Access hole opening and closing mechanism

Abstract

The utility model relates to an access hole opening and closing mechanism which comprises a frame, a cover plate and a connecting assembly. The connecting assembly comprises an inserting part and a swinging part. And a transverse groove is formed in the inserting part. And the first end of the swinging part is rotationally inserted into the transverse groove. The frame can be inserted into and connected with the access hole. The corner end of the frame is fixedly connected with the inserting part. The cover plate is rotationally connected with the swing part second end. When the first end of the swing part is located at the second end of the transverse groove, the cover plate can cover the access hole in parallel. When the first end of the swing part is located at the first end of the transverse groove, the cover plate can rotate around the second end of the swing part in the direction close to or away from the access opening to be parallel to or perpendicular to the access opening, and the cover plate and the swing part can synchronously rotate around the first end of the transverse groove in the direction close to or away from the access opening to be parallel to or perpendicular to the access opening. The cover plate can open the access hole in parallel up and down, and the cover plate is turned over by 180 degrees; or the cover plate is relatively parallel to the access hole at intervals, so that the cover plate can move to the second end of the transverse groove along the transverse groove along with the swinging part again.

Description

Technical Field

[0001] The utility model relates to the technical field of inspection openings, in particular to an opening and closing mechanism for an inspection opening. Background Art

[0002] Prefabricated buildings are vigorously promoted due to their high construction efficiency, reliable construction quality and superior economic benefits. Among them, the walls surrounding various pipelines in prefabricated buildings generally reserve inspection openings for later inspection and maintenance, and a cover plate for opening and closing the inspection opening is arranged on the inspection opening. Conventional cover plates generally adopt hinges or hinges, which can only be flipped 90° relative to the inspection opening to be flush with one end of the inspection opening. Therefore, the cover plate in the open state will block a part of the inspection opening, resulting in a small operating space at the inspection opening with a small size, increasing the difficulty of inspection. Summary of the Utility Model

[0003] (1) Technical Problems to be Solved

[0004] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides an opening and closing mechanism for an inspection opening, which solves the technical problem that the existing cover plate can only be flipped 90° relative to the inspection opening, resulting in a small operating space.

[0005] (2) Technical Solutions

[0006] In order to achieve the above object, the main technical solutions adopted by the utility model include:

[0007] An embodiment of the utility model provides an opening and closing mechanism for an inspection opening, which includes a frame and a cover plate, and further includes a connection component; the connection component includes a plugging part and a swinging part; a transverse groove is formed on the plugging part, and the first end of the transverse groove is close to the cover plate; the first end of the swinging part is rotatably plugged in the transverse groove; the frame can be inserted and connected to the inspection opening, and the corner end of the frame is fixedly connected to the plugging part; the cover plate is rotatably connected to the second end of the swinging part;

[0008] When the first end of the swinging part is located at the second end of the transverse groove, the cover plate can cover the inspection opening in parallel;

[0009] When the first end of the swinging part is located at the first end of the transverse groove, the cover plate can rotate around the second end of the swinging part towards or away from the inspection opening to be parallel or perpendicular to the inspection opening, and the cover plate can also rotate around the first end of the transverse groove towards or away from the inspection opening in synchronization with the swinging part to be parallel or perpendicular to the inspection opening, so that the cover plate can open the inspection opening parallelly up and down or be spaced parallelly relative to the inspection opening.

[0010] According to the utility model, the first end of the transverse groove extends downward to form a first limiting groove;

[0011] An arc groove is further formed in the insertion part; the arc groove is recessed towards the cover plate, the upper end of the arc groove communicates with the transverse groove, the lower end of the arc groove is flush with the second end of the transverse groove, and the lower end of the arc groove extends downward to form a second limiting groove;

[0012] A first rotating body and a second rotating body are arranged at intervals at the first end of the swinging part, and the first rotating body and the second rotating body are rotationally inserted into the transverse groove and the arc groove;

[0013] When the first rotating body and the second rotating body are located at the second end of the transverse groove, the cover plate can be parallel and cover the inspection opening;

