Explosion-proof LED display screen

Abstract

The utility model discloses an anti -explosion LED display screen relates to display screen technical field. The anti -explosion LED display screen, including the shell, the back center fixed mounting of shell has the support, the back of shell is paved with the heat dissipation fin, just the shell inside is equipped with the heat conduction rib of integration forming with heat dissipation fin, the heat conduction rib is along the horizontal distribution of shell inner wall surface, the front opening of shell is sealed fixed mounting has screen subassembly, be provided with detachable transport explosion -proof assembly on the shell in the transportation process, and the explosion -proof shell is fixed to the shell through bolt, and the protective batten and the reinforcing rib can effectively buffer the collision impact, and the structural strength is promoted, and the screen subassembly forms the pertinence protection, and the lifting ear is convenient for equipment handling, and the detachable design does not influence the normal use of subsequent, significantly reduce the transportation loss, on the explosion -proof performance, the sealing pad sealing structure of drive box and the sealed design of screen subassembly form all -round explosion -proof protection, prevent the invasion of external flammable and explosive medium inside.

Description

Technical Field

[0001] This utility model relates to the field of display screen technology, and in particular to an explosion-proof LED display screen. Background Technology

[0002] As a key information display device in flammable and explosive environments such as petrochemical, coal mining, and metallurgical processing, explosion-proof LED displays must meet the core requirements of explosion-proof sealing, stable heat dissipation, and clear display in their structural design. However, the protection during transportation has always been a key bottleneck restricting their widespread application. In the existing technology, the transportation protection of explosion-proof LED displays mostly adopts general packaging solutions, which do not fully consider the special characteristics of their explosion-proof structure, resulting in frequent safety hazards and equipment damage during transportation.

[0003] First, existing transportation protection methods lack targeted protection for the core explosion-proof structure of the display screen. The front light-transmitting components and the sealing joint surface of the outer shell of the explosion-proof LED display screen are key weak points in explosion-proof performance. Ordinary packaging often uses simple methods such as foam filling and wrapping with stretch film, which cannot effectively buffer the collision and impact load during transportation. This can easily cause scratches on the light-transmitting components and deformation of the sealing surface, directly damaging the explosion-proof performance and sealing reliability of the equipment. As a result, the equipment cannot be put into use after arriving at the site due to the failure of the explosion-proof structure, and may even cause safety accidents in subsequent operation.

[0004] Secondly, the stability of the existing fixing method is insufficient. Due to the large overall weight of the explosion-proof LED display screen and the integration of precision components such as drive modules and power supply components, the existing binding and fixing or simple bracket support methods commonly used in transportation are difficult to withstand the bumps and vibrations during long-distance transportation. This can easily lead to the overall displacement of the equipment and the loosening of internal components, which in turn can cause faults such as poor circuit contact and detachment of the heat conduction structure, increasing the cost and cycle of subsequent maintenance and debugging, and seriously affecting the on-site construction progress.

[0005] Furthermore, existing protection solutions do not take into account the temporary sealing requirements during transportation. The outer shell interface and cable entry hole of the explosion-proof LED display lack effective temporary sealing measures during transportation. External dust, moisture and other impurities can easily enter the equipment through these gaps, adhere to the surface of circuit components or block heat dissipation channels. This will not only reduce the insulation performance of the equipment, but may also lead to a decrease in heat dissipation efficiency, indirectly affecting the explosion-proof safety and service life of the equipment.

[0006] In summary, existing transportation protection solutions for explosion-proof LED displays suffer from numerous defects, including insufficient specificity, poor fixation reliability, lack of temporary sealing, and inconvenience in loading and unloading. These defects severely affect the transportation safety and integrity of the equipment and restrict its efficient application in various flammable and explosive environments. Utility Model Content

[0007] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art, and to provide an explosion-proof LED display screen that can solve the problem that existing transportation protection lacks targeted protection for the core explosion-proof structure of the display screen.

