Air blast drying box for pretreatment before inspection of cosmetic bottles

Abstract

The invention relates to the technical field of drying boxes, in particular to an air blast drying box for pretreatment before inspection of cosmetic bottles, which comprises a drying box body, a first rectangular box fixed on a side arm of the drying box body, a centrifugal fan, a heating pipe, an air inlet hole and an air outlet hole. A rectangular box II is arranged at the bottom in the main body, an air outlet hole is also formed in the edge of the main body and communicated with the rectangular box I, a rectangular frame is arranged in the main body, an air outlet pipe is rotationally connected to the rectangular frame, a butt joint hole is formed in the rectangular box II, the rectangular box II is plugged by a plugging piece initially, the air outlet pipe supports an object in parallel, and after the air outlet pipe deflects by 90 degrees, the plugging piece plugs the air outlet hole and opens the butt joint hole, and the air outlet pipe is vertical; according to the device, the two rectangular boxes are matched, hot air circulates from the edge to the center, the temperature is uniform, and the drying efficiency is high; and through the design of a rotatable air outlet pipe and the like, the interior and exterior of the cosmetic bottle are comprehensively and efficiently dried conveniently, drying time is shortened, and detection efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of drying oven technology, specifically a forced-air drying oven for pretreatment of cosmetic bottles before inspection. Background Technology

[0002] The forced-air drying oven used for pre-treatment of cosmetic bottles before inspection is a precision device designed specifically for laboratories. It relies on a forced hot air circulation system to achieve efficient and uniform drying. Its core components include a stainless steel inner liner, an intelligent temperature control system, and a centrifugal fan. During operation, electric heating elements heat the air, which is then driven by the fan to form a closed-loop airflow. During pre-treatment, cosmetic bottles must be laid flat on shelves with appropriate spacing. Precise temperature control removes moisture from the bottles, while the oven door must be closed to minimize heat loss and prevent deformation of plastic bottles or cracking of glass bottles due to high temperatures. However, due to the significant differences in the height of cosmetic bottles, for taller bottles with deeper internal cavities, hot air cannot penetrate sufficiently, resulting in longer drying times and reduced testing efficiency. Therefore, we propose a forced-air drying oven for pre-treatment of cosmetic bottles before inspection. Summary of the Invention

[0003] To solve the above-mentioned technical problems, this application provides a forced-air drying oven for pretreatment of cosmetic bottles before inspection, including a drying oven body. A rectangular box is fixedly connected to the side arm of the drying oven body. A centrifugal fan and a heating tube are installed inside the rectangular box. An air inlet is opened on the rectangular box, and an air outlet is opened on the edge of the rectangular box. The drying oven body also includes a rectangular box two disposed at the bottom inside the drying oven body. The rectangular box two is electrically connected to the rectangular box one, and an air outlet is also opened on the inner edge of the rectangular box two. A rectangular frame is provided inside the drying oven body. An air outlet pipe is rotatably connected to the frame, and a docking hole is opened on the rectangular box 2. A sealing component is installed inside the main body of the drying box. In the initial state of the device, the docking hole is blocked by the sealing component, and the air outlet pipe is parallel to the top of the rectangular box 2 to support the items to be dried. When the air outlet pipe is deflected by 90 degrees, the sealing component plays its role, blocking the air outlet on the rectangular box 2 on the one hand and opening the docking hole on the other. Subsequently, the bottom of the air outlet pipe is connected to the docking hole, and the air outlet pipe is perpendicular to the rectangular box 2. At this time, cosmetic bottles can be inserted upside down into the air outlet pipe to dry their interiors.

