Adjustable hand tool

Abstract

An adjustable hand tool comprises a rod (10), a tool head (20), and a pivoting device (30). The tool head (20) is pivotally connected to the rod (10). The pivoting device (30) comprises an engagement element (31) and an axial element (32). The engagement element (31) is movably inserted through the tool head (20) and the rod (10). The engagement element (31) comprises an engagement portion (311) detachably engaged with an engagement hole (211) of the tool head (20), and a limiting portion (312) corresponding to a limiting hole (111) of the rod (10). The axial member (32) is movably inserted through the tool head (20), and the axial member (32) is fixedly connected to the engaging member (31) to drive the engaging member (31) and allow the engaging portion (311) to disengage from the engaging hole (211).

Description

[0001] The present invention relates to a hand tool and in particular to an angle-adjustable hand tool.

[0002] US11801595 B2 describes a tool with a buffer structure. The tool comprises a tool head with a connecting portion that receives a pivot pin. The connecting portion is in the shape of a hole and has first teeth. The pivot pin is inserted into the hole of the connecting portion and has second teeth that can be engaged with the first teeth of the connecting part. When the first and second teeth are engaged with each other, the tool head is secured against pivotal movement with respect to the shaft structure. However, the pivot pin of the aforementioned tool can fail due to stress concentrations during caulking operations, particularly in the connecting area between the hexagonal column portion adjacent to the second teeth and the cylindrical portion adjacent to the hexagonal column portion.

[0003] US 2020 / 0002145 A1 describes a galvanizing tool comprising a main body with a first and a second connecting portion and a galvanizing element set with a first and a second galvanizing element which are movably and detachably connected to the main body.

[0004] US 2010 / 0207081 A1 describes a tool suitable for prying comprising a handle with a pivotable end and a handle end, wherein the pivotable end has a through-hole.

[0005] US 2012 / 0223279 A1 describes a tool comprising a handle, a working device, a positioning device, a clamping device and a fine adjustment mechanism.

[0006] DE 10 2009 030 302 B3 describes a tool which can be used for breaking and clamping an object, comprising a handle which has a pivoting end and a gripping end.

[0007] The invention is defined by the features of the independent claim.

[0008] An adjustable hand tool includes a rod, a tool head, and a pivoting device. The rod includes a first pivoting portion with a limiting hole. The tool head includes a second pivoting portion with an engaging hole, a receiving hole, and a receiving slot communicating with the engaging hole and the receiving hole. The first pivoting portion is pivotally connected to the receiving slot. The pivoting device includes an engaging member and an axial member. The engaging member is movably inserted through the engaging hole and the limiting hole, and the engaging member includes an engaging portion removably engaged with the engaging hole and a limiting portion corresponding to the limiting hole.The axial member is movably inserted through the receiving hole, and the axial member is fixedly connected to the engaging member to drive the engaging member, thereby allowing the engaging portion to disengage from the engaging hole. Fig. 1 shows a perspective view of an adjustable hand tool according to an embodiment of the present invention; Fig. 2 shows a perspective partially exploded view of the adjustable hand tool of Fig. 1; Fig. 3 shows another perspective partially exploded view of the adjustable hand tool of Fig. 1; Fig. 4 shows a cross-sectional view of the adjustable hand tool of Fig. 1 and shows the engagement element in the locked position; Fig. Figure 5 shows a cross section along line 5-5 of Fig. 4; Fig. 6 shows a continuation view of Fig. 4 and shows the engagement element in the unlocked position; and Fig. 7 shows a continuation view of Fig. 5 and shows the engagement element in the unlocked position and the tool head adjusted in angle relative to the rod.

