EP2572602B1 - Shaft structure of automatic umbrella - Google Patents

Shaft structure of automatic umbrella Download PDF

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Publication number
EP2572602B1
EP2572602B1 EP20110182677 EP11182677A EP2572602B1 EP 2572602 B1 EP2572602 B1 EP 2572602B1 EP 20110182677 EP20110182677 EP 20110182677 EP 11182677 A EP11182677 A EP 11182677A EP 2572602 B1 EP2572602 B1 EP 2572602B1
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EP
European Patent Office
Prior art keywords
shaft
runner
shaft assembly
fixed
umbrella
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.)
Active
Application number
EP20110182677
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German (de)
French (fr)
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EP2572602A1 (en
Inventor
Peter Su
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Individual
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Individual
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Publication of EP2572602A1 publication Critical patent/EP2572602A1/en
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Publication of EP2572602B1 publication Critical patent/EP2572602B1/en
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Classifications

    • AHUMAN NECESSITIES
    • A45HAND OR TRAVELLING ARTICLES
    • A45BWALKING STICKS; UMBRELLAS; LADIES' OR LIKE FANS
    • A45B19/00Special folding or telescoping of umbrellas
    • A45B19/04Special folding or telescoping of umbrellas with telescopic sticks
    • AHUMAN NECESSITIES
    • A45HAND OR TRAVELLING ARTICLES
    • A45BWALKING STICKS; UMBRELLAS; LADIES' OR LIKE FANS
    • A45B25/00Details of umbrellas
    • A45B25/14Devices for opening and for closing umbrellas
    • A45B25/143Devices for opening and for closing umbrellas automatic
    • AHUMAN NECESSITIES
    • A45HAND OR TRAVELLING ARTICLES
    • A45BWALKING STICKS; UMBRELLAS; LADIES' OR LIKE FANS
    • A45B19/00Special folding or telescoping of umbrellas
    • A45B19/10Special folding or telescoping of umbrellas with collapsible ribs

