Sensor environment simulation test device

Abstract

The invention relates to the technical field of sensor detection, in particular to a sensor environment simulation testing device, which comprises a shell part, the clamping part is used for clamping and fixing a sensor to be tested and detected; the environment simulation part is installed in the shell part and generates a simulation environment for detection according to the working environment of the sensor; the system has three different single simulation environments and two different combined simulation environments, environment simulation can be better performed for sensor testing, the simulation environments are more real and comprehensive, and it is ensured that obtained sensor testing data are more accurate; the spray head is automatically opened through water pressure and automatically closed when the water pressure is low, the problem that the spray head is blocked by sandy soil can be avoided, meanwhile, water flow impacts the water rotating strip when passing through the water diversion channel, then the blocking body is driven to rotate, the water flow also has the rotating diversion effect, spraying is more uniform, the environment simulation degree is increased, and the testing effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of sensor detection, and in particular to a sensor environment simulation test device. Background Art

[0002] Sensors can sense the information being measured and transform the sensed information into electrical signals or other required forms of information output according to certain rules to meet the requirements of information transmission, processing, storage, display, recording and control. They are widely used in various fields.

[0003] To ensure the accuracy of detection, the sensor will be placed in a simulated environment for testing after production to ensure accurate detection capabilities even in harsh environments;

[0004] For example, the ambient temperature sensor used in the photovoltaic weather station is mainly used to detect the temperature change of the environment. However, the working environment of the sensor is relatively harsh and needs to work in an environment exposed to wind, sun and rain. Therefore, corresponding environmental simulation tests must be carried out after production.

[0005] At present, the detection is mainly carried out by spraying to simulate rain, direct ultraviolet light to simulate sunlight, and fans to simulate wind. However, these three modes are implemented separately, so different simulation equipment needs to be replaced during the detection, which causes a lot of time waste. At the same time, the effect of environmental combination is not achieved, and the test efficiency is not comprehensive enough.

[0006] In addition, due to the characteristics of the region, some areas are also subject to the harm of sandstorms, so environmental simulation of sandstorms is equally important. Summary of the invention

[0007] In view of the above problems existing in the existing sensor environment simulation test device, the present invention is proposed.

[0008] Therefore, an object of the present invention is to provide a sensor environment simulation test device.

[0009] In order to solve the above technical problems, the present invention provides the following technical solutions: a sensor environment simulation test device, comprising:

[0010] Shell part;

[0011] A clamping part, used for clamping and fixing the sensor to be tested;

[0012] The environment simulation part is installed in the shell part and generates a simulation environment for detection according to the working environment of the sensor.

[0013] As a preferred solution of the sensor environment simulation test device of the present invention, the clamping part includes an electric telescopic rod and a clamping claw installed on the telescopic end of the electric telescopic rod, and the clamping claw is used to fix the sensor to be detected.

[0014] As a preferred solution of the sensor environment simulation test device of the present invention, the environment simulation part includes a rain environment component and a sand explosion environment component, and the rain environment component and the sand explosion environment component rotate around the periphery of the sensor to be tested through a transmission component.

[0015] As a preferred solution of the sensor environment simulation test device described in the present invention, wherein: the rain environment component includes a water tank, water spray pipes are arranged on both sides of the water tank, and the water tank and the water spray pipes are fixedly connected by a ring sleeve bracket, a mounting seat is installed at the bottom of the water tank, a water pump is installed on the mounting seat, the water outlet end of the water pump is connected to the water spray pipe through a water pipe, and nozzles are equidistantly installed at the bottom of the water spray pipe.

[0016] As a preferred solution of the sensor environment simulation test device described in the present invention, the sand explosion environment component includes a sand tank, a motor cavity is opened inside the sand tank, and a sand storage cavity is opened inside the sand tank at one side of the motor cavity, and sand outlet holes are opened at equal distances on the outside of the sand tank.

[0017] As a preferred solution of the sensor environment simulation test device of the present invention, a blocking member for blocking the sand outlet hole is arranged inside the sand storage chamber.

[0018] As a preferred solution of the sensor environment simulation test device of the present invention, the transmission assembly includes a driving member, which is used to drive the rain environment assembly and the sand explosion environment assembly to rotate synchronously, and includes a servo motor and a driving rod.

[0019] As a preferred solution of the sensor environment simulation test device of the present invention, the transmission assembly further includes a rotating part, and the rotating part is used to realize the self-rotation of the sand pot during the rotation process.

