CN216263830U - Saw with cutting blade - Google Patents

Abstract

The utility model relates to a saw comprising: a base (10), a support arm (20), and a drive assembly (30), a handle assembly (40), and a blade assembly (50) supported by the support arm (20), wherein the handle assembly (40) comprises an attachment portion (60) and a grip portion (70), a gap (75) being formed between the attachment portion (60) and the grip portion (70), the saw further comprising a lock button (B1) and a switch button (B2), wherein one of the locking button (B1) and switch button (B2) is provided on the bottom side of the grip portion (70) facing the base (10), the other is provided on the inner side of the grip portion (70) facing the gap (75), and wherein the locking button (B1) and switch button (B2) are arranged in association such that the switch button (B2) can only be triggered to activate the motor of the drive assembly (30) when the locking button (B1) is displaced to an actuated position.

Description

Saw with cutting blade

Technical Field

The utility model relates to a saw, in particular to a handheld electric saw.

Background

A conventional saw, such as a cross-cut saw or circular saw, generally includes a base for placing a workpiece to be cut, a support arm pivotally supported on the base, a drive assembly, a handle assembly, and a blade assembly mounted on the support arm. When the motor of the driving assembly is started or electrified, the saw blade of the saw blade assembly is driven to rotate, and at the moment, the operator presses the supporting arm downwards, so that the saw blade can cut the workpiece fixed on the base according to the requirement.

The handle assembly is secured to the support arm and is pivoted, e.g., depressed or raised, with the support arm by the operator. Typically, the handle assembly includes a portion that is held by an operator's hand during operation of the saw, the hand-held portion being disposed substantially parallel to the blade assembly, and in particular parallel to the blade, and being spaced a small distance from a blade guard of the blade assembly in a transverse direction perpendicular to the blade. The lock button and the switch button of the saw are arranged on a lateral side of the hand grip portion facing away from the blade assembly and an inner side adjacent to the lateral side, or vice versa, respectively, such that a right-handed operator can actuate the lock button and the switch button, respectively, with a thumb and an index finger, when holding the hand grip portion with the right hand.

However, this arrangement, in which one button is disposed on a lateral side and the other button is disposed on an adjacent inner side, is inconvenient or uncomfortable for a left-handed operator to hold the hand-held portion with the left hand to operate the saw, so that the existing arrangement is only friendly to right-handed operators and not to the other left-handed operators. Moreover, the hand gripping portion is disposed substantially vertically at a small interval from the blade assembly, and even for a right-handed operator, the wrist portion of his right hand interferes with the hand gripping portion, which is uncomfortable.

It is desirable to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to improve the structure of the saw, so that the saw is friendly to operators with both right-handed and left-handed habits, and the operation comfort of the operators is improved.

This object is achieved by a saw structure according to the utility model. The saw of this application includes: a base; a support arm attached to the base; a drive assembly supported by the support arm and including a motor that outputs rotational motion; and a handle assembly and a blade assembly supported by the support arm, the blade assembly including a blade driven by the motor to rotate about a rotational axis extending in a transverse direction, wherein the handle assembly comprises an attachment portion attached to the drive assembly and a grip portion extending in a lateral direction for gripping by an operator, a gap is formed between the attachment portion and the grip portion, and wherein the saw further comprises a lock button and a switch button, wherein one of the locking button and the switch button is provided on a bottom side of the grip portion facing the base, and the other is provided on an inner side of the grip portion facing the gap, and wherein the locking button and switch button are arranged in association such that the switch button can only be triggered to activate the motor of the drive assembly when the locking button is displaced to the actuated position.

In one embodiment, the gripping portion and the attachment portion are connected to each other by two connecting portions spaced apart, the gripping portion, the attachment portion and the two connecting portions defining the void.

In one embodiment, the handle assembly has a planar configuration in which the attachment portion and the gripping portion lie in the same plane when viewed in the transverse direction.

In one embodiment, the planar structure has a width direction along a transverse direction and a length direction within the plane perpendicular to the width direction, the handle assembly including at least one of the following features:

the included angle between the plane and the horizontal plane is in the range of 40-60 degrees;

in the length direction, the grip portion has an outer dimension in a range of 35 to 45 mm;

a distance between the two connection portions in the width direction is in a range of 100 to 150 mm; and

the grip portion has a rounded convex outer contour in a cross section perpendicular to the width direction, the radius of the convex outer contour being in the range of 10 to 15 mm.

In one embodiment, the handle assembly has a "Z" shaped configuration in which the attachment portion and the grip portion are located in two planes parallel to each other, respectively, as viewed in the transverse direction.

