Reciprocating power tool

Abstract

A reciprocating power tool is provided. The reciprocating power tool has a housing, a support body, a slide, a motor, a drive mechanism, a first force applying member, a manual operation member, and a first switching mechanism. The housing has a first axis that defines a front-rear direction of the reciprocating power tool. The support body is supported to the housing. The slide is supported by the support body so as to be movable in a linear manner. The drive mechanism is connected to the slide in a movable manner and reciprocates the slide relative to the support body by power of the motor. The first switching mechanism is connected to the manual operation member in a movable manner and selectively sets, according to a manual operation of the manual operation member, that the first force applying member is able to apply a force to the slide or that the first force applying member is unable to apply the force to the slide. The first force applying member applies a force downward to the slide when the first switching mechanism sets that the force is able to be applied. Accordingly, the ease of use of the reciprocating power tool can be improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a reciprocating power tool configured to reciprocate a blade. BACKGROUND

[0002] A reciprocating power tool configured to reciprocate a blade by power of a motor is known. For example, a reciprocating saw having a vibration preventing structure is proposed in Patent Literature 1.

[0003] [Prior Art Documents]

[0004] [Patent Literature]

[0005] Patent Literature 1: Japanese Patent Application Publication No. 2015-85429 SUMMARY

[0006] [Problems to be Solved by the Invention]

[0007] According to the above-described reciprocating saw, by suppressing transmission of vibration from the inner case to the outer case, it is possible to improve comfort during use. On the other hand, as for ease of use in various work conditions, there is room for further improvement.

[0008] An object of the present disclosure is to provide a technology that contributes to improvement of ease of use of a reciprocating power tool.

[0009] [Means of Solving the Problems]

[0010] According to one embodiment of the present disclosure, there is provided a reciprocating power tool including a housing, a support body, a slide, a motor, a drive mechanism, a first force applying member, a manual operation member, and a first switching mechanism.

[0011] The housing has a first axis that defines a front-rear direction of the reciprocating power tool. The support body is supported to the housing. The slide is supported by the support body in a manner that enables linear movement. The slide has a front end portion to which a blade having a blade tip is attachable. The drive mechanism is configured to be connected to the slide in a manner that enables operation and to cause the slide to reciprocate relative to the support body by power of a motor. The first force applying member is configured to selectively apply force to the slide. The first switching mechanism is configured to be connected to the manual operation member in a manner that enables operation and to selectively set whether the first force applying member can apply force to the slide or the first force applying member cannot apply force to the slide in accordance with manual operation of the manual operation member. In an up-down direction orthogonal to the first axis, a direction in which the blade tip of the blade faces when the reciprocating power tool is normally used is set to be downward. When set to be able to apply force by the first switching mechanism, the first force applying member applies force to the slide downward. In addition, in the present embodiment, the first force applying member can directly apply force to the slide or indirectly apply force to the slide via the first force applying member.

[0012] According to the reciprocating power tool of the present embodiment, the user switches the state of the first force applying member between a state in which the first force applying member can apply force to the slide (hereinafter, simply referred to as a force applying state) and a state in which the first force applying member cannot apply force to the slide (hereinafter, simply referred to as a non-force applying state) by manually operating the manual operation member via the first switching mechanism. Therefore, the user can manually operate the manual operation member in accordance with the work conditions (for example, the type of workpiece) to cause the first force applying member to be in an appropriate state. Accordingly, the ease of use of the reciprocating power tool can be improved.

[0013] According to an embodiment of the present disclosure, there is provided a reciprocating power tool including a housing, a support body, a slide, a motor, a drive mechanism, a first force applying member, a manual operation member, and a first switching mechanism.

[0014] The housing has a first axis that defines a front-rear direction of the reciprocating power tool. The support body has a second axis. The support body extends substantially in the front-rear direction within the housing. The support body is supported to the housing in a manner that enables oscillation in an up-down direction orthogonal to the first axis. The slide is an elongated slide. The slide is supported by the support body in a manner that enables linear movement along the second axis. In addition, the slide has a front end portion to which a blade having a blade tip is attachable. The drive mechanism is connected to the slide in a manner that enables operation. The drive mechanism is configured to cause the slide to reciprocate relative to the support body along the second axis by power of a motor.

[0015] The first force applying member is configured to selectively apply a force to the support body. The first switching mechanism is operatively connected to the manual operation member. The first switching mechanism is configured to selectively set, in accordance with a manual operation of the manual operation member, whether the first force applying member can apply a force to the support body or the first force applying member cannot apply a force to the support body. In the up-down direction, a direction in which a blade tip of a blade faces when the reciprocating power tool is used normally is defined as the lower side. When set by the first switching mechanism to be able to apply a force, the first force applying member applies a force to the support body in a first direction in which a front end portion of the support body swings downward. Further, in the present embodiment, the first force applying member can directly apply a force to the support body or can indirectly apply a force to the support body.

[0016] According to the reciprocating power tool of the present embodiment, the user switches the state of the first force applying member between a state in which the first force applying member can apply a force to the support body (hereinafter, simply referred to as a force applying state) and a state in which the first force applying member cannot apply a force to the support body (hereinafter, simply referred to as a non-force applying state) by manually operating the manual operation member via the first switching mechanism. Therefore, the user can manually operate the manual operation member in accordance with a work condition (for example, a type of a workpiece) to make the first force applying member be in an appropriate state. Accordingly, the ease of use of the reciprocating power tool can be improved.

[0017] In one embodiment of the present disclosure, the reciprocating power tool can further include a blocking member configured to selectively block the application of a force by the first force applying member. The first switching mechanism can also be configured to selectively cause the blocking member to block the application of a force in accordance with a manual operation of the manual operation member. According to the present embodiment, the force applying state and the non-force applying state can be easily switched using the blocking member.

[0018] In one embodiment of the present disclosure, the first switching mechanism can include a movable member. The movable member can be configured to selectively move the blocking member to a blocking position in which the blocking member blocks the application of a force by moving in accordance with a manual operation. According to the present embodiment, the application of a force can be easily blocked by simply moving the blocking member to the blocking position.

[0019] In one embodiment of the present disclosure, the movable member can be a shaft that is operatively connected to the manual operation member and can be rotated in accordance with a manual operation of the manual operation member. The shaft can have a cam portion configured to selectively abut against the blocking member and move the blocking member to the blocking position in accordance with a rotation of the shaft. According to the present embodiment, the blocking member can be moved by the shaft having the cam portion, which is a simple structure.

[0020] In one embodiment of the present disclosure, the reciprocating power tool can further include a trajectory mechanism and a second switching mechanism. The trajectory mechanism can be configured to selectively cause the blade to perform a trajectory movement by causing the slide to swing in the up-down direction during reciprocating movement of the slide by the driving mechanism. Further, the so-called trajectory movement typically refers to movement along an elliptical trajectory path. The second switching mechanism can be connected to the manual operation member in an operable manner and configured to selectively change the operation of the trajectory mechanism in accordance with manual operation of the manual operation member. Further, in this embodiment, the so-called "change in the operation of the trajectory mechanism" includes, for example, disabling the operation of the trajectory mechanism and changing the amount of swing of the slide by the trajectory mechanism (i.e., changing the trajectory path of the trajectory movement of the blade).

[0021] According to this embodiment, the user can change the operation of the trajectory mechanism via the second switching mechanism by manually operating the manual operation member. The user can manually operate the manual operation member in accordance with the work conditions (e.g., the type of workpiece) to cause the operation of the trajectory mechanism to be in an appropriate state. In addition, the same manual operation member can switch the states of both the first switching mechanism and the second switching mechanism. Accordingly, the increase in the number of components can be suppressed and the operability can be improved.

[0022] In one embodiment of the present disclosure, the first switching mechanism and the second switching mechanism can include a common shaft that is connected to the manual operation member in an operable manner and can be rotated in accordance with manual operation of the manual operation member. The first switching mechanism can include a first switching portion that is provided on the shaft and configured to selectively set the first biasing member to be able to bias or unable to bias in accordance with the rotation of the shaft. In addition, the second switching mechanism can include a second switching portion that is provided on the shaft and configured to selectively change the operation of the trajectory mechanism in accordance with the rotation of the shaft. According to this embodiment, by a simple structure of a single shaft and the first switching portion and the second switching portion provided on the shaft, respectively, the states of both the first biasing member and the trajectory mechanism can be switched.

[0023] In one embodiment of the present disclosure, the manual operation member can also be able to be turned to at least the first turning position, the second turning position, and the third turning position. The first switching section can also be configured such that the first biasing member is able to bias when the manual operation member is disposed in the first turning position, and is unable to bias when the manual operation member is disposed in the second turning position and when the manual operation member is disposed in the third turning position. The second switching section can also change the operation of the trajectory mechanism at least when the manual operation member is disposed in the second turning position and when the manual operation member is disposed in the third turning position. According to this embodiment, the user is able to select an appropriate combination from at least three combinations of the state of the first biasing member and the state of the trajectory mechanism according to the work situation by merely turning the manual operation member.

