Constant-force lifting structure applied to display support arm

Abstract

The utility model provides a constant force lifting structure applied to a display support arm, which relates to the technical field of lifters, and comprises a lifting assembly, the lifting assembly comprises a cam, the cam comprises a cam curve and a positive excircle which are overlapped together, and a through hole is arranged between the cam curve and the positive excircle; a traction rope is wound on the cam, bypasses the upper side of the curve of the cam and penetrates through the through hole, and after penetrating through the through hole, the traction rope surrounds the outer ring of the positive outer circle; the end, close to the cam curve, of the traction rope is connected with the tension spring, and the other end, surrounding the positive outer circle, of the traction rope is connected with the lifting base. The utility model has the beneficial effects that as the tensile force multiplied by the arm of force is equal to the moment of force, the moment of force at the two ends of the cam can be kept unchanged, and the two ends of the traction rope are balanced, so that the lifting seat can stably stay at any position, and when the height of the lifting seat needs to be adjusted, only the lifting seat needs to be manually pulled; and when the hand is released, the hand can stay at the position.

Description

Technical Field

[0001] The utility model relates to the technical field of lifters, in particular to a constant force lifting structure applied to a display arm. Background Art

[0002] With the popularization of electronic devices, the lifting function of the monitor arm has become the key to improving user experience. Currently, most monitor arms on the market use constant force springs or gas springs to achieve lifting, but these lifting monitor arms have defects such as large initial operating force and difficult lifting and adjustment. In order to solve the above problems, some lifting monitor arms use motors to control the lifting of the monitor, and the output torque of the motor does not change with the weight of the monitor connected to the monitor arm. In this way, when the user makes an incorrect selection, it will cause damage to the motor and machine connection components, causing the lifting monitor arm to be easily damaged.

[0003] The technical content disclosed in the Chinese patent document (publication number: CN221300673U, patent name: vertical arm lifting mechanism applied to a display mounting seat) is: a vertical arm lifting mechanism applied to a display mounting seat, including a vertical arm, characterized in that the vertical arm is provided with a slide seat which is vertically slidably matched with the vertical arm, and the vertical arm is provided with a synchronous belt mechanism which drives the slide seat to rise and fall, the active synchronous wheel of the synchronous belt mechanism and the output shaft of the reduction motor are connected and pre-tightened through a pre-tightening component, and the active synchronous belt wheel and the output shaft of the reduction motor have rotational damping.

[0004] From the above implementation scheme, it can be seen that the monitor mount uses a motor to control the synchronous wheel and the synchronous belt to achieve the lifting and lowering of the monitor. However, since the torque of the motor does not change with the weight of the monitor to be driven, the use range of the monitor mount is small. Once the user makes a wrong selection, it will become unusable or the motor will be overloaded and damaged. Utility Model Content

[0005] The utility model overcomes the shortcomings of the prior art, and provides a cam, which includes a cam curve and a positive outer circle superimposed together. The two ends of a traction rope are respectively connected to a tension spring and a lifting seat. The distance between the end of the traction rope connected to the lifting seat and the center of the cam circle remains unchanged; the distance between the end of the traction rope connected to the tension spring and the center of the cam circle changes as the distance between the outer side of the cam curve and the center of the cam circle changes; because the pulling force multiplied by the lever arm is equal to the moment, when the weight carried by the lifting seat remains unchanged, the moment of the end of the traction rope connected to the lifting seat relative to the center of the cam circle remains unchanged, and when the traction rope pulls the tension spring so that the tension of the tension spring increases, the distance between the tangent point of the traction rope and the cam curve and the center of the cam circle becomes smaller, and the pulling force The torque at both ends of the cam can be kept constant, so that the two ends of the traction rope can be balanced, so that the lifting seat can stay in that position stably no matter where it is. When the height of the lifting seat needs to be adjusted, you only need to manually pull the lifting seat, and let it stay in that position when you let go. Compared with the traditional method of using a constant force spring or a gas spring to achieve the lifting of the lifting seat, it is more stable.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] A constant force lifting structure applied to a display arm, comprising a lifting assembly, the lifting assembly comprising a cam, the cam comprising a superimposed cam curve and a positive outer circle, a through hole being arranged between the cam curve and the positive outer circle;

[0008] A traction rope is wound around the cam, the traction rope goes around the upper side of the cam curve and passes through the through hole, and then the traction rope goes around the outer ring of the outer circle after passing through the through hole;

