An injection device 110 is described having a housing 112 and a cap 130. The injection device 110 houses a syringe 114 having a needle which is sealed by a boot 118. The cap 130 is arranged so that the boot 118 can be connected to the cap 130 while exerting a minimal force on the syringe, but cannot
An injection device 110 is described having a housing 112 and a cap 130. The injection device 110 houses a syringe 114 having a needle which is sealed by a boot 118. The cap 130 is arranged so that the boot 118 can be connected to the cap 130 while exerting a minimal force on the syringe, but cannot be removed from the cap 130 without applying a significantly greater force to the syringe. The housing 112 and cap 130 are arranged so that upon removal of the cap 130 from the housing 112, the boot 118 is removed from the syringe 114.
대표청구항▼
1. A cap for an injection device, the cap comprising: a first part having a first end for receiving an injection device and a second end, the first part defining a first axis and having grip means for gripping a boot of a syringe, wherein the grip means is movable by a force from a first position to
1. A cap for an injection device, the cap comprising: a first part having a first end for receiving an injection device and a second end, the first part defining a first axis and having grip means for gripping a boot of a syringe, wherein the grip means is movable by a force from a first position to a second position and the grip means is capable of springing back from the second position to the first position, the second position being further from the first axis than the first position; anda second part having retention means for retaining the grip means, the retention means arranged such that movement of the retention means from a third position to a fourth position prevents the grip means from moving from the first position to the second position. 2. A cap according to claim 1, wherein the first part includes a pair of arms, each arm having a first end and a second end, wherein the grip means is formed at a first end of each arm, and the first ends of the pair of arms are closer to the first end of the first part than the second ends of the pair of arms. 3. A cap according to claim 2, wherein the grip means comprises a hooked end portion. 4. A cap according to claim 2, wherein each arm is formed from a segment of a cylinder. 5. A cap according to claim 4, wherein the pair of arms are arranged so that an axis of the cylinder from which each arm is formed is substantially parallel to the first axis when the grip means is in the first position. 6. A cap according to claim 2 wherein, when the grip means is in the first position, the first ends of the pair of arms are closer to the first axis than when the grip means is in the second position. 7. A cap according to claim 2 wherein the retention means comprises a ring shaped portion. 8. A cap according to claim 2 wherein the retention means comprises a ring shaped portion having an internal diameter which is less than a distance between the first ends of the pair of arms when the grip means is in the second position. 9. A cap according to claim 8 wherein when the retention means is positioned in the fourth position, the ring shaped portion surrounds the first ends of the pair of arms. 10. A cap according to claim 7, wherein the ring shaped portion includes one of a groove and a ridge formed on an inner surface thereof. 11. A cap according to claim 10, wherein the pair of arms of the first part have the other of the groove and the ridge formed on an external surface and proximal to the first end thereof. 12. A cap according to claim 7 wherein the second part further includes a pair of legs, wherein a first end of each of the pair of legs is connected to the ring shaped portion. 13. A cap according to claim 12 wherein each of the pair of legs has a foot at a second end thereof. 14. A cap according to claim 12 wherein the second end of the first part of the cap is provided with one or more apertures therethrough. 15. A cap according to claim 14, wherein when the retention means is in the third position, each leg extends through one of the apertures. 16. A cap according to claim 14 wherein when the retention means is in the fourth position, each of the feet is positioned within one of the apertures. 17. A cap according to claim 13, wherein the retention means can be moved from the third position to the fourth position by applying a force to the foot of each leg. 18. A cap according to claim 7 wherein the second part comprises a cylindrical member having the retention means at a first end thereof, and a foot at a second end thereof. 19. A cap according to claim 18 wherein the cylindrical member has a pair of opposing apertures therethrough, through which the pair of arms of the first part extend. 20. A cap according to claim 18 wherein the second end of the first part of the cap is provided with a central aperture therethrough. 21. A cap according to claim 20 wherein when the retention means is in the third position, the foot of the second part protrudes through the central aperture, and when the retention means is in the fourth position, the foot is positioned within the first part of the cap or flush with the second end of the first part of the cap. 22. A cap according to claim 1 wherein the second part of the cap is provided with a movable protrusion which can communicate with a corresponding ridge proximal to the second end of the first part of the cap. 23. An injection device comprising: a housing containing a syringe having a discharge nozzle and a boot that covers the discharge nozzle, wherein the boot extends from a first end of the housing through an exit aperture; anda cap according to claim 1. 24. An injection device according to claim 23, including a cap wherein the first part includes a pair of arms, each arm having a first end and a second end, wherein the grip means is formed at a first end of each arm, and the first ends of the pair of arms are closer to the first end of the first part than the second ends of the pair of arms, and wherein a diameter of the boot is more than a distance between the grip means at the first end of each arm when the grip means is in the first position. 25. A method of attaching a cap to a boot of a syringe comprising: providing a cap comprising: a first part having a first end for receiving an injection device and a second end, the first part defining a first axis and having grip means for gripping the boot of a syringe, anda second part having retention means for retaining the grip means, whereinthe grip means is arranged in a first position and the retention means is arranged in a third position;inserting a boot of a syringe into the cap so that the grip means moves from the first position to a second position, the second position being further from the first axis than the first position,inserting the boot of the syringe further into the cap so that the grip means moves from the second position to the first position, and the boot is gripped by the grip means; andmoving the retention means from the third position to a fourth position, thus preventing the grip means from moving from the first position to the second position, such that the boot cannot be removed from the cap. 26. The method of claim 25, wherein the first part includes a pair of arms, each arm having a first end and a second end, and the grip means is formed at a first end of each arm, and the step of inserting the boot into the cap comprises positioning the boot between the grip means at the first ends of each arm.
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