KR102525448B1 - Medical injector with enhanced convenience of syringe attachment and detachment - Google Patents

Abstract

According to the present invention, the medical injector with enhanced convenience of attaching and detaching the syringe is a gun-type medical injector including a barrel fixing unit, a plunger driving unit, and a controller, wherein the plunger driving unit extends the longitudinal direction to the bottom surface of the chamber. A support that slides by being coupled to a guide rail installed along it, a first support wall erected on both sides of the support with a slit therebetween, and having a fitting groove into which the end of the plunger is coupled, and a second through-hole through A plunger mounting portion including a support wall; a driving unit including a motor driven by the control of the controller, a push rod that reciprocates by driving the motor and extends along the guide rail to the plunger holder, and a spring surrounding the push rod; It is mounted between the push rod and the plunger holding part, and the pressing part coupled to the end of the spring while compressing the spring, and the end of the pressing part passes through the through hole of the second support wall and rotates while entering into the slit It is characterized in that it includes a plunger fixing operation unit including a cylinder with a lever protruding on one side of the outer circumferential surface and a cover having an inclined guide at an inclined end of the lever surrounding the outer circumferential surface of the cylinder on the side of the pressing part. .

Description

Medical injector with enhanced convenience of syringe attachment and detachment}

The present invention relates to a medical injector that enhances the convenience of attaching and detaching a syringe, and more particularly, provides a stable plunger driving environment by reciprocating a cradle holding the plunger instead of the plunger itself, and conveniently separates the plunger while firmly fixing the plunger. It is about a medical injector that suggests a structure that can do it.

The syringe consists of a barrel for accommodating the injection solution and a plunger that is coupled to the barrel and injects the injection solution from the cylinder into the needle while reciprocating with a piston.

In the past, it was natural for medical practitioners such as doctors to inject injection into the human body using the above-mentioned syringe, but currently, in the field of skin beauty procedures, where multiple injections are performed at various local points on the face or neck with precise injection and depth. An injector that fixes a syringe and injects the injection solution of the syringe into the human body by setting a detailed injection setting environment such as an injection amount and an injection depth by a drive unit driven by a motor is widely used.

Until recently, it was recognized that injectors could not follow the hands of medical workers, but now, with the rapid development of injector technology, they are in the limelight especially in procedures using injection solutions that require multiple injections with high viscosity.

Domestic Utility Model Registration No. 20-0269476, the injector for integrated drug liquid syringe, has a structure in which the operating rod directly contacts the plunger and reciprocates the plunger by driving the operating rod. According to this technology, the operating rod directly contacts the plunger and reciprocates. Since it moves, there is a problem of causing unnecessary flow of the plunger.

In addition, since the operating rod is in contact with the plunger, when the syringe including the plunger is to be separated from the chamber, the operating rod must be additionally driven to move backward, and unnecessary shock may be applied to the syringe itself during this process.

Therefore, the stability of the plunger is ensured by reciprocally driving the plunger holder holding the plunger, not the plunger itself, and at the same time, the rod in close contact with the plunger is driven by the user's simple operation, so that the plunger can be firmly fixed to the chamber or simply separated. There is a need to develop new and advanced medical injectors with enhanced convenience.

(Registered Utility Model Document 1) Domestic Utility Model Registration No. 20-0269476

The present invention has been made to overcome the problems of the above technology, and provides a stable plunger driving environment by reciprocating a cradle holding the plunger instead of the plunger itself, as well as a structure that can be conveniently separated while firmly fixing the plunger. The main purpose is to provide a medical injector having

Another object of the present invention is to enable a movement line of a lever mounted on a cylinder for fixing a plunger to more naturally follow a direction away from the plunger.

Another object of the present invention is to provide elasticity by forming a reinforcing plate at an end of a cylinder that directly contacts the plunger.

A further object of the present invention is to provide complex improved performance, such as durability, by incorporating various compositions in the stiffening plate.

In order to achieve the above object, the medical injector, which enhances the convenience of attachment and detachment of the syringe according to the present invention, is mounted in a chamber and operates the barrel fixing part for fixing the barrel of the syringe and the plunger of the syringe to transfer the injection solution of the syringe to the human body. A gun-type medical injector including a plunger driving unit for injecting and a controller for controlling driving of the plunger driving unit by manipulating a control button mounted on a handle, wherein the plunger driving unit is disposed on a bottom surface of the chamber in a longitudinal direction. A support that slides by being coupled to a guide rail installed along the guide rail, a first support wall erected on both sides of the support with a slit therebetween and having a fitting groove to which the end of the plunger is coupled, and a first support wall through which a through hole passes. 2 Plunger mount including support wall; a driving unit including a motor driven by the control of the controller, a push rod that reciprocates by driving the motor and extends along the guide rail to the plunger holder, and a spring surrounding the push rod; It is mounted between the push rod and the plunger holding part, and the pressing part coupled to the end of the spring while compressing the spring, and the end of the pressing part passes through the through hole of the second support wall and rotates while entering into the slit It is characterized in that it includes a plunger fixing operation unit including a cylinder with a lever protruding on one side of the outer circumferential surface and a cover having an inclined guide at an inclined end of the lever surrounding the outer circumferential surface of the cylinder on the side of the pressing part. .

