A discharging mechanism of an outpatient body fluid collection self-service machine

Abstract

The application provides a discharging mechanism of an outpatient body fluid collection self-service machine, and belongs to the technical field of medical instruments, which comprises a storage box, a storage bin for storing body fluid test tubes is arranged on the storage box, and a feeding port and a discharging port are arranged on the storage bin; a discharging structure is installed on the storage box and located at the discharging port, wherein the discharging structure comprises a discharging motor, and a speed reducer is connected to the output end of the discharging motor; a discharging wheel is connected to the lower side of the discharging port through a rotating shaft, and the speed reducer and the rotating shaft are connected through a transmission structure, wherein an eccentric structure is connected to the rotating shaft, one end of the eccentric structure extends into the storage bin, and through the rotation of the rotating shaft, the end of the eccentric structure extending into the storage bin strikes the body fluid test tube in the storage bin. The application sets the eccentric structure to remove the friction between the body fluid test tube and the inner wall of the storage bin in the form of striking, so that the body fluid test tube falls and is smoothly discharged.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of medical devices, and relates to a discharging mechanism, in particular to a discharging mechanism of a self-service machine for collecting outpatient body fluid. BACKGROUND

[0002] At present, the process of hospital outpatient body fluid examination is as follows: a patient goes to an examination window with an examination sheet, a staff member selects a container according to a doctor's order and gives a leave-taking requirement, the patient takes a sample and then goes to the window again, the staff member receives the sample, prints a bar code on the container and prints a receipt for the patient, and informs the patient of the time and place of taking the sheet. The following problems exist: 1. long queues and long waiting time during peak hours; 2. various errors such as insufficient sample collection and wrong container caused by various reasons; 3. large workload, and easy occurrence of errors such as mistaken identity; and 4. when receiving the sample, the patient's medical card needs to be taken to print a bar code and paste it on the container, and a receipt needs to be printed for the patient at the same time, and there is a possibility of hospital infection due to biological hazards of the sample, and patients often complain.

[0003] Chinese patent (CN20797303U) discloses a discharging mechanism of a body fluid test tube, which comprises a base plate, one side of the base plate is movably connected with a storage box for storing body fluid test tubes, and the other side of the base plate is detachably connected with a distribution assembly, wherein a discharging passage of the body fluid test tube is arranged between the storage box and the distribution assembly.

[0004] The above-mentioned discharging mechanism cannot cause the body fluid test tube to descend due to its own gravity when the volume of the body fluid test tube is large (the contact area between the two ends of the body fluid test tube and the inner wall of the storage box is large), and the weight is light, and thus the body fluid test tube cannot be smoothly discharged due to the jamming phenomenon. SUMMARY

[0005] The application aims to solve the above-mentioned problems of the prior art, and provides a discharging mechanism which facilitates smooth discharge of a body fluid test tube.

[0006] The purpose of the application can be achieved by the following technical scheme: a discharging mechanism of a self-service machine for collecting outpatient body fluid, comprising:

[0007] a storage box, a storage bin for storing body fluid test tubes is arranged on the storage box, and a feeding port and a discharging port are arranged on the storage bin;

[0008] The discharge structure is installed on the storage bin and located at the discharge port. The discharge structure includes a discharge motor, and the output end of the discharge motor is connected to a reducer. The discharge wheel is connected to the lower part of the discharge port via a rotating shaft, and the reducer and the rotating shaft are connected via a transmission structure. An eccentric structure is connected to the rotating shaft, and one end of the eccentric structure extends into the storage bin. By rotating the rotating shaft, the end of the eccentric structure extending into the storage bin is driven to strike the body fluid test tube in the storage bin, thereby relieving the contact between the body fluid test tube and the inner wall of the storage bin.

[0009] In the above-mentioned dispensing mechanism of a self-service outpatient body fluid collection machine, the eccentric structure includes a rocker plate connected to a rotating shaft, a rocker arm connected to the rocker plate, and a rocking plate connected to the rocker arm. The rocking plate is located in the storage bin, and the rocker plate and the rocker arm, as well as the rocker arm and the rocking plate, are pivotally connected. The rocker plate and the rotating shaft are coaxially arranged and rotate synchronously, and the rocker arm is eccentrically connected to the rocker plate.