[0008] To achieve the above objectives, the present invention provides the following technical solution: an explosion-proof LED display screen, including a housing, a bracket fixedly installed at the center of the back of the housing, heat dissipation fins laid on the back of the housing, and heat-conducting ribs integrally formed with the heat dissipation fins inside the housing, the heat-conducting ribs being distributed laterally along the inner wall of the housing.

[0009] The back of the housing is provided with an adaptation groove, in which a sealed explosion-proof drive box is embedded and located below the bracket. The drive box is fastened to the back of the housing, and a sealing gasket is sandwiched between the two mating surfaces. The groove is provided with a heat-conducting protrusion integrated with the heat-conducting rib, and the inner wall of the drive box is tightly fitted with the heat-conducting protrusion.

[0010] The drive box contains a drive board and a power supply. The drive board has two explosion-proof terminals, and the power supply is electrically connected to the terminals via wires. The interior of the housing is lined with a flame-retardant reflective film, which is positioned away from the heat-conducting ribs.

[0011] Multiple LED strips are fixedly installed in a horizontal array inside the housing and above the flame-retardant reflective film. Each LED strip is attached to the heat-conducting rib, and multiple LED beads are fixedly installed on the LED strip in an array.

[0012] A screen assembly is sealed and fixedly installed at the front opening of the housing. Another explosion-proof terminal is fixedly installed on the outer side wall of the housing. The explosion-proof terminal is electrically connected to the housing, the drive box, and the screen assembly through wires to form a grounding circuit. A detachable explosion-proof transport component is provided on the housing.

[0013] Preferably, the explosion-proof transport component includes protective edge strips, explosion-proof shell, threaded holes, lifting lugs, bolts, and reinforcing ribs;

[0014] The explosion-proof shell is a protective structure that is temporarily placed on the outside of the screen assembly during transportation and is removed during normal use; the threaded holes are opened around the explosion-proof shell and at corresponding positions on the outer periphery of the outer shell, and the bolts are threaded into the threaded holes to detachably fix the explosion-proof shell to the outer shell.

[0015] Preferably, a temporary sealing gasket is provided at the contact point between the explosion-proof shell and the outer shell, the protective edge strip is fixedly installed around the perimeter of the explosion-proof shell, the reinforcing rib is fixedly installed on the front of the explosion-proof shell, and the two lifting lugs are fixedly installed on the top of the explosion-proof shell.

[0016] Preferably, the drive box is fastened to the back of the housing by bolts, the sealing gasket is made of fluororubber, and the edge of the sealing gasket is flush with the edge of the mating surface of the drive box and the housing.

[0017] Preferably, the heat-conducting protrusion extends along the inner wall of the groove, and the extension direction of the heat-conducting protrusion is consistent with the transverse distribution direction of the heat-conducting ribs, and the contact surface between the inner wall of the drive box and the heat-conducting protrusion is a plane.

[0018] Preferably, the light strip is fixed inside the housing by a buckle or bolt, the back of the light strip is completely attached to the surface of the heat-conducting rib, and the LED beads are positioned facing the screen assembly.

[0019] Preferably, the flame-retardant reflective film is adhered to the inner wall of the outer casing by a high-temperature resistant adhesive layer, and an avoidance notch is provided on the flame-retardant reflective film corresponding to the position of the heat-conducting rib, the size of the avoidance notch being adapted to the cross-sectional size of the heat-conducting rib.

[0020] Preferably, the heat dissipation fins are evenly distributed along the longitudinal or transverse direction of the back of the housing, and the height of the heat dissipation fins gradually decreases from the position near the drive box to the position away from the drive box.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] 1. During transportation, the explosion-proof LED display screen is secured to the outer shell with bolts. The protective edge strips and reinforcing ribs can effectively buffer collision impacts and improve structural strength, providing targeted protection for the screen components. The lifting ears facilitate equipment handling, and the detachable design does not affect subsequent normal use, significantly reducing transportation losses.

