An automatic cosmetic filling and sealing machine

Abstract

This utility model relates to the field of cosmetic production technology and discloses an automatic cosmetic filling and sealing machine, including a base. The integrated filling and sealing mechanism includes a push rod mounting block. The bottom of the push rod mounting block is fixedly connected to the top of a protective shell. An adjusting push rod is fixedly connected to the top of the push rod mounting block. A connecting rod is fixedly connected to the driving end of the adjusting push rod. A feeding pipe is fixedly connected inside the protective shell, and a filling head is fixedly connected to the bottom of the feeding pipe. In this utility model, the adjusting push rod, which is fixed to the top of the protective shell by the push rod mounting block, is activated. The adjusting push rod drives the connecting rod, which is fixed to the driving end of the adjusting push rod, to slide. During the sliding of the connecting rod, the filling head and sealing assembly, which are respectively fixed to the left and right ends of the connecting rod, simultaneously come into contact with the filling bottle, thereby achieving synchronous filling and sealing.

Description

Technical Field

[0001] This utility model relates to the field of cosmetic production technology, and in particular to an automatic cosmetic filling and sealing machine. Background Technology

[0002] The field of cosmetic production technology encompasses the entire process of cosmetics production, from raw material formulation and processing to finished product packaging. It covers multiple stages including formula development, emulsification, sterilization, filling, sealing, and labeling. Cosmetic filling and sealing machines are specialized equipment used to quantitatively inject cosmetic materials into packaging containers and seal them. They are key pieces of equipment in the packaging stage of cosmetic production, ensuring the accuracy of material filling and the reliability of container sealing. The two are closely related; the filling and sealing machine is an indispensable component of cosmetic production technology, and its performance directly affects the efficiency of cosmetic production and the quality of the finished product.

[0003] The automatic cosmetic filling and sealing machine mainly consists of a conveying mechanism, a filling system, a sealing system, a control system, and a frame. Its working principle is as follows: the conveying mechanism delivers empty containers to the filling station, where the filling system injects material according to a set quantity. The containers are then conveyed to the sealing station, where sealing is completed by corresponding components. The entire process is automatically coordinated by the control system. In summary, this equipment comprises conveying, filling, sealing, and control components. During operation, the coordinated operation of these components achieves automatic container feeding, quantitative filling, and sealing.

[0004] In existing cosmetic manufacturing technologies, some automatic filling and sealing machines employ a separate filling and sealing operation mode. This means that the quantitative filling process is completed first, and then the filled containers are transferred to the sealing station for sealing. This separate operation method has significant drawbacks: the connection between the two processes requires additional time for container transfer, positioning, and status adjustment, resulting in insufficient continuity of overall equipment operation and a prolonged production cycle. Furthermore, the separate operation increases the difficulty of system coordination due to multiple station switching, easily leading to waiting time between processes. Ultimately, this reduces the product output per unit time, making it difficult to improve overall production efficiency and meet the cosmetic industry's demand for efficient and rapid production. Therefore, this paper proposes an automatic cosmetic filling and sealing machine to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides an automatic cosmetic filling and sealing machine, which aims to improve the problem of slow production pace and low efficiency caused by the separate operation of filling and sealing in some existing automatic cosmetic filling and sealing machines.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an automatic cosmetic filling and sealing machine, comprising a base, a protective shell fixedly connected to the top of the base, an integrated filling and sealing mechanism fixedly connected inside the protective shell, a transmission mechanism fixedly connected inside the base, a clamping mechanism fixedly connected to the top of the base, and a storage box slidably connected to the right side of the base.

[0007] The integrated filling and sealing mechanism includes a push rod mounting block, the bottom of which is fixedly connected to the top of the protective shell. An adjusting push rod is fixedly connected to the top of the push rod mounting block, and a connecting rod is fixedly connected to the driving end of the adjusting push rod. A material conveying pipe is fixedly connected inside the protective shell, and a filling head is fixedly connected to the bottom of the material conveying pipe. A spiral guide plate is fixedly connected inside the filling head, and the outside of the filling head is fixedly connected to the left side of the connecting rod. A sealing assembly is fixedly connected to the right side of the connecting rod, and a solenoid valve is fixedly connected to the outside of the material conveying pipe.

