part of the connecting portion between the two halves of the main body housing can be used as the second connecting portion, so that the structure of the main body housing can be simplified.

[0014] In addition to or instead of the above embodiment, the elastic body may be in direct contact with the rear end of the second connecting portion of the main body housing in the front-rear direction. In other words, the second connecting portion of the main body housing 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 on the main body housing, the structure of the main body housing can be simplified.

[0015] In addition to or instead of the above embodiment, the front end of the second connecting portion of the main body housing may be configured to abut against a part of the first connecting portion to determine the initial position of the handle body relative to the main body housing. In other words, the rear end and the front end of the second connecting portion may be configured as a spring receiving portion and a positioning portion for the initial position of the handle body, respectively. According to this embodiment, there is no need to provide a separate positioning portion on the main body housing, so the structure of the main body housing can be simplified.

[0016] In addition to or instead of the above embodiment, a rear end opening may be formed at the rear end of the main body housing, opening rearward and communicating the internal space of the main body housing with the outside. The first connecting part may extend into the main body housing through the rear end opening. The rear end of the opening of the first connecting part may be forward of the rear end opening of the main body housing. According to this embodiment, the opening of the first connecting part is disposed inside the main body housing, so that it is possible to reduce the possibility that dust will enter the internal space through the opening of the first connecting part, leading to malfunction of the elastic body.

[0017] In addition to or instead of the above embodiment, the main body housing may have a third connecting portion. The handle body may have a fourth connecting portion. The main body housing and the upper end of the handle body may be connected to each other via the first connecting portion and the second connecting portion so as to be relatively movable in the front-rear direction. The main body housing and the lower end of the handle body may be connected to each other via the third connecting portion and the fourth connecting portion so as to be relatively movable around a rotation axis extending in the left-right direction perpendicular to the front-rear direction and the up-down direction. According to this embodiment, the largest vibration in the front-rear direction caused by the reciprocating drive of the tool bit can be absorbed by the elastic body while responding to the vibration in the front-rear direction and the vibration in the up-down direction generated in the main body housing due to the rotation of the handle body relative to the main body housing.

[0018] In addition to or instead of the above embodiment, the first connecting portion may be disposed so that a straight line extending in the vertical direction perpendicular to the rotation axis passes through the first connecting portion. In other words, the first connecting portion may be disposed directly above the rotation axis. According to this embodiment, the direction in which the elastic body exerts a biasing force is approximately the same as the extension direction of a tangent to a circle whose center is the rotation axis and whose radius is a line segment connecting the part of the first connecting portion directly above the rotation axis and the rotation axis. Therefore, since excessive stress is not applied to the elastic body, the life of the elastic body can be extended.

[0019] A hammer drill 1 according to a representative and non-limiting embodiment of the present disclosure will be described below with reference to the drawings. The hammer drill 1 is a power tool capable of performing an impact operation. The impact operation is an operation in which a removably held tip tool 91 is struck and linearly reciprocated along a drive shaft DX. In other words, the hammer drill 1 is an example of an impact tool and also an example of a reciprocating tool. The hammer drill 1 can also perform a rotation operation simultaneously with the impact operation or independently of the impact operation. The rotation operation is an operation in which the tip tool 91 is rotationally driven around the drive shaft DX.

[0020] First, there will be described a schematic configuration of the hammer drill 1. As shown in Figures 1 and 2, the outer shell of the hammer drill 1 is formed by a main body housing 10 and a handle body 2 connected to the main body housing 10.

[0021] The main body housing 10 is a hollow body also referred to as a tool body or an outer shell. The main body housing 10 of the present embodiment includes a first housing portion 11 and a second housing portion 15.

[0022] As shown in Fig. 2, the first housing portion 11 mainly accommodates the spindle 40, which is a tool tool holding member, and the drive mechanism 4 for the tool tool 91. The spindle 40 is a long cylindrical member. One end of the spindle 40 in the longitudinal direction is configured as a tool holder 401 that removably holds the tool tool 91. The longitudinal axis of the tool holder 401 (spindle 40) defines the drive axis DX of the tool tool 91.

[0023] The first housing part 11 extends along the drive axis DX. One end of the first housing part 11 in the extending direction of the drive axis DX is formed in a cylindrical shape, and the tool holder 401 is accommodated in this part (also called a barrel part 111). The remaining part of the first housing part 11 is cylindrical and larger than the barrel part 111.

[0024] The second housing portion 15 is a portion that mainly houses the motor 31. The second housing portion 15 is connected to an end portion of the first housing portion 11 opposite the barrel portion 111 in the extending direction of the drive shaft DX, and extends in a direction intersecting (more specifically, roughly perpendicular to) the drive shaft DX. With this configuration, the main housing 10 including the first housing portion 11 and the second housing portion 15 is formed into an L-shape as a whole.

[0025] The handle body 2 is a U-shaped hollow member as a whole, and both ends thereof are connected to the main housing 10 (second housing portion 15). The handle body 2 includes a grip portion 21 that is gripped by a user. The grip portion 21 extends in a direction intersecting the drive axis DX (more specifically, in a direction generally perpendicular to the drive axis DX). The grip portion 21 is provided with a trigger 211 that is pressed by the user. A main switch 213 is housed within the grip portion 21. When the main switch 213 is turned on in response to pressing of the trigger 211, the motor 31 starts to be driven, and the drive mechanism 4 drives the tip tool 91.

[0026] The detailed configuration of the hammer drill 1 will be described below. For convenience, in the following description, the extending direction of the drive shaft 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 into which the tool tip 91 is inserted) is defined as the front side of the hammer drill 1, and the opposite side is defined as the rear side. In addition, a direction perpendicular to the drive shaft DX and roughly corresponding to the extending direction of the second housing part 15 (which is also the extending direction of the grip part 21) is defined as the up-down direction of the hammer drill 1. In the up-down direction, the direction toward the first housing part 11 is defined as the upward direction, and the direction away from the first housing part 11 is defined as the downward direction. Furthermore, a direction perpendicular to the front-rear direction and the up-down direction is defined as the left-right direction.

[0027] First, there will be described a detailed configuration of the main housing 10. As described above, the main housing 10 includes the first housing portion 11 and the second housing portion 15.