[0014] When the first rotating body and the second rotating body are located at the first end of the transverse groove, the second rotating body is closer to the cover plate; the cover plate can rotate around the second end of the swinging part towards or away from the inspection opening to be parallel or perpendicular to the inspection opening, and the cover plate and the swinging part can also rotate around the second rotating body towards or away from the frame synchronously and the first rotating body moves along the arc groove, so that the cover plate can open the inspection opening parallel up and down or be parallel and spaced relative to the inspection opening;

[0015] When the cover plate opens the inspection opening parallel up and down, the cover plate and the swinging part can move up and down synchronously until the first rotating body is inserted into the first limiting groove and the second rotating body is inserted into the second limiting groove, so that the cover plate is in a locked state; or, the first rotating body is located in the transverse groove and the second rotating body is located in the arc groove, so that the cover plate is in an unlocked state.

[0016] According to the present invention, the swinging part is L-shaped.

[0017] According to the present invention,

[0018] The swinging part includes two L-shaped plate bodies arranged in parallel at intervals, and the first ends of the two plate bodies are rotatably connected to the first rotating body and the second rotating body arranged at intervals.

[0019] According to the present invention, the second ends of the two plate bodies are rotatably connected to a third rotating body;

[0020] The inspection opening opening and closing mechanism further includes a connecting plate;

[0021] The connecting plate is L-shaped, one right-angled surface of the connecting plate is attached to and fixed on the cover plate, and a jack is formed on the other right-angled surface of the connecting plate;

[0022] The third rotating body is rotationally inserted into the jack.

[0023] According to the present utility model, the first rotating body, the second rotating body, and the third rotating body are all rotating shafts.

[0024] According to the present utility model, the cover plate includes a mounting plate and a decorative plate, and both side surfaces of the mounting plate are fixedly connected to the connecting plate and the decorative plate respectively.

[0025] According to the present utility model, it further includes a metal rebounder;

[0026] The main body of the metal rebounder is arranged inside the frame, and the opening and closing end of the metal rebounder can be elastically magnetically connected to one side of the cover plate close to the inspection opening;

[0027] When the cover plate is parallel and covers the inspection opening, pressing the cover plate, the locking and pushing end of the metal rebounder is magnetically connected to the cover plate;

[0028] When it is necessary to open the inspection opening, pressing the cover plate, the metal rebounder can push the cover plate away from the inspection opening.

[0029] According to the present utility model, the number of the insertion parts, the swing parts, and the metal rebounders is two;

[0030] The two insertion parts and the two metal rebounders are relatively arranged on both sides of the frame, and the two insertion parts and the two swing parts are arranged in one-to-one correspondence.

[0031] According to the present utility model, the frame and the cover plate are both rectangular;

[0032] The insertion part is arranged at the corner end of the inner peripheral wall of the frame;

[0033] The swing part is located inside the frame.

[0034] (III) Beneficial effects

[0035] The beneficial effects of the present utility model are as follows: For the inspection opening opening and closing mechanism of the present utility model, the frame inserted and connected to the inside of the inspection opening and the cover plate are connected through a connection component. When the cover plate moves along the transverse groove to the second end of the transverse groove along with the swing part, the cover plate is parallel and covers the inspection opening. When the cover plate is in the state of being opened vertically and parallel to the inspection opening, the cover plate is flipped 180° relative to the inspection opening, and there is no obstruction around the inspection opening, expanding the operation space at the inspection opening for easy maintenance. When the cover plate is in the state of being relatively parallel and spaced apart from the inspection opening, the cover plate can move along the transverse groove to the second end of the transverse groove again along with the swing part to be parallel and cover the inspection opening. Description of the drawings

[0036] Figure 1Isometric schematic view when the cover plate closes the inspection opening in the opening and closing mechanism of the inspection opening of the present utility model;

[0037] Figure 2 Is Figure 1 Exploded schematic view;

[0038] Figure 3 Exploded schematic view of the connection assembly;

[0039] Figure 4 Is Figure 1 Side view;

[0040] Figure 5 Schematic view when the cover plate closes the inspection opening in parallel;

[0041] Figure 6 Schematic view when the first end of the cover plate is located at the first end of the transverse groove;

[0042] Figure 7 Schematic view when the cover plate rotates away from the inspection opening around the second end of the swinging part until it is perpendicular to the inspection opening;

[0043] Figure 8 Schematic view when the cover plate opens the inspection opening up and down in parallel;

[0044] Figure 9 Schematic view when the cover plate is in the locked state.

