JP7365326B2 - Sector gear and airsoft guns that incorporate it - Google Patents

Description

This invention relates to the technology of toy guns that fire plastic bullets and the like with safe firing power, and in particular to airsoft guns that fire bullets with air compressed by a piston driven by a drive motor, and its engine. Fields that manufacture and provide sector gear incorporated in departments, as well as fields that manufacture and provide items that do not belong to that field but can be identified as incorporating the content of the creation of technical ideas in that field. Of course, it also includes materials, machinery, and parts from fields that provide and sell equipment and equipment necessary for transportation, storage, assembly, and installation related to those fields. Fields that provide the materials necessary for, for example, wood, stone, various types of fibers, plastics, various metal materials, etc., fields of electronic components incorporated in these materials and control-related equipment that integrate them, fields of various measuring instruments, In addition, we test the equipment and instruments in the field of power machinery that moves the equipment and equipment, the field of electricity that provides energy, electricity and oil that are the energy source, and other fields that are generally collectively referred to as industrial machinery. Fields related to research, exhibition, sales, import/export, etc., as well as the collection and transportation of waste generated from the results of their use and the equipment and equipment used to manufacture them. In addition to fields such as recycling, which efficiently reuses waste, there are even new fields that cannot be imagined at this point, and there is almost no technological field that is not related.

(Point of focus)
In an electric airsoft gun, when the selector lever is operated to the semi-automatic position and the trigger is pulled, the trigger switch supplies power from the battery to the drive motor, and the bevel gear receives the drive power of the drive motor. and a sector gear driven by a spur gear, the output tooth band of the intermittent gear of the sector gear retracts the piston, and then the toothless band of the intermittent gear releases the piston, and the piston is moved by the biasing force of the piston spring. The machine moves forward in response to the fire, instantly sends out the compressed air in the cylinder to the cylinder nozzle, fires a plastic bullet, and the trigger switch automatically cuts off the power supply to the drive motor every time a shot is fired. In addition, when the selector lever is operated to the full automatic position, the sector gear is continuously rotated while the trigger continues to be pulled, and the output tooth band and the missing tooth of the intermittent gear are rotated continuously. The sector gear continuously repeats the retraction and release of the piston, and fires bullets continuously at a rate of about 15 to 20 bullets per second. The tappet plate, which is linked to rotation, moves the cylinder nozzle forward and backward each time the piston moves forward and backward, and automatically loads the next bullet into the chamber of the inner barrel, so each movement of the engine section Parts are required to have high precision and durability, and there is also a market need for custom parts such as sector gears and tappet plates that can be incorporated into airsoft guns to further improve continuous fire performance. It's increasing.

(Conventional technology)
There have been many proposals that reflect this situation and provide a solution.
For example, as typified by the pump proposed in Patent Document 1 (1) below, a type of pump consisting of a piston and a cylinder is driven by the rotation of a drive motor, and thereby compressed air is sent to the cylinder nozzle every time. This allows the bullet to be ejected more accurately and the bullet to be fed in synchronization with this, and the bullet can be fired reliably by simply pulling the trigger, and these bullet feeding or firing operations are performed only by the rotation of the drive motor. It is said that an automatic air gun has already been developed that can easily fire single shots or multiple shots simply by controlling the rotation time and timing of the drive motor, and has the effect of being more compact and high-performance. Patent Document 1 (1) discloses a sector gear that includes one output tooth band and one missing tooth zone, and as seen in Patent Document 1 (2), sector gears mainly include The gear body has a joint torus that contacts the piston, and the joint torus has at least two tooth-shaped arc sections (output tooth bands) for meshing with and moving the piston. is provided with two release arc sections (missing tooth zone) separated by these two tooth-shaped arc sections (output tooth zone), and also has a cam connected to one end of the gear body, and the cam has a Two pull pins are provided to move the tappet plate, and each time each transmission gear rotates, the piston and tappet plate complete two rotations, improving the efficiency of pulling the trigger of the toy pistol. Electric gears for toy pistols, which were said to be able to be upgraded, can be seen here and there.

However, the sector gear of the airsoft gun disclosed in the former Patent Document 1 (1) and Patent Document 1 (2) basically consists of a full-periphery gear into which the rotational force of the drive motor is input via a bevel gear and a spur gear; It has an intermittent gear that intermittently outputs the rotational force input from the circumferential gear to the rack of the piston. For example, as shown in FIG. 22, the conventional sector gear C1 has a With respect to one side wall surface of gear C2 in the axial direction 4C, dimensions of various parts such as root diameter, pitch diameter, cutting edge diameter, effective tooth height, total tooth height, and tooth thickness are different from the same full-periphery gear C2. The intermittent gears C3 are arranged in an overlapping state, and a plurality of hexagon socket head bolts HS are inserted from the outer wall surface of one of the full circumferential gear C2 and the intermittent gear C3 toward the other. The two gears (C2, C3) are firmly connected to each other so that they do not shift around the axis 4C. It is an expensive custom part because it has to be manufactured as a part and then goes through multiple manufacturing processes to be assembled precisely and firmly.Furthermore, the hexagonal part is assembled into an airsoft gun and repeatedly rotates and stops. There remains a drawback that there is a risk that the bolts with holes HS, HS may become loose or damaged and fall off.
(1) Japanese Patent Publication No. 7-43238 (2) Utility Model Registration No. 3139943

(problem awareness)
As mentioned above, in the various airsoft guns that have been proposed so far, the structure of each sector gear is that it is made up of a combination of a circumferential gear and an intermittent gear that are manufactured separately, which increases the manufacturing man-hours. However, in addition to being expensive, there is a risk that the assembly parts may come loose or break, leaving issues with durability. This made me keenly aware of the possibility of developing a new sector gear structure that is cheaper and more durable, as well as an airsoft gun that incorporates it.

(Purpose of the invention)
Therefore, this invention was based on the judgment that it would be possible to develop a new sector gear technology that could significantly reduce the manufacturing process and significantly increase durability, so we quickly began the development and research. After a long period of trial and error, numerous prototypes, and experiments, we have finally succeeded in realizing a sector gear with a new structure and an airsoft gun with a new structure incorporating it. The structure thereof will be described in detail below along with representative embodiments of the invention shown in the drawings.

(Structure of the invention)
As clearly understood from the representative embodiment of the invention shown in the drawings, the sector gear of the invention basically has the following configuration.
That is, a circumferential gear portion in which input teeth are arranged over the entire circumference is provided, and on one side of the circumferential gear portion, the root circle, pitch circle, cutting edge circle, and effective tooth of the circumferential gear portion are arranged. one output tooth band in which the height, total tooth height and tooth thickness are set to be the same, and a plurality of output teeth are arranged around the axis of the full circumference gear portion, and continuous to the one output tooth band, An intermittent gear portion is integrally formed with at least one unit tooth region consisting of one toothless region zone in which no output teeth are arranged in the range from the tangent of the root circle to the distal edge, and at least one unit tooth region is arranged around the axis. In addition, the sector gear is provided with a full-circumferential gear portion and an intermittent gear portion made of one metal block.

To be more specific, the sector gear that forms the basis of this invention is provided with a full-periphery gear portion in which input teeth are arranged over the entire circumference, and one side of the full-periphery gear portion has input teeth arranged around the entire circumference. The root circle, pitch circle, cutting edge circle, effective tooth height, total tooth height, and tooth thickness of the full circumference gear part are set to be the same, and a plurality of output teeth are arranged around the axis of the full circumference gear part 1. A unit tooth area consisting of two output tooth zones, and one toothless zone that is continuous with the one output tooth zone and in which no output teeth are arranged in a range that is at least a distal edge from a tangent to the root circle. A plurality of intermittent gear parts arranged at equal angular intervals around the axis are integrally provided, and concentric rotation from each outer wall corresponding to the axis of the full circumference gear part and the intermittent gear part is provided. The sector gear has a structure in which the shaft is integrally protruded, and the full circumferential gear portion, the intermittent gear portion, and the rotating shaft are made of one metal block.

To be more specific, the sector gear that forms the basis of this invention is provided with a circumferential gear portion in which input teeth are arranged over the entire circumference, and on one side of the circumferential gear portion, The root circle, pitch circle, cutting edge circle, effective tooth height, total tooth height, and tooth thickness of the full circumference gear portion were set to be the same, and a plurality of output teeth were arranged around the axis of the full circumference gear portion. A unit tooth area consisting of one output tooth zone and one missing tooth zone continuous with the one output tooth zone and in which no output teeth are arranged at least in a range from a tangent to the root circle to a distal groove, A plurality of intermittent gear parts arranged at equal angular intervals around the axis are integrally provided, and concentric rotation from each outer wall corresponding to the axis of the full circumference gear part and the intermittent gear part is provided. The shaft is integrally protruded, and the angle range corresponds to one or several output teeth at the rear end in the rotational direction of each output tooth band on the outer wall of either the full circumference gear section or the intermittent gear section. A tappet cam is integrally provided on the outside wall of either the full circumference gear portion or the intermittent gear portion, near the rotation axis, at an angular position corresponding to the front end of each toothless region in the rotational direction. The cut-off cam is integrally protruded, and the sector gear has a configuration in which the full-periphery gear portion, the intermittent gear portion, the rotating shaft, the tappet cam, and the cut-off cam are made of one metal block.

