Portable processing machine

Abstract

A portable processing machine is provided. The portable processing machine has: a main body portion; a housing having a housing main body and a door that is openable and closable; an opening and closing mechanism that opens and closes the door; and a lock operation mechanism that is supported in a displaceable manner by one of the housing main body and the main body portion, and is capable of locking the opening and closing mechanism in a closed state. The main body portion is displaceable relative to the housing between a first position in which a tool is entirely accommodated in the housing and a second position in which the tool is partially exposed outside the housing. The lock operation mechanism is displaceable by manual operation between a blocking position in which the opening of the door is blocked by the opening and closing mechanism and a permission position in which the opening of the door is permitted by the opening and closing mechanism. When the main body portion is in the first position, the lock operation mechanism is permitted to be displaced from the blocking position to the permission position, and when the main body portion is in a position other than the first position, the lock operation mechanism is prohibited from being displaced from the blocking position to the permission position by abutment of the other one of the housing main body and the main body portion and the lock operation member. Accordingly, an improved plunge-cut circular saw is provided.

Description

Technical Field

[0001] This invention relates to a plucking-type portable processing machine. Background Technology

[0002] Previously, various portable machining tools known as "cut-in" types (e.g., circular saws, grooving cutters, grooving planers, etc.) were known. For example, a cut-in circular saw (hereinafter, also simply a circular saw) has a base and a main body. The base is generally rectangular and has a contact surface for contacting the workpiece being cut. The main body has an electric motor and a cutting tool that is driven to rotate by the electric motor. The cutting tool is housed within a housing in a state where a force-applying component applies force upwards (the position of the cutting tool at this time is also referred to as the top dead center).

[0003] When using the circular saw, the user positions the saw at the starting position of the cut, with the base's contact surface against the workpiece. Then, while the saw is rotating, the user moves it downwards as far as possible from its top dead center (this position is also called the bottom dead center). At this point, the lower part of the saw protrudes downwards from the base, beginning to cut the workpiece. The user then moves the circular saw forward to the ending position while maintaining the saw's position at the bottom dead center. Finally, after stopping the saw's rotation, the user returns it to its top dead center. This cutting method is called plunge cutting.

[0004] In this type of cutting-in circular saw, an opening and closing cover is sometimes used to change the tool. For example, Patent Document 1 below discloses a cutting-in circular saw in which the side of the cover (the surface that is approximately orthogonal to the axis of rotation of the tool) can be hinged open with the bottom of the cover as the fulcrum. [Existing technical documents] [Patent Literature]

[0005] Patent Document 1: German Patent Publication No. 102007011168 Summary of the Invention [The technical problem that the invention aims to solve]

[0006] However, there is room for improvement in existing hand-feed portable machining centers. One example of such improvement is enhancing the ease of tool changing. [Technical solutions used to solve technical problems]

[0007] This specification discloses a portable machining machine. The portable machining machine may have a main body, a cover, an opening and closing mechanism, and a locking mechanism. The main body has a motor configured to provide rotational driving force to a cutting tool. The cover is used to at least partially cover the cutting tool and has a cover body and an openable / closable door. The opening and closing mechanism is supported by the cover body and configured to open and close the door. The locking mechanism is supported by one of the cover body and the main body in a displaceable manner and configured to lock the opening and closing mechanism in a closed state. The main body may be configured to be displaceable relative to the cover between a first position where the cutting tool is entirely housed within the cover and a second position where the cutting tool is partially exposed outside the cover. The locking mechanism may be configured to be displaceable by manual operation between a blocking position where the opening and closing mechanism prevents the door from opening and a permissive position where the opening and closing mechanism allows the door to open. The portable processing machine can be configured such that when the main body is in the first position, the locking operation mechanism is allowed to move from the blocking position to the allowing position, and when the main body is in a position other than the first position, the locking operation mechanism is prohibited from moving from the blocking position to the allowing position by contact between the cover body and the other part of the main body and the locking operation member.

[0008] According to the above structure, when the main body is in a position other than the first position, the locking mechanism is prevented from moving from the blocking position to the permissible position by contact between the cover body and the other part of the main body with the locking operation member. Therefore, damage to the portable processing machine can be prevented when the user operates the locking operation mechanism to open the cover door. Specifically, if the main body can move from a position other than the first position to the first position while the locking operation member is being moved to the permissible position, the cover body and the other part of the main body will collide forcefully with the locking operation member, potentially causing damage. However, according to the above structure, this will not happen. Therefore, the user does not need to operate carefully to avoid damage to the portable processing machine due to accidental operation when opening the door. This improves user convenience.

[0009] This specification also discloses a portable machining machine. The portable machining machine may have a main body, a cover, an opening and closing mechanism, and a locking mechanism. The main body has a motor configured to provide a rotational driving force to a tool. The cover is used to at least partially cover the tool and has a cover body and an openable / closable door. The opening and closing mechanism is supported by the cover body and configured to open and close the door. The locking mechanism is supported by one of the cover body and the main body in a displaceable manner and configured to lock the opening and closing mechanism in a closed state. The main body may be configured to be displaceable relative to the cover between a first position where the tool is completely housed within the cover and a second position where the tool is partially exposed outside the cover. The locking mechanism may be configured to be displaceable by manual operation between a blocking position where the opening and closing mechanism prevents the door from opening and an allowable position where the opening and closing mechanism allows the door to open. The portable processing machine can be configured such that when the main body is in the first position, the locking operation mechanism is allowed to move from the blocking position to the allowing position; when the main body is in a position other than the first position, the locking operation mechanism is prohibited from moving from the blocking position to the allowing position by contact between the cover body and the other part of the main body and the locking operation member; when the locking operation mechanism is in the blocking position, the main body is allowed to move from the first position to the second position; when the locking operation mechanism is in the allowing position, the main body is prohibited from moving from the first position to the second position by contact between the cover body and the other part of the main body and the locking operation member.

[0010] According to the above structure, the locking mechanism has a closed-state locking function that prevents the door from opening when the main body is in a position other than the first position, and a main body position locking function that prevents the main body from moving from the first position to the second position when the locking mechanism is in the allowed position. Therefore, compared to implementing each function separately with individual mechanisms, the portable processing machine can be miniaturized. As a result, the operability of the portable processing machine is improved, and the convenience for the user is enhanced.

[0011] This specification also discloses a portable machining machine. The portable machining machine may have a main body, a cover, an opening and closing mechanism, and a locking mechanism. The main body has a motor configured to provide rotational driving force to a cutting tool. The cover is used to at least partially cover the cutting tool and has a cover body and an openable / closable door. The opening and closing mechanism is supported by the cover body and configured to open and close the door. The locking mechanism is supported by one of the cover body and the main body in a displaceable manner and configured to lock the opening and closing mechanism in a closed state. The main body may be configured to be displaceable relative to the cover between a first position where the cutting tool is completely housed within the cover and a second position where the cutting tool is partially exposed outside the cover. The locking mechanism may be configured to be displaceable by manual operation between a blocking position where the opening and closing mechanism prevents the door from opening and an allowable position where the opening and closing mechanism allows the door to open. The main body may have a battery mounting section configured to house a battery that functions as a power source for the motor. The portable processing machine can be configured to perform an operation to move the locking operation member from the blocking position to the allowing position only when the main body is in the first position and the battery is not installed in the battery mounting part.

[0012] According to the above structure, the door can be opened by operating the locking mechanism only when the blade is completely contained within the cover and the motor cannot rotate. Therefore, the user does not need to be overly concerned about the blade accidentally protruding from the cover or accidentally rotating when opening the door, thus improving user convenience.

[0013] This specification also discloses a portable machining machine. The portable machining machine may have a main body comprising a motor, an output shaft, and a battery mounting portion, wherein the motor has a motor shaft; the output shaft is configured to output rotational driving force of the motor shaft to a tool; and the battery mounting portion is configured to accommodate a battery that functions as a power source for the motor. The portable machining machine may also have a cover, a locking member, and an operating member, wherein the cover is used to at least partially cover the tool; the locking member is configured to displace between an engaged position that engages with the motor shaft or the output shaft, preventing rotation of the motor shaft and output shaft when the motor is not driven, and a disengaged position that does not engage with either the motor shaft or the output shaft, allowing rotation of the motor shaft and output shaft; and the operating member is pressed by the battery when the battery is installed in the battery mounting portion, displacing from an initial position to a pressed position. The main body may be configured to displace relative to the cover between a first position in which the tool is completely contained within the cover and a second position in which the tool is partially exposed outside the cover. The engaging component and the operating component can be configured to interact with each other in such a way that the engaging component is in the engaging position when the operating component is in the initial position, and in the non-engaged position when the operating component is in the pressed position.

