Buckle Structure for Seat Belt of Vehicle

Abstract

A buckle structure for a seat belt of a vehicle contains: a body, a rotation member, a locking device, and multiple buckles. The body includes a fixing mount and a cover, the fixing mount includes multiple grooves, each of which is defined between any two adjacent of multiple protrusions. The rotation member is mounted on the cover, and the locking device is defined between the fixing mount and the cover. The locking device includes a central shaft and an actuation sheet, and the central shaft has two opposite semicircular columns. The actuation sheet has an aperture, a hollow pillar, and multiple openings, wherein the hollow pillar has two opposite semicircular cutouts, an arcuately concave channel, two release tabs, and two symmetrical sliding channels. A first end of each buckle is connected with the seat belt, and a second end of each buckle has a connection head with a hole.

Claims

1. A buckle structure for a seat belt of a vehicle comprising: a body including a fixing mount and a cover covering the fixing mount, the fixing mount including a plurality of grooves, each of the plurality of grooves being defined between any two adjacent of multiple protrusions; a rotation member mounted on a top of the cover; a locking device defined between the fixing mount and the cover, and the rotation member drives the locking device; the locking device including a central shaft and an actuation sheet; the central shaft being driven by the rotation member to rotate, and the central shaft having two opposite semicircular columns extending outwardly therefrom; wherein the actuation sheet has an aperture defined on a center thereof, a hollow pillar stamp bent around and perpendicular to the aperture of the actuation sheet, and multiple openings formed on a peripheral side of the actuation sheet, wherein the central shaft inserts through the aperture and the hollow pillar, the hollow pillar has two opposite cutouts, an arcuately concave channel defined on a center of each of the two opposite cutouts, two release tabs arranged on two ends of the hollow pillar respectively, and two symmetrical sliding channels defined between the two release tabs of two ends of the arcuately concave channel and the two opposite semicircular cutouts respectively, the arcuately concave channel is coupled with the two symmetrical sliding channels, and coefficients of spiral surfaces of the arcuately concave channel and the two sliding channels are different, wherein the arcuately concave channel is flat, and the two sliding channels are steep; and multiple buckles, wherein a first end of each of the multiple buckles is in connection with the seat belt, and a second end of each buckle has a connection head with a hole, when the connection head of each buckle inserts into one of the plurality of grooves of the body, the locking device locks in the hole so that the buckle fastens with the body, and when the rotation member is rotated, the two opposite circular columns of the central shaft push the actuation sheet to lift toward the cover at an opening height so that the locking device unfastens from the hole, thus removing the buckle from the body.

2. The buckle structure as claimed in claim 1, wherein the two opposite cutouts of the hollow pillar are semicircular.

3. The buckle structure as claimed in claim 1, wherein a lowest contact point is formed on a center of the arcuately concave channel, an idle rotation angle is defined among each of two sides of the arcuately concave channel and the lowest contact point, and the arcuately concave channel has two symmetrical highest points forming on two ends thereof respectively, wherein an idle rotation height is defined among the two symmetrical highest points and the lowest contact point of the arcuately concave channel, and the idle rotation height is less than the opening height.

4. The buckle structure as claimed in claim 3, wherein the idle rotation angle is within 20 to 30 degrees, and a preferred idle rotation angle is 25 degrees.

5. The buckle structure as claimed in claim 1, wherein each of the plurality of grooves has a slot extending from a central position thereof so as to accommodate an elasticity set which has a slidable block and a resilient element, wherein the slidable block has a notch defined therein so as to accommodate a first end of the resilient element, and a second end of the resilient element abuts against the slot.

6. The buckle structure as claimed in claim 1, wherein the cover covers the fixing mount and is fixed by a screw, wherein the cover includes an accommodation chamber defined therein, and the cover includes multiple posts extending outwardly from the accommodation chamber; the locking device includes a fixed bolt element, multiple movable bolts, a returning spring, a positioning disc, and multiple sprigs, wherein the returning spring fits on the central shaft, the returning spring abuts against the cover and the actuation sheet, and the positioning disc has multiple orifices defined adjacent to a peripheral side thereof and configured to accommodate the fixed bolt element and the multiple movable bolts individually.

