Conveying mechanism capable of automatically and uniformly sequencing products

Abstract

The utility model belongs to the technical field of conveying, and particularly relates to a conveying mechanism capable of automatically and uniformly sequencing products, which comprises a conveying frame. A plurality of conveying belts are arranged in the middle of the conveying frame; a support is fixedly connected to the end of the conveying frame. A moving groove is formed in the middle of the support. A first motor is mounted at the end part of the bracket; the output end of the first motor penetrates through the end part of the bracket; the output end of the first motor is fixedly connected with an adjusting screw rod; the adjusting lead screw is rotationally connected to the middle of the moving groove. A nut is mounted in the middle of the adjusting screw rod; the middle part of the nut is fixedly connected with a sliding block; by means of the structure, the products are conveyed to the multiple conveying belts according to the preset sequence, the follow-up production or treatment process can be more orderly, the situation that the single conveying belt is overloaded can be effectively reduced by evenly distributing the products to the multiple conveying belts, and therefore the overall production efficiency is improved, and automatic sorting of the products is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of conveying technology, specifically a conveying mechanism for automatically and uniformly sorting products. Background Technology

[0002] Conveying mechanisms are important equipment used for material handling and conveying in various fields such as industrial production, warehousing and logistics.

[0003] Conveying mechanisms are divided into belt conveyors, chain conveyors, and roller conveyors. Commonly used belt conveyors use traditional rollers and tensioning devices to tension the conveyor belt, which then wraps around idlers to transport materials. Belt conveyors have a simple structure, run smoothly during material transport, and have a large conveying capacity.

[0004] Traditional conveying mechanisms consist of simple mechanical structures that typically transport materials from one location to another. When the material input is large, it is prone to accumulation, causing problems such as poor operation or blockage during the conveying process.

[0005] Therefore, this utility model provides a conveying mechanism for automatically and uniformly sorting products. Utility Model Content

[0006] In order to overcome the shortcomings of the existing technology and solve the problem mentioned in the background technology that a large amount of material is prone to accumulate during transportation, leading to transportation blockage.

[0007] The technical solution adopted by this utility model to solve its technical problem is as follows: A conveying mechanism for automatic and uniform sorting of products, comprising a conveying frame; multiple conveyor belts are provided in the middle of the conveying frame; a support is fixedly connected to the end of the conveying frame; a moving groove is opened in the middle of the support; a first motor is installed at the end of the support; the output end of the first motor passes through the end of the support; an adjusting screw is fixedly connected to the output end of the first motor; the adjusting screw is rotatably connected to the middle of the moving groove; a nut is installed in the middle of the adjusting screw; a slider is fixedly connected to the middle of the nut; the slider is slidably connected in the middle of the moving groove; a feeding bin is fixedly connected to the top of the slider; a guide plate is fixedly connected to the middle of the feeding bin; a discharge port is opened on the side wall of the feeding bin; a material leveling component is installed in the middle of the feeding bin; and a buffer component is provided in the middle of the conveying frame. Through the above structure, products are conveyed to multiple conveyor belts in a predetermined order, making subsequent production or processing more orderly. By uniformly distributing products to multiple conveyor belts, the overload of a single conveyor belt can be effectively reduced, thereby improving overall production efficiency and realizing automatic sorting of products.

[0008] Preferably, the material leveling component includes a second motor; the second motor is installed on the side wall of the feeding hopper; the output end of the second motor passes through the middle of the feeding hopper; a rotating shaft is fixedly connected to the output end of the second motor; one end of the rotating shaft is rotatably connected to the inner side wall of the feeding hopper; multiple baffles are fixedly connected to the middle of the rotating shaft; the multiple baffles are equidistantly distributed; the baffles are located in the middle of the discharge port; the above structure can quickly and accurately feed products into the conveyor belt, so that each product is pushed with the same force and direction, and the baffles can push the products one by one through the preset rotation speed, so as to achieve uniform distribution of products and reduce the problem of damage caused by product accumulation during conveying.

