Gearbox device and air gun

Abstract

The present invention aims to improve the performance of motor-operated air guns, reduce vibration and noise, and improve the user experience and convenience. [Solution] A gearbox device to be installed in an air gun, comprising: a motor; a reduction unit that reduces the rotational speed of the motor and transmits the power of the motor to a bullet launcher that fires bullets; a housing that houses the motor and the reduction unit; and a control board for controlling the motor, the control board being attached to at least one surface of the housing.

Description

[Technical field]

[0001] The present invention relates to a gearbox device and an air gun as a toy gun to which the gearbox device is attached. [Background technology]

[0002] In a toy gun, the air in a cylinder is compressed by a piston to fire a bullet. A commonly known toy gun is one in which the piston is driven by power transmitted from an electric motor.

[0003] (First issue) For example, as shown in Fig. 44 of Patent Document 1, some conventional air guns have a motor located in the grip. The power of the motor located in the grip is transmitted via a reduction mechanism to a piston located outside the grip, which drives the piston.

[0004] However, with the premise that the motor is built into the grip in this manner, when a user wants to change the grip to suit their preference, they are limited to grips with a motor, significantly reducing the user's freedom of movement. In addition, since the grip mounting angle is fixed, the grip mounting angle cannot be changed according to the user's preference. Furthermore, when the motor rotates, a counter torque is generated around the axis of the motor's rotation shaft built into the grip, which can cause the gun to swing left and right or create an uncomfortable feeling in the hand holding the grip, potentially compromising the performance of the air gun or the user's experience.

[0005] In another conventional air gun, as shown in FIG. 1 of Patent Document 2, the motor is not built into the grip, but is arranged adjacent to the gear set.

[0006] However, in the motor of Patent Document 2, the motor's rotation axis is positioned parallel to the longitudinal direction of the barrel. As a result, when the motor rotates, a counter torque is generated in the rolling direction around the longitudinal direction of the barrel. As with Patent Document 1, this can cause the gun to swing from side to side or create an uncomfortable feeling in the hand holding the grip, potentially impairing the performance of the air gun or impairing the user's experience of use.

[0007] (Second issue) In both Patent Documents 1 and 2, the motor rotation shaft and the rotation shaft of the gear in the reduction section that drives the piston are perpendicular to each other, so the orientation of the rotation shaft needs to be changed at some stage in the reduction section. For example, by adopting a transmission mechanism such as a bevel gear on the input side of the reduction section, the rotation is transmitted between two perpendicular shafts.

[0008] However, when such a transmission mechanism is adopted, if play occurs in the thrust direction of the motor due to long-term use of the gun or deterioration over time, the play can significantly reduce the transmission efficiency and cause increased vibration, noise, and wear.

[0009] (Third issue) Also, there is a gear box device that can be completely separated from the air gun body, as in Patent Document 1. If the gear box device can be completely separated from the air gun body, the mechanism of the reduction gear can be easily replaced or repaired.

[0010] However, because the motor and gearbox are separate, the gearbox device needs to be detached from the motor when it is separated from the air gun body. When the gearbox device is reassembled into the air gun, it takes time to adjust the meshing between the motor and the gears in the reduction section, and precise adjustments are required to ensure that the backlash is appropriate when the two are meshed together, so it is not necessarily convenient. [Prior art documents] [Patent documents]

[0011] [Patent Document 1] JP2006-170473A [Patent Document 2] JP2001-033196A Summary of the Invention [Problem to be solved by the invention]

[0012] An object of the present invention is to improve the performance and usability of air guns that use motors. Another object is to reduce vibration, noise, and wear of the air gun. Another object is to improve the ease of maintenance of air guns. [Means for solving the problem]

