BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 Structure drawing of traditional panel fasteners.
FIG. 2 Structure drawing of this invention.
FIG. 3 free space exploded diagram of casing 1 of this invention.
FIG. 4 free space exploded diagram of casing 2 of this invention.
FIG. 5 free space diagram of the spring tab of this invention.
FIG. 6 Free space abridged general view 1 for this invention in use.
FIG. 7 Free space abridged general view 2 for this invention in use.
FIG. 8 Free space abridged general view 3 for this invention in use.
FIG. 9 Free space abridged general view 4 for this invention in use.
DETAILED DESCRIPTION FOR THE INVENTION
The detailed description of this invention according to attached figures is as follows:
As shown in FIG. 2-5, a panel fastener comprises casing 1 and casing 2 fitted with each other. The metal shell of casing 1 is composed of 2 side panels with connecting holes 22 and sleeves 23 stamped on edges of side panels such as top side, bottom side and left side. Sleeves 23 on one side panel insert into holes 22 on the other side panel and they are riveted together to form the casing 1 with its cavity for installation. In casing 1, there is mounted a rotary hook 3 made of steel plate and consisting of a hook-shaped head and a ring-shaped tail 4. Within the said ring-shaped tail, there is an eccentric cam 6 with an eccentric shaft 5. 2 projecting keys 15 spread symmetrically on the sides of the shaft. Both the eccentric cam 6 and the eccentric shaft 5 are made of steel material, of which the eccentric cam 6 is stamped from a steel plate with a connecting hole in its center. Seats are stamped in the connecting hole of the eccentric cam 6 for keys to insert in. In that way, the eccentric shaft 5 is inserted into the eccentric cam 6 and welded together. The end of the eccentric shaft 5 is inner hexagon shaped to match with the hexagon wrench. The eccentric cam 6 is interlocked with the inner wall of the hook 3 by a spring tab 7, which is designed into a uniquely new structure. The spring tab 7, arc-shaped on the whole, has notches 11 on its two ends, whose width is mated with thickness of the eccentric cam 6 and thus the spring tab 7 is embedded with the cam on its two gaps. The arc-shaped back of the spring tab 7 projects on its two sides and dents in middle. For the width of the dented portion 14 is mated with the thickness of ring-shaped tail 4 of the hook, the hook tail is secured in the dented portion 14 of the spring tab 7 between the two projected portions 13. Moreover, the inner sidewall of the dented portion 14 can press against the supporting part between gaps 12 thus to keep the spring tab 7 free of swinging. The space between the supporting part in the middle of two gaps 12 and the inner wall of the hook tail 4 is matched with thickness of the spring tab 7. In that way, even if it looses its elasticity after a long period of use, the spring tab 7 will always keep in touch with the supporting part and the inner wall of the hook and thus work reliably. There are locating dowels 16, which are mated with lip stamped in the side panel of casing 1, respectively fixed on the two sides of gaps in the eccentric cam 6. There is a locating slot 20 in the backside of the hook and correspondingly a cap-shaped projecting locating piece, mated with the slot, stamped on the side panel of the casing 1. The spring tab 7 and the eccentric cam 6 together with the eccentric shaft 5 are mounted in the ring-shaped tail 4. The eccentric shaft 5, with clamping pieces 18 on its two ends, is mounted in rotatable mood into the casing 1 via a shaft hole 19 stamped in the side panel of the casing 1.
In the same way, the metal shell of casing 2 is composed of 2 side panels with connecting holes 22 and sleeves 23 stamped on edges of side panels such as topside, bottom side and right side. Sleeves 23 on one side panel insert into holes 22 on the other side panel and they are riveted together to form the casing 2 with its cavity for installation of a fixed axis 9.
For operation, the said casing 1 and casing 2 are respectively mounted into matching positions on adjacent panels. Turn hexagon wrench inserted into the eccentric shaft 5 to drive it to rotate. As shown in FIG. 6, since the eccentric cam 6, together with the eccentric shaft 5, is interlocked with the hook 3 through the spring tab 7, the hook 3 can surely be driven to rotate and catch the steel fixed axis 9 in casing 2 with its hook-shaped head. As shown in FIG. 7, continue turning the eccentric shaft 5 and produce an eccentric force thanks to the eccentric interlocking between the eccentric shaft 5 and walls of hook tail 4. This force will drive the eccentric cam 6 to rotate against the hook 3 and thus the hook 3 will move parallelly toward casing 1 and self-lock. And the hook head will draw the fixed axis to hold adjacent panels interlocked together. As shown in FIG. 8, when unlocking, insert the hexagon wrench into the eccentric shaft 5 in casing 1 and rotate inversely the hexagon wrench to drive the shaft to rotate inversely. At beginning, the hook 3 cannot rotate with the eccentric shaft 5 and only make translation movement towards casing 2 since the hook head is caught with the steel-made fixed axis 9. After the hook head gets away from the fixed axis 9, the eccentric cam 6 together with the eccentric shaft 5 will be interlocked with the hook 3 with the help of spring tab 7 and make inverse rotation to unlock the fastener (See FIG. 9). When the hook 3 tries to continue rotating upward from the position shown in FIG. 9, the locating slot 20 in the backside of the hook 3 will be fastened with the locating piece in the casing 1 to stop its further rotating. In that way, adjacent panels forming the cooler room can be mounted and dismounted.
Patent Application
20080073913