In addition, a sub-slanted guide protruding in an inclination parallel to an inclination angle of the inclination guide is installed on an outer surface of the second support wall facing the lever at a peripheral portion of the through-hole.

In addition, the sub-inclined guide is characterized in that it includes a parallel part inclinedly protruding in parallel with the inclination angle of the inclined guide, and a rounding part protruded in a rounded direction from an end of the parallel part in a direction toward the lever.

According to the medical injector that enhances the convenience of attachment and detachment of the syringe according to the present invention,

1) It is possible to pursue the overall improvement of the injection environment by ensuring stable reciprocating motion of the plunger,

2) The syringe can be firmly fixed to the chamber and separated with a convenient and simple operation.

3) By ensuring the movement of the lever for the movement of the cylinder naturally, it not only provides an environment where it can be driven more smoothly and stably,

4) It has the effect of further guaranteeing the stability of the plunger by means of a reinforcing plate with enhanced various performances such as elasticity and durability.

1 is a perspective view showing the overall structure of an injector according to the present invention;
Figure 2 is a perspective view showing a state in which a syringe equipped with a multi-needle is coupled to the injector of the present invention.
3 is a conceptual view illustrating a structure before and after mounting of a plunger fixing operation unit to a plunger mounting unit;
4 is a perspective view showing the structure of a plunger fixing operation unit;
5 is a perspective view showing a structure in which an end of a cylinder enters the fitting slit before lever operation of a plunger fixing operation unit;
Figure 6 is a perspective view showing a structure in which the end of the cylinder is released from the fitting slit after the lever operation of the plunger fixing operation unit.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The accompanying drawings are not drawn to scale, and like reference numbers in each drawing indicate like elements.

1 is a perspective view showing the overall structure of an injector according to the present invention, and FIG. 2 is a perspective view showing a state in which a syringe equipped with multi-needles is coupled to the injector according to the present invention.

Like the known injector of the gun type, the injector of the present invention fixes the syringe (1) to the chamber (11) and then reciprocates the plunger (3) of the syringe (1) to move the barrel (2) of the syringe (1). Provides a structure capable of injecting an injection solution into the human body according to various setting environments provided by the controller 30.

1 and 2, the injector of the present invention is largely composed of a main body 10, a handle 20, and a controller 30.

The main body 10 includes a controller 30 in a state including a chamber 11 accommodating the syringe 1, and the handle 20 has an operating button 21 on a structural base extending from one side of the main body 10. ) Provides a basis for driving the plunger 3 of the syringe 1 fixed/accommodated in the chamber 11 while the user (medical worker) presses the operation button 21.

In addition, the controller 30 controls the reciprocating motion of the plunger 3 in a state where the control panel 31 is mounted on one side of the main body 10 according to the detailed environment set by the manipulation of the control panel 31. Do it.

At this time, the needle 4 of the syringe 1 may be implemented as a multi-needle as shown in FIG. 2, and in this multi-needle, one side of the main body 10 is connected to the section hose 50 to partially inject the injection solution. It can absorb and prevent unnecessary leaks/outflows of the injection solution.

At this time, the main body 10 and the handle 20 are connected with a certain inclination angle like a real gun, not vertically, so that an environment in which a medical practitioner can more conveniently grip can be strengthened.

In the present invention, a configuration that is installed in the chamber 11 to fix the syringe 1 and reciprocally drive the plunger 3 at the same time is referred to as the plunger driving unit 100.

Specifically, in the chamber 11 of the injector of the present invention, it is mounted on the tip of the chamber 11 (the same standard applies to other configurations as a description indicating the direction and site close to the human body), and the barrel of the syringe 1 ( 2) a barrel fixing part 40 for fixing, and a plunger driving part for controlling/manipulating the drive of the plunger 3 while fixing the plunger 3 in a state spaced apart from the barrel fixing part 40 backward at a certain interval 100, and the configuration and operation of the plunger driving unit 100 can be said to be a key component differentiated from known medical injectors.

Configurations shown in FIGS. 1 and 2 but not separately described are the same as corresponding configurations of known injectors, so refer to them.

FIG. 3 is a conceptual diagram illustrating a structure before and after mounting of a plunger fixing operation unit to a plunger mounting unit, and FIG. 4 is a perspective view illustrating a structure of a plunger fixing operation unit.

Referring to FIGS. 3 and 4 , it can be seen that the plunger driving unit 100 of the present invention includes a plunger holding unit 110 , a driving unit 120 and a plunger fixing operation unit 130 .

