A sliding rail structure with free lifting and hovering and an application terminal

Abstract

The present invention discloses a sliding rail structure capable of freely lifting and hovering, comprising: an outer shell and an inner shell; the outer shell is slidably arranged on the outside of the inner shell, gravity pulling spring assemblies are respectively arranged on both sides inside the inner shell, one end of each gravity pulling spring assembly is connected to the inner shell, and the other end passes through the inner shell and is connected to the outer shell. A braking bracket, a braking pulling spring and a braking straight rod are movably arranged in the middle of the inner shell. With the above design, the restoring force generated when the gravity pulling spring assemblies and the braking pulling spring are subjected to pulling force is used to offset the gravity of the terminal, and at the same time, the resistance generated by the contact between the braking bracket and the braking slide rail is used to offset the restoring force generated by the gravity pulling spring assemblies and the braking pulling spring, forming a balance, thereby realizing hovering at any position. The terminal can hover arbitrarily in a pure mechanical manner, and the volume of the structure can be adjusted according to the size of the application terminal, without being limited by energy, with a wide application range, low cost, and the lifting speed can be arbitrarily controlled, improving the user experience.

Description

Technical Field

[0001] The present invention relates to the technical field of lifting structures, and particularly to a sliding rail structure capable of freely lifting and hovering and an application terminal. Background Art

[0002] Lifting structures are mainly used to enable the devices applying such lifting structures to move relatively up or down for convenient use. There are many existing structures capable of realizing lifting, and commonly used ones include lead screws, racks, belts, etc. Such structures can achieve precise and controllable height lifting through cooperation with motors, with electrical control and high automation degree, which can effectively reduce manual labor. Also, due to the electrified method, it involves control, so the setting cost of such methods is relatively high. If used in places with low requirements for precision control, such as classroom blackboards in schools, commercial displays, etc., it is undoubtedly a waste of resources. Moreover, electrical control requires a stable power supply to ensure the normal operation of the equipment. If there is a power outage, the situation of being unable to lift will occur, bringing a negative experience to users. In the prior art, there are also ways to achieve lifting by using a pure mechanical structure. For example, in Chinese Patent, Patent No. CN202221884901.8 (a constant force lifting bracket) includes a fixed bracket and a lifting sliding seat, and the lifting sliding seat is slidably connected to the fixed bracket up and down. Its characteristics are that a runner and a movable block are provided on the fixed bracket, a cam is provided on one side side wall of the runner, the movable block is connected to the lifting sliding seat through a pull rope that sequentially bypasses the cam and the runner, a pressure spring is sleeved on the end of the pull rope close to the movable block, the upper end of the pressure spring abuts against the fixed bracket, the lower end of the pressure spring abuts against the movable block, and an elastic force adjusting component is provided on the fixed bracket. The elastic force adjusting component includes a lifting block and an adjusting screw. The adjusting screw extends vertically and is rotatably connected to the fixed bracket. The threaded section of the adjusting screw is threadedly connected to the lifting block, and the upper end of the pressure spring abuts against the lifting block. The present invention can realize the height adjustment of the display screen and enable the screen to hover at any height, making it more convenient to use. According to its specification and attachments Figure 1 It can be known from the record that the defect of this method is that one end of the pull rope inside is connected to the lifting sliding seat. When the lifting sliding seat is connected to the display, under the influence of the gravity of the display and the restoring pulling force of the pressure spring, the lifting sliding seat will tilt to one side, resulting in the situation where the diagonal of the lifting sliding seat squeezes the steel ball sliding rail, so that the problem of unsmooth lifting due to the resistance generated by diagonal friction during rising or falling occurs.

