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A protection case for receiving an electronic device. The protection case includes a receiving body for receiving the electronic device, a pair of winding mechanisms correspondingly set at two opposite sides of the receiving body, and a pair of belts correspondingly being wound on the winding mechan

A protection case for receiving an electronic device. The protection case includes a receiving body for receiving the electronic device, a pair of winding mechanisms correspondingly set at two opposite sides of the receiving body, and a pair of belts correspondingly being wound on the winding mechanisms. The belts extend retractably out from the winding mechanisms to fasten the receiving body to a user.

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1. A protection case for receiving an electronic device, the protection case comprising: a receiving body for receiving the electronic device;a pair of winding mechanisms correspondingly set at two opposite sides of the receiving body; anda pair of belts correspondingly being wound on the winding me

1. A protection case for receiving an electronic device, the protection case comprising: a receiving body for receiving the electronic device;a pair of winding mechanisms correspondingly set at two opposite sides of the receiving body; anda pair of belts correspondingly being wound on the winding mechanisms, wherein each of the pair of belts comprises a wide section and a narrow section, a width of the wide section is greater than a width of the narrow section, the narrow section is connected to a middle of an end of the wide section, and each of the pair of belts is wrapped on the winding mechanism with the narrow section first wrapped on the winding mechanism;wherein the belts extend from the winding mechanisms to fasten the receiving body to a user, the receiving body comprises a top board, a bottom board parallel to the top board, an inner wall, and a side wall perpendicularly connected to the top board and the bottom board, the top board, the bottom board, a portion of the side wall, and the inner wall cooperately define the receiving body, the receiving body comprises a pair of receiving grooves adjacent to two opposite sides of the side wall, and a receiving cavity located between the pair of receiving grooves, the winding mechanisms are correspondingly accommodated in the receiving grooves, each of the winding mechanisms comprises a pair of supporting posts fastened to a lower surface of the receiving groove, a holding rod, a winder, and a pair of resilient pieces, two opposite ends of the holding rod are correspondingly connected to the top ends of the supporting posts, the winder is rotatably sleeved on the holding rod, and the resilient pieces connect two ends of the winder with two corresponding ends of the holding post to provide a restoring force to the winder, the belt is wound on the winder. 2. The protection case of claim 1, wherein the winder comprises a pair of positioning sections and a holding section located between the pair of positioning sections, the winder defines a plurality of evenly spaced positioning recesses in a circumferential surface of each positioning section along an axial direction of the winder. 3. The protection case of claim 2, wherein the radius of the positioning section is greater than the radius of the holding section. 4. The protection case of claim 2, wherein the winder defines a second fastening hole in an outer end surface of each positioning section away from the holding section, the holding rod defines a first fastening hole in each of two opposite end surfaces along a longitudinal direction of the holding rod, the resilient pieces are correspondingly sleeved on the holding rod from two opposite ends of the holding rod, the winder is located between the pair of resilient pieces, two opposite ends of each resilient pieces is correspondingly connected to the first fastening hole and the second fastening hole. 5. The protection case of claim 2, wherein each of the winding mechanisms further comprises a pair of positioning assemblies correspondingly received in a pair of positioning through holes extending through the inner wall and communicating the receiving cavity and the receiving groove, the pair of positioning assemblies correspondingly engage with the positioning recesses to position the rotation of the winder. 6. The protection case of claim 5, wherein each of the positioning assemblies comprises a spring, a positioning block, a fastening bolt, the positioning block and the fastening bolt are correspondingly connected to two opposite ends of the spring, an opening of each positioning through hole defined on an inner side surface of the receiving groove is aligned with the positioning section, the positioning blocks extend retractably out of the positioning through hole via the opening and insert into the positioning recesses to position the winder. 7. The protection case of claim 1, wherein each of the winding mechanism further comprises a pair of covers for correspondingly covering a pair of openings of the pair of receiving grooves, a pair of first peripheries are formed between the opening and a top surface of the top board or a bottom surface of the bottom board, a pair of second peripheries are formed in the second part and perpendicularly connected to the first peripheries, each of the covers comprises a pair of parallel third peripheries, a pair of fourth peripheries perpendicularly connected to the third peripheries, an inner side surface, and a outer side surface, the cover is pivotally connected to the lower first periphery via a rotating projection extending out from the lower third periphery. 