A portable comprehensive internal medicine sign monitoring device

Abstract

This utility model belongs to the field of vital sign monitoring technology, specifically a convenient comprehensive internal medicine vital sign monitoring device, including a vital sign monitoring shell; a handle is fixedly connected to the top side wall of the vital sign monitoring shell; a movable block slides on the inner wall of the bottom of the vital sign monitoring shell; a support plate is rotatably connected to the inner wall of the end of the movable block; an air hole is opened on the side wall of the support plate; multiple suction cups are fixedly connected to the bottom of the support plate; a circular plate is slidably connected to the middle of the support plate; an insertion rod slides through the bottom of the support plate; the top of the insertion rod is fixedly connected to the bottom of the circular plate; and an air hole is opened on the top of the suction cup. Through the cooperation of the support plate, suction cups, air hole one, air hole two, spring two, circular plate and insertion rod, the vital sign monitoring shell can be effectively fixed when placed on a platform, reducing the risk of displacement or tipping due to minor external vibrations or collisions, and improving its stability.

Description

Technical Field

[0001] This utility model belongs to the field of vital sign monitoring technology, specifically a convenient comprehensive internal medicine vital sign monitoring device. Background Technology

[0002] Portable integrated internal medicine vital signs monitoring devices play a crucial role in the real-time tracking and diagnosis of patients' health status. They allow for regular monitoring of patients' vital signs. Most portable integrated internal medicine vital signs monitoring devices are small in size and weight, making them easy for medical staff to carry. Whether moving quickly between different wards within a hospital or providing medical services in the field or community, they do not place too much burden on the user.

[0003] However, some portable comprehensive internal medicine vital signs monitoring devices have obvious problems in actual use. These devices are often placed haphazardly on various platforms, resulting in poor stability. Their bottoms are mostly small flat surfaces with limited contact with the placement surface, insufficient friction, and difficulty in resisting minor external vibrations or collisions. They are prone to displacement and tipping over with slight contact with the platform. In temporary medical facilities such as ambulances, the continuous bumps and swaying of the vehicle make the simply placed monitoring devices even more vulnerable, and they may fall and be damaged at any time, causing monitoring interruption. This not only damages the equipment and increases medical costs, but also delays the monitoring and diagnosis of the patient's condition. Therefore, a portable comprehensive internal medicine vital signs monitoring device is proposed to address the above problems. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology and solve at least one of the technical problems mentioned in the background technology, this utility model proposes a convenient comprehensive internal medicine vital signs monitoring device.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: A convenient comprehensive internal medicine vital sign monitoring device of this utility model includes a vital sign monitoring shell; a handle is fixedly connected to the top side wall of the vital sign monitoring shell; a moving block is slidably connected to the inner wall of the bottom of the vital sign monitoring shell; a support plate is rotatably connected to the inner wall of the end of the moving block; an air hole is opened on the side wall of the support plate; multiple suction cups are fixedly connected to the bottom of the support plate; a circular plate is slidably connected to the middle of the support plate; an insertion rod is slidably connected through the bottom of the support plate; the top of the insertion rod is fixedly connected to the bottom of the circular plate; an air hole is opened on the top of the suction cup; the outer wall of the bottom of the insertion rod contacts the inner wall of the air hole; a spring is sleeved on the outer wall of the insertion rod; one end of the spring is fixedly connected to the bottom of the circular plate; the other end of the spring is fixedly connected to the middle of the support plate.

[0006] Preferably, the vital signs monitoring housing has an L-shaped groove in the middle; the other end of the moving block is slidably connected to the inner wall of the L-shaped groove; the side wall of the moving block is provided with a connecting plate; the side wall of the vital signs monitoring housing has an L-shaped through groove; the connecting plate passes through the L-shaped through groove and is fixed to the side wall of the moving block; the side wall of the connecting plate is threaded with a bolt; the side wall of the vital signs monitoring housing has multiple sets of threaded holes; the outer wall of the bolt end is threaded to the inner wall of the threaded hole.