Definitions

  • the present invention generally relates to an improved structure of automatic umbrella, and more particularly to an improvement made on a shaft assembly of the automatic umbrella, so that the improved automatic umbrella allows of an easier and more efficient operation of a last stage of compressing and closing the umbrella thereby remarkably reducing the potential risk caused in compressing and closing the umbrella.
  • An early automatic umbrella comprises a control structure and operated in such a way as disclosed in US Patent No. 6,684,893B2 .
  • Such a known umbrella control structure is arranged inside a handle and comprises a hollow main body receiving therein a control ring.
  • a control bar is rotatably attached to the bottom of one side of the control ring.
  • a push button is arranged at one side of the main body and is exposed through a side opening of the handle. Expansion and collapse of the shaft of the umbrella is controlled through the above described arrangement.
  • Such an automatic umbrella shows a major drawback in the process of compressing and closing the umbrella, for closing umbrella requires an operation of compressing an expansion spring arranged inside the shaft of the umbrella.
  • the expansion spring has an overall length substantially corresponding to the total length of three sections of the shaft and this render the expansion spring an elongate elastic element that shows high strength and large spring force. Consequently, a user's hand must apply a great effort to compress and close the umbrella and must have this done in a single operation. Incaution or negligence in the application of force or compression often lead to accidental release of the expansion spring that springs the shaft back to cause damage of the hand or other body portion of the user.
  • the known automatic umbrella shows several shortcomings in practical use, which are briefly described as follows:
  • the known automatic umbrella is generally imperfect in respect of the structural arrangement thereof and may cause inconvenience and danger in operating the umbrella. Improvement is desired to overcome such problems.
  • an automatic umbrella comprising a handle and a shaft assembly, an operation and control unit being received in the handle and comprising a push button and a control ring, the control ring including a control bar and a projecting bar, and the shaft assembly comprising first, second and third shaft sections telescopically received in each other, a top cap fixed to the upper end of the third shaft section, a runner movably fitted over the shaft assembly, a bullet-like member arranged inside the shaft assembly, an expansion spring and a plurality of ribs coupled between the top cap and the runner, with each rib being acted upon by a collapse spring.
  • an automatic umbrella comprising a handle and a shaft assembly, an operation and control unit being received in the handle and comprising a push button and a control ring, the control ring including a control bar and a projecting bar, and the shaft assembly comprising first, second and third shaft sections telescopically received in each other, a top cap fixed to the upper end of the third shaft section, a runner movably fitted over the shaft assembly, a bullet-like member arranged inside the shaft assembly, an expansion spring and a plurality of ribs coupled between the top cap and the runner, with each rib being acted upon by a collapse spring, characterized in that the shaft assembly comprises an internal plug received and fixed inside a top portion of the second shaft section and an inner tube received in the second shaft section and having its top end fixed to the internal plug, the internal plug having a top end to which an end of a runner cable is attached, the runner cable having an opposite end extending upwardly and wrapping around a pulley fixed inside the top cap and
  • the operation tube having a bottom end that is fitted into and fixed to an operation plug in which a through hole and a fixing hole are formed, the inner tube having a top portion receiving and retaining therein a pin or pulley around which an operation cable is wrapped in such a way that an end of the operation cable extends through the through hole for attachment to the top of the bullet-like member and an opposite end of the operation cable is received and fixed in the fixing hole of the operation plug.
  • the umbrella according to the present invention generally comprises a handle (10), an operation and control unit (20), a shaft assembly (30), a runner (40), a top cap (41), a bullet-like member (50), an expansion spring (60), and a plurality of ribs (70) and collapse springs (71).
  • the operation and control unit (20) is arranged inside the handle (10) and comprises a hollow main body that receives therein a control ring (21) and a push button (22) that is arranged inside an opening defined in a sidewall of the handle (10) and exposed outside the handle.
  • the control ring (21) comprises a control bar (23) arranged at the bottom of one side thereof and the control ring (21) also comprises a projecting bar (24) arranged at an opposite side thereof for engaging and releasably retaining the runner (40) to hold the umbrella in a collapsed condition.
  • the shaft assembly (30) comprises a first shaft section (31), a second shaft section (32), and a third shaft section (33) that are telescopically received in each other.
  • the third shaft section (33) has a top end to which and the top cap (41) is fixed.
  • the second shaft section (32) has a top portion receiving and fixing therein an internal plug (35) that fixes an inner tube (34).
  • the first shaft section (31) of the shaft assembly (30) has a bottom end fixed to the main body of the operation and control unit (20).
  • the expansion spring (60) is received inside the first shaft section (31) and the second shaft section (32) of the shaft assembly (30).
  • Each of the ribs (70) is coupled between the runner (40) and the top cap (41).
  • FIGS. 2 , 4, and 5 feature the structure of the shaft assembly (30) of the umbrella, which is structured in such a way that an internal plug (35) is fixed to the top end of a second shaft section (32) and an inner tube (34) has a top end fixed to the internal plug (35).
  • the internal plug (35) has a top end to which an end of a runner cable (42) is attached.
  • An opposite end of the runner cable (42) extends upward and wraps around a pulley arranged inside the top cap (41) to extend outward for attaching to a top end of the runner (40).
  • the inner tube (34) receives therein an operation tube (36), and the operation tube (36) has a top end fixed to a bottom of the top cap (41).
  • the operation tube (36) has a bottom end that is fit into and fixed to an operation plug (38) in which a through hole (381) and a fixing hole (382) are formed.
  • the inner tube (34) has a top portion receiving and retaining therein a pulley (37) around which an operation cable (39) wraps in such a way that an end of the operation cable (39) extends through the through hole (381) to attach to a top of the bullet-like member (50) and an opposite end is received and fixed in the fixing hole (382) to thereby attach to the operation plug (38).
  • the automatic umbrella is shown in a condition of being compressed and ready to use.
  • the expansion spring (60) contained in the shaft assembly (30) is depressed by the internal plug (35) of the second shaft section (32) and shows a compressed condition.
  • the runner (40) is caught and retained in position by the projecting bar (24) of the control ring (21).
  • the control bar (23) is depressed downward by the shaft assembly (30) to show an inclined condition.
  • the bullet-like member (50) is depressed by the inner tube (34) and biased by the spring plate (311) to engage and thus retain in a retention hole formed in the first shaft section (31).
  • the push button (22) is pressed down and the control ring (21) is thus pushed inward to separate the projecting bar (24) from the runner (40), whereby the spring force of the expansion spring (60) contained in the shaft assembly (30) forcibly drives the second shaft section (32) upward.
  • the bullet-like member (50) is stilled retained in the retention hole of the first shaft section (31), so that the operation cable (39) and the pulley (37) together move the operation tube (36) upward to push up the top cap (41) thereby moving the third shaft section (33) upward.
  • the runner (40) is pulled upward by the runner cable (42) to expand the ribs (70) thereby completing automatic opening of the umbrella.
  • the collapse spring (71) of each of the ribs (70) is set in an elongated condition.
  • the control bar (23) is allowed to move to a horizontal condition and engage the bullet-like member (50).
  • the push button (22) is pressed again so that the control bar (23) pushes the bullet-like member (50) away to disengage from the retention hole of the first shaft section (31).
  • the force induced by the operation cable (39) is removed so that the spring forces of the collapse springs (71) of the ribs (70) cause the ribs (70) and the umbrella canopy to collapse together and force the runner (40) to move downward and at the same time make the third shaft section (33) telescoping downward over the second shaft section (32). Consequently, the expanded the shaft assembly (30) is now turned into a length of only two sections. This allows the subsequent operation of closing the umbrella to be carried out in an easier and more efficient manner.

