A protective device

Abstract

The utility model provides a kind of protective device, it is related to precision instrument protection technical field, to solve the problem that existing protective device needs to be opened completely or disassembled protective device when replacing sample or adjusting instrument each time, leading to the problem of tedious operation and low efficiency is designed.The protective device includes fixed cover, movable cover and locking assembly, fixed cover includes first left side plate, first right side plate 120, front side plate and rear side plate, front side plate includes roof portion, front plate portion and the arc plate portion between roof portion and front plate portion, arc plate portion arches in the direction away from the inner cavity of fixed cover, arc plate portion is equipped with with the operating port that inner cavity is communicated;Movable cover is pivotally installed in the inside of fixed cover, including arc sealing plate, arc sealing plate has the closed position of closing operating port and the open position of exposing operating port;Locking assembly is arranged between movable cover and fixed cover.The utility model replaces sample or adjusting instrument operation simple, and efficiency is higher.

Description

Technical Field

[0001] This utility model relates to the field of precision instrument protection technology, and more specifically, to a protective device. Background Technology

[0002] Precision instruments refer to equipment and devices used to generate and measure precise quantities, including but not limited to the measurement of high-precision surface morphology and the detection of thin film thickness. They are widely used in materials science, semiconductor manufacturing, and optical component processing. Because their measurement accuracy is typically at the nanometer level, factors such as vibration, noise, and airflow in the external environment can significantly interfere with the measurement results, leading to data distortion or increased measurement errors. Therefore, in practical use, precision instruments usually need to be equipped with protective devices to minimize adverse interference.

[0003] However, the protective devices currently in use require complete opening or disassembly each time a sample is changed or the instrument is adjusted, which is not only cumbersome but also inefficient. Utility Model Content

[0004] The purpose of this invention is to provide a protective device to solve the technical problem that existing protective devices require complete opening or disassembly each time a sample is changed or an instrument is adjusted, resulting in cumbersome operation and low efficiency.

[0005] The protective device provided by this utility model includes a fixed cover, a movable cover, and a locking component.

[0006] The fixing cover has a bottom opening and includes a first left side plate, a first right side plate, a front side plate and a rear side plate. The front side plate includes a top plate portion, a front plate portion and an arc-shaped plate portion located between the top plate portion and the front plate portion. The arc-shaped plate portion arches away from the inner cavity of the fixing cover and has an operating port communicating with the inner cavity.

[0007] The movable cover is pivotally mounted inside the fixed cover and includes an arc-shaped sealing plate. The arc of the arc-shaped sealing plate matches the arc of the arc-shaped plate portion. The arc-shaped sealing plate has a closed position that closes the operating port and an open position that exposes the operating port.

[0008] The locking component is disposed between the movable cover and the fixed cover to enable the movable cover to remain in the closed position.

[0009] Furthermore, the movable cover also includes a second left side plate and a second right side plate, and the arc-shaped sealing plate is fixedly connected between the second left side plate and the second right side plate. A rotating component is provided between the second left side plate and the first left side plate and between the second right side plate and the first right side plate. The rotating component is configured to allow the movable cover to be pivotally mounted on the fixed cover.

[0010] Furthermore, the locking assembly includes a first magnetic suction member and a second magnetic suction member that magnetically engage, wherein the first magnetic suction member is located in the inner cavity, and at least one of the first left side plate and the first right side plate is provided with the first magnetic suction member; the second magnetic suction member is fixedly disposed on at least one of the second left side plate and the second right side plate, and the position of the second magnetic suction member matches the position of the first magnetic suction member.

[0011] Furthermore, at least one of the first left side plate and the first right side plate is vertically fixed with an internally threaded post, the internally threaded post extending in the left-right direction; the locking assembly further includes a rubber sleeve and a fastening screw, wherein the rubber sleeve has openings at both ends and is fitted onto the internally threaded post; the first magnetic attractor has a fixing hole, the fixing hole is fitted into the internally threaded post and abuts against the end face of the rubber sleeve, and the fastening screw is screwed onto the internally threaded post and abuts against the first magnetic attractor.

