A mine ventilation system inspection device

Abstract

The utility model discloses a kind of mine ventilation system inspection devices, including machine body, the mobile base is equipped in machine body bottom, the mobile base and machine body are detachably connected, the rear end of mobile base is equipped with two push rods, the push rod top is equipped with hang joint, the top of machine body one side is equipped with bendable shaping rod, the top of bendable shaping rod is equipped with illuminating lamp, camera is installed in the other side of machine body, camera can be adjusted inclination angle;Machine body side is connected with anemometer, for measuring the wind speed inside mine or inside ventilation duct, the other side of machine body is equipped with environmental detection probe, for measuring each environmental parameter in mine.The utility model is installed mobile base in machine body bottom, so that the whole equipment can be pushed in mine, so staff can avoid tool on the body, to realize the purpose of staff reduction load;Machine body cooperates mobile base and can also hang on staff body.

Description

Technical Field

[0001] This utility model relates to the field of mining equipment technology, specifically to a mining ventilation system inspection device. Background Technology

[0002] Mine ventilation systems are crucial infrastructure for ensuring safe production in mines. Their primary function is to provide fresh air to underground workers, expel toxic and harmful gases and dust, regulate temperature and humidity, and create a safe and comfortable working environment. However, mine ventilation systems operate in a complex and harsh underground environment for extended periods, making ventilation ducts prone to damage and blockages. Furthermore, fans and other equipment may develop malfunctions due to prolonged operation. Therefore, regular inspections of mine ventilation systems to promptly identify and address potential problems are essential for ensuring safe mine production and reducing accident risks.

[0003] A utility model patent with publication number CN222686745U discloses an inspection device for a ventilation shaft system, including a lifting component. This solution, by incorporating both a lifting and rotating component, allows for adjustment of the height and angle of the inspection component. This addresses the problem of common inspection devices for ventilation shaft systems that only include the inspection component, which can check the ventilation status but lacks an adjustment structure for the component, making it impossible to adjust its height and angle. This can lead to incomplete inspections and affect the accuracy of the inspection results.

[0004] The inspection devices for ventilation systems in mine shafts provided in the aforementioned patents are mostly fixedly installed at a single inspection location. However, in practice, when inspecting a mine ventilation system, workers need to check the entire length of the ventilation duct to ensure the system functions correctly at every location. Existing fixed inspection devices are not suitable for workers to inspect the ventilation system. Furthermore, workers need to carry a large number of tools during inspections, which is cumbersome and inconvenient for them to operate. Utility Model Content

[0005] The purpose of this utility model is to provide a mine ventilation system inspection device, which aims to improve the problem that the existing ventilation system inspection devices are not suitable for workers to inspect the ventilation system, and that workers need to carry a lot of tools when inspecting, which is troublesome and inconvenient for workers to operate.

[0006] This utility model is implemented as follows:

[0007] A mine ventilation system inspection device includes a main body with a movable base at its bottom, the movable base being detachably connected to the main body. Two push rods are located at the rear end of the movable base, with hanging connectors at the top of each push rod. A flexible shaping rod is located on one side of the top of the main body, with a light source at its top. A camera is installed on the other side of the main body, and the camera's tilt angle is adjustable. An anemometer is connected to one side of the main body for measuring the wind speed inside the mine or ventilation ducts. An environmental detection probe is located on the other side of the main body for measuring various environmental parameters within the mine.

[0008] Preferably, the upper surface of the body is provided with a display screen, and a control panel is provided behind the display screen; the two sides of the body are symmetrically provided with carrying slots, which are inclined upwards; and a charging slot is provided at the bottom of one side of the body.

[0009] Preferably, the bottom of both sides of the body is provided with fixing grooves, and multiple connecting grooves are provided inside the fixing grooves. Connectors and buckles are symmetrically provided on the top of both sides of the body. A support plate is provided on the top of the body along the bottom of the camera. An adapter post is provided on one side of the support plate. A connecting slot is provided on the upper surface of the body.

[0010] Preferably, the upper surface of the movable base is provided with grooves near the corners, and the bottom corners of the movable base are provided with moving wheels; the hanging joint has a U-shaped structure.

