阅读说明：本技术 用于武器瞄准构件的弹道修正设备 (Trajectory modification device for weapon aiming member ) 是由 罗伯托·巴乔 朱塞佩·维托利奥·彼得罗内 法布里齐奥·皮亚扎 于 2019-01-28 设计创作，主要内容包括：描述了一种用于装备有仰角调节转台的(武器的)瞄准构件的弹道修正设备。特别地,该设备包括位于转台外部并且用于检测由射击者施加到仰角转台的调节环上的旋转的检测装置,以及用于显示与所述环采取的位置相对应的射击距离和/或其它射击设置的显示装置。该设备为射击者显示从射击者贯穿该设备的那一刻起的转台的校准。射击者不再需要记住最后一次进行的校准。在执行新校准的步骤中,不再需要查阅补偿表,而只需在旋转转台的环时读取该设备上显示的值。还描述了用于修正武器的仰角的方法。(A trajectory modification device for a targeting member (of a weapon) equipped with an elevation adjustment turntable is described. In particular, the device comprises detection means located outside the turntable and intended to detect the rotation applied by the shooter to the adjustment ring of the elevation turntable, and display means intended to display the shooting distance and/or other shooting settings corresponding to the position assumed by said ring. The device shows the shooter the calibration of the turret from the moment the shooter crosses the device. The shooter no longer needs to remember the last calibration performed. In the step of performing the new calibration, it is no longer necessary to consult the compensation table, but only to read the values displayed on the device when rotating the ring of the turntable. A method for correcting the elevation of a weapon is also described.)

1. Ballistic correction device (1, 1') for a sighting member or a lenticular optical element (9) of a weapon equipped with an elevation adjustment turntable (11), the device (1, 1') comprising:

-detection means (7) for detecting the rotation imparted by the shooter to the adjustment ring (12) of the elevation turret (11);

-display means (4) for displaying firing distances (13) and/or other firing settings corresponding to the position of the ring (12);

characterized in that the device is located outside an aiming member (9) combined with the device and is detachably mounted on said aiming member as an accessory.

2. Device (1, 1') according to claim 1, comprising a control unit (8) interacting with said detection means (7) and with said display means (4), wherein said detection means (7) generate an electrical signal representative of the angular position of the elevation adjustment ring (12) or of the amplitude of one rotation of the elevation adjustment ring, and wherein said control unit (8) processes said electrical signal and controls the display of the firing distance (13) corresponding to the angular position of said ring (12) at that moment.

3. Device (1, 1') according to claim 1 or 2, wherein the control unit (8) is of the microprocessor type with program means and an internal memory and is programmed to store the angular positions taken by the ring (12) over time and/or to store the corresponding shot distances (13) and/or other shot settings.

4. Device (1, 1') according to claim 3, wherein the control unit (8) is programmed to automatically convert the signal coming from the detection means (7) into a visual and/or acoustic message, based on a stored conversion table, which visual and/or acoustic message uniquely corresponds to the shooting distance (13) set by the shooter by acting on the ring (12).

5. Device (1, 1') according to any one of the preceding claims, wherein said detection means (7) are tracking means comprising an adjuster (7.1) connected outside the ring (12) of the turret (11) of the lenticular optical element (9) by means of a gear (7.2) or a belt (7.3'), preferably of the potentiometer type.

6. Device (1) according to claim 5, wherein the adjuster (7.1) has a shaft (7.1.1) to which a portable wheel (7.2) is keyed, said wheel being in contact with the outer surface of the ring (12), so that when the ring (12) turns, the wheel rolls and transmits the same rotation to the shaft (7.1.1) of the adjuster (7.1) as the rotation applied to the ring (12).

7. The apparatus (1) according to claim 6, wherein the runner (7.2) is equipped with a circumferential washer (7.3) which acts as a cadence regulator with respect to the outer surface of the ring (12).

8. Apparatus (1') according to claim 5, comprising a drive belt (7.3'), wherein said adjuster (7.1) is equipped with a shaft (7.1.1) connected to said ring (12) by said drive belt (7.3') so as to rotate synchronously with said ring (12).

9. Device (1, 1') according to any one of the preceding claims, comprising fastening means (3) for fixing the device (1) outside the aiming member (lenticular optical element) (9), said detection means (7) being in contact with a ring (12) of the elevation turret (11) or being connected to said ring by a drive belt (7.3').

10. Device (1, 1') according to any one of claims 1-8, wherein said display means comprise a screen (4), optionally of the touch screen type.