[0024] In one embodiment of the present disclosure, the reciprocating power tool can also have a partition member interposed between the support body and the first biasing member. The first switching section and the second switching section can each be configured as a first cam section and a second cam section. The drive mechanism can include a crank plate. The crank plate can be disposed on the lower side of the rear end portion of the support body and configured to be driven to rotate about a rotation axis extending in the up-down direction by the power of the motor. The crank plate can have a crank pin fixed to a position eccentric from the rotation axis and connected to the slider in a manner that allows movement. The trajectory mechanism can also include a third cam section and a second biasing member. The third cam section can be a circular ring-shaped protruding section provided to the crank plate, configured to protrude upward from the upper surface of the crank plate and have a thickness in the up-down direction that varies in the circumferential direction about the rotation axis. The second biasing member can bias the rear end portion of the support body in a direction that abuts against the third cam section. The first cam section can release the partition member from a partition position that partitions the application of biasing force by the first biasing member when the manual operation member is disposed in the first turning position. The first cam section can also abut against the partition member to hold the partition member in the partition position when the manual operation member is disposed in the second turning position and when the manual operation member is disposed in the third turning position. The second cam section can abut against the support body to hinder the rear end portion of the support body from abutting against the third cam section at least for a certain period during one rotation of the crank plate when the manual operation member is disposed in the second turning position. The second cam section can also be configured to allow the rear end portion of the support body to abut against the third cam section throughout a period during one rotation of the crank plate when the manual operation member is disposed in the third turning position. According to this embodiment, a reasonable mechanism that allows the blade to perform trajectory movement while the slider is reciprocated is realized using the crank plate. Furthermore, the states of both the first biasing member and the trajectory mechanism can be switched by a simple structure in which a single shaft and the first cam section and the second cam section are each provided to the shaft. Moreover, according to this embodiment, a greater trajectory movement of the blade is allowed when the manual operation member is disposed in the third turning position than when the manual operation member is disposed in the second turning position.

[0025] In one embodiment of the present disclosure, the support body can also be able to swing with respect to the case about an axis extending in a left-right direction that is orthogonal to the front-rear direction and the up-down direction. According to this embodiment, a reasonable support structure of the support body is realized.

[0026] In one embodiment of the present disclosure, the reciprocating power tool can also have an abutting portion configured to regulate the amount of movement of the slide in the second direction by abutting against the support body or the slide, the second direction being a direction opposite to the force application direction of the first force application member. According to this embodiment, when the user presses the blade against the workpiece to cause a certain degree of elastic deformation of the first force application member, the abutting portion can hinder the slide from further moving in the second direction. Thereby, the pressing force of the user can be efficiently transmitted to the workpiece.

[0027] In one embodiment of the present disclosure, the first force application member can also be a compression coil spring disposed between the support body and the case in the up-down direction. According to this embodiment, a first force application member of a simple structure is realized.

[0028] In one embodiment of the present disclosure, the reciprocating power tool can also have a partition member disposed between the support body and the compression coil spring in a manner movable in the up-down direction. The first switching mechanism can be configured to selectively hold the partition member in a partition position separated from the support body or allow the partition member to abut against the support body in accordance with the manual operation of the manual operation member. The compression coil spring can apply force to the support body through the partition member when the partition member is allowed to abut against the support body. According to this embodiment, a relatively simple and reasonable structure in which the state of the force application member is switched using the compression coil spring and the partition member can be realized.

[0029] In one embodiment of the present disclosure, the compression coil spring and the partition member can be supported by a common support member extending in the up-down direction. According to this embodiment, a compact and simple support structure of the compression coil spring and the partition member can be realized. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a left view of the reciprocating saw.

[0031] Figure 2 is a sectional view of the reciprocating saw, showing a state in which the slide is disposed at the first slide position in the third operation mode.

[0032] Figure 3 is a sectional view of the reciprocating saw, showing a state in which the slide is disposed at the second slide position in the third operation mode. Figure 2 is a sectional view of the reciprocating saw, showing a state in which the slide is disposed at the second slide position in the third operation mode.

[0033] Figure 4 is a sectional view of the reciprocating saw, showing a state in which the slide is disposed at the second slide position in the third operation mode. Figure 3Corresponding sectional view, showing the slider configured in the second slider position.

[0034] Figure 5 Is a perspective view of the force application mechanism, the switching lever and the switching mechanism when the third mode of operation is selected.

[0035] Figure 6 Is a sectional view of Figure 2 VI-VI.

[0036] Figure 7 Is a sectional view of Figure 2 VII-VII.

[0037] Figure 8 Is a partial sectional view of the reciprocating saw, showing the slider configured in the first slider position in the unloaded state of the first mode of operation.

[0038] Figure 9 Is a perspective view of the force application mechanism, the switching lever and the switching mechanism when the first mode of operation is selected.

[0039] Figure 10 Is a sectional view of Figure 8 X-X.

[0040] Figure 11 Is a sectional view of Figure 8 XI-XI.

[0041] Figure 12 Is a partial sectional view of the reciprocating saw, showing the slider configured in the first slider position in the second mode of operation.

[0042] Figure 13 Is a perspective view of the force application mechanism, the switching lever and the switching mechanism when the second mode of operation is selected.

[0043] Figure 14 Is a sectional view of Figure 12 XIV-XIV.

[0044] Figure 15 Is a sectional view of Figure 12 XV-XV.

[0045] Figure 16 Is a corresponding sectional view, showing the slider configured in the second slider position. Figure 12

[0046] Is a corresponding sectional view, showing the slider configured in the second slider position. Figure 17 Figure 8 Is a corresponding sectional view, showing the slider configured in the second slider position.

[0047] Figure 18 ​is a partial cross-sectional view of the reciprocating saw, showing a state in which the slider is disposed at the first slider position in a load state of the first operation mode.

[0048] Figure 19 is a corresponding cross-sectional view, showing a state in which the slider is disposed at the second slider position in a load state of the first operation mode. Figure 18

[0049] BRIEF DESCRIPTION OF REFERENCE NUMERALS

[0050] 1: reciprocating saw; 11: main body case; 111: opening; 113: shoe portion; 12: gear case; 121: opening; 123: support pin; 13: support body; 130: support hole; 131: sliding bearing; 132: sliding bearing; 133: abutting portion; 141: pin; 145: bearing; 18: handle; 181: grip portion; 182: trigger; 183: switch; 187: battery case; 30: controller; 31: motor; 311: main body portion; 315: motor shaft; 316: pinion; 4: drive mechanism; 5: slider; 6: trajectory mechanism; 7: force applying mechanism; 41: intermediate shaft; 43: bevel gear; 45: crank plate; 451: crank pin; 453: bearing; 455: connecting member; 46: cam portion; 51: blade mounting portion; 53: blade mounting portion; 55: pin connecting portion; 551: guide recess; 61: cam portion; 63: force applying member; 71: force applying member; 73: partition member; 731: first abutting portion; 733: connecting portion; 735: second abutting portion; 81: switching lever; 82: switching mechanism; 83: switching shaft; 84: first switching portion; 841: cam portion; 842: flat surface portion; 843: curved surface portion; 85: second switching portion; 852: flat surface portion; 853: curved surface portion; 91: blade (saw blade); 911: plate surface; 913: blade tip (blade edge); 93: battery; Al: long axis; A2: drive axis; A3: rotation axis; A4: rotation axis. DETAILED DESCRIPTION

[0051] Hereinafter, a reciprocating saw 1 according to an embodiment will be described with reference to the drawings. Figure 1 and Figure 2 The reciprocating saw 1 shown in FIG. 1 is an example of a hand-held reciprocating power tool. The reciprocating saw 1 is configured to be able to cut a workpiece (wood, plastic material, steel material, etc.) by reciprocating a thin plate-shaped blade 91 that is attached in a detachable manner. In addition, the reciprocating saw can also be referred to as a saber saw.

[0052] First, the general structure of the reciprocating saw 1 will be described.

[0053] As Figure 1 and Figure 2 ​As shown, the outline of the reciprocating saw 1 is mainly formed by the main housing 11 and the handle 18.

[0054] The main housing 11 is a long hollow body. The main housing 11 has a long axis A1. In the main housing 11, a motor 31, a slide 5 to which a blade 91 is attachable, a drive mechanism 4 that reciprocates the slide 5 by power of the motor 31, and the like are housed. An opening 111 is provided at one end of the main housing 11 in the extension direction of the long axis A1 (hereinafter, also simply referred to as the long axis direction). The opening 111 is disposed on the long axis A1, and the blade 91 attached to the slide 5 extends to the outside of the main housing 11 through the opening 111. A shoe-shaped portion 113 that abuts against a workpiece during work is detachably attached in the vicinity of the opening 111.

