WO2022245308A1

WO2022245308A1 - Auto injector with protective feature triggered by dermal contact

Info

Publication number: WO2022245308A1
Application number: PCT/TR2021/050562
Authority: WO
Inventors: Ahmet OKUDAN; Adem Şahi̇n; Can CAKAR; Mehmet Numan HAKSAL; Güniz ÇAKAR
Original assignee: Centuri̇on İlaç Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇
Priority date: 2021-05-17
Filing date: 2021-06-09
Publication date: 2022-11-24

Abstract

This invention relates to an auto injector (24) with protective feature and needle protection triggered by dermal contact.

Description

AUTO INJECTOR WITH PROTECTIVE FEATURE TRIGGERED BY DERMAL

CONTACT

Technical Field

This invention relates to an auto injector with protective feature and needle protection triggered by dermal contact.

Prior Art

Injection devices are divided into three categories: manual, automatic and semi-automatic. In a conventional manual injection device, the patient pricks the needle into himself with a certain thrust force. Likewise, this process is provided moving by manually or driving by pressing any mechanism for injecting the medicine in the syringe. This method has many disadvantages. The first of these, the needle is inserted into the skin as much as the patient applies force. If this process is performed with a low force, there is a possibility that the medicine will not penetrate under the skin. On the other hand, in this process, the patient will experience problems such as finishing the process or not being able to inject the medicine completely, as the patient will feel pain when the needle enters the skin. In addition, the inability to adjust the dosage is also a negative effect. The purpose of auto injectors is to quickly insert the needle into the skin at a certain distance and to inject the liquid into the body with a certain dosage.

There are many difficulties and considerations in the implementation of an injection process. One of the most important situations to be considered is the healthy concealment/disposal of the needle after the injection process. Since the sterilization of the needle is lost after the injection to the patient, it poses a danger to medical personnel and other people. Many auto injectors have parts and equipment used to retract or hide the needle. But since some products have mini DC motors and gear wheels, the cost of manufacturing, installation, workmanship and production is quite expensive. This situation is reflected in the sales prices. The secondary objectives of an auto injector should be easy manufacturability, easy installation and low cost. Due to the deterioration of the contained medicine fluid or the product becoming unusable after a while, auto injectors should be designed and manufactured to a level that everyone can afford.

In auto injectors, helical springs are used to trigger the needle and inject the medicine fluid. In accordance with strength characteristics of the springs, the force applied decreases linearly from a compressed state until they reach their free size. This creates the necessity to use quite long springs in the device. If the spring length is too long, it causes problems such as buckling the spring during compression and coming out of its slot or getting stuck in other parts of the device. Therefore, in such systems, springs should be supported between bearings in a guide. Even if springs are a difficult system to implement for auto injectors, they are still very preferred because they are very low cost compared to products that are driven by electric motors.

In the International patent document numbered WO 2010/0264614 of the prior art, an injection device is mentioned. In the said document, there is information about the syringe safety apparatus, protection caps or mechanisms, safe usage methods of syringes of injection devices. However, the syringe safety apparatus in the state of the art, are different from the invention subject to application.

The auto injector in the invention subject to the application enables that it is easily applied even in housing of shock with the least effort and minimizes the infection risk.

In the current art, there is no explanation regarding the technical features of the invention subject to application and the technical effects provided by the invention subject to application. In current applications, there is no auto injector that allows it to be applied easily even in housing of shock and minimizes the infection risk with minimum effort.

Purposes of the Invention

The purpose of this invention is to perform an auto injector that provides an easy-to-use automatic injection and minimizes the risk of infection.

Another purpose of this invention is a single-step injector and to perform an auto-injector that performs the tasks of pricking, injecting the medicine and storing the needle, respectively, with only dermal contact.

Another purpose of this invention is to perform an auto injector with fewer parts than existing products, with low production, workmanship and installation costs.

Another purpose of this invention is to perform an auto injector that is dimensionally more compact than most of the existing products.

Another purpose of this invention is to perform an auto-injector, in which in the process of injecting the medicine under the skin, it is enough to gently press the device into the skin with a certain force.

