초록 ▼

A retractable bar using a positioning spring leaf and a control device to control positioning between an inner tube and an outer tube is disclosed. The control device includes a movable member, a push button, and a linking device connected between the movable member and the push button. When the pus

A retractable bar using a positioning spring leaf and a control device to control positioning between an inner tube and an outer tube is disclosed. The control device includes a movable member, a push button, and a linking device connected between the movable member and the push button. When the push button is not pushed by an external force, the positioning spring leaf will be pushed by the movable member to force its positioning protrusions into engagement with locating notches of the inner tube to lock the outer and inner tubes. When the push button is pushed by an external force, the linking device will be forced to move the movable member away from the positioning spring leaf, causing the positioning spring leaf to disengage the positioning protrusions from the locating notches of the inner tube.

대표청구항 ▼

1. A push button-controlled retractable bar, comprising: an inner tube comprising a longitudinal sliding groove and at least one series of locating notches located on at least one of two opposite sidewalls of said longitudinal sliding groove and spaced along an axial direction of said inner tube;an

1. A push button-controlled retractable bar, comprising: an inner tube comprising a longitudinal sliding groove and at least one series of locating notches located on at least one of two opposite sidewalls of said longitudinal sliding groove and spaced along an axial direction of said inner tube;an outer tube axially movably sleeved onto said inner tube;a slide seat movably mounted in said longitudinal sliding groove and affixed to said outer tube, said slide seat comprising an elongated slot;a positioning spring leaf comprising a mounting axle affixed to said slide seat, at least one first arm portion outwardly extended from said mounting axle, and at least one positioning protrusion outwardly protruded from said at least one first arm portion in a direction toward said at least one series of locating notches of said inner tube;a control device comprising a movable member movably mounted in said longitudinal sliding groove of said inner tube, a push button, and a linking device set between said movable member and said push button, said movable member comprising a push block inserted into said elongated slot of said slide seat and abutted against said at least one first arm portion of said positioning spring leaf, said push button being mounted in said outer tube and movable between a first position where said push block of said movable member pushes said at least one first arm portion of said positioning spring leaf to force said at least one positioning protrusion into engagement with said at least one series of locating notches of said inner tube and a second position where said push button pushes said linking device to carry said movable member in a direction away from said positioning spring leaf for enabling said positioning spring leaf to move said at least one positioning protrusion away from said at least one series of locating notches of said inner tube subject to an elastic restoring force thereof; andan elastic member set between said slide seat and said movable member and adapted to push said movable member in a direction toward said positioning spring leaf. 2. The push button-controlled retractable bar as claimed in claim 1, wherein said slide seat comprises an end wall defining a through hole; said movable member comprised a raised block defining a screw hole; said linking device comprises a locating block and a link, said link comprising a first end fixedly connected to said locating block and a threaded second end inserted through the through hole of said slide seat and threaded into the screw hole of said movable member; said push button is fixedly mounted at said locating block of said linking device; said elastic member is sleeved onto the threaded second end of said link of said linking device and stopped between said end wall of said slide seat and said raised block of said movable member. 3. The push button-controlled retractable bar as claimed in claim 2, wherein said outer tube comprises a tube body and a grip, said tube body being sleeved onto said inner tube and comprising a first through hole, said grip being capped onto one end of said tube body and comprising a second through hole disposed in communication with the first through hole of said tube body; said push button is mounted in said first through hole of said tube body of said outer tube and said second through hole of said grip. 4. The push button-controlled retractable bar as claimed in claim 3, wherein said push button comprises a bearing block fixedly mounted at said locating block of said linking device and set between said first through hole of said tube body of said outer tube and said second through hole of said grip, and a top cover affixed to a top wall of said bearing block and exposed to an outside of said second through hole of said grip. 5. The push button-controlled retractable bar as claimed in claim 3, wherein said tube body of said outer tube comprises a mounting slot disposed remote from said first through hole; said outer tube further comprises a barrel sleeved onto an