Friction self-locking furniture lifting device and lifting furniture

Abstract

The friction self-locking furniture lifting device comprises a locking shell, a stand column, an upper sliding block, a lower sliding block, an elastic piece and an inhaul cable, the stand column is sleeved with the locking shell, an upper inserting hole and a lower inserting hole are formed in the locking shell, the stand column is sleeved with one end of the upper sliding block and one end of the lower sliding block, and the other end of the upper sliding block and the other end of the lower sliding block are sleeved with the inhaul cable. The other end of the upper sliding block and the other end of the lower sliding block are inserted into the upper inserting hole and the lower inserting hole respectively and can swing up and down in the locking shell, the inhaul cable is directly or indirectly connected with the upper sliding block and the lower sliding block, and the elastic piece enables the upper sliding block and the lower sliding block to be in an inclined state with opposite inclined directions. The lifting device is used for lifting furniture and can stop at any position between the maximum height and the minimum height which can be adjusted on a table top, the elastic piece is arranged, the upper sliding block and the lower sliding block can be reset conveniently when the inhaul cable is loosened, the reset speed of the upper sliding block and the lower sliding block is high through the elastic piece, positioning of the lifting device can be rapidly achieved, and the lifting device is convenient to use. And the precision of the locking position is improved.

Description

Technical Field

[0001] The invention relates to a friction self-locking furniture lifting device and lifting furniture, belonging to the technical field of furniture. Background Art

[0002] Various tables, chairs, bookshelves, display stands and other furniture items that can be raised and lowered and can adjust the height and length generally use an adjustment mechanism with holes and toothed engagement to control the braking and positioning during lifting and retraction, such as the bedside table that can be quickly adjusted up and down disclosed in the Chinese utility model patent with the authorization announcement number CN216723646U, and the multi-stage lifting table disclosed in the invention patent of Taiwan Province of China with the application publication number TW202210004A. The adjustment mechanism with holes and toothed engagement is expensive, and because there is a distance between the holes and the teeth, it can only be locked at the holes or the meshing grooves. In order to ensure the strength and stability of the components and avoid deformation, the distance between the holes is usually set relatively large, and the actual fixed position range of the desktop of the lifting table is small. Since the tooth spacing is usually small, the tooth engagement method is better than the hole method, but due to the existence of the tooth spacing, its actual adjustment range can still be improved. Summary of the invention

[0003] One object of the present invention is to provide a friction self-locking furniture lifting device to solve the technical defects in the prior art that the lifting table adopts a hole and toothed engagement structure to achieve lifting braking positioning, and the position of the adjustment positioning cannot be adjusted arbitrarily due to the limitation of the number of stages.

[0004] To solve the above problems, the technical solution adopted by the present invention is: a friction self-locking furniture lifting device, including a locking shell, a column, an upper slider, a lower slider, an elastic member and a cable, the locking shell is provided with an upper plug hole and a lower plug hole, one end of the upper slider and the lower slider is sleeved on the column, the other ends of the upper slider and the lower slider are respectively inserted into the upper plug hole and the lower plug hole and can swing up and down in the locking shell, the cable directly or indirectly connects the upper slider and the lower slider, the elastic member makes the upper slider and the lower slider in an inclined state in opposite directions when in a relaxed state, the locking shell is locked on the column by the friction force between the upper slider and the lower slider and the column, and the cable is pulled to pull the upper slider and the lower slider to swing in a parallel direction to reduce the friction between the upper slider and the lower slider and the column until the locking shell can be raised and lowered on the column. The present invention adopts an upper slider and a lower slider to cooperate with the column, and the relative angles of the upper slider and the lower slider and the column are adjusted by the swing of the upper slider and the lower slider, thereby changing the friction between the upper slider and the lower slider and the column. Therefore, the upper slider and the lower slider in the present invention can be adjusted to stop at any position on the column. The present invention is used on lifting furniture and can stop at any position between the maximum height and the minimum height that the furniture table can adjust. The present invention arranges an elastic member to facilitate the resetting of the upper slider and the lower slider when the cable is released, and the elastic member makes the resetting speed of the upper slider and the lower slider fast, which can quickly realize the positioning of the present invention and improve the accuracy of the locking position of the present invention.

[0005] As a further improvement of the present invention, a limit block is also included for limiting the swing of the upper slider and the lower slider from the end away from the upper plug hole and the lower plug hole. When the upper slider and the lower slider swing to abut against the limit block, the upper slider is parallel to the lower slider. The present invention sets a limit block to abut against the upper slider and the lower slider to limit the swing of the upper slider and the lower slider, so as to avoid the upper slider and the lower slider swinging too much and generating a large friction with the column again to prevent the locking shell from sliding relative to the column, thereby affecting the adjustment of the locking shell.

[0006] As a further improvement of the present invention, a cable hole is provided on the upper slider and passes through the upper slider, a pulley is provided on the upper surface of the lower slider, and the end of the cable passes through the upper slider from the cable hole and is fixed to the upper slider after passing around the pulley. In the present invention, the cable directly pulls the upper slider to swing downward, and because the cable passes around the pulley on the lower slider, the cable pulls the lower slider to swing upward through the pulley. Since the present invention uses one cable to pull the upper slider and the lower slider to swing, the upper slider and the lower slider in the present invention swing at the same time, and the swinging directions are opposite.