7. The buckle structure as claimed in claim 1, wherein the central shaft partially extends out of the cover and connects with the rotation member.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG. 1 is a perspective view showing the assembly of a buckle structure for a seat belt of a vehicle in accordance with a preferred embodiment of the present invention.

[0019] FIG. 2 is a perspective view showing the exploded components of the buckle structure for the seat belt of the vehicle in accordance with the preferred embodiment of the present invention.

[0020] FIG. 3 is a perspective view showing the assembly of a part of the buckle structure for the seat belt of the vehicle in accordance with the preferred embodiment of the present invention.

[0021] FIG. 4 is a side plan view showing the assembly of a part of the buckle structure for the seat belt of the vehicle in accordance with the preferred embodiment of the present invention.

[0022] FIG. 5 is a top plan view showing the assembly of a part of the buckle structure for the seat belt of the vehicle in accordance with the preferred embodiment of the present invention.

[0023] FIG. 6 is another perspective view showing the assembly of a part of the buckle structure for the seat belt of the vehicle in accordance with the preferred embodiment of the present invention.

[0024] FIG. 7 is a cross sectional view taken along the line of A-A of FIG. 6.

[0025] FIG. 8 is a cross sectional view showing the operation of the buckle structure for the seat belt of the vehicle in accordance with the preferred embodiment of the present invention.

[0026] FIG. 9 is a perspective view showing the operation of the buckle structure for the seat belt of the vehicle in accordance with the preferred embodiment of the present invention.

[0027] FIG. 10 is a side plan view showing the operation of the buckle structure for the seat belt of the vehicle in accordance with the preferred embodiment of the present invention.

[0028] FIG. 11 is a cross sectional view showing the operation of the buckle structure for the seat belt of the vehicle in accordance with the preferred embodiment of the present invention.

[0029] FIG. 12 is another side plan view showing the operation of the buckle structure for the seat belt of the vehicle in accordance with the preferred embodiment of the present invention.

[0030] FIG. 13 is also another side plan view showing the operation of the buckle structure for the seat belt of the vehicle in accordance with the preferred embodiment of the present invention.

[0031] FIG. 14 is still another cross sectional view showing the operation of the buckle structure for the seat belt of the vehicle in accordance with the preferred embodiment of the present invention.

[0032] FIG. 15 is a perspective view showing the exploded components of a conventional buckle structure for a seat belt of a vehicle.

[0033] FIG. 16 is a side plan view showing the exploded components of the conventional buckle structure for the seat belt of the vehicle.

[0034] FIG. 17 is a perspective view showing the assembly of the conventional buckle structure for the seat belt of the vehicle.

[0035] FIG. 18 is a side plan view showing the operation of the conventional buckle structure for the seat belt of the vehicle.

[0036] FIG. 19 is a cross sectional view showing the operation of the conventional buckle structure for the seat belt of the vehicle.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0037] The present invention will be clearer from the following description when viewed together with the accompanying drawings, which show, for purpose of illustrations only, a preferred embodiment in accordance with the present invention.

[0038] With reference to FIGS. 1-7, a buckle structure for a seat belt of a vehicle in accordance with a preferred embodiment of the present invention comprises: a body A1 and multiple buckles A2, wherein the body A1 includes a fixing mount 10, a cover 20, a locking device 30, a rotation member 40, and a screw 50, wherein a first end of each of the multiple buckles A2 is in connection with the seat belt A3, and a second end of each buckle A2 has a connection head A21 with a hole A211.

[0039] The fixing mount 10 includes multiple protrusions 11 separately arranged on a peripheral side of a top thereof, and the fixing mount 10 includes a plurality of grooves 12, each of the plurality of grooves 12 is defined between any two adjacent protrusions 11, each groove 12 has a slot 14 extending from a central position thereof so as to accommodate an elasticity set 13 which has a slidable block 131 and a resilient element 132, wherein the slidable block 131 has a notch 1311 defined therein so as to accommodate a first end of the resilient element 132, and a second end of the resilient element 132 abuts against the slot 14, wherein the resilient element 132 is a compression spring.