In one embodiment, the handle assembly includes a housing comprising an upper half and a lower half attached to one another, wherein the lower half is integrally formed with or separately formed from and attached to a housing of the drive assembly.

In one embodiment, the housing of the handle assembly includes a carrying handle extending from the upper half, the carrying handle extending in a plane perpendicular to the transverse direction.

In one embodiment, the carrying handle is located directly above the drive assembly.

In one embodiment, the saw further comprises a laser button for controlling a laser source of the saw, the laser button being provided on an upper side of the attachment portion, or on a connecting portion connecting the attachment portion and the grip portion, or on an inner side of the grip portion alongside the switch button.

In one embodiment, the locking button and the switch button are in the form of a sliding button or knob or toggle button or push button, or

The locking button is a one-way or two-way sliding button having one or two actuated positions that allow the switch button to be triggered to activate the motor of the drive assembly and a non-actuated position that inhibits the switch button from being triggered.

The saw of the present application includes an operating portion disposed substantially horizontally in a transverse direction generally perpendicular to the blade assembly, with the locking button and the switch button disposed on the bottom side and inside of the operating portion, respectively, so that either a right handed operator or a left handed operator can actuate the locking button and the switch button with the thumb and forefinger, respectively, achieving a goal of being friendly to all operators. In addition, the saw structure of the application is also provided with a carrying handle which is convenient to operate when the saw is carried, the carrying handle is arranged above the approximate gravity center (such as a driving assembly) of the saw and is approximately parallel to the saw blade assembly, and the operation is convenient.

Drawings

The above and other features and advantages of the present invention will be best understood from the following description of an embodiment thereof, given with reference to the accompanying drawings. It will be appreciated by those skilled in the art that the drawings are merely schematic and illustrative of the principles of the utility model and are not drawn to scale. In the drawings:

FIG. 1 is a front view of a circular saw constructed in accordance with the principles of the present application;

FIG. 2 is a top view of the circular saw of FIG. 1;

FIG. 3 is a perspective view of the circular saw from another perspective;

FIGS. 4 and 5 are enlarged top and bottom views, respectively, of a gripping portion of a handle assembly of the circular saw.

Like parts are designated by like reference numerals throughout the various drawings.

Detailed Description

The principles of the present invention will now be described by way of example with reference to the accompanying drawings. It will be understood by those skilled in the art that the principles of the present invention are not only applicable to the illustrated saw construction, but are also applicable to any saw construction having similar constructions or requirements.

In the drawings, FIG. 1 is a front view of a circular saw 100 constructed in accordance with the principles of the present application; FIG. 2 is a top view of the circular saw 100 of FIG. 1; FIG. 3 is a perspective view of the circular saw 100 from another perspective; FIGS. 4 and 5 are top and bottom views, respectively, of the gripping portion of the handle assembly of the circular saw 100 of FIG. 1.

As shown, the circular saw 100 generally includes a base 10 for placing a work piece to be cut (not shown) and a support arm 20 pivotally attached to the base 10. In the illustrated embodiment, the support arm 20 is pivotable relative to the base 10 about a pivot axis 22 extending along the transverse direction a (fig. 2).

The support arm 20 supports and mounts thereon a drive assembly 30, a handle assembly 40 and a blade assembly 50 so that these assemblies can pivot with the support arm 20 about the pivot axis described above relative to the base 10. The drive assembly 30 includes a housing 32 and a motor assembly (not shown) housed within the housing 32, with a motor output shaft (not shown) extending in the transverse direction a extending from the drive assembly 30 toward the blade assembly 50. The blade assembly 50 includes a blade 52 attached to the motor output shaft and a blade guard 54 that covers the blade 52 to protect the operator and other nearby people or items from the blade 52. Alternatively, in one embodiment, the blade guard 54 may include a stationary fixed guard portion and a movably mounted movable guard portion that is rotatable relative to the fixed guard portion to vary the size or covered area of the covered portion of the blade 52 as desired. Preferably, the saw blade 52 is completely covered by the blade guard 54 when the movable guard portion is rotated to a certain position relative to the stationary guard portion.

The handle assembly 40 is fixedly attached to the drive assembly 30. The handle assembly 40 includes a housing 42 defining an interior space that houses some of the functional components of the circular saw, including, but not limited to, the structure or contacts corresponding to each switch or button, a portion of the electrical cord W for electrical connection to an external power source, various electrical terminals, etc. These internal features are not central to the present application and are not described in detail herein.

