WO2009102260A1 - Telescopic lock - Google Patents
Telescopic lock Download PDFInfo
- Publication number
- WO2009102260A1 WO2009102260A1 PCT/SE2009/000089 SE2009000089W WO2009102260A1 WO 2009102260 A1 WO2009102260 A1 WO 2009102260A1 SE 2009000089 W SE2009000089 W SE 2009000089W WO 2009102260 A1 WO2009102260 A1 WO 2009102260A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- locking
- wedge
- inner tube
- outer tube
- drive member
- Prior art date
Links
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- 239000004411 aluminium Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
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- 229910000831 Steel Inorganic materials 0.000 description 1
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
- F16B7/10—Telescoping systems
- F16B7/14—Telescoping systems locking in intermediate non-discrete positions
- F16B7/1463—Telescoping systems locking in intermediate non-discrete positions with the expansion of an element inside the outer telescoping member due to the axial movement towards a wedge or a conical member
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T403/00—Joints and connections
- Y10T403/32—Articulated members
- Y10T403/32254—Lockable at fixed position
- Y10T403/32467—Telescoping members
- Y10T403/32475—Telescoping members having detent
- Y10T403/32491—Threaded
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T403/00—Joints and connections
- Y10T403/32—Articulated members
- Y10T403/32254—Lockable at fixed position
- Y10T403/32467—Telescoping members
- Y10T403/32516—Remotely actuated
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T403/00—Joints and connections
- Y10T403/70—Interfitted members
- Y10T403/7062—Clamped members
- Y10T403/7064—Clamped members by wedge or cam
- Y10T403/7066—Clamped members by wedge or cam having actuator
- Y10T403/7067—Threaded actuator
- Y10T403/7069—Axially oriented
Definitions
- the invention is a locking device that includes an inner element and an outer tube, the inner element having a first free end that projects from and is axially displaceable from a first end of the outer tube, there being a locking member on the other end of the inner element, said locking member serving to releasably lock the inner element and the outer tube in various axial positions relative to each other.
- a large number of various locking devices for releasably locking an inner element to an outer tube in various axial positions relative to each other are already known. In principle, these are used in two different areas. These are: stands and supports for taking up principally axial forces; and, tool shafts for taking up not only axial and lateral forces, but also torque. Examples from the first category include furniture legs, various types of sticks, microphone stands, camera stands, ski poles, etc. Examples from the second include shafts for gardening, painting shafts, cleaning shafts, etc.
- Shape-dependent locks have fixed positions that can be created using holes or transverse slots into which corresponding locking pins can be inserted - see, for example, GB1532723 or WO2005/087329.
- This type of lock has few parts and may provide a reliable locking function.
- friction- dependent locks these have the advantage of offering freely selectable locking positions, but the disadvantage that it is more difficult to achieve a reliable locking function using this type of lock.
- WO2004/090349 can here be mentioned.
- a further division can be made on the basis of the locking member's location in relation to the most common main structures, i.e. an outer tube and a therein displaceable inner tube.
- the locking member can here be: 1) on the end of the inner tube that is inserted in the outer tube - working against the outer tube's inner mantle surface, or 2) on the outer tube's end - working against the inner tube's outer mantle surface, or 3) on the end of an internal tube that is joined to an outer tube inserted into the inner tube - working against the inner mantle surface - see, for example, WO2005/108015.
- Another known operating principle for a locking member located on one end of the inner tube is to use a non-circular torsion rod that emerges from the outer tube's free end.
- the locking member has a through-hole for the torsion rod and can thus be displaced axially relative to this.
- the locking member can be actuated by turning the torsion rod via a rotary knob on the outer tube's free end.
- US2006/0282988, US6361002, US6862776 and GB2423275 can here be mentioned amongst the more recent documents. All the devices described in these documents use locking bodies that, acted on by the rotary movement, are pressed in a radial direction against the outer tube's inner mantle surface.
- the locking device described in WO2005/000305 suffers from disadvantages in the form of an extra inner tube and complicated assembly. It can also be mentioned that the lock is of the disconnection type. Of course, this is excellent as regards operation but, for it to take up a spontaneously locked position, requires the engagement of a spring. A further disadvantage is that the operating member does not have full control over the lock - it cannot be disconnected when the shaft is axially loaded.
- the purpose of the present invention is that it should result in a device as set out in the ingress, said device giving a reliable and easy-to-operate locking function while also enabling manufacture at a substantially lower cost than that of already known variants.
- a further purpose is that it should result in a device as set out in the ingress, said device, via the operating member, giving full control of locking.
- the locking member includes a tubular locking sleeve slotted by an axially aligned slot that has a wedge-shaped cut-out with essentially tangentially aligned wedge surfaces facing each other and a wedge with wedge surfaces, said wedge surfaces, when acted on by a "drive member”, being displaceable along and relative to the locking sleeve's interacting wedge surfaces, said displacement pressing the locking sleeve against the outer tube and thereby axially locking the inner element and the outer tube relative to each other, the displacement being effected by rotating the drive member around an axis that is essentially parallel with the outer tube's longitudinal axis.
