Pivotal handle assembly

Abstract: A pivotal handle assembly comprises a handle (1) for attachment to an associated component one end of the handle (1) being provided with a plurality of gear teeth (11) therearound and the one end extent of the handle having formed therein an axial bore (12) and a transverse hole (13) intersecting said axial bore (12), a fixing seat (2) for attachment to the component and having a plurality of gear teeth (21) thereon for ratchet-like engagement with the teeth (11) on the handle (1), a supporting shaft (3) extending from said fixing seat (2) to be received within the axial bore (12) within the handle (1) and including a transverse hole (32) therethrough which, with the gear teeth (11) on the handle (1) and the gear teeth (21) on the fixing seat (2) engaged, is aligned with the transverse hole (13) in the handle (1), and an eccentric control shaft (4) rotatable in the transverse hole (13) in the handle (1), such that, with the control shaft (4) in a first angular position, the teeth (11) on the handle (1) and the teeth (21) on the fixing seat (2) engage to prevent relative rotation between the handle (1) and the fixing seat (2), rotation of the control shaft (4) to a displaced angular position disengaging the teeth (11,21) to permit pivoting of the handle (1) relative to the fixing seat (2).

Description: The present invention relates to a pivotal handle assembly and especially to a pivotal device capable of changing the orientation of a handle, thus the handle can be installed to various products. Since the orientation of the handle is adjustable, it may be suitable for different requirement. Therefore, the user may use the product with the handle comfortably. In a prior art handle used in various products, for example, the handle of a waxing machine or handle of a health running machine, or handle of a bicycle, etc. The object of installing the handle is that a user may conveniently handle the product. However, the prior art handle is directly installed to a specific product. Thus, the user must meet the specific angle of the handle so as to suit the product. The user can not change the orientation of the handle with the requirement or demand himself (or herself). In fact, maybe some orientations of the handles are matched with the requirement of ergonomics. However, since everybody has its habit or pose, the conventional design often can not suit the requirement of everyone. Therefore, there is an eager demand for a handle the orientation of which is adjustable as desired. DE-A-4200042 discloses a handle assembly the handle of which can be pivoted relative to an associated component and in which gear teeth on the handle and gear teeth on the associated component can be moved into and out of engagement with one another by rotation of eccentric means to permit pivoting movement of the handle relative to the associated component. The primary object of the present invention is to provide a pivotal handle assembly the handle of which is rotatable by a movable piece at one side of the handle whereby a user may adjust the handle to a desired orientation. Then, the movable piece is returned to a preset position and the handle is fixed at a predetermined angle. Therefore the position of the handle can be located in a position to suit the user, and the user may use the product comfortably and conveniently. The handle can be installed on a waxing machine or other associated product so that the user can adjust the handle as desired whereby a preferred force-applied angle can be obtained and the waxing machine or other product can be used conveniently. According to the present invention there is provided a pivotal handle assembly comprising a handle for attachment to an associated component, one end of the handle having formed therein a protruded umbrella shaped portion with a plurality of teeth on the surface thereof, an axial through hole extending centrally from the umbrella shaped portion through the one end extent of the handle, a pivotal hole extending transversely through the one end of the handle to communicate with the through hole, a fixing seat of generally cylindrical shape for attachment to the component and having a front surface remote from the component on which is formed a concave umbrella shaped portion with a plurality of teeth on the surface thereof, a rectangular post extending from the rear surface of the fixing seat and having a central hole therein, a pin hole extending transversely through the rectangular post to communicate with the central hole therein, a supporting shaft secured to the fixing seat and comprising a cylindrical rod one end extent of which is threaded to enable attachment to the fixing seat by means of an associated nut or stud, a through hole extending transversely through the other end extent of the cylindrical rod and of diameter the same as that of the pivotal hole through the one end of the handle control the other end extent of the cylindrical rod being received within the axial through hole in the one end extent of the handle with the pivotal hole in the handle and the through hole in the cylindrical rod being axially aligned, a cylindrical control shaft having opposed end extents which are closely received within, to be rotatable in, the opposed end extents of the pivotal hole in the handle, the control shaft including a reduced diameter eccentric section between the end extents which contacts the wall of the through hole in the cylindrical rod, and a movable piece of generally U-shape in transverse section pivotally mounted on the handle and having opposed pivotal holes therein adapted to co-operate with the opposed and extents of the control shaft whereby pivoting movement of the movable piece on the handle rotates the control shaft, the arrangement being such that, with the movable piece in a first angular position, the teeth on the protruded umbrella shaped portion are tightly engaged with the teeth on the concave umbrella shaped portion to prevent rotation of the handle relative to the fixing seat, and with the movable piece in a second angular position, the eccentric section of the control shaft moves the handle axially relative to the fixing seat whereby the teeth on the protruded umbrella shaped portion and the teeth on the concave umbrella shaped portion are released to permit pivoting of the handle relative to the fixing seat. The invention, as well as its many advantages, may be further understood by the following detailed description and drawings in which: Fig. 1 is a perspective view of the