[0004] In some embodiments, the air outlet pipe is provided in two rows, and the two rows of air outlet pipes are staggered on both sides of the rectangular frame. The sealing component includes a strip plate 1 that is slidably disposed in the rectangular box 2. The strip plate 1 is provided with a plurality of round holes evenly distributed on it. The strip plate 1 is moved so that the round holes are aligned with the docking holes. A strip plate 2 is slidably connected inside the rectangular box 2. The strip plate 2 has rectangular grooves that are evenly opened on it and communicate with the air outlet. A connecting plate is fixedly connected between the strip plate 1 and the strip plate 2. When the strip plate 1 is moved, the strip plate 2 is moved to offset the rectangular grooves and the air outlet. Furthermore, a shaft is rotatably connected to the rectangular box 2, and a transmission component is provided between the shaft 1 and the connecting plate for moving the connecting plate when the shaft 1 is rotated. Two shafts 2 are rotatably connected to the rectangular frame, and the two shafts 2 are fixedly connected to two exhaust ducts respectively. A linkage component is provided between the shaft 2 and the shaft 1 for rotating the shaft 1 when the exhaust duct is deflected.

[0005] In some embodiments, the transmission component includes a hollow cylinder fixedly connected to one end of a shaft, a ring slidably connected to the hollow cylinder, a push plate fixedly connected between the ring and a connecting plate, and a spiral groove formed on the hollow cylinder. A sliding column with one end located in the spiral groove is fixedly connected to the ring, and the sliding column is slidably connected to the inner wall of the spiral groove.

[0006] In some embodiments, a toothed disc is fixedly connected to each of the two hollow cylinders, and an L-shaped plate is slidably connected to the rectangular box. A rack is fixedly connected to both ends of the L-shaped plate, and the two racks mesh with the two toothed discs respectively.

[0007] In some embodiments, the linkage includes a rocker arm fixedly connected to one end of the second shaft, a hollow shaft three rotatably connected to the rectangular frame, the hollow shaft three being connected to the first shaft, and a rocker arm also fixedly connected to the hollow shaft three, with one end of the two rocker arms rotatably connected by a connecting rod.

[0008] In some embodiments, the first shaft slides through the third hollow shaft, and a sliding protrusion is fixedly connected inside the third hollow shaft. A sliding groove is provided on the first shaft, and one end of the sliding protrusion is located inside the sliding groove, which is used to guide and limit the sliding of the rectangular frame relative to the first shaft.

[0009] In some embodiments, a sliding tube is slidably connected to one end of the air outlet pipe, and an annular body with an isosceles trapezoidal cross-section is fixedly connected inside the air outlet pipe, and a sliding rod is fixedly connected inside the air outlet pipe. A sliding cylinder is slidably connected to the sliding rod, and the end of the sliding cylinder facing the annular body is designed with a bevel. A spring is provided at one end of the inclined surface of the sliding cylinder, and one end of the spring is fixed to the air outlet pipe. A spring is provided at the other end of the sliding cylinder, and one end of the spring is fixed to one end of the sliding pipe. Both the spring and the spring are sleeved on the slide rod, and the elastic coefficient of the spring is designed to be greater than that of the spring. A top rod is fixedly connected to the top of the sliding tube.

[0010] In some embodiments, a support plate is fixedly connected to the middle of the rectangular frame to support and limit the sliding tube; A strip-shaped rubber block is fixedly connected to the rectangular box 2, and each strip-shaped rubber block has a ventilation hole that communicates with the docking hole. After the air outlet pipe deflects, its end contacts and abuts against the strip-shaped rubber block, which is used to temporarily limit and fix the air outlet pipe.

[0011] This invention has at least the following beneficial effects: This device uses rectangular boxes one and two to heat the air with heating tubes and a centrifugal fan to circulate the hot air from the edge to the center, enhancing the circulation effect of the hot air within the drying chamber and ensuring uniform temperature, thus improving drying efficiency. The rotatable air outlet on the rectangular frame and the docking holes and sealing parts on rectangular box two can initially support items, and when deflected, they can block the air outlet and open the docking holes, making the air outlet vertical. This allows tall cosmetic bottles to be inserted upside down for internal drying, enabling hot air to penetrate directly and fully into the interior, shortening the drying time for these bottles and improving testing efficiency. It makes full use of space and achieves comprehensive and efficient drying of the inside and outside of cosmetic bottles. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 Schematic diagram of partial cross-section; Figure 3 For the present invention Figure 2 Another structural diagram; Figure 4 For the present invention Figure 3 Schematic diagram of partial cross-section; Figure 5 For the present invention Figure 4 Another structural diagram; Figure 6 For the present invention Figure 5 Schematic diagram of partial cross-section; Figure 7 For the present invention Figure 6 Schematic diagram of partial cross-section; Figure 8 For the present invention Figure 7 Schematic diagram of the structure of area A in the middle; Figure 9 For the present invention Figure 7 Schematic diagram of partial cross-section; Figure 10 For the present invention Figure 9 Schematic diagram of partial cross-section; Figure 11 For the present invention Figure 10 Schematic diagram of partial cross-section; Figure 12 This is a schematic diagram of the air outlet duct structure of the present invention.

