1. A compound bow comprising:
a bow handle that a user holds with his or her hand;
a pair of bow blades that are combined with both ends of the bow handle, of which at least one bow blade is rotatably combined with the bow handle;
a pair of pulleys that are rotatably combined with respective rear ends of the pair of the bow blades so as to rotate around a rotating axis of each pulley;
a bow string that is formed between the pair of the pulleys and that is pulled for discharge of an arrow; and
a blade rotating unit that rotates the bow blade that is rotatably combined with the bow handle, in order to adjust or release tension of the bow string by adjusting distance between the pair of the pulleys in the case of controlling the tension of the bow string or disjointing or repairing the bow.
2. The compound bow according to claim 1, wherein the pair of the bow blades are rotatably combined around rotating axes that are formed at both ends of the bow handle, and a pair of blade rotating units are provided to rotate the pair of the bow blades, respectively.
3. The compound bow according to claim 1, wherein the blade rotating unit comprises: a connection member of which the one end is combined with one end of the bow blade, and the other end is combined with one side of the bow handle; and a length control member that controls length of the connection member, wherein the length of the connection member that is formed between one end of the bow blade and the bow handle is controlled by the length control member.
4. The compound bow according to claim 3, wherein the one end of the connection member is combined with a pin that is formed in the width direction of the bow blade.
5. The compound bow according to claim 3, wherein the length control member comprises a winding unit that rotates an axis that is rotatably combined at one side of the bow handle and winds or releases the connection member that is combined with the axis on or from the axis.
6. The compound bow according to claim 5, wherein the winding unit of the length control member comprises: a worm wheel at the center of which the axis is combined; and a worm that rotates the worm wheel in which threads that are formed on the outer circumferential surface of the worm are tooth-engaged with gear teeth that are formed on outer circumferential surface of the worm wheel, and
wherein the connection member comprises a belt whose one end is combined on one side of the bow blade that is extended forwards from the bow handle, and whose other end is combined on one end of the axis of the worm wheel and that is wound or released on or from the axis as the worm gear rotates.
7. The compound bow according to claim 6, wherein a rubber shock absorber that decreases a shock transferred to the bow after discharge of an arrow is provided in the belt.
8. The compound bow according to claim 7, wherein a shock-absorbing hole that decreases the shock of the bow is piercingly formed in the rubber shock absorber.
9. The compound bow according to claim 6, wherein a belt coupling groove that is piercingly formed transversely in the diameter direction from one side of the outer circumferential surface of the axis to the other side thereof is formed at one end of the axis of the worm wheel, so that the other end of the belt is fitted into the belt coupling groove.
10. The compound bow according to claim 9, wherein a belt fixing groove that communicates with the belt coupling groove and whose width is larger than that of the belt coupling groove is formed at the other side of the axis of the worm wheel, in which an end portion of the belt whose thickness is thicker than the other portion of the belt is safely mounted in the inside of the belt fixing groove so as not to be protruded outwards from the outer circumferential surface of the axis of the worm wheel.
11. The compound bow according to claim 5, wherein the winding unit of the length control member comprises: a ratchet gear at the center of which one end of an axial bolt that forms the axis is combined; and a pawl whose one side is tooth-engaged with gear teeth of the ratchet gear so that the ratchet gear rotates only in one direction, and
wherein the connection member comprises a belt whose one end is combined on one side of the bow blade that is extended forwards from the bow handle, and whose other end is combined on one end of the axial bolt of the ratchet gear and that is wound or released on or from the axial bolt as the ratchet gear rotates.
12. The compound bow according to claim 11, wherein a spring is provided in the pawl so that the pawl is tooth-engaged with the gear teeth of the ratchet gear again after the pawl is released from the gear teeth of the ratchet gear according to rotation of the ratchet gear.
13. The compound bow according to claim 11, wherein a winding indicator on the edge of which numbers are circumferentially engraved is formed in the ratchet gear so as to see a winding degree of the ratchet gear.
14. The compound bow according to claim 11, wherein a rubber shock absorber that decreases a shock transferred to the bow after discharge of an arrow is provided in the belt.
15. The compound bow according to claim 11, wherein a belt coupling groove that is piercingly formed transversely in the diameter direction from one side of the outer circumferential surface of the axial bolt to the other side thereof is formed in the axial bolt of the ratchet gear so that the other end of the belt is fitted into the belt coupling groove.
16. The compound bow according to claim 15, wherein a belt fixing groove that communicates with the belt coupling groove and whose width is larger than that of the belt coupling groove is formed at the other side on the outer circumferential surface of the axial bolt, in which an end portion of the belt whose thickness is thicker than the other portion of the belt is safely mounted in the inside of the belt fixing groove so as not to be protruded outwards from the outer circumferential surface of the axial bolt.