[0007] As a further improvement of the present invention, a cable hole is provided on the upper slider and passes through the upper slider, a wire tube is provided on the cable, the end of the wire tube is fixed to the upper slider, and the cable passes through the cable hole and is fixedly connected to the lower slider. In the present invention, the cable moves in the wire tube, the cable pulls the lower slider to swing, and the wire tube pushes the upper slider to swing, so that the upper slider and the lower slider swing simultaneously and in opposite directions. The connection structure of the cable with this structure and the upper slider and the lower slider is simpler.

[0008] As a further improvement of the present invention, the elastic member is a pressure spring sleeved on the column, the pressure spring is located between the upper slider and the lower slider, and its upper and lower ends respectively resist the upper slider and the lower slider, and the pressure spring is compressed when the cable pulls the upper slider to swing downward and the lower slider to swing upward, and when the cable is released, the pressure spring stretches and pushes the upper slider to swing upward and the lower slider to swing downward. The pressure spring in the present invention is sleeved on the column, and is used to push the upper slider and the lower slider upward and downward respectively, so that the upper slider and the lower slider are in an inclined state, maintain the friction between the upper slider and the lower slider and the column, ensure the locking state of the locking shell and the column, and when the upper slider and the lower slider swing to release the lock, the pressure spring contracts and stores force.

[0009] As a further improvement of the present invention, the limit block is a limit protrusion arranged on the locking housing, the limit protrusion is located between the upper slider and the lower slider, when the upper slider swings downward to a horizontal state, the lower surface of the upper slider abuts against the top of the limit protrusion, and when the lower slider swings upward to a horizontal state, the upper surface of the lower slider abuts against the bottom of the limit protrusion. The present invention can swing and limit the upper slider and the lower slider from both sides of the upper slider and the lower slider, so that the force on the upper slider and the lower slider is more uniform.

[0010] As a further improvement of the present invention, it also includes a release block that is sleeved on the column and located between the upper slider and the lower slider. When the locking shell is locked on the column, the end of the upper slider away from the upper plug hole is tilted downward, and the end of the lower slider away from the lower plug hole is tilted upward. Both sides of the release block are rotatably connected to the locking shell and can swing relative to the column. One end of the release block is connected to a cable, and the cable pulls the release block to swing. The upper and lower ends of the release block respectively abut against the lower surface of the upper slider and the upper surface of the lower slider and push the upper slider and the lower slider to swing upward and downward respectively until the locking shell is unlocked from the column. The present invention sets a release block, and the release block swings relative to the locking shell. The two ends of the release block respectively push the upper slider and the lower slider to swing. The cable can be connected to the end of the release block, so that the present invention pulls the upper slider and the lower slider to swing more labor-saving.

[0011] As a further improvement of the present invention, the elastic member includes an upper pressure spring and a lower pressure spring sleeved on the column, the top and bottom ends of the upper pressure spring respectively abut against the upper surface of the locking shell and the upper slider, the top and bottom ends of the lower pressure spring respectively abut against the lower surface of the lower slider and the shell, when the release block pushes the upper slider to swing upward and the lower slider to swing downward, the upper slider and the lower slider compress the upper pressure spring and the lower pressure spring respectively, and when the cable is released, the upper pressure spring and the lower pressure spring respectively push the upper slider to swing downward and the lower slider to swing upward. Since the present invention pushes the upper slider and the lower slider to swing by the release block, the upper slider tilts downward and the lower slider tilts upward in the locked state, so the present invention sets an upper pressure spring to push the upper slider to swing downward, and sets a lower pressure spring to push the lower slider to swing upward, to ensure that after the adjustment is completed, the upper slider and the lower slider are reset and swung downward and upward to the locked position respectively.

[0012] As a further improvement of the present invention, the limit block includes an upper limit protrusion on the inner surface of the locking shell and a lower limit protrusion on the inner surface of the locking shell, and when the upper slider swings upward to abut against the upper limit protrusion and the lower slider swings downward to abut against the lower limit protrusion, the upper slider is parallel to the lower slider and both are in a horizontal state. In the present invention, since the upper slider swings upward and the lower slider swings downward to release the lock, the present invention limits the upper slider and the lower slider from above and below respectively.

[0013] As a further improvement of the present invention, the locking housing satisfies the following conditions when it is locked on the column:

[0014]

[0015] Wherein: T is the distance between the inner surface of the locking housing on one side where the upper and lower plug holes are provided and the center of the column along the length direction of the upper slider or the lower slider;

[0016] D is the width of the hole on the upper and lower sliders through which the column passes vertically when the upper and lower sliders are in a horizontal state;

[0017] S is the thickness of the upper and lower sliders;

[0018] d is the width of the column, and D>d;

[0019] μ1 is the friction coefficient between the upper and lower sliders and the side of the column away from the upper socket;

[0020] μ2 is the friction coefficient between the upper slider, the lower slider and the column on the side close to the upper socket.

[0021] Another object of the present invention is to provide a lifting furniture to solve the technical defect that the table top of the lifting furniture in the prior art cannot be adjusted to any height.