opposite end of said tube body of said outer tube and a locating plate affixed to said barrel and mounted in said mounting slot of said tube body of said outer tube and connected to said slide seat. 6. The push button-controlled retractable bar as claimed in claim 5, wherein said slide seat comprises a recessed hole; said locating plate comprises a post engaged in said recessed hole of said slide seat. 7. The push button-controlled retractable bar as claimed in claim 1, wherein said raised block of said movable member is positioned between an end wall and a partition wall of said slide seat; said linking device comprises a top wall affixed to said push button, and a push wall extended from one end of said top wall in a direction toward said slide seat and inserted into a space between said partition wall of said slide seat and said raised block of said movable member; said elastic member has two opposite ends respectively stopped against said end wall of said slide seat and said raised block of said movable member. 8. The push button-controlled retractable bar as claimed in claim 7, wherein said outer tube comprises a tube body, a barrel and a grip, said tube body being sleeved onto said inner tube and comprising a first through hole, said barrel being sleeved onto one end of said tube body and comprising a second through hole kept in communication with said first through hole, said grip being capped onto an opposite end of said tube body; said push button is mounted in said first through hole of said tube body and said second through hole of said barrel. 9. The push button-controlled retractable bar as claimed in claim 8, wherein said push button comprises a bearing block fixedly mounted at said top wall of said linking device and set between said first through hole of said tube body and said second through hole of said grip, and a top cover affixed to a top side of said bearing block and exposed to an outside of said second through hole of said grip. 10. The push button-controlled retractable bar as claimed in claim 9, wherein said tube body of said outer tube comprises a mounting slot disposed adjacent to said first through hole; said outer tube further comprises a locating plate affixed to said barrel and mounted in said mounting slot of said tube body of said outer tube and connected to said slide seat. 11. The push button-controlled retractable bar as claimed in claim 10, wherein said slide seat comprises a recessed hole; said locating plate comprises a post engaged in said recessed hole of said slide seat. 12. The push button-controlled retractable bar as claimed in claim 1, wherein said inner tube comprises two series of locating notched respectively located on the two opposite sidewalls of said longitudinal sliding groove; said positioning spring leaf comprises two first arm portions respectively outwardly extended from said mounting axle, and two positioning protrusions respectively outwardly protruded from said two first arm portions; said push block of said movable member is set between said two first arm portions of said positioning spring leaf. 13. The push button-controlled retractable bar as claimed in claim 12, wherein said push block comprises two bevel faces respectively abutted against said two first arm portions of said positioning spring leaf. 14. The push button-controlled retractable bar as claimed in claim 1, further comprises a return leaf spring mounted at said slide seat and adapted to push said at least one positioning protrusion of said positioning spring leaf in a direction away from said at least one series of locating notches of said inner tube. 15. The push button-controlled retractable bar as claimed in claim 14, wherein said slide seat comprises a partition wall defining a slit; said return leaf spring comprises a mounting portion fastened to said slit of said partition wall of said slide seat, at least one second arm portion extended from said mounting portion in a direction toward said positioning spring leaf, and at least one abutment portion located on a distal end of said at least one second arm portion and positioned between said at least one series of locating notches of said inner tube and said at least one positioning protrusion of said positioning spring leaf. 16. The push button-controlled retractable bar as claimed in claim 15, wherein said inner tube comprises two series of locating notched respectively located on the two opposite sidewalls of said longitudinal sliding groove; said positioning spring leaf comprises two first arm portions respectively outwardly extended from said mounting axle, and two positioning protrusions respectively outwardly protruded from said two first arm portions; said push block of said movable member is set between said two first arm portions of said positioning spring leaf; said return leaf spring comprises two second arm portions respectively extended from said mounting portion in a direction toward said positioning spring leaf, and two abutment portions respectively located on a respective distal end of each of said two second arm portions and respectively positioned between said two series of locating notches of said inner tube and said two positioning protrusions of said positioning spring leaf. 17. The push button-controlled retractable bar as claimed in claim 16, wherein said push block comprises two bevel faces respectively abutted against said two first arm portions of said positioning spring leaf.