Lifting rod device

Abstract

The invention provides a lifting rod device which comprises a fixing frame used for being fixed to a wall. The lifting rod is mounted on the fixed frame in a vertical sliding manner; the one-way damping structure is arranged between the fixing frame and the lifting rod, and when the lifting rod is driven to slide upwards relative to the fixing frame, the one-way damping structure does not provide a damping effect on sliding of the lifting rod; when the lifting rod is driven to slide downwards relative to the fixing frame, the one-way damping structure provides a damping effect on sliding of the lifting rod; after the driving force for driving the lifting rod is removed, the damping force provided by the one-way damping structure enables the lifting rod to keep still. According to the lifting rod device, on the basis that stepless adjustment can be achieved, the lifting rod can be pushed upwards in a labor-saving mode.

Description

Technical Field

[0001] The invention relates to a lifting rod device. Background Art

[0002] In order to achieve stepless adjustment (i.e., the lifting rod can be moved to any position and stay there), the existing lifting rods on the market that can move up and down generally use a damping structure to make the lifting rod overcome its own gravity and remain stationary, so that it will not fall due to gravity. However, most of the existing damping structures have a two-way damping effect, that is, pushing up or pulling down the lifting rod needs to overcome the damping force provided by the damping structure. However, since pushing up the lifting rod not only has to overcome the damping force but also has to overcome the gravity of the lifting rod and its attached parts such as the shower head, pushing up the lifting rod is often more laborious, while pulling down the lifting rod is less laborious due to gravity. In view of this, how to provide a lifting rod device that can achieve stepless adjustment while making it less laborious to push up the lifting rod is a technical problem that needs to be solved urgently in this field. Summary of the invention

[0003] In order to solve the above technical problems, the purpose of the present invention is a lifting rod device, which can realize stepless adjustment and make it easier to push up the lifting rod.

[0004] To achieve the above object, the technical solution adopted by the present invention is: A lifting rod device, comprising: A fixing bracket, used for fixing on a wall; A lifting rod is slidably mounted on the fixing frame; A one-way damping structure is provided between the fixed frame and the lifting rod. When the lifting rod is driven to slide upward relative to the fixed frame, the one-way damping structure does not provide a damping effect on the sliding of the lifting rod; when the lifting rod is driven to slide downward relative to the fixed frame, the one-way damping structure provides a damping effect on the sliding of the lifting rod; after the driving force driving the lifting rod is removed, the damping force provided by the one-way damping structure keeps the lifting rod stationary.

[0005] In an optional or preferred embodiment, a longitudinally extending rack is provided on the lifting rod, and the one-way damping structure includes a damping member and a meshing gear meshing with the rack, and the meshing gear can move between a damping position and a separation position. In the damping position, the damping member cooperates with the meshing gear to provide the damping force, and in the separation position, the damping member is separated from the meshing gear and does not provide the damping force; when the lifting rod slides upward, the meshing gear is driven to move to the separation position by the rack, and when the lifting rod slides downward, the meshing gear is driven to move to the meshing position by the rack.

[0006] In an optional or preferred embodiment, the damping member includes a damping gear and a damping shaft, the damping shaft is fixed on the fixed frame, the damping gear is rotatably mounted outside the damping shaft and is interference fit with the damping shaft, so that when the damping gear rotates relative to the damping shaft, there is friction between the two, and the friction force forms the damping force.

[0007] In an optional or preferred embodiment, a rubber ring is sleeved on the outer wall of the damping shaft, and when the damping gear is sleeved outside the damping shaft, the inner wall of the damping gear and the outer wall of the damping shaft squeeze the rubber ring, and when the damping gear rotates relative to the damping shaft, the rubber ring generates the friction force on the rotation of the damping gear.

[0008] In an optional or preferred embodiment, a long hole is provided on the fixing frame, and the central axis of the meshing gear rotates and slides in the long hole; when the lifting rod slides downward, the meshing gear moves downward along the long hole to the meshing position under the drive of the rack and the action of the counterweight force, the elastic force or the magnetic attraction force.

