A detection device and method for the downward pressure of the bullet shape gauge in a magazine

Abstract

The present invention discloses a detection device and method for the downward pressing amount of a bullet-shaped gauge in a magazine, which can accurately detect the measured value of the downward pressing amount of the bullet-shaped gauges with a specified number installed in the magazine. A detection device for the downward pressing amount of a bullet-shaped gauge in a magazine includes a support plate, as well as a magazine positioning device, a bullet-shaped gauge downward pressing device, a movable measuring rod device, and a dial indicator arranged on the support plate. The magazine positioning device is used to position the magazine equipped with the bullet-shaped gauges; the bullet-shaped gauge downward pressing device is used to apply pressure to the movable measuring rod device; the movable measuring rod device is used to apply pressure to the bullet-shaped gauges in the magazine, and the dial indicator is used to detect the downward pressing amount of the bullet-shaped gauge downward pressing device through the movable measuring rod device.

Description

Technical Field

[0001] The present invention relates to the technical field of firearms, and particularly to a detection device and method for the downward pressure amount of a bullet-shaped gauge in a magazine. Background Art

[0002] A bullet-shaped gauge is used to simulate the shape and weight of a bullet and detect whether there is an activity amount of not less than 3.2 when 30 bullets are loaded into a magazine. Generally speaking, it is a kind of "dummy bullet". The downward pressure amount of the bullet-shaped gauge in the magazine is the distance from the highest point in the free state after the bullet is loaded to the lowest point pressed against the spring force. The downward pressure amount of the bullet-shaped gauge in the magazine should not only ensure that there is an activity amount when 30 bullets are loaded into the magazine, which is convenient for the smooth movement of the bolt and the flexible entry of the bullet into the chamber, but also ensure that the activity amount is not too large (31 bullets cannot be loaded). Whether the downward pressure amount of the specified bullet-shaped gauge in the magazine is qualified directly affects the smoothness of the bolt movement and thus the reliability of the action of the complete firearm mechanism.

[0003] Since the strength of each person is different, there will be differences in the pressing angle, direction and distance. To avoid human factors and maintain the consistency of detection, the force and direction are unified. In the prior art, after loading a specified number of bullet-shaped gauges into the magazine, the method for detecting the downward pressure amount is as follows:

[0004] A depth caliper is used to measure the actual values at the free state of the bullet-shaped gauge and the state where the bullet-shaped gauge is pressed to the lowest point by hand, and calculate the downward pressure amount of the specified number of bullet-shaped gauges loaded in the magazine. During the detection, the magazine bullet holding port is used as the reference point for measurement, the positioning is inaccurate, and the force and direction of hand pressing cannot be accurately controlled, and the calculation is relatively troublesome. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a detection device and method for the downward pressure amount of a bullet-shaped gauge in a magazine, which can accurately detect the actual value of the downward pressure amount of the specified number of bullet-shaped gauges loaded in the magazine.

[0006] The purpose of the present invention is achieved as follows:

[0007] A detection device for the downward pressure amount of a bullet-shaped gauge in a magazine includes a support plate (2), and a magazine positioning device, a bullet-shaped gauge downward pressure device, a movable measuring rod device, and a dial indicator provided on the support plate (2). The magazine positioning device is used to position the magazine loaded with the bullet-shaped gauge; the bullet-shaped gauge downward pressure device is used to apply pressure to the movable measuring rod device; the movable measuring rod device is used to apply pressure to the bullet-shaped gauge in the magazine, and the dial indicator is used to detect the downward pressure amount of the bullet-shaped gauge downward pressure device through the movable measuring rod device.

[0008] Preferably, the magazine positioning device adopts the magazine bin structure of the complete firearm.

[0009] Preferably, the magazine positioning device includes a magazine chamber positioning seat (8), a magazine buckle seat (9), a magazine buckle (12), and a magazine front hanging positioning block (14). The magazine chamber positioning seat (8), the magazine front hanging positioning block (14), and the magazine buckle seat (9) are fixed on the support plate. The magazine chamber positioning seat (8) has a positioning plane and a positioning cylinder. The positioning cylinder is used to be sleeved on the small end of the magazine for positioning, and the positioning plane is used to position the step on one side of the large end of the magazine. One side of the lower end of the magazine front hanging positioning block (14) is provided with a positioning inclined surface, which is used to position the magazine front hanging on the other side of the large end of the magazine. The magazine buckle (12) is hinged to the magazine buckle seat (9) through a magazine buckle shaft (11), and a magazine buckle spring (10) is sleeved on the magazine buckle shaft (11). The magazine buckle spring (10) is used to press and lock the small end side of the magazine by the magazine buckle (12).