[0020] As a preferred solution of the sensor environment simulation test device described in the present invention, the rotating part includes a gear ring fixed to the inner wall of the outer box and a guide block, a limiting block is fixed on one side of the guide block, a gear is rotatably connected to one side of the limiting block, and a stretching rod is fixed between the upper side of the limiting block and the driving rod, and the stretching rod enables the gear to always engage with the outer side of the gear ring.

[0021] As a preferred solution of the sensor environment simulation test device described in the present invention, the nozzle includes a cylinder, a limiting frame is arranged near the top position inside the cylinder, and a water sealing groove is opened at the bottom of the cylinder, and a sealing body which is inserted into one end of the water sealing groove is arranged at the bottom of the water sealing groove, and a pull rod is rotatably connected to the upper end of the sealing body, and the upper end of the pull rod passes through the limiting frame and is fixed with a disc, and a spring 2 is sleeved on the outside of the pull rod between the disc and the limiting frame.

[0022] Beneficial effects of the present invention: The present invention has three different single simulation environments and two different combined simulation environments, which can better simulate the environment for sensor testing. The simulation environment is more realistic and comprehensive, ensuring that the obtained sensor test data is more accurate;

[0023] The nozzle opens automatically by water pressure and closes automatically when the water pressure is low, which can avoid the problem of nozzle blockage caused by sand. At the same time, as the water flows through the water diversion channel, it impacts the water vortex bar, which drives the plugging body to rotate, so the water flow also has a rotating diversion effect, the spray is more uniform, the environmental simulation degree is increased, and the test effect is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0025] Figure 1 It is a schematic diagram of the overall structure of the sensor environment simulation test device of the present invention.

[0026] Figure 2 It is a schematic structural diagram of the shell part in the sensor environment simulation test device of the present invention.

[0027] Figure 3 It is a schematic diagram of the structure of the clamping part in the sensor environment simulation test device of the present invention.

[0028] Figure 4 It is a structural schematic diagram of the environment simulation part in the sensor environment simulation test device of the present invention.

[0029] Figure 5 It is a schematic diagram of the structure of the rain environment component in the sensor environment simulation test device of the present invention.

[0030] Figure 6 It is a schematic diagram of the structure of the sand explosion environment component in the sensor environment simulation test device of the present invention.

[0031] Figure 7It is a structural schematic diagram of the transmission component in the sensor environment simulation test device of the present invention.

[0032] Figure 8 It is a structural schematic diagram of the self-rotating part in the sensor environment simulation test device of the present invention.

[0033] Fig. 9 It is a schematic diagram of the structure of the nozzle in the sensor environment simulation test device of the present invention. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0035] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0036] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0037] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0038] Example 1

[0039] Reference Figure 1-7 , a sensor environment simulation test device, comprising:

[0040] The housing part 100 includes an outer box 101 and a box door 102 rotatably connected to the opening side. The interior of the box door 102 is provided with a detection chamber 103 and a water chamber 104 from top to bottom. The detection chamber 103 and the water chamber 104 are separated by a sieve plate 105.

[0041] An ultraviolet direct lamp and a heat source generator are installed on the inner top of the detection cavity 103. The ultraviolet direct lamp simulates the sunlight environment by irradiation, and the heat source generator uses a ceramic heating tube to increase the temperature in the detection cavity 103;

[0042] The clamping part 200 is used to clamp and fix the sensor to be tested;

[0043] The environment simulation part 300 is installed in the housing part 100 and generates a simulation environment for detection according to the working environment of the sensor.

[0044] Furthermore, the clamping part 200 includes an electric telescopic rod 201 and a clamping claw 202 installed at the telescopic end of the electric telescopic rod 201, the clamping claw 202 is used to fix the sensor to be detected, and the clamping claw 202 is a two-claw manual clamping;

[0045] Furthermore, the environment simulation part 300 includes a rain environment component 301 and a sand explosion environment component 302 . The rain environment component 301 and the sand explosion environment component 302 rotate around the periphery of the sensor to be detected through a transmission component 303 .

[0046] Furthermore, the rain environment component 301 includes a water tank 301a, and water spray pipes 301b are arranged on both sides of the water tank 301a, and the water tank 301a and the water spray pipe 301b are fixedly connected by a ring bracket 301c, a mounting seat 301d is installed at the bottom of the water tank 301a, and a water pump 301e is installed on the mounting seat 301d, and the water outlet end of the water pump 301e is connected to the water spray pipe 301b through a water pipe 301f, and nozzles 301g are equidistantly installed at the bottom of the water spray pipe 301b.