[0013] In the diagram: 1-Drying oven body; 11-Rectangular box one; 12-Centrifugal fan; 13-Heating tube; 14-Air inlet; 15-Air outlet; 2-Rectangular box two; 3-Rectangular frame; 4-Air outlet pipe; 5-Connecting hole; 6-Sealing component; 16-Strip plate one; 17-Round hole; 18-Strip plate two; 19-Rectangular groove; 21-Connecting plate; 22-Shaft one; 23-Transmission component; 24-Shaft two; 25-Linkage component; 26-Empty 27-Cylinder; 28-Ring; 29-Push plate; 30-Helical groove; 31-Sliding column; 32-Gear disc; 33-L-shaped plate; 34-Rack; 35-Rocker rod; 36-Hollow shaft three; 38-Sliding convexity; 39-Sliding groove; 41-Sliding tube; 42-Ring body; 43-Sliding rod; 44-Sliding cylinder; 45-Spring one; 46-Spring two; 47-Push rod; 48-Support plate; 49-Strip rubber block; 51-Ventilation hole. Detailed Implementation

[0014] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0015] Please see Figure 1-4 The present invention provides a technical solution: a blower drying oven for pretreatment of cosmetic bottles before inspection, comprising a drying oven body 1, a rectangular box 11 fixedly connected to the side arm of the drying oven body 1, a centrifugal fan 12 and a heating tube 13 disposed inside the rectangular box 11, the centrifugal fan 12 and the heating tube 13 being mounted on the drying oven body 1, and an air inlet 14 being opened on the rectangular box 11, and an air outlet 15 being opened on the edge of the rectangular box 11; it also includes a rectangular box 2 fixedly connected to the bottom of the inner cavity of the drying oven body 1, and the rectangular box 2 is electrically connected to the rectangular box 11, and an air outlet 15 is also opened on the inner edge of the rectangular box 2; Specifically, when the device is working normally, the air is heated by the heating tube 13 inside the rectangular box 11, and then the air enters the rectangular box 11 through the air inlet 14 by the rotation of the centrifugal fan 12, and then dissipates through the air outlet 15 on the edge of the rectangular box 11 and the rectangular box 2, thereby forming a circulation of hot air flowing from the edge to the center inside the drying chamber body 1, which effectively enhances the hot air circulation effect.

[0016] A rectangular frame 3 is slidably connected inside the drying chamber body 1. An air outlet pipe 4 is rotatably connected to the rectangular frame 3. A docking hole 5 is opened on the rectangular box 2, which is conductively connected to the rectangular box 2. A sealing component 6 is provided inside the drying chamber body 1. In the initial state of the device, the docking hole 5 is blocked by the sealing component 6, and the air outlet pipe 4 is parallel to the top of the rectangular box 2 to support the items to be dried. When the air outlet pipe 4 is deflected by 90 degrees, the sealing component 6 plays its role, blocking the air outlet 15 on the rectangular box 2 on one hand and opening the docking hole 5 on the other. Subsequently, the bottom of the air outlet pipe 4 is connected to the docking hole 5, and the air outlet pipe 4 is perpendicular to the rectangular box 2. At this time, cosmetic bottles can be inserted upside down into the air outlet pipe 4 to dry their interior. In summary, this device, through the cooperation of rectangular box 11 and rectangular box 2, uses heating tube 13 to heat the air and centrifugal fan 12 to drive the hot air to circulate from the edge to the center, enhancing the circulation effect of hot air within the drying chamber body 1, ensuring uniform temperature inside the chamber, and improving drying efficiency. The rotatable air outlet 4 on the rectangular frame 3, along with the docking hole 5 and sealing piece 6 on rectangular box 2, can initially support items. After deflection, it can block the air outlet 15 and open the docking hole 5, making the air outlet 4 vertical. This facilitates the inverted drying of tall cosmetic bottles, allowing hot air to penetrate directly and fully into the interior, shortening the drying time required for such bottles, thereby improving testing efficiency. It makes full use of space and achieves comprehensive and efficient drying treatment of the inside and outside of cosmetic bottles.

[0017] The air outlet duct 4 is provided in two rows, and the two rows of air outlet duct 4 are staggered on both sides of the rectangular frame 3 to enhance the support effect. The sealing component 6 includes a strip plate 16 that is slidably set in the rectangular box 2. Multiple round holes 17 are evenly opened on the strip plate 16. The strip plate 16 is moved so that the round holes 17 are aligned with the docking hole 5. A strip plate 18 is slidably connected inside the rectangular box 2. The strip plate 18 has evenly spaced rectangular grooves 19 that communicate with the air outlet 15. A connecting plate 21 is fixedly connected between the strip plate 16 and the strip plate 18. Moving the strip plate 16 moves the strip plate 18, thus misaligning the rectangular grooves 19 with the air outlet 15. In the initial working state of the device, the air outlet duct 4 is parallel to the rectangular box 2, and the circular hole 17 on the strip plate 16 is misaligned with the docking hole 5, thereby sealing the docking hole 5 and preventing hot air from flowing directly out of the docking hole 5, causing a short circuit in the hot air circulation. Simultaneously, the rectangular grooves 19 on the strip plate 18 and the rectangular grooves 19 communicate with the air outlet 15. The air outlet 15 on rectangular box 2 is aligned, allowing hot air to flow out from the air outlet 15 and circulate normally. Then, during the process of deflecting the air outlet pipe 4 by ninety degrees, the strip plate 16 and strip plate 2 18 are moved simultaneously, so that the round hole 17 on strip plate 16 is aligned with the docking hole 5, so that the air outlet pipe is connected to rectangular box 2 through the docking hole 5. Meanwhile, the rectangular groove 19 on strip plate 2 18 is offset from the air outlet 15 on rectangular box 2, thus blocking it. Then, the hot air from rectangular box 2 will directly pass through the air outlet pipe 4 first through the inside of the cosmetic bottle, and then flow out from the mouth of the cosmetic bottle to help dry the outside of the cosmetic bottle. Furthermore, a shaft 22 is rotatably connected to the rectangular box 2. A transmission component 23 is provided between the shaft 22 and the connecting plate 21, which is used to drive the connecting plate 21 to move when the shaft 22 is rotated. Two shafts 24 are rotatably connected to the rectangular frame 3. The two shafts 24 are fixedly connected to the two exhaust ducts 4 respectively. A linkage component 25 is provided between the shaft 24 and the shaft 22, which is used to drive the shaft 22 to rotate when the exhaust duct 4 is deflected.

[0018] The transmission component 23 includes a hollow cylinder 26 fixedly connected to one end of the shaft 22, a ring 27 slidably connected to the hollow cylinder 26, a push plate 28 fixedly connected between the ring 27 and the connecting plate 21, and a spiral groove 29 is provided on the hollow cylinder 26. A sliding post 31 with one end located in the spiral groove 29 is fixedly connected to the ring 27, and the sliding post 31 is slidably connected to the inner wall of the spiral groove 29. Specifically, the hollow cylinder 26 is rotated by the rotating shaft 22, which in turn pushes the sliding column 31 to move through the spiral groove 29, thereby driving the ring 27 and the push plate 28 to move, which in turn drives the strip plate 16 and the strip plate 28, which are fixedly connected to the connecting plate 21, to slide.

[0019] Two hollow cylinders 26 are fixedly connected to toothed discs 32, and an L-shaped plate 33 is slidably connected to the rectangular box 2. Both ends of the L-shaped plate 33 are fixedly connected to racks 34. The two racks 34 mesh with the two toothed discs 32. Through the cooperation between the racks 34 and the toothed discs 32, the two hollow cylinders 26 can rotate synchronously, thereby enabling the two exhaust pipes 4 to deflect synchronously, improving the stability of the device during operation.

[0020] The linkage 25 includes a rocker arm 35 fixedly connected to one end of shaft 24. The rocker arm 35 is slidably connected to the inner wall of the rectangular frame 3. A hollow shaft 36 is rotatably connected to the rectangular frame 3. The hollow shaft 36 is connected to shaft 22, and a rocker arm 35 is also fixedly connected to the hollow shaft 36. One end of the two rocker arms 35 is rotatably connected through a connecting rod 37. The connecting rod 37 is slidably connected to the inner wall of the rectangular frame 3. By deflecting the air outlet duct 4, shaft 24 is rotated, which in turn pushes the connecting rod 37 to move through the rocker arm 35, thereby driving the hollow shaft 36 fixedly connected to the rocker arm 35 to rotate, which in turn drives shaft 22 to rotate.

[0021] Shaft 22 slides through hollow shaft 36, and a sliding protrusion 38 is fixedly connected inside hollow shaft 36. A sliding groove 39 is provided on shaft 22, and one end of the sliding protrusion 38 is located in the sliding groove 39, which is used to guide and limit the sliding of rectangular frame 3 relative to rectangular box 2. A support plate 48 is fixedly connected to the middle of the rectangular frame 3 to support and limit the sliding tube 41; A strip rubber block 49 is fixedly connected to the rectangular box 2, and each strip rubber block 49 is provided with a ventilation hole 51 that communicates with the docking hole 5. After the air outlet pipe 4 deflects, its end contacts and abuts against the strip rubber block 49 to temporarily limit and fix the air outlet pipe 4. Specifically, in the initial state of the device, the air outlet pipe 4 is parallel to the top of the rectangular box 2, and the sliding pipe 41 on the air outlet pipe 4 is in contact with the support plate 48. The support plate 48 supports and limits the sliding pipe 41. Then, when it is necessary to dry relatively tall cosmetic bottles, the operator can first pull the rectangular frame 3 out of the drying chamber body 1, then deflect the air outlet pipe 4 by 90 degrees, and then push the rectangular frame 3 back to one end, so that the bottom of one air outlet pipe 4 contacts and abuts the strip rubber block 49, thereby temporarily limiting the air outlet pipe 4 and preventing it from shaking. Then, the operator can easily put the cosmetic bottle on the air outlet pipe 4, and then push the rectangular frame 3 back into the drying chamber body 1. When the rectangular frame 3 is pushed into place, the bottom ends of multiple air outlet pipes 4 are aligned and connected with the ventilation holes 51 on the strip rubber block 49.

[0022] Multiple hollow support plates 48 are evenly fixedly connected to the inner arm of the drying oven body 1. Among them, the hollow support plate 48 located at the lowest end contacts and abuts against the bottom end of the rectangular frame 3, and is used to assist in supporting the rectangular frame 3. The hollow support plate 48 is used to support the tray.

[0023] One end of the air outlet pipe 4 is slidably connected to a sliding tube 41. This design allows the overall length of the air outlet pipe 4 to be flexibly adjusted according to the depth of the cosmetic bottle. Different brands and types of cosmetic bottles vary greatly in height and depth. By extending and retracting the sliding tube 41, it can be ensured that the air outlet pipe 4 can reach deep into the interior of cosmetic bottles of various sizes, thereby achieving effective drying of cosmetic bottles of different specifications and improving the versatility and applicability of the equipment. Furthermore, an annular body 42 with an isosceles trapezoidal cross-section is fixedly connected inside the air outlet duct 4, and a sliding rod 43 is fixedly connected inside the air outlet duct 4. A sliding cylinder 44 is slidably connected to the sliding rod 43. The end of the sliding cylinder 44 facing the annular body 42 is designed with an inclined surface, and a spring 45 is provided at one end of the inclined surface of the sliding cylinder 44. One end of the spring 45 is fixed to the air outlet duct 4, and a spring 46 is provided at the other end of the sliding cylinder 44. One end of the spring 46 is fixed to one end of the sliding tube 41. Both the spring 45 and the spring 46 are sleeved on the sliding rod 43, and the elastic coefficient of the spring 45 is designed to be greater than that of the spring 46. Specifically, an isosceles trapezoidal annular body 42 is fixedly connected inside the air outlet duct 4, which cooperates with a sliding cylinder 44 with an inclined surface design. When the sliding cylinder 44 slides on the slide rod 43, the distance between its inclined surface and the annular body 42 changes. Since the elastic coefficient of spring 1 45 is greater than that of spring 2 46, under normal conditions, the elastic force of spring 1 45 keeps the sliding cylinder 44 in a state where it is far from the relative position of the annular body 42. At this time, the air outlet channel is relatively wide and the air volume is large, which is suitable for tall cosmetic bottles. When an external force, such as the weight of the cosmetic bottle itself, pushes the sliding tube 41, the sliding tube 41 compresses spring 2 46, which in turn drives the sliding cylinder 44 to overcome the elastic force of spring 1 45 and move closer to the annular body 42. The air outlet channel gradually narrows and the air volume decreases. This design can precisely control the airflow according to the actual situation of the cosmetic bottles, avoiding excessive airflow that would waste energy or insufficient airflow that would result in poor drying effect. Furthermore, when drying cosmetic bottles of different heights in the same batch at the same time, it can automatically distribute the hot air volume to improve drying efficiency.

[0024] Furthermore, a top rod 47 is fixedly connected to the top of the sliding tube 41 to prevent the cosmetic bottle from directly contacting the air outlet of the sliding tube 41.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0026] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A drying oven for pretreatment of cosmetic bottles before inspection, comprising a drying oven body (1), wherein a rectangular box (11) is fixedly connected to the side arm of the drying oven body (1), a centrifugal fan (12) and a heating tube (13) are provided inside the rectangular box (11), and an air inlet (14) is provided on the rectangular box (11), and an air outlet (15) is provided on the edge of the rectangular box (11), characterized in that, It also includes: Rectangular box two (2) is set at the bottom of the drying oven body (1) and is connected to rectangular box one (11). The inner edge of rectangular box two (2) is also provided with an air outlet (15). A rectangular frame (3) is set inside the main body (1) of the drying oven, and an air outlet pipe (4) is rotatably connected to the rectangular frame (3). The docking hole (5) is opened on the rectangular box two (2), and the drying box body (1) is provided with a sealing member (6). In the initial state of the device, the docking hole (5) is blocked by the sealing member (6), and the air outlet pipe (4) is parallel to the top of the rectangular box two (2) to support the items to be dried. When the air outlet pipe (4) is deflected by ninety degrees, the sealing member (6) plays a role, blocking the air outlet hole (15) on the rectangular box two (2) on one hand, and opening the docking hole (5) on the other hand. Subsequently, the bottom of the air outlet pipe (4) is connected to the docking hole (5), and the air outlet pipe (4) is perpendicular to the rectangular box two (2). At this time, the cosmetic bottle can be inserted upside down on the air outlet pipe (4) to dry its interior.

2. The forced-air drying oven for pretreatment of cosmetic bottles before inspection according to claim 1, characterized in that: The air outlet pipe (4) is provided in two rows, and the two rows of air outlet pipes (4) are staggered on both sides of the rectangular frame (3). The sealing component (6) includes a strip plate (16) that is slidably disposed in the rectangular box (2). Multiple round holes (17) are evenly opened on the strip plate (16). The strip plate (16) is moved so that the round holes (17) are aligned with the docking holes (5). A strip plate two (18) is slidably connected inside the rectangular box two (2). The strip plate two (18) is evenly provided with rectangular grooves (19) that communicate with the air outlet (15). A connecting plate (21) is fixedly connected between the strip plate one (16) and the strip plate two (18). When the strip plate one (16) is moved, the strip plate two (18) is moved to offset the rectangular grooves (19) and the air outlet (15). Furthermore, a shaft 1 (22) is rotatably connected to the rectangular box 2 (2), and a transmission component (23) is provided between the shaft 1 (22) and the connecting plate (21) for moving the connecting plate (21) when the shaft 1 (22) is rotated. Two shafts 2 (24) are rotatably connected to the rectangular frame (3), and the two shafts 2 (24) are fixedly connected to the two exhaust pipes (4) respectively. A linkage component (25) is provided between the shaft 2 (24) and the shaft 1 (22) for rotating the shaft 1 (22) when the exhaust pipe (4) is deflected.

