Platform protection device

Abstract

The utility model relates to the technical field of safety protective fences, in particular to a platform protective device. The platform protection device comprises a pair of bases fixedly arranged on the ground, lifting assemblies and first sliding rails are arranged in the bases, the lifting assemblies are movably arranged on the first sliding rails, and second sliding rails are arranged on the side faces, facing the opposite lifting assemblies, of the lifting assemblies; the multiple sliding blocks are movably arranged on the second sliding rail, a driving structure is arranged on the lifting assembly, the driving structure is connected with the sliding blocks and suitable for driving the sliding blocks to move in the guiding direction of the second sliding rail, and the driving structure is suitable for driving the sliding blocks to move along with lifting of the lifting assembly; the safety door comprises a plurality of safety door baffle plates, and the plurality of safety door baffle plates are arranged between the pair of bases; and the shear fork assembly comprises a plurality of connecting parts, the multiple connecting parts correspond to the multiple sliding blocks one to one and are rotationally connected with the multiple sliding blocks, the multiple sliding blocks are suitable for driving the shear fork assembly to be unfolded or folded, and the two ends of the safety door baffle are fixedly connected with the connecting parts correspondingly.

Description

Technical Field

[0001] The utility model relates to the technical field of safety guardrails, in particular to a platform protection device. Background Art

[0002] In places such as railway platforms or bus stops, when the flow of people is large, passengers close to the tracks or roads may fall onto the tracks or roads due to crowding, which can easily cause safety accidents. In the existing technology, the platform is usually supervised by safety officers, but when the number of people is large, the safety officers have limited energy and are often unable to take care of all the people, which can easily lead to safety accidents. Utility Model Content

[0003] Therefore, the technical problem to be solved by the utility model is that when there is a large flow of people, passengers close to the track or road may fall onto the track or road due to crowding, which may easily cause a safety accident, thereby providing a platform protection device.

[0004] In order to solve the above problems, the utility model provides a platform protection device, comprising:

[0005] A pair of spaced-apart bases are fixedly arranged on the ground, wherein a lifting assembly and a first slide rail are arranged in the bases, wherein the lifting assembly is movably arranged on the first slide rail, and a second slide rail is arranged on a side of the lifting assembly facing the lifting assembly;

[0006] A plurality of sliders are movably arranged on the second slide rail, and a driving structure is arranged on the lifting assembly, the driving structure is connected with the sliders and is suitable for driving the sliders to move along the guide direction of the second slide rail, and the driving structure is suitable for driving the sliders to move as the lifting assembly is lifted;

[0007] A safety door, comprising a plurality of safety door baffles, wherein the plurality of safety door baffles are arranged between a pair of the bases;

[0008] A scissor assembly, wherein the scissor assembly comprises a plurality of connecting parts, wherein the plurality of connecting parts correspond to and are rotatably connected to the plurality of sliders one by one, and the plurality of sliders are suitable for driving the scissor assembly to expand or contract, and the two ends of the safety door baffle are respectively fixedly connected to the connecting parts;

[0009] Wherein, when the scissors assembly is in the unfolded state, the connecting part is suitable for driving the safety door baffle to rotate to be parallel to the ground; when the scissors assembly is in the retracted state, the connecting part is suitable for driving the safety door baffle to rotate in a direction away from the ground and approach each other to form storage.

[0010] Furthermore, the driving structure includes two driving pulley groups, two driving ropes and a connecting plate, the connecting plates are arranged on both sides of the slider close to the ground, the two driving pulley groups are respectively arranged on both sides of the end of the lifting component away from the ground, one end of the driving rope is fixed to the ground, and the other ends of the two driving ropes are respectively passed around the two driving pulley groups and fixedly connected to the connecting plates on both sides of the slider.

[0011] Furthermore, it also includes:

[0012] The slider limiting assembly includes a limiting pulley group and a limiting pull rope. The limiting pulley group is arranged on the end surface of the lifting assembly away from the ground. A counterweight is arranged at one end of the limiting pull rope. The other end of the limiting pull rope bypasses the limiting pulley group and is fixedly connected to the slider among the multiple sliders close to the limiting pulley group.