[0009] In an optional or preferred embodiment, a longitudinally extending rack is provided on the lifting rod, and the one-way damping structure includes a damping member and a meshing gear meshing with the rack, the damping member includes a ratchet and a friction pad, the ratchet forms a friction force with the fixed frame through the friction pad, the meshing gear is sleeved outside the ratchet, the inner wall of the meshing gear is provided with a first ratchet tooth, and the outer wall of the ratchet is provided with a second ratchet tooth matching the first ratchet tooth, when the meshing gear rotates forward relative to the ratchet, the first ratchet tooth and the second ratchet tooth slide relative to each other without providing the damping force, and when the meshing gear rotates reversely relative to the ratchet, the first ratchet tooth and the second ratchet tooth mesh to provide the damping force.

[0010] In an optional or preferred embodiment, a longitudinally extending rack is provided on the lifting rod, the one-way damping structure includes a damping member and a meshing gear meshing with the rack, the damping member includes a damping shaft and a damping shell sleeved outside the damping shaft, the damping shaft is fixed to the fixed frame, and damping oil is provided in the damping shell. When the damping shell rotates in a positive direction relative to the damping shaft, the damping oil can be disturbed by the damping shaft more quickly without forming a damping force or forming a smaller damping force. When the damping shell rotates in a reverse direction relative to the damping shaft, the damping oil can be disturbed by the damping shaft more slowly to form a larger damping force. The meshing gear is sleeved outside the damping shell and cooperates with the rotation of the damping shell. When the lifting rod slides upward, the meshing gear and the damping shell are driven to rotate in the positive direction by the rack, and when the lifting rod slides downward, the meshing gear and the damping shell are driven to rotate in the reverse direction by the rack.

[0011] In an optional or preferred embodiment, a roller is rotatably provided on the fixed frame, and a sliding rib is longitudinally provided on the lifting rod. The roller and the sliding rib are rollingly matched, and at least two rollers are provided and are respectively located on the upper and lower sides of the meshing gear.

[0012] In an optional or preferred embodiment, a roller is also rotatably provided on the fixed frame, and a sliding rib is longitudinally provided on the lifting rod, and the roller rolls with the sliding rib; the roller is dumbbell-shaped, and includes two parallel wheel bodies and a wheel axle axially connecting the two wheel bodies, and also includes an elastic member and an elastic member support seat, the elastic member support seat includes a C-shaped ring rotatably matched with the wheel axle and an elastic member installation cavity connected to the C-shaped ring, one end of the elastic member is installed in the elastic member installation cavity, and the other end is abutted against the fixed frame.

[0013] In an optional or preferred embodiment, the lifting rod has a longitudinally extending sliding cavity therein, and the fixing frame includes a fixing portion for fixing on a wall and an inserting portion inserted into the sliding cavity, the inserting portion is equipped with the one-way damping structure and is inserted into the sliding cavity through the top opening of the lifting rod, the fixing portion is located outside the sliding cavity, and an avoidance groove is formed on one side of the sliding cavity for avoiding the fixing frame.

[0014] In an optional or preferred embodiment, the top end of the lifting rod is also provided with a spring-loaded assembly for preventing the fixing frame from escaping from the sliding cavity. During the process of inserting the fixing frame into the sliding cavity, the spring-loaded assembly is pushed to make way for the spring-loaded assembly. When the fixing frame is inserted into the sliding cavity and is in place, the spring-loaded assembly is reset to confine the fixing frame in the sliding cavity.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: 1. The present invention provides a one-way damping structure. When the lifting rod is driven to slide upward relative to the fixed frame, the one-way damping structure does not provide a damping effect on the sliding of the lifting rod (it should be explained that the "no damping effect" of the present invention includes both the case where no damping effect is provided and the case where a slight damping effect is provided); when the lifting rod is driven to slide downward relative to the fixed frame, the one-way damping structure provides a damping effect on the sliding of the lifting rod; after the driving force driving the lifting rod is removed, the damping force provided by the one-way damping structure makes the lifting rod remain stationary, thereby realizing stepless adjustment of the lifting rod, and making it easier to push up the lifting rod without overcoming the damping force.

