Auxiliary base and jig saw

Abstract

To provide an auxiliary base which can further improve stability during cutting of a jig saw as necessary, and a jig saw with the same.SOLUTION: An auxiliary base 1 can be attached to a base part 6 of a jig saw J which can contact a workpiece W. The auxiliary base 1 includes a second protrusion 116 as a contactable part that can contact the workpiece W when the auxiliary base is attached. The jig saw J includes a body part 2. The body part 2 is tiltable in a right and left direction relative to the base part 6. The auxiliary base 1 is attached to the base part in which an auxiliary width WA that is a distance from the second protrusion 116 to a center of the base part 6 in the right and left direction is larger than a width WB of the base part 6 in the right and left direction.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a jigsaw that cuts a workpiece with a blade, and an auxiliary base thereof. [Background technology]

[0002] A jigsaw as disclosed in JP 2013-144334 A (Patent Document 1) is known. This jigsaw has a main body and a forked base connected to the bottom of the main body. The base has an auxiliary base at the center of the forked portion. The auxiliary base can be moved in and out in a plane parallel to the bottom surface of the base between a stored position where it fits inside the base and a pulled-out position where it protrudes from the storage portion to the outside of the base. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2013-144334 A Summary of the Invention [Problem to be solved by the invention]

[0004] The size of the auxiliary base is limited because it is stored in the storage portion of the base, and therefore, with the jigsaw, there is a limit to how much stability can be improved during cutting. [Means for solving the problem]

[0005] This specification discloses an auxiliary base for a jigsaw. The auxiliary base may be attached to the jigsaw. The auxiliary base may have a contactable portion that is a portion that can contact a workpiece when attached. The jigsaw may have a base portion that can contact the workpiece. The jigsaw may have a main body portion. The main body portion may be tiltable in the left-right direction relative to the base portion. The auxiliary base may be attached in a state where an auxiliary width, which is the distance from the contactable portion to the center of the base portion in the left-right direction of the main body portion, is greater than the width of the base portion in the left-right direction. This specification also discloses an auxiliary base for a jigsaw. The auxiliary base may be attached to the jigsaw. The auxiliary base may have a contactable portion that is a portion that can contact a workpiece when attached. The jigsaw may have a base portion that can contact the workpiece. The jigsaw may have a main body portion. The main body portion may be tiltable in the left-right direction relative to the base portion. In the left-right direction of the main body portion, the contactable portion may be located on the inclined side of the main body portion, which is the side to which the main body portion is inclined, relative to the center of gravity of the jigsaw when the inclination angle of the main body portion is 45°. Further disclosed herein is a jigsaw, which may include an auxiliary base as described above. Effect of the Invention

[0006] The auxiliary base of the present disclosure can further improve the stability of the jigsaw during cutting, if necessary. The jigsaw of the present disclosure provides additional stability when cutting, if desired. [Brief description of the drawings]

[0007] [Figure 1] 1 is a perspective view of the front, top, and left sides of a jigsaw according to a first embodiment of an embodiment of the present disclosure with a body and a handle tilted to the right. FIG. [Diagram 2] FIG. 2 is a front view of the jigsaw of FIG. [Diagram 3] 2 is a front view of the jigsaw of FIG. 1 with the body and handle in an upright position. [Figure 4] 2 is an enlarged view of an auxiliary base and its surroundings in the jigsaw of FIG. 1. [Diagram 5] 2 is a central cross-sectional view of the auxiliary base of the jigsaw of FIG. 1. [Figure 6] 2 is a perspective view of the front, bottom and left side of the jigsaw of FIG. 1. FIG. [Figure 7] 4 is an exploded perspective view of the front, bottom and left sides of a base portion and an auxiliary base of the jigsaw of FIG. 3. [Figure 8] 13 is a central cross-sectional view of the auxiliary base when the cover plate is attached. FIG. [Figure 9] 13 is an enlarged view of the auxiliary base and its surroundings when the main body and the handle are tilted to the left. FIG. [Figure 10] FIG. 10A is a perspective view of an auxiliary base of a jigsaw according to a second embodiment of the present disclosure, and FIG. 10B is a perspective view of the auxiliary base from the opposite side to FIG. 10A. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] In one embodiment of the present disclosure, in the left-right direction of the main body, the contactable portion may be disposed on the inclined side of the main body, which is the side to which the main body is inclined, relative to the center of gravity of the jigsaw when the inclination angle of the main body is 45°. In this case, stability when the main body is inclined is improved. In one embodiment of the present disclosure, the jigsaw may include a battery and a battery mounting portion, which improves stability when the battery is mounted. In an embodiment of the present disclosure, the position of the auxiliary base relative to the base part in the left-right direction may be adjustable, in which case the support mode of the auxiliary base is adjustable according to the inclination angle.

[0009] In one embodiment of the present disclosure, the auxiliary base may be selectively detachable from both sides of the base in the left-right direction. In this case, the auxiliary base contributes to stabilizing the left and right sides of the jigsaw body when it is tilted. In one embodiment of the present disclosure, the contactable portion may be capable of selectively supporting both sides of the base in the left-right direction. In this case, the auxiliary base contributes to stabilizing both the left and right sides of the jigsaw body when it is tilted. In one embodiment of the present disclosure, the auxiliary base may have a head and legs. The legs may extend in the left-right direction. The legs may be attached to the base. The head may have a contactable portion. The head may be connected to the legs in a state in which a first distance, which is a distance from an upper surface to the legs in a vertical direction intersecting with the left-right direction, and a second distance, which is a distance from a lower surface to the legs in the vertical direction, are different from each other. In this case, the jigsaw can be stabilized even when a cover plate is attached to the base of the jigsaw.

[0010] In one embodiment of the present disclosure, the auxiliary base may be mountable to the ruler mount of the base, thereby improving the stability of existing jigsaws that have a ruler mount. In one embodiment of the present disclosure, the auxiliary base may be disposed forward of the blade of the main body in a front-rear direction intersecting with the left-right direction. In this case, even at the start of cutting when the blade is applied to the edge of the workpiece, the auxiliary base comes into contact with the workpiece prior to the blade, so sufficient stability is obtained.

