WiFi module signal detection device

Abstract

The invention relates to the technical field of signal detection, in particular to a WiFi module signal detection device which comprises a detection box and a pushing box, the pushing box is slidably installed in the detection box, signal detection can be conducted on a WiFi module in the pushing box, and detection data of the WiFi module can be observed at the top end of the detection box. The detection box and the pushing box are both made of high-density materials and used for isolating WiFi module signals, an adjusting mechanism is installed on the bottom side of the detection box, the adjusting mechanism can synchronously run according to the pushing box, a pushing plate and a detection mechanism are arranged in the pushing box, modules can be rapidly installed, the detection time can be saved, the efficiency can be improved, and the detection efficiency can be improved. The pushing box can be installed in the detection box for detection, the pushing box and the detection box are made of high-density steel materials, interference of external signals can be effectively prevented, the detection efficiency of the module in the module is improved, and it is ensured that the signal index of the module body reaches the standard.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of signal detection, in particular to a WiFi module signal detection device. BACKGROUND

[0002] With the rapid development of the Internet of Things (IoT), smart home, industrial automation and other fields, as the core component of device wireless communication, the signal quality of WiFi module directly determines the connection stability, data transmission efficiency and user experience of terminal device. In the process of research and development, production testing, device deployment and operation and maintenance of WiFi module, the demand for accurate detection of its signal performance is increasingly urgent. For example, the announcement number CN109406089B discloses a kind of signal conditioning device's cut-off frequency gear quick detection device, including for providing signal source to signal conditioning device signal injection module, for collecting the output signal of signal conditioning device signal measurement module, for switching the different input channels between signal injection module and signal conditioning device signal switching module, and with the central processing unit of three kinds of modules connection;The present application device can check and confirm the cut-off frequency of signal conditioning equipment before wind tunnel test, avoid the change of cut-off frequency gear due to human reasons or equipment itself reasons, so that the signal of measurement system during wind tunnel test cannot be filtered according to the expected gear, thereby affecting the test quality.In addition, after the abnormality occurs, the problem of low efficiency of artificial reinspection and troubleshooting is avoided, and the quality of wind tunnel measurement system data and test capacity are guaranteed; The detection device in the prior art can meet the needs in use, but due to the problems of high cost, large size and complex operation of general-purpose equipment, it is difficult to adapt to mass production testing or on-site rapid detection scenarios. At the same time, the WiFi module detection is easily disturbed by surrounding Bluetooth signals or other electronic product signals, resulting in a certain deviation of the detection efficiency of the software tool, which cannot effectively detect the peak value and continuous signal output frequency of the WiFi module, and cannot ensure that the signal indicators of the module body meet the standards. SUMMARY

[0003] The present application aims to provide a WiFi module signal detection device to solve the problems of high cost, large size and complex operation of general-purpose equipment in the prior art, which makes it difficult to adapt to mass production testing or on-site rapid detection scenarios. At the same time, the WiFi module detection is easily disturbed by surrounding Bluetooth signals or other electronic product signals, resulting in a certain deviation of the detection efficiency of the software tool, which cannot effectively detect the peak value and continuous signal output frequency of the WiFi module, and cannot ensure that the signal indicators of the module body meet the standards.

[0004] In order to achieve the above object, the present application provides the following technical scheme: including detection box and push box, the push box is slidably installed in the detection box, the WiFi module can be signal detected in the push box, the detection box top can observe WiFi module detection data, the detection box and push box are made of high density material for isolating WiFi module signal, the adjusting mechanism is installed at the bottom of the detection box, the adjusting mechanism can be synchronized according to the opening of the push box, the adjusting mechanism can supply power for the WiFi module in the push box for signal detection.

[0005] Preferably, the push box comprises a push plate and a detection mechanism, the detection mechanism is installed at the center of the push plate, the detection mechanism can supply power for the WiFi module, the shielding frame is installed on the upper side of the push plate, the shielding frame is used to isolate signals, improve the peak value of internal WiFi module signal and signal transmission stability, the detector is installed at the top of the shielding frame, the fixed column is fixedly arranged at the left bottom end of the push plate, the push block is installed at the right bottom end of the push plate, the fixed column and the push block move to drive the adjusting mechanism to operate.

