Patent Publication Number: US-11639834-B2

Title: Buttstock of a small arm and small arm with such a buttstock

Description:
FIELD OF THE DISCLOSURE 
     The disclosure concerns a buttstock of a small arm and a small arm with such a buttstock. 
     BACKGROUND 
     A buttstock of a repeating rifle with a front connection area for positive connection of the buttstock to a connection housing or receiver of the repeating rifle is known from DE 10 2007 014 899 A1. The receiver of the repeating rifle has a magazine shaft on its bottom to accommodate a magazine provided with a trigger unit. The magazine and trigger unit with the trigger guard and the trigger latch form a simply removable unit that can be stored and transported separately from the repeating rifle, but can also be rapidly mounted again as required. A compact design with high reliability is thereby achieved. However, the cartridge capacity of the magazine is restricted. 
     SUMMARY 
     One aspect of the disclosure relates to a buttstock of a small arm and a small arm with such a buttstock that permits increased cartridge capacity. Advantageous embodiments and expedient refinements are disclosed herein. 
     The buttstock according to the disclosure is characterized by the fact that a trigger unit with a trigger latch and a transfer element extending forward for connection of the trigger latch to a trigger mechanism arranged in the receiver is positioned on the buttstock. By displacement of the trigger unit backward on the buttstock, the magazine can protrude farther downward relative to the receiver so that the cartridge capacity can be increased. The compact design can nevertheless be retained. 
     In a particularly advantageous embodiment, the buttstock can consist of an extension piece fastenable to the receiver and a buttstock part fastened releasably on the extension piece. The buttstock part, for example, can be made as a shoulder support adjustable relative to the extension piece or as a rifle butt made of wood, plastic or a composite. The trigger unit with the trigger latch and the transfer element can expediently be arranged on the extension piece. 
     The trigger latch and the transfer element can be arranged in a trigger housing fastened on the buttstock. The transfer element can be expediently designed in the form of a rod or lever. The transfer element is preferably arranged pivotable about an axis and connected to the trigger latch via a linkage so that the front end of the transfer element is raised by pulling the trigger latch. The transfer element can be connected to the trigger mechanism arranged in the receiver via a connection pin movable axially in the trigger housing. 
     The front connection area of the buttstock is preferably adapted to the shape of a pin on the rear of the receiver and has an internal shape corresponding to the external shape of the pin. A precise and reproducible connection between the buttstock and the receiver can thus be achieved. 
     The buttstock can be designed in one or more parts. In a multipart design, the buttstock can have an extension piece fastenable on the back of the receiver and a shoulder support adjustable relative to the extension piece. The shoulder support can be guided to move on a guide part arranged on the extension piece. 
     The trigger unit can expediently be arranged with the trigger latch and the transfer element on the extension piece. A grip designed as a pistol grip, for example, can also be fastened to the extension piece. 
     The disclosure also concerns a small arm with a buttstock as just described. A trigger mechanism connected to the trigger latch on the buttstock via the transfer element can be arranged in the receiver of the small arm 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Additional details and advantages of the disclosure are apparent from the following description of a preferred embodiment example with reference to the drawings. In the drawing: 
         FIG.  1    shows a small arm in a perspective view; 
         FIG.  2    shows the rear part of the small arm depicted in  FIG.  1    in a longitudinal view; 
         FIG.  3    shows the small arm depicted in  FIG.  1    in an exploded view; 
         FIG.  4    shows a second embodiment example of a small arm in a side view, and 
         FIG.  5    shows the rear part of the small arm depicted in  FIG.  4    in a longitudinal view. 
     
    
    