- Fig. 1 shows, in perspective, a tool shaft with a locking device as per the invention.
- Fig. 2 shows a cross section of an outer tube.
- Fig. 3 is a side view showing a handle for the tool shaft in fig. 1.
- Fig. 4 is a view, from above, of the handle in fig. 3.
- Fig. 5 shows a cut-away of the handle (section A-A) in fig. 3.
- Fig. 6 is a view, from below, of an operating member for the tool shaft in fig. 1.
- Fig. 7 is a side view of the operating member in fig. 6.
- Fig. 8 shows the operating member in fig. 7 in perspective, obliquely from below.
- Fig. 9 is a side view of a handle as per fig. 3 with, mounted therein, an operating member as per fig. 7 with a torsion rod connected to the operating member, said torsion rod being truncated in the figure.
- Fig. 10 shows a cut-away of the arrangement (section A-A) in fig. 9.
- Fig. 11 is a side view showing a wedge member.
- Fig. 12 is a view, from below, of the wedge member in fig. 11.
- Fig. 13 shows a cut-away of the wedge member (section A-A) in fig. 11.
- Fig. 14 shows the wedge member in fig. 11 in perspective, obliquely from above.
- Fig. 15 is a side view showing a locking sleeve slotted with an axially aligned wedge-shaped slot.
- Fig. 16 is a view, from the left, showing the locking sleeve in fig. 15.
- Fig. 17 shows the locking sleeve in fig. 15 in perspective, obliquely from the left.
- Fig. 18 is a side view of a drive member that includes a thread.
- Fig. 19 shows a cut-away of the drive member (section B-B) in fig. 18.
- Fig. 20 is a view, from the right, of the drive member in fig. 18.
- Fig. 21 shows the drive member in fig. 18 in perspective, obliquely from the left.
- Fig. 22 is a side view of a locking member, as per the invention, partly mounted and with a truncated torsion rod.
- Fig. 23 is a view, from the left, of the locking member in fig. 22.
- Fig. 24 shows the locking member in fig. 22 in perspective, obliquely from above.
- Fig. 25 shows the locking member in fig. 22 in perspective, obliquely from below.
- Fig. 26 is a side view showing parts of the locking member, a truncated torsion rod, a truncated inner tube and a partly exposed and truncated outer tube.
- Fig. 27 is a partly exposed side view showing interacting internal parts of the locking member.
- Fig. 28 is a partial enlargement of the exposed detail in fig. 27.
- Fig. 29 is a view, from below, of an alternative design of an operating member.
- Fig. 30 is a side view, from the left, of the operating member in fig. 29.
- Fig. 31 shows the operating member in fig. 29 in perspective, obliquely from below.
- Fig. 32 is an exposed side view of an alternative design of a handle.
- Fig. 33 is a view, from above, of the handle in fig. 32.
- Fig. 34 is a partly exposed side view of a handle as per fig. 32 with, mounted therein, an operating member as per fig. 29 with a torsion rod connected to the operating member, said torsion rod being truncated in the figure.
- Fig. 35 is a side view of an alternative design of a drive member.
- Fig. 36 is a view, from above, of the drive member in fig. 35.
- Fig. 37 shows the drive member in fig. 35 in perspective, obliquely from above.
- Fig. 38 shows, in perspective obliquely from below, a wedge member that mates up with the drive member in fig. 35.
- Fig. 39 is a side view of the wedge member in fig. 38.
- Fig. 40 shows the wedge member in fig. 38 in perspective, obliquely from below, at a different angle.
- Fig. 41 is a view, from above, of the wedge member in fig. 39.
- Fig. 42 is a side view of a locking sleeve that mates up with the wedge member in fig. 38.
- Fig. 43 is a view, from below, of a locking sleeve as per fig. 42.
- Fig. 44 shows the locking sleeve in fig. 42 in perspective, obliquely from above.
- Fig. 45 shows, mounted, a locking member as per figs. 35, 38 and 42 with a mounted inner tube and an outer tube, all in perspective, obliquely from the side.
- Fig. 46 shows, in perspective from the side, an arrangement as per fig. 45 with the outer tube partly fitted and the locking member in a locked position.
- Fig. 47 is a side view of a variant of a mounted locking member as per the invention.
- Fig. 48 is a view, from the left, of the locking member in fig. 47.
- Fig. 49 shows the locking member in fig. 47 in perspective, obliquely from above.
- Fig. 50 is a view, from below, of a handle with an operating member and torsion rod.
- Fig. 51 is a side view of the handle in fig. 50.
- Fig. 52 is a view, from the left, of the handle in fig. 51.
- Fig. 53 is an exposed view, from the left, of the handle in fig. 52.
