CA2878527A1 - Disposable injector with two-stage trigger - Google Patents
Disposable injector with two-stage trigger Download PDFInfo
- Publication number
- CA2878527A1 CA2878527A1 CA2878527A CA2878527A CA2878527A1 CA 2878527 A1 CA2878527 A1 CA 2878527A1 CA 2878527 A CA2878527 A CA 2878527A CA 2878527 A CA2878527 A CA 2878527A CA 2878527 A1 CA2878527 A1 CA 2878527A1
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- CA
- Canada
- Prior art keywords
- disposable injector
- housing
- displacer
- trigger
- actuating plunger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/30—Syringes for injection by jet action, without needle, e.g. for use with replaceable ampoules or carpules
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
- A61M2005/2073—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically preventing premature release, e.g. by making use of a safety lock
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2207/00—Methods of manufacture, assembly or production
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
- A61M5/2033—Spring-loaded one-shot injectors with or without automatic needle insertion
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- Health & Medical Sciences (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
- Catching Or Destruction (AREA)
Abstract
The invention relates to a disposable injector with a housing (10), and with a trigger device (80) comprising an energy storage means (50), an actuation ram (60) and a trigger sleeve (90). The actuation ram (60) and the housing (10) have blocking surfaces (17, 72) which are directed towards each other and between which at least one displacement body can be arranged. The actuation ram (60) is pivotable about the longitudinal axis (5) of the disposable injector and comprises displacement segments (73), which are arranged offset in relation to the blocking surfaces, such that the displacement segments can be brought into contact with the displacement body. Moreover, by means of a movement of the trigger sleeve (90) in the direction of the longitudinal axis, a travel limit of the displacement body loaded by the displacement segment can be cancelled for releasing the energy storage means.
Description
; CA 02878527 2015-01-07 Disposable injector with two-stage trigger Description:
The invention relates to a disposable injector having a housing and having a trigger device comprising an energy store, an actuating plunger and a trigger sleeve.
A disposable injector is known from the postpublished DE 10 2007 031 630 Al. The trigger mechanism is subjected to load by means of is throughout the storage time. The two-stage triggering can be realized without changing the grip position on the disposable injector.
The challenge of the present invention is to develop a disposable injector which affords secure triggering even after a long storage period. Moreover, the user is intended to deliberately unlock the disposable injector prior to the triggering.
This challenge is met with the features of the principal claim. To this end, the actuating plunger and the housing have mutually facing blocking surfaces, between which at least one displacement body can be disposed. The actuating element is pivotable about the longitudinal axis of the disposable injector and comprises displacer segments arranged offset from the blocking surfaces, so that the displacer segments can be brought into contact with the displacement body.
Moreover, by means of a shifting of the trigger sleeve in the direction of the longitudinal axis, a travel limitation of the displacer body subjected to load by means of the displacer segment can be lifted for the release of the energy store.
Further details of the invention emerge from the subclaims and the following descriptions of schematically represented illustrative embodiments.
), ,
The invention relates to a disposable injector having a housing and having a trigger device comprising an energy store, an actuating plunger and a trigger sleeve.
A disposable injector is known from the postpublished DE 10 2007 031 630 Al. The trigger mechanism is subjected to load by means of is throughout the storage time. The two-stage triggering can be realized without changing the grip position on the disposable injector.
The challenge of the present invention is to develop a disposable injector which affords secure triggering even after a long storage period. Moreover, the user is intended to deliberately unlock the disposable injector prior to the triggering.
This challenge is met with the features of the principal claim. To this end, the actuating plunger and the housing have mutually facing blocking surfaces, between which at least one displacement body can be disposed. The actuating element is pivotable about the longitudinal axis of the disposable injector and comprises displacer segments arranged offset from the blocking surfaces, so that the displacer segments can be brought into contact with the displacement body.
Moreover, by means of a shifting of the trigger sleeve in the direction of the longitudinal axis, a travel limitation of the displacer body subjected to load by means of the displacer segment can be lifted for the release of the energy store.
Further details of the invention emerge from the subclaims and the following descriptions of schematically represented illustrative embodiments.
), ,
- 2 -Figure 1: Disposable injector in the storage state;
figure 2: Section of the housing at the level of the apertures;
figure 3: Side view of the actuating element;
figure 4: View of the actuating element from below;
figure 5: Top view of the adapter sleeve;
figure 6: Detail of the disposable injector from fig.
1;
figure 7: Detail from figure 6;
figure 8: Detail of the disposable injector following pivoting of the actuating element;
figure 9: Detail of the disposable injector following actuation of the trigger element;
figure 10: Detail of the disposable injector with displaced displacement body;
figure 11: Detail of the triggered disposable injector;
figure 12: Detail of the trigger device having a broadly cuboid displacement body.
Figures 1 - 11 show a disposable injector (4).