Referring to the drawings, herein, a longitudinal direction L in which the support arm 20 is located forward of the pivot 22 is defined as being perpendicular to both the lateral direction a and the vertical direction T described above. Therefore, the support arm 20 extends obliquely forward in the longitudinal direction L and upward in the up-down direction T with respect to the attachment portion on the base 10 where the pivot 22 is located. The drive assembly 30, handle assembly 40 and blade assembly 50 supported by the support arm 20 are all located forward of the pivot 22, so that an operator also stands forward of the circular saw 100 when the circular saw 100 is in operation. Directional terminology used herein is understood with reference to the drawings.

As shown, the housing 42 may include an upper half 42a and a lower half 42b that are attached together to form the interior space. In one embodiment, the lower half 42b of the housing 42 may be integrally formed with the housing 32 of the drive assembly 30, with the upper half 42a attached to the lower half 42 b. Alternatively, in other embodiments, the lower half 42b of the housing 42 is formed separately from and attached to the housing 32 of the drive assembly 30.

The housing 42, which is formed by the upper half 42a and the lower half 42b, is generally a generally planar structure that is generally parallel to the transverse direction a, parallel to the pivot axis of the saw blade 52 extending along the transverse direction a. Preferably, for the purpose of convenient manipulation by an operator, the generally planar configuration of the handle assembly 40 forms an angle α (fig. 1) with a horizontal plane (e.g., a horizontal surface of the base 10 on which a workpiece rests in the illustration) in the range of 40 to 60 degrees. The generally planar structure of the handle assembly 40 extends in a width direction along the transverse direction a and a length direction C (fig. 1) perpendicular to the width direction, whereby the angle between the length direction C and the longitudinal direction L is approximately equal to the angle α.

In the length direction C, the handle assembly 40, which is of generally planar configuration, comprised of the upper and lower halves 42a, 42b, provides an attachment portion 60 for attachment to the housing 32 of the drive assembly 30 and a grip portion 70 configured for grasping by an operator, the grip portion 70 and the attachment portion 60 being connected together by a connecting portion 80 on opposite sides in the width direction. Thus, the grip portion 70, the attachment portion 60, and the two connecting portions 80 of the handle assembly 40 define a void 75 (fig. 2) to receive or accommodate four fingers of a hand of an operator holding the grip portion 70.

According to the principles of the present application, the grip portion 70 extends substantially horizontally, preferably substantially parallel to the transverse direction a. As shown, the locking button B1 of the circular saw 100 is disposed on the bottom side of the grip portion 70 facing the base 10, e.g., the locking button B1 is exposed through the lower half 42B of the housing 42 for operator operation, see fig. 3 and 5; a switch button B2 is provided on an inner side of the grip portion 70 facing the gap 75, for example, a switch button B2 is exposed through the upper half 42a and/or the lower half 42B formed for operation by an operator, refer to fig. 2, 4 and 5.

The lock button B1 of circular saw 100 has an actuated position and a non-actuated position, and the lock button B1 and switch button B2 are cooperatively configured such that the switch button B2 can be depressed to or placed in a triggered position only when the lock button B1 is in the actuated position, depressing switch button B2 turns on or turns on the motor of drive assembly 30; and such that switch button B2 cannot be depressed to the firing position or can only be held in the non-firing position when lock button B1 is in the non-actuated position, when the motor of drive assembly 30 is not activated or energized. Thus, the lock button B1 of the circular saw 100 has an actuated position that allows the switch button B2 to be displaced/depressed to the triggered position and a non-actuated position that inhibits the switch button B2 from being displaced to the triggered position, thus remaining in the non-triggered position. Thus, the lock button B1 is used to prevent accidental activation or deactivation of the switch button B2, while the switch button B2 is operatively connected to the motor to control activation and deactivation of the motor.

The lock button B1 and the switch button B2 are provided on the bottom side and adjacent inside of the grip portion 70, respectively, so that it is possible to control the lock button B1 with the thumb and the switch button B2 with the other fingers than the thumb, for example, the index finger, as far as the left-handed operator or the right-handed operator is concerned while holding the grip portion 70 in the hand. Specifically, in operation, the operator holds the grip 70 with either the left or right hand, first places the lock button B1 in the actuated position with the thumb, and then initiates rotation of the saw blade 52 upon actuation or depression of the switch button B2 with, for example, the index finger to initiate operation of the motor.

