Automatic rotary conveying structure for composite rod products

Abstract

The invention relates to an automatic rotary conveying structure for composite material rod products, which is applied to the field of conveying and carrying, and can drive the rod-shaped products to automatically rotate in the conveying process by utilizing a conveying chain and a rotary seat, so that the rod-shaped products can be comprehensively detected in the subsequent detection process, and the rod-shaped products can be continuously conveyed in the inclined conveying process under the cooperation of a tilting rod and an electromagnetic arc ring. The supporting wheel rod at the lower position and the tilting rod end protruding and tilting on the surface of the supporting wheel rod play a role in intercepting the rod-shaped products, the other supporting wheel rod can normally and continuously drive the rod-shaped products to rotate so as to prevent the rod-shaped products from rolling down during inclined conveying, and in addition, aiming at the problem that the intercepting effect of the protruding intercepting part of the tilting rod with the large diameter of the rod-shaped products is limited, the supporting wheel rod can be used for supporting the rod-shaped products. And targeted adjustment can be carried out by utilizing the standby interception belt.

Description

Technical Field

[0001] The invention relates to an automatic rotating conveying structure, in particular to an automatic rotating conveying structure for composite material rod products used in the field of conveying and handling. Background Art

[0002] Rod-shaped products made of composite materials require a conveying device to transport and transfer the produced rod-shaped products during the production process, which saves manpower and achieves the goal of modern intelligent production.

[0003] The specification of Chinese invention patent CN114630792B discloses a method for conveying stick packages and a conveying station for stick packages, which can convey the stick packages from the outlet of a packaging machine to a conveyor device that continuously operates to supply a case packing machine, and a conveying station for stick packages in an efficient and immediate manner, without resorting to the use of a robotic arm device for picking up and conveying, thereby reducing the volume.

[0004] When conveying rod-shaped objects, the existing conveying structure can only achieve static conveyance of the rod body, and the rod body cannot be flipped on the surface of the conveying structure. When it passes through the inspection area later, only part of the surface of the rod body can be viewed, and comprehensive inspection of the rod body cannot be achieved. Therefore, a conveying structure that can drive the rod body to rotate is needed to improve such problems. Summary of the invention

[0005] In view of the above prior art, the technical problem to be solved by the present invention is how to provide a conveying structure that takes into account both conveying and rotation, so that the rod-shaped objects can be rotated when conveying them so that the rod-shaped objects can be fully inspected and processed when passing through the inspection area.

[0006] To solve the above problems, the present invention provides an automatic rotating conveying structure for composite rod products, comprising four sprockets, the surfaces of the sprockets are provided with arc-shaped notches, the outer surfaces of the sprockets are transmission-connected with a conveyor belt, the outer side of the conveyor belt is arranged with a conveyor chain, the conveyor belt consists of a moving wheel and a belt body, the top of the belt body is provided with a bracket and a rotating seat arranged at intervals, the top of the bracket is provided with a lifting gear meshing with the conveyor chain through a bearing, the rotating seat comprises two shaft seats, the inner part of the shaft seat is rotatably connected with a supporting wheel rod, one side of the supporting wheel rod is connected with a movable rod with a diameter smaller than the supporting wheel rod, a shaft sleeve is arranged on the outer side of the movable rod, the outer side of the shaft sleeve is fixedly connected with a rotating gear meshing with the conveyor chain, and the cross-sectional width value of the shaft sleeve is smaller than the cross-sectional width value of the rotating gear, a tilting rod is installed inside the supporting wheel rod through the shaft frame, and one end of the tilting rod extends to the inside of the movable rod, the surfaces of the movable rod and the tilting rod are provided with holes corresponding to the ends of the tilting rod, the inner wall of the supporting wheel rod is provided with symmetrically arranged electromagnetic arc rings, and the position of the surface of the tilting rod corresponding to the electromagnetic arc ring is coated with a magnetic layer.

[0007] In the above-mentioned automatic rotating conveying structure for composite rod products, the conveying chain and the rotating seat can be used to drive the rod-shaped products to rotate automatically during the conveying process. The roller rod can also be used to prevent the rod-shaped products from rolling down during inclined conveying.