[0028] 1 and 2, the first housing portion 11 of the main body housing 10 is formed into a cylindrical shape as a whole. An inner housing 17 is fitted into an opening 110 at the rear end of the first housing portion 11 to close the opening 110. A spindle 40 and a drive mechanism 4 are disposed in the space defined by the first housing portion 11 and the inner housing 17.

[0029] The second housing portion 15 of the main housing 10 is a hollow body that is connected to the rear end of the first housing portion 11 and extends in the up-down direction. The upper half of the second housing portion 15 is connected to the rear end of the first housing portion 11 by screws. In this embodiment, the second housing portion 15 is formed by connecting two half bodies 15L and 15R, which are divided in the left-right direction, to each other by screws. An inner housing 17 is disposed inside the upper half of the second housing portion 15 and is fitted into the rear end of the first housing portion 11. A motor 31 is accommodated in the lower half of the second housing portion 15.

[0030] Next, a detailed configuration of the handle body 2 will be described. As shown in Fig. 1 to Fig. 3, the handle body 2 includes a gripping portion 21, an upper extension portion 23 connected to the upper end of the gripping portion 21, and a lower extension portion 25 connected to the lower end of the gripping portion 21. Note that the handle body 2 of this embodiment is formed by splitting it in the left-right direction into two half bodies 2L, 2R and connecting them to each other with screws.

[0031] The grip portion 21 is a cylindrical portion that extends vertically at the rear of the main housing 10 and is formed with a thickness that allows the user to grip it.

[0032] The upper extension portion 23 extends upward and forward (toward the main housing 10) of the grip portion 21. The front end portion of the upper extension portion 23 is elastically connected to the upper rear end portion of the main housing 10 (second housing portion 15). The elastic connection structure between the upper extension portion 23 and the main housing 10 will be described in detail later.

[0033] The lower extension portion 25 extends downward and forward from the grip portion 21. The lower extension portion 25 includes a controller accommodating portion 26, a rotational coupling portion 27, and an opposing portion .

[0034] The controller accommodating 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 accommodating portion 26 protrudes forward beyond the grip portion 21. The controller accommodating portion 26 defines an accommodation space for the controller 30 below the grip portion 21.

[0035] A battery mounting section 261 is provided at the lower end of the controller accommodating section 26 (below the controller 30). The battery mounting section 261 is configured to removably receive a rechargeable battery (also called a battery pack) 93. Since this is a well-known configuration, detailed illustrations and descriptions are omitted, but the battery mounting section 261 includes a pair of rails that can be physically engaged with a pair of grooves in the battery 93 and a terminal that can be electrically connected to the terminals of the battery 93. The lower end of the second housing section 15 protrudes downward beyond the lower end of the controller accommodating section 26. When the battery 93 is mounted in the battery mounting section 261, the front surface of the battery 93 faces the rear surface of the lower end of the second housing section 15.

[0036] In this embodiment, by providing the battery mounting portion 261 on the handle body 2, chattering when the battery 93 is mounted can be reduced compared to when the battery mounting portion 261 is provided on the main housing 10. Also, since the mass of the battery 93 is added to the mass of the handle body 2, it is possible to achieve even lower vibration of the handle body 2 when the battery 93 is mounted.

[0037] The rotational coupling part 27 is a part that protrudes obliquely downward from the front end part of the controller accommodating part 26. The rotational coupling part 27 is coupled to the main body housing 10 so as to be rotatable about a rotational axis PX that extends in the left-right direction (i.e., in a direction perpendicular to the drive axis DX). The coupling structure between the rotational coupling part 27 and the main body housing 10 will be described in detail later.

[0038] As shown in Figs. 2 to 5, the facing portion 28 is a portion that protrudes 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 so that a projection area of ​​the grip portion 21 from the rear overlaps with a part of the facing portion 28. Alternatively, it may be said that the facing portion 28 is configured so that a straight line extending in the front-rear direction passes through the grip portion 21 and the facing portion 28. In this embodiment, the grip portion 21 is a relatively thin cylindrical shape so that the user can easily grip it, whereas the width in the left-right direction of the facing portion 28 is larger than the outer diameter (width in the left-right direction) of the handle body 2. Therefore, the facing portion 28 protrudes leftward and rightward from the projection area of ​​the grip portion 21 from the rear. In other words, when the hammer drill 1 is viewed from the rear, a part of the facing portion 28 is to the left of the grip portion 21, and another part of the facing portion 28 is to the right of the grip portion 21.

[0039] Moreover, the outer surface of the rear wall of the facing portion 28 (i.e., the rear surface of the rear wall portion facing the grip portion 21; hereinafter, referred to as the facing surface 280) is inclined forward as it extends upward. In other words, the facing surface 280 extends obliquely upward and forward from the front end of the upper surface of the controller housing portion 26.

[0040] The elastic connection structure between the main housing 10 and the handle body 2 will now be described in detail.

[0041] As described above, in this embodiment, the rotational connection portion 27 of the lower extension portion 25 of the handle body 2 is connected to the main body housing 10 so as to be rotatable relative to the main body housing 10. On the other hand, the upper extension portion 23 is connected to the main body housing 10 so as to be movable in the front-rear direction, and is biased by the elastic body 230 in a direction away from the main body housing 10 (i.e., backward).

[0042] First, the connection structure between the rotational connection portion 27 and the main housing 10 will be described.

[0043] As shown in Fig. 3, the rotational coupling part 27 includes a coupling shaft 271 extending in the left-right direction. Meanwhile, as shown in Fig. 2, an opening 151 that is open to the rear is provided at the lower rear end part of the second housing part 15 of the main body housing 10. The rotational coupling part 27 is inserted into the lower end part of the second housing part 15 through the opening 151. Of the lower rear end part of the second housing part 15, the part below the opening 151 is configured as a shaft support part 152 that rotatably supports both ends of the coupling shaft 271.

[0044] As shown in FIG. 6, the shaft support portion 152 has two recesses 153 formed in the left side wall portion (half body 15L) and the right side wall portion (half body 15R) of the second housing portion 15. Both ends of the connecting shaft 271 are disposed in these recesses 153, respectively, and are supported rotatably around the rotation axis PX. Conversely to this example, two recesses may be formed in the left side wall portion and the right side wall portion of the rotating connector 27, respectively, and two protrusions may protrude into the recesses from the left side wall portion and the right side wall portion of the main housing 10, respectively, to rotatably support the rotating connector 27. Alternatively, the rotating connector 27 and the main housing 10 may be connected to each other by a separate shaft so as to be rotatable relative to each other.

