EP1949812B1 - Positioning sleeve for a telescopic rod - Google Patents
Positioning sleeve for a telescopic rod Download PDFInfo
- Publication number
- EP1949812B1 EP1949812B1 EP07250184A EP07250184A EP1949812B1 EP 1949812 B1 EP1949812 B1 EP 1949812B1 EP 07250184 A EP07250184 A EP 07250184A EP 07250184 A EP07250184 A EP 07250184A EP 1949812 B1 EP1949812 B1 EP 1949812B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tube section
- positioning sleeve
- inner tube
- recessed parts
- surrounding portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Not-in-force
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45B—WALKING STICKS; UMBRELLAS; LADIES' OR LIKE FANS
- A45B9/00—Details
-
- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45B—WALKING STICKS; UMBRELLAS; LADIES' OR LIKE FANS
- A45B9/00—Details
- A45B2009/005—Shafts
- A45B2009/007—Shafts of adjustable length, e.g. telescopic shafts
Definitions
- the invention relates to a positioning sleeve, more particularly to a positioning sleeve for a telescopic rod.
- Figures 1 and 2 illustrate a hiking stick or cane incorporating conventional positioning sleeves 3.
- the hiking stick includes a handle 1, and a cane body 2 fixed to the handle 1.
- the cane body 2 includes a plurality of interconnected tube sections 201, and a conventional positioning sleeve 3 provided on each of two interconnected tube sections 201. Through telescopic connections of the tube sections 201, the cane body 2 can be extended to a desired length for use and can be shortened for storage.
- the purpose of the positioning sleeve 3, aside from enhancing an appearance of the connection between interconnected pairs of the tube sections 201, is to retard retraction of the interconnected tube sections 201 and to permit smooth telescopic movement thereof.
- the positioning sleeve 3 has an inner p ⁇ eripheral surface provided with a plurality of angularly spaced-apart anti-slip strips 301 projecting therefrom.
- the anti-slip strips 301 provide friction to an inner one of the tube sections 201 so as to retard the movement of the inner tube section 201 to a retracted position.
- the anti-slip strips 301 of the conventional positioning sleeve 3 can provide frictional positioning of the tube sections 201, the formation of the anti-slip strips 301 requires high accuracy so as to permit frictional fitting of the corresponding tube section 201. As such, a defective rate of the conventional positioning sleeve 3 is high. Further, the anti-slip strips 301 may wear due to frequent use, so that a retardation effect thereof is deteriorated.
- the object of the present invention is to provide a positioning sleeve for a telescopic rod that can be manufactured easily with a low defective rate and that provides for a good retardation effect, even after long use.
- US-A-3,083,041 discloses a locking device having the features of the pre-characterising portion of claim 1.
- a positioning sleeve is adapted to be applied to a telescopic rod, which has an outer tube section and an inner tube section connected telescopically to the outer tube section.
- the positioning sleeve comprises a sleeve body having a first surrounding portion adapted to surround the outer tube section, and a second surrounding portion adapted to surround the inner tube section.
- the second surrounding portion has an inner peripheral wall defining a through hole, a plurality of angularly spaced-apart recessed parts provided in the inner peripheral wall, and a plurality of compressible retaining units respectively disposed in the recessed parts and adapted to abut the inner tube section.
- Each of the retaining units is connected to one of the recessed parts, and has an engaging part projecting toward the through hole, and a deformable space defined between the engaging part and a respective one of the recessed parts.
- the deformable space is deformed when the inner tube section is friction-fitted into the sleeve body and when the engaging part of each retaining unit abuts the inner tube section.
- each of said retaining units further has two ends disposed at two opposite sides of said engaging part, said engaging part being a convex surface protruding toward said through hole between said two ends, at least one of said two ends ) being connected to the respective one of said recessed parts.
- the first preferred embodiment of a positioning sleeve 10 according to the present invention is adapted to be applied on a telescopic rod 200.
- the telescopic rod 200 has an axis (L) , and includes an outer tube section 210, and an inner tube section 220 connected telescopically to the outer tube section 210.
- the positioning sleeve 10 comprises a sleeve body having a first surrounding portion 121 adapted to surround the outer tube section 210, and a second surrounding portion 122 adapted to surround the inner tube section 220.