[0008] As a further improvement of the present application, a plurality of arc-shaped notches are provided on the surface of the sprocket, and the curvature radius of the moving wheel is the same as the curvature radius of the arc-shaped notches, and the distance between the two moving wheels of the belt body is the same as the arc length distance between the two arc-shaped notches.

[0009] As a further improvement of the present application, an inclination sensor is installed inside the shaft seat to detect the inclination degree of the rotating seat, and the inclination sensor is connected to the electromagnetic arc ring signal.

[0010] As a further improvement of the present application, the diameter of the hole is larger than the diameter of the end of the tilting rod, and the surface of the sleeve close to the movable rod is provided with an insertion interface corresponding to the inner end of the tilting rod located on the movable rod, and the shaft frame is located in the support wheel rod close to the movable rod.

[0011] As a further improvement of the present application, a plurality of gear rings located outside the sprocket are arranged on the inner side of the conveyor chain, and the gear rings are meshingly connected to the conveyor chain. A sprocket motor is installed on the surface of the centrally arranged gear ring, and the two gear rings located on the same axis are connected by a long rod. The gear ring coaxial with the output end of the drive motor is located on the outer periphery of the drive motor, and the gear ring is rotatably connected to the surface of the drive motor.

[0012] As a further improvement of the present application, it also includes a conveying control system, which includes a state monitoring module and an interception execution module, wherein the state monitoring module is connected to the inclination sensor signal, and is used to check the inclination state of the conveyor belt and select to adjust the start-up state of the electromagnetic arc ring in the two roller rods in the rotating seat, and the interception execution module is connected to the electromagnetic arc ring signal, and is used to adjust the state of the two roller rods in the rotating seat.

[0013] As another improvement of the present application, an annular defect is provided on the surface of the support wheel rod in the middle of the two holes, a spare interception belt is wrapped around the surface of the annular defect, the spare interception belt includes an electrovariable belt filled with an electrovariable hardening colloid, an electromagnetic buckle is connected to the tail end of the electrovariable belt, a memory belt is connected to the surface of the electric variable belt away from the annular defect, and a soft magnetic tape that attracts the electromagnetic buckle is installed on the surface of the memory belt away from the electric variable belt.

[0014] As another improvement supplement of the present application, there is an angle between the connection position of the spare interception belt and the annular defect and the hole in the cross-section of the support roller rod, the memory belt is made of memory metal springs, and the curvature radius of the memory belt in the natural state is more than twice the radius of the support roller rod.

[0015] As another improvement supplement of the present application, the magnetic attraction force between the electromagnetic buckle and the soft magnetic tape is greater than the elastic force of the memory tape itself.

[0016] To summarize, by utilizing the conveyor chain and the rotating seat, the rod-shaped products can be driven to rotate automatically during the conveying process, so as to facilitate the comprehensive inspection of the rod-shaped products during subsequent inspections. With the cooperation of the tilting rod and the electromagnetic arc ring, during inclined conveying, the lower support roller rod and the protruding and raised tilting rod end on its surface can be utilized to intercept the rod-shaped products, while the other support roller rod can continue to drive the rod-shaped products to rotate normally, so as to prevent the rod-shaped products from rolling down during inclined conveying. In addition, in view of the problem that the interception effect of the protruding interception part of the tilting rod is limited due to the large diameter of the rod-shaped products, a spare interception belt can be used for targeted adjustments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the first implementation method of the present application; Figure 2 This is a schematic diagram of the installation of the conveyor chain and sprocket of the first embodiment of the present application; Figure 3 This is a front view of the first embodiment of the present application; Figure 4 For this application Figure 3 A is an enlarged schematic diagram; Figure 5 This is a structural diagram of a rotating seat according to a first embodiment of the present application; Figure 6 This is a diagram showing the internal structure of the supporting wheel rod according to the first embodiment of the present application; Figure 7 This is a state diagram of the tilting lever when the supporting wheel lever of the first embodiment of the present application rotates synchronously with the rotating gear; Figure 8 This is a state diagram of the tilting lever when the supporting wheel lever of the first embodiment of the present application does not rotate synchronously with the rotating gear; Fig. 9 This is a diagram showing the rotation state of the rod-shaped product and the supporting wheel rod during the inclined transportation process of the rod-shaped product according to the first embodiment of the present application; Fig.10 This is a diagram showing the rotation state of the rod-shaped product and the supporting wheel rod during the horizontal transportation of the rod-shaped product according to the first embodiment of the present application; Fig.11 This is a state diagram of the second embodiment of the present application in which the tilting rod interception effect is limited when the rod-shaped product has a larger diameter; Fig.12 This is a structural diagram of a backup interception belt according to a second embodiment of the present application; Fig.13 This is a composition diagram of the backup interception belt of the second embodiment of the present application; Fig.14 This is a usage status diagram of the spare interception belt of the second embodiment of the present application.

