Patent Application
20090000028
(1) Field of the Invention
The invention relates in general to a baby crib, and more particularly to an arc type baby crib having horizontal top tubes convex outwards, arc type upright tubes and inclined corner seats so that the inclined corner seat makes the top tube and the upright tube be firmly and strongly combined together when the upright tube under the inclined corner seat is not perpendicular to the top tube in the baby crib.
(2) Description of the Prior Art
As shown in
As shown in
The corner seat 14 has a three-way fitting housing assembly on an X-Y-Z coordinate distribution. Two horizontal pivoting housings 141 and 142 are disposed on the X and Y axes, and one pivoting tube 143 extending vertically and downwards is disposed along the Z axis. Because the longitudinal top tube 11 and the transversal top tube 12 are arced, the angles of the pivoting housings 141 and 142 (X and Y axes) of the corner seat 14 are greater than 90 degrees so that the arced top tube 11(12) can be inserted into the pivoting housing 141(142), and the pivoting tube 143 (Z axis) of the corner seat 14 is perpendicular to the floor.
Because the pivoting tube 143 (Z axis) of the corner seat 14 is perpendicular to the floor, the upper portion of the upright tube 16 pivotally connected to the corner seat 14 and the lower portion of the upright tube 16 pivotally connected to the base 15 have to be straight portions. So, the middle portion of the upright tube 16, which may be arced, is short so that the upright tube 16 cannot be sufficiently arced. In addition, the upright tube 16 is pivotally connected to the corner seat 14 through a single rivet, which is exposed outside and cannot be glorified.
U.S. Pat. No. D494,393 discloses an arc type baby crib having longitudinal top tubes and transversal top tubes and a corner seat. A pivoting tube of the corner seat is perpendicular to the floor. Although the top tubes are arced, only the shorter top tubes are convex upwards and the longer top tubes are convex downwards. Thus, the top tubes are convex upwards and downwards and the exterior of the baby crib is not symmetrical and cannot be glorified.
U.S. Pat. No. D448,218 discloses a baby crib having arced upright tubes and straight top tubes, so the baby crib cannot be named as an arc type baby crib.
U.S. Pat. No. 6,859,957 discloses an arc type baby crib having four corner seats pivotally connected to straight top tubes, four bases pivotally connected to straight bottom tubes, and arc type upright tubes each disposed between the corner seat and the base. The arc type upright tube is not really arced but has two straight upper and lower portions to be pivotally connected to the corner seat. So, the exterior of the baby crib is not symmetrical.
The common feature of the arc type baby crib and the typical baby crib is that the pivoting tube (Z axis) under the corner seat is perpendicular to the floor, or the angles of two horizontal pivoting tubes (X and Y axes) of the corner seat of the arc type baby crib are greater than 90 degrees.
It is therefore an object of the invention to provide an arc type baby crib including inclined corner seats, horizontal and arc type top tubes and more arced upright tubes so that the arc type baby crib is symmetrical and the top tube and the upright tube are combined with the inclined corner seat symmetrically.
Another object of the invention is to provide an arc type baby crib having inclined corner seats, wherein the inclined corner seat can be combined with an upright tube firmly when the upright tube under the inclined corner seat is not perpendicular to the top tube.
The invention achieves the above-identified object by providing an arc type baby crib having inclined corner seats. The baby crib has four inclined corner seats and four horizontal top tubes, four lower bases and a plurality of horizontal bottom tubes. An upright tube is pivotally connected to the inclined corner seat and the base. The inclined corner seat is pivotally connected to the top tube. The top tube is arced and has a joint at a middle thereof, and the upright tube is arced. The inclined corner seat is inclined by an angle toward a center of the baby crib so that a portion of the inclined corner seat pivotally connected to the upright tube is not perpendicular to a floor, the top tube has a straight end portion inserted into and pivotally connected to the inclined corner seat. An inner wall of the inclined corner seat is formed with a land track corresponding to a sliding slot of the upright tube. A more arced upright tube is formed so that the arc type baby crib can be fabricated according to an inclined angle of the inclined corner seat. The inclined corner seat makes the top tube and the upright tube be firmly and strongly combined together through the land track and the sliding slot when the upright tube under the inclined corner seat is not perpendicular to the top tube.
