U.S. patent application number 15/942550 was filed with the patent office on 2019-05-23 for frame for pistol with removable metal rail.
The applicant listed for this patent is DASAN MACHINERIES CO., LTD. Invention is credited to Kwang Young HAN, Byung Hak KIM, Jong Bum KIM.
Application Number | 20190154368 15/942550 |
Document ID | / |
Family ID | 61975134 |
Filed Date | 2019-05-23 |
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United States Patent
Application |
20190154368 |
Kind Code |
A1 |
KIM; Byung Hak ; et
al. |
May 23, 2019 |
FRAME FOR PISTOL WITH REMOVABLE METAL RAIL
Abstract
The present invention relates to a frame for a pistol with a
removable metal rail, in which a pistol has a slide made of a
plastic material, and which is capable of preventing the gap
between the slide and the rail of the frame from occurring due to
thermal deformation, and separately disassembling the frame unit
and the rail of the frame from each other to replace them as
occasion demands. According to an aspect of the invention to
achieve the object described above, there is provided a frame for a
pistol with a removable metal rail, a pistol having a slide made of
a reinforced plastic material, the frame including: a frame unit
made of a metal material and having a handle and first and second
insertion parts formed at its upper portion, the first and second
insertion parts being spaced at a predetermined distance from each
other; and front and rear rail blocks made of a metal material and
fixedly inserted into the respective first and second insertion
parts, the slide being slidably assembled to both upper sides of
the front and rear rail blocks, wherein: the first insertion part
has an insertion groove having a predetermined depth, the insertion
groove having a fastening hole formed through both sides thereof;
and the front rail block has an insertion protrusion protruding
downward from its bottom surface by a predetermined length such
that the insertion protrusion is inserted into the insertion
groove, the insertion protrusion having a through-hole formed
through both sides thereof to communicate with the fastening
hole.
Inventors: |
KIM; Byung Hak; (Jeonju-si,
KR) ; KIM; Jong Bum; (Wanju_Gun, KR) ; HAN;
Kwang Young; (Seoul, KR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
DASAN MACHINERIES CO., LTD |
Wanju-Gun |
|
KR |
|
|
Family ID: |
61975134 |
Appl. No.: |
15/942550 |
Filed: |
April 1, 2018 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
F41C 3/00 20130101; F41C
23/10 20130101; F41A 11/02 20130101; F41C 23/18 20130101; F41A 3/66
20130101 |
International
Class: |
F41A 3/66 20060101
F41A003/66; F41C 23/10 20060101 F41C023/10 |
Foreign Application Data
Date |
Code |
Application Number |
Nov 20, 2017 |
KR |
10-2017-0154801 |
Claims
1. A frame for a pistol with a removable metal rail, a pistol
having a slide (1) made of a reinforced plastic material, the frame
comprising: a frame unit (10) made of a metal material and having a
handle and a first insertion part (11) and a second insertion part
(12) formed at its upper portion, the first insertion part (11) and
the second insertion part (12) being spaced at a predetermined
distance from each other; and a front rail block (20) and a rear
rail block (30) made of a metal material and fixedly inserted into
the first insertion part (11) and the second insertion part (12),
respectively, the slide (1) being slidably assembled to both upper
sides of the front rail block (20) and the rear rail block (30),
wherein: the first insertion part (11) has an insertion groove
(11C) having a predetermined depth, the insertion groove (11C)
having a fastening hole (11C') formed through both sides thereof,
wherein the insertion groove (11C) is located at a center of the
frame unit (10) in a transverse direction; and the front rail block
(20) has an insertion protrusion (27) protruding downward from its
bottom surface by a predetermined length such that the insertion
protrusion (27) is inserted into the insertion groove (11C), the
insertion protrusion (27) having a through-hole (27A) formed
through both sides thereof to communicate with the fastening hole
(11C'), wherein the insertion protrusion (27) is located at a
center of the frame unit (10) in a transverse direction.