[0009] One end of the traction rope close to the cam curve is connected to the tension spring, and the other end of the traction rope after it wraps around the outer circle is connected to the lifting seat;

[0010] When the lifting seat is lifted or lowered, the cam is driven to rotate, and the distance between the end of the traction rope connected to the lifting seat and the center of the cam remains unchanged; the distance between the end of the traction rope connected to the tension spring and the center of the cam changes as the distance between the outer side of the cam curve and the center of the cam changes;

[0011] When the lifting seat descends, the traction rope pulls the tension spring, and the tension of the tension spring on the traction rope increases. At this time, the cam rotates so that the distance between the tangent point of the traction rope and the cam curve and the center of the cam becomes smaller;

[0012] When the lifting seat rises, the towing rope is relaxed, the tension spring retracts, and the pulling force of the tension spring on the towing rope becomes smaller. At this time, the cam rotates, causing the distance between the tangent point of the towing rope and the cam curve and the center of the cam to increase.

[0013] Furthermore, after the towing rope is connected to the tension spring, it is also connected to the strength adjustment bolt. The strength adjustment bolt adjusts the initial tension of the tension spring by adjusting the height of the end of the towing rope.

[0014] Furthermore, one end of the tension spring is connected to the lifting runner seat. A runner is rotatably connected to a position near the upper end of the lifting runner seat, and a second connecting rod is provided at a position near the lower end of the lifting runner seat. One end of the tension spring is hooked at the second connecting rod, and the towing rope extends around the lower end of the runner to the strength adjustment bolt.

[0015] Furthermore, a strength adjustment sliding seat is threadedly connected to the lower end of the strength adjustment bolt, and a first connecting rod is provided at a position near the lower end of the strength adjustment sliding seat.

[0016] Furthermore, the strength adjustment sliding seat is slidably connected in the slide rail assembly. The slide rail assembly includes a slide rail bar. An upper limit member is provided at the upper end of the slide rail bar, an inner slide groove is provided inside the slide rail bar, and side slide blocks are provided on both sides of the strength adjustment sliding seat. The side slide blocks are slidably inserted into the inner slide groove.

[0017] Furthermore, the slide rail assembly is disposed in the base. An upper positioning groove is provided at a position near the upper part of the base. A limit cover is provided on the base, and a limit insertion bar is connected to the lower end of the limit cover. The limit insertion bar is inserted into the positioning groove, and the cam is rotatably connected to the bottom of the positioning groove.

[0018] Furthermore, a sliding insertion positioning groove, an upper limit block, and a lower limit block are provided in the base from top to bottom. The upper limit block is inserted into the sliding insertion positioning groove, and the lifting runner seat slides between the upper limit block and the lower limit block.

[0019] Furthermore, the lifting seat includes a lifting part and a mounting part. Friction blocks and inner pulleys are provided on both sides of the lifting part.

[0020] Furthermore, a towing rope embedding groove is provided at the upper end of the lifting part. The towing rope embedding groove includes a first groove section, a second groove section, a third groove section, and a fourth groove section that are sequentially connected.

[0021] Furthermore, the first groove section is perpendicular to the second groove section, and a towing rope limiting rod is also provided inside the first groove section;

[0022] The second groove section is perpendicular to the third groove section. The fourth groove section is formed by connecting a three-quarter circular arc shape and a straight line segment, and a towing rope pressing plate is threadedly connected to the center of the fourth groove section.

[0023] Compared with the prior art, the beneficial effects of the utility model are:

[0024] 1. A cam is provided, and the cam includes a superimposed cam curve and a positive outer circle. The two ends of the traction rope are respectively connected to the tension spring and the lifting seat. The distance between the end of the traction rope connected to the lifting seat and the center of the cam circle remains unchanged; the distance between the end of the traction rope connected to the tension spring and the center of the cam circle changes with the distance between the outer side of the cam curve and the center of the cam circle; because the pulling force multiplied by the lever arm is equal to the moment, when the weight carried by the lifting seat remains unchanged, the moment of the end of the traction rope connected to the lifting seat relative to the center of the cam circle remains unchanged, and when the traction rope pulls the tension spring so that the tension of the tension spring increases, the distance between the tangent point of the traction rope and the cam curve and the center of the cam circle decreases, then the pulling force increases and the lever arm decreases. , so the torque can be guaranteed to remain unchanged, and when the traction rope is relaxed and the tension spring retracts, the tension of the tension spring on the traction rope becomes smaller. At this time, the cam rotates so that the distance between the tangent point of the traction rope and the cam curve and the center of the cam becomes larger. At this time, the pulling force becomes smaller and the lever arm becomes larger, so the torque remains unchanged, thereby keeping the torque at both ends of the cam unchanged, so that the two ends of the traction rope are balanced, so that the lifting seat can stay stably in any position no matter where it is. When the height of the lifting seat needs to be adjusted, you only need to manually pull the lifting seat, and let it stay in this position when you let go. Compared with the traditional use of constant force springs or gas springs to achieve the lifting of the lifting seat, it is more stable.

