Long stroke telescoping isolation device

Abstract

The utility model relates to a long-stroke telescopic isolation equipment, including stand, pulley system, counterweight spare and pull rope, pulley system, counterweight spare and pull rope set up in stand, be provided with the rope outlet on the stand, the free end of pull rope extends to the outside of stand through the rope outlet, the pulley system includes the fixed pulley group of fixed stand and the movable pulley group of movable stand, movable pulley group sets up below fixed pulley group and connects counterweight spare, the fixed pulley group and / or movable pulley group have at least two pulleys, the fixed end of pull rope is fixed between fixed pulley group and movable pulley group, after pull rope passes pulley in fixed pulley group and movable pulley group alternately, reach the free end, this technical scheme can adopt the pipe diameter of thinner, under the condition of the same isolation fence height, pull rope has longer stroke, and when using, pull rope stretch stability will not produce additional friction resistance.

Description

Technical Field

[0001] This utility model relates to the field of guardrails, and in particular to a long-stroke telescopic isolation device. Background Technology

[0002] Isolation devices such as guardrails use pull ropes to demarcate areas or passageways. The retractable pull ropes are naturally retracted within the guardrail. In use, tension is applied to the ropes to extend them beyond the guardrail. Common retractable guardrails are mainly classified into two types: the first type uses a horizontal retraction method, where the pull rope is wound around a retractable head, and extension is achieved by horizontal rotation within the head (e.g., Chinese Utility Model Patent Publication CN222436057U). The problem with this type is that the extension stroke is affected by the diameter of the retractable head's pipe; therefore, a smaller pipe diameter cannot be used to achieve a longer stroke. The second type uses a vertical retraction method, where the pull rope moves vertically within the guardrail via a pulley system to achieve extension (e.g., Chinese Invention Application Publication CN115929107A). This type is suitable for smaller pipe diameters, but the pull rope stroke is mainly affected by the height of the guardrail; the extension distance cannot exceed three times the height.

[0003] To overcome the limitation of vertical storage methods on the height of the guardrail, multiple movable pulleys can be set to extend the travel of the pull rope. However, due to the increase in the number of pulleys, there are higher requirements for the position of the pulleys. If the pulleys deviate significantly during use, it may cause friction between the pull ropes or the pull ropes to come off the pulleys. If a pulley limiting mechanism is set, it will create resistance to the rotation of the pulleys, affecting the use. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a telescopic isolation device that can use a smaller pipe diameter, and the pull rope has a longer stroke under the same isolation barrier height. Moreover, the pull rope is stable during use and does not generate additional frictional resistance. In addition, the pull rope is more stable when used in conjunction with other telescopic isolation devices.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: A long-stroke telescopic isolation device includes a column, a pulley system, a counterweight, and a pull rope. The pulley system, counterweight, and pull rope are disposed inside the column. The column has a rope outlet, through which the free end of the pull rope extends to the outside of the column. The pulley system includes a fixed pulley group fixed to the column and a movable pulley group movable on the column. The movable pulley group is disposed below the fixed pulley group and connected to the counterweight. The number of pulleys in the movable pulley group is X, where X is an integer and X≥2. The pulley system has a number of Y pulleys, where Y is an integer and X-1≤Y≤X+1. The fixed end of the pull rope is fixed between the fixed pulley system and the movable pulley system. The pull rope alternately passes over the pulleys in the fixed pulley system and the movable pulley system before reaching its free end. Each pulley in the fixed pulley system and / or the movable pulley system includes a support shaft, an inner ring, an outer ring, and a limiting member. The inner ring is movably connected to the support shaft. The outer ring cooperates with the pull rope and is rotatably connected to the inner ring. The limiting member cooperates with the inner ring to limit the inner ring at the support shaft.

[0006] By setting two or more movable pulleys, the rope can have a longer stroke in the narrower diameter guardrail, such as more than three times the height of the pole. The pulleys have an inner and outer ring structure, which allows the pulleys to be disassembled and installed, and the position of the inner ring can be restricted by the limiting component without affecting the rotation of the outer ring.

[0007] Preferably, the limiting member is hollow and sleeved outside the support shaft. The limiting member includes a protrusion and a flange. The protrusion cooperates with the inner ring, and the flange is used to position the limiting member.

[0008] The limiting component has a structure that allows for easy assembly and disassembly and can be fitted with the inner ring.