[0045] In this embodiment, annular elastic bodies 270 (O-rings) are attached to the outer periphery of both ends of the connecting shaft 271, and the elastic bodies 270 are fitted into the recesses 153. That is, the connecting shaft 271 is connected to the second housing portion 15 via the two elastic bodies 270. With this configuration, the handle body 2 is not only rotatable around the rotation axis PX extending in the left-right direction relative to the main body housing 10, but also movable in any direction intersecting the rotation axis PX. This makes it possible to reduce vibration transmission from the shaft support portion 152 to the connecting shaft 271. However, the elastic bodies 270 may be omitted, and the connecting shaft 271 may be directly supported by the shaft support portion 152 so as to be rotatable.

[0046] Next, the connection structure between the upper extension portion 23 and the main housing 10 will be described.

[0047] As shown in Fig. 7, an opening 113 that is open to the rear is provided at the upper rear end of second housing portion 15 of main body housing 10. A front half of upper extension portion 23 extends forward beyond grip portion 21 and is partially inserted into the upper rear end of main body housing 10 through opening 113, and is connected to main body housing 10. Hereinafter, the front half of upper extension portion 23 will be referred to as upper connecting portion 24. Furthermore, the portion of the upper rear end of second housing portion 15 that is in front of opening 113 and that accommodates upper connecting portion 24 will be referred to as handle accommodating portion 12.

[0048] As shown in Figs. 3, 7 and 8, the upper connecting part 24 is a hollow body elongated in the front-rear direction as a whole, and defines an internal space 240 elongated in the front-rear direction. An opening 241 that communicates the internal space 240 of the upper connecting part 24 with the outside is formed in the front end of each of the left side wall part (half body 2L) and the right side wall part (half body 2R) of the upper connecting part 24. The two openings 241 on the left and right 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. With this configuration, a through hole 245 that penetrates the upper connecting part 24 in the left-right direction is formed in the front half of the upper connecting part 24.

[0049] With the above configuration, the left and right sides of the front half of the internal space 240 are open (connected to the outside) by the openings 241, and the remaining part is an enclosed (closed) space. In this embodiment, the handle body 2 is formed by connecting the left and right half bodies 2L, 2R to each other. Therefore, by connecting the half bodies 2L, 2R with a simple configuration, the internal space 240 with such a configuration can be easily formed in the handle body 2.

[0050] 7 and 8, a beam portion 121 is provided inside the handle accommodating portion 12. More specifically, the beam portion 121 extends substantially in the left-right direction between the left side wall portion and the right side wall portion of the handle accommodating portion 12. The beam portion 121 is formed by portions of the left half body 15L and the right half body 15R that are connected to each other by screws 125.

[0051] Specifically, the beam portion 121 is formed by connecting a connecting protrusion 122 provided integrally with the left half body 15L and a receiving portion 123 provided integrally with the right half body 15R to each other. The connecting protrusion 122 protrudes rightward from the inner surface of the left side wall of the half body 15L. The receiving portion 123 includes a recess formed on the inner surface of the right side wall of the half body 15R. The connecting protrusion 122 is inserted into a through hole 245 (left opening 241, internal space 240, right opening 241) of the upper connecting portion 24, and the tip of the connecting protrusion 122 is fitted into the receiving portion 123. The screw 125 is screwed into a screw hole formed in the connecting 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 connecting protrusion 122 in the front-rear direction. With this configuration, the upper connecting portion 24 and the handle accommodating portion 12 are connected to each other so as to be capable of relative movement within a range in which the connecting protrusion 122 can move through the opening 241 .

[0052] An elastic body 230 is disposed in the internal space 240 of the upper connecting part 24. In this embodiment, a compression coil spring is used for the elastic body 230. The elastic body 230 is disposed between the upper connecting part 24 and the connecting protrusion 122 of the handle accommodating part 12 so as to exert a biasing force substantially parallel to the drive shaft DX (i.e., in the front-rear direction).

[0053] More specifically, the rear half of the upper connecting portion 24 (the portion rearward of the opening 241) is configured as a spring support portion 247 into which the elastic body 230 can be fitted. A part of the elastic body 230, including the rear end, is inserted into and supported by the spring support portion 247 (the rear half of the internal space 240). The rear end of the elastic body 230 abuts against a surface 243 that defines the rear end of the internal space 240. A part of the elastic body 230, including the front end, is disposed in the front half of the internal space 240 (the portion that communicates with the outside through the opening 241 / through hole 245). The front end of the elastic body 230 abuts against the rear end of the connecting protrusion 122 that is inserted through the through hole 245. That is, the connecting protrusion 122 also functions as a spring receiving portion (spring seat) that receives the front end of the elastic body 230.

[0054] The elastic body 230 biases the upper connecting portion 24 and the connecting protrusion 122 (beam portion 121) in the front-rear direction so that the handle body 2 and the main body housing 10 move away from each other. That is, the elastic body 230 biases the upper end of the handle body 2 backward with respect to the main body housing 10. In an initial state in which no external force is applied against the biasing force of the elastic body 230, the front end of the connecting protrusion 122 abuts against a part of the upper connecting portion 24 (more specifically, the surface 244 that defines the front end of the opening 241), thereby preventing the upper end of the handle body 2 from moving further backward. That is, the connecting protrusion 122 also functions as a positioning portion that defines the initial position of the handle body 2 with respect to the main body housing 10.

[0055] 7, in this embodiment, when the handle body 2 is in the initial position (i.e., when it is in the rearmost position relative to the main body housing 10), the rear end 242 of the opening 241 of the upper connecting part 24 is located forward of the opening 113 of the main body housing 10. In other words, the entire opening 241 is always located inside the main body housing 10. With this arrangement, it is possible to reduce the possibility that dust will enter the internal space 240 from the opening 241, causing malfunction of the elastic body 230.

