Abstract:
A head-worn automatic flipping eyewear comprises a housing ( 1 ), front automatic flipping lenses ( 2 ), rear fixed lenses ( 3 ), a transmission system, a circuit control system and a head fixing piece ( 7 ). The front automatic flipping lenses ( 2 ) are rotatably connected to the housing ( 1 ), and the rear fixed lenses ( 3 ) are fixedly connected to the housing ( 1 ), wherein the front automatic flipping lenses ( 2 ) are located in front of the rear fixed lenses ( 3 ). The transmission system and the circuit control system are located in the housing ( 1 ), and the head fixing piece ( 7 ) is located on the housing ( 1 ), wherein the circuit control system controls operations of the transmission system, and the transmission system controls flipping of the front automatic flipping lenses ( 2 ). The head-worn automatic flipping eyewear can be worn on the head for training, and the lenses are automatically flipped up or down, such that holding the lenses with a hand or manually flipping the lenses is unnecessary. Thereby, integration of the training via lens flipping with reading and writing is facilitated, and long-term persistent training can be achieved to obtain a good result.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    The present invention relates generally to the field of eye care, and more particularly to head wear type automatic flip glasses. 
         [0002]    In China, more and more people are suffering from myopia, and patients tend to become younger and younger. Owing to the fact that myopia has caused great inconvenience for people&#39;s daily life, many eye-care devices have been invented in order to improve people&#39;s eyesight. Among those devices, flipping lenses are one of the simplest and most effective ones. It consists of four butterfly-shaped lenses scattering around two sides of a shaft, with two positive lenses on one side and two negative lenses of the same degree on the other. When the shaft is flipped, the positive lenses and the negative lenses will be exchanged. During that process, the user&#39;s eyes are forced to switch between accommodation and relaxation. And the switch is helpful to improve the speed of accommodation, increase the amplitude of accommodation, speed up reading rate, upgrade visual clarity, make eyes more comfortable, and prevent myopia, vision degeneration and asthenopia caused by lag of accommodation and insufficient accommodation. 
         [0003]    However, currently available flipping lenses, no matter manufactured at home or abroad, have the following limitations: 
         [0004]    1. Flipping lenses are all hand-held type. Users are required to hold them in front of their eyes. Therefore, it&#39;s labor-consuming. 
         [0005]    2. No timing function. Users are required to flip at a frequency of 8 to 20 times per minute. Meanwhile, they should keep their eyes focusing on the E mark which is 40 cm away. Because of the inconvenience, few students can persist in such training. Therefore the effects are undesirable. 
         [0006]    3. Due to different flipping frequencies caused by manual operation, the training effects vary among different users. Uniform training effects can hardly be achieved. 
       BRIEF SUMMARY OF THE INVENTION 
       [0007]    For those reasons mentioned above, it is necessary to provide head wear type automatic flip glasses. 
         [0008]    Head wear type automatic flip glasses include a housing, front automatic flipping lenses, rear fixing lenses, a transmission system, a circuit control system and a head fixing member. The front automatic flipping lenses are connected with the housing in a flipping manner, whereas the rear fixing lenses are in fixed connection with the housing. The front automatic flipping lenses are located in front of the rear fixing lenses. The transmission system and the circuit control system are located in the housing. The head fixing member is located on the housing. The transmission system is driven by the circuit control system. And the transmission system is used for controlling the front automatic flipping lenses to flip. 
         [0009]    Optimally, the housing includes a front housing and a rear housing; the front automatic flipping lenses are connected with the front housing or rear housing in a flipping manner; and the rear fixing lenses are in fixed connection with the rear housing. 
         [0010]    More optimally, the front automatic flipping lenses are connected with the front housing or the rear housing in a flipping manner through a flipping structure. The flipping structure includes a fixing clamp and a fixing sleeve. The fixing clamp includes two side boards with through-holes. The fixing sleeve has a central hole at the middle part. The fixing sleeve is located between the two side boards of the fixing clamp. The central hole corresponds to the through-holes of the side boards. The fixing clamp is located on the front housing or the rear housing. And the fixing sleeve is located on the flipping lens frame of the front automatic flipping lenses. 
         [0011]    Further optimally, the rear housing includes a rear-housing middle-transverse portion. There are two flipping structures, with one being two fixing sleeves configured on the left and right frame of the front automatic flipping lenses respectively, and the other being two corresponding fixing clamps disposed on the rear-housing middle-transverse portion. 
