US20070135771A1 - Injection Device and Needle Covering Device - Google Patents
Injection Device and Needle Covering Device Download PDFInfo
- Publication number
- US20070135771A1 US20070135771A1 US11/677,681 US67768107A US2007135771A1 US 20070135771 A1 US20070135771 A1 US 20070135771A1 US 67768107 A US67768107 A US 67768107A US 2007135771 A1 US2007135771 A1 US 2007135771A1
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- United States
- Prior art keywords
- needle
- cover
- reservoir
- injection device
- injection
- 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.)
- Abandoned
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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
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
- A61M5/321—Means for protection against accidental injuries by used needles
- A61M5/3243—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
- A61M5/3257—Semi-automatic sleeve extension, i.e. in which triggering of the sleeve extension requires a deliberate action by the user, e.g. manual release of spring-biased extension means
-
- 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
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
- A61M5/321—Means for protection against accidental injuries by used needles
- A61M5/3243—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
- A61M5/3245—Constructional features thereof, e.g. to improve manipulation or functioning
- A61M2005/3247—Means to impede repositioning of protection sleeve from needle covering to needle uncovering position
-
- 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
-
- 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
- A61M5/24—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic
-
- 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
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31533—Dosing mechanisms, i.e. setting a dose
- A61M5/31545—Setting modes for dosing
- A61M5/31546—Electrically operated dose setting, e.g. input via touch screen or plus/minus buttons
-
- 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
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31533—Dosing mechanisms, i.e. setting a dose
- A61M5/31545—Setting modes for dosing
- A61M5/31548—Mechanically operated dose setting member
- A61M5/3155—Mechanically operated dose setting member by rotational movement of dose setting member, e.g. during setting or filling of a syringe
- A61M5/31553—Mechanically operated dose setting member by rotational movement of dose setting member, e.g. during setting or filling of a syringe without axial movement of dose setting member
-
- 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
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
- A61M5/3159—Dose expelling manners
- A61M5/31591—Single dose, i.e. individually set dose administered only once from the same medicament reservoir, e.g. including single stroke limiting means
-
- 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
- A61M5/46—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 having means for controlling depth of insertion
Definitions
- the present invention relates to an injection device for injecting a fluid product that includes a needle covering device.
- Injection devices are used for administering a fluid product such as a medicine, an infusion solution, or a contrast agent from a reservoir, e.g., an ampoule.
- a fluid product such as a medicine, an infusion solution, or a contrast agent from a reservoir, e.g., an ampoule.
- An injection needle or cannula is used to inject the fluid product into human or animal tissue.
- the reservoir should be able to be quickly and easily replaced.
- the injection needle may be covered when not in use.
- the injection needle should be quickly and reliably accessible when the fluid product is to be administered.
- many users of injection devices have a psychological aversion (so-called “needle phobia”) to injection needles, it may be beneficial to obscure from view at least a portion of the injection needle.
- slip-on covering caps which can be removed or pushed together for covering needles are disclosed in WO 96/11026.
- retractable needle covering devices cover at least the end of the injection needle. The cover is retracted so that the injection needle can be injected into the tissue.
- Such needle covering devices are disclosed in U.S. Pat. No. 4,804,372 and DE 40 13 769 A1. These injection devices are comparatively long. Thus, when attempting to place the injection needle at an angle to the surface of the tissue, the injection needle may bend and the needle and cover may draw relatively near, to the point where the injection needle jams in the needle cover. Moreover, replacing the fluid product reservoir is complicated, since the needle covering device has to be removed before the reservoir is replaced. The covering device must then be replaced afterwards on the new reservoir, which in the case of complicated injection devices, for example those comprising electronics, can lead to significant time loss and sources of danger.
- the present invention is an injection device wherein a fluid product reservoir, e.g., an ampoule, can be replaced quickly and easily. Moreover, the injection device is reliable and easy to handle. A needle covering device for such an injection device is also to be provided.
- the injection device includes a casing having at least two casing portions; a mounting for the reservoir and an activating element for triggering fluid product administering.
- One casing portion at least partially surrounds the reservoir and can be moved relative to the reservoir (or to the other casing portions).
- the reservoir and/or an injection needle connected to the reservoir is accessible from the outer side of the casing and can be replaced.
- the reservoir e.g., an ampoule
- the movable casing portion may be formed comparatively small in comparison to the non-movable casing portions; that is, adapted to the size of the reservoir to be replaced.
- the actual casing or main casing of the injection device can contain the elements necessary for it to operate.
- complex mechanism such as a counter and display means (including any required circuitry) can be disposed within the casing.
- such parts can include a dosing means, an activating means and similar elements that are not altered in their positions relative to each other when a reservoir is replaced.
- their settings relative to each other also do not have to be reset when the reservoir is replaced.
- dirt and moisture are prevented or at least hindered in reaching sensitive parts.
- the injection device can be operated more reliably and with less maintenance.
- the more sensitive parts of the injection device can be sealed against dirt, dust and moisture and other environmental influences.
- the movable casing portion can be moved in an axial direction (relative to the reservoir) between a forward position and a retracted position. Replacement of the reservoir and/or an injection needle occurs when the moveable casing is in the retracted position and prevented (or at least hindered) in the forward position.
- the movable casing portion may also be movable in other directions relative to the reservoir. For example, the moveable portion may move perpendicular to the axial direction, i.e., away from the main casing of the injection device, in order to provide a suitable space such that the reservoir and/or the injection needle can be grasped from the outer side of the casing for replacement.
- an injection device in one embodiment includes a casing having at least two casing portions, a mounting for the reservoir and an activating element for triggering fluid product administering.
- One casing portion at least partially surrounds the reservoir and can be moved relative to the reservoir or to the other casing portions of the injection device, such that by moving the movable casing portion, the reservoir and/or an injection needle connected to the same is accessible from the outer side of the casing, in order to be replaced.
- the needle protrudes beyond a forward end of the injection device.
- the position of the movable casing portion is adapted to the position and length of the injection needle.
- the forward end of the movable casing portion protrudes beyond the forward end of the casing of the injection device and the needle.
- the movable casing portion can be moved back beyond the forward end of the reservoir, where the injection needle is conventionally connected to the reservoir, such that the forward part of the reservoir can be handled.
- the needle covering device can be retracted back beyond the forward end of the reservoir by a distance that approximates the width of an average finger, so that the reservoir can at least be grasped by two fingers for removal.
- the casing portion can include a forward part and a forward end of the reservoir can protrude from the forward end of the forward part and the movable casing portion can be movable back at least as far as the forward end of the forward part, such that the forward end of the reservoir can easily be grasped from the outer side of the casing, i.e., from its facing side, in order to be replaced.
- the movable casing portion is simultaneously formed as a needle cover for the injection needle and serves to protect against the injection needle being unintentionally injected into a tissue or unintentionally touched.
- the needle cover includes at least one section which can be moved relative to the casing, or is formed by such a section, such that at least a forward end of the injection needle is covered by the cover in a forward protective position of the cover, and protrudes from a forward end of the cover in a retracted position of the cover.