[0010] In the dispensing mechanism of the above-mentioned outpatient body fluid collection self-service machine, an arc-shaped groove is provided on the storage bin, and the arc-shaped groove is engaged with the end of the rocker arm connected to the rocker plate. The arc-shaped groove serves as the trajectory shape of the rocker arm during movement, and the highest and lowest points of the end of the rocker plate connected to the rocker arm are located at the two ends of the arc-shaped groove, respectively. The highest and lowest points of the rocker plate are both located in the vertical plane where the dispensing port is located.

[0011] In the above-mentioned outpatient body fluid collection self-service machine's dispensing mechanism, the inlet and outlet are located in the same vertical direction, and a movable door is provided at the inlet. The opening of the inlet is changed by moving the movable door. As the number of body fluid test tubes in the storage bin increases, the movable door blocks the body fluid test tubes in the horizontal direction.

[0012] In the above-mentioned outpatient body fluid collection self-service machine's dispensing mechanism, the inlet includes a fixed inlet with a fixed opening and a variable inlet with a variable opening, and the fixed inlet and the variable inlet are interconnected. A movable door is installed at the variable inlet. As the number of body fluid test tubes in the storage bin increases, the opening of the variable inlet is reduced by moving the movable door until the variable inlet is sealed.

[0013] In the above-mentioned outpatient body fluid collection self-service machine's dispensing mechanism, the plane where the opening end of the fixed inlet is located is set as an inclined plane, and the plane where the opening end of the variable inlet is located is set as a plane. The fixed inlet is moved vertically by the movable door plate, and the diameter of the end of the fixed inlet away from the variable inlet is larger than the diameter of the end connected to the variable inlet.

[0014] In the above-mentioned outpatient body fluid collection self-service machine's dispensing mechanism, the fixed inlet extends from the end away from the variable inlet to the end connected to the variable inlet, with its diameter gradually decreasing. One side wall of the fixed inlet is integrally formed, while the other side wall of the fixed inlet is separately formed and connected by a connecting wall.

[0015] In the above-mentioned dispensing mechanism of a self-service outpatient body fluid collection machine, the side wall of the fixed inlet is integrally formed with the side wall of the storage bin, and the side wall of the fixed inlet is separately formed with the side wall of the storage bin. The side wall of the fixed inlet that is separately formed includes a first side wall, a second side wall, and a connecting wall connecting the first side wall, the second side wall, and the side wall of the storage bin.

[0016] In the dispensing mechanism of the above-mentioned outpatient body fluid collection self-service machine, slide rails are installed on both sides of the variable feed port, and sliders that slide and cooperate with the slide rails are installed on the movable door plate. A front baffle is provided on the variable feed port, and a fixing part for locking the current opening degree of the variable feed port is provided between the front baffle and the movable door plate.

[0017] In the dispensing mechanism of the above-mentioned outpatient body fluid collection self-service machine, the fixing part is fixed to the movable door panel by magnetic attraction, and the fixing part includes a first magnet disposed on the front baffle and a second magnet disposed on the movable door panel. There are multiple first magnets, which are installed on the front baffle along the moving direction of the movable door panel; or there are multiple second magnets, which are installed on the movable door panel along the moving direction of the movable door panel.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] (1) The present invention provides a dispensing mechanism for a self-service outpatient body fluid collection machine. By setting an eccentric structure, the friction between the body fluid test tube and the inner wall of the storage bin is relieved by striking, so as to realize the falling of the body fluid test tube and smooth dispensing.

[0020] (2) By moving the movable door panel, the opening of the feed inlet can be changed, which makes it easier for medical staff to load materials, improves work efficiency, and reduces the labor intensity of hospital staff.

