Lifting rod device

Abstract

The utility model 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 utility model 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. Utility Model Content

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

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A lifting rod device, comprising:

[0006] A fixing bracket, used for fixing on a wall;

[0007] A lifting rod is slidably mounted on the fixing frame;

[0008] 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.

[0009] 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 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. 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 by the rack to move to the separation position. When the lifting rod slides downward, the meshing gear is driven by the rack to move to the meshing position.

[0010] 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 sleeved outside the damping shaft and is in 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.

[0011] In an optional or preferred embodiment, 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.

[0012] In an optional or preferred embodiment, a long hole is provided on the fixed frame. 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 under the action of a gravity or an elastic force or a magnetic suction force.

[0013] 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 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 first ratchet teeth, and the outer wall of the ratchet is provided with second ratchet teeth cooperating with the first ratchet teeth. When the meshing gear rotates forward relative to the ratchet, the first ratchet teeth and the second ratchet teeth slide relative to each other and do not provide the damping force. When the meshing gear rotates backward relative to the ratchet, the first ratchet teeth and the second ratchet teeth are meshed to provide the damping force.

[0014] 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 housing sleeved outside the damping shaft. The damping shaft is fixed on the fixing frame. Damping oil is provided in the damping housing. When the damping housing rotates in the positive direction relative to the damping shaft, the damping oil can be disturbed relatively quickly by the damping shaft without forming a damping force or forming a relatively small damping force. When the damping housing rotates in the reverse direction relative to the damping shaft, the damping oil can be disturbed relatively slowly by the damping shaft to form a relatively large damping force. The meshing gear is sleeved outside the damping housing and is rotationally linked and cooperated with the damping housing. When the lifting rod slides upward, the meshing gear and the damping housing are driven to rotate in the positive direction through the rack. When the lifting rod slides downward, the meshing gear and the damping housing are driven to rotate in the reverse direction through the rack.

[0015] In an optional or preferred embodiment, a roller is also rotatably provided on the fixing frame. A sliding rib is provided longitudinally on the lifting rod. The roller is in rolling cooperation with the sliding rib. At least two rollers are provided and are respectively located on the upper and lower sides of the meshing gear.

[0016] In an optional or preferred embodiment, a roller is also rotatably provided on the fixing frame. A sliding rib is provided longitudinally on the lifting rod. The roller is in rolling cooperation with the sliding rib. The roller is dumbbell-shaped and includes two juxtaposed wheel bodies and a wheel shaft axially connecting the two wheel bodies. It also includes an elastic member and an elastic member support seat. The elastic member support seat includes a C-shaped ring rotatably cooperating with the wheel shaft and an elastic member installation cavity connecting the C-shaped ring. One end of the elastic member is inserted into the elastic member installation cavity, and the other end abuts against the fixing frame.

[0017] In an optional or preferred embodiment, a longitudinally extending sliding cavity is provided inside the lifting rod. The fixing frame includes a fixing portion for fixing on a wall and an insertion portion inserted into the sliding cavity. The insertion portion is provided with the one-way damping structure and is inserted into the sliding cavity from the top opening of the lifting rod. The fixing portion is located outside the sliding cavity. An avoidance groove for avoiding the fixing frame is formed on one side of the sliding cavity.

[0018] In an optional or preferred embodiment, a snap component for preventing the fixing frame from detaching from the sliding cavity is further provided at the top end of the lifting rod. During the process of the fixing frame being inserted into the sliding cavity, the snap component is pushed against so that the snap component makes way. When the fixing frame is inserted into the sliding cavity in place, the snap component resets to limit the fixing frame in the sliding cavity.

[0019] Compared with the prior art, the present utility model has at least the following beneficial effects:

[0020] 1. By providing 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 damping to the sliding of the lifting rod (it should be noted that the "not providing damping" of the present utility model includes both the case of completely not providing damping and the case of providing slight damping); when the lifting rod is driven to slide downward relative to the fixed frame, the one-way damping structure provides damping to the sliding of the lifting rod; after removing the driving force of the lifting rod, the damping force provided by the one-way damping structure keeps the lifting rod stationary. Thus, on the basis of enabling stepless adjustment of the lifting rod, it is more labor-saving to push the lifting rod upward without having to overcome the damping force.

