RELATED APPLICATIONS 
     This application claims priority from Korean Patent Application No. 10-2015-0052149 filed Apr. 14, 2015, which is herein incorporated by reference in its entirety. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a split type magazine of an air rifle, and more particularly, to a split type magazine of an air rifle which includes a pellet rotating and conveying lock unit for preventing rotation of a pellet rotating and conveying unit and of which a magazine body and a magazine fixing block are divided from each other. 
     2. Background Art 
     In general, an air rifle is a kind of gun to fire a pellet with pneumatic pressure of compressed air and is mainly used for the purpose of hunting or shooting sports because it is weaker in power than guns which use gunpowder. 
     Because the air rifles are safer than the guns which use gunpowder and require simple safety facilities which must be equipped in shooting ranges, air rifles have been relatively widely used in many countries for the purpose of leisure activities or sports. 
     A spring type air rifle which is a kind of the air rifle adopts a method that makes compressed air by pushing a piston inside a cylinder using elasticity to return a compressed spring to its original state and fires a pellet using the power. Such spring type air rifles are mainly used in replica guns which use 6 mm BB bullets. Such a spring type air rifle has several disadvantages in that a user has to compress the spring with his or her own power whenever the user fires and in that the air rifle generates additional recoil in addition to the recoil caused by reaction of a shot while the spring returns to its original state. 
     Next, a pump type air rifle compresses air by a pump hung on the rifle, stores the compressed air in a cylinder, and then, opens the compressed air at the time of an outburst so as to shoot a pellet with the power. Like the spring type air rifle, the pump type air rifle also has a disadvantage in that the user has to compress air by human effort using a lever whenever shooting. Before compressed air type air rifles, air rifles for competition mainly feature the pump type air rifles. 
     Next, a carbon dioxide type air rifle shoots a pellet with pressure generated while liquid carbon dioxide is vaporized. Because a cylinder is previously charged with carbon dioxide, the carbon dioxide type air rifle is more convenient than the spring type or pump type air rifle that the user has to compress air with the hand whenever shooting. However, the carbon dioxide type air rifle has a disadvantage in that hit is not uniform because pressure generated at the time of evaporation of gas is greatly influenced by ambient temperature. 
     Next, a compressed air type air rifle shoots a pellet by compressed air used for diving or compressed air which previously charged in the cylinder using an air compressor. The compressed air type air rifle varies little from the carbon dioxide type air rifle in appearance. Because there is no need to compress air manually whenever the user shoots a pellet, the compressed air type air rifle has convenience in use like the carbon dioxide type air rifle. However, the compressed air type air rifle is uniform in hitting differently from the carbon dioxide type air rifle. Now, air rifles for competition mainly feature the compressed air type air rifles. 
     Differently from bullets fired by gunpowder, pellets used in the air rifle is in the form that just a warhead exists without any cartridge case, because the pellets gain momentum necessary for firing the bullets not from gunpowder contained in the pellet but from the compressed air. The tail section of the pellets used in the air rifle is made into the form of a skirt in order to effectively receive power of compressed air. 
     In an aspect of materials of the pellet, in order to be less susceptible to wind resist, the pellets are mainly made of lead which is heavy metal. Representatively, there are pellets of 4.5 mm caliber, 5.0 mm caliber, 5.5 mm caliber and 6.35 mm caliber, and the pellets of 4.5 mm caliber are mainly used for competition, and the pellets of 5.5 mm caliber which is relatively strong in power are used for hunting. 
     Such air rifles are divided into single-shot rifles and multi-shot rifles. 
     Korean Patent Laid-open Publication No. 10-2001-0026459 discloses an example of the multi-shot air rifles. 
     As shown in  FIG. 1 , in order to insert a magazine  2  into a magazine combining part  3  of a rifle body  1 , after a user pushes a trigger assembly forward to back a breechblock  6  and inserts the magazine  2  into the magazine combining part  3  of the rifle body  1 , when the user pulls the trigger assembly  5  back to move the breechblock  6  forward, a single pellet is loaded in a chamber  4 . However, the conventional multi-shot air rifle has a disadvantage in that it has to fire the single pellet loaded in the chamber  4  when the user takes out the magazine  2  from the magazine combining part  3  of the rifle body  1 . 
