Loop Takers TRIZ Cases
- Full-Rotation Hook Air-Layer Structure for Wear-Free Sewing
Compressed air between the hook track surfaces cuts friction and seizure, improving durability and keeping sewing threads oil-free.
- Lower Thread Tension Control Device Electromagnetic Actuation
Electromagnet rotates magnetic support member to press thread tensioning spring against bobbin case for precise lower thread tension control.
- Horizontal Rotary Hook Magnet Plate Friction Fixation
Differential friction between magnet plate and outer hook stabilizes magnet position without protrusions, preventing thread entanglement.
- Cylindrical Spring Bobbin for Double Backstitch Sewing Machine
Replacing truncated cone springs with a cylindrical helical design resolves the contradiction between uniform braking torque and extended spool movement.
- Sewing Machine Gripper Bobbin Braking and Ejection Mechanism
A gripper bobbin uses separate brake and ejection springs to secure the spool and allow easy removal.
- Sewing Machine Tension Spring Curved Contact for Stable Bobbin Thread
Curved tension spring endpoint positions pressure at tangency to stabilize bobbin thread.
- Bobbin With Thread End Housing Gap
A bobbin design integrates a gap between the outer flange and main body to securely house thread ends without deformation.
- Vertical Full Rotation Shuttle Spring Biasing
Leaf spring biases bobbin case engaging strip to restrict mechanical vibration, maintaining consistent thread tension and preventing breakage.
- Multi-Component Slide for Lockstitch Sewing Machine Bobbin Case
A multi-component slide system integrates a separate claw with the main body to ensure uninterrupted needle thread passage in lockstitch sewing machines.
- Vertical Full-Rotation Shuttle Thread Escape Recess
A vertical full-rotation shuttle incorporates a radial thread escape recess to guide lower thread accumulation.
- Horizontal Rotary Hook Beak Attachment Segmentation
Segmenting the beak from the rotating hook prevents thread entanglement and reduces size while maintaining attachment reliability.
- Sewing Machine Gripper Assembly with Alternating Drive Cams
Alternating drive cams rotate the sewing machine hook while a conical track releases jammed thread to prevent friction and improve stitch quality.
- Sewing Looper Positioning via Conical Set Bolt and V-Groove
A sewing looper uses a conical set bolt engaging a V-shaped groove on the rotation shaft to achieve precise axial positioning.
- Horizontal Rotary Hook Magnet Fixation via Rotation Stopper
A horizontal rotary hook secures a permanent magnet using an inward rotation stopper and shaft hole mounting.
- Sewing Machine Gripper System Three-Dimensional Control Curve
A sewing machine gripper system uses a three-dimensional control curve to guide capsule fan movement.
- Sewing Machine Hook Bobbin Sliding Bearing Friction Control
A sliding bearing between the locking lever and spool flange stabilizes friction conditions during bobbin rotation.
- Sewing Machine Hook System Noise Reduction via Fan Lever Pivoting
Pivoting the fan lever before impact stops the holding web at low speed, eliminating noise from coil capsule striking the stationary cam.