Retractable inner barrel structure of a bolt

Abstract

A retractable inner barrel structure of a bolt includes a bolt handle which is installed inside a latching groove of a flexible outer barrel with a fixing pin and a spring, and is passed through a gliding groove of a gun barrel, so as to be fixed into a restraining part of the gliding groove, upon pulling back the flexible outer barrel. A retractable inner barrel is located inside the flexible outer barrel, and is provided with two racks at two sides of the retractable inner barrel. Moreover, a spring for fixing a gun barrel shroud is mounted on one of the racks, and a pillar and a seat are also located inside the retractable inner barrel. The gun barrel shroud is provided with a latching groove and an adjusting device including a poking switch for adjusting a trajectory is also installed inside the gun barrel shroud.

Description

BACKGROUND OF THE INVENTION

(a) Field of the Invention

The present invention relates to a retractable inner barrel structure of a bolt, and more particularly to a multi-step retractable inner barrel structure constituted by a utilization of a flexible outer barrel, a retractable inner barrel, a pillar, and a seat.

(b) Description of the Prior Art

As shown in FIG. 1 and FIG. 2, a bolt A1 is latched into a latching groove A2 of an inner barrel A of a conventional firearm. An elastic spring A3, is located inside the inner barrel A, and is mounted on a seat A4 at a rear end of the gun barrel. When the bolt A1 pulls back the inner barrel A, the bolt A1, can be fixed in a gliding groove A5 of the gun barrel, so as to fix the inner barrel A in an interior at the rear end of the gun barrel upon putting the inner barrel A into a holding groove A6 inside the gun barrel.

However, a part of space inside the firearm needs to be taken upon installing the inner barrel A of the firearm. Therefore, it is easy to limit a shape of the firearm when installing the inner barrel A in various firearms.

Accordingly, how to eliminate the aforementioned shortcoming is a technical issue to be solved by the inventor.

SUMMARY OF THE INVENTION

The present invention is to provide a multi-step retractable inner barrel structure of a bolt mainly constituted by a flexible outer barrel, a retractable inner barrel, a pillar, and a seat, wherein the outer barrel is provided with a latching groove, and a bolt handle is located inside the latching groove. The bolt handle is passed through a gliding groove of a gun barrel, so as to be fixed in a restraining part of the gliding groove when the flexible outer barrel is pulled back. A gun barrel shroud is located between the retractable inner barrel and the seat, and is provided with a latching groove which is corresponding to a latching piece mounted on a safety seat. When emplacing the retractable inner barrel into the aforementioned flexible outer barrel, the gun barrel shroud barrel moves backward simultaneously, so as to expose an adjusting device inside the gun barrel shroud, this enables a poking switch on the adjusting device to be used to provide a user to adjust a trajectory of shooting.

To enable a further understanding of the said objectives and the technological methods of the invention herein, the brief description of the drawings below is followed by the detailed description of the preferred embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a perspective view of a conventional application.

FIG. 2 shows a schematic view of motion of a conventional application.

FIG. 3 shows a perspective view of the present invention.

FIG. 4 shows a perspective view of compartments of the present invention.

FIG. 5 shows a perspective view of a portion of compartments of the present invention.

FIG. 6 shows a schematic view of motion of the present invention.

FIG. 7 shows a schematic view of an implementation of the present invention.

FIG. 8 shows another schematic view of an implementation of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring to FIG. 3, FIG. 4, and FIG. 5, a retractable inner barrel B of a bolt is composed of a bolt handle C, a flexible outer barrel D, a retractable inner barrel E, a seat F, a gun barrel shroud G, a safety seat H, and an adjusting device I. The bolt handle C is installed in a latching groove D1 of the flexible outer barrel D with a fixing ping C1 and a spring C2. Whereas a bore C3 is located inside the latching groove D1 for fixing the fixing pin C1. Moreover, the bolt handle C is passed through a gliding groove C4 of the gun barrel, so as to fix the bolt handle C into a restraining part C5 of the gliding groove C4 upon pulling back the flexible outer barrel D.