Disposable injectors (4) of this type are used for the one-off introduction into the human body of a defined dose, for instance, of a solution containing an active substance. The solution (1) which is to be introduced through the skin, for example, is stored in a cylinder-piston unit (100). Following triggering of the disposable injector (4), the piston (111) of this cylinder-piston unit (100) is shifted in the direction of the discharge opening (127) and hereupon displaces the liquid drug solution (1) through a needle, or without a needle, under the skin.
The disposable injector (4) comprises a housing (10) and a trigger device (80). The housing (10) is of bell-like construction. On the inner side of the user-facing base (39), an energy store (50) is supported, for
figure 2: Section of the housing at the level of the apertures;
figure 3: Side view of the actuating element;
figure 4: View of the actuating element from below;
figure 5: Top view of the adapter sleeve;
figure 6: Detail of the disposable injector from fig.
1;
figure 7: Detail from figure 6;
figure 8: Detail of the disposable injector following pivoting of the actuating element;
figure 9: Detail of the disposable injector following actuation of the trigger element;
figure 10: Detail of the disposable injector with displaced displacement body;
figure 11: Detail of the triggered disposable injector;
figure 12: Detail of the trigger device having a broadly cuboid displacement body.
Figures 1 - 11 show a disposable injector (4).
Disposable injectors (4) of this type are used for the one-off introduction into the human body of a defined dose, for instance, of a solution containing an active substance. The solution (1) which is to be introduced through the skin, for example, is stored in a cylinder-piston unit (100). Following triggering of the disposable injector (4), the piston (111) of this cylinder-piston unit (100) is shifted in the direction of the discharge opening (127) and hereupon displaces the liquid drug solution (1) through a needle, or without a needle, under the skin.
The disposable injector (4) comprises a housing (10) and a trigger device (80). The housing (10) is of bell-like construction. On the inner side of the user-facing base (39), an energy store (50) is supported, for
- 3 -example by means of a spacer washer (19). In the illustrative embodiment, the energy store (50) is a spring element, for example a compression spring (50).
The use of a pyrotechnic energy store (50) is also conceivable. The housing (10) produced from an austenitic steel material or from plastic has a stepped wall (11), which widens toward an opening (38) remote from the base (39), cf. figure 6. This opening (38) is surrounded by an outer annular flange (12). The plane of the annular flange (12) is arranged perpendicular to the longitudinal direction (5) of the disposable injector (4). The width of the annular flange (12) in the radial direction is greater than or equal to the wall thickness of the housing (10).
In the lower shell region (14), the housing (10) has, for instance, four apertures (15) evenly distributed on the periphery. These apertures (15) have, for example, a broadly square cross section, wherein the corners can be rounded. The housing (10) can also have one, two or three apertures (15).
Figure 2 shows a cross section of the housing (10) with direction of view onto the annular flange (12), wherein the sectional plane intersects the apertures (15). On the bottom edges of the apertures (15), supporting elements (16) are bent inward. These are configured, for instance, in the shape of a circular segment. Those surfaces (17) of the supporting elements (16) which in figure 2 are facing the observer are hereinafter referred to as the blocking surfaces (17). These can lie in a plane perpendicular to the longitudinal direction (5). They can also however form with this plane - as represented in figure 7 - an angle up to 10 degrees. The inner ends of the blocking surfaces (17) are here arranged closer to the opening (38) than are the outer ends.
The use of a pyrotechnic energy store (50) is also conceivable. The housing (10) produced from an austenitic steel material or from plastic has a stepped wall (11), which widens toward an opening (38) remote from the base (39), cf. figure 6. This opening (38) is surrounded by an outer annular flange (12). The plane of the annular flange (12) is arranged perpendicular to the longitudinal direction (5) of the disposable injector (4). The width of the annular flange (12) in the radial direction is greater than or equal to the wall thickness of the housing (10).
In the lower shell region (14), the housing (10) has, for instance, four apertures (15) evenly distributed on the periphery. These apertures (15) have, for example, a broadly square cross section, wherein the corners can be rounded. The housing (10) can also have one, two or three apertures (15).
Figure 2 shows a cross section of the housing (10) with direction of view onto the annular flange (12), wherein the sectional plane intersects the apertures (15). On the bottom edges of the apertures (15), supporting elements (16) are bent inward. These are configured, for instance, in the shape of a circular segment. Those surfaces (17) of the supporting elements (16) which in figure 2 are facing the observer are hereinafter referred to as the blocking surfaces (17). These can lie in a plane perpendicular to the longitudinal direction (5). They can also however form with this plane - as represented in figure 7 - an angle up to 10 degrees. The inner ends of the blocking surfaces (17) are here arranged closer to the opening (38) than are the outer ends.
- 4 -In the housing (10) is arranged the actuating part (60). This is represented in a side view in figure 3 and in a view from below in figure 4. The actuating part (60) comprises a guide ring (62), a plunger (71) and a piston actuating rod (66).
The centering ring (62) seated on the plunger (71) encompasses and, in the illustrative embodiment, guides the spring (50) on its outer side. An inner centering and guidance of the spring (50) is also conceivable.