- Fig. 1 shows a locking device as per the invention used with a tool shaft (10) that includes an outer tube (3), an inner element (1), a stop bushing (17), a locking member (4), a torsion rod (7), a handle (6) and an operating member (5).
- the inner element (1) is, in this case, an inner tube and includes, in this design, a tool mount (2) at its lower free end, said tool mount comprising, in its simplest form, radially aligned holes.
- the handle (6) is fastened to the upper part of the outer tube (3).
- the operating member (5) is arranged in a way that allows it to rotate.
- the torsion rod (7) is fastened to the operating member (5) and thus rotates when the operating member (5) is turned. Such turning acts upon the locking member (4), which is more closely described below.
- Fig. 2 shows a cross section of the outer tube (3).
- the outer tube should be made of extruded aluminium, but an outer tube made of a different material and in a different way can also be envisaged, e.g. a steel tube with shoulders pressed inwards from the outside.
- shoulders (8) serve as an anti-rotation lock for the inner element (1).
- Such an anti-rotation lock can, of course, be in the form of another non-circular design of the outer tube's cross section. However, it is preferred that the cross section's inner mantle surface includes circular parts.
- the handle (6) in figs. 3 - 5 includes a neck (12) with axially aligned guide grooves (18) designed to receive the shoulders (8) on the outer tube (3).
- the handle (6) further includes an axially aligned through-hole (20) that, in the handle's upper end develops into a cylindrical guide hole (19) via a ring-shaped, axially aligned, stop surface (21).
- the handle (6) can appropriately be manufactured from an injection moulded polymer and provided with cut-ins (22).
- the guide hole (19) is designed to receive a cylindrical neck (24) on an operating member (5). As shown in figs. 6 - 8, this operating member (5) can appropriately be manufactured as a single part (injection moulded polymer).
- the operating member (5) with the torsion rod (7) fitted can be secured axially to the handle (6) - as shown in figs. 9 and 10. Owing to a certain axial and radial play between the operating member (5) and the handle (6), the operating member (5) and, consequently, the torsion rod (7) can be rotated in the arrows' M directions relative to the handle (6).
- Figs. 9 and 10 also show parts of an outer tube that has been fitted onto the neck (12) of the handle (6).
- Figs. 11 - 21 show the constituent parts of the locking member (4).
- a wedge member (30) as per figs. 11 - 14 can appropriately be made as a single part (an injection moulded polymer - e.g. polyamide).
- the wedge member (30) is essentially tubular and includes: a mounting neck (33) designed to be inserted into and fastened to the inner element (1); a guide pin (32); and, between the mounting neck and the guide pin, a stop flange (34), which serves as a stop for the inner element (1).
- the outer mantle surface of the guide pin (32) includes a projection in the form of a wedge (14) with a guide groove (31).
- the wedge (14) has two wedge surfaces (15) that are essentially tangentially aligned and face away from each other at a certain angle.
- the wedge member (30) also includes a through-hole (36) that, in the guide pin (32), has an internal thread (35).
- the locking member (4) also includes a tubular, essentially cylindrical locking sleeve (9) that is slotted with an axially aligned slot (13) - as per figs. 15 - 17. A one of its ends, this slot (13) develops into a wedge-shaped cut-out (113) with wedge surfaces (16) that face each other and are essentially tangentially aligned.
- the locking sleeve includes a section, with a larger outside diameter, that forms a locking surface (37). It also has a section, with a slightly smaller diameter, that forms a neck (38). There is an axially aligned slot (13 ' ) in the locking surface (37) on the opposite side of slot 13.
- the inside diameter of the locking sleeve forms a guide surface (39) designed to interact with the guide pin (32) of the wedge member (30).
- the locking sleeve (9) also includes shoulders (40) that run from the outer end of the neck (38) and are radially aligned in towards the centre. The end edges of the shoulders (40) are essentially circular and have a certain diameter, "d”.
- the locking sleeve is preferably manufactured as a single part in an appropriate material, e.g. acetal plastic. The material should be flexible but keep its shape and have a low friction coefficient when interacting with the wedge member (30).
- the locking member (4) also includes a drive member (41), as per figs. 18 - 21.
- Said drive member is preferably manufactured as a polymer (e.g. polyamide) that is injection moulded.
- the drive member (41) includes a cylindrical neck (49). On said neck, there is an external thread in the form of a thread groove (42). With a certain radial and axial play, the external thread mates up with the internal thread (35) of the wedge member (30).
- the thread groove (42) runs from the end of the neck (49) and terminates with an axially aligned edge (48). At a distance from the edge (48), the neck (49) has a reduction in diameter that forms a slot (43) with a lower stop surface (44) and an upper stop surface (46), said stop surfaces being ring-shaped and essentially axially aligned.
- the outside diameter of the slot (43) is somewhat less than the diameter ("d") of the end edges of the shoulders (40) of the locking sleeve (9).
- the upper stop surface (46) forms an end surface of a flange (45) that has an outside diameter that is approximately the same as the outside diameter of the neck (38) of the locking sleeve (9).