[0010] Preferably, the movable measuring rod device includes a pressure rod positioning seat (5) and a cover plate (7) fixed on the support plate. A pressure rod (4) is slidably fitted in the pressure rod positioning seat (5). The pressure rod (4) has a large end and a small end. The small end of the pressure rod (4) has a clearance fit with the cover plate (7), and a compression spring is provided between the large end of the pressure rod (4) and the cover plate (7). The pressure rod (4) is used to press the bullet gauge in the magazine.

[0011] Preferably, the bullet gauge pressing device includes a lever mechanism, a counterweight (13), and a cam mechanism. The lever mechanism includes a lever support frame (1) fixed on the support plate. A lever (21) is hinged on the lever support frame. A hanging sleeve (18) is provided at one end of the lever (21). The counterweight (13) is hung on the hanging sleeve (18) through a hook (15). The counterweight is used to apply force to the lever mechanism. The cam mechanism includes a cam positioning seat (23) fixed on the support plate. A rotatable camshaft (16) is provided on the cam positioning seat (23). A cam (17) is fixed on the camshaft (16). One end of the camshaft (16) is connected to a handle (20) through a cam rotating shaft (22). The cam (17) is used to support the lever (21). The contour of the cam (17) corresponds to the movement range of the lever (21). A relief hole is provided on the lever (21), and the relief hole is used to make way for the pressure rod (4). Pressure bearing surfaces are provided on both sides of the pressure rod (4), and the pressure bearing surfaces cooperate with the lever (21) so that the lever (21) can apply pressure to the pressure rod (4).

[0012] Preferably, cutting portions are symmetrically provided at the upper end of the pressure rod (4), and the steps of the cutting portions form pressure bearing surfaces.

[0013] Preferably, a groove is provided on one side of the large end of the pressure rod (4), and a limiting ball is fixedly provided on the pressure rod positioning seat (5) corresponding to the groove. The limiting ball is fitted in the groove, and the limiting ball is used to limit the movement range of the pressure rod (4). The highest point of the measuring rod (6) corresponds to the highest point of the free state of the elastic gauge.

[0014] Preferably, the pressure rod (4) has a central hole, and a measuring rod (6) is provided in the central hole of the pressure rod (4). A strip-shaped hole is provided on one side of the measuring rod (6), and a limiting member is correspondingly provided in the central hole of the pressure rod (4). The limiting member is fitted in the strip-shaped hole, and the limiting member is used to limit the movement range of the measuring rod (6), so that the lower end of the measuring rod (6) remains in contact with the elastic gauge, and the upper end of the measuring rod (6) corresponds to the dial indicator.

[0015] A method for using a detection device for the downward pressure amount of an elastic gauge in a magazine, characterized in that:

[0016] Rotate the handle (20) so that the highest point of the cam (17) contacts the lever (21);

[0017] Place the measured magazine equipped with a set number of elastic gauges into the magazine positioning seat (8). The small end of the magazine is sleeved into the positioning cylinder of the magazine positioning seat (8), and the step surface at the lower part of the large end of the magazine is fitted and positioned with the positioning plane at the upper part of the magazine positioning seat (8). The upper surface of the front hanging part of the measured magazine is attached to the positioning inclined surface at the lower part of the magazine front hanging positioning block (14). At this time, lock the measured magazine with the magazine buckle (12), and the positioning and clamping of the measured magazine are completed;

[0018] After the positioning and clamping of the measured magazine are completed, the measuring rod (6) contacts the highest point of the free state of the elastic gauge loaded into the measured magazine;

[0019] Zero the dial indicator, and rotate the handle (21). At this time, under the action of the counterweight (13), the lever (21) presses down the pressure rod (4). Under the action of the pressure rod, the elastic gauge overcomes the spring force of the magazine inner support spring and is pressed down to the bottom;

[0020] Read the value of the dial indicator to obtain the detection value.

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

[0022] The detection device of the present invention effectively overcomes the deficiencies of the original detection method, such as inaccurate positioning, inaccurate control of hand pressure and direction, and troublesome calculation when using a depth caliper for detection. It measures the actual sinking amount of the measured magazine filled with a specified number of elastic gauges in the working positioning state, with high detection accuracy. During the production of the magazine, the length dimension of the magazine body can be adjusted in time according to the specific value detected by this device to ensure that the sinking amount of the magazine filled with a specified number of elastic gauges is qualified, thereby improving the smoothness of the bolt movement and further improving the reliability of the complete firearm.