         [0012]    More optimally, the rear housing includes a rear-housing middle-transverse portion. The upper part of the flipping lens frame of the rear fixing lenses is the lower edge of the rear-housing middle-transverse portion, or the upper part of the flipping lens frame of the rear fixing lenses is fixed at the lower edge of the rear-housing middle-transverse portion. 
         [0013]    Optimally, the transmission system is comprised of a worm gear, a helical gear, a short iron shaft, a forced-braking protection structure and a long iron shaft. The worm gear is meshed with the helical gear. The central hole of the helical gear is connected with one end of the short iron shaft, while the other end of the short iron shaft is connected with the long iron shaft through the forced-braking protection structure. And the long iron shaft is connected with the flipping structure. With regard to the forced-braking protection structure, it is an elastic pipe or a clutch device. 
         [0014]    More optimally, the elastic pipe is a silica gel pipe or a rubber pipe, and the clutch device is a spring clip. 
         [0015]    Optimally, the circuit control system is composed of a motor, a circuit control PCB and a battery. The motor is connected with the transmission system. The circuit control PCB controls the rotation of the motor. And the battery supplies power to the circuit control PCB. There is a functional chip on the circuit control PCB. And the functional chip consists of a timing module and/or a flipping frequency adjusting module. 
         [0016]    Optimally, the circuit control PCB is provided with at least one of a charging plug, a charging protection circuit, a motor driving IC, a power button and an indicator light. 
         [0017]    Optimally, a hollow cavity formed by the front housing and the rear housing includes a middle cavity and two lateral cavities. The circuit control PCB is located in the middle cavity, namely between the front-housing middle-transverse portion and the rear-housing middle-transverse portion; while the transmission system and the motor are located in one lateral cavity, and the battery is located in the other. 
         [0018]    Optimally, the degrees of the front automatic flipping lenses and the rear fixing lenses depend on the myopia degree of the wearer and the selected adjustment training strength/amplitude. The algorithm is as follows: 
         [0000]      degree of the front automatic flipping lenses=myopia degree of the wearer+(− X ),
 
         [0000]      degree of the rear fixing lenses=myopia degree of the wearer+(+ X ), 
         [0019]    X is the selected adjustment training strength/amplitude which ranges from 0.5D, 1.0D, 1.5D, 2.0D, and 2.5D to 3.0D. 
         [0020]    Optimally, the rear fixing flipping lens frame is provided with a nose support. And the back face of the rear housing is provided with a sponge mat. 
         [0021]    Optimally, the head fixing member is an elastic cord or tie ropes. 
         [0022]    More optimally, the left and right sides of the front housing or rear housing are provided with a retaining ring respectively. Two bent hooks are provided respectively on both ends of the elastic cord, with one being fixed at one retaining ring, the other being in detachable connection with the other retaining ring. Two tie ropes are provided, and the left and right sides of the front housing or rear housing respectively fixes one end of one of the tie ropes. 
         [0023]    Optimally, the housing is n-shaped, and the front automatic flipping lenses and the rear fixing lenses are located in the n-shaped housing. 
         [0024]    Compared with the currently available technologies, the head wear type automatic flip glasses of the present invention has the following beneficial effects: 
         [0025]    1. The head wear type automatic flip glasses of the present invention looks more like normal glasses, and can be worn on the head to perform training. The front automatic flipping lenses flip automatically. So there&#39;s no need for hand-holding or manual flipping. That contributes to the integration of the flip training with reading and writing. Hence, it&#39;s more helpful for persistent training, which can predict better training effects. 
         [0026]    2. The head wear type automatic flip glasses of the present invention can be used for amblyopia treatment, vision improvement training, and myopia prevention. It can improve the visual sensitivity significantly and can prevent and control myopia, which may be caused in amblyopia treatment effectively. 
         [0027]    3. The head wear type automatic flip glasses of the present invention are provided with a flipping frequency adjusting module. Users can adjust the flipping frequency according to their own needs. And it is also provided with a timing module which can be used to set the training duration. So there&#39;s no need for users to time the training. It&#39;s more user-friendly. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0028]      FIG. 1  is an exploded structural view of the head wear type automatic flip glasses of the present invention. 
           [0029]      FIG. 2  is a front view of the head wear type automatic flip glasses of the present invention. 
           [0030]      FIG. 3  is a cross-sectional view of  FIG. 3  in A-A direction. 
           [0031]      FIG. 4  is a cross-sectional view of  FIG. 3  in B-B direction. 
           [0032]      FIG. 5  is a rear view of the head wear type automatic flip glasses of the present invention. 
           [0033]      FIG. 6  is a structural view of a circuit control PCB. 
