as shown in fig1 , a slide member 1 of a preferred embodiment of the present invention comprises a side wall 11 , a bottom wall 12 and a track 13 . the side wall 11 extends vertically . the bottom wall 12 extends horizontally to connect with the side wall 11 . the track 13 is in a reverse u shape . one side wall of the track 13 extends vertically to connect with the bottom wall 12 . as shown in fig2 and 3 , the slide member 1 is in conjunction with another one - section slide to form a slide assembly . the track 13 of the slide member 1 is provided with a first stopper 14 on one end of the track 13 and a pair of first suspension rollers 15 on two side walls of the track 13 . a first rail 2 fits onto the track 13 of the slide member 1 . the first rail 2 is in a reverse u shape . the first rail 2 has a pair of bending sections 21 extending from two side walls thereof . the bending sections 21 engage with the first suspension rollers 15 . one end of the first rail 2 is provided with a first linking part 22 . a first bearing carrier 16 is provided between the first rail 2 and the track 13 . the first bearing carrier 16 comprises a first base 161 in a reverse u shape . first rollers 162 are provided on the top and two sides of the first base 161 . the first bearing carrier 16 will be stopped by the first stopper 14 . as shown in fig4 , the first stopper 14 may be provided with a first supporting roller 141 with a portion exposed outwardly from the top of the first stopper 14 . the slide assembly further comprises an automatic retractable device . as shown in fig5 and 6 , a retracting base 4 is provided under the track 13 of the slide 1 . the retracting base 4 comprises a vertical engaging section 41 and a horizontal bottom board 42 . the engaging section 41 has a tenon 411 and a through hole 412 . the engaging section 41 of the retracting base 4 is inserted and secured to the track 13 . the track 13 has a locking hole 131 on one side wall thereof . an axle 15 is inserted through the track 13 to secure the first suspension rollers 15 . the tenon 41 of the engaging section 41 engages with the locking hole 131 , and the axle 151 is inserted through the through hole 412 of the engaging section 4 to secure the retracting base 4 . the bottom board 42 of the retracting base 4 further comprises a trough 421 . a pulling part 43 is inserted through the trough 421 . the pulling part 43 comprises a block 431 and a hook 432 . the hook 432 is pivotally connected to the block 431 , and can be swung slightly . as shown in fig3 , the first linking part 22 of the first rail 2 engages with the hook 432 of the retracting base 4 . an elastic element 44 is provided on the engaging section 41 of the retracting base 4 . the elastic element 44 has two ends connected to the end of the engaging section 41 and the block 431 of the polling part 43 , respectively . the above - mentioned slide assembly having an automatic retractable device further comprises a buffer device . a buffering member 5 is provided between the track 13 and the engaging section 41 of the retracting device 4 , as shown in fig7 . the buffering member 5 has a fixed end 51 and a buffer rod 52 . the fixed end 51 engages with the end of the engaging section 41 , and the buffer rod 52 facing the block 431 of the pulling part 43 is designed to extend automatically . furthermore , the slide member 1 is in conjunction with a two - section slide to form another slide assembly . other than the slide member 1 , the first stopper 14 , the first bearing carrier 16 , and the first rail 2 , as shown in fig8 and 9 , the slide assembly further comprises a second rail 3 fitting onto the first rail 2 . the second rail 3 is in a reverse u shape . the second rail 3 has a pair of bending sections 31 extending from two side walls thereof . one of the side walls of the second rail 3 is provided with a second linking part 32 . ( in this embodiment , the first linking part 22 of the first rail 2 will not be included .) a second stopper 23 is provided on the top of the first rail 2 . a pair of second suspension rollers 24 is provided on two side walls of the first rail 2 . the bending sections 31 of the second rail 3 engage with the second suspension rollers 24 . a second bearing carrier 25 is provided between first rail 2 and the second rail 3 . the second bearing carrier 25 comprises a second base 251 in a reverse u shape . second rollers 252 are provided on the top and two sides of the second base 251 . the second bearing carrier 25 will be stopped by the second stopper 23 . as shown in fig1 , the second stopper 23 may be provided with a second supporting roller 231 with a portion exposed outwardly from the top of the second stopper 23 . as shown in fig9 , the track 13 of the slide member 1 is overlapped with the first bearing carrier 16 , the first rail 2 , the second bearing carrier 25 and the second rail 3 in sequence . the first rail 2 is linked by the first bearing carrier 16 to slide along the track 13 , while the second rail 3 is linked by the second bearing carrier 25 to slide along the first rail 2 . meanwhile , the track 13 of the slide member 1 provides a space which is appropriate for installation of the retracting base 4 , the elastic element 44 , and the buffering member 5 . the first bearing carrier 16 and the second bearing carrier 25 can carry the weight of the first rail 2 and the second rail 3 and link the first rail 2 and the second rail 3 to slide with respect to the track 13 of the slide member 1 . fig1 shows the operation of the three - section slide assembly of the present invention . when both the first rail 2 and the second rail 3 are retreated onto the slide member 1 , the second linking part 32 on the side wall of the second rail 3 will be stopped by the hook 432 of the retracting base 4 . that provides a tight collapsing force . as shown in fig1 , the second rail 3 is in an extension status . when the second rail 3 is pulled outward , the second linking part 32 on the side wall of the second rail 3 will link the hook 432 to slide along the trough 421 forward until the hook 432 engages with the front of the retracting base 4 and the second linking part 32 disengages with the hook 432 . when the second rail 3 is pulled outwardly , the first bearing carrier 16 and the second bearing carrier 25 will slide along the track 13 of the slide member 1 and the first rail 2 outwardly . when the hook 432 of the pulling part 43 is pulled outward by the second linking part 32 of the second rail 3 , the block 431 of the pulling part 43 is also linked to move forward , which links the elastic element 44 to be pulled simultaneously . the buffer rod 52 of the buffering member 5 is also linked with the block 431 to extend outwardly , that provides a buffering effect when the second rail 3 and the first rail 2 are pushed inward to slow down the movement . when the first rail 2 and the second rail 3 are in a full extension , as shown in fig1 , the front of the first bearing carrier 16 will be in touch with the first stopper 14 at the front of the track 13 of the slide member 1 . a stopper ( not shown ) provided at the rear of the first rail 2 engages with the first bearing carrier 16 to stop the movement . when the second rail 3 is pulled outward in a full extension , the front of the second bearing carrier 25 will be in touch with the second stopper 23 at the front of the first rail 2 . a stopper ( not shown ) provided at the rear of the second rail 3 engages with the second bearing carrier 25 to stop the movement .
a slide member and a slide assembly having the slide member are provided , in particular to a reinforcing structure of the slide member and the slide assembly . the slide member further comprises an automatic retractable device therein and may be in conjunction with a single - section or two - section slide to from a slide assembly in a stronger structure and a steady sliding operation .