[0003] Therefore, it is urgent to design a sliding rail structure capable of freely lifting and hovering and an application terminal to overcome one or more of the above-mentioned deficiencies of the prior art. Summary of the Invention

[0004] The technical solution adopted by the present invention to achieve the above technical purpose is as follows: A sliding rail structure capable of freely lifting and hovering, characterized in that it includes: a housing and an inner housing; the housing is slidably arranged outside the inner housing, gravity pulling spring assemblies are respectively arranged on both sides inside the inner housing, one end of each gravity pulling spring assembly is connected to the inner housing, and the other end passes through the inner housing and is connected to the housing. A braking assembly is movably arranged in the middle of the inner housing, and the braking assembly includes: a braking bracket, a braking pulling spring, and a braking straight rod; the braking bracket is diamond-shaped. When the upper end and the lower end of the braking bracket contract towards opposite directions, the left side and the right side of the braking bracket expand towards opposite directions respectively. A braking pulling spring is arranged inside the braking bracket, the bottom of the braking pulling spring is connected to the bottom of the braking bracket, the top of the braking pulling spring is connected to the top side wall of the inner housing. The upper end of the braking bracket is connected to a braking straight rod, and the bottom of the braking straight rod passes through the inner housing and is connected to the housing. Serpentine braking sliding rails are respectively arranged on both sides of the inner housing, the braking sliding rails are located on both sides of the braking bracket. When the braking straight rod makes a movement of extending or retracting relative to the inner housing as the housing slides, when the braking straight rod makes an extending movement, the braking bracket moves inside the inner housing under the pulling force of the braking straight rod, and at the same time stretches the braking pulling spring, generating a restoring force and cooperating with the pulling force of the braking straight rod to squeeze the braking bracket, and the left side and the right side of the braking bracket expand outwards and respectively contact the corresponding side braking sliding rails.

[0005] In a preferred embodiment, the gravity pulling spring assembly includes: a gravity bolt, the gravity bolt penetrates through the top of the inner housing, a gravity connecting piece is threadedly connected to the end of the gravity bolt penetrating into the inner housing, the gravity connecting piece is fixedly connected with a gravity pulling spring, and the end of the gravity pulling spring away from the gravity connecting piece passes through the inner housing and is fixedly connected to the bottom of the housing.

[0006] In a preferred embodiment, the braking bracket includes: a first connecting rod, a second connecting rod, a third connecting rod, and a fourth connecting rod; one end of the first connecting rod is rotatably connected to one end of the second connecting rod, the end of the first connecting rod away from the second connecting rod is rotatably connected to the third connecting rod, the end of the second connecting rod away from the first connecting rod is rotatably connected to the fourth connecting rod, the end of the third connecting rod away from the first connecting rod is rotatably connected to the end of the fourth connecting rod away from the third connecting rod, one end of the braking straight rod is fixedly connected to the connection end of the first connecting rod and the second connecting rod, and the other end of the braking straight rod passes through the connection end of the third connecting rod and the fourth connecting rod.

[0007] In a preferred embodiment, rollers are rotatably connected to the connection ends of the first link and the third link and the connection ends of the second link and the fourth link respectively. The middle of the roller is concave, and the roller is matched with the braking slide rail.

[0008] In a preferred embodiment, a tension spring connecting piece is fixedly provided at the lower end of the braking bracket. The braking straight rod passes through the tension spring connecting piece. There are two braking tension springs, which are respectively located on both sides of the braking straight rod, and the bottom of the braking tension spring is fixedly connected to the tension spring connecting piece.

[0009] In a preferred embodiment, the two braking slide rails are symmetrically arranged. Each braking slide rail includes: a first section, a second section, and a third section; the second sections of the two braking slide rails are bent toward the direction of the symmetry line respectively, and the first sections and the third sections of the two braking slide rails extend obliquely away from the symmetry line respectively.

[0010] In a preferred embodiment, at least a pair of spaced limiting pulleys are provided in the middle of one side of the inner shell, and a vertical limiting plate is further connected to the bottom of the outer shell. The limiting plate is located between the pair of limiting pulleys.

