Hat band structure

Abstract

The hat band structure includes a band and a lock mechanism. The band has ends, and each end has a slot portion with tooth portion. The lock mechanism has a base, a moving part and an adjusting wheel. The base has a circular through-opening with locking teeth, and has a pivoting post on the bottom. The base has a through hole where the pillar inserts in. The moving part includes a central body, a gear, flexible arms, locking portions and a pivoting hole. The adjusting wheel has an axis portion and pivoting posts on the rear. The axis portion of the adjusting wheel is rotatably inserted in the through hole of the base. Each pivoting post is inserted into the corresponding flexible arm, and a lighting device is disposed in front of the adjusting wheel to provide warning signals. The length of the hat band structure can be easily adjusted.

1 . A hat band structure, comprising:
 a band, having two ends, each of the two ends having a slot portion, the slot portion having a tooth portion thereon; and   a lock mechanism, having a base, a moving part, and an adjusting wheel, wherein the base has a circular through-opening concavely formed thereon; the circular through-opening has a plurality of locking teeth on a side wall thereof, and has a pivoting post on a bottom thereof; the base has a through hole, and the pillar is disposed inside the through hole; the moving part includes a central body, a gear, a plurality of flexible arms, a plurality of locking portions and a pivoting hole, the gear extends from a rear of the central body, the flexible arms with bending shapes extend from side edges of the central body, the locking portions are formed on out edges of the flexible arms to contact with the corresponding locking teeth, the pivoting post of the base pivotedly connects to the pivoting hole of the moving part, the gear of the moving part extends in the slot portion of the band to engage with the tooth portion of the slot portion; the adjusting wheel has an axis portion and a plurality of pivoting posts on a rear thereof, the axis portion of the adjusting wheel is rotatably inserted in the through hole of the base, each of the pivoting posts is inserted into the corresponding flexible arm, and the adjusting wheel further has a lighting device on a front thereof.   
     
     
         2 . The hat band structure according to  claim 1 , wherein the lighting device includes a receiving recess, a printed circuit board, a switch, a lighting element and a transparent cover, the printed circuit board is received in the receiving recess, the switch and the lighting element are electrically connected to the printed circuit board, the transparent cover is disposed in front of the receiving recess. 
     
     
         3 . The hat band structure according to  claim 2 , wherein the adjusting wheel has a polygonal shape with a plurality of sides, and the switch protrudes on one of the sides. 
     
     
         4 . The hat band structure according to  claim 1 , wherein the base has two side openings on two sides thereof. 
     
     
         5 . The hat band structure according to  claim 4 , wherein the lock mechanism further has a bottom plate disposed rearward of the base, the bottom plate has two extending portions on two sides thereof, and the two extending portions are respectively inserted into the two side openings. 
     
     
         6 . The hat band structure according to  claim 1 , wherein the lock mechanism further has a bottom plate disposed rearward of the base, and the bottom plate has a hole. 
     
     
         7 . The hat band structure according to  claim 6 , wherein the axis portion of the adjusting wheel has a locking hole on a center thereof, the lock mechanism has a fixing element, and the fixing element penetrates through the hole and engages with the locking hole. 
     
     
         8 . The hat band structure according to  claim 1 , wherein each of the flexible arms extends toward the central body of the moving part to form a stopping arm. 
     
     
         9 . The hat band structure according to  claim 2 , further comprising a convex lens disposed on the transparent cover.