[0056] On the other hand, when an external force is applied to move the upper end of the handle body 2 forward, the handle body 2 rotates around the rotation axis PX relative to the main body housing 10, and as shown in Fig. 9, the upper end of the handle body 2 moves generally forward against the biasing force of the elastic body 230. More specifically, the connecting protrusion 122 moves rearward within the opening 241 while compressing the elastic body 230 (compression coil spring). Note that in this embodiment, as the handle body 2 rotates, the upper connecting portion 24 moves slightly diagonally downward and forward relative to the main body housing 10. Therefore, the vertical dimensions of the opening 241 and the connecting protrusion 122 are set so that the connecting protrusion 122 does not interfere with the upper connecting portion 24 at this time.

[0057] In this manner, the handle body 2 and the main body housing 10 move relative to each other while the biasing force of the elastic body 230 is acting, thereby reducing vibration transmitted from the main body housing 10 to the handle body 2. Ribs 127 are provided on the inner surfaces of the left and right walls of the handle accommodating portion 12. The tips of the ribs 127 are in substantial contact with the outer surfaces of the left and right walls of the upper connecting portion 24. The ribs 127 prevent the handle body 2 from tilting left and right with respect to the main body housing 10 when the handle body 2 and the main body housing 10 move relative to each other.

[0058] As shown in FIG. 2, in this embodiment, the upper connecting portion 24 (specifically, the elastic body 230) is disposed directly above the rotation axis PX. In other words, a straight line L perpendicular to the rotation axis PX and extending in the vertical direction passes through the upper connecting portion 24 (specifically, the elastic body 230). The tangent of a circle having a radius of a line segment connecting the intersection point of the straight line L and the major axis of the elastic body 230 (compression coil spring) to the rotation axis PX and centered on the rotation axis PX substantially coincides with the major axis of the elastic body 230 (compression coil spring) (i.e., the direction in which the elastic body 230 exerts a biasing force). This reduces the possibility that excessive stress is applied to the elastic body 230 when the handle body 2 is rotated, and the life of the elastic body 230 can be extended.

[0059] As described above, in this embodiment, the rotational coupling part 27 extends downward from the controller housing part 26 in the up-down direction, and therefore the rotational axis PX is located below the battery mounting part 261. This ensures that the distance between the elastic body 230 and the rotational 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 coupling part 24 can be made to approach a translational movement in the front-rear direction.

[0060] 7 and 9, the upper extending portion 23 of this embodiment includes a contact portion 235 extending downward from the front end portion of the upper connecting portion 24. At the rear end portion of the inner housing 17, just forward of the contact portion 235, a contact portion 175 is provided.

[0061] The abutment portion 175 abuts against the abutment portion 235 of the handle body 2 from the front, thereby preventing the upper end of the handle body 2 from moving further forward. That is, the abutment portion 175 determines the forwardmost position of the handle body 2 relative to the main body housing 10. In other words, the abutment portion 175 determines the movement limit of the handle body 2 relative to the main body housing 10, and further the upper limit of the deformation amount of the elastic body 230 (the maximum compression amount of the compression coil spring). This prevents an excessive load from being applied to the elastic body 230, and can extend the life of the elastic body 230. In addition, the abutment portion 175 of this embodiment is formed of an elastic body (e.g., elastomer, synthetic resin foam). Therefore, it is possible to reduce the impact when the abutment portion 235 collides with the abutment portion 175, and also to suppress wear of the abutment portion 235.

[0062] As described above, in this embodiment, the handle body 2 and the main body housing 10 are connected to each other so as to be movable relative to each other in the front-rear direction by the upper connecting part 24 and the connecting protrusion 122 protruding into the internal space 240 through the opening 241 of the upper connecting part 24. The elastic body 230 is disposed behind the connecting protrusion 122 in the internal space 240 of the upper connecting part 24. That is, the upper connecting part 24 not only functions to connect the handle body 2 and the main body housing 10 in cooperation with the connecting protrusion 122, but also functions to accommodate the elastic body 230. Therefore, it is possible to accommodate the connecting structure between the handle body 2 and the main body housing 10 and the elastic body 230 in a relatively small area in the front-rear direction. This allows the hammer drill 1 to be made smaller in the front-rear direction. Alternatively, it is possible to increase the distance over which the handle body 2 and the main body housing 10 can move relative to each other without increasing the size of the hammer drill 1 in the front-rear direction.

[0063] In this embodiment, a connecting protrusion 122 protruding in the left-right direction is provided on one (the left 15L) of the two left and right half bodies 15L, 15R of the second housing portion 15 of the main body housing 10, and an opening 241 into which the connecting protrusion 122 is inserted is provided on the handle body 2. Therefore, an assembly worker can place the half body 15L on a workbench with the connecting protrusion 122 oriented so that it protrudes upward, align the assembled handle body 2 with the connecting protrusion 122 from above, and easily insert the connecting protrusion 122 into the internal space 240 from the left opening 241.

[0064] Furthermore, in this embodiment, the beam portion 121, which is the connecting portion between the half bodies 15L and 15R of the second housing portion 15, is used for connecting with the upper connecting portion 24, so there is no need to provide a connecting portion with the upper connecting portion 24 separately on the main body housing 10. This makes it possible to simplify the structure of the main body housing 10. Also, as described above, the assembly worker can place the handle body 2 on the left half body 15L, and then place the right half body 15R thereon, and easily connect the connecting protrusion 122 and the receiving portion 123 with the screw 125.

[0065] The elements (mechanisms) contained in main body housing 10 will be described below.

[0066] As shown in Fig. 2, the motor 31 is accommodated in the lower half of the second housing portion 15. The motor 31 of this embodiment is a brushless motor, and includes a motor body 310 including a stator and a rotor, and a motor shaft 315. The motor shaft 315 is a shaft that can rotate integrally with the rotor about a motor axis MX and protrudes from the rotor. In this embodiment, the motor 31 is disposed such that the motor axis MX extends slightly obliquely with respect to the up-down direction of the hammer drill 1 and intersects with the drive shaft DX.

[0067] The spindle 40 of this embodiment is a long stepped cylindrical member, and is supported in the upper half of the first housing portion 11 so as to extend in the front-rear direction. The spindle 40 is supported rotatably about the drive axis DX. The front half of the spindle 40 constitutes a tool holder 401. The tool holder 401 is configured to removably hold the tool tip 91 with its major axis coinciding with the drive axis DX. The tool tip 91 is held in a state in which axial movement relative to the tool holder 401 is permitted and rotation about the axis is restricted.