[0023] 2. This explosion-proof LED display screen uses a bracket to stably support the housing, ensuring the stability of the equipment under various working conditions and adapting to multiple on-site installation scenarios. In terms of heat dissipation, the integrated structure of heat-conducting fins and heat dissipation fins quickly conducts the heat generated by the LED beads on the LED strip. At the same time, the inner wall of the drive box is fitted with heat-conducting protrusions to efficiently dissipate the working heat of the drive board and power supply. The dual heat dissipation design effectively avoids the formation of an ignition source due to high temperature, greatly improving the operational safety of the equipment in flammable and explosive environments.

[0024] 3. In terms of explosion-proof performance, the sealing structure of the drive box and the sealing design of the screen components form an all-round explosion-proof protection, preventing external flammable and explosive media from entering the interior. In conjunction with the grounding circuit formed by the explosion-proof wiring terminals on the outside of the shell, static electricity is promptly discharged, avoiding safety hazards caused by sparks from the source. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0026] Figure 1 This is a schematic diagram of an explosion-proof LED display screen according to the present invention;

[0027] Figure 2 This is a schematic diagram of an explosion-proof LED display screen according to the present invention;

[0028] Figure 3 This is a cross-sectional schematic diagram of an explosion-proof LED display screen according to the present invention;

[0029] Figure 4 This is a cross-sectional schematic diagram of an explosion-proof LED display screen according to the present invention;

[0030] Figure 5 This is a cross-sectional schematic diagram of an explosion-proof LED display screen according to the present invention.

[0031] Reference numerals: 1. Outer shell; 2. Heat dissipation fins; 3. Drive box; 4. Bracket; 5. Protective edge strip; 6. Explosion-proof shell; 7. Threaded hole; 8. Lifting lug; 9. Bolt; 10. Reinforcing rib; 11. Screen assembly; 12. LED bead; 13. LED strip; 14. Heat-conducting rib; 15. Flame-retardant reflective film; 16. Drive board; 17. Power supply; 18. Terminal block. Detailed Implementation

[0032] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0033] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0035] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0036] Please see Figure 1-5 This utility model provides a technical solution: an explosion-proof LED display screen, including a shell 1, a bracket 4 fixedly installed at the center of the back of the shell 1, heat dissipation fins 2 laid on the back of the shell 1, and heat-conducting ribs 14 integrally formed with the heat dissipation fins 2 inside the shell 1. The heat-conducting ribs 14 are horizontally distributed along the inner wall of the shell 1. A matching groove is opened on the back of the shell 1, and a sealed explosion-proof drive box 3 is embedded in the groove and located below the bracket 4. The drive box 3 is fastened to the back of the shell 1, and a sealing gasket is sandwiched between the two mating surfaces. A heat-conducting protrusion integral with the heat-conducting ribs 14 is provided in the groove. The inner wall of the drive box 3 is tightly fitted with the heat-conducting protrusion. A drive plate 16 and a power supply 17 are fixedly installed inside the drive box 3. Two [unclear] are fixedly installed on the drive plate 16. An explosion-proof terminal block 18 is provided. A power supply 17 is electrically connected to the terminal block 18 via a wire. A flame-retardant reflective film 15 is laid inside the housing 1. The flame-retardant reflective film 15 is positioned away from the position of the heat-conducting rib 14. Multiple light strips 13 are fixedly installed in a horizontal array inside the housing 1 and are located above the flame-retardant reflective film 15. Each light strip 13 is attached to the heat-conducting rib 14. Multiple arrayed LED beads 12 are fixedly installed on the light strip 13. A screen assembly 11 is sealed and fixedly installed at the front opening of the housing 1. Another explosion-proof terminal block 18 is fixedly installed on the outer wall of the housing 1. The explosion-proof terminal block 18 is electrically connected to the housing 1, the drive box 3, and the screen assembly 11 via wires to form a grounding circuit. A detachable explosion-proof transport component is provided on the housing 1.