2. The frame for a pistol with a removable metal rail as claimed in
claim 1, wherein the second insertion part (12) comprises: an
inclined contact portion (12A) that is inclined at a predetermined
angle; a horizontal contact portion (12B) that is spaced rearward
at a predetermined distance from the inclined contact portion (12A)
and has a horizontal surface; a curved portion (12C), the upper end
of which is connected to the horizontal contact portion (12B) while
the other end thereof is curved downward in an arc form; and a
vertical contact portion (12D) having a vertical surface while the
upper end thereof is connected to the lower end of the curved
portion (12C) wherein: a pair of pin coupling holes (H1 and H2) is
formed through both sides of the second insertion part between the
inclined contact portion (12A) and the vertical contact portion
(12D) and between the inclined contact portion (12A) and the curved
portion (12C), respectively.
3. The frame for a pistol with a removable metal rail as claimed in
claim 2, wherein the rear rail block (30) comprises: a first
contact part (31) that is inclined to come into surface contact
with of the inclined contact portion (12A) of the second insertion
part (12) while the rear rail block (20) is inserted into the
second insertion part (12); a rear support part (32) that has a
second contact part (32A) formed at the bottom surface thereof to
come into surface contact with the horizontal contact portion
(12B); a connection portion (33) having an arc shape that is spaced
at a predetermined distance from the curved portion (12C); a third
contact part (34) that comes into surface contact with the vertical
contact portion (12D) while the upper end thereof is connected to
the lower end of the connection portion (33); and a pair of rear
rails (35) that protrudes from both sides of the rear rail block in
opposite directions in the upper portion between the first contact
part (31) and the rear support part (32), and each of the rear
rails (35) has a horizontal length.
4. The frame for a pistol with a removable metal rail as claimed in
claim 1, wherein the front rail block (20) comprises: a front
support part (21) that has a vertical surface coming into surface
contact with the inside front of the first insertion part (11); a
rear support part (22) that has an inclined surface while coming
into contact with the inside rear of the first insertion part (11);
a pair of front rails (23) that protrudes from both sides of the
front rail block in opposite directions in the upper portion
between the front support part (21) and the rear support part (22)
and each of the front rails (23) has a horizontal length; a slide
lock through-hole (24) that is formed through the side surfaces
between the rear support part (22) and the front rails (23); and a
recoil spring installation groove (25) having a predetermined depth
that is formed between the pair of the front rails (23).
5. The frame for a pistol with a removable metal rail as claimed in
claim 1, wherein the front rail block (20) and the rear rail block
(30) are made of an aluminum material.
6. The frame for a pistol with a removable metal rail as claimed in
claim 1, wherein the front rail block (20) has groove portions (26)
formed by cutting both sides thereof by a predetermined depth to
reduce the weight of the front rail block (20).
7. The frame for a pistol with a removable metal rail as claimed in
claim 4, wherein a first slide lock support protrusion (24A) and a
second slide lock support protrusion (24B) are formed in the recoil
spring installation groove (25), and extend from the slide lock
through-hole (24)
8. The frame for a pistol with a removable metal rail as claimed in
claim 7, wherein guide grooves (24A' and 24B) are formed in the
middle portions of the first and the second slide lock support
protrusions (24A and 24B), respectively.
9. The frame for a pistol with a removable metal rail as claimed in
claim 1, wherein the first insertion part (11) has only one single
insertion groove (11C) and the front rail block has only one single
insertion protrusion (27).
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application claims the priority of the Korean Patent
Application NO 10-2017-0154801 filed on Nov. 20, 2017 in the Korean
Intellectual Property Office, the disclosure of which is
incorporated herein by reference.
BACKGROUND OF THE INVENTION
Field of the Invention
[0002] The present invention relates to a frame for a pistol with a
removable metal rail, and more particularly, to a frame for a
pistol with a removable metal rail, which is positioned at the
lower portion of a slide made of reinforced plastic material, to be
assembled to the slide.
Description of the Related Art
[0003] In a glock pistol, the components thereof such as a slide, a
lower gun body, and a magazine etc., which are not directly
associated with the discharge of bullets, are made of light
reinforced synthetic plastic materials having a stiffness similar
to a metal, so that it reduces the weight of the pistol and is easy
to carry.
[0004] However, if the slide and the lower gun body etc. made of
the reinforced synthetic plastic materials are kept at a higher
temperature for a long time, as though it has an excellent
stiffness plastic, the shapes thereof are deformed more or less and
gaps between the assembled internal parts are generated.
