MEDICINE DELIVERY DEVICE

1 . A medicine delivery device, comprising:

a container; and

a dosage setting structure configured to:

receive a dosage setting input; and

set a volume of space within the container for holding a dosage of a medicine to be delivered based on the dosage setting input,

wherein the container, the dosage setting structure, or any combination thereof, is configured such that a first volumetric change of the space matches a second volumetric change of the medicine in the container to within a pre-determined matching tolerance level.

2 . The medicine delivery device of claim 1 , wherein the first volumetric change and the second volumetric change are due to thermal expansion or thermal contraction;

wherein the container has a first thermal expansion coefficient;

wherein the dosage setting structure has at least a second thermal expansion coefficient;

wherein the medicine has a third thermal expansion coefficient; and

wherein at least one of the first thermal expansion coefficient or the second thermal expansion coefficient is related to the third thermal expansion coefficient such that the first volumetric change and the second volumetric change, both of which are responsive to a change in an ambient temperature within the container, match to within the pre-determined matching tolerance level.

3 . The medicine delivery device of claim 2 , wherein the first thermal expansion coefficient, the second thermal expansion coefficient, the third thermal expansion coefficient, or any combination thereof, is negative.

4 . The medicine delivery device of claim 2 , wherein the dosage setting structure includes a shaft and a piston;

wherein the shaft has the second thermal expansion coefficient; and

wherein the piston has a fourth thermal expansion coefficient of opposite polarity to the second thermal expansion coefficient.

5 . The medicine delivery device of claim 4 , wherein a relationship between an absolute value of the second thermal expansion coefficient and an absolute value of the fourth thermal expansion coefficient reflects a relationship between one or more dimensions of the shaft and the piston such that a volumetric change of the shaft and a volumetric change of the piston, both of which responsive to the change in the ambient temperature within the container, substantially cancel out each other; and

wherein the one or more dimensions comprise: a length, a width, a cross-sectional area, a volume, or any combination thereof.

6 . The medicine delivery device of claim 4 , wherein the first thermal expansion coefficient and the third thermal expansion coefficient are equal.

7 . The medicine delivery device of claim 4 , wherein the piston and the shaft comprise different materials.

8 . An apparatus, comprising:

means for holding a medicine;

means for receiving a dosage setting input; and

means for setting a volume of space within the means for holding the medicine, the volume of space for holding a dosage of a medicine to be delivered based on the means for receiving the dosage setting input,

wherein the means for holding the medicine, the means for receiving the dosage setting input, or any combination thereof, is configured such that a first volumetric change of the space matches a second volumetric change of the medicine to within a pre-determined matching tolerance level.

9 . The apparatus of claim 8 , wherein the first volumetric change and the second volumetric change are due to thermal expansion or thermal contraction;

wherein the means for holding the medicine has a first thermal expansion coefficient;

wherein the means for setting the volume of space within the means for holding the medicine has at least a second thermal expansion coefficient;

wherein the medicine has a third thermal expansion coefficient; and

wherein at least one of the first thermal expansion coefficient or the second thermal expansion coefficient is related to the third thermal expansion coefficient such that the first volumetric change and the second volumetric change, both of which are responsive to a change in an ambient temperature within the means for holding the medicine, match to within the pre-determined matching tolerance level.

10 . The apparatus of claim 9 , wherein the first thermal expansion coefficient, the second thermal expansion coefficient, the third thermal expansion coefficient, or any combination thereof, is negative.

11 . The apparatus of claim 9 , wherein the means for setting the volume of space within the means for holding the medicine includes a shaft and a piston;

wherein the shaft has the second thermal expansion coefficient; and

wherein the piston has a fourth thermal expansion coefficient of opposite polarity to the second thermal expansion coefficient.

12 . The apparatus of claim 11 , wherein a relationship between an absolute value of the second thermal expansion coefficient and an absolute value of the fourth thermal expansion coefficient reflects a relationship between one or more dimensions of the shaft and the piston such that a volumetric change of the shaft and a volumetric change of the piston, both of which responsive to the change in the ambient temperature within the means for setting the volume of space within the means for holding the medicine, substantially cancel out each other; and

wherein the one or more dimensions comprise: a length, a width, a cross-sectional area, a volume, or any combination thereof.

13 . The apparatus of claim 11 , wherein the first thermal expansion coefficient and the third thermal expansion coefficient are equal.

14 . The apparatus of claim 11 , wherein the piston and the shaft comprise different materials.

15 . A method, comprising:

receiving, by a dosage setting structure coupled with a container, an input dosage setting, the dosage setting structure and the container being part of a medicine delivery device; and

setting, by the dosage setting structure in conjunction with the container, a volume of space within the container for holding a dosage of a medicine to be delivered based on the dosage setting input,

wherein a first volumetric change of the space matches a second volumetric change of the medicine in the container responsive to a change in an ambient condition to a pre-determined matching tolerance level.

16 . The method of claim 15 , wherein the first volumetric change and the second volumetric change are due to thermal expansion or thermal contraction;

wherein the container has a first thermal expansion coefficient;

wherein the dosage setting structure has at least a second thermal expansion coefficient;

wherein the medicine has a third thermal expansion coefficient; and

wherein at least one of the first thermal expansion coefficient or the second thermal expansion coefficient is determined based on the third thermal expansion.

17 . The method of claim 16 , wherein the first thermal expansion coefficient, the second thermal expansion coefficient, the third thermal expansion coefficient, or any combination thereof, is negative.

18 . The method of claim 16 , wherein the dosage setting structure includes a shaft and a piston;

wherein the shaft has the second thermal expansion coefficient; and

wherein the piston has a fourth thermal expansion coefficient of opposite polarity to the second thermal expansion coefficient.

19 . The method of claim 18 , wherein a relationship between an absolute value of the second thermal expansion coefficient and an absolute value of the fourth thermal expansion coefficient reflects a relationship between one or more dimensions of the shaft and the piston such that a volumetric change of the shaft and a volumetric change of the piston, both of which responsive to the change in the ambient temperature within the container, substantially cancel out each other; and

wherein the one or more dimensions comprise: a length, a width, a cross-sectional area, a volume, or any combination thereof.

20 . The medicine delivery device of claim 18 , wherein the first thermal expansion coefficient and the third thermal expansion coefficient are equal.