[0006] Preferably, the adjusting mechanism comprises a steering part, a power supply part and a protection assembly, the steering part is connected with the power supply part, the fixed column moves backward to drive the steering part to operate, the steering part drives the power supply part to rotate, the push block moves backward to drive the protection assembly to operate, the protection assembly operates to facilitate the power supply of the power supply part.

[0007] Preferably, the top of the detection box is provided with an observation window, the two walls in the detection box are provided with side guide rails, the bottom of the right side guide rail is provided with a charging port, the inside of the charging port is protected by the protection assembly, the right side of the inside of the detection box is provided with a limiting column, and the limiting column limits the power supply part.

[0008] Preferably, the front end of the push plate is fixedly provided with an outer cover, the front end of the outer cover is fixedly provided with a handle, and the side of the outer cover is connected with the detection box through a lock buckle.

[0009] Preferably, the detection mechanism comprises a power supply box and a power supply line, the power supply box is installed at the center of the bottom end of the push plate, the top of the power supply box is connected with a main connection box, the two ends of the main connection box are provided with a vice connection box, a plurality of connection ports are arranged at the front ends of the main connection box and the two groups of vice connection boxes, the front ends of the two groups of vice connection boxes are electrically connected with signal sources, the signal strength and frequency of the two groups of signal sources are different, and the detector does not detect the signals generated by the two groups of signal sources.

[0010] Preferably, the shielding frame comprises a U-shaped frame and a clamping block, both sides of the inner part of the U-shaped frame are provided with metal baffles, the upper and lower ends of the metal baffles are provided with clamping blocks, the clamping blocks are correspondingly installed at the top end of the U-shaped frame and the top end of the pushing plate, and the metal baffles can be pulled out.

[0011] Preferably, the turning piece comprises a turning plate and a fixed rotating shaft, the turning plate is a V-shaped plate, the right end of the V-shaped plate is hinged to the rear end of the power supply piece through a connecting shaft, the center of the turning plate rotates in the detection box through a fixed rotating shaft, the top left side of the turning plate is obliquely provided with an extension rod, the front end of the extension rod is fixedly provided with a main spring, and the front end of the main spring is fixedly provided on the inner left wall of the detection box through a mounting block.

[0012] Preferably, the power supply piece comprises a rotating plate and a fixed bearing, the front end top side of the rotating plate is provided with a fixed bearing, the center of the rotating plate rotates in the detection box through a center rotating shaft, the rear end of the rotating plate is hinged to the right end of the turning plate, the rear end left side of the rotating plate is provided with a special-shaped groove, the center of the fixed bearing is provided with a rotating column, the top end of the rotating column is provided with a power source head, and the left end of the power source head is provided with an electric wire connected power source box.

[0013] Preferably, the protection assembly comprises an upper sliding rail and a lower guide sliding rail, the upper sliding rail and the lower sliding rail are respectively installed on the inner sides of the charging ports, the front ends of the upper sliding rail and the lower sliding rail are provided with limiting blocks for sealing, two groups of sliding rods are vertically and fixedly arranged in the limiting blocks, the rear ends of the two groups of sliding rods are installed on the rear wall of the detection box, the centers of the two groups of sliding rods are provided with sliding blocks for forward and backward sliding, the left rear side of the sliding block is fixedly provided with a baffle, the rear end of the sliding block is connected with the rear wall of the detection box through a secondary spring, the secondary spring is limited and can only drive the sliding block to move forward and backward.

