Flexible Nozzle Applicator for Wide-Range Liquid Delivery
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Solution Overview
Problem
Existing applicators for injecting mixed liquids into body cavities during surgeries, such as laparoscopic procedures, face challenges in applying the mixture over a wide range due to directional limitations and excessive abdominal pressure increases caused by expelled gas.
Innovation Solution
The design incorporates a nozzle with a curved section and an outer tube that allows for adjustable alignment and a gas discharge path to prevent excessive pressure, enabling the applicator to apply liquids or powders over a wide area while managing gas flow to maintain stable body cavity pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the nozzle is inserted into the body cavity via a trochal tube with the nozzle facing in the inserting direction, then the applicator can be easily inserted, but the mixed liquid cannot be applied over a wide range as it can only be expelled in one direction
Solution Approach 1:
The nozzle main body is designed with a curved section that can be elastically deformed to change the facing direction of the nozzle head. By applying external force to the curved section, the nozzle head can be oriented in multiple directions while maintaining the same insertion path through the trochal tube, thus resolving the contradiction between ease of insertion and application range.
2Volume of stationary object
If aseptic gas is supplied into the abdominal cavity via the trochal tube to expand the abdominal cavity, then the abdominal cavity is expanded for surgery, but the gas abdominal pressure rises excessively when mixed liquid together with the gas is expelled from the nozzle
Solution Approach 1:
The gas discharge path is designed as a separate channel that extracts gas from the abdominal cavity independently of the liquid injection path. This allows excess gas to be removed while maintaining the beneficial cavity expansion, resolving the contradiction between sufficient cavity volume and excessive pressure buildup.
3Adaptability or versatility
If the nozzle main body has a curved section that can be deformed to change facing direction, then the liquid can be applied over a wide range, but the structure becomes more complex
Solution Approach 1:
The nozzle main body incorporates a curved section made of flexible material that can be elastically deformed. This flexible structure allows the nozzle head to change facing direction without requiring complex mechanical joints or multiple rigid components, thus achieving multi-directional application capability while keeping the overall structure relatively simple.
Data Source
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AI summary
An applicator which is used by being inserted into a living body includes: a nozzle which has a longer nozzle main body, and a nozzle head, which is provided on a front end side of the nozzle main body and through which liquid together with gas is expelled, with a curved section, which is curved or bent and has flexibility, being formed on the front end portion of the nozzle main body; and an outer tube through which the nozzle main body is inserted so as to be movable along a longitudinal direction thereof and a curve angle of the curved section is changed by inserting the curved section, thereby adjusting a direction of the nozzle head relative to an axis of the nozzle main body, wherein a gap is formed along the longitudinal direction between the outer tube and the nozzle, and wherein the gap functions as a discharge path for discharging the gas within the body cavity via the gap to the outside of the body when the body pressure within the body cavity rises.