[0014] Based on the above structure, simply removing the battery allows the locking component to engage with the motor shaft or output shaft, thereby preventing rotation of the motor shaft or output shaft. Therefore, by simply removing the battery, rotation of the output shaft can be prevented during tool changes, making tool changes easy. This significantly improves user convenience. Attached Figure Description

[0015] Figure 1 This is a perspective view showing an example of the circular saw according to the first embodiment, with the main body at the top dead center. Figure 2 This is a 3D view of a circular saw, with the main body at the bottom dead center. Figure 3 This is a 3D view of a circular saw, with the main body at the top dead center. Figure 4 This is a 3D view of a circular saw, with the main body at the bottom dead center. Figure 5 This is a 3D view of a circular saw, with the main body at the top dead center. Figure 6 This is a magnified 3D view of the circular saw with part of the cover removed, showing the locking operation component in the blocking position. Figure 7 This is a magnified 3D view of the circular saw with part of the cover removed, showing the locking operating parts in the permitted position. Figure 8 It is a 3D view of a circular saw with the door open. Figure 9 It is a 3D view of the locking mechanism. Figure 10 It is a 3D view of a part of the circular saw after some components have been disassembled. Figure 11 This is a cross-sectional view showing the positional relationship between the locking mechanism and the gearbox. The main body is located at the top dead center, and the locking mechanism is in the blocking position. Figure 12 This is a cross-sectional view showing the positional relationship between the locking mechanism and the gearbox. The main body is located at the top dead center, and the locking mechanism is located in the permissible position. Figure 13 This is a cross-sectional view showing the positional relationship between the locking mechanism and the gearbox. The main body is located at the bottom dead center, and the locking mechanism is in the blocking position. Figure 14 This is a longitudinal sectional view of a circular saw, with the locking mechanism in the blocking position. Figure 15 This is a longitudinal section view of the circular saw, with the locking mechanism in the permissible position. Figure 16 This is the left view of a circular saw without a battery installed. Figure 17 This is a left view of a circular saw with a battery installed. Figure 18 This is a longitudinal sectional view of a circular saw, with the engaging component in the engaging position. Figure 19 This is a longitudinal sectional view of a circular saw, with the engaging component in the non-engaged position. Figure 20 This is a longitudinal sectional view of a circular saw. Figure 21 This is a longitudinal sectional view of a circular saw showing the main body and cover in an untilted state. Figure 22 This is a longitudinal sectional view of a circular saw showing the main body and cover tilted to their maximum tilt angle. Figure 23 This is a three-dimensional view of the auxiliary cover with the main body and the cover in an untilted state. Figure 24 It is a three-dimensional view of the auxiliary cover with the main body and the cover tilted to the maximum tilt angle. Figure 25 This is a three-dimensional view of the auxiliary cover with the main body and the cover in an untilted state. Figure 26 This is a top view of the base. Figure 27 It is along Figure 26 A sectional view of AA. Figure 28 This is a schematic diagram showing the relationship between the tilt of the cover body and cover components and the amount of movement of the cover components. Figure 29 This is a perspective view of the gearbox according to the second embodiment. Figure 30 This is a cross-sectional view showing the positional relationship between the locking mechanism and the gearbox. The main body is at the top dead center, and the locking mechanism is in the blocking position. Figure 31 This is a cross-sectional view showing the positional relationship between the locking mechanism and the gearbox. The main body is at the top dead center, and the locking mechanism is in the permissible position. Figure 32 This is a cross-sectional view showing the positional relationship between the locking mechanism and the gearbox. The main body is at the bottom dead center, and the locking mechanism is in the blocking position. [Explanation of reference numerals in the attached figures] 10, 110: Circular saw; 20: Base; 21: Lower surface; 22: Support shaft; 23: Torsion spring; 24, 25: Angular contact plate; 26: Angular contact element; 27: Trunnion; 28, 29: Wing screw; 30: Main body; 31: Motor housing; 32: Handle; 33: Electric motor; 34: Motor shaft; 35: Saw blade; 36: Flange; 37: Through hole; 38: Trigger; 39: Locking pin; 40: Release button; 41: Stop; 42: Output shaft; 43: Reduction gear; 45: Battery; 46: Battery mounting section; 47: Terminal; 50: Cover; 51: Recess; 52: Cover body; 52a: Inclined part; 53: Door; 54: Hinge mechanism; 55: Engaging part; 56: Through hole; 57: Protrusion; 58: Angle switching knob; 60, 160: Gearbox; 61, 161: First abutted part; 62, 162: Clearance part; 63, 163: Recess; 64, 164: Second abutted part; 70: Opening and closing mechanism; 71: Engaging part; 72: First engaging piece; 73: Second engaging piece; 74: Screw; 7 5: Compression spring; 76: Locking component; 77: Engaging part; 78: Pressed part; 79: Step; 80, 180: Locking operating mechanism; 81: Operating part; 82: Base; 83: Connecting part; 84: Arm; 85: Abutting part; 90: Operating component; 91: Knob; 92: Shaft; 93: Pressing part; 94: Engaging component; 95: Ring-shaped part; 96: Engaging part; 97: Pressed part; 98: Compression spring; 99: Pin; 181: Operating lever; 182: Cam; 183: Locking lever; 184: Abutting part 500: Auxiliary cover; 510: Cover component; 511: Part 1; 512: Part 2; 513: Part 3; 514, 515: Abutment part; 516: Rib; 520: Support component; 520a: First support part; 520b: Second support part; 530a, 530b: Hinge mechanism; AX1: Rotation axis; AX2: Swing axis; AX3: Pivot axis; AX4: First pivot axis; AX5: Second pivot axis; AX6: First tilt axis; AX7: Second tilt axis. Detailed Implementation

[0016] The following describes in detail representative and non-limiting examples of the invention with reference to the accompanying drawings. This detailed description is merely intended to demonstrate to those skilled in the art the preferred embodiments for carrying out the invention, and is not intended to limit the scope of the invention. Furthermore, to provide further improved apparatus, methods of manufacturing, and methods of use, the additional features and technical solutions disclosed below may be used alone or in combination with other technical features or solutions.

[0017] Furthermore, the combinations of features or processes disclosed in the following detailed description are not, in the broadest sense, essential for carrying out the invention, but are merely descriptions for illustrating representative specific examples of the invention. Moreover, when providing additional and useful embodiments of the invention, it is not necessary to combine the various technical features of the above and below representative examples and the various technical features described in the technical solutions in the order described herein or in the specific examples listed.

[0018] All technical features described in this specification and / or technical solution are intended to be disclosed separately and independently, as limitations on the disclosure at the time of application and on specific matters of the technical solution, outside the structure of the technical features described in the embodiments and / or technical solutions. Furthermore, the description of all numerical ranges and groups or categories is intended to disclose their intermediate structures as limitations on the disclosure at the time of application and on specific matters of the technical solution.

[0019] In one or more embodiments, the locking mechanism may have an abutment portion that protrudes toward the other of the cover body and the main body portion, and is configured to be displaceable between a blocking position and a permissible position. The other of the cover body and the main body portion may have a first abutted portion and a strip-shaped clearance portion, wherein, when the main body portion is in a position other than the first position, the first abutted portion abuts against the abutment portion in a direction that prevents the abutment portion from displaced from the blocking position to the permissible position; the clearance portion is arranged adjacent to the first abutted portion and is located inside the first abutted portion in the protruding direction of the abutment portion. Alternatively, when the main body portion is in the first position, the abutment portion is located opposite the clearance portion, and does not abut against the first abutted portion in a direction that prevents the abutment portion from displaced from the blocking position to the permissible position. According to this structure, when the main body is in a position other than the first position, the abutting part abuts against the first abutted part, which can reliably prevent the door from being opened by the locking operation mechanism. When the main body is in the first position, the abutting part is in a position facing the avoidance part, thereby enabling the door to be opened.

[0020] In one or more embodiments, the locking mechanism can be supported by the cover body. According to this structure, both the opening / closing mechanism and the locking mechanism are supported by the cover body. Therefore, the opening / closing mechanism and the locking mechanism can be efficiently linked. In other words, the number of components between the opening / closing mechanism and the locking mechanism can be reduced or eliminated.

[0021] In one or more embodiments, the cover may have a hinge mechanism for opening and closing the door. This hinge mechanism may be positioned in front of or behind the rotation axis of the tool, when the side being machined by the tool is defined as the front and the opposite direction as the rear. The hinge mechanism may be oriented such that the rotational movement of the door performed by the hinge mechanism includes a horizontal component, as is the case with the portable machining machine. According to this structure, since the rotational movement of the door performed by the hinge mechanism includes a horizontal component (in other words, a component other than the vertical component), it is possible to prevent the door from being violently and excessively opened against the user's intention due to its own weight. Therefore, the convenience of opening and closing the door is improved.

[0022] In one or more embodiments, the hinge mechanism can be oriented such that the door rotation action includes a vertical component as in the use of a portable processing machine, and the door opening action includes a component in the vertical direction. According to this structure, since the door opening operation is accompanied by rotation against the door's own weight, it is possible to further suppress the door from being violently and excessively opened against the user's intention.

[0023] In one or more embodiments, the hinge mechanism can be positioned in front of the tool's axis of rotation. The opening / closing mechanism and the locking mechanism can be positioned behind the tool's axis of rotation. When using this portable machining center, the user is located behind the machine; therefore, according to this structure, the locking mechanism is positioned near the user. This makes it easy for the user to operate the locking mechanism. Furthermore, by reducing the distance between the opening / closing mechanism and the locking mechanism, they can be linked in a compact structure. Additionally, by increasing the distance between the opening / closing mechanism and the hinge mechanism, more reliable opening and closing of the door can be achieved.

[0024] In one or more embodiments, the main body can be configured to swing relative to the cover between a first position and a second position about a swing axis. The abutting portion and the first abutted portion can be positioned closer to the swing axis relative to the rotation axis of the tool. According to this structure, since the distance between the abutting portion and the swing axis and the distance between the first abutted portion and the swing axis are reduced, the circumferential range of the first abutted portion that should be configured to properly function within the entire swing angle range of the main body can be reduced. That is, the first abutted portion can be miniaturized.

[0025] In one or more embodiments, the first abutted portion may be formed in an arc shape. The other of the cover body and the main body portion may have a recess that is recessed further than the first abutted portion and formed along the first abutted portion in an adjacent manner. It can be that when the abutted portion is in the blocking position and the main body portion is displaced between the first and second positions, the abutted portion faces the recess while the main body portion moves relative to the abutted portion. According to this structure, when the abutted portion (in other words, the locking mechanism) is in the blocking position, interference between the other of the cover body and the main body portion and the abutted portion can be reliably prevented by the recess. Therefore, the main body portion can reliably swing between the first and second positions.

[0026] In one or more embodiments, the other of the cover body and the main body portion may have a second abutting portion, which is formed in a strip shape along the avoidance portion, and when the abutting portion is in the permissible position, it abuts against the abutting portion in a direction that prevents the main body portion from displacing from the first position to the second position. According to this structure, the locking operating mechanism has a closed-state locking function that prevents the door from opening when the main body portion is in a position other than the first position, and a main body position locking function that prevents the main body portion from displacing from the first position to the second position when the locking operating mechanism is in the permissible position. Therefore, compared to the case where each function is implemented separately by a separate mechanism, the portable processing machine can be miniaturized. As a result, the operability of the portable processing machine is improved, thereby increasing user convenience.