[0012] Furthermore, at least one of the first left side plate and the first right side plate is vertically fixed with two internal threaded posts, and the two internal threaded posts are arranged at intervals along the front-back direction; the first magnetic suction member has two fixing holes, and the two fixing holes are respectively fitted into the two internal threaded posts one-to-one.

[0013] Furthermore, the protective device also includes a limiting component for holding the movable cover in the open position.

[0014] Furthermore, the limiting component includes a limiting post and a slot. The first left side plate and the first right side plate are both vertically fixed with the limiting post, which extends in the left-right direction. The second left side plate and the second right side plate are both provided with the slot. In the open position, the opening of the slot faces downward to engage with the limiting post on the corresponding side.

[0015] Furthermore, both the second left side plate and the second right side plate are provided with weight reduction holes.

[0016] Furthermore, the rotating assembly includes a bearing housing, a rotating bearing, and a bearing rod, wherein the bearing housing is fixedly disposed on both the first left side plate and the first right side plate, the bearing rod is fixedly disposed on the bearing housing and extends in the left-right direction, the inner ring of the rotating bearing is fixedly fitted onto the bearing rod, and the outer ring of the rotating bearing on the corresponding side is fixedly fitted onto the second left side plate and the second right side plate.

[0017] Furthermore, both the first left side panel and the first right side panel are provided with mounting openings, and each mounting opening is fitted with a handle, the handle being provided with a concave handle groove; and / or, the protective device further includes a sealing ring, the sealing ring being fixedly disposed in the bottom opening along the circumference of the bottom opening; and / or, the movable cover further includes a handle, the handle being fixedly disposed in the arc-shaped sealing plate, and in the open position, the handle is located at the top of the arc-shaped sealing plate; and / or, the inner surface of the fixed cover is fixedly provided with a sound insulation layer.

[0018] The beneficial effects of this protective device are:

[0019] In use, this protective device can be fitted over the precision instrument through the bottom opening of the fixed cover, placing the instrument within the cavity of the fixed cover. When the precision instrument is operating, the movable cover can be rotated to switch the arc-shaped sealing plate from the open position to the closed position, sealing the operating port of the fixed cover and isolating the cavity from the outside environment. This reduces the transmission of external vibrations, dust, noise, and other factors into the cavity, thereby minimizing adverse interference to the precision instrument. Throughout this process, the movable cover remains in the closed position under the action of the locking component, preventing the arc-shaped sealing plate from accidentally opening during instrument operation. When it is necessary to change samples or adjust the instrument, the movable cover can be rotated in the opposite direction, switching the arc-shaped sealing plate from the closed position to the open position, exposing the operating port for sample replacement and instrument adjustment.

[0020] Therefore, it can be seen that the protective device, through the above-mentioned settings, can not only protect precision instruments and reduce adverse interference, but also, when it is necessary to change samples or adjust instruments, simply rotate the movable cover to switch the arc-shaped sealing plate from the closed position to the open position, and the sample can be changed and the instrument adjusted through the operating port. The operation is simple and efficient. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0022] Figure 1 One of the structural schematic diagrams of the protective device provided in Embodiment 1 of this utility model, which encloses a precision instrument;

[0023] Figure 2 This is a schematic diagram of the protective device provided in Embodiment 1 of the present invention when the arc-shaped sealing plate is in the closed position;

[0024] Figure 3 This is a partial structural schematic diagram of the protective device provided in Embodiment 1 of this utility model;

[0025] Figure 4 for Figure 3 Enlarged view of the local structure at point A;

[0026] Figure 5 A schematic diagram of the structure of the fixing cover of the protective device provided in Embodiment 1 of this utility model;

[0027] Figure 6 A schematic diagram of the structure of the movable cover of the protective device provided in Embodiment 1 of this utility model;

[0028] Figure 7 The second schematic diagram of the protective device provided in Embodiment 1 of this utility model, which encloses a precision instrument;

[0029] Figure 8 for Figure 7 Enlarged view of the local structure at point B;

[0030] Figure 9 This is a partial structural schematic diagram of the protective device provided in Embodiment 2 of this utility model;

[0031] Figure 10 for Figure 9 Enlarged view of the local structure at point C;

[0032] Figure 11 for Figure 9 Enlarged view of the local structure at point D.