[0040] The cover 20 covers the fixing mount 10 and is fixed by the screw 50, wherein the cover 20 includes an accommodation chamber 21 defined therein, and the cover 20 includes multiple posts 22 extending outwardly from the accommodation chamber 21.

[0041] The locking device 30 is housed in the accommodation chamber 21 of the cover 20, and the locking device 30 includes a fixed bolt element 31, multiple movable bolts 32, a central shaft 33, an actuation sheet 34, a returning spring 35, a positioning disc 36, and multiple sprigs 37, wherein the fixed bolt element 31 and the multiple movable bolts 32 are fitted on the multiple posts 22 of the cover 20 by way of the multiple sprigs 37 respectively, wherein the central shaft 33, the actuation sheet 34, and the returning spring 35 are housed in the accommodation chamber 21 of the cover 20. The central shaft 33 has two opposite circular columns 331 extending outwardly therefrom, the actuation sheet 34 has an aperture 341 defined on a center thereof, a hollow pillar 342 stamp bent around and perpendicular to the aperture 341 of the actuation sheet 34, and multiple openings 343 formed on a peripheral side of the actuation sheet 34 and retained on the fixed bolt element 31 and the multiple movable bolts 32 individually, wherein the hollow pillar 342 has two opposite semicircular cutouts 3421, an arcuately concave channel 3422 defined on a center of each of the two opposite semicircular cutouts 3421, two release tabs 3423 arranged on two ends of the hollow pillar 342 respectively, and a lowest contact point 3424 formed on a center of the arcuately concave channel 3422, wherein an idle rotation angle 1 is defined among each of two sides of the arcuately concave channel 3422 and the lowest contact point 3424, and the arcuately concave channel 3422 has two symmetrical highest points 3425 forming on two ends thereof respectively, wherein an idle rotation height h1 is defined between each of the two symmetrical highest points 3425 and the lowest contact point 3424, a largest change of the idle rotation height h1 is within the idle rotation angle 1, and the idle rotation angle 1 is within 20 to 30 degrees. In a preferred embodiment, the idle rotation angle 1 is 25 degrees. Two symmetrical sliding channels 3426 are defined between the two release tabs 3423 of two ends of the arcuately concave channel 3422 and the two opposite semicircular cutouts 3421 respectively, the arcuately concave channel 3422 is coupled with the two symmetrical sliding channels 3426, and coefficients of spiral surfaces of the arcuately concave channel 3422 and the two sliding channels 3426 are different, wherein the arcuately concave channel 3422 is flat, and the two sliding channels 3426 are steep. The central shaft 33 partially extends out of the cover 20 via the aperture 341, the hollow pillar 342, and the returning spring 35 of the actuation sheet 34 so that the actuation sheet 34 and the returning spring 35 fit on the central shaft 33, the returning spring 35 abuts against the cover 20 and the actuation sheet 34, and the two opposite circular columns 331 of the central shaft 33 are biased against the arcuately concave channel 3422 of the hollow pillar 342 of the actuation sheet 34. The positioning disc 36 is fixed between the cover 20 and the fixing mount 10, and the positioning disc 36 has multiple orifices 361 defined adjacent to a peripheral side thereof and configured to accommodate the fixed bolt element 31 and the multiple movable bolts 32 individually.

[0042] The rotation member 40 is mounted on the cover 20 and includes a fitting trench 41 defined on a center of a bottom thereof so as to fit with the central shaft 33 of the locking device 30, and the rotation member 40 is locked with the central shaft 33 by using the screw 50 so as to drive the central shaft 33 of the locking device 30 to rotate.

