1. A jointed mechanism of an electric wheelchair, the jointed mechanism comprising:
a main chassis assembly, supporting the electric wheelchair;
two drive wheel assemblies, providing a motive force for moving the electric wheelchair;
two rear caster assemblies, pivotally fixed to the drive wheel assemblies, and bushed to the main chassis assembly by pivot arm plate assemblies; and
two front caster assemblies, bushed to the main chassis assembly and the rear caster assemblies to construct a four-bar linkage.
2. The jointed mechanism as claimed in claim 1, wherein each of the front caster assemblies comprises a front caster anti-tip wheel, a caster wheel fork and a front caster arm; each of the rear caster assemblies comprises a rear caster wheel, a caster wheel fork and a rear caster arm; and each of the drive wheel assemblies comprises a drive wheel and a motorgearboxbrake assembly, and wherein the front caster assemblies are bushed to the main chassis assembly at the front caster arms; the rear caster assemblies are pivotally attached to the main chassis assembly at the rear caster arms; the front caster arms and the rear caster arms are hinged to each other; the and motorgearboxbrake assemblies are mounted to the rear caster arms.
3. The jointed mechanism as claimed in claim 2, wherein each of the front caster arms comprises a straight part, which is backward extended, and a angled part, which is extended from the straight part and bent downward; each of the rear caster arms comprises a straight part and two angled parts extended from opposite ends of the straight part and bent downward, and wherein the front caster arms and the rear caster arms are hinged to each other at the ends of the angled parts and are bushed to the main chassis assembly at the straight parts.
4. The jointed mechanism as claimed in claim 3, wherein the straight parts of the front caster arms and the straight parts of the rear caster arms comprise pivot arm bushing assemblies, respectively; the angled parts of the front caster arms and the angled parts of the rear caster arms comprise hinged apertures at ends thereof, respectively; and the main chassis assembly comprises two front caster arm axles and two rear caster arm axles, and wherein the front caster arm axles are received in the pivot arm bushing assemblies on the straight parts of the front caster arms; the rear caster arm axles are received in the lower ends of the pivot arm plate assemblies; and the upper ends of the pivot arm plate assemblies are bushed to the pivot arm bushing assemblies on the straight parts of rear caster arms.
5. The jointed mechanism as claimed in claim 4, wherein each of the pivot arm plate assemblies comprises a pivot arm having bushing apertures corresponding to the pivot arm bushing assembly of the rear caster arm and the rear caster arm axle at two ends.
6. The jointed mechanism as claimed in claim 3, wherein each of the straight parts of the rear caster arms further comprises a motorgearboxbrake assembly mounting plate for mounting the drive wheel and the motorgearboxbrake assembly of the drive wheel assembly under the straight parts of the rear caster arms.
7. The jointed mechanism as claimed in claim 4, wherein the pivot arm bushing assemblies are located on top of the straight parts of the front caster arms and the rear caster arms.
8. The jointed mechanism as claimed in claim 3, wherein the straight parts of the rear caster arms are specifically higher than the straight parts of the front caster arms with a predetermined distance therebetween.
9. The jointed mechanism as claimed in claim 4, wherein each of the pivot arm plate assemblies comprises two angled plates and a horizontal tube connecting the angled plates to form a U-shaped configuration, wherein the bushing apertures at the ends of the angled plates are for the pivot arm bushing assembly on the straight part of rear caster arm and bushed by an axle assembly; the rear caster arm axle is received in the horizontal tube assembled to the main chassis assembly.
10. The jointed mechanism as claimed in claim 9, wherein each of the straight parts of the rear caster arms further comprises a motorgearboxbrake assembly mounting plate for mounting the drive wheel and the motorgearboxbrake assembly of the drive wheel assembly under the straight parts of the rear caster arms respectively.
11. The jointed mechanism as claimed in claim 9, wherein the pivot arm bushing assemblies are located on the top of the straight parts of the front caster arms and the rear caster arms.