Another purpose of this invention is to perform an auto injector simulated by modeling with working conditions, finite elements analysis with nonlinear contact pairs and nonlinear realistic material models.

Another purpose of this invention is to perform an auto injector in which installation errors are prevented and thus the possibility of the product not working is greatly reduced, since it is designed with Poka-yoke (error proofing) methods.

Another purpose of this invention is to perform an auto injector that comprises adjustment units which are capable of subcutaneous needle penetration of 23 mm for adults and 14 mm for children.

Another purpose of this invention is to perform an auto injector whose 0.33 cc medicine dosage is optimized with the operating principles of the product and prevents more or less liquid dosages. Another purpose of this invention is to perform an auto injector that hides the needle by moving the protection booms as soon as the product is lifted from the skin at the end of the process and does not require any additional instructions or manual movement for the needle protection/concealment process.

Summary of the Invention

An auto injector, defined in the first claim and other claims related to this claim made to achieve the purpose of this invention, is related to an auto injector which has the following actuating mechanisms for the automatic injection of a single-use medicine dose into the human body, with the system that hides the syringe needle after injection with the following mechanisms to prevent injury and infections. A housing that will allow a syringe to be held and moved in linear direction, the first actuating spring holder connected to this housing, the first actuating spring, the position locking part to which the holder of the first actuating spring contacts, is used with the task of penetrating the syringe needle into the human skin. The outer housing to which the position locking part is connected, is connected to the upper cap holding the second actuating spring. The second actuating spring under tension which contacts the upper cap, is connected to the part of the rotational rod that allows the medicine in the syringe to be injected from the syringe needle. The rotational rod is stuck between the upper cap and the housing. By manually removing the lower cap on the device, the device becomes operational. The actuating part, which is pushed with some force by contacting the skin, tilts the struts in the outer housing, allowing the housing part to be released. The housing is pushed by the first actuating spring, allowing the syringe needle to penetrate the human body. With the movement of the housing, the rotational rod, which is stuck between the housing and the upper cap, is released and is driven by the second actuating spring and injects the medicine in the syringe into the human body by pressing on the syringe stopper. Upon completion of the injection process, with the displacement of the actuating part, the free protection telescope inner boom is opened by driving from the safety actuating spring, and drives the protection telescope outer boom. The protection telescope inner boom and the protection telescope outer boom are opened by driving and serve to hide the syringe needle inside the device. After these process steps, the auto injector completes its task. Detailed Description of the Invention

The auto injector realized to achieve the purpose of this invention is shown in the attached figures, in which;

Figure 1. is the perspective view of the assembly of the auto injector. Figure 2. is the view of another sectioned version of the assembly of the auto injector. Figure 3. is the perspective view of the exploded version of the assembly of the auto injector. Figure 4. is the perspective view of the exploded version of the outer housing and the lower cap. Figure 5. is the perspective view of the outer housing Figure 6. is the view of the sectioned version of the outer housing Figure 7. is the sectional view of the area where the struts of the outer housing and lower cap are mounted.

Figure 8. is the detailed view of the position stopper that controls the position of the housing part and contact wall of struts.

Figure 9. is the front view of the struts of the outer housing and the Poka-Yoke conduits.

Figure 10. is the rear view showing the stopper section that stops the actuating part with the injection position stopper of the housing part of the outer housing.

Figure 11. is the perspective view of the stopper section stopping the struts actuating part of the outer housing, the struts contact wall, the poka-yoke conduits, the housing position stopper and the section of the walls that prevent the housing from rotating.

Figure 12. is the perspective view of the area in contact with the housing and its struts, the contact area with the walls of the outer housing, and the areas holding the rotation rod in place.

Figure 13. is the sectional view of the area in contact with the housing and its struts, the area in contact with the walls of the outer housing, the region holding the rotation rod in place and the area where the syringe is mounted.

Figure 14. is the sectional perspective view of the detail of keeping the outer housing and the housing parts in place by contacting the struts. Figure 15. is the perspective view of the first actuating spring holder part together with the spring seating area.