[0013] The first invention of the present disclosure is a gear box device provided in an air gun, A motor; a speed reducer that reduces the rotation speed of the motor and transmits the power of the motor to a bullet launcher that launches a bullet; a housing portion including a member for housing the motor and the reduction gear; A control board for controlling the motor, The control board is attached to at least one surface of the housing portion. 、 The reduction gear portion has a drive gear that engages with a rack gear of the bullet launching portion, and a part of the outer periphery of the drive gear is provided so as to protrude from the accommodating portion. Where: An "air gun" is any device that fires bullets using the compressed force of air or other gas, and the name can be any name, such as airsoft gun or air rifle. "Motor" includes motors that use the force generated by the interaction between a magnetic field and an electric current (Lorentz force) to output rotational motion, ultrasonic motors that use ultrasonic vibrations, and electrostatic motors that use electrostatic force. Furthermore, air motors and hydraulic motors can also be used. A "bullet" refers to an object that is fired from a gun barrel, and may be spherical like a BB bullet, or may be shaped like a live bullet consisting of a warhead and a cartridge case. The bullet may be made of plastic, or of other materials such as plaster or clay. The "housing" may be any structure having a space for housing parts such as gears that constitute a motor or a reducer, and does not necessarily have to be a sealed structure, and some of the housed parts may be exposed or protrude. Furthermore, the material may be any material, such as metal, fiberboard, plastic, etc. The term "one surface" includes either the inner surface or the outer surface of the housing. In addition, the surface on which the control board is provided may be missing all or a part of the members constituting the housing.

[0014] A second aspect of the present disclosure provides a gearbox device according to the first aspect of the present disclosure, The control board is provided so as to be in contact with the housing portion.

[0015] The third invention of the present disclosure is The second invention In the gear box device of the motor is a brushless motor, The motor The back of It is provided so as to be in contact with the storage portion.

[0017] The present disclosure The fourth invention teeth, The third invention In the gear box device of The housing has thermal conductivity and functions as a heat sink.

[0018] The present disclosure The fifth invention In the gear box device of the first invention, The gearbox device is detachable from the air gun.

[0019] The present disclosure The sixth invention In the gear box device of the first invention, The motor is arranged so that its rotation axis, which is the rotation shaft of the motor, is perpendicular to the longitudinal direction of the barrel of the air gun, and so that when the gearbox is attached to the air gun, the motor rotation axis is perpendicular to the vertical direction. Where: "Perpendicular" refers to the relationship in which two straight lines intersect at a right angle when either of them is moved in parallel, but the two straight lines may be in a twisted relationship. Also, it does not have to be exactly 90 degrees, and there may be some margin of error or play. "Perpendicular to the longitudinal direction of the barrel" means perpendicular to the axis of the cylindrical space inside the barrel, and is not dependent on the shape or irregularities of the exterior of the barrel.

[0020] The present disclosure The seventh invention teeth, The sixth invention In the gear box device of The reduction gear unit has a gear. The motor rotation axis is parallel to the gear rotation axis. Where: The term "gear" includes not only gears with teeth, but also rollers, cams, and pulleys that do not have teeth.

[0021] The present disclosure The eighth invention teeth, The seventh invention In the gear box device of The reduction gear unit has a plurality of gears, The rotation axes of the gears are parallel to one another.

[0022] The present disclosure The ninth invention In the gear box device of the first invention, The motor rotates in a direction such that the counter torque generated by the rotation of the motor acts in a direction pushing up the tip of the gun barrel.

[0023] The present disclosure The 10th invention In the gear box device of the first invention, The motor rotates gradually faster at the beginning and gradually slower at the end.

[0024] An eleventh aspect of the present disclosure is an air gun, A bullet launching unit that launches a bullet; A motor; a speed reducer that reduces the rotation speed of the motor and transmits the power of the motor to the bullet launcher; a housing portion including a member for housing the motor and the reduction gear; A control board for controlling the motor; a barrel through which the bullet fired from the bullet firing section passes; a grip for a user to grasp; The control board is attached to at least one surface of the housing portion. 、 The reduction gear portion has a drive gear that engages with a rack gear of the bullet launching portion, and a part of the outer periphery of the drive gear is provided so as to protrude from the accommodating portion.