[0005] In particular, the thermal deformation of the lower gun body
made of plastic materials causes malfunctions and functionality
failures between various components assembled to the lower gun
body. As a result, it can deteriorate the shooting accuracy of the
gun and the operation reliability thereof. Also, since it can cause
the shooting accident etc. owing to the unnecessary gaps between
the components, the safety of using the gun can be also
deteriorated.
[0006] Therefore, recently, a metal part is added to the lower gun
body of the glock pistol or it suggests a method of replacing the
plastic lower gun body with the metal one.
[0007] As the conventional techniques for the above purposes, U.S.
Pat. No. No. 6,260,301 (Title: Pistol whose housing is composed of
plastic) and US publication No. 2009-0071053(Title: Modular firearm
system with interchangeable grip and slide assemblies and an
improved firing pin safety for firearm) have been disclosed. In the
pistol (firearm) disclosed in the patent literatures, a metallic
part (hereinafter called as `metal insert`) is attachably and
deattachably inserted into the lower gun body made of the plastic
materials and the trigger and the safety pin etc. are assembled by
the metal insert. As a result, it is characterized in that the
assembling status of the trigger and the safety pin etc. can be
maintained under high temperature.
[0008] However, since the metal insert disclosed in the above
patent literatures is manufactured by pressing and bending a thin
sheet, it is not easy to manufacture the component having a fine
machining tolerance owing to the manufacturing characteristic
thereof. Therefore, since the gap between the lower gun body (gun
body frame) and the metal insert is generated, the vibration and
the noise are generated during firing of the bullet, thereby
deteriorating the shooting accuracy thereof due to the
vibration.
[0009] In addition, in order to solve the above problem, there is a
method in that the entire lower gun body is made of the metallic
materials. In this case, when the bullets are continuously fired or
it is used in a high temperature environment, since a
high-temperature heat is transmitted to the gripping portion for
gripping the pistol by means of the user, it has trouble in using
the pistol.
[0010] Accordingly, it requires the development of the frame for a
polymeric pistol, capable of securing the structural soundness of
firearms to secure an accuracy rate of bullet even in
high-temperature environments, maintaining performance thereof for
a long time without the deformation of the components, preventing
the high-temperature heat generated in a barrel or the like from
being transferred, as it is, to a handle of the frame, and
disassembling and replacing components as occasion demands.
PATENT LITERATURE
[0011] Patent Literature 1: U.S. Pat. No. 5,655,326 B1 (Aug. 12,
1997)
[0012] Patent Literature 2: U.S. Pat. No. 6,993,864 B1 (Feb. 7,
2006)
[0013] Patent Literature 3: U.S. Pat. No. 8,156,677 B1 (Apr. 17,
2012)
[0014] Patent Literature 4: US 2014-0007479 A1 (Jan. 9, 2014)
[0015] Patent Literature 5: US 2009-0071053 A1 (Mar. 19, 2009)
SUMMARY OF THE INVENTION
[0016] The present invention has been made in view of the problem
of the above-mentioned conventional plastic pistol, and an object
thereof is to provide a frame for a pistol with a removable metal
rail, in which a pistol has a slide made of a plastic material, and
which is capable of preventing the gap between the slide and the
rail of the frame from occurring due to thermal deformation, and
separately disassembling the frame unit and the rail of the frame
from each other to replace them as occasion demands.
[0017] According to an aspect of the invention to achieve the
object described above, there is provided a frame for a pistol with
a removable metal rail, a pistol having a slide made of a
reinforced plastic material, the frame including: a frame unit made
of a metal material and having a handle and first and second
insertion parts formed at its upper portion, the first and second
insertion parts being spaced at a predetermined distance from each
other; and front and rear rail blocks made of a metal material and
fixedly inserted into the respective first and second insertion
parts, the slide being slidably assembled to both upper sides of
the front and rear rail blocks, wherein: the first insertion part
has an insertion groove having a predetermined depth, the insertion
groove having a fastening hole formed through both sides thereof;
and the front rail block has an insertion protrusion protruding
downward from its bottom surface by a predetermined length such
that the insertion protrusion is inserted into the insertion
groove, the insertion protrusion having a through-hole formed
through both sides thereof to communicate with the fastening
hole.