Landscapes

  • Walking Sticks, Umbrellas, And Fans (AREA)

Description

    (a) Technical Field of the Invention
  • The present invention generally relates to an improved structure of automatic umbrella, and more particularly to an improvement made on a shaft assembly of the automatic umbrella, so that the improved automatic umbrella allows of an easier and more efficient operation of a last stage of compressing and closing the umbrella thereby remarkably reducing the potential risk caused in compressing and closing the umbrella.
  • (b) Description of the Prior Art
  • An early automatic umbrella comprises a control structure and operated in such a way as disclosed in US Patent No. 6,684,893B2 . Such a known umbrella control structure is arranged inside a handle and comprises a hollow main body receiving therein a control ring. A control bar is rotatably attached to the bottom of one side of the control ring. A push button is arranged at one side of the main body and is exposed through a side opening of the handle. Expansion and collapse of the shaft of the umbrella is controlled through the above described arrangement. However, such an automatic umbrella shows a major drawback in the process of compressing and closing the umbrella, for closing umbrella requires an operation of compressing an expansion spring arranged inside the shaft of the umbrella. The expansion spring has an overall length substantially corresponding to the total length of three sections of the shaft and this render the expansion spring an elongate elastic element that shows high strength and large spring force. Consequently, a user's hand must apply a great effort to compress and close the umbrella and must have this done in a single operation. Incaution or negligence in the application of force or compression often lead to accidental release of the expansion spring that springs the shaft back to cause damage of the hand or other body portion of the user. In summary, the known automatic umbrella shows several shortcomings in practical use, which are briefly described as follows:
    1. (1) Depressing the push button to close the umbrella can only collapse the umbrella ribs and the canopy carried thereby, but the shaft still maintains the fully expanded condition with all the three sections thereof extended to the extremes. This makes it difficult for a woman or a young child whose hands are usually short to tightly grip and depress the shaft toward the handle.
    2. (2) Since the length of the expansion spring spans from the first section to the third section of the shaft, such a great length imposes a great strength and spring force to the spring. A user must apply a great force with his or her hands to compress and close the umbrella. This makes compressing and closing the umbrella a difficult operation for a woman or a young child whose hands are generally less strong and powerful.
    3. (3) Due to the great strength and spring force of the expansion spring, any incaution or negligence occurring in the application of force to compress and close the umbrella may lead to undesired spring back of the shaft by the released great spring force of the expansion spring. This may cause physical injuries to the hands or other body portions of the user.
  • Apparently, the known automatic umbrella is generally imperfect in respect of the structural arrangement thereof and may cause inconvenience and danger in operating the umbrella. Improvement is desired to overcome such problems.
  • In US Patent Specification No. 6,112,755 there is described an automatic umbrella comprising a handle and a shaft assembly,
    an operation and control unit being received in the handle and comprising a push button and a control ring,
    the control ring including a control bar and a projecting bar, and
    the shaft assembly comprising first, second and third shaft sections telescopically received in each other, a top cap fixed to the upper end of the third shaft section, a runner movably fitted over the shaft assembly, a bullet-like member arranged inside the shaft assembly, an expansion spring and a plurality of ribs coupled between the top cap and the runner, with each rib being acted upon by a collapse spring.
  • It is an object of the present invention to provide an improved automatic umbrella that can be opened and closed with minimum risk of injury to the user of the umbrella.
  • SUMMARY OF THE INVENTION
  • According to the present invention there is provided an automatic umbrella comprising a handle and a shaft assembly,
    an operation and control unit being received in the handle and comprising a push button and a control ring,
    the control ring including a control bar and a projecting bar, and
    the shaft assembly comprising first, second and third shaft sections telescopically received in each other, a top cap fixed to the upper end of the third shaft section, a runner movably fitted over the shaft assembly, a bullet-like member arranged inside the shaft assembly, an expansion spring and a plurality of ribs coupled between the top cap and the runner, with each rib being acted upon by a collapse spring,
    characterized in that the shaft assembly comprises
    an internal plug received and fixed inside a top portion of the second shaft section and an inner tube received in the second shaft section and having its top end fixed to the internal plug,
    the internal plug having a top end to which an end of a runner cable is attached,
    the runner cable having an opposite end extending upwardly and wrapping around a pulley fixed inside the top cap and extending outwardly for attachment to a top end of the runner,
    the inner tube receiving therein an operation tube that has a top end fixed to the bottom of the top cap,
  • the operation tube having a bottom end that is fitted into and fixed to an operation plug in which a through hole and a fixing hole are formed,
    the inner tube having a top portion receiving and retaining therein a pin or pulley around which an operation cable is wrapped in such a way that an end of the operation cable extends through the through hole for attachment to the top of the bullet-like member and an opposite end of the operation cable is received and fixed in the fixing hole of the operation plug.
  • BRIEF DESCRIPTION OF THE DRAWINGS
    • FIG 1 is a cross-sectional view of an umbrella according to the present invention in a compressed and ready-to-use condition.
    • FIG 2 is a cross-sectional view of the umbrella according to the present invention in an open condition.