[0018] Description of the numbers in the figure: 1. Driving motor; 101. Sprocket motor; 102. Gear ring; 2. Conveyor belt; 21. Moving wheel; 22. Lifting gear; 3. Conveyor chain; 4. Sprocket; 5. Rotating seat; 51. Rotating gear; 52. Supporting wheel rod; 53. Crank rod; 54. Electromagnetic arc ring; 521. Movable rod; 6. Bushing; 7. Spare intercepting belt; 71. Electric variable belt; 72. Memory belt; 73. Electromagnetic buckle. DETAILED DESCRIPTION

[0019] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0020] The first implementation method: Figure 1-6 The automatic rotating conveying structure of composite rod products is shown, including four sprocket wheels 4, the surface of the sprocket wheels 4 is provided with an arc-shaped notch, the outer surface of the sprocket wheels 4 is drivingly connected to the conveyor belt 2, the outer side of the conveyor belt 2 is arranged with a conveyor chain 3, the conveyor belt 2 is composed of a moving wheel 21 and a belt body, the top of the belt body is installed with spaced brackets and a rotating seat 5, the top of the bracket is installed with a lifting gear 22 meshing with the conveyor chain 3 through a bearing, the rotating seat 5 includes two shaft seats, the inner part of the shaft seat is rotatably connected to a supporting wheel rod 52, and one side of the supporting wheel rod 52 is connected to a movable rod 52 with a diameter smaller than the supporting wheel rod 52 1. A shaft sleeve 6 is arranged on the outer side of the movable rod 521, and a rotating gear 51 meshing with the conveying chain 3 is fixedly connected to the outer side of the shaft sleeve 6, and the cross-sectional width value of the shaft sleeve 6 is smaller than the cross-sectional width value of the rotating gear 51. A tilting rod 53 is installed inside the supporting wheel rod 52 through the shaft frame, and one end of the tilting rod 53 extends to the inside of the movable rod 521. The surfaces of the movable rod 521 and the tilting rod 53 are both provided with holes corresponding to the ends of the tilting rod 53. The inner wall of the supporting wheel rod 52 is installed with symmetrically arranged electromagnetic arc rings 54, and the surface of the tilting rod 53 corresponding to the electromagnetic arc ring 54 is coated with a magnetic layer.

[0021] A plurality of gear rings 102 located outside the sprocket 4 are arranged on the inner side of the conveying chain 3, and the gear rings 102 are meshedly connected with the conveying chain 3. A sprocket motor 101 is installed on the surface of the centrally arranged gear ring 102, and the two gear rings 102 located on the same axis are connected by a long rod. The gear ring 102 coaxial with the output end of the driving motor 1 is located on the outer periphery of the driving motor 1, and the gear ring 102 is rotatably connected to the surface of the driving motor 1.

[0022] The surface of the sprocket 4 is provided with a plurality of arc-shaped notches, and the curvature radius of the moving wheel 21 is the same as the curvature radius of the arc-shaped notches, and the distance of the belt body between the two moving wheels 21 is the same as the arc length distance between the two arc-shaped notches.

[0023] Specifically, when the rod-shaped products are conveyed horizontally in normal state, the driving motor 1 drives the sprocket 4 to rotate, thereby driving the movable wheel 21 engaged therewith to move (because the distance between the two movable wheels 21 is the same as the arc length distance between two adjacent arc-shaped notches on the surface of the sprocket 4, so when the sprocket 4 rotates, it can drive the movable wheel 21 engaged therewith to move, thereby driving the conveyor belt 2 to rotate), thereby driving the rotating seat 5 on the surface of the conveyor belt 2 for placing the rod-shaped products to switch the workstations.

