Visual quantitative salt taking device for heart failure patient

Abstract

The invention discloses a visual heart failure patient quantitative salt taking device, and relates to the technical field of household salt taking devices.The visual heart failure patient quantitative salt taking device comprises a salt taking device, a material taking assembly is arranged at the bottom end of a box body so that automatic salt taking of the salt taking device can be achieved, and a quantitative spoon matched with the salt taking device is further arranged in the material taking assembly; a discharging opening used for discharging is formed in the position, located at the bottom end of the box body, above the quantitative spoon, and a sealing assembly is installed in the discharging opening so that the discharging opening can be sealed. By arranging the salt taking device and the material taking assembly, full-automatic quantitative salt taking can be achieved, so that a heart failure patient is assisted in managing and controlling salt intake, and furthermore, information of the salt intake amount can be well provided for a user through informatization recording.

Description

Technical Field

[0001] The invention relates to the technical field of household salt taking devices, and in particular to a visual quantitative salt taking device for patients with heart failure. Background Art

[0002] For patients with heart failure, reasonable salt intake management is very important. According to the latest research and guidelines, practical recommendations for salt intake for patients with heart failure are:

[0003] 1. Patients with mild heart failure: limit daily salt intake to less than 5 grams;

[0004] 2. Patients with moderate heart failure (heart function grade III-IV): daily salt intake should be within 2.5 grams;

[0005] 3. Patients with severe heart failure: daily salt intake should be less than 1 gram.

[0006] Therefore, through salt intake management and lifestyle adjustments, heart failure patients can effectively control their disease and improve their quality of life.

[0007] In the prior art, through follow-up interviews with multiple families of heart failure patients, we found that heart failure patients have the following problems with salt intake:

[0008] 1. The patient's family's salt intake is not accurately calculated and the amount is not well controlled;

[0009] 2. Heart failure patients are older and have impaired memory, so their total daily salt intake is insufficient and inconvenient to calculate.

[0010] In summary, we proposed a device for visualizing quantitative salt intake in patients with heart failure. Summary of the invention

[0011] Based on this, the purpose of the present invention is to provide a visualized quantitative salt taking device for heart failure patients to solve the technical problems in the above-mentioned background technology.

[0012] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a visualized quantitative salt taking device for heart failure patients, comprising a salt taking device, wherein the salt taking device comprises a box cover with an electric control system installed inside, and a display screen for displaying and recording salt taking information is installed on the end face of the box cover, the salt taking device also comprises a box body sealed with the box cover, and a cavity for loading salt is opened inside the box body, an operation button for checking and retrieving salt taking information is also provided on the end face of the box cover located on one side of the display screen, and a start button for starting the salt taking device is also provided on the outside of the operation button, feeding ports for adding materials are provided on both sides of the end face of the box cover, a feeding assembly is provided at the bottom end of the box body to realize automatic salt taking of the salt taking device, a quantitative spoon adapted to the salt taking device is also provided in the feeding assembly, and a feeding port for feeding is opened at the bottom end of the box body above the quantitative spoon, and a sealing assembly is installed in the feeding port to realize sealing of the feeding port.

[0013] By adopting the above technical solution, fully automatic quantitative salt extraction can be achieved, thereby assisting heart failure patients in controlling their salt intake. Further, through information recording, it can provide users with good information on salt intake.

[0014] The present invention is further configured as follows: the material picking assembly includes two groups of vertical plates fixedly connected to both sides of the bottom end of the box body, and the end faces of the vertical plates are provided with sliding grooves, and a screw rod is installed in the sliding groove. The end of the screw rod is located inside the vertical plate, and a driving motor for driving the screw rod to operate is installed, and the driving motor is electrically connected to the electric control system inside the box cover. The outer wall of the screw rod is sleeved with a slider that is adapted to the screw rod and slidably connected to the sliding groove, and the outer walls of the two groups of sliders are fixedly connected with driving plates, and a placement ring is fixedly installed between the two groups of driving plates, and the inner diameter of the placement ring is larger than the outer diameter of the metering spoon.

[0015] By adopting the above technical solution, the effect of automatic salt extraction is achieved.