[0009] Furthermore, the pulleys in the fixed pulley group and the movable pulley group are arranged vertically. The diameter of the pulleys in the fixed pulley group decreases from top to bottom, while the diameter of the pulleys in the movable pulley group increases from top to bottom. The rope starts from the fixed end and alternately passes around the pulleys in the fixed pulley group and the movable pulley group in order of increasing pulley diameter before reaching the free end.

[0010] Vertically arranged pulleys can effectively accommodate multiple pulley sets in narrower pipes. The matching diameters of the pulleys in the pulley set allow the ropes to be arranged in a straight line without causing friction between the ropes, and there is no need to set up an additional rope guide mechanism.

[0011] Furthermore, Y=X, and the fixed end of the pull rope is fixed to the movable pulley block or counterweight.

[0012] When the number of pulleys in the fixed pulley block and the movable pulley block are the same, a longer stroke can be obtained when the fixed end of the rope is fixed to the movable pulley block or the counterweight.

[0013] Preferably, the fixed pulley block further includes a guide rod, which is located on the side away from the rope outlet. The pull rope passes around all the pulleys and then around the guide rod to reach the rope outlet.

[0014] When the number of pulleys in the fixed pulley block and the movable pulley block is the same, and the fixed end of the rope is fixed to the movable pulley block or the counterweight, the rope will eventually pass around the bottom pulley of the movable pulley block. At this point, passing around the guide rod on the side away from the rope outlet can keep the rope from slackening and prevent friction between the ropes.

[0015] Preferably, the pulleys in the fixed pulley group and the movable pulley group are arranged side by side and spaced apart.

[0016] The ropes between multiple sets of pulleys arranged side by side after spacing will not interfere with each other.

[0017] Preferably, the counterweight includes a counterweight block with a slot, and the movable pulley group is disposed in the slot.

[0018] The movable pulley block is directly set in the slot of the counterweight block, which can reduce the overall height of the counterweight and the movable pulley block without changing the weight, thus allowing the rope to have a longer stroke.

[0019] Furthermore, it also includes a handle, which is connected to the free end of the pull rope. The handle has a connecting part with a notch. The column is provided with a connecting port that mates with the connecting part. The connecting port is provided with a stop block that mates with the notch. The connecting part also includes a channel and a recess. The channel intersects with the notch and allows the stop block to enter. The recess intersects with the channel and allows the stop block to enter.

[0020] When the pull rope is used in conjunction with other telescopic isolation devices, the stop block is allowed to enter the notch, and then the handle is turned to allow the stop block to enter the channel to complete the connection. Subsequently, under the action of the pull rope tension, the stop block enters the notch, so that after the handle and the connection port are connected, the stop block will not move undesirably in the channel and fall out of the notch.

[0021] Furthermore, it also includes a handle, the handle being connected to the free end of the pull cord, the handle having a connecting part, the connecting part having a first magnetic attraction part recessed therein, the column having a connecting port, the connecting port having a second magnetic attraction part protruding outward, and the first magnetic attraction part and the second magnetic attraction part having a gap when they cooperate.

[0022] When the pull rope is used in conjunction with other telescopic isolation devices, it is completed by the cooperation of the first magnetic part and the second magnetic part. The concave design of the first magnetic part can effectively prevent the first magnetic part from being damaged by impact with the outside world. It also serves to guide the second magnetic part and prevent it from coming off after cooperation. At the same time, since the first magnetic part and the second magnetic part need to have a large attraction force to overcome the weight of the counterweight, there is a gap when the first magnetic part and the second magnetic part cooperate to prevent damage from impact due to excessive attraction force.

[0023] Preferably, the number of connection ports is three, and the rope outlet and connection ports are equally spaced.

[0024] Multiple connection ports are provided so that the pull ropes of other telescopic isolation devices can be used with it from three directions.

[0025] Compared with the prior art, this utility model has the following advantages and effects: 1. By setting two or more movable pulleys, a longer travel distance can be achieved for the rope in the narrower diameter guardrail. 2. The pulley adopts an inner and outer ring structure, which allows the pulley to be disassembled and assembled, and the position of the inner ring can be restricted by the limiting component without affecting the rotation of the outer ring; 3. The structure of the limiting component is convenient for disassembly and assembly and can be matched with the inner ring; 4. Offers both vertical and side-by-side pulley installation options, effectively utilizing the internal space of the pole and preventing friction between the ropes; 5. The structure of the counterweight further utilizes the internal space of the upright to allow the pull rope to have a longer stroke; 6. The handle and connector design makes the pull rope more stable and convenient when used with other telescopic isolation devices. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a perspective view of Example 1.