[0033] Explanation of reference numerals in the attached figures:

[0034] 100-Fixed cover; 200-Modible cover; 300-Locking assembly; 400-Rotating assembly; 500-Limiting assembly; 600-Sealing ring; 010-Precision instrument;

[0035] 110 - First left side panel; 120 - First right side panel; 130 - Front panel; 131 - Top panel; 132 - Front panel; 133 - Curved panel; 1331 - Operating port; 140 - Rear panel; 150 - Handle; 160 - Mounting port;

[0036] 210 - Second left side plate; 220 - Second right side plate; 230 - Weight reduction hole; 240 - Handle; 250 - Rotation hole; 260 - Arc-shaped sealing plate; 260 - Pull pin; 270 - Return spring;

[0037] 310 - First magnetic component; 320 - Second magnetic component; 330 - Internally threaded post; 340 - Rubber sheath; 350 - Fastening screw;

[0038] 410-Bearing housing; 420-Rotating bearing; 430-Bearing rod; 440-Fixed shaft; 450-Fixed seat; 510-Limiting post; 520-Slot. Detailed Implementation

[0039] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit it.

[0040] Example 1

[0041] Figure 1 One of the structural schematic diagrams of the protective device provided in this embodiment that encloses the precision instrument 010; Figure 2 This is a schematic diagram of the protective device provided in Embodiment 1 when the arc-shaped sealing plate 260 is in the closed position. Figure 1 and Figure 2 As shown, this embodiment provides a protective device, including a fixed cover 100, a movable cover 200, and a locking component 300.

[0042] Figure 3 This is a partial structural diagram of the protective device provided in Embodiment 1; Figure 4 for Figure 3 Enlarged view of the local structure at point A; Figure 5 This is a schematic diagram of the structure of the fixing cover 100 of the protective device provided in this embodiment; Figure 6 This is a schematic diagram of the structure of the movable cover 200 of the protective device provided in this embodiment. Figures 3 to 6As shown, specifically, the fixing cover 100 has a bottom opening. The fixing cover 100 includes a first left side plate 110, a first right side plate 120, a front side plate 130, and a rear side plate 140. The front side plate 130 includes a top plate portion 131, a front plate portion 132, and an arc-shaped plate portion 133 located between the top plate portion 131 and the front plate portion 132. The arc-shaped plate portion 133 arches away from the inner cavity of the fixing cover 100, and the arc-shaped plate portion 133 has an operating port 1 communicating with the inner cavity. 331; The movable cover 200 is pivotally mounted inside the fixed cover 100. The movable cover 200 includes an arc-shaped sealing plate 260, wherein the arc of the arc-shaped sealing plate 260 matches the arc of the arc-shaped plate portion 133. The arc-shaped sealing plate 260 has a closed position that closes the operating port 1331 and an open position that exposes the operating port 1331. A locking assembly 300 is disposed between the movable cover 200 and the fixed cover 100 to enable the movable cover 200 to be held in the closed position.