[0022] In order to solve the above problems, the technical solution adopted by the present invention is: lifting furniture, including a table top, an elastic power body, a base, a control handle and a sliding sleeve assembly composed of a sliding outer sleeve and a sliding inner sleeve slidingly matched, the top of the sliding sleeve assembly is fixedly connected to the table top, the base is fixedly connected to the bottom of the sliding sleeve assembly, the elastic power body is arranged in the sliding sleeve assembly and connects the table top and the base or the bottom of the sliding sleeve assembly, the control handle is arranged on the lower surface of the table top, and a friction self-locking furniture lifting device is arranged in the sliding sleeve assembly, wherein the bottom end of the column is fixedly connected to the base or the bottom of the sliding sleeve assembly, the locking shell is fixedly installed on the sliding sleeve assembly, and the cable extends from the upper part of the sliding sleeve assembly and is connected to the control handle. The friction self-locking furniture lifting device used in the present invention, because the shell can be locked at any position on the column, the table top in the present invention can stop at any position between the highest position and the lowest position that the table top can adjust, so the actual adjustment range of the table top in the present invention is larger.

[0023] As a further improvement of the present invention, the sliding outer sleeve is mounted on the sliding inner sleeve, the bottom end of the sliding outer sleeve is fixedly connected to the base, a table top fixing plate is fixed to the top of the sliding inner sleeve, the table top fixing plate is fixedly connected to the table top, the cylinder of the elastic power body is connected to the table top fixing plate, the piston rod of the elastic power body is fixedly connected to the base or the bottom of the sliding sleeve assembly, and the cable extends out of the sliding sleeve assembly from the upper part of the sliding inner sleeve. The sliding outer sleeve of the present invention is fixed, and the sliding inner sleeve slides relative to the sliding outer sleeve, so that the structure of the sliding sleeve assembly is more stable, thereby improving the structural stability of the entire lifting furniture.

[0024] As a further improvement of the present invention, a sliding jacket bottom plate is fixed to the lower part of the sliding jacket, the sliding jacket bottom plate is fixedly connected to the base, and the bottom end of the column and the piston rod of the elastic power body are fixedly connected to the sliding jacket bottom plate. The present invention provides a sliding jacket bottom plate, which facilitates the fixed connection between the sliding jacket assembly and the base, and also facilitates the fixing of the column and the fixing of the elastic power body and the piston rod.

[0025] As a further improvement of the present invention, a plurality of casters are provided on the base, and the casters are casters with foot brakes. The present invention is provided with casters to facilitate the present invention to be moved to a desired position as required, and the casters with foot brakes are used to facilitate the fixing of the position of the present invention in the use state.

[0026] In summary, the beneficial effects of the present invention are as follows: the friction self-locking furniture lifting device of the present invention, the locking shell can stay at any position on the column, and when it is applied to lifting furniture, the table top of the lifting furniture can be fixed at any position between the maximum adjustable height and the minimum adjustable height, thereby increasing the actual adjustable range of the lifting furniture table top. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the installation of the upper slider and the locking housing.

[0028] Figure 2 It is a cross-sectional schematic diagram of the height adjustment state of the lifting table using Example 1 of the present invention.

[0029] Figure 3 It is a cross-sectional schematic diagram of the height locking state of the lifting table of Example 1 of the present invention.

[0030] Figure 4 yes Figure 2 A partial enlarged view of point A in the middle.

[0031] Figure 5 yes Figure 3 A partial enlarged view of point B in the middle.

[0032] Figure 6 It is a cross-sectional schematic diagram of the height adjustment state of the lifting table using Example 2 of the present invention.

[0033] Figure 7 It is a cross-sectional schematic diagram of the height locking state of the lifting table according to Example 2 of the present invention.

[0034] Figure 8 yes Figure 6 A partial enlarged view of point D in the middle.

[0035] Fig. 9 yes Figure 7 A partial enlarged view of point E in the middle.

[0036] Fig.10 It is a cross-sectional schematic diagram of the height adjustment state of the lifting table using Example 3 of the present invention.

[0037] Fig.11 It is a cross-sectional schematic diagram of the height locking state of the lifting table according to Example 3 of the present invention.

[0038] Fig.12 yes Fig.10 A partial enlarged view of point F in the middle.

[0039] Fig.13 yes Fig.11 A partial enlarged view of point G in the middle.

[0040] Wherein: 1. locking shell; 2. column; 3. upper slider; 4. lower slider; 5. cable; 6. upper plug hole; 7. lower plug hole; 8. cable hole; 9. pulley; 10. wire tube; 11. pressure spring; 12. limit protrusion; 13. release block; 14. upper pressure spring; 15. lower pressure spring; 16. upper limit protrusion; 17. lower limit protrusion; 18. table; 19. elastic power body; 20. base; 21. control handle; 22. sliding outer sleeve; 23. sliding inner sleeve; 24. table fixing plate; 25. sliding outer sleeve bottom plate; 26. caster; 27. pulley support frame; 28. rope fixing buckle; 101. fixing plate; 102. top plate; 103. bottom plate; 104. side plate; 105. upper through hole A; 106. lower through hole A; 131. connecting block.

[0041] Embodiment

[0042] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings.

[0043] Example 1

[0044] like Figure 4 and Figure 5 The friction self-locking furniture lifting device shown in the figure comprises a locking shell 1, a column 2, an upper slider 3, a lower slider 4, an elastic member and a cable 5. The locking shell 1 is sleeved on the column 2. The locking shell 1 comprises a vertical fixing plate 101, a top plate 102, a bottom plate 103 and two parallel side plates 104. One side of the two side plates 104 is fixedly connected to the fixing plate 101, one end of the top plate 102 and the bottom plate 103 is fixedly connected to the fixing plate 101, and the top of the fixing plate 101 is higher than The upper surface of the top plate 102 and the bottom end of the fixed plate 101 are lower than the lower surface of the bottom plate 103. The top and bottom ends of the two side plates 104 are fixedly connected to the top plate 102 and the bottom plate 103 respectively. An upper through hole A105 and a lower through hole A106 with the same cross-sectional shape as the column 2 are respectively opened on the top plate 102 and the bottom plate 103. The column 2 is in a vertical state and passes through the upper through hole A105 and the lower through hole A106, and the locking shell 1 is sleeved on the column 2.