[0055] The handle 18 is a hollow body formed in a substantially C shape. The handle 18 is connected to the other end of the main housing 11 in the long axis direction, and forms a ring together with the rear end of the main housing 11. The handle 18 includes a grip portion 181 that is gripped by a user. The grip portion 181 extends in a direction intersecting (more specifically, substantially orthogonal to) the long axis A1 of the main housing 11. A trigger 182 for starting the motor 31 is provided on the grip portion 181. A switch 183 is housed in the grip portion 181. In addition, a battery housing 187 is provided on the handle 18. A rechargeable battery (also referred to as a battery pack) 93 that is a power source of the reciprocating saw 1 is detachably attached to the battery housing 187. Furthermore, although detailed illustration and description are omitted, the battery housing 187 is a component separate from the handle 18, and is connected to the handle 18 via an elastic body. However, instead of the battery housing 187, a battery attachment portion that can detachably attach the battery 93 can be provided at the lower end of the handle 18. In addition, a controller 30 is housed in the handle 18.

[0056] When the user performs a pressing operation on the trigger 182, the switch 183 is turned on, the motor 31 is energized, and the blade 91 is reciprocated substantially in the long axis direction of the main housing 11 by the drive mechanism 4.

[0057] The detailed structure of the reciprocating saw 1 will now be described. Furthermore, for convenience, in the following description, the extension direction of the long axis A1 of the main body housing 11 is defined as the front-rear direction of the reciprocating saw 1. In the front-rear direction, the side with the opening 111 is defined as the front side of the reciprocating saw 1, and the opposite side (the handle 18 side) is defined as the rear side. The direction orthogonal to the long axis A1 and approximately parallel to the surface 911 of the blade 91 mounted on the slider 5 (or, the direction orthogonal to the long axis A1 and approximately corresponding to the extension direction of the handle 181) is defined as the vertical direction of the reciprocating saw 1. In the vertical direction, the direction in which the tip 913 of the blade 91 faces during normal use is defined as downward, and the opposite direction is defined as upward. Furthermore, the direction orthogonal to both the front-rear and vertical directions is defined as the left-right direction of the reciprocating saw 1.

[0058] First, the internal structure of the main shell 11 will be explained.

[0059] like Figure 2 As shown, the main body housing 11 mainly houses the motor 31, the drive mechanism 4, the support body 13, and the slider 5.

[0060] Motor 31 is housed at the rear end of main body housing 11. The motor in this embodiment is a brushless DC motor. Motor 31 has: a main body 311 including a stator and a rotor; and a motor shaft 315 capable of rotating integrally with the rotor. Motor 31 is configured such that the axis of rotation of motor shaft 315 extends parallel to (i.e., in the longitudinal direction) the long axis A1 of main body housing 11. A pinion 316 is provided at the front end of motor shaft 315. Pinion 316 is a bevel gear. Pinion 316 is integrally formed with motor shaft 315 and rotates together with motor shaft 315 about the axis of rotation.

[0061] Furthermore, in this embodiment, the drive of motor 31 is controlled by controller 30. Although detailed illustrations are omitted, controller 30 has a microcomputer including CPU, ROM, RAM, etc. When switch 183 is turned on, controller 30 drives motor 31.

[0062] In this embodiment, the drive mechanism 4 and the slider 5 are housed within the main housing 11 on the front side of the motor 31. Furthermore, in this embodiment, the drive mechanism 4 and the slider 5 are housed within the gear housing 12. The gear housing 12 is also held in a fixed state within the main housing 11. Accordingly, the gear housing 12 can also be understood as a single housing integral with the main housing 11. Additionally, the slider 5 is supported within the gear housing 12 by a support body 13. The gear housing 12 is generally a long, hollow body with an opening 121 at its front end. A blade 91 mounted on the slider 5 extends through the opening 121 to the outside of the gear housing 12.

[0063] Next, the drive mechanism 4 will be described. The drive mechanism 4 is a mechanism configured to transmit the rotational power of the motor shaft 315 to the slide 5 to drive the slide 5.

[0064] As shown in FIG. 1, the drive mechanism 4 includes an intermediate shaft 41, a bevel gear 43, and a crank plate 45. Figure 3

[0065] The intermediate shaft 41 is disposed in the lower end portion of the main body case 11 (the gear case 12) at a position further forward than the front end portion of the motor shaft 315. The intermediate shaft 41 is rotatably supported by two bearings. The rotational axis A3 of the intermediate shaft 41 extends in the vertical direction.

[0066] The bevel gear 43 is coaxially mounted on the intermediate shaft 41 and is rotatable about the rotational axis A3 of the intermediate shaft 41 integrally with the intermediate shaft 41. The bevel gear 43 is disposed on the lower side of the motor shaft 315 and engages with the pinion gear 316. Thus, the bevel gear 43 rotates together with the intermediate shaft 41 in conjunction with the driving of the motor 31.

[0067] The crank plate 45 is a plate-like member that is circular in plan view, is disposed coaxially with the intermediate shaft 41, and is fixed to the upper side of the intermediate shaft 41. Thus, the crank plate 45 is rotatable about the rotational axis A3 integrally with the intermediate shaft 41.

[0068] The crank plate 45 has a crank pin 451. The crank pin 451 is fixed to the crank plate 45 at a position eccentric with respect to the rotational axis A3 and protrudes upward from the upper surface of the crank plate 45. A substantially cylindrical connecting member 455 is disposed around the crank pin 451. A bearing (specifically, a needle bearing) 453 is interposed between the crank pin 451 and the connecting member 455 in the radial direction of the crank pin 451. Thus, the connecting member 455 is rotatable about the axis of the crank pin 451 with respect to the crank pin 451. Furthermore, the outer peripheral surface of the connecting member 455 is not a pure cylindrical surface but is curved toward the upper end and the lower end.

[0069] Next, the support body 13 will be described. The support body 13 is an elongated member supported so as to extend substantially in the front-rear direction within the gear case 12. In the present embodiment, the support body 13 has an upper wall, a left wall, and a right wall.

[0070] ​A slide bearing (also referred to as a plain bearing) 131, 132 is fixed to the front end portion and the rear end portion of the support body 13, respectively. The slide bearings 131, 132 are arranged in a coaxial manner, and the axis of the slide bearings 131, 132 defines the long axis of the support body 13. The slider 5 is inserted in the slide bearings 131, 132 in a coaxial manner, and is supported by the slide bearings 131, 132 in a manner so as to be slidable along the long axis of the support body 13. That is, the long axis of the support body 13 defines the drive axis A2 of the slider 5.

[0071] In addition, the support body 13 is supported in a manner so as to be swingable in the up-down direction with respect to the gear housing 12. More specifically, the support body 13 is connected to the gear housing 12 via a pin 141. The pin 141 extends in the left-right direction within the gear housing 12, and both end portions thereof are supported to the gear housing 12. The pin 141 is inserted into support holes 130 provided in the lower front end portions of the left wall and the right wall of the support body 13, respectively. With this structure, the support body 13 is swingable in the up-down direction about the axis of the pin 141 with the pin 141 as a fulcrum.

[0072] Next, the slider 5 will be described. As shown in FIG. 1, the slider 5 is a long member extending in a straight line as a whole. The slider 5 is arranged in a manner so as to extend in the front-rear direction within the main housing 11 (the gear housing 12). In the present embodiment, the slider 5 includes a main body 51, a blade mounting portion 53, and a pin connecting portion 55. Figure 3

[0073] The main body 51 is a portion of the slider 5 that is supported by the slide bearings 131, 132 of the support body 13. The main body 51 is formed in a cylindrical shape having a substantially uniform diameter. The blade mounting portion 53 is provided at the front end portion of the slider 5. The base end portion of the blade 91 is detachably mounted to the blade mounting portion 53 (see FIG. 2). Figure 2

[0074] The pin connecting portion 55 is provided integrally with the main body 51 at a portion slightly toward the rear of the central portion in the front-rear direction of the main body 51. The pin connecting portion 55 extends in the left-right direction in a manner orthogonal to the axis of the main body 51 (i.e., the drive axis A2). Although detailed illustration is omitted, the width of the pin connecting portion 55 in the left-right direction is larger than the diameter of the main body 51, and the left end portion and the right end portion of the pin connecting portion 55 protrude toward the left and the right with respect to the main body 51, respectively. A guide recess 551 recessed upward is formed in the lower portion of the pin connecting portion 55. The guide recess 551 extends over the entire length of the pin connecting portion 55 in the left-right direction.

[0075] ​​The pin connecting portion 55 is connected to the crank pin 451 in an operable manner. More specifically, the upper portion of the crank pin 451 in a state where the bearing 453 and the connecting member 455 are attached is inserted into the guide recess 551. The width of the guide recess 551 in the front-rear direction is substantially equal to the maximum diameter of the connecting member 455. On the other hand, the length of the guide recess 551 in the left-right direction is set to be slightly larger than the diameter of the turning locus of the crank pin 451 centered on the rotation axis A3. Further, since the connecting member 455 has the outer peripheral surface as described above, the connecting member 455 can be smoothly moved within the guide recess 551 regardless of the position of the slider 5 in the up-down direction.

[0076] With this structure, the crank pin 451 can be moved in the left-right direction within the guide recess 551 in a state where the movement of the crank pin 451 in the front-rear direction with respect to the guide recess 551 is restricted. When the crank plate 45 rotates together with the intermediate shaft 41, the crank pin 451 turns around centered on the rotation axis A3. At this time, only the front-rear direction component in the turning motion of the crank pin 451 is transmitted to the pin connecting portion 55, and the slider 5 reciprocates in the front-rear direction along the drive axis A2 with respect to the support body 13. In this way, the crank plate 45 having the crank pin 451 and the pin connecting portion 55 of the slider 5 constitute a motion conversion mechanism that converts the rotational motion of the motor shaft 315 into the linear reciprocating motion of the slider 5.

