CN1206962C - Inhalation miniature sampling apparatus - Google Patents

Abstract

The present invention relates to a suction type miniature sampling device which relates to a pill type sampling device capable of swallowing. The present invention is used for collecting liquid in a digestive tract of an animal or a human body. The device comprises an outer shell, holes at the end parts of the outer shell, a control mechanism, a power mechanism, a movable mechanism and a sharp object, wherein the outer shell forms an enclosed hollow cavity after being connected in a sealing mode; the holes are respectively communicated with the hollow cavity; the sharp objects are fixed on the movable mechanism opposite to the through holes at the end parts of the outer shell. Before the movable mechanism moves, the movable mechanism is fixedly connected with the control mechanism; an air bag is arranged in the hollow cavity of the outer shell, and the air inlet end of the air bag has an opening hole which is communicated with the air bag and extends out of the air bag; the inner part of the hole has a sealing plug; after the control mechanism is arranged in the air bag, the air bag forms a transition fit with the inner wall of the outer shell; the power mechanism and the movable mechanism are arranged in the hole of the control mechanism; the through holes on the control mechanism are communicated with the air bag on both sides of the control mechanism, and the through hole on the sampling end of the outer shell is provided with an opening mechanism or a sealing mechanism. The suction type miniature sampling device has the advantages of high reliability for sampling, low energy consumption and simple structure.

Description

Suction Micro Sampling Device

Technical field:

The invention relates to a swallowable sampling device, in particular to a pill type swallowable sampling device for collecting liquid in the digestive tract of animals or human bodies.

Background technique:

U.S. Patent No. 5,395,366 discloses a pill type sampling device, which includes a sampling chamber for storing sampling liquid, a piston for generating a partial vacuum, a spring for driving the piston, and a control for controlling the movement of the piston. Mechanism, the device is used to collect fluid in the digestive tract of animals. The device uses the energy of the compressed spring to drive the piston, and the piston moves from one end of the sampling chamber with a one-way valve to the other end, and the partial vacuum generated during the movement sucks the liquid outside the device into the sampling chamber. There are following deficiencies in this device. First of all, the biggest disadvantage of the device is its complex structure. Since the device uses the movement of the piston to generate a partial vacuum for sampling, the piston must exhaust gas when it moves to one end, so a vent hole is specially designed in the device, and the vent hole is blocked with a detachable plug , When sampling, the piston uses air pressure to squeeze out the plug. If the plug cannot be disengaged during the operation, sampling cannot be performed, and the reliability is reduced. In addition, the thrust of the spring is used to make the piston move. In order to overcome the friction force and air discharge, etc., it needs a large power to drive, and the drive mechanism with large control energy needs to consume more energy to control. The control mechanism of the device needs Larger current is used to control, while increasing energy, it also increases the volume of the control mechanism.

Invention content:

The purpose of the present invention is to overcome the deficiencies of the prior art and provide a suction micro-sampling device with high sampling reliability, low energy consumption and simple structure.

The technical scheme of the present invention is that the device includes a casing, a control mechanism, a power mechanism and a movable mechanism; hole, the movable mechanism is opposite to the hole connecting the shell cavity, the sharp object is fixed on the movable mechanism, and the other end of the shell, namely the sampling end, has a sampling through hole; before the movable mechanism moves, the movable mechanism and the control mechanism are fixed Connection; an airbag is installed in the cavity of the shell, and there is an opening hole connected with the airbag and extending out of the airbag at the air intake end of the airbag. There is a sealing plug in the opening hole. After the control mechanism is installed in the airbag, it is transitionally matched with the inner wall of the shell. A power mechanism and a movable mechanism are installed in the hole of the control mechanism, and a through hole is provided on the control mechanism to communicate with the airbags on both sides of the control mechanism, and a mechanism for opening or sealing the sampling through hole is provided at the sampling end of the shell.

The working process of the present invention is as follows: after the air bag is fully inflated, the device is swallowed into the digestive tract, and the control mechanism breaks the fixed connection between the movable mechanism and the control mechanism after receiving the control signal to start sampling, and the power mechanism drives The movable mechanism moves, and the sharp object fixed on the movable mechanism punctures the airbag, the air in the airbag is quickly discharged from the through hole at the exhaust end, the airbag shrinks rapidly, and the rapid shrinkage of the airbag at one end of the sampling chamber generates a partial vacuum, which is located at Liquid outside the device is drawn into the sampling chamber.

Compared with the prior art, the present invention has the following technical effects:

1. High sampling reliability. Because the airbag discharges gas from the punctured part, the gas is directly discharged from the through hole, so there is no problem that the vent hole cannot be opened, and the reliability is improved.

2. Low energy consumption. The power needed to puncture the airbag is far less than the power needed to drive the piston, and the energy required by the corresponding control mechanism is also correspondingly reduced.

3. Simple structure. Since the contraction of the airbag is used to replace the movement of the piston, the complicated design of the piston mechanism can be avoided, and components such as springs, pistons, and sealing rings are omitted, making the structure simpler.

