RU2329067C2 - Safe syringe - Google Patents

Abstract

FIELD: medicine.

SUBSTANCE: invention refers to syringes. First version of design implies safe syringe including injector as tube with centre aperture, forming internal container, push rod inserted into injector container by flanged piston, bush with hollow sleeve being hold by injector aperture, needle assembly and sealing element. Sleeve is equipped by upper detachable junction and lower bush in its cavity so that needle base is supplied with connecting insert forming upper detachable junction. Lower push provides connection with flanged push rod. Needle assembly consists of needle base and needle body. Needle base is mounted outside of bush sleeve. Sealing element is made of elastic materials and preliminary formed by bush sleeve, and include external section provided outside of sleeve and forming air-tight connection with internal wall of injector container. Second version implies that needle base is supplied by connecting insert for upper detachable sleeve junction sealing element is furnished with lower bottom bush inside of sleeve for detachable junction with flanged push rod. In third version needle base is mounted outside of bush sleeve, and sealing element inside of sleeve is provided with upper and lower bushes, and needle base is furnished with connecting insert forming upper detachable junction, and lower bush provides connection with flange of pusher rod. In fourth version needle base is mounted outside of bush sleeve, but thus sealing element is equipped with internal threaded section, and forms lower bush inside of sleeve, and needle base is supplied with external threaded section to form connection with external threaded section, and lower bush provides connection with flange of push rod. In fifth version needle base also is mounted outside of bush sleeve, and sealing element is supplied with lower bush inside of sleeve to form connection with flange of push rod.

EFFECT: assemblage simplification, productivity increase, and profitability increase.

15 cl, 18 ex

Description

BACKGROUND OF THE INVENTION

1. The technical field of the invention

In General, the present invention relates to a syringe and, in particular, to a syringe, which to improve safety includes a needle, self-retracting after injection.

2. Description of the Related Art

As shown in FIGS. 17 and 18, the existing safety syringe (Taiwan application 87219129) includes an injector 1, a sleeve 2 placed inside, a needle assembly 3 screwed into the sleeve 2, and a plunger rod 4 moved inside the injector 1. Internal volume the injector 1 is made in the form of a container 101, with which an end hole 102 is connected to the container, and a shoulder 103 is located between the container 101 and the end hole 102. The sleeve 2 is provided with a flange 201 placed on the shoulder 103, the cylinder 202 protrudes outward coaxially from one side flange and in the cylinder 202 is fitted with a ring 203. In addition, a flange 204 is made on the inner surface of the cylinder 202, and a threaded section 205 is made on the other side of the cylinder. The needle assembly 3 consists of the base of the needle 301 screwed into the threaded section 205 and the body of the needle 302 fixed inside the base needles. In addition, the rod of the pusher 4 includes a working rod 401, a piston 402 mounted on the rod 401 and forming an airtight movable connection with the container 101, as well as a protrusion 403, which extends outward (with respect to the piston 402) and can lean on the flange 204 sleeves 2. In the center of the protrusion there is a slot 404, which ensures the elasticity of the protrusion 403. When the sleeve 2 is inserted into the container 101, the cylinder 202 is inserted into the end hole 102 and the flange 201 abuts the shoulder 103, the rod of the pusher 4 can be inserted into the container 101 until it stops sleeve 2 but lined unitary enterprise 403 cannot pass through the flange 204, it secures the sleeve 2. Then the assembly is completed by screwing the base of the needle 301 through the end hole 102 of the injector 1 through the end hole 102. The described syringe has the following disadvantages:

1. Since the sleeve 2 and the sealing ring 203 are made as two separate parts, for their manufacture and subsequent assembly requires two independent devices, which leads to a rise in the cost of construction.

2. Due to the small size of the ring 203, its manual assembly is difficult. However, during mechanical assembly, the ring falls out and is damaged, due to its elasticity. In addition, in the event that the ring 203 is stuck in the mechanical assembly device, it is necessary to spend time on readjustment.

3. During assembly, it is necessary that the rod of the pusher 4 was inserted into the container 101 of the injector 1 to fix the sleeve 2, only after that the sleeve 2 can freely connect to the node of the needle 3, which leads to inconvenience during assembly.

4. The total number of parts increases, since the o-ring 203 is made separately from the sleeve 2. Meanwhile, the slot 404 should be located in the center of the protrusion 403 so that the protrusion 403 could freely pass through the flange 204.

