Lancing device utilizing tail handle to load and adjust depth

A lancing device utilizing a tail handle to load and adjust depth, comprising a shell, an ejection pin, and a tail handle;

• the shell is a pen shell structure of the lancing device, an ejection chamber is arranged inside the shell, and a lancing end face is provided at the front end of the shell;
• the ejection pin is an ejection component capable of installing a lancet, the ejection pin is located in the ejection chamber, an active impact surface is set at the rear of the ejection pin to adjust puncture depth, and the active impact surface is facing towards the front of the lancing device;
• the tail handle is a handle set at the tail of the lancing device to drive the ejection pin to be loaded;
• wherein the tail handle is sleeved and connected relative to the shell, the tail handle is configured to rotate relative to the shell in a circumferential direction of the lancing device, and the tail handle is configured to slide relative to the shell in an axial direction of the lancing device at the same time;
• between the tail handle and the shell, one of the tail handle and the shell is equipped with an axial limit surface, the other of the tail handle and the shell is equipped with a limit action part, and the axial limit surface is configured to contact the limit action part to limit the position of the tail handle relative to the shell to slide forward in an axial direction;
• a passive impact surface is arranged corresponding to the active impact surface for both adjusting puncture depth and loading, the passive impact surface is directly or indirectly formed by a spiral action surface on the tail handle, rotating the tail handle is configured to change the position of the impact point on the passive impact surface in the axial direction of the lancing device;
• in a use state, when the tail handle is rotated, the tail handle drives the position of the impact point on the passive impact surface to change in the axial direction of the lancing device, thereby changing the distance between the lancing end face and the impact point on the passive impact surface in the axial direction of the lancing device, thereby adjusting the lancet tip puncture depth;
• when the tail handle is pulled backward, the tail handle forces the passive impact surface to contact the active impact surface at the rear of the ejection pin, and drives the ejection pin to move backward relative to the shell, until the ejection pin is loaded and locked;
• the tail handle is designed to form a composite mating section with a housing of the shell, and at the composite mating section, one of the tail handle and the housing is provided with a plurality of guide grooves, and the other of the tail handle and the housing is provided with a guide block;
• a length direction of the plurality of guide grooves is parallel to the axial direction of the lancing device, each guide groove of the plurality of guide grooves is spaced apart from each other along the circumferential direction of the lancing device;
• at the composite mating section, the guide block and the plurality of guide grooves are configured to have a non-mating working state and a mating working state;
• in the non-mating working state, the guide block and the plurality of guide grooves are staggered in the axial direction of the lancing device, such that the tail handle rotates relative to the housing in the circumferential direction of the landing device, and
• in the mating working state, the guide block and the plurality of guide grooves overlap each other in the axial direction of the lancing device, such that the tail handle slides relative to the housing in the axial direction of the lancing device.