The plunger holder 110 is coupled to the guide rail 12 installed along the longitudinal direction (the longitudinal direction of the chamber) on the bottom surface of the chamber 11 to be slidably movable along the longitudinal direction of the guide rail 12, It consists of a support 111 and first and second support walls 113 and 114.

The support 111 provides a function of reciprocating the plunger 3 by being coupled to the guide rail 12 described above. In other words, the plunger 3 coupled to the plunger holder 110 is reciprocated by the drive of the drive unit 120 to be described later, and as a result, the plunger 3 also reciprocates while injecting the injection solution in the barrel 2 into the human body. role can be fulfilled.

The support wall is composed of first and second support walls 113 and 114, and these first and second support walls 113 and 114 are formed standing on both sides of the support 111 with a space formed by the slit 112 therebetween.

The first support wall 113 is located at the front end side of the injector, and has a fitting groove 113a for coupling the end of the plunger 3 in a state corresponding to the shape of the end of the plunger 3. .

In a state in which the plunger 3 is fixedly coupled to the fitting groove 113a, it is in close contact with the cylinder 132 to be described later to prevent unnecessary flow when the plunger 3 reciprocates by driving the drive unit 120. possible.

The second support wall 114 is erected on the support 111 in a state spaced apart from the first support wall 113 by the width of the slit 112, and a part of the end of the cylinder 132 to be described later is inserted. A through hole 115 capable of entering the slit 112 is formed therethrough.

The plunger holder 110 pushes the plunger 3 into the barrel 2 while reciprocating with the operation of the driving unit 120 in a state in which the plunger 3 is stably fixed, and the injection solution of the barrel 2 passes through the needle. It provides a basis for infusion into the human body.

Like a known injector, the driving unit 120 includes a motor (not shown), a push rod 121, and a spring 122, and the driving unit 120 of the present invention does not directly contact the plunger 3, but will be described later. It is connected to the plunger holder 110 via the plunger fixing operation unit 130 to provide a characteristic capable of reciprocating the plunger 3 more stably.

Specifically, the motor is driven by the control of the above-described controller 300, and the injection amount of the injection solution, the number of reciprocating motions, the interval driving time, etc. are set in detail in the control panel 31 provided in the controller, and the precision is based on the set value. The plunger 3 can reciprocate while being controlled.

The push rod 121 extends along the guide rail 12 to the plunger holder 110 while being connected to the motor, and reciprocates by driving the motor.

At this time, a spring 122 is wrapped around the outer circumferential surface of the push rod 121 to provide a basis for the push rod 121 to advance toward the front end of the injector and then elastically restore it, which is the principle and structure of a known injector. , so a detailed description is omitted.

As mentioned above, the drive unit 120 can stably reciprocate the plunger 3 without unnecessary fluidity by reciprocating the plunger holder 110 in contact with the plunger holder 110 instead of the plunger 3 itself. function can be provided.

The plunger fixing operation unit 130 is mounted between the push rod 121 and the plunger holding unit 110, and specifically includes a pressing unit 131, a cylinder 132, and a cover 140.

The pressing part 131 is a cylindrical structure coupled while compressing the spring 122 at the end of the push rod 121 or the end of the spring 122 .

That is, the pressing part 131 is coupled to the end of the push rod 121 while applying tension to the spring 122 by pressing one end of the spring 122 wrapped around the push rod 121, a cylinder to be described later (132) provides a basis for elastic movement by manipulation of the lever (133).

The cylinder 132 is rotatably installed at the end of the pressing part 131 while entering the through hole 115 of the second support wall 114 into the slit 112, and as can be predicted with reference to FIG. 3, the push rod The end of 121, more specifically, the end of the pusher 131 coupled to the push rod 121 is also composed of a cylindrical structure that can be contacted/coupled in a state coupled to the push rod 121.

A lever 133 protrudes from one side of the outer circumferential surface of the cylinder 132, so that a user (medical worker) can operate the lever 133 to rotate the cylinder 132 in a specific direction (eg, clockwise). .

Furthermore, the cylinder 132 is a separate coil type between the cylinder 132 and the push rod 121 beyond using the tension force of the spring 122 wrapped around the push rod 121 to ensure an elastic movement force to be described later. It is also possible to restore the original state more easily when the operating force of the lever 133 disappears after elastic rotation by the operation of the lever 133 by adding a spring or leaf spring.

In the previous description, it is described that the pressing part 131 and the cylinder 132 are in direct contact, but in reality, the cover 140 is installed between the pressing part 131 and the cylinder 132, and the cover 140 is a medium. The pressing part 131 and the cylinder 132 are connected.

Unlike the cylinder 132, the cover 140 is coupled to the pressing part 131 so as not to be rotatable, and the pressing part 131 also wraps the end of the spring 122 to prevent rotation, and then attaches an adhesive such as an adhesive. can be fixed through

In addition, the cover 140 is configured to cover a part of the cylinder 132 in a state of having a larger diameter than the cylinder 132, and the end of the lever 133 facing the cylinder 132 among both ends of the cover 140 As a medium, a step occurs due to a difference in diameter between the cover 140 and the cylinder 132 .