[0016] 2. The one-way damping structure includes a damping member and a meshing gear meshed with a rack on the lifting rod, the meshing gear can move between a damping position and a separation position, when in the damping position, the damping member cooperates with the meshing gear to provide a damping force, when in the separation position, the damping member is separated from the meshing gear and does not provide a damping force; when the lifting rod slides upward, the meshing gear is driven to move to the separation position by the rack, and when the lifting rod slides downward, the meshing gear is driven to move to the meshing position by the rack. In this way, by setting the meshing gear to move between the damping position and the separation position, the one-way damping structure provides damping or no damping to the lifting rod. The one-way damping structure is a clutch-type one-way damping structure, which has an ingenious conception, a simple structure, and a reliable one-way damping function.

[0017] 3. The damping element includes a damping gear and a damping shaft. The friction between the two forms a damping force, and the damping structure is simple.

[0018] 4. The one-way damping structure includes a damping member and a meshing gear meshing with a rack. The damping member includes a ratchet and a friction pad. The ratchet forms friction with a fixed frame through the friction pad. The meshing gear is sleeved outside the ratchet. The inner wall of the meshing gear is provided with a first ratchet tooth. The outer wall of the ratchet is provided with a second ratchet tooth that matches the first ratchet tooth. When the meshing gear rotates forward relative to the ratchet, the first ratchet tooth and the second ratchet tooth slide relative to each other without providing a damping force. When the meshing gear rotates reversely relative to the ratchet, the first ratchet tooth and the second ratchet tooth mesh to provide a damping force. In this way, the one-way damping structure provides or does not provide damping to the lifting rod by realizing the different forward and reverse rotations of the meshing gear through the cooperation of the first ratchet tooth and the second ratchet tooth. The design is ingenious, the structure is simple, and the one-way damping function is reliable.

[0019] 5. The one-way damping structure includes a damping member and a meshing gear meshing with the rack on the lifting rod. The damping member includes a damping shaft and a damping shell sleeved outside the damping shaft. The damping shaft is fixed on a fixed frame. Damping oil is arranged in the damping shell. When the damping shell rotates in the positive direction relative to the damping shaft, the damping oil can be disturbed by the damping shaft more quickly without forming a damping force or forming a smaller damping force. When the damping shell rotates in the reverse direction relative to the damping shaft, the damping oil can be disturbed by the damping shaft more slowly to form a larger damping force. The meshing gear sleeve is arranged on the damping shaft. When the lifting rod slides upward, the meshing gear and the damping shell are driven to rotate in the positive direction through the rack, and when the lifting rod slides downward, the meshing gear and the damping shell are driven to rotate in the reverse direction through the rack. In this way, by setting the damping shell to rotate in different directions relative to the damping shaft, the damping oil is disturbed at different speeds to achieve the one-way damping structure to provide damping or no damping for the lifting rod (there may be a slight damping force, and its damping effect is negligible). The design is ingenious, the structure is simple, and the one-way damping function is reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0021] in: Figure 1 is a schematic diagram of a three-dimensional assembly structure of a lifting rod device according to a first embodiment of the present invention; Figure 2 is a schematic diagram of a three-dimensional exploded structure of a lifting rod device according to a first embodiment of the present invention; Figure 3 yes Figure 2 A cross-sectional view of Figure 4 is a cross-sectional view of an exploded state of a lifting rod device according to a first embodiment of the present invention; Figure 5 is a longitudinal sectional view of the lifting rod device of the first embodiment of the present invention in a stationary state or a pulled-down state (the meshing gear is in a damping position); Figure 6 is a longitudinal sectional view of the lifting rod device of the first embodiment of the present invention in the push-up state (the meshing gear is in the disengaged position); Figure 7 is a transverse cross-sectional view of a lifting rod device according to a first embodiment of the present invention; Figure 8 is a partial three-dimensional schematic diagram of the first embodiment of the present invention (the meshing gear is in the damping position); Fig. 9 is a partial three-dimensional schematic diagram of the first embodiment of the present invention (the meshing gear is in a disengaged position); Fig.10 It is one of the partial exploded schematic diagrams of the first embodiment of the present invention; Fig.11 This is the second partial exploded schematic diagram of the first embodiment of the present invention; Fig.12 This is the third partial exploded schematic diagram of the first embodiment of the present invention; Fig.13 yes Fig.11 A cross-sectional view of Fig.14 is a three-dimensional schematic diagram of a damping shaft according to a first embodiment of the present invention; Fig.15 is an exploded schematic diagram of a damping shaft according to a first embodiment of the present invention; Fig.16 It is a three-dimensional assembly diagram of the roller, the elastic member and the elastic member support seat of the first embodiment of the present invention; Fig.17 is a perspective exploded schematic diagram of a roller, an elastic member and an elastic member support seat according to a first embodiment of the present invention; Fig.18 is a three-dimensional schematic diagram of a gland of a fixing frame according to a first embodiment of the present invention; Fig.19 This is one of the schematic diagrams of the assembly process of the lifting rod and the fixing frame of the first embodiment of the present invention; Fig. 20 This is the second schematic diagram of the assembly process of the lifting rod and the fixing frame of the first embodiment of the present invention; Fig.21 is a longitudinal sectional view of a lifting rod device according to a second embodiment of the present invention; Fig. 22 is one of the partial exploded views of the lifting rod device of the second embodiment of the present invention; Fig.23 This is the second partial exploded view of the lifting rod device of the second embodiment of the present invention; Fig.24 is one of the three-dimensional structural diagrams of the ratchet wheel according to the second embodiment of the present invention; Fig.25 This is the second three-dimensional structural diagram of the ratchet according to the second embodiment of the present invention.