- the second surrounding portion 122 has an inner peripheral wall 1221 surrounding the axis (L) and defining a through hole 11, a plurality of angularly spaced-apart recessed parts 1222 formed in the inner peripheral wall 1221, and a plurality of compressible retaining units 13 respectively disposed in the recessed parts 1222 and adapted to abut the inner tube section 220.
- the first surrounding portion 121 has an inner peripheral wall 1211 with a diameter larger than a diameter of the inner peripheral wall 1221 of the second surrounding portion 122.
- the sleeve body further has a shoulder portion 123 formed between the inner peripheral walls 1211, 1221 of the first and second surrounding portions 121, 122.
- each of the retaining units 13 has two ends 131 that are opposite to each other in an angular direction and that are connected to the respective recessed part 1222, an engaging part 132 connected between the ends 131, and a deformable space 14 defined between the engaging part 132 and a respective one of the recessed parts 1222.
- the engaging part 132 is a convex surface protruding toward the through hole 11 between the two ends 131.
- the outer tube section 210 is inserted into the first surrounding portion 121 of the positioning sleeve 10 with a bottom end thereof abutting against the shoulder portion 123 so as to obtain an axial positioning.
- the inner tube section 220 is friction-fitted into the sleeve body with a top end thereof passing through the through hole 11 and into an inner portion of the outer tube section 210.
- the engaging parts 132 of the retaining units 13 abut against and are pressed by the inner tube section 220 so as to deform the deformable spaces 14 in the retaining units 13.
- the engaging parts 132 of the retaining units 13 compress radially and resiliently the inner tube section 220, and thereby produce a retarding effect.
- the length of the telescopic rod 200 is shortened, sliding movement of the inner tube section 220 with respect to the outer tube section 210 is retarded.
- the positioning sleeve 10 of the present invention not only can enhance the appearance of the interconnected outer and inner tube sections 210, 220, but also can provide frictional positioning of the inner tube section 220 through the presence of the retaining units 13. Even after frequent use, wear of the engaging parts 132 is limited, and if wear does occur, the deformable spaces 14 can automatically compensate for the wear. Further, high accuracy during formation of the retaining units 13 is not necessary so that the defect rate can be reduced. Additionally, the positioning sleeve 10 maintains spacing between the ends of the interconnected outer and inner tube sections 210, 220 when the inner tube section 220 is forced to retract into the outer tube section 210. Further, smooth sliding movement of the outer and inner tube sections 210, 220 relative to each other can be achieved.
- each of the retaining units 13' has a fixed end 131' connected to the respective recessed part 1222, a movable free end 133' that is spaced apart from the corresponding recessed part 1222 so that a slit 134' is formed therebetween, and an engaging part 132' connected between the fixed end 131' and the movable free end 133' .
- the advantages of the first preferred embodiment can be similarly achieved using the second preferred embodiment.
- each of the retaining units 13" has two ends 131" that are opposite to each other in an axial direction and that are connected to the respective recessed part 1222 (see Figure 4 ), and an engaging part 132" being a convex surface between the ends 131".
- the retaining units 13" are resilient, and thus can retard movement of the inner tube section 220 relative to the outer tube section 210.
- each of the retaining units 130 has a fixed end 140 connected to the respective recessed part 1222 (see Figure 4 ), a movable free end 150 that is spaced apart from the corresponding recessed part 1222 so that a slit 160 is formed therebetween, and an engaging part 170 connected between the fixed end 140 and the movable free end 150.
- the retaining units 130 are resilient. Hence, the advantages described in the aforementioned preferred embodiments can be similarly achieved using the fourth preferred embodiment.
Abstract
Description
- The invention relates to a positioning sleeve, more particularly to a positioning sleeve for a telescopic rod.
-
Figures 1 and2 illustrate a hiking stick or cane incorporatingconventional positioning sleeves 3. The hiking stick includes ahandle 1, and acane body 2 fixed to thehandle 1. Thecane body 2 includes a plurality of interconnectedtube sections 201, and aconventional positioning sleeve 3 provided on each of two interconnectedtube sections 201. Through telescopic connections of thetube sections 201, thecane body 2 can be extended to a desired length for use and can be shortened for storage. The purpose of thepositioning sleeve 3, aside from enhancing an appearance of the connection between interconnected pairs of thetube sections 201, is to retard retraction of the interconnectedtube sections 201 and to permit smooth telescopic movement thereof. Thepositioning sleeve 3 has an inner p<eripheral surface provided with a plurality of angularly spaced-apartanti-slip strips 301 projecting therefrom. Theanti-slip strips 301 provide friction to an inner one of thetube sections 201 so as to retard the movement of theinner tube section 201 to a retracted position. - Although the
anti-slip strips 301 of theconventional positioning sleeve 3 can provide frictional positioning of thetube sections 201, the formation of theanti-slip strips 301 requires high accuracy so as to permit frictional fitting of thecorresponding tube section 201. As such, a defective rate of theconventional positioning sleeve 3 is high. Further, theanti-slip strips 301 may wear due to frequent use, so that a retardation effect thereof is deteriorated. - Therefore, the object of the present invention is to provide a positioning sleeve for a telescopic rod that can be manufactured easily with a low defective rate and that provides for a good retardation effect, even after long use.