In order to meet ergonomic requirements and to improve comfort, the cross-section of the grip 70 perpendicular to the transverse direction a or the width direction is dimensioned to be suitable for being held by the palm of an adult human hand. Specifically, for example, the dimension D1 (FIGS. 4 and 5) of the grip portion 70 of the handle assembly 40 in the length direction C may be in the range of 35-45mm, and the distance D2 (FIG. 5) between the two connecting portions 80 in the width direction may be in the range of 100-150mm, and particularly 100-120 mm. Optionally, the grip 70 has a rounded convex outer contour in a cross-section perpendicular to the width direction, the radius R (fig. 4 and 5) of the convex outer contour being in the range of 10 to 15mm

In the illustrated embodiment of the present invention, to better serve all left-handed and right-handed operator operations, the locking button B1 has a saddle-like shape with two convex ends and a concave middle. In the illustrated construction, the lock button B1 is in the form of a slide switch. More preferably, the lock button B1 may be in the form of a two-way sliding switch, i.e., the lock button B1 is provided with a non-actuated position in the middle as a default position and two actuated positions on opposite sides of the non-actuated position. In this manner, a left-handed operator may push the lock button B1 to an actuated position to the right (closer to the blade assembly 50), while a right-handed operator may push the lock button B1 to an actuated position to the left (further from the blade assembly 50). The setting takes care of all operators to the maximum extent, and improves the user experience.

Switch button B2 may be any button structure known in the art having a trigger position (e.g., a depressed position) to activate or turn on the motor and a non-trigger position to deactivate the motor. Again, the outer contours of the lock button B1 and the switch button B2 may be changed as desired by those skilled in the art.

As shown, the circular saw 100 also includes a laser button B3 (fig. 2 and 4) configured to turn on a laser source (not shown) when actuated so that laser light emitted by the laser source can illuminate a sawing zone on the workpiece, e.g., the sawing location and/or sawing depth, etc., can be displayed.

To enable the operator to conveniently operate all of the buttons with one hand, as shown, a laser button B3 may be provided on the upper side of the attachment portion 60 of the handle assembly 40, such as exposed through an opening formed in the upper half 42a of the housing 42 of the handle assembly 40 for operation or actuation by the operator. The laser button B3 is positioned for easy access by a hand holding the grip portion 70.

Similar to the lock button B1 and switch button B2, the laser button B3 may be of any form known to those skilled in the art including, but not limited to, dials, buttons, knobs, and the like.

As described above, the grip portion 70 of the handle assembly 40 extends generally parallel to the transverse direction A, and more closely conforms to the hand grip posture of an operator (whether left-handed or right-handed) standing in front of the circular saw 100; the lock button B1 and the switch button B2 are provided on the bottom side and the inner side of the grip portion 70, respectively, so that the left-handed or right-handed operator can better operate the two buttons with one hand, taking care of all the operator's habits. A laser button B3 is provided on the upper side of the attachment portion 60 of the handle assembly 40 in a location that is accessible to the operator's hand grasping the grip portion 70 so that all three buttons are accessible and operable by the operator's hand grasping the grip portion 70. The structure after so improving more accords with human engineering demand, has improved customer experience degree and travelling comfort.

Further, to the necessity of transferring or carrying the circular saw 100, the circular saw 100 also includes a carrying handle 90. Preferably, the carry handle 90 is positioned above the center of gravity of the circular saw 100, such as the carry handle 90 being positioned directly above the drive assembly 30. Also for ease of handling, the carrying handle 90 extends perpendicularly to the transverse direction a, i.e. is arranged perpendicularly to the handle assembly 40 in a planar configuration.

Modifications and variations may be made in the above-described structural details, as well as in the details of the illustrated construction, by those skilled in the art, without departing from the above-described principles and while performing the same function.

For example, alternatively, the lock button B1 may not be in the form of a sliding switch, such as may take the form of a push button or a rotary or toggle button; for another example, the lock button B1 may be configured to provide only one actuated position.

In some embodiments not shown in the figures, the location where laser button B3 is located may be changed as appropriate. For example, laser button B3 may also be located at a suitable location on grip 70, such as where laser button B3 and switch button B2 are located side-by-side on the inside of grip 70 in a location that is accessible to the operator's index finger, where space and dimensions are appropriate. For another example, the laser button B3 may be located on any of the connections 80 on the handle assembly 40 that can be reached by the operator's hand.

In some embodiments not shown in the figures, the overall structure of the handle assembly 40 may be other than the planar structure shown, provided that the grip portion 70 holding the handle assembly 40 extends generally horizontally and the lock button B1 and switch button B2 disposed thereon provide the advantages described above. For example, the handle assembly 40 may be "Z" shaped when viewed along the transverse direction a or width direction, i.e., the grip portion 70 may be offset downwardly or upwardly from the attachment portion 60 in a direction perpendicular to both the length direction and the width direction of the generally planar structure in the illustration. The location of laser button B3 may or may not be changed to be optimally accessible to the operator's hand holding grip 70.

