Arc line demarcation device

Abstract

The present invention relates to an arc demarcation device for demarcating a predetermined arc path on a workpiece, comprising: a radius track having a radius track pivot arrangement providing a pivot point about which the radius track is rotatable; and a radius knife rest having a radius brake. The radius brake is operable to secure the radius knife rest on a predetermined position of the radius track. The predetermined position corresponds to a radius of a predetermined arc path. The arc demarcation device also includes a pivot support adapter having a connection device and an adapter pivot device. The connection device is operable to connect the pivot support adapter to a support, and the adapter pivot device is arranged to cooperate with the radius track pivot device to provide the pivot point.

Description

Technical Field

[0001] This invention relates to an arc marking assembly, and more particularly to an arc marking device for marking or cutting arcs or circles on or within a workpiece with a predetermined radius. Background Technology

[0002] Professional technicians, craftspeople, and hobbyists often need to mark, mark, or cut arcs or circles on workpieces. Typically, an arm of known length is used to mark and / or cut arcs and circles. This arm is fixed to the workpiece and provides a pivot point at one end around which the arm can rotate. A marker or cutting tool can then be attached to the end of the arm, allowing the arc or circle to be marked as the arm rotates around the pivot point, or the cutting tool to cut precise arcs.

[0003] Existing devices are available for marking, marking, or cutting arcs or circles on workpieces. For example, prior art patent document US5,515,611A describes a guide for attaching to a trimming machine to form arc-shaped cuts on a workpiece. This trimming machine guide has a circular mounting plate that replaces the lower plate of the trimming machine. The guide has an elongated arm extending from the mounting plate, with a groove extending along the longitudinal centerline of the guide arm. An anchoring mechanism slidably carried in the groove includes anchoring fasteners such as wood screws or nails for anchoring the anchoring mechanism to the workpiece and defining a pivot point for the trimming machine and the guide. The anchoring mechanism also includes a locking mechanism for releasably locking the anchoring mechanism in place along the groove, thereby limiting the radius of movement of the trimming machine and the guide about the pivot point.

[0004] However, the known devices have the disadvantages of being cumbersome to use, limited to use with a single type or manufacturer of cutting tools, lacking universal adaptability, not providing a device for easy connection to cutting tools, and lacking an easy-to-use measuring system.

[0005] Furthermore, a particular drawback of the known devices is that they require the pivot point to be directly anchored to the workpiece, which can be achieved by screwing or nailing the device into the workpiece. This is especially undesirable in many cases, as the workpiece may have a finished surface that needs to be pierced and marked, for example, when the workpiece is a kitchen countertop or other workpiece with a finished surface.

[0006] Therefore, the industry desires a device for marking and / or cutting arcs or circles that is relatively simple and easy to use, suitable for different types of markers and tools, and does not require screwing, nailing, or in any way directly anchoring to the workpiece at a pivot point.

[0007] Therefore, the object of the present invention is to provide an arc marking device that is relatively simple and easy to use, suitable for different types of markers and tools, and does not require screwing, nailing or directly anchoring to the workpiece at a pivot point. Summary of the Invention

[0008] According to a first aspect of the invention, an arc marking device is provided for marking a predetermined arc path on a workpiece. The device includes: a radius track having a radius track pivot device providing a pivot point about which the radius track can rotate; a radius tool holder having a radius brake; wherein the radius track brake is operable to fix the radius tool holder at a predetermined position on the radius track, the predetermined position corresponding to the radius of the predetermined arc path; the arc marking device further includes a pivot support adapter having a connecting device and an adapter pivot device; wherein the connecting device is operable to connect the pivot support adapter to a support member, and the adapter pivot device is configured to cooperate with the radius track pivot device to provide the pivot point.

[0009] The pivot support adapter advantageously includes an adapter member and a connecting member, the adapter member and the connecting member being fixed relative to each other in a substantially perpendicular relationship; wherein the connecting member advantageously includes a connecting means operable to connect the pivot support adapter to the support member, and the adapter member includes the adapter pivot device.

[0010] The connecting device is advantageously operable to detachably connect the pivot support adapter to the support.

[0011] Advantageously, the length of the adapter component can be extended.

[0012] The adapter component advantageously includes a fixing member and an extension member, wherein the fixing member is advantageously fixed relative to the connecting member, and the extension member is advantageously movable to adjust the length of the adapter component.

[0013] The adapter pivot device is advantageously disposed on the extension member.

[0014] Advantageously, the extension member can be fixed in a predetermined position relative to the fixing member.

[0015] The radius track pivot device advantageously includes a pivot hole, and the adapter pivot device advantageously includes a pivot pin, the pivot pin being configured and sized to extend through the pivot hole to provide a pivot point about which the radius track can rotate.