[0016] The present invention is further configured such that an annular flange is fixedly provided on the outer wall of the metering spoon, and the outer diameter of the annular flange is larger than the inner diameter of the placement ring; a material trough for loading quantitative specification salt is provided inside the metering spoon, and an upwardly extending push rod is also installed in the material trough.

[0017] By adopting the above technical solution, the effect of quantitative salt extraction is achieved.

[0018] The present invention is further configured as follows: the sealing assembly includes a sealing plate that is slidably sealed and connected to the inner wall of the discharge port, and a round cover is arranged at the inner center position of the sealing plate, the round cover is slidably connected to the inner wall of the sealing plate and is connected to the top end face of the sealing plate by spring reset, and the round cover is installed directly above the push rod; the top end of the sealing plate is also equipped with a reset spring connected to the bottom wall of the box cover, and the outer side of the reset spring is wrapped with a sealing cloth to prevent salt particles from entering; the top end face of the sealing plate is also equipped with a limit block that is slidably reset and connected to the end face of the sealing plate, and the end of the limit block extends to the top end of the round cover to limit the round cover, a wedge-shaped groove is opened inside the limit block, and a wedge rod that is adapted to the wedge groove and is used to squeeze the wedge groove to move is arranged above the wedge groove, and limiting telescopic rods that assist the movement of the sealing plate are installed on both sides of the end face of the sealing plate.

[0019] By adopting the above technical solution, a sealing effect is achieved on the feed opening.

[0020] The present invention is further configured such that a stirring component for stirring salt particles is installed inside the box body, and the stirring component is composed of a stirring structure and a driving structure, wherein the stirring structure is arranged inside the box body, and the driving structure is arranged below the box body.

[0021] By adopting the above technical solution, the salt particles inside the box body can be stirred.

[0022] The present invention is further configured as follows: the stirring structure includes a stirring blade arranged inside the box body and located on one side of the discharge port, and a rotating shaft for installing and driving the stirring blade to rotate is provided on the inner side of the stirring blade, and the driving structure includes a guide rod arranged below the box body and synchronously connected to the bottom end of the rotating shaft and having a guide groove on the outer wall, and the bottom end of the guide rod extends downward and passes through a driving plate, a through hole for assisting the rotation of the guide rod is provided in the driving plate, and a guide block extending into the guide groove on the outer wall of the guide rod is provided in the inner wall of the through hole, and the guide block is slidably connected to the inner wall of the guide groove.

[0023] By adopting the above technical solution, the effect of assisting the discharge of salt particles is achieved to prevent blockage.

[0024] In summary, the present invention mainly has the following beneficial effects:

[0025] 1. The present invention provides a material taking device, a sealing device and a quantitative spoon. First, salt is added into the box body through the feeding port, and then the feeding port is sealed to ensure the drying of the salt particles inside the box body. Further, a suitable quantitative spoon is selected according to the salt intake standard of the heart failure patient, and the specification parameters of the quantitative spoon are entered into the electronic control system. Then, the salt taking device can be started to take salt. Specifically, the quantitative spoon is first placed in the middle of the placement ring, and then the start button is pressed. The start button will send a signal to the electronic control system, and the electronic control system will then control the operation of the material taking component. When the dosing spoon is moved, the driving motor in the vertical plate will drive the screw rod to rotate, and the screw rod will drive the slider on its outer wall to move after rotating, and the movement of the slider will drive the driving plate to move, so the placement ring on the outer wall of the driving plate will move upward with the driving plate, thereby driving the dosing spoon through the cooperation with the annular flange on the outer wall of the dosing spoon. As the dosing spoon moves, the push rod on the inner side of the dosing spoon will move to contact the round cover at the center position of the bottom of the sealing plate, and squeeze the round cover to move upward. Since the round cover is in a limited position at this time, the round cover will drive the sealing plate upward. The dosing spoon moves to open the feeding port, and the salt particles inside the box body will continuously fall into the feeding slot of the metering spoon through the feeding port, so as to complete the taking of the salt particles. When the top end of the metering spoon moves to fit with the bottom wall of the box body, the metering spoon completes the quantitative taking of salt. In the above process, the limit block will gradually move toward the wedge-shaped rod. When the top end of the metering spoon fits with the bottom wall of the box body, the wedge-shaped rod also happens to cooperate with the wedge-shaped groove to drive the limit block to move and release the limit on the round cover. At this time, the round cover will move on the extrusion line of the top rod, and the sealing plate will Under the action of the reset spring, it quickly resets to complete the sealing of the feeding port and prevent the salt particles from overflowing. Furthermore, the reverse operation of the driving motor will drive the screw rod to run in the reverse direction. At this time, the slider will drive the metering spoon that has completed the material collection to reset downward, and the round cover will also reset under the action of the spring. When the metering spoon is reset to the initial position, the metering spoon can be taken out to complete the quantitative intake of salt, and the display screen will also display the amount of salt taken today, so as to give the user an intuitive and clear intake information, which is convenient for subsequent salt collection.