[0047] Specifically, the nozzles 301 g on both sides are inclined inward, and the water spraying ends of the nozzles 301 g correspond to the center of the detection cavity 103 , so as to spray rainwater to the sensor on the clamping claw 202 .

[0048] The water inlet of the water pump 301e is connected to the water storage tank 301a through a water pipe, and a battery is installed on the mounting seat 301d. The battery and the water pump 301e are connected by wires. The battery is used to supply electric energy to the water pump 301e to make it operate. The water pump 301e operates to extract the water source in the water storage tank 301a through the water pipe. The extracted water source enters the water spray pipe 301b through the water delivery pipe 301f. The water source in the water spray pipe 301b is then sprayed out by the nozzle 301g and falls on the sensor on the clamping jaw 202. A simulated rain environment is formed, so that the sensor works in the rain, and the ceramic heating tube generates high temperature. The sensor detects the high temperature and transmits it to the digital display control panel outside the outer box 101. A qualified temperature sensor is installed inside the outer box 101. By comparing the temperature values ​​returned by the two sensors, it is determined whether the ambient temperature measurement of the sensor to be tested in the rain environment is within an appropriate range. At the same time, the rain environment can be combined with the sun environment to make the environment more natural and increase the test range.

[0049] Furthermore, the sand explosion environment component 302 includes a sand tank 302a, a motor cavity 302b is opened inside the sand tank 302a, a sand storage cavity 302c is opened inside the sand tank 302a at one side of the motor cavity 302b, and sand outlet holes 302d are opened equidistantly outside the sand tank 302a.

[0050] Specifically, a sand replenishing hole is opened at the front side of the sand tank 302a, and sand is stored in the sand storage chamber 302c through the sand replenishing hole. When the sand tank 302a rotates, the sand is thrown out from the sand outlet hole 302d by centrifugal force, and the thrown sand hits the sensor, simulating the accuracy of the sensor detecting temperature in a sand explosion environment;

[0051] Furthermore, a blocking member 302e for blocking the sand outlet hole 302d is provided inside the sand storage chamber 302c;

[0052] Specifically, the blocking member 302e includes a rotating disk 302e-1 arranged in the sand storage chamber 302c, the rotating disk 302e-1 is driven by a stepper motor 302e-2, and a sealing strip 302e-3 is fixed equidistantly on one side of the rotating disk 302e-1 near the edge, the stepper motor 302e-2 is powered by a battery, and drives the rotating disk 302e-1 to rotate after operation, and the sealing strip 302e-3 rotates synchronously after the rotating disk 302e-1 rotates, and when the sealing strip 302e-3 rotates and coincides with the sand outlet hole 302d, the sand outlet hole 302d is closed, and the closing can avoid the problem that water source enters in the rain environment mode, causing the sand to stick together and cannot be thrown out by centrifugation, and the sand explosion cycle is performed. In the sandstorm environment, the stepper motor 302e-2 is driven to rotate counterclockwise, thereby driving the seal 302e-3 to move out of the sand outlet hole 302d. The seal 302e-3 is located on one side of the sand outlet hole 302d. Due to the thickness of the seal 302e-3, the sand hits the side of the seal 302e-3 during centrifugal motion and is more easily thrown out. The thrown sand hits the surface of the sensor, thereby simulating a sandstorm environment. The information detected by the sensor in the sandstorm environment is compared with qualified temperature sensors to analyze whether its detection is accurate and whether it can meet the monitoring work in severe weather. At the same time, the sandstorm environment can be combined with the sunlight environment to make the environment more natural and increase the test range.

[0053] Furthermore, the transmission assembly 303 includes a driving member 303a, which is used to drive the rain environment assembly 301 and the sand explosion environment assembly 302 to rotate synchronously, and includes a servo motor 303a-1 and a driving rod 303a-2.

[0054] Specifically, the servo motor 303a-1 is installed on the rear side of the outer box 101, and the two ends of the driving rod 303a-2 are respectively connected to the ends of the water tank 301a and the sand tank 302a, and the central axis of the driving rod 303a-2 is fixed to the transmission shaft of the servo motor 303a-1, and the driving rod 303a-2 is driven to rotate by the drive of the servo motor 303a-1.

