Wall corner plastering device

Abstract

The invention relates to a wall corner plastering device which comprises a plastering angle plate, a connecting assembly and a holding unit. An inserting groove is formed in the bottom end of the plastering angle plate, the inserting groove is matched with the connecting assembly, the connecting assembly is inserted into the inserting groove, the connecting assembly is connected with the plastering angle plate in a pluggable mode, the top end of the holding unit is inserted into the bottom end of the connecting assembly, and the holding unit can rotate relative to the connecting assembly so as to change the use angle of the holding unit; on one hand, the connecting assembly is connected with the plastering angle plate in a pluggable mode, so that the plastering angle plate can be conveniently disassembled and assembled when being damaged, the plastering flatness is improved, the maintenance cost is reduced, on the other hand, the holding unit can rotate relative to the connecting assembly, the holding unit can be freely adjusted in multiple directions, and the plastering effect is improved. And the angle of the holding unit can be adjusted according to different angles of internal and external corners of the wall surface, so that the operation convenience is improved.

Description

Technical Field

[0001] The invention relates to the technical field of building engineering, in particular to a wall corner plastering device. Background Art

[0002] At present, corner plastering refers to the plastering treatment at the corners of the wall. The main purpose is to make the corners flat and smooth, while enhancing the structural strength of the corners and preventing problems such as cracking and falling off. The corners are the intersection of the wall, and the quality of their plastering directly affects the decoration effect and service life of the entire wall.

[0003] The Chinese utility model patent with the announcement number CN221031246U discloses a plastering tool suitable for wall corners. By adjusting the length of the two connected fixed rods, the two bottom plates can be stably contacted with the ground and the top of the house respectively. By adjusting the length of the telescopic rod, the adjusting wheel can drive the pull rope to be in a tight state. When the rope is pulled, the sliding seat can be driven to slide up and down, so that the corner plate can slide straight at the corner for smoothing, so that the device can be adjusted and adapted according to walls of different heights.

[0004] However, in the actual operation process, since plastering is to process the base layer of the wall, and the base layer of the wall may be uneven with concrete gravel, the gravel may scratch and damage the plastering board when plastering, resulting in dents in the plastering during subsequent use. The above-mentioned corner board is set on the sliding seat, it is inconvenient to replace the corner board when it is damaged, affecting the flatness of the plastering. Summary of the invention

[0005] In view of the deficiencies in the prior art, the object of the present invention is to provide a wall corner plastering device, which has the advantage of being able to replace the wall corner plate and improve the flatness of the plastering.

[0006] The above-mentioned inventive object of the present invention is achieved through the following technical scheme: a wall corner plastering device, comprising a plastering corner plate, a connecting assembly and a holding unit; a slot is provided at the bottom end of the plastering corner plate, the slot is adapted to the connecting assembly, the connecting assembly is inserted into the slot, the connecting assembly and the plastering corner plate are pluggable, the top end of the holding unit is inserted into the bottom end of the connecting assembly, and the holding unit can rotate relative to the connecting assembly to change the use angle of the holding unit.

[0007] Preferably, in the corner plastering device provided by the present invention, the connecting component includes a plug plate and a control component, the plug plate is provided with an installation cavity, the bottom end of the plug plate is provided with a connecting port, the connecting port is connected to the installation cavity, one side of the plug plate is provided with a guide port, the guide port is connected to the installation cavity, the first end of the control component is inserted in the installation cavity, the first end of the control component can rotate relative to the plug plate, the second end of the control component is inserted in the guide port, the second end of the control component can slide along the guide port, the third end of the control component extends to the outside through the connecting port, and the third end of the control component can rotate relative to the plug plate.

[0008] Preferably, in the corner plastering device provided by the present invention, the control component includes a driving gear, a driven gear and a transmission mechanism, the driving gear portion is inserted in the connecting port, the driving gear is rotatably connected to the plug plate via a first rotating shaft, the driven gear is inserted in the mounting cavity, the driven gear is rotatably connected to the plug plate via a second rotating shaft, the driving gear is meshed with the driven gear, and the transmission mechanism is arranged between the driven gear and the guide port.