5. Two separate elements: sleeve 2 and the base of the needle 301, can reliably connect only by assembly. The sleeve 2 should rotate freely relative to the base of the needle 301, thus, the base of the needle 301 can be freely screwed into the threaded portion 205 of the sleeve 2.

SUMMARY OF THE INVENTION

The present invention provides an easy-to-assemble safe syringe, the mechanical assembly of which eliminates the loss of parts and improves productivity.

In addition, the present invention provides a safe syringe in which the sleeve automatically deflects the needle body in response to an effect caused by the needle body sliding into the injector.

The present invention also provides a safe syringe in which the sleeve and needle assembly are integrally formed, which reduces the number of parts and assembly steps.

The syringe of the present invention includes an injector placed inside the sleeve, a needle assembly screwed into the sleeve, and a movable plunger rod inside the injector. The main technological feature consists in a sealing element made of elastic materials, which is preformed and directly on the sleeve of the sleeve and the outer section of which is outside the sleeve and forms an airtight movable connection with the inner wall of the injector container. Thus, when the pusher rod approaches the sleeve, the protrusion forms a connection of the pusher rod with the sleeve.

Various models of the sealing element can be used, for example, closed only on the outside of the sleeve, or the shape of which is due to the use of the lower sleeve, or the upper / lower sleeve, or the upper threaded portion / lower sleeve. And between the lower sleeve and the inner cavity, an intermediate shoulder can be installed.

BRIEF DESCRIPTION OF THE DRAWINGS

1 is an exploded view of a preferred embodiment of the present invention.

Figure 2 shows a perspective view of the sleeve of figure 1.

Figure 3 shows an exploded view of a second preferred embodiment of the present invention.

4 is an exploded view of a third preferred embodiment of the present invention.

Figure 5 shows a perspective view of the sleeve of figure 4.

Figure 6 shows a section along the line 4-4 of figure 4.

7 shows a section of the sleeve and the node of the needle in the injector.

On Fig shows a diagram of the handling of the rod of the pusher to secure the protrusion in the sleeve.

Figure 9 shows another diagram of the extension of the rod of the pusher for drawing the needle into the injector.

Figure 10 shows the cross section of the sleeve when working with an inclined shoulder.

Figure 11 shows the diagram of figure 10 when pulling the rod of the pusher to retract the needle into the injector.

12 is an exploded sectional view of a fourth preferred embodiment of the present invention.

13 is a cross-sectional view of a fourth preferred embodiment of the present invention.

On Fig shows a cross section of a fifth preferred embodiment of the present invention.

FIG. 15 shows a sectional view of a fifth preferred embodiment of the present invention.

On Fig shows a monolithic version of the piston rod of the pusher.

On Fig shows a perspective view of the elements of a safe syringe.

On Fig shows a section of a safe syringe.

DETAILED DESCRIPTION OF THE INVENTION

The features and advantages of the present invention are better understood after a thorough discussion of the following detailed description of a preferred embodiment of the present invention with reference to the accompanying drawings.

As shown in FIGS. 1-2, a safety syringe according to a preferred embodiment of the present invention includes an injector 10, a sleeve 20 placed inside the injector 10, a needle assembly screwed into the sleeve 20, and a movable plunger rod 40 inside the injector 10.

The cylindrical injector 10 consists of a tube 11 surrounding the L axis to form a container 111, and a transition tube 12 fixed at the end of the tube 11. A small hole 121 is made inside the transition tube, which communicates with the container 111, while at the boundary of the hole and the container 111 the stop 13 and the groove 14 are located.

A hollow tubular sleeve 20, including a sleeve 21 and a sealing element 22 preformed on the sleeve 21, is placed inside the injector 10 from the side of the opening of the container 111 opposite the hole 121. The sleeve 21 has a flange 221 that abuts against the stop 13. The sealing element 22, made of elastic materials, for example from rubber, is cast directly into the flange 221 of the outer sleeve 23, while the outer diameter D of the sealing element 22 is larger than the diameter of the flange 221 of the corresponding sleeve 21. Thus, the sealing element 22 can be inserted insert into the groove 14 inside the injector 10 to provide an elastic airtight seal. In addition, the sleeve 21 is provided with an upper detachable joint 213 (in this example, an internal thread) made in the hole 210, and a lower sleeve 215.