[0068] The drive mechanism 4 is operably connected to the motor 31 (motor shaft 315) and configured to drive the tool tip 91 by the power of the motor 31. The drive mechanism 4 of this embodiment includes an impact mechanism 41 for impact operation and a rotation transmission mechanism 46 for rotation operation. Both the impact mechanism 41 and the rotation transmission mechanism 46 are well-known mechanisms, and therefore will be briefly described below.

[0069] The impact mechanism 41 includes a motion conversion mechanism 42 and an impact element 44. The motion conversion mechanism 42 is operably connected to the motor shaft 315 and is configured to convert the rotational motion of the motor shaft 315 into linear motion along the drive axis DX for driving the tool tip 91. In this embodiment, a well-known mechanism using a swinging member 43, also called a swash bearing or a wobble bearing, is adopted for the motion conversion mechanism 42. The impact element 44 is configured to move linearly along the drive axis DX to apply an impact force to the tool tip 91, thereby driving the tool tip 91 linearly and reciprocating the tool tip 91. The rotation transmission mechanism 46 is operably connected to the motor shaft 315 and is configured to transmit the rotation of the motor shaft 315 to the tool holder 401 (spindle 40). A reduction gear mechanism is typically adopted for the rotation transmission mechanism 46.

[0070] Although detailed description and illustration are omitted because this is a well-known configuration, the hammer drill 1 has a plurality of operation modes and is provided with a mode switching mechanism for switching between the operation modes. The mode switching mechanism switches the impact mechanism 41 to an operable state only when an operation mode in which an impact operation is performed is selected. Moreover, the mode switching mechanism switches the rotation transmission mechanism 46 to an operable state only when an operation mode in which a rotation operation is performed is selected.

[0071] The elements (mechanisms) arranged in the handle body 2 will be described below.

[0072] As described above, the trigger 211 is provided on the grip portion 21, and the main switch 213 is housed inside the grip portion 21. The main switch 213 is normally off, and is turned on in response to pressing of the trigger 211. The main switch 213 is electrically connected to the controller 30, which will be described later.

[0073] A controller 30 is accommodated inside 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 a main switch 213, and a switch 7 and an alarm portion 8 (see FIG. 12) described below. In this embodiment, the controller 30 is accommodated in the handle body 2 and is thereby protected from vibration.

[0074] As shown in Fig. 1, the facing part 28 is provided with an operating part 6 which can be manually operated by a user, and a notification part 8 which is configured to notify information regarding the state of the hammer drill 1. Also, as shown in Fig. 10, the facing part 28 houses a switch 7 which is configured to operate (be switched on and off) in response to manual operation of the operating part 6.

[0075] The switch 7 will now be described.

[0076] As shown in Figs. 10 to 12, in this embodiment, two switches 7 are used to output a signal for setting the rotation speed of the motor 31. More specifically, one of the two switches 7 is a switch for changing the rotation speed of the motor 31 to a speed higher than the currently set rotation speed, and the other is a switch for changing the rotation speed of the motor 31 to a speed lower than the currently set rotation speed. In the following description, when the two switches 7 are collectively referred to or when referring to either one without specifying, they are simply referred to as switches 7. When referring to the switch for changing the rotation speed of the motor 31 to a high speed, the switch is referred to as a first switch 71, and when referring to the switch for changing the rotation speed of the motor 31 to a low speed, the switch is referred to as a second switch 72.

[0077] The two switches 7 in this embodiment are both configured as push switches having a push button 70. More specifically, the switch 7 is configured as a push button type momentary switch (a so-called tactile switch) that is normally kept off and turned on only while being pressed. The switch 7 is configured to output a predetermined digital signal to the controller 30 (see FIG. 2) in response to being turned on.

[0078] In this embodiment, the maximum rotation speed of the motor 31 can be switched in stages among four grades, from grade 1 to grade 4. In response to receiving a signal from the first switch 71, the controller 30 changes the maximum rotation speed of the motor 31 to a rotation speed of one grade higher. Similarly, in response to receiving a signal from the second switch 72, the controller 30 changes the maximum rotation speed of the motor 31 to a rotation speed of one grade lower. The controller 30 controls the rotation speed of the motor 31 based on the set maximum rotation speed and the operation amount (pressing amount) of the trigger 211.

[0079] In this embodiment, the two switches 7 are mounted on a common circuit board 50 and connected to the controller 30 via an electric wire connected to the circuit board 50. The circuit board 50 has an elongated shape 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 first switch 71 is disposed on the right end of the circuit board 50, and the second switch 72 is disposed on the left end of the circuit board 50, spaced apart from the first switch 71.

[0080] The notification unit 8 will now be described.

[0081] The notification unit 8 of this embodiment is configured to notify information related to the currently set maximum rotation speed of the motor 31 and information related to the currently set operation mode, as information related to the state of the hammer drill 1. More specifically, as shown in Fig. 12, the notification unit 8 includes four LEDs 81 for notifying information related to the maximum rotation speed of the motor 31, and an LED 83 for notifying information related to the operation mode. All of the LEDs 81, 83 are mounted on the circuit board 50, which is also shared with the switch 7, and are connected to the controller 30 via electric wires connected to the circuit board 50.

[0082] The four LEDs 81 are aligned in a straight line between the first switch 71 and the second switch 72 in the left-right direction. The four LEDs 81 correspond, from the left, to four grades of the maximum rotation speed of the motor 31. The controller 30 is configured to light up one of the four LEDs 81 according to the grade of the rotation speed set as described above.

[0083] The LED 83 is disposed between the second left switch 72 and the leftmost LED 81. The controller 30 is configured to illuminate the LED 83 when a particular operating mode is selected.

[0084] The operation unit 6 will now be described.

[0085] The operation unit 6 is configured to cover the switch 7 and allow a user to press the push button 70 of the switch 7 from the outside. More specifically, as shown in Figs. 1 and 10, the operation unit 6 of this embodiment is provided continuous with the outer surface (opposing surface 280) of the opposing part 28. More specifically, the outer surface 600 of the operation unit 6 and the opposing surface 280 are substantially in the same plane. In other words, there is substantially no step between the outer surface 600 of the operation unit 6 and the opposing surface 280. Note that the "surface" is not limited to a flat surface, and may be a surface that is at least partially curved, and a slight step is permissible.

[0086] As shown in FIG. 10, the operation unit 6 of this embodiment includes an operation panel 60 having buttons 65 that are displaceable in response to a user's pressing operation, and a flexible sheet 67 that covers the operation panel 60 from the outside.