[0007] Preferably, a fixed shell is fixedly connected to the side wall of the vital signs monitoring housing; a rectangular shell is elastically connected to the inner wall of the fixed shell via a spring; the rectangular shell is slidably connected to the inner wall of the fixed shell; one end of the spring is fixedly connected to the inner wall of the fixed shell; the other end of the spring is fixedly connected to the inner wall of the rectangular shell; a pressure plate is fixedly connected to the end of the rectangular shell; multiple sets of fixed shells, pressure plates, and rectangular shells are provided; and multiple sets of fixed shells, pressure plates, and rectangular shells are symmetrically arranged on the side wall of the vital signs monitoring housing.

[0008] Preferably, a rectangular plate is elastically connected to the other middle part of the support plate via a spring; the rectangular plate is slidably connected to the other middle part of the support plate; one end of the spring is fixedly connected to the other middle part of the support plate; the other end of the spring is fixedly connected to the side wall of the rectangular plate; a limiting block is fixedly connected to the side wall of the rectangular plate; the limiting block is slidably connected to the inner wall of the other middle part of the support plate; a rectangular through groove is formed on the inner wall of the end of the moving block; the end of the limiting block contacts the inner wall of the rectangular through groove; a rectangular through groove is formed on the top of the support plate; a push block is provided on the top of the rectangular plate; the push block passes through the rectangular through groove and is fixedly connected to the top of the rectangular plate.

[0009] Preferably, a round rod is fixedly connected to the top of the round plate; the round rod is slidably connected to the top of the support plate; and a pull plate is fixedly connected to the top of the round rod.

[0010] Preferably, the sidewall of the movable block is rotatably connected to a ball bearing on one side of the connecting plate; the ball bearing rolls on the inner wall of the L-shaped groove.

[0011] Preferably, the sidewall of the limiting block is square.

[0012] The beneficial effects of this utility model are:

[0013] 1. This utility model provides a convenient integrated internal medicine vital sign monitoring device. Through the cooperation of the set support plate, suction cup, air hole one, air hole two, spring two, circular plate and plug rod, it can ensure that the vital sign monitoring shell can be effectively fixed when placed on the platform, reducing the risk of displacement or tipping due to minor external vibrations or collisions, and improving its stability.

[0014] 2. This utility model provides a convenient integrated internal medicine vital signs monitoring device. Through the cooperation between the connecting plate, bolts and moving block, the support plate can be rotated and moved to hang on the railing of the hospital bed, which improves the applicability of the vital signs monitoring shell. In addition, the wires connected to the vital signs monitoring shell can also be wound around the outside of multiple sets of fixed shells. In this way, medical staff do not need to disassemble and store the wires or hoses connected to the blood oxygen saturation probe, body temperature probe and blood pressure cuff when monitoring the vital signs monitoring shell. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0016] Figure 1 This is a perspective view of the overall device of this utility model;

[0017] Figure 2 This is a perspective view of the vital signs monitoring shell and the fixing shell in this utility model;

[0018] Figure 3 This is a rear perspective view of the overall device in this utility model;

[0019] Figure 4 This is a three-dimensional view of the vital signs monitoring shell and the moving block in this utility model;

[0020] Figure 5 This is a three-dimensional sectional view of the fixed shell and pressure plate in this utility model.

[0021] Figure 6 This is a three-dimensional sectional view of the support plate and the movable block in this utility model.

[0022] Figure 7 This utility model Figure 6 A magnified 3D view of region A.

[0023] Legend:

[0024] 1. Vital signs monitoring housing; 2. Handle; 3. L-shaped through groove; 4. Threaded hole; 5. Fixing shell; 51. Pressure plate; 52. Rectangular shell; 53. Spring 1; 6. Support plate; 61. Suction cup; 62. Pull plate; 63. Air hole 1; 64. Round rod; 65. Air hole 2; 66. Spring 2; 67. Round plate; 68. Insert rod; 7. Connecting plate; 71. Bolt; 72. Moving block; 73. Ball bearing; 8. Push block; 81. Limiting block; 82. Spring 3; 83. Rectangular plate; 84. Rectangular through groove; 9. L-shaped slide groove. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] Specific implementation examples are given below.