present invention. Fig. 2 is a schematic cross sectional view howing the action of the present invention. Fig. 3 is a schematic cross sectional view of the present invention. Fig. 4 is a schematic cross sectional view of another embodiment according to the present invention. Fig. 5 is a schematic view showing the engaging state of the present invention. Fig. 6 is an exploded perspective view of the U shape handle of the present invention. Fig. 7 is a lateral view showing that the present invention is applied to a waxing machine. Fig. 8 is an upper view showing that the present invention is applied to a waxing machine. As shown in Fig. 1, the pivotal device of a handle according to the present invention includes a handle 1, a fixing seat 2, a supporting shaft 3, an eccentric shaft 4 and a movable piece 5, etc. The handle 1 is a rod shape handle, and the end portion thereof is formed with a protruded umbrella shape teeth portion 11. The teeth thereof have a triangular shape. An axial through hole 12 is formed at the center of the umbrella shape teeth portion 11. One side of the handle 1 has a pivotal hole 13 penetrating through the handle 1 so that the pivotal hole 13 is communicated with the through hole 12. A fixing seat 2 (as shown in Figs. 1 and 2) is a cylindrical base. A concave umbrella shape teeth portion 21 is formed in the center of the front surface thereof. The teeth of the umbrella shape teeth portion 21 have a triangular shape. The rear surface of the fixing seat 2 has a rectangular post 22. One side of the rectangular post 22 is installed with a pin hole 221 radially penetrated. A staged hole 23 is installed in the center of the fixing seat 2. The supporting shaft 3 is a cylindrical rod. One end thereof has a thread section the side of which is formed with a pin hole 311. The lateral surface of the cylindrical rod is a radial through hole 32. The diameter of the through hole 32 is identical to the pivotal hole 13 of the handle 1. The eccentric shaft 4 is a cylindrical shaft 41, and an eccentric section 42 with a smaller diameter is installed in the center thereof. The outer diameter of the eccentric shaft 42 is tangent to the cylindrical shaft 41 for forming an eccentric circular shaft. The movable piece 5 is a cambered piece so that the cross section thereof has a U shape. The distal ends on the two lateral walls of the movable pieces are installed with respective pivotal hole 51 so that the two pivotal holies are opposite to one another. By the aforementioned components (as shown in Fig. 1 and 3), the thread section 31 of the supporting shaft 3 is inserted into the staged hole 23 of the fixing seat 2 and is screwedly installed to the screw section 31 from the rear side of the fixing seat 2 by a nut 312. The supporting shaft 3 is firmly secured to the central portion of the fixing seat 2. Then, the front end of the supporting shaft 3 is inserted into the through hole 12 of the handle 1 so that the umbrella shape teeth portion 11 of the handle 1 are engaged with the umbrella shape teeth portion 21 of the fixing seat 2. Since the through hole 32 of the supporting shaft 3 is aligned to the pivotal hole 13 of the handle 1, the eccentric shaft 4 will pass through the pivotal hole 13 and the through hole 32. By the pivotal holes 51 of the movable pieces 5 at two ends of the cylindrical shaft 41 of the eccentric shaft 3 are pivotally connected to one side of the handle 1. However, since the eccentric section 42 of the eccentric shaft 4 is exactly positioned in the through hole 32 of the supporting shaft 3. Thus, it will eject against the wall of the through hole 32 with an angle. The two umbrella shape teeth portions 11 and 12 are engaged tightly, then the pivotal device of a handle is formed by assembling the aforementioned components If the handle 1 is in a state for rotatably adjusting the fixing angle. When the movable pieces 5 push away the handle 1 (as shown in Fig. 2), the eccentric shaft 4 is driven to rotate to a predetermined angle such that the distal end of the eccentric section 42 will eject against the front hole wall of the through hole 32. Thus, the handle 1 may be directly pushed away, and by the intermittent engagement of the umbrella shape teeth 11 of the triangular teeth (as shown in Fig. 5), the angle is adjusted In other words, although the two umbrella shape teeth portions 11 and 21 are engaged, the handle 1 can be rotated by the elasticity of the plastic. However, when the movable piece 5 is pushed back to a predetermined position (as shown in Fig. 3). the eccentric section 42 of the eccentric shaft 4 will eject against the front wall of the through hole 32 of the supporting shaft 3 so that the handle 1 can not be compressed due to elasticity and thus rotate. Therefore, it is fixed to a specific angle. Alternatively, by the pivotal device of a handle formed by assembling the aforementioned components, the orientation of the handle can be adjusted freely Moreover, the way for the supporting shaft 3 of the present invention to be firmly secured to the fixing seat 2 is not confined to the structure of the aforesaid thread section 31, as shown in Fig. 4. The distal end of the supporting shaft 3 may be installed with a screw hole 31'. Thereby, after the supporting shaft 3 is located within the center portion of the fixing seat 2. A stud 311' can be used to be screwedly locked into the screw hole 31' from the rear side of the fixing seat 2. Thus, the supporting shaft 3 and the fixing seat 2 are combined steadily. The pivotal device of a handle of the present invention can be installed at any products. As shown in Figs. 6 ∼ 8, the handle may be have a U shape, while two ends thereof are installed with correspondent umbrella shape teeth portions. Thus, the fixing seat 2 are firmly secured to the two sides of a waxing machine 10 by the rectangular post 22 thereof. Then, the two umbrella shape teeth portions of handle 1 are pivotally installed to the waxing machine 10. Therefore, as a user desires to operate the waxing machine, he (or she) may operate by holding the handle 1. However, since everyone has different habit in using and operating, thus he may adjust the handle to a preferred orientation, and then fix the handle 1 so that the user may operate the waxing machine in a comfortable way. Similarly, the embodiment of the present invention does not be confined to be used to a waxing machine. All products with handles are suitable to be used with the present invention, and by the pivotal device of a handle of the present invention, it can be adjusted freely.