- the drive member (41) further includes a through-hole (47) with a cross section (in this case, hexagonal) that is the same shape as that of the torsion rod (7), but which is slightly larger. This is so that the torsion rod (7) can run freely through the hole (47) and still turn the drive member.
- the important thing here is that the cross section is not circular. A rotary movement can thus be transmitted from the torsion rod (7) to the drive member (41), such movement thereby actuating a locking device. This actuation is explained more closely below.
- FIGs 22 - 25 show the locking member (4) partly fitted with a torsion rod (7) that has been inserted therein.
- the assembly order is as follows.
- the shoulders (40) on the locking sleeve (9) are turned towards the end of the neck (49) of the drive member (41), pulled over the neck and snapped securely in place in the slot (43).
- the width of the slot (43) is such that, with a certain axial play, the shoulders (40) fit into the slot.
- the torsion rod (7) can then be pushed into the hole (47) in the drive member (41). In this hole, the torsion rod (7) can then be displaced axially with a certain play (as previously explained).
- the torsion rod is also inserted through the through-hole (36) of the wedge member (30). In this hole, the torsion rod can be freely rotated and axially displaced.
- the wedge member (30) is then turned so that the guide pin (32) faces the locking sleeve (9) and the drive member (41).
- the drive member (41) is screwed into the wedge member (30) whereby, with a certain play, the guide surface (39) of the locking sleeve (9) slides against the guide pin (32) of the wedge member (30).
- Figures 26 - 28 show the locking member in an unlocked position and fully fitted.
- a section of the outer tube (3) is exposed.
- the inner tube (1) is fitted to the mounting neck (33) of the wedge member (30). Thanks to a gap (50) between the locking surface (37) of the locking sleeve (9) and the inner mantle surface (11) of the outer tube (3), the inner tube (1) with the fitted locking member (4) can be displaced axially relative to the outer tube (3).
- the outer tube's shoulders (8) slide in the guide groove (31) of the wedge member (30) and in the axially aligned slots (13 and 13 ' ) of the locking sleeve (9).
- Fig. 26 shows the wedge (14) of the wedge member (30) partly pushed into the wedge-shaped cut-out (113) of the locking sleeve (9).
- Turning the torsion rod (7) in the arrow's O direction screws the drive member (41) into the wedge member (30).
- the upper flank (52) of the thread groove (42) of the drive member (41) is supported against the lower flank (51) of the thread (35) of the wedge member (30) - fig. 28.
- Axial play between the thread groove (42) and the thread (35) gives rise to the formation of a gap, A, between the lower flank of the thread groove (42) and the upper flank of the thread (35).
- the flange (45) presses that end of the locking sleeve (9) which has the shoulders (40) in the arrow's Q direction - fig. 27.
- the wedge (14) of the wedge member (30) is thereby pushed further into the wedge-shaped cut-out (113) of the locking sleeve (9). Consequently, the wedge surfaces (15) of the wedge (14) move along and relative to interacting wedge surfaces (16) on the locking sleeve (9).
- Gap A can then be less than 1 mm, this low value being important to achieve operation that is as controllable as possible.
- a small gap height for A is conditional on active locking components being rigid and having little springiness. This is because, with a wedge angle of 20 degrees, a 1 mm displacement of the wedge (14) entails only an approximately 0.1 mm diameter increase of the locking sleeve (9).
- the described device/arrangement comprises few parts and is simple to assemble. This leads to low production costs.
- the torsion rod (7) is a hexagonal rod. It can, of course, have a different non-circular cross section that requires less material. For example, an aluminium profile in the form of a thin-walled pipe with outward pointing shoulders could be imagined. A profile in a reinforced polymer is another possibility.
- a design without anti-rotation locking of the wedge member (30) and where the outer tube (3) has a circular cross section can also be imagined. As the torque when the drive member (41) screws into the wedge member (30) is low, friction or the inertia that arises when a tool is connected to the tool mount (2) is often enough to give the counter torque necessary for operation.
- the thread is not self-locking and it is then preferred that the operating member includes a catch device as per figs. 29 - 34.
- the operating member (5) is here appropriately manufactured as a single part (injection moulded polymer) and includes, as per figs. 29 - 31 , a relatively thin cylindrical disc (58) slotted with radial slots (56) through which tongues (55) on the disc (58) protrude.
- a neck (24) is fitted on one side of the disc (58), and concentric therewith. This has exactly the same design and function as the neck (24) previously described in connection with figs. 6 - 8.
- a knob (59) This is symmetrically stretched across a diameter line on the disc (58).
- the knob includes radially aligned cavities (60) and is oriented so that the cavities (60) lie above and cover the tongues (55) and the slots (56).
- the tongues (55) can thus be freely bent into the cavities (60).
- the tongues (55) include projections (57). These have a triangular cross section and extend radially from the flange (61) out towards the circumference of the disc (58).