[0011] Another aspect of the present invention provides an application terminal, which is characterized in that the application terminal includes: a terminal and a lifting slide rail structure fixedly connected to the terminal, and the lifting slide rail structure is the freely lifting and hovering slide rail structure described in any one of the above embodiments.

[0012] In a preferred embodiment, it further includes: a support frame, the support frame is fixedly connected to the inner shell of the lifting slide rail structure, and the terminal is fixedly connected to the outer shell of the lifting slide rail structure.

[0013] The beneficial effects of the present invention are: the restoring force generated when the gravity tension spring assembly and the braking tension spring are subjected to tension is used to offset the gravity of the terminal, and at the same time, the resistance generated by the contact between the braking bracket and the braking slide rail with a specific shape is used to offset the restoring force generated by the gravity tension spring assembly and the braking tension spring in any form, forming a balance, thereby realizing hovering at any position. This structure realizes the hovering of the terminal at any position in a pure mechanical manner, and the volume of the structure can be adjusted according to the size of the application terminal. At the same time, it is not limited by energy and can be used in any environment, with a wide range of applications, low cost, and the lifting speed can be arbitrarily controlled, improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the present invention;

[0015] Figure 2 is an exploded view of the present invention;

[0016] Figure 3 Explosion diagram of the braking component of the present invention;

[0017] Figure 4 Structural schematic diagram of the braking slide rail of the present invention;

[0018] Figure 5 Schematic diagram of the usage state of the present invention;

[0019] Figure 6 Structural schematic diagram of the second embodiment of the present invention.

[0020] In the figure:

[0021] 10. Outer shell; 101. Limiting plate; 11. Inner shell; 12. Gravity spring assembly; 121. Gravity bolt; 122. Gravity spring; 123. Gravity connecting piece; 13. Braking component; 131. Braking bracket; 1311. First connecting rod; 1312. Second connecting rod; 1313. Third connecting rod; 1314. Fourth connecting rod; 1315. Roller; 1316; Spring connecting piece; 132. Braking spring; 133. Braking straight rod; 134. Braking slide rail; 1341. First section; 1342. Second section; 1343. Third section; 14. Terminal; 15. Support frame. Detailed implementation manners

[0022] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the following will describe the detailed implementation manners of the present invention with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0023] Such as Figures 1 - 5As shown in the figure, the present invention provides a slide rail structure capable of freely lifting and hovering, which is characterized by comprising: an outer shell 10 and an inner shell 11; the outer shell 10 is slidably arranged outside the inner shell 11, gravity tension spring assemblies 12 are respectively arranged inside both sides of the inner shell 11, one end of each gravity tension spring assembly 12 is connected to the inner shell 11, and the other end passes through the inner shell 11 and is connected to the outer shell 10. A braking assembly 13 is movably arranged in the middle of the inner shell 11, and the braking assembly 13 includes: a braking bracket 131, a braking tension spring 132, and a braking straight rod 133; the braking bracket 131 is in a rhombus shape. When the upper end and the lower end of the braking bracket 131 contract towards opposite directions, the left side and the right side of the braking bracket 131 expand towards opposite directions respectively. A braking tension spring 132 is arranged inside the braking bracket 131, the bottom of the braking tension spring 132 is connected to the bottom of the braking bracket 131, the top of the braking tension spring 132 is connected to the top side wall of the inner shell 11. The upper end of the braking bracket 131 is connected to a braking straight rod 133, the bottom of the braking straight rod 133 passes through the inner shell 11 and is connected to the outer shell 10. Serpentine braking slide rails 134 are respectively arranged on both sides of the inner shell 11, the braking slide rails 134 are located on both sides of the braking bracket 131. The braking straight rod 133 makes a movement of extending or retracting relative to the inner shell 11 as the outer shell 10 slides. When the braking straight rod 133 makes an extending movement, the braking bracket 131 moves inside the inner shell 11 under the pulling force of the braking straight rod 133, and simultaneously stretches the braking tension spring 132 to generate a restoring force, which cooperates with the pulling force of the braking straight rod 133 to squeeze the braking bracket 131, and the left side and the right side of the braking bracket 131 expand outwards and respectively contact the corresponding side of the braking slide rail 134;