[0022] The accompanying drawings in the figure are marked as follows: 10-fixed frame; 11-main body; 12-pressure cover; 13-long hole; 20-lifting rod; 21, 21'-rack; 22-sliding rib; 23-sliding cavity; 24-avoidance groove; 30-one-way damping structure; 31, 31'-damping member; 311-damping gear; 312-damping shaft; 3121-rubber ring; 313-ratchet; 3131-second ratchet; 314-friction pad; 32, 32'-meshing gear; 321-first ratchet; 40-Roller; 50-elastic member; 51-elastic member support seat; 60- snap assembly; 61- base; 62- slide buckle; 621- guide slope; 63- spring. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] First embodiment: See also Figures 1 to 20 The first preferred embodiment of the present invention provides a lifting rod device, which includes a fixing frame 10, a lifting rod 20 and a one-way damping structure 30. The fixing frame 10 is used to be fixed on a wall; the lifting rod 20 is slidably mounted on the fixing frame 10; the one-way damping structure 30 is arranged between the fixing frame 10 and the lifting rod 20, and when the lifting rod 20 is driven to slide upward relative to the fixing frame 10, the one-way damping structure 30 does not provide a damping effect on the sliding of the lifting rod 20; when the lifting rod 20 is driven to slide downward relative to the fixing frame 10, the one-way damping structure 30 provides a damping effect on the sliding of the lifting rod 20; after the driving force driving the lifting rod 20 is removed, the damping force provided by the one-way damping structure 30 keeps the lifting rod 20 stationary. In this way, when the lifting rod 20 is driven to slide upward relative to the fixed frame 10, there is no need to overcome the damping force of the one-way damping structure 30, thereby achieving the purpose of saving effort in pushing up the lifting rod, and under the action of the damping force of the one-way damping structure 30, after the driving force of the lifting rod 20 is removed, the lifting rod 20 can remain stationary, thereby achieving stepless adjustment of the height of the lifting rod 20, and the adjustment is simple and convenient.

[0025] Specifically, in this embodiment, the lifting rod 20 is provided with a longitudinally extending rack 21, and the one-way damping structure 30 includes a damping member 31 and a meshing gear 32 meshed with the rack 21, and the meshing gear 32 can move between a damping position and a separation position. In the damping position, the damping member 31 cooperates with the meshing gear 32 to provide a damping force, and in the separation position, the damping member 31 is separated from the meshing gear 32 and does not provide a damping force. When the lifting rod 20 slides upward, the meshing gear 32 is driven to move to the separation position through the rack 21, and when the lifting rod 20 slides downward, the meshing gear 32 is driven to move to the meshing position through the rack 21. That is, the one-way damping structure 30 of this embodiment is a clutch-type one-way damping structure.

