CN112153995A

CN112153995A - Gas trap member for chemical solution injection device and chemical solution injection device including the same

Info

Publication number: CN112153995A
Application number: CN201980033750.XA
Authority: CN
Inventors: 金镕玄
Original assignee: E-Wha Meditech Inc
Current assignee: E-Wha Meditech Inc
Priority date: 2018-05-24
Filing date: 2019-05-02
Publication date: 2020-12-29
Anticipated expiration: 2039-05-02
Also published as: WO2019225876A1; TW202003058A; CN112153995B; KR102018909B1

Abstract

According to an embodiment of the present invention, there is provided a gas trap member for use in a chemical solution injector which includes a gas generation space therein and injects a chemical solution by gas pressure generated in the gas generation space. According to an embodiment of the present invention, there is provided a gas trap member including: a first film made of a material through which a gas generated in the gas generation space can pass and through which a liquid material for generating the gas cannot pass; a second membrane joined to the first membrane to form a sealed gas trapping space and made of a material through which a gas generated in the gas generation space and a liquid material for generating the gas cannot pass; and a gas collection pipe which communicates the gas collection space with the outside of the gas generation space and guides the gas collected in the gas collection space to the outside of the gas generation space.

Description

Gas trap member for chemical solution injection device and chemical solution injection device including the same

Technical Field

The present invention relates to a novel gas trap member used in a gas-generating chemical solution injector that injects a chemical solution by gas pressure.

More specifically, the present invention relates to a technology that can minimize the problem that the gas trap member is immersed in a liquid material for gas generation in the gas generation space in a gas generation chemical solution injection device, and can stably and efficiently trap and supply the gas generated in the gas generation space to the gas supply space.

The present invention also relates to a chemical solution injector including the gas trap member described above.

Background

When a drug solution of a specific injection pharmaceutical such as an anticancer agent, an analgesic agent, or an antibiotic is administered to a patient or the like, it is necessary to continuously administer the drug solution in a constant amount for a considerable period of time depending on the state of the patient. If a particular injection of a pharmaceutical is not administered continuously and constantly in the amount required by the patient, the patient may be shocked and an accident may occur. In consideration of such a problem, a mechanical device for injecting a constant amount of liquid medicine into a patient per unit time is designed and used.

However, this conventional mechanical device slowly pushes a plunger of a syringe (syring) by a driving force of a motor, and thus requires an additional device such as a motor, thereby causing the device to be large-sized and unsuitable for a patient to carry.

In view of such problems, a medical fluid injection device that can be carried by a patient is disclosed in Korean patent laid-open publication No. 10-0262930. This conventional portable medical fluid injection device has a structure in which a resilient bag (referred to as a balloon or a gas bag) made of a rubber material is provided in a chamber. An inlet and an outlet are formed in the elastic balloon. When the injection port is filled with the drug solution, the bag expands. And is configured to allow the liquid chemical to flow out slowly through a discharge port in which a long tube is assembled. The medical solution is discharged in a small amount and injected into the vein of the patient.

However, in the chemical solution injector including such an elastic balloon, there is a possibility that a defective product such as uneven thickness or fine holes may be generated when the elastic balloon is manufactured. This weakness can cause variations in the elasticity, making the bag less elastic than desired. Thus, it is difficult to maintain the injection amount per unit time. Further, the elasticity of the elastic balloon may change depending on the amount of the remaining medical fluid, and thus an external force (elastic restoring force) that affects the flow of the medical fluid may be different between the initial stage and the final stage of the injection.

In addition, the physical force for pushing the drug solution is weak in the drug solution injection device including the elastic balloon. On the other hand, a chemical solution injector equipped with an elastic balloon having a low chemical solution injection pressure is extremely sensitive to the external environment such as the temperature and the like of the apparatus, and thus the flow rate of the chemical solution injected into the patient is extremely changed. In particular, when the flow rate of the drug solution to be injected into the patient is large, if the drug solution injection pressure is low, the drug solution may not be constantly pushed out. For this reason, the chemical solution injection device needs to increase the chemical solution injection pressure. In addition, if the flow rate is to be changed at any time during the injection of the drug solution into the patient, a higher pressure is required.

In order to overcome such a problem, a gas generating type chemical liquid injection device disclosed in korean patent laid-open publication No. 10-0507593 is known. In this device, the injection piston in the cylinder is stably and slowly moved forward by the generated high gas pressure, and the liquid medicine filled in the liquid medicine storage space in the cylinder is stably and continuously injected into the patient at a constant flow rate by this forward movement of the injection piston.

In such a gas generating chemical solution injector, a liquid material such as citric acid and a solid material such as sodium hydrogen carbonate are reacted to generate a gas (carbon dioxide), and the piston is advanced by the pressure of the generated gas to inject the chemical solution.

In the conventional gas generating chemical solution injector disclosed in korean laid-open patent publication No. 10-0507593, a gas trap member including a membrane filter having gas permeability and liquid impermeability is provided to trap only gas and supply the gas to a gas supply space behind an injection piston. Such a gas trap member may be soaked in a liquid substance for generating gas in the gas generating space before and/or during use.

However, even if the gas trap member is made of a material having gas permeability and liquid impermeability, if the gas trap member is immersed in a liquid material such as citric acid for a long time, the gas cannot pass through the gas trap member smoothly. That is, if the gas trap member is immersed in a liquid material, the space through which the gas passes is eliminated, and the gas trap is not performed smoothly. If the gas generated in the gas generation space is not smoothly trapped by the gas trapping member, the gas supply to the gas supply space is not smoothly performed, and the gas pressure behind the pressing piston becomes weak or the pressing piston cannot be pressed at a constant pressure.

That is, even though the conventional gas generating chemical solution injector described above is an excellent technique, it is still required to be improved as well as other excellent techniques. For example, in a gas generation chemical solution injection device, a new technique is required which can minimize the problem caused by the gas trapping member being immersed in a liquid material for gas generation in the gas generation space and stably and efficiently trap and supply the gas generated in the gas generation space to the gas supply space.

Accordingly, the present invention relates to a technique for stably and efficiently collecting and supplying gas generated in a gas generation space to a gas supply space while minimizing problems caused by the gas collection member being immersed in a liquid material for generating gas by attaching the gas collection member only to the periphery of a main body forming the gas generation space without contacting the bottom of the gas generation space.

On the other hand, it should be understood that the matters described as background art are only for increasing the understanding of the background of the present invention, and the cited matters are not admitted to be "prior art" to the present invention.

Disclosure of Invention

The present invention has been made to solve the above-mentioned problems occurring in the prior art and to provide various additional advantages. The present invention aims to provide a novel gas trap member used in a gas-generating chemical solution injection device that injects a chemical solution by gas pressure.

Specifically, an object of the present invention is to provide a gas generating chemical solution injector that minimizes the problem caused by the gas trap member being immersed in a liquid material for generating gas in a gas generating space and that stably and efficiently traps and supplies gas generated in the gas generating space to a gas supply space.

Another object of the present invention is to provide a chemical solution injector including the gas trap member as described above.

However, the subject matter of the present invention described above is illustrative, and the scope of the present invention is not limited thereto. Other objects and advantages of the present invention will become more apparent from the following detailed description of the invention, the appended claims and the accompanying drawings.

The above object is achieved by the gas trap member according to the present invention.

According to an embodiment of the present invention, there is provided a gas trap member for use in a chemical solution injector which includes a gas generation space therein and injects a chemical solution by gas pressure generated in the gas generation space.

According to an embodiment of the present invention, there is provided a gas trap member including:

a first film made of a material through which a gas generated in the gas generation space can pass and through which a liquid material for generating the gas cannot pass;

a second membrane joined to the first membrane to form a sealed gas trapping space and made of a material through which a gas generated in the gas generation space and a liquid material for generating the gas cannot pass; and

and a gas collection pipe which communicates the gas collection space with the outside of the gas generation space (gas supply space) and guides the gas collected in the gas collection space to the outside of the gas generation space (gas supply space).

In the gas trap member according to one specific example of the present invention, the first film and the second film may be formed in a rectangular shape, the first film may be disposed so as to surround the gas generation space, and the second film may be attached around an inner wall of a cylinder-shaped main body portion forming the gas generation space.

In the gas trap member according to one specific example of the present invention, the gas trap tube may be located at an end of the first membrane and the second membrane. The gas collecting space has a flow width that decreases in the direction toward the gas collecting pipe in order to smoothly guide the gas collected inside to the gas collecting pipe. That is, the length between the joining portions where the first membrane and the second membrane are joined is narrowed on the gas trap pipe side.

In the gas trap member according to an embodiment of the present invention, the gas trap member may be assembled by being inserted into the gas generation space in a complete ring shape or in a ring shape in which a part of the gas trap member is opened. In this case, the first film is located inside the gas generation space, and the second film is located outside the gas generation space, that is, on the inner wall side of the main body.

In this way, the first film made of the gas permeable-liquid impermeable material is in contact with the gas generation space, and the second film made of the gas impermeable-liquid impermeable material is attached around the inner wall of the main body, whereby the gas generated in the gas generation space can be trapped more effectively. In addition, the gas trap member according to an embodiment of the present invention is annularly inserted into the gas generation space and assembled, so that a portion soaked in a liquid material for generating gas can be minimized, and gas can be stably and efficiently trapped.

Further, the present invention provides a chemical solution injector including the gas trap member as described above.

With the above-described configuration, the present invention can minimize the problem caused by the gas trapping member being immersed in the liquid material for gas generation in the gas generation space, and can stably and efficiently trap and supply the gas generated in the gas generation space to the gas supply space in the gas generation-type chemical solution injection device.

On the other hand, the scope of the present invention is not limited by the effects described above.

Drawings

Fig. 1 is a perspective view schematically showing a chemical solution injector according to a specific example of the present invention.

Fig. 2 is a perspective view of a chemical solution injector according to a specific example of the present invention, seen from another direction.

Fig. 3 is an exploded perspective view schematically showing a part of a gas trap member and a chemical solution injector according to a specific example of the present invention.

Fig. 4 is a diagram showing a gas trap member according to a specific example of the present invention in an expanded state.

Fig. 5 is a sectional view showing a main part of the chemical solution injector according to one specific example of the present invention, the main part being cut in the longitudinal direction.

Fig. 6 is a partially enlarged sectional view of fig. 5.

Fig. 7 is a perspective view showing a shape (ring shape) of the gas trap member according to one specific example of the present invention when inserted into the gas generation space of the chemical solution injector.

Detailed Description

Preferred specific examples of the present invention will be described below with reference to the accompanying drawings. The following specific examples of the present invention are merely intended to embody the present invention and are not intended to limit or restrict the scope of the present invention. It is to be understood that all matters hithertofore set forth herein which are apparent to those of ordinary skill in the art to which the invention pertains are deemed to lie within the scope and spirit of the invention. The references cited herein are incorporated by reference.

Throughout the specification, when a part is referred to as "including" a certain component, unless specifically stated to the contrary, it means that the part may further include other components, and does not exclude other components.

Fig. 1 is a perspective view schematically showing a chemical solution injector 1000 according to a specific example of the present invention, and fig. 2 is a perspective view of the chemical solution injector 1000 according to a specific example of the present invention as viewed from another direction. Fig. 3 is an exploded perspective view showing a part of the gas trap member 200 and the chemical solution injector 1000 according to a specific example of the present invention.

The chemical solution injector 1000 according to one specific example of the present invention includes, as main components, a substantially cylindrical cylinder 110, an injection piston 140, and a gas generating unit 130.

As shown in fig. 1, a chemical liquid flow pipe 150 through which a chemical liquid flows in and out is connected to one end of a substantially cylindrical cylinder 110, and a gas generating portion 130 is connected to the other end.

The injection piston 140 is movable in an airtight manner inside the cylinder 110, and divides the internal space of the cylinder 110 into a chemical liquid storage space 114 and a gas supply space 116, wherein the chemical liquid storage space 114 is filled with a chemical liquid flowing therein through the chemical liquid flow tube 150, and the gas supply space 116 is supplied with a gas generated in the gas generation part 130. The distal end of the chemical flow tube 150 may be provided with a distal end cap (not shown), and an injection needle, a catheter (not shown), or the like may be connected to the distal end cap.

As shown in fig. 1 and 2, at least one groove is formed around the main body of the injection piston 140, and the

seal rings

144a and 144b are sandwiched and coupled in the groove. The injection piston 140 can move in an airtight manner inside the cylinder 110 by

such seal rings

144a, 144 b.

As shown in fig. 1 to 3, the gas generating unit 130 is substantially composed of a main body 131 and a cap 132. The substantially cylindrical body 131 forms a gas generation space 139 therein (see fig. 5).

Referring to fig. 3 and 5, the gas generating portion 130 contains a liquid material L and a solid material 134. The liquid substance L is contained in the body 131, and the solid substance 134 is contained in the cap 132. The solid substance 134 is separated from the liquid substance L by the partition 133 and is accommodated in the cap 132. The structure and shape of the partition 133 are not limited to those shown in fig. 3, and any structure may be employed as long as it separates the liquid substance L from the solid substance 134 and the solid substance 134 is detached from the cap 132 and falls onto the liquid substance L when an external force is applied to the cap 132. The solid substance 134 may be configured as a mass containing sodium bicarbonate as a main component, for example, and the liquid substance L may be an acidic liquid substance such as citric acid that generates carbon dioxide when reacting with the solid substance 134.

The main body 131 includes a liquid material inlet 160 into which a liquid material L such as citric acid can be injected. The liquid material injection port 160 is formed in a substantially cylindrical shape having a hollow portion therein, and extends from the main body 131 toward the gas supply space 116 (see fig. 1 to 3). The liquid material injection port 160 is connected to the gas generation space 139. After the liquid material L is injected into the gas generation space 139 through the liquid material injection port 160, the operator seals the liquid material injection port 160 with a plug or the like.

When an external force is applied to the cap 132 to separate the partition 133 and the solid substance 134 falls into the gas generation space 139 in the body 131, the solid substance L reacts with the liquid substance L to generate gas, that is, carbon dioxide.

The generated gas is trapped by the gas trapping member 200 in the body 131 and discharged to the gas supply space 116 of the cylinder 110, thereby pressing the rear of the injection piston 140.

A pressure regulating valve 138 (see fig. 1 and 2) for preventing the pressure of the gas from exceeding a predetermined pressure or more may be provided on the projection 137 protruding from the body 131 of the gas generating unit 130. In order to prevent the medical fluid from being injected into the patient faster than a predetermined flow rate, the pressure regulating valve 138 connects the gas supply space 116 to the outside (for example, the atmosphere) and allows the gas in the gas supply space 116 to flow out to the outside when the pressure in the gas supply space 116 is higher than a predetermined pressure. As a result, the pressure of the gas supply space 116 is kept constant.

The switching member 136 is provided between the gas supply space 116 and the gas generation space 139, and connects the atmosphere to the gas supply space 116 when the chemical liquid is filled, and connects the gas supply space 116 to the gas generation space 139 when the chemical liquid is injected. The switching member 136 is provided between the atmosphere, the gas supply space 116, and the gas generation space 139. Here, "connected" means that two or more spaces are connected to allow a gas (air or carbon dioxide) to flow. Here, "atmosphere" refers to the outside of the chemical solution injector 1000, and is in an atmospheric pressure state. The atmosphere is not limited to this, and may be a place or a device that maintains the atmospheric pressure or a pressure similar to the atmospheric pressure, or maintains a pressure lower than the pressure of the chemical solution storage space 114 when the chemical solution is injected.

Referring to fig. 5, the switching member 136 includes a switching cylinder 310, a switching piston 320, and a switching elastic member 330.

The switching cylinder 310 is connected to the atmosphere, the gas supply space 116, and the gas generation space 139. The switching cylinder 310 may be a cylindrical cylinder extending in one direction. The switching cylinder 310 may extend in a radial direction of the cylinder 110. Of course, the shape and/or the extending direction of the switching cylinder are not limited thereto.

The switching cylinder 310 includes: a first hole 311 connecting the atmosphere and the inside of the switching cylinder 310; a second hole 312 connecting the gas generation space 139 and the interior of the switching cylinder 310; and a third hole 313 connecting the gas supply space 116 and the inside of the switching cylinder 310. The first hole 311, the second hole 312, and the third hole 313 perform a function of a flow path through which the gas flows. The third hole 313 is located between the first hole 311 and the second hole 312. The third hole 313 may be formed at a position closer to the first hole 311 than the second hole 312 with respect to the vertical direction (longitudinal direction of the cylinder).

For example, as shown in fig. 5, a second hole 312 and a third hole 313 are formed at a sidewall of the switching cylinder 310. Also, as shown in fig. 5, the first hole 311 may be formed at any one end of the switching cylinder 310. The third hole 313 is located between the second hole 312 and the first hole 311. Further, the distance from the first hole 311 to the third hole 313 is shorter than the distance from the first hole 311 to the second hole 312 with respect to the vertical direction (longitudinal direction of the cylinder). The other end of the switching cylinder 310 may be blocked. Alternatively, the switching cylinder 310 may further include a fourth hole 314. The fourth hole 314 is formed at the opposite side of the first hole 311, that is, the other end of the switching cylinder 310. The fourth aperture 314 is blocked by the plug 340.

The switching cylinder 310 as described above may be integrally formed with the body portion 131 of the gas generating part 130. Alternatively, the switching cylinder 310 may be separately configured and coupled to the main body 131 of the gas generating unit 130. Hereinafter, for the sake of omitting the description, only the case where the switching cylinder 310 is formed integrally with the body portion 131 will be described, but the present invention is not limited thereto.

The main body 131 of the gas generating unit 130 has a partition wall formed therein, and the outer wall thereof has a substantially cylindrical shape. The first hole 311, the second hole 312, the third hole 313, and the fourth hole 314 are formed in an inner partition wall or an outer wall of the body portion 131. The main body 131 of the gas generating unit 130 may include an external air inlet and outlet 135 coupled to the switching cylinder 310. The outside air inlet and outlet 135 is formed on a side surface of the main body 131 of the gas generating unit 130, and is connected to the first hole 311 of the switching cylinder 310.

The external air inlet/outlet 135 may be provided with a gas-permeable/liquid-impermeable hydrophobic filter (not shown). Such a hydrophobic filter allows external air to flow into the device through the external air inlet/outlet 135, but prevents water, chemical solution, liquid contaminants, and the like from flowing into the device from the outside.

The main body 131 and the switching member 136 are explained in detail above. Hereinafter, the gas trap member 200 that traps and transfers the gas generated in the gas generation space 139 to the gas supply space 116 will be described in detail.

The gas trap member 200 does not pass the liquid material L, and traps and transfers the gas generated in the gas generation space 139 to the second hole 312. The gas trap member 200 is made of a material having gas permeability and liquid impermeability.

Referring to fig. 3, 4, and 7, the gas trapping element 200 includes a first membrane 210, a second membrane 220, and a gas trapping pipe 240. The first membrane 210 is made of a material through which the gas generated in the gas generation space 139 can pass and through which the liquid material L for generating the gas cannot pass, and may be made of, for example, a filter having gas permeability and liquid impermeability.