[0027] In one or more embodiments, the opening and closing mechanism may have an engaging portion configured to be displaceable between a closed position and an open position, wherein the closed position is a position in which the engaging portion engages with the door to hold the door in a closed state; and the open position is a position in which the engaging portion is not engaged with the door to allow the door to be opened. The engaging portion can be operablely connected to a locking mechanism such that the engaging portion is in the closed position when the locking mechanism is in the blocking position and in the open position when the locking mechanism is in the allowing position. According to this structure, the opening and closing mechanism and the locking mechanism can be appropriately linked with a simple structure.

[0028] In one or more embodiments, the opening and closing mechanism may have a force-applying member and a locking member. The locking member is force-applied by the force-applying member in the opening direction of the door and is configured to be displaceable in the opening and closing direction of the door. The locking member may be configured such that, when the door is closed, it is pressed against the door against the applied force and is located in a position that does not interfere with the displacement of the engaging part from the closed position to the open position; and when the door is open, it is pressed by the force applied by the force-applying member and is located in a position that interferes with the displacement of the engaging part from the open position to the closed position. According to this structure, in the open state, by manually pressing the locking member to prevent it from displacing to a position that does not interfere with the displacement of the engaging part from the closed position to the open position, the displacement of the engaging part from the open position to the closed position (in other words, the displacement of the locking operation member from the allowed position to the blocked position) can be prevented. That is, in the open state, returning the locking operation member from the allowed position to the blocked position prevents the use of portable machining machines. Therefore, the user does not need to pay attention to avoid the tool rotating unintended when opening the door. Thus, user convenience is improved.

[0029] In one or more embodiments, the main body may have a battery mounting section configured to slide to mount a battery that functions as a power source for the motor. The locking mechanism may be configured to move in a manner that, when the locking mechanism is in the allowable position, it is positioned to interfere with the sliding trajectory of the battery when it is mounted in the battery mounting section, and when the locking mechanism is in the blocking position, it is positioned to avoid interfering with the sliding trajectory. According to this structure, when the locking mechanism is in the allowable position, the battery cannot be mounted in the battery mounting section (and consequently, the blade cannot rotate). Therefore, when opening the door, the user does not need to pay attention to prevent the blade from rotating unintentionally.

[0030] In one or more embodiments, the locking mechanism may have a pivotable operating lever. This structure provides stable operability and improves user convenience.

[0031] In one or more embodiments, the locking mechanism may have an operating lever and a locking lever, wherein the operating lever is pivotable about a first pivot axis; the locking lever is at least temporarily pressed by the operating lever as it pivots, and at least temporarily engaged with the operating lever, thereby enabling it to pivot about a second pivot axis different from the first pivot axis. When the main body is in a position other than the first position, the locking lever abuts against the other of the cover body and the main body to prevent displacement of the locking mechanism from the blocked position to the allowed position. According to this structure, the design freedom of the locking mechanism can be increased, and operability can be improved.

[0032] In one or more embodiments, the main body may have a battery mounting section configured to allow the sliding mounting of a battery that functions as a power source for the motor. The portable machining center can be configured to allow the operation of displacing the locking mechanism from a blocking position to an allowing position only when the main body is in the first position and the battery is not mounted in the battery mounting section. According to this structure, the user cannot open the door unless the tool is completely contained within the cover and the battery is not mounted in the battery mounting section. Therefore, the user does not need to worry about the tool accidentally protruding from the cover or accidentally rotating when opening the door.

[0033] Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

[0034] The first embodiment of the present invention will now be described. In this embodiment, a cutting-in circular saw 10 (hereinafter simply referred to as the circular saw 10) is shown as an example of a portable processing machine. In the following description, for ease of explanation, the side in which the circular saw 10 travels when the user holds it to cut the workpiece (the direction of cutting) is defined as the front side of the circular saw 10, and the opposite side is defined as the rear side of the circular saw 10. Furthermore, the side located vertically above is defined as the upper side of the circular saw 10, and the opposite side is defined as the lower side of the circular saw 10. Additionally, the direction orthogonal to the front-back direction and the vertical direction is defined as the left-right direction of the circular saw 10. In the left-right direction, the right side when viewing the front from the rear is defined as the right side of the circular saw 10, and the opposite side is defined as the left side of the circular saw 10.

[0035] First, the main reference Figures 1-5 This describes the general structure of the circular saw 10. For example... Figures 1-5 As shown, the circular saw 10 has a base 20, a main body 30, and a cover 50. The base 20 is used to abut against the upper surface of the workpiece being cut. The base 20 has a generally rectangular shape. The length direction of the base 20 is the front-to-back direction. The base 20 has a lower surface 21, which abuts against the upper surface of the workpiece being cut when cutting it. However, the base 20 is not necessarily configured such that the lower surface 21 abuts against the upper surface of the workpiece being cut. When a long ruler is used with the circular saw 10 for straight cutting of the workpiece, the base 20 can be configured such that the lower surface 21 abuts against the upper surface of the long ruler.

[0036] The main body 30 is positioned on the upper side, substantially relative to the base 20. The main body 30 has a structure for housing an electric motor 33 (see reference). Figure 21 The electric motor 33 has a motor housing 31 and a handle 32 for user gripping. The electric motor 33 has a motor shaft 34. The motor shaft 34 of the electric motor 33 is connected via a gearbox 60 (see reference 60). Figure 3 The reduction gear 43 inside (refer to) Figure 21 ) and output shaft 42 (refer to Figure 21 ) To the saw blade 35 (refer to) Figure 2 and Figure 4 The gearbox 60 provides rotational drive force. The saw blade 35 uses a circular saw blade known as a chip saw. In this embodiment, the gearbox 60 is integrally formed with the motor housing 31.

[0037] The cover 50 is positioned above the base 20 and on the right edge of the base 20. The cover 50 is secured to the base 20 via corner contacts 26 and corner contact plates 24, 25 (details described later). The saw blade 35 has a disc shape and is at least partially housed within the cover 50. Specifically, an arc-shaped through-hole 37 is formed on the left side of the cover 50, extending through the left side in a left-right direction (see reference). Figure 3 The output shaft 42 passes through the through-hole 37 and extends into the interior of the cover 50. Inside the cover 50, it extends through the flange 36 (see reference). Figure 8 A saw blade 35 is mounted on the top of the output shaft 42. Thus, the saw blade 35 receives power from the battery mounting section 46 (see reference 42). Figure 16 The battery 45 (see reference) serves as a power source. Figure 3 and Figure 4 When powered by an electric motor 33, the motor rotates along the axis AX1 (refer to...) Figure 6 Centered on the output shaft 42, it rotates integrally with the handle 32. A trigger 38 (see reference 32) is provided at the front end of the handle 32 for starting and stopping the electric motor 33. Figure 4 ).

[0038] like Figure 16 As shown, the battery mounting portion 46 is located at the rear and lower part of the main body 30. The battery mounting portion 46 can slide to mount the battery 45. Specifically, the battery mounting portion 46 has a plurality of terminals 47 extending in a guide rail shape. When the battery 45 is mounted on the battery mounting portion 46 by sliding it in the direction in which the plurality of terminals 47 extend, the plurality of terminals 47 are electrically connected to a plurality of terminals (not shown) of the battery 45.

[0039] Such a main body 30 is configured such that a support shaft 22 (see reference) can be supported relative to the base 20 and the cover 50 by the base 20 (which is integrally formed with the trunnion 27 by the supported corner contact member 26). Figure 3 The main body 30 is oscillating around a central axis. The support shaft 22 (in other words, the oscillation axis AX2 of the main body 30) is parallel to the rotation axis AX1. Specifically, the main body 30 can displace between two positions, wherein these two positions are: [e.g., at...] Figure 1 and Figure 3As shown, the entire saw blade 35 is positioned above the lower surface 21 of the base 20 and is entirely housed within the cover 50 (also referred to as the top dead center); Figure 2 and Figure 4 As shown, the saw blade 35 protrudes downward beyond the lower surface 21 of the base 20, and the saw blade 35 is partially exposed outside the cover 50 (this is also called the lower dead center when the saw blade 35 is in the state of protruding the most from the lower surface 21). Furthermore, the fact that the saw blade 35 is "entirely" housed within the cover 50 means that, when viewed in a direction extending from the rotation axis AX1, the entire saw blade 35 is not located outside the outer contour of the cover 50.

[0040] A torsion spring 23 is arranged around the support shaft 22. The torsion spring 23 always applies force to the main body 30 from the bottom dead center side to the top dead center side. Therefore, the top dead center becomes the initial position of the main body 30.

[0041] The position of the top dead center is determined by the locking pin 39 extending from the gearbox 60 to the cover 50 (see reference). Figure 3 ) and the recess 51 formed on the left side of the cover 50 (more specifically, the cover body 52 described later) (see Figure 4 The locking pin 39 is always forced to the right (i.e., the cover 50 side) by a force-applying component (not shown). When the locking pin 39 is in the position facing the recess 51, the tip of the locking pin 39 is inserted into the recess 51. Thus, the cover 50 is locked at the upper stop. When the user operates the release button 40 (see reference...) Figure 4 When the user presses the main body 30 downwards, the locking pin 39 retracts to the left, overcoming the force applied by the force-applying component. This releases the locking pin 39 from the recess 51. In this state, when the user presses the main body 30 downwards, the main body 30 displaces downwards, overcoming the force applied by the torsion spring 23.

[0042] The position of the downward moving end of the main body 30 (the lower limit of its movable position) is determined by the stop member 41 (see reference). Figure 3 and Figure 4 The user can press the main body 30 down until the gearbox 60 abuts against the stop 41. The stop 41 is configured to change its position in the vertical direction. Therefore, the user can change the position of the stop 41 (i.e., the position of the downward moving end) according to the desired cutting depth. The lower stop point mentioned above refers to the position of the main body 30 when the stop 41 is positioned at its lowest point and the main body 30 is lowered to the downward moving end. Furthermore, in the following description, when the stop 41 is positioned at its lowest point, the "downward moving end" will also be referred to as the "lower stop point". When the main body 30 is in the downward moving end state, when the user releases the force that presses the main body 30 down, the main body 30 returns to the upper stop point by the force applied by the torsion spring 23.