[0011] In one embodiment of the present disclosure, the contactable portion may extend rearward in a front-to-rear direction intersecting with the left-to-right direction from the blade of the main body, which provides further stabilization of the jigsaw. In one embodiment of the present disclosure, the auxiliary base may further include a concave-convex portion. In this case, the concave-convex portion provides an anti-slip effect, making it easier to work with the jigsaw to which the auxiliary base is attached. In an embodiment of the present disclosure, the uneven portion may be surrounded by protruding portions having a height equal to or greater than the height of the uneven portion. In this case, the protruding portions suppress wear of the uneven portion. In one embodiment of the present disclosure, a plurality of uneven portions may be provided with different shapes, in which case the attachment mode of the auxiliary base can be more easily distinguished. EXAMPLES

[0012] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. The description includes modified examples of the embodiments. The present disclosure is not limited to the embodiments and the modified examples. The front, back, up, down, left and right in the embodiments and modified examples are defined for the convenience of explanation and may change depending on at least one of the work situation and the movement of parts.

[0013] Fig. 1 is a perspective view of the front, top, and left sides of a jigsaw J according to a first embodiment of the present disclosure, with a body 2 and a handle 4 tilted to the right. Fig. 2 is a front view of the jigsaw J. Fig. 3 is a front view of the jigsaw J with a body 2 and a handle 4 standing upright. Fig. 4 is an enlarged view of the auxiliary base 1 and its surroundings in Fig. 1. Fig. 5 is a central cross-sectional view of the auxiliary base 1. Fig. 6 is a perspective view of the front, bottom, and left sides of the jigsaw J. The jigsaw J has an auxiliary base 1, a main body 2, a handle 4, a base 6, and a rechargeable battery 8. The jigsaw J is a rechargeable type that is driven by the battery 8. The battery 8 is for a power tool. At least one of the handle 4 and the battery 8 may be treated as a component of the main body 2. At least one of the auxiliary base 1 and the battery 8 may be a component independent of the jigsaw J. The battery 8 may be a primary battery. The battery 8 does not have to be for a power tool, and may be, for example, a general-purpose battery. Furthermore, instead of the battery 8, a power cord connected to a power source may be used. A jigsaw having a power cord connected to an AC power source is an AC type.

[0014] 1, 2, 4 and 6, the body 2 and the handle 4 are depicted in a position tilted 45° to the right from the vertical relative to the base 6. The jigsaw J has a function for adjusting the position of the body 2 and the handle 4 relative to the base 6. In Fig. 3, the body 2 and the handle 4 are depicted in a vertical position, in other words, in an upright state. In Figure 2, the top of the figure is the top of the jigsaw J and the left of the figure is the right of the jigsaw J, according to the direction from the user's perspective of the jigsaw J. In Figure 5, the top of the figure is the top of the jigsaw J and the left of the figure is the left of the jigsaw J. However, for ease of explanation, the direction from the upper left to the lower right in Fig. 2 corresponds to the up-down direction of the main body 2 and the handle 4. Also, the direction from the lower right to the upper left in Fig. 2 corresponds to the left-right direction of the main body 2 and the handle 4. In other words, for ease of explanation, the orientation of the main body 2 and the handle 4 will be described below in the same direction as when they are standing vertically relative to the horizontal base 6 as shown in Fig. 3, rather than as shown in Figs. 1, 2, 4, and 6.

[0015] The main body 2 is generally "L" shaped when viewed from left to right. The front part of the main body 2, a front part 2F, extends vertically. The rear part of the main body 2, a rear part 2B, extends rearward from the lower rear side of the front part 2F. The main body 2 has a housing 10, an electric motor 12, a fan 14, a battery mounting section 18, a controller 20, a speed adjustment switch 22, a main power switch 26, a power transmission section 28, a slider 30 as an output section, a tool attachment section 32, a blade 34 as a tool, an orbital movement section 36, an orbital switching section 37, a counterweight section 38, and a guard 39. In the main body 2, from the rear, there are arranged a battery mounting section 18, a controller 20, an electric motor 12, a fan 14, a power transmission section 28, an orbital motion section 36, a counterweight section 38, a slider 30, a tool mounting section 32, and a guard 39. The arrangement of the various members and parts can be changed in various ways. The blade 34 may not be a component of the main body 2 or the jigsaw J, but may be an independent component from the main body 2 or the jigsaw J. The slider 30 may be a component of the power transmission unit 28, and the tool attachment unit 32 may be treated as an output unit. The slider 30 and the tool attachment unit 32 may be collectively treated as an output unit.

[0016] The housing 10 constitutes the outer shell of the main body portion 2 and the handle portion 4 . The housing 10 directly or indirectly holds various members. The housing 10 is split into a left half and a right half. The housing 10 can be modified in various ways. For example, the outer periphery of the main body 2 and the outer periphery of the handle 4 may be separate bodies that can be combined with each other in the housing 10. Also, in a half-split housing 10, at least one of the size and shape may be significantly different between the left and right halves. At least one of the materials of the various parts of the housing 10 and the number and arrangement of the openings may be changed.

[0017] The handle portion 4 has a main switch portion 40 and a lock-on switch 42. At least one of the main switch portion 40 and the lock-on switch 42 may be disposed in the body portion 2.

[0018] The main switch section 40 includes a main switch 46 and a trigger 48 . The main switch 46 is electrically connected to the controller 20 . The trigger 48 is fixed to the plunger of the main switch 46. A lower portion of the trigger 48 is exposed downward from an opening in the handle portion of the housing 10. The trigger 48 is slidable up and down, and can be operated upward by a user. When the trigger 48 is in the lowest position, the main switch 46 is off. When the trigger 48 is slid upward from the lowest position, the main switch 46 turns on after a predetermined amount of play. Furthermore, when the main switch 46 is slid further upward from the on state, the state of the signal it issues changes according to the amount of upward operation, and the number of rotations of the electric motor 12 is changed. The main switch 46 does not have to change the state of the signal it issues depending on the amount of upward operation of the trigger 48. Alternatively, the play may be omitted and the main switch 46 may be turned on immediately when the upward operation of the trigger 48 begins.