[0011] Preferably, the upper surface of the mobile base is symmetrically provided with retaining plates on both sides, and the retaining plates are provided with multiple countersunk holes, through which bolts are passed to connect the mobile base and the machine body.

[0012] Preferably, the anemometer has a first handle at its bottom end, a first spring wire at its bottom end, a first mounting connector at its end, and the first mounting connector is connected to a connector.

[0013] Preferably, the environmental detection probe has a second handle at its bottom end, a second spring wire at its bottom end, a second mounting connector at its end, and the second mounting connector is connected to the connector head.

[0014] Preferably, the environmental detection probe integrates a gas concentration sensor, a temperature sensor, and a humidity sensor. The gas concentration sensor can simultaneously detect the concentrations of multiple toxic and harmful gases, including methane, carbon monoxide, and carbon dioxide. The temperature sensor and humidity sensor are used to monitor the temperature and humidity parameters within the ventilation system in real time.

[0015] Preferably, the bottom of the camera is provided with a support rod, the bottom of the support rod is provided with a collar, the collar is fitted onto the adapter post, and the outer side of the collar is provided with a clamping knob; the rear end of the camera is provided with a connecting cable, the end of the connecting cable is provided with a connecting plug, and the connecting plug is connected to the body.

[0016] Preferably, it also includes a pull-out box, with a mounting groove on one side of the body, the pull-out box being inserted into the mounting groove, a magnetic absorbing piece on the side of the pull-out box facing the body, the pull-out box being magnetically connected to the body, and a pull groove in the middle of the side of the pull-out box facing outward, with a pull head in the middle of the pull groove for pulling the pull-out box.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This utility model, by installing a movable base at the bottom of the machine body, allows the entire device to be pushed in the mine, thus avoiding the need for workers to carry tools on their bodies and reducing their burden. Furthermore, the machine body, together with the movable base, can also be hung on the worker's body, making it convenient to walk on sections of the mine where it is difficult to move. This makes the entire inspection device highly adaptable. The machine body is equipped with a light and a camera, which can illuminate and record the inspection location, facilitating the recording of the inspection process. The light also provides auxiliary lighting for the inspection workers.

[0019] 2. This utility model features a pull-out box on one side of the machine body, which can hold some commonly used tools, greatly facilitating the operation of staff and making it easier to access and use these tools. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the body of this utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the movable base of this utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the anemometer of this utility model;

[0024] Figure 5 This is a schematic diagram of the structure of the environmental detection probe of this utility model;

[0025] Figure 6 This is a structural block diagram of the internal structure of the environmental detection probe of this utility model;

[0026] Figure 7This is a schematic diagram of the structure of the camera of this utility model;

[0027] Figure 8 This is a structural schematic diagram of the pull-out box of this utility model.

[0028] In the diagram: 1. Body; 10. Flexible shaping rod; 101. Lighting lamp; 11. Display screen; 12. Control panel; 13. Handle slot; 14. Mounting slot; 15. Charging slot; 16. Fixing slot; 161. Connecting slot; 17. Connector; 18. Connection slot; 19. Support plate; 191. Adapter post; 192. Buckle; 2. Movable base; 21. Groove; 22. Clamping plate; 23. Countersunk hole; 24. Movable... 25. Wheel; 26. Push rod; 3. Hanging connector; 4. Anemometer; 51. First grip; 52. First spring wire; 33. First mounting connector; 4. Environmental detection probe; 51. Second grip; 52. Second spring wire; 43. Second mounting connector; 5. Camera; 51. Support rod; 52. Collar; 53. Clamping knob; 54. Connecting wire; 55. Connecting plug; 6. Pull-out box; 61. Pull groove; 62. Pull head. Detailed implementation method:

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details:

[0031] Example 1

[0032] like Figure 1 , Figure 2 and Figure 3As shown, a mine ventilation system inspection device includes a body 1. A movable base 2 is located at the bottom of the body 1, and the movable base 2 is detachably connected to the body 1. The movable base 2, in conjunction with the body 1, facilitates the movement of the entire inspection device, enabling flexible use. Two push rods 25 are located at the rear end of the movable base 2. Each push rod 25 has a hanging connector 26 at its top. The push rods 25 facilitate pushing the entire device, allowing for flexible use. The hanging connectors 26 facilitate hanging the device on the worker's shoulder, or the entire device itself, when it is inconvenient to push the device. A flexible shaping rod 10 is located on one side of the top of the body 1. A lighting lamp 101 is located at the top of the flexible shaping rod 10. The flexible shaping rod 10 supports the lighting lamp 101, facilitating illumination of the inspection environment. The flexible shaping rod 10 is also easy to rotate, allowing for angle adjustment of the lighting lamp 101. The flexible, shape-adjustable rod 10 is similar to the kind of rod used in lazy phone holders, which can be bent and supported at will. A camera 5 is installed on the other side of the body 1; the camera 5 is tilt-adjustable and facilitates monitoring of the detection environment. An anemometer 3 is connected to one side of the body 1 for measuring the wind speed inside the mine or ventilation ducts, and an environmental detection probe 4 is located on the other side of the body 1 for measuring various environmental parameters within the mine.

[0033] like Figure 2 As shown, the upper surface of the body 1 is equipped with a display screen 11, which facilitates the display of monitored data. Behind the display screen 11 is a control panel 12; the control panel 12 facilitates the operation of the entire body 1 and its use. Symmetrically arranged on both sides of the body 1 are carrying handles 13, which are angled upwards for easy lifting and handling. A charging slot 15 is located at the bottom of one side of the body 1 for charging the internal battery. Fixing slots 16 are located at the bottom of both sides of the body 1, with multiple connecting slots 161 inside. The fixing slots 16, in conjunction with the connecting slots 161, facilitate the connection of the body 1 to the mobile base 2. Symmetrically arranged on the top of both sides of the body 1 are connectors 17 and clips 192. Connectors 17 facilitate connection to the anemometer 3 and the environmental detection probe 4, while clips 192 facilitate the engagement of the anemometer 3 and the environmental detection probe 4. A support plate 19 is provided on the top of the body 1 along the bottom of the camera 5. An adapter post 191 is provided on one side of the support plate 19. The cooperation between the support plate 19 and the adapter post 191 facilitates connection with the camera 5 and makes it easy to adjust and use the camera 5. A connection slot 18 is provided on the upper surface of the body 1, which facilitates connection between the body 1 and the camera 5.

[0034] like Figure 3As shown, the upper surface of the mobile base 2 has grooves 21 near the corners, which facilitate the insertion of the bottom support legs of the machine body 1 into the grooves 21. The bottom corners of the mobile base 2 are equipped with casters 24, which facilitate flexible use of the entire mobile base 2. The casters 24 can be selected according to the actual inspection environment. For example, if there is mostly flat ground, universal casters can be used; if movement on a track is required, wheels compatible with the track can be used; if explosion-proof requirements are present, wheels with explosion-proof structures must be used. The casters 24 can also be designed as detachable structures for easy replacement. The mounting connector 26 has a U-shaped structure, and symmetrical locking plates 22 are provided on both sides of the upper surface of the mobile base 2. Multiple countersunk holes 23 are provided on the locking plates 22. Bolts pass through the countersunk holes 23 to connect the mobile base 2 and the machine body 1, ensuring a stable connection between the mobile base 2 and the machine body 1.

[0035] like Figure 4 As shown, the anemometer 3 has a first handle 31 at its bottom, a first spring wire 32 at its bottom, and a first mounting connector 33 at its end, which is connected to the connector 17. The first handle 31 is designed to facilitate gripping the anemometer 3, making its operation and use easier.

[0036] like Figure 5 As shown, the environmental detection probe 4 has a second handle 41 at the bottom, a second spring wire 42 at the bottom of the second handle 41, and a second mounting connector 43 at the end of the second spring wire 42. The second mounting connector 43 is connected to the connector 17. This structure makes it convenient for staff to hold the environmental detection probe 4 and facilitates the flexible use of the environmental detection probe 4.