[0026] More specifically, in this embodiment, the damping member 31 includes a damping gear 311 and a damping shaft 312. The damping shaft 312 is fixed to the fixing frame 10 and cannot rotate, and the damping gear 311 is rotatably sleeved outside the damping shaft 312 and has an interference fit with the damping shaft 312. The interference fit allows the damping gear 311 to rotate relative to the damping shaft 312, and friction between the two forms the damping force of the unidirectional damping structure 30.

[0027] In this embodiment, a rubber ring 3121 is sleeved on the outer wall of the damping shaft 312. When the damping gear 311 is sleeved outside the damping shaft 312, the inner wall of the damping gear 311 and the outer wall of the damping shaft 312 squeeze the rubber ring 3121. When the damping gear 311 rotates relative to the damping shaft 312, the rubber ring 3121 generates friction force on the rotation of the damping gear 311.

[0028] In this embodiment, a long hole 13 is provided on the fixing frame 10, and the central axis of the meshing gear 32 rotates and slides in the long hole 13. When the lifting rod 20 slides downward, the meshing gear 32 can move downward to the meshing position along the long hole 13 only under the drive of the rack 21, or can further move downward to the meshing position along the long hole 13 under the action of the counterweight force, the elastic force or the magnetic force. Among them, the counterweight force can be provided by a counterweight block (not shown), or by adding weight to the weight of the meshing gear 32 itself, the elastic force can be provided by a spring (not shown), and the magnetic force can be provided by a magnetic attraction member (not shown). With the assistance of the counterweight force, the elastic force or the magnetic force, it can be further ensured that when the lifting rod 20 slides downward, the meshing gear 32 can reliably move to the meshing position, and the effect is better.

[0029] In this embodiment, a roller 40 is rotatably provided on the fixing frame 10, and a sliding rib 22 is longitudinally provided on the lifting rod 20. The roller 40 and the sliding rib 22 are in rolling cooperation, and at least two rollers 40 are provided and are respectively located on the upper and lower sides of the meshing gear 32. By providing the roller 40, the lifting rod 20 can slide more smoothly.

[0030] See also Fig.16 and Fig.17 In this embodiment, specifically, the roller 40 is dumbbell-shaped, and includes two parallel wheel bodies and a wheel axle axially connecting the two wheel bodies. In order to enable the roller 40 to always keep in contact with the sliding rib 22 and roll, this embodiment also includes an elastic member 50 and an elastic member support seat 51. The elastic member support seat 51 includes a C-shaped ring rotatably matched with the wheel axle and an elastic member installation cavity connected to the C-shaped ring. One end of the elastic member 50 is installed in the elastic member installation cavity, and the other end is in contact with the fixing frame 10.

[0031] In order to facilitate the installation of the roller 40, the damping gear 311, the damping shaft 312, and the meshing gear 32 on the fixing frame 10, the fixing frame 10 preferably includes a main body 11 and a pressure cover 12. The main body 11 forms a cavity for installing the roller 40, the damping gear 311, the damping shaft 312, and the meshing gear 32. One side of the main body 11 is open, and the pressure cover 12 is fixed to cover the opening. Fig.10 A long hole 13 is respectively provided at corresponding positions of the main body 11 and the pressure cover 12.

[0032] In this embodiment, the lifting rod 20 has a longitudinally extending sliding cavity 23, and the fixing frame 10 includes a fixing portion for fixing on a wall and an inserting portion inserted into the sliding cavity 23. The inserting portion is installed with a one-way damping structure 30 and is inserted into the sliding cavity 23 through the top opening of the lifting rod 20. The fixing portion is located outside the sliding cavity 23, and an avoidance groove 24 is formed on one side of the sliding cavity 23 for avoiding the fixing frame 10.

[0033] See also Figure 5 , Fig.11 , Fig.12 and Fig.13 In order to facilitate the assembly of the lifting rod device, in this embodiment, the top of the lifting rod 20 is also provided with a snap assembly 60 for preventing the fixing frame 10 from being separated from the sliding cavity 23. Fig.19 and Fig. 20 , the fixing frame 10 pushes against the snap assembly 60 during the insertion of the sliding cavity 23 so that the snap assembly 60 makes way; see Figure 5 When the fixing frame 10 is inserted into the sliding cavity 23 and is in place, the snap assembly 60 is reset to restrict the fixing frame 10 in the sliding cavity 23.