[0043] Furthermore, the main body 30 and the cover 50 are configured to tilt relative to the base 20. Specifically, corner contact plates 24 and 25 are mounted on the base 20. The corner contact plates 24 and 25 are respectively positioned about a first tilting axis AX6 (see reference). Figure 22 The corner contact plate 24 is fixed to the front edge of the base 20, and the corner contact plate 25 is fixed to the rear edge of the base 20. The front and rear portions of the corner contact 26 have approximately the same arc shape as the corner contact plates 24 and 25, and are arranged to overlap with the corner contact plates 24 and 25 respectively. The portion between the front and rear portions of the corner contact 26 has a generally flat shape extending in both the front-rear and left-right directions with the front-rear direction as its length direction (see reference). Figure 3 As is well known, when the wing screws 28 and 29 installed on the corner contact plates 24 and 25 are loosened, the fixing relationship between the corner contact member 26 fixed to the cover 50 and the corner contact plates 24 and 25 is released, allowing the main body 30 and the cover 50 to tilt relative to the base 20. Then, when the wing screws 28 and 29 are tightened at the desired tilt position, the fixing relationship between the corner contact member 26 fixed to the cover 50 and the corner contact plates 24 and 25 is determined, and the tilt position of the main body 30 and the cover 50 relative to the base 20 is fixed. An angle switching knob 58 is provided on the front surface of the corner contact plate 24. By rotating the angle switching knob 58, the limit angle for tilting the main body 30 and the cover 50 can be switched to 22.5 degrees, 45 degrees, or 60 degrees. In the state where the main body 30 and the cover 50 are tilted relative to the base 20, the main body 30 can also be displaced between the upper dead point and the lower dead point in the same way as described above.

[0044] Next, the structure of the saw blade 35 used to replace the circular saw 10 will be explained. For example... Figure 1 and Figure 8 As shown, the cover 50 has a cover body 52 and an openable and closable door 53. The door 53 functions as part of the right side of the cover 50. The door 53 has a size that covers approximately half of the upper and lower portions of the saw blade 35 when the body 30 is at its top dead center. Therefore, as Figure 8 As shown, when the door 53 is opened, the flange 36, which secures the saw blade 35 to the output shaft 42 in a manner that clamps the saw blade 35 in the left-right direction, is fully exposed. Therefore, the flange 36 can be loosened using a socket wrench or similar tool, allowing for easy replacement of the saw blade 35.

[0045] like Figure 8As shown, the door 53 can be opened and closed by a hinge mechanism 54 consisting of a part of the cover body 52 and a part of the door 53. In this embodiment, the hinge mechanism 54 is disposed in front of the rotation axis AX1 of the saw blade 35. Furthermore, the pivot axis of the door 53 of the hinge mechanism 54 is oriented in a direction intersecting both the horizontal direction (a direction orthogonal to the vertical direction) and the vertical direction. Therefore, the rotational movement of the door 53 includes a horizontal component. By including a horizontal component in the rotational movement of the door 53, it is possible to prevent the door 53 from opening violently and excessively against the user's intention due to its own weight. Moreover, the hinge mechanism 54 is oriented such that the rotational movement of the door 53 includes a vertical component and the opening movement of the door 53 includes an upward component. Therefore, the user's operation of opening the door 53 is accompanied by rotation overcoming the weight of the door 53. Therefore, it is possible to further prevent the door 53 from opening violently and excessively against the user's intention. The same effect can be obtained when the hinge mechanism 54 is disposed behind the rotation axis AX1.

[0046] Furthermore, the circular saw 10 includes an opening / closing mechanism 70 for opening and closing the door 53 and a locking operation mechanism 80 capable of locking the opening / closing mechanism 70 in a closed state (i.e., the door 53 is closed). The opening / closing mechanism 70 and the locking operation mechanism 80 will be described below. Figure 6 and Figure 7 As shown, the opening and closing mechanism 70 has an engaging portion 71 for holding the door 53 in the closed state. The engaging portion 71 is pivotally supported on the left side portion of the cover body 52. ​​The engaging portion 71 can be in the closed position (see reference 52). Figure 6 The displacement between the closed position and the open position, wherein the closed position is the position in which the engaging part 71 engages with the door 53 to keep the door 53 in a closed state; and the open position is the position in which the engaging part 71 does not engage with the door 53 to make the door 53 openable.

[0047] The engaging portion 71 has a first engaging tab 72 and a second engaging tab 73 protruding radially outward toward its pivot axis AX3. For example... Figure 14 and Figure 15 As shown, door 53 has an engaging portion 55 that protrudes in an L-shape from its inner surface (left surface) to the left (saw blade 35 side). When the engaging portion 71 is in the closed position (see reference...), Figure 6 When, such as Figure 14 As shown, the first engaging piece 72 of the engaging portion 71 engages with the top end (the portion extending vertically) of the engaging portion 55 of the door 53 in the left-right direction. Therefore, the door 53 cannot move in the opening direction (to the right) and remains in the closed state. On the other hand, when the engaging portion 71 is in the open position (see reference...), Figure 7 When, such as Figure 15As shown, the first engaging piece 72 of the engaging part 71 does not engage with the engaging part 55 of the door 53 in the left-right direction. Therefore, the door 53 can be opened.

[0048] This locking part 71 is configured to be linked with the locking operation mechanism 80. For example... Figure 9 As shown, the locking mechanism 80 includes an operating part 81, a base 82, a connecting part 83, an arm 84, and an abutment part 85. The base 82 has a generally cylindrical shape. The operating part 81, for manual operation by the user, is a generally L-shaped lever. The operating part 81 extends radially outward from the base 82, then bends and extends to the left. The connecting part 83, for connection with the engaging part 71, extends cylindrically from the base 82 to the right. Figure 14 and Figure 15 As shown, the connecting part 83 is connected to the engaging part 71 by a screw 74. Since the connecting part 83 is arranged in a through hole penetrating the cover body 52, the engaging part 71 and the locking operating mechanism 80 are pivotally supported by the cover body 52 around the pivot axis AX3 in an integrated state. The arm part 84 extends radially outward from the base 82 at a different circumferential position than the operating part 81. An abutment part 85 is formed at the top of the arm part 84, which protrudes cylindrically to the left (gearbox 60 of the main body 30).

[0049] Such a locking mechanism 80 is configured to be able to be manually operated to a stopped position where the opening and closing mechanism 70 prevents the door 53 from opening (see reference). Figure 5 and Figure 6 ) and the permitted position of the door 53 being opened by the opening and closing mechanism 70 (refer to Figure 7 The locking mechanism 80 is pivotally integrated with the engaging part 71, as described above. When the locking mechanism 80 is in the blocking position, the engaging part 71 is in the closed position, and when the locking mechanism 80 is in the allowing position, the engaging part 71 is in the open position. Therefore, the user can open the door 53 only by displacing the locking mechanism 80 from the blocking position (which is the initial position) to the allowing position.

[0050] like Figure 6 As shown, with the main body 30 at its upper stop and the locking operation mechanism 80 in the blocking position, the locking operation mechanism 80 (more specifically, the operation part 81) is located below the sliding track for slidingly mounting the battery 45 onto the battery mounting part 46. Therefore, the battery 45 can be mounted onto the battery mounting part 46 without interfering with the sliding track. On the other hand, as... Figure 7As shown, when the main body 30 is at its top dead center and the locking mechanism 80 is in the permitted position, the sliding trajectory of the locking mechanism 80 (more specifically, the operating part 81) interferes with that of the battery 45. Therefore, the battery 45 cannot be installed in the battery mounting part 46. That is, when the locking mechanism 80 is in the permitted position allowing the door 53 to be opened, no power is supplied to the electric motor 33. Therefore, when opening the door 53, the user does not need to ensure that the saw blade 35 does not rotate unintended.

[0051] like Figure 5 As shown, when the locking mechanism 80 is in the blocked position, with the battery 45 installed in the battery mounting portion 46, the top of the operating portion 81 of the locking mechanism 80 is located below the battery 45. Therefore, even if the user wants to move the locking mechanism 80 from the blocked position (see reference...), the top of the operating portion 81 of the locking mechanism 80 is located below the battery 45. Figure 5 To the permitted location (refer to) Figure 7 When the battery is installed in the battery mounting section 46, the user cannot move the locking mechanism 80 from the blocking position to the allowing position. On the other hand, due to… Figure 6 and Figure 7 As clearly shown, with the battery 45 removed, the locking mechanism 80 can move from the blocked position to the allowed position without interfering with other components. That is, unless the circular saw 10 is unusable due to the lack of power to the electric motor 33, the user cannot operate the locking mechanism 80 to open the door 53. Therefore, the user does not need to ensure that the saw blade 35 rotates unintended while opening and closing the door 53.

[0052] Furthermore, the locking operation mechanism 80 is configured such that it allows displacement from the blocking position to the permitted position only when the main body 30 is at the top dead center, and prohibits displacement from the blocking position to the permitted position when the main body 30 is at any position other than the top dead center. Hereinafter, refer to... Figures 10-13 To illustrate this structure. For example... Figure 10 As shown, a first abutting portion 61, a clearance portion 62, a recess 63 and a second abutting portion 64 are formed on the right surface of the gearbox 60.

[0053] The clearance portion 62 and the recess 63 are recessed to the left to form a groove. The clearance portion 62 and the recess 63 are continuous and have an overall shape that is roughly V-shaped (more precisely, a V-shaped shape formed by arcs). The first abutting portion 61 is an arc-shaped portion adjacent to the recess 63, forming a sidewall of the recess 63 (the sidewall near the clearance portion 62) along the recess 63. The second abutting portion 64 is an arc-shaped portion adjacent to the clearance portion 62, forming a sidewall of the clearance portion 62 (the sidewall near the recess 63) along the clearance portion 62. The clearance portion 62 and the recess 63 are located to the left and inward compared to the first abutting portion 61 and the second abutting portion 64.

