Breathing mask

1. A breathing mask, comprising:

a receiving cover, comprising an engagement portion for engaging a patient's mouth portion and/or nose portion, a connection portion connected to a breathing pipe, and an elastic deformable portion for connecting the engagement portion with the connection portion;

a forehead support, fixedly disposed on the connection portion; wherein the forehead support is constructed swingable towards or away from the patient's forehead relative to the receiving cover when the elastic deformable portion is in a compressed state or a tensioned state, respectively;

a receiving cover fixing frame, fixedly disposed external of the engagement portion; and,

an elastic member, disposed at a bottom of the receiving cover and used for connecting the forehead support with the receiving cover fixing frame.

2. The breathing mask according to claim 1 , wherein the elastic deformable portion comprises:

a flat structure, disposed on a bottom of the receiving cover; and

a wrinkle structure, extending downward along both sides from a top of the receiving cover to the flat structure.

3. The breathing mask according to claim 2 , wherein the wrinkle structure is constructed as a corrugated shape, a serrated pipe, a concave shape, or a convex shape.

4. The breathing mask according to claim 2 , wherein the wrinkle structure has a U-shaped or V-shaped recess opening towards an exterior or interior of the receiving cover.

5. The breathing mask according to claim 1 , wherein the elastic deformable portion is a wrinkle structure extending downward along both sides from a top of the receiving cover to a bottom of the receiving cover.

6. The breathing mask according to claim 1 , the elastic deformable portion is made of rubber material.

7. The breathing mask according to claim 1 , wherein the forehead support comprises:

an annular portion, sleeved around the connection portion;

a rack, disposed on the annular portion and adapted to be stuck on the patient's forehead; and,

a first connection structure, disposed at a top end of the rack and used to mount a head band.

8. The breathing mask according to claim 7 , wherein the first connection structure is constructed as a double-hook structure.

9. The breathing mask according to claim 7 , wherein the rack is bar-shaped and curved.

10. The breathing mask according to claim 1 , wherein the elastic member is constructed as a sheet having an M-shaped cross section.

11. The breathing mask according to claim 1 , wherein the receiving cover fixing frame comprises:

a matching sleeve, fixed around the engagement portion; and,

a second connection structure, disposed on the matching sleeve and used to mount a head band.

12. The breathing mask according to claim 11 , wherein the second connection structure is constructed as a double-hook structure.

13. The breathing mask according to claim 11 , wherein the engagement portion comprises:

two positioning shoulders respectively disposed on two sides of the matching sleeve; and/or,

a plurality of positioning protrusions disposed on the two sides of the matching sleeve.

14. The breathing mask according to claim 13 , wherein the plurality of positioning protrusions comprises two protrusions arranged radially opposite to each other.

15. The breathing mask according to claim 13 , wherein the plurality of positioning protrusions is disposed at a middle position between a top and a bottom of the engagement portion.

16. The breathing mask according to claim 1 , wherein the forehead support and the receiving cover fixing frame are made of resin material; and/or,

the elastic member is made of resin or rubber material.

17. The breathing mask according to claim 1 , wherein the receiving cover is constructed as a liner structure.

18. The breathing mask according to claim 1 , wherein the engagement portion of the receiving cover is constructed as a liner structure, and the liner structure is detachably connected to the elastic deformable portion.

19. The breathing mask according to claim 1 , wherein the connection portion of the receiving cover is constructed to be rotatably connected to the breathing pipe.