CN211970506U

CN211970506U - Buried garbage collection device

Info

Publication number: CN211970506U
Application number: CN202020138048.XU
Authority: CN
Inventors: 周建江; 李元明; 曾方跃; 彭湘媛
Original assignee: Shenzhen Fengfan Environmental Protection Technology Co ltd
Current assignee: Shenzhen Fengfan Environmental Protection Technology Co ltd
Priority date: 2020-01-20
Filing date: 2020-01-20
Publication date: 2020-11-20
Anticipated expiration: 2030-01-20

Abstract

The utility model discloses a bury formula garbage collection device, put in case and controlling means including crane, garbage bin, intelligence. Locate the pit with the crane liftable, have the accommodation space in the crane, the top of crane is equipped with the first opening with the accommodation space intercommunication, and the garbage bin is located in the accommodation space, the bung hole and the first opening of garbage bin set up relatively. The intelligent delivery box comprises a box body and an intelligent box cover, wherein the box body is arranged at the top of the lifting frame, at least part of the box body extends out of the ground, the box body is provided with a second opening, a third opening and a conveying channel communicated with the second opening and the third opening, the second opening is communicated with the first opening, the third opening is located on the part, extending out of the ground, of the box body, and the intelligent box cover covers the third opening. The control device is electrically connected with the intelligent box cover and is used for controlling the intelligent box cover to close or open the third opening. The utility model discloses bury formula garbage collection device and effectively prevent that the rubbish stink from wafting out from the garbage bin.

Description

Buried garbage collection device

Technical Field

The utility model relates to a garbage collection technical field, in particular to bury formula garbage collection device.

Background

People are daily to be put in the rubbish of garbage bin and mostly domestic waste, domestic waste is rotten easily, especially in summer, rubbish is rotten smelly more, breed the mosquito fly, and then pollute the surrounding environment, the underground can all be placed to a lot of garbage collection devices now, in order to reduce the influence to the environment, but the lid of a lot of garbage collection devices generally needs people oneself to open can still advance garbage bin to rubbish, people can forget the lid of covering sometimes, perhaps rubbish can be unexpected to block the lid and lead to the lid can not cover completely, at this moment, the stink is easy to fly out from the garbage bin, attract the mosquito fly, pollute the environment on every side.

The above is only for the purpose of assisting understanding of the technical solution of the present invention, and does not represent an admission that the above is the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main objective provides a bury formula garbage collection device, the lid that aims at solving garbage collection device is forgotten easily and is covered or can not cover completely, and then the rubbish stink bleaches easily and influences the technical problem of environment.

In order to achieve the purpose, the utility model provides a bury formula garbage collection device, put in case and controlling means including crane, garbage bin, intelligence. The lifting frame is arranged in the pit in a lifting manner, an accommodating space is arranged in the lifting frame, a first opening communicated with the accommodating space is arranged at the top of the lifting frame, the garbage can is arranged in the accommodating space, and a bin opening of the garbage can is opposite to the first opening;

the intelligent delivery box comprises a box body and an intelligent box cover, the box body is arranged at the top of the lifting frame, at least part of the box body extends out of the ground, the box body is provided with a second opening, a third opening and a conveying channel communicated with the second opening and the third opening, the second opening is communicated with the first opening, the third opening is positioned at the part of the box body extending out of the ground, and the intelligent box cover covers the third opening;

the control device is electrically connected with the intelligent box cover and used for controlling the intelligent box cover to cover or open the third opening.

In an embodiment, the control device includes a driving element and a control main board, the driving element is connected to the intelligent box cover, and the control main board is electrically connected to the driving element to control the driving element to drive the intelligent box cover to close or open the third opening.

In one embodiment, the intelligent throwing box is provided with an infrared sensor, and the infrared sensor is electrically connected with the control mainboard;

the infrared sensor is provided with a first transmitting signal and a second transmitting signal, the control mainboard is used for receiving the first transmitting signal and controlling the driving piece to drive the intelligent box cover to open the third opening, and is used for receiving the second transmitting signal and controlling the driving piece to drive the intelligent box cover to close the third opening.

