A sandblasting device for processing mobile phone case mold

Abstract

The utility model provides a sandblasting device for processing a mobile phone case mold, comprising a sandblasting box, both side walls of the sandblasting box are provided with through cavities, a platform is provided inside the sandblasting box, a storage cavity is provided inside the sandblasting box below the platform, paint liquid is stored inside the storage cavity, a paint inlet and a paint outlet are provided on both sides of the storage cavity, a conveying track is fixedly installed on the top wall of the sandblasting box, a conveying mechanism is provided at the bottom of the conveying track, which is used to move and convey the mobile phone case mold; the conveying mechanism can be turned over to facilitate sandblasting on both sides of the mobile phone case mold. The utility model has a reasonable design, and drives the clamped and fixed mobile phone case mold to enter the interior of the sandblasting box through the conveying track, and utilizes the meshing between the circular gear and the tooth block to drive the mobile phone case mold to turn over, so as to achieve sandblasting on both sides of the mobile phone case mold, thereby improving work efficiency.

Description

Technical Field

[0001] The utility model mainly relates to the technical field of sandblasting devices, and in particular to a sandblasting device for processing a mobile phone shell mold. Background Art

[0002] The process of using the impact of high-speed sand flow to clean and roughen the surface of the substrate. Compressed air is used as the power to form a high-speed jet beam to spray the material at high speed onto the surface of the workpiece to be processed, so that the appearance or shape of the outer surface of the workpiece changes. Due to the impact and cutting action of the abrasive on the workpiece surface, the surface of the workpiece obtains a certain degree of cleanliness and different roughness, and the mechanical properties of the workpiece surface are improved, thereby improving the fatigue resistance of the workpiece, increasing the adhesion between it and the coating, extending the durability of the coating, and also facilitating the leveling and decoration of the coating.

[0003] The inventor discovered the following defects during the operation of the specific embodiment:

[0004] The sandblasting of existing mobile phone case molds is usually done manually with a handheld sandblasting device, which is inefficient, and the fine sand and gravel particles generated during the sandblasting process splash everywhere, affecting the working environment inside the workshop, which is very inconvenient. Patent application number 202120933382.9 discloses a sandblasting device for processing mobile phone case molds, which includes: a box body, one side of the connecting block is fixedly connected to a motor, the output end of the motor is fixedly connected to a second bevel gear, and the upper end of the inner part of the box body is respectively provided with a connecting rod and a screw, the other end of the screw is fixedly connected to one side of the first bevel gear, and the outer peripheral thread of the middle part of the screw is connected to the inner side of the lower end of the slider, and the front and rear ends of the box body are fixedly connected to an exhaust fan, and the bottom of the exhaust fan is fixedly connected to an exhaust port, and the top of the exhaust fan is fixedly connected to one end of the pipe, and the other end of the pipe is fixedly connected to one side of the filter box. In the utility model, the sandblasting efficiency is improved and the influence of fine sand and gravel particles on the working environment is avoided through the motor, the first bevel gear, the second bevel gear, the screw, the exhaust fan, the exhaust port, the pipeline and the filter box. The utility model is very convenient and worthy of promotion.

[0005] During the actual use of the above-mentioned device, the mobile phone case mold is placed on a conveyor belt for transportation, and sandblasting is performed during the transportation process. Only one side of the mobile phone case mold can be sandblasted, and the working efficiency is low. After the sandblasting operation is completed, the mobile phone case mold will continue to be transported through the conveyor belt, which is inconvenient to collect.

[0006] It should be noted that the above contents belong to the technical cognition scope of the inventor. Since the technical contents in this field are vast and too complicated, the above contents of this application do not necessarily constitute prior art. Utility Model Content

[0007] 1. Technical problems to be solved by the utility model:

[0008] The utility model provides a sandblasting device for processing a mobile phone shell mold, which is used to solve the technical problems existing in the above-mentioned background technology.

