Abstract:
A paintball gun anti-blocking device includes a first, infra-red receiver and emitter disposed near the bottom of the inner wall of the gun tube to detect when the paintball enters the normal shooting position. A second infra-red receiver and emitter are positioned relative to the trigger as to detect if the trigger is pressed to the shooting position.

Description:
BACKGROUND OF THE INVENTION 
   1. Field of the Invention 
   This invention is to provide a paintball gun anti-blocking device to proceed the actuation of such paintball gun, wherein an infra-red receiver and infra-red emitter inside a gun tube and also above and below a trigger have to be on the status of “ON” and messages thereof sent to a substrate of a gun body so that the bolt sleeved in the gun tube is enabled to proceed with the motion of shooting the paintball. 
   2. Description of Related Art 
   The manufacturers develop to manufacture paintball gun, assemblies in order to achieve shooting of a paintball safely. Specifically, a detection and touching switch is usually assembled on a trigger of the gun or inside a gun tube. One current form of assembly of said detection and touching switch is using a micro-actuating switch assembled on the predetermined position or orientation of the trigger of the gun. The micro-actuating switch is touched while the trigger is pressed so as to transfer the message onto a substrate of the gun body so as to make a bolt inside the gun tube shoot the paintball which falls into the normal shooting position. However, the restore force of such micro-actuating switch is by a spring which tended to be elastic tired after being used one period of time. Another current form of assembly is a sensor inside the gun tube near the bottom such that when the paintball falls into the normal position of shooting, the messages could be transferred onto the substrate of the gun body and in cooperation with the trigger to shoot the paintball normally. 
   SUMMARY OF THE INVENTION 
   This invention is to provide an anti-blocking device sensing if the paintball enters into a normal shooting position so that a user, when shooting with the paintball gun, could detect exactly if the paintball is in the normal shooting position for shooting and sensing the actuation of the trigger. An infra-red receiver and infra-red emitter inside the gun tube and above and below the trigger, respectively, transfer the message to the substrate of the gun body to be the basis of actuation for the gun bolt to shoot the paintball. 
   The object of this invention is to provide a first infra-red receiver and emitter near the bottom of an inner wall of a gun tube to detect if a paintball enters into the normal position. When electronically interconnecting, the first infra-red receiver and emitter will form a status of “OFF”. If blocked by a paintball, the first infra-red receiver and emitter will form a status of “ON” which means it is O.K. to shoot. A second infra-red receiver and emitter connected to the substrate are provided on opposite positions of the trigger to detect if the trigger has been pressed. An “OFF” message is formed when the second infra-red receiver and emitter are interconnecting, while an “ON” message is formed to show shoot-able status when the second infra-red receiver and emitter are blocked. Thereby, actuation of the bolt to shoot the paintball by the paintball gun is based upon the first and second infra-red receivers and emitters. 
   The above and other objects, features and advantages of the present invention will become apparent from the following detailed description taken with the accompanying drawings. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG. 1  is an exploded view of a preferred embodiment of a paintball gun of this invention; 
       FIG. 2  is a perspective view of the paintball gun of this invention; 
       FIG. 3  is a side view of the paintball gun of this invention; 
       FIG. 4  is a cross sectional view of the paintball gun according to section line  11 — 11  of  FIG. 3 ; and 
       FIG. 5  is an enlarged detailed view of encircled area  12  of  FIG. 3 . 