[0014] Compared with the prior art, the present application has the following advantages: 1. By arranging the pushing plate and the detection mechanism in the pushing box, the module can be quickly installed and detected, the detection time can be saved and the efficiency can be improved, the pushing box can be installed in the detection box for detection, the pushing box and the detection box are both made of high-density steel material, the interference of external signals can be effectively prevented, the detection efficiency of the module in the interior is improved, and the signal indicators of the module body are ensured to meet the standards; 2. By setting a group of main connection boxes and two groups of auxiliary connection boxes, the front ends of the main connection boxes and the auxiliary connection boxes are provided with a plurality of connection ports, which can adapt to detect different models of modules, improve detection efficiency, improve the applicability of the device, and through the front end of the two groups of auxiliary connection boxes connecting signal sources of different intensity signals, it is beneficial to monitor the anti-interference effect of the module body during operation, thereby improving the signal transmission efficiency of the module body, improving the product detection quality, and through the shield frame that can be split, the module body is effectively isolated from the signal, which is better for the detection instrument to effectively detect the module body and improve the accuracy of the data; 3. By adopting the V-shaped plate turning plate, synchronous operation can be performed under the movement of the pushing plate, the power supply part can be driven to rotate by moving the turning plate, which is convenient for subsequent power supply, the design can reduce the contact between the power supply part and the outside world, improve the service life of the power supply part, and the protection assembly can be opened during module detection, which is convenient for power supply of the power line, and the charging port is closed after detection, the above simple structure can effectively prevent the entry of external dust during operation, thereby reducing the detection of the module signal by the outside world. BRIEF DESCRIPTION OF DRAWINGS In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0015] Figure 1 It is a schematic view of the front view of the structure of the present application; Figure 2 It is a schematic view of the front view of the present application; Figure 3 It is a schematic view of the internal structure of the detection box in the present application; Figure 4 It is a schematic view of the pushing box structure in the present application; Figure 5 It is a schematic view of the adjustment mechanism of the present application; Figure 6 It is a schematic view of the power supply part structure of the present application; Figure 7 It is a schematic view of the protection assembly structure of the present application; Figure 8 It is a schematic view of the side view of the detection box of the present application; Figure 9 It is a schematic view of the detection mechanism structure of the present application.

[0016] In the figure: 1, detection box; 11, observation window; 12, guide rail; 13, limiting column; 14, charging port; 2, push box; 201, outer cover; 202, handle; 203, lock catch; 21, push plate; 22, detection mechanism; 221, power supply box; 222, power cord; 223, main connection box; 2231, connection port; 224, auxiliary connection box; 225, signal source; 23, shielding frame; 231, U-shaped frame; 232, clamping block; 233, metal baffle; 24, detector; 25, fixing column; 26, push block; 3, adjusting mechanism; 31, turning part; 311, turning plate; 3111, V-shaped plate; 3112, connecting shaft; 312, fixed rotating shaft; 313, extension rod; 314, main spring; 315, mounting block; 32, power supply part; 321, rotating plate; 3211, center rotating shaft; 3212, special-shaped groove; 322, fixed bearing; 323, rotating column; 324, power supply head; 325, power cord; 33, protection assembly; 331, upper slide rail; 332, lower slide rail; 333, limiting block; 334, slide rod; 335, sliding block; 336, baffle; 337, auxiliary spring. DETAILED DESCRIPTION The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0017] Please refer to Figures 1-9 An embodiment provided by the present application includes a detection box 1 and a push box 2. The push box 2 is slidably installed in the detection box 1. The WiFi module in the push box 2 can be signal detected. The top end of the detection box 1 can observe the WiFi module detection data. The detection box 1 and the push box 2 are both made of high-density materials to isolate the WiFi module signal. The bottom side of the detection box 1 is installed with an adjusting mechanism 3. The adjusting mechanism 3 can be synchronously operated according to the opening of the push box 2. The adjusting mechanism 3 can supply power to the WiFi module in the push box 2 for signal detection.

[0018] As a further of the present application is push box 2 including push plate 21 and detection mechanism 22, push plate 21 center installation detection mechanism 22, detection mechanism 22 can be powered by WiFi module detection, push plate 21 upper side installation shield frame 23, shield frame 23 is used to isolate signal, improve the peak value of internal WiFi module signal and signal transmission stability, shield frame 23 top installation detection instrument 24, push plate 21 bottom left side fixed with fixed column 25, push plate 21 bottom right side installation push block 26, fixed column 25 and push block 26 movement can be connected with adjusting mechanism 3 operation, through this design can effectively detect the module body, reduce the influence of external signal, improve detection accuracy.

[0019] Further is the top of detection box 1 is provided with an observation window 11, the inside of detection box 1 is provided with side guide rail 12, the bottom of right side guide rail 12 is provided with charging port 14, the inside of charging port 14 is protected by protection assembly 33, the inside of detection box 1 is provided with limiting column 13, limiting column 13 limits power supply 32, through this design is beneficial to the installation of push box, improve the detection efficiency, reduce the detection cost.

