Patent Application
20080078912
Referring to
The extensible tube rack set 10 includes an outer tube 11, an inner tube 12, and two locking members 13 which are fixed at one end of the outer tube 11 and the other end of inner tube 12, respectively. In addition, two positioning plates 14 which are provided with hidden claws are located at two ends of the tube rack set 10, respectively. The positioning plate 14 is a triangular plate, above which is transversally located with a round tube 141, and an interior of which is provided with a baffle 142. The positioning plate 14 can be sheathed at an exterior of the corresponding locking member 13 with an end of the round tube 141, and an interior of the other end of round tube 141 is orderly provided with a claw-piece 143 and a plug 144. A center of the aforementioned baffle 142 is provided with a round hole 421 and a plurality of long holes 422 at a rim of the round hole 421. The claw-piece 143 is in a ring-shape, a front end of which is provided with a plurality of thorns 431, and a rear end of which is provided with a plurality of abutting portions 432 corresponding to the long holes 422 of baffle 142. An end of the plug 144 is a disk 441 of a larger diameter, whereas the other end is a cylinder 442 of a smaller diameter. The cylinder 442 is flexible, can be transfixed into the round hole 421 at the center of baffle 142, and its end part is formed outward with an inverted hook 443. A center of the plug 144 is provided with a small hole 444 for protruding a screw 131 of the locking member 13. In assembling, the claw-piece 143 is assembled into the round tube 141 of positioning plate 14 with the plug 144, and the abutting portions 432 of claw-piece 143 are transfixed into the long holes 422 of baffle 142 to be extended out by a pushing of the locking member 13, and can be snapped into the beams 40 (as shown in
According to the aforementioned structures, an automatic elongation structure 15 is located between the locking members 13 being fixed on the outer tube 11 and inner tube 12 of extensible tube rack set 10, respectively. The automatic elongation structure 15 includes a spring 151 and a gliding rod 152. The gliding rod 152 can be abutted on the locking member 13 fixed at the outer tube 11 end, by an elastic force released from the spring 151, such that the outer tube 11 can be extended out automatically, to achieve an object of quick elongation. Whereas, for the aforementioned gliding rod 152, an outer circumference of its piston 521 is installed with an O-ring 522 to be tightly connected with the inner tube 12, and an end opening of the inner tube 12 being extended outward from an abutting rod 523 of the gliding rod 152 is provided with a sealing cap 524 having an inner hole of a diameter such that the abutting rod 523 can just pass through, and that air can be slowly drained out when the gliding rod 152 is moving outward, so as to prevent the extensible tube rack set 10 from bursting out while being elongated.
Moreover, a notch 111 and a hook tip 112 (as shown in
On the other hand, the wiring box 30 of present invention is made by a metallic box 31 and a plastic box 32 being pressed into one body with plastic rivets 33 (as shown in
In addition, an opening place of one fixing hole 321 used to lock with the assembly member 20 is provided with an elastic inverted hook 211 which is projected toward an interior of the hole. When one screw 71 is transfixed into the fixing hole 321, the screw 71 can be fixed in advance by a clipping of the inverted hook 211, so as to facilitate locking on a nut 711 and to decrease a difficulty in assembling with the assembly member 20.
It is of course to be understood that the embodiments described herein is merely illustrative of the principles of the invention and that a wide variety of modifications thereto may be effected by persons skilled in the art without departing from the spirit and scope of the invention as set forth in the following claims.