[0009] Preferably, the wall corner plastering device provided by the present invention, the transmission mechanism includes a pin plate, a plurality of transmission tooth plates and threaded teeth, the first end of the pin plate is inserted in the guide opening, the pin plate can slide along the guide opening, the second end of the pin plate extends into the installation cavity, the plurality of transmission tooth plates are arranged on the side of the second end of the pin plate facing the driven gear, the plurality of transmission tooth plates are distributed in a linear array, the threaded teeth are arranged on the side of the driven gear facing the pin plate, and the threaded teeth are matched with the transmission tooth plate; the inner side wall of the slot is provided with a pin groove matched with the pin plate; the rotation of the driving gear drives the driven gear to rotate, and the rotation of the driven gear synchronously drives the threaded teeth to rotate, and the pin plate is driven to slide along the guide opening under the cooperation of the threaded teeth and the transmission tooth plate, so as to realize the locking and opening of the pin plate and the plastering angle plate.

[0010] Preferably, in the corner plastering device provided by the present invention, the diameter of the driving gear is smaller than the diameter of the driven gear.

[0011] Preferably, in the wall corner plastering device provided by the present invention, the inserting plate is a corner plate.

[0012] Preferably, in the corner plastering device provided by the present invention, the holding unit includes a connecting unit and a holding tube, the bottom end of the connecting unit is connected to the top end of the holding tube, the top end of the connecting unit is inserted into the bottom end of the connecting component, and the connecting unit can rotate relative to the connecting component.

[0013] Preferably, in the corner plastering device provided by the present invention, the connecting unit includes a connecting rod and a connecting ball head, the connecting ball head is installed on the top end of the connecting rod, the connecting ball head is inserted into the bottom end of the connecting assembly, the connecting ball head can rotate relative to the connecting assembly, and the bottom end of the connecting rod is connected to the top end of the holding tube.

[0014] Preferably, in the corner plastering device provided by the present invention, the connecting rod comprises a first vertical rod, a second vertical rod and an inclined connecting rod, the connecting ball head is installed at the top end of the first vertical rod, the bottom end of the first vertical rod is connected to one end of the inclined connecting rod, the other end of the inclined connecting rod is connected to the top end of the second vertical rod, and the bottom end of the second vertical rod is connected to the top of the holding tube.

[0015] Preferably, in the corner plastering device provided by the present invention, an adjustment mechanism is provided in the holding tube, the adjustment mechanism includes an adjusting screw and a threaded sleeve, the top end of the adjusting screw is inserted in the holding tube, the adjusting screw can slide relative to the holding tube, the bottom end of the adjusting screw extends to the outside along the center line direction of the holding tube, the threaded sleeve is screwed on the protruding end of the adjusting screw, the threaded sleeve is threadedly connected with the adjusting screw, and the top end of the threaded sleeve contacts with the bottom end of the holding tube; a guide groove is provided on the inner circumferential wall of the holding tube, the guide groove extends along the center line direction of the holding tube, a guide block is provided on the outer circumferential wall near the top end of the adjusting screw, the end of the guide block away from the adjusting screw is inserted in the guide groove, and the guide block can slide along the guide groove; the threaded sleeve is rotated to make the adjusting screw slide along the holding tube, and the adjusting screw drives the guide block to slide along the guide groove.

[0016] To sum up, the beneficial technical effects of the present invention are as follows: the wall corner plastering device provided in the present application comprises a plastering corner plate, a connecting component and a holding unit; a slot is provided at the bottom end of the plastering corner plate, the slot is adapted to the connecting component, the connecting component is inserted into the slot, the connecting component and the plastering corner plate are pluggable connected, the top end of the holding unit is inserted into the bottom end of the connecting component, and the holding unit can be rotated relative to the connecting component to change the use angle of the holding unit; on the one hand, by arranging a pluggable connection between the connecting component and the plastering corner plate, the plastering corner plate can be conveniently disassembled and installed when it is damaged again, thereby improving the flatness of the plastering and reducing the maintenance cost; on the other hand, by arranging the holding unit to be able to rotate relative to the connecting component, the holding unit can be freely adjusted in multiple directions, and the angle of the holding unit can be adjusted according to the different angles of the wall corners, thereby improving the convenience of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1The figure is a schematic diagram of the overall structure of a corner plastering device provided by an embodiment of the present invention.

