Abstract:
Swimming goggles includes a frame body, lenses, buckles disposed at opposite end portions of the frame body, and a head strap passed through the buckles. The frame body forms shielding portions at outer sides of the frame body. The buckles have bases and operating devices being shielded by the shielding portions. The operating devices are operated through the shielding portions so as to adjust the head strap and prevent a wearer&#39;s hair from being snapped and provide a comfort wearing.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to swimming goggles, and particularly to swimming goggles having buckles operated by pressing upper and lower portions thereof to quickly and easily adjust the length of a head strap without snapping a wearer&#39;s hair. 
     2. Related Art 
     In general, swimming goggles are provided with buckles disposed on left and right sides of frames for connecting a head strap, which is allowed to be adjustable in length through the buckles. Each of the buckles includes an engaging arm for engaging serrated grooves of the head strap. When the engaging arm engages the head strap, the head strap merely can be tightened in a single direction. To loosen the head strap, the engaging arm has to be disengaged with the serrated groove. As a result, adjustment of the head strap is directly associated with engagement of the engaging arm and the serrated groove. 
     Traditional buckles, which controls engagement of the engaging arm, is commonly designed based on a first lever principle, that is, to exert pressing force on one end of the engaging arm, while the opposite end of the engaging arm moves in a reverse direction to release the engaging arm. Furthermore, a resilient element is provided on the end of the engaging arm where pressing force applied thereon for returning the engaging arm. 
     However, pressing elements used to press the engaging arms of traditional buckles are disposed at a side of the buckles directly contacting a wearer&#39;s head and therefore are easily to snap the wearer&#39;s hair. Furthermore, a traditional engaging arm must operate with an additional element, the resilient element, to help the engaging arm return to a previous state. Consequently, traditional buckles have complex structure which leads to a high manufacturing cost and are difficult for assembly. 
     SUMMARY OF THE INVENTION 
     Accordingly, an object of the present invention is to provide swimming goggles having buckles being shielded so as to prevent a wearer&#39;s hair from being snapped and to provide a comfort wearing. 
     Another object of the present invention is to provide swimming goggles having buckles of simple structure and easily to be assembled, the buckles having operating devices formed in one entity and intended to conveniently engage and disengage a head strap. 
     To achieve the above-mentioned objects, swimming goggles of the present invention comprise a frame body having left and right frames, a nose bridge interconnecting the left and right frames, and padding portions attached to the left and right frames, respectively, wherein the left and right frames form shielding portions at outer sides of the left and right frames, respectively; lenses assembled with the frame body; buckles disposed at opposite end portions of the frame body and partially shielded by the shielding portions, respectively. Each of the buckles comprises a base provided with a pivot portion, and an operating device assembled with the base and shielded by the shielding portion. A head strap has two opposite free end portions passed through the pivot portions, respectively. Each free end portion of the head strap forms a plurality of serrated grooves for being engaged with the operating device. 
     In accordance with the present invention, the shielding potion integrally forms oval humps with respect to the operating portions of the second arm for facilitating manually operation. 
     In accordance with the present invention, each of the bases comprises connectable first and second casings, the first casing has a hollow portion therein, the pivot portion including a shaft and pivot holes. The operating device comprises a first arm and a second arm, the first and second arms cooperatively forming a substantially T shape such that one end of the first arm integrally connected to a middle portion of the second arm, and another end of the first arm is formed with an engaging portion, the second arm has an arc shape, and operating portions are formed on opposite ends of the second arm and located in alignment with each other. With the above-mentioned structure, when the operating portions are being pressed concurrently, the first arm moves in conjunction with the second arm so as to allow the engaging portion to move to engage and disengage the head strap. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is an exploded perspective view of swimming goggles of the present invention; 
         FIG. 2  is a perspective assembly view of  FIG. 1 ; 
         FIGS. 3 and 5  are front elevational views of the swimming goggles; 
         FIGS. 4A to 4C  are cross-sectional views taken along the lines  4 A- 4 A,  4 B- 4 B,  4 C- 4 C in  FIG. 3 , respectively; 
         FIGS. 6 and 6A  are a cross-sectional view taken along the line  6 A- 6 A in  FIG. 5  and partially enlarged view thereof; 
         FIGS. 7 and 7A  are a cross-sectional view taken along the line  7 A- 7 A in  FIG. 5  and partially enlarged view thereof; 
         FIG. 8  is  FIG. 2  with a shielding portion being removed to schematically show an operating device; 
         FIG. 8A  is a partially enlarged view of  FIG. 8 ; and 
         FIG. 9  is a schematic view showing a state of adjusting a head strap by pressing upper and lower portions of the operating device. 
     
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Referring to  FIGS. 1 to 4C , swimming goggles  1  of the present invention comprises: a frame body  2 , lenses  30 ,  31 , buckles  4  disposed at opposite end portions of the frame body  2 , and a head strap  5  passed through the buckles  4  (as shown in  FIG. 9 , the head strap  5  forms a plurality of serrated grooves  50 ). The frame body  2  has left and right frames  20 ,  21 , a nose bridge  22  interconnecting the left and right frames  20 ,  21 , and padding portions  23 ,  24  attached to the left and right frames  20 ,  21 , respectively, wherein the first and second frame  20 ,  21 , the nose bridge  22 , and the padding portions  23 ,  24  are integrally formed and made of Thermal Plastic Rubber (TPR), and the padding portions  23 ,  24  are thinner than the left and right frames  20 ,  21  for providing a soft contact when wearing. Furthermore, shielding portions  25  are integrally formed on outer sides of the left and right frames  20 ,  21 , respectively, and are intended to shield and hide the buckles  4  behind the shielding portions  25  (as shown in  FIG. 2 ). Each of the shielding portions  25  integrally forms oval humps  26  protruding outwardly of upper and lower portions of the shielding portion  25 , respectively. The oval humps  26  are intended for facilitating manually operation. 