The needle assembly 30 consists of the base of the needle 31, the body of the needle 32, fixed inside the base of the needle 31, and the cap 33 for the base of the needle 31 and the body of the needle 32. In addition, on the outer surface of the sleeve 21 there is a thrust ring 312, the base of the needle 31 is provided with a connecting an insert 311 that can be inserted into the hole 121 and form the upper detachable connection 213.

The rod of the pusher 40, which is inserted into the container 111 inside the injector 10, includes a working rod 41, a piston 42, placed at the end of the rod 41 and tightly entering the container 111, as well as the protrusion 43, which is located outside (relative to the piston 42) and can be caught by the lower sleeve 215. When the protrusion is captured by the lower sleeve 215, the plunger rod 40 and the sleeve 20 may form a fixed connection.

As shown in FIG. 3, the safety syringe of the second preferred embodiment of the present invention has a structure similar to that of the syringe of the first embodiment. The difference lies in the sealing element 22 with the lower sleeve 216 inside the sleeve 21, used to form a connection with the protrusion 43 of the rod of the pusher 40.

As shown in FIGS. 4-6, the safety syringe according to the third preferred embodiment of the present invention includes an injector 14, a sleeve 20 mounted inside the injector 14, a needle assembly screwed into the sleeve 20, and a movable plunger rod 40 inside the injector 14.

The cylindrical injector 14 consists of a tube 11 surrounding the L axis to form a container 111 and a transition tube 12 mounted at the end of the tube 11. A small hole 121 is made inside the transition tube, which communicates with the container 111, while at the boundary of the hole and the container 111 placed emphasis 13 and the groove 10.

A hollow tubular sleeve 20 including a sleeve 21 and a sealing element 22 preformed on the sleeve 21 is placed inside the injector 10 from the opening side of the container 111 opposite the opening 121 to provide an elastic airtight seal. The sleeve 21 consists of an outer sleeve 23 made of hard plastic (for example, from PP material) and an elastic element (for example, made of rubber) installed inside the outer sleeve 23. The outer sleeve 23 is equipped with a flange 231 that abuts against the stop 13; tube 232 protrudes from one side of flange 231; the outer surface 233 surrounds the axis L and mates with the flange 231; opposite the outer surface 233 is the inner surface 234. The flange 231 is equipped with radial channels 235 and supports 236 between the channels 235. The inner sleeve 24 provides a smooth flow through the channel 235, while the airtight sealing element 22 expands inward along with the inner annular surface 241 surrounding axis L. The inner annular surface is formed by a lower sleeve 242, mating with the container 111 and protruding towards the axis L, the upper sleeve 243, opposite the lower sleeve 242, also protruding well, the L axis, and the container 244 located between the lower and upper bushings 242, 243 away from the L axis, as well as the shoulder 245 at the border of the lower sleeve 242 and the container 244 together with the conical guide 246, mating with the container 111 and placed on one side of the lower bushings 242. A sealing element 22 made of elastic materials, such as rubber, is cast directly into the flange 231 of the outer sleeve 23, while providing an excellent connection between the flange 231 and the inner sleeve 24 using the channel 235 (see 7) and a fixed connection of the sleeve 24 with the support 236 is provided. Meanwhile, the outer ring can be placed on the outer surface 233, while the inner ring is connected to the inner sleeve 24, and the outer diameter D of the sealing element 22 is larger than the diameter of the outer surface 233 corresponding outer sleeve 23.

The needle assembly 30 consists of the base of the needle 31, the body of the needle 32 mounted inside the base of the needle 31, and the cap 33 for the base of the needle 31 and the body of the needle 32. In addition, a stop ring 312 is made outside the tube 232, which can be used as a stop for the cap 33 , the base of the needle 31 is provided with a connecting insert 311, which can be inserted into the hole 121 and form a detachable connection 331 inside the container 233 when passing through the second sleeve 243.

The pusher rod 40, which is inserted into the container 111 inside the injector 10, includes a working rod 41, a piston 42 mounted on the rod 41 and forming an airtight connection with the container 111, as well as a protrusion 43, which is placed on the outside (relative to the piston 42) and can be captured by the container 244 after it passes through the first sleeve 242. The minimum outer diameter of the protrusion is larger than the inner diameter of the lower sleeve 242. And due to the material properties of the inner sleeve 24, the protrusion 43 can form a reliable the connection with the sleeve 20 after it passes through the first sleeve 242.