- the neck (24) also includes a radially aligned hole (54) for a pin or a screw designed to fasten the torsion rod (7) in an axial direction.
- the handle (6) is appropriately manufactured as a single part (injection moulded polymer) and includes, as per figs. 32 and 33, a neck (12) and a head (66).
- the handle (6) further includes guide grooves (18), a through-hole (20), a guide hole (19) and a stop surface (21). The design and function of these is as previously described in connection with figs. 3 - 5.
- the outer part of this recess is cylindrical with a diameter that is slightly larger than that of the disc (58) on the operating member (5).
- the cylindrical part of the recess (62) is concentric with the guide hole (19). At its lower part, the recess (62) develops into a rotationally symmetric cut-in (22).
- a tube (67) rises from the bottom of this cut-in (22).
- the inner mantle surface of this tube forms a part of the guide hole (19); its upper end surface (64) is designed to support the lower end surface of the flange (61) of the operating member (5).
- the teeth here have a triangular cross section and are designed to interact with the projections (57) on the tongues (55) of the operating member (5).
- Fig. 34 shows how the handle (6) and the operating member (5) interact in a catch device (65).
- the torsion rod (7) is fitted in the operating member (5) in the same way as previously described.
- the torsion rod (7) is then inserted through the handle's guide hole (19), after which, as previously described, the neck (24) of the operating member (5) snaps securely into place against the stop surface (21). In this position, the operating member (5) is locked axially with a certain play between the stop surface (21) and the support surface (64). This play is so adapted that the projections (57) fit into the spaces between the teeth in the tooth rim (63) and thus, with a certain braking moment, lock the operating member (5) from turning relative to the handle (6). In the locking member, it is thus possible to use a thread that is not self-locking and thereby achieve a very easy to operate locking function. When turning the knob (69) in any of the arrows' O and P directions with a greater torque than the braking moment, the projections (57) slide over the teeth in the tooth rim (63) thanks to the triangular cross sections.
- a catch device (65) can, of course, have a large number of different designs. It can, for example, be friction-dependent or designed to have a catch that is to be actively actuated at disconnection. To ensure that the projections (57) are pressed down towards the tooth rim (63) with appropriate force, it is also possible to envisage the engagement of separate, metal, spring elements.
- the operating member (5) is recessed in the recess (62) of the handle (6).
- the operator can easily get at the operating member (5) and, without risking involuntary actuation of the operating member, can manipulate the shaft (10) using the handle (6).
- many other locations and designs of the operating member can, of course, be envisaged.
- One advantageous arrangement could, for example, be to have the operating member (5) located on the outer end of the inner element (1) in a way that allows said member to rotate, the torsion rod (7) here not being displaced axially relative to the drive member (41) but being permanently fitted in this.
- Another possibility is for the operating member (5) to be so designed that it converts a linear movement of the operator's hand into a rotation of the torsion rod (7).
- the operating member include a toothed rack that operates against a gear on the torsion rod.
- the operating member can be pushed towards and away from the outer tube in a radial direction when operating the locking member.
- Another design is to provide: the upper part of the torsion rod (7) with a steeply pitched screw drive; and, the operating member (5) with a nut that has the same thread.
- the locking device can then be operated by the operating member being pressed in towards the outer tube in a radial direction.
- a compression spring can be used to achieve spring-back.
- the drive member (41) can be varied in such a way that its design has bendable tongues with locking shoulders in the end that is screwed into the wedge member.
- Said shoulders can hook securely onto the end edge of the through-hole (36) in the wedge member (30) and prevent the drive member (41 ) being entirely screwed out of the wedge member (30).
- the length of the tongues must be such that operation of the locking member (4) is not prevented.
- Figs. 35 - 44 show the constituent components of another design of a locking device, as per the invention, with a locking member (4).
- This locking member includes a drive member (41) as per figs. 35 - 37.
- Said member can appropriately be manufactured as a single part in an injection moulded polymer that has high rigidity and strength (e.g. a glass-reinforced polyamide).
- the drive member (41) which is as rotationally symmetric to the thread groove (42) as possible, has a through-hole (36) and, at one end, includes: a mounting neck (33) for fastening to an inner element (1); a flange (45) that demarcates, on one side, a stop surface for the inner element (1) and, on the other, a stop surface for a wedge member (30); and, a guide neck (70) that develops into a neck (49) with a diameter greater than that of the guide neck.
- the locking member (4) further includes a wedge member (30) as per figs. 38 - 41. Said wedge member can appropriately be manufactured as a single part (glass-reinforced polyamide).
- the wedge member (30) is designed as a cut-open cylindrical tube with a large and a small outside diameter. The section with the larger diameter forms a stop flange (34), the outer end of which is designed to give support against the flange (45) of the drive member (41). The section with the smaller outside diameter forms a guide pin (32) for guiding a locking sleeve (9).
- a wedge (14) On the mantle surface of the guide pin (32), there is a wedge (14) with essentially tangentially aligned wedge surfaces (15) at a certain angle (preferably around 20 degrees) from each other.
