초록 ▼

A negative pressure storage container includes a container cover, a container body, a rotary device, a gear transmission mechanism and a vacuum pump so arranged that rotating the rotary device drives a driving gear of a transmission gear set of the gear transmission mechanism to rotate an eccentric

A negative pressure storage container includes a container cover, a container body, a rotary device, a gear transmission mechanism and a vacuum pump so arranged that rotating the rotary device drives a driving gear of a transmission gear set of the gear transmission mechanism to rotate an eccentric wheel, causing a link to reciprocate a reciprocating piston of a vacuum pump in creating a negative pressure in the container body. When the negative pressure reaches a certain level, the bottom wall of a plastic inner cover member of the container cover is forced to curve and to carry the driving gear away from the rotary device; at this time, and thus, the rotary device runs idle at this time, preventing overloading the transmission gear set and prolonging the service life of the gear transmission mechanism.

대표청구항 ▼

1. A negative pressure storage container, comprising: a container body comprising a storage chamber with an open side and an anti-slip pad mounted on a bottom surface thereof;a container cover covering said container body, said container cover comprising an outer cover member, an inner cover member

1. A negative pressure storage container, comprising: a container body comprising a storage chamber with an open side and an anti-slip pad mounted on a bottom surface thereof;a container cover covering said container body, said container cover comprising an outer cover member, an inner cover member and an inner plastic cushion member, said outer cover member and said inner cover member being fastened together, said inner cover member being made of a plastic material and having a top side thereof fastened to said outer cover member and an opposing bottom side thereof fastened to said inner plastic cushion member, said inner cover member comprising a suction hole located on a bottom wall thereof, said inner plastic cushion member comprising a suction through hole, which is disposed in communication with the inside space of said container body after said container cover is covered on said container body;a rotary device rotatably connected to said outer cover member of said container cover, said rotary device comprising an inner shaft fixedly fastened to a bottom end thereof and a gear portion located at a distal end of said inner shaft and suspending inside said outer cover member and adapted for driving a gear transmission mechanism;a gear transmission mechanism mounted at said bottom wall of said inner cover member of said container cover, said gear transmission mechanism comprising a transmission gear set, an eccentric wheel and a link, said transmission gear set comprises a driving gear meshed with said gear portion of said inner shaft of said rotary device and drivable by said rotary device to rotate said eccentric wheel, said eccentric wheel being eccentrically and pivotally connected to one end of said link, said link having an opposite end thereof pivotally connected to a reciprocating piston of a vacuum pump;a vacuum pump mounted at said bottom wall of said inner cover member of said container cover and disposed in communication with said suction hole of said inner cover member, said vacuum pump comprising a reciprocating piston drivable by said gear transmission mechanism to reciprocate and to further draw air out of said container body; anda balance spring mounted between said reciprocating piston and said vacuum pump;wherein when said rotary device is rotated by an external force, said gear portion of said inner shaft is forced to rotate said driving gear and then said transmission gear set of said gear transmission mechanism, causing said eccentric wheel to move said link and to further reciprocate said reciprocating piston in drawing air out of said container body, and thus, a negative pressure is created in said container body; when the negative pressure in said container body reaches a predetermined level, said bottom wall of said plastic inner cover member of said container cover is forced to curve in direction toward the inside of said container body, and thus, said transmission gear set of said gear transmission mechanism is moved with the deformed said bottom wall of said inner cover member toward the inside of said container body to disengage said driving gear from said gear portion of said inner shaft of said rotary device, enabling said rotary device to run idle. 2. The negative pressure storage container as claimed in claim 1, wherein said inner cover member comprising a suction hole and a relief channel respectively located on a bottom wall thereof, said inner plastic cushion member comprising a suction through hole, which is disposed in communication with the inside space of said container body after said container cover is covered on said container body; and a relief hole for communication with said relief channel, and said outer cover member comprises a positioning hole; said relief valve rod has an opposing top end thereof upwardly inserted through said positioning hole of said outer cover member; said container cover further comprises an elastic member mounted between said relief valve rod and said relief channel of said inner cover member to support said relief valve rod in the position where said sealing pad seals said relief channel of said inner cover member upon creation of a negative pressure in said container body; said relief valve rod comprises an external passageway so arranged that when said relief valve rod is pressed down by an external force, said external passageway relieves gas through the gap between said sealing pad and said relief channel of said inner cover member and, when the external force is released from said relief valve rod, said elastic member immediately pushes said relief valve rod upward, forcing said sealing pad to seal said relief channel; said relief valve rod further comprises an internal passageway cutting through the opposing top and bottom ends thereof, said internal passageway having a bottom end thereof disposed in communication with a bottom side of said relief channel of said inner cover member and a top end thereof fixedly mounted with a flexible end cap, said flexible end cap being so configured that when a negative pressure is created in said container body, said flexible end cap is sucked by said negative pressure to curve inwards, exhibiting a sign indicative of the presence of said negative pressure. 3. The negative pressure storage container as claimed in claim 2, wherein said flexible end cap comprises a top protruding portion located at the center of a top surface thereof. 4. The negative pressure storage container as claimed in claim 1, wherein said rotary device comprises a rotary knob rotatably mounted in said outer cover member of said container cover and fixedly connected with said inner shaft. 