As shown in FIG. 7, during assembly, the connecting insert 311 of the needle assembly is first inserted into the hole of the round pipe 232 of the sleeve 20, and the smooth connecting of the connecting insert 311 through the second sleeve 243 is ensured, using the material properties of the inner sleeve 24, thereby providing connecting the needle assembly to the sleeve 20. Then, the sleeve 20 and the needle 30 with the cap are inserted into the opening of the container 111 and subsequently into the injector 10 when centering the body of the needle 32 and the cap 33 through the hole 121. When the sealing element 22 is inserted into the channel taste 14, and the flange 231 abuts against the stop 13, the sleeve 20 and the needle assembly 30 can be placed inside the injector 10. Finally, the assembly can be completed when one end of the rod of the pusher 40 with the piston 42 and the protrusion 43 enters the container 111, which ends with a sealing element 22 and sleeve 21.

As shown in Fig. 8, when the injector must be disposed of after the injection, the operator only needs to push the rod of the pusher 40 into the injector 10, while the protrusion can smoothly pass through the first sleeve 242 to the container 244, using the material properties of the inner sleeve 24, thus ensuring the connection of the plunger rod 40 and the sleeve 20. As shown in FIG. 9, when the plunger rod 40 is pulled out of the injector 10, the plunger rod 40 pulls the sleeve 20 and the needle assembly 30 into the injector 10 until the needle body 32 and cap 33 e disappear within the injector. In this case, the rod of the pusher 40 can be broken without causing harm to personnel.

As shown in FIG. 10, an inclined shoulder 245 ′ is formed on the inner surface of the ring 241 ′ of the inner sleeve 24 ′ of the sleeve 20 ′ at the boundary between the lower sleeve 242 ′ and the container 244 ′. An inclined hole 247 'is made in the lower sleeve 242' surrounding the inclined axis L ', the inclination of which to the axis L is approximately 20 ° and which extends at right angles to the inclined shoulder 245'. As shown in FIG. 11, when the rod of the plunger 40 forms a connection with the sleeve 20 ′ by the protrusion 43, the configuration of the inclined hole 247 ′ can provide one-way compression of the inner sleeve 24 ′ by the protrusion 43. In the meantime, due to the sealing element 22 'of the injector 10, the initial one-way compression pressure can be relieved when the rod of the pusher 40 extends outward from the injector 10 (the cap is removed first). And due to the material properties of the inner sleeve 24 'and the presence of the inclined hole 247' and the inclined shoulder 245 ', the maximum shift can occur when the sleeve 20' and the body of the needle 32 'are inserted into the injector 10 (in this case, the inclined hole 247' can be deformed by the protrusion 43 as a result of compression). Finally, as soon as the body of the needle 32 abuts against the stop 13, the rod of the pusher 40 breaks, while avoiding the possible extension of the body of the needle 32.

As shown in FIGS. 12-13, the safety syringe according to the fourth preferred embodiment of the present invention also includes an injector 10, a sleeve 20 mounted inside the injector 10, a sealing element 22 providing an airtight seal, a needle assembly 30 screwed into the sleeve 20, and movable the rod of the pusher 40 inside the injector 10, while the injector 10 and the rod of the pusher 40 have the same design as in the third example. The following describes the features of the sleeve 20 and the node of the needle 30.

The difference is that the sealing element 22 has both an internal thread 217 inside the sleeve 21 and a lower sleeve 216. Thus, the base of the needle 31 provided with an external thread 311 can fit inside the thread 217 of the sealing element 22, while the lower the sleeve 216 can be used to form the connection of the protrusion 43 with the rod of the pusher 40.

As shown in FIG. 14, the safety syringe according to the fifth preferred embodiment of the present invention also includes an injector 10 ″, a sleeve 20 ″ mounted inside the injector 10 ″, a needle assembly screwed into the sleeve 20 ″ and a movable plunger rod 40 ′ 'inside the injector 10' ', while the injector 10' 'and the rod of the pusher 40' 'have the same design as in the third example. The following describes the features of the sleeve 20 "and the body of the needle 30".