The diameter of the disk-like plunger (71) is, for instance, two-tenths of a millimeter smaller than the internal diameter of the housing (10). The plunger (71) is oriented, for example, perpendicular to the longitudinal direction (5) of the disposable injector (4).
In the illustrative embodiment, the bottom side of the actuating plunger (60), which bottom side is arranged opposite to the centering ring (62), has four blocking surfaces (72) and four displacer segments (73) arranged offset from these same. In the representations of figures 1, 3, 6 and 7, the blocking surfaces (72) are surface portions arranged in a plane perpendicular to the longitudinal axis (5). The displacer segments (73), which are arranged, for instance, relative to the longitudinal axis (5), respectively offset by an angle of 45 degrees hereto, respectively have a recess (74), which continues in the shell surface (75) of the centering ring (62). Each of the cylinder-segment-shaped recesses (74) projected into the plane of the blocking surfaces (72) has in this plane an area which is congruent to the blocking surface (17) of the housing (10), which blocking surface is projected into the same plane. The projected area of a recess (74) can also be greater than the projected blocking surface (17) of the housing (10). The individual recess (74) can also be a segment of the plunger (71). The
The centering ring (62) seated on the plunger (71) encompasses and, in the illustrative embodiment, guides the spring (50) on its outer side. An inner centering and guidance of the spring (50) is also conceivable.
The diameter of the disk-like plunger (71) is, for instance, two-tenths of a millimeter smaller than the internal diameter of the housing (10). The plunger (71) is oriented, for example, perpendicular to the longitudinal direction (5) of the disposable injector (4).
In the illustrative embodiment, the bottom side of the actuating plunger (60), which bottom side is arranged opposite to the centering ring (62), has four blocking surfaces (72) and four displacer segments (73) arranged offset from these same. In the representations of figures 1, 3, 6 and 7, the blocking surfaces (72) are surface portions arranged in a plane perpendicular to the longitudinal axis (5). The displacer segments (73), which are arranged, for instance, relative to the longitudinal axis (5), respectively offset by an angle of 45 degrees hereto, respectively have a recess (74), which continues in the shell surface (75) of the centering ring (62). Each of the cylinder-segment-shaped recesses (74) projected into the plane of the blocking surfaces (72) has in this plane an area which is congruent to the blocking surface (17) of the housing (10), which blocking surface is projected into the same plane. The projected area of a recess (74) can also be greater than the projected blocking surface (17) of the housing (10). The individual recess (74) can also be a segment of the plunger (71). The
- 5 -individual displacer segment (73) can comprise an inclined plane. The blocking surfaces (72) and the displacement segments (73) are inwardly limited by a limiting ring (76). This has a cylindrical shell surface (77), The piston actuating rod (66), the so-called piston slide valve (66)1 is arranged opposite to the guide ring (62) centrically on the plunger (71). In the installed state, its projecting end (67) penetrates the opening (38) of the housing (10). In the illustrative embodiment, the piston slide valve (66) has a constant, square cross section. It is also conceivable, however, to configure the piston slide valve (66) with a triangular, hexagonal, polygonal, etc. cross section.
In the installed state, cf. figure 1, the free end (67) is immersed in the cylinder (101) and ends just a few millimeters above the piston (111). The diagonal of the cross-sectional area of the piston slide valve (66) is smaller than the internal diameter of the cylinder (101). The actuating rod (66) can thus be guidable in the cylinder (101).
In the representation of figure 1, between the blocking surfaces (17, 72) of the housing (10) and of the actuating part (60) are arranged displacement bodies (86). In the represented illustrative embodiment, these are balls (86), which are supported on both blocking surfaces (17, 72). In the illustrative embodiment, the two contact points are arranged one above the other.
Where necessary, the trigger sleeve (90), which closes off the apertures (15), also prevents excursion of the balls (86). In the case of a housing blocking surface (17) which rises from inside to out, the balls (86) are subjected to load inward in the direction of the limiting ring (76). The radius of the displacement bodies (86) can be smaller than or equal to the imaginary radius of the recesses (74).
In the installed state, cf. figure 1, the free end (67) is immersed in the cylinder (101) and ends just a few millimeters above the piston (111). The diagonal of the cross-sectional area of the piston slide valve (66) is smaller than the internal diameter of the cylinder (101). The actuating rod (66) can thus be guidable in the cylinder (101).
In the representation of figure 1, between the blocking surfaces (17, 72) of the housing (10) and of the actuating part (60) are arranged displacement bodies (86). In the represented illustrative embodiment, these are balls (86), which are supported on both blocking surfaces (17, 72). In the illustrative embodiment, the two contact points are arranged one above the other.
Where necessary, the trigger sleeve (90), which closes off the apertures (15), also prevents excursion of the balls (86). In the case of a housing blocking surface (17) which rises from inside to out, the balls (86) are subjected to load inward in the direction of the limiting ring (76). The radius of the displacement bodies (86) can be smaller than or equal to the imaginary radius of the recesses (74).
