Rifle and its positioning mechanism

Abstract

To provide a rifle, a pistol, and their position adjustment mechanisms, which enable stable aiming and trigger pulling with a simple configuration.SOLUTION: In a rifle 1 having an adjustment member for adjusting the position and orientation of the rifle 1 relative to the human body when the rifle 1 is held, at least one of a gunstock 7 (cheek rest), a shoulder rest 8 (shoulder rest), and a fore-end 9 can be adjusted with five degrees of freedom or less, six degrees of freedom, or seven degrees of freedom or more.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to rifles, pistols, and their position adjustment mechanisms.

Background Art

[0002] Rifle stabilization systems against hand tremors and the like have been conventionally proposed. A control system for rifle stabilization based on fuzzy logic, which uses a rifle in which the barrel is freely rotatable on the stock.

[0003] The stock is held by the person firing the rifle, and the shooter may fire from a moving vehicle or helicopter. Also, the shooter may cause hand tremors or accidentally sway the body.

[0004] In the tracking mode, when a target is in sight, unwanted movements are detected by a position sensor, and the barrel of the rifle is locked so as to be aligned with the stock.

[0005] In the stabilization mode, immediately before pulling the trigger to fire the rifle, the lock of the barrel is released, and an inertial rate sensor makes the barrel relatively immune to the movement of the stock, so that the barrel continues to be seen tracking the target.

[0006] The firing control system includes fuzzy logic control means, which aligns the barrel with the stock during tracking and stabilizes the barrel immediately before firing by a group of inference rules. (Patent Document 1)

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

[0008] The technology described in Patent Document 1 involves a complex system for rifle stabilization. Such a complex system is prone to failure and makes manufacturing difficult.

[0009] Therefore, the object of the present invention is to provide rifles, pistols, and their position adjustment mechanisms that enable stable aiming and trigger pulling with a simple configuration. [Means for solving the problem]

[0010] To achieve the above objective, the present invention provides a rifle having an adjustment member for adjusting the position and orientation of the rifle and the human body when the rifle is held, wherein the adjustment member comprises at least one of the stock (cheek rest), shoulder rest (shoulder rest), and forend, each re6 It is possible to adjust the degrees of freedom, or more than 7 degrees of freedom.

[0011] Here, the adjustment member may be located on the trigger and at least one or both of the grip.

[0012] To achieve the above objective, the rifle position adjustment mechanism of the present invention, which has an adjustment member for adjusting the position and orientation of the rifle and the human body when the rifle is held, comprises an adjustment member which comprises at least one of the stock (cheek rest), shoulder rest (shoulder rest), and forend. re6 It is possible to adjust the degrees of freedom, or more than 7 degrees of freedom.

[0013] Here, the adjustment member may be located on the trigger and at least one or both of the grip.

[0014] To achieve the above objective, the present invention provides a pistol having an adjustment member for adjusting the position and orientation of the pistol and the human body when the pistol is held, wherein the adjustment member allows for adjustment of at least one of the trigger and the grip by 5 degrees of freedom or less, 6 degrees of freedom or 7 degrees of freedom or more.

[0015] To achieve the above object, a pistol position adjustment mechanism having an adjustment member for adjusting the position and orientation of a pistol with respect to a human body when holding the pistol has an adjustment member, and at least one of the trigger and the grip can be adjusted with 5 degrees of freedom or less, or 6 degrees of freedom, or 7 degrees of freedom or more.

[0016] To achieve the above object, in a rifle or pistol of the present invention, the trajectory of pulling the trigger of the rifle or pistol substantially follows an arc of a circle with a radius from near the second joint of the finger pulling the trigger to the trigger when holding the rifle or pistol.

[0017] To achieve the above object, in a rifle or pistol position adjustment mechanism of the present invention, the trajectory of pulling the trigger of the rifle or pistol substantially follows an arc of a circle with a radius from near the second joint of the finger pulling the trigger to the trigger when holding the rifle or pistol.

Advantages of the Invention

[0018] The present invention can provide a pistol and its position adjustment mechanism that can stably aim and pull the trigger with a simple structure.