[0024] The rotation of the sprocket motor 101 can drive the gear ring 102 to rotate, and then drive the conveyor chain 3 to rotate (the two long rods corresponding to the sprocket 4 penetrate the interior of the sprocket 4, but do not affect the rotation of the sprocket 4, and the two do not affect each other).

[0025] The electromagnetic arc ring 54 and the magnetic layer can be switched to a magnetic attraction state or a magnetic repulsion state according to the state requirements. When the conveyor chain 3 rotates, it can drive the lifting gear 22 and the rotating gear 51 meshed with it to rotate (even if the drive motor 1 stops rotating, the conveyor chain 3 that is still in motion can drive the rotating gear 51 to continue rotating). The lifting gear 22 is designed to prevent the conveyor chain 3 from falling under the action of gravity during the rotation process and play a supporting and lifting role. When the rotating gear 51 rotates, it drives the supporting wheel rod 52 to rotate (at this time, the electromagnetic arc ring 54 in the two supporting wheel rods 52 in the rotating seat 5 is started, so that the end of the tilting rod 53 located in the movable rod 521 tilts upward and engages with the plug interface in the shaft sleeve 6, such as Figure 7 As shown, the movable rod 521, the shaft sleeve 6 and the rotating gear 51 are connected, and then the supporting wheel rod 52 can be driven to rotate synchronously when the rotating gear 51 rotates). The supporting wheel rod 52 rotates, and indirectly drives the rod-shaped product placed on the surface of the supporting wheel rod 52 to rotate. At this time, the rotation direction of the rod-shaped product is opposite to the rotation direction of the supporting wheel rod 52 (because the friction provided by the supporting wheel rod 52 when rotating will drive the rod-shaped product to rotate in the opposite direction, such as Fig.10 as shown).

[0026] Therefore, when the rod-shaped product is driven to be transported and transferred, the rod-shaped product can be rotated and transported, and when it passes through the detection area later, the rotating rod-shaped product can ensure comprehensive detection.

[0027] When the rod-shaped products are conveyed at an angle, the conveyor belt 2 is in an inclined state. When the hole on the surface of the roller rod 52 rotates to the top, the two lower roller rods 52 in the rotating seat 5 are under the action of the electromagnetic arc ring 54. The end of the rod 53 away from the movable rod 521 is tilted upward, and the other end moves downward. Figure 8As shown, it is disconnected from the rotating gear 51. Therefore, in the subsequent movement process, the rotation of the rotating gear 51 at the lower position in the rotating seat 5 will not drive the corresponding supporting wheel rod 52 to rotate, and a blocking structure can be formed by the end of the upward tilting rod 53 to prevent the rod-shaped products placed on the surface of the supporting wheel rod 52 from rolling down under the action of their own weight. At the same time, the tilting rod 53 in the supporting wheel rod 52 at a higher position retains the connection relationship with the rotating gear 51, and can thus rotate normally (such as Fig. 9 As shown in the figure), the rod-shaped product is driven to rotate by means of friction.

[0028] An inclination sensor is installed inside the shaft seat to detect the inclination degree of the rotating seat 5. The inclination sensor is connected to the electromagnetic arc ring 54 signal.

[0029] Specifically, the inclination sensor is used to assist in determining the inclination state of the conveyor belt 2 , thereby providing a basis for subsequent adjustment of the state of the electromagnetic arc ring 54 in the two supporting roller rods 52 in the rotating seat 5 .

[0030] The diameter of the hole is larger than the diameter of the end of the tilting rod 53, and the surface of the sleeve 6 close to the movable rod 521 is provided with an insertion interface corresponding to the inner end of the tilting rod 53 located on the movable rod 521, and the shaft frame is located in the position of the supporting wheel rod 52 close to the movable rod 521.

[0031] Specifically, the diameters of the hole and the insertion port are both larger than the end diameter of the tilting rod 53 , so when the tilting rod 53 is tilted, it can smoothly protrude from the surface of the supporting wheel rod 52 .

[0032] It also includes a conveying control system, which includes a status monitoring module and an interception execution module, wherein the status monitoring module is connected to the inclination sensor signal, and is used to check the inclination state of the conveyor belt 2, and select to adjust the start-up state of the electromagnetic arc ring 54 in the two roller rods 52 in the rotating seat 5, and the interception execution module is connected to the electromagnetic arc ring 54 signal, and is used to adjust the state of the two roller rods 52 in the rotating seat 5.