[0025] The present disclosure 12th invention teeth, Inventions 2 to 10 It is an air gun equipped with a gearbox device. Effect of the Invention

[0026] By providing an air gun with the gear box device of the present invention, the performance and usability of the air gun can be improved, or vibration, noise, and wear of the air gun can be reduced, or the maintainability of the air gun can be improved.

[0027] The air gun of the present invention can improve the performance and usability of the air gun, reduce vibration, noise, and wear of the air gun, and improve the maintainability of the air gun. [Brief description of the drawings]

[0028] [Figure 1] A conceptual diagram showing the internal structure of the main part of the air gun according to the embodiment of the present invention. [Diagram 2] FIG. 1 is a front view of a gearbox device according to an embodiment of the present invention. [Diagram 3] FIG. 1 is a side view of a gearbox device according to an embodiment of the present invention. [Figure 4] FIG. 1 is a diagram showing a gearbox device according to an embodiment of the present invention, viewed obliquely from above. [Diagram 5]FIG. 1 is a rear view of a gearbox device according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0030] The present invention means the invention described in the claims or in the Summary of the Invention section, and is not limited to the following embodiments. Furthermore, at least the words in quotation marks mean the words described in the claims or in the Summary of the Invention section, and are not limited to the following embodiments.

[0031] The configurations and methods described in the dependent claims are optional configurations and methods in the invention described in the independent claims. The configurations and methods of the embodiments corresponding to the configurations and methods described in the dependent claims, and the configurations and methods described only in the embodiments without being described in the claims, are optional configurations and methods in the present invention. The configurations and methods described in the embodiments when the description of the claims is broader than the description of the embodiments are also optional configurations and methods in the present invention in the sense that they are examples of the configurations and methods of the present invention. In either case, by being described in the independent claims, they become essential configurations and methods of the present invention.

[0032] The effects described in the embodiments are effects obtained when the configurations of the embodiments are provided as examples of the present invention, and are not necessarily effects that the present invention possesses.

[0033] When there are multiple embodiments, the configurations disclosed in each embodiment are not limited to each embodiment, but can be combined across the embodiments. For example, a configuration disclosed in one embodiment may be combined with another embodiment. Also, configurations disclosed in each of the multiple embodiments may be collected and combined.

[0034] The problem described in the section on problems that the invention is intended to solve is not a publicly known problem, but was discovered independently by the inventor, and this, together with the configuration and method of the present invention, is a fact that affirms the inventive step of the invention.

[0035] (1) Overall configuration of the air gun according to the present embodiment The configuration of the air gun 1 of this embodiment will be described. 1 shows the internal structure of the main parts of an air gun 1, which is a toy gun modeled after an assault rifle. The air gun 1 has a barrel 11, a foregrip 12, an upper receiver 13, a lower receiver 14, a grip 15, and a magazine 16.

[0036] The gun barrel 11 has a long and thin cylindrical shape, through which a bullet fired from a bullet firing unit 20 (described later) passes to guide the bullet to the muzzle. The gun barrel 11 is also called a barrel or a gun barrel.

[0037] The foregrip 12 is a member that encases the barrel. A user supports the air gun 1 by gripping the foregrip 12 with one hand. In an actual rifle, the foregrip 12 also serves to protect the hand from the heat of the barrel. The foregrip 12 is also called a forehand or handguard.

[0038] The upper receiver 13 is a frame that houses a bullet launching section 20, which will be described later. The lower receiver 14 is a frame that houses a gear box device 100, which will be described later. The upper receiver 13 and the lower receiver 14 are engaged with each other by any engaging means such as a fixing pin, and can be separated by removing the fixing pin.

[0039] The grip 15 is provided for holding the air gun with the hand opposite to that for gripping the foregrip 12 and for pulling the trigger.

[0040] The magazine 16 is a magazine that stores a plurality of bullets and supplies the bullets to a loading section L of the bullet firing section 20.

[0041] The gearbox device 100 is made up of a motor 101, a reduction gear unit 102, and a housing unit 103 that houses the motor 101 and the reduction gear unit 102, and is a device that transmits the power of the motor 101 to the bullet launching unit 20. The details of the gearbox device 100 will be described later with reference to Figures 2 to 5.

[0042] The bullet firing section 20 includes a piston 21, a cylinder 22, and a compression spring 23, and uses the power of the gear box device 100 to fire a bullet.

[0043] The piston 21 has a rack gear 24 that receives power from the gear box device 100. Specifically, the rack gear 24 meshes with a drive gear 102d of a speed reducer 102 described later, and converts the rotational motion of the drive gear 102d into the translational motion of the piston 21.

[0044] In this embodiment, the air gun 1 has the gear box device 100. However, instead of this, the motor 101 and the reduction gear unit 102 may be provided directly in the lower receiver 14.

[0045] (2) Gearbox device of this embodiment A gearbox device 100 according to an embodiment of the present invention will be described with reference to Figs. 2 to 5.

[0046] As shown in FIGS. 2 to 5, the gearbox device 100 includes a motor 101, a reduction unit 102, a housing unit 103, and a control board 104.

[0047] A.Motor 101 The motor 101 converts electrical energy supplied from a battery (not shown) into mechanical energy, thereby generating power in the form of rotational motion.

[0048] Although there is no limitation on the type of motor 101, it is particularly preferable to use a brushless motor. A brushless motor rotates a rotor made of a magnet by a magnetic field created by a current flowing through a coil of a stator, and controls the rotation by changing the current value using a drive circuit (motor driver) made of power elements such as transistors provided on a control board 104.

[0049] In this way, the brushless motor rotates a magnet that does not require a power supply, rather than a coil, so by making the rotating rotor smaller, it is possible to achieve a thinner, smaller, and lighter device. As a result, it can be compactly housed in the housing 103 together with the reduction gear unit 102, and the gear box device 100 itself can be made smaller. Furthermore, as described below, it becomes easy to set the rotation axis of the motor 101 perpendicular to the longitudinal direction of the barrel of the air gun 1. Furthermore, brushless motors do not require brushes and commutators, which are consumable parts as in brushed motors, and therefore have a long life and are highly reliable. Furthermore, in a brushless motor, the current flowing through the stator coil is controlled by a control board such as a motor driver, making it possible to set various operations such as rotation / stop and power change.

[0050] In this embodiment, the motor 101 is installed so that the rotation axis of the motor 101 is perpendicular to the longitudinal direction of the barrel 11 of the air gun 1. That is, in Fig. 1, the rotation axis MA of the motor 101 constituting the gearbox device 100 is perpendicular to the center line F of the barrel. In this case, the rotation axis MA is also perpendicular to the vertical direction. Moreover, the rotation axis MA is parallel to the horizontal plane (ground surface).

[0051] In this way, by arranging the rotation axis MA of the motor 101 so that it is perpendicular to the longitudinal direction of the barrel 11, a counter torque is generated in the rotation direction about the rotation axis MA. The counter torque in this direction can be easily absorbed by the user grasping the grip 15 and the foregrip 12. The arrangement of the motor 101 as in this embodiment does not cause any shaking in the left-right direction caused by the counter torque in the rotation direction about the long axis of the grip 15 or the rotation direction about the long axis of the barrel 11 as in the conventional case.

[0052] 1, the gearbox device 100 including the motor 101 is disposed so that its position in the longitudinal direction of the barrel 11 is between the grip 15 behind the trigger of the air gun 1 and the foregrip 12. As a result, the sum of the torques due to the reaction forces received from the hands gripping the grip 15 and the foregrip 12 is in the opposite direction to the counter torque generated in the air gun 1 by the rotation of the motor 101, so that the counter torque of the motor 101 can be easily absorbed by the user gripping the grip 15 and the foregrip 12. In the case of an air gun 1 that does not have a foregrip 12, the gearbox device 100 may be located between the grip 15 and the barrel 11.

[0053] In this embodiment, the rotation direction of the motor 101 is arbitrary, but it may be rotated in a direction such that the counter torque generated by the rotation of the motor 101 acts in a direction pushing up the tip of the gun barrel 11. In the case of Figures 1 and 2, the rotation axis MA rotates to the right (clockwise) when facing the paper surface of Figures 1 and 2. By having the counter torque act in this direction, it is possible to reproduce the same sensation as with a real gun.

[0054] Conversely, the motor 101 may be rotated in a direction such that the counter torque generated by the rotation of the motor 101 acts in a direction that pushes down the tip of the gun barrel 11. In the case of Figures 1 and 2, the rotation axis MA rotates left (counterclockwise) when facing the paper surface of Figures 1 and 2. In this case, the rotation direction of the drive gear 102d is reversed and it will no longer mesh with the rack gear 24, so it is necessary to either omit the intermediate gear 102b or add another intermediate gear in addition to the intermediate gear 102b.

[0055] The orientation can be determined based on user preference.

[0056] Also, the rotation speed of the motor 101 may be controlled so that it is slow at the start of rotation, gradually increases to a constant speed, and gradually decreases toward the end of rotation, finally stopping. The speed gradient may be linear or exponential. By performing such control, it is possible to prevent damage to the gears constituting the speed reducer 102 and to suppress the generation of counter torque.

[0057] A. Speed ​​reducer 102 The power of the motor 101 is input to the speed reducer 102. The speed reducer 102 reduces the rotation speed of the motor 101 and transmits the power of the motor 101 to the bullet launcher 20.

[0058] In this embodiment, the reduction gear unit 102 includes an input gear 102a, an intermediate gear 102b, an output gear 102c, and a drive gear 102d.

[0059] The rotation shaft of the input gear 102 a is connected to the motor 101 so as to be coaxial with the motor shaft MA, and is directly driven to rotate by the motor 101 . The intermediate gear 102b is composed of a large diameter gear and a small diameter gear, and the rotation speed of the intermediate gear 102b is reduced by a reduction ratio determined by the gear ratio between the large diameter gear and the input gear 102a. The output gear 102c is also composed of a large diameter gear and a small diameter gear, and the rotation speed of the intermediate gear 102b is reduced by a reduction ratio determined by the gear ratio between the large diameter gear of the output gear 102c and the small diameter gear of the intermediate gear 102b.

[0060] Therefore, in the reduction section 102, the rotation speed of the motor 101 can be significantly reduced by reducing the speed between the input gear 102a and the intermediate gear 102b and between the intermediate gear 102b and the output gear 102c, while maintaining a compact configuration.

[0061] The drive gear 102d is connected to the output gear 102c via a planetary gear and rotates in the opposite direction to the output gear 102c. The drive gear 102d meshes with the rack gear 24 of the piston 21, and the counterclockwise rotational motion of the drive gear 102d in Figures 1 and 2 is converted into linear motion that moves the piston 21 to the left. In addition, because the planetary gear is used, the output is further reduced in speed from the output of the output gear 102c.

[0062] 3 is a side view of the gearbox device of FIG. 2 as viewed from a direction A, and FIG. 4 is a perspective view of the gearbox device of FIG. 3 as viewed from a direction B. As shown in FIG. As shown in FIGS. 3 and 4, the driving gear 102d has, on its outer periphery, a toothed portion T having gear teeth and a toothless portion N having no teeth.

[0063] When the toothed portion T of the drive gear 102d and the rack gear 24 of the piston 21 face each other, the toothed portion T and the rack gear 24 of the piston 21 mesh with each other, and the output torque of the reduction gear unit 102 is transmitted as a driving force to the rack gear 24 of the piston 21 via the toothed portion T of the drive gear 102d.

[0064] On the other hand, when the drive gear 102d rotates and the toothless portion N faces the rack gear 24, the piston 21 is released from the constraint of the drive gear 102d, and the output torque of the reduction gear portion 102 is not transmitted to the rack gear 24. As a result, the piston 21 moves to the right due to the compressive force of the compression spring 23.

[0065] In this manner, the drive gear 102d has a toothed portion T and a toothless portion N, so that the piston 21 can move in the left-right direction as desired.

[0066] 2, the rotation axis MA of the motor 101 and the rotation axes of the input gear 102a, the intermediate gear 102b, and the output gear 102c are parallel to one another and perpendicular to the plane of Fig. 2. Therefore, the rotation axes of all the gears of the reduction gear unit 102 are parallel to the rotation axis MA of the motor 101.

[0067] In particular, since the rotation axis MA of the motor 101 and the rotation axis of the input gear 102a are parallel, there is no need to use a transmission mechanism for transmitting rotation between two non-parallel shafts, such as the meshing of bevel gears, as in the past. In other words, a spur gear can be used as the gear of the input gear 102a that meshes with the motor 101. If the gear is a spur gear, even if rattle occurs in the thrust direction of the motor due to long-term use of the gun or deterioration over time, the thrust force is not transmitted and the rattle in the thrust direction can be absorbed. Therefore, unlike the conventional technology that used a bevel gear, the transmission efficiency of the reduction unit 102 does not deteriorate, and vibration, noise, and wear can be reduced.

[0068] In addition, since the rotation axes of the multiple gears constituting the reduction gear unit 102 are all parallel to one another, it is possible to cancel out all or part of the counter torque generated by each gear.

[0069] In addition, in the speed reducer 102, in addition to using transmission via gears, sliding contact transmission using a cam or the like, rolling contact transmission using a friction wheel or the like, or transmission using a belt and pulley may also be used.

[0070] C. Storage section 103 The housing portion 103 houses the motor 101 and the reduction gear portion 102 .

[0071] By accommodating the motor 101 and the reduction gear unit 102 in the accommodation unit 103, both the motor 101 and the reduction gear unit 102 can be provided within the gear box device 100. In other words, the entire power transmission system to the bullet launching unit 20 can be provided within the gear box device 100.

[0072] Therefore, there is no need to provide a separate space for housing the motor 101 in another portion. For example, since there is no need for the grip 15 to have a special structure with a space for accommodating the motor 101, the shape, design, angle, and weight of the grip 15 can be freely changed according to the user's preference. Alternatively, the grip 15 can be a grip of a real gun.

[0073] In this embodiment, the motor 101 and the housing portion 103 are arranged so as to be in contact with each other. Specifically, the back surface of the motor 101 is arranged so as to be in contact with the housing portion 103. If the housing portion 103 is made of a material with high thermal conductivity, such as an aluminum alloy or a zinc alloy, the housing portion 103 functions as a heat sink and can prevent the motor 101 from overheating. The heat of the housing portion 103 can be released to the outside via the lower receiver 14. This configuration is particularly suitable when a brushless motor is used as motor 101. In a brushless motor, the stator coil is provided in contact with the back surface of the motor, so that heat can be efficiently discharged through housing portion 103.

[0074] The material constituting the housing portion 103 can be selected from any material such as plastic, metal, etc. When it is made of metal, it can be manufactured by casting such as die casting, or by forging.

[0075] The gearbox device 100 may be detachable from the air gun 1. In the present embodiment, since the gearbox device 100 has a housing portion 103, the gearbox device 100 is configured as an independent device and can be easily detached.

[0076] For example, when removing the gearbox apparatus 100 from the air gun 1, the upper receiver 13 and the lower receiver 14 are separated, and the gearbox apparatus 100 is pulled out from the lower receiver 14.

[0077] For example, when mounting the gearbox device 100 to the air gun 1, the gearbox device 100 is fitted into the space provided in the lower receiver 14. At this time, since a motor is not provided in the grip 15 as in the conventional case, there is no need to adjust the position of the gearbox device 100. Then, the upper receiver 13 and the lower receiver 14 are joined together.

[0078] In this way, by making the gearbox device 100 detachable from the air gun 1, the gearbox device 100 can be easily replaced or repaired. Furthermore, since the gear box device 100 equipped with the motor 101 and the reduction gear unit 102 can be attached and detached as a single unit, when attaching the gear box device 100 to an air gun, the task of meshing the motor with the gears of the reduction gear unit is not required, and the gear box device 100 can be easily attached.

[0079] Furthermore, it is also possible to replace the gearbox device of a conventional air gun with the gearbox device 100. By mounting the gearbox device 100 in the space of the gearbox device of the conventional air gun and connecting an electric wire that supplies power from a battery, it becomes possible to use the conventional air gun without using the motor that is originally equipped in the conventional air gun.

[0080] D. Control board 104 The gearbox device 100 has a control board 104 for controlling the motor 101. The control board 104 is attached to at least one surface of the housing portion 103. In this embodiment, the control board 104 is attached to the rear surface of the housing portion 103 as shown in FIG.

[0081] Since the motor 101 is housed in the housing 103, the control board 104 can also be mounted on the back side of the housing 103 close to the motor 101, thereby shortening signal lines, power lines, etc., and improving reliability. In addition, the entire power transmission system that transmits power to the bullet launcher 20, including the control board 104, can be compactly integrated into the gearbox device 100. Furthermore, by consolidating the gearbox device 100, including the control board 104, into a compact configuration, it is possible to secure more space for the battery, thereby extending the operating time of the air gun. Specifically, the control board 104 and the battery were conventionally provided inside a back tube provided at the rear of the upper receiver 13, but by providing the control board 104 integrally with the gearbox device 100, it is possible to use the entire space inside the back tube as space for the battery.

[0082] In this embodiment, the control board 104 and the housing portion 103 are provided so as to be in contact with each other. If the housing portion 103 is made of a material with high thermal conductivity, such as an aluminum alloy or a zinc alloy, the housing portion 103 functions as a heat sink and can dissipate heat generated from the control board 104. With this configuration, it is possible to prevent malfunctions due to overheating of the control board 104.

[0083] The control board 104 may be attached to the front, side, or bottom surface of the storage unit 103 instead of the back surface of the storage unit 103. Also, the control board 104 may be attached to both the back surface and side surface of the storage unit 103, or to straddle both the back surface and bottom surface of the storage unit 103.

[0084] The method of controlling the motor 101 by the control board 104 can be changed by the user through a user interface (not shown). The user can independently change the delay time from the trigger instruction, the rotation torque or rotation speed, the rotation profile, and the like.

[0085] E. Understanding the features described in the embodiments as inventions The features described in the above embodiments can each be understood as an independent invention. For example, from the viewpoint of configuration, the axial direction of the motor 101, the rotation control of the motor 101, the axial direction of the gears constituting the reduction gear unit 102, the configuration of the housing unit 103, and the relationship between the housing unit 103 and other components can be understood as independent inventions. Also, from the viewpoint of function, counter-torque measures, noise, vibration, or wear measures, heat measures, compatibility measures, and hobby measures can be understood as independent inventions.

[0086] (3) Operation of the air gun according to this embodiment The operation of the air gun 1 of this embodiment up to firing a bullet will be described.

[0087] When a trigger (not shown) is pulled by a user, a firing command signal is sent to the control board 104. The control board 104 receives the firing command signal and controls the motor 101 to rotate it.

[0088] The power of the motor 101 is transmitted to the piston 21 via the reduction gear unit 102 . Specifically, when the toothed portion T of the drive gear 102d meshes with the rack gear 24, the piston 21 moves leftward in FIG. As the piston 21 moves, the compression spring 23 is compressed.

[0089] Meanwhile, the bullets stored in the magazine 17 are loaded into the loading section L at the base of the barrel 11 by the negative pressure of the cylinder 22.