- the cover is substantially tube-shaped and has a circular, elliptical, rectangular or polyhedral cross-section. Due to a lateral opening in the cover, it can be laterally attached to the injection device, at least partially surrounding the fluid product reservoir.
- This type of arrangement enables a range of advantages.
- the fluid product reservoir can be attached laterally to the injection device, such that the conventionally used elongated reservoirs (e.g., ampoules) can be practically supported along their entire length on a side wall of the casing.
- the reservoir attachment is mechanically stable, especially with regard to twisting and bending forces.
- injection devices of shorter lengths can be provided, given fluid product reservoirs of comparable length, such that overall weaker leverage forces are acting on the injection needle and/or the needle covering device.
- the somewhat larger width of such an injection device is not disruptive. Rather a large width is often advantageous, since otherwise relatively narrow, pen-shaped injection devices can then be formed such that they are easily grasped, for example fitting into a patient's fist.
- the reservoir together with the injection needle is more accessible and can be more easily replaced and monitored.
- the fluid product reservoir can easily be grasped for replacement, once the cover has been retracted.
- the reservoir can be grasped and rotated and thus screwed in or out.
- the injection needle is nonetheless reliably and mechanically covered in the forward protective position of the needle cover, since when attached laterally to a casing of an injection device, the needle cover is laterally supported substantially along its entire length.
- the cover has a semi-circular cross section with two side wall sections running substantially in a straight line, as seen in cross-section.
- the side wall sections laterally define an opening in the cover.
- the diameter of the semi-circular section is adapted to the diameter of the fluid product reservoir.
- the semi-circular section enables a structurally stable and visually appealing cover.
- the length of the side wall sections is selected such that, when the needle covering device is arranged laterally on an injection device, the side walls of the fluid product reservoir are supported by a side wall of the injection device. In this way, the fluid product reservoir is held in a structurally stable way.
- the opening angle of the opening can also be selected such that the cover encompasses the fluid product reservoir by more than 270°, so that a syringe or ampoule can be supported in a cavity arranged in a side wall of the injection device.
- the moveable portion of the cover is preferably returned to the forward protective position by a restoring element, such that the injection needle is always covered in its resting state.
- At least one protrusion can be provided on the cover to hold the restoring element.
- the protrusion meshes with a longitudinal slit of the injection device and is guided in it when retracted.
- the protrusion includes a trunnion or a comparable mounting for the restoring element.
- the other end of the restoring element is supported in the casing of the injection device.
- the cover can be formed as one piece, wherein the cover interconnects with at least one guide in the casing of the injection device and can be moved, that is guided, relative to the casing.
- the cover is designed in at least two pieces, and includes one or more covering elements that can be longitudinally telescoped relative to one or more fixed portions.
- the cover can be formed from two pieces, having a rear and a forward element, each having at least one mutually corresponding guide element, which co-operate to enable the forward element to be guided when it is retracted.
- Guide elements in the form of grooves and corresponding protrusions work well. In particular those having a rectangular, circular or elliptical profile work well, since these enable the elements to be easily joined together and arranged in a mechanically stable way.
- the rear covering element includes at least one attaching element which serves to fixedly attach the rear element to an injection device.
- Locking elements which can be non-detachably or detachably locked into recesses or protrusions on an injection device may be used. This allows the needle covering device to be pre-assembled and then attached to an injection device as a module. Alternatively, a needle covering device which is variable in length within itself could also be formed as expansion bellows.
- the rear and forward portions of a two-piece cover can each include at least one extended section having a mounting or receptacle for holding a restoring element.
- the restoring element in particular a spring, can be supported in a positionally and dimensionally stable way in the extended section.
- the needle covering device includes at least one latching means, to prevent the cover from retracting (or advancing in some cases from either extreme position or any intermediate position, if the latching means is in its latching position. In this way, the cover can effectively be prevented from being inadvertently retracted. Latching has also proven to be advantageous in the retracted position of the cover, since the cover then no longer has to be held back manually to replace the fluid product reservoir. Rather the user has both hands free to handle the reservoir.
- the mounting for the restoring element is arranged outside the center of the needle covering device, when seen in cross-section.
- a restoring force which acts substantially at the center of the injection device can be realized, even when the needle covering device is arranged laterally on the injection device.
- the injection device therefore needs merely to be placed substantially perpendicular on the tissue and pressed down against the restoring force of the restoring element. Since the restoring force acts substantially in the center, the danger of the injection needle or the injection device tipping or bending is effectively reduced.
- the cover may be formed at least partially from a transparent material, such that the level of the fluid product reservoir and/or the state of the injection needle can be viewed.
- the forward end of the cover is opaque, such that at least the forward end of the injection needle is not visible, which otherwise could intimidate the user.
- the needle covering device can be laterally attached to a casing of an injection device.
- receptacles for accommodating attaching elements may be provided in a forward part of the casing of the injection device, in order to securely attach the non-moving section of the cover to the casing of the injection device.
- At least one longitudinal slit can also be provided in the upper part, to guide a protrusion provided on the longitudinally movable section of the cover.
- the needle covering device may also be used to limit the penetration depth of the injection needle into the tissue.
- a stopper can be provided on the injection device or in the needle covering device, for setting the penetration depth. This stopper can be adjustable. In this way, an injection device with even fewer components can be provided.
- a needle covering device includes a cover which may be connected to the casing of the injection device and has at least one section which may be moved relative to the casing of the injection device, such that at least the forward end of the injection needle is covered by it in a forward protective position, and such that the forward end of the injection needle protrudes from a forward end of the cover in a retracted position of the cover, such that the non-covered art of the injection needle can be injected into the tissue.
- the needle covering device includes at least one guide element for guiding the cover or at least the movable section of the cover when it is moved between the forward protective position and the retracted position.
- a side wall of the cover includes an opening at least at its forward end, said opening enabling the fluid product reservoir and/or the injection needle to be replaced, in the retracted position of the cover, and at least hinders or as far as possible prevents them from being replaced, in the forward protective position of the cover.
- FIG. 1 is a perspective view of an injection device with a needle cover in a retracted position
- FIG. 2 is a perspective view of the injection device of FIG. 1 , with the needle cover in the forward protective position;
- FIG. 3 is a perspective view of the injection device of FIG. 1 , without the needle cover;
- FIG. 4 is a needle cover
- FIG. 5 is a perspective view of the injection device in accordance with the first embodiment, in which the arrangement of the restoring element is shown;
- FIG. 6 is a perspective view of an injection device with a needle cover in a retracted position
- FIG. 7 illustrates the injection device of FIG. 6 , with the needle cover in the forward protective position
- FIG. 8 illustrates the injection device of FIG. 6 , without the needle cover
- FIG. 9 is a perspective view of a needle cover in accordance with a second embodiment of the present invention.
- FIG. 10 illustrates the rear element of the needle cover of FIG. 9 ;
- FIG. 11 illustrates the forward element of the needle cover of FIG. 9 .
- FIG. 1 is a perspective view of an injection device 1 .
- the injection device 1 has a needle cover 12 illustrated in a retracted position.
- the injection device 1 includes a casing including a forward part 2 , a rear part 3 , and a needle cover 12 connected to the forward part 2 .