[0019] The lock-on switch 42 is a button switch that is switched by a user's pressing operation. The lock-on switch 42 is electrically connected to the controller 20. The type of at least one of the main switch 46 and the lock-on switch 42 can be changed in various ways. For example, the lock-on switch 42 may be a toggle switch instead of a button. The types of the other switches can also be changed in various ways.

[0020] The electric motor 12 is a brushless motor and a DC motor. The electric motor 12 is held in a housing 10. Since the housing 10 holds the electric motor 12, it can be considered as a motor housing. The electric motor 12 has a motor shaft 50 that extends in the front-rear direction. The motor shaft 50 rotates around its own imaginary central axis. A pinion portion 52 is formed at the front end of the motor shaft 50 .

[0021] The fan 14 is fixed integrally to the motor shaft 50 . The fan 14 is a centrifugal fan, although other fans such as an axial flow fan may also be used as the fan 14. The rear part of the lower opening of the housing 10 is disposed radially outward of the fan 14 .

[0022] The battery mounting section 18 is disposed at the lower rear end of the main body section 2 . The battery 8 is attached to the battery attachment portion 18. The battery attachment portion 18 has a main body side terminal that is connected to a terminal of the battery 8. The main body side terminal is disposed within a rear lower opening of the housing 10. The battery 8 is attached to the lower side of the battery attachment section 18. The battery 8 is attached by sliding it from the rear side to the front side of the battery attachment section 18. The sliding attachment direction of the battery 8 may be a direction other than the rear side to the front side. Furthermore, the battery 8 may be attached in a manner other than the sliding attachment. The battery 8 is an 18V (volt) lithium ion battery. The battery 8 includes eight cells (not shown) in a plastic battery case. The cells are cylindrical and elongated in the axial direction, and extend to the left and right when the battery 8 is attached. The battery 8 holds power for driving the electric motor 12. Any lithium ion battery of 10.8V, 14.4V, 25.2V, 28V, 36V, etc. may be used as the battery 8. A lithium ion battery with a voltage less than 10.8V or more than 36V may also be used as the battery 8. Other types of batteries may also be used as the battery 8. A plurality of batteries 8 may also be used.

[0023] The controller 20 is held inside the battery mounting section 18 . The controller 20 controls the electric motor 12. The electric motor 12 is electrically connected to the controller 20. Furthermore, the main body side terminal of the battery mounting portion 18 is electrically connected to the controller 20. In addition, a speed adjustment switch 22 and a main power switch 26 are electrically connected to the controller 20.

[0024] The speed adjustment switch 22 is a dial-type switch. The speed adjustment switch 22 has a disk portion that extends forward, backward, left and right. The disk portion of the speed adjustment switch 22 is rotatable around an imaginary central axis that extends up and down. The left portion of the disk portion of the speed adjustment switch 22 is exposed from a hole formed in the left surface of the housing 10. The user rotates the disk portion by moving the left portion of the disk portion forward or backward. The speed adjustment switch 22 outputs a signal according to the amount of rotation of the disk portion. The output signal is sent to the controller 20. The speed adjustment switch 22 may be omitted.

[0025] The main power switch 26 is a tactile switch and is held at the upper front portion of the housing 10. The main power switch 26 alternately sends an ON signal or an OFF signal to the controller 20 every time it is pressed by the user.

[0026] The power transmission unit 28 transmits the power of the electric motor 12 to the blade 34 via the slider 30 and the tool attachment unit 32. The slider 30 is cylindrical. The slider 30 extends vertically. The tool attachment unit 32 is held at the lower end of the slider 30. The slider 30 can reciprocate in the vertical direction. The tool attachment unit 32 can reciprocate in the vertical direction.

[0027] The slider 30 extends vertically and is movable up and down. The lower portion of the slider 30 is capable of swinging back and forth relative to the upper end portion of the slider 30 .

[0028] The tool attachment portion 32 is held by the slider 30. The tool attachment portion 32 is connected to the lower end portion of the slider 30. The blade 34 extends vertically and has a workpiece action portion that acts on the workpiece W on one longitudinal side. The workpiece action portion is, for example, a saw blade that cuts the workpiece W. The blade 34 is attached at its upper end to the tool attachment portion 32 with the workpiece action portion facing forward. The blade 34 is attached to the tool attachment portion 32 without using a tool such as a wrench, i.e., tool-less.

[0029] The orbital motion portion 36 contacts the rear edge of the blade 34 . The orbital motion portion 36 is swingable, and when swinging, applies a force in the forward and backward directions to the blade 34. When the swinging motion in the forward and backward directions is added to the up and down motion, the blade 34 performs orbital motion so as to trace an imaginary ellipse when viewed from right to left.

[0030] The orbital switching portion 37 has a shaft portion (not shown) and a knob portion (shown). The shaft portion is shaped like a shaft extending left and right, and is disposed inside the housing 10 . The knob portion is fixed to the left end portion of the shaft portion, and is disposed to the left of the left surface of the housing 10. The knob portion extends radially outward from the shaft portion. A user can rotate the orbital switching unit 37 around the virtual central axis of the shaft by operating the knob. By rotating the shaft of the orbital switching unit 37, the presence / absence and degree of swinging in the orbital motion unit 36 ​​can be switched.

[0031] The counterweight portion 38 has a counterweight (not shown). The counterweight of the counterweight portion 38 moves up and down in the opposite phase to the slider 30, the tool attachment portion 32, and the blade 34. Due to the reciprocating movement of the counterweight in the opposite phase, vibrations caused by the reciprocating movement of the slider 30, the tool attachment portion 32, and the blade 34 are suppressed.

[0032] The guard 39 extends vertically. An upper end of the guard 39 is held by the housing 10. A lower end of the guard 39 is adjacent to the upper surface of the base portion 6. The blade 34 is disposed behind the guard 39 .

[0033] FIG. 7 is an exploded perspective view of the front, bottom and left sides of the base portion 6 and the auxiliary base 1. FIG. The base portion 6 is disposed below the main body portion 2 and attached to the main body portion 2 . The base portion 6 has a base 60, a base plate 62, a plurality of (four) screws 63, a clamp plate 64, a bolt 66, and a cover plate C.