     Peripheral portions of the lenses  30 ,  31  are formed with a plurality of injection holes  301 ,  311  and two connecting holes  302 ,  312 , respectively. The two connecting holes  302 ,  312  are disposed on portions of the lenses  30 ,  31  far away from the nose bridge  22 , for being connected with the buckles  4  and providing a preliminary position of the buckles  4 . 
     Referring to  FIG. 1  in combination with the  FIGS. 5 to 8  and  8 A, the buckles  4  are made of polycarbonate (PC), nylon resin, or thermoplastic polyurethane. Each buckle  4  comprises a base  40  and an operating device  41 , wherein the base  40  comprises first and second casings  401 ,  402  connectable with each other. The first casing  401  has a hollow portion  403  formed therein and a pivot portion  404  formed at a side of the first casing  401 . The pivot portion  404  consists of a shaft  405  and pivot holes  406  for receiving opposite ends of the shaft  405 , and the pivot portion  404  is configured to allow the head strap  5  to pass therethrough. Furthermore, a connecting arm  407  extends laterally from the first casing  401  towards the lenses  30 ,  31 , and is provided with two pegs  408  corresponding to and inserted in the connecting holes  302 ,  312  of the lenses  30 ,  31  in order for preliminarily positioning the first casings  401  on the lenses  30 ,  31 . The first casing  401  forms multiple assembling holes  409  at upper and lower sides thereof. The second casing  402  is disposed at a side of the hollow portion  403  and intended to operate with the operating device  41 . The second casing  402  is provided with multiple pillars  42  protruding outwards of upper and lower sides of the second casing  402  so as to be inserted in the assembling holes  409  and to connect the first and second casings  401 ,  402 . Particularly, the second casing  402  has two guiding elements  44  spaced apart from each other, and a positioning slot  43  formed between the two guiding elements  44 . 
     Each of the operating devices  41  comprises a first arm  411  and a second arm  412 , the first and second arms  411 ,  412  cooperatively forming a substantially T shape such that one end  414  of the first arm  411  integrally connected to a middle portion of the second arm  412 , and another end of the first arm  411  is formed with an engaging portion  413  which extends outwardly from opposite sides of the first arm  411 . The first arm  411  is movably disposed in the positioning slot  43  with the engaging portion  413  engaged with the two guiding elements  44  in such a way that the engaging portion  413  is capable of moving along surfaces of the two guiding elements  44  in conjunction with the first arm  411  to disengage the serrated grooves  50  of the head strap  5  (as shown in  FIG. 9 ). The second arm  412  has an arc shape and operating portions  415 ,  416  formed on opposite ends of the second arm  412 . The operating portions  415 ,  416  are located in alignment with each other in a same axial direction, and each of the operating portions  415 ,  416  has a shape corresponding to the oval hump  26  so as to completely fit to the oval hump  26 . 
     Referring to  FIG. 1  in combination with  FIG. 2  and  FIG. 8A , the present invention in assembly, firstly, the first and second casings  401 ,  402  are connected with the assembling holes  409  and the pillars  42 . Then, the operating device  41  of the buckle  4  is disposed inside the shielding portion  25  where the operating portions  415 ,  416  perfectly fit in the oval humps  26  and are exposed outside of the first casing  401 , and the engaging portions  413  of the first arm  411  engage with the two guiding elements  44  and expose to the positioning slot  43  (as shown in  FIG. 8A ). Next, the pegs  408  of the connecting arm  407  are inserted in the connecting holes  302 ,  312  of the lenses  30 ,  31 . Finally, through the injection molding technique the left and right frames  20 ,  21 , the nose bridge  22 , the padding portions  23 ,  24 , the connecting arms  407 , and the injection holes  301 ,  311  and the connecting holes  302 ,  312  of the lenses  30 ,  31  are all formed integrally. 
     Referring to  FIG. 2 , because the buckles  4  are disposed in and shielded by the shielding portions  25 , the buckles  4  are not likely to contact a wearer&#39;s head and snap the wearer&#39;s hair. Referring to  FIG. 8A  and  FIG. 9 , to adjust the head strap  5 , it is only needed to press the oval humps  26  concurrently (as indicated by the arrows) to further press the operating portions  415 ,  416 , whereby the second arm  412  deforms accordingly and bends towards the connecting arm  407 . As a result, the first arm  411  moves in conjunction with the second arm  412 , and the engaging portion  413  moves along the surfaces of the two guiding elements  44  towards the connecting arm  407  so as to disengage the serrated grooves  50  of the head strap  5 , whereby the head strap  5  is allowed to move through the pivot portion  404 . Likewise, when the oval humps  26  are not being pressed, the second arm  412  returns to a previous state of not bending, and the engaging portion  413  moves back along the surfaces of the two guiding elements  44  to engage the serrated grooves  50 . 
     It is understood that the invention may be embodied in other forms within the scope of the claims. Thus the present examples and embodiments are to be considered in all respects as illustrative, and not restrictive, of the invention defined by the claims.