MAGNETIC DRILL

Abstract

A magnetic drill has a magnetic base, a main body section coupled to the magnetic base, a drill unit comprising a spindle and mounted by the main body to be movable in a direction parallel to a rotational axis of the spindle, a battery mounting area configured to hold a removable battery, and a cover configured to at least partially cover the battery mounting area. The battery mounting area has a rail extending in a straight line in a first direction and configured to slide in engagement with a groove in the battery, and a terminal area comprising a terminal that is electrically connected to a terminal in the battery.The cover is movable relative to the main body area and is configured to overlap the entirety of the connection area when the cover is in a first position and viewed from a first side in the first direction.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a magnetic drilling machine: STATE OF THE ART

[0002] A magnetic drill is a device (equipment) configured to be fixed to a workpiece made of a magnetic material by a magnetic force, and to form a hole in the workpiece using a tool accessory attached to an electric drill while moving the electric drill supported by a main body portion relative to the workpiece.

[0003] For example, JP 2020-157471 A discloses a magnetic drill that operates using a battery as a power source. Furthermore, JP 2011-104678 A discloses a magnetic drill that can supply a cutting fluid (cooling fluid) stored in a tank to a tool accessory to prevent sticking (sticking, seizing) of the tool accessory, and the like. SHORT SUMMARY

[0004] There is room for improvement in the magnetic drilling machines described above. A non-limiting objective of the present disclosure is to provide for improvements to a magnetic drilling machine.

[0005] A non-limiting aspect of the present disclosure herein provides for a magnetic drilling machine comprising a magnetic base, a main body region, a drilling unit, a battery mounting region, and a cover. The magnetic base is configured to be selectively fixed (attached) to a workpiece by a magnetic force. The main body region is coupled (connected) to the magnetic base. The drilling unit has a spindle configured to removably hold a tool accessory (also referred to as a bit). The drilling unit is mounted by the main body region such that it is movable in an axial direction with respect to a rotational axis of the spindle. In other words, the drilling unit is mounted by the main body region such that it is movable in a direction parallel to the rotational axis of the spindle.The battery mounting area is configured to removablely hold or accommodate a battery for supplying power to the magnetic drill. It is noted that the battery mounting area may be located on the main body or on the drill unit. The cover is configured to at least partially cover the battery mounting area.

[0006] The battery mounting area comprises a rail and a connection area. The rail extends in a straight line in a first direction. The rail is configured to slide into engagement with a groove in the battery when the battery is moved from a first side to a second side in the first direction relative to the rail. The connection area comprises a connector configured to be electrically connected to a terminal on the battery when the battery is positioned in a predetermined position within the battery mounting area. The cover is displaceable relative to the main body area and is configured to overlap the entirety of the connection area when the cover is in a first position, viewed from the first side in the first direction.In other words, when the cover is projected in the first position from the first side in the first direction, the entirety of the connection area is within a projection area of ​​the cover.

[0007] According to the present aspect, the cover positioned in the first position can reduce the likelihood of chips entering the battery mounting area from the first side in the first direction and adhering to the terminal area. Furthermore, the cover positioned in the first position can reduce the likelihood of any type of impact being applied to the terminal area from the first side in the first direction and damaging the terminal area. Note that the cover may be configured to overlap the entirety of the battery mounting area when the cover is in the first position and viewed from the first side in the first direction.

[0008] Another, non-limiting aspect of the present disclosure also provides for a magnetic drilling machine comprising a magnetic base, a battery mounting area, a guide area, a guided area, a motor, a drilling unit, and a cover. The magnetic base is configured to be selectively fixed to a workpiece by a magnetic force. The battery mounting area is coupled (connected) to an upper side of the magnetic base. The battery mounting area has an opening in its upper region. The guide area is coupled (connected) to the battery mounting area. The guided area is guided in an up-down direction by the guide area. The motor is connected to the guided area and configured to be rotated by power supplied from the battery mounting area.The drilling unit features a spindle configured to be rotated by the motor. The cover is configured to cover the battery compartment opening.

[0009] Based on the above, the cover can close the opening in the upper part of the battery compartment. Therefore, the cover can reduce the likelihood of chips entering the battery compartment from the outside. Furthermore, the cover can protect the battery. BRIEF DESCRIPTION OF THE DRAWINGS Fig. Figure 1 is a perspective view of a magnetic drilling machine according to a first embodiment when a cover is in a closed position. Fig. Figure 2 is another perspective view of the magnetic drilling machine when the cover is in the closed position. Fig. Figure 3 is a cross-sectional view of the magnetic drilling machine when the cover is in the closed position. Fig. 4 is a cross-sectional view along line IV-IV, which is in Fig. 3 is shown. Fig. Figure 5 is a top view of the magnetic drilling machine. Fig. Figure 6 is a perspective view of the magnetic drilling machine when the cover is in an open position. Fig. Figure 7 is a cross-sectional view of the magnetic drilling machine when the cover is in the open position. Fig. Figure 8 is a perspective partial view of a magnetic drilling machine according to a second embodiment. Fig. Figure 9 is a perspective view of an outlet nozzle (blowout nozzle). Fig. Figure 10 is a cross-sectional view to describe a coupling structure (connection structure) of an air outlet and the outlet nozzle. Fig. 11 is a perspective view of a magnetic drilling machine according to a third embodiment. Fig. 12 is another perspective view of the magnetic drilling machine. Fig. 13 is a left side view of the magnetic drilling machine. Fig. 14 is a cross-sectional view of the magnetic drilling machine. Fig. 15 is a perspective view of a magnetic drilling machine according to a fourth embodiment. Fig. 16 is a perspective view of a magnetic drilling machine according to a fifth embodiment. Fig. 17 is an overall view of the magnetic drilling machine according to the fifth embodiment. Fig. 18 is a schematic view showing a configuration for switching a permanent magnet between a maximum state and a minimum state. Fig. Figure 19 is a schematic view showing an arrangement of magnets in each of the maximum and minimum states. Fig. Figure 20 is a perspective overall view of a magnetic drilling machine according to a sixth embodiment, in which a drilling unit and a main housing are in a non-tilted state. Fig. Figure 21 is a perspective overall view of the magnetic drilling machine according to the sixth embodiment, in which the drilling unit and the main housing are in an inclined state. Fig. Figure 22 is a perspective overall view of a magnetic drilling machine according to a seventh embodiment. Fig. Figure 23 is a perspective overall view of the magnetic drilling machine according to the seventh embodiment. Fig. Figure 24 is a perspective overall view of a magnetic drilling machine according to an eighth embodiment. Fig. Figure 25 is a perspective exploded view of the magnetic drilling machine according to the eighth embodiment. Fig. Figure 26 is a partial cross-sectional view showing the arrangement of a cam and protruding components, with the protruding components in a retracted position. Fig. Figure 27 is a partial cross-sectional view showing the arrangement of the cam and the protruding components, with the protruding components in a projecting position. Fig. Figure 28 is a left-hand overall view showing a state of use of the magnetic drilling machine according to the eighth embodiment, with the protruding components in the protruding position. Fig. Figure 29 is a perspective overall view of a magnetic drilling machine according to a ninth embodiment. Fig. Figure 30 is a perspective overall view of a magnetic drilling machine according to a tenth embodiment. Fig. Figure 31 is a perspective overall view of the magnetic drilling machine according to the tenth embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0010] Representative and non-limiting embodiments according to the present disclosure are described in detail below with reference to the drawings. This detailed description is merely intended to show those skilled in the art details for practicing advantageous examples of the present disclosure and is not intended to limit the scope of the present disclosure. Furthermore, additional features and the disclosure presented below may be used separately or in conjunction with other features and disclosures to provide a further improved device, method of manufacture, and method of use thereof.

[0011] Furthermore, combinations of features and methods disclosed in the following detailed description are not necessarily required for the embodiment of the present disclosure and are given in particular to describe representative specific examples of the present disclosure. Moreover, when presenting additional and effective embodiments of the present disclosure, various features of the representative specific examples described above and below, as well as various features described in independent and dependent claims, need not necessarily be combined as in the specific examples given here or in a particular order.

[0012] All features listed in the present disclosure and / or within the scope of the claims are intended to be considered separate and independent of each other for the purpose of the original disclosure and also for the purpose of limiting the claimed invention, regardless of the combination of features in the embodiments and / or the claims. Furthermore, descriptions referring to all numerical ranges and groups or collections are treated as intended to disclose configurations related thereto, as limitations on the disclosure at the time of filing and the specific subject matter claimed.

[0013] In a non-limiting embodiment of the present disclosure, the cover can be configured to cover substantially the entirety of an exposed area of ​​a battery attached to a battery mounting area, which is exposed when a cover is in a first position. According to this embodiment, the cover, when positioned in the first position, can protect the battery and the connection area from impact from various directions.

[0014] In addition to or as an alternative to the preceding embodiment, the battery mounting area may have a recess configured to accommodate at least a portion of the battery. The recess may have an opening on the first side in the first direction. The cover may be configured to substantially block the opening of the recess when the cover is in the first position. According to this embodiment, when the cover is in the first position, the cover and a wall portion or portions defining the recess can substantially cover the entirety of the battery. This reliably reduces the probability of chips entering the battery mounting area.Furthermore, the cover and the wall area(s) defining the recess can protect the battery and the terminal area from impact from different directions.

[0015] In addition or alternatively to the preceding embodiments, the recess may be configured to accommodate at least one half of the battery. According to this embodiment, the battery can be more effectively protected against impact.

[0016] In addition to or as an alternative to the preceding embodiments, the magnetic drill may have a locking component configured to lock the cover in the first position relative to a main body area. According to this embodiment, the cover may reduce the probability of the battery falling when the magnetic drill is in a position where its first side is oriented in a direction of gravity.

[0017] In addition to or as an alternative to the preceding embodiments, the cover can be connected (coupled) to the main body area in such a way that it is pivotable (rotatable) between a first position and a second position. The cover can be configured to allow the battery to be inserted and removed when the cover is in the second position. According to this embodiment, a cover is achieved that offers excellent operability.

[0018] In addition or alternatively to the previous embodiments, the first direction may be an axial direction relative to a rotational axis of a spindle (in other words, the direction parallel to the rotational axis of the spindle). According to this embodiment, the attachment and removal of the battery is facilitated when the magnetic drill is in a position in which the rotational axis of the spindle extends in a vertical direction, even if a wall or walls surround the magnetic drill. FIRST VERSION

[0019] A magnetic drilling machine 1A according to a first exemplary embodiment is described with reference to Fig. 1 to Fig. 7 described. The magnetic drill 1A is a portable power tool. Specifically, the magnetic drill 1A is a power tool configured to form a hole in a workpiece 99 using an electric drill (drilling machine), while the magnetic drill 1A is driven by a magnetic force on the workpiece 99 (shown only in Fig. 3) is fixed (magnetically held) and is made of a magnetic material (e.g., iron). It should be noted that the magnetic drill 1A can also be referred to as a magnetic drill and a magnetic drilling device.

[0020] First, the overall configuration of the magnetic drilling machine 1A is described. As in Fig. 1 and Fig. As shown in Figure 2, the magnetic drilling machine 1A has a magnetic base 2 configured to be selectively fixed to the workpiece 99 by a magnetic force, a main body section 3 coupled (connected) to the magnetic base 2, and a drilling unit 4 supported by the main body section 3. The drilling unit 4 has a spindle (also referred to as a drill) 45 configured to removably hold a tool accessory 91 (e.g., a ring-shaped milling cutter, a twist drill bit). The drilling unit 4 is supported by the main body section 3 such that it is movable relative to the main body section 3 in an axial direction along a rotational axis R1 (i.e., a direction substantially parallel to the rotational axis R1) of the spindle 45. The drilling unit 4 moves in response to manual actuation by a user of a handle 32 provided on the main body section 3.While the drilling unit 4 is moved in a direction approaching the workpiece 99, the hole in the workpiece 99 is formed by the tool accessory 91, which rotates together with the spindle 45.

[0021] The following is a detailed description of the configuration of the magnetic drilling machine 1A.

[0022] First, the magnetic base 2 is described. As in Fig. As shown in Figure 3, the magnetic base 2 comprises a holder 21 and a magnet 20. The holder 21 has a contact surface 211 configured to make contact with the workpiece 99. The magnet 20 is supported by the holder 21. In the present embodiment, a permanent magnet is used as the magnet 20. The magnet 20 is mounted such that it is rotatable about a rotational axis R2 relative to the holder 21. The rotational axis R2 extends in a direction that is substantially perpendicular to the rotational axis R1 of the spindle 45. Although a detailed illustration and description of this are omitted here, as it is a known technology, the magnetic force acting on the workpiece 99 changes according to a change in the position of the magnet 20 about the rotational axis R2.When the magnet 20 is arranged in a predetermined position around the axis of rotation R2, the workpiece 99 is attracted and fixed to the contact surface 211 by the magnetic force generated by the magnet 20.

[0023] For the sake of simplicity, the following description defines the direction of rotation of the spindle 45's axis R1 as an up-down direction of the magnetic drilling machine 1A. In this up-down direction, the side on which the contact surface 211 is positioned is defined as the bottom side, and the opposite side is defined as the top side of the magnetic drilling machine 1A. Furthermore, the direction of rotation of the magnet 20's axis R2 is defined as a front-back direction of the magnetic drilling machine 1A. In this front-back direction, the side on which the spindle 45 is positioned relative to the magnetic base 2 is defined as the front side, and the opposite side is defined as the rear side of the magnetic drilling machine 1A. Additionally, a direction perpendicular to the axis of rotation R1 of the spindle 45 and the axis of rotation R2 of the magnet 20 is defined as a left-right direction of the magnetic drilling machine 1A.

[0024] The main body area 3 is described below. As in Fig. 1 to Fig. As shown in Figure 3, the main body area 3 is coupled (connected) to the magnetic base 2 on the opposite side from the contact surface 211 in the top-bottom direction of the magnetic drilling machine 1A. In other words, the main body area 3 is located on the upper side of the magnetic base 2. The main body area 3 is a bearing body that supports the drilling unit 4 and can also be referred to as a drill stand, main housing, and the like.

[0025] An actuating element 25 for rotating the magnet 20 is arranged at a lower rear end of the main body section 3. In the present embodiment, the actuating element 25 is a knob that is rotatable about an axis parallel to the axis of rotation R2 and is operatively coupled to the magnet 20. By manually actuating the actuating element 25 (specifically by rotating the knob), the user can change the position of the magnet 20 about the axis of rotation R2 to change the strength of the magnetic force acting on the workpiece 99, i.e., change how tightly the magnetic base 2 can be fixed to the workpiece 99. It should be noted that the actuating element 25 for rotating the magnet 20 can, for example, also be designed as a sliding lever. Furthermore, the actuating element 25 can be located at the magnetic base 2 and not on the main body section 3.

[0026] As in Fig. 3 and Fig. As shown in Figure 4, the main body area 3 has a battery mounting area 33 configured to removably receive a battery 93. The battery 93 is a rechargeable battery of a known configuration and essentially comprises a cuboid housing 930 that incorporates (receives) battery cells. A first surface, having a maximum surface area of ​​the six surfaces of the housing 930, is provided with a locking element 934 that is movable between a protruding position and a retracted position, and a connection area 937 that has terminals. A second and third surface of the six surfaces, which are different from the first surface and are opposite each other, each have grooves 931 extending in a straight line along the longitudinal direction of the battery 93.It is noted that the length, width, and height of the battery 93 and the arrangement of the locking component 934, the connection area 937, and the grooves 931 can be specified as desired. Thus, for example, the locking component 934 and the connection area 937 described above can be arranged on a surface having a minimal surface area, or they can be arranged on a surface having an intermediate surface area between the maximum surface area and the minimum surface area. The configuration of the battery mounting area 33, which accommodates the battery 93, is described in detail later.

