A device for detecting the dimensions of a magazine stop structure and a method of using the same

Abstract

The application discloses a device for detecting the size of a magazine limiting structure and a use method thereof, and can accurately detect whether the limit size of a front hanging limiting surface and a rear hanging limiting surface of a magazine is qualified. The first positioning part simulating the inner cavity structure of the magazine is put into the magazine, a first measuring reference surface is lent out, and then the front hanging size of the magazine is measured by cooperating with the caliper gauge of the application; the first positioning device simulating the inner cavity structure of the magazine is put into the magazine, and then a second positioning part is put into the magazine for measuring the rear hanging limiting surface, a third measuring reference surface fixed with a design reference size and parallel to the rear hanging limiting surface is lent out, and finally whether the clearance formed is qualified is detected by using the plug gauge.

Description

Technical Field

[0001] This invention relates to the field of firearms technology, and in particular to a universal device for detecting the dimensions of a magazine limiting structure and its method of use. Background Technology

[0002] Whether the front magazine mounting dimensions (the distance between the upper plane of the magazine catch port and the contact surface of the front magazine catch port, where the upper plane of the magazine catch port is a virtual plane at the position of the generatrix on the arc surface of the magazine catch port) and the rear magazine mounting limit dimensions (the distance between the upper plane of the magazine catch port and the rear magazine mounting limit surface) are up to standard directly affects the shape and height of the magazine after it is installed in the receiver, thereby affecting the smoothness and reliability of the bolt pushing the magazine into the chamber, and consequently affecting the reliability of the gun assembly mechanism.

[0003] The method for inspecting the front and rear magazine mounting limits generally involves using height and width vernier calipers to measure the distance between the upper plane of the magazine catch port and the design reference (the upper plane of the magazine catch port through which bullets exit), as well as the distance between the upper plane of the magazine catch port and the contact surface of the front magazine catch port and the limiting surface of the rear magazine catch port. These measurements are then calculated. However, this method uses the upper plane of the magazine catch port as the reference point, and the design reference, being a circular arc surface, is inaccurate. Furthermore, because there is an angle between the limiting surface and the design reference, the measured dimensions differ depending on the location of the inspection point. This measurement method is cumbersome and inaccurate.

[0004] Specifically, the original method for detecting the front and rear magazine mounting limits involved placing the magazine catch on a flat surface, ensuring the upper surface of the magazine catch was flush with the surface. Then, height and width calipers were used to measure the distances (A1 and A2) from the upper surface of the magazine catch to the front and rear mounting contact surfaces, respectively. Next, calipers were used to estimate the distance A3 between the upper surface of the magazine catch and the design reference. Finally, the front and rear magazine mounting limits were calculated (A1-A3 and A2-A3, respectively). However, since A3 is the distance from the generatrix to the surface of the arc, measuring it with calipers is inaccurate. Furthermore, the rear mounting surface has a small angle with the upper surface, which affects the measurement result for A2. This method is cumbersome and unreliable. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a universal device and method for detecting the dimensions of magazine limiting structures, which can accurately detect whether the limit dimensions of the front and rear magazine mounting limiting surfaces are qualified.

[0006] The objective of this invention is achieved as follows:

[0007] A universal device for detecting the dimensions of a magazine limiting structure, comprising:

[0008] The first positioning component has an outer shape corresponding to the shape of the magazine cavity. The first positioning component fits into the magazine cavity. The upper end of the first positioning component is limited by the arc surface inside the magazine opening. The upper middle part of the first positioning component has a rectangular groove along the longitudinal direction. The bottom surface of the rectangular groove forms a first measurement reference surface. The upper end of the first positioning component has a rectangular positioning slot along the transverse direction.

[0009] The caliper includes a rectangular positioning rod, which is used to slide within a rectangular groove of a first positioning component and is positioned by a first measuring reference surface. The upper and lower surfaces of the rectangular positioning rod are the first measuring positioning surfaces. Right-angle hook-shaped measuring heads are symmetrically arranged above and below one end of the rectangular positioning rod. The inner surfaces of the two measuring heads are the second measuring reference surfaces. The distance between the second measuring reference surfaces of the two measuring heads and the corresponding first measuring positioning surfaces corresponds to the maximum and minimum values ​​of the magazine front-mounted dimensions. The second measuring reference surfaces of the two measuring heads form a through end and a stop end.