[0026] 2. The present invention provides a stirring assembly. When the driving plate drives the metering spoon to take materials, the guide block provided on the inner wall of the driving plate will also drive the guide rod to move. Then, with the cooperation of the guide block and the guide groove, the movement of the driving plate will drive the guide rod to rotate. After the guide rod rotates, it will drive the rotating shaft to rotate. The rotating shaft will therefore drive the stirring blades on its outer wall to rotate, thereby achieving stirring of the salt particles near the discharge port, which helps the flow of the salt particles, thereby assisting in salt taking, avoiding the situation where the salt particles block the discharge port, and ensuring the quality of the salt taken. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is the first perspective of the overall structure of the present invention;

[0028] Figure 2 The second perspective of the overall structure of the present invention;

[0029] Figure 3 It is a schematic diagram of the structure of the material taking component and the dosing spoon of the present invention;

[0030] Figure 4 It is a schematic diagram of the internal structure of the box body of the present invention;

[0031] Figure 5 It is a schematic diagram of the sealing assembly structure of the present invention;

[0032] Figure 6 It is a schematic structural diagram of a second embodiment of the present invention;

[0033] Figure 7 It is a schematic diagram of the structure of the driving plate of the present invention.

[0034] In the figure: 1. salt taking device; 101. box body; 102. box cover; 103. display screen; 104. operation button; 105. start button; 106. feeding port; 107. cavity; 2. material taking assembly; 201. vertical plate; 202. screw rod; 203. slider; 204. drive plate; 205. placement ring; 3. quantitative spoon; 31. annular flange; 32. material trough; 33. push rod; 4. sealing assembly; 401. sealing plate; 402. round cover; 403. reset spring; 404. limit telescopic rod; 405. limit block; 406. wedge groove; 407. wedge rod; 5. stirring assembly; 501. guide rod; 502. rotating shaft; 503. stirring blade; 504. through hole; 505. guide block. DETAILED DESCRIPTION

[0035] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0036] The following describes an embodiment of the present invention based on its overall structure.

[0037] Embodiment 1

[0038] like Figure 1-Figure 5As shown, a visualized quantitative salt taking device for heart failure patients comprises a salt taking device 1, wherein the salt taking device 1 comprises a box cover 102 with an electric control system installed inside, and a display screen 103 for displaying and recording salt taking information is installed on the end face of the box cover 102, the salt taking device 1 also comprises a box body 101 sealedly connected to the box cover 102, and a cavity 107 for loading salt is provided inside the box body 101, an operation button 104 for checking and retrieving salt taking information is also provided on the end face of the box cover 102 located on one side of the display screen 103, and a start button 105 for starting the salt taking device 1 is also provided on the outer side of the operation button 104, and a feeding port 106 for adding material is provided on both sides of the end face of the box cover 102.

[0039] See also Figure 2-Figure 3 , a material taking component 2 is provided at the bottom end of the box body 101 to realize automatic salt taking of the salt taking device 1;

[0040] Specifically, the material taking component 2 includes two groups of vertical plates 201 fixedly connected to both sides of the bottom end of the box body 101, and the end faces of the vertical plates 201 are provided with slide grooves, and a screw rod 202 is installed in the slide groove. The end of the screw rod 202 is located inside the vertical plate 201, and a driving motor for driving the screw rod 202 is installed, and the driving motor is electrically connected to the electric control system inside the box cover 102. The outer wall of the screw rod 202 is sleeved with a slider 203 that is adapted to the screw rod 202 and slidably connected to the slide groove, and the outer walls of the two groups of sliders 203 are fixedly connected with a driving plate 204, and a placement ring 205 is fixedly installed between the two groups of driving plates 204, and the inner diameter of the placement ring 205 is larger than the outer diameter of the metering spoon 3.