12. The jointed mechanism as claimed in claim 9, wherein the straight parts of the rear caster arms are higher than the straight parts of the front caster arms with a predetermined distance therebetween.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A slim bezel liquid crystal display device, comprising a rear enclosure, a front enclosure mating the rear enclosure, and a liquid crystal display module arranged inside the rear enclosure, the rear enclosure forming a retention plate, the retention plate functioning to retain a lower end of the liquid crystal display module so as to fix the liquid crystal display module in the rear enclosure.
2. The slim bezel liquid crystal display device as claimed in claim 1, wherein the rear enclosure comprises a bottom board, first and second side boards respectively connected to opposite sides of the bottom board, and a third side board connected to the bottom board and also connected to the first and second side boards, the bottom board and the first, second, and third side boards delimiting an accommodation space that has an opening, the liquid crystal display module being received in the accommodation space.
3. The slim bezel liquid crystal display device as claimed in claim 2, wherein the retention plate is made in the form of an inverted L-shape and is mounted to the bottom board at a location close to the third side board.
4. The slim bezel liquid crystal display device as claimed in claim 3, wherein the retention plate comprises a bearing section that is perpendicularly mounted to the bottom board and a retention section that is perpendicularly connected to a free end of the bearing section, the bearing section, the retention section, and the bottom board collectively defining a retention slot, the retention slot receiving a lower end of the liquid crystal display module therein.
5. The slim bezel liquid crystal display device as claimed in claim 4, wherein the bearing section, the bottom board, and the first, second, and third side boards are integrally formed with each other.
6. The slim bezel liquid crystal display device as claimed in claim 4, wherein the bearing section, the bottom board, and the first, second, and third side boards collectively define a receiving compartment for receiving and retaining therein cables.
7. The slim bezel liquid crystal display device as claimed in claim 2, wherein the front enclosure comprises a frame body and a stop plate extending from one side of the frame body, the stop plate being provided to correspond to the opening of the rear enclosure, whereby after assembling, the stop plate completely covers and shields the opening.
8. The slim bezel liquid crystal display device as claimed in claim 7, wherein the frame body and the stop plate are integrally formed with each other.
9. The slim bezel liquid crystal display device as claimed in claim 1, wherein the liquid crystal display module comprises a back frame, a liquid crystal display panel received in the back frame, and a backlight module.
10. A slim bezel liquid crystal display device, comprising a rear enclosure, a front enclosure mating the rear enclosure, and a liquid crystal display module arranged inside the rear enclosure, the rear enclosure forming a retention plate, the retention plate functioning to retain a lower end of the liquid crystal display module so as to fix the liquid crystal display module in the rear enclosure;
wherein the rear enclosure comprises a bottom board, first and second side boards respectively connected to opposite sides of the bottom board, and a third side board connected to the bottom board and also connected to the first and second side boards, the bottom board and the first, second, and third side boards delimiting an accommodation space that has an opening, the liquid crystal display module being received in the accommodation space;
wherein the retention plate is made in the form of an inverted L-shape and is mounted to the bottom board at a location close to the third side board;
wherein the retention plate comprises a bearing section that is perpendicularly mounted to the bottom board and a retention section that is perpendicularly connected to a free end of the bearing section, the bearing section, the retention section, and the bottom board collectively defining a retention slot, the retention slot receiving a lower end of the liquid crystal display module therein;
wherein the bearing section, the bottom board, and the first, second, and third side boards are integrally formed with each other;
wherein the bearing section, the bottom board, and the first, second, and third side boards collectively define a receiving compartment for receiving and retaining therein cables;
wherein the front enclosure comprises a frame body and a stop plate extending from one side of the frame body, the stop plate being provided to correspond to the opening of the rear enclosure, whereby after assembling, the stop plate completely covers and shields the opening;
wherein the frame body and the stop plate are integrally formed with each other; and
wherein the liquid crystal display module comprises a back frame, a liquid crystal display panel received in the back frame, and a backlight module.