- 6 -The displacement bodies (86) can also be of broadly wedge-shaped or cuboid configuration in cross section.
A body of this type is represented, for instance, in figure 12. It comprises two locking surfaces (87, 88) arranged, for example, parallel to each other.
Inwardly, the upper locking surface (87) adjoins a displacer surface (89). The latter forms with a straight line parallel to the longitudinal direction (5), for instance, an angle less than or equal to 45 degrees.
The annular flange (12) of the housing (10) is held in an adapter assembly (130), cf. figures 6 and 7. This adapter assembly (130) comprises an adapter sleeve (131) and an adapter ring (151). Both parts are made, for instance, of a thermoplastic plastic.
The adapter sleeve (131) has a broadly pot-shaped form.
At its end facing away from the energy store (50), it has, for example, expandable undercut elements (132), which, in the mounted state, hold the cylinder-piston unit (100). At its end facing toward the energy store (50), the adapter sleeve (131) has a back-up ring (133) having a flat top side. The shell surface (134) of the back-up ring (133) has an external thread (135). In the representation of figure 7, a flat (136) for the application of an assembly tool is arranged beneath this thread (135).
Figure 5 shows a top view of the adapter sleeve (131).
The upwardly directed circular base plate (137) has in this representation a square aperture (138). Through this aperture (138) is guided, in the mounted state, the piston actuating rod (66). The clearance of the actuating rod (66) in the aperture (138) is, for instance, less than two-tenths of a millimeter. The top side of the back-up ring (133) comprises an outer
A body of this type is represented, for instance, in figure 12. It comprises two locking surfaces (87, 88) arranged, for example, parallel to each other.
Inwardly, the upper locking surface (87) adjoins a displacer surface (89). The latter forms with a straight line parallel to the longitudinal direction (5), for instance, an angle less than or equal to 45 degrees.
The annular flange (12) of the housing (10) is held in an adapter assembly (130), cf. figures 6 and 7. This adapter assembly (130) comprises an adapter sleeve (131) and an adapter ring (151). Both parts are made, for instance, of a thermoplastic plastic.
The adapter sleeve (131) has a broadly pot-shaped form.
At its end facing away from the energy store (50), it has, for example, expandable undercut elements (132), which, in the mounted state, hold the cylinder-piston unit (100). At its end facing toward the energy store (50), the adapter sleeve (131) has a back-up ring (133) having a flat top side. The shell surface (134) of the back-up ring (133) has an external thread (135). In the representation of figure 7, a flat (136) for the application of an assembly tool is arranged beneath this thread (135).
Figure 5 shows a top view of the adapter sleeve (131).
The upwardly directed circular base plate (137) has in this representation a square aperture (138). Through this aperture (138) is guided, in the mounted state, the piston actuating rod (66). The clearance of the actuating rod (66) in the aperture (138) is, for instance, less than two-tenths of a millimeter. The top side of the back-up ring (133) comprises an outer
- 7 -pressing surface (139) and an inner sliding surface (141) which is concentric thereto and adjoins the same.
The adapter ring (151) has a circular aperture (152).
The diameter of the aperture (152) is greater than the outer diameter of the housing (10) and less than the outer diameter of the annular flange (12). The bottom side of the adapter ring (151) comprises an axial (153) and a radial sliding surface (154), which, in the mounted state, together with the sliding surface (141) of the adapter sleeve (131), surround the annular flange (12) of the housing (10). The radial and the axial clearance of the slide bearing (145) respectively amount to, for instance, one-tenth of a millimeter.
Outside the sliding surface (153) of the adapter ring (151) is arranged a pressing ring (155). In the installed state, this contacts the pressing surface (139) of the adapter sleeve (131). Outside the pressing ring (155), a fastening ring (156) protrudes on the bottom side of the adapter ring (151). This fastening ring has an internal thread (157) complementary to the external thread (135) of the adapter sleeve (131) and, on its shell surface (158), flats (159). In the assembly operation, the adapter sleeve (131) and the adapter ring (151) can thus be mounted with pretension.
The trigger sleeve (90) is of annular construction. It encompasses the housing (10) and is guided on the same.
The total guide length can be greater than or equal to double the housing diameter. In the illustrative embodiment, the trigger sleeve (90) is made of a two-component material. In the representations of figures 1 and 6, it has a bottom guide and locking ring (91) and a wall region (99), which are made of a deformation-resistant material. A top sealing lip (92) is made, for instance, of an elastically deformable material. Both materials can be thermoplastic plastics.
The adapter ring (151) has a circular aperture (152).
The diameter of the aperture (152) is greater than the outer diameter of the housing (10) and less than the outer diameter of the annular flange (12). The bottom side of the adapter ring (151) comprises an axial (153) and a radial sliding surface (154), which, in the mounted state, together with the sliding surface (141) of the adapter sleeve (131), surround the annular flange (12) of the housing (10). The radial and the axial clearance of the slide bearing (145) respectively amount to, for instance, one-tenth of a millimeter.