-
US-A-3,083,041 discloses a locking device having the features of the pre-characterising portion ofclaim 1. - According to this invention, a positioning sleeve is adapted to be applied to a telescopic rod, which has an outer tube section and an inner tube section connected telescopically to the outer tube section. The positioning sleeve comprises a sleeve body having a first surrounding portion adapted to surround the outer tube section, and a second surrounding portion adapted to surround the inner tube section. The second surrounding portion has an inner peripheral wall defining a through hole, a plurality of angularly spaced-apart recessed parts provided in the inner peripheral wall, and a plurality of compressible retaining units respectively disposed in the recessed parts and adapted to abut the inner tube section. Each of the retaining units is connected to one of the recessed parts, and has an engaging part projecting toward the through hole, and a deformable space defined between the engaging part and a respective one of the recessed parts. The deformable space is deformed when the inner tube section is friction-fitted into the sleeve body and when the engaging part of each retaining unit abuts the inner tube section. The invention is characterized in that each of said retaining units further has two ends disposed at two opposite sides of said engaging part, said engaging part being a convex surface protruding toward said through hole between said two ends, at least one of said two ends ) being connected to the respective one of said recessed parts.
- Other features and advantages of the present invention will become apparent in the following detailed description of the preferred embodiments with reference to the accompanying drawings, of which:
-
Figure 1 is a schematic view of a hiking stick or cane incorporating a conventional positioning sleeve; -
Figure 2 is a sectional view taken along line II-II ofFigure 1 ; -
Figure 3 is a fragmentary exploded sectional view of outer and inner tube sections of a telescopic rod incorporating a positioning sleeve according to the first preferred embodiment of the present invention; -
Figure 4 is a sectional view of the first preferred embodiment taken along line IV-IV ofFigure 3 ; -
Figure 5 is a perspective view of the first preferred embodiment; -
Figure 6 is a fragmentary assembled sectional view of the telescopic rod and the positioning sleeve of the first preferred embodiment; -
Figure 7 is an assembled sectional view of the inner tube section of the telescopic rod and the positioning sleeve of the first preferred embodiment taken along line VII-VII ofFigure 6 ; -
Figure 8 is a sectional view of a positioning sleeve according to the second preferred embodiment of the present invention; -
Figure 9 is a fragmentary exploded sectional view of outer and inner tube sections of a telescopic rod incorporating a positioning sleeve according to the third preferred embodiment of the present invention; -
Figure 10 is an assembled sectional view of the outer and inner tube sections of the telescopic rod and the positioning sleeve of the third preferred embodiment; and -
Figure 11 is a sectional view of a positioning sleeve according to the fourth preferred embodiment of the present invention, shown in a state sleeved on an outer tube section of a telescopic rod. - Before the present invention is described in greater detail, it should be noted that same reference numerals have been used to denote like elements throughout the specification.
