Pressure reduction mechanism, puncture device, blood analysis device, and sensor mounting mechanism
First Claim
1. A puncturing apparatus comprising:
- a housing;
a puncturing section that is provided in the housing and punctures skin;
a puncturing mechanism that operates the puncturing section;
a cylinder having a bottom;
a piston having a first end part projecting from the bottom and a second end part that is located in the cylinder and slides along an axis of the cylinder;
a first sealing section that seals between the bottom and an outer surface of the piston;
a second sealing section that seals between the second end part and an inner surface of the cylinder;
a third sealing section that is located in a joint between the piston and the puncturing mechanism and seals between a hollow space opening in the first end part and the puncturing mechanism; and
an air chamber that is sealed with the first and second sealing sections and surrounded by the outer surface of the piston and the inner surface of the cylinder, wherein the piston has a connection hole that connects the air chamber with the hollow space.
6 Assignments
0 Petitions
Accused Products
Abstract
Provided are a decompression mechanism capable of performing a desired pressure reduction by simple operation and having improved operability, a puncture device, a blood analysis device, and a sensor mounting mechanism. A needle puncturing device (100) is provided with: a piston (121) having at one end thereof an end part (121a) for forming a part of a sensor mounting mechanism (130) and at the other end an end part (121b) for slidably supporting a rod (112) of a lancet section (111); a cylinder (122) for slidably containing therein the end section (121b) of the piston (121); and packing (125) mounted to the inner periphery of the end part (121b) of the piston (121) and maintaining the air-tightness of the outer periphery of the rod (112). When the piston (121) is moved in the direction toward the cylinder (122) with a skin contact part (131) in contact with the skin, the volumes of an internal space (140) and a pressure reduction chamber (150) which are sealed by packing (123, 124) are increased to produce a reduced pressure.
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Citations
12 Claims
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1. A puncturing apparatus comprising:
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a housing; a puncturing section that is provided in the housing and punctures skin; a puncturing mechanism that operates the puncturing section; a cylinder having a bottom; a piston having a first end part projecting from the bottom and a second end part that is located in the cylinder and slides along an axis of the cylinder; a first sealing section that seals between the bottom and an outer surface of the piston; a second sealing section that seals between the second end part and an inner surface of the cylinder; a third sealing section that is located in a joint between the piston and the puncturing mechanism and seals between a hollow space opening in the first end part and the puncturing mechanism; and an air chamber that is sealed with the first and second sealing sections and surrounded by the outer surface of the piston and the inner surface of the cylinder, wherein the piston has a connection hole that connects the air chamber with the hollow space. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification