CN222398364U - Airtight applicator - Google Patents

Abstract

The present utility model discloses an airtight applicator that helps to prevent gas from directly entering the applicator and thereby affecting the medical device probe, and to reduce permeation of gas into the interior of the applicator through the applicator housing material, thus helping to increase the shelf life of the medical device. The airtight applicator is used for applying an implantable medical device to a human body and comprises a shell part, an exposed movable part and a detachable part, wherein the shell part is provided with an upper opening and a lower opening, the exposed movable part is arranged on the upper opening, the exposed movable part moves relatively to the shell part when the application operation is carried out, the detachable part is arranged on the lower opening in a detachable mode, the upper opening is sealed by an upper sealing structure between the shell part and the exposed movable part, and the lower opening is sealed by a lower sealing structure between the shell part and the detachable part.

Description

Airtight applicator

Technical Field

The utility model relates to the technical field of medical instruments, in particular to an airtight applicator.

Background

Body fluid testing is a common medical testing tool. Many medical devices for detecting body fluids require the use of an applicator for implantation into the skin, and the probe of the medical device is brought into contact with the body fluid for detection and transmission of signals. Such as those used in continuous blood glucose monitoring CGM (Continues Glucose Monitoring), in use, the test probe needs to be inserted subcutaneously by puncturing the skin with the aid of a guide needle, and then the guide needle is removed, leaving the probe portion subcutaneously for blood glucose testing. This implantation procedure requires the applicator of the medical device to assist.

All or part of the medical device is typically provided to the user together with the medical device mounted inside the applicator, i.e. held inside the applicator, prior to shipment. When the medical instrument is used by a user, the medical instrument is pushed to the skin of the user by pushing the applicator or triggering a triggering switch of the applicator, in the process, the guiding needle of the medical instrument pierces the skin and enters the skin with the probe, after the medical instrument is clung to the skin and the probe reaches the corresponding position, the applicator stops pushing forward and releases the medical instrument, and the inner structure of the applicator is removed from the skin with the guiding needle and is separated from the medical instrument, so that the implantation process is completed.

Fig. 1A is a schematic view of a structure of a medical device for body fluid detection in the prior art, and fig. 1B is a schematic view of an exploded state of the medical device shown in fig. 1A. As shown in fig. 1A and 1B, the medical device 2 is mainly composed of three parts, i.e., an integrated guide needle 21, a device body 22, and a probe 23. The integral introducer needle 21 is passed through the instrument body to encase the probe 23, and during implantation, is subcutaneously implanted with the probe 23, and the introducer needle 21 itself is withdrawn, leaving the probe 23 subcutaneously.

Fig. 2A to 2C are schematic views of the structure of an applicator of the prior art (wherein a sealing structure in an embodiment of the present utility model is also shown additionally). Generally, applicators typically have an internal stationary component that is connected to the internal moving component prior to actuation of the applicator, an internal moving component for moving the medical device from within the applicator to the skin, and a driver for providing a driving force for the movement of the internal moving component. For the needle withdrawing action, after the movable seat carries the medical instrument to the skin in the later stage of the implantation process, the elastic arm 150 (see fig. 9A) on the movable seat is not blocked by the inner shell retainer 130 (see fig. 8C), and is opened under the elastic force of the needle withdrawing spring, the needle withdrawing seat is separated upwards due to the force of the needle withdrawing spring and takes the guide needle away, and then the applicator can be removed, and the medical instrument is left on the skin. The above is the basic principle of operation of the applicators in the prior art.

While the existing applicators can circulate air to the medical devices during storage, for some probes, if the probes are contacted with the air for a long time, physical properties of substances on the probes for detection change to cause malfunction or failure, for example, oxygen or water vapor can gradually change enzymes or membranes on the probes, so that the detection effect is poor or vanishes. There is therefore a need for a new applicator.

Disclosure of utility model

In view of this, the present utility model proposes an airtight applicator that helps to prevent gas from directly entering the applicator and thereby affecting the medical device probe, and to reduce the permeation of gas into the interior of the applicator through the applicator housing material, thus helping to increase the shelf life of the medical device.

The utility model provides the following technical scheme:

An airtight applicator for applying an implantable medical device to a human body, the applicator comprising a housing member having an upper opening and a lower opening, an exposed movable member disposed in the upper opening, and a detachable member detachably disposed in the lower opening with respect to the housing member upon application operation, a seal for the upper opening being achieved by an upper seal structure between the housing member and the exposed movable member, and a seal for the lower opening being achieved by a lower seal structure between the housing member and the detachable member.

The upper sealing structure comprises an upper annular sealing groove and an upper sealing ring, the shell part is provided with a sealing side wall which surrounds an upper opening of the shell part, the outer peripheral surface or the inner peripheral surface of the exposed movable part is attached to the sealing side wall, the upper annular sealing groove is arranged on the sealing side wall or the outer peripheral surface or the inner peripheral surface of the exposed movable part, the upper sealing ring is arranged in the upper annular sealing groove, and the upper sealing ring is extruded when the upper sealing ring is attached to form a seal for the upper opening between the shell part and the exposed movable part.

Optionally, the exposed movable component is a key for triggering the application operation when being pressed by an external force.

The lower sealing structure comprises a lower annular sealing groove and a lower sealing ring, wherein the lower annular sealing groove is formed on one of the outer peripheral surface of the detachable part and the inner wall of the lower opening of the shell part, or the lower annular sealing groove is formed on the other of the inner peripheral surface of the detachable part or the outer wall of the lower opening of the shell part, the lower sealing ring is arranged in the lower annular sealing groove, and the lower sealing ring is extruded when the lower sealing ring is attached to form a seal for the lower opening between the shell part and the detachable part.

Optionally, a threaded connection is employed between the detachable component and the housing component.

Optionally, the detachable component is a bottom cover for covering the lower opening.

Optionally, the sections of the upper sealing ring and the lower sealing ring are round, and the material is ethylene propylene diene monomer rubber.

Optionally, the shell member, the exposed movable member, and the detachable member are plastic materials.

Optionally, the plastic is polypropylene.

Optionally, the housing member is a housing of the applicator.

The anti-disassembly label is arranged in the middle of the anti-disassembly label, when the shell and the bottom cover are subjected to opposite torques, the anti-disassembly label is torn at the weak part, so that the part originally stuck to the side surface of the shell is kept on the side surface of the shell, and the part originally stuck to the side surface of the bottom cover is kept on the side surface of the bottom cover.

Optionally, the medical device further comprises an internal fixed part, an internal moving part and a driver, wherein the internal fixed part is connected with the internal moving part before the trigger of the applicator, the internal moving part is used for moving the medical device from the interior of the applicator to the skin, and the driver is used for providing a driving force for moving the internal moving part.

Optionally, the built-in fixing component is an inner shell; the built-in moving part is a moving seat, the driver is a driving spring, the inner shell is provided with at least one cantilever with a buckling position and is used for hooking the moving seat by the buckling position before triggering the applicator, the moving seat is provided with at least two rotating arms and is used for clamping medical equipment, and the driving spring is positioned between the inner shell and the moving seat.

Optionally, a pressing surface is arranged on the key, the pressing surface is exposed out of the applicator, at least one triggering rib is arranged below the key, after the bottom cover is removed, the triggering rib descends to be capable of contacting with a cantilever of the inner shell when the pressing surface is pressed down by external force, the key continues to descend to apply force to force the cantilever to transversely open, and when the cantilever buckling position is not hooked on the moving seat any more, the moving seat is pushed by the driving spring to move downwards.

Optionally, the pressing surface is provided with a pressing mark for a user to identify a pressing position so as to provide the external force.

Optionally, at least one anti-touch rib is arranged on the bottom cover, a lower supporting arm is arranged below the triggering rib, an outer supporting rib is arranged on the periphery of the arm of the inner shell, the inner side of the anti-touch rib blocks the outer supporting rib when the bottom cover is connected with the outer shell, so that the cantilever of the inner shell is prevented from being opened, and the upper end of the anti-touch rib blocks the lower supporting arm, so that the triggering rib is prevented from triggering downwards.

Optionally, a gas absorbing member is disposed within the bottom cover.

According to the technical scheme, the periphery of the applicator consists of a shell part, an exposed movable part and an exposed detachable part, and movable sealing structures are arranged between the shell part and the exposed movable part and between the shell part and the exposed detachable part, so that the whole periphery is airtight. The outer shell part is an outer shell, the exposed movable part is a key, the exposed detachable part is a bottom cover, an upper sealing structure is arranged between the outer shell and the key, a lower sealing structure is arranged between the outer shell and the bottom cover, and the outer shell and the bottom cover form a peripheral integral seal together so as to prevent gas from directly entering the applicator to influence medical equipment. In addition, the utility model is provided with the false triggering prevention structure, so long as the bottom cover is not opened, the false triggering prevention structure can ensure that the applicator can not cause unnecessary triggering caused by vibration impact and false key touching.

Drawings

For purposes of illustration and not limitation, the utility model will now be described in accordance with its preferred embodiments, particularly with reference to the accompanying drawings, in which:

FIG. 1A is a schematic illustration of the structure of a medical device for body fluid detection of the prior art;

FIG. 1B is a schematic illustration of the medical device of FIG. 1A in an exploded state;

FIGS. 2A-2C are schematic illustrations of the structure of an applicator of the prior art;

FIG. 3A is a schematic view of the main structure of the applicator in an embodiment of the present utility model;

FIG. 3B is a schematic view of the main components of the applicator in an embodiment of the present utility model in an exploded state;

FIG. 4A is a schematic illustration of a first sealing mode of an embodiment of the present utility model;

FIGS. 4B and 4C are schematic views of an upper seal structure and a lower seal structure, respectively, of a first seal mode of an embodiment of the present utility model;

FIG. 5A is a schematic illustration of a second sealing mode of an embodiment of the present utility model;

FIGS. 5B and 5C are schematic views of an upper seal structure and a lower seal structure, respectively, of a second seal mode of an embodiment of the present utility model;

FIG. 6A is a schematic illustration of the external shape of an applicator in an embodiment of the present utility model;

FIG. 6B is a schematic view showing a state in which the outer case of the applicator is separated from the bottom cover in the embodiment of the present utility model

FIG. 7 is a schematic diagram of a key structure in an embodiment of the present utility model;

Fig. 8A to 8C are schematic views of an inner housing structure of an applicator in an embodiment of the present utility model;

Fig. 9A and 9B are schematic views of the structure of a motion seat of an applicator in an embodiment of the present utility model;

FIGS. 10A-10C are schematic illustrations of an applicator implantation process according to an embodiment of the present utility model;

fig. 11A to 11C are schematic views of a false triggering prevention structure of an applicator according to an embodiment of the present utility model.

1, An applicator; 10, label, 11, outer shell, 111, upper opening, 112, lower opening, 113, outer shell elastic side wall, 114, outer shell airtight side wall, 115, outer shell sealing side wall, 116, outer shell rubber ring groove, 12, button, 121, button pressing surface, 122, pressing mark, 123, trigger rib, 1231, trigger inclined surface, 124, button lower supporting arm, 125, button rubber ring groove, 126, button sealing side wall, 13, inner shell, 130, inner shell retainer ring, 131, inner shell cantilever, 1311, deformation inclined surface, 1312, inner shell cantilever snap-in position, 132, inner shell outer supporting rib, 14, withdrawing needle seat, 15, moving seat, 150, elastic arm, 151, moving seat hanging buckle surface, 152, moving seat rotating arm, 1521, rotating arm rotary hook, 16, bottom cover, 161, bottom cover anti-touch rib, 1611, bottom cover inner blocking surface, 1612, bottom cover upper blocking surface, 162, bottom cover elastic side wall, 163, bottom cover sealing side wall, 171, upper sealing ring, 172, lower sealing ring, 181, pushing spring, 182, withdrawing needle spring, 19, medical probe, 2, medical probe, 21, guiding needle, 21, guiding instrument, 23 and instrument.

Detailed Description

The following describes embodiments of the present utility model in detail with reference to the drawings. Fig. 3A is a schematic view of the main structure of the applicator in the embodiment of the present utility model. As shown in fig. 3A, the applicator 1 is assembled and has a medical device 2 disposed therein. Fig. 3B is a schematic view showing an exploded state of main parts of the applicator in the embodiment of the present utility model, and the external shape of each part can be seen from fig. 3B.

The present applicator 1 has air tightness, and has a sealing function by a peripheral member mainly comprising a case member, an exposed movable member and a detachable member, specifically a housing 11, keys 12 and a bottom cover 16 in fig. 3A and 3B, respectively, since the function of the applicator 1 is required, the keys 12 are provided in an upper opening 111 of the housing 11, a lower opening 112 of the housing 11 is used for placing the medical device 2, and the bottom cover 16 covers the lower opening 112. The peripheral part further includes an upper sealing structure between the housing 11 and the keys 12, and a lower sealing structure between the housing 11 and the bottom cover 16.

In addition, as the present function of the applicator 1, an inner housing 13 is required for positioning the medical device 2 to the skin, and a moving seat 15 for driving the medical device 2 to the skin and then releasing it, and a withdrawing seat 14 for taking the guide needle after the implantation is completed, and a push spring 181 and a withdrawing spring 182 for providing the implantation power and the withdrawing power, respectively. In addition, a gas absorbing member may be disposed in the bottom cover 16, and a getter 19 is disposed in the gas absorbing member to absorb moisture or oxygen in the applicator 1.

Fig. 4A is a schematic view of a first sealing mode of the embodiment of the present utility model. Fig. 4B and 4C are schematic views of an upper seal structure and a lower seal structure, respectively, of a first seal mode of the embodiment of the present utility model. In the first sealing mode, the sealing structure is an elastic taper side wall sealing structure of the component itself, which is described in detail below.

The upper sealing structure comprises an elastic side wall of a whole circle on the shell 11, the elastic side wall 113 of the shell has a certain taper, the key 12 is also provided with a corresponding key sealing side wall 126 of the whole circle, the shell 11 and the key 12 are assembled according to the position shown in the figure and form interference fit, and after the shell 11 and the key 12 are mutually pressed, the elastic side wall 113 of the shell deforms and expands, but the key sealing side wall 126 is tightly compacted, so that sealing is realized.

The whole circle of elastic side wall of the lower sealing structure is on the bottom cover 16, such as the bottom cover elastic side wall 162 in fig. 3, and is also tapered, the shell 11 is provided with the corresponding whole circle of tapered shell airtight side wall 114, the bottom cover elastic side wall 162 and the shell airtight side wall 114 form interference fit, and after the two are mutually pressed, the bottom cover elastic side wall 162 is deformed and tightly stuck to the shell airtight side wall 114 to realize sealing.

Fig. 5A is a schematic diagram of a second sealing mode of an embodiment of the present utility model. Fig. 5B and 5C are schematic views of an upper seal structure and a lower seal structure, respectively, of a second seal mode of the embodiment of the present utility model.

In the upper sealing structure, the key 12 is provided with a whole circle of key rubber ring groove 125, the upper sealing ring 171 is arranged in the key, the shell 11 is provided with a corresponding whole circle of shell sealing side wall 115, the upper sealing ring 171 is an elastic rubber O-shaped ring, and the upper sealing ring 171 is extruded by the key 12 and the shell 11 to realize sealing. In the lower sealing structure, the shell 11 is provided with a whole circle of shell rubber ring groove 116, the lower sealing ring 172 is arranged in the shell, the bottom cover 16 is provided with a corresponding whole circle of bottom cover sealing side wall 163, the lower sealing ring 172 is an elastic rubber O-shaped ring, and the lower sealing ring 172 is extruded by the shell 11 and the bottom cover 16 to realize sealing.

The choice of materials for the applicator is described below. Although the whole peripheral sealing structure is adopted, firstly gas molecules such as water vapor have very small molecular volume, and the peripheral component is an injection molded plastic part which is sealed on a macroscopic scale, but the molecular gaps on a microscopic level are relatively large, so that the gas molecules slowly permeate. The air permeability of different plastics corresponding to various gases is relatively large, such as water vapor and oxygen, and the air permeability of different plastic materials is shown in the table below. In the application scenario of the embodiment of the utility model, the most influencing medical apparatus is water vapor, and materials with low moisture vapor transmission rate are needed to be selected, and mechanical properties, technological properties and the like are considered, so that the preferred material of the applicator in the embodiment of the utility model is polypropylene PP.

In addition, in the rubber ring sealing structure on the microscopic level, gaps exist between molecules of the rubber ring and between the rubber ring and the plastic, and enough gas molecules penetrate through the gaps, so that the material of the rubber ring also relates to the air permeability of the sealing structure, and the rubber ring material is preferably ethylene propylene diene monomer material because of low air permeability and low friction.

The air permeability can be remarkably reduced by selecting proper plastic materials and rubber ring materials, but if the quality guarantee period is required to be longer, the daily accumulated air permeability can have a considerable influence on the probe of the medical instrument, and a getter needs to be placed inside the applicator 1. In the embodiment of the utility model where the probe effect is derived mainly from moisture, the getter 19 is placed with the preferred desiccant filled therein being a molecular sieve polymer.

The applicator may be triggered only when in use and may not be triggered by mistake in other cases. The applicator 1 in the embodiment of the utility model has a false triggering prevention measure, on one hand, a label with a weak part is adopted to play a role similar to a seal so as to prompt a user that a product is unsealed and the possibility of false triggering exists, and on the other hand, a false triggering prevention structure is adopted, and the false triggering prevention structure is specifically described below.

Fig. 6A is a schematic view of the outer shape of the applicator in the embodiment of the present utility model, and fig. 6B is a schematic view of the outer case of the applicator in the embodiment of the present utility model in a state separated from the bottom cover. In the embodiment of the utility model, the shell 11 and the bottom cover 16 of the applicator 1 are screwed tightly, the label 10 with the anti-disassembly function is stuck on the outer sides of the shell 11 and the bottom cover 16, one half of the label 10 is arranged on the side surface of the shell 11, the other half of the label 10 is arranged on the side surface of the bottom cover 16 and is bonded with the shell 11 and the bottom cover 16, and the label 10 is also provided with a tearing opening serving as a weak part, for example, similar to a row of holes on a stamp, so that the label 10 is more easily broken from the middle when the shell 11 and the bottom cover 16 move relatively. Due to the friction between the threads of the housing 11 and the threads of the bottom cover 16 and the adhesive force of the label 10, the housing 11 and the bottom cover 16 are prevented from being loosened during transport and storage of the applicator 1 or when the user bumps.

When in use, a user needs to exert force to a certain threshold value to unscrew the bottom cover 16 from the shell 11, and at the moment, the label 10 is broken from the middle due to the design of easy tearing and the like, one half of the label is left on the side surface of the shell 11, and the other half of the label is left on the side surface of the bottom cover 16. The tamper-evident label 10 also gives a strong indication to the user that if the label 10 is intact and broken, it will indicate that the product is completely new and unopened, or if the label 10 is broken or misaligned up and down, it will indicate that the applicator product has been used or that the seal has failed, and it will not be used any more.

More important in terms of preventing false triggering is that the exposed key 12 is used as a triggering means of the applicator 1 to prevent false touching of the key 12 when the user does not open the bottom cover 16 but does not intend to use it, or false triggering due to displacement of the key 12 caused by vibration and impact in transportation. For this purpose, a dual anti-premature triggering structure is designed in the embodiment of the utility model. For ease of understanding, the triggering mechanism of the applicator will first be described.

Triggering of the applicator is effected by the key 12, the inner housing 13, the motion base 15. Fig. 7 is a schematic diagram of a structure of a key in an embodiment of the present utility model. Fig. 8A to 8C are schematic views of an inner housing structure of an applicator in an embodiment of the present utility model, in which fig. 8A shows a perspective view of an upper state of the inner housing 13, fig. 8B shows a longitudinal sectional view of the inner housing 13, and fig. 8C shows an inner structure of the inner housing 13. Fig. 9A and 9B are schematic views showing the structure of the motion seat of the applicator in the embodiment of the present utility model, wherein fig. 9A shows a perspective view of the motion seat 15 in a top view, and fig. 9B shows a structure seen from the bottom in the state of fig. 9A, that is, a structure of the bottom of the motion seat 15.

The starting surface triggered by the key 12 is a key pressing surface 121, the key pressing surface 121 is also a surface exposed out of the shell 11, and for convenience of user identification, a pressing mark 122 is also arranged on the key pressing surface 121. The force and action of pressing on the key pressing surface 121 will be transmitted to the triggering ribs 123 on both sides of the key 12, and the end of each triggering rib 123 has a triggering slope 1231. The triggering inclined plane 1231 keeps a certain distance from the inner shell 13 when the key 12 is not pressed down, and when the key 12 is pressed down, the triggering inclined plane 1231 contacts the deformation inclined plane 1311 on the inner shell cantilever 131, and the inner shell cantilever 131 continues to press down, and rotates outwards with the root of the upper edge as the axis, so that the inner shell cantilever buckling position 1312 below the inner shell cantilever 131 is also outwards (transversely in the figure) opened.

Fig. 10A to 10C are schematic views of an implantation process of the applicator according to the embodiment of the present utility model, in which black arrows indicate the movement directions of the respective components. In normal use, i.e. implantation, it is first necessary to open the bottom cover 16. Next, going through the respective state diagrams 10A to 10C in sequence, the user starts to press the key 12 to reach the state of fig. 10B, i.e. the key 12 descends, rotates to open against the inner housing cantilever 131, and then reaches the state of fig. 10C, the motion seat 15 is released, and the push spring 181 pushes the motion seat 15 to implant the medical device 2. The black arrows in the figure represent the direction of movement of the component. The following description is made in connection with specific structures.

In the initial state, the movable base 15 is hooked by the inner housing cantilever 131 with the medical apparatus 2, the movable base hooking surfaces 151 on both sides thereof are just hooked by the inner housing cantilever hooking positions 1312, and the push springs 181 are provided between the inner housing 13 and the movable base 15, and in the initial state, the movable base 15 remains in a fixed position although being forced due to the blocking of the inner housing cantilever 131. When triggering, the inner shell cantilever 131 opens, the inner shell cantilever buckling position 1312 is separated from the moving seat buckling surface 151, the moving seat 15 is triggered and released under the pushing force of the pushing spring 181, the skin is subjected to implantation movement, and the guide needle 21 of the medical instrument 2 is implanted subcutaneously with the probe 23.

The above is a normal triggering and implantation procedure, which is premised on opening the bottom cover 16. Before the bottom cover 16 is opened, a safety structure must be designed to ensure that the motion seat is in the initial position, and normally neither a shock impact nor a depression of the key 12 should result in triggering, i.e. the motion seat 15 should not be caused to disengage from the catch of the inner housing cantilever 131. Therefore, in the bottom cover 16, the embodiment of the present utility model proposes to provide two bottom cover anti-touch ribs 161, which have the dual effects of firstly preventing the false triggering caused by vibration and impact, which is achieved by the bottom cover inner blocking surface 1611 of the bottom cover anti-touch ribs 161, and secondly preventing the false triggering caused by the false pressing of the key 12, which is achieved by the bottom cover upper blocking surface 1612 of the bottom cover anti-touch ribs 161. The following is a description with reference to fig. 11A and 11B.

Fig. 11A to 11C are schematic views of a false triggering prevention structure of an applicator according to an embodiment of the present utility model. Fig. 11A illustrates an internal structure of the bottom cover. Fig. 11B shows the state in which the inner housing outer support rib 132 is engaged with the bottom cover inner blocking surface 1611, and fig. 11C shows the state in which the key lower support arm 124 is engaged with the bottom cover upper blocking surface 1612. As shown in fig. 11B, when the bottom cover 16 is not opened, the bottom cover inner blocking surface 1611 of the bottom cover anti-contact rib 161 blocks the inner cover outer support rib 132 of the inner cover cantilever 131 so that the inner cover cantilever 131 cannot be opened by an outer rotation, thereby preventing the inner cover cantilever 131 from being opened to release the moving seat 15 due to vibration and impact. As shown in fig. 11C, the key lower support arm 124 is blocked by the bottom cover upper blocking surface 1612 of the bottom cover anti-touch rib 161, so that the key 12 cannot be pressed at this time, and cannot be triggered. Only after the bottom cover 16 is opened, the state that the inner cover blocking surface 1611 blocks the outer cover support rib 132 of the inner cover is released, and the state that the upper cover blocking surface 1612 blocks the lower button support arm 124 is released, so that the applicator 1 can be normally triggered and used.

According to the technical scheme of the embodiment of the utility model, the periphery of the applicator consists of a shell part, an exposed movable part and an exposed detachable part, and movable sealing structures are arranged between the shell part and the exposed movable part and between the shell part and the exposed detachable part, so that the whole periphery is airtight. The outer shell part is an outer shell, the exposed movable part is a key, the exposed detachable part is a bottom cover, an upper sealing structure is arranged between the outer shell and the key, a lower sealing structure is arranged between the outer shell and the bottom cover, and the outer shell and the bottom cover form a peripheral integral seal together so as to prevent gas from directly entering the applicator to influence medical equipment. The upper sealing structure and the lower sealing structure can have two movable airtight modes, and the elastic taper side wall sealing structure or the elastic sealing ring structure is preferably an elastic sealing ring structure.

The applicator of the present embodiments also reduces the gas transmission rate through permeation under sealed conditions. For the housing, keys, bottom cover, a plastic material with low air permeability must be chosen, PP material being preferred if it is intended to reduce the moisture vapor transmission rate. For the upper and lower sealing structures, the sealing ring is preferably an O-shaped ring, and the material is preferably ethylene propylene diene monomer rubber. In addition, an anti-pre-trigger structure is arranged in the applicator, and anti-touch ribs are arranged on the bottom cover. When the bottom cover is not opened, the anti-touch ribs can not only prevent the cantilever of the inner shell from being opened so as to avoid false triggering caused by vibration and impact, but also prevent the key from being pressed down in advance so as to avoid triggering of the applicator caused by false key touch.

The above embodiments do not limit the scope of the present utility model. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives can occur depending upon design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included in the scope of the present utility model.

Claims (18)

1. An airtight applicator for applying an implantable medical device to a human body, the applicator comprising a shell component, an exposed movable component, and a detachable component, wherein the shell component has an upper opening and a lower opening, the exposed movable component is arranged at the upper opening, the exposed movable component moves relative to the shell component during the application operation, and the detachable component is detachably arranged at the lower opening, characterized in that: The upper sealing structure is used to seal the upper opening between the shell component and the exposed movable component, and the lower sealing structure is used to seal the lower opening between the shell component and the detachable component. 2. The applicator according to claim 1, characterized in that The upper sealing structure comprises an upper annular sealing groove and an upper sealing ring; The shell member has a sealed side wall, and the sealed side wall surrounds the upper opening of the shell member; The outer circumference or inner circumference of the exposed movable part is in contact with the sealing side wall; The upper annular sealing groove is arranged on the sealing side wall, or on the outer peripheral surface or inner peripheral surface of the exposed movable part; The upper sealing ring is arranged in the upper annular sealing groove, and when the upper sealing ring is fitted, it is squeezed to form a seal for the upper opening between the shell component and the exposed movable component. 3. The applicator according to claim 1 or 2, characterized in that the exposed movable part is a button, which is used to trigger the application operation when it is pressed by an external force. 4. The applicator according to claim 1, characterized in that The lower sealing structure comprises a lower annular sealing groove and a lower sealing ring; The outer circumferential surface of the detachable component and the inner wall of the lower opening of the shell component are fitted together and one of them is provided with the lower annular sealing groove, or the inner circumferential surface of the detachable component or the outer wall of the lower opening of the shell component are fitted together and one of them is provided with the lower annular sealing groove; The lower sealing ring is arranged in the lower annular sealing groove, and is squeezed when the two parts are fitted together, so as to form a seal for the lower opening between the shell part and the detachable part. 5. The applicator according to claim 1 or 4, characterized in that the detachable component is connected to the shell component by a threaded connection. 6 . The applicator according to claim 3 , wherein the detachable component is a bottom cover for covering the lower opening. 7. The applicator according to claim 2 is characterized in that the cross-section of the upper sealing ring is circular and the material is EPDM rubber. 8. The applicator according to claim 4 is characterized in that the cross-section of the lower sealing ring is circular and the material is EPDM rubber. 9. The applicator of claim 1, 2 or 4, wherein the shell member, the exposed movable member, and the removable member are made of plastic. 10. The applicator of claim 9, wherein the plastic is polypropylene. 11. The applicator of claim 6, wherein the shell member is a housing of the applicator. 12. The applicator according to claim 11, characterized in that Anti-tampering labels are attached to the side surfaces of the shell component and the bottom cover, and the anti-tampering labels can increase the connection force between the shell and the bottom cover; A weak portion is provided in the middle of the anti-tampering label. When the outer shell and the bottom cover are subjected to opposite torques, the anti-tampering label is torn at the weak portion, so that the portion originally pasted on the side of the outer shell continues to remain on the side of the outer shell; the portion originally pasted on the side of the bottom cover continues to remain on the side of the bottom cover. 13. The applicator of claim 11, further comprising an internal fixing component, an internal moving component, and a driver, wherein: The built-in fixed component is connected to the built-in moving component before the applicator is triggered; The built-in moving component is used to move the medical device from the inside of the applicator to the skin, and the driver is used to provide a driving force for the movement of the built-in moving component. 14. The applicator of claim 13, wherein: The built-in fixing component is an inner shell; The built-in moving part is a moving seat; The driver is a driving spring; The inner shell has at least one cantilever with a buckle position, which is used to hook the moving seat by the buckle position before the applicator is triggered; the moving seat has at least two rotary arms for clamping the medical device; the driving spring is located between the inner shell and the moving seat. 15. The applicator of claim 14, wherein: The button is provided with a pressing surface, and the pressing surface is exposed to the applicator; At least one trigger rib is also provided below the button; After the bottom cover is removed, when the pressing surface is pressed down by external force, the trigger rib moves downward and can contact the cantilever of the inner shell; the button continues to move downward, and the force is applied to force the cantilever to open horizontally. When the cantilever buckle no longer hooks the moving seat, the moving seat is pushed downward by the driving spring. 16. The applicator of claim 15, wherein: The pressing surface is provided with a pressing mark for the user to identify the pressing position so as to provide the external force. 17. The applicator of claim 16, wherein: The bottom cover is provided with at least one anti-touch rib; A lower support arm is provided below the trigger rib; The outer periphery of the arm of the inner shell is provided with an outer supporting rib; When the bottom cover is connected to the outer shell, the inner side of the anti-touch rib blocks the outer support rib, thereby preventing the cantilever of the inner shell from opening, and the upper end of the anti-touch rib blocks the lower support arm, thereby preventing the trigger rib from triggering downward. 18. The applicator of claim 6, wherein a gas absorbing component is disposed within the bottom cover.