[0033] The second implementation method: Figure 12-13 It is shown that the surface of the supporting wheel rod 52 is provided with an annular defect in the middle of the two holes, and a spare interception tape 7 is wound around the surface of the annular defect. The spare interception tape 7 includes an electro-variable tape 71 filled with electro-hardening colloid, and an electromagnetic buckle 73 is connected to the tail end of the electro-variable tape 71. A memory tape 72 is connected to the surface of the electro-variable tape 71 away from the annular defect, and a soft magnetic tape that attracts the electromagnetic buckle 73 is installed on the surface of the memory tape 72 away from the electro-variable tape 71.

[0034] There is an angle between the connection position of the spare interception belt 7 and the annular defect and the hole on the cross-section of the roller rod 52. The memory belt 72 is made of memory metal springs, and the curvature radius of the memory belt 72 in the natural state is more than twice the radius of the roller rod 52.

[0035] The magnetic attraction force between the electromagnetic buckle 73 and the soft magnetic tape is greater than the elastic force of the memory tape 72 itself.

[0036] Different from the first embodiment, when the rod-shaped product has a large diameter and is in an inclined conveying state, the height of the tilting rod 53 protruding from the surface of the supporting wheel rod 52 is limited and cannot effectively intercept the rod-shaped product. The rod-shaped product may still roll down (e.g. Fig.11 As shown), this embodiment improves this problem. In this embodiment, the reeled state of the spare intercepting belt 7 is flush with the surface of the supporting wheel rod 52.

[0037] Specifically, when the diameter of the rod-shaped product is large, the power-on state of the electromagnetic buckle 73 can be released. At this time, the memory belt 72 becomes an arc under the action of its own elasticity, driving the electric variable belt 71 to become an arc, and then it is energized and solidified to form an arc-shaped solid support interception structure with an angle with the protruding part of the tilting rod 53, which effectively intercepts the rod-shaped product with a large diameter (such as Fig.14 as shown).

[0038] When the spare interception belt 7 needs to be stored later, taking the spare interception belt 7 bending to the left as an example, all the rod-shaped products can be removed and the power-on state of the electric transformer belt 71 can be released, and then a flat plate can be covered on the surface of the tilted spare interception belt 7 and moved to the right, so that the tilted spare interception belt 7 can be inverted and fit on the surface of the annular recessed, and then the direction of the conveyor chain 3 is adjusted to drive the rotating gear 51 and the support wheel rod 52 to reel in, until the spare interception belt 7 is reeled in, and the electromagnetic buckle 73 is started to fix the spare interception belt 7.

[0039] In summary, the present application utilizes the conveying chain 3 and the rotating seat 5 to drive the rod-shaped products to rotate automatically during the conveying process, so as to facilitate the comprehensive inspection of the rod-shaped products during subsequent inspections, and with the cooperation of the tilting rod 53 and the electromagnetic arc ring 54, during inclined conveying, the lower-positioned support roller rod 52 and the protruding and tilted end of the tilting rod 53 on its surface can be used to intercept the rod-shaped products, and the other support roller rod 52 can continue to drive the rod-shaped products to rotate normally to prevent the rod-shaped products from rolling down during inclined conveying. In addition, in view of the problem that the interception effect of the protruding interception part of the tilting rod 53 is limited due to the large diameter of the rod-shaped products, the spare interception belt 7 can be used for targeted adjustments.