[0043] When in use, this protective device can be fitted over the precision instrument 010 through the bottom opening of the fixed cover 100, placing the precision instrument 010 within the inner cavity of the fixed cover 100. During operation of the precision instrument 010, the movable cover 200 can be rotated to switch the arc-shaped sealing plate 260 from the open position to the closed position. The arc-shaped sealing plate 260 closes the operating port 1331 of the fixed cover 100, isolating the inner cavity of the fixed cover 100 from the outside environment and reducing the transmission of external vibrations, dust, noise, and other factors into the inner cavity, thereby minimizing adverse interference to the precision instrument 010. Throughout this process, the movable cover 200 remains in the closed position under the action of the locking component 300 to prevent the arc-shaped sealing plate 260 from accidentally opening during the operation of the precision instrument 010. When it is necessary to change the sample or adjust the instrument, the movable cover 200 can be rotated in the opposite direction, so that the arc-shaped sealing plate 260 is switched from the closed position to the open position, so as to expose the operation port 1331. The purpose of changing the sample and adjusting the instrument can be achieved through the operation port 1331.

[0044] Therefore, it can be seen that the protective device, through the above-mentioned settings, can not only protect the precision instrument 010 and reduce the adverse interference it causes, but also, when it is necessary to change the sample or adjust the instrument, simply rotate the movable cover 200 to switch the arc-shaped sealing plate 260 from the closed position to the open position, and the sample can be changed and the instrument adjusted through the operation port 1331. The operation is simple and efficient.

[0045] Please continue to refer to Figure 3 and Figure 6In this embodiment, the movable cover 200 may further include a second left side plate 210 and a second right side plate 220, and an arc-shaped sealing plate 260 is fixedly connected between the second left side plate 210 and the second right side plate 220. A rotating assembly 400 is provided between the second left side plate 210 and the first left side plate 110 and between the second right side plate 220 and the first right side plate 120. The rotating assembly 400 is configured to pivotally mount the movable cover 200 to the fixed cover 100.

[0046] This configuration allows the movable cover 200 to be rotatably connected to the fixed cover 100 on both the left and right sides simultaneously, ensuring uniform force distribution on both sides of the movable cover 200 and thus improving the smoothness of the rotation of the movable cover 200.

[0047] Please continue to refer to Figure 3 and Figure 4 In this embodiment, the rotating assembly 400 may include a bearing seat 410, a rotating bearing 420, and a bearing rod 430. Specifically, the first left side plate 110 and the first right side plate 120 are both fixedly provided with bearing seats 410, the bearing rod 430 is fixedly provided with the bearing seat 410 and extends in the left and right direction, the inner ring of the rotating bearing 420 is fixedly fitted onto the bearing rod 430, and the second left side plate 210 and the second right side plate 220 are fixedly fitted onto the outer ring of the rotating bearing 420 on the corresponding side.

[0048] In this protective device, the bearing seat 410 of the rotating assembly 400 provides overall support. When the movable cover 200 is subjected to rotational force, since the inner ring of the rotating bearing 420 is fixedly fitted with the bearing rod 430, and the bearing rod 430 remains stationary, the outer ring of the rotating bearing 420, which is fixedly fitted with the movable cover 200, will rotate relative to its inner ring. This allows the movable cover 200 to rotate and open or close relative to the fixed cover 100. This configuration of the rotating assembly 400 is not only simple in structure but also ensures flexible rotation.

[0049] Please continue to refer to Figure 6 In this embodiment, the second left side plate 210 and the second right side plate 220 are both provided with rotation holes 250. The second left side plate 210 and the second right side plate 220 are fitted onto the outer ring of the rotation bearing 420 on the corresponding side through their respective rotation holes 250.

[0050] Please continue to refer to Figure 1 In this embodiment, the locking component 300 may include a first magnetic member 310 and a second magnetic member 320 that magnetically engage. The first magnetic member 310 is located in the inner cavity, and both the first left side plate 110 and the first right side plate 120 are provided with the first magnetic member 310. The second left side plate 210 and the second right side plate 220 are both provided with the second magnetic member 320, and the position of the second magnetic member 320 is matched with the position of the first magnetic member 310.

[0051] When the movable cover 200 is rotated to the closed position, the first magnetic member 310 will magnetically engage with the second magnetic member 320, using the magnetic force between the first magnetic member 310 and the second magnetic member 320 to keep the movable cover 200 in the closed position; when it is necessary to switch the movable cover 200 from the closed position to the open position, by applying a force to the movable cover 200, the magnetic engagement between the first magnetic member 310 and the second magnetic member 320 can be released, thereby realizing the opening of the movable cover 200.