[0027] Example 1

[0028] Please see Figure 1 - Figure 7 This utility model provides a convenient comprehensive internal medicine vital sign monitoring device, including a vital sign monitoring shell 1; a handle 2 is fixedly connected to the top side wall of the vital sign monitoring shell 1; a movable block 72 slides on the inner wall of the bottom of the vital sign monitoring shell 1; a support plate 6 is rotatably connected to the inner wall of the end of the movable block 72; an air hole 63 is opened on the side wall of the support plate 6; multiple suction cups 61 are fixedly connected to the bottom of the support plate 6; a circular plate 67 is slidably connected to the middle of the support plate 6; an insertion rod 68 slides through the bottom of the support plate 6; the top of the insertion rod 68 is fixedly connected to the bottom of the circular plate 67; an air hole 65 is opened on the top of the suction cup 61; the outer wall of the bottom of the insertion rod 68 contacts the inner wall of the air hole 65; a spring 66 is sleeved on the outer wall of the insertion rod 68; one end of the spring 66 is fixedly connected to the bottom of the circular plate 67; the other end of the spring 66... The end is fixed to the middle of the support plate 6. During operation, when medical staff place the vital signs monitoring housing 1 on the support platform, they can press down on the support plate 6. At this time, the suction cup 61 will be squeezed, and the air inside the suction cup 61 will push the insertion rod 68 to detach from the inner wall of the second air hole 65, and then be discharged through the first air hole 63. During this process, the second spring 66 will drive the circular plate 67 to move, and the circular plate 67 will stretch the second spring 66 until the air inside the suction cup 61 is completely discharged to form a negative pressure. At this time, the insertion rod 68 will be reset under the elastic action of the second spring 66 and inserted into the inner wall of the second air hole 65. In this way, the suction cup 61 will be stably attached to the placement platform, reducing the risk of displacement or tipping of the vital signs monitoring housing 1 due to minor external vibrations or collisions, and improving the stability of the vital signs monitoring housing 1 placed on the platform.

[0029] Example 2

[0030] Furthermore, such as Figure 3 - Figure 4As shown, the vital signs monitoring housing 1 has an L-shaped groove 9 in the middle; the other end of the moving block 72 is slidably connected to the inner wall of the L-shaped groove 9; the side wall of the moving block 72 has a connecting plate 7; the side wall of the vital signs monitoring housing 1 has an L-shaped through groove 3; the connecting plate 7 passes through the L-shaped through groove 3 and is fixed to the side wall of the moving block 72; the side wall of the connecting plate 7 is threaded with a bolt 71; the side wall of the vital signs monitoring housing 1 has multiple sets of threaded holes 4; the outer wall of the bolt 71 is threaded to the inner wall of the threaded hole 4. During operation, when medical staff use the vital signs monitoring housing 1 to monitor the patient's vital signs, other items may be placed on the cabinet next to the patient's bed. If an object prevents the vital signs monitoring housing 1 from being placed on it, medical staff can rotate bolt 71 to disengage it from the inner wall of threaded hole 4. This allows the connecting plate 7 to slide along the inner wall of L-shaped groove 3. The connecting plate 7 will then drive the moving block 72 to slide along the inner wall of L-shaped slide groove 9 until the connecting plate 7 moves to the other end of L-shaped groove 3. At this point, the end of the moving block 72 will move to the other end of L-shaped slide groove 9, and a part of the moving block 72 will also move out from the middle of the vital signs monitoring housing 1. Then, the support plate 6 can be rotated to a vertical position, allowing the vital signs monitoring housing 1 to be hung on the patient's bed rail, thus improving the overall applicability of the device.

