Patent Publication Number: US-2015085243-A1

Title: Arm of spectacles

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to spectacles and in particular to an arm of spectacles. 
     2. Description of Related Art 
     Due to contemporary people&#39;s hard work and excessive use of eyes, they overloaded their eyes in poor sight consequently and cannot clearly see the environment and surrounding objects. Therefore, corrective spectacles are developed to be worn on the head of a user such that the corrective lens can be matched to the eyes of the user in order that the user can clearly see the environment and surrounding objects through the corrective lens to achieve the effect of sight correction. 
     The traditional spectacles mainly comprise a frame, a pair of arms, and a pair of corrective lenses. Each corrective lens which corresponds to the eye is installed in the frame. One end of each arm is connected to the frame and each of the arms is spaced arranged. The end of each arm away from the frame has a hook portion. Thus, the spectacles are placed on the head of the user by the hook portion hooking the ear such that the spectacles can be retained firmly on the head of the user. 
     However, the traditional spectacles suffer from the follow disadvantages. Because the distance between the hook portion of the arm and the frame is not adjustable, the gap between the hook portion and the ear is likely to be excessive for a smaller head. Consequently, the hook portion can not hook the ear firmly and then the spectacles are liable to become loose and fall off. In contrast, for a bigger head, an excessive force is exerted when the hook portion hooks the ear, resulting in the spectacles in a tight wearing condition and the user&#39;s head suffering uncomfortable feeling. 
     SUMMARY OF THE INVENTION 
     One objective of the present invention is to provide an arm of spectacles, which changes the distance between the hanging part and the frame member to improve the comfort of a user wearing spectacles. 
     To achieve the above objective, the present invention provides an arm of spectacles having a frame member. The arm comprises an arm rod and an adjustable hanging assembly; one end of the arm rod is connected to the frame member; the adjustable hanging assembly comprises a hanging part connected to the arm rod and a positioning member disposed between the arm rod and the hanging part. 
     The present invention also has the following effects. By means of the design of a bump which is disposed on the sliding bushing and can be latched and positioned to a gear rack of the arm rod, the effect of positioning can be achieved to prevent the sliding bushing from sliding accidently. 
    
    
     