[0020] Further is detection mechanism 22 includes power box 221 and power cord 222, power box 221 is installed at the bottom center of push plate 21, the top of power box 221 is connected with main connection box 223, the two ends of main connection box 223 are provided with auxiliary connection box 224, the front ends of main connection box 223 and two groups of auxiliary connection box 224 are provided with a plurality of connection ports 2231, the front ends of two groups of auxiliary connection box 224 are electrically connected with signal source 225, the signal strength and frequency of two groups of signal source 225 are different, detection instrument 24 does not detect the signal generated by two groups of signal source 225, through two groups of signal source with different intensity, the module itself can be detected for anti-interference, thereby improving the accuracy of detection instrument for different signal detection of module, improving the quality of module itself.

[0021] Further is the front end of push plate 21 is provided with outer cover 201, the front end of outer cover 201 is provided with handle 202, the side of outer cover 201 is connected with detection box 1 through lock buckle 203, through the above design, it is convenient to install the module, reduce the detection time, convenient installation.

[0022] Further is shield frame 23 includes U-shaped frame 231 and clamping block 232, the inside of U-shaped frame 231 is provided with metal baffle 233, the upper and lower ends of metal baffle 233 are provided with clamping block 232, clamping block 232 is installed at the top of U-shaped frame 231 and the top of push plate 21, metal baffle 233 can be pulled out, through the above design, not only can the module body be detected by two groups of signal source, but also three groups of module body can be detected by disassembling metal baffle, further reduce the detection time, improve the efficiency.

[0023] Further, the adjusting mechanism 3 comprises a steering piece 31, a power supply piece 32 and a protection assembly 33, the steering piece 31 is connected to the power supply piece 32, the fixed column 25 moves backward to drive the steering piece 31 to operate, the steering piece 31 drives the power supply piece 32 to rotate, the pushing block 26 moves backward to drive the protection assembly 33 to operate, the protection assembly 33 operates to facilitate the power supply to the power supply piece 32 from the outside, which is beneficial to protecting the detection box, prolonging the service life of the device and improving the applicability of detection.

[0024] Further, the steering piece 31 comprises a steering plate 311 and a fixed rotating shaft 312, the steering plate 311 is a V-shaped plate 3111, the right end of the V-shaped plate 3111 is hinged to the rear end of the power supply piece 32 through a connecting shaft 3112, the center of the steering plate 311 rotates in the detection box 1 through the fixed rotating shaft 312, the top left end of the steering plate 311 is obliquely installed with an extension rod 313, the front end of the extension rod 313 is fixedly provided with a main spring 314, the front end of the main spring 314 is fixedly provided in the inner left wall of the detection box 1 through a mounting block 315, the power supply piece 32 comprises a rotating plate 321 and a fixed bearing 322, the top side of the front end of the rotating plate 321 is installed with the fixed bearing 322, the center of the rotating plate 321 rotates in the detection box 1 through a center rotating shaft 3211, the rear end of the rotating plate 321 is hinged to the right end of the steering plate 311, the rear end left side of the rotating plate 321 is provided with a special-shaped groove 3212, the center of the fixed bearing 322 is installed with a rotating column 323, the top end of the rotating column 323 is installed with a power head 324, the left end of the power head 324 is provided with an electric wire 325 connected to the power supply box 221, which is beneficial to positioning the power head, improving the protection effect of the power head and prolonging the service life of the device.

[0025] Further, the protection assembly 33 comprises an upper sliding rail 331 and a lower guide sliding rail 332, the upper sliding rail 331 and the lower sliding rail 332 are respectively installed on the inner side of the charging port 14, the front ends of the upper sliding rail 331 and the lower sliding rail 332 are provided with limiting blocks 333 for sealing, two groups of sliding rods 334 are vertically fixed in the inner part of the limiting block 333, the rear ends of the two groups of sliding rods 334 are installed on the rear wall of the detection box 1, the centers of the two groups of sliding rods 334 are provided with sliding blocks 335 for forward and backward sliding, the left rear side of the sliding block 335 is fixedly provided with a baffle 336, the rear end of the sliding block 335 is connected to the rear wall of the detection box 1 through a secondary spring 337, the secondary spring 337 is limited, and only the sliding block 335 can move forward and backward, which is beneficial to preventing dust from entering and reducing the interference with the signal detection of the module body.

