| Lifting and lowering structure of a long-legged chair -> Monitor Keywords |
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Lifting and lowering structure of a long-legged chairLifting and lowering structure of a long-legged chair description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20080203779, Lifting and lowering structure of a long-legged chair. Brief Patent Description - Full Patent Description - Patent Application Claims
BACKGROUND OF THE INVENTION
1. Field of the Invention The present invention relates to a lifting and lowering structure of a long-legged chair, more particularly one, which is relatively easy to operate for adjusting the height of the seat. 2. Brief Description of the Prior Art Babies and little children don't have enough height or ability to act independent therefore adults sometimes have to seat babies and little children in long-legged chairs. Most of such chairs can be folded with front and rear legs thereof being close together to be easy to store and carry. And, because little children grow taller very rapidly, such chairs should be equipped with height-adjustable seats for suiting little children at different ages. Referring to FIGS. 7 and 8, a currently existing long-legged chair includes a pair of front legs 91, a pair of rear legs 92 each pivoted to a respective one of the front legs 91, a pair of seat supporting members 93, and a seat 94 joined to the seat supporting members 93. The seat supporting members 93 are each fitted on a respective one of the front legs 91 so as to slide over the front legs 91. The seat 94 can be joined to the seat supporting members 93 by any fastening means that allows the seat 94 to be easily fitted to/separated from the seat supporting members 93. Furthermore, the seat supporting members 93 each have a knob 95 fitted thereon, which includes a handle part 951, and a bolt part 952 with outer threads. And, the front legs 91 have several securing holes 911 thereon, which allow the bolt parts 952 of the knobs 95 to be passed into so as to secure the seat supporting members 93 after the seat supporting members 93 are adjusted to a proper height. The above structure has a disadvantage: the knobs 95 have to be passed into the securing holes 911 and turned after the seat supporting members 93 have been adjusted. Consequently, it takes relatively much time and labor to operate such a long-legged chair. SUMMARY OF THE INVENTIONTherefore, it is a main object of the present invention to provide an improvement on a lifting and lowering structure of a long-legged chair, which is easy to operate. A lifting and lowering structure of a long-legged chair according to an embodiment of the present invention includes a pair of seat supporting members, which are each connected to a respective one of front legs of the chair so as to slide up and down over the front legs; each seat supporting member has a hollow protruding portion thereon, which has a hole facing and adjacent to a corresponding front leg, and a button received therein and pivoted thereto. Each button has a pressed portion and an inserted portion passed through a corresponding said hole so as to be received in one of the recessed portions in order for the seat supporting members to be firmly held on the front legs. Furthermore, angle between each button pressed portion and a corresponding inserted portion is blunt; thus, downward force exerted on the seat supporting members will be passed on to the font legs to increase the moment of force, thus making the buttons further passed into and tightly pressed against the recessed portions. When the buttons are pressed at the pressed portions, the inserted portions will be out of the recessed portions of the front legs, and in turn height of the seat supporting members can be adjusted. BRIEF DESCRIPTION OF THE DRAWINGSThe present invention will be better understood by referring to the accompanying drawings, wherein: FIG. 1 is a perspective view of the present invention, FIG. 2 is a fragmentary exploded perspective view of the present invention, FIG. 3 is a side view of the present invention, FIG. 4 is a sectional view of the present invention, taken when the button is partly received in one recessed portion, FIG. 5 is a sectional view of the present invention, taken when the button is apart from the recessed portions, FIG. 6 is a side view of the present invention, taken after the seat is adjusted in height, FIG. 7 is a perspective view of the prior art, and FIG. 8 is a partial sectional view of the prior art. Continue reading about Lifting and lowering structure of a long-legged chair... Full patent description for Lifting and lowering structure of a long-legged chair Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Lifting and lowering structure of a long-legged chair patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Lifting and lowering structure of a long-legged chair or other areas of interest. ### Previous Patent Application: Seating implement with tablet Next Patent Application: Table seat with rotatable sitting portion Industry Class: Chairs and seats ### FreshPatents.com Support Thank you for viewing the Lifting and lowering structure of a long-legged chair patent info. 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