JPS6111108B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a valve structure of a capsule for collecting a sample in a living body.

Previously, the first prototype of the capsule valve structure was
There is a method of attaching a backflow prevention valve to the sampling port as shown in the figure. This method uses a space 6 that is created when the outer cylinder 2 moves in the direction A with the force of the push spring 3 relative to the main body 1.
The negative pressure caused by the change in volume causes the external liquid to be sucked in against the valve consisting of a check valve 4 and a leaf spring 5 that presses the check valve 4 into close contact with each other. In such a structure, the external pressure, the force of the leaf spring 5, and the internal pressure are the vector summation, and sampling ends in a zero state, but as a result, the seal is broken due to small changes in the external pressure. In addition, since the sampling port is only in a small gap, the sampling efficiency is very poor.

The present invention was made in order to eliminate the above-mentioned drawbacks, and was made in order to increase the size of the sampling port during sampling and to improve the sealing of the valve when sampling is completed.

Hereinafter, the present invention will be explained in detail with reference to FIG.

FIG. 2 is a sectional view of a capsule showing one embodiment. This embodiment is a collection capsule equipped with a separation mechanism, so that the part provided with the device for receiving external commands and the collection part are separated during operation. Although the part equipped with a device for receiving an external command and the separation mechanism are not directly related to the present invention and will not be described, the filament 7 is heated by an external command and the thread 8 is melted and cut. It will be added later that the sampling operation section is separated by a separation mechanism. The sample collection portion includes a collection frame 10 that is connected to the frame 9 by light press fitting, a collection cylinder 11 that is slidably fitted to the collection frame 10, and a collection cylinder 11 that is screwed into the collection frame 10 and has a gap with respect to the collection cylinder. A push spring 13 that pushes the recovery tube 11 in the direction of arrow A against the recovered outer tube 12 and recovery frame 10, a thread presser 14 screwed into the recovery tube 11, and a press fit into the recovery tube 11 enough to withstand the force of the spring 15. The valve 16 is made up of a In operation, when the thread 8 is fused and cut, the recovery frame 10 is separated from the frame 9, and at the same time, the recovery cylinder 11 is moved relative to the recovery frame 10 by the force of the push spring 13. Therefore, the space 17 between the collection frame 10 and the collection cylinder 11 undergoes a volume change, and the negative pressure generated thereby causes the external liquid to be sucked through the collection port 10a.
On the other hand, the valve 16 moves in the direction of arrow A together with the collection tube 11, but finally the end surface 16a of the valve comes into contact with the outer tube end surface 12a, and the force of the push spring 13 pushes the collection tube
1 and the press-fitted parts of valve 16 are removed. Then, the force of the spring 15 moves the valve 16 in the direction of the arrow to seal the sampling port 10a.

As described above, it is possible to create a mechanism in which the valve moves away from the sampling port during the sampling operation and seals the sampling port after the operation is completed, but as a result, the sampling efficiency (actual sampling amount relative to the calculated sampling amount) can be achieved at over 90%. At the same time, the valve spring force can be strengthened against external pressure fluctuations, making it possible to maintain a tight seal. There are effects such as

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a conventional system, and FIG. 2 is a sectional view of an embodiment. 6... filament, 8... thread, 13... push spring, 23... recovery frame, 24... recovery tube,
25...outer cylinder, 27...valve, 28...valve spring.

Claims (1)

[Claims] 1. A cylindrical collection frame provided on the frame and having a collection port, a collection cylinder provided on the outer periphery of the collection frame, and a push spring inserted between one end of the collection cylinder and one end of the collection frame. a thread presser provided at one end of the collection tube; a longitudinal valve provided through the thread presser and the press spring; and a string attached to connect the thread presser and the frame. a filament provided on the frame and joined to the string; and an outer cylinder provided on the outer periphery of the collection frame, and when the string is cut by heating the filament, the compression spring A medical capsule characterized in that the collection tube slides to collect body fluid from the collection port, and the valve abuts against the outer tube to close the collection port. valve structure.