[0027] The following describes a coupling structure between the main body area 3 and the drilling unit 4. As in Fig. 1 and Fig. As shown in Figure 3, the drilling unit 4 is coupled (connected) to the main body section 3 in such a way that it is movable in the up-down direction relative to the main body section 3. Specifically, the main body section 3 and the drilling unit 4 are coupled (connected) to each other via a rail 30 provided on the main body section 3 and a rack 44 provided on the drilling unit 4.

[0028] The rail 30 is located at a front end of the main body section 3 and extends in a straight line in the up-down direction. The rack 44 is shaped like a rod extending in the up-down direction. The rack 44 is located at a rear end of the drilling unit 4 (specifically, fixed to the rear end of a housing 40, which will be described later) and engages with the rail 30 in such a way that it is slidable in the up-down direction. Although not shown in detail, teeth of the rack 44 are formed on a rear surface of the rack 44. The rack 44 engages with a pinion 321. The pinion 321 is operatively coupled to the handle 32, which can be manually operated by the user.When the pinion 321 is rotated in response to the manual operation of the handle 32, the drilling unit 4 having the rack 44 is moved in a straight line in the up-down direction relative to the main body portion 3.

[0029] In this embodiment, the rack 44 and pinion 321 configure a movement mechanism (feeding mechanism) of the drilling unit 4 relative to the main body section 3. Furthermore, the rack 44 configures part of a coupling structure (connecting structure) that couples the drilling unit 4 and the main body section 3 such that they are movable relative to each other in the up-down direction. However, the coupling structure and movement mechanism of the drilling unit 4 and the main body section 3 are not limited to this example, and any known coupling structure and movement mechanism can be used. For example, a screw spindle mechanism comprising a screw spindle and a nut can be used as the movement mechanism of the drilling unit 4. Furthermore, the coupling structure and the movement mechanism can be provided separately.

[0030] The drilling unit 4 is described in detail below. As in Fig. 1 and Fig. As shown in Figure 3, the drilling unit 4 according to the present embodiment comprises the housing 40, the spindle 45, a motor 47, a fan wheel 48 and a control unit 50.

[0031] The housing 40 has a hollow box shape. In the present embodiment, the spindle 45, the motor 47, the fan wheel 48, and the control unit 50 are housed within the housing 40. Specifically, the spindle 45 is housed in a lower half of the housing 40. The motor 47, the fan wheel 48, and the control unit 50 are housed in an upper half of the housing 40. Thus, in the following description, the lower half of the housing 40 will also be referred to as a spindle mounting area 41, and the upper half of the housing 40 will also be referred to as a motor mounting area 42. That is, since a lubricant is arranged within the spindle mounting area 41, the spindle mounting area 41 and the motor mounting area 42 are separated by a partition wall.

[0032] The motor mounting area 42 has a general rectangular box shape and comprises an upper wall area 421, a front wall area 422, left and right side wall areas 423, and a rear wall area 424. Air inlets 431 for introducing air into the housing 40 are provided at an upper end area of ​​the motor mounting area 42. Specifically, the air inlets 431 are provided at each of the upper end areas of the side wall areas 423 (i.e., at a total of two locations). Air outlets 432 for discharging air from the housing 40 are provided at a lower end area of ​​the motor mounting area 42. Specifically, the air outlets 432 are provided at each of the lower end areas of the front wall area 422 and the side wall areas 423 (i.e., at a total of three locations).

[0033] The spindle 45 is mounted such that it is rotatable about the axis of rotation R1 relative to the housing 40. A lower end of the spindle 45 projects downwards from a lower end of the housing 40 (the spindle mounting area 41). The lower end of the spindle 45 has a tool mounting area 450, which is configured to hold the tool accessory 91 in a removable manner. It should be noted that the tool mounting area 450 can also be referred to as a drill chuck, a mandrel, and the like. The tool mounting area 450 holds the tool accessory 91 such that a central axis of the tool accessory 91 coincides with the axis of rotation R1.

[0034] The spindle 45 has an insertion hole 455 that extends upwards in a straight line along the axis of rotation R1 from a lower end of the spindle 45. The insertion hole 455 is configured to receive a guide pin 92. The guide pin 92 is a known component used to position the axis of rotation AX of the spindle 45, and thus the center of a hole to be formed in the workpiece 99 by the tool accessory, at a desired location on the workpiece 99. The guide pin 92 is inserted into and held in a through hole 911 of the tool accessory 91 and can move in a straight line along the central axis of the tool accessory 91.

[0035] Although not shown in detail, as it is a known configuration, a container holding a cutting fluid (coolant, cutting fluid) can be selectively attached to the magnetic drilling machine 1A. A flow path for supplying the cutting fluid to the tool accessory 91 is provided inside the spindle 45. When the guide pin 92 is pressed against the workpiece 99 and moves upwards, the flow path opens, and the cutting fluid passes through the flow path and is supplied to the tool accessory 91.

[0036] The motor 47 is operationally coupled to the spindle 45 and is configured to drive the spindle 45 for rotation. In the present embodiment, an output shaft 471 of the motor 47 extends parallel to the spindle 45. A lower end of the output shaft 471 projects into the spindle receiving area 41, and a drive gear is formed on this section. The drive gear meshes with an output gear that is fixed to an upper end of the spindle 45. The drive gear and the output gear form a gear train for speed reduction.

[0037] The fan wheel 48 is fixed to the output shaft 471 below a stator of the motor 47 and rotates integrally with the output shaft 471. The fan wheel 48 is positioned inside the lower end region of the motor mounting area 42, and the air outlets 432 described above are arranged radially outside the fan wheel 48. When the fan wheel 48 rotates in accordance with the driving of the motor 47, an airflow is generated. The air flows into the motor mounting area 42 through the air inlets 431 and flows out of the motor mounting area 42 through the air outlets 432. The air that has flowed in through the air inlets 431 cools the motor 47 as it flows towards the air outlets 432.

[0038] The control unit 50 is a control device configured to control the operation of the magnetic drilling machine 1A. The control unit 50 controls the driving of the motor 47 based on an on / off state of a motor switch (not shown in the drawings) that is manually operated by the user. The control unit 50 is located above the motor 47 and below the air inlets 431 (or essentially in the same position as the air inlets 431 in the top-bottom direction). Thus, the airflow generated by the fan wheel 48 can also cool the control unit 50.

[0039] It is noted that the motor 47 and / or the control unit 50 do not necessarily have to be housed in the casing 40, as in the example described above, and can be housed, for example, inside the main body area 3.

[0040] The detailed configuration of battery mounting area 33 is described below.

[0041] As in Fig. 2 and Fig. As shown in Figure 3, the battery mounting area 33 is located at a rear portion of the main body area 3. The battery mounting area 33 has a receiving recess 34 into which the battery 93 is partially inserted and fitted. Specifically, the receiving recess 34 is defined by a bottom surface, left and right side surfaces, and a front surface, and is open at the top. The depth of the receiving recess 34 is such that it substantially covers (surrounds) half of the battery 93 in its longitudinal direction when the battery 93 is inserted and fitted into the receiving recess 34.

[0042] Furthermore, as in Fig. 3 and Fig. 4, the battery mounting portion 33 includes a pair of rails 341, a locking recess 344, and a terminal portion 347.

[0043] As in Fig. As shown in Figure 4, the rails 341 are provided on each of the side wall areas that define the left and right side surfaces of the receiving recess 34, and extend substantially parallel to each other in the top-bottom direction. The rails 341 are configured to engage slidably with the grooves 931 of the battery 93. By arranging the rails 341 in this way, the battery 93 is attached to the battery mounting area 33 such that the longitudinal direction of the battery 93 is substantially aligned with (parallel to) the top-bottom direction of the magnetic drill 1A.

[0044] Thus, the direction of movement of battery 93 when battery 93 is installed (hereinafter also referred to as a battery installation direction) is from the top to the bottom in the top-bottom direction. The direction of movement of battery 93 when battery 93 is removed (hereinafter also referred to as a battery removal direction) is from the bottom to the top in the top-bottom direction.

[0045] If the attachment and removal directions of the battery 93 are, for example, the front-back direction or the left-right direction, and walls surround the magnetic drill 1A (i.e., the walls are present to the front, back, left, and right of the magnetic drill 1A), the battery 93 may collide with one or some of the walls, and it is not possible to move the battery 93 appropriately. Thus, the attachment and removal of the battery 93 to and from the battery attachment portion 33 becomes impossible. In contrast, since the magnetic drill 1A is used in a state in which the contact surface 211 on the bottom of the magnetic base 2 is in contact with the workpiece 99 (see Fig. 3) There is a relatively low probability that a wall or similar structure is located above the battery mounting area 33. Therefore, by defining the mounting and removal directions of the battery 93 as described above, even if walls are present around the magnetic drill 1A, mounting and removing the battery 93 is easily accomplished.

[0046] As in Fig. As shown in Figure 3, the locking recess 344 is provided at (in) an upper end region of the front wall area, which defines the front surface of the receiving recess 34. The locking recess 344 is configured to engage with the locking component 934 when the locking component 934 of the battery 93 is in the protruding position. When the battery 93 is installed, the user moves the battery 93 in the installation direction in a state where the locking component 934 is positioned on the upper side and the rails 341 are engaged with the grooves 931. When the battery 93 reaches a predetermined position, the locking component 934, which was temporarily moved to a retracted position, returns to the protruding position, engages with the locking recess 344, and is locked. In this way, battery 93 is held in the predetermined position.

[0047] As in Fig. 3 and Fig. As shown in Figure 4, the connection area 347 is mounted below the locking recess 344 on the front wall area of ​​the receiving recess 34. The connection area 347 has terminals 348, which can be electrically connected to the terminals of the connection area 937 of the battery 93, and a bearing component 349 that supports the terminals 348. The bearing component 349 is supported by the main body area 3. When the battery 93 is placed in the predetermined position of the battery mounting area 33, as described above, the terminals of the battery 93 are electrically connected to the terminals 348 of the magnetic drill 1A.

[0048] Furthermore, as in Fig. 2, Fig. 3 and Fig. Figure 5 shows a cover 35 configured to cover the battery mounting area 33, which is provided on the main body area 3. The cover 35 is configured to switch between a closed position (see Figure 5). Fig. 2, Fig. 3 and Fig. 5) for covering an opening 340 at the upper end of the receiving recess 34 and an open position (see Fig. 6 and Fig. 7) to be moved to open the opening 340 so that the battery 93 can be installed and removed. Specifically, the cover 35 is mounted by the main body area 3 in such a way that it can pivot (rotate) about a pivot axis R3, which extends in the left-right direction of the main body area 3.

[0049] As in Fig. 2 and Fig. As shown in Figure 3, the cover 35, according to the present embodiment, is configured such that it substantially blocks (closes) (substantially covers) the entirety of the opening 340 of the receiving recess 34 when the cover 35 is in the closed position. It is noted that "substantially blocks the entirety of the opening 340 of the receiving recess 34" here means that substantially the entire edge region of the cover 35 is in contact with the main body region 3, but can equally refer to a case in which the edge region is partially spaced somewhat apart from the main body region 3. As described above, substantially half of the battery 93, which is attached to the battery mounting area 33, projects upwards from the receiving recess 34 in the longitudinal direction and is exposed to the outside of the receiving recess 34.The cover 35 is configured to essentially cover the entirety of the exposed area (section) of the battery 93 without interfering with the exposed area of ​​the battery 93 when the cover 35 is in a closed position.

[0050] Furthermore, as described above, at the time of attachment and at the time of removal, the battery 93 is moved in the up-down direction relative to the battery mounting area 33. Thus, as in Fig. 6 and Fig. As shown in Figure 7, the cover 35 is configured to provide the necessary space above the battery mounting area 33 for mounting and removing the battery 93 when the cover 35 is in the open position.

[0051] Furthermore, the cover 35 has a locking element 353 configured to lock the cover 35 to the main body region 3 when the cover 35 is in the closed position. The locking element 353 is located substantially furthest from the edge region of the cover 35, on a section that comes into contact with the main body region 3. According to the present embodiment, the locking element 353 is a pivotable (rotatable) hook-shaped element that engages with the main body region 3. The locking element 353 is configured to lock the cover 35 by engaging with the main body region 3 while the cover 35 is in the closed position, preventing the cover 35 from pivoting (rotating) to the open position.It is noted that the mechanism for locking the cover 35 in the closed position to the main body area 3 is not limited to the locking component 353 and can be modified if appropriate. For example, the cover 35 can employ a snap lock to be locked to the main body area 3 in the closed position.

[0052] When a drilling operation is performed using the magnetic drill 1A, metal chips are easily dispersed. However, the cover 35, positioned in the closed position, can reduce the likelihood of chips entering the battery mounting area 33 and adhering to the terminals 348 of the connection area 347. Specifically, the cover 35, because in this embodiment it essentially blocks the opening 340 of the receiving recess 34, prevents chips from entering the receiving recess 34 from any direction. In this way, it is possible to reliably reduce the probability of a defect (fault) due to chips adhering to the connection area 347.

[0053] Furthermore, the cover 35, which is arranged in the closed position, can reduce the probability that the battery 93 will be subjected to an external impact and can thus reduce the probability that the battery 93 and / or the connection area 347 will be damaged.

[0054] Furthermore, in the present embodiment, the cover 35 is prevented from pivoting to the open position by the locking component 353 when in the closed position. Therefore, when the magnetic drill 1A is in a position in which the lower end of the spindle 45 is oriented vertically upwards (pointing) (i.e., in the opposite direction to the direction of gravity) (hereinafter simply referred to as an upward-oriented position), the cover 35 can reduce the probability of the battery 93 falling out (falling down).

[0055] It is noted that the cover 35 need not necessarily completely block (cover) the opening 340 in the present embodiment. Specifically, it is sufficient that the cover 35 is configured such that it overlaps at least a portion of the connection area 347 and preferably the entirety of the battery mounting area 33 (the entirety of the battery 93 attached to the battery mounting area 33) when the cover 35 is in the closed position and viewed from above. The magnetic drilling machine 1A is used relatively predominantly in a position in which the lower end of the spindle 45 is oriented vertically downwards, i.e., in the direction of gravity (hereinafter referred to as a downward-oriented position).Therefore, due to this configuration of the cover 35, it is possible to at least reduce the probability that the chips will fall towards the connection area 347 from the top of the cover 35 when the magnetic drilling machine 1A is used in the downward-oriented position.

[0056] Furthermore, the cover 35 can be mounted on the main body area 3 in such a way that it is, for example, slidable between the closed and open positions. Alternatively, the cover 35 can be removable from the main body area 3 (i.e., completely separable from the main body area 3).

[0057] Furthermore, the battery mounting area 33 does not necessarily have to include the receiving recess 34 and may only include the rails 341, the locking recess 344, and the connection area 347. In this case, since the exposed area of ​​the battery 93 becomes larger, the cover 35 is preferably configured to cover substantially the entirety of the exposed area of ​​the battery 93.

[0058] It is noted that it is sufficient that the magnetic drilling machine 1A, according to the present embodiment, can attract the workpiece 99 to the contact surface 211 and fix the workpiece 99 to the contact surface 211 by selectively causing the magnetic force to act on the workpiece 99. The type of magnet 20 to be used and / or a switching method for the strength of the magnetic force are therefore not specifically limited.

[0059] For example, the magnet 20 may be an electromagnet. In such an embodiment, the controller 49 may switch the state of the electromagnet between a fixation state and a non-fixation state by controlling the excitation (power supply) and de-excitation (non-power supply) of the electromagnet. Furthermore, the controller 49 may control the strength of the magnetic force acting on the workpiece 99. When the electromagnet is applied, the actuating member 25 may be an information input device (e.g., a push-button switch, a touch screen ("touch screen")) electrically connected to the controller 49. Furthermore, the actuating member 25 described above does not necessarily have to be provided on the main body portion 3 and may be provided on the magnetic base 2.

[0060] A corresponding relationship between each of the structural elements (features) of the present embodiment and each of the structural elements (features) of the present disclosure or the present invention is indicated below. However, each of the structural elements (features) of the embodiment is merely an example and does not limit each of the structural elements (features) of the present disclosure or the present invention.