The second membrane 220 may be joined with the first membrane 210 to form a closed gas trapping space 250. The second film 220 is made of a material that does not allow the gas generated in the gas generation space 139 and the liquid material L for generating the gas to pass therethrough, and may be made of, for example, pvc (polyvinyl chloride) material that does not allow the gas and the liquid to pass therethrough. The material of the second film 220 is not limited to this, and it is needless to say that the second film may be formed of various gas and liquid impermeable materials.

As shown in fig. 4, the first film 210 and the second film 220 are formed in a substantially rectangular shape (rectangular shape), and have a height (Z direction) substantially equal to or slightly lower than the internal height of the main body 131, and a width (X direction) corresponding to the circumferential length of the inner wall of the main body 131. That is, the first film 210 and the second film 220 may surround the gas generation space 139 when inserted into the body 131.

In addition, the second membrane 220 may be joined with the first membrane 210 to form a gas trapping space 250. The gas trapping space 250 is a relatively narrow space between the first film 210 and the second film 220 before trapping the gas, but is formed as shown in fig. 5 when the gas is trapped.

The second film 220 may be directly bonded to the first film 210 or indirectly bonded through a medium. For example, the first film 210 and the second film 220 may be joined to each other at edge positions to form the joint 230. In order to secure the gas trapping space 250 to the maximum extent, the joining may be performed by applying ultrasonic vibration along the edge positions of the first and

second membranes

210 and 220. Of course, the method of application is not limited to this.

As shown in fig. 4, the first film 210 and the second film 220 are formed in a substantially rectangular shape (rectangular shape), and a gas trapping space 250 is formed inside by joining edge positions. On the other hand, a nonwoven fabric or the like may be provided between the first film 210 and the second film 220 or in the gas trapping space 250, thereby achieving more effective gas trapping.

To discharge the gas trapped in gas trapping space 250, gas trapping assembly 200 includes a gas trapping pipe 240 coupled to gas trapping space 250. The gas collection pipe 240 is configured in a substantially thin pipe form, communicating the gas collection space 250 with the gas supply space 116. The gas collection pipe 240 is located between the first membrane 210 and the second membrane 220, and is adhered to the first membrane 210 and the second membrane 220 in a close contact manner. That is, gas does not leak between the gas trap pipe 240 and the first membrane 210 and/or between the gas trap pipe 240 and the second membrane 220.

The gas collection header 240 may be located at the end of the first membrane 210 and the second membrane 220. For example, the gas trapping space 250 has a flow width (Z direction) that becomes narrower toward the gas trapping pipe 240 in order to smoothly guide the gas inside to the gas trapping pipe 240. That is, the distance between the upper and lower joints 230 of the first and

second membranes

210 and 220 becomes narrower toward the gas collection pipe 240. The gas flow width or the length between the upper and lower joints 230 may be reduced so as to sharply form a step difference, or may be gradually reduced (see fig. 3, 4, and 7).

The gas trapping member 200 may be inserted in a complete ring shape or a ring shape in which a part thereof is opened when inserted into the body 131 (see fig. 3 and 7). In addition, the gas trap member 200 can maintain a ring shape before insertion. At this time, the first film 210 is located at the inner side, and the second film 220 is located at the outer side. Therefore, the first film 210 made of a gas-permeable/liquid-impermeable material is in contact with the gas generation space 139, and the gas collection member 200 can collect the gas more effectively (see fig. 5).

The position of the gas trap member 200 will be described in more detail with reference to fig. 5. The gas trap member 200 is located inside the body 131 in a ring shape and attached around the inner wall of the body 131 in a ring shape. The gas trapping part 200 is configured to surround the gas generation space 139 so that the gas generation space 139 can be secured to the maximum extent.