[0025] 2. A strength adjustment bolt is provided. When the weight of the item carried by the lifting seat increases, the strength adjustment bolt can be adjusted so that the strength adjustment bolt lengthens the tension spring, thereby increasing the initial tension of the tension spring on the traction rope to match the weight of the carried item. When the weight of the carried item decreases, the strength adjustment bolt can be adjusted so that the strength adjustment bolt is loosened, thereby decreasing the initial tension of the spring on the traction rope. Therefore, when the weight of the carried item changes, it is only necessary to adjust the stretching stroke of the tension spring by adjusting the strength adjustment bolt. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide a further understanding of the utility model and are used together with the embodiments of the utility model to explain the utility model, but do not constitute a limitation of the utility model. In the accompanying drawings:

[0027] Figure 1 It is a general schematic diagram of the lifting structure of an embodiment of the utility model;

[0028] Figure 2 It is a first exploded schematic diagram of the lifting structure of an embodiment of the utility model;

[0029] Figure 3 is a cross-sectional view of the lifting structure of an embodiment of the utility model;

[0030] Figure 4It is the second explosion schematic diagram of the lifting structure of the embodiment of the present utility model;

[0031] Figure 5 It is the mechanism schematic diagram of the base of the embodiment of the present utility model;

[0032] Figure 6 It is the explosion schematic diagram of the slide rail assembly and the lifting seat of the embodiment of the present utility model;

[0033] Figure 7 It is the structural schematic diagram of the lifting part of the embodiment of the present utility model;

[0034] Figure 8 It is the structural schematic diagram of the lifting assembly of the embodiment of the present utility model;

[0035] Figure 9 It is the schematic diagram of the cam structure.

[0036] In the figure: 1. Base; 101. Upper positioning groove; 102. Slide insertion positioning groove; 103. Upper limit block; 104. Lower limit block; 2. Limit cover; 201. Limit deepening strip; 3. Lifting assembly; 301. Strength adjustment bolt; 302. Strength adjustment slide seat; 3021. Side slider; 3022. First connecting rod; 303. Lifting runner seat; 304. Second connecting rod; 305. Runner; 306. Tension spring; 307. Third connecting rod; 308. Traction rope; 309. Cam; 3091. Cam curve; 3092. Perforation; 3093. Positive outer circle; 4. Slide rail assembly; 401. Slide rail bar; 4011. Inner chute; 402. Upper limit member; 5. Lifting seat; 501. Lifting part; 5011. Friction block; 5012. Inner pulley; 5013. Traction rope embedding groove; 50131. First groove section; 50132. Second groove section; 50133. Third groove section; 50134. Fourth groove section; 5014. Traction rope limiting rod; 502. Installation part; 503. Traction rope pressing plate. Specific embodiments

[0037] The following is a description of the preferred embodiments of the utility model with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the utility model, and are not intended to limit the utility model.