[0008] As a further description of the above technical solution: the transmission mechanism includes a third motor, the third motor is externally fixedly connected to the inside of the base, the drive end of the third motor is fixedly connected to a drive shaft, a transmission belt is rotatably connected to the inside of the base, a drive shaft is fixedly connected to the front side of the transmission belt, a belt is fixedly connected to the inside of the drive shaft and the drive shaft, a plurality of filling bottles are slidably connected to the inside of the base, the bottom of the filling bottles is in contact with the top of the transmission belt, a protective block is fixedly connected to the front side of the base, and the drive shaft and the drive shaft are rotatably connected to the inside of the protective block.

[0009] As a further description of the above technical solution: the clamping mechanism includes multiple second motors, the external parts of which are fixedly connected to the interior of the base, the drive ends of which are fixedly connected to intercepting blocks, the top of the base is fixedly connected to multiple supporting mounting blocks, the interior of which is fixedly connected to a supporting push rod, the drive end of which is fixedly connected to a supporting block, the second motors and the supporting mounting blocks are respectively located inside the front and rear sides of the base, and the protective shell is slidably connected to an observation component;

[0010] As a further description of the above technical solution: the sealing assembly includes a mounting shell, the left side of which is fixedly connected to the right side of the connecting rod, an unwinding roller rotatably connected inside the mounting shell, a take-up roller rotatably connected inside the mounting shell, a first motor fixedly connected to the top right side of the connecting rod, the drive end of the first motor fixedly connected to the inside of the take-up roller, a sealing film slidably connected inside both the unwinding roller and the take-up roller, a sealing push rod fixedly connected inside the mounting shell, a sealing support block fixedly connected to the drive end of the sealing push rod, and a heating ring fixedly connected to the bottom of the sealing support block;

[0011] As a further description of the above technical solution: the observation component includes an observation sliding block, the outside of which is slidably connected to the inside of the protective shell, the inside of which is an observation port, the inside of which is a sliding groove, and the upper and lower sides of which are both provided with guide grooves, the outside of which is slidably connected to the inside of the sliding groove, and the upper and lower sides of which are provided with guide blocks, the outside of which is slidably connected to the inside of the guide groove;

[0012] As a further description of the above technical solution: a T-shaped transfer groove is provided inside the base, the outside of the conveyor belt is rotatably connected to the inside of the T-shaped transfer groove, and the outside of the plurality of filling bottles is slidably connected to the inside of the T-shaped transfer groove.

[0013] As a further description of the above technical solution: a film groove is provided inside the mounting shell, the outer part of the sealing film is slidably connected to the inside of the film groove, a sliding groove is provided inside the mounting shell, and the outer part of the sealing support block is slidably connected to the inside of the sliding groove;

[0014] As a further description of the above technical solution: a T-shaped connecting groove is provided inside the base, and a connecting block is provided on the left side of the storage box. The outside of the connecting block is slidably connected to the inside of the T-shaped connecting groove.

[0015] This utility model has the following beneficial effects:

[0016] 1. In this utility model, the adjusting push rod, which is fixed to the top of the protective shell by the push rod mounting block, is activated. The adjusting push rod drives the connecting rod fixed to the driving end of the adjusting push rod to slide. During the sliding of the connecting rod, the filling head and sealing assembly, which are respectively fixed to the left and right ends of the connecting rod, simultaneously come into contact with the filling bottle, thereby realizing the synchronous filling and sealing. The observation sliding block, which is slidably connected inside the protective shell, reduces the difficulty of subsequent maintenance of the filling head and sealing assembly through the cooperation of the sliding groove inside the protective shell.

