JP2006300462A - Electric gun - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve certainty of switching while maintaining the basic constitution of an electric gun. <P>SOLUTION: The electric gun is constituted to accumulate pressure in a spring while driving a movable member of an air cylinder device in a retreating direction by a motor and to control an operating circuit of a driving part by trigger operation, wherein a driving part 22 has a sector gear 27 meshed with a rack provided in the moving direction of the movable member 15 to retreat the movable member 15 by the rotation of the sector gear 27, and a cutoff lever 36 engaged with a cutoff member 32 provided in the moving direction of the movable member 15 when the movable member retreats, to turn off a switch 40 of the operating circuit. A current flowing to the motor 30 is cut off by turning off the switch 40, and when the sector gear 27 is rotated by the inertial rotation of the motor 30 and detached from the mesh with the rack 25, the movable member 15 is advanced by the release of the pressure-accumulated spring 17 and can be engaged with a trigger part. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electric gun that drives a piston of an air cylinder device in a backward direction by a motor, accumulates a spring, and controls an operation circuit of a drive unit by a trigger operation.

  In this type of prior art, there is an invention represented by Japanese Patent Laid-Open No. Hei 3-221793, which has been used for many years in the electric air gun of the applicant company. In this invention, air is sucked into the cylinder by the backward movement of the piston, and at the same time, the compression spring is accumulated, the air is compressed by the forward movement, and the bullet is fired by the jetting air. A drive unit having a rotating wheel that rotates, and an operation unit that controls a switch of a circuit that operates a motor of the drive unit by a trigger operation. Then, the cam is engaged with a cam provided coaxially with the rotating wheel of the drive unit, and the cam and the shear are interlocked using a tappet arm at a timing when the engagement with the trigger is released after the shear switch operation is completed.

In the above configuration, two members of a shear and a tappet arm are required between the cam and the switch, and the trigger is disengaged and disengaged, resulting in a complicated structure. In addition, the on / off of the switch by the shear slide sometimes becomes uncertain, and effective improvement measures have been demanded.

Japanese Patent Laid-Open No. 3-221793 Japanese Utility Model Publication 3-104688 Japanese Utility Model Publication 3-104689

  The present invention has been made in view of the above circumstances, and its object is to improve the certainty of switching while maintaining the basic configuration of the electric gun as it is. Another object of the present invention is to easily obtain the optimum setting for switching by making the amount of movement of the switch movable part adjustable.

  In order to solve the above-described problems, the present invention relates to an electric gun that drives a movable member of an air cylinder device in a backward direction by a motor, accumulates a spring, and controls an operation circuit of a drive unit by a trigger operation. The drive unit has a sector gear that meshes with a rack provided in the moving direction, and the movable member is retracted by the rotation of the sector gear. A cut-off lever that sometimes engages and switches off the operating circuit, and when the switch is turned off, the motor is de-energized, and then the sector gear rotates due to the inertial rotation of the motor and is released from meshing with the rack. Then, the movable member moves forward by releasing the accumulated spring and can be engaged with the trigger portion. In which took measures that.

  In the present invention, compressed air is generated by an air cylinder device. The structure of the air cylinder device is composed of a cylinder and a piston, and the piston is usually moved and compressed. However, there is also a method in which an inner member that hits the piston is fixed, and a member that hits the outer cylinder is moved and compressed. Although the present invention describes that the piston is moved in the embodiment, since the piston and the cylinder can be grasped as a combination of the movable member and the fixed member, there is no difference between the piston and the cylinder.

  The switch for electrically controlling the operating circuit is composed of a fixed switch portion fixed to the gun body side and a movable switch portion provided so as to be movable, and a contact point between the fixed switch portion and the movable switch portion is in contact. It is desirable to have a configuration in which the operating circuit is energized and the operating circuit is de-energized when the contacts are separated. In this case, it is desirable to adopt a configuration in which the switch is kept on by the trigger, and the trigger and the switch are disengaged by the trigger operation so that the power supply to the motor is cut off.

  One feature of the present invention is that it has a configuration in which a cut-off lever is provided for switching control, thereby moving the movable switch portion of the operating circuit to perform switching. The cut-off lever is a means for switching off the operating circuit. For example, the cut-off lever is engaged with and moved by a cut-off member provided so as to be movable in the moving direction of the piston, thereby performing switching. Is. The cutoff lever is moved by a cutoff member that operates in conjunction with the piston. In the present invention, two methods are used to move the cutoff member. One is a method in which a cut-off gear is provided coaxially with the sector gear of the drive unit and connected to the cut-off member, and the other is a method in which the cut-off member is connected in the direction in which the cut-off member is retracted when the piston is retracted. In either case, the cut-off lever rotates and switches the switch.

Furthermore, the cut-off lever may be configured to have a first arm that is rotatably supported on the gun body side and that engages with the cut-off member, and a second arm that contacts the movable switch portion. it can. A protrusion is provided on the cut-off member, and the amount of rotation of the cut-off lever due to the engagement of the first arm is determined by the height of the protrusion. Further, the cut-off member is provided with a protrusion that contacts and rotates the first arm of the cut-off lever, and the first arm and the second arm are in a ratio that amplifies or decreases the amount of rotation by the protrusion. The length can be set. That is, if the second arm is longer than the first arm, the rotational output of the cutoff lever is amplified, and conversely, if the second arm is shorter, the output is reduced. The combination of these heights and arm ratios provides the necessary movement to switch the switch.

  Since the present invention is configured and operates as described above, the basic configuration of the electric gun in which the compressed air generation by the piston cylinder device and the switching of the operation circuit for driving the motor are performed by the trigger operation is maintained. In addition, the amount of rotation, stroke, and the like can be adjusted by performing switching with a cut-off lever, thereby improving the certainty of switching. In addition, the optimum conditions for switching can be determined more easily and reliably.

  Hereinafter, the present invention will be described in more detail with reference to the illustrated embodiments. 1 to 6 show Example 1 of an embodiment of an electric gun according to the present invention. In Example 1, 11 is an air cylinder device, and a cylinder 12 has a jet port 13 of compressed air at the tip, is disposed coaxially and rearward with the barrel 14 of the gun body 10, and is a piston that is a movable member from the rear opening of the cylinder. 15 is inserted so that it can move forward and backward. The piston 15 has a seal member 16 such as an O-ring provided at the front end portion, and obtains airtight slidability with the inner wall of the cylinder. The compression spring 17 that accumulates pressure by retreating the piston 15 is attached to the piston at the front, while the rear part is attached to the base of the spindle 18 fixed to the gun body 10, and when the accumulated pressure is released, the piston is instantaneously released. It has a strong spring force to push out 15. In addition, in order to open the loading section when the bullet is fed, it has a cylindrical portion 19 which can be inserted and slid at the outer periphery of the jet nozzle 13 at the tip, and engages with the tappet pin 21 of the driving portion 22 at the rear end. A tappet member 20 having a downward locking portion 23 that can be retracted by a distance required for the bullet is provided, and a front rising portion thereof is always urged by a spring 24 so as to hit the cylinder front wall.

  In order to drive the piston by the drive unit 22, a rack 25 having a large number of teeth is provided on the lower surface of the piston 15 along the moving direction. The first teeth 26 are larger than the other rack teeth to ensure that the sector gear 27 is engaged. The sector gear 27 has a tooth portion 28 and a toothless portion 29 having a small diameter so as not to mesh with the rack tooth 25 and prevent the movement of the piston 15. That is, the rack teeth 25 are provided over a length necessary to retract the piston 15 by one stroke, and the piston 15 is moved backward by the rotation accompanying the meshing of the teeth 28 of the sector gear 27 from the start to the end. Done. Such a sector gear 27 has a reduction gear set configuration, and is linked to the motor 30 via a transmission means 39 having a reverse rotation prevention unit 50.

  The sector gear 27 has a cut-off gear 31 that is provided coaxially. The cut-off gear 31 is engaged with the cut-off member 32, thereby causing the cut-off member 32 to retreat. That is, the cut-off member 32 has a front-rear direction tooth row 33 that engages with the cut-off gear 31, and when the engagement with the tooth row 33 is released by a spring 34 biased forward, the cut-off member 32 returns to a forward fixed position. It is supposed to be. Reference numeral 35 denotes a protrusion, which is provided on the lower surface of the cut-off member 32, contacts a first arm 37 of a cut-off lever 36 described later, and rotates the cut-off lever 36 by a required angle. The cut-off lever 36 is rotatably supported on the gun body side, and has a first arm 37 that contacts the cut-off member 32 and a second arm 38 that contacts the movable switch portion 41.

The movable switch part 41 constitutes a switch 40 together with a fixed switch part 42 fixed to the gun body side, and the operating circuit is energized by contact between the fixed switch part 42 and the movable part switch 41, When the contact is separated, the operating circuit is de-energized. The movable switch portion 41 is in a state of being biased by a spring 44 in a direction in which the contact is separated. In this state, the movable switch portion 41 is provided so as to be movable in the front-rear direction and the up-down direction. The trigger 45 is provided so as to be disengaged from the movable switch portion 41 by a trigger operation. 46 is an engaging portion on the movable switch side, which engages with the engagement partner 47 of the trigger 45 and engages with the engagement partner 47 again after being disengaged. A guide slope 48 that causes the portion 46 to fall into the engagement partner 47 is provided. The trigger 45 is also urged in the returning direction by a spring (not shown).

  The operation of the example 1 of the electric gun of the present invention having such a configuration will be described with reference to FIGS. Although FIG. 1 does not operate anything, the bullet B is packed in the magazine, and the operation ready circuit of the drive part 22 shows the ready state of the launch which can supply the electric power from a power supply device. Although any power supply device may be used, a rechargeable battery is optimal from the standpoints of gun operability and ease of handling.

  When the trigger 45 is pulled, the movable switch 41 engaged with the trigger 45 is advanced, and the switch 40 is brought into the state shown in FIG. 2 in contact with the fixed switch 42 (FIG. 2), the motor 30 rotates, and the drive unit. 22 starts operation. As a result, the sector gear 27 starts to rotate (FIG. 2), its tooth portion 28 comes in mesh with the first tooth 26 of the rack 25, and the piston 15 starts to retract (FIG. 2).

  Further, the sector gear 27 further rotates, and the piston 15 continues to move backward. During that time, the cut-off gear 31 coaxial with the sector gear 27 is engaged with the tooth row 33 of the cut-off member 32, so that the cut-off member 32 also moves backward. (FIG. 2). When the cut-off member 32 moves backward and the protrusion 35 provided there comes into contact with the first arm 37 of the cut-off lever 36, the first arm 37 is pushed by the height of the protrusion 35, and the cut is made. The off lever 36 rotates counterclockwise as a whole in FIG. Along with this, the movable switch portion 41 interlocked with the second arm 38 of the cut-off lever 36 is lifted (FIG. 3) and moved in a direction in which the engagement with the trigger 45 is released.

  Further, in the stage from FIG. 2 to FIG. 3, the tappet pin 21 provided on the sector gear 27 is engaged with the locking portion 23, the tappet member 20 is temporarily retracted, and the loading portion 49 is opened. One bullet B pushed from below is fed into the bullet 49. The bullet B is pushed forward by the tubular portion 19 by the advance of the tappet member 20 and is held at a fixed position at the rear of the barrel until firing.

The movable switch part 41 released from the engagement with the trigger 45 is retracted by the spring 44 and is separated from the fixed switch part 42, and the contact is opened to cut off the power supply to the motor 30 (FIG. 3). When the power supply is cut off, the motor 30 will eventually stop, but the inertial rotation continues until the motor 30 stops, during which the piston 15 continues to retract further, and finally the tooth portion 28 of the sector gear 27 moves to the piston 15. The state of disengagement from the rack 25 is reached (FIG. 4). As a result, the piston 15 is instantaneously moved forward by the elastic force of the compressed spring 17, and the compressed air generated thereby is ejected from the ejection port 13 to fire the bullet B held in the bullet loading portion 49. (Fig. 4).

In parallel with this, since the meshing of the tooth portion of the cut-off gear 31 and the tooth row 33 of the cut-off member 32 is finished, the cut-off member 32 advances instantaneously, and the cut-off lever 36 is moved by the first arm 37. It is rotated by the engagement with the protrusion 35 in the clockwise direction opposite to the above. As a result, the guide slope 48 of the movable switch portion 41 is positioned on the engaging portion 46 of the trigger 45 (FIG. 4).