[0018] Preferably, the second insertion part includes: an inclined
contact portion that is inclined at a predetermined angle; a
horizontal contact portion that is spaced rearward at a
predetermined distance from the inclined contact portion and has a
horizontal surface; a curved portion, the upper end of which is
connected to the horizontal contact portion while the other end
thereof is curved downward in an arc form; and a vertical contact
portion having a vertical surface while the upper end thereof is
connected to the lower end of the curved portion wherein: a pair of
pin coupling holes is formed through both sides of the second
insertion part between the inclined contact portion and the
vertical contact portion and between the inclined contact portion
and the curved portion, respectively.
[0019] Preferably, the rear rail block includes: a first contact
part that is inclined to come into surface contact with of the
inclined contact portion of the second insertion part while the
rear rail block (20) is inserted into the second insertion part; a
rear support part that has a second contact part formed at the
bottom surface thereof to come into surface contact with the
horizontal contact portion; a connection portion having an arc
shape that is spaced at a predetermined distance from the curved
portion; a third contact part that comes into surface contact with
the vertical contact portion while the upper end thereof is
connected to the lower end of the connection portion; and a pair of
rear rails that protrudes from both sides of the rear rail block in
opposite directions in the upper portion between the first contact
part and the rear support part, and each of the rear rails has a
horizontal length.
[0020] Preferably, the front rail block includes: a front support
part that has a vertical surface coming into surface contact with
the inside front of the first insertion part; a rear support part
that has an inclined surface while coming into contact with the
inside rear of the first insertion part; a pair of front rails that
protrudes from both sides of the front rail block in opposite
directions in the upper portion between the front support part and
the rear support part and each of the front rails has a horizontal
length; a slide lock through-hole that is formed through the side
surfaces between the rear support part and the front rails so that
the slide lock is inserted and installed in the slide lock
through-hole; and a recoil spring installation groove having a
predetermined depth that is formed between the pair of the front
rails.
[0021] Preferably, the front rail block and the rear rail block are
made of an aluminum material.
BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The above and other objects, features and advantages of the
present invention will be more apparent from the following detailed
description taken in conjunction with the accompanying drawings, in
which:
[0023] FIG. 1 is a perspective view illustrating an example of a
frame for a pistol with a removable metal rail according to an
embodiment of the present invention;
[0024] FIG. 2 is an exploded perspective view illustrating an
example in which a frame for a pistol, a front rail block, and a
rear rail block according to an embodiment of the present invention
are separated from each other;
[0025] FIG. 3 is a perspective view illustrating an example of the
frame according to an embodiment of the present invention;
[0026] FIG. 4 is a top view of FIG. 3;
[0027] FIG. 5 is a sectional view illustrating an example of
another frame according to an embodiment of the present
invention;
[0028] FIG. 6A is a perspective view illustrating a front side of
the front rail block according to an embodiment of the present
invention;
[0029] FIG. 6B is a perspective view illustrating a rear side of
the front rail block according to an embodiment of the present
invention;
[0030] FIG. 7A is a plan view of FIG. 6A;
[0031] FIG. 7B is a side view of FIG. 6A;
[0032] FIG. 8A is a perspective view illustrating an example of
another rear rail block according to an embodiment of the present
invention;
[0033] FIG. 8B is a side view of FIG. 8A;
[0034] FIG. 9 is a cross-sectional view illustrating an example in
which the frame for a pistol, the front rail block, and the rear
rail block are assembled to each other according to an embodiment
of the present invention; and
[0035] FIG. 10 is a view illustrating a state of use in an example
in which a slide is assembled by the front rail block and the rear
rail block according to an embodiment of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0036] Hereinafter, preferred embodiments of the invention will be
described in more detail with reference to the accompanying
drawings. The present invention is to provide a frame for a pistol
with a removable metal rail, in which a pistol has a slide made of
a plastic material, and which is capable of preventing the gap
between the slide and the rail of the frame from occurring due to
thermal deformation, and separately disassembling the frame unit
and the rail of the frame from each other to replace them as
occasion demands. As illustrated in FIGS. 1 and 2, a frame (2)
according to an embodiment of the present invention includes a
frame unit (10), a front rail block (20), and a rear rail block
(30).
[0037] The frame unit (10) has a handle that allows a user to grip
a pistol, and is configured such that a magazine is inserted
through the bottom surface of the handle to supply bullets stored
in the magazine toward the upper portion of the frame unit
(10).
