CN217286771U - Injection device with fixed dose self-destruction function - Google Patents

Abstract

The utility model relates to an injection device with fixed dose self-destruction function belongs to aseptic medical instrument field. Comprises a core bar, an outer sleeve, a piston, an injection needle and an elastic ferrule; the outer sleeve comprises a clamping self-locking section and a liquid cavity section, wherein a self-destruction opening clamping groove is formed in one end, close to the liquid cavity section, of the clamping self-locking section, and a quantitative opening clamping groove is formed in the other end of the clamping self-locking section; the core rod comprises a clamping sleeve sliding section and a clamping sleeve limiting section; the elastic clamping sleeve is sleeved on the core rod; the elastic clamping sleeve comprises a clamping sleeve body and elastic clamping jaws, the clamping sleeve body is sleeved on the core rod, the elastic clamping jaws are outwards opened from the side faces of the clamping sleeve body and form a certain angle with the clamping sleeve body, and the elastic clamping jaws are arranged in a manner of being matched with the self-destruction open clamping groove and the quantitative open clamping groove. The utility model discloses can the ration imbibition, accomplish the self-destruction after the injection, self-destruction state is stable, safe and reliable, and the suction in-process can not increase because of the extra gas that design factor caused, has reduced medical personnel's work load, and is simple to use, convenient and reliable.

Description

Injection device with fixed dose self-destruction function

Technical Field

The utility model relates to an injection device with fixed dose self-destruction function belongs to aseptic medical instrument field.

Background

At present, a common syringe is widely used at home, and when the common syringe sucks liquid medicine, the scale is generally adopted, so that the medical care personnel can visually confirm the operation mode of the suction amount. At present, common quantitative self-destruction syringes have different structural styles, and when a plurality of manufacturers relate to products, the core bar is not allowed to be pushed to the bottom of the syringe barrel body in the initial state of the products, and the core bar is clamped to realize the self-destruction function only after the core bar is pushed to the bottom for injection.

The prior art has the following technical defects:

1. the dosage of the liquid medicine is uncertain, and the potential safety hazard of medicine application exists. The condition that the sucked liquid medicine exceeds the preset dosage is easy to occur in the using process of a common syringe, on one hand, waste is caused, and on the other hand, the harm is also brought to a patient due to excessive administration.

2. The existing common self-destruction syringes have complex structures and certain limitations on reliability. The utility model patent CN2770678 discloses an anchor piston syringe needle retraction type safety syringe, has syringe needle seat, syringe needle, push rod, overcoat, the syringe needle setting is on syringe needle seat top, syringe needle and syringe needle seat fixed connection, the push rod setting is in the overcoat, the push rod front end is provided with the arris recess, the overcoat head is equipped with the barrel neck, syringe needle seat sets up in the barrel neck, syringe needle seat outer lane is provided with protruding annular driving fit circle, syringe needle seat is connected through protruding annular driving fit circle driving fit with the barrel neck, syringe needle seat lower part is provided with the anchor head. The utility model discloses a syringe needle seat and cylinder neck pass through protruding annular driving fit circle driving fit and are connected, and syringe needle seat is only fixed with the frictional force of cylinder neck through protruding annular driving fit circle with the cylinder neck, if frictional force is too little then syringe needle seat and cylinder neck easily take place to remove, and increase frictional force then with the difficult syringe needle seat of pulling of anchor form head or the anchor form head breaks and can't realize the syringe needle problem that contracts.

3. The utility model patent CN202777326U discloses a pull-back formula self-destruction syringe, including the injection tube, the needle file, the needle cover, the needle tubing, the needle spare, core bar and plug, it is connected with the front end of injection tube to change the needle file, the needle cover is on the needle file, the rear end of needle tubing is fixed in with the needle spare, the front end holds in the needle cover, this needle spare is installed in the needle file, the rear end of needle spare extends to in the injection tube, and the needle spare is provided with the inclined plane, the injection tube is provided with the inclined plane that is used for cooperating the needle spare in order to prevent the cooperation inclined plane that the needle spare moved back, the core bar is inserted in the injection tube by the rear end of injection tube, the front end setting of core bar and the breach that is used for holding the needle spare rear end, the opening part of breach is provided with the screens that is used for the inclined plane of extrusion needle point, the plug cover is on the front end of core bar. The utility model discloses a patent initial state plug is in the upper end on needle spare inclined plane, and the plug can not push away the bottom, leads to the bubble too much during the suction liquid medicine, need discharge the bubble in the overcoat. Not only increases the workload of medical staff and the working strength of the medical staff, but also reduces the working efficiency and increases the infection probability.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the utility model provides an injection apparatus with fixed dose self-destruction function, can the ration imbibition, accomplish the self-destruction after the injection, the self-destruction state is stable, safe and reliable, the suction in-process can not increase because of the extra gas that the design factor caused, also can be according to clinical needs free pull down core rod suction liquid simultaneously, has reduced medical personnel work load, simple to use, convenient and reliable.