[0009] The Fig. 1 to 7 show an adjustable hand tool according to an embodiment of the present invention. The adjustable hand tool includes a rod 10, a tool head 20, and a pivoting device 30. The rod 10 has a first pivoting portion 11 with a limiting hole 111. The tool head 20 has a second pivoting portion 21 with an engaging hole 211, a receiving hole 212, and a receiving slot 213 communicating with the engaging hole 211 and the receiving hole 212, and the first pivoting portion 11 is pivotally connected to the receiving slot 213. The pivoting device 30 includes an engaging member 31 and an axial member 32. The engaging member 31 is movably inserted through the engaging hole 211 and the restricting hole 111, and the engaging member 31 has an engaging portion 311 detachably engaged with the engaging hole 211 and a restricting portion 312 corresponding to the restricting hole 111.The axial member 32 is movably inserted through the receiving hole 212, and the axial member 32 is fixedly connected to the engaging member 31 to drive the engaging member 31 and allow the engaging portion 311 to disengage from the engaging hole 211. Therefore, the tool head 20 can be selectively adjusted in angle relative to the rod 10 by the pivot device 30.

[0010] In the embodiment, the engagement member 31 is configured to be driven by the axial member 32 to move between a locked position ( Fig. 4) and an unlocked position ( Fig. 6) along an axis A relative to the engagement hole 211 and the limiting hole 111. The axial element 32 is configured to move along the axis A between a first position ( Fig. 4) and a second position ( Fig. 6) relative to the receiving opening 212. When the engaging element 31 is in the locked position and the axial element 32 is in the first position, the engaging portion 311 is engaged with the engaging hole 211. When the engaging element 31 is in the unlocked position and the axial element 32 is in the second position, the engaging portion 311 is disengaged from the engaging opening 211.

[0011] The engaging element 31 has a through-hole 313 extending through opposite ends of the engaging element 31 along the axis A. The axial element 32 has a pressing portion 321 disposed in the receiving hole 212 and a body 322 extending from the pressing portion 321 along the axis A. The body 322 is fixedly connected to the through-hole 313, thereby enabling the axial element 32 to be fixedly connected to the engaging element 31 to drive the engaging element 31.

[0012] In addition, the through hole 313 has a large-diameter portion 314 and a small-diameter portion 315 along the axis A. The body 322 has a large-diameter portion 323 extending from the pressing portion 321 and corresponding to the large-diameter portion 314, and a small-diameter portion 324 extending from the large-diameter portion 323 and corresponding to the small-diameter portion 315 along the axis A. This increases the contact area between the engaging member 31 and the axial member 32 to prevent the problem of damage due to stress concentration.

[0013] In addition, the through-hole 313 further includes a rivet portion 316 located on a side of the small-diameter portion 315 opposite the large-diameter portion 314. The body 322 further includes a rivet portion 325 extending from the small-diameter portion 324 and exposed outside the small-diameter portion 315. The rivet portion 325 is riveted to the rivet portion 316.

[0014] In the embodiment, the restricting hole 111 may be a polygonal hole, and the restricting portion 312 may have a polygonal columnar shape. Furthermore, the restricting hole 111 may be a hexagonal hole, and the restricting portion 312 may have a hexagonal columnar shape.

[0015] In the embodiment, at least a part of an inner surface of the engaging hole 211 and at least a part of an outer surface of the engaging portion 311 are provided with corresponding teeth.

[0016] The pivoting device 30 further includes a biasing element 33 configured to bias the axial element 32 toward the first position. The biasing element 33 has two opposite ends, each elastically abutting the first pivoting portion 11 and the pressing portion 321 along the axis A. In the embodiment, the biasing element 33 may be a torsion spring and arranged in a sleeve-like manner around the body 322.

[0017] In the Fig. 4 and Fig. 5, the engaging element 31 is in the locked position and the axial element 32 is in the first position, the biasing element 33 is not compressed, and the engaging portion 311 of the engaging element 31 engages the engaging hole 211 of the second pivot portion 21. Therefore, the tool head 20 cannot be adjusted angularly relative to the rod 10.