Brief Description of the Drawings

[0019] [Figure 1] It is a perspective view of the rifle of the present embodiment. [Figure 2] It is a simplified perspective view of the configuration of the rifle in FIG. 1. [Figure 3] It is a plan view of FIG. 2. [Figure 4] It is a schematic cross-sectional view taken along the line A-A of FIG. 3 (the shoulder rest is not shown). [Figure 5] It is an exploded perspective view of FIG. 2. [Figure 6] It is an exploded perspective view of the trigger assembly shown in FIG. 5. [Figure 7] It is a perspective view showing the assembled state of the trigger assembly shown in FIG. 6. [Figure 8]A view showing a state in combination with the grip and trigger assembly shown in FIG. 5. [Figure 9] An exploded perspective view of the butt portion of the rifle shown in FIG. 2. [Figure 10] A view in which the direction of pulling the trigger of the rifle with the configuration of FIG. 2 simplified is adjusted in roll, pitch, and yaw respectively. [Figure 11] An enlarged front view when FIG. 10 is taken as a plan view. [Figure 12] A planar schematic view showing the state of a human fingertip, wrist to elbow when holding a conventional rifle with the direction of pulling the trigger being behind the gun body. [Figure 13] A front schematic view showing the state of a human fingertip, wrist to elbow when holding a conventional rifle with the direction of pulling the trigger being behind the gun body. [Figure 14] A view in which the X - Y plane is overlaid on a planar schematic view showing the state of a human fingertip, wrist to elbow when holding the rifle of this embodiment with the direction of pulling the trigger adjusted in roll, pitch, and yaw directions respectively. [Figure 15] A view in which the X - Y plane is overlaid on a front schematic view showing the state of a human fingertip, wrist to elbow when holding the rifle of this embodiment with the direction of pulling the trigger adjusted in roll, pitch, and yaw directions respectively. [Figure 16] A view in which the X - Y plane is overlaid on a rear schematic view showing the state when looking from directly behind the shooter, that is, from the rear of the gun body towards the muzzle direction, when holding the rifle of this embodiment with the direction of pulling the trigger adjusted in roll, pitch, and yaw directions respectively. [Figure 17] An exploded perspective view of the pistol of this embodiment. [Figure 18] A perspective view showing the assembled state of the pistol of this embodiment. [Figure 19] A front view of the adjustment member of the second embodiment, and the hatched portion represents a Z - axis brake and a longitudinal sectional view around it. [Figure 20] A perspective view of the adjustment member of the second embodiment. [Figure 21] This is a right side view of the adjustment member in the second embodiment. [Figure 22] This is an exploded perspective view of the adjustment member in the second embodiment. [Figure 23] This figure shows the trajectory of the trigger pull of a rifle or pistol according to the fourth embodiment. [Figure 24] This figure shows the trajectory of pulling the trigger of a rifle or pistol according to the fourth embodiment, and depicts a state where the trigger is pulled more forcefully than in the state shown in Figure 23. [Figure 25] This figure shows the trajectory of pulling the trigger of a rifle or pistol according to the fourth embodiment, and depicts a state where the trigger is pulled even harder than in Figure 24. [Modes for carrying out the invention]

[0020] (The structure, function, and effect of a rifle) The configuration, operation, and effects of the rifle 1 of this embodiment will be described below based on Figures 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, and 16. As shown in Figure 2, the rifle 1 allows rotational adjustment of the direction in which the trigger 10 is pulled, in the direction of rotational roll around the X-axis, the direction of rotational pitch around the Y-axis, and the direction of rotational yaw around the Z-axis. The rotational adjustments for roll, pitch, and yaw are performed along the spherical surface of the spherical part 4 and the spherical surface of the second spherical part 14, which will be described later. Incidentally, in conventional rifles, the direction in which the trigger 10 is pulled is towards the rear of the barrel.

[0021] In this embodiment, both the terms "rotational adjustment" and simply "adjustment" are used. "Rotational adjustment" is used when adjusting along the spherical surfaces of the spherical part 4 and the second spherical part, as shown in Figures 3 and 4. "Simple adjustment" is a concept that includes "rotational adjustment" and also includes adjustments that do not follow the spherical surfaces of the spherical part 4 and the second spherical part.

[0022] As shown in Figures 4 and 5, the rifle 1 broadly consists of a forestock 2, a grip 3, a spherical section 4, a trigger assembly 5, a clamp 6, a stock 7, and a shoulder rest 8. The spherical section 4 connects the forestock 2 and the stock 7 by joints 11 and 12.

[0023] Then, the annular portion 13 of the trigger assembly 5 is fitted into the second spherical portion 14 of the grip 3, and screws 16 are inserted into both of the opposing screw holes 15a and 15b of the trigger assembly 5 to perform screw connection, tightening the second spherical portion 14 with the annular portion 13, and fixing the trigger assembly 5 to the grip 3.

[0024] Then, the hole 17 of the clamp 6 is brought into contact with the spherical surface of the spherical part 4, and screws 19a, 19b, 19c, and 19d are passed through the through-holes 18a, 18b, 18c, and 18d of the clamp 6, respectively. The through-holes 19a, 19b, 19c, and 19d are then screw-connected to the screw holes 20a, 20b, 20c, and 20d located on the upper edge of the second spherical part 14 of the grip 3, thereby fixing them together.

[0025] When screws 19a, 19b, 19c, and 19d are screw-connected to the screw holes 20a, 20b, 20c, and 20d located on the upper edge of the second spherical part 14 of the grip 3, and fixed together, the direction in which the trigger is pulled can be adjusted by rotating it from the rear of the barrel, mainly in the yaw direction, that is, to the left or to the right, as shown in Figure 3. This is because, when the hole 17 of the clamp 6 contacts the spherical surface of the spherical part 4, the contact point can be changed (adjusted), allowing the direction in which the trigger 10 is pulled to be rotated by 5° to 20° from the rear of the barrel, mainly in the yaw direction, that is, to the left or to the right. This is the trigger 10 mechanism of rifle 1.

[0026] Figures 6 and 7 show details of the trigger assembly 5. The trigger assembly 5 has a front-to-back adjustment block 31. The front-to-back adjustment block 31 can be fixed to any position on the rail 32a by hooking its groove 31a onto the rail 32a of the base 32 and moving it to the position indicated by arrow X1, inserting a screw 33 into the screw hole 31b, and narrowing the width of the groove 31a by tightening the screw 33. In other words, the front-to-back position (position in the direction of arrow X1) of the front-to-back adjustment block 31 is adjustable.

[0027] Furthermore, the trigger assembly 5 has a left-right adjustment block 35. The left-right adjustment block 35 has a groove 35a that engages with the protrusions 31c and 31d of the front-rear adjustment block 31. The left-right adjustment block 35 can be moved by hooking its groove 35a onto the rail 31d of the front-rear adjustment block 31 and moving it to arrow Y1, then inserting a screw 36 into the screw hole 35b and tightening the screw 36 to narrow the width of the groove 35a, thereby fixing it to any position on the rail 31d. In other words, the left-right adjustment block 35 is adjustable in left-right position (position in the direction of arrow Y1).

[0028] Furthermore, the trigger assembly 5 has an up-down adjustment block 37. The up-down adjustment block 37 has a groove 37a into which the pole 35c of the left-right adjustment block 35 is inserted. The up-down adjustment block 37 can be fixed at any position of the pole 35c by moving its groove 37a along the pole 35c of the left-right adjustment block 35 along arrow Z1, inserting a screw 38 into the screw hole 37b, and tightening the screw 38 to narrow the width of the groove 37a. In other words, the up-down adjustment block 37 can be adjusted in the up-down position (position in the direction of arrow Z1). The part of the up-down adjustment block 37 performs the function of the trigger 10. In addition, the up-down adjustment block 37 can be adjusted in the yaw direction around the ball 35c as an axis.

[0029] Furthermore, Figure 8 shows the trigger assembly 5 attached to the grip 3. The annular portion 13 of the trigger assembly 5 is positioned and fixed to the spherical portion of the circumferential surface of the second spherical portion 14 of the grip 3. This allows the direction in which the trigger 10 is pulled to be rotated by changing (adjusting) the point of contact between the annular portion 13 of the trigger assembly 5 and the spherical surface of the second spherical portion 14, thereby adjusting the rotational direction of the trigger 10 in terms of rotational roll around the X axis, rotational pitch around the Y axis, and rotational yaw around the Z axis.

[0030] Furthermore, Figure 9 shows the configuration of the shoulder rest 8. First, there is the front-to-back adjustment bar 41a and the recess 42a into which the front-to-back adjustment bar 41a is inserted, and the front-to-back adjustment bar 41b and the recess 42b into which the front-to-back adjustment bar 41b is inserted. The position of the shoulder rest 8 in the front-to-back direction Y1 can be adjusted by how far the front-to-back adjustment bars 41a and 41b are inserted into the recesses 42a and 42b. By changing the insertion depth of the front-to-back adjustment bars 41a and 41b, the shoulder rest 8 can be rotated in the pitch direction.

[0031] Furthermore, it has a left / right adjustment screw 43a, a horizontally elongated hole 44a through which the left / right adjustment screw 43a passes, and a screw tightening hole 45a into which the left / right adjustment screw 43a, after passing through the horizontally elongated hole 44a, is tightened. Furthermore, it has a left / right adjustment screw 43b, a horizontally elongated hole 44b through which the left / right adjustment screw 43b passes, and a screw tightening hole 45b into which the left / right adjustment screw 43b, after passing through the horizontally elongated hole 44b, is tightened. When the left / right adjustment screws 43a and 43b are tightened into the screw tightening holes 45a and 45b, the position of the shoulder rest 8 in the left / right direction X1 can be adjusted by choosing which position in the horizontally elongated holes 44a and 44b to tighten the screws. In addition, by changing the stopping position of the left / right adjustment screws 43a and 43b, the shoulder rest 8 can be rotated in the roll direction.