[0052] This method of using the magnetic attraction between the first magnetic member 310 and the second magnetic member 320 to keep the movable cover 200 in the closed position not only makes it easy to lock the movable cover 200 to the fixed cover 100 in the closed position, but also allows the locking state to be quickly released when the movable cover 200 is opened, thus improving the opening efficiency of the movable cover 200.

[0053] In addition, by providing the aforementioned locking components 300 on both sides of the movable cover 200, that is, when the movable cover 200 is in the closed position, there is a magnetic attraction between its left and right sides and the fixed cover 100, which also ensures the stability of the movable cover 200 after it is closed and avoids the movable cover 200 from being partially opened, thus reducing the protective performance.

[0054] Figure 7 The second schematic diagram of the structure of the protective device provided in this embodiment 1, which encloses the precision instrument 010; Figure 8 for Figure 7 A magnified view of the local structure at point B. (See image below.) Figure 7 and Figure 8 As shown, both the first left side plate 110 and the first right side plate 120 are vertically fixed with internally threaded posts 330, which extend in the left-right direction; the locking assembly 300 also includes a rubber sleeve 340 and a fastening screw 350, wherein the rubber sleeve 340 has open ends and is fitted onto the internally threaded post 330; the first magnetic member 310 has a fixing hole, the fixing hole is fitted into the internally threaded post 330 and abuts against the end face of the rubber sleeve 340, and the fastening screw 350 is screwed onto the internally threaded post 330 and abuts against the first magnetic member 310.

[0055] When assembling the first magnetic component 310, the rubber sleeve 340 can be first fitted onto the internal thread post 330. Then, the fixing hole of the first magnetic component 310 is fitted into the internal thread post 330 and abuts against the end face of the rubber sleeve 340. After that, the fastening screw 350 is tightened, and the first magnetic component 310 is fixed on the internal thread post 330 by the fastening action of the fastening screw 350.

[0056] This method of fixing the first magnetic component 310 is not only reliable and reduces the risk of loosening, but also facilitates disassembly and maintenance.

[0057] Please continue to refer to Figure 7 and Figure 8 In this embodiment, two internally threaded posts 330 are vertically fixed on the first left side plate 110 and the first right side plate 120, and the two internally threaded posts 330 are arranged at intervals along the front-back direction; the first magnetic suction member 310 has two fixing holes, and the two fixing holes are respectively fitted into the two internally threaded posts 330.

[0058] This setting can limit the rotation of the first magnetic component 310, so that the magnetic surface of the first magnetic component 310 always remains in the same position, and avoids the magnetic attraction effect from deteriorating due to changes in the position of the first magnetic component 310.

[0059] It should be noted that in other embodiments, the locking component 300 may be provided only on one side of the movable cover 200, which can also achieve locking of the movable cover 200 in the closed position. In this case, it is only necessary to provide an internally threaded post 330 on one of the first left side plate 110 and the first right side plate 120 to fix the first magnetic member 310 on that side.

[0060] It should also be noted that in this embodiment, "left-right direction" and "front-back direction" can be referred to as Figure 1 As indicated by the corresponding arrow.

[0061] Please continue to refer to Figure 1 In this embodiment, the protective device may further include a limiting component 500, wherein the limiting component 500 is used to keep the movable cover 200 in the open position.

[0062] The limiting component 500 is designed so that the movable cover 200 can remain in this position after it is opened, preventing the movable cover 200 from shaking and causing damage to the precision instrument 010 inside.

[0063] Please continue to refer to Figure 1 In this embodiment, specifically, the limiting component 500 includes a limiting post 510 and a slot 520. The first left side plate 110 and the first right side plate 120 are both vertically fixed with the limiting post 510, which extends in the left and right direction. The second left side plate 210 and the second right side plate 220 are both provided with slots 520. In the open position, the opening of the slot 520 faces downward to engage with the limiting post 510 on the corresponding side.

