Tool handle

Abstract

Tool handle, comprehensive a handle section (10); a connecting rod (20) extending along an axial direction (A) and defining a circumferential direction (B) around the axial direction (A), wherein the connecting rod (20) is rotationally fixed to the handle section (10), wherein the connecting rod (20) has a connecting section (21), wherein the connecting section (21) forms a receptacle (211) for inserting a tool head (50), wherein a guide groove (212) extending along the circumferential direction (B) is provided on the outside of the connecting section (21), wherein the connecting rod (20) further comprises a locking section (22) located along the extension path of the guide groove (212), wherein a connecting end (221) of the locking section (22) is integrally connected to the connecting section (21), and wherein a detent section (222) of the locking section (22) extends away from the connecting end in the axial direction (A). (221) extends,wherein the locking section (222) is radially pivotable relative to the receptacle (211); , a positioning ring (30) which is attached to the connecting section (21) and is radially elastically deformable, wherein the positioning ring (30) is provided with a projection (31) which is slidably received in the guide groove (212); and a control element (40) which is mounted on the positioning ring (30) and is in a rotationally fixed relationship with it, wherein the control element (40) can drive the positioning ring (30) to rotate between a first position and a second position; wherein, when the positioning ring (30) is in the first position, the projection (31) rests radially against the detent section (222), the detent section (222) engaging in a detent groove (51) of the tool head (50) and not pivotable relative to the tool head (50), and when the positioning ring (30) is in the second position, the projection (31) is spaced away from the detent section (222) so that the detent section (222) is pivotable relative to the tool head (50).

Description

Technical field

[0001] The invention relates to a tool with quickly interchangeable tool heads, in particular a tool handle. State of the art

[0002] Conventional tool handles typically employ a push-button release mechanism. This mechanism, in conjunction with an elastic element, causes a detent to engage in a groove on the tool head, thus securing it in position. To change the tool head, force must be applied to the release element to overcome the elastic force, allowing the detent to retract from the groove and the tool head to be removed. However, such designs carry the risk of disengagement during use due to accidental contact, vibration, or fatigue of the elastic element. Furthermore, the release and positioning functions usually depend on a single elastic element, resulting in insufficient stability.

[0003] Therefore, it is necessary to provide a novel and advanced tool handle to solve the problems mentioned above. Object of the invention

[0004] The object of the invention is to provide a tool handle that enables a quick exchange of tool heads.

[0005] This problem is solved by the tool handle of the invention, which comprises: a handle section;a connecting rod extending along an axial direction and defining a circumferential direction around the axial direction, wherein the connecting rod is rotationally fixed to the handle section, wherein the connecting rod has a connecting section, the connecting section forming a receptacle for inserting a tool head, wherein a guide groove extending along the circumferential direction is provided on the outside of the connecting section, wherein the connecting rod further has a locking section located along the extension path of the guide groove, wherein a connecting end of the locking section is integrally connected to the connecting section, wherein a detent section of the locking section extends in the axial direction away from the connecting end, the detent section being radially pivotable relative to the receptacle;a positioning ring that is attached to the connecting section and is radially elastically deformable, wherein the positioning ring is provided with a projection that is slidably received in the guide groove; and a control element that is placed on the positioning ring and is in a rotationally fixed relationship with it, wherein the control element can drive the positioning ring to rotate between a first position and a second position; wherein, when the positioning ring is in the first position, the projection rests radially firmly against the detent section, the detent section engaging in a detent groove of the tool head and not being pivotable relative to the tool head, and when the positioning ring is in the second position, the projection is spaced away from the detent section so that the detent section is pivotable relative to the tool head. Brief description of the drawings Fig. 1 a perspective view of the embodiment of the invention; Fig. 2 an exploded view of the embodiment of the invention; Fig. 3 a partial exploded view of the embodiment of the invention; Fig. 4 a further partial exploded view of the embodiment of the invention; Fig. 5 a sectional view of the positioning ring in the first position of the embodiment of the invention; Fig. 6 a sectional view of the positioning ring in the second position of the embodiment of the invention; Fig. 7 another exploded view of the positioning ring in the first position of the embodiment of the invention; Fig. 8 another exploded view of the positioning ring in the second position of the embodiment of the invention; Fig. 9 a sectional view of the interaction of the limiting projections and the limiting grooves of the embodiment of the invention. Ways to implement the invention

[0006] Fig. Figures 1 to 9 show an embodiment of the invention. The tool handle 1 of the invention comprises: a handle section 10, a connecting rod 20, a positioning ring 30 and a control element 40.