[0038] As Figures 1 to 9As shown, a constant force lifting structure applied to a display arm includes a lifting assembly 3, the lifting assembly 3 includes a cam 309, the cam 309 includes a cam curve 3091 and a positive outer circle 3093 superimposed on each other, and a through hole 3092 is provided between the cam curve 3091 and the positive outer circle 3093; a traction rope 308 is wound around the cam 309, the traction rope 308 bypasses the upper side of the cam curve 3091 and passes through the through hole 3092, and the traction rope 308 passes through the through hole 3092 and then surrounds the outer circle of the positive outer circle 3093; one end of the traction rope 308 close to the cam curve 3091 is connected to the tension spring 306, and the other end of the traction rope 308 after surrounding the positive outer circle 3093 is connected to the lifting seat 5; as shown Figure 8 As shown, the tangent point between the side of the traction rope 308 connected to the tension spring 306 and the cam curve 3091 is A, and the distance L1 from point A to the center of the cam 309 changes with the rotation of the cam 309, so when the cam 309 rotates, the force arm size of the side of the traction rope 308 connected to the tension spring 306 can be changed; and the tangent point between the side of the traction rope 308 connected to the lifting seat 5 and the cam curve 3091 is B, and the distance L2 from point B to the center of the cam 309 is unchanged with the rotation of the cam 309, so L2 is constant, and when the weight of the display connected to the lifting seat 5 remains unchanged, the torque of the traction rope 308 at point B remains unchanged.

[0039] When the lifting seat 5 is lifted or lowered, the cam 309 is driven to rotate, and the distance between one end of the traction rope 308 connected to the lifting seat 5 and the center of the cam 309 remains unchanged; the distance between one end of the traction rope 308 connected to the tension spring 306 and the center of the cam 309 changes as the distance between the outer side of the cam curve 3091 and the center of the cam 309 changes.

[0040] When the lifting seat 5 descends, the traction rope 308 pulls the tension spring 306, and the tension of the tension spring 306 on the traction rope 308 increases. At this time, the cam 309 rotates to reduce L1; at this time, the tension increases and the lever arm decreases, so the torque can be guaranteed to remain unchanged.

[0041] When the lifting seat 5 rises, the traction rope 308 is relaxed, and the tension spring 306 is retracted, and the tension of the tension spring 306 on the traction rope 308 becomes smaller. At this time, the cam 309 rotates to increase L1; at this time, the tension becomes smaller and the lever arm becomes larger, so the torque remains unchanged.

[0042] Since the torque on both sides of the cam 309 is constant, the two ends of the traction rope 308 are balanced, so that the lifting seat 5 can stay stably in any position no matter where it is. When the height of the lifting seat 5 needs to be adjusted, it only needs to be manually pulled. When letting go, it can stay in the position. Compared with the traditional method of using a constant force spring or a gas spring to realize the lifting of the lifting seat 5, it is more stable.

[0043] In this embodiment, the towing rope 308 is an aramid rope. The aramid rope is a synthetic fiber rope with high strength and low elongation, and has excellent wear resistance and tensile strength. In this technical solution, the aramid rope connects the tension spring 306, the cam 309 and the lifting seat 5. A display can be connected to the lifting seat 5. The aramid rope, as a force transmission medium, ensures the stable transmission of force and the reliability of the system.

[0044] After the towing rope 308 is connected to the tension spring 306, it is also connected to the strength adjustment bolt 301. The strength adjustment bolt 301 adjusts the initial tension of the tension spring 306 by adjusting the height of the end of the towing rope 308. One end of the tension spring 306 is connected to the lifting runner seat 303. A runner 305 is rotatably connected to a position near the upper end of the lifting runner seat 303. A second connecting rod 304 is provided at a position near the lower end of the lifting runner seat 303. One end of the tension spring 306 is hooked at the second connecting rod 304. The towing rope 308 extends around the lower end of the runner 305 to the strength adjustment bolt 301. The lower end of the strength adjustment bolt 301 is threadedly connected to a strength adjustment sliding seat 302. A first connecting rod 3022 is provided at a position near the lower end of the strength adjustment sliding seat 302. The end of the towing rope 308 is connected to the first connecting rod 3022. Therefore, when the strength adjustment bolt 301 rotates, it can pull the strength adjustment sliding seat 302 upward or push it downward. When the strength adjustment bolt 301 rotates to pull the strength adjustment sliding seat 302 upward, one end of the towing rope 308 will also be pulled upward, and the towing rope 308 will also stretch the tension spring 306. The longer the tension spring 306 is stretched, the greater its retraction force will be. When the strength adjustment bolt 301 rotates to push the strength adjustment sliding seat 302 downward, one end of the towing rope 308 will be loosened downward, and the tension spring 306 will retract accordingly. After the tension spring 306 retracts, its retraction force will become smaller. Therefore, adjusting the strength adjustment bolt 301 can adjust the initial tension of the tension spring 306. Therefore, when the weight of the loaded item changes, only the stretching stroke of the tension spring by adjusting the strength adjustment bolt 301 is required. The design of the strength adjustment bolt 301 enables the constant-force lifting structure to adapt to monitors of different weights, making the adaptability of the constant-force lifting structure wide.