The injection device with the fixed dose self-destruction function of the utility model comprises a core bar, an outer sleeve, a piston, an injection needle and an elastic card sleeve;

the outer sleeve comprises a clamping self-locking section and a liquid cavity section, wherein a self-destruction opening clamping groove is formed in one end, close to the liquid cavity section, of the clamping self-locking section, and a quantitative opening clamping groove is formed in the other end of the clamping self-locking section;

the core rod comprises a clamping sleeve sliding section and a clamping sleeve limiting section;

the elastic clamping sleeve is sleeved on the core rod; the elastic clamping sleeve comprises a clamping sleeve body and elastic clamping jaws, the clamping sleeve body is sleeved on the core rod, the elastic clamping jaws are outwards opened from the side surface of the clamping sleeve body and form a certain angle with the clamping sleeve body, and the elastic clamping jaws are arranged in a manner of being matched with the self-destruction opening clamping groove and the quantitative opening clamping groove;

the quantitative opening clamping groove, the elastic clamping jaw, the clamping sleeve sliding section and the clamping sleeve limiting section are matched for quantitatively absorbing liquid;

the self-destruction opening clamping groove, the elastic clamping jaw, the clamping sleeve sliding section and the clamping sleeve limiting section are matched for limiting self-destruction;

in an initial state, the piston is positioned at the bottom of the liquid cavity section, the elastic clamping sleeve is arranged on the clamping sleeve sliding way, and the elastic clamping claws are clamped in the quantitative opening clamping grooves.

Working process or working principle:

the front end of the core rod is provided with a piston which is usually a rubber plug, and the front end of the outer sleeve is connected and communicated with the injection needle.

The injection device with the fixed dose self-destruction function is in an initial state, and the elastic clamping sleeve is clamped in the quantitative opening clamping groove.

Liquid suction: pulling the core rod, wherein the push plate moves outwards along with the core rod until the elastic clamping sleeve is matched with and clamped with the limiting section of the core rod clamping sleeve for limiting, the elastic clamping sleeve is clamped into the quantitative opening clamping groove, the core rod cannot be pulled any more, the suction dosage reaches the preset dosage, and the liquid suction is finished;

and (3) injection: the core rod is pushed forwards, the clamping sleeve limiting section and the elastic clamping sleeve move forwards, injection liquid is injected through the injection needle until the elastic clamping sleeve reaches the self-destruction opening clamping groove, the elastic clamping jaws stretch out of the self-destruction opening clamping groove, the core rod and the piston completely push against the front end of the outer sleeve, and injection is completed.

Self-destruction: at the moment, the elastic clamping claws of the elastic clamping sleeves are clamped with the self-destruction open clamping grooves, the core rod cannot retreat and can not be used again, and self-destruction is realized. The self-destruction function is stable, safe and reliable.

Liquid pumping: during the suction, the piston is closely attached to the bottom of the liquid cavity end of the outer sleeve, extra gas caused by design factors is not added in the suction process, the core rod can be freely drawn and pulled to suck liquid according to clinical needs, and the liquid suction device is simple and convenient to use.

Preferably, a guide limiting groove is formed in the inner side face of the clamping self-locking section corresponding to the elastic clamping jaw and used for guiding and limiting the linear motion of the elastic clamping jaw.

Preferably, the outer side surface of the elastic clamping jaw is provided with a guide inclined surface, the elastic clamping jaw is matched with the guide limiting groove, and the guide inclined surface is used for guiding the elastic clamping jaw into the guide limiting groove.