In other words, the sector gear that forms the basis of this invention is provided with a circumferential gear portion in which input teeth are arranged over the entire circumference, and one side of the circumferential gear portion is provided with input teeth arranged around the entire circumference. , the root circle, pitch circle, cutting edge circle, effective tooth height, total tooth height, and tooth thickness of the all-around gear part are set to be the same, and a plurality of output teeth are arranged around the axis of the all-around gear part. A unit tooth area consisting of one output tooth zone, and one missing tooth zone that is continuous with the one output tooth zone and in which no output teeth are arranged at least in a range from the tangent to the root circle to the distal edge. , a total of two intermittent gear parts arranged every 180 degrees around the axis are integrally provided so as to overlap each other, and each outer wall corresponding to the axis of the full circumference gear part and the intermittent gear part Concentric rotating shafts are integrally protruded from the outer wall of either the full-circumferential gear portion or the intermittent gear portion, and one of the output teeth at the rear end in the rotational direction of the two output tooth bands. A total of two tappet cams parallel to the rotation axis are integrally protruded within an angular range corresponding to one or more tappet cams, and the rotation of the other outer wall of either the full circumference gear portion or the intermittent gear portion is A total of two cut-off cams are integrally provided in the vicinity of the shaft, at angular positions corresponding to the front ends of the two toothless regions in the rotational direction, protruding from the rotational shaft in the distal direction, and these full-periphery gear parts, This is a sector gear in which the intermittent gear part, the rotating shaft, the tappet cam, and the cutoff cam are made of one metal block.

(Related invention 1)
In relation to the sector gear that forms the basis of the invention described above, the invention also includes an airsoft gun incorporating the sector gear.
That is, the mechanical box has a cylinder mounting part at the top, a trigger unit mounting part at the front lower part of the cylinder mounting part, and a drive gear mounting part at the rear lower part of the cylinder mounting part, and the cylinder mounting part of the mechanical box. The section is provided with a cylinder in which a cylinder nozzle is arranged in the front cylinder head, and a tappet plate that extends from the base end of the cylinder nozzle to the drive gear attachment part and is movable back and forth integrally with the cylinder nozzle. A piston having a rack provided on the outer peripheral wall near the rear end is inserted into the rear end opening of the cylinder so as to be able to move forward and backward, and the piston is provided with a piston spring that biases it forward, The trigger unit mounting part is provided with a trigger having a trigger switch, and the drive gear mounting part includes a spur gear that receives input from the drive motor, a peripheral gear part that receives the input from the spur gear, and an intermittent gear. The sector gear according to any one of the above, which transmits the output of the section to the rack of the piston, and which engages with the cut-off cam of the sector gear, depending on the safety, semi-automatic or full automatic position of the selector lever, An airsoft gun incorporating a sector gear according to any one of the above, wherein a cut-off lever for operating a trigger switch is provided, and a slipper portion at a rear end of the tappet plate is arranged to engage with a tappet cam of the sector gear. be.

As described above, according to the sector gear that forms the basis of the present invention, unlike the previous ones, due to the unique and characteristic configuration described above, the tooth Since the base circle, pitch circle, cutting edge circle, effective tooth height, total tooth height, and tooth thickness are set to be the same, the full circumference gear part and the intermittent gear part can be easily and efficiently machined from a single metal block. In addition to being much more efficient and economical to manufacture, this method is much more efficient and economical than conventional gears, in which the full circumferential gear part and the intermittent gear part are made up of separate parts, and are assembled into one body by bolts or the like. The outstanding features are that the number of parts can be significantly reduced, much higher durability and strength can be obtained, and better wear resistance and impact resistance can be achieved.

In addition, the all-around gear part, the intermittent gear part, and the rotating shaft made of a single metal block further reduce the number of parts and prevent misalignment or falling out between the rotating shaft and the all-around gear part and the intermittent gear part. This solves problems such as malfunctions and provides a more durable and highly accurate sector gear.Furthermore, the all-round gear part, the intermittent gear part, the rotating shaft, the tappet cam, and the cut-off cam are all made of a single metal block. According to the sector gear of the present invention, which is made up of Not only that, but also the durability and strength of the sector gear can be greatly increased.

And, according to the airsoft gun incorporating the sector gear of this invention, it can be manufactured much more economically than those incorporating the conventional sector gear, and it is more durable. Furthermore, in the case where the intermittent gear portion of the sector gear, which forms the basis of this invention, is provided with a plurality of unit tooth areas each consisting of an output tooth band and a tooth area band, During one rotation of the sector gear, the piston reciprocates the number of times equal to the number of unit tooth areas, and bullets equal to the number of unit tooth areas are fired, resulting in better rapid firing performance. The advantage is that you can.

According to the airsoft gun of the present invention in which the cutoff lever is replaced with an electric cutoff mechanism, it is possible to easily change the arrangement and angular posture of the electronic switch, and freely adjust the detection timing. In an electronic circuit or program that processes a detection signal of an electronic switch, the detection timing can be adjusted back and forth, and the trigger switch operation timing can be adjusted more highly and with high precision.

Further, according to the airsoft gun of the present invention in which the cutoff lever is replaced with an optical cutoff mechanism, the optical switch consisting of the light emitting element and the light receiving element can detect the cutoff cam of the sector gear without contact. Because of this, it can be made to have better wear resistance and impact resistance than those that operate with mechanical contact, and can be used in electronic circuits and programs that process detection signals of optical switches. By adjusting the timing back and forth, the operation timing of the trigger switch can be adjusted more highly and with high precision.

Furthermore, the airsoft gun of the present invention in which the cutoff lever is replaced with an electromagnetic cutoff mechanism has an electromagnetic switch consisting of a permanent magnet and a magnetic sensor, so that the permanent magnet can be detected without contact. The detection timing can be adjusted back and forth in the electronic circuits and programs that process the detection signal of the electromagnetic switch, and the trigger switch operation timing can be adjusted to a higher level and with better resistance to impact. It can be adjusted with high precision, and the operability of the airsoft gun can be improved more easily and freely.

When carrying out the present invention having the configuration as described above, the best or preferable form thereof will be explained below.
An airsoft gun is a toy gun that fires, for example, a BB (Ball Bullet or Ball Bearing) bullet, which is a spherical plastic bullet, by utilizing the force of the gas that is taken inside. The supplied drive motor drives a piston and fires a bullet, making it a so-called electric gun, and it can be said to be capable of semi-automatic or fully automatic operation.

The mechanical box incorporates engine parts including the sector gear, which is the basis of this invention, and shares the function of being installed in an accurate position inside the airsoft gun. A trigger unit mounting part may be provided at the front lower part of the mounting part, and a drive gear mounting part may be provided at the rear lower part of the cylinder mounting part.More specifically, a cylinder and a piston may be provided at the cylinder mounting part. In addition, the sector gear and the tappet plate must be installed in the drive gear mounting portion at positions where they can operate accurately relative to each other, and as shown in the embodiments described below, the trigger unit mounting portion must also include a trigger, It is preferable that the trigger switch has a cut-off lever, a super gear, a bevel gear, a reversal prevention latch, etc. incorporated in the drive gear mounting portion.

The cylinder receives the reciprocating movement of the piston and has the function of securing a sealed space so that the airsoft gun can supply compressed air to the cylinder nozzle to fire the bullet. An air supply port should be opened in the peripheral wall near the end, and the base end of the cylinder nozzle should be loosely fitted into the injection pipe part protruding from the center of the tip of the cylinder, so that it can move forward and backward. As shown in the figure, a frame-shaped cylinder head that can guide the front end of the tappet plate in a forward and backward movement can be integrated around the outer periphery of the tip of the cylinder.

The cylinder nozzle has the function of automatically supplying the next bullet one by one into the chamber at the rear end of the inner barrel, which is located along the front end of the cylinder's injection tube, in accordance with the timing of the reciprocating movement of the piston. More specifically, it is moved forward and backward by the tappet plate that follows the rotation of the sector gear, and when the piston begins to retreat, the cylinder nozzle moves back in conjunction with this, supplying the next bullet into the chamber. Immediately before the piston starts moving forward, the cylinder nozzle moves forward to close the chamber, and the piston moves forward to fire the bullet. As shown in the figure, the outer circumferential wall of the base end of the cylinder nozzle has a fitting groove that can fit into the tip of the tappet plate.