Outside the sliding surface (153) of the adapter ring (151) is arranged a pressing ring (155). In the installed state, this contacts the pressing surface (139) of the adapter sleeve (131). Outside the pressing ring (155), a fastening ring (156) protrudes on the bottom side of the adapter ring (151). This fastening ring has an internal thread (157) complementary to the external thread (135) of the adapter sleeve (131) and, on its shell surface (158), flats (159). In the assembly operation, the adapter sleeve (131) and the adapter ring (151) can thus be mounted with pretension.
The trigger sleeve (90) is of annular construction. It encompasses the housing (10) and is guided on the same.
The total guide length can be greater than or equal to double the housing diameter. In the illustrative embodiment, the trigger sleeve (90) is made of a two-component material. In the representations of figures 1 and 6, it has a bottom guide and locking ring (91) and a wall region (99), which are made of a deformation-resistant material. A top sealing lip (92) is made, for instance, of an elastically deformable material. Both materials can be thermoplastic plastics.
- 8 -Between the sealing lip (92) and the guide and locking ring (91) is arranged a receiving chamber (95), which is limited by means of the wall region (99). The extent of the receiving chamber (95) in the radial direction is in the mounted state greater than the diameter of a displacement body (86). In the case of a non-spherical displacement body (86), the radial length of the receiving chamber (95) is greater than the maximum extent of the displacement body (86) in this direction.
In the representations of figures 1, 6 and 7, the guide and locking ring (91) has a bottom guide portion (93) having two single-valued slide bearings (94), and a locking portion (96) arranged above said guide portion.
The locking portion (96) has a cylindrical inner wall and merges in a transition radius (97) into the bottom surface (98) of the receiving chamber (95).
Where necessary, the trigger sleeve (90), in the mounted state, can be spring-loaded or be prevented from slippage by means of a band.
In the assembly of the disposable injector (4), the energy store (50) and the actuating plunger (60), for instance, are firstly inserted into the housing (10).
The cavities (74) of the actuating part (60) are here guided along the supporting elements (16) of the housing (10). The adapter ring (151) is now placed from above onto the housing (10). From the bottom, the adapter sleeve (131) is slipped onto the actuating part (60). When the threads (135, 157) of the adapter ring (151) and of the adapter sleeve (131) are screwed together, the pressing ring (155) and the pressing surface (139) are subjected to load. Thus, in dependence on the pretension of the screw connection, the clearance of the slide bearing (145) can be adjusted and the screw connection can be secured
In the representations of figures 1, 6 and 7, the guide and locking ring (91) has a bottom guide portion (93) having two single-valued slide bearings (94), and a locking portion (96) arranged above said guide portion.
The locking portion (96) has a cylindrical inner wall and merges in a transition radius (97) into the bottom surface (98) of the receiving chamber (95).
Where necessary, the trigger sleeve (90), in the mounted state, can be spring-loaded or be prevented from slippage by means of a band.
In the assembly of the disposable injector (4), the energy store (50) and the actuating plunger (60), for instance, are firstly inserted into the housing (10).
The cavities (74) of the actuating part (60) are here guided along the supporting elements (16) of the housing (10). The adapter ring (151) is now placed from above onto the housing (10). From the bottom, the adapter sleeve (131) is slipped onto the actuating part (60). When the threads (135, 157) of the adapter ring (151) and of the adapter sleeve (131) are screwed together, the pressing ring (155) and the pressing surface (139) are subjected to load. Thus, in dependence on the pretension of the screw connection, the clearance of the slide bearing (145) can be adjusted and the screw connection can be secured
- 9 -against loosening. The trigger sleeve (90) is slipped onto the housing (10) from above.
The actuating part (60) can now be slid in from its free end (67) relative to the housing (10) and to the adapter assembly (130), so that the spring (50) is compressed. The energy store is hereupon loaded. The adapter assembly (130) can now be pivoted, for example, through an angle of 45 degrees relative to the housing
The actuating part (60) can now be slid in from its free end (67) relative to the housing (10) and to the adapter assembly (130), so that the spring (50) is compressed. The energy store is hereupon loaded. The adapter assembly (130) can now be pivoted, for example, through an angle of 45 degrees relative to the housing
(10). In this course of this pivoting, the adapter sleeve (131), by means of the form closure between the aperture (138) and the piston slide valve (66), takes the actuating part (GO) along with it. The blocking surfaces (72) of the actuating part (60) now stand above the blocking surfaces (17) of the housing (10).
After the component parts have been secured in this position, the displacement bodies (86) are inserted. To this end, the trigger sleeve (90) is pushed downward, for instance, in the triggering direction (6). After the sealing lip (92) has been bent up, the balls (86) can be fed into the now open receiving chamber (95).
