Trigger group of a crossbow based on a retention groove

Abstract

Trigger group for a crossbow, characterized in that it consists of a retaining groove (B), a lock of the retaining groove (C) which is movable along the direction of fire, a lifter (D), a mechanical sequence control and a trigger (J).

Description

The basic construction of an armbrus and similar apparatus such as harpoons is well known to store mechanical energy to accelerate projectiles therewith. These may be arrows, bolts, balls, and so forth.The energy for accelerating the projectile can be stored by sheets of a wide variety of types and of different materials.Energy storage is also possible by springs, rubber trains, etc.Usually, the energy is transmitted to the projectile by a tendon, which is locked in a restraining device or a trigger mechanism until the shot.Above all, in simpler armbras, a retaining groove is used as the retaining device / extraction mechanism, a simple depression from which the tendon is pushed out by an extraction mechanism. This type of pull-off mechanism is usually referred to as an edge lifter.The principle of such a restraining device / withdrawal mechanism has already been used in the anti-china of Han dynasty in repeating arm breasts such as the zhugenu.This has already been described 1903 in the book "Ralph Payne-Gallwey 'The Crossbow' Longman's, Green & Co. London".Historical patents using a retaining groove to lock the tendon are, for example:US-0224254-A of 1880, US-1089713-A of 1940, US-2278535-A of 1942 and US-2609810-A of 1952.Usually, in this type of retaining device there is no or only insufficient protection against an undesired firing.Since the tensioned chord is not secured in the retaining groove, but usually only the expelling trigger is protected against undesired actuation.Thus, the mechanical actions against the armbrus or the tensioned tendon can lead to a release of the tensioned tendon from the retaining groove and thus to an undesired firing. This poses a safety problem in handling these armbrushes.The invention solves this problem by a lock which is mounted movably along the firing direction and which closes the retaining groove.The tensioned tendon is secured in the retaining groove by a fastener running along the weft direction, this fastener having toothing.The tendon is lifted / pushed out of the retaining groove by a lifter; the retaining groove also has toothing.Both elements are mechanically connected to a mechanical sequence control.This consists of an outer housing and an inner disc, both of which are provided with mutually engaging recesses or indentations. The housing and the disk are mounted in a rotating manner.The combination of bulge and indentation can be configured as follows.Housing with bulge and disc with indentation or housing with indentation and disc with bulge.The clearance between the flanks of the indentation and the bulge enables a time-offset movement of the closure of the retaining groove and of the lifter.The disk additionally has a partial toothed ring.The housing has a revolving outer toothed ring, which can also be omitted depending on the configuration of the entire draw group.By rotating the housing of the sequence control, the triggering mechanism is activated; this can be achieved by various methods.Possibilities for this are, for example:A lever mounted directly on the housing serves as a trigger.A rack on which such a trigger is mounted and which drives the housing in rotation via a linear movement.A connection via a toothed belt or a chain to another rotating object connected to a trigger lever.The connection with the closure of the retaining groove and the mechanical sequence control is also possible in various ways; gears, toothed racks, toothed belts and chains can serve for this purpose, for example.The retaining groove, the closure of the retaining groove, the lifter, the mechanical sequence control and a drive form a trigger group.The retraction of the trigger group takes place via the respective drive, for example by means of spring force such as compression springs, tension springs, torsion springs, etc.The modularity of the trigger group allows a flexible arrangement of the individual parts and thus in the design of the entire cantilever beam and is an essential part of the invention.Functioning of the Mechanical Sequence Control:Based on an example arrangement of the individual components of the closure group, as shown in FIG. 01.When the housing of the mechanical sequence control (E) is set in rotation, the housing transmits it via a gearwheel (H) to the closure (C) of the retaining groove (B) of the armrest body (A).This begins to release it. Up to a point at which the inner bulge of the housing (E) over the indentation of the disk (F) also drives the latter into rotation. The disc transmits the movement via its partial gear rim to a further gear wheel (G) which starts to move the lifter (D).Until the lifter has lifted the chord out of the retaining groove (B).The return of the lifter (D) is effected by contact of the opposite flanks of the bulges or indentations of the housing (E) and disc (F).Examples of possible arrangements of the individual components and drive types:In Figure 05, a lever has been mounted directly on the housing of the scheduler to drive it. In this arrangement, the components are close and compact to each other.In FIG. 06, the housing of the sequence control is driven via a toothed rack on which a lever is located. This makes it possible to move the trigger of the armbrus forward, similarly to a bullpup gun, and thus to shorten the overall length of the armbrus.In Figure 07, the sequence control has been moved in front of the retaining groove in order to make room behind it for other armbrus parts.The housing of the sequence control is driven via a toothed rack which rests here from above on the housing in order to ensure the correct direction of rotation when the trigger is actuated. The distance thus increased for driving the securing of the retaining groove is bridged by a toothed belt.In FIG. 08, the sequence control is located before the retaining groove as in FIG. 07. The difference was that the trigger was moved forward to allow a "bullpup" like design of the armbrus.Referring now to FIG. 09, there is shown a bullpup-like face layout in which the outer sprocket of the mechanical sequencer housing is omitted.Since the connection between the drive and the sequence control and between the sequence control and the closure of the retaining groove is effected by toothed belts.Summary:The invention solves the existing safety problem of an undesired release of a shot in armbrasks with a restraint system / trigger group which is based on a restraint groove. By closing the retaining groove by a securing means / latch.The interaction of securing the retaining groove and the lifter, which lifts a tensioned chord out of the same, is controlled by a rotationally mounted mechanical sequence control.The drive of the mechanical sequence control can be designed flexibly by various mechanical solutions.Likewise, the connection between the mechanical sequence control and the securing of the retaining groove and the lifter of the retaining groove is flexibly possible by various mechanical solutions.This flexibility makes it possible to freely arrange individual components as far as possible. This is to flexibly adapt the structural requirements of individual arm breasts.This flexibility is an essential part of the invention.List of reference numbers:A Armbrus body B Retaining groove C Closure of retaining groove D Lifter E Mechanical sequence control disk F Mechanical sequence control disk G Gear for connection between sequence control disk (F) and lifter (D). Or, respectively, and. Gear for driving the lifter (D) H gear between the housing of the sequence control (E) and the closure of the retaining groove (C). Or, respectively, and. Gear wheel for driving the closure of the retaining groove (C) J shutter K toothed rack for driving the housing of the mechanical sequence control (E) L toothed belt for connection between the housing of the sequence control (E) and the gear wheel for driving the closure of the retaining groove (H) M toothed belt for connection between the housing of the sequence control (E) and the gear wheel (P) for maintaining the correct rotational direction of the housing of the sequence control (E) P gear wheel for maintaining the correct rotational direction of the housing of the sequence control (E) Q rotary mounted shutter with toothed rimDescription of the Drawings:FIG. 01 (Z 01) shows an example arrangement of the individual components of the withdrawal group. With open and closed control housings.FIG. 02 (Z02) is a detailed drawing for the functioning of the mechanical sequence control in the idle state.FIG. 03 (Z03) is a detailed drawing of the functioning of the mechanical sequence control after the retaining groove has been released and the lifting process has started.FIG. 04 (Z04) is a detailed drawing of the mode of operation of the mechanical sequence control after the firing has been released.FIG. 05 (Z05) shows a possible arrangement of the components of the draw-off group.FIG. 06 (Z06) shows a possible arrangement of the components of the draw-off group.FIG. 07 (Z07) shows a possible arrangement of the components of the draw-off group.FIG. 08 (Z08) shows a possible arrangement of the components of the draw group.FIG. 09 (Z09) shows a possible arrangement of the components of the extraction group.References included in the specificationThis list of documents cited by the applicant has been produced in an automated manner and is only included for the better information of the reader. The list is not part of the German patent application or utility model application. The DPMA does not take any adhesion for any faults or omissions.Patent Literature citedUS 0224254-A