[0037] The bracket 4 provides installation support for the entire device, ensuring the housing 1 maintains a stable posture during use. When the light strip 13 is working, the heat emitted by the LED beads 12 is quickly conducted through the heat-conducting ribs 14 that are in contact with the light strip 13. Since the heat-conducting ribs 14 are integrally formed with the heat dissipation fins 2 on the back of the housing 1, the heat is further transferred to the heat dissipation fins 2 and dissipated to the external environment, achieving efficient heat dissipation and preventing high temperatures from becoming an ignition source. The drive box 3 adopts a sealed explosion-proof structure, which is installed in a groove and cooperates with a sealing gasket to prevent external flammable and explosive media from entering the box. At the same time, the inner wall of the drive box 3 is tightly attached to the heat-conducting protrusions, which transfer the heat generated by the drive board 16 and the power supply 17 to the heat dissipation fins 2 through the heat-conducting protrusions and heat-conducting ribs 14 for heat dissipation. Power supply 17 supplies power to explosion-proof terminals 18 on drive board 16 via wires to ensure safe operation of the circuit. Flame-retardant reflective film 15 reflects and focuses the light emitted by LED beads 12 while avoiding heat-conducting ribs 14, improving display brightness. It also has flame-retardant properties to reduce fire risk. Screen assembly 11 on the front of housing 1 ensures light transmission while achieving explosion-proof sealing on the front of housing 1. Explosion-proof terminals 18 on the outer wall of housing 1 form a unified grounding circuit with housing 1, drive box 3, and screen assembly 11 via wires to discharge static electricity generated during equipment operation in a timely manner and prevent static electricity accumulation from generating sparks. Through the synergistic effect of heat dissipation, explosion-proof, sealing, and grounding, safe display in flammable and explosive environments is achieved.

[0038] The explosion-proof transport components include: 5. protective edge strips, 6. explosion-proof shell, 7. threaded holes, 8. lifting lugs, 9. bolts, and 10. reinforcing ribs;

[0039] The explosion-proof housing 6 is a protective structure that is temporarily covered on the outside of the screen assembly 11 during transportation and is removed during normal use. Multiple threaded holes 7 are opened around the explosion-proof housing 6 and at corresponding positions on the outer periphery of the outer shell 1. Bolts 9 are threaded into the threaded holes 7 to detachably fix the explosion-proof housing 6 to the outer shell 1. A temporary sealing gasket is provided at the contact point between the explosion-proof housing 6 and the outer shell 1. The protective edge strip 5 is fixedly installed around the edge of the explosion-proof housing 6. The reinforcing rib 10 is fixedly installed on the front of the explosion-proof housing 6. Two lifting lugs 8 are fixedly installed on the top of the explosion-proof housing 6.

[0040] During transportation, the explosion-proof shell 6 is placed on the outside of the screen assembly 11. The explosion-proof shell 6 and the outer shell 1 are connected by bolts 9 to the threaded holes 7 on the periphery of the explosion-proof shell 6 and the outer shell 1, so that the explosion-proof shell 6 and the outer shell 1 can be detachably fixed. The temporary sealing gasket at the joint can prevent dust, water vapor and other impurities from entering the surface of the screen assembly 11 during transportation. The protective edge strip 5 can buffer the impact of collision on the edge of the explosion-proof shell 6 during transportation. The reinforcing rib 10 can improve the structural strength of the front of the explosion-proof shell 6 and prevent the explosion-proof shell 6 from deforming and damaging the screen assembly 11. The lifting lug 8 can facilitate the handling of the entire display screen by lifting equipment, reducing the difficulty of operation during transportation. After the equipment arrives at the site, the explosion-proof shell 6 can be removed by removing the bolts 9 without affecting the normal installation and use of the display screen. This achieves targeted protection for the screen assembly 11 during transportation and ensures the integrity and explosion-proof performance of the equipment after transportation.

[0041] Among them, the screen component 11 uses explosion-proof tempered glass as the light-transmitting panel. It is fixed to the front opening of the outer shell 1 by a high-strength sealed frame. The joint surface is clamped with an annular seal to form an explosion-proof structure. The glass surface is coated to improve the light transmittance. Combined with the sealed frame buffer structure, it enhances the impact resistance and takes into account both light transmission display and explosion-proof sealing requirements. Common models include DY-120EG and XJ127 mining explosion-proof and intrinsically safe displays.