[0031] Example 3

[0032] Furthermore, such as Figure 2 and Figure 5 As shown, a fixed shell 5 is fixedly connected to the side wall of the vital signs monitoring housing 1; a rectangular shell 52 is elastically connected to the inner wall of the fixed shell 5 via a spring 53; the rectangular shell 52 is slidably connected to the inner wall of the fixed shell 5; one end of the spring 53 is fixedly connected to the inner wall of the fixed shell 5; the other end of the spring 53 is fixedly connected to the inner wall of the rectangular shell 52; a pressure plate 51 is fixedly connected to the end of the rectangular shell 52; multiple sets of fixed shells 5, pressure plates 51, and rectangular shells 52 are provided; and multiple sets of fixed shells 5, pressure plates 51, and rectangular shells 52 are symmetrically arranged on the side wall of the vital signs monitoring housing 1. During operation, medical personnel need to insert the blood oxygen saturation probe, body temperature probe, and blood pressure cuff into the vital signs monitoring housing 1. The device monitors the patient's vital signs. The oxygen saturation probe, temperature probe, and blood pressure cuff are connected by wires or hoses. After use, they can be wrapped around the outer wall of multiple sets of fixing shells 5. During the wrapping process, the pressure plate 51 moves as the number of wraps increases. The pressure plate 51 drives the rectangular shell 52 to move, and the rectangular shell 52 stretches the spring 53. The spring 53 uses its elasticity to fix the wrapped oxygen saturation probe, temperature probe, and blood pressure cuff, ensuring their stability. This way, medical staff do not need to repeatedly disassemble and reassemble the oxygen saturation probe, temperature probe, and blood pressure cuff for storage, improving convenience.

[0033] Example 4

[0034] Furthermore, such as Figure 4 and Figure 6 As shown, a rectangular plate 83 is elastically connected to the other middle part of the support plate 6 via a spring 82; the rectangular plate 83 is slidably connected to the other middle part of the support plate 6; one end of the spring 82 is fixed to the other middle part of the support plate 6; the other end of the spring 82 is fixed to the side wall of the rectangular plate 83; a limiting block 81 is fixed to the side wall of the rectangular plate 83; the limiting block 81 is slidably connected to the inner wall of the other middle part of the support plate 6; a rectangular through groove 84 is provided on the inner wall of the end of the moving block 72; the end of the limiting block 81 contacts the inner wall of the rectangular through groove 84; a rectangular through groove 84 is provided on the top of the support plate 6; a push block 8 is provided on the top of the rectangular plate 83; the push block 8 passes through the rectangular through groove 84 and is fixed to the top of the rectangular plate 83. During operation, by inserting the limiting block 81 into the inner wall of the rectangular through groove 84, the support plate can be... The connection point between the support plate 6 and the movable block 72 is limited to reduce the risk of arbitrary rotation between the support plate 6 and the movable block 72. When it is necessary to rotate the support plate 6, a part of the movable block 72 should be pulled out of the inner wall of the vital signs monitoring housing 1. At this time, the push block 8 can be pushed, which will drive the rectangular plate 83 to move. The rectangular plate 83 will squeeze the spring 82 and drive the limiting block 81 to move until the limiting block 81 is disengaged from the inner wall of the rectangular through groove 84. Then the support plate 6 can be rotated from the horizontal state to the vertical state. Then the push block 8 can be released. At this time, the spring 82 will push the rectangular plate 83 and the limiting block 81 to move in opposite directions to reset through its own elasticity. This will allow the limiting block 81 to insert into the inner wall of the rectangular through groove 84 to limit the support plate 6 again and ensure the stability of the support plate 6.

[0035] Furthermore, such as Figure 6 - Figure 7 As shown, a round rod 64 is fixedly connected to the top of the round plate 67; the round rod 64 is slidably connected to the top of the support plate 6; a pull plate 62 is fixedly connected to the top of the round rod 64. During operation, when it is necessary to remove the vital signs monitoring housing 1 from the platform, the pull plate 62 can be pulled. The pull plate 62 will drive multiple sets of round rods 64 to move synchronously. In this way, the multiple sets of round rods 64 will drive the round plate 67 and the insertion rod 68 connected to them to move synchronously. This will open the second air hole 65 of multiple sets of suction cups 61 at the same time. When the vital signs monitoring housing 1 is pulled, the outside air will enter the interior of the suction cup 61 through the first air hole 63 and the second air hole 65, thereby relieving the negative pressure state of the suction cup 61. In this way, the vital signs monitoring housing 1 can be easily removed, improving practicality.