[0061] The magnetic drill 1A is an example of a "magnetic drill." The magnetic base 2 is an example of a "magnetic base." The main body portion 3 is an example of a "main body portion." The drilling unit 4 and the spindle 45 are examples of a "drill unit" and a "spindle," respectively. The battery attachment portion 33 and the battery 93 are examples of a "battery attachment portion" and a "battery," respectively. The rail 341 and the terminal portion 347 are examples of a "rail" and a "terminal portion," respectively. The closed position and the open position of the cover 35 are examples of a "first position" and a "second position," respectively. The receiving recess 34 and the opening 340 are examples of a "recess" and an "opening," respectively. The locking member 353 is an example of a "locking member." Furthermore, the battery attachment portion 33 is an example of a "battery receiving portion."Rail 30 is an example of a "guide area". Rack 44 is an example of a "guided area". SECOND VERSION

[0062] A magnetic drilling machine 1B according to a second exemplary embodiment is described below with reference to Fig. 8 to Fig. 10 described.

[0063] As in Fig. As shown in Fig. 8, the magnetic drilling machine 1B according to the second embodiment differs from the magnetic drilling machine 1A according to the first embodiment in that the magnetic drilling machine 1B has an exhaust nozzle (blow-out nozzle) 7, and the remaining configuration is substantially the same as that of the magnetic drilling machine 1A. Thus, in the following description, descriptions of configurations substantially the same as those of the first embodiment will be omitted or simplified. Note that in the present disclosure, the same reference numerals used for the structural elements of the magnetic drilling machine in the drawings indicate the structural elements having similar configurations (although they may not necessarily be strictly identical).

[0064] As in Fig. 8 and Fig. As shown in Figure 9, the outlet nozzle 7 according to the present embodiment has a hose 71, a connector 73 which is connected (coupled) to one end of the shaft 31, and a nozzle area 75 which is coupled to the other end of the hose 71.

[0065] Hose 71 is a tubular component that is at least partially flexible. In the present embodiment, a so-called flexible articulated hose is used as hose 71. The flexible articulated hose is a known hose formed from a plurality of synthetic resin parts that are coupled (connected) to one another via spherical surfaces of the parts. The flexible articulated hose can freely change its overall shape by altering the angles between adjacent parts and can maintain this curved shape. Furthermore, the parts can be detachably coupled to one another.

[0066] The connector 73 is configured such that it can be removed and engage with the air outlet 432 of the housing 40 of the drilling unit 4 (see Fig. 8) Specifically, the connector 73 has a hollow section 731, which has an interior that communicates with a flow path inside the hose 71, and two locking pieces 735 projecting from the hollow section 731. A first end of the hollow section 731 is coupled to the hose 71. An end section 732 on the opposite side from the first end coupled to the hose 71 is designed like a flat tube conforming to the air outlet 432. The locking pieces 735 project axially from the hollow section 731 and longitudinally from two ends of the flat end section 732. The locking pieces 735 can be bent towards each other and away from each other (i.e., in the longitudinal direction of the end section 732). Projections (tabs / tongues) 736 are provided at tip ends of each of the locking pieces 735 so that the projections 736 project away from each other.

[0067] As in Fig. 10, the connector 73 and thus the outlet nozzle 7 is attached and held to the housing 40 by inserting the locking pieces 735 through the air outlet 432 and locking the projections 736 to the inner surface of the housing 40 at positions adjacent to both ends in the longitudinal direction of the air outlet 432.

[0068] The nozzle section 75 is a tubular component comprising an interior that communicates with the flow path inside the hose 71 and a discharge opening (expulsion opening) 751 for discharge (expulsion) air supplied by the air outlet 432. The nozzle section 75 has a tapered shape so that the air can be expelled to a specific target position.

[0069] It is noted that in the present embodiment, the connector 73 is coupled (connected) to one end of the parts of the hose 71 (the flexible articulated hose) via the spherical surface of the part in a manner similar to coupling (connecting) the parts of the hose 71 together. Thus, the user can freely change the orientation of the connector 73 relative to the hose 71. Furthermore, the connector 73 is removable from the hose 71. Therefore, by replacing the connector 73, the user can use the outlet nozzle 7 not only with the magnetic drill 1B, but also with a different magnetic drill that has an air outlet of a different shape. The nozzle area 75 is also configured to be interchangeable in a manner similar to the connector 73.

[0070] As described in the first embodiment, in the magnetic drilling machine 1B the cutting fluid can also be supplied to the tool accessory 91 from the reservoir via the flow path inside the spindle 45. The cutting fluid can be conveniently supplied from the reservoir when the magnetic drilling machine 1B is in the downward-oriented position, or when the magnetic drilling machine 1B is in a position close to the downward-oriented position. In contrast, regardless of the position of the magnetic drilling machine 1B, the outlet nozzle 7 can use the airflow from the air outlet 432 for effective cooling of the tool accessory 91.

[0071] Furthermore, for example, if the cutting fluid supplied from the container is available for use, or if the magnetic drill 1B is not in use (e.g., during transport or storage), the outlet nozzle 7 can be removed from the air outlet 432. Additionally, the outlet nozzle 7 can be selectively coupled (connected) to one of the air outlets 432 of the magnetic drill 1B. Thus, for example, if there is an obstacle (e.g., a wall) adjacent to the magnetic drill 1B, the user can attach the outlet nozzle 7 to one of the air outlets 432 that is not obstructed by the obstacle and use the outlet nozzle 7. The method of coupling (connection) the outlet nozzle 7 to the air outlet 432 is not limited to the example described above and can be changed, for example, to a threaded connection, bayonet fitting, or the like.

[0072] Furthermore, in the present embodiment, since the flexible articulated hose is used as hose 71, the outlet nozzle 7 has the advantage of being able to reliably direct the air to the desired position. However, instead of the flexible articulated hose, a standard flexible metal or resin hose can be used as hose 71. In this case as well, the flexible hose can preferably retain its shape.

[0073] In a further embodiment, where the hose 71 cannot maintain its shape, a nozzle holder can preferably be provided at a lower end region of the spindle receiving area 41. The nozzle holder can be removably coupled to the nozzle area 75 or the hose 71, for example, and is configured such that it holds the nozzle area 75 or the hose 71 in a suitable position. It is noted that the nozzle holder can be removed from the spindle receiving area 41. Furthermore, the nozzle holder can be configured such that the position in which the nozzle area 75 or the hose 71 is held can be changed in a circumferential direction about the axis of rotation R1.

[0074] The present embodiment describes the exhaust nozzle 7 configured to be attached to one of the air outlets 432. In another embodiment, the exhaust nozzle 7 may be configured to (i) cover a plurality of air outlets, and (ii) be connected to at least one of the air outlets. In such an embodiment, it is possible to use the air flowing from the air outlets into the exhaust nozzle to cool the tool accessory 91. Furthermore, the arrangement and number of the air inlets 431 and the air outlets 432 according to the embodiment are merely examples and may be changed as appropriate.

[0075] It is noted that the same modifications described in relation to the first embodiment can also be applied to the magnetic drilling machine 1B according to the present embodiment. Furthermore, the cover 35 can be omitted in the magnetic drilling machine 1B.

[0076] In view of the basic idea of ​​the present disclosure, the embodiments described above and their modifications, the following aspects 1 to 6 are provided. At least one of aspects 1 to 6 can be applied individually or in combination with at least one of the embodiments described above, their modifications and the invention disclosed in each of the claims. Aspect 1

[0077] Magnetic drilling machine, with a magnetic base configured to be selectively fixed to a workpiece by a magnetic force, a main body portion connected to the magnetic base, and a drilling unit supported by the main body portion such that it is movable in a first direction, wherein the drilling unit an engine a spindle configured to removably hold a tool accessory and configured to be rotated by the motor about a rotary axis extending in the first direction, a fan configured to be rotated by the motor, a housing which houses the motor, the spindle and the fan wheel, and has at least one air inlet and at least one air outlet, and an outlet nozzle connected to the at least one air outlet and having a tubular portion that is at least partially flexible.

[0078] According to the present aspect, the air that flows into the housing through the at least one air inlet in response to the rotation of the fan wheel and flows out through the air outlet can be discharged via the outlet nozzle, which is connected to at least one air outlet, and used to cool the tool accessories. Aspect 2

[0079] Magnetic drilling machine according to aspect 1, in which the outlet nozzle is removable and coupled (connected) to at least one air outlet.

[0080] According to the present aspect, if a cutting fluid supplied from a container can be used, or if the magnetic drilling machine is not in use, the outlet nozzle can be removed, thereby improving convenience. Aspect 3

[0081] Magnetic drilling machine according to aspect 2, in which which has at least one air outlet and a plurality of air outlets arranged at mutually different positions in a circumferential direction around the axis of rotation of the spindle, and The outlet nozzle is configured in such a way that it is selectively connected to one of the majority of air outlets.

[0082] According to the present aspect, depending on the working environment of the magnetic drilling machine (e.g., depending on the position of an obstacle in the environment), the user can connect the exhaust nozzle to one of the air outlets at a suitable position and use the exhaust nozzle, thus improving comfort. Aspect 4

[0083] Magnetic drilling machine according to aspect 2 or 3, in which the outlet nozzle is configured to be connected to at least one air outlet without the use of a separate auxiliary device.

[0084] According to the present aspect, the user can easily couple the outlet nozzle to the air outlet. It is noted that, for example, a snap-in connection using flexible locking pieces, a threaded engagement, and a bayonet connection can be used as a method for coupling the outlet nozzle to the air outlet. Aspect 5

[0085] Magnetic drilling machine according to one of aspects 2 to 4, in which the outlet nozzle further a connector configured to be removably coupled to the at least one air outlet, and a nozzle area having a discharge opening, and at least one of the connector and the nozzle portion is removably coupled to the tubular region.

[0086] According to the present aspect, since the user can exchange the connector and / or the nozzle area according to an embodiment of the air outlet of the magnetic drill or a size or the like of the desired discharge opening, the comfort is improved. Aspect 6

[0087] Magnetic drilling machine according to one of aspects 1 to 5, in which the tubular area is configured in such a way that it retains its shape in a curved state.

[0088] According to the present aspect, the outlet nozzle can stably direct the air to a desired position.

[0089] Furthermore, in view of a further, non-restrictive task of providing techniques for distinguishing whether the magnetic drilling machine is in a stable state or not, the present disclosure also provides the following aspects A1 to A13, as well as a third exemplary embodiment and a fourth exemplary embodiment. Aspect A1

[0090] Magnetic drilling machine, with an engine, a drilling unit comprising at least one spindle, the spindle being configured to removably hold a tool accessory and to be driven by the motor to rotate about a first axis, a main body area configured to mount the drilling unit in such a way that it is movable in a first direction parallel to the first axis, a magnetic base that is connected (coupled) to the main body area and is configured to be selectively fixed to a workpiece by a magnetic force, and a sensor configured to detect at least one of (i) information corresponding to a falling of the magnetic drilling machine, (ii) information corresponding to a vibration of the drilling unit, or (iii) information corresponding to a posture of the magnetic drilling machine.

[0091] The magnetic drilling machine, as described in this section, can, using the sensor, detect at least one of the following: (i) information corresponding to the magnetic drilling machine falling, (ii) information corresponding to the vibration of the drilling unit, or (iii) information corresponding to the position of the magnetic drilling machine. This individual information is useful for indicating whether the magnetic drilling machine is in a stable state or not. Therefore, using the information detected by the sensor can contribute to an improvement of the magnetic drilling machine. Aspect 2

[0092] Magnetic drilling machine according to aspect 1, furthermore with a control device configured to control an operation of the magnetic drilling machine based on the information detected by the sensor, in which the control device is configured to stop driving the motor when the information indicates the falling of the magnetic drilling machine.

[0093] According to the present aspect, it can be prevented that the tool accessory is driven for turning in a state in which the magnetic drilling machine is separated from the workpiece due to falling. It is noted that the control device can, for example, consist of at least one processor / processing unit and a memory. Aspect A3

[0094] Magnetic drilling machine according to aspect A1 or aspect A2, further comprising a control device configured to control an operation of the magnetic drilling machine based on the information detected by the sensor, in which The control device is configured to stop driving the motor when the information indicates that the vibration of the drilling unit exceeds a predetermined threshold.

[0095] Since the drilling unit is mounted in the main body area in such a way that it is movable in the first direction, unexpected loosening due to play in the coupling (connection) of the mounting structure, caused by the operation of the drilling unit, can occur, resulting in vibration of the drilling unit. The accuracy of the hole formed by the tooling tends to deteriorate as the vibration increases. Therefore, since the motor drive stops when the vibration reaches a certain level, the user can take necessary measures to check for looseness in the mounting structure. Aspect A4

[0096] Magnetic drilling machine according to one of the aspects A1 to A3, further comprising a control device configured to control the operation of the magnetic drilling machine based on the information detected by the sensor, in which The sensor is configured to detect the position of the magnetic drilling machine, specifically a first position in which the magnetic base is placed on the workpiece, and a second position that differs from the first position. The control device is configured to control the operation of the magnetic drilling machine using a mode when the information indicates that the magnetic drilling machine is in the second position, which is different from the mode when the information indicates that the magnetic drilling machine is in the first position.

[0097] When the magnetic drill is in the first position, where the magnetic base is placed on the workpiece (supported on the workpiece), it can be assumed that the magnetic drill is in a stable state, in contrast to when the magnetic drill is in any other position. Therefore, by controlling the operation differently when the magnetic drill is in the first position and when it is in the second position, the control device can achieve efficient control. Aspect A5

[0098] Magnetic drilling machine according to aspect A4, further comprising a first detection device configured to detect a fastener configured to couple (connect) the main body area or magnetic base to the workpiece when the fastener is attached to the main body area or magnetic base, at which the control device is configured to (i) drive the motor independently of a detection result from the first detection device when the information indicates that the magnetic drill is in the first position, and (ii) drive the motor based on a condition that the fastener is detected by the first detection device when the information indicates that the magnetic drill is in the second position.

[0099] The fastening device is an additional tool used to prevent the magnetic drill from shifting away from the workpiece. In this particular application, when the magnetic drill is in the second position, the motor is not driven until the fastening device is attached. This prevents the magnetic drill from being driven if it is in an unstable state. It should be noted that a microswitch or a load sensor could be used as the initial detection device, for example. Aspect A6

[0100] Magnetic drilling machine according to one of the aspects A1 to A5, furthermore with a display device configured to issue a notification of any detection information received by the sensor, or information based on the detection information.

[0101] According to the present aspect, the user can use the information displayed by the display device to easily recognize the state of the magnetic drilling machine and can take appropriate measures. Aspect A7

[0102] Magnetic drilling machine according to one of aspects A1 to A6, wherein the sensor is an acceleration sensor or an angular velocity sensor.

[0103] According to the present aspect, an existing, readily available sensor can be used to detect at least one of (i) the information corresponding to the falling of the magnetic drilling machine, (ii) the information corresponding to the vibration of the drilling unit, and (iii) the information corresponding to the posture of the magnetic drilling machine. Aspect A8

[0104] Magnetic drilling machine according to aspect A7, in which the sensor is a single (only one) accelerometer and is configured to (i) capture information corresponding to the falling of the magnetic drilling machine, (ii) capture information corresponding to the vibration of the drilling unit, and (iii) capture information corresponding to the position of the magnetic drilling machine.

[0105] According to the present aspect, it is possible to capture the various types of information that are useful for controlling the magnetic drilling machine with a small number of components, compared to capturing each of the individual pieces of information using individual sensors. Aspect A9

[0106] Magnetic drilling machine according to one of aspects A1 to A8, furthermore with a control device configured to control the operation of the magnetic drilling machine based on the information captured by the sensor, and a second detecting device configured to detect whether the tool accessory held by the spindle is within a predetermined distance from the workpiece, in which the control device is configured to drive the motor at a first speed in response to the second sensing device detecting that the tool accessory is within the predetermined distance from the workpiece.