[0018] Figure 2 It is an exploded view of the corner plastering device provided by an embodiment of the present invention.

[0019] Figure 3 It is a structural schematic diagram of a connection component in a corner plastering device provided by an embodiment of the present invention.

[0020] Figure 4 yes Figure 2 Enlarged view of point A in the middle.

[0021] In the figure, 1, corner plastering device; 10, plastering corner plate; 11, slot; 20, connecting component; 21, plug plate; 211, installation cavity; 212, connecting port; 213, guide port; 214, connecting ball slot; 22, control component; 221, driving gear; 222, driven gear; 223, transmission mechanism; 2231, pin plate; 2232, transmission gear plate; 2233, threaded teeth; 30, holding unit; 31, connecting unit; 311, connecting rod; 3111, first vertical rod; 3112, second vertical rod; 3113, inclined connecting rod; 312, connecting ball head; 32, holding tube; 321, guide slot; 322, adjusting mechanism; 3221, adjusting screw; 3222, threaded sleeve; 3213, guide block. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0023] Reference Figure 1 and Figure 2 , is a wall corner plastering device 1 disclosed by the present invention, comprising a plastering angle plate 10, a connecting component 20 and a gripping unit 30; a slot 11 is provided at the bottom end of the plastering angle plate 10, the slot 11 is adapted to the connecting component 20, the connecting component 20 is inserted into the slot 11, the connecting component 20 and the plastering angle plate 10 are pluggable connected, the top end of the gripping unit 30 is inserted into the bottom end of the connecting component 20, and the gripping unit 30 can rotate relative to the connecting component 20 to change the use angle of the gripping unit 30; on the one hand, by setting the connecting component 20 and the plastering angle plate 10 to be pluggable and connected, the plastering angle plate 10 can be conveniently disassembled and installed when it is damaged again, thereby improving the flatness of the plastering and reducing the maintenance cost; on the other hand, by setting the gripping unit 30 to be able to rotate relative to the connecting component 20, the gripping unit 30 can be freely adjusted in multiple directions, and the angle of the gripping unit 30 can be adjusted according to the different angles of the wall corners, thereby improving the convenience of operation.

[0024] Specifically, a slot 11 recessed inwardly is provided at the center of the bottom end of the plastering angle plate 10 .

[0025] Taking the plane parallel to the bottom surface of the plastering angle plate 10 as the cross section, the cross-sectional shape of the slot 11 can be triangular. Of course, the cross-sectional shape of the slot 11 can also be straight.

[0026] Continue to refer to Figure 3 In this embodiment, the connecting component 20 includes a plug board 21 and a control component 22. A mounting cavity 211 is provided on the plug board 21. A connecting port 212 is provided at the bottom of the plug board 21. The connecting port 212 is connected to the mounting cavity 211. A guide port 213 is provided on one side of the plug board 21. The guide port 213 is connected to the mounting cavity 211. A first end of the control component 22 is inserted into the mounting cavity 211. The first end of the control component 22 can rotate relative to the plug board 21. The second end of the control component 22 is inserted into the guide port 213. The second end of the control component 22 can slide along the guide port 213. The third end of the control component 22 extends to the outside through the connecting port 212. The third end of the control component 22 can rotate relative to the plug board 21.

[0027] Exemplarily, the number of control components 22 may be two, and of course, the number of control components 22 may also be one. In an achievable manner in which the number of control components 22 is two, two installation cavities 211 are provided on the plugboard 21, and the two installation cavities 211 are symmetrically arranged. Two communication ports 212 are provided at the bottom end of the plugboard 21, and the communication ports 212 are arranged in a one-to-one correspondence with the installation cavities 211, and the communication ports 212 are communicated with the corresponding installation cavities 211. Guide ports 213 are provided on opposite sides of the plugboard 21, and the guide ports 213 are arranged in a one-to-one correspondence with the installation cavities, and the guide ports 213 are communicated with the corresponding installation cavities 211.