[0013] Furthermore, the lifting assembly includes a motor fixedly arranged at the bottom of the base, a driving wheel arranged at the output end of the motor, a driven wheel arranged in the base and coordinated with the driving wheel through a chain, a hook arranged on the chain and a lifting part slidably connected to the first slide rail, the hook abuts against the end surface of the lifting part facing the ground, and the second slide rail is arranged on the lifting part.

[0014] Furthermore, the base has two cavities, and the lifting components are arranged in the cavities.

[0015] Furthermore, a plurality of guide wheels are provided on the side of the lifting portion, and the guide wheels are movably matched with the inner wall of the cavity.

[0016] Furthermore, fixing pieces are provided at both ends of the safety door baffle, and the safety door baffle is fixedly connected to the connecting portion through the fixing pieces.

[0017] Furthermore, tightening structures are provided at both ends of the safety door baffle, and the tightening structure includes a fixing plate, a tightening plate, a pulley and an elastic tightening rope. The fixing plate is connected to the tightening plate, the fixing member is arranged on a side of the fixing plate away from the tightening plate, the pulley is rotatably arranged in the tightening plate, the elastic tightening rope is wound around the pulley, and both ends of the elastic tightening rope respectively pass through the tightening plate and are fixedly connected to the side of the safety door baffle.

[0018] Furthermore, the fixing plate and the tightening plate both have a cavity, the opening direction of the fixing plate cavity is toward the tightening plate, the opening direction of the tightening plate cavity is toward the fixing plate, the tightening plate and the fixing plate are fixedly connected by bolts, and there is a gap between the tightening plate and the fixing plate, which is suitable for tightening the bolts to adjust the distance between the tightening plate and the fixing plate to tighten the elastic tightening rope.

[0019] Furthermore, the connecting portion is rotatably connected to the slider via a rotating shaft.

[0020] The utility model has the following advantages:

[0021] The utility model discloses a platform protection device, which is characterized in that the lifting component is raised, the driving component drives the slider to move and the scissor-type component to shrink, and drives the safety door baffle to rotate in the direction away from the ground and approach each other to form a storage so that passengers can pass through; the lifting component is lowered, the driving component drives the slider to move and the scissor-type component to expand, and drives the safety door baffle to rotate to be parallel to the ground and block the passengers, thereby realizing the release and blocking of passengers, which can effectively prevent the occurrence of safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of a platform protection device in an embodiment of the utility model;

[0024] Figure 2 This is a schematic diagram of a scissor assembly in an embodiment of the utility model;

[0025] Figure 3 for Figure 2 A magnified view of part A;

[0026] Figure 4 It is a side view of the scissor assembly in the embodiment of the utility model;

[0027] Figure 5 Schematic diagram of the lifting assembly in the embodiment of the utility model Figure 1 ;

[0028] Figure 6 Schematic diagram of the lifting assembly in the embodiment of the utility model Figure 2 ;

[0029] Figure 7 It is a schematic diagram of a tightening assembly in an embodiment of the utility model;

[0030] Description of reference numerals:

[0031] 1. Base; 2. First slide rail; 3. Sliding block; 4. Second slide rail; 5. Safety door baffle; 6. Scissor assembly; 7. Connecting part; 8. Driving pulley block; 9. Driving rope; 10. Connecting plate; 11. Limiting pulley block; 12. Limiting rope; 13. Driving wheel; 14. Driven wheel; 15. Chain; 16. Hook; 17. Lifting part; 18. Guide wheel; 19. Fixing piece; 20. Fixing plate; 21. Tightening plate; 22. Pulley; 23. Elastic tightening rope; 24. Bolt. DETAILED DESCRIPTION