[0107] According to the present aspect, it is possible to drive the motor at a speed suitable for a machining operation when the tool accessory approaches the workpiece according to a movement of the drilling unit and the tool accessory is arranged within the predetermined distance. Aspect A10

[0108] Magnetic drilling machine according to aspect A9, further with a motor switch configured to be manually operated by a user, in the the control device is configured to (i) start driving the motor at a second speed less than the first speed in response to the motor switch being turned on, and (ii) change the motor speed from the second speed to the first speed in response to the second sensing device detecting that the tool accessory is within the predetermined distance of the workpiece.

[0109] According to the present aspect, it is possible to prevent unnecessary power consumption compared to when the motor is started such that it is driven at the first speed immediately in response to the switch being turned on. Note that it is sufficient for the first speed to be higher than the second speed, but the first speed is preferably a highest speed of the motor. Aspect A11

[0110] Magnetic drilling machine according to aspect A9 or A10, in which the spindle has an insertion hole extending along the first axis and is configured to accommodate a portion of a guide pin that is movably held along the first axis by the tooling accessory, and The second detection device is a load sensor located inside the spindle's insertion hole to detect a load from the guide pin.

[0111] The guide pin is a well-known component used to position the spindle's axis of rotation in a magnetic drilling machine at a desired position and is held and used by the tool accessory in a removable manner. According to the present design, the load sensor can detect, based on the load received by the guide pin, that the tool accessory is within the predetermined distance of the workpiece. Aspect A12

[0112] Magnetic drilling machine according to aspect A9 or aspect A10, in which the second detection device is a distance sensor or a proximity sensor arranged on the drilling unit.

[0113] According to the present aspect, it can be determined using a simple configuration that the tool accessory is within the predetermined distance from the workpiece. Aspect A13

[0114] Magnetic drilling machine, with an engine, a drilling unit having at least one spindle, wherein the spindle is configured to removably hold a tool accessory and is driven to rotate by the motor, an intermediate area that mounts the drilling unit so that it can move freely, a magnetic base that is coupled (connected) to the intermediate area and is configured to be selectively fixed to a workpiece by a magnetic force, and an accelerometer or an angular velocity sensor.

[0115] Using the accelerometer or angular velocity sensor, the magnetic drilling machine can, according to the present aspect, detect information such as its movement or position. This information is helpful in determining whether the magnetic drilling machine is in a stable state. Therefore, the magnetic drilling machine can be improved by utilizing the information captured by the accelerometer or angular velocity sensor. THIRD VERSION

[0116] A magnetic drilling machine 1C according to the third embodiment is described with reference to Fig. 11 to Fig. 14. It is noted that part of the configuration of the magnetic drilling machine 1C is essentially the same as that of the magnetic drilling machine 1A according to the first embodiment. Therefore, in the following description, a description of configurations that are essentially the same as those of the first embodiment will be omitted or simplified. It is noted that this point also applies to a fourth embodiment, which will be described later.

[0117] As in Fig. 11 and Fig. As shown in Figure 12, the magnetic drilling machine 1C has the magnetic base 2, which is configured to be selectively fixed to the workpiece by the magnetic force, the main body area 3, which is coupled (connected) to the magnetic base 2, and the drilling unit 4, which is supported by the main body area 3, in the same way as the magnetic drilling machine 1A according to the first embodiment.

[0118] The main body section 3 includes the battery mounting area 33, which is configured to removably accommodate the battery 93. The battery 93 is, for example, a rechargeable battery that can also be used in various other power tools besides the magnetic drilling machine 1C. In the present embodiment, the battery mounting area 33 is located at the rear end of the main body section 3 and is configured such that the battery 93 is attached to the battery mounting area 33 from above. It should be noted that the mounting direction of the battery 93 can, however, be a different direction. Furthermore, the magnetic drilling machine 1C can be configured to operate using power supplied from an external mains power source via a power cable instead of the battery 93.

[0119] As in Fig. As shown in Fig. 13, in the present embodiment, a gap (passage) extending in the left-right direction in the up-down direction is secured (ensured) between a portion of the main body portion 3 and the magnetic base 2. This gap serves as a slit 37 through which a fastener 95 is fitted. The fastener 95 according to the present embodiment is a long thin strip. Instead of this example, a chain, for example, may be used. The magnetic drill 1C is reliably coupled (connected) to the workpiece so that it will not separate (separate) from the workpiece by fitting the fastener 95 through the slit 37 and tightening it around the magnetic base 2 and onto the workpiece.

[0120] The magnetic drill 1C can be used in a downward-oriented position when it is placed on the workpiece so that the contact surface 211 of the magnetic base 2 (and thus the tip end of the tool accessory 91) is oriented vertically downwards, i.e., in the direction of gravity. When the magnetic drill 1C is in the downward-oriented position, it is stable, and the probability of it falling off the workpiece is low.

[0121] On the other hand, if the magnetic drill 1C is used in a position other than the downward-oriented position, if the magnetic drill 1C is not fixed by the magnetic force or is insufficiently fixed, there is a possibility that the magnetic drill 1C may fall. In particular, caution is required when the magnetic drill 1C is used in (i) the upward-oriented position, in which the contact surface 211 (and thus the lower end of the tool accessory 91) is oriented vertically upwards, i.e., in a direction opposite to the direction of gravity, (ii) a position in which the contact surface 211 is generally parallel to the vertical direction (hereinafter simply referred to as a vertical position), or (iii) an intermediate position between the upward-oriented position and the vertical position.Therefore, when the magnetic drill 1C is used in the upward-oriented position, the vertical position or the intermediate position between these positions, the use of the fastening device 95 is recommended.

[0122] As in Fig. As shown in Figure 13, in the present embodiment a microswitch 53, configured to detect the attachment of the fastener 95, is arranged on the upper surface of the magnetic base 2 inside the slot 37. The microswitch 53 is configured to be normally in an off state and is turned on when the fastener 95 is fitted through the slot 37 and tightened around the magnetic base 2 and the workpiece. The microswitch 53 is electrically connected to the controller 50 (see Figure 13). Fig. 14) connected, as described later, and outputs a signal indicating the on and off states. It is noted that a load sensor (force sensor) can be used to detect the attachment of the fastener 95 instead of the microswitch 53.

[0123] As in Fig. As shown in Figure 14, the drilling unit 4 according to the present embodiment comprises the housing 40, the spindle 45, the motor 47 and the control unit 50. The spindle 45, the motor 47 and the control unit 50 are housed in the housing 40.

[0124] The spindle 45 has an insertion hole 455 that extends upwards in a straight line along the axis of rotation R1 from the lower end of the spindle 45. The insertion hole 455 is configured to receive the guide pin 92. A spring 456 for pre-tensioning the guide pin 92 is accommodated inside the insertion hole 455. When the tooling accessory 91, which holds the guide pin 92, is attached to the tool mounting area 450 of the spindle 45, an upper end portion of the guide pin 92 is positioned inside the insertion hole 455, and the guide pin 92 is pre-tensioned downwards by the spring 456.

[0125] In an initial state, where no upward force is applied to the guide pin 92, the lower end of the guide pin 92 projects further from the lower end of the tool accessory 91. This allows the user to adjust the position of the magnetic drill 1C relative to the workpiece using the tip of the guide pin 92 as a marker. When the guide pin 92 is pressed against the workpiece as the drilling process progresses, it is forced upwards against the preload force of the spring 456.

[0126] The controller 50 is configured to control the operation of the magnetic drilling machine 1C. The controller 50 comprises at least one control circuit mounted on a control board. In the present embodiment, the controller 50 is configured by a microcomputer comprising a CPU and memory.

[0127] In the present embodiment, the control unit 50 is electrically connected to the motor 47, a motor switch 46, an acceleration sensor 51, the microswitch 53, a load sensor (force sensor) 55 and an indicator lamp 59.

[0128] The motor switch 46 is configured to be manually operated by the user to activate the motor 47. As shown in Fig. 11 and Fig. As shown in Figure 14, in the present embodiment the motor switch 46 is arranged at an upper end region of the housing 40. The motor switch 46 is configured to switch between on and off in response to manual actuation by the user. A signal indicating an on or off state, output by the motor switch 46, is used by the controller 50 to control the starting and stopping of the motor 47.

[0129] As in Fig. As shown in Figure 14, the acceleration sensor 51 is attached to the casing 40. The acceleration sensor 51 according to the present embodiment detects (i) information corresponding to the falling of the magnetic drilling machine 1C, (ii) information corresponding to the vibration of the drilling unit 4, and (iii) information corresponding to the posture of the magnetic drilling machine 1C, and outputs corresponding signals. Specifically, the acceleration sensor 51 is a three-axis acceleration sensor and detects acceleration in each of mutually perpendicular directions (an X-axis direction, a Y-axis direction, and a Z-axis direction). The signals output from the acceleration sensor 51 are used for operation control of the magnetic drilling machine 1C by the controller 50, as described below by way of example.

[0130] Upon receiving information corresponding to the fall of the magnetic drill 1C, the accelerometer 51 can, for example, detect the acceleration in each of the three directions. When the magnetic drill 1C is in free fall, the acceleration is zero in each of the three directions, and their sum is essentially zero. In the present embodiment, if, based on the signals output by the accelerometer 51, the controller 50 determines that a state in which the sum of the accelerations in the three directions is zero (e.g., the free fall state) persists for a predetermined duration while the motor 47 is being driven, the controller 50 stops the motor 47 from being driven. This type of control makes it possible to prevent the rotating drive of the tool accessory 91 from continuing in a state in which the magnetic drill 1C has separated from the workpiece.

[0131] Furthermore, as the information corresponding to the vibration of the drilling unit 4, the acceleration sensor 51 can detect the acceleration in a direction crossing, for example, the up-down direction. This vibration of the drilling unit 4 is normally a vibration that occurs as a result of loosening of the coupling structure between the main body portion 3 and the drilling unit 4. As described above, in the present embodiment, the main body portion 3 and the drilling unit 4 are coupled (connected) by the sliding engagement between the rail 30 and the rack 44. Generally, the looseness is within a tolerance range at the time of shipment. However, if play or looseness of the coupling (connection) becomes greater due to the use of the magnetic drilling machine 1C, the vibrations in the directions perpendicular to the up-down direction mainly increase.

[0132] In the present embodiment, if, based on the signals output by the acceleration sensor 51, the controller 50 determines that the vibration in a predetermined direction (e.g., the left-right direction) perpendicular to the up-down direction exceeds a predetermined threshold value when driving the motor 47, the controller 50 stops driving the motor 47. This type of control makes it possible to prevent operations from continuing while the magnetic drilling machine 1C is in an unstable state. Furthermore, it prevents the shape and dimensions of the hole formed by the tool accessory 91 from deviating significantly from a desired shape and dimensions due to vibration.

[0133] Furthermore, the acceleration sensor 51 can detect a pitch angle and an angle of the rotation axis R1 relative to the direction of gravity as information corresponding to the posture of the magnetic drill 1C. The controller 50 can identify the posture of the magnetic drill 1C based on the signals output from the acceleration sensor 51. As described above, if the fastener 95 is not attached when the magnetic drill 1C is used in the upward-oriented posture or the vertical posture, the probability of falling increases. From the detection result of the microswitch 53, it can be distinguished whether the fastener 95 is attached or not.

[0134] In the present embodiment, when the controller 50 determines that the magnetic drill 1C is in the downward-oriented posture, the controller 50 starts driving the motor 47 in response to the motor switch 46 being switched to the on state, regardless of the detection result of the microswitch 53. On the other hand, when the controller 50 determines that the magnetic drill 1C is in a posture other than the downward-oriented posture (e.g., the upward-oriented posture, the vertical posture), the controller 50 drives the motor 47 only when the controller 50 determines that the fastener 95 is attached based on the signals output from the microswitch 53.In other words, if the magnetic drill 1C is in a position other than the downward-facing position and the fastening device 95 is not attached, the control unit 50 will not drive the motor 47, even if the motor switch 46 is turned on. This prevents the magnetic drill 1C from being driven in an unstable state.

[0135] In the present embodiment, three types of information corresponding to (i) the falling of the magnetic drilling machine 1C, (ii) the vibration of the drilling unit 4, and (iii) the position of the magnetic drilling machine 1C can be acquired using only the accelerometer 51 and used in the operational control of the magnetic drilling machine 1C. Thus, the information that is helpful for controlling the magnetic drilling machine 1C is acquired using a small number of components compared to acquiring each piece of information using individual sensors.

[0136] As in Fig. As shown in Figure 14, the load sensor 55 is mounted inside the insertion hole 455 of the spindle 45, as described above. Specifically, the load sensor 55 is positioned on the upper side of the spring 456 inside an upper end region of the insertion hole 455. The load sensor 55 detects a load in response to the guide pin 92 being pressed against the workpiece and the spring 456 being compressed. The load detected by the load sensor 55 increases as the guide pin 92 moves upward, that is, as the distance in the top-down direction between the tip end of the tool accessory 91 and the workpiece decreases.

[0137] During a period in which the controller 50 determines, based on the signals output from the load sensor 55, that the detected load is less than a predetermined threshold, that is, that the tool accessory 91 is spaced from the workpiece by more than a predetermined distance, the controller 50 drives the motor 47 at an initial speed that is less than the highest speed. When the load detected by the load sensor 55 becomes equal to or greater than the predetermined threshold, that is, when the tool accessory 91 reaches the predetermined distance from the workpiece, the controller 50 increases the speed of the motor 47 from the initial speed and drives the motor 47 at the highest speed. The threshold load is preferably set to the load detected by the load sensor 55 when the tip end of the tool accessory 91 is spaced from the workpiece by, for example, one to two centimeters (cm).

[0138] It is noted that several types of tool accessories 91, which have different lengths in the axial direction, can be selectively attached to the magnetic drilling machine 1C, but the load sensor 55 can detect, regardless of the length of the workpiece 91, that the tool accessory 91 has reached the predetermined distance from the workpiece.

[0139] According to this type of control, after the user turns on the motor switch 46, during a period in which the user operates the handle 32 and lowers the drilling unit 4 until the tool accessory 91 reaches the predetermined distance from the workpiece, the rotational speed of the motor 47 is maintained at the low speed. Thus, it is possible to prevent unnecessary energy consumption. Specifically, in the present embodiment, when the battery 93 is the power supply, there is an advantage of extending the running time of the battery 93. Moreover, since the tool accessory 91 is rotated at the relatively low initial speed until the tool accessory 91 approaches the predetermined distance from the workpiece, the rotational speed of the tool accessory 91 can be efficiently increased to the highest speed when the tool accessory 91 reaches the predetermined distance.

[0140] As an alternative to the control described above, the control unit 50 can be configured so that it does not start driving the motor 47 until the tool accessory 91 reaches the predetermined distance from the workpiece. In this case, there is the advantage of further reducing energy consumption compared to driving at low speed. Furthermore, a number of loads can alternatively be predefined in stages corresponding to different distances between the tool accessory 91 and the workpiece, and the control unit 50 can increase the speed of the motor 47 in stages according to the detected load.

[0141] The load sensor 55 can indirectly detect that the distance between the tip end of the tool accessory 91 and the workpiece is equal to or less than the predetermined distance by detecting the load received by the guide pin 92. Instead of this configuration, a contact switch may be arranged inside the insertion hole 455 of the spindle 45 so that a plunger of the switch is actuated by the upper end of the guide pin 92 when the distance between the tip end of the tool accessory 91 and the workpiece is equal to or less than the predetermined distance.

[0142] The indicator lamp 59 is a device that informs the user about the status of the magnetic drilling machine 1C. As in Fig. As shown in Figure 11, the indicator lamp 59 is arranged on an upper surface of the housing 40 according to the present embodiment. The indicator lamp 59 is configured with an LED and is switched between an illuminated and an unilluminated state by the controller 50. The indicator lamp 59 illuminates when an abnormality has occurred in the magnetic drill 1C, or when, for example, a user response is required. Specifically, the indicator lamp 59 illuminates when the motor 47 is stopped due to the magnetic drill 1C falling, due to the occurrence of vibration of the drill unit 4, or when the fastening device 95 is not attached, as described above. It should be noted that if multiple pieces of information need to be reported, multiple LEDs can be provided, corresponding to each piece of information. FOURTH EMBODIMENT

[0143] A magnetic drilling machine 1D according to an exemplary fourth embodiment is described below with reference to Fig. 15 described.