[0045]

Explanation of reference numerals in the drawings

[0046] 1: Frame; 11: Connection hole;

[0047] 2: Cover plate; 21: Mounting plate; 22: Decorative plate;

[0048] 3: Connection assembly; 31: Insertion part; 311: Slot; 3111: Transverse groove; 3112: Arc groove; 3113: First limiting groove; 3114: Second limiting groove; 312: First connection point; 32: Swinging part; 321: Plate body; 322: First rotating body; 323: Second rotating body; 324: Third rotating body;

[0049] 4: Connection plate; 41: Insertion hole; 411: Second connection point;

[0050] 5: Metal rebounder. Detailed implementation manners

[0051] For better explaining the present utility model for easy understanding, the present utility model will be described in detail below with reference to the drawings through specific implementation manners. Among them, the orientation nouns such as "upper" and "lower" mentioned in this article are referenced with the orientation of the figure.

[0052] See Figures 1-9, the access opening opening and closing mechanism proposed by the embodiment of the present utility model includes a frame 1 and a cover plate 2, and further includes a connection assembly 3. The connection assembly 3 includes a plug-in portion 31 and a swing portion 32. A slot 311 is formed on the plug-in portion 31, and the slot 311 includes a horizontal slot 3111, and the first end of the horizontal slot 3111 is close to the cover plate 2. The first end of the swing portion 32 is rotatably inserted into the horizontal slot 3111. The frame 1 can be inserted and connected to the access opening, and the corner ends of the frame 1 are fixedly connected to the plug-in portion 31. The cover plate 2 is rotatably connected to the second end of the swing portion 32.

[0053] When the first end of the swing portion 32 is located at the second end of the horizontal slot 3111, the cover plate 2 can cover the access opening in parallel.

[0054] When the first end of the swing portion 32 is located at the first end of the horizontal slot 3111, the cover plate 2 can rotate around the second end of the swing portion 32 towards or away from the access opening to be parallel or perpendicular to the access opening, and the cover plate 2 can also rotate synchronously with the swing portion 32 around the first end of the horizontal slot 3111 towards or away from the access opening to be parallel or perpendicular to the access opening, so that the cover plate 2 can open the access opening in parallel up and down or be spaced parallel to the access opening relatively.

[0055] Among them, when the cover plate 2 is in the state of opening the access opening in parallel up and down, the cover plate 2 is flipped ° relative to the access opening, and there is no occlusion around the access opening, expanding the operation space at the access opening for easy maintenance. When the cover plate 2 is in the state of being spaced parallel to the access opening relatively, the cover plate 2 can move along the horizontal slot 3111 to the second end of the horizontal slot 3111 again with the swing portion 32 to cover the access opening in parallel.

[0056] Optionally, when the cover plate 2 is in the state of opening the access opening in parallel up and down, the cover plate 2 is flipped up, down, left or right ° relative to the access opening to adapt to the working conditions. Preferably, the cover plate 2 can be flipped up ° relative to the access opening to facilitate opening and closing the access opening.

[0057] It should be noted that when the first end of the swing portion 32 is located at the first end of the horizontal slot 3111, the operation method for the cover plate 2 to open the access opening in parallel up and down is as follows:

[0058] After the cover plate 2 rotates around the second end of the swing portion 32 away from the access opening to be perpendicular to the access opening, the cover plate 2 and the swing portion 32 rotate synchronously around the first end of the horizontal slot 3111 away from the access opening to be parallel to the access opening; or,

[0059] After the cover plate 2 and the swing portion 32 rotate synchronously around the first end of the horizontal slot 3111 away from the access opening to be perpendicular to the access opening, the cover plate 2 rotates around the second end of the swing portion 32 away from the access opening to be parallel to the access opening.

[0060] When the first end of the swing part 32 is located at the first end of the horizontal groove 3111, the cover plate 2 switches from opening the inspection port in an up-and-down parallel manner to operating in a relatively parallel and spaced manner with respect to the inspection port as follows:

[0061] After the cover plate 2 and the swing part 32 rotate synchronously around the first end of the horizontal groove 3111 towards the inspection port until they are perpendicular to the inspection port, the cover plate 2 rotates around the second end of the swing part 32 towards the inspection port until it is parallel to the inspection port; or,

[0062] After the cover plate 2 rotates around the second end of the swing part 32 towards the inspection port until it is perpendicular to the inspection port, the cover plate 2 and the swing part 32 rotate synchronously around the first end of the horizontal groove 3111 towards the inspection port until they are parallel to the inspection port.

[0063] Furthermore, the first end of the horizontal groove 3111 extends downward to form a first limiting groove 3113.

[0064] An arc groove 3112 is also formed on the insertion part 31. The arc groove 3112 is recessed towards the cover plate 2. The upper end of the arc groove 3112 communicates with the horizontal groove 3111. The lower end of the arc groove 3112 is flush with the second end of the horizontal groove 3111. The lower end of the arc groove 3112 extends downward to form a second limiting groove 3114.

[0065] The first end of the swing part 32 is provided with a first rotating body 322 and a second rotating body 323 at intervals. The first rotating body 322 and the second rotating body 323 are rotationally inserted into the horizontal groove 3111 and the arc groove 3112.

[0066] When the first rotating body 322 and the second rotating body 323 are located at the second end of the horizontal groove 3111, the cover plate 2 can be parallel and cover the inspection port.

[0067] When the first rotating body 322 and the second rotating body 323 are located at the first end of the horizontal groove 3111, the second rotating body 323 is closer to the cover plate 2. The cover plate 2 can rotate around the second end of the swing part 32 towards or away from the inspection port until it is parallel or perpendicular to the inspection port. The cover plate 2 and the swing part 32 can also rotate synchronously around the second rotating body 323 towards or away from the frame 1 and the first rotating body 322 moves along the arc groove 3112, so that the cover plate 2 can open the inspection port in an up-and-down parallel manner or be relatively parallel and spaced with respect to the inspection port.

[0068] When the cover plate 2 opens the inspection port in an up-and-down parallel manner:

[0069] The cover plate 2 and the swing part 32 can move up and down synchronously until the first rotating body 322 is inserted into the first limiting groove 3113 and the second rotating body 323 is inserted into the second limiting groove 3114, so that the cover plate 2 is in a locked state to limit the cover plate 2 and maintain the state of the cover plate 2 opening the inspection port in an up-and-down parallel manner; or,

[0070] The first rotating body 322 is located within the transverse groove 3111 and the second rotating body 323 is located within the arc groove 3112, such that the cover plate 2 is in an unlocked state and the position of the cover plate 2 can be changed.

[0071] It should be noted that when the first rotating body 322 and the second rotating body 323 are located at the first end of the transverse groove 3111, the operation mode for the cover plate 2 to maintain the up-and-down parallel opening of the inspection port is as follows:

[0072] After the cover plate 2 rotates around the second end of the swinging portion 32 in a direction away from the inspection port until it is perpendicular to the inspection port, the cover plate 2 and the swinging portion 32 synchronously rotate around the second rotating body 323 in a direction away from the frame 1 and the first rotating body 322 moves along the arc groove 3112 until the cover plate 2 opens the inspection port in an up-and-down parallel manner. Subsequently, the cover plate 2 and the swinging portion 32 synchronously move downward until the first rotating body 322 is inserted into the first limiting groove 3113 and the second rotating body 323 is inserted into the second limiting groove 3114; or,

[0073] The cover plate 2 and the swinging portion 32 synchronously rotate around the second rotating body 323 in a direction away from the frame 1 and the first rotating body 322 moves along the arc groove 3112 until the cover plate 2 is perpendicular to the inspection port. Then, the cover plate 2 rotates around the second end of the swinging portion 32 in a direction away from the inspection port until the cover plate 2 opens the inspection port in an up-and-down parallel manner. Subsequently, the cover plate 2 and the swinging portion 32 synchronously move up and down until the first rotating body 322 is inserted into the first limiting groove 3113 and the second rotating body 323 is inserted into the second limiting groove 3114.

[0074] It should be noted that the operation mode for the cover plate 2 to switch from maintaining the up-and-down parallel opening of the inspection port to being relatively parallel and spaced apart from the inspection port is as follows:

[0075] After the cover plate 2 and the swinging portion 32 synchronously move upward until the first rotating body 322 is located within the transverse groove 3111 and the second rotating body 323 is located within the arc groove 3112, the cover plate 2 rotates around the second end of the swinging portion 32 in a direction close to the inspection port until it is perpendicular to the inspection port. Then, the cover plate 2 and the swinging portion 32 synchronously rotate around the second rotating body 323 in a direction close to the frame 1 and the first rotating body 322 moves along the arc groove 3112 until the cover plate 2 is relatively parallel and spaced apart from the inspection port; or,

[0076] After the cover plate 2 and the swinging portion 32 synchronously move upward until the first rotating body 322 is located within the transverse groove 3111 and the second rotating body 323 is located within the arc groove 3112, the cover plate 2 and the swinging portion 32 synchronously rotate around the second rotating body 323 in a direction close to the frame 1 and the first rotating body 322 moves along the arc groove 3112 until the cover plate 2 is perpendicular to the inspection port. Then, the cover plate 2 rotates around the second end of the swinging portion 32 in a direction close to the inspection port until the cover plate 2 is relatively parallel and spaced apart from the inspection port.

[0077] Further, the swinging part 32 is L-shaped to make way for the cover plate 2 when the cover plate 2 rotates around the second end of the swinging part 32, and can also stably support the cover plate 2.

[0078] Specifically, the swinging part 32 includes two L-shaped plate bodies 321 arranged in parallel at intervals. The first ends of the two plate bodies 321 are rotatably connected to a first rotating body 322 and a second rotating body 323 arranged at intervals. The first rotating body 322 and the second rotating body 323 are stably supported by the two plate bodies 321, and the weight of the swinging part 32 can be reduced.

[0079] More specifically, the first rotating body 322 and the second rotating body 323 pass through the ends of the slot 311 and are connected with limit pieces to prevent them from detaching from the slot 311. Preferably, the limit piece is a nut.

[0080] Further, the second ends of the two plate bodies 321 are rotatably connected to a third rotating body 324, and the third rotating body 324 is used for rotatably connecting the cover plate 2.

[0081] Specifically, the first rotating body 322, the second rotating body 323 and the third rotating body 324 are all rotating shafts and are all rotatably connected to the two plate bodies 321 through bearings.

[0082] Further, the inspection port opening and closing mechanism further includes a connecting plate 4.

[0083] The connecting plate 4 is L-shaped. One right-angled surface of the connecting plate 4 is attached to and fixed on the cover plate 2, and a jack 41 is opened on the other right-angled surface of the connecting plate 4.

[0084] The third rotating body 324 is rotatably inserted into the jack 41 so that the cover plate 2 is rotatably connected to the second end of the swinging part 32.

[0085] Specifically, the connecting plate 4 is welded or bolted to the cover plate 2.

[0086] Further, the cover plate 2 includes a mounting plate 21 and a decorative plate 22.

[0087] The two side surfaces of the mounting plate 21 are respectively fixedly connected to the connecting plate 4 and the decorative plate 22. The mounting plate 21 is used for fixedly connecting the connecting plate 4. The connecting surface between the mounting plate 21 and the decorative plate 22 is a plane, so that the decorative plate 22 can be set to be the same as the material color around the inspection port, improving the aesthetics of the cover plate 2.

[0088] Further, the inspection port opening and closing mechanism further includes a metal bumper 5.

[0089] The main body of the metal bumper 5 is arranged inside the frame 1, and the opening and closing end of the metal bumper 5 can elastically magnetically connect to one side of the cover plate 2 close to the inspection port.