[0037] like Figure 6 As shown, the environmental detection probe 4 integrates a gas concentration sensor, a temperature sensor, and a humidity sensor. The gas concentration sensor can simultaneously detect the concentration of multiple toxic and harmful gases such as methane, carbon monoxide, and carbon dioxide; the temperature sensor and humidity sensor are used to monitor the temperature and humidity parameters in the ventilation system in real time.

[0038] like Figure 7 As shown, the bottom of the camera 5 is equipped with a support rod 51, and the bottom end of the support rod 51 is equipped with a collar 52. The collar 52 is fitted onto the adapter post 191. This structure facilitates the rotation of the camera 5 and the adjustment of its tilt angle, making the camera 5 easy to use. A clamping knob 53 is provided on the outer side of the collar 52; the clamping knob 53 is used to fix the tilt angle of the camera 5. A connecting cable 54 is provided at the rear end of the camera 5, and a connecting plug 55 is provided at the end of the connecting cable 54. The connecting plug 55 is plugged into the body 1, facilitating the connection between the camera 5 and the body 1 and enabling the camera 5 to operate.

[0039] Example 2

[0040] like Figure 1 , Figure 2 and Figure 3 As shown, a mine ventilation system inspection device includes a body 1. A movable base 2 is located at the bottom of the body 1, and the movable base 2 is detachably connected to the body 1. The movable base 2, in conjunction with the body 1, facilitates the movement of the entire inspection device, enabling flexible use. Two push rods 25 are located at the rear end of the movable base 2. Each push rod 25 has a hanging connector 26 at its top. The push rods 25 facilitate pushing the entire device, allowing for flexible use. The hanging connectors 26 facilitate hanging the device on the worker's shoulder, or the entire device itself, when it is inconvenient to push the device. A flexible shaping rod 10 is located on one side of the top of the body 1. A lighting lamp 101 is located at the top of the flexible shaping rod 10. The flexible shaping rod 10 supports the lighting lamp 101, facilitating illumination of the inspection environment. The flexible shaping rod 10 is also easy to rotate, allowing for angle adjustment of the lighting lamp 101. The flexible, shape-adjustable rod 10 is similar to the kind of rod used in lazy phone holders, which can be bent and supported at will. A camera 5 is installed on the other side of the body 1; the camera 5 is tilt-adjustable and facilitates monitoring of the detection environment. An anemometer 3 is connected to one side of the body 1 for measuring the wind speed inside the mine or ventilation ducts, and an environmental detection probe 4 is located on the other side of the body 1 for measuring various environmental parameters within the mine.

[0041] like Figure 2 As shown, the upper surface of the body 1 is equipped with a display screen 11, which facilitates the display of monitored data. Behind the display screen 11 is a control panel 12; the control panel 12 facilitates the operation of the entire body 1 and its use. Symmetrically arranged on both sides of the body 1 are carrying handles 13, which are angled upwards for easy lifting and handling. A charging slot 15 is located at the bottom of one side of the body 1 for charging the internal battery. Fixing slots 16 are located at the bottom of both sides of the body 1, with multiple connecting slots 161 inside. The fixing slots 16, in conjunction with the connecting slots 161, facilitate the connection of the body 1 to the mobile base 2. Symmetrically arranged on the top of both sides of the body 1 are connectors 17 and clips 192. Connectors 17 facilitate connection to the anemometer 3 and the environmental detection probe 4, while clips 192 facilitate the engagement of the anemometer 3 and the environmental detection probe 4. A support plate 19 is provided on the top of the body 1 along the bottom of the camera 5. An adapter post 191 is provided on one side of the support plate 19. The cooperation between the support plate 19 and the adapter post 191 facilitates connection with the camera 5 and makes it easy to adjust and use the camera 5. A connection slot 18 is provided on the upper surface of the body 1, which facilitates connection between the body 1 and the camera 5.

[0042] like Figure 3 As shown, the upper surface of the mobile base 2 has grooves 21 near the corners, which facilitate the insertion of the bottom support legs of the machine body 1 into the grooves 21. The bottom corners of the mobile base 2 are equipped with casters 24, which facilitate flexible use of the entire mobile base 2. The mounting connector 26 has a U-shaped structure. Symmetrical locking plates 22 are provided on both sides of the upper surface of the mobile base 2. Each locking plate 22 has multiple countersunk holes 23. Bolts pass through these countersunk holes 23 to connect the mobile base 2 to the machine body 1, ensuring a stable connection between the mobile base 2 and the machine body 1.