[0007] The connecting rod 20 extends along an axial direction A and defines a circumferential direction B around the axial direction A. The connecting rod 20 is rotationally fixed to the handle section 10. In particular, a coupling section of the connecting rod 20 has a non-circular shape (such as an oval, polygonal, or multi-plane shape), and a coupling hole of the handle section 10 is designed as a non-circular hole corresponding to the shape of the coupling section.

[0008] The connecting rod 20 has a connecting section 21, wherein the connecting section 21 forms a receptacle 211 for inserting a tool head 50. A connecting end section 52 of the tool head 50 is inserted into the receptacle 211, wherein the connecting end section 52 and the receptacle 211 are designed as complementary polygonal shapes to ensure a rotationally fixed connection.

[0009] A guide groove 212 extending along the circumferential direction B is provided on the outside of the connecting section 21. The connecting rod 20 also has a locking section 22 located along the path of the guide groove 212. A connecting end 221 of the locking section 22 is integrally connected to the connecting section 21. A detent section 222 of the locking section 22 extends axially away from the connecting end 221, and the detent section 222 is radially pivotable relative to the receptacle 211. The positioning ring 30 is attached to the connecting section 21 and is radially elastically deformable. The positioning ring 30 is designed as a C-ring with a radial recess 32. The positioning ring 30 has a projection 31 that slides in the guide groove 212.The control element 40 is mounted on the positioning ring 30 and is in a rotationally fixed relationship with it. Several radially projecting limiting ribs 34 are provided on the outer circumference of the positioning ring 30, and several positioning grooves 45 are provided on the inner surface of the control element 40, with the limiting ribs 34 engaging in the positioning grooves 45. The control element 40 can drive the positioning ring 30 to rotate between a first position and a second position.

[0010] Here, the projection 31 rests radially firmly against the detent section 222 when the positioning ring 30 is in the first position ( Fig. 5 and Fig. 7) is located, wherein the detent section 222 engages in a detent groove 51 of the tool head 50 and is not pivotable relative to the tool head 50. When the positioning ring 30 is in the second position ( Fig. 6 and Fig. 8) is located, the projection 31 is spaced away from the detent section 222, so that the detent section 222 is pivotable relative to the tool head 50.

[0011] Furthermore, a detent projection 223 projecting towards the tool head 50 is provided on the detent section 222, wherein the detent projection 223 can optionally be engaged in the detent groove 51.

[0012] Therefore, by switching the positioning ring 30 between the first and second positions, the detent section 222 can be selectively locked or unlocked. This allows the tool head 50 to be stably positioned in the locked state and not easily come loose, while in the unlocked state it can be quickly removed for rapid replacement. Furthermore, the detent section 222 is subject to a design limitation, ensuring a stable connection and high connection stability, even with slight rotation of the control element 40 due to accidental contact or vibration, while still allowing for quick replacement.

[0013] The detent section 222 projects radially into the guide groove 212. The projection 31 has an inclined surface 311 on a side facing the locking section 22 in the circumferential direction B, the inclined surface 311 being able to press against the locking section 22 in the circumferential direction B. Furthermore, the detent section 222 has a convex arcuate surface 224 on a side facing the positioning ring 30, the projection 31 being able to press firmly radially against the convex arcuate surface 224. When the positioning ring 30 rotates into the first position, the inclined surface 311 gradually pushes the locking section 22 inwards (radially), causing the detent section 222 to be pressed firmly into place.