[0032] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0036] like Figures 1 to 7As shown, this embodiment discloses a platform protection device, including: a pair of bases 1, a plurality of sliders 3, a safety door and a scissor assembly 6. A pair of bases 1 are fixedly arranged on the ground, a lifting assembly and a first slide rail 2 are arranged in the base 1, the lifting assembly is movably arranged on the first slide rail 2, and a second slide rail 4 is arranged on the side of the lifting assembly facing the relative lifting assembly. A plurality of sliders 3 are movably arranged on the second slide rail 4, a driving structure is arranged on the lifting assembly, the driving assembly is connected with the slider 3 and is suitable for driving the slider 3 to move along the guide direction of the second slide rail 4, and the driving assembly is suitable for driving the slider 3 to move along with the lifting assembly. The safety door includes a plurality of safety door baffles 5, and the plurality of safety door baffles 5 are arranged between the pair of bases 1. The scissor assembly 6, the scissor assembly 6 includes a plurality of connecting parts 7, the plurality of connecting parts 7 correspond to the plurality of sliders 3 one by one and are rotatably connected, the plurality of sliders 3 are suitable for driving the scissor assembly 6 to expand or contract, and the two ends of the safety door baffle 5 are respectively fixedly connected to the connecting part 7. Among them, when the scissors assembly 6 is in the unfolded state, the connecting part 7 is suitable for driving the safety door baffle 5 to rotate to be parallel to the ground. When the scissors assembly 6 is in the retracted state, the connecting part 7 is suitable for driving the safety door baffle 5 to rotate in a direction away from the ground and approach each other to form a storage form.

[0037] Specifically, a pair of bases 1 are arranged at intervals, and any base 1 has a notch on the side facing the other base 1. The base 1 has a first slide rail 2, and the lifting assembly is movably arranged on the first slide rail 2. The lifting assembly can move vertically upward or vertically downward along the guide direction of the first slide rail 2. The lifting assembly has a second slide rail 4 on the side facing the notch, and multiple sliders 3 are movably arranged on the second slide rail 4. A driving structure is arranged on the lifting assembly, and the driving structure can drive the sliders 3 to move vertically upward or vertically downward along the guide direction of the second slide rail 4. The driving structure is linked with the lifting assembly. When the lifting assembly moves vertically upward, the driving structure drives the multiple sliders 3 to move vertically upward, and when the lifting assembly moves vertically downward, the driving structure drives the multiple sliders 3 to move vertically downward. The scissor assembly 6 is arranged in the base 1, and the scissor assembly 6 is connected to the multiple sliders 3 through multiple connecting parts 7. The multiple connecting parts 7 correspond to the multiple sliders 3 one by one and are rotatably connected. The two ends of the multiple safety door baffles 5 extend from the notch respectively and are fixedly connected to the connecting parts 7.

[0038] When release is required, the lifting assembly moves vertically upward, and the driving structure drives the slider 3 to move vertically upward, and makes multiple sliders 3 approach each other, driving the scissor assembly 6 to retract. When the scissor assembly 6 retracts, the connecting part 7 will rotate, and drive the safety door baffle 5 to rotate in the direction away from the ground and approach each other, forming storage, removing the obstruction, and allowing passengers to pass; when blocking is required, the lifting assembly moves vertically downward, and the driving structure drives the slider 3 to move vertically downward, and makes multiple sliders 3 away from each other, driving the scissor assembly 6 to expand. When the scissor assembly 6 is expanded, the connecting part 7 will rotate, and drive the safety door to rotate until it is perpendicular to the ground. At this time, multiple safety door baffles 5 form a safety door to block the passengers.

[0039] Furthermore, the driving structure includes two driving pulley groups 8, two driving ropes 9 and a connecting plate 10. The connecting plate 10 is arranged on both sides of the slider 3 close to the ground. The two driving pulley groups 8 are respectively arranged on both sides of the end of the lifting component away from the ground. One end of the driving rope 9 is fixed to the ground, and the other ends of the two driving ropes 9 are respectively passed around the two driving pulley groups 8 and fixedly connected to the connecting plates 10 on both sides of the slider 3.