[0144] The magnetic drilling machine 1D according to the fourth embodiment differs from the magnetic drilling machine 1C according to the third embodiment in that the magnetic drilling machine 1D has a distance sensor 57 and a distance setting knob 58 instead of the load sensor 55, and the remaining configuration is essentially the same as that of the magnetic drilling machine 1C. Therefore, the following description omits any description of configurations that are essentially the same as those of the third embodiment.

[0145] The distance sensor 57 is mounted on the housing 40 of the drilling unit 4 such that the distance sensor 57 faces downward. A photoelectric sensor, for example, can be used as the distance sensor 57. The distance sensor 57 is electrically connected to the controller 50 and outputs a signal indicating a distance between the distance sensor 57 and the workpiece.

[0146] The controller 50 starts driving the motor 47 when the motor switch 46 is turned on. Specifically, during a period in which the controller 50 determines, based on signals output by the distance sensor 57, that the detected distance is greater than a predetermined reference distance, the controller 50 drives the motor 47 at an initial speed that is lower than its maximum speed. Alternatively, the controller 50 can be configured not to start driving the motor 47 during a period in which the controller 50 determines that the detected distance is greater than the predetermined reference distance. If the distance detected by the distance sensor 57 is equal to or less than the predetermined reference distance, the controller 50 increases the speed of the motor 47 from its initial speed and drives the motor 47 at its maximum speed.It is noted that the reference distance is preferably set to the distance between the distance sensor 57 and the workpiece when the tip end of the tool accessory 91 is spaced 1 to 2 cm away from the workpiece.

[0147] The distance setting knob 58 is an actuating component that can be manually operated by the user to set the reference distance. In the present embodiment, the distance setting knob 58 is arranged at a front end region of the housing 40 such that it can be pressed. The distance setting knob 58 is electrically connected to the control unit 50. As described above, several tool accessories 91, which have different lengths in the axial direction, can be selectively attached to the magnetic drilling machine 1D. A plurality of reference distances are stored in the memory of the control unit 50 in association with each of the lengths of the types of tool accessories 91. By pressing the distance setting knob 58, the user can select the type of tool accessory 91 to be used and set the appropriate reference distance according to the selected tool accessory 91.The controller 50 controls the driving of the motor 47 as described above based on the reference distance set by the distance setting knob 58.

[0148] The magnetic drilling machine 1D may include a display (e.g., an LED lamp or a display) configured to notify (display) the user of information corresponding to the tool accessory 91 selected by the user.

[0149] As described above, in the present embodiment, similar to the third embodiment, after the user has switched on the motor switch 46, the motor 47 is maintained at a low speed or in a stopped state for the duration during which the user operates the handle 32 and lowers the drilling unit 4 until the tool accessory 91 reaches a certain distance from the workpiece. This prevents unnecessary energy consumption. Furthermore, since the reference distance can be predefined by the length of the tool accessory 91 currently in use, the controller 50 can change the speed of the motor 47 at a suitable time.

[0150] It should be noted that in the present embodiment, due to its mounting position on the housing 40, the distance sensor 57, which has a relatively long detection range (distance), is used. However, if it is possible to set the mounting position lower than in this example, a proximity sensor, which has a shorter detection range than the distance sensor 57, can be used. The controller 50 can increase the speed of the motor 47, as described above, in response to the workpiece being detected by the proximity sensor within the predetermined distance.

[0151] A corresponding relationship between each of the structural elements (features) of the third and fourth embodiments described above and each of the structural elements (features) of the teachings described in Aspects A1 to A13 above is shown below. However, each of the structural elements (features) of the embodiments is merely an example and does not limit each of the structural elements (features) of the teachings listed in Aspects A1 to A13 above.

[0152] Each of the magnetic drilling machines 1C, 1D is an example of a "magnetic drilling machine". A motor 47 is an example of a "motor". The drilling unit 4 and the spindle 45 are examples of the "drilling unit" and the "spindle", respectively. The main body section 3 is an example of the "main body section" and an "intermediate section". The magnetic base 2 is an example of the "magnetic base". The accelerometer 51 is an example of a "sensor". The controller 50 is an example of a "control device". The microswitch 53 is an example of a "first sensing device". The fastener 95 is an example of a "fastening device". The indicator lamp 59 is an example of an "indicator". Each of the load sensor 55 and the distance sensor 57 is an example of a "secondary sensor". The motor switch 46 is an example of a "motor switch". The guide pin 92 is an example of a "guide pin".The insertion hole 455 is an example of an "insertion hole".

[0153] It should be noted that the examples described above are merely examples, and the magnetic drilling machine according to aspects A1 to A13 is not limited to the magnetic drilling machines 1C, 1D described above by way of example. For example, it is possible to add the non-limiting modifications described below by way of example. Furthermore, at least one of these modifications can be applied in combination with any of the magnetic drilling machines 1C and 1D described by way of example in the embodiments and the teachings set forth in aspects A1 to A13 described above.

[0154] For example, the magnetic base 2 can have any configuration as long as the workpiece is attracted and fixed to the contact surface 211 by selectively applying the magnetic force generated by the magnet 20 to the workpiece. Therefore, the type of the magnet 20 and / or the switching method of the magnetic force strength are not specifically limited.

[0155] For example, magnet 20 may be an electromagnet, and controller 50 may switch between a fixed state and a non-fixed state by controlling the energization and de-energization of the electromagnet. Furthermore, controller 50 may control the strength of the magnetic force acting on the workpiece.

[0156] If the electromagnet is used instead of the magnet 20, the actuating component 25 can be an information input device (e.g., a push button switch, a touchscreen, etc.) that is electrically connected to the controller 50. The actuating component 25 can be located on the magnetic base 2 instead of on the main body area 3.

[0157] The motor 47 and / or the control unit 50 need not necessarily be located on the drilling unit 4 and can be housed inside the main body section 3. Furthermore, the motor switch 46, the indicator lamp 59, and the distance setting knob 58 can also be located on the main body section 3.

[0158] The accelerometer 51 does not necessarily need to detect all three types of information: (i) the falling of the magnetic drill 1C, 1D, (ii) the vibration of the drill unit 4, and (iii) the position of the magnetic drill 1C, 1D. In other words, the accelerometer 51 can detect only one or two of these individual pieces of information. According to these modifications to the control described above, the controller 50 can perform a control action based on the detected information. Furthermore, a different sensor can be used instead of, or in addition to, the accelerometer 51. For example, an angular velocity sensor (gyroscope sensor) can be used as a sensor that detects information related to the vibration of the drill unit 4.

[0159] The controller 50 can execute a different control than the one described by way of example in the embodiments, based on a detection result from the accelerometer 51 or the other sensor according to the modified example described above. The following description lists non-limiting examples of the control that can be applied.

[0160] For example, when an electromagnet is applied to the magnetic base 2, the controller 50 can control the strength of the electromagnet's magnetic force according to the posture of the magnetic drill 1C, 1D detected by the acceleration sensor 51. Specifically, when the magnetic drill 1C, 1D is detected to be between the vertical posture and the upward posture, the controller 50 can control the magnetic force to be the strongest. When the magnetic drill 1C, 1D is detected to be in the downward posture, the controller 50 can control the magnetic force to be smaller.

[0161] Although not shown, as it is a known configuration, a container for storing a coolant can be attached to the magnetic drilling machine 1C, 1D. However, since the container is assumed to be in use when the magnetic drilling machine 1C, 1D is in the downward-facing position, there is a possibility that the coolant could leak out if it is used in the upward-facing or vertical position. Therefore, the magnetic drilling machine 1C, 1D can also have a sensing device (e.g., a microswitch, a load sensor) that detects the attachment of the container. The controller 50 can report suitable information to the user based on a detection result from this sensing device and the position of the magnetic drilling machine 1C, 1D, which is detected by the accelerometer 51.Specifically, if it is detected that the container is attached and that the magnetic drilling machine 1C, 1D is in a position between the vertical and upward-facing positions, the control unit 50 can report an error. The indicator lamp 59, for example, can be used for such a message or notification.

[0162] Furthermore, in view of a further non-restrictive problem of providing a magnetic drilling machine which has improved comfort, the present disclosure provides the following aspects B1 to B25, as well as a fifth exemplary embodiment up to a tenth exemplary embodiment. Aspect B1

[0163] Magnetic drilling machine, with a main housing a drilling unit comprising a drill bit and mounted by the main housing in such a way that it is movable relative to the main housing in an extension direction of a rotational axis of the drill bit, a magnetic base having a permanent magnet and coupled (connected) to the main housing, wherein the magnetic base is configured to allow displacement of the permanent magnet or a yoke located in the vicinity of the permanent magnet between a first position corresponding to a maximum state and a second position corresponding to a minimum state, in order to adjust the magnetic attraction force generated by the action of a magnetic force of the permanent magnet on a workpiece between the maximum state where the magnetic attraction force is maximum and the minimum state where the magnetic attraction force is minimum. a first actuating member movably coupled directly or indirectly to the permanent magnet or the yoke and configured for manual actuation to change the magnetic attraction force between the maximum state and the minimum state, a second actuating member configured to be actuated by a single touch (actuation) to displace the permanent magnet or the yoke toward the first position, and a drive device configured to (i) displace the permanent magnet or the yoke toward the first position and (ii) displace the first actuating member toward a position corresponding to the maximum state in response to a manual actuation of the second actuating member.

[0164] Generally, the first actuating component is configured to be moved by a manual actuation (usually a rotary / turning actuation) that is difficult to perform with a single touch, in order to prevent actuation against the user's will. While this type of manual actuation is easy when the magnetic drill is used in the downward-facing position, it is not so easy when the magnetic drill is used in the horizontal (sideways) or upward-facing position, as a user must actuate the first actuating component while manually holding (supporting, supporting) the magnetic drill.On the other hand, according to the magnetic drilling machine described above, even when the machine is used in a horizontal or upward-oriented position, the user can move the permanent magnet or yoke towards the point where the magnetic base attaches to the workpiece and, with a single manual actuation (hereinafter referred to as one-touch actuation) using the hand holding (supporting) the magnetic drilling machine, cause the magnetic base to attach magnetically to the workpiece. This improves user convenience. The permanent magnet or yoke can be moved to its maximum position when the second actuation component is activated.Alternatively, as long as the magnetic base can be magnetically attached to the workpiece, the permanent magnet or the yoke can be moved to a position corresponding to an intermediate state between the minimum state and the maximum state.

[0165] The drive device can be, for example, an actuator that converts electrical energy into mechanical motion, or it can be a mechanical mechanism that converts the movement of the second actuating component into a movement of the permanent magnet or the yoke and the first actuating component. As long as the permanent magnet is configured to be movable between the first and second positions, the yoke can be omitted. In other words, the yoke is not an essential element of the magnetic drill. Aspect B2

[0166] The magnetic drilling machine according to aspect B1, in which The drive device has an electric motor configured to be driven in response to manual actuation of the second actuating component.

[0167] According to this configuration, (i) the second actuating component, (ii) the permanent magnet or yoke and (iii) the first actuating component can be actuated in conjunction with each other using a simple device configuration. Aspect B3

[0168] Magnetic drilling machine according to aspect B2, in which the second actuating component takes the form of a push button.

[0169] According to this configuration, the user can manually operate the second actuating component extremely easily using one finger of one hand, while holding (supporting, storing) the magnetic drill with both hands. Aspect B4

[0170] A magnetic drilling machine according to any one of aspects B1 to B3, wherein the second operating member is disposed at an end portion (a first end portion) on a side opposite to the main body of the drilling unit in a direction (first direction) in which the main body and the drilling unit are aligned.

[0171] According to this configuration, when the magnetic drill is positioned at a suitable location on the workpiece, the user can very easily actuate the second actuating component using, for example, a finger of the hand holding the area around the end region (the first end region) on the opposite side of the main housing from the drill unit. The "end region (first end region)" can, for example, be an area that comprises one quarter of the magnetic drill on the opposite side of the drill unit in the direction (first direction) in which the main housing and the drill unit are aligned. Alternatively, the "end region (first end region)" can be a side surface of the magnetic drill on the opposite side of the drill unit that intersects the direction (first direction) in which the main housing and the drill unit are aligned. Aspect B5

[0172] Magnetic drilling machine according to one of aspects B1 to B3, in which the main housing and the drilling unit are configured to be tiltable relative to the magnetic base about an inclination axis (swivel axis) extending in a direction (first direction) in which the main housing and the drilling unit are aligned.

[0173] According to this configuration, it is possible to form a hole that extends in a direction that is inclined (angled) relative to the direction (first direction) in which the workpiece and the magnetic drilling machine are aligned. Aspect B6

[0174] Magnetic drilling machine according to one of aspects B1 to B3, furthermore with a fall prevention strap attached to the main housing or magnetic base, in the The anti-fall strap is an automatic rewinding strap configured so that a length of an area (section) of the anti-fall strap surrounding the workpiece can be fixed by manual actuation with a single touch.

[0175] With this configuration, the anti-fall strap can be attached to the workpiece so that it does not become loose relative to the workpiece without having to move the hand holding (supporting, holding) the magnetic drill away from the drill. This improves user comfort. Aspect B7

[0176] Magnetic drilling machine according to aspect B6, in which the anti-fall strap is fixed to the main housing or the magnetic base in such a way that it cannot be removed.

[0177] With this configuration, the user does not need to attach the anti-fall strap to the main housing or the magnetic base. This improves user comfort. Aspect B8

[0178] Magnetic drilling machine according to aspect B7, in which the fall prevention strap is fixed to the magnetic base in such a way that it cannot be removed.

[0179] According to this configuration, compared to the configuration in which the drop prevention belt is attached to the main body in a non-removable manner, a portion of the drop prevention belt that needs to be extended to wrap around the workpiece becomes shorter. Thus, a gap between the drop prevention belt and the workpiece is less likely to occur, and thus it is possible to reduce loosening of the drop prevention belt relative to the workpiece. Aspect B9

[0180] Magnetic drilling machine according to one of aspects B 1 to B3, in which the magnetic base has a protruding component configured to be mechanically moved by manual actuation between a retracted position close to the main housing and a protruding position furthest from the main housing, and The magnetic base is configured such that a contact area of ​​the magnetic base with respect to the workpiece can be changed, depending on whether or not the protruding component can contact the workpiece when the protruding component is in the retracted position and when the protruding component is in the protruding position.

[0181] According to this configuration, by utilizing the fact that the contact area (contact surface) of the magnetic base with respect to the workpiece can be changed, a force required to align the magnetic drilling machine with a position where machining is performed (i.e., a position where a hole is drilled, hereinafter referred to simply as a machining position) in various modes can be reduced. User comfort is thus improved. Aspect B10

[0182] Magnetic drilling machine according to aspect B9, in which the protruding component is configured such that it is displaceable such that (i) the contact area (contact surface) between the workpiece and the magnetic base is a first contact area (contact surface) when the magnetic attraction force is in the maximum state, and (ii) the contact area between the workpiece and the magnetic base is a second contact area (contact surface) that is smaller than the first contact area when the magnetic attraction force is in the minimum state, and The protruding component takes the form of a sphere.

[0183] According to this configuration, the user can easily align the magnetic drill to the machining position with little effort by utilizing a rolling motion of the spherical protrusion when the magnetic attraction force is at its minimum. After alignment, the user can ensure that the workpiece and the magnetic base are firmly magnetically attached to each other by moving the protrusion so that the magnetic attraction force is at its maximum. Aspect B11

[0184] Magnetic drilling machine according to aspect B10, furthermore with a linking mechanism (gearing mechanism) configured to link (gear) the first actuating component and the protruding component to cause the contact area between the workpiece and the magnetic base to be (i) the first contact area when the first actuating component is in the position corresponding to the maximum state, and (ii) the second contact area when the first actuating component is in a position corresponding to the minimum state.