[0040] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. An automatic rotating conveying structure for composite rod products, comprising four sprocket wheels (4), characterized in that: The surface of the sprocket (4) is provided with an arc-shaped notch. The outer surface of the sprocket (4) is drivingly connected to a conveyor belt (2). A conveyor chain (3) is arranged on the outer side of the conveyor belt (2). The conveyor belt (2) is composed of a moving wheel (21) and a belt body. A bracket and a rotating seat (5) arranged at intervals are installed on the top of the belt body. A lifting gear (22) meshingly connected to the conveyor chain (3) is installed on the top of the bracket through a bearing. The rotating seat (5) includes two shaft seats. A supporting wheel rod (52) is rotatably connected inside the shaft seat. A movable rod (521) having a smaller diameter than the supporting wheel rod (52) is connected to one side of the supporting wheel rod (52). The movable rod (521) A shaft sleeve (6) is arranged on the outside of the shaft sleeve (6), a rotating gear (51) meshing with the conveying chain (3) is fixedly connected to the outside of the shaft sleeve (6), and the cross-sectional width of the shaft sleeve (6) is smaller than the cross-sectional width of the rotating gear (51); a tilting rod (53) is installed inside the supporting wheel rod (52) through a shaft frame, and one end of the tilting rod (53) extends to the inside of the movable rod (521); the surfaces of the movable rod (521) and the tilting rod (53) are both provided with holes corresponding to the end of the tilting rod (53); symmetrically arranged electromagnetic arc rings (54) are installed on the inner wall of the supporting wheel rod (52), and a magnetic layer is coated on the surface of the tilting rod (53) at a position corresponding to the electromagnetic arc ring (54).

2. The automatic rotating conveying structure for composite rod products according to claim 1, characterized in that: The surface of the sprocket (4) is provided with a plurality of arc-shaped notches, the curvature radius of the moving wheel (21) is the same as the curvature radius of the arc-shaped notches, and the distance between the two moving wheels (21) and the arc length between the two arc-shaped notches is the same.

3. The automatic rotating conveying structure for composite rod products according to claim 1, characterized in that: An inclination sensor is installed inside each of the shaft seats for detecting the degree of inclination of the rotating seat (5); the inclination sensor is connected to the electromagnetic arc ring (54) by signal.

4. The automatic rotating conveying structure for composite rod products according to claim 1, characterized in that: The diameter of the hole is larger than the diameter of the end of the tilting rod (53), and a plug interface corresponding to the inner end of the tilting rod (53) located in the movable rod (521) is provided on the surface of the shaft sleeve (6) close to the movable rod (521), and the shaft frame is located in a position close to the movable rod (521) in the supporting wheel rod (52).

5. The automatic rotating conveying structure for composite rod products according to claim 1, characterized in that: A plurality of gear rings (102) located outside the sprocket (4) are arranged on the inner side of the conveyor chain (3), and the gear rings (102) are meshingly connected with the conveyor chain (3); a sprocket motor (101) is mounted on the surface of the gear ring (102) arranged in the middle, and two gear rings (102) located on the same axis are connected by a long rod; the gear ring (102) coaxial with the output end of the drive motor (1) is located on the outer periphery of the drive motor (1), and the gear ring (102) is rotatably connected to the surface of the drive motor (1).

6. The automatic rotating conveying structure for composite rod products according to claim 3, characterized in that: The invention also comprises a conveying control system, the conveying control system comprising a state monitoring module and an interception execution module, wherein the state monitoring module is connected to the inclination sensor signal and is used to check the inclination state of the conveyor belt (2) and select and adjust the start state of the electromagnetic arc ring (54) in the two roller rods (52) in the rotating seat (5), and the interception execution module is connected to the electromagnetic arc ring (54) signal and is used to adjust the state of the two roller rods (52) in the rotating seat (5).

7. The automatic rotating conveying structure for composite rod products according to claim 1, characterized in that: The surface of the supporting wheel rod (52) is provided with an annular defect located between the two holes, and a spare interception belt (7) is wound around the surface of the annular defect. The spare interception belt (7) comprises an electric variable belt (71) filled with an electro-hardening colloid, and the tail end of the electric variable belt (71) is connected to an electromagnetic buckle (73). The surface of the electric variable belt (71) on the side away from the annular defect is connected to a memory belt (72), and the surface of the memory belt (72) away from the electric variable belt (71) is installed with a soft magnetic tape that attracts the electromagnetic buckle (73).

8. The automatic rotating conveying structure for composite rod products according to claim 7, characterized in that: An angle is formed between the connection position of the spare interception belt (7) and the annular defect and the hole on the cross section of the roller rod (52); the memory belt (72) is made of a memory metal spring sheet, and the curvature radius of the memory belt (72) in a natural state is more than twice the radius of the roller rod (52).

9. The automatic rotating conveying structure for composite rod products according to claim 8, characterized in that: The magnetic attraction force between the electromagnetic buckle (73) and the soft magnetic tape is greater than the elastic force of the memory tape (72) itself.

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