[0021] 2. The one-way damping structure includes a damping member and an engaging gear that meshes with the rack on the lifting rod. The engaging gear can move between a damping position and a disengaged position. When in the damping position, the damping member cooperates with the engaging gear to provide a damping force; when in the disengaged position, the damping member is separated from the engaging gear and does not provide a damping force. When the lifting rod slides upward, the engaging gear is driven by the rack to move to the disengaged position. When the lifting rod slides downward, the engaging gear is driven by the rack to move to the meshing position. In this way, by setting the movement of the engaging gear between the damping position and the disengaged position, the one-way damping structure provides damping or does not provide damping to the lifting rod. The one-way damping structure is a clutch-type one-way damping structure, with a clever concept, simple structure, and reliable one-way damping function.

[0022] 3. The damping member includes a damping gear and a damping shaft, and the friction force between the two forms a damping force, with a simple damping structure.

[0023] 4. The one-way damping structure includes a damping member and an engaging gear that meshes with the rack. The damping member includes a ratchet and a friction pad. The ratchet forms a frictional force with the fixed frame through the friction pad. The engaging gear is sleeved outside the ratchet. The inner wall of the engaging gear is provided with first ratchet teeth, and the outer wall of the ratchet is provided with second ratchet teeth that cooperate with the first ratchet teeth. When the engaging gear rotates forward relative to the ratchet, the first ratchet teeth and the second ratchet teeth slide relative to each other and do not provide a damping force. When the engaging gear rotates backward relative to the ratchet, the first ratchet teeth and the second ratchet teeth mesh to provide a damping force. In this way, through the cooperation of the first ratchet teeth and the second ratchet teeth, different forward and backward rotations of the engaging gear are realized to provide damping or not provide damping to the lifting rod by the one-way damping structure, with a clever concept, simple structure, and reliable one-way damping function.

[0024] 5. The one-way damping structure includes a damping member and a meshing gear that meshes 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 the fixed frame. There is damping oil in the damping shell. When the damping shell rotates in the positive direction relative to the damping shaft, the damping oil can be disturbed relatively quickly by the damping shaft without forming a damping force or forming a relatively small damping force. When the damping shell rotates in the reverse direction relative to the damping shaft, the damping oil can be disturbed relatively slowly by the damping shaft to form a relatively large damping force. The meshing gear is sleeved outside the damping shell and is rotationally linked and cooperated with the damping shell. When the lifting rod slides upward, it drives the meshing gear and the damping shell to rotate in the positive direction through the rack. When the lifting rod slides downward, it drives the meshing gear and the damping shell to rotate in the reverse direction through the rack. In this way, by setting the different speeds of the damping oil being disturbed when the damping shell rotates in different directions relative to the damping shaft, the one-way damping structure provides damping or does not provide damping (there can be a slight damping force, and its damping effect is negligible) to the lifting rod. The concept is ingenious, the structure is simple, and the one-way damping function is reliable. Brief Description of the Drawings

[0025] The drawings described herein are used to provide a further understanding of the present invention, form a part of the present invention, and the schematic embodiments and descriptions thereof are used to explain the present invention, and do not constitute an improper limitation to the present invention.

[0026] Among them:

[0027] Figure 1 is the three-dimensional assembled structure schematic diagram of the lifting rod device of the first embodiment of the present invention;

[0028] Figure 2 is the three-dimensional exploded structure schematic diagram of the lifting rod device of the first embodiment of the present invention;

[0029] Figure 3 is Figure 2 the cross-sectional view of

[0030] Figure 4 is the cross-sectional view of the exploded state of the lifting rod device of the first embodiment of the present invention;

[0031] Figure 5 is the longitudinal cross-sectional view of the lifting rod device of the first embodiment of the present invention in a static state or a pulled-down state (the meshing gear is in the damping position);

[0032] Figure 6 is the longitudinal cross-sectional view of the lifting rod device of the first embodiment of the present invention in a pushed-up state (the meshing gear is in the separated position);

