Self-injection device

• US 10,357,610 B2
• Filed: 06/23/2017
• Issued: 07/23/2019
• Est. Priority Date: 12/16/2009
• Status: Active Grant

• Current Assignee: Becton, Dickinson & Co
• Original Assignee: Becton, Dickinson & Co
• Inventors: Sonderegger, Ralph
• Primary Examiner(s): Osinski, Bradley J
• Application Number:
  US15/631,975
• Publication Number:
  US 20170290983A1
• Time in Patent Office: 760 Days
• CPC Class Codes: A61M 2005/14506 mechanically driven, e.g. spring or clockwork
• CPC Class Codes: A61M 2005/1585 Needle inserters
• CPC Class Codes: A61M 2005/206 With automatic needle insertion
• CPC Class Codes: A61M 2005/3115 spring-assisted
• CPC Class Codes: A61M 2037/0023 Drug applicators using microneedles
• CPC Class Codes: A61M 2205/15 Detection of leaks
• CPC Class Codes: A61M 2205/581 by audible feedback
• CPC Class Codes: A61M 2205/582 by tactile feedback
• CPC Class Codes: A61M 37/0015 by using microneedles
• CPC Class Codes: A61M 5/14216 Reciprocating piston type
• CPC Class Codes: A61M 5/14244 adapted to be carried by the patient, e.g. portable on the body
• CPC Class Codes: A61M 5/14248 of the skin patch type
• CPC Class Codes: A61M 5/14586 pressurised by means of a flexible diaphragm
• CPC Class Codes: A61M 5/158 Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
• CPC Class Codes: A61M 5/2033 Spring-loaded one-shot injectors with or without automatic needle insertion multishot dosing syringes A61M5/31525, needle insertion only A61M5/3287
• CPC Class Codes: A61M 5/282 by compression of deformable ampoule or carpule wall
• CPC Class Codes: A61M 5/3157 Means providing feedback signals when administration is completed A61M5/20 takes precedence

Abstract

A device (100) for delivering a medicament into a patient'"'"'s body by injection into or through the patient'"'"'s skin, including: a main body having a bottom enclosure (104) that has a top surface including a button guide latch (268); a reservoir (160) disposed within the main body for containing the medicament; an injection needle (152) for penetrating the skin of the patient, the needle (152) having a lumen and communicating with the reservoir (160) when the device (100) is activated; a pressurizing system (140, 144) for pressurizing the reservoir (160) when the device (100) is activated; and an activator button (128) movably disposed on the main body and movable from a pre-activated position to an activated position. The activator button (128) includes an activation arm (228). When the activator button (128) moves from the pre-activated position to the activated position, an end of the activation arm (228) engages with the button guide latch (268) and prevents return movement of the activator button (128).

Claims

1. A drug delivery device comprising:

a body including a top enclosure and a bottom enclosure, the bottom enclosure having a surface including a button guide latch;

a reservoir disposed within the body for containing a medicament;

an injection needle for penetrating the skin of the patient, the needle having a lumen and communicating with the reservoir when the device is activated;

a pressurizing system for pressurizing the reservoir when the device is activated; and

an activator button movably disposed on the body and movable from a pre-activated position to an activated position, the activator button including an activation arm;

wherein when the activator button is moved from the pre-activated position to the activated position, an end of the activation arm engages with the button guide latch and prevents movement of the activator button from the activated position to the pre-activated position;

wherein the button guide latch comprises a retaining post; and

wherein the end of the activation arm comprises a cantilevered tab extending from the activation arm.

2. The device according to claim 1, wherein:

the retaining post comprises a guide surface and a retaining surface disposed adjacent to the guide surface at an end of the guide surface;

the tab comprises a bearing surface and a locking surface disposed adjacent to a cantilevered end of the bearing surface; and

when the activator button is moved from the pre-activated position to the activated position, the bearing surface directly contacts and slides along the guide surface until the cantilevered end of the bearing surface passes the end of the guide surface and the locking surface of the tab engages the retaining surface of the retaining post.

3. The device according to claim 2, wherein:

when the activator button is moved from the pre-activated position to the activated position, the contact between the bearing surface and the guide surface deforms at least one of the bearing surface, the guide surface, and the activation arm; and

the at least one deformed surface returns to a substantially un-deformed state when the cantilevered end of the bearing surface passes the end of the guide surface.

4. The device according to claim 1, wherein the tab forms an acute angle with a main portion of the activation arm.

5. The device according to claim 1, wherein the retaining post extends substantially perpendicular from the surface of the bottom enclosure.