Figure 16. is the sectional view of the spring seating area of the first actuating spring holder part and the region in contact with the syringe.

Figure 17. is the perspective view of the position locking part and the connection tabs to the outer housing and the rotation rod contact area details on it.

Figure 18. is the sectional view of the connection tabs rotation rod contact area of the position locking part to the outer housing and the details of the first actuating spring seating area.

Figure 19. is the assembled section view of the housing syringe, syringe needle, first actuating spring, first actuating spring holder, and position locking parts.

Figure 20. is the detailed perspective view of the part of the rotation rod that drives the syringe, the area contacting the housing, the area contacting the second actuating spring, the area contacting the upper cap, the area that adjusts the medicine injection dosage by contacting the mounting hole and position locking part.

Figure 21. is the detailed perspective view of the tabs connected to the outer housing, weight discharge section and rotation rod outward window on the upper cap and the part. Figure 22. is the detailed sectional view of the walls in contact with the rotation rod on the upper cap and the part and the area where the second actuating spring touches.

Figure 23. is the perspective view of contact of the rotation rod with the housing part and the housing wall in the standby state where the rotation rod, the housing and the upper cap parts are mounted and its locked state by contacting the wall of the upper cap piece.

Figure 24. is the perspective view of cutting off the contact of the rotation rod to the housing part and the housing wall in the standby state where the rotation rod, the housing and the upper cap parts are mounted and being released from the wall of the upper cap piece by cutting its contact and performing rotation and being driven from the second actuating spring. Figure 25. is the perspective view of the part on the actuating part that touches the struts and the wall, of the window allowing the syringe and medicine to be seen, the stopper bolt connection section, poka-yoke conduits, poka-yoke tracker sections.

Figure 26. is the sectional view of the window allowing the syringe and medicine to be seen on the actuating part, the stopper bolt connection section, the area in contact with the skin, the syringe cavity, the friction area details. Figure 27. is the view of the struts of the outer housing and the actuating part and the housing part are in the stand-by position in the ready-to-use position.

Figure 28. is the view of releasing of the housing part by tilting the struts by touching the struts contact walls with exposing the struts of the outer housing and the actuating part and the housing part, actuating part to a push.

Figure 29. is the view of the medicine injection position of the auto injector where the syringe needle is released.

Figure 30. In the medicine injection position of the auto injector’s position where the syringe needle is released, it is the view of the position of the rotation rod, housing, actuating part, medicine, syringe stopper, first actuating spring holder, boom holder, protection telescope inner boom and safety actuating spring, positioning pieces.

Figure 31. In the medicine injection position of the auto injector’s position where the syringe needle is released without showing the outer housing, it is the view of the position of the rotation rod, housing, actuating part, medicine, syringe stopper, first actuating spring holder, boom holder, protection telescope inner boom and safety actuating spring , protection telescope outer boom, position adjuster, second actuating spring, upper cap, position locking part, housing, first actuating spring, first actuating spring holder, actuating part, stopper bolt pieces.

Figure 32. is the perspective view of the area where the protection telescope outer boom contacts the boom holder it is on and the area in contact with the protection telescope inner boom.

Figure 33. is the sectional view of the area where the protection telescope outer boom contacts the boom holder it is on and the area in contact with the protection telescope inner boom.

Figure 34. is the perspective view of the area where the protection telescope outer boom contacts the boom holder it is on and the area in contact with the actuating part.

Figure 35. is the sectional view of the area where the protection telescope outer boom contacts the boom holder it is on and the area in contact with the actuating part.

Figure 36. is the ready-to-use assembled sectional view of the protection telescope inner boom, protection telescope outer boom, boom holder, outer housing, safety actuating spring, syringe and syringe needle attached to the syringe.

Figure 37. is the detail sectional view of the placement of the syringe cap to protect the syringe needle, the part of the lower cap that allows it to be separated from the syringe needle by contacting the syringe cap, assembled with lower cap and lower casing parts that protect these parts from the external environment, the part where it connects to the outer housing and the part that allows it to be opened manually.