[0026] Working principle: when operating, first, the lock buckle 203 connected with the detection box 1 is opened, then the handle 202 at the front end of the outer cover 201 is pulled to pull out the push plate 21 from the detection box 1, at the same time, the fixed column 25 and the push block 26 at the bottom side of the push plate 21 move forward, and then the steering piece 31 and the protection assembly 33 in the adjusting mechanism 3 return to the original position, and then the module itself is installed on the connecting port 2231 at the front end of the main connecting box 223, and then the push plate 21 is installed in the detection box 1 to close the lock buckle 203, at the same time, the fixed column 25 moves backward to push the extension rod 313 at the rear side to rotate rightward, the extension rod 313 rotates rightward to drive the fixed V-shaped plate 3111 to rotate rightward, the V-shaped plate 3111 rotates to drive the rear end of the rotating plate 321 at the left front side to rotate leftward, and the front end of the rotating plate 321 rotates rightward, and the power head 324 arranged at the top end of the front end of the rotating plate 321 rotates to the right side to be parallel to the charging port 14 of the detection box 1, and the power head 324 is positioned by the resistance of the limiting column 13 at the rear side and the steering of the rotating column 323 and the fixed bearing 322, at the same time, the push block 26 moves backward to push the baffle 336 at the left end of the sliding block 335 to move backward, and the sliding block 335 moves backward in the sliding rod 334 to leak out of the charging port 14 at the right end of the detection box 1; then the external power supply is installed on the power head 324 through the charging port 14 to supply power, the power head 324 supplies power to the power box 221 at the top side through the wire 325, the power box 221 drives the main connecting box 223 to work to start the module, and then the detector at the top end of the shielding frame 23 can detect, when the module itself is detected, first, the external connection with the power head 324 is pulled out, and then the push plate 21 is pulled out to complete the detection, and the operation is ended.

[0027] The above is only a preferred embodiment of the present application, and does not limit the present application in any form; any ordinary technical personnel in the industry can implement the present application according to the drawings and the above description; however, any equivalent changes, modifications and evolution of the above-mentioned technical content without departing from the technical solution of the present application are equivalent embodiments of the present application; at the same time, any equivalent changes, modifications and evolution of the above-mentioned technical content without departing from the technical solution of the present application are equivalent embodiments of the present application.

Claims

1. A WiFi module signal detection device, comprising a detection box (1) and a push box (2), characterized in that: The detection box (1) is slidably installed with a pushing box (2), the pushing box (2) can detect the signal of the WiFi module, the top of the detection box (1) can observe the WiFi module detection data, the detection box (1) and the pushing box (2) are made of high density material for isolating the WiFi module signal, the bottom side of the detection box (1) is installed with an adjusting mechanism (3), the adjusting mechanism (3) can be synchronized according to the opening of the pushing box (2), the adjusting mechanism (3) can supply power to the WiFi module in the pushing box (2) for signal detection.

2. The WiFi module signal detection apparatus of claim 1, wherein: The pushing box (2) comprises a pushing plate (21) and a detection mechanism (22), the detection mechanism (22) is installed at the center of the pushing plate (21), the detection mechanism (22) can detect the power supply of the WiFi module, the shielding frame (23) is installed on the upper side of the pushing plate (21), the shielding frame (23) is used for isolating the signal, improving the peak value of the internal WiFi module signal and the signal transmission stability, the detector (24) is installed at the top of the shielding frame (23), the fixed column (25) is fixedly arranged at the bottom left side of the pushing plate (21), the pushing block (26) is installed at the bottom right side of the pushing plate (21), the fixed column (25) and the pushing block (26) move to drive the adjusting mechanism (3) to run.

3. The WiFi module signal detection apparatus of claim 2, wherein: The adjusting mechanism (3) comprises a steering part (31), a power supply part (32) and a protection assembly (33), the steering part (31) is connected with the power supply part (32), the fixed column (25) moves backward to drive the steering part (31) to run, the steering part (31) drives the power supply part (32) to rotate, the pushing block (26) moves backward to drive the protection assembly (33) to run, the protection assembly (33) runs to facilitate the power supply of the power supply part (32) by the outside world.