[0018] In the Fig. 6 and Fig.7, when the pressing portion 321 of the axial member 32 is pressed by an external force, the axial member 32 is moved from the first position to the second position relative to the receiving hole 212, driving the engaging member 31 from the locked position to the unlocked position. The biasing member 33 is compressed, and the engaging portion 311 of the engaging member 31 disengages from the engaging hole 211 of the second pivot portion 21, thereby allowing the tool head 20 to be angularly adjusted relative to the rod 10. Once the force applied to the pressing portion 321 of the axial member 32 is released, the axial member 32 is biased from the second position back to the first position by the biasing member 33.

Claims

[1] Adjustable hand tool, with: a rod (10) with a first pivot section (11) which has a limiting hole (111); a tool head (20) with a second pivoting section (21) having an engagement hole (211), a receiving hole (212) and a receiving slot (213) communicating with the engagement hole (211) and the receiving hole (212), and wherein the first pivoting section (11) is pivotably connected to the receiving slot (213); and a pivoting device (30) with an engagement element (31) and an axial element (32), wherein the engagement element (31) is movably inserted through the engagement hole (211) and the limiting hole (111), wherein the engagement element (31) has an engagement section (311) which is detachably engaged with the engagement hole (211) and a limiting section (312) which corresponds to the limiting hole (111), wherein the axial element (32) is movably inserted through the receiving hole (212), and wherein the axial element (32) is fixedly connected to the engagement element (31) in order to drive the engagement element (31) and to allow the engagement section (311) to disengage from the engagement hole (211); wherein the engagement element (31) is configured to be driven by the axial element (32) to switch between a locked position and an unlocked position along an axis (A) relative to the engagement hole (211) and the limiting hole (111), wherein the axial element (32) is configured to move along the axis (A) between a first position and a second position relative to the receiving hole (212); when the engagement element (31) is in the locked position and the axial element (32) is in the first position, the engagement section (311) engages with the engagement hole (211); when the engagement element (31) is in the unlocked position and the axial element (32) is in the second position, the engagement section (311) is disengaged from the engagement opening (211); the engagement element (31) has a through hole (313) extending through opposite ends of the engagement element (31) along the axis (A), wherein the axial element (32) has a pressure section (321) arranged in the receiving hole (212) and a body (322) extending from the pressure section (321) along the axis (A), and wherein the body (322) is fixedly connected to the through hole (313); the through-hole (313) has a large-diameter section (314) and a small-diameter section (315) along the axis (A), and wherein the body (322) has a large-diameter section (323) extending from the thrust section (321) and corresponding to the large-diameter section (314), and a small-diameter section (324) extending from the large-diameter section (323) and corresponding to the small-diameter section (315) along the axis (A); and the through hole (313) further comprises a rivet section (316) arranged on a side of the small diameter section (315) facing away from the large diameter section (314), wherein the body (322) further comprises a rivet section (325) extending from the small diameter section (324) and exposed outside the small diameter section (315), and wherein the rivet section (325) is riveted to the rivet section (316). [2] Adjustable hand tool according to claim 1, wherein the limiting hole (111) is a polygonal hole, and wherein the limiting section (312) has a polygonal column shape. [3] Adjustable hand tool according to claim 2, wherein the limiting hole (111) is a hexagonal hole, and wherein the limiting section (312) has a hexagonal column shape. [4] Adjustable hand tool according to claim 1, wherein at least a part of an inner surface of the engagement hole (211) and at least a part of an outer surface of the engagement section (311) are provided with corresponding teeth. [5] Adjustable hand tool according to claim 1, wherein the pivoting device (30) further comprises a pre-tensioning element (33) configured to pre-tension the axial element (32) in the direction of the first position, and wherein the pre-tensioning element (33) has two opposite ends which each elastically come into contact with the first pivoting section (11) and the pressing section (321) along the axis (A). [6] Adjustable hand tool according to claim 5, wherein the preload element (33) is a torsion spring and is arranged in a sleeve-like manner around the body (322).

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