       
    
    
       [0034]    Marks in Figures:  1 . housing;  2 . front automatic flipping lenses;  3 . rear fixing lenses;  11 . front housing;  12 . rear housing;  111 . decorative strip;  112 . decorative strip slot;  121 . rear-housing middle-transverse portion;  21 . front automatic flipping lens frame;  22  front flipping lenses;  23 . cushion;  31 . rear fixing flipping lens frame;  32 . rear flipping lenses;  41 . worm gear;  42 . helical gear;  43 . short iron shaft;  44 . forced-braking protection structure;  45 . long iron shaft;  51 . motor;  52 . circuit control PCB;  53 . battery;  521 . functional chip;  522 . charging plug;  523 . motor drive IC;  524 . power button;  525 . indicator light;  61 . fixing clamp;  62 . fixing sleeve;  7 . tie rope;  81 . nose support;  82 . sponge mat. 
       DETAILED DESCRIPTION OF THE INVENTION 
       [0035]    In order to explain the present invention better, further illustrations together with Figures and embodiments will be provided as follows. 
         [0036]    As shown in  FIGS. 1 and 2 , head wear type automatic flip glasses of the present invention includes a housing  1 , front automatic flipping lenses  2 , rear fixing lenses  3 , a transmission system, a circuit control system and a head fixing member  7 . The front automatic flipping lenses  2  are connected with the housing  1  in a flipping way, whereas the rear fixing lenses  3  are in fixed connection with the housing  1 . The transmission system and the circuit control system are located in the housing  1 . 
         [0037]    Optimally, the housing  1  includes a front housing  11  and a rear housing  12 . Both of the front housing  11  and the rear housing  12  include a middle-transverse portion and a left portion and a right portion which are located at two ends of the middle-transverse portion. In other words, the front housing  11  includes a front-housing middle-transverse portion and a front-housing right portion and a front-housing left portion which are located on two sides of the front-housing middle-transverse portion, while the rear housing  12  includes a rear-housing middle-transverse portion  121 , and a rear-housing left portion and a rear-housing right portion which are located at two ends of the rear-housing middle-transverse portion  121 . The housing is overall n-shaped. The front automatic flipping lenses  2  and the rear fixing lenses  3  are located in the n-shaped housing. 
         [0038]    Optimally, the front automatic flipping lenses  2  include a front automatic flipping lens frame  21  and two front flipping lenses  22  embedded in the front automatic flipping lens frame  21 . The front automatic flipping lens frame  21  includes a left front lens frame, a right front lens frame and a connecting structure between the left and right front lens frames. The connecting structure connects the left and right front lens frames together. When the front automatic flipping lenses  2  are flipping, the left and right front lens frames flip synchronously. The front automatic flipping lens frame  21  can be made from any current materials suitable for manufacturing the flipping lens frame. A cushion  23  is disposed between the front automatic flipping lens frame  21  and the fixing sleeve  62 . A silica gel cushion is the optimal choice. The cushion  23  can reduce the vibration of the front automatic flipping lens frame during flipping, and then reduce the shake of the front flipping lenses and keep them stable. 
         [0039]    Optimally, the rear fixing lenses  3  include a rear fixing flipping lens frame  31  and two rear flipping lenses  32  embedded in the rear fixing flipping lens frame  31 . The upper part of the rear fixing flipping lens frame  31  is fixed with the housing. The rear fixing flipping lens frame  31  can be made from any current available materials suitable for manufacture. Due to features of the flipping lens frame such as strength and hardness, fixing of the lower part of the rear fixing flipping lens frame  31  is not required. Optimally, the rear fixing lenses  3  are fixedly connected with the rear housing  12 . In one embodiment, the upper part of the rear fixing flipping lens frame  31  is the lower edge of the rear-housing middle-transverse portion  121 . In other words, the upper part of the rear fixing flipping lens frame  31  is directly integrated with the lower part of the rear-housing middle-transverse portion  121 . In another embodiment, the upper part of the rear fixing flipping lens frame  31  is fixed at the lower edge of the rear-housing middle-transverse portion  121  by a fastener. 
         [0040]    Optimally, the front automatic flipping lenses  2  are connected with the front housing  11  or the rear housing  12  in a flipping way. The housing  1  is provided with corresponding openings at positions in connection with the front automatic flipping lenses  2 . That facilitates the front automatic flipping lenses  2 ′ flipping. The front automatic flipping lenses  2  are connected with the front housing  11  or the rear housing  12  in a flipping way through a flipping structure. The flipping structure includes a fixing clamp  61  and a fixing sleeve  62 . The fixing clamp  61  includes two side boards with through-holes. The fixing sleeve  62  has a central hole at the middle part. The fixing sleeve  62  is located between the two side boards of the fixing clamp  61 . The central hole corresponds to the through-holes of the side boards. The fixing clamp  61  is located on the front housing  11  or the rear housing  12 . And the fixing sleeve  62  is located on the front automatic flipping lens frame  21 . 