In one embodiment, the sensing distance of the infrared sensor is greater than or equal to 30 cm and less than or equal to 50 cm.

In an embodiment, the intelligent delivery box is further provided with one or more of a card reader, a two-dimensional code scanner and a touch screen, and the card reader, the two-dimensional code scanner and the touch screen are all electrically connected with the control main board and are provided with a first transmitting signal for controlling the intelligent box cover to open the third opening and a second transmitting signal for controlling the intelligent box cover to close the third opening.

In one embodiment, the buried garbage collection device further comprises a deodorization spraying device, and the deodorization spraying device is arranged at the top of the lifting frame and faces the garbage can; and/or the presence of a gas in the gas,

the buried garbage collection device further comprises an ultraviolet sterilization lamp, and the ultraviolet sterilization lamp is arranged at the top of the lifting frame and faces the garbage can.

In an embodiment, the buried garbage collection device further comprises a weighing tray and a pressure sensor, the weighing tray is connected with the pressure sensor, and the weighing tray is arranged corresponding to the second opening so as to weigh the weight of garbage thrown into the garbage can.

In an embodiment, the buried garbage collection device further comprises a lifting mechanism, the lifting mechanism is arranged below the lifting frame and connected with the lifting frame, and the lifting mechanism is used for lifting or pulling down the lifting frame.

In an embodiment, the buried garbage collection device further comprises a cloud platform, and the cloud platform is in communication connection with the buried garbage collection device.

In an embodiment, the lifting frame includes a top cover, the top cover is provided with the first opening, an annular protrusion is arranged on the surface of the top cover facing the pit, an annular groove is arranged on the ground close to the pit opening of the pit, and the annular protrusion is buckled with the annular groove.

The utility model discloses bury formula garbage collection device and place the garbage bin in the underground through the crane, when normal use, rubbish can only still advance the garbage bin from the external world through the third opening in, when the third opening is totally closed, rubbish in the garbage bin is separated by absolutely with the external world, very big solution the stink that rubbish sent influence the problem of surrounding environment. On this basis, the utility model discloses bury formula garbage collection device's controlling means can control intelligent case lid and open or the lid closes the third opening, has avoided the dustbin lid to be forgotten to cover or when being blocked the lid by rubbish not tightly, and the rubbish stink wafts out easily and influences the problem of surrounding environment.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural view of an embodiment of the buried garbage collection device of the present invention;

fig. 2 is a schematic view illustrating a structure in which the annular protrusion of fig. 1 is fastened to the annular groove.

The reference numbers illustrate:

the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B" including either scheme A, or scheme B, or a scheme in which both A and B are satisfied. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a bury formula garbage collection device.

In the embodiment of the present invention, as shown in fig. 1, the buried garbage collecting device 100 includes a lifting frame 110, a garbage can 120, an intelligent throwing box 130 and a control device. The lifting frame 110 is arranged in the pit in a lifting manner, an accommodating space 111 is arranged in the lifting frame 110, a first opening 112 communicated with the accommodating space 111 is arranged at the top of the lifting frame 110, the garbage can 120 is arranged in the accommodating space 111, and a bin opening of the garbage can 120 is arranged opposite to the first opening 112;

the intelligent delivery box 130 comprises a box body 131 and an intelligent box cover 132, wherein the box body 131 is arranged on the top of the lifting frame 110 and at least partially extends out of the ground, the box body 131 is provided with a second opening 1311, a third opening 1312 and a conveying channel 1313 for communicating the second opening 1311 with the third opening 1312, the second opening 1311 is communicated with the first opening 112, the third opening 1312 is positioned on the part of the box body 131 extending out of the ground, and the intelligent box cover 132 is arranged for covering the third opening 1312;

the control device is electrically connected with the intelligent box cover 132 and is used for controlling the intelligent box cover 132 to close or open the third opening 1312.