[0038] As illustrated in FIGS. 3 and 4, the frame unit (10)
includes a first insertion part (11) and a second insertion part
(12) which are formed at the upper portion thereof and are spaced
at a predetermined distance from each other. The front rail block
(20) is inserted and installed in the first insertion part (11) and
the rear rail block (30) is inserted and installed in the second
insertion part (12), which will be described later.
[0039] The frame unit (10) includes a magazine insertion part (13)
that is formed between the first insertion part (11) and the second
insertion part (12) to vertically communicate along the handle. The
magazine insertion part (13) has an installation hole (13A) formed
through one surface thereof. A magazine catch (not shown) is
installed in the installation hole (13A) to be elastically
supported by springs so that the magazine (not shown) inserted
through the magazine insertion part (13) is restricted or the
restriction thereof is released.
[0040] In addition, the first insertion part (11) is formed by
forming a groove having a predetermined depth in the upper portion
of the frame unit (10). As illustrated in FIGS. 4 and 5, the first
insertion part (11) includes a front support protrusion (11A) that
has a vertically stepped shape to support the front of the front
rail block (20), which will be described later, and a pair of rear
support protrusions (11B) that are spaced rearward at a
predetermined distance from the front support protrusion (11A) and
protrude from both sides of the first insertion part while facing
each other to support the rear side surfaces of the front rail
block (20).
[0041] The first insertion part (11) has an insertion groove (11C)
formed on the bottom thereof, and the insertion groove (11C) has a
predetermined depth while having a spherical, cylindrical, or
square sectional shape. The insertion groove (11C) has a fastening
hole (11C') formed through both sides thereof.
[0042] Furthermore, a slide lock installation hole (11D) is formed
through both sides of the frame unit between the front support
protrusion (11A) and the rear support protrusions (11B) and a slide
lock (not shown) is installed in the slide lock installation hole
(11D) to restrict the sliding of a slide (2) or release the
restriction thereof.
[0043] When the front rail block (20) to be described later is
inserted into the first insertion part (11) by the structure of the
first insertion part (11), the movement of the front rail block
(20) is suppressed while the position of the front rail block (20)
is naturally fixed by the front and rear support protrusions (11A
and 11B). At the same time, the front rail block (20) is strongly
fixed to the first insertion part (11) by a screw or a bolt (or a
fastening pin) assembled through the fastening hole (11C'), thereby
preventing the arbitrary separation of the front rail block
(20).
[0044] Meanwhile, the second insertion part (12) is positioned in
the rear of the frame unit (10) and is formed by forming a groove
having a predetermined depth in the upper portion of the frame unit
(10), as in the first insertion part (11).
[0045] As illustrated in FIG. 5, the second insertion part (12)
includes an inclined contact portion (12A) that is inclined at a
predetermined angle, a horizontal contact portion (12B) that is
spaced rearward at a predetermined distance from the inclined
contact portion (12A) and has a horizontal surface, a curved
portion (12C), the upper end of which is connected to the
horizontal contact portion (12B) while the other end thereof is
curved downward in an arc form, and a vertical contact portion
(12D) having a vertical surface while the upper end thereof is
connected to the lower end of the curved portion (12C).
[0046] A pair of pin coupling holes (H1 and H2) is formed through
both sides of the second insertion part between the inclined
contact portion (12A) and the vertical contact portion (12D) and
between the inclined contact portion (12A) and the curved portion
(12C), respectively.
[0047] By the structure of the second insertion part (12), the rear
rail block (30) to be described later is installed to
simultaneously come into contact with three surfaces of the
inclined contact portion (12A), the horizontal contact portion
(12B), and the vertical contact portion (12D). Thus, the rear rail
block (30) is inserted into the second insertion part (12) while
being tightly supported by the three surfaces of the second
insertion part 12, thereby allowing the position of the rear rail
block to be fixed.
[0048] The front rail block (20) made of a metal material is
installed in the first insertion part (11) of the frame unit (10),
and the front bottom surface of the slide (2) made of a reinforced
plastic material is slidably assembled by the front rail block
(20).
[0049] As illustrated in FIGS. 6A and 6B, the front rail block (20)
has front and rear support parts (21 and 22) that are respectively
formed on one surface and the other surface thereof by cutting a
rectangular material. The first support part (21) has a vertical
surface coming into surface contact with the inside front of the
first insertion part (11), and the rear support part (22) has an
inclined surface while coming into contact with the inside rear of
the first insertion part (11).