[0028] Figure 2 This is an exploded view of the structure of Example 1.

[0029] Figure 3 This is a perspective view of the fixed pulley frame in Example 1.

[0030] Figure 4 This is a perspective view of the movable pulley frame in Example 1.

[0031] Figure 5A This is a perspective view of the pulley assembly in Example 1.

[0032] Figure 5B This is a front view of the pulley assembly in Example 1.

[0033] Figure 6A This is a perspective view of the limiting component in Example 1.

[0034] Figure 6B This is a front view of the limiting component in Example 1.

[0035] Figure 7 This is a schematic cross-sectional view of one of the vertical directions in Example 1.

[0036] Figure 8 This is a cross-sectional view of Example 1 in another vertical direction.

[0037] Figure 9 This is a front view of the pulley system after stretching in Example 1.

[0038] Figure 10 This is a perspective view of the assembled fixed pulley frame in Example 1.

[0039] Figure 11 for Figure 10 A magnified view of the handle.

[0040] Figure 12 This is an exploded view of the structure of Example 2.

[0041] Figure 13 This is a perspective view of Example 2.

[0042] Figure 14A This is a perspective view of the pulley system in Example 3.

[0043] Figure 14B This is a front view of the pulley system in Example 3.

[0044] Figure 15 This is a schematic diagram of the pulley system in Example 4.

[0045] Figure 16 This is a connection diagram of two long-stroke telescopic isolation devices in Example 5.

[0046] Figure 17 for Figure 16 Enlarged cross-sectional view of the connection point.

[0047] Label Explanation: Upright pole 11, connecting port 111, top cover 112, base 113, base screw 114, rope outlet 115, stop block 116, fixed pulley bracket 12, mounting hole 121, fixed pulley bracket screw 122, movable pulley bracket 13, fixed rod 131, pulley 14, inner ring 141, outer ring 142, flange 1431, protrusion 1432, protrusion 1433, support shaft 144, guide rod 15, pull rope 16, handle 17, notch 171, channel 172, recess 173; Upright pole 21, connecting port 211, rope outlet 215; Fixed pulley frame 32, fixed rod 321, movable pulley frame 33, pulley 34, pull rope 36; Fixed pulley frame 42, movable pulley frame 43, fixed rod 431, pulley 44, guide rod 45, pull rope 46, handle 47; Upright pole 51, connecting port 511, second magnetic suction part 512, spring 513, fixed pulley frame 52, pull rope 56, handle 57, connecting part 571, first magnetic suction part 572, rubber ring 573. Detailed Implementation

[0048] The present invention will be further described in detail below with reference to the embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0049] Example 1: like Figure 1 and 2 As shown, this embodiment is a long-stroke telescopic isolation device. Its upright post 11 is 60cm high and 3.8cm in diameter, belonging to a relatively thin-diameter isolation railing. A top cover 112 is provided on top of the upright post 11, and a base 113 is connected to it below via base screws 114 to ensure the upright post 11 is placed vertically on the ground. In some embodiments, the upright post can be directly fixed to the ground or wall with screws, thus eliminating the need for a base. The upright post 11 is provided with a connection port 111 and a rope outlet 115. A pulley system is placed inside the hollow upright post 11. The pulley system includes a fixed pulley frame 12 and a movable pulley frame 13 located below the fixed pulley frame 12. Two pulleys 14 are connected to both the fixed pulley frame 12 and the movable pulley frame 13 (see [reference]). Figure 3 and 4 The pull rope 16 alternately passes around the pulley 14 and extends out of the rope outlet 115 to form a pole 11. The free end of the pull rope 16 extending out of the pole 11 is provided with a handle 17. The handle 17 is used to facilitate the user to apply force and to connect with the connection port 111 of other isolation equipment.

[0050] Combination Figure 3 and 4The fixed pulley frame 12 is provided with mounting holes 121 and fixed pulley frame screws 122. The top cover 112 is fixed to the mounting holes 121 by screwing. The fixed pulley frame 12 is then fixedly connected to the upright 11 by the fixed pulley frame screws 122 on both sides. The fixed pulley frame 12 is also fixed with pulleys 14 and guide rods 15. The movable pulley frame 13 is a counterweight block. The movable pulley frame 13 and the counterweight are integrated to reduce the overall height and thus increase the stroke. The counterweight block has a slot for the pulley 14 to be installed. At the same time, a fixing rod 131 is provided at the top. The fixing rod 131 is used to connect the fixed end of the pull rope 16.