[0036] Furthermore, such as Figure 4 and Figure 6As shown, the side wall of the movable block 72 is rotatably connected to a ball bearing 73 on one side of the connecting plate 7; the ball bearing 73 rolls on the inner wall of the L-shaped slide groove 9. When the movable block 72 moves, it will drive the ball bearing 73 to roll on the inner wall of the L-shaped slide groove 9 to ensure the smooth movement of the movable block 72.

[0037] Furthermore, such as Figure 6 As shown, the side wall of the limiting block 81 is set to a square. During operation, the side wall of the limiting block 81 is set to a square and is adapted to the inner wall of the rectangular through groove 84 to ensure that the support plate 6 can be limited by the limiting block 81 in both horizontal and vertical states, and to ensure that the support plate 6 can be used stably in both states.

[0038] Working principle: When medical staff place the vital signs monitoring housing 1 on the support platform, they can press down on the support plate 6. This will compress the suction cup 61, causing the air inside the suction cup 61 to push the insertion rod 68 away from the inner wall of the second air hole 65, and then expel it through the first air hole 63. During this process, the second spring 66 will drive the circular plate 67 to move, and the circular plate 67 will stretch the second spring 66 until the air inside the suction cup 61 is completely expelled, creating a negative pressure. At this time, the insertion rod 68 will be reset under the elastic action of the second spring 66 and insert into the inner wall of the second air hole 65. In this way, the suction cup 61 will be stably attached to the placement platform, reducing the impact of minor external vibrations during placement. To mitigate the risk of displacement or tipping of the vital signs monitoring housing 1 due to movement or collision, and to improve the stability of the vital signs monitoring housing 1 on the platform, when it is necessary to remove the vital signs monitoring housing 1, the pull plate 62 can be pulled. The pull plate 62 will drive multiple sets of round rods 64 to move synchronously. In this way, the multiple sets of round rods 64 will drive the round plates 67 and the insertion rods 68 connected to them to move synchronously. This will open the air holes 65 of the multiple sets of suction cups 61 at the same time. When the vital signs monitoring housing 1 is pulled, outside air will enter the interior of the suction cups 61 through the air holes 63 and 65, thereby relieving the negative pressure state of the suction cups 61, so that the vital signs monitoring housing 1 can be easily removed.

[0039] When medical staff use the vital signs monitoring housing 1 to monitor a patient's vital signs, other items may be placed on the cabinet next to the patient's bed, preventing the vital signs monitoring housing 1 from being placed on it. In this case, the medical staff can rotate the bolt 71 to disengage it from the inner wall of the threaded hole 4. Then, the connecting plate 7 can be pushed to slide on the inner wall of the L-shaped through groove 3. The connecting plate 7 will drive the moving block 72 to slide on the inner wall of the L-shaped slide groove 9 until the connecting plate 7 moves to the other end of the L-shaped through groove 3. At this time, the end of the moving block 72 will move to the other end of the L-shaped slide groove 9, and a part of the moving block 72 will also move out from the middle of the vital signs monitoring housing 1. Then, the push block 8 can be pushed to release the limiting block 81 from the limiting plate 6. Then, the supporting plate 6 can be rotated to make it vertical. In this way, the vital signs monitoring housing 1 can be hung on the patient's bed rail, improving the applicability of the overall device.

[0040] Medical staff need to connect the pulse oximeter probe, temperature probe, and blood pressure cuff to the vital signs monitoring housing 1 to monitor the patient's vital signs. The pulse oximeter probe, temperature probe, and blood pressure cuff are mostly connected by wires or tubes. After use, they can be wrapped around the outer wall of multiple sets of fixing housings 5. During the wrapping process, the pressure plate 51 will move as the number of wraps increases. The pressure plate 51 will drive the rectangular housing 52 to move. The rectangular housing 52 will stretch the spring 53. The spring 53 will fix the wrapped pulse oximeter probe, temperature probe, and blood pressure cuff with its own elasticity to ensure its stability. In this way, medical staff do not need to repeatedly disassemble and reassemble the pulse oximeter probe, temperature probe, and blood pressure cuff for storage, which improves convenience.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A portable integrated medical sign monitoring device, comprising a sign monitoring shell (1); characterized in that: The vital signs monitoring housing (1) has a handle (2) fixedly attached to the top side wall; a movable block (72) slides on the inner wall of the bottom of the vital signs monitoring housing (1); a support plate (6) is rotatably connected to the inner wall of the end of the movable block (72); an air hole (63) is opened on the side wall of the support plate (6); a suction cup (61) is fixedly attached to the bottom of the support plate (6) in multiple sets; a circular plate (67) is slidably connected to the middle of the support plate (6); the bottom of the support plate (6) A rod (68) is slidably inserted through the part; the top of the rod (68) is fixed to the bottom of the circular plate (67); the top of the suction cup (61) is provided with an air hole (65); the outer wall of the bottom of the rod (68) contacts the inner wall of the air hole (65); a spring (66) is sleeved on the outer wall of the rod (68); one end of the spring (66) is fixed to the bottom of the circular plate (67); the other end of the spring (66) is fixed to the middle of the support plate (6).