[0016] The radius track advantageously includes one or more track members, and the radius tool holder advantageously includes one or more corresponding track receivers, the track receivers being configured and sized to accommodate the track members or each corresponding track member, and allowing the radius tool holder to move along the length of the radius track in a slidable relationship.

[0017] Advantageously, the track receiver, or each track receiver, is a hole.

[0018] The radius tool holder advantageously includes one or more brake holes corresponding to one or more track receivers, the respective one or more brake holes advantageously extending in a direction substantially perpendicular to the direction of the respective track receiver to intersect with it.

[0019] The radius tool holder advantageously includes a brake actuator associated with each of one or more radius brakes, wherein the brake actuator is advantageously operable to pass the associated radius brake through an associated brake hole and clamp the radius tool holder at a predetermined radius position on the associated radius track, the predetermined radius position corresponding to a predetermined radius of the desired arc to be drawn.

[0020] Advantageously, the radius tool holder includes a tool mount for mounting a tool onto the radius tool holder.

[0021] Advantageously, the arc marking device further includes a ruler connector and a pair of ruler rods; the ruler connector has a ruler connector connection device for connecting the ruler connector to the tool mounting base, and the spacing between the pair of ruler rods is adjustable.

[0022] Advantageously, the tool mount is operable to mount a tool onto the radius tool holder. The tool can be a hand tool or a power tool, such as a power cutting tool, for example, a planer (trimming machine) or a jigsaw.

[0023] Advantageously, the arc marking device further includes a marker connector and a marker holder for holding the marker; the marker connector has a marker connector connection means for connecting the marker connector to the tool mount.

[0024] Advantageously, the arc marking device further includes a jigsaw adapter having a tool mount connection means for connecting the jigsaw adapter to the tool mount and a jigsaw connection means configured to connect the jigsaw adapter to a jigsaw power tool.

[0025] According to a second aspect of the invention, a ruler connector is provided for use with an arc marking device according to a first aspect of the invention. The ruler connector advantageously includes: a ruler connector connecting device for connecting the ruler connector to a tool mounting base; a pair of ruler rods; and a ruler rod adjusting device operable to adjust the spacing between the pair of ruler rods.

[0026] Advantageously, the ruler rod adjusting device includes an adjusting rod comprising a first threaded portion and a second threaded portion, wherein the first threaded portion and the second threaded portion advantageously have opposite thread directions. Alternatively, the ruler rod adjusting device may include a counter-rotating rack and pinion structure operable to adjust the spacing between the pair of ruler rods. The rack and pinion structure may include two racks and a pinion tooth disposed between the two racks.

[0027] Advantageously, the first threaded portion and the second threaded portion are separated by a non-threaded portion.

[0028] Preferably, the ruler rod adjusting device includes a first ruler rod moving ring and a second ruler rod moving ring, wherein the first ruler rod moving ring and the second ruler rod moving ring each include internal threads for engaging with the first threaded portion and the second threaded portion, respectively, and the rotation of the adjusting rod causes the first ruler rod moving ring and the second ruler rod moving ring to move along the first threaded portion and the second threaded portion, respectively, to adjust the spacing between the pair of ruler rods.

[0029] According to a third aspect of the invention, a pivot support adapter is provided for use with the arc marking device according to a first aspect of the invention. The pivot support adapter includes a connecting device and an adapter pivot device; wherein the connecting device is operable to connect the pivot support adapter to a support, and the adapter pivot device is operable to provide floating pivot support.

[0030] The pivot support adapter advantageously includes an adapter member and a connecting member, the adapter member and the connecting member being fixed relative to each other in a substantially perpendicular relationship; wherein the connecting member includes a connecting means operable to connect the pivot support adapter to the support member, and the adapter member includes the adapter pivot means.

[0031] The connecting device is advantageously operable to detachably connect the pivot support adapter to the support.

[0032] Advantageously, the length of the adapter component can be extended.

[0033] The adapter component advantageously includes a fixing member and an extension member, wherein the fixing member is advantageously fixed relative to the connecting member, and the extension member is movable to adjust the length of the adapter component.

[0034] The adapter pivot device is advantageously disposed on the extension member. Attached Figure Description

[0035] Various embodiments of the present invention will now be described with reference to the accompanying drawings, wherein: Figure 1 A schematic diagram of the arc marking device according to the first embodiment of the present invention is shown; Figures 2 to 4 Schematic diagrams of different aspects of the radius track in the arc marking device of the present invention are shown; Figures 5 to 7 Different views of the radius brake in the arc delineation device of the present invention are shown; Figures 8 to 12 It shows Figure 1 Different views of the pivot support adapter of the arc delineation device in the middle; Figure 13 A schematic diagram of the arc marking device according to a second embodiment of the present invention is shown; Figures 14 to 17 It shows Figure 13 Different views of the pivot support adapter of the arc delineation device in the middle; Figures 18 to 22 Different views of the ruler connector according to the present invention are shown; Figure 23 Different views of the jigsaw adapter according to the present invention are shown.