11. Device (1, 1') according to any one of the preceding claims, comprising one or more of the following accessories:

-a physical (6) or wireless (14) I/O connection interface to connect an external electronic device with the control unit (8) for reprogramming the same control unit (8) and/or sharing data stored in said control unit (8);

-a GPS module (15) to detect coordinates, preferably at a frequency adjustable from the control unit (8);

-detection means to detect the firing of a weapon incorporating a lenticular optical element (9);

-a user interface (5), such as a keyboard, connected to the control unit (8);

a laser pointer, which preferably is able to detect distance.

12. Device (1, 1') according to any one of the preceding claims, comprising one or more replaceable batteries for supplying electrical energy.

13. Device (1, 1') according to any one of the preceding claims, comprising a control unit (8) having a programmable memory for storing calibrations relating to one or more shooters and/or one or more ammunition types and selectively making the calibrations available to a user when requested by the user.

14. Kit comprising a sighting member (9) equipped with an elevation adjustment turntable (11) and a ballistic correction device (1) according to any one of claims 1-13.

15. A method of correcting the elevation angle of a weapon, such as a rifle (10) or a crossbow, equipped with a sighting member (9) and an elevation adjustment turret (11), comprising:

a) -detecting, by means of an adjuster (7.1) external to said turret (11), the amplitude of the rotation applied by the shooter to the ring (12) of the turret (11);

b) a message (13) is displayed by suitable means (4) external to the turret (11), this message characterizing the firing distance and/or other firing settings associated with the angular position of the ring (12) after each rotation.

16. The method of claim 15, comprising:

-generating, by means of a regulator (7.1), an electrical signal related to the amplitude and direction of each rotation detected by the ring (12);

-processing said signals by means of a control unit (8) and determining the firing distance and/or other firing settings related to the angular position assumed by the ring (12) after each rotation;

-displaying a message (13) on the screen (4) relating to shot distance and/or other shot settings.

Technical Field

The invention relates to a trajectory modification device for a targeting member of a firearm or a crossbow, which is integrated in the targeting member or is suitable for use as a retrofit.

Background

In the field of firearms, use is made of lenticular optical elements, intended to be mounted on a weapon to allow the shooter to aim with the highest possible precision. The lenticular optical element is typically mounted in an elevated position relative to the barrel of the weapon by means of a slider or other reversible mechanical system.

Typically, the lenticular optical elements include crosshairs or horizontal and vertical sighting marks that can be viewed by the shooter through the eyepiece: the cross-hair or the sign defines the optical axis.

Given that the lens-type optical element is not coaxial with the barrel of the weapon, but is located above the barrel, it is clear that if the optical axis remains parallel to the barrel axis, the shooter will not be able to aim the shot: the impact point of the bullet is always low relative to the aiming point.

In practice, therefore, the lenticular optical element is equipped with an adjustment device which acts on the fastening system of the lenticular optical element of the weapon and allows to change the direction of the optical axis so that it intersects the longitudinal axis of the barrel at a desired distance from the weapon.

For example, some telescopic sighting devices, also known as sights, particularly those used for precision rifles, are equipped with "turret" mechanisms for adjusting yaw, elevation, and parallax. By rotating the scale ring of one of the turntable mechanisms, the shooter intervenes in the fastening system of the lens optics of the weapon, changing the drift or the elevation or the parallax accordingly and exclusively, depending on the situation.

More specifically, to compensate for the loss of height or drop of the bullet, the elevation angle needs to be adjusted or calibrated. Under the combined action of the friction force caused by air and gravity, the bullet shot by the firearm does not move along a straight line, but moves through a parabolic track and tends to fall towards the ground; this phenomenon becomes more apparent the further the firearm is from the target when fired. Thus, adjusting the elevation angle allows the point of impact of the bullet to coincide with the aiming point through the lens optics of the weapon at a predetermined distance.

For example, in the case of the telescopic aiming apparatus described above, the ring of the turntable used for adjusting the elevation angle usually displays the letters U and D. The letter U (up) indicates the direction of rotation of the ring in order to guide the upward firing and thus the downward movement of the cross-hair or marker. The letter D (down) indicates the direction of rotation to be applied to the ring in order to direct the downward shot so that the cross-hair or marker moves upward.

In fact, depending on the desired shooting distance, it is sufficient to vary the inclination of the optical axis with respect to the longitudinal axis of the barrel, as long as it acts on the ring of the elevation turret, until compensation for the drop of the bullet is obtained, while continuing to maintain the same aiming point.

The lenticular optical element, e.g. a telescopic aiming device, can be well adjusted when the target to be shot is exactly at the zeroing distance, i.e. at the intersection of the assumed horizontal aiming line and the parabolic trajectory of the bullet.

For the sake of simplicity, the term "firing distance" will be used here and below to denote the "return-to-zero distance" when compensation has taken place, i.e. after the shooter has operated the elevation adjustment ring.

Unadjusted lenticular optics can cause deviations between the line of sight and the point of impact of the bullet, even to several centimeters.

US 7,793,456 describes a typical elevation adjustment turntable system.

In hunting practice, hunters often have to change the elevation adjustment because wild animals are constantly moving. However, frequent interventions on the elevation turret ring can cause several drawbacks.

First, considering that the rings of the elevation turret may make more than one complete rotation, after a certain number of adjustments, the shooter may not remember the last adjustment over time, i.e. may not be able to detect an effective adjustment of the ring, although reading the value represented by the graduated lines on the ring itself. This may lead to errors in subsequent shots. In other words, before making a new adjustment or firing a new shot, the shooter must remember the number of revolutions applied to the ring, i.e. must accurately remember the last adjustment applied and the calibration status of the elevation angle.

Another drawback consists of the fact that it is not easy to read the scale of the scribed lines present on the ring of the turntable, since the numbers engraved on the ring are small and cannot be immediately understood. In fact, the shooter uses conversion tables carried with them, with reference to which the corresponding return-to-zero distance can be uniquely associated with each angular position of the ring and therefore with each readable value on the graduated scale. In addition, the table also allows numerical values to be inserted to obtain the intermediate zeroing distance between the two positions of the ring.

In terms of misalignment, incorrect calibration may lead to lateral errors: the fire will go to the right or left of the target to be fired. However, for the elevation adjustment, the adjustment of the deviation is of course less important, since such an adjustment is rarely made. The adjustment of the parallax is also not frequent.

Basically, the limitations of the existing lenticular optical elements are clearly related to the elevation angle, which requires continuous adjustment, regardless of the deviation and parallax.

To some extent crossbows suffer from the same problems.

US 2004/088898 describes a solution according to the preamble of claim 1. The lenticular optical element is internally provided with an electronic encoder system for detecting the angular position of the elevation turret. The encoder system is built together with the turntable, i.e. integrated in its interior, which makes the lenticular optical element costly.

Other solutions of the prior art are described in US 2012/186131 and US 2014/115942.

Disclosure of Invention

It is therefore an object of the present invention to provide a ballistic modification device for aiming members of weapons and crossbows, which allows to simply and effectively overcome the limitations of the prior art solutions, i.e. a device which allows to simply and intuitively detect the calibration parameters of an adjustment turret (turret), in particular an elevation turret.

The invention therefore relates to a ballistic correction device for a sighting member (sight chamber) of a (weapon) provided with an elevation-adjusting turntable, as claimed in claim 1.

In particular, the device comprises:

-detection means for detecting the rotation imparted by the shooter to the adjustment ring of the elevation turret, and

display means for displaying shot distances and/or other shot settings (settings, set values) corresponding to the position of the rings.

Advantageously, the device is located outside the aiming member, i.e. the lenticular optical element, with which it is combined, and can be removably mounted on the aiming member as an after-market (retrofit) accessory.

The device according to the invention has a number of advantages.

For the shooter, the device shows the calibration of the turret from the moment the shooter views the device.

One obvious benefit is: the shooter no longer needs to remember the last calibration performed.

Another advantage is that in the step of performing the new calibration, it is no longer necessary to consult the compensation table, but only to read the values displayed on the device when rotating the ring of the turntable. A corresponding and unique calibration value, preferably a value of the return-to-zero distance, i.e. a value of the firing distance, is displayed on the device for each angular position of the ring.

The ballistic modification device according to the invention, provided that it is not integrated in the aiming member at the time of manufacture, as provided in the solutions according to the prior art, as an accessory that can be mounted on the aiming member at another time after sale, allows the advantages described above to be obtained at low cost. In other words, the aiming member is not changed, nor has it to be redesigned, rebuilt or changed: the device according to the invention can be easily mounted on existing aiming members, since the detection means for detecting the rotation of the adjusting ring applied to the elevation turntable by the shooter are also external to the aiming member.

Preferably, the device comprises a control unit interacting with (associated with) the detection means and the display means. Said detection means generating an electrical signal representative of the angular position of the elevation adjustment ring, or of the amplitude of one rotation of the ring; the control unit processes the electrical signal and prepares to display the firing distance or return-to-zero distance corresponding to the angular position of the ring at that time.

For example, the display device may be a display, also a touch screen type display operating as a user interface.

Preferably, the control unit is of the microprocessor type and is programmable. Preferably, the program is arranged to store the angular positions taken by the ring over time, and/or to store the corresponding shot distances and/or other shot parameters. In other words, a log file of data stored over time is stored in the control unit.

Preferably, the apparatus completely replaces the compensation table: the control unit can be programmed to automatically convert the signal coming from the detection means into a visual and/or acoustic message, based on a conversion table stored in the firearm used at the time, said message corresponding uniquely to the shooting distance set by the shooter acting on the ring.

Preferably, the detection means are tracking means comprising a trimmer (trimmer), for example of the potentiometer type, associated with the ring of the elevation turntable, to which trimmer each rotation applied to the ring is also applied in its entirety.

The adjuster is provided with a shaft connected to an elevation adjustment ring by a gear or belt.

In one embodiment, the shaft of the adjuster is keyed with a wheel that contacts the outer surface of the ring when the device is properly mounted on the aiming member and rotates as the ring rotates. In this way, the wheel transmits the same rotations to the axis of the adjuster as those applied to the ring by the shooter.

The runner is preferably provided with a circumferential washer which acts as a pace adjuster (pacesetter) against the outer surface of the ring.

In an alternative embodiment, the shaft of the adjuster is connected to the elevation adjustment turntable by a drive belt. For example, the device comprises a pulley keyed on the elevation adjustment turntable and a pulley keyed on the shaft of the adjuster, a belt connecting the two pulleys together, causing the shaft of the adjuster and the elevation adjustment ring to rotate in a synchronous manner. This solution allows to mount the device at a distance of a few millimetres from the turret of the aiming member, while a drive belt will connect the device to the ring adjusting the turret.

Preferably, the device comprises fastening means, such as a bracket, a ring or the like, for fastening to the aiming member (the lenticular optical element). The fastening means are designed to allow the positioning of the device on the lenticular optical element in a position such that the detection means are in constant contact with the ring of the elevation turret.

In one embodiment, the lenticular optical element includes a connection interface to connect with an external display, such as a smartphone, that is used in place of the display.

In a second embodiment, the invention relates to a kit comprising a targeting member with an elevation adjustment turret and a ballistic modification device with the above-described external assembly.

In a third embodiment, the invention relates to a method for correcting the elevation angle of a firearm, such as a rifle, with an aiming member having an elevation adjustment turret, or a crossbow, according to claim 15.

Optionally, in both described embodiments, the device may comprise one or more attachable and detachable accessories, such as:

a laser pointer (pointer), which helps to align the lenticular optical element,

-a detector of the GPS coordinates,

-a shot detection means for detecting the presence of a shot,

a memory cooperating with the shot detector to store, for example, GPS coordinates corresponding to each shot and the calibration of the lenticular optics at the time of the shot,

an I/O interface, for example with a USB port, for establishing a data connection with other electronic devices, for example computers, for downloading the above data and enabling the analysis of said data at other times, for example by means of satellite maps, for statistical and strategic purposes or to other extents,

-a wireless communication interface to communicate with other inventive devices to ensure that in an area with multiple shooters, one shooter can know in real time the calibration used by another shooter.

The power supply of the device according to the invention is preferably provided by one or more replaceable batteries. Alternatively or additionally, the apparatus comprises a solar panel.

Preferably, the device also allows the storage of calibrations of different types of ammunition, for example, those relating to hunting ammunition and those relating to military ammunition, so that the shooter can easily transit from one calibration to another starting from the moment the shooter changes the type of ammunition fired with the firearm.

Drawings

Further characteristics and advantages of the present invention will better emerge from the following detailed description, which is preferred but not exclusive, and of an embodiment which is given purely by way of illustration and not of limitation, with the aid of the accompanying drawings, in which:

figure 1 is a front elevation view of a first embodiment of the apparatus according to the invention;

figure 2 is a side elevation of the apparatus shown in figure 1;

figure 3 is a front isometric view of the apparatus of figure 1;

FIG. 4 is a top view of the apparatus shown in FIG. 1;

figure 5 is a rear isometric view of the apparatus of figure 1;

figure 6 is an exploded view of the device shown in figure 1;

FIG. 7 is a side view of the device of FIG. 1 mounted on a lensing optic of the rifle;

FIG. 8 is a left perspective view of the device of FIG. 1 mounted on the lensing optics of the rifle;

FIG. 9 is a right perspective view of a portion of the device of FIG. 1 mounted on the lenticular optics of the rifle of FIG. 8;

figure 10 is a schematic view of a second embodiment of the device according to the invention.

Detailed Description

Fig. 1 to 9 show a first embodiment of a device 1 according to the invention, and fig. 10 shows a construction variant 1'.

The device 1 comprises a box-shaped body 2 and corresponding fastening means 3 for fixing to the sighting lenticular optical element, which preferably comprise a ring 2 that can be re-closed by means of bolts on the body of the lenticular optical element.

The box-shaped body 2 houses a screen 4, for example a liquid crystal screen, which displays messages to the user in alphanumeric and/or graphical form. When the device 1 is correctly mounted on the sighting lens optics, the screen remains facing the shooter holding the weapon. For this reason, the side of the screen is defined as the front side of the device 1.

A keyboard 5 is provided on an upper portion of the main body 2 of the apparatus and constitutes an interface allowing a user to control the operation of the apparatus. Alternatively or additionally, the screen 4 is of the touch screen type.

On this side of the body 2 an I/O interface, for example a USB port, is provided for connecting the device 1 to an external electronic device. Alternatively or additionally, the device comprises an I/O interface of wireless type, for example Wi-Fi or bluetooth.

The side of the device 1 opposite the screen 4 is defined as the rear side, which faces the barrel of the weapon when the device 1 is correctly mounted on the sighting lens optics.

On the rear side, the device 1 comprises a tracking mechanism 7, which operates to detect each rotation of the ring applied to the elevation turret by the shooter and to measure the amplitude of each rotation. The mechanism 7 comprises an adjuster 7.1 with angle sensor function, equipped with a shaft (as shown in the figure) keyed with a wheel 7.2. The wheel 7.2 is also provided with an elastic washer 7.3, for example made of rubber, and acting as a cadence regulator.

For example, a suitable material for forming the elastic gasket 7.3 is polyurethane having the following characteristics:

-hardness 90Sh a, measured according to ASTM D-2240 standard;

-100% elongation modulus 8.2MPa, measured according to ISO 37 standard, sampling speed 8.5 mm/s;

-300% elongation modulus 13.8MPa, measured according to ISO 37 standard, sampling speed 8.5 mm/s;

a breaking load of 41MPa, measured according to ISO 37 standard, and a sampling speed of 8.5 mm/s;

-elongation at break 460%, measured according to ISO 37 standard, sampling speed 8.5 mm/s;

-abrasion resistance 34mm/3, measured according to DIN 53516;

tear resistance (sample C)84kN/m, measured according to ISO 34-1 standard;

30% permanent set, measured according to ISO 815 standard, method B, at a temperature of 70 ℃ for 22 hours.

The wheel 7.2 can be rotated clockwise and counter-clockwise. These rotations are applied directly to the adjuster 7.1, which means that the adjuster shaft rotates integrally with the wheel 7.2.

The shaft 7.1.1 of the adjuster 7.1 is clearly visible in fig. 6. Preferably, the regulator 7.1 is of the potentiometer type.

Reference numeral 8 denotes a printed circuit with a microprocessor unit of programmable type which controls all the functions of the device-including the possible connections to other external devices via the above-mentioned I/O interface, and which can be accessed (operated) by the user via the keyboard 5 or the screen 4.

Fig. 7 shows the device 1 mounted on the lenticular optics 9 of the rifle 10. The lens optical element 9 is a telescopic sighting device provided with an elevation angle adjusting turret 11. Reference numeral 12 denotes a ring of the turntable 11 which can be rotated by the shooter in both directions to raise or lower a cross-hair or mark visible to the shooter when viewed through the lenticular optical element itself.

It can be noted that the device 1 is correctly arranged on the lenticular optical element 9 with the tracking mechanism 7 in contact with the ring 12 of the elevation turret 11. The washer 7.3 is attached to the ring 12 and each rotation ("click") imparted to the ring 12 is transmitted to the runner 7.2 with the same amplitude (i.e. without slipping), which then transmits the rotation to the shaft 7.1.1 of the adjuster 7.1.

The adjuster 7.1 is configured to generate an electrical signal in response to rotation applied to the shaft 7.1.1. The electrical signal is processed by the control unit 8 to determine the following parameters:

1) the direction of rotation applied to the wheel 7.2 and thus to the ring 12 of the turntable 11;

2) the magnitude of the same rotation is, for example, expressed in radians.

The control unit 8 comprises a memory, preferably a static memory, in which all detected parameters are stored, e.g. in a log file. In fact, all the rotations applied to the ring 12 are stored in the device 1.

As described below, the preferred calibration for each shooter and/or the calibrated, available characteristics relating to each type of shooting ammunition may be stored in the device 1, 1' as long as the same weapon is used for different purposes by more shooters using different ammunition.

By carefully initializing the device 1-by zeroing the memory and associating it with the ring 12 initially in the zero position-the device 1 keeps track of each adjustment applied to the elevation angle by the ring 12.

The results are shown in fig. 8. At which point a message 13 providing calibration information for the turntable 11 is projected onto the screen 4. In the example shown, the message is "537 mt", i.e. 537 meters. This means that the elevation angle is adjusted to the distance of the shot to 537 meters. In view of the above, if the shooter wants to make a new shot to shoot at a different distance, for example 400 m, the shooter must act on the ring 12 of the turntable 11 to raise the cross-hairs or the markings of the lenticular optical element 9.

As described above, conventionally, the shooter relies on his own memory to remember the last adjustment to be applied to the turntable 11 and on the printed compensation table. Thanks to the device 1, the adjustment finally made is made available to the shooter on the memory and display 4 of the device itself. By acting again on the ring 12, the shooter will see that the numbers on the display 4 change accordingly until the desired distance of 400 meters is reached.

The compensation tables of the rifle 10 are stored in the control unit 8, so that the shooter no longer has to insert data on a paper watch, which is not easy to look up in hunting, but he will immediately see on the display 4 the value of the shooting distance corresponding to the adjustment applied to the ring 12 at the time.

As mentioned above, the device 1 optionally comprises an I/O interface 14 for connection with external electronic devices. In fig. 9, in addition to the USB port, an I/O interface 14 of the wireless type, in particular Wi-Fi, or alternatively bluetooth or radio, is schematically shown. Thanks to this interface, the device 1 can also interact, at hunting, with other devices 1 of the same type, in order to share between hunters the information about the shooting parameters selected by each hunter at any time, or for connection to a computer for statistical analysis of the data stored in the device, which analysis is helpful to learn and improve the quality of each shooter.

Reference numeral 15 schematically denotes a GPS module for detecting the coordinates of the device 1. The coordinates are useful in analyzing the collected data and communicating their location to other hunters. For example, the GPS module 15 collects the coordinates, which the interface 14 transmits to a device registered in the private network, the other hunter can see on his smartphone the position detected by the module 15.

Sharing information about the location of each hunter also helps to avoid accidents.

At the end of the hunting trip, hunters can see each shooter's movements and course over time on the satellite map.

The device 1 shown in fig. 1-9 is external to the rifle 10 and the corresponding lenticular optics 9. Fig. 10 shows an embodiment 1 'in which the reference 7.2' indicates a pulley and 7.3 'indicates a conveyor belt functionally integrated with the pulley 7.2' and the loop 12 of the elevation tower. The drive belt 7.3', which may be smooth or toothed, transmits rotation from the ring 12 to the shaft 7.2' of the regulator in a synchronous manner (i.e. without slipping), the rotation imparted to the ring 12 by the shooter being constantly transmitted to the pulley 7.2 '. If necessary, the device 1' also comprises another pulley 12' which can be keyed or fitted onto the ring 12 to guide the belt 7.3 '.

In embodiment 1', the pulley 7.2' does not directly contact the ring 12. The drive belt 7.3 'allows the installation of the device 1' at a distance, for example 2mm or 10mm, from the turntable 11, as required.

For example, the drive belt 7.3' may be made of the same material as described for the washer 7.3.

It is clear that the device 1' can be fitted with the accessories associated with the device 1 described above.

Preferably, the devices 1 and 1' are provided with means for detecting the shot (not shown), such as optical or magnetic means for detecting the movement of the rifle hammer. In this way, it is possible to store the shooting parameters selected by the shooter for each shot: elevation adjustment, GPS position, accurate shooting time.

The invention is also applicable to the aiming member of a crossbow.