Description of drawings

Fig. 1 is a structural diagram of the present invention;

Fig. 2 is the structural diagram in sampling process of the present invention;

Fig. 3 is the structural diagram after sampling of the present invention is completed;

In Figures 1 to 3:

1-shell, 2-airbag, 3-control mechanism, 4-sealing plug, 5-exhaust through hole, 6-sampling chamber

7-spring, 8-fusible wire, 9-heating resistor, 10-round through hole, 11-flexible connecting wire

12-sealing cover, 13-support spring, 14-sampling through hole, 15-sharp object, 16-exhaust chamber, 17-movable mechanism

Detailed ways

The shell of the utility model is formed by two sections of sealed connection, and the control mechanism includes a heating resistor [9], a power supply and a remote control mechanism, wherein the power supply can be a button battery or an external wireless power transmission, and the remote control mechanism can use a remote control switch or an external For the method of direct triggering of the wirelessly transmitted current, please refer to the US patent US 2002055734 for the specific method of in vitro wireless power transmission.

Spring [7] and movable mechanism [17] are housed in the hole of control mechanism [3]. Before movable mechanism [17] moves, movable mechanism [17] and control mechanism [3] pass fusible link [8 ] is fixedly connected to the heating resistor [9]. In the control mechanism [3] of piston type, be provided with circular through hole [10] in addition, and circular through hole [10] is communicated with the air bag on both sides of control mechanism [3]. After the control mechanism [3] is installed in the airbag [2], it transitionally cooperates with the inner wall of the shell [1] to isolate the closed cavity formed by the inner wall of the shell [1] into two small chambers, one end is a sampling chamber [6], The other end is an exhaust chamber [16].

At the inlet end of the airbag, there is a circular opening that communicates with the airbag and extends out of the airbag. There is a sealing plug [4] in the opening, and the circular opening of the airbag [2] is connected with the sealing plug [4] located therein. Sealed by wire wrap or other means. The airbag [2] is made of soft and high-elastic material. During assembly, gas can be injected into the airbag [2] from the sealing plug [4] through a syringe. After the gas is injected, the airbag is in an elastic expansion state and is located in the sampling chamber [ The air bag [2] at the end of 6] is fully inflated until the whole sampling chamber [6] is filled and the sampling through hole [14] is blocked.

The mechanism for opening or sealing the sampling through hole of the sampling end of the shell includes a sealing cover [12] and a supporting spring [13]. One end of the supporting spring [13] is fixedly connected with the sealing cover, and the other end is located in the through hole of the sampling end, and the sealing Cover [12] is fixedly connected with air bag by flexible connection line [11].

The mechanism for opening or closing the sampling hole at the sampling end of the casing includes a spring, a sealing plug that is fixedly connected with the spring and is matched with the through hole of the sampling end, and the sealing plug that is matched with the through hole of the sampling end is fixedly connected with the air bag through a flexible connection line .

When no external force is applied, the supporting spring [13] supports the sealing cover [12] or the sealing plug so that the sampling through hole [14] is in an open state. When the air bag [2] is punctured, the flexible connecting line [11 ] is tensioned under the contraction force of the airbag [2], and the sealing cover or sealing plug seals the sampling through hole [14].

Claims (3)

1. An inhalation micro-sampling device, including a casing, a control mechanism, a power mechanism and a movable mechanism; the casing is composed of a sampling end casing and an exhaust end casing sealed and connected, and the exhaust end of the casing has a cavity with the casing Connected hole, the movable mechanism is opposite to the hole connected to the housing cavity, the sharp object is fixed on the movable mechanism, and the other end of the casing, namely the sampling end, has a sampling through hole; before the movable mechanism moves, the movable mechanism and the control The mechanism is fixedly connected; it is characterized in that an air bag is installed in the cavity of the shell, and an opening hole that communicates with the air bag and extends out of the air bag is provided at the inlet end of the air bag. There is a sealing plug in the opening hole. The inner wall of the casing is transitionally fitted, and the hole of the control mechanism is equipped with a power mechanism and a movable mechanism. There is also a through hole on the control mechanism to communicate with the airbags on both sides of the control mechanism. There is a sampling hole at the sampling end of the casing to open or seal it. organization. 2. The inhalation-type micro-sampling device according to claim 1, characterized in that the mechanism for opening or sealing the sampling through-hole at the sampling end of the casing includes a spring, a sealing plug that is fixedly connected with the spring and cooperates with the through-hole of the sampling end. The sealing plug matched with the through hole of the sampling end is fixedly connected with the air bag through a flexible connecting line. 3. The inhalation micro-sampling device according to claim 1, characterized in that the mechanism for opening or sealing the sampling through hole at the sampling end of the housing includes a sealing cover and a supporting spring, and the sealing cover is fixedly connected to the air bag through a flexible connecting line , one end of the supporting spring is fixedly connected with the sealing cover, and the other end is located in the through hole of the sampling end.

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