[0014] The hardness of the connecting rod 20 is greater than that of the positioning ring 30, and the hardness of the control element 40 is greater than that of the positioning ring 30. The connecting rod 20 and the control element 40 are each made of glass fiber reinforced nylon, while the positioning ring 30 is made of polyoxymethylene (POM). The connecting rod 20 and the control element 40 can stably withstand the operating load and are wear-resistant, while the positioning ring 30 possesses adequate elasticity and resilience to absorb vibrations. The hardness of the connecting section 21 is greater than that of the positioning ring 30, thus enabling the connecting section 21 to stably withstand the operating load.

[0015] The positioning ring 30 has a first positioning section 33, and the connecting section 21 has several second positioning sections 23 spaced apart circumferentially. Either the first positioning section 33 or each of the second positioning sections 23 is designed as a recess, while the other is designed as a detachable detent projection that engages in the recess. When the positioning ring 30 is in the first position, the first positioning section 33 engages in one of the second positioning sections 23, and when the positioning ring 30 is in the second position, the first positioning element 33 engages in another of the second positioning sections 23 to ensure stable positioning.The first positioning section 33 is arranged close to the recess 32, with the locking projection being designed as an arcuate projection and the recess as an arcuate groove, enabling the first positioning section 33 to snap into the second positioning section 23 in a force-saving and smooth manner.

[0016] The outer circumference of the connecting section 21 is provided with several radially projecting limiting projections 213, which are spaced apart in the circumferential direction B. Several limiting grooves 44 are provided on the inner side of the control element 40, which are also spaced apart in the circumferential direction B. The extent C1 of each limiting groove 44 in the circumferential direction B is greater than the extent C2 of each limiting projection 213 in the circumferential direction B. Each limiting projection 213 engages relatively movably in one of the limiting grooves 44, as shown in Fig.Figure 9 shows how to limit the maximum rotation angle of control element 40.

[0017] The outer circumference of the connecting section 21 forms a radially projecting annular flange 24. The control element has a through-bore 41 that includes a large-diameter bore 411, a small-diameter bore 412, and a shoulder 413 between the large-diameter bore 411 and the small-diameter bore 412. The connecting section 21 passes through the through-bore 41, with the annular flange 24 located within the large-diameter bore 411 and bearing against the shoulder 413 in the axial direction A. An end section 214 of the connecting section 21 passes through the small-diameter bore 412, so that the end section 214 is exposed and guided through the small-diameter bore 412, thereby improving rotational coaxiality and operational stability.The control element has an operating section 42 and several snap sections 43, the operating section 42 being arranged radially on the outside of the snap sections 43 and concealing them. The snap sections 43 are detachably latched to the connecting rod 20, thus preventing accidental contact with the snap sections 43 during use.

[0018] In summary, the invention provides a tool handle comprising: a handle section; a connecting rod connected to the handle section, the connecting rod having a connecting section, the connecting section forming a receptacle, with a guide groove provided on the outside of the connecting section, the connecting rod further comprising a locking section located along the extension path of the guide groove, a connecting end of the locking section being integrally connected to the connecting section, and a detent section of the locking section being radially pivotable relative to the receptacle; a positioning ring attached to the connecting section, the positioning ring having a projection that is slidably received in the guide groove; and a control element placed on the positioning ring. Reference symbol list 1 tool handle 10 Handle section 20 Connecting rod 21 Connecting section 211 Recording 212 Guide groove 213 Limiting lead 214 Final section 22 Locking section 221 End of connection 222 Rest area 223 Rastvorsprung 224 convex arc surface 23 second positioning section 24 ring flange 30 Positioning ring 31 lead 311 inclined surface 32 recess 33 First positioning section 34 Boundary rib 40 Control element 41 Through hole 411 Large diameter bore 412 Small diameter bore 413 Shoulder 42 Operating section 43 Snap Section 44 Limit groove 45 Positioning groove 50 tool head 51 Locking groove 52 Connection end section A axial direction B Circumferential direction C1, C2 Extent measure