[0054] The abutment portion 85 of the locking operation mechanism 80 (which protrudes in the recessed direction of the clearance portion 62 and the recess 63) is housed within the clearance portion 62 and the recess 63. In other words, the abutment portion 85 is always located in a position facing either the clearance portion 62 or the recess 63 in the left-right direction. The position of the abutment portion 85 within the clearance portion 62 and the recess 63 varies depending on the swing position of the main body portion 30 and the pivot position of the locking operation mechanism 80.

[0055] Specifically, such as Figure 11 As shown, when the main body 30 is at its upper stop and the locking operation mechanism 80 is in the blocking position (in other words, the opening / closing mechanism 70 is in the closed position), the abutment portion 85 is positioned facing the base end of the clearance portion 62 (the connection portion connected to the recess 63). In this state, the locking operation mechanism 80 (in other words, the abutment portion 85) is allowed to move from the blocking position to the allowed position. Specifically, when the user moves the locking operation mechanism 80 from the blocking position to the allowed position... Figure 11 The indicated blocking position is shifted to Figure 12 When the permitted position is shown, the contact portion 85 is as follows Figure 12 As shown, it moves from a position facing the base end of the relief portion 62 to a position facing the top end of the relief portion 62 (the end opposite to the connecting portion connected to the recess 63). Although the relief portion 62 is adjacent to the first abutted portion 61, it is located in a position that avoids the first abutted portion 61. Therefore, the movement of the abutting portion 85 is not hindered by abutting the first abutted portion 61.

[0056] Figure 12 The state shown indicates that when the main body 30 is at the top dead center and the locking operation mechanism 80 is in the allowable position, the main body 30 is prohibited from moving from the top dead center to the bottom dead center. Specifically, in Figure 12 In the shown state, even if the user wants to move the main body 30 downward to its lower limit, the second abutting part 64 will abut against the abutting part 85 in the direction that prevents such movement. Therefore, the user cannot move the main body 30 downward to its lower limit.

[0057] on the other hand, Figure 11 The state shown indicates that when the main body 30 is at the top dead center and the locking operation mechanism 80 is in the blocking position, the main body 30 is allowed to move from the top dead center to the bottom dead center. Specifically, in Figure 11 In the state shown, when the user moves the main body 30 to the lower stop point, the contact part 85... Figure 13 As shown, it moves relative to the top of the recess 63 to a position facing the top of the recess 63 (the end opposite to the connection part connected to the relief part 62).

[0058] Figure 13 The state shown indicates that when the main body 30 is in a position other than the top dead center and the locking operation mechanism 80 is in the blocking position, the locking operation mechanism 80 (in other words, the abutment part 85) is prohibited from displacing from the blocking position to the permissible position. Specifically, in Figure 13 In the shown state, even if the user wants to move the locking mechanism 80 from the blocked position to the allowed position, the abutting part 85 will abut against the first abutted part 61 in the direction that prevents the movement. Therefore, the user cannot move the locking mechanism 80 to the allowed position.

[0059] As clearly shown in the above description, according to the circular saw 10, the locking mechanism 80 can only be displaced from the initial blocking position to the permissible position to open the door 53 when the main body 30 is at the top dead center. Therefore, it prevents the main body 30 from moving from a position other than the top dead center to the top dead center while the locking mechanism 80 is displaced to the permissible position, thus avoiding a strong collision between the gearbox 60 and the locking mechanism 80, which could cause damage. Therefore, the user does not need to operate carefully to avoid damaging the circular saw 10 due to accidental operation when opening the door 53. This improves user convenience.

[0060] Furthermore, according to the circular saw 10, the main body 30 can only be displaced from the upper stop point to the lower stop point for cutting by the circular saw 10 when the locking mechanism 80 is in the blocking position (in other words, only when the door 53 cannot be opened). Therefore, the user can use the circular saw 10 without confirming whether the door 53 is open (or whether the door 53 is in a state where it can be opened). This improves user convenience.

[0061] Furthermore, the locking mechanism 80 can perform a closed-state locking function that prevents the door 53 from opening when the main body 30 is in a position other than the upper stop point, and a main body position locking function that prevents the main body 30 from moving from the upper stop point to the lower stop point when the locking mechanism 80 is in the allowed position. Therefore, compared to the case where these two functions are implemented separately by a separate mechanism, the circular saw 10 can be miniaturized.

[0062] Furthermore, since both the engaging part 71 of the opening / closing mechanism 70 and the locking operation mechanism 80 are supported by the cover body 52, the engaging part 71 and the locking operation mechanism 80 can be linked efficiently with fewer parts.

[0063] In addition, such as Figure 6 As shown, the engaging part 71 and the locking mechanism 80 are positioned behind the rotation axis AX1 of the saw blade 35, that is, close to the user's standing position when using the circular saw 10. Therefore, the user can easily operate the locking mechanism 80. Furthermore, because the distance between the engaging part 71 and the locking mechanism 80 is reduced, they can be linked in a compact structure. Moreover, the hinge mechanism 54 for opening and closing the door 53 is positioned in front of the rotation axis AX1 of the saw blade 35 (that is, away from the engaging part 71 and the locking mechanism 80). Therefore, the distance between the engaging part 71 and the hinge mechanism 54 can be increased, resulting in more reliable opening and closing of the door 53.

[0064] In addition, such as Figure 11 As shown, the abutting portion 85 and the first abutted portion 61 are positioned closer to the swing axis AX2 of the main body 30 than the rotation axis AX1 of the saw blade 35. In other words, the distance between the swing axis AX2 and the abutting portion 85, and the distance between the swing axis AX2 and the first abutted portion 61, are smaller than the distance between the rotation axis AX1 and the abutting portion 85, and the distance between the rotation axis AX1 and the first abutted portion 61. Therefore, the distance between the abutting portion 85 and the swing axis AX2, and the distance between the first abutted portion 61 and the swing axis AX2, are reduced. Therefore, the circumferential range of the swing axis AX2 of the first abutted portion 61, which should be positioned to properly function within the entire swing angle range of the main body 30, can be reduced. That is, the first abutted portion 61 can be made smaller.

[0065] The circular saw 10 also has an additional structure for preventing its use when the door 53 is open. This structure is described below. Figure 14 and Figure 15 As shown, the opening and closing mechanism 70 has a compression spring 75 and a locking member 76. (As indicated...) Figure 6 and Figure 7 As shown, the locking member 76 is disposed below the engaging portion 71 in a manner adjacent to the engaging portion 71. Furthermore, in Figure 6 The image shows the state after a portion of the cover body 52 (the right side portion disposed on the rear edge) has been removed, but in reality, as shown... Figure 8 As shown, this part is installed, and the locking part 76 can only be accessed from the right side of the cover body 52 through the through hole 56, but the engaging part 71 cannot be accessed.

[0066] like Figure 14 and Figure 15 As shown, the locking member 76 has an engaging portion 77 protruding upwards and a pressing portion 78 protruding cylindrically to the right. A step 79 is formed at the base end of the pressing portion 78. The locking member 76 is always subjected to force to the right (in other words, the opening direction of the door 53) by a compression spring 75 disposed in a compressed state between the left side of the cover body 52 and the locking member 76.

[0067] like Figure 14 As shown, when the door 53 is closed (when the door 53 is closed because the protrusion 57 provided on the door 53 enters the interior of the cover 50 through the through hole 56), the protrusion 57 overcomes the force applied by the compression spring 75 and presses the pressed part 78 toward the left. In this state, as Figure 6 and Figure 14 As shown, the engaging part 77 retracts to the left side of the engaging part 71 without interfering with the movement of the engaging part 71. Therefore, the engaging part 71, which is linked to the locking operation mechanism 80, can move from the closed position (see reference 80). Figure 6 ) Opening position (reference) Figure 7 Displacement.

[0068] On the other hand, when the engaging part 71 is in the closed position (refer to...) Figure 6 ) Opening position (reference) Figure 7 When the door 53 is displaced, the closed state held by the door 53 (in other words, the pressing force of the protrusion 57) is released. At this time, the locking member 76 is pressed to the right by the force applied by the compression spring 75, and displaces to the right until the step 79 abuts against the right inner surface of the cover body 52. ​​At this time, because the locking member 76 (more specifically, the pressed part 78) presses the door 53 to the right, the door 53 is closed as if... Figure 15 The displacement of the locking member 76 is as shown. Additionally, as... Figure 7 and Figure 15 As shown, with the displacement of the locking member 76, the engaging part 77 is positioned in the same horizontal direction as the engaging part 71. At this time, by Figure 7 As clearly shown, the engaging part 77 and the engaging part 71 are in the open position (refer to...) Figure 7 Towards the closed position (reference) Figure 6 The displacement of the door 53 causes interference. That is, even when the door 53 is slightly open, the engaging part 71 cannot move from the open position (see reference 53). Figure 7 Towards the closed position (reference) Figure 6 Displacement.

[0069] With this structure, the user cannot move the locking mechanism 80, which is linked to the locking part 71, from the allowed position to the blocked position when the door 53 is open. As long as the locking mechanism 80 is not in the blocked position, the main body 30 cannot be moved from the upper stop point to the lower stop point. Therefore, the user does not need to worry about the saw blade 35 accidentally protruding from the cover 50 when the door 53 is open, thus improving user convenience.

[0070] However, if the user inserts their finger into the through hole 56 and presses the pressed part 78 to the left, the locking part 76 will move to... Figure 14 As shown in the diagram, the main body 30 can be moved from the upper dead point to the lower dead point while maintaining this state. With this structure, the saw blade 35 can be moved to the lower dead point side while the battery 45 is removed, easily cleaning up chips and other debris present between the left side of the cover body 52 and the saw blade 35.

[0071] Furthermore, according to the above structure, when the engaging part 71 is displaced by the operation of the locking mechanism 80, the door 53 automatically opens slightly due to the force applied by the compression spring 75. Thus, as... Figure 15 As shown, a slight gap is created between the door 53 and the right outer surface of the cover body 52. ​​The user can easily open the door 53 by inserting their finger into this gap.

[0072] The circular saw 10 also has a structure for easily changing the saw blade 35. See below for reference. Figures 16-20 To illustrate this structure, the circular saw 10 has an operating part 90 and a locking part 94. For example... Figure 20 As shown, the operating component 90 includes a knob 91, a shaft 92, and a pressing part 93. The knob 91 is arranged to protrude outwards from the battery mounting part 46. The pressing part 93 is disposed inside the gearbox 60. The shaft 92 rotatably passes through the motor housing 31, connecting the knob 91 and the pressing part 93.