[0036] The invention will now be described in more detail with reference to the accompanying drawings. The arc-drawing device and its components may not be drawn to scale, and the parts may be merely schematic representations of components or other described entities.

[0037] Although the invention may be implemented in many different forms, specific embodiments are shown in the accompanying drawings and will be described in detail herein; it should be understood that the invention should be regarded as an example of the principles of the invention and is not intended to limit the invention to the specific embodiments shown and described. In the following description, the same reference numerals are used to denote the same, similar or corresponding parts in several views of the drawings.

[0038] In this document, relational terms such as “first” and “second,” “top” and “bottom” are used only to distinguish one entity or action from another, without necessarily requiring or implying any actual such relationship or order between these entities or actions. The terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements may include not only those elements but also other elements not expressly listed or inherent to such a process, method, article, or apparatus. The presence of additional identical elements in the process, method, article, or apparatus that includes an element preceded by “comprising one…” does not exclude, in the absence of further constraints, the presence of additional identical elements before that element.

[0039] Throughout this document, the terms "an embodiment," "some embodiments," "one embodiment," or similar expressions mean that a specific feature, structure, or characteristic associated with that embodiment is included in at least one embodiment of the invention. Therefore, the appearance of such phrases throughout this specification does not necessarily refer to the same embodiment. Furthermore, without limitation, specific features, structures, or characteristics can be combined in any suitable manner into one or more embodiments.

[0040] The term "or" as used herein should be understood as inclusive, meaning any one or any combination thereof. Therefore, "A, B, or C" means "any of the following: A, B, C; A and B; A and C; B and C; A, B, and C." Exceptions to this definition only arise when the combination of elements, functions, steps, or actions is inherently mutually exclusive to some extent.

[0041] To simplify the description and ensure clarity, reference numerals may be repeatedly used in the accompanying drawings to denote corresponding or similar elements. Numerous details are set forth herein to aid in understanding the embodiments described. However, these embodiments can also be implemented without these details. In other instances, well-known methods, processes, and components have not been described in detail to avoid obscuring the embodiments. This specification should not be construed as limiting the scope to the embodiments described herein.

[0042] Exemplary embodiments of the present invention and their components may not be drawn to scale, and the parts therein may only be schematic representations of components or other described entities. Detailed Implementation

[0043] refer to Figure 1A first embodiment of the arc marking device 10 according to the present invention includes a radius track 12 and a radius tool holder (radius tool support) 14. The radius track 12 is composed of a transverse pivot end member 16, a first track member 18A, and a second track member 18B, wherein the first track member 18A and the second track member 18B extend longitudinally and are at least substantially perpendicular to the transverse pivot end member 16. Figure 3 As shown, the first track member 18A and the second track member 18B extend from the pivot end member 16 in a parallel and spaced-apart relationship, forming a groove 20 between them. In another alternative embodiment, the radial track may consist of only a single track member (not shown).

[0044] refer to Figure 1 and Figure 4 The radius track 12 also includes a radius track pivot device in the form of a pivot hole 22 for determining a pivot point 23. In another alternative embodiment, the radius track pivot device may be in the form of a pivot pin (not shown). Furthermore, refer to... Figure 4 At least one of the first track member 18A and the second track member 18B includes a radius dimension scale 24A or 24B, the zero mark of which passes through the center of the pivot hole 22.

[0045] See also Figure 2 The tool holder 14 includes a tool mounting base 26 for mounting a tool 28 on the tool holder 14. The position of the tool mounting base 26 on the tool holder 14 allows the mounted tool 28 to be easily set via radius dimension scales 24A, 24B to cut the desired arc or circle at a predetermined radius (which can be measured from pivot point 23).

[0046] The tool holder 14 includes a pair of radius brakes 30A and 30B, which are operable to fix the radius tool holder 14 at a predetermined position on the radius track 12, the predetermined position corresponding to the radius of a predetermined arc path measured by radius dimension scales 24A and 24B.

[0047] See also Figure 5 , Figure 6 and Figure 7The tool holder 14 includes a base 32, which has a cuboid shape. The tool holder 14 has a first track receiver 34A and a second track receiver 34B. The first track receiver 34A and the second track receiver 34B are respectively configured as a first slot 36A and a second slot 36B, and both slots penetrate the base 32 of the tool holder 14. The arrangement and size of the first slot 36A and the second slot 36B are suitable for slidably accommodating the first track member 18A and the second track member 18B, respectively, wherein the first track member 18A and the second track member 18B respectively penetrate the first slot 36A and the second slot 36B, and the tool holder 14 can slide along the length direction of the radial track 12 (see...). Figure 1 and Figure 2 ).