[0045] The intensity adjustment slider 302 is slidably connected to the slide rail assembly 4. The slide rail assembly 4 includes a slide rail bar 401. An upper limit member 402 is provided at the upper end of the slide rail bar 401. The upper limit block 402 can prevent the intensity adjustment slider 302 from disengaging from the slide rail assembly 4. An inner chute 4011 is provided inside the slide rail bar 401. Side sliders 3021 are provided on both sides of the intensity adjustment slider 302. The side sliders 3021 are slidably inserted into the inner chute 4011. The slide rail assembly 4 is arranged in the base 1. An upper positioning groove 101 is provided at a position near the upper part of the base 1. A limit cover 2 is provided on the base 1. A limit insertion bar 201 is connected to the lower end of the limit cover 2. The limit insertion bar 201 is inserted into the positioning groove 101. The cam 309 is rotatably connected to the bottom of the positioning groove 101. The limit insertion bar 201 defines the connection position of the cam 309 and the positioning groove 101, so that the cam 309 will not disengage from the positioning groove 101. And when maintenance or replacement of parts is required, only the limit cover 2 needs to be opened, then the cam 309 can be taken out, which is convenient and fast.

[0046] Inside the base 1, a sliding insertion positioning groove 102, an upper limit block 103 and a lower limit block 104 are provided from top to bottom. The upper limit block 103 is inserted into the sliding insertion positioning groove 102. The lifting runner seat 303 slides between the upper limit block 103 and the lower limit block 104. Therefore, the movement of the lifting runner seat 303 is restricted, and this also makes the tension spring 306 can only be stretched within a certain range, preventing the tension spring 306 from being overstretched and damaged.

[0047] The lifting seat 5 includes a lifting part 501 and a mounting part 502. Friction blocks 5011 and inner pulleys 5012 are provided on both sides of the lifting part 501. The inner pulleys 5012 make the lifting part 501 move more smoothly inside the base 1. The friction blocks 5011 increase the friction between the lifting seat 5 and the inside of the base 1, making the positioning of the display more stable.

[0048] At the upper end of the lifting part 501, there is a traction rope embedded groove 5013. The traction rope embedded groove 5013 includes a first groove section 50131, a second groove section 50132, a third groove section 50133, and a fourth groove section 50134 that are connected in sequence. The first groove section 50131 is perpendicular to the second groove section 50132. Inside the first groove section 50131, there is also a traction rope limiting rod 5014. The traction rope limiting rod 5014 can make the traction rope 308 fit against the inner wall of the first groove section 50131. The second groove section 50132 is perpendicular to the third groove section 50133. The fourth groove section 50134 is formed by connecting a three-quarter circular arc shape and a straight line segment. At the center of the fourth groove section 50134, there is a traction rope pressing plate 503 connected by threads. When the traction rope 308 is connected to the lifting part 501, it is embedded in the traction rope embedded groove 5013. The traction rope pressing plate 503 prevents the traction rope 308 from falling off the traction rope embedded groove 5013, so that the traction rope 308 and the lifting part 501 are better fixed together.

[0049] Finally, it should be noted that the above are only the preferred embodiments of the utility model and are not used to limit the utility model. Although the utility model has been described in detail with reference to the embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. However, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the utility model shall be included within the protection scope of the utility model.

Claims

1. A constant-force lifting structure applied to a monitor arm, characterized in that It includes a lifting component (3), and the lifting component (3) includes a cam (309). The cam (309) includes a cam curve (3091) and a positive outer circle (3093) stacked together. A perforation (3092) is provided between the cam curve (3091) and the positive outer circle (3093). A traction rope (308) is wound around the cam (309). The traction rope (308) bypasses the upper side of the cam curve (3091) and passes through the perforation (3092). After passing through the perforation (3092), the traction rope (308) surrounds the outer circle of the positive outer circle (3093). One end of the traction rope (308) close to the cam curve (3091) is connected to a tension spring (306), and the other end of the traction rope (308) after surrounding the positive outer circle (3093) is connected to a lifting seat (5). When the lifting seat (5) moves up and down, it drives the cam (309) to rotate. The distance between the end of the traction rope (308) connected to the lifting seat (5) and the center of the cam (309) remains unchanged. The distance between the end of the traction rope (308) connected to the tension spring (306) and the center of the cam (309) changes as the distance between the outer side of the cam curve (3091) and the center of the cam (309) changes. When the lifting seat (5) descends, the traction rope (308) pulls the tension spring (306) open, and the tension of the tension spring (306) on the traction rope (308) becomes larger. At this time, the cam (309) rotates so that the distance between the tangent point of the traction rope (308) and the cam curve (3091) and the center of the cam (309) becomes smaller. When the lifting seat (5) ascends, the traction rope (308) is relaxed, the tension spring (306) retracts, and the tension of the tension spring (306) on the traction rope (308) becomes smaller. At this time, the cam (309) rotates so that the distance between the tangent point of the traction rope (308) and the cam curve (3091) and the center of the cam (309) becomes larger.