Through the apertures (15), the displacement bodies (86) are then inserted between the blocking surfaces (17, 72). The temporary assembly securement of the actuating part (60) and of the spring (50) can now be undone. The spring-loaded plunger (71) now presses the balls (86) against the blocking surfaces (17) of the housing (10). The disposable injector (4) is locked.
The trigger sleeve (90) can be pushed upward again and is secured, for example, by means of a tamper-evident closure.
The filled cylinder-piston unit (100) is inserted into the adapter sleeve (131) and non-releasably latched, for instance.
The disposable injector (4) - with or without built-in cylinder-piston unit (100) - can be stored for several months or years-In order to use the disposable injector (4), the doctor or patient holds the injector (4) with two hands and twists the adapter assembly (130) relative to the housing (10). With the pivoting of the adapter assembly (130), the actuating plunger (60) is transported via the positive connection (66, 138). The housing (10) pivots relative to the adapter assembly (130) in the slide bearing (145). The apertures (15) and/or the form of the supporting elements (16) prevent excursion of the balls (86). The displacer segments (73) come into contact with the displacer bodies (86), of. figure 8.
The spring (50) is hereupon slackened by just a few tenths of a millimeter, so that the disposable injector (4) latches in this position. A further pivoting of the adapter assembly (130) and of the actuating plunger (60) is not possible.
The force application to the ball (86) has relocated inward, so that the ball (86) is displaced outward in the direction of the locking portion (96) of the trigger sleeve (90). The ball (86) abuts against the locking portion (96), which prevents further displacement of the ball (86). The first securement of the two-stage trigger mechanism is herewith lifted.
After the disposable injector (4) has been applied to the skin of the patient, the injector (4) can be triggered. To this end, the trigger sleeve (90) is pushed in the triggering direction (6), in the representation of figure 1 downward. The travel limitation of the displacement body (86) is lifted, cf.
figure 9. The state represented in figure 9 is not stable, for, after the locking mechanism has been lifted, the discharging energy store (50), by means of
After the component parts have been secured in this position, the displacement bodies (86) are inserted. To this end, the trigger sleeve (90) is pushed downward, for instance, in the triggering direction (6). After the sealing lip (92) has been bent up, the balls (86) can be fed into the now open receiving chamber (95).
Through the apertures (15), the displacement bodies (86) are then inserted between the blocking surfaces (17, 72). The temporary assembly securement of the actuating part (60) and of the spring (50) can now be undone. The spring-loaded plunger (71) now presses the balls (86) against the blocking surfaces (17) of the housing (10). The disposable injector (4) is locked.
The trigger sleeve (90) can be pushed upward again and is secured, for example, by means of a tamper-evident closure.
The filled cylinder-piston unit (100) is inserted into the adapter sleeve (131) and non-releasably latched, for instance.
The disposable injector (4) - with or without built-in cylinder-piston unit (100) - can be stored for several months or years-In order to use the disposable injector (4), the doctor or patient holds the injector (4) with two hands and twists the adapter assembly (130) relative to the housing (10). With the pivoting of the adapter assembly (130), the actuating plunger (60) is transported via the positive connection (66, 138). The housing (10) pivots relative to the adapter assembly (130) in the slide bearing (145). The apertures (15) and/or the form of the supporting elements (16) prevent excursion of the balls (86). The displacer segments (73) come into contact with the displacer bodies (86), of. figure 8.
The spring (50) is hereupon slackened by just a few tenths of a millimeter, so that the disposable injector (4) latches in this position. A further pivoting of the adapter assembly (130) and of the actuating plunger (60) is not possible.
The force application to the ball (86) has relocated inward, so that the ball (86) is displaced outward in the direction of the locking portion (96) of the trigger sleeve (90). The ball (86) abuts against the locking portion (96), which prevents further displacement of the ball (86). The first securement of the two-stage trigger mechanism is herewith lifted.
After the disposable injector (4) has been applied to the skin of the patient, the injector (4) can be triggered. To this end, the trigger sleeve (90) is pushed in the triggering direction (6), in the representation of figure 1 downward. The travel limitation of the displacement body (86) is lifted, cf.
figure 9. The state represented in figure 9 is not stable, for, after the locking mechanism has been lifted, the discharging energy store (50), by means of
- 11 -the plunger (71), displaces the ball (86) outward into the receiving chamber (95), cf. figure 10.
The accelerated actuating part (60) strikes with the actuating rod (66) the piston (111) of the cylinder-piston unit (100). The piston (111) which has been shifted in the direction of the discharge opening (127) displaces the stored drug solution (1) through the discharge opening (127) into the skin of the patient.
The actuating plunger (60) here travels relative to the displacement body (86) situated in the housing (10) and/or in the receiving chamber (95). Where necessary, the displacement body (86) can also jut into the cavities (74) of the plunger (71).
As soon as the piston (111) and the actuating part (60) stand in the front end position, the ball (86) can be situated above the guide ring (62). If the trigger sleeve (90) is now pulled back upward, the ball (86) can be displaced into the housing (10), for example by means of a sloping bottom surface (98). The displacement body (86) can then block renewed insertion of the actuating element (60) into the housing (10).