[0034] Specifically, the snap assembly 60 includes a snap base 61, a slide 62 and a spring 63. The snap base 61 is fixed to the top of the lifting rod 20 by screws. The slide 62 is slidably arranged on the snap base 61 and partially extends out of the snap base 61 under the spring-pushing action of the spring 63. The spring 63 is pushed between the snap base 61 and the slide 62. The portion of the slide 62 extending out of the snap base 61 is provided with a guide slope 621. When the fixing frame 10 is just inserted into the sliding cavity 23, the fixing frame 10 abuts against the guide slope 621 to make way for the slide 62 to slide into the snap base 61 to allow the fixing frame 10 to be inserted into the sliding cavity 23.

[0035] The specific working process of this embodiment is: See also Figure 5 , Figure 5 It is a longitudinal cross-sectional view of the lifting rod 20 in a stationary state or a pulled-down state. At this time, the meshing gear 32 is in a damping position, and the damping gear 311 of the damping member 31 cooperates with the meshing gear 32 to provide a damping force. When the external force applied to the lifting rod 20 is removed, the damping force of the one-way damping structure keeps the lifting rod 20 in a stationary state, thereby realizing stepless height adjustment of the lifting rod 20. When the lifting rod 20 slides downward, it is necessary to overcome the damping force of the one-way damping structure. However, since the lifting rod 20 does not need to overcome the gravity of the lifting rod 20 and its accessories when sliding downward, it is not too laborious to slide the lifting rod 20 downward.

[0036] See also Figure 6 , Figure 6 is Figure 5 In the state shown in the figure, the lifting rod 20 is pushed up in the direction of arrow F. When the lifting rod 20 slides upward, the meshing gear 32 is driven to move to the separation position through the rack 21. The damping gear 311 of the damping member 31 is separated from the meshing gear 32 and does not provide damping force, thereby easily pushing up the lifting rod 20.

[0037] Second embodiment: See also Figure 21 to Figure 25 The second preferred embodiment of the present invention provides a lifting rod device, which is mainly different from the first preferred embodiment in that the specific structure of the one-way damping structure is different. The one-way damping structure of the first preferred embodiment is a clutch-type one-way damping structure, which realizes the one-way damping structure providing damping or not providing damping to the lifting rod through the activity of the meshing gear between the damping position and the separation position. The one-way damping structure of this embodiment is replaced by a ratchet-tooth one-way damping structure.

[0038] Specifically, the ratchet-type one-way damping structure includes a damping member 31' and a meshing gear 32' meshed with the rack 21'. The damping member 31' includes a ratchet 313 and a friction pad 314. The ratchet 313 forms a friction force with the fixing frame 10 through the friction pad 314. As in the first embodiment, the damping force is also formed by the friction force. The meshing gear 32' is sleeved outside the ratchet 313. The inner wall of the meshing gear 32' is provided with a first ratchet tooth 321, and the outer wall of the ratchet 313 is provided with a second ratchet tooth 3131 matched with the first ratchet tooth 321. See Fig.21 When the lifting rod 20 slides upward and drives the meshing gear 32' to rotate forwardly relative to the ratchet 313 through the rack 21', the first ratchet 321 and the second ratchet 3131 slide relative to each other, and the meshing gear 32' will not drive the ratchet 313 to rotate, and the ratchet 313 will not form friction with the fixed frame 10 through the friction pad 314, thereby not providing damping force; when the lifting rod 20 slides downward and drives the meshing gear 32' to rotate reversely relative to the ratchet 313 through the rack 21', the first ratchet 321 and the second ratchet 3131 mesh, and the meshing gear 32' will drive the ratchet 313 to rotate, and the ratchet 313 will further form friction with the fixed frame 10 through the friction pad 314, thereby providing damping force. The first ratchet 321 and the second ratchet 3131 cooperate to realize the different forward and reverse rotations of the meshing gear, and realize the one-way damping structure to provide damping or not to provide damping to the lifting rod, which is ingenious in conception, simple in structure, and reliable in one-way damping function.

[0039] The remaining structures not described in this embodiment refer to the first embodiment and will not be described again here.