[0021] (3) The fixed feed port is set as a variable diameter structure, and the diameter of the fixed feed port that is far away from the variable feed port is larger, while the diameter of the fixed feed port that is connected to the variable feed port is smaller. This setting is to make it easier for the user to put their arm into the fixed feed port, thereby facilitating the loading of the body fluid test tube.

[0022] (4) By inserting identification signs, medical staff can quickly know what kind of body fluid test tubes need to be loaded into the current storage bin, thereby improving the efficiency of body fluid test tube loading. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the dispensing mechanism of a self-service outpatient body fluid collection machine according to the present invention.

[0024] Figure 2 yes Figure 1 The diagram shows a partial structural schematic of the discharge mechanism.

[0025] Figure 3 yes Figure 2 The diagram shows a partial structural schematic of the discharge mechanism.

[0026] Figure 4 yes Figure 3 A structural diagram from another perspective.

[0027] Figure 5 yes Figure 4 The sectional view AA shown.

[0028] Figure 6 yes Figure 5 Enlarged view of part A in the middle.

[0029] Figure 7 This is a diagram showing the dispensing mechanism of a self-service outpatient body fluid collection machine according to the present invention in use on the self-service outpatient body fluid collection machine.

[0030] In the diagram, 100 is a storage bin; 110 is a storage hopper; 111 is a discharge port; 112 is an arc-shaped groove; 113 is a fixed feed inlet; 114 is a variable feed inlet; 115 is a connecting wall; 116 is a first side wall; 117 is a second side wall; 120 is a sensor; 130 is a movable door panel; 131 is a slide rail; 132 is a slider; 133 is a second magnet; 134 is a second groove; 140 is a front baffle; 14 1. First magnet; 142. First groove; 150. Identification plate; 160. Identification sign; 170. Moving block; 171. Pin hole; 180. Guide rail; 190. Bracket; 200. Discharge structure; 210. Discharge motor; 220. Reducer; 230. Discharge wheel; 231. Receiving groove; 240. Rotating shaft; 250. Eccentric structure; 251. Rocking plate; 252. Rocker arm; 253. Swing plate. Detailed Implementation

[0031] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings to further illustrate the technical solutions of the present invention. However, the present invention is not limited to these embodiments.

[0032] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0033] like Figures 1 to 7 As shown, the present invention provides a dispensing mechanism for a self-service outpatient body fluid collection machine, comprising:

[0034] The storage box 100 is provided with a storage compartment 110 for storing body fluid test tubes, and the storage compartment 110 is provided with an inlet and an outlet 111.

[0035] The discharge structure 200 is installed on the storage bin 100 and located at the discharge port 111. The discharge structure 200 includes a discharge motor 210, and the output end of the discharge motor 210 is connected to a reducer 220. The discharge wheel 230 is connected to the lower part of the discharge port 111 via a rotating shaft 240. The reducer 220 and the rotating shaft 240 are connected via a transmission structure (not shown in the figure). An eccentric structure 250 is connected to the rotating shaft 240, and one end of the eccentric structure 250 extends into the storage bin 110. By rotating the rotating shaft 240, the end of the eccentric structure 250 extending into the storage bin 110 is driven to strike the body fluid test tube in the storage bin 110, thereby relieving the contact between the body fluid test tube and the inner wall of the storage bin 110 and realizing the smooth discharge of the body fluid test tube.

[0036] It is worth mentioning that the discharge wheel 230 is equipped with a receiving groove 231.

[0037] The present invention provides a dispensing mechanism for a self-service outpatient body fluid collection machine. By setting an eccentric structure 250, the friction between the body fluid test tube and the inner wall of the storage bin 110 is relieved by striking, so as to realize the falling of the body fluid test tube and smooth dispensing.

[0038] Preferably, the eccentric structure 250 includes a rocker plate 251 connected to the rotating shaft 240, and a rocker arm 252 is connected to the rocker plate 251, and a rocker plate 253 is connected to the rocker arm 252. The rocker plate 253 is located inside the storage bin 110, and the rocker plate 251 and the rocker arm 252, as well as the rocker arm 252 and the rocker plate 253, are pivotally connected.