[0045] like Figure 1 , Figure 4 and Figure 5As shown, an upper plug hole 6 and a lower plug hole 7 are provided on the fixing plate 101 of the locking shell 1, and the upper slider 3 and the lower slider 4 have the same structure, both of which are rectangular plate structures. An upper through hole B and a lower through hole B with the same cross-sectional shape as the cross-sectional shape of the column 2 are provided on the ends of the upper slider 3 and the lower slider 4 away from the fixing plate 101, respectively. The upper through hole B and the lower through hole B are of the same size. The column 2 passes through the upper through hole B and the lower through hole B so that the upper slider 3 and the lower slider 4 are sleeved on the column 2, and the cross-sectional dimensions of the upper through hole B and the lower through hole B are both larger than the dimensions of the cross-sectional shape of the column 2 to ensure that the upper slider 3 and the lower slider 4 can swing relative to the column 2, and the other ends of the upper slider 3 and the lower slider 4 are respectively inserted into the upper plug hole 6 and the lower plug hole 7 and can swing up and down in the locking shell 1. The specific implementation method is to set the height of the upper plug hole 6 and the lower plug hole 7 to be larger than the thickness of the upper slider 3 and the lower slider 4, respectively.

[0046] like Figure 4 and Figure 5 As shown, the cable 5 directly or indirectly connects the upper slider 3 and the lower slider 4. The elastic member makes the upper slider 3 and the lower slider 4 in an inclined state in opposite directions when in a relaxed state. The locking housing 1 is locked on the column 2 by the friction between the upper slider 3 and the lower slider 4 and the column 2. For example, the end of the upper slider 3 away from the fixed plate 101 is tilted upward, while the end of the lower slider 4 away from the fixed plate 101 is tilted downward, or the end of the upper slider 3 away from the fixed plate 101 is tilted downward, while the end of the lower slider 4 away from the fixed plate 101 is tilted upward. 4 is tilted, so resistance is generated between its two sides and the column 2 to prevent the upper slider 3 and the lower slider 4 from sliding downward and upward, so as to achieve locking between the locking housing 1 and the column 2. The pulling cable 5 is used to pull the upper slider 3 and the lower slider 4 to swing in a parallel direction to reduce the friction between the upper slider 3 and the lower slider 4 and the column 2 until the locking housing 1 can be raised and lowered on the column 2. When the upper slider 3 and the lower slider 4 are pulled to be parallel and both are in a horizontal state, the upper slider 3 and the lower slider 4 are not in contact with the column 2, and there is no friction between the upper slider 3 and the lower slider 4 and the column 2.

[0047] When the locking shell 1 is subjected to downward pressure, the friction force between the upper slider 3 and the column 2 is upward, preventing the locking shell 1 from sliding downward along the column 2. At this time, there is no friction force between the lower slider 4 and the column 2, or there is only a small friction force. When the locking shell 1 is subjected to an upward lifting force, the friction force between the lower slider 4 and the column 2 is downward, preventing the locking shell 1 from sliding upward along the column 2. At this time, there is no friction force between the upper slider 3 and the column 2, or there is only a small friction force.

[0048] The distance between the inner surface of the side where the upper insertion hole 6 and the lower insertion hole 7 of the locking housing 1 are opened (i.e., the surface of the fixing plate 101 close to the column 2) and the center of the column 2 along the length direction of the upper slider 3 or the lower slider 4 is T, that is, the distance between the force point transmitted from the locking housing 1 to the upper slider 3 or the lower slider 4 and the center of the column 2 along the length direction of the upper slider 3 or the lower slider 4, and the upper through hole B and the lower through hole B on the upper slider 3 and the lower slider 4 for the column 2 to pass vertically when the upper slider 3 and the lower slider 4 are in a horizontal state The width is D. The optimal upper through hole B and lower through hole B in this embodiment are both circular holes. The column 2 is cylindrical. D is the aperture of the upper through hole B and the lower through hole B. The thickness of the upper slider 3 and the lower slider 4 are both S. The width of the column 2 is d. Since the column 2 is a cylinder, d is the diameter of the column 2, and D>d. The friction coefficient between the upper slider 3 and the lower slider 4 and the side of the column 2 away from the upper socket 6 is μ1, and the friction coefficient between the upper slider 3 and the lower slider 4 and the side of the column 2 close to the upper socket 6 is μ2.

[0049] Next, the force applied to the lower slider 4 when the locking housing 1 is lifted upward is analyzed. 力 When , the vertical distance between the contact point of the lower slider 4 on the side close to the fixed plate 101 and the contact point on the side away from the fixed plate 101 and the column 2 is Y, C is the horizontal distance between the column 2 and the side facing the fixed plate 101, that is, the horizontal distance between the force point of the locking housing 1 and the side of the column 2 close to the fixed plate 101. At this time, the pressure of the lower slider 4 on the side away from the fixed plate 101 is F1, and the pressure of the lower slider 4 on the side close to the fixed plate 101 is F2, then:

[0050]

[0051] When the locking housing 1 is subjected to a downward pressing force F 力 When the upper slider 3 is subjected to the same force as the lower slider 4, the conditions to be satisfied are also the same, which will not be described in detail in this embodiment.