[0055] Example 2

[0056] Reference Figure 8 This embodiment is different from the first embodiment in that the transmission assembly 303 in the sensor environment simulation test device of this embodiment further includes a rotating member 303b, and the rotating member 303b is used to realize the self-rotation of the sand pot 302a during the rotation process.

[0057] Furthermore, the rotating member 303b includes a gear ring 303b-1 and a guide block 303b-2 fixed to the inner wall of the outer box 101, a limiting block 303b-3 is fixed to one side of the guide block 303b-2, a gear 303b-4 is rotatably connected to one side of the limiting block 303b-3, and a stretching rod is fixed between the upper side of the limiting block 303b-3 and the driving rod 303a-2, the stretching rod makes the gear 303b-4 always mesh with the outer side of the gear ring 303b-1.

[0058] Specifically, the central axis of the gear 303b-4 passes through the limiting block 303b-3 and the guide block 303b-2 and is fixed to the end of the sand pot 302a. When the sand pot 302a rotates along with the driving rod 303a-2, the gear 303b-4 at its end rotates along the teeth of the gear ring 303b-1, thereby generating rotation. The force of the rotation of the gear 303b-4 will act on the sand pot 302a, causing it to rotate while also generating self-rotation, thereby realizing multi-angle changes of sand and dust, fitting the natural environment, and being more realistic.

[0059] Specifically, the stretching rod includes a main rod 303b-5 fixed to a limiting block 303b-3, and the upper side of the limiting block 303b-3 is located on both sides of the main rod 303b-5 and is fixed with a guide sub-rod 303b-6, the main rod 303b-5 and the guide sub-rod 303b-6 are externally sleeved with a fixed block 303b-7, and the top of the main rod 303b-5 is fixed with an end block 303b-8, the outside of the main rod 303b-5 is located between the end block 303b-8 and the fixed block 303b-7 and is sleeved with a spring 303b-9, the gear ring 303b-1 includes a large arc segment and a small arc segment, the diameter of the large arc segment is larger than that of the small arc segment, and the large arc segment and the small arc segment are connected by a transition segment The guide block 303b-2 is slidably arranged on the inner side of one end of the driving rod 303a-2, and the fixed block 303b-7 is fixed on the surface of the driving rod 303a-2. As the gear 303b-4 rolls along the surface of the gear ring 303b-1, when rolling to a small arc segment, the guide block 303b-2 is driven to slide under the tension of the spring 1 303b-9, thereby making the sand pot 302a close to the sensor to be detected. When rolling to a large arc segment, the change in diameter will cause the guide block 303b-2 to move in the opposite direction and pull the spring 1 303b-9, so that the sand pot 302a is away from the sensor to be detected. The impact force of different sands is simulated according to the change in position, thereby improving the simulation effect.

[0060] The rest of the structure is the same as that of Example 1.

[0061] Example 3

[0062] Reference Fig. 9 This embodiment is different from the above embodiments in that: in the sensor environment simulation test device of this embodiment, the nozzle 301g includes a cylinder 301g-1, a limiting frame 301g-2 is arranged near the top position inside the cylinder 301g-1, and a water sealing groove 301g-3 is opened at the bottom of the cylinder 301g-1, and a blocking body 301g-4 which is inserted into one end of the water sealing groove 301g-3 is arranged at the bottom of the water sealing groove 301g-3, and the upper end of the blocking body 301g-4 is rotatably connected with a pull rod 301g-5, the upper end of the pull rod 301g-5 passes through the limiting frame 301g-2 and is fixed with a disc 301g-6, and the outside of the pull rod 301g-5 is located between the disc 301g-6 and the limiting frame 301g-2 and is sleeved with a spring 2 301g-7.

[0063] Specifically, as the water pressure increases, the water pressure will push the blocking body 301g-4, and the blocking body 301g-4 will move downward. When the blocking body 301g-4 moves downward, it will drive the pull rod 301g-5 to move, and the pull rod 301g-5 moves to compress the spring 2 301g-7. The blocking body 301g-4 is a hemispherical structure, and the water sealing groove 301g-3 is a conical structure. When the blocking body 301g-4 is separated from the water sealing groove 301g-3, water will spray out from the gap between the blocking body 301g-4 and the water sealing groove 301g-3. When the water pressure is insufficient, the spring 2 301g-7 will retract and drive the blocking body 301g-4 to move into the water sealing groove 301g-3 for blocking. After blocking, the problem of sand blockage in a sandstorm environment can be avoided;

[0064] Water swirling bars 301g-8 are fixed at equal intervals on the arc-shaped outer side of the blocking body 301g-4, and the gap between two adjacent water swirling bars 301g-8 forms a water diversion channel 301g-9. Since the blocking body 301g-4 is rotatably connected to the pull rod 301g-5, the water flow will hit the water swirling bars 301g-8 when passing through the water diversion channel 301g-9, ​​causing the blocking body 301g-4 to rotate, and then the water flow will form a rotating diversion, thereby improving the uniformity of spraying.