[0039] It is worth mentioning that the rocker plate 251 is coaxially arranged with the rotating shaft 240 and rotates synchronously. The rocker arm 252 is eccentrically connected to the rocker plate 251. One end of the rocker plate 253 is connected to the rocker arm 252, and the other end of the rocker plate 253 is connected to the side wall of the storage bin 110.

[0040] When the rotating shaft 240 drives the rocker plate 251 to rotate, the rocker arm 252 drives the end of the rocker plate 253 connected to the rocker arm 252 to move up and down, and the end of the rocker plate 253 away from the rocker arm 252 rotates, thereby realizing the impact on the body fluid test tube in the storage bin 110.

[0041] More preferably, the storage bin 110 is provided with an arc-shaped groove 112, and the arc-shaped groove 112 is engaged with one end of the rocker arm 252 that is connected to the rocker plate 253, wherein the arc-shaped groove 112 serves as the trajectory shape of the rocker arm 252 when it moves.

[0042] More preferably, the highest and lowest points of the end of the sway plate 253 connected to the rocker arm 252 are located at the two ends of the arc-shaped groove 112, wherein the highest and lowest points of the sway plate 253 are both located in the vertical plane where the discharge port 111 is located.

[0043] In this embodiment, the end of the rocker plate 253 connected to the rocker arm 252 is always located in the vertical plane where the discharge port 111 is located, thereby further ensuring the smooth discharge of the body fluid test tube.

[0044] Preferably, a sensor 120 is provided on the discharge port 111 to detect the minimum content of body fluid test tubes in the storage bin 110, so that medical staff can replenish the body fluid test tubes in the storage bin 110 in a timely manner.

[0045] Preferably, the inlet and outlet 111 are located in the same vertical direction, and a movable door 130 is provided at the inlet. The opening of the inlet is changed by moving the movable door 130. As the number of body fluid test tubes in the storage bin 110 increases, the opening of the outlet 111 gradually decreases. The movable door 130 blocks the body fluid test tubes in the horizontal direction.

[0046] In this embodiment, by moving the movable door panel 130, the opening of the feed inlet is changed, thereby facilitating the loading of materials by medical staff, improving work efficiency, and reducing the labor intensity of hospital staff.

[0047] More preferably, the feed inlet includes a fixed feed inlet 113 with a fixed opening and a variable feed inlet 114 with a variable opening, and the fixed feed inlet 113 and the variable feed inlet 114 are interconnected. A movable door plate 130 is installed on the variable feed inlet 114. By moving the movable door plate 130, the opening of the variable feed inlet 114 is changed, thereby changing the overall opening of the fixed feed inlet 113 and the variable feed inlet 114.

[0048] It is worth mentioning that when the overall opening of the fixed feed port 113 and the variable feed port 114 is opened to the maximum, the user's arm can be inserted from the fixed feed port 113 and then slowly moved down into the variable feed port 114. Finally, the body fluid test tube is placed into the storage bin 110. As the number of body fluid test tubes stacked in the storage bin 110 increases, the movable door plate 130 can be moved in the direction of reducing the opening of the variable feed port 114 until the variable feed port 114 is completely sealed, and the loading of the body fluid test tube is finally completed.

[0049] More preferably, the plane where the opening end of the fixed feed inlet 113 is located is set as an inclined plane, and the plane where the opening end of the variable feed inlet 114 is located is set as a plane, wherein the opening degree of the variable feed inlet 114 is changed by moving the movable door plate 130 in the vertical direction.

[0050] Preferably, the fixed feed inlet 113 extends from one end away from the variable feed inlet 114 to the end connected to the variable feed inlet 114, and its diameter gradually decreases. One side wall of the fixed feed inlet 113 is integrally formed, and the other side wall of the fixed feed inlet 113 is separately formed and connected by a connecting wall 115.

[0051] In this embodiment, the fixed feed port 113 is configured as a variable diameter structure, with the diameter of the fixed feed port 113 that is far from the variable feed port 114 being larger, and the diameter of the fixed feed port 113 that is connected to the variable feed port 114 being smaller. This configuration is to facilitate the user to insert their arm into the fixed feed port 113, thereby facilitating the loading of the body fluid test tube.