[0048] The top surface of the base 32 includes a first brake hole 38A and a second brake hole 38B. The first brake hole 38A and the second brake hole 38B extend downward in a direction substantially perpendicular to the first slot 36A and the second slot 36B, intersecting and penetrating to the first brake hole 38A and the second brake hole 38B.

[0049] Radial brakes 30A and 30B include a first radial brake pad 40A and a second radial brake pad 40B. The dimensions of the first radial brake pad 40A and the second radial brake pad 40B are designed so that they can pass through the first brake hole 38A and the second brake hole 38B, respectively.

[0050] The first radius brake 30A has a first lever pivot pin support 42A. The first lever pivot pin support 42A has a pair of generally vertical members 44A and 46A. These two vertical members 44A and 46A extend upward from the top surface of the base 32. A first lever pivot pin support member 48A extends between the pair of vertical members 44A and 46A, such that the first lever pivot pin support member 48A rises to cover the top surface of the base 32 and extends along and covers the first slot 36A.

[0051] A first brake pivot pin 50A is supported on the first lever pivot pin support member 48A, which is fixed relative to the first lever pivot pin support member 48A and extends substantially perpendicular to the first lever pivot pin support member 48A.

[0052] The first radius brake 30A has an elongated rod 52A, one end of which has a handle portion 54A, and the other end (opposite end) has an actuating end 56A. The handle portion 54A is ergonomically designed to facilitate user operation of the rod 52A and provide a comfortable grip, while also reducing the force required to actuate the first radius brake 30A. The actuating end 56A has a cam surface 58A, a locking ratchet 60A, and a pivot pin hole (not shown). In another alternative embodiment, the radius brakes 30A and 30B can be clamps, such as lever clamps or screw clamps.

[0053] The locking ratchet 60A includes a latch 62A and a locking pin 64A. The latch 62A includes a plurality of latches 66A and is fixed relative to the actuating end 56A. The locking pin 64A has a locking pin pivot pin 68A, which allows the locking pin 64A to pivot relative to the latch 62A. One end of the locking pin 64A is a release actuation portion 70A, and the other end (opposite end) is a latch engagement portion 72A. The locking pin 64A is equipped with a biasing spring (not shown) that applies a biasing force to the locking pin 64A around the locking pin pivot pin 68A, such that during normal use, the locking engagement portion 72A is biased against the locking pin 64A to engage with the plurality of latches 66A; and during actuation of the lever 52A, it can engage with adjacent latches among the plurality of latches 66A.

[0054] The first radius brake pad 40A has a first pair of spaced-apart side lugs 74A, 76A, which extend upward from the top surface of the brake pad 40A. Each side lug 74A, 76A is provided with a pivot hole 78A. Although each of the two side lugs 74A, 74B is provided with a pivot hole, only the pivot hole is visible in the figures. Figure 5 One of them. The pivot hole 78A is elliptical, with two opposing long sides and two opposing semi-circular ends.

[0055] The rod 52A is disposed between the pair of spaced-apart side lugs 74A and 76A. The first brake pivot pin 50A is fixed relative to the actuating end 56A of the rod 52A, and the pivot pin 50A passes through each of the pivot holes 78A of the first side lug 74A, the second side lug 76A, and (another not shown) pivot hole.

[0056] Similarly, the structure of the second radius brake 30B is the same as that of the first radius brake 30A, and the operation is the same, so as to engage the second brake pad 40B with the second track member 18B, thereby locking the tool holder 14 on the radius track 12 at a position corresponding to the desired predetermined radius.

[0057] When using this tool, if an arc needs to be drawn on a workpiece, the radius track 12 must first be placed on the workpiece on which the arc is to be marked or cut. The radius track 12 is temporarily fixed to the workpiece by means of a nail or screw through the pivot hole 22 on the transverse pivot end member 16, thereby achieving the anchoring of the radius track 12 on the workpiece.

[0058] First, release the first radius brake 30A and the second radius brake 30B, allowing the tool holder 14 to slide along the length of the first track member 18A and the second track member 18B. By sliding the tool holder 14, the radius dimension of the radius marker or radius cutting tool 28 mounted on it is aligned with the scale on the radius dimension scales 24A and 24B, thus setting the desired predetermined radius of the arc to be drawn.

[0059] When the tool holder 14 is set to the desired predetermined radius position on the radius track 12, the first radius brake 30A and the second radius brake 30B are actuated, so that the first brake pad 40A and the second brake pad 40B are respectively clamped on the first track member 18A and the second track member 18B, thereby locking the tool holder 14 at the position corresponding to the desired predetermined radius.