[0009] Preferably, the buffer assembly includes multiple sets of springs; the multiple sets of springs are disposed on the inner side wall of the conveyor frame; each set of springs is disposed on both sides of the conveyor belt; a sponge plate is fixedly connected to the end of each set of springs; multiple sets of airbags are installed on the inner side wall of the conveyor frame; the airbags are disposed on the outside of the sponge plate; an air inlet valve is fixedly connected to the middle of the airbag; through the above structure, the airbags have a certain elasticity and buffering capacity, which can absorb the impact force of the product on both sides of the conveyor belt during the conveying process, reduce the damage to the product caused by collision, absorb and disperse the impact force, so that the product is conveyed to the next stage more smoothly, reduce the resistance and friction encountered during the conveying process, thereby improving the conveying speed.

[0010] Preferably, a water storage tank is fixedly connected to the side wall of the conveyor frame; the water storage tank is fixedly connected to one end near the support; a water inlet pipe is fixedly connected to the top of the water storage tank; a drain pipe is fixedly connected to the middle of the water storage tank; the end of the drain pipe is fixedly connected to the middle of the conveyor frame; multiple spray heads are fixedly connected to the middle of the drain pipe; the multiple spray heads are equidistantly distributed; a fixing plate is fixedly connected to the end of the conveyor frame; a scraper is fixedly connected to the top of the fixing plate; the scraper is in contact with the surface of the conveyor belt; through the above structure, the multiple spray heads can spray an appropriate amount of water mist onto the corresponding surface of the conveyor belt, and the scraper, which is close to the bottom of the conveyor belt, effectively scrapes away residual materials or dirt on the surface of the conveyor belt, keeping the conveyor belt clean and reducing blockage or damage caused by material accumulation on the surface of the conveyor belt.

[0011] Preferably, a heating chamber is fixedly connected to the side wall of the support; multiple through holes are opened in the middle of the heating chamber; a fan is installed on the inner side wall of the heating chamber; a heating rod is installed on the inner side wall of the heating chamber; an exhaust pipe is fixedly connected to the middle of the heating chamber; the exhaust pipe is fixedly connected to one side of the heating rod; an exhaust groove is opened in the middle of the exhaust pipe; the above structure can effectively remove the residual moisture after cleaning by drying the surface of the conveyor belt, reduce the corrosion problem caused by moisture on the surface of the conveyor belt, and reduce the contamination of the products transported subsequently by the residual moisture.

[0012] Preferably, the top of the fixing plate is provided with an installation groove; a collection box is installed in the middle of the installation groove; through the above structure, as the conveyor belt moves continuously, the debris adhering to the bottom of the conveyor belt will be continuously scraped into the collection box, effectively reducing the amount of debris and water mist scattered in the working area, and reducing the workload of cleaning and maintenance of the working area.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. The conveying mechanism for automatic and uniform sorting of products described in this utility model enables products to be conveyed onto multiple conveyor belts in a predetermined order through the above structure, which can make the subsequent production or processing flow more orderly. By uniformly distributing products onto multiple conveyor belts, the overload of a single conveyor belt can be effectively reduced, thereby improving the overall production efficiency and realizing automatic sorting of products.

[0015] 2. The automatic and uniform sorting conveying mechanism for products described in this utility model can quickly and accurately feed products into the conveyor belt through the above structure, so that each product is pushed with the same force and direction. The preset rotation speed can make the pusher plate push the products one by one, so as to achieve uniform distribution of products and reduce the problem of damage caused by product accumulation during conveying. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is a perspective view of the present invention;

[0018] Figure 2 This is a schematic diagram of the material leveling component in this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the buffer component in this utility model;

[0020] Figure 4 This is a cross-sectional view of the heating chamber in this utility model;

[0021] Figure 5 This is a schematic diagram of the scraper structure in this utility model.