[0010] The second positioning component has a positioning strip along its longitudinal direction at the lower center. The positioning strip is used to position itself within the rectangular groove of the first positioning component. The bottom surface of the positioning strip is a second measuring positioning surface. A downwardly extending positioning tenon is provided on the second measuring positioning surface of the positioning strip. The positioning tenon is used to insert into the positioning slot of the first positioning component to form a sliding fit. Auxiliary plates are provided on both sides of the lower end of the second positioning component. The two auxiliary plates are located outside the magazine. A third measuring reference surface is provided at the lower end of each of the two auxiliary plates. The distance between the third measuring reference surface of the two auxiliary plates and the rear mounting limit surface on both sides of the magazine corresponds to the rear mounting limit dimension of the magazine.

[0011] The plug gauge has a thickness dimension at both ends corresponding to the distance between the third measuring reference surface of the two auxiliary plates and the rear hanging limiting surface. The two ends of the plug gauge form a go end and a no-go end.

[0012] Preferably, the positioning surfaces on both sides of the first positioning component and the magazine are arc-shaped, so that the first positioning component can be inserted into the magazine cavity from below, and the top of the first positioning component can be accurately positioned with the arc surface inside the magazine opening.

[0013] Preferably, the width of the rectangular groove of the first positioning component is smaller than the opening width of the bomb-holding port, ensuring that the top of the first positioning component can be accurately positioned with the arc surface inside the bomb-holding port.

[0014] Preferably, the third measuring reference surface of the two auxiliary plates has a horizontal tilt angle, so that the third measuring reference surface is parallel to the rear hanging limit surface.

[0015] A method for using a universal device for detecting the dimensions of a magazine limiting structure.

[0016] Method for measuring the dimensions of the front-mounted magazine:

[0017] First, place the first positioning component into the magazine. Then, slide the rectangular positioning rod of the caliper into the rectangular groove of the first positioning component. Slide the caliper longitudinally. If the go end of the caliper can pass through and the stop end can stop, the front mounting dimensions of the magazine are qualified; otherwise, they are unqualified.

[0018] Method for measuring the dimensions of the rear-mounted magazine:

[0019] First, the first positioning component is placed into the magazine. Then, the positioning latch on the positioning strip of the second positioning component is inserted into the positioning slot of the first positioning component to form a sliding fit. The positioning strip of the second positioning component fits into the rectangular groove of the first positioning component.

[0020] Insert a plug gauge into the gap between the third measuring reference surface of the two auxiliary plates and the magazine rear mounting limit surface. If the go end of the plug gauge can pass through and the stop end can stop, then the magazine rear mounting limit dimension is qualified; otherwise, it is unqualified.

[0021] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0022] The method and apparatus of this invention can accurately detect whether the limit dimensions of the front and rear magazine mounting surfaces are within acceptable limits. The detection method of this invention involves placing a first positioning component simulating the magazine's internal structure into the magazine, then using a measuring reference surface, and finally measuring the front magazine mounting dimensions with the caliper gauge of this invention. After placing the first positioning component simulating the magazine's internal structure into the magazine, a second positioning component for measuring the rear magazine mounting surface is placed in conjunction, creating a measuring surface that is fixed to the design reference dimension and parallel to the rear magazine mounting surface. Finally, a plug gauge is used to check whether the gap is within acceptable limits. This detection method is faster and more reliable. Attached Figure Description

[0023] Figure 1 A schematic diagram of the first positioning component simulating the internal structure of a magazine.

[0024] Figure 2 A diagram illustrating the use of calipers to measure the dimensions of the front-mounted trailer;

[0025] Figure 3 Schematic diagram of the second positioning component used for measuring the rear hanging limit surface;

[0026] Figure 4 Schematic diagram of a plug gauge used to measure the rear limit dimension;

[0027] Figure 5 This is a schematic diagram of the magazine's structure. Detailed Implementation

[0028] In specific implementation, such as Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, a universal device for detecting the dimensions of a magazine's limiting structure includes a positioning device (first positioning component) that simulates the internal structure of a magazine, a caliper, a positioning device (second positioning component) for measuring the rear mounting limiting surface, and a plug gauge.