2. The portable integrated internal medical sign monitoring device according to claim 1, characterized in that: The vital signs monitoring housing (1) has an L-shaped groove (9) in the middle; the other end of the moving block (72) is slidably connected to the inner wall of the L-shaped groove (9); the side wall of the moving block (72) is provided with a connecting plate (7); the side wall of the vital signs monitoring housing (1) has an L-shaped through groove (3); the connecting plate (7) passes through the L-shaped through groove (3) and is fixed to the side wall of the moving block (72); the side wall of the connecting plate (7) is threadedly connected with a bolt (71); the side wall of the vital signs monitoring housing (1) has multiple sets of threaded holes (4); the outer wall of the end of the bolt (71) is threadedly connected to the inner wall of the threaded hole (4).

3. The portable integrated internal medical sign monitoring device according to claim 1, characterized in that: The vital signs monitoring housing (1) has a fixed shell (5) fixedly connected to its side wall; the inner wall of the fixed shell (5) is elastically connected to a rectangular shell (52) via a spring (53); the rectangular shell (52) is slidably connected to the inner wall of the fixed shell (5); one end of the spring (53) is fixedly connected to the inner wall of the fixed shell (5); the other end of the spring (53) is fixedly connected to the inner wall of the rectangular shell (52); a pressure plate (51) is fixedly connected to the end of the rectangular shell (52); multiple sets of the fixed shell (5), pressure plate (51), and rectangular shell (52) are provided; and multiple sets of fixed shell (5), pressure plate (51), and rectangular shell (52) are symmetrically arranged on the side wall of the vital signs monitoring housing (1).

4. The portable integrated internal medical sign monitoring device according to claim 1, characterized in that: A rectangular plate (83) is elastically connected to the other middle part of the support plate (6) via a spring three (82); the rectangular plate (83) is slidably connected to the other middle part of the support plate (6); one end of the spring three (82) is fixed to the other middle part of the support plate (6); the other end of the spring three (82) is fixed to the side wall of the rectangular plate (83); a limiting block (81) is fixed to the side wall of the rectangular plate (83); the limiting block (81) is slidably connected to the inner wall of the other middle part of the support plate (6); a rectangular through groove (84) is opened on the inner wall of the end of the moving block (72); the end of the limiting block (81) contacts the inner wall of the rectangular through groove (84); a rectangular through groove (84) is opened on the top of the support plate (6); a push block (8) is provided on the top of the rectangular plate (83); the push block (8) passes through the rectangular through groove (84) and is fixed to the top of the rectangular plate (83).

5. The portable integrated internal medical sign monitoring device according to claim 1, characterized in that: A round rod (64) is fixedly connected to the top of the round plate (67); the round rod (64) is slidably connected to the top of the support plate (6); a pull plate (62) is fixedly connected to the top of the round rod (64).

6. The portable integrated internal medical sign monitoring device according to claim 2, characterized in that: The sidewall of the movable block (72) is rotatably connected to a ball bearing (73) on one side of the connecting plate (7); the ball bearing (73) rolls on the inner wall of the L-shaped groove (9).

7. A convenient comprehensive internal medicine vital signs monitoring device according to claim 4, characterized in that: The sidewall of the limiting block (81) is set as a square.

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