- the injection device 1 also has a dosing wheel 6 for setting the fluid product dosage and an activating button 9 for injecting the fluid product.
- An electronic system can be provided in the forward part 2 , for controlling all the processes of the injection device.
- An ampoule 10 is laterally supported on the forward part 2 .
- a recess formed by chamfers 18 and an inner side 17 can be provided in the forward part 2 , the recess preferably being adapted to the shape of the ampoule 10 .
- a rear end of the ampoule 10 is screwed into the thread 22 .
- the recess 23 which a latching element can latch into, serves to position the ampoule.
- a dosing means and a counter and display means may be provided, for example, in the opening 5 of the forward part 2 or on the rear part 3 .
- the forward part 2 (or any portion of non-moving casing portions) can be sealed against the environment. Since the reservoir or ampoule 10 is laterally attached to the casing of the injection device and the forward element 14 of the needle cover 12 can be moved, the reservoir or ampoule 10 can be replaced without the forward part 2 or the other non-movable casing portions having to be opened.
- the needle cover 12 is laterally attached to the forward part 2 .
- the needle cover 12 is designed in two pieces and includes a positionally stable (i.e., non-moving when attached to the injection device) rear element 13 connected to the forward part 2 .
- Cover 12 also includes a forward element 14 that is longitudinally movable relative to the rear element 13 , of which only the forward section 14 a is visible in FIG. 1 .
- the needle cover 12 can also be formed as one or a number of pieces. Where the needle cover 12 is formed as one piece, it is appropriately guided and held in guide elements of the forward part 2 of the casing.
- the forward element 14 can be longitudinally telescoped relative to the rear element 13 though it does not matter which of the two elements surrounds the other in the retracted position.
- the forward element 14 is retracted into the rear element 13 against the restoring force of a restoring element (described below) until an appropriate penetration depth is reached.
- This depth can be predetermined (or maximized) by the forward end of the ampoule 10 , where the injection needle (not shown) is inserted into the opening 11 .
- a stopper (not shown) is provided either in the casing of the injection device or in the needle cover 12 , to adjustably predetermine the maximum retracted position of the forward element 14 .
- the forward end of the ampoule 10 protrudes beyond the forward end 4 of the forward part 2 , such that the ampoule 10 is easily accessible for removal.
- the forward end of the ampoule 10 can instead end flush with the forward end 4 or the forward end 4 can protrude beyond the forward end of the ampoule 10 . If the forward edge 15 of the forward element 14 can be retracted back beyond the forward end of the ampoule 10 (towards the rear element 13 ), for example, by at least the width of a finger, such that the forward section of the ampoule 10 is easily accessible for handling, the replacement of ampoule 10 becomes easier.
- a guiding groove 16 is formed in each of the two side walls 37 for guiding the forward element 14 .
- the guiding groove 16 runs substantially in a straight line, and the grooves extend as far as the forward end of the forward element 14 , but can also be limited by a collar at the rear end of the forward element 14 , in order to limit the forward extreme position of the forward element 14 . In this way, the forward element 14 and rear element 13 can be joined together before the needle cover 12 is attached to the forward part 2 .
- the guiding protrusion 24 meshes with the guiding groove 16 and has a profile that is adapted to the profile of the guiding groove 16 .
- extended sections 32 are formed on the longitudinal sides of the side walls 37 , the guiding groove 16 being recessed in said sections.
- FIG. 4 also shows a perspective view of the needle cover 12 from the inside.
- the forward element 14 includes a section 14 b which may be transparent so that the level of the ampoule and also the state of the injection needle can easily be appraised from the outside.
- a protrusion 25 is provided on the longitudinal side of a side wall 37 .
- the protrusion interconnects with the longitudinal slit 20 shown in FIG. 3 and is guided in the slit 20 when the forward element 14 is retracted.
- the forward extreme position of the forward element 14 can be defined by the upper area of the protrusion 25 .
- the guiding protrusion 24 is inserted into the guiding groove 16 .
- the forward extreme position of the forward element 14 can be limited at the rear end of the guiding groove 16 by a heel (not shown).
- the elongated side walls 37 limit the opening 35 provided in the needle cover 12 .
- the opening 35 extends substantially along the entire length of at least the longitudinally movable section of the needle cover 12 , i.e., substantially along the entire length of at least the forward element 14 .
- the non-moving rear element 13 attached to the injection device 1 likewise includes a lateral opening 35 .
- the non-moving element 13 can also be formed by the casing or a part of the casing of the injection device, in which case no lateral opening 35 needs to be provided.
- the width of the opening 35 is selected to ensure that the ampoule provided inside the needle cover 12 is appropriately supported and covered and that the injection needle and/or the ampoule is sufficiently easy to handle when the needle cover 12 is retracted.
- the lateral opening 35 extends substantially along the entire width of the needle cover 12 , such that the opening angle of the opening 35 is substantially 90°.
- the needle cover 12 is placed on the inner side 17 of the forward part 2 such that the protrusions 25 interconnect with the longitudinal slit 20 and the attaching elements 27 interconnect with the recesses 21 a , 21 b provided in the lateral edge of the inner side 17 .
- the attaching elements 27 are preferably locking elements which lock into the recesses 21 .
- Other appropriate detachable or non-detachable attaching techniques may be utilized.
- the forward part 2 of the casing and the shell-shaped needle covering device forms a closed or substantially closed hollow cylindrical space. That is, the forward part 2 of the casing closes the opening 35 in the needle covering device.
- each protrusion 25 comprises a trunnion 26 on which a spring 28 is placed.
- the spring 28 shown in FIG. 5 , serves as the restoring element for restoring the forward element 14 .
- the other end of the spring 28 is placed on the trunnion 29 arranged on the base of the forward part 2 .
- the springs 28 are slipped onto the trunnions 29 .
- the springs are appropriately pressed together, and the needle cover 12 is placed on the inner side 17 of the forward part 2 .
- the protrusions 25 protrude into the longitudinal slit 20 .
- the spring 28 is then relaxed and is slipped onto the trunnion 26 .
- a longitudinal guide e.g., a slip on sleeve, can be provided in the inner side of the forward part 2 .
- An electronic control system can be provided to control the injection device 1 , and can be inserted into the forward part 2 through the opening 5 or can be situated in the rear part 3 .
- the injection device 1 is operated as follows.
- the forward edge 15 of the needle cover 12 is placed on the tissue.
- the semi-circular forward edge 15 and the side walls 37 ensure that the injection device 1 is placed substantially perpendicular to the tissue and that the injection needle is injected substantially perpendicular into the tissue. This takes place in the forward protective position of the needle cover 12 as shown in FIG. 2 .
- latching means (not shown) secure the forward element 14 of the needle cover 12 , such that it cannot be retracted into the rear element 13 .
- the forward element 14 can be retracted until a rear extreme position is reached.
- the rear extreme position can be set by a stopper (not shown) that can be provided in the casing of the injection device 1 or in the needle cover 12 .
- a stopper (not shown) that can be provided in the casing of the injection device 1 or in the needle cover 12 .