     PATENT LITERATURE 
     
         
         
           
             Patent Literature 1: Korean Patent Laid-open Publication No. 10-2001-0026459 
           
         
       
    
     SUMMARY OF THE INVENTION 
     Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior arts, and it is an object of the present invention to provide a split type magazine of an air rifle which includes a magazine body having a pellet rotating and conveying lock unit for preventing rotation of a pellet rotating and conveying unit and a magazine fixing block divided from the magazine body so that just the magazine body is separated even though a breechblock moves forward, thereby removing inconvenience that a user unnecessarily loads and fires a pellet. 
     To accomplish the above object, according to the present invention, there is provided a split type magazine of an air rifle including: a magazine case which is formed in a cylindrical shape and includes an insertion groove formed in a lower end portion thereof to be fit to a magazine fixing block and a plurality of screw holes perforated at both sides; a left side plate which includes a plurality of holes to which bolts for fixing the magazine case are inserted, a magazine fixing shaft  23  formed at one side thereof, a protrusion part formed at a lower end portion of the magazine fixing shaft, a polygonal head part formed at an end of the magazine fixing shaft, a screw formed at an end portion of the magazine fixing shaft, and an inverted U-shaped groove formed at a lower end thereof; a pellet rotating and conveying unit which includes a boss part and a protrusion part inserted into the magazine fixing shaft of the left side plate, a spring support hole perforated in the boss part, a plurality of pellet insertion holes on which a plurality of pellets can be loaded and of which outer circumferential parts are opened; a right side plate which is attached by a plurality of bolts through the screw holes of the magazine case and includes a part formed at the front side thereof to cover a magazine fixing pin slide lock insertion part, an insertion groove formed at a lower end portion thereof and fit to the magazine fixing block, and a circular opening formed at the middle part thereof; a right inner plate which is inserted into the opening of the right side plate and includes a boss part formed at the left side thereof, a counter sink hole formed at the right side thereof, and an inverted ‘U’-shaped groove formed at a lower end thereof; a magazine rotary shaft fixing member which is fit to the counter sink hole of the right inner plate and includes a hole perforated at a small diameter part thereof, a spring and a ball inserted into the hole, a screw hole formed in the middle part thereof, and a recess formed in the middle part thereof to be fit to the polygonal head part of the left side plate; a spring of which one end is fixed to the spring support hole of the boss part of the pellet rotating and conveying unit and of which the other end is fixed to the hole formed in the magazine rotary shaft fixing member; a bolt for fixing the magazine rotary shaft fixing member to the screw of the magazine fixing shaft of the left side plate; and a magazine fixing block which includes balls which are respectively disposed at both sides thereof and elastically supported by a spring to be inserted into the insertion groove of the magazine case, a plurality of bolts inserted into a plurality of holes formed in a magazine fixing part of a machine part to attach the magazine fixing block to the engine part, and a pole index fixed and assembled to the middle part thereof by a pin. 
     Furthermore, the magazine case includes a pellet rotating and conveying unit which is disposed at the front thereof and to which a pellet rotating and conveying unit fixing pin pressed by a slide lock button and a spring elastically supported by a spring and a ball is assembled. 
     Moreover, the magazine rotary shaft fixing member includes a plurality of spring fixing holes to control elasticity of the spring. 
     Additionally, when a breechblock pushes down the middle part of the pole index, the pole index advances in the clockwise direction so as to be in a next lock waiting state of the pellet rotating and conveying unit, and, in a case that there is a pellet, an upper wind of the magazine fixing block fixes the pellet to prevent the pellet from going over. 
     Compared with the conventional air rifles that the magazine is separated after the user retreats the breechblock, the split type magazine of an air rifle according to the present invention allows the user to separate the magazine without moving the breechblock. 
     Compared with the conventional air rifles which are dangerous in safety because a single pellet is loaded in the chamber when the user inserts the magazine, the split type magazine of an air rifle according to the present invention is safe because the pellet is not loaded in the chamber when the user inserts the magazine into the rifle body. 
     Additionally, compared with the conventional air rifles which are dangerous because a single pellet is loaded in the chamber when the user inserts the magazine, the split type magazine of an air rifle according to the present invention provides a safety device doubly because it includes the lock unit of the pellet rotating and conveying unit. 