[0024] Specifically, the outer shell 10 is in a "C" shape. The outer shell 10 is slidably sleeved outside the inner shell 11 in a manner of cooperation between a slide rail and a pulley. The outer shell 10 can slide up and down relative to the inner shell 11. In an actual application environment, an external object is fixedly connected to the outer shell 10 and rises and falls as the outer shell 10 slides. The gravity spring assembly 12 is used to generate a restoring force when being stretched, so as to offset the gravity generated by the external object through the generated restoring force. There are two gravity spring assemblies 12, which are respectively located on both sides of the inner shell 11 to avoid tilting caused by unilateral force. The braking assembly 13 is used to generate frictional force to offset the restoring force acting on the outer shell 10 when the gravity spring 122 is pulled, so that the outer shell 10 can hover at any position during sliding. The braking slide rail 134 is used to contact and cooperate with the braking assembly 13 to generate frictional force between the braking assembly 13 and the braking slide rail 134. Among them, the braking assembly 13 can move inside the inner shell 11. The braking assembly 13 includes a rhombic braking bracket 131. The upper end of the middle part of the braking bracket 131 is fixedly connected with a braking straight rod 133. The bottom end of the braking straight rod 133 passes through the inner shell 11 and is fixedly connected with the bottom wall of the outer shell 10. When the outer shell 10 slides relative to the inner shell 11, it drives the braking straight rod 133 to extend or retract from the inner shell 11. At the same time, the braking straight rod 133 drives the braking bracket 131 to move synchronously inside the inner shell 11. A braking spring 132 is also connected inside the braking bracket 131. The bottom end of the braking spring 132 is fixedly connected with the lower end of the middle part of the braking bracket 131. The top of the braking spring 132 is fixedly connected with the top side wall of the inner shell 11. When the braking straight rod 133 is driven by the outer shell 10 to extend out of the inner shell 11, it synchronously pulls the braking bracket 131 to move downward inside the inner shell 11. The braking bracket 131 stretches the braking spring 132. The braking spring 132 generates a restoring force acting on the lower end of the braking bracket 131, so that the braking bracket 131 moves upward under the action of the braking spring 132. At this time, the braking bracket 131 is subjected to the pulling force of the upper braking pull rod and the restoring force of the lower braking spring 132. The braking bracket 131 is squeezed by the forces in two directions, so that the upper end and the lower end of the braking bracket 131 contract in opposite directions, and the left side and the right side of the braking bracket 131 move left and right respectively under the squeezing force and contact the braking slide rails 134 located on both sides of the braking bracket 131, generating resistance. This resistance offsets the restoring forces generated when the braking spring 132 and the gravity spring assembly 12 are stretched. The restoring forces generated by the braking spring 132 and the gravity spring assembly 12 offset the gravity of the external object, forming a balance and realizing hovering. Among them, because the left side and the right side of the braking bracket 131 will be farther and farther away under the squeezing of the upper end and the lower end, in order to enable the braking slide rail 134 to stably cooperate with the braking bracket 131, the braking slide rail 134 is in a snake shape, that is, consistent with the expanding trajectory of the left and right sides of the braking bracket 131, ensuring that the braking bracket 131 can contact the braking slide rail 134 as long as the left and right sides are in an expanded state, realizing hovering at any position.