[0043] like Figure 4 As shown, the anemometer 3 has a first handle 31 at the bottom, a first spring wire 32 at the bottom of the first handle 31, and a first mounting connector 33 at the end of the first spring wire 32. The first mounting connector 33 is connected to the connector 17. The first handle 31 is for easy gripping of the anemometer 3, which facilitates the operation and use of the anemometer 3.

[0044] like Figure 5 As shown, the environmental detection probe 4 has a second handle 41 at the bottom, a second spring wire 42 at the bottom of the second handle 41, and a second mounting connector 43 at the end of the second spring wire 42. The second mounting connector 43 is connected to the connector 17. This structure makes it convenient for staff to hold the environmental detection probe 4 and facilitates the flexible use of the environmental detection probe 4.

[0045] like Figure 6 As shown, the environmental detection probe 4 integrates a gas concentration sensor, a temperature sensor, and a humidity sensor. The gas concentration sensor can simultaneously detect the concentration of multiple toxic and harmful gases such as methane, carbon monoxide, and carbon dioxide; the temperature sensor and humidity sensor are used to monitor the temperature and humidity parameters in the ventilation system in real time.

[0046] like Figure 7 As shown, the bottom of the camera 5 is equipped with a support rod 51, and the bottom end of the support rod 51 is equipped with a collar 52. The collar 52 is fitted onto the adapter post 191. This structure facilitates the rotation of the camera 5 and the adjustment of its tilt angle, making the camera 5 easy to use. A clamping knob 53 is provided on the outer side of the collar 52; the clamping knob 53 is used to fix the tilt angle of the camera 5. A connecting cable 54 is provided at the rear end of the camera 5, and a connecting plug 55 is provided at the end of the connecting cable 54. The connecting plug 55 is plugged into the body 1, facilitating the connection between the camera 5 and the body 1 and enabling the camera 5 to operate.

[0047] like Figure 8As shown, it also includes a pull-out box 6. A mounting groove 14 is provided on one side of the body 1, and the pull-out box 6 is inserted into the mounting groove 14. This structure facilitates the assembly, disassembly, and use of the pull-out box 6. A magnetic suction piece is provided on the side of the pull-out box 6 facing the body 1, magnetically connecting the pull-out box 6 to the body 1, allowing the pull-out box 6 to remain stable inside the mounting groove 14 without external force. A pull groove 61 is provided in the center of the outer side of the pull-out box 6, and a pull head 62 is provided in the center of the pull groove 61 for pulling the pull-out box 6.

[0048] Working Principle: During use, assemble the entire device according to requirements, ensuring the battery inside the main unit 1 is fully charged. Then, the operator places the necessary tools into the pull-out box 6 and moves the device flexibly. The environmental monitoring probe 4 can detect the concentration of various toxic and harmful gases such as methane, carbon monoxide, and carbon dioxide, as well as temperature and humidity parameters inside the mine. The anemometer 3 monitors the wind speed inside the mine. Both the environmental monitoring probe 4 and the anemometer 3 can be inserted into the ventilation system ducts for convenient measurement of various parameters within the ducts. Operation is convenient. When the mine road is difficult to navigate, simply hang the push rod 25 on the operator's shoulder via the mounting connector 26. This simple and convenient operation saves effort on conventional surfaces and allows for flexible use on rough terrain, greatly improving the overall flexibility of the equipment.

[0049] In summary, compared with the prior art, this application, by installing a movable base 2 at the bottom of the body 1, allows the entire device to be pushed in the mine, thus avoiding the need for workers to carry tools on their bodies and reducing their burden. Furthermore, the body 1, together with the movable base 2, can also be hung on the worker's body, making it convenient to walk on sections of the mine where it is difficult to move. This makes the inspection device highly adaptable. The body 1 is equipped with a lighting lamp 101 and a camera 5, which can illuminate and record the inspection location, facilitating the recording of the inspection process. The lighting lamp 101 also provides auxiliary lighting for the inspection workers.