[0090] When the drive gear 102d further rotates and the toothless portion N faces the rack gear 24, the constraint of the rack gear 24 is released and the piston 21 receives the spring force of the compression spring 23, so that the piston 21 moves rightward in FIG.

[0091] The rightward movement of piston 21 compresses the air in cylinder 22, creating pressure that fires a bullet.

[0092] The bullet is subjected to this pressure, accelerates as it moves through the gun barrel 11, and is fired from the muzzle 11.

[0093] (4) Summary The features of the gearbox device and the air gun according to the embodiment of the present invention have been described above. The terms used in each embodiment are merely examples and may be replaced with terms having the same meaning or functions.

[0094] The gearbox device of the present invention may be provided with additional functions as required, such as a communication device for a control interface.

[0095] The air gun of the present invention may be equipped with necessary functions such as a sight, a safety device, a sling, etc. [Industrial Applicability]

[0096] The gearbox device of the present invention and the air gun equipped with the gearbox device have been described as being applicable to toy guns, but they can also be used as guns for shooting competitions, guns for various training purposes, and model guns. [Explanation of symbols]

[0097] 1 air gun, 11 gun barrel, 12 foregrip, 13 upper receiver, 14 lower receiver, 15 grip, 16 magazine, 20 bullet launching section, 21 piston, 22 cylinder, 23 compression spring, 24 rack gear, 100 gearbox device, 101 motor, 102 reduction section, 102a input gear, 102b intermediate gear, 102c output gear, 102d drive gear, 103 storage section, 104 control board

Claims

1. A gear box device for an air gun, A motor; a speed reducer that reduces the rotation speed of the motor and transmits the power of the motor to a bullet launcher that launches a bullet; a housing portion including a member for housing the motor and the reduction gear; A control board for controlling the motor, The control board is attached to at least one surface of the housing portion, The reduction gear has a drive gear that engages with the rack gear of the bullet launcher, and a part of the outer periphery of the drive gear is provided so as to protrude from the storage portion. Gearbox device.

2. The control board is provided so as to be in contact with the housing portion. The gearbox arrangement of claim 1.

3. The motor is a brushless motor, and a back surface of the motor is provided in contact with the housing portion. The gearbox arrangement according to claim 2.

4. The housing has thermal conductivity to function as a heat sink.

4. The gearbox arrangement according to claim 3.

5. The gearbox device is detachable from the air gun. The gearbox arrangement of claim 1.

6. The motor is provided such that a motor rotation shaft, which is a rotation shaft of the motor, is perpendicular to the longitudinal direction of the barrel of the air gun, and the motor rotation shaft is perpendicular to the vertical direction when the gear box is attached to the air gun. The gearbox arrangement of claim 1.

7. The reduction gear unit has a gear. The motor rotation axis is parallel to the gear rotation axis. A gearbox arrangement according to claim 6.

8. The reduction gear unit has a plurality of gears, The rotation axes of the gears are parallel to each other. A gearbox arrangement according to claim 7.

9. The motor rotates in a direction such that a counter torque generated by the rotation of the motor acts in a direction to push up the tip of the barrel of the air gun. The gearbox arrangement of claim 1.

10. The motor rotates gradually faster at the beginning of rotation and gradually slower at the end of rotation. The gearbox arrangement of claim 1.

11. A bullet launching unit that launches a bullet; A motor; a speed reducer that reduces the rotation speed of the motor and transmits the power of the motor to the bullet launcher; a housing portion including a member for housing the motor and the reduction gear; A control board for controlling the motor; a barrel through which the bullet fired from the bullet firing section passes; a grip for a user to grasp; The control board is attached to at least one surface of the housing portion, The reduction gear has a drive gear that engages with the rack gear of the bullet launcher, and a part of the outer periphery of the drive gear is provided so as to protrude from the storage portion. air gun.

12. A gearbox device according to any one of claims 2 to 10, air gun.

Images