3. The forced-air drying oven for pretreatment of cosmetic bottles before inspection according to claim 2, characterized in that: The transmission component (23) includes a hollow cylinder (26) fixedly connected to one end of shaft (22), a ring (27) slidably connected to the hollow cylinder (26), a push plate (28) fixedly connected between the ring (27) and the connecting plate (21), and a spiral groove (29) is provided on the hollow cylinder (26). A sliding column (31) with one end located in the spiral groove (29) is fixedly connected to the ring (27), and the sliding column (31) is slidably connected to the inner wall of the spiral groove (29).

4. The forced-air drying oven for pretreatment of cosmetic bottles before inspection according to claim 3, characterized in that: Two hollow cylinders (26) are fixedly connected with toothed discs (32), and an L-shaped plate (33) is slidably connected to the rectangular box (2). Both ends of the L-shaped plate (33) are fixedly connected with racks (34), and the two racks (34) mesh with the two toothed discs (32).

5. The forced-air drying oven for pretreatment of cosmetic bottles before inspection according to claim 4, characterized in that: The linkage (25) includes a rocker arm (35) fixedly connected to one end of shaft two (24), and a hollow shaft three (36) rotatably connected to the rectangular frame (3). The hollow shaft three (36) is connected to shaft one (22), and a rocker arm (35) is also fixedly connected to the hollow shaft three (36). One end of the two rocker arms (35) is rotatably connected through a connecting rod (37).

6. The forced-air drying oven for pretreatment of cosmetic bottles before inspection according to claim 5, characterized in that: The first shaft (22) slides through the third hollow shaft (36), and a sliding protrusion (38) is fixedly connected inside the third hollow shaft (36). A sliding groove (39) is provided on the first shaft (22), and one end of the sliding protrusion (38) is located inside the sliding groove (39) to guide and limit the sliding of the rectangular frame (3) relative to the first shaft (22).

7. The forced-air drying oven for pretreatment of cosmetic bottles before inspection according to claim 6, characterized in that: One end of the air outlet pipe (4) is slidably connected to a sliding pipe (41), and an annular body (42) with an isosceles trapezoidal cross section is fixedly connected inside the air outlet pipe (4). A sliding rod (43) is fixedly connected inside the air outlet pipe (4), and a sliding cylinder (44) is slidably connected on the sliding rod (43). The end of the sliding cylinder (44) facing the annular body (42) is designed with a bevel. A spring 1 (45) is provided at one end of the inclined surface of the sliding cylinder (44). One end of the spring 1 (45) is fixed to the air outlet pipe (4). A spring 2 (46) is provided at the other end of the sliding cylinder (44). One end of the spring 2 (46) is fixed to one end of the sliding pipe (41). Both the spring 1 (45) and the spring 2 (46) are sleeved on the slide rod (43). The elastic coefficient of the spring 1 (45) is designed to be greater than that of the spring 2 (46). A top rod (47) is fixedly connected to the top of the sliding tube (41).

8. The forced-air drying oven for pretreatment of cosmetic bottles before inspection according to claim 7, characterized in that: A support plate (48) is fixedly connected to the middle of the rectangular frame (3) to support and limit the sliding tube (41). A strip rubber block (49) is fixedly connected to the rectangular box (2), and each strip rubber block (49) has a ventilation hole (51) that communicates with the docking hole (5). After the air outlet pipe (4) deflects, its end contacts and abuts against the strip rubber block (49) to temporarily limit and fix the air outlet pipe (4).

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