[0060] After mounting the marker or cutting tool 28 on the tool mount 26, rotating the radius track 12, the tool holder 14, and the marker / cutting tool 28 around the pivot point 23 allows an arc to be drawn with the desired predetermined radius. "Drawing an arc" here includes, but is not limited to, marking an arc on the workpiece surface or cutting an arc on the workpiece.

[0061] Anchoring the radius track 12 directly to the workpiece may have drawbacks, as it may damage the workpiece, especially when the workpiece has a finished (finished) surface.

[0062] refer to Figure 1 and Figures 8 to 12 The arc marking device 10 of the present invention also includes a pivot support adapter 80.

[0063] The pivot support adapter 80 is provided with a connecting device 82 and an adapter pivot device 84. The connecting device 82 is operable to connect the pivot support adapter 80 to a support 86 (e.g., part of a worktable). The adapter pivot device 84 is operable to mate with a pivot hole 22 to provide a pivot point 23.

[0064] The pivot support adapter 80 includes a connecting member 88 and an adapter member 90. The connecting member 88 and the adapter member 90 are fixed relative to each other in a substantially perpendicular relationship.

[0065] The shape and size of the connecting member 88 are designed to allow it to slide within an open rectangular C-shaped track 92 (e.g., fixed to a workbench). The C-shaped track 92 has an elongated top opening 94 along its longitudinal length.

[0066] The connecting member 88 has opposing fixed ends 96 and 98 and a central portion 100. Each of the opposing fixed ends 96 and 98 is equipped with a threaded fixing bolt 102 and 104, which can be screwed into corresponding threaded holes penetrating the connecting member 88. Tightening the threaded fixing bolts 102 and 104 downwards to the bottom of the C-shaped rail 92 causes the connecting member 88 to abut against the upper part of the C-shaped rail 92 and applies force, thereby clamping the connecting member 88 onto the C-shaped rail 92. In other words, the threaded fixing bolts 102 and 104 act as screws, clamping the pivot support adapter 80 in the desired position by screwing them downwards into the C-shaped rail 92 and utilizing the C-shaped structure of the C-shaped rail 92 to generate upward pressure.

[0067] The adapter component 90 extends upward from the central portion 100 of the connecting component 88 to form a raised support portion 106. This raised support portion 106 extends to a lower cantilevered pivot support portion 108, which, in use, covers the plane containing the top surface of the workpiece. The raised support portion 106 provides additional support for the load on the lower cantilevered pivot support portion 108. Simultaneously, the raised support portion 106 also functions as an ergonomic handle for easy operation of the pivot support adapter 80 and the device 10.

[0068] The pivot support 108 has a distal end 110 with an upwardly extending pivot pin 112 for engaging with a pivot hole 22 on the radial track 12. The pivot support 108 has alignment lines 114, which can be marked as cross lines on the top surface or inside the pivot support 108. The alignment lines 114 intersect at the bottom of the pivot pin 112. The alignment lines 114 visually indicate the position of the pivot point, facilitating adjustment of the adapter member 90 so that the pivot pin 112 is positioned corresponding to the pivot point. In other words, the alignment lines 114 (which can be designed as XY cross-shaped marking grooves) allow the user to precisely position the pivot pin 112 above the desired center point (or centroid) to mark an arc path on the workpiece with a desired or predetermined radius.

[0069] In use, the pivot support adapter 80 is connected to a support (e.g., a support worktable with an open square C-shaped track 92, which is fixed to the support worktable, not shown). When connecting the pivot support adapter 80, first insert the connecting member 88 of the pivot support adapter 80 into the open square C-shaped track 92 and slide it along the track to the desired position. Then, threaded bolts 102 and 104 are tightened through the top opening 94 to the bottom of the square C-shaped track 92, clamping the connecting member 88 onto the square C-shaped track 92 in a fixed fit, thereby fixing the connecting member 88 relative to the open square C-shaped track 92.

[0070] After connecting and fixing the pivot support adapter 80 to the support worktable, the pivot hole 22 of the radius track 12 is fitted onto the pivot pin 112, so that the pivot pin 112 passes through the pivot hole 22. At this time, the radius track 12 is supported by the pivot support part 108, and the pivot point 23 can be formed without directly connecting the radius track 12 to the workpiece. Therefore, the pivot support adapter 80 can provide a contactless pivot point 23.

[0071] With the pivot support adapter 80 connected and relatively fixed to the support worktable, and the radius rail 12 supported by the pivot support adapter 80, the radius rail 12, the tool holder 14, and the marker / cutting tool 28 can rotate around the non-contact pivot point 23 to draw an arc with the desired predetermined radius without providing the pivot point 23 by connecting, fixing, or any contact with the workpiece.

[0072] refer to Figures 13 to 17 The alternative second embodiment of the arc marking device 200 includes a radius track 12, which has the same structure and function as the first embodiment.