A spring D2 is located inside the flexible outer barrel D, and is connected to the retractable inner barrel E, which is provided with two racks E1 at two sides. One of the racks E1 is mounted with a spring G1 for fixing the gun barrel shroud G. Moreover, a spring E2 is located inside the retractable inner barrel E, and is connected to a pillar F1 and the seat F. The flexible outer barrel D, the retractable inner barrel E, the pillar F1, and the seat F can constitute into the multi-step retractable inner barrel structure B.

The gun barrel shroud G is located between the retractable inner barrel E and the seat F, and is provided with a latching groove G2 which is corresponding to a latching piece H1 latched onto the safety seat H. When the retractable inner barrel E is emplaced into the aforementioned flexible outer barrel D, the gun barrel shroud G moves backward simultaneously, so as to expose the adjusting device I inside the gun barrel shroud G, this enables a poking switch L1 on the adjusting device I to be used to provide a user to adjust a trajectory of shooting.

Referring to FIG. 6, FIG. 7, and FIG. 8, upon using the present invention, the bolt handle C on the flexible outer barrel D is pulled back so that the bolt handle C can move inside the gliding groove C4 of the gun barrel and be fixed into the retraining part C5 of the gliding groove C4. In addition, when the bolt handle C is fixed into the retraining part C5 of the gliding groove C4, the retractable inner barrel moves simultaneously to enter the flexible outer barrel D, thereby accomplishing a first step of retracing motion.

However, when the flexible outer barrel D and the retractable inner barrel E accomplish the aforementioned first step of retracting motion, the spring E2 located inside the retractable inner barrel E moves towards the pillar F1 and the seat F simultaneously, so as to accomplish a second step of retracting motion between the retractable inner barrel E, the pillar F1, and the seat F.

When the spring E2 located inside the retractable inner barrel E moves to the pillar F1 and seat F, the gun barrel shroud G and the spring G also move backward at the same time. The gun barrel shroud G is provided with the latching groove G2 which is corresponding to the latching piece H1 latched on the safety seat H. When the aforementioned retractable inner barrel E is emplaced into the flexible outer barrel D, the gun barrel shroud E moves backward at the same time, so as to expose the adjusting device I inside the gun barrel shroud G, this enables the poking switch I1 on the adjusting device I to be used to provide a user to adjust a trajectory of shooting.

To further manifest the advancement and practicability of the present invention, the present invention is compared with a conventional application as follow:

Shortcomings of a conventional application

(1) A holding groove is required for emplacing an inner barrel.

(2) A part of space inside a firearm is taken.

(3) It is easy to limit a shape of a firearm.

(4) It does not have advancement and practicability.

Advantages of the present invention

(1) It is provided with a multi-step retractable inner barrel structure.

(2) It can be used in association with a shape of all kinds of firearm.

(3) It can save an inner space of firearm.

(4) It is not easy to limit a shape of firearm.

(5) It is provided with advancement and practicability.

(6) It is provided with an industrial competitiveness.

It is of course to be understood that the embodiments described herein is merely illustrative of the principles of the invention and that a wide variety of modifications thereto may be effected by persons skilled in the art without departing from the spirit and scope of the invention as set forth in the following claims.

Claims

1. A retractable inner barrel structure of a bolt mainly comprising a bolt handle, a flexible outer barrel, a retractable inner barrel, a pillar, a seat, a gun barrel shroud, a safety seat, and an adjusting device, comprising the bolt handle is installed in a latching groove of the flexible outer barrel with a fixing pin and a spring, and is passed through a gliding groove of a gun barrel, so as to be fixed into a restraining part of the gliding groove upon pulling back the flexible outer barrel; the retractable inner barrel being located inside the flexible outer barrel, and racks being located at two sides of the retractable inner barrel, with a spring for fixing the gun barrel shroud mounted on one of the racks; the pillar and the seat being located inside the retractable inner barrel; the gun barrel shroud being provided with a latching groove which is corresponding to a latching piece latched on the safety seat, and the adjusting device being located inside the gun barrel shroud and a poking switch for adjusting a trajectory being located on the adjusting device.