- an activating button 9 or other switch
- the fluid product is injected into the tissue mechanically or power-assisted, wherein a piston provided in the ampoule 10 pushes fluid product through an injection needle (not shown) into the tissue.
- the dose administered can be predetermined by the dosing wheel 6 or by an electronic control system.
- the injection needle is extracted by withdrawing the injection device 1 from the tissue. Due to the restoring force of the spring 28 , this also retracts the forward element 14 of the needle cover 12 until the forward protective position is reached again. Once the latching means are latched, the position of the forward element 14 is again kept from moving so that the forward element 14 cannot be inadvertently or unintentionally retracted.
- the forward element 14 can be retracted beyond the rear extreme position predetermined by the stopper, so that the forward edge of the ampoule 10 can be handled.
- latching means In order to secure the forward protective position of the forward element 14 , latching means (not shown) are provided which in a first latching position prevent the forward element 14 from being retracted into the rear element 13 . When the latching means are in a released position they allow the forward element 14 to be retracted. Locking sliders, mechanical switches, or anti-twist devices may optionally be integrated into the guiding groove 16 or electromagnetic switches and the like can be provided.
- FIGS. 6 to 11 illustrate another embodiment of a needle covering device.
- FIG. 9 illustrates the forward element 14 and the rear element 13 .
- the guiding groove 30 does not extend along the entire length of the forward element 14 . Rather, a guiding stopper 34 is provided near the forward edge 15 where the guiding groove 30 terminates.
- the guiding stopper 34 establishes the extreme forward position of the forward element 14 .
- the guiding protrusion 31 interconnects with the guiding groove 30 .
- the guiding protrusion 15 formed as a relatively short projection and is situated near the forward edge of the rear element 13 .
- the rear element 13 includes two extended sections 32 on a lower edge.
- the extended sections abut the extended sections 32 of the forward element 14 to establish the rear extreme position of the forward element 14 .
- recesses 33 are provided in the extended sections 32 of each of the rear element 13 and the forward element 14 .
- the recesses serve to accommodate the spring 28 shown in FIG. 9 , which serves as the restoring element.
- a longitudinal guide can be provided to stabilize the restoring element.
- the longitudinal guide can be a sleeve which can be slid onto the restoring element 28 .
- the needle cover 12 is placed on the inner side 17 of the forward part 2 , as shown in FIG. 8 .
- the attaching or locking elements 27 interconnect with the recesses 21 a , 21 b provided on the lateral edge 19 of the inner side. Longitudinal slits do not need to be provided on the inner side 17 of the forward part 2 .
- the restoring springs 28 are not arranged in the forward part 2 of the injection device, but rather integrated into the needle covering device 12 .
- the mountings for the restoring springs 28 are arranged outside the center of the needle cover 12 .
- the present invention is not limited to such injection devices. Rather, the principle of laterally arranging a needle cover on an injection device wherein the needle cover can be applied to any shapes of fluid product reservoirs and any designs of injection devices.
- the needles can be 30-guage or 31-guage needles.
- a casing jacket may jointly encase the reservoir and the injection needle, and the non-movable casing portions in other embodiments.
- This casing jacket maybe movable in the manner of the needle cover described above, that is in the axial direction of the reservoir and/or the injection device.
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Abstract
The present invention is an injection device for injecting a fluid product from a reservoir includes a casing having at least two casing portions. The device also includes a mounting for the reservoir such as an ampoule containing the fluid product to be administered, wherein one casing portion at least partially surrounds the reservoir. An activating element for triggering fluid product administering is provided. The at least one casing portion surrounding the reservoir is movable relative to the other casing portion or parts, such that by moving the movable casing portion, the reservoir and/or an injection needle connected to the same is accessible from the outer side of the casing, in order to be replaced.
Description
- This application is a Continuation of U.S. patent application Ser. No. 10/225,571, filed on Aug. 21, 2002, which claims the priority of German patent application No. DE 101 41 039.5, filed on Aug. 22, 2001.
- The present invention relates to an injection device for injecting a fluid product that includes a needle covering device.
- Injection devices are used for administering a fluid product such as a medicine, an infusion solution, or a contrast agent from a reservoir, e.g., an ampoule. An injection needle or cannula is used to inject the fluid product into human or animal tissue. When the fluid product in the reservoir is depleted, the reservoir should be able to be quickly and easily replaced.
- For safety reasons and to prevent the fluid product from being unintentionally administered, the injection needle may be covered when not in use. However, the injection needle should be quickly and reliably accessible when the fluid product is to be administered. Moreover, since many users of injection devices have a psychological aversion (so-called “needle phobia”) to injection needles, it may be beneficial to obscure from view at least a portion of the injection needle.
- Slip-on covering caps which can be removed or pushed together for covering needles are disclosed in WO 96/11026. Alternatively, retractable needle covering devices cover at least the end of the injection needle. The cover is retracted so that the injection needle can be injected into the tissue.
- Such needle covering devices are disclosed in U.S. Pat. No. 4,804,372 and DE 40 13 769 A1. These injection devices are comparatively long. Thus, when attempting to place the injection needle at an angle to the surface of the tissue, the injection needle may bend and the needle and cover may draw relatively near, to the point where the injection needle jams in the needle cover. Moreover, replacing the fluid product reservoir is complicated, since the needle covering device has to be removed before the reservoir is replaced. The covering device must then be replaced afterwards on the new reservoir, which in the case of complicated injection devices, for example those comprising electronics, can lead to significant time loss and sources of danger.
- In one embodiment, the present invention is an injection device wherein a fluid product reservoir, e.g., an ampoule, can be replaced quickly and easily. Moreover, the injection device is reliable and easy to handle. A needle covering device for such an injection device is also to be provided.
- In one embodiment, the injection device includes a casing having at least two casing portions; a mounting for the reservoir and an activating element for triggering fluid product administering. One casing portion at least partially surrounds the reservoir and can be moved relative to the reservoir (or to the other casing portions). Thus, by moving the movable casing portion, the reservoir and/or an injection needle connected to the reservoir is accessible from the outer side of the casing and can be replaced.
- Thus, the reservoir, e.g., an ampoule, can be changed without having to open the actual casing of the injection device. In this respect, the movable casing portion may be formed comparatively small in comparison to the non-movable casing portions; that is, adapted to the size of the reservoir to be replaced. Thus, the actual casing or main casing of the injection device can contain the elements necessary for it to operate. For example, complex mechanism such as a counter and display means (including any required circuitry) can be disposed within the casing. Additionally, such parts can include a dosing means, an activating means and similar elements that are not altered in their positions relative to each other when a reservoir is replaced. Thus, their settings relative to each other also do not have to be reset when the reservoir is replaced. Moreover, dirt and moisture are prevented or at least hindered in reaching sensitive parts. Thus, the injection device can be operated more reliably and with less maintenance. Furthermore, the more sensitive parts of the injection device can be sealed against dirt, dust and moisture and other environmental influences.