[0073] The arc marking device 200 also includes an alternative embodiment of a pivot support adapter 202. The pivot support adapter 202 has a connecting member 204 and an adapter member 206. The connecting member 204 and the adapter member are fixed relative to each other in a substantially perpendicular relationship.

[0074] The connecting member 204 can be detachably connected to the support member (not shown) via a pair of clamps 208, 210. The clamps 208, 210 can be lever clamps or screw clamps, etc. The support member (not shown) can be part of the support table, or it can be a window sash clamp, or even a piece of wood clamped or secured to the table in other ways. However, the support member must be able to provide support for a stable table as an anchor.

[0075] The adapter member 206 extends from the upper part of the connecting member 204. The adapter member 206 includes a fixing member 212 and an extension member 214. The fixing member 212 is fixed relative to the connecting member 204. The extension member 214 is slidable along (and relative to) the top surface of the fixing member 212, such that the extension member 214 cantilevered out from the fixing member 212, and the length of the adapter member 206 can be adjusted by sliding.

[0076] The extension member 214 serves as the pivot support 216 of the adapter member 206, and has a distal end 218 with a pivot device in the form of an upwardly extending pivot pin 220 for engaging with a pivot hole 22 on the radial track 12. The distal end 218 has alignment lines 222, which can be marked as intersecting lines on the top surface or inside the distal end 218. The alignment lines 222 intersect each other at the bottom of the pivot pin 220. The alignment lines 222 visually indicate the position of the pivot point, thereby facilitating the adjustment of the adapter member 206 so that the pivot pin 220 is positioned corresponding to the pivot point 23.

[0077] The adapter component 206 is provided with an adapter component clamp 224, which is operable to clamp the extension component 214 and the fixing component 212 relative to each other at a predetermined desired length position of the adapter component 202. The predetermined desired length of the adapter component 202 depends on the distance between the support component (not shown) to which the connecting component 204 is connected and the predetermined desired position of the pivot point 23.

[0078] In use, the pivot support adapter 202 is connected to the support (e.g., a window sash clamp, not shown, clamped on the support worktable) via clamps 208 and 210.

[0079] After the pivot support adapter 202 is connected and fixed to the support workbench, the position of the extension member 214 can be adjusted relative to the fixed member 212 so that the adapter member 206 reaches the predetermined required length; and the extension member 214 and the fixed member 212 are clamped and fixed to that length by using the adapter member clamp 224.

[0080] The pivot hole 22 of the radius track 12 is fitted onto the pivot pin 220, so that the pivot pin 220 passes through the pivot hole 22. At this time, the radius track 12 is supported by the pivot support 216, and the pivot point 23 can be formed without directly connecting the radius track 12 to the workpiece. Therefore, the pivot support adapter 206 provides an adjustable contactless pivot point 23.

[0081] With the pivot support adapter 206 connected and fixed to the support worktable, and the radius rail 12 supported by the pivot support 216, the radius rail 12, the tool holder 14, and the marker / cutting tool 28 can rotate around the non-contact pivot point 23 to draw an arc with the desired predetermined radius, without providing the pivot point 23 by connecting, fixing, or any contact with the workpiece.

[0082] See also Figures 18 to 22 The arc marking device 10 / 200 according to the first or second embodiment of the present invention further includes a ruler connector 300. The ruler connector 300 is operable to connect tool 28 ( Figure 2 , Figure 22It is connected to the tool mounting base 26 located on the tool holder 14.

[0083] The ruler connector 300 has a cuboid housing 302, which has a tool side 304, a mounting side 306 opposite to the tool side, a first short side 308, and a second short side 310 opposite to the first short side 308.

[0084] The tool side 304 is provided with a first gauge rod hole 312 and a second gauge rod hole 314. The mounting side 306 is provided with a threaded mounting shaft 316 for connecting the gauge connector 300 to the tool mounting base 26, for example, via a wing nut.

[0085] The ruler connector 300 is provided with an adjusting rod 318, which has an adjusting rod end 320 and an adjusting rod head 322, wherein the adjusting rod head 322 is located at the end of the adjusting rod 318 opposite to the adjusting rod end 320. The adjusting rod end 320 abuts against the inner side of the second short side 310, the adjusting rod 318 penetrates the interior of the housing 302 and extends longitudinally therein, and passes through the first short side 308, and the adjusting rod 318 terminates at the adjusting rod head 322 at the first short side 308.

[0086] The adjusting rod 318 has a first threaded portion 324 and a second threaded portion 326. The first threaded portion 324 and the second threaded portion 326 are separated by a central washer 328 of the adjusting rod 318, and the thread directions of the first threaded portion 324 and the second threaded portion 326 are opposite.