Claims

[1] Tool handle, comprising a handle section (10); a connecting rod (20) extending along an axial direction (A) and defining a circumferential direction (B) around the axial direction (A), wherein the connecting rod (20) is rotationally fixed to the handle section (10), wherein the connecting rod (20) has a connecting section (21), wherein the connecting section (21) forms a receptacle (211) for inserting a tool head (50), wherein a guide groove (212) extending along the circumferential direction (B) is provided on the outside of the connecting section (21), wherein the connecting rod (20) further comprises a locking section (22) located along the extension path of the guide groove (212), wherein a connecting end (221) of the locking section (22) is integrally connected to the connecting section (21), and wherein a detent section (222) of the locking section (22) extends away from the connecting end in the axial direction (A). (221) extends,wherein the locking section (222) is radially pivotable relative to the receptacle (211); a positioning ring (30) which is attached to the connecting section (21) and is radially elastically deformable, wherein the positioning ring (30) is provided with a projection (31) which is slidably received in the guide groove (212); and a control element (40) which is mounted on the positioning ring (30) and is in a rotationally fixed relationship with it, wherein the control element (40) can drive the positioning ring (30) to rotate between a first position and a second position; wherein, when the positioning ring (30) is in the first position, the projection (31) rests radially against the detent section (222), the detent section (222) engaging in a detent groove (51) of the tool head (50) and not pivotable relative to the tool head (50), and when the positioning ring (30) is in the second position, the projection (31) is spaced away from the detent section (222) so that the detent section (222) is pivotable relative to the tool head (50). [2] Tool handle according to claim 1, characterized by , that the hardness of the connecting rod (20) is greater than the hardness of the positioning ring (30). [3] Tool handle according to claim 2, characterized by, that the connecting rod (20) is made of glass fiber reinforced nylon, while the positioning ring (30) is made of polyoxymethylene (POM). [4] Tool handle according to claim 1, characterized by , that the hardness of the control element (40) is greater than the hardness of the positioning ring (30). [5] Tool handle according to claim 1, characterized by , that the positioning ring (30) has a first positioning section (33) and the connecting section (21) has several second positioning sections (23) spaced apart in the circumferential direction, wherein either the first positioning section (33) or each of the second positioning sections (23) is designed as a recess, while the other is designed as a detachably snapping detent projection in the recess, wherein when the positioning ring (30) is in the first position, the first positioning section (33) snaps into one of the second positioning sections (23). [6] Tool handle according to claim 4, characterized by , that the outer circumference of the connecting section (21) is provided with several radially projecting limiting projections (213) which are spaced apart in the circumferential direction (B), wherein several limiting grooves (44) are provided on the inside of the control element (40) which are also spaced apart in the circumferential direction (B), wherein the extent (C1) of each limiting groove (44) in the circumferential direction (B) is greater than the extent (C2) of each limiting projection (213) in the circumferential direction (B), and wherein each limiting projection (213) engages relatively movably in one of the limiting grooves (44). [7] Tool handle according to claim 1, characterized by , that the locking section (222) projects radially into the guide groove (212). [8] Tool handle according to claim 7, characterized by, that the projection (31) has an inclined surface (311) on a side facing the locking section (22) in the circumferential direction (B), wherein the inclined surface (311) can press against the locking section (22) in the circumferential direction (B). [9] Tool handle according to claim 1, characterized by, that the outer circumference of the connecting section (21) forms a radially projecting annular flange (24), wherein the control element (40) has a through bore (41) which includes a large-diameter bore (411), a small-diameter bore (412) and a shoulder (413) between the large-diameter bore (411) and the small-diameter bore (412), wherein the connecting section (21) passes through the through bore (41), wherein the annular flange (24) is located inside the large-diameter bore (411) and rests against the shoulder (413) in the axial direction (A), and wherein the end section (214) of the connecting section (21) passes through the small-diameter bore (412).

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