[0033] Figure 7 is the transverse cross-sectional view of the lifting rod device of the first embodiment of the present invention;

[0034] Figure 8 is a partial perspective view of the first embodiment of the present utility model (the meshing gears are in the damping position);

[0035] Figure 9 is a partial perspective view of the first embodiment of the present utility model (the meshing gears are in the disengaged position);

[0036] Figure 10 is one of the partial exploded views of the first embodiment of the present utility model;

[0037] Figure 11 is another partial exploded view of the first embodiment of the present utility model;

[0038] Figure 12 is yet another partial exploded view of the first embodiment of the present utility model;

[0039] Figure 13 is Figure 11 a cross-sectional view of;

[0040] Figure 14 is a perspective view of the damping shaft of the first embodiment of the present utility model;

[0041] Figure 15 is an exploded view of the damping shaft of the first embodiment of the present utility model;

[0042] Figure 16 is a perspective assembled view of the roller, elastic member and elastic member support seat of the first embodiment of the present utility model;

[0043] Figure 17 is a perspective exploded view of the roller, elastic member and elastic member support seat of the first embodiment of the present utility model;

[0044] Figure 18 is a perspective view of the gland of the fixing bracket of the first embodiment of the present utility model;

[0045] Figure 19 is one of the schematic diagrams of the assembly process of the lifting rod and the fixing bracket of the first embodiment of the present utility model;

[0046] Figure 20 is another schematic diagram of the assembly process of the lifting rod and the fixing bracket of the first embodiment of the present utility model;

[0047] Figure 21 is a longitudinal cross-sectional view of the lifting rod device of the second embodiment of the present utility model;

[0048] Figure 22 is one of the partial exploded views of the lifting rod device of the second embodiment of the present utility model;

[0049] Figure 23 It is the second partial exploded view of the lifting rod device according to the second embodiment of the present utility model;

[0050] Figure 24 It is the first three-dimensional structure diagram of the ratchet according to the second embodiment of the present utility model;

[0051] Figure 25 It is the second three-dimensional structure diagram of the ratchet according to the second embodiment of the present utility model.

[0052] The reference numerals in the figure are as follows:

[0053] 10 - fixing bracket; 11 - main body; 12 - gland; 13 - long slot;

[0054] 20 - lifting rod; 21, 21’ - rack; 22 - sliding rib; 23 - sliding cavity; 24 - avoidance groove;

[0055] 30 - one-way damping structure; 31, 31’ - damping member; 311 - damping gear; 312 - damping shaft; 3121 - rubber ring; 313 - ratchet; 3131 - second ratchet tooth; 314 - friction pad; 32, 32’ - meshing gear; 321 - first ratchet tooth;

[0056] 40 - roller;

[0057] 50 - elastic member; 51 - elastic member support seat;

[0058] 60 - snap component; 61 - base; 62 - sliding buckle; 621 - guiding inclined surface; 63 - spring. Detailed implementation manners

[0059] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0060] First embodiment:

[0061] Please refer to Figures 1 to 20, a lifting rod device according to a first preferred embodiment provided by the present utility model 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 connected to the fixing frame 10 in the up and down direction; the one-way damping structure 30 is disposed between the fixing frame 10 and the lifting rod 20. When driving the lifting rod 20 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 driving the lifting rod 20 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 removing the driving force for driving the lifting rod 20, the damping force provided by the one-way damping structure 30 enables the lifting rod 20 to remain stationary. In this way, when driving the lifting rod 20 to slide upward relative to the fixing frame 10, it is not necessary to overcome the damping force of the one-way damping structure 30, so as to achieve the purpose of making it easier to push up the lifting rod. And under the action of the damping force of the one-way damping structure 30, after removing the driving force for driving the lifting rod 20, the lifting rod 20 can remain stationary, realizing stepless adjustment of the height of the lifting rod 20, and the adjustment is simple and convenient.