[0077] The reciprocating saw 1 of the present embodiment has three operation modes (first operation mode, second operation mode, and third operation mode). The reciprocating saw 1 operates according to the operation mode selected by the user among the first operation mode, the second operation mode, and the third operation mode.

[0078] The first operation mode is an operation mode in which the blade tip 913 is suppressed from jumping upward by applying a force to the support body 13 in a direction in which the blade tip 913 swings downward.

[0079] The second operation mode and the third operation mode are operation modes in which the blade 91 is moved along an elliptical trajectory path by causing the slider 5 to reciprocate linearly in the front-rear direction while swinging in the up-down direction. Further, the movement of the blade 91 along the elliptical trajectory path will also be referred to as trajectory motion or trajectory operation hereinafter. The second operation mode and the third operation mode differ in the amount of trajectory motion of the blade 91 (i.e., the trajectory path of the blade 91). Specifically, in the third operation mode, the trajectory motion of the blade 91 is allowed to be greater than in the second operation mode.

[0080] Next, a mechanism for applying a force to the support body 13 in a direction in which the blade tip 913 swings downward (hereinafter, referred to as a force application mechanism 7) will be described. As shown in FIG. 1, the force application mechanism 7 includes a force application member 71 and a force application lever 72. Figures 5-8As shown, the force applying mechanism 7 is disposed in the rear end portion of the main body case 11 (the gear case 12). The force applying mechanism 7 includes two force applying members 71 and a partition member 73.

[0081] The force applying member 71 of the present embodiment is a compression coil spring. The force applying member 71 is supported by two support pins 123. The support pins 123 are fixed to the gear case 12 and protrude upward. The two support pins 123 are disposed separately in the left-right direction at positions that are rearward and downward of the rear end of the support body 13. The force applying member 71 is supported by the support pins 123 in a manner that the axis of the coil extends in the up-down direction.

[0082] The partition member 73 is a single member made of metal that includes a left and right pair of first abutting portions 731, a connecting portion 733, and a second abutting portion 735. The first abutting portions 731 are rectangular plate-shaped portions that extend in the front-rear direction in parallel with each other and are disposed separately in the left-right direction. The connecting portion 733 is a portion that connects the rear end portions of the left and right pair of first abutting portions 731 and is a plate-shaped portion that is bent into an inverted U shape (protrudes upward). The second abutting portion 735 is a rectangular plate-shaped portion that extends forward from the front end of the connecting portion 733. Support holes are provided in the rear end portions of the pair of first abutting portions 731, respectively. The support holes have diameters that are substantially equal to the diameters of the support pins 123. The partition member 73 is supported in a state in which the support pins 123 are inserted in the support holes and the first abutting portions 731 are placed on the upper side of the force applying member 71.

[0083] The partition member 73 is upwardly forced with respect to the gear case 12 by the force applied by the force applying member 71. When the first operation mode is selected, the second abutting portion 735 abuts against the rear end portion of the support body 13 (to be specific, against a fixed plate (hereinafter referred to as an abutting portion 133) that covers the lower end portion of the sliding bearing 132), as will be described later in detail. On the other hand, in the case where the first operation mode is not selected, the first abutting portions 731 are pressed from above to be held in a prescribed position in a state in which the force applying member 71 is compressed. At this time, the second abutting portion 735 is disposed at a position that is separated downward from the abutting portion 133 of the support body 13, and the force applied by the force applying member 71 to the support body 13 is partitioned.

[0084] Next, the mechanism for causing the blade 91 to perform a trajectory motion (hereinafter referred to as a trajectory mechanism 6) will be described. The trajectory mechanism 6 is a mechanism configured to swing the support body 13 in the up-down direction as the slider 5 moves in the front-rear direction. In the present embodiment, the trajectory mechanism 6 includes a cam portion 61 and a force applying member 63.

[0085] As shown in FIG. 6, the cam portion 61 is a plate-shaped portion that is bent into an inverted U shape (protrudes upward) and is disposed in the gear case 12. The force applying member 63 is a compression coil spring that is supported by the support pins 123 in a manner that the axis of the coil extends in the up-down direction. Figure 3 and Figure 4As shown, the cam portion 61 is provided on the crank plate 45. The cam portion 61 is a circular ring-shaped portion provided along the outer edge of the crank plate 45 in a manner that protrudes upward from the upper surface of the crank plate 45. The protruding amount of the cam portion 61 from the upper surface of the crank plate 45 (i.e., the thickness of the cam portion 61 in the up-down direction) varies in the circumferential direction. More specifically, as shown in FIG. 6, the cam portion 61 is inclined in the forward direction with respect to an imaginary plane orthogonal to the rotation axis A3 of the intermediate shaft 41 when the thickest portion of the cam portion 61 is located at the rearmost position. Hereinafter, the rotational position of the crank plate 45 when the thickest portion of the cam portion 61 is located at the rearmost position will be referred to as the first rotational position. The position of the slider 5 in the forward-backward direction when the crank plate 45 is located at the first rotational position will be referred to as the first slider position. In addition, the rotational position of the crank plate 45 when the thinnest portion of the cam portion 61 is located at the rearmost position will be referred to as the second rotational position. The position of the slider 5 in the forward-backward direction when the crank plate 45 is located at the second rotational position will be referred to as the second slider position. Figure 3

[0086] The urging member 63 is disposed between the upper wall of the gear housing 12 and the upper wall of the support body 13. In the present embodiment, the urging member 63 is a compression coil spring. The urging member 63 is disposed in a compressed state between the rear end portion of the gear housing 12 and the rear end portion of the support body 13, and always urges the rear end portion of the support body 13 downward with respect to the main body housing 11 (the gear housing 12). That is, the urging member 63 urges the support body 13 in a direction in which the support body 13 swings upward toward the front end portion (the blade 91) of the support body 13. Furthermore, although detailed illustration is omitted, in the present embodiment, two urging members 63 are provided corresponding to the left end portion and the right end portion of the support body 13.

[0087] In addition, a bearing 145 is fitted around the outer periphery of the front end portion of the slide bearing 132 mounted to the rear side of the support body 13. Furthermore, the bearing 145 is a ball bearing, and the inner ring of the bearing 145 is press-fitted to the slide bearing 132. The outer ring of the bearing 145 is rotatable with respect to the support body 13 about the drive axis A2. In the up-down direction, the rear end portion of the crank plate 45 (a portion of the cam portion 61) is disposed directly below the bearing 145.

[0088] As described above, the rear end portion of the support body 13 is urged downward by the urging member 63 (i.e., in a direction in which the bearing 145 approaches the cam portion 61). Therefore, as long as the swing of the support body 13 is not prohibited, or as long as an external force that swings the support body 13 in the opposite direction is not applied, the bearing 145 will maintain a state of abutting against the cam portion 61 of the crank plate 45 from above.

[0089] ​When the motor 31 is driven in a state where the bearing 145 is in abutment with the cam portion 61, the bearing 145 moves while rotating on the upper end surface (cam surface) of the cam portion 61 as the crank plate 45 rotates. The thickness of the portion of the cam portion 61 in abutment with the bearing 145 changes as the crank plate 45 rotates. Thus, the bearing 145 moves in the up-down direction.

[0090] More specifically, as shown in Figure 3 , when the crank plate 45 is disposed in the first rotational position, the bearing 145 is in abutment with the thickest portion of the cam portion 61. At this time, the slider 5 is disposed in the first slider position, and the bearing 145 is disposed in the uppermost position within the range in which it moves up and down in abutment with the cam portion 61. On the other hand, as shown in Figure 4 , when the crank plate 45 is rotated to the second rotational position, the bearing 145 is in abutment with the thinnest portion of the cam portion 61. At this time, the slider 5 is disposed in the second slider position, and the bearing 145 is disposed in the lowermost position within the range in which it moves up and down in abutment with the cam portion 61.

[0091] With this structure, the support body 13 is able to swing in the up-down direction about the pin 141 in accordance with the rotation of the crank plate 45 (i.e., the reciprocating movement of the slider 5). The blade 91 performs a trajectory movement in which it moves forward while swinging upward, and moves rearward while swinging downward.

[0092] The mechanism for switching the operation mode of the reciprocating saw 1 will be described below.

[0093] In the present embodiment, the operation mode of the reciprocating saw 1 is switched by the switching mechanism 82 in accordance with a manual operation of the switching lever 81 by the user. As shown in Figure 1 , the switching lever 81 is provided outside the main body case 11 (more specifically, the left side surface of the main body case 11). As shown in Figure 3 , Figures 5-7 , the switching mechanism 82 includes a switching shaft 83, a first switching portion 84, and a second switching portion 85.

