Pharmaceutical injection device

Patent metadata

Field	Value
Publication number	US-9446206-B2
Application number	US-201113821765-A
Country	US
Kind code	B2
Filing date	Nov 14, 2011
Priority date	Nov 18, 2010
Publication date	Sep 20, 2016
Grant date	Sep 20, 2016

Abstract

A pharmaceutical injection device ( 100 ) comprises a main body ( 1 ), a movable member ( 11 ), a pharmaceutical holding member ( 10 ), and a first detector ( 28 ). The movable member ( 11 ) is mounted movably in the lengthwise direction of the main body ( 1 ). The pharmaceutical holding member ( 10 ) is mounted to the movable member ( 11 ), has a needle mount ( 17 ) for an injection needle ( 16 ) on one end, and houses a pharmaceutical syringe ( 50 ) containing the drug to be injected into a body. The first detector ( 28 ) is provided to the movable member ( 11 ) and detects the mounting of the needle ( 16 ) on the needle mount ( 17 ). The pharmaceutical injection device ( 100 ) improves the accuracy of detecting the mounting of a needle and/or a pharmaceutical syringe.

First claim

The invention claimed is:

1. A pharmaceutical injection device, comprising:
a main body;
a movable member provided in the main body, the movable member being mounted movably in a lengthwise direction of the main body;
a pharmaceutical holding member mounted to the movable member and including a needle mount to which an injection needle is mounted on one end, the pharmaceutical holding member being configured to house a pharmaceutical syringe containing a drug to be injected into a body;
a first detector provided to the movable member and being configured to detect a mounting of an injection needle on the needle mount; and
a detection member configured to move with respect to the movable member when an injection needle has been mounted to the needle mount of the pharmaceutical holding member,
wherein the first detector is provided on an opposite side of the movable member from the needle mount,
the first detector detects the mounting of the injection needle on the needle mount by movement of the detection member in a lengthwise direction of the movable member,
the detection member includes a first detection member and a second detection member that is movable by contact with the first detection member,
the first detector detects movement of the second detection member,
the first detection member includes a protrusion,
the second detection member includes a slender projection extending in the lengthwise direction of the main body,
the protrusion comes into contact with the projection by moving in a direction away from the needle mount with respect to the movable member, and
the first detector detects movement of the projection.

2. The pharmaceutical injection device according to claim 1 , wherein the first detector detects the mounting of an injection needle to the needle mount by detecting a mounting of the pharmaceutical holding member to the main body.

3. The pharmaceutical injection device according to claim 1 , wherein the first detector includes a wireless tag, and the wireless tag transmits detection information from the first detector to a receiver provided to the main body.

4. The pharmaceutical injection device according to claim 1 , wherein the first detector optically detects movement of the detection member.

5. The pharmaceutical injection device according to claim 1 , wherein the first detector is disposed in a center of the movable member in a lengthwise direction of the movable member.

6. The pharmaceutical injection device according to claim 1 , wherein the slender projection has a thick-walled part provided to an end surface on the protrusion side.

7. The pharmaceutical injection device according to claim 6 , wherein the thick-walled part is formed extending from an end of the slender projection on the protrusion side toward the other end.

8. The pharmaceutical injection device according to claim 1 , further comprising a movable member driver configured to move the movable member in the lengthwise direction of the main body in a state that the pharmaceutical holding member has been mounted to the movable member.

9. The pharmaceutical injection device according to claim 1 , further comprising:
a piston driver configured to drive a piston provided inside the pharmaceutical holding member and inject a drug into the body; and
a second detector configured to detect that the piston is in an initial position.

10. The pharmaceutical injection device according to claim 9 , wherein the first detector and the second detector are disposed in proximity to an end of the movable member on the opposite side from the needle mount.

11. The pharmaceutical injection device according to claim 9 , wherein the first detector and the second detector are electrically connected by a flexible cable to a controller provided to the main body.

12. The pharmaceutical injection device according to claim 9 , wherein the first detector is disposed at an angular position of 90 degrees or 180 degrees with respect to the second detector around a center axis of the movable member.

13. The pharmaceutical injection device according claim 1 , wherein the first detector detects the mounting of an injection needle to the needle mount while the movable member is moving with respect to the main body or when the movable member is stopped.

14. The pharmaceutical injection device according to claim 1 , further comprising a notification component configured to stop the movement of the movable member or issues a warning when no mounting of an injection needle to the needle mount is detected.

Assignees

• Iio Toshiaki
• Takabatake Yukihiro
• Panasonic Healthcare Holdings Co Ltd

Inventors

• Iio Toshiaki
• Takabatake Yukihiro

Classifications

• A61M2205/14

  Detection of the presence or absence of a tube, a connector or a container in an apparatus · CPC title

• A61M5/34

  Constructions for connecting the needle {, e.g. to syringe nozzle or needle hub (connecting catheter tubes to hubs A61M25/0014)} · CPC title

• A61M5/20 Primary

  Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically (A61M5/142 {, A61M5/46} take precedence; {hypodermic projectiles F42B12/54}) · CPC title

• A61M2005/2488

  via rotation, e.g. threads or bayonet · CPC title

• A61M5/5086 Primary

  for indicating if defective, used, tampered with or unsterile · CPC title