Reuse of the disposable injector (4) is thus effectively prevented.
Of course, it is also conceivable to combine the various stated embodiments one with another,
The accelerated actuating part (60) strikes with the actuating rod (66) the piston (111) of the cylinder-piston unit (100). The piston (111) which has been shifted in the direction of the discharge opening (127) displaces the stored drug solution (1) through the discharge opening (127) into the skin of the patient.
The actuating plunger (60) here travels relative to the displacement body (86) situated in the housing (10) and/or in the receiving chamber (95). Where necessary, the displacement body (86) can also jut into the cavities (74) of the plunger (71).
As soon as the piston (111) and the actuating part (60) stand in the front end position, the ball (86) can be situated above the guide ring (62). If the trigger sleeve (90) is now pulled back upward, the ball (86) can be displaced into the housing (10), for example by means of a sloping bottom surface (98). The displacement body (86) can then block renewed insertion of the actuating element (60) into the housing (10).
Reuse of the disposable injector (4) is thus effectively prevented.
Of course, it is also conceivable to combine the various stated embodiments one with another,
- 12 -Reference symbol list:
1 Drug solution 4 Disposable injector, single-use injector 5 Center line of the injector, longitudinal direction 6 Direction arrow for triggering motion direction, downward motion 10 housing 11 wall 12 annular flange 14 shell region 15 apertures 16 supporting elements 17 surfaces, blocking surfaces 19 spacer washer 38 opening 39 base 50 energy store, spring element, compression spring 60 actuating part, actuating plunger, actuating element 62 guide ring, centering ring, guide element for (50) 66 piston actuating rod, piston slide valve 67 projecting end of (66), free end of (66) 71 plunger 72 blocking surfaces 73 displacer segments 74 recesses, cavities 75 shell surface of (71)
1 Drug solution 4 Disposable injector, single-use injector 5 Center line of the injector, longitudinal direction 6 Direction arrow for triggering motion direction, downward motion 10 housing 11 wall 12 annular flange 14 shell region 15 apertures 16 supporting elements 17 surfaces, blocking surfaces 19 spacer washer 38 opening 39 base 50 energy store, spring element, compression spring 60 actuating part, actuating plunger, actuating element 62 guide ring, centering ring, guide element for (50) 66 piston actuating rod, piston slide valve 67 projecting end of (66), free end of (66) 71 plunger 72 blocking surfaces 73 displacer segments 74 recesses, cavities 75 shell surface of (71)
- 13 -76 limiting ring 77 shell surface of (76) 80 trigger device 86 displacement bodies, balls 87 locking surface 88 locking surface 89 displacer surface 90 trigger sleeve 91 guide and snap ring 92 sealing lip 93 guide portion 94 slide bearing 95 receiving chamber 96 locking portion 97 transition radius 98 bottom surface 99 wall region 100 cylinder-piston unit 101 cylinder 111 piston 127 discharge opening 130 adapter assembly 131 adapter sleeve 132 undercut elements 133 back-up ring 134 shell surface 135 external thread 136 flat 137 circular base plate 138 aperture 139 pressing surface
- 14 -141 sliding surface 145 slide bearing 151 adapter ring 152 aperture 153 axial sliding surface 154 radial sliding surface 155 pressing ring 156 fastening ring 157 internal thread 158 shell surface 159 flats
Claims (7)
1. A disposable injector (4) having a housing (10) and having a trigger device (80) comprising an energy store (50), an actuating plunger (60) and a trigger sleeve (90), characterized - in that the actuating plunger (60) and the housing (10) have mutually facing blocking surfaces (17, 72), between which at least one displacement body (86) can be disposed, - in that the actuating plunger (60) is pivotable about the longitudinal axis (5) of the disposable injector (4) and comprises displacer segments (73) arranged offset from the blocking surfaces (17, 72), so that the displacer segments (73) can be brought into contact with the displacement body (86), - in that, by means of a shifting of the trigger sleeve (90) in the direction of the longitudinal axis (5), a travel limitation of the displacer body (86) subjected to load by means of the displacer segment (73) can be lifted for the release of the energy store (50),
2. The disposable injector (4) as claimed in claim 1, characterized in that it comprises an adapter assembly (130), positively connected to the actuating plunger (60), for receiving a cylinder piston unit (100).
3. The disposable injector (4) as claimed in claim 2, characterized in that the adapter assembly (130) is pivotable relative to the housing (10).
4. The disposable injector (4) as claimed in claim 1, characterized in that the energy store (50) comprises a compression spring.
5. The disposable injector (4) as claimed in claim 1, characterized in that the actuating plunger (60) comprises a guide element (62) for the energy store (50).
6. The disposable injector (4) as claimed in claim 1, characterized in that the displacer segments (73) of the actuating plunger (60) have cavities (74), wherein the surfaces of the cavities (74) are, in a perpendicular plane to the longitudinal direction (5), congruent to the or larger than the blocking surfaces (17) of the housing (10) in a parallel plane.