[0050] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A mine ventilation system inspection device, comprising a body (1), characterized in that, The bottom of the machine body (1) is provided with a movable base (2), which is detachably connected to the machine body (1). The rear end of the movable base (2) is provided with two push rods (25), and the top of the push rods (25) is provided with a hanging connector (26). One side of the top of the machine body (1) is provided with a bendable shaping rod (10), and the top of the bendable shaping rod (10) is provided with a lighting lamp (101). The other side of the machine body (1) is equipped with a camera (5), which can be tilted. One side of the machine body (1) is connected to an anemometer (3) for measuring the wind speed inside the mine or ventilation duct. The other side of the machine body (1) is provided with an environmental detection probe (4) for measuring various environmental parameters inside the mine.

2. The inspection device for a mine ventilation system according to claim 1, characterized in that, The upper surface of the body (1) is provided with a display screen (11), and a control panel (12) is provided behind the display screen (11); the two sides of the body (1) are symmetrically provided with carrying slots (13), the carrying slots (13) are inclined upwards, and a charging slot (15) is provided at the bottom of one side of the body (1).

3. The inspection device for a mine ventilation system according to claim 2, characterized in that, The bottom of both sides of the body (1) is provided with fixing grooves (16), and the inner side of the fixing grooves (16) is provided with multiple connecting grooves (161). The top of both sides of the body (1) is symmetrically provided with connectors (17) and buckles (192). The top of the body (1) is provided with a support plate (19) along the bottom of the camera (5). The support plate (19) is provided with an adapter post (191) on one side. The upper surface of the body (1) is provided with a connecting slot (18).

4. The inspection device for a mine ventilation system according to claim 1, characterized in that, The upper surface of the movable base (2) is provided with grooves (21) near the corners, and the bottom corners of the movable base (2) are provided with moving wheels (24); the hanging connector (26) has a U-shaped structure.

5. A mine ventilation system inspection device according to claim 4, characterized in that, The movable base (2) has symmetrically arranged card plates (22) on both sides of its upper surface. The card plates (22) have multiple countersunk holes (23). Bolts pass through the countersunk holes (23) to connect the movable base (2) and the body (1).

6. A mine ventilation system inspection device according to claim 3, characterized in that, The anemometer (3) has a first handle (31) at its bottom end, a first spring wire (32) at its bottom end, a first mounting connector (33) at its end, and the first mounting connector (33) is connected to the connector (17).

7. A mine ventilation system inspection device according to claim 3, characterized in that, The environmental detection probe (4) has a second handle (41) at its bottom end, a second spring wire (42) at its bottom end, a second mounting connector (43) at its end, and the second mounting connector (43) is connected to the connector (17).

8. A mine ventilation system inspection device according to claim 7, characterized in that, The environmental detection probe (4) integrates a gas concentration sensor, a temperature sensor and a humidity sensor. The gas concentration sensor can simultaneously detect the concentrations of multiple toxic and harmful gases such as methane, carbon monoxide and carbon dioxide. The temperature sensor and humidity sensor are used to monitor the temperature and humidity parameters in the ventilation system in real time.

9. A mine ventilation system inspection device according to claim 3, characterized in that, The camera (5) has a support rod (51) at the bottom end, and a collar (52) at the bottom end of the support rod (51). The collar (52) is fitted onto the adapter post (191), and a clamping knob (53) is provided on the outer side of the collar (52). The camera (5) has a connecting line (54) at the rear end, and a connecting plug (55) at the end of the connecting line (54). The connecting plug (55) is connected to the body (1).

10. A mine ventilation system inspection device according to any one of claims 1-9, characterized in that, It also includes a pull-out box (6), and the body (1) has a mounting groove (14) on one side. The pull-out box (6) is inserted into the mounting groove (14). The side of the pull-out box (6) facing the body (1) has a magnetic piece. The pull-out box (6) is magnetically connected to the body (1). The pull-out box (6) has a pull groove (61) in the middle of the side facing outward. The pull groove (61) has a pull head (62) in the middle for pulling the pull-out box (6).

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