[0008] US-1089713-A

[0008] US-2278535-A

[0008] US-2609810-A

[0008] Cited Non-Patent Literature1903 In the book "Ralph Pay-Gallwey 'The Crossbow' Longman's, Green & Co. London

[0007]

Claims

Trigger group for an armbrus, characterized in that it consists of a retaining groove (B), a lock of the retaining groove (C) mounted movably along the weft direction, a lifter (D), a mechanical sequence control and a trigger (J).Mechanical sequence control for a group of withdrawals of an armbrus according to claim 1, characterised in thatthe latter consists of a rotatably mounted housing (E) and a rotatably mounted disc (F).Housing of a mechanical sequence control (E) according to Claim 2, characterized in thatthe latter has an inner indentation or bulge and an outer toothed rim. This serves to drive the closure of the retaining groove (C) of the extraction group. Depending on the configuration of the draw-off group, this can also be omitted.Disc (F) of a mechanical sequence control according to Claim 2, characterized in thatthe latter has an indentation or bulge and a partial toothed rim. The partial toothed rim serves to drive the lifter (D) of the draw-off group.Method of functioning of the mechanical sequence control of a group of triggers of an armbrus according to Claims 1 to 4, characterized bythe interaction of the housing (E) and the disc (F) of the mechanical sequence control. As well as the time-offset drive of the closure of the retaining groove (C) and the lifter (D) of the trigger group, via the contact of the flanks of the indentation and bulge of the housing (E) and of the disk (F) of the mechanical sequence control.Drive of the mechanical sequence control of the trigger group according to Claim 1, characterized bythe direct attachment of a trigger (J) to the housing of the sequence control (E).Drive of the mechanical sequence control of the discharge group according to Claim 1, characterized bya toothed rack (K) on which a discharge (J) is located, which drives the housing of the sequence control (E) via a linear movement.Drive of the mechanical sequence control of the draw-off group according to Claim 1, characterized byconnection of the housing of the sequence control (E) by means of a toothed belt (M) or a chain, via a gearwheel for maintaining the correct direction of rotation (P), to a rotationally mounted draw-off with toothed ring (Q).Connection of the lock of the retaining groove (C) and the housing of the sequence control (E) of the group of a crabs trigger according to claims 1 and 8, characterised bythe connection of the lock of the retaining groove (C) via a toothed wheel (H) and the housing of the sequence control (E) by means of a toothed belt (L) or chain. If the housing (E) of the mechanical sequence control is also connected to the drive via a toothed belt (M) or chain, the outer toothed ring of the housing of the sequence control (E) can optionally be omitted.

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