[0040] Specifically, Figures 2 to 4 As shown, two driving pulley blocks 8 are respectively arranged on both sides of the end of the lifting assembly away from the ground. In this embodiment, the connecting plate 10 is arranged on Figure 4 On both sides of the second slider 3 from bottom to top, one end of the two driving ropes 9 is fixed to the ground, and the other ends of the two driving ropes 9 are respectively passed through two driving pulleys 22 and fixedly connected to the connecting plates 10 on both sides of the slider 3. When the lifting assembly is vertically upward, because one end of the driving rope 9 is fixedly connected to the ground, the driving pulley 22 will pull the other end of the driving rope 9, and the other end of the driving rope 9 will pull the slider 3 to move. Multiple sliders 3 are connected to each other through the scissor assembly 6. The slider 3 with the connecting plate 10 will pull other sliders 3 to move through the scissor assembly 6, so that the scissor assembly 6 will shrink. In other optional embodiments, the connecting plate 10 can be set Figure 4 On both sides of the first slider 3 from bottom to top.

[0041] Furthermore, it also includes: a slider 3 limiting assembly. The slider 3 limiting assembly includes a limiting pulley block 11 and a limiting pull rope 12. The limiting pulley block 11 is arranged on the end surface of the lifting assembly away from the ground, one end of the limiting pull rope 12 is provided with a counterweight, and the other end of the limiting pull rope 12 bypasses the limiting pulley block 11 and is fixedly connected to a slider 3 among the multiple sliders 3 close to the limiting pulley block 11.

[0042] Specifically, Figures 2 to 4As shown, the limit pulley block 11 is arranged on the end surface of the lifting assembly away from the ground and is located between the two driving pulley blocks 8. One end of the limit pull rope 12 is provided with a counterweight and is located in the base 1. The other end of the limit pull rope 12 passes through the limit pulley block 11 and Figure 3 The slider 3 near the limit pulley block 11 is fixedly connected, and the length of the limit rope 12 is less than the length of the driving rope 9. When the lifting assembly moves vertically downward, multiple sliders 3 move vertically downward at the same time. At this time, the slider 3 near the limit pulley block 11 will pull the limit rope 12 until the counterweight abuts against the limit pulley 22, and limit the slider 3 near the limit pulley block 11, so that the slider 3 stops moving. The slider 3 near the limit pulley block 11 will pull other sliders 3 through the scissor assembly 6, and the scissor assembly 6 will unfold, so that multiple safety door baffles 5 form a safety door.

[0043] Furthermore, the lifting assembly includes a motor fixedly arranged at the bottom of the base 1, a driving wheel 13 arranged at the output end of the motor, a driven wheel 14 arranged in the base 1 and cooperating with the driving wheel 13 through a chain 15, a hook 16 arranged on the chain 15 and a lifting part 17 slidably connected to the first slide rail 2, the hook 16 abuts against the end surface of the lifting part 17 facing the ground, and the second slide rail 4 is arranged on the lifting part 17.

[0044] Specifically, Figure 5 and Figure 6 As shown, the driving wheel 13 arranged at the output end of the motor cooperates with the driven wheel 14 through the chain 15, the hook 16 is arranged on the chain 15 and moves vertically upward or vertically downward as the chain 15 rotates, the hook 16 abuts against the bottom of the lifting part 17, and when the hook 16 moves vertically upward or vertically downward, it drives the lifting part 17 to move vertically upward or vertically downward.

[0045] It should be noted that the motor is connected to the controller. When release is required, the controller receives a signal to control the motor to start, drive the driving wheel 13 to rotate, and make the hook 16 drive the lifting part 17 to move vertically upward; when blocking is required, the controller receives a signal to control the motor to start, drive the driving wheel 13 to rotate, and make the hook 16 drive the lifting part 17 to move vertically downward. The software that realizes the functions of the controller can be easily designed by people in this field.

