Abstract:
An electronic device with extendable strap and different communication modes depending on the state of the strap comprises a shell, at least one rotating mechanism, a strap, a sensor, and a processor. The shell defines at least one first receiving cavity, the rotating mechanism is received in the first receiving cavity. One end of the strap is wound on the at least one rotating mechanism. The rotating mechanism is able to rotate and store spring force under a driving of the strap. The sensor communicates with the processor to determine the state of the strap according to a rotation direction of the rotating mechanism and thus determine whether the strap is retracted to allow touch screen input by a user, or extended to switch to voice communication with the user.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application claims priority to Chinese Patent Application No. 201610144675.2 filed on Mar. 15, 2016, the contents of which are incorporated by reference herein. 
       FIELD 
       [0002]    The subject matter herein generally relates to a suspension device and an electronic device using the same. 
       BACKGROUND 
       [0003]    Smart phone is popular. However, when holding and focusing on smart phone, the surrounding environment can be ignored, causing danger to people. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0004]    Implementations of the present technology will now be described, by way of example only, with reference to the attached figures. 
           [0005]      FIG. 1  is an isometric view showing an exemplary embodiment of a suspension device. 
           [0006]      FIG. 2  is an exploded view showing the suspension device of  FIG. 1 . 
           [0007]      FIG. 3  is a sectional view of the suspension device of  FIG. 1  along the III-III line. 
           [0008]      FIG. 4  is an isometric view showing an exemplary embodiment of a rotating mechanism of the suspension device. 
           [0009]      FIG. 5  is an isometric view showing an exemplary embodiment of the suspension device when suspended. 
           [0010]      FIG. 6  is a block diagram showing an exemplary embodiment of an electronic device using the suspension device. 
       
    
    
     DETAILED DESCRIPTION 
       [0011]    It will be appreciated that for simplicity and clarity of illustration, where appropriate, reference numerals have been repeated among the different figures to indicate corresponding or analogous elements. In addition, numerous specific details are set forth in order to provide a thorough understanding of the embodiments described herein. However, it will be understood by those of ordinary skill in the art that the embodiments described herein can be practiced without these specific details. In other instances, methods, procedures, and components have not been described in detail so as not to obscure the related relevant feature being described. The drawings are not necessarily to scale and the proportions of certain parts may be exaggerated to better illustrate details and features. The description is not to be considered as limiting the scope of the embodiments described herein. 
         [0012]    The term “comprising” indicates “including, but not necessarily limited to”; it specifically indicates open-ended inclusion or membership in a so-described combination, group, series and the like. 
         [0013]    Embodiments of the present disclosure will be described in relation to the accompanying drawings. 
         [0014]      FIG. 1  illustrates an exemplary embodiment of a suspension device  100 . The suspension device  100  is used to carry an object, such as an electronic device.  FIG. 2  illustrates an exploded view of the suspension device  100  of  FIG. 1 . The suspension device  100  includes a shell  10 , a strap  20 , and at least one rotating mechanism  30 . The shell  10  defines at least one first receiving cavity  11  therein. The first receiving cavity  11  is used to receive the rotating mechanism  30 . The at least one first receiving cavity  11  has a first hole  111 . The first hole  111  is set in a side wall of the first receiving cavity  11 . The strap  20  is able to pass through the side wall of the first receiving cavity  11  via the first hole  111 . A first opening  12  is also set on the side wall of the first receiving cavity  11 . The strap  20  passes through the first opening  12  and is exposed in the first opening  12 , for convenient use of the strap  20 . 
         [0015]    One end of the strap  20  is wound on the rotating mechanism  30 , the other end of the strap  20  passes through the first hole  111  and the first opening  12  to connect with the shell  10 . When pulled, the strap  20  is able to drive the rotating mechanism  30  to rotate thus releasing the full length of the strap  20 . 
         [0016]    In at least one embodiment, the number of first receiving cavities  11  and rotating mechanisms  30  is two. Each rotating mechanism  30  is received in one first receiving cavity  11 . One end of the strap  20  is wound on one rotating mechanism  30 , and the other end, opposite to the aforesaid end, of the strap  20  is wound on another rotating mechanism  30 . Initially, the strap  20  is received in the suspension device  100 . When the strap  20  is stretched out of the suspension device  100  or is retracted, rotating directions of the two rotating mechanisms  30  are opposite to each other. 