[0087] As shown in FIGS. 10 to 13, the operation panel 60 includes a base portion 61 and two buttons 65 supported by the base portion 61. As shown in FIG.

[0088] The base portion 61 is formed into a generally rectangular flat plate overall. The operation panel 60 is disposed so 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 described above is disposed so that the surface on which the switch 7 and the LEDs 81, 83 of the notification portion 8 are mounted faces one surface of the base portion 61, and is fixed to the base portion 61.

[0089] More specifically, two projections 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 screws 51 in a state where the surface on which the switch 7 and the LEDs 81, 83 of the notification unit 8 are mounted is in contact with the tip surface of the projection 613. As a result, the circuit board 50, the switch 7, the notification unit 8, and the operation unit 6 are integrated to form a single unit (assembly) (hereinafter also referred to as the switch unit 5). The base portion 61 is disposed approximately parallel to the circuit board 50 and is spaced apart from the switch 7 and the LEDs 81, 83 of the notification unit 8. In the following description, one surface of the base portion 61 facing the circuit board 50 is referred to as the inner surface 611, and the other surface (the surface opposite to the circuit board 50) is referred to as the outer surface 612.

[0090] Each button 65 is disposed in a hole 62 formed in the base portion 61, and is connected to the base portion 61 by two arm portions 66. More specifically, two holes 62 are formed at the left end and the right end of the base portion 61, respectively. Each hole 62 penetrates the base portion 61 in the plate thickness direction. The two buttons 65 are disposed in the center of these two holes 62. In this embodiment, both the holes 62 and the buttons 65 are circular, and the holes 62 and the buttons 65 are disposed concentrically. The positions of the two holes 62 and the buttons 65 are set so that the centers of the two buttons 65 face the push buttons 70 of the two switches 7 mounted on the circuit board 50, respectively. In an initial state in which no external force is applied to the buttons 65, the buttons 65 are separated from the push buttons 70 of the switches 7.

[0091] Each of the two arms 66 connecting each button 65 to the base portion 61 is formed in a rod shape. Each arm 66 extends radially outward from the outer edge of the button 65 within the hole 62 of the base portion 61, and is connected to the base portion 61. In this embodiment, the base portion 61, the buttons 65, and the arms 66 are integrally molded from synthetic resin. In other words, the operation panel 60 is an integrally molded part made of synthetic resin.

[0092] Each arm 66 can bend (elastically deform) relative to the base 61 in a direction in which the base 61 faces the circuit board 50 (a direction substantially perpendicular to the inner surface 611). In addition, a protrusion protruding radially outward is provided at two locations of the hole 62. The arm 66 extends from the button 65 into this protrusion and is connected to the base 61. This ensures the length of the arm 66 while minimizing the gap between the button 65 and the base 61, making it easy to bend the arm 66. When the arm 66 is bent (elastically deformed) in response to the button 65 being pressed, the button 65 moves in a direction approaching the circuit board 50 and presses the push button 70 of the switch 7 to turn on the switch 7.

[0093] In addition, the angle α formed by the two arm parts 66 corresponding to each button 65 is preferably within a range of approximately 60 degrees to 90 degrees. This is because the larger the angle α is than 90 degrees, the lower the operability of the button 65 tends to be, and the smaller the angle α is than 60 degrees, the more likely the arm part 66 is to twist when the button 65 is pressed. In addition, the twist of the arm part 66 causes a deviation in the moving direction of the center part of the button 65 with respect to the straight line connecting the button 65 and the push button 70 of the switch 7, which may cause the button 65 to be unable to properly turn on the switch 7 (cause of malfunction). From the viewpoint of the operability of the button 65 and the push button 70 of the switch 7 and suppression of twisting, it is considered that the angle α is optimal to be 90 degrees. For this reason, in this embodiment, the angle α formed by the two arm parts 66 is substantially set to 90 degrees.

[0094] In the following description, when the two buttons 65 are referred to collectively or when referring to either one, they are simply referred to as buttons 65. When the right button of the two buttons 65 is referred to specifically, it is referred to as a first button 651, and when the left button is referred to specifically, it is referred to as a second button 652. When the arm portion 66 corresponding to the first button 651 and the arm portion 66 corresponding to the second button 652 are referred to collectively or when referring to either one, they are simply referred to as arm portion 66. When the two arm portions of the arm portion 66 corresponding to the first button 651 are referred to specifically, they are referred to as a first arm portion 661, and when the two arm portions corresponding to the second button 652 are referred to specifically, they are referred to as a second arm portion 662.

[0095] The two first arms 661 connecting the first button 651 on the right side to the base part 61 extend so as to move away from each other as they move from the first button 651 toward the second button 652 (toward the center in the left-right direction of the base part 61 / toward the left). That is, they extend in a V-shape toward the left. The two second arms 662 connecting the second button 652 on the left side to the base part 61 extend so as to move away from each other as they move from the first button 651 toward the second button 652 (toward the center in the left-right direction of the base part 61 / to the right). That is, they extend in a V-shape toward the right.

[0096] This arrangement allows the first button 651 and the second button 652 to be as close as possible to the left and right ends of the operation panel 60 (base portion 61), respectively. As described above, the facing portion 28 protrudes leftward and rightward from the rear projection area of ​​the grip portion 21. Both the first button 651 and the second button 652 are at least partially outside this projection area in the left-right direction. In other words, when the hammer drill 1 is viewed from the rear, a portion of the first button 651 is to the right of the grip portion 21, and a portion of the second button 652 is to the left of the grip portion 21 (see FIG. 5).

[0097] The operation panel 60 is provided with a protrusion 615 that protrudes from the inner surface 611 of the base portion 61 toward the circuit board 50. The protrusion 615 is provided between the two holes 62 in the left-right direction, and has five passages corresponding to the LEDs 81, 83, respectively, and transmits the light of the LEDs 81, 83 to five openings 616 on the outer surface 612 side of the base portion 61.