     DETAILED DESCRIPTION 
       FIG.  1    shows in a perspective view a small arm designed here as a repeating rifle with a slide or receiver  1 , a buttstock  2  arranged on the back of the receiver  1 , a front shaft  3  arranged on the front of the receiver  1 , a barrel  4  fastened on the top of the receiver  1 , and a slide  5  arranged to move longitudinally on the receiver  1 . A small arm in the depicted embodiment is designed as a straight-pull repeating rifle with a slide  5  designed as a radial slide. The slide  5  contains a slide housing  7  movable by means of a bolt handle  6  between a retracted open position and a front closed position with a slide assembly  8  arranged on the back on the slide housing  7 . A mounting device  10  designed here as a Picatinny rail is fastened on an end part  9  of barrel  4  widened in diameter to install a telescopic sight or other attachment. 
     As follows from  FIG.  2   , the slide  5  contains the slide head  11  arranged axially movable in slide housing  7  and an expansion sleeve  12  arranged around the slide head  11 , through which the slide  5  can be locked in the rear end part  9  of barrel  4  widened in diameter. A firing pin  14 , acted upon by means of a firing pin spring  13 , is guided to move axially with a firing pin stop  15  in the slide head  11 . The firing pin spring  13  can be tightened or released by the slide assembly  8 . A trigger mechanism with a sear spring  17  cooperating with the firing pin stop  15  and activatable by means of a pin-like connection element  16  is accommodated in the receiver  1 . The structure and function of the trigger mechanism arranged in receiver  1  is described in detail in DE 10 2010 051 641 B3. Explicit reference is made to the disclosure contents with respect to the trigger mechanism accommodated in receiver  1 . It is also apparent from  FIG.  2    that the receiver  1  contains a magazine guide  18  open at the bottom to accommodate a large-volume magazine  19  protruding downward relative to receiver  1 . 
     It is apparent in  FIGS.  2  and  3    that the buttstock  2  includes an extension piece  20  fastened to the back of receiver  1 , a tubular guide part  21  fastened on the extension piece  20  and a shoulder support  22  guided to move on the guide part  21 . The extension piece  20  is mounted positively connected on a trapezoidal or wedge-like pin  23  formed on the back of receiver  1  and fastened by two screws  24 . For this purpose, the extension piece  20  has a contour adapted to the shape of receiver  1 , with a front connection area  25  adapted to the shape of pin  23  on its front facing the receiver  1 . The connection area  25  is designed here as a recess corresponding to the shape of pin  23  with an inside contour corresponding to the outside contour of pin  23 . 
     As follows from  FIG.  3   , the trapezoidal or wedge-like pin  23  and, accordingly, also the connection area  25  of extension piece  20  designed as a recess, widen downward, so that the extension piece  20  is supported and secured against lateral displacement. The shoulder support  22  is guided to move axially on the tubular guide part  21  and can be locked in specified withdrawal or insertion positions via a detent mechanism  27  activatable by means of a lever  26 . The tubular guide part  21  is screwed into a threaded hole  29  on the rear end of extension piece  20  via threads  28 . 
     A trigger unit  30 , depicted in  FIG.  2    with a trigger latch  32  pivotable about a transverse axis  31  and a transfer element  33  extending forward when viewed in the firing direction for connection of the trigger latch  32  to the trigger mechanism accommodated in receiver  1 , is arranged on the bottom of extension piece  20 . The trigger latch  32  and the transfer element  33  are arranged in a trigger housing  34  fastened to the bottom of the extension piece  20 . The transfer mechanism  33  designed in the form of a rod or lever is arranged to pivot within the trigger housing  34  about an axis  35  positioned in the center and is connected to the trigger latch  32  via a linkage  36  arranged on the rear end of the transfer element  33  so that the front end of the transfer mechanism  33  is raised by pulling the trigger latch  32 . The trigger latch  32  is connected to the pin-like connection element  16  of the trigger mechanism accommodated in receiver  1  via the transfer element  33  and a connection pin  37 . The connection pin  37  is guided to move axially in an upwardly protruding attachment of the trigger housing  34 . 
     A grip  38 , designed here as a pistol grip, is also fastened on the bottom of extension piece  20  with a replaceable insert  39 . The grip  38  arranged behind the trigger latch  32  is screwed together with the trigger housing  34  to the bottom of extension piece  20  via a screw  40 . 
     It is apparent in  FIG.  3    that the front shaft  3  consists of a fore end part 41  fastened on the front of the receiver  1  with a replaceable insert  42  and a fore end tip  43  fastened to the front of the fore end part  41 . The magazine  19  has a magazine housing  44 , a magazine stop  45 , a magazine bottom  46 , and a magazine insert  47  arranged in magazine housing  44  with a cartridge feeder  49  acted upon by means of a magazine spring  48 . 
       FIGS.  4  and  5    show another embodiment example of a small arm with an alternative buttstock  2 . The buttstock  2  in this embodiment also has an extension piece  20  fastenable to receiver  1  and a buttstock part releasably fastenable to extension piece  20 . The buttstock part is designed here as a nonadjustable rifle butt  50  with a grip part  51  and a grip hole  52 . Inserts  55  and  56  consisting of leather or another material can be arranged on the rifle butt  50  consisting of wood or plastic and fastened via screws  53  and  54  to extension piece  20 . On the rear end of rifle butt  50 , a shaft end cap  57  is fastened in known fashion. A trigger unit with a trigger latch  32  is also arranged in this embodiment on the extension piece  20  of buttstock  2 . Otherwise, the structure of the small arm corresponds to the embodiment just described, so that corresponding components are provided with the same reference numerals and reference is made to their description. 
     LIST OF REFERENCE NUMBERS 
       1  Receiver 
       2  Buttstock 
       3  Front shaft 
       4  Barrel 
       5  Slide 
       6  Bolt handle 
       7  Slide housing 
       8  Slide assembly 
       9  End part 
       10  Mounting device 
       11  Slide head 
       12  Expansion sleeve 
       13  Firing pin spring 
       14  Firing pin 
       15  Firing pin stop 
       16  Connection element 
       17  Sear spring 
       18  Magazine guide 
       19  Magazine 
       20  Extension piece 
       21  Guide part 
       22  Shoulder support 
       23  Pin 
       24  Screw 
       25  Connection area 
       26  Lever 
       27  Detent mechanism 
       29  Threads 
       29  Threaded hole 
       30  Trigger unit 
       31  Transverse axis 
       32  Trigger latch 
       33  Transfer element 
       34  Trigger housing 
       35  Axis 
       36  Linkage 
       37  Connection pin 
       38  Grip 
       39  Insert 
       40  Screw 
       41  Fore end part 
       42  Insert 
       43  Fore end tip 
       44  Magazine housing 
       45  Magazine stop 
       46  Magazine bottom 
       47  Magazine insert 
       48  Magazine spring 
       49  Cartridge feeder 
       50  Rifle butt 
       51  Grip part 
       52  Grip hole 
       53  Screw 
       54  Screw 
       55  Insert 
       56  Insert 
       57  Shaft end cap