[0032] The shoulder rest 8 also includes an up / down adjustment screw 46, a screw hole 47 through which the up / down adjustment screw 46 passes, and a block 49 into which the up / down adjustment screw 46, after passing through a vertically elongated hole 48, is screwed. When the up / down adjustment screw 46 is screwed into the screw hole 47 and the block 49, the position of the block 49 in the vertically elongated hole 48 at which it is screwed in can be adjusted to control the vertical position Z1 of the shoulder rest 8.

[0033] Figures 10 and 11 show the trigger 10 after being rotated from the rear of the barrel in the roll, pitch, and yaw directions, respectively. This trigger 10 is a so-called electronic trigger. By rotating the trigger 10 to the left from the rear of the barrel, a right-handed person can pull the trigger 10 in the direction from the wrist to the elbow when aiming the rifle 1.

[0034] Due to the structure of the human body, finger movement is transmitted to the fingers via tendons, resulting from the contraction of muscles located on the wrist side of the elbow. From an ergonomic standpoint, the most responsive and sensitive movement is achieved when the tendon's path is straight. Trigger 10, designed to be pulled from the wrist towards the elbow rather than from the rear of the barrel, eliminates wrist bending, resulting in a straight tendon path. This state, where the muscles and tendons that move the trigger-pulling finger, including trigger 10, are aligned in a straight line, maximizes finger responsiveness and achieves the best mode for high accuracy. The adjustment angle of grip 3 and / or trigger 10 cannot be fixed numerically, as the optimal solution varies depending on the shape and dimensions of the gun, the shooter's physique, and the type of clothing worn. Therefore, the adjustment angle must either be variable, or multiple fixed-value models with different numerical values ​​must be produced and fitted to select the optimal value, similar to choosing clothing sizes.

[0035] Figures 12 and 13 show a human posture holding a rifle 21 with the trigger 10 positioned towards the rear of the barrel, as in the conventional configuration. As shown by the bend in the arm a1, the trigger 10 is pulled with the wrist bent, resulting in an obviously unstable position.

[0036] Furthermore, a component that adjusts the position and orientation between the rifle 1 and the human body when the rifle 1 is held is referred to as an adjustment component. The adjustment component may be present in at least one or both of the trigger 10 and the grip 3.

[0037] Figures 14 and 15 show a human posture holding rifle 1, with the direction of the trigger 10 rotated to the right from the rear of the barrel, so that the trigger is pulled from the wrist to the elbow of the arm pulling the trigger 10. In other words, Figures 14 and 15 show a posture in which the muscles and tendons that move the trigger-pulling finger, including the trigger 10, are in a straight line, or approximately in a straight line. As shown in the bend of the arm a2, the trigger 10 is pulled in a natural, unbent wrist position, resulting in a stable trigger pull. To put it another way, Figures 14 and 15 show a human posture holding rifle 1, with the trigger, including the trigger 10, or the trigger-pulling finger, in the direction of the elbow. Furthermore, if we place the gun on top of the XY plane, which consists of an X-axis where values ​​increase as you move to the right and a Y-axis where values ​​increase as you move upwards, with the trigger 10 as its origin, as shown in Figure 14, then for a right-handed shooter, the direction in which the trigger 10 is pulled will be within the third quadrant (Q3) of the coordinate system. If the gun is placed as shown in Figure 14, then for a left-handed shooter, the direction in which the trigger 10 is pulled will be within the second quadrant (Q2) of the coordinate system with the trigger 10 as its origin. If we place the gun on top of the aforementioned XY plane, with the trigger 10 as its origin, as shown in Figure 15, then regardless of handedness, the direction in which the trigger 10 is pulled will be within the third quadrant (Q3) of the coordinate system with the trigger 10 as its origin. If the aforementioned XY plane is superimposed with the gun at a position where the trigger 10 is the origin, as shown in Figure 16 (viewed from directly behind the shooter, in other words, from the rear of the barrel towards the muzzle), then for a right-handed shooter, the direction in which the trigger 10 is pulled will be within the fourth quadrant (Q4) of the coordinate system with the trigger 10 as the origin. If the aforementioned XY plane is superimposed with the gun at a position where the trigger 10 is the origin, as shown in Figure 16, then for a left-handed shooter, the direction in which the trigger 10 is pulled will be within the third quadrant (Q3) of the coordinate system with the trigger 10 as the origin.

[0038] (Main effects obtained by this embodiment) A rifle 1 and trigger 10 mechanism can be provided that allow for stable aiming and trigger pulling by simply adjusting the direction in which the trigger 10 is pulled, by rotating it to the left from the rear of the barrel.

[0039] Furthermore, the rifle 1 and trigger 10 mechanism allow adjustment of the direction in which the trigger 10 is pulled, not only left and right, i.e., in the yaw direction, but also in the roll and pitch directions. In other words, the rifle 1 and trigger 10 mechanism allow adjustment of the direction in which the trigger 10 is pulled in the XYZ axis directions. For example, as shown in Figures 6 and 7, the trigger assembly 5 itself allows adjustment of the direction in which the trigger 10 is pulled in the X1, Y1, and Z1 axis directions.

[0040] Furthermore, as shown in Figure 8, when the trigger assembly 5 is attached to the grip 3, the annular portion 13 of the trigger assembly 5 is positioned and fixed to the spherical portion of the circumferential surface of the second spherical portion 14 of the grip 3. This means that the grip 3 can be adjusted in the RPY (roll, pitch, yaw) directions. In addition, from the above, the relative position of the grip 3 and the trigger 10 can be adjusted in the XYZ directions, and the relative posture can be adjusted in the RPY direction, for a total of 6 degrees of freedom.

[0041] Furthermore, as shown in Figure 9, the shoulder rest 8 is adjustable in the X2, Y2, and Z2 axis directions. This eliminates problems such as the optimal relative position between the shoulder rest 8 and the grip 3 differing due to variations in the physique of each shooter.

[0042] (Other forms) The rifle 1 according to the above-described embodiment is an example of a preferred form of the present invention, but is not limited thereto, and various modifications can be made without changing the gist of the present invention.

[0043] For example, the rifle 1 of this embodiment is designed for right-handed people, so it is assumed that the trigger 10 will be pulled with the index finger of the right hand, and the direction in which the trigger 10 is pulled is adjusted to rotate to the left from the rear of the barrel. However, the rifle 1 for left-handed people is designed assuming that the trigger 10 will be pulled with the index finger of the left hand, and the direction in which the trigger 10 is pulled is adjusted to rotate to the right from the rear of the barrel.

[0044] Furthermore, in this embodiment, the rifle 1 has the trigger 10 adjusted to the left. However, the direction of pulling the trigger 10 may also be adjusted to the left or right, and / or forward or backward, and / or upward or downward. Moreover, in this embodiment, the rifle 1 may also have the trigger adjusted to the roll, and / or pitch, and / or yaw directions.

[0045] Therefore, the second spherical part 14 does not necessarily have to be spherical. However, if you want to adjust the rotation of the trigger assembly 5, you can make the second spherical part 14 spherical. Also, the adjustment mechanism for the X2, Y2, and Z2 directions of the shoulder rest 8 shown in Figure 9 is not an essential component and can be omitted.

[0046] Furthermore, the rifle 1 of this embodiment allows the direction in which the trigger 10 is pulled to be rotated 5° to 20° to the left or right from the rear of the barrel. However, this angle can be changed, i.e., an adjustment range can be set, such as greater than 0° to 75°, 1° to 10°, 1° to 30°, 5° to 45°, etc. In addition, the rifle 1 of this embodiment allows the direction in which the trigger 10 is pulled to be adjusted within an adjustment range of greater than 0° to 30° upwards from the rear of the barrel, and greater than 0° to 75° downwards. These adjustment ranges are ergonomically appropriate for any person to pull the trigger stably. For example, the reason why the adjustment range for the direction in which the trigger 10 is pulled is set wider downwards than upwards from the rear of the barrel is that, when a shooter is holding the rifle 1, it is natural and comfortable for the elbow of the arm pulling the trigger 10 to be below the shoulder and closer to the shoulder than the trigger. This generally applies to shooters with a standard build. Additionally, the grip 3 and / or trigger 10 may be equipped with X, Y, Z, roll, pitch, and yaw adjustment mechanisms.

[0047] Furthermore, although this embodiment has been described using rifle 1 as an example, it goes without saying that it can also be applied to other firearms, such as pistols (short guns, handguns), machine guns, and sporting guns. It can also be applied to rifles other than rifles. Military firearms generally do not require extreme accuracy, and it is important that they are inexpensive, can be mass-produced, are easy to handle, and do not malfunction. Among those that meet these conditions, models with good accuracy are often selected for sniping. This embodiment is also suitably applied to firearms intended for sporting purposes, i.e., target shooting competitions and hunting. Target shooting competition guns and hunting guns are not bound by the requirements of military firearms, and high accuracy is required. Among them, target shooting competition guns are not bound by the requirements of military firearms, and extreme accuracy is required. It should be noted that hunting guns or low-grade, inexpensive target shooting competition guns may be repurposed for military use.

[0048] For example, the pistol 51 according to this embodiment will be described using Figures 17 and 18. Since the pistol 51 basically has almost the same configuration as the rifle 1, the reference numerals assigned to each component of the pistol 51 are the same as those assigned to the components of the rifle 1 that perform the same function, and the description of each component will be omitted.

[0049] Furthermore, in the case of a pistol, from an ergonomic standpoint, when the pistol is held in a state of maximum response sensitivity, the muzzle will not point towards the target. It was found that when gripping the pistol with the right arm and pulling the trigger with the right index finger, the most stable way to aim the pistol is to rotate the trigger clockwise around the Z3 axis in Figure 18, slightly clockwise around the X3 axis, and slightly counterclockwise around the Y3 axis.

[0050] Furthermore, while the trigger 10 of rifle 1 employs a so-called electronic trigger, the use of so-called mechanical triggers such as hydraulic, wire, or linkage triggers is also possible for the following reasons. For example, a hydraulic trigger can be implemented by connecting a hydraulic tube from the trigger assembly 5 to the gun's receiver. A wire trigger can be implemented by connecting a wire, similar to a bicycle brake or gear shift wire, from the trigger assembly 5 to the gun's receiver. In addition, a linkage trigger can be implemented by connecting the trigger's movement to the gun's receiver via a lever or linkage. However, with an electronic trigger, the mechanical connection between the receiver and the trigger is unnecessary, making the construction of rifle 1 easier.

[0051] Furthermore, in this embodiment, the rifle 1 allows the direction in which the trigger 10 is pulled to be rotated to the left or right from the rear of the barrel. However, the direction in which the trigger 10 is pulled may be fixed after being rotated to the left or right from the rear of the barrel. Moreover, the adjustment mechanism may be omitted, and the rotation angle may be predetermined during molding. In other words, the adjustment mechanism may be omitted to reduce costs by pre-adjusting the XYZRPY directions to match the physique of an average shooter.

[0052] Furthermore, in this embodiment, the trigger mechanism 10 of the rifle 1 rotates the direction in which the trigger 10 is pulled from the rear of the barrel to the left or right by changing (adjusting) the point of contact when the hole 17 of the clamp 6 contacts the spherical surface of the spherical part 4. However, the trigger mechanism 10 of the rifle 1 is not limited to this mechanism, and various mechanisms can be adopted that allow the direction in which the trigger 10 is pulled to be rotated in roll, pitch, and yaw directions.

[0053] Furthermore, the X, Y, and Z axes shown in Figure 2, the arrows X1, Y1, and Z1 shown in Figure 6, the X2, Y2, and Z2 directions shown in Figure 9, and the X3, Y3, and Z3 axis directions shown in Figures 16 and 17 are all letters that generally represent three-dimensional coordinates.

[0054] (Second Embodiment) The following describes the configuration of the adjustment member 60 for adjusting the position and orientation between the rifle 1 and the human body when the rifle 1 is held, according to the second embodiment. In addition to the trigger 10 and grip 3, at least one of the stock 7 (cheek rest), shoulder rest 8 (shoulder rest), and forend 9 (shown in Figure 1) may each be adjustable to 6 degrees of freedom. The 6 degrees of freedom adjustment involves adjusting the direction in which the trigger 10 is pulled to roll, pitch, and yaw. By configuring the rifle 1 and its trigger mechanism in this way, it becomes easier to adapt to the shooter's physique, build, and shooting posture, and an improvement in accuracy can be expected. While the 6 degrees of freedom adjustment is the basic configuration, it is also possible to adjust to 7 or more degrees of freedom, or to omit adjustment to 5 degrees of freedom or less, and select through fitting. Custom-made rifles with the best fitting are also possible.

[0055] Here, Figures 19, 20, 21, and 22 show an adjustment member 60 for adjusting the six degrees of freedom. The adjustment member 60 includes a base 61, a Z-axis slider 62, a Y-axis brake 63, a Y-axis slider 64, an X-axis slider 65, and a ball joint 66.

[0056] The base 61 has through holes 611 and 612 that penetrate from its top surface to its bottom surface. The base 61 also has an elongated through groove 613 that connects the sides of the through holes 611 and 612 and penetrates from the top surface to the bottom surface of the base 61.

[0057] Then, one pole 621, which is fixed to the upper surface of the Z-axis slider 62, is inserted into the through hole 611 from the lower surface of the base 61, and the other pole 622 is inserted into the through hole 612 from the lower surface of the base 61. With that in place, screw 614 is inserted into screw hole 616, and screw 615 is inserted into screw hole 617.

[0058] Screw 614 is screwed in from the front side 613a of the through groove 613 in screw hole 616, across the through groove 613, to the back side 613b of the through groove 613. Similarly, screw 615 is screwed in from the front side 613a of the through groove 613 in screw hole 617, across the through groove 613, to the back side 613b of the through groove 613. In screw holes 616 and 617, the back side 613b of the through groove 613 has a screw thread, but the front side 613a of the through groove 613 in screw holes 616 and 617 does not have a screw thread. Therefore, screws 614 and 615 are screwed in only to the back side 613 of the through groove 613, and the head bearing surfaces of screws 614 and 615 collide with the circumferential surfaces 618 and 619 at the entrances of screw holes 616 and 617, respectively. Then, by tightening the screw, the inner side 613b of the through groove 613 is pulled toward the screw head, thereby applying force to narrow the groove width of the through groove 613.

[0059] As a result, the width of the through groove 613 gradually narrows, and the diameters of the through holes 611 and 612 decrease, causing the through hole 611 to tighten around the circumferential surface of pole 621, and the through hole 612 to tighten around the circumferential surface of pole 622. Thus, the through hole 611 and pole 621, and the through hole 612 and pole 622 are both fixed in place. With this, the position adjustment of the base 61 becomes possible, with the poles 621 and 622 fixed in the desired position, and the height (in the Z-axis direction as shown in Figure 22) can be adjusted.

[0060] Next, the Y-axis rail 641 on the upper surface of the Y-axis slider 64 and the Y-axis engaging portion 623 on the lower surface of the Z-axis slider 62 are engaged. This causes the Y-axis rail 641 and the Y-axis engaging portion 623 to slide in the Y-axis direction as shown in Figure 22, allowing for position adjustment in the Y-axis direction. Then, before inserting the screw 614 into the screw hole 616 and the screw 615 into the screw hole 617, the Y-axis brake 63 is inserted into the square hole 624 of the Z-axis slider 62. After insertion, the screw 626 is inserted into the screw hole 625 formed on the side of the Z-axis slider 62 and tightened, thereby pressing the Y-axis brake 63 against the Y-axis rail 641 and determining the fixed position of the Y-axis rail 641 and the Y-axis engaging portion 623.

[0061] Next, the X-axis rail 642 on the lower surface of the Y-axis slider 64 and the X-axis engaging portion 651 on the upper surface of the X-axis slider 65 are engaged. This causes the X-axis rail 642 and the X-axis engaging portion 651 to slide in the X-axis direction as shown in Figure 22, allowing for position adjustment in the X-axis direction. Then, a screw 653 is inserted into the screw hole 652 formed on the side of the X-axis slider 65, and the groove 654 is tightened with the screw. This narrows the width of the groove 654, which in turn narrows the width of the X-axis engaging portion 651, causing the X-axis rail 642 and the X-axis engaging portion 651 to press against each other and be fixed together. This determines the fixed position of the X-axis rail 642 and the X-axis engaging portion 651. The mechanism for narrowing the width of the groove 654 is the same as the mechanism for narrowing the width of the through groove 613.

[0062] Next, a spherical ball 655, which is attached to the underside of the X-axis slider 65, is inserted into the hole 661 of the ball joint 66. The ball joint 66 is made of hard rubber, and by applying force in the direction of arrows a, a to open the groove 662, the hole 661 elastically deforms and expands in a direction perpendicular to the groove 662. When the ball 655 is inserted into the hole 661 in this state and the force applied in the direction of arrows a, a is released, the elastic deformation of the ball joint 66 is also released, returning it to its state before elastic deformation. The shape of the hole 661 is spherical, and its diameter is slightly larger than the diameter of the ball 655. Therefore, when the ball 655 is inserted into the hole 661, the ball 655 can rotate in three axial directions within the hole 661.

[0063] Then, a screw 665 is inserted into a screw hole 663 on the side of the ball joint 66, and a screw 666 is inserted into a screw hole 664 on the side of the ball joint 66, and the screws are tightened. As a result, the width dimension of the groove 662 is narrowed, which in turn narrows the diameter dimension of the hole 661, and the ball 655 and the hole 661 are fixed together by pressing against each other. The fixing position of the ball 655 and the hole 661 is then determined. The mechanism for narrowing the width dimension of the groove 662 is the same as the mechanism for narrowing the groove width of the through groove 613.

[0064] With this, the adjustment member 60 according to the second embodiment is attached to the stock 7 (cheek rest), shoulder rest 8 (shoulder rest), and forend 9 with its lower surface. The second embodiment can be combined with the simple embodiment. Furthermore, the adjustment member 60 is merely an example and is not limited to those shown in Figures 19, 20, 21, and 22; any member with a similar function can be used.

[0065] Furthermore, the adjustment member 60 only needs to be present in at least one of the stock 7 (cheek rest), shoulder rest 8 (shoulder rest), and forend 9. The mechanism of the adjustment member 60 is also called the position adjustment mechanism.

[0066] (Third embodiment) The third embodiment concerns a pistol that converts a rifle into a pistol and has an adjustment member to adjust the position and orientation of the pistol and the human body when it is aimed. In this pistol, the adjustment member has six degrees of freedom of adjustment for at least one of the trigger and the grip. This is because, in the case of a pistol, the gun and the shooter come into contact at only two points: the grip and the trigger. While six degrees of freedom of adjustment is the basic setting, it is also possible to select seven or more degrees of freedom of adjustment, or to omit adjustments of five degrees of freedom or less, through fitting. Custom-made pistols with the best fitting are also possible.

[0067] Furthermore, this invention relates to a pistol position adjustment mechanism having an adjustment member for adjusting the position and orientation of the pistol and the human body when the pistol of the third embodiment is held. In this position adjustment mechanism, the adjustment member is such that at least one of the trigger and the grip can each be adjusted to 6 degrees of freedom. This is because, in the case of a pistol, the gun and the shooter come into contact at only two points: the grip and the trigger.

[0068] This pistol may be the same as the one shown in Figures 17 and 18, or it may be a different pistol. Also, the adjustment member may be the same as the adjustment member 60 shown in Figures 19, 20, and 21, or it may be a different adjustment member. If the adjustment member 60 is used, it is preferable to attach its lower surface to the trigger and at least one of the grips.

[0069] (Fourth embodiment) Figure 23 shows the trajectory 81 of the trigger 80 of the rifle or pistol according to the fourth embodiment. Figure 24 shows the trajectory 81 of the trigger 80 of the rifle or pistol according to the fourth embodiment, and shows the state in which the trigger 80 is pulled more strongly in the direction of the arrow 82 than in the state in Figure 23. Figure 25 shows the trajectory 81 of the trigger 80 of the rifle or pistol according to the fourth embodiment, and shows the state in which the trigger 80 is pulled even more strongly in the direction of the arrow 82 than in the state in Figure 24.

[0070] Figures 23, 24, and 25 show that the trajectory 81 of pulling the trigger 80 of a rifle or pistol roughly follows the arc of a circle (i.e., the trajectory 81) whose radius is from the center of rotation 83 near the second joint of the finger pulling the trigger 80 when the rifle or pistol is held.

[0071] Here, "near the second joint of the finger pulling the trigger 80" includes the second joint of the finger pulling the trigger 80 itself. Furthermore, the range of this "near the second joint" is both palmar-facing than the first joint of the finger pulling the trigger 80, and fingertip-facing than the palm. The finger pulling the trigger 80 is usually the index finger, and is depicted as such in Figures 23, 24, and 25. However, the finger pulling the trigger 80 may also be the middle finger, etc.

[0072] By employing the rifle or pistol of the fourth embodiment and its position adjustment mechanism, it is possible to provide a rifle or pistol with good ergonomic response sensitivity. The rifle or pistol of the fourth embodiment can be manufactured by providing a trigger assembly having a trigger 80 that rotates on the trajectory 81, with the rotation axis coaxial with the rotation center 83 of the trajectory 81 that pulls the trigger 80. [Explanation of symbols]

[0073] 1. Rifle (gun) 3 Grips 7. Stock (cheek rest) 8. Shoulder rest (shoulder attachment part) 9 Forehead section 10 Trigger

Claims

1. A rifle having an adjustment member for adjusting the position and orientation of the rifle and the human body when the rifle is held, The adjustment member is a rifle in which at least one of the cheek rest, shoulder rest, and forend is adjustable to six or seven or more degrees of freedom.

2. The rifle according to claim 1, wherein the adjustment member is provided on the trigger and at least one or both of the grips.

3. A rifle position adjustment mechanism having an adjustment member for adjusting the position and orientation of the rifle and the human body when the rifle is held, The aforementioned adjustment member allows for adjustment of at least one of the trigger, grip, cheek rest, shoulder rest, and forend, each with six or more degrees of freedom. Rifle position adjustment mechanism.

4. The adjustment member is provided on the trigger and at least one or both of the grip, the rifle position adjustment mechanism according to claim 3.

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