A BELT BUCKLE
This invention relates to an improved belt buckle used in daily commodities.
Currently available belt buckles in everyday life can only have their position fixed when holes are made in the belt, as the belt buckle shown in Figure 1. The artistic quality of the belt is thus damaged. Moreover, the positions cannct be steplessly fixed at will. The belt buckle shown in Figure 2 has its position fixed by means of a bar which presses the belt. Belt buckles of this kind are not tightly secured. Besides, one end sticks out, causing inconvenience in use.
It is an object of the present invention to provide a belt buckle which prevents the belt from being damaged and keeps it pleasing to the eye, and which is convenient and reliable for use.
According to the present invention there is provided a belt buckle comprising a U-shaped plate provided with a stop bar and a guiding bar on the respective two ends of the opening thereof and an inner piece being placed at the centre thereof and being made up of a guiding plate, a cylinder, a shaft and two connecting rods, said shaft being assembled in bores of said guiding plate for clearance fit and the two ends thereof being fixed to said two connecting rods, said guiding plate being securely connected with the two sides of said U-shaped plate, said cylinder being assembled in bores of said two connecting rods for clearance fit so that, when a belt moves in the direction of said stop bar, said cylinder is caused to revolve around said shaft and move closer to said stop bar, leading said cylinder and said stop bar to press said belt and stop it from any movement.
In the present belt buckle, one end of the belt can be connected to the guiding plate by means of a set screw structure or tooth engaging structure. Besides, the centre line of the two bores of the connecting rods can be parallel to the axis of said shaft. The U-shape plate may be one of the following constructions, namely: one end respectively of the stop bar and the guiding bar being connected to the U-shape plate, while each of the unconnected ends being an opening; the two ends respectively of the stop bar and the guiding bar being connected to the U-shape plate; and the two ends of the guiding bar and one end of said stop bar being connected to the U-shape plate while the unconnected end of the stop bar being an opening. The belt buckle may be as a whole made of metal or the inner piece thereof made of plastics.
Compared with the prior art, the way in which the belt can be placed is changed in this invention, so that the belt, instead of being moved about in the belt buckles, can be inserted from above through the opening of the stop bar and/or guiding bar making it convenient for use. As the guiding plate and the shaft, the cylinder and the connecting rod are all in clearance fit, balanced movement of the belt is guaranteed and the belt is prevented from being damaged, thus providing the advantages of the belt requiring no holes be made and being steplessly fixed at will, as well as the two ends being covered.
For a better understanding of the invention and to show how the same may be carried into effect, reference will now be made, by way of example, to the accompanying drawings, in which:
Figure 1 is a cross-sectioned view of a known belt buckle for which holes are made in the belt;
Figure 2 is a cross-sectioned view and a perspective view of another type of belt buckle with one end of the belt sticking out and with no holes made in the belt;
Figure 3 is a perspective view of a belt buckle according to the present invention;
Figure 4 is an enlarged front view of the belt buckle shown in Figure 3;
Figure 5 is an enlarged top view of the belt buckle according to the present invention;
Figure 6 is a perspective view of a U-shaped plate of the belt buckle of Figure 3;
Figure 7 is a perspective view of the inner plate taken from the belt buckle in Figure 3;;
Figure 8 is a perspective view of a guiding plate thereof;
Figure 9 is an enlarged front view of the guiding plate;
Figure 10 is an enlarged plan view of the guiding plate;
Figure 11 is a perspective view of the shaft and the connecting rod;
Figure 12 is a perspective view of the cylinder;
Figure 13 is an enlarged cross-sectional top view of the present belt buckle in which one end of the belt is connected with screw nails;
Figure 14 is an enlarged cross-sectional top view of the present belt buckle during operation, in which one end of the belt is secured by means of a tooth engaging structure;
Figure 15 is a perspective view of a belt buckle according to the present invention in which the both ends of the stop bar and of the guiding bar are connected with the U-shape plate;;
Figure 16 is a perspective view of a belt buckle according to the present invention in which one end of the stop bar is not connected with the U-shaped plate.
Referring now to Figures 3-7, a belt buckle according to the present invention (Figure 3) can be divided into two main parts; U-shaped plate 1 (Figure 6) and inner piece 3 (Figure 7). A stop bar 2 and a guiding bar 4 are provided on the U-shaped plate 1. The U-shaped plate 1, stop bar 2 and guiding bar 4 are taken as one component cast or pressed by metal. The inner piece 3 is made up of guiding plate 5, shaft 6, connecting rods 7 and cylinder 8. The shape of guiding plate is shown in
Figures 8-10 while shaft 6, connecting rods 7 and cylinder 8 may have shapes respectively as shown in
Figures 11 and 12. the shaft 6 is inserted and assembled in the two bores of the guiding plates 5 for clearance fit. The cylinder 8 is inserted into the respective bores of two pieces of connecting rod 7 for clearance fit.The shaft 6 is welded to and fixed to connecting rods 7 and the centre line of the two bores of the connecting rods 7 is guaranteed to be parallel to the axis of shaft 6. After that, the whole inner piece 3 is fixed to the side plate of U-shape plate 1, by means of welding and through the two sides of guiding plate 5. A slot is left between inner piece 3 and the U-shaped plate 1, with one end of belt 9 inserted into said slot, and secured by two screws through two screw holes in guiding plate 5 (Figure 13). The said one end of belt 9 may also be secured by a tooth engaging structure as known in the prior art (Figure 14). The other end of belt 9 must be inserted from stop bar 2 and then pass through guiding bar 4, as shown in Figure 14. During operation, under external forces, as that shown by the arrows (*-I) shown in Figure 14, the belt 9 can have a one-way movement towards guiding bar 4 (connecting rods 7 remaining vertical to U-shaped plate 1 and without moving at this stage); under the external forces (-4), when the belt 9 is moving in the direction of stop bar 2, cylinder 8 will be caused to revolve around shaft 6 and be closer to stop bar 2, so that cylinder 8 and stop bar 2 press the belt, and as a result belt 9 cannot further move in the direction of stop bar 2 and can be kept tight.To release the buckle, external forces
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should be given to cause the cylinder 8 to revolve away from the stop bar 2 to the position where connecting rods 7 are vertical to U-shape plate 1, then keeping cylinder 8 without revolving round shaft 6, belt 9 can be moved in the direction of stop bar 2 easily, since the distance between cylinder 8 and stop bar 2 is now bigger than the thickness of belt 9.
Guiding plate 5, shaft 6, connecting rods 7 and cylinder 8 are made of metal but may also be made of plastics.
Besides, stop bar 2 and guiding bar 4 may have their respective one end connected with the U-shape plate while the other end unconnected, as shown in Figure 3; or their respective two ends connected with U-shape plate 1, as shown in Figure 15; or both two ends of guiding bar 4 are connected with U-shape plate 1 while one end of stop bar 2 is connected with U-shape plate 1 and the other end unconnected (Figure 16). When one end of stop bar 2 or guiding bar 4 or of both is unconnected with the U-shape plate 1, the belt 9 can be vertically inserted or pulled out through the opening formed therebetween.