[0094] The switching shaft 83 is a shaft that extends in the left-right direction within the rear end portion of the gear case 12. The switching shaft 83 is supported to the gear case 12 in a state in which both end portions thereof are inserted through support holes formed in the left and right walls of the gear case 12. The switching shaft 83 is able to rotate about a rotation axis A4 that extends in the left-right direction. The switching lever 81 is fixed to the left end portion of the switching shaft 83. Thus, the switching shaft 83 also rotates in accordance with a rotational operation of the switching lever 81.

[0095] Furthermore, the switching shaft 83 is positioned directly below the abutment portion 133 of the support body 13 (specifically, the portion behind the bearing 145). Additionally, the switching shaft 83 is positioned directly above the first abutment portion 731 of the partition member 73 of the force application mechanism 7 and in front of the second abutment portion 735.

[0096] Both the first switching unit 84 and the second switching unit 85 are mounted on the switching shaft 83. The first switching unit 84 switches between a state where the force-applying mechanism 7 can operate (apply force to the support body 13) and a state where the force-applying mechanism 7 cannot operate, depending on the rotational position of the switching shaft 83. The second switching unit 85 switches between a state that fully allows (does not hinder) the operation of the trajectory mechanism 6 (the support body 13 swings in the vertical direction) and a state that partially hinders the operation of the trajectory mechanism 6, depending on the rotational position of the switching shaft 83. In other words, in this embodiment, both the switching of the state of the force-applying mechanism 7 and the switching of the state of the trajectory mechanism 6 are achieved using a single component, the switching shaft 83.

[0097] The details of the first switching unit 84 will be explained below.

[0098] like Figure 3 , Figures 5-6 As shown, the first switching part 84 includes a pair of left and right cam parts 841. The cam parts 841 are respectively disposed at the left and right ends of the switching shaft 83. The cam parts 841 are cam parts with a generally crescent (semi-circular) cross-section. The outer surface of the cam part 841 includes: a flat part 842, which includes a rotation axis A4; and a curved part 843, which is arc-shaped. The pair of cam parts 841 are respectively disposed directly above the pair of left and right first abutment parts 731 of the partition member 73.

[0099] like Figures 8-11 As shown, when the first switching unit 84 is positioned in a rotational position where the planar portion 842 extends parallel to the long axis A1 (i.e., orthogonal to the vertical direction) and the curved portion 843 protrudes upward toward the planar portion 842, the force-applying member 71 applies upward force to the rear end of the support body 13 via the partition member 73. Hereinafter, the rotational position of the first switching unit 84 at this time will be referred to as the release position.

[0100] More specifically, by applying force to the partition member 73 relative to the gear housing 12 via the force-applying member 71, the second abutment portion 735 abuts against the abutment portion 133 of the support body 13 from below, thereby pushing the rear end of the support body 13 upward (i.e., applying force to the support body 13 in the direction in which the tip of the blade 91 swings downward). Furthermore, as described above, the rear end of the support body 13 is subjected to force by the two force-applying members 63 of the trajectory mechanism 6 (see reference 63). Figure 3A downward force is applied, but the upward force applied by the two force-applying components 71 is set to be greater than the force applied by the force-applying component 63. The partition component 73 is held at the uppermost position where the first abutting portion 731 abuts against the flat portion 842 of the cam portion 841, and the rear end of the support body 13 is held at the uppermost position where the upper wall of the support body 13 approximately abuts against the upper wall of the gear housing 12. Thus, the first switching portion 84 enables the force-applying mechanism 7 to operate in the released position.

[0101] like Figures 12-15 As shown, when the first switching part 84 is positioned in a rotational position where the flat part 842 is orthogonal to the long axis A1 (i.e., extending in the vertical direction) and the curved part 843 protrudes behind the flat part 842, the corners of the flat part 842 and the curved part 843 of the cam part 841 press down on the first abutment part 731 of the partition member 73 from above, and the partition member 73 is held in a predetermined position while the force-applying member 71 is compressed. Hereinafter, the rotational position of the first switching part 84 at this time will be referred to as the first partition position. The vertical position of the partition member 73 at this time will be referred to as the partition position.

[0102] When the partition member 73 is in the partition position, even if the rear end of the support body 13 moves to its maximum downward position, the second abutment portion 735 of the partition member 73 is still positioned in a position separated from the support body 13 in the downward position (see reference). Figure 16 Therefore, the force applied by the force-applying component 71 will not act on the support body 13. In other words, the isolation component 73 isolates the force applied by the force-applying component 71 to the support body 13. Thus, the first switching part 84 prevents the force-applying mechanism 7 from operating in the first isolation position.

[0103] like Figure 3 , Figures 5-7 As shown, when the first switching part 84 is configured in a rotational position where the flat part 842 extends parallel to the long axis A1 (i.e., orthogonal to the vertical direction) and the curved part 843 protrudes downward toward the flat part 842, a pair of cam parts 841 press down on a pair of first abutment parts 731 of the partition member 73 from above, and the partition member 73 is held in the partitioned position while the force-applying member 71 is compressed. Hereinafter, the rotational position of the first switching part 84 at this time will be referred to as the second partitioned position. Even when the rear end of the support body 13 moves downward to its maximum extent, the second abutment part 735 of the partition member 73 is still configured in a position where it is separated from the support body 13 at the bottom (see reference). Figure 4 The partition member 73 blocks the force applied by the force-applying member 71 to the support body 13. Thus, the first switching part 84 also prevents the force-applying mechanism 7 from operating in the second partition position.

[0104] The details of the second switching unit 85 will be explained below.

[0105] As Figure 3 , Figures 5-6 illustrated, the second switching portion 85 is a cam portion provided at a central portion of the switching shaft 83 in the left-right direction. More specifically, the second switching portion 85, like the cam portion 841 of the first switching portion 84, is a cam portion having a substantially semilunar (semicircular) cross section. The outer surface of the second switching portion 85 includes a flat portion 852 containing the rotation axis A4 and a curved portion 853 that is circular arc-shaped. The flat portion 852 is in the same plane as the flat portion 842 of the cam portion 841 of the first switching portion 84. In addition, the radius of the second switching portion 85 (cam portion) is set to be smaller than the radius of the cam portion 841. The length of the second switching portion 85 in the left-right direction is set to be slightly larger than the width of the abutting portion 133 of the support body 13 in the left-right direction.

[0106] As Figure 3 , Figures 5-6 illustrated, in the case where the second switching portion 85 is disposed at a rotational position at which the flat portion 852 extends in parallel with the major axis Al (i.e., orthogonal to the up-down direction) and the curved portion 853 protrudes downward of the flat portion 852, the abutting portion 133 of the support body 13 does not come into contact with the second switching portion 85 even if the rear end portion of the support body 13 is moved maximally downward (refer to Figure 3 , Figure 4 ). Hereinafter, the rotational position of the second switching portion 85 at this time is referred to as a non-contact position. When the second switching portion 85 is in the non-contact position, the rear end portion of the support body 13 is able to move downward to a position at which the bearing 145 comes into abutment with the upper end surface (cam surface) of the cam portion 46 of the crank plate 45 throughout the entire process of one rotation of the crank plate 45 (refer to Figure 4 ). Thus, the second switching portion 85 completely permits the operation of the track mechanism 6 at the non-contact position.

[0107] As Figures 12-15 illustrated, in the case where the second switching portion 85 is disposed at a rotational position at which the flat portion 852 is orthogonal to the major axis Al (i.e., extends in the up-down direction) and the curved portion 853 protrudes rearward of the flat portion 852, the corner portion of the flat portion 852 and the curved portion 853 comes into abutment with the abutting portion 133 of the support body 13 from below during at least a part of the process of one rotation of the crank plate 45 (refer to Figure 16 ). Hereinafter, the rotational position of the second switching portion 85 at this time is referred to as a first abutment position. The second switching portion 85 comes into abutment with the abutting portion 133 of the support body 13 at the first abutment position, thereby being able to prohibit the rear end portion of the support body 13 from moving further downward.

[0108] Accordingly, during at least a part of the rotation of the crank plate 45, the bearing 145 cannot abut against the upper end surface of the cam portion 46. Thus, the support body 13 slightly swings in the up-down direction as the slide 5 moves in the front-rear direction, but the trajectory movement of the blade 91 is smaller than in the case where the second switching portion 85 is in the non-contact position. In this way, the second switching portion 85 partially obstructs the operation of the trajectory mechanism 6 in the first abutment position.

[0109] As Figures 8-11 illustrated, in the case where the second switching portion 85 is disposed in a rotation position in which the flat portion 852 extends in parallel with the long axis Al (i.e., orthogonal to the up-down direction) and the curved portion 853 protrudes upward of the flat portion 852, during at least a part of the rotation of the crank plate 45, the most protruding portion of the curved portion 853 abuts against the abutment portion 133 of the support body 13 from below (see FIG. 17). Hereinafter, the rotation position of the second switching portion 85 at this time is referred to as a second abutment position. As in the first abutment position, the second switching portion 85 abuts against the abutment portion 133 of the support body 13 in the second abutment position, and the further downward movement of the rear end portion of the support body 13 is prohibited. Figure 19

[0110] Accordingly, during at least a part of the rotation of the crank plate 45, the bearing 145 cannot abut against the upper end surface of the cam portion 46 (see FIG. 17). In this way, the second switching portion 85 also partially obstructs the operation of the trajectory mechanism 6 in the second abutment position. Figure 19

[0111] The operation of the reciprocating saw 1 in the first to third operation modes will be described below.