[0025] Further, in this embodiment, the gravity tension spring assembly 12 includes: a gravity bolt 121, the gravity bolt 121 is disposed through the top of the inner shell 11, a gravity connecting member 123 is threadedly connected to one end of the gravity bolt 121 that penetrates into the inner shell 11, the gravity connecting member 123 is fixedly connected to a gravity tension spring 122, and one end of the gravity tension spring 122 away from the gravity connecting member 123 penetrates out of the inner shell 11 and is fixedly connected to the bottom of the outer shell 10. Specifically, one end of the gravity bolt 121 penetrates into the top of the inner shell 11, and the gravity connecting member 123 is threadedly connected to the gravity bolt 121, so that the gravity connecting member 123 can adjust its position on the gravity bolt 121, thereby adjusting the initial force of the gravity tension spring 122. This adjustment can be made in a matching manner according to the weight of external items.

[0026] Further, in this embodiment, the brake bracket 131 includes: a first link 1311, a second link 1312, a third link 1313, and a fourth link 1314; one end of the first link 1311 is rotatably connected to one end of the second link 1312, the end of the first link 1311 away from the second link 1312 is rotatably connected to the third link 1313, the end of the second link 1312 away from the first link 1311 is rotatably connected to the fourth link 1314, the end of the third link 1313 away from the first link 1311 is rotatably connected to the end of the fourth link 1314 away from the third link 1313, one end of the brake straight rod 133 is fixedly connected to the connection end of the first link 1311 and the second link 1312, and the other end of the brake straight rod 133 passes through the connection end of the third link 1313 and the fourth link 1314. Specifically, the four links are connected to form a shape that is a rhombus in the initial state. One end of the brake straight rod 133 is fixedly connected to the connection end of the first link 1311 and the second link 1312, and the other end of the brake straight rod 133 passes through the connection end of the third link 1313 and the fourth link 1314, and the third link 1313 and the fourth link 1314 can slide relative to the brake straight rod 133, so that the lower end of the brake bracket 131 can contract toward the direction where the upper end is located under the pulling force of the brake tension spring 132.

[0027] Further, in this embodiment, rollers 1315 are rotatably connected to the connection ends of the first link 1311 and the third link 1313 and the connection ends of the second link 1312 and the fourth link 1314 respectively. The middle part of the roller 1315 is concave, and the roller 1315 is matched with the brake slide rail 134. Specifically, through the arrangement of the roller 1315, the cooperation between the brake bracket 131 and the brake slide rail 134 is a rolling cooperation, reducing the wear when the brake bracket 131 and the brake slide rail 134 are in contact friction, making the sliding smoother and more labor-saving.

[0028] Further, in this embodiment, a spring connecting member 1316 is fixedly provided at the lower end of the brake bracket 131. The brake straight rod 133 passes through the spring connecting member 1316. Two brake tension springs 132 are provided, respectively located on both sides of the brake straight rod 133, and the bottom of the brake tension spring 132 is fixedly connected to the spring connecting member 1316. Specifically, the spring connecting member 1316 is used for fixedly connecting with the brake tension spring 132. Two brake tension springs 132 are provided on both sides of the brake straight rod 133 to balance the tension on both sides and avoid the situation of unilateral force.

[0029] It should be noted that the top of the brake tension spring 132 is connected to the top of the inner shell 11 by bolts, so that the initial force of the brake tension spring 132 can be adjusted according to the use requirements.

[0030] Furthermore, in this embodiment, the two braking slide rails 134 are symmetrically arranged. Each braking slide rail 134 includes: a first section 1341, a second section 1342, and a third section 1343. The second sections 1342 of the two braking slide rails 134 are respectively bent toward the direction of the symmetry line. The first sections 1341 and the third sections 1343 of the two braking slide rails 134 are respectively inclined and extended away from the symmetry line. Specifically, each braking slide rail 134 is divided into three sections. The second sections 1342 of the two braking slide rails 134 are respectively bent in opposite directions. The third sections 1343 of the two braking slide rails 134 are in a horn shape that narrows from bottom to top. The trajectory of the third section 1343 is consistent with the trajectory when the two sides of the braking bracket 131 contract or expand. The two first sections 1341 of the braking slide rail 134 are respectively inclined and extended away from the symmetry line. The length of the first section 1341 is less than the length of the third section 1343. When the braking bracket 131 is within the range of the second section 1342, after losing the external pulling force, due to the shape of the second section 1342 and the first section 1341 expanding from bottom to top, the braking bracket 131 will rise on its own under the pulling force of the gravity spring assembly 12 and the braking spring 132 after rising into the second section 1342 and losing the restriction of the braking slide rail 134 until the limit position. Due to the structural design of the third section 1343, when the braking bracket 131 slides and rises within this section, the braking slide rail 134 will generate a force that squeezes both sides of the braking bracket 131, and this force is offset by the outward expanding force generated by the pulling force of the braking spring 132, thereby realizing hovering at any position.