At this time, when the diameter of the lever 133 has a diameter corresponding to the above-described step and the end of the cylinder 132 on the side of the second support wall 114, a specific part of the lever 133 moves along the step, resulting in the above-described step. One step may be a kind of guide that determines the movement of the lever 133.

On this basis, one of the key components of the present invention is that the step, that is, the inclined end of the lever 133 among both ends of the cover 140 is treated as one of the key components of the present invention, and in the present invention, this inclined portion is called an inclined guide 141. do.

5 is a perspective view showing a structure in which an end of a cylinder enters the fitting slit before lever operation of the plunger fixing control unit, and FIG. 6 shows a structure in which the end of the cylinder is released from the fitting slit after lever operation of the plunger fixing control unit. It is a perspective view.

Referring to FIG. 5 , in a state in which the lever 133 is not operated, it can be seen that one end of the cylinder 132 has entered the slit 112 by a predetermined length.

The entrance portion of the cylinder 132 on the slit 112 side is in close contact with the bottom surface of the plunger 3 in the syringe 1 to provide a basis for firmly fixing the plunger 3.

That is, since the cylinder 132 is elastically coupled to the push rod 121 via the pressing part 131 connected to the spring 122 or a separate spring, the plunger 3 can easily push or move the cylinder 132. As a result, it performs a function of ensuring a solid fixing state of the plunger 3.

However, if the plunger 3 is tightly coupled in this way, it is not easy to separate the syringe 1 from the chamber 11 of the injector, and if it is forcibly separated, the plunger 3, which is usually made of a flexible plastic material, may be deformed. Problems may follow.

In order to prevent this problem, the present invention, as can be seen in Figure 6, when the cylinder 132 is rotated in the same direction as the operating direction of the lever 133 by operating the lever 133 clockwise, for example, the lever ( 133 moves (rotates) along the inclined guide. In this process, since the inclined direction of the inclined guide is opposite to the plunger 3, the cylinder 132 rotates in a direction away from the plunger 3.

At the same time, while the cylinder 132 is elastically supported by the push rod 121, while compressing the spring 122, the cylinder 132 also moves in a direction away from the plunger 3, so that the end of the cylinder 132 moves away from the plunger 3. ) moves in a direction away from the end (bottom surface) of the chamber 11, and as a result, the syringe 1 including the plunger 3 is released more easily by the cylinder 132 as the force that adheres to the plunger 3 is released. ) can be separated from

In summary, in the injector of the present invention, the driving unit 120 reciprocates not the plunger 3 itself but the plunger holder 110 holding the plunger 3 so that the plunger 3 has unnecessary fluidity (different from the reciprocating direction). Vibration or fine tremor, etc.) are blocked to ensure stability during the reciprocating motion of the plunger (3), as well as ensure a secure fixing force when the plunger (3) is coupled to the chamber (11), while lever 133 Provides convenience in that the plunger 3 can be easily separated from the chamber 11 by easy operation of the.

Additionally, as can be seen in FIG. 4 , on the outer surface of the second support wall 114 facing the lever 133 in the peripheral area of the through hole 115, the sub-protruding obliquely parallel to the inclination angle of the inclination guide 141. It is possible that the inclined guide 116 is installed.

This sub inclined guide 116 prevents the cylinder 132 from moving in a direction away from the plunger 3 along the inclined guide 141 because the lever 133 is leaning towards the second supporting wall 114, In other words, when the lever 133 moves/rotates, the moving path of the lever 133 is precisely designed so that it can rotate more tightly and accurately along the direction away from the plunger 3.

By this sub-sloping guide 116, the lever 133 as well as the cylinder 132 move more accurately in a direction away from the plunger 3, so that the user does not have to rotate the lever 133 while pressing the plunger 3 in the opposite direction. It is possible to provide a base from which the plunger 3 can be easily detached while operating more easily without need.

Furthermore, referring to FIG. 4 in more detail, it can be seen that the sub-slanted guide 116 includes a parallel part 117 and a rounding part 118.

As described above, the parallel part 117 is a portion that protrudes obliquely by a predetermined length so as to be parallel to the inclination angle of the inclined guide 141, and the rounding part 118 is directed toward the lever 133 at the end of the parallel part 117. It includes a rounding part protruding in a rounded (downward convex rounding shape based on FIG. 4) (direction away from the plunger).

According to this, the distance from the inclined guide 141 is narrowed, especially in the area where the rounding part 118 is formed. ) moves in the direction away from the plunger 3, the lever 133 slightly bends and progresses in the direction away from the plunger 3 by the rounding extension of the rounding part 118, accelerating the movement of the lever 133. , it is possible to provide the convenience of operating the lever 133 in a direction away from the plunger 3 more smoothly and smoothly without slipping during movement or hindered by a separate frictional force.

