NZ799581B2 - Auto-injector - Google Patents

Abstract

injection device includes a carrier (202), a needle (306), a gear (360) coupled to the carrier, a driver (320) coupled to the carrier, the gear, and the needle, the driver being slidable relative to the carrier between a retracted configuration and a deployed configuration, a shuttle (340) including a first rack (342) configured to engage the gear to drive rotation of the gear and configured to disengage the gear after driving rotation of the gear. Rotation of the gear moves the driver from the retracted configuration to the deployed configuration. The current invention allows for a simpler user or self injection device that is less user error-prone as less user input is required during an injection procedure.

Claims (20)

THE CLAIMS NG THE INVENTION ARE AS FOLLOWS:

1. An ion device, comprising: a carrier; a gear d to the carrier; a needle; a driver coupled to the carrier, the gear, and the , the driver being slidable relative to the carrier between a retracted configuration and a deployed configuration; and a e ing a first rack gear configured to engage the gear to drive rotation of the gear and configured to disengage the gear after driving rotation of the gear, wherein the rotation of the gear moves the driver from the retracted configuration to the deployed configuration.

2. The injection device of claim 1, wherein the shuttle is movable from a first position to a second position, and from the second position to a third position, and wherein: when the shuttle is in the first position, the driver is in the retracted configuration; when the shuttle is in the second position, the driver is in the deployed configuration; and when the shuttle is in the third position, the needle is retracted.

3. The injection device of any one of the preceding claims, wherein the first position and the third position are different.

4. The injection device of any one of claims 2-3, wherein the shuttle moves from the first position to the second position in a first direction along an axis, and moves further in the first direction along the axis from the second position to the third position.

5. The injection device of claim 4, wherein the shuttle is configured to move only in the first direction.

6. The injection device of any one of claims 4-5, further sing: a ent member coupled to the e and the carrier, wherein the resilient member causes the shuttle to move in the first direction.

7. The injection device of any one of claims 2-6, wherein movement of the shuttle from the first position to the second position drives rotation of the gear in a first ion to move the driver from the retracted uration to the deployed configuration, and wherein movement of the shuttle from the second position to the third position drives rotation of the gear in a second direction opposite the first direction to retract the driver.

8. The injection device of any one of the preceding claims, wherein the shuttle further includes a second rack gear configured to drive rotation of the gear in an opposite direction as the first rack gear.

9. The injection device of claim 8, wherein the second rack gear is substantially parallel to the first rack gear and longitudinally spaced apart from the first rack gear.

10. The injection device of any one of claims 8-9, wherein on of the gear in the opposite ion is configured to retract the driver.

11. The injection device of any one of claims 8-10, wherein the first rack gear and the second rack gear are ured to engage the gear asynchronously.

12. The ion device of any one of claims 9-11, further comprising: a stop configured to impede movement of the shuttle when the driver is in the deployed configuration.

13. The injection device of claim 12, wherein the stop is configured to move out of a path of the shuttle to retract the driver.

14. The injection device of any one of the preceding claims, wherein the driver includes a driver rack gear and rotation of the gear is configured to drive the driver rack gear to move the driver from the retracted configuration to the deployed configuration.

15. The injection device of any one of the preceding claims, wherein the shuttle is configured to move along a first axis, the driver is configured to move along a second axis, and the first axis and the second axis are dicular to one another.

16. The injection device of any one of claims 1-3, n the injection device further comprises a housing including an impediment, and wherein the gear includes a single set of teeth arranged at a m radius relative to a center of the gear.

17. The injection device of claim 16, wherein the carrier is positioned within the housing and is configured to move relative to the housing.

18. The injection device of claim 17, wherein movement of the carrier relative to the housing causes 1) the impediment to slide out of a path of the driver along a first axis, and 2) the driver to be slidable relative to the carrier along a second axis perpendicular to the first axis and between the retracted configuration and the deployed configuration.

19. The injection device of claim 18, wherein the single set of teeth engages the driver such that the rotation of the gear moves the driver from the retracted uration to the deployed configuration.

20. The injection device of claim 18, n the driver further comprises a protrusion including a hook, and wherein the impediment prevents movement of the driver by engaging the hook of the protrusion. SUBSTITUTE SHEET (RULE 26) SUBSTITUTE SHEET (RULE 26) SUBSTITUTE SHEET (RULE 26) SUBSTITUTE SHEET (RULE 26) atian “$355 ‘ E Tauch g Sensar SUBSTITUTE SHEET (RULE 26) ‘ESGZ SUBSTITUTE SHEET (RULE 26) SUBSTITUTE SHEET (RULE 26) SUBSTITUTE SHEET (RULE 26) SUBSTITUTE SHEET (RULE 26)