A buckle locking device for a tonneau cover of a pick-up truck (II), comprising:
- a load-bearing cross bar (1), a slider (2), a handle (3), a buckle block (4), a slide fixing block (5), a T-bar (6), and an extruded aluminum frame (7),
- wherein the handle is a long bar extending downward to a hand holding portion, wherein a U-shape sliding chute is provided at a top end of the handle,
- wherein each of a left side and a right side of the U-shape sliding chute (302) is formed with a U-shape slide-way,
- wherein the buckle block (4) is a rectangular block, wherein a buckling groove (401) is provided on one side of the buckle block,
- wherein one side of the buckling groove is formed with a hook portion (402),
- wherein the other side of the buckling groove has a platform (204), wherein a center part of the buckling groove has a round bore (403),
- wherein the buckle block (4) is held inside a center groove (201) of the slider (2), so as to slide to and fro freely inside the center groove (201) of the slider (2),
- wherein slide fixing block (5) is a rectangular block, wherein a center part of the slide fixing block (5) has a hole,
- wherein the periphery of the hole is formed with an embedding portion,
- wherein a sliding rail (502) is provided on each of left and right sides of the slide fixing block (5),
- wherein the sliding rail is embedded inside a C-shape sliding chute (202) of the slider, so as to slide to and fro freely inside the C-shape sliding chute of the slider,
- wherein the T-bar is in the shape of the letter T,
- wherein a top part of the T-bar has a T-shape head portion,
- wherein a rod portion (602) is provided at a lower end of the T-bar,
- wherein, at the rod portion, there is a threaded portion,
- wherein each of left and right sides of the T-shape head portion has a pulley portion,
- wherein the pulley portion is embedded inside the C-shape sliding chute of the slider, so as to slide to and fro freely inside the C-shape sliding chute of the slider,
- wherein the extruded aluminum frame is a long bar-shaped aluminum extrusion, wherein one side of the extruded aluminum frame has a C-shape groove portion,
- wherein the C-shape groove portion is coupled with a front end fixing platform of the slider to form an integral body and is fixed together with a screw,
- wherein the load-bearing cross bar is a long T-shaped aluminum extrusion, wherein a center part of the load-bearing cross bar has a lug portion,
- wherein a center of the lug portion is formed with a hollow chute,
- wherein each of two sides of the lug portion has a supporting portion,
- wherein the slider is a long bar-shaped aluminum extrusion, wherein the center groove (201) is formed in a center part of the slider (204),
- wherein a square groove (203) is formed at each of left and right sides of the center groove (201),
- wherein, the C-shape sliding chute (202) is formed over the square groove (203),
- wherein, a front end fixing platform (205) is provided over the C-shape sliding chute (202) and at the front end of the slider (2),
- wherein, at a rear end of the slider (2), there is a rear end fixing platform (206),
- wherein the rear end fixing platform (206) is provided for placement of a supporting portion on one side of the load-bearing cross bar (1),
- wherein a screw combines the slider (2) and the load-beating cross bar (1),
- wherein the front end fixing platform (205) includes a left front end fixing platform and a right front end fixing platform, wherein a left platform protruding in a left direction is provided over the left front end fixing platform, wherein a right platform protruding in a right direction is provided over the right front end fixing platform,
- wherein, when the handle drives the buckle block to complete the buckling, the handle pulls the T-bar, drives the buckle block to be caught on a flange portion of a sidewall of a truck bed, and generates a downward pulling force,
- wherein the pulling force is transmitted by the slider to the load-bearing cross bar,
- wherein the load-bearing cross bar presses the extruded aluminum frame (7),
- wherein a tonneau cover frame made up of a plurality of extruded aluminum frames automatically generates a downward pressure, so that the tonneau cover frame is covered on the truck bed tightly.