[0034] The base 60 is made of an aluminum die-cast alloy and has a plate shape that extends in all directions. The base 60 has a base body 70, a raised portion 71, a plurality of (four) screw holes 72, a ruler attachment portion 74, and a pressing bolt 75.

[0035] The base body 70 is plate-shaped. The front part of the base body 70 is bifurcated. The blade 34 can pass between the bifurcated parts of the base body 70. The raised portion 71 is disposed in the center of the base body 70. The raised portion 71 is raised upward relative to the base body 70. A cross hole 71X is formed in the center of the raised portion 71. The cross hole 71X is "+" shaped and extends both forward and backward and left and right. The portions of the cross hole 71X extending left and right are arc-shaped when viewed from the front to the rear. The screw holes 72 are disposed adjacent to each other at the four corners of the base body 70. Each screw hole 72 extends vertically.

[0036] The ruler mounting parts 74 are disposed at the front ends of the bifurcated part of the base body 70. The ruler mounting part 74 has a plurality (a pair) of holes 74H and a plurality (a pair) of screw holes 74S. Each hole 74H extends left and right, and one ruler (not shown) can be inserted into it. Each screw hole 74S extends up and down, and a holding bolt 75 for holding the ruler can be inserted from top to bottom into each of them. The ruler mounting part 74 can be fitted with a ruler. The ruler is, for example, a parallel ruler that guides the cutting of the jigsaw J parallel to the surface of the workpiece W. The pressing bolt 75 may be a component of a member of the base portion 6 other than the base 70, may be a component of the auxiliary base 1, or may be a component independent of the jigsaw J. Also, a plurality of pressing bolts 75 may be used.

[0037] The base plate 62 is made of metal, that is, a steel plate, and has a plate shape. By disposing the base plate 62 on the lower surface of the base portion 6, wear of the base portion 6 due to contact with the workpiece W is suppressed. The base plate 62 has a base plate body 80, a hole 82, a plurality of (four) screw holes 84, and a plurality of (three) bulging portions 88.

[0038] The base plate body 80 is plate-shaped. The front part of the base plate body 80 is bifurcated. The blade 34 can pass between the bifurcated parts of the base plate body 80. When viewed from below to above, the base plate body 80 has the same shape and size as the base body 70.

[0039] The hole 82 is disposed in the center of the base plate body 80. The hole 82 is disposed below the cross hole 71X of the base 60. The screw holes 84 are disposed adjacent to the four corners of the base plate body 80. The screw holes 84 extend vertically. The arrangement of the screw holes 84 is the same as the arrangement of the screw holes 72 of the base 60 when viewed from below to above.

[0040] Each bulge 88 bulges upward relative to the base plate body 80 by bending the base plate body 80 . One bulge 88 extends in the front-rear direction, extending from the front to the rear of the hole 82. This bulge 88 makes the cross section of the bulge 88 and its adjacent portion have an "Ω" shape when viewed from the rear side to the front. The other two bulges 88 extend forward and backward, respectively, and are disposed at the base portions of the bifurcated portion of the base plate body 80 . The formation of each bulge 88 improves the rigidity of the base plate 62. At least any of the bulges 88 may be omitted.

[0041] Each screw 63 is inserted into either the screw hole 72 of the base 60 or the corresponding screw hole 84 of the base plate 62. Each screw 63 connects the base 60 and the base plate 62 together.

[0042] The clamp plate 64 is plate-shaped. The cross section of the clamp plate 64 is arch-shaped. A bolt hole 64X is formed in the center of the clamp plate 64. The clamp plate 64 may be omitted. The bolt 66 extends vertically with its head facing downward. The bolts 66 pass through bolt holes 64X in the clamp plate 64 and cross holes 71X in the base 60 and enter nuts (not shown) retained in the housing 10. The base portion 6 is fixed to the body portion 2 by a bolt 66 which enters a nut, and a clamp plate 64 .

[0043] If necessary, the user changes at least one of the attitude of the main body portion 2 and the handle portion 4 relative to the base portion 6 (the tilt angle of the main body portion 2 and the handle portion 4 to the left or right) and the relative position of the main body portion 2 and the handle portion 4 in the forward / backward direction relative to the base portion 6. When changing the posture of the main body 2 and the handle 4 relative to the base 6, the user passes a wrench (not shown) through the hole 82, aligns it with the head of the bolt 66, and loosens the bolt 66. Then, the base 6 is released from the main body 2, and the bolt 66 becomes movable along the cross hole 71X. The user can change the posture of the main body 2 and the handle 4 relative to the base 6 by moving the bolt 66 along the portion extending to the left and right of the cross hole 71X, in other words, can change the inclination angle of the main body 2 and the handle 4 relative to the base 6. The base 6 of the main body 2 and the handle 4 can be tilted relative to the base 6. The user tightens the bolt 66 in the desired posture to complete the change of posture. In FIG. 1 to FIG. 4 and FIG. 6, the main body 2 and the handle 4 are tilted 45° to the right relative to the base 6. The inclination angle is an angle relative to a virtual plane that is perpendicular to the base portion 6 and extends in the front-back and up-down directions, and includes the center in the left-right direction of the main body portion 2. The inclination direction of the main body portion 2 and the handle portion 4 is the left-right direction. In addition, when changing the relative positions of the main body portion 2 and the handle portion 4 with respect to the base portion 6 in the fore-and-aft direction, the user loosens the bolt 66 with a wrench, moves the bolt 66 along the portion extending forward and backward of the cross hole 71X, and tightens the bolt 66 at the desired position. When the bolt 66 is located at the intersection of the front-rear extending portion and the left-right extending portion of the cross hole 71X, the body 2 and the handle 4 are in their basic positions relative to the base 6. When the body 2 and the handle 4 are tilted 45° to the right as shown in Figures 1 to 4 and 6, the overall center of gravity of the jigsaw J with the battery 8 attached is at point G in Figure 2.

[0044] The auxiliary base 1 extends to the left and right. The auxiliary base 1 has a head portion 100 and a leg portion 102 .