[0098] As shown in FIG. 10, in this embodiment, the operation panel 60 is supported by the facing portion 28, so that 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 that protrude from the ends corresponding to the pair of long sides of the base portion 61 and are generally parallel to the inner surface 611. Meanwhile, an opening 283 having a shape corresponding to the operation panel 60 is formed in the rear wall portion of the facing portion 28. Inside the facing portion 28, ribs 284 are provided adjacent to the upper end (front end) and 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 two protruding pieces 617 are fitted between the rear wall portion and the ribs 284. The base portion 61 is fitted into the opening 283 with almost no gap, which prevents dust from entering the inside of the handle body 2 from the opening 283.

[0099] 10 and 11, the flexible sheet 67 is attached to the operation panel 60 so as to cover the entire outer surface 612 and buttons 65 of the base portion 61 of the operation panel 60. More specifically, the flexible sheet 67 is integrated with the operation panel 60 by being adhered to the outer edge of the base portion 61. 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), forming the outer surface 600 of the operation portion 6. The flexible sheet 67 covers the holes 62 of the operation panel 60, thereby preventing dust from entering the inside of the handle body 2 from the operation portion 6.

[0100] The flexible sheet 67 is a flexible synthetic resin sheet. The material of the flexible sheet 67 is not particularly limited, but may be, for example, polyethylene terephthalate (PET), polycarbonate, or the like.

[0101] 1, symbols and / or letters relating to the type of switch 7 and information notified by notification unit 8 are marked on outer surface 600 of flexible sheet 67. In this embodiment, a plus (+) button mark 671 indicating an increase in rotation speed is marked at a position corresponding to first switch 71 and first button 651. Also, a minus (-) button mark 672 indicating a decrease in rotation speed is marked at a position corresponding to second switch 72 and second button 652. These marks may be embossed.

[0102] Furthermore, five transparent windows 675 that transmit light from the LEDs 81, 83 are provided in portions of the notification unit 8 corresponding to the LEDs 81, 83 (openings 616 of the base unit 61). Thus, the user can see the light from the LEDs 81, 83 through the openings 616 (see FIG. 12) and the windows 675.

[0103] As described above, the switch 7 is housed in the handle body 2 connected to the main housing 10 via the elastic bodies 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. In other words, unlike a rotating or sliding operation unit (e.g., a dial or a slide lever), the operation unit 6 does not substantially protrude from the outer surface (the facing surface 280) of the handle body 2. This reduces the possibility that the operation unit 6 is pressed by a hand or some object and the switch 7 is turned on when the user does not intend. In addition, compared to a rotating or sliding operation unit, the operation unit 6 of this embodiment is less likely to have a gap between the handle body 2 and the operation unit 6. This reduces the possibility that dust will enter the handle body 2 through the gap, leading to malfunction of the switch 7.

[0104] In addition, since the operation unit 6 of this embodiment is provided on the opposing 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 while gripping the grip portion 21. In particular, the operation unit 6 is excellent in operability because it is provided continuously with the opposing surface 280 that slopes upward as it approaches the front. In addition, the user can visually recognize parts of the first button 651 and the second button 652 from behind the grip portion 21, making operation easy.

[0105] Furthermore, in this embodiment, the light of the LEDs 81, 83 of the notification unit 8 can be seen through the window 675 of the flexible sheet 67. Since the notification unit 8 is disposed between the first button 651 and the second button 652 in the left-right direction, the user can easily see the information (rotation speed grade, operation mode) notified by the LEDs 81, 83 together with the operation unit 6.

[0106] The correspondence between each component (feature) of the above embodiment and each component (feature) of the present disclosure or invention is shown below. However, each component of the embodiment is merely an example and does not limit each component of the present disclosure or invention.

[0107] The hammer drill 1 is an example of a "reciprocating tool." The impact mechanism 41 is an example of a "reciprocating mechanism." The elastic body 230 is an example of an "elastic body." The upper connecting portion 24 of the handle body 2 is an example of a "first connecting portion." The connecting protrusion 122 of the main body housing 10 is an example of a "second connecting portion." The half bodies 2L and 2R are an example of "two handle half bodies." The half bodies 15L and 15R are an example of "two main body half bodies." The opening 113 is an example of a "rear end opening." The shaft support portion 152 of the main body housing 10 is an example of a "third connecting portion." The connecting shaft 271 is an example of a "fourth connecting portion."

[0108] It should be noted that the above embodiment is merely an example, and the reciprocating tool according to the present disclosure is not limited to the illustrated hammer drill 1. For example, non-limiting modifications exemplified below may be made. Furthermore, at least one of these modifications may be adopted in combination with the hammer drill 1 exemplified in the embodiment and any of the inventions described in the claims.

[0109] For example, a reciprocating tool according to the present disclosure may be embodied as an impact tool (e.g., a demolition hammer, scraper) configured to perform only a striking action, or as a reciprocating cutting tool (e.g., a reciprocating saw) configured to perform a cutting operation by reciprocating a cutting tool tip (e.g., a blade).

[0110] The configuration and / or arrangement of the motor and / or reciprocating mechanism in the reciprocating tool may be appropriately changed from the example of the above embodiment. For example, the motor may be arranged so that the motor shaft is perpendicular to the drive shaft, or the motor shaft may be arranged so that it extends parallel to the drive shaft. In addition, the reciprocating mechanism may be a well-known mechanism using, for example, a crankshaft.

[0111] The configuration of the main body housing and / or the handle body, and the manner of connection between the main body housing and the handle body are not limited to the examples of the above embodiment. For example, the main body housing does not necessarily have to be L-shaped. Also, the entire main body housing may be formed by connecting two half bodies divided in the left and right direction to each other. For example, the handle body may be a cantilever-shaped handle body with only one end of the handle body connected to the main body housing. Also, each of the two ends of the U-shaped handle body may be connected to the main body housing so as to be movable substantially only in the forward and backward directions relative to the main body housing. In this modified example, each of the two ends of the handle body may be connected to the main body housing by a connection structure similar to the connection structure by the upper connection part 24, the connection protrusion 122, and the elastic body 230 in the above embodiment.

[0112] The elastic body interposed between the main housing and the handle body may be made of various springs, elastomers, synthetic resin foams, etc., different from those used in the above embodiment.