Figure 38. is the perspective view of the positions of the opened state of the protection telescope inner boom and the protection telescope outer boom with the outer housing and the boom holder to hide the syringe needle after injection.

Figure 39. is the perspective view of the positions of the open version of the protection telescope inner boom, protection telescope outer boom driven by the safety actuating spring boom with the outer housing and the boom holder to hide the syringe needle after injection.

The parts in the figures are numbered one by one, and the equivalents of these numbers are given below.

1. Outer housing

1.1. Strut

1.2. Injection position stopper

1.3. Medicine window

1.4. Actuating part stop section

1.5. Actuating part stopper bolt assembly window

1.6. Position locking part tab insertion section

1.7. Upper cap tab insertion section

1.8. Strut actuating part contact Wall

1.9. Rotation prevention conduit

1.10. Lower cap assembly area

1.11. Actuating part Poka-Yoke conduit assembly section

2. Housing

2.1. The area where the housing is held by the struts

2.2. Syringe seating area

2.3. The area holding the rotation rod

2.4. Outer housing contact section

3. First actuating spring 4. First actuating spring holder

4.1. First actuating spring seating area

4.2. Syringe contact area

5. Position locking part

5.1. Outer housing connection tab

5.2. First actuating spring seating area

5.3. Restriction area

6. Upper cap

6.1. Tab where the upper cap attaches to the outer housing

6.2. Second actuating spring contact area

6.3. Rotation rod contact Wall

6.4. Weight reduction section

6.5. Rotation rod outward window

7. Second actuating spring

8. Rotation rod

8.1. The area that drives the syringe

8.2. Housing contact area

8.3. Actuating spring contact area

8.4. Upper cap contact area

8.5. Mounting hole

8.6. Restriction area

9. Actuating part

9.1. Contact section to struts

9.2. Syringe medicine window

9.3. Stopper bolt connecting section

9.4. Poka-Yoke conduit

9.5. Poka-Yoke tracker

9.6. Dermal contact area

9.7. Syringe cavity

9.8. Friction area

10. Actuating part stopper bolt

11. Protection telescope inner boom 11.1. The area in contact with the protection telescope outer boom

11.2. The section that functions as a fixed stop by making frictional contact with the actuating part

12. Protection telescope outer boom

12.1. The section in contact with the boom holder section

12.2. The section in contact with the protection telescope inner boom

13. Boom holder

14. Safety actuating spring

15. Lower cap

15.1. Syringe cap contact section

15.2. Outer housing contact section

15.3. Lower cap opening section

16. Position adjuster

17. Lower casing

18. Upper casing

19. Syringe

20. Syringe needle

21. Syringe cap

22. Medicine

23. Syringe stopper

24. Auto injector

The invention is an auto injector (24), characterized in that it comprises the following;

- at least one housing (2), mounted to hold a medicine syringe (19) with a needle (20),

- at least one actuating spring (3), which drives the housing (2) to allow it to insert into skin,

- at least one first actuating spring holder (4), which prevents the actuating spring (3) from coming into contact with the syringe (19) and acts as a compensation,

- at least one position locking part (5) that enables the housing (2) to be kept in a certain position within the device,

- at least one outer housing (1) enabling the housing (2) to be kept in a certain position within the device,

- at least one stmts (1.1), located in the outer housing in one piece (1) and allowing the housing (2) to be released,

- at least one rotation rod part (8) that allows the medicine (22) to be injected into the human body by applying pressure to the syringe stopper (23),

- at least one second actuating spring (7) that drives the rotation rod part (8),

- at least one upper cap (6) that meets the force of the second actuating spring (7) and is connected to the outer housing (1),

- at least one actuating part (9) that acts to release the housing (2) by applying pressure to the stmts (1.1) of the outer housing (1) by changing its position with dermal contact,

- at least one position adjuster (16) positioned between the outer housing (1) and the housing (2), which serves to adjust the amount of skin insertion separately for adults and children,

- at least one stoppage levers (1.2) located in the outer housing (1) in one piece and functioning to stop the syringe (19) after covering a certain distance,

- at least one lower cap part (15) that attaches to the needle protection cap (21) of the syringe (19) and ensures that the product is ready for use when opened by hand.