[0029] A universal device for detecting the limiting dimensions of front and rear magazine attachments, characterized in that:

[0030] (1) Figure 1 A positioning device simulating the internal structure of a magazine is included. This structure is determined by the magazine's internal structure, allowing for smooth entry into the magazine. It is limited by the arc surface of the magazine's opening, accurately contacting the magazine's design datum and maintaining the relative position L1 between the magazine's design datum and the borrowed positioning measurement surface (first measurement datum surface). The dimensions and tolerances can be arbitrarily chosen as needed; in this embodiment, the tolerance is ±0.005. L2 is the caliper gauge passage surface. In this embodiment, the magazine's opening size is used; however, it can also be smaller to allow the caliper gauge to pass through. L3 and L4 are used to restrict the positioning device on the rear-mounted limiting surface, ensuring that the borrowed measurement surface is parallel to the rear-mounted limiting surface and that the starting point of the angle is fixed. The dimensions of L3 and L4 can be arbitrarily chosen, with a tolerance typically of 0.01. This positioning device should consider the symmetry of the cavity formed by the front and rear ribs of the magazine to ensure flexible entry into the magazine.

[0031] (2) Figure 2 calipers are used for testing. Figure 1 The distance between the borrowed positioning measurement surface (first measurement reference surface) of the positioning device simulating the internal structure of the magazine and the front hanger, the front hanger size - L1 of the product is the basic measurement size L5, L6, and the specific manufacturing size is obtained according to the algorithm of the smooth limit gauge.

[0032] (3) Figure 3 After measurement, a positioning device (second positioning component) is used to hang the limiting surface to ensure alignment with the target surface. Figure 1 After the measuring surface (first measuring reference surface) is attached, the positioning clip is inserted. Figure 1 The L4 positioning slot, through dimensions L7, L8, L9, and α°, ensures that the starting point of the angle of the measuring surface (third measuring reference surface) borrowed by the positioning device from the rear hanging limit surface is fixed with the design reference dimension and parallel to the rear hanging limit surface. The positioning tenon dimensions L7 and L8 are based on... Figure 1 The dimensions of the positioning slots L3 and L4 are determined, and L9 is based on... Figure 1 The dimensions of L1 and the rear mounting limit surface are determined, ensuring that a measurement gap is left after installation; α° is determined by the dimensions on the product drawing, with a tolerance generally one-tenth of the product dimension. L7, L8, L9, and α° are all small tolerance dimensions, generally 0.005mm-0.01mm. L10 only needs to ensure that it can smoothly pass through both sides of the magazine.

[0033] (4) Figure 4 Plug gauges are used for inspection Figure 3 The distance between the measuring surface and the magazine rear mounting limit surface is measured using a positioning device. The product rear mounting limit surface dimensions -L1-L9 are the basic measurement dimensions L11 and L12. The specific manufacturing dimensions are obtained according to the algorithm of the smooth limit gauge.

[0034] A general method for detecting the front and rear magazine mounting limits: First, Figure 1 A positioning device simulating the internal structure of a magazine is inserted into the magazine, and then... Figure 2 Caliper gauge measuring positioning surface and Figure 1 If the reference alignment is used and the sliding caliper gauge can pass through at the through end and stop at the stop end, then the front hanger dimensions are qualified; otherwise, they are unqualified. Figure 1 After the positioning device simulating the internal structure of the magazine is inserted into the magazine, then... Figure 3 Positioning surface and Figure 1 After bonding (including both the flat surface and the slot), use Figure 4 If the plug gauge can pass through the gap between the reference surface and the rear mounting limit surface, and the go end can stop, then the size of the rear mounting limit surface is qualified; otherwise, it is unqualified.

[0035] The testing device of this invention effectively overcomes the shortcomings of the original testing method, which uses height and width vernier calipers for measurement, resulting in inaccurate positioning and cumbersome calculations. It measures the limit dimensions of the front and rear mounting limit surfaces of the magazine under test, achieving higher testing efficiency and accuracy. During magazine production, the results of this device's testing can promptly identify defects in the front and rear mounting limit dimensions, ensuring the magazine meets dimensional standards, thereby improving the smoothness of the bolt action and ultimately enhancing the reliability of the finished weapon.

[0036] The principle of this invention is as follows:

[0037] The positioning device (first positioning component) of the simulated magazine cavity structure in the testing device can accurately contact and reliably position itself with the design reference lines on both sides of the magazine opening after being placed into the magazine cavity to be tested. After the first positioning component of the present invention is placed into the magazine cavity, the measurement reference surface is used to form a regular measurement cavity or solid with the measurement surface. Then, the caliper or plug gauge of the present invention is used to test the front and rear mounting limit dimensions of the magazine.