         [0017]    When pulled out, the strap  20  drives the rotating mechanisms  30  to jointly rotate, and store energy. When no longer pulled, the rotating mechanisms  30  release the energy and retract the strap  20  to its initial state. 
         [0018]    The rotating mechanism  30  includes a coil spring  31  and a shaft  32 . The shaft  32  is defined in the first receiving cavity  11 . A first end of the coil spring  31  is fixed on the shaft  32  and the coil spring  31  is wound on the shaft  32 . The second end of the coil spring  31  is connected with one end of the strap  20  and the strap  20  is wound on the coil spring  31 . 
         [0019]      FIG. 4  illustrates the rotating mechanism  30  of the suspension device  100 . In the present exemplary embodiment, the first end of the coil spring  31  is flat (hereinafter, this portion of spring  31  is “sheet metal  311 ”). The shaft  32  defines a second opening  321 . The sheet metal  311  is received in the second opening  321 . The coil spring  31  passes through the second opening  321  and is wound on the shaft  32 . The second end of the coil spring  31  defines a third hole  312 . The two ends of the strap  20  each defines a buckle  21  (referring to  FIG. 2 ). The buckles  21  of the strap  20  are secured to the third hole  312  of each of the coil springs  31 , thus causing the strap  20  to connect to the second end of each of the coil springs  31 . In at least one embodiment, the buckle  21  is a hard rod. The process of the buckle  21  being secured in the third hole  312  is that, as the strap  20  is soft material, the strap  20  first passes along a first direction. The buckle  21  is attached to the third hole  312  along a second direction perpendicular to the first direction. In another embodiment, the first end of the coil spring  31  defines a convex block (not shown), and the shaft  32  defines a receiving hole (not shown) and the second opening  321 . The receiving hole is connected to the second opening  321 . The diameter of the receiving hole is slightly greater than the diameter of the convex block, and the diameter of the second opening  321  is less than the diameter of the convex block. The convex block is received and bound in the receiving hole. The coil spring  31  passes through the second opening  321  and is wound on the shaft  32 . 
         [0020]    The rotating mechanism  30  further includes a coil spring cover  33 . The coil spring cover  33  is a hollow cylindrical body. The coil spring cover  33  includes a top part  333  and a side wall  334 . The side wall  334  vertically extends from the top part  333 . The top part  333  of the coil spring cover  33  defines a fourth hole  331 . The side wall  334  of the coil spring cover  33  defines a third opening  332 . The shaft  32  passes through the fourth hole  331 . The coil spring cover  33  covers the coil spring  31 . The strap  20  is wound on the coil spring  31  and passes through the coil spring cover  33  via the third opening  332 . 
         [0021]    The shell  10  defines a limiting groove  13 . The limiting groove  13  is located between the first hole  111  and the first opening  12 . The limiting groove  13  receives the strap  20  and restricts the moving direction of the strap  20 . In at least one embodiment, the shell  10  includes a bottom part  101 , a top part  102  opposite to the bottom part  101  and two side walls  103  located between the bottom part  101  and the top part  102 , as shown in  FIG. 3 . The two first receiving cavities  11  are set on top sides of the bottom part  101  of the shell  10 . The first opening  12  is set on the top part  102  of the shell  10 . The limiting groove  13  is located between two side walls  102  of the shell  10 , by which the first receiving cavity  11  is connected to the first opening  12 . 
         [0022]    A limiting mechanism  40  is defined in the first opening  12 . The limiting mechanism is used to limit the extent or amount of the strap  20  passing through the first opening  12 . The limiting mechanism  40  includes a limiting block  41  and an elastic sheet  42 . The limiting block  41  defines a receiving slot  411  and a second hole  412 . The second hole  412  is set on the first side wall of the receiving slot  411 . The elastic sheet  42  is received in the receiving slot  411 . The strap  20  passes through the receiving slot  411  and is resisted on the inner wall of the receiving slot  411  by the elastic sheet  42 . Both the elastic sheet  42  and the strap  20  are partially located outside of the second hole  412 , which is convenient for a user to operate. In at least one embodiment, the elastic sheet  42  has a “W” shaped symmetrical structure. The second side wall of the receiving slot  411  defines a raised part  4111 . The raised part  4111  is used to support the elastic sheet  42  and make the elastic sheet  42  stretch out of the second hole  412 . 
