Mechanism for opening and collapsing umbrella

Abstract

A mechanism for opening and collapsing an umbrella includes a runner which has two lockers pivotably connected thereto and an operation collar is movably mounted to the shaft of the umbrella so as to operate the two lockers. Each of the lockers is a curved member and pivotably connected to the runner by a pivot. Two ends of the each locker are pivotable relative to the pivot in a direction perpendicular to an axis of the runner. The user simply moves the operation collar to pivot the lockers to open and collapse the umbrella.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exploded view to show two lockers and the runner and the operation collar on the shaft of an umbrella of the present invention;

FIG. 2 shows the first side of each of the lockers of the present invention;

FIG. 3 shows the second side of each of the lockers of the present invention;

FIG. 4 shows a top view of the runner and the two lockers;

FIG. 4A shows a side view of the runner and the operation collar on the shaft;

FIG. 5 is a cross sectional view of the operation collar;

FIG. 6 is a side view of the runner;

FIG. 7A shows the umbrella with the runner and the operation collar on the shaft;

FIG. 7B shows the operation collar is connected to the runner;

FIG. 7C shows a cross sectional view along line C-C in FIG. 7B;

FIG. 7D shows the two lockers are pivoted by the operation collar;

FIG. 8 shows that the operation collar is disengaged from the runner;

FIG. 8A shows a cross sectional view along line C-C in FIG. 8;

FIG. 8B shows that the status two lockers when the operation collar is removed from the runner, and

FIG. 9 shows a conventional mechanism for opening and collapsing an umbrella.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to FIG. 7A, the umbrella includes a shaft 1 with a runner 2 movably mounted on the shaft 1 and stretchers 5 are pivotably connected between the runner 2 and ribs. As shown in FIGS. 1, 2, 3, 4, 4A, 5, and 6, the mechanism for opening and collapsing an umbrella of the present invention comprises the runner and an operation collar 4 which is removably connected to the runner. Both of the runner 2 and the operation collar 4 are mounted on the shaft 1 of the umbrella.

The runner 2 has two C-shaped slots 21 defined therein and two lockers 3 are pivotably engaged with the slots 21. The lockers 3 are connected to the runner 2 symmetrically. Each of the lockers 3 is a curved member and pivotably connected to the runner 2 by two respective pivots 31. Each locker 3 includes a first wing 32, a second wing 33 and the pivot 31 which is located between the first and second wings 32, 33. Each of the lockers 3 has a positioning hole 110 and the pivot 31 is located in the positioning hole 110, two ends of the pivot 31 are engaged with two of the slots 21 of the runner 2. A first protrusion 34 extends from a first side of a top edge of the first wing 32 of each of the lockers 3 and an engaging portion is formed on a second side of the first wing 32 of the locker 3 and located corresponding to the first protrusion 34. The engaging portion is formed on the second side of the locker 3 and is a stepped area. A second protrusion 37 extends from a first side of a low edge of the second wing 33 of each of the lockers 3 and an engaging portion is formed on a second side of the second wing 32 of the locker 3 and located corresponding to the second protrusion 37. A first recess 35 is defined in the second side of the first wing 32. A second recess 36 is defined in the second side of the second wing 33. The second wing 33 has a contact surface 38 extending from the second side thereof and located at top edge of the second wing 33. The first protrusion 34 of the first wing 31 is higher than the first side of the first wing 33.

The operation collar 4 includes insertions 41 extending from an inner periphery of a top thereof and an inner diameter of a space partially enclosed by the insertions 41 is less than an outer diameter of a lower end of the runner 2. The runner 2 has two ridges 22 extending from an outer periphery thereof and the two ridges 22 are located between the lockers 3. The operation collar 4 has gaps 42 defined in an inner periphery thereof and the gaps 42 so that the ridges 22 are engaged therewith, this ensures that the operation collar 4 will not shake in horizontal direction. Each of the ridges 22 has a notch 23 and the operation collar 4 has ribs 43 which are engaged with the notches 23. By the engagement of the ridges 22 and the notches 23, the operation collar 4 is not moved easily.

The first recess 35 allows the operation collar 4 not to be tangled with the locker 3. The first protrusion 34 includes a stepped portion about 0.2 mm high so that when the operation collar 4 moves to the positioning holes 110, the insertions 41 on the operation collar 4 are engaged with the stepped portion of the first protrusions 34 of the two lockers 3 such that the operation collar 4 can be positioned and the umbrella is not collapsed unintentionally. The insertions 41 compress the first protrusions 34 of the first wings 32 and the contact surface 38 of the first wing 32 is engaged with the positioning holes 110 to ensure that the umbrella is opened.

As shown in FIGS. 7A to 7D, when opening the umbrella, the operation collar 4 is moved upward along the shaft 1 and the insertions 41 compress the first protrusions 34 so that the lockers 3 are pivoted to let the contact surfaces 38 engage with the positioning holes 110 in the shaft 1 to ensure that opening of the umbrella.

When collapsing the umbrella, referring to FIGS. 8-8B, the operation collar 4 is moved downward and in contact with the end surface 24 of the lower end of the runner 2. The insertions 41 compress the second protrusions 37 so that the first wings 32 are pivoted outward and the contact surfaces 38 are removed from the positioning holes 110. Because the insertions 41 extend from the inner periphery of the operation collar 4 and the inner diameter of a space partially enclosed by the insertions 41 is less than an outer diameter of a lower end of the runner 2, so that the operation collar 4 can be connected with the runner 2 when the insertions 41 are in contact with the end surface 24 of the runner 2.

While we have shown and described the embodiment in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.

Claims

1. A mechanism for opening and collapsing an umbrella which includes a shaft, comprising: a runner having an operation collar connected thereto which is adapted to be removably mounted to the shaft of the umbrella, two lockers each being a curved member and pivotably connected to the runner by two respective pivots, two ends of the each locker being pivotable relative to the pivot in a direction perpendicular to an axis of the runner.

2. The mechanism as claimed in claim 1, wherein the runner has slots defined therein and the lockers are pivotably engaged with the slots, a first protrusion extends from a first side of each of the lockers and an engaging portion is formed on a second side of the locker and located corresponding to the first protrusion.

3. The mechanism as claimed in claim 2, wherein each of the lockers includes a first wing and a second wing, the pivot is located between the first and second wings, the first protrusion of the first wing is higher than the first side of the second wing, a first recess is defined in a second side of the first wing and a second recess is defined in a second side of the second wing.

4. The mechanism as claimed in claim 3, wherein the second wing has a contact surface extending from the second side thereof and located at top edge of the second wing.

5. The mechanism as claimed in claim 1, wherein each of the lockers has a positioning hole and the pivot is located in the positioning hole, two ends of the pivot are engaged with two of the slots of the runner.

6. The mechanism as claimed in claim 1, wherein the lockers are connected to the runner symmetrically.

7. The mechanism as claimed in claim 1, wherein the operation collar includes insertions extending from an inner periphery of a top thereof and an inner diameter of a space partially enclosed by the insertions is less than an outer diameter of a lower end of the runner.

8. The mechanism as claimed in claim 7, wherein the runner has two ridges extending from an outer periphery thereof and the two ridges are located between the lockers, the operation collar has gaps defined in an inner periphery thereof and the gaps so that the ridges are engaged therewith.

9. The mechanism as claimed in claim 8, wherein each of the ridges has a notch and the operation collar has ribs which are engaged with the notches.

10. The mechanism as claimed in claim 2, wherein the engaging portion formed on the second side of the locker is a stepped area.