[0052] like Figure 4 and Figure 5 As shown, in order to prevent the upper slider 3 and the lower slider 4 from swinging too much when the self-locking housing 1 is vertically adjusted, exceeding the horizontal state and generating friction with the column 2 again, a limit block is provided on the locking housing 1 of this embodiment for limiting the swing of the upper slider 3 and the lower slider 4 from the end away from the upper plug hole 6 and the lower plug hole 7. When the upper slider 3 and the lower slider 4 are swung to the state of abutting against the limit block, the upper slider 3 is parallel to the lower slider 4.

[0053] like Figure 4 and Figure 5As shown, in this embodiment, a cable hole 8 is opened on the upper slider 3 between the upper plug hole 6 and the column 2, and a cable through hole is opened on the top plate of the locking shell 1 above the cable hole 8. The cable 5 extends into the locking shell 1 from the cable through hole. A pulley support frame 27 is fixed to the upper surface of the lower slider 4, and a pulley 9 is rotatably provided on the pulley support frame 27. The end of the cable 5 passes through the upper slider 3 downward from the cable hole 8 and is fixed to the upper slider 3 by a rope fixing buckle 28 after bypassing the pulley 9. In this embodiment, when the locking shell 1 is locked on the column 2, the end of the upper slider 3 away from the upper plug hole 6 is tilted upward, and the end of the lower slider 4 away from the lower plug hole 7 is tilted downward. The cable 5 pulls the upper slider 3 and the lower slider 4 to swing toward each other until the locking shell 1 and the column 2 are unlocked.

[0054] like Figure 4 and Figure 5 As shown, in this embodiment, the elastic member is a pressure spring 11 mounted on the column 2, and the pressure spring 11 is located between the upper slider 3 and the lower slider 4. The upper and lower ends of the pressure spring 11 respectively press against the upper slider 3 and the lower slider 4. When the cable 5 pulls the upper slider 3 to swing downward and the lower slider 4 to swing upward, the pressure spring 11 is compressed. When the cable 5 is released, the pressure spring 11 stretches and pushes the upper slider 3 to swing upward and the lower slider 4 to swing downward until the locking shell 1 is locked on the column 2.

[0055] like Figure 4 and Figure 5 As shown, the limit block in this embodiment includes two limit protrusions 12 arranged opposite to each other on the two side plates 104 of the locking shell 1, which are located on the upper slider 3 and the lower slider 4. The two limit protrusions 12 are located between the upper slider 3 and the lower slider 4. The two limit protrusions 12 have equal heights, their top ends are located on the same horizontal plane, and their bottom ends are also located on the same horizontal plane. When the upper slider 3 swings downward to a horizontal state, the two sides of the lower surface of the upper slider 3 respectively abut against the top ends of the two limit protrusions 12, and when the lower slider 4 swings upward to a horizontal state, the two sides of the upper surface of the lower slider 4 respectively abut against the bottom ends of the two limit protrusions 12. When the upper slider 3 and the lower slider 4 abut against the limit protrusions 12, they cannot continue to swing, thereby limiting the swinging angles of the upper slider 3 and the lower slider 4, so that the upper slider 3 and the lower slider 4 can only swing to a horizontal state at most.

[0056] Example 2

[0057] This embodiment is an improvement made on the basis of the embodiment 1. Compared with the embodiment 1, the difference of this embodiment is that the connection mode of the cable 5 and the upper slider 3 and the lower slider 4 is different. Figures 6 to 9When the locking nut 1 is in the state of being locked on the column 2, the end of the upper slider 3 and the lower slider 4 are fixedly connected by a rope fixing buckle 28. The structure of the rest of the present embodiment is the same as that of the embodiment 1, and the details may be referred to the embodiment 1, and the present embodiment will not be described in detail. When the present embodiment is used to make lifting furniture, the sliding inner sleeve of the lifting furniture is used as the locking shell 1.

[0058] Example 3

[0059] This embodiment is an improvement made on the basis of the embodiment 1 or the embodiment 2. Compared with the embodiment 1 or the embodiment 2, the difference of this embodiment is that the connection mode of the cable 5 with the upper slider 3 and the lower slider 4 is different. The cable 5 in the embodiment 1 or the embodiment 2 is directly connected with the upper slider 3 and the lower slider 4, while the cable 5 in this embodiment is indirectly connected with the upper slider 3 and the lower slider 4. Fig.12 and Fig.13As shown, specifically: this embodiment has a release block 13 which is sleeved on the column 2 and located between the upper slider 3 and the lower slider 4. The release block 13 in this embodiment is a long plate-shaped structure. A column through hole penetrating the upper and lower sides thereof is provided on the release block 13. The column 2 passes through the column through hole so that the release block 13 is sleeved on the column 2. The aperture of the column through hole is larger than the diameter of the column 2 to ensure that the release block 13 can swing relative to the column 2. When the locking shell 1 is locked on the column 2, the end of the upper slider 3 away from the upper plug hole 6 is tilted downward, and the end of the lower slider 4 away from the lower plug hole 7 is tilted upward. Both sides of the release block 13 are rotatably connected to the locking shell 1 and can swing relative to the column 2. This embodiment has a circular mounting hole on each of the two side panels, and a connecting shaft is fixed on each side of the release block 13. The two connecting shafts are respectively inserted into the two mounting holes so that the release block 13 can swing relative to the locking shell 1. One end of the release block 13 is connected to the cable 5. In this embodiment, the middle part of the release block 13 is bent upward in an arc shape, and a connecting block 131 is fixed to the lower part of the end of the release block 13 away from the fixed plate 101. The connecting block 131 protrudes in the direction away from the fixed plate. The connecting block 131 is fixedly connected to the end of the cable 5. The end of the release block 13 is used to abut against the edges of the upper slider 3 and the lower slider 4 for chamfering to reduce damage to the upper slider 3 and the lower slider 4. The cable 5 pulls the release block 13 to swing, and the upper and lower ends of the release block 13 respectively abut against the lower surface of the upper slider 3 and the upper surface of the lower slider 4, and push the upper slider 3 and the lower slider 4 to swing upward and downward respectively until the locking shell 1 is unlocked from the column 2.