The auto injector (24) of the application functions to inject the medicine (22) into the human skin by triggering the system (Figure 18) with a syringe (19) with a pre-filled medicine (22), a syringe stopper (23) and parts of the syringe cap (21) that cut off the contact of the medicine (22) with the external environment, by dermal contact with the human body. Pre-prepared syringe (19), syringe cap (21), medicine (22) and Syringe stopper (23) are assembled into a housing (2). The housing (2) can only move in linear direction by contacting the detailed area (1.9) within the Outer housing (1) part to which many parts of the Auto Injector (24) are connected.

In order for the auto injector (24) included in an embodiment of the invention to contact the human skin and to insert the syringe (19) to the human skin by being driven by applying some force, there is the first actuating spring (3), which is stretched inside the auto injector. The first actuating spring (3) drives the syringe (19) over the part of the housing (2) to insert the human skin. The first actuating spring holder (4) part is used in order to prevent the contact of the syringe (19) and the first actuating spring (3), which is a piece made of metal material, and to prevent any assembly or operating error by guiding the first actuating spring (3). The first actuating spring (3) contacts the surfaces referenced with the seating area (4.1) in the first actuating spring holder (4) part. In the stretched position, the first actuating spring (3) contacts the position locking part (5) from the spring seating area (5.2). Since the first actuating spring (3) is required to push the housing (2) piece with the release of the housing (2), the position locking part (5) is fixed to the outer housing (1) from the position locking part tab insertion section (1.6 ) with the tabs on it (5.2).

The struts (1.1) included in an embodiment of the invention are also the element that enables the housing (2) part to be released. The actuating part (9) is the part that will start the injection process by contacting the human skin. The actuating part (9) can freely perform a minimal movement in the direction of injection in the outer housing (1). The section (9.1) that contacts the tension part on the actuating part (9) is in contact with the walls (1.8) on the struts (1.1) which are in the outer housing (1) in one piece. Figure 27 schematically shows the positions of the outer housing struts (1.1) and the actuating part (9) while the auto injector (24) is ready for use. During use, the movement of the actuating part by pressing it against the skin from its area (9.6) in contact with the skin and giving it 8-10 Newtons of force, is shown schematically in Figure 28.

The struts (1.1) in this embodiment of the invention have the ability to stretch since they are produced from a plastic material, and the struts are disconnected from the housing (2) when the walls (9.1) with a certain angle on the actuating part (9) try to bend the wall (1.8) on the struts. In this way, the housing (2) remains free. The actuating part (9) must be properly mounted to the outer housing (1) so that it can make proper contact with the outer housing struts (1.8). The poka-yoke conduits (1.11) detailed in Figure 2G are mounted at a single angle by means of the actuating part poke-yoke conduits (9.4).

The auto injector (24) included in this embodiment of the invention must be in its pre-use position indicated in Figure 1, and the medicine (22) it contains must be visible. In housing of deterioration of the medicine (22) transparency will be lost. Therefore, the mechanisms that allow the medicine (22) to be seen in the syringe (19), which is already made of clear glass, are described below. As shown in Figure 2, the actuating part (9) and the outer housing (1) prevent the medicine (22) from being seen from anywhere. For this reason, the syringe medicine window (9.2) shown in Figure 25 has been opened on the actuating part (9). On the outer housing (1), which is shown in Figure 9 and Figure 10, sections of the outer housing medicine window (1.3), allowing the medicine (22) to be seen from the outside, have been opened. The actuating part (9), whose perspective view is given in Figure 25, is mounted on the outer housing (1) part at a single angle in order to prevent incorrect assembly. This feature is provided by the asymmetrical Poka-Yoke conduits (9.4). In the part shown in Figure 25, the Poka-yoke tracker (9.5) part is marked on the part for the operator or machine to position the actuating part (9) correctly in order to facilitate the assembly.