The utility model discloses bury formula garbage collection device 100 before the installation, need put in some at the rubbish that has selected in advance and set up the pit, the size and the crane 110 adaptation of pit, the degree of depth of pit except that need enough hold crane 110, should guarantee still that intelligent on the crane 110 puts in case 130 and can stretch out the bottom surface to in the sign of putting in some as a rubbish, and the people of being convenient for put in rubbish. The size of the crane 110 is determined according to the size and the number of the trash cans 120 to be placed, for example, a plurality of trash cans 120 with the capacity of 660 liters can be placed in the crane 110, so that enough trash can be stored, and the trash can be conveniently classified and thrown. The lifting frame 110 can ascend or descend in the pit through a power mechanism such as a motor, a hydraulic cylinder and the like, the power mechanism can be arranged in the pit along with the lifting frame 110, and an installation position can be independently arranged on the side of the pit so as to separate the power mechanism and the garbage into different spaces. The accommodating space 111 in the lifting frame 110 only needs to be enough for placing the garbage can 120, in the embodiment, for more convenient placement or replacement of the garbage can 120, the lifting frame 110 mainly comprises two flat plates and a bracket for connecting the two flat plates, the two flat plates are opposite up and down and are arranged at intervals, the accommodating space 111 is formed at the interval between the two flat plates, and thus the garbage can 120 can be conveniently placed or replaced from the side surface of the lifting frame 110.

When the trash can 120 is placed, the opening of the trash can 120 faces the first opening 112, so that the dropped trash can smoothly fall into the trash can 120. In other embodiments, in order to ensure that the trash can 120 does not move, deviate or topple over during the lifting process of the lifting frame 110, a limiting device is disposed at the bottom or the periphery of the trash can 120, for example, a boss is disposed at the position where the lifting frame 110 supports the trash can 120, and the boss extends into a groove at the bottom of the trash can 120, so that the limiting effect can be achieved. Of course, the stable placement of the trash can 120 can be ensured by other means, and is not limited in any way. The first opening 112 at the top of the lifting frame 110 allows garbage to pass through the lifting frame 110 and fall into the garbage can 120. it should be noted that, in order to avoid blocking the first opening 112 when the amount of garbage thrown into the garbage can is large, the first opening 112 can be set larger, for example, the size of the opening of the garbage can 120 can be approached. In addition, the lifting frame can be also provided with a smoke sensor, a fire extinguisher and the like to monitor whether a fire condition exists in the pit or not, and the fire can be extinguished through the fire extinguisher when the fire occurs.

The intelligent throwing box 130 at the top of the crane 110 is a direct part for throwing the garbage and also serves as an identification point for throwing the garbage, so that the intelligent throwing box 130 at least partially extends out of the ground, and the third opening 1312 serving as a garbage throwing inlet is exposed above the ground so as to facilitate the throwing of the garbage. The intelligent release box 130 should correspond to the first buckle setting and completely cover the first opening 112 to prevent the garbage odor from flying out. In this embodiment, when garbage is thrown in, the garbage firstly enters the conveying channel 1313 from the third opening 1312, then reaches the second opening 1311 through the conveying channel 1313, and finally enters the first opening 112 from the second opening 1311 and falls into the garbage can 120. Wherein the third opening 1312 may be provided at the top or side of the case 131, the conveying passage 1313 may be formed by the inner container provided in the case 131, and correspondingly, the second opening 1311 is provided at the bottom of the inner container and opposite to the first opening 112. The third opening 1312 may be disposed at the top, the side or other portions of the intelligent throw box 130, which are convenient for throwing garbage.

The third opening 1312 is covered by the intelligent box cover 132, and the covering mode can be a rotating covering mode, a sliding covering mode and the like, and can be set according to actual needs. The intelligent box cover 132 is controlled by the control device to open or close. Specifically, when the garbage needs to be thrown in, the control device controls the intelligent box cover 132 to open the third opening 1312, and after the garbage throwing is completed, the control device controls the intelligent box cover 132 to close the third opening 1312. In the process of putting in whole rubbish, rubbish input person need not oneself open intelligent case lid 132, and intelligent case lid 132 can not rely on input person and automatic lid closes, has avoided rubbish input person to forget the problem of covering the case lid, and simultaneously, intelligence case lid 132 just can the lid close after rubbish input is accomplished, can not have the case lid like this to be blocked by rubbish and can not cover the condition of closing completely, and then has avoided rubbish stink to fly out and influence the problem of surrounding environment from rubbish input mouth.