In addition, as can be seen from FIG. 5, the fitting groove 113a may include a plurality of recessed grooves 113b at regular intervals along the extension line.

That is, a plurality of separate additional recesses 113b are formed to fit the shape of the general plunger 3 on the market (the protruding portion of the plunger) so that the protruding portion of the plunger 3 is inserted into the recessed groove 113b. By doing so, when the plunger 3 reciprocates, it provides a characteristic capable of maintaining a state firmly coupled to the fitting groove 113a of the first support wall 113 without unnecessary rotation.

As mentioned above, the end of the cylinder 132 closely adheres to the end (bottom surface) of the plunger 3 and serves to firmly fix the plunger 3, while operating the lever 133 in the plunger fixing operation unit 130. Since it has a property of moving to, structurally, frequent friction with the plunger 3 cannot but occur.

That is, the end of the cylinder 132 may be made of a metal material or a general engineering plastic material, but preferably has elasticity to absorb shock due to contact with the plunger 3 and to ensure durability. do.

To this end, at the end of the cylinder 132, 90 to 99 parts by weight of an elastic material made of an elastic material, polyparaphenylene benzobisoxazole (Poly (p-phenylene benzobisoxazole)) and Karaya gum (Karaya gum) containing It is possible to laminate the reinforcing plate 134 containing 1 to 10 parts by weight of the additive.

That is, the reinforcing plate 134 has a volume corresponding to the volume of the end of the cylinder 132 and a thickness of about 1 to 5 mm in a state of being made of a mixture of an elastic agent and an additive to reinforce the end of the cylinder 132. It can be regarded as a reinforcement with

The elastic material may be made of a known elastic material such as rubber or silicone, and there is no limitation on a specific elastic material.

The additives include poly(p-phenylene benzobisoxa zole) and Karaya gum, and polyparaphenylene benzobisoxazole has 4 strength, modulus of elasticity, heat resistance and flame retardancy. It is an innovative material that simultaneously possesses three extreme performances, and can exhibit high strength, high elasticity, heat resistance, and flame retardancy, thereby exhibiting an effect of improving the physical properties of the reinforcing plate 134 as a whole.

Karaya gum is a substance produced as exudate from a tree of the genus Sterculia growing in India. It has a slight acetic acid odor and is a polysaccharide containing galactose, rhamnose and galacturonic acid as main components. It can contribute to improving adhesion and strength at the same time. Of course, it can contribute to the stabilization of polyparaphenylene benzobixoxazole by performing the function of a stabilizer at the same time.

As these additives are included in the reinforcing plate 134, it is possible to obtain complex physical property improvement effects such as strength, modulus of elasticity, heat resistance, and flame retardancy of the reinforcing plate 134, as well as to obtain the reinforcing plate 134 having a stabilized composition. It provides an effect that

Further, the additive may further include an additional composition other than the above-mentioned composition, and the steps for preparing such an additive are described below.

The additive of the present invention may be prepared through a primary material preparation step (S11), a secondary material preparation step (S12), and an additive completion step (S13).

(S11) Primary material manufacturing step

First, polyhydroxyamide (PHA: polyhydroxyamide) 20 to 50 parts by weight, polyphosphoric acid (PPA: Polyhosphoric acid) 40 to 70 parts by weight, and arabinogalactan 5 to 15 parts by weight 100 to 15 parts by weight A primary material is prepared by stirring for 4 to 10 hours in a nitrogen atmosphere at 200°C.

Polyhydroxyamide introduced here is a precursor for forming polyparaphenylene benzobisoxazole, and polyphosphoric acid serves as a solvent for polyhydroxyamide.

Arabinogalactan is a polysaccharide containing galactose, arabinose, etc. obtained by extracting the roots and stems of pine and western larch. These arabinogalactans can be used as thickeners and stabilizers, and can provide excellent pH stability and salt resistance.

Therefore, as the mixture of polyhydroxyamide, polyphosphoric acid, and arabinogalactan is stirred for 4 to 10 hours in a nitrogen atmosphere at 100 to 200 ° C., thermal cyclization of polyhydroxyamide proceeds and polypara Phenylene benzobisoxazole is synthesized. At this time, arabinogalactan penetrates between polymer particles during the synthesis process, and through arabinogalactan, polyparaphenylene benzobisoxazole with enhanced pH stability and salt resistance can be obtained. The effect of further enhancing the physical properties of the reinforcing plate 134 can be obtained.

(S12) Secondary material manufacturing step

Then, 80 to 95 parts by weight of the primary material and poly(L-lactide)-poly(vinylidene fluoride)-poly(L-lactide) triblock copolymer ) 5 to 15 parts by weight and 3 to 10 parts by weight of amodimethicone are stirred at 80 to 150 ° C. for 1 to 3 hours to prepare a secondary material.

In the secondary material preparation step, a process of adding polylactide-polyvinylidene fluoride-polylactide triblock copolymer and amodimethicone to the above-described primary material is performed. At this time, the thermoplastic polylactide-poly For uniform mixing of the vinylidene fluoride-polylactide triblock copolymer, heating and stirring are preferably performed at 80 to 150° C. for 1 to 3 hours.