8. The protection case of claim 7, wherein a fastening recess is defined in a side of each second periphery which is close to the top board, each of the covers comprises a pair of positioning protrusions correspondingly extending out from a place on each of the fourth peripheries close to the upper third periphery, the fastening protrusions correspondingly inserted into the fastening recesses when the covers are closed to the opening of the receiving grooves to fasten the covers to the receiving body. 9. The protection case of claim 7, wherein a first cutout is defined in the upper first periphery and communicates with the receiving groove, each of the covers defines a second cutout at a middle of the upper third periphery, the second cutout is aligned with the first cutout when the cover is closed to the opening of the receiving grooves. 10. The protection case of claim 8, wherein the winding mechanism further comprises a stretchable arm, the stretchable arm comprises a first connecting rod and a second connecting rod pivotally connected to the second connecting rod via a pivot, an end of the first connecting rod opposite to the second connecting rod is pivotally connected to the inner wall, an end of the second connecting rod opposite to the first connecting rod is pivotally connected to inner side surface of the cover. 11. The protection case of claim 10, wherein the second connecting rod comprises a brake formed at an end of the second connecting rod to which the first connecting rod is connected, a braking block is assembled on the brake, when the cover is closed to the opening of the receiving body, the brake is driven to press on the winder to fasten the belts. 12. The protection case of claim 7, wherein the cover defines a belt exit at a place on the inner side surface close to the lower third periphery, the belts are extended out of the receiving body via the belt exit. 13. A protection case for receiving an electronic device, the protection case comprising: a receiving body for receiving the electronic device;a pair of winding mechanisms correspondingly set at two opposite sides of the receiving body; anda pair of belts correspondingly being wound on the winding mechanisms;wherein the belts extend from the winding mechanisms to fasten the receiving body to a user, the receiving body comprises a top board, a bottom board parallel to the top board, an inner wall, and a side wall perpendicularly connected to the top board and the bottom board, the top board, the bottom board, a portion of the side wall, and the inner wall cooperately define the receiving body, the receiving body comprises a pair of receiving grooves adjacent to two opposite sides of the side wall, and a receiving cavity located between the pair of receiving grooves, the winding mechanisms are correspondingly accommodated in the receiving grooves, each of the winding mechanisms comprises a pair of supporting posts fastened to a lower surface of the receiving groove, a holding rod, a winder, and a pair of resilient pieces, two opposite ends of the holding rod are correspondingly connected to the top ends of the supporting posts, the winder is rotatably sleeved on the holding rod, the resilient pieces connect two ends of the winder with two corresponding ends of the holding post to provide a restoring force to the winder, the belt is wound on the winder, the winder comprises a pair of positioning sections and a holding section located between the pair of positioning sections, the winder defines a plurality of evenly spaced positioning recesses in a circumferential surface of each positioning section along an axial direction of the winder, each of the winding mechanisms further comprises a pair of positioning assemblies correspondingly received in a pair of positioning through holes extending through the inner wall and communicating the receiving cavity and the receiving groove, the pair of positioning assemblies correspondingly engage with the positioning recesses to position the rotation of the winder. 14. The protection case of claim 13, wherein each of the positioning assemblies comprises a spring, a positioning block, a fastening bolt, the positioning block and the fastening bolt are correspondingly connected to two opposite ends of the spring, an opening of each positioning through hole defined on an inner side surface of the receiving groove is aligned with the positioning section, the positioning blocks extend retractably out of the positioning through hole via the opening and insert into the positioning recesses to position the winder. 15. The protection case of claim 13, wherein the winder defines a second fastening hole in an outer end surface of each positioning section away from the holding section, the holding rod defines a first fastening hole in each of two opposite end surfaces along a longitudinal direction of the holding rod, the resilient pieces are correspondingly sleeved on the holding rod from two opposite ends of the holding rod, the winder is located between the pair of resilient pieces, two opposite ends of each resilient pieces is correspondingly connected to the first fastening hole and the second fastening hole. 16. The protection case of claim 13, wherein each of the winding mechanism further comprises a pair of covers for correspondingly covering a pair of openings of the pair of receiving grooves, a pair of first peripheries are formed between the opening and a top surface of the top board or a bottom surface of the bottom board, a pair of second peripheries are formed in the second part and perpendicularly connected to the first peripheries, each of the covers comprises a pair of parallel third peripheries, a pair of fourth peripheries perpendicularly connected to the third peripheries, an inner side surface, and a outer side surface, the cover is pivotally connected to the lower first periphery via a rotating projection extending out from the lower third periphery. 17. The protection case of claim 13, wherein each of the pair of belts comprises a wide section and a narrow section, a width of the wide section is greater than a width of the narrow section, the narrow section is connected to a middle of an end of the wide section, and each of the pair of belts is wrapped on the winding mechanism with the narrow section first wrapped on the winding mechanism.