   

   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
   This invention provides an anti-blocking device for a paintball gun  1 . Referring to  FIGS. 1 and 2 , an infra-red receiver  71  and an infra-red emitter  72  covered by light-filtration mirrors  75  and  76  on their outer peripheries are mounted on both sides of an inner tube wall of a gun tube  2 . A bolt  3  of the gun tube  2  allocates paintballs in the paintball gun  1 . The infra-red receiver  71  and the infra-red emitter  72  are preferably installed on the position near one-third of the height of the lower portion of the inner tube wall of the gun tube  2 , as illustrated at the left of  FIG. 4 . One end of conducting wires  73  and  74  of the receiver  71  and the emitter  72  are connected onto a substrate  5  assembled inside a gun body  4 . Fore and rear bundle bodies  42  and  43  are inserted into a holding cavity  41  of the gun body  4  on a position contacting with a trigger  6  for controlling the actuation of the bolt  3  inside the rear-section of the inner tube wall of the gun tube  2 . A pin body  44  is movably contained between the fore and rear bundle bodies  42  and  43 . The pin body  44  has a hole  441  penetrating through the top and the bottom of the pin body  44  on a predetermined section. An elastic element  45  is clipped between one end of the pin body  44  and the rear bundle body  43  such that the pin body  44  is elastically pushed outwardly by the elastic element  45 . The other end of the pin body  44  penetrates a hole  421  of the fore bundle body  42 . An infra-red receiver  81  and an infra-red emitter  82  connected to the substrate  5  are respectively settled above and below the hole  441  of the pin body  44  while the trigger  6  is un-pressed. 
   For shooting the paintball gun  1  in which the gun tube  2  and the trigger  6  are respectively assembled with infra-red receivers and infra-red emitters and referring to  FIG. 3 , paintballs  9  are filled inside a loader  21 . As illustrated at the left of  FIG. 4 , the paintballs  9  in the loader  21  will fall into the normal shooting position of the gun tube  2  in sequence. Thus, the infra-red receiver  71  and infra-red emitter  72  assembled on both sides of the inner tube wall of the gun tube  2  are shielded by the paintball  9  in the gun tube  2  to form the status of “ON”. Said message will be transferred onto the inner substrate  5  of the gun body  4  through the conducting wires  73  and  74 . When the trigger  6  is pressed and as illustrated at the right of  FIG. 5 , the infra-red receiver  81  and infra-red emitter  82  assembled above and below the trigger  6  are shielded by the pin body  44  to form the status of “ON”. Said message will be transferred onto the substrate  5  inside the gun body  4  through the conducting wires  83  and  84 . With the “ON” status of receivers  71  and  82  and emitters  72  and  82 , the bolt  3  sleeved in the gun tube  2  will proceed shooting the paintball  9  in the normal shooting position. 
   In addition, when the paintball  9  inside the loader  21  does not fall into the normal shooting position in the gun tube  2  successfully, as illustrated at the right of  FIG. 4 , the infra-red receiver  71  and infra-red emitter  72  assembled on both sides of the inner wall of the gun tube  2  are interconnected by light to form the status of “OFF”. Said message will be transferred onto the substrate  5  of the gun body  4  through the conducting wires  73  and  74 . Thus, even if the user presses and/or triggers the trigger  6 , it is impossible to permit the bolt  3  in the gun tube  2  to proceed shooting. 
   The paintball gun anti-blocking device according to this invention can be provided with a third switch on the substrate  5  inside the gun body  4  so as to cut-off the function of the infra-red receiver  71  and infra-red emitter  72  on both sides of the inner wall of the gun tube  2 . Thus, when the user cleans the paintball gun  1  it is possible to press and trigger the trigger  6  to drive the bolt  3  in the gun tube  2  to proceed with the motion of shooting. 
   Additionally, when the trigger  6  is pressed, the movable pin body  44  of the gun body  4  against the trigger  6  according to this invention, blocks the infra-red receiver  81  and infra-red emitter  82  to form the status of “ON”. Alternatively, when the trigger  6  is not pressed and triggered and the pin body  44  moves outwardly by the elastic member  45 , the hole  441  penetrating through the top and the bottom of the pin body  44  are aligned with and the infra-red receiver  81  and infra-red emitter  82  are interconnected by light to turn the status of “OFF”. Said message will be transferred onto the inner substrate  5  of the gun body  4  as the basis of shooting by the bolt  3  in the gun tube  2 . 
   While the invention herein disclosed has been described by means of specific embodiments, numerous modifications and variations could be made thereto by those skilled in the art without departing from the scope and spirit of the invention set forth in the claims.