[0040] The third embodiment (not shown): The third preferred embodiment of the present invention provides a lifting rod device, which is different from the first preferred embodiment mainly in that the specific structure of the one-way damping structure is different. The one-way damping structure of the first preferred embodiment is a clutch-type one-way damping structure, which realizes the one-way damping structure providing damping or not providing damping to the lifting rod through the activity of the meshing gear between the damping position and the separation position. The one-way damping structure of this embodiment is replaced by a one-way damping structure using damping oil.

[0041] Specifically, in this embodiment, the one-way damping structure 30 includes a damping member 31 and a meshing gear 32 meshing with the rack 21. The damping member 31 includes a damping shaft (not shown) and a damping shell (not shown) sleeved outside the damping shaft (not shown). The damping shaft is fixed on the fixing frame 10 and will not rotate. The damping shell is provided with damping oil (not shown), and the damping shell can rotate relative to the damping shaft. When the damping shell rotates in the positive direction relative to the damping shaft, the damping oil can be disturbed by the damping shaft more quickly without forming a damping force or forming a smaller damping force. When the damping shell rotates in the reverse direction relative to the damping shaft, the damping oil can be disturbed by the damping shaft more slowly and form a larger damping force. In order to realize the disturbance of the damping oil by the damping shaft, blades for disturbing the damping oil can be selected in the radial direction of the damping shaft. Two blades can be selected and arranged symmetrically on the damping shaft. The structure of the damping member 31 can refer to the damper used at the hinge of the existing toilet cover, as long as it can achieve a one-way damping effect, and will not be elaborated here.

[0042] The meshing gear 32 is sleeved outside the damping shell and cooperates with the rotation of the damping shell, that is, when the meshing gear 32 rotates, it will drive the damping shell to rotate together. When the lifting rod 20 slides upward, the meshing gear 32 and the damping shell are driven to rotate in the positive direction through the rack 21, and the damping oil is disturbed by the damping shaft more quickly without forming a damping force or forming a smaller damping force, so that the lifting rod 20 does not need to overcome the damping force when pushing it up, or only needs to overcome a smaller damping force, so as to achieve the purpose of saving effort when pushing the lifting rod 20 up; when the lifting rod 20 slides downward, the meshing gear 32 and the damping shell are driven to rotate in the opposite direction through the rack 21, and the damping oil is disturbed by the damping shaft more slowly to form a larger damping force, but since the lifting rod 20 does not need to overcome the gravity of the lifting rod 20 and its accessories when sliding downward, it will not be too laborious to slide the lifting rod 20 downward. When the lifting rod 20 is released and not driven, the lifting rod 20 can remain stationary under the action of the damping force.

[0043] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A lifting rod device, characterized in that: include: A fixing bracket, used for fixing on a wall; A lifting rod is slidably mounted on the fixing frame; a one-way damping structure, disposed between the fixing frame and the lifting rod, wherein when the lifting rod is driven to slide upward relative to the fixing frame, the one-way damping structure does not provide a damping effect on the sliding of the lifting rod; When the lifting rod is driven to slide downward relative to the fixing frame, the one-way damping structure provides a damping effect on the sliding of the lifting rod; After the driving force driving the lifting rod is removed, the damping force provided by the one-way damping structure enables the lifting rod to remain stationary.

2. The lifting rod device according to claim 1, characterized in that: The lifting rod is provided with a longitudinally extending rack, and the one-way damping structure includes a damping member and a meshing gear meshing with the rack, and the meshing gear can move between a damping position and a separation position. In the damping position, the damping member cooperates with the meshing gear to provide the damping force, and in the separation position, the damping member is separated from the meshing gear and does not provide the damping force; when the lifting rod slides upward, the meshing gear is driven to move to the separation position by the rack, and when the lifting rod slides downward, the meshing gear is driven to move to the meshing position by the rack.

3. The lifting rod device according to claim 2, characterized in that: The damping member includes a damping gear and a damping shaft, wherein the damping shaft is fixed on the fixing frame, and the damping gear is rotatably sleeved outside the damping shaft and is interference fit with the damping shaft, so that when the damping gear rotates relative to the damping shaft, there is friction between the two, and the friction forms the damping force.