[0017] 2. In this utility model, during filling and sealing, the second motor fixed inside the base is started, which drives the intercepting block fixed at the drive end of the second motor to rotate, thereby restricting the filling bottle. Then, the support push rod fixed inside the support mounting block is started, pushing the support block to protect the filling bottle and also preventing the filling bottle from tipping over. The restriction of the filling bottle by the support block and the intercepting block can prevent the filling bottle from being misaligned with the filling head and sealing components, thus reducing the final sealing and filling effect. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of an automatic cosmetic filling and sealing machine proposed in this utility model;

[0019] Figure 2 This is a schematic diagram of the filling bottle structure of an automatic cosmetic filling and sealing machine proposed in this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the interception block of an automatic cosmetic filling and sealing machine proposed in this utility model;

[0021] Figure 4 This is a schematic diagram of the unwinding roller of an automatic cosmetic filling and sealing machine proposed in this utility model.

[0022] Legend:

[0023] 1. Base; 2. Protective shell; 3. Push rod mounting block; 4. Adjusting push rod; 5. Feed pipe; 6. Connecting rod; 7. Solenoid valve; 8. Spiral guide plate; 9. Filling head; 10. First motor; 11. Mounting shell; 12. Take-up roller; 13. Unwound roller; 14. Sealing film; 15. Sealing push rod; 16. Sealing support block; 17. Heating ring; 18. Support mounting block; 19. Support push rod; 20. Support block; 21. Second motor; 22. Interception block; 23. Third motor; 24. Drive shaft; 25. Belt; 26. Transmission shaft; 27. Conveyor belt; 28. Filling bottle; 29. ​​Observation sliding block; 30. Protective block; 31. Storage box. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Reference Figure 1 , Figure 3 , Figure 4This utility model provides an embodiment of an automatic cosmetic filling and sealing machine, comprising a base 1. The base 1 serves as the main support for the entire automatic filling and sealing machine, providing a stable base structure. A protective shell 2 is fixedly connected to the top of the base 1. The protective shell 2 is fixed to the top of the base 1, serving to protect the integrated filling and sealing mechanism inside the equipment, preventing external objects from entering, and ensuring the safe operation of the machine. An integrated filling and sealing mechanism is fixedly connected inside the protective shell 2. This integrated filling and sealing mechanism is the core part of the equipment, integrating filling and sealing functions. The base 1 is fixedly connected to... The conveying mechanism is responsible for conveying the filling bottles 28, ensuring that each bottle can be accurately moved to the appropriate position for filling and sealing operations. A clamping mechanism is fixedly connected to the top of the base 1, which is responsible for firmly fixing the filling bottles 28 in the appropriate position to ensure that the bottles do not shift during the filling and sealing process. A storage box 31 is slidably connected to the right side of the base 1. The storage box 31 is located on the right side of the base 1 and is used to store the bottles that have been filled and sealed. A T-shaped connecting groove is opened inside the base 1. A connecting block is provided on the left side of the storage box 31. The outside of the connecting block is slidably connected to the inside of the T-shaped connecting groove.

[0026] The integrated filling and sealing mechanism includes a push rod mounting block 3, which supports the push rod and connects to the protective shell 2. The bottom of the push rod mounting block 3 is fixedly connected to the top of the protective shell 2. An adjusting push rod 4 is fixedly connected to the top of the push rod mounting block 3. By adjusting the push rod 4, the pushing force during the filling and sealing process can be controlled to ensure the filling volume and sealing effect of each bottle. A connecting rod 6 is fixedly connected to the drive end of the adjusting push rod 4, connecting the filling head 9 and the sealing assembly together to achieve synchronous adjustment of filling and sealing. A conveying pipe 5 is fixedly connected inside the protective shell 2, and the bottom of the conveying pipe 5 is fixed... A filling head 9 is connected to the bottle, and a spiral guide plate 8 is fixedly connected inside the filling head 9. The filling head 9 is used to accurately fill cosmetics into the bottle. The internal spiral guide plate 8 can effectively guide the fluid, reduce overflow and waste, and reduce air bubbles generated in the cosmetics due to excessive flow rate. The filling head 9 is fixedly connected to the left side of the connecting rod 6, and a sealing assembly is fixedly connected to the right side of the connecting rod 6. The sealing assembly is used to seal the bottle after filling, ensuring the bottle mouth is sealed and preventing leakage of contents. A solenoid valve 7 is fixedly connected to the outside of the feed pipe 5. The feed pipe 5 is responsible for conveying cosmetic raw materials to the filling head 9. The solenoid valve 7 controls the opening and closing of the feed pipe 5 to ensure accurate filling volume.