     In addition, compared with the conventional air rifles which have to fire a pellet when the magazine is separated, the split type magazine of an air rifle according to the present invention enhances safety because the pellet rotating and conveying unit is locked when the magazine is separated. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above and other objects, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments of the invention in conjunction with the accompanying drawings, in which: 
         FIG. 1  is an exploded view of an air rifle body having a magazine according to a prior art; 
         FIG. 2  is an exploded view of a magazine body having a lock unit for preventing rotation of a pellet rotating and conveying unit of a split type magazine of an air rifle according to the present invention, and for your reference, illustrates a breechblock; 
         FIG. 3  is an exploded view of a magazine fixing block; and 
         FIG. 4  is a view showing a magazine combining part of a rifle body of the split type magazine of the air rifle according to the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Hereinafter, reference will be now made in detail to the preferred embodiment of the present invention with reference to the attached drawings. In the drawings, the same components have the same reference numerals even though they are illustrated in different figures. 
     After studying a device that a magazine is separated even though a breechblock advances in the direction of a chamber in order to solve the problems of the conventional air rifles, the inventor of the present invention has invented a split type magazine whose a magazine body could be separated from a magazine fixing block even in a state where the breechblock is inserted into a pellet insertion hole by forming a lower end part of the pellet insertion hole of a pellet rotating and conveying unit to be opened. 
       FIG. 2  is an exploded view of a magazine body having a lock unit for preventing rotation of a pellet rotating and conveying unit of a split type magazine of an air rifle according to the present invention, and for your understanding, illustrates a breechblock, which does not fall into the category of the present invention,  FIG. 3  is an exploded view of a magazine fixing block, and  FIG. 4  is a view showing a part where the magazine fixing block of the present invention is attached to a magazine combining part of a rifle body. 
     The split type magazine  10  of an air rifle according to the present invention is greatly divided into two parts: one being a magazine body  10  and the other being a magazine fixing block  50 . 
     Hereinafter, the split type magazine  10  of an air rifle according to the present invention will be described in more detail. First, the magazine body is as follows. 
     A magazine case  11  is formed in a cylindrical shape and a plurality of screw holes  12  are formed at both ends. A pellet rotating and conveying lock unit which has a pellet rotating and conveying fixing pin  17  pressed by a slide lock button  15  and a spring  16  elastically supported by a spring  13  and a ball  14  is assembled to a space part formed at the front. The spring  13  and the ball  14  clicks when the slide lock button  15  moves from side to side to be locked. An insertion groove  18  which is inserted into a ball  51  of the pellet fixing block  50  is formed at a lower end portion. 
     A left side plate  20  has a plurality of holes  22  formed to be joined to the left side of the magazine case  11  by a plurality of joining bolts  21 . A magazine fixing shaft  23  is formed at one side of the left side plate  20 , and a protrusion part  24  is formed at a lower end portion of the magazine fixing shaft  23 . A polygonal head part  25  is formed at an end of the magazine fixing shaft  23 , and a screw  26  is formed at the right end of the magazine fixing shaft  23 . An inverted U-shaped groove  27  is formed at a lower end of the left side plate  20 . A breechblock  28  can advance into the inverted U-shaped groove  27  and retreat from the inverted U-shaped groove  27 . 
     Moreover, the left side plate  20  has a slide lock unit covering part  29 . The left side plate  20  is attached to the magazine case  11  by the bolts  21 . 
     The dotted circle in  FIG. 2  is a cross sectional view of a pellet rotating and conveying unit  30 . 
     The pellet rotating and conveying unit  30  includes: a boss part  32  and a protrusion part  38  which are fit and inserted into the magazine fixing shaft  23  of the left side plate  20 ; and a spring support hole  33  perforated in the boss part  32 . The first part of a spring  48  is fit into the spring support hole  33 . A plurality of pellet insertion holes  34  to which a plurality of pellets can be loaded are formed in the outer circumferential surface of the pellet rotating and conveying unit  30 , and outer circumferential parts  35  of the pellet insertion holes  34  are opened. 