[0031] Furthermore, in this embodiment, at least a pair of spaced limiting pulleys (not shown in the figure) are provided in the middle of one side of the inner shell 11. A vertical limiting plate 101 is further connected to the bottom of the outer shell 10. The limiting plate 101 is located between the pair of limiting pulleys. Specifically, the cooperation of the limiting pulleys and the limiting plate 101 enables the outer shell 10 to be restricted by the limiting pulleys when sliding and will not deviate to both sides, but can only move straight up and down.

[0032] On the other hand, the present invention provides an application terminal 14, as Figure 6 shown. The application terminal 14 includes: a terminal 14 and a lifting slide rail structure fixedly connected to the terminal 14. The lifting slide rail structure is the free-lifting and hovering slide rail structure described in any one of the above embodiments. Specifically, the terminal 14 can be a display, a classroom blackboard, a whiteboard, a display board, or the like.

[0033] Further, in this embodiment, it further includes: a support frame 15, the support frame 15 is fixedly connected to the inner shell 11 of the lifting slide rail structure, and the terminal 14 is fixedly connected to the outer shell 10 of the lifting slide rail structure. Specifically, the support frame 15 is used to provide a supporting effect. The support frame 15 is fixedly connected to the inner shell 11 of the lifting slide rail structure through a wall-mounted bracket, and the terminal 14 is fixedly connected to the outer shell 10 of the lifting slide rail structure through a wall-mounted bracket. When the outer shell 10 slides relative to the inner shell 11, the terminal 14 is driven to rise or fall, and can hover at any position.

[0034] In summary, the present invention uses the restoring force generated when the gravity spring assembly 12 and the braking spring 132 are subjected to tensile forces to offset the gravity of the terminal 14. At the same time, the resistance generated by the contact between the braking bracket 131 and the braking slide rail 134 with a specific shape offsets the restoring forces generated by the gravity spring assembly 12 and the braking spring 132 in any state, forming a balance, and thus realizing hovering at any position. This structure realizes the hovering of the terminal 14 at any position in a purely mechanical manner, and the volume of the structure can be adjusted according to the size of the application terminal 14. At the same time, it is not limited by energy and can be used in any environment, with a wide range of applications, low cost, and the lifting speed can be arbitrarily controlled, improving the user experience.

[0035] The present invention is not limited only to what is described in the specification and embodiments. Therefore, for those skilled in the art, additional advantages and modifications can be easily achieved. Thus, without departing from the spirit and scope of the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details, representative devices, and illustrated examples shown and described herein.