[0087] The ruler connector 300 includes a first adjusting rod support 330, a second adjusting rod support 332, and an end adjusting rod support 334. The first adjusting rod support 330 and the second adjusting rod support 332 are disposed within the housing and abut against a central washer 328, while the end adjusting rod support 334 is disposed within the housing 302 and adjacent to the rod end 320. The central washer 328 is fixed to the adjusting rod 318 by, for example, welding. When the adjusting rod 318 rotates, the first adjusting rod support 330 and the second adjusting rod support 332 serve to hold the central washer 328 in a centered position, thereby preventing lateral (i.e., sideways) displacement of the first threaded portion 324 and the second threaded portion 326.

[0088] The ruler connector 300 is provided with a first ruler rod moving ring 336 and a second ruler rod moving ring 338. The first ruler rod moving ring 336 and the second ruler rod moving ring 338 are respectively disposed on the first threaded portion 324 and the second threaded portion 326. Each of the first ruler rod moving ring 336 and the second ruler rod moving ring 338 is provided with an internal thread, which engages with the first threaded portion 324 and the second threaded portion 326 respectively, so that when the adjusting rod 318 is rotated, the first ruler rod moving ring 336 and the second ruler rod moving ring 338 will move along the first threaded portion 324 and the second threaded portion 326 respectively. Since the threads of the first threaded portion 324 and the second threaded portion 326 are opposite in direction, when the adjusting rod 318 rotates in the first direction, the first gauge rod moving ring 336 and the second gauge rod moving ring 338 will move toward the central washer 328; when the adjusting rod 318 rotates in the opposite second direction, the first gauge rod moving ring 336 and the second gauge rod moving ring 338 will move away from the central washer 328.

[0089] The ruler connector 300 is provided with a first ruler rod 340 and a second ruler rod 342. The first ruler rod 340 and the second ruler rod 342 extend from the first ruler rod moving ring 336 and the second ruler rod moving ring 338, respectively, and extend out of the housing through the first ruler rod hole 312 and the second ruler rod hole 314.

[0090] In use, the distance between the first gauge rod 340 and the second gauge rod 342 is adjusted by rotating the adjusting rod 318. Depending on the direction of rotation, the first gauge rod moving ring 336 and the second gauge rod moving ring 338 will move along the first threaded portion 324 and the second threaded portion 326 towards the central washer 328 or away from the central washer 328. As the first gauge rod moving ring 336 and the second gauge rod moving ring 338 move along the first threaded portion 324 and the second threaded portion 326, the distance between the first gauge rod 340 and the second gauge rod 342 will be adjusted accordingly to match the gauge rod receivers 344 and 346 of the tool 28. Because the threads of the first threaded portion 324 and the second threaded portion 326 are in opposite directions, the first ruler rod moving ring 336 and the second ruler rod moving ring 338 will move in opposite directions along the adjusting rod 318, thereby increasing or decreasing the gap between the first ruler rod 340 and the second ruler rod 342. This allows the ruler rod connector 300 to adapt to different tools and / or tools from different manufacturers with different ruler rod gaps. Since the central washer 328 is held in the center position and does not undergo lateral displacement, the first ruler rod 340 and the second ruler rod 342 always remain equidistant from each other. Therefore, any tool connected to the first ruler rod 340 and the second ruler rod 342 will also be connected and aligned with the center of the ruler connector 300.

[0091] refer to Figure 22 A power tool (such as a drill 348) can be used to engage the adjusting rod head 322 to rotate the adjusting rod 318.

[0092] See also Figure 23 According to the first or second embodiment of the present invention, the arc marking device 10 / 200 further includes a jigsaw adapter 400. The jigsaw adapter 400 is an elongated L-shaped member 402, which has a tool mounting base connection portion 404, and the connection portion has a properly positioned connection hole 406 for connecting to the tool mounting base 26 on the tool holder 14.

[0093] The jigsaw adapter 400 also includes a jigsaw engagement end 408, which is disposed on one end of the elongated L-shaped member 402 opposite to the tool mount connection portion 404. The jigsaw engagement end 408 is inserted into an adapter receiver 410 disposed on the jigsaw 412.

[0094] The arc marking device 10 / 200 according to the first or second embodiment of the present invention further includes a marker adapter (not shown). For example, the marker adapter may be an adapter for holding a pencil, which can be connected to the tool mounting base 26, thereby enabling the drawing or marking of arcs on the workpiece with a predetermined desired radius as described above.

[0095] Having described exemplary embodiments of the present invention, those skilled in the art should understand that the present invention is merely illustrative, and various other substitutions, modifications, and adjustments can be made within the scope of the present invention. Therefore, the present invention is not limited to the above embodiments, but only to the claims.