- Referring to
Figures 3 to 7 , the first preferred embodiment of apositioning sleeve 10 according to the present invention is adapted to be applied on atelescopic rod 200. Thetelescopic rod 200 has an axis (L) , and includes anouter tube section 210, and aninner tube section 220 connected telescopically to theouter tube section 210. - The
positioning sleeve 10 comprises a sleeve body having a first surroundingportion 121 adapted to surround theouter tube section 210, and a second surroundingportion 122 adapted to surround theinner tube section 220. The second surroundingportion 122 has an innerperipheral wall 1221 surrounding the axis (L) and defining a throughhole 11, a plurality of angularly spaced-apart recessedparts 1222 formed in the innerperipheral wall 1221, and a plurality ofcompressible retaining units 13 respectively disposed in the recessedparts 1222 and adapted to abut theinner tube section 220. The first surroundingportion 121 has an innerperipheral wall 1211 with a diameter larger than a diameter of the innerperipheral wall 1221 of the second surroundingportion 122. The sleeve body further has ashoulder portion 123 formed between the innerperipheral walls portions - As best shown in
Figures 4 and 5 , each of theretaining units 13 has twoends 131 that are opposite to each other in an angular direction and that are connected to the respectiverecessed part 1222, anengaging part 132 connected between theends 131, and adeformable space 14 defined between theengaging part 132 and a respective one of therecessed parts 1222. Theengaging part 132 is a convex surface protruding toward thethrough hole 11 between the twoends 131. - With reference to
Figures 6 and7 , after thetelescopic rod 200 and thepositioning sleeve 10 are assembled, theouter tube section 210 is inserted into the first surroundingportion 121 of thepositioning sleeve 10 with a bottom end thereof abutting against theshoulder portion 123 so as to obtain an axial positioning. Theinner tube section 220 is friction-fitted into the sleeve body with a top end thereof passing through the throughhole 11 and into an inner portion of theouter tube section 210. At this time, theengaging parts 132 of theretaining units 13 abut against and are pressed by theinner tube section 220 so as to deform thedeformable spaces 14 in theretaining units 13. Because theretaining units 13 produce restoring forces when displaced in this manner, theengaging parts 132 of theretaining units 13 compress radially and resiliently theinner tube section 220, and thereby produce a retarding effect. Hence, when the length of thetelescopic rod 200 is shortened, sliding movement of theinner tube section 220 with respect to theouter tube section 210 is retarded. - Therefore, the positioning sleeve 10 of the present invention not only can enhance the appearance of the interconnected outer and
inner tube sections inner tube section 220 through the presence of theretaining units 13. Even after frequent use, wear of theengaging parts 132 is limited, and if wear does occur, thedeformable spaces 14 can automatically compensate for the wear. Further, high accuracy during formation of theretaining units 13 is not necessary so that the defect rate can be reduced. Additionally, thepositioning sleeve 10 maintains spacing between the ends of the interconnected outer andinner tube sections inner tube section 220 is forced to retract into theouter tube section 210. Further, smooth sliding movement of the outer andinner tube sections - Referring to
Figure 8 , a positioning sleeve 10' according to the second preferred embodiment of the present invention is shown to be similar to the first preferred embodiment. However, in this embodiment, each of the retaining units 13' has a fixed end 131' connected to the respectiverecessed part 1222, a movable free end 133' that is spaced apart from the correspondingrecessed part 1222 so that a slit 134' is formed therebetween, and an engaging part 132' connected between the fixed end 131' and the movable free end 133' . The advantages of the first preferred embodiment can be similarly achieved using the second preferred embodiment. - Referring to
Figures 9 and10 , apositioning sleeve 10" according to the third preferred embodiment of the present invention is shown to be similar to the first preferred embodiment. However, in this embodiment, each of theretaining units 13" has twoends 131" that are opposite to each other in an axial direction and that are connected to the respective recessed part 1222 (seeFigure 4 ), and anengaging part 132" being a convex surface between theends 131". Theretaining units 13" are resilient, and thus can retard movement of theinner tube section 220 relative to theouter tube section 210. - Referring to
Figure 11 , apositioning sleeve 100 according to the fourth preferred embodiment of the present invention is shown to be similar to the third preferred embodiment. However, in this embodiment, each of theretaining units 130 has a fixedend 140 connected to the respective recessed part 1222 (seeFigure 4 ), a movablefree end 150 that is spaced apart from the correspondingrecessed part 1222 so that aslit 160 is formed therebetween, and anengaging part 170 connected between the fixedend 140 and the movablefree end 150. Theretaining units 130 are resilient. Hence, the advantages described in the aforementioned preferred embodiments can be similarly achieved using the fourth preferred embodiment.