The polylactide-polyvinylidene fluoride-polylactide triblock copolymer provides a high level of elastic modulus and at the same time has excellent adhesive strength, thereby improving the elastic force of the reinforcing plate 134 and increasing the adhesiveness between materials. It is a substance that can provide

Amodimethicone is a type of siloxane polymer whose end is substituted with an amino functional group. It has excellent emulsifying properties and enhances the solubility of various components included in the secondary material. It has the advantage of preventing the formation of unnecessary voids on the inside and having excellent thermal stability.

(S13) Additive Completion Step

Finally, 85 to 98 parts by weight of the secondary material, 1 to 5 parts by weight of Karaya gum, and 1 to 10 parts by weight of a mixability improver including sorbitan esters of fatty acids are mixed complete additives.

As described above, karaya gum is a substance that can contribute to improving adhesion and strength at the same time, and at the same time, performs the function of a stabilizer to provide mixability of various components included in the additive and contribute to stabilization.

The mixability improver is characterized in that it contains sorbitan fatty acid ester as an active ingredient, and the sorbitan fatty acid ester is a type of emulsifier obtained by dehydrating 70% of sorbitol and adding fatty acids to esterify the mixture, and is excellent in improving mixability. It is material. Accordingly, the stability of the composition of the additive may be increased by increasing the mixing property between the various resin components included in the additive according to the addition of the miscibility improver.

According to the additive of the present invention as described above, based on polyparaphenylene benzobisoxazole reinforced with arabinogalactan, it is effective to increase all of thermal stability, elastic modulus, strength, and flame resistance, and further Addition of polylactide-polyvinylidene fluoride-polylactide triblock copolymer increases strength and adhesiveness, and amodimethicone increases thermal stability and prevents unnecessary void formation. Of course, it has the advantage of excellent mixing and stability between the substances included.

In order to explain the function of the additive of the present invention, the evaluation results of Examples and Comparative Examples will be compared and described. The examples consist of Examples 1 to 3 for reinforcing plates containing the elastic agent and additives of the present invention, and comparative examples are conventional elastic materials.

<Example 1>

100 g of a primary material was prepared by reacting 30 g of polyhydroxyimide, 60 g of polyphosphoric acid, and 10 g of arabinogalactan in a nitrogen atmosphere at 170° C. for 7 hours.

85 g of the prepared primary material, 10 g of polylactide-polyvinylidene fluoride-polylactide triblock copolymer. 5 g of amodimethicone was stirred at 120° C. for 2 hours to prepare 100 g of a secondary material.

100 g of the additive was prepared by mixing 94 g of the prepared secondary material, 3 g of karaya gum, and 3 g of sorbitan fatty acid ester.

The prepared additive was mixed with polyvinyl chloride resin to prepare an elastic material composition containing 10% by weight of the additive, which was molded into a pad shape having a width of 20 cm, a length of 20 cm, and a thickness of 1 cm.

<Example 2>

100 g of the additive was prepared by mixing 90 g of polyparaphenylene benzobisoxazole and 10 g of karaya gum.

The prepared additive was mixed with polyvinyl chloride resin to prepare an elastic material composition containing 10% by weight of the additive, which was molded into a pad shape having a width of 20 cm, a length of 20 cm, and a thickness of 1 cm.

<Comparative Example>

Polyvinyl chloride resin pad (20 cm wide, 20 cm long, 1 cm thick)

The following tests were conducted on the pads of Examples 1 to 3 and Comparative Example.

49**0

[Experimental Example 1] Evaluation of physical properties

1. Tensile strength and elongation test: UTM (Universal Testing Machine) was used to measure tensile strength and elongation according to KS M 6518.

2. Hardness test: Hardness was measured using a SHORE A TYPE durometer.

3. Restoration rate test: After applying a force of 10N using UTM (Universal Testing Machine), the recovery rate was measured using the thickness recovered within 10 seconds.

4. Resilience test: In order to measure the property of returning to its original form, the average value of five repeated tests was measured according to KS M ISO 8307.

5. Permanent compression set rate test: In order to measure the degree of non-return to the original shape, the permanent compression set rate was measured according to KS M 6518.

The above-described physical property evaluation test results are shown in Table 1 below.

tensile strength
(MPa) elongation rate
(%) Hardness
(HS) restoration rate
(%) resilience
(%) permanent compression
Decrease rate (%) Example 1 163 301 91 97 83 One Example 2 152 285 88 94 80 5 comparative example 82 192 73 84 62 11

As shown in Table 1, it can be seen that Examples 1 and 2 of the present invention are superior in mechanical properties, including tensile strength, elongation, hardness, recovery rate, rebound resilience, and compression set, compared to Comparative Examples.