Claims

1. An arc marking device for marking a predetermined arc path on a workpiece, characterized in that, include: A radial track having a radial track pivot device that provides a pivot point about which the radial track can rotate; A radius tool holder, which has a radius brake; The radius brake is operable to fix the radius tool holder at a predetermined position on the radius track, the predetermined position corresponding to the radius of the predetermined arc path; The arc delineation device further includes a pivot support adapter, which has a connecting device and an adapter pivot device; The connecting device is operable to connect the pivot support adapter to the support, and the adapter pivot device is configured to cooperate with the radius track pivot device to provide the pivot point.

2. The arc marking device according to claim 1, characterized in that, The pivot support adapter includes an adapter member and a connecting member, the adapter member and the connecting member being fixed relative to each other in a substantially perpendicular relationship; wherein the connecting member includes a connecting means operable to connect the pivot support adapter to the support member, and the adapter member includes the adapter pivot means.

3. The arc marking device according to claim 1 or 2, characterized in that, The connection device is operable to detachably connect the pivot support adapter to the support.

4. The arc marking device according to any one of claims 1-3, characterized in that, The length of the adapter component can be extended.

5. The arc marking device according to claim 4, characterized in that, The adapter component includes a fixing component and an extension component, wherein the fixing component is fixed relative to the connecting component, and the extension component is movable to adjust the length of the adapter component.

6. The arc marking device according to claim 5, characterized in that, The adapter pivot device is disposed on the extension member.

7. The arc marking device according to claim 5 or 6, characterized in that, The extension member can be fixed in a predetermined position relative to the fixed member.

8. The arc marking device according to any one of claims 2-7, characterized in that, The radius track pivot assembly includes a pivot hole, and the adapter pivot assembly includes a pivot pin, the pivot pin being configured and sized to extend through the pivot hole to provide a pivot point about which the radius track can rotate.

9. The arc marking device according to any one of claims 1-8, characterized in that, The radius track includes one or more track members, and the radius tool holder includes one or more corresponding track receivers. The track receivers are configured and sized to accommodate the track members or each corresponding track member and allow the radius tool holder to move along the length of the radius track in a slidable relationship.

10. The arc marking device according to claim 9, characterized in that, The track receiver, or each track receiver, is a hole.

11. The arc marking device according to claim 9 or 10, characterized in that, The radius tool holder includes one or more brake holes corresponding to one or more track receivers, the respective one or more brake holes extending in a direction substantially perpendicular to the direction of the respective track receiver to intersect with it.

12. The arc marking device according to claim 11, characterized in that, The radius tool holder includes a brake actuator associated with each of one or more radius brakes, wherein the brake actuator is operable to pass the associated radius brake through an associated brake hole and clamp the radius tool holder at a predetermined radius position on an associated radius track, the predetermined radius position corresponding to a predetermined radius of the desired arc to be drawn.

13. The arc marking device according to any one of claims 1-12, characterized in that, The radius tool holder includes a tool mount for mounting tools onto the radius tool holder.

14. The arc marking device according to claim 13, characterized in that, It includes a ruler connector and a pair of ruler rods; the ruler connector has a ruler connector connection device for connecting it to the tool mounting base, and the spacing between the pair of ruler rods is adjustable.

15. The arc marking device according to claim 13, characterized in that, The tool mount is operable to mount the tool onto the radius tool holder.

16. The arc marking device according to claim 13, characterized in that, It includes a marker connector and a marker holder for holding the marker; the marker connector has a marker connector connection means for connecting it to the tool mount.

17. The arc marking device according to claim 13, characterized in that, It also includes a jigsaw adapter having a tool mount connection for connecting it to the tool mount and a jigsaw connection for configuring it to connect to a jigsaw power tool.

18. A ruler connector, characterized in that, It includes a ruler connector connection device for connecting the ruler connector to the tool mounting base, a pair of ruler rods, and a ruler rod adjustment device operable to adjust the spacing between the pair of ruler rods.

19. The ruler connector according to claim 18, characterized in that, The ruler rod adjustment device includes an adjustment rod having a first threaded portion and a second threaded portion, wherein the first threaded portion and the second threaded portion have opposite thread directions.

20. The ruler connector according to claim 19, characterized in that, The first threaded portion and the second threaded portion are separated by a non-threaded portion.

21. The ruler connector according to claim 18 or 19, characterized in that, The ruler rod adjustment device includes a first ruler rod moving ring and a second ruler rod moving ring, wherein the first ruler rod moving ring and the second ruler rod moving ring each include internal threads for engaging with the first threaded portion and the second threaded portion, respectively, and the rotation of the adjusting rod causes the first ruler rod moving ring and the second ruler rod moving ring to move along the first threaded portion and the second threaded portion, respectively, so as to adjust the distance between the pair of ruler rods.

22. A pivot support adapter for use with an arc delineation device according to any one of claims 1-17, the pivot support adapter.

Images