[0185] According to this configuration, since the first actuator and the protruding component are linked, the user does not need to perform the actuation to relocate the protruding component and the actuation of the first actuator separately. User convenience is improved. Aspect B12

[0186] Magnetic drilling machine according to aspect B9, further with a cam configured to push the protruding component to the protruding position when the cam is at a predetermined rotation angle position.

[0187] According to this configuration, the protruding component can be moved between the retracted position and the protruding position using a simple configuration. Aspect B13

[0188] Magnetic drilling machine according to aspect B9, in which the protruding component takes the form of a sphere. Aspect B14

[0189] Magnetic drilling machine according to aspect B9, in which the protruding component is configured such that the position of the protruding component can be selectively changed between the protruding position and the retracted position when the magnetic attraction force is in the maximum state.

[0190] According to this configuration, by positioning the magnetic drill while the workpiece is in a position where the contact area between the workpiece and the magnetic base is relatively small, the user can perform the positioning while the workpiece and the magnetic base are magnetically attached to each other by the relatively weak magnetic attraction. Thus, the user can easily perform the positioning using minimal force. After aligning the magnetic drill with the appropriate machining position, the user can place the workpiece in a position where the contact area between the workpiece and the magnetic base is relatively large, so that the workpiece and the magnetic base are firmly magnetically attached to each other. Aspect B15

[0191] Magnetic drilling machine according to one of aspects B1 to B3, furthermore with an accessory plate made of a material that can be magnetically attached to the magnetic base by the effect of the magnet's magnetic force, in which The accessory plate is of such a size that the axis of rotation of the drill crosses the accessory plate when the accessory plate is magnetically attached to the magnetic base.

[0192] According to this configuration, even if the workpiece is relatively small, the accessory plate, which is magnetically attached to the magnetic base, can be positioned on the workpiece, and a hole can be formed in the workpiece. Aspect B16

[0193] Magnetic drilling machine according to Aspekt B15, in which the accessory plate has a through hole through which the axis of rotation of the drill passes when the accessory plate is magnetically attached to the magnetic base.

[0194] According to this configuration, when a through-hole is drilled in the workpiece using the magnetic drill, the through-hole in the workpiece and the through-hole in the accessory plate are aligned during the drilling process, preventing damage to the accessory plate. This extends the service life of the accessory plate and improves user convenience. Aspect B17

[0195] Magnetic drilling machine according to aspect B16, in which the accessory plate has a positioning recess or groove that corresponds at least partially to a shape of the magnetic base.

[0196] According to this configuration, it is possible to easily position the magnetic base relative to the accessory plate. Aspect B18

[0197] Magnetic drilling machine according to one of aspects B1 to B3, furthermore with a magnetic accessory (magnetic attachment) configured to be attached in a fixed manner in the vicinity of a tip end of the drill bit.

[0198] According to this configuration, chips that are separated (removed) from a bit attached to the tip of the drill bit and magnetically attracted to the magnetic accessory can be removed (removed). This allows the chips to be easily removed from the bit and collected. It is therefore possible to prevent the deterioration of the machining position caused by the chips.

[0199] Magnetic drilling machine according to Aspekt B18, further with a cover arranged to surround the circumference of the drill bit, in which the magnetic accessory is attached to the cover.

[0200] According to this configuration, the magnetic accessory can be positioned in a suitable location, spaced away from the tip end of the drill bit, by using the cover. Aspect B20

[0201] Magnetic drilling machine according to aspect B19, in which the magnetic accessory has a shape that can be detachably engaged with the cover.

[0202] According to this configuration, chips can be easily disposed of from the cover by removing the magnetic accessory to which the chips are magnetically attached (attracted). Aspect B21

[0203] Magnetic drilling machine, with a main body a drilling unit comprising a drill bit and mounted by the main housing in such a way that it is movable relative to the main housing in an extension direction of a rotational axis of the drill bit, and a magnetic base which has a magnet and is coupled (connected) to the main housing, in which the magnetic base is configured such that a magnetic attraction force, which is generated by the action of a magnetic force of the magnet and acts on a workpiece, is variable between a maximum state in which the magnetic attraction force is at its maximum and a minimum state in which the magnetic attraction force is at its minimum, in which the magnetic base has a protruding component configured to be mechanically moved by manual actuation between a retracted position close to the main housing and a protruding position furthest from the main housing, and the magnetic base is configured such that a contact area (contact surface) of the magnetic base with respect to the workpiece is changeable depending on whether the protruding member is contactable with the workpiece or not when the protruding member is in the retracted position and when the protruding member is in the projected position.

[0204] Generally, the magnetic base is a heavy component. Therefore, aligning the center of the drill bit with the machining position in which the hole is to be drilled in the workpiece (hereinafter also referred to as aligning the machining position) can require a relatively large force if the heavy magnetic base needs to be moved. It should be noted that the center of the drill bit corresponds to the center of the bit attached to the tip of the drill bit and coincides with the axis of rotation of the drill bit. According to the magnetic drill described above, by utilizing the fact that it is possible to change the contact area of ​​the magnetic base relative to the workpiece, the force required to align the machining position can be reduced in various modes. This improves user comfort.

[0205] The magnetic base can be configured such that the magnetic attraction force is at its maximum (in other words, the contact area between the workpiece and the magnetic base is maximized) when the protruding component is in the retracted position. Alternatively, the magnetic base can be configured such that the magnetic attraction force is at its maximum when the protruding component is in the extended position. Aspect B22

[0206] Magnetic drilling machine, with a main housing, and a drilling unit comprising a drill bit and mounted by the main housing in such a way that it is movable relative to the main housing in an extension direction of a rotational axis of the drill bit, and a magnetic base which has a magnet and is coupled (connected) to the main housing, in which the main housing and the drilling unit are configured such that they can be tilted relative to the magnetic base about an axis of inclination extending in a direction in which the main housing and the drilling unit are aligned.

[0207] According to the magnetic drill, it is possible to move the drilling unit relative to the main housing so that the drill's axis of rotation crosses the workpiece at an angle of less than 90 degrees. Thus, unlike a conventional magnetic drill configured to create a hole extending in the direction in which the workpiece and drill are aligned, this model can create a hole extending at an angle to that alignment. This improves user comfort. Aspect B23

[0208] Magnetic drilling machine, with a main housing a drilling unit comprising a drill bit and mounted by the main housing in such a way that it is movable relative to the main housing in an extension direction of a rotational axis of the drill bit, a magnetic base having a magnet and coupled to the main body, and a drop prevention strap attached to the main body or magnetic base, in which The anti-fall strap is an automatic rewinding strap configured in such a way that a length of an area (section) of the anti-fall strap surrounding the workpiece can be fixed by manual actuation with a single touch.

[0209] Generally, a drop-prevention strap is inserted through a through-hole in the magnetic drill, so that a section of the strap forms a ring around the workpiece. The user then adjusts the length of this ring by pulling back a section of the strap to shrink it, preventing the strap from detaching from the workpiece. The strap is then locked in place at the adjusted length. This length adjustment can be easy when the magnetic drill is used in the downward-facing position.On the other hand, adjusting the length can be difficult when the magnetic drill is used in a horizontal or upward-facing position, as the user must temporarily remove one hand from the drill while holding (supporting) it. However, with the magnetic drill described above, the user can attach the anti-fall strap to the workpiece so that it doesn't detach without moving their hand away from the drill. This improves user comfort. Aspect B24

[0210] Magnetic drilling machine, with a main housing a drilling unit comprising a drill bit and mounted by the main housing in such a way that it is movable relative to the main housing in an extension direction of a rotational axis of the drill bit, a magnetic base having a magnet and coupled to the main body, and an accessory plate made of a material that can be magnetically attached to the magnetic base by the effect of a magnetic force from the magnet, in which The accessory plate is of such a size that the axis of rotation of the drill crosses the accessory plate when the accessory plate is magnetically attached to the magnetic base.

[0211] According to this magnetic drilling machine, even if the workpiece is relatively small, the accessory plate, which is magnetically attached to the magnetic base, can be positioned on the workpiece, and the drilling operation can be performed relative to the workpiece. For example, if the workpiece is made of a magnetic material, the accessory plate is magnetized by the magnetic force of the magnet in the magnetic base, and thus the drilling operation can be performed on the workpiece in a state where the accessory plate is fixed or locked to the workpiece by its magnetic attraction. Alternatively, if the workpiece is made of a non-magnetic material, the drilling operation can be performed by positioning the workpiece on the accessory plate, which is magnetically attached to the magnetic base, and holding the workpiece by hand.In this case, the accessory panel can also be used as a workbench. Aspect B25

[0212] Magnetic drilling machine, with a main housing a drilling unit which includes a drill bit and is mounted by the main housing in such a way that it is movable relative to the main housing in a direction of extension of the drill bit, a magnetic base having a magnet and coupled to the main body, and a magnetic accessory configured to be attached in a fixed manner in the vicinity of a tip end of the drill bit.

[0213] The chips produced during drilling are typically in the form of a long spiral. These chips are not cut along part of their length but usually rotate with the bit attached to the drill bit, causing them to become entangled. These chips can obstruct the view of the workpiece (i.e., the bit) and thus hinder the drilling process. In contrast, with the magnetic drill described above, the chips can be separated from the drill bit and magnetically attached (attracted) to the magnetic accessory. When the spiral-shaped chips, rotating with the drill bit, are magnetically attached to the fixed magnetic accessory, a shearing force acts on the chips, and they are partially cut along their length. As a result, the magnetic accessory can easily separate the chips from the drill bit and collect them.This makes it possible to prevent the deterioration of the visibility of the machining position caused by chips. This improves user comfort. FIFTH EMBODIMENT

[0214] A magnetic drilling machine 1E according to an exemplary fifth embodiment is described in detail with reference to Fig. 16 to Fig. 19 described. As in Fig. Figure 16 shows that the magnetic drilling machine 1E comprises a main housing 1020, a magnetic base 1030, and a drilling unit 1040. In the following description, the direction in which the main housing 1020 and the drilling unit 1040 are aligned is defined as the front-back direction of the magnetic drilling machine 1E. In the front-back direction, the side on which the drilling unit 1040 is positioned is defined as the front of the magnetic drilling machine 1E, and the side on which the main housing 1020 is positioned is defined as the back of the magnetic drilling machine 1E. Furthermore, the direction in which the main housing 1020 and the magnetic base 1030 are aligned is defined as the top-down direction of the magnetic drilling machine 1E.In the top-bottom direction, the side on which the main housing 1020 is positioned is defined as the top side of the magnetic drill 1E, and the side on which the magnetic base 1030 is positioned is defined as the bottom side of the magnetic drill 1E. Furthermore, the direction perpendicular to the front-back and top-bottom directions is defined as the left-right direction. In the left-right direction, the right side, when viewed from the back towards the front, is defined as the right side of the magnetic drill 1E, and the opposite side is defined as the left side of the magnetic drill 1E.

[0215] As in Fig. 16 and Fig. As shown in Figure 17, the drilling unit 1040 includes a drill bit 1041. A control unit, a motor, and a speed reduction mechanism (all not shown in the drawings) are housed within a casing of the drilling unit 1040, which is positioned above the drill bit 1041. The control unit activates and stops the motor in response to manual actuation of an actuating component (not shown in the drawings) to activate and stop the magnetic drilling machine 1E. The drill bit 1041 rotates about a rotary axis AX1 extending in the up-down direction, utilizing a rotary drive force transmitted from the motor via the speed reduction mechanism. A bit (tool accessory, machining tool) 1045 for forming a hole is attached to a tip end (lower end) of the drill bit 1041.

[0216] The magnetic base 1030 has a substantially rectangular shape, and permanent magnets 1032 and 1033 (not shown in Fig. 16 and Fig. (17 shown) are contained within the magnetic base 1030. The magnetic base 1030 has a contact surface 1031 made of a magnetic material. The contact surface 1031 is a lower surface of the magnetic base 1030, which comes into contact with a workpiece and is magnetically attached to it. In the present embodiment, the contact surface 1031 is a flat surface perpendicular to the top-bottom direction of the magnetic drilling machine 1E. However, the contact surface 1031 can be curved or may have depressions and projections. The side surfaces and the top surface of the magnetic base 1030 are made of a non-magnetic material.As will be described in detail later, the magnetic base 1030 is configured such that the magnetic attraction force acting on the workpiece due to the magnetic force of the permanent magnets 1032 and 1033 is switched between (i) a maximum state, in which the magnetic attraction force is at its maximum, and (ii) a minimum state, in which the magnetic attraction force is at its minimum. In the maximum state, the contact surface 1031 is firmly attached (attracted) to the workpiece, thus reliably fixing the positional relationship between the magnetic base 1030 (and therefore the magnetic drill 1E) and the workpiece. In the minimum state, the magnetic attraction force is normally zero, and the contact surface 1031 is not magnetically attached to the workpiece.However, in the minimal state, the magnetic attraction can act to such an extent that the relative positions of the contact surface 1031 and the workpiece can be changed.

[0217] The main housing 1020 is positioned above the magnetic base 1030 and is coupled (connected) to it. A loop handle 1080, projecting upwards, is located on an upper end surface of the main housing 1020. The user can grasp the loop handle 1080 and carry the magnetic drill 1E. The loop handle 1080 is positioned at a location corresponding to the center of gravity, or near it, of the magnetic drill 1E in a plane extending perpendicular to the top-down direction. The main housing 1020 has a battery mounting area for the removable installation of a battery 1025, which supplies power to the magnetic drill 1E. An AC mains power source can be used instead of the battery 1025.

[0218] The drilling unit 1040 is mounted by the main housing 1020 in such a way that it is movable relative to the main housing 1020 in the up-down direction (in other words, in the direction of extension of the axis of rotation AX1). Specifically, a guide rail 1021, extending in the up-down direction, is provided on a rear side edge region of the drilling unit 1040. Furthermore, a guide rail 1042, extending in the up-down direction, is attached to a front side edge region of the main housing 1020. The guide rail 1021 is located inside the guide rail 1042 and engages with the guide rail 1042 in such a way that it is slidable (movable) in the up-down direction. Accordingly, the drilling unit 1040 is configured to be movable in the up-down direction relative to the main body 1020.

[0219] The magnetic drilling machine 1E further comprises a rotary actuation component 1070. The rotary actuation component 1070 is coupled to a front region of the main housing 1020. The rotary actuation component 1070 is mounted by the main housing 1020 such that it can be rotated about a pivot axis extending in the left-right direction by manual actuation. Although not shown in detail, a shaft is arranged coaxially with the pivot axis of the rotary actuation component 1070 inside the main housing 1020. A pinion formed on the circumferential surface of this shaft meshes with a rack formed along the top-bottom direction in the guide rail 1021 via an opening in the guide rail 1042.According to this type of configuration, by rotating the rotary actuator 1070, the user can raise and lower the drilling unit 1040 relative to the main housing 1020 over a distance in the up-down direction corresponding to a rotational range of the rotary actuator 1070. The rotary actuator 1070 can be configured to be removable from the main housing 1020. In such a case, the rotary actuator 1070 can be configured to be selectively attached at multiple locations (usually the left and right side surfaces of the main housing 1020).

[0220] A first actuating element 1050, configured to be manually actuated to change the magnetic attraction of the magnetic base 1030 between its maximum and minimum states, is mounted on the rear end surface of the main housing 1020. The first actuating element 1050 projects from the rear end surface of the main housing 1020. In the present embodiment, the first actuating element 1050 has the form of a knob configured to be rotatable about a pivot axis extending in the front-back direction.