       BRIEF DESCRIPTION OF DRAWING 
         FIG. 1  is a perspective view of the first embodiment of the present invention; 
         FIG. 2  is a schematic of the first embodiment of the present invention; 
         FIG. 3  is the first view of the first embodiment of the present invention in a state of use; 
         FIG. 4  is the second view of the first embodiment of the present invention in a state of use; 
         FIG. 5  is the third view of the first embodiment of the present invention in a state of use; 
         FIG. 6  is a perspective view of the second embodiment of the present invention; 
         FIG. 7  is the first view of the second embodiment of the present invention in a state of use; and 
         FIG. 8  is the second view of the second embodiment of the present invention in a state of use. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     The detailed description and technical contents regarding the present invention are explained as follows, accompanied with the attached figures. However, the attached figures are only used for reference and explanation, not to limit the present invention. 
     Please refer to  FIGS. 1 and 2 , which are the perspective view and the schematic of the first embodiment of the present invention, respectively. The present invention provides an arm  1  of spectacles  8 . The arm  1  mainly comprises an arm rod  10  and an adjustable hanging assembly  20 . 
     The spectacle  8  has a frame member  81  and a pair of arms  1 ; the frame member  81  has a pair of mounting portions  811  which make two spectacle glasses  82  installed in the mounting portions  811 . 
     Each of the arms  1  comprises an arm rod  10  and an adjustable hanging assembly  20 . 
     Each of the arm rods  10  has one end thereof connected to the frame member  81 . The arm rods ( 10 ) are spaced arranged and in parallel with each other. 
     Each of the adjustable hanging assemblies  20  comprises a hanging part  21  and a positioning member  22  comprising a sliding bushing  221 , a gear rack  222 , and a bump  223 . 
     Each sliding bushing  221  has a connecting hole  2211 ; each sliding bushing  221  is slidingly connected to and sleeved around the outside of the corresponding arm rod  10  such that each arm rod  10  passes through and connects in the corresponding connecting hole  2211  of the sliding bushing  221 . 
     Each of the hanging parts  21  extends from a side peripheral surface of the corresponding sliding bushing  221  and has a fishhook shape, in which when each sliding bushing  221  slides along the corresponding arm rod  10 , it is able to drive the hanging part  21  to move along the corresponding arm rod  10  to adjust the distance between each hanging parts  21  and the frame member  81 . 
     Each of the gear rack  222  is formed on the corresponding arm rod  10  and comprises a plurality of teeth  2221  spaced arranged; each of the teeth  2221  has a triangle shape; each bump  223  is projected from an inner perimeter of the corresponding connecting hole  2211  and is disposed corresponding to the respective teeth  2221  of the corresponding gear rack  222 ; each bump  223  and any teeth  2221  of the corresponding gear rack  222  can be latched and positioned to each other; each bump  223  has a triangle shape. 
     Please refer to  FIGS. 3-5 , which are the first, second, and third views of the first embodiment of the present invention in a state of use, respectively. In operation, the distance between each hanging part  21  and the frame member  81  is adjusted in response to the size of the user&#39;s head  9 . Therefore, when the size of the user&#39;s head  9  is smaller, the sliding bushing  221  is slid along the corresponding arm rod  10  toward the frame member  81  such that each hanging part  21  moves toward the frame member  81  to decrease the distance between each hanging part  21  and the frame member  81  such that no excessive gap appears between each hanging part  21  and the frame member  81  during the user wearing the spectacles  8 . Thus, the frame member  81  can be retained firmly on the head  9  and will not become loose and fall off. 
     In addition, when the size of the user&#39;s head  9  is bigger, the sliding bushing  221  can be moved away from the frame member  81  such that each hanging part  21  moves toward the arm rod  10  to increase the distance between each hanging part  21  and the frame member  81 . Consequently, the distance between each hanging part  21  and the frame member  81  is not too short during the user wearing the spectacles  8  to cause each hanging part  21  to hook the corresponding ear  91  extremely tight. Thus, the comfort of the head  9  can be improved during the user wearing the spectacles  8 . 
     By this means, after the distance between each hanging part  21  and the frame member  81  is adjusted well, the spectacles  8  are worn on the user&#39;s head  9 . Further, each hanging part  21  hooks the corresponding ear  91  firmly to achieve the effect of attaching the spectacles  8  on the head  9  firmly. This also avoids the uncomfortable feeling of tightness or looseness, and further improves the comfort of the head  9  of the user wearing the spectacles  8 . 
     Further, by means of the design of the bump  223  which is disposed on each sliding bushing  221  and can be latched and positioned to the gear rack  222  of each arm rod  10 , when each sliding bushing  221  slides to a proper position, the effect of positioning can be achieved by the latching between each bump  223  and the corresponding gear rack  222  to prevent the sliding bushing  221  from sliding accidently and thus, the convenience and comfort of the user is improved. 
     Please refer to  FIGS. 6-8 , which are the perspective view, the first view in a state of use, and the second view in a state of use of the second embodiment of the present invention, respectively. The main difference between these two embodiments is that in the second embodiment, each hanging part  21  is replaced with the hanging part  24  and each positioning member  22  is replaced with the positioning member  25 . 
     Each of the hanging parts  24  comprises a fixed segment  241  and a free segment  242  extending from the fixed segment  241 ; one end of each free segment  242  away from the corresponding fixed segment  241  has a hook portion  2421 ; the segment between each fixed segment  241  and the corresponding free segment  242  has a fishhook shape; each hanging part  24  is a flexible member. 
     Each of the positioning members  25  comprises a plurality of female units  251  and a plurality of male units  252 ; each of the female units  251  is engaged with the corresponding male unit  252 ; each male unit  252  is a respective protrusion  2521  projected from the fixed segment  241 ; the respective protrusion  2521  can be inserted into and fixed in the corresponding recess  2511 ; the recesses  2511  are spaced arranged and the protrusions  2521  are spaced arranged, in which each female unit  251  is engaged with the corresponding male unit along the corresponding arm rod  10  such that the free segment  242  generates a hook portion  2421  of various shapes. 
     In operation, when the size of the user&#39;s head  9  is smaller, some protrusions  2521  are detached from the recesses  2511  along the corresponding arm rod  10  toward the frame member  81  such that each free segment  242  extends toward the frame member  81  and extends away from the arm rod  10  to change the shape of the corresponding hook portion  2421  and decrease the distance between the hook portion  2421  of each free segment  242  and the frame member  81 . Therefore, no excessive gap appears between the hook portion  2421  of each free segment  242  and the corresponding ear  91  during the user wearing the spectacles  8  and the frame member  81  can be retained firmly on the head  9  and will not become loose and fall off. 
     In addition, when the size of the user&#39;s head  9  is bigger, some protrusions  2521  away from the frame member  81  can be inserted into and fixed in some recesses  2511 , which are located away from the frame member  81 , along the corresponding arm rod  10  away from the frame member  81  such that each free segment  242  is attached to the corresponding arm rod  10  and moves away from the frame member  81  to change the shape of the corresponding hook portion  2421  and also the distance between the hook portion  2421  of each free segment  242  and the frame member  81  is increased. As a result, the distance between each hook portion  2421  and the frame member  81  is not too short during the user wearing the spectacles  8  to cause each hook portion  2421  to hook the corresponding ear  91  extremely tight. Thus, the comfort of the head  9  can be improved during the user wearing the spectacles  8  and the comfort of the user wearing the spectacles  8  can be enhanced. 
     Besides, each protrusion  2521  inserted into and fixed in the corresponding recess  2511  can achieve the effect of positioning to prevent the hanging part  24  from detaching from the arm rod  10  to further improve the convenience and comfort of the user&#39;s operation. 
     In summary, the arm of the spectacles of the present invention is indeed useful, novel and non-obvious. Also, the structure of the present invention has not been anticipated by similar products and has not been used in public, which meet the requirement of patent application. Please examine the application carefully and grant it a patent for protecting the rights of the inventor.