Preferably, the elastic claws are provided with a pair and are symmetrically arranged; a pair of guide limiting grooves are correspondingly arranged and are symmetrically arranged; a pair of quantitative opening clamping grooves are correspondingly arranged and are symmetrically arranged; a pair of self-destruction open slots are correspondingly arranged and are symmetrically arranged.

Preferably, the starting end of the self-destruction open clamping groove is provided with a first clamping surface, the starting end of the quantitative open clamping groove is provided with a second clamping surface, and the first clamping surface and the second clamping surface are both arranged in a manner of being matched with the elastic clamping claws.

Preferably, the cutting ferrule body is provided with an assembly groove, and the assembly groove is in clamping fit with the cutting ferrule sliding section of the core rod.

Preferably, the assembly groove is a T-shaped assembly groove, the T-shaped assembly groove is provided with a pair of clamping tables, and the elastic clamping sleeve clamps the core rod through the clamping tables.

Preferably, the ends of the resilient jaws are pointed.

Preferably, two limiting tables are correspondingly arranged at two ends of the cutting sleeve limiting section, each limiting table comprises an upper limiting table and a lower limiting table, the upper limiting table is arranged close to the cutting sleeve sliding section, and an open slot is formed in the middle of the upper limiting table along the axial direction.

Preferably, the elastic cutting ferrule is integrally injection molded.

Preferably, the length of the cutting sleeve limiting section is greater than the length of the elastic cutting sleeve.

Preferably, a push plate is arranged at one end, close to the opening of the outer sleeve, of the cutting sleeve sliding section, the push plate is an annular push plate, and the diameter of the push plate is larger than the section of the cutting sleeve body.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses a set up elasticity buckle and ration opening draw-in groove and self-destruction opening draw-in groove cooperation, realize ration imbibition and spacing self-destruction, ration suction liquid medicine accomplishes the self-destruction after the injection, self-destruction state is stable, safe and reliable, the suction in-process does not increase the extra gas that causes because of the design factor, also can be according to clinical needs free pull core bar suction liquid simultaneously, has reduced medical personnel's work load, has reduced the infection, uses safelyr.

2. Through setting up the assembly groove, ensure that elastic ferrule is axial displacement along the core bar, can be more firm the assembly on the core bar, cutting ferrule and core bar link to be a whole, self-destruction function is safer, reliable.

3. The elastic clamping sleeve is matched with the elastic clamping sleeve by arranging the upper limiting table, the lower limiting table and the open slot, so that the elastic clamping sleeve is clamped with the core rod; and then the elastic clamping sleeve is matched with the quantitative opening clamping groove and the self-destruction opening clamping groove, so that the quantitative liquid suction is completed on the limit of the core rod, the self-destruction is completed on the limit of the core rod after the injection, the self-destruction function is stable, and the safety and the reliability are realized.

Drawings

FIG. 1: the structure diagram of the initial state of the embodiment of the utility model,

FIG. 2: the structure of the self-destruction state after the injection of the utility model is completed is schematically shown in one embodiment,

FIG. 3: the structure of the outer sleeve is schematically shown,

FIG. 4 is a schematic view of: the schematic sectional structure of A-A in FIG. 3,

FIG. 5: the cross-sectional structure of B-B in FIG. 4 is schematically shown,

FIG. 6: the structure of the core rod is schematically shown,

FIG. 7 is a schematic view of: the enlarged structure at C in figure 6 is schematically shown,

FIG. 8: the structure of the elastic card sleeve is shown schematically,

FIG. 9: fig. 8 is a top view.

In the figure: 1. a core rod 2, an outer sleeve 3, an elastic ferrule 4, an injection needle 5 and a piston;

1.1, a push plate 1.2, a ferrule sliding section 1.3, an upper limiting table 1.4, a ferrule limiting section 1.5 and a lower limiting table; 1.6, an open slot 1.7 and a guide limit inclined plane;

2.1, a quantitative opening clamping groove 2.2, a clamping self-locking section 2.3, a self-destruction opening clamping groove 2.4, a liquid cavity section 2.5, a curled edge 2.6 and a guide limiting groove;

2.3.1, 2.1.1 the first clamping surface and the second clamping surface;

3.1, a first elastic clamping jaw 3.2, an assembly groove 3.3, a second elastic clamping jaw 3.4, a cutting sleeve body 3.5 and a clamping table;

3.11, a first guide inclined plane 3.31 and a second guide inclined plane.