[0027] The sealing assembly includes a mounting shell 11, which serves as the outer casing of the sealing assembly and supports the installation of the unwinding roller 13 and the take-up roller 12. The left side of the mounting shell 11 is fixedly connected to the right side of the connecting rod 6. The unwinding roller 13 and the take-up roller 12 are rotatably connected inside the mounting shell 11. The unwinding roller 13 is used to unwind the sealing film 14, and the take-up roller 12 is used to retract the waste portion of the sealing film 14. The two rollers ensure smooth sealing of the film 14. A first motor 10 is fixedly connected to the top right side of the connecting rod 6. A motor 10 drives a take-up roller 12 to ensure stable tension and speed of the sealing film 14. The drive end of the first motor 10 is fixedly connected inside the take-up roller 12. The sealing film 14 is slidably connected inside both the unwind roller 13 and the take-up roller 12. A sealing push rod 15 is fixedly connected inside the mounting housing 11. A sealing support block 16 is fixedly connected to the drive end of the sealing push rod 15. A heating ring 17 is fixedly connected to the bottom of the sealing support block 16. The sealing push rod 15 applies pressure through the sealing support block 16 to fix the sealing film 14 and seal the bottle mouth. The heating ring 17 at the bottom of the sealing support block 16 provides heat to help the heat sealing effect during the sealing process. A film groove is opened inside the mounting housing 11. The outside of the sealing film 14 is slidably connected inside the film groove. A sliding groove is opened inside the mounting housing 11. The film groove and the sliding groove are used to install the sealing film 14 and achieve sealing through the sealing push rod 15. The outside of the sealing support block 16 is slidably connected inside the sliding groove.

[0028] Reference Figures 1 to 3 The transmission mechanism includes a third motor 23, which drives the entire transmission mechanism and provides power to the filling bottles 28. The third motor 23 is externally fixedly connected to the inside of the base 1. A drive shaft 24 is fixedly connected to the drive end of the third motor 23. A transmission belt 27 is rotatably connected inside the base 1. A drive shaft 26 is fixedly connected to the front of the transmission belt 27. A belt 25 is fixedly connected to the drive shaft 26 and the drive shaft 24. The drive shaft 24 and the drive shaft 26 transmit power to the transmission belt 27 to ensure the stable operation of the transmission belt 27. The base 1... Multiple filling bottles 28 are internally slidably connected. The filling bottles 28 are mounted on the conveyor belt 27 and slide through the T-shaped transfer groove to ensure a smooth filling process. The bottom of the filling bottle 28 is in contact with the top of the conveyor belt 27. A protective block 30 is fixedly connected to the front side of the base 1. The external rotatable connection of the drive shaft 24 and the transmission shaft 26 is inside the protective block 30. A T-shaped transfer groove is opened inside the base 1. The external rotatable connection of the conveyor belt 27 is inside the T-shaped transfer groove. The external slidable connection of the multiple filling bottles 28 is inside the T-shaped transfer groove.

[0029] The clamping mechanism includes multiple second motors 21, which control the movement of the intercepting block 22 to ensure that the clamping mechanism can firmly fix the bottle. The external parts of the multiple second motors 21 are fixedly connected to the inside of the base 1. The drive ends of the multiple second motors 21 are fixedly connected to the intercepting block 22. The top of the base 1 is fixedly connected to multiple support mounting blocks 18. The support mounting blocks 18 are fixedly connected to the inside of the support pushing rods 19. The support mounting blocks 18 and the support pushing rods 19 adjust the fixed position of the bottle as needed to ensure that each bottle can accurately receive filling and complete the sealing operation. The drive end of the support pushing rods 19 is fixedly connected to the support block 20, which provides additional support for the bottle to prevent it from tilting or shaking during processing. The second motors 21 and the support mounting blocks 18 are located inside the front and rear sides of the base 1, respectively. The protective shell 2 is slidably connected to the observation component, which provides the operator with a channel to observe the machine's operating status and ensure the smooth progress of the filling and sealing process.