The piston receives intermittent rotational force from the sector gear and moves backward against the forward biasing force of the piston spring. When air is drawn into the cylinder and released from the sector gear, the piston spring The projector moves forward in response to the biasing force and injects compressed air from the cylinder nozzle to fire the bullet. More specifically, the inner wall of the cylinder An O-ring made of synthetic rubber, natural rubber, or other elastic material is fitted to ensure air compression performance, and also faces the intermittent gear of the sector gear of the piston. A rack that meshes with the intermittent gear part of the sector gear is carved along the different outer peripheral wall, and the tip of the piston spring is inserted from the rear end of the piston. As shown in Figure 2, the entire rack, or one tooth (or any one of several teeth) located near the piston head in the rack and to which the most shearing load is applied. ) may be made of reinforced metal and may be integrally and firmly implanted into the peripheral wall of the piston.

The rack of the piston meshes with the output tooth band of the intermittent gear part of the sector gear, and receives the rotational force from the sector gear and can convert it into a linear retraction force of the piston. When faced with a toothless region of the gear section, the sector gear disengages the piston and the piston receives the elastic biasing force of the piston spring and shares the function of allowing the piston to move forward. It is preferable that the piston be provided over a front and back range corresponding to the length of the forward and backward movement of the piston from the piston head side to the rear end area corresponding to the intermittent gear part of the sector gear of the piston, and will be described later. As shown in the example below, a guide rail in the longitudinal direction that can prevent the piston from rotating in the circumferential direction is carved with respect to the axis of the piston in the longitudinal direction. A regulating protrusion provided on either side of the exterior frame may be slidably engaged with the guide rail to prevent the piston from inadvertently rotating around the circumference. .

The piston spring accumulates a biasing force to move the piston forward as the piston moves backward, and also instantaneously and forcibly moves the piston forward to turn the air in the cylinder into compressed air. The nozzle shares the function of being able to send out the compressed air, and more specifically, the tip is inserted into the rear end opening of the piston, and the rear end is inserted into the mechanical box, the exterior frame of the airsoft gun, or the stock part. It is preferable to engage with any other parts such as a grip, and it can be a compression coil spring with a spring guide (not shown) fitted to the rear end.

The tappet plate is linked to the rotational movement of the sector gear and shares the function of moving the cylinder nozzle back and forth with respect to the cylinder head. It is responsible for the function of starting the retraction of the nozzle and completing the advancement of the cylinder nozzle just before the piston begins to advance, and more specifically, as shown in the embodiments described later, the sector gear A slipper part is slidably engaged with the tappet cam, a nozzle fitting part is detachably fitted to the base end of the cylinder nozzle, and the slipper part and the nozzle fitting part are integrally connected. It has a slider plate part that is supported so as to move forward and backward along the guide, and is further provided with an elastic biasing device part that resiliently biases the tappet plate in the forward direction with respect to the mechanical box and the cylinder. is good.

The sector gear forms the basis of this invention, and when the selector lever is operated to the semi-automatic cook position, the trigger is pulled and the trigger switch is turned on, and the sector gear is used to drive the drive motor. When subjected to force, it rotates in a certain direction, moves the piston backward, moves it forward, and after one stroke, the trigger switch is automatically turned OFF and rotation is stopped, and the selector lever is in the fully automatic position. When operated, the trigger switch remains ON while the trigger is pulled, and the sector gear rotates in a certain direction when receiving the driving force from the drive motor, moving the piston backward and forward. One stroke is repeated continuously (multiple strokes), and when the trigger pull operation is released, the trigger switch is turned OFF and the rotation is stopped. While the sector gear is being rotated, the tappet cam operates the tappet plate, and when the selector lever is operated to the safety position, the cutoff lever is disengaged from the cutoff cam and the trigger switch is activated. When the cut-off lever is turned OFF and the firing operation is stopped regardless of the trigger operation, and the selector lever is moved to the semi-automatic position, the cut-off lever can slide freely in the semi-automatic position relative to the cut-off cam. is engaged, the trigger is pulled, and each time one shot firing (one stroke operation) is completed, the trigger switch is turned OFF to stop the firing operation, and furthermore, the selector lever is operated to each full automatic position. In this case, the cut-off lever is slidably engaged with the cut-off cam in a fully automatic position, and continuous firing (multi-stroke operation) continues as long as the trigger is pulled, causing the trigger to fire continuously. When the pull operation is released, the trigger switch is turned OFF and the firing operation is stopped.

To be more specific, the sector gear that forms the basis of this invention is provided with a circumferential gear portion in which input teeth are arranged over the entire circumference, and on one side of the circumferential gear portion, one output tooth band in which a plurality of output teeth are arranged around the axis of the full-periphery gear portion, and continuous to the one output tooth band, at least in a range from a tangent to the tooth root circle to a distal groove. An intermittent gear section is integrally provided with at least one unit tooth region consisting of one toothless region zone in which no output tooth is arranged along the axis, and the output of the full circumference gear section and the intermittent gear section is The tooth bands are set to have the same root circle, pitch circle, cutting edge circle, effective tooth height, total tooth height, and tooth thickness, and the full circumference gear part and the intermittent gear part are made from one metal block. More specifically, concentric rotating shafts should be integrally protruded from each outer wall corresponding to the axis of the full-periphery gear portion and the intermittent gear portion, and the entire circumference should be It should be a sector gear in which the gear part, the intermittent gear part, and the rotating shaft are made of a single metal block. The tooth root circle, pitch circle, cutting edge circle, effective tooth height, total tooth height, and tooth thickness of this all-around gear part are set to be the same on one side of the all-around gear part, and the axis center of this all-around gear part is set to be the same. One output tooth band around which a plurality of output teeth are arranged, and one missing part that is continuous with the one output tooth band and in which no output teeth are arranged at least in a range from a tangent to the root circle to a distal groove. An intermittent gear part in which only one unit tooth area consisting of a tooth area band is arranged over 360 degrees around the axis is integrally provided, and the full circumference gear part and the intermittent gear part are made of one metal. It is possible to have a sector gear made of blocks.

As shown in the embodiments described below, the sector gear that forms the basis of this invention is provided with a circumferential gear portion in which input teeth are arranged over the entire circumference, and a circumferential gear portion is provided on one side of the circumferential gear portion. On the other hand, the root circle, pitch circle, cutting edge circle, effective tooth height, total tooth height, and tooth thickness of the full circumference gear part are set to be the same, and a plurality of output teeth are set around the axis of the full circumference gear part. A unit tooth consisting of one output tooth zone arranged in an array, and one missing tooth zone that is continuous with the one output tooth zone and in which no output teeth are arranged in a range that is at least a distal edge from a tangent to the root circle. A plurality of intermittent gear parts are integrally arranged at equal angular intervals around the axis, and from each outer wall corresponding to the axis of the full circumference gear part and the intermittent gear part, respectively. A concentric rotating shaft is integrally provided and protrudes from one or several of the output teeth at the rear end in the rotational direction of each output tooth band on the outer wall of either the full circumference gear portion or the intermittent gear portion. A tappet cam parallel to the rotation axis is integrally provided within a corresponding angular range, and each toothless region band is provided near the rotation axis on the other outer wall of either the full circumference gear portion or the intermittent gear portion. A cut-off cam is integrally protruded from the rotating shaft in the centrifugal direction at an angular position corresponding to the front end in the rotational direction of the rotary shaft. Preferably, the sector gear is made of a metal block.

Furthermore, as shown in the embodiments described below, the sector gear that forms the basis of this invention is provided with a circumferential gear portion in which input teeth are arranged over the entire circumference, and a circumferential gear portion is provided on one side of the circumferential gear portion. On the other hand, the root circle, pitch circle, cutting edge circle, effective tooth height, total tooth height, and tooth thickness of this all-around gear are set to be the same, and multiple output teeth are arranged around the axis of the same all-around gear. A unit tooth consisting of one output tooth zone arranged in an array, and one missing tooth zone that is continuous with the one output tooth zone and in which no output teeth are arranged in a range that is at least a distal edge from a tangent to the root circle. A total of two intermittent gear parts are arranged at intervals of 180° around the axis, and are integrally provided so as to overlap each other, and the area corresponds to the axis of the full circumference gear part and the intermittent gear part. Concentric rotating shafts are integrally protruded from each outer wall, and each output tooth at the rear end in the rotational direction of the two output tooth bands on the outer wall of either the full circumference gear section or the intermittent gear section. A total of two tappet cams parallel to the rotating shaft are integrally provided in an angular range corresponding to one or several tappet cams, and the outside wall of either the full circumference gear portion or the intermittent gear portion is A total of two cut-off cams are integrally provided in the vicinity of the rotating shaft, at angular positions corresponding to the front ends of the two toothless regions in the rotational direction, and protrude from the rotating shaft in the distal direction. The gear portion, the intermittent gear portion, the rotating shaft, the tappet cam, and the cut-off cam may be made of a single metal block, and the unit tooth areas may be provided at a total of three locations every 120° around the axis. Alternatively, the unit tooth areas may be arranged alternately every 90 degrees around the axis, and furthermore, many unit tooth areas may be arranged around the axis. They may be arranged at equal angles around the center.

