Disposable lancet device
First Claim
1. A disposable lancet device comprising:
- a casing being a hollow elongated hexahedron and comprising a front end having an opening being circular;
an open rear end;
a top having a through hole formed toward the open rear end;
a bottom having a through hole corresponding to the through hole in the top;
two inner side surfaces facing each other; and
two inner linear surfaces facing each other, being between the inner side surfaces, extending from the open rear end to the front end and converging as they approach the front end, and each inner linear surface having a front longitudinal surface connected to the front end of the casing;
a rear longitudinal surface connected to the open rear end of the casing;
a middle longitudinal surface formed between the front and rear longitudinal surfaces;
a shoulder formed between the rear longitudinal surface and the middle longitudinal surface; and
an inclined limit formed between the middle longitudinal surface and the front longitudinal surface; and
a lancet assembly being a shaft-like assembly, being mounted in the casing through the open rear end and having a longitudinal hub having a top;
a bottom;
two sides;
a front end;
a rear end;
a needle being mounted in and protruding coaxially from the front end of the longitudinal hub;
a post being formed on and extending coaxially from the rear end of the longitudinal hub; and
two resilient tabs being formed respectively on the top and bottom of the longitudinal hub at the rear end, extending toward the front end of the longitudinal hub and diverging from each other, and each resilient tab having a front edge;
a spring being mounted around the post of the longitudinal hub of the lancet assembly, pressing against the rear end of the longitudinal hub and having a front end; and
a rear end; and
an actuator mounted slidably in the rear end of the casing and around the rear end of the longitudinal hub to compress the spring and having a pushbutton assembly being mounted slidably in the open rear end of the casing and having a cylindrical body being hollow to hold the rear end of the spring and having an open front end mounted around the spring; and
a closed rear end protruding from the open rear end of the casing; and
two mounting keys formed at and protruding out from the front end of the cylindrical body, slidably mounted between the inner side surfaces of the casing and slidably pressing respectively against the rear longitudinal surfaces of the inner linear surfaces, each mounting key having a front outer edge; and
two actuating tabs being formed at and extending longitudinally respectively from the front outer edges of the mounting keys and slidably mounted respectively against the rear longitudinal surfaces of the inner linear surfaces of the casing, and each actuating tab having an outer surface slidably mounted against one of the rear longitudinal surfaces of the inner linear surfaces; and
a latch being wedge shaped, formed on the outer surface, engaging a corresponding one of the through holes in the casing to hold the lancet assembly in the casing and disengaging from the through hole when the actuator is pressed into the casing.
1 Assignment
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Accused Products
Abstract
The disposable lancet device has a casing, a lancet assembly, a spring and an actuator is provided. The casing is hollow and has a front end, an open rear end, two inner side surfaces and two converging inner linear surfaces. Each inner linear surface has a shoulder and an inclined limit. The lancet assembly is mounted slidably in the casing and has a longitudinal hub with two resilient tabs that abut the shoulders and a needle cap. The spring presses against the longitudinal hub. The actuator presses against the spring and has a pushbutton assembly and two actuating tabs that press against and release the resilient tabs from the shoulders. The needle is retracted by the resilient tabs pressing against the inclined limits. Therefore, the used needle will not protrude from the casing to prick a user cannot be used again.
131 Citations
5 Claims
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1. A disposable lancet device comprising:
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a casing being a hollow elongated hexahedron and comprising a front end having an opening being circular;
an open rear end;
a top having a through hole formed toward the open rear end;
a bottom having a through hole corresponding to the through hole in the top;
two inner side surfaces facing each other; and
two inner linear surfaces facing each other, being between the inner side surfaces, extending from the open rear end to the front end and converging as they approach the front end, and each inner linear surface having a front longitudinal surface connected to the front end of the casing;
a rear longitudinal surface connected to the open rear end of the casing;
a middle longitudinal surface formed between the front and rear longitudinal surfaces;
a shoulder formed between the rear longitudinal surface and the middle longitudinal surface; and
an inclined limit formed between the middle longitudinal surface and the front longitudinal surface; and
a lancet assembly being a shaft-like assembly, being mounted in the casing through the open rear end and having a longitudinal hub having a top;
a bottom;
two sides;
a front end;
a rear end;
a needle being mounted in and protruding coaxially from the front end of the longitudinal hub;
a post being formed on and extending coaxially from the rear end of the longitudinal hub; and
two resilient tabs being formed respectively on the top and bottom of the longitudinal hub at the rear end, extending toward the front end of the longitudinal hub and diverging from each other, and each resilient tab having a front edge;
a spring being mounted around the post of the longitudinal hub of the lancet assembly, pressing against the rear end of the longitudinal hub and having a front end; and
a rear end; and
an actuator mounted slidably in the rear end of the casing and around the rear end of the longitudinal hub to compress the spring and having a pushbutton assembly being mounted slidably in the open rear end of the casing and having a cylindrical body being hollow to hold the rear end of the spring and having an open front end mounted around the spring; and
a closed rear end protruding from the open rear end of the casing; and
two mounting keys formed at and protruding out from the front end of the cylindrical body, slidably mounted between the inner side surfaces of the casing and slidably pressing respectively against the rear longitudinal surfaces of the inner linear surfaces, each mounting key having a front outer edge; and
two actuating tabs being formed at and extending longitudinally respectively from the front outer edges of the mounting keys and slidably mounted respectively against the rear longitudinal surfaces of the inner linear surfaces of the casing, and each actuating tab having an outer surface slidably mounted against one of the rear longitudinal surfaces of the inner linear surfaces; and
a latch being wedge shaped, formed on the outer surface, engaging a corresponding one of the through holes in the casing to hold the lancet assembly in the casing and disengaging from the through hole when the actuator is pressed into the casing. - View Dependent Claims (2, 3, 4, 5)
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Specification