The sleeve 20 ″ includes a sleeve 21 ″, a sealing element 22 ″ preformed on the sleeve 21 ″, and a fixed base of the needle 25 ″. The sleeve 21 ″ consists of an outer sleeve 23 ″ made of hard plastic and an elastic inner sleeve 24 ″ mounted inside the outer sleeve 23 ″. The outer sleeve 23 ″ consists of a flange 231 ″ abutting against an abutment 13 ″, a round tube of smaller diameter 232 ″ extending beyond the flange 231 ″, the outer surface 233 ″ surrounding the axis L and corresponding to the flange 231 ″ as well as the inner surface 234 located opposite the outer surface 233 ''. The flange 231 ″ is pre-installed with some radial channels 235 ″, while the inner sleeve 24 ″ has an inner annular surface 241 ″ surrounding the axis L. The inner annular surface is formed by a sleeve 242 ″ mating with the container 111 ″ and protruding toward the axis L, with a container 244 ″ on one side of the sleeve 242 ″ located at a distance from the axis L. A rubber element 22 ″ made of rubber is cast directly into the channel 235 ″, forming an airtight seal. In addition, the outer ring can be placed on the outer annular surface 233 ″, while the inner ring is combined with the inner sleeve 24 ″, and the outer diameter D of the sealing element 22 ″ is larger than the diameter of the outer annular surface 233 ″ corresponding to the outer sleeves 23 ''.

The body of the needle 30 ″ is directly attached to the base of the needle 25 ″ of the sleeve 20 ″ and extends beyond the injector 10 ″.

Thus, the device according to the fifth preferred embodiment of the present invention includes a sleeve 21 ″, a sealing element 22 ″ and a needle base 25 ″, which minimizes the number of structural elements and inconvenience in manufacturing and assembly. Assembly is carried out by installing the body of the needle 30 ″ in the base of the needle 25 ″. For comparison: an existing syringe can be screwed in only after rotation of the base of the needle and the sleeve, and the present invention, which proposes to reduce the number of parts, can actually simplify the assembly procedure.

The syringe shown in FIG. 15 is similar to the syringe according to the fifth preferred embodiment of the present invention: the inner sleeve 54 and the inner annular surface 541 of the sleeve 50 are also provided with an inclined shoulder 545 between the sleeve 542 and the container 544. The sleeve 542 is provided with an inclined hole 547 surrounding the inclined axis L, which extends at right angles to the inclined shoulder 545. When the sleeve 50 and the needle body 60 are retracted into the injector, the needle body 60 is retracted inwardly guaranteed (as in FIG. 11).

On Fig shows a universal design, which includes a piston 42 of the rod of the pusher 40, formed previously directly from one end of the rod of the pusher 40, where for reliability made round convex rib 421.

In summary, the safe syringe according to a preferred embodiment of the present invention has the following advantages:

1. Two combined elements: the sealing element 22 and the sleeve 21 together form a sleeve, providing ease of manufacture and assembly of a simplified design. Due to the properties of the elastic sealing element 22, the protrusion 43 and the connecting insert 311 can be smoothly installed and securely attached.

2. The sealing element 22 and the sleeve 21 made as a single unit can be manufactured using only one machine without additional assembly, thus providing cost savings.

3. Neither mechanical nor manual assembly is necessary, because to increase profitability, the sealing element 22 is pre-molded directly on the sleeve 21. In addition, the advantages of the non-separable design are that the sealing element 22 does not fall out, which increases the efficiency by reducing the proportion defects and downtime.

4. When assembling, the sleeve 20 and the needle assembly 30 are first connected and then they are installed in the injector 10. This process is carried out easily and quickly, which significantly increases the productivity of the assembly.

5. The number of structural elements can be minimized, since the sealing element 22 is pre-formed directly on the sleeve 21. And due to the material properties of the inner sleeve 24, no gap is needed for the protrusion 43. In fact, assembly can be performed by the same machine.

6. The outer sleeve 23 and the support 236 made of material PP can be used to support the inner sleeve 24 and the sealing element 22 made of rubber, which provides a reliable connection and retraction when the protrusion 43 of the rod of the pusher 40 is inserted into the sleeve 20.

Thus, the safety syringe of the present invention consists of an elastic sealing element and a sleeve, thereby providing air tightness and simplifying assembly and increasing productivity, increasing profitability.