[0028] Furthermore, in this embodiment, the control component 22 includes a driving gear 221, a driven gear 222 and a transmission mechanism 223. The driving gear 221 is partially inserted in the connecting port 212, the driving gear 221 is rotatably connected to the plug plate 21 through a first rotating shaft, the driven gear 222 is inserted in the mounting cavity 211, the driven gear 222 is rotatably connected to the plug plate 21 through a second rotating shaft, the driving gear 221 is meshed with the driven gear 222, and a transmission mechanism 223 is arranged between the driven gear 222 and the guide port 213.

[0029] It should be noted that the first end of the control component 22 is a driven gear 222 , the second end of the control component 22 is a transmission mechanism 223 , and the third end of the control component 22 is a driving gear 221 .

[0030] The use process of the corner plastering device 1 provided in this embodiment is as follows: the user can hold the holding unit 30 to operate the plastering corner plate 10, so that the plastering corner plate 10 can perform plastering operations on the inner and outer corners of the wall, and the angle of the holding unit 30 can be adjusted at any time for the user to use.

[0031] When the plastering angle plate 10 is damaged and needs to be replaced, the driving gear 221 can be rotated, and the driving gear 221 drives the driven gear 222 to rotate. When the driven gear 222 rotates, the limit between the plug plate 21 and the slot 11 can be released through the transmission mechanism 223, and the connecting component 20 can be pulled out of the slot 11 of the plastering angle plate 10, and the connecting component 20 can be inserted into the slot 11 of the new plastering angle plate 10, and the driving gears 221 on both sides can be reversed to fix the plastering angle plate 10 through the transmission mechanism 223.

[0032] Furthermore, in this embodiment, the transmission mechanism 223 includes a pin plate 2231, a plurality of transmission tooth plates 2232 and threaded teeth 2233. The first end of the pin plate 2231 is inserted into the guide opening 213, the pin plate 2231 can slide along the guide opening 213, the second end of the pin plate 2231 extends into the installation cavity 211, and the plurality of transmission tooth plates 2232 are all arranged on the side of the second end of the pin plate 2231 facing the driven gear 222. The plurality of transmission tooth plates 2232 are distributed in a linear array, and the threaded teeth 2233 are arranged It is placed on the side of the driven gear 222 facing the pin plate 2231, and the threaded teeth 2233 are adapted to the transmission tooth plate 2232; the inner wall of the slot 11 is provided with a pin groove adapted to the pin plate 2231; the driving gear 221 rotates to drive the driven gear 222 to rotate, and the driven gear 222 rotates to synchronously drive the threaded teeth 2233 to rotate, and the pin plate 2231 is driven to slide along the guide opening 213 under the cooperation of the threaded teeth 2233 and the transmission tooth plate 2232 to realize the locking and opening of the pin plate 2231 and the plastering angle plate 10.

[0033] by Figure 3 Taking the shown orientation as an example, the first end of the pin plate 2231 is located at the right end of the pin plate 2231 , and the second end of the pin plate 2231 is located at the left end of the pin plate 2231 .

[0034] When the plastering angle plate 10 is damaged and needs to be replaced, the driving gear 221 is rotated, and the driving gear 221 drives the driven gear 222 to rotate. The rotation of the driven gear 222 synchronously drives the threaded teeth 2233 to rotate, and the threaded teeth 2233 cooperate with the transmission gear plate 2232 to drive the pin plate 2231 to slide along the guide opening 213, so that the pin plate 2231 slides out of the pin groove, and then the connecting component 20 is pulled out of the slot 11 of the plastering angle plate 10, and the connecting component 20 is inserted into the slot 11 of the new plastering angle plate 10, and the driving gears 221 on both sides are reversed to allow the pin plate 2231 to be inserted into the pin groove, so as to lock and fix the plastering angle plate 10.