The actuating part (9) in this embodiment of the invention, should not come out of the auto injector (24) again after it is mounted in the outer housing (1). For this reason, the stopper bolt connecting section (9.3) has been added on the actuating part (9). Detail (9.3) on the actuating part (9) made of plastic material is grooved with Metric two screw thread. After the actuating part (9) is placed in the outer housing (1), actuating part stopper bolt (10) with standard M2 screw thread is mounted on the part to this section (9.3) from the actuating part stopper bolt assembly section (1.5) on the outer housing (1) (Figure 11). Figure 31 shows the way of connecting the actuating part stopper bolt (10) on the actuating part (9). The actuating part stopper bolt (10) mounted on the actuating part (9) makes contact with the actuating part stop section (1.4) which is in the outer housing in one piece (1) and the possibility of coming out of the outer housing (1) is prevented. The actuating part (9) is hidden inside the assembled auto injector (24) in standby state. In order for the actuating part (9) to interact with the human body, the lower cap (15) mounted on the outer housing (1) of the auto injector (24) must be manually removed.

The lower cap (15) in this embodiment of the invention, is removed by hand from the area (15.3) detailed in Figure 37. The lower cap (15) is mounted to the outer housing (1) from a part (15.2) showing friction and is removed with a minimal force. The lower cap (15) is fixed to the outer housing (1) from the area detailed in Figure 7 (1.10). The arms (15.1), which are in a single piece to the lower cap (15) and surrounding the Syringe cap during assembly, remove the Syringe cap (21) during manual removal of the lower cap (15) and the auto injector (24) becomes ready for use. After manual removal of the lower cap (15), the auto injector (24) is ready for use as of the position given in Figure 36 in detail sectional view. In the injection process, the needle is positioned so that it is not visible through the outer housing (1) during use, since it would be uncomfortable for the user to see the needle. Figure 4 provides the perspective view of the auto injector (24) which is ready to injection. The actuating part (9) will move the struts (1.1) and release the housing (2) if it comes into contact with the skin during the injection process. With this process, the first actuating spring (3) under tension will activate the first actuating spring holder part (4) attached to itself in order to reach its free position. Since the first actuating spring holder (4) is attached to the syringe (19), the syringe (19) part will also move in the same direction. With the movement of the syringe (19), the part of the housing (2) to which the syringe (19) is attached will also move. With the movement of the housing (2) inside the auto injector (24), the contact of the walls (2.3) holding the one-piece rotation rod in place on the housing (2) will be cut off with the rotation rod (8).

As shown in Figure 23 in this embodiment of the invention, while the auto injector (24) is in the assembled state in the standby position, the housing (2), the upper cap (6) and the rotation rod (8) come into contact with each other and remain stuck in the relevant positions. The rotation rod (8) receives force from the second actuating spring (7), which is under tension and therefore tends to move in the direction of injection. In the feature shown in the closed position in Figure 23, it applies pressure to the housing (2) from the walls (2.3) on the housing with a wall (8.2) of the wings on the rotation rod (8). While the auto injector (24) is in standby position, the thrust force of the second actuating spring (7), which tries to push the housing (1) through the rotation rod (8), is held by the struts (1.1) attached to the outer housing (1). The thrust force coming from the second actuating spring (7) forces it to rotate due to the structure of the inclined wall (8.2) of the rotation rod. This rotation movement is prevented by the flat walls (8.4) on the wings of the rotation rod (8) and the rotation rod contact walls (6.3) found from the upper cap (6) part. As of the related force, the upper cap (6) part is also forced to perform rotation and this movement is blocked by the tabs (6.1) on the upper cap (6) that provide a connection to the outer housing (1) (Figure 21). The rotation rod (8) moves with the housing (2) by actuating and driving the above-mentioned actuating mechanisms of the housing (2) in this embodiment of the invention. After this move, as shown in Figure 24, since there is no part preventing the rotation of the rotation rod (8), the rotation rod (8) can move easily in the auto injector (24) by taking force from the second actuating spring (7). Figure 29 shows the triggering of the auto injector (24) after dermal contact. After triggering, the syringe needle (20) is exposed and inserts into the human skin. In the process detailed in Figure 30, with the rotation rod (8) getting rid of the area where it is located shown in Figure 24, and being driven from the second actuating spring (7), the rotation rod (8) applies pressure on the syringe stopper (23). As shown in Figure 30 in detail, the syringe (19) and the syringe needle (20) attached to the syringe can make a limited movement after triggering. This subdermal needle insertion, which is 23 mm for adults and 14 mm for children, has been developed to prevent the syringe needle (20) from sticking into the human bone.