The full-periphery gear part of the sector gear shares the function of receiving the motor drive force from the spur gear to enable the sector gear to rotate continuously, and has teeth around the entire circumference that efficiently mesh with the output teeth of the spur gear. In addition, the dimensions shall be set to be the same as the root circle, pitch circle, cutting edge circle, effective tooth height, total tooth height, and tooth thickness of the output tooth of the output tooth band of the intermittent gear part. Rather, it should be integrated with at least the intermittent gear part, and more specifically, the intermittent gear part and the circumferential gear part should be made of one metal block, and should correspond to the axis of the full circumferential gear part. It is preferable that a concentric rotating shaft protrudes integrally from each outer wall of the full circumferential gear portion, and each of the toothless areas of the intermittent gear portion is located near the rotating shaft of the outer wall of the full circumference gear portion. A cut-off cam may be integrally protruded at an angular position corresponding to the front end of the belt in the rotational direction, and as shown in the embodiment described later, the outer wall of the full-periphery gear portion The tappet cam may be integrally provided within an angular range corresponding to one or several output teeth at the rear end in the rotational direction of each output tooth band of the intermittent gear portion.

The intermittent gear part of the sector gear intermittently meshes with the rack of the piston, and when it meshes with the rack while the sector gear is rotating, it transmits the rotational force of the sector gear to the piston, causing the piston spring to spring. It shares the function of retracting the piston against force and opening the piston so that it can move forward if it does not engage. one output tooth zone in which the height and tooth thickness are set to be the same, and a plurality of output teeth are arranged around the axis of the full-periphery gear portion; At least one unit tooth region consisting of one toothless region where no output tooth is arranged in the range from the tangent of the circle to the distal edge is arranged around the axis, and at least the full circumferential gear portion and the intermittent The gear part must be made of a single metal block, and more specifically, a concentric rotating shaft should be integrally protruded from each outer wall corresponding to the axis of the intermittent gear part. Preferably, a cut-off cam is integrally protruded at an angular position corresponding to the front end of each toothless region of the intermittent gear section in the rotational direction, near the rotation axis on the outer wall of the intermittent gear section. In addition, as shown in the embodiment described later, the output teeth at the rear end in the rotational direction of each output tooth band of the intermittent gear section on the outer wall of the intermittent gear section. A tappet cam is integrally protruded within an angular range corresponding to one or more of the teeth, and the full circumferential gear portion, intermittent gear portion, rotating shaft, tappet cam, and cut-off cam are made of a single metal block. I can do it.

The output tooth band of the intermittent gear portion of the sector gear is ensured to mesh with the rack of the piston, shares the function of retracting the piston as the sector gear rotates, and retracts the piston by a sufficient distance. If the number of teeth is less than that, the piston will not move back enough, and if the number of teeth is too large, the piston will There is a risk that the amount of retraction of the sector gear may become too large, or that the output teeth may exceed the range of the rack of the piston and interfere with the outer circumferential wall of the piston. The zone follows the output tooth zone and shares the function of opening the piston so that it can move forward as the sector gear rotates, and the output teeth are arranged at least in a range from a tangent to the root circle to a distal zone. If the missing tooth area is placed slightly beyond the range of the distal edge from the tangent to the root circle in the circumferential direction, the piston Although it is possible to more reliably prevent the output teeth from interfering with the outer peripheral walls of the rack and piston, if the tooth-missing area band is disposed excessively wide in the circumferential direction, the unit tooth area will expand. , there is a risk that the time required for the piston to advance and retreat will increase and the rapid firing performance will be impaired.Also, if the output tooth is located within the range of the distal groove from the tangent to the bottom circle, the piston There is a risk that the output teeth will interfere with either the rack or the outer circumferential wall of the piston, and the piston will not be able to advance and retreat smoothly.

The rotary shaft has the function of rotatably attaching the sector gear to a predetermined position on the side of the main body of the airsoft gun, and corresponds to the axis of rotation of the full circumference gear part and the intermittent gear part of the sector gear. For example, each of the outer walls corresponding to the axis of rotation of the full-circumferential gear section and the intermittent gear section should protrude concentrically from each of the outer walls. In addition to being implanted so that they are concentric with each other, both ends protrude from the respective outer walls at locations corresponding to the axes of rotation of the full circumferential gear portion and the intermittent gear portion. Furthermore, as shown in the examples described later, the full circumferential gear part, the intermittent gear part and the rotating shaft are made of a single metal block. It is possible to make it a thing.

A sector gear that is made of a single metal lump must be manufactured to be made of a single metal lump by at least one of casting, die-casting, firing, or forging. In addition, it can be said that a metal lump is manufactured by cutting, electrical discharge machining, laser processing, water jet processing, or other processing to make it into a single metal lump. In particular, in the sector gear that forms the basis of this invention, the full circumferential gear portion and the intermittent gear portion are set to have the same root circle, pitch circle, cutting edge circle, effective tooth height, total tooth height, and tooth thickness. Therefore, it is possible to significantly improve production efficiency when manufactured by cutting.

The tappet cam is slidably engaged with the slipper portion of the tappet plate, and moves the tappet plate in conjunction with the rotation of the sector gear to move the cylinder nozzle forward and backward as the piston retreats, and before the piston starts moving forward. It is responsible for the function of operating the cylinder nozzle to move forward, and more specifically, the output tooth at the rear end in the rotational direction of each output tooth band on the outer wall of either the full circumference gear section or the intermittent gear section. They must be integrally protruded within an angular range corresponding to one or several tappet plates, and arranged so that only the one closest to the slipper part of the tappet plate is slidably engaged. As shown in the examples described later, one of the output teeth at the rear end of each output tooth band in the rotational direction of the outer wall of either the full circumference gear part or the intermittent gear part. It is preferable that each of the parts within an angular range corresponding to one or more parts be integrated in a protruding posture parallel to the rotation axis.

The cutoff cam is slidably engaged with the cutoff lever, and when the selector lever is operated to the safety position, the cutoff lever and cutoff cam are disengaged and the trigger is operated. Regardless of the trigger switch being operated in the OFF position, when the selector lever is operated to the semi-automatic position and the trigger is pulled, the cut-off lever is equivalent to the cut-off cam and one shot. After the trigger switch is engaged only once, the trigger switch is turned OFF, and if the selector lever is operated to the full automatic position and the trigger is pulled, while the trigger is continued to be pulled. Throughout, the cutoff lever continues to be slidably engaged with each cutoff cam, the ON state of the trigger switch is maintained, and when the trigger pull operation is released, the trigger switch is operated to be turned OFF. More specifically, there is an angle corresponding to the output tooth at the front end of each output tooth band in the rotational direction on the outer wall of the other of the full circumference gear portion or the intermittent gear portion, near the rotation axis. The cut-off lever should be integrally protruded at the position, and should be arranged so that only the one closest to the point where the cut-off lever is to be engaged is slidably engaged; As shown in the examples described later, an angle corresponding to the output tooth at the front end of each output tooth band in the rotational direction is provided on the outer wall of the other of the full circumference gear portion or the intermittent gear portion, near the rotation axis. It is preferable that the rotation shaft be integrally provided at a position protruding from the rotating shaft in the centrifugal direction.

The trigger is operated by a user of an airsoft gun incorporating a sector gear, which is the basis of this invention, when the user intends to fire a bullet from the airsoft gun, and when the trigger is pulled, the airsoft gun fires a bullet. The function of the trigger changes depending on the position of the selector lever, and when the selector lever is in the safety position, the trigger switch is turned OFF, and when the trigger is pulled. Even if the bullet is not fired and the selector lever is in the semi-automatic position, if you pull the trigger, the trigger switch will be turned ON, and after one shot is fired, the trigger switch will be turned OFF. , once the trigger is released and then pulled again, the trigger switch is turned ON, one shot is fired, and then the trigger switch is turned OFF. If you pull the trigger when the lever is in the full automatic position, the trigger switch will remain ON for as long as you continue to pull the trigger, and fire will continue during that time, and when you release the trigger, the trigger switch will turn ON. When the OFF operation is performed, bullet firing is stopped, and the trigger is pulled again, the trigger switch continues to be ON while the same trigger is being pulled, and during that time, continuous firing is performed, and when the trigger pull operation is released, The trigger switch functions to stop firing bullets when the trigger switch is turned OFF, and the trigger has its base end pivoted to either the mechanical box or the frame of the airsoft gun, and the selector lever is in a position other than the safety position. Moreover, a trigger switch is provided that is turned on when the trigger is pulled, and furthermore, when the pulling force of the trigger is released, the trigger can elastically return to the initial pulling position. It is preferable that a trigger spring is provided to do so.