17. The compound bow according to claim 6, wherein the bow blade that is rotatably combined with the bow handle, comprises:
a limb pocket whose one end is rotatably combined around a rotating axis that is formed at one end of the bow handle and that is extensively formed forwards from one end of the bow handle; and
a bow limb whose one end is combined with the limb pocket and that is extensively formed backwards from the bow, and on the other end of which a rotating axis with which a pulley is combined is formed.
18. The compound bow according to claim 17, wherein an insertion groove is lengthily formed in the limb pocket so as to allow the front side of the bow limb to be inserted into the insertion groove.
19. The compound bow according to claim 17, wherein a coupling pin that is combined with one end of the belt is formed at one end of the front side of the limb pocket, in which a pin hole that is formed at one end of the belt is combined in one side of the coupling pin.
20. The compound bow according to claim 17, wherein a rubber shock absorber that decreases a shock transferred to the bow after discharge of an arrow is provided in the limb pocket.
21. The compound bow according to claim 17, wherein an arrowhead insertion hole into which an arrowhead is inserted so as to be disjointed from or combined with an arrow, and an arrowhead wing insertion portion that has one or more arrowhead wing insertion hole that is extended bilaterally from the arrowhead insertion hole and into which one or more arrowhead wings are inserted, are formed in the limb pocket.
22. The compound bow according to claim 17, wherein a notch insertion hole is formed in the limb pocket, so that a notch is inserted into the notch insertion hole so as to be easily replaced from an arrow.
23. The compound bow according to claim 17, wherein a hook portion is formed at the front end of the limb pocket so that the bow can be hung up on an external object.
24. The compound bow according to claim 1, wherein the blade rotating unit comprises:
a cylinder whose one end is rotatably combined with one side of the bow handle, and that has an inner space to or from which fluid such as gas or oil is supplied or discharged;
a piston that is placed in the inner space of the cylinder and that is moved in the lengthy direction according to a supply or discharge of the fluid to or from the cylinder; and
a piston rod whose one end is fixedly combined with the piston and whose other end is extensively formed outwards from the cylinder through the other end of the cylinder, and that is rotatably combined with one side of the bow blade that is extended in the rear side of the bow handle.
25. The compound bow according to claim 24, wherein the bow blade that is rotatably combined with the bow handle, comprises:
a limb pocket whose one end is rotatably combined on one end of the bow handle, and that is extensively formed at one end of the bow handle in the rear side of the arrow, and on the other end of which the other end of the piston rod is combined; and
a bow limb whose one end is combined with the limb pocket and that is extensively formed backwards from the bow, and on the other end of which a rotating axis with which a pulley is combined is formed.
26. The compound bow according to claim 24, wherein a fluid supply unit is provided to supply or discharge the fluid such as gas or oil to or from the inner space of the cylinder.
27. The compound bow according to claim 26, wherein the fluid supply unit is an hydraulic oil pump.
28. The compound bow according to claim 1, wherein the blade rotating unit comprises:
a worm gear that comprises a worm wheel whose axis is rotatably combined on one side of the bow handle and on the outer circumferential surface of which gear teeth are formed; and a worm on the outer circumferential surface of which threads are formed in which the worm is tooth-engaged with the gear teeth of the worm wheel to thereby rotate the worm wheel; and
an arch portion that is extended downwards in the form of an arc from the front-lower surface of the bow blade and on the outer circumferential surface of which gear teeth that are tooth-engaged with the gear teeth of the worm wheel are formed.
29. The compound bow according to claim 1, wherein the blade rotating unit comprises:
an arch portion that is extended downwards in the form of an arc from the front-lower surface of the bow blade and on the outer circumferential surface of which gear teeth are formed; and
a worm that is formed at one side of the bow handle and on the outer circumferential surface of which threads that are tooth-engaged with the gear teeth of the arch portion are formed.
30. The compound bow according to claim 1, wherein the blade rotating unit comprises:
an arch portion that is extended downwards in the form of an arc from the front-lower surface of the bow blade and on the outer circumferential surface of which gear teeth are formed; and
a rotating wheel that is rotatably formed at one side of the bow handle and on the outer circumferential surface of which gear teeth that are tooth-engaged with the gear teeth of the arch portion are formed, to thereby rotate the arch portion according to rotation of the rotating wheel to thus rotate the bow blade.
31. The compound bow according to claim 30, further comprising:
a ratchet gear that is formed at one side of the bow handle and is formed coaxially at one end of the rotating wheel; and
a pawl whose one side is tooth-engaged with gear teeth of the ratchet gear so that the ratchet gear rotates only in one direction.