[0041] The material taking component 2 is also provided with a dosing spoon 3 adapted to the salt taking device 1. The specifications of the dosing spoon 3 can be 1g, 2g and 3g, which can be appropriately selected according to the degree of heart failure of the patient using the dosing spoon. The selected specifications of the dosing spoon 3 need to be entered into the electronic control system of the box cover 102.

[0042] Specifically, an annular flange 31 is fixedly provided on the outer wall of the metering spoon 3, and the outer diameter of the annular flange 31 is larger than the inner diameter of the placement ring 205. A material trough 32 for loading quantitative specification salt is opened inside the metering spoon 3, and an upwardly extending push rod 33 is also installed in the material trough 32.

[0043] See also Figure 4-Figure 5 A feeding port for feeding is provided at the bottom of the box body 101 above the dosing spoon 3, and a sealing component 4 is installed in the feeding port to seal the feeding port;

[0044] Specifically, the sealing assembly 4 includes a sealing plate 401 which is slidably sealed with the inner wall of the feeding port, and a round cover 402 is arranged at the inner center of the sealing plate 401, the round cover 402 is slidably connected with the inner wall of the sealing plate 401 and is connected with the top end face of the sealing plate 401 by spring reset, and the round cover 402 is installed just above the top rod 33, and a reset spring 403 which is connected with the bottom wall of the box cover 102 is also installed at the top of the sealing plate 401, and the outer side of the reset spring 403 is wrapped with a sealing cloth to prevent salt particles from entering. The top end face of the sealing plate 401 is also provided with a limit block 405 which is slidably resetably connected to the end face of the sealing plate 401, and the end of the limit block 405 extends to the top of the round cover 402 to limit the round cover 402. A wedge-shaped groove 406 is provided inside the limit block 405, and a wedge-shaped rod 407 adapted to the wedge-shaped groove 406 and used to squeeze the wedge-shaped groove 406 to move is provided above the wedge-shaped groove 406. Limit telescopic rods 404 for assisting the movement of the sealing plate 401 are installed on both sides of the end face of the sealing plate 401.

[0045] Embodiment 2

[0046] like Figure 6-Figure 7 As shown, this is the second embodiment of the present solution, which further optimizes the salt taking process of the present salt taking device 1 by setting a stirring component 5, so as to prevent the situation that salt particles block the feed port during salt taking, resulting in slow salt taking or even failure to take salt;

[0047] Specifically, a stirring assembly 5 for stirring salt particles is installed inside the box body 101, and the stirring assembly 5 is composed of a stirring structure and a driving structure, wherein the stirring structure is arranged inside the box body 101, and the driving structure is arranged below the box body 101;

[0048] Furthermore, the stirring structure includes a stirring blade 503 arranged inside the box body 101 and located on one side of the discharge port, and a rotating shaft 502 for installing and driving the stirring blade 503 to rotate is arranged on the inner side of the stirring blade 503, and the driving structure includes a guide rod 501 arranged below the box body 101 and synchronously connected to the bottom end of the rotating shaft 502 and having a guide groove on the outer wall, and the bottom end of the guide rod 501 extends downward and passes through the driving plate 204, and a through hole 504 for assisting the rotation of the guide rod 501 is opened in the driving plate 204, and a guide block 505 extending into the guide groove on the outer wall of the guide rod 501 is arranged in the inner wall of the through hole 504, and the guide block 505 is slidably connected to the inner wall of the guide groove.