         [0041]    As shown in  FIG. 1  and  FIG. 4 , in one embodiment, the front automatic flipping lenses  2  are connected with the rear-housing middle-transverse portion  121  in a flipping way through the flipping structure. The fixing clamp  61  is located at the lower part of the rear-housing middle-transverse portion  121 , and extends beyond the front housing  11 . And the fixing sleeve  62  is located above the flipping lens frame of the front automatic flipping lenses  2 . In another embodiment, the fixing clamp  61  is disposed at the front-housing middle-transverse portion in the middle cavity. More optimally, there are two flipping structures; the left front lens frame and the right lens frame are respectively provided with a fixing sleeve  62 ; and the rear-housing middle-transverse portion  121  or the front-housing middle-transverse portion is provided with two fixing clamps  61 . 
         [0042]    Optimally, as shown in  FIG. 1  and  FIG. 3 , the transmission system is comprised of a worm gear  41 , a helical gear  42 , a short iron shaft  43 , a forced-braking protection structure  44  and a long iron shaft  45 ; the worm gear  41  is meshed with the helical gear  42 ; the central hole of the helical gear  42  is connected with one end of the short iron shaft  43 ; the other end of the short iron shaft  43  is connected with the long iron shaft  45  through the forced-braking protection structure  44 ; and the long iron shaft  45  is connected with the front automatic flipping lenses  2 . Optimally, the forced-braking protection structure  44  has a function of driving the long iron shaft or short iron shaft to slip or idle at the position of the forced-braking protection structure  44 , which includes an elastic pipe or a clutch device. More optimally, the elastic pipe is a silica gel pipe or a rubber pipe, and the clutch device is a spring clip. Without the forced-braking protection structure  44 , the central hole of the helical gear  42  is connected with one end of an iron shaft, and the iron shaft is connected with the front automatic flipping lenses  2 . In use, if a user flips the front automatic flipping lenses  2  with hands, the iron shaft will receive a large resistance when driving the front automatic flipping lenses  2  to flip, and then the motor  51  or the drive gear will be damaged. In one embodiment of the present invention, the forced-braking protection structure  44  is used; the short iron shaft  43  is closely connected with the forced-braking protection structure  44 ; if the long iron shaft  45  receives a strong resistance when driving the front automatic flipping lenses  2  to flip, the front automatic flipping lenses  2  will not flip, but the long iron shaft will slip or idle at the position of the forced-braking protection structure, while the motor  51  and the drive gear are in normal operation. Thus, damages to the motor  51  and the drive gear can be avoided. 
         [0043]    Optimally, the circuit control system is comprised of the motor  51 , a circuit control PCB  52  and a battery  53 . The shaft of the motor  51  is embedded into the central hole of the worm gear  41 . The circuit control PCB  52  controls rotation of the motor  51 . The battery  53  supplies power to the circuit control PCB  52 . The circuit control PCB  52  controls the operation of the motor  51 . The worm gear  41  rotates to drive the helical gear  42  to rotate and to further drive the short iron shaft  43 , the forced-braking protection structure  44  and the long iron shaft  45  to rotate, realizing the flip of the front automatic flipping lenses  2 . 
         [0044]    As shown in  FIG. 6 , the circuit control PCB  52  is provided with a functional chip  521 . The circuit control PCB  52  can be also provided with at least one of a charging plug  522 , a motor drive IC  523 , a power button  524  and an indicator light  525 . The circuit control PCB  52  can also be provided with a charging protection circuit which plays a protection role in the charging process. The functional chip  521  is comprised of a timing module and/or a flipping frequency adjusting module. The timing module is used for controlling the training time, and the flipping frequency adjusting module is used for adjusting the flipping frequency of the front automatic flipping lenses. The charging plug  522  is used for charging the battery  53 . The housing is correspondingly provided with an interface in connection with the charging plug  522 , and the interface is optimally disposed at the joint of the front housing and the rear housing. In one embodiment, the charging plug  522  is located in the center of the top of the circuit control PCB  52 . And the interface is disposed on the top of the housing  1 , with one half located on the top of the front housing  11  and the other on the top of the rear housing  12 . The two halves together form a complete interface. 