[0060] The elastic member in this embodiment includes an upper pressure spring 14 and a lower pressure spring 15 which are sleeved on the column 2. The top and bottom ends of the upper pressure spring 14 respectively press against the lower surface of the top plate of the locking shell 1 and the upper surface of the upper slider 3, and the top and bottom ends of the lower pressure spring 15 respectively press against the lower surface of the lower slider 4 and the upper surface of the bottom plate of the locking shell 1. When the release block 13 pushes the upper slider 3 to swing upward and the lower slider 4 to swing downward, the upper slider 3 and the lower slider 4 compress the upper pressure spring 14 and the lower pressure spring 15 respectively. When the cable 5 is released, the upper pressure spring 14 and the lower pressure spring 15 respectively push the upper slider 3 to swing downward and the lower slider 4 to swing upward, so that the locking shell 1 is locked on the column 2.

[0061] The limit block in this embodiment includes an upper limit protrusion 16 on the lower surface of the top plate of the locking housing 1 away from the end of the fixed plate 101 and a lower limit protrusion 17 on the upper surface of the bottom plate of the locking housing 1 away from the end of the fixed plate 101. When the upper slider 3 swings upward to abut against the upper limit protrusion 16 and the lower slider 4 swings downward to abut against the lower limit protrusion 17, the upper slider 3 is parallel to the lower slider 4 and both are in a horizontal state. The structure of the rest of this embodiment is the same as that of embodiment 1 or embodiment 2, and the details can be referred to embodiment 1 or embodiment 2, and this embodiment will not be repeated.

[0062] Example 4

[0063] like Figure 2 , Figure 3 , Figure 6 , Figure 7 , Fig.10 and Fig.11 As shown, the technical solution of this embodiment is lifting furniture, including a table top 18, an elastic power body 19, a base 20, a control handle 21 and a sliding sleeve assembly consisting of a sliding outer sleeve 22 and a sliding inner sleeve 23 that slide together, wherein the cross-sectional shapes of the sliding outer sleeve 22 and the sliding inner sleeve 23 are both rectangular, and the sliding cooperation method between the two is the existing technology, which will not be described in detail in this embodiment. The top of the sliding sleeve assembly is fixedly connected to the table top 18, and the base 20 is fixedly connected to the bottom end of the sliding sleeve assembly. The height of the table top 18 can be adjusted as needed through the relative sliding of the sliding outer sleeve 22 and the sliding inner sleeve 23. The elastic power body 19 in this embodiment is arranged in the sliding sleeve assembly and connects the table top 18 and the base 20 or the bottom of the sliding sleeve assembly. The control handle 21 is detachably mounted on the lower surface of the table top 18 by multiple screws. The elastic power body 19 in this embodiment adopts a gas spring, and the piston rod of the gas spring can also be used as a column 2. The control handle 21 is the existing technology, which will not be described in detail in this embodiment.

[0064] In this embodiment, a friction self-locking furniture lifting device described in any one of embodiments 1 to 3 is arranged in a sliding sleeve assembly, wherein the bottom end of the column 2 of the friction self-locking furniture lifting device is fixedly connected to the base 20 or the bottom of the sliding sleeve assembly and the column 2 is in a vertical state, and the fixing plate 101 of the locking shell 1 is detachably mounted on the sliding sleeve assembly by a plurality of bolts. When the friction self-locking furniture lifting device is unlocked, the table 18 is pressed downward to adjust the height of the table 18 downward. When the table 18 is adjusted downward, the piston rod of the gas spring contracts, and the height of the table 18 is adjusted upward by extending the piston rod of the gas spring when the friction self-locking furniture lifting device is unlocked. The cable 5 in this embodiment extends from the upper part of the sliding sleeve assembly and is connected to the control handle 21. The cable 5 is pulled by pulling the control handle 21 to swing the upper slider 3 and the lower slider 4, wherein: Figure 2 and Figure 3 The friction self-locking furniture lifting device of embodiment 1 is adopted; Figure 6 and Figure 7 The friction self-locking furniture lifting device of Example 2 is used, wherein the locking housing 1 of the friction self-locking furniture lifting device and the sliding inner sleeve 23 of the lifting furniture are the same complete component; Fig.10 and Fig.11 The friction self-locking furniture lifting device of Example 3 was adopted.