The utility model discloses bury formula garbage collection device 100 and place garbage bin 120 in the underground through crane 110, when normal use, rubbish can only still advance garbage bin 120 from the external world through third opening 1312, and when third opening 1312 was totally closed, rubbish in the garbage bin 120 was separated by absolutely with the external world, very big solution the stink that rubbish sent influence the problem of surrounding environment. On this basis, the utility model discloses bury formula garbage collection device 100's controlling means can control intelligent case lid 132 and open or cover and close third opening 1312, has avoided the dustbin lid to be forgotten to cover or when being blocked the lid by rubbish not tightly, and the rubbish stink wafts easily and influences the problem of surrounding environment. In an embodiment, the control device includes a driving element and a control main board, the driving element is connected to the intelligent box cover 132, and the control main board is electrically connected to the driving element to control the driving element to drive the intelligent box cover 132 to close or open the third opening 1312.

In an embodiment, as shown in fig. 1, the intelligent delivery box 130 is provided with an infrared sensor, and the infrared sensor is electrically connected to the control motherboard;

the infrared sensor has a first transmitting signal and a second transmitting signal, and the control main board is configured to receive the first transmitting signal and control the driving member to drive the intelligent box cover 132 to open the third opening 1312, and is configured to receive the second transmitting signal and control the driving member to drive the intelligent box cover 132 to close the third opening 1312.

In this embodiment, it should be noted that the infrared sensor may emit a corresponding signal by sensing whether the player blocks the infrared ray. Specifically, when rubbish input person is close to intelligent input box 130 and blocks off the infrared ray, infrared inductor sends first signal for the control mainboard, and the control mainboard receives behind the first signal control driving piece drive intelligent case lid 132 and opens third opening 1312, and rubbish input person can input rubbish. When the garbage thrower leaves the intelligent throwing box 130 and does not block the infrared ray, the infrared sensor transmits a second signal to the control mainboard, and the control mainboard controls the driving piece to drive the intelligent box cover 132 to cover the third opening 1312 after receiving the second signal. In other embodiments, the second signal may be set to be automatically sent after the first signal is sent for a period of time sufficient for the thrower to throw the garbage. It can be understood that the infrared sensor enables the intelligent control box cover 132 to automatically open or close the third opening 1312 without opening or closing by a garbage thrower, which is not only convenient for people to throw garbage, but also can ensure that the third opening 1312 is opened and closed in time. The driving member may be an electric motor, and after the control main board receives the signal, the electric motor is controlled to operate and drive the intelligent box cover 132 to rotate or slide.

In an embodiment, as shown in fig. 1, preferably, the sensing distance of the infrared sensor is greater than or equal to 30 cm and less than or equal to 50 cm. If inductive distance is less than 30 centimetres when, rubbish input person need be very close to intelligence input box 130 and just can be sensed by infrared inductor, and on the one hand is convenient inadequately to input rubbish person, and on the other hand can be because inductive distance is too short and can not sense, and then influence rubbish input. If the sensing distance is greater than 50 cm, the infrared sensor may sense the pedestrian passing by, and then the intelligent box cover 132 is continuously opened and closed to close the third opening 1312, which wastes electric energy resources and easily causes garbage odor to drift out. When the sensing distance of the infrared sensor is greater than or equal to 30 cm and less than or equal to 50 cm, the intelligent throwing box 130 is convenient for a garbage thrower to throw garbage, and the third opening 1312 cannot be opened and closed frequently due to the passing of pedestrians.