[0043] In user, as shown in FIG. 8, the connection head A21 of each buckle A2 inserts into one of the plurality of grooves 12 of the fixing mount 10 so as to push the slidable block 131 of the elasticity set 13 to slide in the slot 14, when the connection head A21 of each buckle A2 is positioned after the resilient element 132 is pressed by the slidable block 131, the multiple movable bolts 32 of the locking device 30 move into and fix in the hole A211 of the connection head A21 of each buckle A2 after being pushed by the multiple sprigs 37, thus fastening each buckle A2 in the body A1.

[0044] When unfastening the seat belt A3, as shown in FIGS. 9-11, the rotation member 40 drives the central shaft 33 to revolve so that the two opposite circular columns 331 of the central shaft 33 rotatably slide to the two release tabs 3423 from the hollow pillar 342 of the actuation sheet 34 via the two sliding channels 3426, hence the actuation sheet 34 lifts to the cover 20 at an opening height h2, wherein the opening height h2 is more than the idle rotation height h1 so that the actuation sheet 34 forces the returning spring 35 to deform, actuates the multiple movable bolts 32 to lift, and presses the multiple sprigs 37, hence the multiple movable bolts 32 remove from the hole A211 of each buckle A2, the resilient element 132 of the elasticity set 13 pushes the slidable block 131 outwardly so that the slidable block 131 pushes each buckle A2 out of the one groove 12, thus unfastening each buckle A2 easily. Thereafter, the returning spring 35 and the multiple sprigs 37 push the actuation sheet 34 and the multiple movable bolts 32 back to original positions and drive the central shaft 33 and the rotation member 40 reversely to rotate back to original angle respectively.

[0045] Referring further to FIGS. 12-14, when each buckle A2 fastens in the body A1, the two opposite circular columns 331 of the central shaft 33 slides on the arcuately concave channel 3422 so that the rotation member 40 rotates within the idle rotation angle 1 of the arcuately concave channel 3422. Since the spiral surfaces of the arcuately concave channel 3422 is small and flat, the rotation member 40 moves at the idle rotation height h1 in the idle rotation angle 1, such that the central shaft 33 does not drive the actuation sheet 34 to actuate the multiple movable bolts 32 to lift and to remove from the hole A211 of each buckle A2. In other words, the rotation member 40 is not released within two symmetrical idle rotation angles 1 of the arcuately concave channel 3422 and the lowest contact point 3424 after being rotated by external force, thus enhancing using safety.

[0046] Accordingly, the buckle structure of the present invention has advantages as follows:

[0047] 1. After fastening each buckle A2 of the safety belt, the arcuately concave channel 3422 of the two opposite circular columns 331 of the central shaft 33 contacts with the arcuately concave channel 3422 of the hollow pillar 342 of the actuation sheet 34, wherein the arcuately concave channel 3422 has the two symmetrical idle rotation angles 1, the rotation member 40 moves slightly at the idle rotation height h1 within two symmetrical idle rotation angles 1, and the idle rotation height h1 is less than the opening height h2, so when the rotation member 40 is rotated by the external force to revolve within the two symmetrical idle rotation angles 1, each buckle A2 does not remove from the body A1, thus enhancing the using safety.

[0048] 2. The hollow pillar 342 of the actuation sheet 34 has the two opposite semicircular cutouts 3421, each semicircular cutout 3421 has the arcuately concave channel 3422 defined on the center thereof, the two release tabs 3423 are arranged on the two ends of the hollow pillar 342 respectively, the arcuately concave channel 3422 has the two symmetrical idle rotation angles 1, the two symmetrical sliding channels 3426 are defined between the two release tabs 3423 of the two ends of the arcuately concave channel 3422 and the two opposite semicircular cutouts 3421 respectively, hence as unfastening each buckle A2, the rotation member 40 drives the central shaft 33 to revolve, wherein the two opposite circular columns 331 of the central shaft 33 rotatably slide to the two release tabs 3423 from the arcuately concave channel 3422 via the two sliding channels 3426, thus reducing force of unfastening the buckle structure and avoiding blocking each buckle A2.

[0049] While various embodiments in accordance with the present invention have been shown and described, it is clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.