[0073] like Figure 16 and Figure 17 As shown, the knob 91 has an arc shape. The operating component 90 is located when the battery 45 is not installed in the battery mounting portion 46. Figure 16 The initial position shown is pivoted by the battery 45 when it is installed in the battery mounting part 46. Figure 17 The pressed position is shown. At this time, the shaft 92 and the pressing part 93, which are integrated with the knob 91, also pivot together with the knob 91.

[0074] The engaging component 94 is located inside the gearbox 60. For example... Figure 18 and Figure 19As shown, the engaging member 94 has an annular portion 95 at one end in its length direction and a pressed portion 97 at the other end. The annular portion 95 is configured such that the motor shaft 34 passes through a through hole formed inside the annular portion 95. The pressed portion 97 is a portion that protrudes to the left. An engaging portion 96 is formed at the other end of the annular portion 95, which has a through hole with a width significantly smaller than the through hole of the annular portion 95. Such an engaging member 94 is capable of engaging the motor shaft 34 in its length direction. Figure 18 The engagement position shown is... Figure 19 The displacement between the non-engaged positions shown is maintained by pin 99. The engaging member 94 is always subjected to force by a compression spring 98, which is configured in a compressed state between the gearbox 60 and the pressed part 97, toward the pressed part 97 in the direction of approaching the motor shaft 34 (in other words, toward the engaging position).

[0075] When the battery 45 is not installed in the battery mounting part 46, the engaging part 94 is located Figure 18 The engagement position is shown. At this time, the motor shaft 34 is engaged with the inner side of the engagement part 96, and the motor shaft 34 and the engagement part 96 are in an engaged state. Therefore, at least when the electric motor 33 is not driven, the rotation of the motor shaft 34 is prevented. At this time, although the shaft 92 abuts against the pressed part 97, it does not press the pressed part 97.

[0076] On the other hand, when the battery 45 is installed in the battery mounting portion 46, as described above, the operating member 90 pivots. Thus, as... Figure 19 As shown, the pressing part 93 overcomes the force applied by the compression spring 98 and presses the pressed part 97. As a result, the engaging member 94... Figure 18 The engagement position shown has been shifted to... Figure 19 The non-engaged position is shown. This releases the engagement between the motor shaft 34 and the engaging part 96, allowing the motor shaft 34 to rotate. Therefore, with the battery 45 installed, the engaging part 94 does not affect the rotation of the motor shaft 34. When the battery 45 is removed, the pressing part 93 (operating part 90) and the engaging part 94 return to their original positions due to the force applied by the compression spring 98. Figure 18 The location shown.

[0077] Based on the above structure, the rotation of the motor shaft 34 can be prevented simply by removing the battery 45. Therefore, when using a socket wrench or similar tool to loosen or tighten the flange 36 to replace the saw blade 35, the rotation of the motor shaft 34 can be prevented. This allows for easy replacement of the saw blade 35, improving user convenience.

[0078] Furthermore, the circular saw 10 has a structure that allows the saw blade 35 to tilt at a larger angle than existing entry-type circular saws. The following mainly refers to... Figures 21-24 To illustrate this structure. For example... Figure 1and Figure 2 As shown, the cover 50 has an auxiliary cover 500 that functions as part of the right side portion of the cover 50. The auxiliary cover 500 is configured to function as part of the portion of the cover 50 near the base 20 (in other words, as part of the lower edge of the right side portion of the cover 50). Details will be described later, but the auxiliary cover 500 is configured to be movable relative to the cover body 52.

[0079] As described above, the main body 30 and the cover body 52 can tilt relative to the base 20 by loosening the wing screws 28 and 29 provided on the corner contact plates 24 and 25. This tilting action is about the first tilting axis AX6 (refer to...). Figure 22 It is centered around ) . For example Figure 22 As shown, the first tilting axis AX6 is located below the base 20. Multiple arc-shaped protrusions and concave portions are formed on the rear surface of the corner contact plate 24 and the front surface of the front arc portion of the corner contact member 26. These protrusions and concave portions engage with each other to guide the tilting motion. The center of the arc-shaped protrusions and concave portions coincides with the first tilting axis AX6. The same applies to the front surface of the corner contact plate 25 and the rear surface of the rear arc portion of the corner contact member 26.

[0080] like Figure 23 As shown, the auxiliary cover 500 has a cover member 510 for covering the sides of the saw blade 35 and a support member 520 for supporting the cover member 510. The cover member 510 has a first part 511, a second part 512, a third part 513, and abutment portions 514 and 515. The first part 511 has a generally rectangular shape, as shown... Figure 1 Cover the side of saw blade 35 as shown. (As shown) Figure 8 As shown, the width of the first part 511 in the front-back direction is set such that the first part 511 extends to the outside of the saw blade 35 in the front-back direction.

[0081] Parts 2 and 3 extend toward the inside of the cover 50 (the side where the saw blade 35 is located) from the two edges of part 1 along its length (front-back direction). The abutting parts 514 and 515 extend from the left ends of parts 2 and 3 in a direction away from part 1, parallel to part 1.

[0082] like Figure 24 As shown, the cover member 510 is reinforced by a plurality of ribs 516 extending along its length. To avoid interference between the main body 30 and the cover 50 and the flange 36 when tilting, no ribs 516 are formed in the central portion of the cover member 510 in the length direction.

[0083] like Figure 25As shown, the support member 520 is composed of a first support portion 520a, a second support portion 520b, and a bridging portion 520c. The first support portion 520a and the second support portion 520b are simple, elongated plate shapes. The bridging portion 520c is a plate shape with its length along the rear-to-rear direction and has a hinge portion at its right end. The bridging portion 520c is integrally welded to the first support portion 520a and the second support portion 520b on the left side of the front and rear portions, respectively. The first support portion 520a and the second support portion 520b are respectively positioned near the front and rear ends of the cover member 510 via the bridging portion 520c. Hinges 530a and 530b are formed by a portion of the bridging portion 520c and a portion of the cover member 510. The hinges 530a and 530b are located at the two edges in the length direction and the lower edge in the width direction of the cover member 510. With this structure, the support member 520... Figures 23-25 As shown, the cover member 510 can be tilted around the second tilt axis AX7. The first support portion 520a and the second support portion 520b, which are separated in the front-rear direction, support the cover member 510 via the bridging portion 520c, thereby enabling the cover member 510 to tilt more stably.

[0084] The first support portion 520a and the second support portion 520b are arranged such that their positions in the vertical direction are fixed. In this embodiment, the first support portion 520a and the second support portion 520b are arranged on the base 20 in a manner that allows them to move in the left-right direction. By arranging the first support portion 520a and the second support portion 520b on the base 20, the second tilting axis AX7 of the cover member 510 is located above the lower surface 21 of the base 20.

[0085] More specifically, such as Figure 27 As shown, the base 20 has two through holes 220a and 220b extending in the left-right direction, respectively disposed at two positions corresponding to the first support portion 520a and the second support portion 520b. The first support portion 520a and the second support portion 520b are slidably disposed on the base 20 with their through holes 220a and 220b respectively through them. With this structure, the first support portion 520a and the second support portion 520b can be reliably held on the base 20. Furthermore, two guide grooves 210a and 210b extending in the left-right direction are formed on the base 20. The first support portion 520a and the second support portion 520b are respectively received within the guide grooves 210a and 210b. With this structure, the first support portion 520a and the second support portion 520b can be prevented from forming an angle with respect to the left-right direction. Therefore, the sliding property in the left-right direction is stable.

[0086] The auxiliary cover 500 is configured to coordinate with a tilting motion centered on the first tilting axis AX6 of the cover body 52, with the auxiliary cover 500 tilting around the swing axis AX2. This coordinated motion will be explained below. Figure 1 As shown, the auxiliary cover 500 is arranged such that the upper edge of the cover member 510 is located inside the cover body 52 (so that the upper edge of the cover member 510 is located above the lower edge of the cover body 52). Additionally, as... Figure 6 As shown, the auxiliary cover 500 is configured to abut against the inner left side surface of the cover body 52 (more specifically, the protrusion 52b protruding towards the right side) with abutting portions 514 and 515. Figure 6 In the diagram, only the contact portion 514 is confirmed to be in contact with the left inner surface of the cover body 52. ​​Furthermore, although not shown in the diagram, the contact portions 514 and 515 are also arranged to contact the right inner surface of the cover body 52 (more specifically, the protrusion protruding towards the left). That is, the contact portions 514 and 515 are held between the protrusion 52b of the left inner surface of the cover body 52 and the protrusion of the right inner surface of the cover body 52.

[0087] like Figure 21 As shown, with the main body 30 and the cover body 52 not tilted relative to the base 20 and the main body 30 located at the lower dead center, when viewed from the direction extending from the rotation axis AX1 of the saw blade 35 (left-right direction), the auxiliary cover 500 (more specifically, the first part 511 of the cover component 510) overlaps with the rotation axis AX1. At this time, as... Figure 2 As shown, the cover member 510 extends downward to a position where there is approximately no gap between the cut piece and the cover member 510 when the base 20 is placed on the cut piece, thereby fully covering the sides of the saw blade 35.