[0035] In this embodiment, the diameter of the driving gear 221 is smaller than the diameter of the driven gear 222 , so that when the driving gear 221 rotates, it can quickly drive the driven gear 222 to rotate.

[0036] In an implementation in which the cross-sectional shape of the slot 11 is triangular, the inserting plate 21 is adapted to the slot 11 , and the inserting plate 21 is an angle plate.

[0037] Continue to refer to Figure 1 , Figure 2 as well as Figure 4 In this embodiment, the holding unit 30 includes a connecting unit 31 and a holding tube 32. The bottom end of the connecting unit 31 is connected to the top end of the holding tube 32. The top end of the connecting unit 31 is inserted into the bottom end of the connecting component 20. The connecting unit 31 can rotate relative to the connecting component 20.

[0038] Specifically, a connecting ball groove 214 is opened at the center of the bottom end of the inserting plate 21 , and the top end of the connecting unit 31 is inserted into the connecting ball groove 214 , and the top end of the connecting unit 31 can move in the connecting ball groove 214 .

[0039] Furthermore, in this embodiment, the connecting unit 31 includes a connecting rod 311 and a connecting ball head 312. The connecting ball head 312 is installed at the top of the connecting rod 311, and the connecting ball head 312 is inserted into the bottom end of the connecting component 20. The connecting ball head 312 can rotate relative to the connecting component 20, and the bottom end of the connecting rod 311 is connected to the top of the holding tube 32; by setting the connecting ball head 312, the connecting ball head 312 cooperates with the connecting ball groove 214 so that the holding tube 32 can be freely adjusted in multiple directions, and the angle of the holding tube 32 can be adjusted according to the different angles of the wall's positive and negative corners.

[0040] Specifically, the connecting ball head 312 is adapted to the connecting ball groove 214. During the installation process, the connecting ball head 312 is inserted into the connecting ball groove 214. The connecting ball head 312 can move in the connecting ball groove 214, thereby changing the use angle of the holding tube 32 to facilitate the user's operation.

[0041] Furthermore, in this embodiment, the connecting rod 311 includes a first vertical rod 3111, a second vertical rod 3112 and an inclined connecting rod 3113. The top of the first vertical rod 3111 is installed with a connecting ball head 312, the bottom end of the first vertical rod 3111 is connected to one end of the inclined connecting rod 3113, the other end of the inclined connecting rod 3113 is connected to the top of the second vertical rod 3112, and the bottom end of the second vertical rod 3112 is connected to the top of the holding tube 32. Such a configuration makes it easy to adjust the use angle of the holding tube 32.

[0042] Furthermore, in this embodiment, an adjustment mechanism 322 is provided in the gripping tube 32, and the adjustment mechanism 322 includes an adjustment screw 3221 and a threaded sleeve 3222. The top end of the adjustment screw 3221 is inserted into the gripping tube 32, and the adjustment screw 3221 can slide relative to the gripping tube 32. The bottom end of the adjustment screw 3221 extends to the outside along the center line direction of the gripping tube 32. The threaded sleeve 3222 is screwed on the protruding end of the adjustment screw 3221. The threaded sleeve 3222 is threadedly connected to the adjustment screw 3221. The threaded sleeve 3222 is threadedly connected to the adjustment screw 3221. The top end of the tube 3222 contacts the bottom end of the holding tube 32; by rotating the threaded sleeve 3222, the adjusting screw 3221 can slide in the holding tube 32 to adjust the overall length of the adjusting screw 3221 and the holding tube 32; through the cooperation of the threaded sleeve 3222 and the adjusting screw 3221, the total length of the holding tube 32 and the adjusting screw 3221 is adjusted, so that the operator can adjust the total length of the holding tube 32 and the adjusting screw 3221 according to specific needs to achieve the best operating posture and effect.

[0043] Specifically, the center line of the holding tube 32 is arranged in parallel with the center line of the adjusting screw 3221 . In some practicable embodiments, the center line of the holding tube 32 is arranged in a colinear relationship with the center line of the adjusting screw 3221 .