[0050] A pair of front rails (23) protrudes from both sides of the
front rail block in opposite directions (more specifically, toward
outside sides) in the upper portion between the front support part
(21) and the rear support part (22), and each of the front rails
(23) has a horizontal length. A slide lock through-hole (24) is
famed through the side surfaces between the rear support part (22)
and the front rails (23) so that the slide lock is inserted and
installed in the slide lock through-hole (24).
[0051] In addition, as illustrated in FIG. 7A, a recoil spring
installation groove (25) having a predetermined depth is formed
between the pair of the front rails (23) so that one end of a
recoil spring (not shown) for recharging the slide is inserted into
and supported by the recoil spring installation groove (25). First
and second slide lock support protrusions (24A and 24B) are formed
in the recoil spring installation groove (25), and extend from the
slide lock through-hole (24) to respectively support both sides of
the slide lock. Guide grooves (24A' and 24B') are respectively
formed in the middle portions of the slide lock support protrusions
(24A and 24B), and the certain widths of the guide grooves (24A'
and 24B') are partially cut such that one end of a lock spring is
inserted into and guided by the guide grooves (24A' and 24B').
[0052] The recoil spring installation groove (25) has a mounting
groove (25A) that has a predetermined depth and is formed on the
bottom thereof so that the lock spring for elastically supporting
the slide lock is installed in the mounting groove (25A).
[0053] Furthermore, the front rail block (20) has groove portions
(26) formed by cutting both sides thereof by a predetermined depth
to reduce the weight of the front rail block (20) made of a metal
material. As illustrated in FIG. 7B, the front rail block (20) has
an insertion protrusion (27) that has a predetermined length and
protrudes downward from the bottom surface thereof such that the
insertion protrusion (27) is inserted into the insertion groove
(11C) of the first insertion part (11).
[0054] The insertion protrusion (27) has a through-hole (27A)
formed in the side surface thereof to communicate with the
fastening hole (11C') of the first insertion part (11).
[0055] When the front rail block (20) is inserted into the first
insertion part (11) of the frame unit (10) by the structure of the
front rail block (20), the front support protrusion (11A)
vertically comes into surface contact with the front support part
(21) of the front rail block (20) and, at the same time, the rear
support protrusions (11B) of the first insertion part (11) come
into contact with the rear support part (22) of the front rail
block (20), thereby allowing the insertion position of the front
rail block (20) to be accurately guided.
[0056] Furthermore, a screw, a bolt, or a fastening pin is
assembled through the outside of the frame unit (10) such that the
insertion protrusion (27) is inserted into the insertion groove
(11C) of the first insertion part (11) and then passes through the
fastening hole (11C') and the through-hole (27A) in sequence. Thus,
the front rail block (20) inserted into the first insertion part
(11) is fixed in the state in which it is in contact with the
bottom and front and rear support protrusions (11A and 11B) of the
first insertion part (11) so that the first insertion part (11) is
tightly assembled to the front rail block (20) without gap
therebetween.
[0057] The rear rail block (30) is installed in the second
insertion part (12) of the frame unit (10). By the rear rail block
(30), the slide (2) is slidably assembled while a trigger mechanism
housing (not shown) is strongly installed.
[0058] In the rear rail block (30), as illustrated in FIGS. 8A and
8B, a first contact part (31) is inclined to come into surface
contact with of the inclined contact portion (12A) of the second
insertion part (12) while the rear rail block (20) is inserted into
the second insertion part (12), and a rear support part (32) has a
second contact part (32A) formed at the bottom surface thereof to
come into surface contact with the horizontal contact portion (12B)
of the second insertion part (12).
[0059] A connection portion (33) having an arc shape is spaced at a
predetermined distance from the curved portion (12C) of the second
insertion part (12), and a third contact part (34) comes into
surface contact with the vertical contact portion (12D) while the
upper end thereof is connected to the lower end of the connection
portion (33).
[0060] In addition, a pair of rear rails (35) protrudes from both
sides of the rear rail block in opposite directions in the upper
portion between the first contact part (31) and the rear support
part (32), and each of the rear rails (35) has a horizontal length.
The rear rail block has through-holes (36 and 37) formed in the
side surfaces thereof at positions corresponding to the pin
coupling holes (H1 and H2) of the second insertion part (12).