At this time, the gas trap member 200 is not disposed on the bottom surface of the body 131 adjacent to the gas supply space 116. The conventional gas trap member is configured in a bowl (bowl) shape surrounding not only the inner wall of the body 131 but also the bottom surface of the body 131 adjacent to the gas supply space 116. Therefore, the conventional gas trap member is exposed to and in contact with the liquid material L in a state where the liquid material L is contained in the main body portion. The conventional gas trap member is made of a gas-permeable and liquid-impermeable material, and is repeatedly exposed to and contacted with the liquid material L, thereby causing a problem of being immersed in the liquid material L. When the gas trap member is immersed in the liquid material L, the gas becomes a state in which the gas is difficult to permeate, and it is difficult to smoothly perform gas trapping.

On the other hand, the gas trap member 200 according to one specific example of the present invention is assembled by being inserted into the body 131 in a ring shape, not in a bowl shape, so that the portion immersed in the liquid material L can be minimized, and the gas can be stably and efficiently trapped.

On the other hand, the gas trap member 200 is connected to the second holes 312 as shown in fig. 5 and 6 in order to transfer the gas to the gas supply space 116. Since the gas collection pipe 240 is inserted into the second hole 312 in a close contact manner, leakage of the collected gas can be prevented.

The trapping and movement of the gas will be described with reference to fig. 5 to 7. Referring to fig. 7, the gas generated in the gas generation space 139 moves to the gas trapping space 250 through the first membrane 210 located at the inner side. At this time, the liquid material L does not flow into the gas trapping space 250 due to the first film 210. As the gas continuously flows into and diffuses into the gas trapping space 250, the internal pressure of the gas trapping space 250 rises. Thus, the gas within the gas trapping space 250 will move to the gas trapping tube 240.

As shown in fig. 5, the gas trapped as described above moves from the gas trapping space 250 to the second holes 312 through the gas trapping header 240. The gas moved to the second hole 312 flows into the interior of the switching cylinder 310. The gas flowing into the switching cylinder 310 increases the internal pressure of the switching cylinder 310 to move the switching piston 320 in the-X direction. Due to this operation, the second hole 312 and the third hole 313 originally blocked by the switching piston 320 are coupled (see fig. 6).

The gas flowing into the switching cylinder 310 moves to the gas supply space 116 through the third hole 313, and the internal pressure of the gas supply space 116 is increased. The piston 140 moves forward with the increase in the internal pressure of the gas supply space 116, and pushes the chemical liquid in the chemical liquid storage space 114 to inject the chemical liquid.

As described above, the gas trap member and the chemical solution injector including the same according to the specific example of the present invention can minimize the problem of the gas trap member being immersed in the liquid material, and can stably and efficiently trap and supply the gas into the gas supply space, thereby achieving smooth chemical solution injection.

The present invention has been described above with reference to the specific examples, but the present invention is not limited thereto. Those skilled in the art can make modifications and alterations without departing from the spirit and scope of the present invention, and it is understood that such modifications and alterations also belong to the present invention.

Claims

1. A gas trap member used in a chemical liquid injection device which includes a gas generation space inside and injects a chemical liquid by gas pressure generated in the gas generation space,

wherein the content of the first and second substances,

the gas trapping member includes:

a gas collection pipe that communicates the gas collection space with the outside of the gas generation space and guides the gas collected in the gas collection space to the outside of the gas generation space.

2. The gas trapping component of claim 1, wherein,

the first film and the second film are formed in a rectangular shape, the first film is disposed so as to surround the gas generation space, and the second film is attached around an inner wall of a cylinder-shaped main body portion forming the gas generation space.

3. The gas trapping component of claim 2, wherein,

the gas trap member is assembled by being inserted into the gas generation space in a complete ring shape or a partially opened ring shape.

4. The gas-trapping member according to any one of claims 1 to 3, wherein,

the gas collection pipe is connected to the gas collection space at the end portions of the first membrane and the second membrane, and the gas collection pipe has a gas flow width that decreases in the direction toward the gas collection pipe.

5. A liquid medicine injection device, wherein,

the chemical solution injection device includes the gas trap member according to any one of claims 1 to 3.