[0045] The head 100 is made of plastic. The head 100 has a head body 110, a first recess 111, a second recess 112, a slit 114, a first protrusion 115, and a second protrusion . The head body 110 is block-shaped. The first recess 111 is disposed on the upper surface of the head body 110. The first recess 111 is recessed downward with respect to the upper surface of the head body 110. By forming the first recess 111, a first protrusion 115 protruding upward from the bottom surface of the first recess 111 is formed on the upper part of the head body 110. The first protrusion 115 is rectangular and surrounds the center of the upper surface of the head body 110. Note that the first recess 111 and the first protrusion 115 are relative to each other, and only one of them may be understood. The second recess 112 is disposed on the lower surface of the head body 110. The second recess 112 is recessed upward with respect to the lower surface of the head body 110. By forming the second recess 112, a second convex portion 116 that protrudes downward from the bottom surface of the second recess 112 is formed on the lower part of the head body 110. The second convex portion 116 is rectangular and surrounds the center of the lower surface of the head body 110. The depth, which is the size in the vertical direction of the second recess 112, is shallower than the depth of the first recess 111. The height, which is the size in the vertical direction of the second convex portion 116, is lower than the height of the first convex portion 115. Note that the second recess 112 and the second convex portion 116 are relative, and only one of them may be grasped. Also, the depth of the second recess 112 may be greater than the depth of the first recess 111, and the height of the second convex portion 116 may be greater than the height of the first convex portion 115. At least one of the first protrusion 115 and the second protrusion 116 may have a shape other than a rectangular shape. The slit 114 extends rightward from the center of the left surface of the head body 110. The size of the slit 114 is similar to the size of the right end portion of the leg portion . At least one of the first recess 111 and the second recess 112, and the first protrusion 115 and the second protrusion 116 may be omitted.

[0046] The legs 102 are made of metal, are plate-shaped, and extend to the left and right. The right end of the leg 102 is inserted into the slit 114. The leg 102 is fixed to the head 100. The head 100 and the leg 102 are connected to each other. The leg 102 protrudes leftward from the left surface of the head 100 . The shape of the right end of the leg 102 is similar to the shape of the hole 74H of the ruler attachment part 74. The vertical distance from the lower surface of the leg 102 to the lower surface of the head body 110 corresponds to the vertical distance from the lower surface of the hole 74H to the lower surface of the base portion 6, and more specifically corresponds to that distance.

[0047] The auxiliary base 1 is attached to the base unit 6 by fixing the legs 102 to the ruler attachment part 74. The auxiliary base 1 is disposed forward of the blade 34. The front-rear direction intersects with the left-right direction and the up-down direction. The legs 102 are attachment parts that are attached to the attachment part of the base unit 6. 1, 2, 4, and 6, the left part of the leg 102 is passed through both holes 74H from right to left. Also, a holding bolt 75 is inserted into the right screw hole 74S. The holding bolt 75 holds the center of the leg 102 downward. If the leg 102 is inserted deeply into the hole 74H to the left, the head 100 will be relatively to the left. On the other hand, if the leg 102 is inserted shallowly into the hole 74H, the head 100 will be relatively to the right. Therefore, the left-right position of the auxiliary base 1 with respect to the base part 6 is adjustable. The user can fix the auxiliary base 1 to the base part 6 by tightening the holding bolt 75 at any position. The lower surface of the head 100 of the auxiliary base 1 attached to the base portion 6, i.e., the lower end of the second convex portion 116, contacts the upper surface of the workpiece W together with the lower surface of the base portion 6. The lower surfaces of the head 100 and the base portion 6 are included in the same imaginary plane.

[0048] The right end of the head 100 is disposed to the right of point G, which indicates the center of gravity of the entire jigsaw J, in the left-right direction that is the left-right direction of the main body 2. Disposition to the right of point G can be understood as disposition on the inclined side of the main body from point G, since the right side is the inclined side of the main body 2. The inclined side of the main body is the side on which the main body 2 is inclined. Therefore, the head 100 of the auxiliary base 1 supports the main body 2 and handle 4, which are inclined to the right, on the inclined side of the main body from the center of gravity, and the main body 2 and handle 4 are sufficiently stable. 2, the auxiliary width WA, which is the distance from the right end of the auxiliary base 1 to the left-right center of the base part 6, is equal to or greater than the width WB of the base part 6, which is the left-right size of the base part 6. Here, the left-right size of the base part 6 is the size of the base part 6 in the left-right direction in which the main part 2 and the handle part 4 can tilt. The right end of the auxiliary base 1 is the right side of the second protrusion 116, which serves as a contactable portion of the auxiliary base 1 that can come into contact with the workpiece W. Therefore, the main part 2 and the handle part 4 are sufficiently stable. The above stability can be obtained even if the inclination angle is other than 45° to the right.

[0049] 1, 2, 4, and 6, a first distance, which is the distance in the up-down direction from the leg 102 to the bottom surface of the head 100, i.e., the bottom end of the second protrusion 116, corresponds to, and more specifically corresponds to, the distance from the hole 74H to the bottom surface of the base plate 62. The up-down direction intersects with the left-right direction, which is the left-right direction.

[0050] Fig. 8 is a central cross-sectional view of the auxiliary base when a cover plate C is attached. In Fig. 8, the cover plate C is only partially indicated by a two-dot chain line. The cover plate C is made of plastic and can be attached to the base 60 . When attached, the cover plate C covers the base 60 and the lower part of the base plate 62. The cover plate C is attached to prevent the workpiece W from being scratched due to sliding of the metal base plate 62. The lower surface of the base part 6 to which the cover plate C is attached becomes the lower surface of the cover plate C, and the lower surface of the cover plate C comes into contact with the workpiece W. Since the cover plate C is softer than the base plate 62, scratching of the workpiece W, which is easily scratched by the base plate 62 such as wood, is prevented. It should be noted that the cover plate C may be an independent component from the base portion 6 or the jigsaw J.