[0221] As in Fig. As shown in Figure 18, a rod 1051 is coupled to the first actuating component 1050 and is coaxial with the rotating shaft of the first actuating component 1050. The rod 1051 penetrates the rear end wall of the main housing 1020 of the first actuating component 1050 and extends into the interior of the main housing 1020. A gear 1052 is coupled to the rod 1051 inside the main housing 1020. The gear 1052 meshes with a gear 1053, which is located below the gear 1052. One end of a rod 1054 is coupled to the gear 1053. The gear 1053 and the rod 1054 are housed inside the magnetic base 1030. The other end of the rod 1054 is coupled to the permanent magnet 1032. Due to this configuration, the permanent magnet 1032 is configured such that it can be rotated together with the first actuating component 1050 when the first actuating component 1050 is manually rotated.In another embodiment, the first actuating component 1050 can be directly coupled to the permanent magnet 1032 in an actuable manner (without being coupled via the gears 1052 and 1053 and the like).

[0222] As in Fig. As shown in Figure 19, the permanent magnets 1032 and 1033 are spaced apart from each other in the top-bottom direction within the magnetic base 1030, so that they are opposite each other. As described above, the permanent magnet 1032 is rotatable in conjunction with the rotation of the first actuating component 1050. On the other hand, the permanent magnet 1033 is fixed in such a way that it cannot be displaced. As shown on the left side in Fig. As shown in Figure 19, when the permanent magnet 1032 is in a first position in which the N pole of the permanent magnet 1032 is positioned on the same side as the N pole of the permanent magnet 1033, and the S pole of the permanent magnet 1032 is positioned on the same side as the S pole of the permanent magnet 1033, magnetic flux lines pass through the workpiece that is in contact with the contact surface 1031, and thus the maximum state is achieved in which the magnetic attraction force is at its maximum. On the other hand, as shown on the right in Fig. Figure 19 shows that when the permanent magnet 1032 is in a second position in which the N-pole of the permanent magnet 1032 is diagonally offset from the N-pole of the permanent magnet 1033 and the S-pole of the permanent magnet 1032 is diagonally offset from the S-pole of the permanent magnet 1033, the magnetic flux lines barely pass through the workpiece, and the minimum state is achieved in which the magnetic attraction force is minimal.

[0223] This type of configuration for changing the magnetic attraction force is also disclosed, for example, in US 9,452,521 B2, which is hereby incorporated in its entirety by reference to the present application.

[0224] The method for changing the magnetic attraction on a workpiece by the action of the permanent magnet's magnetic force is not limited to that described above, and the magnetic attraction can be changed in any other desired way. For example, in an alternative embodiment, as in a known magnetic clamping device technique (magnetic locking technique), a yoke arranged between a magnet and a workpiece in the top-bottom direction can be displaced parallel to the magnet to change the path of the magnetic flux lines between (i) a first path that passes through the workpiece without passing through the yoke, and (ii) a second path that passes through the yoke and barely passes through the workpiece.

[0225] When using the magnetic drilling machine 1E described above, the user first positions the magnetic drilling machine 1E relative to the workpiece, with the contact surface 1031 in contact with the workpiece. The user then manually rotates the first actuating component 1050, changing the magnetic attraction of the magnetic base 1030 from its minimum to its maximum state. This firmly attaches the magnetic base 1030 to the workpiece. Next, the user actuates the actuating component of the drilling unit 1040, activating the motor and causing the drill bit 1041 to rotate. Finally, the user manually rotates the rotary actuating component 1070 to lower the drill bit 1041, and the drilling operation is performed while the bit 1045 rotates along with the drill bit 1041 as it is lowered towards the workpiece.

[0226] When the magnetic drill 1E is used in the horizontally oriented position (i.e., the position in which the main housing 1020 and the magnetic base 1030 are aligned horizontally) or in the upwardly oriented position (i.e., the position in which the magnetic base 1030 is positioned above the main housing 1020 vertically), operating the mechanism to achieve maximum magnetic attraction is not easy for the user. This is because the user typically has to turn the first actuating component 1050 while holding (supporting) the magnetic drill 1E with both hands.Thus, in the present embodiment, the magnetic drilling machine 1E is configured such that operation by the user to bring the magnetic attraction to its maximum state is facilitated, even when the magnetic drilling machine 1E is used in the horizontally oriented position or in the upwardly oriented position. This type of configuration is described below. It should be noted that in the present application, the "vertical direction" and the "horizontal direction" refer to directions that are independent of the position of the magnetic drilling machine 1E. Specifically, the vertical direction refers to the direction in which gravity acts and the opposite direction to it, and the "horizontal direction" means the direction perpendicular to the vertical direction.

[0227] As in Fig. 16 and Fig. As shown in Figure 17, the magnetic drilling machine 1E further comprises a second actuating element 1055 and a drive device 1060. The second actuating element 1055 is configured to be manually actuated by a single touch to move the permanent magnet 1032 toward the first position (toward the position for the maximum state). It is noted that manual actuation with a single touch may also be referred to below as one-touch actuation. In the present embodiment, the second actuating element 1055 takes the form of a push button. However, as long as one-touch actuation is possible, the form of the second actuating element 1055 can be changed if desired. For example, the second actuating element 1055 can take the form of a slide switch.According to this type of configuration, the user can easily operate the second operating member 1055 using a finger of one of the hands while holding (supporting, storing) the magnetic drilling machine 1E with both hands.

[0228] The second actuating component 1055 can be arranged at any desired location. In the present embodiment, the second actuating component 1055 is arranged on the same side surface as the rotary actuating component 1070. Furthermore, in the present embodiment, in the front-back direction (in other words, in the direction in which the main housing 1020 and the drilling unit 1040 are aligned), the second actuating component 1055 is arranged at an end region of the main housing 1020 that is on the opposite side from the drilling unit 1040 (i.e., at the rear end region). Specifically, in the present embodiment, the second actuating component 1055 is arranged in the vicinity of a rear edge region on the left side surface of the main body housing 1020 in the front-back direction.When the magnetic drill 1E is positioned at a desired location relative to the workpiece, the user can typically hold the magnetic drill 1E while gripping the loop handle 1080 with one hand and supporting the area around the rear end of the magnetic drill 1E with the other hand. Therefore, actuating the second actuating component 1055 is easier as a result of its location near the rear end of the magnetic drill 1E. In an embodiment where the mounting position of the rotary actuating component 1070 can be changed, a plurality of the second actuating components 1055 can be arranged corresponding to each of the plurality of mounting positions of the rotary actuating component 1070.Alternatively, taking into account the fact that the magnetic drilling machine 1E can be used in different positions, the majority of second actuating components 1055 can be arranged according to the expected positions of the magnetic drilling machine 1E.

[0229] The drive device 1060 is provided for implementing the function of the second actuating member 1055. Specifically, the drive device 1060 is configured to displace the permanent magnet 1032 to the first position (the maximum state position) in response to the actuation of the second actuating member 1055, and also to displace the first actuating member 1050 toward the position corresponding to the maximum state. Specifically, as shown in Fig. 17 and Fig. As shown in Figure 18, the drive device 1060 includes an electric motor 1061 and a gear 1062. The electric motor 1061 is housed inside the main housing 1020. The gear 1062 is arranged on the outside of the main housing 1020 in the present embodiment, but may be housed inside the main housing 1020. The gear 1062 meshes with a pinion formed on the rod 1051 for transmitting the displacement of the first actuating member 1050 to the permanent magnet 1032.

[0230] When the user manually presses the second operating member 1055, the electric motor 1061 is driven, and the gear 1062 is rotated with a rotational driving force of the electric motor 1061, and the rod 1051 and thus the permanent magnet 1032 are also rotated. The electric motor 1061 is driven to rotate only in the direction that causes the permanent magnet 1032 to be displaced toward the first position. Furthermore, due to the rotation of the rod 1051, the first operating member 1050 is also rotated toward the position corresponding to the maximum state.

[0231] According to the above-described configuration, even when the magnetic drill 1E is used in the horizontally oriented posture or in the upwardly oriented posture, the user can cause the magnetic base 1030 to be magnetically attached to the workpiece by performing the single-touch operation of the second operating member 1055 by using the hand that holds (supports, supports) the magnetic drill 1E to displace the permanent magnet 1032 without performing the rotational operation of the first operating member 1050. Thus, the user's comfort is improved.

[0232] Furthermore, since the electric motor 1061 is used as the drive device 1060, it is possible to cause the second actuating member 1055, the permanent magnet 1032, and the first actuating member 1050 to operate in an interlocking manner using a simple device configuration. It should be noted, however, that this type of interlocking operation can be realized using any desired actuator or mechanical mechanism. SIXTH EMBODIMENT

[0233] Hereinafter, a magnetic drilling machine 1F according to a sixth exemplary embodiment will be described with reference to Fig. 20 and Fig. 21. In the following description, only the points in which the magnetic drilling machine 1F differs from the fifth embodiment will be described. Note that the magnetic drilling machine 1F does not include the second actuating member 1055 and the driving device 1060 according to the fifth embodiment. Furthermore, in this embodiment, the first actuating member 1050 is provided on the magnetic base 1030, and the magnetic attraction force of the magnetic base 1030 is changed when the permanent magnet 1032, which is directly coupled to the rod 1051, is rotated.

[0234] In the sixth embodiment, the main housing 1020 and the drilling unit 1040 are configured such that they can be tilted relative to the magnetic base 1030 about an inclination axis AX2 extending in the front-back direction. Specifically, as in Fig. As shown in Figure 21, the magnetic base 1030 is provided with support portions 1131 and 1132 at the upper portion at the front thereof. The support portions 1131 and 1132 are spaced apart from each other in the front-to-back direction. A coupling portion 1121 formed at a front edge of the main case 1020 is located between the support portion 1131 and the support portion 1132. Through holes, which are coaxial and penetrate in the front-to-back direction, are formed in each of the support portions 1131 and 1132 and the coupling portion 1121 of the main case 1020.

[0235] A bolt 1190 is inserted through these holes, and a nut (not shown in the drawings) is engaged with a tip end (a rear end) of the bolt 1190. The head of the bolt 1190 is rotationally fixed inside an operating lever 1191. When the user manually rotates the operating lever 1191 to tighten the bolt 1190, the coupling portion 1121 is clamped in the front-to-back direction by the support portions 1131 and 1132, and the relative positions of the coupling portion 1121 and the support portions 1131 and 1132 (and thus the relative positions of the main body 1020 and the magnetic base 1030) are fixed.

[0236] Conversely, if the user manually turns the actuating lever 1191 in the opposite direction to loosening the bolt 1190, the fixed correlation between the relative positions of the main housing 1020 and the magnetic base 1030 is released. In this state, the user can position the main housing 1020 and the drilling unit 1040 around the pivot axis AX2 (the bolt 1190) relative to the magnetic base 1030 to position the main housing 1020 and the drilling unit 1040 at a desired tilt position (pivot position). When the bolt 1190 is tightened while the main housing 1020 and the drilling unit 1040 are in the desired pivot position, the relative positions of the main housing 1020 and the magnetic base 1030 are fixed at this tilt position.In this type of pivot actuation, to avoid interference between the main housing 1020 and the magnetic base 1030, exempt areas 1122 are formed in each of the right and left side surfaces of the main housing 1020 (only the exempt area 1122 on the left side surface is in . Fig. 21 visible).

[0237] According to the magnetic drilling machine 1F described above, it is possible to selectively perform the drilling process in (i) an upright position in which the axis of rotation AX1 of the drill 1041 extends in the top-bottom direction of the magnetic drilling machine 1F (see Fig. 20), and (ii) an inclined position in which the axis of rotation AX1 is inclined with respect to the top-bottom direction of the magnetic drilling machine 1F (see Fig. 21). With regard to the latter position, it is possible to form a hole that extends in a direction angled with respect to the direction in which the workpiece and the magnetic drilling machine 1F are aligned. SEVENTH VERSION

[0238] A magnetic drilling machine 1G according to a seventh exemplary embodiment is described below with reference to Fig. 22 or Fig. 23. The following description only addresses the points where the magnetic drilling machine 1G differs from the fifth embodiment. The magnetic drilling machine 1G does not have the second actuating component 1055 and the drive device 1060 as described in the fifth embodiment.

[0239] As in Fig. 22 and Fig. As shown in Figure 23, the magnetic drilling machine 1G has a fall-prevention strap 1290. When the magnetic drilling machine 1G is used, a section of the fall-prevention strap 1290 is arranged to form a ring shape surrounding a workpiece (e.g., a steel beam) extending into space, and is then tightened around the workpiece. In this way, it is possible to fix the magnetic drilling machine 1G so that it does not fall. The fall-prevention strap 1290 is an automatically retractable strap. Specifically, the fall-prevention strap 1290 has a long strap body 1291, a retraction area 1293, and a fixing area 1294.

[0240] In the present embodiment, the anti-fall strap 1290 is fixed to the magnetic base 1030 in such a way that it cannot be removed. Because of this configuration, the user does not need to mount the anti-fall strap 1290 to the magnetic base 1030 before using the magnetic drilling machine 1G. It should be noted, however, that the anti-fall strap 1290 can be attached to the magnetic base 1030 in a removable manner. Furthermore, by attaching the anti-fall strap 1290 to the magnetic base 1030, compared to a configuration in which the anti-fall strap 1290 is attached to the main housing 1020, the length of the section of the anti-fall strap 1290 that needs to be extended to surround the workpiece is shorter. Thus, a gap is less likely to occur between the fall prevention belt 1290 and the workpiece.This makes it possible to reduce the risk of the anti-fall strap 1290 detaching from the workpiece. It should be noted, however, that the anti-fall strap 1290 can be attached to the main housing 1020 instead of the magnetic base 1030.

[0241] An automatic winding device is integrated into the winding area 1293. Examples of such automatic winding devices include those used in vehicle seat belts and those for vacuum cleaner cords. The winding area 1293 may include an actuating component that is activated for winding, as in the vacuum cleaner cord winding device. The winding area 1293 is fixed to a left-hand side surface of the magnetic base 1030. The fixing area 1294 is configured to fix (secure) a prong end 1292 of the belt body 1291. Any known structure capable of fixing the prong end 1292 using a single-touch actuation can be used as the fixing area 1294.

[0242] According to the 1G magnetic drill, the length of the section of the anti-fall strap 1290 that surrounds the workpiece automatically contracts to eliminate any loosening around the workpiece (including cases where it contracts without any manual actuation and cases where it contracts in response to a single touch). Thus, the user does not need to perform a separate actuation to tighten the strap body 1291 around the workpiece. Furthermore, the user can secure the anti-fall strap 1290 to the workpiece by means of a single touch actuation using the hand that is supporting (holding) the 1G magnetic drill. EIGHTH VERSION

[0243] Below, a magnetic drilling machine 1H is described according to an eighth exemplary embodiment with reference to Fig. 24 to Fig. 28. The following description only addresses the points in which the magnetic drilling machine 1H differs from the fifth embodiment. The magnetic drilling machine 1H does not have the second actuating component 1055 and the drive device 1060 according to the fifth embodiment.

[0244] As in Fig. As shown in Figure 24, the magnetic base 1030 of the magnetic drilling machine 1H has four protruding elements 1331. Each of the protruding elements 1331 is received inside a bottomed hole 1333 formed in a bottom region of the magnetic base 1030, such that it cannot fall out. When viewed from below, the four protruding elements 1331 are arranged in the vicinity of the four corners of the substantially rectangular magnetic base 1030 (the contact surface 1031). The protruding elements 1331 can be mechanically displaced in response to manual actuation, without receiving any magnetic effect, between (i) a retracted position in which the protruding elements 1331 are close to the main body 1020 (see Figure 24). Fig. 26) and (ii) a forward position in which the projecting components 1331 are furthest away from the main body 1020 (see Fig. 27). In the present embodiment, the protruding members 1331 are formed of a magnetic material, but they may also be formed of a non-magnetic material.

