Auto-injector
First Claim
1. A front-end device of an auto-injector (A) for administering a dose of a liquid medicament, wherein the front-end device is adapted to receive a syringe with an injection needle and a barrel containing the dose of the medicament and comprisesa tubular outer sleeve,a compression connector for attaching the front-end device to a back-end device of the auto-injector (A), wherein the compression connector comprises:
- an annular mounting sleeve that is axially displaceable parallel to a longitudinal axis (X) between a locked position (L) and an unlocked position,a mounting sleeve spring biasing the mounting sleeve towards the locked position (L),at least one latch arm connected to the back-end device,wherein the at least one latch arm is deflectable in a radial direction, wherein the mounting sleeve in the locked position (L) is arranged to prevent a radial deflection of the at least one latch arm and wherein, in response to axially displacing the annular mounting sleeve to the unlocked position, the mounting sleeve in the unlocked position allows for the radial deflection of the latch arm, so as to allow the latch arm to be deflected on assembly or disassembly of the front-end device to the back-end device and to latch to or unlatch from the front-end device; and
wherein the compression connector is configured to transition from the locked position (L) to the unlocked position when the annular mounting sleeve is displaced with respect to the tubular outer sleeve against a biasing force of the mounting sleeve spring in a proximal direction to the locked position (L).
1 Assignment
0 Petitions
Accused Products
Abstract
The invention relates to a compression connection means for an auto-injector (A), wherein the compression connection means adapted to attach a front-end device of the auto-injector (A) to a back-end device of the auto-injector (A) comprises of an annular mounting sleeve that is axially displaceable parallel to a longitudinal axis (X) between a locked position (L) and an unlocked position, a mounting sleeve spring biasing the mounting sleeve towards a locked position (L), at least one latch arm connected to one of either the front-end device or the back-end device, wherein the latch arm is deflectable in a radial direction, wherein the mounting sleeve in the locked position (L) is arranged to prevent the radial deflection of the latch arm and wherein the mounting sleeve in the unlocked position allows for a radial deflection of the latch arm, so as to allow the latch arm to be deflected on assembly or disassembly of the front-end device to the back-end device and to latch to or unlatch from the other of the front-end device or the back-end device.
11 Citations
9 Claims
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1. A front-end device of an auto-injector (A) for administering a dose of a liquid medicament, wherein the front-end device is adapted to receive a syringe with an injection needle and a barrel containing the dose of the medicament and comprises
a tubular outer sleeve, a compression connector for attaching the front-end device to a back-end device of the auto-injector (A), wherein the compression connector comprises: -
an annular mounting sleeve that is axially displaceable parallel to a longitudinal axis (X) between a locked position (L) and an unlocked position, a mounting sleeve spring biasing the mounting sleeve towards the locked position (L), at least one latch arm connected to the back-end device, wherein the at least one latch arm is deflectable in a radial direction, wherein the mounting sleeve in the locked position (L) is arranged to prevent a radial deflection of the at least one latch arm and wherein, in response to axially displacing the annular mounting sleeve to the unlocked position, the mounting sleeve in the unlocked position allows for the radial deflection of the latch arm, so as to allow the latch arm to be deflected on assembly or disassembly of the front-end device to the back-end device and to latch to or unlatch from the front-end device; and wherein the compression connector is configured to transition from the locked position (L) to the unlocked position when the annular mounting sleeve is displaced with respect to the tubular outer sleeve against a biasing force of the mounting sleeve spring in a proximal direction to the locked position (L). - View Dependent Claims (2, 3)
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4. An auto-injector (A) for administering a dose of a liquid medicament, comprising:
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a front-end device; and a reusable back-end device comprising; a housing, a plunger connected to or adapted to engage a stopper providing a fluid tight seal for a distal end of the barrel, a motor for displacing the plunger connected to the stopper; and
a compression connector for attaching the front-end device to the back-end device, the compression connector comprising;an annular mounting sleeve that is axially displaceable parallel to a longitudinal axis (X) between a locked position (L) and an unlocked position, a mounting sleeve spring biasing the mounting sleeve towards the locked position (L), at least one latch arm connected to the back-end device, wherein the at least one latch arm is deflectable in a radial direction, wherein the mounting sleeve in the locked position (L) is arranged to prevent a radial deflection of the at least one latch arm and wherein, in response to axially displacing the annular mounting sleeve to the unlocked position, the mounting sleeve in the unlocked position allows for the radial deflection of the latch arm, so as to allow the latch arm to be deflected on assembly or disassembly of the front-end device to the back-end device and to latch to or unlatch from the front-end device; and wherein the compression connector is configured to transition from the locked position (L) to the unlocked position when the annular mounting sleeve is displaced with respect to a tubular outer sleeve against a biasing force of the mounting sleeve spring in a proximal direction to the locked position (L). - View Dependent Claims (5, 6, 7, 8, 9)
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Specification