[0090] When the cover plate 2 is parallel and covers the inspection opening, press the cover plate 2, and the locking and pushing end of the metal rebounder 5 magnetically connects to the cover plate 2 to lock the cover plate 2. When it is necessary to open the inspection opening, press the cover plate 2, and the metal rebounder 5 can push the cover plate 2 away from the inspection opening.

[0091] By arranging the metal rebounder 5 inside the frame 1 to lock the cover plate 2, it is possible to avoid the leakage of the locking mechanism and affect the aesthetics of the cover plate 2. At the same time, pressing the metal rebounder 5 can also assist in dragging the cover plate 2 away from the inspection opening, reducing the opening force when opening the inspection opening.

[0092] It should be noted that the metal rebounder 5 is a conventional mechanism and will not be elaborated here.

[0093] Furthermore, the number of the insertion parts 31, the swing parts 32, and the metal rebounders 5 is two each.

[0094] The two insertion parts 31 and the two metal rebounders 5 are oppositely arranged on both sides of the frame 1, and the two insertion parts 31 and the two swing parts 32 are arranged in one-to-one correspondence.

[0095] By arranging two insertion parts 31, swing parts 32, and metal rebounders 5, the connection stability between the cover plate 2 and the inner frame is improved, and the locking strength for the cover plate 2 can be enhanced.

[0096] Preferably, both the frame 1 and the cover plate 2 are rectangular.

[0097] The insertion part 31 is arranged at the corner end of the inner peripheral wall of the frame 1, and the swing part 32 is hidden inside the frame 1 to avoid the leakage of the connection assembly 3 and affect the flatness of the cover plate 2, thereby affecting its aesthetics.

[0098] Specifically, the insertion part 31 is welded or threadedly connected to the frame 1.

[0099] Specifically, a plurality of connection holes 11 are also formed on the frame 1, and a screw can be passed through the connection hole 11 to fix the frame 1 to the inner wall of the inspection opening to hide the frame 1.

[0100] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0101] In the present utility model, unless otherwise clearly specified and defined, a first feature being "on" or "under" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact via an intermediate medium. Moreover, a first feature being "above", "over" and "on top of" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature has a higher horizontal height than the second feature. A first feature being "under", "below" and "beneath" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature has a lower horizontal height than the second feature.

[0102] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples", etc., mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0103] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present utility model.

Claims

1. A maintenance opening opening and closing mechanism, comprising a frame (1) and a cover plate (2), characterized in that: It also comprises a connection assembly (3); the connection assembly (3) comprises a plug-in portion (31) and a swing portion (32); a transverse groove (3111) is provided on the plug-in portion (31), and a first end of the transverse groove (3111) is close to the cover plate (2); the first end of the swing portion (32) is rotatably plugged into the transverse groove (3111); the frame (1) can be inserted into and connected to the inspection port, and an angle end of the frame (1) is fixedly connected to the plug-in portion (31); the cover plate (2) is rotatably connected to the second end of the swing portion (32); When the first end of the swinging portion (32) is located at the second end of the transverse groove (3111), the cover plate (2) can cover the inspection opening in parallel; When the first end of the swinging portion (32) is located at the first end of the transverse groove (3111), the cover plate (2) can rotate around the second end of the swinging portion (32) in a direction close to or away from the inspection port until it is parallel or perpendicular to the inspection port. The cover plate (2) can also rotate around the first end of the transverse groove (3111) in a direction close to or away from the inspection port until it is parallel or perpendicular to the inspection port synchronously with the swinging portion (32), so that the cover plate (2) can open the inspection port in parallel up and down or be relatively parallel and spaced from the inspection port.