The cut-off lever cooperates with the rotation of the sector gear, which is the basis of this invention, depending on the safety, semi-automatic, or full automatic position of the selector lever, and when the selector lever is in the safety position, Regardless of whether or not the trigger is pulled, when the trigger switch is turned OFF and the selector lever is in the semi-automatic position, when the trigger is pulled, the trigger switch is activated in conjunction with the rotation of the sector gear. After turning ON to fire one shot, the trigger switch is automatically turned OFF, and when the selector lever is in the fully automatic position, the trigger is pulled in conjunction with the rotation of the sector gear. The trigger switch continues to be turned ON while the trigger is being pulled to fire continuously, and when the trigger is released, the trigger switch is turned OFF. For example, the middle part of the cutoff lever is pivotally supported by the mechanical box, the front end of the cutoff lever is arranged so that it can be turned off with respect to the trigger switch, and the rear end of the cutoff lever is connected to the cutoff of the sector gear. Between the middle part, which is slidably engaged with the cam and is pivotally supported by the mechanical box of the cut-off lever, and the front end of the cut-off lever, there is provided a lock according to each position of safety, semi-automatic, and full automatic. Preferably, a selector lever that changes the attitude of the cutoff lever is engaged.

Further, as shown in the embodiments described later, the cutoff lever can be replaced with an electric cutoff mechanism having an electronic switch that mechanically contacts the cutoff cam. An optical cut-off mechanism that has an optical switch consisting of a light-emitting element and a light-receiving element that can detect the cut-off cam without contact, or an electromagnetic cut-off mechanism that has a permanent magnet and a magnetic sensor that can detect the cut-off cam without contact. It is possible to replace the electromagnetic cut-off mechanism with a switch, etc.

The spur gear rotates in response to input from the bevel gear, and also shares the function of outputting rotational driving force to the sector gear.In addition to being composed of a single input and output gear, the spur gear has a pitch circle that is different from that of the other. It is possible to integrate an input gear and an output gear with different diameters so that they are superimposed on the same axis, and when it consists of a single input and output gear, the input and output gears In addition, in the case of an input gear and an output gear, the output gear must mesh with at least the entire circumferential gear portion of each sector gear, and furthermore, in the case of a single input and output gear, The input and output gears are meshed so that they straddle both the full-periphery gear section of the sector gear and the output tooth band of the intermittent gear section, respectively. It is preferable that it be pivotally supported by a mechanical box.

The bevel gear shares the function of transmitting the rotational output of the drive motor to the spur gear, and as shown in the examples described later, the bevel gear part meshes with the bevel gear type pinion gear of the drive motor. It is preferable that the output gear be disposed on the same axis as the bevel gear portion and meshed with the spur gear, and be pivotally supported by a mechanical box.

The anti-reverse latch has the function of preventing the sector gear from reversing, for example, the sector gear, the spur gear, the bevel gear, or the pinion gear of the drive motor. More specifically, a ratchet pawl is pivotally supported on a mechanical box so as to be engaged with at least one of a sector gear, a spur gear, a bevel gear, or a pinion gear of a drive motor so as to prevent reverse rotation; The ratchet spring may be configured to elastically bias the ratchet pawl in the engaging direction, and as shown in the examples described later, the rotation of the drive motor can be more effectively prevented from reversing. Preferably, it consists of a ratchet pawl and a ratchet spring that engages the output gear of a bevel gear close to the drive motor.
In the following, the structure thereof will be explained in detail together with representative embodiments of the present invention shown in the drawings.

The drawings show several representative embodiments embodying the technical concept of the sector gear of the present invention and an airsoft gun incorporating the sector gear.
FIG. 2 is a perspective view showing a sector gear that forms the basis of this invention. FIG. 2 is a perspective view of the sector gear, which forms the basis of this invention, seen from another angle. FIG. 2 is a front view showing a sector gear that forms the basis of this invention. FIG. 2 is a rear view showing a sector gear that forms the basis of this invention. FIG. 2 is a plan view showing a sector gear that forms the basis of this invention. FIG. 2 is a side view showing a sector gear that forms the basis of this invention. It is a side view showing the inside of the mechanical box of the airsoft gun of this invention. FIG. 3 is a side view showing the inside of the mechanical box with the piston retracted. It is a side view showing the inside of the mechanical box with the piston moving forward. It is a perspective view showing a sector gear and a cutoff lever. FIG. 3 is a perspective view showing a cutoff lever for turning off a trigger switch. FIG. 3 is a perspective view showing an electrical cutoff mechanism replaced by a cutoff lever. FIG. 3 is a perspective view showing the operating state of the electrical cutoff mechanism. FIG. 3 is a perspective view showing an optical cutoff mechanism replaced by a cutoff lever. FIG. 3 is a perspective view showing the operating state of the optical cutoff mechanism. FIG. 3 is a perspective view showing an electromagnetic cutoff mechanism replaced by a cutoff lever. FIG. 3 is a perspective view showing the operating state of the electromagnetic cutoff mechanism. It is a front view showing a sector gear in which a total of three unit tooth areas are arranged. FIG. 2 is a rear view showing a sector gear in which a total of three unit tooth areas are arranged. It is a front view showing a sector gear in which a total of four unit tooth areas are arranged. FIG. 3 is a rear view showing a sector gear in which a total of four unit tooth areas are arranged. FIG. 2 is a perspective view showing a conventional sector gear.

In the examples shown in FIGS. 1 to 6, a full-periphery gear portion 2 is provided with input teeth 20, 20, . . . arranged over the entire circumference. The root circle BC, pitch circle PC, cutting edge circle TC, effective tooth height EH, total tooth height TH, and tooth thickness TT of the peripheral gear part 2 are set to be the same, and around the axis 4C of the peripheral gear part 2. One output tooth band 31 in which a plurality of output teeth 32, 32, . . . A unit tooth region 30 consisting of one toothless region band 33 in which no tooth 31 is arranged is integrally provided with a plurality of intermittent gear parts 3 arranged at equal angle intervals around the axis 4C, and the full circumference gear This figure shows a typical embodiment of the sector gear of the present invention, in which the section 2 and the intermittent gear section 3 are made of one metal block.

As can be clearly understood from each of these figures, the sector gear 1 of the present invention has, over the entire circumference, a root circle BC with a diameter DA, a pitch circle PC with a diameter DB, a cutting edge circle TC with a diameter DC, and an effective tooth height. EH, a full circumferential gear part 2 in which input teeth 20, 20, . . . with a full tooth height TH and a tooth thickness TT are arranged is provided. The intermittent gear portion 3 has a root circle BC with a diameter DA, a pitch circle PC with a diameter DB, a cutting edge circle TC with a diameter DC, and an effective tooth height. EH, total tooth height TH and tooth thickness TT are set to be the same, and one output tooth band 31 in which a plurality of output teeth 32, 32, . . . are arranged around the axis 4C of the full circumference gear portion 2; , a unit tooth area consisting of one toothless area band 33 that is continuous with the one output tooth band 31 and in which no output tooth 32 is arranged in a range CS that is distal from the tangent line TG of the root circle BC of diameter DA. 30 are arranged at intervals of 180 degrees around the axis 4C.

Concentric rotating shafts 4, 4 are integrally protruded from each outer wall corresponding to the axis 4C of the full circumferential gear portion 2 and the intermittent gear portion 3, and the outer wall of the intermittent gear portion 3 is In the rotational direction α of the two output tooth bands 31, 31, in the angular range β corresponding to several teeth (for example, 1 to 4 teeth) of the output teeth 32 at the rear end of each of the two output tooth bands 31, 31, A total of two tappet cams 5, 5 having an arcuate shape and erected in parallel to the rotating shaft 4 are integrally arranged, and a tappet cam 5, 5 is disposed integrally on the outer wall of the circumferential gear portion 2 near the rotating shaft 4. , a total of two cut-off cams 6, 6 are placed at angular positions corresponding to the front ends of the two toothless region bands 33, 33 in the rotational direction α, so that each tip thereof is oriented in the distal direction. , integrally protrudes from the rotating shaft 4 in the centrifugal direction, and the full circumferential gear portion 2, the intermittent gear portion 3, the rotating shafts 4, 4, the tappet cams 5, 5, and the cut-off cams 6, 6 are made of one metal piece. It is made by cutting from a block.

