Printing apparatus
An object of the present disclosure is to reduce liquid leakage resulting from detachment of a cartridge. One embodiment of the present invention is a printing apparatus including: a cartridge having a casing for storing liquid; and an attachment unit configured to attach the cartridge, and the cartridge has a hollow needle that connects with the attachment unit.
1. A printing apparatus comprising:
a cartridge having a casing for storing liquid; and
an attachment unit configured to attach the cartridge,
wherein the cartridge has a hollow needle that connects with the attachment unit,
wherein as a valve spring mechanism that prevents liquid from leaking to the outside, the attachment unit has:
a first valve;
a first seal member that seals a connecting unit between the cartridge and the attachment unit in a case where the cartridge is attached; and
a first coil spring, and
wherein as a valve spring mechanism that prevents liquid from leaking to the outside, the needle has:
a second valve;
a second seal; and
a second coil spring.
2. The printing apparatus according to claim 1 , wherein
the first coil spring is weaker than the second coil spring.
3. The printing apparatus according to claim 1 , wherein
a tip of the second valve is a convex shape.
4. The printing apparatus according to claim 3 , wherein
a protruding shape is not provided at a tip of the first valve and as regards a position in a direction in which the needle extends, the convex shape of the second valve protrudes from an outer wall of the needle.
5. The printing apparatus according to claim 3 , wherein
a protruding shape is provided at the tip of the first valve and as regards a position in a direction in which the needle extends, the convex shape of the second valve does not protrude from an outer wall of the needle.
6. The printing apparatus according to claim 1 , wherein
the attachment unit further has a cover for fixing the first seal member.
7. The printing apparatus according to claim 6 , wherein
at the time of detaching the cartridge, liquid gathers in a space surrounded by the first valve, the first seal member, and an outer wall of the needle.
8. The printing apparatus according to claim 7 , wherein
after detachment of the cartridge, liquid stagnates inside the cover.
9. The printing apparatus according to claim 6 , wherein
a diameter of an opening configured by the cover is larger than a diameter of the needle.
10. The printing apparatus according to claim 9 , wherein
the cover plays a role as a guide mechanism that guides the cartridge at the tome of attachment of the cartridge.
11. The printing apparatus according to claim 1 , wherein
a base end that is one of two ends of the needle and closer to the casing is communicated with the casing and
in a case where the cartridge is attached to the attachment unit, liquid stored in the casing flows in order of the base end, a tip that is one end of the needle and not the based end, and the attachment unit.
12. The printing apparatus according to claim 1 , wherein
the needle is arranged inside a space that is formed in a case where corner portions of an external shape of the cartridge are connected.
13. A printing apparatus comprising:
a cartridge having a casing for storing liquid; and
an attachment unit configured to attach the cartridge, wherein
the cartridge has a first valve, a first seal member, and a first coil spring as a first valve spring mechanism that prevents liquid from leaking to the outside and
the attachment unit has a second valve, a second seal member, and a second coil spring as a second valve spring mechanism that prevents liquid from leaking to the outside.