[0051] When the cover plate C is attached, the height of the hole 74H of the ruler attachment portion 74, more specifically, the distance from the bottom surface of the hole 74H to the bottom surface of the base portion 6, increases by the thickness of the cover plate C. When the cover plate C is attached, the auxiliary base 1 is turned upside down with respect to when it is not attached, passed through each hole 74H, and fixed by the pressing bolt 75. In Fig. 8, a second distance, which is the vertical distance from the leg 102 to the lower surface of the head 100, i.e., the lower end of the first protrusion 115, corresponds to the distance from the hole 74H to the lower surface of the cover plate C, more specifically, corresponds to this distance. In this case, the lower surface of the head 100, i.e., the lower end of the first protrusion 115, is a contactable portion that contacts the upper surface of the workpiece W. The second distance is different from the first distance. When the cover plate C is attached, the user can stabilize the jigsaw J by attaching the auxiliary base 1 upside down compared to when the cover plate C is not attached. Even in this case, the user can adjust the left-right position of the auxiliary base 1 relative to the base portion 6.

[0052] Fig. 9 is an enlarged view of the auxiliary base and its surroundings when the main body 2 and the handle 4 are tilted leftward. In Fig. 9, the cover plate C is not attached. When the main body 2 and the handle 4 are tilted to the left, the legs 102 of the auxiliary base 1 are passed through the holes 74H from the left side to the right side. Also, the retaining bolt 75 is inserted into the left screw hole 74S. Then, the head 100 is disposed to the left of the base 6, which corresponds to the left-right direction of the main body 2 and the handle 4. Therefore, even when the main body 2 and the handle 4 are tilted to the left, the auxiliary base 1 improves the stability of the jigsaw J. Even in this case, the user can adjust the left-right position of the auxiliary base 1 relative to the base 6.

[0053] The auxiliary base 1 is selectively attachable to and detachable from the left or right side of the base portion 6. That is, the auxiliary base 1 is selectively attachable to and detachable from both sides of the base portion 6 in the left-right direction. Furthermore, the auxiliary base 1 supports the right side of the base part 6 when the main body part 2 is inclined to the right, and supports the left side of the base part 6 when the main body part 2 is inclined to the left, by the first convex part 115 or the second convex part 116, which are contactable parts. That is, the first convex part 115 or the second convex part 116 can selectively support both sides of the base part 6 in the left-right direction.

[0054] An example of the operation of such a Jigsaw J will now be described. The user tilts the main body 2 and the handle 4 as necessary to adjust the inclination angle of the main body 2 and the handle 4 to a desired angle. The user also attaches the blade 34 to the tool attachment portion 32. The blade 34 is attached by simply passing the upper end of the blade 34 through the tool attachment portion 32 and then slightly pushing it in. Furthermore, the user mounts the charged battery 8 in the battery mounting section 18. Furthermore, the user switches the mode of orbital movement of the blade 34 by operating the orbital switching unit 37 as necessary. Furthermore, the user operates the main power switch 26 to turn on the main power of the jigsaw J.

[0055] When the user grips the handle portion 4 and operates the trigger 48, the main switch 46 is turned on. Then, the controller 20 controls and supplies power from the battery 8 to the electric motor 12 so that the motor shaft 50 rotates at a controlled speed. The speed of the motor shaft 50 is controlled according to the rotational position of the speed adjustment switch 22 and according to the state of the signal of the main switch 46, which changes depending on the amount of operation of the trigger 48. As a result, the electric motor 12 is driven at a speed that corresponds to the rotational position of the speed adjustment switch 22 and the amount of operation of the trigger 48. The rotational direction of the motor shaft 50 may be switchable. Furthermore, the rotational force of the motor shaft 50 is converted into reciprocating motion and transmitted to the slider 30, the tool attachment portion 32, and the blade 34 by the power transmission portion 28.

[0056] Rotation of the motor shaft 50 rotates the fan 14, and creates an air flow (that is, wind) within the main body 2. Such wind cools the internal mechanisms of the jigsaw J, including the electric motor 12.

[0057] Furthermore, the user may, as necessary, turn on the lock-on switch 42 while pressing the trigger 48 upward. In this case, the controller 20 maintains the rotation of the motor shaft 50 regardless of the state of the main switch 46. Therefore, by operating the lock-on switch 42, the user can continue the up and down movement of the blade 34 without continuing to operate the trigger 48 upward. When the lock-on switch 42 is switched from on to off, the maintenance of the rotation of the motor shaft 50 is released.

[0058] Then, the user brings the workpiece action portion of the reciprocating blade 34 into contact with the portion of the workpiece W, and moves the blade 34 relative to the workpiece W. Then, the portion of the workpiece W is cut by the blade 34. As the blade 34 moves, the lower surface of the base portion 6 rubs against the upper surface of the workpiece W. The user attaches the auxiliary base 1 as necessary depending on the state of the main body 2 and the handle 4. By attaching the auxiliary base 1, the user can cut the workpiece W with the jigsaw J in a state of improved stability. Furthermore, when the auxiliary base 1 is not necessary, such as when the user wants to leave the area around the base 6 open, the user can perform processing with the jigsaw J with the auxiliary base 1 removed. When the user starts cutting by placing the blade 34 against the edge of the workpiece W, the auxiliary base 1 is positioned in front of the blade 34, allowing the auxiliary base 1 to come into contact with the workpiece W before the blade 34, allowing the user to perform cutting work with the jigsaw J in a sufficiently stable state.

[0059] The head 100 of the auxiliary base 1 is provided with a first recess 111 and a second recess 112. Therefore, when the first recess 111 or the second recess 112 is on the lower side and the first convex portion 115 or the second convex portion 116 rubs against the upper surface of the workpiece W as a contactable portion, the frictional force is reduced compared to when the first recess 111 or the second recess 112 is not provided. Also, when the first recess 111 or the second recess 112 is on the upper side, the user can insert the fingertip into the first recess 111 or the second recess 112. Therefore, the stability of the jigsaw J is improved, and the ease of processing with the jigsaw J is improved. Furthermore, the depth of the first recess 111 and the depth of the second recess 112 are different, and the height of the first protrusion 115 and the height of the second protrusion 116 are different. Therefore, the user can easily understand which side of the first recess 111 or the second recess 112 should be attached to the auxiliary base 1 as the upper side depending on whether the cover plate C is attached or not. That is, when the cover plate C is not attached, the user can attach the auxiliary base 1 with the deeper first recess 111 on the upper side. On the other hand, when the cover plate C is attached, the user can attach the auxiliary base 1 with the shallower second recess 112 on the upper side.