The housing (2) in this embodiment of the invention, is stopped by a position stopper (1.2) positioned in one piece on the outer housing. In this way, an unwanted amount of needle insertion into human skin is avoided. This mechanism allows the syringe needle (20) to insert 23mm into human skin. If the positioning part (16) and the auto injector (24) shown in Figure 30 are to be used for children, they are in the device. The positioning part (16) is placed freely inside the outer housing (1), between the actuating part (9) and the housing (2). The task of the positioning part (16) is to allow the syringe needle to insert of 14 mm by getting stuck between the actuating part (9) and the housing (2). In this way, the possibility of excessive penetration of the syringe needle (20) into the skin in children is prevented. In Figure 31, the triggered state of the auto injector (24) and the perspective view of the inner mechanisms by hiding the outer housing (1) are given. As shown in the figure, the rotation rod (8) has moved freely. The details of the upper cap (6) part are shown in Figure 21. The second actuating spring (7) is stuck between the upper cap (6) part and the rotation rod (8). Due to this tension, an additional force or limiter is needed to keep the rotation rod (8) in place in order for the upper cap (6), rotation rod (8) and second actuating spring (7) parts to be mounted on the outer housing (1) of the auto injector (24). Access to the rotation rod (8) is provided through the rotational rod outward window (6.5) located on the upper cap (6) and shown in Figure 21. The mounting hole (8.5) on the rotation rod (8) shown in Figure 20 in this embodiment of the invention, is fixed with any machine or assembly tool, while the rotation rod (8) is fixed on the upper cap (6). The lower mounting of the upper cap (6), the second actuating spring (7) and the rotation rod (8) is made with the tabs (6.1) on the upper cap (6) and the windows (1.7) of the outer housing (1) in Figure 5. After these mechanisms are mounted on the outer housing (1), they are protected by the upper casing (18) shown in Figure 2, in order to avoid any external drive in the standby position. As illustrated in Figure 37, although the Syringe needle (20) is isolated from the outside environment by the syringe cap (21), the lower casing part (17), which interrupts contact of the syringe needle (20) with the external environment, is placed on the lower cap (15) to avoid any external contact, drive or pollution. As shown in Figure 2, when the auto injector (24) is in the standby position, the actuating part (9) is in contact with the protection telescope inner boom (11). The safety actuating spring (14) is kept in the tension position within the auto injector (24), and it applies thrust on the protection telescope inner boom (11). The applied thrust forces the protection telescope inner boom (11) to open. This movement is met by the friction area (9.8) located on the actuating part (9) detailed in Figure 26. With this thrust, the actuating part (9) wants to open out. However, as described above, this movement is blocked because the actuating part stopper bolt (10) attached to the actuating part (9) touches the section (1.5) on the outer housing (1).