[0052] More preferably, the side wall of the fixed feed inlet 113 is integrally formed with the side wall of the storage bin 110, and the side wall of the fixed feed inlet 113 is separately formed with the side wall of the storage bin 110. The side wall of the fixed feed inlet 113 that is separately formed includes a first side wall 116, a second side wall 117, and a connecting wall 115 that connects the first side wall 116, the second side wall 117, and the side wall of the storage bin 110.

[0053] It is worth mentioning that the first sidewall 116 is set vertically, while the second sidewall 117 is set at an angle.

[0054] Preferably, slide rails 131 are installed on both sides of the variable feed port 114, and sliders 132 that slide in contact with the slide rails 131 are installed on the movable door panel 130. A front baffle 140 is provided on the variable feed port 114, and a fixing part for locking the current opening degree of the variable feed port 114 is provided between the front baffle 140 and the movable door panel 130.

[0055] More preferably, the fixing part achieves the fixing of the movable door panel 130 through magnetic attraction, wherein the fixing part includes a first magnet 141 disposed on the front baffle 140 and a second magnet 133 disposed on the movable door panel 130.

[0056] It is worth mentioning that there are multiple first magnets 141 and a single second magnet 133. Multiple first magnets 141 are mounted on the front baffle 140 along the moving direction of the movable door panel 130. Alternatively, there is a single first magnet 141 and multiple second magnets 133, with multiple second magnets 133 mounted on the movable door panel 130 along the moving direction of the movable door panel 130. Or, there are multiple first magnets 141 and multiple second magnets 133, with the first magnets 141 and second magnets 133 respectively positioned on the front baffle 140 and the movable door panel 130 along the moving direction of the movable door panel 130.

[0057] In addition, to ensure the smooth movement of the movable door panel 130, a first groove 142 and a second groove 134 are provided on the front baffle 140 and the movable door panel 130, respectively. The first groove 142 and the second groove 134 serve as the installation positions for the first magnet 141 and the second magnet 133, respectively, and the first magnet 141 and the second magnet 133 are installed on the bottom of the first groove 142 and the bottom of the second groove 134 by fasteners.

[0058] It is worth mentioning that the first groove 142 and the second groove 134 are arranged in a strip shape, and the first magnet 141 and the second magnet 133 are also arranged in a strip shape. The movable door panel 130 fits against the front baffle 140 during the movement.

[0059] Preferably, an identification plate 150 is connected to the movable door panel 130, wherein a space for a useful insertable identification plate 160 is provided between the movable door panel 130 and the identification plate 150. Through the insertable identification plate 160, medical staff can quickly know what kind of body fluid test tubes need to be loaded into the current storage bin 110, thereby improving the efficiency of body fluid test tube loading.

[0060] Preferably, movable blocks 170 are connected to both sides of the storage bin 110 near the discharge port 111, and the movable blocks 170 slide in cooperation with the guide rail 180. The guide rail 180 is connected by a bracket 190 connected to the outpatient body fluid collection self-service machine, and a pin structure is provided between one set of movable blocks 170 and the corresponding guide rail 180.

[0061] It is worth mentioning that the latch structure includes latch holes 171 on both the moving block 170 and the guide rail 180. When the dispensing mechanism moves into position, a latch is inserted into the latch hole 171 to lock the dispensing mechanism on the door of the self-service liquid dispenser. The sliding engagement between the moving block 170 and the guide rail 180 facilitates the disassembly, installation, and loading of the dispensing mechanism.

