Filter holding system for welding mask

1. A filter holding system for holding an optical filter to a mask casing of a welding mask, the filter holding system comprising:

a holding frame body configured to support and accommodate the optical filter; and

a connecting mechanism provided on the holding frame body, the connecting mechanism being configured to connect and disconnect the holding frame body to and from the mask casing,

wherein the connecting mechanism is moveable between a disconnect position and a connect position;

wherein, when at the disconnect position, the connecting mechanism disconnects the holding frame body from the mask casing such that the holding frame body and the mask casing are separable from each other;

wherein, when at the connect position, the connecting mechanism connects the holding frame body to the mask casing;

wherein the connecting mechanism further comprises a connecting pin and a manipulating unit;

wherein the connecting pin is accommodated in a connecting pin accommodating cavity of the holding frame body;

wherein, when at the connect position, the connecting pin extends laterally out of the connecting pin accommodating cavity of the holding frame body such that the connecting pin is adapted to be disposed in an accommodating cavity of the mask casing and wherein, when at the disconnect position, the connecting pin does not extend laterally out of the connecting pin accommodating cavity of the holding frame body, such that at the disconnect position the connecting pin is not adapted to be disposed in the accommodating cavity of the mask casing;

wherein the manipulating unit is connected to the connecting pin such that movement of the manipulating unit is configured to switch the connecting pin between the disconnect position and the connect position; and

wherein a plurality of rails are provided on a side wall of the connecting pin accommodating cavity of the holding frame body, and the manipulating unit is disposed on the holding frame body such that the manipulating unit is slidable along the rails.

2. The filter holding system according to claim 1 , wherein the connecting mechanism further comprises a driving block;

wherein the driving block is secured at an end through a hole of the frame body to a recess of the connecting pin, with the manipulating unit receiving a second end of the driving block.

3. The filter holding system according to claim 1 , wherein a plurality of stop protrusions are provided on the rails, a plurality of corresponding stop protrusions are provided on the manipulating unit, and the manipulating unit is configured to be positioned in the disconnect position and in the connect position by mating the stop protrusions of the rails with the corresponding stop protrusions of the manipulating unit; and wherein the manipulating unit is switchable between the disconnect position and the connect position by asserting an external force on the manipulating unit.

4. The filter holding system according to claim 1 , further comprising a second connecting mechanism, wherein the connecting mechanisms are disposed on a bottom wall of the holding frame body, and wherein one or more protrusions are disposed on a top wall of the holding frame body which are configured to pass through one or more through holes provided on the mask casing.

5. The filter holding system according to claim 1 , wherein the connecting mechanism is disposed on at least one of a bottom wall and a top wall of the holding frame body, and a second connecting mechanism is disposed on at least the other one of the bottom wall and the top wall of the holding frame body.

6. The filter holding system according to claim 1 , wherein an outer surface of the manipulating unit is roughened.

7. The filter holding system according to claim 1 , wherein the holding system is made of synthetic fiber.

8. A welding mask, comprising: a mask casing, a protective film, a headgear, an optical filter and a filter holding system;

wherein the optical filter is held in the filter holding system and is connected on the welding mask with the filter holding system;

wherein the filter holding system comprises:

a holding frame body configured to support and accommodate the optical filter; and

a connecting mechanism provided on the holding frame body, the connecting mechanism being configured to connect and disconnect the holding frame body to and from the mask casing;

wherein the connecting mechanism is moveable between a disconnect position and a connect position;

wherein, when at the disconnect position, the connecting mechanism disconnects the holding frame body from the mask casing such that the holding frame body and the mask casing are separable from each other;

wherein, when at the connect position, the connecting mechanism connects the holding frame body to the mask casing;

wherein the connecting mechanism further comprises a connecting pin and a manipulating unit;

wherein the connecting pin is accommodated in a connecting pin accommodating cavity of the holding frame body;

wherein, when at the connect position, the connecting pin extends laterally out of the connecting pin accommodating cavity of the holding frame body such that the connecting pin is inserted into an accommodating cavity of the mask casing and wherein, when at the disconnect position, the connecting pin does not extend laterally out of the connecting pin accommodating cavity of the holding frame body, such that at the disconnect position the connecting pin is not inserted into the accommodating cavity of the mask casing; and

wherein the manipulating unit is connected to the connecting pin such that movement of the manipulating unit is configured to switch the connecting pin between the disconnect position and the connect position.

9. The welding mask according to claim 8 , wherein the connecting mechanism further comprises a driving block;

wherein the driving block is secured at an end through a hole of the frame body to a recess of the connecting pin, with the manipulating unit receiving a second end of the driving block.

10. The welding mask according to claim 8 , wherein a plurality of rails are provided on a side wall of the connecting pin accommodating cavity of the holding frame body, and the manipulating unit is disposed on the holding frame body such that the manipulating unit is slidable along the rails.

11. The welding mask according to claim 10 , wherein a plurality of stop protrusions are provided on the rails, a plurality of corresponding stop protrusions are provided on the manipulating unit, and the manipulating unit is configured to be positioned in the disconnect position and in the connect position by mating the stop protrusions of the rails with the corresponding stop protrusions of the manipulating unit; and wherein the manipulating unit is switchable between the disconnect position and the connect position by asserting an external force on the manipulating unit.

12. The welding mask according to claim 8 , further comprising a second connecting mechanism, wherein the connecting mechanisms are disposed on a bottom wall of the holding frame body, and wherein one or more protrusions are disposed on a top wall of the holding frame body which are configured to pass through one or more through holes provided on the mask casing.

13. The welding mask according to claim 8 , wherein the connecting mechanism is disposed on at least one of a bottom wall and a top wall of the holding frame body, and a second connecting mechanism is disposed on at least the other one of the bottom wall and the top wall of the holding frame body.

14. The welding mask according to claim 8 , wherein an outer surface of the manipulating unit is roughened.

15. The welding mask according to claim 8 , wherein the holding system is made of synthetic fiber.