32. The compound bow according to claim 1, wherein the blade rotating unit comprises:
a worm gear that comprises a worm wheel whose axis is rotatably combined on one side of the bow handle; and a worm on the outer circumferential surface of which threads are formed in which the worm is tooth-engaged with the gear teeth formed on the outer circumferential surface of the worm wheel to thereby rotate the worm wheel, in which one side of the bow blade is combined on one side of the axis of the worm wheel to thus rotate the bow blade together as the worm wheel rotates.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An infrared detector comprising:
a detecting element comprising an absorbing part, a non-absorbing part, a first end located in the absorbing part, and a second end located in the non-absorbing part;
a first electrode electrically connected with the first end;
a second electrode electrically connected with the second end; and
a covering structure covering the non-absorbing part.
2. The infrared detector of claim 1, wherein the detecting element further comprises a carbon nanotube layer comprising a plurality of carbon nanotubes disposed uniformly.
3. The infrared detector of claim 2, wherein the carbon nanotube layer is a pure structure of single-walled carbon nanotubes.
4. The infrared detector of claim 2, wherein a heat capacity per unit area of the carbon nanotube layer structure is less than or equal to about 2\xd710\u22124 Jcm2*K.
5. The infrared detector of claim 1, further comprising a substrate, wherein the detecting element and the covering structure is disposed on the substrate, the covering structure and the substrate defines a hollow space, and the non-absorbing part is disposed in the hollow space.
6. The infrared detector of claim 5, further comprising a reflective layer disposed between the substrate and the detecting element.
7. The infrared detector of claim 6, wherein the reflective layer is an IR-reflective layer, and a material of the reflective layer is selected from the group consisting of TiO2\u2014Ag\u2014TiO2, ZnS\u2014Ag\u2014ZnS, AINO\u2014Ag\u2014AIN, Ta2O3\u2014SiO, and Nb2O3\u2014SiO2.
8. The infrared detector of claim 1, wherein the covering structure is a U-shaped frame, and comprises a first covering sheet and a second covering sheet substantially parallel with each other; the non-absorbing part is disposed on a surface of the second covering sheet in the U-shaped frame and covered by the first covering sheet; the absorbing part extends from the U-shaped frame.
9. The infrared detector of claim 1, wherein the covering structure is an enclosure defining a hollow space, and the detecting element is disposed in the covering structure.
10. The infrared detector of claim 9, wherein the covering structure comprises a light-passing region, and the absorbing part of the detecting element faces the light-passing region.
11. The infrared detector of claim 10, wherein the light-passing region comprises a plurality of through holes.
12. The infrared detector of claim 9, wherein the covering structure comprises an upper sheet comprising a first surface and a lower sheet comprising a second surface, the first surface and the second surface faces to each other, and the detecting element is curved and disposed on the first surface and the second surface.
13. The infrared detector of claim 12, wherein the upper sheet comprises a plurality of through holes, and the lower sheet comprises a plurality of through holes.
14. The infrared detector of claim 1, wherein an area ratio between the absorbing part and the non-absorbing part is in a range from about 1:2 to about 2:1.
15. An infrared detector comprising:
a detecting element comprising an absorbing part, a non-absorbing part, a first end located in the absorbing part, a second end located in the non-absorbing part, wherein an angle between the absorbing part and the non-absorbing part is less than 90 degrees;
a first electrode electrically connected with the first end; and
a second electrode electrically connected with the second end.
16. The infrared detector of claim 15, further comprising an insulated structure comprising a first surface and a second surface, wherein an angle between the first surface and the second surface is less than 90 degrees, the absorbing part is disposed on the first surface, and the non-absorbing part is disposed on the second surface.
17. The infrared detector of claim 15, wherein the detecting element comprises a carbon nanotube layer consisting of a plurality of single-walled carbon nanotubes.
18. The infrared detector of claim 17, wherein the single-walled carbon nanotubes are oriented in a substantially same direction and joined end-to-end by Wan der Waals attractive force.
19. An infrared detector comprising:
a detecting element comprising an absorbing part and a non-absorbing part;
a first electrode electrically connected with the absorbing part;
a second electrode electrically connected with the non-absorbing part;
means for sheltering the non-absorbing part from infrared; and
wherein the detecting element comprises a carbon nanotube layer structure.
20. The infrared detector of claim 19, wherein the carbon nanotube layer structure is a pure structure of single-walled carbon nanotubes oriented in a substantially same direction and joined end-to-end by Wan der Waals attractive force.