Detailed Description

Example 1

As shown in fig. 1 to 9, the injection device with a fixed dose self-destruction function of the present invention comprises a core bar 1, an outer sleeve 2, a piston 5, an injection needle 4 and an elastic ferrule 3;

the outer sleeve 2 comprises a clamping self-locking section 2.2 and a liquid cavity section 2.4, wherein a self-destruction open clamping groove 2.3 is formed in one end, close to the liquid cavity section 2.4, of the clamping self-locking section 2.2, and a quantitative open clamping groove 2.1 is formed in the other end of the clamping self-locking section;

the core rod 1 comprises a cutting sleeve sliding section 1.2 and a cutting sleeve limiting section 1.4;

the elastic clamping sleeve 3 is sleeved on the core rod 1; the elastic clamping sleeve 3 comprises a clamping sleeve body 3.4 and elastic clamping jaws, the clamping sleeve body 3.4 is sleeved on the core rod 1, the elastic clamping jaws are outwards opened from the side surface of the clamping sleeve body 3.4 and form a certain angle with the clamping sleeve body 3.4, and the elastic clamping jaws are arranged in a manner of being matched with the self-destruction open clamping groove 2.3 and the quantitative open clamping groove 2.1; the tail ends of the elastic claws are in a sharp-angle shape. The quantitative opening clamping groove 2.1, the elastic clamping jaw, the clamping sleeve sliding section 1.2 and the clamping sleeve limiting section 1.4 are matched for quantitatively sucking liquid;

the self-destruction opening clamping groove 2.3, the elastic clamping jaw, the clamping sleeve sliding section 1.2 and the clamping sleeve limiting section 1.4 are matched for limiting self-destruction;

in an initial state, the piston 5 is positioned at the bottom of the liquid cavity section 2.4, the elastic clamping sleeve 3 is arranged on the clamping sleeve sliding channel 1.2, and the elastic clamping jaws are clamped in the quantitative opening clamping groove 2.1.

That is to say, initial state does not have the air in the liquid chamber section of overcoat, and the extra gas that causes because of design factor is not increased to the suction in-process, also can freely pull the core bar according to clinical needs suction liquid simultaneously, has reduced medical personnel work load, has reduced medical personnel working strength, has improved work efficiency, has reduced the infection probability. The end of the liquid chamber section 2.4 close to the injection needle 4 is a bottom.

Corresponding to the elastic clamping jaw, the inner side surface of the clamping self-locking section 2.2 is provided with a guide limiting groove 2.6 for guiding and limiting the elastic clamping jaw. The guide limiting groove 2.6 can be designed into a linear shape, and the guide limiting groove can guide the elastic clamping jaw to limit the linear motion.

The elastic clamping jaws are provided with a pair of elastic clamping jaws which are symmetrically arranged; the elastic clamping jaw can comprise a first elastic clamping jaw 3.1 and a second elastic clamping jaw 3.3; a pair of guide limiting grooves 2.6 are correspondingly arranged and are symmetrically arranged; a pair of quantitative opening clamping grooves 2.1 are correspondingly arranged and are symmetrically arranged; a pair of self-destruction open slots 2.3 are correspondingly arranged and are symmetrically arranged.

As shown in fig. 7, the outer side surface of the elastic claw is provided with a guide inclined surface, the elastic claw is arranged in cooperation with the guide limit groove 2.6, and the guide inclined surface is used for guiding the elastic claw into the guide limit groove 2.6. The outer side surface of the elastic claw is provided with a first guide inclined surface 3.11, and the outer side surface of the elastic claw is provided with a second guide inclined surface 3.31.

The starting end of the self-destruction open clamping groove 2.3 is provided with a first clamping face 2.3.1, the starting end of the quantitative open clamping groove 2.1 is provided with a second clamping face 2.1.2, and the first clamping face 2.3.1 and the second clamping face 2.1.1 are both arranged in a manner of being matched with the elastic clamping jaw.

The cutting ferrule body 3.4 is provided with an assembly groove 3.2, and the assembly groove 3.2 is matched with the cutting ferrule sliding section 1.2 of the core rod 1 in a clamping manner.