In an embodiment, as shown in fig. 1, the smart box 130 is further provided with one or more of a card reader, a two-dimensional code scanner, and a touch screen, and the card reader, the two-dimensional code scanner, and the touch screen are all electrically connected to the control motherboard and each have a first transmission signal for controlling the smart box cover 132 to open the third opening 1312 and a second transmission signal for controlling the smart box cover 132 to close the third opening 1312. Optionally, besides the infrared sensor, the intelligent release box 130 may further be provided with a card reader, a two-dimensional code scanner, or a touch screen to control the intelligent box cover 132 to open or close the third opening 1312, and these devices may also be provided on the intelligent box cover 132 to realize diversification of the opening modes of the intelligent box cover 132, so as to avoid that the intelligent box cover 132 may be opened in other modes when one of the intelligent box cover 132 fails. In other embodiments, the touch screen may interact with the trash thrower and guide the trash thrower to sort and throw the trash.

In one embodiment, as shown in fig. 1, in order to prevent the odor of the garbage in the garbage bin 120 from flying out and polluting the environment when the third opening 1312 is opened by the smart box cover 132, the buried garbage collection device 100 further includes a deodorizing and sprinkling device 140, and the deodorizing and sprinkling device 140 is arranged on the top of the lifting frame 110 and faces the garbage bin 120; and/or, in order to avoid the rotten rubbish breeding mosquitoes and flies, the buried rubbish collection device 100 further comprises an ultraviolet sterilization lamp 150, and the ultraviolet sterilization lamp 150 is arranged at the top of the lifting frame 110 and faces the rubbish bin 120. It can be understood that the deodorizing spray device 140 can reduce the odor of the garbage in the garbage can 120, and prevent the odor from flowing out of the third opening 1312 when garbage is thrown in. The ultraviolet sterilizing lamp 150 can reduce the number of mosquitoes in the trash can 120, and improve the environment. In other embodiments, to avoid wasting resources, the deodorization spraying device 140 or the ultraviolet sterilization/disinfection lamp 150 is turned on each time the third opening 1312 is opened by the smart box cover 132, or is turned on at regular time, so as to reduce wasting resources. Wherein, a deodorizing liquid containing device can be arranged on the lifting frame 110 to contain the deodorizing liquid and provide enough deodorizing liquid for the deodorizing spraying device 140.

In one embodiment, as shown in fig. 1, the underground garbage collecting device 100 further includes a weighing tray 160 and a pressure sensor, the weighing tray 160 is connected to the pressure sensor, and the weighing tray 160 is disposed corresponding to the second opening 1311 to weigh the garbage thrown into the garbage can 120. The weighing tray 160 may weigh the garbage dropped into the garbage can 120 at a time, and specifically, the garbage enters the conveying passage 1313 from the third opening 1312, then reaches the second opening 1311 and falls on the weighing tray 160, and after the weight of the garbage is detected by the pressure sensor and data is saved or transmitted, the weighing tray 160 drops the garbage dropped into the garbage can 120 by the driving of the driving device. The pressure sensor may be connected to a control motherboard or a cloud platform, and the weighing tray 160 may be connected to a driving member or other driving device. Of course, a weighing tray 160 may be provided at the bottom of the trash can 120 to weigh the amount of trash in the trash can 120.

In one embodiment, as shown in fig. 1, the underground garbage collecting device 100 further includes a lifting mechanism 170, the lifting mechanism 170 is disposed below the lifting frame 110 and connected to the lifting frame 110, and the lifting mechanism 170 is used for lifting or pulling down the lifting frame 110. The lifting mechanism 170 is arranged below the lifting frame 110, so that the lifting frame 110 can be lifted or lowered more conveniently and stably, the lifting mechanism 170 can be an electric motor, a hydraulic lifter and the like, and the concrete setting can be carried out according to actual requirements. In this embodiment, the lifting mechanism 170 includes a hydraulic lifter and a truss assembly, the hydraulic lifter is connected to the truss assembly, the truss assembly is connected to the bottom of the lifting frame 110, and the hydraulic lifter drives the truss assembly to move, so as to push the lifting frame 110 to ascend or pull the lifting frame 110 to descend.