[0030] The observation assembly includes an observation sliding block 29, which can slide inside the protective shell 2, making the viewing angle of the observation port more flexible. The external side of the observation sliding block 29 is slidably connected to the inside of the protective shell 2. An observation port is opened inside the observation sliding block 29. A sliding groove is opened inside the protective shell 2. Guide grooves are opened on both the upper and lower sides of the sliding groove. The external side of the observation sliding block 29 is slidably connected to the inside of the sliding groove. Guide blocks are provided on the upper and lower sides of the observation sliding block 29. The external side of the guide blocks is slidably connected to the inside of the guide groove. Through the cooperation of the upper and lower guide grooves and guide blocks, the stable sliding of the observation sliding block 29 is ensured, which facilitates the observer to check the filling and sealing process.

[0031] Working principle: The third motor 23 fixed inside the base 1 starts, and drives the drive shaft 24 fixed at the drive end of the third motor 23 to rotate. The drive shaft 24 transmits the rotational force to the transmission shaft 26 through the belt 25, causing the transmission shaft 26 to rotate. Then the transmission shaft 26 drives the conveyor belt 27 fixed inside the transmission shaft 26 to rotate. The rotation of the conveyor belt 27 causes the filling bottle 28 connected to the outside of the conveyor belt 27 to slide, thereby realizing the automated feeding of the filling bottle 28.

[0032] Before filling and sealing, two second motors 21 fixed inside the base 1 on the front and rear sides are started. The second motors 21 drive the intercepting block 22 fixed to the drive end of the second motor 21 to rotate, thereby intercepting the filling bottle 28. In order to prevent the filling bottle 28 from tipping over, the support push rod 19 fixed to the top of the base 1 by the support mounting block 18 is started, pushing the support block 20 fixed to the drive end of the support push rod 19 to slide, thereby cooperating with the intercepting block 22 to clamp the filling bottle 28. At the same time, the opening of the clamped filling bottle 28 corresponds to the bottom of the filling head 9 and the sealing assembly, thereby preventing the filling bottle 28 from being misaligned with the filling head 9 and the sealing assembly, which would reduce the final sealing and filling effect.

[0033] The protective shell 2, fixed to the top of the base 1, serves as both protection and support. An adjusting push rod 4, fixed to the top of the protective shell 2 by a push rod mounting block 3, is activated, causing the connecting rod 6, fixed to the drive end of the adjusting push rod 4, to slide. The cosmetics flow through the feed pipe 5 to the filling head 9, fixed to the left side of the connecting rod 6, and are then filled into the filling bottle 28. The spiral guide plate 8, fixed inside the filling head 9, with its threaded design, prevents air bubbles from forming during the filling process due to excessive flow rate.

[0034] The mounting shell 11, fixed to the right side of the connecting rod 6, serves as a support for the sealing assembly. During sealing, the first motor 10, fixed to the top right side of the connecting rod 6, is activated. The first motor 10 drives the take-up roller 12, which is fixed to the drive end of the first motor 10, to rotate, thereby pulling the sealing film 14 to slide. When the bottom of the sealing film 14 contacts the top of the filling bottle 28, the sealing push rod 15, fixed inside the mounting shell 11, is activated. The sealing push rod 15 pushes the sealing support block 16, which is fixed to the drive end of the sealing push rod 15, to slide. This causes the heating ring 17 at the bottom of the sealing support block 16 to heat the sealing film 14, thereby achieving the sealing effect of the sealing film 14 on the filling bottle 28. Finally, the sealed filling bottle 28 falls into the storage box 31, which is slidably connected inside the base 1.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An automatic cosmetic filling and sealing machine comprising a base (1), characterized in that: The base (1) is fixedly connected to a protective shell (2), the protective shell (2) is fixedly connected to an integrated filling and sealing mechanism, the base (1) is fixedly connected to a transmission mechanism, the base (1) is fixedly connected to a clamping mechanism, and the base (1) is slidably connected to a storage box (31) on the right side. The integrated filling and sealing mechanism includes a push rod mounting block (3), the bottom of which is fixedly connected to the top of the protective shell (2), an adjusting push rod (4) is fixedly connected to the top of the push rod mounting block (3), a connecting rod (6) is fixedly connected to the driving end of the adjusting push rod (4), a conveying pipe (5) is fixedly connected inside the protective shell (2), a filling head (9) is fixedly connected to the bottom of the conveying pipe (5), a spiral guide plate (8) is fixedly connected inside the filling head (9), the outside of the filling head (9) is fixedly connected to the left side of the connecting rod (6), a sealing assembly is fixedly connected to the right side of the connecting rod (6), and a solenoid valve (7) is fixedly connected to the outside of the conveying pipe (5).