[0062] Specifically, in this embodiment, a longitudinally extending rack 21 is provided on the lifting rod 20. The one-way damping structure 30 includes a damping member 31 and a meshing gear 32 meshing with the rack 21. 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. 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 rack 21 drives the meshing gear 32 to move to the separation position. When the lifting rod 20 slides downward, the rack 21 drives the meshing gear 32 to move to the meshing position. That is to say, the one-way damping structure 30 of this embodiment is a clutch-type one-way damping structure.

[0063] 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 on the fixing frame 10 and cannot rotate. The damping gear 311 is rotatably sleeved outside the damping shaft 312 and is in interference fit with the damping shaft 312. By means of the interference fit, when the damping gear 311 rotates relative to the damping shaft 312, there is a frictional force between the two, and the frictional force forms the damping force of the one-way damping structure 30.

[0064] 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 a frictional force on the rotation of the damping gear 311.

[0065] In this embodiment, a long slot 13 is provided on the fixing frame 10, and the central axis of the meshing gear 32 rotates and slides in the long slot 13. When the lifting rod 20 slides downward, the meshing gear 32 can move downward along the long slot 13 to the meshing position only driven by the rack 21, or can further move downward along the long slot 13 to the meshing position under the action of a gravity force or an elastic force or a magnetic attraction force. Among them, the gravity force can be provided by a counterweight block (not shown) or by increasing the weight of the meshing gear 32 itself, the elastic force can be provided by a spring (not shown), and the magnetic attraction force can be provided by a magnetic attracting member (not shown). With the assistance of the gravity force or the elastic force or the magnetic attraction 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.

[0066] In this embodiment, a roller 40 is also rotatably provided on the fixing frame 10. A sliding rib 22 is provided longitudinally on the lifting rod 20, and the roller 40 is in rolling cooperation with the sliding rib 22. 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 sliding of the lifting rod 20 can be made smoother.

[0067] See Figure 16 and Figure 17 , in this embodiment, specifically, the roller 40 is dumbbell-shaped, and the roller 40 includes two juxtaposed wheel bodies and a wheel shaft 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 further includes an elastic member 50 and an elastic member support seat 51. The elastic member support seat 51 includes a C-shaped ring rotatably fitted with the wheel shaft and an elastic member installation cavity connecting the C-shaped ring. One end of the elastic member 50 is inserted into the elastic member installation cavity, and the other end abuts against the fixing frame 10.

[0068] 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 gland 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 gland 12 is fixedly connected to cover the opening. See Figure 10 , and a long slot 13 is respectively provided at the corresponding positions of the main body 11 and the gland 12.

[0069] In this embodiment, the lifting rod 20 has a longitudinally extending sliding cavity 23. The fixing frame 10 includes a fixing portion for fixing to the wall and an insertion portion inserted into the sliding cavity 23. The insertion portion is provided with a one-way damping structure 30 and is inserted into the sliding cavity 23 from the top opening of the lifting rod 20. The fixing portion is located outside the sliding cavity 23, and an avoidance groove 24 for avoiding the fixing frame 10 is formed on one side of the sliding cavity 23.

[0070] SeeFigure 5 , Figure 11 , Figure 12 and Figure 13 , in order to facilitate the assembly of the lifting rod device, in this embodiment, a snap component 60 for preventing the fixed frame 10 from detaching from the sliding cavity 23 is further provided at the top of the lifting rod 20. Refer to Figure 19 and Figure 20 , during the process of inserting the fixed frame 10 into the sliding cavity 23, the fixed frame 10 pushes against the snap component 60 to make the snap component 60 give way; refer to Figure 5 , when the fixed frame 10 is inserted into the sliding cavity 23 in place, the snap component 60 resets to limit the fixed frame 10 in the sliding cavity 23.

[0071] Specifically, the snap component 60 includes a snap base 61, a sliding buckle 62 and a spring 63. The snap base 61 is fixed to the top of the lifting rod 20 by screws. The sliding buckle 62 is slidably arranged on the snap base 61 and partially protrudes from the snap base 61 under the elastic action of the spring 63. The spring 63 elastically abuts between the snap base 61 and the sliding buckle 62. A guiding inclined surface 621 is provided on the part of the sliding buckle 62 that protrudes from the snap base 61. When the fixed frame 10 just inserts into the sliding cavity 23, the fixed frame 10 makes the sliding buckle 62 slide into the snap base 61 by abutting against the guiding inclined surface 621 to give way to the insertion of the fixed frame 10 into the sliding cavity 23.