As detailed in Figure 39 in this embodiment of the invention, the actuating part (9) made contact with the human skin and made progress in terms of the thrust force and changed its position. After this movement, the protection telescope inner boom (11) is freed from actuating part (9) to which it is attached by friction and tends to open with the force it receives from the safety actuating spring (14). With the lifting of the auto injector (24) from the skin, the protection telescope inner boom (11) begins the opening movement. As detailed in Figure 34 and Figure 35, the protection telescope inner boom (11) ends its movement within the protection telescope outer boom with the contact area (11.1) it has on it. This area (11.1) ensures that the force is transferred to the protection telescope outer boom (12). Thus, the protection telescope outer boom will tend to open. The protection telescope outer boom (12) detailed in Figure 32 and Figure 33, makes contact with the contact area (12.1) it has on it and the boom holder (13) part and the forward movement is over. The boom holder (13) part is tightly mounted to the outer housing (1) part. The protection telescope inner boom (11), the protection telescope outer boom (12), detailed views of which are given in Figure 38 and Figure 39, were opened by the force they received from the safety actuating spring (14) and concealed the syringe needle (20). After this sudden drive, the protection telescope inner boom (11) stays fixed by rubbing tightly against the protection telescope outer boom (12) with another friction area (11.1) it has over it. The protection telescope outer boom (12) stays fixed by rubbing tightly against the boom holder (13) part with the friction area (12.1) it has over it. After this drive is realized, the syringe needle (20) is preserved.

Claims

1. The invention is an auto injector (24), characterized in that; it comprises;

- at least one housing (2), mounted to hold a medicine syringe (19) with a needle

(20),

- at least one struts (1.1), located in the outer housing (1) in one piece and allowing the housing (2) to be released,

- at least one actuating part (9) that acts to release the housing (2) by applying pressure to the struts (1.1) of the outer housing (1) by changing its position with dermal contact,

- at least one positioning part (16) positioned between the outer housing (1) and the housing (2), which serves to adjust the amount of skin insertion separately for adults and children,

- at least one stoppage levers (1.2) located in the outer housing (1) as one piece and functioning to stop the syringe (19) after covering a certain distance,

2. An auto injector (24) as in Claim 1, characterized in that; the section (9.1) located at an angle on the actuating part (9) it contains, and contacts the struts (1.1) of the outer housing (1), stretches the struts (1.1) located on the outer housing (1) by moving in a linear direction inside the device (24) with dermal contact (9.6) of the actuating part

(9).

3. An auto injector (24) as in Claim 1, characterized in that; stretching of the struts (1.1) in the outer housing (1) by being driven from the actuating part (9) and ending of their contact with the housing (2) part, release the housing (2) part.

4. An auto injector (24) as in Claim 1, characterized in that; the rotation rod (8) part it contains waits in the usage position within the device by contacting the walls (2.3) of the housing (2) part.

5. An auto injector (24) as in Claim 1, characterized in that; the walls (6.3) of the upper cap (6) part it contains, prevent the rotation rod (8) from moving and rotating.

6. An auto injector (24) as in Claim 1, characterized in that; when the housing (2) is released in the auto-injector (24), it moves by taking force from the second actuating spring (7) and exerts pressure on the syringe stopper (23) allowing the medicine (22) to be injected into the skin.

7. An auto injector (24) as in Claim 1, characterized in that; the protection telescope inner boom (11) part it contains, is held in place with the friction area (9.8) of the actuating part (9) and with the principle of friction while the device (24) is in the rest position.

8. An auto injector (24) as in Claim 1, characterized in that; the protection telescope outer boom (12) it contains, is kept in place in contact with the friction walls (11.1) of the protection telescope inner boom (11) when the device (24) is in the rest position.

9. A protection telescope outer boom (12) as in Claim 1 and Clam 8, characterized in that; it is opened by the protection telescope inner boom (11) by contact over the contact area (12.2).

10. A strut (1.1) as in Claim 2, characterized in that; there can be 1 or 9 pieces on the outer housing (1).

11. A strut (1.1) as in Claim 2, characterized in that; it makes contact with the actuating part (9) in an angle range of 5° to 60° with respect to the direction of use.

12. An actuating part (9) as in Claim 2, characterized in that; it can be driven in a force range of 3 to 20 Newtons by dermal contact.

13. An auto injector (24) as in Claim 1, characterized in that; the positioning (16) part it contains, gets stuck between the actuating part (9) and the housing (2), allowing the syringe needle (21) to insert into the human body in the range of 25 to 12 mm.

14. A positioning part (16) as in Claim 13, characterized in that; it is 1 to 12 mm in length, allowing the insertion range to be adjustable.