Claims (6)
- A positioning sleeve (10, 10', 10", 100) for a telescopic rod (200), which has an outer tube section (210) and an inner tube section (220) connected telescopically to the outer tube section (210), said positioning sleeve (10, 10', 10", 100) comprising:a sleeve body having a first surrounding portion (121) adapted to surround the outer tube section (210), and a second surrounding portion (122) adapted to surround the inner tube section (220), said second surrounding portion (122) having an inner peripheral wall (1221) defining a through hole (11);said second surrounding portion (122) further having a plurality of angularly spaced-apart recessed parts (1222) provided in said inner peripheral wall (1221), and a plurality of compressible retaining units (13, 13', 13", 130) respectively disposed in said recessed parts (1222) and adapted to abut the inner tube section (220), each of said retaining units (13, 13' , 13", 130) being connected to one of said recessed parts (1222) and having an engaging part (132, 132', 132", 170) projecting toward said through hole (11), and a deformable space (14) defined between said engaging part (132, 132' , 132"; 170) and a respective one of said recessed parts (1222), said deformable space (14) being deformed when the inner tube section (220) is friction-fitted into said sleeve body and when said engaging part (132, 132', 132", 170) of each of said retaining units (13, 13', 13", 130) abuts the inner tube section (220),characterized in that each of said retaining units (13, 13' , 13", 130) further has two ends (131, 131' , 133', 131", 140, 150) disposed at two opposite sides of said engaging part (132, 132', 132", 170), said engaging part (132, 132' , 132"', 170) being a convex surface protruding toward said through hole (11) between said two ends (131, 131', 133', 131", 140, 150), at least one of said two ends (131, 131', 133', 131", 140, 150) being connected to the respective one of said recessed parts (1222).
- The positioning sleeve (10, 10', 10", 100) of Claim 1, wherein said first surrounding portion (121) has an inner peripheral wall (1211) with a diameter larger than a diameter of said inner peripheral wall (1221) of said second surrounding portion (122), said sleeve body further including a shoulder portion (123) formed between said inner peripheral walls (1211, 1221) of said first and second surrounding portions (121, 3,22).
- The positioning sleeve (10, 10") of Claim 1, wherein both of said two ends (131, 131") of each of said retaining units (131, 131") are connected to the respective one of said recessed parts (1222).
- The positioning sleeve (10', 100) of Claim 1, wherein the other one of said two ends (131', 133' , 140, 150) is a movable free end (133' , 150) that is spaced apart from the respective one of said recessed parts (1222).
- The positioning sleeve (10) of Claim 1, wherein said two ends (131) of each of said retaining units (131) are opposite to each other in an angular direction.
- The positioning sleeve (10") of Claim 1, wherein said two ends (131") of each of said retaining units (131") are opposite to each other in an axial direction.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07250184A EP1949812B1 (en) | 2007-01-18 | 2007-01-18 | Positioning sleeve for a telescopic rod |
AT07250184T ATE515204T1 (en) | 2007-01-18 | 2007-01-18 | POSITIONING SLEEVE FOR A TELESCOPIC ROD |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07250184A EP1949812B1 (en) | 2007-01-18 | 2007-01-18 | Positioning sleeve for a telescopic rod |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1949812A1 EP1949812A1 (en) | 2008-07-30 |
EP1949812B1 true EP1949812B1 (en) | 2011-07-06 |
Family
ID=37903971
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07250184A Not-in-force EP1949812B1 (en) | 2007-01-18 | 2007-01-18 | Positioning sleeve for a telescopic rod |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1949812B1 (en) |
AT (1) | ATE515204T1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106163322A (en) * | 2014-04-11 | 2016-11-23 | 雷克体育公众有限公司 | There is the folding walking stick of pipe box cylinder |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL104751C (en) * | 1957-01-10 | |||
DE2941537C2 (en) * | 1979-10-13 | 1982-01-07 | Cullmann Handelsgesellschaft für Verbrauchsgüter mbH, 8506 Langenzenn | Telescopically adjustable support, especially for a camera tripod |
FR2651640B1 (en) * | 1989-09-08 | 1994-04-08 | Laurent Melin | REMOTE ADJUSTMENT SYSTEM FOR TELESCOPIC FISHING ROD WITH CONICAL ELEMENTS. |
-
2007
- 2007-01-18 AT AT07250184T patent/ATE515204T1/en not_active IP Right Cessation
- 2007-01-18 EP EP07250184A patent/EP1949812B1/en not_active Not-in-force
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106163322A (en) * | 2014-04-11 | 2016-11-23 | 雷克体育公众有限公司 | There is the folding walking stick of pipe box cylinder |
CN106163322B (en) * | 2014-04-11 | 2018-07-03 | 雷克体育公众有限公司 | Folding walking stick with pipe sleeve cylinder |
Also Published As
Publication number | Publication date |
---|---|
EP1949812A1 (en) | 2008-07-30 |
ATE515204T1 (en) | 2011-07-15 |
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