2. The inspection opening opening and closing mechanism according to claim 1, characterized in that: The first end of the transverse groove (3111) extends downward to form a first limiting groove (3113); The plug-in portion (31) is also provided with an arc groove (3112); the arc groove (3112) is recessed toward the cover plate (2); the upper end of the arc groove (3112) is connected to the transverse groove (3111); the lower end of the arc groove (3112) is flush with the second end of the transverse groove (3111); and the lower end of the arc groove (3112) extends downward to form a second limiting groove (3113); A first rotating body (322) and a second rotating body (323) are arranged at a first end of the swinging portion (32) at intervals, and the first rotating body (322) and the second rotating body (323) are rotatably inserted into the transverse groove (3111) and the arc groove (3112); When the first rotating body (322) and the second rotating body (323) are located at the second end of the transverse groove (3111), the cover plate (2) can be parallel to and cover the inspection opening; When the first rotating body (322) and the second rotating body (323) are located at the first end of the transverse groove (3111), the second rotating body (323) is closer to the cover plate (2); the cover plate (2) can rotate around the second end of the swinging part (32) in a direction close to or away from the inspection opening until it is parallel or perpendicular to the inspection opening, and the cover plate (2) and the swinging part (32) can also rotate synchronously around the second rotating body (323) in a direction close to or away from the frame (1) and the first rotating body (322) moves along the arc groove (3112), so that the cover plate (2) can open the inspection opening in parallel up and down or be relatively parallel and spaced from the inspection opening; When the cover plate (2) opens the inspection port in parallel up and down, the cover plate (2) and the swinging portion (32) can move up and down synchronously until the first rotating body (322) is inserted into the first limiting groove (3113) and the second rotating body (323) is inserted into the second limiting groove (3113), so that the cover plate (2) is in a locked state; or, the first rotating body (322) is located in the transverse groove (3111) and the second rotating body (323) is located in the arc groove (3112), so that the cover plate (2) is in an unlocked state.

3. A maintenance opening opening and closing mechanism as claimed in claim 2, characterized in that: The swinging portion (32) is L-shaped.

4. The inspection opening opening and closing mechanism according to claim 3, characterized in that: The swinging portion (32) comprises two L-shaped plates (321) arranged in parallel and at intervals, and the first ends of the two plates (321) are rotatably connected to the first rotating body (322) and the second rotating body (323) arranged at intervals.

5. The inspection opening opening and closing mechanism according to claim 4, characterized in that: The second ends of the two plates (321) are rotatably connected to a third rotating body (324); The inspection port opening and closing mechanism also includes a connecting plate (4); The connecting plate (4) is L-shaped, one right-angled surface of the connecting plate (4) is attached to and fixed on the cover plate (2), and another right-angled surface of the connecting plate (4) is provided with a plug hole (41); The third rotating body (324) is rotatably inserted into the insertion hole (41).

6. The inspection opening opening and closing mechanism according to claim 5, characterized in that: The first rotating body (322), the second rotating body (323) and the third rotating body (324) are all rotating shafts.

7. The inspection opening opening and closing mechanism according to claim 5, characterized in that: The cover plate (2) comprises a mounting plate (21) and a decorative plate (22), and two side surfaces of the mounting plate (21) are respectively fixedly connected to the connecting plate (4) and the decorative plate (22).

8. The inspection opening opening and closing mechanism according to claim 1, characterized in that: Also includes a metal rebounder (5); The main body of the metal rebounder (5) is arranged inside the frame (1), and the opening and closing end of the metal rebounder (5) can be elastically magnetically connected to the side of the cover plate (2) close to the inspection port; When the cover plate (2) is parallel to and covers the inspection opening, the cover plate (2) is pressed, and the locking push end of the metal rebounder (5) is magnetically connected to the cover plate (2); When the inspection opening needs to be opened, the cover plate (2) is pressed, and the metal rebounder (5) can push the cover plate (2) away from the inspection opening.

9. The inspection opening opening and closing mechanism according to claim 8, characterized in that: The number of the plug-in portion (31), the swing portion (32) and the metal rebounder (5) is two; The two plug-in parts (31) and the two metal rebounders (5) are arranged on both sides of the frame (1) in a relative manner, and the two plug-in parts (31) and the two swing parts (32) are arranged in a one-to-one correspondence.

10. The inspection opening opening and closing mechanism according to claim 1, characterized in that: The frame (1) and the cover plate (2) are both rectangular; The plug-in portion (31) is arranged at a corner end of the inner peripheral wall of the frame (1); The swinging portion (32) is located inside the frame.

Images