The present invention relates to the technical field of sewing, and, in particular, a vertical shuttle
bed inner shuttle, comprising an inner shuttle, a shuttle
bobbin case with a bottom-thread outer end check, a spring piece, and a
bobbin with a bottom-thread inner end clamping function. The inner shuttle integrates the shuttle
bobbin case and the bobbin, the bobbin is connected to a coreless bottom thread core, and the shuttle bobbin case with the bottom-thread outer end check is connected to the side wall of the inner shuttle. In the present invention, the shuttle bobbin case with the bottom-thread outer end check is directly designed on the inner shuttle, and the spring piece is designed to provide adjustable thread release damping. The bobbin with the bottom-thread inner end clamping function is designed to
mount the coreless bottom thread core, and under the fastening action of a fixing screw, the spring piece provides essential damping to the bobbin, preventing excessive thread release caused by sewing vibrations and thread release
inertia. When a bottom thread is depleted, sewing can be resumed by simply loading a new bottom thread core onto the bobbin, and the thread core usage status and remaining amount can be directly visually monitored from the end face, thus simplifying the steps of vertical shuttle
bed bobbin core replacement, such that sewing can be resumed simply with a single action of loading the thread core, making the device more convenient to use.