[0072] The specific working process of this embodiment is as follows:

[0073] Refer to Figure 5 , Figure 5 is a longitudinal sectional view of the lifting rod 20 in a static state or a pulled-down state. At this time, the meshing gear 32 is in the damping position, and the damping gear 311 of the damper 31 cooperates with the meshing gear 32 to be able 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 makes the lifting rod 20 remain in the static state, thereby realizing the stepless height adjustment of the lifting rod 20. When the lifting rod 20 slides downward, it needs 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, therefore, it is not too laborious to slide the lifting rod 20 downward.

[0074] Refer to Figure 6 , Figure 6 is a state diagram of pushing up the lifting rod 20 along the direction of arrow F in the figure in the state of Figure 5 . When the lifting rod 20 slides upward, it drives the meshing gear 32 to move to the separation position through the rack 21, and the damping gear 311 of the damper 31 is separated from the meshing gear 32 and does not provide a damping force, thereby realizing the easy pushing up of the lifting rod 20.

[0075] Second embodiment:

[0076] Please refer toFigures 21 to 25 The lifting rod device of the second preferred embodiment provided by the present utility model is mainly different from that of the first preferred embodiment in the specific structure of the one-way damping structure. The one-way damping structure of the first preferred embodiment is a clutch-type one-way damping structure, which provides damping or no damping to the lifting rod through the movement of the meshing gear between the damping position and the separating position. While the one-way damping structure of this embodiment is replaced by a ratchet and pawl type one-way damping structure.

[0077] Specifically, the ratchet and pawl type one-way damping structure includes a damping member 31' and a meshing gear 32' meshing with the rack 21'. The damping member 31' includes a ratchet 313 and a friction pad 314. The ratchet 313 forms a frictional force with the fixed frame 10 through the friction pad 314. Similar to the first embodiment, the damping force is also formed through the frictional force. The meshing gear 32' is sleeved outside the ratchet 313. The inner wall of the meshing gear 32' is provided with a first pawl 321, and the outer wall of the ratchet 313 is provided with a second pawl 3131 that cooperates with the first pawl 321. Refer to Figure 21 , when the lifting rod 20 slides upward and drives the meshing gear 32' to rotate forward relative to the ratchet 313 through the rack 21', the first pawl 321 and the second pawl 3131 slide relative to each other, and the meshing gear 32' will not drive the ratchet 313 to rotate. The ratchet 313 will not form a frictional force with the fixed frame 10 through the friction pad 314, so no damping force is provided; when the lifting rod 20 slides downward and drives the meshing gear 32' to rotate backward relative to the ratchet 313 through the rack 21', the first pawl 321 and the second pawl 3131 are engaged, and the meshing gear 32' will drive the ratchet 313 to rotate. The ratchet 313 will further form a frictional force with the fixed frame 10 through the friction pad 314, so that the damping force can be provided. Through the cooperation of the first pawl 321 and the second pawl 3131, different forward and backward rotations of the meshing gear are realized to provide damping or no damping to the lifting rod by the one-way damping structure. The concept is ingenious, the structure is simple, and the one-way damping function is reliable.

[0078] For the structures not described in this embodiment, refer to the first embodiment and will not be elaborated here.

[0079] Third Embodiment (not shown):

[0080] The lifting rod device of the third preferred embodiment provided by the present utility model is mainly different from that of the first preferred embodiment in the specific structure of the one-way damping structure. The one-way damping structure of the first preferred embodiment is a clutch-type one-way damping structure, which provides damping or no damping to the lifting rod through the movement of the meshing gear between the damping position and the separating position. While the one-way damping structure of this embodiment is replaced by a damping oil type one-way damping structure.

[0081] 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.

[0082] 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.

[0083] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model 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 utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

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.

Images