4. The WiFi module signal detection apparatus of claim 1, wherein: The top of the detection box (1) is provided with an observation window (11), the two walls inside the detection box (1) are provided with side guide rails (12), the bottom side of the right side guide rail (12) is provided with a charging port (14), the inside of the charging port (14) is protected by the protection assembly (33), the right side of the inside of the detection box (1) is provided with a limiting column (13), the limiting column (13) limits the power supply part (32).

5. The WiFi module signal detection apparatus of claim 2, wherein: The front end of the pushing plate (21) is fixedly provided with an outer cover (201), the front end of the outer cover (201) is fixedly provided with a handle (202), the side of the outer cover (201) is connected with the detection box (1) through a lock buckle (203).

6. The WiFi module signal detection apparatus of claim 2, wherein: The detection mechanism (22) includes a power box (221) and a power line (222), the power box (221) is installed at the bottom end of the push plate (21), the top end of the power box (221) is connected with a main connection box (223), both ends of the main connection box (223) are installed with a sub-connection box (224), the front end of the main connection box (223) and the two groups of sub-connection boxes (224) are provided with a plurality of connection ports (2231), the front end of the two groups of sub-connection boxes (224) are electrically connected with a signal source (225), the signal strength and frequency of the two groups of signal sources (225) are different, and the detector (24) does not detect the signals generated by the two groups of signal sources (225).

7. The WiFi module signal detection apparatus of claim 2, wherein: The shielding frame (23) includes a U-shaped frame (231) and a clamping block (232), both sides of the inner part of the U-shaped frame (231) are provided with metal baffles (233), the upper and lower ends of the metal baffles (233) are provided with clamping blocks (232), the clamping blocks (232) are correspondingly installed at the top end of the U-shaped frame (231) and the top end of the push plate (21), and the metal baffles (233) can be pulled out.

8. The WiFi module signal detection apparatus of claim 3, wherein: The turning piece (31) includes a turning plate (311) and a fixed rotating shaft (312), the turning plate (311) is a V-shaped plate (3111), the right end of the V-shaped plate (3111) is hinged to the rear end of the power supply piece (32) through a connecting shaft (3112), the center of the turning plate (311) rotates in the detection box (1) through the fixed rotating shaft (312), the top end of the left side of the turning plate (311) is obliquely installed with an extension rod (313), the front end of the extension rod (313) is fixedly provided with a main spring (314), and the front end of the main spring (314) is fixedly provided in the inner left wall of the detection box (1) through a mounting block (315).

9. The WiFi module signal detection apparatus of claim 3, wherein: The power supply piece (32) includes a rotating plate (321) and a fixed bearing (322), the top side of the front end of the rotating plate (321) is installed with a fixed bearing (322), the center of the rotating plate (321) rotates in the detection box (1) through a center rotating shaft (3211), the rear end of the rotating plate (321) is hinged to the right end of the turning plate (311), the rear end of the left side of the rotating plate (321) is provided with a special-shaped groove (3212), the center of the fixed bearing (322) is installed with a rotating column (323), the top end of the rotating column (323) is installed with a power head (324), and the left end of the power head (324) is provided with a wire (325) connected with the power box (221).

10. The WiFi module signal detection apparatus of claim 3, wherein: The protection assembly (33) includes upper slide rails (331) and lower guide slide rails (332), the upper slide rails (331) and the lower slide rails (332) are installed on the inner side of the charging port (14) respectively, the front ends of the upper slide rails (331) and the lower slide rails (332) are provided with limiting blocks (333) for sealing, the inside of the limiting block (333) is vertically provided with two groups of slide rods (334), the rear ends of the two groups of slide rods (334) are installed on the rear wall of the detection box (1), the centers of the two groups of slide rods (334) are provided with sliding blocks (335) for sliding forward and backward, the left end rear side of the sliding block (335) is fixedly provided with a baffle (336), the rear end of the sliding block (335) is connected with the rear wall of the detection box (1) through a secondary spring (337), the secondary spring (337) is limited, and only the sliding block (335) can be driven to move forward and backward.

Images