[0022] In the diagram: 1. Conveyor frame; 10. Conveyor belt; 11. Support; 12. Moving trough; 13. First motor; 14. Adjusting screw; 15. Nut; 16. Slider; 17. Feeding bin; 18. Guide plate; 19. Discharge port; 2. Material leveling assembly; 21. Second motor; 22. Rotating shaft; 23. Pulley; 3. Buffer assembly; 31. Spring; 32. Sponge board; 33. Airbag; 34. Air inlet valve; 4. Water storage tank; 41. Water inlet pipe; 42. Drain pipe; 43. Spray head; 44. Fixing plate; 45. Scraper; 5. Heating chamber; 51. Through hole; 52. Fan; 53. Heating rod; 54. Exhaust pipe; 55. Exhaust trough; 6. Mounting slot; 61. Collection box; 7. Elastic pad. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] like Figures 1 to 5As shown, an embodiment of the present invention provides a conveying mechanism for automatically and uniformly sorting products, including a conveyor frame 1; a plurality of conveyor belts 10 are provided in the middle of the conveyor frame 1; a bracket 11 is fixedly connected to the end of the conveyor frame 1; a moving groove 12 is provided in the middle of the bracket 11; a first motor 13 is installed at the end of the bracket 11; the output end of the first motor 13 passes through the end of the bracket 11; an adjusting screw 14 is fixedly connected to the output end of the first motor 13; the adjusting screw 14 is rotatably connected to the middle of the moving groove 12; a nut 15 is installed in the middle of the adjusting screw 14; a sliding contact is fixedly connected in the middle of the nut 15. Block 16; Slider 16 is slidably connected in the middle of the moving groove 12; Feeding bin 17 is fixedly connected to the top of slider 16; Guide plate 18 is fixedly connected to the middle of feeding bin 17; Discharge port 19 is opened on the side wall of feeding bin 17; Material leveling component 2 is installed in the middle of feeding bin 17; Buffer component 3 is provided in the middle of conveyor frame 1; During operation, the product is put into the feeding bin 17, and the product slides into the discharge port 19 through guide plate 18. The product is separated by material leveling component 2, and the first motor 13 is turned on at the same time; The output end of the first motor 13 drives adjusting screw 14. The moving trough 12 rotates in the middle, causing the nut 15 to move inside the adjusting screw 14. The nut 15 drives the slider 16 to slide in the middle of the bracket 11. The slider 16 moves the feeding bin 17 to one side, at which point the product is discharged from the outlet 19 into the corresponding conveyor belt 10 for transport. After the feeding bin 17 moves to one side, the output of the first motor 13 reverses the driving force of the adjusting screw 14, causing the feeding bin 17 to move to the other side via the nut 15, thus reciprocating the movement of the feeding bin 17. Products are fed onto conveyor belts 10 in sequence. The even distribution component 2 ensures that the products are evenly distributed on the conveyor belts 10. As the products move in the middle of the conveyor belts 10, the buffer component 3 provides cushioning and protection. This structure allows products to be conveyed onto multiple conveyor belts 10 in a predetermined order, making subsequent production or processing more orderly. By evenly distributing products onto multiple conveyor belts 10, the overload of a single conveyor belt 10 can be effectively reduced, thereby improving overall production efficiency and achieving automatic product sorting.

[0025] like Figure 2As shown, the material leveling assembly 2 includes a second motor 21; the second motor 21 is installed on the side wall of the feeding bin 17; the output end of the second motor 21 passes through the middle of the feeding bin 17; a rotating shaft 22 is fixedly connected to the output end of the second motor 21; one end of the rotating shaft 22 is rotatably connected to the inner side wall of the feeding bin 17; multiple baffles 23 are fixedly connected to the middle of the rotating shaft 22; the multiple baffles 23 are equidistantly distributed; the baffles 23 are located in the middle of the discharge port 19; during operation, when the product continuously enters the feeding bin 17 and is discharged from the discharge port 19, the second motor 21 is turned on, and the output end of the second motor 21 drives the rotating shaft 22 to rotate, through the rotating shaft The second motor 22 rotates with multiple paddles 23, which move the products and control the rotation speed of the output end of the second motor 21. When the discharge port 19 moves to the corresponding position of the conveyor belt 10, the paddles 23 rotate to push the products onto the conveyor belt 10, so that the products are evenly distributed in the middle of the conveyor belt 10. Through the above structure, the products can be quickly and accurately fed into the conveyor belt 10, so that each product is pushed with the same force and direction. The preset rotation speed can make the paddles 23 move the products one by one, achieving uniform distribution of products and reducing the problem of damage caused by product accumulation during transportation.

[0026] like Figures 3 to 5 As shown, the buffer assembly 3 includes multiple sets of springs 31; multiple sets of springs 31 are arranged on the inner wall of the conveyor frame 1; each set of springs 31 is arranged on both sides of the conveyor belt 10; a sponge plate 32 is fixedly connected to the end of each set of springs 31; multiple sets of airbags 33 are installed on the inner wall of the conveyor frame 1; the airbags 33 are arranged outside the sponge plate 32; an air inlet valve 34 is fixedly connected to the middle of the airbag 33; during operation, air is inflated into the airbag 33 through the end of the air inlet valve 34. When the product is conveyed through the conveyor belt 10, the product comes into contact with the surface of the airbag 33, and the softness of the airbag 33 cushions the product. At the same time, when the product impacts the airbag 33, the sponge plate 32 and the springs 31 absorb the impact force of the product on the airbag 33. Through the above structure, the airbag 33 has a certain elasticity and buffering capacity, which can absorb the impact force of the product on both sides of the conveyor belt 10 during the conveying process, reduce the damage to the product caused by collision, absorb and disperse the impact force, so that the product is conveyed to the next stage more smoothly, reduce the resistance and friction during the conveying process, and thus improve the conveying speed.

[0027] like Figures 1 to 5As shown, a water storage tank 4 is fixedly connected to the side wall of the conveyor frame 1; the water storage tank 4 is fixedly connected to one end near the support 11; an inlet pipe 41 is fixedly connected to the top of the water storage tank 4; a drain pipe 42 is fixedly connected to the middle of the water storage tank 4; the end of the drain pipe 42 is fixedly connected to the middle of the conveyor frame 1; multiple spray nozzles 43 are fixedly connected to the middle of the drain pipe 42; the multiple spray nozzles 43 are equidistantly distributed; a fixing plate 44 is fixedly connected to the end of the conveyor frame 1; a scraper 45 is fixedly connected to the top of the fixing plate 44; the scraper 45 is in contact with the surface of the conveyor belt 10; during operation, pure water is placed inside the water storage tank 4 through the inlet pipe 41 for storage. The water storage tank 4 is equipped with a water pump. When the water pump is turned on, the stored water... Water inside the box 4 is drained to the middle of the drain pipe 42, and then through multiple spray nozzles 43 to form water mist which is discharged onto the surfaces of multiple conveyor belts 10. During the movement of the conveyor belts 10, the water stains and dirt on the surface of the conveyor belts 10 are scraped off by the scraper 45. The product continuously cleans the conveyor belts 10 during the conveying process. Through the above structure, multiple spray nozzles 43 can spray an appropriate amount of water mist onto the corresponding surface of the conveyor belts 10. The scraper 45 is close to the bottom of the conveyor belts 10 to effectively scrape off the residual materials or dirt on the surface of the conveyor belts 10, keeping the conveyor belts 10 clean and reducing the blockage or damage caused by the accumulation of materials on the surface of the conveyor belts 10.

[0028] like Figure 2 and Figure 4 As shown, a heating chamber 5 is fixedly connected to the side wall of the support 11; multiple through holes 51 are opened in the middle of the heating chamber 5; a fan 52 is installed on the inner side wall of the heating chamber 5; a heating rod 53 is installed on the inner side wall of the heating chamber 5; an exhaust pipe 54 is fixedly connected to the middle of the heating chamber 5; the exhaust pipe 54 is fixedly connected to one side of the heating rod 53; an exhaust groove 55 is opened in the middle of the exhaust pipe 54; during operation, when cleaning the conveyor belt 10, the fan 52 and the heating rod 53 are turned on, and the external airflow enters the interior of the heating chamber 5 through the through holes 51. The heat on the surface of the heating rod 53 causes the airflow to heat up, and it is discharged from the middle of the exhaust groove 55 through the exhaust pipe 54. The hot airflow blows onto the surface of the conveyor belt 10, thereby drying the moisture on the surface of the conveyor belt 10. The above structure can effectively remove the residual moisture after cleaning, reduce the corrosion problem caused by moisture on the surface of the conveyor belt 10, and reduce the contamination of the products transported subsequently by the residual moisture.