[0042] Power supply 17 is encapsulated in a sealed explosion-proof drive box 3. The outer shell is made of high-strength metal material, and the joint surface meets the explosion-proof standard. In high-risk environments, intrinsically safe circuits can be used to control the output energy through current and voltage limiting. At the same time, heat dissipation is achieved by the heat-conducting boss and heat-conducting rib 14, ensuring stable power supply and no risk of ignition source. Common models include KDW127 / 24 mining explosion-proof and intrinsically safe power supply and WagoPro2 series industrial explosion-proof power supply.

[0043] The driver board 16 is installed inside the explosion-proof driver box 3. The circuit design meets the intrinsic safety requirements. It uses a multi-channel constant current driver chip to ensure the current consistency of the lamp beads 12. The power supply and signal are isolated through a multi-layer PCB layout to reduce electromagnetic interference. Safe wiring is achieved with the help of explosion-proof terminals 18. Common models include customized industrial explosion-proof driver boards based on the HX5035 design.

[0044] Working principle: The bracket 4 supports the outer shell 1 to keep it stable. When the light strip 13 is working, the heat generated by the lamp bead 12 is transferred to the integrated heat dissipation fin 2 through the attached heat-conducting rib 14. The sealed explosion-proof drive box 3 achieves explosion-proof sealing through the sealing gasket. The heat-conducting protrusion attached to its inner wall conducts heat dissipation from the drive board 16 and the power supply 17. The power supply 17 supplies power to the explosion-proof wiring terminal 18 on the drive board 16. The flame-retardant reflective film 15 focuses the light. The screen assembly 11 is sealed and explosion-proof and ensures display. The explosion-proof wiring terminal 18 on the outside of the outer shell 1 forms a grounding circuit to discharge static electricity. During transportation, the explosion-proof shell 6 is fixed to the outer shell 1 by bolts 9. The protective edge strip 5 and the reinforcing rib 10 protect the screen assembly 11. After it is in place, the explosion-proof shell 6 can be removed for normal use.

[0045] During transportation, the explosion-proof shell 6 is fixed to the outer shell 1 by bolts 9. The protective edge strips 5 and reinforcing ribs 10 can effectively buffer the impact of collisions and improve the structural strength, providing targeted protection for the screen assembly 11. The lifting ears 8 facilitate equipment handling, and the detachable design does not affect subsequent normal use, significantly reducing transportation losses.

[0046] The bracket 4 provides stable support for the housing 1, ensuring the stability of the equipment under various working conditions and adapting to various on-site installation scenarios. In terms of heat dissipation, the integrated structure of the heat-conducting fins 14 and the heat dissipation fins 2 quickly conducts the heat generated by the LED beads 12 on the LED strip 13. At the same time, the heat-conducting protrusions attached to the inner wall of the drive box 3 efficiently dissipate the working heat of the drive board 16 and the power supply 17. The dual heat dissipation design effectively avoids the formation of an ignition source at high temperatures, greatly improving the operational safety of the equipment in flammable and explosive environments.

[0047] In terms of explosion-proof performance, the sealing structure of the drive box 3 and the sealing design of the screen assembly 11 form an all-round explosion-proof protection, preventing external flammable and explosive media from entering the interior. Together with the grounding circuit formed by the explosion-proof wiring terminal 18 on the outside of the shell 1, static electricity is promptly discharged, avoiding safety hazards caused by sparks from the source.