4. The lifting rod device according to claim 3, characterized in that: A rubber ring is sleeved on the outer wall of the damping shaft. When the damping gear is sleeved outside the damping shaft, the inner wall of the damping gear and the outer wall of the damping shaft squeeze the rubber ring. When the damping gear rotates relative to the damping shaft, the rubber ring generates the friction force on the rotation of the damping gear.

5. The lifting rod device according to claim 2, characterized in that: The fixing frame is provided with a long hole, and the central axis of the meshing gear rotates and slides in the long hole; when the lifting rod slides downward, the meshing gear moves downward along the long hole to the meshing position under the drive of the rack and the action of the counterweight force, the elastic force or the magnetic attraction force.

6. The lifting rod device according to claim 1, characterized in that: The lifting rod is provided with a longitudinally extending rack, the one-way damping structure includes a damping member and a meshing gear meshing with the rack, the damping member includes a ratchet and a friction pad, the ratchet forms a friction force with the fixed frame through the friction pad, the meshing gear is sleeved outside the ratchet, the inner wall of the meshing gear is provided with a first ratchet tooth, and the outer wall of the ratchet is provided with a second ratchet tooth matching the first ratchet tooth, when the meshing gear rotates forwardly relative to the ratchet, the first ratchet tooth and the second ratchet tooth slide relative to each other without providing the damping force, and when the meshing gear rotates reversely relative to the ratchet, the first ratchet tooth and the second ratchet tooth mesh to provide the damping force.

7. The lifting rod device according to claim 1, characterized in that: The lifting rod is provided with a longitudinally extending rack, the one-way damping structure includes a damping member and a meshing gear meshing with the rack, the damping member includes a damping shaft and a damping shell sleeved outside the damping shaft, the damping shaft is fixed to the fixing frame, and damping oil is arranged in the damping shell. When the damping shell rotates in a positive direction relative to the damping shaft, the damping oil can be disturbed by the damping shaft more quickly without forming a damping force or forming a smaller damping force. When the damping shell rotates in a reverse direction relative to the damping shaft, the damping oil can be disturbed by the damping shaft more slowly to form a larger damping force. The meshing gear is sleeved outside the damping shell and cooperates with the rotation of the damping shell. When the lifting rod slides upward, the meshing gear and the damping shell are driven to rotate in a positive direction by the rack, and when the lifting rod slides downward, the meshing gear and the damping shell are driven to rotate in a reverse direction by the rack.

8. The lifting rod device according to any one of claims 2 to 7, characterized in that: The fixing frame is also rotatably provided with a roller, and the lifting rod is provided with a sliding rib in the longitudinal direction. The roller and the sliding rib are rollingly matched, and at least two rollers are provided and are respectively located at the upper and lower sides of the meshing gear.

9. The lifting rod device according to any one of claims 2 to 7, characterized in that: A roller is also rotatably provided on the fixed frame, and a sliding rib is longitudinally provided on the lifting rod, and the roller rolls with the sliding rib; the roller is dumbbell-shaped, and includes two parallel wheel bodies and a wheel axle axially connecting the two wheel bodies, and also includes an elastic member and an elastic member support seat, and the elastic member support seat includes a C-shaped ring rotatably matched with the wheel axle and an elastic member installation cavity connected to the C-shaped ring, one end of the elastic member is installed in the elastic member installation cavity, and the other end is abutted against the fixed frame.

10. The lifting rod device according to claim 1, characterized in that: The lifting rod has a longitudinally extending sliding cavity therein, and the fixing frame includes a fixing portion for fixing on a wall and an inserting portion inserted into the sliding cavity, the inserting portion is provided with the one-way damping structure and is inserted into the sliding cavity through the top opening of the lifting rod, the fixing portion is located outside the sliding cavity, and an avoidance groove is formed on one side of the sliding cavity for avoiding the fixing frame.

11. The lifting rod device according to claim 10, characterized in that: The top end of the lifting rod is also provided with a snap assembly for preventing the fixing frame from escaping from the sliding cavity. During the process of inserting the fixing frame into the sliding cavity, the snap assembly is pushed to make way for the snap assembly. When the fixing frame is inserted into the sliding cavity and is in place, the snap assembly is reset to restrict the fixing frame in the sliding cavity.

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