Further aspects, objects, and desirable features of the invention will be better understood from the detailed description and drawings that follow in which various embodiments of the disclosed invention are illustrated by way of examples.
First, an arc type baby crib 20 having inclined corner seats according to the invention is illustrated in
Four bases 26 are provided at the bottom of the baby crib 20, and several bottom tubes 27 including two parallel tubes or rectangular combination of tubes or X-shaped tubes are provided. The top of the base 26 is pivotally connected to the upright tube 25 so that the upright tube 25 is pivotally connected to and between the inclined corner seat 21 and the base 26. The top tube 22(23) has a straight inserting end portion 221(231) pivotally connected to the inclined corner seat 21. The pivoting tube 213 under the inclined corner seat 21 is not vertical but is perpendicular to the pivoting housings 211 and 212 of the inclined corner seat 21. In addition, the transversal top tubes 22 and the longitudinal top tubes 23 are disposed horizontally and are convex outwards. The joint 24 makes it possible to develop the top tube 22(23) to a horizontal state for positioning, or to retract the top tube 22(23) to a V shape. A turning connection shank 28 is disposed at the middle of the bottom tube 27 so that the bottom tube 27 can be developed to a horizontal state or may be retracted to an inverse-V-shape.
According to the above-mentioned combined structure, the inclined corner seat for the arc type baby crib according to the invention is mainly inclined inward so that the upright tube 25 can be further arced. Also, the land track 214 of the inclined corner seat 21 is combined with the sliding slot 251 of the upright tube 25 so that the assembled structure is reinforced. Although the pivoting tube 213 under the inclined corner seat 21 does not extend in a vertical direction, the assembled structure still can be reinforced because the land track 214 and the sliding slot 251 can be combined firmly.
When the pivoting housings 211 and 212 of the inclined corner seat 21 are perpendicular to each other, the top tubes 22 and 23 that are convex outwards can be utilized. So, it is unnecessary to manufacture the inclined corner seat with two pivoting housings defining an angle larger than 90 degrees. In addition, the inclined corner seat 21 is inclined inward, and the top tube 22(23) has the straight inserting end portion 221(231) to be pivotally connected to the inclined corner seat 21. Thus, when the baby crib 20 is retracted, the joints 24 of the top tubes 22 and 23 can be rotated so that the top tubes 22 and 23 are bent downward. Although the top tubes 22 and 23 are convex outwards, the joints 24 of the top tubes 22 and 23 extend vertically downward without being shifted inward. So, when the top tubes 22 and 23 having the joints 24 are folded downward, the top tubes 22 and 23 cannot be blocked by the inverse-V-shape bottom tube 27 that is folded. Thus, the inclined corner seats 21 can be smoothly moved alongside, as shown in
The arced top tubes 22(23) are disposed horizontally and symmetrically and are convex outwards. Also, the upright tube 25 is significantly arced and does not approach an upright tube. The provision of the inclined corner seat 21 can solve the problem of the insufficient curvature of the upright tube 25. Although the inclined corner seat 21 does not extend downward and vertically and the upper half portion of the upright tube 25 is not an upright tube, the invention still can reinforce the assembly of the land track 214 and the sliding slot 251 without loose and shaking conditions.
New characteristics and advantages of the invention covered by this document have been set forth in the foregoing description. It is to be expressly understood, however, that the drawings are for the purpose of illustration only and are not intended as a definition of the limits of the invention. Changes in methods, shapes, structures or devices may be made in details without exceeding the scope of the invention by those who are skilled in the art. The scope of the invention is, of course, defined in the language in which the appended claims are expressed.