[0049] The working principle of the first embodiment of the present invention is as follows: first, salt is added into the box body 101 through the feeding port 106, and then the feeding port 106 is sealed to ensure that the salt particles inside the box body are dry. Further, a suitable quantitative spoon 3 is selected according to the salt intake standard of the heart failure patient, and the specification parameters of the quantitative spoon 3 are entered into the electronic control system, and then the salt taking device 1 can be started to take salt;

[0050] Specifically, the metering spoon 3 is first placed in the middle of the placement ring 205, and then the start button 105 is pressed. The start button 105 will send a signal to the electronic control system, and the electronic control system will then control the operation of the material taking component 2. At this time, the driving motor in the vertical plate 201 will drive the screw rod 202 to rotate. After the screw rod 202 rotates, it will drive the slider 203 on its outer wall to move, and the movement of the slider 203 will drive the driving plate 204 to move. Therefore, the placement ring 205 located on the outer wall of the driving plate 204 will move upward with the driving plate 204, thereby realizing the driving of the metering spoon 3 by cooperating with the annular flange 31 on the outer wall of the metering spoon 3;

[0051] As the metering spoon 3 moves, the push rod 33 located inside the metering spoon 3 moves to contact the round cover 402 at the center of the bottom of the sealing plate 401, and squeezes the round cover 402 to move upward. Since the round cover 402 is in a limited position at this time, the round cover 402 drives the sealing plate 401 to move upward, thereby realizing the opening of the discharge port. At this time, the salt particles located inside the box body 101 will continuously fall into the material groove 32 of the metering spoon 3 through the discharge port, thereby completing the collection of the salt particles;

[0052] When the top of the metering spoon 3 moves to fit with the bottom wall of the box body 101, the metering spoon 3 completes the quantitative salt extraction. In the above process, the limit block 405 will gradually move toward the wedge rod 407. When the top of the metering spoon 3 fits with the bottom wall of the box body 101, the wedge rod 407 also happens to cooperate with the wedge groove 406 to drive the limit block 405 to move and release the limit on the round cover 402. At this time, the round cover 402 will move upward under the pressure of the top rod 33, and the sealing plate 401 will quickly reset under the action of the reset spring 403, thereby completing the sealing of the discharge port and preventing the salt particles from overflowing.

[0053] Furthermore, after the material is taken, the electric control system will drive the driving motor to run in the reverse direction, and the reverse operation of the driving motor will drive the screw rod 202 to run in the reverse direction. At this time, the slider 203 will drive the quantitative spoon 3 that has finished taking the material to move downward, and the round cover 402 will also be reset under the action of the spring. When the quantitative spoon 3 is reset to the initial position, the quantitative spoon 3 can be taken out to complete the quantitative intake of salt, and the display screen 103 will also display the amount of salt taken today, so as to provide the user with an intuitive and clear intake information, which is convenient for the subsequent salt taking.

[0054] The working principle of the second embodiment of the present invention is as follows: in the process of the driving plate 204 driving the metering spoon 3 to take materials, the guide block 505 arranged on the inner wall of the driving plate 204 will also drive the guide rod 501 to move, and then under the cooperation of the guide block 505 and the guide groove, the movement of the driving plate 204 will drive the guide rod 501 to rotate, and after the guide rod 501 rotates, it will drive the rotating shaft 502 to rotate, and the rotating shaft 502 will therefore drive the stirring blades 503 on its outer wall to rotate, thereby realizing the stirring of the salt particles near the discharge port, which is helpful for the flow of the salt particles, thereby assisting the salt taking, avoiding the situation where the salt particles block the discharge port, and ensuring the quality of the salt taken.

[0055] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contributions as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A visualized quantitative salt taking device for heart failure patients, comprising a salt taking device (1), wherein the salt taking device (1) comprises a box cover (102) with an electric control system installed inside, and a display screen (103) for displaying and recording salt taking information is installed on the end surface of the box cover (102), characterized in that: The salt-taking device (1) further comprises a box body (101) sealedly connected to a box cover (102), and a cavity (107) for loading salt is provided inside the box body (101), an operation button (104) for checking and retrieving salt-taking information is provided on the end face of the box cover (102) located on one side of the display screen (103), and a start button (105) for starting the salt-taking device (1) is provided on the outer side of the operation button (104), and feeding ports (106) for feeding are provided on both sides of the end face of the box cover (102); A material taking component (2) is provided at the bottom end of the box body (101) to realize automatic salt taking of the salt taking device (1); a metering spoon (3) adapted to the salt taking device (1) is also provided in the material taking component (2); and a material discharge port for material discharge is provided above the metering spoon (3) at the bottom end of the box body (101); and a sealing component (4) is installed in the material discharge port to realize sealing of the material discharge port.