It should be understood that as used herein, the term "parallel to" includes "parallel to" and "substantially parallel to," the term "perpendicular to" includes "perpendicular to" and "substantially perpendicular to," the "… … direction" includes "along … … direction" and "substantially along … … direction. For example, the expression "the grip portion 70 extends horizontally" encompasses both horizontal extension and slightly obliquely extending at an angle to the horizontal direction in the case of achieving the technical effect of the present application, and the expression "extends in the lateral direction a" includes extending parallel to the lateral direction a and obliquely extending at an angle to the lateral direction a, and such expressions should be similarly understood.

While the principles of the utility model and possible alternative embodiments have been described above with reference to specific embodiments shown in the drawings, it will be appreciated by those skilled in the art that the embodiments described herein are capable of implementation in only some, and not all, embodiments of the utility model. A person skilled in the art may carry out operations of modification, omission, addition and the like to some of the constructional details of the embodiments without departing from the scope of protection defined by the claims, all intended to be covered by the present application.

Claims (10)

1. A saw, comprising: a base (10); a support arm (20) attached to the base (10); a drive assembly (30) supported by the support arm (20) and including a motor that outputs rotational motion; and a handle assembly (40) and a blade assembly (50) supported by the support arm (20), the blade assembly (50) including a blade (52) driven by the motor to rotate about an axis of rotation extending in a transverse direction (A),

the handle assembly (40) comprising an attachment portion (60) attached to the drive assembly (30) and a grip portion (70) extending in a transverse direction (A) for gripping by an operator, the attachment portion (60) and the grip portion (70) forming a gap (75) therebetween,

the saw further comprises a lock button (B1) and a switch button (B2), wherein one of the lock button (B1) and the switch button (B2) is provided on the bottom side of the grip portion (70) facing the base (10) and the other is provided on the inner side of the grip portion (70) facing the gap (75), and wherein the lock button (B1) and the switch button (B2) are arranged in association such a way that the switch button (B2) can be triggered to activate the motor of the drive assembly (30) only when the lock button (B1) is displaced to the actuating position.

2. The saw according to claim 1, wherein the grip portion (70) and the attachment portion (60) are connected to each other by two connection portions (80) spaced apart, the grip portion (70), the attachment portion (60) and the two connection portions (80) defining the void (75).

3. A saw according to claim 2, wherein the handle assembly (40) has a planar configuration in which the attachment portion (60) and the grip portion (70) lie in the same plane, as seen in the transverse direction (a).

4. A saw according to claim 3, wherein the planar structure has a width direction along a transverse direction (a) and a length direction (C) perpendicular to the width direction in the plane, the handle assembly (40) comprising at least one of the following features:

the angle (a) between the plane and the horizontal plane is in the range of 40 to 60 degrees;

in the length direction (C), the grip portion (70) has an outer dimension in the range of 35 to 45 mm;

a distance between the two connection portions (80) in the width direction is in a range of 100 to 150 mm; and

the grip portion (70) has a rounded convex outer contour in a cross section perpendicular to the width direction, the radius (R) of the convex outer contour being in the range of 10 to 15 mm.

5. Saw according to claim 2, wherein the handle assembly (40) has a "Z" -shaped configuration in which the attachment portion (60) and the grip portion (70) are located in two planes parallel to each other, respectively, as seen in the transverse direction (a).

6. The saw according to any one of claims 1 to 5, wherein the handle assembly (40) comprises a housing (42), the housing (42) comprising an upper half (42a) and a lower half (42b) attached to each other, wherein the lower half (42b) is integrally formed with the housing (32) of the drive assembly (30) or is separately formed and attached to the housing (32).

7. Saw according to claim 6, wherein the housing (42) of the handle assembly (40) comprises a carrying handle (90) protruding from the upper half (42a), the carrying handle (90) extending in a plane perpendicular to the transverse direction (A).

8. The saw of claim 7, wherein the carry handle (90) is located directly above the drive assembly (30).

9. Saw according to any one of claims 1-5, further comprising a laser button (B3) for controlling a laser source of the saw, the laser button (B3) being provided on the upper side of the attachment portion (60), or on a connection portion (80) connecting the attachment portion (60) and a grip portion (70), or on the inner side of the grip portion (70) alongside the switch button (B2).

10. Saw according to any one of claims 1-5, wherein the locking button (B1) and the switch button (B2) are in the form of a sliding button or knob or toggle button or push button, or

The locking button (B1) is a one-way or two-way sliding button having one or two actuated positions allowing the switch button (B2) to be triggered to activate the motor of the drive assembly (30) and a non-actuated position prohibiting the switch button (B2) from being triggered.

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