[0029] like Figure 5 As shown, the top of the fixing plate 44 is provided with an installation groove 6; a collection box 61 is installed in the middle of the installation groove 6; during operation, the collection box 61 is slid into the installation groove 6, so that the collection box 61 is fixed in the middle of the fixing plate 44. After the scraper 45 scrapes away the water and dirt on the surface of the conveyor belt 10, the water and dirt that have fallen and been scraped away are collected together by the collection box 61. Through the above structure, as the conveyor belt 10 moves continuously, the debris adhering to the bottom of the conveyor belt 10 will be continuously scraped into the collection box 61, effectively reducing the amount of debris and water mist scattered in the working area, and reducing the workload of cleaning and maintenance of the working area.

[0030] like Figure 2 As shown, an elastic pad 7 is installed in the middle of the dial plate 23; the elastic pad 7 is fixed to the outer wall of the dial plate 23; when the product is moved during operation, the elastic pad 7 comes into direct contact with the product through its softness. The above structure can absorb and disperse the impact force generated between the dial plate 23 and the product during operation, thereby reducing the damage to the product during the moving process.

[0031] During operation, the product is placed into the feeding hopper 17, and guided by the guide plate 18, it slides towards the discharge port 19. The product is separated by the equalizing component 2, and the first motor 13 is activated simultaneously. The output of the first motor 13 drives the adjusting screw 14 to rotate in the middle of the moving groove 12. During the rotation of the moving groove 12, the nut 15 moves inside the adjusting screw 14, which in turn drives the slider 16 to slide in the middle of the bracket 11. The slider 16 moves the feeding hopper 17 to one side, and the product is discharged from the discharge port 19 into the corresponding conveyor belt 10 for transport. After the feeding hopper 17 moves to one side, the output of the first motor 13 drives the adjusting screw 14 in the opposite direction, causing the feeding hopper 17 to pass through the nut 15. The feeding bin 17 moves back and forth to the other side, allowing products to enter the conveyor belt 10 sequentially for transport. The evenly distributed product is ensured by the leveling component 2. As the product moves through the middle of the conveyor belt 10, the buffer component 3 provides cushioning protection. When the product continues to enter the feeding bin 17 and exits through the discharge port 19, the second motor 21 starts. The output of the second motor 21 drives the rotating shaft 22 to rotate, which in turn drives multiple guide plates 23 to rotate. The guide plates 23 move the product, controlling the rotation speed of the second motor 21's output. When the discharge port 19 moves to the corresponding position on the conveyor belt 10, the guide plates 23 rotate, pushing the product onto the conveyor belt 10, thus ensuring the product is evenly distributed. In the middle of the conveyor belt 10, air is inflated into the airbag 33 through the end of the air inlet valve 34. When the product is conveyed through the conveyor belt 10, it contacts the surface of the airbag 33. The softness of the airbag 33 cushions the product. Simultaneously, when the product impacts the airbag 33, the sponge plate 32 and spring 31 absorb the impact force. Pure water is stored in the water storage tank 4 through the water inlet pipe 41. The water storage tank 4 is equipped with a water pump. When the pump is turned on, the water in the water storage tank 4 is discharged to the middle of the drain pipe 42, and then through multiple spray nozzles 43 to form a water mist that is discharged onto the surfaces of multiple conveyor belts 10. During the movement of the conveyor belt 10, the scraper 45 removes water stains and dirt from the surface of the conveyor belt 10. During the conveying process, the conveyor belt 10 is continuously cleaned. During the cleaning process, the fan 52 and heating rod 53 are turned on, and the external airflow enters the heating chamber 5 through the through hole 51. The heat on the surface of the heating rod 53 heats the airflow, which is then discharged from the middle of the exhaust duct 55 through the exhaust pipe 54. The hot airflow blows onto the surface of the conveyor belt 10, thereby drying the moisture on the surface of the conveyor belt 10. The collection box 61 is slid into the mounting groove 6 and fixed in the middle of the fixing plate 44. After the scraper 45 scrapes away the moisture and dirt on the surface of the conveyor belt 10, the collected box 61 collects the fallen and scraped moisture and dirt. When the product is moved, the elastic pad 7 comes into direct contact with the product.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A conveying mechanism for automatically and uniformly sorting products, comprising a conveyor frame (1); characterized in that: The conveyor frame (1) has multiple conveyor belts (10) in the middle; a bracket (11) is fixedly connected to the end of the conveyor frame (1); a moving groove (12) is opened in the middle of the bracket (11); a first motor (13) is installed at the end of the bracket (11); the output end of the first motor (13) passes through the end of the bracket (11); an adjusting screw (14) is fixedly connected to the output end of the first motor (13); the adjusting screw (14) is rotatably connected to the middle of the moving groove (12); the adjusting screw (14) A nut (15) is installed in the middle; a slider (16) is fixedly connected to the middle of the nut (15); the slider (16) is slidably connected in the middle of the moving groove (12); a feeding bin (17) is fixedly connected to the top of the slider (16); a guide plate (18) is fixedly connected to the middle of the feeding bin (17); a discharge port (19) is opened on the side wall of the feeding bin (17); a material leveling component (2) is installed in the middle of the feeding bin (17); a buffer component (3) is provided in the middle of the conveyor frame (1).

2. The conveying mechanism for automatic and uniform sorting of products according to claim 1, characterized in that: The material leveling component (2) includes a second motor (21); the second motor (21) is installed on the side wall of the feeding bin (17); the output end of the second motor (21) passes through the middle of the feeding bin (17); a rotating shaft (22) is fixedly connected to the output end of the second motor (21); one end of the rotating shaft (22) is rotatably connected to the inner side wall of the feeding bin (17); a plurality of baffles (23) are fixedly connected to the middle of the rotating shaft (22); the plurality of baffles (23) are equidistantly distributed; the baffles (23) are located in the middle of the discharge port (19).

3. The conveying mechanism for automatic and uniform sorting of products according to claim 1, characterized in that: The buffer assembly (3) includes multiple sets of springs (31); the multiple sets of springs (31) are arranged on the inner wall of the conveyor frame (1); each set of springs (31) is arranged on both sides of the conveyor belt (10); a sponge plate (32) is fixedly connected to the end of each set of springs (31); multiple sets of airbags (33) are installed on the inner wall of the conveyor frame (1); the airbags (33) are arranged outside the sponge plate (32); an air inlet valve (34) is fixedly connected to the middle of the airbag (33).

4. The conveying mechanism for automatic and uniform sorting of products according to claim 1, characterized in that: A water storage tank (4) is fixed to the side wall of the conveyor frame (1); the water storage tank (4) is fixed to one end near the support (11); an inlet pipe (41) is fixed to the top of the water storage tank (4); a drain pipe (42) is fixed to the middle of the water storage tank (4); the end of the drain pipe (42) is fixed to the middle of the conveyor frame (1); a plurality of spray heads (43) are fixed to the middle of the drain pipe (42); the plurality of spray heads (43) are evenly distributed; a fixing plate (44) is fixed to the end of the conveyor frame (1); a scraper (45) is fixed to the top of the fixing plate (44); the scraper (45) is in contact with the surface of the conveyor belt (10).

5. The conveying mechanism for automatic and uniform sorting of products according to claim 1, characterized in that: A heating chamber (5) is fixedly connected to the side wall of the bracket (11); a plurality of through holes (51) are opened in the middle of the heating chamber (5); a fan (52) is installed on the inner side wall of the heating chamber (5); a heating rod (53) is installed on the inner side wall of the heating chamber (5); an exhaust pipe (54) is fixedly connected to the middle of the heating chamber (5); the exhaust pipe (54) is fixedly connected to one side of the heating rod (53); an exhaust groove (55) is opened in the middle of the exhaust pipe (54).

6. The conveying mechanism for automatic and uniform sorting of products according to claim 4, characterized in that: The top of the fixing plate (44) is provided with an installation groove (6); a collection box (61) is installed in the middle of the installation groove (6).

7. The conveying mechanism for automatic and uniform sorting of products according to claim 2, characterized in that: An elastic pad (7) is installed in the middle of the dial plate (23); the elastic pad (7) is fixed to the outer wall of the dial plate (23).

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