Office Chair Design Part Two

"Office Chair Design Using ZW3D (Part Two)" mainly focuses on the design of the chair back and armrests, covering the specific operational procedures for the chair frame, mesh fabric, and armrests, and supplementing with cases of intelligent and humanized design trends.

I. Chair Frame Design Process

1. Assembly Positioning: Use the "Insert" command on the assembly page to position the chair frame component at the 0 coordinate and fix the component. Edit component parameters by double-clicking the assembly tree.
2. Path Drawing and Extrusion:
   • YZ Work Plane: Draw a straight-line sketch (with 10mm protrusions at both ends) and symmetrically extrude it by 300mm. If the surface direction is incorrect, adjust it by using the "Reverse Surface Direction" command or redefining the extrusion command (checking the "Reverse Face Direction" option).
   • XY/XZ Work Plane: Repeat the process of drawing sketches and extruding them, extract the intersection lines with the previous surfaces, and hide redundant auxiliary surfaces.
   • Straight-Line Extrusion: Draw two straight lines and extrude them, extract the intersection lines again, and finally hide all auxiliary surfaces.
3. Profile Sweep and Post-Processing:
   • Create a new work plane and draw a sketch. After hiding the auxiliary plane, use the "Sweep" command to generate the chair frame solid with the sketch as the profile and the curve list as the path.
   • Round the edges (5mm) and set the thickness to -2mm using the "Shell" command to complete the main design of the chair frame.

II. Mesh Fabric Design Process

1. Assembly and Merging: Insert the mesh fabric component and fix it at the 0 coordinate. After editing the assembly tree, insert the chair frame component, merge geometric objects, and delete the internal surfaces of the solid (including rounded surfaces) to form the edges of the mesh fabric.
2. Surface Completion:
   • Use the "Ruled Surface" command to complete the front and back surfaces of the mesh fabric.
   • Complete the enclosure of the remaining four surfaces using the "N-Sided Surface" command to form a complete mesh fabric structure.

III. Armrest Design (Partial Process)

Insert the armrest component and fix it at the 0 coordinate, then edit the assembly tree. The subsequent path design steps are not fully demonstrated in the tutorial and need to be supplemented based on actual requirements.

IV. Design Trends and Innovative Cases

1. Intelligent Integration: For example, an integrated office chair that combines posture correction, mobility, and fitness features, incorporating intelligent sensing technology and mechatronic drive to dynamically adjust the seat angle and backrest support, and equipped with adjustable pedals, elastic bands, and other fitness components.
2. Humanized Functions: Emphasizing chair backs, seat cushions, and armrests that conform to the human body's curves, supporting height/angle adjustments, lumbar support, and other functions (such as the Komfort chair and Natick office chair).
3. High-End Function Expansion: Some models are equipped with massage and seat heating functions, using mechanical rolling force to relieve muscle fatigue and enhance comfort.

The above process comprehensively covers the core design steps for the chair back and armrests in the ZW3D tutorial and provides functional innovation references based on industry trends.