     A right side plate  31  is attached to the right of the magazine case  11  by the bolts  21  through the screw holes  12  of the magazine case  11 . The right side plate  31  includes a slide lock unit covering part  29  formed at the front side thereof for covering the pellet rotating and conveying lock unit, and an insertion groove  18  which is formed at a lower end portion thereof to be inserted into the pellet fixing block  50 . A right side inner plate  36  is assembled to an opening  37  of the right side plate  31 . 
     The right side inner plate  36  is inserted into the opening  37  of the right side plate  31 , and includes: an inverted ‘U’-shaped opening part  39  formed at a lower end portion thereof; a boss part  40  formed at the left side thereof; and a counter sink hole  41  formed at the right side thereof. The boss part  40  is fit into a right end hole of the pellet rotating and conveying unit  30 . 
     A pellet rotating shaft fixing member  44  has a screw hole  43  formed at an end portion of a middle part thereof and a recess formed at the other end portion thereof to be fit to the polygonal head part  25  of the left side plate  20 . 
     The magazine rotary shaft fixing member  44  has a hole  45  perforated at a small diameter part thereof, and a spring  46  and a ball  47  are inserted into the hole  45 . The ball  47  pressed to the spring  46  serves as a bearing. The magazine rotary shaft fixing member  44  is fit to the counter sink hole  41  of the right inner plate  36  and is fixed by a bolt  49 . 
     An end of the spring  48  is fixed to the spring support hole  33  of the boss part  32  of the pellet rotating and conveying unit  30 , and the other end is fixed to a spring support hole  42  formed in the magazine rotary shaft fixing member  44 . A plurality of spring support holes  42  are formed in the magazine rotary shaft fixing member  44  to control elasticity of the spring  48 . 
     The spring  48  serves to make the pellet rotating and conveying unit  30  rotate with elasticity. In this instance, when the pellet rotating and conveying unit  30  rotates, the protrusion part  38  formed on the pellet rotating and conveying unit  30  and the protrusion part  24  formed on the left side plate  20  come into contact with each other so that the pellet rotating and conveying unit  30  rotates just at a predetermined angle. 
     When the pellet rotating and conveying unit  30  rotates, the right inner plate  36  rotates together with the pellet rotating and conveying unit  30 . In this instance, the magazine rotary shaft fixing member  44  does not rotate because the polygonal head part  25  of the left side plate  20  is combined with the recess of the magazine rotary shaft fixing member  44  and the bolt  49  is fixed to the screw  26 . 
     The bolt  49  fixes the magazine rotary shaft fixing member  44  to the screw  26  of the magazine fixing shaft  23  of the left side plate  20 . 
     Hereinafter, the magazine fixing block  50  will be described as follows. 
     The magazine fixing block  50  has balls  51  which are respectively disposed at both sides thereof and are elastically supported by a spring to be inserted into the insertion groove  18  of the magazine case  11 . The ball  51  is mounted to slightly protrude out from the side wall of the magazine fixing block  50 . When the user presses down the magazine case  11 , the insertion groove  18  presses the ball  51 , and the ball  51  is elastically retreated by the spring. When the user presses more down the magazine case  11 , the ball  51  is fit into the insertion groove  18  to support the insertion groove  18 . 
     The magazine fixing block  50  has a plurality of holes  53  formed to be attached to a magazine fixing part of a machine part  61  using a plurality of bolts  52 . The magazine fixing block  50  has a pole index  55  which is fixed by a pin  54  and is assembled to a middle part thereof. The pole index  55  has an oval-shaped hole  56 . 
     A spring  59  is supported in a hole, which is transversely formed in the magazine fixing block  50 , by a fixing bolt  57 , and one end of the spring  59  elastically supports the pole index  55  in the transverse direction. 
     The pole index  55  is elastically supported by the spring  58  in the upward direction. 
     The pole index  55  fixed by the pin  54  is assembled to the middle part of the magazine fixing block  50 . When the breechblock  28  pushes down the middle part of the pole index  55 , the pole index  55  advances in the clockwise direction so as to be in a next lock waiting state of the pellet rotating and conveying unit  30 . In this instance, in a case that there is a pellet, an upper wind  71  of the magazine fixing block  50  serves to fix the pellet to prevent the pellet from going over. The split type magazine is operated by repeating the above movements. 
     In order to fix the magazine fixing block  50 , the machine part  60  has two screw holes  61 , and the magazine fixing block  50  is fixed when the bolts  52  are inserted into the screw holes  61 . 