2. The automatic cosmetic filling and sealing machine according to claim 1, characterized in that: The transmission mechanism includes a third motor (23), which is externally fixedly connected to the inside of the base (1). The drive end of the third motor (23) is fixedly connected to a drive shaft (24). A transmission belt (27) is rotatably connected inside the base (1). A drive shaft (26) is fixedly connected to the front side of the transmission belt (27). A belt (25) is fixedly connected inside the drive shaft (26) and the drive shaft (24). A plurality of filling bottles (28) are slidably connected inside the base (1). The bottom of the filling bottle (28) is in contact with the top of the transmission belt (27). A protective block (30) is fixedly connected to the front side of the base (1). The drive shaft (24) and the drive shaft (26) are rotatably connected inside the protective block (30).

3. The automatic cosmetic filling and sealing machine according to claim 1, characterized in that: The clamping mechanism includes multiple second motors (21), which are externally fixedly connected to the interior of the base (1). The drive ends of the multiple second motors (21) are fixedly connected to intercepting blocks (22). Multiple support mounting blocks (18) are fixedly connected to the top of the base (1). Support push rods (19) are fixedly connected inside the support mounting blocks (18). Support blocks (20) are fixedly connected to the drive ends of the support push rods (19). The second motors (21) are located inside the front and rear sides of the base (1). The protective shell (2) is slidably connected to an observation component.

4. The automatic cosmetic filling and sealing machine according to claim 1, characterized in that: The sealing assembly includes a mounting shell (11), the left side of which is fixedly connected to the right side of the connecting rod (6). An unwinding roller (13) is rotatably connected inside the mounting shell (11), and a winding roller (12) is rotatably connected inside the mounting shell (11). A first motor (10) is fixedly connected to the top right side of the connecting rod (6). The drive end of the first motor (10) is fixedly connected inside the winding roller (12). A sealing film (14) is slidably connected inside the winding roller (12). A sealing push rod (15) is fixedly connected inside the mounting shell (11). A sealing support block (16) is fixedly connected to the drive end of the sealing push rod (15). A heating ring (17) is fixedly connected to the bottom of the sealing support block (16).

5. The automatic cosmetic filling and sealing machine according to claim 3, characterized in that: The observation component includes an observation sliding block (29), which is externally slidably connected to the inside of the protective shell (2). An observation port is provided inside the observation sliding block (29), and a sliding groove is provided inside the protective shell (2). Guide grooves are provided on both the upper and lower sides of the sliding groove. The external side of the observation sliding block (29) is slidably connected to the inside of the sliding groove. Guide blocks are provided on both the upper and lower sides of the observation sliding block (29), and the external side of the guide blocks is slidably connected to the inside of the guide groove.

6. The automatic cosmetic filling and sealing machine according to claim 2, characterized in that: The base (1) has a T-shaped transmission groove inside, the outside of the transmission belt (27) is rotatably connected to the inside of the T-shaped transmission groove, and the outside of the multiple filling bottles (28) is slidably connected to the inside of the T-shaped transmission groove.

7. The cosmetic automatic filling and sealing machine according to claim 4, characterized in that: The mounting shell (11) has a film groove inside, the sealing film (14) is slidably connected to the inside of the film groove, the mounting shell (11) has a sliding groove inside, and the sealing support block (16) is slidably connected to the inside of the sliding groove.

8. The cosmetic automatic filling and sealing machine according to claim 1, characterized in that: The base (1) has a T-shaped connecting groove inside, and the storage box (31) has a connecting block on the left side. The outside of the connecting block is slidably connected to the inside of the T-shaped connecting groove.

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