Safety device for a pre-filled syringe and injection device
First Claim
1. A safety device for a pre-filled syringe comprising:
- a hollow support body for mounting the pre-filled syringe therein, the pre-filled syringe comprising a hypodermic needle attached to a distal end of the pre-filled syringe,a hollow needle shield that is slidable relative to the support body, the needle shield and the support body being configured such that relative rotation of the support body and the needle shield is inhibited, anda guiding mechanism to guide movement of the needle shield relative to the support body, the guiding mechanism comprising;
a flexible arm,a guide pin extending from the flexible arm in a radial direction,a guide track, wherein the guide pin protrudes into the guide track, anda separating wall that extends into the guide track in a direction parallel to a central axis of the safety device,wherein, the guide pin is configured to move along the guide track to deflect the flexible arm in a lateral direction perpendicular to the central axis when the needle shield is slid relative to the support body,wherein the guide pin is movable within the guide track from a start position through an intermediate position to an end position such that a distal end of the needle of the pre-filled syringe is surrounded by the needle shield when the guide pin is in the start position and the end position, andwherein the flexible arm interacts with the separating wall to guide movement of the guide pin along the guide track.
1 Assignment
1 Petition
Accused Products
Abstract
According to the invention, a safety device for a pre-filled syringe comprises a hollow support body for mounting the pre-filled syringe therein, a hollow needle shield that is slidable relative to the support body and guiding means for guiding the movement of the needle shield relative to the support body. The guiding means comprise a flexible arm with a guide pin, a guide track and a separating wall. The guide pin extends from the flexible arm in a radial direction, and protrudes into the guide track. The separating wall extends into the guide track in a direction parallel to a central axis of the safety device. When the needle shield is slid relative to the support body the guide pin moves along the guide track to deflect the flexible arm in a lateral direction perpendicular to the central axis and the movement of the guide pin along the guide track is guided by the interplay of the flexible arm and the separating wall.
43 Citations
19 Claims
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1. A safety device for a pre-filled syringe comprising:
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a hollow support body for mounting the pre-filled syringe therein, the pre-filled syringe comprising a hypodermic needle attached to a distal end of the pre-filled syringe, a hollow needle shield that is slidable relative to the support body, the needle shield and the support body being configured such that relative rotation of the support body and the needle shield is inhibited, and a guiding mechanism to guide movement of the needle shield relative to the support body, the guiding mechanism comprising; a flexible arm, a guide pin extending from the flexible arm in a radial direction, a guide track, wherein the guide pin protrudes into the guide track, and a separating wall that extends into the guide track in a direction parallel to a central axis of the safety device, wherein, the guide pin is configured to move along the guide track to deflect the flexible arm in a lateral direction perpendicular to the central axis when the needle shield is slid relative to the support body, wherein the guide pin is movable within the guide track from a start position through an intermediate position to an end position such that a distal end of the needle of the pre-filled syringe is surrounded by the needle shield when the guide pin is in the start position and the end position, and wherein the flexible arm interacts with the separating wall to guide movement of the guide pin along the guide track. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An injection device comprising:
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a pre-filled syringe with a hypodermic needle attached to a distal end of the pre-filled syringe; and
a safety device comprising;a hollow support body for mounting the pre-filled syringe therein such that the hypodermic needle protrudes past a distal end of the support body, a hollow needle shield that is slidable relative to the support body, the needle shield and the support body being configured such that relative rotation of the support body and the needle shield is inhibited, and a guiding mechanism to guide movement of the needle shield relative to the support body, the guiding mechanism comprising; a flexible arm, a guide pin extending from the flexible arm in a radial direction, a guide track, wherein the guide pin protrudes into the guide track, and a separating wall that extends into the guide track in a direction parallel to a central axis of the safety device, wherein the guide pin is configured to move along the guide track to deflect the flexible arm in a lateral direction perpendicular to the central axis when the needle shield is slid relative to the support body, wherein the guide pin is movable within the guide track from a start position through an intermediate position to an end position such that a distal end of the needle of the pre-filled syringe is surrounded by the needle shield when the guide pin is in the start position and the end position, and wherein the flexible arm interacts with the separating wall to guide movement of the guide pin along the guide track. - View Dependent Claims (18, 19)
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Specification