2. The constant-force lifting structure applied to the monitor arm according to claim 1, wherein After the traction rope (308) is connected to the tension spring (306), it is also connected to a strength adjustment bolt (301). The strength adjustment bolt (301) adjusts the initial tension of the tension spring (306) by adjusting the height of the end of the traction rope (308).

3. The constant-force lifting structure applied to the monitor arm according to claim 2, wherein One end of the tension spring (306) is connected to a lifting runner seat (303). A runner (305) is rotatably connected to a position near the upper end of the lifting runner seat (303). A second connecting rod (304) is provided at a position near the lower end of the lifting runner seat (303). One end of the tension spring (306) is hooked at the second connecting rod (304). The traction rope (308) bypasses the lower end of the runner (305) and extends to the strength adjustment bolt (301).

4. The constant-force lifting structure applied to a monitor arm according to claim 3, wherein, The lower end of the strength adjustment bolt (301) is threadedly connected to a strength adjustment sliding seat (302). A first connecting rod (3022) is provided at a position near the lower end of the strength adjustment sliding seat (302).

5. The constant-force lifting structure applied to a monitor arm according to claim 4, characterized in that, The intensity adjustment sliding seat (302) is slidably connected to the slide rail assembly (4). The slide rail assembly (4) includes a slide rail bar (401). An upper limit member (402) is provided at the upper end of the slide rail bar (401). An inner slide groove (4011) is provided inside the slide rail bar (401). Side sliders (3021) are provided on both sides of the intensity adjustment sliding seat (302), and the side sliders (3021) are slidably inserted into the inner slide groove (4011).

6. The constant-force lifting structure applied to the monitor arm according to claim 5, characterized in that, The slide rail assembly (4) is disposed in the base (1). An upper positioning groove (101) is provided at a position near the upper part of the base (1). A limit cover (2) is provided on the base (1). A limit insertion bar (201) is connected to the lower end of the limit cover (2), and the limit insertion bar (201) is inserted into the positioning groove (101). The cam (309) is rotatably connected to the bottom of the positioning groove (101).

7. The constant-force lifting structure applied to a monitor arm according to claim 6, wherein, A sliding insertion positioning groove (102), an upper limit block (103), and a lower limit block (104) are provided in the base (1) from top to bottom. The upper limit block (103) is inserted into the sliding insertion positioning groove (102), and the lifting runner seat (303) slides between the upper limit block (103) and the lower limit block (104).

8. The constant-force lifting structure applied to a monitor arm according to any one of claims 1 to 7, characterized in that, The lifting seat (5) includes a lifting part (501) and a mounting part (502). Friction blocks (5011) and inner pulleys (5012) are provided on both sides of the lifting part (501).

9. The constant-force lifting structure applied to the monitor arm according to claim 8, characterized in that A traction rope embedded groove (5013) is provided at the upper end of the lifting part (501). The traction rope embedded groove (5013) includes a first groove section (50131), a second groove section (50132), a third groove section (50133), and a fourth groove section (50134) that are sequentially connected.

10. The constant-force lifting structure applied to the monitor arm according to claim 9, characterized in that, The first groove section (50131) is perpendicular to the second groove section (50132), and a traction rope limiting rod (5014) is further provided inside the first groove section (50131); the second groove section (50132) is perpendicular to the third groove section (50133). The fourth groove section (50134) is formed by connecting a three-quarter arc shape and a straight line segment, and a traction rope pressing plate (503) is threadedly connected to the center of the fourth groove section (50134).

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