Claims: A pivotal handle assembly comprising a handle (1) for attachment to an associated component, one end of the handle (1) having formed therein a protruded umbrella shaped portion (11) with a plurality of teeth on the surface thereof, an axial through hole (12) extending centrally from the umbrella shaped portion (11) through the one end extent of the handle (1), a pivotal hole (13) extending transversely through the one end of the handle (1) to communicate with the through hole (12), a fixing seat (2) of generally cylindrical shape for attachment to the component and having a front surface remote from the component on which is formed a concave umbrella shaped portion (21) with a plurality of teeth on the surface thereof, a rectangular post (22) extending from the rear surface of the fixing seat and having a central hole (23) therein, a supporting shaft (3) secured to the fixing seat (2) and comprising a cylindrical rod one end extent of which is threaded (31,31 1 ) to enable attachment to the fixing seat (2) by means of an associated nut (312) or stud (311 1 ), a through hole (32) extending transversely through the other end extent of the cylindrical rod and of diameter the same as that of the pivotal hole (13) through the one end of the handle (1), the other end extent of the cylindrical rod being received within the axial through hole (12) in the one end extent of the handle (1) with the pivotal hole (13) in the handle (1) and the through hole (32) in the cylindrical rod being axially aligned, a cylindrical control shaft (4) having opposed end extents (41) which are closely received within, to be rotatable in, the opposed end extents of the pivotal hole (13) in the handle (1), the control shaft (4) including a reduced diameter eccentric section (42) between the end extents (41) which contacts the wall of the through hole (32) in the cylindrical rod, and a movable piece (5) of generally U-shape in transverse section pivotally mounted on the handle (1) and having opposed pivotal holes (51) therein adapted to co-operate with the opposed end extents (41) of the control shaft (4) whereby pivoting movement of the movable piece (5) on the handle (1) rotates the control shaft (4), the arrangement being such that, with the movable piece (5) in a first angular position, the teeth on the protruded umbrella shaped portion (11) are tightly engaged with the teeth on the concave umbrella shaped portion (21) to prevent rotation of the handle (1) relative to the fixing seat (2), and, with the movable piece (5) in a second angular position, the eccentric section (42) of the control shaft (4) moves the handle (1) axially relative to the fixing seat (2) whereby the teeth on the protruded umbrella shaped portion (11) and the teeth on the concave umbrella shaped portion (21) are released to permit pivoting of the handle (1) relative to the fixing seat (2). An assembly as claimed in claim 1 wherein the teeth of the protruded umbrella shaped portion (11) on the one end of the handle (1) and the teeth on the concave umbrella shaped portion (21) on the front surface of the fixing seat (2) each have a triangular shape. An assembly as claimed in claim 1 or claim 2 wherein the end extent of the cylindrical rod is externally threaded (31) and is inserted through the central hole (23) in the fixing seat (2), a nut (312) securing the supporting shaft (3) to the fixing seat (2). An assembly as claimed in claim 1 or claim 2 wherein the one end extent of the cylindrical rod is internally threaded (31 1 ), a stud (311 1 ) extending through the central hole (23) in the fixing seat (2) and into the internally threaded extent of the cylindrical rod to secure the supporting shaft (3) to the fixing seat (2).

Inventors: HUNG MICHAEL, HUNG, MICHAEL
Applicants: MVP H K IND LTD, MVP (H.K.) INDUSTRIES LIMITED
Application year: 1999
Main classification: B25F5
IPC codes: B25F5, G05G1