2. The visualized quantitative salt taking device for heart failure patients according to claim 1, characterized in that: The material taking assembly (2) comprises two groups of vertical plates (201) fixedly connected to both sides of the bottom end of the box body (101), and the end faces of the vertical plates (201) are provided with sliding grooves, and a screw rod (202) is installed in the sliding groove. The end of the screw rod (202) is located inside the vertical plates (201), and a driving motor for driving the screw rod (202) is installed inside the vertical plates (201), and the driving motor is electrically connected to the electric control system inside the box cover (102).

3. The visualized quantitative salt taking device for heart failure patients according to claim 2, characterized in that: The outer wall of the screw rod (202) is sleeved with a slider (203) adapted to the screw rod (202) and slidably connected to the slide groove, and the outer walls of the two groups of sliders (203) are fixedly connected with driving plates (204), and a placement ring (205) is fixedly installed between the two groups of driving plates (204), and the inner diameter of the placement ring (205) is larger than the outer diameter of the metering spoon (3).

4. The visualized quantitative salt taking device for heart failure patients according to claim 3, characterized in that: The outer wall of the metering spoon (3) is fixedly provided with an annular flange (31), and the outer diameter of the annular flange (31) is larger than the inner diameter of the placement ring (205). The inside of the metering spoon (3) is provided with a material trough (32) for loading quantitative specification salt, and a push rod (33) extending upward is also installed in the material trough (32).

5. The visualized quantitative salt taking device for heart failure patients according to claim 4, characterized in that: The sealing assembly (4) includes a sealing plate (401) which is slidably sealed to the inner wall of the discharge port, and a round cover (402) is provided at the inner center of the sealing plate (401), the round cover (402) is slidably connected to the inner wall of the sealing plate (401) and is connected to the top end surface of the sealing plate (401) through a spring return, and the round cover (402) is installed directly above the push rod (33). A return spring (403) connected to the bottom wall of the box cover (102) is also installed at the top of the sealing plate (401), and the outer side of the return spring (403) is wrapped with a sealing cloth to prevent salt particles from entering.

6. The visualized quantitative salt taking device for heart failure patients according to claim 5, characterized in that: The top end surface of the sealing plate (401) is also provided with a limit block (405) connected to the end surface of the sealing plate (401) for sliding reset, and the end of the limit block (405) extends to the top end of the round cover (402) to limit the round cover (402), a wedge-shaped groove (406) is provided inside the limit block (405), and a wedge-shaped rod (407) adapted to the wedge-shaped groove (406) and used for squeezing the wedge-shaped groove (406) to move is provided above the wedge-shaped groove (406), and both sides of the end surface of the sealing plate (401) are installed with limit telescopic rods (404) for assisting the movement of the sealing plate (401).

7. The visualized quantitative salt taking device for heart failure patients according to claim 1, characterized in that: A stirring assembly (5) for stirring salt particles is also installed inside the box body (101), and the stirring assembly (5) is composed of a stirring structure and a driving structure, wherein the stirring structure is arranged inside the box body (101), and the driving structure is arranged below the box body (101).

8. The visualized quantitative salt taking device for heart failure patients according to claim 7, characterized in that: The stirring structure comprises a stirring blade (503) arranged inside the box body (101) and located on one side of the feeding port, and a rotating shaft (502) for mounting and driving the stirring blade (503) to rotate is arranged inside the stirring blade (503).

9. The visualized quantitative salt taking device for heart failure patients according to claim 7, characterized in that: The driving structure comprises a guide rod (501) which is arranged below the box body (101) and synchronously connected to the bottom end of the rotating shaft (502) and has a guide groove on its outer wall, and the bottom end of the guide rod (501) extends downward and passes through the driving plate (204), a through hole (504) for assisting the guide rod (501) in rotating is provided in the driving plate (204), and a guide block (505) extending to the guide groove on the outer wall of the guide rod (501) is provided in the inner wall of the through hole (504), and the guide block (505) is slidably connected to the inner wall of the guide groove.

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