         [0023]    When a user presses on the elastic sheet  42  through the second hole  412 , the elastic sheet  42  is compressed and a gap appears between the elastic sheet  42  and the receiving slot  411 . When the user pulls the strap  20 , the coil spring  31  is driven to jointly rotate by the strap  20  and to store energy. The strap  20  is released as required, thus the user can conveniently support the suspension device  100 .  FIG. 5  illustrates an embodiment of the suspension device  100  when suspended. When the user pulls the strap  20  to an appropriate length and releases the elastic sheet  42 , the elastic sheet  42  again resists on the inner wall of the receiving slot  411 , thus the strap  20  is limited between the elastic sheet  42  and the receiving slot  411 . The strap  20  fails to be pulled by a user and to be wound on the coil spring  31 . Therefore, the suspension device  100  is able to restrict the length of the strap  20  to a length desired by user. The suspension device  100  can thus be hung around the user&#39;s neck or user&#39;s wrist. When the strap  20  stretches out the second hole  412  and the user presses on the elastic sheet  42 , the coil spring  31  releases the stored energy and rewinds on the shaft  32  under the elastic force of the coil spring  31 . 
         [0024]    Referring to  FIG. 2 , the suspension device  100  includes a cover  50 . The cover  50  covers the shell  10 . 
         [0025]      FIG. 6  illustrates a block diagram showing an exemplary embodiment of an electronic device  200 . In at least one embodiment, the electronic device  200  can be a smart phone or a tablet, for example. The electronic device  200  includes a sensor  60  and a processor  70 . The shell  10  also defines a second receiving cavity  14  and a third receiving cavity  15 , as shown in  FIG. 2 . Referring to  FIG. 2 , the third receiving cavity  15  is located between the two first receiving cavities  11 . The third receiving cavity  15  is used to receive the sensor  60 . The second receiving cavity  14  connects to the third receiving cavity  15  and the two first receiving cavity  11  and is used to receive some internal components of the electronic device  200 , such as a battery and the processor  70 . In another embodiment, the second receiving cavity  14  is used to receive the electronic device  200 . The sensor  60  is used to sense the state of the strap  20 . In at least one embodiment, the sensor  60  determines the state of the strap  20  according to the rotation direction of the coil spring  31 . When the sensor  60  detects that the left hand coil spring  31  rotating along the counterclockwise and the right hand coil spring  31  rotating clockwise, the sensor  60  determines the strap  20  as being pulled. Conversely, when the sensor  60  detects the left hand coil spring  31  rotating clockwise and the right hand coil spring  31  rotating counterclockwise, the sensor  60  determines the strap  20  as being in a retracting state. 
         [0026]    In at least one embodiment, the shell  10  is a protective shell to protect the electronic device  200 . The sensor  60  communicates with the electronic device  200  and sends data as to the state of the strap  20  to the electronic device  200 . When receiving the state of the strap  20 , the electronic device  200  switches input mode according to the state of the strap  20 . The communication between the sensor  60  and the electronic device  200  can be by cable or wirelessly. 
         [0027]    The shell  10  can be a housing of the electronic device  200 . The cover  50  can be a display of the electronic device  200 . The sensor  60  communicates with the processor  70  and sends data as to the state of the strap  20  to the processor  70 . The processor  70  changes the input mode of the electronic device  200  according to the state of the strap  20 . The processor  70  can be a central processing unit (CPU), a microprocessor, or other data processor chip that performs functions for changing the input mode. 
         [0028]    The processor  70  of the electronic device  200  can change the input mode in certain ways. When the strap  20  is in the tensile state, the user is deemed to be busy and has no spare time to view the electronic device  200 . In this situation, the processor  70  changes the input mode of the electronic device  200  to a full speech mode. The full speech mode of the electronic device  200  allows the user to communicate with the electronic device  200  by spoken words. In at least one embodiment, a user can input speech, and listen to output responses, by a wired headset or BLUETOOTH headset. When the strap  20  is in the shrinkage state, the user is assumed to require to view the electronic device  200 , the processor  70  changes the input mode of the electronic device  200  from the full speech mode to a character input mode. 
         [0029]    The electronic device  200  being in the full speech mode makes the user communicate with the electronic device  200  by speech, thus allowing the user to be become hands free. 
         [0030]    The embodiments shown and described above are only examples. Even though numerous characteristics and advantages of the present technology have been set forth in the foregoing description, together with details of the structure and function of the present disclosure, the disclosure is illustrative only, and changes may be made in the detail, including in matters of shape, size and arrangement of the parts within the principles of the present disclosure, up to and including the full extent established by the broad general meaning of the terms used in the claims.