    • FIG 3 is a cross-sectional view of the umbrella according to the present invention in a closed condition.
    • FIG 4 is a partial exploded view of a shaft assembly according to the present invention.
    • FIG 5 is an enlarged view of circled portion A of FIG 2.
    DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • The following description provides a convenient illustration for implementing exemplary embodiments of the invention. Various changes to the described embodiments may be made in the function and arrangement of the elements described without departing from the scope of the invention as set forth in the appended claims.
  • Referring to FIG 1, a shaft structure of an automatic umbrella according to the present invention will be described by taking a three-fold umbrella as an example. The umbrella according to the present invention generally comprises a handle (10), an operation and control unit (20), a shaft assembly (30), a runner (40), a top cap (41), a bullet-like member (50), an expansion spring (60), and a plurality of ribs (70) and collapse springs (71). The operation and control unit (20) is arranged inside the handle (10) and comprises a hollow main body that receives therein a control ring (21) and a push button (22) that is arranged inside an opening defined in a sidewall of the handle (10) and exposed outside the handle. The control ring (21) comprises a control bar (23) arranged at the bottom of one side thereof and the control ring (21) also comprises a projecting bar (24) arranged at an opposite side thereof for engaging and releasably retaining the runner (40) to hold the umbrella in a collapsed condition. The shaft assembly (30) comprises a first shaft section (31), a second shaft section (32), and a third shaft section (33) that are telescopically received in each other. The third shaft section (33) has a top end to which and the top cap (41) is fixed. The second shaft section (32) has a top portion receiving and fixing therein an internal plug (35) that fixes an inner tube (34). The first shaft section (31) of the shaft assembly (30) has a bottom end fixed to the main body of the operation and control unit (20). The expansion spring (60) is received inside the first shaft section (31) and the second shaft section (32) of the shaft assembly (30). Each of the ribs (70) is coupled between the runner (40) and the top cap (41).
  • FIGS. 2, 4, and 5 feature the structure of the shaft assembly (30) of the umbrella, which is structured in such a way that an internal plug (35) is fixed to the top end of a second shaft section (32) and an inner tube (34) has a top end fixed to the internal plug (35). The internal plug (35) has a top end to which an end of a runner cable (42) is attached. An opposite end of the runner cable (42) extends upward and wraps around a pulley arranged inside the top cap (41) to extend outward for attaching to a top end of the runner (40). The inner tube (34) receives therein an operation tube (36), and the operation tube (36) has a top end fixed to a bottom of the top cap (41). The operation tube (36) has a bottom end that is fit into and fixed to an operation plug (38) in which a through hole (381) and a fixing hole (382) are formed. The inner tube (34) has a top portion receiving and retaining therein a pulley (37) around which an operation cable (39) wraps in such a way that an end of the operation cable (39) extends through the through hole (381) to attach to a top of the bullet-like member (50) and an opposite end is received and fixed in the fixing hole (382) to thereby attach to the operation plug (38).
  • Referring back to FIG 1, the automatic umbrella is shown in a condition of being compressed and ready to use. The expansion spring (60) contained in the shaft assembly (30) is depressed by the internal plug (35) of the second shaft section (32) and shows a compressed condition. The runner (40) is caught and retained in position by the projecting bar (24) of the control ring (21). At the same time, the control bar (23) is depressed downward by the shaft assembly (30) to show an inclined condition. The bullet-like member (50) is depressed by the inner tube (34) and biased by the spring plate (311) to engage and thus retain in a retention hole formed in the first shaft section (31).
  • Referring to FIG 2, to open the umbrella, the push button (22) is pressed down and the control ring (21) is thus pushed inward to separate the projecting bar (24) from the runner (40), whereby the spring force of the expansion spring (60) contained in the shaft assembly (30) forcibly drives the second shaft section (32) upward. At this moment, the bullet-like member (50) is stilled retained in the retention hole of the first shaft section (31), so that the operation cable (39) and the pulley (37) together move the operation tube (36) upward to push up the top cap (41) thereby moving the third shaft section (33) upward. Under this condition, the runner (40) is pulled upward by the runner cable (42) to expand the ribs (70) thereby completing automatic opening of the umbrella. It is noted that under this condition, the collapse spring (71) of each of the ribs (70) is set in an elongated condition. Further, the control bar (23) is allowed to move to a horizontal condition and engage the bullet-like member (50).
  • Referring to FIG 3, to close the umbrella, the push button (22) is pressed again so that the control bar (23) pushes the bullet-like member (50) away to disengage from the retention hole of the first shaft section (31). Under this condition, the force induced by the operation cable (39) is removed so that the spring forces of the collapse springs (71) of the ribs (70) cause the ribs (70) and the umbrella canopy to collapse together and force the runner (40) to move downward and at the same time make the third shaft section (33) telescoping downward over the second shaft section (32). Consequently, the expanded the shaft assembly (30) is now turned into a length of only two sections. This allows the subsequent operation of closing the umbrella to be carried out in an easier and more efficient manner.
  • The above description of the structure of the shaft of an automatic umbrella is made with respect to a three-fold umbrella. However, it will be appreciated that the present invention is equally applicable to a four-fold or five-fold automatic umbrella, where the fourth section and/or the fifth section of the shaft is or are telescopically coupled below the second section of the shaft.