5. The negative pressure storage container as claimed in claim 1, wherein said rotary device comprises a motor module coupled with said inner shaft, a power supply module electrically coupled to said motor module, and a switch control module electrically coupled to said power supply module for controlling on/off of said motor module. 6. A negative pressure storage container, comprising: a container body comprising a storage chamber with an open side and an anti-slip pad mounted on a bottom surface thereof;a container cover covering said container body, said container cover comprising an outer cover member, an inner cover member and an inner plastic cushion member, said outer cover member and said inner cover member being fastened together, said inner cover member being made of a plastic material and having a top side thereof fastened to said outer cover member and an opposing bottom side thereof fastened to said inner plastic cushion member, said inner cover member comprising a suction hole and a relief channel respectively located on a bottom wall thereof, said inner plastic cushion member comprising a suction through hole, which is disposed in communication with the inside space of said container body after said container cover is covered on said container body, and a relief hole for communication with said relief channel;a relief valve rod having a sealing pad located at a bottom end thereof, said relief valve rod being mounted in said outer cover member and movable relative to said outer cover member being a closed position where said sealing pad seals said relief channel and an open position where said sealing pad is moved away from said relief channel for allowing communication between said relief channel and said relief hole;a rotary device comprising an inner shaft, and a gear portion located at a distal end of said inner shaft and suspending inside said outer cover member and adapted for driving a gear transmission mechanism;a gear transmission mechanism mounted at said bottom wall of said inner cover member of said container cover, said gear transmission mechanism comprising a transmission gear set, an eccentric wheel and a link, said transmission gear set comprises a driving gear meshed with said gear portion of said inner shaft of said rotary device and drivable by said rotary device to rotate said eccentric wheel, said eccentric wheel being eccentrically and pivotally connected to one end of said link, said link having an opposite end thereof pivotally connected to a reciprocating piston of a vacuum pump;a vacuum pump mounted at said bottom wall of said inner cover member of said container cover and disposed in communication with said suction hole of said inner cover member, said vacuum pump comprising a reciprocating piston drivable by said gear transmission mechanism to reciprocate and to further draw air out of said container body; anda balance spring mounted between said reciprocating piston and said vacuum pump;wherein when said rotary device is rotated by an external force, said gear portion of said inner shaft is forced to rotate said driving gear and then said transmission gear set of said gear transmission mechanism, causing said eccentric wheel to move said link and to further reciprocate said reciprocating piston in drawing air out of said container body, and thus, a negative pressure is created in said container body; when the negative pressure in said container body reaches a predetermined level, said bottom wall of said plastic inner cover member of said container cover is forced to curve in direction toward the inside of said container body, and thus, said transmission gear set of said gear transmission mechanism is moved with the deformed said bottom wall of said inner cover member toward the inside of said container body to disengage said driving gear from said gear portion of said inner shaft of said rotary device, enabling said rotary device to run idle. 7. The negative pressure storage container as claimed in claim 6, wherein said outer cover member comprises a positioning hole; said relief valve rod has an opposing top end thereof upwardly inserted through said positioning hole of said outer cover member; said container cover further comprises an elastic member mounted between said relief valve rod and said relief channel of said inner cover member to support said relief valve rod in the position where said sealing pad seals said relief channel of said inner cover member upon creation of a negative pressure in said container body; said relief valve rod comprises an external passageway so arranged that when said relief valve rod is pressed down by an external force, said external passageway relieves gas through the gap between said sealing pad and said relief channel of said inner cover member and, when the external force is released from said relief valve rod, said elastic member immediately pushes said relief valve rod upward, forcing said sealing pad to seal said relief channel; said relief valve rod further comprises an internal passageway cutting through the opposing top and bottom ends thereof, said internal passageway having a bottom end thereof disposed in communication with a bottom side of said relief channel of said inner cover member and a top end thereof fixedly mounted with a flexible end cap, said flexible end cap being so configured that when a negative pressure is created in said container body, said flexible end cap is sucked by said negative pressure to curve inwards, exhibiting a sign indicative of the presence of said negative pressure. 8. The negative pressure storage container as claimed in claim 7, wherein said flexible end cap comprises a top protruding portion located at the center of a top surface thereof. 9. The negative pressure storage container as claimed in claim 6, wherein said rotary device comprises a rotary knob rotatably mounted in said outer cover member of said container cover and fixedly connected with said inner shaft. 10. The negative pressure storage container as claimed in claim 6, wherein said rotary device comprises a motor module coupled with said inner shaft, a power supply module electrically coupled to said motor module, and a switch control module electrically coupled to said power supply module for controlling on/off of said motor module. 11. The negative pressure storage container as claimed in claim 6, wherein said transmission gear set further comprises a large gear coaxially mounted at a bottom side of said driving gear, a first small gear meshed with said large gear, an intermediate gear coaxially connected to said first small gear, and a second small gear meshed with said intermediate gear; said eccentric wheel is coaxially connected to said second small gear and pivotally coupled to the one end of said link in an eccentric manner, said link has the opposite end thereof pivotally coupled to said reciprocating piston, and thus, when said rotary device is being rotated, said gear portion of said inner shaft is driven to rotate said driving gear and said large gear, causing said large gear to rotate said first small gear and said intermediate gear, and said second small gear is then driven by said intermediate gear to rotate said eccentric wheel, driving said link to reciprocate said reciprocating piston.