[0060] When the processing is completed, the user stops the upward sliding operation of the trigger 48 to turn off the electric motor 12. At this time, the blade 34 stops. The user appropriately turns off the main power switch 26, and removes the battery 8, the blade 34, and the auxiliary base 1.

[0061] The first embodiment and its modified examples are not limited to those described above, and for example, the following modifications can be made as appropriate. The auxiliary base 1 may include other components than the head portion 100 and the foot portion 102 . The base portion 6 may be formed only from the base 60, or may be formed from the base 60 and a cover plate C, or may be formed from four or more members. At least any of the function of changing the attitude of the base part 6 relative to the main body part 2, the function of changing the front-rear position of the base part 6 relative to the main body part 2, the orbital movement function, the lock-on function, the ruler attachment function, and the main power supply function provided separately from the trigger 48 may be omitted or may be in another form. A mounting part dedicated to the auxiliary base 1 may be formed on the base part 6.

[0062] The Jigsaw J may be AC-powered with a commercial power source by having a power cord instead of the battery attachment section 18. At least any of the materials of the various cases and housings may be changed to resin, metal, composites thereof, etc. The divisions of the housing 10 may be changed from those described above. At least any of the various members, number of parts, installation or non-installation, material, arrangement, structure, and type, etc. may be changed as appropriate. Furthermore, the above embodiment or its modified example may be applied to a jigsaw equipped with a tool tip other than the blade 34.

[0063] Next, a second embodiment of the present disclosure will be described. Fig. 10A is a perspective view of the auxiliary base 201 of the jigsaw according to the second embodiment, and Fig. 10B is a perspective view of the auxiliary base 201 from the opposite side to that of Fig. 10A. The second embodiment is similar to the first embodiment except for the auxiliary base 201. In the second embodiment, the same members and parts as those in the first embodiment are appropriately designated by the same reference numerals as those in the first embodiment, and the description thereof will be omitted.

[0064] Except for the head portion 210, the auxiliary base 201 is configured similarly to the auxiliary base 1 of the first embodiment. Head 210 is made of plastic and has a head body 220, a first recess 221, a second recess 222, a slit 114, a first convex portion 225, a second convex portion 226, a first uneven portion 227, and a second uneven portion 228.

[0065] The head body 220 is block-shaped or plate-shaped. The head body 220 is larger than the head body 110. The size of the head body 220 may be equal to or smaller than the size of the head body 110. The first recess 221 is disposed on the upper surface of the head body 220. The first recess 221 is recessed downward with respect to the upper surface of the head body 220. By forming the first recess 221, a first protrusion 225 protruding upward from the bottom surface of the first recess 221 is formed on the upper part of the head body 220. The first protrusion 225 is rectangular and surrounds the center of the upper surface of the head body 220. Note that the first recess 221 and the first protrusion 225 are relative to each other, and only one of them may be understood. The second recess 222 is disposed on the lower surface of the head body 220. The second recess 222 is recessed upward with respect to the lower surface of the head body 220. By forming the second recess 222, a second convex portion 226 that protrudes downward from the bottom surface of the second recess 222 is formed on the lower part of the head body 220. The second convex portion 226 is rectangular and surrounds the center of the lower surface of the head body 220. The depth, which is the size in the vertical direction of the second recess 222, is shallower than the depth of the first recess 221. The height, which is the size in the vertical direction of the second convex portion 226, is lower than the height of the first convex portion 225. Note that the second recess 222 and the second convex portion 226 are relative, and only one of them may be grasped. Also, the depth of the second recess 222 may be greater than the depth of the first recess 221, and the height of the second convex portion 226 may be greater than the height of the first convex portion 225. At least one of the first protrusion 225 and the second protrusion 226 may have a shape other than a rectangular shape. The slit 114 extends from the center of the left surface of the head body 220 to the right. At least one of the first recess 221 and the second recess 222 and the first protrusion 225 and the second protrusion 226 may be omitted.

[0066] The first uneven portion 227 has a portion that protrudes upward from the bottom surface of the first recess 221 and a portion that is recessed downward between the protruding portions. The first uneven portion 227 is surrounded by the first convex portion 225. The first uneven portion 227 has a dot-like portion 230, a plurality (four) of circular portions 231, a plurality (two) of arc-like portions 232, and a plurality (twelve) of radial portions 234. The dotted portion 230 is cylindrical and protrudes upward. The height of the dotted portion 230 is lower than the height of the first protrusion 225. Each circular portion 231 protrudes upward and is circular with the dot-like portion 230 at its center when viewed from above. Each circular portion 231 is arranged concentrically when viewed from above. The height of each circular portion 231 is lower than the height of the first protrusion 225 and higher than the height of the dot-like portion 230. Each arc-shaped portion 232 protrudes upward, and when viewed from above downward, is in the shape of an arc with the dot-shaped portion 230 as the center. The arc-shaped portions 232 are arranged on the left and right of the outer circular portion 231. The height of each arc-shaped portion 232 is lower than the height of the first convex portion 225, and higher than the height of the dot-shaped portion 230 and the height of each circular portion 231. The upper ends of the dot-shaped portion 230, each circular portion 231, and each arc-shaped portion 232 are arranged so as to follow an imaginary downwardly convex spherical surface. Note that only the upper end of each circular portion 231 may be arranged so as to follow an imaginary downwardly convex spherical surface, and the other upper ends may be arranged at a position lower than the spherical surface. Each radial portion 234 protrudes upward and, when viewed from above to below, is radially arranged from the dot portion 230 as the center. Each radial portion 234 is arranged from the dot portion 230 to the outer circular portion 231 and the arc portion 232. The height of each radial portion 234 is lower than the height of the first protrusion 225. Incidentally, the presence or absence and number of the dot-like portions 230, the circular portions 231, the arc-like portions 232, and the radial portions 234, as well as at least any of their heights, sizes, arrangements, and shapes may be changed to those described above.