[0061] As illustrated in FIG. 9, when the rear rail block (30) is
inserted into the second insertion part (12) of the frame unit (10)
by the structure of the rear rail block (30), the insertion
position of the rear rail block (30) is accurately guided while the
first contact part (31) comes into surface contact with the
inclined contact portion (12A) of the second insertion part
(12).
[0062] When the rear rail block (30) is inserted to a suitable
depth, the vertical contact portion (12D) of the second insertion
part (12) comes into surface contact with the third contact part
(34). As a result, the position of the rear rail block (30), which
is inserted along the inclined surface of the first contact part
(31) and the vertical surface of the third contact part (34), is
naturally fixed as the rear rail block (30) is inserted into the
second insertion part (12).
[0063] Furthermore, when the rear rail block (30) is sufficiently
inserted and reaches a position at which the height of the rear
rail block (30) is fixed, the horizontal contact portion (12B) of
the second insertion part (12) comes into surface contact with the
second contact part (32A) formed at the bottom surface of the rear
support part (32) of the rear rail block (30), so that the height
of the rear rail block (30) is fixed while the rear rail block is
not inserted any more.
[0064] As a result, only by the insertion of the rear rail block
(30) into the second insertion part (12), the rear rail block (30)
is easily installed at an accurate position without movement while
the first, second, and third contact parts (31, 32A, and 34)
simultaneously come into surface contact with three surfaces having
structurally different directions (angles).
[0065] In the process of assembling the frame for a pistol with a
removable metal rail having the above structure according to an
embodiment of the present invention, as illustrated in FIG. 9, the
front rail block (20) is inserted into the first insertion part
(11) of the frame unit (10) and then the screw, the bolt, or the
fastening pin is inserted into the fastening hole (11C'). Thus, the
front rail block (20) is fixedly installed in the first insertion
part (11) of the frame unit (10).
[0066] Next, the rear rail block (30) is inserted into the second
insertion part (12), and the coupling pins are inserted into the
pin coupling holes (H1 and H2) so that the rear rail block (30) is
fixedly installed in the second insertion part (12). In this case,
before fixing the rear rail block (30) using the coupling pins, the
trigger mechanism housing may be inserted into the second insertion
part (12) together with the rear rail block (30) and the rear rail
block (30) and the trigger mechanism housing may be simultaneously
assembled using the fastening pin.
[0067] When each of the front and rear rail blocks (20 and 30) has
been assembled to the frame unit (10) as described above, the
components such as a barrel, a recoil spring assembly, a trigger, a
magazine, and safety pin are sequentially assembled to the frame
unit (10). Then, the assembly of the pistol is completed by
assembling the slide (1) made of a plastic material onto the frame
unit (10) such that the slide is slidable by the front and rear
rail blocks (20 and 30), as illustrated in FIG. 10).
[0068] Meanwhile, since the frame unit (10) and the front and rear
rail blocks (20 and 30) are each made of a metal material in the
present invention, it is possible to significantly reduce problems
relating to the accidental discharge and malfunction of firearms, a
deterioration of accuracy rate, and the like due to thermal
deformation. In this case, the front and rear rail blocks (20 and
30) are preferably made of a metal material that is resistant to
rust or corrosion.
[0069] In accordance with the present invention, a frame for a
pistol having a slide made of a plastic material is made of a metal
material and the frame is manufactured to be separated into a frame
unit and front and rear rail blocks. Therefore, the present
invention is advantageous in that each component can be separately
replaced as occasion demands.
[0070] In addition, the present invention is advantageous in that
the front and rear rail blocks are structurally easily and strongly
assembled into the first and second insertion parts of the frame
unit.
[0071] Furthermore, since the front and rear rail blocks are
manufactured by cutting a metal material in the form of block, it
is possible to secure the accuracy rate and reliability of
operation of firearms while preventing the front and rear rail
blocks from being easily deformed or damaged even due to external
force.
[0072] In addition, the front rail block and the rear rail block
can be easily and strongly assembled to the first insertion part
and the second insertion part of the frame.
[0073] While the present invention has been described with respect
to the specific embodiments, it will be apparent to those skilled
in the art that various changes and modifications may be made
without departing from the spirit and scope of the invention as
defined in the following claims.
* * * * *