Microneedle unit and injection device
First Claim
1. A microneedle unit comprising:
- a first divisional element including a first divisional element main body, a plurality of microneedle part first elements protruding from one side of the first divisional element main body, at least one medicinal solution supply needle part first element protruding from another side of the first divisional element main body opposite to the one side thereof and having a number less than a number of the plurality of microneedle part first elements, microneedle side flow channels respectively formed in the plurality of microneedle part first elements, at least one medicinal solution supply needle side flow channel formed in the at least one medicinal solution supply needle part first element, and communication path elements communicating the microneedle side flow channels and the at least one medicinal solution supply needle side flow channel; and
a second divisional element attached to the first divisional element, and including a second divisional element main body, a plurality of microneedle part second elements protruding from one side of the second divisional element main body, and at least one medicinal solution supply needle part second element protruding from another side of the second divisional element main body opposite to the one side thereof and having a number less than a number of the plurality of microneedle part second elements,wherein the second divisional element covers the microneedle side flow channels, the at least one medicinal solution supply needle side flow channel, and the communication path elements such that a part of each of the microneedle side flow channels forms a first horizontally-opening hole as a medicinal solution outlet and a part of the at least one medicinal solution supply needle side flow channel forms a second horizontally-opening hole as a medicinal solution inlet, andthe second divisional element is bonded on the first divisional element such that the plurality of microneedle part first elements, the microneedle side flow channels, and the plurality of microneedle part second elements respectively form a plurality of microneedles, and the at least one medicinal solution supply needle part first element, the at least one medicinal solution supply needle side flow channel, and the at least one medicinal solution supply needle part second element form at least one medicinal solution supply needle having a number less than a number of the plurality of microneedles.
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Accused Products
Abstract
The purpose of the present invention is to provide a micro-needle unit and an injection device capable of being readily connected to a liquid supply source and capable of performing an effective injection via a simple configuration. The micro-needle unit is provided with a plurality of micro-needles disposed on the puncturing side and provided with a flow channel, and drug solution supply needles disposed on the side opposite from the puncturing side in a number less than that of the micro-needles and provided with a flow channel in communication with the aforementioned flow channel, the micro-needle unit thereby being capable of being readily connected to a liquid supply source and capable of performing an effective injection via a simple configuration.
3 Citations
25 Claims
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1. A microneedle unit comprising:
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a first divisional element including a first divisional element main body, a plurality of microneedle part first elements protruding from one side of the first divisional element main body, at least one medicinal solution supply needle part first element protruding from another side of the first divisional element main body opposite to the one side thereof and having a number less than a number of the plurality of microneedle part first elements, microneedle side flow channels respectively formed in the plurality of microneedle part first elements, at least one medicinal solution supply needle side flow channel formed in the at least one medicinal solution supply needle part first element, and communication path elements communicating the microneedle side flow channels and the at least one medicinal solution supply needle side flow channel; and a second divisional element attached to the first divisional element, and including a second divisional element main body, a plurality of microneedle part second elements protruding from one side of the second divisional element main body, and at least one medicinal solution supply needle part second element protruding from another side of the second divisional element main body opposite to the one side thereof and having a number less than a number of the plurality of microneedle part second elements, wherein the second divisional element covers the microneedle side flow channels, the at least one medicinal solution supply needle side flow channel, and the communication path elements such that a part of each of the microneedle side flow channels forms a first horizontally-opening hole as a medicinal solution outlet and a part of the at least one medicinal solution supply needle side flow channel forms a second horizontally-opening hole as a medicinal solution inlet, and the second divisional element is bonded on the first divisional element such that the plurality of microneedle part first elements, the microneedle side flow channels, and the plurality of microneedle part second elements respectively form a plurality of microneedles, and the at least one medicinal solution supply needle part first element, the at least one medicinal solution supply needle side flow channel, and the at least one medicinal solution supply needle part second element form at least one medicinal solution supply needle having a number less than a number of the plurality of microneedles. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification