DEVICE FOR ARRANGING AN ACCESSORY ON A FIREARM

Abstract

A device for arranging an accessory on a firearm, in particular a handgun, is provided, wherein the device has a housing for receiving the accessory in the housing, wherein the housing can be fastened to the firearm, wherein the housing has a first portion with a front end wall and with a rear end wall at a distance from the front end wall, the housing has a second portion, which protrudes axially at the rear end wall of the first portion, the second portion has a fastening device for fastening the housing to the firearm, and the housing has a substantially L-shaped basic form. A firearm with a device for arranging an accessory on a firearm that is arranged on it or can be arranged on it is also provided.

Claims

1. A device (1) for arranging an accessory on a firearm, in particular, a handgun, wherein the device comprises a housing (10) for receiving the accessory within the housing, wherein the housing (10) can be attached to the firearm, and wherein the housing (10) has a substantially L-shaped basic shape, the housing (10) has a first portion (10a) with a front end wall (VE) and with a rear end wall (HE) spaced apart from the front end wall (VE), the housing (10) has a second portion (10b), which protrudes at the rear end wall (HE) of the first portion (10a) axially, one leg of the L-shaped basic shape is formed by the first portion (10a) and the other leg of the L-shaped basic shape is formed by the second portion (10b), wherein the two portions (10a, 10b) are arranged substantially perpendicular with respect to each other, and wherein the rear end wall (HE) of the first portion (10a) is substantially perpendicular to the top side (O2) of the second portion (10b), and the second portion (10b) has fastening means (11a; 11b; 12) at the top side (O2) for fastening the housing (10) to the firearm.

2. The device of claim 1, wherein the second portion (10b) of the housing (10) extends in parallel to a longitudinal axis (LA) of the housing (10), and the fastening means comprises two fastening rails (11a; 11b), which extend spaced apart from each other and parallel to the longitudinal axis (LA) of the housing (10), wherein the inner profile (I) formed by the fastening rails (11a; 11b) and the top side (O2) of the second portion (10b) extending between the two fastening rails (11a; 11b) substantially corresponds to an outer profile of a mounting rail of the firearm, in order to be able to bring the second portion (10b) into engagement with the mounting rail, in order to fix the housing (10) to the firearm releasably.

3. The device of claim 2, wherein the inner profile (I) corresponds to an outer profile of a mounting rail provided at the underside of the barrel (5) of the firearm.

4. The device of claim 1, wherein the height (h1) of the part (10c) of the first portion (10a) protruding beyond the top side (O2) of the second portion (10b) is selected such that this part (10c), in the state of the housing (10) fixed to the firearm, at least partially is arranged axially in front of the barrel (5) of the firearm, and at least partially protrudes into an imaginary extension of the barrel.

5. The device of claim 4, wherein the accessory comprises a light-emitting source, in particular, a laser-light-emitting diode, which is arranged within the housing (10), wherein the front end wall (VE) of the first portion (10a) has a first opening (21) in the area of the protruding part (10c), through which a light beam, in particular, a laser light beam, of the light-emitting source can exit from the housing (10).

6. The device of claim 5, wherein the position of the first opening (21) in the front end wall (VE) is selected such that the opening (21), in the mounted state of the device, is located in front of the barrel (5) of the firearm, and that the distance (d1) between the center of the first opening (21) and the bore axis (SA) of the barrel (5) is at minimum, preferably, smaller than 15 mm, particularly preferred smaller than 12 mm, more particularly preferred smaller than 9 mm.

7. The device of claim 1, wherein the accessory comprises a tactical light (50), wherein the light source for the tactical light is arranged within the housing (10), and wherein the front end wall (VE) of the first portion (10a) has a second opening (22), through which the light of the light source for the tactical light can exit from the housing, or comprises an imaging means (60), in particular, a video camera or webcam, wherein the imaging means is arranged within the housing (10), and wherein the front end wall (VE) of the first portion (10a) has a third opening (23), through which the light from the outside can reach the optics of the imaging means, or comprises a communications interface, in particular, a wireless communications interface being adapted to establish a communications connection to a mobile terminal, in particular, a smart phone, and/or to a mobile network, or comprises a recording means, or comprises means for determining the geographical position of the device (1), in particular a GPS module, wherein an energy storage, preferably an accumulator, is arranged within the housing (10), preferably in the second portion (10b) of the housing (10), which is coupled electrically to the accessory in order to supply the accessory with electrical energy.

8. The device of claim 7, wherein the energy storage can be charged wirelessly, preferably, inductively, or a connector is provided at the housing (10) in order to charge the energy storage by wire.

9. The device of claim 1, wherein a means is provided within or at the housing (10) for automatic activation of the accessory arranged within the housing, wherein the means for automatic activation comprises: a switching means cooperating with a holster of the firearm such that upon pulling the firearm from the holster, the switching means can be activated, wherein the accessory is activated by the activated switching means, or a position sensor, which is adapted to activate and/or to deactivate the accessory depending on the position and/or orientation of the housing (10).

10. The device of claim 1, wherein the housing or the first portion (10a) and the second portion (10b) are formed in one piece.

11. The device of claim 1, wherein a locking means (12) is provided at the second portion (10b) of the housing (10) in order to lock the housing on the weapon.

12. The device of claim 1, wherein the locking means (12) can be brought into engagement with recesses provided at the mounting rail of the weapon.

13. The device of claim 11, wherein the locking means (12) comprises a locking rocker (13) being arranged pivotably about a pivot axis (14) at the second portion (10b) of the housing (10), and which can be brought from a locking position into a release position.

14. The device of claim 13, wherein the locking rocker (13) is aligned substantially in parallel to the longitudinal axis (LA) of the housing (10), and, in the state of the device (1) mounted on the weapon, can be brought into engagement with the trigger of the weapon in order to lock the device on the weapon.

15. The device of claim 11, wherein a spring member (15) is assigned to the locking means (12), the spring force of which retaining the locking means in the locking position, wherein the locking means can be brought into the release position against the spring force.

16. A firearm, in particular a handgun, with a device (1) according to claim 1 arranged thereon.

17. The firearm of claim 16, wherein the device (1) is fixed or can be fixed to a mounting rail arranged below a barrel (5) of the firearm.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Details and features of the invention can be derived from the following description in connection with the drawing, in which:

[0061] FIG. 1 shows a handgun with a tactical light arranged thereon according to prior art;

[0062] FIG. 2 shows the front end of a handgun with a device according to the disclosure arranged thereon;

[0063] FIG. 3 shows the device for arranging accessories on a firearm in a perspective view;

[0064] FIGS. 4A-C show the device in a side view, in a front view, and in a rear view;

[0065] FIG. 5 shows the device in a perspective view of diagonally from the bottom;

[0066] FIG. 6 shows a section of the device in a perspective view;

[0067] FIG. 7 shows a perspective view of a device according to the disclosure with a detailed view of the profile of the second portion of the housing;

[0068] FIG. 8 shows an embodiment of the locking means; and

[0069] FIGS. 9A-C show an alternative embodiment of a locking means.

DETAILED DESCRIPTION

[0070] The device for arranging an accessory on a firearm described below has the advantage that several accessories can be fixed to the weapon at the same time. A further advantage is that the inventive configuration of the housing of the device and the inventive arrangement of the laser sight within the housing of the device substantially improves the accuracy of the laser sight at different firing ranges. A further advantage is that the device may be fixed or mounted and dismounted in a particularly simple, secure and fast manner. Further, additional application areas of the firearm are opened by the device and the weapon can be used for different application scenarios, respectively, without having to replace the accessory means for this.

[0071] FIG. 2 shows a device for arranging an accessory on a firearm which is fixed to a barrel of the firearm. In FIG. 2, only the front portion of the barrel 5 of the weapon is shown, wherein here, the term “barrel” means the barrel forming the barrel bore 6 as well as the breechblock and the front portion of the grip piece.

[0072] The device comprises a housing 10 having a first portion 10a and a second portion 10b. The housing has a substantially L-shaped basic shape, wherein one leg of the L-shaped basic shape is formed by the first portion 10a, and the other leg by the second portion 10be of the housing. Both portions 10a, 10b, thereby, are arranged perpendicular with respect to each other, and a substantially right angle is formed by the two sections 10a, 10b.

[0073] The second section 10b of the housing 10 comprises fastening means in order to fix the housing to the barrel 5. Preferably, the fastening means are configured such that the housing may be fixed to a mounting rail provided at the underside of the barrel 5. The mounting of the device on the weapon advantageously results from fitting the housing 10 onto the mounting rail of the barrel 5.

[0074] By means of the L-shaped configuration of the housing 10, after mounting, the first portion 10a of the housing 10 is arranged axially in front of the barrel 5, i.e., the part of the first portion 10a protruding upwards at the second portion 10b is located axially in front of the barrel 5, and protrudes into an imaginary extension of the barrel. Thereby, a first opening 21, through which the light of a laser sight can exit from the housing 10, also may be provided axially in front of the barrel 5 in the first portion 10a of the housing 10 such that the opening 21, after the attachment of the housing 10 to the weapon, is located directly in front of the barrel, while according to the prior art, the outlet opening for the laser sight always is arranged below the barrel. By the inventive configuration of the housing 10 and the inventive arrangement of the first opening 21 in the first portion 10a of the housing 10, the distance d1 between the bore axis SA of the barrel bore 6 and the optical center axis OA of the laser sight can be minimized. The optical axis OA of the laser sight, therefore, may be moved close to the bore axis SA of the barrel bore 6.

[0075] The distance d1 between the two axes SA, OA, thereby, may be reduced from the conventional 70 mm according to the prior art to approximately 15 mm, preferably, to about 12 mm, particularly preferred to about 8 mm or less. The accuracy of the laser sight thus may be substantially improved at different firing ranges.

[0076] As can be seen in FIG. 2, the height of the first portion 10a of the housing 10 is selected such that the part of the first portion 10a protruding upwards beyond the second portion 10b also is arranged axially in front of the muzzle of the weapon, i.e., protrudes into the imaginary extension of the barrel. This is possible, because a shot channel 30 is formed in the first portion 10a of the housing 10, which extends coaxially with respect to the barrel bore 6 of the weapon. Here, the shot channel only forms a through hole for the bullet. Thereby, a close-contact shot is also possible with the device being mounted on the weapon without the accessory means accommodated within the housing 10 affecting the shot.

[0077] The first portion 10a and the second portion 10b of the housing 10 are formed as one piece, that means, the two portions 10a, 10b together form a one-piece housing 10. As far as access to the interior of the housing 10 is desired, for example, for the purpose of inspection and/or maintenance, closable maintenance openings may be provided at the housing 10.

[0078] FIG. 3 shows a device 1 in a perspective view diagonally from above.

[0079] Here, the top side O1 of the first section 10a and the top side O2 of the second section 10b can be seen in detail.

[0080] The second portion 10b has fastening means at the top side O2, which here are formed as a first fastening rail 11a and a second fastening rail 11b. The fastening rails 11a, 11b are configured such that they correspond to an outer profile of a mounting rail of the weapon so that the housing 10 may be pushed onto the mounting rail of the weapon.

[0081] The second portion 10b of the housing 10 may comprise a locking means 12 by means of which the housing 10 pushed onto the mounting rail of the weapon may be locked on the weapon in order to prevent an inadvertent release of the housing from the weapon. An embodiment of the locking means is described with reference to FIG. 8.

[0082] The first section 10a of the housing has a front end wall VE and a rear end wall HE, wherein for the embodiment of the inventive device shown here, these two end walls are substantially arranged perpendicular with respect to each other. However, it is also possible to provide the front end wall VE inclined at a certain angle with respect to the rear end wall HE.

[0083] The front end wall VE may be formed by a cover plate or by a trough-shaped cover 90. The cover is made from a particularly hard material, as hardened steel or ceramics, and may be used for smashing windows, for example, vehicle window panes.

[0084] Additionally, mandrels may be arranged at the front end wall VE or at the cover 90, which may also be made from a particularly hard material. The mandrels may have different or arbitrary shapes. Preferably, they converge in an acute angle in axial direction with respect to the housing.

[0085] The second portion 10b of the housing 10 is arranged at a right angle with respect to the rear end wall HE of the first portion 10a of the housing 10 such that the top side O2 of the second portion 10b and the rear end wall HE of the first portion 10a substantially are perpendicular with respect to each other. An entrance opening of the shot channel 30 is provided in the rear end wall HE of the first portion 10a. At the opposing end wall VE, a corresponding exit opening of the shot channel 30 is provided, wherein the shot channel 30 substantially has the diameter of the barrel bore of the firearm, and extends coaxially with respect to the barrel bore of the firearm.

[0086] The height h1 of the part 10c of the first portion 10a protruding beyond the top side O2 of the second portion 10b is selected such that the surface O1 of the first portion 10a, in a mounted state of the device 1, substantially extends to the upper edge of the barrel or the breechblock of the weapon. Preferably, the outer contour of the part 10c of the first portion 10a protruding beyond the top side O2 of the second portion 10b is selected such that it corresponds to the outer contour of the barrel or of the breechblock of the weapon. The front sight, the rear sight, and the edge sight of the weapon, thus, may be further used and do not have to be adapted to the contour of the housing.

[0087] FIG. 4A shows the device in a front view, FIG. 4B shows the device according in a side view, and FIG. 4C shows the device in a rearview.

[0088] Here, further openings 22, 23 provided in the first section 10a or at the front end wall VE of the housing 10 can be seen, wherein the second opening 22 is an exit opening for a tactical light, and wherein the third opening 23 is the opening for an imaging means arranged within the housing 10, through which the light may reach the optical elements of the imaging means.

[0089] Also, in FIG. 4A the distance d1 between the center of the opening 21 of the laser sight and the bore axis of the barrel is shown. As can be seen in FIG. 4A, the opening 21 for the laser sight may be moved further upwards in order to reduce the distance d1 even further. In particular, it is possible to move the opening 21 that far upwards until the distance between the barrel bore and the opening 21 is approximately zero.

[0090] In FIG. 4B, also the substantially L-shaped basic shape of the housing 10 can be seen particularly well.

[0091] The locking means 12 and the second portion 10b of the housing 10 is configured such that it may be pushed or moved downwards so as to release the locking of the housing on the weapon.

[0092] FIG. 5 shows the device in a perspective view diagonally from below. In this view, the mounting rail 70 provided at the underside U of the housing 10 can be seen. The mounting rail may be used in order to fix further accessories to the underside U of the housing 10. For example, a video camera may be fixed at the underside of the housing 10, as far as no video camera is provided within the housing 10.

[0093] Electrical contacts may be provided at the underside U of the housing 10 or at the mounting rail 70, which are electrically connected to an accumulator accommodated within the housing 10. Via these electrical contacts corresponding to electrical contacts of further accessories attached to the mounting rail 70, electrical components of the further accessories may be supplied with electrical energy such that no own power supply has to be provided in the further electrical accessories, thus, reducing the weight of the further accessories.

[0094] Besides the laser sight, a communications interface, in particular, a wireless communications interface may be provided within the housing 10 as further accessories. This communications interface may be adapted to establish a communications connection to a smartphone of the shooter or to a mobile network. Thereby, data transmission between electrical components (accessories) and a portable terminal (for example, a smartphone) may be carried out. By means of this data transmission, also control signals or control commands may be transmitted from a terminal to the accessory means within the housing 10 in order to, for example, control certain accessory means remotely.

[0095] The electrical contacts provided at the underside U of the housing 10 or at the mounting rail 70 may also be used for data transmission between an accessory means fixed to the mounting rail 70 and the housing 10. In combination with the communications interface, thus, data provided from the accessory means arranged on the mounting rail 70 may be transmitted to a remote terminal or data, for example, control data, may be transmitted from a remote terminal to this accessory means.

[0096] The mounting rail 70 shown in FIG. 5 is provided only at the underside of the second portion 10b of the housing 10. Alternatively or additionally, a mounting rail may also be provided at the underside of the first portion 10a of the housing 10.

[0097] FIG. 6 shows a longitudinal section of a device in a perspective view.

[0098] In the first section 10a, an imaging means 60, for example, a video camera or a webcam may be arranged. The imaging means 60 may be coupled to the communications interface mentioned above in order to transmit, for example, live images to a remote terminal. In addition to the imaging means 60, also a recording means may be provided in order to be able to also transmit audio data together with the image data to a remote terminal. Thus, the use of the weapon may be monitored by third parties, critical situations may be analyzed and assessed in real time, and corresponding measures may be taken, if needed. The transmitted image and audio data, moreover, may be recorded for documentation purposes. For recording the image and audio data, a storage means may also be provided within the housing 10, which is advantageous in case no communications connection can be established to an external or remote apparatus.

[0099] Further, a tactical light may be provided in the first portion 10a of the housing, which may be used for illuminating the shooting area.