- the inner mantle surface of the wedge member (30) forms a guide surface (39) with a similar diameter to the outside diameter of the guide neck (70) of the drive member (41).
- the wedge member (30) is designed to snap-fit to the guide neck (70) between the flange (45) and the neck (49) with an axial and radial fit that allows it to be easily rotated on the guide neck.
- the locking member (4) also includes a locking sleeve (9) as per figs. 42 - 44.
- Said sleeve is preferably manufactured in acetal plastic, this material having good anti-friction properties against polyamide plastics.
- the locking sleeve (9) is designed as a cylindrical tube with a large outside diameter at one end and a small outside diameter at the other end. The large diameter end forms a locking surface (37) for interacting with the inner mantle surface of an outer tube (3). When the locking sleeve is not loaded, the diameter of the locking surface (37) is larger than the inside diameter of the outer tube (3). The other end forms a neck (38) with a smaller outside diameter.
- the inner mantle surface of the neck (38) has a thread (35) that is designed to interact with the thread groove (42) of the drive member (41), the fit being such that it can easily rotate with a certain axial play.
- the locking sleeve is slotted by an axially aligned slot (13) that, at the end with the locking surface (37), develops into a wedge-shaped cut-out (113) that has essentially tangentially aligned wedge surfaces (16) that face each other.
- the inside of the locking surface (37) of the locking sleeve (9) provides a guide surface designed to enclose the guide pin (32) on the wedge member (30), the fit being such that the locking sleeve can be easily displaced axially relative to the wedge member (30). Such displacement is accomplished via the drive member (41), which is more closely described below.
- Fig. 45 shows a fitted locking member (4) with an inner tube (1) fastened (using known technology) to the mounting neck (33) of the drive member (41).
- the wedge member (30) has been snapped onto the guide neck (70) of the drive member (41) and can be easily rotated on this.
- the locking sleeve (9) has also been fed over the penetrating bevel (71) of the drive member (41), the orientation being such that the wedge (14) of the wedge member (30) has been pushed into the wedge-shaped cut-out (113) of the locking sleeve (9) and then screwed into the thread groove (42). This penetration is accomplished through the widening of the locking sleeve.
- This locking is self-locking on displacement of the inner tube (1) relative to the outer tube (3) in the arrow's N direction. This is because the locking sleeve (9) then tends to be displaced in the arrow's Q direction relative to the wedge (14), with a further diameter increase as a consequence. This is possible because of the axial play in the thread.
- This locking principle has been previously explained in detail and an overview is given in fig. 46 where, for the sake of clarity, the outer tube (3) has only been partly slipped over the locking member (4). With an opposite displacement direction of the inner tube (1) relative to the outer tube (3), self-locking does not arise. However, a surprisingly strong locking function is achieved with only a small torque and the lock is, therefore, very easy to operate.
- the thread groove (42) and the thread (35) have a considerably smaller pitch than in the previously described design.
- the pitch should be so small that the thread is self-locking and, consequently, the locking member (4) does not open involuntarily.
- the locking member With a pitch of around 3 mm, the locking member can be operated between the fully open and the fully closed position with an angle of rotation of about 270 degrees and with so little torque that the operation is very easy to perform.
- This type of locking is especially appropriate in applications where no, or only a small, torque is to be transmitted between the inner element and the outer tube.
- Areas of use that can be envisaged include various types of sticks (e.g. walking sticks and ski poles) and various types of stands (e.g. for cameras and microphones). Boathooks are a further area of use.
- the lock contains only one part more than traditional and very common types of lock with the same operating principle. However, it gives a locking function that is vastly superior to theirs.
- the locking device is described in connection with an inner element (1) in the form of an inner tube.
- an inner element (1) in the form of a solid rod can, of course, employ an inner element (1) in the form of a solid rod.
- this design of the locking device can be provided with a handle and some type of tool or mount.
- the above- described design can also be varied so that the locking sleeve has no thread and, instead, the drive member interacts with a cylindrical nut of a slightly larger outside diameter than that of the outer tube, said nut being connected to the locking sleeve so that rotary and/or axial movements are transmitted.
- FIG. 47 shows various views of a locking member (4) where the drive member (41) has a thread groove (42) with such a small pitch that the thread is self-locking This brings the advantage that the operating member (5) does not require a catch device.
- Fig. 47 also shows how, at its narrowest end, the wedge (14) of the wedge member (30) has a stop member (72) in the form of two tangentially aligned bars. This stop member runs freely in a cut-out (53) in the locking sleeve (9). The cut-out (53) terminates in tangentially aligned edges (75) at the transition to the wedge surfaces (16).
- Figs. 50 - 53 show various views of a handle (6) with an operating member (5) and a torsion rod (7).
- the operating member (5) can be opened involuntarily when working with the shaft (10).
- the operating member (5) can be recessed in an opening in the handle (6) - as shown in figs. 50 - 53.