[0245] In the present embodiment, a displacement of the protruding components 1331 is linked to the displacement of the first actuating component 1050. Specifically, as in Fig. 25 shown (in Fig. 25, the main housing 1020, the magnetic base 1030 and the permanent magnets 1032 and 1033 are omitted for the sake of visibility) are both ends of the rod 1054 which supports the permanent magnet 1032 (not shown in Fig. 25) rotatably mounted, coupled to cams 1332. When the rod 1054 rotates according to the rotary actuation of the first actuating component 1050, cams 1332 also rotate together with the rod 1054. When the first actuating component 1050 is in the position corresponding to the maximum state in which the magnetic attraction force is maximum, as in Fig. As shown in Figure 26, the cam 1332 is in a rotational angular position in which the cam 1332 is not in contact with the protruding components 1331. Consequently, the protruding components 1331 are in a position that does not extend downwards from the contact surface (the bottom surface) 1031 of the magnetic base 1030 (i.e., they are in the retracted position). On the other hand, when the first actuating component 1050 is in the position corresponding to the minimum state in which the magnetic attraction force is minimal, as shown in Fig. As shown in Figure 27, the cam 1332 is in a position in which it pushes the protruding components 1331 downwards. Consequently, the protruding components 1331 protrude slightly downwards from the contact surface 1031 of the magnetic base 1030 (i.e., they are in the protruding position).

[0246] When the protruding components 1331 are in the retracted position (when the magnetic attraction force is at its maximum), the contact surface 1031 can be in contact with the workpiece. Consequently, the magnetic base 1030 (and thus the magnetic drill 1H) can be firmly fixed to the workpiece. On the other hand, when the protruding components 1331 are in the extended position (when the magnetic attraction force is at its minimum), even if the magnetic base 1030 is placed on the workpiece, the contact surface 1031 does not come into contact with the workpiece. Consequently, as in Fig. 28, only bottom portions of the protruding members 1331 are in contact with the workpiece.

[0247] In other words, when the magnetic attraction is at its minimum, compared to its maximum, the magnetic attraction with respect to the workpiece is significantly weaker (or zero) because there is a gap between the contact surface 1031 and the workpiece. Furthermore, the contact area (contact surface) between the workpiece and the protruding components 1331, which are made of the magnetic material and have a freely rollable spherical shape, is small. Thus, even though the magnetic attraction is acting on the workpiece, the user can align the drill bit with the center of the drill bit 1041 (i.e., the center of the workpiece).The user can perform machining position alignment (i.e., the center of the bit 1045 attached to the drill 1041, which coincides with the rotation axis AX1) (hereinafter referred to as machining position alignment) by moving the magnetic drill 1H with a smaller force. Thus, the user can easily perform machining position alignment. If the magnetic attraction force with respect to the workpiece is zero in the minimum state or if the protruding members 1331 are formed of the non-magnetic material, the magnetic attraction force does not act between the protruding members 1331 and the workpiece, and machining position alignment becomes even easier.

[0248] Furthermore, in the present embodiment, the first actuating component 1050 and the protruding components 1331 are linked (interlocked) via the rod 1051, the gears 1052 and 1053, the rod 1054, and the cams 1332, such that the contact area between the workpiece and the magnetic base 1030 is (i) relatively large when the first actuating component 1050 is in the position corresponding to the maximum state, and (ii) relatively small when the first actuating component 1050 is in the position corresponding to the minimum state. Thus, the user does not have to perform the manual actuation to reposition the protruding components 1331 and the manual actuation of the first actuating component 1050 separately. It is noted that the magnetic drilling machine 1H may be configured such that the displacement of the first operating member 1050 and the displacement of the protruding members 1331 are not linked.In this case, the magnetic drilling machine 1H can have a manual actuating component for repositioning the protruding components 1331, which is discrete (separate) from the first actuating component 1050.

[0249] In an alternative embodiment, the number of protruding components 1331 is not specifically limited and can be any desired number of one or more. Furthermore, in an alternative embodiment, the protruding component 1331 need not be spherical and can have any desired shape (e.g., a cylindrical shape). Even in such an embodiment, as long as the protruding component(s) 1331 is / are made of the non-magnetic material, the user can easily align the machining position because the magnetic attraction does not act between the protruding component(s) 1331 and the workpiece.

[0250] Furthermore, in another alternative embodiment, the magnetic drilling machine 1H can be configured such that the position of the protruding components 1331 can be selectively switched between the protruding position and the retracted position when the magnetic attraction force is at its maximum. In such an embodiment, the magnetic drilling machine 1H can have a manual actuating component for repositioning the protruding components 1331, which is discrete from the first actuating component 1050. In this configuration as well, the user can easily adjust the machining position when the protruding components 1331 are in the protruding position (in other words, when the contact area between the workpiece and the magnetic base 1030 is relatively small).

[0251] Furthermore, in an alternative embodiment, the magnetic base 1030 can be configured such that the magnetic attraction force acting on the workpiece is relatively large when the protruding components 1331 are in the protruding position, and the magnetic attraction force acting on the workpiece is relatively small when the protruding components 1331 are in the retracted position. For example, recesses and projections can be formed on the bottom surface of the magnetic base 1030. The protruding components 1331 can also be received in these recesses.In such an embodiment, when the protruding components 1331 are in the protruding position, the relatively large contact area can be achieved by the protruding components 1331, which protrude to the same height as the projections, so that the protruding components 1331 can be in contact with the workpiece, and when the protruding components 1331 are in the retracted position, the relatively small contact area can be achieved by the protruding components 1331, which are retracted towards the main housing 1020 more than the projections on the bottom surface of the magnetic base 1030, so that the protruding components 1331 cannot be in contact with the workpiece. NINTH VERSION

[0252] Hereinafter, a magnetic drilling machine 1K according to a ninth embodiment will be described with reference to Fig. 29. The following description only addresses the points in which the magnetic drilling machine 1K differs from the fifth embodiment. The magnetic drilling machine 1K does not have the second actuating component 1055 and the drive device 1060 as described in the fifth embodiment.

[0253] As in Fig. As shown in Figure 29, the magnetic drilling machine 1K has an accessory plate (mounting plate) 1490. The magnetic drilling machine 1K can be used to drill a hole in a relatively small workpiece. The accessory plate 1490 is essentially plate-shaped and is made of a magnetic material. As shown in Figure 29, the magnetic drilling machine 1K has an accessory plate (mounting plate) 1490. The magnetic drilling machine 1K can be used to drill a hole in a relatively small workpiece. The accessory plate 1490 is essentially plate-shaped and is made of a magnetic material. Fig. As shown in Figure 29, the magnetic drill 1K is used in a state where the accessory plate 1490 and the magnetic base 1030 are magnetically attached to each other. Since the accessory plate 1490 is formed of the magnetic material, the magnetic drill 1K can be firmly fixed to the accessory plate 1490.

[0254] The accessory plate 1490 is sized such that the rotation axis AX1 of the drill 1041 intersects the accessory plate 1490 when the accessory plate 1490 is magnetically attached to the magnetic base 1030. Thus, as long as the workpiece is placed directly below the drill 1041, a hole can be drilled in the workpiece by the magnetic drilling machine 1K. When the workpiece is formed of the magnetic material, since the accessory plate 1490 is magnetized due to the magnetic force of the magnet of the magnetic base 1030, the drilling operation can be performed on the workpiece fixed to the accessory plate 1490 by the magnetic attraction force of the accessory plate 1490. When the workpiece is formed of the non-magnetic material, the user can perform the drilling operation by placing the workpiece on the accessory plate 1490 magnetically attached to the magnetic base 1030 and holding the workpiece by hand.In this case, the accessory plate 1490 can also be used as a workbench.

[0255] As in Fig. As shown in Figure 29, the accessory plate 1490 has a positioning recess 1493 that is at least partially conformal to the shape of the magnetic base 1030. In the present embodiment, the positioning recess 1493 has a shape that conforms to the entirety of the magnetic base 1030. Instead of this configuration, the positioning recess 1493 can be configured to have a larger area than the magnetic base 1030, such that only a front half of the positioning recess 1493 conforms to a front half of the magnetic base 1030, and a rear half of the positioning recess 1493 accommodates a rear half of the magnetic base 1030.

[0256] The accessory plate 1490 is further provided with a marking 1491. In the present embodiment, the marking 1491 has a cross shape, but it can have any desired shape. The marking 1491 is arranged such that the center of the cross aligns with the axis of rotation AX1 of the drill 1041 when the magnetic base 1030 is appropriately positioned inside the positioning recess 1493. According to this configuration, positioning the magnetic base 1030 relative to the accessory plate 1490 can be easily accomplished.

[0257] In an alternative embodiment, the accessory plate 1490 can have a through-hole so that the axis of rotation AX1 (in other words, the bit 1045) can pass through the through-hole when the accessory plate 1490 is magnetically attached to the magnetic base 1030. Because of this configuration, even if a through-hole is formed in the workpiece using the magnetic drilling machine 1K, the accessory plate 1490 will not be damaged as long as the drilling operation is carried out in a state where the positions of the through-hole to be formed in the workpiece and the through-hole of the accessory plate 1490 are aligned. Thus, the service life of the accessory plate 1490 can be extended.In this embodiment, the accessory plate 1490 can be configured such that the position of the through-hole of the accessory plate 1490 is aligned with the axis of rotation AX1 when the magnetic base 1030 is suitably positioned inside the positioning recess 1493.

[0258] The accessory plate 1490 has a plurality of through holes 1492 (four in the example shown). The through holes 1492 are arranged at four corners of the substantially rectangular accessory plate 1490. The through holes 1492 can be used to fix the accessory plate 1490 to the workbench using any desired fastener. TENTH VERSION

[0259] A magnetic drilling machine 1L according to a tenth embodiment is described with reference to Fig. 30 and Fig. 31. In the following description, only points in which the magnetic drilling machine 1L differs from the fifth embodiment will be described. The magnetic drilling machine 1L does not have the second actuating member 1055 and the drive device 1060 according to the fifth embodiment.

[0260] As in Fig. 30 and Fig. As shown in Figure 31, the magnetic drilling machine 1L has a cover 1590 and a magnetic accessory 1591. The cover 1590 is attached to the magnetic base 1030 such that it at least partially surrounds the circumference of the drill bit 1041 in a U-shape. Through holes are formed in the cover 1590 to improve the visibility of the machining position (the tip end of the bit 1045). The cover 1590 prevents chips produced by the drilling process from being distributed in the surrounding area.

[0261] The magnetic accessory 1591 includes a permanent magnet 1592 and an engaging portion 1593. In the present embodiment, the permanent magnet 1592 takes the form of a magnetic plate. The engaging portion 1593 has a shape in which one plate is bent into a non-symmetrical U-shape and includes two opposing flat plate portions. A surface area of ​​one of the flat plate portions is larger than a surface area of ​​the other of the flat plate portions. The permanent magnet 1592 is fixed to the larger flat plate portion of the engaging portion 1593 (specifically, a surface on the opposite side of the smaller flat plate portion).

[0262] The magnetic accessory 1591 is removable and fixed (i.e., non-movable) in the vicinity of the tip end of the drill bit 1041. Specifically, the magnetic accessory 1591 is positioned over an upper edge of a front wall of the cover 1590 such that the front wall of the cover 1590 is positioned between the two flat plate areas of the engagement area 1593. In this way, the magnetic accessory 1591 is removable and engaged with the cover 1590. Simultaneously, the permanent magnet 1592 is in a position opposite the drill bit 1041.

[0263] According to the magnetic drilling machine 1L, long, spiral-shaped chips are separated from the bit 1045 and magnetically attached (attracted) to the magnetic accessory 1591 during the drilling process. When the spiral-shaped chips, which rotate with the bit 1045, are magnetically attached (attracted) to the fixed magnetic accessory 1591, a shearing force acts on the chips, cutting them along their length. Thus, the magnetic accessory 1591 can easily separate the chips from the bit 1045 and collect them. This prevents the chips from obstructing the view of the workpiece. Furthermore, by removing the magnetic accessory 1591, to which the chips are magnetically attached, from the cover 1590, the user can easily remove the chips from the magnetic accessory 1591.Furthermore, by using the cover 1590, the magnetic accessory 1591 can be positioned at a suitable distance from the tip end of the drill bit 1041.

[0264] In alternative embodiments, a magnetic accessory of a desired shape may be attached in a desired manner to a desired position in the vicinity of the tip end of the drill 1041. For example, a magnet holder may be provided that extends forward from a front edge portion of the magnetic base 1030 without interfering with the drill 1041. In this embodiment, the permanent magnet may be attached to the magnet holder.

[0265] Various embodiments of the present teachings are described above, but these embodiments are intended to facilitate understanding of the present invention and are not meant to limit it. Modifications and improvements may be made, and equivalent embodiments are included in the present invention, provided they do not deviate from the core and scope of the present invention. Provided that at least one of the problems described above is solved or at least one of the effects can be achieved, any of the structural elements listed in the claims and the description may be combined or omitted as desired.

[0266] For example, in embodiments six through ten, electromagnets can be used instead of permanent magnets 1032 and 1033. Furthermore, provided that at least some of the functions of the magnetic drilling machine described above can be implemented, desired mechanical mechanisms can be applied to the alternatives to the preceding configurations.

[0267] It is explicitly emphasized that all features disclosed in the description and / or the claims are to be considered separate and independent of each other for the purpose of the original disclosure as well as for the purpose of limiting the claimed invention, regardless of the feature combinations in the embodiments and / or the claims. It is explicitly stated that all range specifications or specifications of groups of units disclose every possible intermediate value or subgroup of units for the purpose of the original disclosure as well as for the purpose of limiting the claimed invention, in particular also as a limit of a range specification. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] JP 2020 - 157 471 A

[0003] JP 2011 - 104 678 A

[0003] US 9 452 521 B2

[0223]

Claims

[1] Magnetic drilling machine, with a magnetic base configured to be selectively fixed to a workpiece by a magnetic force, a main body portion coupled to the magnetic base, a drilling unit having a spindle configured to removably hold a tool accessory, wherein the drilling unit is supported by the main body portion such that it is movable in a direction parallel to a rotational axis of the spindle, a battery mounting portion configured to removably hold a battery for supplying power to the magnetic drilling machine, and a cover configured to at least partially cover the battery mounting area, where the battery mounting area a rail extending in a straight line in a first direction and configured to slidably engage a groove of the battery in response to the battery being moved relative to the rail from a first side to a second side in the first direction, and a terminal portion having a terminal configured to be electrically connected to a terminal of the battery in response to the battery being placed in a protruding position of the battery mounting portion, and the cover is displaceable relative to the main body portion and is configured to overlap an entirety of the terminal portion when the cover is in a first position and viewed from the first side in the first direction. [2] The magnetic drilling machine according to claim 1, wherein, when the cover is in the first position, the cover is configured to cover substantially an entirety of an exposed portion of the battery attached to the battery attachment portion, which portion is exposed from the battery attachment portion. [3] Magnetic drilling machine according to claim 1 or 2, in which the battery mounting portion has a recess configured to fit at least a portion of the battery therein, the recess has an opening on the first side in the first direction, and the cover is configured to substantially block the opening of the recess when the cover is in the first position. [4] A magnetic drilling machine according to claim 3, wherein the recess is configured to receive at least one half of the battery. [5] The magnetic drilling machine according to any one of claims 1 to 4, further comprising a locking member configured to lock the cover in the first position relative to the main body portion. [6] Magnetic drilling machine according to one of claims 1 to 5, in which the cover is coupled to the main body portion such that it is pivotable between the first position and a second position, and the cover is configured to allow attachment and removal of the battery when the cover is in the second position. [7] Magnetic drilling machine according to one of claims 1 to 6, wherein the first direction is the direction parallel to the axis of rotation of the spindle. [8] Magnetic drilling machine, with a magnetic base configured to be selectively fixed to a workpiece by a magnetic force, a battery receiving portion coupled to an upper side of the magnetic base and having an opening in an upper portion thereof, a guide area coupled to the battery receiving area, a guided area that is guided in an up-down direction through the guide area, a motor coupled to the guided portion and configured to be rotated by power supplied from the battery receiving portion, a drilling unit having a spindle configured to be rotated by the motor, and a cover configured to cover the opening of the battery receiving area.

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