The assembly groove 3.2 is a T-shaped assembly groove, the T-shaped assembly groove is provided with a pair of clamping platforms 3.5, and the elastic clamping sleeve 3 clamps the core rod 1 through the clamping platforms 3.5. The assembly groove limits the elastic clamping sleeve to be clamped on the core rod more firmly, and the pre-charging amount is limited and the self-destruction is stable and reliable.

Two limiting tables are correspondingly arranged at two ends of the clamping sleeve limiting section 1.4, the two limiting tables comprise an upper limiting table 1.3 and a lower limiting table 1.5, the upper limiting table 1.3 is arranged close to the clamping sleeve sliding section 1.2, and the middle part of the upper limiting table 1.3 is provided with an open slot 1.6 along the axial direction. The outer side of the upper limit table is provided with a guide limit inclined plane 1.7. The outer side of the upper limit table refers to the side of the upper limit table far away from the lower limit table.

The elastic clamping sleeve 3 is integrally formed by injection molding.

The length of the clamping sleeve limiting section 1.4 is greater than that of the elastic clamping sleeve 3. The elastic clamping sleeve is ensured to be firmly and reliably clamped with the upper limiting table 1.3 and the lower limiting table 1.5.

One end of the cutting sleeve sliding section, which is close to the opening of the outer sleeve, is provided with a push plate 1.1, the push plate 1.1 is an annular push plate, and the diameter of the push plate 1.1 is larger than the section of the cutting sleeve body 3.4. When the push pedal mainly used product assembly, can promote the cutting ferrule body and follow the spacing groove of direction and get into overcoat ration opening draw-in groove.

The clamping self-locking section and the clamping sleeve sliding section are mutually matched and clamped to finish the pre-charging dosage, and the self-destruction is limited after the injection is finished.

The opening end of the outer sleeve is provided with a curled edge 2.5 outwards.

The utility model discloses in to the description of the direction and the relative position relation of structure, about all around description about, do not constitute right the utility model discloses a restriction only is the description convenient.

Working process or working principle:

the front end of the core rod is provided with a piston 5 which is usually made of rubber, and the front end of the outer sleeve is connected and communicated with the injection needle 4.

In the injection device with the fixed dose self-destruction function, in an initial state, the elastic clamping sleeve is clamped in the quantitative opening clamping groove and cannot move back and forth; in the injection process, the elastic clamping sleeve makes directional movement along the guide limiting groove.

The utility model is characterized in that the elastic jack catch of the elastic card sleeve is positioned in the quantitative open slot in the initial state, and the quantitative open slot is set according to the pre-charging dosage; after the injection is finished, the elastic clamping claws of the elastic clamping sleeves are clamped into the self-destruction open clamping grooves, the core rod is locked and limited, the injector cannot be used again, and the injector reaches a self-destruction state. The self-destruction function is stable, safe and reliable; extra gas caused by design factors is not added in the suction process, and meanwhile, the core rod can be freely pulled to suck liquid according to clinical needs, so that the workload of medical workers is reduced, and the use is simple and convenient.

Liquid suction: the core rod is pulled, the push plate moves outwards along with the core rod until the elastic clamping sleeve is positioned between the upper limiting table and the lower limiting table, and the core rod can not move any more, namely the pre-charging dosage is reached.

And (3) injection: promote the core bar forward, it drives the elastic clamping sleeve and breaks away from quantitative opening draw-in groove to go up the spacing platform, elastic clamping sleeve moves along the direction spacing groove, elastic clamping sleeve's elasticity jack catch's direction inclined plane is along quantitative opening draw-in groove upper end rebound, the direction inclined plane plays the gliding effect of direction, the direction inclined plane can make the elasticity jack catch get into the direction spacing groove more easily, the injection liquid passes through the syringe needle injection, until the elasticity jack catch reachs self-destruction opening draw-in groove, the direction inclined plane enables the elasticity jack catch to get into self-destruction opening draw-in groove smoothly, the elasticity jack catch stretches out self-destruction opening draw-in groove, the elasticity jack catch is spacing with self-destruction opening draw-in groove cooperation block, core bar and piston have pushed up the overcoat front end completely, the injection is accomplished.

Self-destruction: at the moment, the elastic clamping claws of the elastic clamping sleeves are clamped with the self-destruction open clamping grooves, the core rod cannot retreat and can not be used again, and self-destruction is realized.