Claims (15)

1. A safe syringe that includes an injector in the form of a tube with a hole in the center that forms the inner container, a pusher rod that is inserted into the injector container with a piston with a protrusion, a sleeve with a hollow sleeve that can be caught by the injector hole, the sleeve being equipped with an upper detachable connection and a lower sleeve made in its cavity so that the base of the needle is equipped with a connecting insert forming the upper detachable connection, and the lower sleeve provides connection with the protrusion of the pusher rod, the needle assembly It consists of the base of the needle and the body of the needle, while the base of the needle is installed outside the sleeve of the sleeve, characterized in that a sealing element made of elastic materials is formed previously on the sleeve of the sleeve, and includes an outer portion that is formed outside the sleeve and forms an airtight connection with the inner wall of the injector container. 2. The safe syringe according to claim 1, characterized in that an inclined shoulder is placed between the lower sleeve and the cavity of the said sleeve. 3. The safe syringe according to claim 1, characterized in that said pusher rod piston is formed previously directly from one end of the pusher rod. 4. A safe syringe that includes an injector in the form of a tube with a hole in the center forming an inner container, a rod of a pusher that is inserted into the injector container with a piston with a protrusion; a sleeve with a hollow sleeve that can be gripped by an injector hole, the sleeve being equipped with an upper detachable joint formed in the cavity, the needle assembly consists of a needle base and a needle body, the needle base being provided with a connecting insert for forming the upper sleeve detachable, characterized in that a sealing element made of elastic materials is formed previously on the sleeve of the sleeve, and includes an outer portion that is formed on the outside of the sleeve and forms an airtight c unity with the inner wall of the injector of the container, wherein the sealing member is provided with a lower hub within the sleeve to form a releasable connection with the protrusion of the pusher rod. 5. The safe syringe according to claim 4, characterized in that an inclined shoulder is placed between the lower sleeve and the cavity of the said sleeve. 6. The safe syringe according to claim 4, characterized in that said plunger rod piston is formed previously directly from one end of the plunger rod. 7. A safe syringe that includes an injector in the form of a tube with a hole in the center forming an inner container, a pusher rod that is inserted into the injector container with a piston with a protrusion, a sleeve with a hollow sleeve that can be caught by the injector hole, the needle assembly consists of a needle base and body of the needle, while the base of the needle is installed outside the sleeve of the sleeve, characterized in that the sealing element made of elastic materials is formed previously on the sleeve of the sleeve, and includes an outer portion that formed outside the sleeve and forms an airtight connection with the inner wall of the injector container, while the sealing element inside the sleeve is equipped with upper and lower bushings, and the base of the needle is equipped with a connecting insert forming the upper detachable connection, and the lower sleeve provides connection with the protrusion of the pusher rod. 8. The safe syringe according to claim 7, characterized in that the inclined shoulder is placed between the lower sleeve and the cavity of the said sleeve. 9. The safe syringe according to claim 7, characterized in that said plunger rod piston is formed previously directly from one end of the plunger rod. 10. A safe syringe that includes an injector in the form of a tube with a hole in the center forming an inner container, a pusher rod that is inserted into the injector container with a piston with a protrusion, a sleeve with a hollow sleeve that can be caught by the injector hole, the needle assembly consists of a needle base and body of the needle, while the base of the needle is installed outside the sleeve of the sleeve, characterized in that the sealing element made of elastic materials is formed previously on the sleeve of the sleeve, and includes an outer portion that formed outside the sleeve and forms an airtight connection with the inner wall of the injector container, wherein the sealing element is provided with an internal threaded portion and forms a lower sleeve inside the sleeve, and the base of the needle is provided with an external threaded portion to form a connection with the external threaded portion, and the lower sleeve provides a connection with protrusion of a rod of a pusher. 11. A safe syringe according to claim 10, characterized in that an inclined shoulder is placed between the lower sleeve and the cavity of the said sleeve. 12. The safe syringe according to claim 10, characterized in that said plunger rod piston is formed previously directly from one end of the plunger rod. 13. A safe syringe that includes an injector in the form of a tube with a hole in the center forming an inner container, a pusher rod that is inserted into the injector container with a piston with a protrusion, a sleeve with a hollow sleeve that can be caught by the injector hole, the needle assembly consists of a needle base and body of the needle, while the base of the needle is installed outside the sleeve of the sleeve, characterized in that the sealing element made of elastic materials is formed previously on the sleeve of the sleeve, and includes an outer portion that It formed on the outside of the sleeve and forms an airtight connection with the inner wall of the injector of the container, wherein the sealing member is provided with a lower hub within the sleeve to form a compound with the protrusion of the pusher rod. 14. The safe syringe according to item 13, wherein the inclined shoulder is placed between the lower sleeve and the cavity of the said sleeve. 15. The safe syringe according to item 13, characterized in that the said piston rod piston is formed previously directly from one end of the pusher rod.

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