[0046] Furthermore, the base 1 has two cavities, and lifting components are arranged in the cavities.

[0047] Specifically, Figure 1 As shown, the base 1 has two cavities, each of which has a lifting assembly. The two lifting assemblies of one base 1 can cooperate with the lifting assemblies of two adjacent bases 1.

[0048] Further, such as Figure 5 and Figure 6 As shown, a plurality of guide wheels 18 are provided on the side of the lifting part 17, and the guide wheels 18 move in cooperation with the inner wall of the cavity. The guide wheels 18 can provide a guiding function and also improve the stability of the lifting part 17 when it rises or falls.

[0049] Furthermore, fixing members 19 are provided at both ends of the safety door baffle 5 , and the safety door baffle 5 is fixedly connected to the connecting portion 7 via the fixing members 19 .

[0050] Specifically, the fixing member 19 can extend from the slot into the base 1 and be fixedly connected to the connecting portion 7 .

[0051] Further, such as Figure 7 As shown, tightening structures are provided at both ends of the safety door baffle 5, and the tightening structures include a fixing plate 20, a tightening plate 21, a pulley 22 and an elastic tightening rope 23. The fixing plate 20 is connected to the tightening plate 21, the fixing member 19 is provided on a side of the fixing plate 20 away from the tightening plate 21, the pulley 22 is rotatably provided in the tightening plate 21, the elastic tightening rope 23 is wound around the pulley 22, and both ends of the elastic tightening rope 23 respectively penetrate the tightening plate 21 and are fixedly connected to the side of the safety door baffle 5. The safety door baffle 5 is tightened and fixed by the elastic tightening ropes 23 at both ends.

[0052] Further, such as Figure 7 As shown, both the fixing plate 20 and the tightening plate 21 have cavities, the opening direction of the cavity of the fixing plate 20 faces the tightening plate 21, and the opening direction of the cavity of the tightening plate 21 faces the fixing plate 20. The tightening plate 21 and the fixing plate 20 are fixedly connected by bolts 24, and there is a gap between the tightening plate 21 and the fixing plate 20, which is suitable for tightening the bolts 24 to adjust the distance between the tightening plate 21 and the fixing plate 20 to tighten the elastic tightening rope 23. By rotating the bolts 24, the tightening plate 21 moves toward the fixing plate 20, and the tightening plate 21 can pull the elastic tightening rope 23, and the elastic tightening rope 23 can tighten and fix the safety door baffle 5.

[0053] Furthermore, in this embodiment, the connecting portion 7 is rotatably connected to the slider 3 via a rotating shaft.

[0054] Preferably, in this embodiment, there are five sliders 3 and five safety door baffles 5. In other optional embodiments, there may be six sliders 3 and six safety door baffles 5 or four sliders 3 and four safety door baffles 5, etc. The number of sliders 3 and safety door baffles 5 can be selected according to the required blocking height and platform length.

[0055] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A platform protection device, characterized in that: include: A pair of spaced-apart bases (1) are fixedly arranged on the ground, a lifting assembly and a first slide rail (2) are arranged in the base (1), the lifting assembly is movably arranged on the first slide rail (2), and a second slide rail (4) is arranged on the side of the lifting assembly facing the lifting assembly; A plurality of sliders (3) are movably arranged on the second slide rail (4); a driving structure is arranged on the lifting assembly; the driving structure is connected to the sliders (3) and is suitable for driving the sliders (3) to move along the guide direction of the second slide rail (4); the driving structure is suitable for driving the sliders (3) to move as the lifting assembly is lifted; A safety door, comprising a plurality of safety door baffles (5), wherein the plurality of safety door baffles (5) are arranged between a pair of bases (1); A scissor-fork assembly (6), the scissor-fork assembly (6) comprising a plurality of connecting parts (7), the plurality of connecting parts (7) corresponding one-to-one to the plurality of sliders (3) and being rotatably connected, the plurality of sliders (3) being suitable for driving the scissor-fork assembly (6) to expand or contract, and the two ends of the safety door baffle (5) being fixedly connected to the connecting parts (7) respectively; When the scissor assembly (6) is in an extended state, the connection portion (7) is suitable for driving the safety door baffle (5) to rotate to be parallel to the ground; when the scissor assembly (6) is in a retracted state, the connection portion (7) is suitable for driving the safety door baffle (5) to rotate in a direction away from the ground and move closer to each other to form a storage state.