[0065] The sliding outer sleeve 22 is sleeved on the sliding inner sleeve 23. In this embodiment, the bottom end of the sliding outer sleeve 22 is preferably fixedly connected to the base 20. A table fixing plate 24 is fixed to the top of the sliding inner sleeve 23. The table fixing plate 24 is horizontal. The table fixing plate 24 and the table 18 are detachably connected by multiple bolts. The cylinder end of the gas spring is connected to the table fixing plate 24 by a connecting pin. The piston rod end of the gas spring is fixedly connected to the base 20 or the bottom of the sliding sleeve assembly. The piston rod of the gas spring is vertically extended and retracted. The cable 5 extends out of the sliding sleeve assembly from the upper part of the sliding inner sleeve 23 and is connected to the control handle 21. The upper and lower ends of the fixing plate 101 of the locking shell 1 are detachably mounted on the inner surface of the bottom of the sliding inner sleeve 23 of the sliding sleeve assembly by multiple bolts.

[0066] In this embodiment, a sliding jacket bottom plate 25 is fixed to the lower part of the sliding jacket 22. The sliding jacket bottom plate 25 is a rectangular plate and is arranged in the sliding jacket 22. The four sides of the sliding jacket bottom plate 25 are welded and fixed to the inner surface of the sliding jacket 22. A space of at least the thickness of a nut is left between the lower surface of the sliding jacket bottom plate 25 and the bottom end of the sliding jacket 22. The sliding jacket bottom plate 25 is fixedly connected to the base 20. A plurality of bolts are arranged on the base 20. The bolts pass upward through the sliding jacket bottom plate 25 and are connected to the sliding jacket. The bottom plate 25 is threadedly matched, and the sliding sleeve bottom plate 25 is fixed to the base 20, so that the sliding sleeve 22 is fixed on the base 20. A screw with a diameter slightly smaller than that of the column 2 is fixed to the bottom end of the column 2. The screw passes downward through the sliding sleeve bottom plate 25 and is pressed against the sliding sleeve bottom plate 25 by a nut to achieve a fixed connection between the column 2 and the sliding sleeve 22. In this embodiment, the piston rod of the gas spring is also fixedly connected to the sliding sleeve bottom plate 25, and its fixed connection method is the same as the fixed connection method between the column 2 and the sliding sleeve bottom plate 25.

[0067] In order to facilitate the movement of the lifting furniture as needed during use, a plurality of casters 26 are provided on the base 20 of this embodiment. The position of the lifting table can be moved by rotating the casters 26. In this embodiment, the casters 26 are preferably casters 26 with foot brakes. The lifting furniture of this embodiment can be a lifting table or a lifting chair, etc. Figures 2 to 11 The illustrations are all based on an example of a lift table.

[0068] When the height of the table 18 needs to be adjusted upward, the control handle 21 is pulled, and the control handle 21 pulls the upper slider 3 and the lower slider 4 to swing to a horizontal state, so that the locking shell 1 and the column 2 are unlocked. At this time, the gas spring piston rod is extended to push the table 18 upward to the desired height, and then the control handle 21 is released, and the elastic member pushes the upper slider 3 and the lower slider 4 to swing to a tilted state, so that the locking shell 1 and the column 2 are in a locked state. If the height of the table 18 needs to be adjusted downward, the control handle 21 is pulled, and the control handle 21 pulls the upper slider 3 and the lower slider 4 to swing to a horizontal state, so that the locking shell 1 and the column 2 are unlocked, the table 18 is pressed downward to move the table 18 downward to the desired height, and then the control handle 21 is released, and the elastic member pushes the upper slider 3 and the lower slider 4 to swing to a tilted state, so that the locking shell 1 and the column 2 are in a locked state. In the process of pressing the table 18 downward, the piston rod of the gas spring contracts and stores energy.

[0069] The parts not specifically described in the above description are all prior art, or can be implemented by prior art. Moreover, the specific implementation cases described in the present invention are only preferred implementation cases of the present invention, and are not used to limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made according to the content of the patent scope of the present invention should be regarded as the technical scope of the present invention.

Claims

1. Friction self-locking furniture lifting device, characterized by: The invention comprises a locking shell (1), a column (2), an upper slider (3), a lower slider (4), an elastic member and a cable (5); an upper plug hole (6) and a lower plug hole (7) are provided on the locking shell (1); one end of the upper slider (3) and the lower slider (4) are sleeved on the column (2); the other ends of the upper slider (3) and the lower slider (4) are respectively inserted into the upper plug hole (6) and the lower plug hole (7) and can swing up and down in the locking shell (1); the cable (5) is directly or indirectly connected to the upper slider (3) and the lower slider (4) The elastic member, in a relaxed state, causes the upper slider (3) and the lower slider (4) to be in an inclined state in opposite directions, and the locking housing (1) is locked on the column (2) by the friction between the upper slider (3) and the lower slider (4) and the column (2). The pulling cable (5) is used to pull the upper slider (3) and the lower slider (4) to swing in a parallel direction, thereby reducing the friction between the upper slider (3) and the lower slider (4) and the column (2) until the locking housing (1) can be raised and lowered on the column (2).

2. The friction self-locking furniture lifting device according to claim 1, characterized in that: It also includes a limit block for limiting the swing of the upper slider (3) and the lower slider (4) from an end away from the upper plug hole (6) and the lower plug hole (7); when the upper slider (3) and the lower slider (4) swing to abut against the limit block, the upper slider (3) is parallel to the lower slider (4).