[0048] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An explosion-proof LED display screen comprising a housing (1), characterized in that: A bracket (4) is fixedly installed at the center of the back of the outer shell (1). Heat dissipation fins (2) are laid on the back of the outer shell (1). Heat conduction ribs (14) integrally formed with the heat dissipation fins (2) are provided inside the outer shell (1). The heat conduction ribs (14) are distributed laterally along the inner wall of the outer shell (1). The back of the outer shell (1) is provided with an adaptation groove. The groove is embedded with a sealed explosion-proof drive box (3) and located below the bracket (4). The drive box (3) is fastened to the back of the outer shell (1). A sealing gasket is sandwiched between the two mating surfaces. The groove is provided with a heat-conducting boss integrated with the heat-conducting rib (14). The inner wall of the drive box (3) is tightly fitted with the heat-conducting boss. The drive box (3) is fixedly installed with a drive board (16) and a power supply (17). Two explosion-proof terminals (18) are fixedly installed on the drive board (16). The power supply (17) is electrically connected to the terminals (18) through a wire. The shell (1) is lined with a flame-retardant reflective film (15). The flame-retardant reflective film (15) is positioned away from the heat-conducting ribs (14). Multiple light strips (13) are fixedly installed in a horizontal array inside the outer shell (1) and located above the flame-retardant reflective film (15). Each light strip (13) is attached to the heat-conducting rib (14), and multiple arrayed lamp beads (12) are fixedly installed on the light strip (13). A screen assembly (11) is sealed and fixedly installed at the front opening of the housing (1); another explosion-proof terminal (18) is fixedly installed on the outer side wall of the housing (1). The explosion-proof terminal (18) is electrically connected to the housing (1), the drive box (3), and the screen assembly (11) respectively through wires to form a grounding circuit. A detachable transport explosion-proof component is provided on the housing (1).

2. The explosion-proof LED display screen according to claim 1, characterized in that: The transport explosion-proof assembly includes a protective edge strip (5), an explosion-proof shell (6), a threaded hole (7), a lifting lug (8), a bolt (9), and a reinforcing rib (10). The explosion-proof shell (6) is a protective structure that is temporarily covered on the outside of the screen assembly (11) during transportation and is removed during normal use. The threaded holes (7) are opened around the explosion-proof shell (6) and at corresponding positions on the outer periphery of the outer shell (1). The bolts (9) are threaded into the threaded holes (7) to detachably fix the explosion-proof shell (6) to the outer shell (1).

3. The explosion-proof LED display screen according to claim 2, characterized in that: A temporary sealing gasket is provided at the joint between the explosion-proof shell (6) and the outer shell (1). The protective edge strip (5) is fixedly installed around the perimeter of the explosion-proof shell (6). The reinforcing rib (10) is fixedly installed on the front of the explosion-proof shell (6). The two lifting lugs (8) are fixedly installed above the explosion-proof shell (6).

4. The explosion-proof LED display screen according to claim 1, characterized in that: The drive box (3) is fastened to the back of the outer shell (1) by bolts. The sealing gasket is made of fluororubber and the edge of the sealing gasket is flush with the edge of the joint surface of the drive box (3) and the outer shell (1).

5. The explosion-proof LED display screen according to claim 1, characterized in that: The heat-conducting protrusion extends along the inner wall of the groove, and the extension direction of the heat-conducting protrusion is consistent with the transverse distribution direction of the heat-conducting rib (14). The inner wall of the drive box (3) and the contact surface of the heat-conducting protrusion are planar.

6. The explosion-proof LED display screen according to claim 1, characterized in that: The light strip (13) is fixed inside the housing (1) by a buckle or bolt. The back of the light strip (13) is completely attached to the surface of the heat-conducting rib (14). The lamp beads (12) are positioned facing the screen assembly (11).

7. The explosion-proof LED display screen according to claim 1, characterized in that: The flame-retardant reflective film (15) is adhered to the inner wall of the outer shell (1) by a high-temperature resistant adhesive layer. An avoidance notch is provided on the flame-retardant reflective film (15) at the position corresponding to the heat-conducting rib (14). The size of the avoidance notch is adapted to the cross-sectional size of the heat-conducting rib (14).

8. An explosion-proof LED display screen according to claim 7, characterized in that: The heat dissipation fins (2) are evenly distributed along the longitudinal or transverse direction of the back of the outer shell (1), and the height of the heat dissipation fins (2) gradually decreases from the position close to the drive box (3) to the position far away from the drive box (3).

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