[0064] This configuration of the limiting component 500 not only enables reliable limiting of the movable cover 200, but also features a simple structure and low cost.

[0065] In this embodiment, the limiting post 510 is fitted with a buffer sleeve to buffer the impact force when the slot 520 is inserted into the limiting post 510.

[0066] Please continue to refer to Figure 6 In this embodiment, both the second left side plate 210 and the second right side plate 220 are provided with weight reduction holes 230.

[0067] By opening weight-reducing holes 230 in the second left side plate 210 and the second right side plate 220, the weight of the movable cover 200 can be reduced. On the one hand, this improves the rotation flexibility of the movable cover 200, and on the other hand, it reduces the force required to rotate the movable cover 200, thereby reducing labor intensity.

[0068] In this embodiment, the fixed cover 100 can be made of metal (such as aluminum alloy or stainless steel) to improve corrosion resistance and ensure structural strength; the movable cover 200 can be made of high-strength transparent material (such as plexiglass or polycarbonate) to facilitate observation of the working status of the precision instrument 010.

[0069] Please continue to refer to Figure 1 and Figure 7 In this embodiment, both the first left side plate 110 and the first right side plate 120 are provided with mounting openings 160, and each mounting opening 160 is fitted with a handle 150, wherein the handle 150 has a concave hand-holding groove.

[0070] The handle 150 facilitates the handling of the protective device, thereby improving its portability. Furthermore, the handle 150, with its recessed grip groove, does not occupy space around the protective device, contributing to a more compact structure.

[0071] Please continue to refer to Figure 1 In this embodiment, the protective device may further include a sealing ring 600, wherein the sealing ring 600 is fixedly disposed in the bottom opening along the circumference of the bottom opening.

[0072] This design allows the protective device to make tight contact with the platform at the bottom through the sealing ring 600, preventing noise and dust from entering the inner cavity through the gap between the platform and the fixed cover 100. This ensures that the precision instrument 010 is not affected by external vibrations or noise during operation, resulting in more accurate and stable test results.

[0073] Please continue to refer to Figure 1 In this embodiment, the movable cover 200 may also include a handle 240, wherein the handle 240 is fixedly disposed on the arc-shaped sealing plate 260, and in the open position, the handle 240 is located at the top of the arc-shaped sealing plate 260.

[0074] The aforementioned handle 240 provides the operator with a point of leverage to apply force to the movable cover 200, facilitating the application of rotational force. Furthermore, the aforementioned placement of the handle 240 reduces its impact on the rotational stroke of the movable cover 200, thereby maximizing the exposure of the operating opening 1331.

[0075] In this embodiment, a sound insulation layer is fixedly provided on the inner surface of the fixed cover 100.

[0076] The aforementioned sound insulation layer reduces the entry of external vibrations and noise, enabling the precision instrument 010 to accurately and stably view the sample from the side.

[0077] Specifically, the sound insulation layer can be glued to the inner surface of the fixed cover 100.

[0078] The procedure for using this protective device is as follows.

[0079] When protection is needed for the precision instrument 010 mounted on the platform, the operator can hold the handles 150 on both sides of the fixed cover 100 with both hands to cover the precision instrument 010 from above, ensuring that the sealing ring 600 on the bottom of the fixed cover 100 is tightly against the platform surface, thus protecting the precision instrument 010. When it is necessary to use the precision instrument 010 to test a sample, the handle 240 can be used to apply an upward rotational force to the movable cover 200, causing the movable cover 200 to rotate backward along its own curvature, opening the operating port 1331. When the movable cover 200 rotates to... After positioning, the slot 520 of the movable cover 200 will engage with the limiting post 510 of the fixed cover 100 to limit the movable cover 200 and keep it in the open position. When testing the sample using the precision instrument 010, the handle 240 can be used to apply a downward rotational force to the movable cover 200, causing it to rotate forward along its own curvature and close the operating port 1331. When the movable cover 200 is closed, the first magnetic suction member 310 and the second magnetic suction member 320 will magnetically attract each other to keep the movable cover 200 in the closed position. The sound insulation layer attached to the inner surface of the fixed cover 100 isolates external noise, preventing external sound from affecting the sample testing.