3. The friction self-locking furniture lifting device according to claim 2, characterized in that: The upper slider (3) is provided with a cable hole (8) passing through it from top to bottom, and a pulley (9) is arranged on the upper surface of the lower slider (4). The end of the cable (5) passes through the upper slider (3) from the cable hole (8) downwards and is fixed to the upper slider (3) after passing around the pulley (9).

4. The friction self-locking furniture lifting device according to claim 2, characterized in that: The upper slider (3) is provided with a cable hole (8) passing through it from top to bottom, the cable (5) is sleeved with a wire tube (10), the end of the wire tube (10) can abut against the upper slider (3), and the cable (5) passes through the cable hole (8) and is fixedly connected to the lower slider (4).

5. The friction self-locking furniture lifting device according to claim 3 or 4, characterized in that: The elastic member is a pressure spring (11) sleeved on the column (2). The pressure spring (11) is located between the upper slider (3) and the lower slider (4), and its upper and lower ends respectively abut against the upper slider (3) and the lower slider (4). When the cable (5) pulls the upper slider (3) to swing downward and the lower slider (4) to swing upward, the pressure spring (11) is compressed. When the cable (5) is released, the pressure spring (11) stretches to push the upper slider (3) to swing upward and the lower slider (4) to swing downward.

6. The friction self-locking furniture lifting device according to claim 3 or 4, characterized in that: The limit block is a limit protrusion (12) arranged on the locking housing (1); the limit protrusion (12) is located between the upper slider (3) and the lower slider (4); when the upper slider (3) swings downward to a horizontal state, the lower surface of the upper slider (3) abuts against the top end of the limit protrusion (12); when the lower slider (4) swings upward to a horizontal state, the upper surface of the lower slider (4) abuts against the bottom end of the limit protrusion (12).

7. The friction self-locking furniture lifting device according to claim 2, characterized in that: The invention also comprises a release block (13) which is sleeved on the column (2) and located between the upper slider (3) and the lower slider (4); when the locking shell (1) is locked on the column (2), one end of the upper slider (3) away from the upper plug hole (6) is tilted downward, and one end of the lower slider (4) away from the lower plug hole (7) is tilted upward; both sides of the release block (13) are rotatably connected to the locking shell (1) and can swing relative to the column (2); one end of the release block (13) is connected to the cable (5), and the cable (5) pulls the release block (13) to swing; the upper and lower ends of the release block (13) respectively abut against the lower surface of the upper slider (3) and the upper surface of the lower slider (4) and push the upper slider (3) and the lower slider (4) to swing upward and downward respectively until the locking shell (1) and the column (2) are unlocked.

8. The friction self-locking furniture lifting device according to claim 7, characterized in that: The elastic member comprises an upper pressure spring (14) and a lower pressure spring (15) which are sleeved on the column (2); the top and bottom ends of the upper pressure spring (14) respectively abut against the upper surface of the locking shell (1) and the upper slider (3); the top and bottom ends of the lower pressure spring (15) respectively abut against the lower surface of the lower slider (4) and the locking shell (1); when the release block (13) pushes the upper slider (3) to swing upward and the lower slider (4) to swing downward, the upper slider (3) and the lower slider (4) respectively compress the upper pressure spring (14) and the lower pressure spring (15); when the cable (5) is released, the upper pressure spring (14) and the lower pressure spring (15) respectively push the upper slider (3) to swing downward and the lower slider (4) to swing upward.

9. The friction self-locking furniture lifting device according to claim 1, characterized in that: When the locking housing (1) is locked on the column (2), the following conditions are met: Wherein: T is the distance between the inner surface of the locking housing (1) on one side where the upper insertion hole (6) and the lower insertion hole (7) are provided and the center of the column (2) along the length direction of the upper slider (3) or the lower slider (4); D is the width of the holes on the upper slider (3) and the lower slider (4) through which the pillar (2) vertically passes when the upper slider (3) and the lower slider (4) are in a horizontal state; S is the thickness of the upper slider (3) and the lower slider (4); d is the width of the column (2), and D>d; μ1 is the friction coefficient between the upper slider (3) and the lower slider (4) and the column (2) on the side away from the upper plug hole (6); μ2 is the friction coefficient between the upper slider (3) and the lower slider (4) and the column (2) on the side close to the upper plug hole (6).

10. A lifting furniture, comprising a table top (18), an elastic power body (19), a base (20), a control handle (21), and a sliding sleeve assembly composed of a sliding outer sleeve (22) and a sliding inner sleeve (23) slidingly matched, wherein the top end of the sliding sleeve assembly is fixedly connected to the table top (18), the base (20) is fixedly connected to the bottom end of the sliding sleeve assembly, the elastic power body (19) is arranged in the sliding sleeve assembly and connects the table top (18) and the base (20) or the bottom of the sliding sleeve assembly, and the control handle (21) is arranged on the lower surface of the table top (18), characterized in that: A friction self-locking furniture lifting device as described in any one of claims 1 to 9 is arranged in the sliding sleeve assembly, wherein the bottom end of the column (2) is fixedly connected to the base (20) or the bottom of the sliding sleeve assembly, the locking shell (1) is fixedly installed on the sliding sleeve assembly, and the cable (5) extends from the upper part of the sliding sleeve assembly and is connected to the control handle (21).

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