[0051] Combination Figures 5A to 7 To describe how pulley 14 is mounted on fixed pulley frame 12 and movable pulley frame 13, pulley 14 includes inner ring 141, outer ring 142, limiting member and support shaft 144. Support shaft 144 is composed of pins and pins, which are screwed together to form support shaft 144. Each end of support shaft 144 has an end face with a larger area than the shaft portion. Inner ring 141 and outer ring 142 can rotate relative to each other (such as a bearing structure). Inner ring 141 is used to fit on support shaft 144. Outer ring 142 is wider than inner ring 141 and has a groove recessed from both sides to the middle. The groove is used to place and limit pull rope 16. Figure 7 Two types of limiting members are shown. One type, as shown in 6A and 6B, includes a flange 1431 and a protrusion 1432. This type of limiting member is hollow and sleeved on the support shaft 144. The flange 1431 is positioned by engaging with the end face of the support shaft 144 and the surface of the fixed pulley frame 12 or the movable pulley frame 13 on both sides. The protrusion 1432 extends along the surface of the support shaft 144 towards the center and is positioned opposite the inner ring 141. The protrusions 1432 on both sides hold the inner ring 141 on the support shaft 144. The 44 is positioned or limited to slide within a small range (e.g., 2mm). During installation, first, one side of the limiting component is fitted onto the pin. Then, the inner ring 141 is placed in the groove of the fixed pulley frame 12 or the movable pulley frame 13, aligning the hole of the inner ring 141 with the holes on both sides of the fixed pulley frame 12 or the movable pulley frame 13. The pin is then passed through these three holes. Next, the other side of the limiting component is fitted onto the pin. Finally, the pin is screwed in to fix the entire pulley 14 on the fixed pulley frame 12 or the movable pulley frame 13. Figure 7 The upper pulley 14 in the fixed pulley frame 12 and the pulley 14 in the movable pulley frame 13 adopt this type of limiting member. Another type of limiting member is shown below. Figure 7The lower pulley 14 in the fixed pulley frame 12 has a limiting member consisting of protrusions 1433 protruding inward from the surface of the fixed pulley frame 12. The pulley is directly limited by the protrusions 1433 on both sides. During installation, the inner ring 141 is placed between the protrusions 1433, and then the pin and pin are installed. The limiting method of the protrusions 1433 is suitable for pulleys 14 with smaller diameters of inner ring 141 and outer ring 142. By setting the above limiting member, the centers of all pulleys 14 can be kept basically on the same straight line during use, thereby avoiding unwanted friction or even intersection of the ropes 16 during use. At the same time, the limiting member will not affect the rotation of the outer ring 142, causing an increase in the friction between it and the rope 16.

[0052] Combination Figure 8 To describe how the pulleys 14 and ropes 16 are set up, the pulleys 14 in the fixed pulley frame 12 and the movable pulley frame 13 are set vertically. The diameter of the pulleys 14 in the fixed pulley frame 12 decreases from top to bottom, while the diameter of the pulleys 14 in the movable pulley frame 13 increases from top to bottom. The degree of decrease or increase is such that the sum of the groove diameter and the rope diameter is smaller than the groove diameter of the next or previous level groove, thus avoiding mutual friction between the ropes 16. During installation, the ropes 16... The fixed end is first fixed to the fixed rod 131, and then passes sequentially around the lower pulley 14 of the fixed pulley frame 12, the upper pulley 14 of the movable pulley frame 13, the upper pulley 14 of the fixed pulley frame 12, and the lower pulley 14 of the movable pulley frame 13. After passing the lower pulley 14 of the movable pulley frame 13, the pull rope 16 is located diagonally opposite the rope outlet 115. At this point, the pull rope 16 then goes up and passes around the guide rod 15 on the side away from the rope outlet 115, and finally extends out from the rope outlet 115. Figure 9 This is a view of the pulley system after it has been stretched. During use, by applying a pulling force to the handle 17 to overcome the weight of the counterweight, the movable pulley frame 13 is lifted as a whole, allowing the pull rope 16 to extend further beyond the upright 11. In this embodiment, the pull rope 16 can be stretched to a distance of 194cm. If a larger diameter upright is used, three or more sets of pulleys can be installed in both the fixed and movable pulley frames. Alternatively, the number of pulleys in the fixed and movable pulley frames can be adjusted according to the actual required stretching distance, ensuring that the absolute value of the difference between the number of pulleys in the fixed and movable pulley frames is less than one.

[0053] Figure 10 and 11The diagram illustrates how the connection port 111 and handle 17 are set up and cooperate. The handle 17 has a connecting part with a notch 171. A groove, i.e., a channel 172, is provided behind the notch 171. The channel 172 intersects with the notch 171. A notch 173 is also provided in the channel 172 facing the notch 171. The notch 171, channel 172, and notch 173 are used to cooperate with the stop block 116 at the connection port 111. During connection, the notch 171 of the handle 17 is aligned with the stop block 116 and inserted into the connection port 111. Then, the handle 17 is rotated so that the stop block 116 enters the channel 172. The handle 17 is released at the appropriate position. Under the influence of the gravity of the counterweight, the pull rope 16 is pulled back, and the stop block 116 enters the notch 173 to complete the limiting connection. In this embodiment, connection ports 111 are provided on both sides and the back of the rope outlet 115. The three connection ports 111 are equally spaced, so that the handle 17 can be connected to the connection port 111 from three different directions, or one pole 11 can be connected to the handle 17 of multiple different poles 11 at the same time.

[0054] Example 2: Figure 12 and 13 Example 2 is shown. The pulley system in Example 2 is the same as that in Example 1. The difference is that Example 2 uses a 120cm high pole 21. The pole 21 can accommodate two sets of pulley systems in the vertical direction. By setting two sets of connection ports 211 and rope outlets 215 on the pole 21, two pull ropes 16 with different heights can be realized in one pole 21. The pole 21 can be connected with other poles 21, or it can be connected with the pole 11 in Example 1 to achieve different height combinations.

[0055] Example 3: Figure 14A and 14B Example 3 is shown, which is a scheme in which multiple sets of pulleys 34 are arranged side by side at intervals. In the fixed pulley frame 32, three intervals are arranged side by side, and each interval is provided with a fixed rod 321 and two sets of pulleys 34. The movable pulley frame 33 is also arranged side by side with three intervals, and each interval is used to set three sets of pulleys 34. The structure and arrangement of the pulleys 34 are the same as the pulleys 14 in Example 1. The center of the pulleys 34 in the fixed pulley frame 32 and the center of the pulleys 34 in the movable pulley frame 33 are located on the same plane. The fixed end of the rope 36 is fixed to the fixed rod 321, and extends out of the upright after passing through all the pulleys 41 in the fixed pulley frame 32 and the movable pulley frame 33 in order from near to far. The side by side scheme of Example 3 is more suitable when the diameter of the upright is large.

[0056] Example 4: Figure 15Example 4 is shown. Example 4 is basically the same as Example 1, except that the pulleys 44 in the fixed pulley frame 42 and the movable pulley frame 43 have the same diameter. The fixed end of the pull rope 46 is fixed to the fixed rod 431 and then passes around the first set of pulleys 44 in the fixed pulley frame 42 and the movable pulley frame 43. The subsequent pull ropes 46 all pass through the guide rod 45 to reach the next pulley 44 and pass around it. By setting the guide rod 45, the mutual friction between the pull ropes 46 can also be prevented.

[0057] Example 5: Figure 16 and 17 Example 5 is shown. Example 5 is basically the same as Example 1, except that the connection between the handle 57 and the connection port 511 is achieved by magnetic attraction. Therefore, the structure of the handle 57, the connection port 511, and the fixed pulley bracket 52 is changed. The handle 57 has a connecting part 571, in which a first magnetic attraction part 572 is recessed. The first magnetic attraction part 572 is limited in the connecting part 571 by the inner wall of the connecting part 571 and the rubber ring 573. Due to the recessed design of the first magnetic attraction part 572 and the limitation by the rubber ring 573, the probability of the first magnetic attraction part 572 being hit and the impact force during the hit are reduced. A second magnetic attraction part 512 is provided at the connection port 511. The second magnetic attraction part 512 is pushed into the hole of the fixed pulley bracket 52 by a spring 513 (e.g., using...). Figure 14A In the illustrated embodiment 3, the fixed pulley frame 32 extends to a connection port 511. When the handle 57 needs to be connected to the connection port 511, the notch of the connection part 571 is aligned with the second magnetic part 512. Under the action of the attraction force, the second magnetic part 512 enters the notch of the connection part 571 and is attracted to the first magnetic part 572. The depth of the notch of the connection part 571 is greater than the length of the protrusion of the second magnetic part 512. Therefore, there is a gap between the first magnetic part 572 and the second magnetic part 512 when they are attracted. This gap is preferably controlled at 0.2 mm to avoid collision and damage when the first magnetic part 572 and the second magnetic part 512 are attracted, while maintaining a stable attraction force.

[0058] Furthermore, it should be noted that the shapes and names of the parts and components described in the specific embodiments described in this specification may differ. All equivalent or simple variations made to the structure, features, and principles described in this utility model patent concept are included within the protection scope of this utility model patent. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not deviate from the structure of this utility model or exceed the scope defined in these claims, all of which should fall within the protection scope of this utility model.

Claims

1. A long-stroke telescopic isolation device, comprising a column, a pulley system, a counterweight, and a pull rope, wherein the pulley system, the counterweight, and the pull rope are disposed inside the column, the column is provided with a rope outlet, and the free end of the pull rope extends outside the column through the rope outlet, characterized in that: The pulley system includes a fixed pulley group fixed to the column and a movable pulley group movable to the column. The movable pulley group is located below the fixed pulley group and connected to a counterweight. The number of pulleys in the movable pulley group is X, where X is an integer and X≥2. The number of pulleys in the fixed pulley group is Y, where Y is an integer and X-1≤Y≤X+1. The fixed end of the pull rope is fixed between the fixed pulley group and the movable pulley group. The pull rope alternately passes through the pulleys in the fixed pulley group and the movable pulley group before reaching its free end. The pulleys in the fixed pulley group and / or movable pulley group include a support shaft, an inner ring, an outer ring, and a limiting member. The inner ring is movably connected to the support shaft, the outer ring cooperates with the pull rope and is rotatably connected to the inner ring, and the limiting member cooperates with the inner ring to limit the inner ring at the support shaft.

2. The long-stroke telescopic isolation device according to claim 1, characterized in that: The limiting member is hollow and sleeved on the outside of the support shaft. The limiting member includes a protrusion and a flange. The protrusion cooperates with the inner ring, and the flange is used to position the limiting member.

3. The long-stroke telescopic isolation device according to claim 1, characterized in that: The pulleys in the fixed pulley group and the movable pulley group are arranged vertically. The diameter of the pulleys in the fixed pulley group decreases from top to bottom, while the diameter of the pulleys in the movable pulley group increases from top to bottom. The rope starts from the fixed end and alternately passes around the pulleys in the fixed pulley group and the movable pulley group in order of increasing pulley diameter before reaching the free end.

4. The long-stroke telescopic isolation device according to claim 3, characterized in that: Y=X, and the fixed end of the rope is fixed to the movable pulley block or counterweight.

5. The long-stroke telescopic isolation device according to claim 4, characterized in that: The fixed pulley block also includes a guide rod, which is located on the side away from the rope outlet. The pull rope passes around all the pulleys and then around the guide rod to reach the rope outlet.

6. The long-stroke telescopic isolation device according to claim 1, characterized in that: The pulleys in the fixed pulley group and the movable pulley group are arranged side by side and spaced apart.

7. The long-stroke telescopic isolation device according to any one of claims 1 to 6, characterized in that: The counterweight includes a counterweight block with a slot, and the movable pulley group is disposed in the slot.

8. The long-stroke telescopic isolation device according to claim 1, characterized in that: It also includes a handle, which is connected to the free end of a pull rope. The handle has a connecting part with a notch. The column is provided with a connecting port that mates with the connecting part. The connecting port is provided with a stop block that mates with the notch. The connecting part also includes a channel and a recess. The channel intersects with the notch and allows the stop block to enter. The recess intersects with the channel and allows the stop block to enter.

9. The long-stroke telescopic isolation device according to claim 1, characterized in that: It also includes a handle, the handle being connected to the free end of a pull cord, the handle having a connecting part, the connecting part having a first magnetic attraction part recessed therein, the column having a connecting port, the connecting port having a second magnetic attraction part protruding outward, and the first magnetic attraction part and the second magnetic attraction part having a gap when they are engaged.

10. The long-stroke telescopic isolation device according to claim 8 or 9, characterized in that: The number of connection ports is three, and the rope outlet and connection ports are equally spaced.

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