[0112] First, the operation when the first operation mode is selected will be described.

[0113] The user disposes the switching lever 81 in a rotation position corresponding to the first operation mode (hereinafter, referred to as a first rotation position). In the present embodiment, as Figure 9 illustrated, the rotation position corresponding to the first operation mode is a position in which the top end of the switching lever 81 faces the front. When the switching lever 81 is disposed in the first rotation position, the first switching portion 84 is disposed in the release position, and thus the biasing mechanism 7 can operate. In addition, the second switching portion 85 of the switching shaft 83 is disposed in the second abutment position, and thus the operation of the trajectory mechanism 6 is partially obstructed.

[0114] The slide 5 reciprocates along the drive axis A2 of the support body 13 as the crank plate 45 rotates by the driving of the motor 31.

[0115] ​​As described above, in the first operating mode, the force-applying member 71 applies upward force to the abutment portion 133 through the second abutment portion 735 of the partition member 73, thereby applying force to the support body 13 in the direction that causes the blade tip 913 of the blade 91 to swing downward.

[0116] Therefore, when the cutting tip 913 of the insert 91 is not pressed against the workpiece, that is, when no load is applied to the insert 91 in a direction that causes the cutting tip 913 to move upward (also known as the no-load state), such as Figure 8 As shown, when slider 5 is in the first slider position, the rear end of support body 13 is positioned at the uppermost position. The abutment portion 133 is located above the second switching portion 85. At this time, bearing 145 is located above the upper end surface of the thickest part of the cam portion 46 of crank plate 45. Furthermore, as... Figure 17 As shown, when slider 5 is in the second slider position, the rear end of support body 13 is also positioned at the uppermost position. The abutment portion 133 is located above the second switching portion 85.

[0117] On the other hand, when the tip 913 of the blade 91 is pressed onto the workpiece, that is, when a load is applied to the blade 91 in a direction that causes the tip 913 to move upward (also known as a load state), the rear end of the support body 13 resists the applied force of the force-applying member 71 and is able to swing downward while pressing down the partition member 73.

[0118] More specifically, such as Figure 18 As shown, when slider 5 is in the first slider position, the rear end of support 13 can swing downwards to a position where bearing 145 abuts against the upper end face of the thickest part of cam 46. Additionally, as... Figure 19 As shown, when the slider 5 is in the second slider position, the rear end of the support body 13 can swing downwards to the position where the abutment portion 133 abuts against the second switching portion 85 (the protruding end of the curved surface 853). That is, in the first operating mode, the cam portion 46 and the second switching portion 85 define the amount of swing (vertical movement) of the support body 13 and the slider 5 in the direction opposite to the force application direction of the force application member 71. In other words, in the first operating mode, the cam portion 46 and the second switching portion 85 restrict the swing of the support body 13 in the direction that causes the blade tip 913 to swing upwards.

[0119] When the cutting operation of the reciprocating saw 1 on the workpiece is started, the tip 913 of the blade 91 is pressed against the workpiece. At this time, the workpiece generates a reaction force upward against the blade 91. In particular, when pressed against a relatively hard workpiece, the blade 91 can jump upward due to the reaction force. In contrast, in the first operation mode, since the force applying member 71 exerts a force on the support body 13 in a direction in which the blade 91 swings downward, the jumping of the blade 91 can be effectively suppressed. In addition, when the user presses the blade 91 against the workpiece and the force applying member 71 is elastically deformed to some extent, as described above, the cam portion 46 and the second switching portion 85 restrict the swinging of the support body 13. Accordingly, the user can firmly press the tip 913 against the workpiece.

[0120] Next, the operation when the second operation mode is selected will be described.

[0121] The user arranges the switching lever 81 at a rotational position (hereinafter referred to as a second rotational position) corresponding to the second operation mode. In the present embodiment, as shown in FIG. 8, the rotational position corresponding to the second operation mode is a position in which the tip end of the switching lever 81 faces upward. When the switching lever 81 is arranged at the second rotational position, the first switching portion 84 is arranged at the first blocking position, whereby the force applying mechanism 7 cannot operate. In addition, by arranging the second switching portion 85 of the switching shaft 83 at the first abutting position, the operation of the trajectory mechanism 6 can be partially obstructed. Figure 13

[0122] According to the rotation of the crank plate 45 driven by the motor 31, the slider 5 reciprocates along the drive axis A2 of the support body 13. Since the blocking member 73 is held at the blocking position by the first switching portion 84, the second abutting portion 735 is always separated from the abutting portion 133 of the support body 13 downward regardless of the operation of the slider 5 during this period.

[0123] On the other hand, as shown in FIG. 9, when the slider 5 is positioned at the first slider position, the second switching portion 85 is positioned at a position lower than the abutting portion 133, and the bearing 145 abuts against the thickest portion of the cam portion 46. As shown in FIG. 10, when the slider 5 is positioned at the second slider position, the second switching portion 85 abuts against the abutting portion 133 from below to inhibit the rear end portion of the support body 13 from moving downward, and thus the bearing 145 is separated from the thinnest portion of the cam portion 46 upward. Figure 12 Figure 16 Accordingly, during the reciprocation of the slider 5, the swinging of the support body 13 in the vertical direction is relatively small, and the blade 91 performs a relatively small trajectory movement.

[0124] Next, the operation when the third operation mode is selected will be described.

[0125] ​​The user arranges the switch lever 81 in a rotational position corresponding to the third operation mode (hereinafter, referred to as a third rotational position). In the present embodiment, as shown in FIG. 8, the rotational position corresponding to the third operation mode is a position in which the tip end of the switch lever 81 is directed toward the rear. When the switch lever 81 is arranged in the third rotational position, the first switch portion 84 is arranged in the second blocking position, whereby the urging mechanism 7 cannot operate. In addition, by arranging the second switch portion 85 of the switch shaft 83 in the non-contact position, the operation of the trajectory mechanism 6 can be completely permitted. Figure 5

[0126] According to the rotation of the crank plate 45 driven by the motor 31, the slider 5 reciprocates along the drive axis A2 of the support body 13. As in the second operation mode, since the blocking member 73 is held in the blocking position by the first switch portion 84, the second abutting portion 735 is always separated from the abutting portion 133 of the support body 13 below, regardless of the operation of the slider 5 during this period.

[0127] On the other hand, as shown in FIG. 9, when the slider 5 is positioned at the first slider position, the second switch portion 85 is positioned at a position lower than the abutting portion 133, and the bearing 145 abuts against the thickest portion of the cam portion 46. As shown in FIG. 10, when the slider 5 is positioned at the second slider position, the second switch portion 85 is also positioned at a position lower than the abutting portion 133, and the rear end portion of the support body 13 is urged downward by the urging member 63, and the bearing 145 abuts against the thinnest portion of the cam portion 46. Thus, during the reciprocation of the slider 5, the support body 13 swings in the vertical direction, and the blade 91 performs a trajectory motion greater than that in the second operation mode. Figure 3 Figure 4

[0128] As described above, in the present embodiment, the user rotates the switch lever 81 manually, and can switch the state of the urging member 71 via the first switch portion 84. Thus, as described above, for example, in a case where a large reaction force from the workpiece is expected, the first operation mode can be selected by the switch lever 81, and the urging member 71 can be brought into a state in which the support body 13 can be urged. On the other hand, in a case where a small reaction force from the workpiece is expected, the second operation mode or the third operation mode can be selected by the switch lever 81, and the urging member 71 can be brought into a state in which the support body 13 cannot be urged. In a case where the urging member 71 is in a state in which the support body 13 cannot be urged, the rear end portion of the support body 13 is not urged upward with respect to the main body case 11 (the gear case 12). Thus, the swing amount until the rear end portion of the support body 13 is prohibited from moving downward is smaller than that in the first operation mode. Therefore, the user can easily press the blade tip 913 firmly against the workpiece. In this way, according to the reciprocating saw 1 of the present embodiment, the user can manually operate the switch lever 81 according to the work condition, and bring the urging member 71 into an appropriate state. ​​​

[0129] Further, in the present embodiment, the first switching section 84 is a cam section 841 provided on the switching shaft 83 which is connected to the switching lever 81 in a movable manner and rotates in accordance with the rotational operation of the switching lever 81. The cam section 841 selectively comes into abutment with the partition member 73 in accordance with the rotation of the switching shaft 83, and moves the partition member 73 to the partition position. Thus, the state of the urging member 71 can be switched easily by moving the partition member 73 with the simple structure of the switching shaft 83 having the cam section 841.