  When the motor 30 is stopped, the drive unit 22 returns to the firing preparation complete state, and the engagement portion 46 of the trigger 45 is engaged with the engagement partner 47 of the movable switch portion 41 (FIG. 6). In this state, the switch 40 is cut in the same manner as in FIG. 1, the piston 15 is also in the forward position, and the cut-off lever 36 and all related parts are returned to the same ready-to-fire state as in FIG. (FIG. 6).

7 to 12 show Example 2 of the embodiment of the electric gun according to the present invention. In this example 2, the rear part of the cut-off member 32 'is extended to provide an engagement protrusion 51, and the engagement protrusion 51 is engaged with a part on the piston side at an appropriate time during the retreat of the piston 15. Thus, the cut-off member 32 'is retracted. Therefore, in Example 2, the cut-off gear 31 is not necessary.

  Also in Example 2, in the ready state for launch, the cut-off member 32 ′ is biased forward by the spring 52 and takes a fixed position. Further, the cut-off member 32 ′ has long protrusions 35 ′ at the front and rear, and engages with the first arm 37 of the cut-off lever 36 for a longer time than in the first example, so that the cut-off lever 36 is required. Rotate the angle. The cut-off lever 36 is rotatably supported by the gun body, has a second arm 38 together with the first arm 37, and interlocks with the movable switch portion 41. Other configurations may be the same as those in Example 1, so that reference numerals are used and detailed description thereof is omitted. Further, the height of the projection 35 ′ of the cut-off member 32 ′, the length of the first arm 37 engaged with the projection 35 ′, and the second arm 38 having an arbitrary ratio with the first arm 37 are provided. It is the same as in the case of Example 1 that the movable amount of the movable switch portion 41 can be arbitrarily changed by setting the dimensions appropriately.

The operation of the electric gun example 2 of the present invention will be described with reference to FIGS.
FIG. 7 is in a ready state for launching, as in FIG. 1. When the trigger 45 is pulled, the movable switch 41 engaged with the trigger 45 moves forward and the switch 40 is turned on (FIG. 8), and the motor 30 starts. Then, the sector gear 27, which is the output gear of the drive unit 22, starts to rotate, and the tooth portion 28 is engaged with the first tooth 26 of the rack 25, so that the piston 15 begins to retract (FIG. 8).

When the sector gear 27 rotates, the piston 15 continues to move backward, and the rear end thereof engages with the engaging protrusion 51, the cut-off member 32 'also moves backward (FIG. 9). When the cut-off member 32 ′ is retracted and the projection 35 ′ provided there comes into contact with and engages with the first arm 37 of the cut-off lever 36, the first arm 37 becomes higher than the projection 35 ′. By being pushed down by that amount, the entire cut-off lever rotates counterclockwise in FIG. 9, and accordingly, the movable switch portion 41 interlocked with the second arm 38 is lifted (FIG. 9), and the engagement with the trigger 45 is performed. Move in the direction of detachment. 8 to 9, the tappet member 20 that engages and disengages with the tappet pin 21 reciprocates, and the bullet B is loaded into the one-shot bullet unit 49.

  The movable switch part 41 released from the engagement with the trigger 45 is retracted by the spring 44 and separated from the fixed switch part 42, the switch 40 is cut off and the power supply to the motor 30 is cut off (FIG. 10). Even if the power supply is cut off, the inertial rotation continues until the motor 30 stops supplying power until it stops, so that the piston 15 is further retracted and the tooth portion 28 of the sector gear 27 and the rack 25 are engaged. When the end of the toothless portion 29 is reached, the bullet spring 29 is instantaneously moved forward by the elastic force of the compressed spring 17, and a single bullet B held in the bullet loading portion 49 is fired by the generated compressed air. (FIG. 10).

  As the piston 15 advances, the cut-off member 32 'engaged with the rear end thereof is also rotated in the clockwise direction opposite to the above by the engagement with the projection 35'. Is positioned above the engaging portion 46 of the trigger 45 (FIG. 11). Then, when the motor 30 is stopped, the drive unit and the related units return to the ready state for firing (FIG. 12).

As described above, the electric gun according to the present invention is configured such that the switch 40 of the operating circuit that drives the motor 30 is performed by the rotation of the cut-off lever 36, and the cut-off gear 31 is coaxial with the sector gear 27. Alternatively, it can be performed by the engaging projection 51 moved by the retraction of the piston 15. The cut-off lever 36 has a variable amount of rotation depending on the height of the projections 35 and 35 ′ of the cut-off members 32 and 32 ′, and is also a movable switch depending on the ratio of the lengths of the first arm 37 and the second arm 38. The movement relative to the portion 41 can be adjusted, and the rotation state is maintained while the length of the protrusions 35 and 35 'continues. Therefore, the switch 40 can be turned off more reliably.

Internal explanatory drawing which shows the firing preparation completion state of Example 1 of the electric gun according to the present invention. The internal explanatory view showing the state where the trigger was pulled and the switch was turned on. Internal explanatory drawing which shows the state which the cut-off gear began to rotate. An internal explanatory view showing a state where a switch is turned off and a bullet is fired. Internal explanatory drawing which shows the state which a trigger returns to the original. Explanatory drawing of the state which complete | finishes 1 time of operation | movement and returns to completion of launch preparation. Explanatory drawing which shows completion of firing preparation of Example 2 of the electric gun according to the present invention. The internal explanatory view showing the state where the trigger was pulled and the switch was turned on. Internal explanatory drawing which shows the state which the cut-off gear began to rotate. An internal explanatory view showing a state where a switch is turned off and a bullet is fired. Internal explanatory drawing which shows the state which a piston stops and a trigger returns. Explanatory drawing of the state which complete | finishes 1 time of operation | movement and returns to completion of launch preparation.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Gun main body 11 Air cylinder apparatus 12 Cylinder 15 Piston as a movable member 17 Compression spring 20 Tappet member 22 Drive part 24, 34, 44 Spring 25 Rack tooth 27 Sector gear 28 Tooth part 29 Toothless part 30 Motor 31 Cut-off gear 32 , 32 'Cut-off member 35 Projection 36 Cut-off lever 37 First arm 38 Second arm 40 Switch 41 Movable switch 42 Fixed switch 45 Trigger 46 Engagement part 47 Engagement partner 48 Guide slope 51 Engagement protrusion 52 Spring

Claims (6)

An electric gun that drives a movable member of an air cylinder device in a backward direction by a motor, accumulates a spring, and controls an operation circuit of a drive unit by a trigger operation,
The drive unit has a sector gear that meshes with a rack provided in the moving direction of the movable member, and a structure in which the movable member is moved backward by rotation of the sector gear, and a cut-off member that is also provided in the moving direction of the movable member. A cut-off lever that engages when the movable member retracts and switches off the operating circuit;
When the switch is turned off, the motor is de-energized, and then when the sector gear rotates due to the inertial rotation of the motor and comes out of meshing with the rack, the movable member moves forward by releasing the accumulated spring, and the trigger part Electric gun configured to be engageable. The switch is composed of a fixed switch part fixed to the gun body side and a movable switch part movably provided. When the contact point between the fixed switch part and the movable switch part comes into contact, the operating circuit is energized, and the contact is 2. The electric gun according to claim 1, wherein the operating circuit is brought into a non-energized state by being separated. 2. The electric motor according to claim 1, wherein the sector gear has a cutoff gear provided coaxially, has a cutoff gear, and the cutoff gear meshes with the cutoff member and thereby retracts the cutoff member. gun. The cut-off member has an engagement protrusion at the rear portion, and has a structure in which when the movable member is retracted, a part on the movable member side and the engagement protrusion are engaged, thereby retracting the cut-off member. Item 1. The electric gun according to Item 1. The cut-off lever is rotatably supported on the gun body side, and has a first arm that engages with the cut-off member and a second arm that contacts the movable switch portion. Electric gun. The cut-off member is provided with a protrusion that contacts and rotates the first arm of the cut-off lever, and the length of the first arm and the second arm is in a ratio that amplifies or reduces the amount of rotation by the protrusion. The electric gun according to claim 1, wherein is set.

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