Claims

1. A sliding rail structure capable of freely lifting and hovering, characterized in that Comprising: A housing and an inner housing; the housing is slidably disposed outside the inner housing, gravity spring assemblies are respectively provided inside both sides of the inner housing, one end of each gravity spring assembly is connected to the inner housing, and the other end passes through the inner housing and is connected to the housing. A braking assembly is movably provided in the middle of the inner housing, and the braking assembly includes: a braking bracket, a braking spring, and a braking straight rod; the braking bracket is in a rhombus shape. When the upper end and the lower end of the braking bracket contract towards opposite directions, the left side and the right side of the braking bracket expand towards opposite directions respectively. A braking spring is provided inside the braking bracket, the bottom of the braking spring is connected to the bottom of the braking bracket, the top of the braking spring is connected to the side wall of the top of the inner housing, the upper end of the braking bracket is connected to a braking straight rod, the bottom of the braking straight rod passes through the inner housing and is connected to the housing. Serpentine braking rails are also respectively provided on both sides of the inner housing, the braking rails are located on both sides of the braking bracket, and the braking straight rod makes a movement of extending or retracting relative to the inner housing as the housing slides. When the braking straight rod makes an extending movement, the braking bracket is pulled by the braking straight rod and moves inside the inner housing, and at the same time stretches the braking spring, generating a restoring force and cooperating with the pulling force of the braking straight rod to squeeze the braking bracket, and the left side and the right side of the braking bracket expand outwards and respectively contact the corresponding side braking rails.

2. The free-lifting and hovering slide rail structure according to claim 1, characterized in that The gravity spring assembly includes: a gravity bolt, the gravity bolt penetrates through the top of the inner housing, a gravity connecting piece is threadedly connected to the end of the gravity bolt that penetrates into the inner housing, the gravity connecting piece is fixedly connected with a gravity spring, and the end of the gravity spring away from the gravity connecting piece passes through the inner housing and is fixedly connected to the bottom of the housing.

3. The sliding rail structure capable of freely lifting and hovering according to claim 1, wherein The braking bracket includes: a first connecting rod, a second connecting rod, a third connecting rod, and a fourth connecting rod; one end of the first connecting rod is rotatably connected to one end of the second connecting rod, the end of the first connecting rod away from the second connecting rod is rotatably connected to the third connecting rod, the end of the second connecting rod away from the first connecting rod is rotatably connected to the fourth connecting rod, the end of the third connecting rod away from the first connecting rod is rotatably connected to the end of the fourth connecting rod away from the third connecting rod, one end of the braking straight rod is fixedly connected to the connection end of the first connecting rod and the second connecting rod, and the other end of the braking straight rod passes through the connection end of the third connecting rod and the fourth connecting rod.

4. The sliding rail structure capable of freely lifting and hovering according to claim 3, wherein, Rollers are respectively rotatably connected to the connection end of the first connecting rod and the third connecting rod and the connection end of the second connecting rod and the fourth connecting rod, the middle of the roller is concave, and the roller is matched with the braking rail.

5. The sliding rail structure capable of free lifting and hovering according to claim 1, wherein A spring connecting piece is also fixedly provided at the lower end of the braking bracket, the braking straight rod passes through the spring connecting piece, there are two braking springs, which are respectively located on both sides of the braking straight rod, and the bottom of the braking spring is fixedly connected to the spring connecting piece.

6. The sliding rail structure capable of freely lifting and hovering according to claim 1, wherein, The two braking slide rails are symmetrically arranged, and each braking slide rail includes: a first section, a second section, and a third section; the second sections of the two braking slide rails are bent towards the direction where the symmetry line is located, and the first sections and the third sections of the two braking slide rails are respectively inclined and extended away from the symmetry line.

7. The sliding rail structure capable of freely lifting and hovering according to claim 1, wherein At least a pair of spaced limiting pulleys are provided in the middle of one surface of the inner shell, and a vertical limiting plate is further connected to the bottom of the outer shell, and the limiting plate is located between the pair of limiting pulleys.

8. An application terminal, characterized in that, The application terminal includes: a terminal and a lifting slide rail structure fixedly connected to the terminal, and the lifting slide rail structure is the freely lifting and hovering slide rail structure according to any one of claims 1-7.

9. The application terminal according to claim 8, wherein It further includes: a support frame, the support frame is fixedly connected to the inner shell of the lifting slide rail structure, and the terminal is fixedly connected to the outer shell of the lifting slide rail structure.

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