- In one embodiment, the movable casing portion can be moved in an axial direction (relative to the reservoir) between a forward position and a retracted position. Replacement of the reservoir and/or an injection needle occurs when the moveable casing is in the retracted position and prevented (or at least hindered) in the forward position. The movable casing portion may also be movable in other directions relative to the reservoir. For example, the moveable portion may move perpendicular to the axial direction, i.e., away from the main casing of the injection device, in order to provide a suitable space such that the reservoir and/or the injection needle can be grasped from the outer side of the casing for replacement.
- In one embodiment an injection device includes a casing having at least two casing portions, a mounting for the reservoir and an activating element for triggering fluid product administering. One casing portion at least partially surrounds the reservoir and can be moved relative to the reservoir or to the other casing portions of the injection device, such that by moving the movable casing portion, the reservoir and/or an injection needle connected to the same is accessible from the outer side of the casing, in order to be replaced.
- For injection into tissue, the needle protrudes beyond a forward end of the injection device. The position of the movable casing portion is adapted to the position and length of the injection needle. Thus, when the casing is in a forward protective position, the forward end of the movable casing portion protrudes beyond the forward end of the casing of the injection device and the needle. However, in order to enable the fluid product reservoir to be easily replaced, the movable casing portion can be moved back beyond the forward end of the reservoir, where the injection needle is conventionally connected to the reservoir, such that the forward part of the reservoir can be handled. The needle covering device can be retracted back beyond the forward end of the reservoir by a distance that approximates the width of an average finger, so that the reservoir can at least be grasped by two fingers for removal.
- The casing portion can include a forward part and a forward end of the reservoir can protrude from the forward end of the forward part and the movable casing portion can be movable back at least as far as the forward end of the forward part, such that the forward end of the reservoir can easily be grasped from the outer side of the casing, i.e., from its facing side, in order to be replaced.
- In one embodiment, the movable casing portion is simultaneously formed as a needle cover for the injection needle and serves to protect against the injection needle being unintentionally injected into a tissue or unintentionally touched.
- In one embodiment, the needle cover includes at least one section which can be moved relative to the casing, or is formed by such a section, such that at least a forward end of the injection needle is covered by the cover in a forward protective position of the cover, and protrudes from a forward end of the cover in a retracted position of the cover. Thus, by placing the injection device together with the needle cover on the tissue and by pressing the injection device as a whole, the injection needle can be injected into the tissue without the user seeing the injection needle before it injects.
- In one embodiment, the cover is substantially tube-shaped and has a circular, elliptical, rectangular or polyhedral cross-section. Due to a lateral opening in the cover, it can be laterally attached to the injection device, at least partially surrounding the fluid product reservoir. This type of arrangement enables a range of advantages. For example, the fluid product reservoir can be attached laterally to the injection device, such that the conventionally used elongated reservoirs (e.g., ampoules) can be practically supported along their entire length on a side wall of the casing. Thus, the reservoir attachment is mechanically stable, especially with regard to twisting and bending forces. Due to the lateral arrangement of the reservoir, injection devices of shorter lengths can be provided, given fluid product reservoirs of comparable length, such that overall weaker leverage forces are acting on the injection needle and/or the needle covering device. The somewhat larger width of such an injection device is not disruptive. Rather a large width is often advantageous, since otherwise relatively narrow, pen-shaped injection devices can then be formed such that they are easily grasped, for example fitting into a patient's fist.
- When the fluid reservoir is laterally attached to an injection device, the reservoir together with the injection needle is more accessible and can be more easily replaced and monitored. For example, the fluid product reservoir can easily be grasped for replacement, once the cover has been retracted. For example, the reservoir can be grasped and rotated and thus screwed in or out. The injection needle is nonetheless reliably and mechanically covered in the forward protective position of the needle cover, since when attached laterally to a casing of an injection device, the needle cover is laterally supported substantially along its entire length.
- In embodiments using, e.g., syringes or ampoules having a circular cross-section, the cover has a semi-circular cross section with two side wall sections running substantially in a straight line, as seen in cross-section. The side wall sections laterally define an opening in the cover. The diameter of the semi-circular section is adapted to the diameter of the fluid product reservoir. The semi-circular section enables a structurally stable and visually appealing cover. The length of the side wall sections is selected such that, when the needle covering device is arranged laterally on an injection device, the side walls of the fluid product reservoir are supported by a side wall of the injection device. In this way, the fluid product reservoir is held in a structurally stable way. The opening angle of the opening can also be selected such that the cover encompasses the fluid product reservoir by more than 270°, so that a syringe or ampoule can be supported in a cavity arranged in a side wall of the injection device.
- In one embodiment, the moveable portion of the cover is preferably returned to the forward protective position by a restoring element, such that the injection needle is always covered in its resting state. At least one protrusion can be provided on the cover to hold the restoring element. The protrusion meshes with a longitudinal slit of the injection device and is guided in it when retracted. The protrusion includes a trunnion or a comparable mounting for the restoring element. The other end of the restoring element is supported in the casing of the injection device. Thus, when the cover is retracted, the restoring element is compressed and the compression force of the spring thus increased. This feature enables the injection device to be formed in a particularly space-saving way.
- Alternatively, in one embodiment, the cover can be formed as one piece, wherein the cover interconnects with at least one guide in the casing of the injection device and can be moved, that is guided, relative to the casing.
- In one embodiment, the cover is designed in at least two pieces, and includes one or more covering elements that can be longitudinally telescoped relative to one or more fixed portions. The cover can be formed from two pieces, having a rear and a forward element, each having at least one mutually corresponding guide element, which co-operate to enable the forward element to be guided when it is retracted. Guide elements in the form of grooves and corresponding protrusions work well. In particular those having a rectangular, circular or elliptical profile work well, since these enable the elements to be easily joined together and arranged in a mechanically stable way.
- The rear covering element includes at least one attaching element which serves to fixedly attach the rear element to an injection device. Locking elements which can be non-detachably or detachably locked into recesses or protrusions on an injection device may be used. This allows the needle covering device to be pre-assembled and then attached to an injection device as a module. Alternatively, a needle covering device which is variable in length within itself could also be formed as expansion bellows.
- In one embodiment, the rear and forward portions of a two-piece cover can each include at least one extended section having a mounting or receptacle for holding a restoring element. The restoring element, in particular a spring, can be supported in a positionally and dimensionally stable way in the extended section.
- In one embodiment, the needle covering device includes at least one latching means, to prevent the cover from retracting (or advancing in some cases from either extreme position or any intermediate position, if the latching means is in its latching position. In this way, the cover can effectively be prevented from being inadvertently retracted. Latching has also proven to be advantageous in the retracted position of the cover, since the cover then no longer has to be held back manually to replace the fluid product reservoir. Rather the user has both hands free to handle the reservoir.
- In one embodiment, the mounting for the restoring element is arranged outside the center of the needle covering device, when seen in cross-section. In this way, a restoring force which acts substantially at the center of the injection device can be realized, even when the needle covering device is arranged laterally on the injection device. The injection device therefore needs merely to be placed substantially perpendicular on the tissue and pressed down against the restoring force of the restoring element. Since the restoring force acts substantially in the center, the danger of the injection needle or the injection device tipping or bending is effectively reduced.
