As shown in Figure 1, an end of the
support bar 1 in the present embodiment is installed on the windowsill 3 by
free bearing 2, and an end of the other end and
brake block 4 is hinged, and the other end of
brake block 4 and
slide block 5 are hinged by
hinge 7, and brake block can rotate around this hinge;
Slide block 5 be one in the present embodiment "
" the type slide block;
slide rail 6 can be a garden steel bar; be installed in the slide block; two ends are fixed on the window 9 with
holder 8; slide rail leaves certain distance so that stay enough spaces for the motion of slide block apart from window; the rigging position between its slide block, slide rail and the brake block is referring to Fig. 2, Fig. 3, and wherein 10 is the stop surface of slide block, and the side that this stop surface is relative with slide rail, controll block and slide rail is relative.This stop surface can be made into matsurface, the frictional force when contacting with slide rail to increase it.The side relative with slide rail of
brake block 4 is eccentric garden arc boss in the present embodiment, as shown in Figure 4, and this garden arc boss
Section is for being the garden camber line of the garden heart with O1,
Section is for being the garden camber line of the garden heart with O2, and the O point is the pin joint of slide block and controll block, and AO1>BO, and CO2<BO when the switch window, withstands controll block with hand and makes
The contact of Duan Buyu slide rail has then kept the
stop surface 10 of slide block and the spacing between the slide rail, and slide block then can slide and drive window and move along slide rail.When wind blew window toward the direction opened, support
bar 1
pulling controll block 4 made it rotate around
hinge 7, rolls on slide rail simultaneously, makes
Section is touched mutually with slide rail, and fixed slide rail push up
hinge 7 outward, and hinge 7 drive slide blocks are close and
stop surface 10 is close to slide block can not be slided to slide rail, thereby limited the opening movement of window; When wind-force made window toward the direction motion of closing, support bar promoted controll block and makes controll block
Section is touched mutually with slide rail, because
The distance that each point is ordered apart from O on the section all is less than or equal to the distance that the B point is ordered apart from O, so the rotation of controll block can not make the stop surface of slide block and slide rail be adjacent to, so window can close back under the effect of wind-force voluntarily, owing to can not move, has the function of locking window in the other direction.A
handle 11 is set on slide rail, can makes things convenient for the door operation.In the stop of this unidirectional spacing form, can be on slide rail one of suit tenon
shape locking pin 12 slidably, at the needs reversible lock regularly, the locking pin plug is got final product between controll block and slide rail.
With aforesaid AB, BC section symmetric design, get BO2=AO1>BO, can make the two-way voluntarily locking of window.