[0065] The rest of the structure is the same as that of Example 2.

[0066] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to several modifications still falling within the scope of the appended claims.

[0067] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0068] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0069] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A sensor environment simulation test device, characterized in that: include: Housing portion (100); A clamping portion (200) is used to clamp and fix the sensor to be tested; The environment simulation part (300) is installed in the housing part (100) and generates a simulation environment for detection according to the working environment of the sensor.

2. The sensor environment simulation test device according to claim 1, characterized in that: The clamping part (200) comprises an electric telescopic rod (201) and a clamping claw (202) installed at the telescopic end of the electric telescopic rod (201), and the clamping claw (202) is used to fix the sensor to be detected.

3. The sensor environment simulation test device according to claim 2, characterized in that: The environment simulation part (300) comprises a rain environment component (301) and a sand explosion environment component (302), and the rain environment component (301) and the sand explosion environment component (302) rotate around the periphery of the sensor to be detected through a transmission component (303).

4. The sensor environment simulation test device according to claim 3, characterized in that: The rain environment component (301) comprises a water storage tank (301a), water spray pipes (301b) are arranged on both sides of the water storage tank (301a), and the water storage tank (301a) and the water spray pipe (301b) are fixedly connected via a ring bracket (301c), a mounting seat (301d) is installed at the bottom of the water storage tank (301a), a water pump (301e) is installed on the mounting seat (301d), the water outlet end of the water pump (301e) is connected to the water spray pipe (301b) via a water pipe (301f), and nozzles (301g) are equidistantly installed at the bottom of the water spray pipe (301b).

5. The sensor environment simulation test device according to claim 4, characterized in that: The sand explosion environment component (302) comprises a sand tank (302a), a motor cavity (302b) is provided inside the sand tank (302a), a sand storage cavity (302c) is provided inside the sand tank (302a) and located on one side of the motor cavity (302b), and sand outlet holes (302d) are provided at equal intervals on the outside of the sand tank (302a).

6. The sensor environment simulation test device according to claim 5, characterized in that: A blocking member (302e) for blocking the sand outlet hole (302d) is arranged inside the sand storage chamber (302c).

7. The sensor environment simulation test device according to claim 6, characterized in that: The transmission assembly (303) comprises a driving member (303a), and the driving member (303a) is used to drive the rain environment assembly (301) and the sand explosion environment assembly (302) to rotate synchronously, and comprises a servo motor (303a-1) and a driving rod (303a-2).

8. The sensor environment simulation test device according to claim 7, characterized in that: The transmission assembly (303) further comprises a self-rotating member (303b), and the self-rotating member (303b) is used to enable the sand pot (302a) to rotate during the rotation process.

9. The sensor environment simulation test device according to claim 8, characterized in that: The rotating member (303b) comprises a toothed ring (303b-1) fixed to the inner wall of the outer box (101) and a guide block (303b-2); a limiting block (303b-3) is fixed on one side of the guide block (303b-2); a gear (303b-4) is rotatably connected to one side of the limiting block (303b-3); a stretching rod is fixed between the upper side of the limiting block (303b-3) and the driving rod (303a-2); the stretching rod enables the gear (303b-4) to always mesh with the outer side of the toothed ring (303b-1).

10. The sensor environment simulation test device according to claim 4 or 9, characterized in that: The nozzle (301g) includes a cylinder (301g-1), a limiting frame (301g-2) is arranged inside the cylinder (301g-1) near the top position, and a water sealing groove (301g-3) is opened at the bottom of the cylinder (301g-1), and a blocking body (301g-4) is arranged at the bottom of the water sealing groove (301g-3) and is inserted into one end of the water sealing groove (301g-3), and the upper end of the blocking body (301g-4) is rotatably connected to a pull rod (301g-5), and the upper end of the pull rod (301g-5) passes through the limiting frame (301g-2) and is fixed with a disc (301g-6), and the outside of the pull rod (301g-5) is located between the disc (301g-6) and the limiting frame (301g-2) and is sleeved with a spring 2 (301g-7).

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