7. The disposable injector (4) as claimed in claim 1, characterized in that the trigger sleeve (90) comprises an openable receiving chamber (95).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP12182782.8A EP2703022A1 (en) | 2012-09-03 | 2012-09-03 | One-off injector with two step disengagement |
| EP12182782.8 | 2012-09-03 | ||
| PCT/EP2013/067867 WO2014033198A1 (en) | 2012-09-03 | 2013-08-29 | Disposable injector with two-stage trigger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2878527A1 true CA2878527A1 (en) | 2014-03-06 |
| CA2878527C CA2878527C (en) | 2020-01-07 |
Family
ID=46785298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2878527A Expired - Fee Related CA2878527C (en) | 2012-09-03 | 2013-08-29 | Disposable injector with two-stage trigger |
Country Status (8)
| Country | Link |
|---|---|
| EP (2) | EP2703022A1 (en) |
| JP (1) | JP6268177B2 (en) |
| CN (1) | CN104582764B (en) |
| BR (1) | BR112015000708A2 (en) |
| CA (1) | CA2878527C (en) |
| ES (1) | ES2717025T3 (en) |
| HK (1) | HK1209071A1 (en) |
| WO (1) | WO2014033198A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2900219B1 (en) * | 2012-09-27 | 2016-07-06 | Basf Se | A storage-stable dust-free homogeneous particulate formulation comprising at least one water-soluble vitamin e-derivative and at least one hydrophilic polymer |
| CN108601902B (en) * | 2015-11-27 | 2021-07-02 | 赛诺菲-安万特德国有限公司 | Drug delivery device with cap |
| US11318256B2 (en) | 2016-04-16 | 2022-05-03 | Shl Medical Ag | Injection device |
| CN108066854A (en) * | 2016-11-16 | 2018-05-25 | 浙江九天寰宇生物科技有限公司 | A kind of needleless hair style syringe |
| US10946146B2 (en) * | 2016-12-22 | 2021-03-16 | Epic Medical Pte. Ltd. | Syringe driving apparatus and system |
| CN111110958B (en) * | 2020-02-06 | 2021-08-17 | 唐文珍 | Syringe used in medical field |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH400462A (en) * | 1961-10-07 | 1965-10-15 | Penicillin Ges Dauelsberg & Co | Injection syringe |
| AU6550990A (en) * | 1989-11-09 | 1991-05-16 | Bioject, Inc. | Needleless hypodermic injection device |
| US5843036A (en) * | 1996-08-23 | 1998-12-01 | Becton Dickinson And Company | Non-dosing cartridge for an injection device |
| JP2002000725A (en) * | 2000-06-20 | 2002-01-08 | Eisuke Fujimoto | Disposable needleless injector |
| JP2002360691A (en) * | 2001-06-11 | 2002-12-17 | Eisuke Fujimoto | Portable needleless syringe |
| WO2007075677A2 (en) * | 2005-12-20 | 2007-07-05 | Antares Pharma, Inc. | Needle-free injection device |
| DE102007031630B3 (en) | 2007-07-06 | 2008-12-24 | Lts Lohmann Therapie-Systeme Ag | Disposable injector with at least one support rod |
-
2012
- 2012-09-03 EP EP12182782.8A patent/EP2703022A1/en not_active Withdrawn
-
2013
- 2013-08-29 CA CA2878527A patent/CA2878527C/en not_active Expired - Fee Related
- 2013-08-29 EP EP13756119.7A patent/EP2892591B1/en not_active Not-in-force
- 2013-08-29 WO PCT/EP2013/067867 patent/WO2014033198A1/en unknown
- 2013-08-29 CN CN201380044048.6A patent/CN104582764B/en not_active Expired - Fee Related
- 2013-08-29 BR BR112015000708A patent/BR112015000708A2/en active Search and Examination
- 2013-08-29 ES ES13756119T patent/ES2717025T3/en active Active
- 2013-08-29 JP JP2015529019A patent/JP6268177B2/en not_active Expired - Fee Related
-
2015
- 2015-10-06 HK HK15109743.4A patent/HK1209071A1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| EP2892591B1 (en) | 2018-12-26 |
| EP2703022A1 (en) | 2014-03-05 |
| HK1209071A1 (en) | 2016-03-24 |
| JP2015533530A (en) | 2015-11-26 |
| JP6268177B2 (en) | 2018-01-24 |
| BR112015000708A2 (en) | 2017-06-27 |
| CN104582764A (en) | 2015-04-29 |
| CA2878527C (en) | 2020-01-07 |
| ES2717025T3 (en) | 2019-06-18 |
| WO2014033198A1 (en) | 2014-03-06 |
| EP2892591A1 (en) | 2015-07-15 |
| CN104582764B (en) | 2018-06-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |
Effective date: 20180215 |
|
| MKLA | Lapsed |
Effective date: 20210830 |