Fresh-keeping bag

Abstract

A fresh-keeping bag includes a body, a mouth is defined at a top of the body, a first sealing strip and a second sealing strip are respectively provided on two sides of the mouth, the first sealing strip is provided with a snap-in protrusion, a snap-in groove is defined on the second sealing strip at a position corresponding to the snap-in protrusion, transverse protrusions are provided between two ends of the snap-in protrusion and a bottom of the mouth, the transverse protrusions extend horizontally relative to the snap-in protrusion, transverse grooves corresponding to the transverse protrusions are formed between two ends of the snap-in groove and the bottom of the mouth, and the transverse protrusions are engaged with the transverse grooves after the snap-in protrusion is engaged with the snap-in groove, to completely seal the mouth.

What is claimed is: 
     
         1 . A fresh-keeping bag, comprising a body, wherein a mouth is defined at a top of the body, a first sealing strip and a second sealing strip are respectively provided on two sides of the mouth, the first sealing strip is provided with a snap-in protrusion, a snap-in groove is defined on the second sealing strip at a position corresponding to the snap-in protrusion, the mouth is preliminarily sealed after the snap-in protrusion is engaged with the snap-in groove, transverse protrusions are provided between two ends of the snap-in protrusion and a bottom of the mouth, the transverse protrusions extend horizontally relative to the snap-in protrusion, transverse grooves corresponding to the transverse protrusions are formed between two ends of the snap-in groove and the bottom of the mouth, and the transverse protrusions are engaged with the transverse grooves after the snap-in protrusion is engaged with the snap-in groove, to completely seal the mouth. 
     
     
         2 . The fresh-keeping bag according to  claim 1 , wherein each of the transverse grooves is designed as non-through in a thickness direction of first sealing strip and the second sealing strip, the first sealing strip and the second sealing strip respectively form groove ends at two ends of each of the transverse grooves, and the groove ends are completely engaged with two ends of each of the transverse protrusions after the transverse protrusions are engaged with the transverse grooves, to completely seal the mouth. 
     
     
         3 . The fresh-keeping bag according to  claim 1 , wherein the transverse protrusions are semi-cylindrical in shape, a first side of each of the transverse protrusions gradually rises from the bottom of the mouth, and a second side of each of the transverse protrusions is connected with a curved transition to the snap-in protrusion, and a top of each of the transverse protrusions is higher than a top of the snap-in protrusion. 
     
     
         4 . The fresh-keeping bag according to  claim 2 , wherein the transverse protrusions are semi-cylindrical in shape, a first side of each of the transverse protrusions gradually rises from the bottom of the mouth, a second side of each of the transverse protrusions is connected with a curved transition to the snap-in protrusion, and a top of each of the transverse protrusions is higher than a top of the snap-in protrusion. 
     
     
         5 . The fresh-keeping bag according to  claim 1 , wherein a length of each of the transverse protrusions is greater than a thickness of the snap-in protrusion, and two of the transverse protrusions form a curved “I” in shape with the snap-in protrusion. 
     
     
         6 . The fresh-keeping bag according to  claim 2 , wherein a length of each of the transverse protrusions is greater than a thickness of the snap-in protrusion, and two of the transverse protrusions form a curved “I” in shape with the snap-in protrusion. 
     
     
         7 . The fresh-keeping bag according to  claim 3 , wherein a length of each of the transverse protrusions is greater than a thickness of the snap-in protrusion, and two of the transverse protrusions form a curved “I” in shape with the snap-in protrusion. 
     
     
         8 . The fresh-keeping bag according to  claim 4 , wherein a length of each of the transverse protrusions is greater than a thickness of the snap-in protrusion, and two of the transverse protrusions form a curved “I” in shape with the snap-in protrusion. 
     
     
         9 . The fresh-keeping bag according to  claim 1 , wherein the snap-in protrusion is formed by a plurality of snap-in units spaced at intervals, the snap-in groove is formed by a plurality of snap-in groove units spaced at intervals, and the transverse protrusions are engaged with the transverse grooves after the plurality of snap-in units are engaged with the plurality of snap-in groove units one by one, to completely seal the mouth. 
     
     
         10 . The fresh-keeping bag according to  claim 9 , wherein the plurality of snap-in units are buckles or hooks, the plurality of snap-in groove units are recesses configured to be detachably connected to the buckles or the hooks, and the transverse protrusions are engaged with the transverse grooves after the buckles or the hooks are connected to the recesses one by one, to completely seal the mouth. 
     
     
         11 . The fresh-keeping bag according to  claim 10 , wherein each of the buckles or the hooks is T-shaped, and each of the recesses is formed as an inverted T-shaped counter bore or an inverted T-shaped groove. 
     
     
         12 . The fresh-keeping bag according to  claim 11 , wherein the mouth is provided with a first abutment strip and a second abutment strip on two sides, the buckles or the hooks are arranged on the first abutment strip and are spaced at intervals, a narrower end of each of the buckles or the hooks is connected to the first abutment strip, a wider end of each of the buckles or the hooks is away from the first abutment strip, the recesses are defined on the second abutment strip and spaced at intervals, a narrower end of the inverted T-shaped counter bore or the inverted T-shaped groove faces the first abutment strip, a wider end of the inverted T-shaped counter bore or the inverted T-shaped groove is away from the first abutment strip, and when the mouth is completely sealed, the first abutment strip abuts against the second abutment strip. 
     
     
         13 . The fresh-keeping bag according to  claim 12 , wherein a buffer strip is connected between two adjacent ones of the buckles or the hooks, and the buffer strip protrudes from the first abutment strip. 
     
     
         14 . The fresh-keeping bag according to  claim 12 , wherein the top of the body is configured with a lifting hole. 
     
     
         15 . The fresh-keeping bag according to  claim 12 , wherein a first side edge of the body is connected with a hanging ear.