[0044] Among them, a guide groove 321 is opened on the inner wall of the holding tube 32, and the guide groove 321 extends along the center line direction of the holding tube 32. A guide block 3213 is arranged on the outer wall near the top of the adjusting screw 3221. The end of the guide block 3213 away from the adjusting screw 3221 is inserted into the guide groove 321, and the guide block 3213 can slide along the guide groove 321.

[0045] During use, the threaded sleeve 3222 is rotated to make the adjusting screw 3221 slide along the holding tube 32 , and the adjusting screw 3221 drives the guide block 3213 to slide along the guide groove 321 .

[0046] Furthermore, in the present embodiment, a plurality of threaded holes are provided on the outer peripheral wall of the holding tube 32, and the plurality of threaded holes are arranged at intervals along the center line direction of the holding tube 32, and the plurality of threaded holes are all connected with the cavity of the holding tube 32. When the adjusting screw 3221 slides along the holding tube 32 to a preset position, one end of the fastening bolt is screwed into one of the threaded holes, inserted into the holding tube 32 and abutted against the guide block 3213 to lock the adjusting screw 3221 to prevent the adjusting screw 3221 from moving along the holding tube 32.

[0047] The process of replacing the plastering angle plate 10 in the wall corner plastering device 1 provided in this embodiment is: the driving gear 221 is rotated, the driving gear 221 drives the driven gear 222 to rotate, the rotation of the driven gear 222 synchronously drives the threaded teeth 2233 to rotate, and the cooperation of the threaded teeth 2233 and the transmission gear plate 2232 drives the pin plate 2231 to slide along the guide opening 213, so that the pin plate 2231 slides out of the pin groove, and then the connecting component 20 is pulled out of the slot 11 of the plastering angle plate 10, and the connecting component 20 is inserted into the slot 11 of the new plastering angle plate 10, and the driving gears 221 on both sides are reversed to make the pin plate 2231 inserted into the pin groove, so as to lock and fix the plastering angle plate 10.

[0048] The wall corner plastering device 1 provided in the present application comprises a plastering angle plate 10, a connecting component 20 and a holding unit 30; a slot 11 is provided at the bottom end of the plastering angle plate 10, the slot 11 is adapted to the connecting component 20, the connecting component 20 is inserted into the slot 11, the connecting component 20 and the plastering angle plate 10 are pluggable connected, the top end of the holding unit 30 is inserted into the bottom end of the connecting component 20, the holding unit 30 can rotate relative to the connecting component 20 to change the use angle of the holding unit 30; on the one hand, by setting the connecting component 20 and the plastering angle plate 10 to be pluggable and connected, the plastering angle plate 10 can be conveniently disassembled and installed when it is damaged again, thereby improving the flatness of the plastering and reducing the maintenance cost; on the other hand, by setting the holding unit 30 to be able to rotate relative to the connecting component 20, the holding unit 30 can be freely adjusted in multiple directions, and the angle of the holding unit 30 can be adjusted according to the different angles of the wall corners, thereby improving the convenience of operation.

[0049] The wall corner plastering device 1 provided by the present invention has the following advantages: the device has a simple structure, is easy to manufacture, and is convenient to operate.

[0050] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0051] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A wall corner plastering device, characterized in that: It includes a plastering angle plate, a connecting component and a holding unit; A slot is provided at the bottom end of the plastering angle plate, and the slot is adapted to the connecting component. The connecting component is inserted into the slot, and the connecting component and the plastering angle plate are pluggable and connected. The top end of the holding unit is inserted into the bottom end of the connecting component, and the holding unit can be rotated relative to the connecting component to change the use angle of the holding unit.