In an embodiment, as shown in fig. 1, the buried garbage collecting device 100 further includes a cloud platform, and the cloud platform is communicatively connected to the buried garbage collecting device 100. After being in communication connection with the buried garbage collection device 100, the cloud platform can collect and analyze data of daily operation of the buried garbage collection device 100, such as garbage weight, use times, garbage bin overflow condition and the like, and provides a data base for improving the buried garbage collection device 100. The operation of the buried garbage collection device 100 can also be remotely controlled through the cloud platform, such as deodorization, clearing and the like.

In an embodiment, as shown in fig. 1 and fig. 2, the lifting frame 110 includes a top cover 113, the top cover 113 is provided with the first opening 112, a ring-shaped protrusion 1131 is provided on a surface of the top cover 113 facing the pit, a ring-shaped groove 180 is provided on a ground surface near the pit opening of the pit, and the ring-shaped protrusion 1131 is fastened to the ring-shaped groove 180. The buckling of the annular protrusion 1131 and the annular groove 180 prevents the odor of the garbage in the garbage can 120 from drifting out from the gap between the lifting frame 110 and the pit, further reducing the possibility of odor drifting out and improving the surrounding environment.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A buried garbage collection device, comprising:

the lifting frame is arranged in the pit in a lifting manner, an accommodating space is arranged in the lifting frame, and a first opening communicated with the accommodating space is formed in the top of the lifting frame;

the garbage can is arranged in the accommodating space, and a can opening of the garbage can is opposite to the first opening;

the intelligent delivery box comprises a box body and an intelligent box cover, wherein the box body is arranged at the top of the lifting frame, at least part of the box body extends out of the ground, the box body is provided with a second opening, a third opening and a conveying channel communicated with the second opening and the third opening, the second opening is communicated with the first opening, the third opening is positioned at the part of the box body extending out of the ground, and the intelligent box cover covers the third opening; and

and the control device is electrically connected with the intelligent box cover and used for controlling the intelligent box cover to cover or open the third opening.

2. The underground garbage collection device of claim 1, wherein the control device comprises a driving member and a control main board, the driving member is connected with the intelligent box cover, and the control main board is electrically connected with the driving member to control the driving member to drive the intelligent box cover to close or open the third opening.

3. A buried garbage collection device according to claim 2, wherein the intelligent throwing box is provided with an infrared sensor, and the infrared sensor is electrically connected with the control mainboard;

4. A buried refuse collection device according to claim 3, wherein the sensing distance of the infrared sensor is greater than or equal to 30 cm and less than or equal to 50 cm.

5. A buried garbage collection device as defined in claim 2, wherein the intelligent throw-in box is further provided with one or more of a card reader, a two-dimensional code scanner and a touch screen, the card reader, the two-dimensional code scanner and the touch screen are all electrically connected to the control motherboard and are provided with a first transmission signal for controlling the intelligent box cover to open the third opening and a second transmission signal for controlling the intelligent box cover to close the third opening.

6. The underground refuse collection device of claim 1, further comprising a deodorizing spray device disposed on the top of the crane and facing the refuse receptacle; and/or the presence of a gas in the gas,

7. A buried refuse collection device according to claim 1, further comprising a weighing tray and a pressure sensor, wherein the weighing tray is connected to the pressure sensor, and the weighing tray is disposed corresponding to the second opening to weigh the refuse thrown into the refuse receptacle.

8. A buried refuse collection device according to claim 1, further comprising an elevating mechanism provided below the crane and connected to the crane, the elevating mechanism being configured to raise or lower the crane.

9. The underground refuse collection device of any one of claims 1 to 8, further comprising a cloud platform, wherein the cloud platform is communicatively connected to the underground refuse collection device.

10. A buried garbage collection device according to any one of claims 1 to 8, wherein the lifting frame comprises a top cover, the top cover is provided with the first opening, the surface of the top cover facing the pit is provided with an annular protrusion, the ground surface is provided with an annular groove near the pit opening of the pit, and the annular protrusion is buckled with the annular groove.