- The cover may be formed at least partially from a transparent material, such that the level of the fluid product reservoir and/or the state of the injection needle can be viewed. In one embodiment, the forward end of the cover is opaque, such that at least the forward end of the injection needle is not visible, which otherwise could intimidate the user.
- The needle covering device can be laterally attached to a casing of an injection device.
- When the cover of the injection needle includes two or more pieces, receptacles for accommodating attaching elements may be provided in a forward part of the casing of the injection device, in order to securely attach the non-moving section of the cover to the casing of the injection device. At least one longitudinal slit can also be provided in the upper part, to guide a protrusion provided on the longitudinally movable section of the cover.
- The needle covering device may also be used to limit the penetration depth of the injection needle into the tissue. To this end, a stopper can be provided on the injection device or in the needle covering device, for setting the penetration depth. This stopper can be adjustable. In this way, an injection device with even fewer components can be provided.
- In one embodiment, a needle covering device includes a cover which may be connected to the casing of the injection device and has at least one section which may be moved relative to the casing of the injection device, such that at least the forward end of the injection needle is covered by it in a forward protective position, and such that the forward end of the injection needle protrudes from a forward end of the cover in a retracted position of the cover, such that the non-covered art of the injection needle can be injected into the tissue. Furthermore, the needle covering device includes at least one guide element for guiding the cover or at least the movable section of the cover when it is moved between the forward protective position and the retracted position. A side wall of the cover includes an opening at least at its forward end, said opening enabling the fluid product reservoir and/or the injection needle to be replaced, in the retracted position of the cover, and at least hinders or as far as possible prevents them from being replaced, in the forward protective position of the cover.
-
FIG. 1 is a perspective view of an injection device with a needle cover in a retracted position; -
FIG. 2 is a perspective view of the injection device ofFIG. 1 , with the needle cover in the forward protective position; -
FIG. 3 is a perspective view of the injection device ofFIG. 1 , without the needle cover; -
FIG. 4 is a needle cover; -
FIG. 5 is a perspective view of the injection device in accordance with the first embodiment, in which the arrangement of the restoring element is shown; -
FIG. 6 is a perspective view of an injection device with a needle cover in a retracted position; -
FIG. 7 illustrates the injection device ofFIG. 6 , with the needle cover in the forward protective position; -
FIG. 8 illustrates the injection device ofFIG. 6 , without the needle cover; -
FIG. 9 is a perspective view of a needle cover in accordance with a second embodiment of the present invention; -
FIG. 10 illustrates the rear element of the needle cover ofFIG. 9 ; and -
FIG. 11 illustrates the forward element of the needle cover ofFIG. 9 . - In the figures, identical reference numerals indicate the same or similar elements.
-
FIG. 1 is a perspective view of aninjection device 1. Theinjection device 1 has aneedle cover 12 illustrated in a retracted position. Theinjection device 1 includes a casing including aforward part 2, arear part 3, and aneedle cover 12 connected to theforward part 2. Theinjection device 1 also has adosing wheel 6 for setting the fluid product dosage and an activatingbutton 9 for injecting the fluid product. An electronic system can be provided in theforward part 2, for controlling all the processes of the injection device. Anampoule 10 is laterally supported on theforward part 2. - As illustrated in
FIG. 3 , a recess formed bychamfers 18 and aninner side 17 can be provided in theforward part 2, the recess preferably being adapted to the shape of theampoule 10. A rear end of theampoule 10 is screwed into thethread 22. Therecess 23, which a latching element can latch into, serves to position the ampoule. - Other operational elements can be accommodated in the
forward part 2, in particular a dosing means and a counter and display means, may be provided, for example, in theopening 5 of theforward part 2 or on therear part 3. In order to sufficiently protect these elements from the environment, in particular from dirt and moisture, the forward part 2 (or any portion of non-moving casing portions) can be sealed against the environment. Since the reservoir orampoule 10 is laterally attached to the casing of the injection device and theforward element 14 of theneedle cover 12 can be moved, the reservoir orampoule 10 can be replaced without theforward part 2 or the other non-movable casing portions having to be opened. - As illustrated in
FIG. 1 , theneedle cover 12 is laterally attached to theforward part 2. Theneedle cover 12 is designed in two pieces and includes a positionally stable (i.e., non-moving when attached to the injection device)rear element 13 connected to theforward part 2.Cover 12 also includes aforward element 14 that is longitudinally movable relative to therear element 13, of which only theforward section 14 a is visible inFIG. 1 . Alternatively, theneedle cover 12 can also be formed as one or a number of pieces. Where theneedle cover 12 is formed as one piece, it is appropriately guided and held in guide elements of theforward part 2 of the casing. - With reference to
FIGS. 1 and 2 , theforward element 14 can be longitudinally telescoped relative to therear element 13 though it does not matter which of the two elements surrounds the other in the retracted position. To inject the fluid product, theforward element 14 is retracted into therear element 13 against the restoring force of a restoring element (described below) until an appropriate penetration depth is reached. This depth can be predetermined (or maximized) by the forward end of theampoule 10, where the injection needle (not shown) is inserted into the opening 11. Alternatively, a stopper (not shown) is provided either in the casing of the injection device or in theneedle cover 12, to adjustably predetermine the maximum retracted position of theforward element 14. - As shown in
FIG. 1 , the forward end of theampoule 10 protrudes beyond theforward end 4 of theforward part 2, such that theampoule 10 is easily accessible for removal. - The forward end of the
ampoule 10 can instead end flush with theforward end 4 or theforward end 4 can protrude beyond the forward end of theampoule 10. If theforward edge 15 of theforward element 14 can be retracted back beyond the forward end of the ampoule 10 (towards the rear element 13), for example, by at least the width of a finger, such that the forward section of theampoule 10 is easily accessible for handling, the replacement ofampoule 10 becomes easier. - As illustrated in
FIG. 2 , a guidinggroove 16 is formed in each of the twoside walls 37 for guiding theforward element 14. The guidinggroove 16 runs substantially in a straight line, and the grooves extend as far as the forward end of theforward element 14, but can also be limited by a collar at the rear end of theforward element 14, in order to limit the forward extreme position of theforward element 14. In this way, theforward element 14 andrear element 13 can be joined together before theneedle cover 12 is attached to theforward part 2. - As illustrated in
FIG. 4 , the guidingprotrusion 24 meshes with the guidinggroove 16 and has a profile that is adapted to the profile of the guidinggroove 16. In order to form the guidinggroove 16,extended sections 32 are formed on the longitudinal sides of theside walls 37, the guidinggroove 16 being recessed in said sections. -
FIG. 4 also shows a perspective view of theneedle cover 12 from the inside. Alongside thesection 14 a (which may be opaque to limit viewing of the needle), theforward element 14 includes asection 14 b which may be transparent so that the level of the ampoule and also the state of the injection needle can easily be appraised from the outside. - A