[0038] The present invention discloses a universal device for detecting the front and rear magazine mounting limits. After placing a first positioning component simulating the magazine's internal structure into the magazine, a first measuring reference surface is used to measure the front magazine mounting dimensions using the caliper of the present invention. After placing the first positioning device simulating the magazine's internal structure into the magazine, a second positioning component for measuring the rear mounting limit surface is placed in conjunction with it. A third measuring reference surface, fixed to the design reference dimension and parallel to the rear mounting limit surface, is used to measure the resulting gap. Finally, a plug gauge is used to check whether the gap is within acceptable limits.

[0039] The detection device of the present invention effectively overcomes the shortcomings of the original detection method, which is difficult to locate the design reference plane and is inconvenient to calculate. It can simply and accurately borrow the measurement reference plane, thus improving the detection efficiency while ensuring the accuracy of the detection.

[0040] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. A universal device for detecting the dimensions of a magazine limiting structure, characterized in that, include: The first positioning component has an outer shape corresponding to the shape of the magazine cavity. The first positioning component fits into the magazine cavity. The upper end of the first positioning component is limited by the arc surface inside the magazine opening. The upper middle part of the first positioning component has a rectangular groove along the longitudinal direction. The bottom surface of the rectangular groove forms a first measurement reference surface. The upper end of the first positioning component has a rectangular positioning slot along the transverse direction. The caliper includes a rectangular positioning rod, which is used to slide within a rectangular groove of a first positioning component and is positioned by a first measuring reference surface. The upper and lower surfaces of the rectangular positioning rod are the first measuring positioning surfaces. Right-angle hook-shaped measuring heads are symmetrically arranged above and below one end of the rectangular positioning rod. The inner surfaces of the two measuring heads are the second measuring reference surfaces. The distance between the second measuring reference surfaces of the two measuring heads and the corresponding first measuring positioning surfaces corresponds to the maximum and minimum values ​​of the magazine front-mounted dimensions. The second measuring reference surfaces of the two measuring heads form a through end and a stop end. The second positioning component has a positioning strip along its longitudinal direction at the lower center. The positioning strip is used to position itself within the rectangular groove of the first positioning component. The bottom surface of the positioning strip is a second measuring positioning surface. A downwardly extending positioning tenon is provided on the second measuring positioning surface of the positioning strip. The positioning tenon is used to insert into the positioning slot of the first positioning component to form a sliding fit. Auxiliary plates are provided on both sides of the lower end of the second positioning component. The two auxiliary plates are located outside the magazine. A third measuring reference surface is provided at the lower end of each of the two auxiliary plates. The distance between the third measuring reference surface of the two auxiliary plates and the rear mounting limit surface on both sides of the magazine corresponds to the rear mounting limit dimension of the magazine. The first positioning component and the positioning surfaces on both sides of the magazine are arc-shaped; The width of the rectangular groove of the first positioning component is smaller than the opening width of the ejector port; The plug gauge has a thickness dimension at both ends corresponding to the distance between the third measuring reference surface of the two auxiliary plates and the rear hanging limiting surface. The two ends of the plug gauge form a go end and a no-go end.

2. The device for universally detecting the dimensions of a magazine limiting structure according to claim 1, characterized in that: The third measurement reference surface of the two auxiliary plates has a horizontal tilt angle, making the third measurement reference surface parallel to the rear hanging limit surface.

3. A method of using the universal magazine limiting structure dimension detection device as described in claim 1, characterized in that: Method for measuring the dimensions of the front-mounted magazine: First, place the first positioning component into the magazine. Then, slide the rectangular positioning rod of the caliper into the rectangular groove of the first positioning component. Slide the caliper longitudinally. If the go end of the caliper can pass through and the stop end can stop, the front mounting dimensions of the magazine are qualified; otherwise, they are unqualified. Method for measuring the dimensions of the rear-mounted magazine: First, the first positioning component is placed into the magazine. Then, the positioning latch on the positioning strip of the second positioning component is inserted into the positioning slot of the first positioning component to form a sliding fit. The positioning strip of the second positioning component fits into the rectangular groove of the first positioning component. Insert a plug gauge into the gap between the third measuring reference surface of the two auxiliary plates and the magazine rear mounting limit surface. If the go end of the plug gauge can pass through and the stop end can stop, then the magazine rear mounting limit dimension is qualified; otherwise, it is unqualified.

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