Further, the sector gear 1, which is the basis of the present invention, has a unit tooth area 30 in which one output tooth band 31 and one toothless area band 33 are connected, as shown in FIGS. 18 and 19, for example. are arranged every 120 degrees around the rotation axis 4 of the intermittent gear part 3, and the output of each rear end in the rotation direction α of the three output tooth bands 31, 31, 31 on the outer wall of the intermittent gear part 3 Each of the three teeth 32 has a circular arc shape in the circumferential direction of the rotary shaft 4 and is erected parallel to the rotary shaft 4 within the angular range β corresponding to several teeth 32 (for example, 1 to 4 teeth). Tappet cams 5, 5, 5 are integrally arranged, and three toothless region bands 33, 33, 33 are arranged in the rotation direction α on the outer wall of the full circumference gear portion 2, in the vicinity of the rotation shaft 4. A total of three cut-off cams 6, 6, 6 are integrally protruded from the rotary shaft 4 in the centrifugal direction at angular positions corresponding to the front ends of each of the cut-off cams 6, 6, 6, so that each tip thereof is oriented in the centrifugal direction. The full circumference gear part 2, the intermittent gear part 3, the rotating shafts 4, 4, the tappet cams 5, 5, 5, and the cut-off cams 6, 6, 6 are machined from a single metal block. It can be done.

Furthermore, as shown in FIGS. 20 and 21, the sector gear 1 that forms the basis of the present invention has a unit tooth area in which one output tooth band 31 and one toothless area band 33 are connected. 30 are arranged every 90 degrees around the rotation axis 4 of the intermittent gear part 3, and the outer wall of the intermittent gear part 3 is arranged at the rear of each of the four output tooth bands 31, 31, 31, 31 in the rotation direction α. Each of the teeth within the angular range β corresponding to several output teeth 32 (for example, 1 to 4 teeth) at the end has a circular arc shape in the circumferential direction of the rotating shaft 4, and is erected parallel to the rotating shaft 4. A total of four tappet cams 5, 5, 5, 5 are integrally arranged, and four missing tooth region bands 33, 33, This rotation is performed so that a total of four cut-off cams 6, 6, 6, 6 are placed at angular positions corresponding to the front ends of the cams 33, 33 in the rotational direction α, with their respective tips facing in the centrifugal direction. They integrally protrude from the shaft 4 in the centrifugal direction, and include the full circumferential gear portion 2, the intermittent gear portion 3, the rotating shafts 4, 4, the tappet cams 5, 5, 5, 5, and the cut-off cams 6, 6, 6, 6 can be formed by cutting from a single metal block.

(Actions and effects of Example 1)
As shown in FIGS. 1 to 6, the sector gear 1, which is the basis of the present invention and has the above-described configuration, includes input teeth 20, 20, . Since the root circle BC, pitch circle PC, cutting edge circle TC, effective tooth height EH, total tooth height TH and tooth thickness TT of the output teeth 32, 32, ... are set to be the same, the full circumference gear portion 2 , the intermittent gear portion 3, the rotating shafts 4, 4, the tappet cams 5, 5, and the cut-off cams 6, 6 can be formed by cutting from a single metal block, as in the conventional product shown in FIG. Compared to a case where the circumferential gear portion 2 and the intermittent gear portion 3, which are individually machined, are connected using hexagon socket head bolts HS, HS, damage and loosening of the hexagon socket head bolts HS, HS, etc. In addition to eliminating the troubles caused by this process, the number of parts can be reduced, and there is no need for assembly after cutting, so the number of manufacturing steps and the burden of parts management can be significantly reduced.

In the case shown in FIGS. 1 to 11, the mechanical box MB is provided with a cylinder S in which a cylinder nozzle SN is arranged in the front cylinder head SH, and is movable back and forth integrally with the cylinder nozzle SN. A piston P, which is provided with a tappet plate TP and a rack R, is inserted into the rear end opening RP of the cylinder S so as to be able to move forward and backward.The piston P is provided with a piston spring PS, and the piston P is provided with a rack R. On the other hand, a trigger TR having a trigger switch TS is disposed, and a spur gear SG is connected to the mechanical box MB, and the input from the spur gear SG is received by the circumferential gear part 2, and the output of the intermittent gear part 3 is transmitted to the piston P. A sector gear 1, which is the basis of this invention, transmits information to the rack R, and a cut-off lever CR that engages with the cut-off cams 6, 6 of the sector gear 1 is provided. This figure shows a typical embodiment of an airsoft gun in which a sector gear 1, which is the basis of the present invention, is arranged so that the rear end of the tappet plate TP is engaged with the sector gear 1.

As can be clearly understood from these figures, the airsoft gun G in which the sector gear 1, which is the basis of the present invention, is incorporated has a mechanical box MB built into an outer frame imitating the appearance of an assault rifle. The box MB is divided into half pieces from the center between the left and right sides, parts are assembled, and the left and right sides are closed and screwed together. B1, a trigger unit mounting part B2 is secured at the front lower part of the cylinder mounting part B1, and a drive gear mounting part B3 is secured at the rear lower part of the cylinder mounting part B1. An injection tube part TB is protruding from the center of the tip, and a cylinder S is arranged with an air supply port AP on the peripheral wall near the base end and a rear opening RP at the rear end, and the outer periphery of the cylinder S except for the lower part. A short cylindrical cylinder head SH extends from the tip of the wall so as to surround the injection tube section TB, and the injection tube section TB is equipped with a base end of a cylinder nozzle SN that can move forward and backward. A semicircular arc-shaped fitting groove FG is carved in the lower half of the outer periphery of the base end of the nozzle SN.

The tappet plate TP has a slider plate part SP that is supported so as to be movable back and forth in the front and rear directions parallel to the cylinder S along the guide part of the mechanical box MB, and is raised upward from the front end of the slider plate part SP, and has an upper end. A tongue-shaped nozzle fitting part NF having a roughly U-shaped fitting groove recessed therein is fitted into the fitting groove FG at the base end of the cylinder nozzle SN, and is fitted into the fitting groove FG at the base end of the cylinder nozzle SN, and is fitted into the fitting groove FG at the base end of the cylinder nozzle SN. A slipper part SL is suspended from the rear end extending to the drive gear attachment part B3, and a small slipper part SL is provided between the midway part of the slider plate part SP and the opposing part of the mechanical box MB. An elastic biasing unit EU made of a tension coil spring is provided under tension, and always elastically biases the tappet plate TP and the cylinder nozzle SN toward the front.

An O-ring RG made of an elastic material that maintains tight contact with the inner wall of the cylinder S is fitted into an annular groove CG recessed around the outer periphery of the piston head PH, and an intermittent gear of sector gear 1 of the piston P is inserted into the annular groove CG. The intermittent gear of the sector gear 1 extends from the vicinity of the piston head PH of the outer circumferential wall facing downward to the rear end of the piston P, corresponding to the length of the forward and backward movement of the piston P. A rack R that meshes with the portion 3 is carved, and the tip of a piston spring PS made of a compression coil spring is inserted from the rear end opening of the piston P, and the plurality of teeth of the rack R are inserted into the rear end opening of the piston P. One of the teeth R1 disposed closest to the piston head PH is made of reinforced metal, and is integrally and firmly implanted into the peripheral wall of the piston P. The left and right peripheral walls extending from the vicinity of the head PH to the rear end are respectively carved with linear groove-shaped guide rails GR, GR extending in the front-rear direction, so that the piston head PH can freely slide from the rear end opening RP of the cylinder S. The left and right guide rails GR, GR of the piston P are inserted into the regulating protrusions RR, which are provided as direct protrusions extending in the front-rear direction at the corresponding locations of the left and right mechanical boxes MB, MB. , RR so as to be slidable back and forth, thereby preventing the piston P from inadvertently rotating around its circumference.

The trigger unit mounting portion B2 of the mechanical box MB is provided with a trigger unit TU having a trigger TR having a trigger switch TS, and the drive gear mounting portion B3 is provided with an input from a drive motor DM to a bevel gear BG. a sector gear 1 which receives the input from the spur gear SG through the circumferential gear part 2 and transmits the output of the intermittent gear part 3 to the rack R of the piston P, and a cut of the sector gear 1. A cut-off lever CR that engages with the off cams 6, 6 and operates a trigger switch TS according to the safety, semi-automatic, or full automatic position of a selector lever (not shown) is connected from the sector gear 1 to a selector lever (not shown). It is pivotably attached to the mechanical box MB so as to reach the trigger switch TS via the lever, and arranged so that the slipper portion SL at the rear end of the tappet plate TP engages with the tappet cams 5, 5 of the sector gear 1. The trigger TR, the bevel gear BG, the anti-reverse latch PL that engages with the bevel gear BG, the spur gear SG, and the rotating shafts 4 of the sector gear 1 are connected to the left and right mechanical boxes MB, It is rotatably incorporated in a state where it is bridged between each bearing part of the MB.

The cut-off lever CR shown in FIGS. 7 to 11 mechanically links the cut-off cams 6, 6 of the sector gear 1 and the trigger switch TS. The motor has an electronic switch ES that is fixed to the inner wall of the mechanical box MB and is operated by contacting the cut-off cams 6, 6 of the sector gear 1, and that operates the trigger switch TS in conjunction with the electronic switch ES. Replaced with an electrical cutoff mechanism F1 provided with at least one of a mechanical drive mechanism using an electric drive mechanism or an electrical electronic control device (none of which is shown) via an electronic circuit. It can be made into

Further, as shown in FIGS. 14 and 15, the cutoff levers CR are fixed to the inner wall of the mechanical box MB, and are opposed to each other so as to face the rotational trajectory of the cutoff cams 6, 6 of the sector gear 1. A mechanical drive mechanism using an electric mechanism driven by a motor, which has an optical switch (optical sensor: photointerrupter) LS consisting of a light emitting element LE and a light receiving element RE, and operates a trigger switch TS in conjunction with the optical switch LS. Alternatively, the optical cutoff mechanism F2 may be replaced with an optical cutoff mechanism F2 provided with at least one of an electrical and electronic control device (none of which is shown) via an electronic circuit.

Furthermore, as shown in FIGS. 16 and 17, the cut-off lever CR includes a permanent magnet PM embedded in either a recess or a through hole provided on the outer surface of the sector gear 1, and It has an electromagnetic switch MS consisting of a magnetic sensor MC fixed to the inner wall of a mechanical box MB facing the rotational orbit of the PM, and uses an electric mechanism driven by a motor that operates in conjunction with the electromagnetic switch MS and operates a trigger switch TS. The cut-off mechanism F3 may be replaced with an electromagnetic cut-off mechanism F3 provided with at least either a mechanical drive mechanism or an electrical electronic control device via an electronic circuit (none of which is shown). can.

(Actions and effects of Example 2)
In the airsoft gun G of the present invention, when the selector lever (not shown) is operated from the safety position to the semi-automatic position, the shooter moves the trigger TR (in the direction of the solid arrow in FIG. 7) as shown in FIGS. When the trigger switch TS is pulled (as shown), the trigger switch TS is turned ON, the drive motor DM starts rotating, rotates the bevel gear BG and the spur gear SG, and the spur gear SG rotates the full circumference gear part 2 of the sector gear 1. The output tooth band 31 of the intermittent gear portion 3 of the sector gear 1 meshes with the rack R of the piston P, and starts to move the piston P backward against the elastic force of the piston spring PS. As the sector gear 1 moves backward, the tappet cam 5 of the sector gear 1 pulls the slipper part SL of the tappet plate TP backward, and as shown in FIG. is retracted, and during this period, the piston P is further retracted, and before the piston P is completely retracted, the slipper portion SL of the tappet plate TP separates from the tappet cam 5 of the sector gear 1, and the elastic biasing unit EU Tappet plate TP and cylinder nozzle SN, which have received the elastic return force of , move forward and load the next bullet into the chamber (none of which is shown) of the inner barrel.

As shown in FIGS. 1 to 6 and 9, when the output tooth band 31 of the intermittent gear portion 3 of the sector gear 1 comes off the rack R of the piston P and the toothless region band 33 faces the rack R, the rack The backward force of R is released, and the piston P, which is receiving the elastic return force of the piston spring PS, moves forward vigorously, compressing the air in the cylinder S, and through the injection tube part TB and cylinder nozzle SN, the chamber and inner Compressed air is injected toward the barrel (none of which is shown) to fire the bullet in the chamber, and as shown in FIG. 10, the cut-off lever CR placed in the semi-automatic position is aligned with the solid line in FIG. As shown by the arrow, it swings in response to the operating force of the cutoff cam 6 of the sector gear 1, turns off the trigger switch TS of the trigger unit TU, and stops the drive motor DM.

When the selector lever (not shown) is operated to the safety position, the cut-off lever CR placed in the safety position moves to the trigger switch TS of the trigger unit TU, regardless of whether the trigger TR is pulled or not. When the selector lever (not shown) is operated to the full automatic position, the cut-off switch located at the full automatic position will be activated while the trigger TR is pulled. When the lever CR continues to turn on the trigger switch TS of the trigger unit TU and the pull operation of the trigger TR is released, the same cut-off lever CR placed in the full automatic position turns on the trigger switch TS of the trigger unit TU. The switch TS is turned off.

In the case where the cut-off lever CR of the airsoft gun G shown in Figs. 1 to 9 is replaced with the electric cut-off mechanism F1 shown in Figs. 12 and 13, the selector lever (not shown) is in the safety position. If the selector lever or the electrical cutoff is present, regardless of whether the trigger TR is pulled or not, and regardless of whether the electronic switch ES contacts the cutoff cam 6 of the sector gear 1, the selector lever or the electrical cutoff Either one of the mechanisms F1 is controlled to turn off the trigger switch TS.

When the selector lever (not shown) is in the semi-automatic position, when the trigger TR is pulled, the trigger switch TS is turned ON, the drive motor DM is started, the sector gear 1 is rotated, and the piston P is When the electronic switch ES contacts the cut-off cam 6 of the sector gear 1 after firing one shot, the electric cut-off mechanism F1 turns off the trigger switch TS, the drive motor DM is stopped, and the trigger is activated again. When TR is pulled, the trigger switch TS is turned ON, the drive motor DM is started again, the sector gear 1 is rotated, the piston P performs one firing operation, and the cutoff cam of the sector gear 1 is activated. When the electronic switch ES contacts 6, the electrical cutoff mechanism F1 is controlled to turn off the trigger switch TS.

When this selector lever (not shown) is set to the full automatic position, the trigger switch TS is turned ON while the trigger TR continues to be pulled, and the drive motor DM is started to operate the sector gear 1. is rotated, the piston P continuously fires, and when the pull operation of the trigger TR is released, the electric cutoff mechanism F1 detects that the electronic switch ES has contacted the cutoff cam 6 of the sector gear 1. When the trigger switch TS is turned off and the trigger TR is pulled again, the drive motor DM is activated, the sector gear 1 is rotated, and the piston P is continuously rotated while the trigger TR continues to be pulled. When the firing operation is performed and the pulling operation of the trigger TR is released, the electric cut-off mechanism F1 detects that the electronic switch ES has contacted the cut-off cam 6 of the sector gear 1 and turns off the trigger switch TS. controlled.

The cut-off lever CR of the airsoft gun G shown in FIGS. 1 to 9 has a selector lever (not shown) in which the cut-off lever CR is replaced with an optical cut-off mechanism F2 as shown in FIGS. 14 and 15. ) is in the safety position, regardless of whether the trigger TR is pulled or not, the optical switch LS consisting of the light emitting element LE and the light receiving element RE prevents the sector gear 1 from passing through the cutoff cam 6. Regardless of whether it is detected or not, either the selector lever or the optical cutoff mechanism F2 is controlled to turn off the trigger switch TS.

When this selector lever (not shown) is set to the semi-automatic position, when the trigger TR is pulled, the trigger switch TS is turned ON, the drive motor DM is started, the sector gear 1 is rotated, and the piston P fires one shot, and when the optical switch LS detects passage of the cutoff cam 6 of the sector gear 1, the optical cutoff mechanism F2 turns off the trigger switch TS, and the drive motor DM is stopped. When the trigger TR is pulled again, the trigger switch TS is turned ON again, the drive motor DM is activated, the sector gear 1 is rotated, the piston P performs one firing operation, and the optical switch LS When detecting passage of the cutoff cam 6 of the sector gear 1, the optical cutoff mechanism F2 is controlled to turn off the trigger switch TS.

When the selector lever (not shown) is in the full automatic position, the trigger switch TS is turned on while the trigger TR continues to be pulled, the drive motor DM is activated, and the sector gear 1 is rotated. When the piston P continuously fires and the pull operation of the trigger TR is released, the optical switch LS detects passage of the cutoff cam 6 of the sector gear 1, and the optical cutoff mechanism F2 is activated. When the trigger switch TS is turned OFF, the drive motor DM is stopped, and the trigger TR is pulled again, the trigger switch TS is turned ON while the trigger TR continues to be pulled, and the drive motor DM is turned on. When the sector gear 1 is activated, the piston P continuously fires, and the pull operation of the trigger TR is released, the optical switch LS detects the passage of the cut-off cam 6 of the sector gear 1. The optical cutoff mechanism F2 is controlled to turn off the trigger switch TS.