[0009] 2. Technical solution:

[0010] To achieve the above-mentioned purpose, the technical solution provided by the utility model is: a sandblasting device for processing mobile phone case molds, comprising a sandblasting box, both side walls of the sandblasting box are provided with through cavities, a platform is provided at the lower part of the sandblasting box, a storage cavity is provided inside the sandblasting box below the platform, paint liquid is stored in the storage cavity, a paint inlet and a paint outlet are provided on both sides of the storage cavity, a conveying track is fixedly installed on the top wall of the sandblasting box, a conveying mechanism is provided at the bottom of the conveying track, which is used to move and convey the mobile phone case mold; the conveying mechanism can be flipped to facilitate sandblasting on both sides of the mobile phone case mold; a collecting box is connected to one side of the output end of the platform, a sponge pad is provided inside the collecting box, and the mobile phone case mold shells are stacked on the sponge pad.

[0011] Furthermore, the conveying mechanism includes a conveying groove, which is opened at the bottom of the conveying track. A conveying block is slidably installed on the inner side of the conveying groove. A connecting rod is installed on the bearing at the bottom of the conveying block. The bottom end of the connecting rod is connected to a first bevel gear, and a second bevel gear is meshed on one side of the first bevel gear. One end of the second bevel gear is connected to a limiting plate, and a movable clamping plate is symmetrically provided on one side of the limiting plate. The mobile phone case mold is clamped between the side walls of the two clamping plates.

[0012] Furthermore, a limiting groove is provided on one side of the limiting plate, and one end of the two clamping plates moves horizontally inside the limiting groove. A bidirectional screw is provided on the inner side of the limiting groove, and a motor is installed outside one end of the limiting plate. One end of the bidirectional screw passes through the inside of the limiting plate and is connected to the output end of the motor, and one end of the two clamping plates is bolted to the bidirectional screw.

[0013] Furthermore, a circular gear is connected to the outside of the connecting rod above the first bevel gear, a tooth block is fixedly installed inside the lower end of the conveying track, the circular gear and the tooth block are meshed and connected, and the distribution distance of the tooth block is equal to 1 / 2 the circumference of the circular gear.

[0014] Furthermore, a plurality of fixed blocks are fixedly connected to the top wall of the sandblasting box body, an L-shaped vertical plate is fixedly connected to one side of the fixed block, a cylinder is installed on one side of the L-shaped vertical plate, the end of the cylinder actuator rod is connected to a first paint spray chamber, the first paint spray chamber is connected to the paint storage chamber through a conduit, a plurality of first paint spray heads are evenly distributed on the bottom of the first paint spray chamber, two second paint spray chambers are fixedly connected to one end of the platform, the second paint spray chamber is also connected to the paint storage chamber through a conduit, and a plurality of second paint spray heads are evenly distributed on one side of the second paint spray chamber.

[0015] Furthermore, an electric push rod is fixedly installed on the side of one end of the sandblasting box, and a push plate is connected to the telescopic end of the electric push rod. The bottom surface of the push plate is in contact with the upper surface of the platform, and the two second paint spraying chambers are located on both sides of the push plate.

[0016] Furthermore, both sides of the sponge pad are connected with engaging blocks, both sides of the inner wall of the collection box are provided with engaging grooves, the engaging blocks are engaged in the inner sides of the engaging grooves, both ends of the sponge pad are provided with strip grooves, and the outer side wall of the collection box is hinged with a door panel.

[0017] 3. Beneficial effects:

[0018] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0019] The utility model has a reasonable design. The mobile phone case mold that is clamped and fixed is driven into the interior of the sandblasting box through the conveying track. The mobile phone case mold is driven to turn over by the meshing between the circular gear and the tooth block, so that the mobile phone case mold can be sandblasted on both sides, thereby improving the work efficiency.

[0020] The utility model can clamp and fix the mobile phone case mold on both sides during the movement through the arrangement and coordination of the limit plate, the limit groove, the clamping plate, the bidirectional screw and the motor, so as to facilitate the sandblasting operation thereof. At the same time, with the arrangement of the conveying dark groove, the conveying block, the connecting rod, the first bevel gear, the second bevel gear, the circular gear and the gear block, the clamped mobile phone case mold can be sandblasted on one side and then turned over, so as to facilitate the sandblasting on the other side thereof, thereby improving the working efficiency of the device. The second paint spraying chamber and the second paint spraying head can be used to sandblast the two side surfaces of the mobile phone case mold, so as to achieve a more comprehensive sandblasting effect.

[0021] The utility model can push the mobile phone case mold after the sandblasting operation into the interior of the collection box through the cooperation of the electric push rod, the push plate, the collection box and the sponge pad, and the provision of the sponge pad makes the mobile phone case mold have a certain cushioning property when falling, so as to avoid the paint being knocked off, and at the same time, with the cooperation of the interlocking block, the strip groove, the interlocking groove and the door panel, a certain number of mobile phone case molds stacked up can be taken out collectively, so that the mobile phone case molds after sandblasting can be collected conveniently.

[0022] It should be noted that the structures not introduced in the present invention are not related to the design points and improvement directions of the present invention, and are the same as the prior art or can be implemented by using the prior art, and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 It is a cross-sectional structural schematic diagram of the utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the conveying mechanism of the utility model;

[0026] Figure 4 This is a schematic diagram of the internal structure of the collection box of the utility model;

[0027] Figure 5 This is a schematic diagram of the structure of the sandblasting component of the utility model.

[0028] Reference numerals:

[0029] 1. Sandblasting box; 101. Through cavity; 2. Platform; 3. Conveying track; 301. Conveying dark groove; 4. Collecting box; 401. Sponge pad; 4010. Fitting block; 4011. Strip groove; 402. Fitting groove; 5. Conveying block; 6. Connecting rod; 7. First bevel gear; 8. Second bevel gear; 9. Limiting plate; 901. Limiting groove; 10. Clamping plate; 11. Bidirectional screw; 12. Motor; 13. Circular gear; 14. Gear block; 15. Fixed block; 16. L-shaped vertical plate; 17. Cylinder; 18. First spray chamber; 1801. First spray head; 19. Second spray chamber; 1901. Second spray head; 20. Electric push rod; 21. Push plate; 22. Door panel. DETAILED DESCRIPTION

[0030] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "page", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", "provided with", "provided on" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Example

[0034] Refer to the attached Figure 1-5 A sandblasting device for processing a mobile phone case mold comprises a sandblasting box 1, both side walls of the sandblasting box 1 are provided with through cavities 101, a platform 2 is provided at the lower part of the sandblasting box 1, a storage cavity is provided at the lower part of the platform 2 inside the sandblasting box 1, paint liquid is stored inside the storage cavity, a paint inlet and a paint outlet are provided at both sides of the storage cavity, a conveying track 3 is fixedly installed on the top wall of the sandblasting box 1, a conveying mechanism is provided at the bottom of the conveying track 3, which is used to move and convey the mobile phone case mold; the conveying mechanism can be turned over to facilitate sandblasting on both sides of the mobile phone case mold; a collecting box 4 is connected to one side of the output end of the platform 2, a sponge pad 401 is provided inside the collecting box 4, and the mobile phone case mold shells are stacked on the sponge pad 401.

[0035] In this embodiment, the conveying mechanism includes a conveying groove 301, which is opened at the bottom of the conveying track 3. A conveying block 5 is slidably installed on the inner side of the conveying groove 301. A connecting rod 6 is installed on the bearing at the bottom of the conveying block 5. The bottom end of the connecting rod 6 is connected to a first bevel gear 7, and a second bevel gear 8 is meshed on one side of the first bevel gear 7. A limiting plate 9 is connected to one end of the second bevel gear 8. A movable clamping plate 10 is symmetrically provided on one side of the limiting plate 9. The mobile phone case mold is clamped between the side walls of the two clamping plates 10. A circular gear 13 is connected to the outside of the connecting rod 6 above the first bevel gear 7. A tooth block 14 is fixedly installed inside the lower end of the conveying track 3. The circular gear 13 is meshed with the tooth block 14, and the distribution distance of the tooth block 14 is equal to 1 / 2 of the circumference of the circular gear 13.

[0036] It should be noted that when the circular gear 13 is meshed with the tooth block 14, the rotation of the circular gear 13 can drive the upper end of the connecting rod 6 to rotate at the bottom of the conveying block 5, and the first bevel gear 7 rotates and drives the second bevel gear 8 meshing therewith to rotate. The rotation of the second bevel gear 8 can drive the limit plate 9 to rotate, so that the mobile phone case mold can be turned over with the non-sandblasted side facing upward, which is convenient for sandblasting the other side of the mobile phone case mold and improves work efficiency.

[0037] In this embodiment, a limiting groove 901 is opened on one side of the limiting plate 9, and one end of the two clamping plates 10 moves horizontally inside the limiting groove 901. A bidirectional screw 11 is provided on the inner side of the limiting groove 901. A motor 12 is installed on the outside of one end of the limiting plate 9. One end of the bidirectional screw 11 passes through the inside of the limiting plate 9 and is connected to the output end of the motor 12. One end of the two clamping plates 10 is bolted to the bidirectional screw 11.

[0038] It should be noted that the mobile phone case mold is placed in the middle position of the two clamping plates 10, and the bidirectional screw 11 is driven to rotate by the motor 12. The bidirectional screw 11 drives the two clamping plates 10 to move closer until the two side surfaces of the mobile phone case mold are clamped and fixed. When the two clamping plates 10 move away from each other, the limit on the mobile phone case mold can be released, allowing it to fall onto the platform 2.

[0039] In this embodiment, a plurality of fixed blocks 15 are fixedly connected to the inner top wall of the sandblasting box 1, an L-shaped vertical plate 16 is fixedly connected to one side of the fixed block 15, a cylinder 17 is installed on one side of the L-shaped vertical plate 16, and a first paint spraying chamber 18 is connected to the end of the actuator rod of the cylinder 17. The first paint spraying chamber 18 is connected to the paint storage chamber through a conduit, and a plurality of first paint spraying heads 1801 are evenly distributed at the bottom of the first paint spraying chamber 18. Two second paint spraying chambers 19 are fixedly connected to one end of the platform 2, and the second paint spraying chamber 19 is also connected to the paint storage chamber through a conduit, and a plurality of second paint spraying heads 1901 are evenly distributed on one side of the second paint spraying chamber 19.

[0040] It should be noted that when the mobile phone case mold moves to below the first paint spray chamber 18, the cylinder 17 is used to drive the first paint spray chamber 18 to move downward, and the paint spray port of the first paint spray head 1801 is kept at a certain distance from the mobile phone case mold. Sandblasting of the upper and lower surfaces and both end surfaces of the mobile phone case mold can be achieved through multiple first paint spray heads 1801. After the upper and lower surfaces and both end surfaces of the mobile phone case mold are sandblasted and fall on the platform 2, the second paint spray chamber 19 and the second paint spray head 1901 on both sides are used to sandblast the two side surfaces of the mobile phone case mold to further improve work efficiency.

[0041] In this embodiment, an electric push rod 20 is fixedly installed on the side of one end of the sandblasting box 1, and a push plate 21 is connected to the telescopic end of the electric push rod 20. The bottom surface of the push plate 21 contacts the upper surface of the platform 2, and the two second paint spraying chambers 19 are located on both sides of the push plate 21.

[0042] It should be noted that, by extending the telescopic end of the electric push rod 20 to drive the push plate 21 to move onto the platform 2, the mobile phone case mold resting thereon can be pushed into the interior of the collection box 4 and fall onto the sponge pad 401.

[0043] In this embodiment, both sides of the sponge pad 401 are connected with a mosaic block 4010, and the inner walls of the collection box 4 are correspondingly provided with a mosaic groove 402. The mosaic block 4010 is embedded in the inner side of the mosaic groove 402. Both ends of the sponge pad 401 are provided with a strip groove 4011, and the outer wall of the collection box 4 is hinged with a door panel 22.