[0023] The detection device of the present invention effectively overcomes the deficiencies of the original measuring tool, such as inaccurate positioning reference, uncontrollable downward pressure direction, inconsistent downward pressure, and inconvenient calculation. It can make the magazine to be measured in a working positioning state for detection, and the downward pressure direction and the downward pressure are completed by the mechanism action, maintaining consistency, with high detection accuracy and convenient reading. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic structural diagram of the present invention;

[0025] Figure 2 It is a schematic structural diagram of the magazine positioning seat;

[0026] Figure 3 It is a schematic structural diagram of the front hanging positioning block of the magazine;

[0027] Figure 4 It is a schematic structural diagram of the pressure rod.

[0028] REFERENCE NUMERALS IN THE DRAWINGS

[0029] In the drawings, 1 - lever support frame; 2 - support plate; 3 - dial indicator base; 4 - pressure rod; 5 - pressure rod positioning seat; 6 - measuring rod; 7 - cover plate; 8 - magazine positioning seat; 9 - magazine buckle seat; 10 - magazine buckle spring; 11 - magazine buckle shaft; 12 - magazine buckle; 13 - counterweight block; 14 - front hanging positioning block of the magazine; 15 - hook; 16 - camshaft; 17 - cam; 18 - hanging sleeve; 19 - bottom plate; 20 - handle; 21 - lever; 22 - cam rotating shaft; 23 - cam positioning seat. DETAILED DESCRIPTION OF THE INVENTION

[0030] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0031] As Figures 1 - 4 shown, a detection device for the downward pressure amount of the bullet shape gauge in the magazine includes a magazine positioning device, a bullet shape gauge downward pressure device, a movable measuring rod device, a dial indicator base and a dial indicator.

[0032] The magazine positioning device consists of a magazine chamber positioning seat 8, a magazine buckle seat 9, a magazine buckle spring 10, a magazine buckle shaft 11, a magazine buckle 12, and a front magazine hanging positioning block 14. This structure is determined by the structure for assembling the magazine on the firearm receiver, and can accurately insert, position, and lock the magazine to keep the magazine in a working state. The measured magazine positioning space formed by the magazine chamber positioning seat 8 is the same as the structure of the magazine chamber of the receiver body, and its size is taken as the minimum actual size of the lower receiver and ensures that the maximum actual size of the magazine can be inserted; the distance between the front magazine hanging positioning block 14 and the magazine buckle shaft 11 is determined by the product size; the distance between the magazine buckle shaft 11 and the front magazine hanging positioning block 14 is determined by the product size; the position dimension between the lower end face of the magazine chamber positioning seat 8 (the upward limiting surface of the measured magazine) and the magazine buckle 12 is determined by the product size; the structures and dimensions of the magazine buckle 12 and the magazine buckle spring 10 are the same as those of the product.

[0033] The bullet-shaped gauge pressing device in the detection device consists of a lever mechanism, a counterweight, and a cam mechanism. Through the combined actions of the counterweight, lever mechanism, and cam mechanism, the pressing action of the detection device from contacting a specified number of bullet-shaped gauges to pressing down to the lowest point can be realized.

[0034] The movable measuring rod device in the detection device is used in cooperation with a dial indicator. When the pressure rod just contacts the bullet-shaped gauge, the dial indicator is reset to zero, and when it is pressed down to the bottom, the amount of descent is read out.

[0035] The centers of the pressure rod 4 and the measuring rod 6 are at a cone (the center of gravity part of the bullet-shaped gauge) where a specified number of bullet-shaped gauges are inserted into the measured magazine.

[0036] The total weight of the counterweight 13 and the hook 15 is calculated, or obtained from the weight of the counterweight required for a qualified magazine filled with a specified number of bullet-shaped gauges to be pressed down to the bottom through actual measurement.

[0037] When the measuring rod 6 does not contact the bullet-shaped gauge, it always moves downward under the action of gravity, and the lowest surface of the measuring rod protrudes from the lowest surface of the pressure rod, ensuring that during the initial insertion into the measured magazine and during the measurement process, the measuring rod always contacts the bullet-shaped gauges inserted into the measured magazine.