When the cut-off lever CR of the airsoft gun G shown in FIGS. 1 to 9 is replaced with the electromagnetic cut-off mechanism F3 shown in FIGS. 16 and 17, the selector lever (not shown) is in the safety position. If so, regardless of whether the trigger TR is pulled or not, whether or not the magnetic sensor MC of the electromagnetic switch MS consisting of the permanent magnet PM and the magnetic sensor MC detects the passage of the permanent magnet PM of the sector gear 1. Regardless, either the selector lever or the electromagnetic cutoff mechanism F3 is controlled to turn off the trigger switch TS.

When this selector lever (not shown) is set to the semi-automatic position, when the trigger TR is pulled and the trigger switch TS is turned ON, the drive motor DM is started, the sector gear 1 is rotated, and the piston When P fires one shot and the magnetic sensor MC of the electromagnetic switch MS detects the passage of the permanent magnet PM of the sector gear 1, the electromagnetic cut-off mechanism F3 turns off the trigger switch TS and turns off the drive motor. When the DM is stopped and the trigger TR is pulled again, the trigger switch TS is turned ON again, the drive motor DM is activated, the sector gear 1 is rotated, and the piston P performs one firing operation. When the magnetic sensor MC of the electromagnetic switch MS detects the passage of the permanent magnet PM of the sector gear 1, the electromagnetic cutoff mechanism F3 is controlled to turn off the trigger switch TS.

When this selector lever (not shown) is set to the full automatic position, the trigger switch TS is turned ON while the trigger TR continues to be pulled, and the drive motor DM is started to operate the sector gear. 1 is rotated, the piston P continuously fires, and the pull operation of the trigger TR is released, the magnetic sensor MC of the electromagnetic switch MS detects the passage of the permanent magnet PM of the sector gear 1, and the electromagnetic When the target cutoff mechanism F3 turns off the trigger switch TS, the drive motor DM is stopped, and the trigger TR is pulled again, the drive motor DM is started while the trigger TR continues to be pulled. When the sector gear 1 is rotated, the piston P continuously fires, and the pulling operation of the trigger TR is released, the magnetic sensor MC of the electromagnetic switch MS detects the passage of the permanent magnet PM of the sector gear 1, The electromagnetic cutoff mechanism F3 is controlled to turn off the trigger switch TS and stop the drive motor DM.

(Conclusion)
As described above, the sector gear of the present invention and the airsoft gun incorporating it can universally achieve the intended purpose due to its novel configuration, are easy to manufacture, and are compatible with conventional airsoft gun mechanisms. Compared to conventional technology, this technology can significantly increase durability and strength, reduce the number of parts, be lighter, and be much more economical, as well as significantly improve manufacturing workability. Previously, it was necessary to incorporate expensive custom parts or equally expensive parts to further improve the rate of fire performance, but the sector gear of this invention, which is efficiently manufactured, An airsoft gun with this built-in feature has significantly improved rate of fire and durability at a low price, so it is popular not only in the airsoft gun industry and the toy industry, but also for consumers who want to purchase a higher-performance airsoft gun at a more reasonable price. It is expected that this technology will be highly evaluated among the public, and that it will become widely used and popularized.

G airsoft gun
MB same mechanical box
B1 Same cylinder mounting part
B2 Same trigger unit mounting part
B3 Drive gear attachment part
RR Same regulation protrusion S Cylinder
TB Same injection pipe section
SH Same cylinder head
SN Same cylinder nozzle
FG Same fitting groove
AP same air supply port
RP Same rear opening P Piston
R Same rack
R1 Same One tooth placed closest to the piston head PH
PS same piston spring
PH Same piston head
CG same annular groove
RG Same O-ring
GR same guide rail TP tappet plate
SL same slipper part
SP Same slider plate part
NF Same nozzle fitting part
EU Elastic biasing unit 1 Sector gear
α Same direction of rotation of sector gear 1
2. Full circumference gear section
20 Same input tooth
BC same root circle
DA Same Diameter of root circle BC
TG Same tangent to root circle BC
CS Same Range that is distal to the tangent line TG of the root circle BC
PC same pitch circle
DB Same diameter of pitch circle PC
TC Same cutting edge circle
DC Same diameter of cutting edge circle TC
EH Same effective tooth height
TH Same total tooth height
TT same tooth thickness
3 Intermittent gear section
30 Same unit tooth area
31 Same output tooth band
32 Same output tooth
33 Same tooth missing area
4 Rotation axis
4C coaxial center
5 Same tappet cam
β Same angle range of tappet cam 5
6 Same cutoff cam TR trigger
TU same trigger unit
TS Same trigger switch CR Cutoff lever F1 Electrical cutoff mechanism
ES Same electronic switch F2 Optical cut-off mechanism
LS same optical switch
LE same light emitting element
RE Same light receiving element F3 Electromagnetic cut-off mechanism
MS same electromagnetic switch
PM Permanent magnet
MC Same magnetic sensor SG Spur gear DM Drive motor BG Bevel gear PL Anti-reverse latch C1 Conventional sector gear C2 Conventional full circumference gear section C3 Conventional intermittent gear section
HS same hexagon socket head bolt

Claims (4)

It has a mechanical box with a cylinder mounting part at the top, a trigger unit mounting part at the front lower part of the cylinder mounting part, and a drive gear mounting part at the rear lower part of the cylinder mounting part. The front cylinder head is provided with a cylinder in which a cylinder nozzle is arranged, and a tappet plate is provided which extends from the base end of the cylinder nozzle to the drive gear attachment part and is movable back and forth integrally with the cylinder nozzle. A piston, which is provided with a rack on the outer circumferential wall near the rear end, is inserted into the rear end opening of the cylinder so as to be able to move forward and backward, and the piston is provided with a piston spring that biases the trigger forward. A trigger having a trigger switch is disposed on the unit mounting part, and the drive gear mounting part includes a spur gear that receives input from the drive motor, a peripheral gear part that receives input from the spur gear, and an intermittent gear part that receives input from the spur gear. A sector gear that transmits the output to the rack of the piston, and an electric motor that engages with the cut-off cam of the sector gear and operates a trigger switch depending on the safety, semi-automatic, or full automatic position of the selector lever. A cut-off mechanism, an optical cut-off mechanism, or an electromagnetic cut-off mechanism is provided, and the slipper portion at the rear end of the tappet plate is arranged to engage the tappet cam of the sector gear,
The sector gear is provided with a circumferential gear portion in which input teeth are arranged over the entire circumference, and the tooth root circle, pitch circle, and cutting edge of the circumferential gear portion are arranged on one side of the circumferential gear portion. One output tooth band in which a circle, effective tooth height, total tooth height, and tooth thickness are set to be the same, and a plurality of output teeth are arranged around the axis of the full circumference gear portion, and the one output tooth band At least one unit tooth area is arranged around the axis, and the unit tooth area consists of one toothless area zone in which no output tooth is arranged in the range from the tangent of the root circle to the distal edge. In addition to the gear portion being integrally provided, the full circumference gear portion and the intermittent gear portion are made of one metal block,
The electrical cut-off mechanism includes an electronic switch that is operated by contacting the cut-off cam of the sector gear, and a mechanical drive mechanism that operates in conjunction with the electronic switch to operate a trigger switch, or an electrical and electronic drive mechanism that operates in conjunction with the electronic switch. At least one of the control devices is provided,
The optical cutoff mechanism has an optical switch consisting of a light emitting element and a light receiving element facing each other in a pair facing the rotational trajectory of the cutoff cam of the sector gear. At least one of a mechanical drive mechanism or an electrical electronic control device is provided to operate the
The electromagnetic cutoff mechanism includes a permanent magnet embedded in a recess provided on the outer surface of the sector gear, and a magnetic sensor fixed to the inner wall of the mechanical box facing the rotation orbit of the permanent magnet. An airsoft gun characterized by having an electromagnetic switch and being provided with at least one of a mechanical drive mechanism or an electrical electronic control device that operates in conjunction with the electromagnetic switch to operate a trigger switch.
The unit tooth area of the sector gear is integrally provided with a plurality of intermittent gear parts arranged at equal angles around the axis, and corresponds to the axis of the full circumference gear part and the intermittent gear part. 2. The airsoft gun according to claim 1, wherein concentric rotating shafts are integrally protruded from each outer wall, and the circumferential gear part, the intermittent gear part, and the rotating shaft are made of a single metal block.
The unit tooth areas in the sector gear are provided at a total of three locations every 120° around the axis, or the unit tooth areas are arranged alternately at every 90° around the axis. The airsoft gun according to claim 1 or 2, wherein the airsoft gun is
The sector gear according to claim 1 or 2, wherein the full circumference gear portion and the intermittent gear portion have the same root circle, pitch circle, cutting edge circle, effective tooth height, total tooth height, and tooth thickness. Airsoft gun listed.

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