     The machine part  60  has a pellet loading hole  62 , and the pellet is loaded on the pellet loading hole  62  by the breechblock  28 . 
     An assembling process of the components of the split type magazine for the air rifle according to the present invention will be described. 
     In a state where the left side plate  20  gets in contact with the right side of the magazine case  11 , the four bolts  21  are inserted and fixed in order. The first part of the spring  48  is fit into the spring hole  33  of the pellet rotating and conveying unit  30 , and then, the pellet rotating and conveying unit  30  and the spring  48  are fit to the magazine fixing shaft  23  of the left side plate  20 . 
     Next, the spring  13  is put into the hole formed in the front side of the magazine case  11  and the ball  14  is put into the hole, and then, the slide lock button  15  is pushed into the groove sideways. The pellet rotating and conveying fixing pin  17  pressed by the spring  16  is assembled. 
     In the above state, the right side plate  30  is fixed to the holes  12  of the magazine case  11  using the four bolts  21 . 
     Next, the right inner plate  36  is adjusted to the magazine case  11 , and then, is fixed by the four bolts  21 . At the same time, the boss part  40  of the right inner plate  36  is fit into the hole of the pellet rotating and conveying unit  30 . 
     Continuously, after the spring  46  and the ball  47  are put into the hole  42  of the magazine rotary shaft fixing member  44 , one end portion of the spring  48  is fit into the hole  42 , and then, is inserted into the hole of the right inner plate  36 . 
     After that, the bolt  49  is coupled to the screw  26  formed on the magazine fixing shaft  23  of the left side plate  20 . Then, the assembly of the split type magazine is finished. 
     After that, an assembling process of the magazine fixing block  50  will be described. 
     The springs and the balls  51  are inserted into the transverse holes formed at both ends of the magazine fixing block  50 , and then, are fit into the holes not to get out of the holes by making entrances of the transverse holes get narrower. The balls  51  partly protrude from both sides of the magazine fixing block  50 . When the user presses down the magazine case  11 , the insertion groove  18  of the magazine case  11  presses the balls  51  so that the balls  51  moves inwardly by elasticity of the spring. When the user presses down the magazine case  11  more, the balls  51  are elastically supported to the insertion groove  18  so that the magazine case  11  is snap-fixed to the magazine fixing block  50 . 
     After the pin  54  is inserted into the hole formed at the side of the magazine fixing block  50 , the pole index  55  having the oval-shaped hole  56  is rotatably fixed, and then, the spring  59  is put into a hole  70  and the bolt  57  is assembled to the hole. The spring  58  is inserted into the bottom side of the pole index  55 . 
     The assembled magazine fixing block  50  is inserted into a recess of the machine part  60 , and then, is firmly fastened in the recess of the machine part  60  by the bolt  52 . 
     A method to insert a pellet into the magazine will be described. 
     First, put the slide lock button  15  at a lock position. 
     Second, rotate the right inner plate  36  in the clockwise direction to the finish. 
     Third, in the above state, insert pellets into the pellet insertion holes  34  one by one while rotating the right inner plate  36  in the counter clockwise direction. 
     Fourth, insert and fix into the magazine fixing block  50 . 
     Fifth, put the slide lock button  15  at a lock release position. 
     Sixth, retreat the breechblock  28 , and then, push the breechblock  28  forward so that a single shot of the pellet is loaded in a chamber. 
     In this instance, when the breechblock  28  pushes down the middle part of the pole index  55 , the pole index  55  advances in the clockwise direction so that the pellet rotating and conveying unit  30  is in the next lock waiting state. In this instance, in the case that there is a pellet, the upper wind  71  of the magazine fixing block  50  serves to fix the pellet to prevent the pellet from going over.
A split type magazine of an air rifle includes a lock unit to prevent the rotation of a pellet rotating and conveying unit, A magazine body and a magazine fixing block of the split type magazine are divided from each other. The split type magazine allows the user to separate the magazine without moving the breechblock. It is safe because the pellet is not loaded in the chamber when the user inserts the magazine into the rifle body. Further, the lock unit of the pellet rotating and conveying unit enhances safety because the pellet rotating and conveying unit is locked when the magazine is separated.