[0113] Furthermore, in consideration of the spirit of the present invention, the above-mentioned embodiment and its modified examples, the following aspects are constructed. At least one of the following aspects may be adopted in combination with the above-mentioned embodiment and its modified examples, and at least one of the inventions described in each claim. [Aspect 1] An abutment portion is provided inside the main body housing and is configured to abut against the handle body when the handle body moves forward from the initial position relative to the main body housing, thereby determining the forwardmost position of the handle body relative to the main body housing. The "contact portion 175" is an example of the "contact portion" of this embodiment. [Aspect 2] The contact portion is formed by a second elastic body. [Aspect 3] A third elastic body is interposed between the third connecting portion and the fourth connecting portion. The elastic body 270 is an example of the "third elastic body" of this embodiment. [Aspect 4] The handle body has a battery mounting portion provided below the grip portion in the up-down direction. [Aspect 5] The reciprocating tool further comprises a controller configured to control driving of the motor, The controller is disposed within the handle body between the grip portion and the battery mounting portion in the up-down direction. [Aspect 6] The elastic body is disposed behind the protrusion within the internal space. [Aspect 7] At least a portion of the main body housing is formed by two main body halves connected to each other in a left-right direction perpendicular to the front-rear direction and the up-down direction, The second connecting portion is a projection that projects from one of the two main body halves toward the other. [Explanation of symbols]

[0114] 1: hammer drill, 10: main body housing, 11: first housing part, 110: opening, 111: barrel part, 113: opening, 12: handle storage part, 121: beam part, 122: connecting protrusion, 123: receiving part, 125: screw, 127: rib, 15: second housing part, 15L: half body, 15R: half body, 151: opening, 152: shaft support part, 153: recess, 17: inner housing, 175: abutment part, 2: handle body, 2L: half body, 2R: half body, 21: gripping portion, 211: trigger, 213: main switch, 23: upper extension portion, 230: elastic body, 235: abutment portion, 24: upper connection portion, 240: internal space, 241: opening, 242: rear end, 243: surface, 244: surface, 245: through hole, 247: spring support portion, 25: lower extension portion, 26: controller housing portion, 261: battery mounting portion, 27: pivot connection portion, 270: elastic body, 271: connection shaft, 28: opposing portion, 280: opposing surface, 283: opening, 284 : Rib, 30: Controller, 31: Motor, 310: Motor body, 315: Motor shaft, 4: Drive mechanism, 40: Spindle, 401: Tool holder, 41: Impact mechanism, 42: Motion conversion mechanism, 43: Swing member, 44: Impact element, 46: Rotation transmission mechanism, 5: Switch unit, 50: Circuit board, 51: Screw, 6: Operation unit, 60: Operation panel, 600: Outer surface, 61: Base part, 611: Inner surface, 612: Outer surface, 613: Protrusion, 615: Protruding part, 616: opening, 617: protruding piece, 62: hole, 65: button, 651: first button, 652: second button, 66: arm portion, 661: first arm portion, 662: second arm portion, 67: flexible sheet, 671: mark, 672: mark, 675: window, 7: switch, 70: push button, 71: first switch, 72: second switch, 8: notification portion, 81: LED, 83: LED, 91: tip tool, 93: battery, DX: drive shaft, MX: motor shaft, PX: rotation shaft

Claims

1. A reciprocating tool, Motor and, A reciprocating mechanism is operably connected to the motor and configured to reciprocate the tip tool linearly along a drive shaft that defines the front-rear direction of the reciprocating tool, A main housing that houses the motor and the reciprocating mechanism, A handle body including a gripping portion extending vertically and intersecting the drive shaft at the rear of the main housing, Equipped with an elastic body, One of the main body housing and the handle body has a first connecting portion, The other of the main body housing and the handle body has a second connecting portion, The main body housing and the handle body are connected to each other via the first connecting portion and the second connecting portion so as to be able to move relative to each other in the front-rear direction. The first connecting portion has an internal space and an opening that connects the internal space to the outside of the first connecting portion. The second connecting portion protrudes at least partially into the internal space through the opening of the first connecting portion, and is movable in the front-rear direction relative to the first connecting portion within the range of the opening. The elastic body is disposed within the internal space of the first connecting portion, and biases the first connecting portion and the second connecting portion so that the main body housing and the handle body move away from each other in the front-rear direction, characterized in that of a reciprocating tool.

2. A reciprocating tool according to claim 1, The first connecting portion is provided on the handle body, The reciprocating tool is characterized in that the second connecting portion is a projection provided on the main body housing.

3. A reciprocating tool according to claim 2, The reciprocating tool is characterized in that the first connecting portion is provided on the portion extending forward from the upper end of the gripping portion.

4. A reciprocating tool according to claim 2 or 3, At least a portion of the handle body is formed by two split handle bodies connected to each other in the left-right direction perpendicular to the front-rear direction and the up-down direction. The reciprocating tool is characterized in that the internal space of the first connecting portion is formed by the connection of the two half-handle bodies.

5. A reciprocating tool according to claim 2 or 3, At least a portion of the main body housing is formed by two half-body sections connected to each other in the left-right direction perpendicular to the front-rear and up-down directions, The reciprocating tool is characterized in that the second connecting portion is provided on one of the two half-body sections and connected to the other half-body section.

6. A reciprocating tool according to claim 2 or 3, The reciprocating tool is characterized in that the elastic body is in direct contact with the rear end of the second connecting portion in the front-rear direction.

7. A reciprocating tool according to claim 6, The front end of the second connecting portion is configured to abut against a part of the first connecting portion, thereby defining the initial position of the handle body relative to the main housing.

8. A reciprocating tool according to claim 2 or 3, The rear end of the main housing has a rear end opening that opens to the rear and connects the internal space of the main housing to the outside. The first connecting portion extends into the main body housing through the rear end opening, A reciprocating tool characterized in that the rear end of the opening of the first connecting portion is located in front of the rear end opening of the main body housing.

9. A reciprocating tool according to any one of claims 1 to 3, The main housing has a third connecting portion, The handle body has a fourth connecting portion, The main body housing and the upper end of the handle body are connected to each other via the first connecting portion and the second connecting portion so as to be able to move relative to each other in the front-rear direction. The reciprocating tool is characterized in that the main body housing and the lower end of the handle body are connected to each other via the third and fourth connecting portions so as to be able to move relative to each other around a pivot axis that extends in a left-right direction perpendicular to the front-rear direction and the up-down direction.

10. A reciprocating tool according to claim 9, The reciprocating tool is characterized in that the first connecting portion is arranged such that a straight line extending in the vertical direction perpendicular to the pivot axis passes through the first connecting portion.

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