[0044] It should be noted that when the number of mobile phone case molds stacked on the sponge pad 401 reaches a certain number, the door panels 22 at both ends of the collection box 4 are opened, the fingers of both hands hold the inside of the strip groove 4011, and the sponge pad 401 is lifted upward, so that the engaging block 4010 moves upward inside the engaging groove 402 until the sponge pad 401 is completely separated from the inside of the collection box 4, thereby completing the collection of the mobile phone case molds.

[0045] Working principle of the utility model: When using the sandblasting device, first install the two ends of the conveying track 3 on the conveying parts of the factory, then power on the device, and use a hose to connect the paint outlet of the paint storage chamber to the first paint spraying chamber 18 and the second paint spraying chamber 19, and then fix the position of the mobile phone case mold to be sandblasted, put the mobile phone case mold in the middle of the two clamping plates 10, drive the bidirectional screw 11 to rotate through the motor 12, and drive the two clamping plates 10 to approach until the two sides of the mobile phone case mold are clamped and fixed, and use the conveying block 5 to move inside the conveying dark groove 301 to make the mobile phone case The mold enters the interior of the sandblasting box 1 through the through cavity 101. When it moves to the bottom of the first paint spraying cavity 18, the cylinder 17 is used to drive the first paint spraying cavity 18 to move downward, and the paint spraying port of the first paint spraying head 1801 is kept at a certain distance from the mobile phone case mold. The upper surface and both end surfaces of the mobile phone case mold can be sandblasted by multiple first paint spraying heads 1801. After the sandblasting is completed, the mobile phone case mold continues to be moved. When the circular gear 13 is meshed with the tooth block 14, the rotation of the circular gear 13 can drive the connecting rod 6 to rotate at the bottom of the conveying block 5, and the first bevel gear 7 rotates and drives the second bevel gear 8 meshed with it to rotate. The rotation of the bevel gear 8 can drive the limit plate 9 to rotate, so that the mobile phone case mold can be turned over so that the non-sandblasted side faces upward, and then continue to move, and use another first spray paint chamber 18 and multiple first spray paint heads 1801 to sandblast the other side of the mobile phone case mold. When the upper and lower surfaces and both end surfaces of the mobile phone case mold are sandblasted, it continues to move and passes through the through cavity 101 on the other side of the sandblasting box 1, and the two clamping plates 10 are moved away to release the clamping of the mobile phone case mold, so that the mobile phone case mold falls on the platform 2. At this time, the second spray paint chamber 19 and the second spray paint head 1901 can be used to spray the mobile phone After sandblasting on both sides of the shell mold, the extension of the telescopic end of the electric push rod 20 can be used to drive the push plate 21 to move onto the platform 2, and the mobile phone shell mold resting on it can be pushed into the interior of the collection box 4 and fall on the sponge pad 401. When the number of mobile phone shell molds stacked on the sponge pad 401 reaches a certain number, open the door panels 22 at both ends of the collection box 4, hold the inside of the strip groove 4011 with both hands, lift the sponge pad 401 upward, and make the engaging block 4010 move upward inside the engaging groove 402 until the sponge pad 401 is completely separated from the interior of the collection box 4, and the collection of the mobile phone shell molds is completed.

[0046] The above-described embodiments only express a certain implementation method of the utility model, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the patent of the utility model shall be based on the attached claims.

Claims

1. A sandblasting device for processing a mobile phone case mold, characterized in that: The invention comprises a sandblasting box (1), wherein both side walls of the sandblasting box (1) are provided with a through cavity (101), a platform (2) is provided inside the sandblasting box (1) and below the platform (2), a storage cavity is provided inside the sandblasting box (1) and below the platform (2), wherein paint liquid is stored inside the storage cavity, and a paint inlet and a paint outlet are provided on both sides of the storage cavity, respectively, a conveying track (3) is fixedly installed on the top wall of the sandblasting box (1), and a conveying mechanism is provided at the bottom of the conveying track (3) for moving and conveying a mobile phone case mold; the conveying mechanism can be turned over so as to realize sandblasting on both sides of the mobile phone case mold; a collecting box (4) is connected to one side of the output end of the platform (2), a sponge pad (401) is provided inside the collecting box (4), and the mobile phone case mold shells are stacked on the sponge pad (401).

2. A sandblasting device for processing a mobile phone case mold according to claim 1, characterized in that: The conveying mechanism comprises a conveying groove (301), the conveying groove (301) is opened at the bottom of the conveying track (3), a conveying block (5) is slidably installed inside the conveying groove (301), a connecting rod (6) is installed on the bearing at the bottom of the conveying block (5), the bottom end of the connecting rod (6) is connected to a first bevel gear (7), one side of the first bevel gear (7) is meshed with a second bevel gear (8), one end of the second bevel gear (8) is connected to a limiting plate (9), one side of the limiting plate (9) is symmetrically provided with a movable clamping plate (10), and the mobile phone case mold is clamped between the side walls of the two clamping plates (10), and the mobile phone case mold is clamped between the side walls of the two clamping plates (10).

3. A sandblasting device for processing a mobile phone case mold according to claim 2, characterized in that: A limiting groove (901) is provided on one side of the limiting plate (9), one end of each of the two clamping plates (10) moves horizontally inside the limiting groove (901), a bidirectional screw (11) is provided inside the limiting groove (901), a motor (12) is externally installed on one end of the limiting plate (9), one end of the bidirectional screw (11) passes through the inside of the limiting plate (9) and is connected to the output end of the motor (12), and one end of each of the two clamping plates (10) is bolted to the bidirectional screw (11).

4. A sandblasting device for processing a mobile phone case mold according to claim 3, characterized in that: The outside of the connecting rod (6) is located above the first bevel gear (7) and is connected to a circular gear (13). A tooth block (14) is fixedly installed inside the lower end of the conveying track (3). The circular gear (13) and the tooth block (14) are meshedly connected. The distribution distance of the tooth block (14) is equal to 1 / 2 of the circumference of the circular gear (13).

5. A sandblasting device for processing a mobile phone case mold according to claim 4, characterized in that: The inner top wall of the sandblasting box (1) is fixedly connected to a plurality of fixed blocks (15), one side of the fixed block (15) is fixedly connected to an L-shaped vertical plate (16), one side of the L-shaped vertical plate (16) is installed with a cylinder (17), the end of the actuator rod of the cylinder (17) is connected to a first paint spraying chamber (18), the first paint spraying chamber (18) is connected to a paint storage chamber through a conduit, and a plurality of first paint spraying heads (1801) are evenly distributed at the bottom of the first paint spraying chamber (18), one end of the platform (2) is fixedly connected to two second paint spraying chambers (19), the second paint spraying chambers (19) are also connected to the paint storage chamber through a conduit, and a plurality of second paint spraying heads (1901) are evenly distributed on one side of the second paint spraying chamber (19).

6. A sandblasting device for processing a mobile phone case mold according to claim 5, characterized in that: An electric push rod (20) is fixedly mounted on the side surface of one end of the sandblasting box (1); a push plate (21) is connected to the telescopic end of the electric push rod (20); the bottom surface of the push plate (21) is in contact with the upper surface of the platform (2); and the two second paint spray chambers (19) are located on both sides of the push plate (21).

7. A sandblasting device for processing a mobile phone case mold according to claim 6, characterized in that: Both sides of the sponge pad (401) are connected to engaging blocks (4010), both sides of the inner wall of the collection box (4) are provided with engaging grooves (402) correspondingly, the engaging blocks (4010) are engaged inside the engaging grooves (402), both ends of the sponge pad (401) are provided with strip grooves (4011), and the outer wall of the collection box (4) is hinged with a door panel (22).

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