[0088] When the main body 30 and the cover body 52 are relative to the base 20 about the first tilting axis AX6, Figure 21 The state shown is tilted to Figure 22At the maximum tilt angle (60 degrees) shown, the left side of the cover body 52 presses the abutting portions 514 and 515 of the cover member 510 towards the tilting direction of the cover body 52. ​​As a result, the cover member 510 tilts about the second tilting axis AX7. At this time, to compensate for the mismatch between the first tilting axis AX6 and the second tilting axis AX7, the first support portion 520a and the second support portion 520b slide to the right (in other words, in a direction orthogonal to the second tilting axis AX7 and parallel to the base 20 and towards the outer side of the base 20). That is, the cover member 510 tilts while moving the second tilting axis AX7 to the right. Based on this action, the cover body 52 and the cover member 510 move relative to each other in the vertical direction (the direction in which the cover body 52 and the cover member 510 extend parallel to each other) with the cover member 510 facing upwards relative to the cover body 52. Here, when the vertical distance between the first tilt axis AX6 and the second tilt axis AX7 is set as R, the relative movement of the cover component 510 is set as P, and the tilt angle is set as θ, the formula P = (R / cosθ) - R holds true (here, for convenience, the horizontal offset between the first tilt axis AX6 and the second tilt axis AX7 is ignored) (refer to...) Figure 28 With the two tilting axes AX6 and AX7 extending vertically by a distance R, a displacement P, represented by (R / cosθ) - R, will inevitably occur. The series of movements of the auxiliary cover 500 utilizes this displacement, represented by a trigonometric function.

[0089] At this time, since the second tilting axis AX7 is located above the lower surface 21 of the base 20, the cover member 510 does not interfere with the workpiece being cut, which is located directly below the base 20, regardless of the degree of tilt. Therefore, compared with existing infeed cutting machines, the maximum tilt angle can be increased. This maximum tilt angle depends on the tilting mechanism of the main body 30 and the cover body 52.

[0090] In addition, such as Figure 22 As shown, with the main body 30 and the cover 50 tilted to their maximum tilt angle, when viewed from the direction extending from the rotation axis AX1 of the saw blade 35 (left-right direction), the auxiliary cover 500 (more specifically, the first part 511 of the cover member 510) does not overlap with the rotation axis AX1. Therefore, the flange 36 holding the saw blade 35 can be brought as close as possible to the lower surface 21 of the base 20. Thus, a large cutting depth of the saw blade 35 into the workpiece can be ensured.

[0091] When the main body 30 and the cover 50 are from Figure 22 The tilt state shown has returned to Figure 21In the non-tilted state shown, the inner right surface of the cover body 52 presses against the abutment portions 514 and 515 of the cover component 510. Therefore, while the first support portion 520a and the second support portion 520b slide to the left, the cover component 510 tilts in the opposite direction around the second tilting axis AX7, and the entire auxiliary cover 500 returns to its original position. Figure 21 The location shown.

[0092] According to the above structure, the abutting portions 514 and 515 are always in contact with the left and right inner surfaces of the cover body 52, respectively, thus enabling the tilting of the cover body 52 centered on the first tilting axis AX6 and the tilting of the cover component 510 centered on the second tilting axis AX7 to be smoothly linked. Furthermore, since a larger contact area can be obtained through the abutting portions 514 and 515, the linkage operation can be made smoother. However, the abutting portions 514 and 515 can be omitted. In this case, during the linkage operation when transitioning from a non-tilted state to a tilted state, the second portion 512 and the third portion 513 can abut with the left inner surface of the cover body 52, and during the linkage operation when transitioning from a tilted state to a non-tilted state, the upper edge of the first portion 511 can abut with the right inner surface of the cover body 52. Furthermore, in the non-tilted state of the main body 30 and the cover 50, the abutting portions 514 and 515 (or the second portion 512 and the third portion 513) may not abut against the left inner surface (protrusion 52b) of the cover body 52. ​​In this structure, the cover member 510 and the cover body 52 can also abut against each other in the early stage of the tilting motion via the second portion 512 and the third portion 513, thereby achieving a certain degree of effectiveness. Similarly, the abutting portions 514 and 515 and the protrusion on the right inner surface of the cover body 52 may not abut against each other in the non-tilted state.

[0093] In addition to the functions described above, parts 512 and 513 also serve to fill the gap between the cover 50 and the base 20. Specifically, the cover body 52 has two inclined portions 52a on its right side (see reference). Figure 1 The inclined portion 52a is inclined such that it is closer to the left side of the cover body 52 as it gets closer to the base 20. Two inclined portions 52a are disposed on both sides of the cover member 510 in the length direction. The inclined portions 52a are formed to allow the cover 50 to tilt to... Figure 22 The position shown avoids interference between the cover body 52 and the cut part. Because the second part 512 and the third part 513 are arranged adjacent to the two inclined portions 52a, it is possible to fill the gap between the cover 50 and the base 20 that might be caused by the inclined portions 52a. Figure 1 Only the state of the gap filled by part 2, 512, can be observed.

[0094] Furthermore, according to the above structure, since the first support portion 520a and the second support portion 520b slide during the tilting action, the mismatch between the first tilting axis AX6 and the second tilting axis AX7 is compensated. Therefore, smoother linkage between the cover body 52 and the cover component 510 can be obtained.

[0095] The following is for reference Figures 29-32 The circular saw 110 according to the second embodiment will be described below. The circular saw 110 according to the second embodiment differs from the circular saw 10 according to the first embodiment in that it has a locking operation mechanism 180 instead of a locking operation mechanism 80; and a gearbox 160 instead of a gearbox 60. Otherwise, it has the same structure as the circular saw 10. Hereinafter, only the differences between the circular saw 110 and the first embodiment will be described.

[0096] like Figure 29 As shown, a first abutting portion 161, a clearance portion 162, a recess 163, and a second abutting portion 164 are formed on the right surface of the gearbox 160. The clearance portion 162 and the recess 163 are recessed to the left. The clearance portion 162 and the recess 163 are continuous and have an overall L-shaped form (more precisely, an L-shape formed by arcs). The first abutting portion 161 is an arc-shaped portion adjacent to the recess 163, forming a sidewall of the recess 163. The second abutting portion 164 is an arc-shaped portion adjacent to the clearance portion 162, forming a sidewall of the clearance portion 162.

[0097] Although the shapes of the first abutted portion 161, the avoidance portion 162, the recess 163 and the second abutted portion 164 are different from those of the first abutted portion 61, the avoidance portion 62, the recess 63 and the second abutted portion 64 in the first embodiment, they have the same function.

[0098] like Figure 30 As shown, the locking mechanism 180 has an operating lever 181 and a locking lever 183. One end of the operating lever 181 is pivotally supported by the cover body 52 about a first pivot axis AX4. The other end of the operating lever 181 is a free end extending rearward. A cam 182 is formed around the base end (the aforementioned end) of the operating lever 181. One end of the locking lever 183 is pivotally supported by the cover body 52 about a second pivot axis AX5. An abutment portion 184 protruding to the left (gearbox 160 side) is formed at the other end of the locking lever 183.

[0099] like Figure 30As shown, when the main body 30 is at its upper stop and the locking operation mechanism 80 is in the blocking position, the abutment portion 184 is positioned facing the base end of the clearance portion 162 (the connection portion connected to the recess 163). In this state, the locking operation mechanism 180 (in other words, the abutment portion 184) is allowed to move from the blocking position to the allowed position. Specifically, when the user moves the operating lever 181 from... Figure 30 The indicated blocking position is shifted to Figure 31 When shown in the allowed positions, such as Figure 31 As shown, the locking lever 183 is pressed by the cam 182. As a result, the locking lever 183 pivots in the opposite direction to the pivoting direction of the operating lever 181. At this time, the abutment portion 184... Figure 31 As shown, it moves from a position facing the base end of the clearance portion 162 to a position facing the top end of the clearance portion 162 (the end opposite to the connecting portion connected to the recess 163). Furthermore, when the user returns the operating lever 181 from the permitted position to the blocked position, the pressing force of the cam 182 is released, and the locking lever 183 returns to its original position by its own weight.

[0100] Figure 31 In the state shown, when the main body 30 is at the top dead center and the locking operation mechanism 180 is in the allowed position, even if the user wants to move the main body 30 to the bottom dead center, the second abutting part 164 will abut against the abutting part 184 in the direction that prevents the movement. Therefore, the user cannot move the main body 30 to the bottom dead center.

[0101] on the other hand, Figure 30 In the state shown, that is, when the main body 30 is at the upper dead center and the locking operation mechanism 180 is in the blocking position, if the user moves the main body 30 to the lower dead center, the abutment part 184 will... Figure 32 As shown, it moves within the recess 163 to a position facing the top of the recess 163 (the end opposite to the connection portion connected to the relief portion 162). Therefore, the main body 30 is allowed to move from the top dead center to the bottom dead center.

[0102] Figure 32 In the state shown, when the main body 30 is in a position other than the top dead center and the locking operation mechanism 80 is in the blocking position, even if the user wants to move the locking operation mechanism 180 from the blocking position to the allowing position, the abutment part 184 will abut against the first abutted part 161 in the direction that prevents the movement. Therefore, the user cannot move the locking operation mechanism 180 to the allowing position.

[0103] In this way, the locking operating mechanism 180 and gearbox 160 can achieve the same functions as the locking operating mechanism 80 and gearbox 60 in the first embodiment. In addition, by making the locking operating mechanism 180 a structure with two pivot axes, the design freedom of the locking operating mechanism can be increased and the operability can be improved.

[0104] The embodiments of the present invention have been described above. However, these embodiments are provided for ease of understanding and are not intended to limit the present invention. The present invention can be modified and improved without departing from its spirit, and the present invention includes its equivalents. Furthermore, the technical solutions and elements described in the specification can be arbitrarily combined or omitted within the scope of solving at least a portion of the above-mentioned technical problems or achieving at least a portion of the effects.

[0105] For example, the locking operating mechanisms 80 and 180 can be supported by gearboxes 60 and 160 instead of the cover body 52. ​​In this case, the cover body 52 may also have a structure equivalent to the first abutted portions 61 and 161, the avoidance portions 62 and 162, the recesses 63 and 163, and the second abutted portions 64 and 164.

[0106] Alternatively, a structure in which the main body 30 moves horizontally in the vertical direction can be used instead of a structure in which the main body 30 swings around the swing axis AX2. In this case, the shapes of the first abutted portions 61, 161, the avoidance portions 62, 162, the recesses 63, 163, and the second abutted portions 64, 164 can be appropriately set according to the displacement direction of the main body 30.