[0062] It should be noted that in this invention, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly specified. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0063] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0064] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A discharge mechanism of an outpatient body fluid collection self-service machine, characterized in that, The utility model relates to a kind of body fluid test tube feeding device, including: Storage box is provided with storage bin to store body fluid test tube, and inlet and outlet are provided on storage bin; Discharge structure is installed on storage box and located in discharge port, wherein the discharge structure includes discharge motor, and the output end of discharge motor is connected with speed reducer;Discharge wheel is connected below discharge port by rotating shaft, and speed reducer is connected with rotating shaft by transmission structure, wherein eccentric structure is connected on rotating shaft, and one end of the eccentric structure extends into storage bin, and the one end of eccentric structure extending into storage bin is driven by rotating shaft to hit body fluid test tube in storage bin, to remove the abutment between body fluid test tube and inner wall of storage bin; Inlet and outlet are located in the same vertical direction, and movable door plate is provided at inlet, the opening of inlet is changed by the movement of movable door plate, and the number of body fluid test tube in storage bin is continuously increased, movable door plate is moved to block body fluid test tube in horizontal direction; Eccentric structure includes rocker connected with rotating shaft, and rocker arm is connected on rocker, and swing plate is connected on rocker arm, wherein swing plate is located in storage bin, and rocker and rocker arm are pivotally connected, and rocker arm is eccentrically connected to rocker; Arc-shaped groove is provided on storage bin, and the arc-shaped groove is connected with one end of rocker arm connected with swing plate, wherein the arc-shaped groove is used as the track shape of rocker arm movement, and the highest point and the lowest point of one end of swing plate connected with rocker arm are located at both ends of arc-shaped groove, and the highest point and the lowest point of swing plate are located in the vertical plane of discharge port; Rocker and rotating shaft are coaxially arranged and synchronously rotated, and rocker arm is eccentrically connected to rocker, wherein one end of swing plate is connected with rocker arm, and the other end of swing plate is connected with the side wall of storage bin; When rotating shaft drives rocker to rotate, one end of swing plate connected with rocker arm is up and down by rocker arm, and the other end of swing plate away from rocker arm rotates.

2. The discharging mechanism of the outpatient body fluid collection self-service machine according to claim 1, characterized in that, Inlet includes fixed inlet with fixed opening and variable inlet with variable opening, and fixed inlet and variable inlet are connected with each other, wherein movable door plate is installed on variable inlet, and the opening of variable inlet is reduced by the movement of movable door plate as the number of body fluid test tube in storage bin is continuously increased, until the variable inlet is closed.

3. The discharging mechanism of the outpatient body fluid collection self-service machine according to claim 2, characterized in that, The plane of opening end of fixed inlet is inclined, and the plane of opening end of variable inlet is flat, wherein the movable door plate moves in vertical direction, and the diameter of one end of fixed inlet away from variable inlet is larger than the diameter of the other end connected with variable inlet.

4. The discharging mechanism of the outpatient body fluid collection self-service machine according to claim 3, characterized in that, The diameter of fixed inlet gradually decreases from one end away from variable inlet to the other end connected with variable inlet, wherein one side wall of fixed inlet is integrally arranged, and the other side wall of fixed inlet is dividedly arranged and connected by connecting wall.

5. The discharging mechanism of the outpatient body fluid collection self-service machine according to claim 4, characterized in that, The side wall integrally arranged in the fixed feeding port is integrally arranged with the side wall of the storage bin, and the side wall separately arranged in the fixed feeding port is separately arranged with the side wall of the storage bin, wherein the side wall separately arranged in the fixed feeding port comprises a first side wall, a second side wall and a connecting wall connecting the first side wall, the second side wall and the side wall of the storage bin.

6. The discharging mechanism of the outpatient body fluid collection self-service machine according to claim 2, characterized in that, The variable feeding port is provided with a front baffle, and a fixing part for locking the current opening degree of the variable feeding port is arranged between the front baffle and the movable door plate.

7. The discharging mechanism of the outpatient body fluid collection self-service machine according to claim 6, characterized in that, The fixing part realizes the fixation of the movable door plate through magnetic attraction cooperation, and comprises a first magnet arranged on the front baffle and a second magnet arranged on the movable door plate in correspondence, wherein the number of the first magnets is multiple and arranged on the front baffle along the moving direction of the movable door plate, or the number of the second magnets is multiple and arranged on the movable door plate along the moving direction of the movable door plate.

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