[0130] Further, in the present embodiment, the urging member 71 is a compression coil spring, and the partition member 73 is disposed between the support body 13 and the compression coil spring in a manner movable in the up-and-down direction. Further, the cam section 841 selectively holds the partition member 73 in the partition position separated from the support body 13, or allows the partition member 73 to come into abutment with the support body 13 in accordance with the rotational operation of the switching lever 81. In the case where the partition member 73 is allowed to come into abutment with the support body, the urging member 71 (compression coil spring) urges the support body 13 via the partition member 73. Thus, in the present embodiment, a relatively simple and reasonable structure can be realized in which the state of the urging member 71 (compression coil spring) can be switched using the urging member 71 (compression coil spring) and the partition member 73. Further, both the urging member 71 and the partition member 73 are supported by the support pin 123. Thus, a compact and simple support structure of the urging member 71 and the partition member 73 is realized.

[0131] Further, in the reciprocating saw 1 of the present embodiment, the user rotates the switching lever 81 manually, and can not only switch the state of the urging mechanism 7, but also switch the state (amount of trajectory movement of the blade 91) of the trajectory mechanism 6 via the second switching section 85. The trajectory movement of the blade 91 can improve the cutting efficiency, but also has a side that is not suitable for a relatively hard metal workpiece. Thus, the user can manually operate the switching lever 81 according to the work situation, and make the trajectory mechanism 6 into an appropriate state. Accordingly, the convenience of the reciprocating saw 1 is further improved.

[0132] Further, in the present embodiment, the second switching section 85 for switching the state of the trajectory mechanism 6 is a cam section of the same switching shaft 83 as the first switching section 84 for switching the state of the urging member 71. Further, the switching lever 81 is disposed at any one of the first rotational position, the second rotational position, and the third rotational position, and thereby selectively switches the state of the urging member 71 and the state of the trajectory mechanism 6. That is, the user can select an appropriate combination from at least three combinations (the first operation mode, the second operation mode, and the first operation mode) of the state of the urging member 71 and the state of the trajectory mechanism 6 by manually rotating the switching lever 81.

[0133] Further, in the present embodiment, the crank plate 45 having the crank pin 451 and the cam portion 46 is used, and a reasonable mechanism that enables the blade 91 to perform the trajectory motion while the slider 5 is reciprocated is realized. Further, by the simple structure of the single switching shaft 83, the first switching portion 84 (cam portion 841) and the second switching portion (cam portion) 85 provided on the switching shaft 83, respectively, it is possible to switch the state of the biasing member 71 and the state of the trajectory mechanism 6.

[0134] The following shows the correspondence between each of the components of the present embodiment and each of the components of the present disclosure or the present invention. However, each of the components of the present embodiment is only an example, and each of the components of the present disclosure is not limited to the example. The reciprocating saw 1 is an example of a "reciprocating power tool". The main housing 11 and the gear housing 12 are each an example of a "housing". The long axis Al is an example of a "first axis". The support body 13 is an example of a "support body". The slider 5 is an example of a "slider". The blade 91 and the blade tip 913 are each an example of a "blade" and a "blade tip", respectively. The motor 31 is an example of a "motor". The drive mechanism 4 is an example of a "drive mechanism". The biasing member 71 is an example of a "first biasing member". The switching lever 81 is an example of a "manual operation member". The switching mechanism 8 (in detail, the switching shaft 83 and the first switching portion 84) is an example of a "first switching mechanism".

[0135] The partition member 73 is an example of a "partition member". The switching shaft 83 is an example of a "movable member". The cam portion 841 is an example of a "cam portion". The trajectory mechanism 6 is an example of a "trajectory mechanism". The switching mechanism 8 (in detail, the switching shaft 83 and the second switching portion 85) is an example of a "second switching mechanism". The switching shaft 83 is an example of a "common shaft". The first switching portion 84 (cam portion 841) is an example of a "first switching portion". The second switching portion 85 is an example of a "second switching portion". The cam portion 841 is an example of a "first cam portion". The second switching portion 85 (cam portion) is an example of a "second cam portion". The crank plate 45 and the crank pin 451 are each an example of a "crank plate" and a "crank pin", respectively. The cam portion 46 is an example of a "third cam portion". The biasing member 63 is an example of a "second biasing member". The cam portion 46 and the second switching portion 85 are each an example of an "abutting portion". The biasing member 71 is an example of a "compression coil spring". The support pin 123 is an example of a "common support member".

[0136] Further, the above-described embodiment is only an example, and the reciprocating power tool related to the present disclosure is not limited to the example of the reciprocating saw 1. For example, the following example modifications can be added. Further, these modifications can be adopted by combining at least one of the modifications with the features described in the reciprocating saw 1 or each technical solution shown in the embodiment.

[0137] For example, the reciprocating power tool of the present disclosure can also be configured as a jigsaw. The reciprocating saw 1 can also not use the battery 93, but instead operate using electric power supplied from an external AC power source via a power cord. The motor 31 can also be an AC motor. Alternatively, the motor 31 can be a motor with a brush.

[0138] The mechanism that reciprocates the blade 91 is not limited to the drive mechanism 4. Any known mechanism can be used as long as it can convert the rotational motion of the motor shaft 315 into linear reciprocating motion and transmit it to the blade 91. For example, the motion conversion can also use a swing member that swings in conjunction with the rotation of a rotating body (so-called swash bearing). Alternatively, the crank pin of the crank plate can be connected to the slider 5 via a link. The combination and arrangement of various shafts, gears can also be appropriately changed.

[0139] Likewise, the mechanism that causes the blade 91 to perform trajectory motion is not limited to the trajectory mechanism 6. Any known mechanism can be used as long as it can act on the support body 13 or the slider 5 to cause the blade 91 to perform trajectory motion. For example, a member that is movably connected to the support body 13 and swings the support body 13 can be provided separately from the crank plate 45. Alternatively, the trajectory mechanism 6 can be omitted. That is, the reciprocating saw 1 can have only the first operation mode and an operation mode in which the blade 91 is linearly reciprocated in the front-rear direction. Alternatively, the reciprocating saw 1 can have only the first operation mode and the third operation mode. That is, the reciprocating saw 1 can be able to perform only one type of trajectory motion. In this case, the second switching portion 85 for changing the operation of the trajectory mechanism 6 is omitted. Alternatively, the second operation mode can be an operation mode in which the blade 91 is linearly reciprocated in the front-rear direction. That is, the second switching portion 85 can be configured to selectively enable or disable the operation of the trajectory mechanism 6.

[0140] Alternatively, the arrangement of the motor 31, the drive mechanism 4, and the slider 5 inside the main body case 11 is not limited to the example of the above-described embodiment. For example, the motor 31 can be arranged such that the rotational axis of the motor shaft 315 intersects the long axis Al of the main body case 11. The crank plate 45 can be arranged to be rotatable about a rotational axis extending in the left-right direction, and the slider 5 can be arranged on the right side or the left side of the crank plate 45.

[0141] The shape, constituent members, connection method, and the like of the main body case 11 and the handle 18 are not particularly limited and can be appropriately changed. Likewise, the gear case 12 arranged inside the main body case 11 can also be appropriately changed in accordance with changes in the drive mechanism 4, the slider 5, and the like arranged inside the gear case 12 or independently of such changes. Alternatively, a case in which the gear case 12 is exposed to the outside can also be used.

[0142] The shape, constituent members, connection method to the drive mechanism 4, and the like of the slider 5 are not particularly limited and can be appropriately changed. For example, the slider 5 can not be cylindrical but, for example, prismatic. The slider 5 can also be formed by connecting a plurality of members.

[0143] The support structure of the slider 5 is not limited to the support body 13. For example, in the above-described embodiment, the support body 13 extends in the front-rear direction within the gear housing 12 and has the same length as the main body 51 of the slider 5. However, the length and shape of the support body 13 can be appropriately changed as long as the support body 13 supports the slider 5 in such a manner that the slider 5 can move linearly with respect to the support body 13.

[0144] For example, in the above-described embodiment, the support body 13 is connected to the gear housing 12 via the pin 141 and can swing in the up-down direction about the axis of the pin 141. However, the support body 13 need not be connected to the gear housing 12 but can be housed in the gear housing 12 in such a manner that it can swing in the up-down direction. That is, the support body 13 can swing within the gear housing 12 with a part of the support body 13 as a fulcrum. In this case, a member that guides the swinging of the support body 13 and / or the slider 5 can also be arranged within the gear housing 12. Also, the support body 13 can be housed in the gear housing 12 in such a manner that it can move in the up-down direction and be integrally urged downward by an urging member (for example, an elastic body formed of rubber, various springs, a synthetic resin having elasticity (for example, a polyurethane foam), felt, or the like).

[0145] In the above-described embodiment, in the third operation mode, the cam portion 46 and the second switching portion 85 regulate the movement amount of the support body 13 and the slider 5 in the up-down direction. However, instead of the cam portion 46 and the second switching portion 85, an abutting portion that is configured to regulate the movement amount of the support body 13 and the slider 5 in the up-down direction by abutting against the support body 13 or the slider 5 can be additionally provided within the gear housing 12.

[0146] The kind, number, arrangement, and the like of the urging member 71 for urging the support body 13 or the slider 5 are not particularly limited and can be appropriately changed. For example, the urging member 71 can employ a spring other than a compression coil spring (for example, a tension coil spring, a leaf spring, a torsion spring), rubber, a synthetic resin having elasticity (for example, a polyurethane foam), or an elastic body formed of felt or the like. In addition, the urging member 71 can be provided only one or three or more.