[0100] The light-emitting laser diode of the laser sight may be arranged directly behind the opening 21. Alternatively, the laser diode may also be arranged at another position within the housing 10, and the light of the laser diode may be deflected, for example, via deflection mirrors, to the opening 21.

[0101] Further, means for determining the geographical location of the housing 10 may be provided within the housing 10. Preferably, a GPS module is provided for this. The location data determined by the GPS module may be transmitted to an external terminal together with the image and audio data via the communications interface.

[0102] Further, a position or motion sensor may be arranged within the housing 10. The position or motion sensor may be provided in order to activate or to deactivate accessory means arranged within the housing 10. For example, it may be provided for the accessory means only being activated, if the longitudinal axis LA of the housing 10 is inclined with respect to the horizontal within a certain angle range. Thus, for example, the accessory may be de-activated, if the weapon is directed downwards to the ground or to the sky, and the accessory means may be activated, if the weapon is directed substantially horizontally to the front. Thereby, energy for the operation of the accessory means can be saved. According to an embodiment of the invention, it may be provided for only selected accessory means being able to be activated or deactivated by means of the position or motion sensor while the other accessory means have to be activated or deactivated manually.

[0103] For activating or deactivating certain or all accessory means, a switching means cooperating with a holster of the firearm not shown here may be provided within the housing 10. The switching means and the holster may be configured such that upon pulling the firearm from the holster, the switching means is activated, this, in turn, activating selected or all accessory means. Upon inserting the firearm into the holster, the switch then is deactivated.

[0104] Moreover, an energy supply, in particular, accumulators 80, may be provided within the housing 10, which preferably are arranged in the second portion 10b of the housing 10. Thereby, an optimal wage distribution of the device is achieved. Preferably, the energy storage or the accumulators 80 are charged wirelessly, preferably inductively. According to an alternative embodiment, a connector may be provided at the housing in order to be able to charge the energy storage by wires.

[0105] FIG. 7 shows the device according in a perspective view, wherein the second portion 10b is shown in cross-section.

[0106] The inner profile formed by the first fastening rail 11a, by the second fastening rail 11b, and by the top side O2 of the second portion 10b of the housing 10 extending between the two fastening rails 11a, 11b is formed substantially U-shaped, and is adapted to the outer profile of the mounting rail of the firearm. The two fastening rails 11a, 11b comprise recesses or grooves extending in longitudinal direction, by means of which the projections provided at the mounting rail of the weapon may be brought into engagement. The housing 10 may thus be fitted onto the mounting rail of the weapon from the front, and may be locked by means of the locking means 12 on the weapon, if needed.

[0107] FIG. 8 shows an embodiment of a locking means in cross-section. The locking means, here, comprise a locking pin or a locking rocker 13, which here is provided at the first fastening rail 11a. A further locking pin or a further locking rocker 13 may be provided at the second fastening rail 11b. Several locking pins or locking rockers 13 may be provided at the two fastening rails 11a, 11b, respectively. The locking rocker 13 is supported pivotably about a pivot axis or rotation axis 14. Moreover, a spring member 15 is assigned to the locking pin or the locking rocker 13, wherein the spring force brings the locking rocker 13 into a locking position or retains it in the locking position. The locking pin or the locking rocker may be brought into a release position against the spring force (by pushing, as illustrated by the compressive force F), in which the housing may be drawn from the mounting rail of the firearm.

[0108] In the locking position, an end of the rocker 13 protrudes from the inner side wall of the fastening rail 11a and engages with a recess at the mounting rail of the firearm. The recess may be formed by gaps formed by bars spaced apart from and parallel to each other extending obliquely with respect to the mounting rail.

[0109] In FIG. 8, the rocker 13 is aligned perpendicular with respect to the longitudinal axis LA of the housing 10. Alternatively, the rocker 13 may also be aligned in parallel to the longitudinal axis of the housing 10, as shown in FIG. 9.

[0110] FIGS. 9A-C show an alternative embodiment of a locking means 12 of a device 1, which is arranged at or fastened to the weapon, wherein in FIG. 9A, the locking means is in a locking position, in FIG. 9B the locking means is in a release position, and in FIG. 9C, the locking means is shown in a side view.