         [0045]    The motor drive IC  523  is used for driving the motor  51  to run. The power button  524  is used for switching on and off the circuit control system. The indicator light  525  is used for indicating the working status of the circuit control system. When the power button  524  is on, the circuit control system is in the working status, and the indicator light  525  is electrified and lit; when the power button  524  is off, the circuit control system is not in the working status, and the indicator light loses power supply and turns off. There are openings at positions corresponding to the power button  524  and the indicator light  525  on the housing  1 . So the power button  524  and the indicator light  525  are exposed outside the housing for the convenience of operation and observation. 
         [0046]    Optimally, the front housing  11  and the rear housing  12  are fixed together through screws, and the cavity formed by the front housing and rear housing is divided into one middle cavity and two lateral cavities. The circuit control PCB  52  is located in the middle cavity, namely between the front-housing middle-transverse portion and the rear-housing middle-transverse portion  121 ; the transmission system and the motor  51  are located in one lateral cavity, and the battery  53  is located in the other. 
         [0047]    Optimally, the degrees of the front automatic flipping lenses  2  and the rear fixing lenses  3  depend on the myopia degree of the wearer and the selected adjustment and training strength/amplitude (X). The algorithm is as follows: 
         [0000]      degree of the front automatic flipping lenses=myopia degree of the wearer+(− X ),
 
         [0000]      degree of the rear fixing lenses=myopia degree of the wearer+(+ X ), 
         [0048]    X is any one of 0.5D, 1.0D, 1.5D, 2.0D, 2.5D and 3.0D. 
         [0049]    Optimally, the head fixing member  7  is used for fixing the head wear type automatic flip glasses on the head of a person. The head fixing member  7  is located on the left and right side portions of the front housing  11  or rear housing  12 , optimally on the left and right portions of the rear housing. In one embodiment of the present invention, the head fixing member  7  may be two tie ropes; the rear-housing left portion and rear-housing right portion are respectively used for fixing one end of one tie rope, and then the untied ends of the ropes are tied together. In that way, the head wear type automatic flip glasses of the present invention is fixed on the head of a person. In another embodiment, the head fixing member  7  is an elastic cord; the rear-housing left portion and rear-housing right portion have a retaining ring respectively. Two bent hooks are provided respectively on both ends of the elastic cord. A person can fix the head wear type automatic flip glasses of the present invention on his/her head by fastening the retaining ring and the bent hook. More optimally, the retaining ring on one side is fixed together with the bent hook, so a person can wear the head wear type automatic flip glasses of the present invention on his/her head firmly or remove the glasses from his/her head easily simply by fastening the retaining ring and the bent hook on the other side together or unfastening the two. 
         [0050]    Optimally, the front flipping lenses  22  are pasted with red films for improving visual sensitivity and strengthening amblyopia improvement training. To achieve a beautiful appearance, the front housing  11  is provided with a decorative strip  111 , and the decorative strip  111  is disposed in a decorative strip slot  112  at the front-housing middle-transverse portion. In order to improve the comfortableness of using the head wear type automatic flip glasses of the present invention, the rear fixing flipping lens frame is provided with a nose support  81 ; optimally, the nose support  81  is a silica gel nose support; and the back face of the rear-housing middle-transverse portion is provided with a sponge mat  82 . The nose support  81  corresponds to the nose of a person. The sponge mat  82  corresponds to the forehead of a person. The nose support  81  and the sponge mat  82  are made from flexible and elastic materials. That can make users feel more comfortable. Users will not feel tied even if they wear the head wear type automatic flip glasses of the present invention for a long time. 
         [0051]    When using, a person wears the head wear type automatic flip glasses of the present invention on the head. The head wear type automatic flip glasses are fixed on the head by using the head fixing member  7 . Press the power button  524 , and then the front automatic flipping lenses  2  can flip automatically at a certain frequency for a certain time. The user can adjust the flipping frequency and set the service time according to his/her needs. After use, unfasten the head fixing member  7  to remove the head wear type automatic flip glasses of the present invention from the head. The head wear type automatic flip glasses of the present invention can be used for amblyopia treatment and vision improvement training. It can prevent and control myopia which may be caused during amblyopia treatment effectively. 
         [0052]    The foregoing descriptions of several embodiments of the invention have been presented for purposes of illustration and description. However, they are not intended to be exhaustive or to limit the invention to the precise forms disclosed. For those practitioners skilled in this field, some variations and modifications can be made on the basis of the concept of the present invention. It should be noted that all those variations and modifications shall fall within the protective scope of the present invention. Therefore, it is intended that the protective scope of the present invention be defined by the following claims and their equivalents.