protrusion 25 is provided on the longitudinal side of aside wall 37. The protrusion interconnects with thelongitudinal slit 20 shown inFIG. 3 and is guided in theslit 20 when theforward element 14 is retracted. The forward extreme position of theforward element 14 can be defined by the upper area of theprotrusion 25. To join theneedle cover 12 together, the guidingprotrusion 24 is inserted into the guidinggroove 16. The forward extreme position of theforward element 14 can be limited at the rear end of the guidinggroove 16 by a heel (not shown). - As shown in
FIG. 4 , theelongated side walls 37 limit theopening 35 provided in theneedle cover 12. Theopening 35 extends substantially along the entire length of at least the longitudinally movable section of theneedle cover 12, i.e., substantially along the entire length of at least theforward element 14. The non-movingrear element 13 attached to theinjection device 1 likewise includes alateral opening 35. In alternative embodiments, however, thenon-moving element 13 can also be formed by the casing or a part of the casing of the injection device, in which case nolateral opening 35 needs to be provided. The width of theopening 35 is selected to ensure that the ampoule provided inside theneedle cover 12 is appropriately supported and covered and that the injection needle and/or the ampoule is sufficiently easy to handle when theneedle cover 12 is retracted. Thelateral opening 35 extends substantially along the entire width of theneedle cover 12, such that the opening angle of theopening 35 is substantially 90°. - In the pre-assembled state, the
needle cover 12 is placed on theinner side 17 of theforward part 2 such that theprotrusions 25 interconnect with thelongitudinal slit 20 and the attachingelements 27 interconnect with therecesses 21 a, 21 b provided in the lateral edge of theinner side 17. The attachingelements 27 are preferably locking elements which lock into the recesses 21. Other appropriate detachable or non-detachable attaching techniques may be utilized. Theforward part 2 of the casing and the shell-shaped needle covering device forms a closed or substantially closed hollow cylindrical space. That is, theforward part 2 of the casing closes theopening 35 in the needle covering device. - As shown in
FIG. 4 , eachprotrusion 25 comprises a trunnion 26 on which aspring 28 is placed. Thespring 28, shown inFIG. 5 , serves as the restoring element for restoring theforward element 14. The other end of thespring 28 is placed on thetrunnion 29 arranged on the base of theforward part 2. In order to assemble theneedle cover 12, thesprings 28 are slipped onto thetrunnions 29. The springs are appropriately pressed together, and theneedle cover 12 is placed on theinner side 17 of theforward part 2. Theprotrusions 25 protrude into thelongitudinal slit 20. Thespring 28 is then relaxed and is slipped onto the trunnion 26. For laterally guiding thespring 28, a longitudinal guide, e.g., a slip on sleeve, can be provided in the inner side of theforward part 2. - An electronic control system can be provided to control the
injection device 1, and can be inserted into theforward part 2 through theopening 5 or can be situated in therear part 3. Theinjection device 1 is operated as follows. Theforward edge 15 of theneedle cover 12 is placed on the tissue. The semi-circularforward edge 15 and theside walls 37 ensure that theinjection device 1 is placed substantially perpendicular to the tissue and that the injection needle is injected substantially perpendicular into the tissue. This takes place in the forward protective position of theneedle cover 12 as shown inFIG. 2 . In this position, latching means (not shown) secure theforward element 14 of theneedle cover 12, such that it cannot be retracted into therear element 13. Once the latching means are unlatched, theforward element 14 can be retracted until a rear extreme position is reached. The rear extreme position can be set by a stopper (not shown) that can be provided in the casing of theinjection device 1 or in theneedle cover 12. By pressing an activating button 9 (or other switch) the fluid product is injected into the tissue mechanically or power-assisted, wherein a piston provided in theampoule 10 pushes fluid product through an injection needle (not shown) into the tissue. The dose administered can be predetermined by thedosing wheel 6 or by an electronic control system. - Once the fluid product has been administered, the injection needle is extracted by withdrawing the
injection device 1 from the tissue. Due to the restoring force of thespring 28, this also retracts theforward element 14 of theneedle cover 12 until the forward protective position is reached again. Once the latching means are latched, the position of theforward element 14 is again kept from moving so that theforward element 14 cannot be inadvertently or unintentionally retracted. - In order to replace the
ampoule 10, theforward element 14 can be retracted beyond the rear extreme position predetermined by the stopper, so that the forward edge of theampoule 10 can be handled. - In order to secure the forward protective position of the
forward element 14, latching means (not shown) are provided which in a first latching position prevent theforward element 14 from being retracted into therear element 13. When the latching means are in a released position they allow theforward element 14 to be retracted. Locking sliders, mechanical switches, or anti-twist devices may optionally be integrated into the guidinggroove 16 or electromagnetic switches and the like can be provided. - FIGS. 6 to 11 illustrate another embodiment of a needle covering device.
FIG. 9 illustrates theforward element 14 and therear element 13. The guidinggroove 30 does not extend along the entire length of theforward element 14. Rather, a guidingstopper 34 is provided near theforward edge 15 where the guidinggroove 30 terminates. The guidingstopper 34 establishes the extreme forward position of theforward element 14. The guidingprotrusion 31 interconnects with the guidinggroove 30. The guidingprotrusion 15 formed as a relatively short projection and is situated near the forward edge of therear element 13. - The
rear element 13 includes twoextended sections 32 on a lower edge. The extended sections abut theextended sections 32 of theforward element 14 to establish the rear extreme position of theforward element 14. - As shown in
FIGS. 10 and 11 , recesses 33 are provided in theextended sections 32 of each of therear element 13 and theforward element 14. The recesses serve to accommodate thespring 28 shown inFIG. 9 , which serves as the restoring element. A longitudinal guide can be provided to stabilize the restoring element. The longitudinal guide can be a sleeve which can be slid onto the restoringelement 28. In order to join theneedle cover 12 together, the guidingprotrusion 31 is inserted into the guidinggroove 30, then the forward element is moved to the forward extreme position and then thespring 28 is inserted into therecesses 33. - The
needle cover 12 is placed on theinner side 17 of theforward part 2, as shown inFIG. 8 . The attaching or lockingelements 27 interconnect with therecesses 21 a, 21 b provided on thelateral edge 19 of the inner side. Longitudinal slits do not need to be provided on theinner side 17 of theforward part 2. The restoring springs 28 are not arranged in theforward part 2 of the injection device, but rather integrated into theneedle covering device 12. The mountings for the restoring springs 28 are arranged outside the center of theneedle cover 12. - Although the invention has been described above in connection with injection devices which inject the fluid product from an elongated ampoule, the present invention is not limited to such injection devices. Rather, the principle of laterally arranging a needle cover on an injection device wherein the needle cover can be applied to any shapes of fluid product reservoirs and any designs of injection devices. In some embodiments, the needles can be 30-guage or 31-guage needles.
- While the movable casing and/or the needle cover immediately surrounds the reservoir and/or injection needle in some embodiments, a casing jacket may jointly encase the reservoir and the injection needle, and the non-movable casing portions in other embodiments. This casing jacket maybe movable in the manner of the needle cover described above, that is in the axial direction of the reservoir and/or the injection device.
- Although the present invention has been described with reference to preferred embodiments, persons skilled in the art will recognize that changes may be made in form and detail without departing from the spirit and scope of the invention.