[0111] The locking means 12, here, consists of at least one locking rocker 13, which is arranged substantially parallel to the longitudinal axis LA of the housing 10. The locking rocker 13, here, is also supported pivotably about a pivot axis 14 at the housing 10, i.e., at the second portion 10b of the housing 10 such that the locking rocker 13 can be brought from a locking position (as shown in FIG. 9A) into a release position (as shown in FIG. 9B). In the release position, the device 1 can be detached from the weapon.

[0112] The locking rocker 13 is arranged at the rear end 16 of the housing portion 10b, and namely such that a portion of the locking rocker 13 protrudes beyond the rear end 16 of the housing portion 10b. By means of the portion protruding beyond the rear end 16 of the housing portion 10b, the device 1 is locked at the weapon by being able to bring this portion into engagement with the trigger 7 of the weapon. At the portion protruding beyond the rear end 16 of the housing portion 10b, a pin 17 is provided, which, in the locking state, engages with the trigger 7, and thus prevents an autonomous or inadvertent releasing of the device 1 from the weapon.

[0113] The side of the pin 17 facing the trigger 7 comprises a surface 17a slanting downwards inwardly. That means the angle α included by the surface 17a and the longitudinal axis LA2 of the locking rocker 13 is smaller than 90°, preferably smaller than 75°, particularly preferred about 40°. Thereby, the slanted surface 17a, during fitting of the device to the mounting rail of the weapon, abuts against the trigger 7. The trigger 7 then pushes the locking rocker 13 outwards, and the surface 17a slides past the trigger 7. After the complete fitting of the device onto the mounting rail of the weapon, the portion of the locking rocker 13 protruding beyond the rear end 16 of the housing portion 10b tilts inwards again. Then, the locking rocker 13 is in the locking position. The tilting inwards may be effected by a spring member, which is assigned to the locking rocker 13.

[0114] In order to bring the locking rocker 13 into the release position, the portion not protruding beyond the rear end of the housing portion 10b only has to be pushed inwards. Then, the portion projecting beyond the rear end of the housing 10b is pivoted outwards about the pivot axis 14 such that the pin 17 no longer engages with the trigger 7. The device 1 may then be simply drawn from the weapon.

[0115] Compared to the embodiments shown in FIG. 7 and FIG. 8, the embodiment of the locking means 12 shown with reference to FIGS. 9A-C has the advantage that no portions of the locking means protruding laterally beyond the housing 10 are present, while the locking means 12 is in the locking position.

REFERENCE NUMERALS

[0116] 1 device for arranging an accessory on a firearm [0117] 5 barrel of the weapon (including breechblock) [0118] 6 barrel bore [0119] 7 trigger [0120] 10 housing of the device 1 [0121] 10a first portion of the housing 10 [0122] 10b second portion of the housing 10 [0123] 10c part of the first portion 10a projecting beyond the top side O2 of the second portion 10b [0124] 11a first fastening rail of the fastening means [0125] 11b second fastening rail of the fastening means [0126] 12 locking means of the fastening means [0127] 13 locking pin or locking rocker of the fastening means 12 [0128] 14 rotation or pivot axis of the locking rocker 13 [0129] 15 spring member of the locking means 12 [0130] 16 rear end of the second portion 10b of the housing 10 [0131] 17 pin [0132] 17a slanted surface of the pin 17 [0133] 21 (first) opening for the laser sight [0134] 22 (second) opening for tactical light [0135] 23 (third) opening for imaging means 60 [0136] 30 shot channel within housing 10 or in the first portion 10a of the housing 10 [0137] 50 tactical light [0138] 60 imaging means, e.g., video camera/webcam [0139] 70 mounting rail at the underside U of the housing 10 [0140] 80 energy storage, e.g., accumulators [0141] 90 cover plate at the front end wall VE [0142] d1 distance between the center of the opening 21 and the board axis SA of the barrel 5 [0143] F compressive force (for releasing the locking means) [0144] h1 height of the protruding part 10c [0145] HE rear end wall of the first portion 10a [0146] I inner profile [0147] LA longitudinal axis of the device 1 or the housing 10 [0148] LA2 longitudinal axis of the locking rocker 13 [0149] OA (optical) censure axis of the laser sight [0150] O1 top side of the first portion 10 eight [0151] O2 top side of the second portion 10be [0152] SA bore axis of the barrel 5 [0153] VA front end wall of the first portion 10a [0154] U underside of the housing 10 [0155] α angle between the longitudinal axis LA2 and the slanted surface 17a