Claims (2)

  1. An automatic umbrella comprising a handle (10) and a shaft assembly (30),
    an operation and control unit (20) being received in the handle (10) and comprising a push button (22) and a control ring (21),
    the control ring (21) including a control bar (23) and a projecting bar (24), and
    the shaft assembly comprising first, second and third shaft sections (31, 32, 33) telescopically received in each other, a top cap (41) fixed to the upper end of the third shaft section (33), a runner (40) movably fitted over the shaft assembly (30), a bullet-like member (50) arranged inside the shaft assembly (30), an expansion spring (60) and a plurality of ribs (70) coupled between the top cap (41) and the runner (40), with each rib (41) being acted upon by a collapse spring (71),
    characterized in that the shaft assembly (30) comprises
    an internal plug (35) received and fixed inside a top portion of the second shaft section (32) and an inner tube (34) received in the second shaft section (32) and having its top end fixed to the internal plug (35),
    the internal plug (35) having a top end to which an end of a runner cable (42) is attached,
    the runner cable (42) having an opposite end extending upwardly and wrapping around a pulley fixed inside the top cap (41) and extending outwardly for attachment to a top end of the runner (42),
    the inner tube (34) receiving therein an operation tube (36) that has a top end fixed to the bottom of the top cap (41),
    the operation tube (36) having a bottom end that is fitted into and fixed to an operation plug (38) in which a through hole (381) and a fixing hole (382) are formed,
    the inner tube (34) having a top portion receiving and retaining therein a pin or pulley (37) around which an operation cable (39) is wrapped in such a way that an end of the operation cable (39) extends through the through hole (381) for attachment to the top of the bullet-like member (50) and an opposite end of the operation cable (39) is received and fixed in the fixing hole (382) of the operation plug (38).
  2. An automatic umbrella as claimed in Claim 1, characterized in that the shaft assembly (30) includes a fourth section telescopically coupled below the second shaft section (32).
EP20110182677 2011-09-26 2011-09-26 Shaft structure of automatic umbrella Active EP2572602B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20110182677 EP2572602B1 (en) 2011-09-26 2011-09-26 Shaft structure of automatic umbrella

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20110182677 EP2572602B1 (en) 2011-09-26 2011-09-26 Shaft structure of automatic umbrella

Publications (2)

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EP2572602A1 EP2572602A1 (en) 2013-03-27
EP2572602B1 true EP2572602B1 (en) 2014-07-02

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109008118A (en) * 2018-09-29 2018-12-18 刘政 A kind of umbrella structure and the knapsack with the umbrella structure
CN110193148A (en) * 2019-05-28 2019-09-03 淮兰芷 A kind of high building life saving device for earthquake

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5505222A (en) * 1995-08-07 1996-04-09 Fu Tai Umbrella Works, Ltd. Multiple-fold automatic umbrella with simplified control means
US6112755A (en) * 1998-12-15 2000-09-05 Fu Tai Umbrella Works, Ltd. Automatic penta-fold umbrella
US6684893B2 (en) 2001-10-01 2004-02-03 Shih-Shin Kuo Simplified controlling apparatus of an automatic umbrella

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