[0147] In the above-described embodiment, the force applying member 71 applies force to the slider 5 indirectly by applying force to the support body 13. Instead of this, the force applying member 71 can be configured to apply force to the slider 5 directly or via a member other than the support body 13 (for example, the partition member 73). In addition, in the case where the support body 13 and the slider 5 swing in the up-and-down direction, the force applying member 71 can apply force to the front end portion of the support body 13 or the slider 5 downward instead of applying force to the rear end portion of the support body 13 or the slider 5 upward. In addition, at least one force applying member 71 can apply force to the rear end portion of the support body 13 or the slider 5 upward, and another at least one force applying member can apply force to the front end portion of the support body 13 or the slider 5 downward.

[0148] The configuration for partitioning the force applied by the force applying member 71 can also be changed as appropriate. For example, instead of the partition member 73, a member that, in accordance with the rotational operation of the switch lever 81, comes into contact with the rear end portion of the support body 13 or the rear end portion of the slider 5 from above to hinder the swinging of the support body 13 and the slider 5 can be used.

[0149] The switch lever 81 and the switching mechanism 82 can also be changed as appropriate. In addition, for example, instead of the rotational switch lever 81, an operation member configured to be moved linearly by a user by manual operation can be used. According to this change, instead of the switch shaft 83, a movable member that moves linearly in accordance with the linear movement of the operation member can be used. This movable member can also be configured to partition the applied force of the force applying member 71 by moving the partition member 73 as in the above-described embodiment. Alternatively, the partition member 73 can be omitted, and the movable member itself can be configured to partition the applied force of the force applying member 71. The configuration of the first switching portion 84 and the second switching portion 85 on the switch shaft 83, the shape and size of each cam portion can also be changed. For example, the flat portion 842 of the first switching portion 84 and the flat portion 852 of the second switching portion 85 can be arranged in a crosswise manner. In addition, the radius of the cam portion 841 and the radius of the second switching portion (cam portion) 85 can be the same.

Claims

1. A reciprocating power tool characterized by comprising a housing, a support body, a slide, a motor, a drive mechanism, a first force applying member, a manual operation member, and a first switching mechanism, wherein the housing has a first axis line which defines a front-rear direction of the reciprocating power tool; the support body is supported to the housing; the slide is supported to the support body in a manner that it can move linearly, and has a front end portion to which a blade having a blade tip can be attached; the drive mechanism is configured to be connected to the slide in a manner that it can act, and to make the slide reciprocate relative to the support body by power of the motor; the first force applying member is configured to selectively apply force to the slide; the first switching mechanism is configured to be connected to the manual operation member in a manner that it can act, and to selectively set that the first force applying member can apply force to the slide or the first force applying member cannot apply force to the slide in accordance with manual operation of the manual operation member, in an up-down direction orthogonal to the first axis line, a direction in which the blade tip of the blade faces when the reciprocating power tool is normally used is defined as the lower side, when set to be able to apply force by the first switching mechanism, the first force applying member applies force to the slide in a manner that the front end portion of the slide faces the lower side.

2. A reciprocating power tool characterized by comprising a housing, a support body, a slide, a motor, a drive mechanism, a first force applying member, a manual operation member, and a first switching mechanism, wherein the housing has a first axis line which defines a front-rear direction of the reciprocating power tool; the support body has a second axis line, and extends substantially in the front-rear direction within the housing to be supported to the housing in a manner that it can swing in an up-down direction orthogonal to the first axis line; the slide is an elongated slide which is supported to the support body in a manner that it can move linearly along the second axis line, and has a front end portion to which a blade having a blade tip can be attached; the drive mechanism is configured to be connected to the slide in a manner that it can act, and to make the slide reciprocate relative to the support body along the second axis line by power of the motor; the first force applying member is configured to selectively apply force to the support body; the first switching mechanism is configured to be connected to the manual operation member in a manner that it can act, and to selectively set that the first force applying member can apply force to the support body or the first force applying member cannot apply force to the support body in accordance with manual operation of the manual operation member, in the up-down direction, a direction in which the blade tip of the blade faces when the reciprocating power tool is normally used is defined as the lower side, when set to be able to apply force by the first switching mechanism, the first force applying member applies force to the support body in a first direction in which a front end portion of the support body swings toward the lower side.

3. The reciprocating power tool according to claim 1 or 2, characterized in that ​ ​ ​ ​ Further provided is a blocking member configured to selectively block the application of force by the first force application member, The first switching mechanism is configured to selectively cause the blocking member to block the application of force in accordance with manual operation of the manual operation member.

4. The reciprocating power tool according to claim 3, wherein The first switching mechanism includes a movable member configured to selectively move the blocking member to a blocking position that blocks the application of force by the first force application member through movement in accordance with the manual operation.

5. The reciprocating power tool according to claim 4, wherein The movable member is a shaft that is operatively connected to the manual operation member and is rotatable in accordance with manual operation of the manual operation member, The shaft has a cam portion configured to selectively abut against the blocking member and move the blocking member to the blocking position in accordance with rotation of the shaft.

6. The reciprocating power tool according to claim 1 or 2, further comprising a trajectory mechanism and a second switching mechanism, wherein The trajectory mechanism is configured to selectively cause the blade to perform a trajectory motion by causing the slider to oscillate in the up-and-down direction during reciprocation of the slider by the drive mechanism, The second switching mechanism is configured to selectively change the operation of the trajectory mechanism in accordance with manual operation of the manual operation member by being operatively connected to the manual operation member.

7. The reciprocating power tool according to claim 6, wherein The first switching mechanism and the second switching mechanism include a common shaft that is operatively connected to the manual operation member and is rotatable in accordance with manual operation of the manual operation member, The first switching mechanism includes a first switching portion provided on the common shaft and configured to selectively set the first force application member to be able to apply force or not to be able to apply force in accordance with rotation of the common shaft, The second switching mechanism includes a second switching portion provided on the common shaft and configured to selectively change the operation of the trajectory mechanism in accordance with rotation of the common shaft.

8. The reciprocating power tool according to claim 7, wherein The manual operation member is rotatable to at least a first rotational position, a second rotational position, and a third rotational position, The first switching portion sets the first force application member to be able to apply force when the manual operation member is disposed at the first rotational position, and sets the first force application member to be not able to apply force when the manual operation member is disposed at the second rotational position and when the manual operation member is disposed at the third rotational position, The second switching portion changes the operation of the trajectory mechanism at least when the manual operation member is disposed at the second rotational position and when the manual operation member is disposed at the third rotational position.

9. The reciprocating power tool according to claim 8, wherein ​ Further provided is a partition member that is interposed between the support body and the first force applying member, The first and second switching portions are configured as first and second cam portions, The drive mechanism includes a crank plate that is disposed on the lower side of the rear end portion of the support body and is driven to rotate about a rotation axis extending in the up-down direction by the power of the motor, the crank plate having a crank pin that is fixed to a position eccentric from the rotation axis and is connected to the slider in an operable manner, The track mechanism includes a third cam portion and a second force applying member, The third cam portion is a circular ring-shaped protruding portion provided to the crank plate, configured to protrude upward from the upper surface of the crank plate and have a thickness in the up-down direction that varies in the circumferential direction around the rotation axis, The second force applying member applies a force to the rear end portion of the support body in a direction in which the third cam portion abuts, The first cam portion releases the partition member from a partition position that partitions the application of the force of the first force applying member when the manual operation member is disposed in the first rotational position, and abuts against the partition member to hold the partition member in the partition position when the manual operation member is disposed in the second rotational position and in the third rotational position, The second cam portion abuts against the support body to hinder the rear end portion of the support body from abutting against the third cam portion at least for a certain period of time during one rotation of the crank plate when the manual operation member is disposed in the second rotational position, and The second cam portion allows the rear end portion of the support body to abut against the third cam portion throughout a period during one rotation of the crank plate when the manual operation member is disposed in the third rotational position.

10. The reciprocating power tool according to claim 1 or 2, wherein The support body is swingable about an axis extending in a left-right direction with respect to the housing, the left-right direction being orthogonal to the front-rear direction and the up-down direction.

11. The reciprocating power tool according to claim 1 or 2, wherein Further provided is an abutment portion configured to regulate the amount of movement of the slider in a second direction by abutting against the support body or the slider, the second direction being opposite to the direction of the force applied by the first force applying member.

12. The reciprocating power tool according to claim 1 or 2, wherein The first force applying member is a compression coil spring disposed between the support body and the housing in the up-down direction.

13. The reciprocating power tool according to claim 12, wherein Further provided is a partition member disposed between the support body and the compression coil spring in a movable manner in the up-down direction, The first switching mechanism is configured to selectively hold the partition member in a partition position in which the partition member is separated from the support body, or allow the partition member to abut against the support body, in accordance with manual operation of the manual operation member. The compression coil spring exerts a force on the support body via the partition member when the partition member is allowed to abut against the support body.

14. The reciprocating power tool according to claim 13, wherein The compression coil spring and the partition member are supported by a common support member that extends in the up-down direction.

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