2. The platform protection device according to claim 1, characterized in that: The driving structure comprises two driving pulley blocks (8), two driving ropes (9) and a connecting plate (10); the connecting plate (10) is arranged on both sides of the slider (3) close to the ground; the two driving pulley blocks (8) are respectively arranged on both sides of an end of the lifting component away from the ground; one end of the driving rope (9) is fixed to the ground; the other ends of the two driving ropes (9) respectively pass through the two driving pulley blocks (8) and are fixedly connected to the connecting plates (10) on both sides of the slider (3).

3. The platform protection device according to claim 2, characterized in that: Also includes: The slider (3) limiting assembly comprises a limiting pulley block (11) and a limiting pull rope (12); the limiting pulley block (11) is arranged on the end surface of the lifting assembly away from the ground; one end of the limiting pull rope (12) is provided with a counterweight; the other end of the limiting pull rope (12) bypasses the limiting pulley block (11) and is fixedly connected to the slider (3) close to the limiting pulley block (11) among the plurality of sliders (3).

4. The platform protection device according to claim 1, characterized in that: The lifting assembly comprises a motor fixedly arranged at the bottom of the base (1), a driving wheel (13) arranged at the output end of the motor, a driven wheel (14) arranged in the base (1) and cooperating with the driving wheel (13) through a chain (15), a hook (16) arranged on the chain (15) and a lifting part (17) slidably connected to the first slide rail (2), the hook (16) abutting against the end surface of the lifting part (17) facing the ground, and the second slide rail (4) is arranged on the lifting part (17).

5. The platform protection device according to claim 4, characterized in that: The base (1) has two cavities in it, and the lifting assembly is arranged in the cavity.

6. The platform protection device according to claim 5, characterized in that: A plurality of guide wheels (18) are arranged on the side of the lifting portion (17), and the guide wheels (18) are movably matched with the inner wall of the cavity.

7. The platform protection device according to any one of claims 1 to 6, characterized in that: Fixing members (19) are provided at both ends of the safety door baffle (5), and the safety door baffle (5) is fixedly connected to the connecting portion (7) via the fixing members (19).

8. The platform protection device according to claim 7, characterized in that: Tightening structures are provided at both ends of the safety door baffle (5), and the tightening structure comprises a fixing plate (20), a tightening plate (21), a pulley (22) and an elastic tightening rope (23); the fixing plate (20) is connected to the tightening plate (21); the fixing member (19) is arranged on a side of the fixing plate (20) away from the tightening plate (21); the pulley (22) is rotatably arranged in the tightening plate (21); the elastic tightening rope (23) is wound around the pulley (22); and the two ends of the elastic tightening rope (23) respectively penetrate the tightening plate (21) and are fixedly connected to the side of the safety door baffle (5).

9. The platform protection device according to claim 8, characterized in that: The fixing plate (20) and the tightening plate (21) both have cavities, the opening direction of the cavity of the fixing plate (20) faces the tightening plate (21), and the opening direction of the cavity of the tightening plate (21) faces the fixing plate (20). The tightening plate (21) and the fixing plate (20) are fixedly connected by bolts (24). There is a gap between the tightening plate (21) and the fixing plate (20), which is suitable for tightening the bolts (24) to adjust the distance between the tightening plate (21) and the fixing plate (20) so as to tighten the elastic tightening rope (23).

10. The platform protection device according to claim 1, 2, 3, 4, 5, 6, 8 or 9, characterized in that: The connecting portion (7) is rotationally connected to the slider (3) via a rotating shaft.

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