- the handle (6) includes a lower part, into which the outer tube (3) is designed to be introduced, and an upper part with an upper end piece (74) that includes a through-hole (20) into which the torsion rod (7) can be introduced and freely rotated.
- the through- hole (20) has a penetrating bevel (76) for the torsion rod (7).
- Two upward pointing bars (69) supporting a terminating cap (68) rise from the lower part of the handle (6).
- This cap (68) is thus integrated with the lower part of the handle (6).
- the cap (68) includes a base hole (72).
- Said base hole (72) serves as a guide hole for the torsion rod (7).
- the torsion rod can rotate freely therein. Between the bars (69), there is a cylinder-shaped, rotatable, operating member (5). As shown in fig. 53, this latter has cut-ins. In the centre of the operating member (5) there is a through-hole for the torsion rod (7). The torsion rod (7) can be introduced into this through-hole and locked against rotation and axial displacement relative to the operating member (5). On assembly, the operating member (5) is inserted between the bars (69) and then the torsion rod is inserted, from below, into the handle (6). Guided by the penetrating bevel (76), the torsion rod is then inserted into and through the through-hole (20) into the operating member (5).
- the torsion rod (7) is then inserted into the base hole (72) in the cap (68). Finally, using a radially aligned screw or some other known method, the torsion rod (7) can be secured to the operating member (5).
- the operating member (5) is now easy to get at for the operator without any risk of involuntary operation of the locking member (4). As the thread pitch in the locking member is considerably less than in earlier designs, a rotation of up to one turn is required between the closed and the open position. This is easily accomplished by two to three single turns between the operator's thumb and index finger. Insignificant torque only is required to achieve very strong locking of the inner tube (1) and the outer tube (3) relative to each other, both against axial movement (in both directions) and against rotation.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
- Prostheses (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
- Surgical Instruments (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2009213166A AU2009213166B2 (en) | 2008-02-16 | 2009-02-15 | Telescopic lock |
DK09709582.2T DK2255096T3 (en) | 2008-02-16 | 2009-02-15 | TELESCOPIC LOCK |
CN200980105359.2A CN101946098B (en) | 2008-02-16 | 2009-02-15 | Sleeve type lock |
US12/867,601 US8500357B2 (en) | 2008-02-16 | 2009-02-15 | Telescopic lock |
EP09709582.2A EP2255096B1 (en) | 2008-02-16 | 2009-02-15 | Telescopic lock |
CA2715768A CA2715768C (en) | 2008-02-16 | 2009-02-15 | Telescopic lock |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0800359-2 | 2008-02-16 | ||
SE0800359A SE532870C2 (en) | 2008-02-16 | 2008-02-16 | Locking means for telescopically arranged elements, including axially directed threads |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009102260A1 true WO2009102260A1 (en) | 2009-08-20 |
Family
ID=40957170
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE2009/000089 WO2009102260A1 (en) | 2008-02-16 | 2009-02-15 | Telescopic lock |
Country Status (9)
Country | Link |
---|---|
US (1) | US8500357B2 (en) |
EP (1) | EP2255096B1 (en) |
CN (1) | CN101946098B (en) |
AU (1) | AU2009213166B2 (en) |
CA (1) | CA2715768C (en) |
DK (1) | DK2255096T3 (en) |
RU (1) | RU2010138246A (en) |
SE (1) | SE532870C2 (en) |
WO (1) | WO2009102260A1 (en) |
Cited By (2)
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US8851094B2 (en) | 2010-03-29 | 2014-10-07 | Marufuji, Inc. | Cane |
WO2016122378A1 (en) * | 2015-01-31 | 2016-08-04 | Fast Ip Handelsbolag | Locking arrangement for telescopic devices |
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WO2009091929A2 (en) | 2008-01-15 | 2009-07-23 | Swift Distribution, Inc, | Musical support apparatus |
WO2010083333A1 (en) * | 2009-01-14 | 2010-07-22 | Swift Distribution, Inc. | Socket adapter and musical instrument cases |
EP2523614A4 (en) | 2010-01-15 | 2017-02-15 | Conventus Orthopaedics, Inc. | Rotary-rigid orthopaedic rod |
US8961518B2 (en) | 2010-01-20 | 2015-02-24 | Conventus Orthopaedics, Inc. | Apparatus and methods for bone access and cavity preparation |
