Headrest assembly for a bathtub and bathtub device

Abstract

A headrest assembly includes a suction cup including an assembling shaft sleeve and a headrest including a headrest convex portion and a headrest concave portion. The headrest concave portion and the headrest convex portion are positioned on a same side of the headrest. The headrest is pivotably connected with the assembling shaft sleeve. The headrest is operable at a first state and a second state and configured to transition between the first state and the second state. The headrest concave portion is located obliquely above the headrest convex portion at the first state and the headrest concave portion is located obliquely below the headrest convex portion at the second state.

What is claimed is: 
     
         1 . A headrest assembly for a bathtub, comprising:
 a suction cup including an assembling shaft sleeve; and   a headrest including a headrest convex portion and a headrest concave portion, the headrest concave portion and the headrest convex portion positioned on a same side of the headrest;   wherein the headrest is pivotably connected with the assembling shaft sleeve; and   wherein the headrest is operable in a first state and in a second state and configured to transition between the first state and the second state, the headrest concave portion located obliquely above the headrest convex portion in the first state and the headrest concave portion located obliquely below the headrest convex portion in the second state.   
     
     
         2 . The headrest assembly of  claim 1 , wherein the headrest concave portion is positioned adjacent to the headrest concave portion. 
     
     
         3 . The headrest assembly of  claim 1 , wherein:
 a side of the headrest adjacent the suction cup includes a fixing sleeve; and   the assembling shaft sleeve is coupled to a rotating shaft sleeve, the rotating shaft sleeve connected with the fixing sleeve.   
     
     
         4 . The headrest assembly of  claim 3 , wherein a sealing ring is provided between the fixing sleeve and the rotating shaft sleeve. 
     
     
         5 . The headrest assembly of  claim 4 , wherein the rotating shaft sleeve includes an annular recess, the sealing ring mounted in the annular recess. 
     
     
         6 . The headrest assembly of  claim 3 , wherein the rotating shaft sleeve is sleeved onto the assembling shaft sleeve. 
     
     
         7 . The headrest assembly of  claim 3 , wherein the rotating shaft sleeve is threadedly connected with the assembling shaft sleeve. 
     
     
         8 . The headrest assembly of  claim 3 , wherein a side of the headrest facing the suction cup includes a headrest recess, the fixing sleeve fixedly connected into the headrest recess. 
     
     
         9 . The headrest assembly of  claim 3 , wherein a connecting shaft is connected between the assembling shaft sleeve and the fixing sleeve, the fixing sleeve pivotably connected with the connecting shaft. 
     
     
         10 . The headrest assembly of  claim 9 , wherein the fixing sleeve includes an inner sleeve, one end of the rotating shaft sleeve connected between the inner sleeve and the fixing sleeve and one end of the connecting shaft pivotably connected into the inner sleeve. 
     
     
         11 . The headrest assembly of  claim 10 , wherein one end of the connecting shaft is threadedly connected with the inner sleeve. 
     
     
         12 . The headrest assembly of  claim 9 , wherein:
 an end of the connecting shaft connected with the suction cup includes a flange;   the suction cup is provided with a mounting groove in communication with a central hole of the assembling shaft sleeve, the flange assembled in the mounting groove; and   the connecting shaft passes through the assembling shaft sleeve and is connected with the fixing sleeve.   
     
     
         13 . A bathtub device, comprising:
 a bathtub; and   a headrest assembly, comprising:
 a suction cup, the suction cup attached to a wall surface of the bathtub; and 
 a headrest including a headrest convex portion and a headrest concave portion, the headrest concave portion and the headrest convex portion positioned on a same side of the headrest; 
 wherein the headrest is operable at a first state and a second state and configured to transition between the first state and the second state, the headrest concave portion located obliquely above the headrest convex portion at the first state and the headrest concave portion located obliquely below the headrest convex portion at the second state. 
   
     
     
         14 . The bathtub device of  claim 13 , wherein the suction cup includes an assembling shaft sleeve, the headrest pivotably connected with the assembling shaft sleeve. 
     
     
         15 . The bathtub device of  claim 13 , wherein:
 a side of the headrest facing the suction cup is provided with a fixing sleeve; and   the assembling shaft sleeve is coupled to a rotating shaft sleeve, the rotating shaft sleeve connected into the fixing sleeve.   
     
     
         16 . The bathtub device of  claim 15 , wherein a sealing ring is provided between the fixing sleeve and the rotating shaft sleeve. 
     
     
         17 . The bathtub device of  claim 13 , wherein a side of the headrest facing the suction cup includes a headrest recess, a fixing sleeve of the suction cup fixedly connected into the headrest recess. 
     
     
         18 . The bathtub device of  claim 13 , wherein:
 at the first state, the headrest concave portion is configured to support a back of a head of a user and the headrest convex portion is configured to support a neck of the user; and   at the second state, the headrest convex portion is configured to support the back of the head of the user.