[0067] The second uneven portion 228 has a portion that protrudes downward from the bottom surface of the second recess 222 and a portion that is recessed upward between the protruding portions. The second uneven portion 228 is surrounded by the second protruding portion 226. The second uneven portion 228 has a disk-shaped portion 240 and a plurality (four) of circular portions 241. The disk-shaped portion 240 has a downwardly protruding disk shape. The height of the disk-shaped portion 240 is lower than the height of the second protrusion 226. Each circular portion 241 protrudes downward and is circular with the disk-shaped portion 240 at its center when viewed from below to above. Each circular portion 241 is arranged concentrically when viewed from below to above. The height of each circular portion 241 is lower than the height of the second convex portion 226 and higher than the height of the disk-shaped portion 240. The upper end portions of the disk-shaped portion 240 and each circular portion 241 are arranged so as to follow an imaginary upwardly convex spherical surface. Alternatively, only the upper end of each circular portion 231 may be disposed so as to follow an imaginary upwardly convex spherical surface, and the other upper ends may be disposed at a position lower than the spherical surface. Furthermore, the presence or absence and number of the disk-shaped portion 240 and the circular portion 241, as well as at least any of the height, size, arrangement, and shape may be changed to other than those described above.

[0068] The head 210 of the auxiliary base 201 is larger than the head 100, and when attached to the ruler attachment portion 74, the rear end of the head 210 is positioned rearward of the blade 34 in the front-to-rear direction. The head 210 extends rearward of the blade 34. The first protrusion 225 and the second protrusion 226, which are contactable portions of the head 210, both extend rearward of the blade 34. This extension makes the jigsaw J even more stable than if they did not extend. The head 210 of the auxiliary base 201 is provided with a first recess 221 and a second recess 222. Therefore, when the first recess 221 or the second recess 222 is on the lower side and the first convex portion 225 or the second convex portion 226 rubs against the upper surface of the workpiece W as a contactable portion, the frictional force is reduced compared to when the first recess 221 or the second recess 222 is not provided. Also, when the first recess 221 or the second recess 222 is on the upper side, the user can place his / her fingertips on the first uneven portion 227 or the second uneven portion 228. The first uneven portion 227 and the second uneven portion 228 have an anti-slip effect due to their uneven shape. Therefore, the stability of the jigsaw J is improved, and the ease of processing by the jigsaw J is improved. Furthermore, the shape of the first uneven portion 227 and the shape of the second uneven portion 228 are different, and the height of the first convex portion 225 and the height of the second convex portion 226 are different. Therefore, the user can easily understand which side of the first recess 221 or the second recess 222 should be attached to the auxiliary base 1 as the upper side depending on whether the cover plate C is attached or not. That is, when the cover plate C is not attached, the user can attach the auxiliary base 1 with the first uneven portion 227 side as the upper side and the deeper first recess 221 as the upper side. On the other hand, when the cover plate C is attached, the user can attach the auxiliary base 1 with the second uneven portion 228 side as the upper side and the shallower second recess 222 as the upper side.

[0069] The second embodiment appropriately has the same modifications as the first embodiment. [Explanation of symbols]

[0070] 1,201··auxiliary base, 2··main body (of jigsaw), 6··base (of jigsaw), 8··battery (of jigsaw), 18··battery attachment part, 34··blade, 74··ruler attachment part, 100,210··head (of auxiliary base), 102,212··leg (of auxiliary base), 115··first convex part (contactable part), 116··second convex part (contactable part), 227··first uneven part, 228··second uneven part, G··point (overall center of gravity when the battery is attached to the jigsaw inclined at an inclination angle of 45°), J··jigsaw, W··workpiece, WA··auxiliary width, WB··width (of base part).

Claims

1. An auxiliary base that attaches to a jigsaw, It has a contactable portion which is a part that can come into contact with the workpiece when installed, The jigsaw has a base portion that can contact the workpiece and a main body portion, and the main body portion is tiltable in the left-right direction relative to the base portion. The auxiliary width, which is the distance from the contactable portion to the center of the base portion in the left-right direction of the main body, is installed in a state where it is greater than the width of the base portion in the left-right direction. An auxiliary base characterized by the following features.

2. In the left-right direction of the main body, the contactable portion is positioned on the side of the main body that is tilted relative to the center of gravity of the jigsaw when the tilt angle of the main body is 45°. The auxiliary base according to feature 1.

3. An auxiliary base that attaches to a jigsaw, It has a contactable portion which is a part that can come into contact with the workpiece when installed, The jigsaw has a base portion that can contact the workpiece and a main body portion, and the main body portion is tiltable in the left-right direction relative to the base portion. In the left-right direction of the main body, the contactable portion is positioned on the side of the main body that is tilted relative to the center of gravity of the jigsaw when the tilt angle of the main body is 45°. An auxiliary base characterized by the following features.

4. The jigsaw has a battery and a battery mounting section. The auxiliary base according to any one of claims 1 to 3.

5. The position relative to the base portion in the left-right direction is adjustable. The auxiliary base according to any one of claims 1 to 3.

6. The base portion is selectively detachable from both sides in the left-right direction. The auxiliary base according to any one of claims 1 to 3.

7. The contactable portion is capable of selectively supporting both sides of the base portion in the left-right direction. The auxiliary base according to any one of claims 1 to 3.

8. It has a head and legs, The aforementioned leg portion extends in the left-right direction and is attached to the base portion. The head has the contactable portion and is connected to the legs such that a first distance, which is the distance from the upper surface to the legs in the vertical direction intersecting the left-right direction, and a second distance, which is the distance from the lower surface to the legs in the vertical direction, are different from each other. The auxiliary base according to any one of claims 1 to 3.

9. It can be attached to the ruler mounting portion of the base portion. The auxiliary base according to any one of claims 1 to 3.

10. The blade of the main body is positioned in front of it in the front-to-back direction, which intersects the left-to-right direction. The auxiliary base according to any one of claims 1 to 3.

11. The contactable portion extends rearward in the front-to-back direction, intersecting the left-to-right direction, from the blade of the main body. The auxiliary base according to any one of claims 1 to 3.

12. Furthermore, it has an uneven surface. The auxiliary base according to any one of claims 1 to 3.

13. The aforementioned uneven portion is surrounded by protrusions that have a height greater than or equal to the height of the uneven portion. The auxiliary base according to feature 12.

14. Multiple of the aforementioned protrusions and recesses are provided, each with a different shape from the others. The auxiliary base according to feature 12.

15. Having an auxiliary base as described in any one of claims 1 to 3. A jigsaw characterized by [features].

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