Claims (17)
1. An injection device for administering a fluid product from a reservoir, said injection device carrying a needle and comprising:
a mounting for the reservoir;
a needle cover comprising a cover portion at least partially surrounding the reservoir and moveable relative to another cover portion, such that by moving the movable cover portion, at least one of the reservoir and the needle becomes accessible, the movable cover portion movable between a forward position and a retracted position, such that accessing the reservoir and needle is possible in said retracted position and hindered in said forward position; and
an activating element for triggering fluid product administering.
2. The injection device of claim 1 , wherein said movable cover portion is moveable sufficiently to expose an end of the reservoir.
3. An injection device carrying a needle operably coupled to a reservoir and comprising:
a mounting for the reservoir;
a needle cover comprising at least two cover elements, wherein one cover element at least partially surrounds the reservoir, wherein said cover element at least partially surrounding the reservoir is moveable relative to the other cover element, such that by moving said movable cover element, at least one of the reservoir and the needle becomes accessible, said movable cover element movable between a forward position and a retracted position, such that accessing the reservoir and needle is possible in said retracted position, said movable cover element substantially covering the needle in the forward position.
4. The injection device as set forth in claim 3 , wherein the moveable cover element covers a forward end of the needle in the forward position, and the needle protrudes from a forward end of said moveable cover element in the retracted position.
5. The injection device as set forth in claim 4 , wherein a side wall of the moveable cover element defines an opening generally along one side and at the forward end thereof, whereby the reservoir can be accessed for replacement in the retracted position, and whereby the reservoir is substantially covered in the forward position.
6. The injection device as set forth in claim 5 , wherein said opening is formed in an area of a maximum cross-sectional diameter of the moveable cover element.
7. The injection device as set forth in claim 6 , wherein the moveable cover element is generally semi-circular and comprises two generally straight, parallel edges.
8. The injection device as set forth in claim 7 , further comprising a restoring element for urging the moveable cover element to the forward position.
9. The injection device as set forth in claim 8 , wherein the moveable cover element is longitudinally movable relative to the other cover element, wherein said other cover element includes a guiding element corresponding to a guiding element of the moveable cover element and co-operating with it, to enable the moveable cover element to be guided when it is moved.
10. A needle cover for a needle carried by an injection device, the needle cover comprising:
a first portion coupled to the injection device and a second portion moveable relative to the first portion and the injection device such that at least a forward end of the needle is covered in a forward protective position of the second portion and such that at least part of the needle protrudes from a forward end of the second portion in a retracted position; and
at least one guide element for guiding the second portion when it is moved, wherein a side wall of the second portion defines an opening at least at its forward end, said opening allowing access to at least one of the needle and a reservoir associated with the injection device.
11. The needle cover according to claim 10 , wherein the needle cover is laterally attached to the injection device generally along the opening.
12. An injection device comprising:
a housing;
a reservoir to which an injection needle can be coupled to deliver a fluid product; and
a needle cover comprising:
a rear part coupleable to the housing; and
a forward part moveably coupled to the rear part whereby, in an extended position of the forward part, the forward part and the rear part at least partially surround the reservoir and the injection needle and, in a retracted position of the forward part, at least one of the needle and the reservoir is accessible.
13. The injection device according to claim 12 , wherein the forward part is urged toward the extended position.
14. The injection device according to claim 12 , wherein the forward part telescopes with respect to the rear part.
15. The injection device according to claim 12 , wherein the needle cover is generally hemi-spherically shaped, having an open side defined by two generally straight, parallel edges, wherein, in the retracted position, the needle and reservoir are accessible via said open side.
16. The injection device according to claim 15 , wherein the needle cover provides access to the needle and reservoir, said access being from a direction generally transverse to the longitudinal axis of the needle.
17. An injection device comprising:
a mounting for a reservoir;
a needle cover comprising at least two cover parts; wherein one cover part at least partially surrounds said reservoir and is movable relative to said other cover part or parts, such that by moving said movable cover part, at least one of said reservoir or an injection needle connected to the reservoir is accessible from the side of said cover for replacement; and
an activating element for triggering an injection.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/677,681 US20070135771A1 (en) | 2001-08-22 | 2007-02-22 | Injection Device and Needle Covering Device |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10141039.5 | 2001-08-22 | ||
DE10141039A DE10141039A1 (en) | 2001-08-22 | 2001-08-22 | Injection device and needle cover device |
US10/225,571 US7182749B2 (en) | 2001-08-22 | 2002-08-21 | Injection device and needle covering device |
US11/677,681 US20070135771A1 (en) | 2001-08-22 | 2007-02-22 | Injection Device and Needle Covering Device |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/225,571 Continuation US7182749B2 (en) | 2001-08-22 | 2002-08-21 | Injection device and needle covering device |
Publications (1)
Publication Number | Publication Date |
---|---|
US20070135771A1 true US20070135771A1 (en) | 2007-06-14 |
Family
ID=7696183
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/225,571 Expired - Fee Related US7182749B2 (en) | 2001-08-22 | 2002-08-21 | Injection device and needle covering device |
US11/677,681 Abandoned US20070135771A1 (en) | 2001-08-22 | 2007-02-22 | Injection Device and Needle Covering Device |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/225,571 Expired - Fee Related US7182749B2 (en) | 2001-08-22 | 2002-08-21 | Injection device and needle covering device |
Country Status (2)
Country | Link |
---|---|
US (2) | US7182749B2 (en) |
DE (1) | DE10141039A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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US11660395B2 (en) | 2011-07-15 | 2023-05-30 | Sanofi-Aventis Deutschland Gmbh | Drug delivery device with electro-mechanic drive mechanism |
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DE10348185A1 (en) | 2003-10-16 | 2005-05-19 | Tecpharma Licensing Ag | Injection device for administering fluid product e.g. insulin, comprising injection needle and needle cover arranged on holder or on casing so that it can shift and generally surrounds injection needle in advanced position |
US7261559B2 (en) * | 2005-04-01 | 2007-08-28 | Ultradent Products, Inc. | Syringe delivery system for dispensing a dental composite or other highly viscous material |
US8545455B2 (en) * | 2009-03-30 | 2013-10-01 | University Of Rochester | Needle shield for injections |
USD755372S1 (en) * | 2013-12-12 | 2016-05-03 | Daicel Corporation | Needleless syringe |
US9694145B1 (en) | 2016-03-29 | 2017-07-04 | Joseph Onorato | Auto-injector systems and method for delivering cyst medication on demand |
GB2549964A (en) * | 2016-05-04 | 2017-11-08 | Owen Mumford Ltd | Medicament delivery devices |
USD893715S1 (en) | 2018-11-06 | 2020-08-18 | Joseph Onorato | Measurement guide for a cyst, lesion or skin disorder |
JP2023526764A (en) * | 2020-04-23 | 2023-06-23 | サノフイ | Injection device with electronic detector |
CN117180557A (en) * | 2021-03-19 | 2023-12-08 | 罗春梅 | Accurate intelligent needle type water light instrument for deep water supplementing and anti-aging |
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Also Published As
Publication number | Publication date |
---|---|
US7182749B2 (en) | 2007-02-27 |
DE10141039A1 (en) | 2003-03-13 |
US20030040716A1 (en) | 2003-02-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |