Medicine cold closet for tumor treatment

Abstract

The invention relates to the technical field of medicine refrigerated containers, in particular to a medicine refrigerated container for tumor treatment, which comprises a medicine refrigerated container main body, a heat preservation box door is hinged to the medicine refrigerated container main body, a movable frame is arranged in the heat preservation box door in a sliding fit manner, an adjusting seat is arranged on the movable frame in a sliding fit manner, and a medicine receiving partition seat is fixedly connected to the adjusting seat. A medicine pushing mechanism is rotationally connected into the medicine receiving partition seat, a plurality of refrigerating pipes are fixedly connected into the medicine refrigerating box body, medicine storage mechanisms are fixedly connected into the refrigerating pipes, and a heat preservation plate in the medicine receiving partition seat can seal cold air in the medicine refrigerating box, so that the temperature difference between the inside and the outside of the refrigerating box door can be effectively closed; the cold air loss caused by frequent medicine taking is avoided, the internal temperature of the cold closet is kept more stable, and the cold closet is especially crucial to temperature-sensitive medicines such as CAR-T cell medicines, so that the energy consumption of a refrigerating system is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of medicine refrigerators, and in particular to a medicine refrigerator for tumor treatment. Background Art

[0002] Tumor treatment drug refrigerators usually refer to special refrigeration equipment used to store cancer treatment-related drugs (such as chemotherapy drugs, biological agents, immunotherapy drugs, etc.). These drugs have strict temperature requirements and must be stored in a certain low temperature environment to ensure their effectiveness and safety. Refrigerator is not only used in hospitals, clinics and drug distribution centers, but also in research institutions and drug storage management.

[0003] The main function of a cancer drug refrigerator is to ensure that the drug is kept within the recommended temperature range during transportation and storage. This is critical for most cancer drugs, as storing drugs at too high or too low temperatures can reduce or inactivate the drug, and may even cause harmful side effects.

[0004] Oncology drugs, such as certain chemotherapy drugs, biologic drugs, and immunotherapy drugs, are often stored at the following temperatures: Standard refrigeration temperature: Most drugs require storage at a temperature range of 2°C to 8°C. This applies to drugs such as chemotherapy drugs, certain immunotherapy drugs, and antibody drugs.

[0005] Special temperatures: Certain high-end drugs (such as gene therapy, vaccines or cell therapy drugs) may require more stringent temperature control requirements, or even require frozen (-20°C to -80°C) or ultra-low temperature (below -150°C) storage.

[0006] Cell therapy is a treatment method that uses the body's own cells to treat cancer, such as CAR-T cell therapy. In order to maintain the therapeutic effect, the relevant cell preparations must be stored under low temperature conditions. Usually they need to be refrigerated at -80℃ or lower.

[0007] Existing tumor treatment drug refrigerators are not suitable for refrigerating CAR-T cell treatment drugs. Every time you open the refrigerator to take out medicine, the cold air inside the refrigerator leaks out and the hot air enters the box, causing the temperature inside the box to fluctuate. Temperature fluctuations may make the storage environment of the medicine inside the refrigerator unstable. Some medicines are very sensitive to temperature changes, which may cause the medicine to degrade or become ineffective. In order to restore the cold air lost after opening the door, the refrigerator's refrigeration system will consume more energy to lower the temperature again, resulting in increased energy consumption.

[0008] In summary, the prior art lacks a method for taking out drugs in sections for a cold storage box for tumor treatment drugs. Summary of the invention

[0009] The purpose of the present invention is to solve the shortcomings of the background technology and to propose a tumor treatment drug refrigerator.

[0010] To achieve the above objectives, the technical solution adopted by the present invention is: a medicine cold storage box for tumor treatment, comprising a medicine cold storage box main body, an insulated box door hingedly arranged on the medicine cold storage box main body, a movable frame slidingly arranged inside the insulated box door, an adjustment seat slidingly arranged on the movable frame, a medicine receiving compartment seat connected and fixedly arranged on the adjustment seat, a medicine pushing mechanism rotatably arranged inside the medicine receiving compartment seat, a plurality of refrigeration tubes connected and fixedly arranged inside the medicine cold storage box main body, and a medicine storage mechanism connected and fixedly arranged inside the refrigeration tubes.

[0011] Preferably, a baffle is rotatably connected to the opening of the insulation box door, a worm wheel is fixedly connected to one end of the baffle, a worm is meshingly transmitted with a worm on one side of the worm wheel, and the worm is rotatably connected to the inner wall of the insulation box door.

[0012] Preferably, a threaded rod is threadedly connected to the bottom end of the movable frame, and the threaded rod is rotatably connected to the inner wall of the bottom end of the insulation box door. One end of the threaded rod extends to the outside of the insulation box door and is connected and fixedly provided with a motor A. A fixed rack is connected and fixedly provided on the inner wall of the movable frame, and a limiting groove is provided on the movable frame.

[0013] Preferably, a heat-insulating motor cover is fixedly installed on one side of the adjustment seat, the adjustment seat is slidably matched with the inner wall of the limit groove, the top surface of the adjustment seat located inside the heat-insulating motor cover is fixedly installed with a motor B, the output end of the motor B is connected and fixedly provided with an adjustment wheel, and the adjustment wheel is meshed with a fixed rack for transmission.

[0014] Preferably, one side of the medicine receiving compartment seat is arranged in sliding contact with the inner wall of the insulation box door, and the opening on the other side of the medicine receiving compartment seat is symmetrical in structure and slidingly cooperates with two insulation plates, one end of the insulation plate is connected and fixed with a spring, and the other end of the spring is connected and fixed with the inner wall of the medicine receiving compartment seat, and one side of the insulation plate is provided with an inclined surface.

[0015] Preferably, the medicine pushing mechanism comprises a connecting rod group, one end of which is rotatably connected to the inner wall of the medicine receiving compartment seat, and the other end of the connecting rod group is rotatably connected to a medicine pushing plate, and both ends of the medicine pushing plate are slidably matched with the inner wall of the medicine receiving compartment seat.

[0016] Preferably, one end of the connecting rod group connected to the medicine receiving compartment seat extends through the inner wall of the medicine receiving compartment seat to the outside and is fixedly connected to a transmission wheel, one side of the transmission wheel is meshingly transmitted with a transmission rack, the transmission rack is slidingly matched with the medicine receiving compartment seat, one end of the transmission rack is connected and fixedly provided with a tension spring, the other end of the tension spring is connected and fixedly provided with the medicine receiving compartment seat, a contact block is fixedly connected to the side of the transmission rack close to the insulation box door, and the contact block is slidingly contacted with the bottom end of the baffle.

[0017] Preferably, the medicine storage mechanism includes an electric push rod, one end of which is fixedly connected to the inner wall of the refrigeration tube, the other end of which is fixedly connected to a moving block, the moving block is rotatably connected to a transmission rod, the transmission rod is provided with a changing groove, one end of the transmission rod is fixedly connected to a medicine storage seat, the medicine storage seat is provided with a medicine storage groove, the medicine storage seat is slidably matched with the inner wall of the refrigeration tube, a conical head is fixedly connected to the outer end of the medicine storage seat, and the conical head is slidably contacted with the inclined surface on the insulation board.

[0018] Preferably, a guide rod is fixedly connected to the inner wall of the refrigeration tube, and the bottom end of the guide rod is slidably matched with the inner wall of the change-direction groove.

[0019] Compared with the prior art, the present invention has the following beneficial effects: When it is necessary to take out the CAR-T cell therapy drugs in the drug refrigerator, the drug receiving compartment is controlled to move to the corresponding refrigeration tube, and after placing the drugs in the drug receiving compartment, the baffle on the insulation box door is opened to take out the drugs from the drug receiving compartment. At this time, there is no need to open the insulation box door. At the same time, the insulation plate in the drug receiving compartment will seal the cold air in the drug refrigerator, which can effectively close the temperature difference inside and outside the refrigerator door, avoid the loss of cold air caused by frequent taking of drugs, and keep the internal temperature of the refrigerator more stable, which is especially important for temperature-sensitive drugs such as CAR-T cell drugs, thereby reducing the energy consumption of the refrigeration system; By setting a medicine pushing mechanism, when the medicine receiving compartment is moved to the baffle, the baffle is opened and the medicine pushing mechanism is driven to push out the medicine in the medicine receiving compartment, so that the staff can directly take out the medicine, which can significantly improve the convenience and efficiency of taking out the medicine. By setting up a drug storage mechanism in the drug refrigerator and using a drug storage seat with a change-of-direction groove, the drug storage seat can rotate while being inserted into the drug receiving compartment, so that the drugs are automatically poured into the drug receiving compartment, thereby realizing automatic drug retrieval without manual operation. This can not only effectively maintain the stability of the cold chain and reduce the impact of temperature fluctuations on drugs, but also improve the efficiency and accuracy of drug storage and retrieval, ensuring that the drugs are not damaged during the entire management process. In particular, for highly sensitive drugs such as CAR-T cell therapy drugs, this provides an efficient, safe and automated storage and retrieval management method. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of the tumor treatment drug refrigerator of the present invention; Figure 2 This is a schematic diagram of the overall structure of the tumor treatment drug refrigerator of the present invention when it is opened; Figure 3 It is a partial cross-sectional schematic diagram of the structure of the heat preservation box door and other parts of the tumor treatment medicine refrigerator of the present invention; Figure 4 It is a partial cross-sectional schematic diagram of the structure of the insulation box door of the tumor treatment medicine refrigerator of the present invention; Figure 5 This is a schematic diagram of the structure of the mobile rack and other components of the tumor treatment drug refrigerator of the present invention; Figure 6 This is a schematic diagram of the expansion structure of the adjustment seat of the tumor treatment drug refrigerator of the present invention; Figure 7 It is a schematic cross-sectional view of the medicine receiving compartment structure of the tumor treatment medicine refrigerator of the present invention; Figure 8 This is a schematic diagram of the structure of the medicine pushing mechanism of the tumor treatment medicine refrigerator of the present invention; Fig. 9 The present invention is a schematic cross-sectional view of the drug storage mechanism and other structures of the tumor treatment drug refrigerator of the present invention.

[0021] 1. Medicine refrigerator body; 2. Insulated door; 3. Mobile rack; 4. Adjustment seat; 5. Medicine receiving seat; 6. Medicine pushing mechanism; 7. Refrigeration tube; 8. Medicine storage mechanism; 201. Baffle; 202. Worm gear; 203. Worm; 301. Threaded rod; 302. Motor A; 303. Fixed rack; 304. Limiting groove; 401. Insulated motor cover; 402. Motor B; 403. Adjustment wheel ; 501, insulation board; 502, spring; 503, inclined plane; 601, connecting rod group; 602, medicine pushing plate; 603, transmission wheel; 604, transmission rack; 605, tension spring; 606, contact block; 801, electric push rod; 802, moving block; 803, transmission rod; 804, changing groove; 805, medicine storage seat; 806, medicine storage groove; 807, conical head; 701, guide rod. DETAILED DESCRIPTION

[0022] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0023] like Figure 1-Figure 9The medicine cold storage box for tumor treatment shown in the figure comprises a medicine cold storage box body 1, on which an insulated box door 2 is hingedly provided, inside which a movable frame 3 is slidably provided, on which an adjusting seat 4 is slidably provided, on which the adjusting seat 4 is connected and fixedly provided a medicine receiving partition seat 5, inside which a medicine pushing mechanism 6 is rotatably connected, inside which a plurality of refrigeration tubes 7 are connected and fixedly provided, inside which a medicine storing mechanism 8 is connected and fixedly provided.

[0024] like Figure 4 As shown, a baffle 201 is rotatably connected to the opening of the incubator door 2, a worm wheel 202 is fixedly connected to one end of the baffle 201, a worm 203 is meshingly provided on one side of the worm wheel 202, and the worm 203 is rotatably connected to the inner wall of the incubator door 2. The worm 203 is rotated so that the worm 203 drives the baffle 201 connected to the worm wheel 202 to rotate and open.

[0025] like Figure 5 As shown, a threaded rod 301 is threadedly connected at the bottom end of the mobile frame 3, and the threaded rod 301 is rotatably connected to the inner wall of the bottom end of the incubator door 2, one end of the threaded rod 301 extends to the outside of the incubator door 2 and is connected and fixed with a motor A302, a fixed rack 303 is connected and fixedly provided on the inner wall of the mobile frame 3, and a limiting groove 304 is provided on the mobile frame 3. The motor A302 is controlled to drive the threaded rod 301 to rotate, so that the threaded rod 301 drives the mobile frame 3 to move to a suitable position.

[0026] like Figure 6 As shown, a heat-insulating motor cover 401 is fixedly installed on one side of the adjustment seat 4, and the adjustment seat 4 is slidably matched with the inner wall of the limiting groove 304. The top surface of the adjustment seat 4 located in the heat-insulating motor cover 401 is fixedly installed with a motor B402, and the output end of the motor B402 is connected and fixedly provided with an adjustment wheel 403, and the adjustment wheel 403 is meshed with the fixed rack 303 for transmission. The motor B402 is used to drive the adjustment wheel 403 to rotate, and at this time, the adjustment wheel 403 will mesh with the fixed rack 303, thereby driving the adjustment seat 4 to slide on the mobile frame 3, thereby driving the medicine receiving partition seat 5 to align with the refrigeration tube 7 where the medicine is placed.

[0027] like Figure 7 As shown, one side of the medicine receiving partition seat 5 is in sliding contact with the inner wall of the insulation box door 2, and the other side of the medicine receiving partition seat 5 is symmetrically structured and slidably matched with two insulation plates 501, one end of the insulation plate 501 is connected and fixedly provided with a spring 502, and the other end of the spring 502 is connected and fixedly provided with the inner wall of the medicine receiving partition seat 5, and one side of the insulation plate 501 is provided with an inclined surface 503. The spring 502 will drive the insulation plate 501 to reset and seal the opening of the medicine receiving partition seat 5.

[0028] like Figure 8As shown, the medicine pushing mechanism 6 includes a connecting rod group 601, one end of the connecting rod group 601 is rotatably connected to the inner wall of the medicine receiving compartment 5, and the other end of the connecting rod group 601 is rotatably connected to a medicine pushing plate 602, and both ends of the medicine pushing plate 602 are slidably matched with the inner wall of the medicine receiving compartment 5.

[0029] One end of the connecting rod group 601 connected to the medicine receiving compartment seat 5 passes through the inner wall of the medicine receiving compartment seat 5 to extend to the outside and is connected and fixedly provided with a transmission wheel 603, one side of the transmission wheel 603 is meshingly transmitted with a transmission rack 604, the transmission rack 604 is slidably matched with the medicine receiving compartment seat 5, one end of the transmission rack 604 is connected and fixedly provided with a tension spring 605, the other end of the tension spring 605 is connected and fixedly provided with the medicine receiving compartment seat 5, the side of the transmission rack 604 close to the insulation box door 2 is connected and fixedly provided with a contact block 606, and the contact block 606 is slidably contacted with the bottom end of the baffle 201. The bottom end of the baffle 201 will contact and squeeze the contact block 606, causing the transmission rack 604 connected to the contact block 606 to move. At this time, the transmission rack 604 will drive the connecting rod group 601 connected to the transmission wheel 603 to rotate, thereby driving the medicine pushing plate 602 to move, pushing the medicine out for easy removal. Then, when the baffle 201 is closed, the contact block 606 is not restricted, and under the action of the tension spring 605, it will drive the transmission rack 604 to reset, thereby causing the connecting rod group 601 to drive the medicine pushing plate 602 to reset.

[0030] like Fig. 9 As shown, the medicine storage mechanism 8 includes an electric push rod 801, one end of which is connected and fixed to the inner wall of the refrigeration tube 7, and the other end of the electric push rod 801 is connected and fixed to a moving block 802, and a transmission rod 803 is rotatably connected to the moving block 802, and a direction-changing groove 804 is provided on the transmission rod 803, and a medicine storage seat 805 is connected and fixed to one end of the transmission rod 803, and a medicine storage groove 806 is provided on the medicine storage seat 805, and the medicine storage seat 805 is slidably matched with the inner wall of the refrigeration tube 7, and a conical head 807 is connected and fixed to the outer end of the medicine storage seat 805, and the conical head 807 is slidably contacted with the inclined surface 503 on the insulation board 501. One end of the direction-changing groove 804 is arranged in a spiral structure, and the other end is arranged in a linear structure. The electric push rod 801 is used to drive the moving block 802 to move, which will drive the medicine storage seat 805 to move out of the refrigeration tube 7, and then the conical head 807 on the refrigeration tube 7 will contact the inclined surface 503 on the insulation plate 501, thereby pushing open the two insulation plates 501, so that the refrigeration tube 7 is inserted into the medicine receiving compartment 5, and then under the action of the guide rod 701, when the spiral position of the change-direction groove 804 on the transmission rod 803 slides in contact with one end of the guide rod 701, it will drive the medicine storage seat 805 connected to the transmission rod 803 to flip over, so that the medicine in the medicine storage groove 806 can fall into the medicine receiving compartment 5.

[0031] A guide rod 701 is fixedly connected to the inner wall of the refrigeration pipe 7 , and the bottom end of the guide rod 701 is slidably matched with the inner wall of the change-direction groove 804 .

[0032] Working principle: When the medicine refrigerator body 1 is in use, the CAR-T cell therapy drugs are refrigerated and stored by setting a low temperature of -80°C. When the CAR-T cell therapy drugs in the medicine refrigerator body 1 need to be taken out, the motor A302 is first controlled to drive the threaded rod 301 to rotate, so that the threaded rod 301 drives the mobile frame 3 to move to a suitable position, and then the motor B402 is used to drive the adjusting wheel 403 to rotate. At this time, the adjusting wheel 403 will engage with the fixed rack 303, thereby driving the adjusting seat 4 to slide on the mobile frame 3, thereby driving the medicine receiving seat 5 to align with the refrigeration tube 7 where the drugs are placed; Then, the electric push rod 801 is used to drive the moving block 802 to move, and at this time, the medicine storage seat 805 will be moved out of the refrigeration tube 7, and then the conical head 807 on the refrigeration tube 7 will contact the inclined surface 503 on the insulation plate 501, thereby pushing open the two insulation plates 501, so that the refrigeration tube 7 is inserted into the medicine receiving compartment 5, and then under the action of the guide rod 701, when the spiral position of the deflection groove 804 on the transmission rod 803 slides in contact with one end of the guide rod 701, the medicine storage seat 805 connected to the transmission rod 803 will be turned over, so that the medicine in the medicine storage groove 806 can fall into the medicine receiving compartment 5, and then after the medicine storage seat 805 is retracted into the refrigeration tube 7, the spring 502 will drive the insulation plate 501 to reset and seal the opening of the medicine receiving compartment 5; Then, by controlling the movable frame 3 and the adjustment seat 4, the medicine receiving spacer seat 5 is moved to the baffle 201, and then by rotating the worm 203, the worm 203 drives the baffle 201 connected to the worm wheel 202 to rotate and open. At this time, the bottom end of the baffle 201 will contact and squeeze the contact block 606, so that the transmission rack 604 connected to the contact block 606 moves. At this time, the transmission rack 604 will drive the connecting rod group 601 connected to the transmission wheel 603 to rotate, thereby driving the medicine pushing plate 602 to move, pushing out the medicine for easy taking, and then when the baffle 201 is closed, the contact block 606 is not restricted, and under the action of the tension spring 605, it will drive the transmission rack 604 to reset, so that the connecting rod group 601 drives the medicine pushing plate 602 to reset.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A medicine refrigerator for tumor treatment, comprising a medicine refrigerator body (1), characterized in that: The medicine refrigerator body (1) is hingedly provided with an insulation box door (2), a movable frame (3) is slidably provided inside the insulation box door (2), an adjustment seat (4) is slidably provided on the movable frame (3), a medicine receiving compartment (5) is connected and fixedly provided on the adjustment seat (4), a medicine pushing mechanism (6) is rotatably connected and provided inside the medicine receiving compartment (5), a plurality of refrigeration pipes (7) are connected and fixedly provided inside the medicine refrigerator body (1), and a medicine storage mechanism (8) is connected and fixedly provided inside the refrigeration pipes (7).

2. The tumor treatment drug refrigerator according to claim 1, characterized in that: A baffle (201) is rotatably connected to the opening of the thermal insulation box door (2); a worm wheel (202) is fixedly connected to one end of the baffle (201); a worm (203) is meshingly driven on one side of the worm wheel (202); and the worm (203) is rotatably connected to the inner wall of the thermal insulation box door (2).

3. The tumor treatment drug refrigerator according to claim 1, characterized in that: A threaded rod (301) is threadedly connected to the bottom end of the movable frame (3); the threaded rod (301) is rotatably connected to the inner wall of the bottom end of the incubator door (2); one end of the threaded rod (301) extends to the outside of the incubator door (2) and is connected and fixedly provided with a motor A (302); a fixed rack (303) is connected and fixedly provided on the inner wall of the movable frame (3); and a limiting groove (304) is provided on the movable frame (3).

4. The tumor treatment drug refrigerator according to claim 1, characterized in that: A heat-insulating motor cover (401) is fixedly mounted on one side of the adjustment seat (4); the adjustment seat (4) is slidably matched with the inner wall of the limiting groove (304); a motor B (402) is fixedly mounted on the top surface of the adjustment seat (4) located inside the heat-insulating motor cover (401); an adjustment wheel (403) is fixedly connected to the output end of the motor B (402); and the adjustment wheel (403) is meshed with the fixed rack (303) for transmission.

5. The tumor treatment drug refrigerator according to claim 1, characterized in that: One side of the medicine receiving partition seat (5) is arranged in sliding contact with the inner wall of the insulation box door (2), and the other side opening of the medicine receiving partition seat (5) is provided with two insulation plates (501) in a vertically symmetrical structure for sliding cooperation, one end of the insulation plate (501) is connected and fixedly provided with a spring (502), and the other end of the spring (502) is connected and fixedly provided with the inner wall of the medicine receiving partition seat (5), and one side of the insulation plate (501) is provided with an inclined surface (503).

6. The tumor treatment drug refrigerator according to claim 1, characterized in that: The medicine pushing mechanism (6) comprises a connecting rod group (601), one end of the connecting rod group (601) is rotatably connected to the inner wall of the medicine receiving compartment (5), and the other end of the connecting rod group (601) is rotatably connected to a medicine pushing plate (602), and both ends of the medicine pushing plate (602) are slidably matched with the inner wall of the medicine receiving compartment (5).

7. The tumor treatment drug refrigerator according to claim 6, characterized in that: One end of the connecting rod group (601) connected to the medicine receiving compartment seat (5) passes through the inner wall of the medicine receiving compartment seat (5) and extends to the outside and is connected and fixedly provided with a transmission wheel (603); one side of the transmission wheel (603) is provided with a transmission rack (604) for meshing transmission; the transmission rack (604) is provided in sliding cooperation with the medicine receiving compartment seat (5); one end of the transmission rack (604) is connected and fixedly provided with a tension spring (605); the other end of the tension spring (605) is connected and fixedly provided with the medicine receiving compartment seat (5); a contact block (606) is connected and fixedly provided on the side of the transmission rack (604) close to the heat preservation box door (2); and the contact block (606) is provided in sliding contact with the bottom end of the baffle (201).

8. The tumor treatment drug refrigerator according to claim 1, characterized in that: The medicine storage mechanism (8) comprises an electric push rod (801), one end of which is connected and fixedly arranged with the inner wall of the refrigeration tube (7), and the other end of which is connected and fixedly arranged with a moving block (802), and a transmission rod (803) is rotatably connected to the moving block (802), and a direction-changing groove (804) is provided on the transmission rod (803), and one end of the transmission rod (803) is connected and fixedly arranged with a medicine storage seat (805), and a medicine storage groove (806) is provided on the medicine storage seat (805), and the medicine storage seat (805) is slidably matched with the inner wall of the refrigeration tube (7), and a conical head (807) is connected and fixedly arranged at the outer end of the medicine storage seat (805), and the conical head (807) is slidably contacted with the inclined surface (503) on the insulation plate (501).

9. The tumor treatment drug refrigerator according to claim 1, characterized in that: A guide rod (701) is fixedly connected to the inner wall of the refrigeration pipe (7), and the bottom end of the guide rod (701) is slidably matched with the inner wall of the direction-changing groove (804).

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