2. The corner plastering device according to claim 1, characterized in that: The connecting component includes a plug plate and a control component. A mounting cavity is provided on the plug plate. A connecting port is provided at the bottom end of the plug plate, and the connecting port is connected to the mounting cavity. A guide port is provided on one side of the plug plate, and the guide port is connected to the mounting cavity. A first end of the control component is inserted into the mounting cavity, and the first end of the control component can rotate relative to the plug plate. A second end of the control component is inserted into the guide port, and the second end of the control component can slide along the guide port. A third end of the control component extends to the outside through the connecting port, and the third end of the control component can rotate relative to the plug plate.

3. The corner plastering device according to claim 2, characterized in that: The control component includes a driving gear, a driven gear and a transmission mechanism. The driving gear is partially inserted in the connecting port. The driving gear is rotatably connected to the plug plate through a first rotating shaft. The driven gear is inserted in the mounting cavity. The driven gear is rotatably connected to the plug plate through a second rotating shaft. The driving gear is meshed with the driven gear. The transmission mechanism is arranged between the driven gear and the guide port.

4. The corner plastering device according to claim 3, characterized in that: The transmission mechanism comprises a pin plate, a plurality of transmission tooth plates and threaded teeth, the first end of the pin plate is inserted into the guide opening, the pin plate can slide along the guide opening, the second end of the pin plate extends into the installation cavity, the plurality of transmission tooth plates are arranged on the side of the second end of the pin plate facing the driven gear, the plurality of transmission tooth plates are distributed in a linear array, the threaded teeth are arranged on the side of the driven gear facing the pin plate, and the threaded teeth are matched with the transmission tooth plate; The inner side wall of the slot is provided with a pin groove adapted to the pin plate; The rotation of the driving gear drives the driven gear to rotate, and the rotation of the driven gear synchronously drives the threaded teeth to rotate. Under the cooperation of the threaded teeth and the transmission tooth plate, the pin plate is driven to slide along the guide port to achieve locking and opening of the pin plate and the plastering angle plate.

5. The corner plastering device according to any one of claims 3-4, characterized in that: The diameter of the driving gear is smaller than the diameter of the driven gear.

6. The corner plastering device according to claim 2, characterized in that: The inserting plate is an angle plate.

7. The wall corner plastering device according to claim 1, characterized in that: The holding unit includes a connecting unit and a holding tube, the bottom end of the connecting unit is connected to the top end of the holding tube, the top end of the connecting unit is inserted into the bottom end of the connecting component, and the connecting unit can rotate relative to the connecting component.

8. The wall corner plastering device according to claim 7, characterized in that: The connecting unit includes a connecting rod and a connecting ball head, wherein the connecting ball head is installed at the top end of the connecting rod, and the connecting ball head is inserted into the bottom end of the connecting component. The connecting ball head can rotate relative to the connecting component, and the bottom end of the connecting rod is connected to the top end of the holding tube.

9. The wall corner plastering device according to claim 8, characterized in that: The connecting rod includes a first vertical rod, a second vertical rod and an inclined connecting rod. The connecting ball head is installed on the top of the first vertical rod, the bottom end of the first vertical rod is connected to one end of the inclined connecting rod, the other end of the inclined connecting rod is connected to the top of the second vertical rod, and the bottom end of the second vertical rod is connected to the top of the holding tube.

10. The wall corner plastering device according to claim 9, characterized in that: An adjustment mechanism is provided in the holding tube, and the adjustment mechanism includes an adjustment screw and a threaded sleeve. The top end of the adjustment screw is inserted in the holding tube, and the adjustment screw can slide relative to the holding tube. The bottom end of the adjustment screw extends to the outside along the center line direction of the holding tube. The threaded sleeve is screwed on the protruding end of the adjustment screw. The threaded sleeve is threadedly connected with the adjustment screw, and the top end of the threaded sleeve contacts the bottom end of the holding tube. A guide groove is provided on the inner peripheral wall of the holding tube, and the guide groove extends along the center line direction of the holding tube. A guide block is provided on the outer peripheral wall near the top end of the adjusting screw, and one end of the guide block away from the adjusting screw is inserted into the guide groove, and the guide block can slide along the guide groove; The threaded sleeve is rotated to make the adjusting screw slide along the holding tube, and the adjusting screw drives the guide block to slide along the guide groove.

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