[0107] Alternatively, a structure in which the engaging member 94 engages with the output shaft 42 when the battery 45 is removed from the battery mounting section 46, thereby preventing rotation of the output shaft 42, can be used instead of the aforementioned structure in which the engaging member 94 engages with the motor shaft 34 when the battery 45 is removed from the battery mounting section 46, thereby preventing rotation of the motor shaft 34. In this case, any mechanical mechanism that transmits the displacement of the operating member 90 to the engaging member 94 can be used.

[0108] Alternatively, the structures described above that are independent of battery 45 can also be applied to circular saws powered by commercial power sources for the electric motor 33.

[0109] Alternatively, the various linkage actions between multiple components can also be achieved by any mechanical structure capable of performing the same function, and are not limited to the structures described above.

[0110] Furthermore, the various embodiments described above can be applied to any type of portable cutting tool (e.g., slotting cutter, etc.), and are not limited to circular saws.

[0111] The correspondence between the constituent elements of the above-described embodiments and the constituent elements of the present invention is shown below. However, each constituent element of the embodiments is merely an example and is not limited to the constituent elements of the present invention. The circular saw 10 is an example of a "portable processing machine". The saw blade 35 is an example of a "cutting tool". The cover 50 is an example of a "cover". The cover body 52 is an example of a "cover body". The door 53 is an example of a "door". The opening and closing mechanism 70 is an example of an "opening and closing mechanism". The locking operation mechanism 80 is an example of a "locking operation mechanism". An example where the upper stop point is a "first position". An example where the lower stop point is a "second position". The abutting portions 85 and 184 are examples of "abutting portions". The first abutted portions 61 and 161 are examples of "first abutted portions". The clearance portions 62 and 162 are examples of "clearance portions". The recesses 63 and 163 are examples of "recesses". The second abutting parts 64 and 164 are examples of "second abutting parts". The hinge mechanism 54 is an example of "hinge mechanism". The rotation axis AX1 is an example of "rotation axis". The swing axis AX2 is an example of "swing axis". The first pivot axis AX4 is an example of "first pivot axis". The second pivot axis AX5 is an example of "second pivot axis". The engaging part 71 is an example of "engaging part". The compression spring 75 is an example of "force-applying part". The locking part 76 is an example of "locking part". The battery 45 is an example of "battery". The battery mounting part 46 is an example of "battery mounting part". The operating part 81 and the operating lever 181 are examples of "operating lever". The locking lever 183 is an example of "locking lever". The engaging part 94 is an example of "engaging part". The operating part 90 is an example of "operating part".

Claims

1. A portable processing machine, characterized in that, It has a main body, a cover, an opening and closing mechanism, and a locking mechanism, among which, The main body has a motor configured to provide rotational driving force to the cutting tool; The cover is used to at least partially cover the knife, and has a cover body and a door that can be opened and closed; The opening and closing mechanism is supported by the cover body and is configured to open and close the door. The locking mechanism is supported by one of the cover body and the main body portion in a displaceable manner, and is configured to lock the opening and closing mechanism in the closed state. The main body is configured to be displaceable relative to the cover between a first position where the cutter is entirely housed within the cover and a second position where the cutter is partially exposed outside the cover. The locking mechanism is configured to be manually operable between a blocking position where the opening and closing mechanism prevents the door from opening and a permissive position where the opening and closing mechanism allows the door to open. The portable processing mechanism becomes, When the main body is in the first position, the locking mechanism is allowed to move from the blocking position to the allowed position. When the main body is located in a position other than the first position, the locking mechanism is prevented from moving from the blocking position to the allowed position by the contact between the cover body and the other of the main body with the locking mechanism.

2. The portable processing machine according to claim 1, characterized in that, The locking mechanism has an abutment portion that protrudes toward the other of the cover body and the main body portion, and is configured to be displaceable between the blocking position and the allowing position. The other of the cover body and the main body portion has a first abutted portion and a strip-shaped avoidance portion, wherein, When the main body is located in a position other than the first position, the first abutted part abuts against the abutting part in a direction that prevents the abutting part from displacing from the blocking position to the allowed position; The abutment portion is arranged adjacent to the first abutted portion and is located inside the first abutted portion in the protruding direction of the abutment portion. When the main body is in the first position, the abutting part is in a position facing the avoidance part, and does not abut against the first abutted part in a direction that prevents the abutting part from moving from the blocking position to the allowed position.

3. The portable processing machine according to claim 1 or 2, characterized in that, The locking mechanism is supported by the cover body.

4. The portable processing machine according to claim 1 or 2, characterized in that, The cover has a hinge mechanism for opening and closing the door. When the side being machined by the tool is defined as the front side and the opposite direction as the rear side, the hinge mechanism is positioned on the front or rear side of the tool's axis of rotation. The hinge mechanism is oriented in such a way that the rotational movement of the door by the hinge mechanism includes the horizontal component when the portable processing machine is used.

5. The portable processing machine according to claim 4, characterized in that, The door rotation movement performed by the hinge mechanism includes a vertical component as the portable processing machine is used, and the door opening movement is oriented in a manner that includes a component in the vertical direction upwards.

6. The portable processing machine according to claim 4, characterized in that, The hinge mechanism is positioned in front of the rotation axis of the tool. The opening and closing mechanism and the locking operation mechanism are located on the rear side of the rotation axis of the cutting tool.

7. The portable processing machine according to claim 2, characterized in that, The main body is configured to swing about a swing axis between the first position and the second position relative to the cover. The abutting portion and the first abutted portion are positioned closer to the swing axis relative to the rotation axis of the cutting tool.

8. The portable processing machine according to claim 7, characterized in that, The first abutted portion is formed in an arc shape. The other of the cover body and the main body portion has a recess that is recessed further than the first abutted portion and is formed along the first abutted portion in a manner adjacent to it. When the abutting part is in the blocking position and the main body part is displaced between the first position and the second position, the abutting part faces the recess while the main body part moves relative to the abutting part.

9. The portable processing machine according to claim 2, characterized in that, The other of the cover body and the main body portion has a second abutting portion, which is formed in a strip shape along the avoidance portion, and when the abutting portion is in the allowed position, it abuts against the abutting portion in a direction that prevents the main body portion from displacing from the first position to the second position.

10. The portable processing machine according to claim 1 or 2, characterized in that, The opening and closing mechanism has an engaging portion configured to be displaceable between a closed position and an open position. The closed position is where the engaging portion engages with the door, holding the door in a closed state; the open position is where the engaging portion is not engaged with the door, allowing the door to be opened. The engaging portion can be connected to the locking mechanism in an operable manner, such that when the locking mechanism is in the blocking position, the engaging portion is in the closed position, and when the locking mechanism is in the allowing position, the engaging portion is in the open position.

11. The portable processing machine according to claim 10, characterized in that, The opening and closing mechanism has a force-applying component and a locking component, wherein... The locking member is subjected to a force by the force-applying member in the opening direction of the door, and is configured to be displaceable in the opening and closing direction of the door. The locking component is configured such that, When the door is closed, it is pressed against the force applied by the force-applying component and positioned so as not to interfere with the displacement of the engaging part from the closed position to the open position. When the door is opened, it is pressed down by the force applied by the force-applying component and located at a position that interferes with the displacement of the engaging part from the open position to the closed position.

12. The portable processing machine according to claim 1 or 2, characterized in that, The main body has a battery mounting section configured to allow for the sliding mounting of a battery that functions as a power source for the motor. The locking mechanism is configured to perform displacement in the following manner, namely, When the locking mechanism is in the permitted position, it is located at a position that interferes with the sliding trajectory of the battery when it is installed in the battery mounting part. When the locking mechanism is in the blocking position, it is in a position that does not interfere with the sliding trajectory.

13. The portable processing machine according to claim 1 or 2, characterized in that, The locking mechanism has a pivotable operating lever.

14. The portable processing machine according to claim 1 or 2, characterized in that, The main body has a battery mounting section configured to allow for the sliding mounting of a battery that functions as a power source for the motor. The portable processing mechanism is capable of performing an operation to displace the locking mechanism from the blocking position to the allowing position only when the main body is in the first position and the battery is not installed in the battery mounting part.

15. A portable processing machine, characterized in that, It has a main body, a cover, an opening and closing mechanism, and a locking mechanism, among which, The main body has a motor configured to provide rotational driving force to the cutting tool; The cover is used to at least partially cover the knife, and has a cover body and a door that can be opened and closed; The opening and closing mechanism is supported by the cover body and is configured to open and close the door. The locking mechanism is supported by one of the cover body and the main body portion in a displaceable manner, and is configured to lock the opening and closing mechanism in the closed state. The main body is configured to be displaceable relative to the cover between a first position where the cutter is completely housed within the cover and a second position where the cutter is partially exposed outside the cover. The locking mechanism is configured to be manually operable between a blocking position where the opening and closing mechanism prevents the door from opening and a permissive position where the opening and closing mechanism allows the door to open. The portable processing mechanism becomes, When the main body is in the first position, the locking mechanism is allowed to move from the blocking position to the allowed position. When the main body is located in a position other than the first position, the locking mechanism is prevented from moving from the blocking position to the allowed position by the contact between the cover body and the other part of the main body with the locking mechanism. When the locking mechanism is in the blocking position, the main body is allowed to move from the first position to the second position. When the locking mechanism is in the permitted position, the main body is prevented from moving from the first position to the second position by the contact between the cover body and the other of the main body parts with the locking mechanism.

16. The portable processing machine according to claim 15, characterized in that, The locking mechanism has a pivotable operating lever.

17. The portable processing machine according to claim 16, characterized in that, The locking mechanism includes an operating lever and a locking lever, wherein... The operating lever is capable of pivoting about the first pivot axis; The locking lever is pressed at least temporarily by the operating lever as the operating lever pivots, and can pivot around a second pivot axis different from the first pivot axis. When the main body is in a position other than the first position, the locking lever abuts against the cover body and the other of the main body to prevent the locking operating mechanism from displacing from the blocking position to the allowing position.

18. The portable processing machine according to any one of claims 15 to 17, characterized in that, The main body has a battery mounting section configured to allow for the sliding mounting of a battery that functions as a power source for the motor. The portable processing mechanism is capable of performing an operation to displace the locking mechanism from the blocking position to the allowing position only when the main body is in the first position and the battery is not installed in the battery mounting part.

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