Cup cap for straw cup and straw cup

Abstract

The present disclosure relates to a cup cap 20 for a straw cup and a straw cup 1. The cup cap for the straw cup proposed herein comprises a cap body 30 and a movable cap 40 mounted on the cap body. The movable cap is movable between a closed position and an open position. The cap body is provided with a suction nozzle 34 and a normally closed valve 32. A guide track 46 is provided on a side of the movable cap facing the cap body. During a movement of the movable cap between the closed position and the open position, the guide track passes through the normally closed valve and applies a force to the normally closed valve to open the normally closed valve to balance the pressure inside and outside the straw cup. The present disclosure further provides a straw cup comprising such a cup cap. Embodiments of the present disclosure may prevent leakage, and may prevent hot water in the cup from spilling out from the suction nozzle and causing scald during the opening of the straw cup.

1 . A cup cap for a straw cup, comprising:
 a cap body provided with a suction nozzle and a normally closed valve; and   a movable cap mounted on the cap body and being able to move between a closed position and an open position;   wherein a guide track is provided on a side of the movable cap facing the cap body, and wherein during a movement of the movable cap between the closed position and the open position, the guide track passes through the normally closed valve and applies a force to the normally closed valve to open the normally closed valve to balance the pressure inside and outside the straw cup.   
     
     
         2 . The cup cap according to  claim 1 , wherein the guide track is formed by a first side wall, a second side wall, and a channel between the first side wall and the second side wall, the normally closed valve has a protrusion protruding out of the cap body, wherein a dimension of the protrusion in a width direction of the channel is greater than a width of the channel, so that when the guide track passes through the normally closed valve, the guide track is suited to apply the force to the protrusion. 
     
     
         3 . The cup cap according to  claim 2 , wherein the channel includes a wide portion and a narrow portion, a width of the wide portion is greater than a width of the narrow portion, the dimension of the protrusion in the width direction of the channel is greater than the width of the narrow portion of the channel, the wide portion is suited to guide the normally closed valve into or out of the guide track, and the narrow portion is suited to apply the force to the normally closed valve. 
     
     
         4 . The cup cap according to  claim 1 , wherein the normally closed valve is a one-way valve, the one-way valve opens when an internal air pressure of the straw cup is lower than an external air pressure, and closes when the internal air pressure of the straw cup is higher than the external air pressure. 
     
     
         5 . The cup cap according to  claim 4 , wherein the normally closed valve is a spherical or V-shaped one-way normally closed silicone valve. 
     
     
         6 . The cup cap according to  claim 1 , wherein the normally closed valve is made of an elastic material, and the force squeezes the normally closed valve to deform it, thereby opening the normally closed valve. 
     
     
         7 . The cup cap according to  claim 3 , wherein the normally closed valve includes a membrane and a slit at a center of the membrane, wherein the membrane is disposed at or near the protrusion of the normally closed valve, and the force opens the slit. 
     
     
         8 . The cup cap according to  claim 7 , wherein the membrane is flat, spherical or V-shaped, and a thickness of the membrane of the normally closed valve is in a range of 0.3 mm to 1.2 mm. 
     
     
         9 . The cup cap according to  claim 8 , wherein the thickness of the membrane of the normally closed valve is 0.6 mm. 
     
     
         10 . The cup cap according to  claim 7 , wherein the normally closed valve is arranged in such a way that an extending direction of the slit of the normally closed valve is parallel to the width direction of the channel. 
     
     
         11 . The cup cap according to  claim 1 , wherein the normally closed valve and the guide track are arranged relative to the suction nozzle such that before the suction nozzle is released, the guide track passes through the normally closed valve to open the normally closed valve. 
     
     
         12 . The cup cap according to  claim 1 , wherein the normally closed valve is disposed at a top of the cap body, and wherein when the movable cap is at the closed position, the guide track is located between the normally closed valve and the suction nozzle and is close to the normally closed valve. 
     
     
         13 . The cup cap according to  claim 1 , wherein an extending direction of the guide track is parallel to a moving direction of the movable cap. 
     
     
         14 . The cup cap according to  claim 1 , wherein the movable cap is rotatably or slidably mounted on the cap body. 
     
     
         15 . A straw cup, comprising:
 a cup body; and   
       the cup cap according to  claim 1  for connecting to the cup body.