Claims (10)

1. An injection device with a fixed dose self-destruction function is characterized by comprising a core bar (1), an outer sleeve (2), a piston (5), an injection needle (4) and an elastic cutting sleeve (3);

the outer sleeve (2) comprises a clamping self-locking section (2.2) and a liquid cavity section (2.4), wherein a self-destruction open clamping groove (2.3) is formed in one end, close to the liquid cavity section (2.4), of the clamping self-locking section (2.2), and a quantitative open clamping groove (2.1) is formed in the other end of the clamping self-locking section;

the core rod (1) comprises a cutting sleeve sliding section (1.2) and a cutting sleeve limiting section (1.4);

the elastic clamping sleeve (3) is sleeved on the core rod (1); the elastic clamping sleeve (3) comprises a clamping sleeve body (3.4) and elastic clamping jaws, the clamping sleeve body (3.4) is sleeved on the core rod (1), the elastic clamping jaws are outwards opened from the side surface of the clamping sleeve body (3.4) and form a certain angle with the clamping sleeve body (3.4), and the elastic clamping jaws are arranged in a manner of adapting to the self-destruction opening clamping groove (2.3) and the quantitative opening clamping groove (2.1);

the quantitative opening clamping groove (2.1), the elastic clamping jaw, the clamping sleeve sliding section (1.2) and the clamping sleeve limiting section (1.4) are matched for quantitative liquid suction;

the self-destruction opening clamping groove (2.3), the elastic clamping jaw, the clamping sleeve sliding section (1.2) and the clamping sleeve limiting section (1.4) are matched for limiting self-destruction;

in an initial state, the piston (5) is positioned at the bottom of the liquid cavity section (2.4), the elastic clamping sleeve (3) is arranged on the clamping sleeve sliding channel (1.2), and the elastic clamping jaws are clamped in the quantitative opening clamping groove (2.1).

2. The injection device with the self-destruction function of the fixed dose as claimed in claim 1, wherein the inner side surface of the snap-fit self-locking section (2.2) corresponding to the elastic claw is provided with a guide limiting groove (2.6) for guiding and limiting the elastic claw.

3. The injection device with self-destruction function for fixed doses according to claim 2, characterized in that the outer lateral surface of the resilient catch is provided with a guide ramp, the resilient catch is arranged in cooperation with the guide limit groove (2.6), and the guide ramp is used to guide the resilient catch into the guide limit groove (2.6).

4. An injection device with self-destruction function for fixed doses according to claim 2, characterized in that the resilient jaws are provided with a pair, symmetrically arranged; a pair of guide limiting grooves (2.6) are correspondingly arranged and are symmetrically arranged; a pair of quantitative opening clamping grooves (2.1) are correspondingly arranged and are symmetrically arranged; a pair of self-destruction open slots (2.3) are correspondingly arranged and are symmetrically arranged.

5. The injection device with self-destruction function of fixed dose according to claim 1, wherein the starting end of the self-destruction open slot (2.3) is provided with a first engaging surface (2.3.1), the starting end of the quantitative open slot (2.1) is provided with a second engaging surface (2.1.1), and the first engaging surface (2.3.1) and the second engaging surface (2.1.1) are both adapted to the elastic claw.

6. Injection device with fixed dose self-destruct function according to claim 1, characterized in that the ferrule body (3.4) is provided with an assembly groove (3.2), the assembly groove (3.2) snap-fitting with the ferrule gliding section (1.2) of the core rod (1).

7. The injection device with the fixed dose self-destruction function according to claim 6, wherein the assembly groove (3.2) is a T-shaped assembly groove, the T-shaped assembly groove is provided with a pair of clamping platforms (3.5), and the elastic clamping sleeve (3) clamps the core rod (1) through the clamping platforms (3.5).

8. The injection device with fixed dose self-destruct function of claim 1, wherein the ends of the resilient jaws are pointed.

9. The injection device with the fixed-dose self-destruction function according to claim 1, wherein two limiting tables are correspondingly arranged at two ends of the ferrule limiting section (1.4), the two limiting tables comprise an upper limiting table (1.3) and a lower limiting table (1.5), the upper limiting table (1.3) is arranged close to the ferrule sliding section (1.2), and an open slot (1.6) is axially formed in the middle of the upper limiting table (1.3).

10. An injection device with self-destruct function of fixed dose according to any of claims 1-9, characterized in that the elastic ferrule (3) is injection molded in one piece.

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