Furthermore, through comparison of Examples 1 and 2, it can be confirmed that Example 1 has superior mechanical properties, including tensile strength, elongation, hardness, recovery rate, rebound elasticity, and compression set, compared to Example 2.

[Experimental Example 2] Evaluation of flame retardant properties

In order to compare the flame retardant effect of Examples and Comparative Examples, the characteristics of Examples 1 to 3 and Comparative Example were measured by the following method, and the results are shown in Table 2.

- Appearance: The appearance was observed with the naked eye to evaluate whether boiling, bubbles, etc. occurred.

- Machinability: The specimen was bent at 180° to check for cracks, and the deformability of the material was evaluated.

- Flame retardancy: After burning for 60 seconds at 15 cm perpendicular to the lined specimen using a gas torch, the state of the coating film was observed to check whether it was ignited.

- Film thickness before fire burning (T): The film thickness before burning was measured.

- Film thickness after burning (T): The film thickness after burning was measured.

Table 2 is a table showing the flame retardant property test results. Example comparative example One 2 Exterior ○ ○ △ machinability ○ ○ △ flame retardant ○ ○ × before digestion
film thickness 1.5 1.5 1.5 after digestion
film thickness 1.4 1.2 0.8

As shown in Table 2, it can be seen that Examples 1 and 2 of the present invention show relatively excellent results in processability, flame retardancy, and comparison of film thickness before and after digestion, compared to Comparative Examples. In the mutual comparison, it can be confirmed that Example 1 exhibits better flame retardant properties.

Furthermore, the miscibility improver may further include an additional composition in addition to the sorbitan fatty acid ester, and the steps for preparing such a miscibility improver are described with drawings.

The miscibility improver of the present invention may be prepared through the first material preparation step (S21), the second material preparation step (S22), and the mixture improver completion step (S23).

(S21) First material manufacturing step

First, 10 to 25 parts by weight of sorbitan fatty acid ester, 50 to 65 parts by weight of 1,2-hexanediol and 10 to 30 parts by weight of Paeonia Suffruticosa Root Extract are mixed to obtain a first manufacture substances,

As described above, sorbitan fatty acid ester is a kind of emulsifier and is said to be a material with excellent effect of improving the mixing property.

1,2-Hexanediol has a structure of a surfactant containing both a hydrophobic group and a hydrophilic group, so it has an excellent function as a solvent and provides a function as a solvent even in the first material. In addition, by performing the function of a preservative that inhibits or inhibits the growth of microorganisms, there is a function that can prevent deterioration of additives containing Karaya gum.

Peony root extract is extracted from the peel of peony root through various conventional extraction methods such as hot water extraction and subcritical extraction. At this time, there are no restrictions on the extraction method and extraction solvent, so various conventional extraction methods and various solvents can be applied. there is. In the case of such a peony root extract, it has excellent antioxidant and antibacterial functions, and when added to a mixability improver and added to additives, it has an effect of preventing the inhibition of the adhesiveness of the reinforcing plate 134 and further adding antibacterial properties.

(S22) Second material manufacturing step

Next, 80 to 95 parts by weight of the above-described first material, 5 to 10 parts by weight of d-α-Tocopherol Concentrate, and 1 to 10 parts by weight of polyglyceryl-10 oleate A second material is prepared by mixing 10 parts by weight.

d-α-tocopherol is vitamin E contained in vegetable oil, and is a clear, viscous liquid with a specific odor. Tocopherol is a kind of natural antioxidant capable of providing an anti-oxidation function, and performs a function of preventing oxidation of the surface of the reinforcing plate 134 to which such an additive composition is added as well as the mixability improving agent composition and further the additive composition. Of course.

Polyglyceryl-10 oleate is a plant-derived oil-soluble nonionic surfactant, and can further enhance the dispersibility and mixability of various materials as it is added to the mixability improver.

(S23) Mixability improver completion step

Finally, 85 to 95 parts by weight of the second material, 3 to 10 parts by weight of Lactamide MEA, and 1 to 10 parts by weight of Gujeolcho extract are mixed to complete a mixability improver.

Lactamide MEA is a mixture of lactic acid and ethanolamide. It provides a surface-active function to enhance the mixability-enhancing effect of the mixability improver and at the same time increases the viscosity, thereby providing various surfactant components included in the mixability improver. It has the effect of compensating for the decrease in viscosity caused by

Gujeolcho extract is an extract extracted from the outpost of Chrysanthemum sibiricum (= Chrysantehmum zawadskii). This extract is known to have a high antioxidant effect and provides an effect of enhancing antioxidant function through d-α-tocopherol.

According to the miscibility improver of the present invention, it is possible to increase the stability of the composition as well as increase the miscibility of the additive to which the miscibility improver is added, including various components capable of improving the miscibility, and furthermore, the miscibility improving component. Viscosity that may be inhibited by may be also compensated for, and a plurality of anti-oxidation components may be included to prevent deterioration of physical properties due to oxidation of a mixability improver, an additive, and furthermore, the reinforcing plate 134 .