CA2829193A1 (en) | 2010-03-08 | 2011-09-15 | Conventus Orthopaedics, Inc. | Apparatus and methods for securing a bone implant |
EP2819554B1 (en) * | 2012-02-27 | 2018-10-17 | Helen of Troy Limited | Infusion/dispersion device |
US8875724B2 (en) * | 2012-12-02 | 2014-11-04 | Jeremy Nootenboom | Mechanism for adjusting a telescoping member |
WO2015089357A2 (en) | 2013-12-12 | 2015-06-18 | Conventus Orthopaedics, Inc. | Tissue displacement tools and methods |
RU2566323C1 (en) * | 2014-07-14 | 2015-10-20 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Казанский национальный исследовательский технический университет им. А.Н. Туполева-КАИ" (КНИТУ-КАИ) | Spatial six-link mechanism with rotary kinematic pairs |
US9918669B2 (en) * | 2014-08-08 | 2018-03-20 | Medtronic Xomed, Inc. | Wireless nerve integrity monitoring systems and devices |
USD865483S1 (en) * | 2016-06-22 | 2019-11-05 | Anthony Smith, Sr. | Telescopic lock for sliding doors and windows |
WO2018035197A1 (en) | 2016-08-17 | 2018-02-22 | D & M Designs Llc | Collapsible telescoping pole |
US10918426B2 (en) | 2017-07-04 | 2021-02-16 | Conventus Orthopaedics, Inc. | Apparatus and methods for treatment of a bone |
CN107858873A (en) * | 2017-10-31 | 2018-03-30 | 天津银龙预应力材料股份有限公司 | A kind of durable type railroad sleeper |
US10844890B2 (en) * | 2017-11-16 | 2020-11-24 | Liberty Hardware Mfg. Corp. | Locking telescoping rod |
CN108692562B (en) * | 2018-07-22 | 2023-10-27 | 雷磊 | Self-locking mechanism of movable grain dryer |
US10995786B2 (en) * | 2018-08-21 | 2021-05-04 | Kaveh Didehvar | Tension rod mechanism |
US10954983B2 (en) | 2018-12-14 | 2021-03-23 | Raytheon Company | Weight-triggered locking feature |
US10959559B2 (en) | 2019-03-08 | 2021-03-30 | House of Atlas, LLC | Dual-mounted end cap system and locking system for an adjustable rod |
US11382447B2 (en) * | 2019-07-30 | 2022-07-12 | House of Atlas, LLC | Adjustable rod features |
US11825940B2 (en) | 2020-05-18 | 2023-11-28 | House of Atlas, LLC | Customizable shower caddy |
CN112682396B (en) * | 2020-12-29 | 2022-07-12 | 中北大学 | Hook type automatic butt joint device |
US20230180957A1 (en) * | 2021-12-14 | 2023-06-15 | Dongguan Shenghong Household Items Co., Ltd | Internal Locking Retractable Shower Curtain Rod and Connector |
US11974704B2 (en) | 2022-03-03 | 2024-05-07 | House Of Atlas Llc | Customizable shower caddy |
CN115045894B (en) * | 2022-08-16 | 2022-11-08 | 淄博朗达复合材料有限公司 | Ultra-light telescopic rod |
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KR100982703B1 (en) * | 2007-08-07 | 2010-09-17 | (주) 민성정밀 | Fixing device of sports stick with variable length |
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2008
- 2008-02-16 SE SE0800359A patent/SE532870C2/en not_active IP Right Cessation
-
2009
- 2009-02-15 RU RU2010138246/12A patent/RU2010138246A/en not_active Application Discontinuation
- 2009-02-15 DK DK09709582.2T patent/DK2255096T3/en active
- 2009-02-15 AU AU2009213166A patent/AU2009213166B2/en not_active Ceased
- 2009-02-15 CN CN200980105359.2A patent/CN101946098B/en active Active
- 2009-02-15 US US12/867,601 patent/US8500357B2/en active Active
- 2009-02-15 EP EP09709582.2A patent/EP2255096B1/en active Active
- 2009-02-15 CA CA2715768A patent/CA2715768C/en active Active
- 2009-02-15 WO PCT/SE2009/000089 patent/WO2009102260A1/en active Application Filing
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8851094B2 (en) | 2010-03-29 | 2014-10-07 | Marufuji, Inc. | Cane |
WO2016122378A1 (en) * | 2015-01-31 | 2016-08-04 | Fast Ip Handelsbolag | Locking arrangement for telescopic devices |
EP3250832A4 (en) * | 2015-01-31 | 2018-10-10 | FAST IP Handelsbolag | Locking arrangement for telescopic devices |
Also Published As
Publication number | Publication date |
---|---|
EP2255096A1 (en) | 2010-12-01 |
RU2010138246A (en) | 2012-03-27 |
CA2715768A1 (en) | 2009-08-20 |
SE532870C2 (en) | 2010-04-27 |
AU2009213166B2 (en) | 2012-09-20 |
DK2255096T3 (en) | 2019-01-02 |
AU2009213166A1 (en) | 2009-08-20 |
US8500357B2 (en) | 2013-08-06 |
EP2255096A4 (en) | 2017-06-21 |
SE0800359L (en) | 2009-08-17 |
CA2715768C (en) | 2015-06-23 |
US20110027012A1 (en) | 2011-02-03 |
CN101946098B (en) | 2014-01-08 |
CN101946098A (en) | 2011-01-12 |
EP2255096B1 (en) | 2018-08-29 |
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