Laser marking device for packaging of finished traditional Chinese medicine decoction pieces

Abstract

The invention provides a laser marking device for packaging finished traditional Chinese medicine decoction pieces, which relates to the technical field of laser marking, comprises a support frame, and is characterized in that a plurality of support plates are arranged in the support frame, a conveying structure is arranged on the support plates, a laser marking structure is arranged on one side of each support plate, and a pushing structure is arranged on each laser marking structure; the pushing structure comprises a pushing rod, a rotating frame is rotationally matched in the supporting plate, and a plurality of connecting frames are arranged on the lower side of the rotating frame. According to the device, the conveying structure is installed on the supporting plate, traditional Chinese medicine decoction piece packages can be transported through the conveying structure, supporting is conducted through the supporting plate, accordingly, heavy traditional Chinese medicine decoction piece packages can be transported, traditional Chinese medicine decoction piece glass bottle packages can be transported, the application range of the device is expanded, transferring is achieved through rotation of the rotating frame, and the device is convenient to use. And therefore, the traditional Chinese medicine decoction pieces subjected to laser marking can be packaged and transferred to another conveying belt.

Description

Technical Field

[0001] This invention relates to the field of laser marking technology, specifically to a laser marking device for finished packaging of traditional Chinese medicine decoction pieces. Background Technology

[0002] After processing, traditional Chinese medicine (TCM) decoction pieces need to be laser-marked on their surface for anti-counterfeiting and information marking. The laser, using a high-energy beam, etches the packaging surface, causing it to change color and the marking to become integrated with the material. This provides resistance to friction, solvents, high and low temperatures, and is indelible and cannot be altered. Furthermore, laser marking eliminates the need for ink, completely preventing ink contamination and ensuring the hygiene and safety of the TCM decoction pieces. Currently, most laser marking is applied to fixed, clamped TCM decoction piece packaging. However, because the packaging is not fixed during transportation, the marking position is prone to shifting. The clamping process during marking can also affect the transport of the packaging, leading to packaging accumulation and impacting production efficiency.

[0003] Therefore, the present invention provides a laser marking device for finished packaging of traditional Chinese medicine decoction pieces. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a laser marking device for finished packaging of traditional Chinese medicine (TCM) decoction pieces, thereby solving the problems mentioned in the background art. This invention can transfer laser-marked TCM decoction piece packaging to another conveyor belt, thus preventing mixing and stacking of the TCM decoction piece packaging, facilitating laser marking; it can adjust the angle of the TCM decoction piece packaging to facilitate laser marking and prevent misalignment; and it can maintain constant air pressure during transfer, thus ensuring stability and preventing the TCM decoction piece packaging from falling off during transport.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: a laser marking device for finished packaging of traditional Chinese medicine decoction pieces, comprising a support frame, characterized in that the support frame is equipped with multiple support plates, a conveying structure is mounted on the support plates, a laser marking structure is mounted on one side of the support plates, a pushing structure is mounted on the laser marking structure, the pushing structure includes a push rod, a rotating frame is rotatably fitted inside the support plates, multiple connecting frames are mounted on the lower side of the rotating frame, an mounting frame is mounted on the lower side of the connecting frames, the mounting frame is a telescopic structure, a pneumatic pushing structure is installed inside the mounting frame, and two clamping plates are slidably fitted at the bottom of the mounting frame.

[0006] Furthermore, a motor is fixed on the support frame, the output end of the motor is fixedly connected to the rotating frame, a rotating groove is opened at the bottom of the support frame, the top of the rotating frame is located in the rotating groove, and the conveying structure includes a conveyor belt, with a support plate located in the middle of the conveyor belt.

[0007] Furthermore, a fixed frame is fixed on one side of the support frame, an electric cylinder is fixed on the fixed frame, a pusher is fixed at the output end of the electric cylinder, and the laser marking structure includes a laser head, which is fixedly connected to the pusher.

[0008] Furthermore, the pushing structure also includes a pushing plate, which is fixedly connected to the pushing frame and the pushing rod, and the surface of the pushing rod is provided with friction texture.

[0009] Furthermore, the rotating frame is fixedly connected to the connecting frame, and the pneumatic push structure includes multiple first air passages opened in the rotating frame. An air inlet pipe is fixed on the side of the support frame, and the air inlet pipe is connected to the first air passages.

[0010] Furthermore, the connecting frame is rotatably connected to the mounting frame, and the pneumatic push structure also includes a second air passage opened in the mounting frame. A blocking structure is installed between the second air passage and the first air passage, and the second air passage is connected to the first air passage.

[0011] Furthermore, the blocking structure includes a first blocking block fixed in the first airway and a second blocking block fixed in the second airway, the first blocking block and the second blocking block are in contact, and a sealing ring is installed between the connecting frame and the mounting frame.

[0012] Furthermore, the mounting bracket includes a first frame and a second frame, the first frame and the second frame are slidably connected, the first frame has a first sliding groove, the first sliding groove is connected to the second air passage and the first air passage, the top of the second frame is fixed with a sliding frame, the sliding frame is located in the first sliding groove, and a plurality of first springs are fixed between the sliding frame and the groove wall of the first sliding groove.

[0013] Furthermore, a third block is installed inside the second airway, and multiple second springs are fixed between the third block and the second airway. A straight frame is fixed to the bottom of the third block. The third block has a structure that is thicker at the top and thinner in the middle, and the top of the third block is in contact with the inner wall of the second airway.

[0014] Furthermore, the bottom of the mounting frame is provided with a second sliding groove, the clamping plate is located in the second sliding groove, and a plurality of third springs are fixed between the clamping plate and the groove wall of the second sliding groove. A sliding rod is slidably fitted in the second sliding groove, one end of the sliding rod is fixedly connected to the clamping plate, a connecting channel is provided in the mounting frame, and a communication port is provided between the connecting channel and the second air passage. The other end of the sliding rod is slidably fitted in the connecting channel.

[0015] The beneficial effects of this invention are:

[0016] 1. A conveyor structure is installed on the support plate, which can transport the packaged Chinese herbal medicine pieces. The support plate supports the transport of heavier packages of Chinese herbal medicine pieces, including glass bottle packages, thus expanding the applicability of the device. The rotating frame facilitates transfer, allowing the laser-marked packages of Chinese herbal medicine pieces to be transferred to another conveyor belt. This prevents the packages of Chinese herbal medicine pieces from mixing and from piling up, making it easier to laser mark them.

[0017] 2. Installing a pushing structure on the laser marking structure can drive the mounting frame to rotate, thereby adjusting the angle of the Chinese herbal medicine packaging. This facilitates laser marking of the Chinese herbal medicine and prevents misalignment. Furthermore, during the laser engraving process, the support plate can provide auxiliary support to prevent the Chinese herbal medicine packaging from shaking and affecting the success rate of laser engraving.

[0018] 3. Install a pneumatic push structure inside the mounting frame. The pneumatic push structure can be used to assist in fixing and ensure the stability of the Chinese herbal medicine packaging. It can also maintain a constant air pressure during transportation, thereby ensuring stability during transportation and preventing the Chinese herbal medicine packaging from falling off during transportation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall assembly three-dimensional structure of a laser marking device for finished packaging of traditional Chinese medicine decoction pieces according to the present invention;

[0020] Figure 2 This is a schematic diagram of the overall assembly cross-sectional structure of a laser marking device for finished packaging of traditional Chinese medicine decoction pieces according to the present invention;

[0021] Figure 3 This is a three-dimensional structural diagram of the laser head, mounting frame, and push rod assembly in a laser marking device for finished packaging of traditional Chinese medicine decoction pieces according to the present invention;

[0022] Figure 4 This is a three-dimensional assembly diagram of the connecting frame and mounting frame in a laser marking device for finished packaging of traditional Chinese medicine decoction pieces according to the present invention;

[0023] Figure 5 This is a schematic diagram of the assembly cross-sectional structure of the connecting frame and the mounting frame in a laser marking device for finished packaging of traditional Chinese medicine decoction pieces according to the present invention;

[0024] Figure 6 for Figure 5 A schematic diagram at point A in the middle;

[0025] Figure 7This is a schematic diagram of the assembly structure of the first and second blocking blocks in a laser marking device for finished packaging of traditional Chinese medicine decoction pieces according to the present invention;

[0026] Figure 8 This is a schematic diagram of the assembly structure of the second air channel in a laser marking device for finished packaging of traditional Chinese medicine decoction pieces according to the present invention;

[0027] Figure 9 This is a schematic diagram of the assembly structure of the clamping plate and mounting frame in a laser marking device for finished packaging of traditional Chinese medicine decoction pieces according to the present invention;

[0028] In the diagram: 101, support frame; 102, support plate; 103, motor; 104, rotating frame; 105, rotating groove; 201, fixed frame; 202, electric cylinder; 203, push frame; 204, laser head; 205, push plate; 206, push rod; 301, connecting frame; 302, air inlet pipe; 303, first air passage; 304, second air passage; 305, first blocking block; 306, second blocking block; 307, sealing ring; 308, first sliding groove; 309, sliding frame; 310, first spring; 311, second sliding groove; 312, clamping plate; 313, second spring; 314, mounting frame; 315, first frame body; 316, second frame body; 317, third blocking block; 318, third spring; 401, connecting channel; 402, sliding rod; 403, connecting port. Detailed Implementation

[0029] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0030] Please see Figures 1 to 9 This invention provides a technical solution: a laser marking device for finished packaging of traditional Chinese medicine decoction pieces, comprising a support frame 101, characterized in that the support frame 101 is equipped with a plurality of support plates 102, a conveying structure is mounted on the support plates 102, a laser marking structure is mounted on one side of the support plates 102, a pushing structure is mounted on the laser marking structure, the pushing structure includes a push rod 206, a rotating frame 104 is rotatably fitted inside the support plates 102, a plurality of connecting frames 301 are mounted on the lower side of the rotating frame 104, an mounting frame 314 is mounted on the lower side of the connecting frames 301, the mounting frame 314 is a telescopic structure, a pneumatic pushing structure is installed inside the mounting frame 314, and two clamping plates 312 are slidably fitted at the bottom of the mounting frame 314.

[0031] Specifically, a conveyor belt is installed on the support plate 102 to provide auxiliary support for the objects on the conveyor belt, enabling the device to transport heavier Chinese herbal medicine packages, such as glass bottle packages, thereby expanding the device's applicability. Then, the two clamping plates 312 are moved downward by the pneumatic push structure, and then the two clamping plates 312 move closer to each other under the action of pneumatic pressure, so as to clamp and fix the Chinese herbal medicine package. Then, it is pulled upward to perform laser marking, and the laser marking structure is moved by the electric cylinder 202 to adjust the position of the laser head 204 to ensure that the laser head 204 can perform better marking work. Then, the rotating frame 104 is rotated for transfer, thereby improving the overall working efficiency of the device.

[0032] In this embodiment, a motor 103 is fixed on the support frame 101, and the output end of the motor 103 is fixedly connected to the rotating frame 104. A rotating groove 105 is provided at the bottom of the support frame 101, and the top of the rotating frame 104 is located in the rotating groove 105. The conveying structure includes a conveyor belt, and the support plate 102 is located in the middle of the conveyor belt.

[0033] Specifically, starting the motor 103 will drive the rotating frame 104 to rotate, thereby rotating the clamped Chinese herbal medicine packaging. For heavier Chinese herbal medicine packaging, after clamping, the second frame 316 moves downward, causing the Chinese herbal medicine packaging to move downward. At this time, the support plate 102 provides auxiliary support for the Chinese herbal medicine packaging, ensuring the stability of the Chinese herbal medicine packaging during the laser marking process. This ensures the success rate of laser marking of Chinese herbal medicine packaging, prevents misalignment or blurring of markings, and improves the product qualification rate.

[0034] A fixed frame 201 is fixed on one side of the support frame 101. An electric cylinder 202 is fixed on the fixed frame 201. A push frame 203 is fixed at the output end of the electric cylinder 202. The laser marking structure includes a laser head 204, which is fixedly connected to the push frame 203. The push structure also includes a push plate 205, which is fixedly connected to the push frame 203. The push plate 205 is fixedly connected to the push rod 206, and the surface of the push rod 206 is decorated with friction texture.

[0035] Specifically, a controller and a laser generator are installed on the support frame 101. The controller controls the device to operate intelligently, reducing labor costs. When the position of the laser head 204 needs to be adjusted, the electric cylinder 202 is activated. The electric cylinder 202 then moves the push frame 203, thereby moving the laser head 204 and adjusting its position. Furthermore, as the push frame 203 moves the laser head 204, it also moves the push plate 205 synchronously, causing the push plate 205 to move the push rod 206. This causes the push rod 206 to contact the mounting frame 314. The friction between the push rod 206 and the mounting frame 314 drives the mounting frame 314 to rotate, thereby adjusting the angle of the clamped Chinese herbal medicine packaging. This facilitates laser marking of the Chinese herbal medicine packaging. A vision sensor is installed on the push frame 203 to assist in positioning. After adjustment, the packaging is pressed down, causing the support plate 102 to assist in clamping the Chinese herbal medicine packaging, which can then continue to push the laser head 204, ensuring that the laser head 204 can successfully perform laser marking.

[0036] The rotating frame 104 is fixedly connected to the connecting frame 301. The pneumatic push structure includes a plurality of first air passages 303 opened in the rotating frame 104. An air inlet pipe 302 is fixed on the side of the support frame 101, and the air inlet pipe 302 is connected to the first air passages 303.

[0037] Specifically, when the rotating frame 104 rotates, the first air passage 303 can be blocked and sealed by the support frame 101 to prevent air pressure changes during rotation from affecting the stability of clamping. When the air inlet pipe 302 is connected to the first air passage 303, the air flow can be controlled by the air pump or air suction pump connected to the air inlet pipe 302, thereby adjusting the air pressure changes in the mounting frame 314. This allows for clamping and up-and-down movement of the Chinese herbal medicine packaging, making the device more flexible to use and expanding its application range.

[0038] The connecting frame 301 is rotatably connected to the mounting frame 314. The pneumatic push structure also includes a second air passage 304 opened in the mounting frame 314. A blocking structure is installed between the second air passage 304 and the first air passage 303. The second air passage 304 is connected to the first air passage 303. The blocking structure includes a first blocking block 305 fixed in the first air passage 303 and a second blocking block 306 fixed in the second air passage 304. The first blocking block 305 and the second blocking block 306 are in contact. A sealing ring 307 is installed between the connecting frame 301 and the mounting frame 314.

[0039] Specifically, when the mounting bracket 314 rotates, the second block 306 in the second air passage 304 will rotate synchronously with the rotation of the mounting bracket 314. When the first block 305 and the second block 306 are stacked, normal air intake can be carried out. When the first block 305 and the second block 306 are misaligned, the gas flow in the mounting bracket 314 can be prevented, and the continued intake of air in the mounting bracket 314 can be prevented. Thus, the seal in the mounting bracket 314 can be controlled by controlling the rotation of the mounting bracket 314, thereby ensuring the stability of the device.

[0040] Mounting bracket 314 includes a first frame 315 and a second frame 316. The first frame 315 and the second frame 316 are slidably connected. A first sliding groove 308 is formed in the first frame 315, which communicates with the second air passage 304 and the first air passage 303. A sliding frame 309 is fixed to the top of the second frame 316. The sliding frame 309 is located in the first sliding groove 308. Multiple first springs 310 are fixed between the sliding frame 309 and the groove wall of the first sliding groove 308. A third block 317 is installed in the second air passage 304. Multiple second springs 313 are fixed between the third block 317 and the second air passage 304. A third block is fixed to the bottom of the third block 317. The mounting bracket has a U-shaped frame. The third block 317 has a structure that is thicker at the top and thinner in the middle. The top of the third block 317 is in contact with the inner wall of the second air passage 304. The bottom of the mounting bracket 314 has a second sliding groove 311. The clamping plate 312 is located in the second sliding groove 311. Multiple third springs 318 are fixed between the clamping plate 312 and the groove wall of the second sliding groove 311. A sliding rod 402 is slidably fitted in the second sliding groove 311. One end of the sliding rod 402 is fixedly connected to the clamping plate 312. A connecting channel 401 is opened in the mounting bracket 314. A connecting port 403 is opened between the connecting channel 401 and the second air passage 304. The other end of the sliding rod 402 is slidably fitted in the connecting channel 401.

[0041] Specifically, when the mounting frame 314 is inflated, the air pressure relatively presses downwards against the second frame 316, causing the second frame 316 to move downwards. This allows the clamped Chinese herbal medicine packaging to slide up and down to adjust its position, facilitating laser marking at different locations on the packaging. When the air pressure is higher, the second frame 316 slides to its bottom, and the higher air pressure relatively presses downwards against the third block 317, causing the third block 317 to slide downwards. The third block 317 no longer blocks the second air passage 304, allowing gas to enter and push the sliding rod 402 to slide, thus driving... The two clamping plates 312 are brought close together, thus clamping and fixing the Chinese herbal medicine packaging. After clamping, air is drawn from above, causing the second spring 313 to rebound and drive the third block 317 to block the second air passage 304, thereby ensuring the stability of the clamping. Continuing to draw air will move the clamped Chinese herbal medicine packaging upward. When it moves to the top, if air is drawn again, the greater air pressure will pull out the third block 317, thereby reconnecting the second air passage 304 with the first air passage 303, and thus resetting the two clamping plates 312, thereby realizing the transfer action of the Chinese herbal medicine packaging.

[0042] Workflow: A conveyor belt is installed on the support plate 102 to transport the packaged Chinese herbal medicine pieces. The support plate 102 provides auxiliary support for the objects on the conveyor belt. Starting the motor 103 drives the rotating frame 104 to rotate, thereby rotating the clamped packaged Chinese herbal medicine pieces. When the mounting frame 314 rotates, the second block 306 in the second air passage 304 rotates synchronously with the mounting frame 314. When the first block 305 and the second block 306 overlap, normal air intake is possible. When the first block 305 and the second block 306 are misaligned, gas flow within the mounting frame 314 is prevented, preventing further leakage within the mounting frame 314. As air continues to be introduced, when the mounting frame 314 is inflated, the air pressure relatively presses downwards against the second frame 316, causing the second frame 316 to move downwards. This allows the clamped Chinese herbal medicine packaging to slide up and down to adjust its position, facilitating laser marking at different locations on the packaging. When the air pressure is higher, the second frame 316 slides to its lowest point, and the higher air pressure relatively presses downwards against the third block 317, causing it to slide downwards. The third block 317 no longer blocks the second air passage 304, allowing gas to enter and push the sliding rod 402 to slide. This causes the two clamping plates 312 to move closer together, allowing them to properly hold the Chinese herbal medicine packaging. The herbal medicine package is clamped and fixed. After clamping, air is drawn from above, causing the second spring 313 to rebound and drive the third block 317 to block the second air passage 304, thus ensuring clamping stability. Continuing to draw air will move the clamped herbal medicine package upwards. When it reaches the top, if air is drawn again, the higher air pressure will pull out the third block 317, reconnecting the second air passage 304 with the first air passage 303, thus resetting the two clamping plates 312. When clamping the herbal medicine package, activating the electric cylinder 202 will move the push frame 203, which in turn moves the laser head 204, allowing adjustment of its position. When the pusher 203 moves the laser head 204, the pusher 203 can move the pusher plate 205 synchronously, causing the pusher plate 205 to move the push rod 206, so that the push rod 206 contacts the mounting frame 314. The friction between the push rod 206 and the mounting frame 314 causes the mounting frame 314 to rotate, thereby adjusting the angle of the clamped Chinese herbal medicine packaging, which facilitates laser marking of the Chinese herbal medicine packaging. A vision sensor is installed on the pusher 203 for auxiliary positioning. After the adjustment is completed, the packaging is pressed down, so that the support plate 102 assists in clamping the Chinese herbal medicine packaging, so that the laser head 204 can continue to be pushed, ensuring that the laser head 204 can successfully perform laser marking.

[0043] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A laser marking device for finished packaging of traditional Chinese medicine decoction pieces, comprising a support frame (101), characterized in that, The support frame (101) is equipped with multiple support plates (102), and a conveying structure is installed on the support plate (102). A laser marking structure is installed on one side of the support plate (102), and a pushing structure is installed on the laser marking structure. The pushing structure includes a push rod (206). A rotating frame (104) is rotatably fitted inside the support plate (102). Multiple connecting frames (301) are installed on the lower side of the rotating frame (104). An installation frame (314) is installed on the lower side of the connecting frame (301). The installation frame (314) is a telescopic structure. A pneumatic pushing structure is installed inside the installation frame (314). Two clamping plates (312) are slidably fitted at the bottom of the installation frame (314).

2. The laser marking device for finished packaging of traditional Chinese medicine decoction pieces according to claim 1, characterized in that: A motor (103) is fixed on the support frame (101). The output end of the motor (103) is fixedly connected to the rotating frame (104). A rotating groove (105) is opened at the bottom of the support frame (101). The top of the rotating frame (104) is located in the rotating groove (105). The conveying structure includes a conveyor belt, and a support plate (102) is located in the middle of the conveyor belt.

3. The laser marking device for finished packaging of traditional Chinese medicine decoction pieces according to claim 1, characterized in that: A fixed frame (201) is fixed on one side of the support frame (101), an electric cylinder (202) is fixed on the fixed frame (201), a push frame (203) is fixed at the output end of the electric cylinder (202), and the laser marking structure includes a laser head (204), which is fixedly connected to the push frame (203).

4. A laser marking device for finished packaging of traditional Chinese medicine decoction pieces according to claim 3, characterized in that: The pushing structure also includes a pushing plate (205), which is fixedly connected to the pushing frame (203). The pushing plate (205) is fixedly connected to the push rod (206), and the surface of the push rod (206) is provided with friction texture.

5. A laser marking device for finished packaging of traditional Chinese medicine decoction pieces according to claim 1, characterized in that: The rotating frame (104) is fixedly connected to the connecting frame (301). The pneumatic push structure includes multiple first air passages (303) opened in the rotating frame (104). An air inlet pipe (302) is fixed on the side of the support frame (101). The air inlet pipe (302) is connected to the first air passages (303).

6. A laser marking device for finished packaging of traditional Chinese medicine decoction pieces according to claim 5, characterized in that: The connecting frame (301) is rotatably connected to the mounting frame (314). The pneumatic push structure also includes a second air passage (304) opened in the mounting frame (314). A blocking structure is installed between the second air passage (304) and the first air passage (303). The second air passage (304) is connected to the first air passage (303).

7. A laser marking device for finished packaging of traditional Chinese medicine decoction pieces according to claim 6, characterized in that: The blocking structure includes a first blocking block (305) fixed in the first air passage (303) and a second blocking block (306) fixed in the second air passage (304). The first blocking block (305) and the second blocking block (306) are in contact. A sealing ring (307) is installed between the connecting frame (301) and the mounting frame (314).

8. A laser marking device for finished packaging of traditional Chinese medicine decoction pieces according to claim 6, characterized in that: The mounting bracket (314) includes a first frame (315) and a second frame (316). The first frame (315) and the second frame (316) are slidably connected. A first sliding groove (308) is provided in the first frame (315). The first sliding groove (308) is connected to the second air passage (304) and the first air passage (303). A sliding frame (309) is fixed on the top of the second frame (316). The sliding frame (309) is located in the first sliding groove (308). A plurality of first springs (310) are fixed between the sliding frame (309) and the groove wall of the first sliding groove (308).

9. A laser marking device for finished packaging of traditional Chinese medicine decoction pieces according to claim 6, characterized in that: The second air passage (304) is equipped with a third block (317). Multiple second springs (313) are fixed between the third block (317) and the second air passage (304). A straight frame is fixed to the bottom of the third block (317). The third block (317) has a structure that is thick at the top and thin in the middle. The top of the third block (317) is in contact with the inner wall of the second air passage (304).

10. A laser marking device for finished packaging of traditional Chinese medicine decoction pieces according to claim 6, characterized in that: The mounting bracket (314) has a second sliding groove (311) at its bottom. The clamping plate (312) is located in the second sliding groove (311). Multiple third springs (318) are fixed between the clamping plate (312) and the groove wall of the second sliding groove (311). A sliding rod (402) is slidably fitted in the second sliding groove (311). One end of the sliding rod (402) is fixedly connected to the clamping plate (312). A connecting channel (401) is opened in the mounting bracket (314). A connecting port (403) is opened between the connecting channel (401) and the second air passage (304). The other end of the sliding rod (402) is slidably fitted in the connecting channel (401).

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