[0038] Rotate the handle 20, and with the rotational movement of the cam, the pressure rod can be made to go from contacting the bullet-shaped gauges inserted into the measured magazine to continuously pressing down to the bottom.

[0039] Under the action of the spring force tension in the free state, the pressure rod can maintain that when initially inserted into the measured magazine, the pressure rod does not contact the bullet-shaped gauge, ensuring whether the measured magazine can be smoothly inserted into the magazine positioning device; when pressing down, the pressure rod can move downward with the pressing mechanism, causing the bullet-shaped gauge to overcome the spring force and drop to the bottom.

[0040] The pressure rod 4, measuring rod 6, hanging sleeve 18, and lever 21 in the detection device move flexibly without jamming, ensuring the normal operation of the mechanism.

[0041] Usage method of a detection device for the downward pressure of bullet-shaped gauges in a magazine:

[0042] First, rotate the handle 20 so that the highest point of the cam 17 contacts the lever 21; then place the measured magazine filled with the specified number of bullet-shaped gauges into the magazine positioning seat 8. The front hook of the measured magazine fits with the magazine front hook positioning block 14, and lock the measured magazine with the magazine buckle 12. The positioning and clamping of the measured magazine are completed. At this time, the measuring rod 6 contacts the highest point of the bullet-shaped gauges loaded in the measured magazine in the free state; after zeroing the dial indicator, rotate the handle 21 so that the cam 17 slides down slowly from the highest point in contact with the lever 17 to the bottom. At this time, under the action of the counterweight 13, the lever 21 presses down the pressure rod 4. Under the action of the pressure rod, the bullet-shaped gauges overcome the spring force of the support spring and are pressed down to the bottom; finally, read the dial indicator, read the number of grids rotated by the small pointer and the large pointer of the dial indicator, and the detection value can be obtained.

[0043] The detection method of the present invention is to place a magazine filled with the specified number of bullet-shaped gauges into a device simulating the structure of a magazine chamber. When the measuring rod in contact with the dial indicator just contacts the free height position of the specified number of bullet-shaped gauges, calibrate the dial indicator to zero, rotate the cam to press the bullet-shaped gauges to the bottom, and read the dial indicator to obtain the downward pressure of the magazine filled with the specified number of bullet-shaped gauges. This detection method is more accurate and reliable.

[0044] The invention points of the present invention are:

[0045] a. The magazine positioning device in the detection device is simulated into the structure of a gun magazine chamber, which is the same as the structure of the magazine chamber, magazine buckle, and magazine buckle spring of the gun receiver. After the measured magazine is placed in the magazine positioning device, it can be reliably positioned, and the magazine is in the working positioning state.

[0046] b. The bullet-shaped gauge downward pressure device in the detection device is composed of a lever mechanism, a counterweight, and a cam mechanism. The weight of the counterweight is calculated or the weight of the counterweight required for a qualified magazine filled with the specified number of bullet-shaped gauges and pressed down to the bottom is actually measured. The pressure rod in the downward pressure device, when there is no downward pressure, is pushed upward by the spring to ensure whether the magazine can be smoothly inserted into the magazine positioning device; when pressing down, the pressure rod can move downward with the downward pressure mechanism, so that the bullet-shaped gauges overcome the spring force and drop to the bottom. By rotating the handle, the cam mechanism rotates, and the downward pressure action of the detection device from contacting the specified number of bullet-shaped gauges to pressing down to the lowest point can be realized.

[0047] c. The movable measuring rod device in the detection device is always downward under the action of gravity. When the pressure rod does not contact the bullet-shaped gauges, the measuring rod protrudes from the pressure rod. When the pressure rod contacts the bullet-shaped gauges, the measuring rod also remains in contact with the bullet-shaped gauges.

[0048] d. The dial indicator base in the detection device is used to fix the dial indicator to ensure that the tip of the dial indicator can always contact the measuring rod. When the pressure rod just touches the elastic gauge, the dial indicator is reset to zero. When it is pressed down to the bottom, the amount of descent is read out.

[0049] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. 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 in terms of form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A detection device for the downward pressure of the bullet shape gauge in the magazine, characterized in that: It includes a support plate (2), as well as a magazine positioning device, a bullet gauge pressing device, a movable measuring rod device, and a dial indicator disposed on the support plate (2). The magazine positioning device is used to position the magazine equipped with the bullet gauge; the bullet gauge pressing device is used to apply pressure to the movable measuring rod device; the movable measuring rod device is used to apply pressure to the bullet gauge in the magazine, and the dial indicator is used to detect the pressing amount of the bullet gauge pressing device through the movable measuring rod device.