As described above, the configuration and operation of the medical injector with enhanced convenience of attachment and detachment of the syringe according to the present invention are expressed in the above description and drawings, but these are only examples and the spirit of the present invention is not limited to the above description and drawings. And, of course, various changes and modifications are possible within a range that does not deviate from the technical spirit of the present invention.

1: syringe 2: barrel
3: plunger 4: needle
10: body 11: chamber
12: guide rail 20: handle
21: operation button 30: controller
31: control panel 40: barrel fixing part
50: section hose 100: plunger driving unit
110: plunger holder 111: support
112: slit 113: first support wall
113a: fitting groove 113b: recessed groove
114: second support wall 115: through hole
116: sub inclined guide 117: parallel part
118: rounding part 120: driving unit
121: push rod 122: spring
130: plunger fixing control part 131: pressing part
132: cylinder 133: lever
134: reinforcement plate 140: cover
141: slope guide

Claims (7)

A barrel fixing part installed in the chamber for fixing the barrel of the syringe, a plunger driving part for injecting the injection solution of the barrel into the human body by manipulating the plunger of the syringe, and driving the plunger driving part by manipulating the operation button mounted on the handle. In the gun type medical injector including a controller for controlling,
The plunger drive unit,
A first support having a sliding support coupled to a guide rail installed on the bottom surface of the chamber along the longitudinal direction and a fitting groove to which the end of the plunger is coupled as standing on both sides of the support with a slit therebetween a plunger mounting portion including a wall and a second support wall having a through hole;
a driving unit including a motor driven by the control of the controller, a push rod that reciprocates by driving the motor and extends along the guide rail to the plunger holder, and a spring surrounding the push rod;
It is mounted between the push rod and the plunger holding part, and the pressing part coupled to the end of the spring while compressing the spring, and the end of the pressing part passes through the through hole of the second support wall and rotates while entering into the slit It is characterized in that it includes a plunger fixing operation unit including a cylinder with a lever protruding on one side of the outer circumferential surface and a cover having an inclined guide with an inclined end on the lever side wrapped around the outer circumferential surface of the cylinder on the side of the pressing part. , medical injectors. According to claim 1,
On the outer surface of the second support wall facing the lever in the peripheral portion of the through hole,
A medical injector, characterized in that a sub-inclined guide protruding obliquely parallel to the inclination angle of the inclined guide is installed. According to claim 2,
The sub-slope guide,
A medical injector comprising a parallel part protruding obliquely in parallel with the inclination angle of the inclined guide, and a rounding part protruding roundly in a direction toward the lever at an end of the parallel part. According to claim 1,
The fitting groove,
The medical injector, characterized in that it comprises a plurality of recessed grooves formed at regular intervals along the extension line of the fitting groove. According to claim 1,
At the end of the cylinder,
Reinforcing plate containing 90 to 99 parts by weight of an elastic material made of an elastic material and 1 to 10 parts by weight of additives including poly(p-phenylene benzobisoxazole) and Karaya gum A medical injector, characterized in that the laminated formation. According to claim 5,
The additive is
20 to 50 parts by weight of polyhydroxyamide (PHA), 40 to 70 parts by weight of polyphosphoric acid (PPA), and 5 to 15 parts by weight of Arabinogalactan at 100 to 200 ° C. A first material preparation step of preparing a first material by stirring in a nitrogen atmosphere for 4 to 10 hours;
80 to 95 parts by weight of the primary material and polylactide-polyvinylidene fluoride-polylactide triblock copolymer (Poly (L-lactide)-poly (vinylidene fluoride)-poly (L-lactide) Triblockcopolymer) A secondary material preparation step of preparing a secondary material by stirring 5 to 15 parts by weight and 3 to 10 parts by weight of amodimethicone at 80 to 150 ° C. for 1 to 3 hours;
Additives were prepared by mixing 85 to 98 parts by weight of the secondary material, 1 to 5 parts by weight of Karaya gum, and 1 to 10 parts by weight of a mixability improver including sorbitan esters of fatty acids. A medical injector, which is characterized in that it is manufactured through the completion, additive completion step. According to claim 6,
The mixability improver,
A first material is prepared by mixing 10 to 25 parts by weight of the sorbitan fatty acid ester, 50 to 65 parts by weight of 1,2-hexanediol, and 10 to 30 parts by weight of Paeonia Suffruticosa Root Extract. Preparing a first material;
80 to 95 parts by weight of the first material, 5 to 10 parts by weight of d-α-Tocopherol Concentrate, and 1 to 10 parts by weight of Polyglyceryl-10 Oleate are mixed. a second material preparation step of preparing a second material by doing so;
Mixability improver completion step of mixing 85 to 95 parts by weight of the second material, 3 to 10 parts by weight of Lactamide MEA, and 1 to 10 parts by weight of Gujeolcho extract to complete a mixture improver; Characterized in that manufactured, a medical injector.

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