[0080] Example 2

[0081] This embodiment provides another protective device, which differs from the protective device provided in Embodiment 1 as described below.

[0082] Figure 9 This is a partial structural schematic diagram of the protective device provided in Embodiment 2. Figure 9As shown, in this embodiment, the handle 150 has a U-shaped structure and is directly fixed to the first left side plate 110 and the first right side plate 120.

[0083] The design of the handle 150 is simple in structure and inexpensive.

[0084] Figure 10 for Figure 9 A magnified view of the local structure at point C. (See image below.) Figure 10 As shown, in this embodiment, the rotating assembly 400 includes a fixed base 450 and a fixed shaft 440. The first left side plate 110 and the first right side plate 120 are both fixedly provided with fixed bases 450. The fixed shaft 440 is vertically fixed to the fixed base 450 and extends in the left and right direction. The movable cover 200 is loosely fitted onto the rotating shafts on both sides through the rotating holes 250 opened in the second left side plate 210 and the second right side plate 220.

[0085] This setup also allows for the rotating installation of the movable cover 200 inside the fixed cover 100, and the structure is simple.

[0086] Figure 11 for Figure 9 A magnified view of the local structure at point D. (See image.) Figure 11 As shown, in this embodiment, the arc-shaped sealing plate 260 is provided with a pull pin 260 and a return spring 270. The pull pin 260 is pluggably installed on the front plate portion 132, and the return spring 270 is connected between the pull pin 260 and the front plate portion 132 to ensure that the pull pin 260 always has a tendency to move toward the inner cavity of the fixed cover 100. The arc-shaped sealing plate 260 has a locking hole corresponding to the position of the pull pin 260. In the closed position of the movable cover 200, the pull pin 260 can extend into the locking hole of the arc-shaped sealing plate 260.

[0087] When it is necessary to keep the movable cover 200 in the closed position, the pull pin 260 can be pulled first to disengage the pull pin 260 from the movement path of the arc-shaped sealing plate 260. When the movable cover 200 rotates to make the arc-shaped sealing plate 260 in the closed position, the locking hole provided in the arc-shaped sealing plate 260 will be opposite to the pull pin 260. At this time, under the elastic restoring force of the return spring 270, the tension spring will extend into the locking hole opened in the arc-shaped sealing plate 260, thereby locking the position of the movable cover 200.

[0088] This method of locking the movable cover 200 in the closed position by using the cooperation of the pull pin 260 and the return spring 270 can only unlock the movable cover 200 after the operator pulls out the pull pin 260, thus avoiding accidental opening of the movable cover 200.

[0089] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

[0090] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the term "comprising" or any other variations thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0091] In the above embodiments, descriptions of directions such as "left", "right", "front", "rear", and "side" are all based on the accompanying drawings.

[0092] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A protective device, characterized in that, include: A fixed cover (100) with a bottom opening includes a first left side plate (110), a first right side plate (120), a front side plate (130), and a rear side plate (140). The front side plate (130) includes a top plate portion (131), a front plate portion (132), and an arc-shaped plate portion (133) located between the top plate portion (131) and the front plate portion (132). The arc-shaped plate portion (133) arches away from the inner cavity of the fixed cover (100), and the arc-shaped plate portion (133) has an operating port (1331) communicating with the inner cavity. A movable cover (200) is pivotally mounted inside the fixed cover (100) and includes an arc-shaped sealing plate (260) whose curvature matches that of the arc-shaped plate portion (133). The arc-shaped sealing plate (260) has a closed position that closes the operating port (1331) and an open position that exposes the operating port (1331). as well as A locking component (300) is disposed between the movable cover (200) and the fixed cover (100) for holding the movable cover (200) in the closed position.