2. The detection device for the downward pressing amount of the bullet shape gauge in the magazine according to claim 1, wherein: The magazine positioning device adopts the magazine bin structure of a complete firearm.

3. The detecting device for the downward pressing amount of the bullet shape gauge in the magazine according to claim 1 or 2, characterized in that: The magazine positioning device includes a magazine bin positioning seat (8), a magazine buckle seat (9), a magazine buckle (12), and a magazine front hanging positioning block (14). The magazine bin positioning seat (8), the magazine front hanging positioning block (14), and the magazine buckle seat (9) are fixed on the support plate. The magazine bin positioning seat (8) has a positioning plane and a positioning cylinder. The positioning cylinder is used to be sleeved on the small end of the magazine for positioning, and the positioning plane is used to position the step on one side of the large end of the magazine. One side of the lower end of the magazine front hanging positioning block (14) is provided with a positioning inclined surface, and the positioning inclined surface is used to position the magazine front hanging cooperation on the other side of the large end of the magazine. The magazine buckle (12) is hinged to the magazine buckle seat (9) through a magazine buckle shaft (11), and a magazine buckle spring (10) is sleeved on the magazine buckle shaft (11). The magazine buckle spring (10) is used to make the magazine buckle (12) apply pressure to lock the small end side of the magazine.

4. The detecting device for the pressing amount of the bullet shape gauge in the magazine according to claim 1, wherein: The movable measuring rod device includes a pressure rod positioning seat (5) and a cover plate (7) fixed on the support plate. A pressure rod (4) is slidably fitted in the pressure rod positioning seat (5). The pressure rod (4) has a large end and a small end. The small end of the pressure rod (4) has a clearance fit with the cover plate (7), and a compression spring is provided between the large end of the pressure rod (4) and the cover plate (7). The pressure rod (4) is used to apply pressure to the bullet gauge in the magazine.

5. The detecting device for the downward pressing amount of the bullet shape gauge in the magazine according to claim 4, characterized in that: The bullet gauge pressing device includes a lever mechanism, a counterweight (13), and a cam mechanism. The lever mechanism includes a lever support frame (1) fixed on the support plate. A lever (21) is hinged on the lever support frame. A hanging sleeve (18) is provided at one end of the lever (21). The counterweight (13) is hung on the hanging sleeve (18) through a hook (15), and the counterweight is used to apply force to the lever mechanism. The cam mechanism includes a cam positioning seat (23) fixed on the support plate. A rotatable camshaft (16) is provided on the cam positioning seat (23). A cam (17) is fixed on the camshaft (16). One end of the camshaft (16) is connected to a handle (20) through a cam rotation shaft (22). The cam (17) is used to support the lever (21). The contour of the cam (17) corresponds to the movement range of the lever (21). A relief hole is provided on the lever (21), and the relief hole is used to make way for the pressure rod (4). Pressure bearing surfaces are provided on both sides of the pressure rod (4), and the pressure bearing surfaces cooperate with the lever (21) so that the lever (21) can apply pressure to the pressure rod (4).

6. The detection device for the downward pressure of the bullet shape gauge in the magazine according to claim 5, characterized in that: Cutting parts are symmetrically provided at the upper end of the pressure rod (4), and the steps of the cutting parts form pressure bearing surfaces.

7. The detection device for the downward pressing amount of the bullet shape gauge in the magazine according to claim 4, wherein: A groove is provided on one side of the large end of the pressure rod (4). A limiting ball is fixedly provided on the pressure rod positioning seat (5) corresponding to the groove. The limiting ball is fitted in the groove, and the limiting ball is used to limit the movement range of the pressure rod (4). The highest point of the measuring rod (6) corresponds to the highest point of the free state of the elastic gauge.

8. The detecting device for the pressing amount of the bullet shape gauge in the magazine according to claim 4, wherein: The pressure rod (4) has a central hole. A measuring rod (6) is provided in the central hole of the pressure rod (4). A strip-shaped hole is provided on one side of the measuring rod (6). A limiting member is correspondingly provided in the central hole of the pressure rod (4). The limiting member is fitted in the strip-shaped hole, and the limiting member is used to limit the movement range of the measuring rod (6) so that the lower end of the measuring rod (6) remains in contact with the elastic gauge, and the upper end of the measuring rod (6) corresponds to the dial indicator.

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