2. The protective device according to claim 1, characterized in that, The movable cover (200) further includes a second left side plate (210) and a second right side plate (220). The arc-shaped sealing plate (260) is fixedly connected between the second left side plate (210) and the second right side plate (220). A rotating assembly (400) is provided between the second left side plate (210) and the first left side plate (110) and between the second right side plate (220) and the first right side plate (120). The rotating assembly (400) is configured to pivotally mount the movable cover (200) onto the fixed cover (100).

3. The protective device according to claim 2, characterized in that, The locking assembly (300) includes a first magnetic member (310) and a second magnetic member (320) that magnetically engage. The first magnetic member (310) is located in the inner cavity, and at least one of the first left side plate (110) and the first right side plate (120) is provided with the first magnetic member (310). The second magnetic member (320) is fixedly disposed on at least one of the second left side plate (210) and the second right side plate (220), and the position of the second magnetic member (320) matches the position of the first magnetic member (310).

4. The protective device according to claim 3, characterized in that, At least one of the first left side plate (110) and the first right side plate (120) is vertically fixed with an internally threaded post (330), the internally threaded post (330) extending in the left-right direction; the locking assembly (300) further includes a rubber sleeve (340) and a fastening screw (350), wherein the rubber sleeve (340) is open at both ends and is fitted onto the internally threaded post (330); the first magnetic attractor (310) has a fixing hole, the fixing hole is fitted into the internally threaded post (330) and abuts against the end face of the rubber sleeve (340), and the fastening screw (350) is screwed onto the internally threaded post (330) and abuts against the first magnetic attractor (310).

5. The protective device according to claim 4, characterized in that, At least one of the first left side plate (110) and the first right side plate (120) is vertically fixed with two internal threaded posts (330), and the two internal threaded posts (330) are arranged at intervals in the front-back direction; the first magnetic suction member (310) has two fixing holes, and the two fixing holes are respectively fitted into the two internal threaded posts (330) one by one.

6. The protective device according to claim 2, characterized in that, The protective device further includes a limiting component (500) for holding the movable cover (200) in the open position.

7. The protective device according to claim 6, characterized in that, The limiting component (500) includes a limiting post (510) and a slot (520). The first left side plate (110) and the first right side plate (120) are both vertically fixed with the limiting post (510), and the limiting post (510) extends in the left-right direction. The second left side plate (210) and the second right side plate (220) are both provided with the slot (520). In the open position, the opening of the slot (520) faces downward so as to engage with the limiting post (510) on the corresponding side.

8. The protective device according to claim 2, characterized in that, The second left side plate (210) and the second right side plate (220) are both provided with weight reduction holes (230).

9. The protective device according to claim 2, characterized in that, The rotating assembly (400) includes a bearing housing (410), a rotating bearing (420), and a bearing rod (430). The first left side plate (110) and the first right side plate (120) are both fixedly provided with the bearing housing (410). The bearing rod (430) is fixedly provided with the bearing housing (410) and extends in the left-right direction. The inner ring of the rotating bearing (420) is fixedly fitted onto the bearing rod (430). The second left side plate (210) and the second right side plate (220) are fixedly fitted onto the outer ring of the rotating bearing (420) on the corresponding side.

10. The protective device according to claim 1, characterized in that, The first left side plate (110) and the first right side plate (120) are each provided with an installation port (160), and each installation port (160) is fitted with a handle (150), the handle (150) being provided with a concave handle groove; and / or, the protective device further includes a sealing ring (600), the sealing ring (600) being fixedly disposed in the bottom opening along the circumference of the bottom opening; and / or, the movable cover (200) further includes a handle (240), the handle (240) being fixedly disposed in the arc-shaped sealing plate (260), and in the open position, the handle (240) being located at the top of the arc-shaped sealing plate (260); and / or, the inner surface of the fixed cover (100) is fixedly provided with a sound insulation layer.

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